regfree.c revision 1573 
1/*-
2 * Copyright (c) 1992, 1993, 1994 Henry Spencer.
3 * Copyright (c) 1992, 1993, 1994
4 *	The Regents of the University of California.  All rights reserved.
5 *
6 * This code is derived from software contributed to Berkeley by
7 * Henry Spencer.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 *    notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 *    notice, this list of conditions and the following disclaimer in the
16 *    documentation and/or other materials provided with the distribution.
17 * 3. All advertising materials mentioning features or use of this software
18 *    must display the following acknowledgement:
19 *	This product includes software developed by the University of
20 *	California, Berkeley and its contributors.
21 * 4. Neither the name of the University nor the names of its contributors
22 *    may be used to endorse or promote products derived from this software
23 *    without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
28 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35 * SUCH DAMAGE.
36 *
37 *	@(#)regfree.c	8.3 (Berkeley) 3/20/94
38 */
39
40#if defined(LIBC_SCCS) && !defined(lint)
41static char sccsid[] = "@(#)regfree.c	8.3 (Berkeley) 3/20/94";
42#endif /* LIBC_SCCS and not lint */
43
44#include <sys/types.h>
45#include <stdio.h>
46#include <stdlib.h>
47#include <regex.h>
48
49#include "utils.h"
50#include "regex2.h"
51
52/*
53 - regfree - free everything
54 = extern void regfree(regex_t *);
55 */
56void
57regfree(preg)
58regex_t *preg;
59{
60	register struct re_guts *g;
61
62	if (preg->re_magic != MAGIC1)	/* oops */
63		return;			/* nice to complain, but hard */
64
65	g = preg->re_g;
66	if (g == NULL || g->magic != MAGIC2)	/* oops again */
67		return;
68	preg->re_magic = 0;		/* mark it invalid */
69	g->magic = 0;			/* mark it invalid */
70
71	if (g->strip != NULL)
72		free((char *)g->strip);
73	if (g->sets != NULL)
74		free((char *)g->sets);
75	if (g->setbits != NULL)
76		free((char *)g->setbits);
77	if (g->must != NULL)
78		free(g->must);
79	free((char *)g);
80}
81