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This is James da Silva at the University of Maryland at College Park's

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regex.c code as picked up from the net.
This commit is contained in:
Rodney W. Grimes 1994-05-27 10:26:59 +00:00
parent 0d92fee747
commit e5c43ac55b
1 changed files with 92 additions and 0 deletions
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lib/libcompat/4.3/regex.c Normal file
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@ -0,0 +1,92 @@
/*-
* 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. 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.
*/
/*
* 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.
*/
#if defined(LIBC_SCCS) && !defined(lint)
static char sccsid[] = "@(#)regex.c 5.1 (Berkeley) 3/29/92";
#endif /* LIBC_SCCS and not lint */
#include <sys/types.h>
#include <stddef.h>
#include <regexp.h>
#include <string.h>
#include <stdlib.h>
static regexp *re_regexp;
static int re_goterr;
static char *re_errstr;
char *
re_comp(s)
char *s;
{
if (s == NULL)
return (NULL);
if (re_regexp)
free(re_regexp);
if (re_errstr)
free(re_errstr);
re_goterr = 0;
re_regexp = regcomp(s);
return (re_goterr ? re_errstr : NULL);
}
int
re_exec(s)
char *s;
{
int rc;
re_goterr = 0;
rc = regexec(re_regexp, s);
return (re_goterr ? -1 : rc);
}
void
regerror(s)
const char *s;
{
re_goterr = 1;
if (re_errstr)
free(re_errstr);
re_errstr = strdup(s);
}