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