regfree.c revision 1.5 
1/*	$NetBSD: regfree.c,v 1.5 1997/07/13 20:06:26 christos 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 1.5 1997/07/13 20:06:26 christos Exp $");
48#endif
49#endif /* LIBC_SCCS and not lint */
50
51#include <sys/types.h>
52#include <stdio.h>
53#include <stdlib.h>
54#include <regex.h>
55
56#include "utils.h"
57#include "regex2.h"
58
59/*
60 - regfree - free everything
61 = extern void regfree(regex_t *);
62 */
63void
64regfree(preg)
65regex_t *preg;
66{
67	register struct re_guts *g;
68
69	if (preg->re_magic != MAGIC1)	/* oops */
70		return;			/* nice to complain, but hard */
71
72	g = preg->re_g;
73	if (g == NULL || g->magic != MAGIC2)	/* oops again */
74		return;
75	preg->re_magic = 0;		/* mark it invalid */
76	g->magic = 0;			/* mark it invalid */
77
78	if (g->strip != NULL)
79		free((char *)g->strip);
80	if (g->sets != NULL)
81		free((char *)g->sets);
82	if (g->setbits != NULL)
83		free((char *)g->setbits);
84	if (g->must != NULL)
85		free(g->must);
86	free((char *)g);
87}
88