lib/libc/regex/regfree.c

   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  * $FreeBSD: src/lib/libc/regex/regfree.c,v 1.8 2007/06/11 03:05:54 delphij Exp $
  35  * $DragonFly: src/lib/libc/regex/regfree.c,v 1.3 2004/02/06 22:36:50 joerg Exp $
  36  */
  37
  38 #include <sys/types.h>
  39 #include <stdio.h>
  40 #include <stdlib.h>
  41 #include <limits.h>
  42 #include <regex.h>
  43 #include <wchar.h>
  44 #include <wctype.h>
  45
  46 #include "utils.h"
  47 #include "regex2.h"
  48
  49 /*
  50  - regfree - free everything
  51  = extern void regfree(regex_t *);
  52  */
  53 void
  54 regfree(regex_t *preg)
  55 {
  56         struct re_guts *g;
  57         int i;
  58
  59         if (preg->re_magic != MAGIC1)   /* oops */
  60                 return;                 /* nice to complain, but hard */
  61
  62         g = preg->re_g;
  63         if (g == NULL || g->magic != MAGIC2)    /* oops again */
  64                 return;
  65         preg->re_magic = 0;             /* mark it invalid */
  66         g->magic = 0;                   /* mark it invalid */
  67
  68         if (g->strip != NULL)
  69                 free((char *)g->strip);
  70         if (g->sets != NULL) {
  71                 for (i = 0; i < g->ncsets; i++) {
  72                         free(g->sets[i].ranges);
  73                         free(g->sets[i].wides);
  74                         free(g->sets[i].types);
  75                 }
  76                 free((char *)g->sets);
  77         }
  78         if (g->must != NULL)
  79                 free(g->must);
  80         if (g->charjump != NULL)
  81                 free(&g->charjump[CHAR_MIN]);
  82         if (g->matchjump != NULL)
  83                 free(g->matchjump);
  84         free((char *)g);
  85 }