Home | History | Annotate | Line # | Download | only in 4.3 
      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 *
     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
     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
     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