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