From: Thomas Cort Date: Tue, 29 Oct 2013 20:48:19 +0000 (-0400) Subject: Importing usr.bin/unifdef X-Git-Tag: v3.3.0~711 X-Git-Url: http://zhaoyanbai.com/repos/%22http:/www.isc.org/icons/index.css?a=commitdiff_plain;h=refs%2Fchanges%2F90%2F1090%2F1;p=minix.git Importing usr.bin/unifdef No Minix-specific changes needed. Change-Id: Icb828fb19f5f3a411a3f2e9dde35c2da30a04342 --- diff --git a/distrib/sets/lists/minix/mi b/distrib/sets/lists/minix/mi index fd6f52e77..c93748113 100644 --- a/distrib/sets/lists/minix/mi +++ b/distrib/sets/lists/minix/mi @@ -524,6 +524,8 @@ ./usr/bin/uname minix-sys ./usr/bin/uncompress minix-sys ./usr/bin/unexpand minix-sys +./usr/bin/unifdef minix-sys +./usr/bin/unifdefall minix-sys ./usr/bin/uniq minix-sys ./usr/bin/units minix-sys ./usr/bin/unlzma minix-sys @@ -2096,6 +2098,8 @@ ./usr/man/man1/uname.1 minix-sys ./usr/man/man1/uncompress.1 minix-sys ./usr/man/man1/unexpand.1 minix-sys +./usr/man/man1/unifdef.1 minix-sys +./usr/man/man1/unifdefall.1 minix-sys ./usr/man/man1/uniq.1 minix-sys ./usr/man/man1/units.1 minix-sys ./usr/man/man1/unlzma.1 minix-sys diff --git a/releasetools/nbsd_ports b/releasetools/nbsd_ports index ccfb793c4..67274b92b 100644 --- a/releasetools/nbsd_ports +++ b/releasetools/nbsd_ports @@ -219,6 +219,7 @@ 2012/10/17 12:00:00,usr.bin/tr 2012/10/17 12:00:00,usr.bin/tsort 2012/10/17 12:00:00,usr.bin/tty +2012/10/17 12:00:00,usr.bin/unifdef 2010/10/06 07:59:18,usr.bin/uniq 2013/10/23 12:00:00,usr.bin/units 2012/10/17 12:00:00,usr.bin/unvis diff --git a/usr.bin/Makefile b/usr.bin/Makefile index cf6652067..179cd9528 100644 --- a/usr.bin/Makefile +++ b/usr.bin/Makefile @@ -26,7 +26,7 @@ SUBDIR= asa \ shuffle sed seq \ sort split stat su \ tee tic tput \ - tr tsort tty unexpand \ + tr tsort tty unexpand unifdef \ toproto \ uniq units unvis unzip users \ uuidgen vis \ diff --git a/usr.bin/unifdef/Makefile b/usr.bin/unifdef/Makefile new file mode 100644 index 000000000..0551e2d1c --- /dev/null +++ b/usr.bin/unifdef/Makefile @@ -0,0 +1,10 @@ +# $NetBSD: Makefile,v 1.6 2003/08/01 11:51:14 lukem Exp $ +# @(#)Makefile 8.1 (Berkeley) 6/6/93 + +PROG= unifdef + +SCRIPTS=unifdefall.sh + +MLINKS= unifdef.1 unifdefall.1 + +.include diff --git a/usr.bin/unifdef/unifdef.1 b/usr.bin/unifdef/unifdef.1 new file mode 100644 index 000000000..fb75d851c --- /dev/null +++ b/usr.bin/unifdef/unifdef.1 @@ -0,0 +1,347 @@ +.\" $NetBSD: unifdef.1,v 1.12 2009/06/11 03:16:34 ginsbach Exp $ +.\" +.\" Copyright (c) 1985, 1991, 1993 +.\" The Regents of the University of California. All rights reserved. +.\" +.\" This code is derived from software contributed to Berkeley by +.\" Dave Yost. +.\" +.\" Redistribution and use in source and binary forms, with or without +.\" modification, are permitted provided that the following conditions +.\" are met: +.\" 1. Redistributions of source code must retain the above copyright +.\" notice, this list of conditions and the following disclaimer. +.\" 2. Redistributions in binary form must reproduce the above copyright +.\" notice, this list of conditions and the following disclaimer in the +.\" documentation and/or other materials provided with the distribution. +.\" 3. 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 BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND +.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE +.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE +.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE +.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL +.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS +.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) +.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT +.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY +.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF +.\" SUCH DAMAGE. +.\" +.\" Portions of this code (support for #if and #elif) are Copyright (c) +.\" 2002, 2003 Tony Finch. +.\" +.\" Redistribution and use in source and binary forms, with or without +.\" modification, are permitted provided that the following conditions +.\" are met: +.\" 1. Redistributions of source code must retain the above copyright +.\" notice, this list of conditions and the following disclaimer. +.\" 2. Redistributions in binary form must reproduce the above copyright +.\" notice, this list of conditions and the following disclaimer in the +.\" documentation and/or other materials provided with the distribution. +.\" 3. All advertising materials mentioning features or use of this software +.\" must display the following acknowledgement: +.\" This product includes software developed by the University of +.\" California, Berkeley and its contributors. +.\" 4. 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 BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND +.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE +.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE +.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE +.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL +.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS +.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) +.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT +.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY +.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF +.\" SUCH DAMAGE. +.\" +.\" @(#)unifdef.1 8.2 (Berkeley) 4/1/94 +.\" $dotat: things/unifdef.1,v 1.45 2003/01/20 14:37:08 fanf2 Exp $ +.\" $FreeBSD: src/usr.bin/unifdef/unifdef.1,v 1.19 2003/01/20 12:41:41 fanf Exp $ +.\" +.Dd June 5, 2009 +.Dt UNIFDEF 1 +.Os +.Sh NAME +.Nm unifdef , +.Nm unifdefall +.Nd remove preprocessor conditionals from code +.Sh SYNOPSIS +.Nm +.Op Fl ceklst +.Op Fl I Ns Ar path +.Op Fl D Ns Ar sym Ns Op = Ns Ar val +.Op Fl U Ns Ar sym +.Op Fl iD Ns Ar sym Ns Op = Ns Ar val +.Op Fl iU Ns Ar sym +.Ar ... +.Op Fl o Ar output +.Op Ar file +.Nm unifdefall +.Op Fl I Ns Ar path +.Ar ... +.Ar file +.Sh DESCRIPTION +The +.Nm +utility selectively processes conditional +.Xr cpp 1 +directives. +It removes from a file both the directives and any additional text +that they specify should be removed, while otherwise leaving the +file alone. +.Pp +The +.Nm +utility acts on +.Ic #if , #ifdef , #ifndef , #elif , #else , +and +.Ic #endif +lines, +and it understands only the commonly-used subset +of the expression syntax for +.Ic #if +and +.Ic #elif +lines. +It handles +integer values of symbols defined on the command line, +the +.Fn defined +operator applied to symbols defined or undefined on the command line, +the operators +.Ic \&! , \*[Lt] , \*[Gt] , \*[Lt]= , \*[Gt]= , == , != , \*[Am]\*[Am] , || , +and parenthesized expressions. +Anything that it does not understand is passed through unharmed. +It only processes +.Ic #ifdef +and +.Ic #ifndef +directives if the symbol is specified on the command line, +otherwise they are also passed through unchanged. +By default, it ignores +.Ic #if +and +.Ic #elif +lines with constant expressions, +or they may be processed by specifying the +.Fl k +flag on the command line. +.Pp +The +.Nm +utility also understands just enough about C +to know when one of the directives is inactive +because it is inside +a comment, +or affected by a backslash-continued line. +It spots unusually-formatted preprocessor directives +and knows when the layout is too odd to handle. +.Pp +A script called +.Nm unifdefall +can be used to remove all conditional +.Xr cpp 1 +directives from a file. +It uses +.Nm Fl s +and +.Nm cpp Fl dM +to get lists of all the controlling symbols +and their definitions (or lack thereof), +then invokes +.Nm +with appropriate arguments to process the file. +.Pp +Available options: +.Bl -tag -width indent -compact +.It Fl D Ns Ar sym Ns Op = Ns Ar val +Specify that a symbol is defined, +and optionally specify what value to give it +for the purpose of handling +.Ic #if +and +.Ic #elif +directives. +.It Fl U Ns Ar sym +Specify that a symbol is undefined. +If the same symbol appears in more than one argument, +the last occurrence dominates. +.It Fl c +If the +.Fl c +flag is specified, +then the operation of +.Nm +is complemented, +i.e., the lines that would have been removed or blanked +are retained and vice versa. +.It Fl e +Because +.Nm +processes its input one line at a time, +it cannot remove preprocessor directives that span more than one line. +The most common example of this is a directive with a multi-line +comment hanging off its right hand end. +By default, +if +.Nm +has to process such a directive, +it will complain that the line is too obfuscated. +The +.Fl e +option changes the behaviour so that, +where possible, +such lines are left unprocessed instead of reporting an error. +.It Fl k +Process +.Ic #if +and +.Ic #elif +lines with constant expressions. +By default, sections controlled by such lines are passed through unchanged +because they typically start +.Dq Li "#if 0" +and are used as a kind of comment to sketch out future or past development. +It would be rude to strip them out, just as it would be for normal comments. +.It Fl l +Replace removed lines with blank lines +instead of deleting them. +.It Fl o Ar output +The argument given is the name of an +.Ar output +file to be used instead of the standard output. +This file can be the same as the input file. +.It Fl s +Instead of processing the input file as usual, +this option causes +.Nm +to produce a list of symbols that appear in expressions +that +.Nm +understands. +It is useful in conjunction with the +.Fl dM +option of +.Xr cpp 1 +for creating +.Nm +command lines. +.It Fl t +Disables parsing for C comments +and line continuations, +which is useful +for plain text. +.It Fl iD Ns Ar sym Ns Op = Ns Ar val +.It Fl iU Ns Ar sym +Ignore +.Ic #ifdef Ns s . +If your C code uses +.Ic #ifdef Ns s +to delimit non-C lines, +such as comments +or code which is under construction, +then you must tell +.Nm +which symbols are used for that purpose so that it will not try to parse +comments +and line continuations +inside those +.Ic #ifdef Ns s . +One specifies ignored symbols with +.Fl iD Ns Ar sym Ns Oo = Ns Ar val Oc +and +.Fl iU Ns Ar sym +similar to +.Fl D Ns Ar sym Ns Op = Ns Ar val +and +.Fl U Ns Ar sym +above. +.It Fl I Ns Ar path +Specifies to +.Nm unifdefall +an additional place to look for +.Ic #include +files. +This option is ignored by +.Nm +for compatibility with +.Xr cpp 1 +and to simplify the implementation of +.Nm unifdefall . +.El +.Pp +The +.Nm +utility copies its output to +.Em stdout +and will take its input from +.Em stdin +if no +.Ar file +argument is given. +.Pp +The +.Nm +utility works nicely with the +.Fl D Ns Ar sym +option of +.Xr diff 1 . +.Sh DIAGNOSTICS +.Bl -item +.It +Too many levels of nesting. +.It +Inappropriate +.Ic #elif , +.Ic #else +or +.Ic #endif . +.It +Obfuscated preprocessor control line. +.It +Premature +.Dv EOF +(with the line number of the most recent unterminated +.Ic #if ) . +.It +.Dv EOF +in comment. +.El +.Pp +The +.Nm +utility exits 0 if the output is an exact copy of the input, +1 if not, and 2 if in trouble. +.Sh SEE ALSO +.Xr cpp 1 , +.Xr diff 1 +.Sh HISTORY +The +.Nm +command appeared in +.Bx 4.3 . +.Tn ANSI\~C +support was added in +.Fx 4.7 . +.Sh BUGS +Expression evaluation is very limited. +.Pp +Preprocessor control lines split across more than one physical line +(because of comments or backslash-newline) +cannot be handled in every situation. +.Pp +Trigraphs are not recognized. +.Pp +There is no support for symbols with different definitions at +different points in the source file. +.Pp +The text-mode and ignore functionality does not correspond to modern +.Xr cpp 1 +behaviour. diff --git a/usr.bin/unifdef/unifdef.c b/usr.bin/unifdef/unifdef.c new file mode 100644 index 000000000..702e3ecb0 --- /dev/null +++ b/usr.bin/unifdef/unifdef.c @@ -0,0 +1,1037 @@ +/* $NetBSD: unifdef.c,v 1.22 2012/10/13 18:26:03 christos Exp $ */ + +/* + * Copyright (c) 1985, 1993 + * The Regents of the University of California. All rights reserved. + * + * This code is derived from software contributed to Berkeley by + * Dave Yost. It was rewritten to support ANSI C by Tony Finch. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. 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 BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +/* + * Copyright (c) 2002, 2003 Tony Finch + * + * This code is derived from software contributed to Berkeley by + * Dave Yost. It was rewritten to support ANSI C by Tony Finch. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. 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 BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#include + +#ifndef lint +#if 0 +static const char copyright[] = +"@(#) Copyright (c) 1985, 1993\n\ + The Regents of the University of California. All rights reserved.\n"; +#endif +#ifdef __IDSTRING +__IDSTRING(Berkeley, "@(#)unifdef.c 8.1 (Berkeley) 6/6/93"); +__IDSTRING(NetBSD, "$NetBSD: unifdef.c,v 1.22 2012/10/13 18:26:03 christos Exp $"); +__IDSTRING(dotat, "$dotat: things/unifdef.c,v 1.161 2003/07/01 15:32:48 fanf2 Exp $"); +#endif +#endif /* not lint */ +#ifdef __FBSDID +__FBSDID("$FreeBSD: src/usr.bin/unifdef/unifdef.c,v 1.18 2003/07/01 15:30:43 fanf Exp $"); +#endif + +/* + * unifdef - remove ifdef'ed lines + * + * Wishlist: + * provide an option which will append the name of the + * appropriate symbol after #else's and #endif's + * provide an option which will check symbols after + * #else's and #endif's to see that they match their + * corresponding #ifdef or #ifndef + * generate #line directives in place of deleted code + * + * The first two items above require better buffer handling, which would + * also make it possible to handle all "dodgy" directives correctly. + */ + +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include + +#include "stdbool.h" + +/* types of input lines: */ +typedef enum { + LT_TRUEI, /* a true #if with ignore flag */ + LT_FALSEI, /* a false #if with ignore flag */ + LT_IF, /* an unknown #if */ + LT_TRUE, /* a true #if */ + LT_FALSE, /* a false #if */ + LT_ELIF, /* an unknown #elif */ + LT_ELTRUE, /* a true #elif */ + LT_ELFALSE, /* a false #elif */ + LT_ELSE, /* #else */ + LT_ENDIF, /* #endif */ + LT_DODGY, /* flag: directive is not on one line */ + LT_DODGY_LAST = LT_DODGY + LT_ENDIF, + LT_PLAIN, /* ordinary line */ + LT_EOF, /* end of file */ + LT_COUNT +} Linetype; + +static char const * const linetype_name[] = { + "TRUEI", "FALSEI", "IF", "TRUE", "FALSE", + "ELIF", "ELTRUE", "ELFALSE", "ELSE", "ENDIF", + "DODGY TRUEI", "DODGY FALSEI", + "DODGY IF", "DODGY TRUE", "DODGY FALSE", + "DODGY ELIF", "DODGY ELTRUE", "DODGY ELFALSE", + "DODGY ELSE", "DODGY ENDIF", + "PLAIN", "EOF" +}; + +/* state of #if processing */ +typedef enum { + IS_OUTSIDE, + IS_FALSE_PREFIX, /* false #if followed by false #elifs */ + IS_TRUE_PREFIX, /* first non-false #(el)if is true */ + IS_PASS_MIDDLE, /* first non-false #(el)if is unknown */ + IS_FALSE_MIDDLE, /* a false #elif after a pass state */ + IS_TRUE_MIDDLE, /* a true #elif after a pass state */ + IS_PASS_ELSE, /* an else after a pass state */ + IS_FALSE_ELSE, /* an else after a true state */ + IS_TRUE_ELSE, /* an else after only false states */ + IS_FALSE_TRAILER, /* #elifs after a true are false */ + IS_COUNT +} Ifstate; + +static char const * const ifstate_name[] = { + "OUTSIDE", "FALSE_PREFIX", "TRUE_PREFIX", + "PASS_MIDDLE", "FALSE_MIDDLE", "TRUE_MIDDLE", + "PASS_ELSE", "FALSE_ELSE", "TRUE_ELSE", + "FALSE_TRAILER" +}; + +/* state of comment parser */ +typedef enum { + NO_COMMENT = false, /* outside a comment */ + C_COMMENT, /* in a comment like this one */ + CXX_COMMENT, /* between // and end of line */ + STARTING_COMMENT, /* just after slash-backslash-newline */ + FINISHING_COMMENT /* star-backslash-newline in a C comment */ +} Comment_state; + +static char const * const comment_name[] = { + "NO", "C", "CXX", "STARTING", "FINISHING" +}; + +/* state of preprocessor line parser */ +typedef enum { + LS_START, /* only space and comments on this line */ + LS_HASH, /* only space, comments, and a hash */ + LS_DIRTY /* this line can't be a preprocessor line */ +} Line_state; + +static char const * const linestate_name[] = { + "START", "HASH", "DIRTY" +}; + +/* + * Minimum translation limits from ISO/IEC 9899:1999 5.2.4.1 + */ +#define MAXDEPTH 64 /* maximum #if nesting */ +#define MAXLINE 4096 /* maximum length of line */ +#define MAXSYMS 4096 /* maximum number of symbols */ + +/* + * Sometimes when editing a keyword the replacement text is longer, so + * we leave some space at the end of the tline buffer to accommodate this. + */ +#define EDITSLOP 10 + +/* + * Globals. + */ + +static bool complement; /* -c: do the complement */ +static bool debugging; /* -d: debugging reports */ +static bool iocccok; /* -e: fewer IOCCC errors */ +static bool killconsts; /* -k: eval constant #ifs */ +static bool lnblank; /* -l: blank deleted lines */ +static bool symlist; /* -s: output symbol list */ +static bool text; /* -t: this is a text file */ + +static const char *symname[MAXSYMS]; /* symbol name */ +static const char *value[MAXSYMS]; /* -Dsym=value */ +static bool ignore[MAXSYMS]; /* -iDsym or -iUsym */ +static int nsyms; /* number of symbols */ + +static FILE *input; /* input file pointer */ +static FILE *output; /* output file pointer */ +static const char *filename; /* input file name */ +static char *ofilename; /* output file name */ +static char tmpname[MAXPATHLEN]; /* used when overwriting */ +static int linenum; /* current line number */ +static int overwriting; /* output overwrites input */ + +static char tline[MAXLINE+EDITSLOP];/* input buffer plus space */ +static char *keyword; /* used for editing #elif's */ + +static Comment_state incomment; /* comment parser state */ +static Line_state linestate; /* #if line parser state */ +static Ifstate ifstate[MAXDEPTH]; /* #if processor state */ +static bool ignoring[MAXDEPTH]; /* ignore comments state */ +static int stifline[MAXDEPTH]; /* start of current #if */ +static int depth; /* current #if nesting */ +static bool keepthis; /* don't delete constant #if */ + +static int exitstat; /* program exit status */ + +static void addsym(bool, bool, char *); +static void debug(const char *, ...) __printflike(1, 2); +__dead static void done(void); +__dead static void error(const char *); +static int findsym(const char *); +static void flushline(bool); +static Linetype get_line(void); +static Linetype ifeval(const char **); +static void ignoreoff(void); +static void ignoreon(void); +static void keywordedit(const char *); +static void nest(void); +__dead static void process(void); +static const char *skipcomment(const char *); +static const char *skipsym(const char *); +static void state(Ifstate); +static int strlcmp(const char *, const char *, size_t); +__dead static void usage(void); + +#define endsym(c) (!isalpha((unsigned char)c) && !isdigit((unsigned char)c) && c != '_') + +/* + * The main program. + */ +int +main(int argc, char *argv[]) +{ + int opt; + struct stat isb, osb; + + while ((opt = getopt(argc, argv, "i:D:U:I:o:cdeklst")) != -1) + switch (opt) { + case 'i': /* treat stuff controlled by these symbols as text */ + /* + * For strict backwards-compatibility the U or D + * should be immediately after the -i but it doesn't + * matter much if we relax that requirement. + */ + opt = *optarg++; + if (opt == 'D') + addsym(true, true, optarg); + else if (opt == 'U') + addsym(true, false, optarg); + else + usage(); + break; + case 'D': /* define a symbol */ + addsym(false, true, optarg); + break; + case 'U': /* undef a symbol */ + addsym(false, false, optarg); + break; + case 'I': + /* no-op for compatibility with cpp */ + break; + case 'c': /* treat -D as -U and vice versa */ + complement = true; + break; + case 'd': + debugging = true; + break; + case 'e': /* fewer errors from dodgy lines */ + iocccok = true; + break; + case 'k': /* process constant #ifs */ + killconsts = true; + break; + case 'l': /* blank deleted lines instead of omitting them */ + lnblank = true; + break; + case 'o': /* output to a file */ + ofilename = optarg; + break; + case 's': /* only output list of symbols that control #ifs */ + symlist = true; + break; + case 't': /* don't parse C comments */ + text = true; + break; + default: + usage(); + } + argc -= optind; + argv += optind; + if (nsyms == 0 && !symlist) { + warnx("must -D or -U at least one symbol"); + usage(); + } + if (argc > 1) { + errx(2, "can only do one file"); + } else if (argc == 1 && strcmp(*argv, "-") != 0) { + filename = *argv; + input = fopen(filename, "r"); + if (input == NULL) + err(2, "can't open %s", filename); + } else { + filename = "[stdin]"; + input = stdin; + } + if (ofilename == NULL) { + output = stdout; + } else { + if (stat(ofilename, &osb) == 0) { + if (fstat(fileno(input), &isb) != 0) + err(2, "can't fstat %s", filename); + + overwriting = (osb.st_dev == isb.st_dev && + osb.st_ino == isb.st_ino); + } + if (overwriting) { + int ofd; + + snprintf(tmpname, sizeof(tmpname), "%s/unifdef.XXXXXX", + dirname(ofilename)); + if ((ofd = mkstemp(tmpname)) != -1) + output = fdopen(ofd, "w+"); + if (output == NULL) + err(2, "can't create temporary file"); + fchmod(ofd, isb.st_mode & ACCESSPERMS); + } else { + output = fopen(ofilename, "w"); + if (output == NULL) + err(2, "can't open %s", ofilename); + } + } + process(); + abort(); /* bug */ +} + +static void +usage(void) +{ + fprintf(stderr, "usage: unifdef [-cdeklst] [-o output]" + " [-Dsym[=val]] [-Usym] [-iDsym[=val]] [-iUsym] ... [file]\n"); + exit(2); +} + +/* + * A state transition function alters the global #if processing state + * in a particular way. The table below is indexed by the current + * processing state and the type of the current line. + * + * Nesting is handled by keeping a stack of states; some transition + * functions increase or decrease the depth. They also maintain the + * ignore state on a stack. In some complicated cases they have to + * alter the preprocessor directive, as follows. + * + * When we have processed a group that starts off with a known-false + * #if/#elif sequence (which has therefore been deleted) followed by a + * #elif that we don't understand and therefore must keep, we edit the + * latter into a #if to keep the nesting correct. + * + * When we find a true #elif in a group, the following block will + * always be kept and the rest of the sequence after the next #elif or + * #else will be discarded. We edit the #elif into a #else and the + * following directive to #endif since this has the desired behaviour. + * + * "Dodgy" directives are split across multiple lines, the most common + * example being a multi-line comment hanging off the right of the + * directive. We can handle them correctly only if there is no change + * from printing to dropping (or vice versa) caused by that directive. + * If the directive is the first of a group we have a choice between + * failing with an error, or passing it through unchanged instead of + * evaluating it. The latter is not the default to avoid questions from + * users about unifdef unexpectedly leaving behind preprocessor directives. + */ +typedef void state_fn(void); + +/* report an error */ +__dead static void Eelif (void) { error("Inappropriate #elif"); } +__dead static void Eelse (void) { error("Inappropriate #else"); } +__dead static void Eendif(void) { error("Inappropriate #endif"); } +__dead static void Eeof (void) { error("Premature EOF"); } +__dead static void Eioccc(void) { error("Obfuscated preprocessor control line"); } +/* plain line handling */ +static void print (void) { flushline(true); } +static void drop (void) { flushline(false); } +/* output lacks group's start line */ +static void Strue (void) { drop(); ignoreoff(); state(IS_TRUE_PREFIX); } +static void Sfalse(void) { drop(); ignoreoff(); state(IS_FALSE_PREFIX); } +static void Selse (void) { drop(); state(IS_TRUE_ELSE); } +/* print/pass this block */ +static void Pelif (void) { print(); ignoreoff(); state(IS_PASS_MIDDLE); } +static void Pelse (void) { print(); state(IS_PASS_ELSE); } +static void Pendif(void) { print(); --depth; } +/* discard this block */ +static void Dfalse(void) { drop(); ignoreoff(); state(IS_FALSE_TRAILER); } +static void Delif (void) { drop(); ignoreoff(); state(IS_FALSE_MIDDLE); } +static void Delse (void) { drop(); state(IS_FALSE_ELSE); } +static void Dendif(void) { drop(); --depth; } +/* first line of group */ +static void Fdrop (void) { nest(); Dfalse(); } +static void Fpass (void) { nest(); Pelif(); } +static void Ftrue (void) { nest(); Strue(); } +static void Ffalse(void) { nest(); Sfalse(); } +/* variable pedantry for obfuscated lines */ +static void Oiffy (void) { if (iocccok) Fpass(); else Eioccc(); ignoreon(); } +static void Oif (void) { if (iocccok) Fpass(); else Eioccc(); } +static void Oelif (void) { if (iocccok) Pelif(); else Eioccc(); } +/* ignore comments in this block */ +static void Idrop (void) { Fdrop(); ignoreon(); } +static void Itrue (void) { Ftrue(); ignoreon(); } +static void Ifalse(void) { Ffalse(); ignoreon(); } +/* edit this line */ +static void Mpass (void) { strncpy(keyword, "if ", 4); Pelif(); } +static void Mtrue (void) { keywordedit("else\n"); state(IS_TRUE_MIDDLE); } +static void Melif (void) { keywordedit("endif\n"); state(IS_FALSE_TRAILER); } +static void Melse (void) { keywordedit("endif\n"); state(IS_FALSE_ELSE); } + +static state_fn * const trans_table[IS_COUNT][LT_COUNT] = { +/* IS_OUTSIDE */ +{ Itrue, Ifalse,Fpass, Ftrue, Ffalse,Eelif, Eelif, Eelif, Eelse, Eendif, + Oiffy, Oiffy, Fpass, Oif, Oif, Eelif, Eelif, Eelif, Eelse, Eendif, + print, done }, +/* IS_FALSE_PREFIX */ +{ Idrop, Idrop, Fdrop, Fdrop, Fdrop, Mpass, Strue, Sfalse,Selse, Dendif, + Idrop, Idrop, Fdrop, Fdrop, Fdrop, Mpass, Eioccc,Eioccc,Eioccc,Eioccc, + drop, Eeof }, +/* IS_TRUE_PREFIX */ +{ Itrue, Ifalse,Fpass, Ftrue, Ffalse,Dfalse,Dfalse,Dfalse,Delse, Dendif, + Oiffy, Oiffy, Fpass, Oif, Oif, Eioccc,Eioccc,Eioccc,Eioccc,Eioccc, + print, Eeof }, +/* IS_PASS_MIDDLE */ +{ Itrue, Ifalse,Fpass, Ftrue, Ffalse,Pelif, Mtrue, Delif, Pelse, Pendif, + Oiffy, Oiffy, Fpass, Oif, Oif, Pelif, Oelif, Oelif, Pelse, Pendif, + print, Eeof }, +/* IS_FALSE_MIDDLE */ +{ Idrop, Idrop, Fdrop, Fdrop, Fdrop, Pelif, Mtrue, Delif, Pelse, Pendif, + Idrop, Idrop, Fdrop, Fdrop, Fdrop, Eioccc,Eioccc,Eioccc,Eioccc,Eioccc, + drop, Eeof }, +/* IS_TRUE_MIDDLE */ +{ Itrue, Ifalse,Fpass, Ftrue, Ffalse,Melif, Melif, Melif, Melse, Pendif, + Oiffy, Oiffy, Fpass, Oif, Oif, Eioccc,Eioccc,Eioccc,Eioccc,Pendif, + print, Eeof }, +/* IS_PASS_ELSE */ +{ Itrue, Ifalse,Fpass, Ftrue, Ffalse,Eelif, Eelif, Eelif, Eelse, Pendif, + Oiffy, Oiffy, Fpass, Oif, Oif, Eelif, Eelif, Eelif, Eelse, Pendif, + print, Eeof }, +/* IS_FALSE_ELSE */ +{ Idrop, Idrop, Fdrop, Fdrop, Fdrop, Eelif, Eelif, Eelif, Eelse, Dendif, + Idrop, Idrop, Fdrop, Fdrop, Fdrop, Eelif, Eelif, Eelif, Eelse, Eioccc, + drop, Eeof }, +/* IS_TRUE_ELSE */ +{ Itrue, Ifalse,Fpass, Ftrue, Ffalse,Eelif, Eelif, Eelif, Eelse, Dendif, + Oiffy, Oiffy, Fpass, Oif, Oif, Eelif, Eelif, Eelif, Eelse, Eioccc, + print, Eeof }, +/* IS_FALSE_TRAILER */ +{ Idrop, Idrop, Fdrop, Fdrop, Fdrop, Dfalse,Dfalse,Dfalse,Delse, Dendif, + Idrop, Idrop, Fdrop, Fdrop, Fdrop, Dfalse,Dfalse,Dfalse,Delse, Eioccc, + drop, Eeof } +/*TRUEI FALSEI IF TRUE FALSE ELIF ELTRUE ELFALSE ELSE ENDIF + TRUEI FALSEI IF TRUE FALSE ELIF ELTRUE ELFALSE ELSE ENDIF (DODGY) + PLAIN EOF */ +}; + +/* + * State machine utility functions + */ +static void +done(void) +{ + if (incomment) + error("EOF in comment"); + if (fclose(output)) { + if (overwriting) { + unlink(tmpname); + errx(2, "%s unchanged", ofilename); + } + } + if (overwriting && rename(tmpname, ofilename)) { + unlink(tmpname); + errx(2, "%s unchanged", ofilename); + } + exit(exitstat); +} +static void +ignoreoff(void) +{ + ignoring[depth] = ignoring[depth-1]; +} +static void +ignoreon(void) +{ + ignoring[depth] = true; +} +static void +keywordedit(const char *replacement) +{ + strlcpy(keyword, replacement, tline + sizeof(tline) - keyword); + print(); +} +static void +nest(void) +{ + depth += 1; + if (depth >= MAXDEPTH) + error("Too many levels of nesting"); + stifline[depth] = linenum; +} +static void +state(Ifstate is) +{ + ifstate[depth] = is; +} + +/* + * Write a line to the output or not, according to command line options. + */ +static void +flushline(bool keep) +{ + if (symlist) + return; + if (keep ^ complement) + fputs(tline, output); + else { + if (lnblank) + putc('\n', output); + exitstat = 1; + } +} + +/* + * The driver for the state machine. + */ +static void +process(void) +{ + Linetype lineval; + + for (;;) { + linenum++; + lineval = get_line(); + trans_table[ifstate[depth]][lineval](); + debug("process %s -> %s depth %d", + linetype_name[lineval], + ifstate_name[ifstate[depth]], depth); + } +} + +/* + * Parse a line and determine its type. We keep the preprocessor line + * parser state between calls in the global variable linestate, with + * help from skipcomment(). + */ +static Linetype +get_line(void) +{ + const char *cp; + int cursym; + int kwlen; + Linetype retval; + Comment_state wascomment; + + if (fgets(tline, MAXLINE, input) == NULL) + return (LT_EOF); + retval = LT_PLAIN; + wascomment = incomment; + cp = skipcomment(tline); + if (linestate == LS_START) { + if (*cp == '#') { + linestate = LS_HASH; + cp = skipcomment(cp + 1); + } else if (*cp != '\0') + linestate = LS_DIRTY; + } + if (!incomment && linestate == LS_HASH) { + keyword = tline + (cp - tline); + cp = skipsym(cp); + kwlen = cp - keyword; + /* no way can we deal with a continuation inside a keyword */ + if (strncmp(cp, "\\\n", 2) == 0) + Eioccc(); + if (strlcmp("ifdef", keyword, kwlen) == 0 || + strlcmp("ifndef", keyword, kwlen) == 0) { + cp = skipcomment(cp); + if ((cursym = findsym(cp)) < 0) + retval = LT_IF; + else { + retval = (keyword[2] == 'n') + ? LT_FALSE : LT_TRUE; + if (value[cursym] == NULL) + retval = (retval == LT_TRUE) + ? LT_FALSE : LT_TRUE; + if (ignore[cursym]) + retval = (retval == LT_TRUE) + ? LT_TRUEI : LT_FALSEI; + } + cp = skipsym(cp); + } else if (strlcmp("if", keyword, kwlen) == 0) + retval = ifeval(&cp); + else if (strlcmp("elif", keyword, kwlen) == 0) + retval = ifeval(&cp) - LT_IF + LT_ELIF; + else if (strlcmp("else", keyword, kwlen) == 0) + retval = LT_ELSE; + else if (strlcmp("endif", keyword, kwlen) == 0) + retval = LT_ENDIF; + else { + linestate = LS_DIRTY; + retval = LT_PLAIN; + } + cp = skipcomment(cp); + if (*cp != '\0') { + linestate = LS_DIRTY; + if (retval == LT_TRUE || retval == LT_FALSE || + retval == LT_TRUEI || retval == LT_FALSEI) + retval = LT_IF; + if (retval == LT_ELTRUE || retval == LT_ELFALSE) + retval = LT_ELIF; + } + if (retval != LT_PLAIN && (wascomment || incomment)) { + retval += LT_DODGY; + if (incomment) + linestate = LS_DIRTY; + } + } + if (linestate == LS_DIRTY) { + while (*cp != '\0') + cp = skipcomment(cp + 1); + } + debug("parser %s comment %s line", + comment_name[incomment], linestate_name[linestate]); + return (retval); +} + +/* + * These are the binary operators that are supported by the expression + * evaluator. Note that if support for division is added then we also + * need short-circuiting booleans because of divide-by-zero. + */ +static int op_lt(int a, int b) { return (a < b); } +static int op_gt(int a, int b) { return (a > b); } +static int op_le(int a, int b) { return (a <= b); } +static int op_ge(int a, int b) { return (a >= b); } +static int op_eq(int a, int b) { return (a == b); } +static int op_ne(int a, int b) { return (a != b); } +static int op_or(int a, int b) { return (a || b); } +static int op_and(int a, int b) { return (a && b); } + +/* + * An evaluation function takes three arguments, as follows: (1) a pointer to + * an element of the precedence table which lists the operators at the current + * level of precedence; (2) a pointer to an integer which will receive the + * value of the expression; and (3) a pointer to a char* that points to the + * expression to be evaluated and that is updated to the end of the expression + * when evaluation is complete. The function returns LT_FALSE if the value of + * the expression is zero, LT_TRUE if it is non-zero, or LT_IF if the + * expression could not be evaluated. + */ +struct ops; + +typedef Linetype eval_fn(const struct ops *, int *, const char **); + +static eval_fn eval_table, eval_unary; + +/* + * The precedence table. Expressions involving binary operators are evaluated + * in a table-driven way by eval_table. When it evaluates a subexpression it + * calls the inner function with its first argument pointing to the next + * element of the table. Innermost expressions have special non-table-driven + * handling. + */ +static const struct ops { + eval_fn *inner; + struct op { + const char *str; + int (*fn)(int, int); + } op[5]; +} eval_ops[] = { + { eval_table, { { "||", op_or } } }, + { eval_table, { { "&&", op_and } } }, + { eval_table, { { "==", op_eq }, + { "!=", op_ne } } }, + { eval_unary, { { "<=", op_le }, + { ">=", op_ge }, + { "<", op_lt }, + { ">", op_gt } } } +}; + +/* + * Function for evaluating the innermost parts of expressions, + * viz. !expr (expr) defined(symbol) symbol number + * We reset the keepthis flag when we find a non-constant subexpression. + */ +static Linetype +eval_unary(const struct ops *ops, int *valp, const char **cpp) +{ + const char *cp; + char *ep; + int sym; + + cp = skipcomment(*cpp); + if (*cp == '!') { + debug("eval%td !", ops - eval_ops); + cp++; + if (eval_unary(ops, valp, &cp) == LT_IF) + return (LT_IF); + *valp = !*valp; + } else if (*cp == '(') { + cp++; + debug("eval%td (", ops - eval_ops); + if (eval_table(eval_ops, valp, &cp) == LT_IF) + return (LT_IF); + cp = skipcomment(cp); + if (*cp++ != ')') + return (LT_IF); + } else if (isdigit((unsigned char)*cp)) { + debug("eval%td number", ops - eval_ops); + *valp = strtol(cp, &ep, 0); + cp = skipsym(cp); + } else if (strncmp(cp, "defined", 7) == 0 && endsym(cp[7])) { + cp = skipcomment(cp+7); + debug("eval%td defined", ops - eval_ops); + if (*cp++ != '(') + return (LT_IF); + cp = skipcomment(cp); + sym = findsym(cp); + if (sym < 0 || symlist) + return (LT_IF); + *valp = (value[sym] != NULL); + cp = skipsym(cp); + cp = skipcomment(cp); + if (*cp++ != ')') + return (LT_IF); + keepthis = false; + } else if (!endsym(*cp)) { + debug("eval%td symbol", ops - eval_ops); + sym = findsym(cp); + if (sym < 0 || symlist) + return (LT_IF); + if (value[sym] == NULL) + *valp = 0; + else { + *valp = strtol(value[sym], &ep, 0); + if (*ep != '\0' || ep == value[sym]) + return (LT_IF); + } + cp = skipsym(cp); + keepthis = false; + } else { + debug("eval%td bad expr", ops - eval_ops); + return (LT_IF); + } + + *cpp = cp; + debug("eval%td = %d", ops - eval_ops, *valp); + return (*valp ? LT_TRUE : LT_FALSE); +} + +/* + * Table-driven evaluation of binary operators. + */ +static Linetype +eval_table(const struct ops *ops, int *valp, const char **cpp) +{ + const struct op *op; + const char *cp; + int val; + + debug("eval%td", ops - eval_ops); + cp = *cpp; + if (ops->inner(ops+1, valp, &cp) == LT_IF) + return (LT_IF); + for (;;) { + cp = skipcomment(cp); + for (op = ops->op; op->str != NULL; op++) + if (strncmp(cp, op->str, strlen(op->str)) == 0) + break; + if (op->str == NULL) + break; + cp += strlen(op->str); + debug("eval%td %s", ops - eval_ops, op->str); + if (ops->inner(ops+1, &val, &cp) == LT_IF) + return (LT_IF); + *valp = op->fn(*valp, val); + } + + *cpp = cp; + debug("eval%td = %d", ops - eval_ops, *valp); + return (*valp ? LT_TRUE : LT_FALSE); +} + +/* + * Evaluate the expression on a #if or #elif line. If we can work out + * the result we return LT_TRUE or LT_FALSE accordingly, otherwise we + * return just a generic LT_IF. + */ +static Linetype +ifeval(const char **cpp) +{ + int ret; + int val; + + debug("eval %s", *cpp); + keepthis = killconsts ? false : true; + ret = eval_table(eval_ops, &val, cpp); + debug("eval = %d", val); + return (keepthis ? LT_IF : ret); +} + +/* + * Skip over comments and stop at the next character position that is + * not whitespace. Between calls we keep the comment state in the + * global variable incomment, and we also adjust the global variable + * linestate when we see a newline. + * XXX: doesn't cope with the buffer splitting inside a state transition. + */ +static const char * +skipcomment(const char *cp) +{ + if (text || ignoring[depth]) { + for (; isspace((unsigned char)*cp); cp++) + if (*cp == '\n') + linestate = LS_START; + return (cp); + } + while (*cp != '\0') + /* don't reset to LS_START after a line continuation */ + if (strncmp(cp, "\\\n", 2) == 0) + cp += 2; + else switch (incomment) { + case NO_COMMENT: + if (strncmp(cp, "/\\\n", 3) == 0) { + incomment = STARTING_COMMENT; + cp += 3; + } else if (strncmp(cp, "/*", 2) == 0) { + incomment = C_COMMENT; + cp += 2; + } else if (strncmp(cp, "//", 2) == 0) { + incomment = CXX_COMMENT; + cp += 2; + } else if (strncmp(cp, "\n", 1) == 0) { + linestate = LS_START; + cp += 1; + } else if (strchr(" \t", *cp) != NULL) { + cp += 1; + } else + return (cp); + continue; + case CXX_COMMENT: + if (strncmp(cp, "\n", 1) == 0) { + incomment = NO_COMMENT; + linestate = LS_START; + } + cp += 1; + continue; + case C_COMMENT: + if (strncmp(cp, "*\\\n", 3) == 0) { + incomment = FINISHING_COMMENT; + cp += 3; + } else if (strncmp(cp, "*/", 2) == 0) { + incomment = NO_COMMENT; + cp += 2; + } else + cp += 1; + continue; + case STARTING_COMMENT: + if (*cp == '*') { + incomment = C_COMMENT; + cp += 1; + } else if (*cp == '/') { + incomment = CXX_COMMENT; + cp += 1; + } else { + incomment = NO_COMMENT; + linestate = LS_DIRTY; + } + continue; + case FINISHING_COMMENT: + if (*cp == '/') { + incomment = NO_COMMENT; + cp += 1; + } else + incomment = C_COMMENT; + continue; + default: + abort(); /* bug */ + } + return (cp); +} + +/* + * Skip over an identifier. + */ +static const char * +skipsym(const char *cp) +{ + while (!endsym(*cp)) + ++cp; + return (cp); +} + +/* + * Look for the symbol in the symbol table. If it is found, we return + * the symbol table index, else we return -1. + */ +static int +findsym(const char *str) +{ + const char *cp; + int symind; + + cp = skipsym(str); + if (cp == str) + return (-1); + if (symlist) + printf("%.*s\n", (int)(cp-str), str); + for (symind = 0; symind < nsyms; ++symind) { + if (strlcmp(symname[symind], str, cp-str) == 0) { + debug("findsym %s %s", symname[symind], + value[symind] ? value[symind] : ""); + return (symind); + } + } + return (-1); +} + +/* + * Add a symbol to the symbol table. + */ +static void +addsym(bool ignorethis, bool definethis, char *sym) +{ + int symind; + char *val; + + symind = findsym(sym); + if (symind < 0) { + if (nsyms >= MAXSYMS) + errx(2, "too many symbols"); + symind = nsyms++; + } + symname[symind] = sym; + ignore[symind] = ignorethis; + val = sym + (skipsym(sym) - sym); + if (definethis) { + if (*val == '=') { + value[symind] = val+1; + *val = '\0'; + } else if (*val == '\0') + value[symind] = ""; + else + usage(); + } else { + if (*val != '\0') + usage(); + value[symind] = NULL; + } +} + +/* + * Compare s with n characters of t. + * The same as strncmp() except that it checks that s[n] == '\0'. + */ +static int +strlcmp(const char *s, const char *t, size_t n) +{ + while (n-- && *t != '\0') + if (*s != *t) + return ((unsigned char)*s - (unsigned char)*t); + else + ++s, ++t; + return ((unsigned char)*s); +} + +/* + * Diagnostics. + */ +static void +debug(const char *msg, ...) +{ + va_list ap; + + if (debugging) { + va_start(ap, msg); + vwarnx(msg, ap); + va_end(ap); + } +} + +static void +error(const char *msg) +{ + if (depth == 0) + warnx("%s: %d: %s", filename, linenum, msg); + else + warnx("%s: %d: %s (#if line %d depth %d)", + filename, linenum, msg, stifline[depth], depth); + fclose(output); + if (overwriting) { + unlink(tmpname); + errx(2, "%s unchanged", ofilename); + } + errx(2, "output may be truncated"); +} diff --git a/usr.bin/unifdef/unifdefall.sh b/usr.bin/unifdef/unifdefall.sh new file mode 100644 index 000000000..7c1d64345 --- /dev/null +++ b/usr.bin/unifdef/unifdefall.sh @@ -0,0 +1,29 @@ +#!/bin/sh +# +# remove all the #if's from a source file +# +# $dotat: things/unifdefall.sh,v 1.10 2002/09/24 19:52:11 fanf2 Exp $ +# $FreeBSD: src/usr.bin/unifdef/unifdefall.sh,v 1.2 2002/09/24 19:50:03 fanf Exp $ + +set -e + +basename=`basename $0` +tmp=`mktemp -d -t $basename` || exit 2 + +unifdef -s "$@" | sort | uniq > $tmp/ctrl +cpp -dM "$@" | sort | + sed -Ee 's/^#define[ ]+(.*[^ ])[ ]*$/\1/' > $tmp/hashdefs +sed -Ee 's/^([A-Za-z0-9_]+).*$/\1/' $tmp/hashdefs > $tmp/alldef +comm -23 $tmp/ctrl $tmp/alldef > $tmp/undef +comm -12 $tmp/ctrl $tmp/alldef > $tmp/def + +echo unifdef -k \\ > $tmp/cmd +sed -Ee 's/^(.*)$/-U\1 \\/' $tmp/undef >> $tmp/cmd +while read sym +do sed -Ee '/^('"$sym"')([(][^)]*[)])?([ ]+(.*))?$/!d;s//-D\1=\4/' $tmp/hashdefs +done < $tmp/def | + sed -Ee 's/\\/\\\\/g;s/"/\\"/g;s/^/"/;s/$/" \\/' >> $tmp/cmd +echo '"$@"' >> $tmp/cmd +sh $tmp/cmd "$@" + +rm -r $tmp