From: Ben Gras Date: Sat, 26 Jun 2010 01:41:19 +0000 (+0000) Subject: commands: less is more. X-Git-Tag: v3.1.8~348 X-Git-Url: http://zhaoyanbai.com/repos/doc/mandoc_char.7.html?a=commitdiff_plain;h=74c06cfc43b830a23fcef471f6bba4f578fc6e01;p=minix.git commands: less is more. --- diff --git a/commands/Makefile b/commands/Makefile index 45a5528a2..4efa39f08 100644 --- a/commands/Makefile +++ b/commands/Makefile @@ -15,7 +15,7 @@ SUBDIR= aal add_route adduser advent arp ash at autil awk \ fsck1 ftp101 ftpd200 getty grep gomoku head host \ hostaddr id ifconfig ifdef indent install \ intr ipcrm ipcs irdpd isoread join kill last leave \ - lex life loadkeys loadramdisk logger login look lp \ + less lex life loadkeys loadramdisk logger login look lp \ lpd ls lspci M m4 mail make MAKEDEV man \ mdb mesg mined mkdep mkdir mkdist mkfifo mkfs mknod \ mkproto modem mount mt netconf newroot nice nm nohup \ diff --git a/commands/less/Makefile b/commands/less/Makefile new file mode 100644 index 000000000..9999a1c1f --- /dev/null +++ b/commands/less/Makefile @@ -0,0 +1,5 @@ +# $NetBSD: Makefile,v 1.2 1999/03/24 09:15:20 mrg Exp $ + +SUBDIR=less lesskey lessecho + +.include diff --git a/commands/less/Makefile.inc b/commands/less/Makefile.inc new file mode 100644 index 000000000..4c8b4eae4 --- /dev/null +++ b/commands/less/Makefile.inc @@ -0,0 +1,7 @@ +# $NetBSD: Makefile.inc,v 1.3 2001/07/26 14:20:47 mrg Exp $ + +.if exists(${.CURDIR}/../../Makefile.inc) +.include "${.CURDIR}/../../Makefile.inc" +.endif + +CWARNFLAGS+= -Wno-strict-prototypes -Wno-missing-prototypes diff --git a/commands/less/less/INSTALL b/commands/less/less/INSTALL new file mode 100644 index 000000000..c2ab230e4 --- /dev/null +++ b/commands/less/less/INSTALL @@ -0,0 +1,186 @@ + This file describes how to build and install less using +the "configure" script. This only works on Unix systems. +To install on other systems, read the README file. + + +Basic Installation +================== + + These are generic installation instructions. + + The `configure' shell script attempts to guess correct values for +various system-dependent variables used during compilation. It uses +those values to create a `Makefile' in each directory of the package. +It may also create one or more `.h' files containing system-dependent +definitions. Finally, it creates a shell script `config.status' that +you can run in the future to recreate the current configuration, a file +`config.cache' that saves the results of its tests to speed up +reconfiguring, and a file `config.log' containing compiler output +(useful mainly for debugging `configure'). + + If you need to do unusual things to compile the package, please try +to figure out how `configure' could check whether to do them, and mail +diffs or instructions to the address given in the `README' so they can +be considered for the next release. If at some point `config.cache' +contains results you don't want to keep, you may remove or edit it. + + The file `configure.in' is used to create `configure' by a program +called `autoconf'. You only need `configure.in' if you want to change +it or regenerate `configure' using a newer version of `autoconf'. + +The simplest way to compile this package is: + + 1. `cd' to the directory containing the package's source code and type + `./configure' to configure the package for your system. 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. + + Running `configure' takes awhile. While running, it prints some + messages telling which features it is checking for. + + 2. Type `make' to compile the package. + + 3. Optionally, type `make check' to run any self-tests that come with + the package. + + 4. Type `make install' to install the programs and any data files and + documentation. + + 5. You can remove the program binaries and object files from the + source code directory by typing `make clean'. To also remove the + files that `configure' created (so you can compile the package for + a different kind of computer), type `make distclean'. There is + also a `make maintainer-clean' target, but that is intended mainly + for the package's developers. If you use it, you may have to get + all sorts of other programs in order to regenerate files that came + with the distribution. + +Compilers and Options +===================== + + Some systems require unusual options for compilation or linking that +the `configure' script does not know about. You can give `configure' +initial values for variables by setting them in the environment. Using +a Bourne-compatible shell, you can do that on the command line like +this: + CC=c89 CFLAGS=-O2 LIBS=-lposix ./configure + +Or on systems that have the `env' program, you can do it like this: + env CPPFLAGS=-I/usr/local/include LDFLAGS=-s ./configure + +Compiling For Multiple Architectures +==================================== + + You can compile the package for more than one kind of computer at the +same time, by placing the object files for each architecture in their +own directory. To do this, 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 +the `configure' script. `configure' automatically checks for the +source code in the directory that `configure' is in and in `..'. + + If you have to use a `make' that does not supports the `VPATH' +variable, you have to compile the package for one architecture at a time +in the source code directory. After you have installed the package for +one architecture, use `make distclean' before reconfiguring for another +architecture. + +Installation Names +================== + + By default, `make install' will install the package's files in +`/usr/local/bin', `/usr/local/man', etc. You can specify an +installation prefix other than `/usr/local' by giving `configure' the +option `--prefix=PATH'. + + You can specify separate installation prefixes for +architecture-specific files and architecture-independent files. If you +give `configure' the option `--exec-prefix=PATH', the package will use +PATH as the prefix for installing programs and libraries. +Documentation and other data files will still use the regular prefix. + + In addition, if you use an unusual directory layout you can give +options like `--bindir=PATH' to specify different values for particular +kinds of files. Run `configure --help' for a list of the directories +you can set and what kinds of files go in them. + + If the package supports it, you can cause programs to be installed +with an extra prefix or suffix on their names by giving `configure' the +option `--program-prefix=PREFIX' or `--program-suffix=SUFFIX'. + +Optional Features +================= + + Some packages pay attention to `--enable-FEATURE' options to +`configure', where FEATURE indicates an optional part of the package. +They may also pay attention to `--with-PACKAGE' options, where PACKAGE +is something like `gnu-as' or `x' (for the X Window System). The +`README' should mention any `--enable-' and `--with-' options that the +package recognizes. + + For packages that use the X Window System, `configure' can usually +find the X include and library files automatically, but if it doesn't, +you can use the `configure' options `--x-includes=DIR' and +`--x-libraries=DIR' to specify their locations. + +Specifying the System Type +========================== + + There may be some features `configure' can not figure out +automatically, but needs to determine by the type of host the package +will run on. Usually `configure' can figure that out, but if it prints +a message saying it can not guess the host type, give it the +`--host=TYPE' option. TYPE can either be a short name for the system +type, such as `sun4', or a canonical name with three fields: + CPU-COMPANY-SYSTEM + +See the file `config.sub' for the possible values of each field. If +`config.sub' isn't included in this package, then this package doesn't +need to know the host type. + + If you are building compiler tools for cross-compiling, you can also +use the `--target=TYPE' option to select the type of system they will +produce code for and the `--build=TYPE' option to select the type of +system on which you are compiling the package. + +Sharing Defaults +================ + + If you want to set default values for `configure' scripts to share, +you can create a site shell script called `config.site' that gives +default values for variables like `CC', `cache_file', and `prefix'. +`configure' looks for `PREFIX/share/config.site' if it exists, then +`PREFIX/etc/config.site' if it exists. Or, you can set the +`CONFIG_SITE' environment variable to the location of the site script. +A warning: not all `configure' scripts look for a site script. + +Operation Controls +================== + + `configure' recognizes the following options to control how it +operates. + +`--cache-file=FILE' + Use and save the results of the tests in FILE instead of + `./config.cache'. Set FILE to `/dev/null' to disable caching, for + debugging `configure'. + +`--help' + Print a summary of the options to `configure', and exit. + +`--quiet' +`--silent' +`-q' + Do not print messages saying which checks are being made. + +`--srcdir=DIR' + Look for the package's source code in directory DIR. Usually + `configure' can determine that directory automatically. + +`--version' + Print the version of Autoconf used to generate the `configure' + script, and exit. + +`configure' also accepts some other, not widely useful, options. + diff --git a/commands/less/less/LICENSE b/commands/less/less/LICENSE new file mode 100644 index 000000000..7e4887bcd --- /dev/null +++ b/commands/less/less/LICENSE @@ -0,0 +1,27 @@ + Less License + ------------ + +Less +Copyright (C) 1984-2005 Mark Nudelman + +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 in the documentation and/or other materials provided with + the distribution. + +THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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. + diff --git a/commands/less/less/Makefile b/commands/less/less/Makefile new file mode 100644 index 000000000..3add3cf5d --- /dev/null +++ b/commands/less/less/Makefile @@ -0,0 +1,20 @@ +# $NetBSD: Makefile,v 1.11 2006/11/20 22:06:26 dsl Exp $ +# from: @(#)Makefile 5.6 (Berkeley) 3/12/91 + +.ifdef SMALLPROG +CPPFLAGS+=-DSMALL +.endif + +PROG= less +CPPFLAGS+=-I${.CURDIR} -I${.CURDIR}/../lesskey -DSYSDIR=\"/etc\" +SRCS= brac.c ch.c charset.c cmdbuf.c command.c decode.c edit.c \ + filename.c forwback.c help.c ifile.c input.c jump.c line.c \ + linenum.c lsystem.c main.c mark.c optfunc.c option.c opttbl.c \ + os.c output.c position.c prompt.c screen.c search.c signal.c \ + tags.c ttyin.c version.c +#LDADD+= -ltermcap +DPADD+= ${LIBTERM} +MLINKS= less.1 more.1 less.1 page.1 +LINKS= ${BINDIR}/less ${BINDIR}/more ${BINDIR}/less ${BINDIR}/page + +.include diff --git a/commands/less/less/NEWS b/commands/less/less/NEWS new file mode 100644 index 000000000..4a532f472 --- /dev/null +++ b/commands/less/less/NEWS @@ -0,0 +1,634 @@ + + NEWS about less + +====================================================================== + + For the latest news about less, see the "less" Web page: + http://www.greenwoodsoftware.com/less + You can also download the latest version of less from there. + + To report bugs, suggestions or comments, send email to bug-less@gnu.org. + +====================================================================== + + + Major changes between "less" versions 382 and 394 + +* Add history file to save search and shell command history between + invocations of less. + +* Improve behavior of history list for search and shell commands. + +* Add -K (or --quit-on-intr) option to make less exit immediately on ctrl-C. + +* Improve handling of UTF-8 files and commands, including better + line wrapping and handling double-width chars. + +* Added LESSUTFBINFMT environment variable to control display of + non-printable characters in a UTF-8 file. + +* Add --with-secure option to configure, to make it easier to + build a secure version of less. + +* Show search matches in the status column even if search highlights + are disabled via the -G option or the ESC-u command. + +* Improve performance when the file contains very long lines. + +* Add "windows" charset. + +* Add man page for lessecho. + +* Add support for erase2 character, treated same as erase. + +* Use ASCII lowercase/uppercase logic when operating on the command line. + +* Update makefile for Borland C++ 5.5.1. + +* Fix bug in calculating number of pages for %D prompt. + +* Fix bug in handling tag file error. + +* Fix obscure bug if input file is deleted while viewing help. + +* Fix bug handling filenames which include square brackets. + +* Fix possible buffer overflow in "global" tag search. + +* Fix possible buffer overflow in usage of LESSOPEN and LESSCLOSE. + +* Fix buffer overflow in reverse search. + +====================================================================== + + Major changes between "less" versions 381 and 382 + +* Removed some old copyrighted code. + This probably breaks OS/9 support. + +====================================================================== + + Major changes between "less" versions 378 and 381 + +* New -L option to disable LESSOPEN processing. + +* Further support for large (64 bit) file addressing. + Large file support is now set up by the configure script. + +* Use autoconf 2.54. + Replace configure.in, acconfig.h, defines.h.top with configure.ac. + +* Overstriking underscore with underscore is now bold or underlined + depending on context. + +* Use only 7 spaces for line numbers in -N mode, if possible. + +* Fix some bugs in handling overstriking in UTF-8 files. + +* Fix some nroff issues in the man page. + +====================================================================== + + Major changes between "less" versions 376 and 378 + +* Bug fixes: + Default buffer space is now 64K as documented. + Search highlighting works properly when used with -R. + Windows version works properly when input file contains carriage returns. + Clean up some compiler warnings. + +====================================================================== + + Major changes between "less" versions 358 and 376 + +* -x option can now specify multiple variable-width tab stops. + +* -X option no longer disables keypad initialization. + New option --no-keypad disables keypad initialization. + +* New commands t and T step through multiple tag matches. + Added support for "global(1)" tags + (see http://www.gnu.org/software/global/global.html). + +* New prompt style set by option -Pw defines the message printed + while waiting for data in the F command. + +* System-wide lesskey file now defaults to sysless in etc directory + instead of .sysless in bin directory. + Use "configure --sysconfdir=..." to change it. + (For backwards compatibility, .sysless in bin is still recognized.) + +* Pressing RightArrow or LeftArrow while entering a number now shifts + the display N columns rather than editing the number itself. + +* Status column (enabled with -J) now shows search results. + +* Windows version sets window title. + +* Default LESSCHARSET for MS-DOS versions is now "dos". + +* Searching works better with ANSI (SGR) escape sequences. + ANSI color escape sequences are now supported in the MS-DOS (DJGPP) version. + +* Improved performance in reading very large pipes. + +* Eliminated some dependencies on file offets being 32 bits. + +* Fixed problems when viewing files with very long lines. + +* Fixed overstriking in UTF-8 mode, and overstriking tabs. + +* Improved horizontal shifting of text using -R option with ANSI color. + +* Improved handling of filenames containing shell metacharacters. + +* Some fixes for EBCDIC systems. + +* Some fixes for OS/2 systems. + +====================================================================== + + Major changes between "less" versions 354 and 358 + +* Add -J (--status-column) option to display a status column. + +* Add -# (--shift) option to set default horizontal shift distance. + Default horizontal shift distance is now one-half screen width. + +* Horizontal shifting does not shift line numbers if -N is in effect. + +* Horizontal shifting acts as though -S were set, to avoid confusion. + +====================================================================== + + + Major changes between "less" versions 352 and 354 + +* Allow space after numeric-valued command line options. + +* Fix problem with configuring terminal libraries on some systems. + +* Add support for PCRE regular expression library. + +* Add --with-regex option to configure to allow manually selecting + a regular expression library. + +* Fix bug compiling with SECURE = 1. + +====================================================================== + + + Major changes between "less" versions 346 and 352 + +* Enable UTF-8 if "UTF-8" appears in locale-related environment variables. + +* Add --with-editor option to configure script. + +* The -M prompt and = message now show the top and bottom line number. + +* Fix bug in running the editor on a file whose name contains quotes, etc. + +* Fix bug in horizontal scrolling of long lines. + +* Fix bug in doing :d on a file which contains marks. + +* Fix bug causing cleared lines to sometimes be filled with standout, + bold, underline, etc. on certain terminals. + +* Fixes for MS-DOS (DJGPP) version. + +====================================================================== + + + Major changes between "less" versions 340 and 346 + +* The UTF-8 character set is now supported. + +* The default character set is now latin1 rather than ascii. + +* New option -R (--RAW-CONTROL-CHARS) is like -r but handles + long (wrapped) lines correctly, as long as the input contains only + normal text and ANSI color escape sequences. + +* New option -F (--quit-if-one-screen) quits if the text fits on + the first screen. + +* The -w option now highlights the target line of a g or p command. + +* A system-wide lesskey file is supported (LESSKEY_SYSTEM). + +* New escape for prompt strings: %c is replaced by column number. + +* New escape for prompt strings: %P is replaced by percentage into + file, based on line number rather than byte offset. + +* HOME and END keys now jump to beginning of file or end of file. + +====================================================================== + + + Major changes between "less" versions 337 and 340 + +* Command line options for less may now be given in either the old + single-letter form, or a new long name form (--option-name). + See the less man page or "less --help" for the list of long option names. + +* Command line options for lesskey may now be given in a new long name + form. See the lesskey man page for the list of long option names. + +* New command -- toggles an option using the long option name. + +* New command __ queries an option using the long option name. + +* The old -- command is renamed as -!. + +* If a ^P is entered between the dash and the option letter of the - + command, the message describing the new setting is suppressed. + +* Lesskey files may now contain \k escape sequences to represent the + "special" keys (arrows, PAGE-UP/PAGE-DOWN, HOME, END, INSERT, DELETE). + +* New command :d removes the current file from the list of files. + +* New option -~ (like -w before version 335) + suppresses tildes after end-of-file. + +* Less is now released under the GNU General Public License. + +====================================================================== + + + Major changes between "less" versions 335 and 337 + +* Fixed bugs in "make install". + +====================================================================== + + + Major changes between "less" versions 332 and 335 + +* The old -w flag (suppress tildes after end-of-file) has been removed. + +* New -w flag highlights the first new line after a forward-screen. + +* New -W flag highlights the first new line after any forward movement. + +* Window resize works even if LINES and/or COLUMNS environment + variables are incorrect. + +* New percent escapes for prompt strings: + %d is replaced by the page number, and + %D is replaced by the number of pages in the file. + +* Added charsets "iso8859" and "ebcdic". + +* In Windows version, uses HOMEDRIVE and HOMEPATH if HOME is not defined. + +* Fixed some bugs causing incorrect display on DOS/Windows. + +====================================================================== + + + Major changes between "less" versions 330 and 332 + +* Filenames from the command line are entered into the command history, + so UPARROW/DOWNARROW can be used to retrieve them from the :e command. + +* Now works correctly on Windows when using a scrolling terminal + window (buffer larger than display window). + +* On Windows, now restores the console screen on exit. + Use -X to get the old behavior. + +* Fixed bug on Windows when CAPS-LOCK or NUM-LOCK is pressed. + +* Fixed bug on Windows when piping output of an interactive program. + +* Fixed bug in tags file processing when tags file has DOS-style + line terminators (CR/LF). + +* Fixed compilation problem on OS/2. + +====================================================================== + + + Major changes between "less" versions 321 and 330 + +* Now supports filenames containing spaces (in double quotes). + New option -" can be used to change the quoting characters. + +* In filename completion, a slash is appended to a directory name. + If the environment variable LESSSEPARATOR is set, the value of + that variable, rather than a slash, is appended. + +* LeftArrow and RightArrow are same as ESC-[ and ESC-]. + +* Added commands ESC-( and ESC-), same as ESC-[ and ESC-]. + +* A "quit" command defined in a lesskey file may now have an "extra" + string, which is used to return an exit code from less when it quits. + +* New environment variables LESSMETACHARS and LESSMETAESCAPE provide + more control over how less interfaces to the shell. + +* Ported to Microsoft Visual C compiler for Windows. + +* Ported to DJGPP compiler for MS-DOS. + +* Bug fixes. + +====================================================================== + + + Major changes between "less" versions 291 and 321 + +* Command line at bottom of screen now scrolls, so it can be longer + than the screen width. + +* New commands ESC-] and ESC-[ scroll the display horizontally. + +* New command ESC-SPACE scrolls forward a full screen, even if it + hits end-of-file. + +* Alternate modifiers for search commands: ^N is same as !, + ^F is same as @, and ^E is same as *. + +* New modifier for search commands: ^K means highlight the matches + currently on-screen, but don't move to the first match. + +* New modifier for search commands: ^R means don't use regular + expressions in the search. + +* Environment variable LESSKEY gives name of default lesskey file. + +* Environment variable LESSSECURE will force less to run in + "secure" mode. + +* Command line argument "--" signals that the rest of the arguments + are files (not option flags). + +* Help file (less.hlp) is no longer installed. Help text is now + embedded in the less executable itself. + +* Added -Ph to change the prompt for the help text. + Added -Ps to change the default short prompt (same as plain -P). + +* Ported to the Borland C compiler for MS-DOS. + +* Ported to Windows 95 & Windows NT. + +* Ported to OS-9. + +* Ported to GNU Hurd. + +====================================================================== + + + Major changes between "less" versions 290 and 291 + +* Less environment variables can be specified in lesskey files. + +* Fixed MS-DOS build. + +====================================================================== + + + Major changes between "less" versions 278 and 290 + +* Accepts GNU-style options "--help" and "--version". + +* OS/2 version looks for less.ini in $HOME before $INIT and $PATH. + +* Bug fixes + +====================================================================== + + + Major changes between "less" versions 252 and 278 + +* A LESSOPEN preprocessor may now pipe the converted file data to less, + rather than writing it to a temporary file. + +* Search pattern highlighting has been fixed. It now highlights + reliably, even if a string is split across two screen lines, + contains TABs, etc. + +* The -F flag (which suppress search highlighting) has been changed + to -G. A new flag, -g, changes search highlighting to highlight + only the string found by the last search command, instead of all + strings which match the last search command. + +* New flag -I acts like -i, but ignores case even if the search + pattern contains uppercase letters. + +* Less now checks for the environment variable VISUAL before EDITOR. + +* Ported to OS/2. + +====================================================================== + + + Major changes between "less" versions 237 and 252 + +* Changes in line-editing keys: + The literal key is now ^V or ^A rather than \ (backslash). + Filename completion commands (TAB and ^L) are disabled + when typing a search pattern. + +* Line-editing command keys can be redefined using lesskey. + +* Lesskey with no input file defaults to $HOME/.lesskey + rather than standard input. + +* New option -V displays version number of less. + +* New option -V displays version number of lesskey. + +* Help file less.hlp is now installed by default in /usr/local/share + rather than /usr/local/lib. + + +====================================================================== + + + Major changes between "less" versions 170 and 237 + +* By popular demand, text which matches the current search pattern + is highlighted. New -F flag disables this feature. + +* Henry Spencer's regexp.c is now included, for systems which do not + have a regular expression library. + regexp.c is Copyright (c) 1986 by University of Toronto. + +* New line-editing keys, including command history (arrow keys) and + filename completion (TAB). + +* Input preprocessor allows modification of input files (e.g. uncompress) + via LESSOPEN/LESSCLOSE environment variables. + +* New -X flag disables sending termcap "ti" and "te" (initialize and + deinitialize) strings to the terminal. + +* Changing -i from within less now correctly affects a subsequent + repeated search. + +* Searching for underlined or overstruck text now works when the -u + flag is in effect, rather than the -i flag. + +* Use setlocale (LANG and LC_CTYPE environment variables) to determine + the character set if LESSCHARSET/LESSCHARDEF are not set. + +* The default format for displaying binary characters is now standout + (reverse video) rather than blinking. This can still be changed by + setting the LESSBINFMT environment variable. + +* Use autoconf installation technology. + +* Ported to MS-DOS. + + ******************************** + Things that may surprise you + ******************************** + +* When you enter text at the bottom of the screen (search string, + filename, etc.), some keys act different than previously. + Specifically, \ (backslash), ESC, TAB, BACKTAB, and control-L + now have line editing functions. + +* Some previous unofficial versions of less were able to display + compressed files. The new LESSOPEN/LESSCLOSE feature now provides + this functionality in a different way. + +* Some previous unofficial versions of less provided a -Z flag to + set the number of lines of text to retain between full screen scrolls. + The -z-n flag (that is, -z with a negative number) provides this + functionality. + + +====================================================================== + + + Major changes between "less" versions 123 and 170 + +* New option -j allows target lines to be positioned anywhere on screen. + +* New option -S truncates displayed line at the screen width, + rather than wrapping onto the next line. + +* New option -y limits amount of forward scroll. + +* New option -T specifies a "tags" file. + +* Non-printable, non-control characters are displayed in octal. + Such characters, as well as control characters, are displayed + in blinking mode. + +* New command -+ sets an option to its default. +* New command -- sets an option to the opposite of its default. + +* Lesskey file may have a string appended to a key's action, + which acts as though typed in after the command. + +* New commands ESC-^F and ESC-^B match arbitrary types of brackets. + +* New command F monitors a growing file (like "tail -f"). + +* New command | pipes a section of the input file into a shell command. + +* New command :x directly jumps to a file in the command line list. + +* Search commands have been enhanced and reorganized: + n Repeat search, same direction. + N Repeat search, opposite direction. + ESC-/ Search forward thru file boundaries + ESC-? Search backward thru file boundaries + ESC-n Repeat search thru file boundaries, same direction. + ESC-N Repeat search thru file boundaries, opposite direction. + Special character * causes search to search thru file boundaries. + Special character @ causes search to begin at start/end of file list. + +* Examining a new file adds it to the command line list. + A list of files, or an expression which matches more than one file, + may be examined; all of them are added to the command line list. + +* Environment variables LESSCHARSET and LESSCHARDEF can define + a non-ASCII character set. + +* Partial support for MSDOS, including options -R for repainting screen + on quit, -v/-V to select video mode, and -W to change window size. + + +====================================================================== + + + Major changes between "less" versions 97 and 123 + +* New option (-N) causes line numbers to be displayed in the + text of the file (like vi "set nu"). + +* New option (-?) prints help message immediately. + +* New option (-r) displays "raw" control characters, without + mapping them to ^X notation. + +* New option (-f) forces less to open non-regular files + (directories, etc). + +* New option (-k) can be used to specify lesskey files by name. + +* New option (-y) can be used to set a forward scroll limit + (like -h sets a backward scroll limit). + +* File marks (set by the m command) are now preserved when a new + file is edited. The ' command can thus be used to switch files. + +* New command ESC-/ searches all files (on the command line) + for a pattern. + +* New command ESC-n repeats previous search, spanning files. + +* The N command has been changed to repeat the previous search + in the reverse direction. The old N command is still available + via :n. + +* New command ESC-N repeats previous search in the reverse + direction and spanning files. + +* 8 bit characters are now supported. A new option (-g) can be + used to strip off the eighth bit (the previous behavior). + +* Options which take a following string (like -t) may now + optionally have a space between the option letter and the string. + +* Six new commands { } ( ) [ and ] can be used to match + brackets of specific types, similar to vi % command. + +* New commands z and w move forward/backward one window and + simultaneously set the window size. + +* Prompt string expansion now has %L for line number of the last + line in the file, and %E for the name of the editor. + Also, % escapes which refer to a line (b=bottom, t=top, etc.) + can use j for the jump target line. + +* New environment variable LESSEDIT can be used to tailor the + command string passed to the editor by the v command. + +* Examining a file which was previously examined will return + to the same position in the file. + +* A "%" is expanded to the current filename and a "#" to the + previous filename, in both shell commands and the E command. + (Previously % worked only in shell commands and # worked + only in the E command.) + +* New command ":ta" is equivalent to "-t". + +* New command "s" is equivalent to "-l". + +* The - command may be followed by "+X" to revert to the default + for option X, or "-X" to get the opposite of the default. + +* Lesskey files may now include characters after the action as + extra input to be parsed after the action; for example: + "toggle-option X" to toggle a specific option X. diff --git a/commands/less/less/README b/commands/less/less/README new file mode 100644 index 000000000..ce014e485 --- /dev/null +++ b/commands/less/less/README @@ -0,0 +1,236 @@ + + Less, version 394 + + This is the distribution of less, version 394, released 03 Dec 2005. + This program is part of the GNU project (http://www.gnu.org). + + This program is free software. You may redistribute it and/or + modify it under the terms of either: + + 1. The GNU General Public License, as published by the Free + Software Foundation; either version 2, or (at your option) any + later version. A copy of this license is in the file COPYING. + or + 2. The Less License, in the file LICENSE. + + Please report any problems to bug-less@gnu.org or markn@greenwoodsoftware.com. + See http://www.greenwoodsoftware.com/less for the latest info. + You may also contact the author at: + Mark Nudelman + Greenwood Software + PO Box 2402 + El Granada, CA 94018 + USA + +========================================================================= + +This is the distribution of "less", a paginator similar to "more" or "pg". + +The formatted manual page is in less.man. +The manual page nroff source is in less.nro. +Major changes made since the last posted version are in NEWS. + +======================================================================= +INSTALLATION (Unix systems only): + +1. Move the distributed source to its own directory and unpack it, + if you have not already done so. + +2. Type "sh configure". + This will generate a Makefile and a defines.h. + Warning: if you have a GNU sed, make sure it is version 2.05 or later. + + The file INSTALL describes the usage of the configure program in + general. In addition, these options to configure are supported: + + --with-editor=program + Specifies the default editor program used by the "v" command. + The default is "vi". + --with-regex=lib + Specifies the regular expression library used by less for pattern + matching. The default is "auto", which means the configure program + finds a regular expression library automatically. Other values are: + posix Use the POSIX-compatible regcomp. + pcre Use the PCRE library. + regcmp Use the regcmp library. + re_comp Use the re_comp library. + regcomp Use the V8-compatible regcomp. + regcomp-local Use Henry Spencer's V8-compatible regcomp + (source is supplied with less). + --with-secure + Builds a "secure" version of less, with some features disabled + to prevent users from viewing other files, accessing shell + commands, etc. + +3. It is a good idea to look over the generated Makefile and defines.h + and make sure they look ok. If you know of any peculiarities of + your system that configure might not have detected, you may fix the + Makefile now. Take particular notice of the list of "terminal" + libraries in the LIBS definition in the Makefile; these may need + to be edited. The terminal libraries will be some subset of + -lncurses -lcurses -ltermcap -ltermlib + + If you wish, you may edit defines.h to remove some optional features. + If you choose not to include some features in your version, you may + wish to edit the manual page "less.nro" and the help page "less.hlp" + to remove the descriptions of the features which you are removing. + If you edit less.hlp, you should run "make -f Makefile.aut help.c". + +4. Type "make" and watch the fun. + +5. If the make succeeds, it will generate the programs "less", + "lesskey" and "lessecho" in your current directory. Test the + generated programs. + +6. When satisfied that it works, if you wish to install it + in a public place, type "make install". + + The default install destinations are: + Executables (less, lesskey, lessecho) in /usr/local/bin + Documentation (less.nro, lesskey.nro) in /usr/local/man/man1 + If you want to install any of these files elsewhere, define + bindir and/or mandir to the appropriate directories. + +If you have any problems building or running "less", suggestions, +complaints, etc., you may mail to the author at markn@greenwoodsoftware.com. + +Note to hackers: comments noting possible improvements are enclosed +in double curly brackets {{ like this }}. + + + +======================================================================= +INSTALLATION (MS-DOS systems only, + with Microsoft C, Borland C, or DJGPP) + +1. Move the distributed source to its own directory. + Depending on your compiler, you may need to convert the source + to have CR-LF rather than LF as line terminators. + +2. If you are using Microsoft C, rename MAKEFILE.DSU to MAKEFILE. + If you are using Borland C, rename MAKEFILE.DSB to MAKEFILE. + If you are using DJGPP, rename MAKEFILE.DSG to MAKEFILE. + +3. Look at MAKEFILE to make sure that the definitions for CC and LIBDIR + are correct. CC should be the name of your C compiler and + LIBDIR should be the directory where the C libraries reside (for + Microsoft C only). If these definitions need to be changed, you can + either modify the definitions directly in MAKEFILE, or set your + environment variables CC and/or LIBDIR to override the definitions + in MAKEFILE. + +4. If you wish, you may edit DEFINES.DS to remove some optional features. + If you choose not to include some features in your version, you may + wish to edit the manual page LESS.MAN and the help page HELP.C + to remove the descriptions of the features which you are removing. + +5. Run your "make" program and watch the fun. + If your "make" requires a flag to import environment variables, + you should use that flag. + If your compiler runs out of memory, try running "make -n >cmds.bat" + and then run cmds.bat. + +6. If the make succeeds, it will generate the programs "LESS.EXE" and + "LESSKEY.EXE" in your current directory. Test the generated programs. + +7. When satisfied that it works, you may wish to install LESS.EXE and + LESSKEY.EXE in a directory which is included in your PATH. + + + +======================================================================= +INSTALLATION (Windows-95, Windows-98 and Windows-NT systems only, + with Borland C or Microsoft Visual C++) + +1. Move the distributed source to its own directory. + +2. If you are using Borland C, rename Makefile.wnb to Makefile. + If you are using Microsoft Visual C++, rename Makefile.wnm to Makefile. + +3. Check the Makefile to make sure the definitions look ok. + +4. If you wish, you may edit defines.wn to remove some optional features. + If you choose not to include some features in your version, you may + wish to edit the manual page less.man and the help page help.c + to remove the descriptions of the features which you are removing. + +5. Type "make" and watch the fun. + +6. If the make succeeds, it will generate the programs "less.exe" and + "lesskey.exe" in your current directory. Test the generated programs. + +7. When satisfied that it works, if you wish to install it + in a public place, type "make install". + See step 6 of the Unix installation instructions for details + on how to change the default installation directories. + + + +======================================================================= +INSTALLATION (OS/2 systems only, + with EMX C) + +1. Move the distributed source to its own directory. + +2. Rename Makefile.o2e to Makefile. + +3. Check the Makefile to make sure the definitions look ok. + +4. If you wish, you may edit defines.o2 to remove some optional features. + If you choose not to include some features in your version, you may + wish to edit the manual page less.man and the help page help.c + to remove the descriptions of the features which you are removing. + +5. Type "make" and watch the fun. + +6. If the make succeeds, it will generate the programs "less.exe" and + "lesskey.exe" in your current directory. Test the generated programs. + +7. Make sure you have the emx runtime installed. You need the emx DLLs + emx.dll and emxlibcs.dll and also the termcap database, termcap.dat. + Make sure you have termcap.dat either in the default location or + somewhere in a directory listed in the PATH or INIT environment + variables. + +8. When satisfied that it works, you may wish to install less.exe, + lesskey.exe and scrsize.exe in a directory which is included in + your PATH. scrsize.exe is required only if you use a terminal + emulator such as xterm or rxvt. + + + +======================================================================= +INSTALLATION (OS-9 systems only, + with Microware C or Ultra C) + +1. Move the distributed source to its own directory. + +2. If you are using Microware C, rename Makefile.o9c to Makefile. + If you are using Ultra C, rename Makefile.o9u to Makefile. + +3. Check the Makefile to make sure the definitions look ok. + +4. If you wish, you may edit defines.o9 to remove some optional features. + If you choose not to include some features in your version, you may + wish to edit the manual page less.man and the help page help.c + to remove the descriptions of the features which you are removing. + +5. Type "dmake" and watch the fun. + The standard OS-9 "make" will probably not work. If you don't + have dmake, you can get a copy from os9archive.rtsi.com. + +6. If the make succeeds, it will generate the programs "less" and + "lesskey" in your current directory. Test the generated programs. + +7. When satisfied that it works, if you wish to install it + in a public place, type "dmake install". + See step 6 of the Unix installation instructions for details + on how to change the default installation directories. + +======================================================================= +ACKNOWLEDGMENTS: + Some versions of the less distribution are packaged using + Info-ZIP's compression utility. + Info-ZIP's software is free and can be obtained as source + code or executables from various anonymous-ftp sites, + including ftp.uu.net:/pub/archiving/zip. diff --git a/commands/less/less/brac.c b/commands/less/less/brac.c new file mode 100644 index 000000000..e8521e783 --- /dev/null +++ b/commands/less/less/brac.c @@ -0,0 +1,101 @@ +/* $NetBSD: brac.c,v 1.6 2006/10/26 01:33:08 mrg Exp $ */ + +/* + * Copyright (C) 1984-2004 Mark Nudelman + * + * You may distribute under the terms of either the GNU General Public + * License or the Less License, as specified in the README file. + * + * For more information about less, or for information on how to + * contact the author, see the README file. + */ + + +/* + * Routines to perform bracket matching functions. + */ + +#include "less.h" +#include "position.h" + +/* + * Try to match the n-th open bracket + * which appears in the top displayed line (forwdir), + * or the n-th close bracket + * which appears in the bottom displayed line (!forwdir). + * The characters which serve as "open bracket" and + * "close bracket" are given. + */ + public void +match_brac(obrac, cbrac, forwdir, n) + register int obrac; + register int cbrac; + int forwdir; + int n; +{ + register int c; + register int nest; + POSITION pos; + int (*chget) __P((void)); + + /* + * Seek to the line containing the open bracket. + * This is either the top or bottom line on the screen, + * depending on the type of bracket. + */ + pos = position((forwdir) ? TOP : BOTTOM); + if (pos == NULL_POSITION || ch_seek(pos)) + { + if (forwdir) + error("Nothing in top line", NULL_PARG); + else + error("Nothing in bottom line", NULL_PARG); + return; + } + + /* + * Look thru the line to find the open bracket to match. + */ + do + { + if ((c = ch_forw_get()) == '\n' || c == EOI) + { + if (forwdir) + error("No bracket in top line", NULL_PARG); + else + error("No bracket in bottom line", NULL_PARG); + return; + } + } while (c != obrac || --n > 0); + + /* + * Position the file just "after" the open bracket + * (in the direction in which we will be searching). + * If searching forward, we are already after the bracket. + * If searching backward, skip back over the open bracket. + */ + if (!forwdir) + (void) ch_back_get(); + + /* + * Search the file for the matching bracket. + */ + chget = (forwdir) ? ch_forw_get : ch_back_get; + nest = 0; + while ((c = (*chget)()) != EOI) + { + if (c == obrac) + nest++; + else if (c == cbrac && --nest < 0) + { + /* + * Found the matching bracket. + * If searching backward, put it on the top line. + * If searching forward, put it on the bottom line. + */ + jump_line_loc(ch_tell(), forwdir ? -1 : 1); + return; + } + } + error("No matching bracket", NULL_PARG); +} diff --git a/commands/less/less/ch.c b/commands/less/less/ch.c new file mode 100644 index 000000000..5ccad6830 --- /dev/null +++ b/commands/less/less/ch.c @@ -0,0 +1,845 @@ +/* $NetBSD: ch.c,v 1.8 2006/10/26 01:33:08 mrg Exp $ */ + +/* + * Copyright (C) 1984-2004 Mark Nudelman + * + * You may distribute under the terms of either the GNU General Public + * License or the Less License, as specified in the README file. + * + * For more information about less, or for information on how to + * contact the author, see the README file. + */ + + +/* + * Low level character input from the input file. + * We use these special purpose routines which optimize moving + * both forward and backward from the current read pointer. + */ + +#include "less.h" +#if MSDOS_COMPILER==WIN32C +#include +#include +#endif + +typedef POSITION BLOCKNUM; + +public int ignore_eoi; + +/* + * Pool of buffers holding the most recently used blocks of the input file. + * The buffer pool is kept as a doubly-linked circular list, + * in order from most- to least-recently used. + * The circular list is anchored by the file state "thisfile". + */ +#define LBUFSIZE 8192 +struct buf { + struct buf *next, *prev; + struct buf *hnext, *hprev; + BLOCKNUM block; + unsigned int datasize; + unsigned char data[LBUFSIZE]; +}; + +struct buflist { + /* -- Following members must match struct buf */ + struct buf *buf_next, *buf_prev; + struct buf *buf_hnext, *buf_hprev; +}; + +/* + * The file state is maintained in a filestate structure. + * A pointer to the filestate is kept in the ifile structure. + */ +#define BUFHASH_SIZE 64 +struct filestate { + struct buf *buf_next, *buf_prev; + struct buflist hashtbl[BUFHASH_SIZE]; + int file; + int flags; + POSITION fpos; + int nbufs; + BLOCKNUM block; + unsigned int offset; + POSITION fsize; +}; + +#define ch_bufhead thisfile->buf_next +#define ch_buftail thisfile->buf_prev +#define ch_nbufs thisfile->nbufs +#define ch_block thisfile->block +#define ch_offset thisfile->offset +#define ch_fpos thisfile->fpos +#define ch_fsize thisfile->fsize +#define ch_flags thisfile->flags +#define ch_file thisfile->file + +#define END_OF_CHAIN ((struct buf *)&thisfile->buf_next) +#define END_OF_HCHAIN(h) ((struct buf *)&thisfile->hashtbl[h]) +#define BUFHASH(blk) ((blk) & (BUFHASH_SIZE-1)) + +#define FOR_BUFS_IN_CHAIN(h,bp) \ + for (bp = thisfile->hashtbl[h].buf_hnext; \ + bp != END_OF_HCHAIN(h); bp = bp->hnext) + +#define HASH_RM(bp) \ + (bp)->hnext->hprev = (bp)->hprev; \ + (bp)->hprev->hnext = (bp)->hnext; + +#define HASH_INS(bp,h) \ + (bp)->hnext = thisfile->hashtbl[h].buf_hnext; \ + (bp)->hprev = END_OF_HCHAIN(h); \ + thisfile->hashtbl[h].buf_hnext->hprev = (bp); \ + thisfile->hashtbl[h].buf_hnext = (bp); + +static struct filestate *thisfile; +static int ch_ungotchar = -1; +static int maxbufs = -1; + +extern int autobuf; +extern int sigs; +extern int secure; +extern constant char helpdata[]; +extern constant int size_helpdata; +extern IFILE curr_ifile; +#if LOGFILE +extern int logfile; +extern char *namelogfile; +#endif + +static int ch_addbuf __P((void)); +static int buffered __P((BLOCKNUM)); +static void ch_delbufs __P((void)); + + +/* + * Get the character pointed to by the read pointer. + * ch_get() is a macro which is more efficient to call + * than fch_get (the function), in the usual case + * that the block desired is at the head of the chain. + */ +#define ch_get() ((ch_block == ch_bufhead->block && \ + ch_offset < ch_bufhead->datasize) ? \ + ch_bufhead->data[ch_offset] : fch_get()) + int +fch_get() +{ + register struct buf *bp; + register int n; + register int slept; + register int h; + POSITION pos; + POSITION len; + + slept = FALSE; + + /* + * Look for a buffer holding the desired block. + */ + h = BUFHASH(ch_block); + FOR_BUFS_IN_CHAIN(h, bp) + { + if (bp->block == ch_block) + { + if (ch_offset >= bp->datasize) + /* + * Need more data in this buffer. + */ + goto read_more; + goto found; + } + } + /* + * Block is not in a buffer. + * Take the least recently used buffer + * and read the desired block into it. + * If the LRU buffer has data in it, + * then maybe allocate a new buffer. + */ + if (ch_buftail == END_OF_CHAIN || ch_buftail->block != -1) + { + /* + * There is no empty buffer to use. + * Allocate a new buffer if: + * 1. We can't seek on this file and -b is not in effect; or + * 2. We haven't allocated the max buffers for this file yet. + */ + if ((autobuf && !(ch_flags & CH_CANSEEK)) || + (maxbufs < 0 || ch_nbufs < maxbufs)) + if (ch_addbuf()) + /* + * Allocation failed: turn off autobuf. + */ + autobuf = OPT_OFF; + } + bp = ch_buftail; + HASH_RM(bp); /* Remove from old hash chain. */ + bp->block = ch_block; + bp->datasize = 0; + HASH_INS(bp, h); /* Insert into new hash chain. */ + + read_more: + pos = (ch_block * LBUFSIZE) + bp->datasize; + if ((len = ch_length()) != NULL_POSITION && pos >= len) + /* + * At end of file. + */ + return (EOI); + + if (pos != ch_fpos) + { + /* + * Not at the correct position: must seek. + * If input is a pipe, we're in trouble (can't seek on a pipe). + * Some data has been lost: just return "?". + */ + if (!(ch_flags & CH_CANSEEK)) + return ('?'); + if (lseek(ch_file, (off_t)pos, 0) == BAD_LSEEK) + { + error("seek error", NULL_PARG); + clear_eol(); + return (EOI); + } + ch_fpos = pos; + } + + /* + * Read the block. + * If we read less than a full block, that's ok. + * We use partial block and pick up the rest next time. + */ + if (ch_ungotchar != -1) + { + bp->data[bp->datasize] = ch_ungotchar; + n = 1; + ch_ungotchar = -1; + } else if (ch_flags & CH_HELPFILE) + { + bp->data[bp->datasize] = helpdata[ch_fpos]; + n = 1; + } else + { + n = iread(ch_file, &bp->data[bp->datasize], + (unsigned int)(LBUFSIZE - bp->datasize)); + } + + if (n == READ_INTR) + return (EOI); + if (n < 0) + { +#if MSDOS_COMPILER==WIN32C + if (errno != EPIPE) +#endif + { + error("read error", NULL_PARG); + clear_eol(); + } + n = 0; + } + +#if LOGFILE + /* + * If we have a log file, write the new data to it. + */ + if (!secure && logfile >= 0 && n > 0) + write(logfile, (char *) &bp->data[bp->datasize], n); +#endif + + ch_fpos += n; + bp->datasize += n; + + /* + * If we have read to end of file, set ch_fsize to indicate + * the position of the end of file. + */ + if (n == 0) + { + ch_fsize = pos; + if (ignore_eoi) + { + /* + * We are ignoring EOF. + * Wait a while, then try again. + */ + if (!slept) + { + PARG parg; + parg.p_string = wait_message(); + ierror("%s", &parg); + } +#if !MSDOS_COMPILER + sleep(1); +#else +#if MSDOS_COMPILER==WIN32C + Sleep(1000); +#endif +#endif + slept = TRUE; + } + if (sigs) + return (EOI); + } + + found: + if (ch_bufhead != bp) + { + /* + * Move the buffer to the head of the buffer chain. + * This orders the buffer chain, most- to least-recently used. + */ + bp->next->prev = bp->prev; + bp->prev->next = bp->next; + bp->next = ch_bufhead; + bp->prev = END_OF_CHAIN; + ch_bufhead->prev = bp; + ch_bufhead = bp; + + /* + * Move to head of hash chain too. + */ + HASH_RM(bp); + HASH_INS(bp, h); + } + + if (ch_offset >= bp->datasize) + /* + * After all that, we still don't have enough data. + * Go back and try again. + */ + goto read_more; + + return (bp->data[ch_offset]); +} + +/* + * ch_ungetchar is a rather kludgy and limited way to push + * a single char onto an input file descriptor. + */ + public void +ch_ungetchar(c) + int c; +{ + if (c != -1 && ch_ungotchar != -1) + error("ch_ungetchar overrun", NULL_PARG); + ch_ungotchar = c; +} + +#if LOGFILE +/* + * Close the logfile. + * If we haven't read all of standard input into it, do that now. + */ + public void +end_logfile() +{ + static int tried = FALSE; + + if (logfile < 0) + return; + if (!tried && ch_fsize == NULL_POSITION) + { + tried = TRUE; + ierror("Finishing logfile", NULL_PARG); + while (ch_forw_get() != EOI) + if (ABORT_SIGS()) + break; + } + close(logfile); + logfile = -1; + namelogfile = NULL; +} + +/* + * Start a log file AFTER less has already been running. + * Invoked from the - command; see toggle_option(). + * Write all the existing buffered data to the log file. + */ + public void +sync_logfile() +{ + register struct buf *bp; + int warned = FALSE; + BLOCKNUM block; + BLOCKNUM nblocks; + + nblocks = (ch_fpos + LBUFSIZE - 1) / LBUFSIZE; + for (block = 0; block < nblocks; block++) + { + for (bp = ch_bufhead; ; bp = bp->next) + { + if (bp == END_OF_CHAIN) + { + if (!warned) + { + error("Warning: log file is incomplete", + NULL_PARG); + warned = TRUE; + } + break; + } + if (bp->block == block) + { + write(logfile, (char *) bp->data, bp->datasize); + break; + } + } + } +} + +#endif + +/* + * Determine if a specific block is currently in one of the buffers. + */ + static int +buffered(block) + BLOCKNUM block; +{ + register struct buf *bp; + register int h; + + h = BUFHASH(block); + FOR_BUFS_IN_CHAIN(h, bp) + { + if (bp->block == block) + return (TRUE); + } + return (FALSE); +} + +/* + * Seek to a specified position in the file. + * Return 0 if successful, non-zero if can't seek there. + */ + public int +ch_seek(pos) + register POSITION pos; +{ + BLOCKNUM new_block; + POSITION len; + + len = ch_length(); + if (pos < ch_zero() || (len != NULL_POSITION && pos > len)) + return (1); + + new_block = pos / LBUFSIZE; + if (!(ch_flags & CH_CANSEEK) && pos != ch_fpos && !buffered(new_block)) + { + if (ch_fpos > pos) + return (1); + while (ch_fpos < pos) + { + if (ch_forw_get() == EOI) + return (1); + if (ABORT_SIGS()) + return (1); + } + return (0); + } + /* + * Set read pointer. + */ + ch_block = new_block; + ch_offset = pos % LBUFSIZE; + return (0); +} + +/* + * Seek to the end of the file. + */ + public int +ch_end_seek() +{ + POSITION len; + + if (ch_flags & CH_CANSEEK) + ch_fsize = filesize(ch_file); + + len = ch_length(); + if (len != NULL_POSITION) + return (ch_seek(len)); + + /* + * Do it the slow way: read till end of data. + */ + while (ch_forw_get() != EOI) + if (ABORT_SIGS()) + return (1); + return (0); +} + +/* + * Seek to the beginning of the file, or as close to it as we can get. + * We may not be able to seek there if input is a pipe and the + * beginning of the pipe is no longer buffered. + */ + public int +ch_beg_seek() +{ + register struct buf *bp, *firstbp; + + /* + * Try a plain ch_seek first. + */ + if (ch_seek(ch_zero()) == 0) + return (0); + + /* + * Can't get to position 0. + * Look thru the buffers for the one closest to position 0. + */ + firstbp = bp = ch_bufhead; + if (bp == END_OF_CHAIN) + return (1); + while ((bp = bp->next) != END_OF_CHAIN) + if (bp->block < firstbp->block) + firstbp = bp; + ch_block = firstbp->block; + ch_offset = 0; + return (0); +} + +/* + * Return the length of the file, if known. + */ + public POSITION +ch_length() +{ + if (ignore_eoi) + return (NULL_POSITION); + if (ch_flags & CH_HELPFILE) + return (size_helpdata); + return (ch_fsize); +} + +/* + * Return the current position in the file. + */ + public POSITION +ch_tell() +{ + return (ch_block * LBUFSIZE) + ch_offset; +} + +/* + * Get the current char and post-increment the read pointer. + */ + public int +ch_forw_get() +{ + register int c; + + c = ch_get(); + if (c == EOI) + return (EOI); + if (ch_offset < LBUFSIZE-1) + ch_offset++; + else + { + ch_block ++; + ch_offset = 0; + } + return (c); +} + +/* + * Pre-decrement the read pointer and get the new current char. + */ + public int +ch_back_get() +{ + if (ch_offset > 0) + ch_offset --; + else + { + if (ch_block <= 0) + return (EOI); + if (!(ch_flags & CH_CANSEEK) && !buffered(ch_block-1)) + return (EOI); + ch_block--; + ch_offset = LBUFSIZE-1; + } + return (ch_get()); +} + +/* + * Set max amount of buffer space. + * bufspace is in units of 1024 bytes. -1 mean no limit. + */ + public void +ch_setbufspace(bufspace) + int bufspace; +{ + if (bufspace < 0) + maxbufs = -1; + else + { + maxbufs = ((bufspace * 1024) + LBUFSIZE-1) / LBUFSIZE; + if (maxbufs < 1) + maxbufs = 1; + } +} + +/* + * Flush (discard) any saved file state, including buffer contents. + */ + public void +ch_flush() +{ + register struct buf *bp; + + if (!(ch_flags & CH_CANSEEK)) + { + /* + * If input is a pipe, we don't flush buffer contents, + * since the contents can't be recovered. + */ + ch_fsize = NULL_POSITION; + return; + } + + /* + * Initialize all the buffers. + */ + for (bp = ch_bufhead; bp != END_OF_CHAIN; bp = bp->next) + bp->block = -1; + + /* + * Figure out the size of the file, if we can. + */ + ch_fsize = filesize(ch_file); + + /* + * Seek to a known position: the beginning of the file. + */ + ch_fpos = 0; + ch_block = 0; /* ch_fpos / LBUFSIZE; */ + ch_offset = 0; /* ch_fpos % LBUFSIZE; */ + +#if 1 + /* + * This is a kludge to workaround a Linux kernel bug: files in + * /proc have a size of 0 according to fstat() but have readable + * data. They are sometimes, but not always, seekable. + * Force them to be non-seekable here. + */ + if (ch_fsize == 0) + { + ch_fsize = NULL_POSITION; + ch_flags &= ~CH_CANSEEK; + } +#endif + + if (lseek(ch_file, (off_t)0, 0) == BAD_LSEEK) + { + /* + * Warning only; even if the seek fails for some reason, + * there's a good chance we're at the beginning anyway. + * {{ I think this is bogus reasoning. }} + */ + error("seek error to 0", NULL_PARG); + } +} + +/* + * Allocate a new buffer. + * The buffer is added to the tail of the buffer chain. + */ + static int +ch_addbuf() +{ + register struct buf *bp; + + /* + * Allocate and initialize a new buffer and link it + * onto the tail of the buffer list. + */ + bp = (struct buf *) calloc(1, sizeof(struct buf)); + if (bp == NULL) + return (1); + ch_nbufs++; + bp->block = -1; + bp->next = END_OF_CHAIN; + bp->prev = ch_buftail; + ch_buftail->next = bp; + ch_buftail = bp; + HASH_INS(bp, 0); + return (0); +} + +/* + * + */ + static void +init_hashtbl() +{ + register int h; + + for (h = 0; h < BUFHASH_SIZE; h++) + { + thisfile->hashtbl[h].buf_hnext = END_OF_HCHAIN(h); + thisfile->hashtbl[h].buf_hprev = END_OF_HCHAIN(h); + } +} + +/* + * Delete all buffers for this file. + */ + static void +ch_delbufs() +{ + register struct buf *bp; + + while (ch_bufhead != END_OF_CHAIN) + { + bp = ch_bufhead; + bp->next->prev = bp->prev; + bp->prev->next = bp->next; + free(bp); + } + ch_nbufs = 0; + init_hashtbl(); +} + +/* + * Is it possible to seek on a file descriptor? + */ + public int +seekable(f) + int f; +{ +#if MSDOS_COMPILER + extern int fd0; + if (f == fd0 && !isatty(fd0)) + { + /* + * In MS-DOS, pipes are seekable. Check for + * standard input, and pretend it is not seekable. + */ + return (0); + } +#endif + return (lseek(f, (off_t)1, 0) != BAD_LSEEK); +} + +/* + * Initialize file state for a new file. + */ + public void +ch_init(f, flags) + int f; + int flags; +{ + /* + * See if we already have a filestate for this file. + */ + thisfile = (struct filestate *) get_filestate(curr_ifile); + if (thisfile == NULL) + { + /* + * Allocate and initialize a new filestate. + */ + thisfile = (struct filestate *) + calloc(1, sizeof(struct filestate)); + thisfile->buf_next = thisfile->buf_prev = END_OF_CHAIN; + thisfile->nbufs = 0; + thisfile->flags = 0; + thisfile->fpos = 0; + thisfile->block = 0; + thisfile->offset = 0; + thisfile->file = -1; + thisfile->fsize = NULL_POSITION; + ch_flags = flags; + init_hashtbl(); + /* + * Try to seek; set CH_CANSEEK if it works. + */ + if ((flags & CH_CANSEEK) && !seekable(f)) + ch_flags &= ~CH_CANSEEK; + set_filestate(curr_ifile, (void *) thisfile); + } + if (thisfile->file == -1) + thisfile->file = f; + ch_flush(); +} + +/* + * Close a filestate. + */ + public void +ch_close() +{ + int keepstate = FALSE; + + if (ch_flags & (CH_CANSEEK|CH_POPENED|CH_HELPFILE)) + { + /* + * We can seek or re-open, so we don't need to keep buffers. + */ + ch_delbufs(); + } else + keepstate = TRUE; + if (!(ch_flags & CH_KEEPOPEN)) + { + /* + * We don't need to keep the file descriptor open + * (because we can re-open it.) + * But don't really close it if it was opened via popen(), + * because pclose() wants to close it. + */ + if (!(ch_flags & (CH_POPENED|CH_HELPFILE))) + close(ch_file); + ch_file = -1; + } else + keepstate = TRUE; + if (!keepstate) + { + /* + * We don't even need to keep the filestate structure. + */ + free(thisfile); + thisfile = NULL; + set_filestate(curr_ifile, (void *) NULL); + } +} + +/* + * Return ch_flags for the current file. + */ + public int +ch_getflags() +{ + return (ch_flags); +} + +#if 0 + public void +ch_dump(struct filestate *fs) +{ + struct buf *bp; + unsigned char *s; + + if (fs == NULL) + { + printf(" --no filestate\n"); + return; + } + printf(" file %d, flags %x, fpos %x, fsize %x, blk/off %x/%x\n", + fs->file, fs->flags, fs->fpos, + fs->fsize, fs->block, fs->offset); + printf(" %d bufs:\n", fs->nbufs); + for (bp = fs->buf_next; bp != (struct buf *)fs; bp = bp->next) + { + printf("%x: blk %x, size %x \"", + bp, bp->block, bp->datasize); + for (s = bp->data; s < bp->data + 30; s++) + if (*s >= ' ' && *s < 0x7F) + printf("%c", *s); + else + printf("."); + printf("\"\n"); + } +} +#endif diff --git a/commands/less/less/charset.c b/commands/less/less/charset.c new file mode 100644 index 000000000..111d3322f --- /dev/null +++ b/commands/less/less/charset.c @@ -0,0 +1,1042 @@ +/* $NetBSD: charset.c,v 1.7 2006/10/26 01:33:08 mrg Exp $ */ + +/* + * Copyright (C) 1984-2005 Mark Nudelman + * + * You may distribute under the terms of either the GNU General Public + * License or the Less License, as specified in the README file. + * + * For more information about less, or for information on how to + * contact the author, see the README file. + */ + + +/* + * Functions to define the character set + * and do things specific to the character set. + */ + +#include "less.h" +#if HAVE_LOCALE +#include +#include +#include +#endif + +#include "charset.h" + +public int utf_mode = 0; + +/* + * Predefined character sets, + * selected by the LESSCHARSET environment variable. + */ +struct charset { + char *name; + int *p_flag; + char *desc; +} charsets[] = { + { "ascii", NULL, "8bcccbcc18b95.b" }, + { "utf-8", &utf_mode, "8bcccbcc18b95.b126.bb" }, + { "iso8859", NULL, "8bcccbcc18b95.33b." }, + { "latin3", NULL, "8bcccbcc18b95.33b5.b8.b15.b4.b12.b18.b12.b." }, + { "arabic", NULL, "8bcccbcc18b95.33b.3b.7b2.13b.3b.b26.5b19.b" }, + { "greek", NULL, "8bcccbcc18b95.33b4.2b4.b3.b35.b44.b" }, + { "greek2005", NULL, "8bcccbcc18b95.33b14.b35.b44.b" }, + { "hebrew", NULL, "8bcccbcc18b95.33b.b29.32b28.2b2.b" }, + { "koi8-r", NULL, "8bcccbcc18b95.b." }, + { "KOI8-T", NULL, "8bcccbcc18b95.b8.b6.b8.b.b.5b7.3b4.b4.b3.b.b.3b." }, + { "georgianps", NULL, "8bcccbcc18b95.3b11.4b12.2b." }, + { "tcvn", NULL, "b..b...bcccbccbbb7.8b95.b48.5b." }, + { "TIS-620", NULL, "8bcccbcc18b95.b.4b.11b7.8b." }, + { "next", NULL, "8bcccbcc18b95.bb125.bb" }, + { "dos", NULL, "8bcccbcc12bc5b95.b." }, + { "windows-1251", NULL, "8bcccbcc12bc5b95.b24.b." }, + { "windows-1252", NULL, "8bcccbcc12bc5b95.b.b11.b.2b12.b." }, + { "windows-1255", NULL, "8bcccbcc12bc5b95.b.b8.b.5b9.b.4b." }, + { "ebcdic", NULL, "5bc6bcc7bcc41b.9b7.9b5.b..8b6.10b6.b9.7b9.8b8.17b3.3b9.7b9.8b8.6b10.b.b.b." }, + { "IBM-1047", NULL, "4cbcbc3b9cbccbccbb4c6bcc5b3cbbc4bc4bccbc191.b" }, + { NULL, NULL, NULL } +}; + +/* + * Support "locale charmap"/nl_langinfo(CODESET) values, as well as others. + */ +struct cs_alias { + char *name; + char *oname; +} cs_aliases[] = { + { "UTF-8", "utf-8" }, + { "ANSI_X3.4-1968", "ascii" }, + { "US-ASCII", "ascii" }, + { "latin1", "iso8859" }, + { "ISO-8859-1", "iso8859" }, + { "latin9", "iso8859" }, + { "ISO-8859-15", "iso8859" }, + { "latin2", "iso8859" }, + { "ISO-8859-2", "iso8859" }, + { "ISO-8859-3", "latin3" }, + { "latin4", "iso8859" }, + { "ISO-8859-4", "iso8859" }, + { "cyrillic", "iso8859" }, + { "ISO-8859-5", "iso8859" }, + { "ISO-8859-6", "arabic" }, + { "ISO-8859-7", "greek" }, + { "IBM9005", "greek2005" }, + { "ISO-8859-8", "hebrew" }, + { "latin5", "iso8859" }, + { "ISO-8859-9", "iso8859" }, + { "latin6", "iso8859" }, + { "ISO-8859-10", "iso8859" }, + { "latin7", "iso8859" }, + { "ISO-8859-13", "iso8859" }, + { "latin8", "iso8859" }, + { "ISO-8859-14", "iso8859" }, + { "latin10", "iso8859" }, + { "ISO-8859-16", "iso8859" }, + { "IBM437", "dos" }, + { "EBCDIC-US", "ebcdic" }, + { "IBM1047", "IBM-1047" }, + { "KOI8-R", "koi8-r" }, + { "KOI8-U", "koi8-r" }, + { "GEORGIAN-PS", "georgianps" }, + { "TCVN5712-1", "tcvn" }, + { "NEXTSTEP", "next" }, + { "windows", "windows-1252" }, /* backward compatibility */ + { "CP1251", "windows-1251" }, + { "CP1252", "windows-1252" }, + { "CP1255", "windows-1255" }, + { NULL, NULL } +}; + +#define IS_BINARY_CHAR 01 +#define IS_CONTROL_CHAR 02 + +static char chardef[256]; +static char *binfmt = NULL; +static char *utfbinfmt = NULL; +public int binattr = AT_STANDOUT; + +static void ichardef __P((char *)); +static int icharset __P((char *, int)); +#if HAVE_LOCALE +static void ilocale __P((void)); +#endif + +/* + * Define a charset, given a description string. + * The string consists of 256 letters, + * one for each character in the charset. + * If the string is shorter than 256 letters, missing letters + * are taken to be identical to the last one. + * A decimal number followed by a letter is taken to be a + * repetition of the letter. + * + * Each letter is one of: + * . normal character + * b binary character + * c control character + */ + static void +ichardef(s) + char *s; +{ + register char *cp; + register int n; + register char v; + + n = 0; + v = 0; + cp = chardef; + while (*s != '\0') + { + switch (*s++) + { + case '.': + v = 0; + break; + case 'c': + v = IS_CONTROL_CHAR; + break; + case 'b': + v = IS_BINARY_CHAR|IS_CONTROL_CHAR; + break; + + case '0': case '1': case '2': case '3': case '4': + case '5': case '6': case '7': case '8': case '9': + n = (10 * n) + (s[-1] - '0'); + continue; + + default: + error("invalid chardef", NULL_PARG); + quit(QUIT_ERROR); + /*NOTREACHED*/ + } + + do + { + if (cp >= chardef + sizeof(chardef)) + { + error("chardef longer than 256", NULL_PARG); + quit(QUIT_ERROR); + /*NOTREACHED*/ + } + *cp++ = v; + } while (--n > 0); + n = 0; + } + + while (cp < chardef + sizeof(chardef)) + *cp++ = v; +} + +/* + * Define a charset, given a charset name. + * The valid charset names are listed in the "charsets" array. + */ + static int +icharset(name, no_error) + register char *name; + int no_error; +{ + register struct charset *p; + register struct cs_alias *a; + + if (name == NULL || *name == '\0') + return (0); + + /* First see if the name is an alias. */ + for (a = cs_aliases; a->name != NULL; a++) + { + if (strcmp(name, a->name) == 0) + { + name = a->oname; + break; + } + } + + for (p = charsets; p->name != NULL; p++) + { + if (strcmp(name, p->name) == 0) + { + ichardef(p->desc); + if (p->p_flag != NULL) + *(p->p_flag) = 1; + return (1); + } + } + + if (!no_error) { + error("invalid charset name", NULL_PARG); + quit(QUIT_ERROR); + } + return (0); +} + +#if HAVE_LOCALE +/* + * Define a charset, given a locale name. + */ + static void +ilocale() +{ + register int c; + + for (c = 0; c < (int) sizeof(chardef); c++) + { + if (isprint(c)) + chardef[c] = 0; + else if (iscntrl(c)) + chardef[c] = IS_CONTROL_CHAR; + else + chardef[c] = IS_BINARY_CHAR|IS_CONTROL_CHAR; + } +} +#endif + +/* + * Define the printing format for control (or binary utf) chars. + */ + static void +setbinfmt(s, fmtvarptr, default_fmt) + char *s; + char **fmtvarptr; + char *default_fmt; +{ + if (s && utf_mode) + { + /* It would be too hard to account for width otherwise. */ + char *t = s; + while (*t) + { + if (*t < ' ' || *t > '~') + { + s = default_fmt; + goto attr; + } + t++; + } + } + + /* %n is evil */ + if (s == NULL || *s == '\0' || + (*s == '*' && (s[1] == '\0' || s[2] == '\0' || strchr(s + 2, 'n'))) || + (*s != '*' && strchr(s, 'n'))) + s = default_fmt; + + /* + * Select the attributes if it starts with "*". + */ + attr: + if (*s == '*') + { + switch (s[1]) + { + case 'd': binattr = AT_BOLD; break; + case 'k': binattr = AT_BLINK; break; + case 's': binattr = AT_STANDOUT; break; + case 'u': binattr = AT_UNDERLINE; break; + default: binattr = AT_NORMAL; break; + } + s += 2; + } + *fmtvarptr = s; +} + +/* + * + */ + static void +set_charset() +{ + char *s; + + /* + * See if environment variable LESSCHARSET is defined. + */ + s = lgetenv("LESSCHARSET"); + if (icharset(s, 0)) + return; + + /* + * LESSCHARSET is not defined: try LESSCHARDEF. + */ + s = lgetenv("LESSCHARDEF"); + if (s != NULL && *s != '\0') + { + ichardef(s); + return; + } + +#if HAVE_LOCALE + /* + * Try using the codeset name as the charset name. + */ + s = nl_langinfo(CODESET); + if (icharset(s, 1)) + return; +#endif + +#if HAVE_STRSTR + /* + * Check whether LC_ALL, LC_CTYPE or LANG look like UTF-8 is used. + */ + if ((s = lgetenv("LC_ALL")) != NULL || + (s = lgetenv("LC_CTYPE")) != NULL || + (s = lgetenv("LANG")) != NULL) + { + if ( strstr(s, "UTF-8") != NULL || strstr(s, "utf-8") != NULL + || strstr(s, "UTF8") != NULL || strstr(s, "utf8") != NULL) + if (icharset("utf-8", 1)) + return; + } +#endif + +#if HAVE_LOCALE + /* + * Get character definitions from locale functions, + * rather than from predefined charset entry. + */ + ilocale(); +#if MSDOS_COMPILER + /* + * Default to "dos". + */ + (void) icharset("dos", 1); +#else + /* + * Default to "latin1". + */ + (void) icharset("latin1", 1); +#endif +#endif +} + +/* + * Initialize charset data structures. + */ + public void +init_charset() +{ + char *s; + +#if HAVE_LOCALE + setlocale(LC_ALL, ""); +#endif + + set_charset(); + + s = lgetenv("LESSBINFMT"); + setbinfmt(s, &binfmt, "*s<%02X>"); + + s = lgetenv("LESSUTFBINFMT"); + setbinfmt(s, &utfbinfmt, ""); +} + +/* + * Is a given character a "binary" character? + */ + public int +binary_char(c) + unsigned int c; +{ + c &= 0377; + return (chardef[c] & IS_BINARY_CHAR); +} + +/* + * Is a given character a "control" character? + */ + public int +control_char(c) + int c; +{ + c &= 0377; + return (chardef[c] & IS_CONTROL_CHAR); +} + +/* + * Return the printable form of a character. + * For example, in the "ascii" charset '\3' is printed as "^C". + */ + public char * +prchar(c) + int c; +{ + /* {{ This buffer can be overrun if LESSBINFMT is a long string. }} */ + static char buf[32]; + + c &= 0377; + if ((c < 128 || !utf_mode) && !control_char(c)) + SNPRINTF1(buf, sizeof(buf), "%c", c); + else if (c == ESC) + strcpy(buf, "ESC"); +#if IS_EBCDIC_HOST + else if (!binary_char(c) && c < 64) + SNPRINTF1(buf, sizeof(buf), "^%c", + /* + * This array roughly inverts CONTROL() #defined in less.h, + * and should be kept in sync with CONTROL() and IBM-1047. + */ + "@ABC.I.?...KLMNO" + "PQRS.JH.XY.." + "\\]^_" + "......W[.....EFG" + "..V....D....TU.Z"[c]); +#else + else if (c < 128 && !control_char(c ^ 0100)) + SNPRINTF1(buf, sizeof(buf), "^%c", c ^ 0100); +#endif + else + SNPRINTF1(buf, sizeof(buf), binfmt, c); + return (buf); +} + +/* + * Return the printable form of a UTF-8 character. + */ + public char * +prutfchar(ch) + LWCHAR ch; +{ + static char buf[32]; + + if (ch == ESC) + strcpy(buf, "ESC"); + else if (ch < 128 && control_char(ch)) + { + if (!control_char(ch ^ 0100)) + SNPRINTF1(buf, sizeof(buf), "^%c", ((char) ch) ^ 0100); + else + SNPRINTF1(buf, sizeof(buf), binfmt, (char) ch); + } else if (is_ubin_char(ch)) + SNPRINTF1(buf, sizeof(buf), utfbinfmt, ch); + else + { + int len; + if (ch >= 0x80000000) + { + len = 3; + ch = 0xFFFD; + } else + { + len = (ch < 0x80) ? 1 + : (ch < 0x800) ? 2 + : (ch < 0x10000) ? 3 + : (ch < 0x200000) ? 4 + : (ch < 0x4000000) ? 5 + : 6; + } + buf[len] = '\0'; + if (len == 1) + *buf = (char) ch; + else + { + *buf = ((1 << len) - 1) << (8 - len); + while (--len > 0) + { + buf[len] = (char) (0x80 | (ch & 0x3F)); + ch >>= 6; + } + *buf |= ch; + } + } + return (buf); +} + +/* + * Get the length of a UTF-8 character in bytes. + */ + public int +utf_len(ch) + char ch; +{ + if ((ch & 0x80) == 0) + return 1; + if ((ch & 0xE0) == 0xC0) + return 2; + if ((ch & 0xF0) == 0xE0) + return 3; + if ((ch & 0xF8) == 0xF0) + return 4; + if ((ch & 0xFC) == 0xF8) + return 5; + if ((ch & 0xFE) == 0xFC) + return 6; + /* Invalid UTF-8 encoding. */ + return 1; +} + +/* + * Is a UTF-8 character well-formed? + */ + public int +is_utf8_well_formed(s) + unsigned char *s; +{ + int i; + int len; + + if (IS_UTF8_INVALID(s[0])) + return (0); + + len = utf_len((char) s[0]); + if (len == 1) + return (1); + if (len == 2) + { + if (s[0] < 0xC2) + return (0); + } else + { + unsigned char mask; + mask = (~((1 << (8-len)) - 1)) & 0xFF; + if (s[0] == mask && (s[1] & mask) == 0x80) + return (0); + } + + for (i = 1; i < len; i++) + if (!IS_UTF8_TRAIL(s[i])) + return (0); + return (1); +} + +/* + * Get the value of a UTF-8 character. + */ + public LWCHAR +get_wchar(p) + char *p; +{ + switch (utf_len(p[0])) + { + case 1: + default: + return (LWCHAR) + (p[0] & 0xFF); + case 2: + return (LWCHAR) ( + ((p[0] & 0x1F) << 6) | + (p[1] & 0x3F)); + case 3: + return (LWCHAR) ( + ((p[0] & 0x0F) << 12) | + ((p[1] & 0x3F) << 6) | + (p[2] & 0x3F)); + case 4: + return (LWCHAR) ( + ((p[0] & 0x07) << 18) | + ((p[1] & 0x3F) << 12) | + ((p[2] & 0x3F) << 6) | + (p[3] & 0x3F)); + case 5: + return (LWCHAR) ( + ((p[0] & 0x03) << 24) | + ((p[1] & 0x3F) << 18) | + ((p[2] & 0x3F) << 12) | + ((p[3] & 0x3F) << 6) | + (p[4] & 0x3F)); + case 6: + return (LWCHAR) ( + ((p[0] & 0x01) << 30) | + ((p[1] & 0x3F) << 24) | + ((p[2] & 0x3F) << 18) | + ((p[3] & 0x3F) << 12) | + ((p[4] & 0x3F) << 6) | + (p[5] & 0x3F)); + } +} + +/* + * Step forward or backward one character in a string. + */ + public LWCHAR +step_char(pp, dir, limit) + char **pp; + signed int dir; + char *limit; +{ + LWCHAR ch; + char *p = *pp; + + if (!utf_mode) + { + /* It's easy if chars are one byte. */ + if (dir > 0) + ch = (LWCHAR) ((p < limit) ? *p++ : 0); + else + ch = (LWCHAR) ((p > limit) ? *--p : 0); + } else if (dir > 0) + { + if (p + utf_len(*p) > limit) + ch = 0; + else + { + ch = get_wchar(p); + p++; + while (IS_UTF8_TRAIL(*p)) + p++; + } + } else + { + while (p > limit && IS_UTF8_TRAIL(p[-1])) + p--; + if (p > limit) + ch = get_wchar(--p); + else + ch = 0; + } + *pp = p; + return ch; +} + +/* + * Unicode characters data + */ +struct wchar_range { LWCHAR first, last; }; + +static struct wchar_range comp_table[] = { + {0x300,0x357}, {0x35d,0x36f}, {0x483,0x486}, {0x488,0x489}, + {0x591,0x5a1}, {0x5a3,0x5b9}, {0x5bb,0x5bd}, {0x5bf,0x5bf}, + {0x5c1,0x5c2}, {0x5c4,0x5c4}, {0x610,0x615}, {0x64b,0x658}, + {0x670,0x670}, {0x6d6,0x6dc}, {0x6de,0x6e4}, {0x6e7,0x6e8}, + {0x6ea,0x6ed}, {0x711,0x711}, {0x730,0x74a}, {0x7a6,0x7b0}, + {0x901,0x902}, {0x93c,0x93c}, {0x941,0x948}, {0x94d,0x94d}, + {0x951,0x954}, {0x962,0x963}, {0x981,0x981}, {0x9bc,0x9bc}, + {0x9c1,0x9c4}, {0x9cd,0x9cd}, {0x9e2,0x9e3}, {0xa01,0xa02}, + {0xa3c,0xa3c}, {0xa41,0xa42}, {0xa47,0xa48}, {0xa4b,0xa4d}, + {0xa70,0xa71}, {0xa81,0xa82}, {0xabc,0xabc}, {0xac1,0xac5}, + {0xac7,0xac8}, {0xacd,0xacd}, {0xae2,0xae3}, {0xb01,0xb01}, + {0xb3c,0xb3c}, {0xb3f,0xb3f}, {0xb41,0xb43}, {0xb4d,0xb4d}, + {0xb56,0xb56}, {0xb82,0xb82}, {0xbc0,0xbc0}, {0xbcd,0xbcd}, + {0xc3e,0xc40}, {0xc46,0xc48}, {0xc4a,0xc4d}, {0xc55,0xc56}, + {0xcbc,0xcbc}, {0xcbf,0xcbf}, {0xcc6,0xcc6}, {0xccc,0xccd}, + {0xd41,0xd43}, {0xd4d,0xd4d}, {0xdca,0xdca}, {0xdd2,0xdd4}, + {0xdd6,0xdd6}, {0xe31,0xe31}, {0xe34,0xe3a}, {0xe47,0xe4e}, + {0xeb1,0xeb1}, {0xeb4,0xeb9}, {0xebb,0xebc}, {0xec8,0xecd}, + {0xf18,0xf19}, {0xf35,0xf35}, {0xf37,0xf37}, {0xf39,0xf39}, + {0xf71,0xf7e}, {0xf80,0xf84}, {0xf86,0xf87}, {0xf90,0xf97}, + {0xf99,0xfbc}, {0xfc6,0xfc6}, {0x102d,0x1030}, {0x1032,0x1032}, + {0x1036,0x1037}, {0x1039,0x1039}, {0x1058,0x1059}, + {0x1712,0x1714}, {0x1732,0x1734}, {0x1752,0x1753}, + {0x1772,0x1773}, {0x17b7,0x17bd}, {0x17c6,0x17c6}, + {0x17c9,0x17d3}, {0x17dd,0x17dd}, {0x180b,0x180d}, + {0x18a9,0x18a9}, {0x1920,0x1922}, {0x1927,0x1928}, + {0x1932,0x1932}, {0x1939,0x193b}, {0x20d0,0x20ea}, + {0x302a,0x302f}, {0x3099,0x309a}, {0xfb1e,0xfb1e}, + {0xfe00,0xfe0f}, {0xfe20,0xfe23}, {0x1d167,0x1d169}, + {0x1d17b,0x1d182}, {0x1d185,0x1d18b}, {0x1d1aa,0x1d1ad}, + {0xe0100,0xe01ef}, +}; + +static struct wchar_range comb_table[] = { + {0x0644,0x0622}, {0x0644,0x0623}, {0x0644,0x0625}, {0x0644,0x0627}, +}; + +/* + * Characters with general category values + * Cc: Other, Control + * Cf: Other, Format + * Cs: Other, Surrogate + * Co: Other, Private Use + * Cn: Other, Not Assigned + * Zl: Separator, Line + * Zp: Separator, Paragraph + */ +static struct wchar_range ubin_table[] = { + { 0x0000, 0x001f} /* Cc */, { 0x007f, 0x009f} /* Cc */, +#if 0 + { 0x00ad, 0x00ad} /* Cf */, +#endif + { 0x0237, 0x024f} /* Cn */, { 0x0358, 0x035c} /* Cn */, + { 0x0370, 0x0373} /* Cn */, { 0x0376, 0x0379} /* Cn */, + { 0x037b, 0x037d} /* Cn */, { 0x037f, 0x0383} /* Cn */, + { 0x038b, 0x038b} /* Cn */, { 0x038d, 0x038d} /* Cn */, + { 0x03a2, 0x03a2} /* Cn */, { 0x03cf, 0x03cf} /* Cn */, + { 0x03fc, 0x03ff} /* Cn */, { 0x0487, 0x0487} /* Cn */, + { 0x04cf, 0x04cf} /* Cn */, { 0x04f6, 0x04f7} /* Cn */, + { 0x04fa, 0x04ff} /* Cn */, { 0x0510, 0x0530} /* Cn */, + { 0x0557, 0x0558} /* Cn */, { 0x0560, 0x0560} /* Cn */, + { 0x0588, 0x0588} /* Cn */, { 0x058b, 0x0590} /* Cn */, + { 0x05a2, 0x05a2} /* Cn */, { 0x05ba, 0x05ba} /* Cn */, + { 0x05c5, 0x05cf} /* Cn */, { 0x05eb, 0x05ef} /* Cn */, + { 0x05f5, 0x05ff} /* Cn */, +#if 0 + { 0x0600, 0x0603} /* Cf */, +#endif + { 0x0604, 0x060b} /* Cn */, { 0x0616, 0x061a} /* Cn */, + { 0x061c, 0x061e} /* Cn */, { 0x0620, 0x0620} /* Cn */, + { 0x063b, 0x063f} /* Cn */, { 0x0659, 0x065f} /* Cn */, +#if 0 + { 0x06dd, 0x06dd} /* Cf */, +#endif + { 0x070e, 0x070e} /* Cn */, +#if 0 + { 0x070f, 0x070f} /* Cf */, +#endif + { 0x074b, 0x074c} /* Cn */, { 0x0750, 0x077f} /* Cn */, + { 0x07b2, 0x0900} /* Cn */, { 0x093a, 0x093b} /* Cn */, + { 0x094e, 0x094f} /* Cn */, { 0x0955, 0x0957} /* Cn */, + { 0x0971, 0x0980} /* Cn */, { 0x0984, 0x0984} /* Cn */, + { 0x098d, 0x098e} /* Cn */, { 0x0991, 0x0992} /* Cn */, + { 0x09a9, 0x09a9} /* Cn */, { 0x09b1, 0x09b1} /* Cn */, + { 0x09b3, 0x09b5} /* Cn */, { 0x09ba, 0x09bb} /* Cn */, + { 0x09c5, 0x09c6} /* Cn */, { 0x09c9, 0x09ca} /* Cn */, + { 0x09ce, 0x09d6} /* Cn */, { 0x09d8, 0x09db} /* Cn */, + { 0x09de, 0x09de} /* Cn */, { 0x09e4, 0x09e5} /* Cn */, + { 0x09fb, 0x0a00} /* Cn */, { 0x0a04, 0x0a04} /* Cn */, + { 0x0a0b, 0x0a0e} /* Cn */, { 0x0a11, 0x0a12} /* Cn */, + { 0x0a29, 0x0a29} /* Cn */, { 0x0a31, 0x0a31} /* Cn */, + { 0x0a34, 0x0a34} /* Cn */, { 0x0a37, 0x0a37} /* Cn */, + { 0x0a3a, 0x0a3b} /* Cn */, { 0x0a3d, 0x0a3d} /* Cn */, + { 0x0a43, 0x0a46} /* Cn */, { 0x0a49, 0x0a4a} /* Cn */, + { 0x0a4e, 0x0a58} /* Cn */, { 0x0a5d, 0x0a5d} /* Cn */, + { 0x0a5f, 0x0a65} /* Cn */, { 0x0a75, 0x0a80} /* Cn */, + { 0x0a84, 0x0a84} /* Cn */, { 0x0a8e, 0x0a8e} /* Cn */, + { 0x0a92, 0x0a92} /* Cn */, { 0x0aa9, 0x0aa9} /* Cn */, + { 0x0ab1, 0x0ab1} /* Cn */, { 0x0ab4, 0x0ab4} /* Cn */, + { 0x0aba, 0x0abb} /* Cn */, { 0x0ac6, 0x0ac6} /* Cn */, + { 0x0aca, 0x0aca} /* Cn */, { 0x0ace, 0x0acf} /* Cn */, + { 0x0ad1, 0x0adf} /* Cn */, { 0x0ae4, 0x0ae5} /* Cn */, + { 0x0af0, 0x0af0} /* Cn */, { 0x0af2, 0x0b00} /* Cn */, + { 0x0b04, 0x0b04} /* Cn */, { 0x0b0d, 0x0b0e} /* Cn */, + { 0x0b11, 0x0b12} /* Cn */, { 0x0b29, 0x0b29} /* Cn */, + { 0x0b31, 0x0b31} /* Cn */, { 0x0b34, 0x0b34} /* Cn */, + { 0x0b3a, 0x0b3b} /* Cn */, { 0x0b44, 0x0b46} /* Cn */, + { 0x0b49, 0x0b4a} /* Cn */, { 0x0b4e, 0x0b55} /* Cn */, + { 0x0b58, 0x0b5b} /* Cn */, { 0x0b5e, 0x0b5e} /* Cn */, + { 0x0b62, 0x0b65} /* Cn */, { 0x0b72, 0x0b81} /* Cn */, + { 0x0b84, 0x0b84} /* Cn */, { 0x0b8b, 0x0b8d} /* Cn */, + { 0x0b91, 0x0b91} /* Cn */, { 0x0b96, 0x0b98} /* Cn */, + { 0x0b9b, 0x0b9b} /* Cn */, { 0x0b9d, 0x0b9d} /* Cn */, + { 0x0ba0, 0x0ba2} /* Cn */, { 0x0ba5, 0x0ba7} /* Cn */, + { 0x0bab, 0x0bad} /* Cn */, { 0x0bb6, 0x0bb6} /* Cn */, + { 0x0bba, 0x0bbd} /* Cn */, { 0x0bc3, 0x0bc5} /* Cn */, + { 0x0bc9, 0x0bc9} /* Cn */, { 0x0bce, 0x0bd6} /* Cn */, + { 0x0bd8, 0x0be6} /* Cn */, { 0x0bfb, 0x0c00} /* Cn */, + { 0x0c04, 0x0c04} /* Cn */, { 0x0c0d, 0x0c0d} /* Cn */, + { 0x0c11, 0x0c11} /* Cn */, { 0x0c29, 0x0c29} /* Cn */, + { 0x0c34, 0x0c34} /* Cn */, { 0x0c3a, 0x0c3d} /* Cn */, + { 0x0c45, 0x0c45} /* Cn */, { 0x0c49, 0x0c49} /* Cn */, + { 0x0c4e, 0x0c54} /* Cn */, { 0x0c57, 0x0c5f} /* Cn */, + { 0x0c62, 0x0c65} /* Cn */, { 0x0c70, 0x0c81} /* Cn */, + { 0x0c84, 0x0c84} /* Cn */, { 0x0c8d, 0x0c8d} /* Cn */, + { 0x0c91, 0x0c91} /* Cn */, { 0x0ca9, 0x0ca9} /* Cn */, + { 0x0cb4, 0x0cb4} /* Cn */, { 0x0cba, 0x0cbb} /* Cn */, + { 0x0cc5, 0x0cc5} /* Cn */, { 0x0cc9, 0x0cc9} /* Cn */, + { 0x0cce, 0x0cd4} /* Cn */, { 0x0cd7, 0x0cdd} /* Cn */, + { 0x0cdf, 0x0cdf} /* Cn */, { 0x0ce2, 0x0ce5} /* Cn */, + { 0x0cf0, 0x0d01} /* Cn */, { 0x0d04, 0x0d04} /* Cn */, + { 0x0d0d, 0x0d0d} /* Cn */, { 0x0d11, 0x0d11} /* Cn */, + { 0x0d29, 0x0d29} /* Cn */, { 0x0d3a, 0x0d3d} /* Cn */, + { 0x0d44, 0x0d45} /* Cn */, { 0x0d49, 0x0d49} /* Cn */, + { 0x0d4e, 0x0d56} /* Cn */, { 0x0d58, 0x0d5f} /* Cn */, + { 0x0d62, 0x0d65} /* Cn */, { 0x0d70, 0x0d81} /* Cn */, + { 0x0d84, 0x0d84} /* Cn */, { 0x0d97, 0x0d99} /* Cn */, + { 0x0db2, 0x0db2} /* Cn */, { 0x0dbc, 0x0dbc} /* Cn */, + { 0x0dbe, 0x0dbf} /* Cn */, { 0x0dc7, 0x0dc9} /* Cn */, + { 0x0dcb, 0x0dce} /* Cn */, { 0x0dd5, 0x0dd5} /* Cn */, + { 0x0dd7, 0x0dd7} /* Cn */, { 0x0de0, 0x0df1} /* Cn */, + { 0x0df5, 0x0e00} /* Cn */, { 0x0e3b, 0x0e3e} /* Cn */, + { 0x0e5c, 0x0e80} /* Cn */, { 0x0e83, 0x0e83} /* Cn */, + { 0x0e85, 0x0e86} /* Cn */, { 0x0e89, 0x0e89} /* Cn */, + { 0x0e8b, 0x0e8c} /* Cn */, { 0x0e8e, 0x0e93} /* Cn */, + { 0x0e98, 0x0e98} /* Cn */, { 0x0ea0, 0x0ea0} /* Cn */, + { 0x0ea4, 0x0ea4} /* Cn */, { 0x0ea6, 0x0ea6} /* Cn */, + { 0x0ea8, 0x0ea9} /* Cn */, { 0x0eac, 0x0eac} /* Cn */, + { 0x0eba, 0x0eba} /* Cn */, { 0x0ebe, 0x0ebf} /* Cn */, + { 0x0ec5, 0x0ec5} /* Cn */, { 0x0ec7, 0x0ec7} /* Cn */, + { 0x0ece, 0x0ecf} /* Cn */, { 0x0eda, 0x0edb} /* Cn */, + { 0x0ede, 0x0eff} /* Cn */, { 0x0f48, 0x0f48} /* Cn */, + { 0x0f6b, 0x0f70} /* Cn */, { 0x0f8c, 0x0f8f} /* Cn */, + { 0x0f98, 0x0f98} /* Cn */, { 0x0fbd, 0x0fbd} /* Cn */, + { 0x0fcd, 0x0fce} /* Cn */, { 0x0fd0, 0x0fff} /* Cn */, + { 0x1022, 0x1022} /* Cn */, { 0x1028, 0x1028} /* Cn */, + { 0x102b, 0x102b} /* Cn */, { 0x1033, 0x1035} /* Cn */, + { 0x103a, 0x103f} /* Cn */, { 0x105a, 0x109f} /* Cn */, + { 0x10c6, 0x10cf} /* Cn */, { 0x10f9, 0x10fa} /* Cn */, + { 0x10fc, 0x10ff} /* Cn */, { 0x115a, 0x115e} /* Cn */, + { 0x11a3, 0x11a7} /* Cn */, { 0x11fa, 0x11ff} /* Cn */, + { 0x1207, 0x1207} /* Cn */, { 0x1247, 0x1247} /* Cn */, + { 0x1249, 0x1249} /* Cn */, { 0x124e, 0x124f} /* Cn */, + { 0x1257, 0x1257} /* Cn */, { 0x1259, 0x1259} /* Cn */, + { 0x125e, 0x125f} /* Cn */, { 0x1287, 0x1287} /* Cn */, + { 0x1289, 0x1289} /* Cn */, { 0x128e, 0x128f} /* Cn */, + { 0x12af, 0x12af} /* Cn */, { 0x12b1, 0x12b1} /* Cn */, + { 0x12b6, 0x12b7} /* Cn */, { 0x12bf, 0x12bf} /* Cn */, + { 0x12c1, 0x12c1} /* Cn */, { 0x12c6, 0x12c7} /* Cn */, + { 0x12cf, 0x12cf} /* Cn */, { 0x12d7, 0x12d7} /* Cn */, + { 0x12ef, 0x12ef} /* Cn */, { 0x130f, 0x130f} /* Cn */, + { 0x1311, 0x1311} /* Cn */, { 0x1316, 0x1317} /* Cn */, + { 0x131f, 0x131f} /* Cn */, { 0x1347, 0x1347} /* Cn */, + { 0x135b, 0x1360} /* Cn */, { 0x137d, 0x139f} /* Cn */, + { 0x13f5, 0x1400} /* Cn */, { 0x1677, 0x167f} /* Cn */, + { 0x169d, 0x169f} /* Cn */, { 0x16f1, 0x16ff} /* Cn */, + { 0x170d, 0x170d} /* Cn */, { 0x1715, 0x171f} /* Cn */, + { 0x1737, 0x173f} /* Cn */, { 0x1754, 0x175f} /* Cn */, + { 0x176d, 0x176d} /* Cn */, { 0x1771, 0x1771} /* Cn */, + { 0x1774, 0x177f} /* Cn */, +#if 0 + { 0x17b4, 0x17b5} /* Cf */, +#endif + { 0x17de, 0x17df} /* Cn */, { 0x17ea, 0x17ef} /* Cn */, + { 0x17fa, 0x17ff} /* Cn */, { 0x180f, 0x180f} /* Cn */, + { 0x181a, 0x181f} /* Cn */, { 0x1878, 0x187f} /* Cn */, + { 0x18aa, 0x18ff} /* Cn */, { 0x191d, 0x191f} /* Cn */, + { 0x192c, 0x192f} /* Cn */, { 0x193c, 0x193f} /* Cn */, + { 0x1941, 0x1943} /* Cn */, { 0x196e, 0x196f} /* Cn */, + { 0x1975, 0x19df} /* Cn */, { 0x1a00, 0x1cff} /* Cn */, + { 0x1d6c, 0x1dff} /* Cn */, { 0x1e9c, 0x1e9f} /* Cn */, + { 0x1efa, 0x1eff} /* Cn */, { 0x1f16, 0x1f17} /* Cn */, + { 0x1f1e, 0x1f1f} /* Cn */, { 0x1f46, 0x1f47} /* Cn */, + { 0x1f4e, 0x1f4f} /* Cn */, { 0x1f58, 0x1f58} /* Cn */, + { 0x1f5a, 0x1f5a} /* Cn */, { 0x1f5c, 0x1f5c} /* Cn */, + { 0x1f5e, 0x1f5e} /* Cn */, { 0x1f7e, 0x1f7f} /* Cn */, + { 0x1fb5, 0x1fb5} /* Cn */, { 0x1fc5, 0x1fc5} /* Cn */, + { 0x1fd4, 0x1fd5} /* Cn */, { 0x1fdc, 0x1fdc} /* Cn */, + { 0x1ff0, 0x1ff1} /* Cn */, { 0x1ff5, 0x1ff5} /* Cn */, + { 0x1fff, 0x1fff} /* Cn */, { 0x200b, 0x200f} /* Cf */, + { 0x2028, 0x2028} /* Zl */, + { 0x2029, 0x2029} /* Zp */, + { 0x202a, 0x202e} /* Cf */, + { 0x2055, 0x2056} /* Cn */, { 0x2058, 0x205e} /* Cn */, + { 0x2060, 0x2063} /* Cf */, + { 0x2064, 0x2069} /* Cn */, + { 0x206a, 0x206f} /* Cf */, + { 0x2072, 0x2073} /* Cn */, { 0x208f, 0x209f} /* Cn */, + { 0x20b2, 0x20cf} /* Cn */, { 0x20eb, 0x20ff} /* Cn */, + { 0x213c, 0x213c} /* Cn */, { 0x214c, 0x2152} /* Cn */, + { 0x2184, 0x218f} /* Cn */, { 0x23d1, 0x23ff} /* Cn */, + { 0x2427, 0x243f} /* Cn */, { 0x244b, 0x245f} /* Cn */, + { 0x2618, 0x2618} /* Cn */, { 0x267e, 0x267f} /* Cn */, + { 0x2692, 0x269f} /* Cn */, { 0x26a2, 0x2700} /* Cn */, + { 0x2705, 0x2705} /* Cn */, { 0x270a, 0x270b} /* Cn */, + { 0x2728, 0x2728} /* Cn */, { 0x274c, 0x274c} /* Cn */, + { 0x274e, 0x274e} /* Cn */, { 0x2753, 0x2755} /* Cn */, + { 0x2757, 0x2757} /* Cn */, { 0x275f, 0x2760} /* Cn */, + { 0x2795, 0x2797} /* Cn */, { 0x27b0, 0x27b0} /* Cn */, + { 0x27bf, 0x27cf} /* Cn */, { 0x27ec, 0x27ef} /* Cn */, + { 0x2b0e, 0x2e7f} /* Cn */, { 0x2e9a, 0x2e9a} /* Cn */, + { 0x2ef4, 0x2eff} /* Cn */, { 0x2fd6, 0x2fef} /* Cn */, + { 0x2ffc, 0x2fff} /* Cn */, { 0x3040, 0x3040} /* Cn */, + { 0x3097, 0x3098} /* Cn */, { 0x3100, 0x3104} /* Cn */, + { 0x312d, 0x3130} /* Cn */, { 0x318f, 0x318f} /* Cn */, + { 0x31b8, 0x31ef} /* Cn */, { 0x321f, 0x321f} /* Cn */, + { 0x3244, 0x324f} /* Cn */, { 0x327e, 0x327e} /* Cn */, + { 0x32ff, 0x32ff} /* Cn */, { 0x4db6, 0x4dbf} /* Cn */, + { 0x9fa6, 0x9fff} /* Cn */, { 0xa48d, 0xa48f} /* Cn */, + { 0xa4c7, 0xabff} /* Cn */, { 0xd7a4, 0xd7ff} /* Cn */, + { 0xd800, 0xdfff} /* Cs */, + { 0xe000, 0xf8ff} /* Co */, + { 0xfa2e, 0xfa2f} /* Cn */, { 0xfa6b, 0xfaff} /* Cn */, + { 0xfb07, 0xfb12} /* Cn */, { 0xfb18, 0xfb1c} /* Cn */, + { 0xfb37, 0xfb37} /* Cn */, { 0xfb3d, 0xfb3d} /* Cn */, + { 0xfb3f, 0xfb3f} /* Cn */, { 0xfb42, 0xfb42} /* Cn */, + { 0xfb45, 0xfb45} /* Cn */, { 0xfbb2, 0xfbd2} /* Cn */, + { 0xfd40, 0xfd4f} /* Cn */, { 0xfd90, 0xfd91} /* Cn */, + { 0xfdc8, 0xfdef} /* Cn */, { 0xfdfe, 0xfdff} /* Cn */, + { 0xfe10, 0xfe1f} /* Cn */, { 0xfe24, 0xfe2f} /* Cn */, + { 0xfe53, 0xfe53} /* Cn */, { 0xfe67, 0xfe67} /* Cn */, + { 0xfe6c, 0xfe6f} /* Cn */, { 0xfe75, 0xfe75} /* Cn */, + { 0xfefd, 0xfefe} /* Cn */, + { 0xfeff, 0xfeff} /* Cf */, + { 0xff00, 0xff00} /* Cn */, { 0xffbf, 0xffc1} /* Cn */, + { 0xffc8, 0xffc9} /* Cn */, { 0xffd0, 0xffd1} /* Cn */, + { 0xffd8, 0xffd9} /* Cn */, { 0xffdd, 0xffdf} /* Cn */, + { 0xffe7, 0xffe7} /* Cn */, { 0xffef, 0xfff8} /* Cn */, + { 0xfff9, 0xfffb} /* Cf */, + { 0xfffe, 0xffff} /* Cn */, { 0x1000c, 0x1000c} /* Cn */, + { 0x10027, 0x10027} /* Cn */, { 0x1003b, 0x1003b} /* Cn */, + { 0x1003e, 0x1003e} /* Cn */, { 0x1004e, 0x1004f} /* Cn */, + { 0x1005e, 0x1007f} /* Cn */, { 0x100fb, 0x100ff} /* Cn */, + { 0x10103, 0x10106} /* Cn */, { 0x10134, 0x10136} /* Cn */, + { 0x10140, 0x102ff} /* Cn */, { 0x1031f, 0x1031f} /* Cn */, + { 0x10324, 0x1032f} /* Cn */, { 0x1034b, 0x1037f} /* Cn */, + { 0x1039e, 0x1039e} /* Cn */, { 0x103a0, 0x103ff} /* Cn */, + { 0x1049e, 0x1049f} /* Cn */, { 0x104aa, 0x107ff} /* Cn */, + { 0x10806, 0x10807} /* Cn */, { 0x10809, 0x10809} /* Cn */, + { 0x10836, 0x10836} /* Cn */, { 0x10839, 0x1083b} /* Cn */, + { 0x1083d, 0x1083e} /* Cn */, { 0x10840, 0x1cfff} /* Cn */, + { 0x1d0f6, 0x1d0ff} /* Cn */, { 0x1d127, 0x1d129} /* Cn */, + { 0x1d173, 0x1d17a} /* Cf */, + { 0x1d1de, 0x1d2ff} /* Cn */, { 0x1d357, 0x1d3ff} /* Cn */, + { 0x1d455, 0x1d455} /* Cn */, { 0x1d49d, 0x1d49d} /* Cn */, + { 0x1d4a0, 0x1d4a1} /* Cn */, { 0x1d4a3, 0x1d4a4} /* Cn */, + { 0x1d4a7, 0x1d4a8} /* Cn */, { 0x1d4ad, 0x1d4ad} /* Cn */, + { 0x1d4ba, 0x1d4ba} /* Cn */, { 0x1d4bc, 0x1d4bc} /* Cn */, + { 0x1d4c4, 0x1d4c4} /* Cn */, { 0x1d506, 0x1d506} /* Cn */, + { 0x1d50b, 0x1d50c} /* Cn */, { 0x1d515, 0x1d515} /* Cn */, + { 0x1d51d, 0x1d51d} /* Cn */, { 0x1d53a, 0x1d53a} /* Cn */, + { 0x1d53f, 0x1d53f} /* Cn */, { 0x1d545, 0x1d545} /* Cn */, + { 0x1d547, 0x1d549} /* Cn */, { 0x1d551, 0x1d551} /* Cn */, + { 0x1d6a4, 0x1d6a7} /* Cn */, { 0x1d7ca, 0x1d7cd} /* Cn */, + { 0x1d800, 0x1ffff} /* Cn */, { 0x2a6d7, 0x2f7ff} /* Cn */, + { 0x2fa1e, 0xe0000} /* Cn */, + { 0xe0001, 0xe0001} /* Cf */, + { 0xe0002, 0xe001f} /* Cn */, + { 0xe0020, 0xe007f} /* Cf */, + { 0xe0080, 0xe00ff} /* Cn */, { 0xe01f0, 0xeffff} /* Cn */, + { 0xf0000, 0xffffd} /* Co */, + { 0xffffe, 0xfffff} /* Cn */, + {0x100000,0x10fffd} /* Co */, + {0x10fffe,0x10ffff} /* Cn */, + {0x110000,0x7fffffff} /* ISO 10646?? */ +}; + +/* + * Double width characters + * W: East Asian Wide + * F: East Asian Full-width + */ +static struct wchar_range wide_table[] = { + { 0x1100, 0x115f} /* W */, { 0x2329, 0x232a} /* W */, + { 0x2E80, 0x2FFB} /* W */, + { 0x3000, 0x3000} /* F */, + { 0x3001, 0x303E} /* W */, { 0x3041, 0x4DB5} /* W */, + { 0x4E00, 0x9FA5} /* W */, { 0xA000, 0xA4C6} /* W */, + { 0xAC00, 0xD7A3} /* W */, { 0xF900, 0xFA6A} /* W */, + { 0xFE30, 0xFE6B} /* W */, + { 0xFF01, 0xFF60} /* F */, { 0xFFE0, 0xFFE6} /* F */, + { 0x20000, 0x2FFFD} /* W */, { 0x30000, 0x3FFFD} /* W */, + +}; + + static int +is_in_table(ch, table, tsize) + LWCHAR ch; + struct wchar_range table[]; + int tsize; +{ + int hi; + int lo; + + /* Binary search in the table. */ + if (ch < table[0].first) + return 0; + lo = 0; + hi = tsize - 1; + while (lo <= hi) + { + int mid = (lo + hi) / 2; + if (ch > table[mid].last) + lo = mid + 1; + else if (ch < table[mid].first) + hi = mid - 1; + else + return 1; + } + return 0; +} + +/* + * Is a character a UTF-8 composing character? + * If a composing character follows any char, the two combine into one glyph. + */ + public int +is_composing_char(ch) + LWCHAR ch; +{ + return is_in_table(ch, comp_table, (sizeof(comp_table) / sizeof(*comp_table))); +} + +/* + * Should this UTF-8 character be treated as binary? + */ + public int +is_ubin_char(ch) + LWCHAR ch; +{ + return is_in_table(ch, ubin_table, (sizeof(ubin_table) / sizeof(*ubin_table))); +} + +/* + * Is this a double width UTF-8 character? + */ + public int +is_wide_char(ch) + LWCHAR ch; +{ + return is_in_table(ch, wide_table, (sizeof(wide_table) / sizeof(*wide_table))); +} + +/* + * Is a character a UTF-8 combining character? + * A combining char acts like an ordinary char, but if it follows + * a specific char (not any char), the two combine into one glyph. + */ + public int +is_combining_char(ch1, ch2) + LWCHAR ch1; + LWCHAR ch2; +{ + /* The table is small; use linear search. */ + int i; + for (i = 0; i < sizeof(comb_table)/sizeof(*comb_table); i++) + { + if (ch1 == comb_table[i].first && + ch2 == comb_table[i].last) + return 1; + } + return 0; +} + diff --git a/commands/less/less/charset.h b/commands/less/less/charset.h new file mode 100644 index 000000000..237a36015 --- /dev/null +++ b/commands/less/less/charset.h @@ -0,0 +1,19 @@ +/* + * Copyright (C) 2005 Mark Nudelman + * + * You may distribute under the terms of either the GNU General Public + * License or the Less License, as specified in the README file. + * + * For more information about less, or for information on how to + * contact the author, see the README file. + */ + +#define IS_ASCII_OCTET(c) (((c) & 0x80) == 0) +#define IS_UTF8_TRAIL(c) (((c) & 0xC0) == 0x80) +#define IS_UTF8_LEAD2(c) (((c) & 0xE0) == 0xC0) +#define IS_UTF8_LEAD3(c) (((c) & 0xF0) == 0xE0) +#define IS_UTF8_LEAD4(c) (((c) & 0xF8) == 0xF0) +#define IS_UTF8_LEAD5(c) (((c) & 0xFC) == 0xF8) +#define IS_UTF8_LEAD6(c) (((c) & 0xFE) == 0xFC) +#define IS_UTF8_INVALID(c) (((c) & 0xFE) == 0xFE) +#define IS_UTF8_LEAD(c) (((c) & 0xC0) == 0xC0 && !IS_UTF8_INVALID(c)) diff --git a/commands/less/less/cmd.h b/commands/less/less/cmd.h new file mode 100644 index 000000000..8e71f0384 --- /dev/null +++ b/commands/less/less/cmd.h @@ -0,0 +1,131 @@ +/* + * Copyright (C) 1984-2004 Mark Nudelman + * + * You may distribute under the terms of either the GNU General Public + * License or the Less License, as specified in the README file. + * + * For more information about less, or for information on how to + * contact the author, see the README file. + */ + + +#define MAX_USERCMD 500 +#define MAX_CMDLEN 16 + +#define A_B_LINE 2 +#define A_B_SCREEN 3 +#define A_B_SCROLL 4 +#define A_B_SEARCH 5 +#define A_DIGIT 6 +#define A_DISP_OPTION 7 +#define A_DEBUG 8 +#define A_EXAMINE 9 +#define A_FIRSTCMD 10 +#define A_FREPAINT 11 +#define A_F_LINE 12 +#define A_F_SCREEN 13 +#define A_F_SCROLL 14 +#define A_F_SEARCH 15 +#define A_GOEND 16 +#define A_GOLINE 17 +#define A_GOMARK 18 +#define A_HELP 19 +#define A_NEXT_FILE 20 +#define A_PERCENT 21 +#define A_PREFIX 22 +#define A_PREV_FILE 23 +#define A_QUIT 24 +#define A_REPAINT 25 +#define A_SETMARK 26 +#define A_SHELL 27 +#define A_STAT 28 +#define A_FF_LINE 29 +#define A_BF_LINE 30 +#define A_VERSION 31 +#define A_VISUAL 32 +#define A_F_WINDOW 33 +#define A_B_WINDOW 34 +#define A_F_BRACKET 35 +#define A_B_BRACKET 36 +#define A_PIPE 37 +#define A_INDEX_FILE 38 +#define A_UNDO_SEARCH 39 +#define A_FF_SCREEN 40 +#define A_LSHIFT 41 +#define A_RSHIFT 42 +#define A_AGAIN_SEARCH 43 +#define A_T_AGAIN_SEARCH 44 +#define A_REVERSE_SEARCH 45 +#define A_T_REVERSE_SEARCH 46 +#define A_OPT_TOGGLE 47 +#define A_OPT_SET 48 +#define A_OPT_UNSET 49 +#define A_F_FOREVER 50 +#define A_GOPOS 51 +#define A_REMOVE_FILE 52 +#define A_NEXT_TAG 53 +#define A_PREV_TAG 54 + +#define A_INVALID 100 +#define A_NOACTION 101 +#define A_UINVALID 102 +#define A_END_LIST 103 +#define A_SPECIAL_KEY 104 + +#define A_SKIP 127 + +#define A_EXTRA 0200 + + +/* Line editting characters */ + +#define EC_BACKSPACE 1 +#define EC_LINEKILL 2 +#define EC_RIGHT 3 +#define EC_LEFT 4 +#define EC_W_LEFT 5 +#define EC_W_RIGHT 6 +#define EC_INSERT 7 +#define EC_DELETE 8 +#define EC_HOME 9 +#define EC_END 10 +#define EC_W_BACKSPACE 11 +#define EC_W_DELETE 12 +#define EC_UP 13 +#define EC_DOWN 14 +#define EC_EXPAND 15 +#define EC_F_COMPLETE 17 +#define EC_B_COMPLETE 18 +#define EC_LITERAL 19 + +#define EC_NOACTION 101 +#define EC_UINVALID 102 + +/* Flags for editchar() */ +#define EC_PEEK 01 +#define EC_NOHISTORY 02 +#define EC_NOCOMPLETE 04 +#define EC_NORIGHTLEFT 010 + +/* Environment variable stuff */ +#define EV_OK 01 + +/* Special keys (keys which output different strings on different terminals) */ +#define SK_SPECIAL_KEY CONTROL('K') +#define SK_RIGHT_ARROW 1 +#define SK_LEFT_ARROW 2 +#define SK_UP_ARROW 3 +#define SK_DOWN_ARROW 4 +#define SK_PAGE_UP 5 +#define SK_PAGE_DOWN 6 +#define SK_HOME 7 +#define SK_END 8 +#define SK_DELETE 9 +#define SK_INSERT 10 +#define SK_CTL_LEFT_ARROW 11 +#define SK_CTL_RIGHT_ARROW 12 +#define SK_CTL_DELETE 13 +#define SK_F1 14 +#define SK_BACKTAB 15 +#define SK_CTL_BACKSPACE 16 +#define SK_CONTROL_K 40 diff --git a/commands/less/less/cmdbuf.c b/commands/less/less/cmdbuf.c new file mode 100644 index 000000000..06a7764e1 --- /dev/null +++ b/commands/less/less/cmdbuf.c @@ -0,0 +1,1470 @@ +/* $NetBSD: cmdbuf.c,v 1.7 2006/10/26 01:33:08 mrg Exp $ */ + +/* + * Copyright (C) 1984-2005 Mark Nudelman + * + * You may distribute under the terms of either the GNU General Public + * License or the Less License, as specified in the README file. + * + * For more information about less, or for information on how to + * contact the author, see the README file. + */ + + +/* + * Functions which manipulate the command buffer. + * Used only by command() and related functions. + */ + +#include "less.h" +#include "cmd.h" +#include "charset.h" +#if HAVE_STAT +#include +#endif + +extern int sc_width; +extern int utf_mode; + +static char cmdbuf[CMDBUF_SIZE]; /* Buffer for holding a multi-char command */ +static int cmd_col; /* Current column of the cursor */ +static int prompt_col; /* Column of cursor just after prompt */ +static char *cp; /* Pointer into cmdbuf */ +static int cmd_offset; /* Index into cmdbuf of first displayed char */ +static int literal; /* Next input char should not be interpreted */ + +#if TAB_COMPLETE_FILENAME +static int cmd_complete __P((int)); +/* + * These variables are statics used by cmd_complete. + */ +static int in_completion = 0; +static char *tk_text; +static char *tk_original; +static char *tk_ipoint; +static char *tk_trial; +static struct textlist tk_tlist; +#endif + +static void cmd_repaint __P((char *)); +static void cmd_home __P((void)); +static void cmd_lshift __P((void)); +static void cmd_rshift __P((void)); +static int cmd_right __P((void)); +static int cmd_left __P((void)); +static int cmd_ichar __P((char *, int)); +static int cmd_erase __P((void)); +static int cmd_delete __P((void)); +static int cmd_werase __P((void)); +static int cmd_wdelete __P((void)); +static int cmd_kill __P((void)); +static int cmd_updown __P((int)); +static int cmd_edit __P((int)); +static int cmd_istr __P((char *)); +static char *delimit_word __P((void)); +static void init_compl __P((void)); +static char *next_compl __P((int, char *)); + +#if SPACES_IN_FILENAMES +public char openquote = '"'; +public char closequote = '"'; +#endif + +#if CMD_HISTORY + +/* History file */ +#define HISTFILE_FIRST_LINE ".less-history-file:" +#define HISTFILE_SEARCH_SECTION ".search" +#define HISTFILE_SHELL_SECTION ".shell" + +/* + * A mlist structure represents a command history. + */ +struct mlist +{ + struct mlist *next; + struct mlist *prev; + struct mlist *curr_mp; + char *string; +}; + +/* + * These are the various command histories that exist. + */ +struct mlist mlist_search = + { &mlist_search, &mlist_search, &mlist_search, NULL }; +public void * constant ml_search = (void *) &mlist_search; + +struct mlist mlist_examine = + { &mlist_examine, &mlist_examine, &mlist_examine, NULL }; +public void * constant ml_examine = (void *) &mlist_examine; + +#if SHELL_ESCAPE || PIPEC +struct mlist mlist_shell = + { &mlist_shell, &mlist_shell, &mlist_shell, NULL }; +public void * constant ml_shell = (void *) &mlist_shell; +#endif + +#else /* CMD_HISTORY */ + +/* If CMD_HISTORY is off, these are just flags. */ +public void * constant ml_search = (void *)1; +public void * constant ml_examine = (void *)2; +#if SHELL_ESCAPE || PIPEC +public void * constant ml_shell = (void *)3; +#endif + +#endif /* CMD_HISTORY */ + +/* + * History for the current command. + */ +static struct mlist *curr_mlist = NULL; +static int curr_cmdflags; + +static char cmd_mbc_buf[MAX_UTF_CHAR_LEN]; +static int cmd_mbc_buf_len; +static int cmd_mbc_buf_index; + + +/* + * Reset command buffer (to empty). + */ + public void +cmd_reset() +{ + cp = cmdbuf; + *cp = '\0'; + cmd_col = 0; + cmd_offset = 0; + literal = 0; + cmd_mbc_buf_len = 0; +} + +/* + * Clear command line on display. + */ + public void +clear_cmd() +{ + clear_bot(); + cmd_col = prompt_col = 0; + cmd_mbc_buf_len = 0; +} + +/* + * Display a string, usually as a prompt for input into the command buffer. + */ + public void +cmd_putstr(s) + char *s; +{ + LWCHAR prev_ch = 0; + LWCHAR ch; + char *endline = s + strlen(s); + while (*s != '\0') + { + char *ns = s; + ch = step_char(&ns, +1, endline); + while (s < ns) + putchr(*s++); + if (!utf_mode) + { + cmd_col++; + prompt_col++; + } else if (!is_composing_char(ch) && + !is_combining_char(prev_ch, ch)) + { + int width = is_wide_char(ch) ? 2 : 1; + cmd_col += width; + prompt_col += width; + } + prev_ch = ch; + } +} + +/* + * How many characters are in the command buffer? + */ + public int +len_cmdbuf() +{ + char *s = cmdbuf; + char *endline = s + strlen(s); + int len = 0; + + while (*s != '\0') + { + step_char(&s, +1, endline); + len++; + } + return (len); +} + +/* + * Common part of cmd_step_right() and cmd_step_left(). + */ + static char * +cmd_step_common(p, ch, len, pwidth, bswidth) + char *p; + LWCHAR ch; + int len; + int *pwidth; + int *bswidth; +{ + char *pr; + + if (len == 1) + { + pr = prchar((int) ch); + if (pwidth != NULL || bswidth != NULL) + { + int len = strlen(pr); + if (pwidth != NULL) + *pwidth = len; + if (bswidth != NULL) + *bswidth = len; + } + } else + { + pr = prutfchar(ch); + if (pwidth != NULL || bswidth != NULL) + { + if (is_composing_char(ch)) + { + if (pwidth != NULL) + *pwidth = 0; + if (bswidth != NULL) + *bswidth = 0; + } else if (is_ubin_char(ch)) + { + int len = strlen(pr); + if (pwidth != NULL) + *pwidth = len; + if (bswidth != NULL) + *bswidth = len; + } else + { + LWCHAR prev_ch = step_char(&p, -1, cmdbuf); + if (is_combining_char(prev_ch, ch)) + { + if (pwidth != NULL) + *pwidth = 0; + if (bswidth != NULL) + *bswidth = 0; + } else + { + if (pwidth != NULL) + *pwidth = is_wide_char(ch) + ? 2 + : 1; + if (bswidth != NULL) + *bswidth = 1; + } + } + } + } + + return (pr); +} + +/* + * Step a pointer one character right in the command buffer. + */ + static char * +cmd_step_right(pp, pwidth, bswidth) + char **pp; + int *pwidth; + int *bswidth; +{ + char *p = *pp; + LWCHAR ch = step_char(pp, +1, p + strlen(p)); + + return cmd_step_common(p, ch, *pp - p, pwidth, bswidth); +} + +/* + * Step a pointer one character left in the command buffer. + */ + static char * +cmd_step_left(pp, pwidth, bswidth) + char **pp; + int *pwidth; + int *bswidth; +{ + char *p = *pp; + LWCHAR ch = step_char(pp, -1, cmdbuf); + + return cmd_step_common(*pp, ch, p - *pp, pwidth, bswidth); +} + +/* + * Repaint the line from cp onwards. + * Then position the cursor just after the char old_cp (a pointer into cmdbuf). + */ + static void +cmd_repaint(old_cp) + char *old_cp; +{ + /* + * Repaint the line from the current position. + */ + clear_eol(); + while (*cp != '\0') + { + char *np = cp; + int width; + char *pr = cmd_step_right(&np, &width, NULL); + if (cmd_col + width >= sc_width) + break; + cp = np; + putstr(pr); + cmd_col += width; + } + while (*cp != '\0') + { + char *np = cp; + int width; + char *pr = cmd_step_right(&np, &width, NULL); + if (width > 0) + break; + cp = np; + putstr(pr); + } + + /* + * Back up the cursor to the correct position. + */ + while (cp > old_cp) + cmd_left(); +} + +/* + * Put the cursor at "home" (just after the prompt), + * and set cp to the corresponding char in cmdbuf. + */ + static void +cmd_home() +{ + while (cmd_col > prompt_col) + { + int width, bswidth; + + cmd_step_left(&cp, &width, &bswidth); + while (bswidth-- > 0) + putbs(); + cmd_col -= width; + } + + cp = &cmdbuf[cmd_offset]; +} + +/* + * Shift the cmdbuf display left a half-screen. + */ + static void +cmd_lshift() +{ + char *s; + char *save_cp; + int cols; + + /* + * Start at the first displayed char, count how far to the + * right we'd have to move to reach the center of the screen. + */ + s = cmdbuf + cmd_offset; + cols = 0; + while (cols < (sc_width - prompt_col) / 2 && *s != '\0') + { + int width; + cmd_step_right(&s, &width, NULL); + cols += width; + } + while (*s != '\0') + { + int width; + char *ns = s; + cmd_step_right(&ns, &width, NULL); + if (width > 0) + break; + s = ns; + } + + cmd_offset = s - cmdbuf; + save_cp = cp; + cmd_home(); + cmd_repaint(save_cp); +} + +/* + * Shift the cmdbuf display right a half-screen. + */ + static void +cmd_rshift() +{ + char *s; + char *save_cp; + int cols; + + /* + * Start at the first displayed char, count how far to the + * left we'd have to move to traverse a half-screen width + * of displayed characters. + */ + s = cmdbuf + cmd_offset; + cols = 0; + while (cols < (sc_width - prompt_col) / 2 && s > cmdbuf) + { + int width; + cmd_step_left(&s, &width, NULL); + cols += width; + } + + cmd_offset = s - cmdbuf; + save_cp = cp; + cmd_home(); + cmd_repaint(save_cp); +} + +/* + * Move cursor right one character. + */ + static int +cmd_right() +{ + char *pr; + char *ncp; + int width; + + if (*cp == '\0') + { + /* Already at the end of the line. */ + return (CC_OK); + } + ncp = cp; + pr = cmd_step_right(&ncp, &width, NULL); + if (cmd_col + width >= sc_width) + cmd_lshift(); + else if (cmd_col + width == sc_width - 1 && cp[1] != '\0') + cmd_lshift(); + cp = ncp; + cmd_col += width; + putstr(pr); + while (*cp != '\0') + { + pr = cmd_step_right(&ncp, &width, NULL); + if (width > 0) + break; + putstr(pr); + cp = ncp; + } + return (CC_OK); +} + +/* + * Move cursor left one character. + */ + static int +cmd_left() +{ + char *ncp; + int width, bswidth; + + if (cp <= cmdbuf) + { + /* Already at the beginning of the line */ + return (CC_OK); + } + ncp = cp; + while (ncp > cmdbuf) + { + cmd_step_left(&ncp, &width, &bswidth); + if (width > 0) + break; + } + if (cmd_col < prompt_col + width) + cmd_rshift(); + cp = ncp; + cmd_col -= width; + while (bswidth-- > 0) + putbs(); + return (CC_OK); +} + +/* + * Insert a char into the command buffer, at the current position. + */ + static int +cmd_ichar(cs, clen) + char *cs; + int clen; +{ + char *s; + + if (strlen(cmdbuf) + clen >= sizeof(cmdbuf)-1) + { + /* No room in the command buffer for another char. */ + bell(); + return (CC_ERROR); + } + + /* + * Make room for the new character (shift the tail of the buffer right). + */ + for (s = &cmdbuf[strlen(cmdbuf)]; s >= cp; s--) + s[clen] = s[0]; + /* + * Insert the character into the buffer. + */ + for (s = cp; s < cp + clen; s++) + *s = *cs++; + /* + * Reprint the tail of the line from the inserted char. + */ + cmd_repaint(cp); + cmd_right(); + return (CC_OK); +} + +/* + * Backspace in the command buffer. + * Delete the char to the left of the cursor. + */ + static int +cmd_erase() +{ + register char *s; + int clen; + + if (cp == cmdbuf) + { + /* + * Backspace past beginning of the buffer: + * this usually means abort the command. + */ + return (CC_QUIT); + } + /* + * Move cursor left (to the char being erased). + */ + s = cp; + cmd_left(); + clen = s - cp; + + /* + * Remove the char from the buffer (shift the buffer left). + */ + for (s = cp; ; s++) + { + s[0] = s[clen]; + if (s[0] == '\0') + break; + } + + /* + * Repaint the buffer after the erased char. + */ + cmd_repaint(cp); + + /* + * We say that erasing the entire command string causes us + * to abort the current command, if CF_QUIT_ON_ERASE is set. + */ + if ((curr_cmdflags & CF_QUIT_ON_ERASE) && cp == cmdbuf && *cp == '\0') + return (CC_QUIT); + return (CC_OK); +} + +/* + * Delete the char under the cursor. + */ + static int +cmd_delete() +{ + if (*cp == '\0') + { + /* At end of string; there is no char under the cursor. */ + return (CC_OK); + } + /* + * Move right, then use cmd_erase. + */ + cmd_right(); + cmd_erase(); + return (CC_OK); +} + +/* + * Delete the "word" to the left of the cursor. + */ + static int +cmd_werase() +{ + if (cp > cmdbuf && cp[-1] == ' ') + { + /* + * If the char left of cursor is a space, + * erase all the spaces left of cursor (to the first non-space). + */ + while (cp > cmdbuf && cp[-1] == ' ') + (void) cmd_erase(); + } else + { + /* + * If the char left of cursor is not a space, + * erase all the nonspaces left of cursor (the whole "word"). + */ + while (cp > cmdbuf && cp[-1] != ' ') + (void) cmd_erase(); + } + return (CC_OK); +} + +/* + * Delete the "word" under the cursor. + */ + static int +cmd_wdelete() +{ + if (*cp == ' ') + { + /* + * If the char under the cursor is a space, + * delete it and all the spaces right of cursor. + */ + while (*cp == ' ') + (void) cmd_delete(); + } else + { + /* + * If the char under the cursor is not a space, + * delete it and all nonspaces right of cursor (the whole word). + */ + while (*cp != ' ' && *cp != '\0') + (void) cmd_delete(); + } + return (CC_OK); +} + +/* + * Delete all chars in the command buffer. + */ + static int +cmd_kill() +{ + if (cmdbuf[0] == '\0') + { + /* Buffer is already empty; abort the current command. */ + return (CC_QUIT); + } + cmd_offset = 0; + cmd_home(); + *cp = '\0'; + cmd_repaint(cp); + + /* + * We say that erasing the entire command string causes us + * to abort the current command, if CF_QUIT_ON_ERASE is set. + */ + if (curr_cmdflags & CF_QUIT_ON_ERASE) + return (CC_QUIT); + return (CC_OK); +} + +/* + * Select an mlist structure to be the current command history. + */ + public void +set_mlist(mlist, cmdflags) + void *mlist; + int cmdflags; +{ + curr_mlist = (struct mlist *) mlist; + curr_cmdflags = cmdflags; + + /* Make sure the next up-arrow moves to the last string in the mlist. */ + if (curr_mlist != NULL) + curr_mlist->curr_mp = curr_mlist; +} + +#if CMD_HISTORY +/* + * Move up or down in the currently selected command history list. + */ + static int +cmd_updown(action) + int action; +{ + char *s; + + if (curr_mlist == NULL) + { + /* + * The current command has no history list. + */ + bell(); + return (CC_OK); + } + cmd_home(); + clear_eol(); + /* + * Move curr_mp to the next/prev entry. + */ + if (action == EC_UP) + curr_mlist->curr_mp = curr_mlist->curr_mp->prev; + else + curr_mlist->curr_mp = curr_mlist->curr_mp->next; + /* + * Copy the entry into cmdbuf and echo it on the screen. + */ + s = curr_mlist->curr_mp->string; + if (s == NULL) + s = ""; + strcpy(cmdbuf, s); + for (cp = cmdbuf; *cp != '\0'; ) + cmd_right(); + return (CC_OK); +} +#endif + +/* + * Add a string to a history list. + */ + public void +cmd_addhist(mlist, cmd) + struct mlist *mlist; + char *cmd; +{ +#if CMD_HISTORY + struct mlist *ml; + + /* + * Don't save a trivial command. + */ + if (strlen(cmd) == 0) + return; + + /* + * Save the command unless it's a duplicate of the + * last command in the history. + */ + ml = mlist->prev; + if (ml == mlist || strcmp(ml->string, cmd) != 0) + { + /* + * Did not find command in history. + * Save the command and put it at the end of the history list. + */ + ml = (struct mlist *) ecalloc(1, sizeof(struct mlist)); + ml->string = save(cmd); + ml->next = mlist; + ml->prev = mlist->prev; + mlist->prev->next = ml; + mlist->prev = ml; + } + /* + * Point to the cmd just after the just-accepted command. + * Thus, an UPARROW will always retrieve the previous command. + */ + mlist->curr_mp = ml->next; +#endif +} + +/* + * Accept the command in the command buffer. + * Add it to the currently selected history list. + */ + public void +cmd_accept() +{ +#if CMD_HISTORY + /* + * Nothing to do if there is no currently selected history list. + */ + if (curr_mlist == NULL) + return; + cmd_addhist(curr_mlist, cmdbuf); +#endif +} + +/* + * Try to perform a line-edit function on the command buffer, + * using a specified char as a line-editing command. + * Returns: + * CC_PASS The char does not invoke a line edit function. + * CC_OK Line edit function done. + * CC_QUIT The char requests the current command to be aborted. + */ + static int +cmd_edit(c) + int c; +{ + int action; + int flags; + +#if TAB_COMPLETE_FILENAME +#define not_in_completion() in_completion = 0 +#else +#define not_in_completion() +#endif + + /* + * See if the char is indeed a line-editing command. + */ + flags = 0; +#if CMD_HISTORY + if (curr_mlist == NULL) + /* + * No current history; don't accept history manipulation cmds. + */ + flags |= EC_NOHISTORY; +#endif +#if TAB_COMPLETE_FILENAME + if (curr_mlist == ml_search) + /* + * In a search command; don't accept file-completion cmds. + */ + flags |= EC_NOCOMPLETE; +#endif + + action = editchar(c, flags); + + switch (action) + { + case EC_RIGHT: + not_in_completion(); + return (cmd_right()); + case EC_LEFT: + not_in_completion(); + return (cmd_left()); + case EC_W_RIGHT: + not_in_completion(); + while (*cp != '\0' && *cp != ' ') + cmd_right(); + while (*cp == ' ') + cmd_right(); + return (CC_OK); + case EC_W_LEFT: + not_in_completion(); + while (cp > cmdbuf && cp[-1] == ' ') + cmd_left(); + while (cp > cmdbuf && cp[-1] != ' ') + cmd_left(); + return (CC_OK); + case EC_HOME: + not_in_completion(); + cmd_offset = 0; + cmd_home(); + cmd_repaint(cp); + return (CC_OK); + case EC_END: + not_in_completion(); + while (*cp != '\0') + cmd_right(); + return (CC_OK); + case EC_INSERT: + not_in_completion(); + return (CC_OK); + case EC_BACKSPACE: + not_in_completion(); + return (cmd_erase()); + case EC_LINEKILL: + not_in_completion(); + return (cmd_kill()); + case EC_W_BACKSPACE: + not_in_completion(); + return (cmd_werase()); + case EC_DELETE: + not_in_completion(); + return (cmd_delete()); + case EC_W_DELETE: + not_in_completion(); + return (cmd_wdelete()); + case EC_LITERAL: + literal = 1; + return (CC_OK); +#if CMD_HISTORY + case EC_UP: + case EC_DOWN: + not_in_completion(); + return (cmd_updown(action)); +#endif +#if TAB_COMPLETE_FILENAME + case EC_F_COMPLETE: + case EC_B_COMPLETE: + case EC_EXPAND: + return (cmd_complete(action)); +#endif + case EC_NOACTION: + return (CC_OK); + default: + not_in_completion(); + return (CC_PASS); + } +} + +#if TAB_COMPLETE_FILENAME +/* + * Insert a string into the command buffer, at the current position. + */ + static int +cmd_istr(str) + char *str; +{ + char *s; + int action; + char *endline = str + strlen(str); + + for (s = str; *s != '\0'; ) + { + char *os = s; + step_char(&s, +1, endline); + action = cmd_ichar(os, s - os); + if (action != CC_OK) + { + bell(); + return (action); + } + } + return (CC_OK); +} + +/* + * Find the beginning and end of the "current" word. + * This is the word which the cursor (cp) is inside or at the end of. + * Return pointer to the beginning of the word and put the + * cursor at the end of the word. + */ + static char * +delimit_word() +{ + char *word = NULL; +#if SPACES_IN_FILENAMES + char *p; + int delim_quoted = 0; + int meta_quoted = 0; + char *esc = get_meta_escape(); + int esclen = strlen(esc); +#endif + + /* + * Move cursor to end of word. + */ + if (*cp != ' ' && *cp != '\0') + { + /* + * Cursor is on a nonspace. + * Move cursor right to the next space. + */ + while (*cp != ' ' && *cp != '\0') + cmd_right(); + } else if (cp > cmdbuf && cp[-1] != ' ') + { + /* + * Cursor is on a space, and char to the left is a nonspace. + * We're already at the end of the word. + */ + ; +#if 0 + } else + { + /* + * Cursor is on a space and char to the left is a space. + * Huh? There's no word here. + */ + return (NULL); +#endif + } + /* + * Find the beginning of the word which the cursor is in. + */ + if (cp == cmdbuf) + return (NULL); +#if SPACES_IN_FILENAMES + /* + * If we have an unbalanced quote (that is, an open quote + * without a corresponding close quote), we return everything + * from the open quote, including spaces. + */ + for (word = cmdbuf; word < cp; word++) + if (*word != ' ') + break; + if (word >= cp) + return (cp); + for (p = cmdbuf; p < cp; p++) + { + if (meta_quoted) + { + meta_quoted = 0; + } else if (esclen > 0 && p + esclen < cp && + strncmp(p, esc, esclen) == 0) + { + meta_quoted = 1; + p += esclen - 1; + } else if (delim_quoted) + { + if (*p == closequote) + delim_quoted = 0; + } else /* (!delim_quoted) */ + { + if (*p == openquote) + delim_quoted = 1; + else if (*p == ' ') + word = p+1; + } + } +#endif + return (word); +} + +/* + * Set things up to enter completion mode. + * Expand the word under the cursor into a list of filenames + * which start with that word, and set tk_text to that list. + */ + static void +init_compl() +{ + char *word; + char c; + + /* + * Get rid of any previous tk_text. + */ + if (tk_text != NULL) + { + free(tk_text); + tk_text = NULL; + } + /* + * Find the original (uncompleted) word in the command buffer. + */ + word = delimit_word(); + if (word == NULL) + return; + /* + * Set the insertion point to the point in the command buffer + * where the original (uncompleted) word now sits. + */ + tk_ipoint = word; + /* + * Save the original (uncompleted) word + */ + if (tk_original != NULL) + free(tk_original); + tk_original = (char *) ecalloc(cp-word+1, sizeof(char)); + strncpy(tk_original, word, cp-word); + /* + * Get the expanded filename. + * This may result in a single filename, or + * a blank-separated list of filenames. + */ + c = *cp; + *cp = '\0'; + if (*word != openquote) + { + tk_text = fcomplete(word); + } else + { + char *qword = shell_quote(word+1); + if (qword == NULL) + tk_text = fcomplete(word+1); + else + { + tk_text = fcomplete(qword); + free(qword); + } + } + *cp = c; +} + +/* + * Return the next word in the current completion list. + */ + static char * +next_compl(action, prev) + int action; + char *prev; +{ + switch (action) + { + case EC_F_COMPLETE: + return (forw_textlist(&tk_tlist, prev)); + case EC_B_COMPLETE: + return (back_textlist(&tk_tlist, prev)); + } + /* Cannot happen */ + return ("?"); +} + +/* + * Complete the filename before (or under) the cursor. + * cmd_complete may be called multiple times. The global in_completion + * remembers whether this call is the first time (create the list), + * or a subsequent time (step thru the list). + */ + static int +cmd_complete(action) + int action; +{ + char *s; + + if (!in_completion || action == EC_EXPAND) + { + /* + * Expand the word under the cursor and + * use the first word in the expansion + * (or the entire expansion if we're doing EC_EXPAND). + */ + init_compl(); + if (tk_text == NULL) + { + bell(); + return (CC_OK); + } + if (action == EC_EXPAND) + { + /* + * Use the whole list. + */ + tk_trial = tk_text; + } else + { + /* + * Use the first filename in the list. + */ + in_completion = 1; + init_textlist(&tk_tlist, tk_text); + tk_trial = next_compl(action, (char*)NULL); + } + } else + { + /* + * We already have a completion list. + * Use the next/previous filename from the list. + */ + tk_trial = next_compl(action, tk_trial); + } + + /* + * Remove the original word, or the previous trial completion. + */ + while (cp > tk_ipoint) + (void) cmd_erase(); + + if (tk_trial == NULL) + { + /* + * There are no more trial completions. + * Insert the original (uncompleted) filename. + */ + in_completion = 0; + if (cmd_istr(tk_original) != CC_OK) + goto fail; + } else + { + /* + * Insert trial completion. + */ + if (cmd_istr(tk_trial) != CC_OK) + goto fail; + /* + * If it is a directory, append a slash. + */ + if (is_dir(tk_trial)) + { + if (cp > cmdbuf && cp[-1] == closequote) + (void) cmd_erase(); + s = lgetenv("LESSSEPARATOR"); + if (s == NULL) + s = PATHNAME_SEP; + if (cmd_istr(s) != CC_OK) + goto fail; + } + } + + return (CC_OK); + +fail: + in_completion = 0; + bell(); + return (CC_OK); +} + +#endif /* TAB_COMPLETE_FILENAME */ + +/* + * Process a single character of a multi-character command, such as + * a number, or the pattern of a search command. + * Returns: + * CC_OK The char was accepted. + * CC_QUIT The char requests the command to be aborted. + * CC_ERROR The char could not be accepted due to an error. + */ + public int +cmd_char(c) + int c; +{ + int action; + int len; + + if (!utf_mode) + { + cmd_mbc_buf[0] = c; + len = 1; + } else + { + /* Perform strict validation in all possible cases. */ + if (cmd_mbc_buf_len == 0) + { + retry: + cmd_mbc_buf_index = 1; + *cmd_mbc_buf = c; + if (IS_ASCII_OCTET(c)) + cmd_mbc_buf_len = 1; + else if (IS_UTF8_LEAD(c)) + { + cmd_mbc_buf_len = utf_len(c); + return (CC_OK); + } else + { + /* UTF8_INVALID or stray UTF8_TRAIL */ + bell(); + return (CC_ERROR); + } + } else if (IS_UTF8_TRAIL(c)) + { + cmd_mbc_buf[cmd_mbc_buf_index++] = c; + if (cmd_mbc_buf_index < cmd_mbc_buf_len) + return (CC_OK); + if (!is_utf8_well_formed(cmd_mbc_buf)) + { + /* complete, but not well formed (non-shortest form), sequence */ + cmd_mbc_buf_len = 0; + bell(); + return (CC_ERROR); + } + } else + { + /* Flush incomplete (truncated) sequence. */ + cmd_mbc_buf_len = 0; + bell(); + /* Handle new char. */ + goto retry; + } + + len = cmd_mbc_buf_len; + cmd_mbc_buf_len = 0; + } + + if (literal) + { + /* + * Insert the char, even if it is a line-editing char. + */ + literal = 0; + return (cmd_ichar(cmd_mbc_buf, len)); + } + + /* + * See if it is a line-editing character. + */ + if (in_mca() && len == 1) + { + action = cmd_edit(c); + switch (action) + { + case CC_OK: + case CC_QUIT: + return (action); + case CC_PASS: + break; + } + } + + /* + * Insert the char into the command buffer. + */ + return (cmd_ichar(cmd_mbc_buf, len)); +} + +/* + * Return the number currently in the command buffer. + */ + public LINENUM +cmd_int() +{ + register char *p; + LINENUM n = 0; + + for (p = cmdbuf; *p != '\0'; p++) + n = (10 * n) + (*p - '0'); + return (n); +} + +/* + * Return a pointer to the command buffer. + */ + public char * +get_cmdbuf() +{ + return (cmdbuf); +} + +#if CMD_HISTORY +/* + * Get the name of the history file. + */ + static char * +histfile_name() +{ + char *home; + char *name; + int len; + + /* See if filename is explicitly specified by $LESSHISTFILE. */ + name = lgetenv("LESSHISTFILE"); + if (name != NULL && *name != '\0') + { + if (strcmp(name, "-") == 0) + /* $LESSHISTFILE == "-" means don't use a history file. */ + return (NULL); + return (save(name)); + } + + /* Otherwise, file is in $HOME. */ + home = lgetenv("HOME"); + if (home == NULL || *home == '\0') + { +#if OS2 + home = lgetenv("INIT"); + if (home == NULL || *home == '\0') +#endif + return (NULL); + } + len = strlen(home) + strlen(LESSHISTFILE) + 2; + name = (char *) ecalloc(len, sizeof(char)); + SNPRINTF2(name, len, "%s/%s", home, LESSHISTFILE); + return (name); +} +#endif /* CMD_HISTORY */ + +/* + * Initialize history from a .lesshist file. + */ + public void +init_cmdhist() +{ +#if CMD_HISTORY + struct mlist *ml = NULL; + char line[CMDBUF_SIZE]; + char *filename; + FILE *f; + char *p; + + filename = histfile_name(); + if (filename == NULL) + return; + f = fopen(filename, "r"); + free(filename); + if (f == NULL) + return; + if (fgets(line, sizeof(line), f) == NULL || + strncmp(line, HISTFILE_FIRST_LINE, strlen(HISTFILE_FIRST_LINE)) != 0) + { + fclose(f); + return; + } + while (fgets(line, sizeof(line), f) != NULL) + { + for (p = line; *p != '\0'; p++) + { + if (*p == '\n' || *p == '\r') + { + *p = '\0'; + break; + } + } + if (strcmp(line, HISTFILE_SEARCH_SECTION) == 0) + ml = &mlist_search; +#if SHELL_ESCAPE || PIPEC + else if (strcmp(line, HISTFILE_SHELL_SECTION) == 0) + ml = &mlist_shell; +#endif + else if (*line == '"') + { + if (ml != NULL) + cmd_addhist(ml, line+1); + } + } + fclose(f); +#endif /* CMD_HISTORY */ +} + +/* + * + */ +#if CMD_HISTORY + static void +save_mlist(ml, f) + struct mlist *ml; + FILE *f; +{ + int histsize = 0; + int n; + char *s; + + s = lgetenv("LESSHISTSIZE"); + if (s != NULL) + histsize = atoi(s); + if (histsize == 0) + histsize = 100; + + ml = ml->prev; + for (n = 0; n < histsize; n++) + { + if (ml->string == NULL) + break; + ml = ml->prev; + } + for (ml = ml->next; ml->string != NULL; ml = ml->next) + fprintf(f, "\"%s\n", ml->string); +} +#endif /* CMD_HISTORY */ + +/* + * + */ + public void +save_cmdhist() +{ +#if CMD_HISTORY + char *filename; + FILE *f; + + filename = histfile_name(); + if (filename == NULL) + return; + f = fopen(filename, "w"); + free(filename); + if (f == NULL) + return; +#if HAVE_FCHMOD + /* Make history file readable only by owner. */ + fchmod(fileno(f), 0600); +#endif + + fprintf(f, "%s\n", HISTFILE_FIRST_LINE); + + fprintf(f, "%s\n", HISTFILE_SEARCH_SECTION); + save_mlist(&mlist_search, f); + +#if SHELL_ESCAPE || PIPEC + fprintf(f, "%s\n", HISTFILE_SHELL_SECTION); + save_mlist(&mlist_shell, f); +#endif + + fclose(f); +#endif /* CMD_HISTORY */ +} diff --git a/commands/less/less/command.c b/commands/less/less/command.c new file mode 100644 index 000000000..042ce18fb --- /dev/null +++ b/commands/less/less/command.c @@ -0,0 +1,1661 @@ +/* $NetBSD: command.c,v 1.14 2008/02/16 07:20:54 matt Exp $ */ + +/* + * Copyright (C) 1984-2005 Mark Nudelman + * + * You may distribute under the terms of either the GNU General Public + * License or the Less License, as specified in the README file. + * + * For more information about less, or for information on how to + * contact the author, see the README file. + */ + + +/* + * User-level command processor. + */ + +#include "less.h" +#if MSDOS_COMPILER==WIN32C +#include +#endif +#include "position.h" +#include "option.h" +#include "cmd.h" + +extern int erase_char, erase2_char, kill_char; +extern int sigs; +extern int quit_at_eof; +extern int quit_if_one_screen; +extern int squished; +extern int hit_eof; +extern int sc_width; +extern int sc_height; +extern int swindow; +extern int jump_sline; +extern int quitting; +extern int wscroll; +extern int top_scroll; +extern int ignore_eoi; +extern int secure; +extern int hshift; +extern int show_attn; +extern int more_mode; +extern char *every_first_cmd; +extern char *curr_altfilename; +extern char version[]; +extern struct scrpos initial_scrpos; +extern IFILE curr_ifile; +extern void *constant ml_search; +extern void *constant ml_examine; +#if SHELL_ESCAPE || PIPEC +extern void *constant ml_shell; +#endif +#if EDITOR +extern char *editor; +extern char *editproto; +#endif +extern int screen_trashed; /* The screen has been overwritten */ +extern int shift_count; +extern int be_helpful; + +public int helpprompt; + +static char ungot[UNGOT_SIZE]; +static char *ungotp = NULL; +#if SHELL_ESCAPE +static char *shellcmd = NULL; /* For holding last shell command for "!!" */ +#endif +static int mca; /* The multicharacter command (action) */ +static int search_type; /* The previous type of search */ +static LINENUM number; /* The number typed by the user */ +static char optchar; +static int optflag; +static int optgetname; +static POSITION bottompos; +static int save_hshift; +#if PIPEC +static char pipec; +#endif + +static void cmd_exec __P((void)); +static void start_mca __P((int, char *, constant void *, int)); +static void mca_search __P((void)); +static void exec_mca __P((void)); +static int mca_char __P((int)); +static void make_display __P((void)); +static void prompt __P((void)); +static void multi_search __P((char *, int)); + +/* + * Move the cursor to lower left before executing a command. + * This looks nicer if the command takes a long time before + * updating the screen. + */ + static void +cmd_exec() +{ + clear_attn(); + lower_left(); + flush(); +} + +/* + * Set up the display to start a new multi-character command. + */ + static void +start_mca(action, prompt, mlist, cmdflags) + int action; + char *prompt; + constant void *mlist; + int cmdflags; +{ + mca = action; + clear_cmd(); + cmd_putstr(prompt); + set_mlist(mlist, cmdflags); +} + + public int +in_mca() +{ + return (mca != 0 && mca != A_PREFIX); +} + +/* + * Set up the display to start a new search command. + */ + static void +mca_search() +{ + if (search_type & SRCH_FORW) + mca = A_F_SEARCH; + else + mca = A_B_SEARCH; + + clear_cmd(); + + if (search_type & SRCH_NO_MATCH) + cmd_putstr("Non-match "); + if (search_type & SRCH_FIRST_FILE) + cmd_putstr("First-file "); + if (search_type & SRCH_PAST_EOF) + cmd_putstr("EOF-ignore "); + if (search_type & SRCH_NO_MOVE) + cmd_putstr("Keep-pos "); + if (search_type & SRCH_NO_REGEX) + cmd_putstr("Regex-off "); + + if (search_type & SRCH_FORW) + cmd_putstr("/"); + else + cmd_putstr("?"); + set_mlist(ml_search, 0); +} + +/* + * Set up the display to start a new toggle-option command. + */ + static void +mca_opt_toggle() +{ + int no_prompt; + int flag; + char *dash; + + no_prompt = (optflag & OPT_NO_PROMPT); + flag = (optflag & ~OPT_NO_PROMPT); + dash = (flag == OPT_NO_TOGGLE) ? "_" : "-"; + + mca = A_OPT_TOGGLE; + clear_cmd(); + cmd_putstr(dash); + if (optgetname) + cmd_putstr(dash); + if (no_prompt) + cmd_putstr("(P)"); + switch (flag) + { + case OPT_UNSET: + cmd_putstr("+"); + break; + case OPT_SET: + cmd_putstr("!"); + break; + } + set_mlist(NULL, 0); +} + +/* + * Execute a multicharacter command. + */ + static void +exec_mca() +{ + register char *cbuf; + + cmd_exec(); + cbuf = get_cmdbuf(); + + switch (mca) + { + case A_F_SEARCH: + case A_B_SEARCH: + multi_search(cbuf, (int) number); + break; + case A_FIRSTCMD: + /* + * Skip leading spaces or + signs in the string. + */ + while (*cbuf == '+' || *cbuf == ' ') + cbuf++; + if (every_first_cmd != NULL) + free(every_first_cmd); + if (*cbuf == '\0') + every_first_cmd = NULL; + else + every_first_cmd = save(cbuf); + break; + case A_OPT_TOGGLE: + toggle_option((unsigned char)optchar, cbuf, optflag); + optchar = '\0'; + break; + case A_F_BRACKET: + match_brac(cbuf[0], cbuf[1], 1, (int) number); + break; + case A_B_BRACKET: + match_brac(cbuf[1], cbuf[0], 0, (int) number); + break; +#if EXAMINE + case A_EXAMINE: + if (secure) + break; + edit_list(cbuf); +#if TAGS + /* If tag structure is loaded then clean it up. */ + cleantags(); +#endif + break; +#endif +#if SHELL_ESCAPE + case A_SHELL: + /* + * !! just uses whatever is in shellcmd. + * Otherwise, copy cmdbuf to shellcmd, + * expanding any special characters ("%" or "#"). + */ + if (*cbuf != '!') + { + if (shellcmd != NULL) + free(shellcmd); + shellcmd = fexpand(cbuf); + } + + if (secure) + break; + if (shellcmd == NULL) + lsystem("", "!done"); + else + lsystem(shellcmd, "!done"); + break; +#endif +#if PIPEC + case A_PIPE: + if (secure) + break; + (void) pipe_mark(pipec, cbuf); + error("|done", NULL_PARG); + break; +#endif + } +} + +/* + * Add a character to a multi-character command. + */ + static int +mca_char(c) + int c; +{ + char *p; + int flag; + char buf[3]; + PARG parg; + + switch (mca) + { + case 0: + /* + * Not in a multicharacter command. + */ + return (NO_MCA); + + case A_PREFIX: + /* + * In the prefix of a command. + * This not considered a multichar command + * (even tho it uses cmdbuf, etc.). + * It is handled in the commands() switch. + */ + return (NO_MCA); + + case A_DIGIT: + /* + * Entering digits of a number. + * Terminated by a non-digit. + */ + if ((c < '0' || c > '9') && + editchar(c, EC_PEEK|EC_NOHISTORY|EC_NOCOMPLETE|EC_NORIGHTLEFT) == A_INVALID) + { + /* + * Not part of the number. + * Treat as a normal command character. + */ + number = cmd_int(); + mca = 0; + cmd_accept(); + return (NO_MCA); + } + break; + + case A_OPT_TOGGLE: + /* + * Special case for the TOGGLE_OPTION command. + * If the option letter which was entered is a + * single-char option, execute the command immediately, + * so user doesn't have to hit RETURN. + * If the first char is + or -, this indicates + * OPT_UNSET or OPT_SET respectively, instead of OPT_TOGGLE. + * "--" begins inputting a long option name. + */ + if (optchar == '\0' && len_cmdbuf() == 0) + { + flag = (optflag & ~OPT_NO_PROMPT); + if (flag == OPT_NO_TOGGLE) + { + switch (c) + { + case '_': + /* "__" = long option name. */ + optgetname = TRUE; + mca_opt_toggle(); + return (MCA_MORE); + } + } else + { + switch (c) + { + case '+': + /* "-+" = UNSET. */ + optflag = (flag == OPT_UNSET) ? + OPT_TOGGLE : OPT_UNSET; + mca_opt_toggle(); + return (MCA_MORE); + case '!': + /* "-!" = SET */ + optflag = (flag == OPT_SET) ? + OPT_TOGGLE : OPT_SET; + mca_opt_toggle(); + return (MCA_MORE); + case CONTROL('P'): + optflag ^= OPT_NO_PROMPT; + mca_opt_toggle(); + return (MCA_MORE); + case '-': + /* "--" = long option name. */ + optgetname = TRUE; + mca_opt_toggle(); + return (MCA_MORE); + } + } + } + if (optgetname) + { + /* + * We're getting a long option name. + * See if we've matched an option name yet. + * If so, display the complete name and stop + * accepting chars until user hits RETURN. + */ + struct loption *o; + char *oname; + int lc; + + if (c == '\n' || c == '\r') + { + /* + * When the user hits RETURN, make sure + * we've matched an option name, then + * pretend he just entered the equivalent + * option letter. + */ + if (optchar == '\0') + { + parg.p_string = get_cmdbuf(); + error("There is no --%s option", &parg); + return (MCA_DONE); + } + optgetname = FALSE; + cmd_reset(); + c = optchar; + } else + { + if (optchar != '\0') + { + /* + * Already have a match for the name. + * Don't accept anything but erase/kill. + */ + if (c == erase_char || + c == erase2_char || + c == kill_char) + return (MCA_DONE); + return (MCA_MORE); + } + /* + * Add char to cmd buffer and try to match + * the option name. + */ + if (cmd_char(c) == CC_QUIT) + return (MCA_DONE); + p = get_cmdbuf(); + lc = ASCII_IS_LOWER(p[0]); + o = findopt_name(&p, &oname, NULL); + if (o != NULL) + { + /* + * Got a match. + * Remember the option letter and + * display the full option name. + */ + optchar = o->oletter; + if (!lc && ASCII_IS_LOWER(optchar)) + optchar = ASCII_TO_UPPER(optchar); + cmd_reset(); + mca_opt_toggle(); + for (p = oname; *p != '\0'; p++) + { + c = *p; + if (!lc && ASCII_IS_LOWER(c)) + c = ASCII_TO_UPPER(c); + if (cmd_char(c) != CC_OK) + return (MCA_DONE); + } + } + return (MCA_MORE); + } + } else + { + if (c == erase_char || c == erase2_char || c == kill_char) + break; + if (optchar != '\0') + /* We already have the option letter. */ + break; + } + + optchar = c; + if ((optflag & ~OPT_NO_PROMPT) != OPT_TOGGLE || + single_char_option(c)) + { + toggle_option(c, "", optflag); + return (MCA_DONE); + } + /* + * Display a prompt appropriate for the option letter. + */ + if ((p = opt_prompt(c)) == NULL) + { + buf[0] = '-'; + buf[1] = c; + buf[2] = '\0'; + p = buf; + } + start_mca(A_OPT_TOGGLE, p, (void*)NULL, 0); + return (MCA_MORE); + + case A_F_SEARCH: + case A_B_SEARCH: + /* + * Special case for search commands. + * Certain characters as the first char of + * the pattern have special meaning: + * ! Toggle the NO_MATCH flag + * * Toggle the PAST_EOF flag (less extension) + * @ Toggle the FIRST_FILE flag (less extension) + */ + if (len_cmdbuf() > 0) + /* + * Only works for the first char of the pattern. + */ + break; + + flag = 0; + switch (c) + { + case '*': + if (more_mode) + break; + case CONTROL('E'): /* ignore END of file */ + flag = SRCH_PAST_EOF; + break; + case '@': + if (more_mode) + break; + case CONTROL('F'): /* FIRST file */ + flag = SRCH_FIRST_FILE; + break; + case CONTROL('K'): /* KEEP position */ + flag = SRCH_NO_MOVE; + break; + case CONTROL('R'): /* Don't use REGULAR EXPRESSIONS */ + flag = SRCH_NO_REGEX; + break; + case CONTROL('N'): /* NOT match */ + case '!': + flag = SRCH_NO_MATCH; + break; + } + if (flag != 0) + { + search_type ^= flag; + mca_search(); + return (MCA_MORE); + } + break; + } + + /* + * Any other multicharacter command + * is terminated by a newline. + */ + if (c == '\n' || c == '\r') + { + /* + * Execute the command. + */ + exec_mca(); + return (MCA_DONE); + } + + /* + * Append the char to the command buffer. + */ + if (cmd_char(c) == CC_QUIT) + /* + * Abort the multi-char command. + */ + return (MCA_DONE); + + if ((mca == A_F_BRACKET || mca == A_B_BRACKET) && len_cmdbuf() >= 2) + { + /* + * Special case for the bracket-matching commands. + * Execute the command after getting exactly two + * characters from the user. + */ + exec_mca(); + return (MCA_DONE); + } + + /* + * Need another character. + */ + return (MCA_MORE); +} + +/* + * Make sure the screen is displayed. + */ + static void +make_display() +{ + /* + * If nothing is displayed yet, display starting from initial_scrpos. + */ + if (empty_screen()) + { + if (initial_scrpos.pos == NULL_POSITION) + /* + * {{ Maybe this should be: + * jump_loc(ch_zero(), jump_sline); + * but this behavior seems rather unexpected + * on the first screen. }} + */ + jump_loc(ch_zero(), 1); + else + jump_loc(initial_scrpos.pos, initial_scrpos.ln); + } else if (screen_trashed) + { + int save_top_scroll; + save_top_scroll = top_scroll; + top_scroll = 1; + repaint(); + top_scroll = save_top_scroll; + } +} + +/* + * Display the appropriate prompt. + */ + static void +prompt() +{ + register char *p; + + if (ungotp != NULL && ungotp > ungot) + { + /* + * No prompt necessary if commands are from + * ungotten chars rather than from the user. + */ + return; + } + + /* + * Make sure the screen is displayed. + */ + make_display(); + bottompos = position(BOTTOM_PLUS_ONE); + + /* + * If we've hit EOF on the last file, and the -E flag is set + * (or -F is set and this is the first prompt), then quit. + * {{ Relying on "first prompt" to detect a single-screen file + * fails if +G is used, for example. }} + */ + if ((quit_at_eof == OPT_ONPLUS || quit_if_one_screen) && + hit_eof && !(ch_getflags() & CH_HELPFILE) && + next_ifile(curr_ifile) == NULL_IFILE) + quit(QUIT_OK); + quit_if_one_screen = FALSE; +#if 0 /* This doesn't work well because some "te"s clear the screen. */ + /* + * If the -e flag is set and we've hit EOF on the last file, + * and the file is squished (shorter than the screen), quit. + */ + if (quit_at_eof && squished && + next_ifile(curr_ifile) == NULL_IFILE) + quit(QUIT_OK); +#endif + +#if MSDOS_COMPILER==WIN32C + /* + * In Win32, display the file name in the window title. + */ + if (!(ch_getflags() & CH_HELPFILE)) + SetConsoleTitle(pr_expand("Less?f - %f.", 0)); +#endif + /* + * Select the proper prompt and display it. + */ + clear_cmd(); + if (helpprompt) { + at_enter(AT_STANDOUT); + putstr("[Press 'h' for instructions.]"); + at_exit(); + helpprompt = 0; + } else { + p = pr_string(); + if (p == NULL || *p == '\0') + putchr(':'); + else + { + at_enter(AT_STANDOUT); + putstr(p); + if (be_helpful) + putstr(" [Press space to continue, 'q' to quit.]"); + at_exit(); + } + } +} + +/* + * Display the less version message. + */ + public void +dispversion() +{ + PARG parg; + + parg.p_string = version; + error("less %s", &parg); +} + +/* + * Get command character. + * The character normally comes from the keyboard, + * but may come from ungotten characters + * (characters previously given to ungetcc or ungetsc). + */ + public int +getcc() +{ + if (ungotp == NULL) + /* + * Normal case: no ungotten chars, so get one from the user. + */ + return (getchr()); + + if (ungotp > ungot) + /* + * Return the next ungotten char. + */ + return (*--ungotp); + + /* + * We have just run out of ungotten chars. + */ + ungotp = NULL; + if (len_cmdbuf() == 0 || !empty_screen()) + return (getchr()); + /* + * Command is incomplete, so try to complete it. + */ + switch (mca) + { + case A_DIGIT: + /* + * We have a number but no command. Treat as #g. + */ + return ('g'); + + case A_F_SEARCH: + case A_B_SEARCH: + /* + * We have "/string" but no newline. Add the \n. + */ + return ('\n'); + + default: + /* + * Some other incomplete command. Let user complete it. + */ + return (getchr()); + } +} + +/* + * "Unget" a command character. + * The next getcc() will return this character. + */ + public void +ungetcc(c) + int c; +{ + if (ungotp == NULL) + ungotp = ungot; + if (ungotp >= ungot + sizeof(ungot)) + { + error("ungetcc overflow", NULL_PARG); + quit(QUIT_ERROR); + } + *ungotp++ = c; +} + +/* + * Unget a whole string of command characters. + * The next sequence of getcc()'s will return this string. + */ + public void +ungetsc(s) + char *s; +{ + register char *p; + + for (p = s + strlen(s) - 1; p >= s; p--) + ungetcc(*p); +} + +/* + * Search for a pattern, possibly in multiple files. + * If SRCH_FIRST_FILE is set, begin searching at the first file. + * If SRCH_PAST_EOF is set, continue the search thru multiple files. + */ + static void +multi_search(pattern, n) + char *pattern; + int n; +{ + register int nomore; + IFILE save_ifile; + int changed_file; + + changed_file = 0; + save_ifile = save_curr_ifile(); + + if (search_type & SRCH_FIRST_FILE) + { + /* + * Start at the first (or last) file + * in the command line list. + */ + if (search_type & SRCH_FORW) + nomore = edit_first(); + else + nomore = edit_last(); + if (nomore) + { + unsave_ifile(save_ifile); + return; + } + changed_file = 1; + search_type &= ~SRCH_FIRST_FILE; + } + + for (;;) + { + n = search(search_type, pattern, n); + /* + * The SRCH_NO_MOVE flag doesn't "stick": it gets cleared + * after being used once. This allows "n" to work after + * using a /@@ search. + */ + search_type &= ~SRCH_NO_MOVE; + if (n == 0) + { + /* + * Found it. + */ + unsave_ifile(save_ifile); + return; + } + + if (n < 0) + /* + * Some kind of error in the search. + * Error message has been printed by search(). + */ + break; + + if ((search_type & SRCH_PAST_EOF) == 0) + /* + * We didn't find a match, but we're + * supposed to search only one file. + */ + break; + /* + * Move on to the next file. + */ + if (search_type & SRCH_FORW) + nomore = edit_next(1); + else + nomore = edit_prev(1); + if (nomore) + break; + changed_file = 1; + } + + /* + * Didn't find it. + * Print an error message if we haven't already. + */ + if (n > 0) + error("Pattern not found", NULL_PARG); + + if (changed_file) + { + /* + * Restore the file we were originally viewing. + */ + reedit_ifile(save_ifile); + } else + { + unsave_ifile(save_ifile); + } +} + +/* + * Main command processor. + * Accept and execute commands until a quit command. + */ + public void +commands() +{ + register int c = 0; + register int action; + register char *cbuf; + int newaction; + int save_search_type; + char *extra; + char tbuf[2]; + PARG parg; + IFILE old_ifile; + IFILE new_ifile; + char *tagfile; + + search_type = SRCH_FORW; + wscroll = (sc_height + 1) / 2; + newaction = A_NOACTION; + + for (;;) + { + mca = 0; + cmd_accept(); + number = 0; + optchar = '\0'; + + /* + * See if any signals need processing. + */ + if (sigs) + { + psignals(); + if (quitting) + quit(QUIT_SAVED_STATUS); + } + + /* + * See if window size changed, for systems that don't + * generate SIGWINCH. + */ + check_winch(); + + /* + * Display prompt and accept a character. + */ + cmd_reset(); + prompt(); + if (sigs) + continue; + if (newaction == A_NOACTION) + c = getcc(); + + again: + if (sigs) + continue; + + if (newaction != A_NOACTION) + { + action = newaction; + newaction = A_NOACTION; + } else + { + /* + * If we are in a multicharacter command, call mca_char. + * Otherwise we call fcmd_decode to determine the + * action to be performed. + */ + if (mca) + switch (mca_char(c)) + { + case MCA_MORE: + /* + * Need another character. + */ + c = getcc(); + goto again; + case MCA_DONE: + /* + * Command has been handled by mca_char. + * Start clean with a prompt. + */ + continue; + case NO_MCA: + /* + * Not a multi-char command + * (at least, not anymore). + */ + break; + } + + /* + * Decode the command character and decide what to do. + */ + if (mca) + { + /* + * We're in a multichar command. + * Add the character to the command buffer + * and display it on the screen. + * If the user backspaces past the start + * of the line, abort the command. + */ + if (cmd_char(c) == CC_QUIT || len_cmdbuf() == 0) + continue; + cbuf = get_cmdbuf(); + } else + { + /* + * Don't use cmd_char if we're starting fresh + * at the beginning of a command, because we + * don't want to echo the command until we know + * it is a multichar command. We also don't + * want erase_char/kill_char to be treated + * as line editing characters. + */ + tbuf[0] = c; + tbuf[1] = '\0'; + cbuf = tbuf; + } + extra = NULL; + action = fcmd_decode(cbuf, &extra); + /* + * If an "extra" string was returned, + * process it as a string of command characters. + */ + if (extra != NULL) + ungetsc(extra); + } + /* + * Clear the cmdbuf string. + * (But not if we're in the prefix of a command, + * because the partial command string is kept there.) + */ + if (action != A_PREFIX) + cmd_reset(); + + switch (action) + { + case A_DIGIT: + /* + * First digit of a number. + */ + start_mca(A_DIGIT, ":", (void*)NULL, CF_QUIT_ON_ERASE); + goto again; + + case A_F_WINDOW: + /* + * Forward one window (and set the window size). + */ + if (number > 0) + swindow = (int) number; + /* FALLTHRU */ + case A_F_SCREEN: + /* + * Forward one screen. + */ + if (number <= 0) + number = get_swindow(); + cmd_exec(); + if (show_attn) + set_attnpos(bottompos); + forward((int) number, 0, 1); + break; + + case A_B_WINDOW: + /* + * Backward one window (and set the window size). + */ + if (number > 0) + swindow = (int) number; + /* FALLTHRU */ + case A_B_SCREEN: + /* + * Backward one screen. + */ + if (number <= 0) + number = get_swindow(); + cmd_exec(); + backward((int) number, 0, 1); + break; + + case A_F_LINE: + /* + * Forward N (default 1) line. + */ + if (number <= 0) + number = 1; + cmd_exec(); + if (show_attn == OPT_ONPLUS && number > 1) + set_attnpos(bottompos); + forward((int) number, 0, 0); + break; + + case A_B_LINE: + /* + * Backward N (default 1) line. + */ + if (number <= 0) + number = 1; + cmd_exec(); + backward((int) number, 0, 0); + break; + + case A_FF_LINE: + /* + * Force forward N (default 1) line. + */ + if (number <= 0) + number = 1; + cmd_exec(); + if (show_attn == OPT_ONPLUS && number > 1) + set_attnpos(bottompos); + forward((int) number, 1, 0); + break; + + case A_BF_LINE: + /* + * Force backward N (default 1) line. + */ + if (number <= 0) + number = 1; + cmd_exec(); + backward((int) number, 1, 0); + break; + + case A_FF_SCREEN: + /* + * Force forward one screen. + */ + if (number <= 0) + number = get_swindow(); + cmd_exec(); + if (show_attn == OPT_ONPLUS) + set_attnpos(bottompos); + forward((int) number, 1, 0); + break; + + case A_F_FOREVER: + /* + * Forward forever, ignoring EOF. + */ + if (ch_getflags() & CH_HELPFILE) + break; + cmd_exec(); + jump_forw(); + ignore_eoi = 1; + hit_eof = 0; + while (!sigs) + forward(1, 0, 0); + ignore_eoi = 0; + /* + * This gets us back in "F mode" after processing + * a non-abort signal (e.g. window-change). + */ + if (sigs && !ABORT_SIGS()) + newaction = A_F_FOREVER; + break; + + case A_F_SCROLL: + /* + * Forward N lines + * (default same as last 'd' or 'u' command). + */ + if (number > 0) + wscroll = (int) number; + cmd_exec(); + if (show_attn == OPT_ONPLUS) + set_attnpos(bottompos); + forward(wscroll, 0, 0); + break; + + case A_B_SCROLL: + /* + * Forward N lines + * (default same as last 'd' or 'u' command). + */ + if (number > 0) + wscroll = (int) number; + cmd_exec(); + backward(wscroll, 0, 0); + break; + + case A_FREPAINT: + /* + * Flush buffers, then repaint screen. + * Don't flush the buffers on a pipe! + */ + if (ch_getflags() & CH_CANSEEK) + { + ch_flush(); + clr_linenum(); +#if HILITE_SEARCH + clr_hilite(); +#endif + } + /* FALLTHRU */ + case A_REPAINT: + /* + * Repaint screen. + */ + cmd_exec(); + repaint(); + break; + + case A_GOLINE: + /* + * Go to line N, default beginning of file. + */ + if (number <= 0) + number = 1; + cmd_exec(); + jump_back(number); + break; + + case A_PERCENT: + /* + * Go to a specified percentage into the file. + */ + if (number < 0) + number = 0; + if (number > 100) + number = 100; + cmd_exec(); + jump_percent((int) number); + break; + + case A_GOEND: + /* + * Go to line N, default end of file. + */ + cmd_exec(); + if (number <= 0) + jump_forw(); + else + jump_back(number); + break; + + case A_GOPOS: + /* + * Go to a specified byte position in the file. + */ + cmd_exec(); + if (number < 0) + number = 0; + jump_line_loc((POSITION) number, jump_sline); + break; + + case A_STAT: + /* + * Print file name, etc. + */ + if (ch_getflags() & CH_HELPFILE) + break; + cmd_exec(); + parg.p_string = eq_message(); + error("%s", &parg); + break; + + case A_VERSION: + /* + * Print version number, without the "@(#)". + */ + cmd_exec(); + dispversion(); + break; + + case A_QUIT: + /* + * Exit. + */ + if (curr_ifile != NULL_IFILE && + ch_getflags() & CH_HELPFILE) + { + /* + * Quit while viewing the help file + * just means return to viewing the + * previous file. + */ + hshift = save_hshift; + if (edit_prev(1) == 0) + break; + } + if (extra != NULL) + quit(*extra); + quit(QUIT_OK); + break; + +/* + * Define abbreviation for a commonly used sequence below. + */ +#define DO_SEARCH() if (number <= 0) number = 1; \ + mca_search(); \ + cmd_exec(); \ + multi_search((char *)NULL, (int) number); + + + case A_F_SEARCH: + /* + * Search forward for a pattern. + * Get the first char of the pattern. + */ + search_type = SRCH_FORW; + if (number <= 0) + number = 1; + mca_search(); + c = getcc(); + goto again; + + case A_B_SEARCH: + /* + * Search backward for a pattern. + * Get the first char of the pattern. + */ + search_type = SRCH_BACK; + if (number <= 0) + number = 1; + mca_search(); + c = getcc(); + goto again; + + case A_AGAIN_SEARCH: + /* + * Repeat previous search. + */ + DO_SEARCH(); + break; + + case A_T_AGAIN_SEARCH: + /* + * Repeat previous search, multiple files. + */ + search_type |= SRCH_PAST_EOF; + DO_SEARCH(); + break; + + case A_REVERSE_SEARCH: + /* + * Repeat previous search, in reverse direction. + */ + save_search_type = search_type; + search_type = SRCH_REVERSE(search_type); + DO_SEARCH(); + search_type = save_search_type; + break; + + case A_T_REVERSE_SEARCH: + /* + * Repeat previous search, + * multiple files in reverse direction. + */ + save_search_type = search_type; + search_type = SRCH_REVERSE(search_type); + search_type |= SRCH_PAST_EOF; + DO_SEARCH(); + search_type = save_search_type; + break; + + case A_UNDO_SEARCH: + undo_search(); + break; + + case A_HELP: + /* + * Help. + */ + if (ch_getflags() & CH_HELPFILE) + break; + cmd_exec(); + save_hshift = hshift; + hshift = 0; + (void) edit(FAKE_HELPFILE); + break; + + case A_EXAMINE: +#if EXAMINE + /* + * Edit a new file. Get the filename. + */ + if (secure) + { + error("Command not available", NULL_PARG); + break; + } + start_mca(A_EXAMINE, "Examine: ", ml_examine, 0); + c = getcc(); + goto again; +#else + error("Command not available", NULL_PARG); + break; +#endif + + case A_VISUAL: + /* + * Invoke an editor on the input file. + */ +#if EDITOR + if (secure) + { + error("Command not available", NULL_PARG); + break; + } + if (ch_getflags() & CH_HELPFILE) + break; + if (strcmp(get_filename(curr_ifile), "-") == 0) + { + error("Cannot edit standard input", NULL_PARG); + break; + } + if (curr_altfilename != NULL) + { + error("WARNING: This file was viewed via LESSOPEN", + NULL_PARG); + } + start_mca(A_SHELL, "!", ml_shell, 0); + /* + * Expand the editor prototype string + * and pass it to the system to execute. + * (Make sure the screen is displayed so the + * expansion of "+%lm" works.) + */ + make_display(); + cmd_exec(); + lsystem(pr_expand(editproto, 0), (char*)NULL); + break; +#else + error("Command not available", NULL_PARG); + break; +#endif + + case A_NEXT_FILE: + /* + * Examine next file. + */ +#if TAGS + if (ntags()) + { + error("No next file", NULL_PARG); + break; + } +#endif + if (number <= 0) + number = 1; + if (edit_next((int) number)) + { + if (quit_at_eof && hit_eof && + !(ch_getflags() & CH_HELPFILE)) + quit(QUIT_OK); + parg.p_string = (number > 1) ? "(N-th) " : ""; + error("No %snext file", &parg); + } + break; + + case A_PREV_FILE: + /* + * Examine previous file. + */ +#if TAGS + if (ntags()) + { + error("No previous file", NULL_PARG); + break; + } +#endif + if (number <= 0) + number = 1; + if (edit_prev((int) number)) + { + parg.p_string = (number > 1) ? "(N-th) " : ""; + error("No %sprevious file", &parg); + } + break; + + case A_NEXT_TAG: +#if TAGS + if (number <= 0) + number = 1; + tagfile = nexttag((int) number); + if (tagfile == NULL) + { + error("No next tag", NULL_PARG); + break; + } + if (edit(tagfile) == 0) + { + POSITION pos = tagsearch(); + if (pos != NULL_POSITION) + jump_loc(pos, jump_sline); + } +#else + error("Command not available", NULL_PARG); +#endif + break; + + case A_PREV_TAG: +#if TAGS + if (number <= 0) + number = 1; + tagfile = prevtag((int) number); + if (tagfile == NULL) + { + error("No previous tag", NULL_PARG); + break; + } + if (edit(tagfile) == 0) + { + POSITION pos = tagsearch(); + if (pos != NULL_POSITION) + jump_loc(pos, jump_sline); + } +#else + error("Command not available", NULL_PARG); +#endif + break; + + case A_INDEX_FILE: + /* + * Examine a particular file. + */ + if (number <= 0) + number = 1; + if (edit_index((int) number)) + error("No such file", NULL_PARG); + break; + + case A_REMOVE_FILE: + if (ch_getflags() & CH_HELPFILE) + break; + old_ifile = curr_ifile; + new_ifile = getoff_ifile(curr_ifile); + if (new_ifile == NULL_IFILE) + { + bell(); + break; + } + if (edit_ifile(new_ifile) != 0) + { + reedit_ifile(old_ifile); + break; + } + del_ifile(old_ifile); + break; + + case A_OPT_TOGGLE: + optflag = OPT_TOGGLE; + optgetname = FALSE; + mca_opt_toggle(); + c = getcc(); + goto again; + + case A_DISP_OPTION: + /* + * Report a flag setting. + */ + optflag = OPT_NO_TOGGLE; + optgetname = FALSE; + mca_opt_toggle(); + c = getcc(); + goto again; + + case A_FIRSTCMD: + /* + * Set an initial command for new files. + */ + start_mca(A_FIRSTCMD, "+", (void*)NULL, 0); + c = getcc(); + goto again; + + case A_SHELL: + /* + * Shell escape. + */ +#if SHELL_ESCAPE + if (secure) + { + error("Command not available", NULL_PARG); + break; + } + start_mca(A_SHELL, "!", ml_shell, 0); + c = getcc(); + goto again; +#else + error("Command not available", NULL_PARG); + break; +#endif + + case A_SETMARK: + /* + * Set a mark. + */ + if (ch_getflags() & CH_HELPFILE) + break; + start_mca(A_SETMARK, "mark: ", (void*)NULL, 0); + c = getcc(); + if (c == erase_char || c == erase2_char || + c == kill_char || c == '\n' || c == '\r') + break; + setmark(c); + break; + + case A_GOMARK: + /* + * Go to a mark. + */ + start_mca(A_GOMARK, "goto mark: ", (void*)NULL, 0); + c = getcc(); + if (c == erase_char || c == erase2_char || + c == kill_char || c == '\n' || c == '\r') + break; + gomark(c); + break; + + case A_PIPE: +#if PIPEC + if (secure) + { + error("Command not available", NULL_PARG); + break; + } + start_mca(A_PIPE, "|mark: ", (void*)NULL, 0); + c = getcc(); + if (c == erase_char || c == erase2_char || c == kill_char) + break; + if (c == '\n' || c == '\r') + c = '.'; + if (badmark(c)) + break; + pipec = c; + start_mca(A_PIPE, "!", ml_shell, 0); + c = getcc(); + goto again; +#else + error("Command not available", NULL_PARG); + break; +#endif + + case A_B_BRACKET: + case A_F_BRACKET: + start_mca(action, "Brackets: ", (void*)NULL, 0); + c = getcc(); + goto again; + + case A_LSHIFT: + if (number > 0) + shift_count = number; + else + number = (shift_count > 0) ? + shift_count : sc_width / 2; + if (number > hshift) + number = hshift; + hshift -= number; + screen_trashed = 1; + break; + + case A_RSHIFT: + if (number > 0) + shift_count = number; + else + number = (shift_count > 0) ? + shift_count : sc_width / 2; + hshift += number; + screen_trashed = 1; + break; + + case A_PREFIX: + /* + * The command is incomplete (more chars are needed). + * Display the current char, so the user knows + * what's going on, and get another character. + */ + if (mca != A_PREFIX) + { + cmd_reset(); + start_mca(A_PREFIX, " ", (void*)NULL, + CF_QUIT_ON_ERASE); + (void) cmd_char(c); + } + c = getcc(); + goto again; + + case A_NOACTION: + break; + + default: + if (be_helpful) + helpprompt = 1; + else + bell(); + break; + } + } +} diff --git a/commands/less/less/decode.c b/commands/less/less/decode.c new file mode 100644 index 000000000..712e57369 --- /dev/null +++ b/commands/less/less/decode.c @@ -0,0 +1,845 @@ +/* $NetBSD: decode.c,v 1.8 2006/10/26 01:33:08 mrg Exp $ */ + +/* + * Copyright (C) 1984-2004 Mark Nudelman + * + * You may distribute under the terms of either the GNU General Public + * License or the Less License, as specified in the README file. + * + * For more information about less, or for information on how to + * contact the author, see the README file. + */ + + +/* + * Routines to decode user commands. + * + * This is all table driven. + * A command table is a sequence of command descriptors. + * Each command descriptor is a sequence of bytes with the following format: + * ...<0> + * The characters c1,c2,...,cN are the command string; that is, + * the characters which the user must type. + * It is terminated by a null <0> byte. + * The byte after the null byte is the action code associated + * with the command string. + * If an action byte is OR-ed with A_EXTRA, this indicates + * that the option byte is followed by an extra string. + * + * There may be many command tables. + * The first (default) table is built-in. + * Other tables are read in from "lesskey" files. + * All the tables are linked together and are searched in order. + */ + +#include "less.h" +#include "cmd.h" +#include "lesskey.h" + +extern int erase_char, erase2_char, kill_char; +extern int secure; + +#define SK(k) \ + SK_SPECIAL_KEY, (k), 6, 1, 1, 1 +/* + * Command table is ordered roughly according to expected + * frequency of use, so the common commands are near the beginning. + */ + +static unsigned char cmdtable[] = +{ + '\r',0, A_F_LINE, + '\n',0, A_F_LINE, + 'e',0, A_F_LINE, + 'j',0, A_F_LINE, + SK(SK_DOWN_ARROW),0, A_F_LINE, + CONTROL('E'),0, A_F_LINE, + CONTROL('N'),0, A_F_LINE, + 'k',0, A_B_LINE, + 'y',0, A_B_LINE, + CONTROL('Y'),0, A_B_LINE, + SK(SK_CONTROL_K),0, A_B_LINE, + CONTROL('P'),0, A_B_LINE, + SK(SK_UP_ARROW),0, A_B_LINE, + 'J',0, A_FF_LINE, + 'K',0, A_BF_LINE, + 'Y',0, A_BF_LINE, + 'd',0, A_F_SCROLL, + CONTROL('D'),0, A_F_SCROLL, + 'u',0, A_B_SCROLL, + CONTROL('U'),0, A_B_SCROLL, + ' ',0, A_F_SCREEN, + 'f',0, A_F_SCREEN, + CONTROL('F'),0, A_F_SCREEN, + CONTROL('V'),0, A_F_SCREEN, + SK(SK_PAGE_DOWN),0, A_F_SCREEN, + 'b',0, A_B_SCREEN, + CONTROL('B'),0, A_B_SCREEN, + ESC,'v',0, A_B_SCREEN, + SK(SK_PAGE_UP),0, A_B_SCREEN, + 'z',0, A_F_WINDOW, + 'w',0, A_B_WINDOW, + ESC,' ',0, A_FF_SCREEN, + 'F',0, A_F_FOREVER, + 'R',0, A_FREPAINT, + 'r',0, A_REPAINT, + CONTROL('R'),0, A_REPAINT, + CONTROL('L'),0, A_REPAINT, + ESC,'u',0, A_UNDO_SEARCH, + 'g',0, A_GOLINE, + SK(SK_HOME),0, A_GOLINE, + '<',0, A_GOLINE, + ESC,'<',0, A_GOLINE, + 'p',0, A_PERCENT, + '%',0, A_PERCENT, + ESC,'[',0, A_LSHIFT, + ESC,']',0, A_RSHIFT, + ESC,'(',0, A_LSHIFT, + ESC,')',0, A_RSHIFT, + SK(SK_RIGHT_ARROW),0, A_RSHIFT, + SK(SK_LEFT_ARROW),0, A_LSHIFT, + '{',0, A_F_BRACKET|A_EXTRA, '{','}',0, + '}',0, A_B_BRACKET|A_EXTRA, '{','}',0, + '(',0, A_F_BRACKET|A_EXTRA, '(',')',0, + ')',0, A_B_BRACKET|A_EXTRA, '(',')',0, + '[',0, A_F_BRACKET|A_EXTRA, '[',']',0, + ']',0, A_B_BRACKET|A_EXTRA, '[',']',0, + ESC,CONTROL('F'),0, A_F_BRACKET, + ESC,CONTROL('B'),0, A_B_BRACKET, + 'G',0, A_GOEND, + ESC,'>',0, A_GOEND, + '>',0, A_GOEND, + SK(SK_END),0, A_GOEND, + 'P',0, A_GOPOS, + + '0',0, A_DIGIT, + '1',0, A_DIGIT, + '2',0, A_DIGIT, + '3',0, A_DIGIT, + '4',0, A_DIGIT, + '5',0, A_DIGIT, + '6',0, A_DIGIT, + '7',0, A_DIGIT, + '8',0, A_DIGIT, + '9',0, A_DIGIT, + + '=',0, A_STAT, + CONTROL('G'),0, A_STAT, + ':','f',0, A_STAT, + '/',0, A_F_SEARCH, + '?',0, A_B_SEARCH, + ESC,'/',0, A_F_SEARCH|A_EXTRA, '*',0, + ESC,'?',0, A_B_SEARCH|A_EXTRA, '*',0, + 'n',0, A_AGAIN_SEARCH, + ESC,'n',0, A_T_AGAIN_SEARCH, + 'N',0, A_REVERSE_SEARCH, + ESC,'N',0, A_T_REVERSE_SEARCH, + 'm',0, A_SETMARK, + '\'',0, A_GOMARK, + CONTROL('X'),CONTROL('X'),0, A_GOMARK, + 'E',0, A_EXAMINE, + ':','e',0, A_EXAMINE, + CONTROL('X'),CONTROL('V'),0, A_EXAMINE, + ':','n',0, A_NEXT_FILE, + ':','p',0, A_PREV_FILE, + 't',0, A_NEXT_TAG, + 'T',0, A_PREV_TAG, + ':','x',0, A_INDEX_FILE, + ':','d',0, A_REMOVE_FILE, + '-',0, A_OPT_TOGGLE, + ':','t',0, A_OPT_TOGGLE|A_EXTRA, 't',0, + 's',0, A_OPT_TOGGLE|A_EXTRA, 'o',0, + '_',0, A_DISP_OPTION, + '|',0, A_PIPE, + 'v',0, A_VISUAL, + '!',0, A_SHELL, + '+',0, A_FIRSTCMD, + + 'H',0, A_HELP, + 'h',0, A_HELP, + SK(SK_F1),0, A_HELP, + 'V',0, A_VERSION, + 'q',0, A_QUIT, + 'Q',0, A_QUIT, + ':','q',0, A_QUIT, + ':','Q',0, A_QUIT, + 'Z','Z',0, A_QUIT +}; + +static unsigned char edittable[] = +{ + '\t',0, EC_F_COMPLETE, /* TAB */ + '\17',0, EC_B_COMPLETE, /* BACKTAB */ + SK(SK_BACKTAB),0, EC_B_COMPLETE, /* BACKTAB */ + ESC,'\t',0, EC_B_COMPLETE, /* ESC TAB */ + CONTROL('L'),0, EC_EXPAND, /* CTRL-L */ + CONTROL('V'),0, EC_LITERAL, /* BACKSLASH */ + CONTROL('A'),0, EC_LITERAL, /* BACKSLASH */ + ESC,'l',0, EC_RIGHT, /* ESC l */ + SK(SK_RIGHT_ARROW),0, EC_RIGHT, /* RIGHTARROW */ + ESC,'h',0, EC_LEFT, /* ESC h */ + SK(SK_LEFT_ARROW),0, EC_LEFT, /* LEFTARROW */ + ESC,'b',0, EC_W_LEFT, /* ESC b */ + ESC,SK(SK_LEFT_ARROW),0, EC_W_LEFT, /* ESC LEFTARROW */ + SK(SK_CTL_LEFT_ARROW),0, EC_W_LEFT, /* CTRL-LEFTARROW */ + ESC,'w',0, EC_W_RIGHT, /* ESC w */ + ESC,SK(SK_RIGHT_ARROW),0, EC_W_RIGHT, /* ESC RIGHTARROW */ + SK(SK_CTL_RIGHT_ARROW),0, EC_W_RIGHT, /* CTRL-RIGHTARROW */ + ESC,'i',0, EC_INSERT, /* ESC i */ + SK(SK_INSERT),0, EC_INSERT, /* INSERT */ + ESC,'x',0, EC_DELETE, /* ESC x */ + SK(SK_DELETE),0, EC_DELETE, /* DELETE */ + ESC,'X',0, EC_W_DELETE, /* ESC X */ + ESC,SK(SK_DELETE),0, EC_W_DELETE, /* ESC DELETE */ + SK(SK_CTL_DELETE),0, EC_W_DELETE, /* CTRL-DELETE */ + SK(SK_CTL_BACKSPACE),0, EC_W_BACKSPACE, /* CTRL-BACKSPACE */ + ESC,'\b',0, EC_W_BACKSPACE, /* ESC BACKSPACE */ + ESC,'0',0, EC_HOME, /* ESC 0 */ + SK(SK_HOME),0, EC_HOME, /* HOME */ + ESC,'$',0, EC_END, /* ESC $ */ + SK(SK_END),0, EC_END, /* END */ + ESC,'k',0, EC_UP, /* ESC k */ + SK(SK_UP_ARROW),0, EC_UP, /* UPARROW */ + ESC,'j',0, EC_DOWN, /* ESC j */ + SK(SK_DOWN_ARROW),0, EC_DOWN, /* DOWNARROW */ +}; + +/* + * Structure to support a list of command tables. + */ +struct tablelist +{ + struct tablelist *t_next; + char *t_start; + char *t_end; +}; + +/* + * List of command tables and list of line-edit tables. + */ +static struct tablelist *list_fcmd_tables = NULL; +static struct tablelist *list_ecmd_tables = NULL; +static struct tablelist *list_var_tables = NULL; +static struct tablelist *list_sysvar_tables = NULL; + +static int add_cmd_table __P((struct tablelist **, char *, int)); +static int cmd_decode __P((struct tablelist *, char *, char **)); +static int gint __P((char **)); +static int old_lesskey __P((char *, int)); +static int new_lesskey __P((char *, int, int)); + +/* + * Expand special key abbreviations in a command table. + */ + static void +expand_special_keys(table, len) + char *table; + int len; +{ + register char *fm; + register char *to; + register int a; + char *repl; + int klen; + + for (fm = table; fm < table + len; ) + { + /* + * Rewrite each command in the table with any + * special key abbreviations expanded. + */ + for (to = fm; *fm != '\0'; ) + { + if (*fm != SK_SPECIAL_KEY) + { + *to++ = *fm++; + continue; + } + /* + * After SK_SPECIAL_KEY, next byte is the type + * of special key (one of the SK_* contants), + * and the byte after that is the number of bytes, + * N, reserved by the abbreviation (including the + * SK_SPECIAL_KEY and key type bytes). + * Replace all N bytes with the actual bytes + * output by the special key on this terminal. + */ + repl = special_key_str(fm[1]); + klen = fm[2] & 0377; + fm += klen; + if (repl == NULL || (int) strlen(repl) > klen) + repl = "\377"; + while (*repl != '\0') + *to++ = *repl++; + } + *to++ = '\0'; + /* + * Fill any unused bytes between end of command and + * the action byte with A_SKIP. + */ + while (to <= fm) + *to++ = A_SKIP; + fm++; + a = *fm++ & 0377; + if (a & A_EXTRA) + { + while (*fm++ != '\0') + continue; + } + } +} + +/* + * Initialize the command lists. + */ + public void +init_cmds() +{ + /* + * Add the default command tables. + */ + add_fcmd_table((char*)cmdtable, sizeof(cmdtable)); + add_ecmd_table((char*)edittable, sizeof(edittable)); +#if USERFILE + /* + * For backwards compatibility, + * try to add tables in the OLD system lesskey file. + */ +#ifdef BINDIR + add_hometable(NULL, BINDIR "/.sysless", 1); +#endif + /* + * Try to add the tables in the system lesskey file. + */ + add_hometable("LESSKEY_SYSTEM", LESSKEYFILE_SYS, 1); + /* + * Try to add the tables in the standard lesskey file "$HOME/.less". + */ + add_hometable("LESSKEY", LESSKEYFILE, 0); +#endif +} + +/* + * Add a command table. + */ + static int +add_cmd_table(tlist, buf, len) + struct tablelist **tlist; + char *buf; + int len; +{ + register struct tablelist *t; + + if (len == 0) + return (0); + /* + * Allocate a tablelist structure, initialize it, + * and link it into the list of tables. + */ + if ((t = (struct tablelist *) + calloc(1, sizeof(struct tablelist))) == NULL) + { + return (-1); + } + expand_special_keys(buf, len); + t->t_start = buf; + t->t_end = buf + len; + t->t_next = *tlist; + *tlist = t; + return (0); +} + +/* + * Add a command table. + */ + public void +add_fcmd_table(buf, len) + char *buf; + int len; +{ + if (add_cmd_table(&list_fcmd_tables, buf, len) < 0) + error("Warning: some commands disabled", NULL_PARG); +} + +/* + * Add an editing command table. + */ + public void +add_ecmd_table(buf, len) + char *buf; + int len; +{ + if (add_cmd_table(&list_ecmd_tables, buf, len) < 0) + error("Warning: some edit commands disabled", NULL_PARG); +} + +/* + * Add an environment variable table. + */ + static void +add_var_table(tlist, buf, len) + struct tablelist **tlist; + char *buf; + int len; +{ + if (add_cmd_table(tlist, buf, len) < 0) + error("Warning: environment variables from lesskey file unavailable", NULL_PARG); +} + +/* + * Search a single command table for the command string in cmd. + */ + static int +cmd_search(cmd, table, endtable, sp) + char *cmd; + char *table; + char *endtable; + char **sp; +{ + register char *p; + register char *q; + register int a; + + *sp = NULL; + for (p = table, q = cmd; p < endtable; p++, q++) + { + if (*p == *q) + { + /* + * Current characters match. + * If we're at the end of the string, we've found it. + * Return the action code, which is the character + * after the null at the end of the string + * in the command table. + */ + if (*p == '\0') + { + a = *++p & 0377; + while (a == A_SKIP) + a = *++p & 0377; + if (a == A_END_LIST) + { + /* + * We get here only if the original + * cmd string passed in was empty (""). + * I don't think that can happen, + * but just in case ... + */ + return (A_UINVALID); + } + /* + * Check for an "extra" string. + */ + if (a & A_EXTRA) + { + *sp = ++p; + a &= ~A_EXTRA; + } + return (a); + } + } else if (*q == '\0') + { + /* + * Hit the end of the user's command, + * but not the end of the string in the command table. + * The user's command is incomplete. + */ + return (A_PREFIX); + } else + { + /* + * Not a match. + * Skip ahead to the next command in the + * command table, and reset the pointer + * to the beginning of the user's command. + */ + if (*p == '\0' && p[1] == A_END_LIST) + { + /* + * A_END_LIST is a special marker that tells + * us to abort the cmd search. + */ + return (A_UINVALID); + } + while (*p++ != '\0') + continue; + while (*p == A_SKIP) + p++; + if (*p & A_EXTRA) + while (*++p != '\0') + continue; + q = cmd-1; + } + } + /* + * No match found in the entire command table. + */ + return (A_INVALID); +} + +/* + * Decode a command character and return the associated action. + * The "extra" string, if any, is returned in sp. + */ + static int +cmd_decode(tlist, cmd, sp) + struct tablelist *tlist; + char *cmd; + char **sp; +{ + register struct tablelist *t; + register int action = A_INVALID; + + /* + * Search thru all the command tables. + * Stop when we find an action which is not A_INVALID. + */ + for (t = tlist; t != NULL; t = t->t_next) + { + action = cmd_search(cmd, t->t_start, t->t_end, sp); + if (action != A_INVALID) + break; + } + if (action == A_UINVALID) + action = A_INVALID; + return (action); +} + +/* + * Decode a command from the cmdtables list. + */ + public int +fcmd_decode(cmd, sp) + char *cmd; + char **sp; +{ + return (cmd_decode(list_fcmd_tables, cmd, sp)); +} + +/* + * Decode a command from the edittables list. + */ + public int +ecmd_decode(cmd, sp) + char *cmd; + char **sp; +{ + return (cmd_decode(list_ecmd_tables, cmd, sp)); +} + +/* + * Get the value of an environment variable. + * Looks first in the lesskey file, then in the real environment. + */ + public char * +lgetenv(var) + char *var; +{ + int a; + char *s; + + a = cmd_decode(list_var_tables, var, &s); + if (a == EV_OK) + return (s); + s = getenv(var); + if (s != NULL && *s != '\0') + return (s); + a = cmd_decode(list_sysvar_tables, var, &s); + if (a == EV_OK) + return (s); + return (NULL); +} + +#if USERFILE +/* + * Get an "integer" from a lesskey file. + * Integers are stored in a funny format: + * two bytes, low order first, in radix KRADIX. + */ + static int +gint(sp) + char **sp; +{ + int n; + + n = *(*sp)++; + n += *(*sp)++ * KRADIX; + return (n); +} + +/* + * Process an old (pre-v241) lesskey file. + */ + static int +old_lesskey(buf, len) + char *buf; + int len; +{ + /* + * Old-style lesskey file. + * The file must end with either + * ...,cmd,0,action + * or ...,cmd,0,action|A_EXTRA,string,0 + * So the last byte or the second to last byte must be zero. + */ + if (buf[len-1] != '\0' && buf[len-2] != '\0') + return (-1); + add_fcmd_table(buf, len); + return (0); +} + +/* + * Process a new (post-v241) lesskey file. + */ + static int +new_lesskey(buf, len, sysvar) + char *buf; + int len; + int sysvar; +{ + char *p; + register int c; + register int n; + + /* + * New-style lesskey file. + * Extract the pieces. + */ + if (buf[len-3] != C0_END_LESSKEY_MAGIC || + buf[len-2] != C1_END_LESSKEY_MAGIC || + buf[len-1] != C2_END_LESSKEY_MAGIC) + return (-1); + p = buf + 4; + for (;;) + { + c = *p++; + switch (c) + { + case CMD_SECTION: + n = gint(&p); + add_fcmd_table(p, n); + p += n; + break; + case EDIT_SECTION: + n = gint(&p); + add_ecmd_table(p, n); + p += n; + break; + case VAR_SECTION: + n = gint(&p); + add_var_table((sysvar) ? + &list_sysvar_tables : &list_var_tables, p, n); + p += n; + break; + case END_SECTION: + return (0); + default: + /* + * Unrecognized section type. + */ + return (-1); + } + } +} + +/* + * Set up a user command table, based on a "lesskey" file. + */ + public int +lesskey(filename, sysvar) + char *filename; + int sysvar; +{ + register char *buf; + register POSITION len; + register long n; + register int f; + + if (secure) + return (1); + /* + * Try to open the lesskey file. + */ + filename = shell_unquote(filename); + f = open(filename, OPEN_READ); + free(filename); + if (f < 0) + return (1); + + /* + * Read the file into a buffer. + * We first figure out the size of the file and allocate space for it. + * {{ Minimal error checking is done here. + * A garbage .less file will produce strange results. + * To avoid a large amount of error checking code here, we + * rely on the lesskey program to generate a good .less file. }} + */ + len = filesize(f); + if (len == NULL_POSITION || len < 3) + { + /* + * Bad file (valid file must have at least 3 chars). + */ + close(f); + return (-1); + } + if ((buf = (char *) calloc((int)len, sizeof(char))) == NULL) + { + close(f); + return (-1); + } + if (lseek(f, (off_t)0, 0) == BAD_LSEEK) + { + free(buf); + close(f); + return (-1); + } + n = read(f, buf, (unsigned int) len); + close(f); + if (n != len) + { + free(buf); + return (-1); + } + + /* + * Figure out if this is an old-style (before version 241) + * or new-style lesskey file format. + */ + if (buf[0] != C0_LESSKEY_MAGIC || buf[1] != C1_LESSKEY_MAGIC || + buf[2] != C2_LESSKEY_MAGIC || buf[3] != C3_LESSKEY_MAGIC) + return (old_lesskey(buf, (int)len)); + return (new_lesskey(buf, (int)len, sysvar)); +} + +/* + * Add the standard lesskey file "$HOME/.less" + */ + public void +add_hometable(envname, def_filename, sysvar) + char *envname; + char *def_filename; + int sysvar; +{ + char *filename; + PARG parg; + + if (envname != NULL && (filename = lgetenv(envname)) != NULL) + filename = save(filename); + else if (sysvar) + filename = save(def_filename); + else + filename = homefile(def_filename); + if (filename == NULL) + return; + if (lesskey(filename, sysvar) < 0) + { + parg.p_string = filename; + error("Cannot use lesskey file \"%s\"", &parg); + } + free(filename); +} +#endif + +/* + * See if a char is a special line-editing command. + */ + public int +editchar(c, flags) + int c; + int flags; +{ + int action; + int nch; + char *s = NULL; /* XXX: GCC */ + char usercmd[MAX_CMDLEN+1]; + + /* + * An editing character could actually be a sequence of characters; + * for example, an escape sequence sent by pressing the uparrow key. + * To match the editing string, we use the command decoder + * but give it the edit-commands command table + * This table is constructed to match the user's keyboard. + */ + if (c == erase_char || c == erase2_char) + return (EC_BACKSPACE); + if (c == kill_char) + return (EC_LINEKILL); + + /* + * Collect characters in a buffer. + * Start with the one we have, and get more if we need them. + */ + nch = 0; + do { + if (nch > 0) + c = getcc(); + usercmd[nch] = c; + usercmd[nch+1] = '\0'; + nch++; + action = ecmd_decode(usercmd, &s); + } while (action == A_PREFIX); + + if (flags & EC_NORIGHTLEFT) + { + switch (action) + { + case EC_RIGHT: + case EC_LEFT: + action = A_INVALID; + break; + } + } +#if CMD_HISTORY + if (flags & EC_NOHISTORY) + { + /* + * The caller says there is no history list. + * Reject any history-manipulation action. + */ + switch (action) + { + case EC_UP: + case EC_DOWN: + action = A_INVALID; + break; + } + } +#endif +#if TAB_COMPLETE_FILENAME + if (flags & EC_NOCOMPLETE) + { + /* + * The caller says we don't want any filename completion cmds. + * Reject them. + */ + switch (action) + { + case EC_F_COMPLETE: + case EC_B_COMPLETE: + case EC_EXPAND: + action = A_INVALID; + break; + } + } +#endif + if ((flags & EC_PEEK) || action == A_INVALID) + { + /* + * We're just peeking, or we didn't understand the command. + * Unget all the characters we read in the loop above. + * This does NOT include the original character that was + * passed in as a parameter. + */ + while (nch > 1) + { + ungetcc(usercmd[--nch]); + } + } else + { + if (s != NULL) + ungetsc(s); + } + return action; +} + diff --git a/commands/less/less/defines.h b/commands/less/less/defines.h new file mode 100644 index 000000000..4e673ef48 --- /dev/null +++ b/commands/less/less/defines.h @@ -0,0 +1,411 @@ +/* $NetBSD: defines.h,v 1.7 2006/10/26 01:33:08 mrg Exp $ */ + +/* defines.h. Generated by configure. */ +/* defines.h.in. Generated from configure.ac by autoheader. */ + + +/* Unix definition file for less. -*- C -*- + * + * This file has 3 sections: + * User preferences. + * Settings always true on Unix. + * Settings automatically determined by configure. + * + * * * * * * WARNING * * * * * * + * If you edit defines.h by hand, do "touch stamp-h" before you run make + * so config.status doesn't overwrite your changes. + */ + +/* User preferences. */ + +/* + * SECURE is 1 if you wish to disable a bunch of features in order to + * be safe to run by unprivileged users. + * SECURE_COMPILE is set by the --with-secure configure option. + */ +#define SECURE SECURE_COMPILE + +/* + * SHELL_ESCAPE is 1 if you wish to allow shell escapes. + * (This is possible only if your system supplies the system() function.) + */ +#define SHELL_ESCAPE (!SECURE) + +/* + * EXAMINE is 1 if you wish to allow examining files by name from within less. + */ +#define EXAMINE (!SECURE) + +/* + * TAB_COMPLETE_FILENAME is 1 if you wish to allow the TAB key + * to complete filenames at prompts. + */ +#define TAB_COMPLETE_FILENAME (!SECURE) + +/* + * CMD_HISTORY is 1 if you wish to allow keys to cycle through + * previous commands at prompts. + */ +#define CMD_HISTORY 1 + +/* + * HILITE_SEARCH is 1 if you wish to have search targets to be + * displayed in standout mode. + */ +#define HILITE_SEARCH 1 + +/* + * EDITOR is 1 if you wish to allow editor invocation (the "v" command). + * (This is possible only if your system supplies the system() function.) + * EDIT_PGM is the name of the (default) editor to be invoked. + */ +#define EDITOR (!SECURE) + +/* + * TAGS is 1 if you wish to support tag files. + */ +#define TAGS (!SECURE) + +/* + * USERFILE is 1 if you wish to allow a .less file to specify + * user-defined key bindings. + */ +#define USERFILE (!SECURE) + +/* + * GLOB is 1 if you wish to have shell metacharacters expanded in filenames. + * This will generally work if your system provides the "popen" function + * and the "echo" shell command. + */ +#define GLOB (!SECURE) + +/* + * PIPEC is 1 if you wish to have the "|" command + * which allows the user to pipe data into a shell command. + */ +#define PIPEC (!SECURE) + +/* + * LOGFILE is 1 if you wish to allow the -l option (to create log files). + */ +#define LOGFILE (!SECURE) + +/* + * GNU_OPTIONS is 1 if you wish to support the GNU-style command + * line options --help and --version. + */ +#define GNU_OPTIONS 1 + +/* + * ONLY_RETURN is 1 if you want RETURN to be the only input which + * will continue past an error message. + * Otherwise, any key will continue past an error message. + */ +#define ONLY_RETURN 0 + +/* + * LESSKEYFILE is the filename of the default lesskey output file + * (in the HOME directory). + * LESSKEYFILE_SYS is the filename of the system-wide lesskey output file. + * DEF_LESSKEYINFILE is the filename of the default lesskey input + * (in the HOME directory). + * LESSHISTFILE is the filename of the history file + * (in the HOME directory). + */ +#define LESSKEYFILE ".less" +#define LESSKEYFILE_SYS SYSDIR "/sysless" +#define DEF_LESSKEYINFILE ".lesskey" +#define LESSHISTFILE ".lesshst" + + +/* Settings always true on Unix. */ + +/* + * Define MSDOS_COMPILER if compiling under Microsoft C. + */ +#define MSDOS_COMPILER 0 + +/* + * Pathname separator character. + */ +#define PATHNAME_SEP "/" + +/* + * HAVE_SYS_TYPES_H is 1 if your system has . + */ +#define HAVE_SYS_TYPES_H 1 + +/* + * Define if you have the header file. + */ +/* #undef HAVE_SGSTAT_H */ + +/* + * HAVE_PERROR is 1 if your system has the perror() call. + * (Actually, if it has sys_errlist, sys_nerr and errno.) + */ +#define HAVE_PERROR 1 + +/* + * HAVE_TIME is 1 if your system has the time() call. + */ +#define HAVE_TIME 1 + +/* + * HAVE_SHELL is 1 if your system supports a SHELL command interpreter. + */ +#define HAVE_SHELL 1 + +/* + * Default shell metacharacters and meta-escape character. + */ +#define DEF_METACHARS "; *?\t\n'\"()<>[]|&^`#\\" +#define DEF_METAESCAPE "\\" + +/* + * HAVE_DUP is 1 if your system has the dup() call. + */ +#define HAVE_DUP 1 + +/* + * Sizes of various buffers. + */ +#define CMDBUF_SIZE 512 /* Buffer for multichar commands */ +#define UNGOT_SIZE 100 /* Max chars to unget() */ +#define LINEBUF_SIZE 1024 /* Max size of line in input file */ +#define OUTBUF_SIZE 1024 /* Output buffer */ +#define PROMPT_SIZE 200 /* Max size of prompt string */ +#define TERMBUF_SIZE 2048 /* Termcap buffer for tgetent */ +#define TERMSBUF_SIZE 1024 /* Buffer to hold termcap strings */ +#define TAGLINE_SIZE 512 /* Max size of line in tags file */ +#define TABSTOP_MAX 32 /* Max number of custom tab stops */ + +/* Settings automatically determined by configure. */ + + +/* Define EDIT_PGM to your editor. */ +#define EDIT_PGM "vi" + +/* Define HAVE_CONST if your compiler supports the "const" modifier. */ +#define HAVE_CONST 1 + +/* Define to 1 if you have the header file. */ +#define HAVE_CTYPE_H 1 + +/* Define HAVE_ERRNO if you have the errno variable. */ +#define HAVE_ERRNO 1 + +/* Define to 1 if you have the header file. */ +#define HAVE_ERRNO_H 1 + +/* Define to 1 if you have the `fchmod' function. */ +#define HAVE_FCHMOD 1 + +/* Define to 1 if you have the header file. */ +#define HAVE_FCNTL_H 1 + +/* Define HAVE_FILENO if you have the fileno() macro. */ +#define HAVE_FILENO 1 + +/* Define to 1 if you have the `fsync' function. */ +#define HAVE_FSYNC 1 + +/* Define to 1 if you have the header file. */ +#define HAVE_INTTYPES_H 1 + +/* Define to 1 if you have the `gen' library (-lgen). */ +/* #undef HAVE_LIBGEN */ + +/* Define to 1 if you have the `intl' library (-lintl). */ +/* #undef HAVE_LIBINTL */ + +/* Define to 1 if you have the `PW' library (-lPW). */ +/* #undef HAVE_LIBPW */ + +/* Define to 1 if you have the header file. */ +#define HAVE_LIMITS_H 1 + +/* Define HAVE_LOCALE if you have locale.h and setlocale. */ +#define HAVE_LOCALE 0 + +/* Define to 1 if you have the `memcpy' function. */ +#define HAVE_MEMCPY 1 + +/* Define to 1 if you have the header file. */ +#define HAVE_MEMORY_H 1 + +/* Define HAVE_OSPEED if your termcap library has the ospeed variable. */ +#define HAVE_OSPEED 0 + +/* PCRE (Perl-compatible regular expression) library */ +/* #undef HAVE_PCRE */ + +/* Define to 1 if you have the `popen' function. */ +#define HAVE_POPEN 1 + +/* POSIX regcomp() and regex.h */ +#define HAVE_POSIX_REGCOMP 1 + +/* System V regcmp() */ +/* #undef HAVE_REGCMP */ + +/* */ +/* #undef HAVE_REGEXEC2 */ + +/* BSD re_comp() */ +/* #undef HAVE_RE_COMP */ + +/* Define HAVE_SIGEMPTYSET if you have the sigemptyset macro. */ +#define HAVE_SIGEMPTYSET 1 + +/* Define to 1 if you have the `sigprocmask' function. */ +#define HAVE_SIGPROCMASK 1 + +/* Define to 1 if you have the `sigsetmask' function. */ +#define HAVE_SIGSETMASK 1 + +/* Define HAVE_SIGSET_T you have the sigset_t type. */ +#define HAVE_SIGSET_T 1 + +/* Define to 1 if you have the `snprintf' function. */ +#define HAVE_SNPRINTF 1 + +/* Define to 1 if you have the `stat' function. */ +#define HAVE_STAT 1 + +/* Define to 1 if you have the header file. */ +#define HAVE_STDINT_H 1 + +/* Define to 1 if you have the header file. */ +#define HAVE_STDIO_H 1 + +/* Define to 1 if you have the header file. */ +#define HAVE_STDLIB_H 1 + +/* Define to 1 if you have the `strchr' function. */ +#define HAVE_STRCHR 1 + +/* Define HAVE_STRERROR if you have the strerror() function. */ +#define HAVE_STRERROR 1 + +/* Define to 1 if you have the header file. */ +#define HAVE_STRINGS_H 1 + +/* Define to 1 if you have the header file. */ +#define HAVE_STRING_H 1 + +/* Define to 1 if you have the `strstr' function. */ +#define HAVE_STRSTR 1 + +/* Define to 1 if you have the `system' function. */ +#define HAVE_SYSTEM 1 + +/* Define HAVE_SYS_ERRLIST if you have the sys_errlist[] variable. */ +#define HAVE_SYS_ERRLIST 1 + +/* Define to 1 if you have the header file. */ +#define HAVE_SYS_IOCTL_H 1 + +/* Define to 1 if you have the header file. */ +/* #undef HAVE_SYS_PTEM_H */ + +/* Define to 1 if you have the header file. */ +#define HAVE_SYS_STAT_H 1 + +/* Define to 1 if you have the header file. */ +/* #undef HAVE_SYS_STREAM_H */ + +/* Define to 1 if you have the header file. */ +#define HAVE_SYS_TYPES_H 1 + +/* Define to 1 if you have the header file. */ +#define HAVE_TERMCAP_H 1 + +/* Define HAVE_TERMIOS_FUNCS if you have tcgetattr/tcsetattr. */ +#define HAVE_TERMIOS_FUNCS 1 + +/* Define to 1 if you have the header file. */ +#define HAVE_TERMIOS_H 1 + +/* Define to 1 if you have the header file. */ +/* #undef HAVE_TERMIO_H */ + +/* Define to 1 if you have the header file. */ +#define HAVE_TIME_H 1 + +/* Define HAVE_TIME_T if your system supports the "time_t" type. */ +#define HAVE_TIME_T 1 + +/* Define to 1 if you have the header file. */ +#define HAVE_UNISTD_H 1 + +/* Define HAVE_UPPER_LOWER if you have isupper, islower, toupper, tolower. */ +#define HAVE_UPPER_LOWER 1 + +/* Henry Spencer V8 regcomp() and regexp.h */ +/* #undef HAVE_V8_REGCOMP */ + +/* Define to 1 if you have the header file. */ +/* #undef HAVE_VALUES_H */ + +/* Define HAVE_VOID if your compiler supports the "void" type. */ +#define HAVE_VOID 1 + +/* Define to 1 if you have the `_setjmp' function. */ +#define HAVE__SETJMP 1 + +/* Define MUST_DEFINE_ERRNO if you have errno but it is not define in errno.h. + */ +/* #undef MUST_DEFINE_ERRNO */ + +/* Define MUST_DEFINE_OSPEED if you have ospeed but it is not defined in + termcap.h. */ +/* #undef MUST_DEFINE_OSPEED */ + +/* pattern matching is supported, but without metacharacters. */ +/* #undef NO_REGEX */ + +/* Define to the address where bug reports for this package should be sent. */ +#define PACKAGE_BUGREPORT "" + +/* Define to the full name of this package. */ +#define PACKAGE_NAME "less" + +/* Define to the full name and version of this package. */ +#define PACKAGE_STRING "less 1" + +/* Define to the one symbol short name of this package. */ +#define PACKAGE_TARNAME "less" + +/* Define to the version of this package. */ +#define PACKAGE_VERSION "1" + +/* Define as the return type of signal handlers (`int' or `void'). */ +#define RETSIGTYPE void + +/* Define SECURE_COMPILE=1 to build a secure version of less. */ +#define SECURE_COMPILE 0 + +/* Define to 1 if the `S_IS*' macros in do not work properly. */ +/* #undef STAT_MACROS_BROKEN */ + +/* Define to 1 if you have the ANSI C header files. */ +#define STDC_HEADERS 1 + +/* Define to 1 if you can safely include both and . */ +#define TIME_WITH_SYS_TIME 1 + +/* Number of bits in a file offset, on hosts where this is settable. */ +/* #undef _FILE_OFFSET_BITS */ + +/* Define for large files, on AIX-style hosts. */ +/* #undef _LARGE_FILES */ + +/* Define to empty if `const' does not conform to ANSI C. */ +/* #undef const */ + +/* Define to `long' if does not define. */ +/* #undef off_t */ + +/* Define to `unsigned' if does not define. */ +/* #undef size_t */ diff --git a/commands/less/less/edit.c b/commands/less/less/edit.c new file mode 100644 index 000000000..1c58d95f5 --- /dev/null +++ b/commands/less/less/edit.c @@ -0,0 +1,795 @@ +/* $NetBSD: edit.c,v 1.9 2008/02/16 07:20:54 matt Exp $ */ + +/* + * Copyright (C) 1984-2005 Mark Nudelman + * + * You may distribute under the terms of either the GNU General Public + * License or the Less License, as specified in the README file. + * + * For more information about less, or for information on how to + * contact the author, see the README file. + */ + + +#include "less.h" + +public int fd0 = 0; + +extern int new_file; +extern int errmsgs; +extern int cbufs; +extern char *every_first_cmd; +extern int any_display; +extern int force_open; +extern int is_tty; +extern int sigs; +extern IFILE curr_ifile; +extern IFILE old_ifile; +extern struct scrpos initial_scrpos; +extern void *constant ml_examine; +#if SPACES_IN_FILENAMES +extern char openquote; +extern char closequote; +#endif + +#if LOGFILE +extern int logfile; +extern int force_logfile; +extern char *namelogfile; +#endif + +char *curr_altfilename = NULL; +static void *curr_altpipe; + + +static void close_file __P((void)); +static int edit_istep __P((IFILE, int, int)); +static int edit_inext __P((IFILE, int)); +static int edit_iprev __P((IFILE, int)); + +/* + * Textlist functions deal with a list of words separated by spaces. + * init_textlist sets up a textlist structure. + * forw_textlist uses that structure to iterate thru the list of + * words, returning each one as a standard null-terminated string. + * back_textlist does the same, but runs thru the list backwards. + */ + public void +init_textlist(tlist, str) + struct textlist *tlist; + char *str; +{ + char *s; +#if SPACES_IN_FILENAMES + int meta_quoted = 0; + int delim_quoted = 0; + char *esc = get_meta_escape(); + int esclen = strlen(esc); +#endif + + tlist->string = skipsp(str); + tlist->endstring = tlist->string + strlen(tlist->string); + for (s = str; s < tlist->endstring; s++) + { +#if SPACES_IN_FILENAMES + if (meta_quoted) + { + meta_quoted = 0; + } else if (esclen > 0 && s + esclen < tlist->endstring && + strncmp(s, esc, esclen) == 0) + { + meta_quoted = 1; + s += esclen - 1; + } else if (delim_quoted) + { + if (*s == closequote) + delim_quoted = 0; + } else /* (!delim_quoted) */ + { + if (*s == openquote) + delim_quoted = 1; + else if (*s == ' ') + *s = '\0'; + } +#else + if (*s == ' ') + *s = '\0'; +#endif + } +} + + public char * +forw_textlist(tlist, prev) + struct textlist *tlist; + char *prev; +{ + char *s; + + /* + * prev == NULL means return the first word in the list. + * Otherwise, return the word after "prev". + */ + if (prev == NULL) + s = tlist->string; + else + s = prev + strlen(prev); + if (s >= tlist->endstring) + return (NULL); + while (*s == '\0') + s++; + if (s >= tlist->endstring) + return (NULL); + return (s); +} + + public char * +back_textlist(tlist, prev) + struct textlist *tlist; + char *prev; +{ + char *s; + + /* + * prev == NULL means return the last word in the list. + * Otherwise, return the word before "prev". + */ + if (prev == NULL) + s = tlist->endstring; + else if (prev <= tlist->string) + return (NULL); + else + s = prev - 1; + while (*s == '\0') + s--; + if (s <= tlist->string) + return (NULL); + while (s[-1] != '\0' && s > tlist->string) + s--; + return (s); +} + +/* + * Close the current input file. + */ + static void +close_file() +{ + struct scrpos scrpos; + + if (curr_ifile == NULL_IFILE) + return; + + /* + * Save the current position so that we can return to + * the same position if we edit this file again. + */ + get_scrpos(&scrpos); + if (scrpos.pos != NULL_POSITION) + { + store_pos(curr_ifile, &scrpos); + lastmark(); + } + /* + * Close the file descriptor, unless it is a pipe. + */ + ch_close(); + /* + * If we opened a file using an alternate name, + * do special stuff to close it. + */ + if (curr_altfilename != NULL) + { + close_altfile(curr_altfilename, get_filename(curr_ifile), + curr_altpipe); + free(curr_altfilename); + curr_altfilename = NULL; + } + curr_ifile = NULL_IFILE; +} + +/* + * Edit a new file (given its name). + * Filename == "-" means standard input. + * Filename == NULL means just close the current file. + */ + public int +edit(filename) + char *filename; +{ + if (filename == NULL) + return (edit_ifile(NULL_IFILE)); + return (edit_ifile(get_ifile(filename, curr_ifile))); +} + +/* + * Edit a new file (given its IFILE). + * ifile == NULL means just close the current file. + */ + public int +edit_ifile(ifile) + IFILE ifile; +{ + int f; + int answer; + int no_display; + int chflags; + char *filename; + char *open_filename; + char *qopen_filename; + char *alt_filename; + void *alt_pipe; + IFILE was_curr_ifile; + PARG parg; + + if (ifile == curr_ifile) + { + /* + * Already have the correct file open. + */ + return (0); + } + + /* + * We must close the currently open file now. + * This is necessary to make the open_altfile/close_altfile pairs + * nest properly (or rather to avoid nesting at all). + * {{ Some stupid implementations of popen() mess up if you do: + * fA = popen("A"); fB = popen("B"); pclose(fA); pclose(fB); }} + */ +#if LOGFILE + end_logfile(); +#endif + was_curr_ifile = save_curr_ifile(); + if (curr_ifile != NULL_IFILE) + { + chflags = ch_getflags(); + close_file(); + if ((chflags & CH_HELPFILE) && held_ifile(was_curr_ifile) <= 1) + { + /* + * Don't keep the help file in the ifile list. + */ + del_ifile(was_curr_ifile); + was_curr_ifile = old_ifile; + } + } + + if (ifile == NULL_IFILE) + { + /* + * No new file to open. + * (Don't set old_ifile, because if you call edit_ifile(NULL), + * you're supposed to have saved curr_ifile yourself, + * and you'll restore it if necessary.) + */ + unsave_ifile(was_curr_ifile); + return (0); + } + + filename = save(get_filename(ifile)); + /* + * See if LESSOPEN specifies an "alternate" file to open. + */ + alt_pipe = NULL; + alt_filename = open_altfile(filename, &f, &alt_pipe); + open_filename = (alt_filename != NULL) ? alt_filename : filename; + qopen_filename = shell_unquote(open_filename); + + chflags = 0; + if (alt_pipe != NULL) + { + /* + * The alternate "file" is actually a pipe. + * f has already been set to the file descriptor of the pipe + * in the call to open_altfile above. + * Keep the file descriptor open because it was opened + * via popen(), and pclose() wants to close it. + */ + chflags |= CH_POPENED; + } else if (strcmp(open_filename, "-") == 0) + { + /* + * Use standard input. + * Keep the file descriptor open because we can't reopen it. + */ + f = fd0; + chflags |= CH_KEEPOPEN; + /* + * Must switch stdin to BINARY mode. + */ + SET_BINARY(f); +#if MSDOS_COMPILER==DJGPPC + /* + * Setting stdin to binary by default causes + * Ctrl-C to not raise SIGINT. We must undo + * that side-effect. + */ + __djgpp_set_ctrl_c(1); +#endif + } else if (strcmp(open_filename, FAKE_HELPFILE) == 0) + { + f = -1; + chflags |= CH_HELPFILE; + } else if ((parg.p_string = bad_file(open_filename)) != NULL) + { + /* + * It looks like a bad file. Don't try to open it. + */ + error("%s", &parg); + free((void *)parg.p_string); + err1: + if (alt_filename != NULL) + { + close_altfile(alt_filename, filename, alt_pipe); + free(alt_filename); + } + del_ifile(ifile); + free(qopen_filename); + free(filename); + /* + * Re-open the current file. + */ + if (was_curr_ifile == ifile) + { + /* + * Whoops. The "current" ifile is the one we just deleted. + * Just give up. + */ + quit(QUIT_ERROR); + } + reedit_ifile(was_curr_ifile); + return (1); + } else if ((f = open(qopen_filename, OPEN_READ)) < 0) + { + /* + * Got an error trying to open it. + */ + parg.p_string = errno_message(filename); + error("%s", &parg); + free((void *)parg.p_string); + goto err1; + } else + { + chflags |= CH_CANSEEK; + if (!force_open && !opened(ifile) && bin_file(f)) + { + /* + * Looks like a binary file. + * Ask user if we should proceed. + */ + parg.p_string = filename; + answer = query("\"%s\" may be a binary file. See it anyway? ", + &parg); + if (answer != 'y' && answer != 'Y') + { + close(f); + goto err1; + } + } + } + free(qopen_filename); + + /* + * Get the new ifile. + * Get the saved position for the file. + */ + if (was_curr_ifile != NULL_IFILE) + { + old_ifile = was_curr_ifile; + unsave_ifile(was_curr_ifile); + } + curr_ifile = ifile; + curr_altfilename = alt_filename; + curr_altpipe = alt_pipe; + set_open(curr_ifile); /* File has been opened */ + get_pos(curr_ifile, &initial_scrpos); + new_file = TRUE; + ch_init(f, chflags); + + if (!(chflags & CH_HELPFILE)) + { +#if LOGFILE + if (namelogfile != NULL && is_tty) + use_logfile(namelogfile); +#endif + if (every_first_cmd != NULL) + ungetsc(every_first_cmd); + } + + no_display = !any_display; + flush(); + any_display = TRUE; + + if (is_tty) + { + /* + * Output is to a real tty. + */ + + /* + * Indicate there is nothing displayed yet. + */ + pos_clear(); + clr_linenum(); +#if HILITE_SEARCH + clr_hilite(); +#endif + cmd_addhist(ml_examine, filename); + if (no_display && errmsgs > 0) + { + /* + * We displayed some messages on error output + * (file descriptor 2; see error() function). + * Before erasing the screen contents, + * display the file name and wait for a keystroke. + */ + parg.p_string = filename; + error("%s", &parg); + } + } + free(filename); + return (0); +} + +/* + * Edit a space-separated list of files. + * For each filename in the list, enter it into the ifile list. + * Then edit the first one. + */ + public int +edit_list(filelist) + char *filelist; +{ + IFILE save_ifile; + char *good_filename; + char *filename; + char *gfilelist; + char *gfilename; + struct textlist tl_files; + struct textlist tl_gfiles; + + save_ifile = save_curr_ifile(); + good_filename = NULL; + + /* + * Run thru each filename in the list. + * Try to glob the filename. + * If it doesn't expand, just try to open the filename. + * If it does expand, try to open each name in that list. + */ + init_textlist(&tl_files, filelist); + filename = NULL; + while ((filename = forw_textlist(&tl_files, filename)) != NULL) + { + gfilelist = lglob(filename); + init_textlist(&tl_gfiles, gfilelist); + gfilename = NULL; + while ((gfilename = forw_textlist(&tl_gfiles, gfilename)) != NULL) + { + if (edit(gfilename) == 0 && good_filename == NULL) + good_filename = get_filename(curr_ifile); + } + free(gfilelist); + } + /* + * Edit the first valid filename in the list. + */ + if (good_filename == NULL) + { + unsave_ifile(save_ifile); + return (1); + } + if (get_ifile(good_filename, curr_ifile) == curr_ifile) + { + /* + * Trying to edit the current file; don't reopen it. + */ + unsave_ifile(save_ifile); + return (0); + } + reedit_ifile(save_ifile); + return (edit(good_filename)); +} + +/* + * Edit the first file in the command line (ifile) list. + */ + public int +edit_first() +{ + curr_ifile = NULL_IFILE; + return (edit_next(1)); +} + +/* + * Edit the last file in the command line (ifile) list. + */ + public int +edit_last() +{ + curr_ifile = NULL_IFILE; + return (edit_prev(1)); +} + + +/* + * Edit the n-th next or previous file in the command line (ifile) list. + */ + static int +edit_istep(h, n, dir) + IFILE h; + int n; + int dir; +{ + IFILE next; + + /* + * Skip n filenames, then try to edit each filename. + */ + for (;;) + { + next = (dir > 0) ? next_ifile(h) : prev_ifile(h); + if (--n < 0) + { + if (edit_ifile(h) == 0) + break; + } + if (next == NULL_IFILE) + { + /* + * Reached end of the ifile list. + */ + return (1); + } + if (ABORT_SIGS()) + { + /* + * Interrupt breaks out, if we're in a long + * list of files that can't be opened. + */ + return (1); + } + h = next; + } + /* + * Found a file that we can edit. + */ + return (0); +} + + static int +edit_inext(h, n) + IFILE h; + int n; +{ + return (edit_istep(h, n, +1)); +} + + public int +edit_next(n) + int n; +{ + return edit_istep(curr_ifile, n, +1); +} + + static int +edit_iprev(h, n) + IFILE h; + int n; +{ + return (edit_istep(h, n, -1)); +} + + public int +edit_prev(n) + int n; +{ + return edit_istep(curr_ifile, n, -1); +} + +/* + * Edit a specific file in the command line (ifile) list. + */ + public int +edit_index(n) + int n; +{ + IFILE h; + + h = NULL_IFILE; + do + { + if ((h = next_ifile(h)) == NULL_IFILE) + { + /* + * Reached end of the list without finding it. + */ + return (1); + } + } while (get_index(h) != n); + + return (edit_ifile(h)); +} + + public IFILE +save_curr_ifile() +{ + if (curr_ifile != NULL_IFILE) + hold_ifile(curr_ifile, 1); + return (curr_ifile); +} + + public void +unsave_ifile(save_ifile) + IFILE save_ifile; +{ + if (save_ifile != NULL_IFILE) + hold_ifile(save_ifile, -1); +} + +/* + * Reedit the ifile which was previously open. + */ + public void +reedit_ifile(save_ifile) + IFILE save_ifile; +{ + IFILE next; + IFILE prev; + + /* + * Try to reopen the ifile. + * Note that opening it may fail (maybe the file was removed), + * in which case the ifile will be deleted from the list. + * So save the next and prev ifiles first. + */ + unsave_ifile(save_ifile); + next = next_ifile(save_ifile); + prev = prev_ifile(save_ifile); + if (edit_ifile(save_ifile) == 0) + return; + /* + * If can't reopen it, open the next input file in the list. + */ + if (next != NULL_IFILE && edit_inext(next, 0) == 0) + return; + /* + * If can't open THAT one, open the previous input file in the list. + */ + if (prev != NULL_IFILE && edit_iprev(prev, 0) == 0) + return; + /* + * If can't even open that, we're stuck. Just quit. + */ + quit(QUIT_ERROR); +} + +/* + * Edit standard input. + */ + public int +edit_stdin() +{ + if (isatty(fd0)) + { + error("Missing filename (\"less --help\" for help)", NULL_PARG); + quit(QUIT_OK); + } + return (edit("-")); +} + +/* + * Copy a file directly to standard output. + * Used if standard output is not a tty. + */ + public void +cat_file() +{ + register int c; + + while ((c = ch_forw_get()) != EOI) + putchr(c); + flush(); +} + +#if LOGFILE + +/* + * If the user asked for a log file and our input file + * is standard input, create the log file. + * We take care not to blindly overwrite an existing file. + */ + public void +use_logfile(filename) + char *filename; +{ + register int exists; + register int answer; + PARG parg; + + if (ch_getflags() & CH_CANSEEK) + /* + * Can't currently use a log file on a file that can seek. + */ + return; + + /* + * {{ We could use access() here. }} + */ + filename = shell_unquote(filename); + exists = open(filename, OPEN_READ); + if (exists >= 0) + close(exists); + exists = (exists >= 0); + + /* + * Decide whether to overwrite the log file or append to it. + * If it doesn't exist we "overwrite" it. + */ + if (!exists || force_logfile) + { + /* + * Overwrite (or create) the log file. + */ + answer = 'O'; + } else + { + /* + * Ask user what to do. + */ + parg.p_string = filename; + answer = query("Warning: \"%s\" exists; Overwrite, Append or Don't log? ", &parg); + } + +loop: + switch (answer) + { + case 'O': case 'o': + /* + * Overwrite: create the file. + */ + logfile = creat(filename, 0644); + break; + case 'A': case 'a': + /* + * Append: open the file and seek to the end. + */ + logfile = open(filename, OPEN_APPEND); + if (lseek(logfile, (off_t)0, 2) == BAD_LSEEK) + { + close(logfile); + logfile = -1; + } + break; + case 'D': case 'd': + /* + * Don't do anything. + */ + free(filename); + return; + case 'q': + quit(QUIT_OK); + /*NOTREACHED*/ + default: + /* + * Eh? + */ + answer = query("Overwrite, Append, or Don't log? (Type \"O\", \"A\", \"D\" or \"q\") ", NULL_PARG); + goto loop; + } + + if (logfile < 0) + { + /* + * Error in opening logfile. + */ + parg.p_string = filename; + error("Cannot write to \"%s\"", &parg); + free(filename); + return; + } + free(filename); + SET_BINARY(logfile); +} + +#endif diff --git a/commands/less/less/filename.c b/commands/less/less/filename.c new file mode 100644 index 000000000..60521e117 --- /dev/null +++ b/commands/less/less/filename.c @@ -0,0 +1,1043 @@ +/* $NetBSD: filename.c,v 1.7 2006/10/26 01:33:08 mrg Exp $ */ + +/* + * Copyright (C) 1984-2005 Mark Nudelman + * + * You may distribute under the terms of either the GNU General Public + * License or the Less License, as specified in the README file. + * + * For more information about less, or for information on how to + * contact the author, see the README file. + */ + + +/* + * Routines to mess around with filenames (and files). + * Much of this is very OS dependent. + */ + +#include "less.h" +#include "lglob.h" +#if MSDOS_COMPILER +#include +#if MSDOS_COMPILER==WIN32C && !defined(_MSC_VER) +#include +#endif +#if MSDOS_COMPILER==DJGPPC +#include +#include +#define _MAX_PATH PATH_MAX +#endif +#endif +#ifdef _OSK +#include +#ifndef _OSK_MWC32 +#include +#endif +#endif +#if OS2 +#include +#endif + +#if HAVE_STAT +#include +#ifndef S_ISDIR +#define S_ISDIR(m) (((m) & S_IFMT) == S_IFDIR) +#endif +#ifndef S_ISREG +#define S_ISREG(m) (((m) & S_IFMT) == S_IFREG) +#endif +#endif + + +extern int force_open; +extern int secure; +extern int use_lessopen; +extern IFILE curr_ifile; +extern IFILE old_ifile; +#if SPACES_IN_FILENAMES +extern char openquote; +extern char closequote; +#endif + +static char *dirfile __P((char *, char *)); +static POSITION seek_filesize __P((int)); +static char *readfd __P((FILE *)); +static int metachar __P((int)); +static FILE *shellcmd __P((char *)); + +/* + * Remove quotes around a filename. + */ + public char * +shell_unquote(str) + char *str; +{ + char *name; + char *p; + + name = p = (char *) ecalloc(strlen(str)+1, sizeof(char)); + if (*str == openquote) + { + str++; + while (*str != '\0') + { + if (*str == closequote) + { + if (str[1] != closequote) + break; + str++; + } + *p++ = *str++; + } + } else + { + char *esc = get_meta_escape(); + int esclen = strlen(esc); + while (*str != '\0') + { + if (esclen > 0 && strncmp(str, esc, esclen) == 0) + str += esclen; + *p++ = *str++; + } + } + *p = '\0'; + return (name); +} + +/* + * Get the shell's escape character. + */ + public char * +get_meta_escape() +{ + char *s; + + s = lgetenv("LESSMETAESCAPE"); + if (s == NULL) + s = DEF_METAESCAPE; + return (s); +} + +/* + * Get the characters which the shell considers to be "metacharacters". + */ + static char * +metachars() +{ + static char *mchars = NULL; + + if (mchars == NULL) + { + mchars = lgetenv("LESSMETACHARS"); + if (mchars == NULL) + mchars = DEF_METACHARS; + } + return (mchars); +} + +/* + * Is this a shell metacharacter? + */ + static int +metachar(c) + char c; +{ + return (strchr(metachars(), c) != NULL); +} + +/* + * Insert a backslash before each metacharacter in a string. + */ + public char * +shell_quote(s) + char *s; +{ + char *p; + char *newstr; + int len; + char *esc = get_meta_escape(); + int esclen = strlen(esc); + int use_quotes = 0; + int have_quotes = 0; + + /* + * Determine how big a string we need to allocate. + */ + len = 1; /* Trailing null byte */ + for (p = s; *p != '\0'; p++) + { + len++; + if (*p == openquote || *p == closequote) + have_quotes = 1; + if (metachar(*p)) + { + if (esclen == 0) + { + /* + * We've got a metachar, but this shell + * doesn't support escape chars. Use quotes. + */ + use_quotes = 1; + } else + { + /* + * Allow space for the escape char. + */ + len += esclen; + } + } + } + if (use_quotes) + { + if (have_quotes) + /* + * We can't quote a string that contains quotes. + */ + return (NULL); + len = strlen(s) + 3; + } + /* + * Allocate and construct the new string. + */ + newstr = p = (char *) ecalloc(len, sizeof(char)); + if (use_quotes) + { + SNPRINTF3(newstr, len, "%c%s%c", openquote, s, closequote); + } else + { + while (*s != '\0') + { + if (metachar(*s)) + { + /* + * Add the escape char. + */ + strcpy(p, esc); + p += esclen; + } + *p++ = *s++; + } + *p = '\0'; + } + return (newstr); +} + +/* + * Return a pathname that points to a specified file in a specified directory. + * Return NULL if the file does not exist in the directory. + */ + static char * +dirfile(dirname, filename) + char *dirname; + char *filename; +{ + char *pathname; + char *qpathname; + int len; + int f; + + if (dirname == NULL || *dirname == '\0') + return (NULL); + /* + * Construct the full pathname. + */ + len= strlen(dirname) + strlen(filename) + 2; + pathname = (char *) calloc(len, sizeof(char)); + if (pathname == NULL) + return (NULL); + SNPRINTF3(pathname, len, "%s%s%s", dirname, PATHNAME_SEP, filename); + /* + * Make sure the file exists. + */ + qpathname = shell_unquote(pathname); + f = open(qpathname, OPEN_READ); + if (f < 0) + { + free(pathname); + pathname = NULL; + } else + { + close(f); + } + free(qpathname); + return (pathname); +} + +/* + * Return the full pathname of the given file in the "home directory". + */ + public char * +homefile(filename) + char *filename; +{ + register char *pathname; + + /* + * Try $HOME/filename. + */ + pathname = dirfile(lgetenv("HOME"), filename); + if (pathname != NULL) + return (pathname); +#if OS2 + /* + * Try $INIT/filename. + */ + pathname = dirfile(lgetenv("INIT"), filename); + if (pathname != NULL) + return (pathname); +#endif +#if MSDOS_COMPILER || OS2 + /* + * Look for the file anywhere on search path. + */ + pathname = (char *) calloc(_MAX_PATH, sizeof(char)); +#if MSDOS_COMPILER==DJGPPC + { + char *res = searchpath(filename); + if (res == 0) + *pathname = '\0'; + else + strcpy(pathname, res); + } +#else + _searchenv(filename, "PATH", pathname); +#endif + if (*pathname != '\0') + return (pathname); + free(pathname); +#endif + return (NULL); +} + +/* + * Expand a string, substituting any "%" with the current filename, + * and any "#" with the previous filename. + * But a string of N "%"s is just replaced with N-1 "%"s. + * Likewise for a string of N "#"s. + * {{ This is a lot of work just to support % and #. }} + */ + public char * +fexpand(s) + char *s; +{ + register char *fr, *to; + register int n; + register char *e; + IFILE ifile; + +#define fchar_ifile(c) \ + ((c) == '%' ? curr_ifile : \ + (c) == '#' ? old_ifile : NULL_IFILE) + + /* + * Make one pass to see how big a buffer we + * need to allocate for the expanded string. + */ + n = 0; + for (fr = s; *fr != '\0'; fr++) + { + switch (*fr) + { + case '%': + case '#': + if (fr > s && fr[-1] == *fr) + { + /* + * Second (or later) char in a string + * of identical chars. Treat as normal. + */ + n++; + } else if (fr[1] != *fr) + { + /* + * Single char (not repeated). Treat specially. + */ + ifile = fchar_ifile(*fr); + if (ifile == NULL_IFILE) + n++; + else + n += strlen(get_filename(ifile)); + } + /* + * Else it is the first char in a string of + * identical chars. Just discard it. + */ + break; + default: + n++; + break; + } + } + + e = (char *) ecalloc(n+1, sizeof(char)); + + /* + * Now copy the string, expanding any "%" or "#". + */ + to = e; + for (fr = s; *fr != '\0'; fr++) + { + switch (*fr) + { + case '%': + case '#': + if (fr > s && fr[-1] == *fr) + { + *to++ = *fr; + } else if (fr[1] != *fr) + { + ifile = fchar_ifile(*fr); + if (ifile == NULL_IFILE) + *to++ = *fr; + else + { + strcpy(to, get_filename(ifile)); + to += strlen(to); + } + } + break; + default: + *to++ = *fr; + break; + } + } + *to = '\0'; + return (e); +} + +#if TAB_COMPLETE_FILENAME + +/* + * Return a blank-separated list of filenames which "complete" + * the given string. + */ + public char * +fcomplete(s) + char *s; +{ + char *fpat; + char *qs; + + if (secure) + return (NULL); + /* + * Complete the filename "s" by globbing "s*". + */ +#if MSDOS_COMPILER && (MSDOS_COMPILER == MSOFTC || MSDOS_COMPILER == BORLANDC) + /* + * But in DOS, we have to glob "s*.*". + * But if the final component of the filename already has + * a dot in it, just do "s*". + * (Thus, "FILE" is globbed as "FILE*.*", + * but "FILE.A" is globbed as "FILE.A*"). + */ + { + char *slash; + int len; + for (slash = s+strlen(s)-1; slash > s; slash--) + if (*slash == *PATHNAME_SEP || *slash == '/') + break; + len = strlen(s) + 4; + fpat = (char *) ecalloc(len, sizeof(char)); + if (strchr(slash, '.') == NULL) + SNPRINTF1(fpat, len, "%s*.*", s); + else + SNPRINTF1(fpat, len, "%s*", s); + } +#else + { + int len = strlen(s) + 2; + fpat = (char *) ecalloc(len, sizeof(char)); + SNPRINTF1(fpat, len, "%s*", s); + } +#endif + qs = lglob(fpat); + s = shell_unquote(qs); + if (strcmp(s,fpat) == 0) + { + /* + * The filename didn't expand. + */ + free(qs); + qs = NULL; + } + free(s); + free(fpat); + return (qs); +} +#endif + +/* + * Try to determine if a file is "binary". + * This is just a guess, and we need not try too hard to make it accurate. + */ + public int +bin_file(f) + int f; +{ + int i; + int n; + unsigned char data[64]; + + if (!seekable(f)) + return (0); + if (lseek(f, (off_t)0, 0) == BAD_LSEEK) + return (0); + n = read(f, data, sizeof(data)); + for (i = 0; i < n; i++) + if (binary_char(data[i])) + return (1); + return (0); +} + +/* + * Try to determine the size of a file by seeking to the end. + */ + static POSITION +seek_filesize(f) + int f; +{ + off_t spos; + + spos = lseek(f, (off_t)0, 2); + if (spos == BAD_LSEEK) + return (NULL_POSITION); + return ((POSITION) spos); +} + +/* + * Read a string from a file. + * Return a pointer to the string in memory. + */ + static char * +readfd(fd) + FILE *fd; +{ + int len; + int ch; + char *buf; + char *p; + + /* + * Make a guess about how many chars in the string + * and allocate a buffer to hold it. + */ + len = 100; + buf = (char *) ecalloc(len, sizeof(char)); + for (p = buf; ; p++) + { + if ((ch = getc(fd)) == '\n' || ch == EOF) + break; + if (p - buf >= len-1) + { + /* + * The string is too big to fit in the buffer we have. + * Allocate a new buffer, twice as big. + */ + len *= 2; + *p = '\0'; + p = (char *) ecalloc(len, sizeof(char)); + strcpy(p, buf); + free(buf); + buf = p; + p = buf + strlen(buf); + } + *p = ch; + } + *p = '\0'; + return (buf); +} + + + +#if HAVE_POPEN + +FILE *popen(); + +/* + * Execute a shell command. + * Return a pointer to a pipe connected to the shell command's standard output. + */ + static FILE * +shellcmd(cmd) + char *cmd; +{ + FILE *fd; + +#if HAVE_SHELL + char *shell; + + shell = lgetenv("SHELL"); + if (shell != NULL && *shell != '\0') + { + char *scmd; + char *esccmd; + + /* + * Read the output of <$SHELL -c cmd>. + * Escape any metacharacters in the command. + */ + esccmd = shell_quote(cmd); + if (esccmd == NULL) + { + fd = popen(cmd, "r"); + } else + { + int len = strlen(shell) + strlen(esccmd) + 5; + scmd = (char *) ecalloc(len, sizeof(char)); + SNPRINTF3(scmd, len, "%s %s %s", shell, shell_coption(), esccmd); + free(esccmd); + fd = popen(scmd, "r"); + free(scmd); + } + } else +#endif + { + fd = popen(cmd, "r"); + } + /* + * Redirection in `popen' might have messed with the + * standard devices. Restore binary input mode. + */ + SET_BINARY(0); + return (fd); +} + +#endif /* HAVE_POPEN */ + + +/* + * Expand a filename, doing any system-specific metacharacter substitutions. + */ + public char * +lglob(filename) + char *filename; +{ + char *gfilename; + char *ofilename; + + ofilename = fexpand(filename); + if (secure) + return (ofilename); + filename = shell_unquote(ofilename); + +#ifdef DECL_GLOB_LIST +{ + /* + * The globbing function returns a list of names. + */ + int length; + char *p; + char *qfilename; + DECL_GLOB_LIST(list) + + GLOB_LIST(filename, list); + if (GLOB_LIST_FAILED(list)) + { + free(filename); + return (ofilename); + } + length = 1; /* Room for trailing null byte */ + for (SCAN_GLOB_LIST(list, p)) + { + INIT_GLOB_LIST(list, p); + qfilename = shell_quote(p); + if (qfilename != NULL) + { + length += strlen(qfilename) + 1; + free(qfilename); + } + } + gfilename = (char *) ecalloc(length, sizeof(char)); + for (SCAN_GLOB_LIST(list, p)) + { + INIT_GLOB_LIST(list, p); + qfilename = shell_quote(p); + if (qfilename != NULL) + { + sprintf(gfilename + strlen(gfilename), "%s ", qfilename); + free(qfilename); + } + } + /* + * Overwrite the final trailing space with a null terminator. + */ + *--p = '\0'; + GLOB_LIST_DONE(list); +} +#else +#ifdef DECL_GLOB_NAME +{ + /* + * The globbing function returns a single name, and + * is called multiple times to walk thru all names. + */ + register char *p; + register int len; + register int n; + char *pathname; + char *qpathname; + DECL_GLOB_NAME(fnd,drive,dir,fname,ext,handle) + + GLOB_FIRST_NAME(filename, &fnd, handle); + if (GLOB_FIRST_FAILED(handle)) + { + free(filename); + return (ofilename); + } + + _splitpath(filename, drive, dir, fname, ext); + len = 100; + gfilename = (char *) ecalloc(len, sizeof(char)); + p = gfilename; + do { + n = strlen(drive) + strlen(dir) + strlen(fnd.GLOB_NAME) + 1; + pathname = (char *) ecalloc(n, sizeof(char)); + SNPRINTF3(pathname, n, "%s%s%s", drive, dir, fnd.GLOB_NAME); + qpathname = shell_quote(pathname); + free(pathname); + if (qpathname != NULL) + { + n = strlen(qpathname); + while (p - gfilename + n + 2 >= len) + { + /* + * No room in current buffer. + * Allocate a bigger one. + */ + len *= 2; + *p = '\0'; + p = (char *) ecalloc(len, sizeof(char)); + strcpy(p, gfilename); + free(gfilename); + gfilename = p; + p = gfilename + strlen(gfilename); + } + strcpy(p, qpathname); + free(qpathname); + p += n; + *p++ = ' '; + } + } while (GLOB_NEXT_NAME(handle, &fnd) == 0); + + /* + * Overwrite the final trailing space with a null terminator. + */ + *--p = '\0'; + GLOB_NAME_DONE(handle); +} +#else +#if HAVE_POPEN +{ + /* + * We get the shell to glob the filename for us by passing + * an "echo" command to the shell and reading its output. + */ + FILE *fd; + char *s; + char *lessecho; + char *cmd; + char *esc; + int len; + + esc = get_meta_escape(); + if (strlen(esc) == 0) + esc = "-"; + esc = shell_quote(esc); + if (esc == NULL) + { + free(filename); + return (ofilename); + } + lessecho = lgetenv("LESSECHO"); + if (lessecho == NULL || *lessecho == '\0') + lessecho = "lessecho"; + /* + * Invoke lessecho, and read its output (a globbed list of filenames). + */ + len = strlen(lessecho) + strlen(ofilename) + (7*strlen(metachars())) + 24; + cmd = (char *) ecalloc(len, sizeof(char)); + SNPRINTF4(cmd, len, "%s -p0x%x -d0x%x -e%s ", lessecho, openquote, closequote, esc); + free(esc); + for (s = metachars(); *s != '\0'; s++) + sprintf(cmd + strlen(cmd), "-n0x%x ", *s); + sprintf(cmd + strlen(cmd), "-- %s", ofilename); + fd = shellcmd(cmd); + free(cmd); + if (fd == NULL) + { + /* + * Cannot create the pipe. + * Just return the original (fexpanded) filename. + */ + free(filename); + return (ofilename); + } + gfilename = readfd(fd); + pclose(fd); + if (*gfilename == '\0') + { + free(gfilename); + free(filename); + return (ofilename); + } +} +#else + /* + * No globbing functions at all. Just use the fexpanded filename. + */ + gfilename = save(filename); +#endif +#endif +#endif + free(filename); + free(ofilename); + return (gfilename); +} + +/* + * See if we should open a "replacement file" + * instead of the file we're about to open. + */ + public char * +open_altfile(filename, pf, pfd) + char *filename; + int *pf; + void **pfd; +{ +#if !HAVE_POPEN + return (NULL); +#else + char *lessopen; + char *cmd; + int len; + FILE *fd; +#if HAVE_FILENO + int returnfd = 0; +#endif + + if (!use_lessopen || secure) + return (NULL); + ch_ungetchar(-1); + if ((lessopen = lgetenv("LESSOPEN")) == NULL) + return (NULL); + if (strcmp(filename, "-") == 0) + return (NULL); + if (*lessopen == '|') + { + /* + * If LESSOPEN starts with a |, it indicates + * a "pipe preprocessor". + */ +#if HAVE_FILENO + lessopen++; + returnfd = 1; +#else + error("LESSOPEN pipe is not supported", NULL_PARG); + return (NULL); +#endif + } + + len = strlen(lessopen) + strlen(filename) + 2; + cmd = (char *) ecalloc(len, sizeof(char)); + SNPRINTF1(cmd, len, lessopen, filename); + fd = shellcmd(cmd); + free(cmd); + if (fd == NULL) + { + /* + * Cannot create the pipe. + */ + return (NULL); + } +#if HAVE_FILENO + if (returnfd) + { + int f; + char c; + + /* + * Read one char to see if the pipe will produce any data. + * If it does, push the char back on the pipe. + */ + f = fileno(fd); + SET_BINARY(f); + if (read(f, &c, 1) != 1) + { + /* + * Pipe is empty. This means there is no alt file. + */ + pclose(fd); + return (NULL); + } + ch_ungetchar(c); + *pfd = (void *) fd; + *pf = f; + return (save("-")); + } +#endif + cmd = readfd(fd); + pclose(fd); + if (*cmd == '\0') + /* + * Pipe is empty. This means there is no alt file. + */ + return (NULL); + return (cmd); +#endif /* HAVE_POPEN */ +} + +/* + * Close a replacement file. + */ + public void +close_altfile(altfilename, filename, pipefd) + char *altfilename; + char *filename; + void *pipefd; +{ +#if HAVE_POPEN + char *lessclose; + FILE *fd; + char *cmd; + int len; + + if (secure) + return; + if (pipefd != NULL) + { +#if OS2 + /* + * The pclose function of OS/2 emx sometimes fails. + * Send SIGINT to the piped process before closing it. + */ + kill(((FILE*)pipefd)->_pid, SIGINT); +#endif + pclose((FILE*) pipefd); + } + if ((lessclose = lgetenv("LESSCLOSE")) == NULL) + return; + len = strlen(lessclose) + strlen(filename) + strlen(altfilename) + 2; + cmd = (char *) ecalloc(len, sizeof(char)); + SNPRINTF2(cmd, len, lessclose, filename, altfilename); + fd = shellcmd(cmd); + free(cmd); + if (fd != NULL) + pclose(fd); +#endif +} + +/* + * Is the specified file a directory? + */ + public int +is_dir(filename) + char *filename; +{ + int isdir = 0; + + filename = shell_unquote(filename); +#if HAVE_STAT +{ + int r; + struct stat statbuf; + + r = stat(filename, &statbuf); + isdir = (r >= 0 && S_ISDIR(statbuf.st_mode)); +} +#else +#ifdef _OSK +{ + register int f; + + f = open(filename, S_IREAD | S_IFDIR); + if (f >= 0) + close(f); + isdir = (f >= 0); +} +#endif +#endif + free(filename); + return (isdir); +} + +/* + * Returns NULL if the file can be opened and + * is an ordinary file, otherwise an error message + * (if it cannot be opened or is a directory, etc.) + */ + public char * +bad_file(filename) + char *filename; +{ + register char *m = NULL; + + filename = shell_unquote(filename); + if (is_dir(filename)) + { + static char is_a_dir[] = " is a directory"; + + m = (char *) ecalloc(strlen(filename) + sizeof(is_a_dir), + sizeof(char)); + strcpy(m, filename); + strcat(m, is_a_dir); + } else + { +#if HAVE_STAT + int r; + struct stat statbuf; + + r = stat(filename, &statbuf); + if (r < 0) + { + m = errno_message(filename); + } else if (force_open) + { + m = NULL; + } else if (!S_ISREG(statbuf.st_mode)) + { + static char not_reg[] = " is not a regular file (use -f to see it)"; + m = (char *) ecalloc(strlen(filename) + sizeof(not_reg), + sizeof(char)); + strcpy(m, filename); + strcat(m, not_reg); + } +#endif + } + free(filename); + return (m); +} + +/* + * Return the size of a file, as cheaply as possible. + * In Unix, we can stat the file. + */ + public POSITION +filesize(f) + int f; +{ +#if HAVE_STAT + struct stat statbuf; + + if (fstat(f, &statbuf) >= 0) + return ((POSITION) statbuf.st_size); +#else +#ifdef _OSK + long size; + + if ((size = (long) _gs_size(f)) >= 0) + return ((POSITION) size); +#endif +#endif + return (seek_filesize(f)); +} + +/* + * + */ + public char * +shell_coption() +{ + return ("-c"); +} diff --git a/commands/less/less/forwback.c b/commands/less/less/forwback.c new file mode 100644 index 000000000..769fa0128 --- /dev/null +++ b/commands/less/less/forwback.c @@ -0,0 +1,417 @@ +/* $NetBSD: forwback.c,v 1.10 2006/10/26 01:33:08 mrg Exp $ */ + +/* + * Copyright (C) 1984-2005 Mark Nudelman + * + * You may distribute under the terms of either the GNU General Public + * License or the Less License, as specified in the README file. + * + * For more information about less, or for information on how to + * contact the author, see the README file. + */ + + +/* + * Primitives for displaying the file on the screen, + * scrolling either forward or backward. + */ + +#include "less.h" +#include "position.h" + +public int hit_eof; /* Keeps track of how many times we hit end of file */ +public int screen_trashed; +public int squished; +public int no_back_scroll = 0; + +extern int sigs; +extern int top_scroll; +extern int quiet; +extern int sc_width, sc_height; +extern int quit_at_eof; +extern int more_mode; +extern int plusoption; +extern int forw_scroll; +extern int back_scroll; +extern int ignore_eoi; +extern int clear_bg; +extern int final_attr; +#if TAGS +extern char *tagoption; +#endif + +static void eof_bell __P((void)); +static void eof_check __P((void)); +static void squish_check __P((void)); + +/* + * Sound the bell to indicate user is trying to move past end of file. + */ + static void +eof_bell() +{ + if (quiet == NOT_QUIET) + bell(); + else + vbell(); +} + +/* + * Check to see if the end of file is currently "displayed". + */ + static void +eof_check() +{ + POSITION pos; + + if (ignore_eoi) + return; + if (ABORT_SIGS()) + return; + /* + * If the bottom line is empty, we are at EOF. + * If the bottom line ends at the file length, + * we must be just at EOF. + */ + pos = position(BOTTOM_PLUS_ONE); + if (pos == NULL_POSITION || pos == ch_length()) + hit_eof++; +} + +/* + * If the screen is "squished", repaint it. + * "Squished" means the first displayed line is not at the top + * of the screen; this can happen when we display a short file + * for the first time. + */ + static void +squish_check() +{ + if (!squished) + return; + squished = 0; + repaint(); +} + +/* + * Display n lines, scrolling forward, + * starting at position pos in the input file. + * "force" means display the n lines even if we hit end of file. + * "only_last" means display only the last screenful if n > screen size. + * "nblank" is the number of blank lines to draw before the first + * real line. If nblank > 0, the pos must be NULL_POSITION. + * The first real line after the blanks will start at ch_zero(). + */ + public void +forw(n, pos, force, only_last, nblank) + register int n; + POSITION pos; + int force; + int only_last; + int nblank; +{ + int eof = 0; + int nlines = 0; + int do_repaint; + static int first_time = 1; + + squish_check(); + + /* + * do_repaint tells us not to display anything till the end, + * then just repaint the entire screen. + * We repaint if we are supposed to display only the last + * screenful and the request is for more than a screenful. + * Also if the request exceeds the forward scroll limit + * (but not if the request is for exactly a screenful, since + * repainting itself involves scrolling forward a screenful). + */ + do_repaint = (only_last && n > sc_height-1) || + (forw_scroll >= 0 && n > forw_scroll && n != sc_height-1); + + if (!do_repaint) + { + if (top_scroll && n >= sc_height - 1 && pos != ch_length()) + { + /* + * Start a new screen. + * {{ This is not really desirable if we happen + * to hit eof in the middle of this screen, + * but we don't yet know if that will happen. }} + */ + pos_clear(); + add_forw_pos(pos); + force = 1; + if (more_mode == 0) + { + if (top_scroll == OPT_ONPLUS || + (first_time && top_scroll != OPT_ON)) + clear(); + home(); + } + } else + { + clear_bot(); + } + + if (pos != position(BOTTOM_PLUS_ONE) || empty_screen()) + { + /* + * This is not contiguous with what is + * currently displayed. Clear the screen image + * (position table) and start a new screen. + */ + pos_clear(); + add_forw_pos(pos); + force = 1; + if (top_scroll) + { + if (top_scroll == OPT_ONPLUS) + clear(); + home(); + } else if (!first_time) + { + putstr("...skipping...\n"); + } + } + } + + while (--n >= 0) + { + /* + * Read the next line of input. + */ + if (nblank > 0) + { + /* + * Still drawing blanks; don't get a line + * from the file yet. + * If this is the last blank line, get ready to + * read a line starting at ch_zero() next time. + */ + if (--nblank == 0) + pos = ch_zero(); + } else + { + /* + * Get the next line from the file. + */ + pos = forw_line(pos); + if (pos == NULL_POSITION) + { + /* + * End of file: stop here unless the top line + * is still empty, or "force" is true. + * Even if force is true, stop when the last + * line in the file reaches the top of screen. + */ + eof = 1; + if (!force && position(TOP) != NULL_POSITION) + break; + if (!empty_lines(0, 0) && + !empty_lines(1, 1) && + empty_lines(2, sc_height-1)) + break; + } + } + /* + * Add the position of the next line to the position table. + * Display the current line on the screen. + */ + add_forw_pos(pos); + nlines++; + if (do_repaint) + continue; + /* + * If this is the first screen displayed and + * we hit an early EOF (i.e. before the requested + * number of lines), we "squish" the display down + * at the bottom of the screen. + * But don't do this if a + option or a -t option + * was given. These options can cause us to + * start the display after the beginning of the file, + * and it is not appropriate to squish in that case. + */ + if ((first_time || more_mode) && + pos == NULL_POSITION && !top_scroll && +#if TAGS + tagoption == NULL && +#endif + !plusoption) + { + squished = 1; + continue; + } + if (top_scroll == OPT_ON) + clear_eol(); + put_line(); + if (clear_bg && apply_at_specials(final_attr) != AT_NORMAL) + { + /* + * Writing the last character on the last line + * of the display may have scrolled the screen. + * If we were in standout mode, clear_bg terminals + * will fill the new line with the standout color. + * Now we're in normal mode again, so clear the line. + */ + clear_eol(); + } + } + + if (ignore_eoi) + hit_eof = 0; + else if (eof && !ABORT_SIGS()) + hit_eof++; + else + eof_check(); + if (nlines == 0) + eof_bell(); + else if (do_repaint) + repaint(); + first_time = 0; + (void) currline(BOTTOM); +} + +/* + * Display n lines, scrolling backward. + */ + public void +back(n, pos, force, only_last) + register int n; + POSITION pos; + int force; + int only_last; +{ + int nlines = 0; + int do_repaint; + + squish_check(); + do_repaint = (n > get_back_scroll() || (only_last && n > sc_height-1)); + hit_eof = 0; + while (--n >= 0) + { + /* + * Get the previous line of input. + */ + pos = back_line(pos); + if (pos == NULL_POSITION) + { + /* + * Beginning of file: stop here unless "force" is true. + */ + if (!force) + break; + } + /* + * Add the position of the previous line to the position table. + * Display the line on the screen. + */ + add_back_pos(pos); + nlines++; + if (!do_repaint) + { + home(); + add_line(); + put_line(); + } + } + + eof_check(); + if (nlines == 0) + eof_bell(); + else if (do_repaint) + repaint(); + (void) currline(BOTTOM); +} + +/* + * Display n more lines, forward. + * Start just after the line currently displayed at the bottom of the screen. + */ + public void +forward(n, force, only_last) + int n; + int force; + int only_last; +{ + POSITION pos; + + if (quit_at_eof && hit_eof && !(ch_getflags() & CH_HELPFILE)) + { + /* + * If the -e flag is set and we're trying to go + * forward from end-of-file, go on to the next file. + */ + if (edit_next(1)) + quit(QUIT_OK); + return; + } + + pos = position(BOTTOM_PLUS_ONE); + if (pos == NULL_POSITION && (!force || empty_lines(2, sc_height-1))) + { + if (ignore_eoi) + { + /* + * ignore_eoi is to support A_F_FOREVER. + * Back up until there is a line at the bottom + * of the screen. + */ + if (empty_screen()) + pos = ch_zero(); + else + { + do + { + back(1, position(TOP), 1, 0); + pos = position(BOTTOM_PLUS_ONE); + } while (pos == NULL_POSITION); + } + } else + { + eof_bell(); + hit_eof++; + return; + } + } + forw(n, pos, force, only_last, 0); +} + +/* + * Display n more lines, backward. + * Start just before the line currently displayed at the top of the screen. + */ + public void +backward(n, force, only_last) + int n; + int force; + int only_last; +{ + POSITION pos; + + pos = position(TOP); + if (pos == NULL_POSITION && (!force || position(BOTTOM) == 0)) + { + eof_bell(); + return; + } + back(n, pos, force, only_last); +} + +/* + * Get the backwards scroll limit. + * Must call this function instead of just using the value of + * back_scroll, because the default case depends on sc_height and + * top_scroll, as well as back_scroll. + */ + public int +get_back_scroll() +{ + if (no_back_scroll) + return (0); + if (back_scroll >= 0) + return (back_scroll); + if (top_scroll) + return (sc_height - 2); + return (10000); /* infinity */ +} diff --git a/commands/less/less/funcs.h b/commands/less/less/funcs.h new file mode 100644 index 000000000..8abb65b25 --- /dev/null +++ b/commands/less/less/funcs.h @@ -0,0 +1,263 @@ +/* $NetBSD: funcs.h,v 1.9 2006/10/26 01:33:08 mrg Exp $ */ + + public char * save (); + public VOID_POINTER ecalloc (); + public char * skipsp (); + public int sprefix (); + public void quit () __attribute__((__noreturn__)); + public void raw_mode (); + public void scrsize (); + public char * special_key_str (); + public void get_term (); + public void init (); + public void deinit (); + public void home (); + public void add_line (); + public void remove_top (); + public void win32_scroll_up (); + public void lower_left (); + public void check_winch (); + public void goto_line (); + public void vbell (); + public void bell (); + public void clear (); + public void clear_eol (); + public void clear_bot (); + public void at_enter (); + public void at_exit (); + public void at_switch (); + public int is_at_equiv (); + public int apply_at_specials (); + public void backspace (); + public void putbs (); + public char WIN32getch (); + public void match_brac (); + public void ch_ungetchar (); + public void end_logfile (); + public void sync_logfile (); + public int ch_seek (); + public int ch_end_seek (); + public int ch_beg_seek (); + public POSITION ch_length (); + public POSITION ch_tell (); + public int ch_forw_get (); + public int ch_back_get (); + public void ch_setbufspace (); + public void ch_flush (); + public int seekable (); + public void ch_init (); + public void ch_close (); + public int ch_getflags (); + public void ch_dump (); + public void init_charset (); + public int binary_char (); + public int control_char (); + public char * prchar (); + public char * prutfchar (); + public int utf_len (); + public int is_utf8_well_formed (); + public LWCHAR get_wchar (); + public LWCHAR step_char (); + public int is_composing_char (); + public int is_ubin_char (); + public int is_wide_char (); + public int is_combining_char (); + public void cmd_reset (); + public void clear_cmd (); + public void cmd_putstr (); + public int len_cmdbuf (); + public void set_mlist (); + public void cmd_addhist (); + public void cmd_accept (); + public int cmd_char (); + public LINENUM cmd_int (); + public char * get_cmdbuf (); + public void init_cmdhist (); + public void save_cmdhist (); + public int in_mca (); + public void dispversion (); + public int getcc (); + public void ungetcc (); + public void ungetsc (); + public void commands (); + public void init_cmds (); + public void add_fcmd_table (); + public void add_ecmd_table (); + public int fcmd_decode (); + public int ecmd_decode (); + public char * lgetenv (); + public int lesskey (); + public void add_hometable (); + public int editchar (); + public void init_textlist (); + public char * forw_textlist (); + public char * back_textlist (); + public int edit (); + public int edit_ifile (); + public int edit_list (); + public int edit_first (); + public int edit_last (); + public int edit_next (); + public int edit_prev (); + public int edit_index (); + public IFILE save_curr_ifile (); + public void unsave_ifile (); + public void reedit_ifile (); + public int edit_stdin (); + public void cat_file (); + public void use_logfile (); + public char * shell_unquote (); + public char * get_meta_escape (); + public char * shell_quote (); + public char * homefile (); + public char * fexpand (); + public char * fcomplete (); + public int bin_file (); + public char * lglob (); + public char * open_altfile (); + public void close_altfile (); + public int is_dir (); + public char * bad_file (); + public POSITION filesize (); + public char * shell_coption (); + public void forw (); + public void back (); + public void forward (); + public void backward (); + public int get_back_scroll (); + public void del_ifile (); + public IFILE next_ifile (); + public IFILE prev_ifile (); + public IFILE getoff_ifile (); + public int nifile (); + public IFILE get_ifile (); + public char * get_filename (); + public int get_index (); + public void store_pos (); + public void get_pos (); + public void set_open (); + public int opened (); + public void hold_ifile (); + public int held_ifile (); + public void * get_filestate (); + public void set_filestate (); + public void if_dump (); + public POSITION forw_line (); + public POSITION back_line (); + public void set_attnpos (); + public void jump_forw (); + public void jump_back (); + public void repaint (); + public void jump_percent (); + public void jump_line_loc (); + public void jump_loc (); + public void init_line (); + public int is_ascii_char (); + public void prewind (); + public void plinenum (); + public void pshift_all (); + public int is_ansi_end (); + public int is_ansi_middle (); + public int pappend (); + public int pflushmbc (); + public void pdone (); + public int gline (); + public void null_line (); + public POSITION forw_raw_line (); + public POSITION back_raw_line (); + public void clr_linenum (); + public void add_lnum (); + public LINENUM find_linenum (); + public POSITION find_pos (); + public LINENUM currline (); + public void lsystem (); + public int pipe_mark (); + public int pipe_data (); + public void init_mark (); + public int badmark (); + public void setmark (); + public void lastmark (); + public void gomark (); + public POSITION markpos (); + public void unmark (); + public void opt_o (); + public void opt__O (); + public void opt_l (); + public void opt_k (); + public void opt_t (); + public void opt__T (); + public void opt_p (); + public void opt__P (); + public void opt_b (); + public void opt_i (); + public void opt__V (); + public void opt_D (); + public void opt_x (); + public void opt_quote (); + public void opt_query (); + public int get_swindow (); + public void scan_option (); + public void toggle_option (); + public int single_char_option (); + public char * opt_prompt (); + public int isoptpending (); + public void nopendopt (); + public int getnum (); + public void init_option (); + public struct loption * findopt (); + public struct loption * findopt_name (); + public int iread (); + public void intread (); + public long get_time (); + public char * errno_message (); + public int percentage (); + public POSITION percent_pos (); + public int os9_signal (); + public void put_line (); + public void flush (); + public int putchr (); + public void putstr (); + public void get_return (); + public void error (); + public void ierror (); + public int query (); + public POSITION position (); + public void add_forw_pos (); + public void add_back_pos (); + public void pos_clear (); + public void pos_init (); + public int onscreen (); + public int empty_screen (); + public int empty_lines (); + public void get_scrpos (); + public int adjsline (); + public void init_prompt (); + public char * pr_expand (); + public char * eq_message (); + public char * pr_string (); + public char * wait_message (); + public void repaint_hilite (); + public void clear_attn (); + public void undo_search (); + public void clr_hilite (); + public int is_hilited (); + public void chg_caseless (); + public void chg_hilite (); + public int search (); + public void prep_hilite (); + public RETSIGTYPE winch (); + public RETSIGTYPE winch (); + public void init_signals (); + public void psignals (); + public void cleantags (); + public int gettagtype (); + public void findtag (); + public POSITION tagsearch (); + public char * nexttag (); + public char * prevtag (); + public int ntags (); + public int curr_tag (); + public int edit_tagfile (); + public void open_getchr (); + public void close_getchr (); + public int getchr (); diff --git a/commands/less/less/help.c b/commands/less/less/help.c new file mode 100644 index 000000000..c7da7139b --- /dev/null +++ b/commands/less/less/help.c @@ -0,0 +1,232 @@ +/* $NetBSD: help.c,v 1.6 2006/11/20 22:06:26 dsl Exp $ */ + +/* This file was generated by mkhelp from less.hlp */ +#include "less.h" +#ifdef SMALL +constant char helpdata[] = "\nNo help available\n"; +#else +constant char helpdata[] = { +'\n', +' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ','S','\b','S','U','\b','U','M','\b','M','M','\b','M','A','\b','A','R','\b','R','Y','\b','Y',' ','O','\b','O','F','\b','F',' ','L','\b','L','E','\b','E','S','\b','S','S','\b','S',' 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',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ','C','o','m','p','l','e','t','e',' ','f','i','l','e','n','a','m','e',' ','&',' ','c','y','c','l','e','.','\n', +' ','S','H','I','F','T','-','T','A','B',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ','E','S','C','-','T','A','B',' ',' ',' ','C','o','m','p','l','e','t','e',' ','f','i','l','e','n','a','m','e',' ','&',' ','r','e','v','e','r','s','e',' ','c','y','c','l','e','.','\n', +' ','C','N','T','L','-','L',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ','C','o','m','p','l','e','t','e',' ','f','i','l','e','n','a','m','e',',',' ','l','i','s','t',' ','a','l','l','.','\n', +'\n', + 0 }; +#endif +constant int size_helpdata = sizeof(helpdata) - 1; diff --git a/commands/less/less/ifile.c b/commands/less/less/ifile.c new file mode 100644 index 000000000..11c1af909 --- /dev/null +++ b/commands/less/less/ifile.c @@ -0,0 +1,354 @@ +/* $NetBSD: ifile.c,v 1.6 2006/10/26 01:33:08 mrg Exp $ */ + +/* + * Copyright (C) 1984-2004 Mark Nudelman + * + * You may distribute under the terms of either the GNU General Public + * License or the Less License, as specified in the README file. + * + * For more information about less, or for information on how to + * contact the author, see the README file. + */ + + +/* + * An IFILE represents an input file. + * + * It is actually a pointer to an ifile structure, + * but is opaque outside this module. + * Ifile structures are kept in a linked list in the order they + * appear on the command line. + * Any new file which does not already appear in the list is + * inserted after the current file. + */ + +#include "less.h" + +extern IFILE curr_ifile; + +struct ifile { + struct ifile *h_next; /* Links for command line list */ + struct ifile *h_prev; + char *h_filename; /* Name of the file */ + void *h_filestate; /* File state (used in ch.c) */ + int h_index; /* Index within command line list */ + int h_hold; /* Hold count */ + char h_opened; /* Has this ifile been opened? */ + struct scrpos h_scrpos; /* Saved position within the file */ +}; + +/* + * Convert an IFILE (external representation) + * to a struct file (internal representation), and vice versa. + */ +#define int_ifile(h) ((struct ifile *)(h)) +#define ext_ifile(h) ((IFILE)(h)) + +/* + * Anchor for linked list. + */ +static struct ifile anchor = { &anchor, &anchor, NULL, NULL, 0, 0, '\0', + { NULL_POSITION, 0 } }; +static int ifiles = 0; + +static void incr_index __P((struct ifile *, int)); +static void link_ifile __P((struct ifile *, struct ifile *)); +static void unlink_ifile __P((struct ifile *)); +static struct ifile *new_ifile __P((char *, struct ifile *)); +static struct ifile *find_ifile __P((char *)); + + static void +incr_index(p, incr) + register struct ifile *p; + int incr; +{ + for (; p != &anchor; p = p->h_next) + p->h_index += incr; +} + +/* + * Link an ifile into the ifile list. + */ + static void +link_ifile(p, prev) + struct ifile *p; + struct ifile *prev; +{ + /* + * Link into list. + */ + if (prev == NULL) + prev = &anchor; + p->h_next = prev->h_next; + p->h_prev = prev; + prev->h_next->h_prev = p; + prev->h_next = p; + /* + * Calculate index for the new one, + * and adjust the indexes for subsequent ifiles in the list. + */ + p->h_index = prev->h_index + 1; + incr_index(p->h_next, 1); + ifiles++; +} + +/* + * Unlink an ifile from the ifile list. + */ + static void +unlink_ifile(p) + struct ifile *p; +{ + p->h_next->h_prev = p->h_prev; + p->h_prev->h_next = p->h_next; + incr_index(p->h_next, -1); + ifiles--; +} + +/* + * Allocate a new ifile structure and stick a filename in it. + * It should go after "prev" in the list + * (or at the beginning of the list if "prev" is NULL). + * Return a pointer to the new ifile structure. + */ + static struct ifile * +new_ifile(filename, prev) + char *filename; + struct ifile *prev; +{ + register struct ifile *p; + + /* + * Allocate and initialize structure. + */ + p = (struct ifile *) ecalloc(1, sizeof(struct ifile)); + p->h_filename = save(filename); + p->h_scrpos.pos = NULL_POSITION; + p->h_opened = 0; + p->h_hold = 0; + p->h_filestate = NULL; + link_ifile(p, prev); + return (p); +} + +/* + * Delete an existing ifile structure. + */ + public void +del_ifile(h) + IFILE h; +{ + register struct ifile *p; + + if (h == NULL_IFILE) + return; + /* + * If the ifile we're deleting is the currently open ifile, + * move off it. + */ + unmark(h); + if (h == curr_ifile) + curr_ifile = getoff_ifile(curr_ifile); + p = int_ifile(h); + unlink_ifile(p); + free(p->h_filename); + free(p); +} + +/* + * Get the ifile after a given one in the list. + */ + public IFILE +next_ifile(h) + IFILE h; +{ + register struct ifile *p; + + p = (h == NULL_IFILE) ? &anchor : int_ifile(h); + if (p->h_next == &anchor) + return (NULL_IFILE); + return (ext_ifile(p->h_next)); +} + +/* + * Get the ifile before a given one in the list. + */ + public IFILE +prev_ifile(h) + IFILE h; +{ + register struct ifile *p; + + p = (h == NULL_IFILE) ? &anchor : int_ifile(h); + if (p->h_prev == &anchor) + return (NULL_IFILE); + return (ext_ifile(p->h_prev)); +} + +/* + * Return a different ifile from the given one. + */ + public IFILE +getoff_ifile(ifile) + IFILE ifile; +{ + IFILE newifile; + + if ((newifile = prev_ifile(ifile)) != NULL_IFILE) + return (newifile); + if ((newifile = next_ifile(ifile)) != NULL_IFILE) + return (newifile); + return (NULL_IFILE); +} + +/* + * Return the number of ifiles. + */ + public int +nifile() +{ + return (ifiles); +} + +/* + * Find an ifile structure, given a filename. + */ + static struct ifile * +find_ifile(filename) + char *filename; +{ + register struct ifile *p; + + for (p = anchor.h_next; p != &anchor; p = p->h_next) + if (strcmp(filename, p->h_filename) == 0) + return (p); + return (NULL); +} + +/* + * Get the ifile associated with a filename. + * If the filename has not been seen before, + * insert the new ifile after "prev" in the list. + */ + public IFILE +get_ifile(filename, prev) + char *filename; + IFILE prev; +{ + register struct ifile *p; + + if ((p = find_ifile(filename)) == NULL) + p = new_ifile(filename, int_ifile(prev)); + return (ext_ifile(p)); +} + +/* + * Get the filename associated with a ifile. + */ + public char * +get_filename(ifile) + IFILE ifile; +{ + if (ifile == NULL) + return (NULL); + return (int_ifile(ifile)->h_filename); +} + +/* + * Get the index of the file associated with a ifile. + */ + public int +get_index(ifile) + IFILE ifile; +{ + return (int_ifile(ifile)->h_index); +} + +/* + * Save the file position to be associated with a given file. + */ + public void +store_pos(ifile, scrpos) + IFILE ifile; + struct scrpos *scrpos; +{ + int_ifile(ifile)->h_scrpos = *scrpos; +} + +/* + * Recall the file position associated with a file. + * If no position has been associated with the file, return NULL_POSITION. + */ + public void +get_pos(ifile, scrpos) + IFILE ifile; + struct scrpos *scrpos; +{ + *scrpos = int_ifile(ifile)->h_scrpos; +} + +/* + * Mark the ifile as "opened". + */ + public void +set_open(ifile) + IFILE ifile; +{ + int_ifile(ifile)->h_opened = 1; +} + +/* + * Return whether the ifile has been opened previously. + */ + public int +opened(ifile) + IFILE ifile; +{ + return (int_ifile(ifile)->h_opened); +} + + public void +hold_ifile(ifile, incr) + IFILE ifile; + int incr; +{ + int_ifile(ifile)->h_hold += incr; +} + + public int +held_ifile(ifile) + IFILE ifile; +{ + return (int_ifile(ifile)->h_hold); +} + + public void * +get_filestate(ifile) + IFILE ifile; +{ + return (int_ifile(ifile)->h_filestate); +} + + public void +set_filestate(ifile, filestate) + IFILE ifile; + void *filestate; +{ + int_ifile(ifile)->h_filestate = filestate; +} + +#if 0 + public void +if_dump() +{ + register struct ifile *p; + + for (p = anchor.h_next; p != &anchor; p = p->h_next) + { + printf("%x: %d. <%s> pos %d,%x\n", + p, p->h_index, p->h_filename, + p->h_scrpos.ln, p->h_scrpos.pos); + ch_dump(p->h_filestate); + } +} +#endif diff --git a/commands/less/less/input.c b/commands/less/less/input.c new file mode 100644 index 000000000..645cf23ca --- /dev/null +++ b/commands/less/less/input.c @@ -0,0 +1,406 @@ +/* + * Copyright (C) 1984-2005 Mark Nudelman + * + * You may distribute under the terms of either the GNU General Public + * License or the Less License, as specified in the README file. + * + * For more information about less, or for information on how to + * contact the author, see the README file. + */ + + +/* + * High level routines dealing with getting lines of input + * from the file being viewed. + * + * When we speak of "lines" here, we mean PRINTABLE lines; + * lines processed with respect to the screen width. + * We use the term "raw line" to refer to lines simply + * delimited by newlines; not processed with respect to screen width. + */ + +#include "less.h" + +extern int squeeze; +extern int chopline; +extern int hshift; +extern int quit_if_one_screen; +extern int sigs; +extern int ignore_eoi; +extern int status_col; +extern POSITION start_attnpos; +extern POSITION end_attnpos; +#if HILITE_SEARCH +extern int hilite_search; +extern int size_linebuf; +#endif + +/* + * Get the next line. + * A "current" position is passed and a "new" position is returned. + * The current position is the position of the first character of + * a line. The new position is the position of the first character + * of the NEXT line. The line obtained is the line starting at curr_pos. + */ + public POSITION +forw_line(curr_pos) + POSITION curr_pos; +{ + POSITION base_pos; + POSITION new_pos; + register int c; + int blankline; + int endline; + int backchars; + + if (curr_pos == NULL_POSITION) + { + null_line(); + return (NULL_POSITION); + } +#if HILITE_SEARCH + if (hilite_search == OPT_ONPLUS || status_col) + /* + * If we are ignoring EOI (command F), only prepare + * one line ahead, to avoid getting stuck waiting for + * slow data without displaying the data we already have. + * If we're not ignoring EOI, we *could* do the same, but + * for efficiency we prepare several lines ahead at once. + */ + prep_hilite(curr_pos, curr_pos + 3*size_linebuf, + ignore_eoi ? 1 : -1); +#endif + if (ch_seek(curr_pos)) + { + null_line(); + return (NULL_POSITION); + } + + base_pos = curr_pos; + for (;;) + { + if (ABORT_SIGS()) + { + null_line(); + return (NULL_POSITION); + } + c = ch_back_get(); + if (c == EOI) + break; + if (c == '\n') + { + (void) ch_forw_get(); + break; + } + --base_pos; + } + + prewind(); + plinenum(base_pos); + (void) ch_seek(base_pos); + while (base_pos < curr_pos) + { + if (ABORT_SIGS()) + { + null_line(); + return (NULL_POSITION); + } + c = ch_forw_get(); + backchars = pappend(c, base_pos); + base_pos++; + if (backchars > 0) + { + pshift_all(); + base_pos -= backchars; + while (--backchars >= 0) + (void) ch_back_get(); + } + } + (void) pflushmbc(); + pshift_all(); + + c = ch_forw_get(); + if (c == EOI) + { + null_line(); + return (NULL_POSITION); + } + blankline = (c == '\n' || c == '\r'); + + for (;;) + { + if (ABORT_SIGS()) + { + null_line(); + return (NULL_POSITION); + } + if (c == '\n' || c == EOI) + { + /* + * End of the line. + */ + backchars = pflushmbc(); + new_pos = ch_tell(); + if (backchars > 0 && !chopline && hshift == 0) + { + new_pos -= backchars + 1; + endline = FALSE; + } else + endline = TRUE; + break; + } + if (c != '\r') + blankline = 0; + + /* + * Append the char to the line and get the next char. + */ + backchars = pappend(c, ch_tell()-1); + if (backchars > 0) + { + /* + * The char won't fit in the line; the line + * is too long to print in the screen width. + * End the line here. + */ + if (chopline || hshift > 0) + { + do + { + c = ch_forw_get(); + } while (c != '\n' && c != EOI); + new_pos = ch_tell(); + endline = TRUE; + quit_if_one_screen = FALSE; + } else + { + new_pos = ch_tell() - backchars; + endline = FALSE; + } + break; + } + c = ch_forw_get(); + } + pdone(endline); + + if (squeeze && blankline) + { + /* + * This line is blank. + * Skip down to the last contiguous blank line + * and pretend it is the one which we are returning. + */ + while ((c = ch_forw_get()) == '\n' || c == '\r') + if (ABORT_SIGS()) + { + null_line(); + return (NULL_POSITION); + } + if (c != EOI) + (void) ch_back_get(); + new_pos = ch_tell(); + } + + return (new_pos); +} + +/* + * Get the previous line. + * A "current" position is passed and a "new" position is returned. + * The current position is the position of the first character of + * a line. The new position is the position of the first character + * of the PREVIOUS line. The line obtained is the one starting at new_pos. + */ + public POSITION +back_line(curr_pos) + POSITION curr_pos; +{ + POSITION new_pos, begin_new_pos; + int c; + int endline; + int backchars; + + if (curr_pos == NULL_POSITION || curr_pos <= ch_zero()) + { + null_line(); + return (NULL_POSITION); + } +#if HILITE_SEARCH + if (hilite_search == OPT_ONPLUS || status_col) + prep_hilite((curr_pos < 3*size_linebuf) ? + 0 : curr_pos - 3*size_linebuf, curr_pos, -1); +#endif + if (ch_seek(curr_pos-1)) + { + null_line(); + return (NULL_POSITION); + } + + if (squeeze) + { + /* + * Find out if the "current" line was blank. + */ + (void) ch_forw_get(); /* Skip the newline */ + c = ch_forw_get(); /* First char of "current" line */ + (void) ch_back_get(); /* Restore our position */ + (void) ch_back_get(); + + if (c == '\n' || c == '\r') + { + /* + * The "current" line was blank. + * Skip over any preceding blank lines, + * since we skipped them in forw_line(). + */ + while ((c = ch_back_get()) == '\n' || c == '\r') + if (ABORT_SIGS()) + { + null_line(); + return (NULL_POSITION); + } + if (c == EOI) + { + null_line(); + return (NULL_POSITION); + } + (void) ch_forw_get(); + } + } + + /* + * Scan backwards until we hit the beginning of the line. + */ + for (;;) + { + if (ABORT_SIGS()) + { + null_line(); + return (NULL_POSITION); + } + c = ch_back_get(); + if (c == '\n') + { + /* + * This is the newline ending the previous line. + * We have hit the beginning of the line. + */ + new_pos = ch_tell() + 1; + break; + } + if (c == EOI) + { + /* + * We have hit the beginning of the file. + * This must be the first line in the file. + * This must, of course, be the beginning of the line. + */ + new_pos = ch_tell(); + break; + } + } + + /* + * Now scan forwards from the beginning of this line. + * We keep discarding "printable lines" (based on screen width) + * until we reach the curr_pos. + * + * {{ This algorithm is pretty inefficient if the lines + * are much longer than the screen width, + * but I don't know of any better way. }} + */ + if (ch_seek(new_pos)) + { + null_line(); + return (NULL_POSITION); + } + endline = FALSE; + prewind(); + plinenum(new_pos); + loop: + begin_new_pos = new_pos; + (void) ch_seek(new_pos); + + do + { + c = ch_forw_get(); + if (c == EOI || ABORT_SIGS()) + { + null_line(); + return (NULL_POSITION); + } + new_pos++; + if (c == '\n') + { + backchars = pflushmbc(); + if (backchars > 0 && !chopline && hshift == 0) + { + backchars++; + goto shift; + } + endline = TRUE; + break; + } + backchars = pappend(c, ch_tell()-1); + if (backchars > 0) + { + /* + * Got a full printable line, but we haven't + * reached our curr_pos yet. Discard the line + * and start a new one. + */ + if (chopline || hshift > 0) + { + endline = TRUE; + quit_if_one_screen = FALSE; + break; + } + shift: + pshift_all(); + while (backchars-- > 0) + { + (void) ch_back_get(); + new_pos--; + } + goto loop; + } + } while (new_pos < curr_pos); + + pdone(endline); + + return (begin_new_pos); +} + +/* + * Set attnpos. + */ + public void +set_attnpos(pos) + POSITION pos; +{ + int c; + + if (pos != NULL_POSITION) + { + if (ch_seek(pos)) + return; + for (;;) + { + c = ch_forw_get(); + if (c == EOI) + return; + if (c != '\n' && c != '\r') + break; + pos++; + } + } + start_attnpos = pos; + for (;;) + { + c = ch_forw_get(); + pos++; + if (c == EOI || c == '\n' || c == '\r') + break; + } + end_attnpos = pos; +} diff --git a/commands/less/less/jump.c b/commands/less/less/jump.c new file mode 100644 index 000000000..38132ccf9 --- /dev/null +++ b/commands/less/less/jump.c @@ -0,0 +1,291 @@ +/* + * Copyright (C) 1984-2005 Mark Nudelman + * + * You may distribute under the terms of either the GNU General Public + * License or the Less License, as specified in the README file. + * + * For more information about less, or for information on how to + * contact the author, see the README file. + */ + + +/* + * Routines which jump to a new location in the file. + */ + +#include "less.h" +#include "position.h" + +extern int hit_eof; +extern int jump_sline; +extern int squished; +extern int screen_trashed; +extern int sc_width, sc_height; +extern int show_attn; +extern int top_scroll; + +/* + * Jump to the end of the file. + */ + public void +jump_forw() +{ + POSITION pos; + + if (ch_end_seek()) + { + error("Cannot seek to end of file", NULL_PARG); + return; + } + /* + * Position the last line in the file at the last screen line. + * Go back one line from the end of the file + * to get to the beginning of the last line. + */ + pos = back_line(ch_tell()); + if (pos == NULL_POSITION) + jump_loc((POSITION)0, sc_height-1); + else + jump_loc(pos, sc_height-1); +} + +/* + * Jump to line n in the file. + */ + public void +jump_back(linenum) + LINENUM linenum; +{ + POSITION pos; + PARG parg; + + /* + * Find the position of the specified line. + * If we can seek there, just jump to it. + * If we can't seek, but we're trying to go to line number 1, + * use ch_beg_seek() to get as close as we can. + */ + pos = find_pos(linenum); + if (pos != NULL_POSITION && ch_seek(pos) == 0) + { + if (show_attn) + set_attnpos(pos); + jump_loc(pos, jump_sline); + } else if (linenum <= 1 && ch_beg_seek() == 0) + { + jump_loc(ch_tell(), jump_sline); + error("Cannot seek to beginning of file", NULL_PARG); + } else + { + parg.p_linenum = linenum; + error("Cannot seek to line number %n", &parg); + } +} + +/* + * Repaint the screen. + */ + public void +repaint() +{ + struct scrpos scrpos; + /* + * Start at the line currently at the top of the screen + * and redisplay the screen. + */ + get_scrpos(&scrpos); + pos_clear(); + jump_loc(scrpos.pos, scrpos.ln); +} + +/* + * Jump to a specified percentage into the file. + */ + public void +jump_percent(percent) + int percent; +{ + POSITION pos, len; + + /* + * Determine the position in the file + * (the specified percentage of the file's length). + */ + if ((len = ch_length()) == NULL_POSITION) + { + ierror("Determining length of file", NULL_PARG); + ch_end_seek(); + } + if ((len = ch_length()) == NULL_POSITION) + { + error("Don't know length of file", NULL_PARG); + return; + } + pos = percent_pos(len, percent); + if (pos >= len) + pos = len-1; + + jump_line_loc(pos, jump_sline); +} + +/* + * Jump to a specified position in the file. + * Like jump_loc, but the position need not be + * the first character in a line. + */ + public void +jump_line_loc(pos, sline) + POSITION pos; + int sline; +{ + int c; + + if (ch_seek(pos) == 0) + { + /* + * Back up to the beginning of the line. + */ + while ((c = ch_back_get()) != '\n' && c != EOI) + ; + if (c == '\n') + (void) ch_forw_get(); + pos = ch_tell(); + } + if (show_attn) + set_attnpos(pos); + jump_loc(pos, sline); +} + +/* + * Jump to a specified position in the file. + * The position must be the first character in a line. + * Place the target line on a specified line on the screen. + */ + public void +jump_loc(pos, sline) + POSITION pos; + int sline; +{ + register int nline; + POSITION tpos; + POSITION bpos; + + /* + * Normalize sline. + */ + sline = adjsline(sline); + + if ((nline = onscreen(pos)) >= 0) + { + /* + * The line is currently displayed. + * Just scroll there. + */ + nline -= sline; + if (nline > 0) + forw(nline, position(BOTTOM_PLUS_ONE), 1, 0, 0); + else + back(-nline, position(TOP), 1, 0); + if (show_attn) + repaint_hilite(1); + return; + } + + /* + * Line is not on screen. + * Seek to the desired location. + */ + if (ch_seek(pos)) + { + error("Cannot seek to that file position", NULL_PARG); + return; + } + + /* + * See if the desired line is before or after + * the currently displayed screen. + */ + tpos = position(TOP); + bpos = position(BOTTOM_PLUS_ONE); + if (tpos == NULL_POSITION || pos >= tpos) + { + /* + * The desired line is after the current screen. + * Move back in the file far enough so that we can + * call forw() and put the desired line at the + * sline-th line on the screen. + */ + for (nline = 0; nline < sline; nline++) + { + if (bpos != NULL_POSITION && pos <= bpos) + { + /* + * Surprise! The desired line is + * close enough to the current screen + * that we can just scroll there after all. + */ + forw(sc_height-sline+nline-1, bpos, 1, 0, 0); + if (show_attn) + repaint_hilite(1); + return; + } + pos = back_line(pos); + if (pos == NULL_POSITION) + { + /* + * Oops. Ran into the beginning of the file. + * Exit the loop here and rely on forw() + * below to draw the required number of + * blank lines at the top of the screen. + */ + break; + } + } + lastmark(); + hit_eof = 0; + squished = 0; + screen_trashed = 0; + forw(sc_height-1, pos, 1, 0, sline-nline); + } else + { + /* + * The desired line is before the current screen. + * Move forward in the file far enough so that we + * can call back() and put the desired line at the + * sline-th line on the screen. + */ + for (nline = sline; nline < sc_height - 1; nline++) + { + pos = forw_line(pos); + if (pos == NULL_POSITION) + { + /* + * Ran into end of file. + * This shouldn't normally happen, + * but may if there is some kind of read error. + */ + break; + } + if (pos >= tpos) + { + /* + * Surprise! The desired line is + * close enough to the current screen + * that we can just scroll there after all. + */ + back(nline+1, tpos, 1, 0); + if (show_attn) + repaint_hilite(1); + return; + } + } + lastmark(); + if (top_scroll != OPT_ON) + clear(); + else + home(); + screen_trashed = 0; + add_back_pos(pos); + back(sc_height-1, pos, 1, 0); + } +} diff --git a/commands/less/less/less.1 b/commands/less/less/less.1 new file mode 100644 index 000000000..e74a2ca83 --- /dev/null +++ b/commands/less/less/less.1 @@ -0,0 +1,1663 @@ +.\" $NetBSD: less.1,v 1.17 2006/12/17 16:16:53 jmmv Exp $ +.\" +.TH LESS 1 "Version 394: 03 Dec 2005" +.SH NAME +less \- opposite of more (a filter for browsing text files) +.SH SYNOPSIS +.B "less \-?" +.br +.B "less \-\-help" +.br +.B "less \-V" +.br +.B "less \-\-version" +.br +.B "less [\-[+]aBcCdeEfFgGiIJKLmMnNqQrRsSuUVwWX~]" +.br +.B " [\-b \fIspace\fP] [\-h \fIlines\fP] [\-j \fIline\fP] [\-k \fIkeyfile\fP]" +.br +.B " [\-{oO} \fIlogfile\fP] [\-p \fIpattern\fP] [\-P \fIprompt\fP] [\-t \fItag\fP]" +.br +.B " [\-T \fItagsfile\fP] [\-x \fItab\fP,...] [\-y \fIlines\fP] [\-[z] \fIlines\fP]" +.br +.B " [\-# \fIshift\fP] [+[+]\fIcmd\fP] [\-\-] [\fIfilename\fP]..." +.br +.B "more [options]" +.br +.B "page [options]" +.br +(See the OPTIONS section for alternate option syntax with long option names.) + +.SH DESCRIPTION +.I Less +is a program similar to +.I more +(1), a filter that shows text one page at a time. +In NetBSD the two utilities are implemented by the same binary but they +expose slightly different behavior. +Their differences are detailed below: +.IP \(bu 4 +.I less +allows backward movement in the file as well as forward movement. +.IP \(bu 4 +.I less +does not have to read the entire input file before starting, +so with large input files it starts up faster than text editors like +.I vi +(1). +.IP \(bu 4 +.I more +ignores * and @ in search commands. +.IP \(bu 4 +.I less +does not clear the screen or squish it to the bottom, for the first +page, or when exiting. +.IP \(bu 4 +.I more +sets the -E -m -G -f flags automatically. +.IP \(bu 4 +.I more +uses $MORE instead of $LESS for extra options. +.PP +.I Less +uses termcap (or terminfo on some systems), +so it can run on a variety of terminals. +There is even limited support for hardcopy terminals. +(On a hardcopy terminal, lines which should be printed at the top +of the screen are prefixed with a caret.) +.PP +Commands are based on both +.I more +and +.I vi. +Commands may be preceded by a decimal number, +called N in the descriptions below. +The number is used by some commands, as indicated. + +.SH COMMANDS +In the following descriptions, ^X means control-X. +ESC stands for the ESCAPE key; for example ESC-v means the +two character sequence "ESCAPE", then "v". +.IP "h or H" +Help: display a summary of these commands. +If you forget all the other commands, remember this one. +.IP "SPACE or ^V or f or ^F" +Scroll forward N lines, default one window (see option \-z below). +If N is more than the screen size, only the final screenful is displayed. +Warning: some systems use ^V as a special literalization character. +.IP "z" +Like SPACE, but if N is specified, it becomes the new window size. +.IP "ESC-SPACE" +Like SPACE, but scrolls a full screenful, even if it reaches +end-of-file in the process. +.IP "RETURN or ^N or e or ^E or j or ^J" +Scroll forward N lines, default 1. +The entire N lines are displayed, even if N is more than the screen size. +.IP "d or ^D" +Scroll forward N lines, default one half of the screen size. +If N is specified, it becomes the new default for +subsequent d and u commands. +.IP "b or ^B or ESC-v" +Scroll backward N lines, default one window (see option \-z below). +If N is more than the screen size, only the final screenful is displayed. +.IP "w" +Like ESC-v, but if N is specified, it becomes the new window size. +.IP "y or ^Y or ^P or k or ^K" +Scroll backward N lines, default 1. +The entire N lines are displayed, even if N is more than the screen size. +Warning: some systems use ^Y as a special job control character. +.IP "u or ^U" +Scroll backward N lines, default one half of the screen size. +If N is specified, it becomes the new default for +subsequent d and u commands. +.IP "ESC-) or RIGHTARROW" +Scroll horizontally right N characters, default half the screen width +(see the \-# option). +If a number N is specified, it becomes the default for future RIGHTARROW +and LEFTARROW commands. +While the text is scrolled, it acts as though the \-S option +(chop lines) were in effect. +.IP "ESC-( or LEFTARROW" +Scroll horizontally left N characters, default half the screen width +(see the \-# option). +If a number N is specified, it becomes the default for future RIGHTARROW +and LEFTARROW commands. +.IP "r or ^R or ^L" +Repaint the screen. +.IP R +Repaint the screen, discarding any buffered input. +Useful if the file is changing while it is being viewed. +.IP "F" +Scroll forward, and keep trying to read when the +end of file is reached. +Normally this command would be used when already at the end of the file. +It is a way to monitor the tail of a file which is growing +while it is being viewed. +(The behavior is similar to the "tail \-f" command.) +.IP "g or \*[Lt] or ESC-\*[Lt]" +Go to line N in the file, default 1 (beginning of file). +(Warning: this may be slow if N is large.) +.IP "G or \*[Gt] or ESC-\*[Gt]" +Go to line N in the file, default the end of the file. +(Warning: this may be slow if N is large, +or if N is not specified and +standard input, rather than a file, is being read.) +.IP "p or %" +Go to a position N percent into the file. +N should be between 0 and 100. +.IP "{" +If a left curly bracket appears in the top line displayed +on the screen, +the { command will go to the matching right curly bracket. +The matching right curly bracket is positioned on the bottom +line of the screen. +If there is more than one left curly bracket on the top line, +a number N may be used to specify the N-th bracket on the line. +.IP "}" +If a right curly bracket appears in the bottom line displayed +on the screen, +the } command will go to the matching left curly bracket. +The matching left curly bracket is positioned on the top +line of the screen. +If there is more than one right curly bracket on the top line, +a number N may be used to specify the N-th bracket on the line. +.IP "(" +Like {, but applies to parentheses rather than curly brackets. +.IP ")" +Like }, but applies to parentheses rather than curly brackets. +.IP "[" +Like {, but applies to square brackets rather than curly brackets. +.IP "]" +Like }, but applies to square brackets rather than curly brackets. +.IP "ESC-^F" +Followed by two characters, +acts like {, but uses the two characters as open and close brackets, +respectively. +For example, "ESC ^F \*[Lt] \*[Gt]" could be used to +go forward to the \*[Gt] which matches the \*[Lt] in the top displayed line. +.IP "ESC-^B" +Followed by two characters, +acts like }, but uses the two characters as open and close brackets, +respectively. +For example, "ESC ^B \*[Lt] \*[Gt]" could be used to +go backward to the \*[Lt] which matches the \*[Gt] in the bottom displayed line. +.IP m +Followed by any lowercase letter, +marks the current position with that letter. +.IP "'" +(Single quote.) +Followed by any lowercase letter, returns to the position which +was previously marked with that letter. +Followed by another single quote, returns to the position at +which the last "large" movement command was executed. +Followed by a ^ or $, jumps to the beginning or end of the +file respectively. +Marks are preserved when a new file is examined, +so the ' command can be used to switch between input files. +.IP "^X^X" +Same as single quote. +.IP /pattern +Search forward in the file for the N-th line containing the pattern. +N defaults to 1. +When invoked as less, the pattern is an extended regular expression. +Otherwise, the pattern is a basic regular expression, as recognized by +.I ed. +The search starts at the second line displayed +(but see the \-a and \-j options, which change this). +.sp +Certain characters are special +if entered at the beginning of the pattern; +they modify the type of search rather than become part of the pattern: +.RS +.IP "^N or !" +Search for lines which do NOT match the pattern. +.IP "^E or *" +Search multiple files. +That is, if the search reaches the END of the current file +without finding a match, +the search continues in the next file in the command line list. +The * modifier is available when invoked as less only. +.IP "^F or @" +Begin the search at the first line of the FIRST file +in the command line list, +regardless of what is currently displayed on the screen +or the settings of the \-a or \-j options. +The @ modifier is available when invoked as less only. +.IP "^K" +Highlight any text which matches the pattern on the current screen, +but don't move to the first match (KEEP current position). +.IP "^R" +Don't interpret regular expression metacharacters; +that is, do a simple textual comparison. +.RE +.IP ?pattern +Search backward in the file for the N-th line containing the pattern. +The search starts at the line immediately before the top line displayed. +.sp +Certain characters are special as in the / command: +.RS +.IP "^N or !" +Search for lines which do NOT match the pattern. +.IP "^E or *" +Search multiple files. +That is, if the search reaches the beginning of the current file +without finding a match, +the search continues in the previous file in the command line list. +.IP "^F or @" +Begin the search at the last line of the last file +in the command line list, +regardless of what is currently displayed on the screen +or the settings of the \-a or \-j options. +.IP "^K" +As in forward searches. +.IP "^R" +As in forward searches. +.RE +.IP "ESC-/pattern" +Same as "/*". +.IP "ESC-?pattern" +Same as "?*". +.IP n +Repeat previous search, for N-th line containing the last pattern. +If the previous search was modified by ^N, the search is made for the +N-th line NOT containing the pattern. +If the previous search was modified by ^E, the search continues +in the next (or previous) file if not satisfied in the current file. +If the previous search was modified by ^R, the search is done +without using regular expressions. +There is no effect if the previous search was modified by ^F or ^K. +.IP N +Repeat previous search, but in the reverse direction. +.IP "ESC-n" +Repeat previous search, but crossing file boundaries. +The effect is as if the previous search were modified by *. +.IP "ESC-N" +Repeat previous search, but in the reverse direction +and crossing file boundaries. +.IP "ESC-u" +Undo search highlighting. +Turn off highlighting of strings matching the current search pattern. +If highlighting is already off because of a previous ESC-u command, +turn highlighting back on. +Any search command will also turn highlighting back on. +(Highlighting can also be disabled by toggling the \-G option; +in that case search commands do not turn highlighting back on.) +.IP ":e [filename]" +Examine a new file. +If the filename is missing, the "current" file (see the :n and :p commands +below) from the list of files in the command line is re-examined. +A percent sign (%) in the filename is replaced by the name of the +current file. +A pound sign (#) is replaced by the name of the previously examined file. +However, two consecutive percent signs are simply +replaced with a single percent sign. +This allows you to enter a filename that contains a percent sign +in the name. +Similarly, two consecutive pound signs are replaced with a single pound sign. +The filename is inserted into the command line list of files +so that it can be seen by subsequent :n and :p commands. +If the filename consists of several files, they are all inserted into +the list of files and the first one is examined. +If the filename contains one or more spaces, +the entire filename should be enclosed in double quotes +(also see the \-" option). +.IP "^X^V or E" +Same as :e. +Warning: some systems use ^V as a special literalization character. +On such systems, you may not be able to use ^V. +.IP ":n" +Examine the next file (from the list of files given in the command line). +If a number N is specified, the N-th next file is examined. +.IP ":p" +Examine the previous file in the command line list. +If a number N is specified, the N-th previous file is examined. +.IP ":x" +Examine the first file in the command line list. +If a number N is specified, the N-th file in the list is examined. +.IP ":d" +Remove the current file from the list of files. +.IP "t" +Go to the next tag, if there were more than one matches for the current tag. +See the \-t option for more details about tags. +.IP "T" +Go to the previous tag, if there were more than one matches for the current tag. +.IP "= or ^G or :f" +Prints some information about the file being viewed, +including its name +and the line number and byte offset of the bottom line being displayed. +If possible, it also prints the length of the file, +the number of lines in the file +and the percent of the file above the last displayed line. +.IP \- +Followed by one of the command line option letters (see OPTIONS below), +this will change the setting of that option +and print a message describing the new setting. +If a ^P (CONTROL-P) is entered immediately after the dash, +the setting of the option is changed but no message is printed. +If the option letter has a numeric value (such as \-b or \-h), +or a string value (such as \-P or \-t), +a new value may be entered after the option letter. +If no new value is entered, a message describing +the current setting is printed and nothing is changed. +.IP \-\- +Like the \- command, but takes a long option name (see OPTIONS below) +rather than a single option letter. +You must press RETURN after typing the option name. +A ^P immediately after the second dash suppresses printing of a +message describing the new setting, as in the \- command. +.IP \-+ +Followed by one of the command line option letters +this will reset the option to its default setting +and print a message describing the new setting. +(The "\-+\fIX\fP" command does the same thing +as "\-+\fIX\fP" on the command line.) +This does not work for string-valued options. +.IP \-\-+ +Like the \-+ command, but takes a long option name +rather than a single option letter. +.IP \-! +Followed by one of the command line option letters, +this will reset the option to the "opposite" of its default setting +and print a message describing the new setting. +This does not work for numeric or string-valued options. +.IP \-\-! +Like the \-! command, but takes a long option name +rather than a single option letter. +.IP _ +(Underscore.) +Followed by one of the command line option letters, +this will print a message describing the current setting of that option. +The setting of the option is not changed. +.IP __ +(Double underscore.) +Like the _ (underscore) command, but takes a long option name +rather than a single option letter. +You must press RETURN after typing the option name. +.IP +cmd +Causes the specified cmd to be executed each time a new file is examined. +For example, +G causes +.I less +to initially display each file starting at the end +rather than the beginning. +.IP V +Prints the version number of +.I less +being run. +.IP "q or Q or :q or :Q or ZZ" +Exits +.I less. +.PP +The following +four +commands may or may not be valid, depending on your particular installation. +.PP +.IP v +Invokes an editor to edit the current file being viewed. +The editor is taken from the environment variable VISUAL if defined, +or EDITOR if VISUAL is not defined, +or defaults to "vi" if neither VISUAL nor EDITOR is defined. +See also the discussion of LESSEDIT under the section on PROMPTS below. +.IP "! shell-command" +Invokes a shell to run the shell-command given. +A percent sign (%) in the command is replaced by the name of the +current file. +A pound sign (#) is replaced by the name of the previously examined file. +"!!" repeats the last shell command. +"!" with no shell command simply invokes a shell. +On Unix systems, the shell is taken from the environment variable SHELL, +or defaults to "sh". +On MS-DOS and OS/2 systems, the shell is the normal command processor. +.IP "| \*[Lt]m\*[Gt] shell-command" +\*[Lt]m\*[Gt] represents any mark letter. +Pipes a section of the input file to the given shell command. +The section of the file to be piped is between the first line on +the current screen and the position marked by the letter. +\*[Lt]m\*[Gt] may also be ^ or $ to indicate beginning or end of file respectively. +If \*[Lt]m\*[Gt] is . or newline, the current screen is piped. +.IP "s filename" +Save the input to a file. +This only works if the input is a pipe, not an ordinary file. +.PP +.SH OPTIONS +Command line options are described below. +Most options may be changed while +.I less +is running, via the "\-" command. +.PP +Most options may be given in one of two forms: +either a dash followed by a single letter, +or two dashes followed by a long option name. +A long option name may be abbreviated as long as +the abbreviation is unambiguous. +For example, \-\-quit-at-eof may be abbreviated \-\-quit, but not +--qui, since both \-\-quit-at-eof and \-\-quiet begin with \-\-qui. +Some long option names are in uppercase, such as \-\-QUIT-AT-EOF, as +distinct from \-\-quit-at-eof. +Such option names need only have their first letter capitalized; +the remainder of the name may be in either case. +For example, \-\-Quit-at-eof is equivalent to \-\-QUIT-AT-EOF. +.PP +Options are also taken from the environment variable "LESS". +For example, +to avoid typing "less \-options ..." each time +.I less +is invoked, you might tell +.I csh: +.sp +setenv LESS "-options" +.sp +or if you use +.I sh: +.sp +LESS="-options"; export LESS +.sp +On MS-DOS, you don't need the quotes, but you should replace any +percent signs in the options string by double percent signs. +.sp +The environment variable is parsed before the command line, +so command line options override the LESS environment variable. +If an option appears in the LESS variable, it can be reset +to its default value on the command line by beginning the command +line option with "\-+". +.sp +For options like \-P or \-D which take a following string, +a dollar sign ($) must be used to signal the end of the string. +For example, to set two \-D options on MS-DOS, you must have +a dollar sign between them, like this: +.sp +LESS="-Dn9.1$-Ds4.1" +.sp +.IP "\-? or \-\-help" +This option displays a summary of the commands accepted by +.I less +(the same as the h command). +(Depending on how your shell interprets the question mark, +it may be necessary to quote the question mark, thus: "\-\e?".) +.IP "\-a or \-\-search-skip-screen" +Causes searches to start after the last line +displayed on the screen, +thus skipping all lines displayed on the screen. +By default, searches start at the second line on the screen +(or after the last found line; see the \-j option). +.IP "\-b\fIn\fP or \-\-buffers=\fIn\fP" +Specifies the amount of buffer space +.I less +will use for each file, in units of kilobytes (1024 bytes). +By default 64K of buffer space is used for each file +(unless the file is a pipe; see the \-B option). +The \-b option specifies instead that \fIn\fP kilobytes of +buffer space should be used for each file. +If \fIn\fP is \-1, buffer space is unlimited; that is, +the entire file is read into memory. +.IP "\-B or \-\-auto-buffers" +By default, when data is read from a pipe, +buffers are allocated automatically as needed. +If a large amount of data is read from the pipe, this can cause +a large amount of memory to be allocated. +The \-B option disables this automatic allocation of buffers for pipes, +so that only 64K +(or the amount of space specified by the \-b option) +is used for the pipe. +Warning: use of \-B can result in erroneous display, since only the +most recently viewed part of the file is kept in memory; +any earlier data is lost. +.IP "\-c or \-\-clear-screen" +Causes full screen repaints to be painted from the top line down. +By default, +full screen repaints are done by scrolling from the bottom of the screen. +.IP "\-C or \-\-CLEAR-SCREEN" +The \-C option is like \-c, but the screen is cleared before it is repainted. +.IP "\-d +The -d option causes the default prompt to include the basic directions +``[Press space to continue, 'q' to quit.]''. The -d +option also causes the message ``[Press 'h' for instructions.]'' to be +displayed when an invalid command is entered (normally, the bell is +rung). This option is useful in environments where users may not be +experienced with pagers. +.IP \-\-dumb" +The \-\-dumb option suppresses the error message +normally displayed if the terminal is dumb; +that is, lacks some important capability, +such as the ability to clear the screen or scroll backward. +The \-\-dumb option does not otherwise change the behavior of +.I less +on a dumb terminal. +.IP "\-D\fBx\fP\fIcolor\fP or \-\-color=\fBx\fP\fIcolor\fP" +[MS-DOS only] +Sets the color of the text displayed. +\fBx\fP is a single character which selects the type of text whose color is +being set: n=normal, s=standout, d=bold, u=underlined, k=blink. +\fIcolor\fP is a pair of numbers separated by a period. +The first number selects the foreground color and the second selects +the background color of the text. +A single number \fIN\fP is the same as \fIN.0\fP. +.IP "\-e or \-\-quit-at-eof" +Causes +.I less +to automatically exit +the second time it reaches end-of-file. +By default, the only way to exit +.I less +is via the "q" command. +.IP "\-E or \-\-QUIT-AT-EOF" +Causes +.I less +to automatically exit the first time it reaches end-of-file. +.IP "\-f or \-\-force" +Forces non-regular files to be opened. +(A non-regular file is a directory or a device special file.) +Also suppresses the warning message when a binary file is opened. +By default, +.I less +will refuse to open non-regular files. +.IP "\-F or \-\-quit-if-one-screen" +Causes +.I less +to automatically exit +if the entire file can be displayed on the first screen. +.IP "\-g or \-\-hilite-search" +Normally, +.I less +will highlight ALL strings which match the last search command. +The \-g option changes this behavior to highlight only the particular string +which was found by the last search command. +This can cause +.I less +to run somewhat faster than the default. +.IP "\-G or \-\-HILITE-SEARCH" +The \-G option suppresses all highlighting of strings found by search commands. +.IP "\-h\fIn\fP or \-\-max-back-scroll=\fIn\fP" +Specifies a maximum number of lines to scroll backward. +If it is necessary to scroll backward more than \fIn\fP lines, +the screen is repainted in a forward direction instead. +(If the terminal does not have the ability to scroll +backward, \-h0 is implied.) +.IP "\-i or \-\-ignore-case" +Causes searches to ignore case; that is, +uppercase and lowercase are considered identical. +This option is ignored if any uppercase letters +appear in the search pattern; +in other words, +if a pattern contains uppercase letters, then that search does not ignore case. +.IP "\-I or \-\-IGNORE-CASE" +Like \-i, but searches ignore case even if +the pattern contains uppercase letters. +.IP "\-j\fIn\fP or \-\-jump-target=\fIn\fP" +Specifies a line on the screen where the "target" line +is to be positioned. +A target line is the object of a text search, +tag search, jump to a line number, +jump to a file percentage, or jump to a marked position. +The screen line is specified by a number: the top line on the screen +is 1, the next is 2, and so on. +The number may be negative to specify a line relative to the bottom +of the screen: the bottom line on the screen is \-1, the second +to the bottom is \-2, and so on. +If the \-j option is used, searches begin at the line immediately +after the target line. +For example, if "\-j4" is used, the target line is the +fourth line on the screen, so searches begin at the fifth line +on the screen. +.IP "\-J or \-\-status-column" +Displays a status column at the left edge of the screen. +The status column shows the lines that matched the current search. +The status column is also used if the \-w or \-W option is in effect. +.IP "\-k\fIfilename\fP or \-\-lesskey-file=\fIfilename\fP" +Causes +.I less +to open and interpret the named file as a +.I lesskey +(1) file. +Multiple \-k options may be specified. +If the LESSKEY or LESSKEY_SYSTEM environment variable is set, or +if a lesskey file is found in a standard place (see KEY BINDINGS), +it is also used as a +.I lesskey +file. +.IP "\-K or \-\-quit-on-intr" +Causes +.I less +to exit immediately when an interrupt character (usually ^C) is typed. +Normally, an interrupt character causes +.I less +to stop whatever it is doing and return to its command prompt. +.IP "\-L or \-\-no-lessopen" +Ignore the LESSOPEN environment variable +(see the INPUT PREPROCESSOR section below). +This option can be set from within \fIless\fP, +but it will apply only to files opened subsequently, not to the +file which is currently open. +.IP "\-m or \-\-long-prompt" +Causes +.I less +to prompt verbosely (like \fImore\fP), +with the percent into the file. +By default, +.I less +prompts with a colon. +.IP "\-M or \-\-LONG-PROMPT" +Causes +.I less +to prompt even more verbosely than +.I more. +.IP "\-n or \-\-line-numbers" +Suppresses line numbers. +The default (to use line numbers) may cause +.I less +to run more slowly in some cases, especially with a very large input file. +Suppressing line numbers with the \-n option will avoid this problem. +Using line numbers means: the line number will be displayed in the verbose +prompt and in the = command, +and the v command will pass the current line number to the editor +(see also the discussion of LESSEDIT in PROMPTS below). +.IP "\-N or \-\-LINE-NUMBERS" +Causes a line number to be displayed at the beginning of +each line in the display. +.IP "\-o\fIfilename\fP or \-\-log-file=\fIfilename\fP" +Causes +.I less +to copy its input to the named file as it is being viewed. +This applies only when the input file is a pipe, +not an ordinary file. +If the file already exists, +.I less +will ask for confirmation before overwriting it. +.IP "\-O\fIfilename\fP or \-\-LOG-FILE=\fIfilename\fP" +The \-O option is like \-o, but it will overwrite an existing +file without asking for confirmation. +.sp +If no log file has been specified, +the \-o and \-O options can be used from within +.I less +to specify a log file. +Without a file name, they will simply report the name of the log file. +The "s" command is equivalent to specifying \-o from within +.I less. +.IP "\-p\fIpattern\fP or \-\-pattern=\fIpattern\fP" +The \-p option on the command line is equivalent to +specifying +/\fIpattern\fP; +that is, it tells +.I less +to start at the first occurrence of \fIpattern\fP in the file. +.IP "\-P\fIprompt\fP or \-\-prompt=\fIprompt\fP" +Provides a way to tailor the three prompt +styles to your own preference. +This option would normally be put in the LESS environment +variable, rather than being typed in with each +.I less +command. +Such an option must either be the last option in the LESS variable, +or be terminated by a dollar sign. +-Ps followed by a string changes the default (short) prompt +to that string. +-Pm changes the medium (\-m) prompt. +-PM changes the long (\-M) prompt. +-Ph changes the prompt for the help screen. +-P= changes the message printed by the = command. +-Pw changes the message printed while waiting for data (in the F command). +All prompt strings consist of a sequence of +letters and special escape sequences. +See the section on PROMPTS for more details. +.IP "\-q or \-\-quiet or \-\-silent" +Causes moderately "quiet" operation: +the terminal bell is not rung +if an attempt is made to scroll past the end of the file +or before the beginning of the file. +If the terminal has a "visual bell", it is used instead. +The bell will be rung on certain other errors, +such as typing an invalid character. +The default is to ring the terminal bell in all such cases. +.IP "\-Q or \-\-QUIET or \-\-SILENT" +Causes totally "quiet" operation: +the terminal bell is never rung. +.IP "\-r or \-\-raw-control-chars" +Causes "raw" control characters to be displayed. +The default is to display control characters using the caret notation; +for example, a control-A (octal 001) is displayed as "^A". +Warning: when the \-r option is used, +.I less +cannot keep track of the actual appearance of the screen +(since this depends on how the screen responds to +each type of control character). +Thus, various display problems may result, +such as long lines being split in the wrong place. +.IP "\-R or \-\-RAW-CONTROL-CHARS" +Like \-r, but only ANSI "color" escape sequences are output in "raw" form. +Unlike \-r, the screen appearance is maintained correctly in most cases. +ANSI "color" escape sequences are sequences of the form: +.sp + ESC [ ... m +.sp +where the "..." is zero or more color specification characters +For the purpose of keeping track of screen appearance, +ANSI color escape sequences are assumed to not move the cursor. +You can make +.I less +think that characters other than "m" can end ANSI color escape sequences +by setting the environment variable LESSANSIENDCHARS to the list of +characters which can end a color escape sequence. +And you can make +.I less +think that characters other than the standard ones may appear between +the ESC and the m by setting the environment variable LESSANSIMIDCHARS +to the list of characters which can appear. +.IP "\-s or \-\-squeeze-blank-lines" +Causes consecutive blank lines to be squeezed into a single blank line. +This is useful when viewing +.I nroff +output. +.IP "\-S or \-\-chop-long-lines" +Causes lines longer than the screen width to be +chopped rather than folded. +That is, the portion of a long line that does not fit in +the screen width is not shown. +The default is to fold long lines; that is, display the remainder +on the next line. +.IP "\-t\fItag\fP or \-\-tag=\fItag\fP" +The \-t option, followed immediately by a TAG, +will edit the file containing that tag. +For this to work, tag information must be available; +for example, there may be a file in the current directory called "tags", +which was previously built by +.I ctags +(1) or an equivalent command. +If the environment variable LESSGLOBALTAGS is set, it is taken to be +the name of a command compatible with +.I global +(1), and that command is executed to find the tag. +(See http://www.gnu.org/software/global/global.html). +The \-t option may also be specified from within +.I less +(using the \- command) as a way of examining a new file. +The command ":t" is equivalent to specifying \-t from within +.I less. +.IP "\-T\fItagsfile\fP or \-\-tag-file=\fItagsfile\fP" +Specifies a tags file to be used instead of "tags". +.IP "\-u or \-\-underline-special" +Causes backspaces and carriage returns to be treated as printable characters; +that is, they are sent to the terminal when they appear in the input. +.IP "\-U or \-\-UNDERLINE-SPECIAL" +Causes backspaces, tabs and carriage returns to be +treated as control characters; +that is, they are handled as specified by the \-r option. +.sp +By default, if neither \-u nor \-U is given, +backspaces which appear adjacent to an underscore character +are treated specially: +the underlined text is displayed +using the terminal's hardware underlining capability. +Also, backspaces which appear between two identical characters +are treated specially: +the overstruck text is printed +using the terminal's hardware boldface capability. +Other backspaces are deleted, along with the preceding character. +Carriage returns immediately followed by a newline are deleted. +other carriage returns are handled as specified by the \-r option. +Text which is overstruck or underlined can be searched for +if neither \-u nor \-U is in effect. +.IP "\-V or \-\-version" +Displays the version number of +.I less. +.IP "\-w or \-\-hilite-unread" +Temporarily highlights the first "new" line after a forward movement +of a full page. +The first "new" line is the line immediately following the line previously +at the bottom of the screen. +Also highlights the target line after a g or p command. +The highlight is removed at the next command which causes movement. +The entire line is highlighted, unless the \-J option is in effect, +in which case only the status column is highlighted. +.IP "\-W or \-\-HILITE-UNREAD" +Like \-w, but temporarily highlights the first new line after any +forward movement command larger than one line. +.IP "\-x\fIn\fP,... or \-\-tabs=\fIn\fP,..." +Sets tab stops. +If only one \fIn\fP is specified, tab stops are set at multiples of \fIn\fP. +If multiple values separated by commas are specified, tab stops +are set at those positions, and then continue with the same spacing as the +last two. +For example, \fI-x9,17\fP will set tabs at positions 9, 17, 25, 33, etc. +The default for \fIn\fP is 8. +.IP "\-X or \-\-no-init" +Disables sending the termcap initialization and deinitialization strings +to the terminal. +This is sometimes desirable if the deinitialization string does +something unnecessary, like clearing the screen. +.IP "\-\-no-keypad" +Disables sending the keypad initialization and deinitialization strings +to the terminal. +This is sometimes useful if the keypad strings make the numeric +keypad behave in an undesirable manner. +.IP "\-y\fIn\fP or \-\-max-forw-scroll=\fIn\fP" +Specifies a maximum number of lines to scroll forward. +If it is necessary to scroll forward more than \fIn\fP lines, +the screen is repainted instead. +The \-c or \-C option may be used to repaint from the top of +the screen if desired. +By default, any forward movement causes scrolling. +.IP "\-[z]\fIn\fP or \-\-window=\fIn\fP" +Changes the default scrolling window size to \fIn\fP lines. +The default is one screenful. +The z and w commands can also be used to change the window size. +The "z" may be omitted for compatibility with +.I more. +If the number +.I n +is negative, it indicates +.I n +lines less than the current screen size. +For example, if the screen is 24 lines, \fI\-z-4\fP sets the +scrolling window to 20 lines. If the screen is resized to 40 lines, +the scrolling window automatically changes to 36 lines. +.IP "\-\fI\(dqcc\fP\ or\ \-\-quotes=\fIcc\fP" +Changes the filename quoting character. +This may be necessary if you are trying to name a file +which contains both spaces and quote characters. +Followed by a single character, this changes the quote character to that +character. +Filenames containing a space should then be surrounded by that character +rather than by double quotes. +Followed by two characters, changes the open quote to the first character, +and the close quote to the second character. +Filenames containing a space should then be preceded by the open quote +character and followed by the close quote character. +Note that even after the quote characters are changed, this option +remains \-" (a dash followed by a double quote). +.IP "\-~ or \-\-tilde" +Normally lines after end of file are displayed as a single tilde (~). +This option causes lines after end of file to be displayed as blank lines. +.IP "\-# or \-\-shift" +Specifies the default number of positions to scroll horizontally +in the RIGHTARROW and LEFTARROW commands. +If the number specified is zero, it sets the default number of +positions to one half of the screen width. +.IP \-\- +A command line argument of "\-\-" marks the end of option arguments. +Any arguments following this are interpreted as filenames. +This can be useful when viewing a file whose name begins with a "\-" or "+". +.IP + +If a command line option begins with \fB+\fP, +the remainder of that option is taken to be an initial command to +.I less. +For example, +G tells +.I less +to start at the end of the file rather than the beginning, +and +/xyz tells it to start at the first occurrence of "xyz" in the file. +As a special case, +\*[Lt]number\*[Gt] acts like +\*[Lt]number\*[Gt]g; +that is, it starts the display at the specified line number +(however, see the caveat under the "g" command above). +If the option starts with ++, the initial command applies to +every file being viewed, not just the first one. +The + command described previously +may also be used to set (or change) an initial command for every file. + +.SH "LINE EDITING" +When entering command line at the bottom of the screen +(for example, a filename for the :e command, +or the pattern for a search command), +certain keys can be used to manipulate the command line. +Most commands have an alternate form in [ brackets ] which can be used if +a key does not exist on a particular keyboard. +(The bracketed forms do not work in the MS-DOS version.) +Any of these special keys may be entered literally by preceding +it with the "literal" character, either ^V or ^A. +A backslash itself may also be entered literally by entering two backslashes. +.IP "LEFTARROW [ ESC-h ]" +Move the cursor one space to the left. +.IP "RIGHTARROW [ ESC-l ]" +Move the cursor one space to the right. +.IP "^LEFTARROW [ ESC-b or ESC-LEFTARROW ]" +(That is, CONTROL and LEFTARROW simultaneously.) +Move the cursor one word to the left. +.IP "^RIGHTARROW [ ESC-w or ESC-RIGHTARROW ]" +(That is, CONTROL and RIGHTARROW simultaneously.) +Move the cursor one word to the right. +.IP "HOME [ ESC-0 ]" +Move the cursor to the beginning of the line. +.IP "END [ ESC-$ ]" +Move the cursor to the end of the line. +.IP "BACKSPACE" +Delete the character to the left of the cursor, +or cancel the command if the command line is empty. +.IP "DELETE or [ ESC-x ]" +Delete the character under the cursor. +.IP "^BACKSPACE [ ESC-BACKSPACE ]" +(That is, CONTROL and BACKSPACE simultaneously.) +Delete the word to the left of the cursor. +.IP "^DELETE [ ESC-X or ESC-DELETE ]" +(That is, CONTROL and DELETE simultaneously.) +Delete the word under the cursor. +.IP "UPARROW [ ESC-k ]" +Retrieve the previous command line. +.IP "DOWNARROW [ ESC-j ]" +Retrieve the next command line. +.IP "TAB" +Complete the partial filename to the left of the cursor. +If it matches more than one filename, the first match +is entered into the command line. +Repeated TABs will cycle thru the other matching filenames. +If the completed filename is a directory, a "/" is appended to the filename. +(On MS-DOS systems, a "\e" is appended.) +The environment variable LESSSEPARATOR can be used to specify a +different character to append to a directory name. +.IP "BACKTAB [ ESC-TAB ]" +Like, TAB, but cycles in the reverse direction thru the matching filenames. +.IP "^L" +Complete the partial filename to the left of the cursor. +If it matches more than one filename, all matches are entered into +the command line (if they fit). +.IP "^U (Unix and OS/2) or ESC (MS-DOS)" +Delete the entire command line, +or cancel the command if the command line is empty. +If you have changed your line-kill character in Unix to something +other than ^U, that character is used instead of ^U. + +.SH "KEY BINDINGS" +You may define your own +.I less +commands by using the program +.I lesskey +(1) +to create a lesskey file. +This file specifies a set of command keys and an action +associated with each key. +You may also use +.I lesskey +to change the line-editing keys (see LINE EDITING), +and to set environment variables. +If the environment variable LESSKEY is set, +.I less +uses that as the name of the lesskey file. +Otherwise, +.I less +looks in a standard place for the lesskey file: +On Unix systems, +.I less +looks for a lesskey file called "$HOME/.less". +On MS-DOS and Windows systems, +.I less +looks for a lesskey file called "$HOME/_less", and if it is not found there, +then looks for a lesskey file called "_less" in any directory specified +in the PATH environment variable. +On OS/2 systems, +.I less +looks for a lesskey file called "$HOME/less.ini", and if it is not found, +then looks for a lesskey file called "less.ini" in any directory specified +in the INIT environment variable, and if it not found there, +then looks for a lesskey file called "less.ini" in any directory specified +in the PATH environment variable. +See the +.I lesskey +manual page for more details. +.P +A system-wide lesskey file may also be set up to provide key bindings. +If a key is defined in both a local lesskey file and in the +system-wide file, key bindings in the local file take precedence over +those in the system-wide file. +If the environment variable LESSKEY_SYSTEM is set, +.I less +uses that as the name of the system-wide lesskey file. +Otherwise, +.I less +looks in a standard place for the system-wide lesskey file: +On NetBSD, the system-wide lesskey file is in /etc/sysless. +On other Unix systems, the system-wide lesskey file is /usr/local/etc/sysless. +(However, if +.I less +was built with a different sysconf directory than /usr/local/etc, +that directory is where the sysless file is found.) +On MS-DOS and Windows systems, the system-wide lesskey file is c:\e_sysless. +On OS/2 systems, the system-wide lesskey file is c:\esysless.ini. + +.SH "INPUT PREPROCESSOR" +You may define an "input preprocessor" for +.I less. +Before +.I less +opens a file, it first gives your input preprocessor a chance to modify the +way the contents of the file are displayed. +An input preprocessor is simply an executable program (or shell script), +which writes the contents of the file to a different file, +called the replacement file. +The contents of the replacement file are then displayed +in place of the contents of the original file. +However, it will appear to the user as if the original file is opened; +that is, +.I less +will display the original filename as the name of the current file. +.PP +An input preprocessor receives one command line argument, the original filename, +as entered by the user. +It should create the replacement file, and when finished, +print the name of the replacement file to its standard output. +If the input preprocessor does not output a replacement filename, +.I less +uses the original file, as normal. +The input preprocessor is not called when viewing standard input. +To set up an input preprocessor, set the LESSOPEN environment variable +to a command line which will invoke your input preprocessor. +This command line should include one occurrence of the string "%s", +which will be replaced by the filename +when the input preprocessor command is invoked. +.PP +When +.I less +closes a file opened in such a way, it will call another program, +called the input postprocessor, +which may perform any desired clean-up action (such as deleting the +replacement file created by LESSOPEN). +This program receives two command line arguments, the original filename +as entered by the user, and the name of the replacement file. +To set up an input postprocessor, set the LESSCLOSE environment variable +to a command line which will invoke your input postprocessor. +It may include two occurrences of the string "%s"; +the first is replaced with the original name of the file and +the second with the name of the replacement file, +which was output by LESSOPEN. +.PP +For example, on many Unix systems, these two scripts will allow you +to keep files in compressed format, but still let +.I less +view them directly: +.PP +lessopen.sh: +.br + #! /bin/sh +.br + case "$1" in +.br + *.Z) uncompress \-c $1 \*[Gt]/tmp/less.$$ 2\*[Gt]/dev/null +.br + if [ \-s /tmp/less.$$ ]; then +.br + echo /tmp/less.$$ +.br + else +.br + rm \-f /tmp/less.$$ +.br + fi +.br + ;; +.br + esac +.PP +lessclose.sh: +.br + #! /bin/sh +.br + rm $2 +.PP +To use these scripts, put them both where they can be executed and +set LESSOPEN="lessopen.sh\ %s", and +LESSCLOSE="lessclose.sh\ %s\ %s". +More complex LESSOPEN and LESSCLOSE scripts may be written +to accept other types of compressed files, and so on. +.PP +It is also possible to set up an input preprocessor to +pipe the file data directly to +.I less, +rather than putting the data into a replacement file. +This avoids the need to decompress the entire file before +starting to view it. +An input preprocessor that works this way is called an input pipe. +An input pipe, instead of writing the name of a replacement file on +its standard output, +writes the entire contents of the replacement file on its standard output. +If the input pipe does not write any characters on its standard output, +then there is no replacement file and +.I less +uses the original file, as normal. +To use an input pipe, +make the first character in the LESSOPEN environment variable a +vertical bar (|) to signify that the input preprocessor is an input pipe. +.PP +For example, on many Unix systems, this script will work like the +previous example scripts: +.PP +lesspipe.sh: +.br + #! /bin/sh +.br + case "$1" in +.br + *.Z) uncompress \-c $1 2>/dev/null +.br + ;; +.br + esac +.br +.PP +To use this script, put it where it can be executed and set +LESSOPEN="|lesspipe.sh %s". +When an input pipe is used, a LESSCLOSE postprocessor can be used, +but it is usually not necessary since there is no replacement file +to clean up. +In this case, the replacement file name passed to the LESSCLOSE +postprocessor is "\-". + +.SH "NATIONAL CHARACTER SETS" +There are three types of characters in the input file: +.IP "normal characters" +can be displayed directly to the screen. +.IP "control characters" +should not be displayed directly, but are expected to be found +in ordinary text files (such as backspace and tab). +.IP "binary characters" +should not be displayed directly and are not expected to be found +in text files. +.PP +A "character set" is simply a description of which characters are to +be considered normal, control, and binary. +The LESSCHARSET environment variable may be used to select a character set. +Possible values for LESSCHARSET are: +.IP ascii +BS, TAB, NL, CR, and formfeed are control characters, +all chars with values between 32 and 126 are normal, +and all others are binary. +.IP iso8859 +Selects an ISO 8859 character set. +This is the same as ASCII, except characters between 160 and 255 are +treated as normal characters. +.IP latin1 +Same as iso8859. +.IP latin9 +Same as iso8859. +.IP dos +Selects a character set appropriate for MS-DOS. +.IP ebcdic +Selects an EBCDIC character set. +.IP IBM-1047 +Selects an EBCDIC character set used by OS/390 Unix Services. +This is the EBCDIC analogue of latin1. You get similar results +by setting either LESSCHARSET=IBM-1047 or LC_CTYPE=en_US +in your environment. +.IP koi8-r +Selects a Russian character set. +.IP next +Selects a character set appropriate for NeXT computers. +.IP utf-8 +Selects the UTF-8 encoding of the ISO 10646 character set. +.IP windows +Selects a character set appropriate for Microsoft Windows (cp 1251). +.PP +In special cases, it may be desired to tailor +.I less +to use a character set other than the ones definable by LESSCHARSET. +In this case, the environment variable LESSCHARDEF can be used +to define a character set. +It should be set to a string where each character in the string represents +one character in the character set. +The character "." is used for a normal character, "c" for control, +and "b" for binary. +A decimal number may be used for repetition. +For example, "bccc4b." would mean character 0 is binary, +1, 2 and 3 are control, 4, 5, 6 and 7 are binary, and 8 is normal. +All characters after the last are taken to be the same as the last, +so characters 9 through 255 would be normal. +(This is an example, and does not necessarily +represent any real character set.) +.PP +This table shows the value of LESSCHARDEF which is equivalent +to each of the possible values for LESSCHARSET: +.sp + ascii\ 8bcccbcc18b95.b +.br + dos\ \ \ 8bcccbcc12bc5b95.b. +.br + ebcdic 5bc6bcc7bcc41b.9b7.9b5.b..8b6.10b6.b9.7b +.br + \ \ \ \ \ \ 9.8b8.17b3.3b9.7b9.8b8.6b10.b.b.b. +.br + IBM-1047 4cbcbc3b9cbccbccbb4c6bcc5b3cbbc4bc4bccbc +.br + \ \ \ \ \ \ 191.b +.br + iso8859 8bcccbcc18b95.33b. +.br + koi8-r 8bcccbcc18b95.b128. +.br + latin1 8bcccbcc18b95.33b. +.br + next\ \ 8bcccbcc18b95.bb125.bb +.PP +If neither LESSCHARSET nor LESSCHARDEF is set, +but any of the strings "UTF-8", "UTF8", "utf-8" or "utf8" +is found in the LC_ALL, LC_TYPE or LANG +environment variables, then the default character set is utf-8. +.PP +If that string is not found, but your system supports the +.I setlocale +interface, +.I less +will use setlocale to determine the character set. +setlocale is controlled by setting the LANG or LC_CTYPE environment +variables. +.PP +Finally, if the +.I setlocale +interface is also not available, the default character set is latin1. +.PP +Control and binary characters are displayed in standout (reverse video). +Each such character is displayed in caret notation if possible +(e.g. ^A for control-A). Caret notation is used only if +inverting the 0100 bit results in a normal printable character. +Otherwise, the character is displayed as a hex number in angle brackets. +This format can be changed by +setting the LESSBINFMT environment variable. +LESSBINFMT may begin with a "*" and one character to select +the display attribute: +"*k" is blinking, "*d" is bold, "*u" is underlined, "*s" is standout, +and "*n" is normal. +If LESSBINFMT does not begin with a "*", normal attribute is assumed. +The remainder of LESSBINFMT is a string which may include one +printf-style escape sequence (a % followed by x, X, o, d, etc.). +For example, if LESSBINFMT is "*u[%x]", binary characters +are displayed in underlined hexadecimal surrounded by brackets. +The default if no LESSBINFMT is specified is "*s\*[Lt]%X\*[Gt]". +The default if no LESSBINFMT is specified is "*s\*[Lt]%02X\*[Gt]". +Warning: the result of expanding the character via LESSBINFMT must +be less than 31 characters. +.PP +When the character set is utf-8, the LESSUTFBINFMT environment variable +acts similarly to LESSBINFMT but it applies to Unicode code points +that were successfully decoded but are unsuitable for display (e.g., +unassigned code points). +Its default value is "\*[Lt]U+%04lX\*[Gt]". +Note that LESSUTFBINFMT and LESSBINFMT share their display attribute +setting ("*x") so specifying one will affect both; +LESSUTFBINFMT is read after LESSBINFMT so its setting, if any, +will have priority. +Problematic octets in a UTF-8 file (octets of a truncated sequence, +octets of a complete but non-shortest form sequence, illegal octets, +and stray trailing octets) +are displayed individually using LESSBINFMT so as to facilitate diagnostic +of how the UTF-8 file is ill-formed. + +.SH "PROMPTS" +The \-P option allows you to tailor the prompt to your preference. +The string given to the \-P option replaces the specified prompt string. +Certain characters in the string are interpreted specially. +The prompt mechanism is rather complicated to provide flexibility, +but the ordinary user need not understand the details of constructing +personalized prompt strings. +.sp +A percent sign followed by a single character is expanded +according to what the following character is: +.IP "%b\fIX\fP" +Replaced by the byte offset into the current input file. +The b is followed by a single character (shown as \fIX\fP above) +which specifies the line whose byte offset is to be used. +If the character is a "t", the byte offset of the top line in the +display is used, +an "m" means use the middle line, +a "b" means use the bottom line, +a "B" means use the line just after the bottom line, +and a "j" means use the "target" line, as specified by the \-j option. +.IP "%B" +Replaced by the size of the current input file. +.IP "%c" +Replaced by the column number of the text appearing in the first +column of the screen. +.IP "%d\fIX\fP" +Replaced by the page number of a line in the input file. +The line to be used is determined by the \fIX\fP, as with the %b option. +.IP "%D" +Replaced by the number of pages in the input file, +or equivalently, the page number of the last line in the input file. +.IP "%E" +Replaced by the name of the editor (from the VISUAL environment variable, +or the EDITOR environment variable if VISUAL is not defined). +See the discussion of the LESSEDIT feature below. +.IP "%f" +Replaced by the name of the current input file. +.IP "%i" +Replaced by the index of the current file in the list of +input files. +.IP "%l\fIX\fP" +Replaced by the line number of a line in the input file. +The line to be used is determined by the \fIX\fP, as with the %b option. +.IP "%L" +Replaced by the line number of the last line in the input file. +.IP "%m" +Replaced by the total number of input files. +.IP "%p\fIX\fP" +Replaced by the percent into the current input file, based on byte offsets. +The line used is determined by the \fIX\fP as with the %b option. +.IP "%P\fIX\fP" +Replaced by the percent into the current input file, based on line numbers. +The line used is determined by the \fIX\fP as with the %b option. +.IP "%s" +Same as %B. +.IP "%t" +Causes any trailing spaces to be removed. +Usually used at the end of the string, but may appear anywhere. +.IP "%x" +Replaced by the name of the next input file in the list. +.PP +If any item is unknown (for example, the file size if input +is a pipe), a question mark is printed instead. +.PP +The format of the prompt string can be changed +depending on certain conditions. +A question mark followed by a single character acts like an "IF": +depending on the following character, a condition is evaluated. +If the condition is true, any characters following the question mark +and condition character, up to a period, are included in the prompt. +If the condition is false, such characters are not included. +A colon appearing between the question mark and the +period can be used to establish an "ELSE": any characters between +the colon and the period are included in the string if and only if +the IF condition is false. +Condition characters (which follow a question mark) may be: +.IP "?a" +True if any characters have been included in the prompt so far. +.IP "?b\fIX\fP" +True if the byte offset of the specified line is known. +.IP "?B" +True if the size of current input file is known. +.IP "?c" +True if the text is horizontally shifted (%c is not zero). +.IP "?d\fIX\fP" +True if the page number of the specified line is known. +.IP "?e" +True if at end-of-file. +.IP "?f" +True if there is an input filename +(that is, if input is not a pipe). +.IP "?l\fIX\fP" +True if the line number of the specified line is known. +.IP "?L" +True if the line number of the last line in the file is known. +.IP "?m" +True if there is more than one input file. +.IP "?n" +True if this is the first prompt in a new input file. +.IP "?p\fIX\fP" +True if the percent into the current input file, based on byte offsets, +of the specified line is known. +.IP "?P\fIX\fP" +True if the percent into the current input file, based on line numbers, +of the specified line is known. +.IP "?s" +Same as "?B". +.IP "?x" +True if there is a next input file +(that is, if the current input file is not the last one). +.PP +Any characters other than the special ones +(question mark, colon, period, percent, and backslash) +become literally part of the prompt. +Any of the special characters may be included in the prompt literally +by preceding it with a backslash. +.PP +Some examples: +.sp +?f%f:Standard input. +.sp +This prompt prints the filename, if known; +otherwise the string "Standard input". +.sp +?f%f .?ltLine %lt:?pt%pt\e%:?btByte %bt:-... +.sp +This prompt would print the filename, if known. +The filename is followed by the line number, if known, +otherwise the percent if known, otherwise the byte offset if known. +Otherwise, a dash is printed. +Notice how each question mark has a matching period, +and how the % after the %pt +is included literally by escaping it with a backslash. +.sp +?n?f%f\ .?m(file\ %i\ of\ %m)\ ..?e(END)\ ?x-\ Next\e:\ %x..%t +.sp +This prints the filename if this is the first prompt in a file, +followed by the "file N of N" message if there is more +than one input file. +Then, if we are at end-of-file, the string "(END)" is printed +followed by the name of the next file, if there is one. +Finally, any trailing spaces are truncated. +This is the default prompt. +For reference, here are the defaults for +the other two prompts (\-m and \-M respectively). +Each is broken into two lines here for readability only. +.nf +.sp +?n?f%f\ .?m(file\ %i\ of\ %m)\ ..?e(END)\ ?x-\ Next\e:\ %x.: + ?pB%pB\e%:byte\ %bB?s/%s...%t +.sp +?f%f\ .?n?m(file\ %i\ of\ %m)\ ..?ltlines\ %lt-%lb?L/%L.\ : + byte\ %bB?s/%s.\ .?e(END)\ ?x-\ Next\e:\ %x.:?pB%pB\e%..%t +.sp +.fi +And here is the default message produced by the = command: +.nf +.sp +?f%f\ .?m(file\ %i\ of\ %m)\ .?ltlines\ %lt-%lb?L/%L.\ . + byte\ %bB?s/%s.\ ?e(END)\ :?pB%pB\e%..%t +.fi +.PP +The prompt expansion features are also used for another purpose: +if an environment variable LESSEDIT is defined, it is used +as the command to be executed when the v command is invoked. +The LESSEDIT string is expanded in the same way as the prompt strings. +The default value for LESSEDIT is: +.nf +.sp + %E\ ?lm+%lm.\ %f +.sp +.fi +Note that this expands to the editor name, followed by a + and the +line number, followed by the file name. +If your editor does not accept the "+linenumber" syntax, or has other +differences in invocation syntax, the LESSEDIT variable can be +changed to modify this default. + +.SH SECURITY +When the environment variable LESSSECURE is set to 1, +.I less +runs in a "secure" mode. +This means these features are disabled: +.RS +.IP "!" +the shell command +.IP "|" +the pipe command +.IP ":e" +the examine command. +.IP "v" +the editing command +.IP "s \-o" +log files +.IP "\-k" +use of lesskey files +.IP "\-t" +use of tags files +.IP " " +metacharacters in filenames, such as * +.IP " " +filename completion (TAB, ^L) +.RE +.PP +Less can also be compiled to be permanently in "secure" mode. + +.SH "ENVIRONMENT VARIABLES" +Environment variables may be specified either in the system environment +as usual, or in a +.I lesskey +(1) file. +If environment variables are defined in more than one place, +variables defined in a local lesskey file take precedence over +variables defined in the system environment, which take precedence +over variables defined in the system-wide lesskey file. +.IP COLUMNS +Sets the number of columns on the screen. +Takes precedence over the number of columns specified by the TERM variable. +(But if you have a windowing system which supports TIOCGWINSZ or WIOCGETD, +the window system's idea of the screen size takes precedence over the +LINES and COLUMNS environment variables.) +.IP EDITOR +The name of the editor (used for the v command). +.IP HOME +Name of the user's home directory +(used to find a lesskey file on Unix and OS/2 systems). +.IP "HOMEDRIVE, HOMEPATH" +Concatenation of the HOMEDRIVE and HOMEPATH environment variables is +the name of the user's home directory if the HOME variable is not set +(only in the Windows version). +.IP INIT +Name of the user's init directory (used to find a lesskey file on OS/2 systems). +.IP LANG +Language for determining the character set. +.IP LC_CTYPE +Language for determining the character set. +.IP LESS +Options which are passed to +.I less +automatically. +.IP LESSANSIENDCHARS +Characters which may end an ANSI color escape sequence +(default "m"). +.IP LESSANSIMIDCHARS +Characters which may appear between the ESC character and the +end character in an ANSI color escape sequence +(default "0123456789;[?!"'#%()*+\ ". +.IP LESSBINFMT +Format for displaying non-printable, non-control characters. +.IP LESSCHARDEF +Defines a character set. +.IP LESSCHARSET +Selects a predefined character set. +.IP LESSCLOSE +Command line to invoke the (optional) input-postprocessor. +.IP LESSECHO +Name of the lessecho program (default "lessecho"). +The lessecho program is needed to expand metacharacters, such as * and ?, +in filenames on Unix systems. +.IP LESSEDIT +Editor prototype string (used for the v command). +See discussion under PROMPTS. +.IP LESSGLOBALTAGS +Name of the command used by the \-t option to find global tags. +Normally should be set to "global" if your system has the +.I global +(1) command. If not set, global tags are not used. +.IP LESSHISTFILE +Name of the history file used to remember search commands and +shell commands between invocations of +.I less. +If set to "\-", a history file is not used. +The default is "$HOME/.lesshst" on Unix systems, "$HOME/_lesshst" on +DOS and Windows systems, or "$HOME/lesshst.ini" or "$INIT/lesshst.ini" +on OS/2 systems. +.IP LESSHISTSIZE +The maximum number of commands to save in the history file. +The default is 100. +.IP LESSKEY +Name of the default lesskey(1) file. +.IP LESSKEY_SYSTEM +Name of the default system-wide lesskey(1) file. +.IP LESSMETACHARS +List of characters which are considered "metacharacters" by the shell. +.IP LESSMETAESCAPE +Prefix which less will add before each metacharacter in a +command sent to the shell. +If LESSMETAESCAPE is an empty string, commands containing +metacharacters will not be passed to the shell. +.IP LESSOPEN +Command line to invoke the (optional) input-preprocessor. +.IP LESSSECURE +Runs less in "secure" mode. +See discussion under SECURITY. +.IP LESSSEPARATOR +String to be appended to a directory name in filename completion. +.IP LESSUTFBINFMT +Format for displaying non-printable Unicode code points. +.IP LINES +Sets the number of lines on the screen. +Takes precedence over the number of lines specified by the TERM variable. +(But if you have a windowing system which supports TIOCGWINSZ or WIOCGETD, +the window system's idea of the screen size takes precedence over the +LINES and COLUMNS environment variables.) +.IP PATH +User's search path (used to find a lesskey file +on MS-DOS and OS/2 systems). +.IP SHELL +The shell used to execute the ! command, as well as to expand filenames. +.IP TERM +The type of terminal on which +.I less +is being run. +.IP VISUAL +The name of the editor (used for the v command). + +.SH "SEE ALSO" +lesskey(1) + +.SH WARNINGS +The = command and prompts (unless changed by \-P) +report the line numbers of the lines at the top and bottom of the screen, +but the byte and percent of the line after the one at the bottom of the screen. +.PP +If the :e command is used to name more than one file, +and one of the named files has been viewed previously, +the new files may be entered into the list in an unexpected order. +.PP +On certain older terminals (the so-called "magic cookie" terminals), +search highlighting will cause an erroneous display. +On such terminals, search highlighting is disabled by default +to avoid possible problems. +.PP +In certain cases, when search highlighting is enabled and +a search pattern begins with a ^, +more text than the matching string may be highlighted. +(This problem does not occur when less is compiled to use the POSIX +regular expression package.) +.PP +When viewing text containing ANSI color escape sequences using the \-R option, +searching will not find text containing an embedded escape sequence. +Also, search highlighting may change the color of some of the text +which follows the highlighted text. +.PP +On some systems, +.I setlocale +claims that ASCII characters 0 thru 31 are control characters +rather than binary characters. +This causes +.I less +to treat some binary files as ordinary, non-binary files. +To workaround this problem, set the environment variable +LESSCHARSET to "ascii" (or whatever character set is appropriate). +.PP +This manual is too long. +.PP +See http://www.greenwoodsoftware.com/less for the list of known bugs in all versions of less. + +.SH COPYRIGHT +Copyright (C) 1984-2005 Mark Nudelman +.PP +less is part of the GNU project and is free software. +You can redistribute it and/or modify it +under the terms of either +(1) the GNU General Public License as published by +the Free Software Foundation; or (2) the Less License. +See the file README in the less distribution for more details +regarding redistribution. +You should have received a copy of the GNU General Public License +along with the source for less; see the file COPYING. +If not, write to the Free Software Foundation, 59 Temple Place, +Suite 330, Boston, MA 02111-1307, USA. +You should also have received a copy of the Less License; +see the file LICENSE. +.PP +less 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. + +.SH AUTHOR +.PP +Mark Nudelman \*[Lt]markn@greenwoodsoftware.com\*[Gt] +.br +Send bug reports or comments to the above address or to bug-less@gnu.org. +.br +For more information, see the less homepage at http://www.greenwoodsoftware.com/less. diff --git a/commands/less/less/less.h b/commands/less/less/less.h new file mode 100644 index 000000000..415412752 --- /dev/null +++ b/commands/less/less/less.h @@ -0,0 +1,469 @@ +/* $NetBSD: less.h,v 1.9 2008/02/16 07:20:54 matt Exp $ */ + +/* + * Copyright (C) 1984-2005 Mark Nudelman + * + * You may distribute under the terms of either the GNU General Public + * License or the Less License, as specified in the README file. + * + * For more information about less, or for information on how to + * contact the author, see the README file. + */ + + +/* + * Standard include file for "less". + */ + +/* + * Defines for MSDOS_COMPILER. + */ +#define MSOFTC 1 /* Microsoft C */ +#define BORLANDC 2 /* Borland C */ +#define WIN32C 3 /* Windows (Borland C or Microsoft C) */ +#define DJGPPC 4 /* DJGPP C */ + +/* + * Include the file of compile-time options. + * The <> make cc search for it in -I., not srcdir. + */ +#include + +#ifdef _SEQUENT_ +/* + * Kludge for Sequent Dynix systems that have sigsetmask, but + * it's not compatible with the way less calls it. + * {{ Do other systems need this? }} + */ +#undef HAVE_SIGSETMASK +#endif + +/* + * Language details. + */ +#if HAVE_VOID +#define VOID_POINTER void * +#else +#define VOID_POINTER char * +#define void int +#endif +#if HAVE_CONST +#define constant const +#else +#define constant +#endif + +#define public /* PUBLIC FUNCTION */ + +/* Library function declarations */ + +#if HAVE_SYS_TYPES_H +#include +#endif +#if HAVE_STDIO_H +#include +#endif +#if HAVE_FCNTL_H +#include +#endif +#if HAVE_UNISTD_H +#include +#endif +#if HAVE_CTYPE_H +#include +#endif +#if HAVE_LIMITS_H +#include +#endif +#if HAVE_STDLIB_H +#include +#endif +#if HAVE_STRING_H +#include +#endif + +/* OS-specific includes */ +#ifdef _OSK +#include +#include +#endif + +#ifdef __TANDEM +#include +#endif + +#if MSDOS_COMPILER==WIN32C || OS2 +#include +#endif + +#if MSDOS_COMPILER==DJGPPC +#include +#include +#include +#include +#endif + +#if !HAVE_STDLIB_H +char *getenv(); +off_t lseek(); +VOID_POINTER calloc(); +void free(); +#endif + +/* + * Simple lowercase test which can be used during option processing + * (before options are parsed which might tell us what charset to use). + */ +#define ASCII_IS_UPPER(c) ((c) >= 'A' && (c) <= 'Z') +#define ASCII_IS_LOWER(c) ((c) >= 'a' && (c) <= 'z') +#define ASCII_TO_UPPER(c) ((c) - 'a' + 'A') +#define ASCII_TO_LOWER(c) ((c) - 'A' + 'a') + +#undef IS_UPPER +#undef IS_LOWER +#undef TO_UPPER +#undef TO_LOWER +#undef IS_SPACE +#undef IS_DIGIT + +#if !HAVE_UPPER_LOWER +#define IS_UPPER(c) ASCII_IS_UPPER(c) +#define IS_LOWER(c) ASCII_IS_LOWER(c) +#define TO_UPPER(c) ASCII_TO_UPPER(c) +#define TO_LOWER(c) ASCII_TO_LOWER(c) +#else +#define IS_UPPER(c) isupper((unsigned char) (c)) +#define IS_LOWER(c) islower((unsigned char) (c)) +#define TO_UPPER(c) toupper((unsigned char) (c)) +#define TO_LOWER(c) tolower((unsigned char) (c)) +#endif + +#ifdef isspace +#define IS_SPACE(c) isspace((unsigned char)(c)) +#else +#define IS_SPACE(c) ((c) == ' ' || (c) == '\t' || (c) == '\n' || (c) == '\r' || (c) == '\f') +#endif + +#ifdef isdigit +#define IS_DIGIT(c) isdigit((unsigned char)(c)) +#else +#define IS_DIGIT(c) ((c) >= '0' && (c) <= '9') +#endif + +#ifndef NULL +#define NULL 0 +#endif + +#ifndef TRUE +#define TRUE 1 +#endif +#ifndef FALSE +#define FALSE 0 +#endif + +#define OPT_OFF 0 +#define OPT_ON 1 +#define OPT_ONPLUS 2 + +#if !HAVE_MEMCPY +#ifndef memcpy +#define memcpy(to,from,len) bcopy((from),(to),(len)) +#endif +#endif + +#if HAVE_SNPRINTF +#define SNPRINTF1(str, size, fmt, v1) snprintf((str), (size), (fmt), (v1)) +#define SNPRINTF2(str, size, fmt, v1, v2) snprintf((str), (size), (fmt), (v1), (v2)) +#define SNPRINTF3(str, size, fmt, v1, v2, v3) snprintf((str), (size), (fmt), (v1), (v2), (v3)) +#define SNPRINTF4(str, size, fmt, v1, v2, v3, v4) snprintf((str), (size), (fmt), (v1), (v2), (v3), (v4)) +#else +/* Use unsafe sprintf if we don't have snprintf. */ +#define SNPRINTF1(str, size, fmt, v1) sprintf((str), (fmt), (v1)) +#define SNPRINTF2(str, size, fmt, v1, v2) sprintf((str), (fmt), (v1), (v2)) +#define SNPRINTF3(str, size, fmt, v1, v2, v3) sprintf((str), (fmt), (v1), (v2), (v3)) +#define SNPRINTF4(str, size, fmt, v1, v2, v3, v4) sprintf((str), (fmt), (v1), (v2), (v3), (v4)) +#endif + +#define BAD_LSEEK ((off_t)-1) + +#ifndef CHAR_BIT +#define CHAR_BIT 8 +#endif + +/* + * Upper bound on the string length of an integer converted to string. + * 302 / 1000 is ceil (log10 (2.0)). Subtract 1 for the sign bit; + * add 1 for integer division truncation; add 1 more for a minus sign. + */ +#define INT_STRLEN_BOUND(t) ((sizeof(t) * CHAR_BIT - 1) * 302 / 1000 + 1 + 1) + +/* + * Special types and constants. + */ +typedef unsigned long LWCHAR; +typedef off_t POSITION; +typedef off_t LINENUM; +#define MIN_LINENUM_WIDTH 7 /* Min printing width of a line number */ +#define MAX_UTF_CHAR_LEN 6 /* Max bytes in one UTF-8 char */ + +#define NULL_POSITION ((POSITION)(-1)) + +/* + * Flags for open() + */ +#if MSDOS_COMPILER || OS2 +#define OPEN_READ (O_RDONLY|O_BINARY) +#else +#ifdef _OSK +#define OPEN_READ (S_IREAD) +#else +#ifdef O_RDONLY +#define OPEN_READ (O_RDONLY) +#else +#define OPEN_READ (0) +#endif +#endif +#endif + +#if defined(O_WRONLY) && defined(O_APPEND) +#define OPEN_APPEND (O_APPEND|O_WRONLY) +#else +#ifdef _OSK +#define OPEN_APPEND (S_IWRITE) +#else +#define OPEN_APPEND (1) +#endif +#endif + +/* + * Set a file descriptor to binary mode. + */ +#if MSDOS_COMPILER==MSOFTC +#define SET_BINARY(f) _setmode(f, _O_BINARY); +#else +#if MSDOS_COMPILER || OS2 +#define SET_BINARY(f) setmode(f, O_BINARY) +#else +#define SET_BINARY(f) +#endif +#endif + +/* + * Does the shell treat "?" as a metacharacter? + */ +#if MSDOS_COMPILER || OS2 || _OSK +#define SHELL_META_QUEST 0 +#else +#define SHELL_META_QUEST 1 +#endif + +#define SPACES_IN_FILENAMES 1 + +/* + * An IFILE represents an input file. + */ +#define IFILE VOID_POINTER +#define NULL_IFILE ((IFILE)NULL) + +/* + * The structure used to represent a "screen position". + * This consists of a file position, and a screen line number. + * The meaning is that the line starting at the given file + * position is displayed on the ln-th line of the screen. + * (Screen lines before ln are empty.) + */ +struct scrpos +{ + POSITION pos; + int ln; +}; + +typedef union parg +{ + constant char *p_string; + int p_int; + LINENUM p_linenum; +} PARG; + +#define NULL_PARG ((PARG *)NULL) + +struct textlist +{ + char *string; + char *endstring; +}; + +#define EOI (-1) + +#define READ_INTR (-2) + +/* How quiet should we be? */ +#define NOT_QUIET 0 /* Ring bell at eof and for errors */ +#define LITTLE_QUIET 1 /* Ring bell only for errors */ +#define VERY_QUIET 2 /* Never ring bell */ + +/* How should we prompt? */ +#define PR_SHORT 0 /* Prompt with colon */ +#define PR_MEDIUM 1 /* Prompt with message */ +#define PR_LONG 2 /* Prompt with longer message */ + +/* How should we handle backspaces? */ +#define BS_SPECIAL 0 /* Do special things for underlining and bold */ +#define BS_NORMAL 1 /* \b treated as normal char; actually output */ +#define BS_CONTROL 2 /* \b treated as control char; prints as ^H */ + +/* How should we search? */ +#define SRCH_FORW (1 << 0) /* Search forward from current position */ +#define SRCH_BACK (1 << 1) /* Search backward from current position */ +#define SRCH_NO_MOVE (1 << 2) /* Highlight, but don't move */ +#define SRCH_FIND_ALL (1 << 4) /* Find and highlight all matches */ +#define SRCH_NO_MATCH (1 << 8) /* Search for non-matching lines */ +#define SRCH_PAST_EOF (1 << 9) /* Search past end-of-file, into next file */ +#define SRCH_FIRST_FILE (1 << 10) /* Search starting at the first file */ +#define SRCH_NO_REGEX (1 << 12) /* Don't use regular expressions */ + +#define SRCH_REVERSE(t) (((t) & SRCH_FORW) ? \ + (((t) & ~SRCH_FORW) | SRCH_BACK) : \ + (((t) & ~SRCH_BACK) | SRCH_FORW)) + +/* */ +#define NO_MCA 0 +#define MCA_DONE 1 +#define MCA_MORE 2 + +#define CC_OK 0 /* Char was accepted & processed */ +#define CC_QUIT 1 /* Char was a request to abort current cmd */ +#define CC_ERROR 2 /* Char could not be accepted due to error */ +#define CC_PASS 3 /* Char was rejected (internal) */ + +#define CF_QUIT_ON_ERASE 0001 /* Abort cmd if its entirely erased */ + +/* Special char bit-flags used to tell put_line() to do something special */ +#define AT_NORMAL (0) +#define AT_UNDERLINE (1 << 0) +#define AT_BOLD (1 << 1) +#define AT_BLINK (1 << 2) +#define AT_STANDOUT (1 << 3) +#define AT_ANSI (1 << 4) /* Content-supplied "ANSI" escape sequence */ +#define AT_BINARY (1 << 5) /* LESS*BINFMT representation */ +#define AT_HILITE (1 << 6) /* Internal highlights (e.g., for search) */ + +#if '0' == 240 +#define IS_EBCDIC_HOST 1 +#endif + +#if IS_EBCDIC_HOST +/* + * Long definition for EBCDIC. + * Since the argument is usually a constant, this macro normally compiles + * into a constant. + */ +#define CONTROL(c) ( \ + (c)=='[' ? '\047' : \ + (c)=='a' ? '\001' : \ + (c)=='b' ? '\002' : \ + (c)=='c' ? '\003' : \ + (c)=='d' ? '\067' : \ + (c)=='e' ? '\055' : \ + (c)=='f' ? '\056' : \ + (c)=='g' ? '\057' : \ + (c)=='h' ? '\026' : \ + (c)=='i' ? '\005' : \ + (c)=='j' ? '\025' : \ + (c)=='k' ? '\013' : \ + (c)=='l' ? '\014' : \ + (c)=='m' ? '\015' : \ + (c)=='n' ? '\016' : \ + (c)=='o' ? '\017' : \ + (c)=='p' ? '\020' : \ + (c)=='q' ? '\021' : \ + (c)=='r' ? '\022' : \ + (c)=='s' ? '\023' : \ + (c)=='t' ? '\074' : \ + (c)=='u' ? '\075' : \ + (c)=='v' ? '\062' : \ + (c)=='w' ? '\046' : \ + (c)=='x' ? '\030' : \ + (c)=='y' ? '\031' : \ + (c)=='z' ? '\077' : \ + (c)=='A' ? '\001' : \ + (c)=='B' ? '\002' : \ + (c)=='C' ? '\003' : \ + (c)=='D' ? '\067' : \ + (c)=='E' ? '\055' : \ + (c)=='F' ? '\056' : \ + (c)=='G' ? '\057' : \ + (c)=='H' ? '\026' : \ + (c)=='I' ? '\005' : \ + (c)=='J' ? '\025' : \ + (c)=='K' ? '\013' : \ + (c)=='L' ? '\014' : \ + (c)=='M' ? '\015' : \ + (c)=='N' ? '\016' : \ + (c)=='O' ? '\017' : \ + (c)=='P' ? '\020' : \ + (c)=='Q' ? '\021' : \ + (c)=='R' ? '\022' : \ + (c)=='S' ? '\023' : \ + (c)=='T' ? '\074' : \ + (c)=='U' ? '\075' : \ + (c)=='V' ? '\062' : \ + (c)=='W' ? '\046' : \ + (c)=='X' ? '\030' : \ + (c)=='Y' ? '\031' : \ + (c)=='Z' ? '\077' : \ + (c)=='|' ? '\031' : \ + (c)=='\\' ? '\034' : \ + (c)=='^' ? '\036' : \ + (c)&077) +#else +#define CONTROL(c) ((c)&037) +#endif /* IS_EBCDIC_HOST */ + +#define ESC CONTROL('[') + +#if _OSK_MWC32 +#define LSIGNAL(sig,func) os9_signal(sig,func) +#else +#define LSIGNAL(sig,func) signal(sig,func) +#endif + +#if HAVE_SIGPROCMASK +#if HAVE_SIGSET_T +#else +#undef HAVE_SIGPROCMASK +#endif +#endif +#if HAVE_SIGPROCMASK +#if HAVE_SIGEMPTYSET +#else +#undef sigemptyset +#define sigemptyset(mp) *(mp) = 0 +#endif +#endif + +#define S_INTERRUPT 01 +#define S_STOP 02 +#define S_WINCH 04 +#define ABORT_SIGS() (sigs & (S_INTERRUPT|S_STOP)) + +#define QUIT_OK 0 +#define QUIT_ERROR 1 +#define QUIT_SAVED_STATUS (-1) + +/* filestate flags */ +#define CH_CANSEEK 001 +#define CH_KEEPOPEN 002 +#define CH_POPENED 004 +#define CH_HELPFILE 010 + +#define ch_zero() ((POSITION)0) + +#define FAKE_HELPFILE "@/\\less/\\help/\\file/\\@" + +#include "funcs.h" + +/* Functions not included in funcs.h */ +void postoa(); +void linenumtoa(); +void inttoa(); diff --git a/commands/less/less/lesskey.h b/commands/less/less/lesskey.h new file mode 100644 index 000000000..1734d2663 --- /dev/null +++ b/commands/less/less/lesskey.h @@ -0,0 +1,40 @@ +/* + * Copyright (C) 1984-2004 Mark Nudelman + * + * You may distribute under the terms of either the GNU General Public + * License or the Less License, as specified in the README file. + * + * For more information about less, or for information on how to + * contact the author, see the README file. + */ + + +/* + * Format of a lesskey file: + * + * LESSKEY_MAGIC (4 bytes) + * sections... + * END_LESSKEY_MAGIC (4 bytes) + * + * Each section is: + * + * section_MAGIC (1 byte) + * section_length (2 bytes) + * key table (section_length bytes) + */ +#define C0_LESSKEY_MAGIC '\0' +#define C1_LESSKEY_MAGIC 'M' +#define C2_LESSKEY_MAGIC '+' +#define C3_LESSKEY_MAGIC 'G' + +#define CMD_SECTION 'c' +#define EDIT_SECTION 'e' +#define VAR_SECTION 'v' +#define END_SECTION 'x' + +#define C0_END_LESSKEY_MAGIC 'E' +#define C1_END_LESSKEY_MAGIC 'n' +#define C2_END_LESSKEY_MAGIC 'd' + +/* */ +#define KRADIX 64 diff --git a/commands/less/less/lglob.h b/commands/less/less/lglob.h new file mode 100644 index 000000000..1c232fb08 --- /dev/null +++ b/commands/less/less/lglob.h @@ -0,0 +1,95 @@ +/* + * Copyright (C) 1984-2004 Mark Nudelman + * + * You may distribute under the terms of either the GNU General Public + * License or the Less License, as specified in the README file. + * + * For more information about less, or for information on how to + * contact the author, see the README file. + */ + + +/* + * Macros to define the method of doing filename "globbing". + * There are three possible mechanisms: + * 1. GLOB_LIST + * This defines a function that returns a list of matching filenames. + * 2. GLOB_NAME + * This defines a function that steps thru the list of matching + * filenames, returning one name each time it is called. + * 3. GLOB_STRING + * This defines a function that returns the complete list of + * matching filenames as a single space-separated string. + */ + +#if OS2 + +#define DECL_GLOB_LIST(list) char **list; char **pp; +#define GLOB_LIST(filename,list) list = _fnexplode(filename) +#define GLOB_LIST_FAILED(list) list == NULL +#define SCAN_GLOB_LIST(list,p) pp = list; *pp != NULL; pp++ +#define INIT_GLOB_LIST(list,p) p = *pp +#define GLOB_LIST_DONE(list) _fnexplodefree(list) + +#else +#if MSDOS_COMPILER==DJGPPC + +#define DECL_GLOB_LIST(list) glob_t list; size_t i; +#define GLOB_LIST(filename,list) glob(filename,GLOB_NOCHECK,0,&list) +#define GLOB_LIST_FAILED(list) 0 +#define SCAN_GLOB_LIST(list,p) i = 0; i < list.gl_pathc; i++ +#define INIT_GLOB_LIST(list,p) p = list.gl_pathv[i] +#define GLOB_LIST_DONE(list) globfree(&list) + +#else +#if MSDOS_COMPILER==MSOFTC || MSDOS_COMPILER==BORLANDC + +#define GLOB_FIRST_NAME(filename,fndp,h) h = _dos_findfirst(filename, ~_A_VOLID, fndp) +#define GLOB_FIRST_FAILED(handle) ((handle) != 0) +#define GLOB_NEXT_NAME(handle,fndp) _dos_findnext(fndp) +#define GLOB_NAME_DONE(handle) +#define GLOB_NAME name +#define DECL_GLOB_NAME(fnd,drive,dir,fname,ext,handle) \ + struct find_t fnd; \ + char drive[_MAX_DRIVE]; \ + char dir[_MAX_DIR]; \ + char fname[_MAX_FNAME]; \ + char ext[_MAX_EXT]; \ + int handle; +#else +#if MSDOS_COMPILER==WIN32C && defined(_MSC_VER) + +#define GLOB_FIRST_NAME(filename,fndp,h) h = _findfirst(filename, fndp) +#define GLOB_FIRST_FAILED(handle) ((handle) == -1) +#define GLOB_NEXT_NAME(handle,fndp) _findnext(handle, fndp) +#define GLOB_NAME_DONE(handle) _findclose(handle) +#define GLOB_NAME name +#define DECL_GLOB_NAME(fnd,drive,dir,fname,ext,handle) \ + struct _finddata_t fnd; \ + char drive[_MAX_DRIVE]; \ + char dir[_MAX_DIR]; \ + char fname[_MAX_FNAME]; \ + char ext[_MAX_EXT]; \ + long handle; + +#else +#if MSDOS_COMPILER==WIN32C && !defined(_MSC_VER) /* Borland C for Windows */ + +#define GLOB_FIRST_NAME(filename,fndp,h) h = findfirst(filename, fndp, ~FA_LABEL) +#define GLOB_FIRST_FAILED(handle) ((handle) != 0) +#define GLOB_NEXT_NAME(handle,fndp) findnext(fndp) +#define GLOB_NAME_DONE(handle) +#define GLOB_NAME ff_name +#define DECL_GLOB_NAME(fnd,drive,dir,fname,ext,handle) \ + struct ffblk fnd; \ + char drive[MAXDRIVE]; \ + char dir[MAXDIR]; \ + char fname[MAXFILE]; \ + char ext[MAXEXT]; \ + int handle; + +#endif +#endif +#endif +#endif +#endif diff --git a/commands/less/less/line.c b/commands/less/less/line.c new file mode 100644 index 000000000..cf7b98964 --- /dev/null +++ b/commands/less/less/line.c @@ -0,0 +1,1207 @@ +/* $NetBSD: line.c,v 1.11 2006/10/26 01:33:08 mrg Exp $ */ + +/* + * Copyright (C) 1984-2005 Mark Nudelman + * + * You may distribute under the terms of either the GNU General Public + * License or the Less License, as specified in the README file. + * + * For more information about less, or for information on how to + * contact the author, see the README file. + */ + + +/* + * Routines to manipulate the "line buffer". + * The line buffer holds a line of output as it is being built + * in preparation for output to the screen. + */ + +#include "less.h" +#include "charset.h" + +static char *linebuf = NULL; /* Buffer which holds the current output line */ +static char *attr = NULL; /* Extension of linebuf to hold attributes */ +public int size_linebuf = 0; /* Size of line buffer (and attr buffer) */ + +static int cshift; /* Current left-shift of output line buffer */ +public int hshift; /* Desired left-shift of output line buffer */ +public int tabstops[TABSTOP_MAX] = { 0 }; /* Custom tabstops */ +public int ntabstops = 1; /* Number of tabstops */ +public int tabdefault = 8; /* Default repeated tabstops */ + +static int curr; /* Index into linebuf */ +static int column; /* Printable length, accounting for + backspaces, etc. */ +static int overstrike; /* Next char should overstrike previous char */ +static int last_overstrike = AT_NORMAL; +static int is_null_line; /* There is no current line */ +static int lmargin; /* Left margin */ +static int line_matches; /* Number of search matches in this line */ +static char pendc; +static POSITION pendpos; +static char *end_ansi_chars; +static char *mid_ansi_chars; + +static int attr_swidth(int); +static int attr_ewidth(int); +static int do_append(LWCHAR, char *, POSITION); +extern int sigs; +extern int bs_mode; +extern int linenums; +extern int ctldisp; +extern int twiddle; +extern int binattr; +extern int status_col; +extern int auto_wrap, ignaw; +extern int bo_s_width, bo_e_width; +extern int ul_s_width, ul_e_width; +extern int bl_s_width, bl_e_width; +extern int so_s_width, so_e_width; +extern int sc_width, sc_height; +extern int utf_mode; +extern POSITION start_attnpos; +extern POSITION end_attnpos; + +static char mbc_buf[MAX_UTF_CHAR_LEN]; +static int mbc_buf_len = 0; +static int mbc_buf_index = 0; +static POSITION mbc_pos; + +/* + * Initialize from environment variables. + */ + public void +init_line() +{ + end_ansi_chars = lgetenv("LESSANSIENDCHARS"); + if (end_ansi_chars == NULL || *end_ansi_chars == '\0') + end_ansi_chars = "m"; + + mid_ansi_chars = lgetenv("LESSANSIMIDCHARS"); + if (mid_ansi_chars == NULL || *mid_ansi_chars == '\0') + mid_ansi_chars = "0123456789;[?!\"'#%()*+ "; + + linebuf = (char *) ecalloc(LINEBUF_SIZE, sizeof(char)); + attr = (char *) ecalloc(LINEBUF_SIZE, sizeof(char)); + size_linebuf = LINEBUF_SIZE; +} + +/* + * Expand the line buffer. + */ + static int +expand_linebuf() +{ + /* Double the size of the line buffer. */ + int new_size = size_linebuf * 2; + + /* Just realloc to expand the buffer, if we can. */ +#if HAVE_REALLOC + char *new_buf = (char *) realloc(linebuf, new_size); + char *new_attr = (char *) realloc(attr, new_size); +#else + char *new_buf = (char *) calloc(new_size, sizeof(char)); + char *new_attr = (char *) calloc(new_size, sizeof(char)); +#endif + if (new_buf == NULL || new_attr == NULL) + { + if (new_attr != NULL) + free(new_attr); + if (new_buf != NULL) + free(new_buf); + return 1; + } +#if HAVE_REALLOC + /* + * We realloc'd the buffers; they already have the old contents. + */ + #if 0 + memset(new_buf + size_linebuf, 0, new_size - size_linebuf); + memset(new_attr + size_linebuf, 0, new_size - size_linebuf); + #endif +#else + /* + * We just calloc'd the buffers; copy the old contents. + */ + memcpy(new_buf, linebuf, size_linebuf * sizeof(char)); + memcpy(new_attr, attr, size_linebuf * sizeof(char)); + free(attr); + free(linebuf); +#endif + linebuf = new_buf; + attr = new_attr; + size_linebuf = new_size; + return 0; +} + +/* + * Is a character ASCII? + */ + public int +is_ascii_char(ch) + LWCHAR ch; +{ + return (ch <= 0x7F); +} + +/* + * Rewind the line buffer. + */ + public void +prewind() +{ + curr = 0; + column = 0; + cshift = 0; + overstrike = 0; + last_overstrike = AT_NORMAL; + mbc_buf_len = 0; + is_null_line = 0; + pendc = '\0'; + lmargin = 0; + if (status_col) + lmargin += 1; +#if HILITE_SEARCH + line_matches = 0; +#endif +} + +/* + * Insert the line number (of the given position) into the line buffer. + */ + public void +plinenum(pos) + POSITION pos; +{ + register LINENUM linenum = 0; + register int i; + + if (linenums == OPT_ONPLUS) + { + /* + * Get the line number and put it in the current line. + * {{ Note: since find_linenum calls forw_raw_line, + * it may seek in the input file, requiring the caller + * of plinenum to re-seek if necessary. }} + * {{ Since forw_raw_line modifies linebuf, we must + * do this first, before storing anything in linebuf. }} + */ + linenum = find_linenum(pos); + } + + /* + * Display a status column if the -J option is set. + */ + if (status_col) + { + linebuf[curr] = ' '; + if (start_attnpos != NULL_POSITION && + pos >= start_attnpos && pos < end_attnpos) + attr[curr] = AT_NORMAL|AT_HILITE; + else + attr[curr] = AT_NORMAL; + curr++; + column++; + } + /* + * Display the line number at the start of each line + * if the -N option is set. + */ + if (linenums == OPT_ONPLUS) + { + char buf[INT_STRLEN_BOUND(pos) + 2]; + int n; + + linenumtoa(linenum, buf); + n = strlen(buf); + if (n < MIN_LINENUM_WIDTH) + n = MIN_LINENUM_WIDTH; + sprintf(linebuf+curr, "%*s ", n, buf); + n++; /* One space after the line number. */ + for (i = 0; i < n; i++) + attr[curr+i] = AT_NORMAL; + curr += n; + column += n; + lmargin += n; + } + + /* + * Append enough spaces to bring us to the lmargin. + */ + while (column < lmargin) + { + linebuf[curr] = ' '; + attr[curr++] = AT_NORMAL; + column++; + } +} + +/* + * Shift the input line left. + * This means discarding N printable chars at the start of the buffer. + */ + static void +pshift(shift) + int shift; +{ + LWCHAR prev_ch = 0; + unsigned char c; + int shifted = 0; + int to; + int from; + int len; + int width; + int prev_attr; + int next_attr; + + if (shift > column - lmargin) + shift = column - lmargin; + if (shift > curr - lmargin) + shift = curr - lmargin; + + to = from = lmargin; + /* + * We keep on going when shifted == shift + * to get all combining chars. + */ + while (shifted <= shift && from < curr) + { + c = linebuf[from]; + if (c == ESC && ctldisp == OPT_ONPLUS) + { + /* Keep cumulative effect. */ + linebuf[to] = c; + attr[to++] = attr[from++]; + while (from < curr && linebuf[from]) + { + linebuf[to] = linebuf[from]; + attr[to++] = attr[from]; + if (!is_ansi_middle(linebuf[from++])) + break; + } + continue; + } + + width = 0; + + if (!IS_ASCII_OCTET(c) && utf_mode) + { + /* Assumes well-formedness validation already done. */ + LWCHAR ch; + + len = utf_len(c); + if (from + len > curr) + break; + ch = get_wchar(linebuf + from); + if (!is_composing_char(ch) && !is_combining_char(prev_ch, ch)) + width = is_wide_char(ch) ? 2 : 1; + prev_ch = ch; + } else + { + len = 1; + if (c == '\b') + /* XXX - Incorrect if several '\b' in a row. */ + width = (utf_mode && is_wide_char(prev_ch)) ? -2 : -1; + else if (!control_char(c)) + width = 1; + prev_ch = 0; + } + + if (width == 2 && shift - shifted == 1) { + /* Should never happen when called by pshift_all(). */ + attr[to] = attr[from]; + /* + * Assume a wide_char will never be the first half of a + * combining_char pair, so reset prev_ch in case we're + * followed by a '\b'. + */ + prev_ch = linebuf[to++] = ' '; + from += len; + shifted++; + continue; + } + + /* Adjust width for magic cookies. */ + prev_attr = (to > 0) ? attr[to-1] : AT_NORMAL; + next_attr = (from + len < curr) ? attr[from + len] : prev_attr; + if (!is_at_equiv(attr[from], prev_attr) && + !is_at_equiv(attr[from], next_attr)) + { + width += attr_swidth(attr[from]); + if (from + len < curr) + width += attr_ewidth(attr[from]); + if (is_at_equiv(prev_attr, next_attr)) + { + width += attr_ewidth(prev_attr); + if (from + len < curr) + width += attr_swidth(next_attr); + } + } + + if (shift - shifted < width) + break; + from += len; + shifted += width; + if (shifted < 0) + shifted = 0; + } + while (from < curr) + { + linebuf[to] = linebuf[from]; + attr[to++] = attr[from++]; + } + curr = to; + column -= shifted; + cshift += shifted; +} + +/* + * + */ + public void +pshift_all() +{ + pshift(column); +} + +/* + * Return the printing width of the start (enter) sequence + * for a given character attribute. + */ + static int +attr_swidth(a) + int a; +{ + int w = 0; + + a = apply_at_specials(a); + + if (a & AT_UNDERLINE) + w += ul_s_width; + if (a & AT_BOLD) + w += bo_s_width; + if (a & AT_BLINK) + w += bl_s_width; + if (a & AT_STANDOUT) + w += so_s_width; + + return w; +} + +/* + * Return the printing width of the end (exit) sequence + * for a given character attribute. + */ + static int +attr_ewidth(a) + int a; +{ + int w = 0; + + a = apply_at_specials(a); + + if (a & AT_UNDERLINE) + w += ul_e_width; + if (a & AT_BOLD) + w += bo_e_width; + if (a & AT_BLINK) + w += bl_e_width; + if (a & AT_STANDOUT) + w += so_e_width; + + return w; +} + +/* + * Return the printing width of a given character and attribute, + * if the character were added to the current position in the line buffer. + * Adding a character with a given attribute may cause an enter or exit + * attribute sequence to be inserted, so this must be taken into account. + */ + static int +pwidth(ch, a, prev_ch) + LWCHAR ch; + int a; + LWCHAR prev_ch; +{ + int w; + + if (ch == '\b') + /* + * Backspace moves backwards one or two positions. + * XXX - Incorrect if several '\b' in a row. + */ + return (utf_mode && is_wide_char(prev_ch)) ? -2 : -1; + + if (!utf_mode || is_ascii_char(ch)) + { + if (control_char((char)ch)) + { + /* + * Control characters do unpredictable things, + * so we don't even try to guess; say it doesn't move. + * This can only happen if the -r flag is in effect. + */ + return (0); + } + } else + { + if (is_composing_char(ch) || is_combining_char(prev_ch, ch)) + { + /* + * Composing and combining chars take up no space. + * + * Some terminals, upon failure to compose a + * composing character with the character(s) that + * precede(s) it will actually take up one column + * for the composing character; there isn't much + * we could do short of testing the (complex) + * composition process ourselves and printing + * a binary representation when it fails. + */ + return (0); + } + } + + /* + * Other characters take one or two columns, + * plus the width of any attribute enter/exit sequence. + */ + w = 1; + if (is_wide_char(ch)) + w++; + if (curr > 0 && !is_at_equiv(attr[curr-1], a)) + w += attr_ewidth(attr[curr-1]); + if ((apply_at_specials(a) != AT_NORMAL) && + (curr == 0 || !is_at_equiv(attr[curr-1], a))) + w += attr_swidth(a); + return (w); +} + +/* + * Delete to the previous base character in the line buffer. + * Return 1 if one is found. + */ + static int +backc() +{ + LWCHAR prev_ch; + char *p = linebuf + curr; + LWCHAR ch = step_char(&p, -1, linebuf + lmargin); + int width; + + /* This assumes that there is no '\b' in linebuf. */ + while ( curr > lmargin + && column > lmargin + && (!(attr[curr - 1] & (AT_ANSI|AT_BINARY)))) + { + curr = p - linebuf; + prev_ch = step_char(&p, -1, linebuf + lmargin); + width = pwidth(ch, attr[curr], prev_ch); + column -= width; + if (width > 0) + return 1; + ch = prev_ch; + } + + return 0; +} + +/* + * Are we currently within a recognized ANSI escape sequence? + */ + static int +in_ansi_esc_seq() +{ + char *p; + + /* + * Search backwards for either an ESC (which means we ARE in a seq); + * or an end char (which means we're NOT in a seq). + */ + for (p = &linebuf[curr]; p > linebuf; ) + { + LWCHAR ch = step_char(&p, -1, linebuf); + if (ch == ESC) + return (1); + if (!is_ansi_middle(ch)) + return (0); + } + return (0); +} + +/* + * Is a character the end of an ANSI escape sequence? + */ + public int +is_ansi_end(ch) + LWCHAR ch; +{ + if (!is_ascii_char(ch)) + return (0); + return (strchr(end_ansi_chars, (char) ch) != NULL); +} + +/* + * + */ + public int +is_ansi_middle(ch) + LWCHAR ch; +{ + if (!is_ascii_char(ch)) + return (0); + if (is_ansi_end(ch)) + return (0); + return (strchr(mid_ansi_chars, (char) ch) != NULL); +} + +/* + * Append a character and attribute to the line buffer. + */ +#define STORE_CHAR(ch,a,rep,pos) \ + do { \ + if (store_char((ch),(a),(rep),(pos))) return (1); \ + } while (0) + + static int +store_char(ch, a, rep, pos) + LWCHAR ch; + int a; + char *rep; + POSITION pos; +{ + int w; + int replen; + char cs; + + w = (a & (AT_UNDERLINE|AT_BOLD)); /* Pre-use w. */ + if (w != AT_NORMAL) + last_overstrike = w; + +#if HILITE_SEARCH + { + int matches; + if (is_hilited(pos, pos+1, 0, &matches)) + { + /* + * This character should be highlighted. + * Override the attribute passed in. + */ + if (a != AT_ANSI) + a |= AT_HILITE; + } + line_matches += matches; + } +#endif + + if (ctldisp == OPT_ONPLUS && in_ansi_esc_seq()) + { + if (!is_ansi_end(ch) && !is_ansi_middle(ch)) { + /* Remove whole unrecognized sequence. */ + do { + --curr; + } while (linebuf[curr] != ESC); + return 0; + } + a = AT_ANSI; /* Will force re-AT_'ing around it. */ + w = 0; + } + else if (ctldisp == OPT_ONPLUS && ch == ESC) + { + a = AT_ANSI; /* Will force re-AT_'ing around it. */ + w = 0; + } + else + { + char *p = &linebuf[curr]; + LWCHAR prev_ch = step_char(&p, -1, linebuf); + w = pwidth(ch, a, prev_ch); + } + + if (ctldisp != OPT_ON && column + w + attr_ewidth(a) > sc_width) + /* + * Won't fit on screen. + */ + return (1); + + if (rep == NULL) + { + cs = (char) ch; + rep = &cs; + replen = 1; + } else + { + replen = utf_len(rep[0]); + } + if (curr + replen >= size_linebuf-6) + { + /* + * Won't fit in line buffer. + * Try to expand it. + */ + if (expand_linebuf()) + return (1); + } + + while (replen-- > 0) + { + linebuf[curr] = *rep++; + attr[curr] = a; + curr++; + } + column += w; + return (0); +} + +/* + * Append a tab to the line buffer. + * Store spaces to represent the tab. + */ +#define STORE_TAB(a,pos) \ + do { if (store_tab((a),(pos))) return (1); } while (0) + + static int +store_tab(attr, pos) + int attr; + POSITION pos; +{ + int to_tab = column + cshift - lmargin; + int i; + + if (ntabstops < 2 || to_tab >= tabstops[ntabstops-1]) + to_tab = tabdefault - + ((to_tab - tabstops[ntabstops-1]) % tabdefault); + else + { + for (i = ntabstops - 2; i >= 0; i--) + if (to_tab >= tabstops[i]) + break; + to_tab = tabstops[i+1] - to_tab; + } + + if (column + to_tab - 1 + pwidth(' ', attr, 0) + attr_ewidth(attr) > sc_width) + return 1; + + do { + STORE_CHAR(' ', attr, " ", pos); + } while (--to_tab > 0); + return 0; +} + +#define STORE_PRCHAR(c, pos) \ + do { if (store_prchar((c), (pos))) return 1; } while (0) + + static int +store_prchar(c, pos) + char c; + POSITION pos; +{ + char *s; + + /* + * Convert to printable representation. + */ + s = prchar(c); + + /* + * Make sure we can get the entire representation + * of the character on this line. + */ + if (column + (int) strlen(s) - 1 + + pwidth(' ', binattr, 0) + attr_ewidth(binattr) > sc_width) + return 1; + + for ( ; *s != 0; s++) + STORE_CHAR(*s, AT_BINARY, NULL, pos); + + return 0; +} + + static int +flush_mbc_buf(pos) + POSITION pos; +{ + int i; + + for (i = 0; i < mbc_buf_index; i++) + if (store_prchar(mbc_buf[i], pos)) + return mbc_buf_index - i; + + return 0; +} + +/* + * Append a character to the line buffer. + * Expand tabs into spaces, handle underlining, boldfacing, etc. + * Returns 0 if ok, 1 if couldn't fit in buffer. + */ + public int +pappend(c, pos) + char c; + POSITION pos; +{ + int r; + + if (pendc) + { + if (do_append(pendc, NULL, pendpos)) + /* + * Oops. We've probably lost the char which + * was in pendc, since caller won't back up. + */ + return (1); + pendc = '\0'; + } + + if (c == '\r' && bs_mode == BS_SPECIAL) + { + if (mbc_buf_len > 0) /* utf_mode must be on. */ + { + /* Flush incomplete (truncated) sequence. */ + r = flush_mbc_buf(mbc_pos); + mbc_buf_index = r + 1; + mbc_buf_len = 0; + if (r) + return (mbc_buf_index); + } + + /* + * Don't put the CR into the buffer until we see + * the next char. If the next char is a newline, + * discard the CR. + */ + pendc = c; + pendpos = pos; + return (0); + } + + if (!utf_mode) + { + r = do_append((LWCHAR) c, NULL, pos); + } else + { + /* Perform strict validation in all possible cases. */ + if (mbc_buf_len == 0) + { + retry: + mbc_buf_index = 1; + *mbc_buf = c; + if (IS_ASCII_OCTET(c)) + r = do_append((LWCHAR) c, NULL, pos); + else if (IS_UTF8_LEAD(c)) + { + mbc_buf_len = utf_len(c); + mbc_pos = pos; + return (0); + } else + /* UTF8_INVALID or stray UTF8_TRAIL */ + r = flush_mbc_buf(pos); + } else if (IS_UTF8_TRAIL(c)) + { + mbc_buf[mbc_buf_index++] = c; + if (mbc_buf_index < mbc_buf_len) + return (0); + if (is_utf8_well_formed(mbc_buf)) + r = do_append(get_wchar(mbc_buf), mbc_buf, mbc_pos); + else + /* Complete, but not shortest form, sequence. */ + mbc_buf_index = r = flush_mbc_buf(mbc_pos); + mbc_buf_len = 0; + } else + { + /* Flush incomplete (truncated) sequence. */ + r = flush_mbc_buf(mbc_pos); + mbc_buf_index = r + 1; + mbc_buf_len = 0; + /* Handle new char. */ + if (!r) + goto retry; + } + } + + /* + * If we need to shift the line, do it. + * But wait until we get to at least the middle of the screen, + * so shifting it doesn't affect the chars we're currently + * pappending. (Bold & underline can get messed up otherwise.) + */ + if (cshift < hshift && column > sc_width / 2) + { + linebuf[curr] = '\0'; + pshift(hshift - cshift); + } + if (r) + { + /* How many chars should caller back up? */ + r = (!utf_mode) ? 1 : mbc_buf_index; + } + return (r); +} + + static int +do_append(ch, rep, pos) + LWCHAR ch; + char *rep; + POSITION pos; +{ + register int a; + LWCHAR prev_ch; + + a = AT_NORMAL; + + if (ch == '\b') + { + if (bs_mode == BS_CONTROL) + goto do_control_char; + + /* + * A better test is needed here so we don't + * backspace over part of the printed + * representation of a binary character. + */ + if ( curr <= lmargin + || column <= lmargin + || (attr[curr - 1] & (AT_ANSI|AT_BINARY))) + STORE_PRCHAR('\b', pos); + else if (bs_mode == BS_NORMAL) + STORE_CHAR(ch, AT_NORMAL, NULL, pos); + else if (bs_mode == BS_SPECIAL) + overstrike = backc(); + + return 0; + } + + if (overstrike > 0) + { + /* + * Overstrike the character at the current position + * in the line buffer. This will cause either + * underline (if a "_" is overstruck), + * bold (if an identical character is overstruck), + * or just deletion of the character in the buffer. + */ + overstrike = utf_mode ? -1 : 0; + /* To be correct, this must be a base character. */ + prev_ch = get_wchar(linebuf + curr); + a = attr[curr]; + if (ch == prev_ch) + { + /* + * Overstriking a char with itself means make it bold. + * But overstriking an underscore with itself is + * ambiguous. It could mean make it bold, or + * it could mean make it underlined. + * Use the previous overstrike to resolve it. + */ + if (ch == '_') + { + if ((a & (AT_BOLD|AT_UNDERLINE)) != AT_NORMAL) + a |= (AT_BOLD|AT_UNDERLINE); + else if (last_overstrike != AT_NORMAL) + a |= last_overstrike; + else + a |= AT_BOLD; + } else + a |= AT_BOLD; + } else if (ch == '_') + { + a |= AT_UNDERLINE; + ch = prev_ch; + rep = linebuf + curr; + } else if (prev_ch == '_') + { + a |= AT_UNDERLINE; + } + /* Else we replace prev_ch, but we keep its attributes. */ + } else if (overstrike < 0) + { + if ( is_composing_char(ch) + || is_combining_char(get_wchar(linebuf + curr), ch)) + /* Continuation of the same overstrike. */ + a = last_overstrike; + else + overstrike = 0; + } + + if (ch == '\t') + { + /* + * Expand a tab into spaces. + */ + switch (bs_mode) + { + case BS_CONTROL: + goto do_control_char; + case BS_NORMAL: + case BS_SPECIAL: + STORE_TAB(a, pos); + break; + } + } else if ((!utf_mode || is_ascii_char(ch)) && control_char((char)ch)) + { + do_control_char: + if (ctldisp == OPT_ON || (ctldisp == OPT_ONPLUS && ch == ESC)) + { + /* + * Output as a normal character. + */ + STORE_CHAR(ch, AT_NORMAL, rep, pos); + } else + { + STORE_PRCHAR((char) ch, pos); + } + } else if (utf_mode && ctldisp != OPT_ON && is_ubin_char(ch)) + { + char *s; + + s = prutfchar(ch); + + if (column + (int) strlen(s) - 1 + + pwidth(' ', binattr, 0) + attr_ewidth(binattr) > sc_width) + return (1); + + for ( ; *s != 0; s++) + STORE_CHAR(*s, AT_BINARY, NULL, pos); + } else + { + STORE_CHAR(ch, a, rep, pos); + } + return (0); +} + +/* + * + */ + public int +pflushmbc() +{ + int r = 0; + + if (mbc_buf_len > 0) + { + /* Flush incomplete (truncated) sequence. */ + r = flush_mbc_buf(mbc_pos); + mbc_buf_len = 0; + } + return r; +} + +/* + * Terminate the line in the line buffer. + */ + public void +pdone(endline) + int endline; +{ + (void) pflushmbc(); + + if (pendc && (pendc != '\r' || !endline)) + /* + * If we had a pending character, put it in the buffer. + * But discard a pending CR if we are at end of line + * (that is, discard the CR in a CR/LF sequence). + */ + (void) do_append(pendc, NULL, pendpos); + + /* + * Make sure we've shifted the line, if we need to. + */ + if (cshift < hshift) + pshift(hshift - cshift); + + if (ctldisp == OPT_ONPLUS && is_ansi_end('m')) + { + /* Switch to normal attribute at end of line. */ + char *p = "\033[m"; + for ( ; *p != '\0'; p++) + { + linebuf[curr] = *p; + attr[curr++] = AT_ANSI; + } + } + + /* + * Add a newline if necessary, + * and append a '\0' to the end of the line. + */ + if (column < sc_width || !auto_wrap || ignaw || ctldisp == OPT_ON) + { + linebuf[curr] = '\n'; + attr[curr] = AT_NORMAL; + curr++; + } + linebuf[curr] = '\0'; + attr[curr] = AT_NORMAL; + +#if HILITE_SEARCH + if (status_col && line_matches > 0) + { + linebuf[0] = '*'; + attr[0] = AT_NORMAL|AT_HILITE; + } +#endif +} + +/* + * Get a character from the current line. + * Return the character as the function return value, + * and the character attribute in *ap. + */ + public int +gline(i, ap) + register int i; + register int *ap; +{ + if (is_null_line) + { + /* + * If there is no current line, we pretend the line is + * either "~" or "", depending on the "twiddle" flag. + */ + if (twiddle) + { + if (i == 0) + { + *ap = AT_BOLD; + return '~'; + } + --i; + } + /* Make sure we're back to AT_NORMAL before the '\n'. */ + *ap = AT_NORMAL; + return i ? '\0' : '\n'; + } + + *ap = attr[i]; + return (linebuf[i] & 0xFF); +} + +/* + * Indicate that there is no current line. + */ + public void +null_line() +{ + is_null_line = 1; + cshift = 0; +} + +/* + * Analogous to forw_line(), but deals with "raw lines": + * lines which are not split for screen width. + * {{ This is supposed to be more efficient than forw_line(). }} + */ + public POSITION +forw_raw_line(curr_pos, linep) + POSITION curr_pos; + char **linep; +{ + register int n; + register int c; + POSITION new_pos; + + if (curr_pos == NULL_POSITION || ch_seek(curr_pos) || + (c = ch_forw_get()) == EOI) + return (NULL_POSITION); + + n = 0; + for (;;) + { + if (c == '\n' || c == EOI || ABORT_SIGS()) + { + new_pos = ch_tell(); + break; + } + if (n >= size_linebuf-1) + { + if (expand_linebuf()) + { + /* + * Overflowed the input buffer. + * Pretend the line ended here. + */ + new_pos = ch_tell() - 1; + break; + } + } + linebuf[n++] = c; + c = ch_forw_get(); + } + linebuf[n] = '\0'; + if (linep != NULL) + *linep = linebuf; + return (new_pos); +} + +/* + * Analogous to back_line(), but deals with "raw lines". + * {{ This is supposed to be more efficient than back_line(). }} + */ + public POSITION +back_raw_line(curr_pos, linep) + POSITION curr_pos; + char **linep; +{ + register int n; + register int c; + POSITION new_pos; + + if (curr_pos == NULL_POSITION || curr_pos <= ch_zero() || + ch_seek(curr_pos-1)) + return (NULL_POSITION); + + n = size_linebuf; + linebuf[--n] = '\0'; + for (;;) + { + c = ch_back_get(); + if (c == '\n' || ABORT_SIGS()) + { + /* + * This is the newline ending the previous line. + * We have hit the beginning of the line. + */ + new_pos = ch_tell() + 1; + break; + } + if (c == EOI) + { + /* + * We have hit the beginning of the file. + * This must be the first line in the file. + * This must, of course, be the beginning of the line. + */ + new_pos = ch_zero(); + break; + } + if (n <= 0) + { + int old_size_linebuf = size_linebuf; + char *fm; + char *to; + if (expand_linebuf()) + { + /* + * Overflowed the input buffer. + * Pretend the line ended here. + */ + new_pos = ch_tell() + 1; + break; + } + /* + * Shift the data to the end of the new linebuf. + */ + for (fm = linebuf + old_size_linebuf - 1, + to = linebuf + size_linebuf - 1; + fm >= linebuf; fm--, to--) + *to = *fm; + n = size_linebuf - old_size_linebuf; + } + linebuf[--n] = c; + } + if (linep != NULL) + *linep = &linebuf[n]; + return (new_pos); +} diff --git a/commands/less/less/linenum.c b/commands/less/less/linenum.c new file mode 100644 index 000000000..ea0b4acb2 --- /dev/null +++ b/commands/less/less/linenum.c @@ -0,0 +1,458 @@ +/* $NetBSD: linenum.c,v 1.8 2006/10/26 01:33:08 mrg Exp $ */ + +/* + * Copyright (C) 1984-2004 Mark Nudelman + * + * You may distribute under the terms of either the GNU General Public + * License or the Less License, as specified in the README file. + * + * For more information about less, or for information on how to + * contact the author, see the README file. + */ + + +/* + * Code to handle displaying line numbers. + * + * Finding the line number of a given file position is rather tricky. + * We don't want to just start at the beginning of the file and + * count newlines, because that is slow for large files (and also + * wouldn't work if we couldn't get to the start of the file; e.g. + * if input is a long pipe). + * + * So we use the function add_lnum to cache line numbers. + * We try to be very clever and keep only the more interesting + * line numbers when we run out of space in our table. A line + * number is more interesting than another when it is far from + * other line numbers. For example, we'd rather keep lines + * 100,200,300 than 100,101,300. 200 is more interesting than + * 101 because 101 can be derived very cheaply from 100, while + * 200 is more expensive to derive from 100. + * + * The function currline() returns the line number of a given + * position in the file. As a side effect, it calls add_lnum + * to cache the line number. Therefore currline is occasionally + * called to make sure we cache line numbers often enough. + */ + +#include "less.h" + +/* + * Structure to keep track of a line number and the associated file position. + * A doubly-linked circular list of line numbers is kept ordered by line number. + */ +struct linenum_info +{ + struct linenum_info *next; /* Link to next in the list */ + struct linenum_info *prev; /* Line to previous in the list */ + POSITION pos; /* File position */ + POSITION gap; /* Gap between prev and next */ + LINENUM line; /* Line number */ +}; +/* + * "gap" needs some explanation: the gap of any particular line number + * is the distance between the previous one and the next one in the list. + * ("Distance" means difference in file position.) In other words, the + * gap of a line number is the gap which would be introduced if this + * line number were deleted. It is used to decide which one to replace + * when we have a new one to insert and the table is full. + */ + +#define NPOOL 50 /* Size of line number pool */ + +#define LONGTIME (2) /* In seconds */ + +public int lnloop = 0; /* Are we in the line num loop? */ + +static struct linenum_info anchor; /* Anchor of the list */ +static struct linenum_info *freelist; /* Anchor of the unused entries */ +static struct linenum_info pool[NPOOL]; /* The pool itself */ +static struct linenum_info *spare; /* We always keep one spare entry */ + +extern int linenums; +extern int sigs; +extern int sc_height; + +static void calcgap __P((struct linenum_info *)); +static void longloopmessage __P((void)); +static void longish __P((void)); + +/* + * Initialize the line number structures. + */ + public void +clr_linenum() +{ + register struct linenum_info *p; + + /* + * Put all the entries on the free list. + * Leave one for the "spare". + */ + for (p = pool; p < &pool[NPOOL-2]; p++) + p->next = p+1; + pool[NPOOL-2].next = NULL; + freelist = pool; + + spare = &pool[NPOOL-1]; + + /* + * Initialize the anchor. + */ + anchor.next = anchor.prev = &anchor; + anchor.gap = 0; + anchor.pos = (POSITION)0; + anchor.line = 1; +} + +/* + * Calculate the gap for an entry. + */ + static void +calcgap(p) + register struct linenum_info *p; +{ + /* + * Don't bother to compute a gap for the anchor. + * Also don't compute a gap for the last one in the list. + * The gap for that last one should be considered infinite, + * but we never look at it anyway. + */ + if (p == &anchor || p->next == &anchor) + return; + p->gap = p->next->pos - p->prev->pos; +} + +/* + * Add a new line number to the cache. + * The specified position (pos) should be the file position of the + * FIRST character in the specified line. + */ + public void +add_lnum(linenum, pos) + LINENUM linenum; + POSITION pos; +{ + register struct linenum_info *p; + register struct linenum_info *new; + register struct linenum_info *nextp; + register struct linenum_info *prevp; + register POSITION mingap; + + /* + * Find the proper place in the list for the new one. + * The entries are sorted by position. + */ + for (p = anchor.next; p != &anchor && p->pos < pos; p = p->next) + if (p->line == linenum) + /* We already have this one. */ + return; + nextp = p; + prevp = p->prev; + + if (freelist != NULL) + { + /* + * We still have free (unused) entries. + * Use one of them. + */ + new = freelist; + freelist = freelist->next; + } else + { + /* + * No free entries. + * Use the "spare" entry. + */ + new = spare; + spare = NULL; + } + + /* + * Fill in the fields of the new entry, + * and insert it into the proper place in the list. + */ + new->next = nextp; + new->prev = prevp; + new->pos = pos; + new->line = linenum; + + nextp->prev = new; + prevp->next = new; + + /* + * Recalculate gaps for the new entry and the neighboring entries. + */ + calcgap(new); + calcgap(nextp); + calcgap(prevp); + + if (spare == NULL) + { + /* + * We have used the spare entry. + * Scan the list to find the one with the smallest + * gap, take it out and make it the spare. + * We should never remove the last one, so stop when + * we get to p->next == &anchor. This also avoids + * looking at the gap of the last one, which is + * not computed by calcgap. + */ + mingap = anchor.next->gap; + for (p = anchor.next; p->next != &anchor; p = p->next) + { + if (p->gap <= mingap) + { + spare = p; + mingap = p->gap; + } + } + spare->next->prev = spare->prev; + spare->prev->next = spare->next; + } +} + +/* + * If we get stuck in a long loop trying to figure out the + * line number, print a message to tell the user what we're doing. + */ + static void +longloopmessage() +{ + ierror("Calculating line numbers", NULL_PARG); + /* + * Set the lnloop flag here, so if the user interrupts while + * we are calculating line numbers, the signal handler will + * turn off line numbers (linenums=0). + */ + lnloop = 1; +} + +static int loopcount; +#if HAVE_TIME +static long startime; +#endif + + static void +longish() +{ +#if HAVE_TIME + if (loopcount >= 0 && ++loopcount > 100) + { + loopcount = 0; + if (get_time() >= startime + LONGTIME) + { + longloopmessage(); + loopcount = -1; + } + } +#else + if (loopcount >= 0 && ++loopcount > LONGLOOP) + { + longloopmessage(); + loopcount = -1; + } +#endif +} + +/* + * Find the line number associated with a given position. + * Return 0 if we can't figure it out. + */ + public LINENUM +find_linenum(pos) + POSITION pos; +{ + register struct linenum_info *p; + register LINENUM linenum; + POSITION cpos; + + if (!linenums) + /* + * We're not using line numbers. + */ + return (0); + if (pos == NULL_POSITION) + /* + * Caller doesn't know what he's talking about. + */ + return (0); + if (pos <= ch_zero()) + /* + * Beginning of file is always line number 1. + */ + return (1); + + /* + * Find the entry nearest to the position we want. + */ + for (p = anchor.next; p != &anchor && p->pos < pos; p = p->next) + continue; + if (p->pos == pos) + /* Found it exactly. */ + return (p->line); + + /* + * This is the (possibly) time-consuming part. + * We start at the line we just found and start + * reading the file forward or backward till we + * get to the place we want. + * + * First decide whether we should go forward from the + * previous one or backwards from the next one. + * The decision is based on which way involves + * traversing fewer bytes in the file. + */ +#if HAVE_TIME + startime = get_time(); +#endif + if (p == &anchor || pos - p->prev->pos < p->pos - pos) + { + /* + * Go forward. + */ + p = p->prev; + if (ch_seek(p->pos)) + return (0); + loopcount = 0; + for (linenum = p->line, cpos = p->pos; cpos < pos; linenum++) + { + /* + * Allow a signal to abort this loop. + */ + cpos = forw_raw_line(cpos, (char **)NULL); + if (ABORT_SIGS() || cpos == NULL_POSITION) + return (0); + longish(); + } + lnloop = 0; + /* + * We might as well cache it. + */ + add_lnum(linenum, cpos); + /* + * If the given position is not at the start of a line, + * make sure we return the correct line number. + */ + if (cpos > pos) + linenum--; + } else + { + /* + * Go backward. + */ + if (ch_seek(p->pos)) + return (0); + loopcount = 0; + for (linenum = p->line, cpos = p->pos; cpos > pos; linenum--) + { + /* + * Allow a signal to abort this loop. + */ + cpos = back_raw_line(cpos, (char **)NULL); + if (ABORT_SIGS() || cpos == NULL_POSITION) + return (0); + longish(); + } + lnloop = 0; + /* + * We might as well cache it. + */ + add_lnum(linenum, cpos); + } + + return (linenum); +} + +/* + * Find the position of a given line number. + * Return NULL_POSITION if we can't figure it out. + */ + public POSITION +find_pos(linenum) + LINENUM linenum; +{ + register struct linenum_info *p; + POSITION cpos; + LINENUM clinenum; + + if (linenum <= 1) + /* + * Line number 1 is beginning of file. + */ + return (ch_zero()); + + /* + * Find the entry nearest to the line number we want. + */ + for (p = anchor.next; p != &anchor && p->line < linenum; p = p->next) + continue; + if (p->line == linenum) + /* Found it exactly. */ + return (p->pos); + + if (p == &anchor || linenum - p->prev->line < p->line - linenum) + { + /* + * Go forward. + */ + p = p->prev; + if (ch_seek(p->pos)) + return (NULL_POSITION); + for (clinenum = p->line, cpos = p->pos; clinenum < linenum; clinenum++) + { + /* + * Allow a signal to abort this loop. + */ + cpos = forw_raw_line(cpos, (char **)NULL); + if (ABORT_SIGS() || cpos == NULL_POSITION) + return (NULL_POSITION); + } + } else + { + /* + * Go backward. + */ + if (ch_seek(p->pos)) + return (NULL_POSITION); + for (clinenum = p->line, cpos = p->pos; clinenum > linenum; clinenum--) + { + /* + * Allow a signal to abort this loop. + */ + cpos = back_raw_line(cpos, (char **)NULL); + if (ABORT_SIGS() || cpos == NULL_POSITION) + return (NULL_POSITION); + } + } + /* + * We might as well cache it. + */ + add_lnum(clinenum, cpos); + return (cpos); +} + +/* + * Return the line number of the "current" line. + * The argument "where" tells which line is to be considered + * the "current" line (e.g. TOP, BOTTOM, MIDDLE, etc). + */ + public LINENUM +currline(where) + int where; +{ + POSITION pos; + POSITION len; + LINENUM linenum; + + pos = position(where); + len = ch_length(); + while (pos == NULL_POSITION && where >= 0 && where < sc_height) + pos = position(++where); + if (pos == NULL_POSITION) + pos = len; + linenum = find_linenum(pos); + if (pos == len) + linenum--; + return (linenum); +} diff --git a/commands/less/less/lsystem.c b/commands/less/less/lsystem.c new file mode 100644 index 000000000..a8f9fc86e --- /dev/null +++ b/commands/less/less/lsystem.c @@ -0,0 +1,370 @@ +/* $NetBSD: lsystem.c,v 1.8 2006/10/26 01:33:08 mrg Exp $ */ + +/* + * Copyright (C) 1984-2005 Mark Nudelman + * + * You may distribute under the terms of either the GNU General Public + * License or the Less License, as specified in the README file. + * + * For more information about less, or for information on how to + * contact the author, see the README file. + */ + + +/* + * Routines to execute other programs. + * Necessarily very OS dependent. + */ + +#include "less.h" +#include +#include "position.h" + +#if MSDOS_COMPILER +#include +#ifdef _MSC_VER +#include +#define setdisk(n) _chdrive((n)+1) +#else +#include +#endif +#endif + +extern int screen_trashed; +extern IFILE curr_ifile; + + +#if HAVE_SYSTEM + +/* + * Pass the specified command to a shell to be executed. + * Like plain "system()", but handles resetting terminal modes, etc. + */ + public void +lsystem(cmd, donemsg) + char *cmd; + char *donemsg; +{ + register int inp; +#if HAVE_SHELL + register char *shell; + register char *p; +#endif + IFILE save_ifile; +#if MSDOS_COMPILER + char cwd[FILENAME_MAX+1]; +#endif + + /* + * Print the command which is to be executed, + * unless the command starts with a "-". + */ + if (cmd[0] == '-') + cmd++; + else + { + clear_bot(); + putstr("!"); + putstr(cmd); + putstr("\n"); + } + +#if MSDOS_COMPILER + /* + * Working directory is global on MSDOS. + * The child might change the working directory, so we + * must save and restore CWD across calls to "system", + * or else we won't find our file when we return and + * try to "reedit_ifile" it. + */ + getcwd(cwd, FILENAME_MAX); +#endif + + /* + * Close the current input file. + */ + save_ifile = save_curr_ifile(); + (void) edit_ifile(NULL_IFILE); + + /* + * De-initialize the terminal and take out of raw mode. + */ + deinit(); + flush(); /* Make sure the deinit chars get out */ + raw_mode(0); +#if MSDOS_COMPILER==WIN32C + close_getchr(); +#endif + + /* + * Restore signals to their defaults. + */ + init_signals(0); + +#if HAVE_DUP + /* + * Force standard input to be the user's terminal + * (the normal standard input), even if less's standard input + * is coming from a pipe. + */ + inp = dup(0); + close(0); +#if OS2 + /* The __open() system call translates "/dev/tty" to "con". */ + if (__open("/dev/tty", OPEN_READ) < 0) +#else + if (open("/dev/tty", OPEN_READ) < 0) +#endif + dup(inp); +#endif + + /* + * Pass the command to the system to be executed. + * If we have a SHELL environment variable, use + * <$SHELL -c "command"> instead of just . + * If the command is empty, just invoke a shell. + */ +#if HAVE_SHELL + p = NULL; + if ((shell = lgetenv("SHELL")) != NULL && *shell != '\0') + { + if (*cmd == '\0') + p = save(shell); + else + { + char *esccmd = shell_quote(cmd); + if (esccmd != NULL) + { + int len = strlen(shell) + strlen(esccmd) + 5; + p = (char *) ecalloc(len, sizeof(char)); + SNPRINTF3(p, len, "%s %s %s", shell, shell_coption(), esccmd); + free(esccmd); + } + } + } + if (p == NULL) + { + if (*cmd == '\0') + p = save("sh"); + else + p = save(cmd); + } + system(p); + free(p); +#else +#if MSDOS_COMPILER==DJGPPC + /* + * Make stdin of the child be in cooked mode. + */ + setmode(0, O_TEXT); + /* + * We don't need to catch signals of the child (it + * also makes trouble with some DPMI servers). + */ + __djgpp_exception_toggle(); + system(cmd); + __djgpp_exception_toggle(); +#else + system(cmd); +#endif +#endif + +#if HAVE_DUP + /* + * Restore standard input, reset signals, raw mode, etc. + */ + close(0); + dup(inp); + close(inp); +#endif + +#if MSDOS_COMPILER==WIN32C + open_getchr(); +#endif + init_signals(1); + raw_mode(1); + if (donemsg != NULL) + { + putstr(donemsg); + putstr(" (press RETURN)"); + get_return(); + putchr('\n'); + flush(); + } + init(); + screen_trashed = 1; + +#if MSDOS_COMPILER + /* + * Restore the previous directory (possibly + * changed by the child program we just ran). + */ + chdir(cwd); +#if MSDOS_COMPILER != DJGPPC + /* + * Some versions of chdir() don't change to the drive + * which is part of CWD. (DJGPP does this in chdir.) + */ + if (cwd[1] == ':') + { + if (cwd[0] >= 'a' && cwd[0] <= 'z') + setdisk(cwd[0] - 'a'); + else if (cwd[0] >= 'A' && cwd[0] <= 'Z') + setdisk(cwd[0] - 'A'); + } +#endif +#endif + + /* + * Reopen the current input file. + */ + reedit_ifile(save_ifile); + +#if defined(SIGWINCH) || defined(SIGWIND) + /* + * Since we were ignoring window change signals while we executed + * the system command, we must assume the window changed. + * Warning: this leaves a signal pending (in "sigs"), + * so psignals() should be called soon after lsystem(). + */ + winch(0); +#endif +} + +#endif + +#if PIPEC + +/* + * Pipe a section of the input file into the given shell command. + * The section to be piped is the section "between" the current + * position and the position marked by the given letter. + * + * If the mark is after the current screen, the section between + * the top line displayed and the mark is piped. + * If the mark is before the current screen, the section between + * the mark and the bottom line displayed is piped. + * If the mark is on the current screen, or if the mark is ".", + * the whole current screen is piped. + */ + public int +pipe_mark(c, cmd) + int c; + char *cmd; +{ + POSITION mpos, tpos, bpos; + + /* + * mpos = the marked position. + * tpos = top of screen. + * bpos = bottom of screen. + */ + mpos = markpos(c); + if (mpos == NULL_POSITION) + return (-1); + tpos = position(TOP); + if (tpos == NULL_POSITION) + tpos = ch_zero(); + bpos = position(BOTTOM); + + if (c == '.') + return (pipe_data(cmd, tpos, bpos)); + else if (mpos <= tpos) + return (pipe_data(cmd, mpos, bpos)); + else if (bpos == NULL_POSITION) + return (pipe_data(cmd, tpos, bpos)); + else + return (pipe_data(cmd, tpos, mpos)); +} + +/* + * Create a pipe to the given shell command. + * Feed it the file contents between the positions spos and epos. + */ + public int +pipe_data(cmd, spos, epos) + char *cmd; + POSITION spos; + POSITION epos; +{ + register FILE *f; + register int c; + + /* + * This is structured much like lsystem(). + * Since we're running a shell program, we must be careful + * to perform the necessary deinitialization before running + * the command, and reinitialization after it. + */ + if (ch_seek(spos) != 0) + { + error("Cannot seek to start position", NULL_PARG); + return (-1); + } + + if ((f = popen(cmd, "w")) == NULL) + { + error("Cannot create pipe", NULL_PARG); + return (-1); + } + clear_bot(); + putstr("!"); + putstr(cmd); + putstr("\n"); + + deinit(); + flush(); + raw_mode(0); + init_signals(0); +#if MSDOS_COMPILER==WIN32C + close_getchr(); +#endif +#ifdef SIGPIPE + LSIGNAL(SIGPIPE, SIG_IGN); +#endif + + c = EOI; + while (epos == NULL_POSITION || spos++ <= epos) + { + /* + * Read a character from the file and give it to the pipe. + */ + c = ch_forw_get(); + if (c == EOI) + break; + if (putc(c, f) == EOF) + break; + } + + /* + * Finish up the last line. + */ + while (c != '\n' && c != EOI ) + { + c = ch_forw_get(); + if (c == EOI) + break; + if (putc(c, f) == EOF) + break; + } + + pclose(f); + +#ifdef SIGPIPE + LSIGNAL(SIGPIPE, SIG_DFL); +#endif +#if MSDOS_COMPILER==WIN32C + open_getchr(); +#endif + init_signals(1); + raw_mode(1); + init(); + screen_trashed = 1; +#if defined(SIGWINCH) || defined(SIGWIND) + /* {{ Probably don't need this here. }} */ + winch(0); +#endif + return (0); +} + +#endif diff --git a/commands/less/less/main.c b/commands/less/less/main.c new file mode 100644 index 000000000..21158787b --- /dev/null +++ b/commands/less/less/main.c @@ -0,0 +1,407 @@ +/* $NetBSD: main.c,v 1.14 2008/08/28 07:20:20 mrg Exp $ */ + +/* + * Copyright (C) 1984-2004 Mark Nudelman + * + * You may distribute under the terms of either the GNU General Public + * License or the Less License, as specified in the README file. + * + * For more information about less, or for information on how to + * contact the author, see the README file. + */ + + +/* + * Entry point, initialization, miscellaneous routines. + */ + +#include "less.h" +#if MSDOS_COMPILER==WIN32C +#include +#endif + +public char * every_first_cmd = NULL; +public int new_file; +public int is_tty; +public IFILE curr_ifile = NULL_IFILE; +public IFILE old_ifile = NULL_IFILE; +public struct scrpos initial_scrpos; +public int any_display = FALSE; +public POSITION start_attnpos = NULL_POSITION; +public POSITION end_attnpos = NULL_POSITION; +public int wscroll; +public char * progname; +public int quitting; +public int secure; +public int dohelp; +public int more_mode = 0; + +#if LOGFILE +public int logfile = -1; +public int force_logfile = FALSE; +public char * namelogfile = NULL; +#endif + +#if EDITOR +public char * editor; +public char * editproto; +#endif + +#if TAGS +extern char * tags; +extern char * tagoption; +extern int jump_sline; +#endif + +#ifdef WIN32 +static char consoleTitle[256]; +#endif + +extern int missing_cap; +extern int know_dumb; + + +/* + * Entry point. + */ +int +main(argc, argv) + int argc; + char *argv[]; +{ + IFILE ifile; + char *s; + +#ifdef __EMX__ + _response(&argc, &argv); + _wildcard(&argc, &argv); +#endif + + progname = *argv++; + argc--; + + secure = 0; + s = lgetenv("LESSSECURE"); + if (s != NULL && *s != '\0') + secure = 1; + +#ifdef WIN32 + if (getenv("HOME") == NULL) + { + /* + * If there is no HOME environment variable, + * try the concatenation of HOMEDRIVE + HOMEPATH. + */ + char *drive = getenv("HOMEDRIVE"); + char *path = getenv("HOMEPATH"); + if (drive != NULL && path != NULL) + { + char *env = (char *) ecalloc(strlen(drive) + + strlen(path) + 6, sizeof(char)); + strcpy(env, "HOME="); + strcat(env, drive); + strcat(env, path); + putenv(env); + } + } + GetConsoleTitle(consoleTitle, sizeof(consoleTitle)/sizeof(char)); +#endif /* WIN32 */ + + /* + * Process command line arguments and LESS environment arguments. + * Command line arguments override environment arguments. + */ + if (strcmp(getprogname(), "more") == 0) + more_mode = 1; + + is_tty = isatty(1); + get_term(); + init_cmds(); + init_prompt(); + init_charset(); + init_line(); + init_cmdhist(); + init_option(); + + if (more_mode) { + scan_option("-E"); + scan_option("-m"); + scan_option("-G"); + scan_option("-f"); + s = lgetenv("MORE"); + } else + s = lgetenv("LESS"); + if (s != NULL) + scan_option(save(s)); + +#define isoptstring(s) (((s)[0] == '-' || (s)[0] == '+') && (s)[1] != '\0') + while (argc > 0 && (isoptstring(*argv) || isoptpending())) + { + s = *argv++; + argc--; + if (strcmp(s, "--") == 0) + break; + scan_option(s); + } +#undef isoptstring + + if (isoptpending()) + { + /* + * Last command line option was a flag requiring a + * following string, but there was no following string. + */ + nopendopt(); + quit(QUIT_OK); + } + +#if EDITOR + editor = lgetenv("VISUAL"); + if (editor == NULL || *editor == '\0') + { + editor = lgetenv("EDITOR"); + if (editor == NULL || *editor == '\0') + editor = EDIT_PGM; + } + editproto = lgetenv("LESSEDIT"); + if (editproto == NULL || *editproto == '\0') + editproto = "%E ?lm+%lm. %f"; +#endif + + /* + * Call get_ifile with all the command line filenames + * to "register" them with the ifile system. + */ + ifile = NULL_IFILE; + if (dohelp) + ifile = get_ifile(FAKE_HELPFILE, ifile); + while (argc-- > 0) + { + char *filename; +#if (MSDOS_COMPILER && MSDOS_COMPILER != DJGPPC) + /* + * Because the "shell" doesn't expand filename patterns, + * treat each argument as a filename pattern rather than + * a single filename. + * Expand the pattern and iterate over the expanded list. + */ + struct textlist tlist; + char *gfilename; + + gfilename = lglob(*argv++); + init_textlist(&tlist, gfilename); + filename = NULL; + while ((filename = forw_textlist(&tlist, filename)) != NULL) + { + (void) get_ifile(filename, ifile); + ifile = prev_ifile(NULL_IFILE); + } + free(gfilename); +#else + filename = shell_quote(*argv); + if (filename == NULL) + filename = *argv; + argv++; + (void) get_ifile(filename, ifile); + ifile = prev_ifile(NULL_IFILE); +#endif + } + /* + * Set up terminal, etc. + */ + if (!is_tty) + { + /* + * Output is not a tty. + * Just copy the input file(s) to output. + */ + SET_BINARY(1); + if (nifile() == 0) + { + if (edit_stdin() == 0) + cat_file(); + } else if (edit_first() == 0) + { + do { + cat_file(); + } while (edit_next(1) == 0); + } + quit(QUIT_OK); + } + + if (missing_cap && !know_dumb && !more_mode) + error("WARNING: terminal is not fully functional", NULL_PARG); + init_mark(); + open_getchr(); + raw_mode(1); + init_signals(1); + + /* + * Select the first file to examine. + */ +#if TAGS + if (tagoption != NULL || strcmp(tags, "-") == 0) + { + /* + * A -t option was given. + * Verify that no filenames were also given. + * Edit the file selected by the "tags" search, + * and search for the proper line in the file. + */ + if (nifile() > 0) + { + error("No filenames allowed with -t option", NULL_PARG); + quit(QUIT_ERROR); + } + findtag(tagoption); + if (edit_tagfile()) /* Edit file which contains the tag */ + quit(QUIT_ERROR); + /* + * Search for the line which contains the tag. + * Set up initial_scrpos so we display that line. + */ + initial_scrpos.pos = tagsearch(); + if (initial_scrpos.pos == NULL_POSITION) + quit(QUIT_ERROR); + initial_scrpos.ln = jump_sline; + } else +#endif + if (nifile() == 0) + { + if (edit_stdin()) /* Edit standard input */ + quit(QUIT_ERROR); + } else + { + if (edit_first()) /* Edit first valid file in cmd line */ + quit(QUIT_ERROR); + } + + init(); + commands(); + quit(QUIT_OK); + /*NOTREACHED*/ + return (0); +} + +/* + * Copy a string to a "safe" place + * (that is, to a buffer allocated by calloc). + */ + public char * +save(s) + char *s; +{ + register char *p; + + p = (char *) ecalloc(strlen(s)+1, sizeof(char)); + strcpy(p, s); + return (p); +} + +/* + * Allocate memory. + * Like calloc(), but never returns an error (NULL). + */ + public VOID_POINTER +ecalloc(count, size) + int count; + unsigned int size; +{ + register VOID_POINTER p; + + p = (VOID_POINTER) calloc(count, size); + if (p != NULL) + return (p); + error("Cannot allocate memory", NULL_PARG); + quit(QUIT_ERROR); + /*NOTREACHED*/ + return (NULL); +} + +/* + * Skip leading spaces in a string. + */ + public char * +skipsp(s) + register char *s; +{ + while (*s == ' ' || *s == '\t') + s++; + return (s); +} + +/* + * See how many characters of two strings are identical. + * If uppercase is true, the first string must begin with an uppercase + * character; the remainder of the first string may be either case. + */ + public int +sprefix(ps, s, uppercase) + char *ps; + char *s; + int uppercase; +{ + register int c; + register int sc; + register int len = 0; + + for ( ; *s != '\0'; s++, ps++) + { + c = *ps; + if (uppercase) + { + if (len == 0 && ASCII_IS_LOWER(c)) + return (-1); + if (ASCII_IS_UPPER(c)) + c = ASCII_TO_LOWER(c); + } + sc = *s; + if (len > 0 && ASCII_IS_UPPER(sc)) + sc = ASCII_TO_LOWER(sc); + if (c != sc) + break; + len++; + } + return (len); +} + +/* + * Exit the program. + */ + public void +quit(status) + int status; +{ + static int save_status; + + /* + * Put cursor at bottom left corner, clear the line, + * reset the terminal modes, and exit. + */ + if (status < 0) + status = save_status; + else + save_status = status; + quitting = 1; + edit((char*)NULL); + save_cmdhist(); + if (any_display && is_tty) + clear_bot(); + deinit(); + flush(); + raw_mode(0); +#if MSDOS_COMPILER && MSDOS_COMPILER != DJGPPC + /* + * If we don't close 2, we get some garbage from + * 2's buffer when it flushes automatically. + * I cannot track this one down RB + * The same bug shows up if we use ^C^C to abort. + */ + close(2); +#endif +#if WIN32 + SetConsoleTitle(consoleTitle); +#endif + close_getchr(); + exit(status); +} diff --git a/commands/less/less/mark.c b/commands/less/less/mark.c new file mode 100644 index 000000000..4f84e972e --- /dev/null +++ b/commands/less/less/mark.c @@ -0,0 +1,260 @@ +/* $NetBSD: mark.c,v 1.6 2006/10/26 01:33:08 mrg Exp $ */ + +/* + * Copyright (C) 1984-2004 Mark Nudelman + * + * You may distribute under the terms of either the GNU General Public + * License or the Less License, as specified in the README file. + * + * For more information about less, or for information on how to + * contact the author, see the README file. + */ + + +#include "less.h" + +extern IFILE curr_ifile; +extern int sc_height; +extern int jump_sline; + +/* + * A mark is an ifile (input file) plus a position within the file. + */ +struct mark { + IFILE m_ifile; + struct scrpos m_scrpos; +}; + +/* + * The table of marks. + * Each mark is identified by a lowercase or uppercase letter. + * The final one is lmark, for the "last mark"; addressed by the apostrophe. + */ +#define NMARKS ((2*26)+1) /* a-z, A-Z, lastmark */ +#define LASTMARK (NMARKS-1) +static struct mark marks[NMARKS]; + +/* + * Initialize the mark table to show no marks are set. + */ + public void +init_mark() +{ + int i; + + for (i = 0; i < NMARKS; i++) + marks[i].m_scrpos.pos = NULL_POSITION; +} + +/* + * See if a mark letter is valid (between a and z). + */ + static struct mark * +getumark(c) + int c; +{ + if (c >= 'a' && c <= 'z') + return (&marks[c-'a']); + + if (c >= 'A' && c <= 'Z') + return (&marks[c-'A'+26]); + + error("Invalid mark letter", NULL_PARG); + return (NULL); +} + +/* + * Get the mark structure identified by a character. + * The mark struct may come either from the mark table + * or may be constructed on the fly for certain characters like ^, $. + */ + static struct mark * +getmark(c) + int c; +{ + register struct mark *m; + static struct mark sm; + + switch (c) + { + case '^': + /* + * Beginning of the current file. + */ + m = &sm; + m->m_scrpos.pos = ch_zero(); + m->m_scrpos.ln = 0; + m->m_ifile = curr_ifile; + break; + case '$': + /* + * End of the current file. + */ + if (ch_end_seek()) + { + error("Cannot seek to end of file", NULL_PARG); + return (NULL); + } + m = &sm; + m->m_scrpos.pos = ch_tell(); + m->m_scrpos.ln = sc_height-1; + m->m_ifile = curr_ifile; + break; + case '.': + /* + * Current position in the current file. + */ + m = &sm; + get_scrpos(&m->m_scrpos); + m->m_ifile = curr_ifile; + break; + case '\'': + /* + * The "last mark". + */ + m = &marks[LASTMARK]; + break; + default: + /* + * Must be a user-defined mark. + */ + m = getumark(c); + if (m == NULL) + break; + if (m->m_scrpos.pos == NULL_POSITION) + { + error("Mark not set", NULL_PARG); + return (NULL); + } + break; + } + return (m); +} + +/* + * Is a mark letter is invalid? + */ + public int +badmark(c) + int c; +{ + return (getmark(c) == NULL); +} + +/* + * Set a user-defined mark. + */ + public void +setmark(c) + int c; +{ + register struct mark *m; + struct scrpos scrpos; + + m = getumark(c); + if (m == NULL) + return; + get_scrpos(&scrpos); + m->m_scrpos = scrpos; + m->m_ifile = curr_ifile; +} + +/* + * Set lmark (the mark named by the apostrophe). + */ + public void +lastmark() +{ + struct scrpos scrpos; + + if (ch_getflags() & CH_HELPFILE) + return; + get_scrpos(&scrpos); + if (scrpos.pos == NULL_POSITION) + return; + marks[LASTMARK].m_scrpos = scrpos; + marks[LASTMARK].m_ifile = curr_ifile; +} + +/* + * Go to a mark. + */ + public void +gomark(c) + int c; +{ + register struct mark *m; + struct scrpos scrpos; + + m = getmark(c); + if (m == NULL) + return; + + /* + * If we're trying to go to the lastmark and + * it has not been set to anything yet, + * set it to the beginning of the current file. + */ + if (m == &marks[LASTMARK] && m->m_scrpos.pos == NULL_POSITION) + { + m->m_ifile = curr_ifile; + m->m_scrpos.pos = ch_zero(); + m->m_scrpos.ln = jump_sline; + } + + /* + * If we're using lmark, we must save the screen position now, + * because if we call edit_ifile() below, lmark will change. + * (We save the screen position even if we're not using lmark.) + */ + scrpos = m->m_scrpos; + if (m->m_ifile != curr_ifile) + { + /* + * Not in the current file; edit the correct file. + */ + if (edit_ifile(m->m_ifile)) + return; + } + + jump_loc(scrpos.pos, scrpos.ln); +} + +/* + * Return the position associated with a given mark letter. + * + * We don't return which screen line the position + * is associated with, but this doesn't matter much, + * because it's always the first non-blank line on the screen. + */ + public POSITION +markpos(c) + int c; +{ + register struct mark *m; + + m = getmark(c); + if (m == NULL) + return (NULL_POSITION); + + if (m->m_ifile != curr_ifile) + { + error("Mark not in current file", NULL_PARG); + return (NULL_POSITION); + } + return (m->m_scrpos.pos); +} + +/* + * Clear the marks associated with a specified ifile. + */ + public void +unmark(ifile) + IFILE ifile; +{ + int i; + + for (i = 0; i < NMARKS; i++) + if (marks[i].m_ifile == ifile) + marks[i].m_scrpos.pos = NULL_POSITION; +} diff --git a/commands/less/less/optfunc.c b/commands/less/less/optfunc.c new file mode 100644 index 000000000..63e3749ed --- /dev/null +++ b/commands/less/less/optfunc.c @@ -0,0 +1,602 @@ +/* + * Copyright (C) 1984-2005 Mark Nudelman + * + * You may distribute under the terms of either the GNU General Public + * License or the Less License, as specified in the README file. + * + * For more information about less, or for information on how to + * contact the author, see the README file. + */ + + +/* + * Handling functions for command line options. + * + * Most options are handled by the generic code in option.c. + * But all string options, and a few non-string options, require + * special handling specific to the particular option. + * This special processing is done by the "handling functions" in this file. + * + * Each handling function is passed a "type" and, if it is a string + * option, the string which should be "assigned" to the option. + * The type may be one of: + * INIT The option is being initialized from the command line. + * TOGGLE The option is being changed from within the program. + * QUERY The setting of the option is merely being queried. + */ + +#include "less.h" +#include "option.h" + +extern int nbufs; +extern int bufspace; +extern int pr_type; +extern int plusoption; +extern int swindow; +extern int sc_height; +extern int secure; +extern int dohelp; +extern int any_display; +extern int less_is_more; +extern char openquote; +extern char closequote; +extern char constant *prproto[]; +extern char constant *eqproto; +extern char constant *hproto; +extern char constant *wproto; +extern IFILE curr_ifile; +extern char version[]; +#if LOGFILE +extern char *namelogfile; +extern int force_logfile; +extern int logfile; +#endif +#if TAGS +public char *tagoption = NULL; +extern char *tags; +extern int jump_sline; +#endif +#if MSDOS_COMPILER +extern int nm_fg_color, nm_bg_color; +extern int bo_fg_color, bo_bg_color; +extern int ul_fg_color, ul_bg_color; +extern int so_fg_color, so_bg_color; +extern int bl_fg_color, bl_bg_color; +#endif + + +#if LOGFILE +/* + * Handler for -o option. + */ + public void +opt_o(type, s) + int type; + char *s; +{ + PARG parg; + + if (secure) + { + error("log file support is not available", NULL_PARG); + return; + } + switch (type) + { + case INIT: + namelogfile = s; + break; + case TOGGLE: + if (ch_getflags() & CH_CANSEEK) + { + error("Input is not a pipe", NULL_PARG); + return; + } + if (logfile >= 0) + { + error("Log file is already in use", NULL_PARG); + return; + } + s = skipsp(s); + namelogfile = lglob(s); + use_logfile(namelogfile); + sync_logfile(); + break; + case QUERY: + if (logfile < 0) + error("No log file", NULL_PARG); + else + { + parg.p_string = namelogfile; + error("Log file \"%s\"", &parg); + } + break; + } +} + +/* + * Handler for -O option. + */ + public void +opt__O(type, s) + int type; + char *s; +{ + force_logfile = TRUE; + opt_o(type, s); +} +#endif + +/* + * Handlers for -l option. + */ + public void +opt_l(type, s) + int type; + char *s; +{ + int err; + int n; + char *t; + + switch (type) + { + case INIT: + t = s; + n = getnum(&t, "l", &err); + if (err || n <= 0) + { + error("Line number is required after -l", NULL_PARG); + return; + } + plusoption = TRUE; + ungetsc(s); + break; + } +} + +#if USERFILE + public void +opt_k(type, s) + int type; + char *s; +{ + PARG parg; + + switch (type) + { + case INIT: + if (lesskey(s, 0)) + { + parg.p_string = s; + error("Cannot use lesskey file \"%s\"", &parg); + } + break; + } +} +#endif + +#if TAGS +/* + * Handler for -t option. + */ + public void +opt_t(type, s) + int type; + char *s; +{ + IFILE save_ifile; + POSITION pos; + + switch (type) + { + case INIT: + tagoption = s; + /* Do the rest in main() */ + break; + case TOGGLE: + if (secure) + { + error("tags support is not available", NULL_PARG); + break; + } + findtag(skipsp(s)); + save_ifile = save_curr_ifile(); + /* + * Try to open the file containing the tag + * and search for the tag in that file. + */ + if (edit_tagfile() || (pos = tagsearch()) == NULL_POSITION) + { + /* Failed: reopen the old file. */ + reedit_ifile(save_ifile); + break; + } + unsave_ifile(save_ifile); + jump_loc(pos, jump_sline); + break; + } +} + +/* + * Handler for -T option. + */ + public void +opt__T(type, s) + int type; + char *s; +{ + PARG parg; + + switch (type) + { + case INIT: + tags = s; + break; + case TOGGLE: + s = skipsp(s); + tags = lglob(s); + break; + case QUERY: + parg.p_string = tags; + error("Tags file \"%s\"", &parg); + break; + } +} +#endif + +/* + * Handler for -p option. + */ + public void +opt_p(type, s) + int type; + register char *s; +{ + switch (type) + { + case INIT: + /* + * Unget a search command for the specified string. + * {{ This won't work if the "/" command is + * changed or invalidated by a .lesskey file. }} + */ + plusoption = TRUE; + ungetsc(s); + /* + * In "more" mode, the -p argument is a command, + * not a search string, so we don't need a slash. + */ + if (!less_is_more); + ungetsc("/"); + break; + } +} + +/* + * Handler for -P option. + */ + public void +opt__P(type, s) + int type; + register char *s; +{ + register constant char **proto; + PARG parg; + + switch (type) + { + case INIT: + case TOGGLE: + /* + * Figure out which prototype string should be changed. + */ + switch (*s) + { + case 's': proto = &prproto[PR_SHORT]; s++; break; + case 'm': proto = &prproto[PR_MEDIUM]; s++; break; + case 'M': proto = &prproto[PR_LONG]; s++; break; + case '=': proto = &eqproto; s++; break; + case 'h': proto = &hproto; s++; break; + case 'w': proto = &wproto; s++; break; + default: proto = &prproto[PR_SHORT]; break; + } + free((void *)*proto); + *proto = save(s); + break; + case QUERY: + parg.p_string = prproto[pr_type]; + error("%s", &parg); + break; + } +} + +/* + * Handler for the -b option. + */ + /*ARGSUSED*/ + public void +opt_b(type, s) + int type; + char *s; +{ + switch (type) + { + case INIT: + case TOGGLE: + /* + * Set the new number of buffers. + */ + ch_setbufspace(bufspace); + break; + case QUERY: + break; + } +} + +/* + * Handler for the -i option. + */ + /*ARGSUSED*/ + public void +opt_i(type, s) + int type; + char *s; +{ + switch (type) + { + case TOGGLE: + chg_caseless(); + break; + case QUERY: + case INIT: + break; + } +} + +/* + * Handler for the -V option. + */ + /*ARGSUSED*/ + public void +opt__V(type, s) + int type; + char *s; +{ + switch (type) + { + case TOGGLE: + case QUERY: + dispversion(); + break; + case INIT: + /* + * Force output to stdout per GNU standard for --version output. + */ + any_display = 1; + putstr("less "); + putstr(version); + putstr("\nCopyright (C) 1984-2005 Mark Nudelman\n\n"); + putstr("less comes with NO WARRANTY, to the extent permitted by law.\n"); + putstr("For information about the terms of redistribution,\n"); + putstr("see the file named README in the less distribution.\n"); + putstr("Homepage: http://www.greenwoodsoftware.com/less\n"); + quit(QUIT_OK); + break; + } +} + +#if MSDOS_COMPILER +/* + * Parse an MSDOS color descriptor. + */ + static void +colordesc(s, fg_color, bg_color) + char *s; + int *fg_color; + int *bg_color; +{ + int fg, bg; + int err; + + fg = getnum(&s, "D", &err); + if (err) + { + error("Missing fg color in -D", NULL_PARG); + return; + } + if (*s != '.') + bg = 0; + else + { + s++; + bg = getnum(&s, "D", &err); + if (err) + { + error("Missing fg color in -D", NULL_PARG); + return; + } + } + if (*s != '\0') + error("Extra characters at end of -D option", NULL_PARG); + *fg_color = fg; + *bg_color = bg; +} + +/* + * Handler for the -D option. + */ + /*ARGSUSED*/ + public void +opt_D(type, s) + int type; + char *s; +{ + switch (type) + { + case INIT: + case TOGGLE: + switch (*s++) + { + case 'n': + colordesc(s, &nm_fg_color, &nm_bg_color); + break; + case 'd': + colordesc(s, &bo_fg_color, &bo_bg_color); + break; + case 'u': + colordesc(s, &ul_fg_color, &ul_bg_color); + break; + case 'k': + colordesc(s, &bl_fg_color, &bl_bg_color); + break; + case 's': + colordesc(s, &so_fg_color, &so_bg_color); + break; + default: + error("-D must be followed by n, d, u, k or s", NULL_PARG); + break; + } + if (type == TOGGLE) + { + at_enter(AT_STANDOUT); + at_exit(); + } + break; + case QUERY: + break; + } +} +#endif + +/* + * Handler for the -x option. + */ + public void +opt_x(type, s) + int type; + register char *s; +{ + extern int tabstops[]; + extern int ntabstops; + extern int tabdefault; + char msg[60+(4*TABSTOP_MAX)]; + int i; + PARG p; + + switch (type) + { + case INIT: + case TOGGLE: + /* Start at 1 because tabstops[0] is always zero. */ + for (i = 1; i < TABSTOP_MAX; ) + { + int n = 0; + s = skipsp(s); + while (*s >= '0' && *s <= '9') + n = (10 * n) + (*s++ - '0'); + if (n > tabstops[i-1]) + tabstops[i++] = n; + s = skipsp(s); + if (*s++ != ',') + break; + } + if (i < 2) + return; + ntabstops = i; + tabdefault = tabstops[ntabstops-1] - tabstops[ntabstops-2]; + break; + case QUERY: + strcpy(msg, "Tab stops "); + if (ntabstops > 2) + { + for (i = 1; i < ntabstops; i++) + { + if (i > 1) + strcat(msg, ","); + sprintf(msg+strlen(msg), "%d", tabstops[i]); + } + sprintf(msg+strlen(msg), " and then "); + } + sprintf(msg+strlen(msg), "every %d spaces", + tabdefault); + p.p_string = msg; + error("%s", &p); + break; + } +} + + +/* + * Handler for the -" option. + */ + public void +opt_quote(type, s) + int type; + register char *s; +{ + char buf[3]; + PARG parg; + + switch (type) + { + case INIT: + case TOGGLE: + if (s[0] == '\0') + { + openquote = closequote = '\0'; + break; + } + if (s[1] != '\0' && s[2] != '\0') + { + error("-\" must be followed by 1 or 2 chars", NULL_PARG); + return; + } + openquote = s[0]; + if (s[1] == '\0') + closequote = openquote; + else + closequote = s[1]; + break; + case QUERY: + buf[0] = openquote; + buf[1] = closequote; + buf[2] = '\0'; + parg.p_string = buf; + error("quotes %s", &parg); + break; + } +} + +/* + * "-?" means display a help message. + * If from the command line, exit immediately. + */ + /*ARGSUSED*/ + public void +opt_query(type, s) + int type; + char *s; +{ + switch (type) + { + case QUERY: + case TOGGLE: + error("Use \"h\" for help", NULL_PARG); + break; + case INIT: + dohelp = 1; + } +} + +/* + * Get the "screen window" size. + */ + public int +get_swindow() +{ + if (swindow > 0) + return (swindow); + return (sc_height + swindow); +} + diff --git a/commands/less/less/option.c b/commands/less/less/option.c new file mode 100644 index 000000000..8fabb48b6 --- /dev/null +++ b/commands/less/less/option.c @@ -0,0 +1,638 @@ +/* $NetBSD: option.c,v 1.8 2006/10/26 01:33:08 mrg Exp $ */ + +/* + * Copyright (C) 1984-2004 Mark Nudelman + * + * You may distribute under the terms of either the GNU General Public + * License or the Less License, as specified in the README file. + * + * For more information about less, or for information on how to + * contact the author, see the README file. + */ + + +/* + * Process command line options. + * + * Each option is a single letter which controls a program variable. + * The options have defaults which may be changed via + * the command line option, toggled via the "-" command, + * or queried via the "_" command. + */ + +#include "less.h" +#include "option.h" + +static struct loption *pendopt; +public int plusoption = FALSE; + +static int flip_triple __P((int, int)); +static char *propt __P((int)); +static void nostring __P((char *)); +static char *optstring __P((char *, char **, char *, char *)); + +extern int screen_trashed; +extern char *every_first_cmd; + +/* + * Scan an argument (either from the command line or from the + * LESS environment variable) and process it. + */ + public void +scan_option(s) + char *s; +{ + register struct loption *o; + register int optc; + char *optname; + char *printopt; + char *str; + int set_default; + int lc; + int err; + PARG parg; + + if (s == NULL) + return; + + /* + * If we have a pending option which requires an argument, + * handle it now. + * This happens if the previous option was, for example, "-P" + * without a following string. In that case, the current + * option is simply the argument for the previous option. + */ + if (pendopt != NULL) + { + switch (pendopt->otype & OTYPE) + { + case STRING: + (*pendopt->ofunc)(INIT, s); + break; + case NUMBER: + printopt = propt(pendopt->oletter); + *(pendopt->ovar) = getnum(&s, printopt, (int*)NULL); + break; + } + pendopt = NULL; + return; + } + + set_default = FALSE; + optname = NULL; + + while (*s != '\0') + { + /* + * Check some special cases first. + */ + switch (optc = *s++) + { + case ' ': + case '\t': + case END_OPTION_STRING: + continue; + case '-': + /* + * "--" indicates an option name instead of a letter. + */ + if (*s == '-') + { + optname = ++s; + break; + } + /* + * "-+" means set these options back to their defaults. + * (They may have been set otherwise by previous + * options.) + */ + set_default = (*s == '+'); + if (set_default) + s++; + continue; + case '+': + /* + * An option prefixed by a "+" is ungotten, so + * that it is interpreted as less commands + * processed at the start of the first input file. + * "++" means process the commands at the start of + * EVERY input file. + */ + plusoption = TRUE; + s = optstring(s, &str, propt('+'), NULL); + if (*str == '+') + every_first_cmd = save(++str); + else + ungetsc(str); + continue; + case '0': case '1': case '2': case '3': case '4': + case '5': case '6': case '7': case '8': case '9': + /* + * Special "more" compatibility form "-" + * instead of -z to set the scrolling + * window size. + */ + s--; + optc = 'z'; + break; + } + + /* + * Not a special case. + * Look up the option letter in the option table. + */ + err = 0; + if (optname == NULL) + { + printopt = propt(optc); + lc = ASCII_IS_LOWER(optc); + o = findopt(optc); + } else + { + printopt = optname; + lc = ASCII_IS_LOWER(optname[0]); + o = findopt_name(&optname, NULL, &err); + s = optname; + optname = NULL; + if (*s == '\0' || *s == ' ') + { + /* + * The option name matches exactly. + */ + ; + } else if (*s == '=') + { + /* + * The option name is followed by "=value". + */ + if (o != NULL && + (o->otype & OTYPE) != STRING && + (o->otype & OTYPE) != NUMBER) + { + parg.p_string = printopt; + error("The %s option should not be followed by =", + &parg); + quit(QUIT_ERROR); + } + s++; + } else + { + /* + * The specified name is longer than the + * real option name. + */ + o = NULL; + } + } + if (o == NULL) + { + parg.p_string = printopt; + if (err == OPT_AMBIG) + error("%s is an ambiguous abbreviation (\"less --help\" for help)", + &parg); + else + error("There is no %s option (\"less --help\" for help)", + &parg); + quit(QUIT_ERROR); + } + + str = NULL; + switch (o->otype & OTYPE) + { + case BOOL: + if (set_default) + *(o->ovar) = o->odefault; + else + *(o->ovar) = ! o->odefault; + break; + case TRIPLE: + if (set_default) + *(o->ovar) = o->odefault; + else + *(o->ovar) = flip_triple(o->odefault, lc); + break; + case STRING: + if (*s == '\0') + { + /* + * Set pendopt and return. + * We will get the string next time + * scan_option is called. + */ + pendopt = o; + return; + } + /* + * Don't do anything here. + * All processing of STRING options is done by + * the handling function. + */ + while (*s == ' ') + s++; + s = optstring(s, &str, printopt, o->odesc[1]); + break; + case NUMBER: + if (*s == '\0') + { + pendopt = o; + return; + } + *(o->ovar) = getnum(&s, printopt, (int*)NULL); + break; + } + /* + * If the option has a handling function, call it. + */ + if (o->ofunc != NULL) + (*o->ofunc)(INIT, str); + } +} + +/* + * Toggle command line flags from within the program. + * Used by the "-" and "_" commands. + * how_toggle may be: + * OPT_NO_TOGGLE just report the current setting, without changing it. + * OPT_TOGGLE invert the current setting + * OPT_UNSET set to the default value + * OPT_SET set to the inverse of the default value + */ + public void +toggle_option(c, s, how_toggle) + int c; + char *s; + int how_toggle; +{ + register struct loption *o; + register int num; + int no_prompt; + int err; + PARG parg; + + no_prompt = (how_toggle & OPT_NO_PROMPT); + how_toggle &= ~OPT_NO_PROMPT; + + /* + * Look up the option letter in the option table. + */ + o = findopt(c); + if (o == NULL) + { + parg.p_string = propt(c); + error("There is no %s option", &parg); + return; + } + + if (how_toggle == OPT_TOGGLE && (o->otype & NO_TOGGLE)) + { + parg.p_string = propt(c); + error("Cannot change the %s option", &parg); + return; + } + + if (how_toggle == OPT_NO_TOGGLE && (o->otype & NO_QUERY)) + { + parg.p_string = propt(c); + error("Cannot query the %s option", &parg); + return; + } + + /* + * Check for something which appears to be a do_toggle + * (because the "-" command was used), but really is not. + * This could be a string option with no string, or + * a number option with no number. + */ + switch (o->otype & OTYPE) + { + case STRING: + case NUMBER: + if (how_toggle == OPT_TOGGLE && *s == '\0') + how_toggle = OPT_NO_TOGGLE; + break; + } + +#if HILITE_SEARCH + if (how_toggle != OPT_NO_TOGGLE && (o->otype & HL_REPAINT)) + repaint_hilite(0); +#endif + + /* + * Now actually toggle (change) the variable. + */ + if (how_toggle != OPT_NO_TOGGLE) + { + switch (o->otype & OTYPE) + { + case BOOL: + /* + * Boolean. + */ + switch (how_toggle) + { + case OPT_TOGGLE: + *(o->ovar) = ! *(o->ovar); + break; + case OPT_UNSET: + *(o->ovar) = o->odefault; + break; + case OPT_SET: + *(o->ovar) = ! o->odefault; + break; + } + break; + case TRIPLE: + /* + * Triple: + * If user gave the lower case letter, then switch + * to 1 unless already 1, in which case make it 0. + * If user gave the upper case letter, then switch + * to 2 unless already 2, in which case make it 0. + */ + switch (how_toggle) + { + case OPT_TOGGLE: + *(o->ovar) = flip_triple(*(o->ovar), + ASCII_IS_LOWER(c)); + break; + case OPT_UNSET: + *(o->ovar) = o->odefault; + break; + case OPT_SET: + *(o->ovar) = flip_triple(o->odefault, + ASCII_IS_LOWER(c)); + break; + } + break; + case STRING: + /* + * String: don't do anything here. + * The handling function will do everything. + */ + switch (how_toggle) + { + case OPT_SET: + case OPT_UNSET: + error("Cannot use \"-+\" or \"--\" for a string option", + NULL_PARG); + return; + } + break; + case NUMBER: + /* + * Number: set the variable to the given number. + */ + switch (how_toggle) + { + case OPT_TOGGLE: + num = getnum(&s, NULL, &err); + if (!err) + *(o->ovar) = num; + break; + case OPT_UNSET: + *(o->ovar) = o->odefault; + break; + case OPT_SET: + error("Can't use \"-!\" for a numeric option", + NULL_PARG); + return; + } + break; + } + } + + /* + * Call the handling function for any special action + * specific to this option. + */ + if (o->ofunc != NULL) + (*o->ofunc)((how_toggle==OPT_NO_TOGGLE) ? QUERY : TOGGLE, s); + +#if HILITE_SEARCH + if (how_toggle != OPT_NO_TOGGLE && (o->otype & HL_REPAINT)) + chg_hilite(); +#endif + + if (!no_prompt) + { + /* + * Print a message describing the new setting. + */ + switch (o->otype & OTYPE) + { + case BOOL: + case TRIPLE: + if (*(o->ovar) < 0) + error("Negative option is invalid", NULL_PARG); + /* + * Print the odesc message. + */ + error(o->odesc[*(o->ovar)], NULL_PARG); + break; + case NUMBER: + /* + * The message is in odesc[1] and has a %d for + * the value of the variable. + */ + parg.p_int = *(o->ovar); + error(o->odesc[1], &parg); + break; + case STRING: + /* + * Message was already printed by the handling function. + */ + break; + } + } + + if (how_toggle != OPT_NO_TOGGLE && (o->otype & REPAINT)) + screen_trashed = TRUE; +} + +/* + * "Toggle" a triple-valued option. + */ + static int +flip_triple(val, lc) + int val; + int lc; +{ + if (lc) + return ((val == OPT_ON) ? OPT_OFF : OPT_ON); + else + return ((val == OPT_ONPLUS) ? OPT_OFF : OPT_ONPLUS); +} + +/* + * Return a string suitable for printing as the "name" of an option. + * For example, if the option letter is 'x', just return "-x". + */ + static char * +propt(c) + int c; +{ + static char buf[8]; + + sprintf(buf, "-%s", prchar(c)); + return (buf); +} + +/* + * Determine if an option is a single character option (BOOL or TRIPLE), + * or if it a multi-character option (NUMBER). + */ + public int +single_char_option(c) + int c; +{ + register struct loption *o; + + o = findopt(c); + if (o == NULL) + return (TRUE); + return ((o->otype & (BOOL|TRIPLE|NOVAR|NO_TOGGLE)) != 0); +} + +/* + * Return the prompt to be used for a given option letter. + * Only string and number valued options have prompts. + */ + public char * +opt_prompt(c) + int c; +{ + register struct loption *o; + + o = findopt(c); + if (o == NULL || (o->otype & (STRING|NUMBER)) == 0) + return (NULL); + return (o->odesc[0]); +} + +/* + * Return whether or not there is a string option pending; + * that is, if the previous option was a string-valued option letter + * (like -P) without a following string. + * In that case, the current option is taken to be the string for + * the previous option. + */ + public int +isoptpending() +{ + return (pendopt != NULL); +} + +/* + * Print error message about missing string. + */ + static void +nostring(printopt) + char *printopt; +{ + PARG parg; + parg.p_string = printopt; + error("Value is required after %s", &parg); +} + +/* + * Print error message if a STRING type option is not followed by a string. + */ + public void +nopendopt() +{ + nostring(propt(pendopt->oletter)); +} + +/* + * Scan to end of string or to an END_OPTION_STRING character. + * In the latter case, replace the char with a null char. + * Return a pointer to the remainder of the string, if any. + */ + static char * +optstring(s, p_str, printopt, validchars) + char *s; + char **p_str; + char *printopt; + char *validchars; +{ + register char *p; + + if (*s == '\0') + { + nostring(printopt); + quit(QUIT_ERROR); + } + *p_str = s; + for (p = s; *p != '\0'; p++) + { + if (*p == END_OPTION_STRING || + (validchars != NULL && strchr(validchars, *p) == NULL)) + { + switch (*p) + { + case END_OPTION_STRING: + case ' ': case '\t': case '-': + /* Replace the char with a null to terminate string. */ + *p++ = '\0'; + break; + default: + /* Cannot replace char; make a copy of the string. */ + *p_str = (char *) ecalloc(p-s+1, sizeof(char)); + strncpy(*p_str, s, p-s); + (*p_str)[p-s] = '\0'; + break; + } + break; + } + } + return (p); +} + +/* + * Translate a string into a number. + * Like atoi(), but takes a pointer to a char *, and updates + * the char * to point after the translated number. + */ + public int +getnum(sp, printopt, errp) + char **sp; + char *printopt; + int *errp; +{ + register char *s; + register int n; + register int neg; + PARG parg; + + s = skipsp(*sp); + neg = FALSE; + if (*s == '-') + { + neg = TRUE; + s++; + } + if (*s < '0' || *s > '9') + { + if (errp != NULL) + { + *errp = TRUE; + return (-1); + } + if (printopt != NULL) + { + parg.p_string = printopt; + error("Number is required after %s", &parg); + } + quit(QUIT_ERROR); + } + + n = 0; + while (*s >= '0' && *s <= '9') + n = 10 * n + *s++ - '0'; + *sp = s; + if (errp != NULL) + *errp = FALSE; + if (neg) + n = -n; + return (n); +} diff --git a/commands/less/less/option.h b/commands/less/less/option.h new file mode 100644 index 000000000..49a99b72e --- /dev/null +++ b/commands/less/less/option.h @@ -0,0 +1,66 @@ +/* $NetBSD: option.h,v 1.7 2006/10/26 01:33:08 mrg Exp $ */ + +/* + * Copyright (C) 1984-2004 Mark Nudelman + * + * You may distribute under the terms of either the GNU General Public + * License or the Less License, as specified in the README file. + * + * For more information about less, or for information on how to + * contact the author, see the README file. + */ + + +#define END_OPTION_STRING ('$') + +/* + * Types of options. + */ +#define BOOL 01 /* Boolean option: 0 or 1 */ +#define TRIPLE 02 /* Triple-valued option: 0, 1 or 2 */ +#define NUMBER 04 /* Numeric option */ +#define STRING 010 /* String-valued option */ +#define NOVAR 020 /* No associated variable */ +#define REPAINT 040 /* Repaint screen after toggling option */ +#define NO_TOGGLE 0100 /* Option cannot be toggled with "-" cmd */ +#define HL_REPAINT 0200 /* Repaint hilites after toggling option */ +#define NO_QUERY 0400 /* Option cannot be queried with "_" cmd */ +#define INIT_HANDLER 01000 /* Call option handler function at startup */ + +#define OTYPE (BOOL|TRIPLE|NUMBER|STRING|NOVAR) + +/* + * Argument to a handling function tells what type of activity: + */ +#define INIT 0 /* Initialization (from command line) */ +#define QUERY 1 /* Query (from _ or - command) */ +#define TOGGLE 2 /* Change value (from - command) */ + +/* Flag to toggle_option to specify how to "toggle" */ +#define OPT_NO_TOGGLE 0 +#define OPT_TOGGLE 1 +#define OPT_UNSET 2 +#define OPT_SET 3 +#define OPT_NO_PROMPT 0100 + +/* Error code from findopt_name */ +#define OPT_AMBIG 1 + +struct optname +{ + char *oname; /* Long (GNU-style) option name */ + struct optname *onext; /* List of synonymous option names */ +}; + +struct loption +{ + char oletter; /* The controlling letter (a-z) */ + struct optname *onames; /* Long (GNU-style) option name */ + int otype; /* Type of the option */ + int odefault; /* Default value */ + int *ovar; /* Pointer to the associated variable */ + void (*ofunc) /* Pointer to special handling function */ + __P((int, char *)); + char *odesc[3]; /* Description of each value */ +}; + diff --git a/commands/less/less/opttbl.c b/commands/less/less/opttbl.c new file mode 100644 index 000000000..675d76b16 --- /dev/null +++ b/commands/less/less/opttbl.c @@ -0,0 +1,592 @@ +/* $NetBSD: opttbl.c,v 1.12 2006/10/26 01:33:08 mrg Exp $ */ + +/* + * Copyright (C) 1984-2004 Mark Nudelman + * + * You may distribute under the terms of either the GNU General Public + * License or the Less License, as specified in the README file. + * + * For more information about less, or for information on how to + * contact the author, see the README file. + */ + + +/* + * The option table. + */ + +#include "less.h" +#include "option.h" + +/* + * Variables controlled by command line options. + */ +public int quiet; /* Should we suppress the audible bell? */ +public int how_search; /* Where should forward searches start? */ +public int top_scroll; /* Repaint screen from top? + (alternative is scroll from bottom) */ +public int pr_type; /* Type of prompt (short, medium, long) */ +public int bs_mode; /* How to process backspaces */ +public int know_dumb; /* Don't complain about dumb terminals */ +public int quit_at_eof; /* Quit after hitting end of file twice */ +public int quit_if_one_screen; /* Quit if EOF on first screen */ +public int be_helpful; /* more(1) style -d */ +public int squeeze; /* Squeeze multiple blank lines into one */ +public int tabstop; /* Tab settings */ +public int back_scroll; /* Repaint screen on backwards movement */ +public int forw_scroll; /* Repaint screen on forward movement */ +public int caseless; /* Do "caseless" searches */ +public int linenums; /* Use line numbers */ +public int autobuf; /* Automatically allocate buffers as needed */ +public int bufspace; /* Max buffer space per file (K) */ +public int ctldisp; /* Send control chars to screen untranslated */ +public int force_open; /* Open the file even if not regular file */ +public int swindow; /* Size of scrolling window */ +public int jump_sline; /* Screen line of "jump target" */ +public int chopline; /* Truncate displayed lines at screen width */ +public int no_init; /* Disable sending ti/te termcap strings */ +public int no_keypad; /* Disable sending ks/ke termcap strings */ +public int twiddle; /* Show tildes after EOF */ +public int show_attn; /* Hilite first unread line */ +public int shift_count; /* Number of positions to shift horizontally */ +public int status_col; /* Display a status column */ +public int use_lessopen; /* Use the LESSOPEN filter */ +public int quit_on_intr; /* Quit on interrupt */ +#if HILITE_SEARCH +public int hilite_search; /* Highlight matched search patterns? */ +#endif + +public int less_is_more = 0; /* Make compatible with POSIX more */ + +/* + * Long option names. + */ +static struct optname a_optname = { "search-skip-screen", NULL }; +static struct optname b_optname = { "buffers", NULL }; +static struct optname B__optname = { "auto-buffers", NULL }; +static struct optname c_optname = { "clear-screen", NULL }; +static struct optname d_optname = { "dumb", NULL }; +#if MSDOS_COMPILER +static struct optname D__optname = { "color", NULL }; +#endif +static struct optname e_optname = { "quit-at-eof", NULL }; +static struct optname f_optname = { "force", NULL }; +static struct optname F__optname = { "quit-if-one-screen", NULL }; +#if HILITE_SEARCH +static struct optname g_optname = { "hilite-search", NULL }; +#endif +static struct optname h_optname = { "max-back-scroll", NULL }; +static struct optname i_optname = { "ignore-case", NULL }; +static struct optname j_optname = { "jump-target", NULL }; +static struct optname J__optname = { "status-column", NULL }; +#if USERFILE +static struct optname k_optname = { "lesskey-file", NULL }; +#endif +static struct optname K__optname = { "quit-on-intr", NULL }; +static struct optname L__optname = { "no-lessopen", NULL }; +static struct optname m_optname = { "long-prompt", NULL }; +static struct optname n_optname = { "line-numbers", NULL }; +#if LOGFILE +static struct optname o_optname = { "log-file", NULL }; +static struct optname O__optname = { "LOG-FILE", NULL }; +#endif +static struct optname p_optname = { "pattern", NULL }; +static struct optname P__optname = { "prompt", NULL }; +static struct optname q2_optname = { "silent", NULL }; +static struct optname q_optname = { "quiet", &q2_optname }; +static struct optname r_optname = { "raw-control-chars", NULL }; +static struct optname s_optname = { "squeeze-blank-lines", NULL }; +static struct optname S__optname = { "chop-long-lines", NULL }; +#if TAGS +static struct optname t_optname = { "tag", NULL }; +static struct optname T__optname = { "tag-file", NULL }; +#endif +static struct optname u_optname = { "underline-special", NULL }; +static struct optname V__optname = { "version", NULL }; +static struct optname w_optname = { "hilite-unread", NULL }; +static struct optname x_optname = { "tabs", NULL }; +static struct optname X__optname = { "no-init", NULL }; +static struct optname y_optname = { "max-forw-scroll", NULL }; +static struct optname z_optname = { "window", NULL }; +static struct optname quote_optname = { "quotes", NULL }; +static struct optname tilde_optname = { "tilde", NULL }; +static struct optname query_optname = { "help", NULL }; +static struct optname pound_optname = { "shift", NULL }; +static struct optname keypad_optname = { "no-keypad", NULL }; + + +/* + * Table of all options and their semantics. + * + * For BOOL and TRIPLE options, odesc[0], odesc[1], odesc[2] are + * the description of the option when set to 0, 1 or 2, respectively. + * For NUMBER options, odesc[0] is the prompt to use when entering + * a new value, and odesc[1] is the description, which should contain + * one %d which is replaced by the value of the number. + * For STRING options, odesc[0] is the prompt to use when entering + * a new value, and odesc[1], if not NULL, is the set of characters + * that are valid in the string. + */ +static struct loption option[] = +{ + { 'a', &a_optname, + BOOL, OPT_OFF, &how_search, NULL, + { + "Search includes displayed screen", + "Search skips displayed screen", + NULL + } + }, + + { 'b', &b_optname, + NUMBER|INIT_HANDLER, 64, &bufspace, opt_b, + { + "Max buffer space per file (K): ", + "Max buffer space per file: %dK", + NULL + } + }, + { 'B', &B__optname, + BOOL, OPT_ON, &autobuf, NULL, + { + "Don't automatically allocate buffers", + "Automatically allocate buffers when needed", + NULL + } + }, + { 'c', &c_optname, + TRIPLE, OPT_OFF, &top_scroll, NULL, + { + "Repaint by scrolling from bottom of screen", + "Repaint by clearing each line", + "Repaint by painting from top of screen" + } + }, +#if 1 + { 'd', &d_optname, + BOOL, OPT_OFF, &be_helpful, NULL, + { "Be less helpful in prompts", + "Be helpful in prompts", + NULL } + }, +#endif + { -1, &d_optname, + BOOL|NO_TOGGLE, OPT_OFF, &know_dumb, NULL, + { + "Assume intelligent terminal", + "Assume dumb terminal", + NULL + } + }, +#if MSDOS_COMPILER + { 'D', &D__optname, + STRING|REPAINT|NO_QUERY, 0, NULL, opt_D, + { + "color desc: ", + "Ddknsu0123456789.", + NULL + } + }, +#endif + { 'e', &e_optname, + TRIPLE, OPT_OFF, &quit_at_eof, NULL, + { + "Don't quit at end-of-file", + "Quit at end-of-file", + "Quit immediately at end-of-file" + } + }, + { 'f', &f_optname, + BOOL, OPT_OFF, &force_open, NULL, + { + "Open only regular files", + "Open even non-regular files", + NULL + } + }, + { 'F', &F__optname, + BOOL, OPT_OFF, &quit_if_one_screen, NULL, + { + "Don't quit if end-of-file on first screen", + "Quit if end-of-file on first screen", + NULL + } + }, +#if HILITE_SEARCH + { 'g', &g_optname, + TRIPLE|HL_REPAINT, OPT_ONPLUS, &hilite_search, NULL, + { + "Don't highlight search matches", + "Highlight matches for previous search only", + "Highlight all matches for previous search pattern", + } + }, +#endif + { 'h', &h_optname, + NUMBER, -1, &back_scroll, NULL, + { + "Backwards scroll limit: ", + "Backwards scroll limit is %d lines", + NULL + } + }, + { 'i', &i_optname, + TRIPLE|HL_REPAINT, OPT_OFF, &caseless, opt_i, + { + "Case is significant in searches", + "Ignore case in searches", + "Ignore case in searches and in patterns" + } + }, + { 'j', &j_optname, + NUMBER, 1, &jump_sline, NULL, + { + "Target line: ", + "Position target at screen line %d", + NULL + } + }, + { 'J', &J__optname, + BOOL|REPAINT, OPT_OFF, &status_col, NULL, + { + "Don't display a status column", + "Display a status column", + NULL + } + }, +#if USERFILE + { 'k', &k_optname, + STRING|NO_TOGGLE|NO_QUERY, 0, NULL, opt_k, + { NULL, NULL, NULL } + }, +#endif + { 'K', &K__optname, + BOOL, OPT_OFF, &quit_on_intr, NULL, + { + "Interrupt (ctrl-C) returns to prompt", + "Interrupt (ctrl-C) exits less", + NULL + } + }, + { 'l', NULL, + STRING|NO_TOGGLE|NO_QUERY, 0, NULL, opt_l, + { NULL, NULL, NULL } + }, + { 'L', &L__optname, + BOOL, OPT_ON, &use_lessopen, NULL, + { + "Don't use the LESSOPEN filter", + "Use the LESSOPEN filter", + NULL + } + }, + { 'm', &m_optname, + TRIPLE, OPT_OFF, &pr_type, NULL, + { + "Short prompt", + "Medium prompt", + "Long prompt" + } + }, + { 'n', &n_optname, + TRIPLE|REPAINT, OPT_ON, &linenums, NULL, + { + "Don't use line numbers", + "Use line numbers", + "Constantly display line numbers" + } + }, +#if LOGFILE + { 'o', &o_optname, + STRING, 0, NULL, opt_o, + { "log file: ", NULL, NULL } + }, + { 'O', &O__optname, + STRING, 0, NULL, opt__O, + { "Log file: ", NULL, NULL } + }, +#endif + { 'p', &p_optname, + STRING|NO_TOGGLE|NO_QUERY, 0, NULL, opt_p, + { NULL, NULL, NULL } + }, + { 'P', &P__optname, + STRING, 0, NULL, opt__P, + { "prompt: ", NULL, NULL } + }, + { 'q', &q_optname, + TRIPLE, OPT_OFF, &quiet, NULL, + { + "Ring the bell for errors AND at eof/bof", + "Ring the bell for errors but not at eof/bof", + "Never ring the bell" + } + }, + { 'r', &r_optname, + TRIPLE|REPAINT, OPT_OFF, &ctldisp, NULL, + { + "Display control characters as ^X", + "Display control characters directly", + "Display control characters directly, processing ANSI sequences" + } + }, + { 's', &s_optname, + BOOL|REPAINT, OPT_OFF, &squeeze, NULL, + { + "Display all blank lines", + "Squeeze multiple blank lines", + NULL + } + }, + { 'S', &S__optname, + BOOL|REPAINT, OPT_OFF, &chopline, NULL, + { + "Fold long lines", + "Chop long lines", + NULL + } + }, +#if TAGS + { 't', &t_optname, + STRING|NO_QUERY, 0, NULL, opt_t, + { "tag: ", NULL, NULL } + }, + { 'T', &T__optname, + STRING, 0, NULL, opt__T, + { "tags file: ", NULL, NULL } + }, +#endif + { 'u', &u_optname, + TRIPLE|REPAINT, OPT_OFF, &bs_mode, NULL, + { + "Display underlined text in underline mode", + "Backspaces cause overstrike", + "Print backspace as ^H" + } + }, + { 'V', &V__optname, + NOVAR, 0, NULL, opt__V, + { NULL, NULL, NULL } + }, + { 'w', &w_optname, + TRIPLE|REPAINT, OPT_OFF, &show_attn, NULL, + { + "Don't highlight first unread line", + "Highlight first unread line after forward-screen", + "Highlight first unread line after any forward movement", + } + }, + { 'x', &x_optname, + STRING|REPAINT, 0, NULL, opt_x, + { + "Tab stops: ", + "0123456789,", + NULL + } + }, + { 'X', &X__optname, + BOOL|NO_TOGGLE, OPT_OFF, &no_init, NULL, + { + "Send init/deinit strings to terminal", + "Don't use init/deinit strings", + NULL + } + }, + { 'y', &y_optname, + NUMBER, -1, &forw_scroll, NULL, + { + "Forward scroll limit: ", + "Forward scroll limit is %d lines", + NULL + } + }, + { 'z', &z_optname, + NUMBER, -1, &swindow, NULL, + { + "Scroll window size: ", + "Scroll window size is %d lines", + NULL + } + }, + { '"', "e_optname, + STRING, 0, NULL, opt_quote, + { "quotes: ", NULL, NULL } + }, + { '~', &tilde_optname, + BOOL|REPAINT, OPT_ON, &twiddle, NULL, + { + "Don't show tildes after end of file", + "Show tildes after end of file", + NULL + } + }, + { '?', &query_optname, + NOVAR, 0, NULL, opt_query, + { NULL, NULL, NULL } + }, + { '#', £_optname, + NUMBER, 0, &shift_count, NULL, + { + "Horizontal shift: ", + "Horizontal shift %d positions", + NULL + } + }, + { '.', &keypad_optname, + BOOL|NO_TOGGLE, OPT_OFF, &no_keypad, NULL, + { + "Use keypad mode", + "Don't use keypad mode", + NULL + } + }, + { '\0', NULL, NOVAR, 0, NULL, NULL, { NULL, NULL, NULL } } +}; + + +/* + * Initialize each option to its default value. + */ + public void +init_option() +{ + register struct loption *o; + char *p; + + p = lgetenv("LESS_IS_MORE"); + if (p != NULL && *p != '\0') + less_is_more = 1; + + for (o = option; o->oletter != '\0'; o++) + { + /* + * Set each variable to its default. + */ + if (o->ovar != NULL) + *(o->ovar) = o->odefault; + if (o->otype & INIT_HANDLER) + (*(o->ofunc))(INIT, (char *) NULL); + } +} + +/* + * Find an option in the option table, given its option letter. + */ + public struct loption * +findopt(c) + int c; +{ + register struct loption *o; + + for (o = option; o->oletter != '\0'; o++) + { + if (o->oletter == c) + return (o); + if ((o->otype & TRIPLE) && ASCII_TO_UPPER(o->oletter) == c) + return (o); + } + return (NULL); +} + +/* + * + */ + static int +is_optchar(c) + char c; +{ + if (ASCII_IS_UPPER(c)) + return 1; + if (ASCII_IS_LOWER(c)) + return 1; + if (c == '-') + return 1; + return 0; +} + +/* + * Find an option in the option table, given its option name. + * p_optname is the (possibly partial) name to look for, and + * is updated to point after the matched name. + * p_oname if non-NULL is set to point to the full option name. + */ + public struct loption * +findopt_name(p_optname, p_oname, p_err) + char **p_optname; + char **p_oname; + int *p_err; +{ + char *optname = *p_optname; + register struct loption *o; + register struct optname *oname; + register int len; + int uppercase; + struct loption *maxo = NULL; + struct optname *maxoname = NULL; + int maxlen = 0; + int ambig = 0; + int exact = 0; + + /* + * Check all options. + */ + for (o = option; o->oletter != '\0'; o++) + { + /* + * Check all names for this option. + */ + for (oname = o->onames; oname != NULL; oname = oname->onext) + { + /* + * Try normal match first (uppercase == 0), + * then, then if it's a TRIPLE option, + * try uppercase match (uppercase == 1). + */ + for (uppercase = 0; uppercase <= 1; uppercase++) + { + len = sprefix(optname, oname->oname, uppercase); + if (len <= 0 || is_optchar(optname[len])) + { + /* + * We didn't use all of the option name. + */ + continue; + } + if (!exact && len == maxlen) + /* + * Already had a partial match, + * and now there's another one that + * matches the same length. + */ + ambig = 1; + else if (len > maxlen) + { + /* + * Found a better match than + * the one we had. + */ + maxo = o; + maxoname = oname; + maxlen = len; + ambig = 0; + exact = (len == (int)strlen(oname->oname)); + } + if (!(o->otype & TRIPLE)) + break; + } + } + } + if (ambig) + { + /* + * Name matched more than one option. + */ + if (p_err != NULL) + *p_err = OPT_AMBIG; + return (NULL); + } + *p_optname = optname + maxlen; + if (p_oname != NULL) + *p_oname = maxoname == NULL ? NULL : maxoname->oname; + return (maxo); +} diff --git a/commands/less/less/os.c b/commands/less/less/os.c new file mode 100644 index 000000000..bb44d793f --- /dev/null +++ b/commands/less/less/os.c @@ -0,0 +1,335 @@ +/* $NetBSD: os.c,v 1.9 2006/10/26 01:33:08 mrg Exp $ */ + +/* + * Copyright (C) 1984-2005 Mark Nudelman + * + * You may distribute under the terms of either the GNU General Public + * License or the Less License, as specified in the README file. + * + * For more information about less, or for information on how to + * contact the author, see the README file. + */ + + +/* + * Operating system dependent routines. + * + * Most of the stuff in here is based on Unix, but an attempt + * has been made to make things work on other operating systems. + * This will sometimes result in a loss of functionality, unless + * someone rewrites code specifically for the new operating system. + * + * The makefile provides defines to decide whether various + * Unix features are present. + */ + +#include "less.h" +#include +#include +#if HAVE_TIME_H +#include +#endif +#if HAVE_ERRNO_H +#include +#endif +#if HAVE_VALUES_H +#include +#endif + +#if HAVE_TIME_T +#define time_type time_t +#else +#define time_type long +#endif + +/* + * BSD setjmp() saves (and longjmp() restores) the signal mask. + * This costs a system call or two per setjmp(), so if possible we clear the + * signal mask with sigsetmask(), and use _setjmp()/_longjmp() instead. + * On other systems, setjmp() doesn't affect the signal mask and so + * _setjmp() does not exist; we just use setjmp(). + */ +#if HAVE__SETJMP && HAVE_SIGSETMASK +#define SET_JUMP _setjmp +#define LONG_JUMP _longjmp +#else +#define SET_JUMP setjmp +#define LONG_JUMP longjmp +#endif + +public int reading; + +static jmp_buf read_label; + +extern int sigs; + +#if !HAVE_STRERROR +static char *strerror __P((int)); +#endif + +/* + * Like read() system call, but is deliberately interruptible. + * A call to intread() from a signal handler will interrupt + * any pending iread(). + */ + public int +iread(fd, buf, len) + int fd; + char *buf; + unsigned int len; +{ + register int n; + +#if MSDOS_COMPILER==WIN32C + if (ABORT_SIGS()) + return (READ_INTR); +#else +#if MSDOS_COMPILER && MSDOS_COMPILER != DJGPPC + if (kbhit()) + { + int c; + + c = getch(); + if (c == '\003') + return (READ_INTR); + ungetch(c); + } +#endif +#endif + if (SET_JUMP(read_label)) + { + /* + * We jumped here from intread. + */ + reading = 0; +#if HAVE_SIGPROCMASK + { + sigset_t mask; + sigemptyset(&mask); + sigprocmask(SIG_SETMASK, &mask, NULL); + } +#else +#if HAVE_SIGSETMASK + sigsetmask(0); +#else +#ifdef _OSK + sigmask(~0); +#endif +#endif +#endif + return (READ_INTR); + } + + flush(); + reading = 1; +#if MSDOS_COMPILER==DJGPPC + if (isatty(fd)) + { + /* + * Don't try reading from a TTY until a character is + * available, because that makes some background programs + * believe DOS is busy in a way that prevents those + * programs from working while "less" waits. + */ + fd_set readfds; + + FD_ZERO(&readfds); + FD_SET(fd, &readfds); + if (select(fd+1, &readfds, 0, 0, 0) == -1) + return (-1); + } +#endif + n = read(fd, buf, len); +#if 1 + /* + * This is a kludge to workaround a problem on some systems + * where terminating a remote tty connection causes read() to + * start returning 0 forever, instead of -1. + */ + { + extern int ignore_eoi; + if (!ignore_eoi) + { + static int consecutive_nulls = 0; + if (n == 0) + consecutive_nulls++; + else + consecutive_nulls = 0; + if (consecutive_nulls > 20) + quit(QUIT_ERROR); + } + } +#endif + reading = 0; + if (n < 0) + return (-1); + return (n); +} + +/* + * Interrupt a pending iread(). + */ + public void +intread() +{ + LONG_JUMP(read_label, 1); +} + +/* + * Return the current time. + */ +#if HAVE_TIME + public long +get_time() +{ + time_type t; + + time(&t); + return (t); +} +#endif + + +#if !HAVE_STRERROR +/* + * Local version of strerror, if not available from the system. + */ + static char * +strerror(err) + int err; +{ +#if HAVE_SYS_ERRLIST + static char buf[16]; + extern char *sys_errlist[]; + extern int sys_nerr; + + if (err < sys_nerr) + return sys_errlist[err]; + sprintf(buf, "Error %d", err); + return buf; +#else + return ("cannot open"); +#endif +} +#endif + +/* + * errno_message: Return an error message based on the value of "errno". + */ + public char * +errno_message(filename) + char *filename; +{ + register const char *p; + register char *m; + int len; +#if HAVE_ERRNO +#if MUST_DEFINE_ERRNO + extern int errno; +#endif + p = strerror(errno); +#else + p = "cannot open"; +#endif + len = strlen(filename) + strlen(p) + 3; + m = (char *) ecalloc(len, sizeof(char)); + SNPRINTF2(m, len, "%s: %s", filename, p); + return (m); +} + +/* + * Return the ratio of two POSITIONS, as a percentage. + * {{ Assumes a POSITION is a long int. }} + */ + public int +percentage(num, den) + POSITION num, den; +{ + POSITION num100 = num * 100; + + if (num100 / 100 == num) + return (num100 / den); + else + return (num / (den / 100)); +} + +/* + * Return the specified percentage of a POSITION. + */ + public POSITION +percent_pos(pos, percent) + POSITION pos; + int percent; +{ + POSITION result100; + + if (percent == 0) + return (0); + else if ((result100 = pos * percent) / percent == pos) + return (result100 / 100); + else + return (percent * (pos / 100)); +} + +#if !HAVE_STRCHR +/* + * strchr is used by regexp.c. + */ + char * +strchr(s, c) + char *s; + int c; +{ + for ( ; *s != '\0'; s++) + if (*s == c) + return (s); + if (c == '\0') + return (s); + return (NULL); +} +#endif + +#if !HAVE_MEMCPY + VOID_POINTER +memcpy(dst, src, len) + VOID_POINTER dst; + VOID_POINTER src; + int len; +{ + char *dstp = (char *) dst; + char *srcp = (char *) src; + int i; + + for (i = 0; i < len; i++) + dstp[i] = srcp[i]; + return (dst); +} +#endif + +#ifdef _OSK_MWC32 + +/* + * This implements an ANSI-style intercept setup for Microware C 3.2 + */ + public int +os9_signal(type, handler) + int type; + RETSIGTYPE (*handler)(); +{ + intercept(handler); +} + +#include + + int +isatty(f) + int f; +{ + struct sgbuf sgbuf; + + if (_gs_opt(f, &sgbuf) < 0) + return -1; + return (sgbuf.sg_class == 0); +} + +#endif diff --git a/commands/less/less/output.c b/commands/less/less/output.c new file mode 100644 index 000000000..fec2a3b69 --- /dev/null +++ b/commands/less/less/output.c @@ -0,0 +1,612 @@ +/* $NetBSD: output.c,v 1.10 2008/02/16 07:20:54 matt Exp $ */ + +/* + * Copyright (C) 1984-2005 Mark Nudelman + * + * You may distribute under the terms of either the GNU General Public + * License or the Less License, as specified in the README file. + * + * For more information about less, or for information on how to + * contact the author, see the README file. + */ + + +/* + * High level routines dealing with the output to the screen. + */ + +#include "less.h" +#if MSDOS_COMPILER==WIN32C +#include "windows.h" +#endif + +public int errmsgs; /* Count of messages displayed by error() */ +public int need_clr; +public int final_attr; + +extern int sigs; +extern int sc_width; +extern int so_s_width, so_e_width; +extern int screen_trashed; +extern int any_display; +extern int is_tty; + +#if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC +extern int ctldisp; +extern int nm_fg_color, nm_bg_color; +extern int bo_fg_color, bo_bg_color; +extern int ul_fg_color, ul_bg_color; +extern int so_fg_color, so_bg_color; +extern int bl_fg_color, bl_bg_color; +#endif + +/* + * Display the line which is in the line buffer. + */ + public void +put_line() +{ + register int c; + register int i; + int a; + + if (ABORT_SIGS()) + { + /* + * Don't output if a signal is pending. + */ + screen_trashed = 1; + return; + } + + final_attr = AT_NORMAL; + + for (i = 0; (c = gline(i, &a)) != '\0'; i++) + { + at_switch(a); + final_attr = a; + if (c == '\b') + putbs(); + else + putchr(c); + } + + at_exit(); +} + +static char obuf[OUTBUF_SIZE]; +static char *ob = obuf; + +/* + * Flush buffered output. + * + * If we haven't displayed any file data yet, + * output messages on error output (file descriptor 2), + * otherwise output on standard output (file descriptor 1). + * + * This has the desirable effect of producing all + * error messages on error output if standard output + * is directed to a file. It also does the same if + * we never produce any real output; for example, if + * the input file(s) cannot be opened. If we do + * eventually produce output, code in edit() makes + * sure these messages can be seen before they are + * overwritten or scrolled away. + */ + public void +flush() +{ + register int n; + register int fd; + + n = ob - obuf; + if (n == 0) + return; +#if MSDOS_COMPILER==WIN32C + if (is_tty && any_display) + { + char *op; + DWORD nwritten = 0; + CONSOLE_SCREEN_BUFFER_INFO scr; + int row; + int col; + int olen; + extern HANDLE con_out; + + olen = ob - obuf; + /* + * There is a bug in Win32 WriteConsole() if we're + * writing in the last cell with a different color. + * To avoid color problems in the bottom line, + * we scroll the screen manually, before writing. + */ + GetConsoleScreenBufferInfo(con_out, &scr); + col = scr.dwCursorPosition.X; + row = scr.dwCursorPosition.Y; + for (op = obuf; op < obuf + olen; op++) + { + if (*op == '\n') + { + col = 0; + row++; + } else if (*op == '\r') + { + col = 0; + } else + { + col++; + if (col >= sc_width) + { + col = 0; + row++; + } + } + } + if (row > scr.srWindow.Bottom) + win32_scroll_up(row - scr.srWindow.Bottom); + WriteConsole(con_out, obuf, olen, &nwritten, NULL); + ob = obuf; + return; + } +#else +#if MSDOS_COMPILER==MSOFTC + if (is_tty && any_display) + { + *ob = '\0'; + _outtext(obuf); + ob = obuf; + return; + } +#else +#if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC + if (is_tty && any_display) + { + *ob = '\0'; + if (ctldisp != OPT_ONPLUS) + cputs(obuf); + else + { + /* + * Look for SGR escape sequences, and convert them + * to color commands. Replace bold, underline, + * and italic escapes into colors specified via + * the -D command-line option. + */ + char *anchor, *p, *p_next; + int buflen = ob - obuf; + unsigned char fg, bg, norm_attr; + /* + * Only dark colors mentioned here, so that + * bold has visible effect. + */ + static enum COLORS screen_color[] = { + BLACK, RED, GREEN, BROWN, + BLUE, MAGENTA, CYAN, LIGHTGRAY + }; + + /* Normal text colors are used as baseline. */ + bg = nm_bg_color & 0xf; + fg = nm_fg_color & 0xf; + norm_attr = (bg << 4) | fg; + for (anchor = p_next = obuf; + (p_next = memchr (p_next, ESC, + buflen - (p_next - obuf))) + != NULL; ) + { + p = p_next; + + /* + * Handle the null escape sequence + * (ESC-[m), which is used to restore + * the original color. + */ + if (p[1] == '[' && is_ansi_end(p[2])) + { + textattr(norm_attr); + p += 3; + anchor = p_next = p; + continue; + } + + if (p[1] == '[') /* "Esc-[" sequence */ + { + /* + * If some chars seen since + * the last escape sequence, + * write it out to the screen + * using current text attributes. + */ + if (p > anchor) + { + *p = '\0'; + cputs (anchor); + *p = ESC; + anchor = p; + } + p += 2; + p_next = p; + while (!is_ansi_end(*p)) + { + char *q; + long code = strtol(p, &q, 10); + + if (!*q) + { + /* + * Incomplete sequence. + * Leave it unprocessed + * in the buffer. + */ + int slop = q - anchor; + strcpy(obuf, anchor); + ob = &obuf[slop]; + return; + } + + if (q == p + || code > 49 || code < 0 + || (!is_ansi_end(*q) + && *q != ';')) + { + p_next = q; + break; + } + if (*q == ';') + q++; + + switch (code) + { + case 1: /* bold on */ + fg = bo_fg_color; + bg = bo_bg_color; + break; + case 3: /* italic on */ + fg = so_fg_color; + bg = so_bg_color; + break; + case 4: /* underline on */ + fg = ul_fg_color; + bg = ul_bg_color; + break; + case 8: /* concealed on */ + fg = (bg & 7) | 8; + break; + case 0: /* all attrs off */ + case 22:/* bold off */ + case 23:/* italic off */ + case 24:/* underline off */ + fg = nm_fg_color; + bg = nm_bg_color; + break; + case 30: case 31: case 32: + case 33: case 34: case 35: + case 36: case 37: + fg = (fg & 8) | (screen_color[code - 30]); + break; + case 39: /* default fg */ + fg = nm_fg_color; + break; + case 40: case 41: case 42: + case 43: case 44: case 45: + case 46: case 47: + bg = (bg & 8) | (screen_color[code - 40]); + break; + case 49: /* default fg */ + bg = nm_bg_color; + break; + } + p = q; + } + if (is_ansi_end(*p) && p > p_next) + { + bg &= 15; + fg &= 15; + textattr ((bg << 4)| fg); + p_next = anchor = p + 1; + } else + break; + } else + p_next++; + } + + /* Output what's left in the buffer. */ + cputs (anchor); + } + ob = obuf; + return; + } +#endif +#endif +#endif + fd = (any_display) ? 1 : 2; + if (write(fd, obuf, n) != n) + screen_trashed = 1; + ob = obuf; +} + +/* + * Output a character. + */ + public int +putchr(c) + int c; +{ +#if 0 /* fake UTF-8 output for testing */ + extern int utf_mode; + if (utf_mode) + { + static char ubuf[MAX_UTF_CHAR_LEN]; + static int ubuf_len = 0; + static int ubuf_index = 0; + if (ubuf_len == 0) + { + ubuf_len = utf_len(c); + ubuf_index = 0; + } + ubuf[ubuf_index++] = c; + if (ubuf_index < ubuf_len) + return c; + c = get_wchar(ubuf) & 0xFF; + ubuf_len = 0; + } +#endif + if (need_clr) + { + need_clr = 0; + clear_bot(); + } +#if MSDOS_COMPILER + if (c == '\n' && is_tty) + { + /* remove_top(1); */ + putchr('\r'); + } +#else +#ifdef _OSK + if (c == '\n' && is_tty) /* In OS-9, '\n' == 0x0D */ + putchr(0x0A); +#endif +#endif + /* + * Some versions of flush() write to *ob, so we must flush + * when we are still one char from the end of obuf. + */ + if (ob >= &obuf[sizeof(obuf)-1]) + flush(); + *ob++ = c; + return (c); +} + +/* + * Output a string. + */ + public void +putstr(s) + register char *s; +{ + while (*s != '\0') + putchr(*s++); +} + + +/* + * Convert an integral type to a string. + */ +#define TYPE_TO_A_FUNC(funcname, type) \ +void funcname(num, buf) \ + type num; \ + char *buf; \ +{ \ + int neg = (num < 0); \ + char tbuf[INT_STRLEN_BOUND(num)+2]; \ + register char *s = tbuf + sizeof(tbuf); \ + if (neg) num = -num; \ + *--s = '\0'; \ + do { \ + *--s = (num % 10) + '0'; \ + } while ((num /= 10) != 0); \ + if (neg) *--s = '-'; \ + strcpy(buf, s); \ +} + +TYPE_TO_A_FUNC(postoa, POSITION) +TYPE_TO_A_FUNC(linenumtoa, LINENUM) +TYPE_TO_A_FUNC(inttoa, int) + +/* + * Output an integer in a given radix. + */ + static int +iprint_int(num) + int num; +{ + char buf[INT_STRLEN_BOUND(num)]; + + inttoa(num, buf); + putstr(buf); + return (strlen(buf)); +} + +/* + * Output a line number in a given radix. + */ + static int +iprint_linenum(num) + LINENUM num; +{ + char buf[INT_STRLEN_BOUND(num)]; + + linenumtoa(num, buf); + putstr(buf); + return (strlen(buf)); +} + +/* + * This function implements printf-like functionality + * using a more portable argument list mechanism than printf's. + */ + static int +less_printf(fmt, parg) + register char *fmt; + PARG *parg; +{ + register constant char *s; + register int col; + + col = 0; + while (*fmt != '\0') + { + if (*fmt != '%') + { + putchr(*fmt++); + col++; + } else + { + ++fmt; + switch (*fmt++) + { + case 's': + s = parg->p_string; + parg++; + while (*s != '\0') + { + putchr(*s++); + col++; + } + break; + case 'd': + col += iprint_int(parg->p_int); + parg++; + break; + case 'n': + col += iprint_linenum(parg->p_linenum); + parg++; + break; + } + } + } + return (col); +} + +/* + * Get a RETURN. + * If some other non-trivial char is pressed, unget it, so it will + * become the next command. + */ + public void +get_return() +{ + int c; + +#if ONLY_RETURN + while ((c = getchr()) != '\n' && c != '\r') + bell(); +#else + c = getchr(); + if (c != '\n' && c != '\r' && c != ' ' && c != READ_INTR) + ungetcc(c); +#endif +} + +/* + * Output a message in the lower left corner of the screen + * and wait for carriage return. + */ + public void +error(fmt, parg) + char *fmt; + PARG *parg; +{ + int col = 0; + static char return_to_continue[] = " (press RETURN)"; + + errmsgs++; + + if (any_display && is_tty) + { + at_exit(); + clear_bot(); + at_enter(AT_STANDOUT); + col += so_s_width; + } + + col += less_printf(fmt, parg); + + if (!(any_display && is_tty)) + { + putchr('\n'); + return; + } + + putstr(return_to_continue); + at_exit(); + col += sizeof(return_to_continue) + so_e_width; + + get_return(); + lower_left(); + + if (col >= sc_width) + /* + * Printing the message has probably scrolled the screen. + * {{ Unless the terminal doesn't have auto margins, + * in which case we just hammered on the right margin. }} + */ + screen_trashed = 1; + + flush(); +} + +static char intr_to_abort[] = "... (interrupt to abort)"; + +/* + * Output a message in the lower left corner of the screen + * and don't wait for carriage return. + * Usually used to warn that we are beginning a potentially + * time-consuming operation. + */ + public void +ierror(fmt, parg) + char *fmt; + PARG *parg; +{ + at_exit(); + clear_bot(); + at_enter(AT_STANDOUT); + (void) less_printf(fmt, parg); + putstr(intr_to_abort); + at_exit(); + flush(); + need_clr = 1; +} + +/* + * Output a message in the lower left corner of the screen + * and return a single-character response. + */ + public int +query(fmt, parg) + char *fmt; + PARG *parg; +{ + register int c; + int col = 0; + + if (any_display && is_tty) + clear_bot(); + + (void) less_printf(fmt, parg); + c = getchr(); + + if (!(any_display && is_tty)) + { + putchr('\n'); + return (c); + } + + lower_left(); + if (col >= sc_width) + screen_trashed = 1; + flush(); + + return (c); +} diff --git a/commands/less/less/pckeys.h b/commands/less/less/pckeys.h new file mode 100644 index 000000000..2425226e3 --- /dev/null +++ b/commands/less/less/pckeys.h @@ -0,0 +1,34 @@ +/* + * Copyright (C) 1984-2004 Mark Nudelman + * + * You may distribute under the terms of either the GNU General Public + * License or the Less License, as specified in the README file. + * + * For more information about less, or for information on how to + * contact the author, see the README file. + */ + + +/* + * Definitions of keys on the PC. + * Special (non-ASCII) keys on the PC send a two-byte sequence, + * where the first byte is 0 and the second is as defined below. + */ +#define PCK_SHIFT_TAB '\017' +#define PCK_ALT_E '\022' +#define PCK_CAPS_LOCK '\072' +#define PCK_F1 '\073' +#define PCK_NUM_LOCK '\105' +#define PCK_HOME '\107' +#define PCK_UP '\110' +#define PCK_PAGEUP '\111' +#define PCK_LEFT '\113' +#define PCK_RIGHT '\115' +#define PCK_END '\117' +#define PCK_DOWN '\120' +#define PCK_PAGEDOWN '\121' +#define PCK_INSERT '\122' +#define PCK_DELETE '\123' +#define PCK_CTL_LEFT '\163' +#define PCK_CTL_RIGHT '\164' +#define PCK_CTL_DELETE '\223' diff --git a/commands/less/less/position.c b/commands/less/less/position.c new file mode 100644 index 000000000..319f9d895 --- /dev/null +++ b/commands/less/less/position.c @@ -0,0 +1,233 @@ +/* + * Copyright (C) 1984-2004 Mark Nudelman + * + * You may distribute under the terms of either the GNU General Public + * License or the Less License, as specified in the README file. + * + * For more information about less, or for information on how to + * contact the author, see the README file. + */ + + +/* + * Routines dealing with the "position" table. + * This is a table which tells the position (in the input file) of the + * first char on each currently displayed line. + * + * {{ The position table is scrolled by moving all the entries. + * Would be better to have a circular table + * and just change a couple of pointers. }} + */ + +#include "less.h" +#include "position.h" + +static POSITION *table = NULL; /* The position table */ +static int table_size; + +extern int sc_width, sc_height; + +/* + * Return the starting file position of a line displayed on the screen. + * The line may be specified as a line number relative to the top + * of the screen, but is usually one of these special cases: + * the top (first) line on the screen + * the second line on the screen + * the bottom line on the screen + * the line after the bottom line on the screen + */ + public POSITION +position(where) + int where; +{ + switch (where) + { + case BOTTOM: + where = sc_height - 2; + break; + case BOTTOM_PLUS_ONE: + where = sc_height - 1; + break; + case MIDDLE: + where = (sc_height - 1) / 2; + } + return (table[where]); +} + +/* + * Add a new file position to the bottom of the position table. + */ + public void +add_forw_pos(pos) + POSITION pos; +{ + register int i; + + /* + * Scroll the position table up. + */ + for (i = 1; i < sc_height; i++) + table[i-1] = table[i]; + table[sc_height - 1] = pos; +} + +/* + * Add a new file position to the top of the position table. + */ + public void +add_back_pos(pos) + POSITION pos; +{ + register int i; + + /* + * Scroll the position table down. + */ + for (i = sc_height - 1; i > 0; i--) + table[i] = table[i-1]; + table[0] = pos; +} + +/* + * Initialize the position table, done whenever we clear the screen. + */ + public void +pos_clear() +{ + register int i; + + for (i = 0; i < sc_height; i++) + table[i] = NULL_POSITION; +} + +/* + * Allocate or reallocate the position table. + */ + public void +pos_init() +{ + struct scrpos scrpos; + scrpos.pos = scrpos.ln = 0; /* XXX: GCC */ + + if (sc_height <= table_size) + return; + /* + * If we already have a table, remember the first line in it + * before we free it, so we can copy that line to the new table. + */ + if (table != NULL) + { + get_scrpos(&scrpos); + free((char*)table); + } else + scrpos.pos = NULL_POSITION; + table = (POSITION *) ecalloc(sc_height, sizeof(POSITION)); + table_size = sc_height; + pos_clear(); + if (scrpos.pos != NULL_POSITION) + table[scrpos.ln-1] = scrpos.pos; +} + +/* + * See if the byte at a specified position is currently on the screen. + * Check the position table to see if the position falls within its range. + * Return the position table entry if found, -1 if not. + */ + public int +onscreen(pos) + POSITION pos; +{ + register int i; + + if (pos < table[0]) + return (-1); + for (i = 1; i < sc_height; i++) + if (pos < table[i]) + return (i-1); + return (-1); +} + +/* + * See if the entire screen is empty. + */ + public int +empty_screen() +{ + return (empty_lines(0, sc_height-1)); +} + + public int +empty_lines(s, e) + int s; + int e; +{ + register int i; + + for (i = s; i <= e; i++) + if (table[i] != NULL_POSITION) + return (0); + return (1); +} + +/* + * Get the current screen position. + * The screen position consists of both a file position and + * a screen line number where the file position is placed on the screen. + * Normally the screen line number is 0, but if we are positioned + * such that the top few lines are empty, we may have to set + * the screen line to a number > 0. + */ + public void +get_scrpos(scrpos) + struct scrpos *scrpos; +{ + register int i; + + /* + * Find the first line on the screen which has something on it, + * and return the screen line number and the file position. + */ + for (i = 0; i < sc_height; i++) + if (table[i] != NULL_POSITION) + { + scrpos->ln = i+1; + scrpos->pos = table[i]; + return; + } + /* + * The screen is empty. + */ + scrpos->pos = NULL_POSITION; +} + +/* + * Adjust a screen line number to be a simple positive integer + * in the range { 0 .. sc_height-2 }. + * (The bottom line, sc_height-1, is reserved for prompts, etc.) + * The given "sline" may be in the range { 1 .. sc_height-1 } + * to refer to lines relative to the top of the screen (starting from 1), + * or it may be in { -1 .. -(sc_height-1) } to refer to lines + * relative to the bottom of the screen. + */ + public int +adjsline(sline) + int sline; +{ + /* + * Negative screen line number means + * relative to the bottom of the screen. + */ + if (sline < 0) + sline += sc_height; + /* + * Can't be less than 1 or greater than sc_height-1. + */ + if (sline <= 0) + sline = 1; + if (sline >= sc_height) + sline = sc_height - 1; + /* + * Return zero-based line number, not one-based. + */ + return (sline-1); +} diff --git a/commands/less/less/position.h b/commands/less/less/position.h new file mode 100644 index 000000000..125dae536 --- /dev/null +++ b/commands/less/less/position.h @@ -0,0 +1,19 @@ +/* + * Copyright (C) 1984-2004 Mark Nudelman + * + * You may distribute under the terms of either the GNU General Public + * License or the Less License, as specified in the README file. + * + * For more information about less, or for information on how to + * contact the author, see the README file. + */ + + +/* + * Include file for interfacing to position.c modules. + */ +#define TOP (0) +#define TOP_PLUS_ONE (1) +#define BOTTOM (-1) +#define BOTTOM_PLUS_ONE (-2) +#define MIDDLE (-3) diff --git a/commands/less/less/prompt.c b/commands/less/less/prompt.c new file mode 100644 index 000000000..9c59e332b --- /dev/null +++ b/commands/less/less/prompt.c @@ -0,0 +1,593 @@ +/* $NetBSD: prompt.c,v 1.13 2008/02/16 07:20:54 matt Exp $ */ + +/* + * Copyright (C) 1984-2004 Mark Nudelman + * + * You may distribute under the terms of either the GNU General Public + * License or the Less License, as specified in the README file. + * + * For more information about less, or for information on how to + * contact the author, see the README file. + */ + + +/* + * Prompting and other messages. + * There are three flavors of prompts, SHORT, MEDIUM and LONG, + * selected by the -m/-M options. + * There is also the "equals message", printed by the = command. + * A prompt is a message composed of various pieces, such as the + * name of the file being viewed, the percentage into the file, etc. + */ + +#include "less.h" +#include "position.h" + +extern int pr_type; +extern int hit_eof; +extern int new_file; +extern int sc_width; +extern int so_s_width, so_e_width; +extern int linenums; +extern int hshift; +extern int sc_height; +extern int jump_sline; +extern IFILE curr_ifile; +#if EDITOR +extern char *editor; +extern char *editproto; +#endif + +/* + * Prototypes for the three flavors of prompts. + * These strings are expanded by pr_expand(). + */ +static constant char s_proto[] = + "?n?f%f .?m(%T %i of %m) ..?e(END) ?x- Next\\: %x..%t"; +static constant char m_proto[] = + "?n?f%f .?m(%T %i of %m) ..?e(END) ?x- Next\\: %x.:?pB%pB\\%:byte %bB?s/%s...%t"; +static constant char M_proto[] = + "?f%f .?n?m(%T %i of %m) ..?ltlines %lt-%lb?L/%L. :byte %bB?s/%s. .?e(END) ?x- Next\\: %x.:?pB%pB\\%..%t"; +static constant char e_proto[] = + "?f%f .?m(%T %i of %m) .?ltlines %lt-%lb?L/%L. .byte %bB?s/%s. ?e(END) :?pB%pB\\%..%t"; +static constant char h_proto[] = + "HELP -- ?eEND -- Press g to see it again:Press RETURN for more., or q when done"; +static constant char w_proto[] = + "Waiting for data"; + +public char constant *prproto[3]; +public char constant *eqproto = e_proto; +public char constant *hproto = h_proto; +public char constant *wproto = w_proto; + +static char message[PROMPT_SIZE]; +static char *mp; + +static void ap_pos __P((POSITION)); +static void ap_int __P((int)); +static void ap_str __P((char *)); +static void ap_char __P((int)); +static void ap_quest __P((void)); +static POSITION curr_byte __P((int)); +static int cond __P((int, int)); +static void protochar __P((int, int, int)); +static char *skipcond __P((char *)); +static char *wherechar __P((char *, int *)); + +/* + * Initialize the prompt prototype strings. + */ + public void +init_prompt() +{ + prproto[0] = save(s_proto); + prproto[1] = save(m_proto); + prproto[2] = save(M_proto); + eqproto = save(e_proto); + hproto = save(h_proto); + wproto = save(w_proto); +} + +/* + * Append a string to the end of the message. + */ + static void +ap_str(s) + char *s; +{ + int len; + + len = strlen(s); + if (mp + len >= message + PROMPT_SIZE) + len = message + PROMPT_SIZE - mp - 1; + strncpy(mp, s, len); + mp += len; + *mp = '\0'; +} + +/* + * Append a character to the end of the message. + */ + static void +ap_char(i) + int i; +{ + char buf[2]; + char c = (char)i; + + buf[0] = c; + buf[1] = '\0'; + ap_str(buf); +} + +/* + * Append a POSITION (as a decimal integer) to the end of the message. + */ + static void +ap_pos(pos) + POSITION pos; +{ + char buf[INT_STRLEN_BOUND(pos) + 2]; + + postoa(pos, buf); + ap_str(buf); +} + +/* + * Append a line number to the end of the message. + */ + static void +ap_linenum(linenum) + LINENUM linenum; +{ + char buf[INT_STRLEN_BOUND(linenum) + 2]; + + linenumtoa(linenum, buf); + ap_str(buf); +} + +/* + * Append an integer to the end of the message. + */ + static void +ap_int(num) + int num; +{ + char buf[INT_STRLEN_BOUND(num) + 2]; + + inttoa(num, buf); + ap_str(buf); +} + +/* + * Append a question mark to the end of the message. + */ + static void +ap_quest() +{ + ap_str("?"); +} + +/* + * Return the "current" byte offset in the file. + */ + static POSITION +curr_byte(where) + int where; +{ + POSITION pos; + + pos = position(where); + while (pos == NULL_POSITION && where >= 0 && where < sc_height-1) + pos = position(++where); + if (pos == NULL_POSITION) + pos = ch_length(); + return (pos); +} + +/* + * Return the value of a prototype conditional. + * A prototype string may include conditionals which consist of a + * question mark followed by a single letter. + * Here we decode that letter and return the appropriate boolean value. + */ + static int +cond(c, where) + char c; + int where; +{ + POSITION len; + + switch (c) + { + case 'a': /* Anything in the message yet? */ + return (mp > message); + case 'b': /* Current byte offset known? */ + return (curr_byte(where) != NULL_POSITION); + case 'c': + return (hshift != 0); + case 'e': /* At end of file? */ + return (hit_eof); + case 'f': /* Filename known? */ + return (strcmp(get_filename(curr_ifile), "-") != 0); + case 'l': /* Line number known? */ + case 'd': /* Same as l */ + return (linenums); + case 'L': /* Final line number known? */ + case 'D': /* Final page number known? */ + return (linenums && ch_length() != NULL_POSITION); + case 'm': /* More than one file? */ +#if TAGS + return (ntags() ? (ntags() > 1) : (nifile() > 1)); +#else + return (nifile() > 1); +#endif + case 'n': /* First prompt in a new file? */ +#if TAGS + return (ntags() ? 1 : new_file); +#else + return (new_file); +#endif + case 'p': /* Percent into file (bytes) known? */ + return (curr_byte(where) != NULL_POSITION && + ch_length() > 0); + case 'P': /* Percent into file (lines) known? */ + return (currline(where) != 0 && + (len = ch_length()) > 0 && + find_linenum(len) != 0); + case 's': /* Size of file known? */ + case 'B': + return (ch_length() != NULL_POSITION); + case 'x': /* Is there a "next" file? */ +#if TAGS + if (ntags()) + return (0); +#endif + return (next_ifile(curr_ifile) != NULL_IFILE); + } + return (0); +} + +/* + * Decode a "percent" prototype character. + * A prototype string may include various "percent" escapes; + * that is, a percent sign followed by a single letter. + * Here we decode that letter and take the appropriate action, + * usually by appending something to the message being built. + */ + static void +protochar(c, where, iseditproto) + int c; + int where; + int iseditproto; +{ + POSITION pos; + POSITION len; + int n; + LINENUM linenum; + LINENUM last_linenum; + IFILE h; + +#undef PAGE_NUM +#define PAGE_NUM(linenum) ((((linenum) - 1) / (sc_height - 1)) + 1) + + switch (c) + { + case 'b': /* Current byte offset */ + pos = curr_byte(where); + if (pos != NULL_POSITION) + ap_pos(pos); + else + ap_quest(); + break; + case 'c': + ap_int(hshift); + break; + case 'd': /* Current page number */ + linenum = currline(where); + if (linenum > 0 && sc_height > 1) + ap_linenum(PAGE_NUM(linenum)); + else + ap_quest(); + break; + case 'D': /* Final page number */ + /* Find the page number of the last byte in the file (len-1). */ + len = ch_length(); + if (len == NULL_POSITION) + ap_quest(); + else if (len == 0) + /* An empty file has no pages. */ + ap_linenum(0); + else + { + linenum = find_linenum(len - 1); + if (linenum <= 0) + ap_quest(); + else + ap_linenum(PAGE_NUM(linenum)); + } + break; +#if EDITOR + case 'E': /* Editor name */ + ap_str(editor); + break; +#endif + case 'f': /* File name */ + ap_str(get_filename(curr_ifile)); + break; + case 'i': /* Index into list of files */ +#if TAGS + if (ntags()) + ap_int(curr_tag()); + else +#endif + ap_int(get_index(curr_ifile)); + break; + case 'l': /* Current line number */ + linenum = currline(where); + if (linenum != 0) + ap_linenum(linenum); + else + ap_quest(); + break; + case 'L': /* Final line number */ + len = ch_length(); + if (len == NULL_POSITION || len == ch_zero() || + (linenum = find_linenum(len)) <= 0) + ap_quest(); + else + ap_linenum(linenum-1); + break; + case 'm': /* Number of files */ +#if TAGS + n = ntags(); + if (n) + ap_int(n); + else +#endif + ap_int(nifile()); + break; + case 'p': /* Percent into file (bytes) */ + pos = curr_byte(where); + len = ch_length(); + if (pos != NULL_POSITION && len > 0) + ap_int(percentage(pos,len)); + else + ap_quest(); + break; + case 'P': /* Percent into file (lines) */ + linenum = currline(where); + if (linenum == 0 || + (len = ch_length()) == NULL_POSITION || len == ch_zero() || + (last_linenum = find_linenum(len)) <= 0) + ap_quest(); + else + ap_int(percentage(linenum, last_linenum)); + break; + case 's': /* Size of file */ + case 'B': + len = ch_length(); + if (len != NULL_POSITION) + ap_pos(len); + else + ap_quest(); + break; + case 't': /* Truncate trailing spaces in the message */ + while (mp > message && mp[-1] == ' ') + mp--; + break; + case 'T': /* Type of list */ +#if TAGS + if (ntags()) + ap_str("tag"); + else +#endif + ap_str("file"); + break; + case 'x': /* Name of next file */ + h = next_ifile(curr_ifile); + if (h != NULL_IFILE) + ap_str(get_filename(h)); + else + ap_quest(); + break; + } +} + +/* + * Skip a false conditional. + * When a false condition is found (either a false IF or the ELSE part + * of a true IF), this routine scans the prototype string to decide + * where to resume parsing the string. + * We must keep track of nested IFs and skip them properly. + */ + static char * +skipcond(p) + register char *p; +{ + register int iflevel; + + /* + * We came in here after processing a ? or :, + * so we start nested one level deep. + */ + iflevel = 1; + + for (;;) switch (*++p) + { + case '?': + /* + * Start of a nested IF. + */ + iflevel++; + break; + case ':': + /* + * Else. + * If this matches the IF we came in here with, + * then we're done. + */ + if (iflevel == 1) + return (p); + break; + case '.': + /* + * Endif. + * If this matches the IF we came in here with, + * then we're done. + */ + if (--iflevel == 0) + return (p); + break; + case '\\': + /* + * Backslash escapes the next character. + */ + ++p; + break; + case '\0': + /* + * Whoops. Hit end of string. + * This is a malformed conditional, but just treat it + * as if all active conditionals ends here. + */ + return (p-1); + } + /*NOTREACHED*/ +} + +/* + * Decode a char that represents a position on the screen. + */ + static char * +wherechar(p, wp) + char *p; + int *wp; +{ + switch (*p) + { + case 'b': case 'd': case 'l': case 'p': case 'P': + switch (*++p) + { + case 't': *wp = TOP; break; + case 'm': *wp = MIDDLE; break; + case 'b': *wp = BOTTOM; break; + case 'B': *wp = BOTTOM_PLUS_ONE; break; + case 'j': *wp = adjsline(jump_sline); break; + default: *wp = TOP; p--; break; + } + } + return (p); +} + +/* + * Construct a message based on a prototype string. + */ + public char * +pr_expand(proto, maxwidth) + char *proto; + int maxwidth; +{ + register char *p; + register int c; + int where; + + mp = message; + + if (*proto == '\0') + return (""); + + for (p = proto; *p != '\0'; p++) + { + switch (*p) + { + default: /* Just put the character in the message */ + ap_char(*p); + break; + case '\\': /* Backslash escapes the next character */ + p++; + ap_char(*p); + break; + case '?': /* Conditional (IF) */ + if ((c = *++p) == '\0') + --p; + else + { + where = 0; + p = wherechar(p, &where); + if (!cond(c, where)) + p = skipcond(p); + } + break; + case ':': /* ELSE */ + p = skipcond(p); + break; + case '.': /* ENDIF */ + break; + case '%': /* Percent escape */ + if ((c = *++p) == '\0') + --p; + else + { + where = 0; + p = wherechar(p, &where); + protochar(c, where, +#if EDITOR + (proto == editproto)); +#else + 0); +#endif + + } + break; + } + } + + if (mp == message) + return (""); + if (maxwidth > 0 && mp >= message + maxwidth) + { + /* + * Message is too long. + * Return just the final portion of it. + */ + return (mp - maxwidth); + } + return (message); +} + +/* + * Return a message suitable for printing by the "=" command. + */ + public char * +eq_message() +{ + return (pr_expand(eqproto, 0)); +} + +/* + * Return a prompt. + * This depends on the prompt type (SHORT, MEDIUM, LONG), etc. + * If we can't come up with an appropriate prompt, return NULL + * and the caller will prompt with a colon. + */ + public char * +pr_string() +{ + char *prompt; + + prompt = pr_expand((ch_getflags() & CH_HELPFILE) ? + hproto : prproto[pr_type], + sc_width-so_s_width-so_e_width-2); + new_file = 0; + return (prompt); +} + +/* + * Return a message suitable for printing while waiting in the F command. + */ + public char * +wait_message() +{ + return (pr_expand(wproto, sc_width-so_s_width-so_e_width-2)); +} diff --git a/commands/less/less/screen.c b/commands/less/less/screen.c new file mode 100644 index 000000000..84d513b70 --- /dev/null +++ b/commands/less/less/screen.c @@ -0,0 +1,2424 @@ +/* $NetBSD: screen.c,v 1.15 2006/10/26 01:33:08 mrg Exp $ */ + +/* + * Copyright (C) 1984-2005 Mark Nudelman + * + * You may distribute under the terms of either the GNU General Public + * License or the Less License, as specified in the README file. + * + * For more information about less, or for information on how to + * contact the author, see the README file. + */ + + +/* + * Routines which deal with the characteristics of the terminal. + * Uses termcap to be as terminal-independent as possible. + */ + +#include "less.h" +#include "cmd.h" + +#if MSDOS_COMPILER +#include "pckeys.h" +#if MSDOS_COMPILER==MSOFTC +#include +#else +#if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC +#include +#if MSDOS_COMPILER==DJGPPC +#include +extern int fd0; +#endif +#else +#if MSDOS_COMPILER==WIN32C +#include +#endif +#endif +#endif +#include + +#else + +#if HAVE_SYS_IOCTL_H +#include +#endif + +#if HAVE_TERMIOS_H && HAVE_TERMIOS_FUNCS +#include +#else +#if HAVE_TERMIO_H +#include +#else +#if HAVE_SGSTAT_H +#include +#else +#include +#endif +#endif +#endif + +#if HAVE_TERMCAP_H +#include +#endif +#ifdef _OSK +#include +#endif +#if OS2 +#include +#include "pckeys.h" +#endif +#if HAVE_SYS_STREAM_H +#include +#endif +#if HAVE_SYS_PTEM_H +#include +#endif + +#endif /* MSDOS_COMPILER */ + +/* + * Check for broken termios package that forces you to manually + * set the line discipline. + */ +#ifdef __ultrix__ +#define MUST_SET_LINE_DISCIPLINE 1 +#else +#define MUST_SET_LINE_DISCIPLINE 0 +#endif + +#if OS2 +#define DEFAULT_TERM "ansi" +static char *windowid; +#else +#define DEFAULT_TERM "unknown" +#endif + +#if MSDOS_COMPILER==MSOFTC +static int videopages; +static long msec_loops; +static int flash_created = 0; +#define SETCOLORS(fg,bg) { _settextcolor(fg); _setbkcolor(bg); } +#endif + +#if MSDOS_COMPILER==BORLANDC +static unsigned short *whitescreen; +static int flash_created = 0; +#endif +#if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC +#define _settextposition(y,x) gotoxy(x,y) +#define _clearscreen(m) clrscr() +#define _outtext(s) cputs(s) +#define SETCOLORS(fg,bg) { textcolor(fg); textbackground(bg); } +extern int sc_height; +#endif + +#if MSDOS_COMPILER==WIN32C +struct keyRecord +{ + int ascii; + int scan; +} currentKey; + +static int keyCount = 0; +static WORD curr_attr; +static int pending_scancode = 0; +static WORD *whitescreen; + +static HANDLE con_out_save = INVALID_HANDLE_VALUE; /* previous console */ +static HANDLE con_out_ours = INVALID_HANDLE_VALUE; /* our own */ +HANDLE con_out = INVALID_HANDLE_VALUE; /* current console */ + +extern int quitting; +static void win32_init_term(); +static void win32_deinit_term(); + +#define FG_COLORS (FOREGROUND_RED | FOREGROUND_GREEN | FOREGROUND_BLUE | FOREGROUND_INTENSITY) +#define BG_COLORS (BACKGROUND_RED | BACKGROUND_GREEN | BACKGROUND_BLUE | BACKGROUND_INTENSITY) +#define MAKEATTR(fg,bg) ((WORD)((fg)|((bg)<<4))) +#define SETCOLORS(fg,bg) { curr_attr = MAKEATTR(fg,bg); \ + if (SetConsoleTextAttribute(con_out, curr_attr) == 0) \ + error("SETCOLORS failed"); } +#endif + +#if MSDOS_COMPILER +public int nm_fg_color; /* Color of normal text */ +public int nm_bg_color; +public int bo_fg_color; /* Color of bold text */ +public int bo_bg_color; +public int ul_fg_color; /* Color of underlined text */ +public int ul_bg_color; +public int so_fg_color; /* Color of standout text */ +public int so_bg_color; +public int bl_fg_color; /* Color of blinking text */ +public int bl_bg_color; +static int sy_fg_color; /* Color of system text (before less) */ +static int sy_bg_color; + +#else + +/* + * Strings passed to tputs() to do various terminal functions. + */ +static char + *sc_pad, /* Pad string */ + *sc_home, /* Cursor home */ + *sc_addline, /* Add line, scroll down following lines */ + *sc_lower_left, /* Cursor to last line, first column */ + *sc_move, /* General cursor positioning */ + *sc_clear, /* Clear screen */ + *sc_eol_clear, /* Clear to end of line */ + *sc_eos_clear, /* Clear to end of screen */ + *sc_s_in, /* Enter standout (highlighted) mode */ + *sc_s_out, /* Exit standout mode */ + *sc_u_in, /* Enter underline mode */ + *sc_u_out, /* Exit underline mode */ + *sc_b_in, /* Enter bold mode */ + *sc_b_out, /* Exit bold mode */ + *sc_bl_in, /* Enter blink mode */ + *sc_bl_out, /* Exit blink mode */ + *sc_visual_bell, /* Visual bell (flash screen) sequence */ + *sc_backspace, /* Backspace cursor */ + *sc_s_keypad, /* Start keypad mode */ + *sc_e_keypad, /* End keypad mode */ + *sc_init, /* Startup terminal initialization */ + *sc_deinit; /* Exit terminal de-initialization */ +#endif + +static int init_done = 0; + +public int auto_wrap; /* Terminal does \r\n when write past margin */ +public int ignaw; /* Terminal ignores \n immediately after wrap */ +public int erase_char; /* The user's erase char */ +public int erase2_char; /* The user's other erase char */ +public int kill_char; /* The user's line-kill char */ +public int werase_char; /* The user's word-erase char */ +public int sc_width, sc_height; /* Height & width of screen */ +public int bo_s_width, bo_e_width; /* Printing width of boldface seq */ +public int ul_s_width, ul_e_width; /* Printing width of underline seq */ +public int so_s_width, so_e_width; /* Printing width of standout seq */ +public int bl_s_width, bl_e_width; /* Printing width of blink seq */ +public int above_mem, below_mem; /* Memory retained above/below screen */ +public int can_goto_line; /* Can move cursor to any line */ +public int clear_bg; /* Clear fills with background color */ +public int missing_cap = 0; /* Some capability is missing */ + +static int attrmode = AT_NORMAL; +extern int binattr; + +#if !MSDOS_COMPILER +static char *cheaper(); +static void tmodes(); +#endif + +/* + * These two variables are sometimes defined in, + * and needed by, the termcap library. + */ +#if MUST_DEFINE_OSPEED +extern short ospeed; /* Terminal output baud rate */ +extern char PC; /* Pad character */ +#endif +#ifdef _OSK +short ospeed; +char PC_, *UP, *BC; +#endif + +extern int quiet; /* If VERY_QUIET, use visual bell for bell */ +extern int no_back_scroll; +extern int swindow; +extern int no_init; +extern int quit_at_eof; +extern int more_mode; +extern int no_keypad; +extern int sigs; +extern int wscroll; +extern int screen_trashed; +extern int tty; +extern int top_scroll; +#if HILITE_SEARCH +extern int hilite_search; +#endif + +#ifndef HAVE_TERMCAP_H +extern char *tgetstr(); +extern char *tgoto(); +#endif + + +/* + * Change terminal to "raw mode", or restore to "normal" mode. + * "Raw mode" means + * 1. An outstanding read will complete on receipt of a single keystroke. + * 2. Input is not echoed. + * 3. On output, \n is mapped to \r\n. + * 4. \t is NOT expanded into spaces. + * 5. Signal-causing characters such as ctrl-C (interrupt), + * etc. are NOT disabled. + * It doesn't matter whether an input \n is mapped to \r, or vice versa. + */ + public void +raw_mode(on) + int on; +{ + static int curr_on = 0; + + if (on == curr_on) + return; + erase2_char = '\b'; /* in case OS doesn't know about erase2 */ +#if HAVE_TERMIOS_H && HAVE_TERMIOS_FUNCS + { + struct termios s; + static struct termios save_term; + static int saved_term = 0; + + if (on) + { + /* + * Get terminal modes. + */ + tcgetattr(tty, &s); + + /* + * Save modes and set certain variables dependent on modes. + */ + if (!saved_term) + { + save_term = s; + saved_term = 1; + } +#if HAVE_OSPEED + switch (cfgetospeed(&s)) + { +#ifdef B0 + case B0: ospeed = 0; break; +#endif +#ifdef B50 + case B50: ospeed = 1; break; +#endif +#ifdef B75 + case B75: ospeed = 2; break; +#endif +#ifdef B110 + case B110: ospeed = 3; break; +#endif +#ifdef B134 + case B134: ospeed = 4; break; +#endif +#ifdef B150 + case B150: ospeed = 5; break; +#endif +#ifdef B200 + case B200: ospeed = 6; break; +#endif +#ifdef B300 + case B300: ospeed = 7; break; +#endif +#ifdef B600 + case B600: ospeed = 8; break; +#endif +#ifdef B1200 + case B1200: ospeed = 9; break; +#endif +#ifdef B1800 + case B1800: ospeed = 10; break; +#endif +#ifdef B2400 + case B2400: ospeed = 11; break; +#endif +#ifdef B4800 + case B4800: ospeed = 12; break; +#endif +#ifdef B9600 + case B9600: ospeed = 13; break; +#endif +#ifdef EXTA + case EXTA: ospeed = 14; break; +#endif +#ifdef EXTB + case EXTB: ospeed = 15; break; +#endif +#ifdef B57600 + case B57600: ospeed = 16; break; +#endif +#ifdef B115200 + case B115200: ospeed = 17; break; +#endif + default: ; + } +#endif + erase_char = s.c_cc[VERASE]; +#ifdef VERASE2 + erase2_char = s.c_cc[VERASE2]; +#endif + kill_char = s.c_cc[VKILL]; +#ifdef VWERASE + werase_char = s.c_cc[VWERASE]; +#else + werase_char = CONTROL('W'); +#endif + + /* + * Set the modes to the way we want them. + */ + s.c_lflag &= ~(0 +#ifdef ICANON + | ICANON +#endif +#ifdef ECHO + | ECHO +#endif +#ifdef ECHOE + | ECHOE +#endif +#ifdef ECHOK + | ECHOK +#endif +#if ECHONL + | ECHONL +#endif + ); + + s.c_oflag |= (0 +#ifdef OXTABS + | OXTABS +#else +#ifdef TAB3 + | TAB3 +#else +#ifdef XTABS + | XTABS +#endif +#endif +#endif +#ifdef OPOST + | OPOST +#endif +#ifdef ONLCR + | ONLCR +#endif + ); + + s.c_oflag &= ~(0 +#ifdef ONOEOT + | ONOEOT +#endif +#ifdef OCRNL + | OCRNL +#endif +#ifdef ONOCR + | ONOCR +#endif +#ifdef ONLRET + | ONLRET +#endif + ); + s.c_cc[VMIN] = 1; + s.c_cc[VTIME] = 0; +#ifdef VLNEXT + s.c_cc[VLNEXT] = 0; +#endif +#ifdef VDSUSP + s.c_cc[VDSUSP] = 0; +#endif +#if MUST_SET_LINE_DISCIPLINE + /* + * System's termios is broken; need to explicitly + * request TERMIODISC line discipline. + */ + s.c_line = TERMIODISC; +#endif + } else + { + /* + * Restore saved modes. + */ + s = save_term; + } +#if HAVE_FSYNC + fsync(tty); +#endif + tcsetattr(tty, TCSADRAIN, &s); +#if MUST_SET_LINE_DISCIPLINE + if (!on) + { + /* + * Broken termios *ignores* any line discipline + * except TERMIODISC. A different old line discipline + * is therefore not restored, yet. Restore the old + * line discipline by hand. + */ + ioctl(tty, TIOCSETD, &save_term.c_line); + } +#endif + } +#else +#ifdef TCGETA + { + struct termio s; + static struct termio save_term; + static int saved_term = 0; + + if (on) + { + /* + * Get terminal modes. + */ + ioctl(tty, TCGETA, &s); + + /* + * Save modes and set certain variables dependent on modes. + */ + if (!saved_term) + { + save_term = s; + saved_term = 1; + } +#if HAVE_OSPEED + ospeed = s.c_cflag & CBAUD; +#endif + erase_char = s.c_cc[VERASE]; + kill_char = s.c_cc[VKILL]; +#ifdef VWERASE + werase_char = s.c_cc[VWERASE]; +#else + werase_char = CONTROL('W'); +#endif + + /* + * Set the modes to the way we want them. + */ + s.c_lflag &= ~(ICANON|ECHO|ECHOE|ECHOK|ECHONL); + s.c_oflag |= (OPOST|ONLCR|TAB3); + s.c_oflag &= ~(OCRNL|ONOCR|ONLRET); + s.c_cc[VMIN] = 1; + s.c_cc[VTIME] = 0; + } else + { + /* + * Restore saved modes. + */ + s = save_term; + } + ioctl(tty, TCSETAW, &s); + } +#else +#ifdef TIOCGETP + { + struct sgttyb s; + static struct sgttyb save_term; + static int saved_term = 0; + + if (on) + { + /* + * Get terminal modes. + */ + ioctl(tty, TIOCGETP, &s); + + /* + * Save modes and set certain variables dependent on modes. + */ + if (!saved_term) + { + save_term = s; + saved_term = 1; + } +#if HAVE_OSPEED + ospeed = s.sg_ospeed; +#endif + erase_char = s.sg_erase; + kill_char = s.sg_kill; + werase_char = CONTROL('W'); + + /* + * Set the modes to the way we want them. + */ + s.sg_flags |= CBREAK; + s.sg_flags &= ~(ECHO|XTABS); + } else + { + /* + * Restore saved modes. + */ + s = save_term; + } + ioctl(tty, TIOCSETN, &s); + } +#else +#ifdef _OSK + { + struct sgbuf s; + static struct sgbuf save_term; + static int saved_term = 0; + + if (on) + { + /* + * Get terminal modes. + */ + _gs_opt(tty, &s); + + /* + * Save modes and set certain variables dependent on modes. + */ + if (!saved_term) + { + save_term = s; + saved_term = 1; + } + erase_char = s.sg_bspch; + kill_char = s.sg_dlnch; + werase_char = CONTROL('W'); + + /* + * Set the modes to the way we want them. + */ + s.sg_echo = 0; + s.sg_eofch = 0; + s.sg_pause = 0; + s.sg_psch = 0; + } else + { + /* + * Restore saved modes. + */ + s = save_term; + } + _ss_opt(tty, &s); + } +#else + /* MS-DOS, Windows, or OS2 */ +#if OS2 + /* OS2 */ + LSIGNAL(SIGINT, SIG_IGN); +#endif + erase_char = '\b'; +#if MSDOS_COMPILER==DJGPPC + kill_char = CONTROL('U'); + /* + * So that when we shell out or run another program, its + * stdin is in cooked mode. We do not switch stdin to binary + * mode if fd0 is zero, since that means we were called before + * tty was reopened in open_getchr, in which case we would be + * changing the original stdin device outside less. + */ + if (fd0 != 0) + setmode(0, on ? O_BINARY : O_TEXT); +#else + kill_char = ESC; +#endif + werase_char = CONTROL('W'); +#endif +#endif +#endif +#endif + curr_on = on; +} + +#if !MSDOS_COMPILER +/* + * Some glue to prevent calling termcap functions if tgetent() failed. + */ +static int hardcopy; + + static char * +ltget_env(capname) + char *capname; +{ + char name[16]; + + strcpy(name, "LESS_TERMCAP_"); + strcat(name, capname); + return (lgetenv(name)); +} + + static int +ltgetflag(capname) + char *capname; +{ + char *s; + + if ((s = ltget_env(capname)) != NULL) + return (*s != '\0' && *s != '0'); + if (hardcopy) + return (0); + return (tgetflag(capname)); +} + + static int +ltgetnum(capname) + char *capname; +{ + char *s; + + if ((s = ltget_env(capname)) != NULL) + return (atoi(s)); + if (hardcopy) + return (-1); + return (tgetnum(capname)); +} + + static char * +ltgetstr(capname, pp) + char *capname; + char **pp; +{ + char *s; + + if ((s = ltget_env(capname)) != NULL) + return (s); + if (hardcopy) + return (NULL); + return (tgetstr(capname, pp)); +} +#endif /* MSDOS_COMPILER */ + +/* + * Get size of the output screen. + */ + public void +scrsize() +{ + register char *s; + int sys_height; + int sys_width; +#if !MSDOS_COMPILER + int n; +#endif + +#define DEF_SC_WIDTH 80 +#if MSDOS_COMPILER +#define DEF_SC_HEIGHT 25 +#else +#define DEF_SC_HEIGHT 24 +#endif + + + sys_width = sys_height = 0; + +#if MSDOS_COMPILER==MSOFTC + { + struct videoconfig w; + _getvideoconfig(&w); + sys_height = w.numtextrows; + sys_width = w.numtextcols; + } +#else +#if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC + { + struct text_info w; + gettextinfo(&w); + sys_height = w.screenheight; + sys_width = w.screenwidth; + } +#else +#if MSDOS_COMPILER==WIN32C + { + CONSOLE_SCREEN_BUFFER_INFO scr; + GetConsoleScreenBufferInfo(con_out, &scr); + sys_height = scr.srWindow.Bottom - scr.srWindow.Top + 1; + sys_width = scr.srWindow.Right - scr.srWindow.Left + 1; + } +#else +#if OS2 + { + int s[2]; + _scrsize(s); + sys_width = s[0]; + sys_height = s[1]; + /* + * When using terminal emulators for XFree86/OS2, the + * _scrsize function does not work well. + * Call the scrsize.exe program to get the window size. + */ + windowid = getenv("WINDOWID"); + if (windowid != NULL) + { + FILE *fd = popen("scrsize", "rt"); + if (fd != NULL) + { + int w, h; + fscanf(fd, "%i %i", &w, &h); + if (w > 0 && h > 0) + { + sys_width = w; + sys_height = h; + } + pclose(fd); + } + } + } +#else +#ifdef TIOCGWINSZ + { + struct winsize w; + if (ioctl(2, TIOCGWINSZ, &w) == 0) + { + if (w.ws_row > 0) + sys_height = w.ws_row; + if (w.ws_col > 0) + sys_width = w.ws_col; + } + } +#else +#ifdef WIOCGETD + { + struct uwdata w; + if (ioctl(2, WIOCGETD, &w) == 0) + { + if (w.uw_height > 0) + sys_height = w.uw_height / w.uw_vs; + if (w.uw_width > 0) + sys_width = w.uw_width / w.uw_hs; + } + } +#endif +#endif +#endif +#endif +#endif +#endif + + if (sys_height > 0) + sc_height = sys_height; + else if ((s = lgetenv("LINES")) != NULL) + sc_height = atoi(s); +#if !MSDOS_COMPILER + else if ((n = ltgetnum("li")) > 0) + sc_height = n; +#endif + else + sc_height = DEF_SC_HEIGHT; + + if (sys_width > 0) + sc_width = sys_width; + else if ((s = lgetenv("COLUMNS")) != NULL) + sc_width = atoi(s); +#if !MSDOS_COMPILER + else if ((n = ltgetnum("co")) > 0) + sc_width = n; +#endif + else + sc_width = DEF_SC_WIDTH; +} + +#if MSDOS_COMPILER==MSOFTC +/* + * Figure out how many empty loops it takes to delay a millisecond. + */ + static void +get_clock() +{ + clock_t start; + + /* + * Get synchronized at the start of a tick. + */ + start = clock(); + while (clock() == start) + ; + /* + * Now count loops till the next tick. + */ + start = clock(); + msec_loops = 0; + while (clock() == start) + msec_loops++; + /* + * Convert from (loops per clock) to (loops per millisecond). + */ + msec_loops *= CLOCKS_PER_SEC; + msec_loops /= 1000; +} + +/* + * Delay for a specified number of milliseconds. + */ + static void +dummy_func() +{ + static long delay_dummy = 0; + delay_dummy++; +} + + static void +delay(msec) + int msec; +{ + long i; + + while (msec-- > 0) + { + for (i = 0; i < msec_loops; i++) + { + /* + * Make it look like we're doing something here, + * so the optimizer doesn't remove the whole loop. + */ + dummy_func(); + } + } +} +#endif + +/* + * Return the characters actually input by a "special" key. + */ + public char * +special_key_str(key) + int key; +{ + static char tbuf[40]; + char *s; +#if MSDOS_COMPILER || OS2 + static char k_right[] = { '\340', PCK_RIGHT, 0 }; + static char k_left[] = { '\340', PCK_LEFT, 0 }; + static char k_ctl_right[] = { '\340', PCK_CTL_RIGHT, 0 }; + static char k_ctl_left[] = { '\340', PCK_CTL_LEFT, 0 }; + static char k_insert[] = { '\340', PCK_INSERT, 0 }; + static char k_delete[] = { '\340', PCK_DELETE, 0 }; + static char k_ctl_delete[] = { '\340', PCK_CTL_DELETE, 0 }; + static char k_ctl_backspace[] = { '\177', 0 }; + static char k_home[] = { '\340', PCK_HOME, 0 }; + static char k_end[] = { '\340', PCK_END, 0 }; + static char k_up[] = { '\340', PCK_UP, 0 }; + static char k_down[] = { '\340', PCK_DOWN, 0 }; + static char k_backtab[] = { '\340', PCK_SHIFT_TAB, 0 }; + static char k_pagedown[] = { '\340', PCK_PAGEDOWN, 0 }; + static char k_pageup[] = { '\340', PCK_PAGEUP, 0 }; + static char k_f1[] = { '\340', PCK_F1, 0 }; +#endif +#if !MSDOS_COMPILER + char *sp = tbuf; +#endif + + switch (key) + { +#if OS2 + /* + * If windowid is not NULL, assume less is executed in + * the XFree86 environment. + */ + case SK_RIGHT_ARROW: + s = windowid ? ltgetstr("kr", &sp) : k_right; + break; + case SK_LEFT_ARROW: + s = windowid ? ltgetstr("kl", &sp) : k_left; + break; + case SK_UP_ARROW: + s = windowid ? ltgetstr("ku", &sp) : k_up; + break; + case SK_DOWN_ARROW: + s = windowid ? ltgetstr("kd", &sp) : k_down; + break; + case SK_PAGE_UP: + s = windowid ? ltgetstr("kP", &sp) : k_pageup; + break; + case SK_PAGE_DOWN: + s = windowid ? ltgetstr("kN", &sp) : k_pagedown; + break; + case SK_HOME: + s = windowid ? ltgetstr("kh", &sp) : k_home; + break; + case SK_END: + s = windowid ? ltgetstr("@7", &sp) : k_end; + break; + case SK_DELETE: + if (windowid) + { + s = ltgetstr("kD", &sp); + if (s == NULL) + { + tbuf[0] = '\177'; + tbuf[1] = '\0'; + s = tbuf; + } + } else + s = k_delete; + break; +#endif +#if MSDOS_COMPILER + case SK_RIGHT_ARROW: + s = k_right; + break; + case SK_LEFT_ARROW: + s = k_left; + break; + case SK_UP_ARROW: + s = k_up; + break; + case SK_DOWN_ARROW: + s = k_down; + break; + case SK_PAGE_UP: + s = k_pageup; + break; + case SK_PAGE_DOWN: + s = k_pagedown; + break; + case SK_HOME: + s = k_home; + break; + case SK_END: + s = k_end; + break; + case SK_DELETE: + s = k_delete; + break; +#endif +#if MSDOS_COMPILER || OS2 + case SK_INSERT: + s = k_insert; + break; + case SK_CTL_LEFT_ARROW: + s = k_ctl_left; + break; + case SK_CTL_RIGHT_ARROW: + s = k_ctl_right; + break; + case SK_CTL_BACKSPACE: + s = k_ctl_backspace; + break; + case SK_CTL_DELETE: + s = k_ctl_delete; + break; + case SK_F1: + s = k_f1; + break; + case SK_BACKTAB: + s = k_backtab; + break; +#else + case SK_RIGHT_ARROW: + s = ltgetstr("kr", &sp); + break; + case SK_LEFT_ARROW: + s = ltgetstr("kl", &sp); + break; + case SK_UP_ARROW: + s = ltgetstr("ku", &sp); + break; + case SK_DOWN_ARROW: + s = ltgetstr("kd", &sp); + break; + case SK_PAGE_UP: + s = ltgetstr("kP", &sp); + break; + case SK_PAGE_DOWN: + s = ltgetstr("kN", &sp); + break; + case SK_HOME: + s = ltgetstr("kh", &sp); + break; + case SK_END: + s = ltgetstr("@7", &sp); + break; + case SK_DELETE: + s = ltgetstr("kD", &sp); + if (s == NULL) + { + tbuf[0] = '\177'; + tbuf[1] = '\0'; + s = tbuf; + } + break; +#endif + case SK_CONTROL_K: + tbuf[0] = CONTROL('K'); + tbuf[1] = '\0'; + s = tbuf; + break; + default: + return (NULL); + } + return (s); +} + +/* + * Get terminal capabilities via termcap. + */ + public void +get_term() +{ +#if MSDOS_COMPILER + auto_wrap = 1; + ignaw = 0; + can_goto_line = 1; + clear_bg = 1; + /* + * Set up default colors. + * The xx_s_width and xx_e_width vars are already initialized to 0. + */ +#if MSDOS_COMPILER==MSOFTC + sy_bg_color = _getbkcolor(); + sy_fg_color = _gettextcolor(); + get_clock(); +#else +#if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC + { + struct text_info w; + gettextinfo(&w); + sy_bg_color = (w.attribute >> 4) & 0x0F; + sy_fg_color = (w.attribute >> 0) & 0x0F; + } +#else +#if MSDOS_COMPILER==WIN32C + { + DWORD nread; + CONSOLE_SCREEN_BUFFER_INFO scr; + + con_out_save = con_out = GetStdHandle(STD_OUTPUT_HANDLE); + /* + * Always open stdin in binary. Note this *must* be done + * before any file operations have been done on fd0. + */ + SET_BINARY(0); + GetConsoleScreenBufferInfo(con_out, &scr); + ReadConsoleOutputAttribute(con_out, &curr_attr, + 1, scr.dwCursorPosition, &nread); + sy_bg_color = (curr_attr & BG_COLORS) >> 4; /* normalize */ + sy_fg_color = curr_attr & FG_COLORS; + } +#endif +#endif +#endif + nm_fg_color = sy_fg_color; + nm_bg_color = sy_bg_color; + bo_fg_color = 11; + bo_bg_color = 0; + ul_fg_color = 9; + ul_bg_color = 0; + so_fg_color = 15; + so_bg_color = 9; + bl_fg_color = 15; + bl_bg_color = 0; + + /* + * Get size of the screen. + */ + scrsize(); + pos_init(); + + +#else /* !MSDOS_COMPILER */ + + char *sp; + register char *t1, *t2; + char *term; + char termbuf[TERMBUF_SIZE]; + + static char sbuf[TERMSBUF_SIZE]; + +#if OS2 + /* + * Make sure the termcap database is available. + */ + sp = lgetenv("TERMCAP"); + if (sp == NULL || *sp == '\0') + { + char *termcap; + if ((sp = homefile("termcap.dat")) != NULL) + { + termcap = (char *) ecalloc(strlen(sp)+9, sizeof(char)); + sprintf(termcap, "TERMCAP=%s", sp); + free(sp); + putenv(termcap); + } + } +#endif + /* + * Find out what kind of terminal this is. + */ + if ((term = lgetenv("TERM")) == NULL) + term = DEFAULT_TERM; + hardcopy = 0; + if (tgetent(termbuf, term) <= 0) + hardcopy = 1; + if (ltgetflag("hc")) + hardcopy = 1; + + /* + * Get size of the screen. + */ + scrsize(); + pos_init(); + + auto_wrap = ltgetflag("am"); + ignaw = ltgetflag("xn"); + above_mem = ltgetflag("da"); + below_mem = ltgetflag("db"); + clear_bg = ltgetflag("ut"); + + /* + * Assumes termcap variable "sg" is the printing width of: + * the standout sequence, the end standout sequence, + * the underline sequence, the end underline sequence, + * the boldface sequence, and the end boldface sequence. + */ + if ((so_s_width = ltgetnum("sg")) < 0) + so_s_width = 0; + so_e_width = so_s_width; + + bo_s_width = bo_e_width = so_s_width; + ul_s_width = ul_e_width = so_s_width; + bl_s_width = bl_e_width = so_s_width; + +#if HILITE_SEARCH + if (so_s_width > 0 || so_e_width > 0) + /* + * Disable highlighting by default on magic cookie terminals. + * Turning on highlighting might change the displayed width + * of a line, causing the display to get messed up. + * The user can turn it back on with -g, + * but she won't like the results. + */ + hilite_search = 0; +#endif + + /* + * Get various string-valued capabilities. + */ + sp = sbuf; + +#if HAVE_OSPEED + sc_pad = ltgetstr("pc", &sp); + if (sc_pad != NULL) + PC = *sc_pad; +#endif + + sc_s_keypad = ltgetstr("ks", &sp); + if (sc_s_keypad == NULL) + sc_s_keypad = ""; + sc_e_keypad = ltgetstr("ke", &sp); + if (sc_e_keypad == NULL) + sc_e_keypad = ""; + + /* + * This loses for terminals with termcap entries with ti/te strings + * that switch to/from an alternate screen, and we're in quit_at_eof + * (eg, more(1)). + */ + if (quit_at_eof != OPT_ONPLUS && !more_mode) { + sc_init = ltgetstr("ti", &sp); + sc_deinit = ltgetstr("te", &sp); + } else { + sc_init = NULL; + sc_deinit = NULL; + } + + if (sc_init == NULL) + sc_init = ""; + if (sc_deinit == NULL) + sc_deinit = ""; + + sc_eol_clear = ltgetstr("ce", &sp); + if (sc_eol_clear == NULL || *sc_eol_clear == '\0') + { + missing_cap = 1; + sc_eol_clear = ""; + } + + sc_eos_clear = ltgetstr("cd", &sp); + if (below_mem && (sc_eos_clear == NULL || *sc_eos_clear == '\0')) + { + missing_cap = 1; + sc_eos_clear = ""; + } + + sc_clear = ltgetstr("cl", &sp); + if (sc_clear == NULL || *sc_clear == '\0') + { + missing_cap = 1; + sc_clear = "\n\n"; + } + + sc_move = ltgetstr("cm", &sp); + if (sc_move == NULL || *sc_move == '\0') + { + /* + * This is not an error here, because we don't + * always need sc_move. + * We need it only if we don't have home or lower-left. + */ + sc_move = ""; + can_goto_line = 0; + } else + can_goto_line = 1; + + tmodes("so", "se", &sc_s_in, &sc_s_out, "", "", &sp); + tmodes("us", "ue", &sc_u_in, &sc_u_out, sc_s_in, sc_s_out, &sp); + tmodes("md", "me", &sc_b_in, &sc_b_out, sc_s_in, sc_s_out, &sp); + tmodes("mb", "me", &sc_bl_in, &sc_bl_out, sc_s_in, sc_s_out, &sp); + + sc_visual_bell = ltgetstr("vb", &sp); + if (sc_visual_bell == NULL) + sc_visual_bell = ""; + + if (ltgetflag("bs")) + sc_backspace = "\b"; + else + { + sc_backspace = ltgetstr("bc", &sp); + if (sc_backspace == NULL || *sc_backspace == '\0') + sc_backspace = "\b"; + } + + /* + * Choose between using "ho" and "cm" ("home" and "cursor move") + * to move the cursor to the upper left corner of the screen. + */ + t1 = ltgetstr("ho", &sp); + if (t1 == NULL) + t1 = ""; + if (*sc_move == '\0') + t2 = ""; + else + { + strcpy(sp, tgoto(sc_move, 0, 0)); + t2 = sp; + sp += strlen(sp) + 1; + } + sc_home = cheaper(t1, t2, "|\b^"); + + /* + * Choose between using "ll" and "cm" ("lower left" and "cursor move") + * to move the cursor to the lower left corner of the screen. + */ + t1 = ltgetstr("ll", &sp); + if (t1 == NULL) + t1 = ""; + if (*sc_move == '\0') + t2 = ""; + else + { + strcpy(sp, tgoto(sc_move, 0, sc_height-1)); + t2 = sp; + sp += strlen(sp) + 1; + } + sc_lower_left = cheaper(t1, t2, "\r"); + + /* + * Choose between using "al" or "sr" ("add line" or "scroll reverse") + * to add a line at the top of the screen. + */ + t1 = ltgetstr("al", &sp); + if (t1 == NULL) + t1 = ""; + t2 = ltgetstr("sr", &sp); + if (t2 == NULL) + t2 = ""; +#if OS2 + if (*t1 == '\0' && *t2 == '\0') + sc_addline = ""; + else +#endif + if (above_mem) + sc_addline = t1; + else + sc_addline = cheaper(t1, t2, ""); + if (*sc_addline == '\0') + { + /* + * Force repaint on any backward movement. + */ + no_back_scroll = 1; + } +#endif /* MSDOS_COMPILER */ +} + +#if !MSDOS_COMPILER +/* + * Return the cost of displaying a termcap string. + * We use the trick of calling tputs, but as a char printing function + * we give it inc_costcount, which just increments "costcount". + * This tells us how many chars would be printed by using this string. + * {{ Couldn't we just use strlen? }} + */ +static int costcount; + +typedef void (*tputfunc)(int); + +/*ARGSUSED*/ + static int +inc_costcount(c) + int c; +{ + costcount++; + return (c); +} + + static int +cost(t) + char *t; +{ + costcount = 0; + tputs(t, sc_height, (tputfunc) inc_costcount); + return (costcount); +} + +/* + * Return the "best" of the two given termcap strings. + * The best, if both exist, is the one with the lower + * cost (see cost() function). + */ + static char * +cheaper(t1, t2, def) + char *t1, *t2; + char *def; +{ + if (*t1 == '\0' && *t2 == '\0') + { + missing_cap = 1; + return (def); + } + if (*t1 == '\0') + return (t2); + if (*t2 == '\0') + return (t1); + if (cost(t1) < cost(t2)) + return (t1); + return (t2); +} + + static void +tmodes(incap, outcap, instr, outstr, def_instr, def_outstr, spp) + char *incap; + char *outcap; + char **instr; + char **outstr; + char *def_instr; + char *def_outstr; + char **spp; +{ + *instr = ltgetstr(incap, spp); + if (*instr == NULL) + { + /* Use defaults. */ + *instr = def_instr; + *outstr = def_outstr; + return; + } + + *outstr = ltgetstr(outcap, spp); + if (*outstr == NULL) + /* No specific out capability; use "me". */ + *outstr = ltgetstr("me", spp); + if (*outstr == NULL) + /* Don't even have "me"; use a null string. */ + *outstr = ""; +} + +#endif /* MSDOS_COMPILER */ + + +/* + * Below are the functions which perform all the + * terminal-specific screen manipulation. + */ + + +#if MSDOS_COMPILER + +#if MSDOS_COMPILER==WIN32C + static void +_settextposition(int row, int col) +{ + COORD cpos; + CONSOLE_SCREEN_BUFFER_INFO csbi; + + GetConsoleScreenBufferInfo(con_out, &csbi); + cpos.X = csbi.srWindow.Left + (col - 1); + cpos.Y = csbi.srWindow.Top + (row - 1); + SetConsoleCursorPosition(con_out, cpos); +} +#endif + +/* + * Initialize the screen to the correct color at startup. + */ + static void +initcolor() +{ + SETCOLORS(nm_fg_color, nm_bg_color); +#if 0 + /* + * This clears the screen at startup. This is different from + * the behavior of other versions of less. Disable it for now. + */ + char *blanks; + int row; + int col; + + /* + * Create a complete, blank screen using "normal" colors. + */ + SETCOLORS(nm_fg_color, nm_bg_color); + blanks = (char *) ecalloc(width+1, sizeof(char)); + for (col = 0; col < sc_width; col++) + blanks[col] = ' '; + blanks[sc_width] = '\0'; + for (row = 0; row < sc_height; row++) + _outtext(blanks); + free(blanks); +#endif +} +#endif + +#if MSDOS_COMPILER==WIN32C + +/* + * Termcap-like init with a private win32 console. + */ + static void +win32_init_term() +{ + CONSOLE_SCREEN_BUFFER_INFO scr; + COORD size; + + if (con_out_save == INVALID_HANDLE_VALUE) + return; + + GetConsoleScreenBufferInfo(con_out_save, &scr); + + if (con_out_ours == INVALID_HANDLE_VALUE) + { + /* + * Create our own screen buffer, so that we + * may restore the original when done. + */ + con_out_ours = CreateConsoleScreenBuffer( + GENERIC_WRITE | GENERIC_READ, + FILE_SHARE_WRITE | FILE_SHARE_READ, + (LPSECURITY_ATTRIBUTES) NULL, + CONSOLE_TEXTMODE_BUFFER, + (LPVOID) NULL); + } + + size.X = scr.srWindow.Right - scr.srWindow.Left + 1; + size.Y = scr.srWindow.Bottom - scr.srWindow.Top + 1; + SetConsoleScreenBufferSize(con_out_ours, size); + SetConsoleActiveScreenBuffer(con_out_ours); + con_out = con_out_ours; +} + +/* + * Restore the startup console. + */ +static void +win32_deinit_term() +{ + if (con_out_save == INVALID_HANDLE_VALUE) + return; + if (quitting) + (void) CloseHandle(con_out_ours); + SetConsoleActiveScreenBuffer(con_out_save); + con_out = con_out_save; +} + +#endif + +/* + * Initialize terminal + */ + public void +init() +{ +#if !MSDOS_COMPILER + if (!no_init) + tputs(sc_init, sc_height, (tputfunc) putchr); + if (!no_keypad) + tputs(sc_s_keypad, sc_height, (tputfunc) putchr); + if (top_scroll) + { + int i; + + /* + * This is nice to terminals with no alternate screen, + * but with saved scrolled-off-the-top lines. This way, + * no previous line is lost, but we start with a whole + * screen to ourself. + */ + for (i = 1; i < sc_height; i++) + putchr('\n'); + } +#else +#if MSDOS_COMPILER==WIN32C + if (!no_init) + win32_init_term(); +#endif + initcolor(); + flush(); +#endif + init_done = 1; +} + +/* + * Deinitialize terminal + */ + public void +deinit() +{ + if (!init_done) + return; +#if !MSDOS_COMPILER + if (!no_keypad) + tputs(sc_e_keypad, sc_height, (tputfunc) putchr); + if (!no_init) + tputs(sc_deinit, sc_height, (tputfunc) putchr); +#else + /* Restore system colors. */ + SETCOLORS(sy_fg_color, sy_bg_color); +#if MSDOS_COMPILER==WIN32C + if (!no_init) + win32_deinit_term(); +#else + /* Need clreol to make SETCOLORS take effect. */ + clreol(); +#endif +#endif + init_done = 0; +} + +/* + * Home cursor (move to upper left corner of screen). + */ + public void +home() +{ +#if !MSDOS_COMPILER + tputs(sc_home, 1, (tputfunc) putchr); +#else + flush(); + _settextposition(1,1); +#endif +} + +/* + * Add a blank line (called with cursor at home). + * Should scroll the display down. + */ + public void +add_line() +{ +#if !MSDOS_COMPILER + tputs(sc_addline, sc_height, (tputfunc) putchr); +#else + flush(); +#if MSDOS_COMPILER==MSOFTC + _scrolltextwindow(_GSCROLLDOWN); + _settextposition(1,1); +#else +#if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC + movetext(1,1, sc_width,sc_height-1, 1,2); + gotoxy(1,1); + clreol(); +#else +#if MSDOS_COMPILER==WIN32C + { + CHAR_INFO fillchar; + SMALL_RECT rcSrc, rcClip; + COORD new_org; + CONSOLE_SCREEN_BUFFER_INFO csbi; + + GetConsoleScreenBufferInfo(con_out,&csbi); + + /* The clip rectangle is the entire visible screen. */ + rcClip.Left = csbi.srWindow.Left; + rcClip.Top = csbi.srWindow.Top; + rcClip.Right = csbi.srWindow.Right; + rcClip.Bottom = csbi.srWindow.Bottom; + + /* The source rectangle is the visible screen minus the last line. */ + rcSrc = rcClip; + rcSrc.Bottom--; + + /* Move the top left corner of the source window down one row. */ + new_org.X = rcSrc.Left; + new_org.Y = rcSrc.Top + 1; + + /* Fill the right character and attributes. */ + fillchar.Char.AsciiChar = ' '; + curr_attr = MAKEATTR(nm_fg_color, nm_bg_color); + fillchar.Attributes = curr_attr; + ScrollConsoleScreenBuffer(con_out, &rcSrc, &rcClip, new_org, &fillchar); + _settextposition(1,1); + } +#endif +#endif +#endif +#endif +} + +#if 0 +/* + * Remove the n topmost lines and scroll everything below it in the + * window upward. This is needed to stop leaking the topmost line + * into the scrollback buffer when we go down-one-line (in WIN32). + */ + public void +remove_top(n) + int n; +{ +#if MSDOS_COMPILER==WIN32C + SMALL_RECT rcSrc, rcClip; + CHAR_INFO fillchar; + COORD new_org; + CONSOLE_SCREEN_BUFFER_INFO csbi; /* to get buffer info */ + + if (n >= sc_height - 1) + { + clear(); + home(); + return; + } + + flush(); + + GetConsoleScreenBufferInfo(con_out, &csbi); + + /* Get the extent of all-visible-rows-but-the-last. */ + rcSrc.Left = csbi.srWindow.Left; + rcSrc.Top = csbi.srWindow.Top + n; + rcSrc.Right = csbi.srWindow.Right; + rcSrc.Bottom = csbi.srWindow.Bottom; + + /* Get the clip rectangle. */ + rcClip.Left = rcSrc.Left; + rcClip.Top = csbi.srWindow.Top; + rcClip.Right = rcSrc.Right; + rcClip.Bottom = rcSrc.Bottom ; + + /* Move the source window up n rows. */ + new_org.X = rcSrc.Left; + new_org.Y = rcSrc.Top - n; + + /* Fill the right character and attributes. */ + fillchar.Char.AsciiChar = ' '; + curr_attr = MAKEATTR(nm_fg_color, nm_bg_color); + fillchar.Attributes = curr_attr; + + ScrollConsoleScreenBuffer(con_out, &rcSrc, &rcClip, new_org, &fillchar); + + /* Position cursor on first blank line. */ + goto_line(sc_height - n - 1); +#endif +} +#endif + +#if MSDOS_COMPILER==WIN32C +/* + * Clear the screen. + */ + static void +win32_clear() +{ + /* + * This will clear only the currently visible rows of the NT + * console buffer, which means none of the precious scrollback + * rows are touched making for faster scrolling. Note that, if + * the window has fewer columns than the console buffer (i.e. + * there is a horizontal scrollbar as well), the entire width + * of the visible rows will be cleared. + */ + COORD topleft; + DWORD nchars; + DWORD winsz; + CONSOLE_SCREEN_BUFFER_INFO csbi; + + /* get the number of cells in the current buffer */ + GetConsoleScreenBufferInfo(con_out, &csbi); + winsz = csbi.dwSize.X * (csbi.srWindow.Bottom - csbi.srWindow.Top + 1); + topleft.X = 0; + topleft.Y = csbi.srWindow.Top; + + curr_attr = MAKEATTR(nm_fg_color, nm_bg_color); + FillConsoleOutputCharacter(con_out, ' ', winsz, topleft, &nchars); + FillConsoleOutputAttribute(con_out, curr_attr, winsz, topleft, &nchars); +} + +/* + * Remove the n topmost lines and scroll everything below it in the + * window upward. + */ + public void +win32_scroll_up(n) + int n; +{ + SMALL_RECT rcSrc, rcClip; + CHAR_INFO fillchar; + COORD topleft; + COORD new_org; + DWORD nchars; + DWORD size; + CONSOLE_SCREEN_BUFFER_INFO csbi; + + if (n <= 0) + return; + + if (n >= sc_height - 1) + { + win32_clear(); + _settextposition(1,1); + return; + } + + /* Get the extent of what will remain visible after scrolling. */ + GetConsoleScreenBufferInfo(con_out, &csbi); + rcSrc.Left = csbi.srWindow.Left; + rcSrc.Top = csbi.srWindow.Top + n; + rcSrc.Right = csbi.srWindow.Right; + rcSrc.Bottom = csbi.srWindow.Bottom; + + /* Get the clip rectangle. */ + rcClip.Left = rcSrc.Left; + rcClip.Top = csbi.srWindow.Top; + rcClip.Right = rcSrc.Right; + rcClip.Bottom = rcSrc.Bottom ; + + /* Move the source text to the top of the screen. */ + new_org.X = rcSrc.Left; + new_org.Y = 0; + + /* Fill the right character and attributes. */ + fillchar.Char.AsciiChar = ' '; + fillchar.Attributes = MAKEATTR(nm_fg_color, nm_bg_color); + + /* Scroll the window. */ + SetConsoleTextAttribute(con_out, fillchar.Attributes); + ScrollConsoleScreenBuffer(con_out, &rcSrc, &rcClip, new_org, &fillchar); + + /* Clear remaining lines at bottom. */ + topleft.X = csbi.dwCursorPosition.X; + topleft.Y = rcSrc.Bottom - n; + size = (n * csbi.dwSize.X) + (rcSrc.Right - topleft.X); + FillConsoleOutputCharacter(con_out, ' ', size, topleft, + &nchars); + FillConsoleOutputAttribute(con_out, fillchar.Attributes, size, topleft, + &nchars); + SetConsoleTextAttribute(con_out, curr_attr); + + /* Move cursor n lines up from where it was. */ + csbi.dwCursorPosition.Y -= n; + SetConsoleCursorPosition(con_out, csbi.dwCursorPosition); +} +#endif + +/* + * Move cursor to lower left corner of screen. + */ + public void +lower_left() +{ +#if !MSDOS_COMPILER + tputs(sc_lower_left, 1, (tputfunc) putchr); +#else + flush(); + _settextposition(sc_height, 1); +#endif +} + +/* + * Check if the console size has changed and reset internals + * (in lieu of SIGWINCH for WIN32). + */ + public void +check_winch() +{ +#if MSDOS_COMPILER==WIN32C + CONSOLE_SCREEN_BUFFER_INFO scr; + COORD size; + + if (con_out == INVALID_HANDLE_VALUE) + return; + + flush(); + GetConsoleScreenBufferInfo(con_out, &scr); + size.Y = scr.srWindow.Bottom - scr.srWindow.Top + 1; + size.X = scr.srWindow.Right - scr.srWindow.Left + 1; + if (size.Y != sc_height || size.X != sc_width) + { + sc_height = size.Y; + sc_width = size.X; + if (!no_init && con_out_ours == con_out) + SetConsoleScreenBufferSize(con_out, size); + pos_init(); + wscroll = (sc_height + 1) / 2; + screen_trashed = 1; + } +#endif +} + +/* + * Goto a specific line on the screen. + */ + public void +goto_line(slinenum) + int slinenum; +{ +#if !MSDOS_COMPILER + tputs(tgoto(sc_move, 0, slinenum), 1, (tputfunc) putchr); +#else + flush(); + _settextposition(slinenum+1, 1); +#endif +} + +#if MSDOS_COMPILER==MSOFTC || MSDOS_COMPILER==BORLANDC +/* + * Create an alternate screen which is all white. + * This screen is used to create a "flash" effect, by displaying it + * briefly and then switching back to the normal screen. + * {{ Yuck! There must be a better way to get a visual bell. }} + */ + static void +create_flash() +{ +#if MSDOS_COMPILER==MSOFTC + struct videoconfig w; + char *blanks; + int row, col; + + _getvideoconfig(&w); + videopages = w.numvideopages; + if (videopages < 2) + { + at_enter(AT_STANDOUT); + at_exit(); + } else + { + _setactivepage(1); + at_enter(AT_STANDOUT); + blanks = (char *) ecalloc(w.numtextcols, sizeof(char)); + for (col = 0; col < w.numtextcols; col++) + blanks[col] = ' '; + for (row = w.numtextrows; row > 0; row--) + _outmem(blanks, w.numtextcols); + _setactivepage(0); + _setvisualpage(0); + free(blanks); + at_exit(); + } +#else +#if MSDOS_COMPILER==BORLANDC + register int n; + + whitescreen = (unsigned short *) + malloc(sc_width * sc_height * sizeof(short)); + if (whitescreen == NULL) + return; + for (n = 0; n < sc_width * sc_height; n++) + whitescreen[n] = 0x7020; +#else +#if MSDOS_COMPILER==WIN32C + register int n; + + whitescreen = (WORD *) + malloc(sc_height * sc_width * sizeof(WORD)); + if (whitescreen == NULL) + return; + /* Invert the standard colors. */ + for (n = 0; n < sc_width * sc_height; n++) + whitescreen[n] = (WORD)((nm_fg_color << 4) | nm_bg_color); +#endif +#endif +#endif + flash_created = 1; +} +#endif /* MSDOS_COMPILER */ + +/* + * Output the "visual bell", if there is one. + */ + public void +vbell() +{ +#if !MSDOS_COMPILER + if (*sc_visual_bell == '\0') + return; + tputs(sc_visual_bell, sc_height, (tputfunc) putchr); +#else +#if MSDOS_COMPILER==DJGPPC + ScreenVisualBell(); +#else +#if MSDOS_COMPILER==MSOFTC + /* + * Create a flash screen on the second video page. + * Switch to that page, then switch back. + */ + if (!flash_created) + create_flash(); + if (videopages < 2) + return; + _setvisualpage(1); + delay(100); + _setvisualpage(0); +#else +#if MSDOS_COMPILER==BORLANDC + unsigned short *currscreen; + + /* + * Get a copy of the current screen. + * Display the flash screen. + * Then restore the old screen. + */ + if (!flash_created) + create_flash(); + if (whitescreen == NULL) + return; + currscreen = (unsigned short *) + malloc(sc_width * sc_height * sizeof(short)); + if (currscreen == NULL) return; + gettext(1, 1, sc_width, sc_height, currscreen); + puttext(1, 1, sc_width, sc_height, whitescreen); + delay(100); + puttext(1, 1, sc_width, sc_height, currscreen); + free(currscreen); +#else +#if MSDOS_COMPILER==WIN32C + /* paint screen with an inverse color */ + clear(); + + /* leave it displayed for 100 msec. */ + Sleep(100); + + /* restore with a redraw */ + repaint(); +#endif +#endif +#endif +#endif +#endif +} + +/* + * Make a noise. + */ + static void +beep() +{ +#if !MSDOS_COMPILER + putchr(CONTROL('G')); +#else +#if MSDOS_COMPILER==WIN32C + MessageBeep(0); +#else + write(1, "\7", 1); +#endif +#endif +} + +/* + * Ring the terminal bell. + */ + public void +bell() +{ + if (quiet == VERY_QUIET) + vbell(); + else + beep(); +} + +/* + * Clear the screen. + */ + public void +clear() +{ +#if !MSDOS_COMPILER + tputs(sc_clear, sc_height, (tputfunc) putchr); +#else + flush(); +#if MSDOS_COMPILER==WIN32C + win32_clear(); +#else + _clearscreen(_GCLEARSCREEN); +#endif +#endif +} + +/* + * Clear from the cursor to the end of the cursor's line. + * {{ This must not move the cursor. }} + */ + public void +clear_eol() +{ +#if !MSDOS_COMPILER + tputs(sc_eol_clear, 1, (tputfunc) putchr); +#else +#if MSDOS_COMPILER==MSOFTC + short top, left; + short bot, right; + struct rccoord tpos; + + flush(); + /* + * Save current state. + */ + tpos = _gettextposition(); + _gettextwindow(&top, &left, &bot, &right); + /* + * Set a temporary window to the current line, + * from the cursor's position to the right edge of the screen. + * Then clear that window. + */ + _settextwindow(tpos.row, tpos.col, tpos.row, sc_width); + _clearscreen(_GWINDOW); + /* + * Restore state. + */ + _settextwindow(top, left, bot, right); + _settextposition(tpos.row, tpos.col); +#else +#if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC + flush(); + clreol(); +#else +#if MSDOS_COMPILER==WIN32C + DWORD nchars; + COORD cpos; + CONSOLE_SCREEN_BUFFER_INFO scr; + + flush(); + memset(&scr, 0, sizeof(scr)); + GetConsoleScreenBufferInfo(con_out, &scr); + cpos.X = scr.dwCursorPosition.X; + cpos.Y = scr.dwCursorPosition.Y; + curr_attr = MAKEATTR(nm_fg_color, nm_bg_color); + FillConsoleOutputAttribute(con_out, curr_attr, + scr.dwSize.X - cpos.X, cpos, &nchars); + FillConsoleOutputCharacter(con_out, ' ', + scr.dwSize.X - cpos.X, cpos, &nchars); +#endif +#endif +#endif +#endif +} + +/* + * Clear the current line. + * Clear the screen if there's off-screen memory below the display. + */ + static void +clear_eol_bot() +{ +#if MSDOS_COMPILER + clear_eol(); +#else + if (below_mem) + tputs(sc_eos_clear, 1, (tputfunc) putchr); + else + tputs(sc_eol_clear, 1, (tputfunc) putchr); +#endif +} + +/* + * Clear the bottom line of the display. + * Leave the cursor at the beginning of the bottom line. + */ + public void +clear_bot() +{ + /* + * If we're in a non-normal attribute mode, temporarily exit + * the mode while we do the clear. Some terminals fill the + * cleared area with the current attribute. + */ + lower_left(); + if (attrmode == AT_NORMAL) + clear_eol_bot(); + else + { + int saved_attrmode = attrmode; + + at_exit(); + clear_eol_bot(); + at_enter(saved_attrmode); + } +} + + public void +at_enter(attr) + int attr; +{ + attr = apply_at_specials(attr); + +#if !MSDOS_COMPILER + /* The one with the most priority is last. */ + if (attr & AT_UNDERLINE) + tputs(sc_u_in, 1, (tputfunc) putchr); + if (attr & AT_BOLD) + tputs(sc_b_in, 1, (tputfunc) putchr); + if (attr & AT_BLINK) + tputs(sc_bl_in, 1, (tputfunc) putchr); + if (attr & AT_STANDOUT) + tputs(sc_s_in, 1, (tputfunc) putchr); +#else + flush(); + /* The one with the most priority is first. */ + if (attr & AT_STANDOUT) + { + SETCOLORS(so_fg_color, so_bg_color); + } else if (attr & AT_BLINK) + { + SETCOLORS(bl_fg_color, bl_bg_color); + } + else if (attr & AT_BOLD) + { + SETCOLORS(bo_fg_color, bo_bg_color); + } + else if (attr & AT_UNDERLINE) + { + SETCOLORS(ul_fg_color, ul_bg_color); + } +#endif + + attrmode = attr; +} + + public void +at_exit() +{ +#if !MSDOS_COMPILER + /* Undo things in the reverse order we did them. */ + if (attrmode & AT_STANDOUT) + tputs(sc_s_out, 1, (tputfunc) putchr); + if (attrmode & AT_BLINK) + tputs(sc_bl_out, 1, (tputfunc) putchr); + if (attrmode & AT_BOLD) + tputs(sc_b_out, 1, (tputfunc) putchr); + if (attrmode & AT_UNDERLINE) + tputs(sc_u_out, 1, (tputfunc) putchr); +#else + flush(); + SETCOLORS(nm_fg_color, nm_bg_color); +#endif + + attrmode = AT_NORMAL; +} + + public void +at_switch(attr) + int attr; +{ + if (apply_at_specials(attr) != attrmode) + { + at_exit(); + at_enter(attr); + } +} + + public int +is_at_equiv(attr1, attr2) + int attr1; + int attr2; +{ + attr1 = apply_at_specials(attr1); + attr2 = apply_at_specials(attr2); + + return (attr1 == attr2); +} + + public int +apply_at_specials(attr) + int attr; +{ + if (attr & AT_BINARY) + attr |= binattr; + if (attr & AT_HILITE) + attr |= AT_STANDOUT; + attr &= ~(AT_BINARY|AT_HILITE); + + return attr; +} + +#if 0 /* No longer used */ +/* + * Erase the character to the left of the cursor + * and move the cursor left. + */ + public void +backspace() +{ +#if !MSDOS_COMPILER + /* + * Erase the previous character by overstriking with a space. + */ + tputs(sc_backspace, 1, (tputfunc) putchr); + putchr(' '); + tputs(sc_backspace, 1, (tputfunc) putchr); +#else +#if MSDOS_COMPILER==MSOFTC + struct rccoord tpos; + + flush(); + tpos = _gettextposition(); + if (tpos.col <= 1) + return; + _settextposition(tpos.row, tpos.col-1); + _outtext(" "); + _settextposition(tpos.row, tpos.col-1); +#else +#if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC + cputs("\b"); +#else +#if MSDOS_COMPILER==WIN32C + COORD cpos; + DWORD cChars; + CONSOLE_SCREEN_BUFFER_INFO scr; + + flush(); + GetConsoleScreenBufferInfo(con_out, &scr); + cpos = scr.dwCursorPosition; + if (cpos.X <= 0) + return; + cpos.X--; + SetConsoleCursorPosition(con_out, cpos); + FillConsoleOutputCharacter(con_out, (TCHAR)' ', 1, cpos, &cChars); + SetConsoleCursorPosition(con_out, cpos); +#endif +#endif +#endif +#endif +} +#endif /* 0 */ + +/* + * Output a plain backspace, without erasing the previous char. + */ + public void +putbs() +{ +#if !MSDOS_COMPILER + tputs(sc_backspace, 1, (tputfunc) putchr); +#else + int row, col; + + flush(); + { +#if MSDOS_COMPILER==MSOFTC + struct rccoord tpos; + tpos = _gettextposition(); + row = tpos.row; + col = tpos.col; +#else +#if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC + row = wherey(); + col = wherex(); +#else +#if MSDOS_COMPILER==WIN32C + CONSOLE_SCREEN_BUFFER_INFO scr; + GetConsoleScreenBufferInfo(con_out, &scr); + row = scr.dwCursorPosition.Y - scr.srWindow.Top + 1; + col = scr.dwCursorPosition.X - scr.srWindow.Left + 1; +#endif +#endif +#endif + } + if (col <= 1) + return; + _settextposition(row, col-1); +#endif /* MSDOS_COMPILER */ +} + +#if MSDOS_COMPILER==WIN32C +/* + * Determine whether an input character is waiting to be read. + */ + static int +win32_kbhit(tty) + HANDLE tty; +{ + INPUT_RECORD ip; + DWORD read; + + if (keyCount > 0) + return (TRUE); + + currentKey.ascii = 0; + currentKey.scan = 0; + + /* + * Wait for a real key-down event, but + * ignore SHIFT and CONTROL key events. + */ + do + { + PeekConsoleInput(tty, &ip, 1, &read); + if (read == 0) + return (FALSE); + ReadConsoleInput(tty, &ip, 1, &read); + } while (ip.EventType != KEY_EVENT || + ip.Event.KeyEvent.bKeyDown != TRUE || + ip.Event.KeyEvent.wVirtualScanCode == 0 || + ip.Event.KeyEvent.wVirtualKeyCode == VK_SHIFT || + ip.Event.KeyEvent.wVirtualKeyCode == VK_CONTROL || + ip.Event.KeyEvent.wVirtualKeyCode == VK_MENU); + + currentKey.ascii = ip.Event.KeyEvent.uChar.AsciiChar; + currentKey.scan = ip.Event.KeyEvent.wVirtualScanCode; + keyCount = ip.Event.KeyEvent.wRepeatCount; + + if (ip.Event.KeyEvent.dwControlKeyState & + (LEFT_ALT_PRESSED | RIGHT_ALT_PRESSED)) + { + switch (currentKey.scan) + { + case PCK_ALT_E: /* letter 'E' */ + currentKey.ascii = 0; + break; + } + } else if (ip.Event.KeyEvent.dwControlKeyState & + (LEFT_CTRL_PRESSED | RIGHT_CTRL_PRESSED)) + { + switch (currentKey.scan) + { + case PCK_RIGHT: /* right arrow */ + currentKey.scan = PCK_CTL_RIGHT; + break; + case PCK_LEFT: /* left arrow */ + currentKey.scan = PCK_CTL_LEFT; + break; + case PCK_DELETE: /* delete */ + currentKey.scan = PCK_CTL_DELETE; + break; + } + } + return (TRUE); +} + +/* + * Read a character from the keyboard. + */ + public char +WIN32getch(tty) + int tty; +{ + int ascii; + + if (pending_scancode) + { + pending_scancode = 0; + return ((char)(currentKey.scan & 0x00FF)); + } + + while (win32_kbhit((HANDLE)tty) == FALSE) + { + Sleep(20); + if (ABORT_SIGS()) + return ('\003'); + continue; + } + keyCount --; + ascii = currentKey.ascii; + /* + * On PC's, the extended keys return a 2 byte sequence beginning + * with '00', so if the ascii code is 00, the next byte will be + * the lsb of the scan code. + */ + pending_scancode = (ascii == 0x00); + return ((char)ascii); +} +#endif diff --git a/commands/less/less/search.c b/commands/less/less/search.c new file mode 100644 index 000000000..97f06c8eb --- /dev/null +++ b/commands/less/less/search.c @@ -0,0 +1,1452 @@ +/* $NetBSD: search.c,v 1.10 2006/10/26 01:33:08 mrg Exp $ */ + +/* + * Copyright (C) 1984-2005 Mark Nudelman + * + * You may distribute under the terms of either the GNU General Public + * License or the Less License, as specified in the README file. + * + * For more information about less, or for information on how to + * contact the author, see the README file. + */ + + +/* + * Routines to search a file for a pattern. + */ + +#include "less.h" +#include "position.h" + +#define MINPOS(a,b) (((a) < (b)) ? (a) : (b)) +#define MAXPOS(a,b) (((a) > (b)) ? (a) : (b)) + +#if HAVE_POSIX_REGCOMP +#include +#ifdef REG_EXTENDED +#define REGCOMP_FLAG (more_mode ? 0 : REG_EXTENDED) +#else +#define REGCOMP_FLAG 0 +#endif +#endif +#if HAVE_PCRE +#include +#endif +#if HAVE_RE_COMP +char *re_comp(); +int re_exec(); +#endif +#if HAVE_REGCMP +char *regcmp(); +char *regex(); +extern char *__loc1; +#endif +#if HAVE_V8_REGCOMP +#include "regexp.h" +#endif + + +static void cvt_text __P((char *, char *, int)); +static int is_ucase __P((char *)); +static int prev_pattern __P((void)); +static int compile_pattern __P((char *, int)); +static void uncompile_pattern __P((void)); +static int match_pattern __P((char *, char **, char **, int)); +struct hilite; +static void add_hilite __P((struct hilite *, struct hilite *)); +static void adj_hilite __P((struct hilite *, POSITION, int)); +static void hilite_line __P((POSITION, char *, char *, char *, int)); +static void hilite_screen __P((void)); +static POSITION search_pos __P((int)); +static int search_range __P((POSITION, POSITION, int, int, int, POSITION *, POSITION *)); +static int match __P((char *, char *, char **, char **)); + +extern int sigs; +extern int how_search; +extern int caseless; +extern int linenums; +extern int sc_height; +extern int jump_sline; +extern int bs_mode; +extern int ctldisp; +extern int status_col; +extern int more_mode; +extern POSITION start_attnpos; +extern POSITION end_attnpos; +#if HILITE_SEARCH +extern int hilite_search; +extern int screen_trashed; +extern int size_linebuf; +extern int squished; +extern int can_goto_line; +static int hide_hilite; +static POSITION prep_startpos; +static POSITION prep_endpos; + +struct hilite +{ + struct hilite *hl_next; + POSITION hl_startpos; + POSITION hl_endpos; +}; +static struct hilite hilite_anchor = { NULL, NULL_POSITION, NULL_POSITION }; +#define hl_first hl_next +#endif + +/* + * These are the static variables that represent the "remembered" + * search pattern. + */ +#if HAVE_POSIX_REGCOMP +static regex_t *regpattern = NULL; +#endif +#if HAVE_PCRE +pcre *regpattern = NULL; +#endif +#if HAVE_RE_COMP +int re_pattern = 0; +#endif +#if HAVE_REGCMP +static char *cpattern = NULL; +#endif +#if HAVE_V8_REGCOMP +static struct regexp *regpattern = NULL; +#endif + +static int is_caseless; +static int is_ucase_pattern; +static int last_search_type; +static char *last_pattern = NULL; + +/* + * Convert text. Perform one or more of these transformations: + */ +#define CVT_TO_LC 01 /* Convert upper-case to lower-case */ +#define CVT_BS 02 /* Do backspace processing */ +#define CVT_CRLF 04 /* Remove CR after LF */ +#define CVT_ANSI 010 /* Remove ANSI escape sequences */ + + static void +cvt_text(odst, osrc, ops) + char *odst; + char *osrc; + int ops; +{ + register char *dst; + register char *src; + + for (src = osrc, dst = odst; *src != '\0'; src++) + { + if ((ops & CVT_TO_LC) && IS_UPPER(*src)) + /* Convert uppercase to lowercase. */ + *dst++ = TO_LOWER(*src); + else if ((ops & CVT_BS) && *src == '\b' && dst > odst) + /* Delete BS and preceding char. */ + dst--; + else if ((ops & CVT_ANSI) && *src == ESC) + { + /* Skip to end of ANSI escape sequence. */ + while (src[1] != '\0') + if (!is_ansi_middle(*++src)) + break; + } else + /* Just copy. */ + *dst++ = *src; + } + if ((ops & CVT_CRLF) && dst > odst && dst[-1] == '\r') + dst--; + *dst = '\0'; +} + +/* + * Determine which conversions to perform. + */ + static int +get_cvt_ops() +{ + int ops = 0; + if (is_caseless || bs_mode == BS_SPECIAL) + { + if (is_caseless) + ops |= CVT_TO_LC; + if (bs_mode == BS_SPECIAL) + ops |= CVT_BS; + if (bs_mode != BS_CONTROL) + ops |= CVT_CRLF; + } else if (bs_mode != BS_CONTROL) + { + ops |= CVT_CRLF; + } + if (ctldisp == OPT_ONPLUS) + ops |= CVT_ANSI; + return (ops); +} + +/* + * Are there any uppercase letters in this string? + */ + static int +is_ucase(s) + char *s; +{ + register char *p; + + for (p = s; *p != '\0'; p++) + if (IS_UPPER(*p)) + return (1); + return (0); +} + +/* + * Is there a previous (remembered) search pattern? + */ + static int +prev_pattern() +{ + if (last_search_type & SRCH_NO_REGEX) + return (last_pattern != NULL); +#if HAVE_POSIX_REGCOMP + return (regpattern != NULL); +#endif +#if HAVE_PCRE + return (regpattern != NULL); +#endif +#if HAVE_RE_COMP + return (re_pattern != 0); +#endif +#if HAVE_REGCMP + return (cpattern != NULL); +#endif +#if HAVE_V8_REGCOMP + return (regpattern != NULL); +#endif +#if NO_REGEX + return (last_pattern != NULL); +#endif +} + +#if HILITE_SEARCH +/* + * Repaint the hilites currently displayed on the screen. + * Repaint each line which contains highlighted text. + * If on==0, force all hilites off. + */ + public void +repaint_hilite(on) + int on; +{ + int slinenum; + POSITION pos; + POSITION epos; + int save_hide_hilite; + + if (squished) + repaint(); + + save_hide_hilite = hide_hilite; + if (!on) + { + if (hide_hilite) + return; + hide_hilite = 1; + } + + if (!can_goto_line) + { + repaint(); + hide_hilite = save_hide_hilite; + return; + } + + for (slinenum = TOP; slinenum < TOP + sc_height-1; slinenum++) + { + pos = position(slinenum); + if (pos == NULL_POSITION) + continue; + epos = position(slinenum+1); +#if 0 + /* + * If any character in the line is highlighted, + * repaint the line. + * + * {{ This doesn't work -- if line is drawn with highlights + * which should be erased (e.g. toggle -i with status column), + * we must redraw the line even if it has no highlights. + * For now, just repaint every line. }} + */ + if (is_hilited(pos, epos, 1, NULL)) +#endif + { + (void) forw_line(pos); + goto_line(slinenum); + put_line(); + } + } + hide_hilite = save_hide_hilite; +} + +/* + * Clear the attn hilite. + */ + public void +clear_attn() +{ + int slinenum; + POSITION old_start_attnpos; + POSITION old_end_attnpos; + POSITION pos; + POSITION epos; + + if (start_attnpos == NULL_POSITION) + return; + old_start_attnpos = start_attnpos; + old_end_attnpos = end_attnpos; + start_attnpos = end_attnpos = NULL_POSITION; + + if (!can_goto_line) + { + repaint(); + return; + } + if (squished) + repaint(); + + for (slinenum = TOP; slinenum < TOP + sc_height-1; slinenum++) + { + pos = position(slinenum); + if (pos == NULL_POSITION) + continue; + epos = position(slinenum+1); + if (pos < old_end_attnpos && + (epos == NULL_POSITION || epos > old_start_attnpos)) + { + (void) forw_line(pos); + goto_line(slinenum); + put_line(); + } + } +} +#endif + +/* + * Hide search string highlighting. + */ + public void +undo_search() +{ + if (!prev_pattern()) + { + error("No previous regular expression", NULL_PARG); + return; + } +#if HILITE_SEARCH + hide_hilite = !hide_hilite; + repaint_hilite(1); +#endif +} + +/* + * Compile a search pattern, for future use by match_pattern. + */ + static int +compile_pattern(pattern, search_type) + char *pattern; + int search_type; +{ + if ((search_type & SRCH_NO_REGEX) == 0) + { +#if HAVE_POSIX_REGCOMP + regex_t *s = (regex_t *) ecalloc(1, sizeof(regex_t)); + if (regcomp(s, pattern, REGCOMP_FLAG)) + { + free(s); + error("Invalid pattern", NULL_PARG); + return (-1); + } + if (regpattern != NULL) + regfree(regpattern); + regpattern = s; +#endif +#if HAVE_PCRE + pcre *comp; + const char *errstring; + int erroffset; + PARG parg; + comp = pcre_compile(pattern, 0, + &errstring, &erroffset, NULL); + if (comp == NULL) + { + parg.p_string = (char *) errstring; + error("%s", &parg); + return (-1); + } + regpattern = comp; +#endif +#if HAVE_RE_COMP + PARG parg; + if ((parg.p_string = re_comp(pattern)) != NULL) + { + error("%s", &parg); + return (-1); + } + re_pattern = 1; +#endif +#if HAVE_REGCMP + char *s; + if ((s = regcmp(pattern, 0)) == NULL) + { + error("Invalid pattern", NULL_PARG); + return (-1); + } + if (cpattern != NULL) + free(cpattern); + cpattern = s; +#endif +#if HAVE_V8_REGCOMP + struct regexp *s; + if ((s = regcomp(pattern)) == NULL) + { + /* + * regcomp has already printed an error message + * via regerror(). + */ + return (-1); + } + if (regpattern != NULL) + free(regpattern); + regpattern = s; +#endif + } + + if (last_pattern != NULL) + free(last_pattern); + last_pattern = (char *) calloc(1, strlen(pattern)+1); + if (last_pattern != NULL) + strcpy(last_pattern, pattern); + + last_search_type = search_type; + return (0); +} + +/* + * Forget that we have a compiled pattern. + */ + static void +uncompile_pattern() +{ +#if HAVE_POSIX_REGCOMP + if (regpattern != NULL) + regfree(regpattern); + regpattern = NULL; +#endif +#if HAVE_PCRE + if (regpattern != NULL) + pcre_free(regpattern); + regpattern = NULL; +#endif +#if HAVE_RE_COMP + re_pattern = 0; +#endif +#if HAVE_REGCMP + if (cpattern != NULL) + free(cpattern); + cpattern = NULL; +#endif +#if HAVE_V8_REGCOMP + if (regpattern != NULL) + free(regpattern); + regpattern = NULL; +#endif + last_pattern = NULL; +} + +/* + * Perform a pattern match with the previously compiled pattern. + * Set sp and ep to the start and end of the matched string. + */ + static int +match_pattern(line, sp, ep, notbol) + char *line; + char **sp; + char **ep; + int notbol; +{ + int matched; + + if (last_search_type & SRCH_NO_REGEX) + return (match(last_pattern, line, sp, ep)); + +#if HAVE_POSIX_REGCOMP + { + regmatch_t rm; + int flags = (notbol) ? REG_NOTBOL : 0; + matched = !regexec(regpattern, line, 1, &rm, flags); + if (!matched) + return (0); +#ifndef __WATCOMC__ + *sp = line + rm.rm_so; + *ep = line + rm.rm_eo; +#else + *sp = rm.rm_sp; + *ep = rm.rm_ep; +#endif + } +#endif +#if HAVE_PCRE + { + int flags = (notbol) ? PCRE_NOTBOL : 0; + int ovector[3]; + matched = pcre_exec(regpattern, NULL, line, strlen(line), + 0, flags, ovector, 3) >= 0; + if (!matched) + return (0); + *sp = line + ovector[0]; + *ep = line + ovector[1]; + } +#endif +#if HAVE_RE_COMP + matched = (re_exec(line) == 1); + /* + * re_exec doesn't seem to provide a way to get the matched string. + */ + *sp = *ep = NULL; +#endif +#if HAVE_REGCMP + *ep = regex(cpattern, line); + matched = (*ep != NULL); + if (!matched) + return (0); + *sp = __loc1; +#endif +#if HAVE_V8_REGCOMP +#if HAVE_REGEXEC2 + matched = regexec2(regpattern, line, notbol); +#else + matched = regexec(regpattern, line); +#endif + if (!matched) + return (0); + *sp = regpattern->startp[0]; + *ep = regpattern->endp[0]; +#endif +#if NO_REGEX + matched = match(last_pattern, line, sp, ep); +#endif + return (matched); +} + +#if HILITE_SEARCH +/* + * Clear the hilite list. + */ + public void +clr_hilite() +{ + struct hilite *hl; + struct hilite *nexthl; + + for (hl = hilite_anchor.hl_first; hl != NULL; hl = nexthl) + { + nexthl = hl->hl_next; + free((void*)hl); + } + hilite_anchor.hl_first = NULL; + prep_startpos = prep_endpos = NULL_POSITION; +} + +/* + * Should any characters in a specified range be highlighted? + */ + static int +is_hilited_range(pos, epos) + POSITION pos; + POSITION epos; +{ + struct hilite *hl; + + /* + * Look at each highlight and see if any part of it falls in the range. + */ + for (hl = hilite_anchor.hl_first; hl != NULL; hl = hl->hl_next) + { + if (hl->hl_endpos > pos && + (epos == NULL_POSITION || epos > hl->hl_startpos)) + return (1); + } + return (0); +} + +/* + * Should any characters in a specified range be highlighted? + * If nohide is nonzero, don't consider hide_hilite. + */ + public int +is_hilited(pos, epos, nohide, p_matches) + POSITION pos; + POSITION epos; + int nohide; + int *p_matches; +{ + int match; + + if (p_matches != NULL) + *p_matches = 0; + + if (!status_col && + start_attnpos != NULL_POSITION && + pos < end_attnpos && + (epos == NULL_POSITION || epos > start_attnpos)) + /* + * The attn line overlaps this range. + */ + return (1); + + match = is_hilited_range(pos, epos); + if (!match) + return (0); + + if (p_matches != NULL) + /* + * Report matches, even if we're hiding highlights. + */ + *p_matches = 1; + + if (hilite_search == 0) + /* + * Not doing highlighting. + */ + return (0); + + if (!nohide && hide_hilite) + /* + * Highlighting is hidden. + */ + return (0); + + return (1); +} + +/* + * Add a new hilite to a hilite list. + */ + static void +add_hilite(anchor, hl) + struct hilite *anchor; + struct hilite *hl; +{ + struct hilite *ihl; + + /* + * Hilites are sorted in the list; find where new one belongs. + * Insert new one after ihl. + */ + for (ihl = anchor; ihl->hl_next != NULL; ihl = ihl->hl_next) + { + if (ihl->hl_next->hl_startpos > hl->hl_startpos) + break; + } + + /* + * Truncate hilite so it doesn't overlap any existing ones + * above and below it. + */ + if (ihl != anchor) + hl->hl_startpos = MAXPOS(hl->hl_startpos, ihl->hl_endpos); + if (ihl->hl_next != NULL) + hl->hl_endpos = MINPOS(hl->hl_endpos, ihl->hl_next->hl_startpos); + if (hl->hl_startpos >= hl->hl_endpos) + { + /* + * Hilite was truncated out of existence. + */ + free(hl); + return; + } + hl->hl_next = ihl->hl_next; + ihl->hl_next = hl; +} + + static void +adj_hilite_ansi(cvt_ops, line, npos) + int cvt_ops; + char **line; + POSITION *npos; +{ + if (cvt_ops & CVT_ANSI) + while (**line == ESC) + { + /* + * Found an ESC. The file position moves + * forward past the entire ANSI escape sequence. + */ + (*line)++; + (*npos)++; + while (**line != '\0') + { + (*npos)++; + if (!is_ansi_middle(*(*line)++)) + break; + } + } +} + +/* + * Adjust hl_startpos & hl_endpos to account for backspace processing. + */ + static void +adj_hilite(anchor, linepos, cvt_ops) + struct hilite *anchor; + POSITION linepos; + int cvt_ops; +{ + char *line; + struct hilite *hl; + int checkstart; + POSITION opos; + POSITION npos; + + /* + * The line was already scanned and hilites were added (in hilite_line). + * But it was assumed that each char position in the line + * correponds to one char position in the file. + * This may not be true if there are backspaces in the line. + * Get the raw line again. Look at each character. + */ + (void) forw_raw_line(linepos, &line); + opos = npos = linepos; + hl = anchor->hl_first; + checkstart = TRUE; + while (hl != NULL) + { + /* + * See if we need to adjust the current hl_startpos or + * hl_endpos. After adjusting startpos[i], move to endpos[i]. + * After adjusting endpos[i], move to startpos[i+1]. + * The hilite list must be sorted thus: + * startpos[0] < endpos[0] <= startpos[1] < endpos[1] <= etc. + */ + if (checkstart && hl->hl_startpos == opos) + { + hl->hl_startpos = npos; + checkstart = FALSE; + continue; /* {{ not really necessary }} */ + } else if (!checkstart && hl->hl_endpos == opos) + { + hl->hl_endpos = npos; + checkstart = TRUE; + hl = hl->hl_next; + continue; /* {{ necessary }} */ + } + if (*line == '\0') + break; + adj_hilite_ansi(cvt_ops, &line, &npos); + opos++; + npos++; + line++; + if (cvt_ops & CVT_BS) + { + while (*line == '\b') + { + npos++; + line++; + adj_hilite_ansi(cvt_ops, &line, &npos); + if (*line == '\0') + { + --npos; + --line; + break; + } + /* + * Found a backspace. The file position moves + * forward by 2 relative to the processed line + * which was searched in hilite_line. + */ + npos++; + line++; + } + } + } +} + +/* + * Make a hilite for each string in a physical line which matches + * the current pattern. + * sp,ep delimit the first match already found. + */ + static void +hilite_line(linepos, line, sp, ep, cvt_ops) + POSITION linepos; + char *line; + char *sp; + char *ep; + int cvt_ops; +{ + char *searchp; + struct hilite *hl; + struct hilite hilites; + + if (sp == NULL || ep == NULL) + return; + /* + * sp and ep delimit the first match in the line. + * Mark the corresponding file positions, then + * look for further matches and mark them. + * {{ This technique, of calling match_pattern on subsequent + * substrings of the line, may mark more than is correct + * if the pattern starts with "^". This bug is fixed + * for those regex functions that accept a notbol parameter + * (currently POSIX and V8-with-regexec2). }} + */ + searchp = line; + /* + * Put the hilites into a temporary list until they're adjusted. + */ + hilites.hl_first = NULL; + do { + if (ep > sp) + { + /* + * Assume that each char position in the "line" + * buffer corresponds to one char position in the file. + * This is not quite true; we need to adjust later. + */ + hl = (struct hilite *) ecalloc(1, sizeof(struct hilite)); + hl->hl_startpos = linepos + (sp-line); + hl->hl_endpos = linepos + (ep-line); + add_hilite(&hilites, hl); + } + /* + * If we matched more than zero characters, + * move to the first char after the string we matched. + * If we matched zero, just move to the next char. + */ + if (ep > searchp) + searchp = ep; + else if (*searchp != '\0') + searchp++; + else /* end of line */ + break; + } while (match_pattern(searchp, &sp, &ep, 1)); + + /* + * If there were backspaces in the original line, they + * were removed, and hl_startpos/hl_endpos are not correct. + * {{ This is very ugly. }} + */ + adj_hilite(&hilites, linepos, cvt_ops); + + /* + * Now put the hilites into the real list. + */ + while ((hl = hilites.hl_next) != NULL) + { + hilites.hl_next = hl->hl_next; + add_hilite(&hilite_anchor, hl); + } +} +#endif + +/* + * Change the caseless-ness of searches. + * Updates the internal search state to reflect a change in the -i flag. + */ + public void +chg_caseless() +{ + if (!is_ucase_pattern) + /* + * Pattern did not have uppercase. + * Just set the search caselessness to the global caselessness. + */ + is_caseless = caseless; + else + /* + * Pattern did have uppercase. + * Discard the pattern; we can't change search caselessness now. + */ + uncompile_pattern(); +} + +#if HILITE_SEARCH +/* + * Find matching text which is currently on screen and highlight it. + */ + static void +hilite_screen() +{ + struct scrpos scrpos; + + get_scrpos(&scrpos); + if (scrpos.pos == NULL_POSITION) + return; + prep_hilite(scrpos.pos, position(BOTTOM_PLUS_ONE), -1); + repaint_hilite(1); +} + +/* + * Change highlighting parameters. + */ + public void +chg_hilite() +{ + /* + * Erase any highlights currently on screen. + */ + clr_hilite(); + hide_hilite = 0; + + if (hilite_search == OPT_ONPLUS) + /* + * Display highlights. + */ + hilite_screen(); +} +#endif + +/* + * Figure out where to start a search. + */ + static POSITION +search_pos(search_type) + int search_type; +{ + POSITION pos; + int linenum; + + if (empty_screen()) + { + /* + * Start at the beginning (or end) of the file. + * The empty_screen() case is mainly for + * command line initiated searches; + * for example, "+/xyz" on the command line. + * Also for multi-file (SRCH_PAST_EOF) searches. + */ + if (search_type & SRCH_FORW) + { + return (ch_zero()); + } else + { + pos = ch_length(); + if (pos == NULL_POSITION) + { + (void) ch_end_seek(); + pos = ch_length(); + } + return (pos); + } + } + if (how_search) + { + /* + * Search does not include current screen. + */ + if (search_type & SRCH_FORW) + linenum = BOTTOM_PLUS_ONE; + else + linenum = TOP; + pos = position(linenum); + } else + { + /* + * Search includes current screen. + * It starts at the jump target (if searching backwards), + * or at the jump target plus one (if forwards). + */ + linenum = adjsline(jump_sline); + pos = position(linenum); + if (search_type & SRCH_FORW) + { + pos = forw_raw_line(pos, (char **)NULL); + while (pos == NULL_POSITION) + { + if (++linenum >= sc_height) + break; + pos = position(linenum); + } + } else + { + while (pos == NULL_POSITION) + { + if (--linenum < 0) + break; + pos = position(linenum); + } + } + } + return (pos); +} + +/* + * Search a subset of the file, specified by start/end position. + */ + static int +search_range(pos, endpos, search_type, matches, maxlines, plinepos, pendpos) + POSITION pos; + POSITION endpos; + int search_type; + int matches; + int maxlines; + POSITION *plinepos; + POSITION *pendpos; +{ + char *line; + LINENUM linenum; + char *sp = NULL, *ep = NULL; /* XXX: GCC */ + int line_match; + int cvt_ops; + POSITION linepos, oldpos; + + linenum = find_linenum(pos); + oldpos = pos; + for (;;) + { + /* + * Get lines until we find a matching one or until + * we hit end-of-file (or beginning-of-file if we're + * going backwards), or until we hit the end position. + */ + if (ABORT_SIGS()) + { + /* + * A signal aborts the search. + */ + return (-1); + } + + if ((endpos != NULL_POSITION && pos >= endpos) || maxlines == 0) + { + /* + * Reached end position without a match. + */ + if (pendpos != NULL) + *pendpos = pos; + return (matches); + } + if (maxlines > 0) + maxlines--; + + if (search_type & SRCH_FORW) + { + /* + * Read the next line, and save the + * starting position of that line in linepos. + */ + linepos = pos; + pos = forw_raw_line(pos, &line); + if (linenum != 0) + linenum++; + } else + { + /* + * Read the previous line and save the + * starting position of that line in linepos. + */ + pos = back_raw_line(pos, &line); + linepos = pos; + if (linenum != 0) + linenum--; + } + + if (pos == NULL_POSITION) + { + /* + * Reached EOF/BOF without a match. + */ + if (pendpos != NULL) + *pendpos = oldpos; + return (matches); + } + + /* + * If we're using line numbers, we might as well + * remember the information we have now (the position + * and line number of the current line). + * Don't do it for every line because it slows down + * the search. Remember the line number only if + * we're "far" from the last place we remembered it. + */ + if (linenums && abs((int)(pos - oldpos)) > 1024) + add_lnum(linenum, pos); + oldpos = pos; + + /* + * If it's a caseless search, convert the line to lowercase. + * If we're doing backspace processing, delete backspaces. + */ + cvt_ops = get_cvt_ops(); + cvt_text(line, line, cvt_ops); + + /* + * Test the next line to see if we have a match. + * We are successful if we either want a match and got one, + * or if we want a non-match and got one. + */ + line_match = match_pattern(line, &sp, &ep, 0); + line_match = (!(search_type & SRCH_NO_MATCH) && line_match) || + ((search_type & SRCH_NO_MATCH) && !line_match); + if (!line_match) + continue; + /* + * Got a match. + */ + if (search_type & SRCH_FIND_ALL) + { +#if HILITE_SEARCH + /* + * We are supposed to find all matches in the range. + * Just add the matches in this line to the + * hilite list and keep searching. + */ + if (line_match) + hilite_line(linepos, line, sp, ep, cvt_ops); +#endif + } else if (--matches <= 0) + { + /* + * Found the one match we're looking for. + * Return it. + */ +#if HILITE_SEARCH + if (hilite_search == OPT_ON) + { + /* + * Clear the hilite list and add only + * the matches in this one line. + */ + clr_hilite(); + if (line_match) + hilite_line(linepos, line, sp, ep, cvt_ops); + } +#endif + if (plinepos != NULL) + *plinepos = linepos; + return (0); + } + } +} + +/* + * Search for the n-th occurrence of a specified pattern, + * either forward or backward. + * Return the number of matches not yet found in this file + * (that is, n minus the number of matches found). + * Return -1 if the search should be aborted. + * Caller may continue the search in another file + * if less than n matches are found in this file. + */ + public int +search(search_type, pattern, n) + int search_type; + char *pattern; + int n; +{ + POSITION pos; + int ucase; + + if (pattern == NULL || *pattern == '\0') + { + /* + * A null pattern means use the previously compiled pattern. + */ + if (!prev_pattern()) + { + error("No previous regular expression", NULL_PARG); + return (-1); + } + if ((search_type & SRCH_NO_REGEX) != + (last_search_type & SRCH_NO_REGEX)) + { + error("Please re-enter search pattern", NULL_PARG); + return -1; + } +#if HILITE_SEARCH + if (hilite_search == OPT_ON) + { + /* + * Erase the highlights currently on screen. + * If the search fails, we'll redisplay them later. + */ + repaint_hilite(0); + } + if (hilite_search == OPT_ONPLUS && hide_hilite) + { + /* + * Highlight any matches currently on screen, + * before we actually start the search. + */ + hide_hilite = 0; + hilite_screen(); + } + hide_hilite = 0; +#endif + } else + { + /* + * Compile the pattern. + */ + ucase = is_ucase(pattern); + if (caseless == OPT_ONPLUS) + cvt_text(pattern, pattern, CVT_TO_LC); + if (compile_pattern(pattern, search_type) < 0) + return (-1); + /* + * Ignore case if -I is set OR + * -i is set AND the pattern is all lowercase. + */ + is_ucase_pattern = ucase; + if (is_ucase_pattern && caseless != OPT_ONPLUS) + is_caseless = 0; + else + is_caseless = caseless; +#if HILITE_SEARCH + if (hilite_search) + { + /* + * Erase the highlights currently on screen. + * Also permanently delete them from the hilite list. + */ + repaint_hilite(0); + hide_hilite = 0; + clr_hilite(); + } + if (hilite_search == OPT_ONPLUS) + { + /* + * Highlight any matches currently on screen, + * before we actually start the search. + */ + hilite_screen(); + } +#endif + } + + /* + * Figure out where to start the search. + */ + pos = search_pos(search_type); + if (pos == NULL_POSITION) + { + /* + * Can't find anyplace to start searching from. + */ + if (search_type & SRCH_PAST_EOF) + return (n); + /* repaint(); -- why was this here? */ + error("Nothing to search", NULL_PARG); + return (-1); + } + + n = search_range(pos, NULL_POSITION, search_type, n, -1, + &pos, (POSITION*)NULL); + if (n != 0) + { + /* + * Search was unsuccessful. + */ +#if HILITE_SEARCH + if (hilite_search == OPT_ON && n > 0) + /* + * Redisplay old hilites. + */ + repaint_hilite(1); +#endif + return (n); + } + + if (!(search_type & SRCH_NO_MOVE)) + { + /* + * Go to the matching line. + */ + jump_loc(pos, jump_sline); + } + +#if HILITE_SEARCH + if (hilite_search == OPT_ON) + /* + * Display new hilites in the matching line. + */ + repaint_hilite(1); +#endif + return (0); +} + + +#if HILITE_SEARCH +/* + * Prepare hilites in a given range of the file. + * + * The pair (prep_startpos,prep_endpos) delimits a contiguous region + * of the file that has been "prepared"; that is, scanned for matches for + * the current search pattern, and hilites have been created for such matches. + * If prep_startpos == NULL_POSITION, the prep region is empty. + * If prep_endpos == NULL_POSITION, the prep region extends to EOF. + * prep_hilite asks that the range (spos,epos) be covered by the prep region. + */ + public void +prep_hilite(spos, epos, maxlines) + POSITION spos; + POSITION epos; + int maxlines; +{ + POSITION nprep_startpos = prep_startpos; + POSITION nprep_endpos = prep_endpos; + POSITION new_epos; + POSITION max_epos; + int result; + int i; +/* + * Search beyond where we're asked to search, so the prep region covers + * more than we need. Do one big search instead of a bunch of small ones. + */ +#define SEARCH_MORE (3*size_linebuf) + + if (!prev_pattern()) + return; + + /* + * If we're limited to a max number of lines, figure out the + * file position we should stop at. + */ + if (maxlines < 0) + max_epos = NULL_POSITION; + else + { + max_epos = spos; + for (i = 0; i < maxlines; i++) + max_epos = forw_raw_line(max_epos, (char **)NULL); + } + + /* + * Find two ranges: + * The range that we need to search (spos,epos); and the range that + * the "prep" region will then cover (nprep_startpos,nprep_endpos). + */ + + if (prep_startpos == NULL_POSITION || + (epos != NULL_POSITION && epos < prep_startpos) || + spos > prep_endpos) + { + /* + * New range is not contiguous with old prep region. + * Discard the old prep region and start a new one. + */ + clr_hilite(); + if (epos != NULL_POSITION) + epos += SEARCH_MORE; + nprep_startpos = spos; + } else + { + /* + * New range partially or completely overlaps old prep region. + */ + if (epos == NULL_POSITION) + { + /* + * New range goes to end of file. + */ + ; + } else if (epos > prep_endpos) + { + /* + * New range ends after old prep region. + * Extend prep region to end at end of new range. + */ + epos += SEARCH_MORE; + } else /* (epos <= prep_endpos) */ + { + /* + * New range ends within old prep region. + * Truncate search to end at start of old prep region. + */ + epos = prep_startpos; + } + + if (spos < prep_startpos) + { + /* + * New range starts before old prep region. + * Extend old prep region backwards to start at + * start of new range. + */ + if (spos < SEARCH_MORE) + spos = 0; + else + spos -= SEARCH_MORE; + nprep_startpos = spos; + } else /* (spos >= prep_startpos) */ + { + /* + * New range starts within or after old prep region. + * Trim search to start at end of old prep region. + */ + spos = prep_endpos; + } + } + + if (epos != NULL_POSITION && max_epos != NULL_POSITION && + epos > max_epos) + /* + * Don't go past the max position we're allowed. + */ + epos = max_epos; + + if (epos == NULL_POSITION || epos > spos) + { + result = search_range(spos, epos, SRCH_FORW|SRCH_FIND_ALL, 0, + maxlines, (POSITION*)NULL, &new_epos); + if (result < 0) + return; + if (prep_endpos == NULL_POSITION || new_epos > prep_endpos) + nprep_endpos = new_epos; + } + prep_startpos = nprep_startpos; + prep_endpos = nprep_endpos; +} +#endif + +/* + * Simple pattern matching function. + * It supports no metacharacters like *, etc. + */ + static int +match(pattern, buf, pfound, pend) + char *pattern, *buf; + char **pfound, **pend; +{ + register char *pp, *lp; + + for ( ; *buf != '\0'; buf++) + { + for (pp = pattern, lp = buf; *pp == *lp; pp++, lp++) + if (*pp == '\0' || *lp == '\0') + break; + if (*pp == '\0') + { + if (pfound != NULL) + *pfound = buf; + if (pend != NULL) + *pend = lp; + return (1); + } + } + return (0); +} + +#if HAVE_V8_REGCOMP +/* + * This function is called by the V8 regcomp to report + * errors in regular expressions. + */ + void +regerror(s) + char *s; +{ + PARG parg; + + parg.p_string = s; + error("%s", &parg); +} +#endif + diff --git a/commands/less/less/signal.c b/commands/less/less/signal.c new file mode 100644 index 000000000..28ea8850d --- /dev/null +++ b/commands/less/less/signal.c @@ -0,0 +1,281 @@ +/* $NetBSD: signal.c,v 1.6 2006/10/26 01:33:08 mrg Exp $ */ + +/* + * Copyright (C) 1984-2004 Mark Nudelman + * + * You may distribute under the terms of either the GNU General Public + * License or the Less License, as specified in the README file. + * + * For more information about less, or for information on how to + * contact the author, see the README file. + */ + + +/* + * Routines dealing with signals. + * + * A signal usually merely causes a bit to be set in the "signals" word. + * At some convenient time, the mainline code checks to see if any + * signals need processing by calling psignal(). + * If we happen to be reading from a file [in iread()] at the time + * the signal is received, we call intread to interrupt the iread. + */ + +#include "less.h" +#include + +/* + * "sigs" contains bits indicating signals which need to be processed. + */ +public int sigs; + +static RETSIGTYPE u_interrupt __P((int)); +static RETSIGTYPE stop __P((int)); +#if MSDOS_COMPILER==WIN32C +static BOOL WINAPI wbreak_handler __P((DWORD)); +#endif + +extern int sc_width, sc_height; +extern int screen_trashed; +extern int lnloop; +extern int linenums; +extern int wscroll; +extern int reading; +extern int quit_on_intr; + +/* + * Interrupt signal handler. + */ + /* ARGSUSED*/ + static RETSIGTYPE +u_interrupt(type) + int type; +{ +#if OS2 + LSIGNAL(SIGINT, SIG_ACK); +#endif + LSIGNAL(SIGINT, u_interrupt); + sigs |= S_INTERRUPT; +#if MSDOS_COMPILER==DJGPPC + /* + * If a keyboard has been hit, it must be Ctrl-C + * (as opposed to Ctrl-Break), so consume it. + * (Otherwise, Less will beep when it sees Ctrl-C from keyboard.) + */ + if (kbhit()) + getkey(); +#endif + if (reading) + intread(); +} + +#ifdef SIGTSTP +/* + * "Stop" (^Z) signal handler. + */ + /* ARGSUSED*/ + static RETSIGTYPE +stop(type) + int type; +{ + LSIGNAL(SIGTSTP, stop); + sigs |= S_STOP; + if (reading) + intread(); +} +#endif + +#ifdef SIGWINCH +/* + * "Window" change handler + */ + /* ARGSUSED*/ + public RETSIGTYPE +winch(type) + int type; +{ + LSIGNAL(SIGWINCH, winch); + sigs |= S_WINCH; + if (reading) + intread(); +} +#else +#ifdef SIGWIND +/* + * "Window" change handler + */ + /* ARGSUSED*/ + public RETSIGTYPE +winch(type) + int type; +{ + LSIGNAL(SIGWIND, winch); + sigs |= S_WINCH; + if (reading) + intread(); +} +#endif +#endif + +#if MSDOS_COMPILER==WIN32C +/* + * Handle CTRL-C and CTRL-BREAK keys. + */ +#include "windows.h" + + static BOOL WINAPI +wbreak_handler(dwCtrlType) + DWORD dwCtrlType; +{ + switch (dwCtrlType) + { + case CTRL_C_EVENT: + case CTRL_BREAK_EVENT: + sigs |= S_INTERRUPT; + return (TRUE); + default: + break; + } + return (FALSE); +} +#endif + +/* + * Set up the signal handlers. + */ + public void +init_signals(on) + int on; +{ + if (on) + { + /* + * Set signal handlers. + */ + (void) LSIGNAL(SIGINT, u_interrupt); +#if MSDOS_COMPILER==WIN32C + SetConsoleCtrlHandler(wbreak_handler, TRUE); +#endif +#ifdef SIGTSTP + (void) LSIGNAL(SIGTSTP, stop); +#endif +#ifdef SIGWINCH + (void) LSIGNAL(SIGWINCH, winch); +#else +#ifdef SIGWIND + (void) LSIGNAL(SIGWIND, winch); +#endif +#ifdef SIGQUIT + (void) LSIGNAL(SIGQUIT, SIG_IGN); +#endif +#endif + } else + { + /* + * Restore signals to defaults. + */ + (void) LSIGNAL(SIGINT, SIG_DFL); +#if MSDOS_COMPILER==WIN32C + SetConsoleCtrlHandler(wbreak_handler, FALSE); +#endif +#ifdef SIGTSTP + (void) LSIGNAL(SIGTSTP, SIG_DFL); +#endif +#ifdef SIGWINCH + (void) LSIGNAL(SIGWINCH, SIG_IGN); +#endif +#ifdef SIGWIND + (void) LSIGNAL(SIGWIND, SIG_IGN); +#endif +#ifdef SIGQUIT + (void) LSIGNAL(SIGQUIT, SIG_DFL); +#endif + } +} + +/* + * Process any signals we have received. + * A received signal cause a bit to be set in "sigs". + */ + public void +psignals() +{ + register int tsignals; + + if ((tsignals = sigs) == 0) + return; + sigs = 0; + +#ifdef SIGTSTP + if (tsignals & S_STOP) + { + /* + * Clean up the terminal. + */ +#ifdef SIGTTOU + LSIGNAL(SIGTTOU, SIG_IGN); +#endif + clear_bot(); + deinit(); + flush(); + raw_mode(0); +#ifdef SIGTTOU + LSIGNAL(SIGTTOU, SIG_DFL); +#endif + LSIGNAL(SIGTSTP, SIG_DFL); + kill(getpid(), SIGTSTP); + /* + * ... Bye bye. ... + * Hopefully we'll be back later and resume here... + * Reset the terminal and arrange to repaint the + * screen when we get back to the main command loop. + */ + LSIGNAL(SIGTSTP, stop); + raw_mode(1); + init(); + screen_trashed = 1; + tsignals |= S_WINCH; + } +#endif +#ifdef S_WINCH + if (tsignals & S_WINCH) + { + int old_width, old_height; + /* + * Re-execute scrsize() to read the new window size. + */ + old_width = sc_width; + old_height = sc_height; + get_term(); + if (sc_width != old_width || sc_height != old_height) + { + wscroll = (sc_height + 1) / 2; + screen_trashed = 1; + } + } +#endif + if (tsignals & S_INTERRUPT) + { + if (quit_on_intr) + quit(QUIT_OK); + bell(); + /* + * {{ You may wish to replace the bell() with + * error("Interrupt", NULL_PARG); }} + */ + + /* + * If we were interrupted while in the "calculating + * line numbers" loop, turn off line numbers. + */ + if (lnloop) + { + lnloop = 0; + if (linenums == 2) + screen_trashed = 1; + linenums = 0; + error("Line numbers turned off", NULL_PARG); + } + + } +} diff --git a/commands/less/less/tags.c b/commands/less/less/tags.c new file mode 100644 index 000000000..2e7c7663c --- /dev/null +++ b/commands/less/less/tags.c @@ -0,0 +1,759 @@ +/* $NetBSD: tags.c,v 1.8 2006/10/26 01:33:08 mrg Exp $ */ + +/* + * Copyright (C) 1984-2004 Mark Nudelman + * + * You may distribute under the terms of either the GNU General Public + * License or the Less License, as specified in the README file. + * + * For more information about less, or for information on how to + * contact the author, see the README file. + */ + + +#include "less.h" + +#define WHITESP(c) ((c)==' ' || (c)=='\t') + +#if TAGS + +public char *tags = "tags"; + +static int total; +static int curseq; + +extern int linenums; +extern int sigs; + +enum tag_result { + TAG_FOUND, + TAG_NOFILE, + TAG_NOTAG, + TAG_NOTYPE, + TAG_INTR +}; + +/* + * Tag type + */ +enum { + T_CTAGS, /* 'tags': standard and extended format (ctags) */ + T_CTAGS_X, /* stdin: cross reference format (ctags) */ + T_GTAGS, /* 'GTAGS': function defenition (global) */ + T_GRTAGS, /* 'GRTAGS': function reference (global) */ + T_GSYMS, /* 'GSYMS': other symbols (global) */ + T_GPATH /* 'GPATH': path name (global) */ +}; + +static enum tag_result findctag(); +static enum tag_result findgtag(); +static char *nextgtag(); +static char *prevgtag(); +static POSITION ctagsearch(); +static POSITION gtagsearch(); +static int getentry(); + +/* + * The list of tags generated by the last findgtag() call. + * + * Use either pattern or line number. + * findgtag() always uses line number, so pattern is always NULL. + * findctag() usually either pattern (in which case line number is 0), + * or line number (in which case pattern is NULL). + */ +struct tag { + struct tag *next, *prev; /* List links */ + char *tag_file; /* Source file containing the tag */ + LINENUM tag_linenum; /* Appropriate line number in source file */ + char *tag_pattern; /* Pattern used to find the tag */ + char tag_endline; /* True if the pattern includes '$' */ +}; +struct taglist { + struct tag *tl_first; + struct tag *tl_last; +}; +#define TAG_END ((struct tag *) &taglist) +static struct taglist taglist = { TAG_END, TAG_END }; +static struct tag *curtag; + +#define TAG_INS(tp) \ + (tp)->next = taglist.tl_first; \ + (tp)->prev = TAG_END; \ + taglist.tl_first->prev = (tp); \ + taglist.tl_first = (tp); + +#define TAG_RM(tp) \ + (tp)->next->prev = (tp)->prev; \ + (tp)->prev->next = (tp)->next; + +/* + * Delete tag structures. + */ + public void +cleantags() +{ + register struct tag *tp; + + /* + * Delete any existing tag list. + * {{ Ideally, we wouldn't do this until after we know that we + * can load some other tag information. }} + */ + while ((tp = taglist.tl_first) != TAG_END) + { + TAG_RM(tp); + free(tp); + } + curtag = NULL; + total = curseq = 0; +} + +/* + * Create a new tag entry. + */ + static struct tag * +maketagent(name, file, linenum, pattern, endline) + char *name; + char *file; + LINENUM linenum; + char *pattern; + int endline; +{ + register struct tag *tp; + + tp = (struct tag *) ecalloc(sizeof(struct tag), 1); + tp->tag_file = (char *) ecalloc(strlen(file) + 1, sizeof(char)); + strcpy(tp->tag_file, file); + tp->tag_linenum = linenum; + tp->tag_endline = endline; + if (pattern == NULL) + tp->tag_pattern = NULL; + else + { + tp->tag_pattern = (char *) ecalloc(strlen(pattern) + 1, sizeof(char)); + strcpy(tp->tag_pattern, pattern); + } + return (tp); +} + +/* + * Get tag mode. + */ + public int +gettagtype() +{ + int f; + + if (strcmp(tags, "GTAGS") == 0) + return T_GTAGS; + if (strcmp(tags, "GRTAGS") == 0) + return T_GRTAGS; + if (strcmp(tags, "GSYMS") == 0) + return T_GSYMS; + if (strcmp(tags, "GPATH") == 0) + return T_GPATH; + if (strcmp(tags, "-") == 0) + return T_CTAGS_X; + f = open(tags, OPEN_READ); + if (f >= 0) + { + close(f); + return T_CTAGS; + } + return T_GTAGS; +} + +/* + * Find tags in tag file. + * Find a tag in the "tags" file. + * Sets "tag_file" to the name of the file containing the tag, + * and "tagpattern" to the search pattern which should be used + * to find the tag. + */ + public void +findtag(tag) + register char *tag; +{ + int type = gettagtype(); + enum tag_result result; + + if (type == T_CTAGS) + result = findctag(tag); + else + result = findgtag(tag, type); + switch (result) + { + case TAG_FOUND: + case TAG_INTR: + break; + case TAG_NOFILE: + error("No tags file", NULL_PARG); + break; + case TAG_NOTAG: + error("No such tag in tags file", NULL_PARG); + break; + case TAG_NOTYPE: + error("unknown tag type", NULL_PARG); + break; + } +} + +/* + * Search for a tag. + */ + public POSITION +tagsearch() +{ + if (curtag == NULL) + return (NULL_POSITION); /* No gtags loaded! */ + if (curtag->tag_linenum != 0) + return gtagsearch(); + else + return ctagsearch(); +} + +/* + * Go to the next tag. + */ + public char * +nexttag(n) + int n; +{ + char *tagfile = (char *) NULL; + + while (n-- > 0) + tagfile = nextgtag(); + return tagfile; +} + +/* + * Go to the previous tag. + */ + public char * +prevtag(n) + int n; +{ + char *tagfile = (char *) NULL; + + while (n-- > 0) + tagfile = prevgtag(); + return tagfile; +} + +/* + * Return the total number of tags. + */ + public int +ntags() +{ + return total; +} + +/* + * Return the sequence number of current tag. + */ + public int +curr_tag() +{ + return curseq; +} + +/***************************************************************************** + * ctags + */ + +/* + * Find tags in the "tags" file. + * Sets curtag to the first tag entry. + */ + static enum tag_result +findctag(tag) + register char *tag; +{ + char *p; + register FILE *f; + register int taglen; + LINENUM taglinenum; + char *tagfile; + char *tagpattern; + int tagendline; + int search_char; + int err; + char tline[TAGLINE_SIZE]; + struct tag *tp; + + p = shell_unquote(tags); + f = fopen(p, "r"); + free(p); + if (f == NULL) + return TAG_NOFILE; + + cleantags(); + total = 0; + taglen = strlen(tag); + + /* + * Search the tags file for the desired tag. + */ + while (fgets(tline, sizeof(tline), f) != NULL) + { + if (tline[0] == '!') + /* Skip header of extended format. */ + continue; + if (strncmp(tag, tline, taglen) != 0 || !WHITESP(tline[taglen])) + continue; + + /* + * Found it. + * The line contains the tag, the filename and the + * location in the file, separated by white space. + * The location is either a decimal line number, + * or a search pattern surrounded by a pair of delimiters. + * Parse the line and extract these parts. + */ + tagpattern = NULL; + + /* + * Skip over the whitespace after the tag name. + */ + p = skipsp(tline+taglen); + if (*p == '\0') + /* File name is missing! */ + continue; + + /* + * Save the file name. + * Skip over the whitespace after the file name. + */ + tagfile = p; + while (!WHITESP(*p) && *p != '\0') + p++; + *p++ = '\0'; + p = skipsp(p); + if (*p == '\0') + /* Pattern is missing! */ + continue; + + /* + * First see if it is a line number. + */ + tagendline = 0; + taglinenum = getnum(&p, 0, &err); + if (err) + { + /* + * No, it must be a pattern. + * Delete the initial "^" (if present) and + * the final "$" from the pattern. + * Delete any backslash in the pattern. + */ + taglinenum = 0; + search_char = *p++; + if (*p == '^') + p++; + tagpattern = p; + while (*p != search_char && *p != '\0') + { + if (*p == '\\') + p++; + p++; + } + tagendline = (p[-1] == '$'); + if (tagendline) + p--; + *p = '\0'; + } + tp = maketagent(tag, tagfile, taglinenum, tagpattern, tagendline); + TAG_INS(tp); + total++; + } + fclose(f); + if (total == 0) + return TAG_NOTAG; + curtag = taglist.tl_first; + curseq = 1; + return TAG_FOUND; +} + +/* + * Edit current tagged file. + */ + public int +edit_tagfile() +{ + if (curtag == NULL) + return (1); + return (edit(curtag->tag_file)); +} + +/* + * Search for a tag. + * This is a stripped-down version of search(). + * We don't use search() for several reasons: + * - We don't want to blow away any search string we may have saved. + * - The various regular-expression functions (from different systems: + * regcmp vs. re_comp) behave differently in the presence of + * parentheses (which are almost always found in a tag). + */ + static POSITION +ctagsearch() +{ + POSITION pos, linepos; + LINENUM linenum; + int len; + char *line; + + pos = ch_zero(); + linenum = find_linenum(pos); + + for (;;) + { + /* + * Get lines until we find a matching one or + * until we hit end-of-file. + */ + if (ABORT_SIGS()) + return (NULL_POSITION); + + /* + * Read the next line, and save the + * starting position of that line in linepos. + */ + linepos = pos; + pos = forw_raw_line(pos, &line); + if (linenum != 0) + linenum++; + + if (pos == NULL_POSITION) + { + /* + * We hit EOF without a match. + */ + error("Tag not found", NULL_PARG); + return (NULL_POSITION); + } + + /* + * If we're using line numbers, we might as well + * remember the information we have now (the position + * and line number of the current line). + */ + if (linenums) + add_lnum(linenum, pos); + + /* + * Test the line to see if we have a match. + * Use strncmp because the pattern may be + * truncated (in the tags file) if it is too long. + * If tagendline is set, make sure we match all + * the way to end of line (no extra chars after the match). + */ + len = strlen(curtag->tag_pattern); + if (strncmp(curtag->tag_pattern, line, len) == 0 && + (!curtag->tag_endline || line[len] == '\0' || line[len] == '\r')) + { + curtag->tag_linenum = find_linenum(linepos); + break; + } + } + + return (linepos); +} + +/******************************************************************************* + * gtags + */ + +/* + * Find tags in the GLOBAL's tag file. + * The findgtag() will try and load information about the requested tag. + * It does this by calling "global -x tag" and storing the parsed output + * for future use by gtagsearch(). + * Sets curtag to the first tag entry. + */ + static enum tag_result +findgtag(tag, type) + char *tag; /* tag to load */ + int type; /* tags type */ +{ + char buf[256]; + FILE *fp; + struct tag *tp; + + if (type != T_CTAGS_X && tag == NULL) + return TAG_NOFILE; + + cleantags(); + total = 0; + + /* + * If type == T_CTAGS_X then read ctags's -x format from stdin + * else execute global(1) and read from it. + */ + if (type == T_CTAGS_X) + { + fp = stdin; + /* Set tag default because we cannot read stdin again. */ + tags = "tags"; + } else + { +#if !HAVE_POPEN + return TAG_NOFILE; +#else + char *command; + char *flag; + char *qtag; + char *cmd = lgetenv("LESSGLOBALTAGS"); + + if (cmd == NULL || *cmd == '\0') + return TAG_NOFILE; + /* Get suitable flag value for global(1). */ + switch (type) + { + case T_GTAGS: + flag = "" ; + break; + case T_GRTAGS: + flag = "r"; + break; + case T_GSYMS: + flag = "s"; + break; + case T_GPATH: + flag = "P"; + break; + default: + return TAG_NOTYPE; + } + + /* Get our data from global(1). */ + qtag = shell_quote(tag); + if (qtag == NULL) + qtag = tag; + command = (char *) ecalloc(strlen(cmd) + strlen(flag) + + strlen(qtag) + 5, sizeof(char)); + sprintf(command, "%s -x%s %s", cmd, flag, qtag); + if (qtag != tag) + free(qtag); + fp = popen(command, "r"); + free(command); +#endif + } + if (fp != NULL) + { + while (fgets(buf, sizeof(buf), fp)) + { + char *name, *file, *line; + size_t len; + + if (sigs) + { +#if HAVE_POPEN + if (fp != stdin) + pclose(fp); +#endif + return TAG_INTR; + } + len = strlen(buf); + if (len > 0 && buf[len-1] == '\n') + buf[len-1] = '\0'; + else + { + int c; + do { + c = fgetc(fp); + } while (c != '\n' && c != EOF); + } + + if (getentry(buf, &name, &file, &line)) + { + /* + * Couldn't parse this line for some reason. + * We'll just pretend it never happened. + */ + break; + } + + /* Make new entry and add to list. */ + tp = maketagent(name, file, (LINENUM) atoi(line), NULL, 0); + TAG_INS(tp); + total++; + } + if (fp != stdin) + { + if (pclose(fp)) + { + curtag = NULL; + total = curseq = 0; + return TAG_NOFILE; + } + } + } + + /* Check to see if we found anything. */ + tp = taglist.tl_first; + if (tp == TAG_END) + return TAG_NOTAG; + curtag = tp; + curseq = 1; + return TAG_FOUND; +} + +static int circular = 0; /* 1: circular tag structure */ + +/* + * Return the filename required for the next gtag in the queue that was setup + * by findgtag(). The next call to gtagsearch() will try to position at the + * appropriate tag. + */ + static char * +nextgtag() +{ + struct tag *tp; + + if (curtag == NULL) + /* No tag loaded */ + return NULL; + + tp = curtag->next; + if (tp == TAG_END) + { + if (!circular) + return NULL; + /* Wrapped around to the head of the queue */ + curtag = taglist.tl_first; + curseq = 1; + } else + { + curtag = tp; + curseq++; + } + return (curtag->tag_file); +} + +/* + * Return the filename required for the previous gtag in the queue that was + * setup by findgtat(). The next call to gtagsearch() will try to position + * at the appropriate tag. + */ + static char * +prevgtag() +{ + struct tag *tp; + + if (curtag == NULL) + /* No tag loaded */ + return NULL; + + tp = curtag->prev; + if (tp == TAG_END) + { + if (!circular) + return NULL; + /* Wrapped around to the tail of the queue */ + curtag = taglist.tl_last; + curseq = total; + } else + { + curtag = tp; + curseq--; + } + return (curtag->tag_file); +} + +/* + * Position the current file at at what is hopefully the tag that was chosen + * using either findtag() or one of nextgtag() and prevgtag(). Returns -1 + * if it was unable to position at the tag, 0 if successful. + */ + static POSITION +gtagsearch() +{ + if (curtag == NULL) + return (NULL_POSITION); /* No gtags loaded! */ + return (find_pos(curtag->tag_linenum)); +} + +/* + * The getentry() parses both standard and extended ctags -x format. + * + * [standard format] + * + * +------------------------------------------------ + * |main 30 main.c main(argc, argv) + * |func 21 subr.c func(arg) + * + * The following commands write this format. + * o Traditinal Ctags with -x option + * o Global with -x option + * See + * + * [extended format] + * + * +---------------------------------------------------------- + * |main function 30 main.c main(argc, argv) + * |func function 21 subr.c func(arg) + * + * The following commands write this format. + * o Exuberant Ctags with -x option + * See + * + * Returns 0 on success, -1 on error. + * The tag, file, and line will each be NUL-terminated pointers + * into buf. + */ + static int +getentry(buf, tag, file, line) + char *buf; /* standard or extended ctags -x format data */ + char **tag; /* name of the tag we actually found */ + char **file; /* file in which to find this tag */ + char **line; /* line number of file where this tag is found */ +{ + char *p = buf; + + for (*tag = p; *p && !IS_SPACE(*p); p++) /* tag name */ + ; + if (*p == 0) + return (-1); + *p++ = 0; + for ( ; *p && IS_SPACE(*p); p++) /* (skip blanks) */ + ; + if (*p == 0) + return (-1); + /* + * If the second part begin with other than digit, + * it is assumed tag type. Skip it. + */ + if (!IS_DIGIT(*p)) + { + for ( ; *p && !IS_SPACE(*p); p++) /* (skip tag type) */ + ; + for (; *p && IS_SPACE(*p); p++) /* (skip blanks) */ + ; + } + if (!IS_DIGIT(*p)) + return (-1); + *line = p; /* line number */ + for (*line = p; *p && !IS_SPACE(*p); p++) + ; + if (*p == 0) + return (-1); + *p++ = 0; + for ( ; *p && IS_SPACE(*p); p++) /* (skip blanks) */ + ; + if (*p == 0) + return (-1); + *file = p; /* file name */ + for (*file = p; *p && !IS_SPACE(*p); p++) + ; + if (*p == 0) + return (-1); + *p = 0; + + /* value check */ + if (strlen(*tag) && strlen(*line) && strlen(*file) && atoi(*line) > 0) + return (0); + return (-1); +} + +#endif diff --git a/commands/less/less/ttyin.c b/commands/less/less/ttyin.c new file mode 100644 index 000000000..c1934ee7d --- /dev/null +++ b/commands/less/less/ttyin.c @@ -0,0 +1,178 @@ +/* + * Copyright (C) 1984-2004 Mark Nudelman + * + * You may distribute under the terms of either the GNU General Public + * License or the Less License, as specified in the README file. + * + * For more information about less, or for information on how to + * contact the author, see the README file. + */ + + +/* + * Routines dealing with getting input from the keyboard (i.e. from the user). + */ + +#include "less.h" +#if OS2 +#include "cmd.h" +#include "pckeys.h" +#endif +#if MSDOS_COMPILER==WIN32C +#include "windows.h" +extern char WIN32getch(); +static DWORD console_mode; +#endif + +public int tty; +extern int sigs; +extern int utf_mode; + +/* + * Open keyboard for input. + */ + public void +open_getchr() +{ +#if MSDOS_COMPILER==WIN32C + /* Need this to let child processes inherit our console handle */ + SECURITY_ATTRIBUTES sa; + memset(&sa, 0, sizeof(SECURITY_ATTRIBUTES)); + sa.nLength = sizeof(SECURITY_ATTRIBUTES); + sa.bInheritHandle = TRUE; + tty = (int) CreateFile("CONIN$", GENERIC_READ, + FILE_SHARE_READ, &sa, + OPEN_EXISTING, 0L, NULL); + GetConsoleMode((HANDLE)tty, &console_mode); + /* Make sure we get Ctrl+C events. */ + SetConsoleMode((HANDLE)tty, ENABLE_PROCESSED_INPUT); +#else +#if MSDOS_COMPILER + extern int fd0; + /* + * Open a new handle to CON: in binary mode + * for unbuffered keyboard read. + */ + fd0 = dup(0); + close(0); + tty = open("CON", OPEN_READ); +#if MSDOS_COMPILER==DJGPPC + /* + * Setting stdin to binary causes Ctrl-C to not + * raise SIGINT. We must undo that side-effect. + */ + (void) __djgpp_set_ctrl_c(1); +#endif +#else + /* + * Try /dev/tty. + * If that doesn't work, use file descriptor 2, + * which in Unix is usually attached to the screen, + * but also usually lets you read from the keyboard. + */ +#if OS2 + /* The __open() system call translates "/dev/tty" to "con". */ + tty = __open("/dev/tty", OPEN_READ); +#else + tty = open("/dev/tty", OPEN_READ); +#endif + if (tty < 0) + tty = 2; +#endif +#endif +} + +/* + * Close the keyboard. + */ + public void +close_getchr() +{ +#if MSDOS_COMPILER==WIN32C + SetConsoleMode((HANDLE)tty, console_mode); + CloseHandle((HANDLE)tty); +#endif +} + +/* + * Get a character from the keyboard. + */ + public int +getchr() +{ + char c; + int result; +#if 0 + int hex_in = 0; + int hex_value = 0; +#endif + + do + { +#if MSDOS_COMPILER && MSDOS_COMPILER != DJGPPC + /* + * In raw read, we don't see ^C so look here for it. + */ + flush(); +#if MSDOS_COMPILER==WIN32C + if (ABORT_SIGS()) + return (READ_INTR); + c = WIN32getch(tty); +#else + c = getch(); +#endif + result = 1; + if (c == '\003') + return (READ_INTR); +#else + result = iread(tty, &c, sizeof(char)); + if (result == READ_INTR) + return (READ_INTR); + if (result < 0) + { + /* + * Don't call error() here, + * because error calls getchr! + */ + quit(QUIT_ERROR); + } +#endif +#if 0 /* allow entering arbitrary hex chars for testing */ + /* ctrl-A followed by two hex chars makes a byte */ + if (c == CONTROL('A')) + { + hex_in = 2; + result = 0; + continue; + } + if (hex_in > 0) + { + int v; + if (c >= '0' && c <= '9') + v = c - '0'; + else if (c >= 'a' && c <= 'f') + v = c - 'a' + 10; + else if (c >= 'A' && c <= 'F') + v = c - 'A' + 10; + else + hex_in = 0; + hex_value = (hex_value << 4) | v; + if (--hex_in > 0) + { + result = 0; + continue; + } + c = hex_value; + } +#endif + /* + * Various parts of the program cannot handle + * an input character of '\0'. + * If a '\0' was actually typed, convert it to '\340' here. + */ + if (c == '\0') + c = '\340'; + } while (result != 1); + + return (c & 0xFF); +} diff --git a/commands/less/less/version.c b/commands/less/less/version.c new file mode 100644 index 000000000..84e01a444 --- /dev/null +++ b/commands/less/less/version.c @@ -0,0 +1,675 @@ +/* $NetBSD: version.c,v 1.6 2006/10/26 01:33:08 mrg Exp $ */ + +/* + * Copyright (C) 1984-2005 Mark Nudelman + * + * You may distribute under the terms of either the GNU General Public + * License or the Less License, as specified in the README file. + * + * For more information about less, or for information on how to + * contact the author, see the README file. + */ + + +/* +----------------------- CHANGE HISTORY -------------------------- + + 1/29/84 Allowed use on standard input + 2/1/84 Added E, N, P commands + 4/17/84 Added '=' command, 'stop' signal handling + 4/20/84 Added line folding +v2 4/27/84 Fixed '=' command to use BOTTOM_PLUS_ONE, + instead of TOP, added 'p' & 'v' commands +v3 5/3/84 Added -m and -t options, '-' command +v4 5/3/84 Added LESS environment variable +v5 5/3/84 New comments, fixed '-' command slightly +v6 5/15/84 Added -Q, visual bell +v7 5/24/84 Fixed jump_back(n) bug: n should count real + lines, not folded lines. Also allow number on G command. +v8 5/30/84 Re-do -q and -Q commands +v9 9/25/84 Added "+" argument +v10 10/10/84 Fixed bug in -b argument processing +v11 10/18/84 Made error() ring bell if \n not entered. +----------------------------------------------------------------- +v12 2/13/85 Reorganized signal handling and made portable to 4.2bsd. +v13 2/16/85 Reword error message for '-' command. +v14 2/22/85 Added -bf and -bp variants of -b. +v15 2/25/85 Miscellaneous changes. +v16 3/13/85 Added -u flag for backspace processing. +v17 4/13/85 Added j and k commands, changed -t default. +v18 4/20/85 Rewrote signal handling code. +v19 5/2/85 Got rid of "verbose" eq_message(). + Made search() scroll in some cases. +v20 5/21/85 Fixed screen.c ioctls for System V. +v21 5/23/85 Fixed some first_cmd bugs. +v22 5/24/85 Added support for no RECOMP nor REGCMP. +v23 5/25/85 Miscellanous changes and prettying up. + Posted to USENET. +----------------------------------------------------------------- +v24 6/3/85 Added ti,te terminal init & de-init. + (Thanks to Mike Kersenbrock) +v25 6/8/85 Added -U flag, standout mode underlining. +v26 6/9/85 Added -M flag. + Use underline termcap (us) if it exists. +v27 6/15/85 Renamed some variables to make unique in + 6 chars. Minor fix to -m. +v28 6/28/85 Fixed right margin bug. +v29 6/28/85 Incorporated M.Rose's changes to signal.c +v30 6/29/85 Fixed stupid bug in argument processing. +v31 7/15/85 Added -p flag, changed repaint algorithm. + Added kludge for magic cookie terminals. +v32 7/16/85 Added cat_file if output not a tty. +v33 7/23/85 Added -e flag and EDITOR. +v34 7/26/85 Added -s flag. +v35 7/27/85 Rewrote option handling; added option.c. +v36 7/29/85 Fixed -e flag to work if not last file. +v37 8/10/85 Added -x flag. +v38 8/19/85 Changed prompting; created prompt.c. +v39 8/24/85 (Not -p) does not initially clear screen. +v40 8/26/85 Added "skipping" indicator in forw(). + Posted to USENET. +----------------------------------------------------------------- +v41 9/17/85 ONLY_RETURN, control char commands, + faster search, other minor fixes. +v42 9/25/85 Added ++ command line syntax; + ch_fsize for pipes. +v43 10/15/85 Added -h flag, changed prim.c algorithms. +v44 10/16/85 Made END print in all cases of eof; + ignore SIGTTOU after receiv ing SIGTSTP. +v45 10/16/85 Never print backspaces unless -u. +v46 10/24/85 Backwards scroll in jump_loc. +v47 10/30/85 Fixed bug in edit(): *first_cmd==0 +v48 11/16/85 Use TIOCSETN instead of TIOCSETP. + Added marks (m and ' commands). + Posted to USENET. +----------------------------------------------------------------- +v49 1/9/86 Fixed bug: signal didn't clear mcc. +v50 1/15/86 Added ' (quote) to gomark. +v51 1/16/86 Added + cmd, fixed problem if first_cmd + fails, made g cmd sort of "work" on pipes + ev en if bof is no longer buffered. +v52 1/17/86 Made short files work better. +v53 1/20/86 Added -P option. +v54 1/20/86 Changed help to use HELPFILE. +v55 1/23/86 Messages work better if not tty output. +v56 1/24/86 Added -l option. +v57 1/31/86 Fixed -l to get confirmation before + ov erwriting an existing file. +v58 8/28/86 Added filename globbing. +v59 9/15/86 Fixed some bugs with very long filenames. +v60 9/26/86 Incorporated changes from Leith (Casey) + Leedom for boldface and -z option. +v61 9/26/86 Got rid of annoying repaints after ! cmd. + Posted to USENET. +----------------------------------------------------------------- +v62 12/23/86 Added is_directory(); change -z default to + -1 instead of 24; cat-and-exit if -e and + file is less than a screenful. +v63 1/8/87 Fixed bug in cat-and-exit if > 1 file. +v64 1/12/87 Changed puts/putstr, putc/putchr, + getc/getchr to av oid name conflict with + stdio functions. +v65 1/26/87 Allowed '-' command to change NUMBER + v alued options (thanks to Gary Puckering) +v66 2/13/87 Fixed bug: prepaint should use force=1. +v67 2/24/87 Added !! and % expansion to ! command. +v68 2/25/87 Added SIGWINCH and TIOCGWINSZ support; + changed is_directory to bad_file. + (thanks to J. Robert Ward) +v69 2/25/87 Added SIGWIND and WIOCGETD (for Unix PC). +v70 3/13/87 Changed help cmd from 'h' to 'H'; better + error msgs in bad_file, errno_message. +v71 5/11/87 Changed -p to -c, made triple -c/-C + for clear-eol like more's -c. +v72 6/26/87 Added -E, -L, use $SHELL in lsystem(). + (thanks to Stev e Spearman) +v73 6/26/87 Allow Examine "#" for previous file. + Posted to USENET 8/25/87. +----------------------------------------------------------------- +v74 9/18/87 Fix conflict in EOF symbol with stdio.h, + Make os.c more portable to BSD. +v75 9/23/87 Fix problems in get_term (thanks to + Paul Eggert); new backwards scrolling in + jump_loc (thanks to Marion Hakanson). +v76 9/23/87 Added -i flag; allow single "!" to + inv oke a shell (thanks to Franco Barber). +v77 9/24/87 Added -n flag and line number support. +v78 9/25/87 Fixed problem with prompts longer than + the screen width. +v79 9/29/87 Added the _ command. +v80 10/6/87 Allow signal to break out of linenum scan. +v81 10/6/87 Allow -b to be changed from within less. +v82 10/7/87 Add cmd_decode to use a table for key + binding (thanks to Dav id Nason). +v83 10/9/87 Allow .less file for user-defined keys. +v84 10/11/87 Fix -e/-E problems (thanks to Felix Lee). +v85 10/15/87 Search now keeps track of line numbers. +v86 10/20/87 Added -B option and autobuf; fixed + "pipe error" bug. +v87 3/1/88 Fix bug re BSD signals while reading file. +v88 3/12/88 Use new format for -P option (thanks to + der Mouse), allow "+-c" without message, + fix bug re BSD hangup. +v89 3/18/88 Turn off line numbers if linenum scan + is interrupted. +v90 3/30/88 Allow -P from within less. +v91 3/30/88 Added tags file support (new -t option) + (thanks to Brian Campbell). +v92 4/4/88 Added -+option syntax. +v93 4/11/88 Add support for slow input (thanks to + Joe Orost & apologies for taking almost + 3 years to get this in!) +v94 4/11/88 Redo reading/signal stuff. +v95 4/20/88 Repaint screen better after signal. +v96 4/21/88 Add /! and ?! commands. +v97 5/17/88 Allow -l/-L from within less. + Eliminate some static arrays (use calloc). + Posted to USENET. +----------------------------------------------------------------- +v98 10/14/88 Fix incorrect calloc call; uninitialized + var in exec_mca; core dump on unknown TERM. + Make v cmd work if past last line of file. + Fix some signal bugs. +v99 10/29/88 Allow space between -X and string, + when X is a string-valued option. +v100 1/5/89 Fix globbing bug when $SHELL not set; + allow spaces after -t command. +v101 1/6/89 Fix problem with long (truncated) lines + in tags file (thanks to Neil Dixon). +v102 1/6/89 Fix bug with E# when no prev file; + allow spaces after -l command. +v103 3/14/89 Add -N, -f and -? options. Add z and w + commands. Add %L for prompt strings. +v104 3/16/89 Added EDITPROTO. +v105 3/20/89 Fix bug in find_linenum which cached + incorrectly on long lines. +v106 3/31/89 Added -k option and multiple lesskey + files. +v107 4/27/89 Add 8-bit char support and -g option. + Split option code into 3 files. +v108 5/5/89 Allocate position table dynamically + (thanks to Paul Eggert); change % command + from "percent" to vi-style brace finder. +v109 5/10/89 Added ESC-% command, split prim.c. +v110 5/24/89 Fixed bug in + option; fixed repaint bug + under Sun windows (thanks to Paul Eggert). +v111 5/25/89 Generalized # and % expansion; use + calloc for some error messages. +v112 5/30/89 Get rid of ESC-%, add {}()[] commands. +v113 5/31/89 Optimize lseeks (thanks to Paul Eggert). +v114 7/25/89 Added ESC-/ and ESC-/! commands. +v115 7/26/89 Added ESC-n command. +v116 7/31/89 Added find_pos to optimize g command. +v117 8/1/89 Change -f option to -r. +v118 8/2/89 Save positions for all previous files, + not just the immediately previous one. +v119 8/7/89 Save marks across file boundaries. + Add file handle stuff. +v120 8/11/89 Add :ta command. +v121 8/16/89 Add -f option. +v122 8/30/89 Fix performance with many buffers. +v123 8/31/89 Verbose prompts for string options. + Posted beta to USENET. +----------------------------------------------------------------- +v124 9/18/89 Reorganize search commands, + N = rev, ESC-n = span, add ESC-N. +v125 9/18/89 Fix tab bug (thanks to Alex Liu). + Fix EOF bug when both -w and -c. +v126 10/25/89 Add -j option. +v127 10/27/89 Fix problems with blank lines before BOF. +v128 10/27/89 Add %bj, etc. to prompt strings. +v129 11/3/89 Add -+,-- commands; add set-option and + unset-option to lesskey. +v130 11/6/89 Generalize A_EXTRA to string, remove + set-option, unset-option from lesskey. +v131 11/7/89 Changed name of EDITPROTO to LESSEDIT. +v132 11/8/89 Allow editing of command prefix. +v133 11/16/89 Add -y option (thanks to Jeff Sullivan). +v134 12/1/89 Glob filenames in the -l command. +v135 12/5/89 Combined {}()[] commands into one, and + added ESC-^F and ESC-^B commands. +v136 1/20/90 Added -S, -R flags. Added | command. + Added warning for binary files. (thanks + to Richard Brittain and J. Sullivan). +v137 1/21/90 Rewrote horrible pappend code. + Added * notation for hi-bit chars. +v138 1/24/90 Fix magic cookie terminal handling. + Get rid of "cleanup" loop in ch_get. +v139 1/27/90 Added MSDOS support. (many thanks + to Richard Brittain). +v140 2/7/90 Editing a new file adds it to the + command line list. +v141 2/8/90 Add edit_list for editing >1 file. +v142 2/10/90 Add :x command. +v143 2/11/90 Add * and @ modifies to search cmds. + Change ESC-/ cmd from /@* to / *. +v144 3/1/90 Messed around with ch_zero; + no real change. +v145 3/2/90 Added -R and -v/-V for MSDOS; + renamed FILENAME to avoid conflict. +v146 3/5/90 Pull cmdbuf functions out of command.c +v147 3/7/90 Implement ?@; fix multi-file edit bugs. +v148 3/29/90 Fixed bug in :e then :e#. +v149 4/3/90 Change error,ierror,query to use PARG. +v150 4/6/90 Add LESS_CHARSET, LESS_CHARDEF. +v151 4/13/90 Remove -g option; clean up ispipe. +v152 4/14/90 lsystem() closes input file, for + editors which require exclusive open. +v153 4/18/90 Fix bug if SHELL unset; + fix bug in overstrike control char. +v154 4/25/90 Output to fd 2 via buffer. +v155 4/30/90 Ignore -i if uppercase in pattern + (thanks to Michael Rendell.) +v156 5/3/90 Remove scroll limits in forw() & back(); + causes problems with -c. +v157 5/4/90 Forward search starts at next real line + (not screen line) after jump target. +v158 6/14/90 Added F command. +v159 7/29/90 Fix bug in exiting: output not flushed. +v160 7/29/90 Clear screen before initial output w/ -c. +v161 7/29/90 Add -T flag. +v162 8/14/90 Fix bug with +F on command line. +v163 8/21/90 Added LESSBINFMT variable. +v164 9/5/90 Added -p, LINES, COLUMNS and + unset mark ' == BOF, for 1003.2 D5. +v165 9/6/90 At EOF with -c set, don't display empty + screen when try to page forward. +v166 9/6/90 Fix G when final line in file wraps. +v167 9/11/90 Translate CR/LF -> LF for 1003.2. +v168 9/13/90 Return to curr file if "tag not found". +v169 12/12/90 G goes to EOF even if file has grown. +v170 1/17/91 Add optimization for BSD _setjmp; + fix #include ioctl.h TERMIO problem. + (thanks to Paul Eggert) + Posted to USENET. +----------------------------------------------------------------- +v171 3/6/91 Fix -? bug in get_filename. +v172 3/15/91 Fix G bug in empty file. + Fix bug with ?\n and -i and uppercase + pattern at EOF! + (thanks to Paul Eggert) +v173 3/17/91 Change N cmd to not permanently change + direction. (thanks to Brian Matthews) +v174 3/18/91 Fix bug with namelogfile not getting + cleared when change files. +v175 3/18/91 Fix bug with ++cmd on command line. + (thanks to Jim Meyering) +v176 4/2/91 Change | to not force current screen, + include marked line, start/end from + top of screen. Improve search speed. + (thanks to Don Mears) +v177 4/2/91 Add LESSHELP variable. + Fix bug with F command with -e. + Try /dev/tty for input before using fd 2. + Patches posted to USENET 4/2/91. +----------------------------------------------------------------- +v178 4/8/91 Fixed bug in globbing logfile name. + (thanks to Jim Meyering) +v179 4/9/91 Allow negative -z for screen-relative. +v180 4/9/91 Clear to eos rather than eol if "db"; + don't use "sr" if "da". + (thanks to Tor Lillqvist) +v181 4/18/91 Fixed bug with "negative" chars 80 - FF. + (thanks to Benny Sander Hofmann) +v182 5/16/91 Fixed bug with attribute at EOL. + (thanks to Brian Matthews) +v183 6/1/91 Rewrite linstall to do smart config. +v184 7/11/91 Process \b in searches based on -u + rather than -i. +v185 7/11/91 -Pxxx sets short prompt; assume SIGWINCH + after a SIGSTOP. (thanks to Ken Laprade) +----------------------------------------------------------------- +v186 4/20/92 Port to MS-DOS (Microsoft C). +v187 4/23/92 Added -D option & TAB_COMPLETE_FILENAME. +v188 4/28/92 Added command line editing features. +v189 12/8/92 Fix mem overrun in anscreen.c:init; + fix edit_list to recover from bin file. +v190 2/13/93 Make TAB enter one filename at a time; + create ^L with old TAB functionality. +v191 3/10/93 Defer creating "flash" page for MS-DOS. +v192 9/6/93 Add BACK-TAB. +v193 9/17/93 Simplify binary_file handling. +v194 1/4/94 Add rudiments of alt_filename handling. +v195 1/11/94 Port back to Unix; support keypad. +----------------------------------------------------------------- +v196 6/7/94 Fix bug with bad filename; fix IFILE + type problem. (thanks to David MacKenzie) +v197 6/7/94 Fix bug with .less tables inserted wrong. +v198 6/23/94 Use autoconf installation technology. + (thanks to David MacKenzie) +v199 6/29/94 Fix MS-DOS build (thanks to Tim Wiegman). +v200 7/25/94 Clean up copyright, minor fixes. + Posted to prep.ai.mit.edu +----------------------------------------------------------------- +v201 7/27/94 Check for no memcpy; add casts to calloc; + look for regcmp in libgen.a. + (thanks to Kaveh Ghazi). +v202 7/28/94 Fix bug in edit_next/edit_prev with + non-existent files. +v203 8/2/94 Fix a variety of configuration bugs on + various systems. (thanks to Sakai + Kiyotaka, Harald Koenig, Bjorn Brox, + Teemu Rantanen, and Thorsten Lockert) +v204 8/3/94 Use strerror if available. + (thanks to J.T. Conklin) +v205 8/5/94 Fix bug in finding "me" termcap entry. + (thanks to Andreas Stolcke) +8/10/94 v205+: Change BUFSIZ to LBUFSIZE to avoid name + conflict with stdio.h. + Posted to prep.ai.mit.edu +----------------------------------------------------------------- +v206 8/10/94 Use initial_scrpos for -t to avoid + displaying first page before init(). + (thanks to Dominique Petitpierre) +v207 8/12/94 Fix bug if stdout is not tty. +v208 8/16/94 Fix bug in close_altfile if goto err1 + in edit_ifile. (Thanks to M.J. Hewitt) +v209 8/16/94 Change scroll to wscroll to avoid + conflict with library function. +v210 8/16/94 Fix bug with bold on 8 bit chars. + (thanks to Vitor Duarte) +v211 8/16/94 Don't quit on EOI in jump_loc / forw. +v212 8/18/94 Use time_t if available. +v213 8/20/94 Allow ospeed to be defined in termcap.h. +v214 8/20/94 Added HILITE_SEARCH, -F, ESC-u cmd. + (thanks to Paul Lew and Bob Byrnes) +v215 8/23/94 Fix -i toggle behavior. +v216 8/23/94 Process BS in all searches, not only -u. +v217 8/24/94 Added -X flag. +v218 8/24/94 Reimplement undo_search. +v219 8/24/94 Find tags marked with line number + instead of pattern. +v220 8/24/94 Stay at same position after SIG_WINCH. +v221 8/24/94 Fix bug in file percentage in big file. +v222 8/25/94 Do better if can't reopen current file. +v223 8/27/94 Support setlocale. + (thanks to Robert Joop) +v224 8/29/94 Revert v216: process BS in search + only if -u. +v225 9/6/94 Rewrite undo_search again: toggle. +v226 9/15/94 Configuration fixes. + (thanks to David MacKenzie) +v227 9/19/94 Fixed strerror config problem. + Posted to prep.ai.mit.edu +----------------------------------------------------------------- +v228 9/21/94 Fix bug in signals: repeated calls to + get_editkeys overflowed st_edittable. +v229 9/21/94 Fix "Nothing to search" error if -a + and SRCH_PAST_EOF. +v230 9/21/94 Don't print extra error msg in search + after regerror(). +v231 9/22/94 Fix hilite bug if search matches 0 chars. + (thanks to John Polstra) +v232 9/23/94 Deal with weird systems that have + termios.h but not tcgetattr(). + Posted to prep.ai.mit.edu +----------------------------------------------------------------- +v233 9/26/94 Use get_term() instead of pos_init() in + psignals to re-get lower_left termcap. + (Thanks to John Malecki) +v234 9/26/94 Make MIDDLE closer to middle of screen. +v235 9/27/94 Use local strchr if system doesn't have. +v236 9/28/94 Don't use libucb; use libterm if + libtermcap & libcurses doesn't work. + (Fix for Solaris; thanks to Frank Kaefer) +v237 9/30/94 Use system isupper() etc if provided. + Posted to prep.ai.mit.edu +----------------------------------------------------------------- +v238 10/6/94 Make binary non-blinking if LESSBINFMT + is set to a string without a *. +v239 10/7/94 Don't let delimit_word run back past + beginning of cmdbuf. +v240 10/10/94 Don't write into termcap buffer. + (Thanks to Benoit Speckel) +v241 10/13/94 New lesskey file format. + Don't expand filenames in search command. +v242 10/14/94 Allow lesskey specification of "literal". +v243 10/14/94 Add #stop command to lesskey. +v244 10/16/94 Add -f flag to lesskey. +v245 10/25/94 Allow TAB_COMPLETE_FILENAME to be undefd. +v246 10/27/94 Move help file to /usr/local/share. +v247 10/27/94 Add -V option. +v248 11/5/94 Add -V option to lesskey. +v249 11/5/94 Remove -f flag from lesskey; default + input file is ~/.lesskey.in, not stdin. +v250 11/7/94 Lesskey input file "-" means stdin. +v251 11/9/94 Convert cfgetospeed result to ospeed. + (Thanks to Andrew Chernov) +v252 11/16/94 Change default lesskey input file from + .lesskey.in to .lesskey. + Posted to prep.ai.mit.edu +----------------------------------------------------------------- +v253 11/21/94 Fix bug when tags file has a backslash. +v254 12/6/94 Fix -k option. +v255 12/8/94 Add #define EXAMINE to disable :e etc. +v256 12/10/94 Change highlighting: only highlite search + results (but now it is reliable). +v257 12/10/94 Add goto_line and repaint_highlight + to optimize highlight repaints. +v258 12/12/94 Fixup in hilite_line if BS_SPECIAL. +v259 12/12/94 Convert to autoconf 2.0. +v260 12/13/94 Add SECURE define. +v261 12/14/94 Use system WERASE char as EC_W_BACKSPACE. +v262 12/16/94 Add -g/-G flag and screen_hilite. +v263 12/20/94 Reimplement/optimize -G flag behavior. +v264 12/23/94 Allow EXTRA string after line-edit cmd + in lesskey file. +v265 12/24/94 Add LESSOPEN=|cmd syntax. +v266 12/26/94 Add -I flag. +v267 12/28/94 Formalize the four-byte header emitted + by a LESSOPEN pipe. +v268 12/28/94 Get rid of four-byte header. +v269 1/2/95 Close alt file before open new one. + Avoids multiple popen(). +v270 1/3/95 Use VISUAL; use S_ISDIR/S_ISREG; fix + config problem with Solaris POSIX regcomp. +v271 1/4/95 Don't quit on read error. +v272 1/5/95 Get rid of -L. +v273 1/6/95 Fix ch_ungetchar bug; don't call + LESSOPEN on a pipe. +v274 1/6/95 Ported to OS/2 (thanks to Kai Uwe Rommel) +v275 1/18/95 Fix bug if toggle -G at EOF. +v276 1/30/95 Fix OS/2 version. +v277 1/31/95 Add "next" charset; don't display ^X + for X > 128. +v278 2/14/95 Change default for -G. + Posted to prep.ai.mit.edu +----------------------------------------------------------------- +v279 2/22/95 Add GNU options --help, --version. + Minor config fixes. +v280 2/24/95 Clean up calls to glob(); don't set # + if we can't open the new file. +v281 2/24/95 Repeat search should turn on hilites. +v282 3/2/95 Minor fixes. +v283 3/2/95 Fix homefile; make OS2 look in $HOME. +v284 3/2/95 Error if "v" on LESSOPENed file; + "%" figures out file size on pipe. +v285 3/7/95 Don't set # in lsystem; + lesskey try $HOME first. +v286 3/7/95 Reformat change history (too much free time?). +v287 3/8/95 Fix hilite bug if overstrike multiple chars. +v288 3/8/95 Allow lesskey to override get_editkey keys. +v289 3/9/95 Fix adj_hilite bug when line gets processed by + hilite_line more than once. +v290 3/9/95 Make configure automatically. Fix Sequent problem + with incompatible sigsetmask(). + Posted to prep.ai.mit.edu +----------------------------------------------------------------- +v291 3/21/95 Add #env to lesskey. Fix MS-DOS build. + Posted to simtel. +----------------------------------------------------------------- +v292 4/24/95 Add MS-DOS support for Borland C. + Fix arrow keys in MS-DOS versions. +v293 4/28/95 Add auto-versioning stuff to make dist. +v294 5/12/95 Fix Borland build. +v295 1/20/96 Fix search on squished file; add /@@. +v296 1/23/96 Allow cmdbuf larger than screen width. +v297 1/24/96 Don't call termcap if tgetent fails; + add #defines for buffers. +v298 1/24/96 Change @@ to ^K. + Add alternate search modifiers ^N, ^F, ^E. +v299 1/25/96 Fix percent overflow in jump_percent (thanks to Brent Wiese); + don't send "ti" after shell command till RETURN pressed. +v300 1/25/96 Change -U to print tabs as ^I. +v301 1/30/96 Make hilites work in cmd F output. +v302 1/31/96 Fix cmd F to notice window-change signals. +v303 1/31/96 Add ESC-SPACE command. +v304 2/1/96 Add ^R search modifier; add LESSSECURE. +v305 2/2/96 Workaround Linux /proc kernel bug; add LESSKEY. +v306 3/16/96 Minor fixes. +v307 3/25/96 Allow cmd line arg "--"; fix DOS & OS/2 defines.h. +v308 4/4/96 Port to OS-9 (thanks to Boisy Pitre); fix -d. +v309 4/9/96 Fix OS-9 version; fix tags bug with "$". +v310 4/10/96 Get rid of HELPFILE. +v311 4/22/96 Add Windows32 support; merge doscreen.c into screen.c. +v312 4/24/96 Don't quit after "cannot reopen" error. +v313 4/25/96 Added horizontal scrolling. +v314 4/26/96 Modified -e to quit on reaching end of a squished file. +v315 4/26/96 Fix "!;TAB" bug. +v316 5/2/96 Make "|a" when (a < curr screen) go to end of curr screen. +v317 5/14/96 Various fixes for the MS-DOS and OS/2 builds. + Added ## and %% handling for filenames +v318 5/29/96 Port to OS-9 Microware compiler; minor fixes + (thanks to Martin Gregorie). +v319 7/8/96 Fix Windows port (thanks to Jeff Paquette). +v320 7/11/96 Final fixes for Windows port. +v321 7/18/96 Minor fixes. + Posted to Web page. +----------------------------------------------------------------- +v322 8/13/96 Fix bug in shell escape from help file; add support for + Microsoft Visual C under Windows; numerous small fixes. +v323 8/19/96 Fixes for Windows version (thanks to Simon Munton); + fix for Linux library weirdness (thanks to Jim Diamond); + port to DJGPP (thanks to Eli Zaretskii). +v324 8/21/96 Add support for spaces in filenames (thanks to Simon Munton). +v325 8/21/96 Add lessecho, for spaces in filenames under Unix. +v326 8/27/96 Fix DJGPP version. +v327 9/1/96 Reorganize lglob, make spaces in filenames work better in Unix. +v328 10/7/96 Append / to directory name in filename completion. + Fix MS-DOS and OS-9 versions. +v329 10/11/96 Fix more MS-DOS bugs; add LESSSEPARATOR; add -" option. + Add LESSMETACHARS, LESSMETAESCAPE. +v330 10/21/96 Minor fixes. + Posted to Web page. +----------------------------------------------------------------- +v331 4/22/97 Various Windows fixes (thanks to Gurusamy Sarathy). +v332 4/22/97 Enter filenames from cmd line into edit history. + Posted to Web page. +----------------------------------------------------------------- +v333 3/4/99 Changed -w to highlite new line after forward movement. +v334 3/9/99 Avoid overflowing prompt buffer; add %d and %D. +v335 3/20/99 Add EBCDIC support (thanks to Thomas Dorner). + Use HOMEDRIVE/HOMEPATH on Windows (thanks to Preston Bannister). + Posted to Web page. +----------------------------------------------------------------- +v336 4/8/99 Fix installation bugs. +v337 4/9/99 Fix another installation bug. + Posted to Web page. +----------------------------------------------------------------- +v338 4/13/99 Add support for long option names. +v339 4/18/99 Add \k, long option names to lesskey. Add -^P. Add :d. +v340 4/21/99 Add regexec2. Fix Windows build. + Posted to Web page. +----------------------------------------------------------------- +v341 5/6/99 Add -F option; %c & ?c prompt escapes. + (Thanks to Michele Maltoni) +v342 7/22/99 Add system-wide lesskey file; allow GPL or Less License. +v343 9/23/99 Support UTF-8 (Thanks to Robert Brady). + Add %P and ?P in prompts. +v344 10/27/99 -w highlights target line of g and p commands. +v345 10/29/99 Make -R pass thru ESC but not other control chars. + Posted to Web page. +----------------------------------------------------------------- +v346 11/4/99 Fix bugs in long option processing; R cmd should clear hilites. + Posted to Web page. +----------------------------------------------------------------- +v347 12/13/99 Fixes for DJGPP version (thanks to Eli Zaretskii). +v348 12/28/99 Fix deleting file with marks (thanks to Dimitar Jekov). + Fix color problem in DJGPP version (thanks to Eli Zaretskii). +v349 1/24/00 Fix minor DJGPP bugs; check environment vars for UTF-8; + add --with-editor (thanks to Eli, Markus Kuhn, Thomas Schoepf). +v350 3/1/00 Fix clear-while-standout bug. +v351 3/5/00 Change -M and = prompts to show top & bottom line number. + Posted to Web page. +----------------------------------------------------------------- +v352 3/8/00 Fix scan_option NULL dereference. +----------------------------------------------------------------- +v353 3/20/00 Fix SECURE compile bug, allow space after numeric option. +v354 3/23/00 Add support for PCRE; add --with-regex configure option. +----------------------------------------------------------------- +v355 6/28/00 Add -# option (thanks to Andy Levinson). +v356 7/5/00 Add -J option. +v357 7/6/00 Support sigprocmask. +----------------------------------------------------------------- +v358 7/8/00 Fix problems with #stop in lesskey file. + Posted to Web page. +----------------------------------------------------------------- +v359 9/10/00 Fixes for Win32 display problems (thanks to Maurizio Vairani). +v360 1/17/01 Move sysless to etc. +v361 12/4/01 Add IBM-1047 charset & EBCDIC fixes (thanks to Thomas Dorner). + Fix 32 bit dependencies (thanks to Paul Eggert). + Fix UTF-8 overstriking (thanks to Robert Brady). +v362 12/4/01 Make status column show search targets. +v363 12/6/01 Add --no-keypad option. + Add variable width tabstops (thanks to Peter Samuelson). +v364 12/10/01 Better handling of very long lines in input; + Fix horizontal shifting of colored text. +v365 12/11/01 Fix overstriking of tabs; + Add support for global(1) and multiple tag matches + (thanks to Shigio Yamaguchi and Tim Vanderhoek). +v366 12/11/01 Fixes for OS/2 (thanks to Kyosuke Tokoro). +v367 12/13/01 Allow -D and -x options to terminate without dollar sign; + Right/left arrow when entering N are shift cmds, not line edit. +v368 12/18/01 Update lesskey commands. +v370 12/23/01 Fix tags error messages. + Posted to Web page. +----------------------------------------------------------------- +v371 12/26/01 Fix new_file bug; use popen in Windows version; + fix some compiler warnings. +v372 12/29/01 Make -b be in units of 1K. +v373 1/14/02 Improve handling of filenames containing shell metachars. +v374 2/7/02 Fix memory leak; fix bug in -x argument parsing. +v375 4/7/02 Fix searching for SGR sequences; fix SECURE build; + add SGR support to DJGPP version (thanks to Eli Zaretskii). +v376 6/10/02 Fix bug in overstriking mulitbyte UTF-8 characters + (thanks to Jungshik Shin). + Posted to Web page. +----------------------------------------------------------------- +v377 9/10/02 Fix bug in Windows version when file contains CR; + fix bug in search highlights with -R; + make initial buffer limit really be 64K not unlimited. +v378 9/30/02 Misc bug fixes and compiler warning cleanup. + Posted to Web page. +----------------------------------------------------------------- +v379 11/23/02 Add -L option; fix bug with ctrl-K in lesskey files; + improve UTF-8 overstriking and underscore overstriking; + fix minor man page problems; change to autoconf 2.54. +v380 11/24/02 Make LINENUM same as POSITION. +v381 11/28/02 Make -N use 7 columns for line number if possible. +----------------------------------------------------------------- +v382 2/3/04 Remove copyrighted code. +----------------------------------------------------------------- +v383 2/16/04 Add history file; add -K option; improve UTF-8 handling; + fix some signed char bugs (thanks to Christian Biere); + fix some upper/lower case bugs (thanks to Bjoern Jacke); + add erase2 char (thanks to David Lawrence); + add windows charset (thanks to Dimitar Zhekov). +v384 2/20/04 Improvements in UTF-8 handling. +v385 2/23/04 Fix UTF-8 output bug. +----------------------------------------------------------------- +v386 9/13/05 Improvements to UTF-8 shift & color (thanks to Charles Levert); + protect against invalid LESSOPEN and LESSCLOSE values. +v387 9/14/05 Update Charles Levert's UTF-8 patch. +v388 9/14/05 Change history behavior; change most sprintf calls to snprintf. +v389 9/14/05 Fix copy & paste with long lines; improve performance of + expand_linebuf; fix crash in init_mlist; +v390 9/15/05 Show search matches in status column even if -G is set. +----------------------------------------------------------------- +v391 9/17/05 Fix bugs. +v392 10/14/05 Fix line wrapping bug. +v393 10/19/05 Allow multiple attributes per char; fix bold+underline bug + (thanks again to Charles Levert). +v394 11/8/05 Fix prompt bug; fix compile problem in Windows build. +*/ + +char version[] = "394"; diff --git a/commands/less/less2netbsd b/commands/less/less2netbsd new file mode 100755 index 000000000..104bea7c0 --- /dev/null +++ b/commands/less/less2netbsd @@ -0,0 +1,100 @@ +#! /bin/sh +# +# $NetBSD: less2netbsd,v 1.8 2008/05/29 14:51:27 mrg Exp $ +# +# Copyright (c) 1996, 2003 Matthew R. Green +# All rights reserved. +# +# 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. +# +# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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. + +# less2netbsd: convert a less source tree into a netbsd less source +# tree, under src/usr.bin/less ready for importing. note that you need +# to run ./configure to generate defines.h (a bug in less 381's configure +# wrongly does not find sigset_t on NetBSD; correct this in defines.h.) + +if [ $# -ne 2 ]; then echo "less2netbsd src dest"; exit 1; fi + +r=$1 +d=$2/less + +case "$d" in + /*) + ;; + *) + d=`/bin/pwd`/$d + ;; +esac + +case "$r" in + /*) + ;; + *) + r=`/bin/pwd`/$r + ;; +esac + +echo preparing directory $d +rm -rf $d +mkdir -p $d; cd $d +mkdir -p src/usr.bin/less/less src/usr.bin/less/lesskey src/usr.bin/less/lessecho + +### start less ############################### +cd $r +echo less: +src="main.c screen.c brac.c ch.c charset.c cmdbuf.c command.c decode.c edit.c filename.c forwback.c help.c ifile.c input.c jump.c line.c linenum.c lsystem.c mark.c optfunc.c option.c opttbl.c os.c output.c position.c prompt.c search.c signal.c tags.c ttyin.c version.c" +src="$src charset.h cmd.h defines.h funcs.h less.h lesskey.h lglob.h option.h pckeys.h position.h regexp.h" +src="$src INSTALL LICENSE NEWS README less.nro" + +pax -rvw $src $d/src/usr.bin/less/less + +cd $d/src/usr.bin/less/less +mv less.nro less.1 + +### end less ############################### + +### start lesskey ############################### +cd $r +echo lesskey: +src='lesskey.c lesskey.h lesskey.nro' + +pax -rvw $src $d/src/usr.bin/less/lesskey + +cd $d/src/usr.bin/less/lesskey +mv lesskey.nro lesskey.1 + +### end lesskey ############################### + +### start lessecho ############################### +cd $r +echo lessecho: +src='lessecho.c' + +pax -rvw $src $d/src/usr.bin/less/lessecho + +### end lesskey ############################### + +find $d -name '*.[ch]' -print | while read c; do + chmod u+w $c +done + +echo done +exit 0 diff --git a/commands/less/lessecho/Makefile b/commands/less/lessecho/Makefile new file mode 100644 index 000000000..5e63d437d --- /dev/null +++ b/commands/less/lessecho/Makefile @@ -0,0 +1,10 @@ +# $NetBSD: Makefile,v 1.3 2002/09/18 14:00:38 lukem Exp $ + +NOMAN= # defined + +PROG= lessecho +SRCS= lessecho.c version.c +CPPFLAGS+=-I${.CURDIR}/../less +.PATH: ${.CURDIR}/../less + +.include diff --git a/commands/less/lessecho/lessecho.c b/commands/less/lessecho/lessecho.c new file mode 100644 index 000000000..fac7a1f24 --- /dev/null +++ b/commands/less/lessecho/lessecho.c @@ -0,0 +1,279 @@ +/* $NetBSD: lessecho.c,v 1.6 2006/10/26 01:33:08 mrg Exp $ */ + +/* + * Copyright (C) 1984-2004 Mark Nudelman + * + * You may distribute under the terms of either the GNU General Public + * License or the Less License, as specified in the README file. + * + * For more information about less, or for information on how to + * contact the author, see the README file. + */ + + +/* + * lessecho [-ox] [-cx] [-pn] [-dn] [-a] file ... + * Simply echos its filename arguments on standard output. + * But any argument containing spaces is enclosed in quotes. + * + * -ox Specifies "x" to be the open quote character. + * -cx Specifies "x" to be the close quote character. + * -pn Specifies "n" to be the open quote character, as an integer. + * -dn Specifies "n" to be the close quote character, as an integer. + * -mx Specifies "x" to be a metachar. + * -nn Specifies "n" to be a metachar, as an integer. + * -ex Specifies "x" to be the escape char for metachars. + * -fn Specifies "x" to be the escape char for metachars, as an integer. + * -a Specifies that all arguments are to be quoted. + * The default is that only arguments containing spaces are quoted. + */ + +#include "less.h" + +static char *version = "$Revision: 1.6 $"; + +static int quote_all = 0; +static char openquote = '"'; +static char closequote = '"'; +static char *meta_escape = "\\"; +static char meta_escape_buf[2]; +static char metachars[64] = ""; +static int num_metachars = 0; + +static void pr_usage __P((void)); +static void pr_version __P((void)); +static void pr_error __P((char *)); +static long lstrtol __P((char *, int, char **)); + + static void +pr_usage() +{ + fprintf(stderr, + "usage: lessecho [-ox] [-cx] [-pn] [-dn] [-mx] [-nn] [-ex] [-fn] [-a] file ...\n"); +} + + static void +pr_version() +{ + char *p; + char buf[10]; + char *pbuf = buf; + + for (p = version; *p != ' '; p++) + if (*p == '\0') + return; + for (p++; *p != '$' && *p != ' ' && *p != '\0'; p++) + *pbuf++ = *p; + *pbuf = '\0'; + printf("%s\n", buf); +} + + static void +pr_error(s) + char *s; +{ + fprintf(stderr, "%s\n", s); + exit(1); +} + + static long +lstrtol(s, radix, pend) + char *s; + int radix; + char **pend; +{ + int v; + int neg = 0; + long n = 0; + + /* Skip leading white space. */ + while (*s == ' ' || *s == '\t') + s++; + + /* Check for a leading + or -. */ + if (*s == '-') + { + neg = 1; + s++; + } else if (*s == '+') + { + s++; + } + + /* Determine radix if caller does not specify. */ + if (radix == 0) + { + radix = 10; + if (*s == '0') + { + switch (*++s) + { + case 'x': + radix = 16; + s++; + break; + default: + radix = 8; + break; + } + } + } + + /* Parse the digits of the number. */ + for (;;) + { + if (*s >= '0' && *s <= '9') + v = *s - '0'; + else if (*s >= 'a' && *s <= 'f') + v = *s - 'a' + 10; + else if (*s >= 'A' && *s <= 'F') + v = *s - 'A' + 10; + else + break; + if (v >= radix) + break; + n = n * radix + v; + s++; + } + + if (pend != NULL) + { + /* Skip trailing white space. */ + while (*s == ' ' || *s == '\t') + s++; + *pend = s; + } + if (neg) + return (-n); + return (n); +} + + +#if !HAVE_STRCHR + char * +strchr(s, c) + char *s; + int c; +{ + for ( ; *s != '\0'; s++) + if (*s == c) + return (s); + if (c == '\0') + return (s); + return (NULL); +} +#endif + + int +main(argc, argv) + int argc; + char *argv[]; +{ + char *arg; + char *s; + int no_more_options; + + no_more_options = 0; + while (--argc > 0) + { + arg = *++argv; + if (*arg != '-' || no_more_options) + break; + switch (*++arg) + { + case 'a': + quote_all = 1; + break; + case 'c': + closequote = *++arg; + break; + case 'd': + closequote = lstrtol(++arg, 0, &s); + if (s == arg) + pr_error("Missing number after -d"); + break; + case 'e': + if (strcmp(++arg, "-") == 0) + meta_escape = ""; + else + meta_escape = arg; + break; + case 'f': + meta_escape_buf[0] = lstrtol(++arg, 0, &s); + meta_escape = meta_escape_buf; + if (s == arg) + pr_error("Missing number after -f"); + break; + case 'o': + openquote = *++arg; + break; + case 'p': + openquote = lstrtol(++arg, 0, &s); + if (s == arg) + pr_error("Missing number after -p"); + break; + case 'm': + metachars[num_metachars++] = *++arg; + metachars[num_metachars] = '\0'; + break; + case 'n': + metachars[num_metachars++] = lstrtol(++arg, 0, &s); + if (s == arg) + pr_error("Missing number after -n"); + metachars[num_metachars] = '\0'; + break; + case '?': + pr_usage(); + return (0); + case '-': + if (*++arg == '\0') + { + no_more_options = 1; + break; + } + if (strcmp(arg, "version") == 0) + { + pr_version(); + return (0); + } + if (strcmp(arg, "help") == 0) + { + pr_usage(); + return (0); + } + pr_error("Invalid option after --"); + default: + pr_error("Invalid option letter"); + } + } + + while (argc-- > 0) + { + int has_meta = 0; + arg = *argv++; + for (s = arg; *s != '\0'; s++) + { + if (strchr(metachars, *s) != NULL) + { + has_meta = 1; + break; + } + } + if (quote_all || (has_meta && strlen(meta_escape) == 0)) + printf("%c%s%c", openquote, arg, closequote); + else + { + for (s = arg; *s != '\0'; s++) + { + if (strchr(metachars, *s) != NULL) + printf("%s", meta_escape); + printf("%c", *s); + } + } + if (argc > 0) + printf(" "); + else + printf("\n"); + } + return (0); +} diff --git a/commands/less/lesskey/Makefile b/commands/less/lesskey/Makefile new file mode 100644 index 000000000..079e2b151 --- /dev/null +++ b/commands/less/lesskey/Makefile @@ -0,0 +1,9 @@ +# $NetBSD: Makefile,v 1.5 1997/10/24 09:00:39 lukem Exp $ + +PROG= lesskey +SRCS= lesskey.c version.c +CPPFLAGS+=-I${.CURDIR}/../less + +.PATH: ${.CURDIR}/../less + +.include diff --git a/commands/less/lesskey/lesskey.1 b/commands/less/lesskey/lesskey.1 new file mode 100644 index 000000000..248ebb3f9 --- /dev/null +++ b/commands/less/lesskey/lesskey.1 @@ -0,0 +1,386 @@ +.\" $NetBSD: lesskey.1,v 1.9 2006/10/26 01:33:08 mrg Exp $ +.\" +.TH LESSKEY 1 "Version 394: 03 Dec 2005" +.SH NAME +lesskey \- specify key bindings for less +.SH SYNOPSIS +.B "lesskey [-o output] [--] [input]" +.br +.B "lesskey [--output=output] [--] [input]" +.br +.B "lesskey -V" +.br +.B "lesskey --version" +.SH DESCRIPTION +.I Lesskey +is used to specify a set of key bindings to be used by +.I less. +The input file is a text file which describes the key bindings, +If the input file is "-", standard input is read. +If no input file is specified, a standard filename is used +as the name of the input file, which depends on the system being used: +On Unix systems, $HOME/.lesskey is used; +on MS-DOS systems, $HOME/_lesskey is used; +and on OS/2 systems $HOME/lesskey.ini is used, +or $INIT/lesskey.ini if $HOME is undefined. +The output file is a binary file which is used by +.I less. +If no output file is specified, +and the environment variable LESSKEY is set, +the value of LESSKEY is used as the name of the output file. +Otherwise, a standard filename is used as the name of the output file, +which depends on the system being used: +On Unix and OS-9 systems, $HOME/.less is used; +on MS-DOS systems, $HOME/_less is used; +and on OS/2 systems, $HOME/less.ini is used, +or $INIT/less.ini if $HOME is undefined. +If the output file already exists, +.I lesskey +will overwrite it. +.PP +The -V or --version option causes +.I lesskey +to print its version number and immediately exit. +If -V or --version is present, other options and arguments are ignored. +.PP +The input file consists of one or more +.I sections. +Each section starts with a line that identifies the type of section. +Possible sections are: +.IP #command +Defines new command keys. +.IP #line-edit +Defines new line-editing keys. +.IP #env +Defines environment variables. +.PP +Blank lines and lines which start with a pound sign (#) are ignored, +except for the special section header lines. + +.SH "COMMAND SECTION" +The command section begins with the line +.sp +#command +.sp +If the command section is the first section in the file, +this line may be omitted. +The command section consists of lines of the form: +.sp + \fIstring\fP \*[Lt]whitespace\*[Gt] \fIaction\fP [extra-string] \*[Lt]newline\*[Gt] +.sp +Whitespace is any sequence of one or more spaces and/or tabs. +The \fIstring\fP is the command key(s) which invoke the action. +The \fIstring\fP may be a single command key, or a sequence of up to 15 keys. +The \fIaction\fP is the name of the less action, from the list below. +The characters in the \fIstring\fP may appear literally, or be +prefixed by a caret to indicate a control key. +A backslash followed by one to three octal digits may be used to +specify a character by its octal value. +A backslash followed by certain characters specifies input +characters as follows: +.IP \eb +BACKSPACE +.IP \ee +ESCAPE +.IP \en +NEWLINE +.IP \er +RETURN +.IP \et +TAB +.IP \eku +UP ARROW +.IP \ekd +DOWN ARROW +.IP \ekr +RIGHT ARROW +.IP \ekl +LEFT ARROW +.IP \ekU +PAGE UP +.IP \ekD +PAGE DOWN +.IP \ekh +HOME +.IP \eke +END +.IP \ekx +DELETE +.PP +A backslash followed by any other character indicates that character is +to be taken literally. +Characters which must be preceded by backslash include +caret, space, tab and the backslash itself. +.PP +An action may be followed by an "extra" string. +When such a command is entered while running +.I less, +the action is performed, and then the extra +string is parsed, just as if it were typed in to +.I less. +This feature can be used in certain cases to extend +the functionality of a command. +For example, see the "{" and ":t" commands in the example below. +The extra string has a special meaning for the "quit" action: +when +.I less +quits, first character of the extra string is used as its exit status. + +.SH EXAMPLE +The following input file describes the set of +default command keys used by less: +.sp +.nf + #command + \er forw-line + \en forw-line + e forw-line + j forw-line + \ekd forw-line + ^E forw-line + ^N forw-line + k back-line + y back-line + ^Y back-line + ^K back-line + ^P back-line + J forw-line-force + K back-line-force + Y back-line-force + d forw-scroll + ^D forw-scroll + u back-scroll + ^U back-scroll + \e40 forw-screen + f forw-screen + ^F forw-screen + ^V forw-screen + \ekD forw-screen + b back-screen + ^B back-screen + \eev back-screen + \ekU back-screen + z forw-window + w back-window + \ee\e40 forw-screen-force + F forw-forever + R repaint-flush + r repaint + ^R repaint + ^L repaint + \eeu undo-hilite + g goto-line + \ekh goto-line + \*[Lt] goto-line + \ee\*[Lt] goto-line + p percent + % percent + \ee[ left-scroll + \ee] right-scroll + \ee( left-scroll + \ee) right-scroll + { forw-bracket {} + } back-bracket {} + ( forw-bracket () + ) back-bracket () + [ forw-bracket [] + ] back-bracket [] + \ee^F forw-bracket + \ee^B back-bracket + G goto-end + \ee\*[Gt] goto-end + \*[Gt] goto-end + \eke goto-end + = status + ^G status + :f status + / forw-search + ? back-search + \ee/ forw-search * + \ee? back-search * + n repeat-search + \een repeat-search-all + N reverse-search + \eeN reverse-search-all + m set-mark + ' goto-mark + ^X^X goto-mark + E examine + :e examine + ^X^V examine + :n next-file + :p prev-file + t next-tag + T prev-tag + :x index-file + :d remove-file + - toggle-option + :t toggle-option t + s toggle-option o + _ display-option + | pipe + v visual + ! shell + + firstcmd + H help + h help + V version + 0 digit + 1 digit + 2 digit + 3 digit + 4 digit + 5 digit + 6 digit + 7 digit + 8 digit + 9 digit + q quit + Q quit + :q quit + :Q quit + ZZ quit +.fi +.sp +.SH PRECEDENCE +Commands specified by +.I lesskey +take precedence over the default commands. +A default command key may be disabled by including it in the +input file with the action "invalid". +Alternatively, a key may be defined +to do nothing by using the action "noaction". +"noaction" is similar to "invalid", but +.I less +will give an error beep for an "invalid" command, +but not for a "noaction" command. +In addition, ALL default commands may be disabled by +adding this control line to the input file: +.sp +#stop +.sp +This will cause all default commands to be ignored. +The #stop line should be the last line in that section of the file. +.PP +Be aware that #stop can be dangerous. +Since all default commands are disabled, +you must provide sufficient commands before the #stop line +to enable all necessary actions. +For example, failure to provide a "quit" command can lead to frustration. + +.SH "LINE EDITING SECTION" +The line-editing section begins with the line: +.sp +#line-edit +.sp +This section specifies new key bindings for the line editing commands, +in a manner similar to the way key bindings for +ordinary commands are specified in the #command section. +The line-editing section consists of a list of keys and actions, +one per line as in the example below. + +.SH EXAMPLE +The following input file describes the set of +default line-editing keys used by less: +.sp +.nf + #line-edit + \et forw-complete + \e17 back-complete + \ee\et back-complete + ^L expand + ^V literal + ^A literal + \eel right + \ekr right + \eeh left + \ekl left + \eeb word-left + \ee\ekl word-left + \eew word-right + \ee\ekr word-right + \eei insert + \eex delete + \ekx delete + \eeX word-delete + \eekx word-delete + \ee\eb word-backspace + \ee0 home + \ekh home + \ee$ end + \eke end + \eek up + \eku up + \eej down +.fi +.sp + +.SH "LESS ENVIRONMENT VARIABLES" +The environment variable section begins with the line +.sp +#env +.sp +Following this line is a list of environment variable assignments. +Each line consists of an environment variable name, an equals sign (=) +and the value to be assigned to the environment variable. +White space before and after the equals sign is ignored. +Variables assigned in this way are visible only to +.I less. +If a variable is specified in the system environment and also in a +lesskey file, the value in the lesskey file takes precedence. +Although the lesskey file can be used to override variables set in the +environment, the main purpose of assigning variables in the lesskey file +is simply to have all +.I less +configuration information stored in one file. + +.SH EXAMPLE +The following input file sets the -i option whenever +.I less +is run, and specifies the character set to be "latin1": +.sp +.nf + #env + LESS = -i + LESSCHARSET = latin1 +.fi +.sp + +.SH "SEE ALSO" +less(1) + +.SH WARNINGS +It is not possible to specify special keys, such as uparrow, +in a keyboard-independent manner. +The only way to specify such keys is to specify the escape sequence +which a particular keyboard sends when such a key is pressed. +.PP +On MS-DOS and OS/2 systems, certain keys send a sequence of characters +which start with a NUL character (0). +This NUL character should be represented as \e340 in a lesskey file. + +.SH COPYRIGHT +Copyright (C) 2004 Mark Nudelman +.PP +lesskey is part of the GNU project and 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. +.PP +lesskey 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. +.PP +You should have received a copy of the GNU General Public License +along with lesskey; see the file COPYING. +If not, write to the Free Software Foundation, 59 Temple Place, +Suite 330, Boston, MA 02111-1307, USA. + +.SH AUTHOR +.PP +Mark Nudelman \*[Lt]markn@greenwoodsoftware.com\*[Gt] +.br +Send bug reports or comments to the above address or to bug-less@gnu.org. + diff --git a/commands/less/lesskey/lesskey.c b/commands/less/lesskey/lesskey.c new file mode 100644 index 000000000..fded6cfb0 --- /dev/null +++ b/commands/less/lesskey/lesskey.c @@ -0,0 +1,875 @@ +/* $NetBSD: lesskey.c,v 1.9 2006/10/26 01:33:08 mrg Exp $ */ + +/* + * Copyright (C) 1984-2004 Mark Nudelman + * + * You may distribute under the terms of either the GNU General Public + * License or the Less License, as specified in the README file. + * + * For more information about less, or for information on how to + * contact the author, see the README file. + */ + + +/* + * lesskey [-o output] [input] + * + * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * + * + * Make a .less file. + * If no input file is specified, standard input is used. + * If no output file is specified, $HOME/.less is used. + * + * The .less file is used to specify (to "less") user-defined + * key bindings. Basically any sequence of 1 to MAX_CMDLEN + * keystrokes may be bound to an existing less function. + * + * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * + * + * The input file is an ascii file consisting of a + * sequence of lines of the form: + * string action [chars] + * + * "string" is a sequence of command characters which form + * the new user-defined command. The command + * characters may be: + * 1. The actual character itself. + * 2. A character preceded by ^ to specify a + * control character (e.g. ^X means control-X). + * 3. A backslash followed by one to three octal digits + * to specify a character by its octal value. + * 4. A backslash followed by b, e, n, r or t + * to specify \b, ESC, \n, \r or \t, respectively. + * 5. Any character (other than those mentioned above) preceded + * by a \ to specify the character itself (characters which + * must be preceded by \ include ^, \, and whitespace. + * "action" is the name of a "less" action, from the table below. + * "chars" is an optional sequence of characters which is treated + * as keyboard input after the command is executed. + * + * Blank lines and lines which start with # are ignored, + * except for the special control lines: + * #command Signals the beginning of the command + * keys section. + * #line-edit Signals the beginning of the line-editing + * keys section. + * #env Signals the beginning of the environment + * variable section. + * #stop Stops command parsing in less; + * causes all default keys to be disabled. + * + * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * + * + * The output file is a non-ascii file, consisting of a header, + * one or more sections, and a trailer. + * Each section begins with a section header, a section length word + * and the section data. Normally there are three sections: + * CMD_SECTION Definition of command keys. + * EDIT_SECTION Definition of editing keys. + * END_SECTION A special section header, with no + * length word or section data. + * + * Section data consists of zero or more byte sequences of the form: + * string <0> + * or + * string <0> chars <0> + * + * "string" is the command string. + * "<0>" is one null byte. + * "" is one byte containing the action code (the A_xxx value). + * If action is ORed with A_EXTRA, the action byte is followed + * by the null-terminated "chars" string. + * + * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * + */ + +#include "less.h" +#include "lesskey.h" +#include "cmd.h" + +struct cmdname +{ + char *cn_name; + int cn_action; +}; + +struct cmdname cmdnames[] = +{ + { "back-bracket", A_B_BRACKET }, + { "back-line", A_B_LINE }, + { "back-line-force", A_BF_LINE }, + { "back-screen", A_B_SCREEN }, + { "back-scroll", A_B_SCROLL }, + { "back-search", A_B_SEARCH }, + { "back-window", A_B_WINDOW }, + { "debug", A_DEBUG }, + { "digit", A_DIGIT }, + { "display-flag", A_DISP_OPTION }, + { "display-option", A_DISP_OPTION }, + { "end", A_GOEND }, + { "examine", A_EXAMINE }, + { "first-cmd", A_FIRSTCMD }, + { "firstcmd", A_FIRSTCMD }, + { "flush-repaint", A_FREPAINT }, + { "forw-bracket", A_F_BRACKET }, + { "forw-forever", A_F_FOREVER }, + { "forw-line", A_F_LINE }, + { "forw-line-force", A_FF_LINE }, + { "forw-screen", A_F_SCREEN }, + { "forw-screen-force", A_FF_SCREEN }, + { "forw-scroll", A_F_SCROLL }, + { "forw-search", A_F_SEARCH }, + { "forw-window", A_F_WINDOW }, + { "goto-end", A_GOEND }, + { "goto-line", A_GOLINE }, + { "goto-mark", A_GOMARK }, + { "help", A_HELP }, + { "index-file", A_INDEX_FILE }, + { "invalid", A_UINVALID }, + { "left-scroll", A_LSHIFT }, + { "next-file", A_NEXT_FILE }, + { "next-tag", A_NEXT_TAG }, + { "noaction", A_NOACTION }, + { "percent", A_PERCENT }, + { "pipe", A_PIPE }, + { "prev-file", A_PREV_FILE }, + { "prev-tag", A_PREV_TAG }, + { "quit", A_QUIT }, + { "remove-file", A_REMOVE_FILE }, + { "repaint", A_REPAINT }, + { "repaint-flush", A_FREPAINT }, + { "repeat-search", A_AGAIN_SEARCH }, + { "repeat-search-all", A_T_AGAIN_SEARCH }, + { "reverse-search", A_REVERSE_SEARCH }, + { "reverse-search-all", A_T_REVERSE_SEARCH }, + { "right-scroll", A_RSHIFT }, + { "set-mark", A_SETMARK }, + { "shell", A_SHELL }, + { "status", A_STAT }, + { "toggle-flag", A_OPT_TOGGLE }, + { "toggle-option", A_OPT_TOGGLE }, + { "undo-hilite", A_UNDO_SEARCH }, + { "version", A_VERSION }, + { "visual", A_VISUAL }, + { NULL, 0 } +}; + +struct cmdname editnames[] = +{ + { "back-complete", EC_B_COMPLETE }, + { "backspace", EC_BACKSPACE }, + { "delete", EC_DELETE }, + { "down", EC_DOWN }, + { "end", EC_END }, + { "expand", EC_EXPAND }, + { "forw-complete", EC_F_COMPLETE }, + { "home", EC_HOME }, + { "insert", EC_INSERT }, + { "invalid", EC_UINVALID }, + { "kill-line", EC_LINEKILL }, + { "left", EC_LEFT }, + { "literal", EC_LITERAL }, + { "right", EC_RIGHT }, + { "up", EC_UP }, + { "word-backspace", EC_W_BACKSPACE }, + { "word-delete", EC_W_DELETE }, + { "word-left", EC_W_LEFT }, + { "word-right", EC_W_RIGHT }, + { NULL, 0 } +}; + +struct table +{ + struct cmdname *names; + char *pbuffer; + char buffer[MAX_USERCMD]; +}; + +struct table cmdtable; +struct table edittable; +struct table vartable; +struct table *currtable = &cmdtable; + +char fileheader[] = { + C0_LESSKEY_MAGIC, + C1_LESSKEY_MAGIC, + C2_LESSKEY_MAGIC, + C3_LESSKEY_MAGIC +}; +char filetrailer[] = { + C0_END_LESSKEY_MAGIC, + C1_END_LESSKEY_MAGIC, + C2_END_LESSKEY_MAGIC +}; +char cmdsection[1] = { CMD_SECTION }; +char editsection[1] = { EDIT_SECTION }; +char varsection[1] = { VAR_SECTION }; +char endsection[1] = { END_SECTION }; + +char *infile = NULL; +char *outfile = NULL ; + +int linenum; +int errors; + +void terror(char *); + +extern char version[]; + + void +usage() +{ + fprintf(stderr, "usage: lesskey [-o output] [input]\n"); + exit(1); +} + + char * +mkpathname(dirname, filename) + char *dirname; + char *filename; +{ + char *pathname; + + pathname = calloc(strlen(dirname) + strlen(filename) + 2, sizeof(char)); + strcpy(pathname, dirname); + strcat(pathname, PATHNAME_SEP); + strcat(pathname, filename); + return (pathname); +} + +/* + * Figure out the name of a default file (in the user's HOME directory). + */ + char * +homefile(filename) + char *filename; +{ + char *p; + char *pathname; + + if ((p = getenv("HOME")) != NULL && *p != '\0') + pathname = mkpathname(p, filename); +#if OS2 + else if ((p = getenv("INIT")) != NULL && *p != '\0') + pathname = mkpathname(p, filename); +#endif + else + { + fprintf(stderr, "cannot find $HOME - using current directory\n"); + pathname = mkpathname(".", filename); + } + return (pathname); +} + +/* + * Parse command line arguments. + */ + void +parse_args(argc, argv) + int argc; + char **argv; +{ + char *arg; + + outfile = NULL; + while (--argc > 0) + { + arg = *++argv; + if (arg[0] != '-') + /* Arg does not start with "-"; it's not an option. */ + break; + if (arg[1] == '\0') + /* "-" means standard input. */ + break; + if (arg[1] == '-' && arg[2] == '\0') + { + /* "--" means end of options. */ + argc--; + argv++; + break; + } + switch (arg[1]) + { + case '-': + if (strncmp(arg, "--output", 8) == 0) + { + if (arg[8] == '\0') + outfile = &arg[8]; + else if (arg[8] == '=') + outfile = &arg[9]; + else + usage(); + goto opt_o; + } + if (strcmp(arg, "--version") == 0) + { + goto opt_V; + } + usage(); + break; + case 'o': + outfile = &argv[0][2]; + opt_o: + if (*outfile == '\0') + { + if (--argc <= 0) + usage(); + outfile = *(++argv); + } + break; + case 'V': + opt_V: + printf("lesskey version %s\n", version); + exit(0); + default: + usage(); + } + } + if (argc > 1) + usage(); + /* + * Open the input file, or use DEF_LESSKEYINFILE if none specified. + */ + if (argc > 0) + infile = *argv; + else + infile = homefile(DEF_LESSKEYINFILE); +} + +/* + * Initialize data structures. + */ + void +init_tables() +{ + cmdtable.names = cmdnames; + cmdtable.pbuffer = cmdtable.buffer; + + edittable.names = editnames; + edittable.pbuffer = edittable.buffer; + + vartable.names = NULL; + vartable.pbuffer = vartable.buffer; +} + +/* + * Parse one character of a string. + */ + char * +tstr(pp, xlate) + char **pp; + int xlate; +{ + register char *p; + register char ch; + register int i; + static char buf[10]; + static char tstr_control_k[] = + { SK_SPECIAL_KEY, SK_CONTROL_K, 6, 1, 1, 1, '\0' }; + + p = *pp; + switch (*p) + { + case '\\': + ++p; + switch (*p) + { + case '0': case '1': case '2': case '3': + case '4': case '5': case '6': case '7': + /* + * Parse an octal number. + */ + ch = 0; + i = 0; + do + ch = 8*ch + (*p - '0'); + while (*++p >= '0' && *p <= '7' && ++i < 3); + *pp = p; + if (xlate && ch == CONTROL('K')) + return tstr_control_k; + buf[0] = ch; + buf[1] = '\0'; + return (buf); + case 'b': + *pp = p+1; + return ("\b"); + case 'e': + *pp = p+1; + buf[0] = ESC; + buf[1] = '\0'; + return (buf); + case 'n': + *pp = p+1; + return ("\n"); + case 'r': + *pp = p+1; + return ("\r"); + case 't': + *pp = p+1; + return ("\t"); + case 'k': + if (xlate) + { + switch (*++p) + { + case 'u': ch = SK_UP_ARROW; break; + case 'd': ch = SK_DOWN_ARROW; break; + case 'r': ch = SK_RIGHT_ARROW; break; + case 'l': ch = SK_LEFT_ARROW; break; + case 'U': ch = SK_PAGE_UP; break; + case 'D': ch = SK_PAGE_DOWN; break; + case 'h': ch = SK_HOME; break; + case 'e': ch = SK_END; break; + case 'x': ch = SK_DELETE; break; + default: + terror("illegal char after \\k"); + *pp = p+1; + return (""); + } + *pp = p+1; + buf[0] = SK_SPECIAL_KEY; + buf[1] = ch; + buf[2] = 6; + buf[3] = 1; + buf[4] = 1; + buf[5] = 1; + buf[6] = '\0'; + return (buf); + } + /* FALLTHRU */ + default: + /* + * Backslash followed by any other char + * just means that char. + */ + *pp = p+1; + buf[0] = *p; + buf[1] = '\0'; + if (xlate && buf[0] == CONTROL('K')) + return tstr_control_k; + return (buf); + } + case '^': + /* + * Carat means CONTROL. + */ + *pp = p+2; + buf[0] = CONTROL(p[1]); + buf[1] = '\0'; + if (buf[0] == CONTROL('K')) + return tstr_control_k; + return (buf); + } + *pp = p+1; + buf[0] = *p; + buf[1] = '\0'; + if (xlate && buf[0] == CONTROL('K')) + return tstr_control_k; + return (buf); +} + +/* + * Skip leading spaces in a string. + */ + public char * +skipsp(s) + register char *s; +{ + while (*s == ' ' || *s == '\t') + s++; + return (s); +} + +/* + * Skip non-space characters in a string. + */ + public char * +skipnsp(s) + register char *s; +{ + while (*s != '\0' && *s != ' ' && *s != '\t') + s++; + return (s); +} + +/* + * Clean up an input line: + * strip off the trailing newline & any trailing # comment. + */ + char * +clean_line(s) + char *s; +{ + register int i; + + s = skipsp(s); + for (i = 0; s[i] != '\n' && s[i] != '\r' && s[i] != '\0'; i++) + if (s[i] == '#' && (i == 0 || s[i-1] != '\\')) + break; + s[i] = '\0'; + return (s); +} + +/* + * Add a byte to the output command table. + */ + void +add_cmd_char(c) + int c; +{ + if (currtable->pbuffer >= currtable->buffer + MAX_USERCMD) + { + terror("too many commands"); + exit(1); + } + *(currtable->pbuffer)++ = c; +} + +/* + * Add a string to the output command table. + */ + void +add_cmd_str(s) + char *s; +{ + for ( ; *s != '\0'; s++) + add_cmd_char(*s); +} + +/* + * See if we have a special "control" line. + */ + int +control_line(s) + char *s; +{ +#define PREFIX(str,pat) (strncmp(str,pat,strlen(pat)-1) == 0) + + if (PREFIX(s, "#line-edit")) + { + currtable = &edittable; + return (1); + } + if (PREFIX(s, "#command")) + { + currtable = &cmdtable; + return (1); + } + if (PREFIX(s, "#env")) + { + currtable = &vartable; + return (1); + } + if (PREFIX(s, "#stop")) + { + add_cmd_char('\0'); + add_cmd_char(A_END_LIST); + return (1); + } + return (0); +} + +/* + * Output some bytes. + */ + void +fputbytes(fd, buf, len) + FILE *fd; + char *buf; + int len; +{ + while (len-- > 0) + { + fwrite(buf, sizeof(char), 1, fd); + buf++; + } +} + +/* + * Output an integer, in special KRADIX form. + */ + void +fputint(fd, val) + FILE *fd; + unsigned int val; +{ + char c; + + if (val >= KRADIX*KRADIX) + { + fprintf(stderr, "error: integer too big (%d > %d)\n", + val, KRADIX*KRADIX); + exit(1); + } + c = val % KRADIX; + fwrite(&c, sizeof(char), 1, fd); + c = val / KRADIX; + fwrite(&c, sizeof(char), 1, fd); +} + +/* + * Find an action, given the name of the action. + */ + int +findaction(actname) + char *actname; +{ + int i; + + for (i = 0; currtable->names[i].cn_name != NULL; i++) + if (strcmp(currtable->names[i].cn_name, actname) == 0) + return (currtable->names[i].cn_action); + terror("unknown action"); + return (A_INVALID); +} + + void +terror(s) + char *s; +{ + fprintf(stderr, "line %d: %s\n", linenum, s); + errors++; +} + + + void +parse_cmdline(p) + char *p; +{ + int cmdlen; + char *actname; + int action; + char *s; + char c; + + /* + * Parse the command string and store it in the current table. + */ + cmdlen = 0; + do + { + s = tstr(&p, 1); + cmdlen += strlen(s); + if (cmdlen > MAX_CMDLEN) + terror("command too long"); + else + add_cmd_str(s); + } while (*p != ' ' && *p != '\t' && *p != '\0'); + /* + * Terminate the command string with a null byte. + */ + add_cmd_char('\0'); + + /* + * Skip white space between the command string + * and the action name. + * Terminate the action name with a null byte. + */ + p = skipsp(p); + if (*p == '\0') + { + terror("missing action"); + return; + } + actname = p; + p = skipnsp(p); + c = *p; + *p = '\0'; + + /* + * Parse the action name and store it in the current table. + */ + action = findaction(actname); + + /* + * See if an extra string follows the action name. + */ + *p = c; + p = skipsp(p); + if (*p == '\0') + { + add_cmd_char(action); + } else + { + /* + * OR the special value A_EXTRA into the action byte. + * Put the extra string after the action byte. + */ + add_cmd_char(action | A_EXTRA); + while (*p != '\0') + add_cmd_str(tstr(&p, 0)); + add_cmd_char('\0'); + } +} + + void +parse_varline(p) + char *p; +{ + char *s; + + do + { + s = tstr(&p, 0); + add_cmd_str(s); + } while (*p != ' ' && *p != '\t' && *p != '=' && *p != '\0'); + /* + * Terminate the variable name with a null byte. + */ + add_cmd_char('\0'); + + p = skipsp(p); + if (*p++ != '=') + { + terror("missing ="); + return; + } + + add_cmd_char(EV_OK|A_EXTRA); + + p = skipsp(p); + while (*p != '\0') + { + s = tstr(&p, 0); + add_cmd_str(s); + } + add_cmd_char('\0'); +} + +/* + * Parse a line from the lesskey file. + */ + void +parse_line(line) + char *line; +{ + char *p; + + /* + * See if it is a control line. + */ + if (control_line(line)) + return; + /* + * Skip leading white space. + * Replace the final newline with a null byte. + * Ignore blank lines and comments. + */ + p = clean_line(line); + if (*p == '\0') + return; + + if (currtable == &vartable) + parse_varline(p); + else + parse_cmdline(p); +} + + int +main(argc, argv) + int argc; + char *argv[]; +{ + FILE *desc; + FILE *out; + char line[1024]; + +#ifdef WIN32 + if (getenv("HOME") == NULL) + { + /* + * If there is no HOME environment variable, + * try the concatenation of HOMEDRIVE + HOMEPATH. + */ + char *drive = getenv("HOMEDRIVE"); + char *path = getenv("HOMEPATH"); + if (drive != NULL && path != NULL) + { + char *env = (char *) calloc(strlen(drive) + + strlen(path) + 6, sizeof(char)); + strcpy(env, "HOME="); + strcat(env, drive); + strcat(env, path); + putenv(env); + } + } +#endif /* WIN32 */ + + /* + * Process command line arguments. + */ + parse_args(argc, argv); + init_tables(); + + /* + * Open the input file. + */ + if (strcmp(infile, "-") == 0) + desc = stdin; + else if ((desc = fopen(infile, "r")) == NULL) + { +#if HAVE_PERROR + perror(infile); +#else + fprintf(stderr, "Cannot open %s\n", infile); +#endif + usage(); + } + + /* + * Read and parse the input file, one line at a time. + */ + errors = 0; + linenum = 0; + while (fgets(line, sizeof(line), desc) != NULL) + { + ++linenum; + parse_line(line); + } + + /* + * Write the output file. + * If no output file was specified, use "$HOME/.less" + */ + if (errors > 0) + { + fprintf(stderr, "%d errors; no output produced\n", errors); + exit(1); + } + + if (outfile == NULL) + outfile = getenv("LESSKEY"); + if (outfile == NULL) + outfile = homefile(LESSKEYFILE); + if ((out = fopen(outfile, "wb")) == NULL) + { +#if HAVE_PERROR + perror(outfile); +#else + fprintf(stderr, "Cannot open %s\n", outfile); +#endif + exit(1); + } + + /* File header */ + fputbytes(out, fileheader, sizeof(fileheader)); + + /* Command key section */ + fputbytes(out, cmdsection, sizeof(cmdsection)); + fputint(out, cmdtable.pbuffer - cmdtable.buffer); + fputbytes(out, (char *)cmdtable.buffer, cmdtable.pbuffer-cmdtable.buffer); + /* Edit key section */ + fputbytes(out, editsection, sizeof(editsection)); + fputint(out, edittable.pbuffer - edittable.buffer); + fputbytes(out, (char *)edittable.buffer, edittable.pbuffer-edittable.buffer); + + /* Environment variable section */ + fputbytes(out, varsection, sizeof(varsection)); + fputint(out, vartable.pbuffer - vartable.buffer); + fputbytes(out, (char *)vartable.buffer, vartable.pbuffer-vartable.buffer); + + /* File trailer */ + fputbytes(out, endsection, sizeof(endsection)); + fputbytes(out, filetrailer, sizeof(filetrailer)); + return (0); +} diff --git a/commands/less/lesskey/lesskey.h b/commands/less/lesskey/lesskey.h new file mode 100644 index 000000000..1734d2663 --- /dev/null +++ b/commands/less/lesskey/lesskey.h @@ -0,0 +1,40 @@ +/* + * Copyright (C) 1984-2004 Mark Nudelman + * + * You may distribute under the terms of either the GNU General Public + * License or the Less License, as specified in the README file. + * + * For more information about less, or for information on how to + * contact the author, see the README file. + */ + + +/* + * Format of a lesskey file: + * + * LESSKEY_MAGIC (4 bytes) + * sections... + * END_LESSKEY_MAGIC (4 bytes) + * + * Each section is: + * + * section_MAGIC (1 byte) + * section_length (2 bytes) + * key table (section_length bytes) + */ +#define C0_LESSKEY_MAGIC '\0' +#define C1_LESSKEY_MAGIC 'M' +#define C2_LESSKEY_MAGIC '+' +#define C3_LESSKEY_MAGIC 'G' + +#define CMD_SECTION 'c' +#define EDIT_SECTION 'e' +#define VAR_SECTION 'v' +#define END_SECTION 'x' + +#define C0_END_LESSKEY_MAGIC 'E' +#define C1_END_LESSKEY_MAGIC 'n' +#define C2_END_LESSKEY_MAGIC 'd' + +/* */ +#define KRADIX 64