Home | History | Annotate | Line # | Download | only in regex
regfree.c revision 1.12 
      1 /*	$NetBSD: regfree.c,v 1.12 2000/01/22 22:19:17 mycroft Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 1992, 1993, 1994 Henry Spencer.
      5  * Copyright (c) 1992, 1993, 1994
      6  *	The Regents of the University of California.  All rights reserved.
      7  *
      8  * This code is derived from software contributed to Berkeley by
      9  * Henry Spencer.
     10  *
     11  * Redistribution and use in source and binary forms, with or without
     12  * modification, are permitted provided that the following conditions
     13  * are met:
     14  * 1. Redistributions of source code must retain the above copyright
     15  *    notice, this list of conditions and the following disclaimer.
     16  * 2. Redistributions in binary form must reproduce the above copyright
     17  *    notice, this list of conditions and the following disclaimer in the
     18  *    documentation and/or other materials provided with the distribution.
     19  * 3. All advertising materials mentioning features or use of this software
     20  *    must display the following acknowledgement:
     21  *	This product includes software developed by the University of
     22  *	California, Berkeley and its contributors.
     23  * 4. Neither the name of the University nor the names of its contributors
     24  *    may be used to endorse or promote products derived from this software
     25  *    without specific prior written permission.
     26  *
     27  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     28  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     29  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     30  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     31  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     32  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     33  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     34  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     35  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     36  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     37  * SUCH DAMAGE.
     38  *
     39  *	@(#)regfree.c	8.3 (Berkeley) 3/20/94
     40  */
     41 
     42 #include <sys/cdefs.h>
     43 #if defined(LIBC_SCCS) && !defined(lint)
     44 #if 0
     45 static char sccsid[] = "@(#)regfree.c	8.3 (Berkeley) 3/20/94";
     46 #else
     47 __RCSID("$NetBSD: regfree.c,v 1.12 2000/01/22 22:19:17 mycroft Exp $");
     48 #endif
     49 #endif /* LIBC_SCCS and not lint */
     50 
     51 #include "namespace.h"
     52 #include <sys/types.h>
     53 
     54 #include <assert.h>
     55 #include <regex.h>
     56 #include <stdio.h>
     57 #include <stdlib.h>
     58 
     59 #ifdef __weak_alias
     60 __weak_alias(regfree,_regfree)
     61 #endif
     62 
     63 #include "utils.h"
     64 #include "regex2.h"
     65 
     66 /*
     67  - regfree - free everything
     68  = extern void regfree(regex_t *);
     69  */
     70 void
     71 regfree(preg)
     72 regex_t *preg;
     73 {
     74 	struct re_guts *g;
     75 
     76 	_DIAGASSERT(preg != NULL);
     77 
     78 	_DIAGASSERT(preg->re_magic == MAGIC1);
     79 	if (preg->re_magic != MAGIC1)	/* oops */
     80 		return;			/* nice to complain, but hard */
     81 
     82 	g = preg->re_g;
     83 	if (g == NULL || g->magic != MAGIC2)	/* oops again */
     84 		return;
     85 	preg->re_magic = 0;		/* mark it invalid */
     86 	g->magic = 0;			/* mark it invalid */
     87 
     88 	if (g->strip != NULL)
     89 		free(g->strip);
     90 	if (g->sets != NULL)
     91 		free(g->sets);
     92 	if (g->setbits != NULL)
     93 		free(g->setbits);
     94 	if (g->must != NULL)
     95 		free(g->must);
     96 	free(g);
     97 }
     98