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 * src/backend/regex/regfree.c
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 "regex/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 */
48void
49pg_regfree(regex_t *re)
50{
51 if (re == NULL)
52 return;
53 (*((struct fns *) re->re_fns)->free) (re);
54}
55