regfree.c revision 302408 
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 * 4. Neither the name of the University nor the names of its contributors
18 *    may be used to endorse or promote products derived from this software
19 *    without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 *
33 *	@(#)regfree.c	8.3 (Berkeley) 3/20/94
34 */
35
36#if defined(LIBC_SCCS) && !defined(lint)
37static char sccsid[] = "@(#)regfree.c	8.3 (Berkeley) 3/20/94";
38#endif /* LIBC_SCCS and not lint */
39#include <sys/cdefs.h>
40__FBSDID("$FreeBSD: stable/11/lib/libc/regex/regfree.c 170528 2007-06-11 03:05:54Z delphij $");
41
42#include <sys/types.h>
43#include <stdio.h>
44#include <stdlib.h>
45#include <limits.h>
46#include <regex.h>
47#include <wchar.h>
48#include <wctype.h>
49
50#include "utils.h"
51#include "regex2.h"
52
53/*
54 - regfree - free everything
55 = extern void regfree(regex_t *);
56 */
57void
58regfree(regex_t *preg)
59{
60	struct re_guts *g;
61	int i;
62
63	if (preg->re_magic != MAGIC1)	/* oops */
64		return;			/* nice to complain, but hard */
65
66	g = preg->re_g;
67	if (g == NULL || g->magic != MAGIC2)	/* oops again */
68		return;
69	preg->re_magic = 0;		/* mark it invalid */
70	g->magic = 0;			/* mark it invalid */
71
72	if (g->strip != NULL)
73		free((char *)g->strip);
74	if (g->sets != NULL) {
75		for (i = 0; i < g->ncsets; i++) {
76			free(g->sets[i].ranges);
77			free(g->sets[i].wides);
78			free(g->sets[i].types);
79		}
80		free((char *)g->sets);
81	}
82	if (g->must != NULL)
83		free(g->must);
84	if (g->charjump != NULL)
85		free(&g->charjump[CHAR_MIN]);
86	if (g->matchjump != NULL)
87		free(g->matchjump);
88	free((char *)g);
89}
90