lib/Support/regfree.c

   1 /*-
   2  * This code is derived from OpenBSD's libc/regex, original license follows:
   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 #include <sys/types.h>
  39 #include <stdio.h>
  40 #include <stdlib.h>
  41 #include "regex_impl.h"
  42
  43 #include "regutils.h"
  44 #include "regex2.h"
  45
  46 /*
  47  - llvm_regfree - free everything
  48  */
  49 void
  50 llvm_regfree(llvm_regex_t *preg)
  51 {
  52         struct re_guts *g;
  53
  54         if (preg->re_magic != MAGIC1)   /* oops */
  55                 return;                 /* nice to complain, but hard */
  56
  57         g = preg->re_g;
  58         if (g == NULL || g->magic != MAGIC2)    /* oops again */
  59                 return;
  60         preg->re_magic = 0;             /* mark it invalid */
  61         g->magic = 0;                   /* mark it invalid */
  62
  63         if (g->strip != NULL)
  64                 free((char *)g->strip);
  65         if (g->sets != NULL)
  66                 free((char *)g->sets);
  67         if (g->setbits != NULL)
  68                 free((char *)g->setbits);
  69         if (g->must != NULL)
  70                 free(g->must);
  71         free((char *)g);
  72 }