2 * SPDX-License-Identifier: BSD-3-Clause
4 * Copyright (c) 1992 The Regents of the University of California.
7 * This code is derived from software contributed to Berkeley by
8 * James da Silva at the University of Maryland at College Park.
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 3. Neither the name of the University nor the names of its contributors
19 * may be used to endorse or promote products derived from this software
20 * without specific prior written permission.
22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35 #include <sys/cdefs.h>
36 __FBSDID("$FreeBSD$");
37 __SCCSID("@(#)regex.c 5.1 (Berkeley) 3/29/92");
40 * Compatibility routines that implement the old re_comp/re_exec interface in
41 * terms of the regcomp/regexec interface. It's possible that some programs
42 * rely on dark corners of re_comp/re_exec and won't work with this version,
43 * but most programs should be fine.
50 static regex_t re_regexp;
52 static char re_errstr[100];
55 re_comp(const char *s)
59 if (s == NULL || *s == '\0') {
61 return __DECONST(char *,
62 "no previous regular expression");
71 rc = regcomp(&re_regexp, s, REG_EXTENDED);
77 regerror(rc, &re_regexp, re_errstr, sizeof(re_errstr));
78 re_errstr[sizeof(re_errstr) - 1] = '\0';
83 re_exec(const char *s)
89 rc = regexec(&re_regexp, s, 0, NULL, 0);
90 return (rc == 0 ? 1 : 0);