1 /*-
2 * Copyright (c) 1992 The Regents of the University of California.
3 * All rights reserved.
4 *
5 * This code is derived from software contributed to Berkeley by
6 * James da Silva at the University of Maryland at College Park.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. Neither the name of the University nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 */
32
33 /*
34 * Compatibility routines that implement the old re_comp/re_exec interface in
35 * terms of the regcomp/regexec interface. It's possible that some programs
36 * rely on dark corners of re_comp/re_exec and won't work with this version,
37 * but most programs should be fine.
38 */
39
40 #include <sys/cdefs.h>
41 #if defined(LIBC_SCCS) && !defined(lint)
42 #if 0
43 static char sccsid[] = "from: @(#)regex.c 5.1 (Berkeley) 3/29/92";*/
44 #else
45 __RCSID("$NetBSD: regex.c,v 1.12 2003/08/07 16:44:16 agc Exp $");
46 #endif
47 #endif /* LIBC_SCCS and not lint */
48
49 #include <sys/types.h>
50 #include <stddef.h>
51 #ifdef __lint__
52 #define __compat_regerror __compat43_regerror
53 #endif
54 #include <assert.h>
55 #include <regexp.h>
56 #include <re_comp.h>
57 #include <string.h>
58 #include <stdlib.h>
59 #include <unistd.h>
60
61 static regexp *re_regexp;
62 static int re_goterr;
63 static char *re_errstr;
64
65 char *
re_comp(s)66 re_comp(s)
67 const char *s;
68 {
69 if (s == NULL || *s == '\0')
70 return (NULL);
71 if (re_regexp)
72 free(re_regexp);
73 if (re_errstr)
74 free(re_errstr);
75 re_goterr = 0;
76 re_regexp = regcomp(s);
77 return (re_goterr ? re_errstr : NULL);
78 }
79
80 int
re_exec(s)81 re_exec(s)
82 const char *s;
83 {
84 int rc;
85
86
87 re_goterr = 0;
88 rc = regexec(re_regexp, s);
89 return (re_goterr ? -1 : rc);
90 }
91
92 void
regerror(s)93 regerror(s)
94 const char *s;
95 {
96
97 _DIAGASSERT(s != NULL);
98
99 re_goterr = 1;
100 if (re_errstr)
101 free(re_errstr);
102 re_errstr = strdup(s);
103 }
104