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
46 static 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
__weak_alias(regfree,_regfree)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 */
69 void
70 regfree(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