From 5c8a5c5941aea0d06b37014be9e274690f875d34 Mon Sep 17 00:00:00 2001 From: nobody Date: Thu, 13 Apr 2006 18:12:33 +0000 Subject: [PATCH] This commit was manufactured by cvs2svn to create tag 'r3_1_2_eurosys_cd'. --- commands/flex-2.5.4/.descr | 1 - commands/flex-2.5.4/COPYING | 38 - commands/flex-2.5.4/FlexLexer.h | 186 - commands/flex-2.5.4/INSTALL | 117 - commands/flex-2.5.4/MISC/Amiga/README.amiga | 72 - commands/flex-2.5.4/MISC/Amiga/SMakefile | 195 - commands/flex-2.5.4/MISC/Amiga/config.h | 25 - commands/flex-2.5.4/MISC/Amiga/libmain.ch | 8 - commands/flex-2.5.4/MISC/Amiga/libyywrap.ch | 8 - commands/flex-2.5.4/MISC/Amiga/parse.ych | 8 - commands/flex-2.5.4/MISC/Atari/Atari.patches | 911 ---- .../flex-2.5.4/MISC/Borland.old/Borland-2.4 | 419 -- commands/flex-2.5.4/MISC/Borland.old/Turbo-C | 179 - commands/flex-2.5.4/MISC/Borland/Makefile | 163 - commands/flex-2.5.4/MISC/Borland/NOTES | 66 - commands/flex-2.5.4/MISC/Borland/config.h | 29 - commands/flex-2.5.4/MISC/EBCDIC | 48 - commands/flex-2.5.4/MISC/MSDOS/MSC70.make | 115 - commands/flex-2.5.4/MISC/MSDOS/configur.bat | 6 - commands/flex-2.5.4/MISC/MSDOS/djgpp.sed | 12 - commands/flex-2.5.4/MISC/MVS/MVS.mail | 56 - commands/flex-2.5.4/MISC/MVS/MVS.todo | 23 - commands/flex-2.5.4/MISC/MVS/MVS.uudecode | 341 -- commands/flex-2.5.4/MISC/MVS/README | 44 - commands/flex-2.5.4/MISC/MVS/diffs | 854 ---- commands/flex-2.5.4/MISC/MVS/fixit.l | 138 - commands/flex-2.5.4/MISC/MVS/initscan-mvs.c | 2672 ----------- commands/flex-2.5.4/MISC/MVS/unfixit.l | 141 - .../flex-2.5.4/MISC/Macintosh/THINK_C_notes | 100 - commands/flex-2.5.4/MISC/Macintosh/alloca.c | 195 - commands/flex-2.5.4/MISC/Macintosh/alloca.h | 10 - commands/flex-2.5.4/MISC/Macintosh/xmalloc.c | 69 - commands/flex-2.5.4/MISC/NT/Makefile | 103 - commands/flex-2.5.4/MISC/NT/config.h | 32 - commands/flex-2.5.4/MISC/NeXT | 34 - commands/flex-2.5.4/MISC/OS2/Makefile.os2 | 72 - commands/flex-2.5.4/MISC/OS2/config.h | 28 - commands/flex-2.5.4/MISC/README | 76 - 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commands/flex-2.5.4/skel.c delete mode 100644 commands/flex-2.5.4/sym.c delete mode 100644 commands/flex-2.5.4/tblcmp.c delete mode 100644 commands/flex-2.5.4/version.h delete mode 100644 commands/flex-2.5.4/yylex.c diff --git a/commands/flex-2.5.4/.descr b/commands/flex-2.5.4/.descr deleted file mode 100644 index 3463a4173..000000000 --- a/commands/flex-2.5.4/.descr +++ /dev/null @@ -1 +0,0 @@ -Lexical scanner generator diff --git a/commands/flex-2.5.4/COPYING b/commands/flex-2.5.4/COPYING deleted file mode 100644 index c041f02c4..000000000 --- a/commands/flex-2.5.4/COPYING +++ /dev/null @@ -1,38 +0,0 @@ -Flex carries the copyright used for BSD software, slightly modified -because it originated at the Lawrence Berkeley (not Livermore!) Laboratory, -which operates under a contract with the Department of Energy: - - Copyright (c) 1990 The Regents of the University of California. - All rights reserved. - - This code is derived from software contributed to Berkeley by - Vern Paxson. - - The United States Government has rights in this work pursuant - to contract no. DE-AC03-76SF00098 between the United States - Department of Energy and the University of California. - - Redistribution and use in source and binary forms with or without - modification are permitted provided that: (1) source distributions - retain this entire copyright notice and comment, and (2) - distributions including binaries display the following - acknowledgement: ``This product includes software developed by the - University of California, Berkeley and its contributors'' in the - documentation or other materials provided with the distribution and - in all advertising materials mentioning features or use of this - software. Neither the name of the University nor the names of its - contributors may be used to endorse or promote products derived - from this software without specific prior written permission. - - THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR - IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED - WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR - PURPOSE. - -This basically says "do whatever you please with this software except -remove this notice or take advantage of the University's (or the flex -authors') name". - -Note that the "flex.skl" scanner skeleton carries no copyright notice. -You are free to do whatever you please with scanners generated using flex; -for them, you are not even bound by the above copyright. diff --git a/commands/flex-2.5.4/FlexLexer.h b/commands/flex-2.5.4/FlexLexer.h deleted file mode 100644 index 549177b8b..000000000 --- a/commands/flex-2.5.4/FlexLexer.h +++ /dev/null @@ -1,186 +0,0 @@ -// $Header$ - -// FlexLexer.h -- define interfaces for lexical analyzer classes generated -// by flex - -// Copyright (c) 1993 The Regents of the University of California. -// All rights reserved. -// -// This code is derived from software contributed to Berkeley by -// Kent Williams and Tom Epperly. -// -// Redistribution and use in source and binary forms with or without -// modification are permitted provided that: (1) source distributions retain -// this entire copyright notice and comment, and (2) distributions including -// binaries display the following acknowledgement: ``This product includes -// software developed by the University of California, Berkeley and its -// contributors'' in the documentation or other materials provided with the -// distribution and in all advertising materials mentioning features or use -// of this software. Neither the name of the University nor the names of -// its contributors may be used to endorse or promote products derived from -// this software without specific prior written permission. - -// THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED -// WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF -// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. - -// This file defines FlexLexer, an abstract class which specifies the -// external interface provided to flex C++ lexer objects, and yyFlexLexer, -// which defines a particular lexer class. -// -// If you want to create multiple lexer classes, you use the -P flag -// to rename each yyFlexLexer to some other xxFlexLexer. You then -// include in your other sources once per lexer class: -// -// #undef yyFlexLexer -// #define yyFlexLexer xxFlexLexer -// #include -// -// #undef yyFlexLexer -// #define yyFlexLexer zzFlexLexer -// #include -// ... - -#ifndef __FLEX_LEXER_H -// Never included before - need to define base class. -#define __FLEX_LEXER_H -#include - -extern "C++" { - -struct yy_buffer_state; -typedef int yy_state_type; - -class FlexLexer { -public: - virtual ~FlexLexer() { } - - const char* YYText() { return yytext; } - int YYLeng() { return yyleng; } - - virtual void - yy_switch_to_buffer( struct yy_buffer_state* new_buffer ) = 0; - virtual struct yy_buffer_state* - yy_create_buffer( istream* s, int size ) = 0; - virtual void yy_delete_buffer( struct yy_buffer_state* b ) = 0; - virtual void yyrestart( istream* s ) = 0; - - virtual int yylex() = 0; - - // Call yylex with new input/output sources. - int yylex( istream* new_in, ostream* new_out = 0 ) - { - switch_streams( new_in, new_out ); - return yylex(); - } - - // Switch to new input/output streams. A nil stream pointer - // indicates "keep the current one". - virtual void switch_streams( istream* new_in = 0, - ostream* new_out = 0 ) = 0; - - int lineno() const { return yylineno; } - - int debug() const { return yy_flex_debug; } - void set_debug( int flag ) { yy_flex_debug = flag; } - -protected: - char* yytext; - int yyleng; - int yylineno; // only maintained if you use %option yylineno - int yy_flex_debug; // only has effect with -d or "%option debug" -}; - -} -#endif - -#if defined(yyFlexLexer) || ! defined(yyFlexLexerOnce) -// Either this is the first time through (yyFlexLexerOnce not defined), -// or this is a repeated include to define a different flavor of -// yyFlexLexer, as discussed in the flex man page. -#define yyFlexLexerOnce - -class yyFlexLexer : public FlexLexer { -public: - // arg_yyin and arg_yyout default to the cin and cout, but we - // only make that assignment when initializing in yylex(). - yyFlexLexer( istream* arg_yyin = 0, ostream* arg_yyout = 0 ); - - virtual ~yyFlexLexer(); - - void yy_switch_to_buffer( struct yy_buffer_state* new_buffer ); - struct yy_buffer_state* yy_create_buffer( istream* s, int size ); - void yy_delete_buffer( struct yy_buffer_state* b ); - void yyrestart( istream* s ); - - virtual int yylex(); - virtual void switch_streams( istream* new_in, ostream* new_out ); - -protected: - virtual int LexerInput( char* buf, int max_size ); - virtual void LexerOutput( const char* buf, int size ); - virtual void LexerError( const char* msg ); - - void yyunput( int c, char* buf_ptr ); - int yyinput(); - - void yy_load_buffer_state(); - void yy_init_buffer( struct yy_buffer_state* b, istream* s ); - void yy_flush_buffer( struct yy_buffer_state* b ); - - int yy_start_stack_ptr; - int yy_start_stack_depth; - int* yy_start_stack; - - void yy_push_state( int new_state ); - void yy_pop_state(); - int yy_top_state(); - - yy_state_type yy_get_previous_state(); - yy_state_type yy_try_NUL_trans( yy_state_type current_state ); - int yy_get_next_buffer(); - - istream* yyin; // input source for default LexerInput - ostream* yyout; // output sink for default LexerOutput - - struct yy_buffer_state* yy_current_buffer; - - // yy_hold_char holds the character lost when yytext is formed. - char yy_hold_char; - - // Number of characters read into yy_ch_buf. - int yy_n_chars; - - // Points to current character in buffer. - char* yy_c_buf_p; - - int yy_init; // whether we need to initialize - int yy_start; // start state number - - // Flag which is used to allow yywrap()'s to do buffer switches - // instead of setting up a fresh yyin. A bit of a hack ... - int yy_did_buffer_switch_on_eof; - - // The following are not always needed, but may be depending - // on use of certain flex features (like REJECT or yymore()). - - yy_state_type yy_last_accepting_state; - char* yy_last_accepting_cpos; - - yy_state_type* yy_state_buf; - yy_state_type* yy_state_ptr; - - char* yy_full_match; - int* yy_full_state; - int yy_full_lp; - - int yy_lp; - int yy_looking_for_trail_begin; - - int yy_more_flag; - int yy_more_len; - int yy_more_offset; - int yy_prev_more_offset; -}; - -#endif diff --git a/commands/flex-2.5.4/INSTALL b/commands/flex-2.5.4/INSTALL deleted file mode 100644 index 6e7ed85d2..000000000 --- a/commands/flex-2.5.4/INSTALL +++ /dev/null @@ -1,117 +0,0 @@ -This is a generic INSTALL file for utilities distributions. -If this package does not come with, e.g., installable documentation or -data files, please ignore the references to them below. - -To compile this package: - -1. Configure the package for your system. In the directory that this -file is in, type `./configure'. If you're using `csh' on an old -version of System V, you might need to type `sh configure' instead to -prevent `csh' from trying to execute `configure' itself. - -The `configure' shell script attempts to guess correct values for -various system-dependent variables used during compilation, and -creates the Makefile(s) (one in each subdirectory of the source -directory). In some packages it creates a C header file containing -system-dependent definitions. It also creates a file `config.status' -that you can run in the future to recreate the current configuration. - -Running `configure' takes a minute or two. While it is running, it -prints some messages that tell what it is doing. If you don't want to -see the messages, run `configure' with its standard output redirected -to `/dev/null'; for example, `./configure >/dev/null'. - -To compile the package in a different directory from the one -containing the source code, you must use a version of `make' that -supports the VPATH variable, such as GNU `make'. `cd' to the directory -where you want the object files and executables to go and run -`configure'. `configure' automatically checks for the source code in -the directory that `configure' is in and in `..'. If for some reason -`configure' is not in the source code directory that you are -configuring, then it will report that it can't find the source code. -In that case, run `configure' with the option `--srcdir=DIR', where -DIR is the directory that contains the source code. - -By default, `make install' will install the package's files in -/usr/local/bin, /usr/local/lib, /usr/local/man, etc. You can specify -an installation prefix other than /usr/local by giving `configure' the -option `--prefix=PATH'. Alternately, you can do so by giving a value -for the `prefix' variable when you run `make', e.g., - make prefix=/usr/gnu - -You can specify separate installation prefixes for -architecture-specific files and architecture-independent files. If -you give `configure' the option `--exec-prefix=PATH' or set the -`make' variable `exec_prefix' to PATH, the package will use PATH as -the prefix for installing programs and libraries. Data files and -documentation will still use the regular prefix. Normally, all files -are installed using the regular prefix. - -Another `configure' option is useful mainly in `Makefile' rules for -updating `config.status' and `Makefile'. The `--no-create' option -figures out the configuration for your system and records it in -`config.status', without actually configuring the package (creating -`Makefile's and perhaps a configuration header file). Later, you can -run `./config.status' to actually configure the package. You can also -give `config.status' the `--recheck' option, which makes it re-run -`configure' with the same arguments you used before. This option is -useful if you change `configure'. - -Some packages pay attention to `--with-PACKAGE' options to `configure', -where PACKAGE is something like `gnu-libc' or `x' (for X windows). -The README should mention any --with- options that the package recognizes. - -`configure' ignores any other arguments that you give it. - -If your system requires unusual options for compilation or linking -that `configure' doesn't know about, you can give `configure' initial -values for some variables by setting them in the environment. In -Bourne-compatible shells, you can do that on the command line like -this: - CC='gcc -traditional' DEFS=-D_POSIX_SOURCE ./configure - -The `make' variables that you might want to override with environment -variables when running `configure' are: - -(For these variables, any value given in the environment overrides the -value that `configure' would choose:) -CC C compiler program. - Default is `cc', or `gcc' if `gcc' is in your PATH. -INSTALL Program to use to install files. - Default is `install' if you have it, `cp' otherwise. - -(For these variables, any value given in the environment is added to -the value that `configure' chooses:) -DEFS Configuration options, in the form `-Dfoo -Dbar ...' - Do not use this variable in packages that create a - configuration header file. -LIBS Libraries to link with, in the form `-lfoo -lbar ...' - -If you need to do unusual things to compile the package, we encourage -you to figure out how `configure' could check whether to do them, and -mail diffs or instructions to the address given in the README so we -can include them in the next release. - -2. Type `make' to compile the package. If you want, you can override -the `make' variables CFLAGS and LDFLAGS like this: - - make CFLAGS=-O2 LDFLAGS=-s - -3. If the package comes with self-tests and you want to run them, -type `make check'. If you're not sure whether there are any, try it; -if `make' responds with something like - make: *** No way to make target `check'. Stop. -then the package does not come with self-tests. - -4. Type `make install' to install programs, data files, and -documentation. - -5. You can remove the program binaries and object files from the -source directory by typing `make clean'. To also remove the -Makefile(s), the header file containing system-dependent definitions -(if the package uses one), and `config.status' (all the files that -`configure' created), type `make distclean'. - -The file `configure.in' is used as a template to create `configure' by -a program called `autoconf'. You will only need it if you want to -regenerate `configure' using a newer version of `autoconf'. diff --git a/commands/flex-2.5.4/MISC/Amiga/README.amiga b/commands/flex-2.5.4/MISC/Amiga/README.amiga deleted file mode 100644 index 0efdb9383..000000000 --- a/commands/flex-2.5.4/MISC/Amiga/README.amiga +++ /dev/null @@ -1,72 +0,0 @@ - -This file, ./MISC/Amiga/README.amiga, describes the necessary steps to get -the FLEX 2.5.1 program up and running on the Commodore AMIGA with the -help of SAS/C++ 6.51 and SMake 6.50. Also it describes the contents of the -subdirectory ./MISC/Amiga, where `.' denotes the root directory of the -standard installation of FLEX 2.5.1. - - -FILES ADDED FOR INSTALLING FLEX 2.5.1 ON THE AMIGA - -The standard distribution of FLEX 2.5.1 is assumed to be installed on -your AMIGA computer. `Installed' means that all source files from the -original archive are present in a root directory (denoted by `.' in what -follows) and, if appropriate, one or more subdirectories, on your machine. - -The original source files are totally left untouched, the necessary changes -are applied in the form of `change files'. For installing FLEX 2.5.1 on -the AMIGA, several additional files come with this patch. - - -----rw-d 2 738 Apr 3 11:49 config.h - -----rw-d 1 169 Apr 3 11:33 libmain.ch - -----rw-d 1 159 Apr 3 11:33 libyywrap.ch - -----rw-d 1 167 Apr 3 11:33 parse.ych - -----rw-d 6 2840 Apr 3 11:34 README.amiga - -----rw-d 11 5503 Apr 3 11:45 smakefile - Dirs:0 Files:6 Blocks:22 Bytes:9576 - - -HOW TO INSTALL FLEX 2.5.1 ON THE AMIGA - -Copy all files from ./MISC/Amiga to the root directory of the FLEX 2.5.1 -distribution and edit `SMakefile' as it instructs you. There shouldn't be -too many changes necessary. Then say "make bootflex". This creates a -preliminary version of FLEX 2.5.1 without using itself. - -WARNING: Don't say "make flex" yet. Any pre-2.5 version of FLEX will fail -on the file `scan.l' due to some new features only present in FLEX 2.5. - -Then say "make flex". At least once the FLEX program created in the first -step will be used. To make sure that everything is alright, finally say -"make check". If you change the code, you should also say "make bigcheck" -for some more thorough testing. - -When you are satisfied with the results, say "make install". This will -copy the `flex' binary, the `libfl.lib' file, and the `FlexLexer.h' header -to the paths specified in the `SMakefile'. - -Finally, you should say "make clean" to remove all intermediate files from -the root directory. "make veryclean" also removes `flex' and `scan.c'. - - -TROUBLE SHOOTING - -FLEX 2.5.1 was ported to the AMIGA and tested with the following setup: - - AMIGA 2000 - GVP G-Force 030/50/50/8 - SAS/C++ 6.51 - SED 2.05 - BISON 1.22 - WMERGE from the CWEB distribution - -Should you encounter problems with this AMIGA patch for FLEX 2.5.1 or -should you have ideas for further improvements, like using GnuMake instead -of SMake, contact the author of this contribution - -Andreas Scherer -Roland-Stra{\ss}e 16 -52070 Aachen -Germany - - (Internet) diff --git a/commands/flex-2.5.4/MISC/Amiga/SMakefile b/commands/flex-2.5.4/MISC/Amiga/SMakefile deleted file mode 100644 index fc6c1ef60..000000000 --- a/commands/flex-2.5.4/MISC/Amiga/SMakefile +++ /dev/null @@ -1,195 +0,0 @@ -# @(#) $Header$ (LBL) - -# If your version of "make" does not define $(MAKE), comment in the -# definition of "MAKE" below. (You only need to do this if you intend -# to do "make bigcheck" or "make dist".) -MAKE = smake - -# Possible values for DEFS: -# -# For flex to always generate 8-bit scanners, add "-DDEFAULT_CSIZE=256" -# to DEFS. -# -# For Vax/VMS, add "-DVMS" to DEFS. -# -# For MS-DOS, add "-DMS_DOS" to DEFS. See the directory MISC/MSDOS for -# additional info. - -CFLAGS = data=far ignore=85 noicons stackextend optimize -DEFS = define=YYBISON=1 define=YY_NEVER_INTERACTIVE=1 -LDFLAGS = noicons -LIBS = - -# Installation targeting. Files will be installed under the tree -# rooted at prefix. flex will be installed in bindir, libfl.lib in -# libdir, FlexLexer.h will be installed in includedir, and the manual -# pages will be installed in mandir with extension manext. -# -# Raw, unformatted troff source will be installed if INSTALLMAN=man, -# nroff preformatted versions will be installed if INSTALLMAN=cat. - -prefix = Programmer:other # Change this for your AMIGA system. -exec_prefix = $(prefix) -bindir = $(exec_prefix)/bin -libdir = $(exec_prefix)/lib -includedir = $(prefix)/include -manext = 1 -mandir = $(prefix)/man/man$(manext) - -# You can define this to be "lex" if you want to replace lex at your site. -FLEX = flex - -INSTALLMAN = man - -SHELL = -srcdir = . -VPATH = - -LN_S = -YACC = bison -y -SED = sed -CC = sc -WMERGE = wmerge # from the CWEB distribution -AR = oml -RANLIB = -INSTALL = copy clone -INSTALL_DATA = $(INSTALL) -INSTALL_PROGRAM = $(INSTALL) - -# You normally do not need to modify anything below this point. -# ------------------------------------------------------------ - -CPPFLAGS = idir=. idir=$(srcdir) $(DEFS) - -.c.o: - $(CC) $(CPPFLAGS) $(CFLAGS) $< - -HEADERS = flexdef.h version.h - -SOURCES = ccl.c dfa.c ecs.c gen.c main.c misc.c nfa.c parse.y \ - scan.l skel.c sym.c tblcmp.c yylex.c -OBJECTS = ccl.o dfa.o ecs.o gen.o main.o misc.o nfa.o parse.o \ - skel.o sym.o tblcmp.o yylex.o \ - $(libdir)/alloca.o $(libdir)/xmalloc.o - -LIBSRCS = libmain.c libyywrap.c -LIBOBJS = ansilibmain.o ansilibyywrap.o - -LINTSRCS = ccl.c dfa.c ecs.c gen.c main.c misc.c nfa.c parse.c \ - scan.c skel.c sym.c tblcmp.c yylex.c - -DISTFILES = README NEWS COPYING INSTALL FlexLexer.h \ - configure.in conf.in Makefile.in mkskel.sh skel.c flex.skl \ - $(HEADERS) $(SOURCES) $(LIBSRCS) MISC \ - flex.1 scan.c install.sh mkinstalldirs configure - -DIST_NAME = flex - -# which "flex" to use to generate scan.c from scan.l -FLEX_EXEC = ./$(FLEX) -FLEX_FLAGS = -t $(PERF_REPORT) -COMPRESSION = -PERF_REPORT = -p - -FLEXLIB = libfl.lib - -all: $(FLEX) - -$(FLEX): $(OBJECTS) $(FLEXLIB) scan.o - $(CC) $(CFLAGS) link to $(FLEX) $(LDFLAGS) $(OBJECTS) scan.o $(FLEXLIB) $(LIBS) - -bootflex: $(OBJECTS) $(FLEXLIB) initscan.o - $(CC) $(CFLAGS) link to $(FLEX) $(LDFLAGS) $(OBJECTS) initscan.o $(FLEXLIB) $(LIBS) - -parse.c: ansiparse.y - $(YACC) -d ansiparse.y - $(SED) "/extern char.*malloc/d" parse.tmp - copy parse.tmp parse.c - copy y.tab.h parse.h - @delete y.tab.c y.tab.h parse.tmp -ansiparse.y: $(srcdir)/parse.y parse.ych - $(WMERGE) $(srcdir)/parse.y parse.ych ansiparse.y - -parse.h: parse.c - -scan.c: scan.l - $(FLEX_EXEC) $(FLEX_FLAGS) $(COMPRESSION) $(srcdir)/scan.l >scan.tmp - $(SED) s,\"$(srcdir)/scan.l\",\"scan.l\", scan.c - @delete scan.tmp - -scan.o: scan.c parse.h flexdef.h config.h -initscan.o: initscan.c parse.h flexdef.h config.h -yylex.o: yylex.c parse.h flexdef.h config.h - -skel.c: flex.skl mkskel.sh - $(SHELL) $(srcdir)/mkskel.sh $(srcdir)/flex.skl >skel.c - -main.o: main.c flexdef.h config.h version.h -ccl.o: ccl.c flexdef.h config.h -dfa.o: dfa.c flexdef.h config.h -ecs.o: ecs.c flexdef.h config.h -gen.o: gen.c flexdef.h config.h -misc.o: misc.c flexdef.h config.h -nfa.o: nfa.c flexdef.h config.h -parse.o: parse.c flexdef.h config.h -skel.o: skel.c flexdef.h config.h -sym.o: sym.c flexdef.h config.h -tblcmp.o: tblcmp.c flexdef.h config.h - -alloca.o: alloca.c - $(CC) $(CPPFLAGS) $(CFLAGS) define=xmalloc=yy_flex_xmalloc alloca.c - -alloca.c: $(srcdir)/MISC/alloca.c - @delete alloca.c - copy $(srcdir)/MISC/alloca.c . - -test: check -check: flex - $(FLEX_EXEC) $(FLEX_FLAGS) $(COMPRESSION) $(srcdir)/scan.l > temp_a - $(SED) s,"$(srcdir)/scan.l","scan.l", < temp_a > temp_b - -diff scan.c temp_b -l10000 -w - @delete temp_? - @echo "Check successful, using COMPRESSION='$(COMPRESSION)'" - -bigcheck: - delete scan.c - $(MAKE) COMPRESSION=-C check - delete scan.c - $(MAKE) COMPRESSION=-Ce check - delete scan.c - $(MAKE) COMPRESSION=-Cm check - delete scan.c - $(MAKE) COMPRESSION=-Cfea check - delete scan.c - $(MAKE) COMPRESSION=-CFer check - delete scan.c - $(MAKE) COMPRESSION=-l PERF_REPORT= check - delete scan.c - $(MAKE) - @echo "All checks successful" - -$(FLEXLIB): $(LIBOBJS) - $(AR) $(FLEXLIB) R $(LIBOBJS) - -$(FLEX).man: flex.1 # SMAKE can't `cd', sorry. And, I don't have nroff. -# cd $(srcdir), nroff -man flex.1 >$(FLEX).man - -install: $(FLEX) $(FLEXLIB) - $(INSTALL_PROGRAM) $(FLEX) $(bindir)/$(FLEX) -# @delete $(bindir)/$(FLEX)++ - $(INSTALL_DATA) $(FLEXLIB) $(libdir)/libfl.lib - $(INSTALL_DATA) $(srcdir)/FlexLexer.h $(includedir)/FlexLexer.h - -ansilibmain.o: ansilibmain.c -ansilibmain.c: libmain.c libmain.ch - $(WMERGE) libmain.c libmain.ch ansilibmain.c -ansilibyywrap.o: ansilibyywrap.c -ansilibyywrap.c: libyywrap.c libyywrap.ch - $(WMERGE) libyywrap.c libyywrap.ch ansilibyywrap.c - -clean: - -delete parse.(c|h) ansi\#? \#?.(bak|o|lnk) \ - alloca.c lex.yy.(c|cc) $(FLEXLIB) - -veryclean: clean - -delete $(FLEX) scan.c diff --git a/commands/flex-2.5.4/MISC/Amiga/config.h b/commands/flex-2.5.4/MISC/Amiga/config.h deleted file mode 100644 index 8eb279fcf..000000000 --- a/commands/flex-2.5.4/MISC/Amiga/config.h +++ /dev/null @@ -1,25 +0,0 @@ -/* $Header$ */ - -/* Define to empty if the keyword does not work. */ -#undef const - -/* Define to `unsigned' if doesn't define. */ -#undef size_t - -/* Define if you have the ANSI C header files. */ -#define STDC_HEADERS 1 - -/* Define if you have the header file. */ -#undef HAVE_MALLOC_H - -/* Define if you have the header file. */ -#define HAVE_STRING_H 1 - -/* Define if you have the header file. */ -#define HAVE_SYS_TYPES_H 1 - -/* Define if you have and it should be used (not on Ultrix). */ -#undef HAVE_ALLOCA_H - -/* Define if platform-specific command line handling is necessary. */ -#undef NEED_ARGV_FIXUP diff --git a/commands/flex-2.5.4/MISC/Amiga/libmain.ch b/commands/flex-2.5.4/MISC/Amiga/libmain.ch deleted file mode 100644 index e0f5b4090..000000000 --- a/commands/flex-2.5.4/MISC/Amiga/libmain.ch +++ /dev/null @@ -1,8 +0,0 @@ -Changes for LIBMAIN.C 2.4.7 by Andreas Scherer, January 19, 1995. -Modified for LIBMAIN.C 2.5.1, April 3, 1995. - -@x l.5 -extern int yylex(); -@y -extern int yylex(void); -@z diff --git a/commands/flex-2.5.4/MISC/Amiga/libyywrap.ch b/commands/flex-2.5.4/MISC/Amiga/libyywrap.ch deleted file mode 100644 index b2d6a3fe3..000000000 --- a/commands/flex-2.5.4/MISC/Amiga/libyywrap.ch +++ /dev/null @@ -1,8 +0,0 @@ -Changes for LIBYYWRAP.C 2.4.7 by Andreas Scherer, January 19, 1995. -Modified for LIBYYWRAP.C 2.5.1, April 3, 1995. - -@x l.5 -int yywrap() -@y -int yywrap(void) -@z diff --git a/commands/flex-2.5.4/MISC/Amiga/parse.ych b/commands/flex-2.5.4/MISC/Amiga/parse.ych deleted file mode 100644 index 5671a5b1e..000000000 --- a/commands/flex-2.5.4/MISC/Amiga/parse.ych +++ /dev/null @@ -1,8 +0,0 @@ -Changes for PARSE.Y 2.4.7 by Andreas Scherer, January 20, 1995. -Modified for PARSE.Y 2.5.1, April 3, 1995. - -@x l.60 -char *alloca (); -@y -char *alloca(unsigned int); -@z diff --git a/commands/flex-2.5.4/MISC/Atari/Atari.patches b/commands/flex-2.5.4/MISC/Atari/Atari.patches deleted file mode 100644 index 69e9ceb45..000000000 --- a/commands/flex-2.5.4/MISC/Atari/Atari.patches +++ /dev/null @@ -1,911 +0,0 @@ -(Message inbox:32) -Date: Mon, 03 Jul 89 21:15:32 CET -From: V61%DHDURZ1.BITNET@lbl.gov -Subject: Flex, bug fix, improvments, patches for Minix & TOS -To: vern@lbl-csam.arpa - -At first I have to thank you for your wonderful program. I had ported the -old version to OS9,TOS (Atari ST) and Minix and the new version 2.1 Beta -to Minix and TOS. - -While porting and using flex I detected a bug and made some improvements. -I have included a shared, compressed and uuencoded file contaning all cdiffs -and additional files (Sorry, but I'm on EBCDIC-Bitnet) and a short discussion -of the changes. Even some of the TOS specific changes might be of general -interest ! - -I posted these cdiffs to the minix discussion group, but I think it's up -to you to post them to the unix-sources group. If you plan to post even -the TOS compiler specific patches please contact me because there might be -further compiler (P.D.) additions. If you have an interest I could also -port the new version to OS9 -- this is a little bit more difficult, because -OS9 uses CR as end of line character (the EOL char. is coded into the -initscan.c tables,...). It is necessary to change all occurences of '\n' to -macros and variables and it's useful to add a new -n options (see commented -line in main.c) - - - -The changes: (1.7.89 RAL) - - - Bug fix: The original flex didn't like trailing spaces in exclusive start - condition lists ! If you add an trailing space to line 68 in scan.l - - "%x SECT2 SECT2PROLOG SECT3 CODEBLOCK PICKUPDEF SC CARETISBOL NUM QUOTE " - - you get a misleading error message: - - "Syntax error at line 69: bad start condition list" - - This bug can either be fixed in parse.y or in scan.l . I have chosen the - last because there the fix is minimal: Just change the rule (line 128) - - "\n" to "{OPTWS}\n" - - - Enhancements: - - new option "-?" that provides some help information about the other - flags (main.c) - - new option "-aTMPPATH" that allows a redefinition of the standard - path for the temporary file (this might be rather large >200k if - F,f options are selected). (main.c, flexdef.h (l.376)) - - hexdump of illegal characters -- this proved to be a useful debugging - tool especialy if invisible control characters occur which weren't - covered by the rules. (scan.l fprintf statement line 129,...) - - - Patches due to TOS - - General: TOS uses CR,LF as end of line char., Flex wants only a single - LF as EOL char. Therefore all I/O must be translated using f* calls. - This is done everywhere besides the YY_INPUT macro (flex.skel (scan.c), - line 31) that uses a low level 'read'. This should be definitly changed - to fread, so that all I/O calls occur on the same level. - - the short action_file_name has been "flexXXXXXX.tmp", but that's too - much for TOS,MSDOS ! I changed it to "flexXXXX.tmp" in main.c (patch - covered by the -a option additions) - - some compilers don't like external names that are ambiguous within - the first 8 characters. I defined macros that change all these long - external names to names that are unique within the first 8 characters. - Just define SHORT_EXTERNAL_NAMES to use this feature (flexdef.h) - - some statement changes that some compiler don't like: - typedef *xxx[] -> typedef **xxx (flexdef.h.,l.308) - "/*" -> '/','*' within a comment in (scan.l, l.209) - - changed short "lexyy.c" to "lex_yy.c" what's more similar to the unix - "lex.yy.c" (main.c). - - a few further really compiler dependent changes provided with - #ifdef ATARI && LATTICE res. TURBO braces. - - - Additional TOS only files - - Makefile.tos: Common makefile for all TOS compilers. If you add further - ones please email me the new makefile. - - flex.lnk: Lattice - GST linker argument extension file - - flex.tlk: Turbo linker argument extension file - - -Additional remarks: - -I didn't add a new initscan.c (= flex -ist scan.l). The current one is good -enough for a first compilation. With this first version of flex you can -rebuild your own scan.c and the final flex version ! - -Minix ST : - - I had to "chmem =70000 cv" (>50000) to get flex linked - - 'memset' (PC 1.3, EFTH40,...) is necessary - - chmem =90000 flex may be sufficient - -Minix PC : - It should be possible to port Flex to Minix PC. The current sizes of flex - are: - Minix ST (ACK) Lattice (TOS) Turbo (TOS) - - size 75300 83305 57957 - compilation time 22' 15' 3'40" - flex -is scan.l 1'49" 43" 30" - - The Minix ST size includes the bad generated code using only a subset of - the 68000 commands, long addresses only and a huge relocation table. - Therefore the PC size will be <64 k ! More serious is the fact that I had - to chmem =90000 flex to get scan.l converted to scan.c . But I never saw - a more complex lex source than scan.l -- so it should be possible to - reduce some array sizes without limitation for all day usage. - - No one volunteered yet for a Minix PC port -- but if someone will try it - I would provide him with a new scan.c and some hints. - -TOS: - Don't forget to adapt the flexskel path within flexdef.h ! - - -Bitnet: V61@DHDURZ1 Ronald Lamprecht -UUCP: ...!unido!DHDURZ1.bitnet!V61 Theoretische Physik -ARPAnet: V61%DHDURZ1.BITNET@CUNYVM.CUNY.EDU (Heidelberg, West Germany) -(Message inbox:36) -Date: Wed, 05 Jul 89 21:16:07 CET -From: V61%DHDURZ1.BITNET@csa2.lbl.gov -Subject: Re: What is TOS -To: vern@lbl-csam.arpa - -TOS is the name of the Atari ST operating system that is very similar -to MSDOS (Both use CR,LF as end of line character). Therefore I have -been astonished that no EOL convertion porblems occur within MSDOS. - -I have been aware of the double buffering when changing read to fread and I -accept your argument of a possible slow down. But if you integrate the other -Atari - TOS changes, please insert a - #ifdef ATARI - fread .... - #else - read .... - #endif -in flex.skel . - -Bitnet: V61@DHDURZ1 Ronald Lamprecht -UUCP: ...!unido!DHDURZ1.bitnet!V61 Theoretische Physik -ARPAnet: V61%DHDURZ1.BITNET@CUNYVM.CUNY.EDU (Heidelberg, West Germany) - - - - -echo x - Makefile_cdiff -sed '/^X/s///' > Makefile_cdiff << '/' -X*** Src_2.1/Makefile Thu Jun 28 00:06:42 1989 -X--- Makefile Thu Jul 3 02:12:48 1989 -X*************** -X*** 5,10 **** -X--- 5,11 ---- -X # Porting considerations: -X # -X # For System V Unix machines, add -DSYS_V to CFLAGS. -X+ # For Minix (ST), add -DSYS_V to CFLAGS -X # For Vax/VMS, add -DSYS_V to CFLAGS. -X # For MS-DOS, add "-DMS_DOS -DSYS_V" to CFLAGS. Create \tmp if not present. -X # You will also want to rename flex.skel to something with a three -X*************** -X*** 21,28 **** -X SKELETON_DIR = /usr/local/lib -X SKELETON_FILE = flex.skel -X SKELFLAGS = -DDEFAULT_SKELETON_FILE=\"$(SKELETON_DIR)/$(SKELETON_FILE)\" -X! CFLAGS = -O -X! LDFLAGS = -s -X -X FLEX_FLAGS = -X FLEX = ./flex -X--- 22,29 ---- -X SKELETON_DIR = /usr/local/lib -X SKELETON_FILE = flex.skel -X SKELFLAGS = -DDEFAULT_SKELETON_FILE=\"$(SKELETON_DIR)/$(SKELETON_FILE)\" -X! CFLAGS = -O -DSYS_V -X! LDFLAGS = -X -X FLEX_FLAGS = -X FLEX = ./flex -X*************** -X*** 57,63 **** -X yylex.c -X -X flex : $(FLEXOBJS) -X! $(CC) $(CFLAGS) -o flex $(LDFLAGS) $(FLEXOBJS) -X -X first_flex: -X cp initscan.c scan.c -X--- 58,65 ---- -X yylex.c -X -X flex : $(FLEXOBJS) -X! $(CC) $(CFLAGS) -o flex $(FLEXOBJS) $(LDFLAGS) -X! chmem =150000 flex -X -X first_flex: -X cp initscan.c scan.c -/ -echo x - flex.skel_cdif -sed '/^X/s///' > flex.skel_cdif << '/' -X*** Src_2.1/flex.skel Thu Jun 28 00:19:20 1989 -X--- flex.skel Thu Jul 2 22:18:31 1989 -X*************** -X*** 28,34 **** -X * is returned in "result". -X */ -X #define YY_INPUT(buf,result,max_size) \ -X! if ( (result = read( fileno(yyin), buf, max_size )) < 0 ) \ -X YY_FATAL_ERROR( "read() in flex scanner failed" ); -X #define YY_NULL 0 -X #define yyterminate() return ( YY_NULL ) -X--- 28,34 ---- -X * is returned in "result". -X */ -X #define YY_INPUT(buf,result,max_size) \ -X! if ( (result = fread( buf,1, max_size, yyin )) < 0 ) \ -X YY_FATAL_ERROR( "read() in flex scanner failed" ); -X #define YY_NULL 0 -X #define yyterminate() return ( YY_NULL ) -/ -echo x - flexdef.h_cdif -sed '/^X/s///' > flexdef.h_cdif << '/' -X*** Src_2.1/flexdef.h Thu Jun 28 00:43:27 1989 -X--- flexdef.h Thu Jul 3 02:45:50 1989 -X*************** -X*** 26,31 **** -X--- 26,40 ---- -X -X /* @(#) $Header$ (LBL) */ -X -X+ #ifdef ATARI -X+ #define SYS_V -X+ #define abs(x) ((x) < 0 ? -(x) : (x)) -X+ #define SHORT_FILE_NAMES -X+ #ifdef TURBO -X+ #define SHORT_EXTERNAL_NAMES -X+ #endif -X+ #endif -X+ -X #ifndef FILE -X #include -X #endif -X*************** -X*** 41,47 **** -X #endif -X -X #ifndef VMS -X! char *memset(); -X #else -X /* memset is needed for old versions of the VMS C runtime library */ -X #define memset(s, c, n) \ -X--- 50,58 ---- -X #endif -X -X #ifndef VMS -X! #ifndef ATARI && TURBO -X! char *memset(); -X! #endif -X #else -X /* memset is needed for old versions of the VMS C runtime library */ -X #define memset(s, c, n) \ -X*************** -X*** 81,91 **** -X--- 92,129 ---- -X #define true 1 -X #define false 0 -X -X+ #ifdef ATARI -X+ #define DEFAULT_SKELETON_FILE "D:\\include\\flexskel" -X+ #endif -X+ -X -X #ifndef DEFAULT_SKELETON_FILE -X #define DEFAULT_SKELETON_FILE "flex.skel" -X #endif -X -X+ #ifdef SHORT_EXTERNAL_NAMES -X+ /* avoid long external names that are ambiguous within the first 8 characters */ -X+ #define current_mns c__mns -X+ #define current_max_rules c__max_rules -X+ #define current_max_state_type c__max_state_type -X+ #define current_max_scs c__max_scs -X+ #define current_max_dfa_size c__max__size -X+ #define current_max_xpairs c__max_xpairs -X+ #define current_max_template_xpairs c__max_template_xpairs -X+ #define current_max_dfas c__max_dfas -X+ #define current_maxccls c__maxccles -X+ #define current_max_ccl_tbl_size c__max_ccl_tbl_size -X+ #define indent_puts ind_puts -X+ #define indent_put2s ind_put2s -X+ #define gen_next_compressed_state gen_n_comressed_state -X+ #define gen_next_match gen_n_match -X+ #define gen_next_state gen_n_state -X+ #define variable_trailing_context_rules var_tr_context_rules -X+ #define variable_trailing_rule var_tr_rule -X+ #define backtrack_report backtr_report -X+ #define backtrack_file backtr_file -X+ #endif -X+ -X /* special chk[] values marking the slots taking by end-of-buffer and action -X * numbers -X */ -X*************** -X*** 305,311 **** -X int int_val; -X } ; -X -X! typedef struct hash_entry *hash_table[]; -X -X #define NAME_TABLE_HASH_SIZE 101 -X #define START_COND_HASH_SIZE 101 -X--- 343,349 ---- -X int int_val; -X } ; -X -X! typedef struct hash_entry **hash_table; -X -X #define NAME_TABLE_HASH_SIZE 101 -X #define START_COND_HASH_SIZE 101 -X*************** -X*** 372,378 **** -X extern int datapos, dataline, linenum; -X extern FILE *skelfile, *yyin, *temp_action_file, *backtrack_file; -X extern char *infilename; -X! extern char action_file_name[]; -X -X -X /* variables for stack of states having only one out-transition: -X--- 410,416 ---- -X extern int datapos, dataline, linenum; -X extern FILE *skelfile, *yyin, *temp_action_file, *backtrack_file; -X extern char *infilename; -X! extern char *action_file_name; -X -X -X /* variables for stack of states having only one out-transition: -/ -echo x - main.c_cdiff -sed '/^X/s///' > main.c_cdiff << '/' -X*** Src_2.1/main.c Thu Jun 28 00:30:39 1989 -X--- main.c Thu Jul 3 02:27:47 1989 -X*************** -X*** 81,96 **** -X FILE *temp_action_file; -X FILE *backtrack_file; -X int end_of_buffer_state; -X! #ifndef SHORT_FILE_NAMES -X! char action_file_name[] = "/tmp/flexXXXXXX"; -X! #else -X! char action_file_name[] = "flexXXXXXX.tmp"; -X! #endif -X! -X #ifndef SHORT_FILE_NAMES -X static char outfile[] = "lex.yy.c"; -X #else -X! static char outfile[] = "lexyy.c"; -X #endif -X static int outfile_created = 0; -X -X--- 81,91 ---- -X FILE *temp_action_file; -X FILE *backtrack_file; -X int end_of_buffer_state; -X! char *action_file_name; -X #ifndef SHORT_FILE_NAMES -X static char outfile[] = "lex.yy.c"; -X #else -X! static char outfile[] = "lex_yy.c"; -X #endif -X static int outfile_created = 0; -X -X*************** -X*** 328,333 **** -X--- 323,329 ---- -X { -X int i, sawcmpflag, use_stdout; -X char *arg, *skelname = NULL, *flex_gettime(), clower(), *mktemp(); -X+ char *tmp_action =(char *)0, *malloc(); -X -X printstats = syntaxerror = trace = spprdflt = interactive = caseins = false; -X backtrack_report = performance_report = ddebug = fulltbl = fullspd = false; -X*************** -X*** 349,354 **** -X--- 345,355 ---- -X for ( i = 1; arg[i] != '\0'; ++i ) -X switch ( arg[i] ) -X { -X+ case 'a': -X+ if ( i != 1 ) -X+ flexerror( "-a flag must be given separately" ); -X+ tmp_action = &arg[i+1]; -X+ goto get_next_arg; -X case 'b': -X backtrack_report = true; -X break; -X*************** -X*** 445,452 **** -X printstats = true; -X break; -X -X! default: -X! lerrif( "unknown flag %c", (int) arg[i] ); -X break; -X } -X -X--- 446,458 ---- -X printstats = true; -X break; -X -X! case '?': -X! flexinfo(0); -X! break; -X! -X! default: -X! fprintf(stderr,"flex : unknown flag %c\n", (int) arg[i] ); -X! flexinfo(1); -X break; -X } -X -X*************** -X*** 454,459 **** -X--- 460,493 ---- -X ; -X } -X -X+ -X+ /* if you change the default tmp file names don't forget to change the -X+ initialization for i, too ! -X+ -X+ */ -X+ #ifndef SHORT_FILE_NAMES -X+ i = 10; -X+ if (!tmp_action) i += 5; -X+ #else -X+ i = 12; -X+ #endif -X+ if (tmp_action) -X+ i += strlen(tmp_action) + 1; -X+ if((action_file_name = malloc(i+1)) == (char *)0) -X+ flexerror("No memory for action_file_name"); -X+ *action_file_name = (char) NULL; -X+ if (tmp_action) -X+ strcat(action_file_name,tmp_action); -X+ #ifndef SHORT_FILE_NAMES -X+ else -X+ strcat(action_file_name,"/tmp"); -X+ strcat(action_file_name,"/flexXXXXXX"); -X+ #else -X+ if (tmp_action) -X+ strcat(action_file_name,"/"); -X+ strcat(action_file_name,"flexXXXX.tmp"); -X+ #endif -X+ -X if ( (fulltbl || fullspd) && usemecs ) -X flexerror( "full table and -cm don't make sense together" ); -X -X*************** -X*** 520,526 **** -X if ( (skelfile = fopen( skelname, "r" )) == NULL ) -X lerrsf( "can't open skeleton file %s", skelname ); -X -X! (void) mktemp( action_file_name ); -X -X if ( (temp_action_file = fopen( action_file_name, "w" )) == NULL ) -X lerrsf( "can't open temporary action file %s", action_file_name ); -X--- 554,562 ---- -X if ( (skelfile = fopen( skelname, "r" )) == NULL ) -X lerrsf( "can't open skeleton file %s", skelname ); -X -X! #ifndef ATARI && LATTICE -X! (void) mktemp( action_file_name ); -X! #endif -X -X if ( (temp_action_file = fopen( action_file_name, "w" )) == NULL ) -X lerrsf( "can't open temporary action file %s", action_file_name ); -X*************** -X*** 566,571 **** -X--- 602,640 ---- -X } -X -X -X+ flexinfo(status) -X+ int status; -X+ { -X+ fprintf(stderr,"Syntax : FLEX inp_file\n"); -X+ fprintf(stderr,"Function: fast lexical analyzer generator V%s\n",flex_version); -X+ fprintf(stderr,"Options : a dir_path : directory path for temporary files\n"); -X+ fprintf(stderr," - b : generate backtracking information to lex.backtrack\n"); -X+ fprintf(stderr," - c : compressed table, no equiv., no meta equiv.classes\n"); -X+ fprintf(stderr," e : equivalence classes\n"); -X+ fprintf(stderr," F : fast table\n"); -X+ fprintf(stderr," |f : full table\n"); -X+ fprintf(stderr," |m : meta equivalence classes\n"); -X+ fprintf(stderr," - d : generate debugging scanner\n"); -X+ fprintf(stderr," - F : fast table\n"); -X+ fprintf(stderr," - f : full (not compressed) table\n"); -X+ fprintf(stderr," - I : generate interactive scanner\n"); -X+ fprintf(stderr," - i : generate case-insensitive scanner\n"); -X+ fprintf(stderr," - L : supress #line directives\n"); -X+ /* fprintf(stderr," - n hexnum : generate scanner using as newline char.\n");*/ -X+ fprintf(stderr," - p : generate performance report to stderr\n"); -X+ fprintf(stderr," - S skeleton_path : file path for skeleton file\n"); -X+ fprintf(stderr," - s : suppress echo of unmatched scanner input to stdout\n"); -X+ fprintf(stderr," - T : run flex in trace mode\n"); -X+ #ifdef ATARI -X+ fprintf(stderr," - t : place result on stdout instead of lex_yy.c\n"); -X+ #else -X+ fprintf(stderr," - t : place result on stdout instead of lex.yy.c\n"); -X+ #endif -X+ fprintf(stderr," - v : print statistics of generated scanner\n"); -X+ fprintf(stderr," default = -cem\n"); -X+ exit(status); -X+ } -X+ -X /* readin - read in the rules section of the input file(s) -X * -X * synopsis -/ -echo x - scan.l_cdiff -sed '/^X/s///' > scan.l_cdiff << '/' -X*** Src_2.1/scan.l Thu Jun 30 19:42:00 1989 -X--- scan.l Thu Jul 2 22:19:26 1989 -X*************** -X*** 125,132 **** -X -X {SCNAME} RETURNNAME; -X ^{OPTWS}\n ++linenum; /* allows blank lines in section 1 */ -X! \n ++linenum; return ( '\n' ); -X! . synerr( "illegal character" ); BEGIN(RECOVER); -X -X -X "*/" ECHO; BEGIN(0); -X--- 125,136 ---- -X -X {SCNAME} RETURNNAME; -X ^{OPTWS}\n ++linenum; /* allows blank lines in section 1 */ -X! {OPTWS}\n ++linenum; return ( '\n' ); -X! . { -X! synerr( "illegal character" ); -X! fprintf(stderr,"Char : $%x\n",yytext[yyleng-1]); -X! BEGIN(RECOVER); -X! } -X -X -X "*/" ECHO; BEGIN(0); -X*************** -X*** 206,212 **** -X ^{OPTWS}\n ++linenum; /* allow blank lines in section 2 */ -X -X /* this horrible mess of a rule matches indented lines which -X! * do not contain "/*". We need to make the distinction because -X * otherwise this rule will be taken instead of the rule which -X * matches the beginning of comments like this one -X */ -X--- 210,216 ---- -X ^{OPTWS}\n ++linenum; /* allow blank lines in section 2 */ -X -X /* this horrible mess of a rule matches indented lines which -X! * do not contain '/','*'. We need to make the distinction because -X * otherwise this rule will be taken instead of the rule which -X * matches the beginning of comments like this one -X */ -/ -echo x - Makefile.tos -sed '/^X/s///' > Makefile.tos << '/' -X# make file for "flex" tool -X -X# @(#) $Header$ (LBL) -X -X# Porting considerations: -X# -X# For System V Unix machines, add -DSYS_V to CFLAGS. -X# For Vax/VMS, add -DSYS_V to CFLAGS. -X# For MS-DOS, add "-DMS_DOS -DSYS_V" to CFLAGS. Create \tmp if not present. -X# You will also want to rename flex.skel to something with a three -X# character extension, change SKELETON_FILE below appropriately, -X# For Amiga, add "-DAMIGA -DSYS_V" to CFLAGS. -X# -X# A long time ago, flex was successfully built using Microsoft C and -X# the following options: /AL, /stack:10000, -LARGE, -Ml, -Mt128, -DSYS_V -X -X -X# the first time around use "make first_flex" -X -X# The following definitions must be set according to your compiler - -X# examples for a Lattice Compiler with GST assembler and TURBO C with -X# assembler are provided below and must just be updated (don't forget to -X# update the linker argument extension files (*.lnk,*.tlk), too) : -X# -X#CCPATH = path to compiler directory without trailing \ -X#CHPATH = path to header files without trailing \ -X#CC = filename of the compiler -X#CFLAGS = compiler option flags -X#CIEXT = extension of C sources that should be used for input filenames -X#ASMPATH = path to assembler directory without trailing \ -X#ASM = filename of the assembler -X#AFLAGS = assembler option flags -X#AIEXT = extension of assembler sources that should be used for assembler -X# input filenames -X#AEXT = general assembler filename extension -X#LNKPATH = path to linker directory without trailing \ -X#LINK = filename of the linker -X#LFLAG0 = first option (full pathname of C startupcode) -X#LFLAG1 = further options + option flag for argument extension filename -X#LFLAG2 = further options + option flag for output-filename -X#LNKEXT = extension of linker argument extension file -X#OIEXT = extension of objects that should be used for linker input files -X#OEXT = general object file extension -X -X# Lattice definitions -XCCPATH = d:\latt -XCHPATH = d:\latt\include -XCC = lc.ttp -XCFLAGS = -h -n -cw -cc -i$(CHPATH)\ -g$(CCPATH)\ -dLATTICE -dATARI -XCIEXT = -XASMPATH = d:\gst -XASM = assem.ttp -XAFLAGS = -nolist -errors errors.out -XAIEXT = -XAEXT = .asm -XLNKPATH = d:\gst -XLINK = ld.ttp -XLFLAG0 = -XLFLAG1 = -with -XLFLAG2 = -nolist -sec -mem 200 -prog -XLNKEXT = .lnk -XOIEXT = -XOEXT = .bin -X -X# Turbo definitions -X#CCPATH = d:\turbo -X#CHPATH = d:\turbo\include -X#CC = tcc.prg -X#CFLAGS = -GJMPRZ -H=$(CHPATH)\ -w- -DTURBO -DATARI -X#CIEXT = .c -X#ASMPATH = d:\turbo -X#ASM = mas.prg -X#AFLAGS = -X#AIEXT = .s -X#AEXT = .s -X#LNKPATH = d:\turbo -X#LINK = tlink.ttp -X#LFLAG0 = $(LNKPATH)\lib\tcstart.o -X#LFLAG1 = -I= -X#LFLAG2 = -O= -X#LNKEXT = .tlk -X#OIEXT = .o -X#OEXT = .o -X -X# Other definitions -X# (not used for Atari because of short argument string - defined in flexdef.h -X -XSKELETON_DIR = /usr/lib -XSKELETON_FILE = flex.skel -XSKELFLAGS = -DDEFAULT_SKELETON_FILE=\"$(SKELETON_DIR)/$(SKELETON_FILE)\" -X -X -XFLEX = d:\etc\flex.ttp -XFLEX_FLAGS = -is -XYACC = d:\etc\yacc.ttp -XRENAME = d:\bin\rename -XDEL = d:\bin\del -X -X# Internal definitions -XLNK = $(LNKPATH)\$(LINK) -X -XFLEXOBJS = \ -X ccl$(OEXT) \ -X dfa$(OEXT) \ -X ecs$(OEXT) \ -X gen$(OEXT) \ -X main$(OEXT) \ -X misc$(OEXT) \ -X nfa$(OEXT) \ -X parse$(OEXT) \ -X scan$(OEXT) \ -X sym$(OEXT) \ -X tblcmp$(OEXT) \ -X yylex$(OEXT) -X -XFLEX_C_SOURCES = \ -X ccl.c \ -X dfa.c \ -X ecs.c \ -X gen.c \ -X main.c \ -X misc.c \ -X nfa.c \ -X parse.c \ -X scan.c \ -X sym.c \ -X tblcmp.c \ -X yylex.c -X -Xflex : $(FLEXOBJS) -X $(LNK) $(LFLAG0) $(LFLAG1)flex$(LNKEXT) $(LFLAG2)flex.ttp -X -Xfirst_flex: -X cp initscan.c scan.c -X make $(MFLAGS) flex -X -Xparse.h parse.c : parse.y -X $(YACC) -d parse.y -X $(DEL) parse.c -X $(RENAME) y_tab.c parse.c -X $(DEL) parse.h -X $(RENAME) y_tab.h parse.h -X -Xscan.c : scan.l -X $(FLEX) $(FLEX_FLAGS) scan.l -X $(RENAME) lex_yy.c scan.c -X -Xscan$(OEXT) : scan.c parse.h flexdef.h -X $(CCPATH)\$(CC) $(CFLAGS) scan$(CIEXT) -X -Xmain$(OEXT) : main.c flexdef.h -X $(CCPATH)\$(CC) $(CFLAGS) main$(CIEXT) -X -Xccl$(OEXT) : ccl.c flexdef.h -X $(CCPATH)\$(CC) $(CFLAGS) ccl$(CIEXT) -X -Xdfa$(OEXT) : dfa.c flexdef.h -X $(CCPATH)\$(CC) $(CFLAGS) dfa$(CIEXT) -X -Xecs$(OEXT) : ecs.c flexdef.h -X $(CCPATH)\$(CC) $(CFLAGS) ecs$(CIEXT) -X -Xgen$(OEXT) : gen.c flexdef.h -X $(CCPATH)\$(CC) $(CFLAGS) gen$(CIEXT) -X -Xmisc$(OEXT) : misc.c flexdef.h -X $(CCPATH)\$(CC) $(CFLAGS) misc$(CIEXT) -X -Xnfa$(OEXT) : nfa.c flexdef.h -X $(CCPATH)\$(CC) $(CFLAGS) nfa$(CIEXT) -X -Xparse$(OEXT) : parse.c flexdef.h -X $(CCPATH)\$(CC) $(CFLAGS) parse$(CIEXT) -X -Xsym$(OEXT) : sym.c flexdef.h -X $(CCPATH)\$(CC) $(CFLAGS) sym$(CIEXT) -X -Xtblcmp$(OEXT) : tblcmp.c flexdef.h -X $(CCPATH)\$(CC) $(CFLAGS) tblcmp$(CIEXT) -X -Xyylex$(OEXT) : yylex.c flexdef.h -X $(CCPATH)\$(CC) $(CFLAGS) yylex$(CIEXT) -X -Xflex.man : flex.1 -X nroff -man flex.1 >flex.man -X -Xlint : $(FLEX_C_SOURCES) -X lint $(FLEX_C_SOURCES) > flex.lint -X -Xdistrib : -X mv scan.c initscan.c -X chmod 444 initscan.c -X $(MAKE) $(MFLAGS) clean -X -Xclean : -X rm -f core errs flex *$(OEXT) parse.c *.lint parse.h flex.man tags -X -Xtags : -X ctags $(FLEX_C_SOURCES) -X -Xvms : flex.man -X $(MAKE) $(MFLAGS) distrib -X -Xtest : -X $(FLEX) $(FLEX_FLAGS) scan.l -X $(RENAME) lex_yy.c scan.ctest -X cmp scan.c scan.ctest -X -/ -echo x - Readme2 -sed '/^X/s///' > Readme2 << '/' -XThe changes: (1.7.89 RAL) -X -X - Bug fix: The original flex didn't like trailing spaces in exclusive start -X condition lists ! If you add an trailing space to line 68 in scan.l -X -X "%x SECT2 SECT2PROLOG SECT3 CODEBLOCK PICKUPDEF SC CARETISBOL NUM QUOTE " -X -X you get a misleading error message: -X -X "Syntax error at line 69: bad start condition list" -X -X This bug can either be fixed in parse.y or in scan.l . I have chosen the -X last because there the fix is minimal: Just change the rule (line 128) -X -X "\n" to "{OPTWS}\n" -X -X - Enhancements: -X - new option "-?" that provides some help information about the other -X flags (main.c) -X - new option "-aTMPPATH" that allows a redefinition of the standard -X path for the temporary file (this might be rather large >200k if -X F,f options are selected). (main.c, flexdef.h (l.376)) -X - hexdump of illegal characters -- this proved to be a useful debugging -X tool especialy if invisible control characters occur which weren't -X covered by the rules. (scan.l fprintf statement line 129,...) -X -X - Patches due to TOS -X - General: TOS uses CR,LF as end of line char., Flex wants only a single -X LF as EOL char. Therefore all I/O must be translated using f* calls. -X This is done everywhere besides the YY_INPUT macro (flex.skel (scan.c), -X line 31) that uses a low level 'read'. This should be definitly changed -X to fread, so that all I/O calls occur on the same level. -X - the short action_file_name has been "flexXXXXXX.tmp", but that's too -X much for TOS,MSDOS ! I changed it to "flexXXXX.tmp" in main.c (patch -X covered by the -a option additions) -X - some compilers don't like external names that are ambiguous within -X the first 8 characters. I defined macros that change all these long -X external names to names that are unique within the first 8 characters. -X Just define SHORT_EXTERNAL_NAMES to use this feature (flexdef.h) -X - some statement changes that some compiler don't like: -X typedef *xxx[] -> typedef **xxx (flexdef.h.,l.308) -X "/*" -> '/','*' within a comment in (scan.l, l.209) -X - changed short "lexyy.c" to "lex_yy.c" what's more similar to the unix -X "lex.yy.c" (main.c). -X - a few further really compiler dependent changes provided with -X #ifdef ATARI && LATTICE res. TURBO braces. -X -X - Additional TOS only files -X - Makefile.tos: Common makefile for all TOS compilers. If you add further -X ones please email me the new makefile. -X - flex.lnk: Lattice - GST linker argument extension file -X - flex.tlk: Turbo linker argument extension file -X -X -XAdditional remarks: -X -XI didn't add a new initscan.c (= flex -ist scan.l). The current one is good -Xenough for a first compilation. With this first version of flex you can -Xrebuild your own scan.c and the final flex version ! -X -XMinix ST : -X - I had to "chmem =70000 cv" (>50000) to get flex linked -X - 'memset' (PC 1.3, EFTH40,...) is necessary -X - chmem =90000 flex may be sufficient -X -XMinix PC : -X It should be possible to port Flex to Minix PC. The current sizes of flex -X are: -X Minix ST (ACK) Lattice (TOS) Turbo (TOS) -X -X size 75300 83305 57957 -X compilation time 22' 15' 3'40" -X flex -is scan.l 1'49" 43" 30" -X -X The Minix ST size includes the bad generated code using only a subset of -X the 68000 commands, long addresses only and a huge relocation table. -X Therefore the PC size will be <64 k ! More serious is the fact that I had -X to chmem =90000 flex to get scan.l converted to scan.c . But I never saw -X a more complex lex source than scan.l -- so it should be possible to -X reduce some array sizes without limitation for all day usage. -X -X No one volunteered yet for a Minix PC port -- but if someone will try it -X I would provide him with a new scan.c and some hints. -X -XTOS: -X Don't forget to adapt the flexskel path within flexdef.h ! -X -X -/ -echo x - flex.lnk -sed '/^X/s///' > flex.lnk << '/' -X* -X* -X* linker control file for flex.ttp -X* -X* -X* -XINPUT d:\latt\lib\startup.bin -X* -XINPUT ccl.bin -XINPUT dfa.bin -XINPUT ecs.bin -XINPUT gen.bin -XINPUT misc.bin -XINPUT nfa.bin -XINPUT parse.bin -XINPUT sym.bin -XINPUT tblcmp.bin -XINPUT main.bin -XINPUT yylex.bin -XINPUT scan.bin -X* -XLIBRARY d:\latt\lib\clib.bin -X -/ -echo x - flex.tlk -sed '/^X/s///' > flex.tlk << '/' -Xccl.o -Xdfa.o -Xecs.o -Xgen.o -Xmisc.o -Xnfa.o -Xparse.o -Xsym.o -Xtblcmp.o -Xyylex.o -Xmain.o -Xscan.o -Xd:\turbo\lib\tcstdlib.lib ; standard lib -Xd:\turbo\lib\tcextlib.lib ; extended lib -Xd:\turbo\lib\tctoslib.lib ; TOS lib -Xd:\turbo\lib\tcgemlib.lib ; AES and VDI lib -X-S=200000 -/ diff --git a/commands/flex-2.5.4/MISC/Borland.old/Borland-2.4 b/commands/flex-2.5.4/MISC/Borland.old/Borland-2.4 deleted file mode 100644 index bb18909a5..000000000 --- a/commands/flex-2.5.4/MISC/Borland.old/Borland-2.4 +++ /dev/null @@ -1,419 +0,0 @@ -Received: from 128.140.1.1 by ee.lbl.gov for (8.6.9/1.43r) - id HAA01193; Thu, 29 Sep 1994 07:26:54 -0700 -Received: from larry-le0.cc.emory.edu by - emoryu1.cc.emory.edu (5.65/Emory_cc.4.0.1) via SMTP - id AA07292 ; Thu, 29 Sep 94 10:26:41 -0400 -From: tkane01@unix.cc.emory.edu (Terrence O Kane) -Received: by larry.cc.emory.edu (5.0) id AA11757; Thu, 29 Sep 1994 10:26:43 +0500 -Message-Id: <9409291426.AA11757@larry.cc.emory.edu> -Subject: patches and makefile for Borland C 4.02, flex 2.4.7 -To: vern@ee.lbl.gov -Date: Thu, 29 Sep 1994 10:26:42 -0400 (EDT) -X-Mailer: ELM [version 2.4 PL23] -Mime-Version: 1.0 -Content-Type: text/plain; charset=US-ASCII -Content-Transfer-Encoding: 7bit -Content-Length: 9900 - -Enclosed are unified diffs and a makefile for Borland 4.02 - -The changes in the enclosed are 1) make the size parameters for memory -allocation "size_t", 2) change an include file when the lexer is -compiled within 'extern "C" {...}' in a C++ file, and 3) include pragmas -in the header suitable for BCC 4.02 to hush on warnings. - -The latter is done because of the limit on command line size. A tradeoff -exists between putting pragmas in the header, or #defines in the header - -I put in the pragmas since they're suppoed to be ignored unless -understood - *and* they're enclosed in BCC specific ifdefs, anyway. - -All changes are enclosed in "#ifdef __BORLANDC__". - - - - - ---- misc.c Tue Jan 04 14:33:10 1994 -+++ ../misc.c Wed Sep 28 18:44:32 1994 -@@ -55,15 +55,19 @@ - action_index += len; - } - - - /* allocate_array - allocate memory for an integer array of the given size */ - - void *allocate_array( size, element_size ) -+#ifndef __BORLANDC__ - int size, element_size; -+#else /* __BORLANDC__ */ -+size_t size, element_size; -+#endif /* __BORLANDC__ */ - { - register void *mem; - - /* On 16-bit int machines (e.g., 80286) we might be trying to - * allocate more than a signed int can hold, and that won't - * work. Cheap test: - */ -@@ -634,15 +638,19 @@ - } - - - /* reallocate_array - increase the size of a dynamic array */ - - void *reallocate_array( array, size, element_size ) - void *array; -+#ifndef __BORLANDC__ - int size, element_size; -+#else /* __BORLANDC__ */ -+size_t size, element_size; -+#endif /* __BORLANDC__ */ - { - register void *new_array; - - /* Same worry as in allocate_array(): */ - if ( size * element_size <= 0 ) - flexfatal( - "attempt to increase array size by less than 1 byte" ); -@@ -739,15 +747,19 @@ - } - - - /* The following is only needed when building flex's parser using certain - * broken versions of bison. - */ - void *yy_flex_xmalloc( size ) -+#ifndef __BORLANDC__ - int size; -+#else /* __BORLANDC__ */ -+size_t size; -+#endif /* __BORLANDC__ */ - { - void *result = flex_alloc( size ); - - if ( ! result ) - flexfatal( "memory allocation failed in yy_flex_xmalloc()" ); - - return result; - - - - - ---- skel.c Wed Aug 03 11:38:32 1994 -+++ ../skel.c Wed Sep 28 18:50:58 1994 -@@ -26,15 +26,19 @@ - "", - "#ifdef __cplusplus", - "", - "#include ", - "%+", - "class istream;", - "%*", -+ "#ifndef __BORLANDC__", - "#include ", -+ "#else /* __BORLANDC__ */", -+ "#include ", -+ "#endif /* __BORLANDC__ */", - "", - "/* Use prototypes in function declarations. */", - "#define YY_USE_PROTOS", - "", - "/* The \"const\" storage-class-modifier is valid. */", - "#define YY_USE_CONST", - "", -@@ -240,16 +244,21 @@ - "static int yy_start_stack_depth = 0;", - "static int *yy_start_stack = 0;", - "static void yy_push_state YY_PROTO(( int new_state ));", - "static void yy_pop_state YY_PROTO(( void ));", - "static int yy_top_state YY_PROTO(( void ));", - "%*", - "", -+ "#ifndef __BORLANDC__", - "static void *yy_flex_alloc YY_PROTO(( unsigned int ));", - "static void *yy_flex_realloc YY_PROTO(( void *, unsigned int ));", -+ "#else /* __BORLANDC__ */", -+ "static void *yy_flex_alloc YY_PROTO(( size_t ));", -+ "static void *yy_flex_realloc YY_PROTO(( void *, size_t ));", -+ "#endif /* __BORLANDC__ */", - "static void yy_flex_free YY_PROTO(( void * ));", - "", - "#define yy_new_buffer yy_create_buffer", - "", - "%% yytext/yyin/yyout/yy_state_type/yylineno etc. def's & init go here", - "", - "#ifndef yytext_ptr", - - - - - ---- initscan.c Wed Aug 03 11:42:46 1994 -+++ ../initscan.c Wed Sep 28 18:51:34 1994 -@@ -16,15 +16,19 @@ - #endif - #endif - - - #ifdef __cplusplus - - #include -+#ifndef __BORLANDC__ - #include -+#else /* __BORLANDC__ */ -+#include -+#endif /* __BORLANDC__ */ - - /* Use prototypes in function declarations. */ - #define YY_USE_PROTOS - - /* The "const" storage-class-modifier is valid. */ - #define YY_USE_CONST - -@@ -220,16 +224,21 @@ - static int yy_start_stack_ptr = 0; - static int yy_start_stack_depth = 0; - static int *yy_start_stack = 0; - static void yy_push_state YY_PROTO(( int new_state )); - static void yy_pop_state YY_PROTO(( void )); - static int yy_top_state YY_PROTO(( void )); - -+#ifndef __BORLANDC__ - static void *yy_flex_alloc YY_PROTO(( unsigned int )); - static void *yy_flex_realloc YY_PROTO(( void *, unsigned int )); -+#else /* __BORLANDC__ */ -+static void *yy_flex_alloc YY_PROTO(( size_t )); -+static void *yy_flex_realloc YY_PROTO(( void *, size_t )); -+#endif /* __BORLANDC__ */ - static void yy_flex_free YY_PROTO(( void * )); - - #define yy_new_buffer yy_create_buffer - - #define INITIAL 0 - #define SECT2 1 - #define SECT2PROLOG 2 - - - - - ---- flexdef.h Tue Jan 04 14:33:14 1994 -+++ ../flexdef.h Wed Sep 28 18:53:44 1994 -@@ -27,14 +27,25 @@ - */ - - /* @(#) $Header$ (LBL) */ - - #include - #include - -+#ifdef __BORLANDC__ -+#include -+ -+#pragma warn -pro -+#pragma warn -rch -+#pragma warn -use -+#pragma warn -aus -+#pragma warn -par -+#pragma warn -pia -+ -+#endif /* __BORLANDC__ */ - #if HAVE_STRING_H - #include - #else - #include - #endif - - #if __STDC__ -@@ -607,19 +618,29 @@ - */ - - extern char nmstr[MAXLINE]; - extern int sectnum, nummt, hshcol, dfaeql, numeps, eps2, num_reallocs; - extern int tmpuses, totnst, peakpairs, numuniq, numdup, hshsave; - extern int num_backing_up, bol_needed; - -+#ifndef __BORLANDC__ - void *allocate_array PROTO((int, int)); - void *reallocate_array PROTO((void*, int, int)); -+#else /* __BORLANDC__ */ -+void *allocate_array PROTO((size_t, size_t)); -+void *reallocate_array PROTO((void*, size_t, size_t)); -+#endif /* __BORLANDC__ */ - -+#ifndef __BORLANDC__ - void *flex_alloc PROTO((unsigned int)); - void *flex_realloc PROTO((void*, unsigned int)); -+#else /* __BORLANDC__ */ -+void *flex_alloc PROTO((size_t)); -+void *flex_realloc PROTO((void*, size_t)); -+#endif /* __BORLANDC__ */ - void flex_free PROTO((void*)); - - #define allocate_integer_array(size) \ - (int *) allocate_array( size, sizeof( int ) ) - - #define reallocate_integer_array(array,size) \ - (int *) reallocate_array( (void *) array, size, sizeof( int ) ) -@@ -772,15 +793,19 @@ - /* Write out one section of the skeleton file. */ - extern void skelout PROTO((void)); - - /* Output a yy_trans_info structure. */ - extern void transition_struct_out PROTO((int, int)); - - /* Only needed when using certain broken versions of bison to build parse.c. */ -+#ifndef __BORLANDC__ - extern void *yy_flex_xmalloc PROTO(( int )); -+#else /* __BORLANDC__ */ -+extern void *yy_flex_xmalloc PROTO(( size_t )); -+#endif /* __BORLANDC__ */ - - /* Set a region of memory to 0. */ - extern void zero_out PROTO((char *, int)); - - - /* from file nfa.c */ - - - - - -############################################################################### -# Makefile for flex 2.4.7 with Borland C/C++ version 4.02 -# -# This will probably need to be adjusted for your existing lexer/parser -# generators. See definitions for FLEX and YACC near the bottom of the -# makefile. -# -# Copy initscan.c to scan.c to make your first executable. After that, -# you may choose to try alternate compression options for your everyday -# flex executable. -# -# This will build flex with the large model. Don't use huge, but if you -# feel like experimenting with other models, post your success stories to -# comp.compilers, OK? -# -# This makefile does *not* implement the big testing found in "makefile.in". -# -# I also assume the availability of sed and the gnu file utilities on the -# system - they're readily available, so if you don't have them, why not? -# -# -# The resulting generated lexer (the real goal, right?) will compile -# (and run nicely, too) as a .c file, as well as being included such as -# extern "C" { #include "lexyyc" } in a .cplusplus file. -# -############################################################################### - -DEBUG = 1 - -.autodepend - -all: flex.exe - -############################################################################### -# -# standard utilitities? ha. -# - -CC = bcc -CPP = bcc - -############################################################################### -# - -MODEL = l - -!if $(DEBUG) == 1 -!message Building with debug. -debugCompile = -v -debugLink = /v -!else -!message Building without debug. -debugCompile = -debugLink = -!endif - -LOADER = c0$(MODEL).obj -LIBS = c$(MODEL).lib -LINKFLAGS = $(debugLink) - -DATASEG = -dc -Ff -SizeOPT = -Os -G- -Defines = -DSHORT_FILE_NAMES=1 -DHAVE_STRING_H=1 - -COMMON = -A -c -m$(MODEL) $(SizeOPT) $(DATASEG) $(Defines) $(debugCompile) -CFLAGS = -o$@ $(COMMON) -CCFLAGS = -o$@ $(COMMON) -Pcc - -############################################################################### - -.SUFFIXES: .cc - -.cc.obj: - $(CPP) $(CCFLAGS) $< - -.c.obj: - $(CPP) $(CFLAGS) $< - -############################################################################### -# -# source & object files -# - -SRC = ccl.c dfa.c ecs.c gen.c main.c misc.c nfa.c parse.c \ - scan.c sym.c tblcmp.c yylex.c skel.c - -OBJS = $(SRC:.c=.obj) - -objects: $(OBJS) - @echo $(OBJS) - -############################################################################### -# -# Executable -# - -flex.exe: $(OBJS) - tlink $(LINKFLAGS) @&&! -$(LOADER) $** -$&.exe -$&.map -$(LIBS) -! - -# -############################################################################### -# -# Lex files -# - -FLEX = .\flex -FLEX_FLAGS = -ist - -scan.c: scan.l - $(FLEX) $(FLEX_FLAGS) scan.l >scan.tmp - sed s,\"$(srcdir)/scan.l\",\"scan.l\", scan.c - @rm scan.tmp - -############################################################################### -# -# YACC files -# - -YACC = .\bison -YFLAGS = -vdyl - -parse.c: parse.y - $(YACC) -ydl parse.y - @sed "/extern char.*malloc/d" parse.c - @rm -f y_tab.c - @mv y_tab.h parse.h - -# -# end Makefile -# -############################################################################### - diff --git a/commands/flex-2.5.4/MISC/Borland.old/Turbo-C b/commands/flex-2.5.4/MISC/Borland.old/Turbo-C deleted file mode 100644 index c15ee6783..000000000 --- a/commands/flex-2.5.4/MISC/Borland.old/Turbo-C +++ /dev/null @@ -1,179 +0,0 @@ -Received: from 128.84.254.220 by ee.lbl.gov for (8.6.8.1/1.43r) - id PAA27266; Mon, 18 Apr 1994 15:08:26 -0700 -Received: from CLOYD.CS.CORNELL.EDU by thialfi.cs.cornell.edu (5.67/I-1.99E) - id AA28742; Mon, 18 Apr 94 18:08:14 -0400 -Received: from iraun1.ira.uka.de by cloyd.cs.cornell.edu (5.67/I-1.99D) - id AA19613; Mon, 18 Apr 94 18:08:19 -0400 -Received: from t500i2.telematik.informatik. (actually t500i2.telematik.informatik.uni-karlsruhe.de) - by iraun1.ira.uka.de with SMTP (PP); Tue, 19 Apr 1994 00:07:55 +0200 -Received: by t500i2.telematik.informatik.uni-karlsruhe.de (5.57/Ultrix3.0-C) - id AA10269; Tue, 19 Apr 94 00:09:14 +0200 -From: beigl@t500i2.telematik.informatik.uni-karlsruhe.de (Michael Beigl) -Message-Id: <9404182209.AA10269@t500i2.telematik.informatik.uni-karlsruhe.de> -Subject: Makefile-TurboC -To: vern@cs.cornell.edu -Date: Tue, 19 Apr 1994 00:09:13 +0200 (MET DST) -X-Mailer: ELM [version 2.4 PL22] -Mime-Version: 1.0 -Content-Type: text/plain; charset=US-ASCII -Content-Transfer-Encoding: 7bit -Content-Length: 2739 - -Hello - -Here are some additional adjustments to my Makefile. I was using "pure" DOS -and an old Turbo C++ 1.0 version, so I had some problems with systemtools -like mv etc. and problems with variables in my Makefile. - -Now follows my Makefile -############################################################################ -# make file for "flex" tool - -# @(#) $Header$ (LBL) - -# Porting considerations: -# -# For BSD machines: -# CFLAGS = -# LDFLAGS = -s -# LINK = $(CC) $(CFLAGS) -o flex $(LDFLAGS) $(FLEXOBJS) -# SKELETON_DIR = . -# SKELETON_FILE = flex.skel -# SKELFLAGS = -DDEFAULT_SKELETON_FILE=\"$(SKELETON_DIR)/$(SKELETON_FILE)\" -# O = o -# YTAB = y.tab -# FLEX = ./flex -# -# For System V Unix or Vax/VMS machines, merely add: -# CFLAGS = -DSYS_V -# -# For MS-DOS, Turbo C: -CC = tcc -# -2+ 286 Options -CFLAGS = -DSYS_V -DMS_DOS -O -G -Z -ml -v -2 -# /3 enable 32 bit processing -# /ye expanded memory swapping -# /yx extended memory swapping -LINK = tlink @flex.lnk/c/x/v/3/ye -SKELETON_DIR = . -SKELETON_FILE = flex.skl -SKELFLAGS = -DDEFAULT_SKELETON_FILE="$(SKELETON_DIR)/$(SKELETON_FILE)" -O = obj -EXE = .exe -YTAB = y_tab -FLEX = flex -YACC = /yacc/byacc - -# -# the first time around use "make first_flex" -# - -FLEX_FLAGS = - -FLEXOBJS = \ - ccl.$O \ - dfa.$O \ - ecs.$O \ - gen.$O \ - main.$O \ - misc.$O \ - nfa.$O \ - parse.$O \ - scan.$O \ - sym.$O \ - tblcmp.$O \ - yylex.$O - -FLEX_C_SOURCES = \ - ccl.c \ - dfa.c \ - ecs.c \ - gen.c \ - main.c \ - misc.c \ - nfa.c \ - parse.c \ - scan.c \ - sym.c \ - tblcmp.c \ - yylex.c - -FLEX_C_SOURCES_1 = \ - ccl.c \ - dfa.c \ - ecs.c \ - gen.c \ - main.c \ - misc.c - -FLEX_C_SOURCES_2 = \ - nfa.c \ - parse.c \ - scan.c \ - sym.c \ - tblcmp.c \ - yylex.c - -flex.exe: $(FLEXOBJS) - $(LINK) - - -flex: $(FLEX_C_SOURCES) - $(CC) $(CFLAGS) -c $(SKELFLAGS) $(FLEX_C_SOURCES_1) - $(CC) $(CFLAGS) -c $(SKELFLAGS) $(FLEX_C_SOURCES_2) - $(LINK) - - -first_flex: - copy initscan.c scan.c - $(MAKE) flex - -parse.h parse.c: parse.y - $(YACC) -d parse.y - @rename $(YTAB).c parse.c - @rename $(YTAB).h parse.h - -scan.c: scan.l - $(FLEX) -ist $(FLEX_FLAGS) scan.l >scan.c - -scan.$O: scan.c parse.h - -main.$O: main.c - $(CC) $(CFLAGS) -c $(SKELFLAGS) main.c - -flex.man: flex.1 - nroff -man flex.1 >flex.man - -lint: $(FLEX_C_SOURCES) - lint $(FLEX_C_SOURCES) > flex.lint - -distrib: - rename scan.c initscan.c - attrib +R -A -H -S initscan.c - $(MAKE) clean - -clean: - del *.obj - del *.lint - del core - del errs - del flex.exe - del parse.c - del parse.h - del flex.man - del tags - -tags: - ctags $(FLEX_C_SOURCES) - -vms: flex.man - $(MAKE) distrib - -test: - $(FLEX) -ist $(FLEX_FLAGS) scan.l | diff scan.c - - -############################################################################ - -I think this Makefile will help some other simple DOS user - - M. Beigl diff --git a/commands/flex-2.5.4/MISC/Borland/Makefile b/commands/flex-2.5.4/MISC/Borland/Makefile deleted file mode 100644 index 3b2009098..000000000 --- a/commands/flex-2.5.4/MISC/Borland/Makefile +++ /dev/null @@ -1,163 +0,0 @@ -############################################################################### -# Makefile for flex 2.5.0.6 (beta) with Borland C/C++ version 4.02 -# -# This will probably need to be adjusted for your existing lexer/parser -# generators. See definitions for FLEX and YACC near the bottom of the -# makefile. -# -# This makefile builds initflex.exe and flex.exe by default. It -# removes initflex.exe after making flex.exe. After that, you may -# choose to try alternate compression options for your everyday flex -# executable. -# -# This will build flex with the large model. Don't use huge, but if you -# feel like experimenting with other models, post your success stories to -# comp.compilers, OK? -# -# This makefile does *not* implement the big testing found in "makefile.in". -# -# I also assume the availability of sed and the gnu file utilities on the -# system - they're readily available, so if you don't have them, why not? -# -# -# The resulting generated lexer (the real goal, right?) will compile -# (and run nicely, too) as a .c file, as well as being included such as -# extern "C" { #include "lexyyc" } in a .cplusplus file. -# -############################################################################### - -DEBUG = 1 - -.autodepend - -all: initflex.exe flex.exe - rm initflex.exe initflex.map - -############################################################################### -# -# standard utilitities? ha. -# - -CC = bcc -CPP = bcc - -############################################################################### -# - -MODEL = l - -!if $(DEBUG) == 1 -!message Building with debug. -debugCompile = -v -debugLink = /v -!else -!message Building without debug. -debugCompile = -debugLink = -!endif - -LOADER = c0$(MODEL).obj -LIBS = c$(MODEL).lib -LINKFLAGS = $(debugLink) - -DATASEG = -dc -Ff -SizeOPT = -Os -G- -Defines = - -COMMON = -A -c -m$(MODEL) $(SizeOPT) $(DATASEG) $(Defines) $(debugCompile) -CFLAGS = -o$@ $(COMMON) -CCFLAGS = -o$@ $(COMMON) -Pcc - -############################################################################### - -.SUFFIXES: .cc - -.cc.obj: - $(CPP) $(CCFLAGS) $< - -.c.obj: - $(CPP) $(CFLAGS) $< - -############################################################################### -# -# source & object files -# - -BASESRC = ccl.c dfa.c ecs.c gen.c main.c misc.c nfa.c parse.c \ - sym.c tblcmp.c yylex.c skel.c - -INITSRC = $(BASESRC) initscan.c - -INITOBJS = $(INITSRC:.c=.obj) - -SRC = $(BASESRC) scan.c - -OBJS = $(SRC:.c=.obj) - -objects: $(OBJS) - @echo $(OBJS) - -############################################################################### -# -# Executable -# - -initflex.exe: $(INITOBJS) - tlink $(LINKFLAGS) @&&! -$(LOADER) $** -$&.exe - -$(LIBS) -! - -flex.exe: $(OBJS) - tlink $(LINKFLAGS) @&&! -$(LOADER) $** -$&.exe - -$(LIBS) -! - -# -############################################################################### -# -# Lex files -# - -FLEX = .\initflex -FLEX_FLAGS = -ist - -scan.c: scan.l - $(FLEX) $(FLEX_FLAGS) scan.l >scan.tmp - sed s,\"$(srcdir)/scan.l\",\"scan.l\", scan.c - @rm scan.tmp - -############################################################################### -# -# YACC files -# - -YACC = .\bison -YFLAGS = -vdyl - -parse.c: parse.y - $(YACC) -ydl parse.y - @sed "/extern char.*malloc/d" parse.c - @rm -f y_tab.c - @mv y_tab.h parse.h - -############################################################################### -# -# cleanup -# - -clean: - -rm *.obj *.map initflex.exe - -realclean: clean - -rm flex.exe - -# -# end Makefile -# -############################################################################### diff --git a/commands/flex-2.5.4/MISC/Borland/NOTES b/commands/flex-2.5.4/MISC/Borland/NOTES deleted file mode 100644 index caac3cc99..000000000 --- a/commands/flex-2.5.4/MISC/Borland/NOTES +++ /dev/null @@ -1,66 +0,0 @@ -Received: from 128.140.1.1 by ee.lbl.gov for (8.6.9/1.43r) - id PAA03966; Tue, 24 Jan 1995 15:03:57 -0800 -Received: from larry-le0.cc.emory.edu by - emoryu1.cc.emory.edu (5.65/Emory_cc.4.0.1) via SMTP - id AA24158 ; Tue, 24 Jan 95 17:18:18 -0500 -From: tkane01@unix.cc.emory.edu (Terrence O Kane) -Received: by larry.cc.emory.edu (5.0) id AA21979; Tue, 24 Jan 1995 17:17:40 -0500 -Message-Id: <9501242217.AA21979@larry.cc.emory.edu> -Subject: Re: Beta test for DOS -To: vern@ee.lbl.gov (Vern Paxson) -Date: Tue, 24 Jan 1995 17:17:38 -0500 (EST) -In-Reply-To: <199501232138.NAA11430@daffy.ee.lbl.gov> from "Vern Paxson" at Jan 23, 95 01:38:02 pm -X-Mailer: ELM [version 2.4 PL23] -Mime-Version: 1.0 -Content-Type: text/plain; charset=US-ASCII -Content-Transfer-Encoding: 7bit -Content-Length: 5792 - -Vern, - -I've made flex 2.5.0.6 successfully with no changes to the source -code at all. I'm including the Borland 4.02 makefile and config.h -at the end of this message. - -When you're ready for release, I'll be happy to take care of getting -the appropriate archive files up to Simtel if you wish. - -I have not used this version for any of my "work-related" scanners -yet, but have run the fastwc benchmark. The compiles were for large -memory model and optimization for fastest possible code. The test -machine was a Pentium-90 (hey! timing output was integer!) with -enhanced IDE on a PCI bus and no file system caching. I ran the -test on two different input files. - -(Times are in seconds.) - -The first input was a typical postscript file concatenated 10 times; -by typical, I mean that there were relatively few spaces, lots of lines -with no space, using lots of parentheses. - - lines words characters - 91200 356260 5889240 - - mywc 8.89 - wc1s 15.22 default - wc1 10.82 -Cf - wc2 10.16 -Cf - wc3 9.17 -Cf - wc4 9.22 -Cf - wc5 10.98 -Cf - -The second test run was on a file that consisted of 20 concatenations -of 'misc/flex.man'. - - lines words characters - 69960 305140 2399960 - - mywc 4.01 - wc1s 6.87 - wc1 5.32 - wc2 4.95 - wc3 4.12 - wc4 4.12 - wc5 5.05 - -[[Makefile and config.h moved to separate files -VP]] diff --git a/commands/flex-2.5.4/MISC/Borland/config.h b/commands/flex-2.5.4/MISC/Borland/config.h deleted file mode 100644 index 256dd7a47..000000000 --- a/commands/flex-2.5.4/MISC/Borland/config.h +++ /dev/null @@ -1,29 +0,0 @@ -/* $Header$ */ -/* ------------------------------------------------ */ -/* version of config.h for Borland C/C++ v4.02 */ -/* flex version 2.5.0.6 (beta) */ -/* ------------------------------------------------ */ - -/* Define to empty if the keyword does not work. */ -#undef const - -/* Define to `unsigned' if doesn't define. */ -#undef size_t - -/* Define if you have the ANSI C header files. */ -#define STDC_HEADERS 1 - -/* Define if you have the header file. */ -#define HAVE_MALLOC_H 1 - -/* Define if you have the header file. */ -#define HAVE_STRING_H 1 - -/* Define if you have the header file. */ -#define HAVE_SYS_TYPES_H 1 - -/* Define if you have and it should be used (not on Ultrix). */ -#undef HAVE_ALLOCA_H - -/* Define if platform-specific command line handling is necessary. */ -#undef NEED_ARGV_FIXUP diff --git a/commands/flex-2.5.4/MISC/EBCDIC b/commands/flex-2.5.4/MISC/EBCDIC deleted file mode 100644 index e4ebd716a..000000000 --- a/commands/flex-2.5.4/MISC/EBCDIC +++ /dev/null @@ -1,48 +0,0 @@ -Return-Path: Mark_Ganter@liz.com -Received: from 192.216.61.11 by horse.ee.lbl.gov for vern (5.65/1.43r) - id AA02152; Tue, 11 Jan 94 06:19:36 -0800 -Received: from melonville.radiomail.net (mayberry.radiomail.net) by radiomail.net with SMTP id AA20220 - (5.65c+/IDA-1.4.4 for ); Tue, 11 Jan 1994 06:19:35 -0800 -Message-Id: <199401111419.AA20220@radiomail.net> -Received: from liz.com by melonville.radiomail.net with CCGW-1.7(930217); - Tue, 11 Jan 94 06:19:17 -From: Mark_Ganter@liz.com -Date: 11 Jan 94 09:05 -To: vern@horse.ee.lbl.gov -Subject: Re[2]: Flex on an AS400 - - I have no problem at all with being a contact for advice - on porting Flex to EBCDIC. The code was put on an AS400, so - filing the message under /MISC/AS400 is more appropriate. - The port was an interesting, very educational experience. - Thanks again. - - - Mark - ------------------------------------------------------------------------- -Date: Tue, 18 Apr 1995 12:33:48 -0400 -To: "Michael W. Duffy" , Mark_Ganter@liz.com, - vern@ee.lbl.gov (Vern Paxson), slayten@cas.org -From: slayten@cas.org (Steve Layten) -Subject: RE: Porting LEX scanner on EBCDIC machine -X-Mailer: -Content-Length: 918 - -I came in late on this discussion - I don't follow comp.compilers very -closely these days because my job has shifted somewhat. - -I ported (quite some time ago) flex 2.3.6 to an IBM 3090 under MVS, using -the SAS C compiler. The approach I used was, as Vern suggested, was to -translate the tables to reflect EBCDIC-based indices. I haven't even -downloaded flex 2.4 yet, so I don't know what's in the current distribution. -My patches were in the flex 2.3 distribution for a while in the MISC -directory. If you want any more info feel free to drop me a line - I still -have (somewhere) the patches that I created from version 2.3.6. - -Steve Layten --- -Steven W. Layten, Senior Research Scientist -Chemical Abstracts Service PO BOX 3012, Columbus, OH 43210 +1 614 447 3600 -INET: slayten@cas.org FAX: +1 614 447 3813 -# # Speaking only for myself, and NOT for Chemical Abstracts Service! # # # diff --git a/commands/flex-2.5.4/MISC/MSDOS/MSC70.make b/commands/flex-2.5.4/MISC/MSDOS/MSC70.make deleted file mode 100644 index 5980f3a61..000000000 --- a/commands/flex-2.5.4/MISC/MSDOS/MSC70.make +++ /dev/null @@ -1,115 +0,0 @@ -# -# make file for "flex" tool -# @(#) $Header: /usr/fsys/odin/a/vern/flex/RCS/Makefile,v 2.9 90/05/26 17:28:44 - vern Exp $ (LBL) -# -# the first time around use "make f_flex" -# -# This makefile is specific for Microsoft's C/C++ compiler (v7), nmake and -# lib -# - Paul Stuart, Jan 93 (pjs@scammell.ecos.tne.oz.au) -# - - -SKELFLAGS = -DDEFAULT_SKELETON_FILE=\"c:/src/flex/flex.skl\" -CFLAGS = -nologo -AL -W2 -F 8000 -Ox -Gt16000 -DMS_DOS -DUSG -LDFLAGS = /nologo /NOI /BATCH /ONERROR:NOEXE /STACK:8000 -FLEX_FLAGS = -ist8 -Sflex.skl - -FLEX = .\flex.exe -CC = cl -YACC = c:\lib\byacc -MAKE = nmake /nologo - -# -# break obj-list into two because of 128 character command-line limit of -# Microsoft's link and lib utilities. -# -FLEXOBJS1 = \ - ccl.obj \ - dfa.obj \ - ecs.obj \ - gen.obj \ - main.obj \ - misc.obj \ - nfa.obj \ - parse.obj - -FLEXOBJS2 = \ - scan.obj \ - sym.obj \ - tblcmp.obj \ - yylex.obj - -FLEX_C_SOURCES = \ - ccl.c \ - dfa.c \ - ecs.c \ - gen.c \ - main.c \ - misc.c \ - nfa.c \ - parse.c \ - scan.c \ - sym.c \ - tblcmp.c \ - yylex.c - -FLEX_LIB_OBJS = \ - libmain.obj - - -all : flex.exe - -# -# lib is used to get around the 128 character command-line limit of 'link'. -# -flex.exe : $(FLEXOBJS1) $(FLEXOBJS2) - lib /nologo tmplib $(FLEXOBJS1); - link $(LDFLAGS) $(FLEXOBJS2),$*.exe,,tmplib; - del tmplib.lib - -f_flex: - copy initscan.c scan.c - touch scan.c - @echo compiling first flex - $(MAKE) flex.exe - del scan.c - @echo using first flex to generate final version... - $(MAKE) flex.exe - -# -# general inference rule -# -.c.obj: - $(CC) -c $(CFLAGS) $*.c - -parse.h parse.c : parse.y - $(YACC) -d parse.y - @mv y_tab.c parse.c - @mv y_tab.h parse.h - -scan.c : scan.l - $(FLEX) $(FLEX_FLAGS) $(COMPRESSION) scan.l >scan.c - - -scan.obj : scan.c parse.h flexdef.h - -main.obj : main.c flexdef.h - $(CC) $(CFLAGS) -c $(SKELFLAGS) main.c - -ccl.obj : ccl.c flexdef.h -dfa.obj : dfa.c flexdef.h -ecs.obj : ecs.c flexdef.h -gen.obj : gen.c flexdef.h -misc.obj : misc.c flexdef.h -nfa.obj : nfa.c flexdef.h -parse.obj : parse.c flexdef.h -sym.obj : sym.c flexdef.h -tblcmp.obj : tblcmp.c flexdef.h -yylex.obj : yylex.c flexdef.h - - -clean : - del *.obj - del *.map diff --git a/commands/flex-2.5.4/MISC/MSDOS/configur.bat b/commands/flex-2.5.4/MISC/MSDOS/configur.bat deleted file mode 100644 index dbea0e467..000000000 --- a/commands/flex-2.5.4/MISC/MSDOS/configur.bat +++ /dev/null @@ -1,6 +0,0 @@ -@echo off - -sed -e "s/y\.tab\./parse_tab\./" -e "/sed/ s/'/\"/g" < Makefile.in > Makefile -sed -f MISC/MSDOS/djgpp.sed Makefile.in > Makefile - -update initscan.c scan.c diff --git a/commands/flex-2.5.4/MISC/MSDOS/djgpp.sed b/commands/flex-2.5.4/MISC/MSDOS/djgpp.sed deleted file mode 100644 index b436113b0..000000000 --- a/commands/flex-2.5.4/MISC/MSDOS/djgpp.sed +++ /dev/null @@ -1,12 +0,0 @@ -s/y\.tab\./parse_tab\./ -s/@DEFS@/-DMS_DOS/ -s/@LIBS@// -s/@srcdir@/./ -s/@YACC@/bison/ -s/@CC@/gcc/ -s/@RANLIB@/ranlib/ -s/@ALLOCA@// -/^flex/ s/\.bootstrap// -/sed.*extern.*malloc/ c\ - @mv parse_tab.c parse.c -/rm.*parse_tab.c/ d diff --git a/commands/flex-2.5.4/MISC/MVS/MVS.mail b/commands/flex-2.5.4/MISC/MVS/MVS.mail deleted file mode 100644 index 5a75e5b57..000000000 --- a/commands/flex-2.5.4/MISC/MVS/MVS.mail +++ /dev/null @@ -1,56 +0,0 @@ -(Message inbox:40) -Date: Tue, 17 Jul 1990 11:56 EDT -From: swl26%CAS.BITNET@CORNELLC.cit.cornell.edu -Subject: Re(2): port of flex-2.3 to IBM/MVS -To: vern@cs.cornell.edu - ->Message received. I'm sending this response to ->swl26%CAS.BITNET@CORNELLC.cit.cornell.edu. - -Great -- we can talk. - ->How extensive are the diffs? If they're fairly short then yes, please ->send them. If they're pretty involved then probably not, as I'm not aware ->of many MVS flex users ... - -I've built a context diff file which is ~850 lines. - -Summary of major changes necessary: - - o a new initscan.c -- because MVS is ebcdic, the initial scanner had - to be changed. I built a scanner from scan.l using -Ce, then - hand-manipulated the yy_ec table to fit EBCDIC instead of ASCII - chars. (This is not included in the diff file above.) - - o changes in main and flexdef.h to change how files are handled. (No - dynamic file names, etc.) - - o Some lines had to be shortened to 80 bytes. This mostly impacted - your RCSID lines, which with the full path name were too long. - - o SASC and the linker don't allow externals to be longer than 8 chars. - I thus wrote a Q&D program to shorten all externals. (This would be - a separate file 'fixit.l', which is not included in the diffs.) - - o There are several places where there are tests for 'isascii' (which I - deleted conditionally, using #ifdefs), and tests for 'A' <= x <= 'Z' - which I changed to 'isupper'. - -Many of the changes I've incorporated without impacting other systems. -Others are with 'ifdefs'. Still others (the short external names and new -initscan) are 'isolable' as separate files which would have to be -included with a distribution. - -Obviously, you are not going to want to (even if you can :-) ) worry about -testing new versions in the MVS environment. Likewise, I don't have the -time or resources to provide much support. (I'm not sure my management -would allow any :-( ) - -With all of the above feel free to say "Thanks, but no thanks." If you -want to see the diffs anyway, I will certainly mail them. - -Thanks for your time and efforts. - -Steve Layten -Chemical Abstracts Service, PO Box 3012, Columbus, OH 43210, +1 614 421-3600 -INET: swl26%cas.BITNET@CUNYVM.CUNY.Edu diff --git a/commands/flex-2.5.4/MISC/MVS/MVS.todo b/commands/flex-2.5.4/MISC/MVS/MVS.todo deleted file mode 100644 index b6060eca4..000000000 --- a/commands/flex-2.5.4/MISC/MVS/MVS.todo +++ /dev/null @@ -1,23 +0,0 @@ -(Message inbox:47) -Date: Wed, 18 Jul 1990 14:16 EDT -From: swl26%CAS.BITNET@CORNELLC.cit.cornell.edu -Subject: Re(2): Re(2): diffs for mvs port of flex-2.3 -To: vern@cs.cornell.edu - - - ->Thanks, I've successfully unpacked the archive. I may simply distribute ->the diffs as a set of files in the MISC/ directory rather than incorporating ->them into the 2.4 release. Let me know if you don't want me to do so. -> -> Vern - - -Thank you! What you propose is okay. I might suggest, however, that you -look in the diffs for dfa.c, misc.c, and yylex.c, and consider removing -some of the ASCIIisms which are probably unnecessary. The manner in -which I made the changes was pure brute force, and there might be a -better way, but the changes I made there shouldn't hurt anything. - - regards, - Steve diff --git a/commands/flex-2.5.4/MISC/MVS/MVS.uudecode b/commands/flex-2.5.4/MISC/MVS/MVS.uudecode deleted file mode 100644 index 2b8e802ae..000000000 --- a/commands/flex-2.5.4/MISC/MVS/MVS.uudecode +++ /dev/null @@ -1,341 +0,0 @@ -Received: from CU-ARPA.CS.CORNELL.EDU by loki.cs.cornell.edu (5.61/I-1.91f) - id AA25874; Wed, 18 Jul 90 12:02:22 -0400 -Message-Id: <9007181320.AA24810@cu-arpa.cs.cornell.edu> -Received: from CORNELLC.CIT.CORNELL.EDU by cu-arpa.cs.cornell.edu (5.61+2/1.91d) - id AA24810; Wed, 18 Jul 90 09:20:21 -0400 -Received: from CORNELLC by CORNELLC.cit.cornell.edu (IBM VM SMTP R1.2.1MX) with BSMTP id 6769; Wed, 18 Jul 90 09:18:46 EDT -Received: from CAS.BITNET (MAILER) by CORNELLC (Mailer R2.05X) with BSMTP id - 5378; Wed, 18 Jul 90 09:18:38 EDT -From: swl26%CAS.BITNET@CORNELLC.cit.cornell.edu -Date: Wed, 18 Jul 1990 09:16 EDT -Subject: Re(2): diffs for mvs port of flex-2.3 -In-Reply-To: Your message of Tue, 17 Jul 90 17:42:3 -To: vern@cs.cornell.edu - -Sorry about the trailing blank problem. It's farily common with data sent -through bitnet paths, but ever the optimist ... - ->I think there should be an 'M' at the beginning of the second line. - -This isn't a problem. I believe that the first byte of the line indicates -it's length (in some manner). - -Rather than re-send the data, how about a uudecode that compensates for -the trailing blank problem? I manually mangled the uuencoded file and ran -the following decode, and it seemed to work. - -#! /bin/sh -# This is a shell archive. Remove anything before this line, then feed it -# into a shell via "sh file" or similar. To overwrite existing files, -# type "sh file -c". -# The tool that generated this appeared in the comp.sources.unix newsgroup; -# send mail to comp-sources-unix@uunet.uu.net if you want that tool. -# If this archive is complete, you will see the following message at the end: -# "End of shell archive." -# Contents: uudecode.c -# Wrapped by swl26@swl26aws on Wed Jul 18 08:59:24 1990 -PATH=/bin:/usr/bin:/usr/ucb ; export PATH -if test -f 'uudecode.c' -a "${1}" != "-c" ; then - echo shar: Will not clobber existing file \"'uudecode.c'\" -else -echo shar: Extracting \"'uudecode.c'\" \(6418 characters\) -sed "s/^X//" >'uudecode.c' <<'END_OF_FILE' -X/* #ifndef lint -Xstatic char sccsid[] = "@(#)uudecode.c 5.3-1 (Berkeley) 9/1/87"; -X#endif */ -X -X/* Written by Mark Horton */ -X/* Modified by ajr (Alan J Rosenthatl,flaps@utcsri.UUCP) to use checksums */ -X/* Modified by fnf (Fred Fish,well!fnf) to use Keith Pyle's suggestion for -X compatibility */ -X/* Modified by bcn (Bryce Nesbitt,ucbvax!cogsci!bryce) to fix a misleading -X error message on the Amiga port, to fix a bug that prevented decoding -X certain files, to work even if trailing spaces have been removed from a -X file, to check the filesize (if present), to add some error checking, to -X loop for multiple decodes from a single file, and to handle common -X BITNET mangling. Also kludged around a missing string function in Aztec -X C */ -X -X/* -X * uudecode [input] -X * -X * Decode a file encoded with uuencode. WIll extract multiple encoded -X * modules from a single file. Can deal with most mangled files, including -X * BITNET. -X */ -X -X#include -X#include -X -X#ifdef AMIGA -X#define AMIGA_LATTICE /* Set for Amiga Lattice C */ -X#define MCH_AMIGA -X#define MPU68000 -X#endif -X -X#ifdef unix -X#include -X#include -X#include -X#endif -X -X#define SUMSIZE 64 -X#define DEC(c) (((c) - ' ') & 077) /* single character decode */ -X -Xmain(argc, argv) -Xchar **argv; -X{ -XFILE *in, *out; -Xint through_loop=0; /* Dejavu indicator */ -Xint mode; /* file's mode (from header) */ -Xlong filesize; /* theoretical file size (from header) */ -Xchar dest[128]; -Xchar buf[80]; -X -X#ifdef AMIGA_LATTICE -Xextern int Enable_Abort; -X Enable_Abort=1; -X#endif -X -X /* A filename can be specified to be uudecoded, or nothing can -X be specified, and the input will come from STDIN */ -X -X switch (argc) -X { -X case 1: -X in=stdin; -X break; -X -X case 2: -X if ((in = fopen(argv[1], "r")) == NULL) -X { -X fprintf(stderr, "ERROR: can't find %s\n", argv[1]); -X fprintf(stderr, "USAGE: uudecode [infile]\n"); -X exit(10); -X } -X break; -X -X default: -X fprintf(stderr, "USAGE: uudecode [infile]\n"); -X exit(11); -X break; -X } -X -X /* Loop through file, searching for headers. Decode anything with a -X header, complain if there where no headers. */ -X -Xfor (;;) -X{ -X /* search file for header line */ -X for (;;) -X { -X if (fgets(buf, sizeof buf, in) == NULL) -X { -X if (!through_loop) -X { -X fprintf(stderr, "ERROR: no `begin' line!\n"); -X exit(12); -X } -X else -X { -X exit(0); -X } -X } -X if (strncmp(buf, "begin ", 6) == 0) -X break; -X } -X sscanf(buf, "begin %o %s", &mode, dest); -X -X#ifdef unix -X /* handle ~user/file format */ -X if (dest[0] == '~') -X { -X char *sl; -X struct passwd *getpwnam(); -X char *index(); -X struct passwd *user; -X char dnbuf[100]; -X -X sl = index(dest, '/'); -X if (sl == NULL) -X { -X fprintf(stderr, "Illegal ~user\n"); -X exit(13); -X } -X *sl++ = 0; -X user = getpwnam(dest+1); -X if (user == NULL) -X { -X fprintf(stderr, "No such user as %s\n", dest); -X exit(14); -X } -X strcpy(dnbuf, user->pw_dir); -X strcat(dnbuf, "/"); -X strcat(dnbuf, sl); -X strcpy(dest, dnbuf); -X } -X#endif -X -X /* create output file */ -X if ((out = fopen(dest, "w")) == NULL) -X { -X fprintf(stderr, "ERROR: can't open output file %s\n", dest); -X exit(15); -X } -X#ifdef unix -X chmod(dest, mode); -X#endif -X -X decode(in, out, dest); -X -X if (fgets(buf, sizeof buf, in) == NULL || strncmp(buf,"end",3)) -X { /* don't be overly picky about newline ^ */ -X fprintf(stderr, "ERROR: no `end' line\n"); -X exit(16); -X } -X -X if (!(fgets(buf,sizeof buf,in) == NULL || strncmp(buf,"size ",3))) -X { -X sscanf(buf, "size %ld", &filesize); -X if (ftell(out) != filesize) -X { -X fprintf(stderr, "ERROR: file should have been %ld bytes long but was -X exit(17); -X } -X } -X through_loop = 1; -X} /* forever */ -X} /* main */ -X -X/* -X * Copy from in to out, decoding as you go. -X * If a return or newline is encountered too early in a line, it is -X * assumed that means that some editor has truncated trailing spaces. -X */ -Xdecode(in, out, dest) -XFILE *in; -XFILE *out; -Xchar *dest; -X{ -Xchar buf[81]; -Xchar *bp; -Xint nosum=0; -X#ifndef unix -Xextern errno; -X#endif -Xregister int j; -Xregister int n; -Xint checksum, line; -X -X for (line = 1; ; line++) /* for each input line */ -X { -X if (fgets(buf, sizeof buf, in) == NULL) -X { -X fprintf(stderr, "ERROR: input ended unexpectedly!\n"); -X exit(18); -X } -X -X /* Pad end of lines in case some editor truncated trailing -X spaces */ -X -X for (n=0;n<79;n++) /* search for first \r, \n or \000 */ -X { -X if (buf[n]=='\176') /* If BITNET made a twiddle, */ -X buf[n]='\136'; /* we make a caret */ -X if (buf[n]=='\r'||buf[n]=='\n'||buf[n]=='\000') -X break; -X } -X for (;n<79;n++) /* when found, fill rest of line with space */ -X { -X buf[n]=' '; -X } -X buf[79]=0; /* terminate new string */ -X -X checksum = 0; -X n = DEC(buf[0]); -X if (n <= 0) -X break; /* 0 bytes on a line?? Must be the last line */ -X -X bp = &buf[1]; -X -X /* FOUR input characters go into each THREE output charcters */ -X -X while (n >= 4) -X { -X j = DEC(bp[0]) << 2 | DEC(bp[1]) >> 4; putc(j, out); checksum += j; -X j = DEC(bp[1]) << 4 | DEC(bp[2]) >> 2; putc(j, out); checksum += j; -X j = DEC(bp[2]) << 6 | DEC(bp[3]); putc(j, out); checksum += j; -X checksum = checksum % SUMSIZE; -X bp += 4; -X n -= 3; -X } -X -X j = DEC(bp[0]) << 2 | DEC(bp[1]) >> 4; -X checksum += j; -X if (n >= 1) -X putc(j, out); -X j = DEC(bp[1]) << 4 | DEC(bp[2]) >> 2; -X checksum += j; -X if (n >= 2) -X putc(j, out); -X j = DEC(bp[2]) << 6 | DEC(bp[3]); -X checksum += j; -X if (n >= 3) -X putc(j, out); -X checksum = checksum % SUMSIZE; -X bp += 4; -X n -= 3; -X -X#ifndef unix -X /* Error checking under UNIX??? You must be kidding... */ -X /* Check if an error occured while writing to that last line */ -X if (errno) -X { -X fprintf(stderr, "ERROR: error writing to %s\n",dest); -X exit(19); -X } -X#endif -X -X /* The line has been decoded; now check that sum */ -X -X nosum |= !isspace(*bp); -X if (nosum) /* Is there a checksum at all?? */ -X { -X if (checksum != DEC(*bp)) /* Does that checksum match? */ -X { -X fprintf(stderr, "ERROR: checksum mismatch decoding %s, line %d.\ -X } -X } /* sum */ -X } /* line */ -X} /* function */ -X -X#ifdef unix -X/* -X * Return the ptr in sp at which the character c appears; -X * 0 if not found -X */ -Xchar * -Xindex(sp, c) -Xregister char *sp, c; -X{ -X do -X { -X if (*sp == c) -X return(sp); -X } -X while (*sp++); -X -X return(0); -X} -X#endif unix -X - -END_OF_FILE -echo shar: NEWLINE appended to \"'uudecode.c'\" -if test 6419 -ne `wc -c <'uudecode.c'`; then - echo shar: \"'uudecode.c'\" unpacked with wrong size! -fi -# end of 'uudecode.c' -fi -echo shar: End of shell archive. -exit 0 diff --git a/commands/flex-2.5.4/MISC/MVS/README b/commands/flex-2.5.4/MISC/MVS/README deleted file mode 100644 index 09741ab05..000000000 --- a/commands/flex-2.5.4/MISC/MVS/README +++ /dev/null @@ -1,44 +0,0 @@ -These patches and supplemental programs should allow porting to MVS or MVS/XA -in an EBCDIC envrionment, using SAS C V4.00C. - -Included are: - -rw-r--r-- 1 swl26 1573 Jul 17 14:32 README - -rw-rw-r-- 1 swl26 20861 Jul 17 13:41 diffs - -rw-rw-r-- 1 swl26 5022 Jul 17 14:00 fixit.l - -rw-rw-r-- 1 swl26 97644 Jul 17 13:42 initscan.mvs.c - -rw-rw-r-- 1 swl26 4898 Jul 17 14:08 unfixit.l - -The file "diffs" contains context diffs for changes to flex 2.3. - -The file "fixit.l" contains flex sources for a program to shorten external -variable and function names to 8 characters or less. This is required for the -"dumb" compiler linker used. - -The file "unfixit.l" reverses the changes in "fixit.l", to restore long names. -This is useful when trying to build diff files as created here. - -The file "initscan.mvs.c" is an already "flexed" version of scan.l, in an -EBCDIC environment. - -To install in an MVS environment, use patch to apply the diffs to flex 2.3, -then run "fixit" on all .c, .h, .l, .y, and .skel files. Move the files -to the MVS machine, and compile each of the .c files. (You will need a -"yacc" functional equivalent under MVS to expand parse.y in that -environment.) Link together, and the resulting flex should be ready to -go. To test, run the MVSflex -is8 -Ce on the scan.l, and you should get -back a file which is identical to initscan.mvs.c. - -Enjoy. - -Steven W. Layten -Senior Engineer -Chemical Abstracts Service -PO Box 3012 -2540 Olentangy River Road -Columbus, Ohio 43210 - -+1 614 421 3600 extension 3451 - -INET: swl26%cas.BITNET@CUNYVM.CUNY.Edu -UUCP: osu-cis!chemabs!swl26 -BITNET: swl26@cas.bitnet diff --git a/commands/flex-2.5.4/MISC/MVS/diffs b/commands/flex-2.5.4/MISC/MVS/diffs deleted file mode 100644 index 77cf305a8..000000000 --- a/commands/flex-2.5.4/MISC/MVS/diffs +++ /dev/null @@ -1,854 +0,0 @@ -diff -c ../Makefile ./Makefile -*** ../Makefile Thu Jun 28 00:44:07 1990 ---- ./Makefile Mon Jul 16 13:57:26 1990 -*************** -*** 39,49 **** - # AUXDIR, manual pages will be installed in MANDIR with extension MANEXT. - # Raw, unformatted troff source will be installed if INSTALLMAN=man, nroff - # preformatted versions will be installed if INSTALLMAN=cat. -! DESTDIR = - BINDIR = /usr/local - LIBDIR = /usr/local/lib - AUXDIR = /usr/local/lib - MANDIR = /usr/man/manl - MANEXT = l - INSTALLMAN = man - ---- 39,50 ---- - # AUXDIR, manual pages will be installed in MANDIR with extension MANEXT. - # Raw, unformatted troff source will be installed if INSTALLMAN=man, nroff - # preformatted versions will be installed if INSTALLMAN=cat. -! DESTDIR = /projects/m751stereo/code/c/swl26 - BINDIR = /usr/local - LIBDIR = /usr/local/lib - AUXDIR = /usr/local/lib - MANDIR = /usr/man/manl -+ INCLUDEDIR = . - MANEXT = l - INSTALLMAN = man - -*************** -*** 52,58 **** - - SKELETON_FILE = $(DESTDIR)$(AUXDIR)/flex.skel - SKELFLAGS = -DDEFAULT_SKELETON_FILE=\"$(SKELETON_FILE)\" -! CFLAGS = -O - LDFLAGS = -s - - COMPRESSION = ---- 53,59 ---- - - SKELETON_FILE = $(DESTDIR)$(AUXDIR)/flex.skel - SKELFLAGS = -DDEFAULT_SKELETON_FILE=\"$(SKELETON_FILE)\" -! CFLAGS = -O -DUSG -I$(INCLUDEDIR) - LDFLAGS = -s - - COMPRESSION = -diff -c ../ccl.c ./ccl.c -*** ../ccl.c Thu Jun 28 00:44:07 1990 ---- ./ccl.c Mon Jul 16 13:57:27 1990 -*************** -*** 28,37 **** - - #ifndef lint - static char rcsid[] = -! "@(#) $Header$ (LBL)"; - #endif - -! #include "flexdef.h" - - /* ccladd - add a single character to a ccl - * ---- 28,37 ---- - - #ifndef lint - static char rcsid[] = -! "@(#) $Header$ (LBL)"; - #endif - -! #include - - /* ccladd - add a single character to a ccl - * -diff -c ../dfa.c ./dfa.c -*** ../dfa.c Thu Jun 28 00:44:08 1990 ---- ./dfa.c Mon Jul 16 13:57:28 1990 -*************** -*** 28,37 **** - - #ifndef lint - static char rcsid[] = -! "@(#) $Header$ (LBL)"; - #endif - -! #include "flexdef.h" - - - /* declare functions that have forward references */ ---- 28,38 ---- - - #ifndef lint - static char rcsid[] = -! "@(#) $Header$ (LBL)"; - #endif - -! #include -! #include - - - /* declare functions that have forward references */ -*************** -*** 682,688 **** - register int j; - - for ( i = 'A', j = 'a'; i <= 'Z'; ++i, ++j ) -! state[i] = state[j]; - } - - if ( ds > num_start_states ) ---- 683,692 ---- - register int j; - - for ( i = 'A', j = 'a'; i <= 'Z'; ++i, ++j ) -! { -! if (isupper(i) ) -! state[i] = state[j]; -! } - } - - if ( ds > num_start_states ) -*************** -*** 958,964 **** - } - } - -! else if ( sym >= 'A' && sym <= 'Z' && caseins ) - flexfatal( "consistency check failed in symfollowset" ); - - else if ( sym == SYM_EPSILON ) ---- 962,968 ---- - } - } - -! else if ( isupper ( sym ) && caseins ) - flexfatal( "consistency check failed in symfollowset" ); - - else if ( sym == SYM_EPSILON ) -Only in .: diffs -Only in .: diffs.new -diff -c ../ecs.c ./ecs.c -*** ../ecs.c Thu Jun 28 00:44:08 1990 ---- ./ecs.c Mon Jul 16 13:57:28 1990 -*************** -*** 28,37 **** - - #ifndef lint - static char rcsid[] = -! "@(#) $Header$ (LBL)"; - #endif - -! #include "flexdef.h" - - /* ccl2ecl - convert character classes to set of equivalence classes - * ---- 28,37 ---- - - #ifndef lint - static char rcsid[] = -! "@(#) $Header$ (LBL)"; - #endif - -! #include - - /* ccl2ecl - convert character classes to set of equivalence classes - * -diff -c ../flex.skel ./flex.skel -*** ../flex.skel Thu Jun 28 00:44:27 1990 ---- ./flex.skel Mon Jul 16 13:57:29 1990 -*************** -*** 1,7 **** - /* A lexical scanner generated by flex */ - - /* scanner skeleton version: -! * $Header$ - */ - - #define FLEX_SCANNER ---- 1,7 ---- - /* A lexical scanner generated by flex */ - - /* scanner skeleton version: -! * $Header$ - */ - - #define FLEX_SCANNER -diff -c ../flexdef.h ./flexdef.h -*** ../flexdef.h Thu Jun 28 00:44:27 1990 ---- ./flexdef.h Mon Jul 16 13:57:30 1990 -*************** -*** 26,32 **** - * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. - */ - -! /* @(#) $Header$ (LBL) */ - - #ifndef FILE - #include ---- 26,32 ---- - * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. - */ - -! /* @(#) $Header$ (LBL) */ - - #ifndef FILE - #include -*************** -*** 45,51 **** - - /* size of input alphabet - should be size of ASCII set */ - #ifndef DEFAULT_CSIZE -! #define DEFAULT_CSIZE 128 - #endif - - #ifndef PROTO ---- 45,51 ---- - - /* size of input alphabet - should be size of ASCII set */ - #ifndef DEFAULT_CSIZE -! #define DEFAULT_CSIZE 256 - #endif - - #ifndef PROTO -*************** -*** 90,96 **** ---- 90,98 ---- - #define SHORT_FILE_NAMES - #endif - -+ #ifndef OSVS - char *malloc(), *realloc(); -+ #endif - - - /* maximum line length we'll have to deal with */ -*************** -*** 116,125 **** - #define true 1 - #define false 0 - -- - #ifndef DEFAULT_SKELETON_FILE - #define DEFAULT_SKELETON_FILE "flex.skel" -! #endif - - /* special chk[] values marking the slots taking by end-of-buffer and action - * numbers ---- 118,132 ---- - #define true 1 - #define false 0 - - #ifndef DEFAULT_SKELETON_FILE -+ #ifdef OSVS -+ #define DEFAULT_SKELETON_FILE "ctri01" -+ #define SYSUT1 "sysut1" -+ #define SYSUT2 "sysut2" -+ #else - #define DEFAULT_SKELETON_FILE "flex.skel" -! #endif /* OSVS */ -! #endif /* DEFAULT_SKELETON_FILE */ - - /* special chk[] values marking the slots taking by end-of-buffer and action - * numbers -*************** -*** 226,233 **** - #define INITIAL_MAX_SCS 40 /* maximum number of start conditions */ - #define MAX_SCS_INCREMENT 40 /* amount to bump by if it's not enough */ - -! #define ONE_STACK_SIZE 500 /* stack of states with only one out-transition */ -! #define SAME_TRANS -1 /* transition is the same as "default" entry for state */ - - /* the following percentages are used to tune table compression: - ---- 233,240 ---- - #define INITIAL_MAX_SCS 40 /* maximum number of start conditions */ - #define MAX_SCS_INCREMENT 40 /* amount to bump by if it's not enough */ - -! #define ONE_STACK_SIZE 500 /*stack of states with only one out-transition*/ -! #define SAME_TRANS -1 /*transition is the same as "default" entry for state */ - - /* the following percentages are used to tune table compression: - -diff -c ../gen.c ./gen.c -*** ../gen.c Thu Jun 28 00:44:28 1990 ---- ./gen.c Mon Jul 16 13:57:32 1990 -*************** -*** 28,37 **** - - #ifndef lint - static char rcsid[] = -! "@(#) $Header$ (LBL)"; - #endif - -! #include "flexdef.h" - - - /* declare functions that have forward references */ ---- 28,37 ---- - - #ifndef lint - static char rcsid[] = -! "@(#) $Header$ (LBL)"; - #endif - -! #include - - - /* declare functions that have forward references */ -*************** -*** 292,298 **** - - indent_puts( "{" ); - -! indent_puts( "if ( yy_lp && yy_lp < yy_accept[yy_current_state + 1] )" ); - indent_up(); - indent_puts( "{" ); - indent_puts( "yy_act = yy_acclist[yy_lp];" ); ---- 292,298 ---- - - indent_puts( "{" ); - -! indent_puts("if( yy_lp && yy_lp < yy_accept[yy_current_state + 1] )"); - indent_up(); - indent_puts( "{" ); - indent_puts( "yy_act = yy_acclist[yy_lp];" ); -diff -c ../initscan.c ./initscan.c -*** ../initscan.c Thu Jun 28 00:44:51 1990 ---- ./initscan.c Mon Jul 16 13:57:33 1990 -*************** -*** 1,7 **** - /* A lexical scanner generated by flex */ - - /* scanner skeleton version: -! * $Header$ - */ - - #define FLEX_SCANNER ---- 1,7 ---- - /* A lexical scanner generated by flex */ - - /* scanner skeleton version: -! * $Header$ - */ - - #define FLEX_SCANNER -*************** -*** 193,199 **** - - #ifndef lint - static char rcsid[] = -! "@(#) $Header$ (LBL)"; - #endif - - #undef yywrap ---- 193,199 ---- - - #ifndef lint - static char rcsid[] = -! "@(#) $Header$ (LBL)"; - #endif - - #undef yywrap -diff -c ../libmain.c ./libmain.c -*** ../libmain.c Thu Jun 28 00:44:28 1990 ---- ./libmain.c Mon Jul 16 13:57:34 1990 -*************** -*** 1,6 **** - /* libmain - flex run-time support library "main" function */ - -! /* $Header$ */ - - extern int yylex(); - ---- 1,6 ---- - /* libmain - flex run-time support library "main" function */ - -! /* $Header$ */ - - extern int yylex(); - -diff -c ../main.c ./main.c -*** ../main.c Thu Jun 28 00:44:29 1990 ---- ./main.c Mon Jul 16 13:57:34 1990 -*************** -*** 34,44 **** - - #ifndef lint - static char rcsid[] = -! "@(#) $Header$ (LBL)"; - #endif - - -! #include "flexdef.h" - - static char flex_version[] = "2.3"; - ---- 34,44 ---- - - #ifndef lint - static char rcsid[] = -! "@(#) $Header$ (LBL)"; - #endif - - -! #include - - static char flex_version[] = "2.3"; - -*************** -*** 97,106 **** - char *program_name; - - #ifndef SHORT_FILE_NAMES - static char *outfile = "lex.yy.c"; -! #else - static char *outfile = "lexyy.c"; -! #endif - static int outfile_created = 0; - static int use_stdout; - static char *skelname = NULL; ---- 97,110 ---- - char *program_name; - - #ifndef SHORT_FILE_NAMES -+ #ifdef OSVS -+ static char *outfile = "ctro01"; -+ #else /* not OSVS */ - static char *outfile = "lex.yy.c"; -! #endif /* not OSVS */ -! #else /* SHORT_FILE_NAMES */ - static char *outfile = "lexyy.c"; -! #endif /* SHORT_FILE_NAMES */ - static int outfile_created = 0; - static int use_stdout; - static char *skelname = NULL; -*************** -*** 209,216 **** ---- 213,222 ---- - else if ( fclose( temp_action_file ) ) - flexfatal( "error occurred when closing temporary action file" ); - -+ #ifndef OSVS - else if ( unlink( action_file_name ) ) - flexfatal( "error occurred when deleting temporary action file" ); -+ #endif - } - - if ( status != 0 && outfile_created ) -*************** -*** 221,228 **** ---- 227,236 ---- - else if ( fclose( stdout ) ) - flexfatal( "error occurred when closing output file" ); - -+ #ifndef OSVS - else if ( unlink( outfile ) ) - flexfatal( "error occurred when deleting output file" ); -+ #endif - } - - if ( backtrack_report && backtrack_file ) -*************** -*** 574,583 **** - if ( backtrack_report ) - { - #ifndef SHORT_FILE_NAMES - backtrack_file = fopen( "lex.backtrack", "w" ); -! #else - backtrack_file = fopen( "lex.bck", "w" ); -! #endif - - if ( backtrack_file == NULL ) - flexerror( "could not create lex.backtrack" ); ---- 582,595 ---- - if ( backtrack_report ) - { - #ifndef SHORT_FILE_NAMES -+ #ifdef OSVS -+ backtrack_file = fopen( SYSUT2, "w"); -+ #else /* not OSVS */ - backtrack_file = fopen( "lex.backtrack", "w" ); -! #endif /* OSVS */ -! #else /* SHORT_FILE_NAMES */ - backtrack_file = fopen( "lex.bck", "w" ); -! #endif /* SHORT_FILE_NAMES */ - - if ( backtrack_file == NULL ) - flexerror( "could not create lex.backtrack" ); -*************** -*** 597,604 **** - lerrsf( "can't open skeleton file %s", skelname ); - - #ifdef SYS_V - action_file_name = tmpnam( NULL ); -! #endif - - if ( action_file_name == NULL ) - { ---- 609,620 ---- - lerrsf( "can't open skeleton file %s", skelname ); - - #ifdef SYS_V -+ #ifndef OSVS - action_file_name = tmpnam( NULL ); -! #else /* OSVS */ -! action_file_name = SYSUT1; -! #endif /* OSVS */ -! #endif /* SYS_V */ - - if ( action_file_name == NULL ) - { -*************** -*** 609,615 **** ---- 625,636 ---- - #else - (void) strcpy( temp_action_file_name, "flexXXXXXX.tmp" ); - #endif -+ #ifndef OSVS - (void) mktemp( temp_action_file_name ); -+ #else /* OSVS */ -+ /* should never be executed in OSVS as IF should always be false */ -+ (void) strcpy( temp_action_file_name, SYSUT1 ) ; -+ #endif /* OSVS */ - - action_file_name = temp_action_file_name; - } -diff -c ../misc.c ./misc.c -*** ../misc.c Thu Jun 28 00:44:40 1990 ---- ./misc.c Mon Jul 16 13:57:35 1990 -*************** -*** 28,38 **** - - #ifndef lint - static char rcsid[] = -! "@(#) $Header$ (LBL)"; - #endif - - #include -! #include "flexdef.h" - - - /* ANSI C does not guarantee that isascii() is defined */ ---- 28,38 ---- - - #ifndef lint - static char rcsid[] = -! "@(#) $Header$ (LBL)"; - #endif - - #include -! #include - - - /* ANSI C does not guarantee that isascii() is defined */ -*************** -*** 107,113 **** ---- 107,117 ---- - { - while ( *str ) - { -+ #ifdef OSVS -+ if ( ! islower( *str ) ) -+ #else - if ( ! isascii( *str ) || ! islower( *str ) ) -+ #endif - return ( 0 ); - ++str; - } -*************** -*** 130,136 **** ---- 134,144 ---- - { - while ( *str ) - { -+ #ifdef OSVS -+ if ( ! isupper( (char) *str ) ) -+ #else - if ( ! isascii( *str ) || ! isupper( (char) *str ) ) -+ #endif - return ( 0 ); - ++str; - } -*************** -*** 182,188 **** ---- 190,200 ---- - register int c; - - { -+ #ifdef OSVS -+ return ( isupper( c ) ? (Char) tolower( c ) : (Char) c ); -+ #else - return ( (isascii( c ) && isupper( c )) ? tolower( c ) : c ); -+ #endif - } - - -*************** -*** 204,210 **** - for ( c = str; *c; ++c ) - ; - -! copy = malloc( (unsigned) ((c - str + 1) * sizeof( char )) ); - - if ( copy == NULL ) - flexfatal( "dynamic memory failure in copy_string()" ); ---- 216,222 ---- - for ( c = str; *c; ++c ) - ; - -! copy = (char *) malloc( (unsigned) ((c - str + 1) * sizeof( char )) ); - - if ( copy == NULL ) - flexfatal( "dynamic memory failure in copy_string()" ); -*************** -*** 392,403 **** ---- 404,421 ---- - - #ifndef MS_DOS - #ifndef VMS -+ #ifndef OSVS - #include -+ #endif /* OSVS */ - #else - #include - #endif - #endif - -+ #ifdef OSVS -+ #include -+ #endif /* OSVS */ -+ - #ifdef MS_DOS - #include - typedef long time_t; -*************** -*** 615,621 **** ---- 633,643 ---- - if ( array[1] == 'x' ) - ++sptr; - -+ #ifdef OSVS -+ while ( isdigit( array[sptr] ) ) -+ #else - while ( isascii( array[sptr] ) && isdigit( array[sptr] ) ) -+ #endif - /* don't increment inside loop control because if - * isdigit() is a macro it will expand it to two - * increments ... -Only in ..: new -diff -c ../nfa.c ./nfa.c -*** ../nfa.c Thu Jun 28 00:44:40 1990 ---- ./nfa.c Mon Jul 16 13:57:36 1990 -*************** -*** 28,37 **** - - #ifndef lint - static char rcsid[] = -! "@(#) $Header$ (LBL)"; - #endif - -! #include "flexdef.h" - - - /* declare functions that have forward references */ ---- 28,37 ---- - - #ifndef lint - static char rcsid[] = -! "@(#) $Header$ (LBL)"; - #endif - -! #include - - - /* declare functions that have forward references */ -*************** -*** 110,116 **** - { - int sym, tsp1, tsp2, anum, ns; - -! fprintf( stderr, "\n\n********** beginning dump of nfa with start state %d\n", - state1 ); - - /* we probably should loop starting at firstst[state1] and going to ---- 110,116 ---- - { - int sym, tsp1, tsp2, anum, ns; - -! fprintf(stderr,"\n\n********* beginning dump of nfa with start state %d\n", - state1 ); - - /* we probably should loop starting at firstst[state1] and going to -diff -c ../parse.y ./parse.y -*** ../parse.y Thu Jun 28 00:44:40 1990 ---- ./parse.y Mon Jul 16 13:57:36 1990 -*************** -*** 32,45 **** - - #ifndef lint - static char rcsid[] = -! "@(#) $Header$ (LBL)"; - #endif - -! #include "flexdef.h" - - int pat, scnum, eps, headcnt, trailcnt, anyccl, lastchar, i, actvp, rulelen; - int trlcontxt, xcluflg, cclsorted, varlength, variable_trail_rule; - Char clower(); - - static int madeany = false; /* whether we've made the '.' character class */ - int previous_continued_action; /* whether the previous rule's action was '|' */ ---- 32,47 ---- - - #ifndef lint - static char rcsid[] = -! "@(#) $Header$ (LBL)"; - #endif - -! #include - - int pat, scnum, eps, headcnt, trailcnt, anyccl, lastchar, i, actvp, rulelen; - int trlcontxt, xcluflg, cclsorted, varlength, variable_trail_rule; - Char clower(); -+ void build_eof_action(); -+ void yyerror(); - - static int madeany = false; /* whether we've made the '.' character class */ - int previous_continued_action; /* whether the previous rule's action was '|' */ -diff -c ../scan.l ./scan.l -*** ../scan.l Thu Jun 28 00:44:41 1990 ---- ./scan.l Mon Jul 16 13:57:37 1990 -*************** -*** 30,42 **** - - #ifndef lint - static char rcsid[] = -! "@(#) $Header$ (LBL)"; - #endif - - #undef yywrap - -! #include "flexdef.h" -! #include "parse.h" - - #define ACTION_ECHO fprintf( temp_action_file, "%s", yytext ) - #define MARK_END_OF_PROLOG fprintf( temp_action_file, "%%%% end of prolog\n" ); ---- 30,42 ---- - - #ifndef lint - static char rcsid[] = -! "@(#) $Header$ (LBL)"; - #endif - - #undef yywrap - -! #include -! #include - - #define ACTION_ECHO fprintf( temp_action_file, "%s", yytext ) - #define MARK_END_OF_PROLOG fprintf( temp_action_file, "%%%% end of prolog\n" ); -diff -c ../sym.c ./sym.c -*** ../sym.c Thu Jun 28 00:44:41 1990 ---- ./sym.c Mon Jul 16 13:57:37 1990 -*************** -*** 28,37 **** - - #ifndef lint - static char rcsid[] = -! "@(#) $Header$ (LBL)"; - #endif - -! #include "flexdef.h" - - - /* declare functions that have forward references */ ---- 28,37 ---- - - #ifndef lint - static char rcsid[] = -! "@(#) $Header$ (LBL)"; - #endif - -! #include - - - /* declare functions that have forward references */ -diff -c ../tblcmp.c ./tblcmp.c -*** ../tblcmp.c Thu Jun 28 00:44:41 1990 ---- ./tblcmp.c Mon Jul 16 13:57:38 1990 -*************** -*** 28,37 **** - - #ifndef lint - static char rcsid[] = -! "@(#) $Header$ (LBL)"; - #endif - -! #include "flexdef.h" - - - /* declarations for functions that have forward references */ ---- 28,37 ---- - - #ifndef lint - static char rcsid[] = -! "@(#) $Header$ (LBL)"; - #endif - -! #include - - - /* declarations for functions that have forward references */ -diff -c ../yylex.c ./yylex.c -*** ../yylex.c Thu Jun 28 00:44:41 1990 ---- ./yylex.c Mon Jul 16 13:57:38 1990 -*************** -*** 28,39 **** - - #ifndef lint - static char rcsid[] = -! "@(#) $Header$ (LBL)"; - #endif - - #include -! #include "flexdef.h" -! #include "parse.h" - - - /* ANSI C does not guarantee that isascii() is defined */ ---- 28,39 ---- - - #ifndef lint - static char rcsid[] = -! "@(#) $Header$ (LBL)"; - #endif - - #include -! #include -! #include - - - /* ANSI C does not guarantee that isascii() is defined */ -*************** -*** 180,186 **** ---- 180,190 ---- - break; - - default: -+ #ifdef OSVS -+ if ( ! isprint( yylval ) ) -+ #else - if ( ! isascii( yylval ) || ! isprint( yylval ) ) -+ #endif - fprintf( stderr, "\\%.3o", yylval ); - else - (void) putc( yylval, stderr ); diff --git a/commands/flex-2.5.4/MISC/MVS/fixit.l b/commands/flex-2.5.4/MISC/MVS/fixit.l deleted file mode 100644 index 3e15b6fa4..000000000 --- a/commands/flex-2.5.4/MISC/MVS/fixit.l +++ /dev/null @@ -1,138 +0,0 @@ -%{ -/* fixit.l - convert long external names to names of 8-bytes or less */ -/* - * This program is included to satisfy "dumb" compilers/linkers which - * do not know about externals of names longer than 8 bytes. - * - * Steven W. Layten - * Chemical Abstracts Service - * PO BOX 3012 - * Columbus, OH 43210 - */ -%} -%% -"action_file_name" printf("actfilnm"); -"action_out" printf("actnout"); -"add_accept" printf("addacpt"); -"all_lower" printf("alllower"); -"all_upper" printf("allupper"); -"allocate_array" printf("allocarr"); -"assoc_rule" printf("asscrule"); -"backtrack_file" printf("bktrkfil"); -"backtrack_report" printf("bktrkrep"); -"bol_needed" printf("bol_nded"); -"build_eof_action" printf("bldeofac"); -"cclinstal" printf("cclnstal"); -"ccllookup" printf("ccllookp"); -"cclnegate" printf("cclnegat"); -"cclsorted" printf("cclsrted"); -"check_for_backtracking" printf("ck4bktrk"); -"check_trailing_context" printf("cktrlcnt"); -"continued_action" printf("cntdactn"); -"copy_string" printf("copystrn"); -"copy_unsigned_string" printf("cpunsstr"); -"copyright" printf("cpyrght"); -"copysingl" printf("copysngl"); -"current_max_ccl_tbl_size" printf("c_mx_ccl"); -"current_max_dfa_size" printf("c_mx_dfa"); -"current_max_dfas" printf("c_mxdfas"); -"current_max_rules" printf("curmxrls"); -"current_max_scs" printf("c_mx_scs"); -"current_max_template_xpairs" printf("c_mx_tmp"); -"current_max_xpairs" printf("c_mx_xpr"); -"current_maxccls" printf("c_mxccls"); -"current_mns" printf("curr_mns"); -"current_state_type" printf("cursttyp"); -"dataflush" printf("datflush"); -"dfaacc_union" printf("dfacunin"); -"do_indent" printf("do_indnt"); -"dump_associated_rules" printf("dmpasrl"); -"dump_transitions" printf("dmptrns"); -"dupmachine" printf("dupmach"); -"ecs_from_xlation" printf("ecsfrmxt"); -"end_of_buffer_state" printf("eobstate"); -"epsclosure" printf("epsclos"); -"expand_nxt_chk" printf("expnxtck"); -"find_table_space" printf("fndtblsp"); -"finish_rule" printf("fnshrule"); -"firstfree" printf("firstfre"); -"firstprot" printf("firstprt"); -"flex_gettime" printf("flxgettm"); -"flexerror" printf("flxerror"); -"flexfatal" printf("flxfatal"); -"format_pinpoint_message" printf("fmtptmsg"); -"gen_NUL_trans" printf("gnNULtrn"); -"gen_backtracking" printf("gnbktrkg"); -"gen_bt_action" printf("gnbtactn"); -"gen_find_action" printf("gnfndact"); -"gen_line_dirs" printf("gnlindir"); -"gen_next_compressed_state" printf("gnnxcste"); -"gen_next_match" printf("gnnxmtch"); -"gen_next_state" printf("gnnxtst"); -"gen_start_state" printf("gnstrtst"); -"hash_entry" printf("hshentry"); -"hashfunct" printf("hshfct"); -"increase_max_dfas" printf("incmxdfa"); -"indent_put2s" printf("indput2s"); -"indent_puts" printf("indputs"); -"infilename" printf("infilnam"); -"input_files" printf("inp_fles"); -"interactive" printf("intractv"); -"line_directive_out" printf("lndirout"); -"link_machines" printf("lnkmchns"); -"list_character_set" printf("lst_cset"); -"make_tables" printf("maketbls"); -"mark_beginning_as_normal" printf("mkbgnorm"); -"mktemplate" printf("mktmplat"); -"num_backtracking" printf("nbktrckg"); -"num_input_files" printf("ninfiles"); -"num_reallocs" printf("numraloc"); -"num_rules" printf("numrules"); -"num_xlations" printf("nuxlatns"); -"numsnpairs" printf("numnpair"); -"output_file_name" printf("outfilnm"); -"peakpairs" printf("peakpair"); -"performance_report" printf("perf_rep"); -"pinpoint_message" printf("pptmsg"); -"place_state" printf("plcstate"); -"previous_continued_action" printf("prvctdan"); -"printstats" printf("prtstats"); -"program_name" printf("pgm_name"); -"protcomst" printf("prtcomst"); -"readable_form" printf("rdblefrm"); -"real_reject" printf("realrjct"); -"reallocate_array" printf("rallocar"); -"reject_really_used" printf("rjctused"); -"rule_linenum" printf("rulelnno"); -"rule_type" printf("ruletype"); -"set_input_file" printf("stinpfle"); -"set_up_initial_allocations" printf("setupia"); -"starttime" printf("startime"); -"state_type" printf("ste_type"); -"symfollowset" printf("symfollo"); -"sympartition" printf("sympartn"); -"syntaxerror" printf("syntxerr"); -"temp_action_file" printf("tmpactfl"); -"todo_head" printf("todohead"); -"todo_next" printf("todonext"); -"transchar" printf("trnschar"); -"transition_struct_out" printf("trnstout"); -"trlcontxt" printf("trlcntxt"); -"variable_trail_rule" printf("vtrailrl"); -"variable_trailing_context_rules" printf("vtrlctrl"); -"varlength" printf("varlngth"); -"yy_create_buffer" printf("yycrbffr"); -"yy_delete_buffer" printf("yydlbffr"); -"yy_init_buffer" printf("yyinbffr"); -"yy_load_buffer_state" printf("yyldbfst"); -"yy_switch_to_buffer" printf("yyswtobf"); -"yyerrflag" printf("yyerrflg"); -"yymore_really_used" printf("yymrreus"); -"yymore_used" printf("yymrused"); -"yyrestart" printf("yyrestrt"); -. ECHO; -%% -main() -{ - yylex(); -} diff --git a/commands/flex-2.5.4/MISC/MVS/initscan-mvs.c b/commands/flex-2.5.4/MISC/MVS/initscan-mvs.c deleted file mode 100644 index 9aaed4a53..000000000 --- a/commands/flex-2.5.4/MISC/MVS/initscan-mvs.c +++ /dev/null @@ -1,2672 +0,0 @@ -/* A lexical scanner generated by flex */ - -/* scanner skeleton version: - * $Header: flex.skel,v 2.13 90/05/26 17:24:13 ve - */ - -#define FLEX_SCANNER - -#include - -#ifdef __STDC__ - -#ifndef DONT_HAVE_STDLIB_H -#include -#else -void *malloc( unsigned ); -void free( void* ); -#endif - -#define YY_USE_PROTOS -#define YY_USE_CONST -#endif - - -/* cfront 1.2 defines "c_plusplus" instead of "__cplusplus" */ -#ifdef c_plusplus -#ifndef __cplusplus -#define __cplusplus -#endif -#endif - - -#ifdef __cplusplus - -#ifndef __STDC__ -#include -#endif - -#include - -/* use prototypes in function declarations */ -#define YY_USE_PROTOS - -/* the "const" storage-class-modifier is valid */ -#define YY_USE_CONST - -#endif - - -#ifdef __TURBOC__ -#define YY_USE_CONST -#endif - - -#ifndef YY_USE_CONST -#define const -#endif - - -#ifdef YY_USE_PROTOS -#define YY_PROTO(proto) proto -#else -#define YY_PROTO(proto) () -/* there's no standard place to get these definitions */ -char *malloc(); -int free(); -int read(); -#endif - - -/* amount of stuff to slurp up with each read */ -#ifndef YY_READ_BUF_SIZE -#define YY_READ_BUF_SIZE 8192 -#endif - -/* returned upon end-of-file */ -#define YY_END_TOK 0 - -/* copy whatever the last rule matched to the standard output */ - -/* cast to (char *) is because for 8-bit chars, yytext is (unsigned char *) */ -/* this used to be an fputs(), but since the string might contain NUL's, - * we now use fwrite() - */ -#define ECHO (void) fwrite( (char *) yytext, yyleng, 1, yyout ) - -/* gets input and stuffs it into "buf". number of characters read, or YY_NULL, - * is returned in "result". - */ -#define YY_INPUT(buf,result,max_size) \ - if ( (result = read( fileno(yyin), (char *) buf, max_size )) < 0 ) \ - YY_FATAL_ERROR( "read() in flex scanner failed" ); -#define YY_NULL 0 - -/* no semi-colon after return; correct usage is to write "yyterminate();" - - * we don't want an extra ';' after the "return" because that will cause - * some compilers to complain about unreachable statements. - */ -#define yyterminate() return ( YY_NULL ) - -/* report a fatal error */ - -/* The funky do-while is used to turn this macro definition into - * a single C statement (which needs a semi-colon terminator). - * This avoids problems with code like: - * - * if ( something_happens ) - * YY_FATAL_ERROR( "oops, the something happened" ); - * else - * everything_okay(); - * - * Prior to using the do-while the compiler would get upset at the - * "else" because it interpreted the "if" statement as being all - * done when it reached the ';' after the YY_FATAL_ERROR() call. - */ - -#define YY_FATAL_ERROR(msg) \ - do \ - { \ - (void) fputs( msg, stderr ); \ - (void) putc( '\n', stderr ); \ - exit( 1 ); \ - } \ - while ( 0 ) - -/* default yywrap function - always treat EOF as an EOF */ -#define yywrap() 1 - -/* enter a start condition. This macro really ought to take a parameter, - * but we do it the disgusting crufty way forced on us by the ()-less - * definition of BEGIN - */ -#define BEGIN yy_start = 1 + 2 * - -/* action number for EOF rule of a given start state */ -#define YY_STATE_EOF(state) (YY_END_OF_BUFFER + state + 1) - -/* special action meaning "start processing a new file" */ -#define YY_NEW_FILE \ - do \ - { \ - yyinbffr( yy_current_buffer, yyin ); \ - yyldbfst(); \ - } \ - while ( 0 ) - -/* default declaration of generated scanner - a define so the user can - * easily add parameters - */ -#define YY_DECL int yylex YY_PROTO(( void )) - -/* code executed at the end of each rule */ -#define YY_BREAK break; - -#define YY_END_OF_BUFFER_CHAR 0 - -#ifndef YY_BUF_SIZE -#define YY_BUF_SIZE (YY_READ_BUF_SIZE * 2) /* size of default input buffer */ -#endif - -typedef struct yy_buffer_state *YY_BUFFER_STATE; - -#define YY_CHAR unsigned char -# line 1 "" -#define INITIAL 0 -/* scan.l - scanner for flex input */ -# line 5 "" -/*- - * Copyright (c) 1990 The Regents of the University of California. - * All rights reserved. - * - * This code is derived from software contributed to Berkeley by - * Vern Paxson. - * - * The United States Government has rights in this work pursuant - * to contract no. DE-AC03-76SF00098 between the United States - * Department of Energy and the University of California. - * - * Redistribution and use in source and binary forms with or without - * modification are permitted provided that: (1) source distributions retain - * this entire copyright notice and comment, and (2) distributions including - * binaries display the following acknowledgement: ``This product includes - * software developed by the University of California, Berkeley and its - * contributors'' in the documentation or other materials provided with the - * distribution and in all advertising materials mentioning features or use - * of this software. Neither the name of the University nor the names of - * its contributors may be used to endorse or promote products derived from - * this software without specific prior written permission. - * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED - * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF - * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. - */ - -#ifndef lint -static char rcsid[] = - "@(#) $Header$ (LBL)"; -#endif - -#undef yywrap - -#include -#include - -#define ACTION_ECHO fprintf( tmpactfl, "%s", yytext ) -#define MARK_END_OF_PROLOG fprintf( tmpactfl, "%%%% end of prolog\n" ); - -#undef YY_DECL -#define YY_DECL \ - int flexscan() - -#define RETURNCHAR \ - yylval = yytext[0]; \ - return ( CHAR ); - -#define RETURNNAME \ - (void) strcpy( nmstr, (char *) yytext ); \ - return ( NAME ); - -#define PUT_BACK_STRING(str, start) \ - for ( i = strlen( (char *) (str) ) - 1; i >= start; --i ) \ - unput((str)[i]) - -#define CHECK_REJECT(str) \ - if ( allupper( str ) ) \ - reject = true; - -#define CHECK_YYMORE(str) \ - if ( alllower( str ) ) \ - yymrused = true; -#define SECT2 1 -#define SECT2PROLOG 2 -#define SECT3 3 -#define CODEBLOCK 4 -#define PICKUPDEF 5 -#define SC 6 -#define CARETISBOL 7 -#define NUM 8 -#define QUOTE 9 -#define FIRSTCCL 10 -#define CCL 11 -#define ACTION 12 -#define RECOVER 13 -#define BRACEERROR 14 -#define C_COMMENT 15 -#define ACTION_COMMENT 16 -#define ACTION_STRING 17 -#define PERCENT_BRACE_ACTION 18 -#define USED_LIST 19 -#define CODEBLOCK_2 20 -#define XLATION 21 -# line 84 "" - -/* done after the current pattern has been matched and before the - * corresponding action - sets up yytext - */ -#define YY_DO_BEFORE_ACTION \ - yytext = yy_bp; \ - yyleng = yy_cp - yy_bp; \ - yy_hold_char = *yy_cp; \ - *yy_cp = '\0'; \ - yy_c_buf_p = yy_cp; - -#define EOB_ACT_CONTINUE_SCAN 0 -#define EOB_ACT_END_OF_FILE 1 -#define EOB_ACT_LAST_MATCH 2 - -/* return all but the first 'n' matched characters back to the input stream */ -#define yyless(n) \ - do \ - { \ - /* undo effects of setting up yytext */ \ - *yy_cp = yy_hold_char; \ - yy_c_buf_p = yy_cp = yy_bp + n; \ - YY_DO_BEFORE_ACTION; /* set up yytext again */ \ - } \ - while ( 0 ) - -#define unput(c) yyunput( c, yytext ) - - -struct yy_buffer_state - { - FILE *yy_input_file; - - YY_CHAR *yy_ch_buf; /* input buffer */ - YY_CHAR *yy_buf_pos; /* current position in input buffer */ - - /* size of input buffer in bytes, not including room for EOB characters*/ - int yy_buf_size; - - /* number of characters read into yy_ch_buf, not including EOB characters */ - int yy_n_chars; - - int yy_eof_status; /* whether we've seen an EOF on this buffer */ -#define EOF_NOT_SEEN 0 - /* "pending" happens when the EOF has been seen but there's still - * some text process - */ -#define EOF_PENDING 1 -#define EOF_DONE 2 - }; - -static YY_BUFFER_STATE yy_current_buffer; - -/* we provide macros for accessing buffer states in case in the - * future we want to put the buffer states in a more general - * "scanner state" - */ -#define YY_CURRENT_BUFFER yy_current_buffer - - -/* yy_hold_char holds the character lost when yytext is formed */ -static YY_CHAR yy_hold_char; - -static int yy_n_chars; /* number of characters read into yy_ch_buf */ - - - -#ifndef YY_USER_ACTION -#define YY_USER_ACTION -#endif - -#ifndef YY_USER_INIT -#define YY_USER_INIT -#endif - -extern YY_CHAR *yytext; -extern int yyleng; -extern FILE *yyin, *yyout; - -YY_CHAR *yytext; -int yyleng; - -FILE *yyin = (FILE *) 0, *yyout = (FILE *) 0; - -#define YY_END_OF_BUFFER 121 -typedef int yy_ste_type; -static const short int yy_accept[341] = - { 0, - 0, 0, 0, 0, 0, 0, 119, 119, 0, 0, - 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 121, 19, 7, 18, 19, 16, - 1, 17, 19, 19, 15, 19, 67, 59, 60, 66, - 51, 67, 53, 67, 67, 67, 50, 49, 52, 67, - 120, 47, 119, 119, 28, 29, 28, 28, 28, 28, - 31, 30, 32, 73, 120, 69, 72, 70, 74, 88, - 89, 86, 87, 85, 75, 77, 76, 75, 81, 81, - - 80, 81, 83, 83, 84, 83, 99, 104, 105, 100, - 105, 103, 100, 100, 97, 98, 120, 33, 91, 90, - 22, 24, 23, 107, 109, 108, 111, 113, 114, 115, - 95, 95, 96, 95, 95, 95, 95, 38, 35, 34, - 38, 38, 44, 42, 45, 44, 44, 41, 41, 41, - 41, 40, 7, 18, 0, 16, 1, 17, 3, 14, - 8, 0, 12, 4, 0, 0, 5, 0, 15, 0, - 2, 59, 60, 0, 0, 0, 56, 0, 0, 55, - 55, 54, 117, 117, 117, 50, 49, 63, 50, 0, - 47, 46, 119, 119, 28, 28, 28, 28, 28, 31, - - 30, 72, 71, 85, 78, 79, 118, 118, 118, 82, - 99, 101, 100, 0, 102, 0, 100, 100, 0, 33, - 22, 20, 107, 106, 111, 112, 95, 95, 95, 92, - 95, 95, 95, 38, 35, 38, 38, 42, 0, 43, - 43, 43, 42, 40, 0, 13, 14, 8, 8, 0, - 12, 4, 0, 0, 0, 5, 0, 6, 0, 58, - 57, 0, 64, 0, 0, 55, 55, 65, 117, 117, - 63, 28, 28, 28, 25, 0, 118, 118, 100, 100, - 0, 21, 92, 92, 95, 95, 38, 38, 0, 39, - 43, 43, 0, 11, 4, 0, 11, 0, 0, 5, - - 0, 0, 0, 117, 28, 28, 118, 100, 100, 95, - 95, 38, 38, 43, 0, 9, 0, 0, 0, 28, - 28, 100, 100, 95, 95, 38, 38, 0, 0, 26, - 27, 93, 94, 93, 94, 36, 37, 10, 62, 0 - } ; - -static const YY_CHAR yy_ec[256] = - { 0, - 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, - 1, 3, 1, 1, 1, 1, 1, 1, 1, 1, - 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, - 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, - 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, - 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, - 1, 1, 1, 5, 1, 1, 1, 1, 1, 1, - 1, 1, 1, 1, 6, 7, 6, 6, 8, 1, - 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, - 9, 10, 6, 1, 11, 12, 13, 1, 1, 1, - - 1, 1, 1, 1, 1, 1, 14, 15, 16, 17, - 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, - 1, 1, 18, 1, 19, 1, 20, 1, 21, 22, - 23, 24, 25, 26, 16, 16, 16, 16, 16, 16, - 16, 16, 16, 16, 27, 28, 16, 29, 30, 31, - 28, 16, 32, 16, 16, 16, 16, 16, 16, 16, - 16, 33, 34, 35, 16, 16, 36, 37, 16, 1, - 1, 1, 38, 1, 1, 1, 1, 1, 1, 1, - 1, 1, 1, 1, 1, 1, 1, 1, 39, 1, - 1, 40, 21, 22, 23, 24, 25, 26, 16, 16, - - 16, 1, 1, 1, 1, 1, 1, 41, 27, 28, - 16, 29, 30, 31, 28, 16, 32, 1, 1, 1, - 1, 1, 1, 42, 1, 33, 34, 35, 16, 16, - 36, 37, 16, 1, 1, 1, 1, 1, 1, 43, - 43, 43, 43, 43, 43, 43, 43, 43, 43, 1, - 1, 1, 1, 1, 1 - } ; - -static const short int yy_base[404] = - { 0, - 0, 43, 85, 126, 1573, 1572, 1571, 1570, 168, 1558, - 97, 104, 211, 0, 1544, 1543, 99, 106, 118, 251, - 252, 254, 112, 114, 296, 0, 1549, 1548, 107, 111, - 140, 151, 153, 155, 253, 336, 378, 0, 339, 420, - 0, 0, 424, 465, 1550, 3243, 257, 3243, 1515, 0, - 265, 3243, 1538, 494, 0, 1540, 3243, 272, 3243, 3243, - 1495, 277, 3243, 1459, 534, 61, 343, 3243, 3243, 81, - 1496, 0, 1495, 3243, 0, 3243, 0, 1473, 1443, 1438, - 0, 281, 3243, 3243, 3243, 3243, 0, 1467, 3243, 3243, - 3243, 3243, 3243, 1434, 3243, 3243, 3243, 76, 3243, 1463, - - 3243, 242, 3243, 0, 3243, 314, 0, 3243, 1464, 0, - 330, 3243, 1448, 745, 3243, 3243, 777, 3243, 3243, 3243, - 0, 3243, 767, 0, 3243, 766, 0, 3243, 3243, 0, - 0, 350, 3243, 737, 0, 752, 739, 0, 286, 3243, - 750, 737, 3243, 357, 3243, 739, 318, 3243, 428, 738, - 327, 728, 364, 3243, 432, 0, 438, 3243, 3243, 372, - 442, 765, 446, 0, 451, 84, 0, 765, 0, 764, - 3243, 457, 3243, 763, 718, 732, 3243, 434, 438, 0, - 566, 3243, 3243, 0, 712, 480, 3243, 0, 3243, 750, - 0, 3243, 749, 3243, 0, 0, 725, 722, 609, 0, - - 484, 0, 3243, 707, 3243, 3243, 3243, 0, 706, 3243, - 0, 3243, 0, 456, 3243, 0, 721, 718, 742, 3243, - 0, 741, 0, 3243, 0, 3243, 0, 488, 703, 652, - 0, 709, 706, 0, 494, 707, 704, 499, 508, 3243, - 0, 689, 694, 688, 581, 3243, 518, 0, 603, 725, - 698, 0, 702, 693, 697, 0, 706, 3243, 705, 3243, - 3243, 671, 3243, 717, 669, 0, 0, 3243, 0, 655, - 0, 631, 573, 0, 3243, 577, 0, 537, 554, 507, - 529, 3243, 0, 0, 507, 500, 493, 485, 711, 3243, - 0, 471, 502, 3243, 0, 715, 3243, 472, 476, 0, - - 468, 740, 682, 3243, 469, 447, 3243, 455, 432, 440, - 426, 427, 414, 3243, 413, 3243, 415, 684, 688, 339, - 339, 258, 265, 238, 142, 128, 133, 121, 126, 0, - 0, 0, 0, 0, 0, 0, 0, 3243, 3243, 3243, - 783, 826, 869, 912, 955, 998, 1041, 1084, 1127, 1170, - 1213, 1256, 1299, 1342, 1385, 1428, 1460, 1503, 1535, 1578, - 1621, 1664, 1707, 1750, 1793, 1836, 1868, 1911, 1943, 1986, - 2029, 2072, 2115, 2147, 2190, 2233, 2276, 2319, 2362, 2405, - 2448, 2480, 2523, 2566, 2609, 2637, 2659, 2696, 2739, 2782, - 2805, 2848, 2871, 2914, 2937, 2980, 3012, 3044, 3067, 3110, - - 3133, 3176, 3199 - } ; - -static const short int yy_def[404] = - { 0, - 340, 340, 341, 341, 342, 342, 343, 343, 340, 9, - 344, 344, 340, 13, 345, 345, 346, 346, 347, 347, - 348, 348, 349, 349, 340, 25, 350, 350, 345, 345, - 351, 351, 352, 352, 353, 353, 340, 37, 354, 354, - 37, 37, 355, 356, 340, 340, 340, 340, 340, 357, - 340, 340, 340, 358, 359, 360, 340, 340, 340, 340, - 340, 340, 340, 361, 340, 362, 340, 340, 340, 340, - 363, 364, 365, 340, 366, 340, 367, 367, 367, 366, - 368, 340, 340, 340, 340, 340, 369, 340, 340, 340, - 340, 340, 340, 340, 340, 340, 340, 362, 340, 370, - - 340, 371, 340, 372, 340, 362, 373, 340, 340, 374, - 375, 340, 374, 374, 340, 340, 376, 340, 340, 340, - 377, 340, 340, 378, 340, 340, 379, 340, 340, 380, - 381, 381, 340, 381, 382, 382, 382, 383, 340, 340, - 383, 383, 340, 340, 340, 340, 384, 340, 340, 340, - 384, 340, 340, 340, 340, 357, 340, 340, 340, 340, - 385, 340, 340, 386, 340, 340, 387, 388, 359, 360, - 340, 340, 340, 389, 340, 340, 340, 361, 361, 390, - 390, 340, 340, 391, 340, 340, 340, 392, 340, 363, - 364, 340, 365, 340, 366, 367, 367, 367, 340, 368, - - 340, 369, 340, 340, 340, 340, 340, 393, 340, 340, - 373, 340, 374, 375, 340, 375, 374, 374, 376, 340, - 377, 394, 378, 340, 379, 340, 381, 381, 381, 340, - 382, 382, 382, 383, 340, 383, 383, 340, 340, 340, - 395, 340, 340, 340, 340, 340, 340, 385, 385, 396, - 340, 397, 396, 340, 340, 398, 388, 340, 389, 340, - 340, 340, 340, 361, 361, 390, 181, 340, 399, 340, - 392, 367, 367, 199, 340, 400, 401, 340, 374, 374, - 394, 340, 230, 402, 382, 382, 383, 383, 340, 340, - 403, 340, 396, 340, 397, 396, 340, 340, 340, 398, - - 340, 264, 361, 340, 367, 367, 340, 374, 374, 382, - 382, 383, 383, 340, 340, 340, 340, 361, 361, 367, - 367, 374, 374, 382, 382, 383, 383, 340, 340, 367, - 367, 374, 374, 382, 382, 383, 383, 340, 340, 0, - 340, 340, 340, 340, 340, 340, 340, 340, 340, 340, - 340, 340, 340, 340, 340, 340, 340, 340, 340, 340, - 340, 340, 340, 340, 340, 340, 340, 340, 340, 340, - 340, 340, 340, 340, 340, 340, 340, 340, 340, 340, - 340, 340, 340, 340, 340, 340, 340, 340, 340, 340, - 340, 340, 340, 340, 340, 340, 340, 340, 340, 340, - - 340, 340, 340 - } ; - -static const short int yy_nxt[3287] = - { 0, - 46, 47, 47, 48, 47, 46, 46, 46, 46, 46, - 46, 46, 46, 46, 49, 50, 46, 46, 46, 46, - 50, 50, 50, 50, 50, 50, 50, 50, 50, 50, - 50, 50, 50, 50, 50, 50, 50, 46, 46, 46, - 46, 46, 46, 46, 51, 51, 52, 51, 46, 46, - 46, 46, 46, 46, 46, 53, 46, 54, 55, 46, - 56, 46, 46, 55, 55, 55, 55, 55, 55, 55, - 55, 55, 55, 55, 55, 55, 55, 55, 55, 55, - 46, 46, 46, 46, 46, 46, 58, 58, 59, 58, - 60, 61, 60, 62, 60, 188, 184, 60, 82, 82, - - 83, 82, 91, 185, 63, 82, 82, 83, 82, 91, - 119, 184, 92, 254, 119, 85, 255, 85, 185, 92, - 189, 96, 64, 104, 65, 104, 66, 67, 67, 68, - 67, 60, 61, 60, 62, 60, 69, 97, 60, 93, - 70, 94, 339, 122, 338, 63, 93, 120, 94, 123, - 105, 120, 105, 106, 122, 106, 125, 337, 125, 98, - 123, 336, 126, 64, 126, 65, 335, 66, 75, 75, - 75, 76, 75, 75, 75, 75, 75, 75, 75, 75, - 75, 75, 75, 77, 75, 75, 75, 75, 77, 77, - 77, 77, 77, 77, 77, 77, 77, 77, 77, 78, - - 77, 77, 77, 77, 79, 75, 75, 75, 75, 75, - 75, 84, 84, 84, 85, 84, 84, 84, 84, 84, - 84, 84, 84, 84, 86, 84, 87, 88, 84, 84, - 84, 87, 87, 87, 87, 87, 87, 87, 87, 87, - 87, 87, 87, 87, 87, 87, 87, 87, 84, 84, - 84, 84, 84, 84, 96, 85, 128, 85, 153, 153, - 154, 153, 100, 101, 100, 101, 157, 157, 158, 157, - 97, 334, 129, 172, 172, 173, 172, 208, 177, 174, - 177, 177, 201, 201, 209, 201, 175, 235, 235, 333, - 235, 332, 98, 102, 130, 102, 107, 107, 107, 108, - - 107, 107, 107, 107, 107, 107, 107, 107, 109, 107, - 107, 110, 107, 107, 111, 112, 110, 110, 110, 110, - 110, 110, 110, 110, 110, 110, 110, 113, 110, 110, - 110, 110, 114, 107, 107, 115, 116, 107, 107, 128, - 139, 139, 140, 139, 186, 186, 187, 186, 215, 184, - 174, 228, 228, 241, 228, 129, 185, 175, 238, 238, - 242, 238, 241, 331, 229, 153, 153, 154, 153, 242, - 141, 216, 330, 247, 247, 142, 247, 130, 131, 132, - 132, 133, 132, 131, 131, 131, 131, 131, 131, 131, - 131, 131, 134, 135, 131, 131, 131, 131, 135, 135, - - 135, 135, 135, 135, 135, 135, 135, 135, 135, 136, - 135, 135, 135, 135, 137, 131, 131, 131, 131, 131, - 131, 139, 139, 140, 139, 144, 144, 145, 144, 243, - 243, 329, 243, 245, 245, 246, 245, 328, 146, 157, - 157, 158, 157, 249, 249, 327, 249, 251, 251, 326, - 251, 141, 245, 245, 246, 253, 142, 325, 172, 172, - 173, 172, 324, 323, 174, 147, 149, 149, 145, 149, - 244, 175, 263, 264, 215, 179, 178, 322, 321, 150, - 265, 186, 186, 187, 186, 201, 201, 174, 201, 228, - 228, 320, 228, 317, 175, 235, 235, 216, 235, 316, - - 238, 238, 229, 238, 315, 294, 151, 152, 161, 289, - 289, 290, 289, 240, 162, 313, 163, 312, 162, 247, - 247, 162, 247, 162, 162, 163, 164, 165, 166, 167, - 311, 310, 282, 168, 180, 180, 180, 309, 180, 180, - 180, 180, 180, 180, 180, 180, 180, 180, 180, 181, - 180, 180, 180, 180, 181, 181, 181, 181, 181, 181, - 181, 181, 181, 181, 181, 181, 181, 181, 181, 181, - 181, 180, 180, 180, 180, 180, 182, 267, 308, 207, - 275, 267, 245, 245, 246, 245, 267, 267, 267, 267, - 267, 267, 267, 267, 267, 267, 267, 267, 267, 267, - - 267, 267, 267, 306, 249, 249, 268, 249, 267, 274, - 274, 274, 275, 274, 274, 274, 274, 274, 274, 274, - 274, 274, 274, 274, 276, 274, 274, 274, 274, 276, - 276, 276, 276, 276, 276, 276, 276, 276, 276, 276, - 276, 276, 276, 276, 276, 276, 274, 274, 274, 274, - 274, 274, 283, 283, 283, 305, 283, 283, 283, 283, - 283, 283, 283, 283, 283, 283, 283, 284, 283, 283, - 283, 283, 284, 284, 284, 284, 284, 284, 284, 284, - 284, 284, 284, 284, 284, 284, 284, 284, 284, 283, - 283, 283, 283, 283, 283, 243, 243, 183, 243, 251, - - 251, 301, 251, 296, 296, 297, 296, 263, 260, 258, - 179, 303, 289, 289, 290, 289, 296, 296, 297, 296, - 263, 299, 263, 179, 319, 179, 263, 298, 294, 179, - 244, 292, 288, 287, 286, 285, 244, 302, 302, 302, - 302, 302, 302, 230, 282, 220, 280, 279, 278, 204, - 273, 272, 194, 191, 270, 263, 262, 261, 179, 302, - 318, 318, 318, 318, 318, 318, 260, 171, 258, 250, - 244, 239, 239, 237, 236, 233, 232, 230, 224, 222, - 220, 218, 318, 57, 57, 57, 57, 57, 57, 57, - 57, 57, 57, 57, 57, 57, 57, 57, 57, 57, - - 57, 57, 57, 57, 57, 57, 57, 57, 57, 57, - 57, 57, 57, 57, 57, 57, 57, 57, 57, 57, - 57, 57, 57, 57, 57, 57, 71, 71, 71, 71, - 71, 71, 71, 71, 71, 71, 71, 71, 71, 71, - 71, 71, 71, 71, 71, 71, 71, 71, 71, 71, - 71, 71, 71, 71, 71, 71, 71, 71, 71, 71, - 71, 71, 71, 71, 71, 71, 71, 71, 71, 73, - 73, 73, 73, 73, 73, 73, 73, 73, 73, 73, - 73, 73, 73, 73, 73, 73, 73, 73, 73, 73, - 73, 73, 73, 73, 73, 73, 73, 73, 73, 73, - - 73, 73, 73, 73, 73, 73, 73, 73, 73, 73, - 73, 73, 81, 81, 81, 81, 81, 81, 81, 81, - 81, 81, 81, 81, 81, 81, 81, 81, 81, 81, - 81, 81, 81, 81, 81, 81, 81, 81, 81, 81, - 81, 81, 81, 81, 81, 81, 81, 81, 81, 81, - 81, 81, 81, 81, 81, 85, 85, 85, 85, 85, - 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, - 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, - 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, - 85, 85, 85, 85, 85, 85, 85, 85, 90, 90, - - 90, 90, 90, 90, 90, 90, 90, 90, 90, 90, - 90, 90, 90, 90, 90, 90, 90, 90, 90, 90, - 90, 90, 90, 90, 90, 90, 90, 90, 90, 90, - 90, 90, 90, 90, 90, 90, 90, 90, 90, 90, - 90, 95, 95, 95, 95, 95, 95, 95, 95, 95, - 95, 95, 95, 95, 95, 95, 95, 95, 95, 95, - 95, 95, 95, 95, 95, 95, 95, 95, 95, 95, - 95, 95, 95, 95, 95, 95, 95, 95, 95, 95, - 95, 95, 95, 95, 99, 99, 99, 99, 99, 99, - 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, - - 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, - 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, - 99, 99, 99, 99, 99, 99, 99, 103, 103, 103, - 103, 103, 103, 103, 103, 103, 103, 103, 103, 103, - 103, 103, 103, 103, 103, 103, 103, 103, 103, 103, - 103, 103, 103, 103, 103, 103, 103, 103, 103, 103, - 103, 103, 103, 103, 103, 103, 103, 103, 103, 103, - 117, 117, 117, 117, 117, 117, 117, 117, 117, 117, - 117, 117, 117, 117, 117, 117, 117, 117, 117, 117, - 117, 117, 117, 117, 117, 117, 117, 117, 117, 117, - - 117, 117, 117, 117, 117, 117, 117, 117, 117, 117, - 117, 117, 117, 121, 121, 121, 121, 121, 121, 121, - 121, 121, 121, 121, 121, 121, 121, 121, 121, 121, - 121, 121, 121, 121, 121, 121, 121, 121, 121, 121, - 121, 121, 121, 121, 121, 121, 121, 121, 121, 121, - 121, 121, 121, 121, 121, 121, 124, 124, 124, 124, - 124, 124, 124, 124, 124, 124, 124, 124, 124, 124, - 124, 124, 124, 124, 124, 124, 124, 124, 124, 124, - 124, 124, 124, 124, 124, 124, 124, 124, 124, 124, - 124, 124, 124, 124, 124, 124, 124, 124, 124, 127, - - 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, - 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, - 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, - 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, - 127, 127, 138, 138, 138, 138, 138, 138, 138, 138, - 138, 138, 138, 138, 138, 138, 138, 138, 138, 138, - 138, 138, 138, 138, 138, 138, 138, 138, 138, 138, - 138, 138, 138, 138, 138, 138, 138, 138, 138, 138, - 138, 138, 138, 138, 138, 143, 143, 143, 143, 143, - 143, 143, 143, 143, 143, 143, 143, 143, 143, 143, - - 143, 143, 143, 143, 143, 143, 143, 143, 143, 143, - 143, 143, 143, 143, 143, 143, 143, 143, 143, 143, - 143, 143, 143, 143, 143, 143, 143, 143, 148, 148, - 148, 148, 148, 148, 148, 148, 148, 148, 148, 148, - 148, 148, 148, 148, 148, 148, 148, 148, 148, 148, - 148, 148, 148, 148, 148, 148, 148, 148, 148, 148, - 148, 148, 148, 148, 148, 148, 148, 148, 148, 148, - 148, 156, 217, 212, 206, 156, 204, 203, 199, 198, - 156, 156, 156, 156, 156, 156, 156, 156, 156, 156, - 156, 156, 156, 156, 156, 156, 156, 197, 194, 191, - - 179, 176, 156, 160, 160, 160, 160, 160, 160, 160, - 160, 160, 160, 160, 160, 160, 160, 160, 160, 160, - 160, 160, 160, 160, 160, 160, 160, 160, 160, 160, - 160, 160, 160, 160, 160, 160, 160, 160, 160, 160, - 160, 160, 160, 171, 160, 160, 169, 159, 155, 340, - 169, 118, 118, 89, 89, 169, 169, 169, 169, 169, - 169, 169, 169, 169, 169, 169, 169, 169, 169, 169, - 169, 169, 80, 74, 74, 72, 72, 169, 170, 170, - 170, 170, 170, 170, 170, 170, 170, 170, 170, 170, - 170, 170, 170, 170, 170, 170, 170, 170, 170, 170, - - 170, 170, 170, 170, 170, 170, 170, 170, 170, 170, - 170, 170, 170, 170, 170, 170, 170, 170, 170, 170, - 170, 178, 178, 178, 340, 178, 178, 178, 178, 178, - 178, 178, 178, 178, 178, 178, 178, 178, 178, 178, - 178, 178, 178, 178, 178, 178, 178, 178, 178, 178, - 178, 178, 178, 178, 178, 178, 178, 178, 178, 340, - 178, 178, 178, 178, 183, 183, 183, 340, 183, 183, - 183, 183, 183, 183, 183, 183, 183, 183, 183, 183, - 183, 183, 183, 183, 183, 183, 183, 183, 183, 183, - 183, 183, 183, 183, 183, 183, 183, 183, 183, 183, - - 183, 183, 183, 183, 183, 183, 183, 190, 190, 190, - 190, 190, 190, 190, 190, 190, 190, 190, 190, 190, - 190, 190, 190, 190, 190, 190, 190, 190, 190, 190, - 190, 190, 190, 190, 190, 190, 190, 190, 190, 190, - 190, 190, 190, 190, 190, 190, 190, 190, 190, 190, - 192, 340, 340, 340, 340, 192, 192, 192, 192, 192, - 192, 192, 192, 192, 192, 192, 192, 192, 192, 192, - 192, 192, 192, 192, 192, 192, 192, 192, 192, 192, - 192, 192, 192, 192, 192, 192, 192, 192, 192, 192, - 192, 192, 192, 193, 193, 193, 193, 193, 193, 193, - - 193, 193, 193, 193, 193, 193, 193, 193, 193, 193, - 193, 193, 193, 193, 193, 193, 193, 193, 193, 193, - 193, 193, 193, 193, 193, 193, 193, 193, 193, 193, - 193, 193, 193, 193, 193, 193, 195, 195, 195, 340, - 195, 195, 195, 195, 195, 195, 195, 195, 195, 195, - 195, 340, 195, 195, 195, 195, 340, 340, 340, 340, - 340, 340, 340, 340, 340, 340, 340, 340, 340, 340, - 340, 340, 340, 195, 195, 195, 195, 195, 195, 196, - 340, 340, 340, 196, 340, 340, 340, 340, 196, 196, - 196, 196, 196, 196, 196, 196, 196, 196, 196, 196, - - 196, 196, 196, 196, 196, 340, 340, 340, 340, 340, - 196, 200, 200, 200, 340, 200, 200, 200, 200, 200, - 200, 200, 200, 200, 200, 200, 200, 200, 200, 200, - 200, 200, 200, 200, 200, 200, 200, 200, 200, 200, - 200, 200, 200, 200, 200, 200, 200, 200, 200, 200, - 200, 200, 200, 200, 202, 340, 340, 340, 202, 340, - 340, 340, 340, 202, 202, 202, 202, 202, 202, 202, - 202, 202, 202, 202, 202, 202, 202, 202, 202, 202, - 340, 340, 340, 340, 340, 202, 205, 205, 205, 340, - 205, 205, 205, 205, 205, 205, 205, 205, 205, 205, - - 205, 205, 205, 205, 205, 205, 205, 205, 205, 205, - 205, 205, 205, 205, 205, 205, 205, 205, 205, 205, - 205, 205, 205, 205, 205, 205, 205, 205, 205, 207, - 207, 207, 340, 207, 207, 207, 207, 207, 207, 207, - 207, 207, 207, 207, 207, 207, 207, 207, 207, 207, - 207, 207, 207, 207, 207, 207, 207, 207, 207, 207, - 207, 207, 207, 207, 207, 207, 207, 207, 207, 207, - 207, 207, 210, 210, 210, 340, 210, 210, 210, 210, - 210, 210, 210, 210, 210, 210, 210, 210, 210, 210, - 210, 210, 210, 210, 210, 210, 210, 210, 210, 210, - - 210, 210, 210, 210, 210, 210, 210, 210, 210, 210, - 340, 210, 210, 210, 210, 211, 211, 211, 340, 211, - 211, 211, 211, 211, 211, 211, 211, 340, 211, 211, - 340, 211, 211, 340, 340, 340, 340, 340, 340, 340, - 340, 340, 340, 340, 340, 340, 340, 340, 340, 340, - 340, 340, 211, 211, 340, 340, 211, 211, 213, 340, - 340, 340, 213, 340, 340, 340, 340, 213, 213, 213, - 213, 213, 213, 213, 213, 213, 213, 213, 213, 213, - 213, 213, 213, 213, 340, 340, 340, 340, 340, 213, - 214, 214, 214, 340, 214, 214, 214, 214, 214, 214, - - 214, 214, 214, 214, 214, 214, 214, 214, 214, 214, - 214, 214, 214, 214, 214, 214, 214, 214, 214, 214, - 214, 214, 214, 214, 214, 214, 214, 214, 214, 214, - 214, 214, 214, 219, 219, 219, 219, 219, 219, 219, - 219, 219, 219, 219, 219, 219, 219, 219, 219, 219, - 219, 219, 219, 219, 219, 219, 219, 219, 219, 219, - 219, 219, 219, 219, 219, 219, 219, 219, 219, 219, - 219, 219, 219, 219, 219, 219, 221, 221, 221, 340, - 221, 221, 221, 221, 221, 340, 221, 221, 221, 221, - 221, 221, 221, 221, 221, 221, 221, 221, 221, 221, - - 221, 221, 221, 221, 221, 221, 221, 221, 221, 221, - 221, 221, 221, 221, 221, 221, 221, 221, 221, 223, - 223, 223, 340, 223, 223, 223, 223, 223, 340, 223, - 223, 223, 223, 223, 223, 223, 223, 223, 223, 223, - 223, 223, 223, 223, 223, 223, 223, 223, 223, 223, - 223, 223, 223, 223, 223, 223, 223, 223, 223, 223, - 223, 223, 225, 225, 225, 340, 225, 225, 225, 225, - 225, 225, 225, 225, 225, 225, 225, 225, 225, 225, - 225, 340, 225, 225, 225, 225, 225, 225, 225, 225, - 225, 225, 225, 225, 225, 225, 225, 225, 225, 225, - - 225, 225, 225, 340, 225, 226, 226, 226, 340, 226, - 226, 226, 226, 226, 226, 226, 226, 226, 226, 226, - 226, 226, 226, 226, 226, 226, 226, 226, 226, 226, - 226, 226, 226, 226, 226, 226, 226, 226, 226, 226, - 226, 226, 226, 226, 226, 226, 226, 226, 227, 227, - 227, 340, 227, 227, 227, 227, 227, 227, 227, 227, - 227, 227, 227, 340, 227, 227, 227, 227, 340, 340, - 340, 340, 340, 340, 340, 340, 340, 340, 340, 340, - 340, 340, 340, 340, 340, 227, 227, 227, 227, 227, - 227, 231, 340, 340, 340, 231, 340, 340, 340, 340, - - 231, 231, 231, 231, 231, 231, 231, 231, 231, 231, - 231, 231, 231, 231, 231, 231, 231, 340, 340, 340, - 340, 340, 231, 234, 340, 340, 340, 340, 234, 234, - 234, 234, 234, 234, 234, 234, 234, 234, 234, 234, - 234, 234, 234, 234, 234, 234, 234, 234, 234, 234, - 234, 234, 234, 234, 234, 234, 234, 234, 234, 234, - 234, 234, 234, 234, 234, 234, 240, 240, 240, 340, - 240, 240, 240, 240, 240, 240, 240, 240, 240, 240, - 240, 240, 240, 240, 240, 240, 240, 240, 240, 240, - 240, 240, 240, 240, 240, 240, 240, 240, 240, 240, - - 240, 240, 240, 240, 240, 240, 240, 240, 240, 248, - 248, 248, 340, 248, 248, 248, 248, 248, 248, 248, - 248, 248, 248, 248, 248, 248, 248, 248, 248, 248, - 248, 248, 248, 248, 248, 248, 248, 248, 248, 248, - 248, 248, 248, 248, 248, 248, 248, 248, 248, 248, - 248, 248, 252, 340, 340, 340, 340, 252, 252, 252, - 252, 252, 252, 252, 252, 252, 252, 252, 252, 252, - 252, 252, 252, 252, 256, 340, 340, 340, 340, 256, - 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, - 256, 256, 256, 256, 256, 256, 257, 257, 257, 257, - - 257, 257, 257, 257, 257, 257, 257, 257, 257, 257, - 257, 257, 257, 257, 257, 257, 257, 257, 257, 257, - 257, 257, 257, 257, 257, 257, 257, 257, 257, 257, - 257, 257, 257, 257, 257, 257, 257, 257, 257, 259, - 259, 259, 259, 259, 259, 259, 259, 259, 259, 259, - 259, 259, 259, 259, 259, 259, 259, 259, 259, 259, - 259, 259, 259, 259, 259, 259, 259, 259, 259, 259, - 259, 259, 259, 259, 259, 259, 259, 259, 259, 259, - 259, 259, 266, 266, 266, 340, 266, 266, 266, 266, - 266, 266, 266, 266, 266, 266, 266, 266, 266, 266, - - 266, 266, 266, 266, 266, 266, 266, 266, 266, 266, - 266, 266, 266, 266, 266, 266, 266, 266, 266, 266, - 266, 266, 340, 266, 266, 269, 269, 269, 269, 269, - 269, 340, 340, 340, 340, 340, 340, 340, 340, 340, - 340, 340, 340, 340, 340, 340, 340, 269, 271, 271, - 271, 340, 271, 271, 271, 271, 271, 271, 271, 271, - 271, 271, 271, 271, 271, 271, 271, 271, 271, 271, - 271, 271, 271, 271, 271, 271, 271, 271, 271, 271, - 271, 271, 271, 271, 271, 271, 271, 271, 271, 271, - 271, 277, 277, 277, 277, 277, 277, 340, 340, 340, - - 340, 340, 340, 340, 340, 340, 340, 340, 340, 340, - 340, 340, 340, 277, 281, 281, 281, 281, 281, 281, - 281, 281, 281, 281, 281, 281, 281, 281, 281, 281, - 281, 281, 281, 281, 281, 281, 281, 281, 281, 281, - 281, 281, 281, 281, 281, 281, 281, 281, 281, 281, - 281, 281, 281, 281, 281, 281, 281, 291, 291, 291, - 291, 291, 291, 340, 340, 340, 340, 340, 340, 340, - 340, 340, 340, 340, 340, 340, 340, 340, 340, 291, - 293, 293, 293, 293, 293, 293, 293, 293, 293, 293, - 293, 293, 293, 293, 293, 293, 293, 293, 293, 293, - - 293, 293, 293, 293, 293, 293, 293, 293, 293, 293, - 293, 293, 293, 293, 293, 293, 293, 293, 293, 293, - 293, 293, 293, 295, 340, 340, 340, 295, 340, 340, - 340, 340, 295, 295, 295, 295, 295, 295, 295, 295, - 295, 295, 295, 295, 295, 295, 295, 295, 295, 340, - 340, 340, 340, 340, 295, 300, 340, 340, 340, 300, - 340, 340, 340, 340, 300, 300, 300, 300, 300, 300, - 300, 300, 300, 300, 300, 300, 300, 300, 300, 300, - 300, 340, 340, 340, 340, 340, 300, 304, 304, 304, - 304, 304, 304, 340, 340, 340, 340, 340, 340, 340, - - 340, 340, 340, 340, 340, 340, 340, 340, 340, 304, - 276, 276, 276, 276, 276, 276, 276, 276, 276, 276, - 276, 276, 276, 276, 276, 276, 276, 276, 276, 276, - 276, 276, 276, 276, 276, 276, 276, 276, 276, 276, - 276, 276, 276, 276, 276, 276, 276, 276, 276, 276, - 276, 276, 276, 307, 307, 307, 307, 307, 307, 340, - 340, 340, 340, 340, 340, 340, 340, 340, 340, 340, - 340, 340, 340, 340, 340, 307, 284, 284, 284, 340, - 284, 284, 284, 284, 284, 284, 284, 284, 284, 284, - 284, 284, 284, 284, 284, 284, 284, 284, 284, 284, - - 284, 284, 284, 284, 284, 284, 284, 284, 284, 284, - 284, 284, 284, 284, 284, 284, 284, 284, 284, 314, - 314, 314, 314, 314, 314, 340, 340, 340, 340, 340, - 340, 340, 340, 340, 340, 340, 340, 340, 340, 340, - 340, 314, 45, 340, 340, 340, 340, 340, 340, 340, - 340, 340, 340, 340, 340, 340, 340, 340, 340, 340, - 340, 340, 340, 340, 340, 340, 340, 340, 340, 340, - 340, 340, 340, 340, 340, 340, 340, 340, 340, 340, - 340, 340, 340, 340, 340, 340 - } ; - -static const short int yy_chk[3287] = - { 0, - 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, - 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, - 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, - 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, - 1, 1, 1, 2, 2, 2, 2, 2, 2, 2, - 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, - 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, - 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, - 2, 2, 2, 2, 2, 2, 3, 3, 3, 3, - 3, 3, 3, 3, 3, 70, 66, 3, 11, 11, - - 11, 11, 17, 66, 3, 12, 12, 12, 12, 18, - 29, 98, 17, 166, 30, 23, 166, 24, 98, 18, - 70, 19, 3, 23, 3, 24, 3, 4, 4, 4, - 4, 4, 4, 4, 4, 4, 4, 19, 4, 17, - 4, 17, 329, 31, 328, 4, 18, 29, 18, 31, - 23, 30, 24, 23, 32, 24, 33, 327, 34, 19, - 32, 326, 33, 4, 34, 4, 325, 4, 9, 9, - 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, - 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, - 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, - - 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, - 9, 13, 13, 13, 13, 13, 13, 13, 13, 13, - 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, - 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, - 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, - 13, 13, 13, 13, 20, 21, 35, 22, 47, 47, - 47, 47, 21, 21, 22, 22, 51, 51, 51, 51, - 20, 324, 35, 58, 58, 58, 58, 102, 62, 58, - 62, 62, 82, 82, 102, 82, 58, 139, 139, 323, - 139, 322, 20, 21, 35, 22, 25, 25, 25, 25, - - 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, - 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, - 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, - 25, 25, 25, 25, 25, 25, 25, 25, 25, 36, - 39, 39, 39, 39, 67, 67, 67, 67, 111, 106, - 67, 132, 132, 147, 132, 36, 106, 67, 144, 144, - 147, 144, 151, 321, 132, 153, 153, 153, 153, 151, - 39, 111, 320, 160, 160, 39, 160, 36, 37, 37, - 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, - 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, - - 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, - 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, - 37, 40, 40, 40, 40, 43, 43, 43, 43, 149, - 149, 317, 149, 155, 155, 155, 155, 315, 43, 157, - 157, 157, 157, 161, 161, 313, 161, 163, 163, 312, - 163, 40, 165, 165, 165, 165, 40, 311, 172, 172, - 172, 172, 310, 309, 172, 43, 44, 44, 44, 44, - 149, 172, 178, 179, 214, 178, 179, 308, 306, 44, - 179, 186, 186, 186, 186, 201, 201, 186, 201, 228, - 228, 305, 228, 301, 186, 235, 235, 214, 235, 299, - - 238, 238, 228, 238, 298, 293, 44, 44, 54, 239, - 239, 239, 239, 292, 54, 288, 54, 287, 54, 247, - 247, 54, 247, 54, 54, 54, 54, 54, 54, 54, - 286, 285, 281, 54, 65, 65, 65, 280, 65, 65, - 65, 65, 65, 65, 65, 65, 65, 65, 65, 65, - 65, 65, 65, 65, 65, 65, 65, 65, 65, 65, - 65, 65, 65, 65, 65, 65, 65, 65, 65, 65, - 65, 65, 65, 65, 65, 65, 65, 181, 279, 278, - 276, 181, 245, 245, 245, 245, 181, 181, 181, 181, - 181, 181, 181, 181, 181, 181, 181, 181, 181, 181, - - 181, 181, 181, 273, 249, 249, 181, 249, 181, 199, - 199, 199, 199, 199, 199, 199, 199, 199, 199, 199, - 199, 199, 199, 199, 199, 199, 199, 199, 199, 199, - 199, 199, 199, 199, 199, 199, 199, 199, 199, 199, - 199, 199, 199, 199, 199, 199, 199, 199, 199, 199, - 199, 199, 230, 230, 230, 272, 230, 230, 230, 230, - 230, 230, 230, 230, 230, 230, 230, 230, 230, 230, - 230, 230, 230, 230, 230, 230, 230, 230, 230, 230, - 230, 230, 230, 230, 230, 230, 230, 230, 230, 230, - 230, 230, 230, 230, 230, 243, 243, 270, 243, 251, - - 251, 262, 251, 253, 253, 253, 253, 265, 259, 257, - 265, 265, 289, 289, 289, 289, 296, 296, 296, 296, - 303, 255, 318, 303, 303, 318, 319, 254, 250, 319, - 244, 242, 237, 236, 233, 232, 243, 264, 264, 264, - 264, 264, 264, 229, 222, 219, 218, 217, 209, 204, - 198, 197, 193, 190, 185, 264, 176, 175, 264, 264, - 302, 302, 302, 302, 302, 302, 174, 170, 168, 162, - 152, 150, 146, 142, 141, 137, 136, 134, 126, 123, - 117, 114, 302, 341, 341, 341, 341, 341, 341, 341, - 341, 341, 341, 341, 341, 341, 341, 341, 341, 341, - - 341, 341, 341, 341, 341, 341, 341, 341, 341, 341, - 341, 341, 341, 341, 341, 341, 341, 341, 341, 341, - 341, 341, 341, 341, 341, 341, 342, 342, 342, 342, - 342, 342, 342, 342, 342, 342, 342, 342, 342, 342, - 342, 342, 342, 342, 342, 342, 342, 342, 342, 342, - 342, 342, 342, 342, 342, 342, 342, 342, 342, 342, - 342, 342, 342, 342, 342, 342, 342, 342, 342, 343, - 343, 343, 343, 343, 343, 343, 343, 343, 343, 343, - 343, 343, 343, 343, 343, 343, 343, 343, 343, 343, - 343, 343, 343, 343, 343, 343, 343, 343, 343, 343, - - 343, 343, 343, 343, 343, 343, 343, 343, 343, 343, - 343, 343, 344, 344, 344, 344, 344, 344, 344, 344, - 344, 344, 344, 344, 344, 344, 344, 344, 344, 344, - 344, 344, 344, 344, 344, 344, 344, 344, 344, 344, - 344, 344, 344, 344, 344, 344, 344, 344, 344, 344, - 344, 344, 344, 344, 344, 345, 345, 345, 345, 345, - 345, 345, 345, 345, 345, 345, 345, 345, 345, 345, - 345, 345, 345, 345, 345, 345, 345, 345, 345, 345, - 345, 345, 345, 345, 345, 345, 345, 345, 345, 345, - 345, 345, 345, 345, 345, 345, 345, 345, 346, 346, - - 346, 346, 346, 346, 346, 346, 346, 346, 346, 346, - 346, 346, 346, 346, 346, 346, 346, 346, 346, 346, - 346, 346, 346, 346, 346, 346, 346, 346, 346, 346, - 346, 346, 346, 346, 346, 346, 346, 346, 346, 346, - 346, 347, 347, 347, 347, 347, 347, 347, 347, 347, - 347, 347, 347, 347, 347, 347, 347, 347, 347, 347, - 347, 347, 347, 347, 347, 347, 347, 347, 347, 347, - 347, 347, 347, 347, 347, 347, 347, 347, 347, 347, - 347, 347, 347, 347, 348, 348, 348, 348, 348, 348, - 348, 348, 348, 348, 348, 348, 348, 348, 348, 348, - - 348, 348, 348, 348, 348, 348, 348, 348, 348, 348, - 348, 348, 348, 348, 348, 348, 348, 348, 348, 348, - 348, 348, 348, 348, 348, 348, 348, 349, 349, 349, - 349, 349, 349, 349, 349, 349, 349, 349, 349, 349, - 349, 349, 349, 349, 349, 349, 349, 349, 349, 349, - 349, 349, 349, 349, 349, 349, 349, 349, 349, 349, - 349, 349, 349, 349, 349, 349, 349, 349, 349, 349, - 350, 350, 350, 350, 350, 350, 350, 350, 350, 350, - 350, 350, 350, 350, 350, 350, 350, 350, 350, 350, - 350, 350, 350, 350, 350, 350, 350, 350, 350, 350, - - 350, 350, 350, 350, 350, 350, 350, 350, 350, 350, - 350, 350, 350, 351, 351, 351, 351, 351, 351, 351, - 351, 351, 351, 351, 351, 351, 351, 351, 351, 351, - 351, 351, 351, 351, 351, 351, 351, 351, 351, 351, - 351, 351, 351, 351, 351, 351, 351, 351, 351, 351, - 351, 351, 351, 351, 351, 351, 352, 352, 352, 352, - 352, 352, 352, 352, 352, 352, 352, 352, 352, 352, - 352, 352, 352, 352, 352, 352, 352, 352, 352, 352, - 352, 352, 352, 352, 352, 352, 352, 352, 352, 352, - 352, 352, 352, 352, 352, 352, 352, 352, 352, 353, - - 353, 353, 353, 353, 353, 353, 353, 353, 353, 353, - 353, 353, 353, 353, 353, 353, 353, 353, 353, 353, - 353, 353, 353, 353, 353, 353, 353, 353, 353, 353, - 353, 353, 353, 353, 353, 353, 353, 353, 353, 353, - 353, 353, 354, 354, 354, 354, 354, 354, 354, 354, - 354, 354, 354, 354, 354, 354, 354, 354, 354, 354, - 354, 354, 354, 354, 354, 354, 354, 354, 354, 354, - 354, 354, 354, 354, 354, 354, 354, 354, 354, 354, - 354, 354, 354, 354, 354, 355, 355, 355, 355, 355, - 355, 355, 355, 355, 355, 355, 355, 355, 355, 355, - - 355, 355, 355, 355, 355, 355, 355, 355, 355, 355, - 355, 355, 355, 355, 355, 355, 355, 355, 355, 355, - 355, 355, 355, 355, 355, 355, 355, 355, 356, 356, - 356, 356, 356, 356, 356, 356, 356, 356, 356, 356, - 356, 356, 356, 356, 356, 356, 356, 356, 356, 356, - 356, 356, 356, 356, 356, 356, 356, 356, 356, 356, - 356, 356, 356, 356, 356, 356, 356, 356, 356, 356, - 356, 357, 113, 109, 100, 357, 94, 88, 80, 79, - 357, 357, 357, 357, 357, 357, 357, 357, 357, 357, - 357, 357, 357, 357, 357, 357, 357, 78, 73, 71, - - 64, 61, 357, 358, 358, 358, 358, 358, 358, 358, - 358, 358, 358, 358, 358, 358, 358, 358, 358, 358, - 358, 358, 358, 358, 358, 358, 358, 358, 358, 358, - 358, 358, 358, 358, 358, 358, 358, 358, 358, 358, - 358, 358, 358, 56, 358, 358, 359, 53, 49, 45, - 359, 28, 27, 16, 15, 359, 359, 359, 359, 359, - 359, 359, 359, 359, 359, 359, 359, 359, 359, 359, - 359, 359, 10, 8, 7, 6, 5, 359, 360, 360, - 360, 360, 360, 360, 360, 360, 360, 360, 360, 360, - 360, 360, 360, 360, 360, 360, 360, 360, 360, 360, - - 360, 360, 360, 360, 360, 360, 360, 360, 360, 360, - 360, 360, 360, 360, 360, 360, 360, 360, 360, 360, - 360, 361, 361, 361, 0, 361, 361, 361, 361, 361, - 361, 361, 361, 361, 361, 361, 361, 361, 361, 361, - 361, 361, 361, 361, 361, 361, 361, 361, 361, 361, - 361, 361, 361, 361, 361, 361, 361, 361, 361, 0, - 361, 361, 361, 361, 362, 362, 362, 0, 362, 362, - 362, 362, 362, 362, 362, 362, 362, 362, 362, 362, - 362, 362, 362, 362, 362, 362, 362, 362, 362, 362, - 362, 362, 362, 362, 362, 362, 362, 362, 362, 362, - - 362, 362, 362, 362, 362, 362, 362, 363, 363, 363, - 363, 363, 363, 363, 363, 363, 363, 363, 363, 363, - 363, 363, 363, 363, 363, 363, 363, 363, 363, 363, - 363, 363, 363, 363, 363, 363, 363, 363, 363, 363, - 363, 363, 363, 363, 363, 363, 363, 363, 363, 363, - 364, 0, 0, 0, 0, 364, 364, 364, 364, 364, - 364, 364, 364, 364, 364, 364, 364, 364, 364, 364, - 364, 364, 364, 364, 364, 364, 364, 364, 364, 364, - 364, 364, 364, 364, 364, 364, 364, 364, 364, 364, - 364, 364, 364, 365, 365, 365, 365, 365, 365, 365, - - 365, 365, 365, 365, 365, 365, 365, 365, 365, 365, - 365, 365, 365, 365, 365, 365, 365, 365, 365, 365, - 365, 365, 365, 365, 365, 365, 365, 365, 365, 365, - 365, 365, 365, 365, 365, 365, 366, 366, 366, 0, - 366, 366, 366, 366, 366, 366, 366, 366, 366, 366, - 366, 0, 366, 366, 366, 366, 0, 0, 0, 0, - 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 366, 366, 366, 366, 366, 366, 367, - 0, 0, 0, 367, 0, 0, 0, 0, 367, 367, - 367, 367, 367, 367, 367, 367, 367, 367, 367, 367, - - 367, 367, 367, 367, 367, 0, 0, 0, 0, 0, - 367, 368, 368, 368, 0, 368, 368, 368, 368, 368, - 368, 368, 368, 368, 368, 368, 368, 368, 368, 368, - 368, 368, 368, 368, 368, 368, 368, 368, 368, 368, - 368, 368, 368, 368, 368, 368, 368, 368, 368, 368, - 368, 368, 368, 368, 369, 0, 0, 0, 369, 0, - 0, 0, 0, 369, 369, 369, 369, 369, 369, 369, - 369, 369, 369, 369, 369, 369, 369, 369, 369, 369, - 0, 0, 0, 0, 0, 369, 370, 370, 370, 0, - 370, 370, 370, 370, 370, 370, 370, 370, 370, 370, - - 370, 370, 370, 370, 370, 370, 370, 370, 370, 370, - 370, 370, 370, 370, 370, 370, 370, 370, 370, 370, - 370, 370, 370, 370, 370, 370, 370, 370, 370, 371, - 371, 371, 0, 371, 371, 371, 371, 371, 371, 371, - 371, 371, 371, 371, 371, 371, 371, 371, 371, 371, - 371, 371, 371, 371, 371, 371, 371, 371, 371, 371, - 371, 371, 371, 371, 371, 371, 371, 371, 371, 371, - 371, 371, 372, 372, 372, 0, 372, 372, 372, 372, - 372, 372, 372, 372, 372, 372, 372, 372, 372, 372, - 372, 372, 372, 372, 372, 372, 372, 372, 372, 372, - - 372, 372, 372, 372, 372, 372, 372, 372, 372, 372, - 0, 372, 372, 372, 372, 373, 373, 373, 0, 373, - 373, 373, 373, 373, 373, 373, 373, 0, 373, 373, - 0, 373, 373, 0, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, - 0, 0, 373, 373, 0, 0, 373, 373, 374, 0, - 0, 0, 374, 0, 0, 0, 0, 374, 374, 374, - 374, 374, 374, 374, 374, 374, 374, 374, 374, 374, - 374, 374, 374, 374, 0, 0, 0, 0, 0, 374, - 375, 375, 375, 0, 375, 375, 375, 375, 375, 375, - - 375, 375, 375, 375, 375, 375, 375, 375, 375, 375, - 375, 375, 375, 375, 375, 375, 375, 375, 375, 375, - 375, 375, 375, 375, 375, 375, 375, 375, 375, 375, - 375, 375, 375, 376, 376, 376, 376, 376, 376, 376, - 376, 376, 376, 376, 376, 376, 376, 376, 376, 376, - 376, 376, 376, 376, 376, 376, 376, 376, 376, 376, - 376, 376, 376, 376, 376, 376, 376, 376, 376, 376, - 376, 376, 376, 376, 376, 376, 377, 377, 377, 0, - 377, 377, 377, 377, 377, 0, 377, 377, 377, 377, - 377, 377, 377, 377, 377, 377, 377, 377, 377, 377, - - 377, 377, 377, 377, 377, 377, 377, 377, 377, 377, - 377, 377, 377, 377, 377, 377, 377, 377, 377, 378, - 378, 378, 0, 378, 378, 378, 378, 378, 0, 378, - 378, 378, 378, 378, 378, 378, 378, 378, 378, 378, - 378, 378, 378, 378, 378, 378, 378, 378, 378, 378, - 378, 378, 378, 378, 378, 378, 378, 378, 378, 378, - 378, 378, 379, 379, 379, 0, 379, 379, 379, 379, - 379, 379, 379, 379, 379, 379, 379, 379, 379, 379, - 379, 0, 379, 379, 379, 379, 379, 379, 379, 379, - 379, 379, 379, 379, 379, 379, 379, 379, 379, 379, - - 379, 379, 379, 0, 379, 380, 380, 380, 0, 380, - 380, 380, 380, 380, 380, 380, 380, 380, 380, 380, - 380, 380, 380, 380, 380, 380, 380, 380, 380, 380, - 380, 380, 380, 380, 380, 380, 380, 380, 380, 380, - 380, 380, 380, 380, 380, 380, 380, 380, 381, 381, - 381, 0, 381, 381, 381, 381, 381, 381, 381, 381, - 381, 381, 381, 0, 381, 381, 381, 381, 0, 0, - 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 0, 381, 381, 381, 381, 381, - 381, 382, 0, 0, 0, 382, 0, 0, 0, 0, - - 382, 382, 382, 382, 382, 382, 382, 382, 382, 382, - 382, 382, 382, 382, 382, 382, 382, 0, 0, 0, - 0, 0, 382, 383, 0, 0, 0, 0, 383, 383, - 383, 383, 383, 383, 383, 383, 383, 383, 383, 383, - 383, 383, 383, 383, 383, 383, 383, 383, 383, 383, - 383, 383, 383, 383, 383, 383, 383, 383, 383, 383, - 383, 383, 383, 383, 383, 383, 384, 384, 384, 0, - 384, 384, 384, 384, 384, 384, 384, 384, 384, 384, - 384, 384, 384, 384, 384, 384, 384, 384, 384, 384, - 384, 384, 384, 384, 384, 384, 384, 384, 384, 384, - - 384, 384, 384, 384, 384, 384, 384, 384, 384, 385, - 385, 385, 0, 385, 385, 385, 385, 385, 385, 385, - 385, 385, 385, 385, 385, 385, 385, 385, 385, 385, - 385, 385, 385, 385, 385, 385, 385, 385, 385, 385, - 385, 385, 385, 385, 385, 385, 385, 385, 385, 385, - 385, 385, 386, 0, 0, 0, 0, 386, 386, 386, - 386, 386, 386, 386, 386, 386, 386, 386, 386, 386, - 386, 386, 386, 386, 387, 0, 0, 0, 0, 387, - 387, 387, 387, 387, 387, 387, 387, 387, 387, 387, - 387, 387, 387, 387, 387, 387, 388, 388, 388, 388, - - 388, 388, 388, 388, 388, 388, 388, 388, 388, 388, - 388, 388, 388, 388, 388, 388, 388, 388, 388, 388, - 388, 388, 388, 388, 388, 388, 388, 388, 388, 388, - 388, 388, 388, 388, 388, 388, 388, 388, 388, 389, - 389, 389, 389, 389, 389, 389, 389, 389, 389, 389, - 389, 389, 389, 389, 389, 389, 389, 389, 389, 389, - 389, 389, 389, 389, 389, 389, 389, 389, 389, 389, - 389, 389, 389, 389, 389, 389, 389, 389, 389, 389, - 389, 389, 390, 390, 390, 0, 390, 390, 390, 390, - 390, 390, 390, 390, 390, 390, 390, 390, 390, 390, - - 390, 390, 390, 390, 390, 390, 390, 390, 390, 390, - 390, 390, 390, 390, 390, 390, 390, 390, 390, 390, - 390, 390, 0, 390, 390, 391, 391, 391, 391, 391, - 391, 0, 0, 0, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 0, 0, 0, 391, 392, 392, - 392, 0, 392, 392, 392, 392, 392, 392, 392, 392, - 392, 392, 392, 392, 392, 392, 392, 392, 392, 392, - 392, 392, 392, 392, 392, 392, 392, 392, 392, 392, - 392, 392, 392, 392, 392, 392, 392, 392, 392, 392, - 392, 393, 393, 393, 393, 393, 393, 0, 0, 0, - - 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 393, 394, 394, 394, 394, 394, 394, - 394, 394, 394, 394, 394, 394, 394, 394, 394, 394, - 394, 394, 394, 394, 394, 394, 394, 394, 394, 394, - 394, 394, 394, 394, 394, 394, 394, 394, 394, 394, - 394, 394, 394, 394, 394, 394, 394, 395, 395, 395, - 395, 395, 395, 0, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 0, 0, 0, 0, 0, 395, - 396, 396, 396, 396, 396, 396, 396, 396, 396, 396, - 396, 396, 396, 396, 396, 396, 396, 396, 396, 396, - - 396, 396, 396, 396, 396, 396, 396, 396, 396, 396, - 396, 396, 396, 396, 396, 396, 396, 396, 396, 396, - 396, 396, 396, 397, 0, 0, 0, 397, 0, 0, - 0, 0, 397, 397, 397, 397, 397, 397, 397, 397, - 397, 397, 397, 397, 397, 397, 397, 397, 397, 0, - 0, 0, 0, 0, 397, 398, 0, 0, 0, 398, - 0, 0, 0, 0, 398, 398, 398, 398, 398, 398, - 398, 398, 398, 398, 398, 398, 398, 398, 398, 398, - 398, 0, 0, 0, 0, 0, 398, 399, 399, 399, - 399, 399, 399, 0, 0, 0, 0, 0, 0, 0, - - 0, 0, 0, 0, 0, 0, 0, 0, 0, 399, - 400, 400, 400, 400, 400, 400, 400, 400, 400, 400, - 400, 400, 400, 400, 400, 400, 400, 400, 400, 400, - 400, 400, 400, 400, 400, 400, 400, 400, 400, 400, - 400, 400, 400, 400, 400, 400, 400, 400, 400, 400, - 400, 400, 400, 401, 401, 401, 401, 401, 401, 0, - 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 0, 401, 402, 402, 402, 0, - 402, 402, 402, 402, 402, 402, 402, 402, 402, 402, - 402, 402, 402, 402, 402, 402, 402, 402, 402, 402, - - 402, 402, 402, 402, 402, 402, 402, 402, 402, 402, - 402, 402, 402, 402, 402, 402, 402, 402, 402, 403, - 403, 403, 403, 403, 403, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, - 0, 403, 340, 340, 340, 340, 340, 340, 340, 340, - 340, 340, 340, 340, 340, 340, 340, 340, 340, 340, - 340, 340, 340, 340, 340, 340, 340, 340, 340, 340, - 340, 340, 340, 340, 340, 340, 340, 340, 340, 340, - 340, 340, 340, 340, 340, 340 - } ; - -static yy_ste_type yy_last_accepting_state; -static YY_CHAR *yy_last_accepting_cpos; - -/* the intent behind this definition is that it'll catch - * any uses of REJECT which flex missed - */ -#define REJECT reject_used_but_not_detected -#define yymore() yymrused_but_not_detected -#define YY_MORE_ADJ 0 - -/* these variables are all declared out here so that section 3 code can - * manipulate them - */ -/* points to current character in buffer */ -static YY_CHAR *yy_c_buf_p = (YY_CHAR *) 0; -static int yy_init = 1; /* whether we need to initialize */ -static int yy_start = 0; /* start state number */ - -/* flag which is used to allow yywrap()'s to do buffer switches - * instead of setting up a fresh yyin. A bit of a hack ... - */ -static int yy_did_buffer_switch_on_eof; - -static yy_ste_type yy_get_previous_state YY_PROTO(( void )); -static yy_ste_type yy_try_NUL_trans YY_PROTO(( yy_ste_type current_state )); -static int yy_get_next_buffer YY_PROTO(( void )); -static void yyunput YY_PROTO(( YY_CHAR c, YY_CHAR *buf_ptr )); -void yyrestrt YY_PROTO(( FILE *input_file )); -void yyswtobf YY_PROTO(( YY_BUFFER_STATE new_buffer )); -void yyldbfst YY_PROTO(( void )); -YY_BUFFER_STATE yycrbffr YY_PROTO(( FILE *file, int size )); -void yydlbffr YY_PROTO(( YY_BUFFER_STATE b )); -void yyinbffr YY_PROTO(( YY_BUFFER_STATE b, FILE *file )); - -#define yy_new_buffer yycrbffr - -#ifdef __cplusplus -static int yyinput YY_PROTO(( void )); -#else -static int input YY_PROTO(( void )); -#endif - -YY_DECL - { - register yy_ste_type yy_current_state; - register YY_CHAR *yy_cp, *yy_bp; - register int yy_act; - - - static int bracelevel, didadef; - int i, indented_code, checking_used, new_xlation; - int doing_codeblock = false; - Char nmdef[MAXLINE], myesc(); - - - if ( yy_init ) - { - YY_USER_INIT; - - if ( ! yy_start ) - yy_start = 1; /* first start state */ - - if ( ! yyin ) - yyin = stdin; - - if ( ! yyout ) - yyout = stdout; - - if ( yy_current_buffer ) - yyinbffr( yy_current_buffer, yyin ); - else - yy_current_buffer = yycrbffr( yyin, YY_BUF_SIZE ); - - yyldbfst(); - - yy_init = 0; - } - - while ( 1 ) /* loops until end-of-file is reached */ - { - yy_cp = yy_c_buf_p; - - /* support of yytext */ - *yy_cp = yy_hold_char; - - /* yy_bp points to the position in yy_ch_buf of the start of the - * current run. - */ - yy_bp = yy_cp; - - yy_current_state = yy_start; - if ( yy_bp[-1] == '\n' ) - ++yy_current_state; -yy_match: - do - { - register YY_CHAR yy_c = yy_ec[*yy_cp]; - if ( yy_accept[yy_current_state] ) - { - yy_last_accepting_state = yy_current_state; - yy_last_accepting_cpos = yy_cp; - } - while(yy_chk[yy_base[yy_current_state] + yy_c] != yy_current_state) - { - yy_current_state = yy_def[yy_current_state]; - } - yy_current_state = yy_nxt[yy_base[yy_current_state] + yy_c]; - ++yy_cp; - } - while ( yy_current_state != 340 ); - yy_cp = yy_last_accepting_cpos; - yy_current_state = yy_last_accepting_state; - -yy_find_action: - yy_act = yy_accept[yy_current_state]; - - YY_DO_BEFORE_ACTION; - YY_USER_ACTION; - -do_action: /* this label is used only to access EOF actions */ - - - switch ( yy_act ) - { - case 0: /* must backtrack */ - /* undo the effects of YY_DO_BEFORE_ACTION */ - *yy_cp = yy_hold_char; - yy_cp = yy_last_accepting_cpos; - yy_current_state = yy_last_accepting_state; - goto yy_find_action; - -case 1: -# line 90 "" -indented_code = true; BEGIN(CODEBLOCK); - YY_BREAK -case 2: -# line 91 "" -++linenum; /* treat as a comment */ - YY_BREAK -case 3: -# line 92 "" -ECHO; BEGIN(C_COMMENT); - YY_BREAK -case 4: -# line 93 "" -return ( SCDECL ); - YY_BREAK -case 5: -# line 94 "" -return ( XSCDECL ); - YY_BREAK -case 6: -# line 95 "" -{ - ++linenum; - lndirout( stdout ); - indented_code = false; - BEGIN(CODEBLOCK); - } - YY_BREAK -case 7: -# line 102 "" -return ( WHITESPACE ); - YY_BREAK -case 8: -# line 104 "" -{ - sectnum = 2; - lndirout( stdout ); - BEGIN(SECT2PROLOG); - return ( SECTEND ); - } - YY_BREAK -case 9: -# line 111 "" -{ - pptmsg( "warning - %%used/%%unused have been deprecated" ); - checking_used = REALLY_USED; BEGIN(USED_LIST); - } - YY_BREAK -case 10: -# line 115 "" -{ - checking_used = REALLY_NOT_USED; BEGIN(USED_LIST); - pptmsg( "warning - %%used/%%unused have been deprecated" ); - checking_used = REALLY_NOT_USED; BEGIN(USED_LIST); - } - YY_BREAK -case 11: -# line 122 "" -{ -#ifdef NOTDEF - fprintf( stderr, - "old-style lex command at line %d ignored:\n\t%s", - linenum, yytext ); -#endif - ++linenum; - } - YY_BREAK -case 12: -# line 131 "" -/* ignore old lex directive */ - YY_BREAK -case 13: -# line 133 "" -{ - ++linenum; - xlation = - (int *) malloc( sizeof( int ) * (unsigned) csize ); - - if ( ! xlation ) - flxfatal( - "dynamic memory failure building %t table" ); - - for ( i = 0; i < csize; ++i ) - xlation[i] = 0; - - nuxlatns = 0; - - BEGIN(XLATION); - } - YY_BREAK -case 14: -# line 150 "" -synerr( "unrecognized '%' directive" ); - YY_BREAK -case 15: -# line 152 "" -{ - (void) strcpy( nmstr, (char *) yytext ); - didadef = false; - BEGIN(PICKUPDEF); - } - YY_BREAK -case 16: -# line 158 "" -RETURNNAME; - YY_BREAK -case 17: -# line 159 "" -++linenum; /* allows blank lines in section 1 */ - YY_BREAK -case 18: -# line 160 "" -++linenum; return ( '\n' ); - YY_BREAK -case 19: -# line 161 "" -synerr( "illegal character" ); BEGIN(RECOVER); - YY_BREAK -case 20: -# line 164 "" -ECHO; BEGIN(INITIAL); - YY_BREAK -case 21: -# line 165 "" -++linenum; ECHO; BEGIN(INITIAL); - YY_BREAK -case 22: -# line 166 "" -ECHO; - YY_BREAK -case 23: -# line 167 "" -ECHO; - YY_BREAK -case 24: -# line 168 "" -++linenum; ECHO; - YY_BREAK -case 25: -# line 171 "" -++linenum; BEGIN(INITIAL); - YY_BREAK -case 26: -# line 172 "" -ECHO; CHECK_REJECT(yytext); - YY_BREAK -case 27: -# line 173 "" -ECHO; CHECK_YYMORE(yytext); - YY_BREAK -case 28: -# line 174 "" -ECHO; - YY_BREAK -case 29: -# line 175 "" -{ - ++linenum; - ECHO; - if ( indented_code ) - BEGIN(INITIAL); - } - YY_BREAK -case 30: -# line 183 "" -/* separates name and definition */ - YY_BREAK -case 31: -# line 185 "" -{ - (void) strcpy( (char *) nmdef, (char *) yytext ); - - for ( i = strlen( (char *) nmdef ) - 1; - i >= 0 && - nmdef[i] == ' ' || nmdef[i] == '\t'; - --i ) - ; - - nmdef[i + 1] = '\0'; - - ndinstal( nmstr, nmdef ); - didadef = true; - } - YY_BREAK -case 32: -# line 200 "" -{ - if ( ! didadef ) - synerr( "incomplete name definition" ); - BEGIN(INITIAL); - ++linenum; - } - YY_BREAK -case 33: -# line 207 "" -++linenum; BEGIN(INITIAL); RETURNNAME; - YY_BREAK -case 34: -# line 210 "" -++linenum; BEGIN(INITIAL); - YY_BREAK -case 35: -# line 211 "" - - YY_BREAK -case 36: -# line 212 "" -{ - if ( allupper( yytext ) ) - rjctused = checking_used; - else - synerr( "unrecognized %used/%unused construct" ); - } - YY_BREAK -case 37: -# line 218 "" -{ - if ( alllower( yytext ) ) - yymrreus = checking_used; - else - synerr( "unrecognized %used/%unused construct" ); - } - YY_BREAK -case 38: -# line 224 "" -synerr( "unrecognized %used/%unused construct" ); - YY_BREAK -case 39: -# line 227 "" -++linenum; BEGIN(INITIAL); - YY_BREAK -case 40: -# line 228 "" -++nuxlatns; new_xlation = true; - YY_BREAK -case 41: -# line 229 "" -synerr( "bad row in translation table" ); - YY_BREAK -case 42: -# line 230 "" -/* ignore whitespace */ - YY_BREAK -case 43: -# line 232 "" -{ - xlation[myesc( yytext )] = - (new_xlation ? nuxlatns : -nuxlatns); - new_xlation = false; - } - YY_BREAK -case 44: -# line 237 "" -{ - xlation[yytext[0]] = - (new_xlation ? nuxlatns : -nuxlatns); - new_xlation = false; - } - YY_BREAK -case 45: -# line 243 "" -++linenum; - YY_BREAK -case 46: -*yy_cp = yy_hold_char; /* undo effects of setting up yytext */ -yy_c_buf_p = yy_cp -= 1; -YY_DO_BEFORE_ACTION; /* set up yytext again */ -# line 246 "" -{ - ++linenum; - ACTION_ECHO; - MARK_END_OF_PROLOG; - BEGIN(SECT2); - } - YY_BREAK -case 47: -# line 253 "" -++linenum; ACTION_ECHO; - YY_BREAK -case YY_STATE_EOF(SECT2PROLOG): -# line 255 "" -MARK_END_OF_PROLOG; yyterminate(); - YY_BREAK -case 49: -# line 257 "" -++linenum; /* allow blank lines in section 2 */ - YY_BREAK -case 50: -# line 259 "" -{ - indented_code = (yytext[0] != '%'); - doing_codeblock = true; - bracelevel = 1; - - if ( indented_code ) - ACTION_ECHO; - - BEGIN(CODEBLOCK_2); - } - YY_BREAK -case 51: -# line 270 "" -BEGIN(SC); return ( '<' ); - YY_BREAK -case 52: -# line 271 "" -return ( '^' ); - YY_BREAK -case 53: -# line 272 "" -BEGIN(QUOTE); return ( '"' ); - YY_BREAK -case 54: -*yy_cp = yy_hold_char; /* undo effects of setting up yytext */ -yy_c_buf_p = yy_cp = yy_bp + 1; -YY_DO_BEFORE_ACTION; /* set up yytext again */ -# line 273 "" -BEGIN(NUM); return ( '{' ); - YY_BREAK -case 55: -# line 274 "" -BEGIN(BRACEERROR); - YY_BREAK -case 56: -*yy_cp = yy_hold_char; /* undo effects of setting up yytext */ -yy_c_buf_p = yy_cp = yy_bp + 1; -YY_DO_BEFORE_ACTION; /* set up yytext again */ -# line 275 "" -return ( '$' ); - YY_BREAK -case 57: -# line 277 "" -{ - bracelevel = 1; - BEGIN(PERCENT_BRACE_ACTION); - return ( '\n' ); - } - YY_BREAK -case 58: -# line 282 "" -cntdactn = true; ++linenum; return ( '\n' ); - YY_BREAK -case 59: -# line 284 "" -{ - /* this rule is separate from the one below because - * otherwise we get variable trailing context, so - * we can't build the scanner using -{f,F} - */ - bracelevel = 0; - cntdactn = false; - BEGIN(ACTION); - return ( '\n' ); - } - YY_BREAK -case 60: -*yy_cp = yy_hold_char; /* undo effects of setting up yytext */ -yy_c_buf_p = yy_cp -= 1; -YY_DO_BEFORE_ACTION; /* set up yytext again */ -# line 295 "" -{ - bracelevel = 0; - cntdactn = false; - BEGIN(ACTION); - return ( '\n' ); - } - YY_BREAK -case 61: -# line 302 "" -++linenum; return ( '\n' ); - YY_BREAK -case 62: -# line 304 "" -return ( EOF_OP ); - YY_BREAK -case 63: -# line 306 "" -{ - sectnum = 3; - BEGIN(SECT3); - return ( EOF ); /* to stop the parser */ - } - YY_BREAK -case 64: -# line 312 "" -{ - int cclval; - - (void) strcpy( nmstr, (char *) yytext ); - - /* check to see if we've already encountered this ccl */ - if ( (cclval = ccllookp( (Char *) nmstr )) ) - { - yylval = cclval; - ++cclreuse; - return ( PREVCCL ); - } - else - { - /* we fudge a bit. We know that this ccl will - * soon be numbered as lastccl + 1 by cclinit - */ - cclnstal( (Char *) nmstr, lastccl + 1 ); - - /* push back everything but the leading bracket - * so the ccl can be rescanned - */ - PUT_BACK_STRING((Char *) nmstr, 1); - - BEGIN(FIRSTCCL); - return ( '[' ); - } - } - YY_BREAK -case 65: -# line 341 "" -{ - register Char *nmdefptr; - Char *ndlookup(); - - (void) strcpy( nmstr, (char *) yytext ); - nmstr[yyleng - 1] = '\0'; /* chop trailing brace */ - - /* lookup from "nmstr + 1" to chop leading brace */ - if ( ! (nmdefptr = ndlookup( nmstr + 1 )) ) - synerr( "undefined {name}" ); - - else - { /* push back name surrounded by ()'s */ - unput(')'); - PUT_BACK_STRING(nmdefptr, 0); - unput('('); - } - } - YY_BREAK -case 66: -# line 360 "" -return ( yytext[0] ); - YY_BREAK -case 67: -# line 361 "" -RETURNCHAR; - YY_BREAK -case 68: -# line 362 "" -++linenum; return ( '\n' ); - YY_BREAK -case 69: -# line 365 "" -return ( ',' ); - YY_BREAK -case 70: -# line 366 "" -BEGIN(SECT2); return ( '>' ); - YY_BREAK -case 71: -*yy_cp = yy_hold_char; /* undo effects of setting up yytext */ -yy_c_buf_p = yy_cp = yy_bp + 1; -YY_DO_BEFORE_ACTION; /* set up yytext again */ -# line 367 "" -BEGIN(CARETISBOL); return ( '>' ); - YY_BREAK -case 72: -# line 368 "" -RETURNNAME; - YY_BREAK -case 73: -# line 369 "" -synerr( "bad start condition name" ); - YY_BREAK -case 74: -# line 371 "" -BEGIN(SECT2); return ( '^' ); - YY_BREAK -case 75: -# line 374 "" -RETURNCHAR; - YY_BREAK -case 76: -# line 375 "" -BEGIN(SECT2); return ( '"' ); - YY_BREAK -case 77: -# line 377 "" -{ - synerr( "missing quote" ); - BEGIN(SECT2); - ++linenum; - return ( '"' ); - } - YY_BREAK -case 78: -*yy_cp = yy_hold_char; /* undo effects of setting up yytext */ -yy_c_buf_p = yy_cp = yy_bp + 1; -YY_DO_BEFORE_ACTION; /* set up yytext again */ -# line 385 "" -BEGIN(CCL); return ( '^' ); - YY_BREAK -case 79: -*yy_cp = yy_hold_char; /* undo effects of setting up yytext */ -yy_c_buf_p = yy_cp = yy_bp + 1; -YY_DO_BEFORE_ACTION; /* set up yytext again */ -# line 386 "" -return ( '^' ); - YY_BREAK -case 80: -# line 387 "" -BEGIN(CCL); yylval = '-'; return ( CHAR ); - YY_BREAK -case 81: -# line 388 "" -BEGIN(CCL); RETURNCHAR; - YY_BREAK -case 82: -*yy_cp = yy_hold_char; /* undo effects of setting up yytext */ -yy_c_buf_p = yy_cp = yy_bp + 1; -YY_DO_BEFORE_ACTION; /* set up yytext again */ -# line 390 "" -return ( '-' ); - YY_BREAK -case 83: -# line 391 "" -RETURNCHAR; - YY_BREAK -case 84: -# line 392 "" -BEGIN(SECT2); return ( ']' ); - YY_BREAK -case 85: -# line 395 "" -{ - yylval = myctoi( yytext ); - return ( NUMBER ); - } - YY_BREAK -case 86: -# line 400 "" -return ( ',' ); - YY_BREAK -case 87: -# line 401 "" -BEGIN(SECT2); return ( '}' ); - YY_BREAK -case 88: -# line 403 "" -{ - synerr( "bad character inside {}'s" ); - BEGIN(SECT2); - return ( '}' ); - } - YY_BREAK -case 89: -# line 409 "" -{ - synerr( "missing }" ); - BEGIN(SECT2); - ++linenum; - return ( '}' ); - } - YY_BREAK -case 90: -# line 417 "" -synerr( "bad name in {}'s" ); BEGIN(SECT2); - YY_BREAK -case 91: -# line 418 "" -synerr( "missing }" ); ++linenum; BEGIN(SECT2); - YY_BREAK -case 92: -# line 421 "" -bracelevel = 0; - YY_BREAK -case 93: -# line 422 "" -{ - ACTION_ECHO; - CHECK_REJECT(yytext); - } - YY_BREAK -case 94: -# line 426 "" -{ - ACTION_ECHO; - CHECK_YYMORE(yytext); - } - YY_BREAK -case 95: -# line 430 "" -ACTION_ECHO; - YY_BREAK -case 96: -# line 431 "" -{ - ++linenum; - ACTION_ECHO; - if ( bracelevel == 0 || - (doing_codeblock && indented_code) ) - { - if ( ! doing_codeblock ) - fputs( "\tYY_BREAK\n", tmpactfl ); - - doing_codeblock = false; - BEGIN(SECT2); - } - } - YY_BREAK - /* Reject and YYmore() are checked for above, in PERCENT_BRACE_ACTION */ -case 97: -# line 447 "" -ACTION_ECHO; ++bracelevel; - YY_BREAK -case 98: -# line 448 "" -ACTION_ECHO; --bracelevel; - YY_BREAK -case 99: -# line 449 "" -ACTION_ECHO; - YY_BREAK -case 100: -# line 450 "" -ACTION_ECHO; - YY_BREAK -case 101: -# line 451 "" -ACTION_ECHO; BEGIN(ACTION_COMMENT); - YY_BREAK -case 102: -# line 452 "" -ACTION_ECHO; /* character constant */ - YY_BREAK -case 103: -# line 453 "" -ACTION_ECHO; BEGIN(ACTION_STRING); - YY_BREAK -case 104: -# line 454 "" -{ - ++linenum; - ACTION_ECHO; - if ( bracelevel == 0 ) - { - fputs( "\tYY_BREAK\n", tmpactfl ); - BEGIN(SECT2); - } - } - YY_BREAK -case 105: -# line 463 "" -ACTION_ECHO; - YY_BREAK -case 106: -# line 465 "" -ACTION_ECHO; BEGIN(ACTION); - YY_BREAK -case 107: -# line 466 "" -ACTION_ECHO; - YY_BREAK -case 108: -# line 467 "" -ACTION_ECHO; - YY_BREAK -case 109: -# line 468 "" -++linenum; ACTION_ECHO; - YY_BREAK -case 110: -# line 469 "" -ACTION_ECHO; - YY_BREAK -case 111: -# line 471 "" -ACTION_ECHO; - YY_BREAK -case 112: -# line 472 "" -ACTION_ECHO; - YY_BREAK -case 113: -# line 473 "" -++linenum; ACTION_ECHO; - YY_BREAK -case 114: -# line 474 "" -ACTION_ECHO; BEGIN(ACTION); - YY_BREAK -case 115: -# line 475 "" -ACTION_ECHO; - YY_BREAK -case YY_STATE_EOF(ACTION): -case YY_STATE_EOF(ACTION_COMMENT): -case YY_STATE_EOF(ACTION_STRING): -# line 477 "" -{ - synerr( "EOF encountered inside an action" ); - yyterminate(); - } - YY_BREAK -case 117: -# line 483 "" -{ - yylval = myesc( yytext ); - return ( CHAR ); - } - YY_BREAK -case 118: -# line 488 "" -{ - yylval = myesc( yytext ); - BEGIN(CCL); - return ( CHAR ); - } - YY_BREAK -case 119: -# line 495 "" -ECHO; - YY_BREAK -case 120: -# line 496 "" -YY_FATAL_ERROR( "flex scanner jammed" ); - YY_BREAK -case YY_STATE_EOF(INITIAL): -case YY_STATE_EOF(SECT2): -case YY_STATE_EOF(SECT3): -case YY_STATE_EOF(CODEBLOCK): -case YY_STATE_EOF(PICKUPDEF): -case YY_STATE_EOF(SC): -case YY_STATE_EOF(CARETISBOL): -case YY_STATE_EOF(NUM): -case YY_STATE_EOF(QUOTE): -case YY_STATE_EOF(FIRSTCCL): -case YY_STATE_EOF(CCL): -case YY_STATE_EOF(RECOVER): -case YY_STATE_EOF(BRACEERROR): -case YY_STATE_EOF(C_COMMENT): -case YY_STATE_EOF(PERCENT_BRACE_ACTION): -case YY_STATE_EOF(USED_LIST): -case YY_STATE_EOF(CODEBLOCK_2): -case YY_STATE_EOF(XLATION): - yyterminate(); - - case YY_END_OF_BUFFER: - { - /* amount of text matched not including the EOB char */ - int yy_amount_of_matched_text = yy_cp - yytext - 1; - - /* undo the effects of YY_DO_BEFORE_ACTION */ - *yy_cp = yy_hold_char; - - /* note that here we test for yy_c_buf_p "<=" to the position - * of the first EOB in the buffer, since yy_c_buf_p will - * already have been incremented past the NUL character - * (since all states make transitions on EOB to the end- - * of-buffer state). Contrast this with the test in yyinput(). - */ - if ( yy_c_buf_p <= &yy_current_buffer->yy_ch_buf[yy_n_chars] ) - /* this was really a NUL */ - { - yy_ste_type yy_next_state; - - yy_c_buf_p = yytext + yy_amount_of_matched_text; - - yy_current_state = yy_get_previous_state(); - - /* okay, we're now positioned to make the - * NUL transition. We couldn't have - * yy_get_previous_state() go ahead and do it - * for us because it doesn't know how to deal - * with the possibility of jamming (and we - * don't want to build jamming into it because - * then it will run more slowly) - */ - - yy_next_state = yy_try_NUL_trans( yy_current_state ); - - yy_bp = yytext + YY_MORE_ADJ; - - if ( yy_next_state ) - { - /* consume the NUL */ - yy_cp = ++yy_c_buf_p; - yy_current_state = yy_next_state; - goto yy_match; - } - - else - { - yy_cp = yy_last_accepting_cpos; - yy_current_state = yy_last_accepting_state; - goto yy_find_action; - } - } - - else switch ( yy_get_next_buffer() ) - { - case EOB_ACT_END_OF_FILE: - { - yy_did_buffer_switch_on_eof = 0; - - if ( yywrap() ) - { - /* note: because we've taken care in - * yy_get_next_buffer() to have set up yytext, - * we can now set up yy_c_buf_p so that if some - * total hoser (like flex itself) wants - * to call the scanner after we return the - * YY_NULL, it'll still work - another YY_NULL - * will get returned. - */ - yy_c_buf_p = yytext + YY_MORE_ADJ; - - yy_act = YY_STATE_EOF((yy_start - 1) / 2); - goto do_action; - } - - else - { - if ( ! yy_did_buffer_switch_on_eof ) - YY_NEW_FILE; - } - } - break; - - case EOB_ACT_CONTINUE_SCAN: - yy_c_buf_p = yytext + yy_amount_of_matched_text; - - yy_current_state = yy_get_previous_state(); - - yy_cp = yy_c_buf_p; - yy_bp = yytext + YY_MORE_ADJ; - goto yy_match; - - case EOB_ACT_LAST_MATCH: - yy_c_buf_p = - &yy_current_buffer->yy_ch_buf[yy_n_chars]; - - yy_current_state = yy_get_previous_state(); - - yy_cp = yy_c_buf_p; - yy_bp = yytext + YY_MORE_ADJ; - goto yy_find_action; - } - break; - } - - default: -#ifdef FLEX_DEBUG - printf( "action # %d\n", yy_act ); -#endif - YY_FATAL_ERROR( - "fatal flex scanner internal error--no action found" ); - } - } - } - - -/* yy_get_next_buffer - try to read in a new buffer - * - * synopsis - * int yy_get_next_buffer(); - * - * returns a code representing an action - * EOB_ACT_LAST_MATCH - - * EOB_ACT_CONTINUE_SCAN - continue scanning from current position - * EOB_ACT_END_OF_FILE - end of file - */ - -static int yy_get_next_buffer() - - { - register YY_CHAR *dest = yy_current_buffer->yy_ch_buf; - register YY_CHAR *source = yytext - 1; /* copy prev. char, too */ - register int number_to_move, i; - int ret_val; - - if ( yy_c_buf_p > &yy_current_buffer->yy_ch_buf[yy_n_chars + 1] ) - YY_FATAL_ERROR( - "fatal flex scanner internal error--end of buffer missed" ); - - /* try to read more data */ - - /* first move last chars to start of buffer */ - number_to_move = yy_c_buf_p - yytext; - - for ( i = 0; i < number_to_move; ++i ) - *(dest++) = *(source++); - - if ( yy_current_buffer->yy_eof_status != EOF_NOT_SEEN ) - /* don't do the read, it's not guaranteed to return an EOF, - * just force an EOF - */ - yy_n_chars = 0; - - else - { - int num_to_read = yy_current_buffer->yy_buf_size - number_to_move - 1; - - if ( num_to_read > YY_READ_BUF_SIZE ) - num_to_read = YY_READ_BUF_SIZE; - - else if ( num_to_read <= 0 ) - YY_FATAL_ERROR( "fatal error - scanner input buffer overflow" ); - - /* read in more data */ - YY_INPUT( (&yy_current_buffer->yy_ch_buf[number_to_move]), - yy_n_chars, num_to_read ); - } - - if ( yy_n_chars == 0 ) - { - if ( number_to_move == 1 ) - { - ret_val = EOB_ACT_END_OF_FILE; - yy_current_buffer->yy_eof_status = EOF_DONE; - } - - else - { - ret_val = EOB_ACT_LAST_MATCH; - yy_current_buffer->yy_eof_status = EOF_PENDING; - } - } - - else - ret_val = EOB_ACT_CONTINUE_SCAN; - - yy_n_chars += number_to_move; - yy_current_buffer->yy_ch_buf[yy_n_chars] = YY_END_OF_BUFFER_CHAR; - yy_current_buffer->yy_ch_buf[yy_n_chars + 1] = YY_END_OF_BUFFER_CHAR; - - /* yytext begins at the second character in yy_ch_buf; the first - * character is the one which preceded it before reading in the latest - * buffer; it needs to be kept around in case it's a newline, so - * yy_get_previous_state() will have with '^' rules active - */ - - yytext = &yy_current_buffer->yy_ch_buf[1]; - - return ( ret_val ); - } - - -/* yy_get_previous_state - get the state just before the EOB char was reached - * - * synopsis - * yy_ste_type yy_get_previous_state(); - */ - -static yy_ste_type yy_get_previous_state() - - { - register yy_ste_type yy_current_state; - register YY_CHAR *yy_cp; - - register YY_CHAR *yy_bp = yytext; - - yy_current_state = yy_start; - if ( yy_bp[-1] == '\n' ) - ++yy_current_state; - - for ( yy_cp = yytext + YY_MORE_ADJ; yy_cp < yy_c_buf_p; ++yy_cp ) - { - register YY_CHAR yy_c = (*yy_cp ? yy_ec[*yy_cp] : 1); - if ( yy_accept[yy_current_state] ) - { - yy_last_accepting_state = yy_current_state; - yy_last_accepting_cpos = yy_cp; - } - while ( yy_chk[yy_base[yy_current_state] + yy_c] != yy_current_state ) - { - yy_current_state = yy_def[yy_current_state]; - } - yy_current_state = yy_nxt[yy_base[yy_current_state] + yy_c]; - } - - return ( yy_current_state ); - } - - -/* yy_try_NUL_trans - try to make a transition on the NUL character - * - * synopsis - * next_state = yy_try_NUL_trans( current_state ); - */ - -#ifdef YY_USE_PROTOS -static yy_ste_type yy_try_NUL_trans( register yy_ste_type yy_current_state ) -#else -static yy_ste_type yy_try_NUL_trans( yy_current_state ) -register yy_ste_type yy_current_state; -#endif - - { - register int yy_is_jam; - register YY_CHAR *yy_cp = yy_c_buf_p; - - register YY_CHAR yy_c = 1; - if ( yy_accept[yy_current_state] ) - { - yy_last_accepting_state = yy_current_state; - yy_last_accepting_cpos = yy_cp; - } - while ( yy_chk[yy_base[yy_current_state] + yy_c] != yy_current_state ) - { - yy_current_state = yy_def[yy_current_state]; - } - yy_current_state = yy_nxt[yy_base[yy_current_state] + yy_c]; - yy_is_jam = (yy_current_state == 340); - - return ( yy_is_jam ? 0 : yy_current_state ); - } - - -#ifdef YY_USE_PROTOS -static void yyunput( YY_CHAR c, register YY_CHAR *yy_bp ) -#else -static void yyunput( c, yy_bp ) -YY_CHAR c; -register YY_CHAR *yy_bp; -#endif - - { - register YY_CHAR *yy_cp = yy_c_buf_p; - - /* undo effects of setting up yytext */ - *yy_cp = yy_hold_char; - - if ( yy_cp < yy_current_buffer->yy_ch_buf + 2 ) - { /* need to shift things up to make room */ - register int number_to_move = yy_n_chars + 2; /* +2 for EOB chars */ - register YY_CHAR *dest = - &yy_current_buffer->yy_ch_buf[yy_current_buffer->yy_buf_size + 2]; - register YY_CHAR *source = - &yy_current_buffer->yy_ch_buf[number_to_move]; - - while ( source > yy_current_buffer->yy_ch_buf ) - *--dest = *--source; - - yy_cp += dest - source; - yy_bp += dest - source; - yy_n_chars = yy_current_buffer->yy_buf_size; - - if ( yy_cp < yy_current_buffer->yy_ch_buf + 2 ) - YY_FATAL_ERROR( "flex scanner push-back overflow" ); - } - - if ( yy_cp > yy_bp && yy_cp[-1] == '\n' ) - yy_cp[-2] = '\n'; - - *--yy_cp = c; - - /* note: the formal parameter *must* be called "yy_bp" for this - * macro to now work correctly - */ - YY_DO_BEFORE_ACTION; /* set up yytext again */ - } - - -#ifdef __cplusplus -static int yyinput() -#else -static int input() -#endif - - { - int c; - YY_CHAR *yy_cp = yy_c_buf_p; - - *yy_cp = yy_hold_char; - - if ( *yy_c_buf_p == YY_END_OF_BUFFER_CHAR ) - { - /* yy_c_buf_p now points to the character we want to return. - * If this occurs *before* the EOB characters, then it's a - * valid NUL; if not, then we've hit the end of the buffer. - */ - if ( yy_c_buf_p < &yy_current_buffer->yy_ch_buf[yy_n_chars] ) - /* this was really a NUL */ - *yy_c_buf_p = '\0'; - - else - { /* need more input */ - yytext = yy_c_buf_p; - ++yy_c_buf_p; - - switch ( yy_get_next_buffer() ) - { - case EOB_ACT_END_OF_FILE: - { - if ( yywrap() ) - { - yy_c_buf_p = yytext + YY_MORE_ADJ; - return ( EOF ); - } - - YY_NEW_FILE; - -#ifdef __cplusplus - return ( yyinput() ); -#else - return ( input() ); -#endif - } - break; - - case EOB_ACT_CONTINUE_SCAN: - yy_c_buf_p = yytext + YY_MORE_ADJ; - break; - - case EOB_ACT_LAST_MATCH: -#ifdef __cplusplus - YY_FATAL_ERROR( "unexpected last match in yyinput()" ); -#else - YY_FATAL_ERROR( "unexpected last match in input()" ); -#endif - } - } - } - - c = *yy_c_buf_p; - yy_hold_char = *++yy_c_buf_p; - - return ( c ); - } - - -#ifdef YY_USE_PROTOS -void yyrestrt( FILE *input_file ) -#else -void yyrestrt( input_file ) -FILE *input_file; -#endif - - { - yyinbffr( yy_current_buffer, input_file ); - yyldbfst(); - } - - -#ifdef YY_USE_PROTOS -void yyswtobf( YY_BUFFER_STATE new_buffer ) -#else -void yyswtobf( new_buffer ) -YY_BUFFER_STATE new_buffer; -#endif - - { - if ( yy_current_buffer == new_buffer ) - return; - - if ( yy_current_buffer ) - { - /* flush out information for old buffer */ - *yy_c_buf_p = yy_hold_char; - yy_current_buffer->yy_buf_pos = yy_c_buf_p; - yy_current_buffer->yy_n_chars = yy_n_chars; - } - - yy_current_buffer = new_buffer; - yyldbfst(); - - /* we don't actually know whether we did this switch during - * EOF (yywrap()) processing, but the only time this flag - * is looked at is after yywrap() is called, so it's safe - * to go ahead and always set it. - */ - yy_did_buffer_switch_on_eof = 1; - } - - -#ifdef YY_USE_PROTOS -void yyldbfst( void ) -#else -void yyldbfst() -#endif - - { - yy_n_chars = yy_current_buffer->yy_n_chars; - yytext = yy_c_buf_p = yy_current_buffer->yy_buf_pos; - yyin = yy_current_buffer->yy_input_file; - yy_hold_char = *yy_c_buf_p; - } - - -#ifdef YY_USE_PROTOS -YY_BUFFER_STATE yycrbffr( FILE *file, int size ) -#else -YY_BUFFER_STATE yycrbffr( file, size ) -FILE *file; -int size; -#endif - - { - YY_BUFFER_STATE b; - - b = (YY_BUFFER_STATE) malloc( sizeof( struct yy_buffer_state ) ); - - if ( ! b ) - YY_FATAL_ERROR( "out of dynamic memory in yycrbffr()" ); - - b->yy_buf_size = size; - - /* yy_ch_buf has to be 2 characters longer than the size given because - * we need to put in 2 end-of-buffer characters. - */ - b->yy_ch_buf = (YY_CHAR *) malloc( (unsigned) (b->yy_buf_size + 2) ); - - if ( ! b->yy_ch_buf ) - YY_FATAL_ERROR( "out of dynamic memory in yycrbffr()" ); - - yyinbffr( b, file ); - - return ( b ); - } - - -#ifdef YY_USE_PROTOS -void yydlbffr( YY_BUFFER_STATE b ) -#else -void yydlbffr( b ) -YY_BUFFER_STATE b; -#endif - - { - if ( b == yy_current_buffer ) - yy_current_buffer = (YY_BUFFER_STATE) 0; - - free( (char *) b->yy_ch_buf ); - free( (char *) b ); - } - - -#ifdef YY_USE_PROTOS -void yyinbffr( YY_BUFFER_STATE b, FILE *file ) -#else -void yyinbffr( b, file ) -YY_BUFFER_STATE b; -FILE *file; -#endif - - { - b->yy_input_file = file; - - /* we put in the '\n' and start reading from [1] so that an - * initial match-at-newline will be true. - */ - - b->yy_ch_buf[0] = '\n'; - b->yy_n_chars = 1; - - /* we always need two end-of-buffer characters. The first causes - * a transition to the end-of-buffer state. The second causes - * a jam in that state. - */ - b->yy_ch_buf[1] = YY_END_OF_BUFFER_CHAR; - b->yy_ch_buf[2] = YY_END_OF_BUFFER_CHAR; - - b->yy_buf_pos = &b->yy_ch_buf[1]; - - b->yy_eof_status = EOF_NOT_SEEN; - } -# line 496 "" - - - -int yywrap() - - { - if ( --ninfiles > 0 ) - { - stinpfle( *++inp_fles ); - return ( 0 ); - } - - else - return ( 1 ); - } - - -/* stinpfle - open the given file (if NULL, stdin) for scanning */ - -void stinpfle( file ) -char *file; - - { - if ( file ) - { - infilnam = file; - yyin = fopen( infilnam, "r" ); - - if ( yyin == NULL ) - lerrsf( "can't open %s", file ); - } - - else - { - yyin = stdin; - infilnam = ""; - } - } diff --git a/commands/flex-2.5.4/MISC/MVS/unfixit.l b/commands/flex-2.5.4/MISC/MVS/unfixit.l deleted file mode 100644 index 3f8dddc68..000000000 --- a/commands/flex-2.5.4/MISC/MVS/unfixit.l +++ /dev/null @@ -1,141 +0,0 @@ -%{ -/* unfixit.l - convert shortened external names to names back to their - * original names. (See fixit.l) - */ - -/* - * This program is included to satisfy "dumb" compilers/linkers which - * do not know about externals of names longer than 8 bytes. - * - * Steven W. Layten - * Chemical Abstracts Service - * PO BOX 3012 - * Columbus, OH 43210 - */ -%} -%% -"actfilnm" printf("action_file_name"); -"actnout" printf("action_out"); -"addacpt" printf("add_accept"); -"alllower" printf("all_lower"); -"allupper" printf("all_upper"); -"allocarr" printf("allocate_array"); -"asscrule" printf("assoc_rule"); -"bktrkfil" printf("backtrack_file"); -"bktrkrep" printf("backtrack_report"); -"bol_nded" printf("bol_needed"); -"bldeofac" printf("build_eof_action"); -"cclnstal" printf("cclinstal"); -"ccllookp" printf("ccllookup"); -"cclnegat" printf("cclnegate"); -"cclsrted" printf("cclsorted"); -"ck4bktrk" printf("check_for_backtracking"); -"cktrlcnt" printf("check_trailing_context"); -"cntdactn" printf("continued_action"); -"copystrn" printf("copy_string"); -"cpunsstr" printf("copy_unsigned_string"); -"cpyrght" printf("copyright"); -"copysngl" printf("copysingl"); -"c_mx_ccl" printf("current_max_ccl_tbl_size"); -"c_mx_dfa" printf("current_max_dfa_size"); -"c_mxdfas" printf("current_max_dfas"); -"curmxrls" printf("current_max_rules"); -"c_mx_scs" printf("current_max_scs"); -"c_mx_tmp" printf("current_max_template_xpairs"); -"c_mx_xpr" printf("current_max_xpairs"); -"c_mxccls" printf("current_maxccls"); -"curr_mns" printf("current_mns"); -"cursttyp" printf("current_state_type"); -"datflush" printf("dataflush"); -"dfacunin" printf("dfaacc_union"); -"do_indnt" printf("do_indent"); -"dmpasrl" printf("dump_associated_rules"); -"dmptrns" printf("dump_transitions"); -"dupmach" printf("dupmachine"); -"ecsfrmxt" printf("ecs_from_xlation"); -"eobstate" printf("end_of_buffer_state"); -"epsclos" printf("epsclosure"); -"expnxtck" printf("expand_nxt_chk"); -"fndtblsp" printf("find_table_space"); -"fnshrule" printf("finish_rule"); -"firstfre" printf("firstfree"); -"firstprt" printf("firstprot"); -"flxgettm" printf("flex_gettime"); -"flxerror" printf("flexerror"); -"flxfatal" printf("flexfatal"); -"fmtptmsg" printf("format_pinpoint_message"); -"gnNULtrn" printf("gen_NUL_trans"); -"gnbktrkg" printf("gen_backtracking"); -"gnbtactn" printf("gen_bt_action"); -"gnfndact" printf("gen_find_action"); -"gnlindir" printf("gen_line_dirs"); -"gnnxcste" printf("gen_next_compressed_state"); -"gnnxmtch" printf("gen_next_match"); -"gnnxtst" printf("gen_next_state"); -"gnstrtst" printf("gen_start_state"); -"hshentry" printf("hash_entry"); -"hshfct" printf("hashfunct"); -"incmxdfa" printf("increase_max_dfas"); -"indput2s" printf("indent_put2s"); -"indputs" printf("indent_puts"); -"infilnam" printf("infilename"); -"inp_fles" printf("input_files"); -"intractv" printf("interactive"); -"lndirout" printf("line_directive_out"); -"lnkmchns" printf("link_machines"); -"lst_cset" printf("list_character_set"); -"maketbls" printf("make_tables"); -"mkbgnorm" printf("mark_beginning_as_normal"); -"mktmplat" printf("mktemplate"); -"nbktrckg" printf("num_backtracking"); -"ninfiles" printf("num_input_files"); -"numraloc" printf("num_reallocs"); -"numrules" printf("num_rules"); -"nuxlatns" printf("num_xlations"); -"numnpair" printf("numsnpairs"); -"outfilnm" printf("output_file_name"); -"peakpair" printf("peakpairs"); -"perf_rep" printf("performance_report"); -"pptmsg" printf("pinpoint_message"); -"plcstate" printf("place_state"); -"prvctdan" printf("previous_continued_action"); -"prtstats" printf("printstats"); -"pgm_name" printf("program_name"); -"prtcomst" printf("protcomst"); -"rdblefrm" printf("readable_form"); -"realrjct" printf("real_reject"); -"rallocar" printf("reallocate_array"); -"rjctused" printf("reject_really_used"); -"rulelnno" printf("rule_linenum"); -"ruletype" printf("rule_type"); -"stinpfle" printf("set_input_file"); -"setupia" printf("set_up_initial_allocations"); -"startime" printf("starttime"); -"ste_type" printf("state_type"); -"symfollo" printf("symfollowset"); -"sympartn" printf("sympartition"); -"syntxerr" printf("syntaxerror"); -"tmpactfl" printf("temp_action_file"); -"todohead" printf("todo_head"); -"todonext" printf("todo_next"); -"trnschar" printf("transchar"); -"trnstout" printf("transition_struct_out"); -"trlcntxt" printf("trlcontxt"); -"vtrailrl" printf("variable_trail_rule"); -"vtrlctrl" printf("variable_trailing_context_rules"); -"varlngth" printf("varlength"); -"yycrbffr" printf("yy_create_buffer"); -"yydlbffr" printf("yy_delete_buffer"); -"yyinbffr" printf("yy_init_buffer"); -"yyldbfst" printf("yy_load_buffer_state"); -"yyswtobf" printf("yy_switch_to_buffer"); -"yyerrflg" printf("yyerrflag"); -"yymrreus" printf("yymore_really_used"); -"yymrused" printf("yymore_used"); -"yyrestrt" printf("yyrestart"); -. ECHO; -%% -main() -{ - yylex(); -} diff --git a/commands/flex-2.5.4/MISC/Macintosh/THINK_C_notes b/commands/flex-2.5.4/MISC/Macintosh/THINK_C_notes deleted file mode 100644 index e99c97227..000000000 --- a/commands/flex-2.5.4/MISC/Macintosh/THINK_C_notes +++ /dev/null @@ -1,100 +0,0 @@ -Notes on the THINK C version of Flex 2.4.6 -Scott Hofmann 23-JUL-94 -Internet: scotth@visix.com - -The only changes needed to compile Flex 2.4.6 under Symantec C++ 6.0 was -to #include in main.c and call ccommand() just before flexinit() -in main(). The notes below are mostly of historical significance only; most -of the workarounds below were to get around restrictions/problems in earlier -versions of THINK C. The only section which still applies is Russell Finn's -description of how to make Flex generate output of type 'KAHL'. Also, 4-byte -ints must be used by any project which uses Flex output. - -If you want to recreate the project, you'll need to add the files -alloca.c and xmalloc.c in this directory. Both files are copylefted; see -the GNU General Public License for details. You will also need to recompile -both the ANSI and unix libraries to use 4 byte ints, and if you want the -files that flex creates to have 'KAHL' as the creator you'll need to apply -Russell Finn's patch. - -Notes on the THINK C version of Flex 2.3.7 -Jonas Barklund, 25-JAN-92 -Internet: jonas@csd.uu.se - -I have merged the sources for Flex version 2.3.7 with the older version -which was hacked for THINK C version 4. I have conditionalized the code -so that I think it should work with both THINK C version 4 and 5 (for -those of you who don't know: the THINK_C symbol is defined as 1 in version -4 and as 5 in version 5). I have put in some missing prototypes, so it -compiles also with "require prototypes" on. - -Most of the notes below still apply, in particular that about the MakeRes -program. - - -Notes on the THINK C version of Flex -Russell S. Finn, 19-FEB-90 -Internet: rsfinn@athena.mit.edu, rsfinn@neutron.lcs.mit.edu -CompuServe: 76377,1107 -GEnie: RSFINN - -Flex appears to be covered by a copyright notice from the University of -California, similar to the one covering Berkeley Unix; the Free Software -Foundation is not part of the picture here. So here is a version -created with THINK C 4.0, along with the source code; as with the -Bison distribution, I am including *all* of the source code I received -with the package. - -The current version (modification date January 25, 1990) has only the -bare-bones interface provided by the THINK C library routine "ccommand", -which allows the user to type a command line and to redirect the output. -Perhaps someday I may try to implement a "real" user interface; perhaps -not. - -The only modifications made to the source file are surrounded by "#ifdef -THINK_C"..."#endif"; in theory, then, these sources could be recompiled -on another system if necessary. These are the actual files modified: -alloca.c, dfa.c, flexdef.h, main.c, misc.c, scan.c, sym.c. Most of these -changes were minor, and many of them would have been unnecessary if the -original Flex source code had been written for an ANSI-compliant C compiler. -In addition, the file "macutils.c" is completely new; see the discussion -of "MakeRes" below. - -THINK C users may find it convenient to have the output text files written -by Flex be THINK C documents. To do this, create a copy of the "ANSI" -project called "ANSI-KAHL", and a copy of the file "fopen.c" called -"fopen-KAHL.c". In the copy, find the routine "setfiletype", and replace -the lines: - if (!(oflag & F_BINARY)) - pb.ioFlFndrInfo.fdType = 'TEXT'; -with the lines: - if (!(oflag & F_BINARY)) { - pb.ioFlFndrInfo.fdType = 'TEXT'; - pb.ioFlFndrInfo.fdCreator = 'KAHL'; - } -Replace "fopen.c" with the new "fopen-KAHL.c", rebuild the new project -"ANSI-KAHL", and use this project in the project file "Flex.¹" -instead of the "ANSI" project. - -** The "MakeRes" program - -The output files created by Flex contain large amounts of preinitialized -static data; the file "scan.c" contained in the Flex.¹ project is one -such file. However, the Macintosh architecture limits normal applications -to 32K of global data. In many cases (including Flex), this limit can -be surpassed by the static data generated by Flex. - -The solution I have implemented for the THINK C version of Flex is to -extract the data tables from the Flex output file, and paste them into -the file "MakeRes.c". Then, by recompiling and running the program in -the "MakeRes.¹" project (it is not necessary to create an application), -a resource file called "Flex.¹.rsrc" is created in the current directory. -The Flex output file "scan.c" has been modified to load the static data -from the resource fork of the Flex application. This is done by calling -the "load_table" function, which is defined in the file "macutils.c". - -In the application for which I needed Flex, the data tables were small -enough that I didn't need to do this. However, if your application -requires you to do this, simply follow the model of "scan.c"; the MakeRes -project and source code has been included for your use. - diff --git a/commands/flex-2.5.4/MISC/Macintosh/alloca.c b/commands/flex-2.5.4/MISC/Macintosh/alloca.c deleted file mode 100644 index 9cb6fa036..000000000 --- a/commands/flex-2.5.4/MISC/Macintosh/alloca.c +++ /dev/null @@ -1,195 +0,0 @@ -/* - alloca -- (mostly) portable public-domain implementation -- D A Gwyn - - last edit: 86/05/30 rms - include config.h, since on VMS it renames some symbols. - Use xmalloc instead of malloc. - - This implementation of the PWB library alloca() function, - which is used to allocate space off the run-time stack so - that it is automatically reclaimed upon procedure exit, - was inspired by discussions with J. Q. Johnson of Cornell. - - It should work under any C implementation that uses an - actual procedure stack (as opposed to a linked list of - frames). There are some preprocessor constants that can - be defined when compiling for your specific system, for - improved efficiency; however, the defaults should be okay. - - The general concept of this implementation is to keep - track of all alloca()-allocated blocks, and reclaim any - that are found to be deeper in the stack than the current - invocation. This heuristic does not reclaim storage as - soon as it becomes invalid, but it will do so eventually. - - As a special case, alloca(0) reclaims storage without - allocating any. It is a good idea to use alloca(0) in - your main control loop, etc. to force garbage collection. -*/ -#ifndef lint -static char SCCSid[] = "@(#)alloca.c 1.1"; /* for the "what" utility */ -#endif - -#ifdef emacs -#include "config.h" -#ifdef static -/* actually, only want this if static is defined as "" - -- this is for usg, in which emacs must undefine static - in order to make unexec workable - */ -#ifndef STACK_DIRECTION -you -lose --- must know STACK_DIRECTION at compile-time -#endif /* STACK_DIRECTION undefined */ -#endif /* static */ -#endif /* emacs */ - -#ifndef alloca /* If compiling with GCC, this file's not needed. */ - -#ifdef __STDC__ -typedef void *pointer; /* generic pointer type */ -#else -typedef char *pointer; /* generic pointer type */ -#endif - -#define NULL 0 /* null pointer constant */ - -extern void free(); -extern pointer xmalloc(); - -/* - Define STACK_DIRECTION if you know the direction of stack - growth for your system; otherwise it will be automatically - deduced at run-time. - - STACK_DIRECTION > 0 => grows toward higher addresses - STACK_DIRECTION < 0 => grows toward lower addresses - STACK_DIRECTION = 0 => direction of growth unknown -*/ - -#ifndef STACK_DIRECTION -#define STACK_DIRECTION 0 /* direction unknown */ -#endif - -#if STACK_DIRECTION != 0 - -#define STACK_DIR STACK_DIRECTION /* known at compile-time */ - -#else /* STACK_DIRECTION == 0; need run-time code */ - -static int stack_dir; /* 1 or -1 once known */ -#define STACK_DIR stack_dir - -static void -find_stack_direction (/* void */) -{ - static char *addr = NULL; /* address of first - `dummy', once known */ - auto char dummy; /* to get stack address */ - - if (addr == NULL) - { /* initial entry */ - addr = &dummy; - - find_stack_direction (); /* recurse once */ - } - else /* second entry */ - if (&dummy > addr) - stack_dir = 1; /* stack grew upward */ - else - stack_dir = -1; /* stack grew downward */ -} - -#endif /* STACK_DIRECTION == 0 */ - -/* - An "alloca header" is used to: - (a) chain together all alloca()ed blocks; - (b) keep track of stack depth. - - It is very important that sizeof(header) agree with malloc() - alignment chunk size. The following default should work okay. -*/ - -#ifndef ALIGN_SIZE -#define ALIGN_SIZE sizeof(double) -#endif - -typedef union hdr -{ - char align[ALIGN_SIZE]; /* to force sizeof(header) */ - struct - { - union hdr *next; /* for chaining headers */ - char *deep; /* for stack depth measure */ - } h; -} header; - -/* - alloca( size ) returns a pointer to at least `size' bytes of - storage which will be automatically reclaimed upon exit from - the procedure that called alloca(). Originally, this space - was supposed to be taken from the current stack frame of the - caller, but that method cannot be made to work for some - implementations of C, for example under Gould's UTX/32. -*/ - -static header *last_alloca_header = NULL; /* -> last alloca header */ - -pointer -alloca (size) /* returns pointer to storage */ - unsigned size; /* # bytes to allocate */ -{ - auto char probe; /* probes stack depth: */ - register char *depth = &probe; - -#if STACK_DIRECTION == 0 - if (STACK_DIR == 0) /* unknown growth direction */ - find_stack_direction (); -#endif - - /* Reclaim garbage, defined as all alloca()ed storage that - was allocated from deeper in the stack than currently. */ - - { - register header *hp; /* traverses linked list */ - - for (hp = last_alloca_header; hp != NULL;) - if ((STACK_DIR > 0 && hp->h.deep > depth) - || (STACK_DIR < 0 && hp->h.deep < depth)) - { - register header *np = hp->h.next; - - free ((pointer) hp); /* collect garbage */ - - hp = np; /* -> next header */ - } - else - break; /* rest are not deeper */ - - last_alloca_header = hp; /* -> last valid storage */ - } - - if (size == 0) - return NULL; /* no allocation required */ - - /* Allocate combined header + user data storage. */ - - { - register pointer new = xmalloc (sizeof (header) + size); - - /* address of header */ - - ((header *)new)->h.next = last_alloca_header; - ((header *)new)->h.deep = depth; - - last_alloca_header = (header *)new; - - /* User storage begins just after header. */ - - return (pointer)((char *)new + sizeof(header)); - } -} - -#endif /* no alloca */ diff --git a/commands/flex-2.5.4/MISC/Macintosh/alloca.h b/commands/flex-2.5.4/MISC/Macintosh/alloca.h deleted file mode 100644 index f48eaf2f7..000000000 --- a/commands/flex-2.5.4/MISC/Macintosh/alloca.h +++ /dev/null @@ -1,10 +0,0 @@ -/**************** -** alloca.h -** -** header for alloca() -*****************/ - -typedef void *pointer; - -pointer alloca(unsigned size); - diff --git a/commands/flex-2.5.4/MISC/Macintosh/xmalloc.c b/commands/flex-2.5.4/MISC/Macintosh/xmalloc.c deleted file mode 100644 index 5bef83197..000000000 --- a/commands/flex-2.5.4/MISC/Macintosh/xmalloc.c +++ /dev/null @@ -1,69 +0,0 @@ -/* xmalloc.c -- malloc with out of memory checking - Copyright (C) 1990, 1991 Free Software Foundation, Inc. - - This program is free software; you can redistribute it and/or modify - it under the terms of the GNU General Public License as published by - the Free Software Foundation; either version 2, or (at your option) - any later version. - - This program is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - GNU General Public License for more details. - - You should have received a copy of the GNU General Public License - along with this program; if not, write to the Free Software - Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ - -#if STDC_HEADERS || THINK_C -#include -#else -char *malloc (); -char *realloc (); -void free (); -#endif - -#ifdef THINK_C -#define error(x, y, z) perror(z) /* Throw out meaningless arguments */ -#else -void error (); -#endif - -/* Allocate N bytes of memory dynamically, with error checking. */ - -char * -xmalloc (n) - unsigned n; -{ - char *p; - - p = malloc (n); - if (p == 0) - /* Must exit with 2 for `cmp'. */ - error (2, 0, "virtual memory exhausted"); - return p; -} - -/* Change the size of an allocated block of memory P to N bytes, - with error checking. - If P is NULL, run xmalloc. - If N is 0, run free and return NULL. */ - -char * -xrealloc (p, n) - char *p; - unsigned n; -{ - if (p == 0) - return xmalloc (n); - if (n == 0) - { - free (p); - return 0; - } - p = realloc (p, n); - if (p == 0) - /* Must exit with 2 for `cmp'. */ - error (2, 0, "virtual memory exhausted"); - return p; -} diff --git a/commands/flex-2.5.4/MISC/NT/Makefile b/commands/flex-2.5.4/MISC/NT/Makefile deleted file mode 100644 index 581d49778..000000000 --- a/commands/flex-2.5.4/MISC/NT/Makefile +++ /dev/null @@ -1,103 +0,0 @@ -# -# make file for "flex" tool -# @(#) $Header: /usr/fsys/odin/a/vern/flex/RCS/Makefile,v 2.9 -# 90/05/26 17:28:44 vern Exp $ (LBL) -# -# the first time around use "nmake f_flex" -# -# This makefile is specific for Microsoft's Visual C 2.0, & nmake -# -# - Stan Adermann -# - - -SKELFLAGS = -DDEFAULT_SKELETON_FILE=\"c:/src/flex/flex.skl\" -CFLAGS = -nologo -W2 -F 8000 -Ox -DUSG -LDFLAGS = /nologo /BATCH /STACK:8000 -FLEX_FLAGS = -ist8 -Sflex.skl - -FLEX = .\flex.exe -CC = cl -YACC = c:\lib\byacc -MAKE = nmake /nologo - -FLEXOBJS = \ - ccl.obj \ - dfa.obj \ - ecs.obj \ - gen.obj \ - main.obj \ - misc.obj \ - nfa.obj \ - parse.obj \ - scan.obj \ - skel.obj \ - sym.obj \ - tblcmp.obj \ - yylex.obj - -FLEX_C_SOURCES = \ - ccl.c \ - dfa.c \ - ecs.c \ - gen.c \ - main.c \ - misc.c \ - nfa.c \ - parse.c \ - scan.c \ - skel.c \ - sym.c \ - tblcmp.c \ - yylex.c - -all : flex.exe - -flex.exe : $(FLEXOBJS) - link $(LDFLAGS) $(FLEXOBJS) -out:$*.exe - -f_flex: - copy initscan.c scan.c - touch scan.c - @echo compiling first flex - $(MAKE) flex.exe - del scan.c - @echo using first flex to generate final version... - $(MAKE) flex.exe - -# -# general inference rule -# -.c.obj: - $(CC) -c $(CFLAGS) $*.c - -parse.h parse.c : parse.y - $(YACC) -d parse.y - @move y_tab.c parse.c - @move y_tab.h parse.h - -scan.c : scan.l - $(FLEX) $(FLEX_FLAGS) $(COMPRESSION) scan.l >scan.c - - -scan.obj : scan.c parse.h flexdef.h - -main.obj : main.c flexdef.h - $(CC) $(CFLAGS) -c $(SKELFLAGS) main.c - -ccl.obj : ccl.c flexdef.h -dfa.obj : dfa.c flexdef.h -ecs.obj : ecs.c flexdef.h -gen.obj : gen.c flexdef.h -misc.obj : misc.c flexdef.h -nfa.obj : nfa.c flexdef.h -parse.obj : parse.c flexdef.h -sym.obj : sym.c flexdef.h -tblcmp.obj : tblcmp.c flexdef.h -yylex.obj : yylex.c flexdef.h -skel.obj : skel.c flexdef.h - - -clean : - del *.obj - del *.map diff --git a/commands/flex-2.5.4/MISC/NT/config.h b/commands/flex-2.5.4/MISC/NT/config.h deleted file mode 100644 index 17e831a95..000000000 --- a/commands/flex-2.5.4/MISC/NT/config.h +++ /dev/null @@ -1,32 +0,0 @@ -/* config.h. Generated automatically by configure. */ -/* $Header: /home/daffy/u0/vern/flex/RCS/conf.in,v 1.2 95/01/09 -12:11:51 vern Exp $ */ - -/* Define to empty if the keyword does not work. */ -/* #undef const */ - -/* Define to `unsigned' if doesn't define. */ -/* #undef size_t */ - -/* Define if you have the ANSI C header files. */ -#define STDC_HEADERS 1 - -/* Define if you have the header file. */ -#define HAVE_MALLOC_H 1 - -/* Define if you have the header file. */ -#define HAVE_STRING_H 1 - -/* Define if you have the header file. */ -#define HAVE_SYS_TYPES_H 1 - -/* Define if you have and it should be used (not on -Ultrix). */ -#define HAVE_ALLOCA_H 0 - -/* Define if platform-specific command line handling is necessary. */ -/* #undef NEED_ARGV_FIXUP */ - -/* Define if you use FAT file system, leave undefined for NTFS */ -#undef SHORT_FILE_NAMES -/* #define SHORT_FILE_NAMES 1 */ diff --git a/commands/flex-2.5.4/MISC/NeXT b/commands/flex-2.5.4/MISC/NeXT deleted file mode 100644 index f862a1f43..000000000 --- a/commands/flex-2.5.4/MISC/NeXT +++ /dev/null @@ -1,34 +0,0 @@ -this API is not documented/supported by NeXT and may go away at any time, - so test again when you upgrade (works fine for me on NEXTSTEP_Dev_3.2) -------------------------------------------------------------------------- -See KBNS.32.2.029 from the successor of: -ftp://ftp.cs.orst.edu/software/NeXT/documents/KBNS.32.1.rtf -Otherwise (that successor not yet having been published), ask me for a copy -of the item on RfSchtkt@maze.ruca.ua.ac.be. Bison's messages are not as -disciplined as flex' ones, so it should get more discipline first. - -Specifically (in addition to what's described in the KBNS item): -makeUser.o and make_support.o should be added to OBJECTS in Makefile.in -In parse.y, line_pinpoint() (assumption all messages ultimately go there), add: - make_support( - // don't worry about declaring: cc's source doesn't either, - // it seems - syntaxerror?0:1, - NULL, - infilename, - line, - str, - 0,0,0 - ); - -FMyIO: in cc, these files contain the word make_support: - ChangeLog-NeXT - Makefile.in - config/next.h: defines REPORT_EVENT in terms of make_support - make_support.c - -FMyIO: in cc, these files contain the word REPORT_EVENT: - cccp.c - config/next.h - gcc.c - toplev.c diff --git a/commands/flex-2.5.4/MISC/OS2/Makefile.os2 b/commands/flex-2.5.4/MISC/OS2/Makefile.os2 deleted file mode 100644 index e984f6de2..000000000 --- a/commands/flex-2.5.4/MISC/OS2/Makefile.os2 +++ /dev/null @@ -1,72 +0,0 @@ -# make file for "flex" tool, emx+gcc - -release: - $(MAKE) -f Makefile.os2 flex.exe \ - CC="gcc -Zomf -O" O=".obj" A=".lib" AR="emxomfar" \ - LDFLAGS="-s -Zcrtdll -Zstack 512" -debug: - $(MAKE) -f Makefile.os2 flex.exe \ - CC="gcc -g" O=".o" A=".a" AR="ar" - -CFLAGS = -DOS2 -DSHORT_FILE_NAMES - -YACC = bison -FLEX = flex -FLEX_FLAGS = -ist - -.SUFFIXES: .c $O - -.c$O: - $(CC) $(CFLAGS) -c $< - -FLEXLIB = fl$A -FLEXOBJS = ccl$O dfa$O ecs$O gen$O main$O misc$O nfa$O parse$O \ - scan$O skel$O sym$O tblcmp$O yylex$O -LIBOBJS = libmain$O libyywrap$O - -flex.exe : $(FLEXOBJS) $(FLEXLIB) - $(CC) $(LDFLAGS) -o $@ $(FLEXOBJS) $(FLEXLIB) - -first_flex: - cp initscan.c scan.c - $(MAKE) $(MFLAGS) flex - -$(FLEXLIB): $(LIBOBJS) - $(AR) cru $(FLEXLIB) $(LIBOBJS) - $(AR) s $(FLEXLIB) - -parse.h parse.c: parse.y - $(YACC) -d -o parse.c parse.y - -scan.c : scan.l - $(FLEX) $(FLEX_FLAGS) $(COMPRESSION) scan.l >scan.c - -scan$O : scan.c parse.h flexdef.h - -main$O : main.c flexdef.h -ccl$O : ccl.c flexdef.h -dfa$O : dfa.c flexdef.h -ecs$O : ecs.c flexdef.h -gen$O : gen.c flexdef.h -misc$O : misc.c flexdef.h -nfa$O : nfa.c flexdef.h -parse$O : parse.c flexdef.h -sym$O : sym.c flexdef.h -tblcmp$O : tblcmp.c flexdef.h -yylex$O : yylex.c flexdef.h - -skel.c: flex.skl mkskel.sh - $(SHELL) mkskel.sh flex.skl >skel.c - -test : flex - flex $(FLEX_FLAGS) $(COMPRESSION) scan.l | diff scan.c - - -bigtest : - rm -f scan.c ; $(MAKE) COMPRESSION="-C" test - rm -f scan.c ; $(MAKE) COMPRESSION="-Ce" test - rm -f scan.c ; $(MAKE) COMPRESSION="-Cm" test - rm -f scan.c ; $(MAKE) COMPRESSION="-Cfe" test - rm -f scan.c ; $(MAKE) COMPRESSION="-CFe" test - rm -f scan.c ; $(MAKE) COMPRESSION="-Cf" test - rm -f scan.c ; $(MAKE) COMPRESSION="-CF" test - rm -f scan.c ; $(MAKE) diff --git a/commands/flex-2.5.4/MISC/OS2/config.h b/commands/flex-2.5.4/MISC/OS2/config.h deleted file mode 100644 index acf7b8637..000000000 --- a/commands/flex-2.5.4/MISC/OS2/config.h +++ /dev/null @@ -1,28 +0,0 @@ -/* ------------------------------------------------ */ -/* version of config.h for OS/2 */ -/* ------------------------------------------------ */ - -/* Define to empty if the keyword does not work. */ -#undef const - -/* Define to `unsigned' if doesn't define. */ -#undef size_t - -/* Define if you have the ANSI C header files. */ -#define STDC_HEADERS 1 - -/* Define if you have the header file. */ -#define HAVE_MALLOC_H 1 - -/* Define if you have the header file. */ -#define HAVE_STRING_H 1 - -/* Define if you have the header file. */ -#define HAVE_SYS_TYPES_H 1 - -/* Define if you have and it should be used (not on Ultrix). */ -#define HAVE_ALLOCA_H - -/* Define if platform-specific command line handling is necessary. */ -#define NEED_ARGV_FIXUP -#define argv_fixup(ac,av) { _response(ac,av); _wildcard(ac,av);} diff --git a/commands/flex-2.5.4/MISC/README b/commands/flex-2.5.4/MISC/README deleted file mode 100644 index dc16b0233..000000000 --- a/commands/flex-2.5.4/MISC/README +++ /dev/null @@ -1,76 +0,0 @@ -Miscellaneous flex stuff. The items which have been tested with flex 2.5 are: - - - texinfo/, a subdirectory containing a "texinfo" version of flex(1) - and the corresponding "info" files (contributed by Francois Pinard). - - - VMS/, a subdirectory containing makefiles, configuration files, - run-time support, and installation notes for building flex 2.5 - on VMS (contributed by Pat Rankin). - - - Borland/ - makefile and config.h for Borland 4.02 compiler - (contributed by Terrence O Kane, who notes that no source - code changes were necessary). - - - NT/ - Makefile and config.h for NT, contributed by Stan Adermann. - - - OS2/ - Makefile and config.h for building flex under OS/2, - contributed by Kai Uwe Rommel. - - - Amiga/: notes on building flex for the Amiga, contributed - by Andreas Scherer. - - - parse.c, parse.h - output of running yacc (byacc, actually) - on parse.y. If your system doesn't have a flavor of yacc available, - copy these into the main flex source directory instead. - - - flex.man - preformatted version of flex man page - - -The following have been tested using flex 2.4: - - - debflex.awk, an awk script for anotating flex debug output. - It presently only works with gawk and mawk, not with "old" - or "new" awk. - - - NeXT: ProjectBuilder.app support for use in the NeXT world. - - - Notes on building flex for the Macintosh using Think-C, - in the Macintosh/ subdirectory. - - - testxxLexer.l, a sample C++ program that uses flex's scanner - class option ("-+"). - - - fastwc/, a subdirectory containing examples of how to use flex - to write progressively higher-performance versions of the Unix - "wc" utility. This certainly should work with 2.5, but hasn't - been tested. - - - Borland.old/: notes on building flex 2.4 for Borland C++ 3.1 - on MS-DOS. These shouldn't be needed for flex 2.5. Included - only in case you encounter unanticipated difficulties. - - - EBCDIC: contact information for building flex for EBCDIC. - - -The following are all out-of-date with respect to flex release 2.4 (and -in general up-to-date for flex 2.3): - - - Atari/Atari.patches, patches for porting flex to the Atari and - to Minix. - - - A number of notes and Makefiles for compiling flex under MS-DOS, - in the MSDOS/ subdirectory. - - - Notes on building flex for MVS, in the MVS/ subdirectory. - -If any of this is out-of-date and can be deleted, please let me know. - -And the following is included for compatibility with some broken versions -of bison: - - - alloca.c, a public-domain, mostly-portable version of the - alloca() routine (used by bison's parsers) written by D. A. Gwyn. - - -Many thanks to those who contributed these files. Updated versions will -be appreciated! diff --git a/commands/flex-2.5.4/MISC/VMS/README.VMS b/commands/flex-2.5.4/MISC/VMS/README.VMS deleted file mode 100644 index e4a49660c..000000000 --- a/commands/flex-2.5.4/MISC/VMS/README.VMS +++ /dev/null @@ -1,83 +0,0 @@ -Brief instructions for building flex 2.5.x for VMS: - - 0) if you have either MMS (from Digital) or MMK (freeware) for use -as a `make' utility, follow the directions in steps #1 through #5 below. -If not, execute - @BUILD.COM xxxC -where "xxxC" is either "VAXC" or "DECC" or "GNUC", and then skip to -step #5. - - 1) set default to the source directory (not the [.MISC.VMS] subdirectory -where this file is located). - - 2) COPY [.MISC.VMS]DESCRIP.MMS []*.* -(Recursive invocations of `make' for the `bigcheck' test assume that the -makefile will be found as descrip.mms in the current directory.) - -To build with VAX C for VAX/VMS: - 3) MMS /MACRO=("VAXC=1") FLEX.EXE -(The /macro qualifier is optional in this case.) - -To build with GNU C for VAX/VMS: - 2.5) possibly edit descrip.mms to uncomment `SET COMMAND' for GCCINIT, - depending on local site configuration - 3) MMS /MACRO=("GNUC=1") FLEX.EXE - -To build with DEC C for either VAX/VMS or Alpha/VMS: - 3) MMS /MACRO=("DECC=1") FLEX.EXE -(Expect one or two informational messages from the compiler about -implicitly declared functions.) - -Minimal testing of the resulting program: - 4) MMS CHECK -(If `diff' reports no warnings, the test has succeeded.) - -More thorough testing: - 4.5) MMS /MACRO=("xxxC=1") BIGCHECK ! "xxxC=1" as in step #3 above -(If using an older version of MMK rather than MMS, this might fail when -`make' is invoked recursively due to excessive BYTLM usage by MMK.) - -Installation (the VMS makefile does not support an `install' target; -you'll need to do this part manually): - 5) copy flex.exe, flex.doc, flex.skl, flexlib.olb, and FlexLexer.h to -location(s) appropriate for your site. To use flex, define a "foreign" -command by making a DCL symbol whose value begins with a dollar sign -immediately followed by the filename for flex.exe, as in - $ flex :== $local_tools:flex.exe -where `local_tools:' is the logical name pointing to flex.exe's location. -This symbol will ordinarily be a candidate for your login.com. When -invoking flex, upper- or mixed-case command line options must be enclosed -in quotes. For example, - $ flex "-Pxyz" "-L" -t mylexer.l > mylexer.c -(use prefix "xyz" instead of "yy", suppress `#line' compiler directives -in the output, write the output to `stdout', process file mylexer.l, -and capture `stdout' in file mylexer.c). As illustrated here, this VMS -version of flex supports emulation of command line I/O redirection used -by Unix shells. - - flex.exe -- the executable image for the flex program; - flex.doc -- documentation, the "man page" describing flex (flex.1 - processed with `nroff -man' followed by `col -b'); - flex.skl -- a text file containing flex's default skeleton; - with this version of flex, it is for reference only; - flex.exe does not need to know where to find it; - flexlib.olb -- an object library containing some support routines; - you might need to link your generated lexer against - it, depending on how your program is designed; - flex.exe does not access it; it corresponds to - `libfl.a' under Unix; - FlexLexer.h -- header file used for C++ class-based lexers; not - needed for ordinary C lexers. - -Notes: - This VMS port of flex supports only the original Unix command line -interface, not the native DCL interface which was available for flex 2.3. - - build.com -- DCL command procedure as alternative to descrip.mms; - descrip.mms -- 2.5.x makefile for use with MMS or MMK (see step #1); - mkskel.tpu -- TPU program used to make skel.c from flex.skl for full - build from scratch; performs same function as mkskel.sh; - vms-conf.h -- pre-configured `conf.in', copied to [-.-]config.h; - vms-code.c -- VMS-specific support code, copied to [-.-]vms-code.c; - README.VMS -- this file - diff --git a/commands/flex-2.5.4/MISC/VMS/build.com b/commands/flex-2.5.4/MISC/VMS/build.com deleted file mode 100644 index dbde55ab0..000000000 --- a/commands/flex-2.5.4/MISC/VMS/build.com +++ /dev/null @@ -1,155 +0,0 @@ -$! VMS build procedure for flex 2.5.x; -$ v = 'f$verify(0)' -$! -$! usage: -$! $ @[.MISC.VMS]BUILD.COM compiler parser [test] -$! where `compiler' is either "GNUC" or "DECC" or "VAXC" or empty -$! and `parser' is either "BISON" or "BYACC" or "YACC" or empty -$! and `[test]' is either "CHECK-ONLY" or "NO-CHECK" or empty -$! empty compiler defaults to VAX C (even under Alpha/VMS); -$! special "LINK" compiler value does link without compilation; -$! empty parser defaults to using supplied parse code in [.MISC]; -$! optional test is performed by default. -$! -$ -$! we start from [.MISC.VMS], then move to the main source directory -$ where = f$parse("_._;",f$environ("PROCEDURE")) - "_._;" -$ set default 'where' -$ brkt = f$extract(f$length(where)-1,1,where) -$ if f$locate(".MISC.VMS"+brkt,where).lt.f$length(where) then - - set default 'f$string(f$extract(0,1,f$dir()) + "-.-" + brkt)' -$ -$ p1 := 'p1' -$ p2 := 'p2' -$ p3 := 'p3' -$ if p1.eqs."LINK" then goto link -$ if p3.eqs."CHECK-ONLY" then goto check -$ p2 = p2 - "_PARSER" -$! -$ CDEFS = "/Define=(""VMS"")" ! =(""VMS"",""DEFAULT_CSIZE=256"") -$! -$ if p1.eqs."GNUC" -$ then CC = "gcc" -$ CFLAGS = "/noList/Opt=2/Debug/noVerbose" -$ LIBS = "gnu_cc:[000000]gcclib.olb/Library, sys$library:vaxcrtl.olb/Library" -$ else CC = "cc" -$ if p1.eqs."DECC" -$ then CFLAGS = "/noList/Prefix=All" -$ LIBS = "" -$ if f$trnlnm("DECC$CC_DEFAULT").nes."" then CC = CC + "/DECC" -$ else CFLAGS = "/noList/Optimize=noInline" -$ LIBS = "sys$share:vaxcrtl.exe/Shareable" -$ if f$trnlnm("DECC$CC_DEFAULT").nes."" then CC = CC + "/VAXC" -$ if p1.nes."" .and. p1.nes."VAXC" then exit %x002C -$ endif -$ endif -$! -$ no_parser = 0 -$ if p2.eqs."BISON" -$ then YACC = "bison" -$ YACCFLAGS = "/Defines/Fixed_Outfiles" -$ ALLOCA = ",[]alloca.obj" -$ else -$ YACCFLAGS = "-d" -$ ALLOCA = "" -$ if p2.eqs."BYACC" .or. p2.eqs."YACC" -$ then YACC = f$edit(p2,"LOWERCASE") -$ else YACC = "! yacc" -$ if p2.nes."" .and. p2.nes."NO" .and. p2.nes."NONE" then exit %x002C -$ no_parser = 1 -$ endif -$ endif -$! -$ ECHO = "write sys$output" -$ COPY = "copy_" -$ MOVE = "rename_/New_Vers" -$ MUNG = "search_/Exact/Match=NOR" -$ PURGE = "purge_/noConfirm/noLog" -$ REMOVE = "delete_/noConfirm/noLog" -$ TPU = "edit_/TPU/noJournal/noDisplay/noSection" -$! -$ if v then set verify -$! -$ 'COPY' [.misc.vms]vms-conf.h config.h -$ 'COPY' [.misc.vms]vms-code.c vms-code.c -$ 'COPY' [.misc]flex.man flex.doc -$ if ALLOCA.nes."" then 'COPY' [.MISC]alloca.c alloca.c -$ 'COPY' initscan.c scan.c !make.bootstrap -$! -$ if f$search("skel.c").nes."" then - - if f$cvtime(f$file_attr("skel.c","RDT")).gts. - - f$cvtime(f$file_attr("flex.skl","RDT")) then goto skip_mkskel -$ 'TPU' /Command=[.misc.vms]mkskel.tpu flex.skl /Output=skel.c -$skip_mkskel: -$! -$ if f$search("parse.c").nes."" .and. f$search("parse.h").nes."" then - - if f$cvtime(f$file_attr("parse.c","RDT")).gts. - - f$cvtime(f$file_attr("parse.y","RDT")) then goto skip_yacc -$ if f$search("y_tab.%").nes."" then 'REMOVE' y_tab.%;* -$ if no_parser -$ then 'COPY' [.misc]parse.% sys$disk:[]y_tab.* -$ else 'YACC' 'YACCFLAGS' parse.y -$ endif -$ 'MUNG' y_tab.c "#module","#line" /Output=parse.c -$ 'REMOVE' y_tab.c;* -$ 'MOVE' y_tab.h parse.h -$skip_yacc: -$! -$ 'CC' 'CFLAGS' 'CDEFS' /Include=[] ccl.c -$ 'CC' 'CFLAGS' 'CDEFS' /Include=[] dfa.c -$ 'CC' 'CFLAGS' 'CDEFS' /Include=[] ecs.c -$ 'CC' 'CFLAGS' 'CDEFS' /Include=[] gen.c -$ 'CC' 'CFLAGS' 'CDEFS' /Include=[] main.c -$ 'CC' 'CFLAGS' 'CDEFS' /Include=[] misc.c -$ 'CC' 'CFLAGS' 'CDEFS' /Include=[] nfa.c -$ 'CC' 'CFLAGS' 'CDEFS' /Include=[] parse.c -$ 'CC' 'CFLAGS' 'CDEFS' /Include=[] scan.c -$ 'CC' 'CFLAGS' 'CDEFS' /Include=[] skel.c -$ 'CC' 'CFLAGS' 'CDEFS' /Include=[] sym.c -$ 'CC' 'CFLAGS' 'CDEFS' /Include=[] tblcmp.c -$ 'CC' 'CFLAGS' 'CDEFS' /Include=[] yylex.c -$ 'CC' 'CFLAGS' 'CDEFS' /Include=[] vms-code.c -$ if ALLOCA.nes."" then - !bison - 'CC' 'CFLAGS' /Define=("STACK_DIRECTION=-1","xmalloc=yy_flex_xmalloc") alloca.c -$! -$ 'CC' 'CFLAGS' 'CDEFS' /Include=[] libmain.c -$ 'CC' 'CFLAGS' 'CDEFS' /Include=[] libyywrap.c -$ library/Obj flexlib.olb/Create libmain.obj,libyywrap.obj/Insert -$ if f$search("flexlib.olb;-1").nes."" then 'PURGE' flexlib.olb -$! -$ open/Write optfile sys$disk:[]crtl.opt -$ write optfile LIBS -$ close optfile -$ if f$search("crtl.opt;-1").nes."" then 'PURGE' crtl.opt -$! -$ version = "# flex ""2.5""" !default, overridden by version.h -$ open/Read/Error=v_h_2 hfile version.h -$ read/End=v_h_1 hfile version -$v_h_1: close/noLog hfile -$v_h_2: version = f$element(1,"""",version) -$ open/Write optfile sys$disk:[]ident.opt -$ write optfile "identification=""flex ''version'""" -$ close optfile -$ if f$search("ident.opt;-1").nes."" then 'PURGE' ident.opt -$! -$link: -$ link/noMap/Exe=flex.exe ccl.obj,dfa.obj,ecs.obj,gen.obj,main.obj,misc.obj,- - nfa.obj,parse.obj,scan.obj,skel.obj,sym.obj,tblcmp.obj,yylex.obj,- - vms-code.obj 'ALLOCA' ,flexlib.olb/Lib,- - sys$disk:[]crtl.opt/Opt,sys$disk:[]ident.opt/Opt -$! -$ if p3.eqs."NO-CHECK" .or. p3.eqs."NOCHECK" then goto done -$ -$check: -$ 'ECHO' "" -$ 'ECHO' " Checking with COMPRESSION=""""" -$ mcr sys$disk:[]flex.exe -t -p scan.l > scan.chk -$ diff_/Output=_NL:/Maximum_Diff=1 scan.c scan.chk -$ if $status -$ then 'ECHO' " Test passed." -$ 'REMOVE' scan.chk;* -$ else 'ECHO' "? Test failed!" -$ endif -$ -$done: -$ exit diff --git a/commands/flex-2.5.4/MISC/VMS/descrip.mms b/commands/flex-2.5.4/MISC/VMS/descrip.mms deleted file mode 100644 index 5b2859d34..000000000 --- a/commands/flex-2.5.4/MISC/VMS/descrip.mms +++ /dev/null @@ -1,311 +0,0 @@ -# descrip.mms -- makefile for building `flex' using MMS or MMK on VMS; -# created manually from Makefile.in -# flex 2.5.0 Jan'95 - -MAKEFILE = descrip.mms # from [.MISC.VMS] -MAKE = $(MMS) /Descr=$(MAKEFILE) -MAKEFLAGS = $(MMSQUALIFIERS) - -# Possible values for DEFS: -# "VMS" -- used just to make sure parentheses aren't empty; -# For flex to always generate 8-bit scanners, append -# ,"DEFAULT_CSIZE=256" inside /Define=() of DEFS. - -DEFS = /Define=("VMS") -LDFLAGS = /noMap - -# compiler handling -.ifdef GNUC -CC = gcc -GCCINIT = ! SET COMMAND GNU_CC:[000000]GCC -CFLAGS = /noList/Opt=2/Debug/noVerbose -LIBS = gnu_cc:[000000]gcclib.olb/Library, sys$library:vaxcrtl.olb/Library -C_CHOICE = "GNUC=1" -.else ! not GNU C -CC = cc -GCCINIT = -.ifdef DECC -CFLAGS = /noList/Prefix=All -LIBS = -C_CHOICE = "DECC=1" -.else ! not DEC C; assume VAX C -CFLAGS = /noList/Optimize=noInline -LIBS = sys$share:vaxcrtl.exe/Shareable -C_CHOICE = "VAXC=1" -.endif -.endif - -# parser handling -# mms/macro=("xxxC=1","zzz_parser=1"), where "zzz_parser" is -# either "bison_parser" or "byacc_parser" or "yacc_parser", -# otherwise assumed to be "no_parser"; and where "xxxC=1" is -# either "VAXC=1", "GNUC=1", or "DECC=1" as above -.ifdef bison_parser -YACC = bison -YACCFLAGS = /Defines/Fixed_Outfiles -YACCINIT = set command gnu_bison:[000000]bison -ALLOCA = ,[]alloca.obj # note leading comma -.else -YACCFLAGS = -d -YACCINIT = -ALLOCA = -.ifdef byacc_parser -YACC = byacc -.else -.ifdef yacc_parser -YACC = yacc -.else -# none of bison, byacc, or yacc specified -.ifdef no_parser -.else -no_parser=1 -.endif # -.endif #yacc -.endif #byacc -.endif #bison - -# VMS-specific hackery -ECHO = write sys$output # requires single quoted arg -COPY = copy_ # -MOVE = rename_/New_Vers # within same device only -MUNG = search_/Exact/Match=NOR # to strip unwanted `#module' directive -NOOP = continue # non-empty command that does nothing -PURGE = purge_/noConfirm/noLog # relatively quiet file removal -REMOVE = delete_/noConfirm/noLog # ditto -TOUCH = append_/New _NL: # requires single file arg -TPU = edit_/TPU/noJournal/noDisplay/noSection - -# You can define this to be "lex.exe" if you want to replace lex at your site. -FLEX =flex.exe -# note: there should be no whitespace between `=' and the name, -# or else $(FLEX_EXEC) below will not function properly. -FLEXLIB = flexlib.olb - -# You normally do not need to modify anything below this point. -# ------------------------------------------------------------ - -VMSDIR = [.MISC.VMS] -MISCDIR = [.MISC] -CURDIR = sys$disk:[] - -CPPFLAGS = $(DEFS)/Include=[] -LIBOPT = $(CURDIR)crtl.opt # run-time library(s) -ID_OPT = $(CURDIR)ident.opt # version identification - -.SUFFIXES : # avoid overhead of umpteen built-in rules -.SUFFIXES : .obj .c - -.c.obj : - $(CC)$(CFLAGS)$(CPPFLAGS) $< - -VMSHDRS = $(VMSDIR)vms-conf.h # copied to []config.h -VMSSRCS = $(VMSDIR)vms-code.c # copied to []vms-code.c -VMSOBJS = ,vms-code.obj # note leading comma - -HEADERS = flexdef.h version.h - -SOURCES = ccl.c dfa.c ecs.c gen.c main.c misc.c nfa.c parse.y \ - scan.l skel.c sym.c tblcmp.c yylex.c -OBJECTS = ccl.obj,dfa.obj,ecs.obj,gen.obj,main.obj,misc.obj,nfa.obj,parse.obj,\ - scan.obj,skel.obj,sym.obj,tblcmp.obj,yylex.obj $(VMSOBJS) $(ALLOCA) - -LIBSRCS = libmain.c libyywrap.c -LIBOBJS = libmain.obj,libyywrap.obj - -LINTSRCS = ccl.c dfa.c ecs.c gen.c main.c misc.c nfa.c parse.c \ - scan.c skel.c sym.c tblcmp.c yylex.c - -DISTFILES = README NEWS COPYING INSTALL FlexLexer.h \ - configure.in conf.in Makefile.in mkskel.sh flex.skl \ - $(HEADERS) $(SOURCES) $(LIBSRCS) MISC \ - flex.1 scan.c install.sh mkinstalldirs configure - -DIST_NAME = flex - -# flex options to use when generating scan.c from scan.l -COMPRESSION = -PERF_REPORT = -p -# which "flex" to use to generate scan.c from scan.l -FLEX_EXEC = mcr $(CURDIR)$(FLEX) -FLEX_FLAGS = -t $(PERF_REPORT) #$(COMPRESSION) - -MARKER = make.bootstrap - -##### targets start here ##### - -all : $(FLEX) flex.doc - @ $(NOOP) - -install : $(FLEX) flex.doc flex.skl $(FLEXLIB) FlexLexer.h - @ $(ECHO) "-- Installation must be done manually." - @ $(ECHO) " $+" - -.ifdef GCCINIT -.FIRST - $(GCCINIT) - -.endif #GCCINIT - -flex : $(FLEX) - @ $(NOOP) - -$(FLEX) : $(MARKER) $(OBJECTS) $(FLEXLIB) $(LIBOPT) $(ID_OPT) - $(LINK)/Exe=$(FLEX) $(LDFLAGS)\ - $(OBJECTS),$(FLEXLIB)/Lib,$(LIBOPT)/Opt,$(ID_OPT)/Opt - -$(MARKER) : initscan.c - @- if f$search("scan.c").nes."" then $(REMOVE) scan.c;* - $(COPY) initscan.c scan.c - @ $(TOUCH) $(MARKER) - -parse.c : parse.y - @- if f$search("y_tab.%").nes."" then $(REMOVE) y_tab.%;* -.ifdef no_parser - $(COPY) $(MISCDIR)parse.% $(CURDIR)y_tab.* -.else - $(YACCINIT) - $(YACC) $(YACCFLAGS) parse.y -.endif - $(MUNG) y_tab.c "#module","#line" /Output=parse.c - @- $(REMOVE) y_tab.c;* - $(MOVE) y_tab.h parse.h - -parse.h : parse.c - @ $(TOUCH) parse.h - -scan.c : scan.l - $(FLEX_EXEC) $(FLEX_FLAGS) $(COMPRESSION) scan.l > scan.c - -scan.obj : scan.c parse.h flexdef.h config.h -yylex.obj : yylex.c parse.h flexdef.h config.h - -skel.c : flex.skl $(VMSDIR)mkskel.tpu - $(TPU) /Command=$(VMSDIR)mkskel.tpu flex.skl /Output=skel.c - -main.obj : main.c flexdef.h config.h version.h -ccl.obj : ccl.c flexdef.h config.h -dfa.obj : dfa.c flexdef.h config.h -ecs.obj : ecs.c flexdef.h config.h -gen.obj : gen.c flexdef.h config.h -misc.obj : misc.c flexdef.h config.h -nfa.obj : nfa.c flexdef.h config.h -parse.obj : parse.c flexdef.h config.h -skel.obj : skel.c flexdef.h config.h -sym.obj : sym.c flexdef.h config.h -tblcmp.obj : tblcmp.c flexdef.h config.h -vms-code.obj : vms-code.c flexdef.h config.h - -[]alloca.obj : alloca.c - $(CC)$(CFLAGS)/Define=("STACK_DIRECTION=-1","xmalloc=yy_flex_xmalloc") alloca.c - -alloca.c : $(MISCDIR)alloca.c - $(COPY) $(MISCDIR)alloca.c alloca.c - -config.h : $(VMSDIR)vms-conf.h - $(COPY) $(VMSDIR)vms-conf.h config.h - -vms-code.c : $(VMSDIR)vms-code.c - $(COPY) $(VMSDIR)vms-code.c vms-code.c - -test : check - @ $(NOOP) -check : $(FLEX) - @ $(ECHO) "" - @ $(ECHO) " Checking with COMPRESSION="$(COMPRESSION)"" - $(FLEX_EXEC) $(FLEX_FLAGS) $(COMPRESSION) scan.l > scan.chk - diff_/Output=_NL:/Maximum_Diff=1 scan.c scan.chk - -bigcheck : - @- if f$search("scan.c").nes."" then $(REMOVE) scan.c;* - $(MAKE)$(MAKEFLAGS) /Macro=($(C_CHOICE),"COMPRESSION=""-C""") check - @- $(REMOVE) scan.c;* - $(MAKE)$(MAKEFLAGS) /Macro=($(C_CHOICE),"COMPRESSION=""-Ce""") check - @- $(REMOVE) scan.c;* - $(MAKE)$(MAKEFLAGS) /Macro=($(C_CHOICE),"COMPRESSION=""-Cm""") check - @- $(REMOVE) scan.c;* - $(MAKE)$(MAKEFLAGS) /Macro=($(C_CHOICE),"COMPRESSION=""-f""") check - @- $(REMOVE) scan.c;* - $(MAKE)$(MAKEFLAGS) /Macro=($(C_CHOICE),"COMPRESSION=""-Cfea""") check - @- $(REMOVE) scan.c;* - $(MAKE)$(MAKEFLAGS) /Macro=($(C_CHOICE),"COMPRESSION=""-CFer""") check - @- $(REMOVE) scan.c;* - $(MAKE)$(MAKEFLAGS) /Macro=($(C_CHOICE),"COMPRESSION=""-l""","PERF_REPORT=") check - @- $(REMOVE) scan.c;*,scan.chk;* - $(MAKE)$(MAKEFLAGS) $(FLEX) - @- $(PURGE) scan.obj - @ $(ECHO) "All checks successful" - -$(FLEXLIB) : $(LIBOBJS) - library/Obj $(FLEXLIB)/Create $(LIBOBJS)/Insert - @ if f$search("$(FLEXLIB);-1").nes."" then $(PURGE) $(FLEXLIB) - -# We call it .doc instead of .man, to lessen culture shock. :-} -# If MISC/flex.man is out of date relative to flex.1, there's -# not much we can do about it with the tools readily available. -flex.doc : flex.1 - @ if f$search("$(MISCDIR)flex.man").eqs."" then \ - $(COPY) flex.1 $(MISCDIR)flex.man - $(COPY) $(MISCDIR)flex.man flex.doc - -# -# This is completely VMS-specific... -# - -# Linker options file specifying run-time library(s) to link against; -# choice depends on which C compiler is used, and might be empty. -$(LIBOPT) : $(MAKEFILE) - @ open/Write optfile $(LIBOPT) - @ write optfile "$(LIBS)" - @ close optfile - -# Linker options file putting the version number where the ANALYZE/IMAGE -# command will be able to find and report it; assumes that the first line -# of version.h has the version number enclosed within the first and second -# double quotes on it [as in ``#define FLEX_VERSION "2.5.0"'']. -$(ID_OPT) : version.h - @ version = "# flex ""2.5""" !default, overridden by version.h - @- open/Read hfile version.h - @- read hfile version - @- close/noLog hfile - @ version = f$element(1,"""",version) - @ open/Write optfile $(ID_OPT) - @ write optfile "identification=""flex ''version'""" - @ close optfile - - -# -# This is the only stuff moderately useful from the remainder -# of Makefile.in... -# - -mostlyclean : - @- if f$search("scan.chk").nes."" then $(REMOVE) scan.chk;* - @- if f$search("*.obj;-1").nes."" then $(PURGE) *.obj - @- if f$search("*.exe;-1").nes."" then $(PURGE) *.exe - @- if f$search("*.opt;-1").nes."" then $(PURGE) *.opt - -clean : mostlyclean - @- if f$search("*.obj").nes."" then $(REMOVE) *.obj;* - @- if f$search("parse.h").nes."" then $(REMOVE) parse.h;* - @- if f$search("parse.c").nes."" then $(REMOVE) parse.c;* - @- if f$search("alloca.c").nes."" .and.- - f$search("$(MISCDIR)alloca.c").nes."" then $(REMOVE) alloca.c;* - @- if f$search("$(LIBOPT)").nes."" then $(REMOVE) $(LIBOPT);* - @- if f$search("$(ID_OPT)").nes."" then $(REMOVE) $(ID_OPT);* - -distclean : clean - @- if f$search("$(MARKER)").nes."" then $(REMOVE) $(MARKER);* - @- if f$search("$(FLEX)").nes."" then $(REMOVE) $(FLEX);* - @- if f$search("$(FLEXLIB)").nes."" then $(REMOVE) $(FLEXLIB);* - @- if f$search("flex.doc").nes."" then $(REMOVE) flex.doc;* - @- if f$search("scan.c").nes."" then $(REMOVE) scan.c;* - @- if f$search("vms-code.c").nes."" .and.- - f$search("$(VMSDIR)vms-code.c").nes."" then $(REMOVE) vms-code.c;* - @- if f$search("config.h").nes."" .and.- - f$search("$(VMSDIR)vms-conf.h").nes."" then $(REMOVE) config.h;* -# @- if f$search("descrip.mms").nes."" .and.- -# f$search("$(VMSDIR)descrip.mms").nes."" then $(REMOVE) descrip.mms;* - -realclean : distclean - @- if f$search("skel.c").nes."" then $(REMOVE) skel.c;* - diff --git a/commands/flex-2.5.4/MISC/VMS/mkskel.tpu b/commands/flex-2.5.4/MISC/VMS/mkskel.tpu deleted file mode 100644 index e20a0eb30..000000000 --- a/commands/flex-2.5.4/MISC/VMS/mkskel.tpu +++ /dev/null @@ -1,45 +0,0 @@ -! mkskel.tpu -! usage: -! edit/TPU/noDisplay/noSection/Command=mkskel.tpu flex.skl /Output=skel.c -! -! Create a C source file from the flex skeleton data. Copy the file, -! changing backslash (\) to doubled backslash (\\) and quote (") -! to backslash quote (\"). For each line, insert space+space+quote -! at the beginning and quote+comma at the end. Bracket the updated -! text with several lines of prologue and epilogue. -! - skelfile := CREATE_BUFFER("file", GET_INFO(COMMAND_LINE, "file_name")); - SET(NO_WRITE, skelfile); - target := '"' | '\'; !do this once, outside loops - POSITION(BEGINNING_OF(skelfile)); !start here - rest_of_line := CREATE_RANGE(MARK(NONE), MARK(NONE)); !also outside loops - LOOP - EXITIF MARK(NONE) = END_OF(skelfile); !are we done yet? - COPY_TEXT(' "'); start_pos := MARK(NONE); - POSITION(LINE_END); end_pos := MARK(NONE); - MODIFY_RANGE(rest_of_line, start_pos, end_pos); - LOOP - next_match := SEARCH_QUIETLY(target, FORWARD, EXACT, rest_of_line); - EXITIF next_match = 0; - POSITION(BEGINNING_OF(next_match)); - COPY_TEXT('\'); MOVE_HORIZONTAL(1); !past the matched character - MODIFY_RANGE(rest_of_line, MARK(NONE), end_pos); - ENDLOOP; - POSITION(LINE_END); COPY_TEXT('",'); - MOVE_VERTICAL(1); POSITION(LINE_BEGIN); !go to next line - ENDLOOP; - - POSITION(BEGINNING_OF(skelfile)); !insert five line prologue - COPY_TEXT('/* File created from flex.skl via mkskel.tpu */'); SPLIT_LINE; - SPLIT_LINE; - COPY_TEXT('#include "flexdef.h"'); SPLIT_LINE; - SPLIT_LINE; - COPY_TEXT('const char *skel[] = {'); SPLIT_LINE; - - POSITION(END_OF(skelfile)); !append two line epilogue - COPY_TEXT(' 0'); SPLIT_LINE; - COPY_TEXT('};'); !! SPLIT_LINE; - - WRITE_FILE(skelfile, GET_INFO(COMMAND_LINE, "output_file")); - QUIT -!---- diff --git a/commands/flex-2.5.4/MISC/VMS/vms-code.c b/commands/flex-2.5.4/MISC/VMS/vms-code.c deleted file mode 100644 index 825a6b3bb..000000000 --- a/commands/flex-2.5.4/MISC/VMS/vms-code.c +++ /dev/null @@ -1,152 +0,0 @@ -/* vms-code.c -- additional VMS-specific support code for flex - */ - -#include "flexdef.h" - -static const char *original_arg0; -static const char default_arg0[] = "flex.exe"; - -#define IN_FD 0 -#define OUT_FD 1 -#define ERR_FD 2 - -static char *fix_arg0 PROTO((const char *)); - -/* Command line arguments fixup -- simplify argv[0], and handle `>' - output redirection request; called first thing from main(). */ - -void argv_fixup( iargc, iargv ) -int *iargc; -char ***iargv; -{ - const char *mode[3], *rfm[3], *name[3]; - char *p; - int i, oargc, punct, which, append, alt_rfm; - - /* - * Get original argv[0] supplied by run-time library startup code, - * then replace it with a stripped down one. - */ - original_arg0 = (*iargv)[0]; - (*iargv)[0] = fix_arg0(original_arg0); - - /* - * Check command line arguments for redirection request(s). - * For simplicity, if multiple attempts are made, the last one wins. - */ - name[0] = name[1] = name[2] = 0; - oargc = 1; /* number of args caller will see; count includes argv[0] */ - for (i = 1; i < *iargc; i++) { - p = (*iargv)[i]; - switch (*p) { - case '<': - /* might be "file"; then again, perhaps "<file" */ - punct = (strchr(p, '>') != 0); - if (p[1] == '<') { - if (!punct || p[2] == '<') - flexerror("<<'sentinel' input not supported."); - punct = 0; - } - if (punct) /* the '<' seems to be directory punctuation */ - goto arg; /*GOTO*/ - mode[IN_FD] = "r"; - rfm[IN_FD] = 0; - name[IN_FD] = ++p; - if (!*p && (i + 1) < *iargc) - name[IN_FD] = (*iargv)[++i]; - break; - case '>': - append = (p[1] == '>'); - if (append) ++p; - alt_rfm = (p[1] == '$'); - if (alt_rfm) ++p; - which = (p[1] == '&' ? ERR_FD : OUT_FD); - if (which == ERR_FD) ++p; - mode[which] = append ? "a" : "w"; - rfm[which] = alt_rfm ? "rfm=var" : "rfm=stmlf"; - name[which] = ++p; - if (!*p && (i + 1) < *iargc) - name[which] = (*iargv)[++i]; - break; - case '|': - flexerror("pipe output not supported."); - /*NOTREACHED*/ - break; - default: - arg: /* ordinary option or argument */ - (*iargv)[oargc++] = p; - break; - } - } - /* perform any requested redirection; don't bother with SYS$xxx logicals */ - if (name[IN_FD]) - if (!freopen(name[IN_FD], mode[IN_FD], stdin)) - lerrsf("failed to redirect `stdin' from \"%s\"", name[IN_FD]); - if (name[OUT_FD]) - if (!freopen(name[OUT_FD], mode[OUT_FD], stdout, - rfm[OUT_FD], "rat=cr", "mbc=32", "shr=nil")) - lerrsf("failed to redirect `stdout' to \"%s\"", name[OUT_FD]); - if (name[ERR_FD]) /* likely won't see message if this fails; oh well... */ - if (!freopen(name[ERR_FD], mode[ERR_FD], stderr, - rfm[ERR_FD], "rat=cr")) - lerrsf("failed to redirect `stderr' to \"%s\"", name[ERR_FD]); - /* remove any excess arguments (used up from redirection) */ - while (*iargc > oargc) - (*iargv)[--*iargc] = 0; - /* all done */ - return; -} - -/* Pick out the basename of a full filename, and return a pointer - to a modifiable copy of it. */ - -static char *fix_arg0( arg0 ) -const char *arg0; -{ - char *p, *new_arg0; - - if (arg0) { - /* strip off the path */ - if ((p = strrchr(arg0, ':')) != 0) /* device punctuation */ - arg0 = p + 1; - if ((p = strrchr(arg0, ']')) != 0) /* directory punctuation */ - arg0 = p + 1; - if ((p = strrchr(arg0, '>')) != 0) /* alternate dir punct */ - arg0 = p + 1; - } - if (!arg0 || !*arg0) - arg0 = default_arg0; - /* should now have "something.exe;#"; make a modifiable copy */ - new_arg0 = copy_string(arg0); - - /* strip off ".exe" and/or ";#" (version number), - unless it ended up as the whole name */ - if ((p = strchr(new_arg0, '.')) != 0 && (p > new_arg0) - && (p[1] == 'e' || p[1] == 'E') - && (p[2] == 'x' || p[2] == 'X') - && (p[3] == 'e' || p[3] == 'E') - && (p[4] == ';' || p[4] == '.' || p[4] == '\0')) - *p = '\0'; - else if ((p = strchr(new_arg0, ';')) != 0 && (p > new_arg0)) - *p = '\0'; - - return new_arg0; -} - - -#include -#include - -#ifdef exit -#undef exit -extern void exit PROTO((int)); /* ended up prototyping vms_exit */ -#endif - -/* Convert zero to VMS success and non-zero to VMS failure. The latter - does not bother trying to distinguish between various failure reasons. */ - -void vms_exit( status ) -int status; -{ - exit( status == 0 ? SS$_NORMAL : (SS$_ABORT | STS$M_INHIB_MSG) ); -} diff --git a/commands/flex-2.5.4/MISC/VMS/vms-conf.h b/commands/flex-2.5.4/MISC/VMS/vms-conf.h deleted file mode 100644 index 65aa477ec..000000000 --- a/commands/flex-2.5.4/MISC/VMS/vms-conf.h +++ /dev/null @@ -1,32 +0,0 @@ -/* config.h manually constructed for VMS */ - -/* Define to empty if the keyword does not work. */ -#undef const - -/* Define to `unsigned' if doesn't define. */ -#undef size_t - -/* Define if you have the ANSI C header files. */ -#define STDC_HEADERS - -/* Define if you have the header file. */ -#undef HAVE_MALLOC_H - -/* Define if you have the header file. */ -#define HAVE_STRING_H - -/* Define if you have the header file. */ -#ifndef __GNUC__ -#undef HAVE_SYS_TYPES_H -#else -#define HAVE_SYS_TYPES_H -#endif - -/* Define if you have and it should be used (not on Ultrix). */ -#undef HAVE_ALLOCA_H - -/* Extra platform-specific command line handling. */ -#define NEED_ARGV_FIXUP - -/* Override default exit behavior. */ -#define exit vms_exit diff --git a/commands/flex-2.5.4/MISC/alloca.c b/commands/flex-2.5.4/MISC/alloca.c deleted file mode 100644 index bd4932aa4..000000000 --- a/commands/flex-2.5.4/MISC/alloca.c +++ /dev/null @@ -1,484 +0,0 @@ -/* alloca.c -- allocate automatically reclaimed memory - (Mostly) portable public-domain implementation -- D A Gwyn - - This implementation of the PWB library alloca function, - which is used to allocate space off the run-time stack so - that it is automatically reclaimed upon procedure exit, - was inspired by discussions with J. Q. Johnson of Cornell. - J.Otto Tennant contributed the Cray support. - - There are some preprocessor constants that can - be defined when compiling for your specific system, for - improved efficiency; however, the defaults should be okay. - - The general concept of this implementation is to keep - track of all alloca-allocated blocks, and reclaim any - that are found to be deeper in the stack than the current - invocation. This heuristic does not reclaim storage as - soon as it becomes invalid, but it will do so eventually. - - As a special case, alloca(0) reclaims storage without - allocating any. It is a good idea to use alloca(0) in - your main control loop, etc. to force garbage collection. */ - -#ifdef HAVE_CONFIG_H -#if defined (emacs) || defined (CONFIG_BROKETS) -#include -#else -#include "config.h" -#endif -#endif - -/* If compiling with GCC 2, this file's not needed. */ -#if !defined (__GNUC__) || __GNUC__ < 2 - -/* If someone has defined alloca as a macro, - there must be some other way alloca is supposed to work. */ -#ifndef alloca - -#ifdef emacs -#ifdef static -/* actually, only want this if static is defined as "" - -- this is for usg, in which emacs must undefine static - in order to make unexec workable - */ -#ifndef STACK_DIRECTION -you -lose --- must know STACK_DIRECTION at compile-time -#endif /* STACK_DIRECTION undefined */ -#endif /* static */ -#endif /* emacs */ - -/* If your stack is a linked list of frames, you have to - provide an "address metric" ADDRESS_FUNCTION macro. */ - -#if defined (CRAY) && defined (CRAY_STACKSEG_END) -long i00afunc (); -#define ADDRESS_FUNCTION(arg) (char *) i00afunc (&(arg)) -#else -#define ADDRESS_FUNCTION(arg) &(arg) -#endif - -#if __STDC__ -typedef void *pointer; -#else -typedef char *pointer; -#endif - -#define NULL 0 - -/* Different portions of Emacs need to call different versions of - malloc. The Emacs executable needs alloca to call xmalloc, because - ordinary malloc isn't protected from input signals. On the other - hand, the utilities in lib-src need alloca to call malloc; some of - them are very simple, and don't have an xmalloc routine. - - Non-Emacs programs expect this to call use xmalloc. - - Callers below should use malloc. */ - -#ifndef emacs -#define malloc xmalloc -#endif -extern pointer malloc (); - -/* Define STACK_DIRECTION if you know the direction of stack - growth for your system; otherwise it will be automatically - deduced at run-time. - - STACK_DIRECTION > 0 => grows toward higher addresses - STACK_DIRECTION < 0 => grows toward lower addresses - STACK_DIRECTION = 0 => direction of growth unknown */ - -#ifndef STACK_DIRECTION -#define STACK_DIRECTION 0 /* Direction unknown. */ -#endif - -#if STACK_DIRECTION != 0 - -#define STACK_DIR STACK_DIRECTION /* Known at compile-time. */ - -#else /* STACK_DIRECTION == 0; need run-time code. */ - -static int stack_dir; /* 1 or -1 once known. */ -#define STACK_DIR stack_dir - -static void -find_stack_direction () -{ - static char *addr = NULL; /* Address of first `dummy', once known. */ - auto char dummy; /* To get stack address. */ - - if (addr == NULL) - { /* Initial entry. */ - addr = ADDRESS_FUNCTION (dummy); - - find_stack_direction (); /* Recurse once. */ - } - else - { - /* Second entry. */ - if (ADDRESS_FUNCTION (dummy) > addr) - stack_dir = 1; /* Stack grew upward. */ - else - stack_dir = -1; /* Stack grew downward. */ - } -} - -#endif /* STACK_DIRECTION == 0 */ - -/* An "alloca header" is used to: - (a) chain together all alloca'ed blocks; - (b) keep track of stack depth. - - It is very important that sizeof(header) agree with malloc - alignment chunk size. The following default should work okay. */ - -#ifndef ALIGN_SIZE -#define ALIGN_SIZE sizeof(double) -#endif - -typedef union hdr -{ - char align[ALIGN_SIZE]; /* To force sizeof(header). */ - struct - { - union hdr *next; /* For chaining headers. */ - char *deep; /* For stack depth measure. */ - } h; -} header; - -static header *last_alloca_header = NULL; /* -> last alloca header. */ - -/* Return a pointer to at least SIZE bytes of storage, - which will be automatically reclaimed upon exit from - the procedure that called alloca. Originally, this space - was supposed to be taken from the current stack frame of the - caller, but that method cannot be made to work for some - implementations of C, for example under Gould's UTX/32. */ - -pointer -alloca (size) - unsigned size; -{ - auto char probe; /* Probes stack depth: */ - register char *depth = ADDRESS_FUNCTION (probe); - -#if STACK_DIRECTION == 0 - if (STACK_DIR == 0) /* Unknown growth direction. */ - find_stack_direction (); -#endif - - /* Reclaim garbage, defined as all alloca'd storage that - was allocated from deeper in the stack than currently. */ - - { - register header *hp; /* Traverses linked list. */ - - for (hp = last_alloca_header; hp != NULL;) - if ((STACK_DIR > 0 && hp->h.deep > depth) - || (STACK_DIR < 0 && hp->h.deep < depth)) - { - register header *np = hp->h.next; - - free ((pointer) hp); /* Collect garbage. */ - - hp = np; /* -> next header. */ - } - else - break; /* Rest are not deeper. */ - - last_alloca_header = hp; /* -> last valid storage. */ - } - - if (size == 0) - return NULL; /* No allocation required. */ - - /* Allocate combined header + user data storage. */ - - { - register pointer new = malloc (sizeof (header) + size); - /* Address of header. */ - - ((header *) new)->h.next = last_alloca_header; - ((header *) new)->h.deep = depth; - - last_alloca_header = (header *) new; - - /* User storage begins just after header. */ - - return (pointer) ((char *) new + sizeof (header)); - } -} - -#if defined (CRAY) && defined (CRAY_STACKSEG_END) - -#ifdef DEBUG_I00AFUNC -#include -#endif - -#ifndef CRAY_STACK -#define CRAY_STACK -#ifndef CRAY2 -/* Stack structures for CRAY-1, CRAY X-MP, and CRAY Y-MP */ -struct stack_control_header - { - long shgrow:32; /* Number of times stack has grown. */ - long shaseg:32; /* Size of increments to stack. */ - long shhwm:32; /* High water mark of stack. */ - long shsize:32; /* Current size of stack (all segments). */ - }; - -/* The stack segment linkage control information occurs at - the high-address end of a stack segment. (The stack - grows from low addresses to high addresses.) The initial - part of the stack segment linkage control information is - 0200 (octal) words. This provides for register storage - for the routine which overflows the stack. */ - -struct stack_segment_linkage - { - long ss[0200]; /* 0200 overflow words. */ - long sssize:32; /* Number of words in this segment. */ - long ssbase:32; /* Offset to stack base. */ - long:32; - long sspseg:32; /* Offset to linkage control of previous - segment of stack. */ - long:32; - long sstcpt:32; /* Pointer to task common address block. */ - long sscsnm; /* Private control structure number for - microtasking. */ - long ssusr1; /* Reserved for user. */ - long ssusr2; /* Reserved for user. */ - long sstpid; /* Process ID for pid based multi-tasking. */ - long ssgvup; /* Pointer to multitasking thread giveup. */ - long sscray[7]; /* Reserved for Cray Research. */ - long ssa0; - long ssa1; - long ssa2; - long ssa3; - long ssa4; - long ssa5; - long ssa6; - long ssa7; - long sss0; - long sss1; - long sss2; - long sss3; - long sss4; - long sss5; - long sss6; - long sss7; - }; - -#else /* CRAY2 */ -/* The following structure defines the vector of words - returned by the STKSTAT library routine. */ -struct stk_stat - { - long now; /* Current total stack size. */ - long maxc; /* Amount of contiguous space which would - be required to satisfy the maximum - stack demand to date. */ - long high_water; /* Stack high-water mark. */ - long overflows; /* Number of stack overflow ($STKOFEN) calls. */ - long hits; /* Number of internal buffer hits. */ - long extends; /* Number of block extensions. */ - long stko_mallocs; /* Block allocations by $STKOFEN. */ - long underflows; /* Number of stack underflow calls ($STKRETN). */ - long stko_free; /* Number of deallocations by $STKRETN. */ - long stkm_free; /* Number of deallocations by $STKMRET. */ - long segments; /* Current number of stack segments. */ - long maxs; /* Maximum number of stack segments so far. */ - long pad_size; /* Stack pad size. */ - long current_address; /* Current stack segment address. */ - long current_size; /* Current stack segment size. This - number is actually corrupted by STKSTAT to - include the fifteen word trailer area. */ - long initial_address; /* Address of initial segment. */ - long initial_size; /* Size of initial segment. */ - }; - -/* The following structure describes the data structure which trails - any stack segment. I think that the description in 'asdef' is - out of date. I only describe the parts that I am sure about. */ - -struct stk_trailer - { - long this_address; /* Address of this block. */ - long this_size; /* Size of this block (does not include - this trailer). */ - long unknown2; - long unknown3; - long link; /* Address of trailer block of previous - segment. */ - long unknown5; - long unknown6; - long unknown7; - long unknown8; - long unknown9; - long unknown10; - long unknown11; - long unknown12; - long unknown13; - long unknown14; - }; - -#endif /* CRAY2 */ -#endif /* not CRAY_STACK */ - -#ifdef CRAY2 -/* Determine a "stack measure" for an arbitrary ADDRESS. - I doubt that "lint" will like this much. */ - -static long -i00afunc (long *address) -{ - struct stk_stat status; - struct stk_trailer *trailer; - long *block, size; - long result = 0; - - /* We want to iterate through all of the segments. The first - step is to get the stack status structure. We could do this - more quickly and more directly, perhaps, by referencing the - $LM00 common block, but I know that this works. */ - - STKSTAT (&status); - - /* Set up the iteration. */ - - trailer = (struct stk_trailer *) (status.current_address - + status.current_size - - 15); - - /* There must be at least one stack segment. Therefore it is - a fatal error if "trailer" is null. */ - - if (trailer == 0) - abort (); - - /* Discard segments that do not contain our argument address. */ - - while (trailer != 0) - { - block = (long *) trailer->this_address; - size = trailer->this_size; - if (block == 0 || size == 0) - abort (); - trailer = (struct stk_trailer *) trailer->link; - if ((block <= address) && (address < (block + size))) - break; - } - - /* Set the result to the offset in this segment and add the sizes - of all predecessor segments. */ - - result = address - block; - - if (trailer == 0) - { - return result; - } - - do - { - if (trailer->this_size <= 0) - abort (); - result += trailer->this_size; - trailer = (struct stk_trailer *) trailer->link; - } - while (trailer != 0); - - /* We are done. Note that if you present a bogus address (one - not in any segment), you will get a different number back, formed - from subtracting the address of the first block. This is probably - not what you want. */ - - return (result); -} - -#else /* not CRAY2 */ -/* Stack address function for a CRAY-1, CRAY X-MP, or CRAY Y-MP. - Determine the number of the cell within the stack, - given the address of the cell. The purpose of this - routine is to linearize, in some sense, stack addresses - for alloca. */ - -static long -i00afunc (long address) -{ - long stkl = 0; - - long size, pseg, this_segment, stack; - long result = 0; - - struct stack_segment_linkage *ssptr; - - /* Register B67 contains the address of the end of the - current stack segment. If you (as a subprogram) store - your registers on the stack and find that you are past - the contents of B67, you have overflowed the segment. - - B67 also points to the stack segment linkage control - area, which is what we are really interested in. */ - - stkl = CRAY_STACKSEG_END (); - ssptr = (struct stack_segment_linkage *) stkl; - - /* If one subtracts 'size' from the end of the segment, - one has the address of the first word of the segment. - - If this is not the first segment, 'pseg' will be - nonzero. */ - - pseg = ssptr->sspseg; - size = ssptr->sssize; - - this_segment = stkl - size; - - /* It is possible that calling this routine itself caused - a stack overflow. Discard stack segments which do not - contain the target address. */ - - while (!(this_segment <= address && address <= stkl)) - { -#ifdef DEBUG_I00AFUNC - fprintf (stderr, "%011o %011o %011o\n", this_segment, address, stkl); -#endif - if (pseg == 0) - break; - stkl = stkl - pseg; - ssptr = (struct stack_segment_linkage *) stkl; - size = ssptr->sssize; - pseg = ssptr->sspseg; - this_segment = stkl - size; - } - - result = address - this_segment; - - /* If you subtract pseg from the current end of the stack, - you get the address of the previous stack segment's end. - This seems a little convoluted to me, but I'll bet you save - a cycle somewhere. */ - - while (pseg != 0) - { -#ifdef DEBUG_I00AFUNC - fprintf (stderr, "%011o %011o\n", pseg, size); -#endif - stkl = stkl - pseg; - ssptr = (struct stack_segment_linkage *) stkl; - size = ssptr->sssize; - pseg = ssptr->sspseg; - result += size; - } - return (result); -} - -#endif /* not CRAY2 */ -#endif /* CRAY */ - -#endif /* no alloca */ -#endif /* not GCC version 2 */ diff --git a/commands/flex-2.5.4/MISC/debflex.awk b/commands/flex-2.5.4/MISC/debflex.awk deleted file mode 100644 index b1eda49c4..000000000 --- a/commands/flex-2.5.4/MISC/debflex.awk +++ /dev/null @@ -1,119 +0,0 @@ -# Clarify the flex debug trace by substituting first line of each rule. -# Francois Pinard , July 1990. -# -# Rewritten to process correctly \n's in scanner input. -# BEGIN section modified to correct a collection of rules. -# Michal Jaegermann , December 1993 -# -# Sample usage: -# flex -d PROGRAM.l -# gcc -o PROGRAM PROGRAM.c -lfl -# PROGRAM 2>&1 | gawk -f debflex.awk PROGRAM.l -# -# (VP's note: this script presently does not work with either "old" or -# "new" awk; fixes so it does will be welcome) - -BEGIN { - # Insure proper usage. - - if (ARGC != 2) { - print "usage: gawk -f debflex.awk FLEX_SOURCE -#include - -main() -{ - register int c, cc = 0, wc = 0, lc = 0; - FILE *f = stdin; - - while ((c = getc(f)) != EOF) { - ++cc; - if (isgraph(c)) { - ++wc; - do { - c = getc(f); - if (c == EOF) - goto done; - ++cc; - } while (isgraph(c)); - } - if (c == '\n') - ++lc; - } -done: printf( "%8d%8d%8d\n", lc, wc, cc ); -} diff --git a/commands/flex-2.5.4/MISC/fastwc/wc1.l b/commands/flex-2.5.4/MISC/fastwc/wc1.l deleted file mode 100644 index d6696bcde..000000000 --- a/commands/flex-2.5.4/MISC/fastwc/wc1.l +++ /dev/null @@ -1,18 +0,0 @@ -/* First cut at a flex-based "wc" tool. */ - -ws [ \t] -nonws [^ \t\n] - -%% - int cc = 0, wc = 0, lc = 0; - -{nonws}+ cc += yyleng; ++wc; - -{ws}+ cc += yyleng; - -\n ++lc; ++cc; - -<> { - printf( "%8d %8d %8d\n", lc, wc, cc ); - yyterminate(); - } diff --git a/commands/flex-2.5.4/MISC/fastwc/wc2.l b/commands/flex-2.5.4/MISC/fastwc/wc2.l deleted file mode 100644 index bd63cd490..000000000 --- a/commands/flex-2.5.4/MISC/fastwc/wc2.l +++ /dev/null @@ -1,20 +0,0 @@ -/* Somewhat faster "wc" tool: match more text with each rule */ - -ws [ \t] -nonws [^ \t\n] -word {ws}*{nonws}+ - -%% - int cc = 0, wc = 0, lc = 0; - -{word}{ws}* cc += yyleng; ++wc; -{word}{ws}*\n cc += yyleng; ++wc; ++lc; - -{ws}+ cc += yyleng; - -\n+ cc += yyleng; lc += yyleng; - -<> { - printf( "%8d %8d %8d\n", lc, wc, cc ); - yyterminate(); - } diff --git a/commands/flex-2.5.4/MISC/fastwc/wc3.l b/commands/flex-2.5.4/MISC/fastwc/wc3.l deleted file mode 100644 index 7c5f2e271..000000000 --- a/commands/flex-2.5.4/MISC/fastwc/wc3.l +++ /dev/null @@ -1,24 +0,0 @@ -/* Somewhat faster still: potentially match a lot of text with each rule */ - -ws [ \t] -nonws [^ \t\n] -word {ws}*{nonws}+ -words {word}{ws}+ - -%% - int cc = 0, wc = 0, lc = 0; - -{word}{ws}* cc += yyleng; ++wc; -{word}{ws}*\n cc += yyleng; ++wc; ++lc; -{words}{word}{ws}* cc += yyleng; wc += 2; -{words}{2}{word}{ws}* cc += yyleng; wc += 3; -{words}{3}{word}{ws}* cc += yyleng; wc += 4; - -{ws}+ cc += yyleng; - -\n+ cc += yyleng; lc += yyleng; - -<> { - printf( "%8d %8d %8d\n", lc, wc, cc ); - yyterminate(); - } diff --git a/commands/flex-2.5.4/MISC/fastwc/wc4.l b/commands/flex-2.5.4/MISC/fastwc/wc4.l deleted file mode 100644 index cbe56f6e1..000000000 --- a/commands/flex-2.5.4/MISC/fastwc/wc4.l +++ /dev/null @@ -1,27 +0,0 @@ -/* Fastest version of wc: add rules to pick up newlines, too */ - -ws [ \t] -nonws [^ \t\n] -word {ws}*{nonws}+ -words {word}{ws}+ - -%% - int cc = 0, wc = 0, lc = 0; - -{word}{ws}* ++wc; cc += yyleng; -{word}{ws}*\n ++wc; cc += yyleng; ++lc; -{words}{word}{ws}* wc += 2; cc += yyleng; -{words}{word}{ws}*\n wc += 2; cc += yyleng; ++lc; -{words}{2}{word}{ws}* wc += 3; cc += yyleng; -{words}{2}{word}{ws}*\n wc += 3; cc += yyleng; ++lc; -{words}{3}{word}{ws}* wc += 4; cc += yyleng; -{words}{3}{word}{ws}*\n wc += 4; cc += yyleng; ++lc; - -{ws}+ cc += yyleng; - -\n+ cc += yyleng; lc += yyleng; - -<> { - printf( "%8d %8d %8d\n", lc, wc, cc ); - yyterminate(); - } diff --git a/commands/flex-2.5.4/MISC/fastwc/wc5.l b/commands/flex-2.5.4/MISC/fastwc/wc5.l deleted file mode 100644 index 8fe17b622..000000000 --- a/commands/flex-2.5.4/MISC/fastwc/wc5.l +++ /dev/null @@ -1,24 +0,0 @@ -/* Oops; slight change from wc3.l introduces backtracking */ - -ws [ \t] -nonws [^ \t\n] -word {ws}*{nonws}+ -words {word}{ws}+ - -%% - int cc = 0, wc = 0, lc = 0; - -{word}{ws}* cc += yyleng; ++wc; -{word}{ws}*\n cc += yyleng; ++wc; ++lc; -{words}{word} cc += yyleng; wc += 2; /* oops */ -{words}{2}{word}{ws}* cc += yyleng; wc += 3; -{words}{3}{word}{ws}* cc += yyleng; wc += 4; - -{ws}+ cc += yyleng; - -\n+ cc += yyleng; lc += yyleng; - -<> { - printf( "%8d %8d %8d\n", lc, wc, cc ); - yyterminate(); - } diff --git a/commands/flex-2.5.4/MISC/flex.man b/commands/flex-2.5.4/MISC/flex.man deleted file mode 100644 index d41f5ba5b..000000000 --- a/commands/flex-2.5.4/MISC/flex.man +++ /dev/null @@ -1,3696 +0,0 @@ - - - -FLEX(1) USER COMMANDS FLEX(1) - - - -NAME - flex - fast lexical analyzer generator - -SYNOPSIS - flex [-bcdfhilnpstvwBFILTV78+? -C[aefFmr] -ooutput -Pprefix - -Sskeleton] [--help --version] [filename ...] - -OVERVIEW - This manual describes flex, a tool for generating programs - that perform pattern-matching on text. The manual includes - both tutorial and reference sections: - - Description - a brief overview of the tool - - Some Simple Examples - - Format Of The Input File - - Patterns - the extended regular expressions used by flex - - How The Input Is Matched - the rules for determining what has been matched - - Actions - how to specify what to do when a pattern is matched - - The Generated Scanner - details regarding the scanner that flex produces; - how to control the input source - - Start Conditions - introducing context into your scanners, and - managing "mini-scanners" - - Multiple Input Buffers - how to manipulate multiple input sources; how to - scan from strings instead of files - - End-of-file Rules - special rules for matching the end of the input - - Miscellaneous Macros - a summary of macros available to the actions - - Values Available To The User - a summary of values available to the actions - - Interfacing With Yacc - connecting flex scanners together with yacc parsers - - - - -Version 2.5 Last change: April 1995 1 - - - - - - -FLEX(1) USER COMMANDS FLEX(1) - - - - Options - flex command-line options, and the "%option" - directive - - Performance Considerations - how to make your scanner go as fast as possible - - Generating C++ Scanners - the (experimental) facility for generating C++ - scanner classes - - Incompatibilities With Lex And POSIX - how flex differs from AT&T lex and the POSIX lex - standard - - Diagnostics - those error messages produced by flex (or scanners - it generates) whose meanings might not be apparent - - Files - files used by flex - - Deficiencies / Bugs - known problems with flex - - See Also - other documentation, related tools - - Author - includes contact information - - -DESCRIPTION - flex is a tool for generating scanners: programs which - recognized lexical patterns in text. flex reads the given - input files, or its standard input if no file names are - given, for a description of a scanner to generate. The - description is in the form of pairs of regular expressions - and C code, called rules. flex generates as output a C - source file, lex.yy.c, which defines a routine yylex(). This - file is compiled and linked with the -lfl library to produce - an executable. When the executable is run, it analyzes its - input for occurrences of the regular expressions. Whenever - it finds one, it executes the corresponding C code. - -SOME SIMPLE EXAMPLES - First some simple examples to get the flavor of how one uses - flex. The following flex input specifies a scanner which - whenever it encounters the string "username" will replace it - with the user's login name: - - %% - - - -Version 2.5 Last change: April 1995 2 - - - - - - -FLEX(1) USER COMMANDS FLEX(1) - - - - username printf( "%s", getlogin() ); - - By default, any text not matched by a flex scanner is copied - to the output, so the net effect of this scanner is to copy - its input file to its output with each occurrence of "user- - name" expanded. In this input, there is just one rule. - "username" is the pattern and the "printf" is the action. - The "%%" marks the beginning of the rules. - - Here's another simple example: - - int num_lines = 0, num_chars = 0; - - %% - \n ++num_lines; ++num_chars; - . ++num_chars; - - %% - main() - { - yylex(); - printf( "# of lines = %d, # of chars = %d\n", - num_lines, num_chars ); - } - - This scanner counts the number of characters and the number - of lines in its input (it produces no output other than the - final report on the counts). The first line declares two - globals, "num_lines" and "num_chars", which are accessible - both inside yylex() and in the main() routine declared after - the second "%%". There are two rules, one which matches a - newline ("\n") and increments both the line count and the - character count, and one which matches any character other - than a newline (indicated by the "." regular expression). - - A somewhat more complicated example: - - /* scanner for a toy Pascal-like language */ - - %{ - /* need this for the call to atof() below */ - #include - %} - - DIGIT [0-9] - ID [a-z][a-z0-9]* - - %% - - {DIGIT}+ { - printf( "An integer: %s (%d)\n", yytext, - atoi( yytext ) ); - - - -Version 2.5 Last change: April 1995 3 - - - - - - -FLEX(1) USER COMMANDS FLEX(1) - - - - } - - {DIGIT}+"."{DIGIT}* { - printf( "A float: %s (%g)\n", yytext, - atof( yytext ) ); - } - - if|then|begin|end|procedure|function { - printf( "A keyword: %s\n", yytext ); - } - - {ID} printf( "An identifier: %s\n", yytext ); - - "+"|"-"|"*"|"/" printf( "An operator: %s\n", yytext ); - - "{"[^}\n]*"}" /* eat up one-line comments */ - - [ \t\n]+ /* eat up whitespace */ - - . printf( "Unrecognized character: %s\n", yytext ); - - %% - - main( argc, argv ) - int argc; - char **argv; - { - ++argv, --argc; /* skip over program name */ - if ( argc > 0 ) - yyin = fopen( argv[0], "r" ); - else - yyin = stdin; - - yylex(); - } - - This is the beginnings of a simple scanner for a language - like Pascal. It identifies different types of tokens and - reports on what it has seen. - - The details of this example will be explained in the follow- - ing sections. - -FORMAT OF THE INPUT FILE - The flex input file consists of three sections, separated by - a line with just %% in it: - - definitions - %% - rules - %% - user code - - - -Version 2.5 Last change: April 1995 4 - - - - - - -FLEX(1) USER COMMANDS FLEX(1) - - - - The definitions section contains declarations of simple name - definitions to simplify the scanner specification, and - declarations of start conditions, which are explained in a - later section. - - Name definitions have the form: - - name definition - - The "name" is a word beginning with a letter or an under- - score ('_') followed by zero or more letters, digits, '_', - or '-' (dash). The definition is taken to begin at the - first non-white-space character following the name and con- - tinuing to the end of the line. The definition can subse- - quently be referred to using "{name}", which will expand to - "(definition)". For example, - - DIGIT [0-9] - ID [a-z][a-z0-9]* - - defines "DIGIT" to be a regular expression which matches a - single digit, and "ID" to be a regular expression which - matches a letter followed by zero-or-more letters-or-digits. - A subsequent reference to - - {DIGIT}+"."{DIGIT}* - - is identical to - - ([0-9])+"."([0-9])* - - and matches one-or-more digits followed by a '.' followed by - zero-or-more digits. - - The rules section of the flex input contains a series of - rules of the form: - - pattern action - - where the pattern must be unindented and the action must - begin on the same line. - - See below for a further description of patterns and actions. - - Finally, the user code section is simply copied to lex.yy.c - verbatim. It is used for companion routines which call or - are called by the scanner. The presence of this section is - optional; if it is missing, the second %% in the input file - may be skipped, too. - - In the definitions and rules sections, any indented text or - text enclosed in %{ and %} is copied verbatim to the output - - - -Version 2.5 Last change: April 1995 5 - - - - - - -FLEX(1) USER COMMANDS FLEX(1) - - - - (with the %{}'s removed). The %{}'s must appear unindented - on lines by themselves. - - In the rules section, any indented or %{} text appearing - before the first rule may be used to declare variables which - are local to the scanning routine and (after the declara- - tions) code which is to be executed whenever the scanning - routine is entered. Other indented or %{} text in the rule - section is still copied to the output, but its meaning is - not well-defined and it may well cause compile-time errors - (this feature is present for POSIX compliance; see below for - other such features). - - In the definitions section (but not in the rules section), - an unindented comment (i.e., a line beginning with "/*") is - also copied verbatim to the output up to the next "*/". - -PATTERNS - The patterns in the input are written using an extended set - of regular expressions. These are: - - x match the character 'x' - . any character (byte) except newline - [xyz] a "character class"; in this case, the pattern - matches either an 'x', a 'y', or a 'z' - [abj-oZ] a "character class" with a range in it; matches - an 'a', a 'b', any letter from 'j' through 'o', - or a 'Z' - [^A-Z] a "negated character class", i.e., any character - but those in the class. In this case, any - character EXCEPT an uppercase letter. - [^A-Z\n] any character EXCEPT an uppercase letter or - a newline - r* zero or more r's, where r is any regular expression - r+ one or more r's - r? zero or one r's (that is, "an optional r") - r{2,5} anywhere from two to five r's - r{2,} two or more r's - r{4} exactly 4 r's - {name} the expansion of the "name" definition - (see above) - "[xyz]\"foo" - the literal string: [xyz]"foo - \X if X is an 'a', 'b', 'f', 'n', 'r', 't', or 'v', - then the ANSI-C interpretation of \x. - Otherwise, a literal 'X' (used to escape - operators such as '*') - \0 a NUL character (ASCII code 0) - \123 the character with octal value 123 - \x2a the character with hexadecimal value 2a - (r) match an r; parentheses are used to override - precedence (see below) - - - -Version 2.5 Last change: April 1995 6 - - - - - - -FLEX(1) USER COMMANDS FLEX(1) - - - - rs the regular expression r followed by the - regular expression s; called "concatenation" - - - r|s either an r or an s - - - r/s an r but only if it is followed by an s. The - text matched by s is included when determining - whether this rule is the "longest match", - but is then returned to the input before - the action is executed. So the action only - sees the text matched by r. This type - of pattern is called trailing context". - (There are some combinations of r/s that flex - cannot match correctly; see notes in the - Deficiencies / Bugs section below regarding - "dangerous trailing context".) - ^r an r, but only at the beginning of a line (i.e., - which just starting to scan, or right after a - newline has been scanned). - r$ an r, but only at the end of a line (i.e., just - before a newline). Equivalent to "r/\n". - - Note that flex's notion of "newline" is exactly - whatever the C compiler used to compile flex - interprets '\n' as; in particular, on some DOS - systems you must either filter out \r's in the - input yourself, or explicitly use r/\r\n for "r$". - - - r an r, but only in start condition s (see - below for discussion of start conditions) - r - same, but in any of start conditions s1, - s2, or s3 - <*>r an r in any start condition, even an exclusive one. - - - <> an end-of-file - <> - an end-of-file when in start condition s1 or s2 - - Note that inside of a character class, all regular expres- - sion operators lose their special meaning except escape - ('\') and the character class operators, '-', ']', and, at - the beginning of the class, '^'. - - The regular expressions listed above are grouped according - to precedence, from highest precedence at the top to lowest - at the bottom. Those grouped together have equal pre- - cedence. For example, - - - -Version 2.5 Last change: April 1995 7 - - - - - - -FLEX(1) USER COMMANDS FLEX(1) - - - - foo|bar* - - is the same as - - (foo)|(ba(r*)) - - since the '*' operator has higher precedence than concatena- - tion, and concatenation higher than alternation ('|'). This - pattern therefore matches either the string "foo" or the - string "ba" followed by zero-or-more r's. To match "foo" or - zero-or-more "bar"'s, use: - - foo|(bar)* - - and to match zero-or-more "foo"'s-or-"bar"'s: - - (foo|bar)* - - - In addition to characters and ranges of characters, charac- - ter classes can also contain character class expressions. - These are expressions enclosed inside [: and :] delimiters - (which themselves must appear between the '[' and ']' of the - character class; other elements may occur inside the charac- - ter class, too). The valid expressions are: - - [:alnum:] [:alpha:] [:blank:] - [:cntrl:] [:digit:] [:graph:] - [:lower:] [:print:] [:punct:] - [:space:] [:upper:] [:xdigit:] - - These expressions all designate a set of characters - equivalent to the corresponding standard C isXXX function. - For example, [:alnum:] designates those characters for which - isalnum() returns true - i.e., any alphabetic or numeric. - Some systems don't provide isblank(), so flex defines - [:blank:] as a blank or a tab. - - For example, the following character classes are all - equivalent: - - [[:alnum:]] - [[:alpha:][:digit:] - [[:alpha:]0-9] - [a-zA-Z0-9] - - If your scanner is case-insensitive (the -i flag), then - [:upper:] and [:lower:] are equivalent to [:alpha:]. - - Some notes on patterns: - - - A negated character class such as the example "[^A-Z]" - - - -Version 2.5 Last change: April 1995 8 - - - - - - -FLEX(1) USER COMMANDS FLEX(1) - - - - above will match a newline unless "\n" (or an - equivalent escape sequence) is one of the characters - explicitly present in the negated character class - (e.g., "[^A-Z\n]"). This is unlike how many other reg- - ular expression tools treat negated character classes, - but unfortunately the inconsistency is historically - entrenched. Matching newlines means that a pattern - like [^"]* can match the entire input unless there's - another quote in the input. - - - A rule can have at most one instance of trailing con- - text (the '/' operator or the '$' operator). The start - condition, '^', and "<>" patterns can only occur - at the beginning of a pattern, and, as well as with '/' - and '$', cannot be grouped inside parentheses. A '^' - which does not occur at the beginning of a rule or a - '$' which does not occur at the end of a rule loses its - special properties and is treated as a normal charac- - ter. - - The following are illegal: - - foo/bar$ - foobar - - Note that the first of these, can be written - "foo/bar\n". - - The following will result in '$' or '^' being treated - as a normal character: - - foo|(bar$) - foo|^bar - - If what's wanted is a "foo" or a bar-followed-by-a- - newline, the following could be used (the special '|' - action is explained below): - - foo | - bar$ /* action goes here */ - - A similar trick will work for matching a foo or a bar- - at-the-beginning-of-a-line. - -HOW THE INPUT IS MATCHED - When the generated scanner is run, it analyzes its input - looking for strings which match any of its patterns. If it - finds more than one match, it takes the one matching the - most text (for trailing context rules, this includes the - length of the trailing part, even though it will then be - returned to the input). If it finds two or more matches of - the same length, the rule listed first in the flex input - - - -Version 2.5 Last change: April 1995 9 - - - - - - -FLEX(1) USER COMMANDS FLEX(1) - - - - file is chosen. - - Once the match is determined, the text corresponding to the - match (called the token) is made available in the global - character pointer yytext, and its length in the global - integer yyleng. The action corresponding to the matched pat- - tern is then executed (a more detailed description of - actions follows), and then the remaining input is scanned - for another match. - - If no match is found, then the default rule is executed: the - next character in the input is considered matched and copied - to the standard output. Thus, the simplest legal flex input - is: - - %% - - which generates a scanner that simply copies its input (one - character at a time) to its output. - - Note that yytext can be defined in two different ways: - either as a character pointer or as a character array. You - can control which definition flex uses by including one of - the special directives %pointer or %array in the first - (definitions) section of your flex input. The default is - %pointer, unless you use the -l lex compatibility option, in - which case yytext will be an array. The advantage of using - %pointer is substantially faster scanning and no buffer - overflow when matching very large tokens (unless you run out - of dynamic memory). The disadvantage is that you are res- - tricted in how your actions can modify yytext (see the next - section), and calls to the unput() function destroys the - present contents of yytext, which can be a considerable - porting headache when moving between different lex versions. - - The advantage of %array is that you can then modify yytext - to your heart's content, and calls to unput() do not destroy - yytext (see below). Furthermore, existing lex programs - sometimes access yytext externally using declarations of the - form: - extern char yytext[]; - This definition is erroneous when used with %pointer, but - correct for %array. - - %array defines yytext to be an array of YYLMAX characters, - which defaults to a fairly large value. You can change the - size by simply #define'ing YYLMAX to a different value in - the first section of your flex input. As mentioned above, - with %pointer yytext grows dynamically to accommodate large - tokens. While this means your %pointer scanner can accommo- - date very large tokens (such as matching entire blocks of - comments), bear in mind that each time the scanner must - - - -Version 2.5 Last change: April 1995 10 - - - - - - -FLEX(1) USER COMMANDS FLEX(1) - - - - resize yytext it also must rescan the entire token from the - beginning, so matching such tokens can prove slow. yytext - presently does not dynamically grow if a call to unput() - results in too much text being pushed back; instead, a run- - time error results. - - Also note that you cannot use %array with C++ scanner - classes (the c++ option; see below). - -ACTIONS - Each pattern in a rule has a corresponding action, which can - be any arbitrary C statement. The pattern ends at the first - non-escaped whitespace character; the remainder of the line - is its action. If the action is empty, then when the pat- - tern is matched the input token is simply discarded. For - example, here is the specification for a program which - deletes all occurrences of "zap me" from its input: - - %% - "zap me" - - (It will copy all other characters in the input to the out- - put since they will be matched by the default rule.) - - Here is a program which compresses multiple blanks and tabs - down to a single blank, and throws away whitespace found at - the end of a line: - - %% - [ \t]+ putchar( ' ' ); - [ \t]+$ /* ignore this token */ - - - If the action contains a '{', then the action spans till the - balancing '}' is found, and the action may cross multiple - lines. flex knows about C strings and comments and won't be - fooled by braces found within them, but also allows actions - to begin with %{ and will consider the action to be all the - text up to the next %} (regardless of ordinary braces inside - the action). - - An action consisting solely of a vertical bar ('|') means - "same as the action for the next rule." See below for an - illustration. - - Actions can include arbitrary C code, including return - statements to return a value to whatever routine called - yylex(). Each time yylex() is called it continues processing - tokens from where it last left off until it either reaches - the end of the file or executes a return. - - - - - -Version 2.5 Last change: April 1995 11 - - - - - - -FLEX(1) USER COMMANDS FLEX(1) - - - - Actions are free to modify yytext except for lengthening it - (adding characters to its end--these will overwrite later - characters in the input stream). This however does not - apply when using %array (see above); in that case, yytext - may be freely modified in any way. - - Actions are free to modify yyleng except they should not do - so if the action also includes use of yymore() (see below). - - There are a number of special directives which can be - included within an action: - - - ECHO copies yytext to the scanner's output. - - - BEGIN followed by the name of a start condition places - the scanner in the corresponding start condition (see - below). - - - REJECT directs the scanner to proceed on to the "second - best" rule which matched the input (or a prefix of the - input). The rule is chosen as described above in "How - the Input is Matched", and yytext and yyleng set up - appropriately. It may either be one which matched as - much text as the originally chosen rule but came later - in the flex input file, or one which matched less text. - For example, the following will both count the words in - the input and call the routine special() whenever - "frob" is seen: - - int word_count = 0; - %% - - frob special(); REJECT; - [^ \t\n]+ ++word_count; - - Without the REJECT, any "frob"'s in the input would not - be counted as words, since the scanner normally exe- - cutes only one action per token. Multiple REJECT's are - allowed, each one finding the next best choice to the - currently active rule. For example, when the following - scanner scans the token "abcd", it will write "abcdab- - caba" to the output: - - %% - a | - ab | - abc | - abcd ECHO; REJECT; - .|\n /* eat up any unmatched character */ - - (The first three rules share the fourth's action since - they use the special '|' action.) REJECT is a - - - -Version 2.5 Last change: April 1995 12 - - - - - - -FLEX(1) USER COMMANDS FLEX(1) - - - - particularly expensive feature in terms of scanner per- - formance; if it is used in any of the scanner's actions - it will slow down all of the scanner's matching. - Furthermore, REJECT cannot be used with the -Cf or -CF - options (see below). - - Note also that unlike the other special actions, REJECT - is a branch; code immediately following it in the - action will not be executed. - - - yymore() tells the scanner that the next time it - matches a rule, the corresponding token should be - appended onto the current value of yytext rather than - replacing it. For example, given the input "mega- - kludge" the following will write "mega-mega-kludge" to - the output: - - %% - mega- ECHO; yymore(); - kludge ECHO; - - First "mega-" is matched and echoed to the output. - Then "kludge" is matched, but the previous "mega-" is - still hanging around at the beginning of yytext so the - ECHO for the "kludge" rule will actually write "mega- - kludge". - - Two notes regarding use of yymore(). First, yymore() depends - on the value of yyleng correctly reflecting the size of the - current token, so you must not modify yyleng if you are - using yymore(). Second, the presence of yymore() in the - scanner's action entails a minor performance penalty in the - scanner's matching speed. - - - yyless(n) returns all but the first n characters of the - current token back to the input stream, where they will - be rescanned when the scanner looks for the next match. - yytext and yyleng are adjusted appropriately (e.g., - yyleng will now be equal to n ). For example, on the - input "foobar" the following will write out "foobar- - bar": - - %% - foobar ECHO; yyless(3); - [a-z]+ ECHO; - - An argument of 0 to yyless will cause the entire - current input string to be scanned again. Unless - you've changed how the scanner will subsequently pro- - cess its input (using BEGIN, for example), this will - result in an endless loop. - - - - -Version 2.5 Last change: April 1995 13 - - - - - - -FLEX(1) USER COMMANDS FLEX(1) - - - - Note that yyless is a macro and can only be used in the flex - input file, not from other source files. - - - unput(c) puts the character c back onto the input - stream. It will be the next character scanned. The - following action will take the current token and cause - it to be rescanned enclosed in parentheses. - - { - int i; - /* Copy yytext because unput() trashes yytext */ - char *yycopy = strdup( yytext ); - unput( ')' ); - for ( i = yyleng - 1; i >= 0; --i ) - unput( yycopy[i] ); - unput( '(' ); - free( yycopy ); - } - - Note that since each unput() puts the given character - back at the beginning of the input stream, pushing back - strings must be done back-to-front. - - An important potential problem when using unput() is that if - you are using %pointer (the default), a call to unput() des- - troys the contents of yytext, starting with its rightmost - character and devouring one character to the left with each - call. If you need the value of yytext preserved after a - call to unput() (as in the above example), you must either - first copy it elsewhere, or build your scanner using %array - instead (see How The Input Is Matched). - - Finally, note that you cannot put back EOF to attempt to - mark the input stream with an end-of-file. - - - input() reads the next character from the input stream. - For example, the following is one way to eat up C com- - ments: - - %% - "/*" { - register int c; - - for ( ; ; ) - { - while ( (c = input()) != '*' && - c != EOF ) - ; /* eat up text of comment */ - - if ( c == '*' ) - { - while ( (c = input()) == '*' ) - - - -Version 2.5 Last change: April 1995 14 - - - - - - -FLEX(1) USER COMMANDS FLEX(1) - - - - ; - if ( c == '/' ) - break; /* found the end */ - } - - if ( c == EOF ) - { - error( "EOF in comment" ); - break; - } - } - } - - (Note that if the scanner is compiled using C++, then - input() is instead referred to as yyinput(), in order - to avoid a name clash with the C++ stream by the name - of input.) - - - YY_FLUSH_BUFFER flushes the scanner's internal buffer - so that the next time the scanner attempts to match a - token, it will first refill the buffer using YY_INPUT - (see The Generated Scanner, below). This action is a - special case of the more general yy_flush_buffer() - function, described below in the section Multiple Input - Buffers. - - - yyterminate() can be used in lieu of a return statement - in an action. It terminates the scanner and returns a - 0 to the scanner's caller, indicating "all done". By - default, yyterminate() is also called when an end-of- - file is encountered. It is a macro and may be rede- - fined. - -THE GENERATED SCANNER - The output of flex is the file lex.yy.c, which contains the - scanning routine yylex(), a number of tables used by it for - matching tokens, and a number of auxiliary routines and mac- - ros. By default, yylex() is declared as follows: - - int yylex() - { - ... various definitions and the actions in here ... - } - - (If your environment supports function prototypes, then it - will be "int yylex( void )".) This definition may be - changed by defining the "YY_DECL" macro. For example, you - could use: - - #define YY_DECL float lexscan( a, b ) float a, b; - - to give the scanning routine the name lexscan, returning a - - - -Version 2.5 Last change: April 1995 15 - - - - - - -FLEX(1) USER COMMANDS FLEX(1) - - - - float, and taking two floats as arguments. Note that if you - give arguments to the scanning routine using a K&R- - style/non-prototyped function declaration, you must ter- - minate the definition with a semi-colon (;). - - Whenever yylex() is called, it scans tokens from the global - input file yyin (which defaults to stdin). It continues - until it either reaches an end-of-file (at which point it - returns the value 0) or one of its actions executes a return - statement. - - If the scanner reaches an end-of-file, subsequent calls are - undefined unless either yyin is pointed at a new input file - (in which case scanning continues from that file), or yyres- - tart() is called. yyrestart() takes one argument, a FILE * - pointer (which can be nil, if you've set up YY_INPUT to scan - from a source other than yyin), and initializes yyin for - scanning from that file. Essentially there is no difference - between just assigning yyin to a new input file or using - yyrestart() to do so; the latter is available for compati- - bility with previous versions of flex, and because it can be - used to switch input files in the middle of scanning. It - can also be used to throw away the current input buffer, by - calling it with an argument of yyin; but better is to use - YY_FLUSH_BUFFER (see above). Note that yyrestart() does not - reset the start condition to INITIAL (see Start Conditions, - below). - - If yylex() stops scanning due to executing a return state- - ment in one of the actions, the scanner may then be called - again and it will resume scanning where it left off. - - By default (and for purposes of efficiency), the scanner - uses block-reads rather than simple getc() calls to read - characters from yyin. The nature of how it gets its input - can be controlled by defining the YY_INPUT macro. - YY_INPUT's calling sequence is - "YY_INPUT(buf,result,max_size)". Its action is to place up - to max_size characters in the character array buf and return - in the integer variable result either the number of charac- - ters read or the constant YY_NULL (0 on Unix systems) to - indicate EOF. The default YY_INPUT reads from the global - file-pointer "yyin". - - A sample definition of YY_INPUT (in the definitions section - of the input file): - - %{ - #define YY_INPUT(buf,result,max_size) \ - { \ - int c = getchar(); \ - result = (c == EOF) ? YY_NULL : (buf[0] = c, 1); \ - - - -Version 2.5 Last change: April 1995 16 - - - - - - -FLEX(1) USER COMMANDS FLEX(1) - - - - } - %} - - This definition will change the input processing to occur - one character at a time. - - When the scanner receives an end-of-file indication from - YY_INPUT, it then checks the yywrap() function. If yywrap() - returns false (zero), then it is assumed that the function - has gone ahead and set up yyin to point to another input - file, and scanning continues. If it returns true (non- - zero), then the scanner terminates, returning 0 to its - caller. Note that in either case, the start condition - remains unchanged; it does not revert to INITIAL. - - If you do not supply your own version of yywrap(), then you - must either use %option noyywrap (in which case the scanner - behaves as though yywrap() returned 1), or you must link - with -lfl to obtain the default version of the routine, - which always returns 1. - - Three routines are available for scanning from in-memory - buffers rather than files: yy_scan_string(), - yy_scan_bytes(), and yy_scan_buffer(). See the discussion of - them below in the section Multiple Input Buffers. - - The scanner writes its ECHO output to the yyout global - (default, stdout), which may be redefined by the user simply - by assigning it to some other FILE pointer. - -START CONDITIONS - flex provides a mechanism for conditionally activating - rules. Any rule whose pattern is prefixed with "" will - only be active when the scanner is in the start condition - named "sc". For example, - - [^"]* { /* eat up the string body ... */ - ... - } - - will be active only when the scanner is in the "STRING" - start condition, and - - \. { /* handle an escape ... */ - ... - } - - will be active only when the current start condition is - either "INITIAL", "STRING", or "QUOTE". - - Start conditions are declared in the definitions (first) - section of the input using unindented lines beginning with - - - -Version 2.5 Last change: April 1995 17 - - - - - - -FLEX(1) USER COMMANDS FLEX(1) - - - - either %s or %x followed by a list of names. The former - declares inclusive start conditions, the latter exclusive - start conditions. A start condition is activated using the - BEGIN action. Until the next BEGIN action is executed, - rules with the given start condition will be active and - rules with other start conditions will be inactive. If the - start condition is inclusive, then rules with no start con- - ditions at all will also be active. If it is exclusive, - then only rules qualified with the start condition will be - active. A set of rules contingent on the same exclusive - start condition describe a scanner which is independent of - any of the other rules in the flex input. Because of this, - exclusive start conditions make it easy to specify "mini- - scanners" which scan portions of the input that are syntac- - tically different from the rest (e.g., comments). - - If the distinction between inclusive and exclusive start - conditions is still a little vague, here's a simple example - illustrating the connection between the two. The set of - rules: - - %s example - %% - - foo do_something(); - - bar something_else(); - - is equivalent to - - %x example - %% - - foo do_something(); - - bar something_else(); - - Without the qualifier, the bar pattern in - the second example wouldn't be active (i.e., couldn't match) - when in start condition example. If we just used - to qualify bar, though, then it would only be active in - example and not in INITIAL, while in the first example it's - active in both, because in the first example the example - startion condition is an inclusive (%s) start condition. - - Also note that the special start-condition specifier <*> - matches every start condition. Thus, the above example - could also have been written; - - %x example - %% - - - - -Version 2.5 Last change: April 1995 18 - - - - - - -FLEX(1) USER COMMANDS FLEX(1) - - - - foo do_something(); - - <*>bar something_else(); - - - The default rule (to ECHO any unmatched character) remains - active in start conditions. It is equivalent to: - - <*>.|\n ECHO; - - - BEGIN(0) returns to the original state where only the rules - with no start conditions are active. This state can also be - referred to as the start-condition "INITIAL", so - BEGIN(INITIAL) is equivalent to BEGIN(0). (The parentheses - around the start condition name are not required but are - considered good style.) - - BEGIN actions can also be given as indented code at the - beginning of the rules section. For example, the following - will cause the scanner to enter the "SPECIAL" start condi- - tion whenever yylex() is called and the global variable - enter_special is true: - - int enter_special; - - %x SPECIAL - %% - if ( enter_special ) - BEGIN(SPECIAL); - - blahblahblah - ...more rules follow... - - - To illustrate the uses of start conditions, here is a - scanner which provides two different interpretations of a - string like "123.456". By default it will treat it as three - tokens, the integer "123", a dot ('.'), and the integer - "456". But if the string is preceded earlier in the line by - the string "expect-floats" it will treat it as a single - token, the floating-point number 123.456: - - %{ - #include - %} - %s expect - - %% - expect-floats BEGIN(expect); - - [0-9]+"."[0-9]+ { - - - -Version 2.5 Last change: April 1995 19 - - - - - - -FLEX(1) USER COMMANDS FLEX(1) - - - - printf( "found a float, = %f\n", - atof( yytext ) ); - } - \n { - /* that's the end of the line, so - * we need another "expect-number" - * before we'll recognize any more - * numbers - */ - BEGIN(INITIAL); - } - - [0-9]+ { - printf( "found an integer, = %d\n", - atoi( yytext ) ); - } - - "." printf( "found a dot\n" ); - - Here is a scanner which recognizes (and discards) C comments - while maintaining a count of the current input line. - - %x comment - %% - int line_num = 1; - - "/*" BEGIN(comment); - - [^*\n]* /* eat anything that's not a '*' */ - "*"+[^*/\n]* /* eat up '*'s not followed by '/'s */ - \n ++line_num; - "*"+"/" BEGIN(INITIAL); - - This scanner goes to a bit of trouble to match as much text - as possible with each rule. In general, when attempting to - write a high-speed scanner try to match as much possible in - each rule, as it's a big win. - - Note that start-conditions names are really integer values - and can be stored as such. Thus, the above could be - extended in the following fashion: - - %x comment foo - %% - int line_num = 1; - int comment_caller; - - "/*" { - comment_caller = INITIAL; - BEGIN(comment); - } - - - - -Version 2.5 Last change: April 1995 20 - - - - - - -FLEX(1) USER COMMANDS FLEX(1) - - - - ... - - "/*" { - comment_caller = foo; - BEGIN(comment); - } - - [^*\n]* /* eat anything that's not a '*' */ - "*"+[^*/\n]* /* eat up '*'s not followed by '/'s */ - \n ++line_num; - "*"+"/" BEGIN(comment_caller); - - Furthermore, you can access the current start condition - using the integer-valued YY_START macro. For example, the - above assignments to comment_caller could instead be written - - comment_caller = YY_START; - - Flex provides YYSTATE as an alias for YY_START (since that - is what's used by AT&T lex). - - Note that start conditions do not have their own name-space; - %s's and %x's declare names in the same fashion as - #define's. - - Finally, here's an example of how to match C-style quoted - strings using exclusive start conditions, including expanded - escape sequences (but not including checking for a string - that's too long): - - %x str - - %% - char string_buf[MAX_STR_CONST]; - char *string_buf_ptr; - - - \" string_buf_ptr = string_buf; BEGIN(str); - - \" { /* saw closing quote - all done */ - BEGIN(INITIAL); - *string_buf_ptr = '\0'; - /* return string constant token type and - * value to parser - */ - } - - \n { - /* error - unterminated string constant */ - /* generate error message */ - } - - - - -Version 2.5 Last change: April 1995 21 - - - - - - -FLEX(1) USER COMMANDS FLEX(1) - - - - \\[0-7]{1,3} { - /* octal escape sequence */ - int result; - - (void) sscanf( yytext + 1, "%o", &result ); - - if ( result > 0xff ) - /* error, constant is out-of-bounds */ - - *string_buf_ptr++ = result; - } - - \\[0-9]+ { - /* generate error - bad escape sequence; something - * like '\48' or '\0777777' - */ - } - - \\n *string_buf_ptr++ = '\n'; - \\t *string_buf_ptr++ = '\t'; - \\r *string_buf_ptr++ = '\r'; - \\b *string_buf_ptr++ = '\b'; - \\f *string_buf_ptr++ = '\f'; - - \\(.|\n) *string_buf_ptr++ = yytext[1]; - - [^\\\n\"]+ { - char *yptr = yytext; - - while ( *yptr ) - *string_buf_ptr++ = *yptr++; - } - - - Often, such as in some of the examples above, you wind up - writing a whole bunch of rules all preceded by the same - start condition(s). Flex makes this a little easier and - cleaner by introducing a notion of start condition scope. A - start condition scope is begun with: - - { - - where SCs is a list of one or more start conditions. Inside - the start condition scope, every rule automatically has the - prefix applied to it, until a '}' which matches the - initial '{'. So, for example, - - { - "\\n" return '\n'; - "\\r" return '\r'; - "\\f" return '\f'; - "\\0" return '\0'; - - - -Version 2.5 Last change: April 1995 22 - - - - - - -FLEX(1) USER COMMANDS FLEX(1) - - - - } - - is equivalent to: - - "\\n" return '\n'; - "\\r" return '\r'; - "\\f" return '\f'; - "\\0" return '\0'; - - Start condition scopes may be nested. - - Three routines are available for manipulating stacks of - start conditions: - - void yy_push_state(int new_state) - pushes the current start condition onto the top of the - start condition stack and switches to new_state as - though you had used BEGIN new_state (recall that start - condition names are also integers). - - void yy_pop_state() - pops the top of the stack and switches to it via BEGIN. - - int yy_top_state() - returns the top of the stack without altering the - stack's contents. - - The start condition stack grows dynamically and so has no - built-in size limitation. If memory is exhausted, program - execution aborts. - - To use start condition stacks, your scanner must include a - %option stack directive (see Options below). - -MULTIPLE INPUT BUFFERS - Some scanners (such as those which support "include" files) - require reading from several input streams. As flex - scanners do a large amount of buffering, one cannot control - where the next input will be read from by simply writing a - YY_INPUT which is sensitive to the scanning context. - YY_INPUT is only called when the scanner reaches the end of - its buffer, which may be a long time after scanning a state- - ment such as an "include" which requires switching the input - source. - - To negotiate these sorts of problems, flex provides a - mechanism for creating and switching between multiple input - buffers. An input buffer is created by using: - - YY_BUFFER_STATE yy_create_buffer( FILE *file, int size ) - - which takes a FILE pointer and a size and creates a buffer - - - -Version 2.5 Last change: April 1995 23 - - - - - - -FLEX(1) USER COMMANDS FLEX(1) - - - - associated with the given file and large enough to hold size - characters (when in doubt, use YY_BUF_SIZE for the size). - It returns a YY_BUFFER_STATE handle, which may then be - passed to other routines (see below). The YY_BUFFER_STATE - type is a pointer to an opaque struct yy_buffer_state struc- - ture, so you may safely initialize YY_BUFFER_STATE variables - to ((YY_BUFFER_STATE) 0) if you wish, and also refer to the - opaque structure in order to correctly declare input buffers - in source files other than that of your scanner. Note that - the FILE pointer in the call to yy_create_buffer is only - used as the value of yyin seen by YY_INPUT; if you redefine - YY_INPUT so it no longer uses yyin, then you can safely pass - a nil FILE pointer to yy_create_buffer. You select a partic- - ular buffer to scan from using: - - void yy_switch_to_buffer( YY_BUFFER_STATE new_buffer ) - - switches the scanner's input buffer so subsequent tokens - will come from new_buffer. Note that yy_switch_to_buffer() - may be used by yywrap() to set things up for continued scan- - ning, instead of opening a new file and pointing yyin at it. - Note also that switching input sources via either - yy_switch_to_buffer() or yywrap() does not change the start - condition. - - void yy_delete_buffer( YY_BUFFER_STATE buffer ) - - is used to reclaim the storage associated with a buffer. ( - buffer can be nil, in which case the routine does nothing.) - You can also clear the current contents of a buffer using: - - void yy_flush_buffer( YY_BUFFER_STATE buffer ) - - This function discards the buffer's contents, so the next - time the scanner attempts to match a token from the buffer, - it will first fill the buffer anew using YY_INPUT. - - yy_new_buffer() is an alias for yy_create_buffer(), provided - for compatibility with the C++ use of new and delete for - creating and destroying dynamic objects. - - Finally, the YY_CURRENT_BUFFER macro returns a - YY_BUFFER_STATE handle to the current buffer. - - Here is an example of using these features for writing a - scanner which expands include files (the <> feature is - discussed below): - - /* the "incl" state is used for picking up the name - * of an include file - */ - %x incl - - - -Version 2.5 Last change: April 1995 24 - - - - - - -FLEX(1) USER COMMANDS FLEX(1) - - - - %{ - #define MAX_INCLUDE_DEPTH 10 - YY_BUFFER_STATE include_stack[MAX_INCLUDE_DEPTH]; - int include_stack_ptr = 0; - %} - - %% - include BEGIN(incl); - - [a-z]+ ECHO; - [^a-z\n]*\n? ECHO; - - [ \t]* /* eat the whitespace */ - [^ \t\n]+ { /* got the include file name */ - if ( include_stack_ptr >= MAX_INCLUDE_DEPTH ) - { - fprintf( stderr, "Includes nested too deeply" ); - exit( 1 ); - } - - include_stack[include_stack_ptr++] = - YY_CURRENT_BUFFER; - - yyin = fopen( yytext, "r" ); - - if ( ! yyin ) - error( ... ); - - yy_switch_to_buffer( - yy_create_buffer( yyin, YY_BUF_SIZE ) ); - - BEGIN(INITIAL); - } - - <> { - if ( --include_stack_ptr < 0 ) - { - yyterminate(); - } - - else - { - yy_delete_buffer( YY_CURRENT_BUFFER ); - yy_switch_to_buffer( - include_stack[include_stack_ptr] ); - } - } - - Three routines are available for setting up input buffers - for scanning in-memory strings instead of files. All of - them create a new input buffer for scanning the string, and - return a corresponding YY_BUFFER_STATE handle (which you - - - -Version 2.5 Last change: April 1995 25 - - - - - - -FLEX(1) USER COMMANDS FLEX(1) - - - - should delete with yy_delete_buffer() when done with it). - They also switch to the new buffer using - yy_switch_to_buffer(), so the next call to yylex() will - start scanning the string. - - yy_scan_string(const char *str) - scans a NUL-terminated string. - - yy_scan_bytes(const char *bytes, int len) - scans len bytes (including possibly NUL's) starting at - location bytes. - - Note that both of these functions create and scan a copy of - the string or bytes. (This may be desirable, since yylex() - modifies the contents of the buffer it is scanning.) You - can avoid the copy by using: - - yy_scan_buffer(char *base, yy_size_t size) - which scans in place the buffer starting at base, con- - sisting of size bytes, the last two bytes of which must - be YY_END_OF_BUFFER_CHAR (ASCII NUL). These last two - bytes are not scanned; thus, scanning consists of - base[0] through base[size-2], inclusive. - - If you fail to set up base in this manner (i.e., forget - the final two YY_END_OF_BUFFER_CHAR bytes), then - yy_scan_buffer() returns a nil pointer instead of - creating a new input buffer. - - The type yy_size_t is an integral type to which you can - cast an integer expression reflecting the size of the - buffer. - -END-OF-FILE RULES - The special rule "<>" indicates actions which are to be - taken when an end-of-file is encountered and yywrap() - returns non-zero (i.e., indicates no further files to pro- - cess). The action must finish by doing one of four things: - - - assigning yyin to a new input file (in previous ver- - sions of flex, after doing the assignment you had to - call the special action YY_NEW_FILE; this is no longer - necessary); - - - executing a return statement; - - - executing the special yyterminate() action; - - - or, switching to a new buffer using - yy_switch_to_buffer() as shown in the example above. - - - - - -Version 2.5 Last change: April 1995 26 - - - - - - -FLEX(1) USER COMMANDS FLEX(1) - - - - <> rules may not be used with other patterns; they may - only be qualified with a list of start conditions. If an - unqualified <> rule is given, it applies to all start - conditions which do not already have <> actions. To - specify an <> rule for only the initial start condi- - tion, use - - <> - - - These rules are useful for catching things like unclosed - comments. An example: - - %x quote - %% - - ...other rules for dealing with quotes... - - <> { - error( "unterminated quote" ); - yyterminate(); - } - <> { - if ( *++filelist ) - yyin = fopen( *filelist, "r" ); - else - yyterminate(); - } - - -MISCELLANEOUS MACROS - The macro YY_USER_ACTION can be defined to provide an action - which is always executed prior to the matched rule's action. - For example, it could be #define'd to call a routine to con- - vert yytext to lower-case. When YY_USER_ACTION is invoked, - the variable yy_act gives the number of the matched rule - (rules are numbered starting with 1). Suppose you want to - profile how often each of your rules is matched. The fol- - lowing would do the trick: - - #define YY_USER_ACTION ++ctr[yy_act] - - where ctr is an array to hold the counts for the different - rules. Note that the macro YY_NUM_RULES gives the total - number of rules (including the default rule, even if you use - -s), so a correct declaration for ctr is: - - int ctr[YY_NUM_RULES]; - - - The macro YY_USER_INIT may be defined to provide an action - which is always executed before the first scan (and before - - - -Version 2.5 Last change: April 1995 27 - - - - - - -FLEX(1) USER COMMANDS FLEX(1) - - - - the scanner's internal initializations are done). For exam- - ple, it could be used to call a routine to read in a data - table or open a logging file. - - The macro yy_set_interactive(is_interactive) can be used to - control whether the current buffer is considered interac- - tive. An interactive buffer is processed more slowly, but - must be used when the scanner's input source is indeed - interactive to avoid problems due to waiting to fill buffers - (see the discussion of the -I flag below). A non-zero value - in the macro invocation marks the buffer as interactive, a - zero value as non-interactive. Note that use of this macro - overrides %option always-interactive or %option never- - interactive (see Options below). yy_set_interactive() must - be invoked prior to beginning to scan the buffer that is (or - is not) to be considered interactive. - - The macro yy_set_bol(at_bol) can be used to control whether - the current buffer's scanning context for the next token - match is done as though at the beginning of a line. A non- - zero macro argument makes rules anchored with - - The macro YY_AT_BOL() returns true if the next token scanned - from the current buffer will have '^' rules active, false - otherwise. - - In the generated scanner, the actions are all gathered in - one large switch statement and separated using YY_BREAK, - which may be redefined. By default, it is simply a "break", - to separate each rule's action from the following rule's. - Redefining YY_BREAK allows, for example, C++ users to - #define YY_BREAK to do nothing (while being very careful - that every rule ends with a "break" or a "return"!) to avoid - suffering from unreachable statement warnings where because - a rule's action ends with "return", the YY_BREAK is inacces- - sible. - -VALUES AVAILABLE TO THE USER - This section summarizes the various values available to the - user in the rule actions. - - - char *yytext holds the text of the current token. It - may be modified but not lengthened (you cannot append - characters to the end). - - If the special directive %array appears in the first - section of the scanner description, then yytext is - instead declared char yytext[YYLMAX], where YYLMAX is a - macro definition that you can redefine in the first - section if you don't like the default value (generally - 8KB). Using %array results in somewhat slower - scanners, but the value of yytext becomes immune to - - - -Version 2.5 Last change: April 1995 28 - - - - - - -FLEX(1) USER COMMANDS FLEX(1) - - - - calls to input() and unput(), which potentially destroy - its value when yytext is a character pointer. The - opposite of %array is %pointer, which is the default. - - You cannot use %array when generating C++ scanner - classes (the -+ flag). - - - int yyleng holds the length of the current token. - - - FILE *yyin is the file which by default flex reads - from. It may be redefined but doing so only makes - sense before scanning begins or after an EOF has been - encountered. Changing it in the midst of scanning will - have unexpected results since flex buffers its input; - use yyrestart() instead. Once scanning terminates - because an end-of-file has been seen, you can assign - yyin at the new input file and then call the scanner - again to continue scanning. - - - void yyrestart( FILE *new_file ) may be called to point - yyin at the new input file. The switch-over to the new - file is immediate (any previously buffered-up input is - lost). Note that calling yyrestart() with yyin as an - argument thus throws away the current input buffer and - continues scanning the same input file. - - - FILE *yyout is the file to which ECHO actions are done. - It can be reassigned by the user. - - - YY_CURRENT_BUFFER returns a YY_BUFFER_STATE handle to - the current buffer. - - - YY_START returns an integer value corresponding to the - current start condition. You can subsequently use this - value with BEGIN to return to that start condition. - -INTERFACING WITH YACC - One of the main uses of flex is as a companion to the yacc - parser-generator. yacc parsers expect to call a routine - named yylex() to find the next input token. The routine is - supposed to return the type of the next token as well as - putting any associated value in the global yylval. To use - flex with yacc, one specifies the -d option to yacc to - instruct it to generate the file y.tab.h containing defini- - tions of all the %tokens appearing in the yacc input. This - file is then included in the flex scanner. For example, if - one of the tokens is "TOK_NUMBER", part of the scanner might - look like: - - %{ - #include "y.tab.h" - %} - - - -Version 2.5 Last change: April 1995 29 - - - - - - -FLEX(1) USER COMMANDS FLEX(1) - - - - %% - - [0-9]+ yylval = atoi( yytext ); return TOK_NUMBER; - - -OPTIONS - flex has the following options: - - -b Generate backing-up information to lex.backup. This is - a list of scanner states which require backing up and - the input characters on which they do so. By adding - rules one can remove backing-up states. If all - backing-up states are eliminated and -Cf or -CF is - used, the generated scanner will run faster (see the -p - flag). Only users who wish to squeeze every last cycle - out of their scanners need worry about this option. - (See the section on Performance Considerations below.) - - -c is a do-nothing, deprecated option included for POSIX - compliance. - - -d makes the generated scanner run in debug mode. When- - ever a pattern is recognized and the global - yy_flex_debug is non-zero (which is the default), the - scanner will write to stderr a line of the form: - - --accepting rule at line 53 ("the matched text") - - The line number refers to the location of the rule in - the file defining the scanner (i.e., the file that was - fed to flex). Messages are also generated when the - scanner backs up, accepts the default rule, reaches the - end of its input buffer (or encounters a NUL; at this - point, the two look the same as far as the scanner's - concerned), or reaches an end-of-file. - - -f specifies fast scanner. No table compression is done - and stdio is bypassed. The result is large but fast. - This option is equivalent to -Cfr (see below). - - -h generates a "help" summary of flex's options to stdout - and then exits. -? and --help are synonyms for -h. - - -i instructs flex to generate a case-insensitive scanner. - The case of letters given in the flex input patterns - will be ignored, and tokens in the input will be - matched regardless of case. The matched text given in - yytext will have the preserved case (i.e., it will not - be folded). - - -l turns on maximum compatibility with the original AT&T - lex implementation. Note that this does not mean full - - - -Version 2.5 Last change: April 1995 30 - - - - - - -FLEX(1) USER COMMANDS FLEX(1) - - - - compatibility. Use of this option costs a considerable - amount of performance, and it cannot be used with the - -+, -f, -F, -Cf, or -CF options. For details on the - compatibilities it provides, see the section "Incompa- - tibilities With Lex And POSIX" below. This option also - results in the name YY_FLEX_LEX_COMPAT being #define'd - in the generated scanner. - - -n is another do-nothing, deprecated option included only - for POSIX compliance. - - -p generates a performance report to stderr. The report - consists of comments regarding features of the flex - input file which will cause a serious loss of perfor- - mance in the resulting scanner. If you give the flag - twice, you will also get comments regarding features - that lead to minor performance losses. - - Note that the use of REJECT, %option yylineno, and - variable trailing context (see the Deficiencies / Bugs - section below) entails a substantial performance - penalty; use of yymore(), the ^ operator, and the -I - flag entail minor performance penalties. - - -s causes the default rule (that unmatched scanner input - is echoed to stdout) to be suppressed. If the scanner - encounters input that does not match any of its rules, - it aborts with an error. This option is useful for - finding holes in a scanner's rule set. - - -t instructs flex to write the scanner it generates to - standard output instead of lex.yy.c. - - -v specifies that flex should write to stderr a summary of - statistics regarding the scanner it generates. Most of - the statistics are meaningless to the casual flex user, - but the first line identifies the version of flex (same - as reported by -V), and the next line the flags used - when generating the scanner, including those that are - on by default. - - -w suppresses warning messages. - - -B instructs flex to generate a batch scanner, the oppo- - site of interactive scanners generated by -I (see - below). In general, you use -B when you are certain - that your scanner will never be used interactively, and - you want to squeeze a little more performance out of - it. If your goal is instead to squeeze out a lot more - performance, you should be using the -Cf or -CF - options (discussed below), which turn on -B automati- - cally anyway. - - - -Version 2.5 Last change: April 1995 31 - - - - - - -FLEX(1) USER COMMANDS FLEX(1) - - - - -F specifies that the fast scanner table representation - should be used (and stdio bypassed). This representa- - tion is about as fast as the full table representation - (-f), and for some sets of patterns will be consider- - ably smaller (and for others, larger). In general, if - the pattern set contains both "keywords" and a catch- - all, "identifier" rule, such as in the set: - - "case" return TOK_CASE; - "switch" return TOK_SWITCH; - ... - "default" return TOK_DEFAULT; - [a-z]+ return TOK_ID; - - then you're better off using the full table representa- - tion. If only the "identifier" rule is present and you - then use a hash table or some such to detect the key- - words, you're better off using -F. - - This option is equivalent to -CFr (see below). It can- - not be used with -+. - - -I instructs flex to generate an interactive scanner. An - interactive scanner is one that only looks ahead to - decide what token has been matched if it absolutely - must. It turns out that always looking one extra char- - acter ahead, even if the scanner has already seen - enough text to disambiguate the current token, is a bit - faster than only looking ahead when necessary. But - scanners that always look ahead give dreadful interac- - tive performance; for example, when a user types a new- - line, it is not recognized as a newline token until - they enter another token, which often means typing in - another whole line. - - Flex scanners default to interactive unless you use the - -Cf or -CF table-compression options (see below). - That's because if you're looking for high-performance - you should be using one of these options, so if you - didn't, flex assumes you'd rather trade off a bit of - run-time performance for intuitive interactive - behavior. Note also that you cannot use -I in conjunc- - tion with -Cf or -CF. Thus, this option is not really - needed; it is on by default for all those cases in - which it is allowed. - - You can force a scanner to not be interactive by using - -B (see above). - - -L instructs flex not to generate #line directives. - Without this option, flex peppers the generated scanner - with #line directives so error messages in the actions - - - -Version 2.5 Last change: April 1995 32 - - - - - - -FLEX(1) USER COMMANDS FLEX(1) - - - - will be correctly located with respect to either the - original flex input file (if the errors are due to code - in the input file), or lex.yy.c (if the errors are - flex's fault -- you should report these sorts of errors - to the email address given below). - - -T makes flex run in trace mode. It will generate a lot - of messages to stderr concerning the form of the input - and the resultant non-deterministic and deterministic - finite automata. This option is mostly for use in - maintaining flex. - - -V prints the version number to stdout and exits. --ver- - sion is a synonym for -V. - - -7 instructs flex to generate a 7-bit scanner, i.e., one - which can only recognized 7-bit characters in its - input. The advantage of using -7 is that the scanner's - tables can be up to half the size of those generated - using the -8 option (see below). The disadvantage is - that such scanners often hang or crash if their input - contains an 8-bit character. - - Note, however, that unless you generate your scanner - using the -Cf or -CF table compression options, use of - -7 will save only a small amount of table space, and - make your scanner considerably less portable. Flex's - default behavior is to generate an 8-bit scanner unless - you use the -Cf or -CF, in which case flex defaults to - generating 7-bit scanners unless your site was always - configured to generate 8-bit scanners (as will often be - the case with non-USA sites). You can tell whether - flex generated a 7-bit or an 8-bit scanner by inspect- - ing the flag summary in the -v output as described - above. - - Note that if you use -Cfe or -CFe (those table compres- - sion options, but also using equivalence classes as - discussed see below), flex still defaults to generating - an 8-bit scanner, since usually with these compression - options full 8-bit tables are not much more expensive - than 7-bit tables. - - -8 instructs flex to generate an 8-bit scanner, i.e., one - which can recognize 8-bit characters. This flag is - only needed for scanners generated using -Cf or -CF, as - otherwise flex defaults to generating an 8-bit scanner - anyway. - - See the discussion of -7 above for flex's default - behavior and the tradeoffs between 7-bit and 8-bit - scanners. - - - -Version 2.5 Last change: April 1995 33 - - - - - - -FLEX(1) USER COMMANDS FLEX(1) - - - - -+ specifies that you want flex to generate a C++ scanner - class. See the section on Generating C++ Scanners - below for details. - - -C[aefFmr] - controls the degree of table compression and, more gen- - erally, trade-offs between small scanners and fast - scanners. - - -Ca ("align") instructs flex to trade off larger tables - in the generated scanner for faster performance because - the elements of the tables are better aligned for - memory access and computation. On some RISC architec- - tures, fetching and manipulating longwords is more - efficient than with smaller-sized units such as short- - words. This option can double the size of the tables - used by your scanner. - - -Ce directs flex to construct equivalence classes, - i.e., sets of characters which have identical lexical - properties (for example, if the only appearance of - digits in the flex input is in the character class - "[0-9]" then the digits '0', '1', ..., '9' will all be - put in the same equivalence class). Equivalence - classes usually give dramatic reductions in the final - table/object file sizes (typically a factor of 2-5) and - are pretty cheap performance-wise (one array look-up - per character scanned). - - -Cf specifies that the full scanner tables should be - generated - flex should not compress the tables by tak- - ing advantages of similar transition functions for dif- - ferent states. - - -CF specifies that the alternate fast scanner represen- - tation (described above under the -F flag) should be - used. This option cannot be used with -+. - - -Cm directs flex to construct meta-equivalence classes, - which are sets of equivalence classes (or characters, - if equivalence classes are not being used) that are - commonly used together. Meta-equivalence classes are - often a big win when using compressed tables, but they - have a moderate performance impact (one or two "if" - tests and one array look-up per character scanned). - - -Cr causes the generated scanner to bypass use of the - standard I/O library (stdio) for input. Instead of - calling fread() or getc(), the scanner will use the - read() system call, resulting in a performance gain - which varies from system to system, but in general is - probably negligible unless you are also using -Cf or - - - -Version 2.5 Last change: April 1995 34 - - - - - - -FLEX(1) USER COMMANDS FLEX(1) - - - - -CF. Using -Cr can cause strange behavior if, for exam- - ple, you read from yyin using stdio prior to calling - the scanner (because the scanner will miss whatever - text your previous reads left in the stdio input - buffer). - - -Cr has no effect if you define YY_INPUT (see The Gen- - erated Scanner above). - - A lone -C specifies that the scanner tables should be - compressed but neither equivalence classes nor meta- - equivalence classes should be used. - - The options -Cf or -CF and -Cm do not make sense - together - there is no opportunity for meta-equivalence - classes if the table is not being compressed. Other- - wise the options may be freely mixed, and are cumula- - tive. - - The default setting is -Cem, which specifies that flex - should generate equivalence classes and meta- - equivalence classes. This setting provides the highest - degree of table compression. You can trade off - faster-executing scanners at the cost of larger tables - with the following generally being true: - - slowest & smallest - -Cem - -Cm - -Ce - -C - -C{f,F}e - -C{f,F} - -C{f,F}a - fastest & largest - - Note that scanners with the smallest tables are usually - generated and compiled the quickest, so during develop- - ment you will usually want to use the default, maximal - compression. - - -Cfe is often a good compromise between speed and size - for production scanners. - - -ooutput - directs flex to write the scanner to the file output - instead of lex.yy.c. If you combine -o with the -t - option, then the scanner is written to stdout but its - #line directives (see the -L option above) refer to the - file output. - - -Pprefix - - - -Version 2.5 Last change: April 1995 35 - - - - - - -FLEX(1) USER COMMANDS FLEX(1) - - - - changes the default yy prefix used by flex for all - globally-visible variable and function names to instead - be prefix. For example, -Pfoo changes the name of - yytext to footext. It also changes the name of the - default output file from lex.yy.c to lex.foo.c. Here - are all of the names affected: - - yy_create_buffer - yy_delete_buffer - yy_flex_debug - yy_init_buffer - yy_flush_buffer - yy_load_buffer_state - yy_switch_to_buffer - yyin - yyleng - yylex - yylineno - yyout - yyrestart - yytext - yywrap - - (If you are using a C++ scanner, then only yywrap and - yyFlexLexer are affected.) Within your scanner itself, - you can still refer to the global variables and func- - tions using either version of their name; but exter- - nally, they have the modified name. - - This option lets you easily link together multiple flex - programs into the same executable. Note, though, that - using this option also renames yywrap(), so you now - must either provide your own (appropriately-named) ver- - sion of the routine for your scanner, or use %option - noyywrap, as linking with -lfl no longer provides one - for you by default. - - -Sskeleton_file - overrides the default skeleton file from which flex - constructs its scanners. You'll never need this option - unless you are doing flex maintenance or development. - - flex also provides a mechanism for controlling options - within the scanner specification itself, rather than from - the flex command-line. This is done by including %option - directives in the first section of the scanner specifica- - tion. You can specify multiple options with a single - %option directive, and multiple directives in the first sec- - tion of your flex input file. - - Most options are given simply as names, optionally preceded - by the word "no" (with no intervening whitespace) to negate - - - -Version 2.5 Last change: April 1995 36 - - - - - - -FLEX(1) USER COMMANDS FLEX(1) - - - - their meaning. A number are equivalent to flex flags or - their negation: - - 7bit -7 option - 8bit -8 option - align -Ca option - backup -b option - batch -B option - c++ -+ option - - caseful or - case-sensitive opposite of -i (default) - - case-insensitive or - caseless -i option - - debug -d option - default opposite of -s option - ecs -Ce option - fast -F option - full -f option - interactive -I option - lex-compat -l option - meta-ecs -Cm option - perf-report -p option - read -Cr option - stdout -t option - verbose -v option - warn opposite of -w option - (use "%option nowarn" for -w) - - array equivalent to "%array" - pointer equivalent to "%pointer" (default) - - Some %option's provide features otherwise not available: - - always-interactive - instructs flex to generate a scanner which always con- - siders its input "interactive". Normally, on each new - input file the scanner calls isatty() in an attempt to - determine whether the scanner's input source is - interactive and thus should be read a character at a - time. When this option is used, however, then no such - call is made. - - main directs flex to provide a default main() program for - the scanner, which simply calls yylex(). This option - implies noyywrap (see below). - - never-interactive - instructs flex to generate a scanner which never con- - siders its input "interactive" (again, no call made to - - - -Version 2.5 Last change: April 1995 37 - - - - - - -FLEX(1) USER COMMANDS FLEX(1) - - - - isatty()). This is the opposite of always-interactive. - - stack - enables the use of start condition stacks (see Start - Conditions above). - - stdinit - if set (i.e., %option stdinit) initializes yyin and - yyout to stdin and stdout, instead of the default of - nil. Some existing lex programs depend on this - behavior, even though it is not compliant with ANSI C, - which does not require stdin and stdout to be compile- - time constant. - - yylineno - directs flex to generate a scanner that maintains the - number of the current line read from its input in the - global variable yylineno. This option is implied by - %option lex-compat. - - yywrap - if unset (i.e., %option noyywrap), makes the scanner - not call yywrap() upon an end-of-file, but simply - assume that there are no more files to scan (until the - user points yyin at a new file and calls yylex() - again). - - flex scans your rule actions to determine whether you use - the REJECT or yymore() features. The reject and yymore - options are available to override its decision as to whether - you use the options, either by setting them (e.g., %option - reject) to indicate the feature is indeed used, or unsetting - them to indicate it actually is not used (e.g., %option - noyymore). - - Three options take string-delimited values, offset with '=': - - %option outfile="ABC" - - is equivalent to -oABC, and - - %option prefix="XYZ" - - is equivalent to -PXYZ. Finally, - - %option yyclass="foo" - - only applies when generating a C++ scanner ( -+ option). It - informs flex that you have derived foo as a subclass of - yyFlexLexer, so flex will place your actions in the member - function foo::yylex() instead of yyFlexLexer::yylex(). It - also generates a yyFlexLexer::yylex() member function that - - - -Version 2.5 Last change: April 1995 38 - - - - - - -FLEX(1) USER COMMANDS FLEX(1) - - - - emits a run-time error (by invoking - yyFlexLexer::LexerError()) if called. See Generating C++ - Scanners, below, for additional information. - - A number of options are available for lint purists who want - to suppress the appearance of unneeded routines in the gen- - erated scanner. Each of the following, if unset (e.g., - %option nounput ), results in the corresponding routine not - appearing in the generated scanner: - - input, unput - yy_push_state, yy_pop_state, yy_top_state - yy_scan_buffer, yy_scan_bytes, yy_scan_string - - (though yy_push_state() and friends won't appear anyway - unless you use %option stack). - -PERFORMANCE CONSIDERATIONS - The main design goal of flex is that it generate high- - performance scanners. It has been optimized for dealing - well with large sets of rules. Aside from the effects on - scanner speed of the table compression -C options outlined - above, there are a number of options/actions which degrade - performance. These are, from most expensive to least: - - REJECT - %option yylineno - arbitrary trailing context - - pattern sets that require backing up - %array - %option interactive - %option always-interactive - - '^' beginning-of-line operator - yymore() - - with the first three all being quite expensive and the last - two being quite cheap. Note also that unput() is imple- - mented as a routine call that potentially does quite a bit - of work, while yyless() is a quite-cheap macro; so if just - putting back some excess text you scanned, use yyless(). - - REJECT should be avoided at all costs when performance is - important. It is a particularly expensive option. - - Getting rid of backing up is messy and often may be an enor- - mous amount of work for a complicated scanner. In princi- - pal, one begins by using the -b flag to generate a - lex.backup file. For example, on the input - - %% - - - -Version 2.5 Last change: April 1995 39 - - - - - - -FLEX(1) USER COMMANDS FLEX(1) - - - - foo return TOK_KEYWORD; - foobar return TOK_KEYWORD; - - the file looks like: - - State #6 is non-accepting - - associated rule line numbers: - 2 3 - out-transitions: [ o ] - jam-transitions: EOF [ \001-n p-\177 ] - - State #8 is non-accepting - - associated rule line numbers: - 3 - out-transitions: [ a ] - jam-transitions: EOF [ \001-` b-\177 ] - - State #9 is non-accepting - - associated rule line numbers: - 3 - out-transitions: [ r ] - jam-transitions: EOF [ \001-q s-\177 ] - - Compressed tables always back up. - - The first few lines tell us that there's a scanner state in - which it can make a transition on an 'o' but not on any - other character, and that in that state the currently - scanned text does not match any rule. The state occurs when - trying to match the rules found at lines 2 and 3 in the - input file. If the scanner is in that state and then reads - something other than an 'o', it will have to back up to find - a rule which is matched. With a bit of headscratching one - can see that this must be the state it's in when it has seen - "fo". When this has happened, if anything other than - another 'o' is seen, the scanner will have to back up to - simply match the 'f' (by the default rule). - - The comment regarding State #8 indicates there's a problem - when "foob" has been scanned. Indeed, on any character - other than an 'a', the scanner will have to back up to - accept "foo". Similarly, the comment for State #9 concerns - when "fooba" has been scanned and an 'r' does not follow. - - The final comment reminds us that there's no point going to - all the trouble of removing backing up from the rules unless - we're using -Cf or -CF, since there's no performance gain - doing so with compressed scanners. - - The way to remove the backing up is to add "error" rules: - - %% - - - -Version 2.5 Last change: April 1995 40 - - - - - - -FLEX(1) USER COMMANDS FLEX(1) - - - - foo return TOK_KEYWORD; - foobar return TOK_KEYWORD; - - fooba | - foob | - fo { - /* false alarm, not really a keyword */ - return TOK_ID; - } - - - Eliminating backing up among a list of keywords can also be - done using a "catch-all" rule: - - %% - foo return TOK_KEYWORD; - foobar return TOK_KEYWORD; - - [a-z]+ return TOK_ID; - - This is usually the best solution when appropriate. - - Backing up messages tend to cascade. With a complicated set - of rules it's not uncommon to get hundreds of messages. If - one can decipher them, though, it often only takes a dozen - or so rules to eliminate the backing up (though it's easy to - make a mistake and have an error rule accidentally match a - valid token. A possible future flex feature will be to - automatically add rules to eliminate backing up). - - It's important to keep in mind that you gain the benefits of - eliminating backing up only if you eliminate every instance - of backing up. Leaving just one means you gain nothing. - - Variable trailing context (where both the leading and trail- - ing parts do not have a fixed length) entails almost the - same performance loss as REJECT (i.e., substantial). So - when possible a rule like: - - %% - mouse|rat/(cat|dog) run(); - - is better written: - - %% - mouse/cat|dog run(); - rat/cat|dog run(); - - or as - - %% - mouse|rat/cat run(); - - - -Version 2.5 Last change: April 1995 41 - - - - - - -FLEX(1) USER COMMANDS FLEX(1) - - - - mouse|rat/dog run(); - - Note that here the special '|' action does not provide any - savings, and can even make things worse (see Deficiencies / - Bugs below). - - Another area where the user can increase a scanner's perfor- - mance (and one that's easier to implement) arises from the - fact that the longer the tokens matched, the faster the - scanner will run. This is because with long tokens the pro- - cessing of most input characters takes place in the (short) - inner scanning loop, and does not often have to go through - the additional work of setting up the scanning environment - (e.g., yytext) for the action. Recall the scanner for C - comments: - - %x comment - %% - int line_num = 1; - - "/*" BEGIN(comment); - - [^*\n]* - "*"+[^*/\n]* - \n ++line_num; - "*"+"/" BEGIN(INITIAL); - - This could be sped up by writing it as: - - %x comment - %% - int line_num = 1; - - "/*" BEGIN(comment); - - [^*\n]* - [^*\n]*\n ++line_num; - "*"+[^*/\n]* - "*"+[^*/\n]*\n ++line_num; - "*"+"/" BEGIN(INITIAL); - - Now instead of each newline requiring the processing of - another action, recognizing the newlines is "distributed" - over the other rules to keep the matched text as long as - possible. Note that adding rules does not slow down the - scanner! The speed of the scanner is independent of the - number of rules or (modulo the considerations given at the - beginning of this section) how complicated the rules are - with regard to operators such as '*' and '|'. - - A final example in speeding up a scanner: suppose you want - to scan through a file containing identifiers and keywords, - - - -Version 2.5 Last change: April 1995 42 - - - - - - -FLEX(1) USER COMMANDS FLEX(1) - - - - one per line and with no other extraneous characters, and - recognize all the keywords. A natural first approach is: - - %% - asm | - auto | - break | - ... etc ... - volatile | - while /* it's a keyword */ - - .|\n /* it's not a keyword */ - - To eliminate the back-tracking, introduce a catch-all rule: - - %% - asm | - auto | - break | - ... etc ... - volatile | - while /* it's a keyword */ - - [a-z]+ | - .|\n /* it's not a keyword */ - - Now, if it's guaranteed that there's exactly one word per - line, then we can reduce the total number of matches by a - half by merging in the recognition of newlines with that of - the other tokens: - - %% - asm\n | - auto\n | - break\n | - ... etc ... - volatile\n | - while\n /* it's a keyword */ - - [a-z]+\n | - .|\n /* it's not a keyword */ - - One has to be careful here, as we have now reintroduced - backing up into the scanner. In particular, while we know - that there will never be any characters in the input stream - other than letters or newlines, flex can't figure this out, - and it will plan for possibly needing to back up when it has - scanned a token like "auto" and then the next character is - something other than a newline or a letter. Previously it - would then just match the "auto" rule and be done, but now - it has no "auto" rule, only a "auto\n" rule. To eliminate - the possibility of backing up, we could either duplicate all - - - -Version 2.5 Last change: April 1995 43 - - - - - - -FLEX(1) USER COMMANDS FLEX(1) - - - - rules but without final newlines, or, since we never expect - to encounter such an input and therefore don't how it's - classified, we can introduce one more catch-all rule, this - one which doesn't include a newline: - - %% - asm\n | - auto\n | - break\n | - ... etc ... - volatile\n | - while\n /* it's a keyword */ - - [a-z]+\n | - [a-z]+ | - .|\n /* it's not a keyword */ - - Compiled with -Cf, this is about as fast as one can get a - flex scanner to go for this particular problem. - - A final note: flex is slow when matching NUL's, particularly - when a token contains multiple NUL's. It's best to write - rules which match short amounts of text if it's anticipated - that the text will often include NUL's. - - Another final note regarding performance: as mentioned above - in the section How the Input is Matched, dynamically resiz- - ing yytext to accommodate huge tokens is a slow process - because it presently requires that the (huge) token be res- - canned from the beginning. Thus if performance is vital, - you should attempt to match "large" quantities of text but - not "huge" quantities, where the cutoff between the two is - at about 8K characters/token. - -GENERATING C++ SCANNERS - flex provides two different ways to generate scanners for - use with C++. The first way is to simply compile a scanner - generated by flex using a C++ compiler instead of a C com- - piler. You should not encounter any compilations errors - (please report any you find to the email address given in - the Author section below). You can then use C++ code in - your rule actions instead of C code. Note that the default - input source for your scanner remains yyin, and default - echoing is still done to yyout. Both of these remain FILE * - variables and not C++ streams. - - You can also use flex to generate a C++ scanner class, using - the -+ option (or, equivalently, %option c++), which is - automatically specified if the name of the flex executable - ends in a '+', such as flex++. When using this option, flex - defaults to generating the scanner to the file lex.yy.cc - instead of lex.yy.c. The generated scanner includes the - - - -Version 2.5 Last change: April 1995 44 - - - - - - -FLEX(1) USER COMMANDS FLEX(1) - - - - header file FlexLexer.h, which defines the interface to two - C++ classes. - - The first class, FlexLexer, provides an abstract base class - defining the general scanner class interface. It provides - the following member functions: - - const char* YYText() - returns the text of the most recently matched token, - the equivalent of yytext. - - int YYLeng() - returns the length of the most recently matched token, - the equivalent of yyleng. - - int lineno() const - returns the current input line number (see %option - yylineno), or 1 if %option yylineno was not used. - - void set_debug( int flag ) - sets the debugging flag for the scanner, equivalent to - assigning to yy_flex_debug (see the Options section - above). Note that you must build the scanner using - %option debug to include debugging information in it. - - int debug() const - returns the current setting of the debugging flag. - - Also provided are member functions equivalent to - yy_switch_to_buffer(), yy_create_buffer() (though the first - argument is an istream* object pointer and not a FILE*), - yy_flush_buffer(), yy_delete_buffer(), and yyrestart() - (again, the first argument is a istream* object pointer). - - The second class defined in FlexLexer.h is yyFlexLexer, - which is derived from FlexLexer. It defines the following - additional member functions: - - yyFlexLexer( istream* arg_yyin = 0, ostream* arg_yyout = 0 ) - constructs a yyFlexLexer object using the given streams - for input and output. If not specified, the streams - default to cin and cout, respectively. - - virtual int yylex() - performs the same role is yylex() does for ordinary - flex scanners: it scans the input stream, consuming - tokens, until a rule's action returns a value. If you - derive a subclass S from yyFlexLexer and want to access - the member functions and variables of S inside yylex(), - then you need to use %option yyclass="S" to inform flex - that you will be using that subclass instead of yyFlex- - Lexer. In this case, rather than generating - - - -Version 2.5 Last change: April 1995 45 - - - - - - -FLEX(1) USER COMMANDS FLEX(1) - - - - yyFlexLexer::yylex(), flex generates S::yylex() (and - also generates a dummy yyFlexLexer::yylex() that calls - yyFlexLexer::LexerError() if called). - - virtual void switch_streams(istream* new_in = 0, - ostream* new_out = 0) reassigns yyin to new_in (if - non-nil) and yyout to new_out (ditto), deleting the - previous input buffer if yyin is reassigned. - - int yylex( istream* new_in, ostream* new_out = 0 ) - first switches the input streams via switch_streams( - new_in, new_out ) and then returns the value of - yylex(). - - In addition, yyFlexLexer defines the following protected - virtual functions which you can redefine in derived classes - to tailor the scanner: - - virtual int LexerInput( char* buf, int max_size ) - reads up to max_size characters into buf and returns - the number of characters read. To indicate end-of- - input, return 0 characters. Note that "interactive" - scanners (see the -B and -I flags) define the macro - YY_INTERACTIVE. If you redefine LexerInput() and need - to take different actions depending on whether or not - the scanner might be scanning an interactive input - source, you can test for the presence of this name via - #ifdef. - - virtual void LexerOutput( const char* buf, int size ) - writes out size characters from the buffer buf, which, - while NUL-terminated, may also contain "internal" NUL's - if the scanner's rules can match text with NUL's in - them. - - virtual void LexerError( const char* msg ) - reports a fatal error message. The default version of - this function writes the message to the stream cerr and - exits. - - Note that a yyFlexLexer object contains its entire scanning - state. Thus you can use such objects to create reentrant - scanners. You can instantiate multiple instances of the - same yyFlexLexer class, and you can also combine multiple - C++ scanner classes together in the same program using the - -P option discussed above. - - Finally, note that the %array feature is not available to - C++ scanner classes; you must use %pointer (the default). - - Here is an example of a simple C++ scanner: - - - - -Version 2.5 Last change: April 1995 46 - - - - - - -FLEX(1) USER COMMANDS FLEX(1) - - - - // An example of using the flex C++ scanner class. - - %{ - int mylineno = 0; - %} - - string \"[^\n"]+\" - - ws [ \t]+ - - alpha [A-Za-z] - dig [0-9] - name ({alpha}|{dig}|\$)({alpha}|{dig}|[_.\-/$])* - num1 [-+]?{dig}+\.?([eE][-+]?{dig}+)? - num2 [-+]?{dig}*\.{dig}+([eE][-+]?{dig}+)? - number {num1}|{num2} - - %% - - {ws} /* skip blanks and tabs */ - - "/*" { - int c; - - while((c = yyinput()) != 0) - { - if(c == '\n') - ++mylineno; - - else if(c == '*') - { - if((c = yyinput()) == '/') - break; - else - unput(c); - } - } - } - - {number} cout << "number " << YYText() << '\n'; - - \n mylineno++; - - {name} cout << "name " << YYText() << '\n'; - - {string} cout << "string " << YYText() << '\n'; - - %% - - int main( int /* argc */, char** /* argv */ ) - { - FlexLexer* lexer = new yyFlexLexer; - - - -Version 2.5 Last change: April 1995 47 - - - - - - -FLEX(1) USER COMMANDS FLEX(1) - - - - while(lexer->yylex() != 0) - ; - return 0; - } - If you want to create multiple (different) lexer classes, - you use the -P flag (or the prefix= option) to rename each - yyFlexLexer to some other xxFlexLexer. You then can include - in your other sources once per lexer class, - first renaming yyFlexLexer as follows: - - #undef yyFlexLexer - #define yyFlexLexer xxFlexLexer - #include - - #undef yyFlexLexer - #define yyFlexLexer zzFlexLexer - #include - - if, for example, you used %option prefix="xx" for one of - your scanners and %option prefix="zz" for the other. - - IMPORTANT: the present form of the scanning class is experi- - mental and may change considerably between major releases. - -INCOMPATIBILITIES WITH LEX AND POSIX - flex is a rewrite of the AT&T Unix lex tool (the two imple- - mentations do not share any code, though), with some exten- - sions and incompatibilities, both of which are of concern to - those who wish to write scanners acceptable to either imple- - mentation. Flex is fully compliant with the POSIX lex - specification, except that when using %pointer (the - default), a call to unput() destroys the contents of yytext, - which is counter to the POSIX specification. - - In this section we discuss all of the known areas of incom- - patibility between flex, AT&T lex, and the POSIX specifica- - tion. - - flex's -l option turns on maximum compatibility with the - original AT&T lex implementation, at the cost of a major - loss in the generated scanner's performance. We note below - which incompatibilities can be overcome using the -l option. - - flex is fully compatible with lex with the following excep- - tions: - - - The undocumented lex scanner internal variable yylineno - is not supported unless -l or %option yylineno is used. - - yylineno should be maintained on a per-buffer basis, - rather than a per-scanner (single global variable) - basis. - - - -Version 2.5 Last change: April 1995 48 - - - - - - -FLEX(1) USER COMMANDS FLEX(1) - - - - yylineno is not part of the POSIX specification. - - - The input() routine is not redefinable, though it may - be called to read characters following whatever has - been matched by a rule. If input() encounters an end- - of-file the normal yywrap() processing is done. A - ``real'' end-of-file is returned by input() as EOF. - - Input is instead controlled by defining the YY_INPUT - macro. - - The flex restriction that input() cannot be redefined - is in accordance with the POSIX specification, which - simply does not specify any way of controlling the - scanner's input other than by making an initial assign- - ment to yyin. - - - The unput() routine is not redefinable. This restric- - tion is in accordance with POSIX. - - - flex scanners are not as reentrant as lex scanners. In - particular, if you have an interactive scanner and an - interrupt handler which long-jumps out of the scanner, - and the scanner is subsequently called again, you may - get the following message: - - fatal flex scanner internal error--end of buffer missed - - To reenter the scanner, first use - - yyrestart( yyin ); - - Note that this call will throw away any buffered input; - usually this isn't a problem with an interactive - scanner. - - Also note that flex C++ scanner classes are reentrant, - so if using C++ is an option for you, you should use - them instead. See "Generating C++ Scanners" above for - details. - - - output() is not supported. Output from the ECHO macro - is done to the file-pointer yyout (default stdout). - - output() is not part of the POSIX specification. - - - lex does not support exclusive start conditions (%x), - though they are in the POSIX specification. - - - When definitions are expanded, flex encloses them in - parentheses. With lex, the following: - - - - -Version 2.5 Last change: April 1995 49 - - - - - - -FLEX(1) USER COMMANDS FLEX(1) - - - - NAME [A-Z][A-Z0-9]* - %% - foo{NAME}? printf( "Found it\n" ); - %% - - will not match the string "foo" because when the macro - is expanded the rule is equivalent to "foo[A-Z][A-Z0- - 9]*?" and the precedence is such that the '?' is asso- - ciated with "[A-Z0-9]*". With flex, the rule will be - expanded to "foo([A-Z][A-Z0-9]*)?" and so the string - "foo" will match. - - Note that if the definition begins with ^ or ends with - $ then it is not expanded with parentheses, to allow - these operators to appear in definitions without losing - their special meanings. But the , /, and <> - operators cannot be used in a flex definition. - - Using -l results in the lex behavior of no parentheses - around the definition. - - The POSIX specification is that the definition be - enclosed in parentheses. - - - Some implementations of lex allow a rule's action to - begin on a separate line, if the rule's pattern has - trailing whitespace: - - %% - foo|bar - { foobar_action(); } - - flex does not support this feature. - - - The lex %r (generate a Ratfor scanner) option is not - supported. It is not part of the POSIX specification. - - - After a call to unput(), yytext is undefined until the - next token is matched, unless the scanner was built - using %array. This is not the case with lex or the - POSIX specification. The -l option does away with this - incompatibility. - - - The precedence of the {} (numeric range) operator is - different. lex interprets "abc{1,3}" as "match one, - two, or three occurrences of 'abc'", whereas flex - interprets it as "match 'ab' followed by one, two, or - three occurrences of 'c'". The latter is in agreement - with the POSIX specification. - - - The precedence of the ^ operator is different. lex - interprets "^foo|bar" as "match either 'foo' at the - - - -Version 2.5 Last change: April 1995 50 - - - - - - -FLEX(1) USER COMMANDS FLEX(1) - - - - beginning of a line, or 'bar' anywhere", whereas flex - interprets it as "match either 'foo' or 'bar' if they - come at the beginning of a line". The latter is in - agreement with the POSIX specification. - - - The special table-size declarations such as %a sup- - ported by lex are not required by flex scanners; flex - ignores them. - - - The name FLEX_SCANNER is #define'd so scanners may be - written for use with either flex or lex. Scanners also - include YY_FLEX_MAJOR_VERSION and YY_FLEX_MINOR_VERSION - indicating which version of flex generated the scanner - (for example, for the 2.5 release, these defines would - be 2 and 5 respectively). - - The following flex features are not included in lex or the - POSIX specification: - - C++ scanners - %option - start condition scopes - start condition stacks - interactive/non-interactive scanners - yy_scan_string() and friends - yyterminate() - yy_set_interactive() - yy_set_bol() - YY_AT_BOL() - <> - <*> - YY_DECL - YY_START - YY_USER_ACTION - YY_USER_INIT - #line directives - %{}'s around actions - multiple actions on a line - - plus almost all of the flex flags. The last feature in the - list refers to the fact that with flex you can put multiple - actions on the same line, separated with semi-colons, while - with lex, the following - - foo handle_foo(); ++num_foos_seen; - - is (rather surprisingly) truncated to - - foo handle_foo(); - - flex does not truncate the action. Actions that are not - enclosed in braces are simply terminated at the end of the - - - -Version 2.5 Last change: April 1995 51 - - - - - - -FLEX(1) USER COMMANDS FLEX(1) - - - - line. - -DIAGNOSTICS - warning, rule cannot be matched indicates that the given - rule cannot be matched because it follows other rules that - will always match the same text as it. For example, in the - following "foo" cannot be matched because it comes after an - identifier "catch-all" rule: - - [a-z]+ got_identifier(); - foo got_foo(); - - Using REJECT in a scanner suppresses this warning. - - warning, -s option given but default rule can be matched - means that it is possible (perhaps only in a particular - start condition) that the default rule (match any single - character) is the only one that will match a particular - input. Since -s was given, presumably this is not intended. - - reject_used_but_not_detected undefined or - yymore_used_but_not_detected undefined - These errors can - occur at compile time. They indicate that the scanner uses - REJECT or yymore() but that flex failed to notice the fact, - meaning that flex scanned the first two sections looking for - occurrences of these actions and failed to find any, but - somehow you snuck some in (via a #include file, for exam- - ple). Use %option reject or %option yymore to indicate to - flex that you really do use these features. - - flex scanner jammed - a scanner compiled with -s has encoun- - tered an input string which wasn't matched by any of its - rules. This error can also occur due to internal problems. - - token too large, exceeds YYLMAX - your scanner uses %array - and one of its rules matched a string longer than the YYLMAX - constant (8K bytes by default). You can increase the value - by #define'ing YYLMAX in the definitions section of your - flex input. - - scanner requires -8 flag to use the character 'x' - Your - scanner specification includes recognizing the 8-bit charac- - ter 'x' and you did not specify the -8 flag, and your - scanner defaulted to 7-bit because you used the -Cf or -CF - table compression options. See the discussion of the -7 - flag for details. - - flex scanner push-back overflow - you used unput() to push - back so much text that the scanner's buffer could not hold - both the pushed-back text and the current token in yytext. - Ideally the scanner should dynamically resize the buffer in - this case, but at present it does not. - - - -Version 2.5 Last change: April 1995 52 - - - - - - -FLEX(1) USER COMMANDS FLEX(1) - - - - input buffer overflow, can't enlarge buffer because scanner - uses REJECT - the scanner was working on matching an - extremely large token and needed to expand the input buffer. - This doesn't work with scanners that use REJECT. - - fatal flex scanner internal error--end of buffer missed - - This can occur in an scanner which is reentered after a - long-jump has jumped out (or over) the scanner's activation - frame. Before reentering the scanner, use: - - yyrestart( yyin ); - - or, as noted above, switch to using the C++ scanner class. - - too many start conditions in <> you listed more start condi- - tions in a <> construct than exist (so you must have listed - at least one of them twice). - -FILES - -lfl library with which scanners must be linked. - - lex.yy.c - generated scanner (called lexyy.c on some systems). - - lex.yy.cc - generated C++ scanner class, when using -+. - - - header file defining the C++ scanner base class, Flex- - Lexer, and its derived class, yyFlexLexer. - - flex.skl - skeleton scanner. This file is only used when building - flex, not when flex executes. - - lex.backup - backing-up information for -b flag (called lex.bck on - some systems). - -DEFICIENCIES / BUGS - Some trailing context patterns cannot be properly matched - and generate warning messages ("dangerous trailing con- - text"). These are patterns where the ending of the first - part of the rule matches the beginning of the second part, - such as "zx*/xy*", where the 'x*' matches the 'x' at the - beginning of the trailing context. (Note that the POSIX - draft states that the text matched by such patterns is unde- - fined.) - - For some trailing context rules, parts which are actually - fixed-length are not recognized as such, leading to the - abovementioned performance loss. In particular, parts using - - - -Version 2.5 Last change: April 1995 53 - - - - - - -FLEX(1) USER COMMANDS FLEX(1) - - - - '|' or {n} (such as "foo{3}") are always considered - variable-length. - - Combining trailing context with the special '|' action can - result in fixed trailing context being turned into the more - expensive variable trailing context. For example, in the - following: - - %% - abc | - xyz/def - - - Use of unput() invalidates yytext and yyleng, unless the - %array directive or the -l option has been used. - - Pattern-matching of NUL's is substantially slower than - matching other characters. - - Dynamic resizing of the input buffer is slow, as it entails - rescanning all the text matched so far by the current (gen- - erally huge) token. - - Due to both buffering of input and read-ahead, you cannot - intermix calls to routines, such as, for example, - getchar(), with flex rules and expect it to work. Call - input() instead. - - The total table entries listed by the -v flag excludes the - number of table entries needed to determine what rule has - been matched. The number of entries is equal to the number - of DFA states if the scanner does not use REJECT, and some- - what greater than the number of states if it does. - - REJECT cannot be used with the -f or -F options. - - The flex internal algorithms need documentation. - -SEE ALSO - lex(1), yacc(1), sed(1), awk(1). - - John Levine, Tony Mason, and Doug Brown, Lex & Yacc, - O'Reilly and Associates. Be sure to get the 2nd edition. - - M. E. Lesk and E. Schmidt, LEX - Lexical Analyzer Generator - - Alfred Aho, Ravi Sethi and Jeffrey Ullman, Compilers: Prin- - ciples, Techniques and Tools, Addison-Wesley (1986). - Describes the pattern-matching techniques used by flex - (deterministic finite automata). - - - - - -Version 2.5 Last change: April 1995 54 - - - - - - -FLEX(1) USER COMMANDS FLEX(1) - - - -AUTHOR - Vern Paxson, with the help of many ideas and much inspira- - tion from Van Jacobson. Original version by Jef Poskanzer. - The fast table representation is a partial implementation of - a design done by Van Jacobson. The implementation was done - by Kevin Gong and Vern Paxson. - - Thanks to the many flex beta-testers, feedbackers, and con- - tributors, especially Francois Pinard, Casey Leedom, Robert - Abramovitz, Stan Adermann, Terry Allen, David Barker- - Plummer, John Basrai, Neal Becker, Nelson H.F. Beebe, - benson@odi.com, Karl Berry, Peter A. Bigot, Simon Blanchard, - Keith Bostic, Frederic Brehm, Ian Brockbank, Kin Cho, Nick - Christopher, Brian Clapper, J.T. Conklin, Jason Coughlin, - Bill Cox, Nick Cropper, Dave Curtis, Scott David Daniels, - Chris G. Demetriou, Theo Deraadt, Mike Donahue, Chuck - Doucette, Tom Epperly, Leo Eskin, Chris Faylor, Chris - Flatters, Jon Forrest, Jeffrey Friedl, Joe Gayda, Kaveh R. - Ghazi, Wolfgang Glunz, Eric Goldman, Christopher M. Gould, - Ulrich Grepel, Peer Griebel, Jan Hajic, Charles Hemphill, - NORO Hideo, Jarkko Hietaniemi, Scott Hofmann, Jeff Honig, - Dana Hudes, Eric Hughes, John Interrante, Ceriel Jacobs, - Michal Jaegermann, Sakari Jalovaara, Jeffrey R. Jones, Henry - Juengst, Klaus Kaempf, Jonathan I. Kamens, Terrence O Kane, - Amir Katz, ken@ken.hilco.com, Kevin B. Kenny, Steve Kirsch, - Winfried Koenig, Marq Kole, Ronald Lamprecht, Greg Lee, - Rohan Lenard, Craig Leres, John Levine, Steve Liddle, David - Loffredo, Mike Long, Mohamed el Lozy, Brian Madsen, Malte, - Joe Marshall, Bengt Martensson, Chris Metcalf, Luke Mewburn, - Jim Meyering, R. Alexander Milowski, Erik Naggum, G.T. - Nicol, Landon Noll, James Nordby, Marc Nozell, Richard - Ohnemus, Karsten Pahnke, Sven Panne, Roland Pesch, Walter - Pelissero, Gaumond Pierre, Esmond Pitt, Jef Poskanzer, Joe - Rahmeh, Jarmo Raiha, Frederic Raimbault, Pat Rankin, Rick - Richardson, Kevin Rodgers, Kai Uwe Rommel, Jim Roskind, - Alberto Santini, Andreas Scherer, Darrell Schiebel, Raf - Schietekat, Doug Schmidt, Philippe Schnoebelen, Andreas - Schwab, Larry Schwimmer, Alex Siegel, Eckehard Stolz, Jan- - Erik Strvmquist, Mike Stump, Paul Stuart, Dave Tallman, Ian - Lance Taylor, Chris Thewalt, Richard M. Timoney, Jodi Tsai, - Paul Tuinenga, Gary Weik, Frank Whaley, Gerhard Wilhelms, - Kent Williams, Ken Yap, Ron Zellar, Nathan Zelle, David - Zuhn, and those whose names have slipped my marginal mail- - archiving skills but whose contributions are appreciated all - the same. - - Thanks to Keith Bostic, Jon Forrest, Noah Friedman, John - Gilmore, Craig Leres, John Levine, Bob Mulcahy, G.T. Nicol, - Francois Pinard, Rich Salz, and Richard Stallman for help - with various distribution headaches. - - - - - -Version 2.5 Last change: April 1995 55 - - - - - - -FLEX(1) USER COMMANDS FLEX(1) - - - - Thanks to Esmond Pitt and Earle Horton for 8-bit character - support; to Benson Margulies and Fred Burke for C++ support; - to Kent Williams and Tom Epperly for C++ class support; to - Ove Ewerlid for support of NUL's; and to Eric Hughes for - support of multiple buffers. - - This work was primarily done when I was with the Real Time - Systems Group at the Lawrence Berkeley Laboratory in Berke- - ley, CA. Many thanks to all there for the support I - received. - - Send comments to vern@ee.lbl.gov. - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -Version 2.5 Last change: April 1995 56 - - - diff --git a/commands/flex-2.5.4/MISC/parse.c b/commands/flex-2.5.4/MISC/parse.c deleted file mode 100644 index f5f1d80f5..000000000 --- a/commands/flex-2.5.4/MISC/parse.c +++ /dev/null @@ -1,1452 +0,0 @@ -#ifndef lint -static char yysccsid[] = "@(#)yaccpar 1.9 (Berkeley) 02/21/93"; -#endif -#define YYBYACC 1 -#define YYMAJOR 1 -#define YYMINOR 9 -#define yyclearin (yychar=(-1)) -#define yyerrok (yyerrflag=0) -#define YYRECOVERING (yyerrflag!=0) -#define YYPREFIX "yy" -#line 10 "./parse.y" -/*- - * Copyright (c) 1990 The Regents of the University of California. - * All rights reserved. - * - * This code is derived from software contributed to Berkeley by - * Vern Paxson. - * - * The United States Government has rights in this work pursuant - * to contract no. DE-AC03-76SF00098 between the United States - * Department of Energy and the University of California. - * - * Redistribution and use in source and binary forms with or without - * modification are permitted provided that: (1) source distributions retain - * this entire copyright notice and comment, and (2) distributions including - * binaries display the following acknowledgement: ``This product includes - * software developed by the University of California, Berkeley and its - * contributors'' in the documentation or other materials provided with the - * distribution and in all advertising materials mentioning features or use - * of this software. Neither the name of the University nor the names of - * its contributors may be used to endorse or promote products derived from - * this software without specific prior written permission. - * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED - * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF - * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. - */ - -/* $Header$ */ - - -/* Some versions of bison are broken in that they use alloca() but don't - * declare it properly. The following is the patented (just kidding!) - * #ifdef chud to fix the problem, courtesy of Francois Pinard. - */ -#ifdef YYBISON -/* AIX requires this to be the first thing in the file. What a piece. */ -# ifdef _AIX - #pragma alloca -# endif -#endif - -#include "flexdef.h" - -/* The remainder of the alloca() cruft has to come after including flexdef.h, - * so HAVE_ALLOCA_H is (possibly) defined. - */ -#ifdef YYBISON -# ifdef __GNUC__ -# ifndef alloca -# define alloca __builtin_alloca -# endif -# else -# if HAVE_ALLOCA_H -# include -# else -# ifdef __hpux -void *alloca (); -# else -# ifdef __TURBOC__ -# include -# else -char *alloca (); -# endif -# endif -# endif -# endif -#endif - -/* Bletch, ^^^^ that was ugly! */ - - -int pat, scnum, eps, headcnt, trailcnt, anyccl, lastchar, i, rulelen; -int trlcontxt, xcluflg, currccl, cclsorted, varlength, variable_trail_rule; - -int *scon_stk; -int scon_stk_ptr; - -static int madeany = false; /* whether we've made the '.' character class */ -int previous_continued_action; /* whether the previous rule's action was '|' */ - -/* Expand a POSIX character class expression. */ -#define CCL_EXPR(func) \ - { \ - int c; \ - for ( c = 0; c < csize; ++c ) \ - if ( isascii(c) && func(c) ) \ - ccladd( currccl, c ); \ - } - -/* While POSIX defines isblank(), it's not ANSI C. */ -#define IS_BLANK(c) ((c) == ' ' || (c) == '\t') - -/* On some over-ambitious machines, such as DEC Alpha's, the default - * token type is "long" instead of "int"; this leads to problems with - * declaring yylval in flexdef.h. But so far, all the yacc's I've seen - * wrap their definitions of YYSTYPE with "#ifndef YYSTYPE"'s, so the - * following should ensure that the default token type is "int". - */ -#define YYSTYPE int - -#line 112 "y.tab.c" -#define CHAR 257 -#define NUMBER 258 -#define SECTEND 259 -#define SCDECL 260 -#define XSCDECL 261 -#define NAME 262 -#define PREVCCL 263 -#define EOF_OP 264 -#define OPTION_OP 265 -#define OPT_OUTFILE 266 -#define OPT_PREFIX 267 -#define OPT_YYCLASS 268 -#define CCE_ALNUM 269 -#define CCE_ALPHA 270 -#define CCE_BLANK 271 -#define CCE_CNTRL 272 -#define CCE_DIGIT 273 -#define CCE_GRAPH 274 -#define CCE_LOWER 275 -#define CCE_PRINT 276 -#define CCE_PUNCT 277 -#define CCE_SPACE 278 -#define CCE_UPPER 279 -#define CCE_XDIGIT 280 -#define YYERRCODE 256 -short yylhs[] = { -1, - 0, 1, 2, 2, 2, 2, 3, 6, 6, 7, - 7, 7, 8, 9, 9, 10, 10, 10, 4, 4, - 4, 5, 12, 12, 12, 12, 14, 11, 11, 11, - 15, 15, 15, 16, 13, 13, 13, 13, 18, 18, - 17, 19, 19, 20, 20, 20, 20, 20, 20, 20, - 20, 20, 20, 20, 20, 21, 21, 23, 23, 23, - 23, 24, 24, 24, 24, 24, 24, 24, 24, 24, - 24, 24, 24, 22, 22, -}; -short yylen[] = { 2, - 5, 0, 3, 2, 0, 1, 1, 1, 1, 2, - 1, 1, 2, 2, 0, 3, 3, 3, 5, 5, - 0, 0, 2, 1, 1, 1, 0, 4, 3, 0, - 3, 1, 1, 1, 2, 3, 2, 1, 3, 1, - 2, 2, 1, 2, 2, 2, 6, 5, 4, 1, - 1, 1, 3, 3, 1, 3, 4, 4, 2, 2, - 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, - 1, 1, 1, 2, 0, -}; -short yydefred[] = { 2, - 0, 0, 6, 0, 7, 8, 9, 15, 21, 0, - 4, 0, 0, 12, 11, 0, 0, 0, 0, 14, - 0, 1, 0, 10, 0, 0, 0, 0, 0, 21, - 0, 16, 17, 18, 29, 33, 34, 0, 32, 0, - 26, 55, 52, 25, 0, 50, 75, 0, 0, 0, - 24, 0, 0, 0, 0, 51, 28, 0, 20, 23, - 0, 0, 61, 0, 19, 0, 37, 0, 41, 0, - 0, 44, 45, 46, 31, 74, 53, 54, 0, 0, - 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, - 72, 73, 56, 60, 36, 0, 0, 57, 0, 49, - 0, 58, 0, 48, 47, -}; -short yydgoto[] = { 1, - 2, 4, 9, 13, 22, 10, 16, 11, 12, 20, - 23, 50, 51, 29, 38, 39, 52, 53, 54, 55, - 56, 61, 64, 94, -}; -short yysindex[] = { 0, - 0, -235, 0, -191, 0, 0, 0, 0, 0, -207, - 0, -215, -18, 0, 0, -202, 4, 26, 32, 0, - 41, 0, -35, 0, -168, -166, -165, 38, -180, 0, - -30, 0, 0, 0, 0, 0, 0, -16, 0, -40, - 0, 0, 0, 0, -2, 0, 0, -2, 8, 93, - 0, -2, -25, -2, 15, 0, 0, -153, 0, 0, - -27, -26, 0, -88, 0, -23, 0, -2, 0, 15, - -150, 0, 0, 0, 0, 0, 0, 0, -3, 65, - 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 0, -2, -21, 0, -145, 0, - -116, 0, -12, 0, 0, -}; -short yyrindex[] = { 0, - 0, -188, 0, 0, 0, 0, 0, 0, 0, 0, - 0, -154, 1, 0, 0, -140, 0, 0, 0, 0, - -176, 0, -28, 0, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 0, 0, 0, 0, 0, -32, - 0, 0, 0, 0, 0, 0, 0, 0, 22, 0, - 0, 0, 106, 7, -10, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 0, 108, 0, 0, 0, -7, - 0, 0, 0, 0, 0, 0, 0, 0, 0, 46, - 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 0, 9, 0, 0, 0, 0, - 0, 0, 0, 0, 0, -}; -short yygindex[] = { 0, - 0, 0, 0, 92, 100, 0, 0, 0, 0, 0, - 0, 0, 81, 0, 0, 69, 0, 27, 60, -29, - 0, 0, 66, 0, -}; -#define YYTABLESIZE 326 -short yytable[] = { 43, - 22, 30, 42, 47, 93, 22, 77, 30, 104, 48, - 67, 22, 95, 30, 78, 46, 40, 22, 39, 21, - 3, 69, 101, 43, 70, 43, 42, 58, 42, 43, - 43, 47, 42, 42, 30, 43, 43, 48, 42, 42, - 30, 21, 40, 46, 39, 57, 30, 40, 14, 39, - 17, 18, 19, 40, 15, 39, 72, 73, 30, 24, - 49, 30, 22, 45, 25, 22, 70, 5, 6, 7, - 5, 5, 5, 8, 62, 36, 5, 74, 66, 27, - 43, 37, 28, 42, 59, 27, 26, 30, 49, 98, - 30, 30, 27, 32, 30, 33, 34, 68, 68, 35, - 68, 63, 65, 100, 13, 13, 13, 97, 37, 99, - 13, 102, 105, 43, 61, 38, 42, 35, 3, 3, - 3, 40, 31, 30, 3, 60, 75, 96, 79, 0, - 40, 0, 39, 0, 0, 0, 0, 71, 59, 0, - 0, 103, 0, 0, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 0, 0, 0, 0, 80, 0, - 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, - 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, - 91, 92, 0, 0, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 30, 30, 41, 42, 22, 22, 76, - 30, 30, 43, 44, 22, 22, 0, 0, 0, 0, - 0, 0, 0, 0, 0, 0, 43, 0, 0, 42, - 0, 0, 43, 80, 42, 42, 30, 30, 0, 0, - 43, 0, 0, 30, 30, 81, 82, 83, 84, 85, - 86, 87, 88, 89, 90, 91, 92, 0, 61, 0, - 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, - 61, 61, 61, 61, 61, 61, 61, 61, 61, 61, - 61, 61, 59, 0, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 59, 59, 59, 59, 59, 59, - 59, 59, 59, 59, 59, 59, -}; -short yycheck[] = { 10, - 0, 34, 10, 34, 93, 34, 34, 40, 125, 40, - 36, 40, 36, 46, 41, 46, 10, 46, 10, 60, - 256, 47, 44, 34, 54, 36, 34, 44, 36, 40, - 41, 34, 40, 41, 34, 46, 47, 40, 46, 47, - 40, 60, 36, 46, 36, 62, 46, 41, 256, 41, - 266, 267, 268, 47, 262, 47, 42, 43, 91, 262, - 91, 94, 91, 94, 61, 94, 96, 259, 260, 261, - 259, 260, 261, 265, 48, 256, 265, 63, 52, 256, - 91, 262, 42, 91, 125, 262, 61, 123, 91, 93, - 123, 91, 61, 262, 94, 262, 262, 124, 124, 62, - 124, 94, 10, 125, 259, 260, 261, 258, 262, 45, - 265, 257, 125, 124, 93, 10, 124, 10, 259, 260, - 261, 30, 23, 123, 265, 45, 58, 68, 63, -1, - 124, -1, 124, -1, -1, -1, -1, 123, 93, -1, - -1, 258, -1, -1, -1, -1, -1, -1, -1, -1, - -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, - -1, -1, -1, -1, -1, -1, -1, -1, 257, -1, - -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, - 269, 270, 271, 272, 273, 274, 275, 276, 277, 278, - 279, 280, -1, -1, -1, -1, -1, -1, -1, -1, - -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, - -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, - -1, -1, -1, 256, 257, 256, 257, 256, 257, 257, - 263, 264, 263, 264, 263, 264, -1, -1, -1, -1, - -1, -1, -1, -1, -1, -1, 257, -1, -1, 257, - -1, -1, 263, 257, 257, 263, 256, 257, -1, -1, - 263, -1, -1, 263, 264, 269, 270, 271, 272, 273, - 274, 275, 276, 277, 278, 279, 280, -1, 257, -1, - -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, - 269, 270, 271, 272, 273, 274, 275, 276, 277, 278, - 279, 280, 257, -1, -1, -1, -1, -1, -1, -1, - -1, -1, -1, -1, 269, 270, 271, 272, 273, 274, - 275, 276, 277, 278, 279, 280, -}; -#define YYFINAL 1 -#ifndef YYDEBUG -#define YYDEBUG 0 -#endif -#define YYMAXTOKEN 280 -#if YYDEBUG -char *yyname[] = { -"end-of-file",0,0,0,0,0,0,0,0,0,"'\\n'",0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, -0,0,0,"'\"'",0,"'$'",0,0,0,"'('","')'","'*'","'+'","','","'-'","'.'","'/'",0,0, -0,0,0,0,0,0,0,0,0,0,"'<'","'='","'>'","'?'",0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0,"'['",0,"']'","'^'",0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,"'{'","'|'","'}'",0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, -0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,"CHAR","NUMBER","SECTEND", -"SCDECL","XSCDECL","NAME","PREVCCL","EOF_OP","OPTION_OP","OPT_OUTFILE", -"OPT_PREFIX","OPT_YYCLASS","CCE_ALNUM","CCE_ALPHA","CCE_BLANK","CCE_CNTRL", -"CCE_DIGIT","CCE_GRAPH","CCE_LOWER","CCE_PRINT","CCE_PUNCT","CCE_SPACE", -"CCE_UPPER","CCE_XDIGIT", -}; -char *yyrule[] = { -"$accept : goal", -"goal : initlex sect1 sect1end sect2 initforrule", -"initlex :", -"sect1 : sect1 startconddecl namelist1", -"sect1 : sect1 options", -"sect1 :", -"sect1 : error", -"sect1end : SECTEND", -"startconddecl : SCDECL", -"startconddecl : XSCDECL", -"namelist1 : namelist1 NAME", -"namelist1 : NAME", -"namelist1 : error", -"options : OPTION_OP optionlist", -"optionlist : optionlist option", -"optionlist :", -"option : OPT_OUTFILE '=' NAME", -"option : OPT_PREFIX '=' NAME", -"option : OPT_YYCLASS '=' NAME", -"sect2 : sect2 scon initforrule flexrule '\\n'", -"sect2 : sect2 scon '{' sect2 '}'", -"sect2 :", -"initforrule :", -"flexrule : '^' rule", -"flexrule : rule", -"flexrule : EOF_OP", -"flexrule : error", -"scon_stk_ptr :", -"scon : '<' scon_stk_ptr namelist2 '>'", -"scon : '<' '*' '>'", -"scon :", -"namelist2 : namelist2 ',' sconname", -"namelist2 : sconname", -"namelist2 : error", -"sconname : NAME", -"rule : re2 re", -"rule : re2 re '$'", -"rule : re '$'", -"rule : re", -"re : re '|' series", -"re : series", -"re2 : re '/'", -"series : series singleton", -"series : singleton", -"singleton : singleton '*'", -"singleton : singleton '+'", -"singleton : singleton '?'", -"singleton : singleton '{' NUMBER ',' NUMBER '}'", -"singleton : singleton '{' NUMBER ',' '}'", -"singleton : singleton '{' NUMBER '}'", -"singleton : '.'", -"singleton : fullccl", -"singleton : PREVCCL", -"singleton : '\"' string '\"'", -"singleton : '(' re ')'", -"singleton : CHAR", -"fullccl : '[' ccl ']'", -"fullccl : '[' '^' ccl ']'", -"ccl : ccl CHAR '-' CHAR", -"ccl : ccl CHAR", -"ccl : ccl ccl_expr", -"ccl :", -"ccl_expr : CCE_ALNUM", -"ccl_expr : CCE_ALPHA", -"ccl_expr : CCE_BLANK", -"ccl_expr : CCE_CNTRL", -"ccl_expr : CCE_DIGIT", -"ccl_expr : CCE_GRAPH", -"ccl_expr : CCE_LOWER", -"ccl_expr : CCE_PRINT", -"ccl_expr : CCE_PUNCT", -"ccl_expr : CCE_SPACE", -"ccl_expr : CCE_UPPER", -"ccl_expr : CCE_XDIGIT", -"string : string CHAR", -"string :", -}; -#endif -#ifndef YYSTYPE -typedef int YYSTYPE; -#endif -#ifdef YYSTACKSIZE -#undef YYMAXDEPTH -#define YYMAXDEPTH YYSTACKSIZE -#else -#ifdef YYMAXDEPTH -#define YYSTACKSIZE YYMAXDEPTH -#else -#define YYSTACKSIZE 500 -#define YYMAXDEPTH 500 -#endif -#endif -int yydebug; -int yynerrs; -int yyerrflag; -int yychar; -short *yyssp; -YYSTYPE *yyvsp; -YYSTYPE yyval; -YYSTYPE yylval; -short yyss[YYSTACKSIZE]; -YYSTYPE yyvs[YYSTACKSIZE]; -#define yystacksize YYSTACKSIZE -#line 776 "./parse.y" - - -/* build_eof_action - build the "<>" action for the active start - * conditions - */ - -void build_eof_action() - { - register int i; - char action_text[MAXLINE]; - - for ( i = 1; i <= scon_stk_ptr; ++i ) - { - if ( sceof[scon_stk[i]] ) - format_pinpoint_message( - "multiple <> rules for start condition %s", - scname[scon_stk[i]] ); - - else - { - sceof[scon_stk[i]] = true; - sprintf( action_text, "case YY_STATE_EOF(%s):\n", - scname[scon_stk[i]] ); - add_action( action_text ); - } - } - - line_directive_out( (FILE *) 0, 1 ); - - /* This isn't a normal rule after all - don't count it as - * such, so we don't have any holes in the rule numbering - * (which make generating "rule can never match" warnings - * more difficult. - */ - --num_rules; - ++num_eof_rules; - } - - -/* format_synerr - write out formatted syntax error */ - -void format_synerr( msg, arg ) -char msg[], arg[]; - { - char errmsg[MAXLINE]; - - (void) sprintf( errmsg, msg, arg ); - synerr( errmsg ); - } - - -/* synerr - report a syntax error */ - -void synerr( str ) -char str[]; - { - syntaxerror = true; - pinpoint_message( str ); - } - - -/* format_warn - write out formatted warning */ - -void format_warn( msg, arg ) -char msg[], arg[]; - { - char warn_msg[MAXLINE]; - - (void) sprintf( warn_msg, msg, arg ); - warn( warn_msg ); - } - - -/* warn - report a warning, unless -w was given */ - -void warn( str ) -char str[]; - { - line_warning( str, linenum ); - } - -/* format_pinpoint_message - write out a message formatted with one string, - * pinpointing its location - */ - -void format_pinpoint_message( msg, arg ) -char msg[], arg[]; - { - char errmsg[MAXLINE]; - - (void) sprintf( errmsg, msg, arg ); - pinpoint_message( errmsg ); - } - - -/* pinpoint_message - write out a message, pinpointing its location */ - -void pinpoint_message( str ) -char str[]; - { - line_pinpoint( str, linenum ); - } - - -/* line_warning - report a warning at a given line, unless -w was given */ - -void line_warning( str, line ) -char str[]; -int line; - { - char warning[MAXLINE]; - - if ( ! nowarn ) - { - sprintf( warning, "warning, %s", str ); - line_pinpoint( warning, line ); - } - } - - -/* line_pinpoint - write out a message, pinpointing it at the given line */ - -void line_pinpoint( str, line ) -char str[]; -int line; - { - fprintf( stderr, "\"%s\", line %d: %s\n", infilename, line, str ); - } - - -/* yyerror - eat up an error message from the parser; - * currently, messages are ignore - */ - -void yyerror( msg ) -char msg[]; - { - } -#line 541 "y.tab.c" -#define YYABORT goto yyabort -#define YYREJECT goto yyabort -#define YYACCEPT goto yyaccept -#define YYERROR goto yyerrlab -int -yyparse() -{ - register int yym, yyn, yystate; -#if YYDEBUG - register char *yys; - extern char *getenv(); - - if (yys = getenv("YYDEBUG")) - { - yyn = *yys; - if (yyn >= '0' && yyn <= '9') - yydebug = yyn - '0'; - } -#endif - - yynerrs = 0; - yyerrflag = 0; - yychar = (-1); - - yyssp = yyss; - yyvsp = yyvs; - *yyssp = yystate = 0; - -yyloop: - if (yyn = yydefred[yystate]) goto yyreduce; - if (yychar < 0) - { - if ((yychar = yylex()) < 0) yychar = 0; -#if YYDEBUG - if (yydebug) - { - yys = 0; - if (yychar <= YYMAXTOKEN) yys = yyname[yychar]; - if (!yys) yys = "illegal-symbol"; - printf("%sdebug: state %d, reading %d (%s)\n", - YYPREFIX, yystate, yychar, yys); - } -#endif - } - if ((yyn = yysindex[yystate]) && (yyn += yychar) >= 0 && - yyn <= YYTABLESIZE && yycheck[yyn] == yychar) - { -#if YYDEBUG - if (yydebug) - printf("%sdebug: state %d, shifting to state %d\n", - YYPREFIX, yystate, yytable[yyn]); -#endif - if (yyssp >= yyss + yystacksize - 1) - { - goto yyoverflow; - } - *++yyssp = yystate = yytable[yyn]; - *++yyvsp = yylval; - yychar = (-1); - if (yyerrflag > 0) --yyerrflag; - goto yyloop; - } - if ((yyn = yyrindex[yystate]) && (yyn += yychar) >= 0 && - yyn <= YYTABLESIZE && yycheck[yyn] == yychar) - { - yyn = yytable[yyn]; - goto yyreduce; - } - if (yyerrflag) goto yyinrecovery; -#ifdef lint - goto yynewerror; -#endif -yynewerror: - yyerror("syntax error"); -#ifdef lint - goto yyerrlab; -#endif -yyerrlab: - ++yynerrs; -yyinrecovery: - if (yyerrflag < 3) - { - yyerrflag = 3; - for (;;) - { - if ((yyn = yysindex[*yyssp]) && (yyn += YYERRCODE) >= 0 && - yyn <= YYTABLESIZE && yycheck[yyn] == YYERRCODE) - { -#if YYDEBUG - if (yydebug) - printf("%sdebug: state %d, error recovery shifting\ - to state %d\n", YYPREFIX, *yyssp, yytable[yyn]); -#endif - if (yyssp >= yyss + yystacksize - 1) - { - goto yyoverflow; - } - *++yyssp = yystate = yytable[yyn]; - *++yyvsp = yylval; - goto yyloop; - } - else - { -#if YYDEBUG - if (yydebug) - printf("%sdebug: error recovery discarding state %d\n", - YYPREFIX, *yyssp); -#endif - if (yyssp <= yyss) goto yyabort; - --yyssp; - --yyvsp; - } - } - } - else - { - if (yychar == 0) goto yyabort; -#if YYDEBUG - if (yydebug) - { - yys = 0; - if (yychar <= YYMAXTOKEN) yys = yyname[yychar]; - if (!yys) yys = "illegal-symbol"; - printf("%sdebug: state %d, error recovery discards token %d (%s)\n", - YYPREFIX, yystate, yychar, yys); - } -#endif - yychar = (-1); - goto yyloop; - } -yyreduce: -#if YYDEBUG - if (yydebug) - printf("%sdebug: state %d, reducing by rule %d (%s)\n", - YYPREFIX, yystate, yyn, yyrule[yyn]); -#endif - yym = yylen[yyn]; - yyval = yyvsp[1-yym]; - switch (yyn) - { -case 1: -#line 113 "./parse.y" -{ /* add default rule */ - int def_rule; - - pat = cclinit(); - cclnegate( pat ); - - def_rule = mkstate( -pat ); - - /* Remember the number of the default rule so we - * don't generate "can't match" warnings for it. - */ - default_rule = num_rules; - - finish_rule( def_rule, false, 0, 0 ); - - for ( i = 1; i <= lastsc; ++i ) - scset[i] = mkbranch( scset[i], def_rule ); - - if ( spprdflt ) - add_action( - "YY_FATAL_ERROR( \"flex scanner jammed\" )" ); - else - add_action( "ECHO" ); - - add_action( ";\n\tYY_BREAK\n" ); - } -break; -case 2: -#line 142 "./parse.y" -{ /* initialize for processing rules */ - - /* Create default DFA start condition. */ - scinstal( "INITIAL", false ); - } -break; -case 6: -#line 153 "./parse.y" -{ synerr( "unknown error processing section 1" ); } -break; -case 7: -#line 157 "./parse.y" -{ - check_options(); - scon_stk = allocate_integer_array( lastsc + 1 ); - scon_stk_ptr = 0; - } -break; -case 8: -#line 165 "./parse.y" -{ xcluflg = false; } -break; -case 9: -#line 168 "./parse.y" -{ xcluflg = true; } -break; -case 10: -#line 172 "./parse.y" -{ scinstal( nmstr, xcluflg ); } -break; -case 11: -#line 175 "./parse.y" -{ scinstal( nmstr, xcluflg ); } -break; -case 12: -#line 178 "./parse.y" -{ synerr( "bad start condition list" ); } -break; -case 16: -#line 189 "./parse.y" -{ - outfilename = copy_string( nmstr ); - did_outfilename = 1; - } -break; -case 17: -#line 194 "./parse.y" -{ prefix = copy_string( nmstr ); } -break; -case 18: -#line 196 "./parse.y" -{ yyclass = copy_string( nmstr ); } -break; -case 19: -#line 200 "./parse.y" -{ scon_stk_ptr = yyvsp[-3]; } -break; -case 20: -#line 202 "./parse.y" -{ scon_stk_ptr = yyvsp[-3]; } -break; -case 22: -#line 207 "./parse.y" -{ - /* Initialize for a parse of one rule. */ - trlcontxt = variable_trail_rule = varlength = false; - trailcnt = headcnt = rulelen = 0; - current_state_type = STATE_NORMAL; - previous_continued_action = continued_action; - in_rule = true; - - new_rule(); - } -break; -case 23: -#line 220 "./parse.y" -{ - pat = yyvsp[0]; - finish_rule( pat, variable_trail_rule, - headcnt, trailcnt ); - - if ( scon_stk_ptr > 0 ) - { - for ( i = 1; i <= scon_stk_ptr; ++i ) - scbol[scon_stk[i]] = - mkbranch( scbol[scon_stk[i]], - pat ); - } - - else - { - /* Add to all non-exclusive start conditions, - * including the default (0) start condition. - */ - - for ( i = 1; i <= lastsc; ++i ) - if ( ! scxclu[i] ) - scbol[i] = mkbranch( scbol[i], - pat ); - } - - if ( ! bol_needed ) - { - bol_needed = true; - - if ( performance_report > 1 ) - pinpoint_message( - "'^' operator results in sub-optimal performance" ); - } - } -break; -case 24: -#line 256 "./parse.y" -{ - pat = yyvsp[0]; - finish_rule( pat, variable_trail_rule, - headcnt, trailcnt ); - - if ( scon_stk_ptr > 0 ) - { - for ( i = 1; i <= scon_stk_ptr; ++i ) - scset[scon_stk[i]] = - mkbranch( scset[scon_stk[i]], - pat ); - } - - else - { - for ( i = 1; i <= lastsc; ++i ) - if ( ! scxclu[i] ) - scset[i] = - mkbranch( scset[i], - pat ); - } - } -break; -case 25: -#line 280 "./parse.y" -{ - if ( scon_stk_ptr > 0 ) - build_eof_action(); - - else - { - /* This EOF applies to all start conditions - * which don't already have EOF actions. - */ - for ( i = 1; i <= lastsc; ++i ) - if ( ! sceof[i] ) - scon_stk[++scon_stk_ptr] = i; - - if ( scon_stk_ptr == 0 ) - warn( - "all start conditions already have <> rules" ); - - else - build_eof_action(); - } - } -break; -case 26: -#line 303 "./parse.y" -{ synerr( "unrecognized rule" ); } -break; -case 27: -#line 307 "./parse.y" -{ yyval = scon_stk_ptr; } -break; -case 28: -#line 311 "./parse.y" -{ yyval = yyvsp[-2]; } -break; -case 29: -#line 314 "./parse.y" -{ - yyval = scon_stk_ptr; - - for ( i = 1; i <= lastsc; ++i ) - { - int j; - - for ( j = 1; j <= scon_stk_ptr; ++j ) - if ( scon_stk[j] == i ) - break; - - if ( j > scon_stk_ptr ) - scon_stk[++scon_stk_ptr] = i; - } - } -break; -case 30: -#line 331 "./parse.y" -{ yyval = scon_stk_ptr; } -break; -case 33: -#line 339 "./parse.y" -{ synerr( "bad start condition list" ); } -break; -case 34: -#line 343 "./parse.y" -{ - if ( (scnum = sclookup( nmstr )) == 0 ) - format_pinpoint_message( - "undeclared start condition %s", - nmstr ); - else - { - for ( i = 1; i <= scon_stk_ptr; ++i ) - if ( scon_stk[i] == scnum ) - { - format_warn( - "<%s> specified twice", - scname[scnum] ); - break; - } - - if ( i > scon_stk_ptr ) - scon_stk[++scon_stk_ptr] = scnum; - } - } -break; -case 35: -#line 366 "./parse.y" -{ - if ( transchar[lastst[yyvsp[0]]] != SYM_EPSILON ) - /* Provide final transition \now/ so it - * will be marked as a trailing context - * state. - */ - yyvsp[0] = link_machines( yyvsp[0], - mkstate( SYM_EPSILON ) ); - - mark_beginning_as_normal( yyvsp[0] ); - current_state_type = STATE_NORMAL; - - if ( previous_continued_action ) - { - /* We need to treat this as variable trailing - * context so that the backup does not happen - * in the action but before the action switch - * statement. If the backup happens in the - * action, then the rules "falling into" this - * one's action will *also* do the backup, - * erroneously. - */ - if ( ! varlength || headcnt != 0 ) - warn( - "trailing context made variable due to preceding '|' action" ); - - /* Mark as variable. */ - varlength = true; - headcnt = 0; - } - - if ( lex_compat || (varlength && headcnt == 0) ) - { /* variable trailing context rule */ - /* Mark the first part of the rule as the - * accepting "head" part of a trailing - * context rule. - * - * By the way, we didn't do this at the - * beginning of this production because back - * then current_state_type was set up for a - * trail rule, and add_accept() can create - * a new state ... - */ - add_accept( yyvsp[-1], - num_rules | YY_TRAILING_HEAD_MASK ); - variable_trail_rule = true; - } - - else - trailcnt = rulelen; - - yyval = link_machines( yyvsp[-1], yyvsp[0] ); - } -break; -case 36: -#line 421 "./parse.y" -{ synerr( "trailing context used twice" ); } -break; -case 37: -#line 424 "./parse.y" -{ - headcnt = 0; - trailcnt = 1; - rulelen = 1; - varlength = false; - - current_state_type = STATE_TRAILING_CONTEXT; - - if ( trlcontxt ) - { - synerr( "trailing context used twice" ); - yyval = mkstate( SYM_EPSILON ); - } - - else if ( previous_continued_action ) - { - /* See the comment in the rule for "re2 re" - * above. - */ - warn( - "trailing context made variable due to preceding '|' action" ); - - varlength = true; - } - - if ( lex_compat || varlength ) - { - /* Again, see the comment in the rule for - * "re2 re" above. - */ - add_accept( yyvsp[-1], - num_rules | YY_TRAILING_HEAD_MASK ); - variable_trail_rule = true; - } - - trlcontxt = true; - - eps = mkstate( SYM_EPSILON ); - yyval = link_machines( yyvsp[-1], - link_machines( eps, mkstate( '\n' ) ) ); - } -break; -case 38: -#line 467 "./parse.y" -{ - yyval = yyvsp[0]; - - if ( trlcontxt ) - { - if ( lex_compat || (varlength && headcnt == 0) ) - /* Both head and trail are - * variable-length. - */ - variable_trail_rule = true; - else - trailcnt = rulelen; - } - } -break; -case 39: -#line 485 "./parse.y" -{ - varlength = true; - yyval = mkor( yyvsp[-2], yyvsp[0] ); - } -break; -case 40: -#line 491 "./parse.y" -{ yyval = yyvsp[0]; } -break; -case 41: -#line 496 "./parse.y" -{ - /* This rule is written separately so the - * reduction will occur before the trailing - * series is parsed. - */ - - if ( trlcontxt ) - synerr( "trailing context used twice" ); - else - trlcontxt = true; - - if ( varlength ) - /* We hope the trailing context is - * fixed-length. - */ - varlength = false; - else - headcnt = rulelen; - - rulelen = 0; - - current_state_type = STATE_TRAILING_CONTEXT; - yyval = yyvsp[-1]; - } -break; -case 42: -#line 523 "./parse.y" -{ - /* This is where concatenation of adjacent patterns - * gets done. - */ - yyval = link_machines( yyvsp[-1], yyvsp[0] ); - } -break; -case 43: -#line 531 "./parse.y" -{ yyval = yyvsp[0]; } -break; -case 44: -#line 535 "./parse.y" -{ - varlength = true; - - yyval = mkclos( yyvsp[-1] ); - } -break; -case 45: -#line 542 "./parse.y" -{ - varlength = true; - yyval = mkposcl( yyvsp[-1] ); - } -break; -case 46: -#line 548 "./parse.y" -{ - varlength = true; - yyval = mkopt( yyvsp[-1] ); - } -break; -case 47: -#line 554 "./parse.y" -{ - varlength = true; - - if ( yyvsp[-3] > yyvsp[-1] || yyvsp[-3] < 0 ) - { - synerr( "bad iteration values" ); - yyval = yyvsp[-5]; - } - else - { - if ( yyvsp[-3] == 0 ) - { - if ( yyvsp[-1] <= 0 ) - { - synerr( - "bad iteration values" ); - yyval = yyvsp[-5]; - } - else - yyval = mkopt( - mkrep( yyvsp[-5], 1, yyvsp[-1] ) ); - } - else - yyval = mkrep( yyvsp[-5], yyvsp[-3], yyvsp[-1] ); - } - } -break; -case 48: -#line 582 "./parse.y" -{ - varlength = true; - - if ( yyvsp[-2] <= 0 ) - { - synerr( "iteration value must be positive" ); - yyval = yyvsp[-4]; - } - - else - yyval = mkrep( yyvsp[-4], yyvsp[-2], INFINITY ); - } -break; -case 49: -#line 596 "./parse.y" -{ - /* The singleton could be something like "(foo)", - * in which case we have no idea what its length - * is, so we punt here. - */ - varlength = true; - - if ( yyvsp[-1] <= 0 ) - { - synerr( "iteration value must be positive" ); - yyval = yyvsp[-3]; - } - - else - yyval = link_machines( yyvsp[-3], - copysingl( yyvsp[-3], yyvsp[-1] - 1 ) ); - } -break; -case 50: -#line 615 "./parse.y" -{ - if ( ! madeany ) - { - /* Create the '.' character class. */ - anyccl = cclinit(); - ccladd( anyccl, '\n' ); - cclnegate( anyccl ); - - if ( useecs ) - mkeccl( ccltbl + cclmap[anyccl], - ccllen[anyccl], nextecm, - ecgroup, csize, csize ); - - madeany = true; - } - - ++rulelen; - - yyval = mkstate( -anyccl ); - } -break; -case 51: -#line 637 "./parse.y" -{ - if ( ! cclsorted ) - /* Sort characters for fast searching. We - * use a shell sort since this list could - * be large. - */ - cshell( ccltbl + cclmap[yyvsp[0]], ccllen[yyvsp[0]], true ); - - if ( useecs ) - mkeccl( ccltbl + cclmap[yyvsp[0]], ccllen[yyvsp[0]], - nextecm, ecgroup, csize, csize ); - - ++rulelen; - - yyval = mkstate( -yyvsp[0] ); - } -break; -case 52: -#line 655 "./parse.y" -{ - ++rulelen; - - yyval = mkstate( -yyvsp[0] ); - } -break; -case 53: -#line 662 "./parse.y" -{ yyval = yyvsp[-1]; } -break; -case 54: -#line 665 "./parse.y" -{ yyval = yyvsp[-1]; } -break; -case 55: -#line 668 "./parse.y" -{ - ++rulelen; - - if ( caseins && yyvsp[0] >= 'A' && yyvsp[0] <= 'Z' ) - yyvsp[0] = clower( yyvsp[0] ); - - yyval = mkstate( yyvsp[0] ); - } -break; -case 56: -#line 679 "./parse.y" -{ yyval = yyvsp[-1]; } -break; -case 57: -#line 682 "./parse.y" -{ - cclnegate( yyvsp[-1] ); - yyval = yyvsp[-1]; - } -break; -case 58: -#line 689 "./parse.y" -{ - if ( caseins ) - { - if ( yyvsp[-2] >= 'A' && yyvsp[-2] <= 'Z' ) - yyvsp[-2] = clower( yyvsp[-2] ); - if ( yyvsp[0] >= 'A' && yyvsp[0] <= 'Z' ) - yyvsp[0] = clower( yyvsp[0] ); - } - - if ( yyvsp[-2] > yyvsp[0] ) - synerr( "negative range in character class" ); - - else - { - for ( i = yyvsp[-2]; i <= yyvsp[0]; ++i ) - ccladd( yyvsp[-3], i ); - - /* Keep track if this ccl is staying in - * alphabetical order. - */ - cclsorted = cclsorted && (yyvsp[-2] > lastchar); - lastchar = yyvsp[0]; - } - - yyval = yyvsp[-3]; - } -break; -case 59: -#line 717 "./parse.y" -{ - if ( caseins && yyvsp[0] >= 'A' && yyvsp[0] <= 'Z' ) - yyvsp[0] = clower( yyvsp[0] ); - - ccladd( yyvsp[-1], yyvsp[0] ); - cclsorted = cclsorted && (yyvsp[0] > lastchar); - lastchar = yyvsp[0]; - yyval = yyvsp[-1]; - } -break; -case 60: -#line 728 "./parse.y" -{ - /* Too hard to properly maintain cclsorted. */ - cclsorted = false; - yyval = yyvsp[-1]; - } -break; -case 61: -#line 735 "./parse.y" -{ - cclsorted = true; - lastchar = 0; - currccl = yyval = cclinit(); - } -break; -case 62: -#line 742 "./parse.y" -{ CCL_EXPR(isalnum) } -break; -case 63: -#line 743 "./parse.y" -{ CCL_EXPR(isalpha) } -break; -case 64: -#line 744 "./parse.y" -{ CCL_EXPR(IS_BLANK) } -break; -case 65: -#line 745 "./parse.y" -{ CCL_EXPR(iscntrl) } -break; -case 66: -#line 746 "./parse.y" -{ CCL_EXPR(isdigit) } -break; -case 67: -#line 747 "./parse.y" -{ CCL_EXPR(isgraph) } -break; -case 68: -#line 748 "./parse.y" -{ CCL_EXPR(islower) } -break; -case 69: -#line 749 "./parse.y" -{ CCL_EXPR(isprint) } -break; -case 70: -#line 750 "./parse.y" -{ CCL_EXPR(ispunct) } -break; -case 71: -#line 751 "./parse.y" -{ CCL_EXPR(isspace) } -break; -case 72: -#line 752 "./parse.y" -{ - if ( caseins ) - CCL_EXPR(islower) - else - CCL_EXPR(isupper) - } -break; -case 73: -#line 758 "./parse.y" -{ CCL_EXPR(isxdigit) } -break; -case 74: -#line 762 "./parse.y" -{ - if ( caseins && yyvsp[0] >= 'A' && yyvsp[0] <= 'Z' ) - yyvsp[0] = clower( yyvsp[0] ); - - ++rulelen; - - yyval = link_machines( yyvsp[-1], mkstate( yyvsp[0] ) ); - } -break; -case 75: -#line 772 "./parse.y" -{ yyval = mkstate( SYM_EPSILON ); } -break; -#line 1397 "y.tab.c" - } - yyssp -= yym; - yystate = *yyssp; - yyvsp -= yym; - yym = yylhs[yyn]; - if (yystate == 0 && yym == 0) - { -#if YYDEBUG - if (yydebug) - printf("%sdebug: after reduction, shifting from state 0 to\ - state %d\n", YYPREFIX, YYFINAL); -#endif - yystate = YYFINAL; - *++yyssp = YYFINAL; - *++yyvsp = yyval; - if (yychar < 0) - { - if ((yychar = yylex()) < 0) yychar = 0; -#if YYDEBUG - if (yydebug) - { - yys = 0; - if (yychar <= YYMAXTOKEN) yys = yyname[yychar]; - if (!yys) yys = "illegal-symbol"; - printf("%sdebug: state %d, reading %d (%s)\n", - YYPREFIX, YYFINAL, yychar, yys); - } -#endif - } - if (yychar == 0) goto yyaccept; - goto yyloop; - } - if ((yyn = yygindex[yym]) && (yyn += yystate) >= 0 && - yyn <= YYTABLESIZE && yycheck[yyn] == yystate) - yystate = yytable[yyn]; - else - yystate = yydgoto[yym]; -#if YYDEBUG - if (yydebug) - printf("%sdebug: after reduction, shifting from state %d \ -to state %d\n", YYPREFIX, *yyssp, yystate); -#endif - if (yyssp >= yyss + yystacksize - 1) - { - goto yyoverflow; - } - *++yyssp = yystate; - *++yyvsp = yyval; - goto yyloop; -yyoverflow: - yyerror("yacc stack overflow"); -yyabort: - return (1); -yyaccept: - return (0); -} diff --git a/commands/flex-2.5.4/MISC/parse.h b/commands/flex-2.5.4/MISC/parse.h deleted file mode 100644 index 10febed9d..000000000 --- a/commands/flex-2.5.4/MISC/parse.h +++ /dev/null @@ -1,24 +0,0 @@ -#define CHAR 257 -#define NUMBER 258 -#define SECTEND 259 -#define SCDECL 260 -#define XSCDECL 261 -#define NAME 262 -#define PREVCCL 263 -#define EOF_OP 264 -#define OPTION_OP 265 -#define OPT_OUTFILE 266 -#define OPT_PREFIX 267 -#define OPT_YYCLASS 268 -#define CCE_ALNUM 269 -#define CCE_ALPHA 270 -#define CCE_BLANK 271 -#define CCE_CNTRL 272 -#define CCE_DIGIT 273 -#define CCE_GRAPH 274 -#define CCE_LOWER 275 -#define CCE_PRINT 276 -#define CCE_PUNCT 277 -#define CCE_SPACE 278 -#define CCE_UPPER 279 -#define CCE_XDIGIT 280 diff --git a/commands/flex-2.5.4/MISC/testxxLexer.l b/commands/flex-2.5.4/MISC/testxxLexer.l deleted file mode 100644 index 94215411d..000000000 --- a/commands/flex-2.5.4/MISC/testxxLexer.l +++ /dev/null @@ -1,58 +0,0 @@ - // An example of using the flex C++ scanner class. - -%option C++ noyywrap - -%{ -int mylineno = 0; -%} - -string \"[^\n"]+\" - -ws [ \t]+ - -alpha [A-Za-z] -dig [0-9] -name ({alpha}|{dig}|\$)({alpha}|{dig}|\_|\.|\-|\/|\$)* -num1 [-+]?{dig}+\.?([eE][-+]?{dig}+)? -num2 [-+]?{dig}*\.{dig}+([eE][-+]?{dig}+)? -number {num1}|{num2} - -%% - -{ws} /* skip blanks and tabs */ - -"/*" { - int c; - - while((c = yyinput()) != 0) - { - if(c == '\n') - ++mylineno; - - else if(c == '*') - { - if((c = yyinput()) == '/') - break; - else - unput(c); - } - } - } - -{number} cout << "number " << YYText() << '\n'; - -\n mylineno++; - -{name} cout << "name " << YYText() << '\n'; - -{string} cout << "string " << YYText() << '\n'; - -%% - -int main( int /* argc */, char** /* argv */ ) - { - FlexLexer* lexer = new yyFlexLexer; - while(lexer->yylex() != 0) - ; - return 0; - } diff --git a/commands/flex-2.5.4/MISC/texinfo/flex.info b/commands/flex-2.5.4/MISC/texinfo/flex.info deleted file mode 100644 index 926941857..000000000 --- a/commands/flex-2.5.4/MISC/texinfo/flex.info +++ /dev/null @@ -1,2951 +0,0 @@ -This is Info file flex.info, produced by Makeinfo-1.55 from the input -file flex.texi. - -START-INFO-DIR-ENTRY -* Flex: (flex). A fast scanner generator. -END-INFO-DIR-ENTRY - - This file documents Flex. - - Copyright (c) 1990 The Regents of the University of California. All -rights reserved. - - This code is derived from software contributed to Berkeley by Vern -Paxson. - - The United States Government has rights in this work pursuant to -contract no. DE-AC03-76SF00098 between the United States Department of -Energy and the University of California. - - Redistribution and use in source and binary forms with or without -modification are permitted provided that: (1) source distributions -retain this entire copyright notice and comment, and (2) distributions -including binaries display the following acknowledgement: "This -product includes software developed by the University of California, -Berkeley and its contributors" in the documentation or other materials -provided with the distribution and in all advertising materials -mentioning features or use of this software. Neither the name of the -University nor the names of its contributors may be used to endorse or -promote products derived from this software without specific prior -written permission. - - THIS SOFTWARE IS PROVIDED "AS IS" AND WITHOUT ANY EXPRESS OR IMPLIED -WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF -MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. - - -File: flex.info, Node: Top, Next: Name, Prev: (dir), Up: (dir) - -flex -**** - - This manual documents `flex'. It covers release 2.5. - -* Menu: - -* Name:: Name -* Synopsis:: Synopsis -* Overview:: Overview -* Description:: Description -* Examples:: Some simple examples -* Format:: Format of the input file -* Patterns:: Patterns -* Matching:: How the input is matched -* Actions:: Actions -* Generated scanner:: The generated scanner -* Start conditions:: Start conditions -* Multiple buffers:: Multiple input buffers -* End-of-file rules:: End-of-file rules -* Miscellaneous:: Miscellaneous macros -* User variables:: Values available to the user -* YACC interface:: Interfacing with `yacc' -* Options:: Options -* Performance:: Performance considerations -* C++:: Generating C++ scanners -* Incompatibilities:: Incompatibilities with `lex' and POSIX -* Diagnostics:: Diagnostics -* Files:: Files -* Deficiencies:: Deficiencies / Bugs -* See also:: See also -* Author:: Author - - -File: flex.info, Node: Name, Next: Synopsis, Prev: Top, Up: Top - -Name -==== - - flex - fast lexical analyzer generator - - -File: flex.info, Node: Synopsis, Next: Overview, Prev: Name, Up: Top - -Synopsis -======== - - flex [-bcdfhilnpstvwBFILTV78+? -C[aefFmr] -ooutput -Pprefix -Sskeleton] - [--help --version] [FILENAME ...] - - -File: flex.info, Node: Overview, Next: Description, Prev: Synopsis, Up: Top - -Overview -======== - - This manual describes `flex', a tool for generating programs that -perform pattern-matching on text. The manual includes both tutorial -and reference sections: - -Description - a brief overview of the tool - -Some Simple Examples -Format Of The Input File -Patterns - the extended regular expressions used by flex - -How The Input Is Matched - the rules for determining what has been matched - -Actions - how to specify what to do when a pattern is matched - -The Generated Scanner - details regarding the scanner that flex produces; how to control - the input source - -Start Conditions - introducing context into your scanners, and managing - "mini-scanners" - -Multiple Input Buffers - how to manipulate multiple input sources; how to scan from strings - instead of files - -End-of-file Rules - special rules for matching the end of the input - -Miscellaneous Macros - a summary of macros available to the actions - -Values Available To The User - a summary of values available to the actions - -Interfacing With Yacc - connecting flex scanners together with yacc parsers - -Options - flex command-line options, and the "%option" directive - -Performance Considerations - how to make your scanner go as fast as possible - -Generating C++ Scanners - the (experimental) facility for generating C++ scanner classes - -Incompatibilities With Lex And POSIX - how flex differs from AT&T lex and the POSIX lex standard - -Diagnostics - those error messages produced by flex (or scanners it generates) - whose meanings might not be apparent - -Files - files used by flex - -Deficiencies / Bugs - known problems with flex - -See Also - other documentation, related tools - -Author - includes contact information - - -File: flex.info, Node: Description, Next: Examples, Prev: Overview, Up: Top - -Description -=========== - - `flex' is a tool for generating "scanners": programs which -recognized lexical patterns in text. `flex' reads the given input -files, or its standard input if no file names are given, for a -description of a scanner to generate. The description is in the form -of pairs of regular expressions and C code, called "rules". `flex' -generates as output a C source file, `lex.yy.c', which defines a -routine `yylex()'. This file is compiled and linked with the `-lfl' -library to produce an executable. When the executable is run, it -analyzes its input for occurrences of the regular expressions. -Whenever it finds one, it executes the corresponding C code. - - -File: flex.info, Node: Examples, Next: Format, Prev: Description, Up: Top - -Some simple examples -==================== - - First some simple examples to get the flavor of how one uses `flex'. -The following `flex' input specifies a scanner which whenever it -encounters the string "username" will replace it with the user's login -name: - - %% - username printf( "%s", getlogin() ); - - By default, any text not matched by a `flex' scanner is copied to -the output, so the net effect of this scanner is to copy its input file -to its output with each occurrence of "username" expanded. In this -input, there is just one rule. "username" is the PATTERN and the -"printf" is the ACTION. The "%%" marks the beginning of the rules. - - Here's another simple example: - - int num_lines = 0, num_chars = 0; - - %% - \n ++num_lines; ++num_chars; - . ++num_chars; - - %% - main() - { - yylex(); - printf( "# of lines = %d, # of chars = %d\n", - num_lines, num_chars ); - } - - This scanner counts the number of characters and the number of lines -in its input (it produces no output other than the final report on the -counts). The first line declares two globals, "num_lines" and -"num_chars", which are accessible both inside `yylex()' and in the -`main()' routine declared after the second "%%". There are two rules, -one which matches a newline ("\n") and increments both the line count -and the character count, and one which matches any character other than -a newline (indicated by the "." regular expression). - - A somewhat more complicated example: - - /* scanner for a toy Pascal-like language */ - - %{ - /* need this for the call to atof() below */ - #include - %} - - DIGIT [0-9] - ID [a-z][a-z0-9]* - - %% - - {DIGIT}+ { - printf( "An integer: %s (%d)\n", yytext, - atoi( yytext ) ); - } - - {DIGIT}+"."{DIGIT}* { - printf( "A float: %s (%g)\n", yytext, - atof( yytext ) ); - } - - if|then|begin|end|procedure|function { - printf( "A keyword: %s\n", yytext ); - } - - {ID} printf( "An identifier: %s\n", yytext ); - - "+"|"-"|"*"|"/" printf( "An operator: %s\n", yytext ); - - "{"[^}\n]*"}" /* eat up one-line comments */ - - [ \t\n]+ /* eat up whitespace */ - - . printf( "Unrecognized character: %s\n", yytext ); - - %% - - main( argc, argv ) - int argc; - char **argv; - { - ++argv, --argc; /* skip over program name */ - if ( argc > 0 ) - yyin = fopen( argv[0], "r" ); - else - yyin = stdin; - - yylex(); - } - - This is the beginnings of a simple scanner for a language like -Pascal. It identifies different types of TOKENS and reports on what it -has seen. - - The details of this example will be explained in the following -sections. - - -File: flex.info, Node: Format, Next: Patterns, Prev: Examples, Up: Top - -Format of the input file -======================== - - The `flex' input file consists of three sections, separated by a -line with just `%%' in it: - - definitions - %% - rules - %% - user code - - The "definitions" section contains declarations of simple "name" -definitions to simplify the scanner specification, and declarations of -"start conditions", which are explained in a later section. Name -definitions have the form: - - name definition - - The "name" is a word beginning with a letter or an underscore ('_') -followed by zero or more letters, digits, '_', or '-' (dash). The -definition is taken to begin at the first non-white-space character -following the name and continuing to the end of the line. The -definition can subsequently be referred to using "{name}", which will -expand to "(definition)". For example, - - DIGIT [0-9] - ID [a-z][a-z0-9]* - -defines "DIGIT" to be a regular expression which matches a single -digit, and "ID" to be a regular expression which matches a letter -followed by zero-or-more letters-or-digits. A subsequent reference to - - {DIGIT}+"."{DIGIT}* - -is identical to - - ([0-9])+"."([0-9])* - -and matches one-or-more digits followed by a '.' followed by -zero-or-more digits. - - The RULES section of the `flex' input contains a series of rules of -the form: - - pattern action - -where the pattern must be unindented and the action must begin on the -same line. - - See below for a further description of patterns and actions. - - Finally, the user code section is simply copied to `lex.yy.c' -verbatim. It is used for companion routines which call or are called -by the scanner. The presence of this section is optional; if it is -missing, the second `%%' in the input file may be skipped, too. - - In the definitions and rules sections, any *indented* text or text -enclosed in `%{' and `%}' is copied verbatim to the output (with the -`%{}''s removed). The `%{}''s must appear unindented on lines by -themselves. - - In the rules section, any indented or %{} text appearing before the -first rule may be used to declare variables which are local to the -scanning routine and (after the declarations) code which is to be -executed whenever the scanning routine is entered. Other indented or -%{} text in the rule section is still copied to the output, but its -meaning is not well-defined and it may well cause compile-time errors -(this feature is present for `POSIX' compliance; see below for other -such features). - - In the definitions section (but not in the rules section), an -unindented comment (i.e., a line beginning with "/*") is also copied -verbatim to the output up to the next "*/". - - -File: flex.info, Node: Patterns, Next: Matching, Prev: Format, Up: Top - -Patterns -======== - - The patterns in the input are written using an extended set of -regular expressions. These are: - -`x' - match the character `x' - -`.' - any character (byte) except newline - -`[xyz]' - a "character class"; in this case, the pattern matches either an - `x', a `y', or a `z' - -`[abj-oZ]' - a "character class" with a range in it; matches an `a', a `b', any - letter from `j' through `o', or a `Z' - -`[^A-Z]' - a "negated character class", i.e., any character but those in the - class. In this case, any character EXCEPT an uppercase letter. - -`[^A-Z\n]' - any character EXCEPT an uppercase letter or a newline - -`R*' - zero or more R's, where R is any regular expression - -`R+' - one or more R's - -`R?' - zero or one R's (that is, "an optional R") - -`R{2,5}' - anywhere from two to five R's - -`R{2,}' - two or more R's - -`R{4}' - exactly 4 R's - -`{NAME}' - the expansion of the "NAME" definition (see above) - -`"[xyz]\"foo"' - the literal string: `[xyz]"foo' - -`\X' - if X is an `a', `b', `f', `n', `r', `t', or `v', then the ANSI-C - interpretation of \X. Otherwise, a literal `X' (used to escape - operators such as `*') - -`\0' - a NUL character (ASCII code 0) - -`\123' - the character with octal value 123 - -`\x2a' - the character with hexadecimal value `2a' - -`(R)' - match an R; parentheses are used to override precedence (see below) - -`RS' - the regular expression R followed by the regular expression S; - called "concatenation" - -`R|S' - either an R or an S - -`R/S' - an R but only if it is followed by an S. The text matched by S is - included when determining whether this rule is the "longest - match", but is then returned to the input before the action is - executed. So the action only sees the text matched by R. This - type of pattern is called "trailing context". (There are some - combinations of `R/S' that `flex' cannot match correctly; see - notes in the Deficiencies / Bugs section below regarding - "dangerous trailing context".) - -`^R' - an R, but only at the beginning of a line (i.e., which just - starting to scan, or right after a newline has been scanned). - -`R$' - an R, but only at the end of a line (i.e., just before a newline). - Equivalent to "R/\n". - - Note that flex's notion of "newline" is exactly whatever the C - compiler used to compile flex interprets '\n' as; in particular, - on some DOS systems you must either filter out \r's in the input - yourself, or explicitly use R/\r\n for "r$". - -`R' - an R, but only in start condition S (see below for discussion of - start conditions) R same, but in any of start conditions - S1, S2, or S3 - -`<*>R' - an R in any start condition, even an exclusive one. - -`<>' - an end-of-file <> an end-of-file when in start - condition S1 or S2 - - Note that inside of a character class, all regular expression -operators lose their special meaning except escape ('\') and the -character class operators, '-', ']', and, at the beginning of the -class, '^'. - - The regular expressions listed above are grouped according to -precedence, from highest precedence at the top to lowest at the bottom. -Those grouped together have equal precedence. For example, - - foo|bar* - -is the same as - - (foo)|(ba(r*)) - -since the '*' operator has higher precedence than concatenation, and -concatenation higher than alternation ('|'). This pattern therefore -matches *either* the string "foo" *or* the string "ba" followed by -zero-or-more r's. To match "foo" or zero-or-more "bar"'s, use: - - foo|(bar)* - -and to match zero-or-more "foo"'s-or-"bar"'s: - - (foo|bar)* - - In addition to characters and ranges of characters, character -classes can also contain character class "expressions". These are -expressions enclosed inside `[': and `:'] delimiters (which themselves -must appear between the '[' and ']' of the character class; other -elements may occur inside the character class, too). The valid -expressions are: - - [:alnum:] [:alpha:] [:blank:] - [:cntrl:] [:digit:] [:graph:] - [:lower:] [:print:] [:punct:] - [:space:] [:upper:] [:xdigit:] - - These expressions all designate a set of characters equivalent to -the corresponding standard C `isXXX' function. For example, -`[:alnum:]' designates those characters for which `isalnum()' returns -true - i.e., any alphabetic or numeric. Some systems don't provide -`isblank()', so flex defines `[:blank:]' as a blank or a tab. - - For example, the following character classes are all equivalent: - - [[:alnum:]] - [[:alpha:][:digit:] - [[:alpha:]0-9] - [a-zA-Z0-9] - - If your scanner is case-insensitive (the `-i' flag), then -`[:upper:]' and `[:lower:]' are equivalent to `[:alpha:]'. - - Some notes on patterns: - - - A negated character class such as the example "[^A-Z]" above *will - match a newline* unless "\n" (or an equivalent escape sequence) is - one of the characters explicitly present in the negated character - class (e.g., "[^A-Z\n]"). This is unlike how many other regular - expression tools treat negated character classes, but - unfortunately the inconsistency is historically entrenched. - Matching newlines means that a pattern like [^"]* can match the - entire input unless there's another quote in the input. - - - A rule can have at most one instance of trailing context (the '/' - operator or the '$' operator). The start condition, '^', and - "<>" patterns can only occur at the beginning of a pattern, - and, as well as with '/' and '$', cannot be grouped inside - parentheses. A '^' which does not occur at the beginning of a - rule or a '$' which does not occur at the end of a rule loses its - special properties and is treated as a normal character. - - The following are illegal: - - foo/bar$ - foobar - - Note that the first of these, can be written "foo/bar\n". - - The following will result in '$' or '^' being treated as a normal - character: - - foo|(bar$) - foo|^bar - - If what's wanted is a "foo" or a bar-followed-by-a-newline, the - following could be used (the special '|' action is explained - below): - - foo | - bar$ /* action goes here */ - - A similar trick will work for matching a foo or a - bar-at-the-beginning-of-a-line. - - -File: flex.info, Node: Matching, Next: Actions, Prev: Patterns, Up: Top - -How the input is matched -======================== - - When the generated scanner is run, it analyzes its input looking for -strings which match any of its patterns. If it finds more than one -match, it takes the one matching the most text (for trailing context -rules, this includes the length of the trailing part, even though it -will then be returned to the input). If it finds two or more matches -of the same length, the rule listed first in the `flex' input file is -chosen. - - Once the match is determined, the text corresponding to the match -(called the TOKEN) is made available in the global character pointer -`yytext', and its length in the global integer `yyleng'. The ACTION -corresponding to the matched pattern is then executed (a more detailed -description of actions follows), and then the remaining input is -scanned for another match. - - If no match is found, then the "default rule" is executed: the next -character in the input is considered matched and copied to the standard -output. Thus, the simplest legal `flex' input is: - - %% - - which generates a scanner that simply copies its input (one -character at a time) to its output. - - Note that `yytext' can be defined in two different ways: either as a -character *pointer* or as a character *array*. You can control which -definition `flex' uses by including one of the special directives -`%pointer' or `%array' in the first (definitions) section of your flex -input. The default is `%pointer', unless you use the `-l' lex -compatibility option, in which case `yytext' will be an array. The -advantage of using `%pointer' is substantially faster scanning and no -buffer overflow when matching very large tokens (unless you run out of -dynamic memory). The disadvantage is that you are restricted in how -your actions can modify `yytext' (see the next section), and calls to -the `unput()' function destroys the present contents of `yytext', which -can be a considerable porting headache when moving between different -`lex' versions. - - The advantage of `%array' is that you can then modify `yytext' to -your heart's content, and calls to `unput()' do not destroy `yytext' -(see below). Furthermore, existing `lex' programs sometimes access -`yytext' externally using declarations of the form: - extern char yytext[]; - This definition is erroneous when used with `%pointer', but correct -for `%array'. - - `%array' defines `yytext' to be an array of `YYLMAX' characters, -which defaults to a fairly large value. You can change the size by -simply #define'ing `YYLMAX' to a different value in the first section -of your `flex' input. As mentioned above, with `%pointer' yytext grows -dynamically to accommodate large tokens. While this means your -`%pointer' scanner can accommodate very large tokens (such as matching -entire blocks of comments), bear in mind that each time the scanner -must resize `yytext' it also must rescan the entire token from the -beginning, so matching such tokens can prove slow. `yytext' presently -does *not* dynamically grow if a call to `unput()' results in too much -text being pushed back; instead, a run-time error results. - - Also note that you cannot use `%array' with C++ scanner classes (the -`c++' option; see below). - - -File: flex.info, Node: Actions, Next: Generated scanner, Prev: Matching, Up: Top - -Actions -======= - - Each pattern in a rule has a corresponding action, which can be any -arbitrary C statement. The pattern ends at the first non-escaped -whitespace character; the remainder of the line is its action. If the -action is empty, then when the pattern is matched the input token is -simply discarded. For example, here is the specification for a program -which deletes all occurrences of "zap me" from its input: - - %% - "zap me" - - (It will copy all other characters in the input to the output since -they will be matched by the default rule.) - - Here is a program which compresses multiple blanks and tabs down to -a single blank, and throws away whitespace found at the end of a line: - - %% - [ \t]+ putchar( ' ' ); - [ \t]+$ /* ignore this token */ - - If the action contains a '{', then the action spans till the -balancing '}' is found, and the action may cross multiple lines. -`flex' knows about C strings and comments and won't be fooled by braces -found within them, but also allows actions to begin with `%{' and will -consider the action to be all the text up to the next `%}' (regardless -of ordinary braces inside the action). - - An action consisting solely of a vertical bar ('|') means "same as -the action for the next rule." See below for an illustration. - - Actions can include arbitrary C code, including `return' statements -to return a value to whatever routine called `yylex()'. Each time -`yylex()' is called it continues processing tokens from where it last -left off until it either reaches the end of the file or executes a -return. - - Actions are free to modify `yytext' except for lengthening it -(adding characters to its end-these will overwrite later characters in -the input stream). This however does not apply when using `%array' -(see above); in that case, `yytext' may be freely modified in any way. - - Actions are free to modify `yyleng' except they should not do so if -the action also includes use of `yymore()' (see below). - - There are a number of special directives which can be included -within an action: - - - `ECHO' copies yytext to the scanner's output. - - - `BEGIN' followed by the name of a start condition places the - scanner in the corresponding start condition (see below). - - - `REJECT' directs the scanner to proceed on to the "second best" - rule which matched the input (or a prefix of the input). The rule - is chosen as described above in "How the Input is Matched", and - `yytext' and `yyleng' set up appropriately. It may either be one - which matched as much text as the originally chosen rule but came - later in the `flex' input file, or one which matched less text. - For example, the following will both count the words in the input - and call the routine special() whenever "frob" is seen: - - int word_count = 0; - %% - - frob special(); REJECT; - [^ \t\n]+ ++word_count; - - Without the `REJECT', any "frob"'s in the input would not be - counted as words, since the scanner normally executes only one - action per token. Multiple `REJECT's' are allowed, each one - finding the next best choice to the currently active rule. For - example, when the following scanner scans the token "abcd", it - will write "abcdabcaba" to the output: - - %% - a | - ab | - abc | - abcd ECHO; REJECT; - .|\n /* eat up any unmatched character */ - - (The first three rules share the fourth's action since they use - the special '|' action.) `REJECT' is a particularly expensive - feature in terms of scanner performance; if it is used in *any* of - the scanner's actions it will slow down *all* of the scanner's - matching. Furthermore, `REJECT' cannot be used with the `-Cf' or - `-CF' options (see below). - - Note also that unlike the other special actions, `REJECT' is a - *branch*; code immediately following it in the action will *not* - be executed. - - - `yymore()' tells the scanner that the next time it matches a rule, - the corresponding token should be *appended* onto the current - value of `yytext' rather than replacing it. For example, given - the input "mega-kludge" the following will write - "mega-mega-kludge" to the output: - - %% - mega- ECHO; yymore(); - kludge ECHO; - - First "mega-" is matched and echoed to the output. Then "kludge" - is matched, but the previous "mega-" is still hanging around at - the beginning of `yytext' so the `ECHO' for the "kludge" rule will - actually write "mega-kludge". - - Two notes regarding use of `yymore()'. First, `yymore()' depends on -the value of `yyleng' correctly reflecting the size of the current -token, so you must not modify `yyleng' if you are using `yymore()'. -Second, the presence of `yymore()' in the scanner's action entails a -minor performance penalty in the scanner's matching speed. - - - `yyless(n)' returns all but the first N characters of the current - token back to the input stream, where they will be rescanned when - the scanner looks for the next match. `yytext' and `yyleng' are - adjusted appropriately (e.g., `yyleng' will now be equal to N ). - For example, on the input "foobar" the following will write out - "foobarbar": - - %% - foobar ECHO; yyless(3); - [a-z]+ ECHO; - - An argument of 0 to `yyless' will cause the entire current input - string to be scanned again. Unless you've changed how the scanner - will subsequently process its input (using `BEGIN', for example), - this will result in an endless loop. - - Note that `yyless' is a macro and can only be used in the flex - input file, not from other source files. - - - `unput(c)' puts the character `c' back onto the input stream. It - will be the next character scanned. The following action will - take the current token and cause it to be rescanned enclosed in - parentheses. - - { - int i; - /* Copy yytext because unput() trashes yytext */ - char *yycopy = strdup( yytext ); - unput( ')' ); - for ( i = yyleng - 1; i >= 0; --i ) - unput( yycopy[i] ); - unput( '(' ); - free( yycopy ); - } - - Note that since each `unput()' puts the given character back at - the *beginning* of the input stream, pushing back strings must be - done back-to-front. An important potential problem when using - `unput()' is that if you are using `%pointer' (the default), a - call to `unput()' *destroys* the contents of `yytext', starting - with its rightmost character and devouring one character to the - left with each call. If you need the value of yytext preserved - after a call to `unput()' (as in the above example), you must - either first copy it elsewhere, or build your scanner using - `%array' instead (see How The Input Is Matched). - - Finally, note that you cannot put back `EOF' to attempt to mark - the input stream with an end-of-file. - - - `input()' reads the next character from the input stream. For - example, the following is one way to eat up C comments: - - %% - "/*" { - register int c; - - for ( ; ; ) - { - while ( (c = input()) != '*' && - c != EOF ) - ; /* eat up text of comment */ - - if ( c == '*' ) - { - while ( (c = input()) == '*' ) - ; - if ( c == '/' ) - break; /* found the end */ - } - - if ( c == EOF ) - { - error( "EOF in comment" ); - break; - } - } - } - - (Note that if the scanner is compiled using `C++', then `input()' - is instead referred to as `yyinput()', in order to avoid a name - clash with the `C++' stream by the name of `input'.) - - - YY_FLUSH_BUFFER flushes the scanner's internal buffer so that the - next time the scanner attempts to match a token, it will first - refill the buffer using `YY_INPUT' (see The Generated Scanner, - below). This action is a special case of the more general - `yy_flush_buffer()' function, described below in the section - Multiple Input Buffers. - - - `yyterminate()' can be used in lieu of a return statement in an - action. It terminates the scanner and returns a 0 to the - scanner's caller, indicating "all done". By default, - `yyterminate()' is also called when an end-of-file is encountered. - It is a macro and may be redefined. - - -File: flex.info, Node: Generated scanner, Next: Start conditions, Prev: Actions, Up: Top - -The generated scanner -===================== - - The output of `flex' is the file `lex.yy.c', which contains the -scanning routine `yylex()', a number of tables used by it for matching -tokens, and a number of auxiliary routines and macros. By default, -`yylex()' is declared as follows: - - int yylex() - { - ... various definitions and the actions in here ... - } - - (If your environment supports function prototypes, then it will be -"int yylex( void )".) This definition may be changed by defining -the "YY_DECL" macro. For example, you could use: - - #define YY_DECL float lexscan( a, b ) float a, b; - - to give the scanning routine the name `lexscan', returning a float, -and taking two floats as arguments. Note that if you give arguments to -the scanning routine using a K&R-style/non-prototyped function -declaration, you must terminate the definition with a semi-colon (`;'). - - Whenever `yylex()' is called, it scans tokens from the global input -file `yyin' (which defaults to stdin). It continues until it either -reaches an end-of-file (at which point it returns the value 0) or one -of its actions executes a `return' statement. - - If the scanner reaches an end-of-file, subsequent calls are undefined -unless either `yyin' is pointed at a new input file (in which case -scanning continues from that file), or `yyrestart()' is called. -`yyrestart()' takes one argument, a `FILE *' pointer (which can be nil, -if you've set up `YY_INPUT' to scan from a source other than `yyin'), -and initializes `yyin' for scanning from that file. Essentially there -is no difference between just assigning `yyin' to a new input file or -using `yyrestart()' to do so; the latter is available for compatibility -with previous versions of `flex', and because it can be used to switch -input files in the middle of scanning. It can also be used to throw -away the current input buffer, by calling it with an argument of -`yyin'; but better is to use `YY_FLUSH_BUFFER' (see above). Note that -`yyrestart()' does *not* reset the start condition to `INITIAL' (see -Start Conditions, below). - - If `yylex()' stops scanning due to executing a `return' statement in -one of the actions, the scanner may then be called again and it will -resume scanning where it left off. - - By default (and for purposes of efficiency), the scanner uses -block-reads rather than simple `getc()' calls to read characters from -`yyin'. The nature of how it gets its input can be controlled by -defining the `YY_INPUT' macro. YY_INPUT's calling sequence is -"YY_INPUT(buf,result,max_size)". Its action is to place up to MAX_SIZE -characters in the character array BUF and return in the integer -variable RESULT either the number of characters read or the constant -YY_NULL (0 on Unix systems) to indicate EOF. The default YY_INPUT -reads from the global file-pointer "yyin". - - A sample definition of YY_INPUT (in the definitions section of the -input file): - - %{ - #define YY_INPUT(buf,result,max_size) \ - { \ - int c = getchar(); \ - result = (c == EOF) ? YY_NULL : (buf[0] = c, 1); \ - } - %} - - This definition will change the input processing to occur one -character at a time. - - When the scanner receives an end-of-file indication from YY_INPUT, -it then checks the `yywrap()' function. If `yywrap()' returns false -(zero), then it is assumed that the function has gone ahead and set up -`yyin' to point to another input file, and scanning continues. If it -returns true (non-zero), then the scanner terminates, returning 0 to -its caller. Note that in either case, the start condition remains -unchanged; it does *not* revert to `INITIAL'. - - If you do not supply your own version of `yywrap()', then you must -either use `%option noyywrap' (in which case the scanner behaves as -though `yywrap()' returned 1), or you must link with `-lfl' to obtain -the default version of the routine, which always returns 1. - - Three routines are available for scanning from in-memory buffers -rather than files: `yy_scan_string()', `yy_scan_bytes()', and -`yy_scan_buffer()'. See the discussion of them below in the section -Multiple Input Buffers. - - The scanner writes its `ECHO' output to the `yyout' global (default, -stdout), which may be redefined by the user simply by assigning it to -some other `FILE' pointer. - - -File: flex.info, Node: Start conditions, Next: Multiple buffers, Prev: Generated scanner, Up: Top - -Start conditions -================ - - `flex' provides a mechanism for conditionally activating rules. Any -rule whose pattern is prefixed with "" will only be active when the -scanner is in the start condition named "sc". For example, - - [^"]* { /* eat up the string body ... */ - ... - } - -will be active only when the scanner is in the "STRING" start -condition, and - - \. { /* handle an escape ... */ - ... - } - -will be active only when the current start condition is either -"INITIAL", "STRING", or "QUOTE". - - Start conditions are declared in the definitions (first) section of -the input using unindented lines beginning with either `%s' or `%x' -followed by a list of names. The former declares *inclusive* start -conditions, the latter *exclusive* start conditions. A start condition -is activated using the `BEGIN' action. Until the next `BEGIN' action is -executed, rules with the given start condition will be active and rules -with other start conditions will be inactive. If the start condition -is *inclusive*, then rules with no start conditions at all will also be -active. If it is *exclusive*, then *only* rules qualified with the -start condition will be active. A set of rules contingent on the same -exclusive start condition describe a scanner which is independent of -any of the other rules in the `flex' input. Because of this, exclusive -start conditions make it easy to specify "mini-scanners" which scan -portions of the input that are syntactically different from the rest -(e.g., comments). - - If the distinction between inclusive and exclusive start conditions -is still a little vague, here's a simple example illustrating the -connection between the two. The set of rules: - - %s example - %% - - foo do_something(); - - bar something_else(); - -is equivalent to - - %x example - %% - - foo do_something(); - - bar something_else(); - - Without the `' qualifier, the `bar' pattern in the -second example wouldn't be active (i.e., couldn't match) when in start -condition `example'. If we just used `' to qualify `bar', -though, then it would only be active in `example' and not in `INITIAL', -while in the first example it's active in both, because in the first -example the `example' starting condition is an *inclusive* (`%s') start -condition. - - Also note that the special start-condition specifier `<*>' matches -every start condition. Thus, the above example could also have been -written; - - %x example - %% - - foo do_something(); - - <*>bar something_else(); - - The default rule (to `ECHO' any unmatched character) remains active -in start conditions. It is equivalent to: - - <*>.|\\n ECHO; - - `BEGIN(0)' returns to the original state where only the rules with -no start conditions are active. This state can also be referred to as -the start-condition "INITIAL", so `BEGIN(INITIAL)' is equivalent to -`BEGIN(0)'. (The parentheses around the start condition name are not -required but are considered good style.) - - `BEGIN' actions can also be given as indented code at the beginning -of the rules section. For example, the following will cause the -scanner to enter the "SPECIAL" start condition whenever `yylex()' is -called and the global variable `enter_special' is true: - - int enter_special; - - %x SPECIAL - %% - if ( enter_special ) - BEGIN(SPECIAL); - - blahblahblah - ...more rules follow... - - To illustrate the uses of start conditions, here is a scanner which -provides two different interpretations of a string like "123.456". By -default it will treat it as as three tokens, the integer "123", a dot -('.'), and the integer "456". But if the string is preceded earlier in -the line by the string "expect-floats" it will treat it as a single -token, the floating-point number 123.456: - - %{ - #include - %} - %s expect - - %% - expect-floats BEGIN(expect); - - [0-9]+"."[0-9]+ { - printf( "found a float, = %f\n", - atof( yytext ) ); - } - \n { - /* that's the end of the line, so - * we need another "expect-number" - * before we'll recognize any more - * numbers - */ - BEGIN(INITIAL); - } - - [0-9]+ { - - Version 2.5 December 1994 18 - - printf( "found an integer, = %d\n", - atoi( yytext ) ); - } - - "." printf( "found a dot\n" ); - - Here is a scanner which recognizes (and discards) C comments while -maintaining a count of the current input line. - - %x comment - %% - int line_num = 1; - - "/*" BEGIN(comment); - - [^*\n]* /* eat anything that's not a '*' */ - "*"+[^*/\n]* /* eat up '*'s not followed by '/'s */ - \n ++line_num; - "*"+"/" BEGIN(INITIAL); - - This scanner goes to a bit of trouble to match as much text as -possible with each rule. In general, when attempting to write a -high-speed scanner try to match as much possible in each rule, as it's -a big win. - - Note that start-conditions names are really integer values and can -be stored as such. Thus, the above could be extended in the following -fashion: - - %x comment foo - %% - int line_num = 1; - int comment_caller; - - "/*" { - comment_caller = INITIAL; - BEGIN(comment); - } - - ... - - "/*" { - comment_caller = foo; - BEGIN(comment); - } - - [^*\n]* /* eat anything that's not a '*' */ - "*"+[^*/\n]* /* eat up '*'s not followed by '/'s */ - \n ++line_num; - "*"+"/" BEGIN(comment_caller); - - Furthermore, you can access the current start condition using the -integer-valued `YY_START' macro. For example, the above assignments to -`comment_caller' could instead be written - - comment_caller = YY_START; - - Flex provides `YYSTATE' as an alias for `YY_START' (since that is -what's used by AT&T `lex'). - - Note that start conditions do not have their own name-space; %s's -and %x's declare names in the same fashion as #define's. - - Finally, here's an example of how to match C-style quoted strings -using exclusive start conditions, including expanded escape sequences -(but not including checking for a string that's too long): - - %x str - - %% - char string_buf[MAX_STR_CONST]; - char *string_buf_ptr; - - \" string_buf_ptr = string_buf; BEGIN(str); - - \" { /* saw closing quote - all done */ - BEGIN(INITIAL); - *string_buf_ptr = '\0'; - /* return string constant token type and - * value to parser - */ - } - - \n { - /* error - unterminated string constant */ - /* generate error message */ - } - - \\[0-7]{1,3} { - /* octal escape sequence */ - int result; - - (void) sscanf( yytext + 1, "%o", &result ); - - if ( result > 0xff ) - /* error, constant is out-of-bounds */ - - *string_buf_ptr++ = result; - } - - \\[0-9]+ { - /* generate error - bad escape sequence; something - * like '\48' or '\0777777' - */ - } - - \\n *string_buf_ptr++ = '\n'; - \\t *string_buf_ptr++ = '\t'; - \\r *string_buf_ptr++ = '\r'; - \\b *string_buf_ptr++ = '\b'; - \\f *string_buf_ptr++ = '\f'; - - \\(.|\n) *string_buf_ptr++ = yytext[1]; - - [^\\\n\"]+ { - char *yptr = yytext; - - while ( *yptr ) - *string_buf_ptr++ = *yptr++; - } - - Often, such as in some of the examples above, you wind up writing a -whole bunch of rules all preceded by the same start condition(s). Flex -makes this a little easier and cleaner by introducing a notion of start -condition "scope". A start condition scope is begun with: - - { - -where SCs is a list of one or more start conditions. Inside the start -condition scope, every rule automatically has the prefix `' -applied to it, until a `}' which matches the initial `{'. So, for -example, - - { - "\\n" return '\n'; - "\\r" return '\r'; - "\\f" return '\f'; - "\\0" return '\0'; - } - -is equivalent to: - - "\\n" return '\n'; - "\\r" return '\r'; - "\\f" return '\f'; - "\\0" return '\0'; - - Start condition scopes may be nested. - - Three routines are available for manipulating stacks of start -conditions: - -`void yy_push_state(int new_state)' - pushes the current start condition onto the top of the start - condition stack and switches to NEW_STATE as though you had used - `BEGIN new_state' (recall that start condition names are also - integers). - -`void yy_pop_state()' - pops the top of the stack and switches to it via `BEGIN'. - -`int yy_top_state()' - returns the top of the stack without altering the stack's contents. - - The start condition stack grows dynamically and so has no built-in -size limitation. If memory is exhausted, program execution aborts. - - To use start condition stacks, your scanner must include a `%option -stack' directive (see Options below). - - -File: flex.info, Node: Multiple buffers, Next: End-of-file rules, Prev: Start conditions, Up: Top - -Multiple input buffers -====================== - - Some scanners (such as those which support "include" files) require -reading from several input streams. As `flex' scanners do a large -amount of buffering, one cannot control where the next input will be -read from by simply writing a `YY_INPUT' which is sensitive to the -scanning context. `YY_INPUT' is only called when the scanner reaches -the end of its buffer, which may be a long time after scanning a -statement such as an "include" which requires switching the input -source. - - To negotiate these sorts of problems, `flex' provides a mechanism -for creating and switching between multiple input buffers. An input -buffer is created by using: - - YY_BUFFER_STATE yy_create_buffer( FILE *file, int size ) - -which takes a `FILE' pointer and a size and creates a buffer associated -with the given file and large enough to hold SIZE characters (when in -doubt, use `YY_BUF_SIZE' for the size). It returns a `YY_BUFFER_STATE' -handle, which may then be passed to other routines (see below). The -`YY_BUFFER_STATE' type is a pointer to an opaque `struct' -`yy_buffer_state' structure, so you may safely initialize -YY_BUFFER_STATE variables to `((YY_BUFFER_STATE) 0)' if you wish, and -also refer to the opaque structure in order to correctly declare input -buffers in source files other than that of your scanner. Note that the -`FILE' pointer in the call to `yy_create_buffer' is only used as the -value of `yyin' seen by `YY_INPUT'; if you redefine `YY_INPUT' so it no -longer uses `yyin', then you can safely pass a nil `FILE' pointer to -`yy_create_buffer'. You select a particular buffer to scan from using: - - void yy_switch_to_buffer( YY_BUFFER_STATE new_buffer ) - - switches the scanner's input buffer so subsequent tokens will come -from NEW_BUFFER. Note that `yy_switch_to_buffer()' may be used by -`yywrap()' to set things up for continued scanning, instead of opening -a new file and pointing `yyin' at it. Note also that switching input -sources via either `yy_switch_to_buffer()' or `yywrap()' does *not* -change the start condition. - - void yy_delete_buffer( YY_BUFFER_STATE buffer ) - -is used to reclaim the storage associated with a buffer. You can also -clear the current contents of a buffer using: - - void yy_flush_buffer( YY_BUFFER_STATE buffer ) - - This function discards the buffer's contents, so the next time the -scanner attempts to match a token from the buffer, it will first fill -the buffer anew using `YY_INPUT'. - - `yy_new_buffer()' is an alias for `yy_create_buffer()', provided for -compatibility with the C++ use of `new' and `delete' for creating and -destroying dynamic objects. - - Finally, the `YY_CURRENT_BUFFER' macro returns a `YY_BUFFER_STATE' -handle to the current buffer. - - Here is an example of using these features for writing a scanner -which expands include files (the `<>' feature is discussed below): - - /* the "incl" state is used for picking up the name - * of an include file - */ - %x incl - - %{ - #define MAX_INCLUDE_DEPTH 10 - YY_BUFFER_STATE include_stack[MAX_INCLUDE_DEPTH]; - int include_stack_ptr = 0; - %} - - %% - include BEGIN(incl); - - [a-z]+ ECHO; - [^a-z\n]*\n? ECHO; - - [ \t]* /* eat the whitespace */ - [^ \t\n]+ { /* got the include file name */ - if ( include_stack_ptr >= MAX_INCLUDE_DEPTH ) - { - fprintf( stderr, "Includes nested too deeply" ); - exit( 1 ); - } - - include_stack[include_stack_ptr++] = - YY_CURRENT_BUFFER; - - yyin = fopen( yytext, "r" ); - - if ( ! yyin ) - error( ... ); - - yy_switch_to_buffer( - yy_create_buffer( yyin, YY_BUF_SIZE ) ); - - BEGIN(INITIAL); - } - - <> { - if ( --include_stack_ptr < 0 ) - { - yyterminate(); - } - - else - { - yy_delete_buffer( YY_CURRENT_BUFFER ); - yy_switch_to_buffer( - include_stack[include_stack_ptr] ); - } - } - - Three routines are available for setting up input buffers for -scanning in-memory strings instead of files. All of them create a new -input buffer for scanning the string, and return a corresponding -`YY_BUFFER_STATE' handle (which you should delete with -`yy_delete_buffer()' when done with it). They also switch to the new -buffer using `yy_switch_to_buffer()', so the next call to `yylex()' will -start scanning the string. - -`yy_scan_string(const char *str)' - scans a NUL-terminated string. - -`yy_scan_bytes(const char *bytes, int len)' - scans `len' bytes (including possibly NUL's) starting at location - BYTES. - - Note that both of these functions create and scan a *copy* of the -string or bytes. (This may be desirable, since `yylex()' modifies the -contents of the buffer it is scanning.) You can avoid the copy by using: - -`yy_scan_buffer(char *base, yy_size_t size)' - which scans in place the buffer starting at BASE, consisting of - SIZE bytes, the last two bytes of which *must* be - `YY_END_OF_BUFFER_CHAR' (ASCII NUL). These last two bytes are not - scanned; thus, scanning consists of `base[0]' through - `base[size-2]', inclusive. - - If you fail to set up BASE in this manner (i.e., forget the final - two `YY_END_OF_BUFFER_CHAR' bytes), then `yy_scan_buffer()' - returns a nil pointer instead of creating a new input buffer. - - The type `yy_size_t' is an integral type to which you can cast an - integer expression reflecting the size of the buffer. - - -File: flex.info, Node: End-of-file rules, Next: Miscellaneous, Prev: Multiple buffers, Up: Top - -End-of-file rules -================= - - The special rule "<>" indicates actions which are to be taken -when an end-of-file is encountered and yywrap() returns non-zero (i.e., -indicates no further files to process). The action must finish by -doing one of four things: - - - assigning `yyin' to a new input file (in previous versions of - flex, after doing the assignment you had to call the special - action `YY_NEW_FILE'; this is no longer necessary); - - - executing a `return' statement; - - - executing the special `yyterminate()' action; - - - or, switching to a new buffer using `yy_switch_to_buffer()' as - shown in the example above. - - <> rules may not be used with other patterns; they may only be -qualified with a list of start conditions. If an unqualified <> -rule is given, it applies to *all* start conditions which do not -already have <> actions. To specify an <> rule for only the -initial start condition, use - - <> - - These rules are useful for catching things like unclosed comments. -An example: - - %x quote - %% - - ...other rules for dealing with quotes... - - <> { - error( "unterminated quote" ); - yyterminate(); - } - <> { - if ( *++filelist ) - yyin = fopen( *filelist, "r" ); - else - yyterminate(); - } - - -File: flex.info, Node: Miscellaneous, Next: User variables, Prev: End-of-file rules, Up: Top - -Miscellaneous macros -==================== - - The macro `YY_USER_ACTION' can be defined to provide an action which -is always executed prior to the matched rule's action. For example, it -could be #define'd to call a routine to convert yytext to lower-case. -When `YY_USER_ACTION' is invoked, the variable `yy_act' gives the -number of the matched rule (rules are numbered starting with 1). -Suppose you want to profile how often each of your rules is matched. -The following would do the trick: - - #define YY_USER_ACTION ++ctr[yy_act] - - where `ctr' is an array to hold the counts for the different rules. -Note that the macro `YY_NUM_RULES' gives the total number of rules -(including the default rule, even if you use `-s', so a correct -declaration for `ctr' is: - - int ctr[YY_NUM_RULES]; - - The macro `YY_USER_INIT' may be defined to provide an action which -is always executed before the first scan (and before the scanner's -internal initializations are done). For example, it could be used to -call a routine to read in a data table or open a logging file. - - The macro `yy_set_interactive(is_interactive)' can be used to -control whether the current buffer is considered *interactive*. An -interactive buffer is processed more slowly, but must be used when the -scanner's input source is indeed interactive to avoid problems due to -waiting to fill buffers (see the discussion of the `-I' flag below). A -non-zero value in the macro invocation marks the buffer as interactive, -a zero value as non-interactive. Note that use of this macro overrides -`%option always-interactive' or `%option never-interactive' (see -Options below). `yy_set_interactive()' must be invoked prior to -beginning to scan the buffer that is (or is not) to be considered -interactive. - - The macro `yy_set_bol(at_bol)' can be used to control whether the -current buffer's scanning context for the next token match is done as -though at the beginning of a line. A non-zero macro argument makes -rules anchored with - - The macro `YY_AT_BOL()' returns true if the next token scanned from -the current buffer will have '^' rules active, false otherwise. - - In the generated scanner, the actions are all gathered in one large -switch statement and separated using `YY_BREAK', which may be -redefined. By default, it is simply a "break", to separate each rule's -action from the following rule's. Redefining `YY_BREAK' allows, for -example, C++ users to #define YY_BREAK to do nothing (while being very -careful that every rule ends with a "break" or a "return"!) to avoid -suffering from unreachable statement warnings where because a rule's -action ends with "return", the `YY_BREAK' is inaccessible. - - -File: flex.info, Node: User variables, Next: YACC interface, Prev: Miscellaneous, Up: Top - -Values available to the user -============================ - - This section summarizes the various values available to the user in -the rule actions. - - - `char *yytext' holds the text of the current token. It may be - modified but not lengthened (you cannot append characters to the - end). - - If the special directive `%array' appears in the first section of - the scanner description, then `yytext' is instead declared `char - yytext[YYLMAX]', where `YYLMAX' is a macro definition that you can - redefine in the first section if you don't like the default value - (generally 8KB). Using `%array' results in somewhat slower - scanners, but the value of `yytext' becomes immune to calls to - `input()' and `unput()', which potentially destroy its value when - `yytext' is a character pointer. The opposite of `%array' is - `%pointer', which is the default. - - You cannot use `%array' when generating C++ scanner classes (the - `-+' flag). - - - `int yyleng' holds the length of the current token. - - - `FILE *yyin' is the file which by default `flex' reads from. It - may be redefined but doing so only makes sense before scanning - begins or after an EOF has been encountered. Changing it in the - midst of scanning will have unexpected results since `flex' - buffers its input; use `yyrestart()' instead. Once scanning - terminates because an end-of-file has been seen, you can assign - `yyin' at the new input file and then call the scanner again to - continue scanning. - - - `void yyrestart( FILE *new_file )' may be called to point `yyin' - at the new input file. The switch-over to the new file is - immediate (any previously buffered-up input is lost). Note that - calling `yyrestart()' with `yyin' as an argument thus throws away - the current input buffer and continues scanning the same input - file. - - - `FILE *yyout' is the file to which `ECHO' actions are done. It - can be reassigned by the user. - - - `YY_CURRENT_BUFFER' returns a `YY_BUFFER_STATE' handle to the - current buffer. - - - `YY_START' returns an integer value corresponding to the current - start condition. You can subsequently use this value with `BEGIN' - to return to that start condition. - - -File: flex.info, Node: YACC interface, Next: Options, Prev: User variables, Up: Top - -Interfacing with `yacc' -======================= - - One of the main uses of `flex' is as a companion to the `yacc' -parser-generator. `yacc' parsers expect to call a routine named -`yylex()' to find the next input token. The routine is supposed to -return the type of the next token as well as putting any associated -value in the global `yylval'. To use `flex' with `yacc', one specifies -the `-d' option to `yacc' to instruct it to generate the file `y.tab.h' -containing definitions of all the `%tokens' appearing in the `yacc' -input. This file is then included in the `flex' scanner. For example, -if one of the tokens is "TOK_NUMBER", part of the scanner might look -like: - - %{ - #include "y.tab.h" - %} - - %% - - [0-9]+ yylval = atoi( yytext ); return TOK_NUMBER; - - -File: flex.info, Node: Options, Next: Performance, Prev: YACC interface, Up: Top - -Options -======= - - `flex' has the following options: - -`-b' - Generate backing-up information to `lex.backup'. This is a list - of scanner states which require backing up and the input - characters on which they do so. By adding rules one can remove - backing-up states. If *all* backing-up states are eliminated and - `-Cf' or `-CF' is used, the generated scanner will run faster (see - the `-p' flag). Only users who wish to squeeze every last cycle - out of their scanners need worry about this option. (See the - section on Performance Considerations below.) - -`-c' - is a do-nothing, deprecated option included for POSIX compliance. - -`-d' - makes the generated scanner run in "debug" mode. Whenever a - pattern is recognized and the global `yy_flex_debug' is non-zero - (which is the default), the scanner will write to `stderr' a line - of the form: - - --accepting rule at line 53 ("the matched text") - - The line number refers to the location of the rule in the file - defining the scanner (i.e., the file that was fed to flex). - Messages are also generated when the scanner backs up, accepts the - default rule, reaches the end of its input buffer (or encounters a - NUL; at this point, the two look the same as far as the scanner's - concerned), or reaches an end-of-file. - -`-f' - specifies "fast scanner". No table compression is done and stdio - is bypassed. The result is large but fast. This option is - equivalent to `-Cfr' (see below). - -`-h' - generates a "help" summary of `flex's' options to `stdout' and - then exits. `-?' and `--help' are synonyms for `-h'. - -`-i' - instructs `flex' to generate a *case-insensitive* scanner. The - case of letters given in the `flex' input patterns will be - ignored, and tokens in the input will be matched regardless of - case. The matched text given in `yytext' will have the preserved - case (i.e., it will not be folded). - -`-l' - turns on maximum compatibility with the original AT&T `lex' - implementation. Note that this does not mean *full* - compatibility. Use of this option costs a considerable amount of - performance, and it cannot be used with the `-+, -f, -F, -Cf', or - `-CF' options. For details on the compatibilities it provides, see - the section "Incompatibilities With Lex And POSIX" below. This - option also results in the name `YY_FLEX_LEX_COMPAT' being - #define'd in the generated scanner. - -`-n' - is another do-nothing, deprecated option included only for POSIX - compliance. - -`-p' - generates a performance report to stderr. The report consists of - comments regarding features of the `flex' input file which will - cause a serious loss of performance in the resulting scanner. If - you give the flag twice, you will also get comments regarding - features that lead to minor performance losses. - - Note that the use of `REJECT', `%option yylineno' and variable - trailing context (see the Deficiencies / Bugs section below) - entails a substantial performance penalty; use of `yymore()', the - `^' operator, and the `-I' flag entail minor performance penalties. - -`-s' - causes the "default rule" (that unmatched scanner input is echoed - to `stdout') to be suppressed. If the scanner encounters input - that does not match any of its rules, it aborts with an error. - This option is useful for finding holes in a scanner's rule set. - -`-t' - instructs `flex' to write the scanner it generates to standard - output instead of `lex.yy.c'. - -`-v' - specifies that `flex' should write to `stderr' a summary of - statistics regarding the scanner it generates. Most of the - statistics are meaningless to the casual `flex' user, but the - first line identifies the version of `flex' (same as reported by - `-V'), and the next line the flags used when generating the - scanner, including those that are on by default. - -`-w' - suppresses warning messages. - -`-B' - instructs `flex' to generate a *batch* scanner, the opposite of - *interactive* scanners generated by `-I' (see below). In general, - you use `-B' when you are *certain* that your scanner will never - be used interactively, and you want to squeeze a *little* more - performance out of it. If your goal is instead to squeeze out a - *lot* more performance, you should be using the `-Cf' or `-CF' - options (discussed below), which turn on `-B' automatically anyway. - -`-F' - specifies that the "fast" scanner table representation should be - used (and stdio bypassed). This representation is about as fast - as the full table representation `(-f)', and for some sets of - patterns will be considerably smaller (and for others, larger). - In general, if the pattern set contains both "keywords" and a - catch-all, "identifier" rule, such as in the set: - - "case" return TOK_CASE; - "switch" return TOK_SWITCH; - ... - "default" return TOK_DEFAULT; - [a-z]+ return TOK_ID; - - then you're better off using the full table representation. If - only the "identifier" rule is present and you then use a hash - table or some such to detect the keywords, you're better off using - `-F'. - - This option is equivalent to `-CFr' (see below). It cannot be - used with `-+'. - -`-I' - instructs `flex' to generate an *interactive* scanner. An - interactive scanner is one that only looks ahead to decide what - token has been matched if it absolutely must. It turns out that - always looking one extra character ahead, even if the scanner has - already seen enough text to disambiguate the current token, is a - bit faster than only looking ahead when necessary. But scanners - that always look ahead give dreadful interactive performance; for - example, when a user types a newline, it is not recognized as a - newline token until they enter *another* token, which often means - typing in another whole line. - - `Flex' scanners default to *interactive* unless you use the `-Cf' - or `-CF' table-compression options (see below). That's because if - you're looking for high-performance you should be using one of - these options, so if you didn't, `flex' assumes you'd rather trade - off a bit of run-time performance for intuitive interactive - behavior. Note also that you *cannot* use `-I' in conjunction - with `-Cf' or `-CF'. Thus, this option is not really needed; it - is on by default for all those cases in which it is allowed. - - You can force a scanner to *not* be interactive by using `-B' (see - above). - -`-L' - instructs `flex' not to generate `#line' directives. Without this - option, `flex' peppers the generated scanner with #line directives - so error messages in the actions will be correctly located with - respect to either the original `flex' input file (if the errors - are due to code in the input file), or `lex.yy.c' (if the errors - are `flex's' fault - you should report these sorts of errors to - the email address given below). - -`-T' - makes `flex' run in `trace' mode. It will generate a lot of - messages to `stderr' concerning the form of the input and the - resultant non-deterministic and deterministic finite automata. - This option is mostly for use in maintaining `flex'. - -`-V' - prints the version number to `stdout' and exits. `--version' is a - synonym for `-V'. - -`-7' - instructs `flex' to generate a 7-bit scanner, i.e., one which can - only recognized 7-bit characters in its input. The advantage of - using `-7' is that the scanner's tables can be up to half the size - of those generated using the `-8' option (see below). The - disadvantage is that such scanners often hang or crash if their - input contains an 8-bit character. - - Note, however, that unless you generate your scanner using the - `-Cf' or `-CF' table compression options, use of `-7' will save - only a small amount of table space, and make your scanner - considerably less portable. `Flex's' default behavior is to - generate an 8-bit scanner unless you use the `-Cf' or `-CF', in - which case `flex' defaults to generating 7-bit scanners unless - your site was always configured to generate 8-bit scanners (as - will often be the case with non-USA sites). You can tell whether - flex generated a 7-bit or an 8-bit scanner by inspecting the flag - summary in the `-v' output as described above. - - Note that if you use `-Cfe' or `-CFe' (those table compression - options, but also using equivalence classes as discussed see - below), flex still defaults to generating an 8-bit scanner, since - usually with these compression options full 8-bit tables are not - much more expensive than 7-bit tables. - -`-8' - instructs `flex' to generate an 8-bit scanner, i.e., one which can - recognize 8-bit characters. This flag is only needed for scanners - generated using `-Cf' or `-CF', as otherwise flex defaults to - generating an 8-bit scanner anyway. - - See the discussion of `-7' above for flex's default behavior and - the tradeoffs between 7-bit and 8-bit scanners. - -`-+' - specifies that you want flex to generate a C++ scanner class. See - the section on Generating C++ Scanners below for details. - -`-C[aefFmr]' - controls the degree of table compression and, more generally, - trade-offs between small scanners and fast scanners. - - `-Ca' ("align") instructs flex to trade off larger tables in the - generated scanner for faster performance because the elements of - the tables are better aligned for memory access and computation. - On some RISC architectures, fetching and manipulating long-words - is more efficient than with smaller-sized units such as - shortwords. This option can double the size of the tables used by - your scanner. - - `-Ce' directs `flex' to construct "equivalence classes", i.e., - sets of characters which have identical lexical properties (for - example, if the only appearance of digits in the `flex' input is - in the character class "[0-9]" then the digits '0', '1', ..., '9' - will all be put in the same equivalence class). Equivalence - classes usually give dramatic reductions in the final table/object - file sizes (typically a factor of 2-5) and are pretty cheap - performance-wise (one array look-up per character scanned). - - `-Cf' specifies that the *full* scanner tables should be generated - - `flex' should not compress the tables by taking advantages of - similar transition functions for different states. - - `-CF' specifies that the alternate fast scanner representation - (described above under the `-F' flag) should be used. This option - cannot be used with `-+'. - - `-Cm' directs `flex' to construct "meta-equivalence classes", - which are sets of equivalence classes (or characters, if - equivalence classes are not being used) that are commonly used - together. Meta-equivalence classes are often a big win when using - compressed tables, but they have a moderate performance impact - (one or two "if" tests and one array look-up per character - scanned). - - `-Cr' causes the generated scanner to *bypass* use of the standard - I/O library (stdio) for input. Instead of calling `fread()' or - `getc()', the scanner will use the `read()' system call, resulting - in a performance gain which varies from system to system, but in - general is probably negligible unless you are also using `-Cf' or - `-CF'. Using `-Cr' can cause strange behavior if, for example, - you read from `yyin' using stdio prior to calling the scanner - (because the scanner will miss whatever text your previous reads - left in the stdio input buffer). - - `-Cr' has no effect if you define `YY_INPUT' (see The Generated - Scanner above). - - A lone `-C' specifies that the scanner tables should be compressed - but neither equivalence classes nor meta-equivalence classes - should be used. - - The options `-Cf' or `-CF' and `-Cm' do not make sense together - - there is no opportunity for meta-equivalence classes if the table - is not being compressed. Otherwise the options may be freely - mixed, and are cumulative. - - The default setting is `-Cem', which specifies that `flex' should - generate equivalence classes and meta-equivalence classes. This - setting provides the highest degree of table compression. You can - trade off faster-executing scanners at the cost of larger tables - with the following generally being true: - - slowest & smallest - -Cem - -Cm - -Ce - -C - -C{f,F}e - -C{f,F} - -C{f,F}a - fastest & largest - - Note that scanners with the smallest tables are usually generated - and compiled the quickest, so during development you will usually - want to use the default, maximal compression. - - `-Cfe' is often a good compromise between speed and size for - production scanners. - -`-ooutput' - directs flex to write the scanner to the file `out-' `put' instead - of `lex.yy.c'. If you combine `-o' with the `-t' option, then the - scanner is written to `stdout' but its `#line' directives (see the - `-L' option above) refer to the file `output'. - -`-Pprefix' - changes the default `yy' prefix used by `flex' for all - globally-visible variable and function names to instead be PREFIX. - For example, `-Pfoo' changes the name of `yytext' to `footext'. - It also changes the name of the default output file from - `lex.yy.c' to `lex.foo.c'. Here are all of the names affected: - - yy_create_buffer - yy_delete_buffer - yy_flex_debug - yy_init_buffer - yy_flush_buffer - yy_load_buffer_state - yy_switch_to_buffer - yyin - yyleng - yylex - yylineno - yyout - yyrestart - yytext - yywrap - - (If you are using a C++ scanner, then only `yywrap' and - `yyFlexLexer' are affected.) Within your scanner itself, you can - still refer to the global variables and functions using either - version of their name; but externally, they have the modified name. - - This option lets you easily link together multiple `flex' programs - into the same executable. Note, though, that using this option - also renames `yywrap()', so you now *must* either provide your own - (appropriately-named) version of the routine for your scanner, or - use `%option noyywrap', as linking with `-lfl' no longer provides - one for you by default. - -`-Sskeleton_file' - overrides the default skeleton file from which `flex' constructs - its scanners. You'll never need this option unless you are doing - `flex' maintenance or development. - - `flex' also provides a mechanism for controlling options within the -scanner specification itself, rather than from the flex command-line. -This is done by including `%option' directives in the first section of -the scanner specification. You can specify multiple options with a -single `%option' directive, and multiple directives in the first -section of your flex input file. Most options are given simply as -names, optionally preceded by the word "no" (with no intervening -whitespace) to negate their meaning. A number are equivalent to flex -flags or their negation: - - 7bit -7 option - 8bit -8 option - align -Ca option - backup -b option - batch -B option - c++ -+ option - - caseful or - case-sensitive opposite of -i (default) - - case-insensitive or - caseless -i option - - debug -d option - default opposite of -s option - ecs -Ce option - fast -F option - full -f option - interactive -I option - lex-compat -l option - meta-ecs -Cm option - perf-report -p option - read -Cr option - stdout -t option - verbose -v option - warn opposite of -w option - (use "%option nowarn" for -w) - - array equivalent to "%array" - pointer equivalent to "%pointer" (default) - - Some `%option's' provide features otherwise not available: - -`always-interactive' - instructs flex to generate a scanner which always considers its - input "interactive". Normally, on each new input file the scanner - calls `isatty()' in an attempt to determine whether the scanner's - input source is interactive and thus should be read a character at - a time. When this option is used, however, then no such call is - made. - -`main' - directs flex to provide a default `main()' program for the - scanner, which simply calls `yylex()'. This option implies - `noyywrap' (see below). - -`never-interactive' - instructs flex to generate a scanner which never considers its - input "interactive" (again, no call made to `isatty())'. This is - the opposite of `always-' *interactive*. - -`stack' - enables the use of start condition stacks (see Start Conditions - above). - -`stdinit' - if unset (i.e., `%option nostdinit') initializes `yyin' and - `yyout' to nil `FILE' pointers, instead of `stdin' and `stdout'. - -`yylineno' - directs `flex' to generate a scanner that maintains the number of - the current line read from its input in the global variable - `yylineno'. This option is implied by `%option lex-compat'. - -`yywrap' - if unset (i.e., `%option noyywrap'), makes the scanner not call - `yywrap()' upon an end-of-file, but simply assume that there are - no more files to scan (until the user points `yyin' at a new file - and calls `yylex()' again). - - `flex' scans your rule actions to determine whether you use the -`REJECT' or `yymore()' features. The `reject' and `yymore' options are -available to override its decision as to whether you use the options, -either by setting them (e.g., `%option reject') to indicate the feature -is indeed used, or unsetting them to indicate it actually is not used -(e.g., `%option noyymore'). - - Three options take string-delimited values, offset with '=': - - %option outfile="ABC" - -is equivalent to `-oABC', and - - %option prefix="XYZ" - -is equivalent to `-PXYZ'. - - Finally, - - %option yyclass="foo" - -only applies when generating a C++ scanner (`-+' option). It informs -`flex' that you have derived `foo' as a subclass of `yyFlexLexer' so -`flex' will place your actions in the member function `foo::yylex()' -instead of `yyFlexLexer::yylex()'. It also generates a -`yyFlexLexer::yylex()' member function that emits a run-time error (by -invoking `yyFlexLexer::LexerError()') if called. See Generating C++ -Scanners, below, for additional information. - - A number of options are available for lint purists who want to -suppress the appearance of unneeded routines in the generated scanner. -Each of the following, if unset, results in the corresponding routine -not appearing in the generated scanner: - - input, unput - yy_push_state, yy_pop_state, yy_top_state - yy_scan_buffer, yy_scan_bytes, yy_scan_string - -(though `yy_push_state()' and friends won't appear anyway unless you -use `%option stack'). - - -File: flex.info, Node: Performance, Next: C++, Prev: Options, Up: Top - -Performance considerations -========================== - - The main design goal of `flex' is that it generate high-performance -scanners. It has been optimized for dealing well with large sets of -rules. Aside from the effects on scanner speed of the table -compression `-C' options outlined above, there are a number of -options/actions which degrade performance. These are, from most -expensive to least: - - REJECT - %option yylineno - arbitrary trailing context - - pattern sets that require backing up - %array - %option interactive - %option always-interactive - - '^' beginning-of-line operator - yymore() - - with the first three all being quite expensive and the last two -being quite cheap. Note also that `unput()' is implemented as a -routine call that potentially does quite a bit of work, while -`yyless()' is a quite-cheap macro; so if just putting back some excess -text you scanned, use `yyless()'. - - `REJECT' should be avoided at all costs when performance is -important. It is a particularly expensive option. - - Getting rid of backing up is messy and often may be an enormous -amount of work for a complicated scanner. In principal, one begins by -using the `-b' flag to generate a `lex.backup' file. For example, on -the input - - %% - foo return TOK_KEYWORD; - foobar return TOK_KEYWORD; - -the file looks like: - - State #6 is non-accepting - - associated rule line numbers: - 2 3 - out-transitions: [ o ] - jam-transitions: EOF [ \001-n p-\177 ] - - State #8 is non-accepting - - associated rule line numbers: - 3 - out-transitions: [ a ] - jam-transitions: EOF [ \001-` b-\177 ] - - State #9 is non-accepting - - associated rule line numbers: - 3 - out-transitions: [ r ] - jam-transitions: EOF [ \001-q s-\177 ] - - Compressed tables always back up. - - The first few lines tell us that there's a scanner state in which it -can make a transition on an 'o' but not on any other character, and -that in that state the currently scanned text does not match any rule. -The state occurs when trying to match the rules found at lines 2 and 3 -in the input file. If the scanner is in that state and then reads -something other than an 'o', it will have to back up to find a rule -which is matched. With a bit of head-scratching one can see that this -must be the state it's in when it has seen "fo". When this has -happened, if anything other than another 'o' is seen, the scanner will -have to back up to simply match the 'f' (by the default rule). - - The comment regarding State #8 indicates there's a problem when -"foob" has been scanned. Indeed, on any character other than an 'a', -the scanner will have to back up to accept "foo". Similarly, the -comment for State #9 concerns when "fooba" has been scanned and an 'r' -does not follow. - - The final comment reminds us that there's no point going to all the -trouble of removing backing up from the rules unless we're using `-Cf' -or `-CF', since there's no performance gain doing so with compressed -scanners. - - The way to remove the backing up is to add "error" rules: - - %% - foo return TOK_KEYWORD; - foobar return TOK_KEYWORD; - - fooba | - foob | - fo { - /* false alarm, not really a keyword */ - return TOK_ID; - } - - Eliminating backing up among a list of keywords can also be done -using a "catch-all" rule: - - %% - foo return TOK_KEYWORD; - foobar return TOK_KEYWORD; - - [a-z]+ return TOK_ID; - - This is usually the best solution when appropriate. - - Backing up messages tend to cascade. With a complicated set of -rules it's not uncommon to get hundreds of messages. If one can -decipher them, though, it often only takes a dozen or so rules to -eliminate the backing up (though it's easy to make a mistake and have -an error rule accidentally match a valid token. A possible future -`flex' feature will be to automatically add rules to eliminate backing -up). - - It's important to keep in mind that you gain the benefits of -eliminating backing up only if you eliminate *every* instance of -backing up. Leaving just one means you gain nothing. - - VARIABLE trailing context (where both the leading and trailing parts -do not have a fixed length) entails almost the same performance loss as -`REJECT' (i.e., substantial). So when possible a rule like: - - %% - mouse|rat/(cat|dog) run(); - -is better written: - - %% - mouse/cat|dog run(); - rat/cat|dog run(); - -or as - - %% - mouse|rat/cat run(); - mouse|rat/dog run(); - - Note that here the special '|' action does *not* provide any -savings, and can even make things worse (see Deficiencies / Bugs below). - - Another area where the user can increase a scanner's performance -(and one that's easier to implement) arises from the fact that the -longer the tokens matched, the faster the scanner will run. This is -because with long tokens the processing of most input characters takes -place in the (short) inner scanning loop, and does not often have to go -through the additional work of setting up the scanning environment -(e.g., `yytext') for the action. Recall the scanner for C comments: - - %x comment - %% - int line_num = 1; - - "/*" BEGIN(comment); - - [^*\n]* - "*"+[^*/\n]* - \n ++line_num; - "*"+"/" BEGIN(INITIAL); - - This could be sped up by writing it as: - - %x comment - %% - int line_num = 1; - - "/*" BEGIN(comment); - - [^*\n]* - [^*\n]*\n ++line_num; - "*"+[^*/\n]* - "*"+[^*/\n]*\n ++line_num; - "*"+"/" BEGIN(INITIAL); - - Now instead of each newline requiring the processing of another -action, recognizing the newlines is "distributed" over the other rules -to keep the matched text as long as possible. Note that *adding* rules -does *not* slow down the scanner! The speed of the scanner is -independent of the number of rules or (modulo the considerations given -at the beginning of this section) how complicated the rules are with -regard to operators such as '*' and '|'. - - A final example in speeding up a scanner: suppose you want to scan -through a file containing identifiers and keywords, one per line and -with no other extraneous characters, and recognize all the keywords. A -natural first approach is: - - %% - asm | - auto | - break | - ... etc ... - volatile | - while /* it's a keyword */ - - .|\n /* it's not a keyword */ - - To eliminate the back-tracking, introduce a catch-all rule: - - %% - asm | - auto | - break | - ... etc ... - volatile | - while /* it's a keyword */ - - [a-z]+ | - .|\n /* it's not a keyword */ - - Now, if it's guaranteed that there's exactly one word per line, then -we can reduce the total number of matches by a half by merging in the -recognition of newlines with that of the other tokens: - - %% - asm\n | - auto\n | - break\n | - ... etc ... - volatile\n | - while\n /* it's a keyword */ - - [a-z]+\n | - .|\n /* it's not a keyword */ - - One has to be careful here, as we have now reintroduced backing up -into the scanner. In particular, while *we* know that there will never -be any characters in the input stream other than letters or newlines, -`flex' can't figure this out, and it will plan for possibly needing to -back up when it has scanned a token like "auto" and then the next -character is something other than a newline or a letter. Previously it -would then just match the "auto" rule and be done, but now it has no -"auto" rule, only a "auto\n" rule. To eliminate the possibility of -backing up, we could either duplicate all rules but without final -newlines, or, since we never expect to encounter such an input and -therefore don't how it's classified, we can introduce one more -catch-all rule, this one which doesn't include a newline: - - %% - asm\n | - auto\n | - break\n | - ... etc ... - volatile\n | - while\n /* it's a keyword */ - - [a-z]+\n | - [a-z]+ | - .|\n /* it's not a keyword */ - - Compiled with `-Cf', this is about as fast as one can get a `flex' -scanner to go for this particular problem. - - A final note: `flex' is slow when matching NUL's, particularly when -a token contains multiple NUL's. It's best to write rules which match -*short* amounts of text if it's anticipated that the text will often -include NUL's. - - Another final note regarding performance: as mentioned above in the -section How the Input is Matched, dynamically resizing `yytext' to -accommodate huge tokens is a slow process because it presently requires -that the (huge) token be rescanned from the beginning. Thus if -performance is vital, you should attempt to match "large" quantities of -text but not "huge" quantities, where the cutoff between the two is at -about 8K characters/token. - - -File: flex.info, Node: C++, Next: Incompatibilities, Prev: Performance, Up: Top - -Generating C++ scanners -======================= - - `flex' provides two different ways to generate scanners for use with -C++. The first way is to simply compile a scanner generated by `flex' -using a C++ compiler instead of a C compiler. You should not encounter -any compilations errors (please report any you find to the email address -given in the Author section below). You can then use C++ code in your -rule actions instead of C code. Note that the default input source for -your scanner remains `yyin', and default echoing is still done to -`yyout'. Both of these remain `FILE *' variables and not C++ `streams'. - - You can also use `flex' to generate a C++ scanner class, using the -`-+' option, (or, equivalently, `%option c++'), which is automatically -specified if the name of the flex executable ends in a `+', such as -`flex++'. When using this option, flex defaults to generating the -scanner to the file `lex.yy.cc' instead of `lex.yy.c'. The generated -scanner includes the header file `FlexLexer.h', which defines the -interface to two C++ classes. - - The first class, `FlexLexer', provides an abstract base class -defining the general scanner class interface. It provides the -following member functions: - -`const char* YYText()' - returns the text of the most recently matched token, the - equivalent of `yytext'. - -`int YYLeng()' - returns the length of the most recently matched token, the - equivalent of `yyleng'. - -`int lineno() const' - returns the current input line number (see `%option yylineno'), or - 1 if `%option yylineno' was not used. - -`void set_debug( int flag )' - sets the debugging flag for the scanner, equivalent to assigning to - `yy_flex_debug' (see the Options section above). Note that you - must build the scanner using `%option debug' to include debugging - information in it. - -`int debug() const' - returns the current setting of the debugging flag. - - Also provided are member functions equivalent to -`yy_switch_to_buffer(), yy_create_buffer()' (though the first argument -is an `istream*' object pointer and not a `FILE*', `yy_flush_buffer()', -`yy_delete_buffer()', and `yyrestart()' (again, the first argument is a -`istream*' object pointer). - - The second class defined in `FlexLexer.h' is `yyFlexLexer', which is -derived from `FlexLexer'. It defines the following additional member -functions: - -`yyFlexLexer( istream* arg_yyin = 0, ostream* arg_yyout = 0 )' - constructs a `yyFlexLexer' object using the given streams for - input and output. If not specified, the streams default to `cin' - and `cout', respectively. - -`virtual int yylex()' - performs the same role is `yylex()' does for ordinary flex - scanners: it scans the input stream, consuming tokens, until a - rule's action returns a value. If you derive a subclass S from - `yyFlexLexer' and want to access the member functions and - variables of S inside `yylex()', then you need to use `%option - yyclass="S"' to inform `flex' that you will be using that subclass - instead of `yyFlexLexer'. In this case, rather than generating - `yyFlexLexer::yylex()', `flex' generates `S::yylex()' (and also - generates a dummy `yyFlexLexer::yylex()' that calls - `yyFlexLexer::LexerError()' if called). - -`virtual void switch_streams(istream* new_in = 0, ostream* new_out = 0)' - reassigns `yyin' to `new_in' (if non-nil) and `yyout' to `new_out' - (ditto), deleting the previous input buffer if `yyin' is - reassigned. - -`int yylex( istream* new_in = 0, ostream* new_out = 0 )' - first switches the input streams via `switch_streams( new_in, - new_out )' and then returns the value of `yylex()'. - - In addition, `yyFlexLexer' defines the following protected virtual -functions which you can redefine in derived classes to tailor the -scanner: - -`virtual int LexerInput( char* buf, int max_size )' - reads up to `max_size' characters into BUF and returns the number - of characters read. To indicate end-of-input, return 0 - characters. Note that "interactive" scanners (see the `-B' and - `-I' flags) define the macro `YY_INTERACTIVE'. If you redefine - `LexerInput()' and need to take different actions depending on - whether or not the scanner might be scanning an interactive input - source, you can test for the presence of this name via `#ifdef'. - -`virtual void LexerOutput( const char* buf, int size )' - writes out SIZE characters from the buffer BUF, which, while - NUL-terminated, may also contain "internal" NUL's if the scanner's - rules can match text with NUL's in them. - -`virtual void LexerError( const char* msg )' - reports a fatal error message. The default version of this - function writes the message to the stream `cerr' and exits. - - Note that a `yyFlexLexer' object contains its *entire* scanning -state. Thus you can use such objects to create reentrant scanners. -You can instantiate multiple instances of the same `yyFlexLexer' class, -and you can also combine multiple C++ scanner classes together in the -same program using the `-P' option discussed above. Finally, note that -the `%array' feature is not available to C++ scanner classes; you must -use `%pointer' (the default). - - Here is an example of a simple C++ scanner: - - // An example of using the flex C++ scanner class. - - %{ - int mylineno = 0; - %} - - string \"[^\n"]+\" - - ws [ \t]+ - - alpha [A-Za-z] - dig [0-9] - name ({alpha}|{dig}|\$)({alpha}|{dig}|[_.\-/$])* - num1 [-+]?{dig}+\.?([eE][-+]?{dig}+)? - num2 [-+]?{dig}*\.{dig}+([eE][-+]?{dig}+)? - number {num1}|{num2} - - %% - - {ws} /* skip blanks and tabs */ - - "/*" { - int c; - - while((c = yyinput()) != 0) - { - if(c == '\n') - ++mylineno; - - else if(c == '*') - { - if((c = yyinput()) == '/') - break; - else - unput(c); - } - } - } - - {number} cout << "number " << YYText() << '\n'; - - \n mylineno++; - - {name} cout << "name " << YYText() << '\n'; - - {string} cout << "string " << YYText() << '\n'; - - %% - - Version 2.5 December 1994 44 - - int main( int /* argc */, char** /* argv */ ) - { - FlexLexer* lexer = new yyFlexLexer; - while(lexer->yylex() != 0) - ; - return 0; - } - - If you want to create multiple (different) lexer classes, you use -the `-P' flag (or the `prefix=' option) to rename each `yyFlexLexer' to -some other `xxFlexLexer'. You then can include `' in your -other sources once per lexer class, first renaming `yyFlexLexer' as -follows: - - #undef yyFlexLexer - #define yyFlexLexer xxFlexLexer - #include - - #undef yyFlexLexer - #define yyFlexLexer zzFlexLexer - #include - - if, for example, you used `%option prefix="xx"' for one of your -scanners and `%option prefix="zz"' for the other. - - IMPORTANT: the present form of the scanning class is *experimental* -and may change considerably between major releases. - - -File: flex.info, Node: Incompatibilities, Next: Diagnostics, Prev: C++, Up: Top - -Incompatibilities with `lex' and POSIX -====================================== - - `flex' is a rewrite of the AT&T Unix `lex' tool (the two -implementations do not share any code, though), with some extensions -and incompatibilities, both of which are of concern to those who wish -to write scanners acceptable to either implementation. Flex is fully -compliant with the POSIX `lex' specification, except that when using -`%pointer' (the default), a call to `unput()' destroys the contents of -`yytext', which is counter to the POSIX specification. - - In this section we discuss all of the known areas of incompatibility -between flex, AT&T lex, and the POSIX specification. - - `flex's' `-l' option turns on maximum compatibility with the -original AT&T `lex' implementation, at the cost of a major loss in the -generated scanner's performance. We note below which incompatibilities -can be overcome using the `-l' option. - - `flex' is fully compatible with `lex' with the following exceptions: - - - The undocumented `lex' scanner internal variable `yylineno' is not - supported unless `-l' or `%option yylineno' is used. `yylineno' - should be maintained on a per-buffer basis, rather than a - per-scanner (single global variable) basis. `yylineno' is not - part of the POSIX specification. - - - The `input()' routine is not redefinable, though it may be called - to read characters following whatever has been matched by a rule. - If `input()' encounters an end-of-file the normal `yywrap()' - processing is done. A "real" end-of-file is returned by `input()' - as `EOF'. - - Input is instead controlled by defining the `YY_INPUT' macro. - - The `flex' restriction that `input()' cannot be redefined is in - accordance with the POSIX specification, which simply does not - specify any way of controlling the scanner's input other than by - making an initial assignment to `yyin'. - - - The `unput()' routine is not redefinable. This restriction is in - accordance with POSIX. - - - `flex' scanners are not as reentrant as `lex' scanners. In - particular, if you have an interactive scanner and an interrupt - handler which long-jumps out of the scanner, and the scanner is - subsequently called again, you may get the following message: - - fatal flex scanner internal error--end of buffer missed - - To reenter the scanner, first use - - yyrestart( yyin ); - - Note that this call will throw away any buffered input; usually - this isn't a problem with an interactive scanner. - - Also note that flex C++ scanner classes *are* reentrant, so if - using C++ is an option for you, you should use them instead. See - "Generating C++ Scanners" above for details. - - - `output()' is not supported. Output from the `ECHO' macro is done - to the file-pointer `yyout' (default `stdout'). - - `output()' is not part of the POSIX specification. - - - `lex' does not support exclusive start conditions (%x), though - they are in the POSIX specification. - - - When definitions are expanded, `flex' encloses them in - parentheses. With lex, the following: - - NAME [A-Z][A-Z0-9]* - %% - foo{NAME}? printf( "Found it\n" ); - %% - - will not match the string "foo" because when the macro is expanded - the rule is equivalent to "foo[A-Z][A-Z0-9]*?" and the precedence - is such that the '?' is associated with "[A-Z0-9]*". With `flex', - the rule will be expanded to "foo([A-Z][A-Z0-9]*)?" and so the - string "foo" will match. - - Note that if the definition begins with `^' or ends with `$' then - it is *not* expanded with parentheses, to allow these operators to - appear in definitions without losing their special meanings. But - the `, /', and `<>' operators cannot be used in a `flex' - definition. - - Using `-l' results in the `lex' behavior of no parentheses around - the definition. - - The POSIX specification is that the definition be enclosed in - parentheses. - - - Some implementations of `lex' allow a rule's action to begin on a - separate line, if the rule's pattern has trailing whitespace: - - %% - foo|bar - { foobar_action(); } - - `flex' does not support this feature. - - - The `lex' `%r' (generate a Ratfor scanner) option is not - supported. It is not part of the POSIX specification. - - - After a call to `unput()', `yytext' is undefined until the next - token is matched, unless the scanner was built using `%array'. - This is not the case with `lex' or the POSIX specification. The - `-l' option does away with this incompatibility. - - - The precedence of the `{}' (numeric range) operator is different. - `lex' interprets "abc{1,3}" as "match one, two, or three - occurrences of 'abc'", whereas `flex' interprets it as "match 'ab' - followed by one, two, or three occurrences of 'c'". The latter is - in agreement with the POSIX specification. - - - The precedence of the `^' operator is different. `lex' interprets - "^foo|bar" as "match either 'foo' at the beginning of a line, or - 'bar' anywhere", whereas `flex' interprets it as "match either - 'foo' or 'bar' if they come at the beginning of a line". The - latter is in agreement with the POSIX specification. - - - The special table-size declarations such as `%a' supported by - `lex' are not required by `flex' scanners; `flex' ignores them. - - - The name FLEX_SCANNER is #define'd so scanners may be written for - use with either `flex' or `lex'. Scanners also include - `YY_FLEX_MAJOR_VERSION' and `YY_FLEX_MINOR_VERSION' indicating - which version of `flex' generated the scanner (for example, for the - 2.5 release, these defines would be 2 and 5 respectively). - - The following `flex' features are not included in `lex' or the POSIX -specification: - - C++ scanners - %option - start condition scopes - start condition stacks - interactive/non-interactive scanners - yy_scan_string() and friends - yyterminate() - yy_set_interactive() - yy_set_bol() - YY_AT_BOL() - <> - <*> - YY_DECL - YY_START - YY_USER_ACTION - YY_USER_INIT - #line directives - %{}'s around actions - multiple actions on a line - -plus almost all of the flex flags. The last feature in the list refers -to the fact that with `flex' you can put multiple actions on the same -line, separated with semicolons, while with `lex', the following - - foo handle_foo(); ++num_foos_seen; - -is (rather surprisingly) truncated to - - foo handle_foo(); - - `flex' does not truncate the action. Actions that are not enclosed -in braces are simply terminated at the end of the line. - - -File: flex.info, Node: Diagnostics, Next: Files, Prev: Incompatibilities, Up: Top - -Diagnostics -=========== - -`warning, rule cannot be matched' - indicates that the given rule cannot be matched because it follows - other rules that will always match the same text as it. For - example, in the following "foo" cannot be matched because it comes - after an identifier "catch-all" rule: - - [a-z]+ got_identifier(); - foo got_foo(); - - Using `REJECT' in a scanner suppresses this warning. - -`warning, -s option given but default rule can be matched' - means that it is possible (perhaps only in a particular start - condition) that the default rule (match any single character) is - the only one that will match a particular input. Since `-s' was - given, presumably this is not intended. - -`reject_used_but_not_detected undefined' -`yymore_used_but_not_detected undefined' - These errors can occur at compile time. They indicate that the - scanner uses `REJECT' or `yymore()' but that `flex' failed to - notice the fact, meaning that `flex' scanned the first two sections - looking for occurrences of these actions and failed to find any, - but somehow you snuck some in (via a #include file, for example). - Use `%option reject' or `%option yymore' to indicate to flex that - you really do use these features. - -`flex scanner jammed' - a scanner compiled with `-s' has encountered an input string which - wasn't matched by any of its rules. This error can also occur due - to internal problems. - -`token too large, exceeds YYLMAX' - your scanner uses `%array' and one of its rules matched a string - longer than the `YYL-' `MAX' constant (8K bytes by default). You - can increase the value by #define'ing `YYLMAX' in the definitions - section of your `flex' input. - -`scanner requires -8 flag to use the character 'X'' - Your scanner specification includes recognizing the 8-bit - character X and you did not specify the -8 flag, and your scanner - defaulted to 7-bit because you used the `-Cf' or `-CF' table - compression options. See the discussion of the `-7' flag for - details. - -`flex scanner push-back overflow' - you used `unput()' to push back so much text that the scanner's - buffer could not hold both the pushed-back text and the current - token in `yytext'. Ideally the scanner should dynamically resize - the buffer in this case, but at present it does not. - -`input buffer overflow, can't enlarge buffer because scanner uses REJECT' - the scanner was working on matching an extremely large token and - needed to expand the input buffer. This doesn't work with - scanners that use `REJECT'. - -`fatal flex scanner internal error--end of buffer missed' - This can occur in an scanner which is reentered after a long-jump - has jumped out (or over) the scanner's activation frame. Before - reentering the scanner, use: - - yyrestart( yyin ); - - or, as noted above, switch to using the C++ scanner class. - -`too many start conditions in <> construct!' - you listed more start conditions in a <> construct than exist (so - you must have listed at least one of them twice). - - -File: flex.info, Node: Files, Next: Deficiencies, Prev: Diagnostics, Up: Top - -Files -===== - -`-lfl' - library with which scanners must be linked. - -`lex.yy.c' - generated scanner (called `lexyy.c' on some systems). - -`lex.yy.cc' - generated C++ scanner class, when using `-+'. - -`' - header file defining the C++ scanner base class, `FlexLexer', and - its derived class, `yyFlexLexer'. - -`flex.skl' - skeleton scanner. This file is only used when building flex, not - when flex executes. - -`lex.backup' - backing-up information for `-b' flag (called `lex.bck' on some - systems). - - -File: flex.info, Node: Deficiencies, Next: See also, Prev: Files, Up: Top - -Deficiencies / Bugs -=================== - - Some trailing context patterns cannot be properly matched and -generate warning messages ("dangerous trailing context"). These are -patterns where the ending of the first part of the rule matches the -beginning of the second part, such as "zx*/xy*", where the 'x*' matches -the 'x' at the beginning of the trailing context. (Note that the POSIX -draft states that the text matched by such patterns is undefined.) - - For some trailing context rules, parts which are actually -fixed-length are not recognized as such, leading to the abovementioned -performance loss. In particular, parts using '|' or {n} (such as -"foo{3}") are always considered variable-length. - - Combining trailing context with the special '|' action can result in -*fixed* trailing context being turned into the more expensive VARIABLE -trailing context. For example, in the following: - - %% - abc | - xyz/def - - Use of `unput()' invalidates yytext and yyleng, unless the `%array' -directive or the `-l' option has been used. - - Pattern-matching of NUL's is substantially slower than matching -other characters. - - Dynamic resizing of the input buffer is slow, as it entails -rescanning all the text matched so far by the current (generally huge) -token. - - Due to both buffering of input and read-ahead, you cannot intermix -calls to routines, such as, for example, `getchar()', with -`flex' rules and expect it to work. Call `input()' instead. - - The total table entries listed by the `-v' flag excludes the number -of table entries needed to determine what rule has been matched. The -number of entries is equal to the number of DFA states if the scanner -does not use `REJECT', and somewhat greater than the number of states -if it does. - - `REJECT' cannot be used with the `-f' or `-F' options. - - The `flex' internal algorithms need documentation. - - -File: flex.info, Node: See also, Next: Author, Prev: Deficiencies, Up: Top - -See also -======== - - `lex'(1), `yacc'(1), `sed'(1), `awk'(1). - - John Levine, Tony Mason, and Doug Brown: Lex & Yacc; O'Reilly and -Associates. Be sure to get the 2nd edition. - - M. E. Lesk and E. Schmidt, LEX - Lexical Analyzer Generator. - - Alfred Aho, Ravi Sethi and Jeffrey Ullman: Compilers: Principles, -Techniques and Tools; Addison-Wesley (1986). Describes the -pattern-matching techniques used by `flex' (deterministic finite -automata). - - -File: flex.info, Node: Author, Prev: See also, Up: Top - -Author -====== - - Vern Paxson, with the help of many ideas and much inspiration from -Van Jacobson. Original version by Jef Poskanzer. The fast table -representation is a partial implementation of a design done by Van -Jacobson. The implementation was done by Kevin Gong and Vern Paxson. - - Thanks to the many `flex' beta-testers, feedbackers, and -contributors, especially Francois Pinard, Casey Leedom, Stan Adermann, -Terry Allen, David Barker-Plummer, John Basrai, Nelson H.F. Beebe, -`benson@odi.com', Karl Berry, Peter A. Bigot, Simon Blanchard, Keith -Bostic, Frederic Brehm, Ian Brockbank, Kin Cho, Nick Christopher, Brian -Clapper, J.T. Conklin, Jason Coughlin, Bill Cox, Nick Cropper, Dave -Curtis, Scott David Daniels, Chris G. Demetriou, Theo Deraadt, Mike -Donahue, Chuck Doucette, Tom Epperly, Leo Eskin, Chris Faylor, Chris -Flatters, Jon Forrest, Joe Gayda, Kaveh R. Ghazi, Eric Goldman, -Christopher M. Gould, Ulrich Grepel, Peer Griebel, Jan Hajic, Charles -Hemphill, NORO Hideo, Jarkko Hietaniemi, Scott Hofmann, Jeff Honig, -Dana Hudes, Eric Hughes, John Interrante, Ceriel Jacobs, Michal -Jaegermann, Sakari Jalovaara, Jeffrey R. Jones, Henry Juengst, Klaus -Kaempf, Jonathan I. Kamens, Terrence O Kane, Amir Katz, -`ken@ken.hilco.com', Kevin B. Kenny, Steve Kirsch, Winfried Koenig, -Marq Kole, Ronald Lamprecht, Greg Lee, Rohan Lenard, Craig Leres, John -Levine, Steve Liddle, Mike Long, Mohamed el Lozy, Brian Madsen, Malte, -Joe Marshall, Bengt Martensson, Chris Metcalf, Luke Mewburn, Jim -Meyering, R. Alexander Milowski, Erik Naggum, G.T. Nicol, Landon Noll, -James Nordby, Marc Nozell, Richard Ohnemus, Karsten Pahnke, Sven Panne, -Roland Pesch, Walter Pelissero, Gaumond Pierre, Esmond Pitt, Jef -Poskanzer, Joe Rahmeh, Jarmo Raiha, Frederic Raimbault, Pat Rankin, -Rick Richardson, Kevin Rodgers, Kai Uwe Rommel, Jim Roskind, Alberto -Santini, Andreas Scherer, Darrell Schiebel, Raf Schietekat, Doug -Schmidt, Philippe Schnoebelen, Andreas Schwab, Alex Siegel, Eckehard -Stolz, Jan-Erik Strvmquist, Mike Stump, Paul Stuart, Dave Tallman, Ian -Lance Taylor, Chris Thewalt, Richard M. Timoney, Jodi Tsai, Paul -Tuinenga, Gary Weik, Frank Whaley, Gerhard Wilhelms, Kent Williams, Ken -Yap, Ron Zellar, Nathan Zelle, David Zuhn, and those whose names have -slipped my marginal mail-archiving skills but whose contributions are -appreciated all the same. - - Thanks to Keith Bostic, Jon Forrest, Noah Friedman, John Gilmore, -Craig Leres, John Levine, Bob Mulcahy, G.T. Nicol, Francois Pinard, -Rich Salz, and Richard Stallman for help with various distribution -headaches. - - Thanks to Esmond Pitt and Earle Horton for 8-bit character support; -to Benson Margulies and Fred Burke for C++ support; to Kent Williams -and Tom Epperly for C++ class support; to Ove Ewerlid for support of -NUL's; and to Eric Hughes for support of multiple buffers. - - This work was primarily done when I was with the Real Time Systems -Group at the Lawrence Berkeley Laboratory in Berkeley, CA. Many thanks -to all there for the support I received. - - Send comments to `vern@ee.lbl.gov'. - - - -Tag Table: -Node: Top1430 -Node: Name2808 -Node: Synopsis2933 -Node: Overview3145 -Node: Description4986 -Node: Examples5748 -Node: Format8896 -Node: Patterns11637 -Node: Matching18138 -Node: Actions21438 -Node: Generated scanner30560 -Node: Start conditions34988 -Node: Multiple buffers45069 -Node: End-of-file rules50975 -Node: Miscellaneous52508 -Node: User variables55279 -Node: YACC interface57651 -Node: Options58542 -Node: Performance78234 -Node: C++87532 -Node: Incompatibilities94993 -Node: Diagnostics101853 -Node: Files105094 -Node: Deficiencies105715 -Node: See also107684 -Node: Author108216 - -End Tag Table diff --git a/commands/flex-2.5.4/MISC/texinfo/flex.texi b/commands/flex-2.5.4/MISC/texinfo/flex.texi deleted file mode 100644 index 23280b114..000000000 --- a/commands/flex-2.5.4/MISC/texinfo/flex.texi +++ /dev/null @@ -1,3448 +0,0 @@ -\input texinfo -@c %**start of header -@setfilename flex.info -@settitle Flex - a scanner generator -@c @finalout -@c @setchapternewpage odd -@c %**end of header - -@set EDITION 2.5 -@set UPDATED March 1995 -@set VERSION 2.5 - -@c FIXME - Reread a printed copy with a red pen and patience. -@c FIXME - Modify all "See ..." references and replace with @xref's. - -@ifinfo -@format -START-INFO-DIR-ENTRY -* Flex: (flex). A fast scanner generator. -END-INFO-DIR-ENTRY -@end format -@end ifinfo - -@c Define new indices for commands, filenames, and options. -@c @defcodeindex cm -@c @defcodeindex fl -@c @defcodeindex op - -@c Put everything in one index (arbitrarily chosen to be the concept index). -@c @syncodeindex cm cp -@c @syncodeindex fl cp -@syncodeindex fn cp -@syncodeindex ky cp -@c @syncodeindex op cp -@syncodeindex pg cp -@syncodeindex vr cp - -@ifinfo -This file documents Flex. - -Copyright (c) 1990 The Regents of the University of California. -All rights reserved. - -This code is derived from software contributed to Berkeley by -Vern Paxson. - -The United States Government has rights in this work pursuant -to contract no. DE-AC03-76SF00098 between the United States -Department of Energy and the University of California. - -Redistribution and use in source and binary forms with or without -modification are permitted provided that: (1) source distributions -retain this entire copyright notice and comment, and (2) -distributions including binaries display the following -acknowledgement: ``This product includes software developed by the -University of California, Berkeley and its contributors'' in the -documentation or other materials provided with the distribution and -in all advertising materials mentioning features or use of this -software. Neither the name of the University nor the names of its -contributors may be used to endorse or promote products derived -from this software without specific prior written permission. - -THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR -IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED -WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR -PURPOSE. - -@ignore -Permission is granted to process this file through TeX and print the -results, provided the printed document carries copying permission -notice identical to this one except for the removal of this paragraph -(this paragraph not being relevant to the printed manual). - -@end ignore -@end ifinfo - -@titlepage -@title Flex, version @value{VERSION} -@subtitle A fast scanner generator -@subtitle Edition @value{EDITION}, @value{UPDATED} -@author Vern Paxson - -@page -@vskip 0pt plus 1filll -Copyright @copyright{} 1990 The Regents of the University of California. -All rights reserved. - -This code is derived from software contributed to Berkeley by -Vern Paxson. - -The United States Government has rights in this work pursuant -to contract no. DE-AC03-76SF00098 between the United States -Department of Energy and the University of California. - -Redistribution and use in source and binary forms with or without -modification are permitted provided that: (1) source distributions -retain this entire copyright notice and comment, and (2) -distributions including binaries display the following -acknowledgement: ``This product includes software developed by the -University of California, Berkeley and its contributors'' in the -documentation or other materials provided with the distribution and -in all advertising materials mentioning features or use of this -software. Neither the name of the University nor the names of its -contributors may be used to endorse or promote products derived -from this software without specific prior written permission. - -THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR -IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED -WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR -PURPOSE. -@end titlepage - -@ifinfo - -@node Top, Name, (dir), (dir) -@top flex - -@cindex scanner generator - -This manual documents @code{flex}. It covers release @value{VERSION}. - -@menu -* Name:: Name -* Synopsis:: Synopsis -* Overview:: Overview -* Description:: Description -* Examples:: Some simple examples -* Format:: Format of the input file -* Patterns:: Patterns -* Matching:: How the input is matched -* Actions:: Actions -* Generated scanner:: The generated scanner -* Start conditions:: Start conditions -* Multiple buffers:: Multiple input buffers -* End-of-file rules:: End-of-file rules -* Miscellaneous:: Miscellaneous macros -* User variables:: Values available to the user -* YACC interface:: Interfacing with @code{yacc} -* Options:: Options -* Performance:: Performance considerations -* C++:: Generating C++ scanners -* Incompatibilities:: Incompatibilities with @code{lex} and POSIX -* Diagnostics:: Diagnostics -* Files:: Files -* Deficiencies:: Deficiencies / Bugs -* See also:: See also -* Author:: Author -@c * Index:: Index -@end menu - -@end ifinfo - -@node Name, Synopsis, Top, Top -@section Name - -flex - fast lexical analyzer generator - -@node Synopsis, Overview, Name, Top -@section Synopsis - -@example -flex [-bcdfhilnpstvwBFILTV78+? -C[aefFmr] -ooutput -Pprefix -Sskeleton] -[--help --version] [@var{filename} @dots{}] -@end example - -@node Overview, Description, Synopsis, Top -@section Overview - -This manual describes @code{flex}, a tool for generating programs -that perform pattern-matching on text. The manual -includes both tutorial and reference sections: - -@table @asis -@item Description -a brief overview of the tool - -@item Some Simple Examples - -@item Format Of The Input File - -@item Patterns -the extended regular expressions used by flex - -@item How The Input Is Matched -the rules for determining what has been matched - -@item Actions -how to specify what to do when a pattern is matched - -@item The Generated Scanner -details regarding the scanner that flex produces; -how to control the input source - -@item Start Conditions -introducing context into your scanners, and -managing "mini-scanners" - -@item Multiple Input Buffers -how to manipulate multiple input sources; how to -scan from strings instead of files - -@item End-of-file Rules -special rules for matching the end of the input - -@item Miscellaneous Macros -a summary of macros available to the actions - -@item Values Available To The User -a summary of values available to the actions - -@item Interfacing With Yacc -connecting flex scanners together with yacc parsers - -@item Options -flex command-line options, and the "%option" -directive - -@item Performance Considerations -how to make your scanner go as fast as possible - -@item Generating C++ Scanners -the (experimental) facility for generating C++ -scanner classes - -@item Incompatibilities With Lex And POSIX -how flex differs from AT&T lex and the POSIX lex -standard - -@item Diagnostics -those error messages produced by flex (or scanners -it generates) whose meanings might not be apparent - -@item Files -files used by flex - -@item Deficiencies / Bugs -known problems with flex - -@item See Also -other documentation, related tools - -@item Author -includes contact information -@end table - -@node Description, Examples, Overview, Top -@section Description - -@code{flex} is a tool for generating @dfn{scanners}: programs which -recognized lexical patterns in text. @code{flex} reads the given -input files, or its standard input if no file names are -given, for a description of a scanner to generate. The -description is in the form of pairs of regular expressions -and C code, called @dfn{rules}. @code{flex} generates as output a C -source file, @file{lex.yy.c}, which defines a routine @samp{yylex()}. -This file is compiled and linked with the @samp{-lfl} library to -produce an executable. When the executable is run, it -analyzes its input for occurrences of the regular -expressions. Whenever it finds one, it executes the -corresponding C code. - -@node Examples, Format, Description, Top -@section Some simple examples - -First some simple examples to get the flavor of how one -uses @code{flex}. The following @code{flex} input specifies a scanner -which whenever it encounters the string "username" will -replace it with the user's login name: - -@example -%% -username printf( "%s", getlogin() ); -@end example - -By default, any text not matched by a @code{flex} scanner is -copied to the output, so the net effect of this scanner is -to copy its input file to its output with each occurrence -of "username" expanded. In this input, there is just one -rule. "username" is the @var{pattern} and the "printf" is the -@var{action}. The "%%" marks the beginning of the rules. - -Here's another simple example: - -@example - int num_lines = 0, num_chars = 0; - -%% -\n ++num_lines; ++num_chars; -. ++num_chars; - -%% -main() - @{ - yylex(); - printf( "# of lines = %d, # of chars = %d\n", - num_lines, num_chars ); - @} -@end example - -This scanner counts the number of characters and the -number of lines in its input (it produces no output other -than the final report on the counts). The first line -declares two globals, "num_lines" and "num_chars", which -are accessible both inside @samp{yylex()} and in the @samp{main()} -routine declared after the second "%%". There are two rules, -one which matches a newline ("\n") and increments both the -line count and the character count, and one which matches -any character other than a newline (indicated by the "." -regular expression). - -A somewhat more complicated example: - -@example -/* scanner for a toy Pascal-like language */ - -%@{ -/* need this for the call to atof() below */ -#include -%@} - -DIGIT [0-9] -ID [a-z][a-z0-9]* - -%% - -@{DIGIT@}+ @{ - printf( "An integer: %s (%d)\n", yytext, - atoi( yytext ) ); - @} - -@{DIGIT@}+"."@{DIGIT@}* @{ - printf( "A float: %s (%g)\n", yytext, - atof( yytext ) ); - @} - -if|then|begin|end|procedure|function @{ - printf( "A keyword: %s\n", yytext ); - @} - -@{ID@} printf( "An identifier: %s\n", yytext ); - -"+"|"-"|"*"|"/" printf( "An operator: %s\n", yytext ); - -"@{"[^@}\n]*"@}" /* eat up one-line comments */ - -[ \t\n]+ /* eat up whitespace */ - -. printf( "Unrecognized character: %s\n", yytext ); - -%% - -main( argc, argv ) -int argc; -char **argv; - @{ - ++argv, --argc; /* skip over program name */ - if ( argc > 0 ) - yyin = fopen( argv[0], "r" ); - else - yyin = stdin; - - yylex(); - @} -@end example - -This is the beginnings of a simple scanner for a language -like Pascal. It identifies different types of @var{tokens} and -reports on what it has seen. - -The details of this example will be explained in the -following sections. - -@node Format, Patterns, Examples, Top -@section Format of the input file - -The @code{flex} input file consists of three sections, separated -by a line with just @samp{%%} in it: - -@example -definitions -%% -rules -%% -user code -@end example - -The @dfn{definitions} section contains declarations of simple -@dfn{name} definitions to simplify the scanner specification, -and declarations of @dfn{start conditions}, which are explained -in a later section. -Name definitions have the form: - -@example -name definition -@end example - -The "name" is a word beginning with a letter or an -underscore ('_') followed by zero or more letters, digits, '_', -or '-' (dash). The definition is taken to begin at the -first non-white-space character following the name and -continuing to the end of the line. The definition can -subsequently be referred to using "@{name@}", which will -expand to "(definition)". For example, - -@example -DIGIT [0-9] -ID [a-z][a-z0-9]* -@end example - -@noindent -defines "DIGIT" to be a regular expression which matches a -single digit, and "ID" to be a regular expression which -matches a letter followed by zero-or-more -letters-or-digits. A subsequent reference to - -@example -@{DIGIT@}+"."@{DIGIT@}* -@end example - -@noindent -is identical to - -@example -([0-9])+"."([0-9])* -@end example - -@noindent -and matches one-or-more digits followed by a '.' followed -by zero-or-more digits. - -The @var{rules} section of the @code{flex} input contains a series of -rules of the form: - -@example -pattern action -@end example - -@noindent -where the pattern must be unindented and the action must -begin on the same line. - -See below for a further description of patterns and -actions. - -Finally, the user code section is simply copied to -@file{lex.yy.c} verbatim. It is used for companion routines -which call or are called by the scanner. The presence of -this section is optional; if it is missing, the second @samp{%%} -in the input file may be skipped, too. - -In the definitions and rules sections, any @emph{indented} text or -text enclosed in @samp{%@{} and @samp{%@}} is copied verbatim to the -output (with the @samp{%@{@}}'s removed). The @samp{%@{@}}'s must -appear unindented on lines by themselves. - -In the rules section, any indented or %@{@} text appearing -before the first rule may be used to declare variables -which are local to the scanning routine and (after the -declarations) code which is to be executed whenever the -scanning routine is entered. Other indented or %@{@} text -in the rule section is still copied to the output, but its -meaning is not well-defined and it may well cause -compile-time errors (this feature is present for @code{POSIX} compliance; -see below for other such features). - -In the definitions section (but not in the rules section), -an unindented comment (i.e., a line beginning with "/*") -is also copied verbatim to the output up to the next "*/". - -@node Patterns, Matching, Format, Top -@section Patterns - -The patterns in the input are written using an extended -set of regular expressions. These are: - -@table @samp -@item x -match the character @samp{x} -@item . -any character (byte) except newline -@item [xyz] -a "character class"; in this case, the pattern -matches either an @samp{x}, a @samp{y}, or a @samp{z} -@item [abj-oZ] -a "character class" with a range in it; matches -an @samp{a}, a @samp{b}, any letter from @samp{j} through @samp{o}, -or a @samp{Z} -@item [^A-Z] -a "negated character class", i.e., any character -but those in the class. In this case, any -character EXCEPT an uppercase letter. -@item [^A-Z\n] -any character EXCEPT an uppercase letter or -a newline -@item @var{r}* -zero or more @var{r}'s, where @var{r} is any regular expression -@item @var{r}+ -one or more @var{r}'s -@item @var{r}? -zero or one @var{r}'s (that is, "an optional @var{r}") -@item @var{r}@{2,5@} -anywhere from two to five @var{r}'s -@item @var{r}@{2,@} -two or more @var{r}'s -@item @var{r}@{4@} -exactly 4 @var{r}'s -@item @{@var{name}@} -the expansion of the "@var{name}" definition -(see above) -@item "[xyz]\"foo" -the literal string: @samp{[xyz]"foo} -@item \@var{x} -if @var{x} is an @samp{a}, @samp{b}, @samp{f}, @samp{n}, @samp{r}, @samp{t}, or @samp{v}, -then the ANSI-C interpretation of \@var{x}. -Otherwise, a literal @samp{@var{x}} (used to escape -operators such as @samp{*}) -@item \0 -a NUL character (ASCII code 0) -@item \123 -the character with octal value 123 -@item \x2a -the character with hexadecimal value @code{2a} -@item (@var{r}) -match an @var{r}; parentheses are used to override -precedence (see below) -@item @var{r}@var{s} -the regular expression @var{r} followed by the -regular expression @var{s}; called "concatenation" -@item @var{r}|@var{s} -either an @var{r} or an @var{s} -@item @var{r}/@var{s} -an @var{r} but only if it is followed by an @var{s}. The text -matched by @var{s} is included when determining whether this rule is -the @dfn{longest match}, but is then returned to the input before -the action is executed. So the action only sees the text matched -by @var{r}. This type of pattern is called @dfn{trailing context}. -(There are some combinations of @samp{@var{r}/@var{s}} that @code{flex} -cannot match correctly; see notes in the Deficiencies / Bugs section -below regarding "dangerous trailing context".) -@item ^@var{r} -an @var{r}, but only at the beginning of a line (i.e., -which just starting to scan, or right after a -newline has been scanned). -@item @var{r}$ -an @var{r}, but only at the end of a line (i.e., just -before a newline). Equivalent to "@var{r}/\n". - -Note that flex's notion of "newline" is exactly -whatever the C compiler used to compile flex -interprets '\n' as; in particular, on some DOS -systems you must either filter out \r's in the -input yourself, or explicitly use @var{r}/\r\n for "r$". -@item <@var{s}>@var{r} -an @var{r}, but only in start condition @var{s} (see -below for discussion of start conditions) -<@var{s1},@var{s2},@var{s3}>@var{r} -same, but in any of start conditions @var{s1}, -@var{s2}, or @var{s3} -@item <*>@var{r} -an @var{r} in any start condition, even an exclusive one. -@item <> -an end-of-file -<@var{s1},@var{s2}><> -an end-of-file when in start condition @var{s1} or @var{s2} -@end table - -Note that inside of a character class, all regular -expression operators lose their special meaning except escape -('\') and the character class operators, '-', ']', and, at -the beginning of the class, '^'. - -The regular expressions listed above are grouped according -to precedence, from highest precedence at the top to -lowest at the bottom. Those grouped together have equal -precedence. For example, - -@example -foo|bar* -@end example - -@noindent -is the same as - -@example -(foo)|(ba(r*)) -@end example - -@noindent -since the '*' operator has higher precedence than -concatenation, and concatenation higher than alternation ('|'). -This pattern therefore matches @emph{either} the string "foo" @emph{or} -the string "ba" followed by zero-or-more r's. To match -"foo" or zero-or-more "bar"'s, use: - -@example -foo|(bar)* -@end example - -@noindent -and to match zero-or-more "foo"'s-or-"bar"'s: - -@example -(foo|bar)* -@end example - -In addition to characters and ranges of characters, -character classes can also contain character class -@dfn{expressions}. These are expressions enclosed inside @samp{[}: and @samp{:}] -delimiters (which themselves must appear between the '[' -and ']' of the character class; other elements may occur -inside the character class, too). The valid expressions -are: - -@example -[:alnum:] [:alpha:] [:blank:] -[:cntrl:] [:digit:] [:graph:] -[:lower:] [:print:] [:punct:] -[:space:] [:upper:] [:xdigit:] -@end example - -These expressions all designate a set of characters -equivalent to the corresponding standard C @samp{isXXX} function. For -example, @samp{[:alnum:]} designates those characters for which -@samp{isalnum()} returns true - i.e., any alphabetic or numeric. -Some systems don't provide @samp{isblank()}, so flex defines -@samp{[:blank:]} as a blank or a tab. - -For example, the following character classes are all -equivalent: - -@example -[[:alnum:]] -[[:alpha:][:digit:] -[[:alpha:]0-9] -[a-zA-Z0-9] -@end example - -If your scanner is case-insensitive (the @samp{-i} flag), then -@samp{[:upper:]} and @samp{[:lower:]} are equivalent to @samp{[:alpha:]}. - -Some notes on patterns: - -@itemize - -@item -A negated character class such as the example -"[^A-Z]" above @emph{will match a newline} unless "\n" (or an -equivalent escape sequence) is one of the -characters explicitly present in the negated character -class (e.g., "[^A-Z\n]"). This is unlike how many -other regular expression tools treat negated -character classes, but unfortunately the inconsistency -is historically entrenched. Matching newlines -means that a pattern like [^"]* can match the -entire input unless there's another quote in the -input. - -@item -A rule can have at most one instance of trailing -context (the '/' operator or the '$' operator). -The start condition, '^', and "<>" patterns -can only occur at the beginning of a pattern, and, -as well as with '/' and '$', cannot be grouped -inside parentheses. A '^' which does not occur at -the beginning of a rule or a '$' which does not -occur at the end of a rule loses its special -properties and is treated as a normal character. - -The following are illegal: - -@example -foo/bar$ -foobar -@end example - -Note that the first of these, can be written -"foo/bar\n". - -The following will result in '$' or '^' being -treated as a normal character: - -@example -foo|(bar$) -foo|^bar -@end example - -If what's wanted is a "foo" or a -bar-followed-by-a-newline, the following could be used (the special -'|' action is explained below): - -@example -foo | -bar$ /* action goes here */ -@end example - -A similar trick will work for matching a foo or a -bar-at-the-beginning-of-a-line. -@end itemize - -@node Matching, Actions, Patterns, Top -@section How the input is matched - -When the generated scanner is run, it analyzes its input -looking for strings which match any of its patterns. If -it finds more than one match, it takes the one matching -the most text (for trailing context rules, this includes -the length of the trailing part, even though it will then -be returned to the input). If it finds two or more -matches of the same length, the rule listed first in the -@code{flex} input file is chosen. - -Once the match is determined, the text corresponding to -the match (called the @var{token}) is made available in the -global character pointer @code{yytext}, and its length in the -global integer @code{yyleng}. The @var{action} corresponding to the -matched pattern is then executed (a more detailed -description of actions follows), and then the remaining input is -scanned for another match. - -If no match is found, then the @dfn{default rule} is executed: -the next character in the input is considered matched and -copied to the standard output. Thus, the simplest legal -@code{flex} input is: - -@example -%% -@end example - -which generates a scanner that simply copies its input -(one character at a time) to its output. - -Note that @code{yytext} can be defined in two different ways: -either as a character @emph{pointer} or as a character @emph{array}. -You can control which definition @code{flex} uses by including -one of the special directives @samp{%pointer} or @samp{%array} in the -first (definitions) section of your flex input. The -default is @samp{%pointer}, unless you use the @samp{-l} lex -compatibility option, in which case @code{yytext} will be an array. The -advantage of using @samp{%pointer} is substantially faster -scanning and no buffer overflow when matching very large -tokens (unless you run out of dynamic memory). The -disadvantage is that you are restricted in how your actions can -modify @code{yytext} (see the next section), and calls to the -@samp{unput()} function destroys the present contents of @code{yytext}, -which can be a considerable porting headache when moving -between different @code{lex} versions. - -The advantage of @samp{%array} is that you can then modify @code{yytext} -to your heart's content, and calls to @samp{unput()} do not -destroy @code{yytext} (see below). Furthermore, existing @code{lex} -programs sometimes access @code{yytext} externally using -declarations of the form: -@example -extern char yytext[]; -@end example -This definition is erroneous when used with @samp{%pointer}, but -correct for @samp{%array}. - -@samp{%array} defines @code{yytext} to be an array of @code{YYLMAX} characters, -which defaults to a fairly large value. You can change -the size by simply #define'ing @code{YYLMAX} to a different value -in the first section of your @code{flex} input. As mentioned -above, with @samp{%pointer} yytext grows dynamically to -accommodate large tokens. While this means your @samp{%pointer} scanner -can accommodate very large tokens (such as matching entire -blocks of comments), bear in mind that each time the -scanner must resize @code{yytext} it also must rescan the entire -token from the beginning, so matching such tokens can -prove slow. @code{yytext} presently does @emph{not} dynamically grow if -a call to @samp{unput()} results in too much text being pushed -back; instead, a run-time error results. - -Also note that you cannot use @samp{%array} with C++ scanner -classes (the @code{c++} option; see below). - -@node Actions, Generated scanner, Matching, Top -@section Actions - -Each pattern in a rule has a corresponding action, which -can be any arbitrary C statement. The pattern ends at the -first non-escaped whitespace character; the remainder of -the line is its action. If the action is empty, then when -the pattern is matched the input token is simply -discarded. For example, here is the specification for a -program which deletes all occurrences of "zap me" from its -input: - -@example -%% -"zap me" -@end example - -(It will copy all other characters in the input to the -output since they will be matched by the default rule.) - -Here is a program which compresses multiple blanks and -tabs down to a single blank, and throws away whitespace -found at the end of a line: - -@example -%% -[ \t]+ putchar( ' ' ); -[ \t]+$ /* ignore this token */ -@end example - -If the action contains a '@{', then the action spans till -the balancing '@}' is found, and the action may cross -multiple lines. @code{flex} knows about C strings and comments and -won't be fooled by braces found within them, but also -allows actions to begin with @samp{%@{} and will consider the -action to be all the text up to the next @samp{%@}} (regardless of -ordinary braces inside the action). - -An action consisting solely of a vertical bar ('|') means -"same as the action for the next rule." See below for an -illustration. - -Actions can include arbitrary C code, including @code{return} -statements to return a value to whatever routine called -@samp{yylex()}. Each time @samp{yylex()} is called it continues -processing tokens from where it last left off until it either -reaches the end of the file or executes a return. - -Actions are free to modify @code{yytext} except for lengthening -it (adding characters to its end--these will overwrite -later characters in the input stream). This however does -not apply when using @samp{%array} (see above); in that case, -@code{yytext} may be freely modified in any way. - -Actions are free to modify @code{yyleng} except they should not -do so if the action also includes use of @samp{yymore()} (see -below). - -There are a number of special directives which can be -included within an action: - -@itemize - -@item -@samp{ECHO} copies yytext to the scanner's output. - -@item -@code{BEGIN} followed by the name of a start condition -places the scanner in the corresponding start -condition (see below). - -@item -@code{REJECT} directs the scanner to proceed on to the -"second best" rule which matched the input (or a -prefix of the input). The rule is chosen as -described above in "How the Input is Matched", and -@code{yytext} and @code{yyleng} set up appropriately. It may -either be one which matched as much text as the -originally chosen rule but came later in the @code{flex} -input file, or one which matched less text. For -example, the following will both count the words in -the input and call the routine special() whenever -"frob" is seen: - -@example - int word_count = 0; -%% - -frob special(); REJECT; -[^ \t\n]+ ++word_count; -@end example - -Without the @code{REJECT}, any "frob"'s in the input would -not be counted as words, since the scanner normally -executes only one action per token. Multiple -@code{REJECT's} are allowed, each one finding the next -best choice to the currently active rule. For -example, when the following scanner scans the token -"abcd", it will write "abcdabcaba" to the output: - -@example -%% -a | -ab | -abc | -abcd ECHO; REJECT; -.|\n /* eat up any unmatched character */ -@end example - -(The first three rules share the fourth's action -since they use the special '|' action.) @code{REJECT} is -a particularly expensive feature in terms of -scanner performance; if it is used in @emph{any} of the -scanner's actions it will slow down @emph{all} of the -scanner's matching. Furthermore, @code{REJECT} cannot be used -with the @samp{-Cf} or @samp{-CF} options (see below). - -Note also that unlike the other special actions, -@code{REJECT} is a @emph{branch}; code immediately following it -in the action will @emph{not} be executed. - -@item -@samp{yymore()} tells the scanner that the next time it -matches a rule, the corresponding token should be -@emph{appended} onto the current value of @code{yytext} rather -than replacing it. For example, given the input -"mega-kludge" the following will write -"mega-mega-kludge" to the output: - -@example -%% -mega- ECHO; yymore(); -kludge ECHO; -@end example - -First "mega-" is matched and echoed to the output. -Then "kludge" is matched, but the previous "mega-" -is still hanging around at the beginning of @code{yytext} -so the @samp{ECHO} for the "kludge" rule will actually -write "mega-kludge". -@end itemize - -Two notes regarding use of @samp{yymore()}. First, @samp{yymore()} -depends on the value of @code{yyleng} correctly reflecting the -size of the current token, so you must not modify @code{yyleng} -if you are using @samp{yymore()}. Second, the presence of -@samp{yymore()} in the scanner's action entails a minor -performance penalty in the scanner's matching speed. - -@itemize - -@item -@samp{yyless(n)} returns all but the first @var{n} characters of -the current token back to the input stream, where -they will be rescanned when the scanner looks for -the next match. @code{yytext} and @code{yyleng} are adjusted -appropriately (e.g., @code{yyleng} will now be equal to @var{n} -). For example, on the input "foobar" the -following will write out "foobarbar": - -@example -%% -foobar ECHO; yyless(3); -[a-z]+ ECHO; -@end example - -An argument of 0 to @code{yyless} will cause the entire -current input string to be scanned again. Unless -you've changed how the scanner will subsequently -process its input (using @code{BEGIN}, for example), this -will result in an endless loop. - -Note that @code{yyless} is a macro and can only be used in the -flex input file, not from other source files. - -@item -@samp{unput(c)} puts the character @code{c} back onto the input -stream. It will be the next character scanned. -The following action will take the current token -and cause it to be rescanned enclosed in -parentheses. - -@example -@{ -int i; -/* Copy yytext because unput() trashes yytext */ -char *yycopy = strdup( yytext ); -unput( ')' ); -for ( i = yyleng - 1; i >= 0; --i ) - unput( yycopy[i] ); -unput( '(' ); -free( yycopy ); -@} -@end example - -Note that since each @samp{unput()} puts the given -character back at the @emph{beginning} of the input stream, -pushing back strings must be done back-to-front. -An important potential problem when using @samp{unput()} is that -if you are using @samp{%pointer} (the default), a call to @samp{unput()} -@emph{destroys} the contents of @code{yytext}, starting with its -rightmost character and devouring one character to the left -with each call. If you need the value of yytext preserved -after a call to @samp{unput()} (as in the above example), you -must either first copy it elsewhere, or build your scanner -using @samp{%array} instead (see How The Input Is Matched). - -Finally, note that you cannot put back @code{EOF} to attempt to -mark the input stream with an end-of-file. - -@item -@samp{input()} reads the next character from the input -stream. For example, the following is one way to -eat up C comments: - -@example -%% -"/*" @{ - register int c; - - for ( ; ; ) - @{ - while ( (c = input()) != '*' && - c != EOF ) - ; /* eat up text of comment */ - - if ( c == '*' ) - @{ - while ( (c = input()) == '*' ) - ; - if ( c == '/' ) - break; /* found the end */ - @} - - if ( c == EOF ) - @{ - error( "EOF in comment" ); - break; - @} - @} - @} -@end example - -(Note that if the scanner is compiled using @samp{C++}, -then @samp{input()} is instead referred to as @samp{yyinput()}, -in order to avoid a name clash with the @samp{C++} stream -by the name of @code{input}.) - -@item YY_FLUSH_BUFFER -flushes the scanner's internal buffer so that the next time the scanner -attempts to match a token, it will first refill the buffer using -@code{YY_INPUT} (see The Generated Scanner, below). This action is -a special case of the more general @samp{yy_flush_buffer()} function, -described below in the section Multiple Input Buffers. - -@item -@samp{yyterminate()} can be used in lieu of a return -statement in an action. It terminates the scanner -and returns a 0 to the scanner's caller, indicating -"all done". By default, @samp{yyterminate()} is also -called when an end-of-file is encountered. It is a -macro and may be redefined. -@end itemize - -@node Generated scanner, Start conditions, Actions, Top -@section The generated scanner - -The output of @code{flex} is the file @file{lex.yy.c}, which contains -the scanning routine @samp{yylex()}, a number of tables used by -it for matching tokens, and a number of auxiliary routines -and macros. By default, @samp{yylex()} is declared as follows: - -@example -int yylex() - @{ - @dots{} various definitions and the actions in here @dots{} - @} -@end example - -(If your environment supports function prototypes, then it -will be "int yylex( void )".) This definition may be -changed by defining the "YY_DECL" macro. For example, you -could use: - -@example -#define YY_DECL float lexscan( a, b ) float a, b; -@end example - -to give the scanning routine the name @code{lexscan}, returning a -float, and taking two floats as arguments. Note that if -you give arguments to the scanning routine using a -K&R-style/non-prototyped function declaration, you must -terminate the definition with a semi-colon (@samp{;}). - -Whenever @samp{yylex()} is called, it scans tokens from the -global input file @code{yyin} (which defaults to stdin). It -continues until it either reaches an end-of-file (at which -point it returns the value 0) or one of its actions -executes a @code{return} statement. - -If the scanner reaches an end-of-file, subsequent calls are undefined -unless either @code{yyin} is pointed at a new input file (in which case -scanning continues from that file), or @samp{yyrestart()} is called. -@samp{yyrestart()} takes one argument, a @samp{FILE *} pointer (which -can be nil, if you've set up @code{YY_INPUT} to scan from a source -other than @code{yyin}), and initializes @code{yyin} for scanning from -that file. Essentially there is no difference between just assigning -@code{yyin} to a new input file or using @samp{yyrestart()} to do so; -the latter is available for compatibility with previous versions of -@code{flex}, and because it can be used to switch input files in the -middle of scanning. It can also be used to throw away the current -input buffer, by calling it with an argument of @code{yyin}; but -better is to use @code{YY_FLUSH_BUFFER} (see above). Note that -@samp{yyrestart()} does @emph{not} reset the start condition to -@code{INITIAL} (see Start Conditions, below). - - -If @samp{yylex()} stops scanning due to executing a @code{return} -statement in one of the actions, the scanner may then be called -again and it will resume scanning where it left off. - -By default (and for purposes of efficiency), the scanner -uses block-reads rather than simple @samp{getc()} calls to read -characters from @code{yyin}. The nature of how it gets its input -can be controlled by defining the @code{YY_INPUT} macro. -YY_INPUT's calling sequence is -"YY_INPUT(buf,result,max_size)". Its action is to place -up to @var{max_size} characters in the character array @var{buf} and -return in the integer variable @var{result} either the number of -characters read or the constant YY_NULL (0 on Unix -systems) to indicate EOF. The default YY_INPUT reads from -the global file-pointer "yyin". - -A sample definition of YY_INPUT (in the definitions -section of the input file): - -@example -%@{ -#define YY_INPUT(buf,result,max_size) \ - @{ \ - int c = getchar(); \ - result = (c == EOF) ? YY_NULL : (buf[0] = c, 1); \ - @} -%@} -@end example - -This definition will change the input processing to occur -one character at a time. - -When the scanner receives an end-of-file indication from -YY_INPUT, it then checks the @samp{yywrap()} function. If -@samp{yywrap()} returns false (zero), then it is assumed that the -function has gone ahead and set up @code{yyin} to point to -another input file, and scanning continues. If it returns -true (non-zero), then the scanner terminates, returning 0 -to its caller. Note that in either case, the start -condition remains unchanged; it does @emph{not} revert to @code{INITIAL}. - -If you do not supply your own version of @samp{yywrap()}, then you -must either use @samp{%option noyywrap} (in which case the scanner -behaves as though @samp{yywrap()} returned 1), or you must link with -@samp{-lfl} to obtain the default version of the routine, which always -returns 1. - -Three routines are available for scanning from in-memory -buffers rather than files: @samp{yy_scan_string()}, -@samp{yy_scan_bytes()}, and @samp{yy_scan_buffer()}. See the discussion -of them below in the section Multiple Input Buffers. - -The scanner writes its @samp{ECHO} output to the @code{yyout} global -(default, stdout), which may be redefined by the user -simply by assigning it to some other @code{FILE} pointer. - -@node Start conditions, Multiple buffers, Generated scanner, Top -@section Start conditions - -@code{flex} provides a mechanism for conditionally activating -rules. Any rule whose pattern is prefixed with "" -will only be active when the scanner is in the start -condition named "sc". For example, - -@example -[^"]* @{ /* eat up the string body ... */ - @dots{} - @} -@end example - -@noindent -will be active only when the scanner is in the "STRING" -start condition, and - -@example -\. @{ /* handle an escape ... */ - @dots{} - @} -@end example - -@noindent -will be active only when the current start condition is -either "INITIAL", "STRING", or "QUOTE". - -Start conditions are declared in the definitions (first) -section of the input using unindented lines beginning with -either @samp{%s} or @samp{%x} followed by a list of names. The former -declares @emph{inclusive} start conditions, the latter @emph{exclusive} -start conditions. A start condition is activated using -the @code{BEGIN} action. Until the next @code{BEGIN} action is -executed, rules with the given start condition will be active -and rules with other start conditions will be inactive. -If the start condition is @emph{inclusive}, then rules with no -start conditions at all will also be active. If it is -@emph{exclusive}, then @emph{only} rules qualified with the start -condition will be active. A set of rules contingent on the -same exclusive start condition describe a scanner which is -independent of any of the other rules in the @code{flex} input. -Because of this, exclusive start conditions make it easy -to specify "mini-scanners" which scan portions of the -input that are syntactically different from the rest -(e.g., comments). - -If the distinction between inclusive and exclusive start -conditions is still a little vague, here's a simple -example illustrating the connection between the two. The set -of rules: - -@example -%s example -%% - -foo do_something(); - -bar something_else(); -@end example - -@noindent -is equivalent to - -@example -%x example -%% - -foo do_something(); - -bar something_else(); -@end example - -Without the @samp{} qualifier, the @samp{bar} pattern -in the second example wouldn't be active (i.e., couldn't match) when -in start condition @samp{example}. If we just used @samp{} -to qualify @samp{bar}, though, then it would only be active in -@samp{example} and not in @code{INITIAL}, while in the first example -it's active in both, because in the first example the @samp{example} -starting condition is an @emph{inclusive} (@samp{%s}) start condition. - -Also note that the special start-condition specifier @samp{<*>} -matches every start condition. Thus, the above example -could also have been written; - -@example -%x example -%% - -foo do_something(); - -<*>bar something_else(); -@end example - -The default rule (to @samp{ECHO} any unmatched character) remains -active in start conditions. It is equivalent to: - -@example -<*>.|\\n ECHO; -@end example - -@samp{BEGIN(0)} returns to the original state where only the -rules with no start conditions are active. This state can -also be referred to as the start-condition "INITIAL", so -@samp{BEGIN(INITIAL)} is equivalent to @samp{BEGIN(0)}. (The -parentheses around the start condition name are not required but -are considered good style.) - -@code{BEGIN} actions can also be given as indented code at the -beginning of the rules section. For example, the -following will cause the scanner to enter the "SPECIAL" start -condition whenever @samp{yylex()} is called and the global -variable @code{enter_special} is true: - -@example - int enter_special; - -%x SPECIAL -%% - if ( enter_special ) - BEGIN(SPECIAL); - -blahblahblah -@dots{}more rules follow@dots{} -@end example - -To illustrate the uses of start conditions, here is a -scanner which provides two different interpretations of a -string like "123.456". By default it will treat it as as -three tokens, the integer "123", a dot ('.'), and the -integer "456". But if the string is preceded earlier in -the line by the string "expect-floats" it will treat it as -a single token, the floating-point number 123.456: - -@example -%@{ -#include -%@} -%s expect - -%% -expect-floats BEGIN(expect); - -[0-9]+"."[0-9]+ @{ - printf( "found a float, = %f\n", - atof( yytext ) ); - @} -\n @{ - /* that's the end of the line, so - * we need another "expect-number" - * before we'll recognize any more - * numbers - */ - BEGIN(INITIAL); - @} - -[0-9]+ @{ - -Version 2.5 December 1994 18 - - printf( "found an integer, = %d\n", - atoi( yytext ) ); - @} - -"." printf( "found a dot\n" ); -@end example - -Here is a scanner which recognizes (and discards) C -comments while maintaining a count of the current input line. - -@example -%x comment -%% - int line_num = 1; - -"/*" BEGIN(comment); - -[^*\n]* /* eat anything that's not a '*' */ -"*"+[^*/\n]* /* eat up '*'s not followed by '/'s */ -\n ++line_num; -"*"+"/" BEGIN(INITIAL); -@end example - -This scanner goes to a bit of trouble to match as much -text as possible with each rule. In general, when -attempting to write a high-speed scanner try to match as -much possible in each rule, as it's a big win. - -Note that start-conditions names are really integer values -and can be stored as such. Thus, the above could be -extended in the following fashion: - -@example -%x comment foo -%% - int line_num = 1; - int comment_caller; - -"/*" @{ - comment_caller = INITIAL; - BEGIN(comment); - @} - -@dots{} - -"/*" @{ - comment_caller = foo; - BEGIN(comment); - @} - -[^*\n]* /* eat anything that's not a '*' */ -"*"+[^*/\n]* /* eat up '*'s not followed by '/'s */ -\n ++line_num; -"*"+"/" BEGIN(comment_caller); -@end example - -Furthermore, you can access the current start condition -using the integer-valued @code{YY_START} macro. For example, the -above assignments to @code{comment_caller} could instead be -written - -@example -comment_caller = YY_START; -@end example - -Flex provides @code{YYSTATE} as an alias for @code{YY_START} (since that -is what's used by AT&T @code{lex}). - -Note that start conditions do not have their own -name-space; %s's and %x's declare names in the same fashion as -#define's. - -Finally, here's an example of how to match C-style quoted -strings using exclusive start conditions, including -expanded escape sequences (but not including checking for -a string that's too long): - -@example -%x str - -%% - char string_buf[MAX_STR_CONST]; - char *string_buf_ptr; - -\" string_buf_ptr = string_buf; BEGIN(str); - -\" @{ /* saw closing quote - all done */ - BEGIN(INITIAL); - *string_buf_ptr = '\0'; - /* return string constant token type and - * value to parser - */ - @} - -\n @{ - /* error - unterminated string constant */ - /* generate error message */ - @} - -\\[0-7]@{1,3@} @{ - /* octal escape sequence */ - int result; - - (void) sscanf( yytext + 1, "%o", &result ); - - if ( result > 0xff ) - /* error, constant is out-of-bounds */ - - *string_buf_ptr++ = result; - @} - -\\[0-9]+ @{ - /* generate error - bad escape sequence; something - * like '\48' or '\0777777' - */ - @} - -\\n *string_buf_ptr++ = '\n'; -\\t *string_buf_ptr++ = '\t'; -\\r *string_buf_ptr++ = '\r'; -\\b *string_buf_ptr++ = '\b'; -\\f *string_buf_ptr++ = '\f'; - -\\(.|\n) *string_buf_ptr++ = yytext[1]; - -[^\\\n\"]+ @{ - char *yptr = yytext; - - while ( *yptr ) - *string_buf_ptr++ = *yptr++; - @} -@end example - -Often, such as in some of the examples above, you wind up -writing a whole bunch of rules all preceded by the same -start condition(s). Flex makes this a little easier and -cleaner by introducing a notion of start condition @dfn{scope}. -A start condition scope is begun with: - -@example -@{ -@end example - -@noindent -where SCs is a list of one or more start conditions. -Inside the start condition scope, every rule automatically -has the prefix @samp{} applied to it, until a @samp{@}} which -matches the initial @samp{@{}. So, for example, - -@example -@{ - "\\n" return '\n'; - "\\r" return '\r'; - "\\f" return '\f'; - "\\0" return '\0'; -@} -@end example - -@noindent -is equivalent to: - -@example -"\\n" return '\n'; -"\\r" return '\r'; -"\\f" return '\f'; -"\\0" return '\0'; -@end example - -Start condition scopes may be nested. - -Three routines are available for manipulating stacks of -start conditions: - -@table @samp -@item void yy_push_state(int new_state) -pushes the current start condition onto the top of -the start condition stack and switches to @var{new_state} -as though you had used @samp{BEGIN new_state} (recall that -start condition names are also integers). - -@item void yy_pop_state() -pops the top of the stack and switches to it via -@code{BEGIN}. - -@item int yy_top_state() -returns the top of the stack without altering the -stack's contents. -@end table - -The start condition stack grows dynamically and so has no -built-in size limitation. If memory is exhausted, program -execution aborts. - -To use start condition stacks, your scanner must include a -@samp{%option stack} directive (see Options below). - -@node Multiple buffers, End-of-file rules, Start conditions, Top -@section Multiple input buffers - -Some scanners (such as those which support "include" -files) require reading from several input streams. As -@code{flex} scanners do a large amount of buffering, one cannot -control where the next input will be read from by simply -writing a @code{YY_INPUT} which is sensitive to the scanning -context. @code{YY_INPUT} is only called when the scanner reaches -the end of its buffer, which may be a long time after -scanning a statement such as an "include" which requires -switching the input source. - -To negotiate these sorts of problems, @code{flex} provides a -mechanism for creating and switching between multiple -input buffers. An input buffer is created by using: - -@example -YY_BUFFER_STATE yy_create_buffer( FILE *file, int size ) -@end example - -@noindent -which takes a @code{FILE} pointer and a size and creates a buffer -associated with the given file and large enough to hold -@var{size} characters (when in doubt, use @code{YY_BUF_SIZE} for the -size). It returns a @code{YY_BUFFER_STATE} handle, which may -then be passed to other routines (see below). The -@code{YY_BUFFER_STATE} type is a pointer to an opaque @code{struct} -@code{yy_buffer_state} structure, so you may safely initialize -YY_BUFFER_STATE variables to @samp{((YY_BUFFER_STATE) 0)} if you -wish, and also refer to the opaque structure in order to -correctly declare input buffers in source files other than -that of your scanner. Note that the @code{FILE} pointer in the -call to @code{yy_create_buffer} is only used as the value of @code{yyin} -seen by @code{YY_INPUT}; if you redefine @code{YY_INPUT} so it no longer -uses @code{yyin}, then you can safely pass a nil @code{FILE} pointer to -@code{yy_create_buffer}. You select a particular buffer to scan -from using: - -@example -void yy_switch_to_buffer( YY_BUFFER_STATE new_buffer ) -@end example - -switches the scanner's input buffer so subsequent tokens -will come from @var{new_buffer}. Note that -@samp{yy_switch_to_buffer()} may be used by @samp{yywrap()} to set -things up for continued scanning, instead of opening a new -file and pointing @code{yyin} at it. Note also that switching -input sources via either @samp{yy_switch_to_buffer()} or @samp{yywrap()} -does @emph{not} change the start condition. - -@example -void yy_delete_buffer( YY_BUFFER_STATE buffer ) -@end example - -@noindent -is used to reclaim the storage associated with a buffer. -You can also clear the current contents of a buffer using: - -@example -void yy_flush_buffer( YY_BUFFER_STATE buffer ) -@end example - -This function discards the buffer's contents, so the next time the -scanner attempts to match a token from the buffer, it will first fill -the buffer anew using @code{YY_INPUT}. - -@samp{yy_new_buffer()} is an alias for @samp{yy_create_buffer()}, -provided for compatibility with the C++ use of @code{new} and @code{delete} -for creating and destroying dynamic objects. - -Finally, the @code{YY_CURRENT_BUFFER} macro returns a -@code{YY_BUFFER_STATE} handle to the current buffer. - -Here is an example of using these features for writing a -scanner which expands include files (the @samp{<>} feature -is discussed below): - -@example -/* the "incl" state is used for picking up the name - * of an include file - */ -%x incl - -%@{ -#define MAX_INCLUDE_DEPTH 10 -YY_BUFFER_STATE include_stack[MAX_INCLUDE_DEPTH]; -int include_stack_ptr = 0; -%@} - -%% -include BEGIN(incl); - -[a-z]+ ECHO; -[^a-z\n]*\n? ECHO; - -[ \t]* /* eat the whitespace */ -[^ \t\n]+ @{ /* got the include file name */ - if ( include_stack_ptr >= MAX_INCLUDE_DEPTH ) - @{ - fprintf( stderr, "Includes nested too deeply" ); - exit( 1 ); - @} - - include_stack[include_stack_ptr++] = - YY_CURRENT_BUFFER; - - yyin = fopen( yytext, "r" ); - - if ( ! yyin ) - error( @dots{} ); - - yy_switch_to_buffer( - yy_create_buffer( yyin, YY_BUF_SIZE ) ); - - BEGIN(INITIAL); - @} - -<> @{ - if ( --include_stack_ptr < 0 ) - @{ - yyterminate(); - @} - - else - @{ - yy_delete_buffer( YY_CURRENT_BUFFER ); - yy_switch_to_buffer( - include_stack[include_stack_ptr] ); - @} - @} -@end example - -Three routines are available for setting up input buffers -for scanning in-memory strings instead of files. All of -them create a new input buffer for scanning the string, -and return a corresponding @code{YY_BUFFER_STATE} handle (which -you should delete with @samp{yy_delete_buffer()} when done with -it). They also switch to the new buffer using -@samp{yy_switch_to_buffer()}, so the next call to @samp{yylex()} will -start scanning the string. - -@table @samp -@item yy_scan_string(const char *str) -scans a NUL-terminated string. - -@item yy_scan_bytes(const char *bytes, int len) -scans @code{len} bytes (including possibly NUL's) starting -at location @var{bytes}. -@end table - -Note that both of these functions create and scan a @emph{copy} -of the string or bytes. (This may be desirable, since -@samp{yylex()} modifies the contents of the buffer it is -scanning.) You can avoid the copy by using: - -@table @samp -@item yy_scan_buffer(char *base, yy_size_t size) -which scans in place the buffer starting at @var{base}, -consisting of @var{size} bytes, the last two bytes of -which @emph{must} be @code{YY_END_OF_BUFFER_CHAR} (ASCII NUL). -These last two bytes are not scanned; thus, -scanning consists of @samp{base[0]} through @samp{base[size-2]}, -inclusive. - -If you fail to set up @var{base} in this manner (i.e., -forget the final two @code{YY_END_OF_BUFFER_CHAR} bytes), -then @samp{yy_scan_buffer()} returns a nil pointer instead -of creating a new input buffer. - -The type @code{yy_size_t} is an integral type to which you -can cast an integer expression reflecting the size -of the buffer. -@end table - -@node End-of-file rules, Miscellaneous, Multiple buffers, Top -@section End-of-file rules - -The special rule "<>" indicates actions which are to -be taken when an end-of-file is encountered and yywrap() -returns non-zero (i.e., indicates no further files to -process). The action must finish by doing one of four -things: - -@itemize - -@item -assigning @code{yyin} to a new input file (in previous -versions of flex, after doing the assignment you -had to call the special action @code{YY_NEW_FILE}; this is -no longer necessary); - -@item -executing a @code{return} statement; - -@item -executing the special @samp{yyterminate()} action; - -@item -or, switching to a new buffer using -@samp{yy_switch_to_buffer()} as shown in the example -above. -@end itemize - -<> rules may not be used with other patterns; they -may only be qualified with a list of start conditions. If -an unqualified <> rule is given, it applies to @emph{all} -start conditions which do not already have <> -actions. To specify an <> rule for only the initial -start condition, use - -@example -<> -@end example - -These rules are useful for catching things like unclosed -comments. An example: - -@example -%x quote -%% - -@dots{}other rules for dealing with quotes@dots{} - -<> @{ - error( "unterminated quote" ); - yyterminate(); - @} -<> @{ - if ( *++filelist ) - yyin = fopen( *filelist, "r" ); - else - yyterminate(); - @} -@end example - -@node Miscellaneous, User variables, End-of-file rules, Top -@section Miscellaneous macros - -The macro @code{YY_USER_ACTION} can be defined to provide an -action which is always executed prior to the matched -rule's action. For example, it could be #define'd to call -a routine to convert yytext to lower-case. When -@code{YY_USER_ACTION} is invoked, the variable @code{yy_act} gives the -number of the matched rule (rules are numbered starting -with 1). Suppose you want to profile how often each of -your rules is matched. The following would do the trick: - -@example -#define YY_USER_ACTION ++ctr[yy_act] -@end example - -where @code{ctr} is an array to hold the counts for the different -rules. Note that the macro @code{YY_NUM_RULES} gives the total number -of rules (including the default rule, even if you use @samp{-s}, so -a correct declaration for @code{ctr} is: - -@example -int ctr[YY_NUM_RULES]; -@end example - -The macro @code{YY_USER_INIT} may be defined to provide an action -which is always executed before the first scan (and before -the scanner's internal initializations are done). For -example, it could be used to call a routine to read in a -data table or open a logging file. - -The macro @samp{yy_set_interactive(is_interactive)} can be used -to control whether the current buffer is considered -@emph{interactive}. An interactive buffer is processed more slowly, -but must be used when the scanner's input source is indeed -interactive to avoid problems due to waiting to fill -buffers (see the discussion of the @samp{-I} flag below). A -non-zero value in the macro invocation marks the buffer as -interactive, a zero value as non-interactive. Note that -use of this macro overrides @samp{%option always-interactive} or -@samp{%option never-interactive} (see Options below). -@samp{yy_set_interactive()} must be invoked prior to beginning to -scan the buffer that is (or is not) to be considered -interactive. - -The macro @samp{yy_set_bol(at_bol)} can be used to control -whether the current buffer's scanning context for the next -token match is done as though at the beginning of a line. -A non-zero macro argument makes rules anchored with - -The macro @samp{YY_AT_BOL()} returns true if the next token -scanned from the current buffer will have '^' rules -active, false otherwise. - -In the generated scanner, the actions are all gathered in -one large switch statement and separated using @code{YY_BREAK}, -which may be redefined. By default, it is simply a -"break", to separate each rule's action from the following -rule's. Redefining @code{YY_BREAK} allows, for example, C++ -users to #define YY_BREAK to do nothing (while being very -careful that every rule ends with a "break" or a -"return"!) to avoid suffering from unreachable statement -warnings where because a rule's action ends with "return", -the @code{YY_BREAK} is inaccessible. - -@node User variables, YACC interface, Miscellaneous, Top -@section Values available to the user - -This section summarizes the various values available to -the user in the rule actions. - -@itemize - -@item -@samp{char *yytext} holds the text of the current token. -It may be modified but not lengthened (you cannot -append characters to the end). - -If the special directive @samp{%array} appears in the -first section of the scanner description, then -@code{yytext} is instead declared @samp{char yytext[YYLMAX]}, -where @code{YYLMAX} is a macro definition that you can -redefine in the first section if you don't like the -default value (generally 8KB). Using @samp{%array} -results in somewhat slower scanners, but the value -of @code{yytext} becomes immune to calls to @samp{input()} and -@samp{unput()}, which potentially destroy its value when -@code{yytext} is a character pointer. The opposite of -@samp{%array} is @samp{%pointer}, which is the default. - -You cannot use @samp{%array} when generating C++ scanner -classes (the @samp{-+} flag). - -@item -@samp{int yyleng} holds the length of the current token. - -@item -@samp{FILE *yyin} is the file which by default @code{flex} reads -from. It may be redefined but doing so only makes -sense before scanning begins or after an EOF has -been encountered. Changing it in the midst of -scanning will have unexpected results since @code{flex} -buffers its input; use @samp{yyrestart()} instead. Once -scanning terminates because an end-of-file has been -seen, you can assign @code{yyin} at the new input file and -then call the scanner again to continue scanning. - -@item -@samp{void yyrestart( FILE *new_file )} may be called to -point @code{yyin} at the new input file. The switch-over -to the new file is immediate (any previously -buffered-up input is lost). Note that calling -@samp{yyrestart()} with @code{yyin} as an argument thus throws -away the current input buffer and continues -scanning the same input file. - -@item -@samp{FILE *yyout} is the file to which @samp{ECHO} actions are -done. It can be reassigned by the user. - -@item -@code{YY_CURRENT_BUFFER} returns a @code{YY_BUFFER_STATE} handle -to the current buffer. - -@item -@code{YY_START} returns an integer value corresponding to -the current start condition. You can subsequently -use this value with @code{BEGIN} to return to that start -condition. -@end itemize - -@node YACC interface, Options, User variables, Top -@section Interfacing with @code{yacc} - -One of the main uses of @code{flex} is as a companion to the @code{yacc} -parser-generator. @code{yacc} parsers expect to call a routine -named @samp{yylex()} to find the next input token. The routine -is supposed to return the type of the next token as well -as putting any associated value in the global @code{yylval}. To -use @code{flex} with @code{yacc}, one specifies the @samp{-d} option to @code{yacc} to -instruct it to generate the file @file{y.tab.h} containing -definitions of all the @samp{%tokens} appearing in the @code{yacc} input. -This file is then included in the @code{flex} scanner. For -example, if one of the tokens is "TOK_NUMBER", part of the -scanner might look like: - -@example -%@{ -#include "y.tab.h" -%@} - -%% - -[0-9]+ yylval = atoi( yytext ); return TOK_NUMBER; -@end example - -@node Options, Performance, YACC interface, Top -@section Options -@code{flex} has the following options: - -@table @samp -@item -b -Generate backing-up information to @file{lex.backup}. -This is a list of scanner states which require -backing up and the input characters on which they -do so. By adding rules one can remove backing-up -states. If @emph{all} backing-up states are eliminated -and @samp{-Cf} or @samp{-CF} is used, the generated scanner will -run faster (see the @samp{-p} flag). Only users who wish -to squeeze every last cycle out of their scanners -need worry about this option. (See the section on -Performance Considerations below.) - -@item -c -is a do-nothing, deprecated option included for -POSIX compliance. - -@item -d -makes the generated scanner run in @dfn{debug} mode. -Whenever a pattern is recognized and the global -@code{yy_flex_debug} is non-zero (which is the default), -the scanner will write to @code{stderr} a line of the -form: - -@example ---accepting rule at line 53 ("the matched text") -@end example - -The line number refers to the location of the rule -in the file defining the scanner (i.e., the file -that was fed to flex). Messages are also generated -when the scanner backs up, accepts the default -rule, reaches the end of its input buffer (or -encounters a NUL; at this point, the two look the -same as far as the scanner's concerned), or reaches -an end-of-file. - -@item -f -specifies @dfn{fast scanner}. No table compression is -done and stdio is bypassed. The result is large -but fast. This option is equivalent to @samp{-Cfr} (see -below). - -@item -h -generates a "help" summary of @code{flex's} options to -@code{stdout} and then exits. @samp{-?} and @samp{--help} are synonyms -for @samp{-h}. - -@item -i -instructs @code{flex} to generate a @emph{case-insensitive} -scanner. The case of letters given in the @code{flex} input -patterns will be ignored, and tokens in the input -will be matched regardless of case. The matched -text given in @code{yytext} will have the preserved case -(i.e., it will not be folded). - -@item -l -turns on maximum compatibility with the original -AT&T @code{lex} implementation. Note that this does not -mean @emph{full} compatibility. Use of this option costs -a considerable amount of performance, and it cannot -be used with the @samp{-+, -f, -F, -Cf}, or @samp{-CF} options. -For details on the compatibilities it provides, see -the section "Incompatibilities With Lex And POSIX" -below. This option also results in the name -@code{YY_FLEX_LEX_COMPAT} being #define'd in the generated -scanner. - -@item -n -is another do-nothing, deprecated option included -only for POSIX compliance. - -@item -p -generates a performance report to stderr. The -report consists of comments regarding features of -the @code{flex} input file which will cause a serious loss -of performance in the resulting scanner. If you -give the flag twice, you will also get comments -regarding features that lead to minor performance -losses. - -Note that the use of @code{REJECT}, @samp{%option yylineno} and -variable trailing context (see the Deficiencies / Bugs section below) -entails a substantial performance penalty; use of @samp{yymore()}, -the @samp{^} operator, and the @samp{-I} flag entail minor performance -penalties. - -@item -s -causes the @dfn{default rule} (that unmatched scanner -input is echoed to @code{stdout}) to be suppressed. If -the scanner encounters input that does not match -any of its rules, it aborts with an error. This -option is useful for finding holes in a scanner's -rule set. - -@item -t -instructs @code{flex} to write the scanner it generates to -standard output instead of @file{lex.yy.c}. - -@item -v -specifies that @code{flex} should write to @code{stderr} a -summary of statistics regarding the scanner it -generates. Most of the statistics are meaningless to -the casual @code{flex} user, but the first line identifies -the version of @code{flex} (same as reported by @samp{-V}), and -the next line the flags used when generating the -scanner, including those that are on by default. - -@item -w -suppresses warning messages. - -@item -B -instructs @code{flex} to generate a @emph{batch} scanner, the -opposite of @emph{interactive} scanners generated by @samp{-I} -(see below). In general, you use @samp{-B} when you are -@emph{certain} that your scanner will never be used -interactively, and you want to squeeze a @emph{little} more -performance out of it. If your goal is instead to -squeeze out a @emph{lot} more performance, you should be -using the @samp{-Cf} or @samp{-CF} options (discussed below), -which turn on @samp{-B} automatically anyway. - -@item -F -specifies that the @dfn{fast} scanner table -representation should be used (and stdio bypassed). This -representation is about as fast as the full table -representation @samp{(-f)}, and for some sets of patterns -will be considerably smaller (and for others, -larger). In general, if the pattern set contains -both "keywords" and a catch-all, "identifier" rule, -such as in the set: - -@example -"case" return TOK_CASE; -"switch" return TOK_SWITCH; -... -"default" return TOK_DEFAULT; -[a-z]+ return TOK_ID; -@end example - -@noindent -then you're better off using the full table -representation. If only the "identifier" rule is -present and you then use a hash table or some such to -detect the keywords, you're better off using @samp{-F}. - -This option is equivalent to @samp{-CFr} (see below). It -cannot be used with @samp{-+}. - -@item -I -instructs @code{flex} to generate an @emph{interactive} scanner. -An interactive scanner is one that only looks ahead -to decide what token has been matched if it -absolutely must. It turns out that always looking one -extra character ahead, even if the scanner has -already seen enough text to disambiguate the -current token, is a bit faster than only looking ahead -when necessary. But scanners that always look -ahead give dreadful interactive performance; for -example, when a user types a newline, it is not -recognized as a newline token until they enter -@emph{another} token, which often means typing in another -whole line. - -@code{Flex} scanners default to @emph{interactive} unless you use -the @samp{-Cf} or @samp{-CF} table-compression options (see -below). That's because if you're looking for -high-performance you should be using one of these -options, so if you didn't, @code{flex} assumes you'd -rather trade off a bit of run-time performance for -intuitive interactive behavior. Note also that you -@emph{cannot} use @samp{-I} in conjunction with @samp{-Cf} or @samp{-CF}. -Thus, this option is not really needed; it is on by -default for all those cases in which it is allowed. - -You can force a scanner to @emph{not} be interactive by -using @samp{-B} (see above). - -@item -L -instructs @code{flex} not to generate @samp{#line} directives. -Without this option, @code{flex} peppers the generated -scanner with #line directives so error messages in -the actions will be correctly located with respect -to either the original @code{flex} input file (if the -errors are due to code in the input file), or -@file{lex.yy.c} (if the errors are @code{flex's} fault -- you -should report these sorts of errors to the email -address given below). - -@item -T -makes @code{flex} run in @code{trace} mode. It will generate a -lot of messages to @code{stderr} concerning the form of -the input and the resultant non-deterministic and -deterministic finite automata. This option is -mostly for use in maintaining @code{flex}. - -@item -V -prints the version number to @code{stdout} and exits. -@samp{--version} is a synonym for @samp{-V}. - -@item -7 -instructs @code{flex} to generate a 7-bit scanner, i.e., -one which can only recognized 7-bit characters in -its input. The advantage of using @samp{-7} is that the -scanner's tables can be up to half the size of -those generated using the @samp{-8} option (see below). -The disadvantage is that such scanners often hang -or crash if their input contains an 8-bit -character. - -Note, however, that unless you generate your -scanner using the @samp{-Cf} or @samp{-CF} table compression options, -use of @samp{-7} will save only a small amount of table -space, and make your scanner considerably less -portable. @code{Flex's} default behavior is to generate -an 8-bit scanner unless you use the @samp{-Cf} or @samp{-CF}, in -which case @code{flex} defaults to generating 7-bit -scanners unless your site was always configured to -generate 8-bit scanners (as will often be the case -with non-USA sites). You can tell whether flex -generated a 7-bit or an 8-bit scanner by inspecting -the flag summary in the @samp{-v} output as described -above. - -Note that if you use @samp{-Cfe} or @samp{-CFe} (those table -compression options, but also using equivalence -classes as discussed see below), flex still -defaults to generating an 8-bit scanner, since -usually with these compression options full 8-bit -tables are not much more expensive than 7-bit -tables. - -@item -8 -instructs @code{flex} to generate an 8-bit scanner, i.e., -one which can recognize 8-bit characters. This -flag is only needed for scanners generated using -@samp{-Cf} or @samp{-CF}, as otherwise flex defaults to -generating an 8-bit scanner anyway. - -See the discussion of @samp{-7} above for flex's default -behavior and the tradeoffs between 7-bit and 8-bit -scanners. - -@item -+ -specifies that you want flex to generate a C++ -scanner class. See the section on Generating C++ -Scanners below for details. - -@item -C[aefFmr] -controls the degree of table compression and, more -generally, trade-offs between small scanners and -fast scanners. - -@samp{-Ca} ("align") instructs flex to trade off larger -tables in the generated scanner for faster -performance because the elements of the tables are better -aligned for memory access and computation. On some -RISC architectures, fetching and manipulating -long-words is more efficient than with smaller-sized -units such as shortwords. This option can double -the size of the tables used by your scanner. - -@samp{-Ce} directs @code{flex} to construct @dfn{equivalence classes}, -i.e., sets of characters which have identical -lexical properties (for example, if the only appearance -of digits in the @code{flex} input is in the character -class "[0-9]" then the digits '0', '1', @dots{}, '9' -will all be put in the same equivalence class). -Equivalence classes usually give dramatic -reductions in the final table/object file sizes -(typically a factor of 2-5) and are pretty cheap -performance-wise (one array look-up per character -scanned). - -@samp{-Cf} specifies that the @emph{full} scanner tables should -be generated - @code{flex} should not compress the tables -by taking advantages of similar transition -functions for different states. - -@samp{-CF} specifies that the alternate fast scanner -representation (described above under the @samp{-F} flag) -should be used. This option cannot be used with -@samp{-+}. - -@samp{-Cm} directs @code{flex} to construct @dfn{meta-equivalence -classes}, which are sets of equivalence classes (or -characters, if equivalence classes are not being -used) that are commonly used together. -Meta-equivalence classes are often a big win when using -compressed tables, but they have a moderate -performance impact (one or two "if" tests and one array -look-up per character scanned). - -@samp{-Cr} causes the generated scanner to @emph{bypass} use of -the standard I/O library (stdio) for input. -Instead of calling @samp{fread()} or @samp{getc()}, the scanner -will use the @samp{read()} system call, resulting in a -performance gain which varies from system to -system, but in general is probably negligible unless -you are also using @samp{-Cf} or @samp{-CF}. Using @samp{-Cr} can cause -strange behavior if, for example, you read from -@code{yyin} using stdio prior to calling the scanner -(because the scanner will miss whatever text your -previous reads left in the stdio input buffer). - -@samp{-Cr} has no effect if you define @code{YY_INPUT} (see The -Generated Scanner above). - -A lone @samp{-C} specifies that the scanner tables should -be compressed but neither equivalence classes nor -meta-equivalence classes should be used. - -The options @samp{-Cf} or @samp{-CF} and @samp{-Cm} do not make sense -together - there is no opportunity for -meta-equivalence classes if the table is not being -compressed. Otherwise the options may be freely -mixed, and are cumulative. - -The default setting is @samp{-Cem}, which specifies that -@code{flex} should generate equivalence classes and -meta-equivalence classes. This setting provides the -highest degree of table compression. You can trade -off faster-executing scanners at the cost of larger -tables with the following generally being true: - -@example -slowest & smallest - -Cem - -Cm - -Ce - -C - -C@{f,F@}e - -C@{f,F@} - -C@{f,F@}a -fastest & largest -@end example - -Note that scanners with the smallest tables are -usually generated and compiled the quickest, so -during development you will usually want to use the -default, maximal compression. - -@samp{-Cfe} is often a good compromise between speed and -size for production scanners. - -@item -ooutput -directs flex to write the scanner to the file @samp{out-} -@code{put} instead of @file{lex.yy.c}. If you combine @samp{-o} with -the @samp{-t} option, then the scanner is written to -@code{stdout} but its @samp{#line} directives (see the @samp{-L} option -above) refer to the file @code{output}. - -@item -Pprefix -changes the default @samp{yy} prefix used by @code{flex} for all -globally-visible variable and function names to -instead be @var{prefix}. For example, @samp{-Pfoo} changes the -name of @code{yytext} to @file{footext}. It also changes the -name of the default output file from @file{lex.yy.c} to -@file{lex.foo.c}. Here are all of the names affected: - -@example -yy_create_buffer -yy_delete_buffer -yy_flex_debug -yy_init_buffer -yy_flush_buffer -yy_load_buffer_state -yy_switch_to_buffer -yyin -yyleng -yylex -yylineno -yyout -yyrestart -yytext -yywrap -@end example - -(If you are using a C++ scanner, then only @code{yywrap} -and @code{yyFlexLexer} are affected.) Within your scanner -itself, you can still refer to the global variables -and functions using either version of their name; -but externally, they have the modified name. - -This option lets you easily link together multiple -@code{flex} programs into the same executable. Note, -though, that using this option also renames -@samp{yywrap()}, so you now @emph{must} either provide your own -(appropriately-named) version of the routine for -your scanner, or use @samp{%option noyywrap}, as linking -with @samp{-lfl} no longer provides one for you by -default. - -@item -Sskeleton_file -overrides the default skeleton file from which @code{flex} -constructs its scanners. You'll never need this -option unless you are doing @code{flex} maintenance or -development. -@end table - -@code{flex} also provides a mechanism for controlling options -within the scanner specification itself, rather than from -the flex command-line. This is done by including @samp{%option} -directives in the first section of the scanner -specification. You can specify multiple options with a single -@samp{%option} directive, and multiple directives in the first -section of your flex input file. Most options are given -simply as names, optionally preceded by the word "no" -(with no intervening whitespace) to negate their meaning. -A number are equivalent to flex flags or their negation: - -@example -7bit -7 option -8bit -8 option -align -Ca option -backup -b option -batch -B option -c++ -+ option - -caseful or -case-sensitive opposite of -i (default) - -case-insensitive or -caseless -i option - -debug -d option -default opposite of -s option -ecs -Ce option -fast -F option -full -f option -interactive -I option -lex-compat -l option -meta-ecs -Cm option -perf-report -p option -read -Cr option -stdout -t option -verbose -v option -warn opposite of -w option - (use "%option nowarn" for -w) - -array equivalent to "%array" -pointer equivalent to "%pointer" (default) -@end example - -Some @samp{%option's} provide features otherwise not available: - -@table @samp -@item always-interactive -instructs flex to generate a scanner which always -considers its input "interactive". Normally, on -each new input file the scanner calls @samp{isatty()} in -an attempt to determine whether the scanner's input -source is interactive and thus should be read a -character at a time. When this option is used, -however, then no such call is made. - -@item main -directs flex to provide a default @samp{main()} program -for the scanner, which simply calls @samp{yylex()}. This -option implies @code{noyywrap} (see below). - -@item never-interactive -instructs flex to generate a scanner which never -considers its input "interactive" (again, no call -made to @samp{isatty())}. This is the opposite of @samp{always-} -@emph{interactive}. - -@item stack -enables the use of start condition stacks (see -Start Conditions above). - -@item stdinit -if unset (i.e., @samp{%option nostdinit}) initializes @code{yyin} -and @code{yyout} to nil @code{FILE} pointers, instead of @code{stdin} -and @code{stdout}. - -@item yylineno -directs @code{flex} to generate a scanner that maintains the number -of the current line read from its input in the global variable -@code{yylineno}. This option is implied by @samp{%option lex-compat}. - -@item yywrap -if unset (i.e., @samp{%option noyywrap}), makes the -scanner not call @samp{yywrap()} upon an end-of-file, but -simply assume that there are no more files to scan -(until the user points @code{yyin} at a new file and calls -@samp{yylex()} again). -@end table - -@code{flex} scans your rule actions to determine whether you use -the @code{REJECT} or @samp{yymore()} features. The @code{reject} and @code{yymore} -options are available to override its decision as to -whether you use the options, either by setting them (e.g., -@samp{%option reject}) to indicate the feature is indeed used, or -unsetting them to indicate it actually is not used (e.g., -@samp{%option noyymore}). - -Three options take string-delimited values, offset with '=': - -@example -%option outfile="ABC" -@end example - -@noindent -is equivalent to @samp{-oABC}, and - -@example -%option prefix="XYZ" -@end example - -@noindent -is equivalent to @samp{-PXYZ}. - -Finally, - -@example -%option yyclass="foo" -@end example - -@noindent -only applies when generating a C++ scanner (@samp{-+} option). It -informs @code{flex} that you have derived @samp{foo} as a subclass of -@code{yyFlexLexer} so @code{flex} will place your actions in the member -function @samp{foo::yylex()} instead of @samp{yyFlexLexer::yylex()}. -It also generates a @samp{yyFlexLexer::yylex()} member function that -emits a run-time error (by invoking @samp{yyFlexLexer::LexerError()}) -if called. See Generating C++ Scanners, below, for additional -information. - -A number of options are available for lint purists who -want to suppress the appearance of unneeded routines in -the generated scanner. Each of the following, if unset, -results in the corresponding routine not appearing in the -generated scanner: - -@example -input, unput -yy_push_state, yy_pop_state, yy_top_state -yy_scan_buffer, yy_scan_bytes, yy_scan_string -@end example - -@noindent -(though @samp{yy_push_state()} and friends won't appear anyway -unless you use @samp{%option stack}). - -@node Performance, C++, Options, Top -@section Performance considerations - -The main design goal of @code{flex} is that it generate -high-performance scanners. It has been optimized for dealing -well with large sets of rules. Aside from the effects on -scanner speed of the table compression @samp{-C} options outlined -above, there are a number of options/actions which degrade -performance. These are, from most expensive to least: - -@example -REJECT -%option yylineno -arbitrary trailing context - -pattern sets that require backing up -%array -%option interactive -%option always-interactive - -'^' beginning-of-line operator -yymore() -@end example - -with the first three all being quite expensive and the -last two being quite cheap. Note also that @samp{unput()} is -implemented as a routine call that potentially does quite -a bit of work, while @samp{yyless()} is a quite-cheap macro; so -if just putting back some excess text you scanned, use -@samp{yyless()}. - -@code{REJECT} should be avoided at all costs when performance is -important. It is a particularly expensive option. - -Getting rid of backing up is messy and often may be an -enormous amount of work for a complicated scanner. In -principal, one begins by using the @samp{-b} flag to generate a -@file{lex.backup} file. For example, on the input - -@example -%% -foo return TOK_KEYWORD; -foobar return TOK_KEYWORD; -@end example - -@noindent -the file looks like: - -@example -State #6 is non-accepting - - associated rule line numbers: - 2 3 - out-transitions: [ o ] - jam-transitions: EOF [ \001-n p-\177 ] - -State #8 is non-accepting - - associated rule line numbers: - 3 - out-transitions: [ a ] - jam-transitions: EOF [ \001-` b-\177 ] - -State #9 is non-accepting - - associated rule line numbers: - 3 - out-transitions: [ r ] - jam-transitions: EOF [ \001-q s-\177 ] - -Compressed tables always back up. -@end example - -The first few lines tell us that there's a scanner state -in which it can make a transition on an 'o' but not on any -other character, and that in that state the currently -scanned text does not match any rule. The state occurs -when trying to match the rules found at lines 2 and 3 in -the input file. If the scanner is in that state and then -reads something other than an 'o', it will have to back up -to find a rule which is matched. With a bit of -head-scratching one can see that this must be the state it's in -when it has seen "fo". When this has happened, if -anything other than another 'o' is seen, the scanner will -have to back up to simply match the 'f' (by the default -rule). - -The comment regarding State #8 indicates there's a problem -when "foob" has been scanned. Indeed, on any character -other than an 'a', the scanner will have to back up to -accept "foo". Similarly, the comment for State #9 -concerns when "fooba" has been scanned and an 'r' does not -follow. - -The final comment reminds us that there's no point going -to all the trouble of removing backing up from the rules -unless we're using @samp{-Cf} or @samp{-CF}, since there's no -performance gain doing so with compressed scanners. - -The way to remove the backing up is to add "error" rules: - -@example -%% -foo return TOK_KEYWORD; -foobar return TOK_KEYWORD; - -fooba | -foob | -fo @{ - /* false alarm, not really a keyword */ - return TOK_ID; - @} -@end example - -Eliminating backing up among a list of keywords can also -be done using a "catch-all" rule: - -@example -%% -foo return TOK_KEYWORD; -foobar return TOK_KEYWORD; - -[a-z]+ return TOK_ID; -@end example - -This is usually the best solution when appropriate. - -Backing up messages tend to cascade. With a complicated -set of rules it's not uncommon to get hundreds of -messages. If one can decipher them, though, it often only -takes a dozen or so rules to eliminate the backing up -(though it's easy to make a mistake and have an error rule -accidentally match a valid token. A possible future @code{flex} -feature will be to automatically add rules to eliminate -backing up). - -It's important to keep in mind that you gain the benefits -of eliminating backing up only if you eliminate @emph{every} -instance of backing up. Leaving just one means you gain -nothing. - -@var{Variable} trailing context (where both the leading and -trailing parts do not have a fixed length) entails almost -the same performance loss as @code{REJECT} (i.e., substantial). -So when possible a rule like: - -@example -%% -mouse|rat/(cat|dog) run(); -@end example - -@noindent -is better written: - -@example -%% -mouse/cat|dog run(); -rat/cat|dog run(); -@end example - -@noindent -or as - -@example -%% -mouse|rat/cat run(); -mouse|rat/dog run(); -@end example - -Note that here the special '|' action does @emph{not} provide any -savings, and can even make things worse (see Deficiencies -/ Bugs below). - -Another area where the user can increase a scanner's -performance (and one that's easier to implement) arises from -the fact that the longer the tokens matched, the faster -the scanner will run. This is because with long tokens -the processing of most input characters takes place in the -(short) inner scanning loop, and does not often have to go -through the additional work of setting up the scanning -environment (e.g., @code{yytext}) for the action. Recall the -scanner for C comments: - -@example -%x comment -%% - int line_num = 1; - -"/*" BEGIN(comment); - -[^*\n]* -"*"+[^*/\n]* -\n ++line_num; -"*"+"/" BEGIN(INITIAL); -@end example - -This could be sped up by writing it as: - -@example -%x comment -%% - int line_num = 1; - -"/*" BEGIN(comment); - -[^*\n]* -[^*\n]*\n ++line_num; -"*"+[^*/\n]* -"*"+[^*/\n]*\n ++line_num; -"*"+"/" BEGIN(INITIAL); -@end example - -Now instead of each newline requiring the processing of -another action, recognizing the newlines is "distributed" -over the other rules to keep the matched text as long as -possible. Note that @emph{adding} rules does @emph{not} slow down the -scanner! The speed of the scanner is independent of the -number of rules or (modulo the considerations given at the -beginning of this section) how complicated the rules are -with regard to operators such as '*' and '|'. - -A final example in speeding up a scanner: suppose you want -to scan through a file containing identifiers and -keywords, one per line and with no other extraneous -characters, and recognize all the keywords. A natural first -approach is: - -@example -%% -asm | -auto | -break | -@dots{} etc @dots{} -volatile | -while /* it's a keyword */ - -.|\n /* it's not a keyword */ -@end example - -To eliminate the back-tracking, introduce a catch-all -rule: - -@example -%% -asm | -auto | -break | -... etc ... -volatile | -while /* it's a keyword */ - -[a-z]+ | -.|\n /* it's not a keyword */ -@end example - -Now, if it's guaranteed that there's exactly one word per -line, then we can reduce the total number of matches by a -half by merging in the recognition of newlines with that -of the other tokens: - -@example -%% -asm\n | -auto\n | -break\n | -@dots{} etc @dots{} -volatile\n | -while\n /* it's a keyword */ - -[a-z]+\n | -.|\n /* it's not a keyword */ -@end example - -One has to be careful here, as we have now reintroduced -backing up into the scanner. In particular, while @emph{we} know -that there will never be any characters in the input -stream other than letters or newlines, @code{flex} can't figure -this out, and it will plan for possibly needing to back up -when it has scanned a token like "auto" and then the next -character is something other than a newline or a letter. -Previously it would then just match the "auto" rule and be -done, but now it has no "auto" rule, only a "auto\n" rule. -To eliminate the possibility of backing up, we could -either duplicate all rules but without final newlines, or, -since we never expect to encounter such an input and -therefore don't how it's classified, we can introduce one -more catch-all rule, this one which doesn't include a -newline: - -@example -%% -asm\n | -auto\n | -break\n | -@dots{} etc @dots{} -volatile\n | -while\n /* it's a keyword */ - -[a-z]+\n | -[a-z]+ | -.|\n /* it's not a keyword */ -@end example - -Compiled with @samp{-Cf}, this is about as fast as one can get a -@code{flex} scanner to go for this particular problem. - -A final note: @code{flex} is slow when matching NUL's, -particularly when a token contains multiple NUL's. It's best to -write rules which match @emph{short} amounts of text if it's -anticipated that the text will often include NUL's. - -Another final note regarding performance: as mentioned -above in the section How the Input is Matched, dynamically -resizing @code{yytext} to accommodate huge tokens is a slow -process because it presently requires that the (huge) token -be rescanned from the beginning. Thus if performance is -vital, you should attempt to match "large" quantities of -text but not "huge" quantities, where the cutoff between -the two is at about 8K characters/token. - -@node C++, Incompatibilities, Performance, Top -@section Generating C++ scanners - -@code{flex} provides two different ways to generate scanners for -use with C++. The first way is to simply compile a -scanner generated by @code{flex} using a C++ compiler instead of a C -compiler. You should not encounter any compilations -errors (please report any you find to the email address -given in the Author section below). You can then use C++ -code in your rule actions instead of C code. Note that -the default input source for your scanner remains @code{yyin}, -and default echoing is still done to @code{yyout}. Both of these -remain @samp{FILE *} variables and not C++ @code{streams}. - -You can also use @code{flex} to generate a C++ scanner class, using -the @samp{-+} option, (or, equivalently, @samp{%option c++}), which -is automatically specified if the name of the flex executable ends -in a @samp{+}, such as @code{flex++}. When using this option, flex -defaults to generating the scanner to the file @file{lex.yy.cc} instead -of @file{lex.yy.c}. The generated scanner includes the header file -@file{FlexLexer.h}, which defines the interface to two C++ classes. - -The first class, @code{FlexLexer}, provides an abstract base -class defining the general scanner class interface. It -provides the following member functions: - -@table @samp -@item const char* YYText() -returns the text of the most recently matched -token, the equivalent of @code{yytext}. - -@item int YYLeng() -returns the length of the most recently matched -token, the equivalent of @code{yyleng}. - -@item int lineno() const -returns the current input line number (see @samp{%option yylineno}), -or 1 if @samp{%option yylineno} was not used. - -@item void set_debug( int flag ) -sets the debugging flag for the scanner, equivalent to assigning to -@code{yy_flex_debug} (see the Options section above). Note that you -must build the scanner using @samp{%option debug} to include debugging -information in it. - -@item int debug() const -returns the current setting of the debugging flag. -@end table - -Also provided are member functions equivalent to -@samp{yy_switch_to_buffer(), yy_create_buffer()} (though the -first argument is an @samp{istream*} object pointer and not a -@samp{FILE*}, @samp{yy_flush_buffer()}, @samp{yy_delete_buffer()}, -and @samp{yyrestart()} (again, the first argument is a @samp{istream*} -object pointer). - -The second class defined in @file{FlexLexer.h} is @code{yyFlexLexer}, -which is derived from @code{FlexLexer}. It defines the following -additional member functions: - -@table @samp -@item yyFlexLexer( istream* arg_yyin = 0, ostream* arg_yyout = 0 ) -constructs a @code{yyFlexLexer} object using the given -streams for input and output. If not specified, -the streams default to @code{cin} and @code{cout}, respectively. - -@item virtual int yylex() -performs the same role is @samp{yylex()} does for ordinary -flex scanners: it scans the input stream, consuming -tokens, until a rule's action returns a value. If you derive a subclass -@var{S} -from @code{yyFlexLexer} -and want to access the member functions and variables of -@var{S} -inside @samp{yylex()}, -then you need to use @samp{%option yyclass="@var{S}"} -to inform @code{flex} -that you will be using that subclass instead of @code{yyFlexLexer}. -In this case, rather than generating @samp{yyFlexLexer::yylex()}, -@code{flex} generates @samp{@var{S}::yylex()} -(and also generates a dummy @samp{yyFlexLexer::yylex()} -that calls @samp{yyFlexLexer::LexerError()} -if called). - -@item virtual void switch_streams(istream* new_in = 0, ostream* new_out = 0) -reassigns @code{yyin} to @code{new_in} -(if non-nil) -and @code{yyout} to @code{new_out} -(ditto), deleting the previous input buffer if @code{yyin} -is reassigned. - -@item int yylex( istream* new_in = 0, ostream* new_out = 0 ) -first switches the input streams via @samp{switch_streams( new_in, new_out )} -and then returns the value of @samp{yylex()}. -@end table - -In addition, @code{yyFlexLexer} defines the following protected -virtual functions which you can redefine in derived -classes to tailor the scanner: - -@table @samp -@item virtual int LexerInput( char* buf, int max_size ) -reads up to @samp{max_size} characters into @var{buf} and -returns the number of characters read. To indicate -end-of-input, return 0 characters. Note that -"interactive" scanners (see the @samp{-B} and @samp{-I} flags) -define the macro @code{YY_INTERACTIVE}. If you redefine -@code{LexerInput()} and need to take different actions -depending on whether or not the scanner might be -scanning an interactive input source, you can test -for the presence of this name via @samp{#ifdef}. - -@item virtual void LexerOutput( const char* buf, int size ) -writes out @var{size} characters from the buffer @var{buf}, -which, while NUL-terminated, may also contain -"internal" NUL's if the scanner's rules can match -text with NUL's in them. - -@item virtual void LexerError( const char* msg ) -reports a fatal error message. The default version -of this function writes the message to the stream -@code{cerr} and exits. -@end table - -Note that a @code{yyFlexLexer} object contains its @emph{entire} -scanning state. Thus you can use such objects to create -reentrant scanners. You can instantiate multiple instances of -the same @code{yyFlexLexer} class, and you can also combine -multiple C++ scanner classes together in the same program -using the @samp{-P} option discussed above. -Finally, note that the @samp{%array} feature is not available to -C++ scanner classes; you must use @samp{%pointer} (the default). - -Here is an example of a simple C++ scanner: - -@example - // An example of using the flex C++ scanner class. - -%@{ -int mylineno = 0; -%@} - -string \"[^\n"]+\" - -ws [ \t]+ - -alpha [A-Za-z] -dig [0-9] -name (@{alpha@}|@{dig@}|\$)(@{alpha@}|@{dig@}|[_.\-/$])* -num1 [-+]?@{dig@}+\.?([eE][-+]?@{dig@}+)? -num2 [-+]?@{dig@}*\.@{dig@}+([eE][-+]?@{dig@}+)? -number @{num1@}|@{num2@} - -%% - -@{ws@} /* skip blanks and tabs */ - -"/*" @{ - int c; - - while((c = yyinput()) != 0) - @{ - if(c == '\n') - ++mylineno; - - else if(c == '*') - @{ - if((c = yyinput()) == '/') - break; - else - unput(c); - @} - @} - @} - -@{number@} cout << "number " << YYText() << '\n'; - -\n mylineno++; - -@{name@} cout << "name " << YYText() << '\n'; - -@{string@} cout << "string " << YYText() << '\n'; - -%% - -Version 2.5 December 1994 44 - -int main( int /* argc */, char** /* argv */ ) - @{ - FlexLexer* lexer = new yyFlexLexer; - while(lexer->yylex() != 0) - ; - return 0; - @} -@end example - -If you want to create multiple (different) lexer classes, -you use the @samp{-P} flag (or the @samp{prefix=} option) to rename each -@code{yyFlexLexer} to some other @code{xxFlexLexer}. You then can -include @samp{} in your other sources once per lexer -class, first renaming @code{yyFlexLexer} as follows: - -@example -#undef yyFlexLexer -#define yyFlexLexer xxFlexLexer -#include - -#undef yyFlexLexer -#define yyFlexLexer zzFlexLexer -#include -@end example - -if, for example, you used @samp{%option prefix="xx"} for one of -your scanners and @samp{%option prefix="zz"} for the other. - -IMPORTANT: the present form of the scanning class is -@emph{experimental} and may change considerably between major -releases. - -@node Incompatibilities, Diagnostics, C++, Top -@section Incompatibilities with @code{lex} and POSIX - -@code{flex} is a rewrite of the AT&T Unix @code{lex} tool (the two -implementations do not share any code, though), with some -extensions and incompatibilities, both of which are of -concern to those who wish to write scanners acceptable to -either implementation. Flex is fully compliant with the -POSIX @code{lex} specification, except that when using @samp{%pointer} -(the default), a call to @samp{unput()} destroys the contents of -@code{yytext}, which is counter to the POSIX specification. - -In this section we discuss all of the known areas of -incompatibility between flex, AT&T lex, and the POSIX -specification. - -@code{flex's} @samp{-l} option turns on maximum compatibility with the -original AT&T @code{lex} implementation, at the cost of a major -loss in the generated scanner's performance. We note -below which incompatibilities can be overcome using the @samp{-l} -option. - -@code{flex} is fully compatible with @code{lex} with the following -exceptions: - -@itemize - -@item -The undocumented @code{lex} scanner internal variable @code{yylineno} -is not supported unless @samp{-l} or @samp{%option yylineno} is used. -@code{yylineno} should be maintained on a per-buffer basis, rather -than a per-scanner (single global variable) basis. @code{yylineno} is -not part of the POSIX specification. - -@item -The @samp{input()} routine is not redefinable, though it -may be called to read characters following whatever -has been matched by a rule. If @samp{input()} encounters -an end-of-file the normal @samp{yywrap()} processing is -done. A ``real'' end-of-file is returned by -@samp{input()} as @code{EOF}. - -Input is instead controlled by defining the -@code{YY_INPUT} macro. - -The @code{flex} restriction that @samp{input()} cannot be -redefined is in accordance with the POSIX -specification, which simply does not specify any way of -controlling the scanner's input other than by making -an initial assignment to @code{yyin}. - -@item -The @samp{unput()} routine is not redefinable. This -restriction is in accordance with POSIX. - -@item -@code{flex} scanners are not as reentrant as @code{lex} scanners. -In particular, if you have an interactive scanner -and an interrupt handler which long-jumps out of -the scanner, and the scanner is subsequently called -again, you may get the following message: - -@example -fatal flex scanner internal error--end of buffer missed -@end example - -To reenter the scanner, first use - -@example -yyrestart( yyin ); -@end example - -Note that this call will throw away any buffered -input; usually this isn't a problem with an -interactive scanner. - -Also note that flex C++ scanner classes @emph{are} -reentrant, so if using C++ is an option for you, you -should use them instead. See "Generating C++ -Scanners" above for details. - -@item -@samp{output()} is not supported. Output from the @samp{ECHO} -macro is done to the file-pointer @code{yyout} (default -@code{stdout}). - -@samp{output()} is not part of the POSIX specification. - -@item -@code{lex} does not support exclusive start conditions -(%x), though they are in the POSIX specification. - -@item -When definitions are expanded, @code{flex} encloses them -in parentheses. With lex, the following: - -@example -NAME [A-Z][A-Z0-9]* -%% -foo@{NAME@}? printf( "Found it\n" ); -%% -@end example - -will not match the string "foo" because when the -macro is expanded the rule is equivalent to -"foo[A-Z][A-Z0-9]*?" and the precedence is such that the -'?' is associated with "[A-Z0-9]*". With @code{flex}, the -rule will be expanded to "foo([A-Z][A-Z0-9]*)?" and -so the string "foo" will match. - -Note that if the definition begins with @samp{^} or ends -with @samp{$} then it is @emph{not} expanded with parentheses, to -allow these operators to appear in definitions -without losing their special meanings. But the -@samp{, /}, and @samp{<>} operators cannot be used in a -@code{flex} definition. - -Using @samp{-l} results in the @code{lex} behavior of no -parentheses around the definition. - -The POSIX specification is that the definition be enclosed in -parentheses. - -@item -Some implementations of @code{lex} allow a rule's action to begin on -a separate line, if the rule's pattern has trailing whitespace: - -@example -%% -foo|bar - @{ foobar_action(); @} -@end example - -@code{flex} does not support this feature. - -@item -The @code{lex} @samp{%r} (generate a Ratfor scanner) option is -not supported. It is not part of the POSIX -specification. - -@item -After a call to @samp{unput()}, @code{yytext} is undefined until -the next token is matched, unless the scanner was -built using @samp{%array}. This is not the case with @code{lex} -or the POSIX specification. The @samp{-l} option does -away with this incompatibility. - -@item -The precedence of the @samp{@{@}} (numeric range) operator -is different. @code{lex} interprets "abc@{1,3@}" as "match -one, two, or three occurrences of 'abc'", whereas -@code{flex} interprets it as "match 'ab' followed by one, -two, or three occurrences of 'c'". The latter is -in agreement with the POSIX specification. - -@item -The precedence of the @samp{^} operator is different. @code{lex} -interprets "^foo|bar" as "match either 'foo' at the -beginning of a line, or 'bar' anywhere", whereas -@code{flex} interprets it as "match either 'foo' or 'bar' -if they come at the beginning of a line". The -latter is in agreement with the POSIX specification. - -@item -The special table-size declarations such as @samp{%a} -supported by @code{lex} are not required by @code{flex} scanners; -@code{flex} ignores them. - -@item -The name FLEX_SCANNER is #define'd so scanners may -be written for use with either @code{flex} or @code{lex}. -Scanners also include @code{YY_FLEX_MAJOR_VERSION} and -@code{YY_FLEX_MINOR_VERSION} indicating which version of -@code{flex} generated the scanner (for example, for the -2.5 release, these defines would be 2 and 5 -respectively). -@end itemize - -The following @code{flex} features are not included in @code{lex} or the -POSIX specification: - -@example -C++ scanners -%option -start condition scopes -start condition stacks -interactive/non-interactive scanners -yy_scan_string() and friends -yyterminate() -yy_set_interactive() -yy_set_bol() -YY_AT_BOL() -<> -<*> -YY_DECL -YY_START -YY_USER_ACTION -YY_USER_INIT -#line directives -%@{@}'s around actions -multiple actions on a line -@end example - -@noindent -plus almost all of the flex flags. The last feature in -the list refers to the fact that with @code{flex} you can put -multiple actions on the same line, separated with -semicolons, while with @code{lex}, the following - -@example -foo handle_foo(); ++num_foos_seen; -@end example - -@noindent -is (rather surprisingly) truncated to - -@example -foo handle_foo(); -@end example - -@code{flex} does not truncate the action. Actions that are not -enclosed in braces are simply terminated at the end of the -line. - -@node Diagnostics, Files, Incompatibilities, Top -@section Diagnostics - -@table @samp -@item warning, rule cannot be matched -indicates that the given -rule cannot be matched because it follows other rules that -will always match the same text as it. For example, in -the following "foo" cannot be matched because it comes -after an identifier "catch-all" rule: - -@example -[a-z]+ got_identifier(); -foo got_foo(); -@end example - -Using @code{REJECT} in a scanner suppresses this warning. - -@item warning, -s option given but default rule can be matched -means that it is possible (perhaps only in a particular -start condition) that the default rule (match any single -character) is the only one that will match a particular -input. Since @samp{-s} was given, presumably this is not -intended. - -@item reject_used_but_not_detected undefined -@itemx yymore_used_but_not_detected undefined -These errors can -occur at compile time. They indicate that the scanner -uses @code{REJECT} or @samp{yymore()} but that @code{flex} failed to notice the -fact, meaning that @code{flex} scanned the first two sections -looking for occurrences of these actions and failed to -find any, but somehow you snuck some in (via a #include -file, for example). Use @samp{%option reject} or @samp{%option yymore} -to indicate to flex that you really do use these features. - -@item flex scanner jammed -a scanner compiled with @samp{-s} has -encountered an input string which wasn't matched by any of -its rules. This error can also occur due to internal -problems. - -@item token too large, exceeds YYLMAX -your scanner uses @samp{%array} -and one of its rules matched a string longer than the @samp{YYL-} -@code{MAX} constant (8K bytes by default). You can increase the -value by #define'ing @code{YYLMAX} in the definitions section of -your @code{flex} input. - -@item scanner requires -8 flag to use the character '@var{x}' -Your -scanner specification includes recognizing the 8-bit -character @var{x} and you did not specify the -8 flag, and your -scanner defaulted to 7-bit because you used the @samp{-Cf} or @samp{-CF} -table compression options. See the discussion of the @samp{-7} -flag for details. - -@item flex scanner push-back overflow -you used @samp{unput()} to push -back so much text that the scanner's buffer could not hold -both the pushed-back text and the current token in @code{yytext}. -Ideally the scanner should dynamically resize the buffer -in this case, but at present it does not. - -@item input buffer overflow, can't enlarge buffer because scanner uses REJECT -the scanner was working on matching an -extremely large token and needed to expand the input -buffer. This doesn't work with scanners that use @code{REJECT}. - -@item fatal flex scanner internal error--end of buffer missed -This can occur in an scanner which is reentered after a -long-jump has jumped out (or over) the scanner's -activation frame. Before reentering the scanner, use: - -@example -yyrestart( yyin ); -@end example - -@noindent -or, as noted above, switch to using the C++ scanner class. - -@item too many start conditions in <> construct! -you listed -more start conditions in a <> construct than exist (so you -must have listed at least one of them twice). -@end table - -@node Files, Deficiencies, Diagnostics, Top -@section Files - -@table @file -@item -lfl -library with which scanners must be linked. - -@item lex.yy.c -generated scanner (called @file{lexyy.c} on some systems). - -@item lex.yy.cc -generated C++ scanner class, when using @samp{-+}. - -@item -header file defining the C++ scanner base class, -@code{FlexLexer}, and its derived class, @code{yyFlexLexer}. - -@item flex.skl -skeleton scanner. This file is only used when -building flex, not when flex executes. - -@item lex.backup -backing-up information for @samp{-b} flag (called @file{lex.bck} -on some systems). -@end table - -@node Deficiencies, See also, Files, Top -@section Deficiencies / Bugs - -Some trailing context patterns cannot be properly matched -and generate warning messages ("dangerous trailing -context"). These are patterns where the ending of the first -part of the rule matches the beginning of the second part, -such as "zx*/xy*", where the 'x*' matches the 'x' at the -beginning of the trailing context. (Note that the POSIX -draft states that the text matched by such patterns is -undefined.) - -For some trailing context rules, parts which are actually -fixed-length are not recognized as such, leading to the -abovementioned performance loss. In particular, parts -using '|' or @{n@} (such as "foo@{3@}") are always considered -variable-length. - -Combining trailing context with the special '|' action can -result in @emph{fixed} trailing context being turned into the -more expensive @var{variable} trailing context. For example, in -the following: - -@example -%% -abc | -xyz/def -@end example - -Use of @samp{unput()} invalidates yytext and yyleng, unless the -@samp{%array} directive or the @samp{-l} option has been used. - -Pattern-matching of NUL's is substantially slower than -matching other characters. - -Dynamic resizing of the input buffer is slow, as it -entails rescanning all the text matched so far by the -current (generally huge) token. - -Due to both buffering of input and read-ahead, you cannot -intermix calls to routines, such as, for -example, @samp{getchar()}, with @code{flex} rules and expect it to work. -Call @samp{input()} instead. - -The total table entries listed by the @samp{-v} flag excludes the -number of table entries needed to determine what rule has -been matched. The number of entries is equal to the -number of DFA states if the scanner does not use @code{REJECT}, and -somewhat greater than the number of states if it does. - -@code{REJECT} cannot be used with the @samp{-f} or @samp{-F} options. - -The @code{flex} internal algorithms need documentation. - -@node See also, Author, Deficiencies, Top -@section See also - -@code{lex}(1), @code{yacc}(1), @code{sed}(1), @code{awk}(1). - -John Levine, Tony Mason, and Doug Brown: Lex & Yacc; -O'Reilly and Associates. Be sure to get the 2nd edition. - -M. E. Lesk and E. Schmidt, LEX - Lexical Analyzer Generator. - -Alfred Aho, Ravi Sethi and Jeffrey Ullman: Compilers: -Principles, Techniques and Tools; Addison-Wesley (1986). -Describes the pattern-matching techniques used by @code{flex} -(deterministic finite automata). - -@node Author, , See also, Top -@section Author - -Vern Paxson, with the help of many ideas and much inspiration from -Van Jacobson. Original version by Jef Poskanzer. The fast table -representation is a partial implementation of a design done by Van -Jacobson. The implementation was done by Kevin Gong and Vern Paxson. - -Thanks to the many @code{flex} beta-testers, feedbackers, and -contributors, especially Francois Pinard, Casey Leedom, Stan -Adermann, Terry Allen, David Barker-Plummer, John Basrai, Nelson -H.F. Beebe, @samp{benson@@odi.com}, Karl Berry, Peter A. Bigot, -Simon Blanchard, Keith Bostic, Frederic Brehm, Ian Brockbank, Kin -Cho, Nick Christopher, Brian Clapper, J.T. Conklin, Jason Coughlin, -Bill Cox, Nick Cropper, Dave Curtis, Scott David Daniels, Chris -G. Demetriou, Theo Deraadt, Mike Donahue, Chuck Doucette, Tom Epperly, -Leo Eskin, Chris Faylor, Chris Flatters, Jon Forrest, Joe Gayda, Kaveh -R. Ghazi, Eric Goldman, Christopher M. Gould, Ulrich Grepel, Peer -Griebel, Jan Hajic, Charles Hemphill, NORO Hideo, Jarkko Hietaniemi, -Scott Hofmann, Jeff Honig, Dana Hudes, Eric Hughes, John Interrante, -Ceriel Jacobs, Michal Jaegermann, Sakari Jalovaara, Jeffrey R. Jones, -Henry Juengst, Klaus Kaempf, Jonathan I. Kamens, Terrence O Kane, -Amir Katz, @samp{ken@@ken.hilco.com}, Kevin B. Kenny, Steve Kirsch, -Winfried Koenig, Marq Kole, Ronald Lamprecht, Greg Lee, Rohan Lenard, -Craig Leres, John Levine, Steve Liddle, Mike Long, Mohamed el Lozy, -Brian Madsen, Malte, Joe Marshall, Bengt Martensson, Chris Metcalf, -Luke Mewburn, Jim Meyering, R. Alexander Milowski, Erik Naggum, -G.T. Nicol, Landon Noll, James Nordby, Marc Nozell, Richard Ohnemus, -Karsten Pahnke, Sven Panne, Roland Pesch, Walter Pelissero, Gaumond -Pierre, Esmond Pitt, Jef Poskanzer, Joe Rahmeh, Jarmo Raiha, Frederic -Raimbault, Pat Rankin, Rick Richardson, Kevin Rodgers, Kai Uwe Rommel, -Jim Roskind, Alberto Santini, Andreas Scherer, Darrell Schiebel, Raf -Schietekat, Doug Schmidt, Philippe Schnoebelen, Andreas Schwab, Alex -Siegel, Eckehard Stolz, Jan-Erik Strvmquist, Mike Stump, Paul Stuart, -Dave Tallman, Ian Lance Taylor, Chris Thewalt, Richard M. Timoney, -Jodi Tsai, Paul Tuinenga, Gary Weik, Frank Whaley, Gerhard Wilhelms, -Kent Williams, Ken Yap, Ron Zellar, Nathan Zelle, David Zuhn, and -those whose names have slipped my marginal mail-archiving skills but -whose contributions are appreciated all the same. - -Thanks to Keith Bostic, Jon Forrest, Noah Friedman, John Gilmore, -Craig Leres, John Levine, Bob Mulcahy, G.T. Nicol, Francois Pinard, -Rich Salz, and Richard Stallman for help with various distribution -headaches. - -Thanks to Esmond Pitt and Earle Horton for 8-bit character support; -to Benson Margulies and Fred Burke for C++ support; to Kent Williams -and Tom Epperly for C++ class support; to Ove Ewerlid for support of -NUL's; and to Eric Hughes for support of multiple buffers. - -This work was primarily done when I was with the Real Time Systems -Group at the Lawrence Berkeley Laboratory in Berkeley, CA. Many thanks -to all there for the support I received. - -Send comments to @samp{vern@@ee.lbl.gov}. - -@c @node Index, , Top, Top -@c @unnumbered Index -@c -@c @printindex cp - -@contents -@bye - -@c Local variables: -@c texinfo-column-for-description: 32 -@c End: diff --git a/commands/flex-2.5.4/Makefile.in b/commands/flex-2.5.4/Makefile.in deleted file mode 100644 index 0f4a016bb..000000000 --- a/commands/flex-2.5.4/Makefile.in +++ /dev/null @@ -1,262 +0,0 @@ -# @(#) $Header$ (LBL) - -@SET_MAKE@ - -# Possible values for DEFS: -# -# By default, flex generates 8-bit scanners when using table compression, -# and 7-bit scanners when using uncompressed tables (-f or -F options). -# For flex to always generate 8-bit scanners, add "-DDEFAULT_CSIZE=256" -# to DEFS. -# -# For Vax/VMS, add "-DVMS" to DEFS. -# -# For MS-DOS, add "-DMS_DOS" to DEFS. See the directory MISC/MSDOS for -# additional info. - -CFLAGS = @CFLAGS@ -CPPFLAGS = @CPPFLAGS@ -DEFS = @DEFS@ -LDFLAGS = -stack 256k -LIBS = @LIBS@ - -# Installation targeting. Files will be installed under the tree -# rooted at prefix. flex will be installed in bindir, libfl.a in -# libdir, FlexLexer.h will be installed in includedir, and the manual -# pages will be installed in mandir with extension manext. -# -# Raw, unformatted troff source will be installed if INSTALLMAN=man, -# nroff preformatted versions will be installed if INSTALLMAN=cat. - -prefix = @prefix@ -exec_prefix = @exec_prefix@ -bindir = $(exec_prefix)/bin -libdir = $(exec_prefix)/lib -includedir = $(prefix)/include -manext = 1 -mandir = $(prefix)/man/man$(manext) - -# You can define these to be "lex" and "libl.a" if you want to replace -# lex at your site. -FLEX = flex -FLEXLIB = libfl.a - -INSTALLMAN = man - -SHELL = /bin/sh -srcdir = @srcdir@ -VPATH = @srcdir@ - -LN_S = @LN_S@ -YACC = @YACC@ -CC = @CC@ -AR = ar -RANLIB = true -INSTALL = @INSTALL@ -INSTALL_DATA = @INSTALL_DATA@ -INSTALL_PROGRAM = @INSTALL_PROGRAM@ - -# You normally do not need to modify anything below this point. -# ------------------------------------------------------------ - -CPPFLAGS = -I. -I$(srcdir) - -.c.o: - $(CC) -c $(CPPFLAGS) $(CFLAGS) $< - -HEADERS = flexdef.h version.h - -SOURCES = ccl.c dfa.c ecs.c gen.c main.c misc.c nfa.c parse.y \ - scan.l skel.c sym.c tblcmp.c yylex.c -OBJECTS = ccl.o dfa.o ecs.o gen.o main.o misc.o nfa.o parse.o \ - scan.o skel.o sym.o tblcmp.o yylex.o @ALLOCA@ - -LIBSRCS = libmain.c libyywrap.c -LIBOBJS = libmain.o libyywrap.o - -LINTSRCS = ccl.c dfa.c ecs.c gen.c main.c misc.c nfa.c parse.c \ - scan.c skel.c sym.c tblcmp.c yylex.c - -DISTFILES = README NEWS COPYING INSTALL FlexLexer.h \ - configure.in conf.in Makefile.in mkskel.sh flex.skl \ - $(HEADERS) $(SOURCES) $(LIBSRCS) MISC \ - flex.1 scan.c install.sh mkinstalldirs configure - -DIST_NAME = flex - -# which "flex" to use to generate scan.c from scan.l -FLEX_EXEC = ./$(FLEX) -FLEX_FLAGS = -t $(PERF_REPORT) -COMPRESSION = -PERF_REPORT = -p - -all: $(FLEX) - -$(FLEX): .bootstrap $(OBJECTS) $(FLEXLIB) - $(CC) $(CFLAGS) -o $(FLEX) $(LDFLAGS) $(OBJECTS) $(FLEXLIB) $(LIBS) - -.bootstrap: initscan.c - @rm -f scan.c - cp $(srcdir)/initscan.c scan.c - touch .bootstrap - -parse.c: parse.y - $(YACC) -d $(srcdir)/parse.y - @sed '/extern char.*malloc/d' parse.tmp - @mv parse.tmp parse.c - @mv y.tab.h parse.h - @rm -f y.tab.c - -parse.h: parse.c - -scan.c: scan.l - $(FLEX_EXEC) $(FLEX_FLAGS) $(COMPRESSION) $(srcdir)/scan.l >scan.c - @sed s,\"$(srcdir)/scan.l\",\"scan.l\", scan.tmp - @mv scan.tmp scan.c - -scan.o: scan.c parse.h flexdef.h config.h -yylex.o: yylex.c parse.h flexdef.h config.h - -skel.c: flex.skl mkskel.sh - $(SHELL) $(srcdir)/mkskel.sh $(srcdir)/flex.skl >skel.c - -main.o: main.c flexdef.h config.h version.h -ccl.o: ccl.c flexdef.h config.h -dfa.o: dfa.c flexdef.h config.h -ecs.o: ecs.c flexdef.h config.h -gen.o: gen.c flexdef.h config.h -misc.o: misc.c flexdef.h config.h -nfa.o: nfa.c flexdef.h config.h -parse.o: parse.c flexdef.h config.h -skel.o: skel.c flexdef.h config.h -sym.o: sym.c flexdef.h config.h -tblcmp.o: tblcmp.c flexdef.h config.h - -alloca.o: alloca.c - $(CC) $(CPPFLAGS) $(CFLAGS) -c -Dxmalloc=yy_flex_xmalloc alloca.c - -alloca.c: $(srcdir)/MISC/alloca.c - @rm -f alloca.c - cp $(srcdir)/MISC/alloca.c . - -test: check -check: $(FLEX) - $(FLEX_EXEC) $(FLEX_FLAGS) $(COMPRESSION) $(srcdir)/scan.l \ - | sed s,\"$(srcdir)/scan.l\",\"scan.l\", \ - | diff scan.c - - @echo "Check successful, using COMPRESSION=\"$(COMPRESSION)\"" - -bigcheck: - rm -f scan.c ; $(MAKE) COMPRESSION="-C" check - rm -f scan.c ; $(MAKE) COMPRESSION="-Ce" check - rm -f scan.c ; $(MAKE) COMPRESSION="-Cm" check - rm -f scan.c ; $(MAKE) COMPRESSION="-f" check - rm -f scan.c ; $(MAKE) COMPRESSION="-Cfea" check - rm -f scan.c ; $(MAKE) COMPRESSION="-CFer" check - rm -f scan.c ; $(MAKE) COMPRESSION="-l" PERF_REPORT="" check - rm -f scan.c ; $(MAKE) - @echo "All checks successful" - -$(FLEXLIB): $(LIBOBJS) - $(AR) cru $(FLEXLIB) $(LIBOBJS) - -$(RANLIB) $(FLEXLIB) - -$(FLEX).man: flex.1 - cd $(srcdir) && nroff -man flex.1 >$(FLEX).man - -install: $(FLEX) $(FLEXLIB) installdirs install.$(INSTALLMAN) - $(INSTALL_PROGRAM) $(FLEX) $(bindir)/$(FLEX) - @rm -f $(bindir)/$(FLEX)++ - cd $(bindir) && $(LN_S) $(FLEX) $(FLEX)++ - $(INSTALL_DATA) $(FLEXLIB) $(libdir)/$(FLEXLIB) - $(INSTALL_DATA) $(FLEXLIB) /usr/lib/i386/ - -cd $(libdir) && $(RANLIB) $(FLEXLIB) - $(INSTALL_DATA) $(srcdir)/FlexLexer.h $(includedir)/FlexLexer.h - -# Note, the following rules delete any vestigial flexdoc installed -# for a prior flex release. -install.man: flex.1 - rm -f $(mandir)/$(FLEX)doc.$(manext) - $(INSTALL_DATA) $(srcdir)/flex.1 $(mandir)/$(FLEX).$(manext) - -install.cat: $(FLEX).man - rm -f $(mandir)/$(FLEX)doc.$(manext) - $(INSTALL_DATA) $(srcdir)/$(FLEX).man $(mandir)/$(FLEX).$(manext) - -installdirs: - $(SHELL) $(srcdir)/mkinstalldirs \ - $(bindir) $(libdir) $(includedir) $(mandir) - -uninstall: - rm -f $(bindir)/$(FLEX) $(bindir)/$(FLEX)++ - rm -f $(libdir)/$(FLEXLIB) - rm -f $(includedir)/FlexLexer.h - rm -f $(mandir)/$(FLEX).$(manext) $(mandir)/$(FLEX)doc.$(manext) - -tags: $(SOURCES) - ctags $(SOURCES) - -TAGS: $(SOURCES) - etags $(SOURCES) - -lint: $(LINTSRCS) - lint -Dconst= $(LINTSRCS) > flex.lint - -gcc-lint: $(LINTSRCS) - gcc -Dlint -Wall $(LINTSRCS) >flex.gcc-lint 2>&1 - -mostlyclean: - rm -f a.out *.bak core errs scan.tmp - -clean: mostlyclean - rm -f flex parse.c parse.h *.o alloca.c *.lint lex.yy.c lex.yy.cc \ - $(FLEXLIB) config.log config.cache - -distclean: clean - rm -f .bootstrap $(FLEX) scan.c tags TAGS Makefile config.status \ - config.h stamp-h config.log config.cache - -maintainer-clean: distclean - @echo "This command is intended for maintainers to use;" - @echo "it deletes files that may require special tools to rebuild." - rm -f $(FLEX).man skel.c flex*.tar.gz flex*.tar.Z - -dist: $(FLEX) $(DISTFILES) parse.c parse.h $(srcdir)/$(FLEX).man - $(MAKE) DIST_NAME=flex-`sed $(DIST_NAME)/MISC/flex.man - tar chf $(DIST_NAME).tar $(DIST_NAME) - compress <$(DIST_NAME).tar >$(DIST_NAME).tar.Z - gzip <$(DIST_NAME).tar >$(DIST_NAME).tar.gz - @rm $(DIST_NAME).tar - -# For an explanation of the following Makefile rules, see node -# `Automatic Remaking' in GNU Autoconf documentation. -Makefile: $(srcdir)/Makefile.in config.status - CONFIG_FILES=$@ CONFIG_HEADERS= ./config.status -config.status: configure - ./config.status --recheck -configure: configure.in - cd $(srcdir) && autoconf -#config.h: stamp-h -stamp-h: conf.in config.status - CONFIG_FILES= CONFIG_HEADERS=config.h:conf.in ./config.status - echo timestamp >stamp-h -# conf.in: stamp-h.in -# stamp-h.in: configure.in acconfig.h -# cd $(srcdir) && autoheader -# config.h.in conf.in -# cho timestamp > $(srcdir)/stamp-h.in - -# Tell versions [3.59,3.63) of GNU make not to export all variables. -# Otherwise a system limit (for SysV at least) may be exceeded. -.NOEXPORT: diff --git a/commands/flex-2.5.4/NEWS b/commands/flex-2.5.4/NEWS deleted file mode 100644 index 3e23e7d9f..000000000 --- a/commands/flex-2.5.4/NEWS +++ /dev/null @@ -1,1233 +0,0 @@ -Changes between release 2.5.4 (11Sep96) and release 2.5.3: - - - Fixed a bug introduced in 2.5.3 that blew it when a call - to input() occurred at the end of an input file. - - - Fixed scanner skeleton so the example in the man page of - scanning strings using exclusive start conditions works. - - - Minor Makefile tweaks. - - -Changes between release 2.5.3 (29May96) and release 2.5.2: - - - Some serious bugs in yymore() have been fixed. In particular, - when using AT&T-lex-compatibility or %array, you can intermix - calls to input(), unput(), and yymore(). (This still doesn't - work for %pointer, and isn't likely to in the future.) - - - A bug in handling NUL's in the input stream of scanners using - REJECT has been fixed. - - - The default main() in libfl.a now repeatedly calls yylex() until - it returns 0, rather than just calling it once. - - - Minor tweak for Windows NT Makefile, MISC/NT/Makefile. - - -Changes between release 2.5.2 (25Apr95) and release 2.5.1: - - - The --prefix configuration option now works. - - - A bug that completely broke the "-Cf" table compression - option has been fixed. - - - A major headache involving "const" declarators and Solaris - systems has been fixed. - - - An octal escape sequence in a flex regular expression must - now contain only the digits 0-7. - - - You can now use "--" on the flex command line to mark the - end of flex options. - - - You can now specify the filename '-' as a synonym for stdin. - - - By default, the scanners generated by flex no longer - statically initialize yyin and yyout to stdin and stdout. - This change is necessary because in some ANSI environments, - stdin and stdout are not compile-time constant. You can - force the initialization using "%option stdinit" in the first - section of your flex input. - - - "%option nounput" now correctly omits the unput() routine - from the output. - - - "make clean" now removes config.log, config.cache, and the - flex binary. The fact that it removes the flex binary means - you should take care if making changes to scan.l, to make - sure you don't wind up in a bootstrap problem. - - - In general, the Makefile has been reworked somewhat (thanks - to Francois Pinard) for added flexibility - more changes will - follow in subsequent releases. - - - The .texi and .info files in MISC/texinfo/ have been updated, - thanks also to Francois Pinard. - - - The FlexLexer::yylex(istream* new_in, ostream* new_out) method - now does not have a default for the first argument, to disambiguate - it from FlexLexer::yylex(). - - - A bug in destructing a FlexLexer object before doing any scanning - with it has been fixed. - - - A problem with including FlexLexer.h multiple times has been fixed. - - - The alloca() chud necessary to accommodate bison has grown - even uglier, but hopefully more correct. - - - A portability tweak has been added to accommodate compilers that - use char* generic pointers. - - - EBCDIC contact information in the file MISC/EBCDIC has been updated. - - - An OS/2 Makefile and config.h for flex 2.5 is now available in - MISC/OS2/, contributed by Kai Uwe Rommel. - - - The descrip.mms file for building flex under VMS has been updated, - thanks to Pat Rankin. - - - The notes on building flex for the Amiga have been updated for - flex 2.5, contributed by Andreas Scherer. - - -Changes between release 2.5.1 (28Mar95) and release 2.4.7: - - - A new concept of "start condition" scope has been introduced. - A start condition scope is begun with: - - { - - where SCs is a list of one or more start conditions. Inside - the start condition scope, every rule automatically has the - prefix applied to it, until a '}' which matches the - initial '{'. So, for example: - - { - "\\n" return '\n'; - "\\r" return '\r'; - "\\f" return '\f'; - "\\0" return '\0'; - } - - is equivalent to: - - "\\n" return '\n'; - "\\r" return '\r'; - "\\f" return '\f'; - "\\0" return '\0'; - - As indicated in this example, rules inside start condition scopes - (and any rule, actually, other than the first) can be indented, - to better show the extent of the scope. - - Start condition scopes may be nested. - - - The new %option directive can be used in the first section of - a flex scanner to control scanner-generation options. Most - options are given simply as names, optionally preceded by the - word "no" (with no intervening whitespace) to negate their - meaning. Some are equivalent to flex flags, so putting them - in your scanner source is equivalent to always specifying - the flag (%option's take precedence over flags): - - 7bit -7 option - 8bit -8 option - align -Ca option - backup -b option - batch -B option - c++ -+ option - caseful opposite of -i option (caseful is the default); - case-sensitive same as above - caseless -i option; - case-insensitive same as above - debug -d option - default opposite of -s option - ecs -Ce option - fast -F option - full -f option - interactive -I option - lex-compat -l option - meta-ecs -Cm option - perf-report -p option - read -Cr option - stdout -t option - verbose -v option - warn opposite of -w option (so use "%option nowarn" for -w) - - array equivalent to "%array" - pointer equivalent to "%pointer" (default) - - Some provide new features: - - always-interactive generate a scanner which always - considers its input "interactive" (no call to isatty() - will be made when the scanner runs) - main supply a main program for the scanner, which - simply calls yylex(). Implies %option noyywrap. - never-interactive generate a scanner which never - considers its input "interactive" (no call to isatty() - will be made when the scanner runs) - stack if set, enable start condition stacks (see below) - stdinit if unset ("%option nostdinit"), initialize yyin - and yyout statically to nil FILE* pointers, instead - of stdin and stdout - yylineno if set, keep track of the current line - number in global yylineno (this option is expensive - in terms of performance). The line number is available - to C++ scanning objects via the new member function - lineno(). - yywrap if unset ("%option noyywrap"), scanner does not - call yywrap() upon EOF but simply assumes there - are no more files to scan - - Flex scans your rule actions to determine whether you use the - REJECT or yymore features (this is not new). Two %options can be - used to override its decision, either by setting them to indicate - the feature is indeed used, or unsetting them to indicate it - actually is not used: - - reject - yymore - - Three %option's take string-delimited values, offset with '=': - - outfile="" equivalent to -o - prefix="" equivalent to -P - yyclass="" set the name of the C++ scanning class - (see below) - - A number of %option's are available for lint purists who - want to suppress the appearance of unneeded routines in - the generated scanner. Each of the following, if unset, - results in the corresponding routine not appearing in the - generated scanner: - - input, unput - yy_push_state, yy_pop_state, yy_top_state - yy_scan_buffer, yy_scan_bytes, yy_scan_string - - You can specify multiple options with a single %option directive, - and multiple directives in the first section of your flex input file. - - - The new function: - - YY_BUFFER_STATE yy_scan_string( const char *str ) - - returns a YY_BUFFER_STATE (which also becomes the current input - buffer) for scanning the given string, which occurs starting - with the next call to yylex(). The string must be NUL-terminated. - A related function: - - YY_BUFFER_STATE yy_scan_bytes( const char *bytes, int len ) - - creates a buffer for scanning "len" bytes (including possibly NUL's) - starting at location "bytes". - - Note that both of these functions create and scan a *copy* of - the string/bytes. (This may be desirable, since yylex() modifies - the contents of the buffer it is scanning.) You can avoid the - copy by using: - - YY_BUFFER_STATE yy_scan_buffer( char *base, yy_size_t size ) - - which scans in place the buffer starting at "base", consisting - of "size" bytes, the last two bytes of which *must* be - YY_END_OF_BUFFER_CHAR (these bytes are not scanned; thus, scanning - consists of base[0] through base[size-2], inclusive). If you - fail to set up "base" in this manner, yy_scan_buffer returns a - nil pointer instead of creating a new input buffer. - - The type yy_size_t is an integral type to which you can cast - an integer expression reflecting the size of the buffer. - - - Three new routines are available for manipulating stacks of - start conditions: - - void yy_push_state( int new_state ) - - pushes the current start condition onto the top of the stack - and BEGIN's "new_state" (recall that start condition names are - also integers). - - void yy_pop_state() - - pops the top of the stack and BEGIN's to it, and - - int yy_top_state() - - returns the top of the stack without altering the stack's - contents. - - The start condition stack grows dynamically and so has no built-in - size limitation. If memory is exhausted, program execution - is aborted. - - To use start condition stacks, your scanner must include - a "%option stack" directive. - - - flex now supports POSIX character class expressions. These - are expressions enclosed inside "[:" and ":]" delimiters (which - themselves must appear between the '[' and ']' of a character - class; other elements may occur inside the character class, too). - The expressions flex recognizes are: - - [:alnum:] [:alpha:] [:blank:] [:cntrl:] [:digit:] [:graph:] - [:lower:] [:print:] [:punct:] [:space:] [:upper:] [:xdigit:] - - These expressions all designate a set of characters equivalent to - the corresponding isXXX function (for example, [:alnum:] designates - those characters for which isalnum() returns true - i.e., any - alphabetic or numeric). Some systems don't provide isblank(), - so flex defines [:blank:] as a blank or a tab. - - For example, the following character classes are all equivalent: - - [[:alnum:]] - [[:alpha:][:digit:] - [[:alpha:]0-9] - [a-zA-Z0-9] - - If your scanner is case-insensitive (-i flag), then [:upper:] - and [:lower:] are equivalent to [:alpha:]. - - - The promised rewrite of the C++ FlexLexer class has not yet - been done. Support for FlexLexer is limited at the moment to - fixing show-stopper bugs, so, for example, the new functions - yy_scan_string() & friends are not available to FlexLexer - objects. - - - The new macro - - yy_set_interactive(is_interactive) - - can be used to control whether the current buffer is considered - "interactive". An interactive buffer is processed more slowly, - but must be used when the scanner's input source is indeed - interactive to avoid problems due to waiting to fill buffers - (see the discussion of the -I flag in flex.1). A non-zero value - in the macro invocation marks the buffer as interactive, a zero - value as non-interactive. Note that use of this macro overrides - "%option always-interactive" or "%option never-interactive". - - yy_set_interactive() must be invoked prior to beginning to - scan the buffer. - - - The new macro - - yy_set_bol(at_bol) - - can be used to control whether the current buffer's scanning - context for the next token match is done as though at the - beginning of a line (non-zero macro argument; makes '^' anchored - rules active) or not at the beginning of a line (zero argument, - '^' rules inactive). - - - Related to this change, the mechanism for determining when a scan is - starting at the beginning of a line has changed. It used to be - that '^' was active iff the character prior to that at which the - scan started was a newline. The mechanism now is that '^' is - active iff the last token ended in a newline (or the last call to - input() returned a newline). For most users, the difference in - mechanisms is negligible. Where it will make a difference, - however, is if unput() or yyless() is used to alter the input - stream. When in doubt, use yy_set_bol(). - - - The new beginning-of-line mechanism involved changing some fairly - twisted code, so it may have introduced bugs - beware ... - - - The macro YY_AT_BOL() returns true if the next token scanned from - the current buffer will have '^' rules active, false otherwise. - - - The new function - - void yy_flush_buffer( struct yy_buffer_state* b ) - - flushes the contents of the current buffer (i.e., next time - the scanner attempts to match a token using b as the current - buffer, it will begin by invoking YY_INPUT to fill the buffer). - This routine is also available to C++ scanners (unlike some - of the other new routines). - - The related macro - - YY_FLUSH_BUFFER - - flushes the contents of the current buffer. - - - A new "-ooutput" option writes the generated scanner to "output". - If used with -t, the scanner is still written to stdout, but - its internal #line directives (see previous item) use "output". - - - Flex now generates #line directives relating the code it - produces to the output file; this means that error messages - in the flex-generated code should be correctly pinpointed. - - - When generating #line directives, filenames with embedded '\'s - have those characters escaped (i.e., turned into '\\'). This - feature helps with reporting filenames for some MS-DOS and OS/2 - systems. - - - The FlexLexer class includes two new public member functions: - - virtual void switch_streams( istream* new_in = 0, - ostream* new_out = 0 ) - - reassigns yyin to new_in (if non-nil) and yyout to new_out - (ditto), deleting the previous input buffer if yyin is - reassigned. It is used by: - - int yylex( istream* new_in = 0, ostream* new_out = 0 ) - - which first calls switch_streams() and then returns the value - of calling yylex(). - - - C++ scanners now have yy_flex_debug as a member variable of - FlexLexer rather than a global, and member functions for testing - and setting it. - - - When generating a C++ scanning class, you can now use - - %option yyclass="foo" - - to inform flex that you have derived "foo" as a subclass of - yyFlexLexer, so flex will place your actions in the member - function foo::yylex() instead of yyFlexLexer::yylex(). It also - generates a yyFlexLexer::yylex() member function that generates a - run-time error if called (by invoking yyFlexLexer::LexerError()). - This feature is necessary if your subclass "foo" introduces some - additional member functions or variables that you need to access - from yylex(). - - - Current texinfo files in MISC/texinfo, contributed by Francois - Pinard. - - - You can now change the name "flex" to something else (e.g., "lex") - by redefining $(FLEX) in the Makefile. - - - Two bugs (one serious) that could cause "bigcheck" to fail have - been fixed. - - - A number of portability/configuration changes have been made - for easier portability. - - - You can use "YYSTATE" in your scanner as an alias for YY_START - (for AT&T lex compatibility). - - - input() now maintains yylineno. - - - input() no longer trashes yytext. - - - interactive scanners now read characters in YY_INPUT up to a - newline, a large performance gain. - - - C++ scanner objects now work with the -P option. You include - once per scanner - see comments in - (or flex.1) for details. - - - C++ FlexLexer objects now use the "cerr" stream to report -d output - instead of stdio. - - - The -c flag now has its full glorious POSIX interpretation (do - nothing), rather than being interpreted as an old-style -C flag. - - - Scanners generated by flex now include two #define's giving - the major and minor version numbers (YY_FLEX_MAJOR_VERSION, - YY_FLEX_MINOR_VERSION). These can then be tested to see - whether certain flex features are available. - - - Scanners generated using -l lex compatibility now have the symbol - YY_FLEX_LEX_COMPAT #define'd. - - - When initializing (i.e., yy_init is non-zero on entry to yylex()), - generated scanners now set yy_init to zero before executing - YY_USER_INIT. This means that you can set yy_init back to a - non-zero value in YY_USER_INIT if you need the scanner to be - reinitialized on the next call. - - - You can now use "#line" directives in the first section of your - scanner specification. - - - When generating full-table scanners (-Cf), flex now puts braces - around each row of the 2-d array initialization, to silence warnings - on over-zealous compilers. - - - Improved support for MS-DOS. The flex sources have been successfully - built, unmodified, for Borland 4.02 (all that's required is a - Borland Makefile and config.h file, which are supplied in - MISC/Borland - contributed by Terrence O Kane). - - - Improved support for Macintosh using Think C - the sources should - build for this platform "out of the box". Contributed by Scott - Hofmann. - - - Improved support for VMS, in MISC/VMS/, contributed by Pat Rankin. - - - Support for the Amiga, in MISC/Amiga/, contributed by Andreas - Scherer. Note that the contributed files were developed for - flex 2.4 and have not been tested with flex 2.5. - - - Some notes on support for the NeXT, in MISC/NeXT, contributed - by Raf Schietekat. - - - The MISC/ directory now includes a preformatted version of flex.1 - in flex.man, and pre-yacc'd versions of parse.y in parse.{c,h}. - - - The flex.1 and flexdoc.1 manual pages have been merged. There - is now just one document, flex.1, which includes an overview - at the beginning to help you find the section you need. - - - Documentation now clarifies that start conditions persist across - switches to new input files or different input buffers. If you - want to e.g., return to INITIAL, you must explicitly do so. - - - The "Performance Considerations" section of the manual has been - updated. - - - Documented the "yy_act" variable, which when YY_USER_ACTION is - invoked holds the number of the matched rule, and added an - example of using yy_act to profile how often each rule is matched. - - - Added YY_NUM_RULES, a definition that gives the total number - of rules in the file, including the default rule (even if you - use -s). - - - Documentation now clarifies that you can pass a nil FILE* pointer - to yy_create_buffer() or yyrestart() if you've arrange YY_INPUT - to not need yyin. - - - Documentation now clarifies that YY_BUFFER_STATE is a pointer to - an opaque "struct yy_buffer_state". - - - Documentation now stresses that you gain the benefits of removing - backing-up states only if you remove *all* of them. - - - Documentation now points out that traditional lex allows you - to put the action on a separate line from the rule pattern if - the pattern has trailing whitespace (ugh!), but flex doesn't - support this. - - - A broken example in documentation of the difference between - inclusive and exclusive start conditions is now fixed. - - - Usage (-h) report now goes to stdout. - - - Version (-V) info now goes to stdout. - - - More #ifdef chud has been added to the parser in attempt to - deal with bison's use of alloca(). - - - "make clean" no longer deletes emacs backup files (*~). - - - Some memory leaks have been fixed. - - - A bug was fixed in which dynamically-expanded buffers were - reallocated a couple of bytes too small. - - - A bug was fixed which could cause flex to read and write beyond - the end of the input buffer. - - - -S will not be going away. - - -Changes between release 2.4.7 (03Aug94) and release 2.4.6: - - - Fixed serious bug in reading multiple files. - - - Fixed bug in scanning NUL's. - - - Fixed bug in input() returning 8-bit characters. - - - Fixed bug in matching text with embedded NUL's when - using %array or lex compatibility. - - - Fixed multiple invocations of YY_USER_ACTION when using '|' - continuation action. - - - Minor prototyping fixes. - -Changes between release 2.4.6 (04Jan94) and release 2.4.5: - - - Linking with -lfl no longer required if your program includes - its own yywrap() and main() functions. (This change will cause - problems if you have a non-ANSI compiler on a system for which - sizeof(int) != sizeof(void*) or sizeof(int) != sizeof(size_t).) - - - The use of 'extern "C++"' in FlexLexer.h has been modified to - get around an incompatibility with g++'s header files. - -Changes between release 2.4.5 (11Dec93) and release 2.4.4: - - - Fixed bug breaking C++ scanners that use REJECT or variable - trailing context. - - - Fixed serious input problem for interactive scanners on - systems for which char is unsigned. - - - Fixed bug in incorrectly treating '$' operator as variable - trailing context. - - - Fixed bug in -CF table representation that could lead to - corrupt tables. - - - Fixed fairly benign memory leak. - - - Added `extern "C++"' wrapper to FlexLexer.h header. This - should overcome the g++ 2.5.X problems mentioned in the - NEWS for release 2.4.3. - - - Changed #include of FlexLexer.h to use <> instead of "". - - - Added feature to control whether the scanner attempts to - refill the input buffer once it's exhausted. This feature - will be documented in the 2.5 release. - - -Changes between release 2.4.4 (07Dec93) and release 2.4.3: - - - Fixed two serious bugs in scanning 8-bit characters. - - - Fixed bug in YY_USER_ACTION that caused it to be executed - inappropriately (on the scanner's own internal actions, and - with incorrect yytext/yyleng values). - - - Fixed bug in pointing yyin at a new file and resuming scanning. - - - Portability fix regarding min/max/abs macros conflicting with - function definitions in standard header files. - - - Added a virtual LexerError() method to the C++ yyFlexLexer class - for reporting error messages instead of always using cerr. - - - Added warning in flexdoc that the C++ scanning class is presently - experimental and subject to considerable change between major - releases. - - -Changes between release 2.4.3 (03Dec93) and release 2.4.2: - - - Fixed bug causing fatal scanner messages to fail to print. - - - Fixed things so FlexLexer.h can be included in other C++ - sources. One side-effect of this change is that -+ and -CF - are now incompatible. - - - libfl.a now supplies private versions of the the / - string routines needed by flex and the scanners - it generates, to enhance portability to some BSD systems. - - - More robust solution to 2.4.2's flexfatal() bug fix. - - - Added ranlib of installed libfl.a. - - - Some lint tweaks. - - - NOTE: problems have been encountered attempting to build flex - C++ scanners using g++ version 2.5.X. The problem is due to an - unfortunate heuristic in g++ 2.5.X that attempts to discern between - C and C++ headers. Because FlexLexer.h is installed (by default) - in /usr/local/include and not /usr/local/lib/g++-include, g++ 2.5.X - decides that it's a C header :-(. So if you have problems, install - the header in /usr/local/lib/g++-include instead. - - -Changes between release 2.4.2 (01Dec93) and release 2.4.1: - - - Fixed bug in libfl.a referring to non-existent "flexfatal" function. - - - Modified to produce both compress'd and gzip'd tar files for - distributions (you probably don't care about this change!). - - -Changes between release 2.4.1 (30Nov93) and release 2.3.8: - - - The new '-+' flag instructs flex to generate a C++ scanner class - (thanks to Kent Williams). flex writes an implementation of the - class defined in FlexLexer.h to lex.yy.cc. You may include - multiple scanner classes in your program using the -P flag. Note - that the scanner class also provides a mechanism for creating - reentrant scanners. The scanner class uses C++ streams for I/O - instead of FILE*'s (thanks to Tom Epperly). If the flex executable's - name ends in '+' then the '-+' flag is automatically on, so creating - a symlink or copy of "flex" to "flex++" results in a version of - flex that can be used exclusively for C++ scanners. - - Note that without the '-+' flag, flex-generated scanners can still - be compiled using C++ compilers, though they use FILE*'s for I/O - instead of streams. - - See the "GENERATING C++ SCANNERS" section of flexdoc for details. - - - The new '-l' flag turns on maximum AT&T lex compatibility. In - particular, -l includes support for "yylineno" and makes yytext - be an array instead of a pointer. It does not, however, do away - with all incompatibilities. See the "INCOMPATIBILITIES WITH LEX - AND POSIX" section of flexdoc for details. - - - The new '-P' option specifies a prefix to use other than "yy" - for the scanner's globally-visible variables, and for the - "lex.yy.c" filename. Using -P you can link together multiple - flex scanners in the same executable. - - - The distribution includes a "texinfo" version of flexdoc.1, - contributed by Roland Pesch (thanks also to Marq Kole, who - contributed another version). It has not been brought up to - date, but reflects version 2.3. See MISC/flex.texinfo. - - The flex distribution will soon include G.T. Nicol's flex - manual; he is presently bringing it up-to-date for version 2.4. - - - yywrap() is now a function, and you now *must* link flex scanners - with libfl.a. - - - Site-configuration is now done via an autoconf-generated - "configure" script contributed by Francois Pinard. - - - Scanners now use fread() (or getc(), if interactive) and not - read() for input. A new "table compression" option, -Cr, - overrides this change and causes the scanner to use read() - (because read() is a bit faster than fread()). -f and -F - are now equivalent to -Cfr and -CFr; i.e., they imply the - -Cr option. - - - In the blessed name of POSIX compliance, flex supports "%array" - and "%pointer" directives in the definitions (first) section of - the scanner specification. The former specifies that yytext - should be an array (of size YYLMAX), the latter, that it should - be a pointer. The array version of yytext is universally slower - than the pointer version, but has the advantage that its contents - remain unmodified across calls to input() and unput() (the pointer - version of yytext is, still, trashed by such calls). - - "%array" cannot be used with the '-+' C++ scanner class option. - - - The new '-Ca' option directs flex to trade off memory for - natural alignment when generating a scanner's tables. In - particular, table entries that would otherwise be "short" - become "long". - - - The new '-h' option produces a summary of the flex flags. - - - The new '-V' option reports the flex version number and exits. - - - The new scanner macro YY_START returns an integer value - corresponding to the current start condition. You can return - to that start condition by passing the value to a subsequent - "BEGIN" action. You also can implement "start condition stacks" - by storing the values in an integer stack. - - - You can now redefine macros such as YY_INPUT by just #define'ing - them to some other value in the first section of the flex input; - no need to first #undef them. - - - flex now generates warnings for rules that can't be matched. - These warnings can be turned off using the new '-w' flag. If - your scanner uses REJECT then you will not get these warnings. - - - If you specify the '-s' flag but the default rule can be matched, - flex now generates a warning. - - - "yyleng" is now a global, and may be modified by the user (though - doing so and then using yymore() will yield weird results). - - - Name definitions in the first section of a scanner specification - can now include a leading '^' or trailing '$' operator. In this - case, the definition is *not* pushed back inside of parentheses. - - - Scanners with compressed tables are now "interactive" (-I option) - by default. You can suppress this attribute (which makes them - run slightly slower) using the new '-B' flag. - - - Flex now generates 8-bit scanners by default, unless you use the - -Cf or -CF compression options (-Cfe and -CFe result in 8-bit - scanners). You can force it to generate a 7-bit scanner using - the new '-7' flag. You can build flex to generate 8-bit scanners - for -Cf and -CF, too, by adding -DDEFAULT_CSIZE=256 to CFLAGS - in the Makefile. - - - You no longer need to call the scanner routine yyrestart() to - inform the scanner that you have switched to a new file after - having seen an EOF on the current input file. Instead, just - point yyin at the new file and continue scanning. - - - You no longer need to invoke YY_NEW_FILE in an <> action - to indicate you wish to continue scanning. Simply point yyin - at a new file. - - - A leading '#' no longer introduces a comment in a flex input. - - - flex no longer considers formfeed ('\f') a whitespace character. - - - %t, I'm happy to report, has been nuked. - - - The '-p' option may be given twice ('-pp') to instruct flex to - report minor performance problems as well as major ones. - - - The '-v' verbose output no longer includes start/finish time - information. - - - Newlines in flex inputs can optionally include leading or - trailing carriage-returns ('\r'), in support of several PC/Mac - run-time libraries that automatically include these. - - - A start condition of the form "<*>" makes the following rule - active in every start condition, whether exclusive or inclusive. - - - The following items have been corrected in the flex documentation: - - - '-C' table compression options *are* cumulative. - - - You may modify yytext but not lengthen it by appending - characters to the end. Modifying its final character - will affect '^' anchoring for the next rule matched - if the character is changed to or from a newline. - - - The term "backtracking" has been renamed "backing up", - since it is a one-time repositioning and not a repeated - search. What used to be the "lex.backtrack" file is now - "lex.backup". - - - Unindented "/* ... */" comments are allowed in the first - flex input section, but not in the second. - - - yyless() can only be used in the flex input source, not - externally. - - - You can use "yyrestart(yyin)" to throw away the - current contents of the input buffer. - - - To write high-speed scanners, attempt to match as much - text as possible with each rule. See MISC/fastwc/README - for more information. - - - Using the beginning-of-line operator ('^') is fairly - cheap. Using unput() is expensive. Using yyless() is - cheap. - - - An example of scanning strings with embedded escape - sequences has been added. - - - The example of backing-up in flexdoc was erroneous; it - has been corrected. - - - A flex scanner's internal buffer now dynamically grows if needed - to match large tokens. Note that growing the buffer presently - requires rescanning the (large) token, so consuming a lot of - text this way is a slow process. Also note that presently the - buffer does *not* grow if you unput() more text than can fit - into the buffer. - - - The MISC/ directory has been reorganized; see MISC/README for - details. - - - yyless() can now be used in the third (user action) section - of a scanner specification, thanks to Ceriel Jacobs. yyless() - remains a macro and cannot be used outside of the scanner source. - - - The skeleton file is no longer opened at run-time, but instead - compiled into a large string array (thanks to John Gilmore and - friends at Cygnus). You can still use the -S flag to point flex - at a different skeleton file. - - - flex no longer uses a temporary file to store the scanner's - actions. - - - A number of changes have been made to decrease porting headaches. - In particular, flex no longer uses memset() or ctime(), and - provides a single simple mechanism for dealing with C compilers - that still define malloc() as returning char* instead of void*. - - - Flex now detects if the scanner specification requires the -8 flag - but the flag was not given or on by default. - - - A number of table-expansion fencepost bugs have been fixed, - making flex more robust for generating large scanners. - - - flex more consistently identifies the location of errors in - its input. - - - YY_USER_ACTION is now invoked only for "real" actions, not for - internal actions used by the scanner for things like filling - the buffer or handling EOF. - - - The rule "[^]]" now matches any character other than a ']'; - formerly it matched any character at all followed by a ']'. - This change was made for compatibility with AT&T lex. - - - A large number of miscellaneous bugs have been found and fixed - thanks to Gerhard Wilhelms. - - - The source code has been heavily reformatted, making patches - relative to previous flex releases no longer accurate. - - -Changes between 2.3 Patch #8 (21Feb93) and 2.3 Patch #7: - - - Fixed bugs in dynamic memory allocation leading to grievous - fencepost problems when generating large scanners. - - Fixed bug causing infinite loops on character classes with 8-bit - characters in them. - - Fixed bug in matching repetitions with a lower bound of 0. - - Fixed bug in scanning NUL characters using an "interactive" scanner. - - Fixed bug in using yymore() at the end of a file. - - Fixed bug in misrecognizing rules with variable trailing context. - - Fixed bug compiling flex on Suns using gcc 2. - - Fixed bug in not recognizing that input files with the character - ASCII 128 in them require the -8 flag. - - Fixed bug that could cause an infinite loop writing out - error messages. - - Fixed bug in not recognizing old-style lex % declarations if - followed by a tab instead of a space. - - Fixed potential crash when flex terminated early (usually due - to a bad flag) and the -v flag had been given. - - Added some missing declarations of void functions. - - Changed to only use '\a' for __STDC__ compilers. - - Updated mailing addresses. - - -Changes between 2.3 Patch #7 (28Mar91) and 2.3 Patch #6: - - - Fixed out-of-bounds array access that caused bad tables - to be produced on machines where the bad reference happened - to yield a 1. This caused problems installing or running - flex on some Suns, in particular. - - -Changes between 2.3 Patch #6 (29Aug90) and 2.3 Patch #5: - - - Fixed a serious bug in yymore() which basically made it - completely broken. Thanks goes to Jean Christophe of - the Nethack development team for finding the problem - and passing along the fix. - - -Changes between 2.3 Patch #5 (16Aug90) and 2.3 Patch #4: - - - An up-to-date version of initscan.c so "make test" will - work after applying the previous patches - - -Changes between 2.3 Patch #4 (14Aug90) and 2.3 Patch #3: - - - Fixed bug in hexadecimal escapes which allowed only digits, - not letters, in escapes - - Fixed bug in previous "Changes" file! - - -Changes between 2.3 Patch #3 (03Aug90) and 2.3 Patch #2: - - - Correction to patch #2 for gcc compilation; thanks goes to - Paul Eggert for catching this. - - -Changes between 2.3 Patch #2 (02Aug90) and original 2.3 release: - - - Fixed (hopefully) headaches involving declaring malloc() - and free() for gcc, which defines __STDC__ but (often) doesn't - come with the standard include files such as . - Reordered #ifdef maze in the scanner skeleton in the hope of - getting the declarations right for cfront and g++, too. - - - Note that this patch supercedes patch #1 for release 2.3, - which was never announced but was available briefly for - anonymous ftp. - - -Changes between 2.3 (full) release of 28Jun90 and 2.2 (alpha) release: - - User-visible: - - - A lone <> rule (that is, one which is not qualified with - a list of start conditions) now specifies the EOF action for - *all* start conditions which haven't already had <> actions - given. To specify an end-of-file action for just the initial - state, use <>. - - - -d debug output is now contigent on the global yy_flex_debug - being set to a non-zero value, which it is by default. - - - A new macro, YY_USER_INIT, is provided for the user to specify - initialization action to be taken on the first call to the - scanner. This action is done before the scanner does its - own initialization. - - - yy_new_buffer() has been added as an alias for yy_create_buffer() - - - Comments beginning with '#' and extending to the end of the line - now work, but have been deprecated (in anticipation of making - flex recognize #line directives). - - - The funky restrictions on when semi-colons could follow the - YY_NEW_FILE and yyless macros have been removed. They now - behave identically to functions. - - - A bug in the sample redefinition of YY_INPUT in the documentation - has been corrected. - - - A bug in the sample simple tokener in the documentation has - been corrected. - - - The documentation on the incompatibilities between flex and - lex has been reordered so that the discussion of yylineno - and input() come first, as it's anticipated that these will - be the most common source of headaches. - - - Things which didn't used to be documented but now are: - - - flex interprets "^foo|bar" differently from lex. flex interprets - it as "match either a 'foo' or a 'bar', providing it comes at the - beginning of a line", whereas lex interprets it as "match either - a 'foo' at the beginning of a line, or a 'bar' anywhere". - - - flex initializes the global "yyin" on the first call to the - scanner, while lex initializes it at compile-time. - - - yy_switch_to_buffer() can be used in the yywrap() macro/routine. - - - flex scanners do not use stdio for their input, and hence when - writing an interactive scanner one must explictly call fflush() - after writing out a prompt. - - - flex scanner can be made reentrant (after a fashion) by using - "yyrestart( yyin );". This is useful for interactive scanners - which have interrupt handlers that long-jump out of the scanner. - - - a defense of why yylineno is not supported is included, along - with a suggestion on how to convert scanners which rely on it. - - - Other changes: - - - Prototypes and proper declarations of void routines have - been added to the flex source code, courtesy of Kevin B. Kenny. - - - Routines dealing with memory allocation now use void* pointers - instead of char* - see Makefile for porting implications. - - - Error-checking is now done when flex closes a file. - - - Various lint tweaks were added to reduce the number of gripes. - - - Makefile has been further parameterized to aid in porting. - - - Support for SCO Unix added. - - - Flex now sports the latest & greatest UC copyright notice - (which is only slightly different from the previous one). - - - A note has been added to flexdoc.1 mentioning work in progress - on modifying flex to generate straight C code rather than a - table-driven automaton, with an email address of whom to contact - if you are working along similar lines. - - -Changes between 2.2 Patch #3 (30Mar90) and 2.2 Patch #2: - - - fixed bug which caused -I scanners to bomb - - -Changes between 2.2 Patch #2 (27Mar90) and 2.2 Patch #1: - - - fixed bug writing past end of input buffer in yyunput() - - fixed bug detecting NUL's at the end of a buffer - - -Changes between 2.2 Patch #1 (23Mar90) and 2.2 (alpha) release: - - - Makefile fixes: definition of MAKE variable for systems - which don't have it; installation of flexdoc.1 along with - flex.1; fixed two bugs which could cause "bigtest" to fail. - - - flex.skel fix for compiling with g++. - - - README and flexdoc.1 no longer list an out-of-date BITNET address - for contacting me. - - - minor typos and formatting changes to flex.1 and flexdoc.1. - - -Changes between 2.2 (alpha) release of March '90 and previous release: - - User-visible: - - - Full user documentation now available. - - - Support for 8-bit scanners. - - - Scanners now accept NUL's. - - - A facility has been added for dealing with multiple - input buffers. - - - Two manual entries now. One which fully describes flex - (rather than just its differences from lex), and the - other for quick(er) reference. - - - A number of changes to bring flex closer into compliance - with the latest POSIX lex draft: - - %t support - flex now accepts multiple input files and concatenates - them together to form its input - previous -c (compress) flag renamed -C - do-nothing -c and -n flags added - Any indented code or code within %{}'s in section 2 is - now copied to the output - - - yyleng is now a bona fide global integer. - - - -d debug information now gives the line number of the - matched rule instead of which number rule it was from - the beginning of the file. - - - -v output now includes a summary of the flags used to generate - the scanner. - - - unput() and yyrestart() are now globally callable. - - - yyrestart() no longer closes the previous value of yyin. - - - C++ support; generated scanners can be compiled with C++ compiler. - - - Primitive -lfl library added, containing default main() - which calls yylex(). A number of routines currently living - in the scanner skeleton will probably migrate to here - in the future (in particular, yywrap() will probably cease - to be a macro and instead be a function in the -lfl library). - - - Hexadecimal (\x) escape sequences added. - - - Support for MS-DOS, VMS, and Turbo-C integrated. - - - The %used/%unused operators have been deprecated. They - may go away soon. - - - Other changes: - - - Makefile enhanced for easier testing and installation. - - The parser has been tweaked to detect some erroneous - constructions which previously were missed. - - Scanner input buffer overflow is now detected. - - Bugs with missing "const" declarations fixed. - - Out-of-date Minix/Atari patches provided. - - Scanners no longer require printf() unless FLEX_DEBUG is being used. - - A subtle input() bug has been fixed. - - Line numbers for "continued action" rules (those following - the special '|' action) are now correct. - - unput() bug fixed; had been causing problems porting flex to VMS. - - yymore() handling rewritten to fix bug with interaction - between yymore() and trailing context. - - EOF in actions now generates an error message. - - Bug involving -CFe and generating equivalence classes fixed. - - Bug which made -CF be treated as -Cf fixed. - - Support for SysV tmpnam() added. - - Unused #define's for scanner no longer generated. - - Error messages which are associated with a particular input - line are now all identified with their input line in standard - format. - - % directives which are valid to lex but not to flex are - now ignored instead of generating warnings. - - -DSYS_V flag can now also be specified -DUSG for System V - compilation. - - -Changes between 2.1 beta-test release of June '89 and previous release: - - User-visible: - - - -p flag generates a performance report to stderr. The report - consists of comments regarding features of the scanner rules - which result in slower scanners. - - - -b flag generates backtracking information to lex.backtrack. - This is a list of scanner states which require backtracking - and the characters on which they do so. By adding rules - one can remove backtracking states. If all backtracking states - are eliminated, the generated scanner will run faster. - Backtracking is not yet documented in the manual entry. - - - Variable trailing context now works, i.e., one can have - rules like "(foo)*/[ \t]*bletch". Some trailing context - patterns still cannot be properly matched and generate - error messages. These are patterns where the ending of the - first part of the rule matches the beginning of the second - part, such as "zx*/xy*", where the 'x*' matches the 'x' at - the beginning of the trailing context. Lex won't get these - patterns right either. - - - Faster scanners. - - - End-of-file rules. The special rule "<>" indicates - actions which are to be taken when an end-of-file is - encountered and yywrap() returns non-zero (i.e., indicates - no further files to process). See manual entry for example. - - - The -r (reject used) flag is gone. flex now scans the input - for occurrences of the string "REJECT" to determine if the - action is needed. It tries to be intelligent about this but - can be fooled. One can force the presence or absence of - REJECT by adding a line in the first section of the form - "%used REJECT" or "%unused REJECT". - - - yymore() has been implemented. Similarly to REJECT, flex - detects the use of yymore(), which can be overridden using - "%used" or "%unused". - - - Patterns like "x{0,3}" now work (i.e., with lower-limit == 0). - - - Removed '\^x' for ctrl-x misfeature. - - - Added '\a' and '\v' escape sequences. - - - \ now works for octal escape sequences; previously - \0 was required. - - - Better error reporting; line numbers are associated with rules. - - - yyleng is a macro; it cannot be accessed outside of the - scanner source file. - - - yytext and yyleng should not be modified within a flex action. - - - Generated scanners #define the name FLEX_SCANNER. - - - Rules are internally separated by YY_BREAK in lex.yy.c rather - than break, to allow redefinition. - - - The macro YY_USER_ACTION can be redefined to provide an action - which is always executed prior to the matched rule's action. - - - yyrestart() is a new action which can be used to restart - the scanner after it has seen an end-of-file (a "real" one, - that is, one for which yywrap() returned non-zero). It takes - a FILE* argument indicating a new file to scan and sets - things up so that a subsequent call to yylex() will start - scanning that file. - - - Internal scanner names all preceded by "yy_" - - - lex.yy.c is deleted if errors are encountered during processing. - - - Comments may be put in the first section of the input by preceding - them with '#'. - - - - Other changes: - - - Some portability-related bugs fixed, in particular for machines - with unsigned characters or sizeof( int* ) != sizeof( int ). - Also, tweaks for VMS and Microsoft C (MS-DOS), and identifiers all - trimmed to be 31 or fewer characters. Shortened file names - for dinosaur OS's. Checks for allocating > 64K memory - on 16 bit'ers. Amiga tweaks. Compiles using gcc on a Sun-3. - - Compressed and fast scanner skeletons merged. - - Skeleton header files done away with. - - Generated scanner uses prototypes and "const" for __STDC__. - - -DSV flag is now -DSYS_V for System V compilation. - - Removed all references to FTL language. - - Software now covered by BSD Copyright. - - flex will replace lex in subsequent BSD releases. diff --git a/commands/flex-2.5.4/README b/commands/flex-2.5.4/README deleted file mode 100644 index 7a4224dca..000000000 --- a/commands/flex-2.5.4/README +++ /dev/null @@ -1,60 +0,0 @@ -This is release 2.5 of flex. See "version.h" for the exact patch-level. - -See the file "NEWS" to find out what is new in this Flex release. - -Read the file "INSTALL" for general installation directives. Peek near -the beginning of the file "Makefile.in" for special DEFS values. On most -systems, you can just run the "configure" script and type "make" to build -flex; then "make check" to test whether it built correctly; and if it did, -then "make install" to install it. - -If you're feeling adventurous, you can also issue "make bigcheck" (be -prepared to wait a while). - -Note that flex is distributed under a copyright very similar to that of -BSD Unix, and not under the GNU General Public License (GPL), except for -the "configure" script, which is covered by the GPL. - -Many thanks to the 2.5 beta-testers for finding bugs and helping test and -increase portability: Stan Adermann, Scott David Daniels, Charles Elliott, -Joe Gayda, Chris Meier, James Nordby, Terrence O'Kane, Karsten Pahnke, -Francois Pinard, Pat Rankin, Andreas Scherer, Marc Wiese, Nathan Zelle. - -Please send bug reports and feedback to: Vern Paxson (vern@ee.lbl.gov). - - -The flex distribution consists of the following files: - - README This message - - NEWS Differences between the various releases - - INSTALL General installation information - - COPYING flex's copyright - - conf.in, configure.in, configure, Makefile.in, install.sh, - mkinstalldirs - elements of the "autoconf" auto-configuration process - - flexdef.h, parse.y, scan.l, ccl.c, dfa.c, ecs.c, gen.c, main.c, - misc.c, nfa.c, sym.c, tblcmp.c, yylex.c - source files - - version.h version of this flex release - - flex.skl flex scanner skeleton - mkskel.sh script for converting flex.skl to C source file skel.c - skel.c pre-converted C version of flex.skl - - libmain.c flex library (-lfl) sources - libyywrap.c - - initscan.c pre-flex'd version of scan.l - - FlexLexer.h header file for C++ lexer class - - flex.1 user documentation - - MISC/ a directory containing miscellaneous contributions. - See MISC/README for details. diff --git a/commands/flex-2.5.4/build b/commands/flex-2.5.4/build deleted file mode 100755 index a56370ab0..000000000 --- a/commands/flex-2.5.4/build +++ /dev/null @@ -1,5 +0,0 @@ -#!/bin/sh -CC=cc /bin/sh ./configure --prefix=/usr/local && make all -if [ "$1" != build ] -then make install -fi diff --git a/commands/flex-2.5.4/ccl.c b/commands/flex-2.5.4/ccl.c deleted file mode 100644 index 12e992c03..000000000 --- a/commands/flex-2.5.4/ccl.c +++ /dev/null @@ -1,149 +0,0 @@ -/* ccl - routines for character classes */ - -/*- - * Copyright (c) 1990 The Regents of the University of California. - * All rights reserved. - * - * This code is derived from software contributed to Berkeley by - * Vern Paxson. - * - * The United States Government has rights in this work pursuant - * to contract no. DE-AC03-76SF00098 between the United States - * Department of Energy and the University of California. - * - * Redistribution and use in source and binary forms with or without - * modification are permitted provided that: (1) source distributions retain - * this entire copyright notice and comment, and (2) distributions including - * binaries display the following acknowledgement: ``This product includes - * software developed by the University of California, Berkeley and its - * contributors'' in the documentation or other materials provided with the - * distribution and in all advertising materials mentioning features or use - * of this software. Neither the name of the University nor the names of - * its contributors may be used to endorse or promote products derived from - * this software without specific prior written permission. - * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED - * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF - * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. - */ - -/* $Header$ */ - -#include "flexdef.h" - -/* ccladd - add a single character to a ccl */ - -void ccladd( cclp, ch ) -int cclp; -int ch; - { - int ind, len, newpos, i; - - check_char( ch ); - - len = ccllen[cclp]; - ind = cclmap[cclp]; - - /* check to see if the character is already in the ccl */ - - for ( i = 0; i < len; ++i ) - if ( ccltbl[ind + i] == ch ) - return; - - newpos = ind + len; - - if ( newpos >= current_max_ccl_tbl_size ) - { - current_max_ccl_tbl_size += MAX_CCL_TBL_SIZE_INCREMENT; - - ++num_reallocs; - - ccltbl = reallocate_Character_array( ccltbl, - current_max_ccl_tbl_size ); - } - - ccllen[cclp] = len + 1; - ccltbl[newpos] = ch; - } - - -/* cclinit - return an empty ccl */ - -int cclinit() - { - if ( ++lastccl >= current_maxccls ) - { - current_maxccls += MAX_CCLS_INCREMENT; - - ++num_reallocs; - - cclmap = reallocate_integer_array( cclmap, current_maxccls ); - ccllen = reallocate_integer_array( ccllen, current_maxccls ); - cclng = reallocate_integer_array( cclng, current_maxccls ); - } - - if ( lastccl == 1 ) - /* we're making the first ccl */ - cclmap[lastccl] = 0; - - else - /* The new pointer is just past the end of the last ccl. - * Since the cclmap points to the \first/ character of a - * ccl, adding the length of the ccl to the cclmap pointer - * will produce a cursor to the first free space. - */ - cclmap[lastccl] = cclmap[lastccl - 1] + ccllen[lastccl - 1]; - - ccllen[lastccl] = 0; - cclng[lastccl] = 0; /* ccl's start out life un-negated */ - - return lastccl; - } - - -/* cclnegate - negate the given ccl */ - -void cclnegate( cclp ) -int cclp; - { - cclng[cclp] = 1; - } - - -/* list_character_set - list the members of a set of characters in CCL form - * - * Writes to the given file a character-class representation of those - * characters present in the given CCL. A character is present if it - * has a non-zero value in the cset array. - */ - -void list_character_set( file, cset ) -FILE *file; -int cset[]; - { - register int i; - - putc( '[', file ); - - for ( i = 0; i < csize; ++i ) - { - if ( cset[i] ) - { - register int start_char = i; - - putc( ' ', file ); - - fputs( readable_form( i ), file ); - - while ( ++i < csize && cset[i] ) - ; - - if ( i - 1 > start_char ) - /* this was a run */ - fprintf( file, "-%s", readable_form( i - 1 ) ); - - putc( ' ', file ); - } - } - - putc( ']', file ); - } diff --git a/commands/flex-2.5.4/conf.in b/commands/flex-2.5.4/conf.in deleted file mode 100644 index 6cdcebebf..000000000 --- a/commands/flex-2.5.4/conf.in +++ /dev/null @@ -1,25 +0,0 @@ -/* $Header$ */ - -/* Define to empty if the keyword does not work. */ -#undef const - -/* Define to `unsigned' if doesn't define. */ -#undef size_t - -/* Define if you have the ANSI C header files. */ -#undef STDC_HEADERS - -/* Define if you have the header file. */ -#undef HAVE_MALLOC_H - -/* Define if you have the header file. */ -#undef HAVE_STRING_H - -/* Define if you have the header file. */ -#undef HAVE_SYS_TYPES_H - -/* Define if you have and it should be used (not on Ultrix). */ -#undef HAVE_ALLOCA_H - -/* Define if platform-specific command line handling is necessary. */ -#undef NEED_ARGV_FIXUP diff --git a/commands/flex-2.5.4/configure b/commands/flex-2.5.4/configure deleted file mode 100755 index be7f861b8..000000000 --- a/commands/flex-2.5.4/configure +++ /dev/null @@ -1,1632 +0,0 @@ -#!/bin/sh - -# Guess values for system-dependent variables and create Makefiles. -# Generated automatically using autoconf version 2.1 -# Copyright (C) 1992, 1993, 1994 Free Software Foundation, Inc. -# -# This configure script is free software; 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DE-AC03-76SF00098 between the United States - * Department of Energy and the University of California. - * - * Redistribution and use in source and binary forms with or without - * modification are permitted provided that: (1) source distributions retain - * this entire copyright notice and comment, and (2) distributions including - * binaries display the following acknowledgement: ``This product includes - * software developed by the University of California, Berkeley and its - * contributors'' in the documentation or other materials provided with the - * distribution and in all advertising materials mentioning features or use - * of this software. Neither the name of the University nor the names of - * its contributors may be used to endorse or promote products derived from - * this software without specific prior written permission. - * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED - * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF - * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. - */ - -/* $Header$ */ - -#include "flexdef.h" - - -/* declare functions that have forward references */ - -void dump_associated_rules PROTO((FILE*, int)); -void dump_transitions PROTO((FILE*, int[])); -void sympartition PROTO((int[], int, int[], int[])); -int symfollowset PROTO((int[], int, int, int[])); - - -/* check_for_backing_up - check a DFA state for backing up - * - * synopsis - * void check_for_backing_up( int ds, int state[numecs] ); - * - * ds is the number of the state to check and state[] is its out-transitions, - * indexed by equivalence class. - */ - -void check_for_backing_up( ds, state ) -int ds; -int state[]; - { - if ( (reject && ! dfaacc[ds].dfaacc_set) || - (! reject && ! dfaacc[ds].dfaacc_state) ) - { /* state is non-accepting */ - ++num_backing_up; - - if ( backing_up_report ) - { - fprintf( backing_up_file, - _( "State #%d is non-accepting -\n" ), ds ); - - /* identify the state */ - dump_associated_rules( backing_up_file, ds ); - - /* Now identify it further using the out- and - * jam-transitions. - */ - dump_transitions( backing_up_file, state ); - - putc( '\n', backing_up_file ); - } - } - } - - -/* check_trailing_context - check to see if NFA state set constitutes - * "dangerous" trailing context - * - * synopsis - * void check_trailing_context( int nfa_states[num_states+1], int num_states, - * int accset[nacc+1], int nacc ); - * - * NOTES - * Trailing context is "dangerous" if both the head and the trailing - * part are of variable size \and/ there's a DFA state which contains - * both an accepting state for the head part of the rule and NFA states - * which occur after the beginning of the trailing context. - * - * When such a rule is matched, it's impossible to tell if having been - * in the DFA state indicates the beginning of the trailing context or - * further-along scanning of the pattern. In these cases, a warning - * message is issued. - * - * nfa_states[1 .. num_states] is the list of NFA states in the DFA. - * accset[1 .. nacc] is the list of accepting numbers for the DFA state. - */ - -void check_trailing_context( nfa_states, num_states, accset, nacc ) -int *nfa_states, num_states; -int *accset; -int nacc; - { - register int i, j; - - for ( i = 1; i <= num_states; ++i ) - { - int ns = nfa_states[i]; - register int type = state_type[ns]; - register int ar = assoc_rule[ns]; - - if ( type == STATE_NORMAL || rule_type[ar] != RULE_VARIABLE ) - { /* do nothing */ - } - - else if ( type == STATE_TRAILING_CONTEXT ) - { - /* Potential trouble. Scan set of accepting numbers - * for the one marking the end of the "head". We - * assume that this looping will be fairly cheap - * since it's rare that an accepting number set - * is large. - */ - for ( j = 1; j <= nacc; ++j ) - if ( accset[j] & YY_TRAILING_HEAD_MASK ) - { - line_warning( - _( "dangerous trailing context" ), - rule_linenum[ar] ); - return; - } - } - } - } - - -/* dump_associated_rules - list the rules associated with a DFA state - * - * Goes through the set of NFA states associated with the DFA and - * extracts the first MAX_ASSOC_RULES unique rules, sorts them, - * and writes a report to the given file. - */ - -void dump_associated_rules( file, ds ) -FILE *file; -int ds; - { - register int i, j; - register int num_associated_rules = 0; - int rule_set[MAX_ASSOC_RULES + 1]; - int *dset = dss[ds]; - int size = dfasiz[ds]; - - for ( i = 1; i <= size; ++i ) - { - register int rule_num = rule_linenum[assoc_rule[dset[i]]]; - - for ( j = 1; j <= num_associated_rules; ++j ) - if ( rule_num == rule_set[j] ) - break; - - if ( j > num_associated_rules ) - { /* new rule */ - if ( num_associated_rules < MAX_ASSOC_RULES ) - rule_set[++num_associated_rules] = rule_num; - } - } - - bubble( rule_set, num_associated_rules ); - - fprintf( file, _( " associated rule line numbers:" ) ); - - for ( i = 1; i <= num_associated_rules; ++i ) - { - if ( i % 8 == 1 ) - putc( '\n', file ); - - fprintf( file, "\t%d", rule_set[i] ); - } - - putc( '\n', file ); - } - - -/* dump_transitions - list the transitions associated with a DFA state - * - * synopsis - * dump_transitions( FILE *file, int state[numecs] ); - * - * Goes through the set of out-transitions and lists them in human-readable - * form (i.e., not as equivalence classes); also lists jam transitions - * (i.e., all those which are not out-transitions, plus EOF). The dump - * is done to the given file. - */ - -void dump_transitions( file, state ) -FILE *file; -int state[]; - { - register int i, ec; - int out_char_set[CSIZE]; - - for ( i = 0; i < csize; ++i ) - { - ec = ABS( ecgroup[i] ); - out_char_set[i] = state[ec]; - } - - fprintf( file, _( " out-transitions: " ) ); - - list_character_set( file, out_char_set ); - - /* now invert the members of the set to get the jam transitions */ - for ( i = 0; i < csize; ++i ) - out_char_set[i] = ! out_char_set[i]; - - fprintf( file, _( "\n jam-transitions: EOF " ) ); - - list_character_set( file, out_char_set ); - - putc( '\n', file ); - } - - -/* epsclosure - construct the epsilon closure of a set of ndfa states - * - * synopsis - * int *epsclosure( int t[num_states], int *numstates_addr, - * int accset[num_rules+1], int *nacc_addr, - * int *hashval_addr ); - * - * NOTES - * The epsilon closure is the set of all states reachable by an arbitrary - * number of epsilon transitions, which themselves do not have epsilon - * transitions going out, unioned with the set of states which have non-null - * accepting numbers. t is an array of size numstates of nfa state numbers. - * Upon return, t holds the epsilon closure and *numstates_addr is updated. - * accset holds a list of the accepting numbers, and the size of accset is - * given by *nacc_addr. t may be subjected to reallocation if it is not - * large enough to hold the epsilon closure. - * - * hashval is the hash value for the dfa corresponding to the state set. - */ - -int *epsclosure( t, ns_addr, accset, nacc_addr, hv_addr ) -int *t, *ns_addr, accset[], *nacc_addr, *hv_addr; - { - register int stkpos, ns, tsp; - int numstates = *ns_addr, nacc, hashval, transsym, nfaccnum; - int stkend, nstate; - static int did_stk_init = false, *stk; - -#define MARK_STATE(state) \ -trans1[state] = trans1[state] - MARKER_DIFFERENCE; - -#define IS_MARKED(state) (trans1[state] < 0) - -#define UNMARK_STATE(state) \ -trans1[state] = trans1[state] + MARKER_DIFFERENCE; - -#define CHECK_ACCEPT(state) \ -{ \ -nfaccnum = accptnum[state]; \ -if ( nfaccnum != NIL ) \ -accset[++nacc] = nfaccnum; \ -} - -#define DO_REALLOCATION \ -{ \ -current_max_dfa_size += MAX_DFA_SIZE_INCREMENT; \ -++num_reallocs; \ -t = reallocate_integer_array( t, current_max_dfa_size ); \ -stk = reallocate_integer_array( stk, current_max_dfa_size ); \ -} \ - -#define PUT_ON_STACK(state) \ -{ \ -if ( ++stkend >= current_max_dfa_size ) \ -DO_REALLOCATION \ -stk[stkend] = state; \ -MARK_STATE(state) \ -} - -#define ADD_STATE(state) \ -{ \ -if ( ++numstates >= current_max_dfa_size ) \ -DO_REALLOCATION \ -t[numstates] = state; \ -hashval += state; \ -} - -#define STACK_STATE(state) \ -{ \ -PUT_ON_STACK(state) \ -CHECK_ACCEPT(state) \ -if ( nfaccnum != NIL || transchar[state] != SYM_EPSILON ) \ -ADD_STATE(state) \ -} - - - if ( ! did_stk_init ) - { - stk = allocate_integer_array( current_max_dfa_size ); - did_stk_init = true; - } - - nacc = stkend = hashval = 0; - - for ( nstate = 1; nstate <= numstates; ++nstate ) - { - ns = t[nstate]; - - /* The state could be marked if we've already pushed it onto - * the stack. - */ - if ( ! IS_MARKED(ns) ) - { - PUT_ON_STACK(ns) - CHECK_ACCEPT(ns) - hashval += ns; - } - } - - for ( stkpos = 1; stkpos <= stkend; ++stkpos ) - { - ns = stk[stkpos]; - transsym = transchar[ns]; - - if ( transsym == SYM_EPSILON ) - { - tsp = trans1[ns] + MARKER_DIFFERENCE; - - if ( tsp != NO_TRANSITION ) - { - if ( ! IS_MARKED(tsp) ) - STACK_STATE(tsp) - - tsp = trans2[ns]; - - if ( tsp != NO_TRANSITION && ! IS_MARKED(tsp) ) - STACK_STATE(tsp) - } - } - } - - /* Clear out "visit" markers. */ - - for ( stkpos = 1; stkpos <= stkend; ++stkpos ) - { - if ( IS_MARKED(stk[stkpos]) ) - UNMARK_STATE(stk[stkpos]) - else - flexfatal( - _( "consistency check failed in epsclosure()" ) ); - } - - *ns_addr = numstates; - *hv_addr = hashval; - *nacc_addr = nacc; - - return t; - } - - -/* increase_max_dfas - increase the maximum number of DFAs */ - -void increase_max_dfas() - { - current_max_dfas += MAX_DFAS_INCREMENT; - - ++num_reallocs; - - base = reallocate_integer_array( base, current_max_dfas ); - def = reallocate_integer_array( def, current_max_dfas ); - dfasiz = reallocate_integer_array( dfasiz, current_max_dfas ); - accsiz = reallocate_integer_array( accsiz, current_max_dfas ); - dhash = reallocate_integer_array( dhash, current_max_dfas ); - dss = reallocate_int_ptr_array( dss, current_max_dfas ); - dfaacc = reallocate_dfaacc_union( dfaacc, current_max_dfas ); - - if ( nultrans ) - nultrans = - reallocate_integer_array( nultrans, current_max_dfas ); - } - - -/* ntod - convert an ndfa to a dfa - * - * Creates the dfa corresponding to the ndfa we've constructed. The - * dfa starts out in state #1. - */ - -void ntod() - { - int *accset, ds, nacc, newds; - int sym, hashval, numstates, dsize; - int num_full_table_rows; /* used only for -f */ - int *nset, *dset; - int targptr, totaltrans, i, comstate, comfreq, targ; - int symlist[CSIZE + 1]; - int num_start_states; - int todo_head, todo_next; - - /* Note that the following are indexed by *equivalence classes* - * and not by characters. Since equivalence classes are indexed - * beginning with 1, even if the scanner accepts NUL's, this - * means that (since every character is potentially in its own - * equivalence class) these arrays must have room for indices - * from 1 to CSIZE, so their size must be CSIZE + 1. - */ - int duplist[CSIZE + 1], state[CSIZE + 1]; - int targfreq[CSIZE + 1], targstate[CSIZE + 1]; - - accset = allocate_integer_array( num_rules + 1 ); - nset = allocate_integer_array( current_max_dfa_size ); - - /* The "todo" queue is represented by the head, which is the DFA - * state currently being processed, and the "next", which is the - * next DFA state number available (not in use). We depend on the - * fact that snstods() returns DFA's \in increasing order/, and thus - * need only know the bounds of the dfas to be processed. - */ - todo_head = todo_next = 0; - - for ( i = 0; i <= csize; ++i ) - { - duplist[i] = NIL; - symlist[i] = false; - } - - for ( i = 0; i <= num_rules; ++i ) - accset[i] = NIL; - - if ( trace ) - { - dumpnfa( scset[1] ); - fputs( _( "\n\nDFA Dump:\n\n" ), stderr ); - } - - inittbl(); - - /* Check to see whether we should build a separate table for - * transitions on NUL characters. We don't do this for full-speed - * (-F) scanners, since for them we don't have a simple state - * number lying around with which to index the table. We also - * don't bother doing it for scanners unless (1) NUL is in its own - * equivalence class (indicated by a positive value of - * ecgroup[NUL]), (2) NUL's equivalence class is the last - * equivalence class, and (3) the number of equivalence classes is - * the same as the number of characters. This latter case comes - * about when useecs is false or when it's true but every character - * still manages to land in its own class (unlikely, but it's - * cheap to check for). If all these things are true then the - * character code needed to represent NUL's equivalence class for - * indexing the tables is going to take one more bit than the - * number of characters, and therefore we won't be assured of - * being able to fit it into a YY_CHAR variable. This rules out - * storing the transitions in a compressed table, since the code - * for interpreting them uses a YY_CHAR variable (perhaps it - * should just use an integer, though; this is worth pondering ... - * ###). - * - * Finally, for full tables, we want the number of entries in the - * table to be a power of two so the array references go fast (it - * will just take a shift to compute the major index). If - * encoding NUL's transitions in the table will spoil this, we - * give it its own table (note that this will be the case if we're - * not using equivalence classes). - */ - - /* Note that the test for ecgroup[0] == numecs below accomplishes - * both (1) and (2) above - */ - if ( ! fullspd && ecgroup[0] == numecs ) - { - /* NUL is alone in its equivalence class, which is the - * last one. - */ - int use_NUL_table = (numecs == csize); - - if ( fulltbl && ! use_NUL_table ) - { - /* We still may want to use the table if numecs - * is a power of 2. - */ - int power_of_two; - - for ( power_of_two = 1; power_of_two <= csize; - power_of_two *= 2 ) - if ( numecs == power_of_two ) - { - use_NUL_table = true; - break; - } - } - - if ( use_NUL_table ) - nultrans = allocate_integer_array( current_max_dfas ); - - /* From now on, nultrans != nil indicates that we're - * saving null transitions for later, separate encoding. - */ - } - - - if ( fullspd ) - { - for ( i = 0; i <= numecs; ++i ) - state[i] = 0; - - place_state( state, 0, 0 ); - dfaacc[0].dfaacc_state = 0; - } - - else if ( fulltbl ) - { - if ( nultrans ) - /* We won't be including NUL's transitions in the - * table, so build it for entries from 0 .. numecs - 1. - */ - num_full_table_rows = numecs; - - else - /* Take into account the fact that we'll be including - * the NUL entries in the transition table. Build it - * from 0 .. numecs. - */ - num_full_table_rows = numecs + 1; - - /* Unless -Ca, declare it "short" because it's a real - * long-shot that that won't be large enough. - */ - out_str_dec( "static yyconst %s yy_nxt[][%d] =\n {\n", - /* '}' so vi doesn't get too confused */ - long_align ? "long" : "short", num_full_table_rows ); - - outn( " {" ); - - /* Generate 0 entries for state #0. */ - for ( i = 0; i < num_full_table_rows; ++i ) - mk2data( 0 ); - - dataflush(); - outn( " },\n" ); - } - - /* Create the first states. */ - - num_start_states = lastsc * 2; - - for ( i = 1; i <= num_start_states; ++i ) - { - numstates = 1; - - /* For each start condition, make one state for the case when - * we're at the beginning of the line (the '^' operator) and - * one for the case when we're not. - */ - if ( i % 2 == 1 ) - nset[numstates] = scset[(i / 2) + 1]; - else - nset[numstates] = - mkbranch( scbol[i / 2], scset[i / 2] ); - - nset = epsclosure( nset, &numstates, accset, &nacc, &hashval ); - - if ( snstods( nset, numstates, accset, nacc, hashval, &ds ) ) - { - numas += nacc; - totnst += numstates; - ++todo_next; - - if ( variable_trailing_context_rules && nacc > 0 ) - check_trailing_context( nset, numstates, - accset, nacc ); - } - } - - if ( ! fullspd ) - { - if ( ! snstods( nset, 0, accset, 0, 0, &end_of_buffer_state ) ) - flexfatal( - _( "could not create unique end-of-buffer state" ) ); - - ++numas; - ++num_start_states; - ++todo_next; - } - - while ( todo_head < todo_next ) - { - targptr = 0; - totaltrans = 0; - - for ( i = 1; i <= numecs; ++i ) - state[i] = 0; - - ds = ++todo_head; - - dset = dss[ds]; - dsize = dfasiz[ds]; - - if ( trace ) - fprintf( stderr, _( "state # %d:\n" ), ds ); - - sympartition( dset, dsize, symlist, duplist ); - - for ( sym = 1; sym <= numecs; ++sym ) - { - if ( symlist[sym] ) - { - symlist[sym] = 0; - - if ( duplist[sym] == NIL ) - { - /* Symbol has unique out-transitions. */ - numstates = symfollowset( dset, dsize, - sym, nset ); - nset = epsclosure( nset, &numstates, - accset, &nacc, &hashval ); - - if ( snstods( nset, numstates, accset, - nacc, hashval, &newds ) ) - { - totnst = totnst + numstates; - ++todo_next; - numas += nacc; - - if ( - variable_trailing_context_rules && - nacc > 0 ) - check_trailing_context( - nset, numstates, - accset, nacc ); - } - - state[sym] = newds; - - if ( trace ) - fprintf( stderr, "\t%d\t%d\n", - sym, newds ); - - targfreq[++targptr] = 1; - targstate[targptr] = newds; - ++numuniq; - } - - else - { - /* sym's equivalence class has the same - * transitions as duplist(sym)'s - * equivalence class. - */ - targ = state[duplist[sym]]; - state[sym] = targ; - - if ( trace ) - fprintf( stderr, "\t%d\t%d\n", - sym, targ ); - - /* Update frequency count for - * destination state. - */ - - i = 0; - while ( targstate[++i] != targ ) - ; - - ++targfreq[i]; - ++numdup; - } - - ++totaltrans; - duplist[sym] = NIL; - } - } - - if ( caseins && ! useecs ) - { - register int j; - - for ( i = 'A', j = 'a'; i <= 'Z'; ++i, ++j ) - { - if ( state[i] == 0 && state[j] != 0 ) - /* We're adding a transition. */ - ++totaltrans; - - else if ( state[i] != 0 && state[j] == 0 ) - /* We're taking away a transition. */ - --totaltrans; - - state[i] = state[j]; - } - } - - numsnpairs += totaltrans; - - if ( ds > num_start_states ) - check_for_backing_up( ds, state ); - - if ( nultrans ) - { - nultrans[ds] = state[NUL_ec]; - state[NUL_ec] = 0; /* remove transition */ - } - - if ( fulltbl ) - { - outn( " {" ); - - /* Supply array's 0-element. */ - if ( ds == end_of_buffer_state ) - mk2data( -end_of_buffer_state ); - else - mk2data( end_of_buffer_state ); - - for ( i = 1; i < num_full_table_rows; ++i ) - /* Jams are marked by negative of state - * number. - */ - mk2data( state[i] ? state[i] : -ds ); - - dataflush(); - outn( " },\n" ); - } - - else if ( fullspd ) - place_state( state, ds, totaltrans ); - - else if ( ds == end_of_buffer_state ) - /* Special case this state to make sure it does what - * it's supposed to, i.e., jam on end-of-buffer. - */ - stack1( ds, 0, 0, JAMSTATE ); - - else /* normal, compressed state */ - { - /* Determine which destination state is the most - * common, and how many transitions to it there are. - */ - - comfreq = 0; - comstate = 0; - - for ( i = 1; i <= targptr; ++i ) - if ( targfreq[i] > comfreq ) - { - comfreq = targfreq[i]; - comstate = targstate[i]; - } - - bldtbl( state, ds, totaltrans, comstate, comfreq ); - } - } - - if ( fulltbl ) - dataend(); - - else if ( ! fullspd ) - { - cmptmps(); /* create compressed template entries */ - - /* Create tables for all the states with only one - * out-transition. - */ - while ( onesp > 0 ) - { - mk1tbl( onestate[onesp], onesym[onesp], onenext[onesp], - onedef[onesp] ); - --onesp; - } - - mkdeftbl(); - } - - flex_free( (void *) accset ); - flex_free( (void *) nset ); - } - - -/* snstods - converts a set of ndfa states into a dfa state - * - * synopsis - * is_new_state = snstods( int sns[numstates], int numstates, - * int accset[num_rules+1], int nacc, - * int hashval, int *newds_addr ); - * - * On return, the dfa state number is in newds. - */ - -int snstods( sns, numstates, accset, nacc, hashval, newds_addr ) -int sns[], numstates, accset[], nacc, hashval, *newds_addr; - { - int didsort = 0; - register int i, j; - int newds, *oldsns; - - for ( i = 1; i <= lastdfa; ++i ) - if ( hashval == dhash[i] ) - { - if ( numstates == dfasiz[i] ) - { - oldsns = dss[i]; - - if ( ! didsort ) - { - /* We sort the states in sns so we - * can compare it to oldsns quickly. - * We use bubble because there probably - * aren't very many states. - */ - bubble( sns, numstates ); - didsort = 1; - } - - for ( j = 1; j <= numstates; ++j ) - if ( sns[j] != oldsns[j] ) - break; - - if ( j > numstates ) - { - ++dfaeql; - *newds_addr = i; - return 0; - } - - ++hshcol; - } - - else - ++hshsave; - } - - /* Make a new dfa. */ - - if ( ++lastdfa >= current_max_dfas ) - increase_max_dfas(); - - newds = lastdfa; - - dss[newds] = allocate_integer_array( numstates + 1 ); - - /* If we haven't already sorted the states in sns, we do so now, - * so that future comparisons with it can be made quickly. - */ - - if ( ! didsort ) - bubble( sns, numstates ); - - for ( i = 1; i <= numstates; ++i ) - dss[newds][i] = sns[i]; - - dfasiz[newds] = numstates; - dhash[newds] = hashval; - - if ( nacc == 0 ) - { - if ( reject ) - dfaacc[newds].dfaacc_set = (int *) 0; - else - dfaacc[newds].dfaacc_state = 0; - - accsiz[newds] = 0; - } - - else if ( reject ) - { - /* We sort the accepting set in increasing order so the - * disambiguating rule that the first rule listed is considered - * match in the event of ties will work. We use a bubble - * sort since the list is probably quite small. - */ - - bubble( accset, nacc ); - - dfaacc[newds].dfaacc_set = allocate_integer_array( nacc + 1 ); - - /* Save the accepting set for later */ - for ( i = 1; i <= nacc; ++i ) - { - dfaacc[newds].dfaacc_set[i] = accset[i]; - - if ( accset[i] <= num_rules ) - /* Who knows, perhaps a REJECT can yield - * this rule. - */ - rule_useful[accset[i]] = true; - } - - accsiz[newds] = nacc; - } - - else - { - /* Find lowest numbered rule so the disambiguating rule - * will work. - */ - j = num_rules + 1; - - for ( i = 1; i <= nacc; ++i ) - if ( accset[i] < j ) - j = accset[i]; - - dfaacc[newds].dfaacc_state = j; - - if ( j <= num_rules ) - rule_useful[j] = true; - } - - *newds_addr = newds; - - return 1; - } - - -/* symfollowset - follow the symbol transitions one step - * - * synopsis - * numstates = symfollowset( int ds[current_max_dfa_size], int dsize, - * int transsym, int nset[current_max_dfa_size] ); - */ - -int symfollowset( ds, dsize, transsym, nset ) -int ds[], dsize, transsym, nset[]; - { - int ns, tsp, sym, i, j, lenccl, ch, numstates, ccllist; - - numstates = 0; - - for ( i = 1; i <= dsize; ++i ) - { /* for each nfa state ns in the state set of ds */ - ns = ds[i]; - sym = transchar[ns]; - tsp = trans1[ns]; - - if ( sym < 0 ) - { /* it's a character class */ - sym = -sym; - ccllist = cclmap[sym]; - lenccl = ccllen[sym]; - - if ( cclng[sym] ) - { - for ( j = 0; j < lenccl; ++j ) - { - /* Loop through negated character - * class. - */ - ch = ccltbl[ccllist + j]; - - if ( ch == 0 ) - ch = NUL_ec; - - if ( ch > transsym ) - /* Transsym isn't in negated - * ccl. - */ - break; - - else if ( ch == transsym ) - /* next 2 */ goto bottom; - } - - /* Didn't find transsym in ccl. */ - nset[++numstates] = tsp; - } - - else - for ( j = 0; j < lenccl; ++j ) - { - ch = ccltbl[ccllist + j]; - - if ( ch == 0 ) - ch = NUL_ec; - - if ( ch > transsym ) - break; - else if ( ch == transsym ) - { - nset[++numstates] = tsp; - break; - } - } - } - - else if ( sym >= 'A' && sym <= 'Z' && caseins ) - flexfatal( - _( "consistency check failed in symfollowset" ) ); - - else if ( sym == SYM_EPSILON ) - { /* do nothing */ - } - - else if ( ABS( ecgroup[sym] ) == transsym ) - nset[++numstates] = tsp; - - bottom: ; - } - - return numstates; - } - - -/* sympartition - partition characters with same out-transitions - * - * synopsis - * sympartition( int ds[current_max_dfa_size], int numstates, - * int symlist[numecs], int duplist[numecs] ); - */ - -void sympartition( ds, numstates, symlist, duplist ) -int ds[], numstates; -int symlist[], duplist[]; - { - int tch, i, j, k, ns, dupfwd[CSIZE + 1], lenccl, cclp, ich; - - /* Partitioning is done by creating equivalence classes for those - * characters which have out-transitions from the given state. Thus - * we are really creating equivalence classes of equivalence classes. - */ - - for ( i = 1; i <= numecs; ++i ) - { /* initialize equivalence class list */ - duplist[i] = i - 1; - dupfwd[i] = i + 1; - } - - duplist[1] = NIL; - dupfwd[numecs] = NIL; - - for ( i = 1; i <= numstates; ++i ) - { - ns = ds[i]; - tch = transchar[ns]; - - if ( tch != SYM_EPSILON ) - { - if ( tch < -lastccl || tch >= csize ) - { - flexfatal( - _( "bad transition character detected in sympartition()" ) ); - } - - if ( tch >= 0 ) - { /* character transition */ - int ec = ecgroup[tch]; - - mkechar( ec, dupfwd, duplist ); - symlist[ec] = 1; - } - - else - { /* character class */ - tch = -tch; - - lenccl = ccllen[tch]; - cclp = cclmap[tch]; - mkeccl( ccltbl + cclp, lenccl, dupfwd, - duplist, numecs, NUL_ec ); - - if ( cclng[tch] ) - { - j = 0; - - for ( k = 0; k < lenccl; ++k ) - { - ich = ccltbl[cclp + k]; - - if ( ich == 0 ) - ich = NUL_ec; - - for ( ++j; j < ich; ++j ) - symlist[j] = 1; - } - - for ( ++j; j <= numecs; ++j ) - symlist[j] = 1; - } - - else - for ( k = 0; k < lenccl; ++k ) - { - ich = ccltbl[cclp + k]; - - if ( ich == 0 ) - ich = NUL_ec; - - symlist[ich] = 1; - } - } - } - } - } diff --git a/commands/flex-2.5.4/ecs.c b/commands/flex-2.5.4/ecs.c deleted file mode 100644 index cdbd86fa8..000000000 --- a/commands/flex-2.5.4/ecs.c +++ /dev/null @@ -1,225 +0,0 @@ -/* ecs - equivalence class routines */ - -/*- - * Copyright (c) 1990 The Regents of the University of California. - * All rights reserved. - * - * This code is derived from software contributed to Berkeley by - * Vern Paxson. - * - * The United States Government has rights in this work pursuant - * to contract no. DE-AC03-76SF00098 between the United States - * Department of Energy and the University of California. - * - * Redistribution and use in source and binary forms with or without - * modification are permitted provided that: (1) source distributions retain - * this entire copyright notice and comment, and (2) distributions including - * binaries display the following acknowledgement: ``This product includes - * software developed by the University of California, Berkeley and its - * contributors'' in the documentation or other materials provided with the - * distribution and in all advertising materials mentioning features or use - * of this software. Neither the name of the University nor the names of - * its contributors may be used to endorse or promote products derived from - * this software without specific prior written permission. - * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED - * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF - * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. - */ - -/* $Header$ */ - -#include "flexdef.h" - -/* ccl2ecl - convert character classes to set of equivalence classes */ - -void ccl2ecl() - { - int i, ich, newlen, cclp, ccls, cclmec; - - for ( i = 1; i <= lastccl; ++i ) - { - /* We loop through each character class, and for each character - * in the class, add the character's equivalence class to the - * new "character" class we are creating. Thus when we are all - * done, character classes will really consist of collections - * of equivalence classes - */ - - newlen = 0; - cclp = cclmap[i]; - - for ( ccls = 0; ccls < ccllen[i]; ++ccls ) - { - ich = ccltbl[cclp + ccls]; - cclmec = ecgroup[ich]; - - if ( cclmec > 0 ) - { - ccltbl[cclp + newlen] = cclmec; - ++newlen; - } - } - - ccllen[i] = newlen; - } - } - - -/* cre8ecs - associate equivalence class numbers with class members - * - * fwd is the forward linked-list of equivalence class members. bck - * is the backward linked-list, and num is the number of class members. - * - * Returned is the number of classes. - */ - -int cre8ecs( fwd, bck, num ) -int fwd[], bck[], num; - { - int i, j, numcl; - - numcl = 0; - - /* Create equivalence class numbers. From now on, ABS( bck(x) ) - * is the equivalence class number for object x. If bck(x) - * is positive, then x is the representative of its equivalence - * class. - */ - for ( i = 1; i <= num; ++i ) - if ( bck[i] == NIL ) - { - bck[i] = ++numcl; - for ( j = fwd[i]; j != NIL; j = fwd[j] ) - bck[j] = -numcl; - } - - return numcl; - } - - -/* mkeccl - update equivalence classes based on character class xtions - * - * synopsis - * Char ccls[]; - * int lenccl, fwd[llsiz], bck[llsiz], llsiz, NUL_mapping; - * void mkeccl( Char ccls[], int lenccl, int fwd[llsiz], int bck[llsiz], - * int llsiz, int NUL_mapping ); - * - * ccls contains the elements of the character class, lenccl is the - * number of elements in the ccl, fwd is the forward link-list of equivalent - * characters, bck is the backward link-list, and llsiz size of the link-list. - * - * NUL_mapping is the value which NUL (0) should be mapped to. - */ - -void mkeccl( ccls, lenccl, fwd, bck, llsiz, NUL_mapping ) -Char ccls[]; -int lenccl, fwd[], bck[], llsiz, NUL_mapping; - { - int cclp, oldec, newec; - int cclm, i, j; - static unsigned char cclflags[CSIZE]; /* initialized to all '\0' */ - - /* Note that it doesn't matter whether or not the character class is - * negated. The same results will be obtained in either case. - */ - - cclp = 0; - - while ( cclp < lenccl ) - { - cclm = ccls[cclp]; - - if ( NUL_mapping && cclm == 0 ) - cclm = NUL_mapping; - - oldec = bck[cclm]; - newec = cclm; - - j = cclp + 1; - - for ( i = fwd[cclm]; i != NIL && i <= llsiz; i = fwd[i] ) - { /* look for the symbol in the character class */ - for ( ; j < lenccl; ++j ) - { - register int ccl_char; - - if ( NUL_mapping && ccls[j] == 0 ) - ccl_char = NUL_mapping; - else - ccl_char = ccls[j]; - - if ( ccl_char > i ) - break; - - if ( ccl_char == i && ! cclflags[j] ) - { - /* We found an old companion of cclm - * in the ccl. Link it into the new - * equivalence class and flag it as - * having been processed. - */ - - bck[i] = newec; - fwd[newec] = i; - newec = i; - /* Set flag so we don't reprocess. */ - cclflags[j] = 1; - - /* Get next equivalence class member. */ - /* continue 2 */ - goto next_pt; - } - } - - /* Symbol isn't in character class. Put it in the old - * equivalence class. - */ - - bck[i] = oldec; - - if ( oldec != NIL ) - fwd[oldec] = i; - - oldec = i; - - next_pt: ; - } - - if ( bck[cclm] != NIL || oldec != bck[cclm] ) - { - bck[cclm] = NIL; - fwd[oldec] = NIL; - } - - fwd[newec] = NIL; - - /* Find next ccl member to process. */ - - for ( ++cclp; cclflags[cclp] && cclp < lenccl; ++cclp ) - { - /* Reset "doesn't need processing" flag. */ - cclflags[cclp] = 0; - } - } - } - - -/* mkechar - create equivalence class for single character */ - -void mkechar( tch, fwd, bck ) -int tch, fwd[], bck[]; - { - /* If until now the character has been a proper subset of - * an equivalence class, break it away to create a new ec - */ - - if ( fwd[tch] != NIL ) - bck[fwd[tch]] = bck[tch]; - - if ( bck[tch] != NIL ) - fwd[bck[tch]] = fwd[tch]; - - fwd[tch] = NIL; - bck[tch] = NIL; - } diff --git a/commands/flex-2.5.4/flex.1 b/commands/flex-2.5.4/flex.1 deleted file mode 100644 index f79a3ef40..000000000 --- a/commands/flex-2.5.4/flex.1 +++ /dev/null @@ -1,4060 +0,0 @@ -.TH FLEX 1 "April 1995" "Version 2.5" -.SH NAME -flex \- fast lexical analyzer generator -.SH SYNOPSIS -.B flex -.B [\-bcdfhilnpstvwBFILTV78+? \-C[aefFmr] \-ooutput \-Pprefix \-Sskeleton] -.B [\-\-help \-\-version] -.I [filename ...] -.SH OVERVIEW -This manual describes -.I flex, -a tool for generating programs that perform pattern-matching on text. The -manual includes both tutorial and reference sections: -.nf - - Description - a brief overview of the tool - - Some Simple Examples - - Format Of The Input File - - Patterns - the extended regular expressions used by flex - - How The Input Is Matched - the rules for determining what has been matched - - Actions - how to specify what to do when a pattern is matched - - The Generated Scanner - details regarding the scanner that flex produces; - how to control the input source - - Start Conditions - introducing context into your scanners, and - managing "mini-scanners" - - Multiple Input Buffers - how to manipulate multiple input sources; how to - scan from strings instead of files - - End-of-file Rules - special rules for matching the end of the input - - Miscellaneous Macros - a summary of macros available to the actions - - Values Available To The User - a summary of values available to the actions - - Interfacing With Yacc - connecting flex scanners together with yacc parsers - - Options - flex command-line options, and the "%option" - directive - - Performance Considerations - how to make your scanner go as fast as possible - - Generating C++ Scanners - the (experimental) facility for generating C++ - scanner classes - - Incompatibilities With Lex And POSIX - how flex differs from AT&T lex and the POSIX lex - standard - - Diagnostics - those error messages produced by flex (or scanners - it generates) whose meanings might not be apparent - - Files - files used by flex - - Deficiencies / Bugs - known problems with flex - - See Also - other documentation, related tools - - Author - includes contact information - -.fi -.SH DESCRIPTION -.I flex -is a tool for generating -.I scanners: -programs which recognized lexical patterns in text. -.I flex -reads -the given input files, or its standard input if no file names are given, -for a description of a scanner to generate. The description is in -the form of pairs -of regular expressions and C code, called -.I rules. flex -generates as output a C source file, -.B lex.yy.c, -which defines a routine -.B yylex(). -This file is compiled and linked with the -.B \-lfl -library to produce an executable. When the executable is run, -it analyzes its input for occurrences -of the regular expressions. Whenever it finds one, it executes -the corresponding C code. -.SH SOME SIMPLE EXAMPLES -.PP -First some simple examples to get the flavor of how one uses -.I flex. -The following -.I flex -input specifies a scanner which whenever it encounters the string -"username" will replace it with the user's login name: -.nf - - %% - username printf( "%s", getlogin() ); - -.fi -By default, any text not matched by a -.I flex -scanner -is copied to the output, so the net effect of this scanner is -to copy its input file to its output with each occurrence -of "username" expanded. -In this input, there is just one rule. "username" is the -.I pattern -and the "printf" is the -.I action. -The "%%" marks the beginning of the rules. -.PP -Here's another simple example: -.nf - - int num_lines = 0, num_chars = 0; - - %% - \\n ++num_lines; ++num_chars; - . ++num_chars; - - %% - main() - { - yylex(); - printf( "# of lines = %d, # of chars = %d\\n", - num_lines, num_chars ); - } - -.fi -This scanner counts the number of characters and the number -of lines in its input (it produces no output other than the -final report on the counts). The first line -declares two globals, "num_lines" and "num_chars", which are accessible -both inside -.B yylex() -and in the -.B main() -routine declared after the second "%%". There are two rules, one -which matches a newline ("\\n") and increments both the line count and -the character count, and one which matches any character other than -a newline (indicated by the "." regular expression). -.PP -A somewhat more complicated example: -.nf - - /* scanner for a toy Pascal-like language */ - - %{ - /* need this for the call to atof() below */ - #include - %} - - DIGIT [0-9] - ID [a-z][a-z0-9]* - - %% - - {DIGIT}+ { - printf( "An integer: %s (%d)\\n", yytext, - atoi( yytext ) ); - } - - {DIGIT}+"."{DIGIT}* { - printf( "A float: %s (%g)\\n", yytext, - atof( yytext ) ); - } - - if|then|begin|end|procedure|function { - printf( "A keyword: %s\\n", yytext ); - } - - {ID} printf( "An identifier: %s\\n", yytext ); - - "+"|"-"|"*"|"/" printf( "An operator: %s\\n", yytext ); - - "{"[^}\\n]*"}" /* eat up one-line comments */ - - [ \\t\\n]+ /* eat up whitespace */ - - . printf( "Unrecognized character: %s\\n", yytext ); - - %% - - main( argc, argv ) - int argc; - char **argv; - { - ++argv, --argc; /* skip over program name */ - if ( argc > 0 ) - yyin = fopen( argv[0], "r" ); - else - yyin = stdin; - - yylex(); - } - -.fi -This is the beginnings of a simple scanner for a language like -Pascal. It identifies different types of -.I tokens -and reports on what it has seen. -.PP -The details of this example will be explained in the following -sections. -.SH FORMAT OF THE INPUT FILE -The -.I flex -input file consists of three sections, separated by a line with just -.B %% -in it: -.nf - - definitions - %% - rules - %% - user code - -.fi -The -.I definitions -section contains declarations of simple -.I name -definitions to simplify the scanner specification, and declarations of -.I start conditions, -which are explained in a later section. -.PP -Name definitions have the form: -.nf - - name definition - -.fi -The "name" is a word beginning with a letter or an underscore ('_') -followed by zero or more letters, digits, '_', or '-' (dash). -The definition is taken to begin at the first non-white-space character -following the name and continuing to the end of the line. -The definition can subsequently be referred to using "{name}", which -will expand to "(definition)". For example, -.nf - - DIGIT [0-9] - ID [a-z][a-z0-9]* - -.fi -defines "DIGIT" to be a regular expression which matches a -single digit, and -"ID" to be a regular expression which matches a letter -followed by zero-or-more letters-or-digits. -A subsequent reference to -.nf - - {DIGIT}+"."{DIGIT}* - -.fi -is identical to -.nf - - ([0-9])+"."([0-9])* - -.fi -and matches one-or-more digits followed by a '.' followed -by zero-or-more digits. -.PP -The -.I rules -section of the -.I flex -input contains a series of rules of the form: -.nf - - pattern action - -.fi -where the pattern must be unindented and the action must begin -on the same line. -.PP -See below for a further description of patterns and actions. -.PP -Finally, the user code section is simply copied to -.B lex.yy.c -verbatim. -It is used for companion routines which call or are called -by the scanner. The presence of this section is optional; -if it is missing, the second -.B %% -in the input file may be skipped, too. -.PP -In the definitions and rules sections, any -.I indented -text or text enclosed in -.B %{ -and -.B %} -is copied verbatim to the output (with the %{}'s removed). -The %{}'s must appear unindented on lines by themselves. -.PP -In the rules section, -any indented or %{} text appearing before the -first rule may be used to declare variables -which are local to the scanning routine and (after the declarations) -code which is to be executed whenever the scanning routine is entered. -Other indented or %{} text in the rule section is still copied to the output, -but its meaning is not well-defined and it may well cause compile-time -errors (this feature is present for -.I POSIX -compliance; see below for other such features). -.PP -In the definitions section (but not in the rules section), -an unindented comment (i.e., a line -beginning with "/*") is also copied verbatim to the output up -to the next "*/". -.SH PATTERNS -The patterns in the input are written using an extended set of regular -expressions. These are: -.nf - - x match the character 'x' - . any character (byte) except newline - [xyz] a "character class"; in this case, the pattern - matches either an 'x', a 'y', or a 'z' - [abj-oZ] a "character class" with a range in it; matches - an 'a', a 'b', any letter from 'j' through 'o', - or a 'Z' - [^A-Z] a "negated character class", i.e., any character - but those in the class. In this case, any - character EXCEPT an uppercase letter. - [^A-Z\\n] any character EXCEPT an uppercase letter or - a newline - r* zero or more r's, where r is any regular expression - r+ one or more r's - r? zero or one r's (that is, "an optional r") - r{2,5} anywhere from two to five r's - r{2,} two or more r's - r{4} exactly 4 r's - {name} the expansion of the "name" definition - (see above) - "[xyz]\\"foo" - the literal string: [xyz]"foo - \\X if X is an 'a', 'b', 'f', 'n', 'r', 't', or 'v', - then the ANSI-C interpretation of \\x. - Otherwise, a literal 'X' (used to escape - operators such as '*') - \\0 a NUL character (ASCII code 0) - \\123 the character with octal value 123 - \\x2a the character with hexadecimal value 2a - (r) match an r; parentheses are used to override - precedence (see below) - - - rs the regular expression r followed by the - regular expression s; called "concatenation" - - - r|s either an r or an s - - - r/s an r but only if it is followed by an s. The - text matched by s is included when determining - whether this rule is the "longest match", - but is then returned to the input before - the action is executed. So the action only - sees the text matched by r. This type - of pattern is called trailing context". - (There are some combinations of r/s that flex - cannot match correctly; see notes in the - Deficiencies / Bugs section below regarding - "dangerous trailing context".) - ^r an r, but only at the beginning of a line (i.e., - which just starting to scan, or right after a - newline has been scanned). - r$ an r, but only at the end of a line (i.e., just - before a newline). Equivalent to "r/\\n". - - Note that flex's notion of "newline" is exactly - whatever the C compiler used to compile flex - interprets '\\n' as; in particular, on some DOS - systems you must either filter out \\r's in the - input yourself, or explicitly use r/\\r\\n for "r$". - - - r an r, but only in start condition s (see - below for discussion of start conditions) - r - same, but in any of start conditions s1, - s2, or s3 - <*>r an r in any start condition, even an exclusive one. - - - <> an end-of-file - <> - an end-of-file when in start condition s1 or s2 - -.fi -Note that inside of a character class, all regular expression operators -lose their special meaning except escape ('\\') and the character class -operators, '-', ']', and, at the beginning of the class, '^'. -.PP -The regular expressions listed above are grouped according to -precedence, from highest precedence at the top to lowest at the bottom. -Those grouped together have equal precedence. For example, -.nf - - foo|bar* - -.fi -is the same as -.nf - - (foo)|(ba(r*)) - -.fi -since the '*' operator has higher precedence than concatenation, -and concatenation higher than alternation ('|'). This pattern -therefore matches -.I either -the string "foo" -.I or -the string "ba" followed by zero-or-more r's. -To match "foo" or zero-or-more "bar"'s, use: -.nf - - foo|(bar)* - -.fi -and to match zero-or-more "foo"'s-or-"bar"'s: -.nf - - (foo|bar)* - -.fi -.PP -In addition to characters and ranges of characters, character classes -can also contain character class -.I expressions. -These are expressions enclosed inside -.B [: -and -.B :] -delimiters (which themselves must appear between the '[' and ']' of the -character class; other elements may occur inside the character class, too). -The valid expressions are: -.nf - - [:alnum:] [:alpha:] [:blank:] - [:cntrl:] [:digit:] [:graph:] - [:lower:] [:print:] [:punct:] - [:space:] [:upper:] [:xdigit:] - -.fi -These expressions all designate a set of characters equivalent to -the corresponding standard C -.B isXXX -function. For example, -.B [:alnum:] -designates those characters for which -.B isalnum() -returns true - i.e., any alphabetic or numeric. -Some systems don't provide -.B isblank(), -so flex defines -.B [:blank:] -as a blank or a tab. -.PP -For example, the following character classes are all equivalent: -.nf - - [[:alnum:]] - [[:alpha:][:digit:] - [[:alpha:]0-9] - [a-zA-Z0-9] - -.fi -If your scanner is case-insensitive (the -.B \-i -flag), then -.B [:upper:] -and -.B [:lower:] -are equivalent to -.B [:alpha:]. -.PP -Some notes on patterns: -.IP - -A negated character class such as the example "[^A-Z]" -above -.I will match a newline -unless "\\n" (or an equivalent escape sequence) is one of the -characters explicitly present in the negated character class -(e.g., "[^A-Z\\n]"). This is unlike how many other regular -expression tools treat negated character classes, but unfortunately -the inconsistency is historically entrenched. -Matching newlines means that a pattern like [^"]* can match the entire -input unless there's another quote in the input. -.IP - -A rule can have at most one instance of trailing context (the '/' operator -or the '$' operator). The start condition, '^', and "<>" patterns -can only occur at the beginning of a pattern, and, as well as with '/' and '$', -cannot be grouped inside parentheses. A '^' which does not occur at -the beginning of a rule or a '$' which does not occur at the end of -a rule loses its special properties and is treated as a normal character. -.IP -The following are illegal: -.nf - - foo/bar$ - foobar - -.fi -Note that the first of these, can be written "foo/bar\\n". -.IP -The following will result in '$' or '^' being treated as a normal character: -.nf - - foo|(bar$) - foo|^bar - -.fi -If what's wanted is a "foo" or a bar-followed-by-a-newline, the following -could be used (the special '|' action is explained below): -.nf - - foo | - bar$ /* action goes here */ - -.fi -A similar trick will work for matching a foo or a -bar-at-the-beginning-of-a-line. -.SH HOW THE INPUT IS MATCHED -When the generated scanner is run, it analyzes its input looking -for strings which match any of its patterns. If it finds more than -one match, it takes the one matching the most text (for trailing -context rules, this includes the length of the trailing part, even -though it will then be returned to the input). If it finds two -or more matches of the same length, the -rule listed first in the -.I flex -input file is chosen. -.PP -Once the match is determined, the text corresponding to the match -(called the -.I token) -is made available in the global character pointer -.B yytext, -and its length in the global integer -.B yyleng. -The -.I action -corresponding to the matched pattern is then executed (a more -detailed description of actions follows), and then the remaining -input is scanned for another match. -.PP -If no match is found, then the -.I default rule -is executed: the next character in the input is considered matched and -copied to the standard output. Thus, the simplest legal -.I flex -input is: -.nf - - %% - -.fi -which generates a scanner that simply copies its input (one character -at a time) to its output. -.PP -Note that -.B yytext -can be defined in two different ways: either as a character -.I pointer -or as a character -.I array. -You can control which definition -.I flex -uses by including one of the special directives -.B %pointer -or -.B %array -in the first (definitions) section of your flex input. The default is -.B %pointer, -unless you use the -.B -l -lex compatibility option, in which case -.B yytext -will be an array. -The advantage of using -.B %pointer -is substantially faster scanning and no buffer overflow when matching -very large tokens (unless you run out of dynamic memory). The disadvantage -is that you are restricted in how your actions can modify -.B yytext -(see the next section), and calls to the -.B unput() -function destroys the present contents of -.B yytext, -which can be a considerable porting headache when moving between different -.I lex -versions. -.PP -The advantage of -.B %array -is that you can then modify -.B yytext -to your heart's content, and calls to -.B unput() -do not destroy -.B yytext -(see below). Furthermore, existing -.I lex -programs sometimes access -.B yytext -externally using declarations of the form: -.nf - extern char yytext[]; -.fi -This definition is erroneous when used with -.B %pointer, -but correct for -.B %array. -.PP -.B %array -defines -.B yytext -to be an array of -.B YYLMAX -characters, which defaults to a fairly large value. You can change -the size by simply #define'ing -.B YYLMAX -to a different value in the first section of your -.I flex -input. As mentioned above, with -.B %pointer -yytext grows dynamically to accommodate large tokens. While this means your -.B %pointer -scanner can accommodate very large tokens (such as matching entire blocks -of comments), bear in mind that each time the scanner must resize -.B yytext -it also must rescan the entire token from the beginning, so matching such -tokens can prove slow. -.B yytext -presently does -.I not -dynamically grow if a call to -.B unput() -results in too much text being pushed back; instead, a run-time error results. -.PP -Also note that you cannot use -.B %array -with C++ scanner classes -(the -.B c++ -option; see below). -.SH ACTIONS -Each pattern in a rule has a corresponding action, which can be any -arbitrary C statement. The pattern ends at the first non-escaped -whitespace character; the remainder of the line is its action. If the -action is empty, then when the pattern is matched the input token -is simply discarded. For example, here is the specification for a program -which deletes all occurrences of "zap me" from its input: -.nf - - %% - "zap me" - -.fi -(It will copy all other characters in the input to the output since -they will be matched by the default rule.) -.PP -Here is a program which compresses multiple blanks and tabs down to -a single blank, and throws away whitespace found at the end of a line: -.nf - - %% - [ \\t]+ putchar( ' ' ); - [ \\t]+$ /* ignore this token */ - -.fi -.PP -If the action contains a '{', then the action spans till the balancing '}' -is found, and the action may cross multiple lines. -.I flex -knows about C strings and comments and won't be fooled by braces found -within them, but also allows actions to begin with -.B %{ -and will consider the action to be all the text up to the next -.B %} -(regardless of ordinary braces inside the action). -.PP -An action consisting solely of a vertical bar ('|') means "same as -the action for the next rule." See below for an illustration. -.PP -Actions can include arbitrary C code, including -.B return -statements to return a value to whatever routine called -.B yylex(). -Each time -.B yylex() -is called it continues processing tokens from where it last left -off until it either reaches -the end of the file or executes a return. -.PP -Actions are free to modify -.B yytext -except for lengthening it (adding -characters to its end--these will overwrite later characters in the -input stream). This however does not apply when using -.B %array -(see above); in that case, -.B yytext -may be freely modified in any way. -.PP -Actions are free to modify -.B yyleng -except they should not do so if the action also includes use of -.B yymore() -(see below). -.PP -There are a number of special directives which can be included within -an action: -.IP - -.B ECHO -copies yytext to the scanner's output. -.IP - -.B BEGIN -followed by the name of a start condition places the scanner in the -corresponding start condition (see below). -.IP - -.B REJECT -directs the scanner to proceed on to the "second best" rule which matched the -input (or a prefix of the input). The rule is chosen as described -above in "How the Input is Matched", and -.B yytext -and -.B yyleng -set up appropriately. -It may either be one which matched as much text -as the originally chosen rule but came later in the -.I flex -input file, or one which matched less text. -For example, the following will both count the -words in the input and call the routine special() whenever "frob" is seen: -.nf - - int word_count = 0; - %% - - frob special(); REJECT; - [^ \\t\\n]+ ++word_count; - -.fi -Without the -.B REJECT, -any "frob"'s in the input would not be counted as words, since the -scanner normally executes only one action per token. -Multiple -.B REJECT's -are allowed, each one finding the next best choice to the currently -active rule. For example, when the following scanner scans the token -"abcd", it will write "abcdabcaba" to the output: -.nf - - %% - a | - ab | - abc | - abcd ECHO; REJECT; - .|\\n /* eat up any unmatched character */ - -.fi -(The first three rules share the fourth's action since they use -the special '|' action.) -.B REJECT -is a particularly expensive feature in terms of scanner performance; -if it is used in -.I any -of the scanner's actions it will slow down -.I all -of the scanner's matching. Furthermore, -.B REJECT -cannot be used with the -.I -Cf -or -.I -CF -options (see below). -.IP -Note also that unlike the other special actions, -.B REJECT -is a -.I branch; -code immediately following it in the action will -.I not -be executed. -.IP - -.B yymore() -tells the scanner that the next time it matches a rule, the corresponding -token should be -.I appended -onto the current value of -.B yytext -rather than replacing it. For example, given the input "mega-kludge" -the following will write "mega-mega-kludge" to the output: -.nf - - %% - mega- ECHO; yymore(); - kludge ECHO; - -.fi -First "mega-" is matched and echoed to the output. Then "kludge" -is matched, but the previous "mega-" is still hanging around at the -beginning of -.B yytext -so the -.B ECHO -for the "kludge" rule will actually write "mega-kludge". -.PP -Two notes regarding use of -.B yymore(). -First, -.B yymore() -depends on the value of -.I yyleng -correctly reflecting the size of the current token, so you must not -modify -.I yyleng -if you are using -.B yymore(). -Second, the presence of -.B yymore() -in the scanner's action entails a minor performance penalty in the -scanner's matching speed. -.IP - -.B yyless(n) -returns all but the first -.I n -characters of the current token back to the input stream, where they -will be rescanned when the scanner looks for the next match. -.B yytext -and -.B yyleng -are adjusted appropriately (e.g., -.B yyleng -will now be equal to -.I n -). For example, on the input "foobar" the following will write out -"foobarbar": -.nf - - %% - foobar ECHO; yyless(3); - [a-z]+ ECHO; - -.fi -An argument of 0 to -.B yyless -will cause the entire current input string to be scanned again. Unless you've -changed how the scanner will subsequently process its input (using -.B BEGIN, -for example), this will result in an endless loop. -.PP -Note that -.B yyless -is a macro and can only be used in the flex input file, not from -other source files. -.IP - -.B unput(c) -puts the character -.I c -back onto the input stream. It will be the next character scanned. -The following action will take the current token and cause it -to be rescanned enclosed in parentheses. -.nf - - { - int i; - /* Copy yytext because unput() trashes yytext */ - char *yycopy = strdup( yytext ); - unput( ')' ); - for ( i = yyleng - 1; i >= 0; --i ) - unput( yycopy[i] ); - unput( '(' ); - free( yycopy ); - } - -.fi -Note that since each -.B unput() -puts the given character back at the -.I beginning -of the input stream, pushing back strings must be done back-to-front. -.PP -An important potential problem when using -.B unput() -is that if you are using -.B %pointer -(the default), a call to -.B unput() -.I destroys -the contents of -.I yytext, -starting with its rightmost character and devouring one character to -the left with each call. If you need the value of yytext preserved -after a call to -.B unput() -(as in the above example), -you must either first copy it elsewhere, or build your scanner using -.B %array -instead (see How The Input Is Matched). -.PP -Finally, note that you cannot put back -.B EOF -to attempt to mark the input stream with an end-of-file. -.IP - -.B input() -reads the next character from the input stream. For example, -the following is one way to eat up C comments: -.nf - - %% - "/*" { - register int c; - - for ( ; ; ) - { - while ( (c = input()) != '*' && - c != EOF ) - ; /* eat up text of comment */ - - if ( c == '*' ) - { - while ( (c = input()) == '*' ) - ; - if ( c == '/' ) - break; /* found the end */ - } - - if ( c == EOF ) - { - error( "EOF in comment" ); - break; - } - } - } - -.fi -(Note that if the scanner is compiled using -.B C++, -then -.B input() -is instead referred to as -.B yyinput(), -in order to avoid a name clash with the -.B C++ -stream by the name of -.I input.) -.IP - -.B YY_FLUSH_BUFFER -flushes the scanner's internal buffer -so that the next time the scanner attempts to match a token, it will -first refill the buffer using -.B YY_INPUT -(see The Generated Scanner, below). This action is a special case -of the more general -.B yy_flush_buffer() -function, described below in the section Multiple Input Buffers. -.IP - -.B yyterminate() -can be used in lieu of a return statement in an action. It terminates -the scanner and returns a 0 to the scanner's caller, indicating "all done". -By default, -.B yyterminate() -is also called when an end-of-file is encountered. It is a macro and -may be redefined. -.SH THE GENERATED SCANNER -The output of -.I flex -is the file -.B lex.yy.c, -which contains the scanning routine -.B yylex(), -a number of tables used by it for matching tokens, and a number -of auxiliary routines and macros. By default, -.B yylex() -is declared as follows: -.nf - - int yylex() - { - ... various definitions and the actions in here ... - } - -.fi -(If your environment supports function prototypes, then it will -be "int yylex( void )".) This definition may be changed by defining -the "YY_DECL" macro. For example, you could use: -.nf - - #define YY_DECL float lexscan( a, b ) float a, b; - -.fi -to give the scanning routine the name -.I lexscan, -returning a float, and taking two floats as arguments. Note that -if you give arguments to the scanning routine using a -K&R-style/non-prototyped function declaration, you must terminate -the definition with a semi-colon (;). -.PP -Whenever -.B yylex() -is called, it scans tokens from the global input file -.I yyin -(which defaults to stdin). It continues until it either reaches -an end-of-file (at which point it returns the value 0) or -one of its actions executes a -.I return -statement. -.PP -If the scanner reaches an end-of-file, subsequent calls are undefined -unless either -.I yyin -is pointed at a new input file (in which case scanning continues from -that file), or -.B yyrestart() -is called. -.B yyrestart() -takes one argument, a -.B FILE * -pointer (which can be nil, if you've set up -.B YY_INPUT -to scan from a source other than -.I yyin), -and initializes -.I yyin -for scanning from that file. Essentially there is no difference between -just assigning -.I yyin -to a new input file or using -.B yyrestart() -to do so; the latter is available for compatibility with previous versions -of -.I flex, -and because it can be used to switch input files in the middle of scanning. -It can also be used to throw away the current input buffer, by calling -it with an argument of -.I yyin; -but better is to use -.B YY_FLUSH_BUFFER -(see above). -Note that -.B yyrestart() -does -.I not -reset the start condition to -.B INITIAL -(see Start Conditions, below). -.PP -If -.B yylex() -stops scanning due to executing a -.I return -statement in one of the actions, the scanner may then be called again and it -will resume scanning where it left off. -.PP -By default (and for purposes of efficiency), the scanner uses -block-reads rather than simple -.I getc() -calls to read characters from -.I yyin. -The nature of how it gets its input can be controlled by defining the -.B YY_INPUT -macro. -YY_INPUT's calling sequence is "YY_INPUT(buf,result,max_size)". Its -action is to place up to -.I max_size -characters in the character array -.I buf -and return in the integer variable -.I result -either the -number of characters read or the constant YY_NULL (0 on Unix systems) -to indicate EOF. The default YY_INPUT reads from the -global file-pointer "yyin". -.PP -A sample definition of YY_INPUT (in the definitions -section of the input file): -.nf - - %{ - #define YY_INPUT(buf,result,max_size) \\ - { \\ - int c = getchar(); \\ - result = (c == EOF) ? YY_NULL : (buf[0] = c, 1); \\ - } - %} - -.fi -This definition will change the input processing to occur -one character at a time. -.PP -When the scanner receives an end-of-file indication from YY_INPUT, -it then checks the -.B yywrap() -function. If -.B yywrap() -returns false (zero), then it is assumed that the -function has gone ahead and set up -.I yyin -to point to another input file, and scanning continues. If it returns -true (non-zero), then the scanner terminates, returning 0 to its -caller. Note that in either case, the start condition remains unchanged; -it does -.I not -revert to -.B INITIAL. -.PP -If you do not supply your own version of -.B yywrap(), -then you must either use -.B %option noyywrap -(in which case the scanner behaves as though -.B yywrap() -returned 1), or you must link with -.B \-lfl -to obtain the default version of the routine, which always returns 1. -.PP -Three routines are available for scanning from in-memory buffers rather -than files: -.B yy_scan_string(), yy_scan_bytes(), -and -.B yy_scan_buffer(). -See the discussion of them below in the section Multiple Input Buffers. -.PP -The scanner writes its -.B ECHO -output to the -.I yyout -global (default, stdout), which may be redefined by the user simply -by assigning it to some other -.B FILE -pointer. -.SH START CONDITIONS -.I flex -provides a mechanism for conditionally activating rules. Any rule -whose pattern is prefixed with "" will only be active when -the scanner is in the start condition named "sc". For example, -.nf - - [^"]* { /* eat up the string body ... */ - ... - } - -.fi -will be active only when the scanner is in the "STRING" start -condition, and -.nf - - \\. { /* handle an escape ... */ - ... - } - -.fi -will be active only when the current start condition is -either "INITIAL", "STRING", or "QUOTE". -.PP -Start conditions -are declared in the definitions (first) section of the input -using unindented lines beginning with either -.B %s -or -.B %x -followed by a list of names. -The former declares -.I inclusive -start conditions, the latter -.I exclusive -start conditions. A start condition is activated using the -.B BEGIN -action. Until the next -.B BEGIN -action is executed, rules with the given start -condition will be active and -rules with other start conditions will be inactive. -If the start condition is -.I inclusive, -then rules with no start conditions at all will also be active. -If it is -.I exclusive, -then -.I only -rules qualified with the start condition will be active. -A set of rules contingent on the same exclusive start condition -describe a scanner which is independent of any of the other rules in the -.I flex -input. Because of this, -exclusive start conditions make it easy to specify "mini-scanners" -which scan portions of the input that are syntactically different -from the rest (e.g., comments). -.PP -If the distinction between inclusive and exclusive start conditions -is still a little vague, here's a simple example illustrating the -connection between the two. The set of rules: -.nf - - %s example - %% - - foo do_something(); - - bar something_else(); - -.fi -is equivalent to -.nf - - %x example - %% - - foo do_something(); - - bar something_else(); - -.fi -Without the -.B -qualifier, the -.I bar -pattern in the second example wouldn't be active (i.e., couldn't match) -when in start condition -.B example. -If we just used -.B -to qualify -.I bar, -though, then it would only be active in -.B example -and not in -.B INITIAL, -while in the first example it's active in both, because in the first -example the -.B example -startion condition is an -.I inclusive -.B (%s) -start condition. -.PP -Also note that the special start-condition specifier -.B <*> -matches every start condition. Thus, the above example could also -have been written; -.nf - - %x example - %% - - foo do_something(); - - <*>bar something_else(); - -.fi -.PP -The default rule (to -.B ECHO -any unmatched character) remains active in start conditions. It -is equivalent to: -.nf - - <*>.|\\n ECHO; - -.fi -.PP -.B BEGIN(0) -returns to the original state where only the rules with -no start conditions are active. This state can also be -referred to as the start-condition "INITIAL", so -.B BEGIN(INITIAL) -is equivalent to -.B BEGIN(0). -(The parentheses around the start condition name are not required but -are considered good style.) -.PP -.B BEGIN -actions can also be given as indented code at the beginning -of the rules section. For example, the following will cause -the scanner to enter the "SPECIAL" start condition whenever -.B yylex() -is called and the global variable -.I enter_special -is true: -.nf - - int enter_special; - - %x SPECIAL - %% - if ( enter_special ) - BEGIN(SPECIAL); - - blahblahblah - ...more rules follow... - -.fi -.PP -To illustrate the uses of start conditions, -here is a scanner which provides two different interpretations -of a string like "123.456". By default it will treat it as -three tokens, the integer "123", a dot ('.'), and the integer "456". -But if the string is preceded earlier in the line by the string -"expect-floats" -it will treat it as a single token, the floating-point number -123.456: -.nf - - %{ - #include - %} - %s expect - - %% - expect-floats BEGIN(expect); - - [0-9]+"."[0-9]+ { - printf( "found a float, = %f\\n", - atof( yytext ) ); - } - \\n { - /* that's the end of the line, so - * we need another "expect-number" - * before we'll recognize any more - * numbers - */ - BEGIN(INITIAL); - } - - [0-9]+ { - printf( "found an integer, = %d\\n", - atoi( yytext ) ); - } - - "." printf( "found a dot\\n" ); - -.fi -Here is a scanner which recognizes (and discards) C comments while -maintaining a count of the current input line. -.nf - - %x comment - %% - int line_num = 1; - - "/*" BEGIN(comment); - - [^*\\n]* /* eat anything that's not a '*' */ - "*"+[^*/\\n]* /* eat up '*'s not followed by '/'s */ - \\n ++line_num; - "*"+"/" BEGIN(INITIAL); - -.fi -This scanner goes to a bit of trouble to match as much -text as possible with each rule. In general, when attempting to write -a high-speed scanner try to match as much possible in each rule, as -it's a big win. -.PP -Note that start-conditions names are really integer values and -can be stored as such. Thus, the above could be extended in the -following fashion: -.nf - - %x comment foo - %% - int line_num = 1; - int comment_caller; - - "/*" { - comment_caller = INITIAL; - BEGIN(comment); - } - - ... - - "/*" { - comment_caller = foo; - BEGIN(comment); - } - - [^*\\n]* /* eat anything that's not a '*' */ - "*"+[^*/\\n]* /* eat up '*'s not followed by '/'s */ - \\n ++line_num; - "*"+"/" BEGIN(comment_caller); - -.fi -Furthermore, you can access the current start condition using -the integer-valued -.B YY_START -macro. For example, the above assignments to -.I comment_caller -could instead be written -.nf - - comment_caller = YY_START; - -.fi -Flex provides -.B YYSTATE -as an alias for -.B YY_START -(since that is what's used by AT&T -.I lex). -.PP -Note that start conditions do not have their own name-space; %s's and %x's -declare names in the same fashion as #define's. -.PP -Finally, here's an example of how to match C-style quoted strings using -exclusive start conditions, including expanded escape sequences (but -not including checking for a string that's too long): -.nf - - %x str - - %% - char string_buf[MAX_STR_CONST]; - char *string_buf_ptr; - - - \\" string_buf_ptr = string_buf; BEGIN(str); - - \\" { /* saw closing quote - all done */ - BEGIN(INITIAL); - *string_buf_ptr = '\\0'; - /* return string constant token type and - * value to parser - */ - } - - \\n { - /* error - unterminated string constant */ - /* generate error message */ - } - - \\\\[0-7]{1,3} { - /* octal escape sequence */ - int result; - - (void) sscanf( yytext + 1, "%o", &result ); - - if ( result > 0xff ) - /* error, constant is out-of-bounds */ - - *string_buf_ptr++ = result; - } - - \\\\[0-9]+ { - /* generate error - bad escape sequence; something - * like '\\48' or '\\0777777' - */ - } - - \\\\n *string_buf_ptr++ = '\\n'; - \\\\t *string_buf_ptr++ = '\\t'; - \\\\r *string_buf_ptr++ = '\\r'; - \\\\b *string_buf_ptr++ = '\\b'; - \\\\f *string_buf_ptr++ = '\\f'; - - \\\\(.|\\n) *string_buf_ptr++ = yytext[1]; - - [^\\\\\\n\\"]+ { - char *yptr = yytext; - - while ( *yptr ) - *string_buf_ptr++ = *yptr++; - } - -.fi -.PP -Often, such as in some of the examples above, you wind up writing a -whole bunch of rules all preceded by the same start condition(s). Flex -makes this a little easier and cleaner by introducing a notion of -start condition -.I scope. -A start condition scope is begun with: -.nf - - { - -.fi -where -.I SCs -is a list of one or more start conditions. Inside the start condition -scope, every rule automatically has the prefix -.I -applied to it, until a -.I '}' -which matches the initial -.I '{'. -So, for example, -.nf - - { - "\\\\n" return '\\n'; - "\\\\r" return '\\r'; - "\\\\f" return '\\f'; - "\\\\0" return '\\0'; - } - -.fi -is equivalent to: -.nf - - "\\\\n" return '\\n'; - "\\\\r" return '\\r'; - "\\\\f" return '\\f'; - "\\\\0" return '\\0'; - -.fi -Start condition scopes may be nested. -.PP -Three routines are available for manipulating stacks of start conditions: -.TP -.B void yy_push_state(int new_state) -pushes the current start condition onto the top of the start condition -stack and switches to -.I new_state -as though you had used -.B BEGIN new_state -(recall that start condition names are also integers). -.TP -.B void yy_pop_state() -pops the top of the stack and switches to it via -.B BEGIN. -.TP -.B int yy_top_state() -returns the top of the stack without altering the stack's contents. -.PP -The start condition stack grows dynamically and so has no built-in -size limitation. If memory is exhausted, program execution aborts. -.PP -To use start condition stacks, your scanner must include a -.B %option stack -directive (see Options below). -.SH MULTIPLE INPUT BUFFERS -Some scanners (such as those which support "include" files) -require reading from several input streams. As -.I flex -scanners do a large amount of buffering, one cannot control -where the next input will be read from by simply writing a -.B YY_INPUT -which is sensitive to the scanning context. -.B YY_INPUT -is only called when the scanner reaches the end of its buffer, which -may be a long time after scanning a statement such as an "include" -which requires switching the input source. -.PP -To negotiate these sorts of problems, -.I flex -provides a mechanism for creating and switching between multiple -input buffers. An input buffer is created by using: -.nf - - YY_BUFFER_STATE yy_create_buffer( FILE *file, int size ) - -.fi -which takes a -.I FILE -pointer and a size and creates a buffer associated with the given -file and large enough to hold -.I size -characters (when in doubt, use -.B YY_BUF_SIZE -for the size). It returns a -.B YY_BUFFER_STATE -handle, which may then be passed to other routines (see below). The -.B YY_BUFFER_STATE -type is a pointer to an opaque -.B struct yy_buffer_state -structure, so you may safely initialize YY_BUFFER_STATE variables to -.B ((YY_BUFFER_STATE) 0) -if you wish, and also refer to the opaque structure in order to -correctly declare input buffers in source files other than that -of your scanner. Note that the -.I FILE -pointer in the call to -.B yy_create_buffer -is only used as the value of -.I yyin -seen by -.B YY_INPUT; -if you redefine -.B YY_INPUT -so it no longer uses -.I yyin, -then you can safely pass a nil -.I FILE -pointer to -.B yy_create_buffer. -You select a particular buffer to scan from using: -.nf - - void yy_switch_to_buffer( YY_BUFFER_STATE new_buffer ) - -.fi -switches the scanner's input buffer so subsequent tokens will -come from -.I new_buffer. -Note that -.B yy_switch_to_buffer() -may be used by yywrap() to set things up for continued scanning, instead -of opening a new file and pointing -.I yyin -at it. Note also that switching input sources via either -.B yy_switch_to_buffer() -or -.B yywrap() -does -.I not -change the start condition. -.nf - - void yy_delete_buffer( YY_BUFFER_STATE buffer ) - -.fi -is used to reclaim the storage associated with a buffer. ( -.B buffer -can be nil, in which case the routine does nothing.) -You can also clear the current contents of a buffer using: -.nf - - void yy_flush_buffer( YY_BUFFER_STATE buffer ) - -.fi -This function discards the buffer's contents, -so the next time the scanner attempts to match a token from the -buffer, it will first fill the buffer anew using -.B YY_INPUT. -.PP -.B yy_new_buffer() -is an alias for -.B yy_create_buffer(), -provided for compatibility with the C++ use of -.I new -and -.I delete -for creating and destroying dynamic objects. -.PP -Finally, the -.B YY_CURRENT_BUFFER -macro returns a -.B YY_BUFFER_STATE -handle to the current buffer. -.PP -Here is an example of using these features for writing a scanner -which expands include files (the -.B <> -feature is discussed below): -.nf - - /* the "incl" state is used for picking up the name - * of an include file - */ - %x incl - - %{ - #define MAX_INCLUDE_DEPTH 10 - YY_BUFFER_STATE include_stack[MAX_INCLUDE_DEPTH]; - int include_stack_ptr = 0; - %} - - %% - include BEGIN(incl); - - [a-z]+ ECHO; - [^a-z\\n]*\\n? ECHO; - - [ \\t]* /* eat the whitespace */ - [^ \\t\\n]+ { /* got the include file name */ - if ( include_stack_ptr >= MAX_INCLUDE_DEPTH ) - { - fprintf( stderr, "Includes nested too deeply" ); - exit( 1 ); - } - - include_stack[include_stack_ptr++] = - YY_CURRENT_BUFFER; - - yyin = fopen( yytext, "r" ); - - if ( ! yyin ) - error( ... ); - - yy_switch_to_buffer( - yy_create_buffer( yyin, YY_BUF_SIZE ) ); - - BEGIN(INITIAL); - } - - <> { - if ( --include_stack_ptr < 0 ) - { - yyterminate(); - } - - else - { - yy_delete_buffer( YY_CURRENT_BUFFER ); - yy_switch_to_buffer( - include_stack[include_stack_ptr] ); - } - } - -.fi -Three routines are available for setting up input buffers for -scanning in-memory strings instead of files. All of them create -a new input buffer for scanning the string, and return a corresponding -.B YY_BUFFER_STATE -handle (which you should delete with -.B yy_delete_buffer() -when done with it). They also switch to the new buffer using -.B yy_switch_to_buffer(), -so the next call to -.B yylex() -will start scanning the string. -.TP -.B yy_scan_string(const char *str) -scans a NUL-terminated string. -.TP -.B yy_scan_bytes(const char *bytes, int len) -scans -.I len -bytes (including possibly NUL's) -starting at location -.I bytes. -.PP -Note that both of these functions create and scan a -.I copy -of the string or bytes. (This may be desirable, since -.B yylex() -modifies the contents of the buffer it is scanning.) You can avoid the -copy by using: -.TP -.B yy_scan_buffer(char *base, yy_size_t size) -which scans in place the buffer starting at -.I base, -consisting of -.I size -bytes, the last two bytes of which -.I must -be -.B YY_END_OF_BUFFER_CHAR -(ASCII NUL). -These last two bytes are not scanned; thus, scanning -consists of -.B base[0] -through -.B base[size-2], -inclusive. -.IP -If you fail to set up -.I base -in this manner (i.e., forget the final two -.B YY_END_OF_BUFFER_CHAR -bytes), then -.B yy_scan_buffer() -returns a nil pointer instead of creating a new input buffer. -.IP -The type -.B yy_size_t -is an integral type to which you can cast an integer expression -reflecting the size of the buffer. -.SH END-OF-FILE RULES -The special rule "<>" indicates -actions which are to be taken when an end-of-file is -encountered and yywrap() returns non-zero (i.e., indicates -no further files to process). The action must finish -by doing one of four things: -.IP - -assigning -.I yyin -to a new input file (in previous versions of flex, after doing the -assignment you had to call the special action -.B YY_NEW_FILE; -this is no longer necessary); -.IP - -executing a -.I return -statement; -.IP - -executing the special -.B yyterminate() -action; -.IP - -or, switching to a new buffer using -.B yy_switch_to_buffer() -as shown in the example above. -.PP -<> rules may not be used with other -patterns; they may only be qualified with a list of start -conditions. If an unqualified <> rule is given, it -applies to -.I all -start conditions which do not already have <> actions. To -specify an <> rule for only the initial start condition, use -.nf - - <> - -.fi -.PP -These rules are useful for catching things like unclosed comments. -An example: -.nf - - %x quote - %% - - ...other rules for dealing with quotes... - - <> { - error( "unterminated quote" ); - yyterminate(); - } - <> { - if ( *++filelist ) - yyin = fopen( *filelist, "r" ); - else - yyterminate(); - } - -.fi -.SH MISCELLANEOUS MACROS -The macro -.B YY_USER_ACTION -can be defined to provide an action -which is always executed prior to the matched rule's action. For example, -it could be #define'd to call a routine to convert yytext to lower-case. -When -.B YY_USER_ACTION -is invoked, the variable -.I yy_act -gives the number of the matched rule (rules are numbered starting with 1). -Suppose you want to profile how often each of your rules is matched. The -following would do the trick: -.nf - - #define YY_USER_ACTION ++ctr[yy_act] - -.fi -where -.I ctr -is an array to hold the counts for the different rules. Note that -the macro -.B YY_NUM_RULES -gives the total number of rules (including the default rule, even if -you use -.B \-s), -so a correct declaration for -.I ctr -is: -.nf - - int ctr[YY_NUM_RULES]; - -.fi -.PP -The macro -.B YY_USER_INIT -may be defined to provide an action which is always executed before -the first scan (and before the scanner's internal initializations are done). -For example, it could be used to call a routine to read -in a data table or open a logging file. -.PP -The macro -.B yy_set_interactive(is_interactive) -can be used to control whether the current buffer is considered -.I interactive. -An interactive buffer is processed more slowly, -but must be used when the scanner's input source is indeed -interactive to avoid problems due to waiting to fill buffers -(see the discussion of the -.B \-I -flag below). A non-zero value -in the macro invocation marks the buffer as interactive, a zero -value as non-interactive. Note that use of this macro overrides -.B %option always-interactive -or -.B %option never-interactive -(see Options below). -.B yy_set_interactive() -must be invoked prior to beginning to scan the buffer that is -(or is not) to be considered interactive. -.PP -The macro -.B yy_set_bol(at_bol) -can be used to control whether the current buffer's scanning -context for the next token match is done as though at the -beginning of a line. A non-zero macro argument makes rules anchored with -'^' active, while a zero argument makes '^' rules inactive. -.PP -The macro -.B YY_AT_BOL() -returns true if the next token scanned from the current buffer -will have '^' rules active, false otherwise. -.PP -In the generated scanner, the actions are all gathered in one large -switch statement and separated using -.B YY_BREAK, -which may be redefined. By default, it is simply a "break", to separate -each rule's action from the following rule's. -Redefining -.B YY_BREAK -allows, for example, C++ users to -#define YY_BREAK to do nothing (while being very careful that every -rule ends with a "break" or a "return"!) to avoid suffering from -unreachable statement warnings where because a rule's action ends with -"return", the -.B YY_BREAK -is inaccessible. -.SH VALUES AVAILABLE TO THE USER -This section summarizes the various values available to the user -in the rule actions. -.IP - -.B char *yytext -holds the text of the current token. It may be modified but not lengthened -(you cannot append characters to the end). -.IP -If the special directive -.B %array -appears in the first section of the scanner description, then -.B yytext -is instead declared -.B char yytext[YYLMAX], -where -.B YYLMAX -is a macro definition that you can redefine in the first section -if you don't like the default value (generally 8KB). Using -.B %array -results in somewhat slower scanners, but the value of -.B yytext -becomes immune to calls to -.I input() -and -.I unput(), -which potentially destroy its value when -.B yytext -is a character pointer. The opposite of -.B %array -is -.B %pointer, -which is the default. -.IP -You cannot use -.B %array -when generating C++ scanner classes -(the -.B \-+ -flag). -.IP - -.B int yyleng -holds the length of the current token. -.IP - -.B FILE *yyin -is the file which by default -.I flex -reads from. It may be redefined but doing so only makes sense before -scanning begins or after an EOF has been encountered. Changing it in -the midst of scanning will have unexpected results since -.I flex -buffers its input; use -.B yyrestart() -instead. -Once scanning terminates because an end-of-file -has been seen, you can assign -.I yyin -at the new input file and then call the scanner again to continue scanning. -.IP - -.B void yyrestart( FILE *new_file ) -may be called to point -.I yyin -at the new input file. The switch-over to the new file is immediate -(any previously buffered-up input is lost). Note that calling -.B yyrestart() -with -.I yyin -as an argument thus throws away the current input buffer and continues -scanning the same input file. -.IP - -.B FILE *yyout -is the file to which -.B ECHO -actions are done. It can be reassigned by the user. -.IP - -.B YY_CURRENT_BUFFER -returns a -.B YY_BUFFER_STATE -handle to the current buffer. -.IP - -.B YY_START -returns an integer value corresponding to the current start -condition. You can subsequently use this value with -.B BEGIN -to return to that start condition. -.SH INTERFACING WITH YACC -One of the main uses of -.I flex -is as a companion to the -.I yacc -parser-generator. -.I yacc -parsers expect to call a routine named -.B yylex() -to find the next input token. The routine is supposed to -return the type of the next token as well as putting any associated -value in the global -.B yylval. -To use -.I flex -with -.I yacc, -one specifies the -.B \-d -option to -.I yacc -to instruct it to generate the file -.B y.tab.h -containing definitions of all the -.B %tokens -appearing in the -.I yacc -input. This file is then included in the -.I flex -scanner. For example, if one of the tokens is "TOK_NUMBER", -part of the scanner might look like: -.nf - - %{ - #include "y.tab.h" - %} - - %% - - [0-9]+ yylval = atoi( yytext ); return TOK_NUMBER; - -.fi -.SH OPTIONS -.I flex -has the following options: -.TP -.B \-b -Generate backing-up information to -.I lex.backup. -This is a list of scanner states which require backing up -and the input characters on which they do so. By adding rules one -can remove backing-up states. If -.I all -backing-up states are eliminated and -.B \-Cf -or -.B \-CF -is used, the generated scanner will run faster (see the -.B \-p -flag). Only users who wish to squeeze every last cycle out of their -scanners need worry about this option. (See the section on Performance -Considerations below.) -.TP -.B \-c -is a do-nothing, deprecated option included for POSIX compliance. -.TP -.B \-d -makes the generated scanner run in -.I debug -mode. Whenever a pattern is recognized and the global -.B yy_flex_debug -is non-zero (which is the default), -the scanner will write to -.I stderr -a line of the form: -.nf - - --accepting rule at line 53 ("the matched text") - -.fi -The line number refers to the location of the rule in the file -defining the scanner (i.e., the file that was fed to flex). Messages -are also generated when the scanner backs up, accepts the -default rule, reaches the end of its input buffer (or encounters -a NUL; at this point, the two look the same as far as the scanner's concerned), -or reaches an end-of-file. -.TP -.B \-f -specifies -.I fast scanner. -No table compression is done and stdio is bypassed. -The result is large but fast. This option is equivalent to -.B \-Cfr -(see below). -.TP -.B \-h -generates a "help" summary of -.I flex's -options to -.I stdout -and then exits. -.B \-? -and -.B \-\-help -are synonyms for -.B \-h. -.TP -.B \-i -instructs -.I flex -to generate a -.I case-insensitive -scanner. The case of letters given in the -.I flex -input patterns will -be ignored, and tokens in the input will be matched regardless of case. The -matched text given in -.I yytext -will have the preserved case (i.e., it will not be folded). -.TP -.B \-l -turns on maximum compatibility with the original AT&T -.I lex -implementation. Note that this does not mean -.I full -compatibility. Use of this option costs a considerable amount of -performance, and it cannot be used with the -.B \-+, -f, -F, -Cf, -or -.B -CF -options. For details on the compatibilities it provides, see the section -"Incompatibilities With Lex And POSIX" below. This option also results -in the name -.B YY_FLEX_LEX_COMPAT -being #define'd in the generated scanner. -.TP -.B \-n -is another do-nothing, deprecated option included only for -POSIX compliance. -.TP -.B \-p -generates a performance report to stderr. The report -consists of comments regarding features of the -.I flex -input file which will cause a serious loss of performance in the resulting -scanner. If you give the flag twice, you will also get comments regarding -features that lead to minor performance losses. -.IP -Note that the use of -.B REJECT, -.B %option yylineno, -and variable trailing context (see the Deficiencies / Bugs section below) -entails a substantial performance penalty; use of -.I yymore(), -the -.B ^ -operator, -and the -.B \-I -flag entail minor performance penalties. -.TP -.B \-s -causes the -.I default rule -(that unmatched scanner input is echoed to -.I stdout) -to be suppressed. If the scanner encounters input that does not -match any of its rules, it aborts with an error. This option is -useful for finding holes in a scanner's rule set. -.TP -.B \-t -instructs -.I flex -to write the scanner it generates to standard output instead -of -.B lex.yy.c. -.TP -.B \-v -specifies that -.I flex -should write to -.I stderr -a summary of statistics regarding the scanner it generates. -Most of the statistics are meaningless to the casual -.I flex -user, but the first line identifies the version of -.I flex -(same as reported by -.B \-V), -and the next line the flags used when generating the scanner, including -those that are on by default. -.TP -.B \-w -suppresses warning messages. -.TP -.B \-B -instructs -.I flex -to generate a -.I batch -scanner, the opposite of -.I interactive -scanners generated by -.B \-I -(see below). In general, you use -.B \-B -when you are -.I certain -that your scanner will never be used interactively, and you want to -squeeze a -.I little -more performance out of it. If your goal is instead to squeeze out a -.I lot -more performance, you should be using the -.B \-Cf -or -.B \-CF -options (discussed below), which turn on -.B \-B -automatically anyway. -.TP -.B \-F -specifies that the -.ul -fast -scanner table representation should be used (and stdio -bypassed). This representation is -about as fast as the full table representation -.B (-f), -and for some sets of patterns will be considerably smaller (and for -others, larger). In general, if the pattern set contains both "keywords" -and a catch-all, "identifier" rule, such as in the set: -.nf - - "case" return TOK_CASE; - "switch" return TOK_SWITCH; - ... - "default" return TOK_DEFAULT; - [a-z]+ return TOK_ID; - -.fi -then you're better off using the full table representation. If only -the "identifier" rule is present and you then use a hash table or some such -to detect the keywords, you're better off using -.B -F. -.IP -This option is equivalent to -.B \-CFr -(see below). It cannot be used with -.B \-+. -.TP -.B \-I -instructs -.I flex -to generate an -.I interactive -scanner. An interactive scanner is one that only looks ahead to decide -what token has been matched if it absolutely must. It turns out that -always looking one extra character ahead, even if the scanner has already -seen enough text to disambiguate the current token, is a bit faster than -only looking ahead when necessary. But scanners that always look ahead -give dreadful interactive performance; for example, when a user types -a newline, it is not recognized as a newline token until they enter -.I another -token, which often means typing in another whole line. -.IP -.I Flex -scanners default to -.I interactive -unless you use the -.B \-Cf -or -.B \-CF -table-compression options (see below). That's because if you're looking -for high-performance you should be using one of these options, so if you -didn't, -.I flex -assumes you'd rather trade off a bit of run-time performance for intuitive -interactive behavior. Note also that you -.I cannot -use -.B \-I -in conjunction with -.B \-Cf -or -.B \-CF. -Thus, this option is not really needed; it is on by default for all those -cases in which it is allowed. -.IP -You can force a scanner to -.I not -be interactive by using -.B \-B -(see above). -.TP -.B \-L -instructs -.I flex -not to generate -.B #line -directives. Without this option, -.I flex -peppers the generated scanner -with #line directives so error messages in the actions will be correctly -located with respect to either the original -.I flex -input file (if the errors are due to code in the input file), or -.B lex.yy.c -(if the errors are -.I flex's -fault -- you should report these sorts of errors to the email address -given below). -.TP -.B \-T -makes -.I flex -run in -.I trace -mode. It will generate a lot of messages to -.I stderr -concerning -the form of the input and the resultant non-deterministic and deterministic -finite automata. This option is mostly for use in maintaining -.I flex. -.TP -.B \-V -prints the version number to -.I stdout -and exits. -.B \-\-version -is a synonym for -.B \-V. -.TP -.B \-7 -instructs -.I flex -to generate a 7-bit scanner, i.e., one which can only recognized 7-bit -characters in its input. The advantage of using -.B \-7 -is that the scanner's tables can be up to half the size of those generated -using the -.B \-8 -option (see below). The disadvantage is that such scanners often hang -or crash if their input contains an 8-bit character. -.IP -Note, however, that unless you generate your scanner using the -.B \-Cf -or -.B \-CF -table compression options, use of -.B \-7 -will save only a small amount of table space, and make your scanner -considerably less portable. -.I Flex's -default behavior is to generate an 8-bit scanner unless you use the -.B \-Cf -or -.B \-CF, -in which case -.I flex -defaults to generating 7-bit scanners unless your site was always -configured to generate 8-bit scanners (as will often be the case -with non-USA sites). You can tell whether flex generated a 7-bit -or an 8-bit scanner by inspecting the flag summary in the -.B \-v -output as described above. -.IP -Note that if you use -.B \-Cfe -or -.B \-CFe -(those table compression options, but also using equivalence classes as -discussed see below), flex still defaults to generating an 8-bit -scanner, since usually with these compression options full 8-bit tables -are not much more expensive than 7-bit tables. -.TP -.B \-8 -instructs -.I flex -to generate an 8-bit scanner, i.e., one which can recognize 8-bit -characters. This flag is only needed for scanners generated using -.B \-Cf -or -.B \-CF, -as otherwise flex defaults to generating an 8-bit scanner anyway. -.IP -See the discussion of -.B \-7 -above for flex's default behavior and the tradeoffs between 7-bit -and 8-bit scanners. -.TP -.B \-+ -specifies that you want flex to generate a C++ -scanner class. See the section on Generating C++ Scanners below for -details. -.TP -.B \-C[aefFmr] -controls the degree of table compression and, more generally, trade-offs -between small scanners and fast scanners. -.IP -.B \-Ca -("align") instructs flex to trade off larger tables in the -generated scanner for faster performance because the elements of -the tables are better aligned for memory access and computation. On some -RISC architectures, fetching and manipulating longwords is more efficient -than with smaller-sized units such as shortwords. This option can -double the size of the tables used by your scanner. -.IP -.B \-Ce -directs -.I flex -to construct -.I equivalence classes, -i.e., sets of characters -which have identical lexical properties (for example, if the only -appearance of digits in the -.I flex -input is in the character class -"[0-9]" then the digits '0', '1', ..., '9' will all be put -in the same equivalence class). Equivalence classes usually give -dramatic reductions in the final table/object file sizes (typically -a factor of 2-5) and are pretty cheap performance-wise (one array -look-up per character scanned). -.IP -.B \-Cf -specifies that the -.I full -scanner tables should be generated - -.I flex -should not compress the -tables by taking advantages of similar transition functions for -different states. -.IP -.B \-CF -specifies that the alternate fast scanner representation (described -above under the -.B \-F -flag) -should be used. This option cannot be used with -.B \-+. -.IP -.B \-Cm -directs -.I flex -to construct -.I meta-equivalence classes, -which are sets of equivalence classes (or characters, if equivalence -classes are not being used) that are commonly used together. Meta-equivalence -classes are often a big win when using compressed tables, but they -have a moderate performance impact (one or two "if" tests and one -array look-up per character scanned). -.IP -.B \-Cr -causes the generated scanner to -.I bypass -use of the standard I/O library (stdio) for input. Instead of calling -.B fread() -or -.B getc(), -the scanner will use the -.B read() -system call, resulting in a performance gain which varies from system -to system, but in general is probably negligible unless you are also using -.B \-Cf -or -.B \-CF. -Using -.B \-Cr -can cause strange behavior if, for example, you read from -.I yyin -using stdio prior to calling the scanner (because the scanner will miss -whatever text your previous reads left in the stdio input buffer). -.IP -.B \-Cr -has no effect if you define -.B YY_INPUT -(see The Generated Scanner above). -.IP -A lone -.B \-C -specifies that the scanner tables should be compressed but neither -equivalence classes nor meta-equivalence classes should be used. -.IP -The options -.B \-Cf -or -.B \-CF -and -.B \-Cm -do not make sense together - there is no opportunity for meta-equivalence -classes if the table is not being compressed. Otherwise the options -may be freely mixed, and are cumulative. -.IP -The default setting is -.B \-Cem, -which specifies that -.I flex -should generate equivalence classes -and meta-equivalence classes. This setting provides the highest -degree of table compression. You can trade off -faster-executing scanners at the cost of larger tables with -the following generally being true: -.nf - - slowest & smallest - -Cem - -Cm - -Ce - -C - -C{f,F}e - -C{f,F} - -C{f,F}a - fastest & largest - -.fi -Note that scanners with the smallest tables are usually generated and -compiled the quickest, so -during development you will usually want to use the default, maximal -compression. -.IP -.B \-Cfe -is often a good compromise between speed and size for production -scanners. -.TP -.B \-ooutput -directs flex to write the scanner to the file -.B output -instead of -.B lex.yy.c. -If you combine -.B \-o -with the -.B \-t -option, then the scanner is written to -.I stdout -but its -.B #line -directives (see the -.B \\-L -option above) refer to the file -.B output. -.TP -.B \-Pprefix -changes the default -.I "yy" -prefix used by -.I flex -for all globally-visible variable and function names to instead be -.I prefix. -For example, -.B \-Pfoo -changes the name of -.B yytext -to -.B footext. -It also changes the name of the default output file from -.B lex.yy.c -to -.B lex.foo.c. -Here are all of the names affected: -.nf - - yy_create_buffer - yy_delete_buffer - yy_flex_debug - yy_init_buffer - yy_flush_buffer - yy_load_buffer_state - yy_switch_to_buffer - yyin - yyleng - yylex - yylineno - yyout - yyrestart - yytext - yywrap - -.fi -(If you are using a C++ scanner, then only -.B yywrap -and -.B yyFlexLexer -are affected.) -Within your scanner itself, you can still refer to the global variables -and functions using either version of their name; but externally, they -have the modified name. -.IP -This option lets you easily link together multiple -.I flex -programs into the same executable. Note, though, that using this -option also renames -.B yywrap(), -so you now -.I must -either -provide your own (appropriately-named) version of the routine for your -scanner, or use -.B %option noyywrap, -as linking with -.B \-lfl -no longer provides one for you by default. -.TP -.B \-Sskeleton_file -overrides the default skeleton file from which -.I flex -constructs its scanners. You'll never need this option unless you are doing -.I flex -maintenance or development. -.PP -.I flex -also provides a mechanism for controlling options within the -scanner specification itself, rather than from the flex command-line. -This is done by including -.B %option -directives in the first section of the scanner specification. -You can specify multiple options with a single -.B %option -directive, and multiple directives in the first section of your flex input -file. -.PP -Most options are given simply as names, optionally preceded by the -word "no" (with no intervening whitespace) to negate their meaning. -A number are equivalent to flex flags or their negation: -.nf - - 7bit -7 option - 8bit -8 option - align -Ca option - backup -b option - batch -B option - c++ -+ option - - caseful or - case-sensitive opposite of -i (default) - - case-insensitive or - caseless -i option - - debug -d option - default opposite of -s option - ecs -Ce option - fast -F option - full -f option - interactive -I option - lex-compat -l option - meta-ecs -Cm option - perf-report -p option - read -Cr option - stdout -t option - verbose -v option - warn opposite of -w option - (use "%option nowarn" for -w) - - array equivalent to "%array" - pointer equivalent to "%pointer" (default) - -.fi -Some -.B %option's -provide features otherwise not available: -.TP -.B always-interactive -instructs flex to generate a scanner which always considers its input -"interactive". Normally, on each new input file the scanner calls -.B isatty() -in an attempt to determine whether -the scanner's input source is interactive and thus should be read a -character at a time. When this option is used, however, then no -such call is made. -.TP -.B main -directs flex to provide a default -.B main() -program for the scanner, which simply calls -.B yylex(). -This option implies -.B noyywrap -(see below). -.TP -.B never-interactive -instructs flex to generate a scanner which never considers its input -"interactive" (again, no call made to -.B isatty()). -This is the opposite of -.B always-interactive. -.TP -.B stack -enables the use of start condition stacks (see Start Conditions above). -.TP -.B stdinit -if set (i.e., -.B %option stdinit) -initializes -.I yyin -and -.I yyout -to -.I stdin -and -.I stdout, -instead of the default of -.I nil. -Some existing -.I lex -programs depend on this behavior, even though it is not compliant with -ANSI C, which does not require -.I stdin -and -.I stdout -to be compile-time constant. -.TP -.B yylineno -directs -.I flex -to generate a scanner that maintains the number of the current line -read from its input in the global variable -.B yylineno. -This option is implied by -.B %option lex-compat. -.TP -.B yywrap -if unset (i.e., -.B %option noyywrap), -makes the scanner not call -.B yywrap() -upon an end-of-file, but simply assume that there are no more -files to scan (until the user points -.I yyin -at a new file and calls -.B yylex() -again). -.PP -.I flex -scans your rule actions to determine whether you use the -.B REJECT -or -.B yymore() -features. The -.B reject -and -.B yymore -options are available to override its decision as to whether you use the -options, either by setting them (e.g., -.B %option reject) -to indicate the feature is indeed used, or -unsetting them to indicate it actually is not used -(e.g., -.B %option noyymore). -.PP -Three options take string-delimited values, offset with '=': -.nf - - %option outfile="ABC" - -.fi -is equivalent to -.B -oABC, -and -.nf - - %option prefix="XYZ" - -.fi -is equivalent to -.B -PXYZ. -Finally, -.nf - - %option yyclass="foo" - -.fi -only applies when generating a C++ scanner ( -.B \-+ -option). It informs -.I flex -that you have derived -.B foo -as a subclass of -.B yyFlexLexer, -so -.I flex -will place your actions in the member function -.B foo::yylex() -instead of -.B yyFlexLexer::yylex(). -It also generates a -.B yyFlexLexer::yylex() -member function that emits a run-time error (by invoking -.B yyFlexLexer::LexerError()) -if called. -See Generating C++ Scanners, below, for additional information. -.PP -A number of options are available for lint purists who want to suppress -the appearance of unneeded routines in the generated scanner. Each of the -following, if unset -(e.g., -.B %option nounput -), results in the corresponding routine not appearing in -the generated scanner: -.nf - - input, unput - yy_push_state, yy_pop_state, yy_top_state - yy_scan_buffer, yy_scan_bytes, yy_scan_string - -.fi -(though -.B yy_push_state() -and friends won't appear anyway unless you use -.B %option stack). -.SH PERFORMANCE CONSIDERATIONS -The main design goal of -.I flex -is that it generate high-performance scanners. It has been optimized -for dealing well with large sets of rules. Aside from the effects on -scanner speed of the table compression -.B \-C -options outlined above, -there are a number of options/actions which degrade performance. These -are, from most expensive to least: -.nf - - REJECT - %option yylineno - arbitrary trailing context - - pattern sets that require backing up - %array - %option interactive - %option always-interactive - - '^' beginning-of-line operator - yymore() - -.fi -with the first three all being quite expensive and the last two -being quite cheap. Note also that -.B unput() -is implemented as a routine call that potentially does quite a bit of -work, while -.B yyless() -is a quite-cheap macro; so if just putting back some excess text you -scanned, use -.B yyless(). -.PP -.B REJECT -should be avoided at all costs when performance is important. -It is a particularly expensive option. -.PP -Getting rid of backing up is messy and often may be an enormous -amount of work for a complicated scanner. In principal, one begins -by using the -.B \-b -flag to generate a -.I lex.backup -file. For example, on the input -.nf - - %% - foo return TOK_KEYWORD; - foobar return TOK_KEYWORD; - -.fi -the file looks like: -.nf - - State #6 is non-accepting - - associated rule line numbers: - 2 3 - out-transitions: [ o ] - jam-transitions: EOF [ \\001-n p-\\177 ] - - State #8 is non-accepting - - associated rule line numbers: - 3 - out-transitions: [ a ] - jam-transitions: EOF [ \\001-` b-\\177 ] - - State #9 is non-accepting - - associated rule line numbers: - 3 - out-transitions: [ r ] - jam-transitions: EOF [ \\001-q s-\\177 ] - - Compressed tables always back up. - -.fi -The first few lines tell us that there's a scanner state in -which it can make a transition on an 'o' but not on any other -character, and that in that state the currently scanned text does not match -any rule. The state occurs when trying to match the rules found -at lines 2 and 3 in the input file. -If the scanner is in that state and then reads -something other than an 'o', it will have to back up to find -a rule which is matched. With -a bit of headscratching one can see that this must be the -state it's in when it has seen "fo". When this has happened, -if anything other than another 'o' is seen, the scanner will -have to back up to simply match the 'f' (by the default rule). -.PP -The comment regarding State #8 indicates there's a problem -when "foob" has been scanned. Indeed, on any character other -than an 'a', the scanner will have to back up to accept "foo". -Similarly, the comment for State #9 concerns when "fooba" has -been scanned and an 'r' does not follow. -.PP -The final comment reminds us that there's no point going to -all the trouble of removing backing up from the rules unless -we're using -.B \-Cf -or -.B \-CF, -since there's no performance gain doing so with compressed scanners. -.PP -The way to remove the backing up is to add "error" rules: -.nf - - %% - foo return TOK_KEYWORD; - foobar return TOK_KEYWORD; - - fooba | - foob | - fo { - /* false alarm, not really a keyword */ - return TOK_ID; - } - -.fi -.PP -Eliminating backing up among a list of keywords can also be -done using a "catch-all" rule: -.nf - - %% - foo return TOK_KEYWORD; - foobar return TOK_KEYWORD; - - [a-z]+ return TOK_ID; - -.fi -This is usually the best solution when appropriate. -.PP -Backing up messages tend to cascade. -With a complicated set of rules it's not uncommon to get hundreds -of messages. If one can decipher them, though, it often -only takes a dozen or so rules to eliminate the backing up (though -it's easy to make a mistake and have an error rule accidentally match -a valid token. A possible future -.I flex -feature will be to automatically add rules to eliminate backing up). -.PP -It's important to keep in mind that you gain the benefits of eliminating -backing up only if you eliminate -.I every -instance of backing up. Leaving just one means you gain nothing. -.PP -.I Variable -trailing context (where both the leading and trailing parts do not have -a fixed length) entails almost the same performance loss as -.B REJECT -(i.e., substantial). So when possible a rule like: -.nf - - %% - mouse|rat/(cat|dog) run(); - -.fi -is better written: -.nf - - %% - mouse/cat|dog run(); - rat/cat|dog run(); - -.fi -or as -.nf - - %% - mouse|rat/cat run(); - mouse|rat/dog run(); - -.fi -Note that here the special '|' action does -.I not -provide any savings, and can even make things worse (see -Deficiencies / Bugs below). -.LP -Another area where the user can increase a scanner's performance -(and one that's easier to implement) arises from the fact that -the longer the tokens matched, the faster the scanner will run. -This is because with long tokens the processing of most input -characters takes place in the (short) inner scanning loop, and -does not often have to go through the additional work of setting up -the scanning environment (e.g., -.B yytext) -for the action. Recall the scanner for C comments: -.nf - - %x comment - %% - int line_num = 1; - - "/*" BEGIN(comment); - - [^*\\n]* - "*"+[^*/\\n]* - \\n ++line_num; - "*"+"/" BEGIN(INITIAL); - -.fi -This could be sped up by writing it as: -.nf - - %x comment - %% - int line_num = 1; - - "/*" BEGIN(comment); - - [^*\\n]* - [^*\\n]*\\n ++line_num; - "*"+[^*/\\n]* - "*"+[^*/\\n]*\\n ++line_num; - "*"+"/" BEGIN(INITIAL); - -.fi -Now instead of each newline requiring the processing of another -action, recognizing the newlines is "distributed" over the other rules -to keep the matched text as long as possible. Note that -.I adding -rules does -.I not -slow down the scanner! The speed of the scanner is independent -of the number of rules or (modulo the considerations given at the -beginning of this section) how complicated the rules are with -regard to operators such as '*' and '|'. -.PP -A final example in speeding up a scanner: suppose you want to scan -through a file containing identifiers and keywords, one per line -and with no other extraneous characters, and recognize all the -keywords. A natural first approach is: -.nf - - %% - asm | - auto | - break | - ... etc ... - volatile | - while /* it's a keyword */ - - .|\\n /* it's not a keyword */ - -.fi -To eliminate the back-tracking, introduce a catch-all rule: -.nf - - %% - asm | - auto | - break | - ... etc ... - volatile | - while /* it's a keyword */ - - [a-z]+ | - .|\\n /* it's not a keyword */ - -.fi -Now, if it's guaranteed that there's exactly one word per line, -then we can reduce the total number of matches by a half by -merging in the recognition of newlines with that of the other -tokens: -.nf - - %% - asm\\n | - auto\\n | - break\\n | - ... etc ... - volatile\\n | - while\\n /* it's a keyword */ - - [a-z]+\\n | - .|\\n /* it's not a keyword */ - -.fi -One has to be careful here, as we have now reintroduced backing up -into the scanner. In particular, while -.I we -know that there will never be any characters in the input stream -other than letters or newlines, -.I flex -can't figure this out, and it will plan for possibly needing to back up -when it has scanned a token like "auto" and then the next character -is something other than a newline or a letter. Previously it would -then just match the "auto" rule and be done, but now it has no "auto" -rule, only a "auto\\n" rule. To eliminate the possibility of backing up, -we could either duplicate all rules but without final newlines, or, -since we never expect to encounter such an input and therefore don't -how it's classified, we can introduce one more catch-all rule, this -one which doesn't include a newline: -.nf - - %% - asm\\n | - auto\\n | - break\\n | - ... etc ... - volatile\\n | - while\\n /* it's a keyword */ - - [a-z]+\\n | - [a-z]+ | - .|\\n /* it's not a keyword */ - -.fi -Compiled with -.B \-Cf, -this is about as fast as one can get a -.I flex -scanner to go for this particular problem. -.PP -A final note: -.I flex -is slow when matching NUL's, particularly when a token contains -multiple NUL's. -It's best to write rules which match -.I short -amounts of text if it's anticipated that the text will often include NUL's. -.PP -Another final note regarding performance: as mentioned above in the section -How the Input is Matched, dynamically resizing -.B yytext -to accommodate huge tokens is a slow process because it presently requires that -the (huge) token be rescanned from the beginning. Thus if performance is -vital, you should attempt to match "large" quantities of text but not -"huge" quantities, where the cutoff between the two is at about 8K -characters/token. -.SH GENERATING C++ SCANNERS -.I flex -provides two different ways to generate scanners for use with C++. The -first way is to simply compile a scanner generated by -.I flex -using a C++ compiler instead of a C compiler. You should not encounter -any compilations errors (please report any you find to the email address -given in the Author section below). You can then use C++ code in your -rule actions instead of C code. Note that the default input source for -your scanner remains -.I yyin, -and default echoing is still done to -.I yyout. -Both of these remain -.I FILE * -variables and not C++ -.I streams. -.PP -You can also use -.I flex -to generate a C++ scanner class, using the -.B \-+ -option (or, equivalently, -.B %option c++), -which is automatically specified if the name of the flex -executable ends in a '+', such as -.I flex++. -When using this option, flex defaults to generating the scanner to the file -.B lex.yy.cc -instead of -.B lex.yy.c. -The generated scanner includes the header file -.I FlexLexer.h, -which defines the interface to two C++ classes. -.PP -The first class, -.B FlexLexer, -provides an abstract base class defining the general scanner class -interface. It provides the following member functions: -.TP -.B const char* YYText() -returns the text of the most recently matched token, the equivalent of -.B yytext. -.TP -.B int YYLeng() -returns the length of the most recently matched token, the equivalent of -.B yyleng. -.TP -.B int lineno() const -returns the current input line number -(see -.B %option yylineno), -or -.B 1 -if -.B %option yylineno -was not used. -.TP -.B void set_debug( int flag ) -sets the debugging flag for the scanner, equivalent to assigning to -.B yy_flex_debug -(see the Options section above). Note that you must build the scanner -using -.B %option debug -to include debugging information in it. -.TP -.B int debug() const -returns the current setting of the debugging flag. -.PP -Also provided are member functions equivalent to -.B yy_switch_to_buffer(), -.B yy_create_buffer() -(though the first argument is an -.B istream* -object pointer and not a -.B FILE*), -.B yy_flush_buffer(), -.B yy_delete_buffer(), -and -.B yyrestart() -(again, the first argument is a -.B istream* -object pointer). -.PP -The second class defined in -.I FlexLexer.h -is -.B yyFlexLexer, -which is derived from -.B FlexLexer. -It defines the following additional member functions: -.TP -.B -yyFlexLexer( istream* arg_yyin = 0, ostream* arg_yyout = 0 ) -constructs a -.B yyFlexLexer -object using the given streams for input and output. If not specified, -the streams default to -.B cin -and -.B cout, -respectively. -.TP -.B virtual int yylex() -performs the same role is -.B yylex() -does for ordinary flex scanners: it scans the input stream, consuming -tokens, until a rule's action returns a value. If you derive a subclass -.B S -from -.B yyFlexLexer -and want to access the member functions and variables of -.B S -inside -.B yylex(), -then you need to use -.B %option yyclass="S" -to inform -.I flex -that you will be using that subclass instead of -.B yyFlexLexer. -In this case, rather than generating -.B yyFlexLexer::yylex(), -.I flex -generates -.B S::yylex() -(and also generates a dummy -.B yyFlexLexer::yylex() -that calls -.B yyFlexLexer::LexerError() -if called). -.TP -.B -virtual void switch_streams(istream* new_in = 0, -.B -ostream* new_out = 0) -reassigns -.B yyin -to -.B new_in -(if non-nil) -and -.B yyout -to -.B new_out -(ditto), deleting the previous input buffer if -.B yyin -is reassigned. -.TP -.B -int yylex( istream* new_in, ostream* new_out = 0 ) -first switches the input streams via -.B switch_streams( new_in, new_out ) -and then returns the value of -.B yylex(). -.PP -In addition, -.B yyFlexLexer -defines the following protected virtual functions which you can redefine -in derived classes to tailor the scanner: -.TP -.B -virtual int LexerInput( char* buf, int max_size ) -reads up to -.B max_size -characters into -.B buf -and returns the number of characters read. To indicate end-of-input, -return 0 characters. Note that "interactive" scanners (see the -.B \-B -and -.B \-I -flags) define the macro -.B YY_INTERACTIVE. -If you redefine -.B LexerInput() -and need to take different actions depending on whether or not -the scanner might be scanning an interactive input source, you can -test for the presence of this name via -.B #ifdef. -.TP -.B -virtual void LexerOutput( const char* buf, int size ) -writes out -.B size -characters from the buffer -.B buf, -which, while NUL-terminated, may also contain "internal" NUL's if -the scanner's rules can match text with NUL's in them. -.TP -.B -virtual void LexerError( const char* msg ) -reports a fatal error message. The default version of this function -writes the message to the stream -.B cerr -and exits. -.PP -Note that a -.B yyFlexLexer -object contains its -.I entire -scanning state. Thus you can use such objects to create reentrant -scanners. You can instantiate multiple instances of the same -.B yyFlexLexer -class, and you can also combine multiple C++ scanner classes together -in the same program using the -.B \-P -option discussed above. -.PP -Finally, note that the -.B %array -feature is not available to C++ scanner classes; you must use -.B %pointer -(the default). -.PP -Here is an example of a simple C++ scanner: -.nf - - // An example of using the flex C++ scanner class. - - %{ - int mylineno = 0; - %} - - string \\"[^\\n"]+\\" - - ws [ \\t]+ - - alpha [A-Za-z] - dig [0-9] - name ({alpha}|{dig}|\\$)({alpha}|{dig}|[_.\\-/$])* - num1 [-+]?{dig}+\\.?([eE][-+]?{dig}+)? - num2 [-+]?{dig}*\\.{dig}+([eE][-+]?{dig}+)? - number {num1}|{num2} - - %% - - {ws} /* skip blanks and tabs */ - - "/*" { - int c; - - while((c = yyinput()) != 0) - { - if(c == '\\n') - ++mylineno; - - else if(c == '*') - { - if((c = yyinput()) == '/') - break; - else - unput(c); - } - } - } - - {number} cout << "number " << YYText() << '\\n'; - - \\n mylineno++; - - {name} cout << "name " << YYText() << '\\n'; - - {string} cout << "string " << YYText() << '\\n'; - - %% - - int main( int /* argc */, char** /* argv */ ) - { - FlexLexer* lexer = new yyFlexLexer; - while(lexer->yylex() != 0) - ; - return 0; - } -.fi -If you want to create multiple (different) lexer classes, you use the -.B \-P -flag (or the -.B prefix= -option) to rename each -.B yyFlexLexer -to some other -.B xxFlexLexer. -You then can include -.B -in your other sources once per lexer class, first renaming -.B yyFlexLexer -as follows: -.nf - - #undef yyFlexLexer - #define yyFlexLexer xxFlexLexer - #include - - #undef yyFlexLexer - #define yyFlexLexer zzFlexLexer - #include - -.fi -if, for example, you used -.B %option prefix="xx" -for one of your scanners and -.B %option prefix="zz" -for the other. -.PP -IMPORTANT: the present form of the scanning class is -.I experimental -and may change considerably between major releases. -.SH INCOMPATIBILITIES WITH LEX AND POSIX -.I flex -is a rewrite of the AT&T Unix -.I lex -tool (the two implementations do not share any code, though), -with some extensions and incompatibilities, both of which -are of concern to those who wish to write scanners acceptable -to either implementation. Flex is fully compliant with the POSIX -.I lex -specification, except that when using -.B %pointer -(the default), a call to -.B unput() -destroys the contents of -.B yytext, -which is counter to the POSIX specification. -.PP -In this section we discuss all of the known areas of incompatibility -between flex, AT&T lex, and the POSIX specification. -.PP -.I flex's -.B \-l -option turns on maximum compatibility with the original AT&T -.I lex -implementation, at the cost of a major loss in the generated scanner's -performance. We note below which incompatibilities can be overcome -using the -.B \-l -option. -.PP -.I flex -is fully compatible with -.I lex -with the following exceptions: -.IP - -The undocumented -.I lex -scanner internal variable -.B yylineno -is not supported unless -.B \-l -or -.B %option yylineno -is used. -.IP -.B yylineno -should be maintained on a per-buffer basis, rather than a per-scanner -(single global variable) basis. -.IP -.B yylineno -is not part of the POSIX specification. -.IP - -The -.B input() -routine is not redefinable, though it may be called to read characters -following whatever has been matched by a rule. If -.B input() -encounters an end-of-file the normal -.B yywrap() -processing is done. A ``real'' end-of-file is returned by -.B input() -as -.I EOF. -.IP -Input is instead controlled by defining the -.B YY_INPUT -macro. -.IP -The -.I flex -restriction that -.B input() -cannot be redefined is in accordance with the POSIX specification, -which simply does not specify any way of controlling the -scanner's input other than by making an initial assignment to -.I yyin. -.IP - -The -.B unput() -routine is not redefinable. This restriction is in accordance with POSIX. -.IP - -.I flex -scanners are not as reentrant as -.I lex -scanners. In particular, if you have an interactive scanner and -an interrupt handler which long-jumps out of the scanner, and -the scanner is subsequently called again, you may get the following -message: -.nf - - fatal flex scanner internal error--end of buffer missed - -.fi -To reenter the scanner, first use -.nf - - yyrestart( yyin ); - -.fi -Note that this call will throw away any buffered input; usually this -isn't a problem with an interactive scanner. -.IP -Also note that flex C++ scanner classes -.I are -reentrant, so if using C++ is an option for you, you should use -them instead. See "Generating C++ Scanners" above for details. -.IP - -.B output() -is not supported. -Output from the -.B ECHO -macro is done to the file-pointer -.I yyout -(default -.I stdout). -.IP -.B output() -is not part of the POSIX specification. -.IP - -.I lex -does not support exclusive start conditions (%x), though they -are in the POSIX specification. -.IP - -When definitions are expanded, -.I flex -encloses them in parentheses. -With lex, the following: -.nf - - NAME [A-Z][A-Z0-9]* - %% - foo{NAME}? printf( "Found it\\n" ); - %% - -.fi -will not match the string "foo" because when the macro -is expanded the rule is equivalent to "foo[A-Z][A-Z0-9]*?" -and the precedence is such that the '?' is associated with -"[A-Z0-9]*". With -.I flex, -the rule will be expanded to -"foo([A-Z][A-Z0-9]*)?" and so the string "foo" will match. -.IP -Note that if the definition begins with -.B ^ -or ends with -.B $ -then it is -.I not -expanded with parentheses, to allow these operators to appear in -definitions without losing their special meanings. But the -.B , /, -and -.B <> -operators cannot be used in a -.I flex -definition. -.IP -Using -.B \-l -results in the -.I lex -behavior of no parentheses around the definition. -.IP -The POSIX specification is that the definition be enclosed in parentheses. -.IP - -Some implementations of -.I lex -allow a rule's action to begin on a separate line, if the rule's pattern -has trailing whitespace: -.nf - - %% - foo|bar - { foobar_action(); } - -.fi -.I flex -does not support this feature. -.IP - -The -.I lex -.B %r -(generate a Ratfor scanner) option is not supported. It is not part -of the POSIX specification. -.IP - -After a call to -.B unput(), -.I yytext -is undefined until the next token is matched, unless the scanner -was built using -.B %array. -This is not the case with -.I lex -or the POSIX specification. The -.B \-l -option does away with this incompatibility. -.IP - -The precedence of the -.B {} -(numeric range) operator is different. -.I lex -interprets "abc{1,3}" as "match one, two, or -three occurrences of 'abc'", whereas -.I flex -interprets it as "match 'ab' -followed by one, two, or three occurrences of 'c'". The latter is -in agreement with the POSIX specification. -.IP - -The precedence of the -.B ^ -operator is different. -.I lex -interprets "^foo|bar" as "match either 'foo' at the beginning of a line, -or 'bar' anywhere", whereas -.I flex -interprets it as "match either 'foo' or 'bar' if they come at the beginning -of a line". The latter is in agreement with the POSIX specification. -.IP - -The special table-size declarations such as -.B %a -supported by -.I lex -are not required by -.I flex -scanners; -.I flex -ignores them. -.IP - -The name -.bd -FLEX_SCANNER -is #define'd so scanners may be written for use with either -.I flex -or -.I lex. -Scanners also include -.B YY_FLEX_MAJOR_VERSION -and -.B YY_FLEX_MINOR_VERSION -indicating which version of -.I flex -generated the scanner -(for example, for the 2.5 release, these defines would be 2 and 5 -respectively). -.PP -The following -.I flex -features are not included in -.I lex -or the POSIX specification: -.nf - - C++ scanners - %option - start condition scopes - start condition stacks - interactive/non-interactive scanners - yy_scan_string() and friends - yyterminate() - yy_set_interactive() - yy_set_bol() - YY_AT_BOL() - <> - <*> - YY_DECL - YY_START - YY_USER_ACTION - YY_USER_INIT - #line directives - %{}'s around actions - multiple actions on a line - -.fi -plus almost all of the flex flags. -The last feature in the list refers to the fact that with -.I flex -you can put multiple actions on the same line, separated with -semi-colons, while with -.I lex, -the following -.nf - - foo handle_foo(); ++num_foos_seen; - -.fi -is (rather surprisingly) truncated to -.nf - - foo handle_foo(); - -.fi -.I flex -does not truncate the action. Actions that are not enclosed in -braces are simply terminated at the end of the line. -.SH DIAGNOSTICS -.PP -.I warning, rule cannot be matched -indicates that the given rule -cannot be matched because it follows other rules that will -always match the same text as it. For -example, in the following "foo" cannot be matched because it comes after -an identifier "catch-all" rule: -.nf - - [a-z]+ got_identifier(); - foo got_foo(); - -.fi -Using -.B REJECT -in a scanner suppresses this warning. -.PP -.I warning, -.B \-s -.I -option given but default rule can be matched -means that it is possible (perhaps only in a particular start condition) -that the default rule (match any single character) is the only one -that will match a particular input. Since -.B \-s -was given, presumably this is not intended. -.PP -.I reject_used_but_not_detected undefined -or -.I yymore_used_but_not_detected undefined - -These errors can occur at compile time. They indicate that the -scanner uses -.B REJECT -or -.B yymore() -but that -.I flex -failed to notice the fact, meaning that -.I flex -scanned the first two sections looking for occurrences of these actions -and failed to find any, but somehow you snuck some in (via a #include -file, for example). Use -.B %option reject -or -.B %option yymore -to indicate to flex that you really do use these features. -.PP -.I flex scanner jammed - -a scanner compiled with -.B \-s -has encountered an input string which wasn't matched by -any of its rules. This error can also occur due to internal problems. -.PP -.I token too large, exceeds YYLMAX - -your scanner uses -.B %array -and one of its rules matched a string longer than the -.B YYLMAX -constant (8K bytes by default). You can increase the value by -#define'ing -.B YYLMAX -in the definitions section of your -.I flex -input. -.PP -.I scanner requires \-8 flag to -.I use the character 'x' - -Your scanner specification includes recognizing the 8-bit character -.I 'x' -and you did not specify the \-8 flag, and your scanner defaulted to 7-bit -because you used the -.B \-Cf -or -.B \-CF -table compression options. See the discussion of the -.B \-7 -flag for details. -.PP -.I flex scanner push-back overflow - -you used -.B unput() -to push back so much text that the scanner's buffer could not hold -both the pushed-back text and the current token in -.B yytext. -Ideally the scanner should dynamically resize the buffer in this case, but at -present it does not. -.PP -.I -input buffer overflow, can't enlarge buffer because scanner uses REJECT - -the scanner was working on matching an extremely large token and needed -to expand the input buffer. This doesn't work with scanners that use -.B -REJECT. -.PP -.I -fatal flex scanner internal error--end of buffer missed - -This can occur in an scanner which is reentered after a long-jump -has jumped out (or over) the scanner's activation frame. Before -reentering the scanner, use: -.nf - - yyrestart( yyin ); - -.fi -or, as noted above, switch to using the C++ scanner class. -.PP -.I too many start conditions in <> construct! - -you listed more start conditions in a <> construct than exist (so -you must have listed at least one of them twice). -.SH FILES -.TP -.B \-lfl -library with which scanners must be linked. -.TP -.I lex.yy.c -generated scanner (called -.I lexyy.c -on some systems). -.TP -.I lex.yy.cc -generated C++ scanner class, when using -.B -+. -.TP -.I -header file defining the C++ scanner base class, -.B FlexLexer, -and its derived class, -.B yyFlexLexer. -.TP -.I flex.skl -skeleton scanner. This file is only used when building flex, not when -flex executes. -.TP -.I lex.backup -backing-up information for -.B \-b -flag (called -.I lex.bck -on some systems). -.SH DEFICIENCIES / BUGS -.PP -Some trailing context -patterns cannot be properly matched and generate -warning messages ("dangerous trailing context"). These are -patterns where the ending of the -first part of the rule matches the beginning of the second -part, such as "zx*/xy*", where the 'x*' matches the 'x' at -the beginning of the trailing context. (Note that the POSIX draft -states that the text matched by such patterns is undefined.) -.PP -For some trailing context rules, parts which are actually fixed-length are -not recognized as such, leading to the abovementioned performance loss. -In particular, parts using '|' or {n} (such as "foo{3}") are always -considered variable-length. -.PP -Combining trailing context with the special '|' action can result in -.I fixed -trailing context being turned into the more expensive -.I variable -trailing context. For example, in the following: -.nf - - %% - abc | - xyz/def - -.fi -.PP -Use of -.B unput() -invalidates yytext and yyleng, unless the -.B %array -directive -or the -.B \-l -option has been used. -.PP -Pattern-matching of NUL's is substantially slower than matching other -characters. -.PP -Dynamic resizing of the input buffer is slow, as it entails rescanning -all the text matched so far by the current (generally huge) token. -.PP -Due to both buffering of input and read-ahead, you cannot intermix -calls to routines, such as, for example, -.B getchar(), -with -.I flex -rules and expect it to work. Call -.B input() -instead. -.PP -The total table entries listed by the -.B \-v -flag excludes the number of table entries needed to determine -what rule has been matched. The number of entries is equal -to the number of DFA states if the scanner does not use -.B REJECT, -and somewhat greater than the number of states if it does. -.PP -.B REJECT -cannot be used with the -.B \-f -or -.B \-F -options. -.PP -The -.I flex -internal algorithms need documentation. -.SH SEE ALSO -.PP -lex(1), yacc(1), sed(1), awk(1). -.PP -John Levine, Tony Mason, and Doug Brown, -.I Lex & Yacc, -O'Reilly and Associates. Be sure to get the 2nd edition. -.PP -M. E. Lesk and E. Schmidt, -.I LEX \- Lexical Analyzer Generator -.PP -Alfred Aho, Ravi Sethi and Jeffrey Ullman, -.I Compilers: Principles, Techniques and Tools, -Addison-Wesley (1986). Describes the pattern-matching techniques used by -.I flex -(deterministic finite automata). -.SH AUTHOR -Vern Paxson, with the help of many ideas and much inspiration from -Van Jacobson. Original version by Jef Poskanzer. The fast table -representation is a partial implementation of a design done by Van -Jacobson. The implementation was done by Kevin Gong and Vern Paxson. -.PP -Thanks to the many -.I flex -beta-testers, feedbackers, and contributors, especially Francois Pinard, -Casey Leedom, -Robert Abramovitz, -Stan Adermann, Terry Allen, David Barker-Plummer, John Basrai, -Neal Becker, Nelson H.F. Beebe, benson@odi.com, -Karl Berry, Peter A. Bigot, Simon Blanchard, -Keith Bostic, Frederic Brehm, Ian Brockbank, Kin Cho, Nick Christopher, -Brian Clapper, J.T. Conklin, -Jason Coughlin, Bill Cox, Nick Cropper, Dave Curtis, Scott David -Daniels, Chris G. Demetriou, Theo Deraadt, -Mike Donahue, Chuck Doucette, Tom Epperly, Leo Eskin, -Chris Faylor, Chris Flatters, Jon Forrest, Jeffrey Friedl, -Joe Gayda, Kaveh R. Ghazi, Wolfgang Glunz, -Eric Goldman, Christopher M. Gould, Ulrich Grepel, Peer Griebel, -Jan Hajic, Charles Hemphill, NORO Hideo, -Jarkko Hietaniemi, Scott Hofmann, -Jeff Honig, Dana Hudes, Eric Hughes, John Interrante, -Ceriel Jacobs, Michal Jaegermann, Sakari Jalovaara, Jeffrey R. Jones, -Henry Juengst, Klaus Kaempf, Jonathan I. Kamens, Terrence O Kane, -Amir Katz, ken@ken.hilco.com, Kevin B. Kenny, -Steve Kirsch, Winfried Koenig, Marq Kole, Ronald Lamprecht, -Greg Lee, Rohan Lenard, Craig Leres, John Levine, Steve Liddle, -David Loffredo, Mike Long, -Mohamed el Lozy, Brian Madsen, Malte, Joe Marshall, -Bengt Martensson, Chris Metcalf, -Luke Mewburn, Jim Meyering, R. Alexander Milowski, Erik Naggum, -G.T. Nicol, Landon Noll, James Nordby, Marc Nozell, -Richard Ohnemus, Karsten Pahnke, -Sven Panne, Roland Pesch, Walter Pelissero, Gaumond -Pierre, Esmond Pitt, Jef Poskanzer, Joe Rahmeh, Jarmo Raiha, -Frederic Raimbault, Pat Rankin, Rick Richardson, -Kevin Rodgers, Kai Uwe Rommel, Jim Roskind, Alberto Santini, -Andreas Scherer, Darrell Schiebel, Raf Schietekat, -Doug Schmidt, Philippe Schnoebelen, Andreas Schwab, -Larry Schwimmer, Alex Siegel, Eckehard Stolz, Jan-Erik Strvmquist, -Mike Stump, Paul Stuart, Dave Tallman, Ian Lance Taylor, -Chris Thewalt, Richard M. Timoney, Jodi Tsai, -Paul Tuinenga, Gary Weik, Frank Whaley, Gerhard Wilhelms, Kent Williams, Ken -Yap, Ron Zellar, Nathan Zelle, David Zuhn, -and those whose names have slipped my marginal -mail-archiving skills but whose contributions are appreciated all the -same. -.PP -Thanks to Keith Bostic, Jon Forrest, Noah Friedman, -John Gilmore, Craig Leres, John Levine, Bob Mulcahy, G.T. -Nicol, Francois Pinard, Rich Salz, and Richard Stallman for help with various -distribution headaches. -.PP -Thanks to Esmond Pitt and Earle Horton for 8-bit character support; to -Benson Margulies and Fred Burke for C++ support; to Kent Williams and Tom -Epperly for C++ class support; to Ove Ewerlid for support of NUL's; and to -Eric Hughes for support of multiple buffers. -.PP -This work was primarily done when I was with the Real Time Systems Group -at the Lawrence Berkeley Laboratory in Berkeley, CA. Many thanks to all there -for the support I received. -.PP -Send comments to vern@ee.lbl.gov. diff --git a/commands/flex-2.5.4/flex.skl b/commands/flex-2.5.4/flex.skl deleted file mode 100644 index ec80e94be..000000000 --- a/commands/flex-2.5.4/flex.skl +++ /dev/null @@ -1,1541 +0,0 @@ -/* A lexical scanner generated by flex */ - -/* Scanner skeleton version: - * $Header$ - */ - -#define FLEX_SCANNER -#define YY_FLEX_MAJOR_VERSION 2 -#define YY_FLEX_MINOR_VERSION 5 - -%- -#include -%* - - -/* cfront 1.2 defines "c_plusplus" instead of "__cplusplus" */ -#ifdef c_plusplus -#ifndef __cplusplus -#define __cplusplus -#endif -#endif - - -#ifdef __cplusplus - -#include -%+ -class istream; -%* -#include - -/* Use prototypes in function declarations. */ -#define YY_USE_PROTOS - -/* The "const" storage-class-modifier is valid. */ -#define YY_USE_CONST - -#else /* ! __cplusplus */ - -#if __STDC__ - -#define YY_USE_PROTOS -#define YY_USE_CONST - -#endif /* __STDC__ */ -#endif /* ! __cplusplus */ - -#ifdef __TURBOC__ - #pragma warn -rch - #pragma warn -use -#include -#include -#define YY_USE_CONST -#define YY_USE_PROTOS -#endif - -#ifdef YY_USE_CONST -#define yyconst const -#else -#define yyconst -#endif - - -#ifdef YY_USE_PROTOS -#define YY_PROTO(proto) proto -#else -#define YY_PROTO(proto) () -#endif - -/* Returned upon end-of-file. */ -#define YY_NULL 0 - -/* Promotes a possibly negative, possibly signed char to an unsigned - * integer for use as an array index. If the signed char is negative, - * we want to instead treat it as an 8-bit unsigned char, hence the - * double cast. - */ -#define YY_SC_TO_UI(c) ((unsigned int) (unsigned char) c) - -/* Enter a start condition. This macro really ought to take a parameter, - * but we do it the disgusting crufty way forced on us by the ()-less - * definition of BEGIN. - */ -#define BEGIN yy_start = 1 + 2 * - -/* Translate the current start state into a value that can be later handed - * to BEGIN to return to the state. The YYSTATE alias is for lex - * compatibility. - */ -#define YY_START ((yy_start - 1) / 2) -#define YYSTATE YY_START - -/* Action number for EOF rule of a given start state. */ -#define YY_STATE_EOF(state) (YY_END_OF_BUFFER + state + 1) - -/* Special action meaning "start processing a new file". */ -#define YY_NEW_FILE yyrestart( yyin ) - -#define YY_END_OF_BUFFER_CHAR 0 - -/* Size of default input buffer. */ -#define YY_BUF_SIZE 16384 - -typedef struct yy_buffer_state *YY_BUFFER_STATE; - -extern int yyleng; -%- -extern FILE *yyin, *yyout; -%* - -#define EOB_ACT_CONTINUE_SCAN 0 -#define EOB_ACT_END_OF_FILE 1 -#define EOB_ACT_LAST_MATCH 2 - -/* The funky do-while in the following #define is used to turn the definition - * int a single C statement (which needs a semi-colon terminator). This - * avoids problems with code like: - * - * if ( condition_holds ) - * yyless( 5 ); - * else - * do_something_else(); - * - * Prior to using the do-while the compiler would get upset at the - * "else" because it interpreted the "if" statement as being all - * done when it reached the ';' after the yyless() call. - */ - -/* Return all but the first 'n' matched characters back to the input stream. */ - -#define yyless(n) \ - do \ - { \ - /* Undo effects of setting up yytext. */ \ - *yy_cp = yy_hold_char; \ - YY_RESTORE_YY_MORE_OFFSET \ - yy_c_buf_p = yy_cp = yy_bp + n - YY_MORE_ADJ; \ - YY_DO_BEFORE_ACTION; /* set up yytext again */ \ - } \ - while ( 0 ) - -#define unput(c) yyunput( c, yytext_ptr ) - -/* The following is because we cannot portably get our hands on size_t - * (without autoconf's help, which isn't available because we want - * flex-generated scanners to compile on their own). - */ -typedef unsigned int yy_size_t; - - -struct yy_buffer_state - { -%- - FILE *yy_input_file; -%+ - istream* yy_input_file; -%* - - char *yy_ch_buf; /* input buffer */ - char *yy_buf_pos; /* current position in input buffer */ - - /* Size of input buffer in bytes, not including room for EOB - * characters. - */ - yy_size_t yy_buf_size; - - /* Number of characters read into yy_ch_buf, not including EOB - * characters. - */ - int yy_n_chars; - - /* Whether we "own" the buffer - i.e., we know we created it, - * and can realloc() it to grow it, and should free() it to - * delete it. - */ - int yy_is_our_buffer; - - /* Whether this is an "interactive" input source; if so, and - * if we're using stdio for input, then we want to use getc() - * instead of fread(), to make sure we stop fetching input after - * each newline. - */ - int yy_is_interactive; - - /* Whether we're considered to be at the beginning of a line. - * If so, '^' rules will be active on the next match, otherwise - * not. - */ - int yy_at_bol; - - /* Whether to try to fill the input buffer when we reach the - * end of it. - */ - int yy_fill_buffer; - - int yy_buffer_status; -#define YY_BUFFER_NEW 0 -#define YY_BUFFER_NORMAL 1 - /* When an EOF's been seen but there's still some text to process - * then we mark the buffer as YY_EOF_PENDING, to indicate that we - * shouldn't try reading from the input source any more. We might - * still have a bunch of tokens to match, though, because of - * possible backing-up. - * - * When we actually see the EOF, we change the status to "new" - * (via yyrestart()), so that the user can continue scanning by - * just pointing yyin at a new input file. - */ -#define YY_BUFFER_EOF_PENDING 2 - }; - -%- Standard (non-C++) definition -static YY_BUFFER_STATE yy_current_buffer = 0; -%* - -/* We provide macros for accessing buffer states in case in the - * future we want to put the buffer states in a more general - * "scanner state". - */ -#define YY_CURRENT_BUFFER yy_current_buffer - - -%- Standard (non-C++) definition -/* yy_hold_char holds the character lost when yytext is formed. */ -static char yy_hold_char; - -static int yy_n_chars; /* number of characters read into yy_ch_buf */ - - -int yyleng; - -/* Points to current character in buffer. */ -static char *yy_c_buf_p = (char *) 0; -static int yy_init = 1; /* whether we need to initialize */ -static int yy_start = 0; /* start state number */ - -/* Flag which is used to allow yywrap()'s to do buffer switches - * instead of setting up a fresh yyin. A bit of a hack ... - */ -static int yy_did_buffer_switch_on_eof; - -void yyrestart YY_PROTO(( FILE *input_file )); - -void yy_switch_to_buffer YY_PROTO(( YY_BUFFER_STATE new_buffer )); -void yy_load_buffer_state YY_PROTO(( void )); -YY_BUFFER_STATE yy_create_buffer YY_PROTO(( FILE *file, int size )); -void yy_delete_buffer YY_PROTO(( YY_BUFFER_STATE b )); -void yy_init_buffer YY_PROTO(( YY_BUFFER_STATE b, FILE *file )); -void yy_flush_buffer YY_PROTO(( YY_BUFFER_STATE b )); -#define YY_FLUSH_BUFFER yy_flush_buffer( yy_current_buffer ) - -YY_BUFFER_STATE yy_scan_buffer YY_PROTO(( char *base, yy_size_t size )); -YY_BUFFER_STATE yy_scan_string YY_PROTO(( yyconst char *yy_str )); -YY_BUFFER_STATE yy_scan_bytes YY_PROTO(( yyconst char *bytes, int len )); -%* - -static void *yy_flex_alloc YY_PROTO(( yy_size_t )); -static void *yy_flex_realloc YY_PROTO(( void *, yy_size_t )); -static void yy_flex_free YY_PROTO(( void * )); - -#define yy_new_buffer yy_create_buffer - -#define yy_set_interactive(is_interactive) \ - { \ - if ( ! yy_current_buffer ) \ - yy_current_buffer = yy_create_buffer( yyin, YY_BUF_SIZE ); \ - yy_current_buffer->yy_is_interactive = is_interactive; \ - } - -#define yy_set_bol(at_bol) \ - { \ - if ( ! yy_current_buffer ) \ - yy_current_buffer = yy_create_buffer( yyin, YY_BUF_SIZE ); \ - yy_current_buffer->yy_at_bol = at_bol; \ - } - -#define YY_AT_BOL() (yy_current_buffer->yy_at_bol) - -%% yytext/yyin/yyout/yy_state_type/yylineno etc. def's & init go here - -%- Standard (non-C++) definition -static yy_state_type yy_get_previous_state YY_PROTO(( void )); -static yy_state_type yy_try_NUL_trans YY_PROTO(( yy_state_type current_state )); -static int yy_get_next_buffer YY_PROTO(( void )); -static void yy_fatal_error YY_PROTO(( yyconst char msg[] )); -%* - -/* Done after the current pattern has been matched and before the - * corresponding action - sets up yytext. - */ -#define YY_DO_BEFORE_ACTION \ - yytext_ptr = yy_bp; \ -%% code to fiddle yytext and yyleng for yymore() goes here - yy_hold_char = *yy_cp; \ - *yy_cp = '\0'; \ -%% code to copy yytext_ptr to yytext[] goes here, if %array - yy_c_buf_p = yy_cp; - -%% data tables for the DFA and the user's section 1 definitions go here - -/* Macros after this point can all be overridden by user definitions in - * section 1. - */ - -#ifndef YY_SKIP_YYWRAP -#ifdef __cplusplus -extern "C" int yywrap YY_PROTO(( void )); -#else -extern int yywrap YY_PROTO(( void )); -#endif -#endif - -%- -#ifndef YY_NO_UNPUT -static void yyunput YY_PROTO(( int c, char *buf_ptr )); -#endif -%* - -#ifndef yytext_ptr -static void yy_flex_strncpy YY_PROTO(( char *, yyconst char *, int )); -#endif - -#ifdef YY_NEED_STRLEN -static int yy_flex_strlen YY_PROTO(( yyconst char * )); -#endif - -#ifndef YY_NO_INPUT -%- Standard (non-C++) definition -#ifdef __cplusplus -static int yyinput YY_PROTO(( void )); -#else -static int input YY_PROTO(( void )); -#endif -%* -#endif - -#if YY_STACK_USED -static int yy_start_stack_ptr = 0; -static int yy_start_stack_depth = 0; -static int *yy_start_stack = 0; -#ifndef YY_NO_PUSH_STATE -static void yy_push_state YY_PROTO(( int new_state )); -#endif -#ifndef YY_NO_POP_STATE -static void yy_pop_state YY_PROTO(( void )); -#endif -#ifndef YY_NO_TOP_STATE -static int yy_top_state YY_PROTO(( void )); -#endif - -#else -#define YY_NO_PUSH_STATE 1 -#define YY_NO_POP_STATE 1 -#define YY_NO_TOP_STATE 1 -#endif - -#ifdef YY_MALLOC_DECL -YY_MALLOC_DECL -#else -#if __STDC__ -#ifndef __cplusplus -#include -#endif -#else -/* Just try to get by without declaring the routines. This will fail - * miserably on non-ANSI systems for which sizeof(size_t) != sizeof(int) - * or sizeof(void*) != sizeof(int). - */ -#endif -#endif - -/* Amount of stuff to slurp up with each read. */ -#ifndef YY_READ_BUF_SIZE -#define YY_READ_BUF_SIZE 8192 -#endif - -/* Copy whatever the last rule matched to the standard output. */ - -#ifndef ECHO -%- Standard (non-C++) definition -/* This used to be an fputs(), but since the string might contain NUL's, - * we now use fwrite(). - */ -#define ECHO (void) fwrite( yytext, yyleng, 1, yyout ) -%+ C++ definition -#define ECHO LexerOutput( yytext, yyleng ) -%* -#endif - -/* Gets input and stuffs it into "buf". number of characters read, or YY_NULL, - * is returned in "result". - */ -#ifndef YY_INPUT -#define YY_INPUT(buf,result,max_size) \ -%% fread()/read() definition of YY_INPUT goes here unless we're doing C++ -%+ C++ definition - if ( (result = LexerInput( (char *) buf, max_size )) < 0 ) \ - YY_FATAL_ERROR( "input in flex scanner failed" ); -%* -#endif - -/* No semi-colon after return; correct usage is to write "yyterminate();" - - * we don't want an extra ';' after the "return" because that will cause - * some compilers to complain about unreachable statements. - */ -#ifndef yyterminate -#define yyterminate() return YY_NULL -#endif - -/* Number of entries by which start-condition stack grows. */ -#ifndef YY_START_STACK_INCR -#define YY_START_STACK_INCR 25 -#endif - -/* Report a fatal error. */ -#ifndef YY_FATAL_ERROR -%- -#define YY_FATAL_ERROR(msg) yy_fatal_error( msg ) -%+ -#define YY_FATAL_ERROR(msg) LexerError( msg ) -%* -#endif - -/* Default declaration of generated scanner - a define so the user can - * easily add parameters. - */ -#ifndef YY_DECL -%- Standard (non-C++) definition -#define YY_DECL int yylex YY_PROTO(( void )) -%+ C++ definition -#define YY_DECL int yyFlexLexer::yylex() -%* -#endif - -/* Code executed at the beginning of each rule, after yytext and yyleng - * have been set up. - */ -#ifndef YY_USER_ACTION -#define YY_USER_ACTION -#endif - -/* Code executed at the end of each rule. */ -#ifndef YY_BREAK -#define YY_BREAK break; -#endif - -%% YY_RULE_SETUP definition goes here - -YY_DECL - { - register yy_state_type yy_current_state; - register char *yy_cp, *yy_bp; - register int yy_act; - -%% user's declarations go here - - if ( yy_init ) - { - yy_init = 0; - -#ifdef YY_USER_INIT - YY_USER_INIT; -#endif - - if ( ! yy_start ) - yy_start = 1; /* first start state */ - - if ( ! yyin ) -%- - yyin = stdin; -%+ - yyin = &cin; -%* - - if ( ! yyout ) -%- - yyout = stdout; -%+ - yyout = &cout; -%* - - if ( ! yy_current_buffer ) - yy_current_buffer = - yy_create_buffer( yyin, YY_BUF_SIZE ); - - yy_load_buffer_state(); - } - - while ( 1 ) /* loops until end-of-file is reached */ - { -%% yymore()-related code goes here - yy_cp = yy_c_buf_p; - - /* Support of yytext. */ - *yy_cp = yy_hold_char; - - /* yy_bp points to the position in yy_ch_buf of the start of - * the current run. - */ - yy_bp = yy_cp; - -%% code to set up and find next match goes here - -yy_find_action: -%% code to find the action number goes here - - YY_DO_BEFORE_ACTION; - -%% code for yylineno update goes here - -do_action: /* This label is used only to access EOF actions. */ - -%% debug code goes here - - switch ( yy_act ) - { /* beginning of action switch */ -%% actions go here - - case YY_END_OF_BUFFER: - { - /* Amount of text matched not including the EOB char. */ - int yy_amount_of_matched_text = (int) (yy_cp - yytext_ptr) - 1; - - /* Undo the effects of YY_DO_BEFORE_ACTION. */ - *yy_cp = yy_hold_char; - YY_RESTORE_YY_MORE_OFFSET - - if ( yy_current_buffer->yy_buffer_status == YY_BUFFER_NEW ) - { - /* We're scanning a new file or input source. It's - * possible that this happened because the user - * just pointed yyin at a new source and called - * yylex(). If so, then we have to assure - * consistency between yy_current_buffer and our - * globals. Here is the right place to do so, because - * this is the first action (other than possibly a - * back-up) that will match for the new input source. - */ - yy_n_chars = yy_current_buffer->yy_n_chars; - yy_current_buffer->yy_input_file = yyin; - yy_current_buffer->yy_buffer_status = YY_BUFFER_NORMAL; - } - - /* Note that here we test for yy_c_buf_p "<=" to the position - * of the first EOB in the buffer, since yy_c_buf_p will - * already have been incremented past the NUL character - * (since all states make transitions on EOB to the - * end-of-buffer state). Contrast this with the test - * in input(). - */ - if ( yy_c_buf_p <= &yy_current_buffer->yy_ch_buf[yy_n_chars] ) - { /* This was really a NUL. */ - yy_state_type yy_next_state; - - yy_c_buf_p = yytext_ptr + yy_amount_of_matched_text; - - yy_current_state = yy_get_previous_state(); - - /* Okay, we're now positioned to make the NUL - * transition. We couldn't have - * yy_get_previous_state() go ahead and do it - * for us because it doesn't know how to deal - * with the possibility of jamming (and we don't - * want to build jamming into it because then it - * will run more slowly). - */ - - yy_next_state = yy_try_NUL_trans( yy_current_state ); - - yy_bp = yytext_ptr + YY_MORE_ADJ; - - if ( yy_next_state ) - { - /* Consume the NUL. */ - yy_cp = ++yy_c_buf_p; - yy_current_state = yy_next_state; - goto yy_match; - } - - else - { -%% code to do back-up for compressed tables and set up yy_cp goes here - goto yy_find_action; - } - } - - else switch ( yy_get_next_buffer() ) - { - case EOB_ACT_END_OF_FILE: - { - yy_did_buffer_switch_on_eof = 0; - - if ( yywrap() ) - { - /* Note: because we've taken care in - * yy_get_next_buffer() to have set up - * yytext, we can now set up - * yy_c_buf_p so that if some total - * hoser (like flex itself) wants to - * call the scanner after we return the - * YY_NULL, it'll still work - another - * YY_NULL will get returned. - */ - yy_c_buf_p = yytext_ptr + YY_MORE_ADJ; - - yy_act = YY_STATE_EOF(YY_START); - goto do_action; - } - - else - { - if ( ! yy_did_buffer_switch_on_eof ) - YY_NEW_FILE; - } - break; - } - - case EOB_ACT_CONTINUE_SCAN: - yy_c_buf_p = - yytext_ptr + yy_amount_of_matched_text; - - yy_current_state = yy_get_previous_state(); - - yy_cp = yy_c_buf_p; - yy_bp = yytext_ptr + YY_MORE_ADJ; - goto yy_match; - - case EOB_ACT_LAST_MATCH: - yy_c_buf_p = - &yy_current_buffer->yy_ch_buf[yy_n_chars]; - - yy_current_state = yy_get_previous_state(); - - yy_cp = yy_c_buf_p; - yy_bp = yytext_ptr + YY_MORE_ADJ; - goto yy_find_action; - } - break; - } - - default: - YY_FATAL_ERROR( - "fatal flex scanner internal error--no action found" ); - } /* end of action switch */ - } /* end of scanning one token */ - } /* end of yylex */ - -%+ -yyFlexLexer::yyFlexLexer( istream* arg_yyin, ostream* arg_yyout ) - { - yyin = arg_yyin; - yyout = arg_yyout; - yy_c_buf_p = 0; - yy_init = 1; - yy_start = 0; - yy_flex_debug = 0; - yylineno = 1; // this will only get updated if %option yylineno - - yy_did_buffer_switch_on_eof = 0; - - yy_looking_for_trail_begin = 0; - yy_more_flag = 0; - yy_more_len = 0; - yy_more_offset = yy_prev_more_offset = 0; - - yy_start_stack_ptr = yy_start_stack_depth = 0; - yy_start_stack = 0; - - yy_current_buffer = 0; - -#ifdef YY_USES_REJECT - yy_state_buf = new yy_state_type[YY_BUF_SIZE + 2]; -#else - yy_state_buf = 0; -#endif - } - -yyFlexLexer::~yyFlexLexer() - { - delete yy_state_buf; - yy_delete_buffer( yy_current_buffer ); - } - -void yyFlexLexer::switch_streams( istream* new_in, ostream* new_out ) - { - if ( new_in ) - { - yy_delete_buffer( yy_current_buffer ); - yy_switch_to_buffer( yy_create_buffer( new_in, YY_BUF_SIZE ) ); - } - - if ( new_out ) - yyout = new_out; - } - -#ifdef YY_INTERACTIVE -int yyFlexLexer::LexerInput( char* buf, int /* max_size */ ) -#else -int yyFlexLexer::LexerInput( char* buf, int max_size ) -#endif - { - if ( yyin->eof() || yyin->fail() ) - return 0; - -#ifdef YY_INTERACTIVE - yyin->get( buf[0] ); - - if ( yyin->eof() ) - return 0; - - if ( yyin->bad() ) - return -1; - - return 1; - -#else - (void) yyin->read( buf, max_size ); - - if ( yyin->bad() ) - return -1; - else - return yyin->gcount(); -#endif - } - -void yyFlexLexer::LexerOutput( const char* buf, int size ) - { - (void) yyout->write( buf, size ); - } -%* - -/* yy_get_next_buffer - try to read in a new buffer - * - * Returns a code representing an action: - * EOB_ACT_LAST_MATCH - - * EOB_ACT_CONTINUE_SCAN - continue scanning from current position - * EOB_ACT_END_OF_FILE - end of file - */ - -%- -static int yy_get_next_buffer() -%+ -int yyFlexLexer::yy_get_next_buffer() -%* - { - register char *dest = yy_current_buffer->yy_ch_buf; - register char *source = yytext_ptr; - register int number_to_move, i; - int ret_val; - - if ( yy_c_buf_p > &yy_current_buffer->yy_ch_buf[yy_n_chars + 1] ) - YY_FATAL_ERROR( - "fatal flex scanner internal error--end of buffer missed" ); - - if ( yy_current_buffer->yy_fill_buffer == 0 ) - { /* Don't try to fill the buffer, so this is an EOF. */ - if ( yy_c_buf_p - yytext_ptr - YY_MORE_ADJ == 1 ) - { - /* We matched a single character, the EOB, so - * treat this as a final EOF. - */ - return EOB_ACT_END_OF_FILE; - } - - else - { - /* We matched some text prior to the EOB, first - * process it. - */ - return EOB_ACT_LAST_MATCH; - } - } - - /* Try to read more data. */ - - /* First move last chars to start of buffer. */ - number_to_move = (int) (yy_c_buf_p - yytext_ptr) - 1; - - for ( i = 0; i < number_to_move; ++i ) - *(dest++) = *(source++); - - if ( yy_current_buffer->yy_buffer_status == YY_BUFFER_EOF_PENDING ) - /* don't do the read, it's not guaranteed to return an EOF, - * just force an EOF - */ - yy_current_buffer->yy_n_chars = yy_n_chars = 0; - - else - { - int num_to_read = - yy_current_buffer->yy_buf_size - number_to_move - 1; - - while ( num_to_read <= 0 ) - { /* Not enough room in the buffer - grow it. */ -#ifdef YY_USES_REJECT - YY_FATAL_ERROR( -"input buffer overflow, can't enlarge buffer because scanner uses REJECT" ); -#else - - /* just a shorter name for the current buffer */ - YY_BUFFER_STATE b = yy_current_buffer; - - int yy_c_buf_p_offset = - (int) (yy_c_buf_p - b->yy_ch_buf); - - if ( b->yy_is_our_buffer ) - { - int new_size = b->yy_buf_size * 2; - - if ( new_size <= 0 ) - b->yy_buf_size += b->yy_buf_size / 8; - else - b->yy_buf_size *= 2; - - b->yy_ch_buf = (char *) - /* Include room in for 2 EOB chars. */ - yy_flex_realloc( (void *) b->yy_ch_buf, - b->yy_buf_size + 2 ); - } - else - /* Can't grow it, we don't own it. */ - b->yy_ch_buf = 0; - - if ( ! b->yy_ch_buf ) - YY_FATAL_ERROR( - "fatal error - scanner input buffer overflow" ); - - yy_c_buf_p = &b->yy_ch_buf[yy_c_buf_p_offset]; - - num_to_read = yy_current_buffer->yy_buf_size - - number_to_move - 1; -#endif - } - - if ( num_to_read > YY_READ_BUF_SIZE ) - num_to_read = YY_READ_BUF_SIZE; - - /* Read in more data. */ - YY_INPUT( (&yy_current_buffer->yy_ch_buf[number_to_move]), - yy_n_chars, num_to_read ); - - yy_current_buffer->yy_n_chars = yy_n_chars; - } - - if ( yy_n_chars == 0 ) - { - if ( number_to_move == YY_MORE_ADJ ) - { - ret_val = EOB_ACT_END_OF_FILE; - yyrestart( yyin ); - } - - else - { - ret_val = EOB_ACT_LAST_MATCH; - yy_current_buffer->yy_buffer_status = - YY_BUFFER_EOF_PENDING; - } - } - - else - ret_val = EOB_ACT_CONTINUE_SCAN; - - yy_n_chars += number_to_move; - yy_current_buffer->yy_ch_buf[yy_n_chars] = YY_END_OF_BUFFER_CHAR; - yy_current_buffer->yy_ch_buf[yy_n_chars + 1] = YY_END_OF_BUFFER_CHAR; - - yytext_ptr = &yy_current_buffer->yy_ch_buf[0]; - - return ret_val; - } - - -/* yy_get_previous_state - get the state just before the EOB char was reached */ - -%- -static yy_state_type yy_get_previous_state() -%+ -yy_state_type yyFlexLexer::yy_get_previous_state() -%* - { - register yy_state_type yy_current_state; - register char *yy_cp; - -%% code to get the start state into yy_current_state goes here - - for ( yy_cp = yytext_ptr + YY_MORE_ADJ; yy_cp < yy_c_buf_p; ++yy_cp ) - { -%% code to find the next state goes here - } - - return yy_current_state; - } - - -/* yy_try_NUL_trans - try to make a transition on the NUL character - * - * synopsis - * next_state = yy_try_NUL_trans( current_state ); - */ - -%- -#ifdef YY_USE_PROTOS -static yy_state_type yy_try_NUL_trans( yy_state_type yy_current_state ) -#else -static yy_state_type yy_try_NUL_trans( yy_current_state ) -yy_state_type yy_current_state; -#endif -%+ -yy_state_type yyFlexLexer::yy_try_NUL_trans( yy_state_type yy_current_state ) -%* - { - register int yy_is_jam; -%% code to find the next state, and perhaps do backing up, goes here - - return yy_is_jam ? 0 : yy_current_state; - } - - -%- -#ifndef YY_NO_UNPUT -#ifdef YY_USE_PROTOS -static void yyunput( int c, register char *yy_bp ) -#else -static void yyunput( c, yy_bp ) -int c; -register char *yy_bp; -#endif -%+ -void yyFlexLexer::yyunput( int c, register char* yy_bp ) -%* - { - register char *yy_cp = yy_c_buf_p; - - /* undo effects of setting up yytext */ - *yy_cp = yy_hold_char; - - if ( yy_cp < yy_current_buffer->yy_ch_buf + 2 ) - { /* need to shift things up to make room */ - /* +2 for EOB chars. */ - register int number_to_move = yy_n_chars + 2; - register char *dest = &yy_current_buffer->yy_ch_buf[ - yy_current_buffer->yy_buf_size + 2]; - register char *source = - &yy_current_buffer->yy_ch_buf[number_to_move]; - - while ( source > yy_current_buffer->yy_ch_buf ) - *--dest = *--source; - - yy_cp += (int) (dest - source); - yy_bp += (int) (dest - source); - yy_current_buffer->yy_n_chars = - yy_n_chars = yy_current_buffer->yy_buf_size; - - if ( yy_cp < yy_current_buffer->yy_ch_buf + 2 ) - YY_FATAL_ERROR( "flex scanner push-back overflow" ); - } - - *--yy_cp = (char) c; - -%% update yylineno here - - yytext_ptr = yy_bp; - yy_hold_char = *yy_cp; - yy_c_buf_p = yy_cp; - } -%- -#endif /* ifndef YY_NO_UNPUT */ -%* - - -%- -#ifdef __cplusplus -static int yyinput() -#else -static int input() -#endif -%+ -int yyFlexLexer::yyinput() -%* - { - int c; - - *yy_c_buf_p = yy_hold_char; - - if ( *yy_c_buf_p == YY_END_OF_BUFFER_CHAR ) - { - /* yy_c_buf_p now points to the character we want to return. - * If this occurs *before* the EOB characters, then it's a - * valid NUL; if not, then we've hit the end of the buffer. - */ - if ( yy_c_buf_p < &yy_current_buffer->yy_ch_buf[yy_n_chars] ) - /* This was really a NUL. */ - *yy_c_buf_p = '\0'; - - else - { /* need more input */ - int offset = yy_c_buf_p - yytext_ptr; - ++yy_c_buf_p; - - switch ( yy_get_next_buffer() ) - { - case EOB_ACT_LAST_MATCH: - /* This happens because yy_g_n_b() - * sees that we've accumulated a - * token and flags that we need to - * try matching the token before - * proceeding. But for input(), - * there's no matching to consider. - * So convert the EOB_ACT_LAST_MATCH - * to EOB_ACT_END_OF_FILE. - */ - - /* Reset buffer status. */ - yyrestart( yyin ); - - /* fall through */ - - case EOB_ACT_END_OF_FILE: - { - if ( yywrap() ) - return EOF; - - if ( ! yy_did_buffer_switch_on_eof ) - YY_NEW_FILE; -#ifdef __cplusplus - return yyinput(); -#else - return input(); -#endif - } - - case EOB_ACT_CONTINUE_SCAN: - yy_c_buf_p = yytext_ptr + offset; - break; - } - } - } - - c = *(unsigned char *) yy_c_buf_p; /* cast for 8-bit char's */ - *yy_c_buf_p = '\0'; /* preserve yytext */ - yy_hold_char = *++yy_c_buf_p; - -%% update BOL and yylineno - - return c; - } - - -%- -#ifdef YY_USE_PROTOS -void yyrestart( FILE *input_file ) -#else -void yyrestart( input_file ) -FILE *input_file; -#endif -%+ -void yyFlexLexer::yyrestart( istream* input_file ) -%* - { - if ( ! yy_current_buffer ) - yy_current_buffer = yy_create_buffer( yyin, YY_BUF_SIZE ); - - yy_init_buffer( yy_current_buffer, input_file ); - yy_load_buffer_state(); - } - - -%- -#ifdef YY_USE_PROTOS -void yy_switch_to_buffer( YY_BUFFER_STATE new_buffer ) -#else -void yy_switch_to_buffer( new_buffer ) -YY_BUFFER_STATE new_buffer; -#endif -%+ -void yyFlexLexer::yy_switch_to_buffer( YY_BUFFER_STATE new_buffer ) -%* - { - if ( yy_current_buffer == new_buffer ) - return; - - if ( yy_current_buffer ) - { - /* Flush out information for old buffer. */ - *yy_c_buf_p = yy_hold_char; - yy_current_buffer->yy_buf_pos = yy_c_buf_p; - yy_current_buffer->yy_n_chars = yy_n_chars; - } - - yy_current_buffer = new_buffer; - yy_load_buffer_state(); - - /* We don't actually know whether we did this switch during - * EOF (yywrap()) processing, but the only time this flag - * is looked at is after yywrap() is called, so it's safe - * to go ahead and always set it. - */ - yy_did_buffer_switch_on_eof = 1; - } - - -%- -#ifdef YY_USE_PROTOS -void yy_load_buffer_state( void ) -#else -void yy_load_buffer_state() -#endif -%+ -void yyFlexLexer::yy_load_buffer_state() -%* - { - yy_n_chars = yy_current_buffer->yy_n_chars; - yytext_ptr = yy_c_buf_p = yy_current_buffer->yy_buf_pos; - yyin = yy_current_buffer->yy_input_file; - yy_hold_char = *yy_c_buf_p; - } - - -%- -#ifdef YY_USE_PROTOS -YY_BUFFER_STATE yy_create_buffer( FILE *file, int size ) -#else -YY_BUFFER_STATE yy_create_buffer( file, size ) -FILE *file; -int size; -#endif -%+ -YY_BUFFER_STATE yyFlexLexer::yy_create_buffer( istream* file, int size ) -%* - { - YY_BUFFER_STATE b; - - b = (YY_BUFFER_STATE) yy_flex_alloc( sizeof( struct yy_buffer_state ) ); - if ( ! b ) - YY_FATAL_ERROR( "out of dynamic memory in yy_create_buffer()" ); - - b->yy_buf_size = size; - - /* yy_ch_buf has to be 2 characters longer than the size given because - * we need to put in 2 end-of-buffer characters. - */ - b->yy_ch_buf = (char *) yy_flex_alloc( b->yy_buf_size + 2 ); - if ( ! b->yy_ch_buf ) - YY_FATAL_ERROR( "out of dynamic memory in yy_create_buffer()" ); - - b->yy_is_our_buffer = 1; - - yy_init_buffer( b, file ); - - return b; - } - - -%- -#ifdef YY_USE_PROTOS -void yy_delete_buffer( YY_BUFFER_STATE b ) -#else -void yy_delete_buffer( b ) -YY_BUFFER_STATE b; -#endif -%+ -void yyFlexLexer::yy_delete_buffer( YY_BUFFER_STATE b ) -%* - { - if ( ! b ) - return; - - if ( b == yy_current_buffer ) - yy_current_buffer = (YY_BUFFER_STATE) 0; - - if ( b->yy_is_our_buffer ) - yy_flex_free( (void *) b->yy_ch_buf ); - - yy_flex_free( (void *) b ); - } - - -%- -#ifndef YY_ALWAYS_INTERACTIVE -#ifndef YY_NEVER_INTERACTIVE -extern int isatty YY_PROTO(( int )); -#endif -#endif - -#ifdef YY_USE_PROTOS -void yy_init_buffer( YY_BUFFER_STATE b, FILE *file ) -#else -void yy_init_buffer( b, file ) -YY_BUFFER_STATE b; -FILE *file; -#endif - -%+ -extern "C" int isatty YY_PROTO(( int )); -void yyFlexLexer::yy_init_buffer( YY_BUFFER_STATE b, istream* file ) -%* - - { - yy_flush_buffer( b ); - - b->yy_input_file = file; - b->yy_fill_buffer = 1; - -%- -#if YY_ALWAYS_INTERACTIVE - b->yy_is_interactive = 1; -#else -#if YY_NEVER_INTERACTIVE - b->yy_is_interactive = 0; -#else - b->yy_is_interactive = file ? (isatty( fileno(file) ) > 0) : 0; -#endif -#endif -%+ - b->yy_is_interactive = 0; -%* - } - - -%- -#ifdef YY_USE_PROTOS -void yy_flush_buffer( YY_BUFFER_STATE b ) -#else -void yy_flush_buffer( b ) -YY_BUFFER_STATE b; -#endif - -%+ -void yyFlexLexer::yy_flush_buffer( YY_BUFFER_STATE b ) -%* - { - if ( ! b ) - return; - - b->yy_n_chars = 0; - - /* We always need two end-of-buffer characters. The first causes - * a transition to the end-of-buffer state. The second causes - * a jam in that state. - */ - b->yy_ch_buf[0] = YY_END_OF_BUFFER_CHAR; - b->yy_ch_buf[1] = YY_END_OF_BUFFER_CHAR; - - b->yy_buf_pos = &b->yy_ch_buf[0]; - - b->yy_at_bol = 1; - b->yy_buffer_status = YY_BUFFER_NEW; - - if ( b == yy_current_buffer ) - yy_load_buffer_state(); - } -%* - - -#ifndef YY_NO_SCAN_BUFFER -%- -#ifdef YY_USE_PROTOS -YY_BUFFER_STATE yy_scan_buffer( char *base, yy_size_t size ) -#else -YY_BUFFER_STATE yy_scan_buffer( base, size ) -char *base; -yy_size_t size; -#endif - { - YY_BUFFER_STATE b; - - if ( size < 2 || - base[size-2] != YY_END_OF_BUFFER_CHAR || - base[size-1] != YY_END_OF_BUFFER_CHAR ) - /* They forgot to leave room for the EOB's. */ - return 0; - - b = (YY_BUFFER_STATE) yy_flex_alloc( sizeof( struct yy_buffer_state ) ); - if ( ! b ) - YY_FATAL_ERROR( "out of dynamic memory in yy_scan_buffer()" ); - - b->yy_buf_size = size - 2; /* "- 2" to take care of EOB's */ - b->yy_buf_pos = b->yy_ch_buf = base; - b->yy_is_our_buffer = 0; - b->yy_input_file = 0; - b->yy_n_chars = b->yy_buf_size; - b->yy_is_interactive = 0; - b->yy_at_bol = 1; - b->yy_fill_buffer = 0; - b->yy_buffer_status = YY_BUFFER_NEW; - - yy_switch_to_buffer( b ); - - return b; - } -%* -#endif - - -#ifndef YY_NO_SCAN_STRING -%- -#ifdef YY_USE_PROTOS -YY_BUFFER_STATE yy_scan_string( yyconst char *yy_str ) -#else -YY_BUFFER_STATE yy_scan_string( yy_str ) -yyconst char *yy_str; -#endif - { - int len; - for ( len = 0; yy_str[len]; ++len ) - ; - - return yy_scan_bytes( yy_str, len ); - } -%* -#endif - - -#ifndef YY_NO_SCAN_BYTES -%- -#ifdef YY_USE_PROTOS -YY_BUFFER_STATE yy_scan_bytes( yyconst char *bytes, int len ) -#else -YY_BUFFER_STATE yy_scan_bytes( bytes, len ) -yyconst char *bytes; -int len; -#endif - { - YY_BUFFER_STATE b; - char *buf; - yy_size_t n; - int i; - - /* Get memory for full buffer, including space for trailing EOB's. */ - n = len + 2; - buf = (char *) yy_flex_alloc( n ); - if ( ! buf ) - YY_FATAL_ERROR( "out of dynamic memory in yy_scan_bytes()" ); - - for ( i = 0; i < len; ++i ) - buf[i] = bytes[i]; - - buf[len] = buf[len+1] = YY_END_OF_BUFFER_CHAR; - - b = yy_scan_buffer( buf, n ); - if ( ! b ) - YY_FATAL_ERROR( "bad buffer in yy_scan_bytes()" ); - - /* It's okay to grow etc. this buffer, and we should throw it - * away when we're done. - */ - b->yy_is_our_buffer = 1; - - return b; - } -%* -#endif - - -#ifndef YY_NO_PUSH_STATE -%- -#ifdef YY_USE_PROTOS -static void yy_push_state( int new_state ) -#else -static void yy_push_state( new_state ) -int new_state; -#endif -%+ -void yyFlexLexer::yy_push_state( int new_state ) -%* - { - if ( yy_start_stack_ptr >= yy_start_stack_depth ) - { - yy_size_t new_size; - - yy_start_stack_depth += YY_START_STACK_INCR; - new_size = yy_start_stack_depth * sizeof( int ); - - if ( ! yy_start_stack ) - yy_start_stack = (int *) yy_flex_alloc( new_size ); - - else - yy_start_stack = (int *) yy_flex_realloc( - (void *) yy_start_stack, new_size ); - - if ( ! yy_start_stack ) - YY_FATAL_ERROR( - "out of memory expanding start-condition stack" ); - } - - yy_start_stack[yy_start_stack_ptr++] = YY_START; - - BEGIN(new_state); - } -#endif - - -#ifndef YY_NO_POP_STATE -%- -static void yy_pop_state() -%+ -void yyFlexLexer::yy_pop_state() -%* - { - if ( --yy_start_stack_ptr < 0 ) - YY_FATAL_ERROR( "start-condition stack underflow" ); - - BEGIN(yy_start_stack[yy_start_stack_ptr]); - } -#endif - - -#ifndef YY_NO_TOP_STATE -%- -static int yy_top_state() -%+ -int yyFlexLexer::yy_top_state() -%* - { - return yy_start_stack[yy_start_stack_ptr - 1]; - } -#endif - -#ifndef YY_EXIT_FAILURE -#define YY_EXIT_FAILURE 2 -#endif - -%- -#ifdef YY_USE_PROTOS -static void yy_fatal_error( yyconst char msg[] ) -#else -static void yy_fatal_error( msg ) -char msg[]; -#endif - { - (void) fprintf( stderr, "%s\n", msg ); - exit( YY_EXIT_FAILURE ); - } - -%+ - -void yyFlexLexer::LexerError( yyconst char msg[] ) - { - cerr << msg << '\n'; - exit( YY_EXIT_FAILURE ); - } -%* - - -/* Redefine yyless() so it works in section 3 code. */ - -#undef yyless -#define yyless(n) \ - do \ - { \ - /* Undo effects of setting up yytext. */ \ - yytext[yyleng] = yy_hold_char; \ - yy_c_buf_p = yytext + n; \ - yy_hold_char = *yy_c_buf_p; \ - *yy_c_buf_p = '\0'; \ - yyleng = n; \ - } \ - while ( 0 ) - - -/* Internal utility routines. */ - -#ifndef yytext_ptr -#ifdef YY_USE_PROTOS -static void yy_flex_strncpy( char *s1, yyconst char *s2, int n ) -#else -static void yy_flex_strncpy( s1, s2, n ) -char *s1; -yyconst char *s2; -int n; -#endif - { - register int i; - for ( i = 0; i < n; ++i ) - s1[i] = s2[i]; - } -#endif - -#ifdef YY_NEED_STRLEN -#ifdef YY_USE_PROTOS -static int yy_flex_strlen( yyconst char *s ) -#else -static int yy_flex_strlen( s ) -yyconst char *s; -#endif - { - register int n; - for ( n = 0; s[n]; ++n ) - ; - - return n; - } -#endif - - -#ifdef YY_USE_PROTOS -static void *yy_flex_alloc( yy_size_t size ) -#else -static void *yy_flex_alloc( size ) -yy_size_t size; -#endif - { - return (void *) malloc( size ); - } - -#ifdef YY_USE_PROTOS -static void *yy_flex_realloc( void *ptr, yy_size_t size ) -#else -static void *yy_flex_realloc( ptr, size ) -void *ptr; -yy_size_t size; -#endif - { - /* The cast to (char *) in the following accommodates both - * implementations that use char* generic pointers, and those - * that use void* generic pointers. It works with the latter - * because both ANSI C and C++ allow castless assignment from - * any pointer type to void*, and deal with argument conversions - * as though doing an assignment. - */ - return (void *) realloc( (char *) ptr, size ); - } - -#ifdef YY_USE_PROTOS -static void yy_flex_free( void *ptr ) -#else -static void yy_flex_free( ptr ) -void *ptr; -#endif - { - free( ptr ); - } - -#if YY_MAIN -int main() - { - yylex(); - return 0; - } -#endif diff --git a/commands/flex-2.5.4/flexdef.h b/commands/flex-2.5.4/flexdef.h deleted file mode 100644 index bc70df3cc..000000000 --- a/commands/flex-2.5.4/flexdef.h +++ /dev/null @@ -1,1048 +0,0 @@ -/* flexdef - definitions file for flex */ - -/*- - * Copyright (c) 1990 The Regents of the University of California. - * All rights reserved. - * - * This code is derived from software contributed to Berkeley by - * Vern Paxson. - * - * The United States Government has rights in this work pursuant - * to contract no. DE-AC03-76SF00098 between the United States - * Department of Energy and the University of California. - * - * Redistribution and use in source and binary forms with or without - * modification are permitted provided that: (1) source distributions retain - * this entire copyright notice and comment, and (2) distributions including - * binaries display the following acknowledgement: ``This product includes - * software developed by the University of California, Berkeley and its - * contributors'' in the documentation or other materials provided with the - * distribution and in all advertising materials mentioning features or use - * of this software. Neither the name of the University nor the names of - * its contributors may be used to endorse or promote products derived from - * this software without specific prior written permission. - * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED - * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF - * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. - */ - -/* @(#) $Header$ (LBL) */ - -#include -#include - -#include "config.h" - -#ifdef __TURBOC__ -#define HAVE_STRING_H 1 -#define MS_DOS 1 -#ifndef __STDC__ -#define __STDC__ 1 -#endif - #pragma warn -pro - #pragma warn -rch - #pragma warn -use - #pragma warn -aus - #pragma warn -par - #pragma warn -pia -#endif - -#ifdef HAVE_STRING_H -#include -#else -#include -#endif - -#ifdef HAVE_SYS_TYPES_H -#include -#endif - -#ifdef HAVE_MALLOC_H -#include -#endif - -#ifdef STDC_HEADERS -#include -#endif - -/* As an aid for the internationalization patch to flex, which - * is maintained outside this distribution for copyright reasons. - */ -#define _(String) (String) - -/* Always be prepared to generate an 8-bit scanner. */ -#define CSIZE 256 -#define Char unsigned char - -/* Size of input alphabet - should be size of ASCII set. */ -#ifndef DEFAULT_CSIZE -#define DEFAULT_CSIZE 128 -#endif - -#ifndef PROTO -#if __STDC__ -#define PROTO(proto) proto -#else -#define PROTO(proto) () -#endif -#endif - -#ifdef VMS -#ifndef __VMS_POSIX -#define unlink remove -#define SHORT_FILE_NAMES -#endif -#endif - -#ifdef MS_DOS -#define SHORT_FILE_NAMES -#endif - - -/* Maximum line length we'll have to deal with. */ -#define MAXLINE 2048 - -#ifndef MIN -#define MIN(x,y) ((x) < (y) ? (x) : (y)) -#endif -#ifndef MAX -#define MAX(x,y) ((x) > (y) ? (x) : (y)) -#endif -#ifndef ABS -#define ABS(x) ((x) < 0 ? -(x) : (x)) -#endif - - -/* ANSI C does not guarantee that isascii() is defined */ -#ifndef isascii -#define isascii(c) ((c) <= 0177) -#endif - - -#define true 1 -#define false 0 -#define unspecified -1 - - -/* Special chk[] values marking the slots taking by end-of-buffer and action - * numbers. - */ -#define EOB_POSITION -1 -#define ACTION_POSITION -2 - -/* Number of data items per line for -f output. */ -#define NUMDATAITEMS 10 - -/* Number of lines of data in -f output before inserting a blank line for - * readability. - */ -#define NUMDATALINES 10 - -/* transition_struct_out() definitions. */ -#define TRANS_STRUCT_PRINT_LENGTH 14 - -/* Returns true if an nfa state has an epsilon out-transition slot - * that can be used. This definition is currently not used. - */ -#define FREE_EPSILON(state) \ - (transchar[state] == SYM_EPSILON && \ - trans2[state] == NO_TRANSITION && \ - finalst[state] != state) - -/* Returns true if an nfa state has an epsilon out-transition character - * and both slots are free - */ -#define SUPER_FREE_EPSILON(state) \ - (transchar[state] == SYM_EPSILON && \ - trans1[state] == NO_TRANSITION) \ - -/* Maximum number of NFA states that can comprise a DFA state. It's real - * big because if there's a lot of rules, the initial state will have a - * huge epsilon closure. - */ -#define INITIAL_MAX_DFA_SIZE 750 -#define MAX_DFA_SIZE_INCREMENT 750 - - -/* A note on the following masks. They are used to mark accepting numbers - * as being special. As such, they implicitly limit the number of accepting - * numbers (i.e., rules) because if there are too many rules the rule numbers - * will overload the mask bits. Fortunately, this limit is \large/ (0x2000 == - * 8192) so unlikely to actually cause any problems. A check is made in - * new_rule() to ensure that this limit is not reached. - */ - -/* Mask to mark a trailing context accepting number. */ -#define YY_TRAILING_MASK 0x2000 - -/* Mask to mark the accepting number of the "head" of a trailing context - * rule. - */ -#define YY_TRAILING_HEAD_MASK 0x4000 - -/* Maximum number of rules, as outlined in the above note. */ -#define MAX_RULE (YY_TRAILING_MASK - 1) - - -/* NIL must be 0. If not, its special meaning when making equivalence classes - * (it marks the representative of a given e.c.) will be unidentifiable. - */ -#define NIL 0 - -#define JAM -1 /* to mark a missing DFA transition */ -#define NO_TRANSITION NIL -#define UNIQUE -1 /* marks a symbol as an e.c. representative */ -#define INFINITY -1 /* for x{5,} constructions */ - -#define INITIAL_MAX_CCLS 100 /* max number of unique character classes */ -#define MAX_CCLS_INCREMENT 100 - -/* Size of table holding members of character classes. */ -#define INITIAL_MAX_CCL_TBL_SIZE 500 -#define MAX_CCL_TBL_SIZE_INCREMENT 250 - -#define INITIAL_MAX_RULES 100 /* default maximum number of rules */ -#define MAX_RULES_INCREMENT 100 - -#define INITIAL_MNS 2000 /* default maximum number of nfa states */ -#define MNS_INCREMENT 1000 /* amount to bump above by if it's not enough */ - -#define INITIAL_MAX_DFAS 1000 /* default maximum number of dfa states */ -#define MAX_DFAS_INCREMENT 1000 - -#define JAMSTATE -32766 /* marks a reference to the state that always jams */ - -/* Maximum number of NFA states. */ -#define MAXIMUM_MNS 31999 - -/* Enough so that if it's subtracted from an NFA state number, the result - * is guaranteed to be negative. - */ -#define MARKER_DIFFERENCE (MAXIMUM_MNS+2) - -/* Maximum number of nxt/chk pairs for non-templates. */ -#define INITIAL_MAX_XPAIRS 2000 -#define MAX_XPAIRS_INCREMENT 2000 - -/* Maximum number of nxt/chk pairs needed for templates. */ -#define INITIAL_MAX_TEMPLATE_XPAIRS 2500 -#define MAX_TEMPLATE_XPAIRS_INCREMENT 2500 - -#define SYM_EPSILON (CSIZE + 1) /* to mark transitions on the symbol epsilon */ - -#define INITIAL_MAX_SCS 40 /* maximum number of start conditions */ -#define MAX_SCS_INCREMENT 40 /* amount to bump by if it's not enough */ - -#define ONE_STACK_SIZE 500 /* stack of states with only one out-transition */ -#define SAME_TRANS -1 /* transition is the same as "default" entry for state */ - -/* The following percentages are used to tune table compression: - - * The percentage the number of out-transitions a state must be of the - * number of equivalence classes in order to be considered for table - * compaction by using protos. - */ -#define PROTO_SIZE_PERCENTAGE 15 - -/* The percentage the number of homogeneous out-transitions of a state - * must be of the number of total out-transitions of the state in order - * that the state's transition table is first compared with a potential - * template of the most common out-transition instead of with the first - * proto in the proto queue. - */ -#define CHECK_COM_PERCENTAGE 50 - -/* The percentage the number of differences between a state's transition - * table and the proto it was first compared with must be of the total - * number of out-transitions of the state in order to keep the first - * proto as a good match and not search any further. - */ -#define FIRST_MATCH_DIFF_PERCENTAGE 10 - -/* The percentage the number of differences between a state's transition - * table and the most similar proto must be of the state's total number - * of out-transitions to use the proto as an acceptable close match. - */ -#define ACCEPTABLE_DIFF_PERCENTAGE 50 - -/* The percentage the number of homogeneous out-transitions of a state - * must be of the number of total out-transitions of the state in order - * to consider making a template from the state. - */ -#define TEMPLATE_SAME_PERCENTAGE 60 - -/* The percentage the number of differences between a state's transition - * table and the most similar proto must be of the state's total number - * of out-transitions to create a new proto from the state. - */ -#define NEW_PROTO_DIFF_PERCENTAGE 20 - -/* The percentage the total number of out-transitions of a state must be - * of the number of equivalence classes in order to consider trying to - * fit the transition table into "holes" inside the nxt/chk table. - */ -#define INTERIOR_FIT_PERCENTAGE 15 - -/* Size of region set aside to cache the complete transition table of - * protos on the proto queue to enable quick comparisons. - */ -#define PROT_SAVE_SIZE 2000 - -#define MSP 50 /* maximum number of saved protos (protos on the proto queue) */ - -/* Maximum number of out-transitions a state can have that we'll rummage - * around through the interior of the internal fast table looking for a - * spot for it. - */ -#define MAX_XTIONS_FULL_INTERIOR_FIT 4 - -/* Maximum number of rules which will be reported as being associated - * with a DFA state. - */ -#define MAX_ASSOC_RULES 100 - -/* Number that, if used to subscript an array, has a good chance of producing - * an error; should be small enough to fit into a short. - */ -#define BAD_SUBSCRIPT -32767 - -/* Absolute value of largest number that can be stored in a short, with a - * bit of slop thrown in for general paranoia. - */ -#define MAX_SHORT 32700 - - -/* Declarations for global variables. */ - -/* Variables for symbol tables: - * sctbl - start-condition symbol table - * ndtbl - name-definition symbol table - * ccltab - character class text symbol table - */ - -struct hash_entry - { - struct hash_entry *prev, *next; - char *name; - char *str_val; - int int_val; - } ; - -typedef struct hash_entry **hash_table; - -#define NAME_TABLE_HASH_SIZE 101 -#define START_COND_HASH_SIZE 101 -#define CCL_HASH_SIZE 101 - -extern struct hash_entry *ndtbl[NAME_TABLE_HASH_SIZE]; -extern struct hash_entry *sctbl[START_COND_HASH_SIZE]; -extern struct hash_entry *ccltab[CCL_HASH_SIZE]; - - -/* Variables for flags: - * printstats - if true (-v), dump statistics - * syntaxerror - true if a syntax error has been found - * eofseen - true if we've seen an eof in the input file - * ddebug - if true (-d), make a "debug" scanner - * trace - if true (-T), trace processing - * nowarn - if true (-w), do not generate warnings - * spprdflt - if true (-s), suppress the default rule - * interactive - if true (-I), generate an interactive scanner - * caseins - if true (-i), generate a case-insensitive scanner - * lex_compat - if true (-l), maximize compatibility with AT&T lex - * do_yylineno - if true, generate code to maintain yylineno - * useecs - if true (-Ce flag), use equivalence classes - * fulltbl - if true (-Cf flag), don't compress the DFA state table - * usemecs - if true (-Cm flag), use meta-equivalence classes - * fullspd - if true (-F flag), use Jacobson method of table representation - * gen_line_dirs - if true (i.e., no -L flag), generate #line directives - * performance_report - if > 0 (i.e., -p flag), generate a report relating - * to scanner performance; if > 1 (-p -p), report on minor performance - * problems, too - * backing_up_report - if true (i.e., -b flag), generate "lex.backup" file - * listing backing-up states - * C_plus_plus - if true (i.e., -+ flag), generate a C++ scanner class; - * otherwise, a standard C scanner - * long_align - if true (-Ca flag), favor long-word alignment. - * use_read - if true (-f, -F, or -Cr) then use read() for scanner input; - * otherwise, use fread(). - * yytext_is_array - if true (i.e., %array directive), then declare - * yytext as a array instead of a character pointer. Nice and inefficient. - * do_yywrap - do yywrap() processing on EOF. If false, EOF treated as - * "no more files". - * csize - size of character set for the scanner we're generating; - * 128 for 7-bit chars and 256 for 8-bit - * yymore_used - if true, yymore() is used in input rules - * reject - if true, generate back-up tables for REJECT macro - * real_reject - if true, scanner really uses REJECT (as opposed to just - * having "reject" set for variable trailing context) - * continued_action - true if this rule's action is to "fall through" to - * the next rule's action (i.e., the '|' action) - * in_rule - true if we're inside an individual rule, false if not. - * yymore_really_used - whether to treat yymore() as really used, regardless - * of what we think based on references to it in the user's actions. - * reject_really_used - same for REJECT - */ - -extern int printstats, syntaxerror, eofseen, ddebug, trace, nowarn, spprdflt; -extern int interactive, caseins, lex_compat, do_yylineno; -extern int useecs, fulltbl, usemecs, fullspd; -extern int gen_line_dirs, performance_report, backing_up_report; -extern int C_plus_plus, long_align, use_read, yytext_is_array, do_yywrap; -extern int csize; -extern int yymore_used, reject, real_reject, continued_action, in_rule; - -extern int yymore_really_used, reject_really_used; - - -/* Variables used in the flex input routines: - * datapos - characters on current output line - * dataline - number of contiguous lines of data in current data - * statement. Used to generate readable -f output - * linenum - current input line number - * out_linenum - current output line number - * skelfile - the skeleton file - * skel - compiled-in skeleton array - * skel_ind - index into "skel" array, if skelfile is nil - * yyin - input file - * backing_up_file - file to summarize backing-up states to - * infilename - name of input file - * outfilename - name of output file - * did_outfilename - whether outfilename was explicitly set - * prefix - the prefix used for externally visible names ("yy" by default) - * yyclass - yyFlexLexer subclass to use for YY_DECL - * do_stdinit - whether to initialize yyin/yyout to stdin/stdout - * use_stdout - the -t flag - * input_files - array holding names of input files - * num_input_files - size of input_files array - * program_name - name with which program was invoked - * - * action_array - array to hold the rule actions - * action_size - size of action_array - * defs1_offset - index where the user's section 1 definitions start - * in action_array - * prolog_offset - index where the prolog starts in action_array - * action_offset - index where the non-prolog starts in action_array - * action_index - index where the next action should go, with respect - * to "action_array" - */ - -extern int datapos, dataline, linenum, out_linenum; -extern FILE *skelfile, *yyin, *backing_up_file; -extern const char *skel[]; -extern int skel_ind; -extern char *infilename, *outfilename; -extern int did_outfilename; -extern char *prefix, *yyclass; -extern int do_stdinit, use_stdout; -extern char **input_files; -extern int num_input_files; -extern char *program_name; - -extern char *action_array; -extern int action_size; -extern int defs1_offset, prolog_offset, action_offset, action_index; - - -/* Variables for stack of states having only one out-transition: - * onestate - state number - * onesym - transition symbol - * onenext - target state - * onedef - default base entry - * onesp - stack pointer - */ - -extern int onestate[ONE_STACK_SIZE], onesym[ONE_STACK_SIZE]; -extern int onenext[ONE_STACK_SIZE], onedef[ONE_STACK_SIZE], onesp; - - -/* Variables for nfa machine data: - * current_mns - current maximum on number of NFA states - * num_rules - number of the last accepting state; also is number of - * rules created so far - * num_eof_rules - number of <> rules - * default_rule - number of the default rule - * current_max_rules - current maximum number of rules - * lastnfa - last nfa state number created - * firstst - physically the first state of a fragment - * lastst - last physical state of fragment - * finalst - last logical state of fragment - * transchar - transition character - * trans1 - transition state - * trans2 - 2nd transition state for epsilons - * accptnum - accepting number - * assoc_rule - rule associated with this NFA state (or 0 if none) - * state_type - a STATE_xxx type identifying whether the state is part - * of a normal rule, the leading state in a trailing context - * rule (i.e., the state which marks the transition from - * recognizing the text-to-be-matched to the beginning of - * the trailing context), or a subsequent state in a trailing - * context rule - * rule_type - a RULE_xxx type identifying whether this a ho-hum - * normal rule or one which has variable head & trailing - * context - * rule_linenum - line number associated with rule - * rule_useful - true if we've determined that the rule can be matched - */ - -extern int current_mns, current_max_rules; -extern int num_rules, num_eof_rules, default_rule, lastnfa; -extern int *firstst, *lastst, *finalst, *transchar, *trans1, *trans2; -extern int *accptnum, *assoc_rule, *state_type; -extern int *rule_type, *rule_linenum, *rule_useful; - -/* Different types of states; values are useful as masks, as well, for - * routines like check_trailing_context(). - */ -#define STATE_NORMAL 0x1 -#define STATE_TRAILING_CONTEXT 0x2 - -/* Global holding current type of state we're making. */ - -extern int current_state_type; - -/* Different types of rules. */ -#define RULE_NORMAL 0 -#define RULE_VARIABLE 1 - -/* True if the input rules include a rule with both variable-length head - * and trailing context, false otherwise. - */ -extern int variable_trailing_context_rules; - - -/* Variables for protos: - * numtemps - number of templates created - * numprots - number of protos created - * protprev - backlink to a more-recently used proto - * protnext - forward link to a less-recently used proto - * prottbl - base/def table entry for proto - * protcomst - common state of proto - * firstprot - number of the most recently used proto - * lastprot - number of the least recently used proto - * protsave contains the entire state array for protos - */ - -extern int numtemps, numprots, protprev[MSP], protnext[MSP], prottbl[MSP]; -extern int protcomst[MSP], firstprot, lastprot, protsave[PROT_SAVE_SIZE]; - - -/* Variables for managing equivalence classes: - * numecs - number of equivalence classes - * nextecm - forward link of Equivalence Class members - * ecgroup - class number or backward link of EC members - * nummecs - number of meta-equivalence classes (used to compress - * templates) - * tecfwd - forward link of meta-equivalence classes members - * tecbck - backward link of MEC's - */ - -/* Reserve enough room in the equivalence class arrays so that we - * can use the CSIZE'th element to hold equivalence class information - * for the NUL character. Later we'll move this information into - * the 0th element. - */ -extern int numecs, nextecm[CSIZE + 1], ecgroup[CSIZE + 1], nummecs; - -/* Meta-equivalence classes are indexed starting at 1, so it's possible - * that they will require positions from 1 .. CSIZE, i.e., CSIZE + 1 - * slots total (since the arrays are 0-based). nextecm[] and ecgroup[] - * don't require the extra position since they're indexed from 1 .. CSIZE - 1. - */ -extern int tecfwd[CSIZE + 1], tecbck[CSIZE + 1]; - - -/* Variables for start conditions: - * lastsc - last start condition created - * current_max_scs - current limit on number of start conditions - * scset - set of rules active in start condition - * scbol - set of rules active only at the beginning of line in a s.c. - * scxclu - true if start condition is exclusive - * sceof - true if start condition has EOF rule - * scname - start condition name - */ - -extern int lastsc, *scset, *scbol, *scxclu, *sceof; -extern int current_max_scs; -extern char **scname; - - -/* Variables for dfa machine data: - * current_max_dfa_size - current maximum number of NFA states in DFA - * current_max_xpairs - current maximum number of non-template xtion pairs - * current_max_template_xpairs - current maximum number of template pairs - * current_max_dfas - current maximum number DFA states - * lastdfa - last dfa state number created - * nxt - state to enter upon reading character - * chk - check value to see if "nxt" applies - * tnxt - internal nxt table for templates - * base - offset into "nxt" for given state - * def - where to go if "chk" disallows "nxt" entry - * nultrans - NUL transition for each state - * NUL_ec - equivalence class of the NUL character - * tblend - last "nxt/chk" table entry being used - * firstfree - first empty entry in "nxt/chk" table - * dss - nfa state set for each dfa - * dfasiz - size of nfa state set for each dfa - * dfaacc - accepting set for each dfa state (if using REJECT), or accepting - * number, if not - * accsiz - size of accepting set for each dfa state - * dhash - dfa state hash value - * numas - number of DFA accepting states created; note that this - * is not necessarily the same value as num_rules, which is the analogous - * value for the NFA - * numsnpairs - number of state/nextstate transition pairs - * jambase - position in base/def where the default jam table starts - * jamstate - state number corresponding to "jam" state - * end_of_buffer_state - end-of-buffer dfa state number - */ - -extern int current_max_dfa_size, current_max_xpairs; -extern int current_max_template_xpairs, current_max_dfas; -extern int lastdfa, *nxt, *chk, *tnxt; -extern int *base, *def, *nultrans, NUL_ec, tblend, firstfree, **dss, *dfasiz; -extern union dfaacc_union - { - int *dfaacc_set; - int dfaacc_state; - } *dfaacc; -extern int *accsiz, *dhash, numas; -extern int numsnpairs, jambase, jamstate; -extern int end_of_buffer_state; - -/* Variables for ccl information: - * lastccl - ccl index of the last created ccl - * current_maxccls - current limit on the maximum number of unique ccl's - * cclmap - maps a ccl index to its set pointer - * ccllen - gives the length of a ccl - * cclng - true for a given ccl if the ccl is negated - * cclreuse - counts how many times a ccl is re-used - * current_max_ccl_tbl_size - current limit on number of characters needed - * to represent the unique ccl's - * ccltbl - holds the characters in each ccl - indexed by cclmap - */ - -extern int lastccl, *cclmap, *ccllen, *cclng, cclreuse; -extern int current_maxccls, current_max_ccl_tbl_size; -extern Char *ccltbl; - - -/* Variables for miscellaneous information: - * nmstr - last NAME scanned by the scanner - * sectnum - section number currently being parsed - * nummt - number of empty nxt/chk table entries - * hshcol - number of hash collisions detected by snstods - * dfaeql - number of times a newly created dfa was equal to an old one - * numeps - number of epsilon NFA states created - * eps2 - number of epsilon states which have 2 out-transitions - * num_reallocs - number of times it was necessary to realloc() a group - * of arrays - * tmpuses - number of DFA states that chain to templates - * totnst - total number of NFA states used to make DFA states - * peakpairs - peak number of transition pairs we had to store internally - * numuniq - number of unique transitions - * numdup - number of duplicate transitions - * hshsave - number of hash collisions saved by checking number of states - * num_backing_up - number of DFA states requiring backing up - * bol_needed - whether scanner needs beginning-of-line recognition - */ - -extern char nmstr[MAXLINE]; -extern int sectnum, nummt, hshcol, dfaeql, numeps, eps2, num_reallocs; -extern int tmpuses, totnst, peakpairs, numuniq, numdup, hshsave; -extern int num_backing_up, bol_needed; - -void *allocate_array PROTO((int, size_t)); -void *reallocate_array PROTO((void*, int, size_t)); - -void *flex_alloc PROTO((size_t)); -void *flex_realloc PROTO((void*, size_t)); -void flex_free PROTO((void*)); - -#define allocate_integer_array(size) \ - (int *) allocate_array( size, sizeof( int ) ) - -#define reallocate_integer_array(array,size) \ - (int *) reallocate_array( (void *) array, size, sizeof( int ) ) - -#define allocate_int_ptr_array(size) \ - (int **) allocate_array( size, sizeof( int * ) ) - -#define allocate_char_ptr_array(size) \ - (char **) allocate_array( size, sizeof( char * ) ) - -#define allocate_dfaacc_union(size) \ - (union dfaacc_union *) \ - allocate_array( size, sizeof( union dfaacc_union ) ) - -#define reallocate_int_ptr_array(array,size) \ - (int **) reallocate_array( (void *) array, size, sizeof( int * ) ) - -#define reallocate_char_ptr_array(array,size) \ - (char **) reallocate_array( (void *) array, size, sizeof( char * ) ) - -#define reallocate_dfaacc_union(array, size) \ - (union dfaacc_union *) \ - reallocate_array( (void *) array, size, sizeof( union dfaacc_union ) ) - -#define allocate_character_array(size) \ - (char *) allocate_array( size, sizeof( char ) ) - -#define reallocate_character_array(array,size) \ - (char *) reallocate_array( (void *) array, size, sizeof( char ) ) - -#define allocate_Character_array(size) \ - (Char *) allocate_array( size, sizeof( Char ) ) - -#define reallocate_Character_array(array,size) \ - (Char *) reallocate_array( (void *) array, size, sizeof( Char ) ) - - -/* Used to communicate between scanner and parser. The type should really - * be YYSTYPE, but we can't easily get our hands on it. - */ -extern int yylval; - - -/* External functions that are cross-referenced among the flex source files. */ - - -/* from file ccl.c */ - -extern void ccladd PROTO((int, int)); /* add a single character to a ccl */ -extern int cclinit PROTO((void)); /* make an empty ccl */ -extern void cclnegate PROTO((int)); /* negate a ccl */ - -/* List the members of a set of characters in CCL form. */ -extern void list_character_set PROTO((FILE*, int[])); - - -/* from file dfa.c */ - -/* Check a DFA state for backing up. */ -extern void check_for_backing_up PROTO((int, int[])); - -/* Check to see if NFA state set constitutes "dangerous" trailing context. */ -extern void check_trailing_context PROTO((int*, int, int*, int)); - -/* Construct the epsilon closure of a set of ndfa states. */ -extern int *epsclosure PROTO((int*, int*, int[], int*, int*)); - -/* Increase the maximum number of dfas. */ -extern void increase_max_dfas PROTO((void)); - -extern void ntod PROTO((void)); /* convert a ndfa to a dfa */ - -/* Converts a set of ndfa states into a dfa state. */ -extern int snstods PROTO((int[], int, int[], int, int, int*)); - - -/* from file ecs.c */ - -/* Convert character classes to set of equivalence classes. */ -extern void ccl2ecl PROTO((void)); - -/* Associate equivalence class numbers with class members. */ -extern int cre8ecs PROTO((int[], int[], int)); - -/* Update equivalence classes based on character class transitions. */ -extern void mkeccl PROTO((Char[], int, int[], int[], int, int)); - -/* Create equivalence class for single character. */ -extern void mkechar PROTO((int, int[], int[])); - - -/* from file gen.c */ - -extern void do_indent PROTO((void)); /* indent to the current level */ - -/* Generate the code to keep backing-up information. */ -extern void gen_backing_up PROTO((void)); - -/* Generate the code to perform the backing up. */ -extern void gen_bu_action PROTO((void)); - -/* Generate full speed compressed transition table. */ -extern void genctbl PROTO((void)); - -/* Generate the code to find the action number. */ -extern void gen_find_action PROTO((void)); - -extern void genftbl PROTO((void)); /* generate full transition table */ - -/* Generate the code to find the next compressed-table state. */ -extern void gen_next_compressed_state PROTO((char*)); - -/* Generate the code to find the next match. */ -extern void gen_next_match PROTO((void)); - -/* Generate the code to find the next state. */ -extern void gen_next_state PROTO((int)); - -/* Generate the code to make a NUL transition. */ -extern void gen_NUL_trans PROTO((void)); - -/* Generate the code to find the start state. */ -extern void gen_start_state PROTO((void)); - -/* Generate data statements for the transition tables. */ -extern void gentabs PROTO((void)); - -/* Write out a formatted string at the current indentation level. */ -extern void indent_put2s PROTO((char[], char[])); - -/* Write out a string + newline at the current indentation level. */ -extern void indent_puts PROTO((char[])); - -extern void make_tables PROTO((void)); /* generate transition tables */ - - -/* from file main.c */ - -extern void check_options PROTO((void)); -extern void flexend PROTO((int)); -extern void usage PROTO((void)); - - -/* from file misc.c */ - -/* Add a #define to the action file. */ -extern void action_define PROTO(( char *defname, int value )); - -/* Add the given text to the stored actions. */ -extern void add_action PROTO(( char *new_text )); - -/* True if a string is all lower case. */ -extern int all_lower PROTO((register char *)); - -/* True if a string is all upper case. */ -extern int all_upper PROTO((register char *)); - -/* Bubble sort an integer array. */ -extern void bubble PROTO((int [], int)); - -/* Check a character to make sure it's in the expected range. */ -extern void check_char PROTO((int c)); - -/* Replace upper-case letter to lower-case. */ -extern Char clower PROTO((int)); - -/* Returns a dynamically allocated copy of a string. */ -extern char *copy_string PROTO((register const char *)); - -/* Returns a dynamically allocated copy of a (potentially) unsigned string. */ -extern Char *copy_unsigned_string PROTO((register Char *)); - -/* Shell sort a character array. */ -extern void cshell PROTO((Char [], int, int)); - -/* Finish up a block of data declarations. */ -extern void dataend PROTO((void)); - -/* Flush generated data statements. */ -extern void dataflush PROTO((void)); - -/* Report an error message and terminate. */ -extern void flexerror PROTO((const char[])); - -/* Report a fatal error message and terminate. */ -extern void flexfatal PROTO((const char[])); - -/* Convert a hexadecimal digit string to an integer value. */ -extern int htoi PROTO((Char[])); - -/* Report an error message formatted with one integer argument. */ -extern void lerrif PROTO((const char[], int)); - -/* Report an error message formatted with one string argument. */ -extern void lerrsf PROTO((const char[], const char[])); - -/* Spit out a "#line" statement. */ -extern void line_directive_out PROTO((FILE*, int)); - -/* Mark the current position in the action array as the end of the section 1 - * user defs. - */ -extern void mark_defs1 PROTO((void)); - -/* Mark the current position in the action array as the end of the prolog. */ -extern void mark_prolog PROTO((void)); - -/* Generate a data statment for a two-dimensional array. */ -extern void mk2data PROTO((int)); - -extern void mkdata PROTO((int)); /* generate a data statement */ - -/* Return the integer represented by a string of digits. */ -extern int myctoi PROTO((char [])); - -/* Return character corresponding to escape sequence. */ -extern Char myesc PROTO((Char[])); - -/* Convert an octal digit string to an integer value. */ -extern int otoi PROTO((Char [] )); - -/* Output a (possibly-formatted) string to the generated scanner. */ -extern void out PROTO((const char [])); -extern void out_dec PROTO((const char [], int)); -extern void out_dec2 PROTO((const char [], int, int)); -extern void out_hex PROTO((const char [], unsigned int)); -extern void out_line_count PROTO((const char [])); -extern void out_str PROTO((const char [], const char [])); -extern void out_str3 - PROTO((const char [], const char [], const char [], const char [])); -extern void out_str_dec PROTO((const char [], const char [], int)); -extern void outc PROTO((int)); -extern void outn PROTO((const char [])); - -/* Return a printable version of the given character, which might be - * 8-bit. - */ -extern char *readable_form PROTO((int)); - -/* Write out one section of the skeleton file. */ -extern void skelout PROTO((void)); - -/* Output a yy_trans_info structure. */ -extern void transition_struct_out PROTO((int, int)); - -/* Only needed when using certain broken versions of bison to build parse.c. */ -extern void *yy_flex_xmalloc PROTO(( int )); - -/* Set a region of memory to 0. */ -extern void zero_out PROTO((char *, size_t)); - - -/* from file nfa.c */ - -/* Add an accepting state to a machine. */ -extern void add_accept PROTO((int, int)); - -/* Make a given number of copies of a singleton machine. */ -extern int copysingl PROTO((int, int)); - -/* Debugging routine to write out an nfa. */ -extern void dumpnfa PROTO((int)); - -/* Finish up the processing for a rule. */ -extern void finish_rule PROTO((int, int, int, int)); - -/* Connect two machines together. */ -extern int link_machines PROTO((int, int)); - -/* Mark each "beginning" state in a machine as being a "normal" (i.e., - * not trailing context associated) state. - */ -extern void mark_beginning_as_normal PROTO((register int)); - -/* Make a machine that branches to two machines. */ -extern int mkbranch PROTO((int, int)); - -extern int mkclos PROTO((int)); /* convert a machine into a closure */ -extern int mkopt PROTO((int)); /* make a machine optional */ - -/* Make a machine that matches either one of two machines. */ -extern int mkor PROTO((int, int)); - -/* Convert a machine into a positive closure. */ -extern int mkposcl PROTO((int)); - -extern int mkrep PROTO((int, int, int)); /* make a replicated machine */ - -/* Create a state with a transition on a given symbol. */ -extern int mkstate PROTO((int)); - -extern void new_rule PROTO((void)); /* initialize for a new rule */ - - -/* from file parse.y */ - -/* Build the "<>" action for the active start conditions. */ -extern void build_eof_action PROTO((void)); - -/* Write out a message formatted with one string, pinpointing its location. */ -extern void format_pinpoint_message PROTO((char[], char[])); - -/* Write out a message, pinpointing its location. */ -extern void pinpoint_message PROTO((char[])); - -/* Write out a warning, pinpointing it at the given line. */ -extern void line_warning PROTO(( char[], int )); - -/* Write out a message, pinpointing it at the given line. */ -extern void line_pinpoint PROTO(( char[], int )); - -/* Report a formatted syntax error. */ -extern void format_synerr PROTO((char [], char[])); -extern void synerr PROTO((char [])); /* report a syntax error */ -extern void format_warn PROTO((char [], char[])); -extern void warn PROTO((char [])); /* report a warning */ -extern void yyerror PROTO((char [])); /* report a parse error */ -extern int yyparse PROTO((void)); /* the YACC parser */ - - -/* from file scan.l */ - -/* The Flex-generated scanner for flex. */ -extern int flexscan PROTO((void)); - -/* Open the given file (if NULL, stdin) for scanning. */ -extern void set_input_file PROTO((char*)); - -/* Wrapup a file in the lexical analyzer. */ -extern int yywrap PROTO((void)); - - -/* from file sym.c */ - -/* Add symbol and definitions to symbol table. */ -extern int addsym PROTO((register char[], char*, int, hash_table, int)); - -/* Save the text of a character class. */ -extern void cclinstal PROTO ((Char [], int)); - -/* Lookup the number associated with character class. */ -extern int ccllookup PROTO((Char [])); - -/* Find symbol in symbol table. */ -extern struct hash_entry *findsym PROTO((register char[], hash_table, int )); - -extern void ndinstal PROTO((char[], Char[])); /* install a name definition */ -extern Char *ndlookup PROTO((char[])); /* lookup a name definition */ - -/* Increase maximum number of SC's. */ -extern void scextend PROTO((void)); -extern void scinstal PROTO((char[], int)); /* make a start condition */ - -/* Lookup the number associated with a start condition. */ -extern int sclookup PROTO((char[])); - - -/* from file tblcmp.c */ - -/* Build table entries for dfa state. */ -extern void bldtbl PROTO((int[], int, int, int, int)); - -extern void cmptmps PROTO((void)); /* compress template table entries */ -extern void expand_nxt_chk PROTO((void)); /* increase nxt/chk arrays */ -/* Finds a space in the table for a state to be placed. */ -extern int find_table_space PROTO((int*, int)); -extern void inittbl PROTO((void)); /* initialize transition tables */ -/* Make the default, "jam" table entries. */ -extern void mkdeftbl PROTO((void)); - -/* Create table entries for a state (or state fragment) which has - * only one out-transition. - */ -extern void mk1tbl PROTO((int, int, int, int)); - -/* Place a state into full speed transition table. */ -extern void place_state PROTO((int*, int, int)); - -/* Save states with only one out-transition to be processed later. */ -extern void stack1 PROTO((int, int, int, int)); - - -/* from file yylex.c */ - -extern int yylex PROTO((void)); diff --git a/commands/flex-2.5.4/gen.c b/commands/flex-2.5.4/gen.c deleted file mode 100644 index 545671e25..000000000 --- a/commands/flex-2.5.4/gen.c +++ /dev/null @@ -1,1625 +0,0 @@ -/* gen - actual generation (writing) of flex scanners */ - -/*- - * Copyright (c) 1990 The Regents of the University of California. - * All rights reserved. - * - * This code is derived from software contributed to Berkeley by - * Vern Paxson. - * - * The United States Government has rights in this work pursuant - * to contract no. DE-AC03-76SF00098 between the United States - * Department of Energy and the University of California. - * - * Redistribution and use in source and binary forms with or without - * modification are permitted provided that: (1) source distributions retain - * this entire copyright notice and comment, and (2) distributions including - * binaries display the following acknowledgement: ``This product includes - * software developed by the University of California, Berkeley and its - * contributors'' in the documentation or other materials provided with the - * distribution and in all advertising materials mentioning features or use - * of this software. Neither the name of the University nor the names of - * its contributors may be used to endorse or promote products derived from - * this software without specific prior written permission. - * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED - * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF - * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. - */ - -/* $Header$ */ - -#include "flexdef.h" - - -/* declare functions that have forward references */ - -void gen_next_state PROTO((int)); -void genecs PROTO((void)); -void indent_put2s PROTO((char [], char [])); -void indent_puts PROTO((char [])); - - -static int indent_level = 0; /* each level is 8 spaces */ - -#define indent_up() (++indent_level) -#define indent_down() (--indent_level) -#define set_indent(indent_val) indent_level = indent_val - -/* Almost everything is done in terms of arrays starting at 1, so provide - * a null entry for the zero element of all C arrays. (The exception - * to this is that the fast table representation generally uses the - * 0 elements of its arrays, too.) - */ -static char C_int_decl[] = "static yyconst int %s[%d] =\n { 0,\n"; -static char C_short_decl[] = "static yyconst short int %s[%d] =\n { 0,\n"; -static char C_long_decl[] = "static yyconst long int %s[%d] =\n { 0,\n"; -static char C_state_decl[] = - "static yyconst yy_state_type %s[%d] =\n { 0,\n"; - - -/* Indent to the current level. */ - -void do_indent() - { - register int i = indent_level * 8; - - while ( i >= 8 ) - { - outc( '\t' ); - i -= 8; - } - - while ( i > 0 ) - { - outc( ' ' ); - --i; - } - } - - -/* Generate the code to keep backing-up information. */ - -void gen_backing_up() - { - if ( reject || num_backing_up == 0 ) - return; - - if ( fullspd ) - indent_puts( "if ( yy_current_state[-1].yy_nxt )" ); - else - indent_puts( "if ( yy_accept[yy_current_state] )" ); - - indent_up(); - indent_puts( "{" ); - indent_puts( "yy_last_accepting_state = yy_current_state;" ); - indent_puts( "yy_last_accepting_cpos = yy_cp;" ); - indent_puts( "}" ); - indent_down(); - } - - -/* Generate the code to perform the backing up. */ - -void gen_bu_action() - { - if ( reject || num_backing_up == 0 ) - return; - - set_indent( 3 ); - - indent_puts( "case 0: /* must back up */" ); - indent_puts( "/* undo the effects of YY_DO_BEFORE_ACTION */" ); - indent_puts( "*yy_cp = yy_hold_char;" ); - - if ( fullspd || fulltbl ) - indent_puts( "yy_cp = yy_last_accepting_cpos + 1;" ); - else - /* Backing-up info for compressed tables is taken \after/ - * yy_cp has been incremented for the next state. - */ - indent_puts( "yy_cp = yy_last_accepting_cpos;" ); - - indent_puts( "yy_current_state = yy_last_accepting_state;" ); - indent_puts( "goto yy_find_action;" ); - outc( '\n' ); - - set_indent( 0 ); - } - - -/* genctbl - generates full speed compressed transition table */ - -void genctbl() - { - register int i; - int end_of_buffer_action = num_rules + 1; - - /* Table of verify for transition and offset to next state. */ - out_dec( "static yyconst struct yy_trans_info yy_transition[%d] =\n", - tblend + numecs + 1 ); - outn( " {" ); - - /* We want the transition to be represented as the offset to the - * next state, not the actual state number, which is what it currently - * is. The offset is base[nxt[i]] - (base of current state)]. That's - * just the difference between the starting points of the two involved - * states (to - from). - * - * First, though, we need to find some way to put in our end-of-buffer - * flags and states. We do this by making a state with absolutely no - * transitions. We put it at the end of the table. - */ - - /* We need to have room in nxt/chk for two more slots: One for the - * action and one for the end-of-buffer transition. We now *assume* - * that we're guaranteed the only character we'll try to index this - * nxt/chk pair with is EOB, i.e., 0, so we don't have to make sure - * there's room for jam entries for other characters. - */ - - while ( tblend + 2 >= current_max_xpairs ) - expand_nxt_chk(); - - while ( lastdfa + 1 >= current_max_dfas ) - increase_max_dfas(); - - base[lastdfa + 1] = tblend + 2; - nxt[tblend + 1] = end_of_buffer_action; - chk[tblend + 1] = numecs + 1; - chk[tblend + 2] = 1; /* anything but EOB */ - - /* So that "make test" won't show arb. differences. */ - nxt[tblend + 2] = 0; - - /* Make sure every state has an end-of-buffer transition and an - * action #. - */ - for ( i = 0; i <= lastdfa; ++i ) - { - int anum = dfaacc[i].dfaacc_state; - int offset = base[i]; - - chk[offset] = EOB_POSITION; - chk[offset - 1] = ACTION_POSITION; - nxt[offset - 1] = anum; /* action number */ - } - - for ( i = 0; i <= tblend; ++i ) - { - if ( chk[i] == EOB_POSITION ) - transition_struct_out( 0, base[lastdfa + 1] - i ); - - else if ( chk[i] == ACTION_POSITION ) - transition_struct_out( 0, nxt[i] ); - - else if ( chk[i] > numecs || chk[i] == 0 ) - transition_struct_out( 0, 0 ); /* unused slot */ - - else /* verify, transition */ - transition_struct_out( chk[i], - base[nxt[i]] - (i - chk[i]) ); - } - - - /* Here's the final, end-of-buffer state. */ - transition_struct_out( chk[tblend + 1], nxt[tblend + 1] ); - transition_struct_out( chk[tblend + 2], nxt[tblend + 2] ); - - outn( " };\n" ); - - /* Table of pointers to start states. */ - out_dec( - "static yyconst struct yy_trans_info *yy_start_state_list[%d] =\n", - lastsc * 2 + 1 ); - outn( " {" ); /* } so vi doesn't get confused */ - - for ( i = 0; i <= lastsc * 2; ++i ) - out_dec( " &yy_transition[%d],\n", base[i] ); - - dataend(); - - if ( useecs ) - genecs(); - } - - -/* Generate equivalence-class tables. */ - -void genecs() - { - register int i, j; - int numrows; - - out_str_dec( C_int_decl, "yy_ec", csize ); - - for ( i = 1; i < csize; ++i ) - { - if ( caseins && (i >= 'A') && (i <= 'Z') ) - ecgroup[i] = ecgroup[clower( i )]; - - ecgroup[i] = ABS( ecgroup[i] ); - mkdata( ecgroup[i] ); - } - - dataend(); - - if ( trace ) - { - fputs( _( "\n\nEquivalence Classes:\n\n" ), stderr ); - - numrows = csize / 8; - - for ( j = 0; j < numrows; ++j ) - { - for ( i = j; i < csize; i = i + numrows ) - { - fprintf( stderr, "%4s = %-2d", - readable_form( i ), ecgroup[i] ); - - putc( ' ', stderr ); - } - - putc( '\n', stderr ); - } - } - } - - -/* Generate the code to find the action number. */ - -void gen_find_action() - { - if ( fullspd ) - indent_puts( "yy_act = yy_current_state[-1].yy_nxt;" ); - - else if ( fulltbl ) - indent_puts( "yy_act = yy_accept[yy_current_state];" ); - - else if ( reject ) - { - indent_puts( "yy_current_state = *--yy_state_ptr;" ); - indent_puts( "yy_lp = yy_accept[yy_current_state];" ); - - outn( - "find_rule: /* we branch to this label when backing up */" ); - - indent_puts( - "for ( ; ; ) /* until we find what rule we matched */" ); - - indent_up(); - - indent_puts( "{" ); - - indent_puts( - "if ( yy_lp && yy_lp < yy_accept[yy_current_state + 1] )" ); - indent_up(); - indent_puts( "{" ); - indent_puts( "yy_act = yy_acclist[yy_lp];" ); - - if ( variable_trailing_context_rules ) - { - indent_puts( "if ( yy_act & YY_TRAILING_HEAD_MASK ||" ); - indent_puts( " yy_looking_for_trail_begin )" ); - indent_up(); - indent_puts( "{" ); - - indent_puts( - "if ( yy_act == yy_looking_for_trail_begin )" ); - indent_up(); - indent_puts( "{" ); - indent_puts( "yy_looking_for_trail_begin = 0;" ); - indent_puts( "yy_act &= ~YY_TRAILING_HEAD_MASK;" ); - indent_puts( "break;" ); - indent_puts( "}" ); - indent_down(); - - indent_puts( "}" ); - indent_down(); - - indent_puts( "else if ( yy_act & YY_TRAILING_MASK )" ); - indent_up(); - indent_puts( "{" ); - indent_puts( - "yy_looking_for_trail_begin = yy_act & ~YY_TRAILING_MASK;" ); - indent_puts( - "yy_looking_for_trail_begin |= YY_TRAILING_HEAD_MASK;" ); - - if ( real_reject ) - { - /* Remember matched text in case we back up - * due to REJECT. - */ - indent_puts( "yy_full_match = yy_cp;" ); - indent_puts( "yy_full_state = yy_state_ptr;" ); - indent_puts( "yy_full_lp = yy_lp;" ); - } - - indent_puts( "}" ); - indent_down(); - - indent_puts( "else" ); - indent_up(); - indent_puts( "{" ); - indent_puts( "yy_full_match = yy_cp;" ); - indent_puts( "yy_full_state = yy_state_ptr;" ); - indent_puts( "yy_full_lp = yy_lp;" ); - indent_puts( "break;" ); - indent_puts( "}" ); - indent_down(); - - indent_puts( "++yy_lp;" ); - indent_puts( "goto find_rule;" ); - } - - else - { - /* Remember matched text in case we back up due to - * trailing context plus REJECT. - */ - indent_up(); - indent_puts( "{" ); - indent_puts( "yy_full_match = yy_cp;" ); - indent_puts( "break;" ); - indent_puts( "}" ); - indent_down(); - } - - indent_puts( "}" ); - indent_down(); - - indent_puts( "--yy_cp;" ); - - /* We could consolidate the following two lines with those at - * the beginning, but at the cost of complaints that we're - * branching inside a loop. - */ - indent_puts( "yy_current_state = *--yy_state_ptr;" ); - indent_puts( "yy_lp = yy_accept[yy_current_state];" ); - - indent_puts( "}" ); - - indent_down(); - } - - else - { /* compressed */ - indent_puts( "yy_act = yy_accept[yy_current_state];" ); - - if ( interactive && ! reject ) - { - /* Do the guaranteed-needed backing up to figure out - * the match. - */ - indent_puts( "if ( yy_act == 0 )" ); - indent_up(); - indent_puts( "{ /* have to back up */" ); - indent_puts( "yy_cp = yy_last_accepting_cpos;" ); - indent_puts( - "yy_current_state = yy_last_accepting_state;" ); - indent_puts( "yy_act = yy_accept[yy_current_state];" ); - indent_puts( "}" ); - indent_down(); - } - } - } - - -/* genftbl - generate full transition table */ - -void genftbl() - { - register int i; - int end_of_buffer_action = num_rules + 1; - - out_str_dec( long_align ? C_long_decl : C_short_decl, - "yy_accept", lastdfa + 1 ); - - dfaacc[end_of_buffer_state].dfaacc_state = end_of_buffer_action; - - for ( i = 1; i <= lastdfa; ++i ) - { - register int anum = dfaacc[i].dfaacc_state; - - mkdata( anum ); - - if ( trace && anum ) - fprintf( stderr, _( "state # %d accepts: [%d]\n" ), - i, anum ); - } - - dataend(); - - if ( useecs ) - genecs(); - - /* Don't have to dump the actual full table entries - they were - * created on-the-fly. - */ - } - - -/* Generate the code to find the next compressed-table state. */ - -void gen_next_compressed_state( char_map ) -char *char_map; - { - indent_put2s( "register YY_CHAR yy_c = %s;", char_map ); - - /* Save the backing-up info \before/ computing the next state - * because we always compute one more state than needed - we - * always proceed until we reach a jam state - */ - gen_backing_up(); - - indent_puts( -"while ( yy_chk[yy_base[yy_current_state] + yy_c] != yy_current_state )" ); - indent_up(); - indent_puts( "{" ); - indent_puts( "yy_current_state = (int) yy_def[yy_current_state];" ); - - if ( usemecs ) - { - /* We've arrange it so that templates are never chained - * to one another. This means we can afford to make a - * very simple test to see if we need to convert to - * yy_c's meta-equivalence class without worrying - * about erroneously looking up the meta-equivalence - * class twice - */ - do_indent(); - - /* lastdfa + 2 is the beginning of the templates */ - out_dec( "if ( yy_current_state >= %d )\n", lastdfa + 2 ); - - indent_up(); - indent_puts( "yy_c = yy_meta[(unsigned int) yy_c];" ); - indent_down(); - } - - indent_puts( "}" ); - indent_down(); - - indent_puts( -"yy_current_state = yy_nxt[yy_base[yy_current_state] + (unsigned int) yy_c];" ); - } - - -/* Generate the code to find the next match. */ - -void gen_next_match() - { - /* NOTE - changes in here should be reflected in gen_next_state() and - * gen_NUL_trans(). - */ - char *char_map = useecs ? - "yy_ec[YY_SC_TO_UI(*yy_cp)]" : - "YY_SC_TO_UI(*yy_cp)"; - - char *char_map_2 = useecs ? - "yy_ec[YY_SC_TO_UI(*++yy_cp)]" : - "YY_SC_TO_UI(*++yy_cp)"; - - if ( fulltbl ) - { - indent_put2s( - "while ( (yy_current_state = yy_nxt[yy_current_state][%s]) > 0 )", - char_map ); - - indent_up(); - - if ( num_backing_up > 0 ) - { - indent_puts( "{" ); /* } for vi */ - gen_backing_up(); - outc( '\n' ); - } - - indent_puts( "++yy_cp;" ); - - if ( num_backing_up > 0 ) - /* { for vi */ - indent_puts( "}" ); - - indent_down(); - - outc( '\n' ); - indent_puts( "yy_current_state = -yy_current_state;" ); - } - - else if ( fullspd ) - { - indent_puts( "{" ); /* } for vi */ - indent_puts( - "register yyconst struct yy_trans_info *yy_trans_info;\n" ); - indent_puts( "register YY_CHAR yy_c;\n" ); - indent_put2s( "for ( yy_c = %s;", char_map ); - indent_puts( - " (yy_trans_info = &yy_current_state[(unsigned int) yy_c])->" ); - indent_puts( "yy_verify == yy_c;" ); - indent_put2s( " yy_c = %s )", char_map_2 ); - - indent_up(); - - if ( num_backing_up > 0 ) - indent_puts( "{" ); /* } for vi */ - - indent_puts( "yy_current_state += yy_trans_info->yy_nxt;" ); - - if ( num_backing_up > 0 ) - { - outc( '\n' ); - gen_backing_up(); /* { for vi */ - indent_puts( "}" ); - } - - indent_down(); /* { for vi */ - indent_puts( "}" ); - } - - else - { /* compressed */ - indent_puts( "do" ); - - indent_up(); - indent_puts( "{" ); /* } for vi */ - - gen_next_state( false ); - - indent_puts( "++yy_cp;" ); - - /* { for vi */ - indent_puts( "}" ); - indent_down(); - - do_indent(); - - if ( interactive ) - out_dec( "while ( yy_base[yy_current_state] != %d );\n", - jambase ); - else - out_dec( "while ( yy_current_state != %d );\n", - jamstate ); - - if ( ! reject && ! interactive ) - { - /* Do the guaranteed-needed backing up to figure out - * the match. - */ - indent_puts( "yy_cp = yy_last_accepting_cpos;" ); - indent_puts( - "yy_current_state = yy_last_accepting_state;" ); - } - } - } - - -/* Generate the code to find the next state. */ - -void gen_next_state( worry_about_NULs ) -int worry_about_NULs; - { /* NOTE - changes in here should be reflected in gen_next_match() */ - char char_map[256]; - - if ( worry_about_NULs && ! nultrans ) - { - if ( useecs ) - (void) sprintf( char_map, - "(*yy_cp ? yy_ec[YY_SC_TO_UI(*yy_cp)] : %d)", - NUL_ec ); - else - (void) sprintf( char_map, - "(*yy_cp ? YY_SC_TO_UI(*yy_cp) : %d)", NUL_ec ); - } - - else - strcpy( char_map, useecs ? - "yy_ec[YY_SC_TO_UI(*yy_cp)]" : "YY_SC_TO_UI(*yy_cp)" ); - - if ( worry_about_NULs && nultrans ) - { - if ( ! fulltbl && ! fullspd ) - /* Compressed tables back up *before* they match. */ - gen_backing_up(); - - indent_puts( "if ( *yy_cp )" ); - indent_up(); - indent_puts( "{" ); /* } for vi */ - } - - if ( fulltbl ) - indent_put2s( - "yy_current_state = yy_nxt[yy_current_state][%s];", - char_map ); - - else if ( fullspd ) - indent_put2s( - "yy_current_state += yy_current_state[%s].yy_nxt;", - char_map ); - - else - gen_next_compressed_state( char_map ); - - if ( worry_about_NULs && nultrans ) - { - /* { for vi */ - indent_puts( "}" ); - indent_down(); - indent_puts( "else" ); - indent_up(); - indent_puts( - "yy_current_state = yy_NUL_trans[yy_current_state];" ); - indent_down(); - } - - if ( fullspd || fulltbl ) - gen_backing_up(); - - if ( reject ) - indent_puts( "*yy_state_ptr++ = yy_current_state;" ); - } - - -/* Generate the code to make a NUL transition. */ - -void gen_NUL_trans() - { /* NOTE - changes in here should be reflected in gen_next_match() */ - /* Only generate a definition for "yy_cp" if we'll generate code - * that uses it. Otherwise lint and the like complain. - */ - int need_backing_up = (num_backing_up > 0 && ! reject); - - if ( need_backing_up && (! nultrans || fullspd || fulltbl) ) - /* We're going to need yy_cp lying around for the call - * below to gen_backing_up(). - */ - indent_puts( "register char *yy_cp = yy_c_buf_p;" ); - - outc( '\n' ); - - if ( nultrans ) - { - indent_puts( - "yy_current_state = yy_NUL_trans[yy_current_state];" ); - indent_puts( "yy_is_jam = (yy_current_state == 0);" ); - } - - else if ( fulltbl ) - { - do_indent(); - out_dec( "yy_current_state = yy_nxt[yy_current_state][%d];\n", - NUL_ec ); - indent_puts( "yy_is_jam = (yy_current_state <= 0);" ); - } - - else if ( fullspd ) - { - do_indent(); - out_dec( "register int yy_c = %d;\n", NUL_ec ); - - indent_puts( - "register yyconst struct yy_trans_info *yy_trans_info;\n" ); - indent_puts( - "yy_trans_info = &yy_current_state[(unsigned int) yy_c];" ); - indent_puts( "yy_current_state += yy_trans_info->yy_nxt;" ); - - indent_puts( - "yy_is_jam = (yy_trans_info->yy_verify != yy_c);" ); - } - - else - { - char NUL_ec_str[20]; - - (void) sprintf( NUL_ec_str, "%d", NUL_ec ); - gen_next_compressed_state( NUL_ec_str ); - - do_indent(); - out_dec( "yy_is_jam = (yy_current_state == %d);\n", jamstate ); - - if ( reject ) - { - /* Only stack this state if it's a transition we - * actually make. If we stack it on a jam, then - * the state stack and yy_c_buf_p get out of sync. - */ - indent_puts( "if ( ! yy_is_jam )" ); - indent_up(); - indent_puts( "*yy_state_ptr++ = yy_current_state;" ); - indent_down(); - } - } - - /* If we've entered an accepting state, back up; note that - * compressed tables have *already* done such backing up, so - * we needn't bother with it again. - */ - if ( need_backing_up && (fullspd || fulltbl) ) - { - outc( '\n' ); - indent_puts( "if ( ! yy_is_jam )" ); - indent_up(); - indent_puts( "{" ); - gen_backing_up(); - indent_puts( "}" ); - indent_down(); - } - } - - -/* Generate the code to find the start state. */ - -void gen_start_state() - { - if ( fullspd ) - { - if ( bol_needed ) - { - indent_puts( - "yy_current_state = yy_start_state_list[yy_start + YY_AT_BOL()];" ); - } - else - indent_puts( - "yy_current_state = yy_start_state_list[yy_start];" ); - } - - else - { - indent_puts( "yy_current_state = yy_start;" ); - - if ( bol_needed ) - indent_puts( "yy_current_state += YY_AT_BOL();" ); - - if ( reject ) - { - /* Set up for storing up states. */ - indent_puts( "yy_state_ptr = yy_state_buf;" ); - indent_puts( "*yy_state_ptr++ = yy_current_state;" ); - } - } - } - - -/* gentabs - generate data statements for the transition tables */ - -void gentabs() - { - int i, j, k, *accset, nacc, *acc_array, total_states; - int end_of_buffer_action = num_rules + 1; - - acc_array = allocate_integer_array( current_max_dfas ); - nummt = 0; - - /* The compressed table format jams by entering the "jam state", - * losing information about the previous state in the process. - * In order to recover the previous state, we effectively need - * to keep backing-up information. - */ - ++num_backing_up; - - if ( reject ) - { - /* Write out accepting list and pointer list. - * - * First we generate the "yy_acclist" array. In the process, - * we compute the indices that will go into the "yy_accept" - * array, and save the indices in the dfaacc array. - */ - int EOB_accepting_list[2]; - - /* Set up accepting structures for the End Of Buffer state. */ - EOB_accepting_list[0] = 0; - EOB_accepting_list[1] = end_of_buffer_action; - accsiz[end_of_buffer_state] = 1; - dfaacc[end_of_buffer_state].dfaacc_set = EOB_accepting_list; - - out_str_dec( long_align ? C_long_decl : C_short_decl, - "yy_acclist", MAX( numas, 1 ) + 1 ); - - j = 1; /* index into "yy_acclist" array */ - - for ( i = 1; i <= lastdfa; ++i ) - { - acc_array[i] = j; - - if ( accsiz[i] != 0 ) - { - accset = dfaacc[i].dfaacc_set; - nacc = accsiz[i]; - - if ( trace ) - fprintf( stderr, - _( "state # %d accepts: " ), - i ); - - for ( k = 1; k <= nacc; ++k ) - { - int accnum = accset[k]; - - ++j; - - if ( variable_trailing_context_rules && - ! (accnum & YY_TRAILING_HEAD_MASK) && - accnum > 0 && accnum <= num_rules && - rule_type[accnum] == RULE_VARIABLE ) - { - /* Special hack to flag - * accepting number as part - * of trailing context rule. - */ - accnum |= YY_TRAILING_MASK; - } - - mkdata( accnum ); - - if ( trace ) - { - fprintf( stderr, "[%d]", - accset[k] ); - - if ( k < nacc ) - fputs( ", ", stderr ); - else - putc( '\n', stderr ); - } - } - } - } - - /* add accepting number for the "jam" state */ - acc_array[i] = j; - - dataend(); - } - - else - { - dfaacc[end_of_buffer_state].dfaacc_state = end_of_buffer_action; - - for ( i = 1; i <= lastdfa; ++i ) - acc_array[i] = dfaacc[i].dfaacc_state; - - /* add accepting number for jam state */ - acc_array[i] = 0; - } - - /* Spit out "yy_accept" array. If we're doing "reject", it'll be - * pointers into the "yy_acclist" array. Otherwise it's actual - * accepting numbers. In either case, we just dump the numbers. - */ - - /* "lastdfa + 2" is the size of "yy_accept"; includes room for C arrays - * beginning at 0 and for "jam" state. - */ - k = lastdfa + 2; - - if ( reject ) - /* We put a "cap" on the table associating lists of accepting - * numbers with state numbers. This is needed because we tell - * where the end of an accepting list is by looking at where - * the list for the next state starts. - */ - ++k; - - out_str_dec( long_align ? C_long_decl : C_short_decl, "yy_accept", k ); - - for ( i = 1; i <= lastdfa; ++i ) - { - mkdata( acc_array[i] ); - - if ( ! reject && trace && acc_array[i] ) - fprintf( stderr, _( "state # %d accepts: [%d]\n" ), - i, acc_array[i] ); - } - - /* Add entry for "jam" state. */ - mkdata( acc_array[i] ); - - if ( reject ) - /* Add "cap" for the list. */ - mkdata( acc_array[i] ); - - dataend(); - - if ( useecs ) - genecs(); - - if ( usemecs ) - { - /* Write out meta-equivalence classes (used to index - * templates with). - */ - - if ( trace ) - fputs( _( "\n\nMeta-Equivalence Classes:\n" ), - stderr ); - - out_str_dec( C_int_decl, "yy_meta", numecs + 1 ); - - for ( i = 1; i <= numecs; ++i ) - { - if ( trace ) - fprintf( stderr, "%d = %d\n", - i, ABS( tecbck[i] ) ); - - mkdata( ABS( tecbck[i] ) ); - } - - dataend(); - } - - total_states = lastdfa + numtemps; - - out_str_dec( (tblend >= MAX_SHORT || long_align) ? - C_long_decl : C_short_decl, - "yy_base", total_states + 1 ); - - for ( i = 1; i <= lastdfa; ++i ) - { - register int d = def[i]; - - if ( base[i] == JAMSTATE ) - base[i] = jambase; - - if ( d == JAMSTATE ) - def[i] = jamstate; - - else if ( d < 0 ) - { - /* Template reference. */ - ++tmpuses; - def[i] = lastdfa - d + 1; - } - - mkdata( base[i] ); - } - - /* Generate jam state's base index. */ - mkdata( base[i] ); - - for ( ++i /* skip jam state */; i <= total_states; ++i ) - { - mkdata( base[i] ); - def[i] = jamstate; - } - - dataend(); - - out_str_dec( (total_states >= MAX_SHORT || long_align) ? - C_long_decl : C_short_decl, - "yy_def", total_states + 1 ); - - for ( i = 1; i <= total_states; ++i ) - mkdata( def[i] ); - - dataend(); - - out_str_dec( (total_states >= MAX_SHORT || long_align) ? - C_long_decl : C_short_decl, - "yy_nxt", tblend + 1 ); - - for ( i = 1; i <= tblend; ++i ) - { - /* Note, the order of the following test is important. - * If chk[i] is 0, then nxt[i] is undefined. - */ - if ( chk[i] == 0 || nxt[i] == 0 ) - nxt[i] = jamstate; /* new state is the JAM state */ - - mkdata( nxt[i] ); - } - - dataend(); - - out_str_dec( (total_states >= MAX_SHORT || long_align) ? - C_long_decl : C_short_decl, - "yy_chk", tblend + 1 ); - - for ( i = 1; i <= tblend; ++i ) - { - if ( chk[i] == 0 ) - ++nummt; - - mkdata( chk[i] ); - } - - dataend(); - } - - -/* Write out a formatted string (with a secondary string argument) at the - * current indentation level, adding a final newline. - */ - -void indent_put2s( fmt, arg ) -char fmt[], arg[]; - { - do_indent(); - out_str( fmt, arg ); - outn( "" ); - } - - -/* Write out a string at the current indentation level, adding a final - * newline. - */ - -void indent_puts( str ) -char str[]; - { - do_indent(); - outn( str ); - } - - -/* make_tables - generate transition tables and finishes generating output file - */ - -void make_tables() - { - register int i; - int did_eof_rule = false; - - skelout(); - - /* First, take care of YY_DO_BEFORE_ACTION depending on yymore - * being used. - */ - set_indent( 1 ); - - if ( yymore_used && ! yytext_is_array ) - { - indent_puts( "yytext_ptr -= yy_more_len; \\" ); - indent_puts( "yyleng = (int) (yy_cp - yytext_ptr); \\" ); - } - - else - indent_puts( "yyleng = (int) (yy_cp - yy_bp); \\" ); - - /* Now also deal with copying yytext_ptr to yytext if needed. */ - skelout(); - if ( yytext_is_array ) - { - if ( yymore_used ) - indent_puts( - "if ( yyleng + yy_more_offset >= YYLMAX ) \\" ); - else - indent_puts( "if ( yyleng >= YYLMAX ) \\" ); - - indent_up(); - indent_puts( - "YY_FATAL_ERROR( \"token too large, exceeds YYLMAX\" ); \\" ); - indent_down(); - - if ( yymore_used ) - { - indent_puts( -"yy_flex_strncpy( &yytext[yy_more_offset], yytext_ptr, yyleng + 1 ); \\" ); - indent_puts( "yyleng += yy_more_offset; \\" ); - indent_puts( - "yy_prev_more_offset = yy_more_offset; \\" ); - indent_puts( "yy_more_offset = 0; \\" ); - } - else - { - indent_puts( - "yy_flex_strncpy( yytext, yytext_ptr, yyleng + 1 ); \\" ); - } - } - - set_indent( 0 ); - - skelout(); - - - out_dec( "#define YY_NUM_RULES %d\n", num_rules ); - out_dec( "#define YY_END_OF_BUFFER %d\n", num_rules + 1 ); - - if ( fullspd ) - { - /* Need to define the transet type as a size large - * enough to hold the biggest offset. - */ - int total_table_size = tblend + numecs + 1; - char *trans_offset_type = - (total_table_size >= MAX_SHORT || long_align) ? - "long" : "short"; - - set_indent( 0 ); - indent_puts( "struct yy_trans_info" ); - indent_up(); - indent_puts( "{" ); /* } for vi */ - - if ( long_align ) - indent_puts( "long yy_verify;" ); - else - indent_puts( "short yy_verify;" ); - - /* In cases where its sister yy_verify *is* a "yes, there is - * a transition", yy_nxt is the offset (in records) to the - * next state. In most cases where there is no transition, - * the value of yy_nxt is irrelevant. If yy_nxt is the -1th - * record of a state, though, then yy_nxt is the action number - * for that state. - */ - - indent_put2s( "%s yy_nxt;", trans_offset_type ); - indent_puts( "};" ); - indent_down(); - } - - if ( fullspd ) - genctbl(); - else if ( fulltbl ) - genftbl(); - else - gentabs(); - - /* Definitions for backing up. We don't need them if REJECT - * is being used because then we use an alternative backin-up - * technique instead. - */ - if ( num_backing_up > 0 && ! reject ) - { - if ( ! C_plus_plus ) - { - indent_puts( - "static yy_state_type yy_last_accepting_state;" ); - indent_puts( - "static char *yy_last_accepting_cpos;\n" ); - } - } - - if ( nultrans ) - { - out_str_dec( C_state_decl, "yy_NUL_trans", lastdfa + 1 ); - - for ( i = 1; i <= lastdfa; ++i ) - { - if ( fullspd ) - out_dec( " &yy_transition[%d],\n", base[i] ); - else - mkdata( nultrans[i] ); - } - - dataend(); - } - - if ( ddebug ) - { /* Spit out table mapping rules to line numbers. */ - if ( ! C_plus_plus ) - { - indent_puts( "extern int yy_flex_debug;" ); - indent_puts( "int yy_flex_debug = 1;\n" ); - } - - out_str_dec( long_align ? C_long_decl : C_short_decl, - "yy_rule_linenum", num_rules ); - for ( i = 1; i < num_rules; ++i ) - mkdata( rule_linenum[i] ); - dataend(); - } - - if ( reject ) - { - /* Declare state buffer variables. */ - if ( ! C_plus_plus ) - { - outn( - "static yy_state_type yy_state_buf[YY_BUF_SIZE + 2], *yy_state_ptr;" ); - outn( "static char *yy_full_match;" ); - outn( "static int yy_lp;" ); - } - - if ( variable_trailing_context_rules ) - { - if ( ! C_plus_plus ) - { - outn( - "static int yy_looking_for_trail_begin = 0;" ); - outn( "static int yy_full_lp;" ); - outn( "static int *yy_full_state;" ); - } - - out_hex( "#define YY_TRAILING_MASK 0x%x\n", - (unsigned int) YY_TRAILING_MASK ); - out_hex( "#define YY_TRAILING_HEAD_MASK 0x%x\n", - (unsigned int) YY_TRAILING_HEAD_MASK ); - } - - outn( "#define REJECT \\" ); - outn( "{ \\" ); /* } for vi */ - outn( - "*yy_cp = yy_hold_char; /* undo effects of setting up yytext */ \\" ); - outn( - "yy_cp = yy_full_match; /* restore poss. backed-over text */ \\" ); - - if ( variable_trailing_context_rules ) - { - outn( - "yy_lp = yy_full_lp; /* restore orig. accepting pos. */ \\" ); - outn( - "yy_state_ptr = yy_full_state; /* restore orig. state */ \\" ); - outn( - "yy_current_state = *yy_state_ptr; /* restore curr. state */ \\" ); - } - - outn( "++yy_lp; \\" ); - outn( "goto find_rule; \\" ); - /* { for vi */ - outn( "}" ); - } - - else - { - outn( - "/* The intent behind this definition is that it'll catch" ); - outn( " * any uses of REJECT which flex missed." ); - outn( " */" ); - outn( "#define REJECT reject_used_but_not_detected" ); - } - - if ( yymore_used ) - { - if ( ! C_plus_plus ) - { - if ( yytext_is_array ) - { - indent_puts( "static int yy_more_offset = 0;" ); - indent_puts( - "static int yy_prev_more_offset = 0;" ); - } - else - { - indent_puts( "static int yy_more_flag = 0;" ); - indent_puts( "static int yy_more_len = 0;" ); - } - } - - if ( yytext_is_array ) - { - indent_puts( - "#define yymore() (yy_more_offset = yy_flex_strlen( yytext ))" ); - indent_puts( "#define YY_NEED_STRLEN" ); - indent_puts( "#define YY_MORE_ADJ 0" ); - indent_puts( "#define YY_RESTORE_YY_MORE_OFFSET \\" ); - indent_up(); - indent_puts( "{ \\" ); - indent_puts( "yy_more_offset = yy_prev_more_offset; \\" ); - indent_puts( "yyleng -= yy_more_offset; \\" ); - indent_puts( "}" ); - indent_down(); - } - else - { - indent_puts( "#define yymore() (yy_more_flag = 1)" ); - indent_puts( "#define YY_MORE_ADJ yy_more_len" ); - indent_puts( "#define YY_RESTORE_YY_MORE_OFFSET" ); - } - } - - else - { - indent_puts( "#define yymore() yymore_used_but_not_detected" ); - indent_puts( "#define YY_MORE_ADJ 0" ); - indent_puts( "#define YY_RESTORE_YY_MORE_OFFSET" ); - } - - if ( ! C_plus_plus ) - { - if ( yytext_is_array ) - { - outn( "#ifndef YYLMAX" ); - outn( "#define YYLMAX 8192" ); - outn( "#endif\n" ); - outn( "char yytext[YYLMAX];" ); - outn( "char *yytext_ptr;" ); - } - - else - outn( "char *yytext;" ); - } - - out( &action_array[defs1_offset] ); - - line_directive_out( stdout, 0 ); - - skelout(); - - if ( ! C_plus_plus ) - { - if ( use_read ) - { - outn( -"\tif ( (result = read( fileno(yyin), (char *) buf, max_size )) < 0 ) \\" ); - outn( - "\t\tYY_FATAL_ERROR( \"input in flex scanner failed\" );" ); - } - - else - { - outn( - "\tif ( yy_current_buffer->yy_is_interactive ) \\" ); - outn( "\t\t{ \\" ); - outn( "\t\tint c = '*', n; \\" ); - outn( "\t\tfor ( n = 0; n < max_size && \\" ); - outn( "\t\t\t (c = getc( yyin )) != EOF && c != '\\n'; ++n ) \\" ); - outn( "\t\t\tbuf[n] = (char) c; \\" ); - outn( "\t\tif ( c == '\\n' ) \\" ); - outn( "\t\t\tbuf[n++] = (char) c; \\" ); - outn( "\t\tif ( c == EOF && ferror( yyin ) ) \\" ); - outn( - "\t\t\tYY_FATAL_ERROR( \"input in flex scanner failed\" ); \\" ); - outn( "\t\tresult = n; \\" ); - outn( "\t\t} \\" ); - outn( - "\telse if ( ((result = fread( buf, 1, max_size, yyin )) == 0) \\" ); - outn( "\t\t && ferror( yyin ) ) \\" ); - outn( - "\t\tYY_FATAL_ERROR( \"input in flex scanner failed\" );" ); - } - } - - skelout(); - - indent_puts( "#define YY_RULE_SETUP \\" ); - indent_up(); - if ( bol_needed ) - { - indent_puts( "if ( yyleng > 0 ) \\" ); - indent_up(); - indent_puts( "yy_current_buffer->yy_at_bol = \\" ); - indent_puts( "\t\t(yytext[yyleng - 1] == '\\n'); \\" ); - indent_down(); - } - indent_puts( "YY_USER_ACTION" ); - indent_down(); - - skelout(); - - /* Copy prolog to output file. */ - out( &action_array[prolog_offset] ); - - line_directive_out( stdout, 0 ); - - skelout(); - - set_indent( 2 ); - - if ( yymore_used && ! yytext_is_array ) - { - indent_puts( "yy_more_len = 0;" ); - indent_puts( "if ( yy_more_flag )" ); - indent_up(); - indent_puts( "{" ); - indent_puts( "yy_more_len = yy_c_buf_p - yytext_ptr;" ); - indent_puts( "yy_more_flag = 0;" ); - indent_puts( "}" ); - indent_down(); - } - - skelout(); - - gen_start_state(); - - /* Note, don't use any indentation. */ - outn( "yy_match:" ); - gen_next_match(); - - skelout(); - set_indent( 2 ); - gen_find_action(); - - skelout(); - if ( do_yylineno ) - { - indent_puts( "if ( yy_act != YY_END_OF_BUFFER )" ); - indent_up(); - indent_puts( "{" ); - indent_puts( "int yyl;" ); - indent_puts( "for ( yyl = 0; yyl < yyleng; ++yyl )" ); - indent_up(); - indent_puts( "if ( yytext[yyl] == '\\n' )" ); - indent_up(); - indent_puts( "++yylineno;" ); - indent_down(); - indent_down(); - indent_puts( "}" ); - indent_down(); - } - - skelout(); - if ( ddebug ) - { - indent_puts( "if ( yy_flex_debug )" ); - indent_up(); - - indent_puts( "{" ); - indent_puts( "if ( yy_act == 0 )" ); - indent_up(); - indent_puts( C_plus_plus ? - "cerr << \"--scanner backing up\\n\";" : - "fprintf( stderr, \"--scanner backing up\\n\" );" ); - indent_down(); - - do_indent(); - out_dec( "else if ( yy_act < %d )\n", num_rules ); - indent_up(); - - if ( C_plus_plus ) - { - indent_puts( - "cerr << \"--accepting rule at line \" << yy_rule_linenum[yy_act] <<" ); - indent_puts( - " \"(\\\"\" << yytext << \"\\\")\\n\";" ); - } - else - { - indent_puts( - "fprintf( stderr, \"--accepting rule at line %d (\\\"%s\\\")\\n\"," ); - - indent_puts( - " yy_rule_linenum[yy_act], yytext );" ); - } - - indent_down(); - - do_indent(); - out_dec( "else if ( yy_act == %d )\n", num_rules ); - indent_up(); - - if ( C_plus_plus ) - { - indent_puts( -"cerr << \"--accepting default rule (\\\"\" << yytext << \"\\\")\\n\";" ); - } - else - { - indent_puts( - "fprintf( stderr, \"--accepting default rule (\\\"%s\\\")\\n\"," ); - indent_puts( " yytext );" ); - } - - indent_down(); - - do_indent(); - out_dec( "else if ( yy_act == %d )\n", num_rules + 1 ); - indent_up(); - - indent_puts( C_plus_plus ? - "cerr << \"--(end of buffer or a NUL)\\n\";" : - "fprintf( stderr, \"--(end of buffer or a NUL)\\n\" );" ); - - indent_down(); - - do_indent(); - outn( "else" ); - indent_up(); - - if ( C_plus_plus ) - { - indent_puts( - "cerr << \"--EOF (start condition \" << YY_START << \")\\n\";" ); - } - else - { - indent_puts( - "fprintf( stderr, \"--EOF (start condition %d)\\n\", YY_START );" ); - } - - indent_down(); - - indent_puts( "}" ); - indent_down(); - } - - /* Copy actions to output file. */ - skelout(); - indent_up(); - gen_bu_action(); - out( &action_array[action_offset] ); - - line_directive_out( stdout, 0 ); - - /* generate cases for any missing EOF rules */ - for ( i = 1; i <= lastsc; ++i ) - if ( ! sceof[i] ) - { - do_indent(); - out_str( "case YY_STATE_EOF(%s):\n", scname[i] ); - did_eof_rule = true; - } - - if ( did_eof_rule ) - { - indent_up(); - indent_puts( "yyterminate();" ); - indent_down(); - } - - - /* Generate code for handling NUL's, if needed. */ - - /* First, deal with backing up and setting up yy_cp if the scanner - * finds that it should JAM on the NUL. - */ - skelout(); - set_indent( 4 ); - - if ( fullspd || fulltbl ) - indent_puts( "yy_cp = yy_c_buf_p;" ); - - else - { /* compressed table */ - if ( ! reject && ! interactive ) - { - /* Do the guaranteed-needed backing up to figure - * out the match. - */ - indent_puts( "yy_cp = yy_last_accepting_cpos;" ); - indent_puts( - "yy_current_state = yy_last_accepting_state;" ); - } - - else - /* Still need to initialize yy_cp, though - * yy_current_state was set up by - * yy_get_previous_state(). - */ - indent_puts( "yy_cp = yy_c_buf_p;" ); - } - - - /* Generate code for yy_get_previous_state(). */ - set_indent( 1 ); - skelout(); - - gen_start_state(); - - set_indent( 2 ); - skelout(); - gen_next_state( true ); - - set_indent( 1 ); - skelout(); - gen_NUL_trans(); - - skelout(); - if ( do_yylineno ) - { /* update yylineno inside of unput() */ - indent_puts( "if ( c == '\\n' )" ); - indent_up(); - indent_puts( "--yylineno;" ); - indent_down(); - } - - skelout(); - /* Update BOL and yylineno inside of input(). */ - if ( bol_needed ) - { - indent_puts( "yy_current_buffer->yy_at_bol = (c == '\\n');" ); - if ( do_yylineno ) - { - indent_puts( "if ( yy_current_buffer->yy_at_bol )" ); - indent_up(); - indent_puts( "++yylineno;" ); - indent_down(); - } - } - - else if ( do_yylineno ) - { - indent_puts( "if ( c == '\\n' )" ); - indent_up(); - indent_puts( "++yylineno;" ); - indent_down(); - } - - skelout(); - - /* Copy remainder of input to output. */ - - line_directive_out( stdout, 1 ); - - if ( sectnum == 3 ) - (void) flexscan(); /* copy remainder of input to output */ - } diff --git a/commands/flex-2.5.4/initscan.c b/commands/flex-2.5.4/initscan.c deleted file mode 100644 index 381644dde..000000000 --- a/commands/flex-2.5.4/initscan.c +++ /dev/null @@ -1,3697 +0,0 @@ -#line 2 "scan.c" -/* A lexical scanner generated by flex */ - -/* Scanner skeleton version: - * $Header$ - */ - -#define FLEX_SCANNER -#define YY_FLEX_MAJOR_VERSION 2 -#define YY_FLEX_MINOR_VERSION 5 - -#include - - -/* cfront 1.2 defines "c_plusplus" instead of "__cplusplus" */ -#ifdef c_plusplus -#ifndef __cplusplus -#define __cplusplus -#endif -#endif - - -#ifdef __cplusplus - -#include -#include - -/* Use prototypes in function declarations. */ -#define YY_USE_PROTOS - -/* The "const" storage-class-modifier is valid. */ -#define YY_USE_CONST - -#else /* ! __cplusplus */ - -#if __STDC__ - -#define YY_USE_PROTOS -#define YY_USE_CONST - -#endif /* __STDC__ */ -#endif /* ! __cplusplus */ - -#ifdef __TURBOC__ - #pragma warn -rch - #pragma warn -use -#include -#include -#define YY_USE_CONST -#define YY_USE_PROTOS -#endif - -#ifdef YY_USE_CONST -#define yyconst const -#else -#define yyconst -#endif - - -#ifdef YY_USE_PROTOS -#define YY_PROTO(proto) proto -#else -#define YY_PROTO(proto) () -#endif - -/* Returned upon end-of-file. */ -#define YY_NULL 0 - -/* Promotes a possibly negative, possibly signed char to an unsigned - * integer for use as an array index. If the signed char is negative, - * we want to instead treat it as an 8-bit unsigned char, hence the - * double cast. - */ -#define YY_SC_TO_UI(c) ((unsigned int) (unsigned char) c) - -/* Enter a start condition. This macro really ought to take a parameter, - * but we do it the disgusting crufty way forced on us by the ()-less - * definition of BEGIN. - */ -#define BEGIN yy_start = 1 + 2 * - -/* Translate the current start state into a value that can be later handed - * to BEGIN to return to the state. The YYSTATE alias is for lex - * compatibility. - */ -#define YY_START ((yy_start - 1) / 2) -#define YYSTATE YY_START - -/* Action number for EOF rule of a given start state. */ -#define YY_STATE_EOF(state) (YY_END_OF_BUFFER + state + 1) - -/* Special action meaning "start processing a new file". */ -#define YY_NEW_FILE yyrestart( yyin ) - -#define YY_END_OF_BUFFER_CHAR 0 - -/* Size of default input buffer. */ -#define YY_BUF_SIZE 16384 - -typedef struct yy_buffer_state *YY_BUFFER_STATE; - -extern int yyleng; -extern FILE *yyin, *yyout; - -#define EOB_ACT_CONTINUE_SCAN 0 -#define EOB_ACT_END_OF_FILE 1 -#define EOB_ACT_LAST_MATCH 2 - -/* The funky do-while in the following #define is used to turn the definition - * int a single C statement (which needs a semi-colon terminator). This - * avoids problems with code like: - * - * if ( condition_holds ) - * yyless( 5 ); - * else - * do_something_else(); - * - * Prior to using the do-while the compiler would get upset at the - * "else" because it interpreted the "if" statement as being all - * done when it reached the ';' after the yyless() call. - */ - -/* Return all but the first 'n' matched characters back to the input stream. */ - -#define yyless(n) \ - do \ - { \ - /* Undo effects of setting up yytext. */ \ - *yy_cp = yy_hold_char; \ - YY_RESTORE_YY_MORE_OFFSET \ - yy_c_buf_p = yy_cp = yy_bp + n - YY_MORE_ADJ; \ - YY_DO_BEFORE_ACTION; /* set up yytext again */ \ - } \ - while ( 0 ) - -#define unput(c) yyunput( c, yytext_ptr ) - -/* The following is because we cannot portably get our hands on size_t - * (without autoconf's help, which isn't available because we want - * flex-generated scanners to compile on their own). - */ -typedef unsigned int yy_size_t; - - -struct yy_buffer_state - { - FILE *yy_input_file; - - char *yy_ch_buf; /* input buffer */ - char *yy_buf_pos; /* current position in input buffer */ - - /* Size of input buffer in bytes, not including room for EOB - * characters. - */ - yy_size_t yy_buf_size; - - /* Number of characters read into yy_ch_buf, not including EOB - * characters. - */ - int yy_n_chars; - - /* Whether we "own" the buffer - i.e., we know we created it, - * and can realloc() it to grow it, and should free() it to - * delete it. - */ - int yy_is_our_buffer; - - /* Whether this is an "interactive" input source; if so, and - * if we're using stdio for input, then we want to use getc() - * instead of fread(), to make sure we stop fetching input after - * each newline. - */ - int yy_is_interactive; - - /* Whether we're considered to be at the beginning of a line. - * If so, '^' rules will be active on the next match, otherwise - * not. - */ - int yy_at_bol; - - /* Whether to try to fill the input buffer when we reach the - * end of it. - */ - int yy_fill_buffer; - - int yy_buffer_status; -#define YY_BUFFER_NEW 0 -#define YY_BUFFER_NORMAL 1 - /* When an EOF's been seen but there's still some text to process - * then we mark the buffer as YY_EOF_PENDING, to indicate that we - * shouldn't try reading from the input source any more. We might - * still have a bunch of tokens to match, though, because of - * possible backing-up. - * - * When we actually see the EOF, we change the status to "new" - * (via yyrestart()), so that the user can continue scanning by - * just pointing yyin at a new input file. - */ -#define YY_BUFFER_EOF_PENDING 2 - }; - -static YY_BUFFER_STATE yy_current_buffer = 0; - -/* We provide macros for accessing buffer states in case in the - * future we want to put the buffer states in a more general - * "scanner state". - */ -#define YY_CURRENT_BUFFER yy_current_buffer - - -/* yy_hold_char holds the character lost when yytext is formed. */ -static char yy_hold_char; - -static int yy_n_chars; /* number of characters read into yy_ch_buf */ - - -int yyleng; - -/* Points to current character in buffer. */ -static char *yy_c_buf_p = (char *) 0; -static int yy_init = 1; /* whether we need to initialize */ -static int yy_start = 0; /* start state number */ - -/* Flag which is used to allow yywrap()'s to do buffer switches - * instead of setting up a fresh yyin. A bit of a hack ... - */ -static int yy_did_buffer_switch_on_eof; - -void yyrestart YY_PROTO(( FILE *input_file )); - -void yy_switch_to_buffer YY_PROTO(( YY_BUFFER_STATE new_buffer )); -void yy_load_buffer_state YY_PROTO(( void )); -YY_BUFFER_STATE yy_create_buffer YY_PROTO(( FILE *file, int size )); -void yy_delete_buffer YY_PROTO(( YY_BUFFER_STATE b )); -void yy_init_buffer YY_PROTO(( YY_BUFFER_STATE b, FILE *file )); -void yy_flush_buffer YY_PROTO(( YY_BUFFER_STATE b )); -#define YY_FLUSH_BUFFER yy_flush_buffer( yy_current_buffer ) - -YY_BUFFER_STATE yy_scan_buffer YY_PROTO(( char *base, yy_size_t size )); -YY_BUFFER_STATE yy_scan_string YY_PROTO(( yyconst char *yy_str )); -YY_BUFFER_STATE yy_scan_bytes YY_PROTO(( yyconst char *bytes, int len )); - -static void *yy_flex_alloc YY_PROTO(( yy_size_t )); -static void *yy_flex_realloc YY_PROTO(( void *, yy_size_t )); -static void yy_flex_free YY_PROTO(( void * )); - -#define yy_new_buffer yy_create_buffer - -#define yy_set_interactive(is_interactive) \ - { \ - if ( ! yy_current_buffer ) \ - yy_current_buffer = yy_create_buffer( yyin, YY_BUF_SIZE ); \ - yy_current_buffer->yy_is_interactive = is_interactive; \ - } - -#define yy_set_bol(at_bol) \ - { \ - if ( ! yy_current_buffer ) \ - yy_current_buffer = yy_create_buffer( yyin, YY_BUF_SIZE ); \ - yy_current_buffer->yy_at_bol = at_bol; \ - } - -#define YY_AT_BOL() (yy_current_buffer->yy_at_bol) - -typedef unsigned char YY_CHAR; -FILE *yyin = (FILE *) 0, *yyout = (FILE *) 0; -typedef int yy_state_type; -extern char *yytext; -#define yytext_ptr yytext - -static yy_state_type yy_get_previous_state YY_PROTO(( void )); -static yy_state_type yy_try_NUL_trans YY_PROTO(( yy_state_type current_state )); -static int yy_get_next_buffer YY_PROTO(( void )); -static void yy_fatal_error YY_PROTO(( yyconst char msg[] )); - -/* Done after the current pattern has been matched and before the - * corresponding action - sets up yytext. - */ -#define YY_DO_BEFORE_ACTION \ - yytext_ptr = yy_bp; \ - yyleng = (int) (yy_cp - yy_bp); \ - yy_hold_char = *yy_cp; \ - *yy_cp = '\0'; \ - yy_c_buf_p = yy_cp; - -#define YY_NUM_RULES 165 -#define YY_END_OF_BUFFER 166 -static yyconst short int yy_accept[769] = - { 0, - 0, 0, 0, 0, 87, 87, 163, 163, 0, 0, - 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 0, 0, 0, 0, 166, 164, - 7, 18, 164, 16, 1, 17, 164, 164, 164, 164, - 15, 108, 100, 101, 108, 93, 108, 107, 108, 108, - 108, 107, 99, 89, 108, 108, 91, 92, 87, 88, - 87, 86, 85, 86, 86, 163, 163, 28, 29, 28, - 28, 28, 28, 28, 28, 31, 30, 32, 31, 113, - 109, 110, 112, 114, 141, 142, 141, 139, 138, 140, - - 115, 117, 115, 116, 115, 120, 120, 120, 120, 122, - 124, 122, 122, 122, 122, 123, 151, 155, 151, 154, - 156, 156, 152, 152, 152, 149, 150, 164, 82, 164, - 21, 22, 21, 20, 157, 159, 157, 160, 161, 147, - 147, 148, 147, 147, 147, 147, 147, 147, 147, 81, - 34, 33, 81, 81, 81, 81, 35, 81, 81, 81, - 81, 81, 81, 81, 81, 81, 81, 81, 81, 81, - 81, 81, 81, 81, 81, 81, 26, 23, 26, 24, - 7, 18, 0, 16, 1, 17, 0, 0, 0, 14, - 8, 0, 0, 0, 0, 4, 5, 0, 2, 15, - - 100, 101, 0, 0, 0, 95, 0, 0, 105, 105, - 0, 162, 162, 162, 94, 0, 99, 89, 0, 0, - 0, 91, 92, 104, 90, 0, 87, 88, 86, 85, - 85, 83, 84, 163, 163, 28, 29, 28, 28, 28, - 28, 31, 30, 32, 111, 112, 142, 138, 117, 0, - 118, 119, 124, 121, 151, 155, 0, 153, 0, 144, - 152, 152, 152, 0, 82, 0, 21, 22, 21, 19, - 157, 159, 158, 147, 147, 147, 148, 143, 147, 147, - 147, 34, 33, 0, 80, 0, 0, 81, 81, 81, - 81, 81, 81, 81, 81, 81, 81, 81, 81, 81, - - 81, 81, 81, 36, 81, 81, 81, 81, 81, 81, - 81, 81, 81, 81, 0, 25, 24, 0, 14, 8, - 0, 12, 0, 0, 0, 0, 0, 4, 5, 0, - 6, 0, 96, 0, 97, 0, 0, 105, 105, 0, - 105, 105, 105, 162, 162, 0, 106, 90, 98, 0, - 104, 0, 83, 84, 28, 28, 28, 27, 28, 0, - 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, - 0, 152, 152, 143, 143, 147, 147, 0, 0, 81, - 81, 81, 81, 81, 44, 81, 81, 81, 49, 81, - 81, 81, 81, 81, 81, 81, 81, 81, 81, 81, - - 81, 81, 81, 81, 81, 81, 81, 81, 0, 81, - 81, 81, 81, 0, 0, 0, 12, 0, 0, 0, - 0, 0, 0, 4, 5, 0, 105, 105, 105, 105, - 105, 105, 162, 0, 0, 28, 28, 0, 0, 0, - 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, - 152, 152, 147, 147, 37, 38, 81, 81, 81, 81, - 81, 81, 81, 81, 50, 51, 81, 81, 81, 55, - 81, 81, 81, 81, 81, 81, 60, 81, 81, 81, - 81, 81, 81, 67, 0, 0, 0, 81, 81, 81, - 81, 0, 13, 0, 0, 0, 0, 0, 0, 105, - - 105, 105, 105, 105, 105, 0, 0, 28, 28, 137, - 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, - 0, 0, 152, 152, 147, 147, 39, 81, 41, 81, - 43, 81, 81, 81, 47, 81, 52, 81, 81, 81, - 81, 81, 81, 81, 81, 81, 62, 81, 81, 65, - 81, 0, 0, 0, 0, 81, 81, 81, 81, 3, - 0, 0, 0, 0, 105, 105, 105, 0, 0, 28, - 28, 0, 0, 0, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 145, 146, 145, 146, 81, 42, 81, - 81, 81, 81, 81, 81, 81, 81, 81, 81, 81, - - 81, 78, 61, 81, 64, 81, 0, 0, 0, 0, - 81, 81, 69, 70, 0, 10, 0, 11, 0, 103, - 0, 102, 0, 0, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 81, 81, 81, 45, 81, 48, - 81, 81, 81, 81, 77, 81, 59, 63, 66, 0, - 0, 0, 0, 79, 81, 0, 102, 0, 0, 0, - 0, 0, 0, 0, 0, 0, 0, 0, 0, 81, - 81, 81, 46, 81, 81, 56, 81, 81, 0, 0, - 0, 0, 68, 0, 9, 0, 125, 126, 127, 128, - 129, 130, 131, 132, 133, 134, 135, 0, 81, 81, - - 81, 81, 81, 81, 81, 0, 0, 0, 0, 0, - 136, 81, 81, 81, 81, 54, 81, 81, 0, 0, - 0, 0, 0, 0, 81, 81, 81, 53, 81, 58, - 0, 0, 0, 0, 0, 0, 81, 81, 81, 81, - 72, 0, 0, 0, 0, 73, 81, 81, 81, 81, - 71, 0, 75, 0, 81, 81, 81, 74, 76, 81, - 81, 81, 81, 81, 81, 57, 40, 0 - } ; - -static yyconst int yy_ec[256] = - { 0, - 1, 1, 1, 1, 1, 1, 1, 1, 2, 3, - 1, 1, 4, 1, 1, 1, 1, 1, 1, 1, - 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, - 1, 2, 1, 5, 6, 7, 8, 1, 9, 10, - 10, 11, 12, 13, 14, 10, 15, 16, 16, 16, - 16, 16, 16, 16, 17, 18, 19, 20, 1, 21, - 22, 23, 10, 1, 31, 32, 33, 34, 35, 36, - 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, - 47, 48, 49, 50, 51, 52, 53, 54, 55, 47, - 26, 27, 28, 29, 30, 1, 31, 32, 33, 34, - - 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, - 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, - 55, 47, 56, 57, 58, 1, 1, 1, 1, 1, - 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, - 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, - 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, - 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, - 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, - 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, - 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, - - 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, - 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, - 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, - 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, - 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, - 1, 1, 1, 1, 1 - } ; - -static yyconst int yy_meta[59] = - { 0, - 1, 1, 2, 1, 3, 1, 1, 1, 4, 1, - 5, 6, 1, 7, 4, 8, 8, 8, 8, 1, - 1, 1, 1, 9, 10, 1, 11, 12, 1, 13, - 14, 14, 14, 14, 14, 14, 15, 15, 15, 15, - 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, - 15, 15, 15, 15, 15, 4, 1, 16 - } ; - -static yyconst short int yy_base[858] = - { 0, - 0, 58, 115, 172, 120, 129, 2712, 2711, 230, 2705, - 136, 141, 288, 0, 2683, 2682, 144, 151, 185, 191, - 178, 188, 344, 347, 375, 0, 125, 131, 147, 216, - 431, 434, 461, 0, 519, 0, 205, 349, 2710, 2716, - 353, 2716, 2706, 0, 360, 2716, 2705, 144, 570, 2696, - 0, 2716, 577, 2716, 2703, 2716, 438, 2716, 2684, 126, - 149, 427, 591, 2716, 2701, 141, 2682, 2716, 0, 2716, - 2699, 0, 2699, 2697, 155, 2696, 2716, 0, 2716, 2695, - 2716, 0, 2662, 2641, 2637, 0, 2692, 2716, 2690, 2716, - 2716, 2663, 0, 2716, 2716, 2716, 2688, 2716, 431, 2716, - - 2716, 2716, 2687, 2716, 567, 2716, 2669, 571, 164, 2716, - 2716, 2685, 0, 2667, 573, 2716, 0, 2716, 2683, 2716, - 573, 2674, 0, 2649, 2628, 2716, 2716, 222, 2716, 356, - 448, 2716, 450, 2667, 0, 2716, 2678, 2716, 0, 0, - 198, 2716, 2677, 2621, 2716, 2667, 0, 2642, 2621, 2716, - 2673, 2716, 2671, 2668, 2640, 2639, 2716, 544, 2639, 579, - 2634, 2635, 318, 0, 2623, 2631, 424, 562, 2614, 587, - 2629, 2613, 2618, 2626, 2629, 2604, 2716, 2716, 2653, 612, - 634, 2716, 2654, 0, 637, 2716, 2653, 600, 2616, 0, - 0, 641, 647, 651, 669, 0, 0, 453, 2716, 0, - - 672, 2716, 2651, 2597, 605, 2716, 2649, 2616, 620, 657, - 645, 2716, 662, 0, 2716, 2592, 688, 2716, 2646, 2592, - 2636, 2625, 2716, 0, 2716, 2610, 0, 2716, 0, 0, - 2642, 0, 0, 2640, 2716, 0, 2716, 0, 2602, 2598, - 745, 0, 2638, 2716, 2716, 0, 2716, 688, 2716, 773, - 2716, 2716, 2716, 2716, 0, 2716, 673, 2716, 0, 2716, - 0, 2599, 2595, 690, 2716, 698, 707, 2716, 709, 2716, - 0, 2716, 2716, 0, 596, 2579, 2716, 827, 0, 2596, - 2592, 2632, 2716, 2628, 2716, 2593, 2592, 0, 642, 2582, - 563, 2617, 2579, 620, 2578, 2577, 2583, 669, 2570, 2584, - - 2572, 0, 2569, 2716, 2570, 2571, 2579, 2582, 685, 125, - 2570, 2567, 2566, 688, 2608, 2716, 716, 2568, 0, 0, - 720, 2716, 2608, 884, 2562, 2559, 2569, 0, 0, 723, - 2716, 739, 2716, 805, 2716, 808, 2562, 787, 869, 876, - 930, 881, 973, 800, 0, 2548, 2716, 2716, 2716, 2570, - 0, 2559, 0, 0, 2568, 2557, 0, 2716, 0, 1009, - 2581, 678, 870, 871, 874, 879, 913, 992, 974, 1013, - 885, 2565, 2554, 0, 1067, 2563, 2552, 2546, 2545, 2557, - 2562, 2561, 2550, 2557, 0, 2554, 2537, 2556, 0, 2536, - 2543, 2533, 2548, 2568, 2537, 2549, 2544, 2542, 2541, 2532, - - 2539, 2540, 2538, 2539, 578, 2520, 2538, 2525, 860, 2526, - 2528, 2521, 2517, 2529, 817, 1044, 2716, 822, 1095, 914, - 2532, 2523, 2517, 0, 0, 2524, 1102, 1025, 1142, 2539, - 1028, 1163, 2716, 2513, 2521, 2523, 2507, 0, 2526, 1058, - 891, 1014, 1019, 894, 1038, 1080, 1072, 1086, 1083, 1081, - 2520, 2504, 2518, 2502, 2716, 2716, 2505, 2493, 2492, 2495, - 2507, 1148, 2507, 2492, 0, 0, 2492, 2493, 2507, 0, - 2525, 2490, 2498, 2522, 2485, 2495, 0, 2500, 2491, 2487, - 2479, 2479, 2483, 0, 875, 2494, 2481, 2494, 2480, 2475, - 2491, 2519, 2716, 920, 999, 2465, 2474, 2468, 2494, 2496, - - 1105, 1184, 1081, 902, 969, 2479, 2491, 2463, 2477, 2716, - 165, 1090, 1144, 1143, 1147, 1163, 1095, 1145, 1037, 1085, - 1150, 1173, 2461, 2475, 2459, 2473, 0, 2458, 0, 2460, - 0, 1165, 2454, 2469, 0, 2461, 0, 2471, 2410, 2414, - 2434, 2400, 2393, 2405, 2385, 2382, 0, 2383, 2335, 0, - 2335, 2330, 2326, 2309, 2278, 2259, 2269, 2268, 2256, 2297, - 1046, 2238, 2242, 2253, 1179, 1142, 1145, 2247, 2246, 0, - 0, 1191, 1192, 1172, 1201, 1202, 1204, 1205, 1206, 1207, - 1209, 1210, 1208, 0, 0, 0, 0, 2254, 0, 2221, - 2229, 2218, 2208, 2200, 2209, 2198, 2195, 2165, 2168, 2149, - - 2132, 0, 0, 2129, 0, 2139, 2143, 2134, 2124, 2137, - 2117, 2116, 0, 0, 1228, 2716, 1232, 2716, 2111, 2716, - 2117, 2716, 2115, 2114, 2108, 2107, 2106, 2103, 2102, 2098, - 2095, 2063, 2047, 1213, 2012, 1986, 1975, 0, 1954, 0, - 1947, 1950, 1941, 1945, 0, 1942, 0, 0, 0, 1938, - 1940, 1934, 1905, 0, 1872, 1234, 2716, 1888, 1882, 1881, - 1864, 1848, 1832, 1828, 1827, 1826, 1823, 1806, 1809, 1784, - 1787, 1772, 0, 1781, 1786, 0, 1766, 1767, 1759, 1744, - 1213, 1736, 0, 1236, 2716, 1245, 2716, 2716, 2716, 2716, - 2716, 2716, 2716, 2716, 2716, 2716, 2716, 1750, 1727, 1720, - - 1701, 1687, 1670, 1681, 1667, 1679, 1659, 689, 1658, 1671, - 2716, 1657, 1627, 1621, 1635, 0, 1603, 1596, 1595, 1608, - 1602, 1587, 1586, 1583, 1581, 1587, 1555, 0, 1547, 0, - 1527, 1507, 1520, 1503, 1483, 1482, 1485, 1443, 1440, 1228, - 2716, 1225, 1224, 1206, 1210, 2716, 1213, 1202, 1018, 948, - 2716, 945, 2716, 884, 780, 771, 779, 2716, 2716, 689, - 673, 581, 408, 318, 86, 0, 0, 2716, 1263, 1279, - 1295, 1311, 1327, 1343, 1359, 1375, 1391, 1407, 1423, 1439, - 1455, 1471, 1481, 1496, 1505, 1520, 1536, 1545, 1560, 1576, - 1592, 1608, 1624, 1634, 1649, 1659, 1674, 1690, 1706, 1718, - - 1728, 1743, 1759, 1775, 1791, 1807, 1817, 1832, 1843, 1236, - 1858, 1874, 1890, 1898, 1905, 1920, 1936, 1952, 1968, 1977, - 1985, 2001, 2017, 2033, 2049, 2065, 2081, 2097, 2113, 2123, - 2138, 2148, 2155, 2170, 2182, 2192, 2207, 2223, 2239, 2255, - 2265, 2280, 2291, 2306, 2322, 2338, 2354, 2364, 2373, 2388, - 2404, 2420, 2429, 2437, 2453, 2469, 2485 - } ; - -static yyconst short int yy_def[858] = - { 0, - 768, 768, 769, 769, 770, 771, 772, 772, 768, 9, - 773, 773, 768, 13, 774, 774, 775, 775, 776, 776, - 777, 777, 778, 778, 768, 25, 779, 779, 780, 780, - 781, 781, 768, 33, 768, 35, 782, 782, 768, 768, - 768, 768, 768, 783, 768, 768, 768, 768, 784, 768, - 785, 768, 768, 768, 768, 768, 768, 768, 768, 786, - 787, 788, 768, 768, 768, 768, 768, 768, 789, 768, - 789, 790, 791, 790, 790, 792, 768, 793, 768, 793, - 768, 794, 794, 794, 793, 795, 768, 768, 795, 768, - 768, 768, 796, 768, 768, 768, 768, 768, 768, 768, - - 768, 768, 768, 768, 787, 768, 768, 787, 797, 768, - 768, 768, 798, 768, 787, 768, 799, 768, 799, 768, - 800, 768, 801, 801, 801, 768, 768, 802, 768, 802, - 803, 768, 803, 768, 804, 768, 804, 768, 805, 806, - 806, 768, 806, 806, 768, 806, 807, 807, 807, 768, - 768, 768, 768, 808, 768, 768, 768, 809, 809, 809, - 809, 809, 809, 809, 809, 809, 809, 810, 809, 809, - 809, 809, 809, 809, 809, 809, 768, 768, 811, 768, - 768, 768, 768, 783, 768, 768, 768, 768, 768, 812, - 813, 768, 768, 768, 768, 814, 815, 816, 768, 785, - - 768, 768, 768, 768, 817, 768, 768, 768, 818, 818, - 819, 768, 768, 820, 768, 821, 768, 768, 768, 768, - 768, 768, 768, 822, 768, 768, 823, 768, 824, 825, - 825, 826, 827, 828, 768, 829, 768, 830, 830, 830, - 768, 831, 768, 768, 768, 832, 768, 768, 768, 833, - 768, 768, 768, 768, 834, 768, 835, 768, 835, 768, - 836, 836, 836, 837, 768, 837, 838, 768, 838, 768, - 839, 768, 768, 840, 840, 840, 768, 768, 841, 841, - 841, 768, 768, 842, 768, 768, 768, 843, 843, 843, - 843, 843, 843, 843, 843, 843, 843, 843, 843, 843, - - 843, 843, 843, 768, 843, 843, 843, 843, 843, 843, - 843, 843, 843, 843, 844, 768, 768, 768, 845, 846, - 847, 768, 768, 768, 768, 768, 768, 848, 849, 850, - 768, 850, 768, 851, 768, 851, 768, 852, 852, 852, - 768, 852, 852, 768, 853, 854, 768, 768, 768, 768, - 855, 768, 826, 827, 830, 830, 241, 768, 241, 241, - 833, 833, 833, 833, 833, 833, 833, 833, 833, 833, - 833, 836, 836, 278, 278, 841, 841, 768, 768, 843, - 843, 843, 843, 843, 843, 843, 843, 843, 843, 843, - 843, 843, 843, 843, 843, 843, 843, 843, 843, 843, - - 843, 843, 843, 843, 843, 843, 843, 843, 768, 843, - 843, 843, 843, 768, 847, 847, 768, 847, 847, 768, - 768, 768, 768, 848, 849, 768, 341, 852, 343, 341, - 852, 343, 768, 768, 768, 830, 830, 360, 768, 833, - 833, 833, 833, 833, 833, 833, 833, 833, 833, 833, - 836, 836, 841, 841, 768, 768, 843, 843, 843, 843, - 843, 843, 843, 843, 843, 843, 843, 843, 843, 843, - 843, 843, 843, 843, 843, 843, 843, 843, 843, 843, - 843, 843, 843, 843, 768, 768, 768, 843, 843, 843, - 843, 768, 768, 847, 847, 768, 768, 768, 768, 427, - - 852, 343, 852, 852, 852, 768, 768, 830, 830, 768, - 833, 833, 833, 833, 833, 833, 833, 833, 833, 833, - 833, 833, 836, 836, 841, 841, 843, 843, 843, 843, - 843, 843, 843, 843, 843, 843, 843, 843, 843, 843, - 843, 843, 843, 843, 843, 843, 843, 843, 843, 843, - 843, 768, 768, 768, 768, 843, 843, 843, 843, 768, - 856, 768, 768, 768, 852, 852, 852, 768, 768, 830, - 830, 833, 833, 833, 833, 833, 833, 833, 833, 833, - 833, 833, 833, 836, 836, 841, 841, 843, 843, 843, - 843, 843, 843, 843, 843, 843, 843, 843, 843, 843, - - 843, 843, 843, 843, 843, 843, 768, 768, 768, 768, - 843, 843, 843, 843, 856, 768, 856, 768, 768, 768, - 768, 768, 833, 833, 833, 833, 833, 833, 833, 833, - 833, 833, 833, 833, 843, 843, 843, 843, 843, 843, - 843, 843, 843, 843, 843, 843, 843, 843, 843, 768, - 768, 768, 768, 843, 843, 857, 768, 768, 768, 768, - 768, 768, 768, 768, 768, 768, 768, 768, 833, 843, - 843, 843, 843, 843, 843, 843, 843, 843, 768, 768, - 768, 768, 843, 857, 768, 857, 768, 768, 768, 768, - 768, 768, 768, 768, 768, 768, 768, 768, 843, 843, - - 843, 843, 843, 843, 843, 768, 768, 768, 768, 768, - 768, 843, 843, 843, 843, 843, 843, 843, 768, 768, - 768, 768, 768, 768, 843, 843, 843, 843, 843, 843, - 768, 768, 768, 768, 768, 768, 843, 843, 843, 843, - 768, 768, 768, 768, 768, 768, 843, 843, 843, 843, - 768, 768, 768, 768, 843, 843, 843, 768, 768, 843, - 843, 843, 843, 843, 843, 843, 843, 0, 768, 768, - 768, 768, 768, 768, 768, 768, 768, 768, 768, 768, - 768, 768, 768, 768, 768, 768, 768, 768, 768, 768, - 768, 768, 768, 768, 768, 768, 768, 768, 768, 768, - - 768, 768, 768, 768, 768, 768, 768, 768, 768, 768, - 768, 768, 768, 768, 768, 768, 768, 768, 768, 768, - 768, 768, 768, 768, 768, 768, 768, 768, 768, 768, - 768, 768, 768, 768, 768, 768, 768, 768, 768, 768, - 768, 768, 768, 768, 768, 768, 768, 768, 768, 768, - 768, 768, 768, 768, 768, 768, 768 - } ; - -static yyconst short int yy_nxt[2775] = - { 0, - 40, 41, 42, 43, 40, 40, 40, 40, 40, 40, - 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, - 40, 40, 40, 44, 44, 40, 40, 40, 40, 44, - 44, 44, 44, 44, 44, 44, 44, 44, 44, 44, - 44, 44, 44, 44, 44, 44, 44, 44, 44, 44, - 44, 44, 44, 44, 44, 40, 40, 40, 40, 45, - 46, 47, 40, 48, 40, 49, 40, 40, 40, 40, - 40, 40, 50, 40, 40, 40, 40, 40, 40, 40, - 40, 51, 51, 40, 40, 40, 40, 51, 51, 51, - 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, - - 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, - 51, 51, 51, 40, 40, 40, 53, 54, 55, 56, - 767, 57, 70, 71, 58, 58, 58, 129, 130, 58, - 73, 70, 74, 129, 130, 59, 75, 87, 88, 89, - 60, 61, 87, 88, 89, 188, 96, 97, 224, 132, - 133, 210, 211, 96, 97, 404, 98, 134, 405, 99, - 99, 99, 99, 98, 213, 213, 99, 99, 99, 99, - 62, 58, 58, 63, 64, 65, 56, 252, 57, 66, - 40, 58, 58, 58, 439, 189, 58, 102, 103, 104, - 40, 252, 67, 102, 103, 104, 225, 60, 61, 275, - - 68, 100, 214, 107, 108, 276, 109, 178, 100, 179, - 232, 105, 233, 107, 108, 572, 109, 105, 132, 133, - 180, 180, 180, 180, 265, 266, 134, 62, 58, 58, - 78, 78, 79, 80, 78, 78, 78, 78, 78, 78, - 81, 78, 78, 78, 78, 78, 78, 78, 78, 78, - 78, 78, 78, 82, 82, 78, 78, 78, 78, 82, - 82, 82, 82, 82, 82, 82, 82, 82, 82, 82, - 82, 82, 82, 82, 82, 82, 82, 83, 82, 82, - 82, 82, 82, 82, 84, 78, 78, 78, 90, 90, - 40, 90, 90, 90, 90, 90, 90, 90, 91, 90, - - 91, 90, 90, 90, 90, 90, 90, 90, 90, 90, - 92, 93, 93, 90, 90, 90, 90, 93, 93, 93, - 93, 93, 93, 93, 93, 93, 93, 93, 93, 93, - 93, 93, 93, 93, 93, 93, 93, 93, 93, 93, - 93, 93, 93, 90, 90, 90, 111, 112, 296, 111, - 112, 178, 766, 179, 181, 182, 183, 113, 265, 266, - 113, 185, 186, 187, 180, 180, 180, 180, 297, 114, - 115, 116, 114, 115, 116, 117, 117, 118, 119, 120, - 117, 117, 117, 121, 117, 117, 117, 117, 117, 122, - 117, 117, 117, 117, 117, 117, 117, 117, 123, 123, - - 117, 117, 117, 117, 123, 123, 123, 123, 123, 123, - 123, 123, 123, 123, 123, 123, 123, 123, 123, 123, - 123, 123, 124, 123, 123, 123, 123, 123, 123, 125, - 126, 117, 127, 136, 137, 138, 136, 137, 138, 206, - 206, 207, 215, 215, 215, 215, 248, 248, 248, 248, - 268, 269, 268, 269, 300, 331, 332, 139, 301, 765, - 139, 140, 141, 142, 143, 140, 140, 140, 144, 140, - 140, 145, 140, 140, 140, 146, 140, 140, 140, 140, - 140, 140, 140, 140, 147, 147, 140, 140, 140, 140, - 147, 147, 147, 147, 147, 147, 147, 147, 147, 147, - - 147, 147, 147, 147, 147, 147, 147, 147, 148, 147, - 147, 147, 147, 147, 147, 149, 140, 140, 140, 150, - 151, 152, 153, 154, 150, 150, 150, 150, 150, 150, - 150, 150, 150, 150, 150, 155, 156, 150, 150, 150, - 157, 150, 150, 150, 150, 150, 150, 150, 150, 158, - 159, 160, 161, 162, 163, 164, 164, 165, 164, 164, - 166, 167, 168, 169, 170, 164, 171, 172, 164, 173, - 174, 175, 164, 176, 150, 150, 150, 191, 201, 202, - 203, 258, 213, 213, 204, 289, 213, 213, 213, 213, - 292, 290, 217, 218, 219, 383, 303, 275, 220, 259, - - 192, 188, 193, 276, 193, 221, 304, 335, 336, 293, - 193, 222, 384, 193, 194, 195, 480, 193, 196, 223, - 214, 306, 481, 197, 214, 198, 214, 317, 317, 317, - 317, 307, 764, 205, 308, 181, 182, 183, 185, 186, - 187, 189, 321, 322, 323, 339, 340, 205, 321, 322, - 323, 387, 321, 322, 323, 388, 324, 324, 324, 324, - 342, 342, 324, 324, 324, 324, 324, 324, 324, 324, - 321, 322, 323, 201, 202, 203, 341, 344, 344, 204, - 380, 258, 339, 340, 324, 324, 324, 324, 325, 217, - 218, 219, 265, 266, 381, 220, 326, 439, 343, 259, - - 265, 266, 221, 248, 248, 248, 248, 673, 222, 268, - 269, 268, 269, 327, 392, 402, 223, 409, 393, 440, - 410, 416, 417, 418, 403, 331, 332, 763, 205, 411, - 412, 317, 317, 317, 317, 419, 419, 419, 419, 721, - 413, 331, 332, 722, 205, 357, 357, 358, 359, 357, - 357, 357, 357, 357, 357, 360, 357, 357, 357, 357, - 357, 357, 357, 357, 357, 357, 357, 357, 360, 360, - 357, 357, 357, 357, 360, 360, 360, 360, 360, 360, - 360, 360, 360, 360, 360, 360, 360, 360, 360, 360, - 360, 360, 360, 360, 360, 360, 360, 360, 360, 360, - - 357, 357, 357, 362, 363, 364, 365, 335, 336, 366, - 335, 336, 339, 340, 367, 212, 212, 762, 368, 493, - 494, 369, 761, 370, 417, 494, 371, 374, 374, 760, - 374, 374, 374, 374, 374, 374, 374, 375, 374, 374, - 374, 374, 374, 374, 374, 374, 374, 374, 374, 374, - 375, 375, 374, 374, 374, 374, 375, 375, 375, 375, - 375, 375, 375, 375, 375, 375, 375, 375, 375, 375, - 375, 375, 375, 375, 375, 375, 375, 375, 375, 375, - 375, 375, 374, 374, 374, 420, 322, 323, 427, 439, - 439, 428, 428, 439, 339, 340, 431, 431, 439, 324, - - 324, 324, 324, 338, 439, 485, 339, 340, 486, 487, - 439, 441, 443, 439, 442, 420, 322, 323, 450, 552, - 759, 513, 493, 494, 516, 553, 444, 339, 340, 429, - 338, 338, 439, 338, 338, 338, 338, 338, 338, 338, - 338, 338, 338, 338, 338, 338, 338, 338, 338, 338, - 338, 338, 338, 430, 430, 339, 340, 445, 338, 338, - 430, 430, 430, 430, 430, 430, 430, 430, 430, 430, - 430, 430, 430, 430, 430, 430, 430, 430, 430, 430, - 430, 430, 430, 430, 430, 338, 338, 338, 432, 432, - 432, 432, 758, 439, 339, 340, 432, 757, 339, 340, - - 495, 417, 418, 432, 432, 432, 432, 432, 432, 360, - 360, 439, 438, 360, 360, 360, 360, 360, 360, 448, - 360, 360, 360, 360, 360, 360, 360, 360, 360, 360, - 360, 360, 439, 439, 360, 360, 360, 360, 439, 446, - 501, 501, 447, 504, 504, 416, 417, 418, 616, 617, - 339, 340, 638, 339, 340, 515, 439, 439, 449, 419, - 419, 419, 419, 514, 360, 360, 360, 375, 375, 580, - 375, 375, 375, 375, 375, 375, 375, 439, 375, 375, - 375, 375, 375, 375, 375, 375, 375, 375, 375, 375, - 517, 439, 375, 375, 375, 375, 495, 417, 418, 439, - - 439, 511, 439, 512, 439, 439, 339, 340, 209, 439, - 419, 419, 419, 419, 439, 519, 520, 581, 518, 522, - 566, 566, 375, 375, 375, 500, 500, 573, 521, 578, - 339, 340, 500, 500, 500, 500, 500, 500, 500, 500, - 500, 500, 500, 500, 500, 500, 500, 500, 500, 500, - 500, 500, 500, 500, 500, 500, 500, 502, 502, 502, - 502, 532, 439, 439, 439, 502, 439, 339, 340, 439, - 339, 340, 502, 502, 502, 502, 502, 502, 505, 505, - 505, 505, 439, 533, 582, 576, 505, 574, 579, 534, - 575, 439, 439, 505, 505, 505, 505, 505, 505, 567, - - 567, 567, 567, 590, 339, 340, 338, 567, 577, 583, - 439, 439, 625, 591, 567, 567, 567, 567, 567, 567, - 439, 439, 624, 439, 439, 439, 439, 439, 439, 439, - 616, 617, 439, 623, 616, 617, 685, 686, 685, 686, - 756, 628, 626, 632, 708, 755, 634, 685, 686, 302, - 302, 627, 629, 754, 753, 630, 631, 633, 752, 751, - 750, 709, 669, 52, 52, 52, 52, 52, 52, 52, - 52, 52, 52, 52, 52, 52, 52, 52, 52, 69, - 69, 69, 69, 69, 69, 69, 69, 69, 69, 69, - 69, 69, 69, 69, 69, 72, 72, 72, 72, 72, - - 72, 72, 72, 72, 72, 72, 72, 72, 72, 72, - 72, 76, 76, 76, 76, 76, 76, 76, 76, 76, - 76, 76, 76, 76, 76, 76, 76, 86, 86, 86, - 86, 86, 86, 86, 86, 86, 86, 86, 86, 86, - 86, 86, 86, 40, 40, 40, 40, 40, 40, 40, - 40, 40, 40, 40, 40, 40, 40, 40, 40, 95, - 95, 95, 95, 95, 95, 95, 95, 95, 95, 95, - 95, 95, 95, 95, 95, 101, 101, 101, 101, 101, - 101, 101, 101, 101, 101, 101, 101, 101, 101, 101, - 101, 106, 106, 106, 106, 106, 106, 106, 106, 106, - - 106, 106, 106, 106, 106, 106, 106, 110, 110, 110, - 110, 110, 110, 110, 110, 110, 110, 110, 110, 110, - 110, 110, 110, 128, 128, 128, 128, 128, 128, 128, - 128, 128, 128, 128, 128, 128, 128, 128, 128, 131, - 131, 131, 131, 131, 131, 131, 131, 131, 131, 131, - 131, 131, 131, 131, 131, 135, 135, 135, 135, 135, - 135, 135, 135, 135, 135, 135, 135, 135, 135, 135, - 135, 177, 177, 177, 177, 177, 177, 177, 177, 177, - 177, 177, 177, 177, 177, 177, 177, 184, 184, 184, - 184, 749, 748, 184, 184, 184, 190, 190, 190, 190, - - 190, 190, 190, 190, 190, 190, 190, 190, 190, 190, - 190, 200, 200, 200, 200, 747, 746, 200, 200, 200, - 209, 745, 209, 209, 209, 209, 209, 209, 209, 209, - 209, 209, 209, 209, 209, 209, 212, 744, 212, 212, - 212, 212, 212, 212, 212, 212, 212, 212, 212, 212, - 212, 212, 216, 216, 216, 743, 742, 216, 216, 216, - 227, 741, 227, 227, 227, 227, 227, 227, 227, 227, - 227, 227, 227, 227, 227, 227, 229, 740, 229, 229, - 229, 229, 229, 229, 229, 229, 229, 229, 229, 229, - 229, 229, 230, 739, 230, 230, 230, 230, 230, 230, - - 230, 230, 230, 230, 230, 230, 230, 230, 234, 234, - 234, 234, 234, 234, 234, 234, 234, 234, 234, 234, - 234, 234, 234, 234, 236, 738, 236, 236, 737, 236, - 236, 236, 736, 735, 236, 236, 734, 733, 732, 236, - 238, 238, 238, 238, 731, 730, 238, 238, 238, 242, - 729, 242, 242, 242, 242, 242, 242, 242, 242, 242, - 242, 242, 242, 242, 242, 246, 246, 246, 246, 728, - 727, 246, 246, 246, 251, 726, 251, 251, 251, 251, - 251, 251, 251, 251, 251, 251, 251, 251, 251, 251, - 254, 725, 254, 254, 254, 254, 254, 254, 254, 254, - - 254, 724, 254, 254, 254, 254, 255, 723, 720, 719, - 255, 255, 255, 255, 718, 717, 255, 255, 257, 716, - 257, 257, 257, 257, 257, 257, 257, 257, 257, 257, - 257, 257, 257, 257, 261, 261, 261, 261, 715, 714, - 261, 261, 261, 264, 264, 264, 264, 264, 264, 264, - 264, 264, 264, 264, 264, 264, 264, 264, 264, 267, - 267, 267, 267, 713, 267, 267, 267, 267, 267, 267, - 267, 267, 267, 267, 267, 271, 712, 711, 271, 271, - 271, 271, 271, 271, 271, 710, 271, 271, 271, 271, - 271, 273, 707, 273, 273, 273, 273, 273, 273, 273, - - 273, 273, 273, 273, 273, 273, 273, 274, 706, 274, - 274, 705, 274, 274, 274, 704, 703, 274, 274, 702, - 701, 700, 274, 279, 279, 279, 279, 699, 698, 279, - 279, 279, 284, 697, 284, 284, 284, 284, 284, 284, - 284, 284, 284, 284, 284, 284, 284, 284, 288, 288, - 696, 288, 288, 695, 694, 693, 288, 288, 315, 692, - 315, 315, 315, 315, 315, 315, 315, 315, 315, 315, - 315, 315, 315, 315, 319, 691, 319, 319, 319, 319, - 319, 319, 319, 319, 319, 319, 319, 319, 319, 319, - 320, 690, 320, 320, 320, 320, 320, 320, 320, 320, - - 320, 320, 320, 320, 320, 320, 328, 328, 689, 688, - 328, 328, 328, 329, 329, 687, 683, 329, 329, 329, - 330, 330, 330, 330, 330, 330, 330, 330, 330, 330, - 330, 330, 330, 330, 330, 330, 334, 334, 334, 334, - 334, 334, 334, 334, 334, 334, 334, 334, 334, 334, - 334, 334, 338, 682, 338, 338, 338, 338, 338, 338, - 338, 338, 338, 681, 338, 338, 338, 338, 209, 680, - 209, 209, 209, 209, 209, 209, 209, 209, 209, 209, - 209, 209, 209, 209, 345, 345, 679, 678, 677, 676, - 345, 346, 346, 346, 346, 675, 674, 346, 346, 346, - - 346, 351, 673, 351, 351, 351, 351, 351, 351, 351, - 351, 351, 351, 351, 351, 351, 351, 227, 672, 227, - 227, 227, 227, 227, 227, 227, 227, 227, 227, 227, - 227, 227, 227, 229, 671, 229, 229, 229, 229, 229, - 229, 229, 229, 229, 229, 229, 229, 229, 229, 230, - 670, 230, 230, 230, 230, 230, 230, 230, 230, 230, - 230, 230, 230, 230, 230, 353, 668, 353, 353, 353, - 353, 353, 353, 353, 353, 353, 353, 353, 353, 353, - 353, 354, 667, 354, 354, 354, 354, 354, 354, 354, - 354, 354, 354, 354, 354, 354, 354, 234, 234, 234, - - 234, 234, 234, 234, 234, 234, 234, 234, 234, 234, - 234, 234, 234, 236, 666, 236, 236, 665, 236, 236, - 236, 664, 663, 236, 236, 662, 661, 660, 236, 238, - 238, 238, 238, 659, 658, 238, 238, 238, 242, 657, - 242, 242, 242, 242, 242, 242, 242, 242, 242, 242, - 242, 242, 242, 242, 246, 246, 246, 246, 656, 655, - 246, 246, 246, 361, 361, 654, 653, 652, 361, 361, - 255, 651, 650, 649, 255, 255, 255, 255, 648, 647, - 255, 255, 257, 646, 257, 257, 257, 257, 257, 257, - 257, 257, 257, 257, 257, 257, 257, 257, 261, 261, - - 261, 261, 645, 644, 261, 261, 261, 264, 264, 264, - 264, 264, 264, 264, 264, 264, 264, 264, 264, 264, - 264, 264, 264, 267, 267, 267, 267, 643, 267, 267, - 267, 267, 267, 267, 267, 267, 267, 267, 267, 271, - 642, 641, 271, 271, 271, 271, 271, 271, 271, 640, - 271, 271, 271, 271, 271, 274, 639, 274, 274, 638, - 274, 274, 274, 637, 636, 274, 274, 635, 622, 621, - 274, 279, 279, 279, 279, 620, 619, 279, 279, 279, - 284, 618, 284, 284, 284, 284, 284, 284, 284, 284, - 284, 284, 284, 284, 284, 284, 288, 288, 560, 288, - - 288, 614, 613, 612, 288, 288, 315, 611, 315, 315, - 315, 315, 315, 315, 315, 315, 315, 315, 315, 315, - 315, 315, 319, 610, 319, 319, 319, 319, 319, 319, - 319, 319, 319, 319, 319, 319, 319, 319, 320, 609, - 320, 320, 320, 320, 320, 320, 320, 320, 320, 320, - 320, 320, 320, 320, 415, 415, 415, 415, 415, 415, - 415, 415, 415, 415, 415, 415, 415, 415, 415, 415, - 424, 424, 424, 424, 608, 607, 424, 424, 424, 425, - 425, 425, 425, 606, 605, 425, 425, 425, 330, 330, - 330, 330, 330, 330, 330, 330, 330, 330, 330, 330, - - 330, 330, 330, 330, 334, 334, 334, 334, 334, 334, - 334, 334, 334, 334, 334, 334, 334, 334, 334, 334, - 338, 604, 338, 338, 338, 338, 338, 338, 338, 338, - 338, 603, 338, 338, 338, 338, 433, 433, 602, 601, - 600, 599, 433, 346, 346, 346, 346, 598, 597, 346, - 346, 346, 346, 351, 596, 351, 351, 351, 351, 351, - 351, 351, 351, 351, 351, 351, 351, 351, 351, 615, - 615, 615, 615, 615, 615, 615, 615, 615, 615, 615, - 615, 615, 615, 615, 615, 684, 684, 684, 684, 684, - 684, 684, 684, 684, 684, 684, 684, 684, 684, 684, - - 684, 595, 594, 593, 592, 589, 588, 587, 586, 585, - 584, 571, 570, 569, 568, 565, 564, 563, 562, 561, - 560, 559, 558, 557, 556, 555, 554, 551, 550, 549, - 548, 547, 546, 545, 544, 543, 542, 541, 540, 539, - 538, 537, 536, 535, 531, 530, 529, 528, 527, 526, - 525, 524, 523, 510, 509, 508, 507, 506, 503, 499, - 498, 497, 496, 492, 491, 490, 489, 488, 484, 483, - 482, 479, 478, 477, 476, 475, 474, 473, 472, 471, - 470, 469, 468, 467, 466, 465, 464, 463, 462, 461, - 460, 459, 458, 457, 456, 455, 454, 453, 452, 451, - - 439, 437, 436, 435, 434, 347, 426, 423, 422, 421, - 322, 414, 316, 408, 407, 406, 401, 400, 399, 398, - 397, 396, 395, 394, 391, 390, 389, 386, 385, 382, - 379, 378, 285, 282, 377, 376, 278, 373, 372, 243, - 356, 355, 235, 231, 352, 350, 349, 348, 218, 347, - 337, 206, 333, 202, 318, 186, 182, 316, 314, 313, - 312, 311, 310, 309, 305, 299, 298, 295, 294, 291, - 287, 286, 285, 283, 282, 281, 280, 260, 278, 277, - 272, 270, 263, 262, 260, 256, 250, 253, 250, 249, - 247, 245, 244, 243, 241, 240, 239, 237, 235, 228, - - 231, 228, 226, 218, 208, 202, 199, 186, 182, 768, - 94, 94, 85, 77, 77, 39, 768, 768, 768, 768, - 768, 768, 768, 768, 768, 768, 768, 768, 768, 768, - 768, 768, 768, 768, 768, 768, 768, 768, 768, 768, - 768, 768, 768, 768, 768, 768, 768, 768, 768, 768, - 768, 768, 768, 768, 768, 768, 768, 768, 768, 768, - 768, 768, 768, 768, 768, 768, 768, 768, 768, 768, - 768, 768, 768, 768 - } ; - -static yyconst short int yy_chk[2775] = - { 0, - 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, - 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, - 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, - 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, - 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, - 1, 1, 1, 1, 1, 1, 1, 1, 2, 2, - 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, - 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, - 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, - 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, - - 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, - 2, 2, 2, 2, 2, 2, 3, 3, 3, 3, - 765, 3, 5, 5, 3, 3, 3, 27, 27, 3, - 6, 6, 6, 28, 28, 3, 6, 11, 11, 11, - 3, 3, 12, 12, 12, 48, 17, 17, 66, 29, - 29, 60, 60, 18, 18, 310, 17, 29, 310, 17, - 17, 17, 17, 18, 61, 61, 18, 18, 18, 18, - 3, 3, 3, 4, 4, 4, 4, 109, 4, 4, - 21, 4, 4, 4, 511, 48, 4, 19, 19, 19, - 22, 109, 4, 20, 20, 20, 66, 4, 4, 141, - - 4, 17, 61, 21, 21, 141, 21, 37, 18, 37, - 75, 19, 75, 22, 22, 511, 22, 20, 30, 30, - 37, 37, 37, 37, 128, 128, 30, 4, 4, 4, - 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, - 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, - 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, - 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, - 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, - 9, 9, 9, 9, 9, 9, 9, 9, 13, 13, - 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, - - 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, - 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, - 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, - 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, - 13, 13, 13, 13, 13, 13, 23, 23, 163, 24, - 24, 38, 764, 38, 41, 41, 41, 23, 130, 130, - 24, 45, 45, 45, 38, 38, 38, 38, 163, 23, - 23, 23, 24, 24, 24, 25, 25, 25, 25, 25, - 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, - 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, - - 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, - 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, - 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, - 25, 25, 25, 31, 31, 31, 32, 32, 32, 57, - 57, 57, 62, 62, 62, 62, 99, 99, 99, 99, - 131, 131, 133, 133, 167, 198, 198, 31, 167, 763, - 32, 33, 33, 33, 33, 33, 33, 33, 33, 33, - 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, - 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, - 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, - - 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, - 33, 33, 33, 33, 33, 33, 33, 33, 33, 35, - 35, 35, 35, 35, 35, 35, 35, 35, 35, 35, - 35, 35, 35, 35, 35, 35, 35, 35, 35, 35, - 35, 35, 35, 35, 35, 35, 35, 35, 35, 35, - 35, 35, 35, 35, 35, 35, 35, 35, 35, 35, - 35, 35, 35, 35, 35, 35, 35, 35, 35, 35, - 35, 35, 35, 35, 35, 35, 35, 49, 53, 53, - 53, 121, 105, 105, 53, 158, 108, 108, 115, 115, - 160, 158, 63, 63, 63, 291, 168, 275, 63, 121, - - 49, 188, 49, 275, 49, 63, 168, 205, 205, 160, - 49, 63, 291, 49, 49, 49, 405, 49, 49, 63, - 105, 170, 405, 49, 108, 49, 115, 180, 180, 180, - 180, 170, 762, 53, 170, 181, 181, 181, 185, 185, - 185, 188, 192, 192, 192, 209, 209, 63, 193, 193, - 193, 294, 194, 194, 194, 294, 192, 192, 192, 192, - 211, 211, 193, 193, 193, 193, 194, 194, 194, 194, - 195, 195, 195, 201, 201, 201, 210, 213, 213, 201, - 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137, 134, 125, 124, 122, 119, 114, 112, 107, 103, - 97, 92, 89, 87, 85, 84, 83, 80, 76, 74, - - 73, 71, 67, 65, 59, 55, 50, 47, 43, 39, - 16, 15, 10, 8, 7, 768, 768, 768, 768, 768, - 768, 768, 768, 768, 768, 768, 768, 768, 768, 768, - 768, 768, 768, 768, 768, 768, 768, 768, 768, 768, - 768, 768, 768, 768, 768, 768, 768, 768, 768, 768, - 768, 768, 768, 768, 768, 768, 768, 768, 768, 768, - 768, 768, 768, 768, 768, 768, 768, 768, 768, 768, - 768, 768, 768, 768 - } ; - -static yy_state_type yy_last_accepting_state; -static char *yy_last_accepting_cpos; - -/* The intent behind this definition is that it'll catch - * any uses of REJECT which flex missed. - */ -#define REJECT reject_used_but_not_detected -#define yymore() yymore_used_but_not_detected -#define YY_MORE_ADJ 0 -#define YY_RESTORE_YY_MORE_OFFSET -char *yytext; -#line 1 "scan.l" -#define INITIAL 0 -/* scan.l - scanner for flex input */ -#line 4 "scan.l" -/*- - * Copyright (c) 1990 The Regents of the University of California. - * All rights reserved. - * - * This code is derived from software contributed to Berkeley by - * Vern Paxson. - * - * The United States Government has rights in this work pursuant - * to contract no. DE-AC03-76SF00098 between the United States - * Department of Energy and the University of California. - * - * Redistribution and use in source and binary forms with or without - * modification are permitted provided that: (1) source distributions retain - * this entire copyright notice and comment, and (2) distributions including - * binaries display the following acknowledgement: ``This product includes - * software developed by the University of California, Berkeley and its - * contributors'' in the documentation or other materials provided with the - * distribution and in all advertising materials mentioning features or use - * of this software. Neither the name of the University nor the names of - * its contributors may be used to endorse or promote products derived from - * this software without specific prior written permission. - * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED - * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF - * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. - */ - -/* $Header$ */ - -#include "flexdef.h" -#include "parse.h" - -#define ACTION_ECHO add_action( yytext ) -#define ACTION_IFDEF(def, should_define) \ - { \ - if ( should_define ) \ - action_define( def, 1 ); \ - } - -#define MARK_END_OF_PROLOG mark_prolog(); - -#define YY_DECL \ - int flexscan() - -#define RETURNCHAR \ - yylval = (unsigned char) yytext[0]; \ - return CHAR; - -#define RETURNNAME \ - strcpy( nmstr, yytext ); \ - return NAME; - -#define PUT_BACK_STRING(str, start) \ - for ( i = strlen( str ) - 1; i >= start; --i ) \ - unput((str)[i]) - -#define CHECK_REJECT(str) \ - if ( all_upper( str ) ) \ - reject = true; - -#define CHECK_YYMORE(str) \ - if ( all_lower( str ) ) \ - yymore_used = true; -#define YY_STACK_USED 1 -#define YY_NO_TOP_STATE 1 -#define SECT2 1 -#define SECT2PROLOG 2 -#define SECT3 3 -#define CODEBLOCK 4 -#define PICKUPDEF 5 -#define SC 6 -#define CARETISBOL 7 -#define NUM 8 -#define QUOTE 9 - -#define FIRSTCCL 10 -#define CCL 11 -#define ACTION 12 -#define RECOVER 13 -#define COMMENT 14 -#define ACTION_STRING 15 -#define PERCENT_BRACE_ACTION 16 - -#define OPTION 17 -#define LINEDIR 18 - -#line 1333 "scan.c" - -/* Macros after this point can all be overridden by user definitions in - * section 1. - */ - -#ifndef YY_SKIP_YYWRAP -#ifdef __cplusplus -extern "C" int yywrap YY_PROTO(( void )); -#else -extern int yywrap YY_PROTO(( void )); -#endif -#endif - -#ifndef YY_NO_UNPUT -static void yyunput YY_PROTO(( int c, char *buf_ptr )); -#endif - -#ifndef yytext_ptr -static void yy_flex_strncpy YY_PROTO(( char *, yyconst char *, int )); -#endif - -#ifdef YY_NEED_STRLEN -static int yy_flex_strlen YY_PROTO(( yyconst char * )); -#endif - -#ifndef YY_NO_INPUT -#ifdef __cplusplus -static int yyinput YY_PROTO(( void )); -#else -static int input YY_PROTO(( void )); -#endif -#endif - -#if YY_STACK_USED -static int yy_start_stack_ptr = 0; -static int yy_start_stack_depth = 0; -static int *yy_start_stack = 0; -#ifndef YY_NO_PUSH_STATE -static void yy_push_state YY_PROTO(( int new_state )); -#endif -#ifndef YY_NO_POP_STATE -static void yy_pop_state YY_PROTO(( void )); -#endif -#ifndef YY_NO_TOP_STATE -static int yy_top_state YY_PROTO(( void )); -#endif - -#else -#define YY_NO_PUSH_STATE 1 -#define YY_NO_POP_STATE 1 -#define YY_NO_TOP_STATE 1 -#endif - -#ifdef YY_MALLOC_DECL -YY_MALLOC_DECL -#else -#if __STDC__ -#ifndef __cplusplus -#include -#endif -#else -/* Just try to get by without declaring the routines. This will fail - * miserably on non-ANSI systems for which sizeof(size_t) != sizeof(int) - * or sizeof(void*) != sizeof(int). - */ -#endif -#endif - -/* Amount of stuff to slurp up with each read. */ -#ifndef YY_READ_BUF_SIZE -#define YY_READ_BUF_SIZE 8192 -#endif - -/* Copy whatever the last rule matched to the standard output. */ - -#ifndef ECHO -/* This used to be an fputs(), but since the string might contain NUL's, - * we now use fwrite(). - */ -#define ECHO (void) fwrite( yytext, yyleng, 1, yyout ) -#endif - -/* Gets input and stuffs it into "buf". number of characters read, or YY_NULL, - * is returned in "result". - */ -#ifndef YY_INPUT -#define YY_INPUT(buf,result,max_size) \ - if ( yy_current_buffer->yy_is_interactive ) \ - { \ - int c = '*', n; \ - for ( n = 0; n < max_size && \ - (c = getc( yyin )) != EOF && c != '\n'; ++n ) \ - buf[n] = (char) c; \ - if ( c == '\n' ) \ - buf[n++] = (char) c; \ - if ( c == EOF && ferror( yyin ) ) \ - YY_FATAL_ERROR( "input in flex scanner failed" ); \ - result = n; \ - } \ - else if ( ((result = fread( buf, 1, max_size, yyin )) == 0) \ - && ferror( yyin ) ) \ - YY_FATAL_ERROR( "input in flex scanner failed" ); -#endif - -/* No semi-colon after return; correct usage is to write "yyterminate();" - - * we don't want an extra ';' after the "return" because that will cause - * some compilers to complain about unreachable statements. - */ -#ifndef yyterminate -#define yyterminate() return YY_NULL -#endif - -/* Number of entries by which start-condition stack grows. */ -#ifndef YY_START_STACK_INCR -#define YY_START_STACK_INCR 25 -#endif - -/* Report a fatal error. */ -#ifndef YY_FATAL_ERROR -#define YY_FATAL_ERROR(msg) yy_fatal_error( msg ) -#endif - -/* Default declaration of generated scanner - a define so the user can - * easily add parameters. - */ -#ifndef YY_DECL -#define YY_DECL int yylex YY_PROTO(( void )) -#endif - -/* Code executed at the beginning of each rule, after yytext and yyleng - * have been set up. - */ -#ifndef YY_USER_ACTION -#define YY_USER_ACTION -#endif - -/* Code executed at the end of each rule. */ -#ifndef YY_BREAK -#define YY_BREAK break; -#endif - -#define YY_RULE_SETUP \ - if ( yyleng > 0 ) \ - yy_current_buffer->yy_at_bol = \ - (yytext[yyleng - 1] == '\n'); \ - YY_USER_ACTION - -YY_DECL - { - register yy_state_type yy_current_state; - register char *yy_cp, *yy_bp; - register int yy_act; - -#line 94 "scan.l" - - static int bracelevel, didadef, indented_code; - static int doing_rule_action = false; - static int option_sense; - - int doing_codeblock = false; - int i; - Char nmdef[MAXLINE], myesc(); - - -#line 1498 "scan.c" - - if ( yy_init ) - { - yy_init = 0; - -#ifdef YY_USER_INIT - YY_USER_INIT; -#endif - - if ( ! yy_start ) - yy_start = 1; /* first start state */ - - if ( ! yyin ) - yyin = stdin; - - if ( ! yyout ) - yyout = stdout; - - if ( ! yy_current_buffer ) - yy_current_buffer = - yy_create_buffer( yyin, YY_BUF_SIZE ); - - yy_load_buffer_state(); - } - - while ( 1 ) /* loops until end-of-file is reached */ - { - yy_cp = yy_c_buf_p; - - /* Support of yytext. */ - *yy_cp = yy_hold_char; - - /* yy_bp points to the position in yy_ch_buf of the start of - * the current run. - */ - yy_bp = yy_cp; - - yy_current_state = yy_start; - yy_current_state += YY_AT_BOL(); -yy_match: - do - { - register YY_CHAR yy_c = yy_ec[YY_SC_TO_UI(*yy_cp)]; - if ( yy_accept[yy_current_state] ) - { - yy_last_accepting_state = yy_current_state; - yy_last_accepting_cpos = yy_cp; - } - while ( yy_chk[yy_base[yy_current_state] + yy_c] != yy_current_state ) - { - yy_current_state = (int) yy_def[yy_current_state]; - if ( yy_current_state >= 769 ) - yy_c = yy_meta[(unsigned int) yy_c]; - } - yy_current_state = yy_nxt[yy_base[yy_current_state] + (unsigned int) yy_c]; - ++yy_cp; - } - while ( yy_base[yy_current_state] != 2716 ); - -yy_find_action: - yy_act = yy_accept[yy_current_state]; - if ( yy_act == 0 ) - { /* have to back up */ - yy_cp = yy_last_accepting_cpos; - yy_current_state = yy_last_accepting_state; - yy_act = yy_accept[yy_current_state]; - } - - YY_DO_BEFORE_ACTION; - - -do_action: /* This label is used only to access EOF actions. */ - - - switch ( yy_act ) - { /* beginning of action switch */ - case 0: /* must back up */ - /* undo the effects of YY_DO_BEFORE_ACTION */ - *yy_cp = yy_hold_char; - yy_cp = yy_last_accepting_cpos; - yy_current_state = yy_last_accepting_state; - goto yy_find_action; - - -case 1: -YY_RULE_SETUP -#line 105 "scan.l" -indented_code = true; BEGIN(CODEBLOCK); - YY_BREAK -case 2: -YY_RULE_SETUP -#line 106 "scan.l" -ACTION_ECHO; yy_push_state( COMMENT ); - YY_BREAK -case 3: -YY_RULE_SETUP -#line 107 "scan.l" -yy_push_state( LINEDIR ); - YY_BREAK -case 4: -YY_RULE_SETUP -#line 108 "scan.l" -return SCDECL; - YY_BREAK -case 5: -YY_RULE_SETUP -#line 109 "scan.l" -return XSCDECL; - YY_BREAK -case 6: -YY_RULE_SETUP -#line 110 "scan.l" -{ - ++linenum; - line_directive_out( (FILE *) 0, 1 ); - indented_code = false; - BEGIN(CODEBLOCK); - } - YY_BREAK -case 7: -YY_RULE_SETUP -#line 117 "scan.l" -/* discard */ - YY_BREAK -case 8: -YY_RULE_SETUP -#line 119 "scan.l" -{ - sectnum = 2; - bracelevel = 0; - mark_defs1(); - line_directive_out( (FILE *) 0, 1 ); - BEGIN(SECT2PROLOG); - return SECTEND; - } - YY_BREAK -case 9: -YY_RULE_SETUP -#line 128 "scan.l" -yytext_is_array = false; ++linenum; - YY_BREAK -case 10: -YY_RULE_SETUP -#line 129 "scan.l" -yytext_is_array = true; ++linenum; - YY_BREAK -case 11: -YY_RULE_SETUP -#line 131 "scan.l" -BEGIN(OPTION); return OPTION_OP; - YY_BREAK -case 12: -YY_RULE_SETUP -#line 133 "scan.l" -++linenum; /* ignore */ - YY_BREAK -case 13: -YY_RULE_SETUP -#line 134 "scan.l" -++linenum; /* ignore */ - YY_BREAK -case 14: -YY_RULE_SETUP -#line 136 "scan.l" -synerr( _( "unrecognized '%' directive" ) ); - YY_BREAK -case 15: -YY_RULE_SETUP -#line 138 "scan.l" -{ - strcpy( nmstr, yytext ); - didadef = false; - BEGIN(PICKUPDEF); - } - YY_BREAK -case 16: -YY_RULE_SETUP -#line 144 "scan.l" -RETURNNAME; - YY_BREAK -case 17: -YY_RULE_SETUP -#line 145 "scan.l" -++linenum; /* allows blank lines in section 1 */ - YY_BREAK -case 18: -YY_RULE_SETUP -#line 146 "scan.l" -ACTION_ECHO; ++linenum; /* maybe end of comment line */ - YY_BREAK - - -case 19: -YY_RULE_SETUP -#line 151 "scan.l" -ACTION_ECHO; yy_pop_state(); - YY_BREAK -case 20: -YY_RULE_SETUP -#line 152 "scan.l" -ACTION_ECHO; - YY_BREAK -case 21: -YY_RULE_SETUP -#line 153 "scan.l" -ACTION_ECHO; - YY_BREAK -case 22: -YY_RULE_SETUP -#line 154 "scan.l" -++linenum; ACTION_ECHO; - YY_BREAK - - -case 23: -YY_RULE_SETUP -#line 158 "scan.l" -yy_pop_state(); - YY_BREAK -case 24: -YY_RULE_SETUP -#line 159 "scan.l" -linenum = myctoi( yytext ); - YY_BREAK -case 25: -YY_RULE_SETUP -#line 161 "scan.l" -{ - flex_free( (void *) infilename ); - infilename = copy_string( yytext + 1 ); - infilename[strlen( infilename ) - 1] = '\0'; - } - YY_BREAK -case 26: -YY_RULE_SETUP -#line 166 "scan.l" -/* ignore spurious characters */ - YY_BREAK - - -case 27: -YY_RULE_SETUP -#line 170 "scan.l" -++linenum; BEGIN(INITIAL); - YY_BREAK -case 28: -YY_RULE_SETUP -#line 172 "scan.l" -ACTION_ECHO; - YY_BREAK -case 29: -YY_RULE_SETUP -#line 174 "scan.l" -{ - ++linenum; - ACTION_ECHO; - if ( indented_code ) - BEGIN(INITIAL); - } - YY_BREAK - - -case 30: -YY_RULE_SETUP -#line 184 "scan.l" -/* separates name and definition */ - YY_BREAK -case 31: -YY_RULE_SETUP -#line 186 "scan.l" -{ - strcpy( (char *) nmdef, yytext ); - - /* Skip trailing whitespace. */ - for ( i = strlen( (char *) nmdef ) - 1; - i >= 0 && (nmdef[i] == ' ' || nmdef[i] == '\t'); - --i ) - ; - - nmdef[i + 1] = '\0'; - - ndinstal( nmstr, nmdef ); - didadef = true; - } - YY_BREAK -case 32: -YY_RULE_SETUP -#line 201 "scan.l" -{ - if ( ! didadef ) - synerr( _( "incomplete name definition" ) ); - BEGIN(INITIAL); - ++linenum; - } - YY_BREAK - - -case 33: -YY_RULE_SETUP -#line 211 "scan.l" -++linenum; BEGIN(INITIAL); - YY_BREAK -case 34: -YY_RULE_SETUP -#line 212 "scan.l" -option_sense = true; - YY_BREAK -case 35: -YY_RULE_SETUP -#line 214 "scan.l" -return '='; - YY_BREAK -case 36: -YY_RULE_SETUP -#line 216 "scan.l" -option_sense = ! option_sense; - YY_BREAK -case 37: -YY_RULE_SETUP -#line 218 "scan.l" -csize = option_sense ? 128 : 256; - YY_BREAK -case 38: -YY_RULE_SETUP -#line 219 "scan.l" -csize = option_sense ? 256 : 128; - YY_BREAK -case 39: -YY_RULE_SETUP -#line 221 "scan.l" -long_align = option_sense; - YY_BREAK -case 40: -YY_RULE_SETUP -#line 222 "scan.l" -{ - action_define( "YY_ALWAYS_INTERACTIVE", option_sense ); - } - YY_BREAK -case 41: -YY_RULE_SETUP -#line 225 "scan.l" -yytext_is_array = option_sense; - YY_BREAK -case 42: -YY_RULE_SETUP -#line 226 "scan.l" -backing_up_report = option_sense; - YY_BREAK -case 43: -YY_RULE_SETUP -#line 227 "scan.l" -interactive = ! option_sense; - YY_BREAK -case 44: -YY_RULE_SETUP -#line 228 "scan.l" -C_plus_plus = option_sense; - YY_BREAK -case 45: -YY_RULE_SETUP -#line 229 "scan.l" -caseins = ! option_sense; - YY_BREAK -case 46: -YY_RULE_SETUP -#line 230 "scan.l" -caseins = option_sense; - YY_BREAK -case 47: -YY_RULE_SETUP -#line 231 "scan.l" -ddebug = option_sense; - YY_BREAK -case 48: -YY_RULE_SETUP -#line 232 "scan.l" -spprdflt = ! option_sense; - YY_BREAK -case 49: -YY_RULE_SETUP -#line 233 "scan.l" -useecs = option_sense; - YY_BREAK -case 50: -YY_RULE_SETUP -#line 234 "scan.l" -{ - useecs = usemecs = false; - use_read = fullspd = true; - } - YY_BREAK -case 51: -YY_RULE_SETUP -#line 238 "scan.l" -{ - useecs = usemecs = false; - use_read = fulltbl = true; - } - YY_BREAK -case 52: -YY_RULE_SETUP -#line 242 "scan.l" -ACTION_IFDEF("YY_NO_INPUT", ! option_sense); - YY_BREAK -case 53: -YY_RULE_SETUP -#line 243 "scan.l" -interactive = option_sense; - YY_BREAK -case 54: -YY_RULE_SETUP -#line 244 "scan.l" -lex_compat = option_sense; - YY_BREAK -case 55: -YY_RULE_SETUP -#line 245 "scan.l" -{ - action_define( "YY_MAIN", option_sense ); - do_yywrap = ! option_sense; - } - YY_BREAK -case 56: -YY_RULE_SETUP -#line 249 "scan.l" -usemecs = option_sense; - YY_BREAK -case 57: -YY_RULE_SETUP -#line 250 "scan.l" -{ - action_define( "YY_NEVER_INTERACTIVE", option_sense ); - } - YY_BREAK -case 58: -YY_RULE_SETUP -#line 253 "scan.l" -performance_report += option_sense ? 1 : -1; - YY_BREAK -case 59: -YY_RULE_SETUP -#line 254 "scan.l" -yytext_is_array = ! option_sense; - YY_BREAK -case 60: -YY_RULE_SETUP -#line 255 "scan.l" -use_read = option_sense; - YY_BREAK -case 61: -YY_RULE_SETUP -#line 256 "scan.l" -reject_really_used = option_sense; - YY_BREAK -case 62: -YY_RULE_SETUP -#line 257 "scan.l" -action_define( "YY_STACK_USED", option_sense ); - YY_BREAK -case 63: -YY_RULE_SETUP -#line 258 "scan.l" -do_stdinit = option_sense; - YY_BREAK -case 64: -YY_RULE_SETUP -#line 259 "scan.l" -use_stdout = option_sense; - YY_BREAK -case 65: -YY_RULE_SETUP -#line 260 "scan.l" -ACTION_IFDEF("YY_NO_UNPUT", ! option_sense); - YY_BREAK -case 66: -YY_RULE_SETUP -#line 261 "scan.l" -printstats = option_sense; - YY_BREAK -case 67: -YY_RULE_SETUP -#line 262 "scan.l" -nowarn = ! option_sense; - YY_BREAK -case 68: -YY_RULE_SETUP -#line 263 "scan.l" -do_yylineno = option_sense; - YY_BREAK -case 69: -YY_RULE_SETUP -#line 264 "scan.l" -yymore_really_used = option_sense; - YY_BREAK -case 70: -YY_RULE_SETUP -#line 265 "scan.l" -do_yywrap = option_sense; - YY_BREAK -case 71: -YY_RULE_SETUP -#line 267 "scan.l" -ACTION_IFDEF("YY_NO_PUSH_STATE", ! option_sense); - YY_BREAK -case 72: -YY_RULE_SETUP -#line 268 "scan.l" -ACTION_IFDEF("YY_NO_POP_STATE", ! option_sense); - YY_BREAK -case 73: -YY_RULE_SETUP -#line 269 "scan.l" -ACTION_IFDEF("YY_NO_TOP_STATE", ! option_sense); - YY_BREAK -case 74: -YY_RULE_SETUP -#line 271 "scan.l" -ACTION_IFDEF("YY_NO_SCAN_BUFFER", ! option_sense); - YY_BREAK -case 75: -YY_RULE_SETUP -#line 272 "scan.l" -ACTION_IFDEF("YY_NO_SCAN_BYTES", ! option_sense); - YY_BREAK -case 76: -YY_RULE_SETUP -#line 273 "scan.l" -ACTION_IFDEF("YY_NO_SCAN_STRING", ! option_sense); - YY_BREAK -case 77: -YY_RULE_SETUP -#line 275 "scan.l" -return OPT_OUTFILE; - YY_BREAK -case 78: -YY_RULE_SETUP -#line 276 "scan.l" -return OPT_PREFIX; - YY_BREAK -case 79: -YY_RULE_SETUP -#line 277 "scan.l" -return OPT_YYCLASS; - YY_BREAK -case 80: -YY_RULE_SETUP -#line 279 "scan.l" -{ - strcpy( nmstr, yytext + 1 ); - nmstr[strlen( nmstr ) - 1] = '\0'; - return NAME; - } - YY_BREAK -case 81: -YY_RULE_SETUP -#line 285 "scan.l" -{ - format_synerr( _( "unrecognized %%option: %s" ), - yytext ); - BEGIN(RECOVER); - } - YY_BREAK - -case 82: -YY_RULE_SETUP -#line 292 "scan.l" -++linenum; BEGIN(INITIAL); - YY_BREAK - -case 83: -YY_RULE_SETUP -#line 296 "scan.l" -++bracelevel; yyless( 2 ); /* eat only %{ */ - YY_BREAK -case 84: -YY_RULE_SETUP -#line 297 "scan.l" ---bracelevel; yyless( 2 ); /* eat only %} */ - YY_BREAK -case 85: -YY_RULE_SETUP -#line 299 "scan.l" -ACTION_ECHO; /* indented code in prolog */ - YY_BREAK -case 86: -YY_RULE_SETUP -#line 301 "scan.l" -{ /* non-indented code */ - if ( bracelevel <= 0 ) - { /* not in %{ ... %} */ - yyless( 0 ); /* put it all back */ - yy_set_bol( 1 ); - mark_prolog(); - BEGIN(SECT2); - } - else - ACTION_ECHO; - } - YY_BREAK -case 87: -YY_RULE_SETUP -#line 313 "scan.l" -ACTION_ECHO; - YY_BREAK -case 88: -YY_RULE_SETUP -#line 314 "scan.l" -++linenum; ACTION_ECHO; - YY_BREAK -case YY_STATE_EOF(SECT2PROLOG): -#line 316 "scan.l" -{ - mark_prolog(); - sectnum = 0; - yyterminate(); /* to stop the parser */ - } - YY_BREAK - - -case 89: -YY_RULE_SETUP -#line 324 "scan.l" -++linenum; /* allow blank lines in section 2 */ - YY_BREAK -case 90: -YY_RULE_SETUP -#line 326 "scan.l" -{ - indented_code = false; - doing_codeblock = true; - bracelevel = 1; - BEGIN(PERCENT_BRACE_ACTION); - } - YY_BREAK -case 91: -YY_RULE_SETUP -#line 333 "scan.l" -BEGIN(SC); return '<'; - YY_BREAK -case 92: -YY_RULE_SETUP -#line 334 "scan.l" -return '^'; - YY_BREAK -case 93: -YY_RULE_SETUP -#line 335 "scan.l" -BEGIN(QUOTE); return '"'; - YY_BREAK -case 94: -*yy_cp = yy_hold_char; /* undo effects of setting up yytext */ -yy_c_buf_p = yy_cp = yy_bp + 1; -YY_DO_BEFORE_ACTION; /* set up yytext again */ -YY_RULE_SETUP -#line 336 "scan.l" -BEGIN(NUM); return '{'; - YY_BREAK -case 95: -*yy_cp = yy_hold_char; /* undo effects of setting up yytext */ -yy_c_buf_p = yy_cp = yy_bp + 1; -YY_DO_BEFORE_ACTION; /* set up yytext again */ -YY_RULE_SETUP -#line 337 "scan.l" -return '$'; - YY_BREAK -case 96: -YY_RULE_SETUP -#line 339 "scan.l" -{ - bracelevel = 1; - BEGIN(PERCENT_BRACE_ACTION); - - if ( in_rule ) - { - doing_rule_action = true; - in_rule = false; - return '\n'; - } - } - YY_BREAK -case 97: -YY_RULE_SETUP -#line 350 "scan.l" -continued_action = true; ++linenum; return '\n'; - YY_BREAK -case 98: -YY_RULE_SETUP -#line 352 "scan.l" -{ - yyless( yyleng - 2 ); /* put back '/', '*' */ - bracelevel = 0; - continued_action = false; - BEGIN(ACTION); - } - YY_BREAK -case 99: -YY_RULE_SETUP -#line 359 "scan.l" -/* allow indented rules */ - YY_BREAK -case 100: -YY_RULE_SETUP -#line 361 "scan.l" -{ - /* This rule is separate from the one below because - * otherwise we get variable trailing context, so - * we can't build the scanner using -{f,F}. - */ - bracelevel = 0; - continued_action = false; - BEGIN(ACTION); - - if ( in_rule ) - { - doing_rule_action = true; - in_rule = false; - return '\n'; - } - } - YY_BREAK -case 101: -YY_RULE_SETUP -#line 378 "scan.l" -{ - bracelevel = 0; - continued_action = false; - BEGIN(ACTION); - unput( '\n' ); /* so sees it */ - - if ( in_rule ) - { - doing_rule_action = true; - in_rule = false; - return '\n'; - } - } - YY_BREAK -case 102: -#line 393 "scan.l" -case 103: -YY_RULE_SETUP -#line 393 "scan.l" -return EOF_OP; - YY_BREAK -case 104: -YY_RULE_SETUP -#line 395 "scan.l" -{ - sectnum = 3; - BEGIN(SECT3); - yyterminate(); /* to stop the parser */ - } - YY_BREAK -case 105: -YY_RULE_SETUP -#line 401 "scan.l" -{ - int cclval; - - strcpy( nmstr, yytext ); - - /* Check to see if we've already encountered this - * ccl. - */ - if ( (cclval = ccllookup( (Char *) nmstr )) != 0 ) - { - if ( input() != ']' ) - synerr( _( "bad character class" ) ); - - yylval = cclval; - ++cclreuse; - return PREVCCL; - } - else - { - /* We fudge a bit. We know that this ccl will - * soon be numbered as lastccl + 1 by cclinit. - */ - cclinstal( (Char *) nmstr, lastccl + 1 ); - - /* Push back everything but the leading bracket - * so the ccl can be rescanned. - */ - yyless( 1 ); - - BEGIN(FIRSTCCL); - return '['; - } - } - YY_BREAK -case 106: -YY_RULE_SETUP -#line 435 "scan.l" -{ - register Char *nmdefptr; - Char *ndlookup(); - - strcpy( nmstr, yytext + 1 ); - nmstr[yyleng - 2] = '\0'; /* chop trailing brace */ - - if ( (nmdefptr = ndlookup( nmstr )) == 0 ) - format_synerr( - _( "undefined definition {%s}" ), - nmstr ); - - else - { /* push back name surrounded by ()'s */ - int len = strlen( (char *) nmdefptr ); - - if ( lex_compat || nmdefptr[0] == '^' || - (len > 0 && nmdefptr[len - 1] == '$') ) - { /* don't use ()'s after all */ - PUT_BACK_STRING((char *) nmdefptr, 0); - - if ( nmdefptr[0] == '^' ) - BEGIN(CARETISBOL); - } - - else - { - unput(')'); - PUT_BACK_STRING((char *) nmdefptr, 0); - unput('('); - } - } - } - YY_BREAK -case 107: -YY_RULE_SETUP -#line 469 "scan.l" -return (unsigned char) yytext[0]; - YY_BREAK -case 108: -YY_RULE_SETUP -#line 470 "scan.l" -RETURNCHAR; - YY_BREAK - - -case 109: -YY_RULE_SETUP -#line 475 "scan.l" -return (unsigned char) yytext[0]; - YY_BREAK -case 110: -YY_RULE_SETUP -#line 476 "scan.l" -BEGIN(SECT2); return '>'; - YY_BREAK -case 111: -*yy_cp = yy_hold_char; /* undo effects of setting up yytext */ -yy_c_buf_p = yy_cp = yy_bp + 1; -YY_DO_BEFORE_ACTION; /* set up yytext again */ -YY_RULE_SETUP -#line 477 "scan.l" -BEGIN(CARETISBOL); return '>'; - YY_BREAK -case 112: -YY_RULE_SETUP -#line 478 "scan.l" -RETURNNAME; - YY_BREAK -case 113: -YY_RULE_SETUP -#line 479 "scan.l" -{ - format_synerr( _( "bad : %s" ), - yytext ); - } - YY_BREAK - -case 114: -YY_RULE_SETUP -#line 485 "scan.l" -BEGIN(SECT2); return '^'; - YY_BREAK - -case 115: -YY_RULE_SETUP -#line 489 "scan.l" -RETURNCHAR; - YY_BREAK -case 116: -YY_RULE_SETUP -#line 490 "scan.l" -BEGIN(SECT2); return '"'; - YY_BREAK -case 117: -YY_RULE_SETUP -#line 492 "scan.l" -{ - synerr( _( "missing quote" ) ); - BEGIN(SECT2); - ++linenum; - return '"'; - } - YY_BREAK - - -case 118: -*yy_cp = yy_hold_char; /* undo effects of setting up yytext */ -yy_c_buf_p = yy_cp = yy_bp + 1; -YY_DO_BEFORE_ACTION; /* set up yytext again */ -YY_RULE_SETUP -#line 502 "scan.l" -BEGIN(CCL); return '^'; - YY_BREAK -case 119: -*yy_cp = yy_hold_char; /* undo effects of setting up yytext */ -yy_c_buf_p = yy_cp = yy_bp + 1; -YY_DO_BEFORE_ACTION; /* set up yytext again */ -YY_RULE_SETUP -#line 503 "scan.l" -return '^'; - YY_BREAK -case 120: -YY_RULE_SETUP -#line 504 "scan.l" -BEGIN(CCL); RETURNCHAR; - YY_BREAK - - -case 121: -*yy_cp = yy_hold_char; /* undo effects of setting up yytext */ -yy_c_buf_p = yy_cp = yy_bp + 1; -YY_DO_BEFORE_ACTION; /* set up yytext again */ -YY_RULE_SETUP -#line 508 "scan.l" -return '-'; - YY_BREAK -case 122: -YY_RULE_SETUP -#line 509 "scan.l" -RETURNCHAR; - YY_BREAK -case 123: -YY_RULE_SETUP -#line 510 "scan.l" -BEGIN(SECT2); return ']'; - YY_BREAK -case 124: -YY_RULE_SETUP -#line 511 "scan.l" -{ - synerr( _( "bad character class" ) ); - BEGIN(SECT2); - return ']'; - } - YY_BREAK - - -case 125: -YY_RULE_SETUP -#line 519 "scan.l" -BEGIN(CCL); return CCE_ALNUM; - YY_BREAK -case 126: -YY_RULE_SETUP -#line 520 "scan.l" -BEGIN(CCL); return CCE_ALPHA; - YY_BREAK -case 127: -YY_RULE_SETUP -#line 521 "scan.l" -BEGIN(CCL); return CCE_BLANK; - YY_BREAK -case 128: -YY_RULE_SETUP -#line 522 "scan.l" -BEGIN(CCL); return CCE_CNTRL; - YY_BREAK -case 129: -YY_RULE_SETUP -#line 523 "scan.l" -BEGIN(CCL); return CCE_DIGIT; - YY_BREAK -case 130: -YY_RULE_SETUP -#line 524 "scan.l" -BEGIN(CCL); return CCE_GRAPH; - YY_BREAK -case 131: -YY_RULE_SETUP -#line 525 "scan.l" -BEGIN(CCL); return CCE_LOWER; - YY_BREAK -case 132: -YY_RULE_SETUP -#line 526 "scan.l" -BEGIN(CCL); return CCE_PRINT; - YY_BREAK -case 133: -YY_RULE_SETUP -#line 527 "scan.l" -BEGIN(CCL); return CCE_PUNCT; - YY_BREAK -case 134: -YY_RULE_SETUP -#line 528 "scan.l" -BEGIN(CCL); return CCE_SPACE; - YY_BREAK -case 135: -YY_RULE_SETUP -#line 529 "scan.l" -BEGIN(CCL); return CCE_UPPER; - YY_BREAK -case 136: -YY_RULE_SETUP -#line 530 "scan.l" -BEGIN(CCL); return CCE_XDIGIT; - YY_BREAK -case 137: -YY_RULE_SETUP -#line 531 "scan.l" -{ - format_synerr( - _( "bad character class expression: %s" ), - yytext ); - BEGIN(CCL); return CCE_ALNUM; - } - YY_BREAK - - -case 138: -YY_RULE_SETUP -#line 540 "scan.l" -{ - yylval = myctoi( yytext ); - return NUMBER; - } - YY_BREAK -case 139: -YY_RULE_SETUP -#line 545 "scan.l" -return ','; - YY_BREAK -case 140: -YY_RULE_SETUP -#line 546 "scan.l" -BEGIN(SECT2); return '}'; - YY_BREAK -case 141: -YY_RULE_SETUP -#line 548 "scan.l" -{ - synerr( _( "bad character inside {}'s" ) ); - BEGIN(SECT2); - return '}'; - } - YY_BREAK -case 142: -YY_RULE_SETUP -#line 554 "scan.l" -{ - synerr( _( "missing }" ) ); - BEGIN(SECT2); - ++linenum; - return '}'; - } - YY_BREAK - - -case 143: -YY_RULE_SETUP -#line 564 "scan.l" -bracelevel = 0; - YY_BREAK -case 144: -YY_RULE_SETUP -#line 566 "scan.l" -ACTION_ECHO; yy_push_state( COMMENT ); - YY_BREAK - -case 145: -YY_RULE_SETUP -#line 569 "scan.l" -{ - ACTION_ECHO; - CHECK_REJECT(yytext); - } - YY_BREAK -case 146: -YY_RULE_SETUP -#line 573 "scan.l" -{ - ACTION_ECHO; - CHECK_YYMORE(yytext); - } - YY_BREAK - -case 147: -YY_RULE_SETUP -#line 579 "scan.l" -ACTION_ECHO; - YY_BREAK -case 148: -YY_RULE_SETUP -#line 580 "scan.l" -{ - ++linenum; - ACTION_ECHO; - if ( bracelevel == 0 || - (doing_codeblock && indented_code) ) - { - if ( doing_rule_action ) - add_action( "\tYY_BREAK\n" ); - - doing_rule_action = doing_codeblock = false; - BEGIN(SECT2); - } - } - YY_BREAK - -/* Reject and YYmore() are checked for above, in PERCENT_BRACE_ACTION */ - -case 149: -YY_RULE_SETUP -#line 598 "scan.l" -ACTION_ECHO; ++bracelevel; - YY_BREAK -case 150: -YY_RULE_SETUP -#line 599 "scan.l" -ACTION_ECHO; --bracelevel; - YY_BREAK -case 151: -YY_RULE_SETUP -#line 600 "scan.l" -ACTION_ECHO; - YY_BREAK -case 152: -YY_RULE_SETUP -#line 601 "scan.l" -ACTION_ECHO; - YY_BREAK -case 153: -YY_RULE_SETUP -#line 602 "scan.l" -ACTION_ECHO; /* character constant */ - YY_BREAK -case 154: -YY_RULE_SETUP -#line 603 "scan.l" -ACTION_ECHO; BEGIN(ACTION_STRING); - YY_BREAK -case 155: -YY_RULE_SETUP -#line 604 "scan.l" -{ - ++linenum; - ACTION_ECHO; - if ( bracelevel == 0 ) - { - if ( doing_rule_action ) - add_action( "\tYY_BREAK\n" ); - - doing_rule_action = false; - BEGIN(SECT2); - } - } - YY_BREAK -case 156: -YY_RULE_SETUP -#line 616 "scan.l" -ACTION_ECHO; - YY_BREAK - - -case 157: -YY_RULE_SETUP -#line 620 "scan.l" -ACTION_ECHO; - YY_BREAK -case 158: -YY_RULE_SETUP -#line 621 "scan.l" -ACTION_ECHO; - YY_BREAK -case 159: -YY_RULE_SETUP -#line 622 "scan.l" -++linenum; ACTION_ECHO; - YY_BREAK -case 160: -YY_RULE_SETUP -#line 623 "scan.l" -ACTION_ECHO; BEGIN(ACTION); - YY_BREAK -case 161: -YY_RULE_SETUP -#line 624 "scan.l" -ACTION_ECHO; - YY_BREAK - -case YY_STATE_EOF(COMMENT): -case YY_STATE_EOF(ACTION): -case YY_STATE_EOF(ACTION_STRING): -#line 627 "scan.l" -{ - synerr( _( "EOF encountered inside an action" ) ); - yyterminate(); - } - YY_BREAK -case 162: -YY_RULE_SETUP -#line 633 "scan.l" -{ - yylval = myesc( (Char *) yytext ); - - if ( YY_START == FIRSTCCL ) - BEGIN(CCL); - - return CHAR; - } - YY_BREAK - -case 163: -YY_RULE_SETUP -#line 644 "scan.l" -ECHO; - YY_BREAK -case YY_STATE_EOF(SECT3): -#line 645 "scan.l" -sectnum = 0; yyterminate(); - YY_BREAK - -case 164: -YY_RULE_SETUP -#line 648 "scan.l" -format_synerr( _( "bad character: %s" ), yytext ); - YY_BREAK -case 165: -YY_RULE_SETUP -#line 650 "scan.l" -YY_FATAL_ERROR( "flex scanner jammed" ); - YY_BREAK -#line 2736 "scan.c" -case YY_STATE_EOF(INITIAL): -case YY_STATE_EOF(SECT2): -case YY_STATE_EOF(CODEBLOCK): -case YY_STATE_EOF(PICKUPDEF): -case YY_STATE_EOF(SC): -case YY_STATE_EOF(CARETISBOL): -case YY_STATE_EOF(NUM): -case YY_STATE_EOF(QUOTE): -case YY_STATE_EOF(FIRSTCCL): -case YY_STATE_EOF(CCL): -case YY_STATE_EOF(RECOVER): -case YY_STATE_EOF(PERCENT_BRACE_ACTION): -case YY_STATE_EOF(OPTION): -case YY_STATE_EOF(LINEDIR): - yyterminate(); - - case YY_END_OF_BUFFER: - { - /* Amount of text matched not including the EOB char. */ - int yy_amount_of_matched_text = (int) (yy_cp - yytext_ptr) - 1; - - /* Undo the effects of YY_DO_BEFORE_ACTION. */ - *yy_cp = yy_hold_char; - YY_RESTORE_YY_MORE_OFFSET - - if ( yy_current_buffer->yy_buffer_status == YY_BUFFER_NEW ) - { - /* We're scanning a new file or input source. It's - * possible that this happened because the user - * just pointed yyin at a new source and called - * yylex(). If so, then we have to assure - * consistency between yy_current_buffer and our - * globals. Here is the right place to do so, because - * this is the first action (other than possibly a - * back-up) that will match for the new input source. - */ - yy_n_chars = yy_current_buffer->yy_n_chars; - yy_current_buffer->yy_input_file = yyin; - yy_current_buffer->yy_buffer_status = YY_BUFFER_NORMAL; - } - - /* Note that here we test for yy_c_buf_p "<=" to the position - * of the first EOB in the buffer, since yy_c_buf_p will - * already have been incremented past the NUL character - * (since all states make transitions on EOB to the - * end-of-buffer state). Contrast this with the test - * in input(). - */ - if ( yy_c_buf_p <= &yy_current_buffer->yy_ch_buf[yy_n_chars] ) - { /* This was really a NUL. */ - yy_state_type yy_next_state; - - yy_c_buf_p = yytext_ptr + yy_amount_of_matched_text; - - yy_current_state = yy_get_previous_state(); - - /* Okay, we're now positioned to make the NUL - * transition. We couldn't have - * yy_get_previous_state() go ahead and do it - * for us because it doesn't know how to deal - * with the possibility of jamming (and we don't - * want to build jamming into it because then it - * will run more slowly). - */ - - yy_next_state = yy_try_NUL_trans( yy_current_state ); - - yy_bp = yytext_ptr + YY_MORE_ADJ; - - if ( yy_next_state ) - { - /* Consume the NUL. */ - yy_cp = ++yy_c_buf_p; - yy_current_state = yy_next_state; - goto yy_match; - } - - else - { - yy_cp = yy_c_buf_p; - goto yy_find_action; - } - } - - else switch ( yy_get_next_buffer() ) - { - case EOB_ACT_END_OF_FILE: - { - yy_did_buffer_switch_on_eof = 0; - - if ( yywrap() ) - { - /* Note: because we've taken care in - * yy_get_next_buffer() to have set up - * yytext, we can now set up - * yy_c_buf_p so that if some total - * hoser (like flex itself) wants to - * call the scanner after we return the - * YY_NULL, it'll still work - another - * YY_NULL will get returned. - */ - yy_c_buf_p = yytext_ptr + YY_MORE_ADJ; - - yy_act = YY_STATE_EOF(YY_START); - goto do_action; - } - - else - { - if ( ! yy_did_buffer_switch_on_eof ) - YY_NEW_FILE; - } - break; - } - - case EOB_ACT_CONTINUE_SCAN: - yy_c_buf_p = - yytext_ptr + yy_amount_of_matched_text; - - yy_current_state = yy_get_previous_state(); - - yy_cp = yy_c_buf_p; - yy_bp = yytext_ptr + YY_MORE_ADJ; - goto yy_match; - - case EOB_ACT_LAST_MATCH: - yy_c_buf_p = - &yy_current_buffer->yy_ch_buf[yy_n_chars]; - - yy_current_state = yy_get_previous_state(); - - yy_cp = yy_c_buf_p; - yy_bp = yytext_ptr + YY_MORE_ADJ; - goto yy_find_action; - } - break; - } - - default: - YY_FATAL_ERROR( - "fatal flex scanner internal error--no action found" ); - } /* end of action switch */ - } /* end of scanning one token */ - } /* end of yylex */ - - -/* yy_get_next_buffer - try to read in a new buffer - * - * Returns a code representing an action: - * EOB_ACT_LAST_MATCH - - * EOB_ACT_CONTINUE_SCAN - continue scanning from current position - * EOB_ACT_END_OF_FILE - end of file - */ - -static int yy_get_next_buffer() - { - register char *dest = yy_current_buffer->yy_ch_buf; - register char *source = yytext_ptr; - register int number_to_move, i; - int ret_val; - - if ( yy_c_buf_p > &yy_current_buffer->yy_ch_buf[yy_n_chars + 1] ) - YY_FATAL_ERROR( - "fatal flex scanner internal error--end of buffer missed" ); - - if ( yy_current_buffer->yy_fill_buffer == 0 ) - { /* Don't try to fill the buffer, so this is an EOF. */ - if ( yy_c_buf_p - yytext_ptr - YY_MORE_ADJ == 1 ) - { - /* We matched a single character, the EOB, so - * treat this as a final EOF. - */ - return EOB_ACT_END_OF_FILE; - } - - else - { - /* We matched some text prior to the EOB, first - * process it. - */ - return EOB_ACT_LAST_MATCH; - } - } - - /* Try to read more data. */ - - /* First move last chars to start of buffer. */ - number_to_move = (int) (yy_c_buf_p - yytext_ptr) - 1; - - for ( i = 0; i < number_to_move; ++i ) - *(dest++) = *(source++); - - if ( yy_current_buffer->yy_buffer_status == YY_BUFFER_EOF_PENDING ) - /* don't do the read, it's not guaranteed to return an EOF, - * just force an EOF - */ - yy_current_buffer->yy_n_chars = yy_n_chars = 0; - - else - { - int num_to_read = - yy_current_buffer->yy_buf_size - number_to_move - 1; - - while ( num_to_read <= 0 ) - { /* Not enough room in the buffer - grow it. */ -#ifdef YY_USES_REJECT - YY_FATAL_ERROR( -"input buffer overflow, can't enlarge buffer because scanner uses REJECT" ); -#else - - /* just a shorter name for the current buffer */ - YY_BUFFER_STATE b = yy_current_buffer; - - int yy_c_buf_p_offset = - (int) (yy_c_buf_p - b->yy_ch_buf); - - if ( b->yy_is_our_buffer ) - { - int new_size = b->yy_buf_size * 2; - - if ( new_size <= 0 ) - b->yy_buf_size += b->yy_buf_size / 8; - else - b->yy_buf_size *= 2; - - b->yy_ch_buf = (char *) - /* Include room in for 2 EOB chars. */ - yy_flex_realloc( (void *) b->yy_ch_buf, - b->yy_buf_size + 2 ); - } - else - /* Can't grow it, we don't own it. */ - b->yy_ch_buf = 0; - - if ( ! b->yy_ch_buf ) - YY_FATAL_ERROR( - "fatal error - scanner input buffer overflow" ); - - yy_c_buf_p = &b->yy_ch_buf[yy_c_buf_p_offset]; - - num_to_read = yy_current_buffer->yy_buf_size - - number_to_move - 1; -#endif - } - - if ( num_to_read > YY_READ_BUF_SIZE ) - num_to_read = YY_READ_BUF_SIZE; - - /* Read in more data. */ - YY_INPUT( (&yy_current_buffer->yy_ch_buf[number_to_move]), - yy_n_chars, num_to_read ); - - yy_current_buffer->yy_n_chars = yy_n_chars; - } - - if ( yy_n_chars == 0 ) - { - if ( number_to_move == YY_MORE_ADJ ) - { - ret_val = EOB_ACT_END_OF_FILE; - yyrestart( yyin ); - } - - else - { - ret_val = EOB_ACT_LAST_MATCH; - yy_current_buffer->yy_buffer_status = - YY_BUFFER_EOF_PENDING; - } - } - - else - ret_val = EOB_ACT_CONTINUE_SCAN; - - yy_n_chars += number_to_move; - yy_current_buffer->yy_ch_buf[yy_n_chars] = YY_END_OF_BUFFER_CHAR; - yy_current_buffer->yy_ch_buf[yy_n_chars + 1] = YY_END_OF_BUFFER_CHAR; - - yytext_ptr = &yy_current_buffer->yy_ch_buf[0]; - - return ret_val; - } - - -/* yy_get_previous_state - get the state just before the EOB char was reached */ - -static yy_state_type yy_get_previous_state() - { - register yy_state_type yy_current_state; - register char *yy_cp; - - yy_current_state = yy_start; - yy_current_state += YY_AT_BOL(); - - for ( yy_cp = yytext_ptr + YY_MORE_ADJ; yy_cp < yy_c_buf_p; ++yy_cp ) - { - register YY_CHAR yy_c = (*yy_cp ? yy_ec[YY_SC_TO_UI(*yy_cp)] : 1); - if ( yy_accept[yy_current_state] ) - { - yy_last_accepting_state = yy_current_state; - yy_last_accepting_cpos = yy_cp; - } - while ( yy_chk[yy_base[yy_current_state] + yy_c] != yy_current_state ) - { - yy_current_state = (int) yy_def[yy_current_state]; - if ( yy_current_state >= 769 ) - yy_c = yy_meta[(unsigned int) yy_c]; - } - yy_current_state = yy_nxt[yy_base[yy_current_state] + (unsigned int) yy_c]; - } - - return yy_current_state; - } - - -/* yy_try_NUL_trans - try to make a transition on the NUL character - * - * synopsis - * next_state = yy_try_NUL_trans( current_state ); - */ - -#ifdef YY_USE_PROTOS -static yy_state_type yy_try_NUL_trans( yy_state_type yy_current_state ) -#else -static yy_state_type yy_try_NUL_trans( yy_current_state ) -yy_state_type yy_current_state; -#endif - { - register int yy_is_jam; - register char *yy_cp = yy_c_buf_p; - - register YY_CHAR yy_c = 1; - if ( yy_accept[yy_current_state] ) - { - yy_last_accepting_state = yy_current_state; - yy_last_accepting_cpos = yy_cp; - } - while ( yy_chk[yy_base[yy_current_state] + yy_c] != yy_current_state ) - { - yy_current_state = (int) yy_def[yy_current_state]; - if ( yy_current_state >= 769 ) - yy_c = yy_meta[(unsigned int) yy_c]; - } - yy_current_state = yy_nxt[yy_base[yy_current_state] + (unsigned int) yy_c]; - yy_is_jam = (yy_current_state == 768); - - return yy_is_jam ? 0 : yy_current_state; - } - - -#ifndef YY_NO_UNPUT -#ifdef YY_USE_PROTOS -static void yyunput( int c, register char *yy_bp ) -#else -static void yyunput( c, yy_bp ) -int c; -register char *yy_bp; -#endif - { - register char *yy_cp = yy_c_buf_p; - - /* undo effects of setting up yytext */ - *yy_cp = yy_hold_char; - - if ( yy_cp < yy_current_buffer->yy_ch_buf + 2 ) - { /* need to shift things up to make room */ - /* +2 for EOB chars. */ - register int number_to_move = yy_n_chars + 2; - register char *dest = &yy_current_buffer->yy_ch_buf[ - yy_current_buffer->yy_buf_size + 2]; - register char *source = - &yy_current_buffer->yy_ch_buf[number_to_move]; - - while ( source > yy_current_buffer->yy_ch_buf ) - *--dest = *--source; - - yy_cp += (int) (dest - source); - yy_bp += (int) (dest - source); - yy_current_buffer->yy_n_chars = - yy_n_chars = yy_current_buffer->yy_buf_size; - - if ( yy_cp < yy_current_buffer->yy_ch_buf + 2 ) - YY_FATAL_ERROR( "flex scanner push-back overflow" ); - } - - *--yy_cp = (char) c; - - - yytext_ptr = yy_bp; - yy_hold_char = *yy_cp; - yy_c_buf_p = yy_cp; - } -#endif /* ifndef YY_NO_UNPUT */ - - -#ifdef __cplusplus -static int yyinput() -#else -static int input() -#endif - { - int c; - - *yy_c_buf_p = yy_hold_char; - - if ( *yy_c_buf_p == YY_END_OF_BUFFER_CHAR ) - { - /* yy_c_buf_p now points to the character we want to return. - * If this occurs *before* the EOB characters, then it's a - * valid NUL; if not, then we've hit the end of the buffer. - */ - if ( yy_c_buf_p < &yy_current_buffer->yy_ch_buf[yy_n_chars] ) - /* This was really a NUL. */ - *yy_c_buf_p = '\0'; - - else - { /* need more input */ - int offset = yy_c_buf_p - yytext_ptr; - ++yy_c_buf_p; - - switch ( yy_get_next_buffer() ) - { - case EOB_ACT_LAST_MATCH: - /* This happens because yy_g_n_b() - * sees that we've accumulated a - * token and flags that we need to - * try matching the token before - * proceeding. But for input(), - * there's no matching to consider. - * So convert the EOB_ACT_LAST_MATCH - * to EOB_ACT_END_OF_FILE. - */ - - /* Reset buffer status. */ - yyrestart( yyin ); - - /* fall through */ - - case EOB_ACT_END_OF_FILE: - { - if ( yywrap() ) - return EOF; - - if ( ! yy_did_buffer_switch_on_eof ) - YY_NEW_FILE; -#ifdef __cplusplus - return yyinput(); -#else - return input(); -#endif - } - - case EOB_ACT_CONTINUE_SCAN: - yy_c_buf_p = yytext_ptr + offset; - break; - } - } - } - - c = *(unsigned char *) yy_c_buf_p; /* cast for 8-bit char's */ - *yy_c_buf_p = '\0'; /* preserve yytext */ - yy_hold_char = *++yy_c_buf_p; - - yy_current_buffer->yy_at_bol = (c == '\n'); - - return c; - } - - -#ifdef YY_USE_PROTOS -void yyrestart( FILE *input_file ) -#else -void yyrestart( input_file ) -FILE *input_file; -#endif - { - if ( ! yy_current_buffer ) - yy_current_buffer = yy_create_buffer( yyin, YY_BUF_SIZE ); - - yy_init_buffer( yy_current_buffer, input_file ); - yy_load_buffer_state(); - } - - -#ifdef YY_USE_PROTOS -void yy_switch_to_buffer( YY_BUFFER_STATE new_buffer ) -#else -void yy_switch_to_buffer( new_buffer ) -YY_BUFFER_STATE new_buffer; -#endif - { - if ( yy_current_buffer == new_buffer ) - return; - - if ( yy_current_buffer ) - { - /* Flush out information for old buffer. */ - *yy_c_buf_p = yy_hold_char; - yy_current_buffer->yy_buf_pos = yy_c_buf_p; - yy_current_buffer->yy_n_chars = yy_n_chars; - } - - yy_current_buffer = new_buffer; - yy_load_buffer_state(); - - /* We don't actually know whether we did this switch during - * EOF (yywrap()) processing, but the only time this flag - * is looked at is after yywrap() is called, so it's safe - * to go ahead and always set it. - */ - yy_did_buffer_switch_on_eof = 1; - } - - -#ifdef YY_USE_PROTOS -void yy_load_buffer_state( void ) -#else -void yy_load_buffer_state() -#endif - { - yy_n_chars = yy_current_buffer->yy_n_chars; - yytext_ptr = yy_c_buf_p = yy_current_buffer->yy_buf_pos; - yyin = yy_current_buffer->yy_input_file; - yy_hold_char = *yy_c_buf_p; - } - - -#ifdef YY_USE_PROTOS -YY_BUFFER_STATE yy_create_buffer( FILE *file, int size ) -#else -YY_BUFFER_STATE yy_create_buffer( file, size ) -FILE *file; -int size; -#endif - { - YY_BUFFER_STATE b; - - b = (YY_BUFFER_STATE) yy_flex_alloc( sizeof( struct yy_buffer_state ) ); - if ( ! b ) - YY_FATAL_ERROR( "out of dynamic memory in yy_create_buffer()" ); - - b->yy_buf_size = size; - - /* yy_ch_buf has to be 2 characters longer than the size given because - * we need to put in 2 end-of-buffer characters. - */ - b->yy_ch_buf = (char *) yy_flex_alloc( b->yy_buf_size + 2 ); - if ( ! b->yy_ch_buf ) - YY_FATAL_ERROR( "out of dynamic memory in yy_create_buffer()" ); - - b->yy_is_our_buffer = 1; - - yy_init_buffer( b, file ); - - return b; - } - - -#ifdef YY_USE_PROTOS -void yy_delete_buffer( YY_BUFFER_STATE b ) -#else -void yy_delete_buffer( b ) -YY_BUFFER_STATE b; -#endif - { - if ( ! b ) - return; - - if ( b == yy_current_buffer ) - yy_current_buffer = (YY_BUFFER_STATE) 0; - - if ( b->yy_is_our_buffer ) - yy_flex_free( (void *) b->yy_ch_buf ); - - yy_flex_free( (void *) b ); - } - - -#ifndef YY_ALWAYS_INTERACTIVE -#ifndef YY_NEVER_INTERACTIVE -extern int isatty YY_PROTO(( int )); -#endif -#endif - -#ifdef YY_USE_PROTOS -void yy_init_buffer( YY_BUFFER_STATE b, FILE *file ) -#else -void yy_init_buffer( b, file ) -YY_BUFFER_STATE b; -FILE *file; -#endif - - - { - yy_flush_buffer( b ); - - b->yy_input_file = file; - b->yy_fill_buffer = 1; - -#if YY_ALWAYS_INTERACTIVE - b->yy_is_interactive = 1; -#else -#if YY_NEVER_INTERACTIVE - b->yy_is_interactive = 0; -#else - b->yy_is_interactive = file ? (isatty( fileno(file) ) > 0) : 0; -#endif -#endif - } - - -#ifdef YY_USE_PROTOS -void yy_flush_buffer( YY_BUFFER_STATE b ) -#else -void yy_flush_buffer( b ) -YY_BUFFER_STATE b; -#endif - - { - if ( ! b ) - return; - - b->yy_n_chars = 0; - - /* We always need two end-of-buffer characters. The first causes - * a transition to the end-of-buffer state. The second causes - * a jam in that state. - */ - b->yy_ch_buf[0] = YY_END_OF_BUFFER_CHAR; - b->yy_ch_buf[1] = YY_END_OF_BUFFER_CHAR; - - b->yy_buf_pos = &b->yy_ch_buf[0]; - - b->yy_at_bol = 1; - b->yy_buffer_status = YY_BUFFER_NEW; - - if ( b == yy_current_buffer ) - yy_load_buffer_state(); - } - - -#ifndef YY_NO_SCAN_BUFFER -#ifdef YY_USE_PROTOS -YY_BUFFER_STATE yy_scan_buffer( char *base, yy_size_t size ) -#else -YY_BUFFER_STATE yy_scan_buffer( base, size ) -char *base; -yy_size_t size; -#endif - { - YY_BUFFER_STATE b; - - if ( size < 2 || - base[size-2] != YY_END_OF_BUFFER_CHAR || - base[size-1] != YY_END_OF_BUFFER_CHAR ) - /* They forgot to leave room for the EOB's. */ - return 0; - - b = (YY_BUFFER_STATE) yy_flex_alloc( sizeof( struct yy_buffer_state ) ); - if ( ! b ) - YY_FATAL_ERROR( "out of dynamic memory in yy_scan_buffer()" ); - - b->yy_buf_size = size - 2; /* "- 2" to take care of EOB's */ - b->yy_buf_pos = b->yy_ch_buf = base; - b->yy_is_our_buffer = 0; - b->yy_input_file = 0; - b->yy_n_chars = b->yy_buf_size; - b->yy_is_interactive = 0; - b->yy_at_bol = 1; - b->yy_fill_buffer = 0; - b->yy_buffer_status = YY_BUFFER_NEW; - - yy_switch_to_buffer( b ); - - return b; - } -#endif - - -#ifndef YY_NO_SCAN_STRING -#ifdef YY_USE_PROTOS -YY_BUFFER_STATE yy_scan_string( yyconst char *yy_str ) -#else -YY_BUFFER_STATE yy_scan_string( yy_str ) -yyconst char *yy_str; -#endif - { - int len; - for ( len = 0; yy_str[len]; ++len ) - ; - - return yy_scan_bytes( yy_str, len ); - } -#endif - - -#ifndef YY_NO_SCAN_BYTES -#ifdef YY_USE_PROTOS -YY_BUFFER_STATE yy_scan_bytes( yyconst char *bytes, int len ) -#else -YY_BUFFER_STATE yy_scan_bytes( bytes, len ) -yyconst char *bytes; -int len; -#endif - { - YY_BUFFER_STATE b; - char *buf; - yy_size_t n; - int i; - - /* Get memory for full buffer, including space for trailing EOB's. */ - n = len + 2; - buf = (char *) yy_flex_alloc( n ); - if ( ! buf ) - YY_FATAL_ERROR( "out of dynamic memory in yy_scan_bytes()" ); - - for ( i = 0; i < len; ++i ) - buf[i] = bytes[i]; - - buf[len] = buf[len+1] = YY_END_OF_BUFFER_CHAR; - - b = yy_scan_buffer( buf, n ); - if ( ! b ) - YY_FATAL_ERROR( "bad buffer in yy_scan_bytes()" ); - - /* It's okay to grow etc. this buffer, and we should throw it - * away when we're done. - */ - b->yy_is_our_buffer = 1; - - return b; - } -#endif - - -#ifndef YY_NO_PUSH_STATE -#ifdef YY_USE_PROTOS -static void yy_push_state( int new_state ) -#else -static void yy_push_state( new_state ) -int new_state; -#endif - { - if ( yy_start_stack_ptr >= yy_start_stack_depth ) - { - yy_size_t new_size; - - yy_start_stack_depth += YY_START_STACK_INCR; - new_size = yy_start_stack_depth * sizeof( int ); - - if ( ! yy_start_stack ) - yy_start_stack = (int *) yy_flex_alloc( new_size ); - - else - yy_start_stack = (int *) yy_flex_realloc( - (void *) yy_start_stack, new_size ); - - if ( ! yy_start_stack ) - YY_FATAL_ERROR( - "out of memory expanding start-condition stack" ); - } - - yy_start_stack[yy_start_stack_ptr++] = YY_START; - - BEGIN(new_state); - } -#endif - - -#ifndef YY_NO_POP_STATE -static void yy_pop_state() - { - if ( --yy_start_stack_ptr < 0 ) - YY_FATAL_ERROR( "start-condition stack underflow" ); - - BEGIN(yy_start_stack[yy_start_stack_ptr]); - } -#endif - - -#ifndef YY_NO_TOP_STATE -static int yy_top_state() - { - return yy_start_stack[yy_start_stack_ptr - 1]; - } -#endif - -#ifndef YY_EXIT_FAILURE -#define YY_EXIT_FAILURE 2 -#endif - -#ifdef YY_USE_PROTOS -static void yy_fatal_error( yyconst char msg[] ) -#else -static void yy_fatal_error( msg ) -char msg[]; -#endif - { - (void) fprintf( stderr, "%s\n", msg ); - exit( YY_EXIT_FAILURE ); - } - - - -/* Redefine yyless() so it works in section 3 code. */ - -#undef yyless -#define yyless(n) \ - do \ - { \ - /* Undo effects of setting up yytext. */ \ - yytext[yyleng] = yy_hold_char; \ - yy_c_buf_p = yytext + n; \ - yy_hold_char = *yy_c_buf_p; \ - *yy_c_buf_p = '\0'; \ - yyleng = n; \ - } \ - while ( 0 ) - - -/* Internal utility routines. */ - -#ifndef yytext_ptr -#ifdef YY_USE_PROTOS -static void yy_flex_strncpy( char *s1, yyconst char *s2, int n ) -#else -static void yy_flex_strncpy( s1, s2, n ) -char *s1; -yyconst char *s2; -int n; -#endif - { - register int i; - for ( i = 0; i < n; ++i ) - s1[i] = s2[i]; - } -#endif - -#ifdef YY_NEED_STRLEN -#ifdef YY_USE_PROTOS -static int yy_flex_strlen( yyconst char *s ) -#else -static int yy_flex_strlen( s ) -yyconst char *s; -#endif - { - register int n; - for ( n = 0; s[n]; ++n ) - ; - - return n; - } -#endif - - -#ifdef YY_USE_PROTOS -static void *yy_flex_alloc( yy_size_t size ) -#else -static void *yy_flex_alloc( size ) -yy_size_t size; -#endif - { - return (void *) malloc( size ); - } - -#ifdef YY_USE_PROTOS -static void *yy_flex_realloc( void *ptr, yy_size_t size ) -#else -static void *yy_flex_realloc( ptr, size ) -void *ptr; -yy_size_t size; -#endif - { - /* The cast to (char *) in the following accommodates both - * implementations that use char* generic pointers, and those - * that use void* generic pointers. It works with the latter - * because both ANSI C and C++ allow castless assignment from - * any pointer type to void*, and deal with argument conversions - * as though doing an assignment. - */ - return (void *) realloc( (char *) ptr, size ); - } - -#ifdef YY_USE_PROTOS -static void yy_flex_free( void *ptr ) -#else -static void yy_flex_free( ptr ) -void *ptr; -#endif - { - free( ptr ); - } - -#if YY_MAIN -int main() - { - yylex(); - return 0; - } -#endif -#line 650 "scan.l" - - - -int yywrap() - { - if ( --num_input_files > 0 ) - { - set_input_file( *++input_files ); - return 0; - } - - else - return 1; - } - - -/* set_input_file - open the given file (if NULL, stdin) for scanning */ - -void set_input_file( file ) -char *file; - { - if ( file && strcmp( file, "-" ) ) - { - infilename = copy_string( file ); - yyin = fopen( infilename, "r" ); - - if ( yyin == NULL ) - lerrsf( _( "can't open %s" ), file ); - } - - else - { - yyin = stdin; - infilename = copy_string( "" ); - } - - linenum = 1; - } - - -/* Wrapper routines for accessing the scanner's malloc routines. */ - -void *flex_alloc( size ) -size_t size; - { - return (void *) malloc( size ); - } - -void *flex_realloc( ptr, size ) -void *ptr; -size_t size; - { - return (void *) realloc( ptr, size ); - } - -void flex_free( ptr ) -void *ptr; - { - if ( ptr ) - free( ptr ); - } diff --git a/commands/flex-2.5.4/install.sh b/commands/flex-2.5.4/install.sh deleted file mode 100755 index 0ff4b6a08..000000000 --- a/commands/flex-2.5.4/install.sh +++ /dev/null @@ -1,119 +0,0 @@ -#!/bin/sh - -# -# install - install a program, script, or datafile -# This comes from X11R5; it is not part of GNU. -# -# $XConsortium: install.sh,v 1.2 89/12/18 14:47:22 jim Exp $ -# -# This script is compatible with the BSD install script, but was written -# from scratch. -# - - -# set DOITPROG to echo to test this script - -# Don't use :- since 4.3BSD and earlier shells don't like it. -doit="${DOITPROG-}" - - -# put in absolute paths if you don't have them in your path; or use env. vars. - -mvprog="${MVPROG-mv}" -cpprog="${CPPROG-cp}" -chmodprog="${CHMODPROG-chmod}" -chownprog="${CHOWNPROG-chown}" -chgrpprog="${CHGRPPROG-chgrp}" -stripprog="${STRIPPROG-strip}" -rmprog="${RMPROG-rm}" - -instcmd="$mvprog" -chmodcmd="" -chowncmd="" -chgrpcmd="" -stripcmd="" -rmcmd="$rmprog -f" -mvcmd="$mvprog" -src="" -dst="" - -while [ x"$1" != x ]; do - case $1 in - -c) instcmd="$cpprog" - shift - continue;; - - -m) chmodcmd="$chmodprog $2" - shift - shift - continue;; - - -o) chowncmd="$chownprog $2" - shift - shift - continue;; - - -g) chgrpcmd="$chgrpprog $2" - shift - shift - continue;; - - -s) stripcmd="$stripprog" - shift - continue;; - - *) if [ x"$src" = x ] - then - src=$1 - else - dst=$1 - fi - shift - continue;; - esac -done - -if [ x"$src" = x ] -then - echo "install: no input file specified" - exit 1 -fi - -if [ x"$dst" = x ] -then - echo "install: no destination specified" - exit 1 -fi - - -# If destination is a directory, append the input filename; if your system -# does not like double slashes in filenames, you may need to add some logic - -if [ -d $dst ] -then - dst="$dst"/`basename $src` -fi - -# Make a temp file name in the proper directory. - -dstdir=`dirname $dst` -dsttmp=$dstdir/#inst.$$# - -# Move or copy the file name to the temp name - -$doit $instcmd $src $dsttmp - -# and set any options; do chmod last to preserve setuid bits - -if [ x"$chowncmd" != x ]; then $doit $chowncmd $dsttmp; fi -if [ x"$chgrpcmd" != x ]; then $doit $chgrpcmd $dsttmp; fi -if [ x"$stripcmd" != x ]; then $doit $stripcmd $dsttmp; fi -if [ x"$chmodcmd" != x ]; then $doit $chmodcmd $dsttmp; fi - -# Now rename the file to the real destination. - -$doit $rmcmd $dst -$doit $mvcmd $dsttmp $dst - - -exit 0 diff --git a/commands/flex-2.5.4/libmain.c b/commands/flex-2.5.4/libmain.c deleted file mode 100644 index 079e1eb6a..000000000 --- a/commands/flex-2.5.4/libmain.c +++ /dev/null @@ -1,15 +0,0 @@ -/* libmain - flex run-time support library "main" function */ - -/* $Header$ */ - -extern int yylex(); - -int main( argc, argv ) -int argc; -char *argv[]; - { - while ( yylex() != 0 ) - ; - - return 0; - } diff --git a/commands/flex-2.5.4/libyywrap.c b/commands/flex-2.5.4/libyywrap.c deleted file mode 100644 index aa2cb1376..000000000 --- a/commands/flex-2.5.4/libyywrap.c +++ /dev/null @@ -1,8 +0,0 @@ -/* libyywrap - flex run-time support library "yywrap" function */ - -/* $Header$ */ - -int yywrap() - { - return 1; - } diff --git a/commands/flex-2.5.4/main.c b/commands/flex-2.5.4/main.c deleted file mode 100644 index 23fd81799..000000000 --- a/commands/flex-2.5.4/main.c +++ /dev/null @@ -1,1177 +0,0 @@ -/* flex - tool to generate fast lexical analyzers */ - -/*- - * Copyright (c) 1990 The Regents of the University of California. - * All rights reserved. - * - * This code is derived from software contributed to Berkeley by - * Vern Paxson. - * - * The United States Government has rights in this work pursuant - * to contract no. DE-AC03-76SF00098 between the United States - * Department of Energy and the University of California. - * - * Redistribution and use in source and binary forms with or without - * modification are permitted provided that: (1) source distributions retain - * this entire copyright notice and comment, and (2) distributions including - * binaries display the following acknowledgement: ``This product includes - * software developed by the University of California, Berkeley and its - * contributors'' in the documentation or other materials provided with the - * distribution and in all advertising materials mentioning features or use - * of this software. Neither the name of the University nor the names of - * its contributors may be used to endorse or promote products derived from - * this software without specific prior written permission. - * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED - * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF - * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. - */ - -#ifndef lint -char copyright[] = -"@(#) Copyright (c) 1990 The Regents of the University of California.\n\ - All rights reserved.\n"; -#endif /* not lint */ - -/* $Header$ */ - - -#include "flexdef.h" -#include "version.h" - -static char flex_version[] = FLEX_VERSION; - - -/* declare functions that have forward references */ - -void flexinit PROTO((int, char**)); -void readin PROTO((void)); -void set_up_initial_allocations PROTO((void)); - -#ifdef NEED_ARGV_FIXUP -extern void argv_fixup PROTO((int *, char ***)); -#endif - - -/* these globals are all defined and commented in flexdef.h */ -int printstats, syntaxerror, eofseen, ddebug, trace, nowarn, spprdflt; -int interactive, caseins, lex_compat, do_yylineno, useecs, fulltbl, usemecs; -int fullspd, gen_line_dirs, performance_report, backing_up_report; -int C_plus_plus, long_align, use_read, yytext_is_array, do_yywrap, csize; -int yymore_used, reject, real_reject, continued_action, in_rule; -int yymore_really_used, reject_really_used; -int datapos, dataline, linenum, out_linenum; -FILE *skelfile = NULL; -int skel_ind = 0; -char *action_array; -int action_size, defs1_offset, prolog_offset, action_offset, action_index; -char *infilename = NULL, *outfilename = NULL; -int did_outfilename; -char *prefix, *yyclass; -int do_stdinit, use_stdout; -int onestate[ONE_STACK_SIZE], onesym[ONE_STACK_SIZE]; -int onenext[ONE_STACK_SIZE], onedef[ONE_STACK_SIZE], onesp; -int current_mns, current_max_rules; -int num_rules, num_eof_rules, default_rule, lastnfa; -int *firstst, *lastst, *finalst, *transchar, *trans1, *trans2; -int *accptnum, *assoc_rule, *state_type; -int *rule_type, *rule_linenum, *rule_useful; -int current_state_type; -int variable_trailing_context_rules; -int numtemps, numprots, protprev[MSP], protnext[MSP], prottbl[MSP]; -int protcomst[MSP], firstprot, lastprot, protsave[PROT_SAVE_SIZE]; -int numecs, nextecm[CSIZE + 1], ecgroup[CSIZE + 1], nummecs, tecfwd[CSIZE + 1]; -int tecbck[CSIZE + 1]; -int lastsc, *scset, *scbol, *scxclu, *sceof; -int current_max_scs; -char **scname; -int current_max_dfa_size, current_max_xpairs; -int current_max_template_xpairs, current_max_dfas; -int lastdfa, *nxt, *chk, *tnxt; -int *base, *def, *nultrans, NUL_ec, tblend, firstfree, **dss, *dfasiz; -union dfaacc_union *dfaacc; -int *accsiz, *dhash, numas; -int numsnpairs, jambase, jamstate; -int lastccl, *cclmap, *ccllen, *cclng, cclreuse; -int current_maxccls, current_max_ccl_tbl_size; -Char *ccltbl; -char nmstr[MAXLINE]; -int sectnum, nummt, hshcol, dfaeql, numeps, eps2, num_reallocs; -int tmpuses, totnst, peakpairs, numuniq, numdup, hshsave; -int num_backing_up, bol_needed; -FILE *backing_up_file; -int end_of_buffer_state; -char **input_files; -int num_input_files; - -/* Make sure program_name is initialized so we don't crash if writing - * out an error message before getting the program name from argv[0]. - */ -char *program_name = "flex"; - -#ifndef SHORT_FILE_NAMES -static char *outfile_template = "lex.%s.%s"; -static char *backing_name = "lex.backup"; -#else -static char *outfile_template = "lex%s.%s"; -static char *backing_name = "lex.bck"; -#endif - -#ifdef THINK_C -#include -#endif - -#ifdef MS_DOS -extern unsigned _stklen = 16384; -#endif - -static char outfile_path[MAXLINE]; -static int outfile_created = 0; -static char *skelname = NULL; - - -int main( argc, argv ) -int argc; -char **argv; - { - int i; - -#ifdef THINK_C - argc = ccommand( &argv ); -#endif -#ifdef NEED_ARGV_FIXUP - argv_fixup( &argc, &argv ); -#endif - - flexinit( argc, argv ); - - readin(); - - ntod(); - - for ( i = 1; i <= num_rules; ++i ) - if ( ! rule_useful[i] && i != default_rule ) - line_warning( _( "rule cannot be matched" ), - rule_linenum[i] ); - - if ( spprdflt && ! reject && rule_useful[default_rule] ) - line_warning( - _( "-s option given but default rule can be matched" ), - rule_linenum[default_rule] ); - - /* Generate the C state transition tables from the DFA. */ - make_tables(); - - /* Note, flexend does not return. It exits with its argument - * as status. - */ - flexend( 0 ); - - return 0; /* keep compilers/lint happy */ - } - - -/* check_options - check user-specified options */ - -void check_options() - { - int i; - - if ( lex_compat ) - { - if ( C_plus_plus ) - flexerror( _( "Can't use -+ with -l option" ) ); - - if ( fulltbl || fullspd ) - flexerror( _( "Can't use -f or -F with -l option" ) ); - - /* Don't rely on detecting use of yymore() and REJECT, - * just assume they'll be used. - */ - yymore_really_used = reject_really_used = true; - - yytext_is_array = true; - do_yylineno = true; - use_read = false; - } - - if ( do_yylineno ) - /* This should really be "maintain_backup_tables = true" */ - reject_really_used = true; - - if ( csize == unspecified ) - { - if ( (fulltbl || fullspd) && ! useecs ) - csize = DEFAULT_CSIZE; - else - csize = CSIZE; - } - - if ( interactive == unspecified ) - { - if ( fulltbl || fullspd ) - interactive = false; - else - interactive = true; - } - - if ( fulltbl || fullspd ) - { - if ( usemecs ) - flexerror( - _( "-Cf/-CF and -Cm don't make sense together" ) ); - - if ( interactive ) - flexerror( _( "-Cf/-CF and -I are incompatible" ) ); - - if ( lex_compat ) - flexerror( - _( "-Cf/-CF are incompatible with lex-compatibility mode" ) ); - - if ( do_yylineno ) - flexerror( - _( "-Cf/-CF and %option yylineno are incompatible" ) ); - - if ( fulltbl && fullspd ) - flexerror( _( "-Cf and -CF are mutually exclusive" ) ); - } - - if ( C_plus_plus && fullspd ) - flexerror( _( "Can't use -+ with -CF option" ) ); - - if ( C_plus_plus && yytext_is_array ) - { - warn( _( "%array incompatible with -+ option" ) ); - yytext_is_array = false; - } - - if ( useecs ) - { /* Set up doubly-linked equivalence classes. */ - - /* We loop all the way up to csize, since ecgroup[csize] is - * the position used for NUL characters. - */ - ecgroup[1] = NIL; - - for ( i = 2; i <= csize; ++i ) - { - ecgroup[i] = i - 1; - nextecm[i - 1] = i; - } - - nextecm[csize] = NIL; - } - - else - { - /* Put everything in its own equivalence class. */ - for ( i = 1; i <= csize; ++i ) - { - ecgroup[i] = i; - nextecm[i] = BAD_SUBSCRIPT; /* to catch errors */ - } - } - - if ( ! use_stdout ) - { - FILE *prev_stdout; - - if ( ! did_outfilename ) - { - char *suffix; - - if ( C_plus_plus ) - suffix = "cc"; - else - suffix = "c"; - - sprintf( outfile_path, outfile_template, - prefix, suffix ); - - outfilename = outfile_path; - } - - prev_stdout = freopen( outfilename, "w", stdout ); - - if ( prev_stdout == NULL ) - lerrsf( _( "could not create %s" ), outfilename ); - - outfile_created = 1; - } - - if ( skelname && (skelfile = fopen( skelname, "r" )) == NULL ) - lerrsf( _( "can't open skeleton file %s" ), skelname ); - - if ( strcmp( prefix, "yy" ) ) - { -#define GEN_PREFIX(name) out_str3( "#define yy%s %s%s\n", name, prefix, name ) - if ( C_plus_plus ) - GEN_PREFIX( "FlexLexer" ); - else - { - GEN_PREFIX( "_create_buffer" ); - GEN_PREFIX( "_delete_buffer" ); - GEN_PREFIX( "_scan_buffer" ); - GEN_PREFIX( "_scan_string" ); - GEN_PREFIX( "_scan_bytes" ); - GEN_PREFIX( "_flex_debug" ); - GEN_PREFIX( "_init_buffer" ); - GEN_PREFIX( "_flush_buffer" ); - GEN_PREFIX( "_load_buffer_state" ); - GEN_PREFIX( "_switch_to_buffer" ); - GEN_PREFIX( "in" ); - GEN_PREFIX( "leng" ); - GEN_PREFIX( "lex" ); - GEN_PREFIX( "out" ); - GEN_PREFIX( "restart" ); - GEN_PREFIX( "text" ); - - if ( do_yylineno ) - GEN_PREFIX( "lineno" ); - } - - if ( do_yywrap ) - GEN_PREFIX( "wrap" ); - - outn( "" ); - } - - if ( did_outfilename ) - line_directive_out( stdout, 0 ); - - skelout(); - } - - -/* flexend - terminate flex - * - * note - * This routine does not return. - */ - -void flexend( exit_status ) -int exit_status; - - { - int tblsiz; - int unlink(); - - if ( skelfile != NULL ) - { - if ( ferror( skelfile ) ) - lerrsf( _( "input error reading skeleton file %s" ), - skelname ); - - else if ( fclose( skelfile ) ) - lerrsf( _( "error closing skeleton file %s" ), - skelname ); - } - - if ( exit_status != 0 && outfile_created ) - { - if ( ferror( stdout ) ) - lerrsf( _( "error writing output file %s" ), - outfilename ); - - else if ( fclose( stdout ) ) - lerrsf( _( "error closing output file %s" ), - outfilename ); - - else if ( unlink( outfilename ) ) - lerrsf( _( "error deleting output file %s" ), - outfilename ); - } - - if ( backing_up_report && backing_up_file ) - { - if ( num_backing_up == 0 ) - fprintf( backing_up_file, _( "No backing up.\n" ) ); - else if ( fullspd || fulltbl ) - fprintf( backing_up_file, - _( "%d backing up (non-accepting) states.\n" ), - num_backing_up ); - else - fprintf( backing_up_file, - _( "Compressed tables always back up.\n" ) ); - - if ( ferror( backing_up_file ) ) - lerrsf( _( "error writing backup file %s" ), - backing_name ); - - else if ( fclose( backing_up_file ) ) - lerrsf( _( "error closing backup file %s" ), - backing_name ); - } - - if ( printstats ) - { - fprintf( stderr, _( "%s version %s usage statistics:\n" ), - program_name, flex_version ); - - fprintf( stderr, _( " scanner options: -" ) ); - - if ( C_plus_plus ) - putc( '+', stderr ); - if ( backing_up_report ) - putc( 'b', stderr ); - if ( ddebug ) - putc( 'd', stderr ); - if ( caseins ) - putc( 'i', stderr ); - if ( lex_compat ) - putc( 'l', stderr ); - if ( performance_report > 0 ) - putc( 'p', stderr ); - if ( performance_report > 1 ) - putc( 'p', stderr ); - if ( spprdflt ) - putc( 's', stderr ); - if ( use_stdout ) - putc( 't', stderr ); - if ( printstats ) - putc( 'v', stderr ); /* always true! */ - if ( nowarn ) - putc( 'w', stderr ); - if ( interactive == false ) - putc( 'B', stderr ); - if ( interactive == true ) - putc( 'I', stderr ); - if ( ! gen_line_dirs ) - putc( 'L', stderr ); - if ( trace ) - putc( 'T', stderr ); - - if ( csize == unspecified ) - /* We encountered an error fairly early on, so csize - * never got specified. Define it now, to prevent - * bogus table sizes being written out below. - */ - csize = 256; - - if ( csize == 128 ) - putc( '7', stderr ); - else - putc( '8', stderr ); - - fprintf( stderr, " -C" ); - - if ( long_align ) - putc( 'a', stderr ); - if ( fulltbl ) - putc( 'f', stderr ); - if ( fullspd ) - putc( 'F', stderr ); - if ( useecs ) - putc( 'e', stderr ); - if ( usemecs ) - putc( 'm', stderr ); - if ( use_read ) - putc( 'r', stderr ); - - if ( did_outfilename ) - fprintf( stderr, " -o%s", outfilename ); - - if ( skelname ) - fprintf( stderr, " -S%s", skelname ); - - if ( strcmp( prefix, "yy" ) ) - fprintf( stderr, " -P%s", prefix ); - - putc( '\n', stderr ); - - fprintf( stderr, _( " %d/%d NFA states\n" ), - lastnfa, current_mns ); - fprintf( stderr, _( " %d/%d DFA states (%d words)\n" ), - lastdfa, current_max_dfas, totnst ); - fprintf( stderr, _( " %d rules\n" ), - num_rules + num_eof_rules - 1 /* - 1 for def. rule */ ); - - if ( num_backing_up == 0 ) - fprintf( stderr, _( " No backing up\n" ) ); - else if ( fullspd || fulltbl ) - fprintf( stderr, - _( " %d backing-up (non-accepting) states\n" ), - num_backing_up ); - else - fprintf( stderr, - _( " Compressed tables always back-up\n" ) ); - - if ( bol_needed ) - fprintf( stderr, - _( " Beginning-of-line patterns used\n" ) ); - - fprintf( stderr, _( " %d/%d start conditions\n" ), lastsc, - current_max_scs ); - fprintf( stderr, - _( " %d epsilon states, %d double epsilon states\n" ), - numeps, eps2 ); - - if ( lastccl == 0 ) - fprintf( stderr, _( " no character classes\n" ) ); - else - fprintf( stderr, -_( " %d/%d character classes needed %d/%d words of storage, %d reused\n" ), - lastccl, current_maxccls, - cclmap[lastccl] + ccllen[lastccl], - current_max_ccl_tbl_size, cclreuse ); - - fprintf( stderr, _( " %d state/nextstate pairs created\n" ), - numsnpairs ); - fprintf( stderr, _( " %d/%d unique/duplicate transitions\n" ), - numuniq, numdup ); - - if ( fulltbl ) - { - tblsiz = lastdfa * numecs; - fprintf( stderr, _( " %d table entries\n" ), tblsiz ); - } - - else - { - tblsiz = 2 * (lastdfa + numtemps) + 2 * tblend; - - fprintf( stderr, - _( " %d/%d base-def entries created\n" ), - lastdfa + numtemps, current_max_dfas ); - fprintf( stderr, - _( " %d/%d (peak %d) nxt-chk entries created\n" ), - tblend, current_max_xpairs, peakpairs ); - fprintf( stderr, - _( " %d/%d (peak %d) template nxt-chk entries created\n" ), - numtemps * nummecs, - current_max_template_xpairs, - numtemps * numecs ); - fprintf( stderr, _( " %d empty table entries\n" ), - nummt ); - fprintf( stderr, _( " %d protos created\n" ), - numprots ); - fprintf( stderr, - _( " %d templates created, %d uses\n" ), - numtemps, tmpuses ); - } - - if ( useecs ) - { - tblsiz = tblsiz + csize; - fprintf( stderr, - _( " %d/%d equivalence classes created\n" ), - numecs, csize ); - } - - if ( usemecs ) - { - tblsiz = tblsiz + numecs; - fprintf( stderr, - _( " %d/%d meta-equivalence classes created\n" ), - nummecs, csize ); - } - - fprintf( stderr, - _( " %d (%d saved) hash collisions, %d DFAs equal\n" ), - hshcol, hshsave, dfaeql ); - fprintf( stderr, _( " %d sets of reallocations needed\n" ), - num_reallocs ); - fprintf( stderr, _( " %d total table entries needed\n" ), - tblsiz ); - } - - exit( exit_status ); - } - - -/* flexinit - initialize flex */ - -void flexinit( argc, argv ) -int argc; -char **argv; - { - int i, sawcmpflag; - char *arg; - - printstats = syntaxerror = trace = spprdflt = caseins = false; - lex_compat = C_plus_plus = backing_up_report = ddebug = fulltbl = false; - fullspd = long_align = nowarn = yymore_used = continued_action = false; - do_yylineno = yytext_is_array = in_rule = reject = do_stdinit = false; - yymore_really_used = reject_really_used = unspecified; - interactive = csize = unspecified; - do_yywrap = gen_line_dirs = usemecs = useecs = true; - performance_report = 0; - did_outfilename = 0; - prefix = "yy"; - yyclass = 0; - use_read = use_stdout = false; - - sawcmpflag = false; - - /* Initialize dynamic array for holding the rule actions. */ - action_size = 2048; /* default size of action array in bytes */ - action_array = allocate_character_array( action_size ); - defs1_offset = prolog_offset = action_offset = action_index = 0; - action_array[0] = '\0'; - - program_name = argv[0]; - - if ( program_name[0] != '\0' && - program_name[strlen( program_name ) - 1] == '+' ) - C_plus_plus = true; - - /* read flags */ - for ( --argc, ++argv; argc ; --argc, ++argv ) - { - arg = argv[0]; - - if ( arg[0] != '-' || arg[1] == '\0' ) - break; - - if ( arg[1] == '-' ) - { /* --option */ - if ( ! strcmp( arg, "--help" ) ) - arg = "-h"; - - else if ( ! strcmp( arg, "--version" ) ) - arg = "-V"; - - else if ( ! strcmp( arg, "--" ) ) - { /* end of options */ - --argc; - ++argv; - break; - } - } - - for ( i = 1; arg[i] != '\0'; ++i ) - switch ( arg[i] ) - { - case '+': - C_plus_plus = true; - break; - - case 'B': - interactive = false; - break; - - case 'b': - backing_up_report = true; - break; - - case 'c': - break; - - case 'C': - if ( i != 1 ) - flexerror( - _( "-C flag must be given separately" ) ); - - if ( ! sawcmpflag ) - { - useecs = false; - usemecs = false; - fulltbl = false; - sawcmpflag = true; - } - - for ( ++i; arg[i] != '\0'; ++i ) - switch ( arg[i] ) - { - case 'a': - long_align = - true; - break; - - case 'e': - useecs = true; - break; - - case 'F': - fullspd = true; - break; - - case 'f': - fulltbl = true; - break; - - case 'm': - usemecs = true; - break; - - case 'r': - use_read = true; - break; - - default: - lerrif( - _( "unknown -C option '%c'" ), - (int) arg[i] ); - break; - } - - goto get_next_arg; - - case 'd': - ddebug = true; - break; - - case 'f': - useecs = usemecs = false; - use_read = fulltbl = true; - break; - - case 'F': - useecs = usemecs = false; - use_read = fullspd = true; - break; - - case '?': - case 'h': - usage(); - exit( 0 ); - - case 'I': - interactive = true; - break; - - case 'i': - caseins = true; - break; - - case 'l': - lex_compat = true; - break; - - case 'L': - gen_line_dirs = false; - break; - - case 'n': - /* Stupid do-nothing deprecated - * option. - */ - break; - - case 'o': - if ( i != 1 ) - flexerror( - _( "-o flag must be given separately" ) ); - - outfilename = arg + i + 1; - did_outfilename = 1; - goto get_next_arg; - - case 'P': - if ( i != 1 ) - flexerror( - _( "-P flag must be given separately" ) ); - - prefix = arg + i + 1; - goto get_next_arg; - - case 'p': - ++performance_report; - break; - - case 'S': - if ( i != 1 ) - flexerror( - _( "-S flag must be given separately" ) ); - - skelname = arg + i + 1; - goto get_next_arg; - - case 's': - spprdflt = true; - break; - - case 't': - use_stdout = true; - break; - - case 'T': - trace = true; - break; - - case 'v': - printstats = true; - break; - - case 'V': - printf( _( "%s version %s\n" ), - program_name, flex_version ); - exit( 0 ); - - case 'w': - nowarn = true; - break; - - case '7': - csize = 128; - break; - - case '8': - csize = CSIZE; - break; - - default: - fprintf( stderr, - _( "%s: unknown flag '%c'. For usage, try\n\t%s --help\n" ), - program_name, (int) arg[i], - program_name ); - exit( 1 ); - } - - /* Used by -C, -S, -o, and -P flags in lieu of a "continue 2" - * control. - */ - get_next_arg: ; - } - - num_input_files = argc; - input_files = argv; - set_input_file( num_input_files > 0 ? input_files[0] : NULL ); - - lastccl = lastsc = lastdfa = lastnfa = 0; - num_rules = num_eof_rules = default_rule = 0; - numas = numsnpairs = tmpuses = 0; - numecs = numeps = eps2 = num_reallocs = hshcol = dfaeql = totnst = 0; - numuniq = numdup = hshsave = eofseen = datapos = dataline = 0; - num_backing_up = onesp = numprots = 0; - variable_trailing_context_rules = bol_needed = false; - - out_linenum = linenum = sectnum = 1; - firstprot = NIL; - - /* Used in mkprot() so that the first proto goes in slot 1 - * of the proto queue. - */ - lastprot = 1; - - set_up_initial_allocations(); - } - - -/* readin - read in the rules section of the input file(s) */ - -void readin() - { - static char yy_stdinit[] = "FILE *yyin = stdin, *yyout = stdout;"; - static char yy_nostdinit[] = - "FILE *yyin = (FILE *) 0, *yyout = (FILE *) 0;"; - - line_directive_out( (FILE *) 0, 1 ); - - if ( yyparse() ) - { - pinpoint_message( _( "fatal parse error" ) ); - flexend( 1 ); - } - - if ( syntaxerror ) - flexend( 1 ); - - if ( backing_up_report ) - { - backing_up_file = fopen( backing_name, "w" ); - if ( backing_up_file == NULL ) - lerrsf( - _( "could not create backing-up info file %s" ), - backing_name ); - } - - else - backing_up_file = NULL; - - if ( yymore_really_used == true ) - yymore_used = true; - else if ( yymore_really_used == false ) - yymore_used = false; - - if ( reject_really_used == true ) - reject = true; - else if ( reject_really_used == false ) - reject = false; - - if ( performance_report > 0 ) - { - if ( lex_compat ) - { - fprintf( stderr, -_( "-l AT&T lex compatibility option entails a large performance penalty\n" ) ); - fprintf( stderr, -_( " and may be the actual source of other reported performance penalties\n" ) ); - } - - else if ( do_yylineno ) - { - fprintf( stderr, - _( "%%option yylineno entails a large performance penalty\n" ) ); - } - - if ( performance_report > 1 ) - { - if ( interactive ) - fprintf( stderr, - _( "-I (interactive) entails a minor performance penalty\n" ) ); - - if ( yymore_used ) - fprintf( stderr, - _( "yymore() entails a minor performance penalty\n" ) ); - } - - if ( reject ) - fprintf( stderr, - _( "REJECT entails a large performance penalty\n" ) ); - - if ( variable_trailing_context_rules ) - fprintf( stderr, -_( "Variable trailing context rules entail a large performance penalty\n" ) ); - } - - if ( reject ) - real_reject = true; - - if ( variable_trailing_context_rules ) - reject = true; - - if ( (fulltbl || fullspd) && reject ) - { - if ( real_reject ) - flexerror( - _( "REJECT cannot be used with -f or -F" ) ); - else if ( do_yylineno ) - flexerror( - _( "%option yylineno cannot be used with -f or -F" ) ); - else - flexerror( - _( "variable trailing context rules cannot be used with -f or -F" ) ); - } - - if ( reject ) - outn( "\n#define YY_USES_REJECT" ); - - if ( ! do_yywrap ) - { - outn( "\n#define yywrap() 1" ); - outn( "#define YY_SKIP_YYWRAP" ); - } - - if ( ddebug ) - outn( "\n#define FLEX_DEBUG" ); - - if ( csize == 256 ) - outn( "typedef unsigned char YY_CHAR;" ); - else - outn( "typedef char YY_CHAR;" ); - - if ( C_plus_plus ) - { - outn( "#define yytext_ptr yytext" ); - - if ( interactive ) - outn( "#define YY_INTERACTIVE" ); - } - - else - { - if ( do_stdinit ) - { - outn( "#ifdef VMS" ); - outn( "#ifndef __VMS_POSIX" ); - outn( yy_nostdinit ); - outn( "#else" ); - outn( yy_stdinit ); - outn( "#endif" ); - outn( "#else" ); - outn( yy_stdinit ); - outn( "#endif" ); - } - - else - outn( yy_nostdinit ); - } - - if ( fullspd ) - outn( "typedef yyconst struct yy_trans_info *yy_state_type;" ); - else if ( ! C_plus_plus ) - outn( "typedef int yy_state_type;" ); - - if ( ddebug ) - outn( "\n#define FLEX_DEBUG" ); - - if ( lex_compat ) - outn( "#define YY_FLEX_LEX_COMPAT" ); - - if ( do_yylineno && ! C_plus_plus ) - { - outn( "extern int yylineno;" ); - outn( "int yylineno = 1;" ); - } - - if ( C_plus_plus ) - { - outn( "\n#include " ); - - if ( yyclass ) - { - outn( "int yyFlexLexer::yylex()" ); - outn( "\t{" ); - outn( -"\tLexerError( \"yyFlexLexer::yylex invoked but %option yyclass used\" );" ); - outn( "\treturn 0;" ); - outn( "\t}" ); - - out_str( "\n#define YY_DECL int %s::yylex()\n", - yyclass ); - } - } - - else - { - if ( yytext_is_array ) - outn( "extern char yytext[];\n" ); - - else - { - outn( "extern char *yytext;" ); - outn( "#define yytext_ptr yytext" ); - } - - if ( yyclass ) - flexerror( - _( "%option yyclass only meaningful for C++ scanners" ) ); - } - - if ( useecs ) - numecs = cre8ecs( nextecm, ecgroup, csize ); - else - numecs = csize; - - /* Now map the equivalence class for NUL to its expected place. */ - ecgroup[0] = ecgroup[csize]; - NUL_ec = ABS( ecgroup[0] ); - - if ( useecs ) - ccl2ecl(); - } - - -/* set_up_initial_allocations - allocate memory for internal tables */ - -void set_up_initial_allocations() - { - current_mns = INITIAL_MNS; - firstst = allocate_integer_array( current_mns ); - lastst = allocate_integer_array( current_mns ); - finalst = allocate_integer_array( current_mns ); - transchar = allocate_integer_array( current_mns ); - trans1 = allocate_integer_array( current_mns ); - trans2 = allocate_integer_array( current_mns ); - accptnum = allocate_integer_array( current_mns ); - assoc_rule = allocate_integer_array( current_mns ); - state_type = allocate_integer_array( current_mns ); - - current_max_rules = INITIAL_MAX_RULES; - rule_type = allocate_integer_array( current_max_rules ); - rule_linenum = allocate_integer_array( current_max_rules ); - rule_useful = allocate_integer_array( current_max_rules ); - - current_max_scs = INITIAL_MAX_SCS; - scset = allocate_integer_array( current_max_scs ); - scbol = allocate_integer_array( current_max_scs ); - scxclu = allocate_integer_array( current_max_scs ); - sceof = allocate_integer_array( current_max_scs ); - scname = allocate_char_ptr_array( current_max_scs ); - - current_maxccls = INITIAL_MAX_CCLS; - cclmap = allocate_integer_array( current_maxccls ); - ccllen = allocate_integer_array( current_maxccls ); - cclng = allocate_integer_array( current_maxccls ); - - current_max_ccl_tbl_size = INITIAL_MAX_CCL_TBL_SIZE; - ccltbl = allocate_Character_array( current_max_ccl_tbl_size ); - - current_max_dfa_size = INITIAL_MAX_DFA_SIZE; - - current_max_xpairs = INITIAL_MAX_XPAIRS; - nxt = allocate_integer_array( current_max_xpairs ); - chk = allocate_integer_array( current_max_xpairs ); - - current_max_template_xpairs = INITIAL_MAX_TEMPLATE_XPAIRS; - tnxt = allocate_integer_array( current_max_template_xpairs ); - - current_max_dfas = INITIAL_MAX_DFAS; - base = allocate_integer_array( current_max_dfas ); - def = allocate_integer_array( current_max_dfas ); - dfasiz = allocate_integer_array( current_max_dfas ); - accsiz = allocate_integer_array( current_max_dfas ); - dhash = allocate_integer_array( current_max_dfas ); - dss = allocate_int_ptr_array( current_max_dfas ); - dfaacc = allocate_dfaacc_union( current_max_dfas ); - - nultrans = (int *) 0; - } - - -void usage() - { - FILE *f = stdout; - - fprintf( f, -_( "%s [-bcdfhilnpstvwBFILTV78+? -C[aefFmr] -ooutput -Pprefix -Sskeleton]\n" ), - program_name ); - fprintf( f, _( "\t[--help --version] [file ...]\n" ) ); - - fprintf( f, _( "\t-b generate backing-up information to %s\n" ), - backing_name ); - fprintf( f, _( "\t-c do-nothing POSIX option\n" ) ); - fprintf( f, _( "\t-d turn on debug mode in generated scanner\n" ) ); - fprintf( f, _( "\t-f generate fast, large scanner\n" ) ); - fprintf( f, _( "\t-h produce this help message\n" ) ); - fprintf( f, _( "\t-i generate case-insensitive scanner\n" ) ); - fprintf( f, _( "\t-l maximal compatibility with original lex\n" ) ); - fprintf( f, _( "\t-n do-nothing POSIX option\n" ) ); - fprintf( f, _( "\t-p generate performance report to stderr\n" ) ); - fprintf( f, - _( "\t-s suppress default rule to ECHO unmatched text\n" ) ); - - if ( ! did_outfilename ) - { - sprintf( outfile_path, outfile_template, - prefix, C_plus_plus ? "cc" : "c" ); - outfilename = outfile_path; - } - - fprintf( f, - _( "\t-t write generated scanner on stdout instead of %s\n" ), - outfilename ); - - fprintf( f, - _( "\t-v write summary of scanner statistics to f\n" ) ); - fprintf( f, _( "\t-w do not generate warnings\n" ) ); - fprintf( f, _( "\t-B generate batch scanner (opposite of -I)\n" ) ); - fprintf( f, - _( "\t-F use alternative fast scanner representation\n" ) ); - fprintf( f, - _( "\t-I generate interactive scanner (opposite of -B)\n" ) ); - fprintf( f, _( "\t-L suppress #line directives in scanner\n" ) ); - fprintf( f, _( "\t-T %s should run in trace mode\n" ), program_name ); - fprintf( f, _( "\t-V report %s version\n" ), program_name ); - fprintf( f, _( "\t-7 generate 7-bit scanner\n" ) ); - fprintf( f, _( "\t-8 generate 8-bit scanner\n" ) ); - fprintf( f, _( "\t-+ generate C++ scanner class\n" ) ); - fprintf( f, _( "\t-? produce this help message\n" ) ); - fprintf( f, -_( "\t-C specify degree of table compression (default is -Cem):\n" ) ); - fprintf( f, -_( "\t\t-Ca trade off larger tables for better memory alignment\n" ) ); - fprintf( f, _( "\t\t-Ce construct equivalence classes\n" ) ); - fprintf( f, -_( "\t\t-Cf do not compress scanner tables; use -f representation\n" ) ); - fprintf( f, -_( "\t\t-CF do not compress scanner tables; use -F representation\n" ) ); - fprintf( f, _( "\t\t-Cm construct meta-equivalence classes\n" ) ); - fprintf( f, - _( "\t\t-Cr use read() instead of stdio for scanner input\n" ) ); - fprintf( f, _( "\t-o specify output filename\n" ) ); - fprintf( f, _( "\t-P specify scanner prefix other than \"yy\"\n" ) ); - fprintf( f, _( "\t-S specify skeleton file\n" ) ); - fprintf( f, _( "\t--help produce this help message\n" ) ); - fprintf( f, _( "\t--version report %s version\n" ), program_name ); - } diff --git a/commands/flex-2.5.4/misc.c b/commands/flex-2.5.4/misc.c deleted file mode 100644 index 7093661e6..000000000 --- a/commands/flex-2.5.4/misc.c +++ /dev/null @@ -1,886 +0,0 @@ -/* misc - miscellaneous flex routines */ - -/*- - * Copyright (c) 1990 The Regents of the University of California. - * All rights reserved. - * - * This code is derived from software contributed to Berkeley by - * Vern Paxson. - * - * The United States Government has rights in this work pursuant - * to contract no. DE-AC03-76SF00098 between the United States - * Department of Energy and the University of California. - * - * Redistribution and use in source and binary forms with or without - * modification are permitted provided that: (1) source distributions retain - * this entire copyright notice and comment, and (2) distributions including - * binaries display the following acknowledgement: ``This product includes - * software developed by the University of California, Berkeley and its - * contributors'' in the documentation or other materials provided with the - * distribution and in all advertising materials mentioning features or use - * of this software. Neither the name of the University nor the names of - * its contributors may be used to endorse or promote products derived from - * this software without specific prior written permission. - * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED - * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF - * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. - */ - -/* $Header$ */ - -#include "flexdef.h" - - -void action_define( defname, value ) -char *defname; -int value; - { - char buf[MAXLINE]; - - if ( (int) strlen( defname ) > MAXLINE / 2 ) - { - format_pinpoint_message( _( "name \"%s\" ridiculously long" ), - defname ); - return; - } - - sprintf( buf, "#define %s %d\n", defname, value ); - add_action( buf ); - } - - -void add_action( new_text ) -char *new_text; - { - int len = strlen( new_text ); - - while ( len + action_index >= action_size - 10 /* slop */ ) - { - int new_size = action_size * 2; - - if ( new_size <= 0 ) - /* Increase just a little, to try to avoid overflow - * on 16-bit machines. - */ - action_size += action_size / 8; - else - action_size = new_size; - - action_array = - reallocate_character_array( action_array, action_size ); - } - - strcpy( &action_array[action_index], new_text ); - - action_index += len; - } - - -/* allocate_array - allocate memory for an integer array of the given size */ - -void *allocate_array( size, element_size ) -int size; -size_t element_size; - { - register void *mem; - size_t num_bytes = element_size * size; - - mem = flex_alloc( num_bytes ); - if ( ! mem ) - flexfatal( - _( "memory allocation failed in allocate_array()" ) ); - - return mem; - } - - -/* all_lower - true if a string is all lower-case */ - -int all_lower( str ) -register char *str; - { - while ( *str ) - { - if ( ! isascii( (Char) *str ) || ! islower( *str ) ) - return 0; - ++str; - } - - return 1; - } - - -/* all_upper - true if a string is all upper-case */ - -int all_upper( str ) -register char *str; - { - while ( *str ) - { - if ( ! isascii( (Char) *str ) || ! isupper( *str ) ) - return 0; - ++str; - } - - return 1; - } - - -/* bubble - bubble sort an integer array in increasing order - * - * synopsis - * int v[n], n; - * void bubble( v, n ); - * - * description - * sorts the first n elements of array v and replaces them in - * increasing order. - * - * passed - * v - the array to be sorted - * n - the number of elements of 'v' to be sorted - */ - -void bubble( v, n ) -int v[], n; - { - register int i, j, k; - - for ( i = n; i > 1; --i ) - for ( j = 1; j < i; ++j ) - if ( v[j] > v[j + 1] ) /* compare */ - { - k = v[j]; /* exchange */ - v[j] = v[j + 1]; - v[j + 1] = k; - } - } - - -/* check_char - checks a character to make sure it's within the range - * we're expecting. If not, generates fatal error message - * and exits. - */ - -void check_char( c ) -int c; - { - if ( c >= CSIZE ) - lerrsf( _( "bad character '%s' detected in check_char()" ), - readable_form( c ) ); - - if ( c >= csize ) - lerrsf( - _( "scanner requires -8 flag to use the character %s" ), - readable_form( c ) ); - } - - - -/* clower - replace upper-case letter to lower-case */ - -Char clower( c ) -register int c; - { - return (Char) ((isascii( c ) && isupper( c )) ? tolower( c ) : c); - } - - -/* copy_string - returns a dynamically allocated copy of a string */ - -char *copy_string( str ) -register const char *str; - { - register const char *c1; - register char *c2; - char *copy; - unsigned int size; - - /* find length */ - for ( c1 = str; *c1; ++c1 ) - ; - - size = (c1 - str + 1) * sizeof( char ); - copy = (char *) flex_alloc( size ); - - if ( copy == NULL ) - flexfatal( _( "dynamic memory failure in copy_string()" ) ); - - for ( c2 = copy; (*c2++ = *str++) != 0; ) - ; - - return copy; - } - - -/* copy_unsigned_string - - * returns a dynamically allocated copy of a (potentially) unsigned string - */ - -Char *copy_unsigned_string( str ) -register Char *str; - { - register Char *c; - Char *copy; - - /* find length */ - for ( c = str; *c; ++c ) - ; - - copy = allocate_Character_array( c - str + 1 ); - - for ( c = copy; (*c++ = *str++) != 0; ) - ; - - return copy; - } - - -/* cshell - shell sort a character array in increasing order - * - * synopsis - * - * Char v[n]; - * int n, special_case_0; - * cshell( v, n, special_case_0 ); - * - * description - * Does a shell sort of the first n elements of array v. - * If special_case_0 is true, then any element equal to 0 - * is instead assumed to have infinite weight. - * - * passed - * v - array to be sorted - * n - number of elements of v to be sorted - */ - -void cshell( v, n, special_case_0 ) -Char v[]; -int n, special_case_0; - { - int gap, i, j, jg; - Char k; - - for ( gap = n / 2; gap > 0; gap = gap / 2 ) - for ( i = gap; i < n; ++i ) - for ( j = i - gap; j >= 0; j = j - gap ) - { - jg = j + gap; - - if ( special_case_0 ) - { - if ( v[jg] == 0 ) - break; - - else if ( v[j] != 0 && v[j] <= v[jg] ) - break; - } - - else if ( v[j] <= v[jg] ) - break; - - k = v[j]; - v[j] = v[jg]; - v[jg] = k; - } - } - - -/* dataend - finish up a block of data declarations */ - -void dataend() - { - if ( datapos > 0 ) - dataflush(); - - /* add terminator for initialization; { for vi */ - outn( " } ;\n" ); - - dataline = 0; - datapos = 0; - } - - -/* dataflush - flush generated data statements */ - -void dataflush() - { - outc( '\n' ); - - if ( ++dataline >= NUMDATALINES ) - { - /* Put out a blank line so that the table is grouped into - * large blocks that enable the user to find elements easily. - */ - outc( '\n' ); - dataline = 0; - } - - /* Reset the number of characters written on the current line. */ - datapos = 0; - } - - -/* flexerror - report an error message and terminate */ - -void flexerror( msg ) -const char msg[]; - { - fprintf( stderr, "%s: %s\n", program_name, msg ); - flexend( 1 ); - } - - -/* flexfatal - report a fatal error message and terminate */ - -void flexfatal( msg ) -const char msg[]; - { - fprintf( stderr, _( "%s: fatal internal error, %s\n" ), - program_name, msg ); - exit( 1 ); - } - - -/* htoi - convert a hexadecimal digit string to an integer value */ - -int htoi( str ) -Char str[]; - { - unsigned int result; - - (void) sscanf( (char *) str, "%x", &result ); - - return result; - } - - -/* lerrif - report an error message formatted with one integer argument */ - -void lerrif( msg, arg ) -const char msg[]; -int arg; - { - char errmsg[MAXLINE]; - (void) sprintf( errmsg, msg, arg ); - flexerror( errmsg ); - } - - -/* lerrsf - report an error message formatted with one string argument */ - -void lerrsf( msg, arg ) -const char msg[], arg[]; - { - char errmsg[MAXLINE]; - - (void) sprintf( errmsg, msg, arg ); - flexerror( errmsg ); - } - - -/* line_directive_out - spit out a "#line" statement */ - -void line_directive_out( output_file, do_infile ) -FILE *output_file; -int do_infile; - { - char directive[MAXLINE], filename[MAXLINE]; - char *s1, *s2, *s3; - static char line_fmt[] = "#line %d \"%s\"\n"; - - if ( ! gen_line_dirs ) - return; - - if ( (do_infile && ! infilename) || (! do_infile && ! outfilename) ) - /* don't know the filename to use, skip */ - return; - - s1 = do_infile ? infilename : outfilename; - s2 = filename; - s3 = &filename[sizeof( filename ) - 2]; - - while ( s2 < s3 && *s1 ) - { - if ( *s1 == '\\' ) - /* Escape the '\' */ - *s2++ = '\\'; - - *s2++ = *s1++; - } - - *s2 = '\0'; - - if ( do_infile ) - sprintf( directive, line_fmt, linenum, filename ); - else - { - if ( output_file == stdout ) - /* Account for the line directive itself. */ - ++out_linenum; - - sprintf( directive, line_fmt, out_linenum, filename ); - } - - /* If output_file is nil then we should put the directive in - * the accumulated actions. - */ - if ( output_file ) - { - fputs( directive, output_file ); - } - else - add_action( directive ); - } - - -/* mark_defs1 - mark the current position in the action array as - * representing where the user's section 1 definitions end - * and the prolog begins - */ -void mark_defs1() - { - defs1_offset = 0; - action_array[action_index++] = '\0'; - action_offset = prolog_offset = action_index; - action_array[action_index] = '\0'; - } - - -/* mark_prolog - mark the current position in the action array as - * representing the end of the action prolog - */ -void mark_prolog() - { - action_array[action_index++] = '\0'; - action_offset = action_index; - action_array[action_index] = '\0'; - } - - -/* mk2data - generate a data statement for a two-dimensional array - * - * Generates a data statement initializing the current 2-D array to "value". - */ -void mk2data( value ) -int value; - { - if ( datapos >= NUMDATAITEMS ) - { - outc( ',' ); - dataflush(); - } - - if ( datapos == 0 ) - /* Indent. */ - out( " " ); - - else - outc( ',' ); - - ++datapos; - - out_dec( "%5d", value ); - } - - -/* mkdata - generate a data statement - * - * Generates a data statement initializing the current array element to - * "value". - */ -void mkdata( value ) -int value; - { - if ( datapos >= NUMDATAITEMS ) - { - outc( ',' ); - dataflush(); - } - - if ( datapos == 0 ) - /* Indent. */ - out( " " ); - else - outc( ',' ); - - ++datapos; - - out_dec( "%5d", value ); - } - - -/* myctoi - return the integer represented by a string of digits */ - -int myctoi( array ) -char array[]; - { - int val = 0; - - (void) sscanf( array, "%d", &val ); - - return val; - } - - -/* myesc - return character corresponding to escape sequence */ - -Char myesc( array ) -Char array[]; - { - Char c, esc_char; - - switch ( array[1] ) - { - case 'b': return '\b'; - case 'f': return '\f'; - case 'n': return '\n'; - case 'r': return '\r'; - case 't': return '\t'; - -#if __STDC__ - case 'a': return '\a'; - case 'v': return '\v'; -#else - case 'a': return '\007'; - case 'v': return '\013'; -#endif - - case '0': - case '1': - case '2': - case '3': - case '4': - case '5': - case '6': - case '7': - { /* \ */ - int sptr = 1; - - while ( isascii( array[sptr] ) && - isdigit( array[sptr] ) ) - /* Don't increment inside loop control - * because if isdigit() is a macro it might - * expand into multiple increments ... - */ - ++sptr; - - c = array[sptr]; - array[sptr] = '\0'; - - esc_char = otoi( array + 1 ); - - array[sptr] = c; - - return esc_char; - } - - case 'x': - { /* \x */ - int sptr = 2; - - while ( isascii( array[sptr] ) && - isxdigit( (char) array[sptr] ) ) - /* Don't increment inside loop control - * because if isdigit() is a macro it might - * expand into multiple increments ... - */ - ++sptr; - - c = array[sptr]; - array[sptr] = '\0'; - - esc_char = htoi( array + 2 ); - - array[sptr] = c; - - return esc_char; - } - - default: - return array[1]; - } - } - - -/* otoi - convert an octal digit string to an integer value */ - -int otoi( str ) -Char str[]; - { - unsigned int result; - - (void) sscanf( (char *) str, "%o", &result ); - return result; - } - - -/* out - various flavors of outputing a (possibly formatted) string for the - * generated scanner, keeping track of the line count. - */ - -void out( str ) -const char str[]; - { - fputs( str, stdout ); - out_line_count( str ); - } - -void out_dec( fmt, n ) -const char fmt[]; -int n; - { - printf( fmt, n ); - out_line_count( fmt ); - } - -void out_dec2( fmt, n1, n2 ) -const char fmt[]; -int n1, n2; - { - printf( fmt, n1, n2 ); - out_line_count( fmt ); - } - -void out_hex( fmt, x ) -const char fmt[]; -unsigned int x; - { - printf( fmt, x ); - out_line_count( fmt ); - } - -void out_line_count( str ) -const char str[]; - { - register int i; - - for ( i = 0; str[i]; ++i ) - if ( str[i] == '\n' ) - ++out_linenum; - } - -void out_str( fmt, str ) -const char fmt[], str[]; - { - printf( fmt, str ); - out_line_count( fmt ); - out_line_count( str ); - } - -void out_str3( fmt, s1, s2, s3 ) -const char fmt[], s1[], s2[], s3[]; - { - printf( fmt, s1, s2, s3 ); - out_line_count( fmt ); - out_line_count( s1 ); - out_line_count( s2 ); - out_line_count( s3 ); - } - -void out_str_dec( fmt, str, n ) -const char fmt[], str[]; -int n; - { - printf( fmt, str, n ); - out_line_count( fmt ); - out_line_count( str ); - } - -void outc( c ) -int c; - { - putc( c, stdout ); - - if ( c == '\n' ) - ++out_linenum; - } - -void outn( str ) -const char str[]; - { - puts( str ); - out_line_count( str ); - ++out_linenum; - } - - -/* readable_form - return the the human-readable form of a character - * - * The returned string is in static storage. - */ - -char *readable_form( c ) -register int c; - { - static char rform[10]; - - if ( (c >= 0 && c < 32) || c >= 127 ) - { - switch ( c ) - { - case '\b': return "\\b"; - case '\f': return "\\f"; - case '\n': return "\\n"; - case '\r': return "\\r"; - case '\t': return "\\t"; - -#if __STDC__ - case '\a': return "\\a"; - case '\v': return "\\v"; -#endif - - default: - (void) sprintf( rform, "\\%.3o", - (unsigned int) c ); - return rform; - } - } - - else if ( c == ' ' ) - return "' '"; - - else - { - rform[0] = c; - rform[1] = '\0'; - - return rform; - } - } - - -/* reallocate_array - increase the size of a dynamic array */ - -void *reallocate_array( array, size, element_size ) -void *array; -int size; -size_t element_size; - { - register void *new_array; - size_t num_bytes = element_size * size; - - new_array = flex_realloc( array, num_bytes ); - if ( ! new_array ) - flexfatal( _( "attempt to increase array size failed" ) ); - - return new_array; - } - - -/* skelout - write out one section of the skeleton file - * - * Description - * Copies skelfile or skel array to stdout until a line beginning with - * "%%" or EOF is found. - */ -void skelout() - { - char buf_storage[MAXLINE]; - char *buf = buf_storage; - int do_copy = 1; - - /* Loop pulling lines either from the skelfile, if we're using - * one, or from the skel[] array. - */ - while ( skelfile ? - (fgets( buf, MAXLINE, skelfile ) != NULL) : - ((buf = (char *) skel[skel_ind++]) != 0) ) - { /* copy from skel array */ - if ( buf[0] == '%' ) - { /* control line */ - switch ( buf[1] ) - { - case '%': - return; - - case '+': - do_copy = C_plus_plus; - break; - - case '-': - do_copy = ! C_plus_plus; - break; - - case '*': - do_copy = 1; - break; - - default: - flexfatal( - _( "bad line in skeleton file" ) ); - } - } - - else if ( do_copy ) - { - if ( skelfile ) - /* Skeleton file reads include final - * newline, skel[] array does not. - */ - out( buf ); - else - outn( buf ); - } - } - } - - -/* transition_struct_out - output a yy_trans_info structure - * - * outputs the yy_trans_info structure with the two elements, element_v and - * element_n. Formats the output with spaces and carriage returns. - */ - -void transition_struct_out( element_v, element_n ) -int element_v, element_n; - { - out_dec2( " {%4d,%4d },", element_v, element_n ); - - datapos += TRANS_STRUCT_PRINT_LENGTH; - - if ( datapos >= 79 - TRANS_STRUCT_PRINT_LENGTH ) - { - outc( '\n' ); - - if ( ++dataline % 10 == 0 ) - outc( '\n' ); - - datapos = 0; - } - } - - -/* The following is only needed when building flex's parser using certain - * broken versions of bison. - */ -void *yy_flex_xmalloc( size ) -int size; - { - void *result = flex_alloc( (size_t) size ); - - if ( ! result ) - flexfatal( - _( "memory allocation failed in yy_flex_xmalloc()" ) ); - - return result; - } - - -/* zero_out - set a region of memory to 0 - * - * Sets region_ptr[0] through region_ptr[size_in_bytes - 1] to zero. - */ - -void zero_out( region_ptr, size_in_bytes ) -char *region_ptr; -size_t size_in_bytes; - { - register char *rp, *rp_end; - - rp = region_ptr; - rp_end = region_ptr + size_in_bytes; - - while ( rp < rp_end ) - *rp++ = 0; - } diff --git a/commands/flex-2.5.4/mkinstalldirs b/commands/flex-2.5.4/mkinstalldirs deleted file mode 100755 index 0e2937731..000000000 --- a/commands/flex-2.5.4/mkinstalldirs +++ /dev/null @@ -1,35 +0,0 @@ -#!/bin/sh -# Make directory hierarchy. -# Written by Noah Friedman -# Public domain. - -defaultIFS=' -' -IFS="${IFS-${defaultIFS}}" - -errstatus=0 - -for file in ${1+"$@"} ; do - oIFS="${IFS}" - # Some sh's can't handle IFS=/ for some reason. - IFS='%' - set - `echo ${file} | sed -e 's@/@%@g' -e 's@^%@/@'` - IFS="${oIFS}" - - pathcomp='' - - for d in ${1+"$@"} ; do - pathcomp="${pathcomp}${d}" - - if test ! -d "${pathcomp}"; then - echo "mkdir $pathcomp" 1>&2 - mkdir "${pathcomp}" || errstatus=$? - fi - - pathcomp="${pathcomp}/" - done -done - -exit $errstatus - -# eof diff --git a/commands/flex-2.5.4/mkskel.sh b/commands/flex-2.5.4/mkskel.sh deleted file mode 100755 index a03a11aba..000000000 --- a/commands/flex-2.5.4/mkskel.sh +++ /dev/null @@ -1,16 +0,0 @@ -#! /bin/sh - -cat < 0 ) - fprintf( stderr, - _( "Variable trailing context rule at line %d\n" ), - rule_linenum[num_rules] ); - - variable_trailing_context_rules = true; - } - - else - { - rule_type[num_rules] = RULE_NORMAL; - - if ( headcnt > 0 || trailcnt > 0 ) - { - /* Do trailing context magic to not match the trailing - * characters. - */ - char *scanner_cp = "yy_c_buf_p = yy_cp"; - char *scanner_bp = "yy_bp"; - - add_action( - "*yy_cp = yy_hold_char; /* undo effects of setting up yytext */\n" ); - - if ( headcnt > 0 ) - { - sprintf( action_text, "%s = %s + %d;\n", - scanner_cp, scanner_bp, headcnt ); - add_action( action_text ); - } - - else - { - sprintf( action_text, "%s -= %d;\n", - scanner_cp, trailcnt ); - add_action( action_text ); - } - - add_action( - "YY_DO_BEFORE_ACTION; /* set up yytext again */\n" ); - } - } - - /* Okay, in the action code at this point yytext and yyleng have - * their proper final values for this rule, so here's the point - * to do any user action. But don't do it for continued actions, - * as that'll result in multiple YY_RULE_SETUP's. - */ - if ( ! continued_action ) - add_action( "YY_RULE_SETUP\n" ); - - line_directive_out( (FILE *) 0, 1 ); - } - - -/* link_machines - connect two machines together - * - * synopsis - * - * new = link_machines( first, last ); - * - * new - a machine constructed by connecting first to last - * first - the machine whose successor is to be last - * last - the machine whose predecessor is to be first - * - * note: this routine concatenates the machine first with the machine - * last to produce a machine new which will pattern-match first first - * and then last, and will fail if either of the sub-patterns fails. - * FIRST is set to new by the operation. last is unmolested. - */ - -int link_machines( first, last ) -int first, last; - { - if ( first == NIL ) - return last; - - else if ( last == NIL ) - return first; - - else - { - mkxtion( finalst[first], last ); - finalst[first] = finalst[last]; - lastst[first] = MAX( lastst[first], lastst[last] ); - firstst[first] = MIN( firstst[first], firstst[last] ); - - return first; - } - } - - -/* mark_beginning_as_normal - mark each "beginning" state in a machine - * as being a "normal" (i.e., not trailing context- - * associated) states - * - * The "beginning" states are the epsilon closure of the first state - */ - -void mark_beginning_as_normal( mach ) -register int mach; - { - switch ( state_type[mach] ) - { - case STATE_NORMAL: - /* Oh, we've already visited here. */ - return; - - case STATE_TRAILING_CONTEXT: - state_type[mach] = STATE_NORMAL; - - if ( transchar[mach] == SYM_EPSILON ) - { - if ( trans1[mach] != NO_TRANSITION ) - mark_beginning_as_normal( - trans1[mach] ); - - if ( trans2[mach] != NO_TRANSITION ) - mark_beginning_as_normal( - trans2[mach] ); - } - break; - - default: - flexerror( - _( "bad state type in mark_beginning_as_normal()" ) ); - break; - } - } - - -/* mkbranch - make a machine that branches to two machines - * - * synopsis - * - * branch = mkbranch( first, second ); - * - * branch - a machine which matches either first's pattern or second's - * first, second - machines whose patterns are to be or'ed (the | operator) - * - * Note that first and second are NEITHER destroyed by the operation. Also, - * the resulting machine CANNOT be used with any other "mk" operation except - * more mkbranch's. Compare with mkor() - */ - -int mkbranch( first, second ) -int first, second; - { - int eps; - - if ( first == NO_TRANSITION ) - return second; - - else if ( second == NO_TRANSITION ) - return first; - - eps = mkstate( SYM_EPSILON ); - - mkxtion( eps, first ); - mkxtion( eps, second ); - - return eps; - } - - -/* mkclos - convert a machine into a closure - * - * synopsis - * new = mkclos( state ); - * - * new - a new state which matches the closure of "state" - */ - -int mkclos( state ) -int state; - { - return mkopt( mkposcl( state ) ); - } - - -/* mkopt - make a machine optional - * - * synopsis - * - * new = mkopt( mach ); - * - * new - a machine which optionally matches whatever mach matched - * mach - the machine to make optional - * - * notes: - * 1. mach must be the last machine created - * 2. mach is destroyed by the call - */ - -int mkopt( mach ) -int mach; - { - int eps; - - if ( ! SUPER_FREE_EPSILON(finalst[mach]) ) - { - eps = mkstate( SYM_EPSILON ); - mach = link_machines( mach, eps ); - } - - /* Can't skimp on the following if FREE_EPSILON(mach) is true because - * some state interior to "mach" might point back to the beginning - * for a closure. - */ - eps = mkstate( SYM_EPSILON ); - mach = link_machines( eps, mach ); - - mkxtion( mach, finalst[mach] ); - - return mach; - } - - -/* mkor - make a machine that matches either one of two machines - * - * synopsis - * - * new = mkor( first, second ); - * - * new - a machine which matches either first's pattern or second's - * first, second - machines whose patterns are to be or'ed (the | operator) - * - * note that first and second are both destroyed by the operation - * the code is rather convoluted because an attempt is made to minimize - * the number of epsilon states needed - */ - -int mkor( first, second ) -int first, second; - { - int eps, orend; - - if ( first == NIL ) - return second; - - else if ( second == NIL ) - return first; - - else - { - /* See comment in mkopt() about why we can't use the first - * state of "first" or "second" if they satisfy "FREE_EPSILON". - */ - eps = mkstate( SYM_EPSILON ); - - first = link_machines( eps, first ); - - mkxtion( first, second ); - - if ( SUPER_FREE_EPSILON(finalst[first]) && - accptnum[finalst[first]] == NIL ) - { - orend = finalst[first]; - mkxtion( finalst[second], orend ); - } - - else if ( SUPER_FREE_EPSILON(finalst[second]) && - accptnum[finalst[second]] == NIL ) - { - orend = finalst[second]; - mkxtion( finalst[first], orend ); - } - - else - { - eps = mkstate( SYM_EPSILON ); - - first = link_machines( first, eps ); - orend = finalst[first]; - - mkxtion( finalst[second], orend ); - } - } - - finalst[first] = orend; - return first; - } - - -/* mkposcl - convert a machine into a positive closure - * - * synopsis - * new = mkposcl( state ); - * - * new - a machine matching the positive closure of "state" - */ - -int mkposcl( state ) -int state; - { - int eps; - - if ( SUPER_FREE_EPSILON(finalst[state]) ) - { - mkxtion( finalst[state], state ); - return state; - } - - else - { - eps = mkstate( SYM_EPSILON ); - mkxtion( eps, state ); - return link_machines( state, eps ); - } - } - - -/* mkrep - make a replicated machine - * - * synopsis - * new = mkrep( mach, lb, ub ); - * - * new - a machine that matches whatever "mach" matched from "lb" - * number of times to "ub" number of times - * - * note - * if "ub" is INFINITY then "new" matches "lb" or more occurrences of "mach" - */ - -int mkrep( mach, lb, ub ) -int mach, lb, ub; - { - int base_mach, tail, copy, i; - - base_mach = copysingl( mach, lb - 1 ); - - if ( ub == INFINITY ) - { - copy = dupmachine( mach ); - mach = link_machines( mach, - link_machines( base_mach, mkclos( copy ) ) ); - } - - else - { - tail = mkstate( SYM_EPSILON ); - - for ( i = lb; i < ub; ++i ) - { - copy = dupmachine( mach ); - tail = mkopt( link_machines( copy, tail ) ); - } - - mach = link_machines( mach, link_machines( base_mach, tail ) ); - } - - return mach; - } - - -/* mkstate - create a state with a transition on a given symbol - * - * synopsis - * - * state = mkstate( sym ); - * - * state - a new state matching sym - * sym - the symbol the new state is to have an out-transition on - * - * note that this routine makes new states in ascending order through the - * state array (and increments LASTNFA accordingly). The routine DUPMACHINE - * relies on machines being made in ascending order and that they are - * CONTIGUOUS. Change it and you will have to rewrite DUPMACHINE (kludge - * that it admittedly is) - */ - -int mkstate( sym ) -int sym; - { - if ( ++lastnfa >= current_mns ) - { - if ( (current_mns += MNS_INCREMENT) >= MAXIMUM_MNS ) - lerrif( - _( "input rules are too complicated (>= %d NFA states)" ), - current_mns ); - - ++num_reallocs; - - firstst = reallocate_integer_array( firstst, current_mns ); - lastst = reallocate_integer_array( lastst, current_mns ); - finalst = reallocate_integer_array( finalst, current_mns ); - transchar = reallocate_integer_array( transchar, current_mns ); - trans1 = reallocate_integer_array( trans1, current_mns ); - trans2 = reallocate_integer_array( trans2, current_mns ); - accptnum = reallocate_integer_array( accptnum, current_mns ); - assoc_rule = - reallocate_integer_array( assoc_rule, current_mns ); - state_type = - reallocate_integer_array( state_type, current_mns ); - } - - firstst[lastnfa] = lastnfa; - finalst[lastnfa] = lastnfa; - lastst[lastnfa] = lastnfa; - transchar[lastnfa] = sym; - trans1[lastnfa] = NO_TRANSITION; - trans2[lastnfa] = NO_TRANSITION; - accptnum[lastnfa] = NIL; - assoc_rule[lastnfa] = num_rules; - state_type[lastnfa] = current_state_type; - - /* Fix up equivalence classes base on this transition. Note that any - * character which has its own transition gets its own equivalence - * class. Thus only characters which are only in character classes - * have a chance at being in the same equivalence class. E.g. "a|b" - * puts 'a' and 'b' into two different equivalence classes. "[ab]" - * puts them in the same equivalence class (barring other differences - * elsewhere in the input). - */ - - if ( sym < 0 ) - { - /* We don't have to update the equivalence classes since - * that was already done when the ccl was created for the - * first time. - */ - } - - else if ( sym == SYM_EPSILON ) - ++numeps; - - else - { - check_char( sym ); - - if ( useecs ) - /* Map NUL's to csize. */ - mkechar( sym ? sym : csize, nextecm, ecgroup ); - } - - return lastnfa; - } - - -/* mkxtion - make a transition from one state to another - * - * synopsis - * - * mkxtion( statefrom, stateto ); - * - * statefrom - the state from which the transition is to be made - * stateto - the state to which the transition is to be made - */ - -void mkxtion( statefrom, stateto ) -int statefrom, stateto; - { - if ( trans1[statefrom] == NO_TRANSITION ) - trans1[statefrom] = stateto; - - else if ( (transchar[statefrom] != SYM_EPSILON) || - (trans2[statefrom] != NO_TRANSITION) ) - flexfatal( _( "found too many transitions in mkxtion()" ) ); - - else - { /* second out-transition for an epsilon state */ - ++eps2; - trans2[statefrom] = stateto; - } - } - -/* new_rule - initialize for a new rule */ - -void new_rule() - { - if ( ++num_rules >= current_max_rules ) - { - ++num_reallocs; - current_max_rules += MAX_RULES_INCREMENT; - rule_type = reallocate_integer_array( rule_type, - current_max_rules ); - rule_linenum = reallocate_integer_array( rule_linenum, - current_max_rules ); - rule_useful = reallocate_integer_array( rule_useful, - current_max_rules ); - } - - if ( num_rules > MAX_RULE ) - lerrif( _( "too many rules (> %d)!" ), MAX_RULE ); - - rule_linenum[num_rules] = linenum; - rule_useful[num_rules] = false; - } diff --git a/commands/flex-2.5.4/parse.y b/commands/flex-2.5.4/parse.y deleted file mode 100644 index f7efa6ce3..000000000 --- a/commands/flex-2.5.4/parse.y +++ /dev/null @@ -1,913 +0,0 @@ -/* parse.y - parser for flex input */ - -%token CHAR NUMBER SECTEND SCDECL XSCDECL NAME PREVCCL EOF_OP -%token OPTION_OP OPT_OUTFILE OPT_PREFIX OPT_YYCLASS - -%token CCE_ALNUM CCE_ALPHA CCE_BLANK CCE_CNTRL CCE_DIGIT CCE_GRAPH -%token CCE_LOWER CCE_PRINT CCE_PUNCT CCE_SPACE CCE_UPPER CCE_XDIGIT - -%{ -/*- - * Copyright (c) 1990 The Regents of the University of California. - * All rights reserved. - * - * This code is derived from software contributed to Berkeley by - * Vern Paxson. - * - * The United States Government has rights in this work pursuant - * to contract no. DE-AC03-76SF00098 between the United States - * Department of Energy and the University of California. - * - * Redistribution and use in source and binary forms with or without - * modification are permitted provided that: (1) source distributions retain - * this entire copyright notice and comment, and (2) distributions including - * binaries display the following acknowledgement: ``This product includes - * software developed by the University of California, Berkeley and its - * contributors'' in the documentation or other materials provided with the - * distribution and in all advertising materials mentioning features or use - * of this software. Neither the name of the University nor the names of - * its contributors may be used to endorse or promote products derived from - * this software without specific prior written permission. - * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED - * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF - * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. - */ - -/* $Header$ */ - - -/* Some versions of bison are broken in that they use alloca() but don't - * declare it properly. The following is the patented (just kidding!) - * #ifdef chud to fix the problem, courtesy of Francois Pinard. - */ -#ifdef YYBISON -/* AIX requires this to be the first thing in the file. What a piece. */ -# ifdef _AIX - #pragma alloca -# endif -#endif - -#include "flexdef.h" - -/* The remainder of the alloca() cruft has to come after including flexdef.h, - * so HAVE_ALLOCA_H is (possibly) defined. - */ -#ifdef YYBISON -# ifdef __GNUC__ -# ifndef alloca -# define alloca __builtin_alloca -# endif -# else -# if HAVE_ALLOCA_H -# include -# else -# ifdef __hpux -void *alloca (); -# else -# ifdef __TURBOC__ -# include -# else -char *alloca (); -# endif -# endif -# endif -# endif -#endif - -/* Bletch, ^^^^ that was ugly! */ - - -int pat, scnum, eps, headcnt, trailcnt, anyccl, lastchar, i, rulelen; -int trlcontxt, xcluflg, currccl, cclsorted, varlength, variable_trail_rule; - -int *scon_stk; -int scon_stk_ptr; - -static int madeany = false; /* whether we've made the '.' character class */ -int previous_continued_action; /* whether the previous rule's action was '|' */ - -/* Expand a POSIX character class expression. */ -#define CCL_EXPR(func) \ - { \ - int c; \ - for ( c = 0; c < csize; ++c ) \ - if ( isascii(c) && func(c) ) \ - ccladd( currccl, c ); \ - } - -/* While POSIX defines isblank(), it's not ANSI C. */ -#define IS_BLANK(c) ((c) == ' ' || (c) == '\t') - -/* On some over-ambitious machines, such as DEC Alpha's, the default - * token type is "long" instead of "int"; this leads to problems with - * declaring yylval in flexdef.h. But so far, all the yacc's I've seen - * wrap their definitions of YYSTYPE with "#ifndef YYSTYPE"'s, so the - * following should ensure that the default token type is "int". - */ -#define YYSTYPE int - -%} - -%% -goal : initlex sect1 sect1end sect2 initforrule - { /* add default rule */ - int def_rule; - - pat = cclinit(); - cclnegate( pat ); - - def_rule = mkstate( -pat ); - - /* Remember the number of the default rule so we - * don't generate "can't match" warnings for it. - */ - default_rule = num_rules; - - finish_rule( def_rule, false, 0, 0 ); - - for ( i = 1; i <= lastsc; ++i ) - scset[i] = mkbranch( scset[i], def_rule ); - - if ( spprdflt ) - add_action( - "YY_FATAL_ERROR( \"flex scanner jammed\" )" ); - else - add_action( "ECHO" ); - - add_action( ";\n\tYY_BREAK\n" ); - } - ; - -initlex : - { /* initialize for processing rules */ - - /* Create default DFA start condition. */ - scinstal( "INITIAL", false ); - } - ; - -sect1 : sect1 startconddecl namelist1 - | sect1 options - | - | error - { synerr( "unknown error processing section 1" ); } - ; - -sect1end : SECTEND - { - check_options(); - scon_stk = allocate_integer_array( lastsc + 1 ); - scon_stk_ptr = 0; - } - ; - -startconddecl : SCDECL - { xcluflg = false; } - - | XSCDECL - { xcluflg = true; } - ; - -namelist1 : namelist1 NAME - { scinstal( nmstr, xcluflg ); } - - | NAME - { scinstal( nmstr, xcluflg ); } - - | error - { synerr( "bad start condition list" ); } - ; - -options : OPTION_OP optionlist - ; - -optionlist : optionlist option - | - ; - -option : OPT_OUTFILE '=' NAME - { - outfilename = copy_string( nmstr ); - did_outfilename = 1; - } - | OPT_PREFIX '=' NAME - { prefix = copy_string( nmstr ); } - | OPT_YYCLASS '=' NAME - { yyclass = copy_string( nmstr ); } - ; - -sect2 : sect2 scon initforrule flexrule '\n' - { scon_stk_ptr = $2; } - | sect2 scon '{' sect2 '}' - { scon_stk_ptr = $2; } - | - ; - -initforrule : - { - /* Initialize for a parse of one rule. */ - trlcontxt = variable_trail_rule = varlength = false; - trailcnt = headcnt = rulelen = 0; - current_state_type = STATE_NORMAL; - previous_continued_action = continued_action; - in_rule = true; - - new_rule(); - } - ; - -flexrule : '^' rule - { - pat = $2; - finish_rule( pat, variable_trail_rule, - headcnt, trailcnt ); - - if ( scon_stk_ptr > 0 ) - { - for ( i = 1; i <= scon_stk_ptr; ++i ) - scbol[scon_stk[i]] = - mkbranch( scbol[scon_stk[i]], - pat ); - } - - else - { - /* Add to all non-exclusive start conditions, - * including the default (0) start condition. - */ - - for ( i = 1; i <= lastsc; ++i ) - if ( ! scxclu[i] ) - scbol[i] = mkbranch( scbol[i], - pat ); - } - - if ( ! bol_needed ) - { - bol_needed = true; - - if ( performance_report > 1 ) - pinpoint_message( - "'^' operator results in sub-optimal performance" ); - } - } - - | rule - { - pat = $1; - finish_rule( pat, variable_trail_rule, - headcnt, trailcnt ); - - if ( scon_stk_ptr > 0 ) - { - for ( i = 1; i <= scon_stk_ptr; ++i ) - scset[scon_stk[i]] = - mkbranch( scset[scon_stk[i]], - pat ); - } - - else - { - for ( i = 1; i <= lastsc; ++i ) - if ( ! scxclu[i] ) - scset[i] = - mkbranch( scset[i], - pat ); - } - } - - | EOF_OP - { - if ( scon_stk_ptr > 0 ) - build_eof_action(); - - else - { - /* This EOF applies to all start conditions - * which don't already have EOF actions. - */ - for ( i = 1; i <= lastsc; ++i ) - if ( ! sceof[i] ) - scon_stk[++scon_stk_ptr] = i; - - if ( scon_stk_ptr == 0 ) - warn( - "all start conditions already have <> rules" ); - - else - build_eof_action(); - } - } - - | error - { synerr( "unrecognized rule" ); } - ; - -scon_stk_ptr : - { $$ = scon_stk_ptr; } - ; - -scon : '<' scon_stk_ptr namelist2 '>' - { $$ = $2; } - - | '<' '*' '>' - { - $$ = scon_stk_ptr; - - for ( i = 1; i <= lastsc; ++i ) - { - int j; - - for ( j = 1; j <= scon_stk_ptr; ++j ) - if ( scon_stk[j] == i ) - break; - - if ( j > scon_stk_ptr ) - scon_stk[++scon_stk_ptr] = i; - } - } - - | - { $$ = scon_stk_ptr; } - ; - -namelist2 : namelist2 ',' sconname - - | sconname - - | error - { synerr( "bad start condition list" ); } - ; - -sconname : NAME - { - if ( (scnum = sclookup( nmstr )) == 0 ) - format_pinpoint_message( - "undeclared start condition %s", - nmstr ); - else - { - for ( i = 1; i <= scon_stk_ptr; ++i ) - if ( scon_stk[i] == scnum ) - { - format_warn( - "<%s> specified twice", - scname[scnum] ); - break; - } - - if ( i > scon_stk_ptr ) - scon_stk[++scon_stk_ptr] = scnum; - } - } - ; - -rule : re2 re - { - if ( transchar[lastst[$2]] != SYM_EPSILON ) - /* Provide final transition \now/ so it - * will be marked as a trailing context - * state. - */ - $2 = link_machines( $2, - mkstate( SYM_EPSILON ) ); - - mark_beginning_as_normal( $2 ); - current_state_type = STATE_NORMAL; - - if ( previous_continued_action ) - { - /* We need to treat this as variable trailing - * context so that the backup does not happen - * in the action but before the action switch - * statement. If the backup happens in the - * action, then the rules "falling into" this - * one's action will *also* do the backup, - * erroneously. - */ - if ( ! varlength || headcnt != 0 ) - warn( - "trailing context made variable due to preceding '|' action" ); - - /* Mark as variable. */ - varlength = true; - headcnt = 0; - } - - if ( lex_compat || (varlength && headcnt == 0) ) - { /* variable trailing context rule */ - /* Mark the first part of the rule as the - * accepting "head" part of a trailing - * context rule. - * - * By the way, we didn't do this at the - * beginning of this production because back - * then current_state_type was set up for a - * trail rule, and add_accept() can create - * a new state ... - */ - add_accept( $1, - num_rules | YY_TRAILING_HEAD_MASK ); - variable_trail_rule = true; - } - - else - trailcnt = rulelen; - - $$ = link_machines( $1, $2 ); - } - - | re2 re '$' - { synerr( "trailing context used twice" ); } - - | re '$' - { - headcnt = 0; - trailcnt = 1; - rulelen = 1; - varlength = false; - - current_state_type = STATE_TRAILING_CONTEXT; - - if ( trlcontxt ) - { - synerr( "trailing context used twice" ); - $$ = mkstate( SYM_EPSILON ); - } - - else if ( previous_continued_action ) - { - /* See the comment in the rule for "re2 re" - * above. - */ - warn( - "trailing context made variable due to preceding '|' action" ); - - varlength = true; - } - - if ( lex_compat || varlength ) - { - /* Again, see the comment in the rule for - * "re2 re" above. - */ - add_accept( $1, - num_rules | YY_TRAILING_HEAD_MASK ); - variable_trail_rule = true; - } - - trlcontxt = true; - - eps = mkstate( SYM_EPSILON ); - $$ = link_machines( $1, - link_machines( eps, mkstate( '\n' ) ) ); - } - - | re - { - $$ = $1; - - if ( trlcontxt ) - { - if ( lex_compat || (varlength && headcnt == 0) ) - /* Both head and trail are - * variable-length. - */ - variable_trail_rule = true; - else - trailcnt = rulelen; - } - } - ; - - -re : re '|' series - { - varlength = true; - $$ = mkor( $1, $3 ); - } - - | series - { $$ = $1; } - ; - - -re2 : re '/' - { - /* This rule is written separately so the - * reduction will occur before the trailing - * series is parsed. - */ - - if ( trlcontxt ) - synerr( "trailing context used twice" ); - else - trlcontxt = true; - - if ( varlength ) - /* We hope the trailing context is - * fixed-length. - */ - varlength = false; - else - headcnt = rulelen; - - rulelen = 0; - - current_state_type = STATE_TRAILING_CONTEXT; - $$ = $1; - } - ; - -series : series singleton - { - /* This is where concatenation of adjacent patterns - * gets done. - */ - $$ = link_machines( $1, $2 ); - } - - | singleton - { $$ = $1; } - ; - -singleton : singleton '*' - { - varlength = true; - - $$ = mkclos( $1 ); - } - - | singleton '+' - { - varlength = true; - $$ = mkposcl( $1 ); - } - - | singleton '?' - { - varlength = true; - $$ = mkopt( $1 ); - } - - | singleton '{' NUMBER ',' NUMBER '}' - { - varlength = true; - - if ( $3 > $5 || $3 < 0 ) - { - synerr( "bad iteration values" ); - $$ = $1; - } - else - { - if ( $3 == 0 ) - { - if ( $5 <= 0 ) - { - synerr( - "bad iteration values" ); - $$ = $1; - } - else - $$ = mkopt( - mkrep( $1, 1, $5 ) ); - } - else - $$ = mkrep( $1, $3, $5 ); - } - } - - | singleton '{' NUMBER ',' '}' - { - varlength = true; - - if ( $3 <= 0 ) - { - synerr( "iteration value must be positive" ); - $$ = $1; - } - - else - $$ = mkrep( $1, $3, INFINITY ); - } - - | singleton '{' NUMBER '}' - { - /* The singleton could be something like "(foo)", - * in which case we have no idea what its length - * is, so we punt here. - */ - varlength = true; - - if ( $3 <= 0 ) - { - synerr( "iteration value must be positive" ); - $$ = $1; - } - - else - $$ = link_machines( $1, - copysingl( $1, $3 - 1 ) ); - } - - | '.' - { - if ( ! madeany ) - { - /* Create the '.' character class. */ - anyccl = cclinit(); - ccladd( anyccl, '\n' ); - cclnegate( anyccl ); - - if ( useecs ) - mkeccl( ccltbl + cclmap[anyccl], - ccllen[anyccl], nextecm, - ecgroup, csize, csize ); - - madeany = true; - } - - ++rulelen; - - $$ = mkstate( -anyccl ); - } - - | fullccl - { - if ( ! cclsorted ) - /* Sort characters for fast searching. We - * use a shell sort since this list could - * be large. - */ - cshell( ccltbl + cclmap[$1], ccllen[$1], true ); - - if ( useecs ) - mkeccl( ccltbl + cclmap[$1], ccllen[$1], - nextecm, ecgroup, csize, csize ); - - ++rulelen; - - $$ = mkstate( -$1 ); - } - - | PREVCCL - { - ++rulelen; - - $$ = mkstate( -$1 ); - } - - | '"' string '"' - { $$ = $2; } - - | '(' re ')' - { $$ = $2; } - - | CHAR - { - ++rulelen; - - if ( caseins && $1 >= 'A' && $1 <= 'Z' ) - $1 = clower( $1 ); - - $$ = mkstate( $1 ); - } - ; - -fullccl : '[' ccl ']' - { $$ = $2; } - - | '[' '^' ccl ']' - { - cclnegate( $3 ); - $$ = $3; - } - ; - -ccl : ccl CHAR '-' CHAR - { - if ( caseins ) - { - if ( $2 >= 'A' && $2 <= 'Z' ) - $2 = clower( $2 ); - if ( $4 >= 'A' && $4 <= 'Z' ) - $4 = clower( $4 ); - } - - if ( $2 > $4 ) - synerr( "negative range in character class" ); - - else - { - for ( i = $2; i <= $4; ++i ) - ccladd( $1, i ); - - /* Keep track if this ccl is staying in - * alphabetical order. - */ - cclsorted = cclsorted && ($2 > lastchar); - lastchar = $4; - } - - $$ = $1; - } - - | ccl CHAR - { - if ( caseins && $2 >= 'A' && $2 <= 'Z' ) - $2 = clower( $2 ); - - ccladd( $1, $2 ); - cclsorted = cclsorted && ($2 > lastchar); - lastchar = $2; - $$ = $1; - } - - | ccl ccl_expr - { - /* Too hard to properly maintain cclsorted. */ - cclsorted = false; - $$ = $1; - } - - | - { - cclsorted = true; - lastchar = 0; - currccl = $$ = cclinit(); - } - ; - -ccl_expr: CCE_ALNUM { CCL_EXPR(isalnum) } - | CCE_ALPHA { CCL_EXPR(isalpha) } - | CCE_BLANK { CCL_EXPR(IS_BLANK) } - | CCE_CNTRL { CCL_EXPR(iscntrl) } - | CCE_DIGIT { CCL_EXPR(isdigit) } - | CCE_GRAPH { CCL_EXPR(isgraph) } - | CCE_LOWER { CCL_EXPR(islower) } - | CCE_PRINT { CCL_EXPR(isprint) } - | CCE_PUNCT { CCL_EXPR(ispunct) } - | CCE_SPACE { CCL_EXPR(isspace) } - | CCE_UPPER { - if ( caseins ) - CCL_EXPR(islower) - else - CCL_EXPR(isupper) - } - | CCE_XDIGIT { CCL_EXPR(isxdigit) } - ; - -string : string CHAR - { - if ( caseins && $2 >= 'A' && $2 <= 'Z' ) - $2 = clower( $2 ); - - ++rulelen; - - $$ = link_machines( $1, mkstate( $2 ) ); - } - - | - { $$ = mkstate( SYM_EPSILON ); } - ; - -%% - - -/* build_eof_action - build the "<>" action for the active start - * conditions - */ - -void build_eof_action() - { - register int i; - char action_text[MAXLINE]; - - for ( i = 1; i <= scon_stk_ptr; ++i ) - { - if ( sceof[scon_stk[i]] ) - format_pinpoint_message( - "multiple <> rules for start condition %s", - scname[scon_stk[i]] ); - - else - { - sceof[scon_stk[i]] = true; - sprintf( action_text, "case YY_STATE_EOF(%s):\n", - scname[scon_stk[i]] ); - add_action( action_text ); - } - } - - line_directive_out( (FILE *) 0, 1 ); - - /* This isn't a normal rule after all - don't count it as - * such, so we don't have any holes in the rule numbering - * (which make generating "rule can never match" warnings - * more difficult. - */ - --num_rules; - ++num_eof_rules; - } - - -/* format_synerr - write out formatted syntax error */ - -void format_synerr( msg, arg ) -char msg[], arg[]; - { - char errmsg[MAXLINE]; - - (void) sprintf( errmsg, msg, arg ); - synerr( errmsg ); - } - - -/* synerr - report a syntax error */ - -void synerr( str ) -char str[]; - { - syntaxerror = true; - pinpoint_message( str ); - } - - -/* format_warn - write out formatted warning */ - -void format_warn( msg, arg ) -char msg[], arg[]; - { - char warn_msg[MAXLINE]; - - (void) sprintf( warn_msg, msg, arg ); - warn( warn_msg ); - } - - -/* warn - report a warning, unless -w was given */ - -void warn( str ) -char str[]; - { - line_warning( str, linenum ); - } - -/* format_pinpoint_message - write out a message formatted with one string, - * pinpointing its location - */ - -void format_pinpoint_message( msg, arg ) -char msg[], arg[]; - { - char errmsg[MAXLINE]; - - (void) sprintf( errmsg, msg, arg ); - pinpoint_message( errmsg ); - } - - -/* pinpoint_message - write out a message, pinpointing its location */ - -void pinpoint_message( str ) -char str[]; - { - line_pinpoint( str, linenum ); - } - - -/* line_warning - report a warning at a given line, unless -w was given */ - -void line_warning( str, line ) -char str[]; -int line; - { - char warning[MAXLINE]; - - if ( ! nowarn ) - { - sprintf( warning, "warning, %s", str ); - line_pinpoint( warning, line ); - } - } - - -/* line_pinpoint - write out a message, pinpointing it at the given line */ - -void line_pinpoint( str, line ) -char str[]; -int line; - { - fprintf( stderr, "\"%s\", line %d: %s\n", infilename, line, str ); - } - - -/* yyerror - eat up an error message from the parser; - * currently, messages are ignore - */ - -void yyerror( msg ) -char msg[]; - { - } diff --git a/commands/flex-2.5.4/scan.l b/commands/flex-2.5.4/scan.l deleted file mode 100644 index fee78ab75..000000000 --- a/commands/flex-2.5.4/scan.l +++ /dev/null @@ -1,710 +0,0 @@ -/* scan.l - scanner for flex input */ - -%{ -/*- - * Copyright (c) 1990 The Regents of the University of California. - * All rights reserved. - * - * This code is derived from software contributed to Berkeley by - * Vern Paxson. - * - * The United States Government has rights in this work pursuant - * to contract no. DE-AC03-76SF00098 between the United States - * Department of Energy and the University of California. - * - * Redistribution and use in source and binary forms with or without - * modification are permitted provided that: (1) source distributions retain - * this entire copyright notice and comment, and (2) distributions including - * binaries display the following acknowledgement: ``This product includes - * software developed by the University of California, Berkeley and its - * contributors'' in the documentation or other materials provided with the - * distribution and in all advertising materials mentioning features or use - * of this software. Neither the name of the University nor the names of - * its contributors may be used to endorse or promote products derived from - * this software without specific prior written permission. - * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED - * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF - * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. - */ - -/* $Header$ */ - -#include "flexdef.h" -#include "parse.h" - -#define ACTION_ECHO add_action( yytext ) -#define ACTION_IFDEF(def, should_define) \ - { \ - if ( should_define ) \ - action_define( def, 1 ); \ - } - -#define MARK_END_OF_PROLOG mark_prolog(); - -#define YY_DECL \ - int flexscan() - -#define RETURNCHAR \ - yylval = (unsigned char) yytext[0]; \ - return CHAR; - -#define RETURNNAME \ - strcpy( nmstr, yytext ); \ - return NAME; - -#define PUT_BACK_STRING(str, start) \ - for ( i = strlen( str ) - 1; i >= start; --i ) \ - unput((str)[i]) - -#define CHECK_REJECT(str) \ - if ( all_upper( str ) ) \ - reject = true; - -#define CHECK_YYMORE(str) \ - if ( all_lower( str ) ) \ - yymore_used = true; -%} - -%option caseless nodefault outfile="scan.c" stack noyy_top_state -%option nostdinit - -%x SECT2 SECT2PROLOG SECT3 CODEBLOCK PICKUPDEF SC CARETISBOL NUM QUOTE -%x FIRSTCCL CCL ACTION RECOVER COMMENT ACTION_STRING PERCENT_BRACE_ACTION -%x OPTION LINEDIR - -WS [[:blank:]]+ -OPTWS [[:blank:]]* -NOT_WS [^[:blank:]\n] - -NL \r?\n - -NAME ([[:alpha:]_][[:alnum:]_-]*) -NOT_NAME [^[:alpha:]_*\n]+ - -SCNAME {NAME} - -ESCSEQ (\\([^\n]|[0-7]{1,3}|x[[:xdigit:]]{1,2})) - -FIRST_CCL_CHAR ([^\\\n]|{ESCSEQ}) -CCL_CHAR ([^\\\n\]]|{ESCSEQ}) -CCL_EXPR ("[:"[[:alpha:]]+":]") - -LEXOPT [aceknopr] - -%% - static int bracelevel, didadef, indented_code; - static int doing_rule_action = false; - static int option_sense; - - int doing_codeblock = false; - int i; - Char nmdef[MAXLINE], myesc(); - - -{ - ^{WS} indented_code = true; BEGIN(CODEBLOCK); - ^"/*" ACTION_ECHO; yy_push_state( COMMENT ); - ^#{OPTWS}line{WS} yy_push_state( LINEDIR ); - ^"%s"{NAME}? return SCDECL; - ^"%x"{NAME}? return XSCDECL; - ^"%{".*{NL} { - ++linenum; - line_directive_out( (FILE *) 0, 1 ); - indented_code = false; - BEGIN(CODEBLOCK); - } - - {WS} /* discard */ - - ^"%%".* { - sectnum = 2; - bracelevel = 0; - mark_defs1(); - line_directive_out( (FILE *) 0, 1 ); - BEGIN(SECT2PROLOG); - return SECTEND; - } - - ^"%pointer".*{NL} yytext_is_array = false; ++linenum; - ^"%array".*{NL} yytext_is_array = true; ++linenum; - - ^"%option" BEGIN(OPTION); return OPTION_OP; - - ^"%"{LEXOPT}{OPTWS}[[:digit:]]*{OPTWS}{NL} ++linenum; /* ignore */ - ^"%"{LEXOPT}{WS}.*{NL} ++linenum; /* ignore */ - - ^"%"[^sxaceknopr{}].* synerr( _( "unrecognized '%' directive" ) ); - - ^{NAME} { - strcpy( nmstr, yytext ); - didadef = false; - BEGIN(PICKUPDEF); - } - - {SCNAME} RETURNNAME; - ^{OPTWS}{NL} ++linenum; /* allows blank lines in section 1 */ - {OPTWS}{NL} ACTION_ECHO; ++linenum; /* maybe end of comment line */ -} - - -{ - "*/" ACTION_ECHO; yy_pop_state(); - "*" ACTION_ECHO; - [^*\n]+ ACTION_ECHO; - [^*\n]*{NL} ++linenum; ACTION_ECHO; -} - -{ - \n yy_pop_state(); - [[:digit:]]+ linenum = myctoi( yytext ); - - \"[^"\n]*\" { - flex_free( (void *) infilename ); - infilename = copy_string( yytext + 1 ); - infilename[strlen( infilename ) - 1] = '\0'; - } - . /* ignore spurious characters */ -} - -{ - ^"%}".*{NL} ++linenum; BEGIN(INITIAL); - - {NAME}|{NOT_NAME}|. ACTION_ECHO; - - {NL} { - ++linenum; - ACTION_ECHO; - if ( indented_code ) - BEGIN(INITIAL); - } -} - - -{ - {WS} /* separates name and definition */ - - {NOT_WS}.* { - strcpy( (char *) nmdef, yytext ); - - /* Skip trailing whitespace. */ - for ( i = strlen( (char *) nmdef ) - 1; - i >= 0 && (nmdef[i] == ' ' || nmdef[i] == '\t'); - --i ) - ; - - nmdef[i + 1] = '\0'; - - ndinstal( nmstr, nmdef ); - didadef = true; - } - - {NL} { - if ( ! didadef ) - synerr( _( "incomplete name definition" ) ); - BEGIN(INITIAL); - ++linenum; - } -} - - -