src/regex/regfree.c

   1 /*
   2  * regfree - free an RE
   3  *
   4  * Copyright (c) 1998, 1999 Henry Spencer.  All rights reserved.
   5  *
   6  * Development of this software was funded, in part, by Cray Research Inc.,
   7  * UUNET Communications Services Inc., Sun Microsystems Inc., and Scriptics
   8  * Corporation, none of whom are responsible for the results.  The author
   9  * thanks all of them.
  10  *
  11  * Redistribution and use in source and binary forms -- with or without
  12  * modification -- are permitted for any purpose, provided that
  13  * redistributions in source form retain this entire copyright notice and
  14  * indicate the origin and nature of any modifications.
  15  *
  16  * I'd appreciate being given credit for this package in the documentation
  17  * of software which uses it, but that is not a requirement.
  18  *
  19  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
  20  * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
  21  * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL
  22  * HENRY SPENCER BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  23  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  24  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
  25  * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
  26  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
  27  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
  28  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  29  *
  30  *
  31  *
  32  * You might think that this could be incorporated into regcomp.c, and
  33  * that would be a reasonable idea... except that this is a generic
  34  * function (with a generic name), applicable to all compiled REs
  35  * regardless of the size of their characters, whereas the stuff in
  36  * regcomp.c gets compiled once per character size.
  37  */
  38
  39 #include "regguts.h"
  40
  41 /*
  42  - regfree - free an RE (generic function, punts to RE-specific function)
  43  *
  44  * Ignoring invocation with NULL is a convenience.
  45  */
  46 VOID
  47 regfree(re)
  48 regex_t *re;
  49 {
  50         if (re == NULL)
  51                 return;
  52         (*((struct fns *)re->re_fns)->free)(re);
  53 }