regfree.c revision 1.17
1/* $NetBSD: regfree.c,v 1.17 2021/02/24 18:13:21 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 1.17 2021/02/24 18:13:21 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#include <wchar.h> 58#include <wctype.h> 59 60#include "utils.h" 61#include "regex2.h" 62 63/* 64 - regfree - free everything 65 = extern void regfree(regex_t *); 66 */ 67void 68regfree(regex_t *preg) 69{ 70 struct re_guts *g; 71 unsigned int i; 72 73 _DIAGASSERT(preg != NULL); 74 75 _DIAGASSERT(preg->re_magic == MAGIC1); 76 if (preg->re_magic != MAGIC1) /* oops */ 77 return; /* nice to complain, but hard */ 78 79 g = preg->re_g; 80 if (g == NULL || g->magic != MAGIC2) /* oops again */ 81 return; 82 preg->re_magic = 0; /* mark it invalid */ 83 g->magic = 0; /* mark it invalid */ 84 85 if (g->strip != NULL) 86 free(g->strip); 87 if (g->sets != NULL) { 88 for (i = 0; i < g->ncsets; i++) { 89 free(g->sets[i].ranges); 90 free(g->sets[i].wides); 91 free(g->sets[i].types); 92 } 93 free(g->sets); 94 } 95 if (g->must != NULL) 96 free(g->must); 97 if (g->charjump != NULL) 98 free(&g->charjump[CHAR_MIN]); 99 if (g->matchjump != NULL) 100 free(g->matchjump); 101 free(g); 102} 103