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/*
* Changes by Gunnar Ritter, Freiburg i. Br., Germany, November 2002.
*
* Sccsid @(#)regexec.c 1.7 (gritter) 2/6/05
*/
/* UNIX(R) Regular Expresssion Library
*
* Note: Code is released under the GNU LGPL
*
* Copyright (C) 2001 Caldera International, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to:
* Free Software Foundation, Inc.
* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
/* #include "synonyms.h" */
#include "re.h"
/* #pragma weak regexec = _regexec */
int
regexec(const regex_t *ep, const char *s, size_t n, regmatch_t *mp, int flg)
{
Exec ex;
int ret;
ex.flags = flg | (ep->re_flags & (REG_NEWLINE|REG_ICASE|REG_AVOIDNULL));
ex.str = (const unsigned char *)s;
ex.match = mp;
ex.mb_cur_max = ep->re_mb_cur_max;
if ((ex.nmatch = n) != 0) /* impose limits from compile flags */
{
if (ep->re_flags & REG_NOSUB)
n = ex.nmatch = 0;
else if (ep->re_flags & REG_ONESUB)
ex.nmatch = 1;
else if (n > ep->re_nsub + 1)
ex.nmatch = ep->re_nsub + 1;
}
if (ep->re_flags & REG_DFA && ex.nmatch <= 1)
ret = libuxre_regdfaexec(ep->re_dfa, &ex);
else
ret = libuxre_regnfaexec(ep->re_nfa, &ex);
/*
* Fill unused part of mp[].
*/
if (ret != 0)
ex.nmatch = 0;
while (n > ex.nmatch)
{
n--;
mp[n].rm_so = -1;
mp[n].rm_eo = -1;
}
return ret;
}
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