1/*	$NetBSD: regfree.c,v 1.19 2021/02/26 19:24:47 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#if HAVE_NBTOOL_CONFIG_H
41#include "nbtool_config.h"
42#endif
43
44#include <sys/cdefs.h>
45#if 0
46static char sccsid[] = "@(#)regfree.c	8.3 (Berkeley) 3/20/94";
47__FBSDID("$FreeBSD: head/lib/libc/regex/regfree.c 326025 2017-11-20 19:49:47Z pfg $");
48#endif
49__RCSID("$NetBSD: regfree.c,v 1.19 2021/02/26 19:24:47 christos Exp $");
50
51#include "namespace.h"
52#include <sys/types.h>
53#include <stdio.h>
54#include <stdlib.h>
55#include <limits.h>
56#include <regex.h>
57
58#ifdef __weak_alias
59__weak_alias(regfree,_regfree)
60#endif
61
62#include "utils.h"
63#include "regex2.h"
64
65/*
66 - regfree - free everything
67 = extern void regfree(regex_t *);
68 */
69void
70regfree(regex_t *preg)
71{
72	struct re_guts *g;
73	unsigned int i;
74
75	_DIAGASSERT(preg != NULL);
76
77	_DIAGASSERT(preg->re_magic == MAGIC1);
78	if (preg->re_magic != MAGIC1)	/* oops */
79		return;			/* nice to complain, but hard */
80
81	g = preg->re_g;
82	if (g == NULL || g->magic != MAGIC2)	/* oops again */
83		return;
84	preg->re_magic = 0;		/* mark it invalid */
85	g->magic = 0;			/* mark it invalid */
86
87	if (g->strip != NULL)
88		free(g->strip);
89	if (g->sets != NULL) {
90		for (i = 0; i < g->ncsets; i++) {
91			free(g->sets[i].ranges);
92			free(g->sets[i].wides);
93			free(g->sets[i].types);
94		}
95		free(g->sets);
96	}
97	if (g->must != NULL)
98		free(g->must);
99	if (g->charjump != NULL)
100		free(&g->charjump[CHAR_MIN]);
101	if (g->matchjump != NULL)
102		free(g->matchjump);
103	free(g);
104}
105