1 /***********************************************************************
2 * *
3 * This software is part of the ast package *
4 * Copyright (c) 1985-2012 AT&T Intellectual Property *
5 * and is licensed under the *
6 * Eclipse Public License, Version 1.0 *
7 * by AT&T Intellectual Property *
8 * *
9 * A copy of the License is available at *
10 * http://www.eclipse.org/org/documents/epl-v10.html *
11 * (with md5 checksum b35adb5213ca9657e911e9befb180842) *
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
56 /*
57 * 20120528: regoff_t changed from int to ssize_t
58 */
59
60 #if defined(__EXPORT__)
61 #define extern __EXPORT__
62 #endif
63
64 #undef regexec
65 #if _map_libc
66 #define regexec _ast_regexec
67 #endif
68
69 extern int
regexec(const regex_t * p,const char * s,size_t nmatch,oldregmatch_t * oldmatch,regflags_t flags)70 regexec(const regex_t* p, const char* s, size_t nmatch, oldregmatch_t* oldmatch, regflags_t flags)
71 {
72 if (oldmatch)
73 {
74 regmatch_t* match;
75 size_t i;
76 int r;
77
78 if (!(match = oldof(0, regmatch_t, nmatch, 0)))
79 return -1;
80 if (!(r = regexec_20120528(p, s, nmatch, match, flags)))
81 for (i = 0; i < nmatch; i++)
82 {
83 oldmatch[i].rm_so = match[i].rm_so;
84 oldmatch[i].rm_eo = match[i].rm_eo;
85 }
86 free(match);
87 return r;
88 }
89 return regexec_20120528(p, s, 0, NiL, flags);
90 }
91