external/bsd/nvi/dist/regex/regfree.c

   1 /*      $NetBSD: regfree.c,v 1.5 2014/01/26 21:47:00 christos Exp $ */
   2 /*-
   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 of the University of Toronto.
   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. All advertising materials mentioning features or use of this software
  19  *    must display the following acknowledgement:
  20  *      This product includes software developed by the University of
  21  *      California, Berkeley and its contributors.
  22  * 4. Neither the name of the University nor the names of its contributors
  23  *    may be used to endorse or promote products derived from this software
  24  *    without specific prior written permission.
  25  *
  26  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  27  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  28  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  29  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  30  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  31  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  32  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  33  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  34  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  35  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  36  * SUCH DAMAGE.
  37  *
  38  *      @(#)regfree.c   8.2 (Berkeley) 3/16/94
  39  */
  40
  41 #include <sys/cdefs.h>
  42 #if 0
  43 #if defined(LIBC_SCCS) && !defined(lint)
  44 static char sccsid[] = "@(#)regfree.c   8.2 (Berkeley) 3/16/94";
  45 #endif /* LIBC_SCCS and not lint */
  46 #else
  47 __RCSID("$NetBSD: regfree.c,v 1.5 2014/01/26 21:47:00 christos Exp $");
  48 #endif
  49
  50 #include <sys/types.h>
  51 #include <stdio.h>
  52 #include <stdlib.h>
  53 #include <regex.h>
  54
  55 #include "utils.h"
  56 #include "regex2.h"
  57
  58 /*
  59  - regfree - free everything
  60  = extern void regfree(regex_t *);
  61  */
  62 void
  63 regfree(regex_t *preg)
  64 {
  65         struct re_guts *g;
  66
  67         if (preg->re_magic != MAGIC1)   /* oops */
  68                 return;                 /* nice to complain, but hard */
  69
  70         g = preg->re_g;
  71         if (g == NULL || g->magic != MAGIC2)    /* oops again */
  72                 return;
  73         preg->re_magic = 0;             /* mark it invalid */
  74         g->magic = 0;                   /* mark it invalid */
  75
  76         if (g->strip != NULL)
  77                 free((char *)g->strip);
  78         if (g->stripdata != NULL)
  79                 free((char *)g->stripdata);
  80         if (g->sets != NULL)
  81                 free((char *)g->sets);
  82         if (g->setbits != NULL)
  83                 free((char *)g->setbits);
  84         if (g->must != NULL)
  85                 free(g->must);
  86         free((char *)g);
  87 }