regfree.c revision 1.18 
1/*	$NetBSD: regfree.c,v 1.18 2021/02/25 21:28:40 christos Exp $	*/
2
3/*-
4 * SPDX-License-Identifier: BSD-3-Clause
5 *
6 * Copyright (c) 1992, 1993, 1994 Henry Spencer.
7 * Copyright (c) 1992, 1993, 1994
8 *	The Regents of the University of California.  All rights reserved.
9 *
10 * This code is derived from software contributed to Berkeley by
11 * Henry Spencer.
12 *
13 * Redistribution and use in source and binary forms, with or without
14 * modification, are permitted provided that the following conditions
15 * are met:
16 * 1. Redistributions of source code must retain the above copyright
17 *    notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 *    notice, this list of conditions and the following disclaimer in the
20 *    documentation and/or other materials provided with the distribution.
21 * 3. 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#include <sys/cdefs.h>
41#if 0
42static char sccsid[] = "@(#)regfree.c	8.3 (Berkeley) 3/20/94";
43__FBSDID("$FreeBSD: head/lib/libc/regex/regfree.c 326025 2017-11-20 19:49:47Z pfg $");
44#endif
45__RCSID("$NetBSD: regfree.c,v 1.18 2021/02/25 21:28:40 christos Exp $");
46
47#include "namespace.h"
48#include <sys/types.h>
49#include <stdio.h>
50#include <stdlib.h>
51#include <limits.h>
52#include <regex.h>
53
54#ifdef __weak_alias
55__weak_alias(regfree,_regfree)
56#endif
57
58#include "utils.h"
59#include "regex2.h"
60
61/*
62 - regfree - free everything
63 = extern void regfree(regex_t *);
64 */
65void
66regfree(regex_t *preg)
67{
68	struct re_guts *g;
69	unsigned int i;
70
71	_DIAGASSERT(preg != NULL);
72
73	_DIAGASSERT(preg->re_magic == MAGIC1);
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		for (i = 0; i < g->ncsets; i++) {
87			free(g->sets[i].ranges);
88			free(g->sets[i].wides);
89			free(g->sets[i].types);
90		}
91		free(g->sets);
92	}
93	if (g->must != NULL)
94		free(g->must);
95	if (g->charjump != NULL)
96		free(&g->charjump[CHAR_MIN]);
97	if (g->matchjump != NULL)
98		free(g->matchjump);
99	free(g);
100}
101