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Replace regular expression package with Henry Spencer's latest version

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(extracted from Tcl 8.4.1 release, as Henry still hasn't got round to
making it a separate library).  This solves a performance problem for
multibyte, as well as upgrading our regexp support to match recent Tcl
and nearly match recent Perl.
This commit is contained in:
Tom Lane
2003-02-05 17:41:33 +00:00
parent 32c3db0f86
commit 7bcc6d98fb
29 changed files with 10704 additions and 5215 deletions
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101
src/backend/regex/regfree.c
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@ -1,75 +1,54 @@
/*-
* Copyright (c) 1992, 1993, 1994 Henry Spencer.
* Copyright (c) 1992, 1993, 1994
* The Regents of the University of California. All rights reserved.
/*
* regfree - free an RE
*
* This code is derived from software contributed to Berkeley by
* Henry Spencer.
* Copyright (c) 1998, 1999 Henry Spencer. All rights reserved.
*
* Development of this software was funded, in part, by Cray Research Inc.,
* UUNET Communications Services Inc., Sun Microsystems Inc., and Scriptics
* Corporation, none of whom are responsible for the results. The author
* thanks all of them.
*
* Redistribution and use in source and binary forms -- with or without
* modification -- are permitted for any purpose, provided that
* redistributions in source form retain this entire copyright notice and
* indicate the origin and nature of any modifications.
*
* I'd appreciate being given credit for this package in the documentation
* of software which uses it, but that is not a requirement.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
* AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
* HENRY SPENCER BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
* $Header: /cvsroot/pgsql/src/backend/regex/regfree.c,v 1.16 2003/02/05 17:41:33 tgl Exp $
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)regfree.c 8.3 (Berkeley) 3/20/94
* You might think that this could be incorporated into regcomp.c, and
* that would be a reasonable idea... except that this is a generic
* function (with a generic name), applicable to all compiled REs
* regardless of the size of their characters, whereas the stuff in
* regcomp.c gets compiled once per character size.
*/
#include "postgres.h"
#include "regex/regguts.h"
#include "regex/regex.h"
#include "regex/utils.h"
#include "regex/regex2.h"
/*
* regfree - free everything
* pg_regfree - free an RE (generic function, punts to RE-specific function)
*
* Ignoring invocation with NULL is a convenience.
*/
void
pg_regfree(regex_t *preg)
pg_regfree(regex_t *re)
{
struct re_guts *g;
if (preg->re_magic != MAGIC1) /* oops */
return; /* nice to complain, but hard */
g = preg->re_g;
if (g == NULL || g->magic != MAGIC2) /* oops again */
if (re == NULL)
return;
preg->re_magic = 0; /* mark it invalid */
g->magic = 0; /* mark it invalid */
if (preg->patsave != NULL)
free((char *) preg->patsave);
if (g->strip != NULL)
free((char *) g->strip);
if (g->sets != NULL)
free((char *) g->sets);
if (g->setbits != NULL)
free((char *) g->setbits);
if (g->must != NULL)
free(g->must);
free((char *) g);
(*((struct fns *)re->re_fns)->free)(re);
}