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
43static char sccsid[] = "from: @(#)regex.c	5.1 (Berkeley) 3/29/92";*/
44#else
45__RCSID("$NetBSD: regex.c,v 1.11 1999/09/20 04:48:03 lukem 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
61static regexp *re_regexp;
62static int re_goterr;
63static char *re_errstr;
64
65char *
66re_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
80int
81re_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
92void
93regerror(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