Index: trunk/minix/lib/regex/COPYRIGHT =================================================================== --- trunk/minix/lib/regex/COPYRIGHT (revision 9) +++ (revision ) @@ -1,56 +1,0 @@ -Copyright 1992, 1993, 1994 Henry Spencer. All rights reserved. -This software is not subject to any license of the American Telephone -and Telegraph Company or of the Regents of the University of California. - -Permission is granted to anyone to use this software for any purpose on -any computer system, and to alter it and redistribute it, subject -to the following restrictions: - -1. The author is not responsible for the consequences of use of this - software, no matter how awful, even if they arise from flaws in it. - -2. The origin of this software must not be misrepresented, either by - explicit claim or by omission. Since few users ever read sources, - credits must appear in the documentation. - -3. Altered versions must be plainly marked as such, and must not be - misrepresented as being the original software. Since few users - ever read sources, credits must appear in the documentation. - -4. This notice may not be removed or altered. - -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= -/*- - * Copyright (c) 1994 - * The Regents of the University of California. 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. - * 3. All advertising materials mentioning features or use of this software - * must display the following acknowledgement: - * This product includes software developed by the University of - * California, Berkeley and its contributors. - * 4. Neither the name of the University nor the names of its contributors - * may be used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - * - * @(#)COPYRIGHT 8.1 (Berkeley) 3/16/94 - */ Index: trunk/minix/lib/regex/Makedepend-ack =================================================================== --- trunk/minix/lib/regex/Makedepend-ack (revision 9) +++ (revision ) @@ -1,7 +1,0 @@ -depend-ack: - rm .depend-ack - touch .depend-ack - mkdep 'cc -O -D_MINIX -D_POSIX_SOURCE -E' regcomp.c | sed -e 's:^\(.\):../obj-ack//./regex/\1:' >> .depend-ack - mkdep 'cc -O -D_MINIX -D_POSIX_SOURCE -E' regerror.c | sed -e 's:^\(.\):../obj-ack//./regex/\1:' >> .depend-ack - mkdep 'cc -O -D_MINIX -D_POSIX_SOURCE -E' regexec.c | sed -e 's:^\(.\):../obj-ack//./regex/\1:' >> .depend-ack - mkdep 'cc -O -D_MINIX -D_POSIX_SOURCE -E' regfree.c | sed -e 's:^\(.\):../obj-ack//./regex/\1:' >> .depend-ack Index: trunk/minix/lib/regex/Makedepend-gnu =================================================================== --- trunk/minix/lib/regex/Makedepend-gnu (revision 9) +++ (revision ) @@ -1,7 +1,0 @@ -depend-gnu: - rm .depend-gnu - touch .depend-gnu - mkdep 'gcc -O -D_MINIX -D_POSIX_SOURCE -E' regcomp.c | sed -e '//d' -e '//d' -e 's:^\(.\):../obj-gnu/./regex/\1:' >> .depend-gnu - mkdep 'gcc -O -D_MINIX -D_POSIX_SOURCE -E' regerror.c | sed -e '//d' -e '//d' -e 's:^\(.\):../obj-gnu/./regex/\1:' >> .depend-gnu - mkdep 'gcc -O -D_MINIX -D_POSIX_SOURCE -E' regexec.c | sed -e '//d' -e '//d' -e 's:^\(.\):../obj-gnu/./regex/\1:' >> .depend-gnu - mkdep 'gcc -O -D_MINIX -D_POSIX_SOURCE -E' regfree.c | sed -e '//d' -e '//d' -e 's:^\(.\):../obj-gnu/./regex/\1:' >> .depend-gnu Index: trunk/minix/lib/regex/Makefile =================================================================== --- trunk/minix/lib/regex/Makefile (revision 9) +++ (revision ) @@ -1,73 +1,0 @@ -#Generated from ./regex/Makefile.in -all: all-ack - -all-ack: -all-gnu: - -makefiles: Makefile -Makedepend-ack Makedepend-gnu: - sh ../generate.sh ./regex ../obj-ack/ ../obj-gnu - -Makefile: Makefile.in Makedepend-ack Makedepend-gnu - sh ../generate.sh ./regex ../obj-ack/ ../obj-gnu - @echo - @echo *Attention* - @echo Makefile is regenerated... rerun command to see changes - @echo *Attention* - @echo - -depend: depend-ack -all-ack: ../obj-ack//libc.a - -../obj-ack//libc.a: ../obj-ack//libc.a(regcomp.o) -../obj-ack//libc.a: ../obj-ack//libc.a(regerror.o) -../obj-ack//libc.a: ../obj-ack//libc.a(regexec.o) -../obj-ack//libc.a: ../obj-ack//libc.a(regfree.o) - -../obj-ack//libc.a: - ar cr ../obj-ack//libc.a ../obj-ack//./regex/*.o - rm ../obj-ack//./regex/*.o - -../obj-ack//libc.a(regcomp.o): regcomp.c - cc -O -D_MINIX -D_POSIX_SOURCE -c -o ../obj-ack//./regex/regcomp.o regcomp.c -../obj-ack//libc.a(regerror.o): regerror.c - cc -O -D_MINIX -D_POSIX_SOURCE -c -o ../obj-ack//./regex/regerror.o regerror.c -../obj-ack//libc.a(regexec.o): regexec.c - cc -O -D_MINIX -D_POSIX_SOURCE -c -o ../obj-ack//./regex/regexec.o regexec.c -../obj-ack//libc.a(regfree.o): regfree.c - cc -O -D_MINIX -D_POSIX_SOURCE -c -o ../obj-ack//./regex/regfree.o regfree.c - -all-gnu: ../obj-gnu/libc.a - -../obj-gnu/libc.a: ../obj-gnu/./regex/regcomp.o -../obj-gnu/libc.a: ../obj-gnu/./regex/regerror.o -../obj-gnu/libc.a: ../obj-gnu/./regex/regexec.o -../obj-gnu/libc.a: ../obj-gnu/./regex/regfree.o - -../obj-gnu/libc.a: - gar cr ../obj-gnu/libc.a $? - -../obj-gnu/./regex/regcomp.o: regcomp.c - gcc -O -D_MINIX -D_POSIX_SOURCE -c -o ../obj-gnu/./regex/regcomp.o regcomp.c - -../obj-gnu/./regex/regerror.o: regerror.c - gcc -O -D_MINIX -D_POSIX_SOURCE -c -o ../obj-gnu/./regex/regerror.o regerror.c - -../obj-gnu/./regex/regexec.o: regexec.c - gcc -O -D_MINIX -D_POSIX_SOURCE -c -o ../obj-gnu/./regex/regexec.o regexec.c - -../obj-gnu/./regex/regfree.o: regfree.c - gcc -O -D_MINIX -D_POSIX_SOURCE -c -o ../obj-gnu/./regex/regfree.o regfree.c - - - - -clean:: - rm -f ../obj-ack//./regex/* - rm -f ../obj-gnu/./regex/* - -include Makedepend-ack -include .depend-ack - -include Makedepend-gnu -include .depend-gnu Index: trunk/minix/lib/regex/Makefile.in =================================================================== --- trunk/minix/lib/regex/Makefile.in (revision 9) +++ (revision ) @@ -1,13 +1,0 @@ -# Makefile for lib/regex. - -CFLAGS="-O -D_MINIX -D_POSIX_SOURCE" - -LIBRARIES=libc - -libc_FILES=" \ - regcomp.c \ - regerror.c \ - regexec.c \ - regfree.c" - -TYPE=both Index: trunk/minix/lib/regex/WHATSNEW =================================================================== --- trunk/minix/lib/regex/WHATSNEW (revision 9) +++ (revision ) @@ -1,94 +1,0 @@ -# @(#)WHATSNEW 8.3 (Berkeley) 3/18/94 - -New in alpha3.4: The complex bug alluded to below has been fixed (in a -slightly kludgey temporary way that may hurt efficiency a bit; this is -another "get it out the door for 4.4" release). The tests at the end of -the tests file have accordingly been uncommented. The primary sign of -the bug was that something like a?b matching ab matched b rather than ab. -(The bug was essentially specific to this exact situation, else it would -have shown up earlier.) - -New in alpha3.3: The definition of word boundaries has been altered -slightly, to more closely match the usual programming notion that "_" -is an alphabetic. Stuff used for pre-ANSI systems is now in a subdir, -and the makefile no longer alludes to it in mysterious ways. The -makefile has generally been cleaned up some. Fixes have been made -(again!) so that the regression test will run without -DREDEBUG, at -the cost of weaker checking. A workaround for a bug in some folks' - has been added. And some more things have been added to -tests, including a couple right at the end which are commented out -because the code currently flunks them (complex bug; fix coming). -Plus the usual minor cleanup. - -New in alpha3.2: Assorted bits of cleanup and portability improvement -(the development base is now a BSDI system using GCC instead of an ancient -Sun system, and the newer compiler exposed some glitches). Fix for a -serious bug that affected REs using many [] (including REG_ICASE REs -because of the way they are implemented), *sometimes*, depending on -memory-allocation patterns. The header-file prototypes no longer name -the parameters, avoiding possible name conflicts. The possibility that -some clot has defined CHAR_MIN as (say) `-128' instead of `(-128)' is -now handled gracefully. "uchar" is no longer used as an internal type -name (too many people have the same idea). Still the same old lousy -performance, alas. - -New in alpha3.1: Basically nothing, this release is just a bookkeeping -convenience. Stay tuned. - -New in alpha3.0: Performance is no better, alas, but some fixes have been -made and some functionality has been added. (This is basically the "get -it out the door in time for 4.4" release.) One bug fix: regfree() didn't -free the main internal structure (how embarrassing). It is now possible -to put NULs in either the RE or the target string, using (resp.) a new -REG_PEND flag and the old REG_STARTEND flag. The REG_NOSPEC flag to -regcomp() makes all characters ordinary, so you can match a literal -string easily (this will become more useful when performance improves!). -There are now primitives to match beginnings and ends of words, although -the syntax is disgusting and so is the implementation. The REG_ATOI -debugging interface has changed a bit. And there has been considerable -internal cleanup of various kinds. - -New in alpha2.3: Split change list out of README, and moved flags notes -into Makefile. Macro-ized the name of regex(7) in regex(3), since it has -to change for 4.4BSD. Cleanup work in engine.c, and some new regression -tests to catch tricky cases thereof. - -New in alpha2.2: Out-of-date manpages updated. Regerror() acquires two -small extensions -- REG_ITOA and REG_ATOI -- which avoid debugging kludges -in my own test program and might be useful to others for similar purposes. -The regression test will now compile (and run) without REDEBUG. The -BRE \$ bug is fixed. Most uses of "uchar" are gone; it's all chars now. -Char/uchar parameters are now written int/unsigned, to avoid possible -portability problems with unpromoted parameters. Some unsigned casts have -been introduced to minimize portability problems with shifting into sign -bits. - -New in alpha2.1: Lots of little stuff, cleanup and fixes. The one big -thing is that regex.h is now generated, using mkh, rather than being -supplied in the distribution; due to circularities in dependencies, -you have to build regex.h explicitly by "make h". The two known bugs -have been fixed (and the regression test now checks for them), as has a -problem with assertions not being suppressed in the absence of REDEBUG. -No performance work yet. - -New in alpha2: Backslash-anything is an ordinary character, not an -error (except, of course, for the handful of backslashed metacharacters -in BREs), which should reduce script breakage. The regression test -checks *where* null strings are supposed to match, and has generally -been tightened up somewhat. Small bug fixes in parameter passing (not -harmful, but technically errors) and some other areas. Debugging -invoked by defining REDEBUG rather than not defining NDEBUG. - -New in alpha+3: full prototyping for internal routines, using a little -helper program, mkh, which extracts prototypes given in stylized comments. -More minor cleanup. Buglet fix: it's CHAR_BIT, not CHAR_BITS. Simple -pre-screening of input when a literal string is known to be part of the -RE; this does wonders for performance. - -New in alpha+2: minor bits of cleanup. Notably, the number "32" for the -word width isn't hardwired into regexec.c any more, the public header -file prototypes the functions if __STDC__ is defined, and some small typos -in the manpages have been fixed. - -New in alpha+1: improvements to the manual pages, and an important -extension, the REG_STARTEND option to regexec(). Index: trunk/minix/lib/regex/cclass.h =================================================================== --- trunk/minix/lib/regex/cclass.h (revision 9) +++ (revision ) @@ -1,70 +1,0 @@ -/*- - * Copyright (c) 1992, 1993, 1994 Henry Spencer. - * Copyright (c) 1992, 1993, 1994 - * The Regents of the University of California. All rights reserved. - * - * This code is derived from software contributed to Berkeley by - * Henry Spencer. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. All advertising materials mentioning features or use of this software - * must display the following acknowledgement: - * This product includes software developed by the University of - * California, Berkeley and its contributors. - * 4. Neither the name of the University nor the names of its contributors - * may be used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - * - * @(#)cclass.h 8.3 (Berkeley) 3/20/94 - */ - -/* character-class table */ -static struct cclass { - char *name; - char *chars; - char *multis; -} cclasses[] = { - "alnum", "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz\ -0123456789", "", - "alpha", "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz", - "", - "blank", " \t", "", - "cntrl", "\007\b\t\n\v\f\r\1\2\3\4\5\6\16\17\20\21\22\23\24\ -\25\26\27\30\31\32\33\34\35\36\37\177", "", - "digit", "0123456789", "", - "graph", "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz\ -0123456789!\"#$%&'()*+,-./:;<=>?@[\\]^_`{|}~", - "", - "lower", "abcdefghijklmnopqrstuvwxyz", - "", - "print", "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz\ -0123456789!\"#$%&'()*+,-./:;<=>?@[\\]^_`{|}~ ", - "", - "punct", "!\"#$%&'()*+,-./:;<=>?@[\\]^_`{|}~", - "", - "space", "\t\n\v\f\r ", "", - "upper", "ABCDEFGHIJKLMNOPQRSTUVWXYZ", - "", - "xdigit", "0123456789ABCDEFabcdef", - "", - NULL, 0, "" -}; Index: trunk/minix/lib/regex/cname.h =================================================================== --- trunk/minix/lib/regex/cname.h (revision 9) +++ (revision ) @@ -1,141 +1,0 @@ -/*- - * Copyright (c) 1992, 1993, 1994 Henry Spencer. - * Copyright (c) 1992, 1993, 1994 - * The Regents of the University of California. All rights reserved. - * - * This code is derived from software contributed to Berkeley by - * Henry Spencer. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. All advertising materials mentioning features or use of this software - * must display the following acknowledgement: - * This product includes software developed by the University of - * California, Berkeley and its contributors. - * 4. Neither the name of the University nor the names of its contributors - * may be used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - * - * @(#)cname.h 8.3 (Berkeley) 3/20/94 - */ - -/* character-name table */ -static struct cname { - char *name; - char code; -} cnames[] = { - "NUL", '\0', - "SOH", '\001', - "STX", '\002', - "ETX", '\003', - "EOT", '\004', - "ENQ", '\005', - "ACK", '\006', - "BEL", '\007', - "alert", '\007', - "BS", '\010', - "backspace", '\b', - "HT", '\011', - "tab", '\t', - "LF", '\012', - "newline", '\n', - "VT", '\013', - "vertical-tab", '\v', - "FF", '\014', - "form-feed", '\f', - "CR", '\015', - "carriage-return", '\r', - "SO", '\016', - "SI", '\017', - "DLE", '\020', - "DC1", '\021', - "DC2", '\022', - "DC3", '\023', - "DC4", '\024', - "NAK", '\025', - "SYN", '\026', - "ETB", '\027', - "CAN", '\030', - "EM", '\031', - "SUB", '\032', - "ESC", '\033', - "IS4", '\034', - "FS", '\034', - "IS3", '\035', - "GS", '\035', - "IS2", '\036', - "RS", '\036', - "IS1", '\037', - "US", '\037', - "space", ' ', - "exclamation-mark", '!', - "quotation-mark", '"', - "number-sign", '#', - "dollar-sign", '$', - "percent-sign", '%', - "ampersand", '&', - "apostrophe", '\'', - "left-parenthesis", '(', - "right-parenthesis", ')', - "asterisk", '*', - "plus-sign", '+', - "comma", ',', - "hyphen", '-', - "hyphen-minus", '-', - "period", '.', - "full-stop", '.', - "slash", '/', - "solidus", '/', - "zero", '0', - "one", '1', - "two", '2', - "three", '3', - "four", '4', - "five", '5', - "six", '6', - "seven", '7', - "eight", '8', - "nine", '9', - "colon", ':', - "semicolon", ';', - "less-than-sign", '<', - "equals-sign", '=', - "greater-than-sign", '>', - "question-mark", '?', - "commercial-at", '@', - "left-square-bracket", '[', - "backslash", '\\', - "reverse-solidus", '\\', - "right-square-bracket", ']', - "circumflex", '^', - "circumflex-accent", '^', - "underscore", '_', - "low-line", '_', - "grave-accent", '`', - "left-brace", '{', - "left-curly-bracket", '{', - "vertical-line", '|', - "right-brace", '}', - "right-curly-bracket", '}', - "tilde", '~', - "DEL", '\177', - NULL, 0, -}; Index: trunk/minix/lib/regex/engine.c =================================================================== --- trunk/minix/lib/regex/engine.c (revision 9) +++ (revision ) @@ -1,1091 +1,0 @@ -/*- - * Copyright (c) 1992, 1993, 1994 Henry Spencer. - * Copyright (c) 1992, 1993, 1994 - * The Regents of the University of California. All rights reserved. - * - * This code is derived from software contributed to Berkeley by - * Henry Spencer. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. All advertising materials mentioning features or use of this software - * must display the following acknowledgement: - * This product includes software developed by the University of - * California, Berkeley and its contributors. - * 4. Neither the name of the University nor the names of its contributors - * may be used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - * - * @(#)engine.c 8.5 (Berkeley) 3/20/94 - */ - -/* - * The matching engine and friends. This file is #included by regexec.c - * after suitable #defines of a variety of macros used herein, so that - * different state representations can be used without duplicating masses - * of code. - */ - -#ifdef SNAMES -#define matcher smatcher -#define fast sfast -#define slow sslow -#define dissect sdissect -#define backref sbackref -#define step sstep -#define print sprint -#define at sat -#define match smat -#endif -#ifdef LNAMES -#define matcher lmatcher -#define fast lfast -#define slow lslow -#define dissect ldissect -#define backref lbackref -#define step lstep -#define print lprint -#define at lat -#define match lmat -#endif - -/* another structure passed up and down to avoid zillions of parameters */ -struct match { - struct re_guts *g; - int eflags; - regmatch_t *pmatch; /* [nsub+1] (0 element unused) */ - char *offp; /* offsets work from here */ - char *beginp; /* start of string -- virtual NUL precedes */ - char *endp; /* end of string -- virtual NUL here */ - char *coldp; /* can be no match starting before here */ - char **lastpos; /* [nplus+1] */ - STATEVARS; - states st; /* current states */ - states fresh; /* states for a fresh start */ - states tmp; /* temporary */ - states empty; /* empty set of states */ -}; - -/* ========= begin header generated by ./mkh ========= */ -#ifdef __cplusplus -extern "C" { -#endif - -/* === engine.c === */ -static int matcher(struct re_guts *g, char *string, size_t nmatch, regmatch_t pmatch[], int eflags); -static char *dissect(struct match *m, char *start, char *stop, sopno startst, sopno stopst); -static char *backref(struct match *m, char *start, char *stop, sopno startst, sopno stopst, sopno lev); -static char *fast(struct match *m, char *start, char *stop, sopno startst, sopno stopst); -static char *slow(struct match *m, char *start, char *stop, sopno startst, sopno stopst); -static states step(struct re_guts *g, sopno start, sopno stop, states bef, int ch, states aft); -#define BOL (OUT+1) -#define EOL (BOL+1) -#define BOLEOL (BOL+2) -#define NOTHING (BOL+3) -#define BOW (BOL+4) -#define EOW (BOL+5) -#define CODEMAX (BOL+5) /* highest code used */ -#define NONCHAR(c) ((c) > CHAR_MAX) -#define NNONCHAR (CODEMAX-CHAR_MAX) -#ifdef REDEBUG -static void print(struct match *m, char *caption, states st, int ch, FILE *d); -#endif -#ifdef REDEBUG -static void at(struct match *m, char *title, char *start, char *stop, sopno startst, sopno stopst); -#endif -#ifdef REDEBUG -static char *pchar(int ch); -#endif - -#ifdef __cplusplus -} -#endif -/* ========= end header generated by ./mkh ========= */ - -#ifdef REDEBUG -#define SP(t, s, c) print(m, t, s, c, stdout) -#define AT(t, p1, p2, s1, s2) at(m, t, p1, p2, s1, s2) -#define NOTE(str) { if (m->eflags®_TRACE) printf("=%s\n", (str)); } -#else -#define SP(t, s, c) /* nothing */ -#define AT(t, p1, p2, s1, s2) /* nothing */ -#define NOTE(s) /* nothing */ -#endif - -/* - - matcher - the actual matching engine - == static int matcher(register struct re_guts *g, char *string, \ - == size_t nmatch, regmatch_t pmatch[], int eflags); - */ -static int /* 0 success, REG_NOMATCH failure */ -matcher(g, string, nmatch, pmatch, eflags) -register struct re_guts *g; -char *string; -size_t nmatch; -regmatch_t pmatch[]; -int eflags; -{ - register char *endp; - register int i; - struct match mv; - register struct match *m = &mv; - register char *dp; - const register sopno gf = g->firststate+1; /* +1 for OEND */ - const register sopno gl = g->laststate; - char *start; - char *stop; - - /* simplify the situation where possible */ - if (g->cflags®_NOSUB) - nmatch = 0; - if (eflags®_STARTEND) { - start = string + pmatch[0].rm_so; - stop = string + pmatch[0].rm_eo; - } else { - start = string; - stop = start + strlen(start); - } - if (stop < start) - return(REG_INVARG); - - /* prescreening; this does wonders for this rather slow code */ - if (g->must != NULL) { - for (dp = start; dp < stop; dp++) - if (*dp == g->must[0] && stop - dp >= g->mlen && - memcmp(dp, g->must, (size_t)g->mlen) == 0) - break; - if (dp == stop) /* we didn't find g->must */ - return(REG_NOMATCH); - } - - /* match struct setup */ - m->g = g; - m->eflags = eflags; - m->pmatch = NULL; - m->lastpos = NULL; - m->offp = string; - m->beginp = start; - m->endp = stop; - STATESETUP(m, 4); - SETUP(m->st); - SETUP(m->fresh); - SETUP(m->tmp); - SETUP(m->empty); - CLEAR(m->empty); - - /* this loop does only one repetition except for backrefs */ - for (;;) { - endp = fast(m, start, stop, gf, gl); - if (endp == NULL) { /* a miss */ - STATETEARDOWN(m); - return(REG_NOMATCH); - } - if (nmatch == 0 && !g->backrefs) - break; /* no further info needed */ - - /* where? */ - assert(m->coldp != NULL); - for (;;) { - NOTE("finding start"); - endp = slow(m, m->coldp, stop, gf, gl); - if (endp != NULL) - break; - assert(m->coldp < m->endp); - m->coldp++; - } - if (nmatch == 1 && !g->backrefs) - break; /* no further info needed */ - - /* oh my, he wants the subexpressions... */ - if (m->pmatch == NULL) - m->pmatch = (regmatch_t *)malloc((m->g->nsub + 1) * - sizeof(regmatch_t)); - if (m->pmatch == NULL) { - STATETEARDOWN(m); - return(REG_ESPACE); - } - for (i = 1; i <= m->g->nsub; i++) - m->pmatch[i].rm_so = m->pmatch[i].rm_eo = -1; - if (!g->backrefs && !(m->eflags®_BACKR)) { - NOTE("dissecting"); - dp = dissect(m, m->coldp, endp, gf, gl); - } else { - if (g->nplus > 0 && m->lastpos == NULL) - m->lastpos = (char **)malloc((g->nplus+1) * - sizeof(char *)); - if (g->nplus > 0 && m->lastpos == NULL) { - free(m->pmatch); - STATETEARDOWN(m); - return(REG_ESPACE); - } - NOTE("backref dissect"); - dp = backref(m, m->coldp, endp, gf, gl, (sopno)0); - } - if (dp != NULL) - break; - - /* uh-oh... we couldn't find a subexpression-level match */ - assert(g->backrefs); /* must be back references doing it */ - assert(g->nplus == 0 || m->lastpos != NULL); - for (;;) { - if (dp != NULL || endp <= m->coldp) - break; /* defeat */ - NOTE("backoff"); - endp = slow(m, m->coldp, endp-1, gf, gl); - if (endp == NULL) - break; /* defeat */ - /* try it on a shorter possibility */ -#ifndef NDEBUG - for (i = 1; i <= m->g->nsub; i++) { - assert(m->pmatch[i].rm_so == -1); - assert(m->pmatch[i].rm_eo == -1); - } -#endif - NOTE("backoff dissect"); - dp = backref(m, m->coldp, endp, gf, gl, (sopno)0); - } - assert(dp == NULL || dp == endp); - if (dp != NULL) /* found a shorter one */ - break; - - /* despite initial appearances, there is no match here */ - NOTE("false alarm"); - start = m->coldp + 1; /* recycle starting later */ - assert(start <= stop); - } - - /* fill in the details if requested */ - if (nmatch > 0) { - pmatch[0].rm_so = m->coldp - m->offp; - pmatch[0].rm_eo = endp - m->offp; - } - if (nmatch > 1) { - assert(m->pmatch != NULL); - for (i = 1; i < nmatch; i++) - if (i <= m->g->nsub) - pmatch[i] = m->pmatch[i]; - else { - pmatch[i].rm_so = -1; - pmatch[i].rm_eo = -1; - } - } - - if (m->pmatch != NULL) - free((char *)m->pmatch); - if (m->lastpos != NULL) - free((char *)m->lastpos); - STATETEARDOWN(m); - return(0); -} - -/* - - dissect - figure out what matched what, no back references - == static char *dissect(register struct match *m, char *start, \ - == char *stop, sopno startst, sopno stopst); - */ -static char * /* == stop (success) always */ -dissect(m, start, stop, startst, stopst) -register struct match *m; -char *start; -char *stop; -sopno startst; -sopno stopst; -{ - register int i; - register sopno ss; /* start sop of current subRE */ - register sopno es; /* end sop of current subRE */ - register char *sp; /* start of string matched by it */ - register char *stp; /* string matched by it cannot pass here */ - register char *rest; /* start of rest of string */ - register char *tail; /* string unmatched by rest of RE */ - register sopno ssub; /* start sop of subsubRE */ - register sopno esub; /* end sop of subsubRE */ - register char *ssp; /* start of string matched by subsubRE */ - register char *sep; /* end of string matched by subsubRE */ - register char *oldssp; /* previous ssp */ - register char *dp; - - AT("diss", start, stop, startst, stopst); - sp = start; - for (ss = startst; ss < stopst; ss = es) { - /* identify end of subRE */ - es = ss; - switch (OP(m->g->strip[es])) { - case OPLUS_: - case OQUEST_: - es += OPND(m->g->strip[es]); - break; - case OCH_: - while (OP(m->g->strip[es]) != O_CH) - es += OPND(m->g->strip[es]); - break; - } - es++; - - /* figure out what it matched */ - switch (OP(m->g->strip[ss])) { - case OEND: - assert(nope); - break; - case OCHAR: - sp++; - break; - case OBOL: - case OEOL: - case OBOW: - case OEOW: - break; - case OANY: - case OANYOF: - sp++; - break; - case OBACK_: - case O_BACK: - assert(nope); - break; - /* cases where length of match is hard to find */ - case OQUEST_: - stp = stop; - for (;;) { - /* how long could this one be? */ - rest = slow(m, sp, stp, ss, es); - assert(rest != NULL); /* it did match */ - /* could the rest match the rest? */ - tail = slow(m, rest, stop, es, stopst); - if (tail == stop) - break; /* yes! */ - /* no -- try a shorter match for this one */ - stp = rest - 1; - assert(stp >= sp); /* it did work */ - } - ssub = ss + 1; - esub = es - 1; - /* did innards match? */ - if (slow(m, sp, rest, ssub, esub) != NULL) { - dp = dissect(m, sp, rest, ssub, esub); - assert(dp == rest); - } else /* no */ - assert(sp == rest); - sp = rest; - break; - case OPLUS_: - stp = stop; - for (;;) { - /* how long could this one be? */ - rest = slow(m, sp, stp, ss, es); - assert(rest != NULL); /* it did match */ - /* could the rest match the rest? */ - tail = slow(m, rest, stop, es, stopst); - if (tail == stop) - break; /* yes! */ - /* no -- try a shorter match for this one */ - stp = rest - 1; - assert(stp >= sp); /* it did work */ - } - ssub = ss + 1; - esub = es - 1; - ssp = sp; - oldssp = ssp; - for (;;) { /* find last match of innards */ - sep = slow(m, ssp, rest, ssub, esub); - if (sep == NULL || sep == ssp) - break; /* failed or matched null */ - oldssp = ssp; /* on to next try */ - ssp = sep; - } - if (sep == NULL) { - /* last successful match */ - sep = ssp; - ssp = oldssp; - } - assert(sep == rest); /* must exhaust substring */ - assert(slow(m, ssp, sep, ssub, esub) == rest); - dp = dissect(m, ssp, sep, ssub, esub); - assert(dp == sep); - sp = rest; - break; - case OCH_: - stp = stop; - for (;;) { - /* how long could this one be? */ - rest = slow(m, sp, stp, ss, es); - assert(rest != NULL); /* it did match */ - /* could the rest match the rest? */ - tail = slow(m, rest, stop, es, stopst); - if (tail == stop) - break; /* yes! */ - /* no -- try a shorter match for this one */ - stp = rest - 1; - assert(stp >= sp); /* it did work */ - } - ssub = ss + 1; - esub = ss + OPND(m->g->strip[ss]) - 1; - assert(OP(m->g->strip[esub]) == OOR1); - for (;;) { /* find first matching branch */ - if (slow(m, sp, rest, ssub, esub) == rest) - break; /* it matched all of it */ - /* that one missed, try next one */ - assert(OP(m->g->strip[esub]) == OOR1); - esub++; - assert(OP(m->g->strip[esub]) == OOR2); - ssub = esub + 1; - esub += OPND(m->g->strip[esub]); - if (OP(m->g->strip[esub]) == OOR2) - esub--; - else - assert(OP(m->g->strip[esub]) == O_CH); - } - dp = dissect(m, sp, rest, ssub, esub); - assert(dp == rest); - sp = rest; - break; - case O_PLUS: - case O_QUEST: - case OOR1: - case OOR2: - case O_CH: - assert(nope); - break; - case OLPAREN: - i = OPND(m->g->strip[ss]); - assert(0 < i && i <= m->g->nsub); - m->pmatch[i].rm_so = sp - m->offp; - break; - case ORPAREN: - i = OPND(m->g->strip[ss]); - assert(0 < i && i <= m->g->nsub); - m->pmatch[i].rm_eo = sp - m->offp; - break; - default: /* uh oh */ - assert(nope); - break; - } - } - - assert(sp == stop); - return(sp); -} - -/* - - backref - figure out what matched what, figuring in back references - == static char *backref(register struct match *m, char *start, \ - == char *stop, sopno startst, sopno stopst, sopno lev); - */ -static char * /* == stop (success) or NULL (failure) */ -backref(m, start, stop, startst, stopst, lev) -register struct match *m; -char *start; -char *stop; -sopno startst; -sopno stopst; -sopno lev; /* PLUS nesting level */ -{ - register int i; - register sopno ss; /* start sop of current subRE */ - register char *sp; /* start of string matched by it */ - register sopno ssub; /* start sop of subsubRE */ - register sopno esub; /* end sop of subsubRE */ - register char *ssp; /* start of string matched by subsubRE */ - register char *dp; - register size_t len; - register int hard; - register sop s; - register regoff_t offsave; - register cset *cs; - - AT("back", start, stop, startst, stopst); - sp = start; - - /* get as far as we can with easy stuff */ - hard = 0; - for (ss = startst; !hard && ss < stopst; ss++) - switch (OP(s = m->g->strip[ss])) { - case OCHAR: - if (sp == stop || *sp++ != (char)OPND(s)) - return(NULL); - break; - case OANY: - if (sp == stop) - return(NULL); - sp++; - break; - case OANYOF: - cs = &m->g->sets[OPND(s)]; - if (sp == stop || !CHIN(cs, *sp++)) - return(NULL); - break; - case OBOL: - if ( (sp == m->beginp && !(m->eflags®_NOTBOL)) || - (sp < m->endp && *(sp-1) == '\n' && - (m->g->cflags®_NEWLINE)) ) - { /* yes */ } - else - return(NULL); - break; - case OEOL: - if ( (sp == m->endp && !(m->eflags®_NOTEOL)) || - (sp < m->endp && *sp == '\n' && - (m->g->cflags®_NEWLINE)) ) - { /* yes */ } - else - return(NULL); - break; - case OBOW: - if (( (sp == m->beginp && !(m->eflags®_NOTBOL)) || - (sp < m->endp && *(sp-1) == '\n' && - (m->g->cflags®_NEWLINE)) || - (sp > m->beginp && - !ISWORD(*(sp-1))) ) && - (sp < m->endp && ISWORD(*sp)) ) - { /* yes */ } - else - return(NULL); - break; - case OEOW: - if (( (sp == m->endp && !(m->eflags®_NOTEOL)) || - (sp < m->endp && *sp == '\n' && - (m->g->cflags®_NEWLINE)) || - (sp < m->endp && !ISWORD(*sp)) ) && - (sp > m->beginp && ISWORD(*(sp-1))) ) - { /* yes */ } - else - return(NULL); - break; - case O_QUEST: - break; - case OOR1: /* matches null but needs to skip */ - ss++; - s = m->g->strip[ss]; - do { - assert(OP(s) == OOR2); - ss += OPND(s); - } while (OP(s = m->g->strip[ss]) != O_CH); - /* note that the ss++ gets us past the O_CH */ - break; - default: /* have to make a choice */ - hard = 1; - break; - } - if (!hard) { /* that was it! */ - if (sp != stop) - return(NULL); - return(sp); - } - ss--; /* adjust for the for's final increment */ - - /* the hard stuff */ - AT("hard", sp, stop, ss, stopst); - s = m->g->strip[ss]; - switch (OP(s)) { - case OBACK_: /* the vilest depths */ - i = OPND(s); - assert(0 < i && i <= m->g->nsub); - if (m->pmatch[i].rm_eo == -1) - return(NULL); - assert(m->pmatch[i].rm_so != -1); - len = m->pmatch[i].rm_eo - m->pmatch[i].rm_so; - assert(stop - m->beginp >= len); - if (sp > stop - len) - return(NULL); /* not enough left to match */ - ssp = m->offp + m->pmatch[i].rm_so; - if (memcmp(sp, ssp, len) != 0) - return(NULL); - while (m->g->strip[ss] != SOP(O_BACK, i)) - ss++; - return(backref(m, sp+len, stop, ss+1, stopst, lev)); - break; - case OQUEST_: /* to null or not */ - dp = backref(m, sp, stop, ss+1, stopst, lev); - if (dp != NULL) - return(dp); /* not */ - return(backref(m, sp, stop, ss+OPND(s)+1, stopst, lev)); - break; - case OPLUS_: - assert(m->lastpos != NULL); - assert(lev+1 <= m->g->nplus); - m->lastpos[lev+1] = sp; - return(backref(m, sp, stop, ss+1, stopst, lev+1)); - break; - case O_PLUS: - if (sp == m->lastpos[lev]) /* last pass matched null */ - return(backref(m, sp, stop, ss+1, stopst, lev-1)); - /* try another pass */ - m->lastpos[lev] = sp; - dp = backref(m, sp, stop, ss-OPND(s)+1, stopst, lev); - if (dp == NULL) - return(backref(m, sp, stop, ss+1, stopst, lev-1)); - else - return(dp); - break; - case OCH_: /* find the right one, if any */ - ssub = ss + 1; - esub = ss + OPND(s) - 1; - assert(OP(m->g->strip[esub]) == OOR1); - for (;;) { /* find first matching branch */ - dp = backref(m, sp, stop, ssub, esub, lev); - if (dp != NULL) - return(dp); - /* that one missed, try next one */ - if (OP(m->g->strip[esub]) == O_CH) - return(NULL); /* there is none */ - esub++; - assert(OP(m->g->strip[esub]) == OOR2); - ssub = esub + 1; - esub += OPND(m->g->strip[esub]); - if (OP(m->g->strip[esub]) == OOR2) - esub--; - else - assert(OP(m->g->strip[esub]) == O_CH); - } - break; - case OLPAREN: /* must undo assignment if rest fails */ - i = OPND(s); - assert(0 < i && i <= m->g->nsub); - offsave = m->pmatch[i].rm_so; - m->pmatch[i].rm_so = sp - m->offp; - dp = backref(m, sp, stop, ss+1, stopst, lev); - if (dp != NULL) - return(dp); - m->pmatch[i].rm_so = offsave; - return(NULL); - break; - case ORPAREN: /* must undo assignment if rest fails */ - i = OPND(s); - assert(0 < i && i <= m->g->nsub); - offsave = m->pmatch[i].rm_eo; - m->pmatch[i].rm_eo = sp - m->offp; - dp = backref(m, sp, stop, ss+1, stopst, lev); - if (dp != NULL) - return(dp); - m->pmatch[i].rm_eo = offsave; - return(NULL); - break; - default: /* uh oh */ - assert(nope); - break; - } - - /* "can't happen" */ - assert(nope); - /* NOTREACHED */ -} - -/* - - fast - step through the string at top speed - == static char *fast(register struct match *m, char *start, \ - == char *stop, sopno startst, sopno stopst); - */ -static char * /* where tentative match ended, or NULL */ -fast(m, start, stop, startst, stopst) -register struct match *m; -char *start; -char *stop; -sopno startst; -sopno stopst; -{ - register states st = m->st; - register states fresh = m->fresh; - register states tmp = m->tmp; - register char *p = start; - register int c = (start == m->beginp) ? OUT : *(start-1); - register int lastc; /* previous c */ - register int flagch; - register int i; - register char *coldp; /* last p after which no match was underway */ - - CLEAR(st); - SET1(st, startst); - st = step(m->g, startst, stopst, st, NOTHING, st); - ASSIGN(fresh, st); - SP("start", st, *p); - coldp = NULL; - for (;;) { - /* next character */ - lastc = c; - c = (p == m->endp) ? OUT : *p; - if (EQ(st, fresh)) - coldp = p; - - /* is there an EOL and/or BOL between lastc and c? */ - flagch = '\0'; - i = 0; - if ( (lastc == '\n' && m->g->cflags®_NEWLINE) || - (lastc == OUT && !(m->eflags®_NOTBOL)) ) { - flagch = BOL; - i = m->g->nbol; - } - if ( (c == '\n' && m->g->cflags®_NEWLINE) || - (c == OUT && !(m->eflags®_NOTEOL)) ) { - flagch = (flagch == BOL) ? BOLEOL : EOL; - i += m->g->neol; - } - if (i != 0) { - for (; i > 0; i--) - st = step(m->g, startst, stopst, st, flagch, st); - SP("boleol", st, c); - } - - /* how about a word boundary? */ - if ( (flagch == BOL || (lastc != OUT && !ISWORD(lastc))) && - (c != OUT && ISWORD(c)) ) { - flagch = BOW; - } - if ( (lastc != OUT && ISWORD(lastc)) && - (flagch == EOL || (c != OUT && !ISWORD(c))) ) { - flagch = EOW; - } - if (flagch == BOW || flagch == EOW) { - st = step(m->g, startst, stopst, st, flagch, st); - SP("boweow", st, c); - } - - /* are we done? */ - if (ISSET(st, stopst) || p == stop) - break; /* NOTE BREAK OUT */ - - /* no, we must deal with this character */ - ASSIGN(tmp, st); - ASSIGN(st, fresh); - assert(c != OUT); - st = step(m->g, startst, stopst, tmp, c, st); - SP("aft", st, c); - assert(EQ(step(m->g, startst, stopst, st, NOTHING, st), st)); - p++; - } - - assert(coldp != NULL); - m->coldp = coldp; - if (ISSET(st, stopst)) - return(p+1); - else - return(NULL); -} - -/* - - slow - step through the string more deliberately - == static char *slow(register struct match *m, char *start, \ - == char *stop, sopno startst, sopno stopst); - */ -static char * /* where it ended */ -slow(m, start, stop, startst, stopst) -register struct match *m; -char *start; -char *stop; -sopno startst; -sopno stopst; -{ - register states st = m->st; - register states empty = m->empty; - register states tmp = m->tmp; - register char *p = start; - register int c = (start == m->beginp) ? OUT : *(start-1); - register int lastc; /* previous c */ - register int flagch; - register int i; - register char *matchp; /* last p at which a match ended */ - - AT("slow", start, stop, startst, stopst); - CLEAR(st); - SET1(st, startst); - SP("sstart", st, *p); - st = step(m->g, startst, stopst, st, NOTHING, st); - matchp = NULL; - for (;;) { - /* next character */ - lastc = c; - c = (p == m->endp) ? OUT : *p; - - /* is there an EOL and/or BOL between lastc and c? */ - flagch = '\0'; - i = 0; - if ( (lastc == '\n' && m->g->cflags®_NEWLINE) || - (lastc == OUT && !(m->eflags®_NOTBOL)) ) { - flagch = BOL; - i = m->g->nbol; - } - if ( (c == '\n' && m->g->cflags®_NEWLINE) || - (c == OUT && !(m->eflags®_NOTEOL)) ) { - flagch = (flagch == BOL) ? BOLEOL : EOL; - i += m->g->neol; - } - if (i != 0) { - for (; i > 0; i--) - st = step(m->g, startst, stopst, st, flagch, st); - SP("sboleol", st, c); - } - - /* how about a word boundary? */ - if ( (flagch == BOL || (lastc != OUT && !ISWORD(lastc))) && - (c != OUT && ISWORD(c)) ) { - flagch = BOW; - } - if ( (lastc != OUT && ISWORD(lastc)) && - (flagch == EOL || (c != OUT && !ISWORD(c))) ) { - flagch = EOW; - } - if (flagch == BOW || flagch == EOW) { - st = step(m->g, startst, stopst, st, flagch, st); - SP("sboweow", st, c); - } - - /* are we done? */ - if (ISSET(st, stopst)) - matchp = p; - if (EQ(st, empty) || p == stop) - break; /* NOTE BREAK OUT */ - - /* no, we must deal with this character */ - ASSIGN(tmp, st); - ASSIGN(st, empty); - assert(c != OUT); - st = step(m->g, startst, stopst, tmp, c, st); - SP("saft", st, c); - assert(EQ(step(m->g, startst, stopst, st, NOTHING, st), st)); - p++; - } - - return(matchp); -} - - -/* - - step - map set of states reachable before char to set reachable after - == static states step(register struct re_guts *g, sopno start, sopno stop, \ - == register states bef, int ch, register states aft); - == #define BOL (OUT+1) - == #define EOL (BOL+1) - == #define BOLEOL (BOL+2) - == #define NOTHING (BOL+3) - == #define BOW (BOL+4) - == #define EOW (BOL+5) - == #define CODEMAX (BOL+5) // highest code used - == #define NONCHAR(c) ((c) > CHAR_MAX) - == #define NNONCHAR (CODEMAX-CHAR_MAX) - */ -static states -step(g, start, stop, bef, ch, aft) -register struct re_guts *g; -sopno start; /* start state within strip */ -sopno stop; /* state after stop state within strip */ -register states bef; /* states reachable before */ -int ch; /* character or NONCHAR code */ -register states aft; /* states already known reachable after */ -{ - register cset *cs; - register sop s; - register sopno pc; - register onestate here; /* note, macros know this name */ - register sopno look; - register int i; - - for (pc = start, INIT(here, pc); pc != stop; pc++, INC(here)) { - s = g->strip[pc]; - switch (OP(s)) { - case OEND: - assert(pc == stop-1); - break; - case OCHAR: - /* only characters can match */ - assert(!NONCHAR(ch) || ch != (char)OPND(s)); - if (ch == (char)OPND(s)) - FWD(aft, bef, 1); - break; - case OBOL: - if (ch == BOL || ch == BOLEOL) - FWD(aft, bef, 1); - break; - case OEOL: - if (ch == EOL || ch == BOLEOL) - FWD(aft, bef, 1); - break; - case OBOW: - if (ch == BOW) - FWD(aft, bef, 1); - break; - case OEOW: - if (ch == EOW) - FWD(aft, bef, 1); - break; - case OANY: - if (!NONCHAR(ch)) - FWD(aft, bef, 1); - break; - case OANYOF: - cs = &g->sets[OPND(s)]; - if (!NONCHAR(ch) && CHIN(cs, ch)) - FWD(aft, bef, 1); - break; - case OBACK_: /* ignored here */ - case O_BACK: - FWD(aft, aft, 1); - break; - case OPLUS_: /* forward, this is just an empty */ - FWD(aft, aft, 1); - break; - case O_PLUS: /* both forward and back */ - FWD(aft, aft, 1); - i = ISSETBACK(aft, OPND(s)); - BACK(aft, aft, OPND(s)); - if (!i && ISSETBACK(aft, OPND(s))) { - /* oho, must reconsider loop body */ - pc -= OPND(s) + 1; - INIT(here, pc); - } - break; - case OQUEST_: /* two branches, both forward */ - FWD(aft, aft, 1); - FWD(aft, aft, OPND(s)); - break; - case O_QUEST: /* just an empty */ - FWD(aft, aft, 1); - break; - case OLPAREN: /* not significant here */ - case ORPAREN: - FWD(aft, aft, 1); - break; - case OCH_: /* mark the first two branches */ - FWD(aft, aft, 1); - assert(OP(g->strip[pc+OPND(s)]) == OOR2); - FWD(aft, aft, OPND(s)); - break; - case OOR1: /* done a branch, find the O_CH */ - if (ISSTATEIN(aft, here)) { - for (look = 1; - OP(s = g->strip[pc+look]) != O_CH; - look += OPND(s)) - assert(OP(s) == OOR2); - FWD(aft, aft, look); - } - break; - case OOR2: /* propagate OCH_'s marking */ - FWD(aft, aft, 1); - if (OP(g->strip[pc+OPND(s)]) != O_CH) { - assert(OP(g->strip[pc+OPND(s)]) == OOR2); - FWD(aft, aft, OPND(s)); - } - break; - case O_CH: /* just empty */ - FWD(aft, aft, 1); - break; - default: /* ooooops... */ - assert(nope); - break; - } - } - - return(aft); -} - -#ifdef REDEBUG -/* - - print - print a set of states - == #ifdef REDEBUG - == static void print(struct match *m, char *caption, states st, \ - == int ch, FILE *d); - == #endif - */ -static void -print(m, caption, st, ch, d) -struct match *m; -char *caption; -states st; -int ch; -FILE *d; -{ - register struct re_guts *g = m->g; - register int i; - register int first = 1; - - if (!(m->eflags®_TRACE)) - return; - - fprintf(d, "%s", caption); - if (ch != '\0') - fprintf(d, " %s", pchar(ch)); - for (i = 0; i < g->nstates; i++) - if (ISSET(st, i)) { - fprintf(d, "%s%d", (first) ? "\t" : ", ", i); - first = 0; - } - fprintf(d, "\n"); -} - -/* - - at - print current situation - == #ifdef REDEBUG - == static void at(struct match *m, char *title, char *start, char *stop, \ - == sopno startst, sopno stopst); - == #endif - */ -static void -at(m, title, start, stop, startst, stopst) -struct match *m; -char *title; -char *start; -char *stop; -sopno startst; -sopno stopst; -{ - if (!(m->eflags®_TRACE)) - return; - - printf("%s %s-", title, pchar(*start)); - printf("%s ", pchar(*stop)); - printf("%ld-%ld\n", (long)startst, (long)stopst); -} - -#ifndef PCHARDONE -#define PCHARDONE /* never again */ -/* - - pchar - make a character printable - == #ifdef REDEBUG - == static char *pchar(int ch); - == #endif - * - * Is this identical to regchar() over in debug.c? Well, yes. But a - * duplicate here avoids having a debugging-capable regexec.o tied to - * a matching debug.o, and this is convenient. It all disappears in - * the non-debug compilation anyway, so it doesn't matter much. - */ -static char * /* -> representation */ -pchar(ch) -int ch; -{ - static char pbuf[10]; - - if (isprint(ch) || ch == ' ') - sprintf(pbuf, "%c", ch); - else - sprintf(pbuf, "\\%o", ch); - return(pbuf); -} -#endif -#endif - -#undef matcher -#undef fast -#undef slow -#undef dissect -#undef backref -#undef step -#undef print -#undef at -#undef match Index: trunk/minix/lib/regex/re_format.7 =================================================================== --- trunk/minix/lib/regex/re_format.7 (revision 9) +++ (revision ) @@ -1,269 +1,0 @@ -.\" Copyright (c) 1992, 1993, 1994 Henry Spencer. -.\" Copyright (c) 1992, 1993, 1994 -.\" The Regents of the University of California. All rights reserved. -.\" -.\" This code is derived from software contributed to Berkeley by -.\" Henry Spencer. -.\" -.\" Redistribution and use in source and binary forms, with or without -.\" modification, are permitted provided that the following conditions -.\" are met: -.\" 1. Redistributions of source code must retain the above copyright -.\" notice, this list of conditions and the following disclaimer. -.\" 2. Redistributions in binary form must reproduce the above copyright -.\" notice, this list of conditions and the following disclaimer in the -.\" documentation and/or other materials provided with the distribution. -.\" 3. All advertising materials mentioning features or use of this software -.\" must display the following acknowledgement: -.\" This product includes software developed by the University of -.\" California, Berkeley and its contributors. -.\" 4. Neither the name of the University nor the names of its contributors -.\" may be used to endorse or promote products derived from this software -.\" without specific prior written permission. -.\" -.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND -.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE -.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE -.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE -.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL -.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS -.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) -.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT -.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY -.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF -.\" SUCH DAMAGE. -.\" -.\" @(#)re_format.7 8.3 (Berkeley) 3/20/94 -.\" -.TH RE_FORMAT 7 "March 20, 1994" -.SH NAME -re_format \- POSIX 1003.2 regular expressions -.SH DESCRIPTION -Regular expressions (``RE''s), -as defined in POSIX 1003.2, come in two forms: -modern REs (roughly those of -.BR egrep ; -1003.2 calls these ``extended'' REs) -and obsolete REs (roughly those of -.BR ed ; -1003.2 ``basic'' REs). -Obsolete REs mostly exist for backward compatibility in some old programs; -they will be discussed at the end. -1003.2 leaves some aspects of RE syntax and semantics open; -`\(dg' marks decisions on these aspects that -may not be fully portable to other 1003.2 implementations. -.PP -A (modern) RE is one\(dg or more non-empty\(dg \fIbranches\fR, -separated by `|'. -It matches anything that matches one of the branches. -.PP -A branch is one\(dg or more \fIpieces\fR, concatenated. -It matches a match for the first, followed by a match for the second, etc. -.PP -A piece is an \fIatom\fR possibly followed -by a single\(dg `*', `+', `?', or \fIbound\fR. -An atom followed by `*' matches a sequence of 0 or more matches of the atom. -An atom followed by `+' matches a sequence of 1 or more matches of the atom. -An atom followed by `?' matches a sequence of 0 or 1 matches of the atom. -.PP -A \fIbound\fR is `{' followed by an unsigned decimal integer, -possibly followed by `,' -possibly followed by another unsigned decimal integer, -always followed by `}'. -The integers must lie between 0 and RE_DUP_MAX (255\(dg) inclusive, -and if there are two of them, the first may not exceed the second. -An atom followed by a bound containing one integer \fIi\fR -and no comma matches -a sequence of exactly \fIi\fR matches of the atom. -An atom followed by a bound -containing one integer \fIi\fR and a comma matches -a sequence of \fIi\fR or more matches of the atom. -An atom followed by a bound -containing two integers \fIi\fR and \fIj\fR matches -a sequence of \fIi\fR through \fIj\fR (inclusive) matches of the atom. -.PP -An atom is a regular expression enclosed in `()' (matching a match for the -regular expression), -an empty set of `()' (matching the null string)\(dg, -a \fIbracket expression\fR (see below), `.' -(matching any single character), `^' (matching the null string at the -beginning of a line), `$' (matching the null string at the -end of a line), a `\e' followed by one of the characters -`^.[$()|*+?{\e' -(matching that character taken as an ordinary character), -a `\e' followed by any other character\(dg -(matching that character taken as an ordinary character, -as if the `\e' had not been present\(dg), -or a single character with no other significance (matching that character). -A `{' followed by a character other than a digit is an ordinary -character, not the beginning of a bound\(dg. -It is illegal to end an RE with `\e'. -.PP -A \fIbracket expression\fR is a list of characters enclosed in `[]'. -It normally matches any single character from the list (but see below). -If the list begins with `^', -it matches any single character -(but see below) \fInot\fR from the rest of the list. -If two characters in the list are separated by `\-', this is shorthand -for the full \fIrange\fR of characters between those two (inclusive) in the -collating sequence, -e.g. `[0-9]' in ASCII matches any decimal digit. -It is illegal\(dg for two ranges to share an -endpoint, e.g. `a-c-e'. -Ranges are very collating-sequence-dependent, -and portable programs should avoid relying on them. -.PP -To include a literal `]' in the list, make it the first character -(following a possible `^'). -To include a literal `\-', make it the first or last character, -or the second endpoint of a range. -To use a literal `\-' as the first endpoint of a range, -enclose it in `[.' and `.]' to make it a collating element (see below). -With the exception of these and some combinations using `[' (see next -paragraphs), all other special characters, including `\e', lose their -special significance within a bracket expression. -.PP -Within a bracket expression, a collating element (a character, -a multi-character sequence that collates as if it were a single character, -or a collating-sequence name for either) -enclosed in `[.' and `.]' stands for the -sequence of characters of that collating element. -The sequence is a single element of the bracket expression's list. -A bracket expression containing a multi-character collating element -can thus match more than one character, -e.g. if the collating sequence includes a `ch' collating element, -then the RE `[[.ch.]]*c' matches the first five characters -of `chchcc'. -.PP -Within a bracket expression, a collating element enclosed in `[=' and -`=]' is an equivalence class, standing for the sequences of characters -of all collating elements equivalent to that one, including itself. -(If there are no other equivalent collating elements, -the treatment is as if the enclosing delimiters were `[.' and `.]'.) -For example, if o and \o'o^' are the members of an equivalence class, -then `[[=o=]]', `[[=\o'o^'=]]', and `[o\o'o^']' are all synonymous. -An equivalence class may not\(dg be an endpoint -of a range. -.PP -Within a bracket expression, the name of a \fIcharacter class\fR enclosed -in `[:' and `:]' stands for the list of all characters belonging to that -class. -Standard character class names are: -.PP -.RS -.nf -.ta 3c 6c 9c -alnum digit punct -alpha graph space -blank lower upper -cntrl print xdigit -.fi -.RE -.PP -These stand for the character classes defined in -.BR ctype (3). -A locale may provide others. -A character class may not be used as an endpoint of a range. -.PP -There are two special cases\(dg of bracket expressions: -the bracket expressions `[[:<:]]' and `[[:>:]]' match the null string at -the beginning and end of a word respectively. -A word is defined as a sequence of -word characters -which is neither preceded nor followed by -word characters. -A word character is an -.B alnum -character (as defined by -.BR ctype (3)) -or an underscore. -This is an extension, -compatible with but not specified by POSIX 1003.2, -and should be used with -caution in software intended to be portable to other systems. -.PP -In the event that an RE could match more than one substring of a given -string, -the RE matches the one starting earliest in the string. -If the RE could match more than one substring starting at that point, -it matches the longest. -Subexpressions also match the longest possible substrings, subject to -the constraint that the whole match be as long as possible, -with subexpressions starting earlier in the RE taking priority over -ones starting later. -Note that higher-level subexpressions thus take priority over -their lower-level component subexpressions. -.PP -Match lengths are measured in characters, not collating elements. -A null string is considered longer than no match at all. -For example, -`bb*' matches the three middle characters of `abbbc', -`(wee|week)(knights|nights)' matches all ten characters of `weeknights', -when `(.*).*' is matched against `abc' the parenthesized subexpression -matches all three characters, and -when `(a*)*' is matched against `bc' both the whole RE and the parenthesized -subexpression match the null string. -.PP -If case-independent matching is specified, -the effect is much as if all case distinctions had vanished from the -alphabet. -When an alphabetic that exists in multiple cases appears as an -ordinary character outside a bracket expression, it is effectively -transformed into a bracket expression containing both cases, -e.g. `x' becomes `[xX]'. -When it appears inside a bracket expression, all case counterparts -of it are added to the bracket expression, so that (e.g.) `[x]' -becomes `[xX]' and `[^x]' becomes `[^xX]'. -.PP -No particular limit is imposed on the length of REs\(dg. -Programs intended to be portable should not employ REs longer -than 256 bytes, -as an implementation can refuse to accept such REs and remain -POSIX-compliant. -.PP -Obsolete (``basic'') regular expressions differ in several respects. -`|', `+', and `?' are ordinary characters and there is no equivalent -for their functionality. -The delimiters for bounds are `\e{' and `\e}', -with `{' and `}' by themselves ordinary characters. -The parentheses for nested subexpressions are `\e(' and `\e)', -with `(' and `)' by themselves ordinary characters. -`^' is an ordinary character except at the beginning of the -RE or\(dg the beginning of a parenthesized subexpression, -`$' is an ordinary character except at the end of the -RE or\(dg the end of a parenthesized subexpression, -and `*' is an ordinary character if it appears at the beginning of the -RE or the beginning of a parenthesized subexpression -(after a possible leading `^'). -Finally, there is one new type of atom, a \fIback reference\fR: -`\e' followed by a non-zero decimal digit \fId\fR -matches the same sequence of characters -matched by the \fId\fRth parenthesized subexpression -(numbering subexpressions by the positions of their opening parentheses, -left to right), -so that (e.g.) `\e([bc]\e)\e1' matches `bb' or `cc' but not `bc'. -.SH SEE ALSO -regex(3) -.PP -POSIX 1003.2, section 2.8 (Regular Expression Notation). -.SH BUGS -Having two kinds of REs is a botch. -.PP -The current 1003.2 spec says that `)' is an ordinary character in -the absence of an unmatched `('; -this was an unintentional result of a wording error, -and change is likely. -Avoid relying on it. -.PP -Back references are a dreadful botch, -posing major problems for efficient implementations. -They are also somewhat vaguely defined -(does -`a\e(\e(b\e)*\e2\e)*d' match `abbbd'?). -Avoid using them. -.PP -1003.2's specification of case-independent matching is vague. -The ``one case implies all cases'' definition given above -is current consensus among implementors as to the right interpretation. -.PP -The syntax for word boundaries is incredibly ugly. Index: trunk/minix/lib/regex/regcomp.c =================================================================== --- trunk/minix/lib/regex/regcomp.c (revision 9) +++ (revision ) @@ -1,1706 +1,0 @@ -/*- - * Copyright (c) 1992, 1993, 1994 Henry Spencer. - * Copyright (c) 1992, 1993, 1994 - * The Regents of the University of California. All rights reserved. - * - * This code is derived from software contributed to Berkeley by - * Henry Spencer. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. All advertising materials mentioning features or use of this software - * must display the following acknowledgement: - * This product includes software developed by the University of - * California, Berkeley and its contributors. - * 4. Neither the name of the University nor the names of its contributors - * may be used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - * - * @(#)regcomp.c 8.5 (Berkeley) 3/20/94 - */ - -#if defined(LIBC_SCCS) && !defined(lint) -static char sccsid[] = "@(#)regcomp.c 8.5 (Berkeley) 3/20/94"; -#endif /* LIBC_SCCS and not lint */ - -#include -#include -#include -#ifdef __minix_vmd -#include -#else -#include -#endif -#include -#include -#include - -#include "utils.h" -#include "regex2.h" - -#include "cclass.h" -#include "cname.h" - -/* - * parse structure, passed up and down to avoid global variables and - * other clumsinesses - */ -struct parse { - char *next; /* next character in RE */ - char *end; /* end of string (-> NUL normally) */ - int error; /* has an error been seen? */ - sop *strip; /* malloced strip */ - sopno ssize; /* malloced strip size (allocated) */ - sopno slen; /* malloced strip length (used) */ - int ncsalloc; /* number of csets allocated */ - struct re_guts *g; -# define NPAREN 10 /* we need to remember () 1-9 for back refs */ - sopno pbegin[NPAREN]; /* -> ( ([0] unused) */ - sopno pend[NPAREN]; /* -> ) ([0] unused) */ -}; - -/* ========= begin header generated by ./mkh ========= */ -#ifdef __cplusplus -extern "C" { -#endif - -/* === regcomp.c === */ -static void p_ere(struct parse *p, int stop); -static void p_ere_exp(struct parse *p); -static void p_str(struct parse *p); -static void p_bre(struct parse *p, int end1, int end2); -static int p_simp_re(struct parse *p, int starordinary); -static int p_count(struct parse *p); -static void p_bracket(struct parse *p); -static void p_b_term(struct parse *p, cset *cs); -static void p_b_cclass(struct parse *p, cset *cs); -static void p_b_eclass(struct parse *p, cset *cs); -static char p_b_symbol(struct parse *p); -static char p_b_coll_elem(struct parse *p, int endc); -static char othercase(int ch); -static void bothcases(struct parse *p, int ch); -static void ordinary(struct parse *p, int ch); -static void nonnewline(struct parse *p); -static void repeat(struct parse *p, sopno start, int from, int to); -static int seterr(struct parse *p, int e); -static cset *allocset(struct parse *p); -static void freeset(struct parse *p, cset *cs); -static int freezeset(struct parse *p, cset *cs); -static int firstch(struct parse *p, cset *cs); -static int nch(struct parse *p, cset *cs); -static void mcadd(struct parse *p, cset *cs, char *cp); -static void mcsub(cset *cs, char *cp); -static int mcin(cset *cs, char *cp); -static char *mcfind(cset *cs, char *cp); -static void mcinvert(struct parse *p, cset *cs); -static void mccase(struct parse *p, cset *cs); -static int isinsets(struct re_guts *g, int c); -static int samesets(struct re_guts *g, int c1, int c2); -static void categorize(struct parse *p, struct re_guts *g); -static sopno dupl(struct parse *p, sopno start, sopno finish); -static void doemit(struct parse *p, sop op, size_t opnd); -static void doinsert(struct parse *p, sop op, size_t opnd, sopno pos); -static void dofwd(struct parse *p, sopno pos, sop value); -static void enlarge(struct parse *p, sopno size); -static void stripsnug(struct parse *p, struct re_guts *g); -static void findmust(struct parse *p, struct re_guts *g); -static sopno pluscount(struct parse *p, struct re_guts *g); - -#ifdef __cplusplus -} -#endif -/* ========= end header generated by ./mkh ========= */ - -static char nuls[10]; /* place to point scanner in event of error */ - -/* - * macros for use with parse structure - * BEWARE: these know that the parse structure is named `p' !!! - */ -#define PEEK() (*p->next) -#define PEEK2() (*(p->next+1)) -#define MORE() (p->next < p->end) -#define MORE2() (p->next+1 < p->end) -#define SEE(c) (MORE() && PEEK() == (c)) -#define SEETWO(a, b) (MORE() && MORE2() && PEEK() == (a) && PEEK2() == (b)) -#define EAT(c) ((SEE(c)) ? (NEXT(), 1) : 0) -#define EATTWO(a, b) ((SEETWO(a, b)) ? (NEXT2(), 1) : 0) -#define NEXT() (p->next++) -#define NEXT2() (p->next += 2) -#define NEXTn(n) (p->next += (n)) -#define GETNEXT() (*p->next++) -#define SETERROR(e) seterr(p, (e)) -#define REQUIRE(co, e) ((co) || SETERROR(e)) -#define MUSTSEE(c, e) (REQUIRE(MORE() && PEEK() == (c), e)) -#define MUSTEAT(c, e) (REQUIRE(MORE() && GETNEXT() == (c), e)) -#define MUSTNOTSEE(c, e) (REQUIRE(!MORE() || PEEK() != (c), e)) -#define EMIT(op, sopnd) doemit(p, (sop)(op), (size_t)(sopnd)) -#define INSERT(op, pos) doinsert(p, (sop)(op), HERE()-(pos)+1, pos) -#define AHEAD(pos) dofwd(p, pos, HERE()-(pos)) -#define ASTERN(sop, pos) EMIT(sop, HERE()-pos) -#define HERE() (p->slen) -#define THERE() (p->slen - 1) -#define THERETHERE() (p->slen - 2) -#define DROP(n) (p->slen -= (n)) - -#ifndef NDEBUG -static int never = 0; /* for use in asserts; shuts lint up */ -#else -#define never 0 /* some s have bugs too */ -#endif - -/* - - regcomp - interface for parser and compilation - = extern int regcomp(regex_t *, const char *, int); - = #define REG_BASIC 0000 - = #define REG_EXTENDED 0001 - = #define REG_ICASE 0002 - = #define REG_NOSUB 0004 - = #define REG_NEWLINE 0010 - = #define REG_NOSPEC 0020 - = #define REG_PEND 0040 - = #define REG_DUMP 0200 - */ -int /* 0 success, otherwise REG_something */ -regcomp(preg, pattern, cflags) -regex_t *preg; -const char *pattern; -int cflags; -{ - struct parse pa; - register struct re_guts *g; - register struct parse *p = &pa; - register int i; - register size_t len; -#ifdef REDEBUG -# define GOODFLAGS(f) (f) -#else -# define GOODFLAGS(f) ((f)&~REG_DUMP) -#endif - - cflags = GOODFLAGS(cflags); - if ((cflags®_EXTENDED) && (cflags®_NOSPEC)) - return(REG_INVARG); - - if (cflags®_PEND) { - if (preg->re_endp < pattern) - return(REG_INVARG); - len = preg->re_endp - pattern; - } else - len = strlen((char *)pattern); - - /* do the mallocs early so failure handling is easy */ - g = (struct re_guts *)malloc(sizeof(struct re_guts) + - (NC-1)*sizeof(cat_t)); - if (g == NULL) - return(REG_ESPACE); - p->ssize = len/(size_t)2*(size_t)3 + (size_t)1; /* ugh */ - p->strip = (sop *)malloc(p->ssize * sizeof(sop)); - p->slen = 0; - if (p->strip == NULL) { - free((char *)g); - return(REG_ESPACE); - } - - /* set things up */ - p->g = g; - p->next = (char *)pattern; /* convenience; we do not modify it */ - p->end = p->next + len; - p->error = 0; - p->ncsalloc = 0; - for (i = 0; i < NPAREN; i++) { - p->pbegin[i] = 0; - p->pend[i] = 0; - } - g->csetsize = NC; - g->sets = NULL; - g->setbits = NULL; - g->ncsets = 0; - g->cflags = cflags; - g->iflags = 0; - g->nbol = 0; - g->neol = 0; - g->must = NULL; - g->mlen = 0; - g->nsub = 0; - g->ncategories = 1; /* category 0 is "everything else" */ - g->categories = &g->catspace[-(CHAR_MIN)]; - (void) memset((char *)g->catspace, 0, NC*sizeof(cat_t)); - g->backrefs = 0; - - /* do it */ - EMIT(OEND, 0); - g->firststate = THERE(); - if (cflags®_EXTENDED) - p_ere(p, OUT); - else if (cflags®_NOSPEC) - p_str(p); - else - p_bre(p, OUT, OUT); - EMIT(OEND, 0); - g->laststate = THERE(); - - /* tidy up loose ends and fill things in */ - categorize(p, g); - stripsnug(p, g); - findmust(p, g); - g->nplus = pluscount(p, g); - g->magic = MAGIC2; - preg->re_nsub = g->nsub; - preg->re_g = g; - preg->re_magic = MAGIC1; -#ifndef REDEBUG - /* not debugging, so can't rely on the assert() in regexec() */ - if (g->iflags&BAD) - SETERROR(REG_ASSERT); -#endif - - /* win or lose, we're done */ - if (p->error != 0) /* lose */ - regfree(preg); - return(p->error); -} - -/* - - p_ere - ERE parser top level, concatenation and alternation - == static void p_ere(register struct parse *p, int stop); - */ -static void -p_ere(p, stop) -register struct parse *p; -int stop; /* character this ERE should end at */ -{ - register char c; - register sopno prevback; - register sopno prevfwd; - register sopno conc; - register int first = 1; /* is this the first alternative? */ - - for (;;) { - /* do a bunch of concatenated expressions */ - conc = HERE(); - while (MORE() && (c = PEEK()) != '|' && c != stop) - p_ere_exp(p); - REQUIRE(HERE() != conc, REG_EMPTY); /* require nonempty */ - - if (!EAT('|')) - break; /* NOTE BREAK OUT */ - - if (first) { - INSERT(OCH_, conc); /* offset is wrong */ - prevfwd = conc; - prevback = conc; - first = 0; - } - ASTERN(OOR1, prevback); - prevback = THERE(); - AHEAD(prevfwd); /* fix previous offset */ - prevfwd = HERE(); - EMIT(OOR2, 0); /* offset is very wrong */ - } - - if (!first) { /* tail-end fixups */ - AHEAD(prevfwd); - ASTERN(O_CH, prevback); - } - - assert(!MORE() || SEE(stop)); -} - -/* - - p_ere_exp - parse one subERE, an atom possibly followed by a repetition op - == static void p_ere_exp(register struct parse *p); - */ -static void -p_ere_exp(p) -register struct parse *p; -{ - register char c; - register sopno pos; - register int count; - register int count2; - register sopno subno; - int wascaret = 0; - - assert(MORE()); /* caller should have ensured this */ - c = GETNEXT(); - - pos = HERE(); - switch (c) { - case '(': - REQUIRE(MORE(), REG_EPAREN); - p->g->nsub++; - subno = p->g->nsub; - if (subno < NPAREN) - p->pbegin[subno] = HERE(); - EMIT(OLPAREN, subno); - if (!SEE(')')) - p_ere(p, ')'); - if (subno < NPAREN) { - p->pend[subno] = HERE(); - assert(p->pend[subno] != 0); - } - EMIT(ORPAREN, subno); - MUSTEAT(')', REG_EPAREN); - break; -#ifndef POSIX_MISTAKE - case ')': /* happens only if no current unmatched ( */ - /* - * You may ask, why the ifndef? Because I didn't notice - * this until slightly too late for 1003.2, and none of the - * other 1003.2 regular-expression reviewers noticed it at - * all. So an unmatched ) is legal POSIX, at least until - * we can get it fixed. - */ - SETERROR(REG_EPAREN); - break; -#endif - case '^': - EMIT(OBOL, 0); - p->g->iflags |= USEBOL; - p->g->nbol++; - wascaret = 1; - break; - case '$': - EMIT(OEOL, 0); - p->g->iflags |= USEEOL; - p->g->neol++; - break; - case '|': - SETERROR(REG_EMPTY); - break; - case '*': - case '+': - case '?': - SETERROR(REG_BADRPT); - break; - case '.': - if (p->g->cflags®_NEWLINE) - nonnewline(p); - else - EMIT(OANY, 0); - break; - case '[': - p_bracket(p); - break; - case '\\': - REQUIRE(MORE(), REG_EESCAPE); - c = GETNEXT(); - ordinary(p, c); - break; - case '{': /* okay as ordinary except if digit follows */ - REQUIRE(!MORE() || !isdigit(PEEK()), REG_BADRPT); - /* FALLTHROUGH */ - default: - ordinary(p, c); - break; - } - - if (!MORE()) - return; - c = PEEK(); - /* we call { a repetition if followed by a digit */ - if (!( c == '*' || c == '+' || c == '?' || - (c == '{' && MORE2() && isdigit(PEEK2())) )) - return; /* no repetition, we're done */ - NEXT(); - - REQUIRE(!wascaret, REG_BADRPT); - switch (c) { - case '*': /* implemented as +? */ - /* this case does not require the (y|) trick, noKLUDGE */ - INSERT(OPLUS_, pos); - ASTERN(O_PLUS, pos); - INSERT(OQUEST_, pos); - ASTERN(O_QUEST, pos); - break; - case '+': - INSERT(OPLUS_, pos); - ASTERN(O_PLUS, pos); - break; - case '?': - /* KLUDGE: emit y? as (y|) until subtle bug gets fixed */ - INSERT(OCH_, pos); /* offset slightly wrong */ - ASTERN(OOR1, pos); /* this one's right */ - AHEAD(pos); /* fix the OCH_ */ - EMIT(OOR2, 0); /* offset very wrong... */ - AHEAD(THERE()); /* ...so fix it */ - ASTERN(O_CH, THERETHERE()); - break; - case '{': - count = p_count(p); - if (EAT(',')) { - if (isdigit(PEEK())) { - count2 = p_count(p); - REQUIRE(count <= count2, REG_BADBR); - } else /* single number with comma */ - count2 = INFINITY; - } else /* just a single number */ - count2 = count; - repeat(p, pos, count, count2); - if (!EAT('}')) { /* error heuristics */ - while (MORE() && PEEK() != '}') - NEXT(); - REQUIRE(MORE(), REG_EBRACE); - SETERROR(REG_BADBR); - } - break; - } - - if (!MORE()) - return; - c = PEEK(); - if (!( c == '*' || c == '+' || c == '?' || - (c == '{' && MORE2() && isdigit(PEEK2())) ) ) - return; - SETERROR(REG_BADRPT); -} - -/* - - p_str - string (no metacharacters) "parser" - == static void p_str(register struct parse *p); - */ -static void -p_str(p) -register struct parse *p; -{ - REQUIRE(MORE(), REG_EMPTY); - while (MORE()) - ordinary(p, GETNEXT()); -} - -/* - - p_bre - BRE parser top level, anchoring and concatenation - == static void p_bre(register struct parse *p, register int end1, \ - == register int end2); - * Giving end1 as OUT essentially eliminates the end1/end2 check. - * - * This implementation is a bit of a kludge, in that a trailing $ is first - * taken as an ordinary character and then revised to be an anchor. The - * only undesirable side effect is that '$' gets included as a character - * category in such cases. This is fairly harmless; not worth fixing. - * The amount of lookahead needed to avoid this kludge is excessive. - */ -static void -p_bre(p, end1, end2) -register struct parse *p; -register int end1; /* first terminating character */ -register int end2; /* second terminating character */ -{ - register sopno start = HERE(); - register int first = 1; /* first subexpression? */ - register int wasdollar = 0; - - if (EAT('^')) { - EMIT(OBOL, 0); - p->g->iflags |= USEBOL; - p->g->nbol++; - } - while (MORE() && !SEETWO(end1, end2)) { - wasdollar = p_simp_re(p, first); - first = 0; - } - if (wasdollar) { /* oops, that was a trailing anchor */ - DROP(1); - EMIT(OEOL, 0); - p->g->iflags |= USEEOL; - p->g->neol++; - } - - REQUIRE(HERE() != start, REG_EMPTY); /* require nonempty */ -} - -/* - - p_simp_re - parse a simple RE, an atom possibly followed by a repetition - == static int p_simp_re(register struct parse *p, int starordinary); - */ -static int /* was the simple RE an unbackslashed $? */ -p_simp_re(p, starordinary) -register struct parse *p; -int starordinary; /* is a leading * an ordinary character? */ -{ - register int c; - register int count; - register int count2; - register sopno pos; - register int i; - register sopno subno; -# define BACKSL (1<g->cflags®_NEWLINE) - nonnewline(p); - else - EMIT(OANY, 0); - break; - case '[': - p_bracket(p); - break; - case BACKSL|'{': - SETERROR(REG_BADRPT); - break; - case BACKSL|'(': - p->g->nsub++; - subno = p->g->nsub; - if (subno < NPAREN) - p->pbegin[subno] = HERE(); - EMIT(OLPAREN, subno); - /* the MORE here is an error heuristic */ - if (MORE() && !SEETWO('\\', ')')) - p_bre(p, '\\', ')'); - if (subno < NPAREN) { - p->pend[subno] = HERE(); - assert(p->pend[subno] != 0); - } - EMIT(ORPAREN, subno); - REQUIRE(EATTWO('\\', ')'), REG_EPAREN); - break; - case BACKSL|')': /* should not get here -- must be user */ - case BACKSL|'}': - SETERROR(REG_EPAREN); - break; - case BACKSL|'1': - case BACKSL|'2': - case BACKSL|'3': - case BACKSL|'4': - case BACKSL|'5': - case BACKSL|'6': - case BACKSL|'7': - case BACKSL|'8': - case BACKSL|'9': - i = (c&~BACKSL) - '0'; - assert(i < NPAREN); - if (p->pend[i] != 0) { - assert(i <= p->g->nsub); - EMIT(OBACK_, i); - assert(p->pbegin[i] != 0); - assert(OP(p->strip[p->pbegin[i]]) == OLPAREN); - assert(OP(p->strip[p->pend[i]]) == ORPAREN); - (void) dupl(p, p->pbegin[i]+1, p->pend[i]); - EMIT(O_BACK, i); - } else - SETERROR(REG_ESUBREG); - p->g->backrefs = 1; - break; - case '*': - REQUIRE(starordinary, REG_BADRPT); - /* FALLTHROUGH */ - default: - ordinary(p, c &~ BACKSL); - break; - } - - if (EAT('*')) { /* implemented as +? */ - /* this case does not require the (y|) trick, noKLUDGE */ - INSERT(OPLUS_, pos); - ASTERN(O_PLUS, pos); - INSERT(OQUEST_, pos); - ASTERN(O_QUEST, pos); - } else if (EATTWO('\\', '{')) { - count = p_count(p); - if (EAT(',')) { - if (MORE() && isdigit(PEEK())) { - count2 = p_count(p); - REQUIRE(count <= count2, REG_BADBR); - } else /* single number with comma */ - count2 = INFINITY; - } else /* just a single number */ - count2 = count; - repeat(p, pos, count, count2); - if (!EATTWO('\\', '}')) { /* error heuristics */ - while (MORE() && !SEETWO('\\', '}')) - NEXT(); - REQUIRE(MORE(), REG_EBRACE); - SETERROR(REG_BADBR); - } - } else if (c == (unsigned char)'$') /* $ (but not \$) ends it */ - return(1); - - return(0); -} - -/* - - p_count - parse a repetition count - == static int p_count(register struct parse *p); - */ -static int /* the value */ -p_count(p) -register struct parse *p; -{ - register int count = 0; - register int ndigits = 0; - - while (MORE() && isdigit(PEEK()) && count <= DUPMAX) { - count = count*10 + (GETNEXT() - '0'); - ndigits++; - } - - REQUIRE(ndigits > 0 && count <= DUPMAX, REG_BADBR); - return(count); -} - -/* - - p_bracket - parse a bracketed character list - == static void p_bracket(register struct parse *p); - * - * Note a significant property of this code: if the allocset() did SETERROR, - * no set operations are done. - */ -static void -p_bracket(p) -register struct parse *p; -{ - register char c; - register cset *cs = allocset(p); - register int invert = 0; - - /* Dept of Truly Sickening Special-Case Kludges */ - if (p->next + 5 < p->end && strncmp(p->next, "[:<:]]", 6) == 0) { - EMIT(OBOW, 0); - NEXTn(6); - return; - } - if (p->next + 5 < p->end && strncmp(p->next, "[:>:]]", 6) == 0) { - EMIT(OEOW, 0); - NEXTn(6); - return; - } - - if (EAT('^')) - invert++; /* make note to invert set at end */ - if (EAT(']')) - CHadd(cs, ']'); - else if (EAT('-')) - CHadd(cs, '-'); - while (MORE() && PEEK() != ']' && !SEETWO('-', ']')) - p_b_term(p, cs); - if (EAT('-')) - CHadd(cs, '-'); - MUSTEAT(']', REG_EBRACK); - - if (p->error != 0) /* don't mess things up further */ - return; - - if (p->g->cflags®_ICASE) { - register int i; - register int ci; - - for (i = p->g->csetsize - 1; i >= 0; i--) - if (CHIN(cs, i) && isalpha(i)) { - ci = othercase(i); - if (ci != i) - CHadd(cs, ci); - } - if (cs->multis != NULL) - mccase(p, cs); - } - if (invert) { - register int i; - - for (i = p->g->csetsize - 1; i >= 0; i--) - if (CHIN(cs, i)) - CHsub(cs, i); - else - CHadd(cs, i); - if (p->g->cflags®_NEWLINE) - CHsub(cs, '\n'); - if (cs->multis != NULL) - mcinvert(p, cs); - } - - assert(cs->multis == NULL); /* xxx */ - - if (nch(p, cs) == 1) { /* optimize singleton sets */ - ordinary(p, firstch(p, cs)); - freeset(p, cs); - } else - EMIT(OANYOF, freezeset(p, cs)); -} - -/* - - p_b_term - parse one term of a bracketed character list - == static void p_b_term(register struct parse *p, register cset *cs); - */ -static void -p_b_term(p, cs) -register struct parse *p; -register cset *cs; -{ - register char c; - register char start, finish; - register int i; - - /* classify what we've got */ - switch ((MORE()) ? PEEK() : '\0') { - case '[': - c = (MORE2()) ? PEEK2() : '\0'; - break; - case '-': - SETERROR(REG_ERANGE); - return; /* NOTE RETURN */ - break; - default: - c = '\0'; - break; - } - - switch (c) { - case ':': /* character class */ - NEXT2(); - REQUIRE(MORE(), REG_EBRACK); - c = PEEK(); - REQUIRE(c != '-' && c != ']', REG_ECTYPE); - p_b_cclass(p, cs); - REQUIRE(MORE(), REG_EBRACK); - REQUIRE(EATTWO(':', ']'), REG_ECTYPE); - break; - case '=': /* equivalence class */ - NEXT2(); - REQUIRE(MORE(), REG_EBRACK); - c = PEEK(); - REQUIRE(c != '-' && c != ']', REG_ECOLLATE); - p_b_eclass(p, cs); - REQUIRE(MORE(), REG_EBRACK); - REQUIRE(EATTWO('=', ']'), REG_ECOLLATE); - break; - default: /* symbol, ordinary character, or range */ -/* xxx revision needed for multichar stuff */ - start = p_b_symbol(p); - if (SEE('-') && MORE2() && PEEK2() != ']') { - /* range */ - NEXT(); - if (EAT('-')) - finish = '-'; - else - finish = p_b_symbol(p); - } else - finish = start; -/* xxx what about signed chars here... */ - REQUIRE(start <= finish, REG_ERANGE); - for (i = start; i <= finish; i++) - CHadd(cs, i); - break; - } -} - -/* - - p_b_cclass - parse a character-class name and deal with it - == static void p_b_cclass(register struct parse *p, register cset *cs); - */ -static void -p_b_cclass(p, cs) -register struct parse *p; -register cset *cs; -{ - register char *sp = p->next; - register struct cclass *cp; - register size_t len; - register char *u; - register char c; - - while (MORE() && isalpha(PEEK())) - NEXT(); - len = p->next - sp; - for (cp = cclasses; cp->name != NULL; cp++) - if (strncmp(cp->name, sp, len) == 0 && cp->name[len] == '\0') - break; - if (cp->name == NULL) { - /* oops, didn't find it */ - SETERROR(REG_ECTYPE); - return; - } - - u = cp->chars; - while ((c = *u++) != '\0') - CHadd(cs, c); - for (u = cp->multis; *u != '\0'; u += strlen(u) + 1) - MCadd(p, cs, u); -} - -/* - - p_b_eclass - parse an equivalence-class name and deal with it - == static void p_b_eclass(register struct parse *p, register cset *cs); - * - * This implementation is incomplete. xxx - */ -static void -p_b_eclass(p, cs) -register struct parse *p; -register cset *cs; -{ - register char c; - - c = p_b_coll_elem(p, '='); - CHadd(cs, c); -} - -/* - - p_b_symbol - parse a character or [..]ed multicharacter collating symbol - == static char p_b_symbol(register struct parse *p); - */ -static char /* value of symbol */ -p_b_symbol(p) -register struct parse *p; -{ - register char value; - - REQUIRE(MORE(), REG_EBRACK); - if (!EATTWO('[', '.')) - return(GETNEXT()); - - /* collating symbol */ - value = p_b_coll_elem(p, '.'); - REQUIRE(EATTWO('.', ']'), REG_ECOLLATE); - return(value); -} - -/* - - p_b_coll_elem - parse a collating-element name and look it up - == static char p_b_coll_elem(register struct parse *p, int endc); - */ -static char /* value of collating element */ -p_b_coll_elem(p, endc) -register struct parse *p; -int endc; /* name ended by endc,']' */ -{ - register char *sp = p->next; - register struct cname *cp; - register int len; - register char c; - - while (MORE() && !SEETWO(endc, ']')) - NEXT(); - if (!MORE()) { - SETERROR(REG_EBRACK); - return(0); - } - len = p->next - sp; - for (cp = cnames; cp->name != NULL; cp++) - if (strncmp(cp->name, sp, len) == 0 && cp->name[len] == '\0') - return(cp->code); /* known name */ - if (len == 1) - return(*sp); /* single character */ - SETERROR(REG_ECOLLATE); /* neither */ - return(0); -} - -/* - - othercase - return the case counterpart of an alphabetic - == static char othercase(int ch); - */ -static char /* if no counterpart, return ch */ -othercase(ch) -int ch; -{ - assert(isalpha(ch)); - if (isupper(ch)) - return(tolower(ch)); - else if (islower(ch)) - return(toupper(ch)); - else /* peculiar, but could happen */ - return(ch); -} - -/* - - bothcases - emit a dualcase version of a two-case character - == static void bothcases(register struct parse *p, int ch); - * - * Boy, is this implementation ever a kludge... - */ -static void -bothcases(p, ch) -register struct parse *p; -int ch; -{ - register char *oldnext = p->next; - register char *oldend = p->end; - char bracket[3]; - - assert(othercase(ch) != ch); /* p_bracket() would recurse */ - p->next = bracket; - p->end = bracket+2; - bracket[0] = ch; - bracket[1] = ']'; - bracket[2] = '\0'; - p_bracket(p); - assert(p->next == bracket+2); - p->next = oldnext; - p->end = oldend; -} - -/* - - ordinary - emit an ordinary character - == static void ordinary(register struct parse *p, register int ch); - */ -static void -ordinary(p, ch) -register struct parse *p; -register int ch; -{ - register cat_t *cap = p->g->categories; - - if ((p->g->cflags®_ICASE) && isalpha(ch) && othercase(ch) != ch) - bothcases(p, ch); - else { - EMIT(OCHAR, (unsigned char)ch); - if (cap[ch] == 0) - cap[ch] = p->g->ncategories++; - } -} - -/* - - nonnewline - emit REG_NEWLINE version of OANY - == static void nonnewline(register struct parse *p); - * - * Boy, is this implementation ever a kludge... - */ -static void -nonnewline(p) -register struct parse *p; -{ - register char *oldnext = p->next; - register char *oldend = p->end; - char bracket[4]; - - p->next = bracket; - p->end = bracket+3; - bracket[0] = '^'; - bracket[1] = '\n'; - bracket[2] = ']'; - bracket[3] = '\0'; - p_bracket(p); - assert(p->next == bracket+3); - p->next = oldnext; - p->end = oldend; -} - -/* - - repeat - generate code for a bounded repetition, recursively if needed - == static void repeat(register struct parse *p, sopno start, int from, int to); - */ -static void -repeat(p, start, from, to) -register struct parse *p; -sopno start; /* operand from here to end of strip */ -int from; /* repeated from this number */ -int to; /* to this number of times (maybe INFINITY) */ -{ - register sopno finish = HERE(); -# define N 2 -# define INF 3 -# define REP(f, t) ((f)*8 + (t)) -# define MAP(n) (((n) <= 1) ? (n) : ((n) == INFINITY) ? INF : N) - register sopno copy; - - if (p->error != 0) /* head off possible runaway recursion */ - return; - - assert(from <= to); - - switch (REP(MAP(from), MAP(to))) { - case REP(0, 0): /* must be user doing this */ - DROP(finish-start); /* drop the operand */ - break; - case REP(0, 1): /* as x{1,1}? */ - case REP(0, N): /* as x{1,n}? */ - case REP(0, INF): /* as x{1,}? */ - /* KLUDGE: emit y? as (y|) until subtle bug gets fixed */ - INSERT(OCH_, start); /* offset is wrong... */ - repeat(p, start+1, 1, to); - ASTERN(OOR1, start); - AHEAD(start); /* ... fix it */ - EMIT(OOR2, 0); - AHEAD(THERE()); - ASTERN(O_CH, THERETHERE()); - break; - case REP(1, 1): /* trivial case */ - /* done */ - break; - case REP(1, N): /* as x?x{1,n-1} */ - /* KLUDGE: emit y? as (y|) until subtle bug gets fixed */ - INSERT(OCH_, start); - ASTERN(OOR1, start); - AHEAD(start); - EMIT(OOR2, 0); /* offset very wrong... */ - AHEAD(THERE()); /* ...so fix it */ - ASTERN(O_CH, THERETHERE()); - copy = dupl(p, start+1, finish+1); - assert(copy == finish+4); - repeat(p, copy, 1, to-1); - break; - case REP(1, INF): /* as x+ */ - INSERT(OPLUS_, start); - ASTERN(O_PLUS, start); - break; - case REP(N, N): /* as xx{m-1,n-1} */ - copy = dupl(p, start, finish); - repeat(p, copy, from-1, to-1); - break; - case REP(N, INF): /* as xx{n-1,INF} */ - copy = dupl(p, start, finish); - repeat(p, copy, from-1, to); - break; - default: /* "can't happen" */ - SETERROR(REG_ASSERT); /* just in case */ - break; - } -} - -/* - - seterr - set an error condition - == static int seterr(register struct parse *p, int e); - */ -static int /* useless but makes type checking happy */ -seterr(p, e) -register struct parse *p; -int e; -{ - if (p->error == 0) /* keep earliest error condition */ - p->error = e; - p->next = nuls; /* try to bring things to a halt */ - p->end = nuls; - return(0); /* make the return value well-defined */ -} - -/* - - allocset - allocate a set of characters for [] - == static cset *allocset(register struct parse *p); - */ -static cset * -allocset(p) -register struct parse *p; -{ - register int no = p->g->ncsets++; - register size_t nc; - register size_t nbytes; - register cset *cs; - register size_t css = (size_t)p->g->csetsize; - register int i; - - if (no >= p->ncsalloc) { /* need another column of space */ - p->ncsalloc += CHAR_BIT; - nc = p->ncsalloc; - assert(nc % CHAR_BIT == 0); - nbytes = nc / CHAR_BIT * css; - if (p->g->sets == NULL) - p->g->sets = (cset *)malloc(nc * sizeof(cset)); - else - p->g->sets = (cset *)realloc((char *)p->g->sets, - nc * sizeof(cset)); - if (p->g->setbits == NULL) - p->g->setbits = (uch *)malloc(nbytes); - else { - p->g->setbits = (uch *)realloc((char *)p->g->setbits, - nbytes); - /* xxx this isn't right if setbits is now NULL */ - for (i = 0; i < no; i++) - p->g->sets[i].ptr = p->g->setbits + css*(i/CHAR_BIT); - } - if (p->g->sets != NULL && p->g->setbits != NULL) - (void) memset((char *)p->g->setbits + (nbytes - css), - 0, css); - else { - no = 0; - SETERROR(REG_ESPACE); - /* caller's responsibility not to do set ops */ - } - } - - assert(p->g->sets != NULL); /* xxx */ - cs = &p->g->sets[no]; - cs->ptr = p->g->setbits + css*((no)/CHAR_BIT); - cs->mask = 1 << ((no) % CHAR_BIT); - cs->hash = 0; - cs->smultis = 0; - cs->multis = NULL; - - return(cs); -} - -/* - - freeset - free a now-unused set - == static void freeset(register struct parse *p, register cset *cs); - */ -static void -freeset(p, cs) -register struct parse *p; -register cset *cs; -{ - register int i; - register cset *top = &p->g->sets[p->g->ncsets]; - register size_t css = (size_t)p->g->csetsize; - - for (i = 0; i < css; i++) - CHsub(cs, i); - if (cs == top-1) /* recover only the easy case */ - p->g->ncsets--; -} - -/* - - freezeset - final processing on a set of characters - == static int freezeset(register struct parse *p, register cset *cs); - * - * The main task here is merging identical sets. This is usually a waste - * of time (although the hash code minimizes the overhead), but can win - * big if REG_ICASE is being used. REG_ICASE, by the way, is why the hash - * is done using addition rather than xor -- all ASCII [aA] sets xor to - * the same value! - */ -static int /* set number */ -freezeset(p, cs) -register struct parse *p; -register cset *cs; -{ - register uch h = cs->hash; - register int i; - register cset *top = &p->g->sets[p->g->ncsets]; - register cset *cs2; - register size_t css = (size_t)p->g->csetsize; - - /* look for an earlier one which is the same */ - for (cs2 = &p->g->sets[0]; cs2 < top; cs2++) - if (cs2->hash == h && cs2 != cs) { - /* maybe */ - for (i = 0; i < css; i++) - if (!!CHIN(cs2, i) != !!CHIN(cs, i)) - break; /* no */ - if (i == css) - break; /* yes */ - } - - if (cs2 < top) { /* found one */ - freeset(p, cs); - cs = cs2; - } - - return((int)(cs - p->g->sets)); -} - -/* - - firstch - return first character in a set (which must have at least one) - == static int firstch(register struct parse *p, register cset *cs); - */ -static int /* character; there is no "none" value */ -firstch(p, cs) -register struct parse *p; -register cset *cs; -{ - register int i; - register size_t css = (size_t)p->g->csetsize; - - for (i = 0; i < css; i++) - if (CHIN(cs, i)) - return((char)i); - assert(never); - return(0); /* arbitrary */ -} - -/* - - nch - number of characters in a set - == static int nch(register struct parse *p, register cset *cs); - */ -static int -nch(p, cs) -register struct parse *p; -register cset *cs; -{ - register int i; - register size_t css = (size_t)p->g->csetsize; - register int n = 0; - - for (i = 0; i < css; i++) - if (CHIN(cs, i)) - n++; - return(n); -} - -/* - - mcadd - add a collating element to a cset - == static void mcadd(register struct parse *p, register cset *cs, \ - == register char *cp); - */ -static void -mcadd(p, cs, cp) -register struct parse *p; -register cset *cs; -register char *cp; -{ - register size_t oldend = cs->smultis; - - cs->smultis += strlen(cp) + 1; - if (cs->multis == NULL) - cs->multis = malloc(cs->smultis); - else - cs->multis = realloc(cs->multis, cs->smultis); - if (cs->multis == NULL) { - SETERROR(REG_ESPACE); - return; - } - - (void) strcpy(cs->multis + oldend - 1, cp); - cs->multis[cs->smultis - 1] = '\0'; -} - -/* - - mcsub - subtract a collating element from a cset - == static void mcsub(register cset *cs, register char *cp); - */ -static void -mcsub(cs, cp) -register cset *cs; -register char *cp; -{ - register char *fp = mcfind(cs, cp); - register size_t len = strlen(fp); - - assert(fp != NULL); - (void) memmove(fp, fp + len + 1, - cs->smultis - (fp + len + 1 - cs->multis)); - cs->smultis -= len; - - if (cs->smultis == 0) { - free(cs->multis); - cs->multis = NULL; - return; - } - - cs->multis = realloc(cs->multis, cs->smultis); - assert(cs->multis != NULL); -} - -/* - - mcin - is a collating element in a cset? - == static int mcin(register cset *cs, register char *cp); - */ -static int -mcin(cs, cp) -register cset *cs; -register char *cp; -{ - return(mcfind(cs, cp) != NULL); -} - -/* - - mcfind - find a collating element in a cset - == static char *mcfind(register cset *cs, register char *cp); - */ -static char * -mcfind(cs, cp) -register cset *cs; -register char *cp; -{ - register char *p; - - if (cs->multis == NULL) - return(NULL); - for (p = cs->multis; *p != '\0'; p += strlen(p) + 1) - if (strcmp(cp, p) == 0) - return(p); - return(NULL); -} - -/* - - mcinvert - invert the list of collating elements in a cset - == static void mcinvert(register struct parse *p, register cset *cs); - * - * This would have to know the set of possibilities. Implementation - * is deferred. - */ -static void -mcinvert(p, cs) -register struct parse *p; -register cset *cs; -{ - assert(cs->multis == NULL); /* xxx */ -} - -/* - - mccase - add case counterparts of the list of collating elements in a cset - == static void mccase(register struct parse *p, register cset *cs); - * - * This would have to know the set of possibilities. Implementation - * is deferred. - */ -static void -mccase(p, cs) -register struct parse *p; -register cset *cs; -{ - assert(cs->multis == NULL); /* xxx */ -} - -/* - - isinsets - is this character in any sets? - == static int isinsets(register struct re_guts *g, int c); - */ -static int /* predicate */ -isinsets(g, c) -register struct re_guts *g; -int c; -{ - register uch *col; - register int i; - register int ncols = (g->ncsets+(CHAR_BIT-1)) / CHAR_BIT; - register unsigned uc = (unsigned char)c; - - for (i = 0, col = g->setbits; i < ncols; i++, col += g->csetsize) - if (col[uc] != 0) - return(1); - return(0); -} - -/* - - samesets - are these two characters in exactly the same sets? - == static int samesets(register struct re_guts *g, int c1, int c2); - */ -static int /* predicate */ -samesets(g, c1, c2) -register struct re_guts *g; -int c1; -int c2; -{ - register uch *col; - register int i; - register int ncols = (g->ncsets+(CHAR_BIT-1)) / CHAR_BIT; - register unsigned uc1 = (unsigned char)c1; - register unsigned uc2 = (unsigned char)c2; - - for (i = 0, col = g->setbits; i < ncols; i++, col += g->csetsize) - if (col[uc1] != col[uc2]) - return(0); - return(1); -} - -/* - - categorize - sort out character categories - == static void categorize(struct parse *p, register struct re_guts *g); - */ -static void -categorize(p, g) -struct parse *p; -register struct re_guts *g; -{ - register cat_t *cats = g->categories; - register int c; - register int c2; - register cat_t cat; - - /* avoid making error situations worse */ - if (p->error != 0) - return; - - for (c = CHAR_MIN; c <= CHAR_MAX; c++) - if (cats[c] == 0 && isinsets(g, c)) { - cat = g->ncategories++; - cats[c] = cat; - for (c2 = c+1; c2 <= CHAR_MAX; c2++) - if (cats[c2] == 0 && samesets(g, c, c2)) - cats[c2] = cat; - } -} - -/* - - dupl - emit a duplicate of a bunch of sops - == static sopno dupl(register struct parse *p, sopno start, sopno finish); - */ -static sopno /* start of duplicate */ -dupl(p, start, finish) -register struct parse *p; -sopno start; /* from here */ -sopno finish; /* to this less one */ -{ - register sopno ret = HERE(); - register sopno len = finish - start; - - assert(finish >= start); - if (len == 0) - return(ret); - enlarge(p, p->ssize + len); /* this many unexpected additions */ - assert(p->ssize >= p->slen + len); - (void) memcpy((char *)(p->strip + p->slen), - (char *)(p->strip + start), (size_t)len*sizeof(sop)); - p->slen += len; - return(ret); -} - -/* - - doemit - emit a strip operator - == static void doemit(register struct parse *p, sop op, size_t opnd); - * - * It might seem better to implement this as a macro with a function as - * hard-case backup, but it's just too big and messy unless there are - * some changes to the data structures. Maybe later. - */ -static void -doemit(p, op, opnd) -register struct parse *p; -sop op; -size_t opnd; -{ - /* avoid making error situations worse */ - if (p->error != 0) - return; - - /* deal with oversize operands ("can't happen", more or less) */ - assert(opnd < 1<slen >= p->ssize) - enlarge(p, (p->ssize+1) / 2 * 3); /* +50% */ - assert(p->slen < p->ssize); - - /* finally, it's all reduced to the easy case */ - p->strip[p->slen++] = SOP(op, opnd); -} - -/* - - doinsert - insert a sop into the strip - == static void doinsert(register struct parse *p, sop op, size_t opnd, sopno pos); - */ -static void -doinsert(p, op, opnd, pos) -register struct parse *p; -sop op; -size_t opnd; -sopno pos; -{ - register sopno sn; - register sop s; - register int i; - - /* avoid making error situations worse */ - if (p->error != 0) - return; - - sn = HERE(); - EMIT(op, opnd); /* do checks, ensure space */ - assert(HERE() == sn+1); - s = p->strip[sn]; - - /* adjust paren pointers */ - assert(pos > 0); - for (i = 1; i < NPAREN; i++) { - if (p->pbegin[i] >= pos) { - p->pbegin[i]++; - } - if (p->pend[i] >= pos) { - p->pend[i]++; - } - } - - memmove((char *)&p->strip[pos+1], (char *)&p->strip[pos], - (HERE()-pos-1)*sizeof(sop)); - p->strip[pos] = s; -} - -/* - - dofwd - complete a forward reference - == static void dofwd(register struct parse *p, sopno pos, sop value); - */ -static void -dofwd(p, pos, value) -register struct parse *p; -register sopno pos; -sop value; -{ - /* avoid making error situations worse */ - if (p->error != 0) - return; - - assert(value < 1<strip[pos] = OP(p->strip[pos]) | value; -} - -/* - - enlarge - enlarge the strip - == static void enlarge(register struct parse *p, sopno size); - */ -static void -enlarge(p, size) -register struct parse *p; -register sopno size; -{ - register sop *sp; - - if (p->ssize >= size) - return; - - sp = (sop *)realloc(p->strip, size*sizeof(sop)); - if (sp == NULL) { - SETERROR(REG_ESPACE); - return; - } - p->strip = sp; - p->ssize = size; -} - -/* - - stripsnug - compact the strip - == static void stripsnug(register struct parse *p, register struct re_guts *g); - */ -static void -stripsnug(p, g) -register struct parse *p; -register struct re_guts *g; -{ - g->nstates = p->slen; - g->strip = (sop *)realloc((char *)p->strip, p->slen * sizeof(sop)); - if (g->strip == NULL) { - SETERROR(REG_ESPACE); - g->strip = p->strip; - } -} - -/* - - findmust - fill in must and mlen with longest mandatory literal string - == static void findmust(register struct parse *p, register struct re_guts *g); - * - * This algorithm could do fancy things like analyzing the operands of | - * for common subsequences. Someday. This code is simple and finds most - * of the interesting cases. - * - * Note that must and mlen got initialized during setup. - */ -static void -findmust(p, g) -struct parse *p; -register struct re_guts *g; -{ - register sop *scan; - sop *start; - register sop *newstart; - register sopno newlen; - register sop s; - register char *cp; - register sopno i; - - /* avoid making error situations worse */ - if (p->error != 0) - return; - - /* find the longest OCHAR sequence in strip */ - newlen = 0; - scan = g->strip + 1; - do { - s = *scan++; - switch (OP(s)) { - case OCHAR: /* sequence member */ - if (newlen == 0) /* new sequence */ - newstart = scan - 1; - newlen++; - break; - case OPLUS_: /* things that don't break one */ - case OLPAREN: - case ORPAREN: - break; - case OQUEST_: /* things that must be skipped */ - case OCH_: - scan--; - do { - scan += OPND(s); - s = *scan; - /* assert() interferes w debug printouts */ - if (OP(s) != O_QUEST && OP(s) != O_CH && - OP(s) != OOR2) { - g->iflags |= BAD; - return; - } - } while (OP(s) != O_QUEST && OP(s) != O_CH); - /* fallthrough */ - default: /* things that break a sequence */ - if (newlen > g->mlen) { /* ends one */ - start = newstart; - g->mlen = newlen; - } - newlen = 0; - break; - } - } while (OP(s) != OEND); - - if (g->mlen == 0) /* there isn't one */ - return; - - /* turn it into a character string */ - g->must = malloc((size_t)g->mlen + 1); - if (g->must == NULL) { /* argh; just forget it */ - g->mlen = 0; - return; - } - cp = g->must; - scan = start; - for (i = g->mlen; i > 0; i--) { - while (OP(s = *scan++) != OCHAR) - continue; - assert(cp < g->must + g->mlen); - *cp++ = (char)OPND(s); - } - assert(cp == g->must + g->mlen); - *cp++ = '\0'; /* just on general principles */ -} - -/* - - pluscount - count + nesting - == static sopno pluscount(register struct parse *p, register struct re_guts *g); - */ -static sopno /* nesting depth */ -pluscount(p, g) -struct parse *p; -register struct re_guts *g; -{ - register sop *scan; - register sop s; - register sopno plusnest = 0; - register sopno maxnest = 0; - - if (p->error != 0) - return(0); /* there may not be an OEND */ - - scan = g->strip + 1; - do { - s = *scan++; - switch (OP(s)) { - case OPLUS_: - plusnest++; - break; - case O_PLUS: - if (plusnest > maxnest) - maxnest = plusnest; - plusnest--; - break; - } - } while (OP(s) != OEND); - if (plusnest != 0) - g->iflags |= BAD; - return(maxnest); -} - -/* - * $PchId: regcomp.c,v 1.2 1996/03/12 19:10:15 philip Exp $ - */ Index: trunk/minix/lib/regex/regerror.c =================================================================== --- trunk/minix/lib/regex/regerror.c (revision 9) +++ (revision ) @@ -1,188 +1,0 @@ -/*- - * Copyright (c) 1992, 1993, 1994 Henry Spencer. - * Copyright (c) 1992, 1993, 1994 - * The Regents of the University of California. All rights reserved. - * - * This code is derived from software contributed to Berkeley by - * Henry Spencer. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. All advertising materials mentioning features or use of this software - * must display the following acknowledgement: - * This product includes software developed by the University of - * California, Berkeley and its contributors. - * 4. Neither the name of the University nor the names of its contributors - * may be used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - * - * @(#)regerror.c 8.4 (Berkeley) 3/20/94 - */ - -#if defined(LIBC_SCCS) && !defined(lint) -static char sccsid[] = "@(#)regerror.c 8.4 (Berkeley) 3/20/94"; -#endif /* LIBC_SCCS and not lint */ - -#include -#include -#include -#ifdef __minix_vmd -#include -#else -#include -#endif -#include -#include -#include - -#include "utils.h" - -/* ========= begin header generated by ./mkh ========= */ -#ifdef __cplusplus -extern "C" { -#endif - -/* === regerror.c === */ -static char *regatoi(const regex_t *preg, char *localbuf); - -#ifdef __cplusplus -} -#endif -/* ========= end header generated by ./mkh ========= */ -/* - = #define REG_NOMATCH 1 - = #define REG_BADPAT 2 - = #define REG_ECOLLATE 3 - = #define REG_ECTYPE 4 - = #define REG_EESCAPE 5 - = #define REG_ESUBREG 6 - = #define REG_EBRACK 7 - = #define REG_EPAREN 8 - = #define REG_EBRACE 9 - = #define REG_BADBR 10 - = #define REG_ERANGE 11 - = #define REG_ESPACE 12 - = #define REG_BADRPT 13 - = #define REG_EMPTY 14 - = #define REG_ASSERT 15 - = #define REG_INVARG 16 - = #define REG_ATOI 255 // convert name to number (!) - = #define REG_ITOA 0400 // convert number to name (!) - */ -static struct rerr { - int code; - char *name; - char *explain; -} rerrs[] = { - REG_NOMATCH, "REG_NOMATCH", "regexec() failed to match", - REG_BADPAT, "REG_BADPAT", "invalid regular expression", - REG_ECOLLATE, "REG_ECOLLATE", "invalid collating element", - REG_ECTYPE, "REG_ECTYPE", "invalid character class", - REG_EESCAPE, "REG_EESCAPE", "trailing backslash (\\)", - REG_ESUBREG, "REG_ESUBREG", "invalid backreference number", - REG_EBRACK, "REG_EBRACK", "brackets ([ ]) not balanced", - REG_EPAREN, "REG_EPAREN", "parentheses not balanced", - REG_EBRACE, "REG_EBRACE", "braces not balanced", - REG_BADBR, "REG_BADBR", "invalid repetition count(s)", - REG_ERANGE, "REG_ERANGE", "invalid character range", - REG_ESPACE, "REG_ESPACE", "out of memory", - REG_BADRPT, "REG_BADRPT", "repetition-operator operand invalid", - REG_EMPTY, "REG_EMPTY", "empty (sub)expression", - REG_ASSERT, "REG_ASSERT", "\"can't happen\" -- you found a bug", - REG_INVARG, "REG_INVARG", "invalid argument to regex routine", - 0, "", "*** unknown regexp error code ***", -}; - -/* - - regerror - the interface to error numbers - = extern size_t regerror(int, const regex_t *, char *, size_t); - */ -/* ARGSUSED */ -size_t -regerror(errcode, preg, errbuf, errbuf_size) -int errcode; -const regex_t *preg; -char *errbuf; -size_t errbuf_size; -{ - register struct rerr *r; - register size_t len; - register int target = errcode &~ REG_ITOA; - register char *s; - char convbuf[50]; - - if (errcode == REG_ATOI) - s = regatoi(preg, convbuf); - else { - for (r = rerrs; r->code != 0; r++) - if (r->code == target) - break; - - if (errcode®_ITOA) { - if (r->code != 0) - (void) strcpy(convbuf, r->name); - else - sprintf(convbuf, "REG_0x%x", target); - assert(strlen(convbuf) < sizeof(convbuf)); - s = convbuf; - } else - s = r->explain; - } - - len = strlen(s) + 1; - if (errbuf_size > 0) { - if (errbuf_size > len) - (void) strcpy(errbuf, s); - else { - (void) strncpy(errbuf, s, errbuf_size-1); - errbuf[errbuf_size-1] = '\0'; - } - } - - return(len); -} - -/* - - regatoi - internal routine to implement REG_ATOI - == static char *regatoi(const regex_t *preg, char *localbuf); - */ -static char * -regatoi(preg, localbuf) -const regex_t *preg; -char *localbuf; -{ - register struct rerr *r; - register size_t siz; - register char *p; - - for (r = rerrs; r->code != 0; r++) - if (strcmp(r->name, preg->re_endp) == 0) - break; - if (r->code == 0) - return("0"); - - sprintf(localbuf, "%d", r->code); - return(localbuf); -} - -/* - * $PchId: regerror.c,v 1.2 1996/03/12 19:10:15 philip Exp $ - */ Index: trunk/minix/lib/regex/regex.3 =================================================================== --- trunk/minix/lib/regex/regex.3 (revision 9) +++ (revision ) @@ -1,541 +1,0 @@ -.\" Copyright (c) 1992, 1993, 1994 Henry Spencer. -.\" Copyright (c) 1992, 1993, 1994 -.\" The Regents of the University of California. All rights reserved. -.\" -.\" This code is derived from software contributed to Berkeley by -.\" Henry Spencer. -.\" -.\" Redistribution and use in source and binary forms, with or without -.\" modification, are permitted provided that the following conditions -.\" are met: -.\" 1. Redistributions of source code must retain the above copyright -.\" notice, this list of conditions and the following disclaimer. -.\" 2. Redistributions in binary form must reproduce the above copyright -.\" notice, this list of conditions and the following disclaimer in the -.\" documentation and/or other materials provided with the distribution. -.\" 3. All advertising materials mentioning features or use of this software -.\" must display the following acknowledgement: -.\" This product includes software developed by the University of -.\" California, Berkeley and its contributors. -.\" 4. Neither the name of the University nor the names of its contributors -.\" may be used to endorse or promote products derived from this software -.\" without specific prior written permission. -.\" -.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND -.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE -.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE -.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE -.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL -.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS -.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) -.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT -.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY -.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF -.\" SUCH DAMAGE. -.\" -.\" @(#)regex.3 8.4 (Berkeley) 3/20/94 -.\" -.TH REGEX 3 "March 20, 1994" -.de ZR -.\" one other place knows this name: the SEE ALSO section -.BR re_format (7) \\$1 -.. -.SH NAME -regex, regcomp, regexec, regerror, regfree \- regular-expression library -.SH SYNOPSIS -.ft B -.\".na -#include -.br -#include -.sp -.in +.5i -.ti -.5i -int regcomp(regex_t *\fIpreg\fP, const char *\fIpattern\fP, int \fIcflags\fP); -.ti -.5i -int regexec(const regex_t *\fIpreg\fP, const char *\fIstring\fP, -size_t \fInmatch\fP, regmatch_t \fIpmatch\fP[], int \fIeflags\fP); -.ti -.5i -size_t regerror(int \fIerrcode\fP, const regex_t *\fIpreg\fP, -char *\fIerrbuf\fP, size_t \fIerrbuf_size\fP); -.ti -.5i -void regfree(regex_t *\fIpreg\fP); -.in -.5i -.ft R -.SH DESCRIPTION -These routines implement POSIX 1003.2 regular expressions (``RE''s); -see -.ZR . -.B Regcomp -compiles an RE written as a string into an internal form, -.B regexec -matches that internal form against a string and reports results, -.B regerror -transforms error codes from either into human-readable messages, -and -.B regfree -frees any dynamically-allocated storage used by the internal form -of an RE. -.PP -The header -.I -declares two structure types, -.B regex_t -and -.BR regmatch_t , -the former for compiled internal forms and the latter for match reporting. -It also declares the four functions, -a type -.BR regoff_t , -and a number of constants with names starting with ``REG_''. -.PP -.B Regcomp -compiles the regular expression contained in the -.I pattern -string, -subject to the flags in -.IR cflags , -and places the results in the -.B regex_t -structure pointed to by -.IR preg . -.I Cflags -is the bitwise OR of zero or more of the following flags: -.IP REG_EXTENDED \w'REG_EXTENDED'u+2n -Compile modern (``extended'') REs, -rather than the obsolete (``basic'') REs that -are the default. -.IP REG_BASIC -This is a synonym for 0, -provided as a counterpart to REG_EXTENDED to improve readability. -.IP REG_NOSPEC -Compile with recognition of all special characters turned off. -All characters are thus considered ordinary, -so the ``RE'' is a literal string. -This is an extension, -compatible with but not specified by POSIX 1003.2, -and should be used with -caution in software intended to be portable to other systems. -REG_EXTENDED and REG_NOSPEC may not be used -in the same call to -.IR regcomp . -.IP REG_ICASE -Compile for matching that ignores upper/lower case distinctions. -See -.ZR . -.IP REG_NOSUB -Compile for matching that need only report success or failure, -not what was matched. -.IP REG_NEWLINE -Compile for newline-sensitive matching. -By default, newline is a completely ordinary character with no special -meaning in either REs or strings. -With this flag, -`[^' bracket expressions and `.' never match newline, -a `^' anchor matches the null string after any newline in the string -in addition to its normal function, -and the `$' anchor matches the null string before any newline in the -string in addition to its normal function. -.IP REG_PEND -The regular expression ends, -not at the first NUL, -but just before the character pointed to by the -.B re_endp -member of the structure pointed to by -.IR preg . -The -.B re_endp -member is of type -.BR "const\ char\ *" . -This flag permits inclusion of NULs in the RE; -they are considered ordinary characters. -This is an extension, -compatible with but not specified by POSIX 1003.2, -and should be used with -caution in software intended to be portable to other systems. -.PP -When successful, -.B regcomp -returns 0 and fills in the structure pointed to by -.IR preg . -One member of that structure -(other than -.BR re_endp ) -is publicized: -.BR re_nsub , -of type -.BR size_t , -contains the number of parenthesized subexpressions within the RE -(except that the value of this member is undefined if the -REG_NOSUB flag was used). -If -.B regcomp -fails, it returns a non-zero error code; -see DIAGNOSTICS. -.PP -.B Regexec -matches the compiled RE pointed to by -.I preg -against the -.IR string , -subject to the flags in -.IR eflags , -and reports results using -.IR nmatch , -.IR pmatch , -and the returned value. -The RE must have been compiled by a previous invocation of -.BR regcomp . -The compiled form is not altered during execution of -.BR regexec , -so a single compiled RE can be used simultaneously by multiple threads. -.PP -By default, -the NUL-terminated string pointed to by -.I string -is considered to be the text of an entire line, minus any terminating -newline. -The -.I eflags -argument is the bitwise OR of zero or more of the following flags: -.IP REG_NOTBOL \w'REG_STARTEND'u+2n -The first character of -the string -is not the beginning of a line, so the `^' anchor should not match before it. -This does not affect the behavior of newlines under REG_NEWLINE. -.IP REG_NOTEOL -The NUL terminating -the string -does not end a line, so the `$' anchor should not match before it. -This does not affect the behavior of newlines under REG_NEWLINE. -.IP REG_STARTEND -The string is considered to start at -\fIstring\fR\ + \fIpmatch\fR[0].\fBrm_so\fR -and to have a terminating NUL located at -\fIstring\fR\ + \fIpmatch\fR[0].\fBrm_eo\fR -(there need not actually be a NUL at that location), -regardless of the value of -.IR nmatch . -See below for the definition of -.IR pmatch -and -.IR nmatch . -This is an extension, -compatible with but not specified by POSIX 1003.2, -and should be used with -caution in software intended to be portable to other systems. -Note that a non-zero \fBrm_so\fR does not imply REG_NOTBOL; -REG_STARTEND affects only the location of the string, -not how it is matched. -.PP -See -.ZR -for a discussion of what is matched in situations where an RE or a -portion thereof could match any of several substrings of -.IR string . -.PP -Normally, -.B regexec -returns 0 for success and the non-zero code REG_NOMATCH for failure. -Other non-zero error codes may be returned in exceptional situations; -see DIAGNOSTICS. -.PP -If REG_NOSUB was specified in the compilation of the RE, -or if -.I nmatch -is 0, -.B regexec -ignores the -.I pmatch -argument (but see below for the case where REG_STARTEND is specified). -Otherwise, -.I pmatch -points to an array of -.I nmatch -structures of type -.BR regmatch_t . -Such a structure has at least the members -.B rm_so -and -.BR rm_eo , -both of type -.B regoff_t -(a signed arithmetic type at least as large as an -.B off_t -and a -.BR ssize_t ), -containing respectively the offset of the first character of a substring -and the offset of the first character after the end of the substring. -Offsets are measured from the beginning of the -.I string -argument given to -.BR regexec . -An empty substring is denoted by equal offsets, -both indicating the character following the empty substring. -.PP -The 0th member of the -.I pmatch -array is filled in to indicate what substring of -.I string -was matched by the entire RE. -Remaining members report what substring was matched by parenthesized -subexpressions within the RE; -member -.I i -reports subexpression -.IR i , -with subexpressions counted (starting at 1) by the order of their opening -parentheses in the RE, left to right. -Unused entries in the array\(emcorresponding either to subexpressions that -did not participate in the match at all, or to subexpressions that do not -exist in the RE (that is, \fIi\fR\ > \fIpreg\fR\->\fBre_nsub\fR)\(emhave both -.B rm_so -and -.B rm_eo -set to \-1. -If a subexpression participated in the match several times, -the reported substring is the last one it matched. -(Note, as an example in particular, that when the RE `(b*)+' matches `bbb', -the parenthesized subexpression matches each of the three `b's and then -an infinite number of empty strings following the last `b', -so the reported substring is one of the empties.) -.PP -If REG_STARTEND is specified, -.I pmatch -must point to at least one -.B regmatch_t -(even if -.I nmatch -is 0 or REG_NOSUB was specified), -to hold the input offsets for REG_STARTEND. -Use for output is still entirely controlled by -.IR nmatch ; -if -.I nmatch -is 0 or REG_NOSUB was specified, -the value of -.IR pmatch [0] -will not be changed by a successful -.BR regexec . -.PP -.B Regerror -maps a non-zero -.I errcode -from either -.B regcomp -or -.B regexec -to a human-readable, printable message. -If -.I preg -is non-NULL, -the error code should have arisen from use of -the -.B regex_t -pointed to by -.IR preg , -and if the error code came from -.BR regcomp , -it should have been the result from the most recent -.B regcomp -using that -.BR regex_t . -.RI ( Regerror -may be able to supply a more detailed message using information -from the -.BR regex_t .) -.B Regerror -places the NUL-terminated message into the buffer pointed to by -.IR errbuf , -limiting the length (including the NUL) to at most -.I errbuf_size -bytes. -If the whole message won't fit, -as much of it as will fit before the terminating NUL is supplied. -In any case, -the returned value is the size of buffer needed to hold the whole -message (including terminating NUL). -If -.I errbuf_size -is 0, -.I errbuf -is ignored but the return value is still correct. -.PP -If the -.I errcode -given to -.B regerror -is first ORed with REG_ITOA, -the ``message'' that results is the printable name of the error code, -e.g. ``REG_NOMATCH'', -rather than an explanation thereof. -If -.I errcode -is REG_ATOI, -then -.I preg -shall be non-NULL and the -.B re_endp -member of the structure it points to -must point to the printable name of an error code; -in this case, the result in -.I errbuf -is the decimal digits of -the numeric value of the error code -(0 if the name is not recognized). -REG_ITOA and REG_ATOI are intended primarily as debugging facilities; -they are extensions, -compatible with but not specified by POSIX 1003.2, -and should be used with -caution in software intended to be portable to other systems. -Be warned also that they are considered experimental and changes are possible. -.PP -.B Regfree -frees any dynamically-allocated storage associated with the compiled RE -pointed to by -.IR preg . -The remaining -.B regex_t -is no longer a valid compiled RE -and the effect of supplying it to -.B regexec -or -.B regerror -is undefined. -.PP -None of these functions references global variables except for tables -of constants; -all are safe for use from multiple threads if the arguments are safe. -.SH IMPLEMENTATION CHOICES -There are a number of decisions that 1003.2 leaves up to the implementor, -either by explicitly saying ``undefined'' or by virtue of them being -forbidden by the RE grammar. -This implementation treats them as follows. -.PP -See -.ZR -for a discussion of the definition of case-independent matching. -.PP -There is no particular limit on the length of REs, -except insofar as memory is limited. -Memory usage is approximately linear in RE size, and largely insensitive -to RE complexity, except for bounded repetitions. -See BUGS for one short RE using them -that will run almost any system out of memory. -.PP -A backslashed character other than one specifically given a magic meaning -by 1003.2 (such magic meanings occur only in obsolete [``basic''] REs) -is taken as an ordinary character. -.PP -Any unmatched [ is a REG_EBRACK error. -.PP -Equivalence classes cannot begin or end bracket-expression ranges. -The endpoint of one range cannot begin another. -.PP -RE_DUP_MAX, the limit on repetition counts in bounded repetitions, is 255. -.PP -A repetition operator (?, *, +, or bounds) cannot follow another -repetition operator. -A repetition operator cannot begin an expression or subexpression -or follow `^' or `|'. -.PP -`|' cannot appear first or last in a (sub)expression or after another `|', -i.e. an operand of `|' cannot be an empty subexpression. -An empty parenthesized subexpression, `()', is legal and matches an -empty (sub)string. -An empty string is not a legal RE. -.PP -A `{' followed by a digit is considered the beginning of bounds for a -bounded repetition, which must then follow the syntax for bounds. -A `{' \fInot\fR followed by a digit is considered an ordinary character. -.PP -`^' and `$' beginning and ending subexpressions in obsolete (``basic'') -REs are anchors, not ordinary characters. -.SH SEE ALSO -.BR grep (1), -.BR re_format (7). -.PP -POSIX 1003.2, sections 2.8 (Regular Expression Notation) -and -B.5 (C Binding for Regular Expression Matching). -.SH DIAGNOSTICS -Non-zero error codes from -.B regcomp -and -.B regexec -include the following: -.PP -.nf -.ta \w'REG_ECOLLATE'u+3n -REG_NOMATCH regexec() failed to match -REG_BADPAT invalid regular expression -REG_ECOLLATE invalid collating element -REG_ECTYPE invalid character class -REG_EESCAPE \e applied to unescapable character -REG_ESUBREG invalid backreference number -REG_EBRACK brackets [ ] not balanced -REG_EPAREN parentheses ( ) not balanced -REG_EBRACE braces { } not balanced -REG_BADBR invalid repetition count(s) in { } -REG_ERANGE invalid character range in [ ] -REG_ESPACE ran out of memory -REG_BADRPT ?, *, or + operand invalid -REG_EMPTY empty (sub)expression -REG_ASSERT ``can't happen''\(emyou found a bug -REG_INVARG invalid argument, e.g. negative-length string -.fi -.SH HISTORY -Originally written by Henry Spencer. -Altered for inclusion in the 4.4BSD distribution. -.SH BUGS -This is an alpha release with known defects. -Please report problems. -.PP -There is one known functionality bug. -The implementation of internationalization is incomplete: -the locale is always assumed to be the default one of 1003.2, -and only the collating elements etc. of that locale are available. -.PP -The back-reference code is subtle and doubts linger about its correctness -in complex cases. -.PP -.B Regexec -performance is poor. -This will improve with later releases. -.I Nmatch -exceeding 0 is expensive; -.I nmatch -exceeding 1 is worse. -.B Regexec -is largely insensitive to RE complexity \fIexcept\fR that back -references are massively expensive. -RE length does matter; in particular, there is a strong speed bonus -for keeping RE length under about 30 characters, -with most special characters counting roughly double. -.PP -.B Regcomp -implements bounded repetitions by macro expansion, -which is costly in time and space if counts are large -or bounded repetitions are nested. -An RE like, say, -`((((a{1,100}){1,100}){1,100}){1,100}){1,100}' -will (eventually) run almost any existing machine out of swap space. -.PP -There are suspected problems with response to obscure error conditions. -Notably, -certain kinds of internal overflow, -produced only by truly enormous REs or by multiply nested bounded repetitions, -are probably not handled well. -.PP -Due to a mistake in 1003.2, things like `a)b' are legal REs because `)' is -a special character only in the presence of a previous unmatched `('. -This can't be fixed until the spec is fixed. -.PP -The standard's definition of back references is vague. -For example, does -`a\e(\e(b\e)*\e2\e)*d' match `abbbd'? -Until the standard is clarified, -behavior in such cases should not be relied on. -.PP -The implementation of word-boundary matching is a bit of a kludge, -and bugs may lurk in combinations of word-boundary matching and anchoring. Index: trunk/minix/lib/regex/regex2.h =================================================================== --- trunk/minix/lib/regex/regex2.h (revision 9) +++ (revision ) @@ -1,173 +1,0 @@ -/*- - * Copyright (c) 1992, 1993, 1994 Henry Spencer. - * Copyright (c) 1992, 1993, 1994 - * The Regents of the University of California. All rights reserved. - * - * This code is derived from software contributed to Berkeley by - * Henry Spencer. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. All advertising materials mentioning features or use of this software - * must display the following acknowledgement: - * This product includes software developed by the University of - * California, Berkeley and its contributors. - * 4. Neither the name of the University nor the names of its contributors - * may be used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - * - * @(#)regex2.h 8.4 (Berkeley) 3/20/94 - */ - -/* - * First, the stuff that ends up in the outside-world include file - = typedef off_t regoff_t; - = typedef struct { - = int re_magic; - = size_t re_nsub; // number of parenthesized subexpressions - = const char *re_endp; // end pointer for REG_PEND - = struct re_guts *re_g; // none of your business :-) - = } regex_t; - = typedef struct { - = regoff_t rm_so; // start of match - = regoff_t rm_eo; // end of match - = } regmatch_t; - */ -/* - * internals of regex_t - */ -#define MAGIC1 ((('r'^0200)<<8) | 'e') - -/* - * The internal representation is a *strip*, a sequence of - * operators ending with an endmarker. (Some terminology etc. is a - * historical relic of earlier versions which used multiple strips.) - * Certain oddities in the representation are there to permit running - * the machinery backwards; in particular, any deviation from sequential - * flow must be marked at both its source and its destination. Some - * fine points: - * - * - OPLUS_ and O_PLUS are *inside* the loop they create. - * - OQUEST_ and O_QUEST are *outside* the bypass they create. - * - OCH_ and O_CH are *outside* the multi-way branch they create, while - * OOR1 and OOR2 are respectively the end and the beginning of one of - * the branches. Note that there is an implicit OOR2 following OCH_ - * and an implicit OOR1 preceding O_CH. - * - * In state representations, an operator's bit is on to signify a state - * immediately *preceding* "execution" of that operator. - */ -typedef unsigned long sop; /* strip operator */ -typedef long sopno; -#define OPRMASK 0xf8000000 -#define OPDMASK 0x07ffffff -#define OPSHIFT ((unsigned)27) -#define OP(n) ((n)&OPRMASK) -#define OPND(n) ((n)&OPDMASK) -#define SOP(op, opnd) ((op)|(opnd)) -/* operators meaning operand */ -/* (back, fwd are offsets) */ -#define OEND (1< uch [csetsize] */ - uch mask; /* bit within array */ - uch hash; /* hash code */ - size_t smultis; - char *multis; /* -> char[smulti] ab\0cd\0ef\0\0 */ -} cset; -/* note that CHadd and CHsub are unsafe, and CHIN doesn't yield 0/1 */ -#define CHadd(cs, c) ((cs)->ptr[(uch)(c)] |= (cs)->mask, (cs)->hash += (c)) -#define CHsub(cs, c) ((cs)->ptr[(uch)(c)] &= ~(cs)->mask, (cs)->hash -= (c)) -#define CHIN(cs, c) ((cs)->ptr[(uch)(c)] & (cs)->mask) -#define MCadd(p, cs, cp) mcadd(p, cs, cp) /* regcomp() internal fns */ -#define MCsub(p, cs, cp) mcsub(p, cs, cp) -#define MCin(p, cs, cp) mcin(p, cs, cp) - -/* stuff for character categories */ -typedef unsigned char cat_t; - -/* - * main compiled-expression structure - */ -struct re_guts { - int magic; -# define MAGIC2 ((('R'^0200)<<8)|'E') - sop *strip; /* malloced area for strip */ - int csetsize; /* number of bits in a cset vector */ - int ncsets; /* number of csets in use */ - cset *sets; /* -> cset [ncsets] */ - uch *setbits; /* -> uch[csetsize][ncsets/CHAR_BIT] */ - int cflags; /* copy of regcomp() cflags argument */ - sopno nstates; /* = number of sops */ - sopno firststate; /* the initial OEND (normally 0) */ - sopno laststate; /* the final OEND */ - int iflags; /* internal flags */ -# define USEBOL 01 /* used ^ */ -# define USEEOL 02 /* used $ */ -# define BAD 04 /* something wrong */ - int nbol; /* number of ^ used */ - int neol; /* number of $ used */ - int ncategories; /* how many character categories */ - cat_t *categories; /* ->catspace[-CHAR_MIN] */ - char *must; /* match must contain this string */ - int mlen; /* length of must */ - size_t nsub; /* copy of re_nsub */ - int backrefs; /* does it use back references? */ - sopno nplus; /* how deep does it nest +s? */ - /* catspace must be last */ - cat_t catspace[1]; /* actually [NC] */ -}; - -/* misc utilities */ -#define OUT (CHAR_MAX+1) /* a non-character value */ -#define ISWORD(c) (isalnum(c) || (c) == '_') Index: trunk/minix/lib/regex/regexec.c =================================================================== --- trunk/minix/lib/regex/regexec.c (revision 9) +++ (revision ) @@ -1,189 +1,0 @@ -/*- - * Copyright (c) 1992, 1993, 1994 Henry Spencer. - * Copyright (c) 1992, 1993, 1994 - * The Regents of the University of California. All rights reserved. - * - * This code is derived from software contributed to Berkeley by - * Henry Spencer. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. All advertising materials mentioning features or use of this software - * must display the following acknowledgement: - * This product includes software developed by the University of - * California, Berkeley and its contributors. - * 4. Neither the name of the University nor the names of its contributors - * may be used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - * - * @(#)regexec.c 8.3 (Berkeley) 3/20/94 - */ - -#if defined(LIBC_SCCS) && !defined(lint) -static char sccsid[] = "@(#)regexec.c 8.3 (Berkeley) 3/20/94"; -#endif /* LIBC_SCCS and not lint */ - -/* - * the outer shell of regexec() - * - * This file includes engine.c *twice*, after muchos fiddling with the - * macros that code uses. This lets the same code operate on two different - * representations for state sets. - */ -#include -#include -#include -#include -#include -#ifdef __minix_vmd -#include -#else -#include -#endif -#include - -#include "utils.h" -#include "regex2.h" - -static int nope = 0; /* for use in asserts; shuts lint up */ - -/* macros for manipulating states, small version */ -#define states long -#define states1 states /* for later use in regexec() decision */ -#define CLEAR(v) ((v) = 0) -#define SET0(v, n) ((v) &= ~(1 << (n))) -#define SET1(v, n) ((v) |= 1 << (n)) -#define ISSET(v, n) ((v) & (1 << (n))) -#define ASSIGN(d, s) ((d) = (s)) -#define EQ(a, b) ((a) == (b)) -#define STATEVARS int dummy /* dummy version */ -#define STATESETUP(m, n) /* nothing */ -#define STATETEARDOWN(m) /* nothing */ -#define SETUP(v) ((v) = 0) -#define onestate int -#define INIT(o, n) ((o) = (unsigned)1 << (n)) -#define INC(o) ((o) <<= 1) -#define ISSTATEIN(v, o) ((v) & (o)) -/* some abbreviations; note that some of these know variable names! */ -/* do "if I'm here, I can also be there" etc without branches */ -#define FWD(dst, src, n) ((dst) |= ((unsigned)(src)&(here)) << (n)) -#define BACK(dst, src, n) ((dst) |= ((unsigned)(src)&(here)) >> (n)) -#define ISSETBACK(v, n) ((v) & ((unsigned)here >> (n))) -/* function names */ -#define SNAMES /* engine.c looks after details */ - -#include "engine.c" - -/* now undo things */ -#undef states -#undef CLEAR -#undef SET0 -#undef SET1 -#undef ISSET -#undef ASSIGN -#undef EQ -#undef STATEVARS -#undef STATESETUP -#undef STATETEARDOWN -#undef SETUP -#undef onestate -#undef INIT -#undef INC -#undef ISSTATEIN -#undef FWD -#undef BACK -#undef ISSETBACK -#undef SNAMES - -/* macros for manipulating states, large version */ -#define states char * -#define CLEAR(v) memset(v, 0, m->g->nstates) -#define SET0(v, n) ((v)[n] = 0) -#define SET1(v, n) ((v)[n] = 1) -#define ISSET(v, n) ((v)[n]) -#define ASSIGN(d, s) memcpy(d, s, m->g->nstates) -#define EQ(a, b) (memcmp(a, b, m->g->nstates) == 0) -#define STATEVARS int vn; char *space -#define STATESETUP(m, nv) { (m)->space = malloc((nv)*(m)->g->nstates); \ - if ((m)->space == NULL) return(REG_ESPACE); \ - (m)->vn = 0; } -#define STATETEARDOWN(m) { free((m)->space); } -#define SETUP(v) ((v) = &m->space[m->vn++ * m->g->nstates]) -#define onestate int -#define INIT(o, n) ((o) = (n)) -#define INC(o) ((o)++) -#define ISSTATEIN(v, o) ((v)[o]) -/* some abbreviations; note that some of these know variable names! */ -/* do "if I'm here, I can also be there" etc without branches */ -#define FWD(dst, src, n) ((dst)[here+(n)] |= (src)[here]) -#define BACK(dst, src, n) ((dst)[here-(n)] |= (src)[here]) -#define ISSETBACK(v, n) ((v)[here - (n)]) -/* function names */ -#define LNAMES /* flag */ - -#include "engine.c" - -/* - - regexec - interface for matching - = extern int regexec(const regex_t *, const char *, size_t, \ - = regmatch_t [], int); - = #define REG_NOTBOL 00001 - = #define REG_NOTEOL 00002 - = #define REG_STARTEND 00004 - = #define REG_TRACE 00400 // tracing of execution - = #define REG_LARGE 01000 // force large representation - = #define REG_BACKR 02000 // force use of backref code - * - * We put this here so we can exploit knowledge of the state representation - * when choosing which matcher to call. Also, by this point the matchers - * have been prototyped. - */ -int /* 0 success, REG_NOMATCH failure */ -regexec(preg, string, nmatch, pmatch, eflags) -const regex_t *preg; -const char *string; -size_t nmatch; -regmatch_t pmatch[]; -int eflags; -{ - register struct re_guts *g = preg->re_g; -#ifdef REDEBUG -# define GOODFLAGS(f) (f) -#else -# define GOODFLAGS(f) ((f)&(REG_NOTBOL|REG_NOTEOL|REG_STARTEND)) -#endif - - if (preg->re_magic != MAGIC1 || g->magic != MAGIC2) - return(REG_BADPAT); - assert(!(g->iflags&BAD)); - if (g->iflags&BAD) /* backstop for no-debug case */ - return(REG_BADPAT); - eflags = GOODFLAGS(eflags); - - if (g->nstates <= CHAR_BIT*sizeof(states1) && !(eflags®_LARGE)) - return(smatcher(g, (char *)string, nmatch, pmatch, eflags)); - else - return(lmatcher(g, (char *)string, nmatch, pmatch, eflags)); -} - -/* - * $PchId: regexec.c,v 1.2 1996/03/12 19:10:15 philip Exp $ - */ Index: trunk/minix/lib/regex/regfree.c =================================================================== --- trunk/minix/lib/regex/regfree.c (revision 9) +++ (revision ) @@ -1,84 +1,0 @@ -/*- - * Copyright (c) 1992, 1993, 1994 Henry Spencer. - * Copyright (c) 1992, 1993, 1994 - * The Regents of the University of California. All rights reserved. - * - * This code is derived from software contributed to Berkeley by - * Henry Spencer. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. All advertising materials mentioning features or use of this software - * must display the following acknowledgement: - * This product includes software developed by the University of - * California, Berkeley and its contributors. - * 4. Neither the name of the University nor the names of its contributors - * may be used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - * - * @(#)regfree.c 8.3 (Berkeley) 3/20/94 - */ - -#if defined(LIBC_SCCS) && !defined(lint) -static char sccsid[] = "@(#)regfree.c 8.3 (Berkeley) 3/20/94"; -#endif /* LIBC_SCCS and not lint */ - -#include -#include -#include -#include - -#include "utils.h" -#include "regex2.h" - -/* - - regfree - free everything - = extern void regfree(regex_t *); - */ -void -regfree(preg) -regex_t *preg; -{ - register struct re_guts *g; - - if (preg->re_magic != MAGIC1) /* oops */ - return; /* nice to complain, but hard */ - - g = preg->re_g; - if (g == NULL || g->magic != MAGIC2) /* oops again */ - return; - preg->re_magic = 0; /* mark it invalid */ - g->magic = 0; /* mark it invalid */ - - if (g->strip != NULL) - free((char *)g->strip); - if (g->sets != NULL) - free((char *)g->sets); - if (g->setbits != NULL) - free((char *)g->setbits); - if (g->must != NULL) - free(g->must); - free((char *)g); -} - -/* - * $PchId: regfree.c,v 1.2 1996/03/12 19:10:15 philip Exp $ - */ Index: trunk/minix/lib/regex/utils.h =================================================================== --- trunk/minix/lib/regex/utils.h (revision 9) +++ (revision ) @@ -1,61 +1,0 @@ -/*- - * Copyright (c) 1992, 1993, 1994 Henry Spencer. - * Copyright (c) 1992, 1993, 1994 - * The Regents of the University of California. All rights reserved. - * - * This code is derived from software contributed to Berkeley by - * Henry Spencer. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. All advertising materials mentioning features or use of this software - * must display the following acknowledgement: - * This product includes software developed by the University of - * California, Berkeley and its contributors. - * 4. Neither the name of the University nor the names of its contributors - * may be used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - * - * @(#)utils.h 8.3 (Berkeley) 3/20/94 - */ - -/* utility definitions */ -#ifdef _POSIX2_RE_DUP_MAX -#define DUPMAX _POSIX2_RE_DUP_MAX /* xxx is this right? */ -#else -#define DUPMAX 255 -#endif -#define INFINITY (DUPMAX + 1) -#define NC (CHAR_MAX - CHAR_MIN + 1) -typedef unsigned char uch; - -/* switch off assertions (if not already off) if no REDEBUG */ -#ifndef REDEBUG -#ifndef NDEBUG -#define NDEBUG /* no assertions please */ -#endif -#endif -#include - -/* for old systems with bcopy() but no memmove() */ -#ifdef USEBCOPY -#define memmove(d, s, c) bcopy(s, d, c) -#endif