winsup/cygwin/regex/regfree.c

   1 /*-
   2  * SPDX-License-Identifier: BSD-3-Clause
   3  *
   4  * Copyright (c) 1992, 1993, 1994 Henry Spencer.
   5  * Copyright (c) 1992, 1993, 1994
   6  *      The Regents of the University of California.  All rights reserved.
   7  *
   8  * This code is derived from software contributed to Berkeley by
   9  * Henry Spencer.
  10  *
  11  * Redistribution and use in source and binary forms, with or without
  12  * modification, are permitted provided that the following conditions
  13  * are met:
  14  * 1. Redistributions of source code must retain the above copyright
  15  *    notice, this list of conditions and the following disclaimer.
  16  * 2. Redistributions in binary form must reproduce the above copyright
  17  *    notice, this list of conditions and the following disclaimer in the
  18  *    documentation and/or other materials provided with the distribution.
  19  * 3. Neither the name of the University nor the names of its contributors
  20  *    may be used to endorse or promote products derived from this software
  21  *    without specific prior written permission.
  22  *
  23  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  33  * SUCH DAMAGE.
  34  *
  35  *      @(#)regfree.c   8.3 (Berkeley) 3/20/94
  36  */
  37
  38 #if defined(LIBC_SCCS) && !defined(lint)
  39 static char sccsid[] = "@(#)regfree.c   8.3 (Berkeley) 3/20/94";
  40 #endif /* LIBC_SCCS and not lint */
  41 #include <sys/cdefs.h>
  42 __FBSDID("$FreeBSD$");
  43
  44 #include <sys/types.h>
  45 #include <stdio.h>
  46 #include <stdlib.h>
  47 #include <limits.h>
  48 #include <regex.h>
  49 #include <wchar.h>
  50 #include <wctype.h>
  51
  52 #include "utils.h"
  53 #include "regex2.h"
  54
  55 /*
  56  - regfree - free everything
  57  = extern void regfree(regex_t *);
  58  */
  59 void
  60 regfree(regex_t *preg)
  61 {
  62         struct re_guts *g;
  63         unsigned int i;
  64
  65         if (preg->re_magic != MAGIC1)   /* oops */
  66                 return;                 /* nice to complain, but hard */
  67
  68         g = preg->re_g;
  69         if (g == NULL || g->magic != MAGIC2)    /* oops again */
  70                 return;
  71         preg->re_magic = 0;             /* mark it invalid */
  72         g->magic = 0;                   /* mark it invalid */
  73
  74         if (g->strip != NULL)
  75                 free((char *)g->strip);
  76         if (g->sets != NULL) {
  77                 for (i = 0; i < g->ncsets; i++) {
  78                         free(g->sets[i].ranges);
  79                         free(g->sets[i].wides);
  80                         free(g->sets[i].types);
  81                 }
  82                 free((char *)g->sets);
  83         }
  84         if (g->must != NULL)
  85                 free(g->must);
  86         if (g->charjump != NULL)
  87                 free(&g->charjump[CHAR_MIN]);
  88         if (g->matchjump != NULL)
  89                 free(g->matchjump);
  90         free((char *)g);
  91 }