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authorcvs2svn <>2010-12-18 01:10:07 +0300
committercvs2svn <>2010-12-18 01:10:07 +0300
commit27ab486f12c627f6780cb59815f0a36fe69d1497 (patch)
tree1d25fbce04b6a00d7b7d8f8fd64fa4209b57f42f /winsup/cygwin/regex/regcomp.c
parentafeb58b9ae7d03780fd695beeb64203994252c71 (diff)
This commit was manufactured by cvs2svn to create tag 'newlib-1_19_0'.newlib-1_19_0
Sprout from master 2010-12-17 22:10:05 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-netware 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.h 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winsup/w32api/lib/ddk/hal.def winsup/w32api/lib/ddk/hid.def winsup/w32api/lib/ddk/hidparse.def winsup/w32api/lib/ddk/mcd.def winsup/w32api/lib/ddk/ndis.def winsup/w32api/lib/ddk/newdev.def winsup/w32api/lib/ddk/ntoskrnl.def winsup/w32api/lib/ddk/scsiport.def winsup/w32api/lib/ddk/tdi.def winsup/w32api/lib/ddk/usbcamd.def winsup/w32api/lib/ddk/usbcamd2.def winsup/w32api/lib/ddk/videoprt.def winsup/w32api/lib/ddk/win32k.def winsup/w32api/lib/devguid.c winsup/w32api/lib/dhcpcsvc.def winsup/w32api/lib/directx/Makefile.in winsup/w32api/lib/directx/d3d8.def winsup/w32api/lib/directx/d3d9.def winsup/w32api/lib/directx/d3dim.def winsup/w32api/lib/directx/d3drm.def winsup/w32api/lib/directx/d3dx8d.def winsup/w32api/lib/directx/d3dx9d.def winsup/w32api/lib/directx/d3dxof.def winsup/w32api/lib/directx/ddraw.def winsup/w32api/lib/directx/dinput.def winsup/w32api/lib/directx/dinput8.def winsup/w32api/lib/directx/dinput_joy.c winsup/w32api/lib/directx/dinput_joy2.c winsup/w32api/lib/directx/dinput_kbd.c winsup/w32api/lib/directx/dinput_mouse.c winsup/w32api/lib/directx/dinput_mouse2.c winsup/w32api/lib/directx/dinput_private.h winsup/w32api/lib/directx/dmoguids.c winsup/w32api/lib/directx/dplayx.def winsup/w32api/lib/directx/dpnaddr.def winsup/w32api/lib/directx/dpnet.def winsup/w32api/lib/directx/dpnlobby.def winsup/w32api/lib/directx/dpvoice.def winsup/w32api/lib/directx/dsetup.def winsup/w32api/lib/directx/dsound.def winsup/w32api/lib/directx/dxerr.c winsup/w32api/lib/directx/dxerr8.c winsup/w32api/lib/directx/dxerr8w.c winsup/w32api/lib/directx/dxerr9.c winsup/w32api/lib/directx/dxerr9w.c winsup/w32api/lib/directx/dxguid.c winsup/w32api/lib/directx/ksproxy.def winsup/w32api/lib/directx/ksuser.c winsup/w32api/lib/directx/ksuser.def winsup/w32api/lib/directx/msdmo.def winsup/w32api/lib/directx/strmiids.c winsup/w32api/lib/directx/test.c winsup/w32api/lib/dlcapi.def winsup/w32api/lib/dnsapi.def winsup/w32api/lib/docobj-uuid.c winsup/w32api/lib/exdisp-uuid.c winsup/w32api/lib/extras-uuid.c winsup/w32api/lib/faultrep.def winsup/w32api/lib/gdi32.def winsup/w32api/lib/gdiplus.c winsup/w32api/lib/gdiplus.def winsup/w32api/lib/glaux.def winsup/w32api/lib/glu32.def winsup/w32api/lib/hlguids-uuid.c winsup/w32api/lib/hlink-uuid.c winsup/w32api/lib/icmui.def winsup/w32api/lib/igmpagnt.def winsup/w32api/lib/imagehlp.def winsup/w32api/lib/imm32.def winsup/w32api/lib/iphlpapi.def winsup/w32api/lib/kernel32.def winsup/w32api/lib/largeint.c winsup/w32api/lib/lz32.def winsup/w32api/lib/mapi32.def winsup/w32api/lib/mfcuia32.def winsup/w32api/lib/mgmtapi.def winsup/w32api/lib/mlang-uuid.c winsup/w32api/lib/mpr.def winsup/w32api/lib/mprapi.def winsup/w32api/lib/mqrt.def winsup/w32api/lib/msacm32.def winsup/w32api/lib/mscms.def winsup/w32api/lib/mshtml-uuid.c winsup/w32api/lib/msimg32.def winsup/w32api/lib/msvcp60.def winsup/w32api/lib/msvfw32.def winsup/w32api/lib/mswsock.def winsup/w32api/lib/msxml-uuid.c winsup/w32api/lib/nddeapi.def winsup/w32api/lib/netapi32.def winsup/w32api/lib/ntdll.def winsup/w32api/lib/oaidl-uuid.c winsup/w32api/lib/objidl-uuid.c winsup/w32api/lib/objsafe-uuid.c winsup/w32api/lib/ocidl-uuid.c winsup/w32api/lib/odbc32.def winsup/w32api/lib/odbccp32.def winsup/w32api/lib/ole32.def winsup/w32api/lib/oleacc-uuid.c winsup/w32api/lib/oleacc.def winsup/w32api/lib/oleaut32.def winsup/w32api/lib/olecli32.def winsup/w32api/lib/olectlid-uuid.c winsup/w32api/lib/oledlg.def winsup/w32api/lib/oleidl-uuid.c winsup/w32api/lib/olepro32.def winsup/w32api/lib/olesvr32.def winsup/w32api/lib/opengl32.def winsup/w32api/lib/penwin32.def winsup/w32api/lib/pkpd32.def winsup/w32api/lib/power-uuid.c winsup/w32api/lib/powrprof.def winsup/w32api/lib/psapi.def winsup/w32api/lib/quartz.def winsup/w32api/lib/rapi.def winsup/w32api/lib/rasapi32.def winsup/w32api/lib/rasdlg.def winsup/w32api/lib/res.rc winsup/w32api/lib/rpcdce4.def winsup/w32api/lib/rpcns4.def winsup/w32api/lib/rpcrt4.def winsup/w32api/lib/rtm.def winsup/w32api/lib/rtutils.def winsup/w32api/lib/scrnsave.c winsup/w32api/lib/secur32.def winsup/w32api/lib/servprov-uuid.c winsup/w32api/lib/setupapi.def winsup/w32api/lib/shell32.c winsup/w32api/lib/shell32.def winsup/w32api/lib/shfolder.def winsup/w32api/lib/shlwapi.def winsup/w32api/lib/snmpapi.def winsup/w32api/lib/svrapi.def winsup/w32api/lib/tapi32.def winsup/w32api/lib/test.c winsup/w32api/lib/thunk32.def winsup/w32api/lib/unknwn-uuid.c winsup/w32api/lib/url.def winsup/w32api/lib/urlmon-uuid.c winsup/w32api/lib/user32.def winsup/w32api/lib/userenv.def winsup/w32api/lib/usp10.def winsup/w32api/lib/uxtheme.def winsup/w32api/lib/vdmdbg.def winsup/w32api/lib/version.def winsup/w32api/lib/vfw32.mri winsup/w32api/lib/win32spl.def winsup/w32api/lib/wininet.def winsup/w32api/lib/winmm.def winsup/w32api/lib/winspool.def winsup/w32api/lib/winstrm.def winsup/w32api/lib/wldap32.def winsup/w32api/lib/wow32.def winsup/w32api/lib/ws2_32.c winsup/w32api/lib/ws2_32.def winsup/w32api/lib/wsnmp32.def winsup/w32api/lib/wsock32.def winsup/w32api/lib/wst.def winsup/w32api/lib/wtsapi32.def
Diffstat (limited to 'winsup/cygwin/regex/regcomp.c')
-rw-r--r--winsup/cygwin/regex/regcomp.c1885
1 files changed, 0 insertions, 1885 deletions
diff --git a/winsup/cygwin/regex/regcomp.c b/winsup/cygwin/regex/regcomp.c
deleted file mode 100644
index 5aee63948..000000000
--- a/winsup/cygwin/regex/regcomp.c
+++ /dev/null
@@ -1,1885 +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.
- *
- * @(#)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 <sys/cdefs.h>
-__FBSDID("$FreeBSD: src/lib/libc/regex/regcomp.c,v 1.36 2007/06/11 03:05:54 delphij Exp $");
-
-#ifdef __CYGWIN__
-#include "winsup.h"
-#endif
-#include <sys/types.h>
-#include <stdio.h>
-#include <string.h>
-#include <ctype.h>
-#include <limits.h>
-#include <stdlib.h>
-#include <regex.h>
-#ifndef __CYGWIN__
-#include <runetype.h>
-#endif
-#include <wchar.h>
-#include <wctype.h>
-
-#ifndef __CYGWIN__
-#include "collate.h"
-#endif
-
-#include "utils.h"
-#include "regex2.h"
-
-#include "cname.h"
-
-#ifdef __CYGWIN__
-/* Don't pull in windows headers just for LCID. */
-typedef unsigned long LCID;
-/* These are defined in nlsfuncs.cc. */
-extern LCID collate_lcid;
-extern char collate_charset[];
-#endif
-
-/*
- * 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 === */
-#ifdef __CYGWIN__ /* Defined below `int stop'. Our gcc chokes on that. */
-static void p_ere(struct parse *p, int stop);
-#else
-static void p_ere(struct parse *p, wint_t stop);
-#endif
-static void p_ere_exp(struct parse *p);
-static void p_str(struct parse *p);
-#ifdef __CYGWIN__ /* Defined below `int end1/end2'. Our gcc chokes on that. */
-static void p_bre(struct parse *p, int end1, int end2);
-#else
-static void p_bre(struct parse *p, wint_t end1, wint_t end2);
-#endif
-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 wint_t p_b_symbol(struct parse *p);
-static wint_t p_b_coll_elem(struct parse *p, wint_t endc);
-static wint_t othercase(wint_t ch);
-static void bothcases(struct parse *p, wint_t ch);
-static void ordinary(struct parse *p, wint_t 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 void CHadd(struct parse *p, cset *cs, wint_t ch);
-static void CHaddrange(struct parse *p, cset *cs, wint_t min, wint_t max);
-static void CHaddtype(struct parse *p, cset *cs, wctype_t wct);
-static wint_t singleton(cset *cs);
-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 int altoffset(sop *scan, int offset);
-static void computejumps(struct parse *p, struct re_guts *g);
-static void computematchjumps(struct parse *p, struct re_guts *g);
-static sopno pluscount(struct parse *p, struct re_guts *g);
-static wint_t wgetnext(struct parse *p);
-static size_t xwcrtomb (char *s, wint_t wc, mbstate_t *ps);
-
-#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 WGETNEXT() wgetnext(p)
-#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 <assert.h>s have bugs too */
-#endif
-
-/* Macro used by computejump()/computematchjump() */
-#define MIN(a,b) ((a)<(b)?(a):(b))
-
-/*
- - 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(regex_t * __restrict preg,
- const char * __restrict pattern,
- int cflags)
-{
- struct parse pa;
- struct re_guts *g;
- struct parse *p = &pa;
- int i;
- size_t len;
-#ifdef REDEBUG
-# define GOODFLAGS(f) (f)
-#else
-# define GOODFLAGS(f) ((f)&~REG_DUMP)
-#endif
-
- cflags = GOODFLAGS(cflags);
- if ((cflags&REG_EXTENDED) && (cflags&REG_NOSPEC))
- return(REG_INVARG);
-
- if (cflags&REG_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));
- 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->sets = NULL;
- g->ncsets = 0;
- g->cflags = cflags;
- g->iflags = 0;
- g->nbol = 0;
- g->neol = 0;
- g->must = NULL;
- g->moffset = -1;
- g->charjump = NULL;
- g->matchjump = NULL;
- g->mlen = 0;
- g->nsub = 0;
- g->backrefs = 0;
-
- /* do it */
- EMIT(OEND, 0);
- g->firststate = THERE();
- if (cflags&REG_EXTENDED)
- p_ere(p, OUT);
- else if (cflags&REG_NOSPEC)
- p_str(p);
- else
- p_bre(p, OUT, OUT);
- EMIT(OEND, 0);
- g->laststate = THERE();
-
- /* tidy up loose ends and fill things in */
- stripsnug(p, g);
- findmust(p, g);
- /* only use Boyer-Moore algorithm if the pattern is bigger
- * than three characters
- */
- if(g->mlen > 3) {
- computejumps(p, g);
- computematchjumps(p, g);
- if(g->matchjump == NULL && g->charjump != NULL) {
- free(g->charjump);
- g->charjump = NULL;
- }
- }
- 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(struct parse *p, int stop);
- */
-static void
-p_ere(struct parse *p,
- int stop) /* character this ERE should end at */
-{
- char c;
- sopno prevback = 0;
- sopno prevfwd = 0;
- sopno conc;
- 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);
- (void)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(struct parse *p);
- */
-static void
-p_ere_exp(struct parse *p)
-{
- char c;
- wint_t wc;
- sopno pos;
- int count;
- int count2;
- sopno subno;
- int wascaret = 0;
-
- assert(MORE()); /* caller should have ensured this */
- c = GETNEXT();
-
- pos = HERE();
- switch (c) {
- case '(':
- (void)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);
- (void)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&REG_NEWLINE)
- nonnewline(p);
- else
- EMIT(OANY, 0);
- break;
- case '[':
- p_bracket(p);
- break;
- case '\\':
- (void)REQUIRE(MORE(), REG_EESCAPE);
- wc = WGETNEXT();
-#ifdef __CYGWIN__
- /* \< and \> are the GNU equivalents to [[:<:]] and [[:>:]] */
- switch (wc)
- {
- case L'<':
- EMIT(OBOW, 0);
- break;
- case L'>':
- EMIT(OEOW, 0);
- break;
- default:
- ordinary(p, wc);
- break;
- }
-#else
- ordinary(p, wc);
-#endif
- break;
- case '{': /* okay as ordinary except if digit follows */
- (void)REQUIRE(!MORE() || !isdigit((uch)PEEK()), REG_BADRPT);
- /* FALLTHROUGH */
- default:
- p->next--;
- wc = WGETNEXT();
- ordinary(p, wc);
- break;
- }
-
- if (!MORE())
- return;
- c = PEEK();
- /* we call { a repetition if followed by a digit */
- if (!( c == '*' || c == '+' || c == '?' ||
- (c == '{' && MORE2() && isdigit((uch)PEEK2())) ))
- return; /* no repetition, we're done */
- NEXT();
-
- (void)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((uch)PEEK())) {
- count2 = p_count(p);
- (void)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();
- (void)REQUIRE(MORE(), REG_EBRACE);
- SETERROR(REG_BADBR);
- }
- break;
- }
-
- if (!MORE())
- return;
- c = PEEK();
- if (!( c == '*' || c == '+' || c == '?' ||
- (c == '{' && MORE2() && isdigit((uch)PEEK2())) ) )
- return;
- SETERROR(REG_BADRPT);
-}
-
-/*
- - p_str - string (no metacharacters) "parser"
- == static void p_str(struct parse *p);
- */
-static void
-p_str(struct parse *p)
-{
- (void)REQUIRE(MORE(), REG_EMPTY);
- while (MORE())
- ordinary(p, WGETNEXT());
-}
-
-/*
- - p_bre - BRE parser top level, anchoring and concatenation
- == static void p_bre(struct parse *p, int end1, \
- == 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 amount of lookahead needed to avoid this kludge is excessive.
- */
-static void
-p_bre(struct parse *p,
- int end1, /* first terminating character */
- int end2) /* second terminating character */
-{
- sopno start = HERE();
- int first = 1; /* first subexpression? */
- 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++;
- }
-
- (void)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(struct parse *p, int starordinary);
- */
-static int /* was the simple RE an unbackslashed $? */
-p_simp_re(struct parse *p,
- int starordinary) /* is a leading * an ordinary character? */
-{
- int c;
- int count;
- int count2;
- sopno pos;
- int i;
- wint_t wc;
- sopno subno;
-# define BACKSL (1<<CHAR_BIT)
-
- pos = HERE(); /* repetion op, if any, covers from here */
-
- assert(MORE()); /* caller should have ensured this */
- c = GETNEXT();
- if (c == '\\') {
- (void)REQUIRE(MORE(), REG_EESCAPE);
- c = BACKSL | GETNEXT();
- }
- switch (c) {
- case '.':
- if (p->g->cflags&REG_NEWLINE)
- nonnewline(p);
- else
- EMIT(OANY, 0);
- break;
- case '[':
- p_bracket(p);
- break;
-#ifdef __CYGWIN__
- case BACKSL|'<':
- /* \< is the GNU equivalents to [[:<:]] */
- EMIT(OBOW, 0);
- break;
- case BACKSL|'>':
- /* \> is the GNU equivalents to [[:>:]] */
- EMIT(OEOW, 0);
- break;
-#endif
- 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);
- (void)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 '*':
- (void)REQUIRE(starordinary, REG_BADRPT);
- /* FALLTHROUGH */
- default:
- p->next--;
- wc = WGETNEXT();
- ordinary(p, wc);
- 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((uch)PEEK())) {
- count2 = p_count(p);
- (void)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();
- (void)REQUIRE(MORE(), REG_EBRACE);
- SETERROR(REG_BADBR);
- }
- } else if (c == '$') /* $ (but not \$) ends it */
- return(1);
-
- return(0);
-}
-
-/*
- - p_count - parse a repetition count
- == static int p_count(struct parse *p);
- */
-static int /* the value */
-p_count(struct parse *p)
-{
- int count = 0;
- int ndigits = 0;
-
- while (MORE() && isdigit((uch)PEEK()) && count <= DUPMAX) {
- count = count*10 + (GETNEXT() - '0');
- ndigits++;
- }
-
- (void)REQUIRE(ndigits > 0 && count <= DUPMAX, REG_BADBR);
- return(count);
-}
-
-/*
- - p_bracket - parse a bracketed character list
- == static void p_bracket(struct parse *p);
- */
-static void
-p_bracket(struct parse *p)
-{
- cset *cs;
- wint_t ch;
-
- /* 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 ((cs = allocset(p)) == NULL)
- return;
-
- if (p->g->cflags&REG_ICASE)
- cs->icase = 1;
- if (EAT('^'))
- cs->invert = 1;
- if (EAT(']'))
- CHadd(p, cs, ']');
- else if (EAT('-'))
- CHadd(p, cs, '-');
- while (MORE() && PEEK() != ']' && !SEETWO('-', ']'))
- p_b_term(p, cs);
- if (EAT('-'))
- CHadd(p, cs, '-');
- (void)MUSTEAT(']', REG_EBRACK);
-
- if (p->error != 0) /* don't mess things up further */
- return;
-
- if (cs->invert && p->g->cflags&REG_NEWLINE)
- cs->bmp['\n' >> 3] |= 1 << ('\n' & 7);
-
- if ((ch = singleton(cs)) != OUT /* optimize singleton sets */
- && cs->invert == 0) { /* But not in invert case. */
- ordinary(p, ch);
- freeset(p, cs);
- } else
- EMIT(OANYOF, (int)(cs - p->g->sets));
-}
-
-#ifdef __CYGWIN__
-/* This function is usually part of FreeBSD's libc. */
-int
-__collate_range_cmp(int c1, int c2)
-{
- char s1[2] = { c1, '\0' };
- char s2[2] = { c2, '\0' };
- return strcoll (s1, s2);
-}
-#endif
-
-/*
- - p_b_term - parse one term of a bracketed character list
- == static void p_b_term(struct parse *p, cset *cs);
- */
-static void
-p_b_term(struct parse *p, cset *cs)
-{
- char c;
- wint_t start, finish;
- wint_t 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();
- (void)REQUIRE(MORE(), REG_EBRACK);
- c = PEEK();
- (void)REQUIRE(c != '-' && c != ']', REG_ECTYPE);
- p_b_cclass(p, cs);
- (void)REQUIRE(MORE(), REG_EBRACK);
- (void)REQUIRE(EATTWO(':', ']'), REG_ECTYPE);
- break;
- case '=': /* equivalence class */
- NEXT2();
- (void)REQUIRE(MORE(), REG_EBRACK);
- c = PEEK();
- (void)REQUIRE(c != '-' && c != ']', REG_ECOLLATE);
- p_b_eclass(p, cs);
- (void)REQUIRE(MORE(), REG_EBRACK);
- (void)REQUIRE(EATTWO('=', ']'), REG_ECOLLATE);
- break;
- default: /* symbol, ordinary character, or range */
- start = p_b_symbol(p);
- if (SEE('-') && MORE2() && PEEK2() != ']') {
- /* range */
- NEXT();
- if (EAT('-'))
- finish = '-';
- else
- finish = p_b_symbol(p);
- } else if (SEE('-') && !MORE2()) {
- SETERROR(REG_EBRACK);
- return;
- } else
- finish = start;
- if (start == finish)
- CHadd(p, cs, start);
- else {
-#ifdef __CYGWIN__
- if (!collate_lcid) {
-#else
- if (__collate_load_error) {
-#endif
- (void)REQUIRE((uch)start <= (uch)finish, REG_ERANGE);
- CHaddrange(p, cs, start, finish);
- } else {
- (void)REQUIRE(__collate_range_cmp(start, finish) <= 0, REG_ERANGE);
- for (i = 0; i <= UCHAR_MAX; i++) {
- if ( __collate_range_cmp(start, i) <= 0
- && __collate_range_cmp(i, finish) <= 0
- )
- CHadd(p, cs, i);
- }
- }
- }
- break;
- }
-}
-
-/*
- - p_b_cclass - parse a character-class name and deal with it
- == static void p_b_cclass(struct parse *p, cset *cs);
- */
-static void
-p_b_cclass(struct parse *p, cset *cs)
-{
- char *sp = p->next;
- size_t len;
- wctype_t wct;
- char clname[16];
-
- while (MORE() && isalpha((uch)PEEK()))
- NEXT();
- len = p->next - sp;
- if (len >= sizeof(clname) - 1) {
- SETERROR(REG_ECTYPE);
- return;
- }
- memcpy(clname, sp, len);
- clname[len] = '\0';
- if ((wct = wctype(clname)) == 0) {
- SETERROR(REG_ECTYPE);
- return;
- }
- CHaddtype(p, cs, wct);
-}
-
-/*
- - p_b_eclass - parse an equivalence-class name and deal with it
- == static void p_b_eclass(struct parse *p, cset *cs);
- *
- * This implementation is incomplete. xxx
- */
-static void
-p_b_eclass(struct parse *p, cset *cs)
-{
- wint_t c;
-
- c = p_b_coll_elem(p, '=');
- CHadd(p, cs, c);
-}
-
-/*
- - p_b_symbol - parse a character or [..]ed multicharacter collating symbol
- == static char p_b_symbol(struct parse *p);
- */
-static wint_t /* value of symbol */
-p_b_symbol(struct parse *p)
-{
- wint_t value;
-
- (void)REQUIRE(MORE(), REG_EBRACK);
- if (!EATTWO('[', '.'))
- return(WGETNEXT());
-
- /* collating symbol */
- value = p_b_coll_elem(p, '.');
- (void)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(struct parse *p, int endc);
- */
-static wint_t /* value of collating element */
-p_b_coll_elem(struct parse *p,
- wint_t endc) /* name ended by endc,']' */
-{
- char *sp = p->next;
- struct cname *cp;
- int len;
- mbstate_t mbs;
- wchar_t wc;
- size_t clen;
-
- 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 */
- memset(&mbs, 0, sizeof(mbs));
- if ((clen = mbrtowc(&wc, sp, len, &mbs)) == len)
- return (wc); /* single character */
- else if (clen == (size_t)-1 || clen == (size_t)-2)
- SETERROR(REG_ILLSEQ);
- else
- SETERROR(REG_ECOLLATE); /* neither */
- return(0);
-}
-
-/*
- - othercase - return the case counterpart of an alphabetic
- == static char othercase(int ch);
- */
-static wint_t /* if no counterpart, return ch */
-othercase(wint_t ch)
-{
- assert(iswalpha(ch));
- if (iswupper(ch))
- return(towlower(ch));
- else if (iswlower(ch))
- return(towupper(ch));
- else /* peculiar, but could happen */
- return(ch);
-}
-
-/*
- - bothcases - emit a dualcase version of a two-case character
- == static void bothcases(struct parse *p, int ch);
- *
- * Boy, is this implementation ever a kludge...
- */
-static void
-bothcases(struct parse *p, wint_t ch)
-{
- char *oldnext = p->next;
- char *oldend = p->end;
- char bracket[3 + MB_LEN_MAX];
- size_t n;
- mbstate_t mbs;
-
- assert(othercase(ch) != ch); /* p_bracket() would recurse */
- p->next = bracket;
- memset(&mbs, 0, sizeof(mbs));
- n = xwcrtomb(bracket, ch, &mbs);
- assert(n != (size_t)-1);
- bracket[n] = ']';
- bracket[n + 1] = '\0';
- p->end = bracket+n+1;
- p_bracket(p);
- assert(p->next == p->end);
- p->next = oldnext;
- p->end = oldend;
-}
-
-/*
- - ordinary - emit an ordinary character
- == static void ordinary(struct parse *p, int ch);
- */
-static void
-ordinary(struct parse *p, wint_t ch)
-{
- cset *cs;
-
- if ((p->g->cflags&REG_ICASE) && iswalpha(ch) && othercase(ch) != ch)
- bothcases(p, ch);
- else if ((ch & OPDMASK) == ch)
- EMIT(OCHAR, ch);
- else {
- /*
- * Kludge: character is too big to fit into an OCHAR operand.
- * Emit a singleton set.
- */
- if ((cs = allocset(p)) == NULL)
- return;
- CHadd(p, cs, ch);
- EMIT(OANYOF, (int)(cs - p->g->sets));
- }
-}
-
-/*
- - nonnewline - emit REG_NEWLINE version of OANY
- == static void nonnewline(struct parse *p);
- *
- * Boy, is this implementation ever a kludge...
- */
-static void
-nonnewline(struct parse *p)
-{
- char *oldnext = p->next;
- 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(struct parse *p, sopno start, int from, int to);
- */
-static void
-repeat(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) */
-{
- 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)
- 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;
- }
-}
-
-/*
- - wgetnext - helper function for WGETNEXT() macro. Gets the next wide
- - character from the parse struct, signals a REG_ILLSEQ error if the
- - character can't be converted. Returns the number of bytes consumed.
- */
-static wint_t
-wgetnext(struct parse *p)
-{
- mbstate_t mbs;
- wchar_t wc;
- wint_t ret;
- size_t n;
-
- memset(&mbs, 0, sizeof(mbs));
- n = mbrtowc(&wc, p->next, p->end - p->next, &mbs);
- if (n == (size_t)-1 || n == (size_t)-2) {
- SETERROR(REG_ILLSEQ);
- return (0);
- }
- ret = wc;
- if (n == 0)
- n = 1;
- else if (sizeof (wchar_t) == 2 && wc >= 0xd800 && wc <= 0xdbff) {
- /* UTF-16 surrogate pair. Fetch second half and
- compute UTF-32 value */
- size_t n2 = mbrtowc(&wc, p->next + n,
- p->end - p->next - n, &mbs);
- if (n2 == 0 || n2 == (size_t)-1 || n2 == (size_t)-2) {
- SETERROR(REG_ILLSEQ);
- return (0);
- }
- ret = (((ret & 0x3ff) << 10) | (wc & 0x3ff))
- + 0x10000;
- n += n2;
- }
- p->next += n;
- return (ret);
-}
-
-static size_t
-xwcrtomb (char *s, wint_t wc, mbstate_t *ps)
-{
- if (sizeof (wchar_t) == 2 && wc >= 0x10000)
- {
- /* UTF-16 wcrtomb can't handle these values directly. The rest of the
- code isn't surrogate pair aware, so we handle this here. Convert
- value to UTF-16 surrogate and call wcsrtombs to convert the "string"
- to the correct multibyte representation, if any. */
- wchar_t ws[2];
- const wchar_t *wsp = ws;
-
- wc -= 0x10000;
- ws[0] = 0xd800 | (wc >> 10);
- ws[1] = 0xdc00 | (wc & 0x3ff);
- return wcsnrtombs (s, &wsp, 2, MB_CUR_MAX, ps);
- }
- return wcrtomb (s, wc, ps);
-}
-
-
-/*
- - seterr - set an error condition
- == static int seterr(struct parse *p, int e);
- */
-static int /* useless but makes type checking happy */
-seterr(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(struct parse *p);
- */
-static cset *
-allocset(struct parse *p)
-{
- cset *cs, *ncs;
-
- ncs = realloc(p->g->sets, (p->g->ncsets + 1) * sizeof(*ncs));
- if (ncs == NULL) {
- SETERROR(REG_ESPACE);
- return (NULL);
- }
- p->g->sets = ncs;
- cs = &p->g->sets[p->g->ncsets++];
- memset(cs, 0, sizeof(*cs));
-
- return(cs);
-}
-
-/*
- - freeset - free a now-unused set
- == static void freeset(struct parse *p, cset *cs);
- */
-static void
-freeset(struct parse *p, cset *cs)
-{
- cset *top = &p->g->sets[p->g->ncsets];
-
- free(cs->wides);
- free(cs->ranges);
- free(cs->types);
- memset(cs, 0, sizeof(*cs));
- if (cs == top-1) /* recover only the easy case */
- p->g->ncsets--;
-}
-
-/*
- - singleton - Determine whether a set contains only one character,
- - returning it if so, otherwise returning OUT.
- */
-static wint_t
-singleton(cset *cs)
-{
- wint_t i, s, n;
-
- for (i = n = 0; i < NC; i++)
- if (CHIN(cs, i)) {
- n++;
- s = i;
- }
- if (n == 1 && cs->nwides == 0)
- return (s);
- if (n == 0 && cs->nwides == 1 && cs->nranges == 0 && cs->ntypes == 0 &&
- cs->icase == 0)
- return (cs->wides[0]);
- /* Don't bother handling the other cases. */
- return (OUT);
-}
-
-/*
- - CHadd - add character to character set.
- */
-static void
-CHadd(struct parse *p, cset *cs, wint_t ch)
-{
- wint_t nch, *newwides;
- assert(ch >= 0);
- if (ch < NC)
- cs->bmp[ch >> 3] |= 1 << (ch & 7);
- else {
- newwides = realloc(cs->wides, (cs->nwides + 1) *
- sizeof(*cs->wides));
- if (newwides == NULL) {
- SETERROR(REG_ESPACE);
- return;
- }
- cs->wides = newwides;
- cs->wides[cs->nwides++] = ch;
- }
- if (cs->icase) {
- if ((nch = towlower(ch)) < NC)
- cs->bmp[nch >> 3] |= 1 << (nch & 7);
- if ((nch = towupper(ch)) < NC)
- cs->bmp[nch >> 3] |= 1 << (nch & 7);
- }
-}
-
-/*
- - CHaddrange - add all characters in the range [min,max] to a character set.
- */
-static void
-CHaddrange(struct parse *p, cset *cs, wint_t min, wint_t max)
-{
- crange *newranges;
-
- for (; min < NC && min <= max; min++)
- CHadd(p, cs, min);
- if (min >= max)
- return;
- newranges = realloc(cs->ranges, (cs->nranges + 1) *
- sizeof(*cs->ranges));
- if (newranges == NULL) {
- SETERROR(REG_ESPACE);
- return;
- }
- cs->ranges = newranges;
- cs->ranges[cs->nranges].min = min;
- cs->ranges[cs->nranges].min = max;
- cs->nranges++;
-}
-
-/*
- - CHaddtype - add all characters of a certain type to a character set.
- */
-static void
-CHaddtype(struct parse *p, cset *cs, wctype_t wct)
-{
- wint_t i;
- wctype_t *newtypes;
-
- for (i = 0; i < NC; i++)
- if (iswctype(i, wct))
- CHadd(p, cs, i);
- newtypes = realloc(cs->types, (cs->ntypes + 1) *
- sizeof(*cs->types));
- if (newtypes == NULL) {
- SETERROR(REG_ESPACE);
- return;
- }
- cs->types = newtypes;
- cs->types[cs->ntypes++] = wct;
-}
-
-/*
- - dupl - emit a duplicate of a bunch of sops
- == static sopno dupl(struct parse *p, sopno start, sopno finish);
- */
-static sopno /* start of duplicate */
-dupl(struct parse *p,
- sopno start, /* from here */
- sopno finish) /* to this less one */
-{
- sopno ret = HERE();
- 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(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(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<<OPSHIFT);
-
- /* deal with undersized strip */
- if (p->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(struct parse *p, sop op, size_t opnd, sopno pos);
- */
-static void
-doinsert(struct parse *p, sop op, size_t opnd, sopno pos)
-{
- sopno sn;
- sop s;
- 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(struct parse *p, sopno pos, sop value);
- */
-static void
-dofwd(struct parse *p, sopno pos, sop value)
-{
- /* avoid making error situations worse */
- if (p->error != 0)
- return;
-
- assert(value < 1<<OPSHIFT);
- p->strip[pos] = OP(p->strip[pos]) | value;
-}
-
-/*
- - enlarge - enlarge the strip
- == static void enlarge(struct parse *p, sopno size);
- */
-static void
-enlarge(struct parse *p, sopno size)
-{
- 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(struct parse *p, struct re_guts *g);
- */
-static void
-stripsnug(struct parse *p, 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(struct parse *p, 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(struct parse *p, struct re_guts *g)
-{
- sop *scan;
- sop *start;
- sop *newstart;
- sopno newlen;
- sop s;
- char *cp;
- int offset;
- char buf[MB_LEN_MAX];
- size_t clen;
- mbstate_t mbs;
-
- /* avoid making error situations worse */
- if (p->error != 0)
- return;
-
- /*
- * It's not generally safe to do a ``char'' substring search on
- * multibyte character strings, but it's safe for at least
- * UTF-8 (see RFC 3629).
- */
- if (MB_CUR_MAX > 1 &&
-#ifdef __CYGWIN__
- strcmp(__locale_charset (), "UTF-8") != 0)
-#else
- strcmp(_CurrentRuneLocale->__encoding, "UTF-8") != 0)
-#endif
- return;
-
- /* find the longest OCHAR sequence in strip */
- newlen = 0;
- offset = 0;
- g->moffset = 0;
- scan = g->strip + 1;
- do {
- s = *scan++;
- switch (OP(s)) {
- case OCHAR: /* sequence member */
- if (newlen == 0) { /* new sequence */
- memset(&mbs, 0, sizeof(mbs));
- newstart = scan - 1;
- }
- clen = xwcrtomb(buf, OPND(s), &mbs);
- if (clen == (size_t)-1)
- goto toohard;
- newlen += clen;
- break;
- case OPLUS_: /* things that don't break one */
- case OLPAREN:
- case ORPAREN:
- break;
- case OQUEST_: /* things that must be skipped */
- case OCH_:
- offset = altoffset(scan, offset);
- 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 */
- case OBOW: /* things that break a sequence */
- case OEOW:
- case OBOL:
- case OEOL:
- case O_QUEST:
- case O_CH:
- case OEND:
- if (newlen > g->mlen) { /* ends one */
- start = newstart;
- g->mlen = newlen;
- if (offset > -1) {
- g->moffset += offset;
- offset = newlen;
- } else
- g->moffset = offset;
- } else {
- if (offset > -1)
- offset += newlen;
- }
- newlen = 0;
- break;
- case OANY:
- if (newlen > g->mlen) { /* ends one */
- start = newstart;
- g->mlen = newlen;
- if (offset > -1) {
- g->moffset += offset;
- offset = newlen;
- } else
- g->moffset = offset;
- } else {
- if (offset > -1)
- offset += newlen;
- }
- if (offset > -1)
- offset++;
- newlen = 0;
- break;
- case OANYOF: /* may or may not invalidate offset */
- /* First, everything as OANY */
- if (newlen > g->mlen) { /* ends one */
- start = newstart;
- g->mlen = newlen;
- if (offset > -1) {
- g->moffset += offset;
- offset = newlen;
- } else
- g->moffset = offset;
- } else {
- if (offset > -1)
- offset += newlen;
- }
- if (offset > -1)
- offset++;
- newlen = 0;
- break;
- toohard:
- default:
- /* Anything here makes it impossible or too hard
- * to calculate the offset -- so we give up;
- * save the last known good offset, in case the
- * must sequence doesn't occur later.
- */
- if (newlen > g->mlen) { /* ends one */
- start = newstart;
- g->mlen = newlen;
- if (offset > -1)
- g->moffset += offset;
- else
- g->moffset = offset;
- }
- offset = -1;
- newlen = 0;
- break;
- }
- } while (OP(s) != OEND);
-
- if (g->mlen == 0) { /* there isn't one */
- g->moffset = -1;
- 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;
- g->moffset = -1;
- return;
- }
- cp = g->must;
- scan = start;
- memset(&mbs, 0, sizeof(mbs));
- while (cp < g->must + g->mlen) {
- while (OP(s = *scan++) != OCHAR)
- continue;
- clen = xwcrtomb(cp, OPND(s), &mbs);
- assert(clen != (size_t)-1);
- cp += clen;
- }
- assert(cp == g->must + g->mlen);
- *cp++ = '\0'; /* just on general principles */
-}
-
-/*
- - altoffset - choose biggest offset among multiple choices
- == static int altoffset(sop *scan, int offset);
- *
- * Compute, recursively if necessary, the largest offset among multiple
- * re paths.
- */
-static int
-altoffset(sop *scan, int offset)
-{
- int largest;
- int try;
- sop s;
-
- /* If we gave up already on offsets, return */
- if (offset == -1)
- return -1;
-
- largest = 0;
- try = 0;
- s = *scan++;
- while (OP(s) != O_QUEST && OP(s) != O_CH) {
- switch (OP(s)) {
- case OOR1:
- if (try > largest)
- largest = try;
- try = 0;
- break;
- case OQUEST_:
- case OCH_:
- try = altoffset(scan, try);
- if (try == -1)
- return -1;
- scan--;
- do {
- scan += OPND(s);
- s = *scan;
- if (OP(s) != O_QUEST && OP(s) != O_CH &&
- OP(s) != OOR2)
- return -1;
- } while (OP(s) != O_QUEST && OP(s) != O_CH);
- /* We must skip to the next position, or we'll
- * leave altoffset() too early.
- */
- scan++;
- break;
- case OANYOF:
- case OCHAR:
- case OANY:
- try++;
- case OBOW:
- case OEOW:
- case OLPAREN:
- case ORPAREN:
- case OOR2:
- break;
- default:
- try = -1;
- break;
- }
- if (try == -1)
- return -1;
- s = *scan++;
- }
-
- if (try > largest)
- largest = try;
-
- return largest+offset;
-}
-
-/*
- - computejumps - compute char jumps for BM scan
- == static void computejumps(struct parse *p, struct re_guts *g);
- *
- * This algorithm assumes g->must exists and is has size greater than
- * zero. It's based on the algorithm found on Computer Algorithms by
- * Sara Baase.
- *
- * A char jump is the number of characters one needs to jump based on
- * the value of the character from the text that was mismatched.
- */
-static void
-computejumps(struct parse *p, struct re_guts *g)
-{
- int ch;
- int mindex;
-
- /* Avoid making errors worse */
- if (p->error != 0)
- return;
-
- g->charjump = (int*) malloc((NC + 1) * sizeof(int));
- if (g->charjump == NULL) /* Not a fatal error */
- return;
- /* Adjust for signed chars, if necessary */
- g->charjump = &g->charjump[-(CHAR_MIN)];
-
- /* If the character does not exist in the pattern, the jump
- * is equal to the number of characters in the pattern.
- */
- for (ch = CHAR_MIN; ch < (CHAR_MAX + 1); ch++)
- g->charjump[ch] = g->mlen;
-
- /* If the character does exist, compute the jump that would
- * take us to the last character in the pattern equal to it
- * (notice that we match right to left, so that last character
- * is the first one that would be matched).
- */
- for (mindex = 0; mindex < g->mlen; mindex++)
- g->charjump[(int)g->must[mindex]] = g->mlen - mindex - 1;
-}
-
-/*
- - computematchjumps - compute match jumps for BM scan
- == static void computematchjumps(struct parse *p, struct re_guts *g);
- *
- * This algorithm assumes g->must exists and is has size greater than
- * zero. It's based on the algorithm found on Computer Algorithms by
- * Sara Baase.
- *
- * A match jump is the number of characters one needs to advance based
- * on the already-matched suffix.
- * Notice that all values here are minus (g->mlen-1), because of the way
- * the search algorithm works.
- */
-static void
-computematchjumps(struct parse *p, struct re_guts *g)
-{
- int mindex; /* General "must" iterator */
- int suffix; /* Keeps track of matching suffix */
- int ssuffix; /* Keeps track of suffixes' suffix */
- int* pmatches; /* pmatches[k] points to the next i
- * such that i+1...mlen is a substring
- * of k+1...k+mlen-i-1
- */
-
- /* Avoid making errors worse */
- if (p->error != 0)
- return;
-
- pmatches = (int*) malloc(g->mlen * sizeof(unsigned int));
- if (pmatches == NULL) {
- g->matchjump = NULL;
- return;
- }
-
- g->matchjump = (int*) malloc(g->mlen * sizeof(unsigned int));
- if (g->matchjump == NULL) /* Not a fatal error */
- return;
-
- /* Set maximum possible jump for each character in the pattern */
- for (mindex = 0; mindex < g->mlen; mindex++)
- g->matchjump[mindex] = 2*g->mlen - mindex - 1;
-
- /* Compute pmatches[] */
- for (mindex = g->mlen - 1, suffix = g->mlen; mindex >= 0;
- mindex--, suffix--) {
- pmatches[mindex] = suffix;
-
- /* If a mismatch is found, interrupting the substring,
- * compute the matchjump for that position. If no
- * mismatch is found, then a text substring mismatched
- * against the suffix will also mismatch against the
- * substring.
- */
- while (suffix < g->mlen
- && g->must[mindex] != g->must[suffix]) {
- g->matchjump[suffix] = MIN(g->matchjump[suffix],
- g->mlen - mindex - 1);
- suffix = pmatches[suffix];
- }
- }
-
- /* Compute the matchjump up to the last substring found to jump
- * to the beginning of the largest must pattern prefix matching
- * it's own suffix.
- */
- for (mindex = 0; mindex <= suffix; mindex++)
- g->matchjump[mindex] = MIN(g->matchjump[mindex],
- g->mlen + suffix - mindex);
-
- ssuffix = pmatches[suffix];
- while (suffix < g->mlen) {
- while (suffix <= ssuffix && suffix < g->mlen) {
- g->matchjump[suffix] = MIN(g->matchjump[suffix],
- g->mlen + ssuffix - suffix);
- suffix++;
- }
- if (suffix < g->mlen)
- ssuffix = pmatches[ssuffix];
- }
-
- free(pmatches);
-}
-
-/*
- - pluscount - count + nesting
- == static sopno pluscount(struct parse *p, struct re_guts *g);
- */
-static sopno /* nesting depth */
-pluscount(struct parse *p, struct re_guts *g)
-{
- sop *scan;
- sop s;
- sopno plusnest = 0;
- 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);
-}