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regfree.c
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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  */
48 void
50 {
51  if (re == NULL)
52  return;
53  (*((struct fns *) re->re_fns)->free) (re);
54 }
char * re_fns
Definition: regex.h:79
Definition: regguts.h:445
#define NULL
Definition: c.h:229
void pg_regfree(regex_t *re)
Definition: regfree.c:49
Definition: regex.h:55