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authorcvs2svn <>2012-12-21 01:10:28 +0400
committercvs2svn <>2012-12-21 01:10:28 +0400
commitd2e568e10ab953bacedd6406558b2d7ed707cc36 (patch)
tree543b59ca96723fb02b1337a37fa7b3fcd07c20da /winsup/cygwin/regex/engine.c
parentf2d223bd0fa6fdf1a0328d5bfcc83140f0e1150e (diff)
This commit was manufactured by cvs2svn to create tag 'newlib-2_0_0'.newlib-2_0_0
Sprout from master 2012-12-20 21:10:27 UTC Jeff Johnston <jjohnstn@redhat.com> '' Cherrypick from cygnus 1999-05-03 07:29:06 UTC Richard Henderson <rth@redhat.com> '19990502 sourceware import': README config/mt-d30v config/mt-ospace etc/add-log.el etc/add-log.vi etc/configbuild.ein etc/configbuild.fig etc/configbuild.jin etc/configbuild.tin etc/configdev.ein etc/configdev.fig etc/configdev.jin etc/configdev.tin makefile.vms Delete: djunpack.bat include/COPYING include/COPYING3 include/ChangeLog include/ChangeLog-9103 include/MAINTAINERS include/alloca-conf.h include/ansidecl.h include/aout/ChangeLog include/aout/adobe.h include/aout/aout64.h include/aout/ar.h include/aout/dynix3.h include/aout/encap.h include/aout/host.h include/aout/hp.h include/aout/hp300hpux.h include/aout/hppa.h include/aout/ranlib.h include/aout/reloc.h include/aout/stab.def include/aout/stab_gnu.h include/aout/sun4.h include/bfdlink.h include/binary-io.h include/bout.h include/cgen/ChangeLog include/cgen/basic-modes.h include/cgen/basic-ops.h include/cgen/bitset.h include/coff/ChangeLog include/coff/ChangeLog-9103 include/coff/alpha.h include/coff/apollo.h include/coff/arm.h include/coff/aux-coff.h include/coff/ecoff.h include/coff/external.h include/coff/go32exe.h include/coff/h8300.h include/coff/h8500.h include/coff/i386.h include/coff/i860.h include/coff/i960.h include/coff/ia64.h include/coff/internal.h include/coff/m68k.h include/coff/m88k.h include/coff/mcore.h include/coff/mips.h include/coff/mipspe.h include/coff/or32.h include/coff/pe.h include/coff/powerpc.h include/coff/rs6000.h include/coff/rs6k64.h include/coff/sh.h include/coff/sparc.h include/coff/sym.h include/coff/symconst.h include/coff/ti.h include/coff/tic30.h include/coff/tic4x.h include/coff/tic54x.h include/coff/tic80.h include/coff/w65.h include/coff/we32k.h include/coff/x86_64.h include/coff/xcoff.h include/coff/z80.h include/coff/z8k.h include/demangle.h include/dis-asm.h include/dwarf2.def 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winsup/testsuite/winsup.api/pthread/cancel6.c winsup/testsuite/winsup.api/pthread/cancel7.c winsup/testsuite/winsup.api/pthread/cancel8.c winsup/testsuite/winsup.api/pthread/cancel9.c winsup/testsuite/winsup.api/pthread/cleanup2.c winsup/testsuite/winsup.api/pthread/cleanup3.c winsup/testsuite/winsup.api/pthread/condvar1.c winsup/testsuite/winsup.api/pthread/condvar2.c winsup/testsuite/winsup.api/pthread/condvar2_1.c winsup/testsuite/winsup.api/pthread/condvar3.c winsup/testsuite/winsup.api/pthread/condvar3_1.c winsup/testsuite/winsup.api/pthread/condvar3_2.c winsup/testsuite/winsup.api/pthread/condvar3_3.c winsup/testsuite/winsup.api/pthread/condvar4.c winsup/testsuite/winsup.api/pthread/condvar5.c winsup/testsuite/winsup.api/pthread/condvar6.c winsup/testsuite/winsup.api/pthread/condvar7.c winsup/testsuite/winsup.api/pthread/condvar8.c winsup/testsuite/winsup.api/pthread/condvar9.c winsup/testsuite/winsup.api/pthread/count1.c winsup/testsuite/winsup.api/pthread/create1.c winsup/testsuite/winsup.api/pthread/create2.c winsup/testsuite/winsup.api/pthread/equal1.c winsup/testsuite/winsup.api/pthread/exit1.c winsup/testsuite/winsup.api/pthread/exit2.c winsup/testsuite/winsup.api/pthread/exit3.c winsup/testsuite/winsup.api/pthread/inherit1.c winsup/testsuite/winsup.api/pthread/join0.c winsup/testsuite/winsup.api/pthread/join1.c winsup/testsuite/winsup.api/pthread/join2.c winsup/testsuite/winsup.api/pthread/mainthreadexits.c winsup/testsuite/winsup.api/pthread/mutex1.c winsup/testsuite/winsup.api/pthread/mutex1d.c winsup/testsuite/winsup.api/pthread/mutex1e.c winsup/testsuite/winsup.api/pthread/mutex1n.c winsup/testsuite/winsup.api/pthread/mutex1r.c winsup/testsuite/winsup.api/pthread/mutex2.c winsup/testsuite/winsup.api/pthread/mutex3.c winsup/testsuite/winsup.api/pthread/mutex4.c winsup/testsuite/winsup.api/pthread/mutex5.c winsup/testsuite/winsup.api/pthread/mutex6d.c winsup/testsuite/winsup.api/pthread/mutex6e.c winsup/testsuite/winsup.api/pthread/mutex6n.c winsup/testsuite/winsup.api/pthread/mutex6r.c winsup/testsuite/winsup.api/pthread/mutex7.c winsup/testsuite/winsup.api/pthread/mutex7d.c winsup/testsuite/winsup.api/pthread/mutex7e.c winsup/testsuite/winsup.api/pthread/mutex7n.c winsup/testsuite/winsup.api/pthread/mutex7r.c winsup/testsuite/winsup.api/pthread/mutex8e.c winsup/testsuite/winsup.api/pthread/mutex8n.c winsup/testsuite/winsup.api/pthread/mutex8r.c winsup/testsuite/winsup.api/pthread/once1.c winsup/testsuite/winsup.api/pthread/priority1.c winsup/testsuite/winsup.api/pthread/priority2.c winsup/testsuite/winsup.api/pthread/rwlock1.c winsup/testsuite/winsup.api/pthread/rwlock2.c winsup/testsuite/winsup.api/pthread/rwlock3.c winsup/testsuite/winsup.api/pthread/rwlock4.c winsup/testsuite/winsup.api/pthread/rwlock5.c winsup/testsuite/winsup.api/pthread/rwlock6.c winsup/testsuite/winsup.api/pthread/rwlock7.c winsup/testsuite/winsup.api/pthread/self1.c winsup/testsuite/winsup.api/pthread/self2.c winsup/testsuite/winsup.api/pthread/test.h winsup/testsuite/winsup.api/pthread/threadidafterfork.c winsup/testsuite/winsup.api/pthread/tsd1.c winsup/testsuite/winsup.api/resethand.c winsup/testsuite/winsup.api/samples/sample-fail.c winsup/testsuite/winsup.api/samples/sample-miscompile.c winsup/testsuite/winsup.api/samples/sample-pass.c winsup/testsuite/winsup.api/semtest.c winsup/testsuite/winsup.api/shmtest.c winsup/testsuite/winsup.api/sigchld.c winsup/testsuite/winsup.api/signal-into-win32-api.c winsup/testsuite/winsup.api/systemcall.c winsup/testsuite/winsup.api/user_malloc.c winsup/testsuite/winsup.api/waitpid.c winsup/testsuite/winsup.api/winsup.exp winsup/utils/COPYING.dumper winsup/utils/ChangeLog winsup/utils/ChangeLog-2000 winsup/utils/Makefile.in winsup/utils/aclocal.m4 winsup/utils/autogen.sh winsup/utils/bloda.cc winsup/utils/configure winsup/utils/configure.ac winsup/utils/cygcheck.cc winsup/utils/cygpath.cc winsup/utils/cygwin-console-helper.cc winsup/utils/dump_setup.cc winsup/utils/dumper.cc winsup/utils/dumper.h winsup/utils/getconf.c winsup/utils/getfacl.c winsup/utils/kill.cc winsup/utils/ldd.cc winsup/utils/ldh.cc winsup/utils/loadlib.h winsup/utils/locale.cc winsup/utils/mkgroup.c winsup/utils/mkpasswd.c winsup/utils/module_info.cc winsup/utils/mount.cc winsup/utils/parse_pe.cc winsup/utils/passwd.c winsup/utils/path.cc winsup/utils/path.h winsup/utils/pldd.c winsup/utils/ps.cc winsup/utils/regtool.cc winsup/utils/setfacl.c winsup/utils/setmetamode.c winsup/utils/ssp.c winsup/utils/ssp.txt winsup/utils/strace.cc winsup/utils/testsuite.cc winsup/utils/testsuite.h winsup/utils/tzset.c winsup/utils/umount.cc winsup/utils/utils.sgml winsup/utils/wide_path.h
Diffstat (limited to 'winsup/cygwin/regex/engine.c')
-rw-r--r--winsup/cygwin/regex/engine.c1197
1 files changed, 0 insertions, 1197 deletions
diff --git a/winsup/cygwin/regex/engine.c b/winsup/cygwin/regex/engine.c
deleted file mode 100644
index 4afaf8d9a..000000000
--- a/winsup/cygwin/regex/engine.c
+++ /dev/null
@@ -1,1197 +0,0 @@
-/*-
- * 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.
- * 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
- */
-
-#include <sys/cdefs.h>
-__FBSDID("$FreeBSD: src/lib/libc/regex/engine.c,v 1.23 2009/09/16 06:32:23 dds Exp $");
-
-/*
- * 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
-#ifdef MNAMES
-#define matcher mmatcher
-#define fast mfast
-#define slow mslow
-#define dissect mdissect
-#define backref mbackref
-#define step mstep
-#define print mprint
-#define at mat
-#define match mmat
-#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) */
- const char *offp; /* offsets work from here */
- const char *beginp; /* start of string -- virtual NUL precedes */
- const char *endp; /* end of string -- virtual NUL here */
- const char *coldp; /* can be no match starting before here */
- const 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 */
- mbstate_t mbs; /* multibyte conversion state */
-};
-
-/* ========= begin header generated by ./mkh ========= */
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-/* === engine.c === */
-static int matcher(struct re_guts *g, const char *string, size_t nmatch, regmatch_t pmatch[], int eflags);
-static const char *dissect(struct match *m, const char *start, const char *stop, sopno startst, sopno stopst);
-static const char *backref(struct match *m, const char *start, const char *stop, sopno startst, sopno stopst, sopno lev, int);
-static const char *fast(struct match *m, const char *start, const char *stop, sopno startst, sopno stopst);
-static const char *slow(struct match *m, const char *start, const char *stop, sopno startst, sopno stopst);
-static states step(struct re_guts *g, sopno start, sopno stop, states bef, wint_t ch, states aft);
-#define MAX_RECURSION 100
-#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 BADCHAR (BOL-6)
-/* When using wint_t, which is defined as unsigned int on BSD,
- as well as on Cygwin or Linux, the NONCHAR test is broken without
- the below cast. I'm wondering how this is supposed to work at all... */
-#define NONCHAR(c) ((int)(c) <= OUT)
-#ifdef REDEBUG
-static void print(struct match *m, const char *caption, states st, int ch, FILE *d);
-#endif
-#ifdef REDEBUG
-static void at(struct match *m, const char *title, const char *start, const char *stop, sopno startst, sopno stopst);
-#endif
-#ifdef REDEBUG
-static const 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&REG_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(struct re_guts *g, const char *string, \
- == size_t nmatch, regmatch_t pmatch[], int eflags);
- */
-static int /* 0 success, REG_NOMATCH failure */
-matcher(struct re_guts *g,
- const char *string,
- size_t nmatch,
- regmatch_t pmatch[],
- int eflags)
-{
- const char *endp;
- int i;
- struct match mv;
- struct match *m = &mv;
- const char *dp;
- const sopno gf = g->firststate+1; /* +1 for OEND */
- const sopno gl = g->laststate;
- const char *start;
- const char *stop;
- /* Boyer-Moore algorithms variables */
- const char *pp;
- int cj, mj;
- const char *mustfirst;
- const char *mustlast;
- int *matchjump;
- int *charjump;
-
- /* simplify the situation where possible */
- if (g->cflags&REG_NOSUB)
- nmatch = 0;
- if (eflags&REG_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) {
- if (g->charjump != NULL && g->matchjump != NULL) {
- mustfirst = g->must;
- mustlast = g->must + g->mlen - 1;
- charjump = g->charjump;
- matchjump = g->matchjump;
- pp = mustlast;
- for (dp = start+g->mlen-1; dp < stop;) {
- /* Fast skip non-matches */
- while (dp < stop && charjump[(int)*dp])
- dp += charjump[(int)*dp];
-
- if (dp >= stop)
- break;
-
- /* Greedy matcher */
- /* We depend on not being used for
- * for strings of length 1
- */
- while (*--dp == *--pp && pp != mustfirst);
-
- if (*dp == *pp)
- break;
-
- /* Jump to next possible match */
- mj = matchjump[pp - mustfirst];
- cj = charjump[(int)*dp];
- dp += (cj < mj ? mj : cj);
- pp = mustlast;
- }
- if (pp != mustfirst)
- return(REG_NOMATCH);
- } else {
- 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);
- ZAPSTATE(&m->mbs);
-
- /* Adjust start according to moffset, to speed things up */
-#ifndef MNAMES
- /* The code evaluating moffset doesn't seem to work right
- in the multibyte case. */
- if (g->moffset > -1)
- start = ((dp - g->moffset) < start) ? start : dp - g->moffset;
-#endif
- SP("mloop", m->st, *start);
-
- /* this loop does only one repetition except for backrefs */
- for (;;) {
- endp = fast(m, start, stop, gf, gl);
- if (endp == NULL) { /* a miss */
- if (m->pmatch != NULL)
- free((char *)m->pmatch);
- if (m->lastpos != NULL)
- free((char *)m->lastpos);
- 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 += XMBRTOWC(NULL, m->coldp,
- m->endp - m->coldp, &m->mbs, 0);
- }
- 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&REG_BACKR)) {
- NOTE("dissecting");
- dp = dissect(m, m->coldp, endp, gf, gl);
- } else {
- if (g->nplus > 0 && m->lastpos == NULL)
- m->lastpos = malloc((g->nplus+1) *
- sizeof(const 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, 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, 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");
- /* recycle starting later */
- start = m->coldp + XMBRTOWC(NULL, m->coldp,
- stop - m->coldp, &m->mbs, 0);
- 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 const char *dissect(struct match *m, const char *start, \
- == const char *stop, sopno startst, sopno stopst);
- */
-static const char * /* == stop (success) always */
-dissect(struct match *m,
- const char *start,
- const char *stop,
- sopno startst,
- sopno stopst)
-{
- int i;
- sopno ss; /* start sop of current subRE */
- sopno es; /* end sop of current subRE */
- const char *sp; /* start of string matched by it */
- const char *stp; /* string matched by it cannot pass here */
- const char *rest; /* start of rest of string */
- const char *tail; /* string unmatched by rest of RE */
- sopno ssub; /* start sop of subsubRE */
- sopno esub; /* end sop of subsubRE */
- const char *ssp; /* start of string matched by subsubRE */
- const char *sep; /* end of string matched by subsubRE */
- const char *oldssp; /* previous ssp */
- const 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 += XMBRTOWC(NULL, sp, stop - start, &m->mbs, 0);
- break;
- case OBOL:
- case OEOL:
- case OBOW:
- case OEOW:
- break;
- case OANY:
- case OANYOF:
- sp += XMBRTOWC(NULL, sp, stop - start, &m->mbs, 0);
- 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 const char *backref(struct match *m, const char *start, \
- == const char *stop, sopno startst, sopno stopst, sopno lev);
- */
-static const char * /* == stop (success) or NULL (failure) */
-backref(struct match *m,
- const char *start,
- const char *stop,
- sopno startst,
- sopno stopst,
- sopno lev, /* PLUS nesting level */
- int rec)
-{
- int i;
- sopno ss; /* start sop of current subRE */
- const char *sp; /* start of string matched by it */
- sopno ssub; /* start sop of subsubRE */
- sopno esub; /* end sop of subsubRE */
- const char *ssp; /* start of string matched by subsubRE */
- const char *dp;
- size_t len;
- int hard;
- sop s;
- regoff_t offsave;
- cset *cs;
- wint_t wc;
-
- 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)
- return(NULL);
- sp += XMBRTOWC(&wc, sp, stop - sp, &m->mbs, BADCHAR);
- if (wc != OPND(s))
- return(NULL);
- break;
- case OANY:
- if (sp == stop)
- return(NULL);
- sp += XMBRTOWC(&wc, sp, stop - sp, &m->mbs, BADCHAR);
- if (wc == BADCHAR)
- return (NULL);
- break;
- case OANYOF:
- if (sp == stop)
- return (NULL);
- cs = &m->g->sets[OPND(s)];
- sp += XMBRTOWC(&wc, sp, stop - sp, &m->mbs, BADCHAR);
- if (wc == BADCHAR || !CHIN(cs, wc))
- return(NULL);
- break;
- case OBOL:
- if ( (sp == m->beginp && !(m->eflags&REG_NOTBOL)) ||
- (sp < m->endp && *(sp-1) == '\n' &&
- (m->g->cflags&REG_NEWLINE)) )
- { /* yes */ }
- else
- return(NULL);
- break;
- case OEOL:
- if ( (sp == m->endp && !(m->eflags&REG_NOTEOL)) ||
- (sp < m->endp && *sp == '\n' &&
- (m->g->cflags&REG_NEWLINE)) )
- { /* yes */ }
- else
- return(NULL);
- break;
- case OBOW:
- if (( (sp == m->beginp && !(m->eflags&REG_NOTBOL)) ||
- (sp < m->endp && *(sp-1) == '\n' &&
- (m->g->cflags&REG_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&REG_NOTEOL)) ||
- (sp < m->endp && *sp == '\n' &&
- (m->g->cflags&REG_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;
- if (len == 0 && rec++ > MAX_RECURSION)
- return(NULL);
- 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, rec));
- break;
- case OQUEST_: /* to null or not */
- dp = backref(m, sp, stop, ss+1, stopst, lev, rec);
- if (dp != NULL)
- return(dp); /* not */
- return(backref(m, sp, stop, ss+OPND(s)+1, stopst, lev, rec));
- 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, rec));
- break;
- case O_PLUS:
- if (sp == m->lastpos[lev]) /* last pass matched null */
- return(backref(m, sp, stop, ss+1, stopst, lev-1, rec));
- /* try another pass */
- m->lastpos[lev] = sp;
- dp = backref(m, sp, stop, ss-OPND(s)+1, stopst, lev, rec);
- if (dp == NULL)
- return(backref(m, sp, stop, ss+1, stopst, lev-1, rec));
- 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, rec);
- 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, rec);
- 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, rec);
- 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 */
- return "shut up gcc";
-}
-
-/*
- - fast - step through the string at top speed
- == static const char *fast(struct match *m, const char *start, \
- == const char *stop, sopno startst, sopno stopst);
- */
-static const char * /* where tentative match ended, or NULL */
-fast( struct match *m,
- const char *start,
- const char *stop,
- sopno startst,
- sopno stopst)
-{
- states st = m->st;
- states fresh = m->fresh;
- states tmp = m->tmp;
- const char *p = start;
- wint_t c;
- wint_t lastc; /* previous c */
- wint_t flagch;
- int i;
- const char *coldp; /* last p after which no match was underway */
- size_t clen;
-
- CLEAR(st);
- SET1(st, startst);
- SP("fast", st, *p);
- st = step(m->g, startst, stopst, st, NOTHING, st);
- ASSIGN(fresh, st);
- SP("start", st, *p);
- coldp = NULL;
- if (start == m->beginp)
- c = OUT;
- else {
- /*
- * XXX Wrong if the previous character was multi-byte.
- * Newline never is (in encodings supported by FreeBSD),
- * so this only breaks the ISWORD tests below.
- */
- c = (uch)*(start - 1);
- }
- for (;;) {
- /* next character */
- lastc = c;
- if (p == m->endp) {
- clen = 0;
- c = OUT;
- } else
- clen = XMBRTOWC(&c, p, m->endp - p, &m->mbs, BADCHAR);
- 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&REG_NEWLINE) ||
- (lastc == OUT && !(m->eflags&REG_NOTBOL)) ) {
- flagch = BOL;
- i = m->g->nbol;
- }
- if ( (c == '\n' && m->g->cflags&REG_NEWLINE) ||
- (c == OUT && !(m->eflags&REG_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 || clen > stop - p)
- 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 += clen;
- }
-
- assert(coldp != NULL);
- m->coldp = coldp;
- if (ISSET(st, stopst))
- return(p+XMBRTOWC(NULL, p, stop - p, &m->mbs, 0));
- else
- return(NULL);
-}
-
-/*
- - slow - step through the string more deliberately
- == static const char *slow(struct match *m, const char *start, \
- == const char *stop, sopno startst, sopno stopst);
- */
-static const char * /* where it ended */
-slow( struct match *m,
- const char *start,
- const char *stop,
- sopno startst,
- sopno stopst)
-{
- states st = m->st;
- states empty = m->empty;
- states tmp = m->tmp;
- const char *p = start;
- wint_t c;
- wint_t lastc; /* previous c */
- wint_t flagch;
- int i;
- const char *matchp; /* last p at which a match ended */
- size_t clen;
-
- 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;
- if (start == m->beginp)
- c = OUT;
- else {
- /*
- * XXX Wrong if the previous character was multi-byte.
- * Newline never is (in encodings supported by FreeBSD),
- * so this only breaks the ISWORD tests below.
- */
- c = (uch)*(start - 1);
- }
- for (;;) {
- /* next character */
- lastc = c;
- if (p == m->endp) {
- c = OUT;
- clen = 0;
- } else
- clen = XMBRTOWC(&c, p, m->endp - p, &m->mbs, BADCHAR);
-
- /* is there an EOL and/or BOL between lastc and c? */
- flagch = '\0';
- i = 0;
- if ( (lastc == '\n' && m->g->cflags&REG_NEWLINE) ||
- (lastc == OUT && !(m->eflags&REG_NOTBOL)) ) {
- flagch = BOL;
- i = m->g->nbol;
- }
- if ( (c == '\n' && m->g->cflags&REG_NEWLINE) ||
- (c == OUT && !(m->eflags&REG_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 || clen > stop - p)
- 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 += clen;
- }
-
- return(matchp);
-}
-
-
-/*
- - step - map set of states reachable before char to set reachable after
- == 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 BADCHAR (BOL-6)
- == #define NONCHAR(c) ((c) <= OUT)
- */
-static states
-step(struct re_guts *g,
- sopno start, /* start state within strip */
- sopno stop, /* state after stop state within strip */
- states bef, /* states reachable before */
- wint_t ch, /* character or NONCHAR code */
- states aft) /* states already known reachable after */
-{
- cset *cs;
- sop s;
- sopno pc;
- onestate here; /* note, macros know this name */
- sopno look;
- 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 != OPND(s));
- if (ch == 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 + 1);
- }
- 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, const char *caption, states st, \
- == int ch, FILE *d);
- == #endif
- */
-static void
-print(struct match *m,
- const char *caption,
- states st,
- int ch,
- FILE *d)
-{
- struct re_guts *g = m->g;
- int i;
- int first = 1;
-
- if (!(m->eflags&REG_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, const char *title, const char *start, \
- == const char *stop, sopno startst, sopno stopst);
- == #endif
- */
-static void
-at( struct match *m,
- const char *title,
- const char *start,
- const char *stop,
- sopno startst,
- sopno stopst)
-{
- if (!(m->eflags&REG_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 const 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 const char * /* -> representation */
-pchar(int ch)
-{
- static char pbuf[10];
-
- if (isprint((uch)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