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  * $Header: /projects/cvsroot/pgsql-server/src/backend/regex/regfree.c,v 1.17 2003/08/04 00:43:21 momjian Exp $
  31  *
  32  *
  33  * You might think that this could be incorporated into regcomp.c, and
  34  * that would be a reasonable idea... except that this is a generic
  35  * function (with a generic name), applicable to all compiled REs
  36  * regardless of the size of their characters, whereas the stuff in
  37  * regcomp.c gets compiled once per character size.
  38  */
  39
  40 #include "regguts.h"
  41
  42
  43 /*
  44  * pg_regfree - free an RE (generic function, punts to RE-specific function)
  45  *
  46  * Ignoring invocation with NULL is a convenience.
  47  */
  48 void
  49 regfree(regex_t *re)
  50 { wx_regfree(re); }
  51 void
  52 wx_regfree(regex_t *re)
  53 {
  54         if (re == NULL)
  55                 return;
  56         (*((struct fns *) re->re_fns)->free) (re);
  57 }