regexec.c revision da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968
/***********************************************************************
* *
* This software is part of the ast package *
* Copyright (c) 1985-2007 AT&T Knowledge Ventures *
* and is licensed under the *
* Common Public License, Version 1.0 *
* by AT&T Knowledge Ventures *
* *
* A copy of the License is available at *
* http://www.opensource.org/licenses/cpl1.0.txt *
* (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9) *
* *
* 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);
}