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regfree.c revision 1.7 
      1 /*	$NetBSD: regfree.c,v 1.7 1998/02/03 18:38:15 perry 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 1.7 1998/02/03 18:38:15 perry Exp $");
     48 #endif
     49 #endif /* LIBC_SCCS and not lint */
     50 
     51 #include "namespace.h"
     52 #include <sys/types.h>
     53 #include <stdio.h>
     54 #include <stdlib.h>
     55 #include <regex.h>
     56 
     57 #ifdef __weak_alias
     58 __weak_alias(regfree,_regfree);
     59 #endif
     60 
     61 #include "utils.h"
     62 #include "regex2.h"
     63 
     64 /*
     65  - regfree - free everything
     66  = extern void regfree(regex_t *);
     67  */
     68 void
     69 regfree(preg)
     70 regex_t *preg;
     71 {
     72 	struct re_guts *g;
     73 
     74 	if (preg->re_magic != MAGIC1)	/* oops */
     75 		return;			/* nice to complain, but hard */
     76 
     77 	g = preg->re_g;
     78 	if (g == NULL || g->magic != MAGIC2)	/* oops again */
     79 		return;
     80 	preg->re_magic = 0;		/* mark it invalid */
     81 	g->magic = 0;			/* mark it invalid */
     82 
     83 	if (g->strip != NULL)
     84 		free((char *)g->strip);
     85 	if (g->sets != NULL)
     86 		free((char *)g->sets);
     87 	if (g->setbits != NULL)
     88 		free((char *)g->setbits);
     89 	if (g->must != NULL)
     90 		free(g->must);
     91 	free((char *)g);
     92 }
     93