1 /***********************************************************************
2 * *
3 * This software is part of the ast package *
4 * Copyright (c) 1985-2010 AT&T Intellectual Property *
5 * and is licensed under the *
6 * Common Public License, Version 1.0 *
7 * by AT&T Intellectual Property *
8 * *
9 * A copy of the License is available at *
10 * http://www.opensource.org/licenses/cpl1.0.txt *
11 * (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9) *
12 * *
13 * Information and Software Systems Research *
14 * AT&T Research *
15 * Florham Park NJ *
16 * *
17 * Glenn Fowler <gsf@research.att.com> *
18 * David Korn <dgk@research.att.com> *
19 * Phong Vo <kpv@research.att.com> *
20 * *
21 ***********************************************************************/
22 #pragma prototyped
23
24 /*
25 * posix regex executor
26 * single unsized-string interface
27 */
28
29 #include "reglib.h"
30
31 /*
32 * standard wrapper for the sized-record interface
33 */
34
35 int
regexec(const regex_t * p,const char * s,size_t nmatch,regmatch_t * match,regflags_t flags)36 regexec(const regex_t* p, const char* s, size_t nmatch, regmatch_t* match, regflags_t flags)
37 {
38 if (flags & REG_STARTEND)
39 {
40 int r;
41 int m = match->rm_so;
42 regmatch_t* e;
43
44 if (!(r = regnexec(p, s + m, match->rm_eo - m, nmatch, match, flags)) && m > 0)
45 for (e = match + nmatch; match < e; match++)
46 if (match->rm_so >= 0)
47 {
48 match->rm_so += m;
49 match->rm_eo += m;
50 }
51 return r;
52 }
53 return regnexec(p, s, s ? strlen(s) : 0, nmatch, match, flags);
54 }
55