usr/src/lib/libc/port/regex/regfree.c

   1 /*
   2  * Copyright 2010 Nexenta Systems, Inc.  All rights reserved.
   3  * Copyright (c) 1992, 1993, 1994 Henry Spencer.
   4  * Copyright (c) 1992, 1993, 1994
   5  *      The Regents of the University of California.  All rights reserved.
   6  *
   7  * This code is derived from software contributed to Berkeley by
   8  * Henry Spencer.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  * 3. Neither the name of the University nor the names of its contributors
  19  *    may be used to endorse or promote products derived from this software
  20  *    without specific prior written permission.
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  25  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  28  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  32  * SUCH DAMAGE.
  33  */
  34
  35 #include "lint.h"
  36 #include "file64.h"
  37 #include <sys/types.h>
  38 #include <stdio.h>
  39 #include <stdlib.h>
  40 #include <limits.h>
  41 #include <regex.h>
  42 #include <wchar.h>
  43 #include <wctype.h>
  44
  45 #include "utils.h"
  46 #include "regex2.h"
  47
  48 /*
  49  * regfree - free everything
  50  */
  51 void
  52 regfree(regex_t *preg)
  53 {
  54         struct re_guts *g;
  55         int i;
  56
  57
  58         if (preg->re_magic != MAGIC1)   /* oops */
  59                 return;                 /* nice to complain, but hard */
  60
  61         g = preg->re_g;
  62         if (g == NULL || g->magic != MAGIC2)    /* oops again */
  63                 return;
  64         preg->re_magic = 0;             /* mark it invalid */
  65         g->magic = 0;                   /* mark it invalid */
  66
  67         if (g->strip != NULL)
  68                 free((char *)g->strip);
  69         if (g->sets != NULL) {
  70                 for (i = 0; i < g->ncsets; i++) {
  71                         free(g->sets[i].ranges);
  72                         free(g->sets[i].wides);
  73                         free(g->sets[i].types);
  74                 }
  75                 free((char *)g->sets);
  76         }
  77         free(g->must);
  78         if (g->charjump != NULL)
  79                 free(&g->charjump[CHAR_MIN]);
  80         free(g->matchjump);
  81         free((char *)g);
  82 }