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regfree.c revision 1.4 
      1 /*	$NetBSD: regfree.c,v 1.4 1995/02/27 13:29:56 cgd 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 #if defined(LIBC_SCCS) && !defined(lint)
     43 #if 0
     44 static char sccsid[] = "@(#)regfree.c	8.3 (Berkeley) 3/20/94";
     45 #else
     46 static char rcsid[] = "$NetBSD: regfree.c,v 1.4 1995/02/27 13:29:56 cgd Exp $";
     47 #endif
     48 #endif /* LIBC_SCCS and not lint */
     49 
     50 #include <sys/types.h>
     51 #include <stdio.h>
     52 #include <stdlib.h>
     53 #include <regex.h>
     54 
     55 #include "utils.h"
     56 #include "regex2.h"
     57 
     58 /*
     59  - regfree - free everything
     60  = extern void regfree(regex_t *);
     61  */
     62 void
     63 regfree(preg)
     64 regex_t *preg;
     65 {
     66 	register struct re_guts *g;
     67 
     68 	if (preg->re_magic != MAGIC1)	/* oops */
     69 		return;			/* nice to complain, but hard */
     70 
     71 	g = preg->re_g;
     72 	if (g == NULL || g->magic != MAGIC2)	/* oops again */
     73 		return;
     74 	preg->re_magic = 0;		/* mark it invalid */
     75 	g->magic = 0;			/* mark it invalid */
     76 
     77 	if (g->strip != NULL)
     78 		free((char *)g->strip);
     79 	if (g->sets != NULL)
     80 		free((char *)g->sets);
     81 	if (g->setbits != NULL)
     82 		free((char *)g->setbits);
     83 	if (g->must != NULL)
     84 		free(g->must);
     85 	free((char *)g);
     86 }
     87