regexec.c revision 3f54fd611f536639ec30dd53c48e5ec1897cc7d9
/***********************************************************************
* *
* This software is part of the ast package *
* Copyright (c) 1985-2012 AT&T Intellectual Property *
* and is licensed under the *
* Eclipse Public License, Version 1.0 *
* by AT&T Intellectual Property *
* *
* A copy of the License is available at *
* http://www.eclipse.org/org/documents/epl-v10.html *
* (with md5 checksum b35adb5213ca9657e911e9befb180842) *
* *
* Information and Software Systems Research *
* AT&T Research *
* Florham Park NJ *
* *
* Glenn Fowler <gsf@research.att.com> *
* David Korn <dgk@research.att.com> *
* Phong Vo <kpv@research.att.com> *
* *
***********************************************************************/
#pragma prototyped
/*
* posix regex executor
* single unsized-string interface
*/
#include "reglib.h"
/*
* standard wrapper for the sized-record interface
*/
int
regexec(const regex_t* p, const char* s, size_t nmatch, regmatch_t* match, regflags_t flags)
{
if (flags & REG_STARTEND)
{
int r;
int m = match->rm_so;
regmatch_t* e;
if (!(r = regnexec(p, s + m, match->rm_eo - m, nmatch, match, flags)) && m > 0)
for (e = match + nmatch; match < e; match++)
if (match->rm_so >= 0)
{
match->rm_so += m;
match->rm_eo += m;
}
return r;
}
return regnexec(p, s, s ? strlen(s) : 0, nmatch, match, flags);
}
/*
* 20120528: regoff_t changed from int to ssize_t
*/
#if defined(__EXPORT__)
#define extern __EXPORT__
#endif
#undef regexec
#if _map_libc
#define regexec _ast_regexec
#endif
extern int
regexec(const regex_t* p, const char* s, size_t nmatch, oldregmatch_t* oldmatch, regflags_t flags)
{
if (oldmatch)
{
regmatch_t* match;
size_t i;
int r;
if (!(match = oldof(0, regmatch_t, nmatch, 0)))
return -1;
if (!(r = regexec_20120528(p, s, nmatch, match, flags)))
for (i = 0; i < nmatch; i++)
{
oldmatch[i].rm_so = match[i].rm_so;
oldmatch[i].rm_eo = match[i].rm_eo;
}
free(match);
return r;
}
return regexec_20120528(p, s, 0, NiL, flags);
}