regfree.c revision 1.9 
1/*	$NetBSD: regfree.c,v 1.9 1998/12/08 13:49:46 drochner 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
45static char sccsid[] = "@(#)regfree.c	8.3 (Berkeley) 3/20/94";
46#else
47__RCSID("$NetBSD: regfree.c,v 1.9 1998/12/08 13:49:46 drochner 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 */
68void
69regfree(preg)
70regex_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(g->strip);
85	if (g->sets != NULL)
86		free(g->sets);
87	if (g->setbits != NULL)
88		free(g->setbits);
89	if (g->must != NULL)
90		free(g->must);
91	free(g);
92}
93