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Replace regular expression package with Henry Spencer's latest version
(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
@ -1,110 +1,165 @@
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/*-
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* Copyright (c) 1992 Henry Spencer.
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* Copyright (c) 1992, 1993
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* The Regents of the University of California. All rights reserved.
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#ifndef _REGEX_H_
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#define _REGEX_H_ /* never again */
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/*
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* regular expressions
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*
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* This code is derived from software contributed to Berkeley by
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* Henry Spencer of the University of Toronto.
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* Copyright (c) 1998, 1999 Henry Spencer. All rights reserved.
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*
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* Development of this software was funded, in part, by Cray Research Inc.,
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* UUNET Communications Services Inc., Sun Microsystems Inc., and Scriptics
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* Corporation, none of whom are responsible for the results. The author
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* thanks all of them.
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*
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* Redistribution and use in source and binary forms -- with or without
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* modification -- are permitted for any purpose, provided that
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* redistributions in source form retain this entire copyright notice and
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* indicate the origin and nature of any modifications.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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* I'd appreciate being given credit for this package in the documentation
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* of software which uses it, but that is not a requirement.
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*
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
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* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
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* AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
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* HENRY SPENCER BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)regex.h 8.2 (Berkeley) 1/3/94
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* $Id: regex.h,v 1.23 2003/02/05 17:41:32 tgl Exp $
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*/
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#ifndef _REGEX_H_
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#define _REGEX_H_
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#include <sys/types.h>
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/*
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* Add your own defines, if needed, here.
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*/
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#include "mb/pg_wchar.h"
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/* types */
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typedef off_t regoff_t;
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/*
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* interface types etc.
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*/
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typedef struct
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{
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int re_magic;
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size_t re_nsub; /* number of parenthesized subexpressions */
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const pg_wchar *re_endp; /* end pointer for REG_PEND */
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struct re_guts *re_g; /* none of your business :-) */
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pg_wchar *patsave; /* me too :-) */
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/*
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* regoff_t has to be large enough to hold either off_t or ssize_t,
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* and must be signed; it's only a guess that long is suitable.
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*/
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typedef long regoff_t;
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/*
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* other interface types
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*/
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/* the biggie, a compiled RE (or rather, a front end to same) */
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typedef struct {
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int re_magic; /* magic number */
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size_t re_nsub; /* number of subexpressions */
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long re_info; /* information about RE */
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# define REG_UBACKREF 000001
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# define REG_ULOOKAHEAD 000002
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# define REG_UBOUNDS 000004
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# define REG_UBRACES 000010
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# define REG_UBSALNUM 000020
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# define REG_UPBOTCH 000040
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# define REG_UBBS 000100
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# define REG_UNONPOSIX 000200
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# define REG_UUNSPEC 000400
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# define REG_UUNPORT 001000
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# define REG_ULOCALE 002000
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# define REG_UEMPTYMATCH 004000
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# define REG_UIMPOSSIBLE 010000
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# define REG_USHORTEST 020000
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int re_csize; /* sizeof(character) */
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char *re_endp; /* backward compatibility kludge */
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/* the rest is opaque pointers to hidden innards */
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char *re_guts; /* `char *' is more portable than `void *' */
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char *re_fns;
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} regex_t;
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typedef struct
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{
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regoff_t rm_so; /* start of match */
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regoff_t rm_eo; /* end of match */
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/* result reporting (may acquire more fields later) */
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typedef struct {
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regoff_t rm_so; /* start of substring */
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regoff_t rm_eo; /* end of substring */
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} regmatch_t;
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/* regcomp() flags */
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#define REG_BASIC 0000
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#define REG_EXTENDED 0001
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#define REG_ICASE 0002
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#define REG_NOSUB 0004
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#define REG_NEWLINE 0010
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#define REG_NOSPEC 0020
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#define REG_PEND 0040
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#define REG_DUMP 0200
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/* supplementary control and reporting */
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typedef struct {
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regmatch_t rm_extend; /* see REG_EXPECT */
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} rm_detail_t;
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/* regerror() flags */
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#define REG_NOMATCH 1
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#define REG_BADPAT 2
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#define REG_ECOLLATE 3
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#define REG_ECTYPE 4
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#define REG_EESCAPE 5
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#define REG_ESUBREG 6
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#define REG_EBRACK 7
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#define REG_EPAREN 8
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#define REG_EBRACE 9
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#define REG_BADBR 10
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#define REG_ERANGE 11
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#define REG_ESPACE 12
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#define REG_BADRPT 13
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#define REG_EMPTY 14
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#define REG_ASSERT 15
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#define REG_INVARG 16
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#define REG_ATOI 255 /* convert name to number (!) */
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#define REG_ITOA 0400 /* convert number to name (!) */
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/* regexec() flags */
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#define REG_NOTBOL 00001
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#define REG_NOTEOL 00002
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#define REG_STARTEND 00004
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#define REG_TRACE 00400 /* tracing of execution */
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#define REG_LARGE 01000 /* force large representation */
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#define REG_BACKR 02000 /* force use of backref code */
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extern int pg_regcomp(regex_t *preg, const char *pattern, int cflags);
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extern size_t pg_regerror(int errcode, const regex_t *preg,
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char *errbuf, size_t errbuf_size);
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extern int pg_regexec(const regex_t *preg, const char *string,
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size_t nmatch,
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regmatch_t *pmatch, int eflags);
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extern void pg_regfree(regex_t *preg);
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/*
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* regex compilation flags
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*/
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#define REG_BASIC 000000 /* BREs (convenience) */
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#define REG_EXTENDED 000001 /* EREs */
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#define REG_ADVF 000002 /* advanced features in EREs */
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#define REG_ADVANCED 000003 /* AREs (which are also EREs) */
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#define REG_QUOTE 000004 /* no special characters, none */
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#define REG_NOSPEC REG_QUOTE /* historical synonym */
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#define REG_ICASE 000010 /* ignore case */
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#define REG_NOSUB 000020 /* don't care about subexpressions */
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#define REG_EXPANDED 000040 /* expanded format, white space & comments */
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#define REG_NLSTOP 000100 /* \n doesn't match . or [^ ] */
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#define REG_NLANCH 000200 /* ^ matches after \n, $ before */
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#define REG_NEWLINE 000300 /* newlines are line terminators */
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#define REG_PEND 000400 /* ugh -- backward-compatibility hack */
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#define REG_EXPECT 001000 /* report details on partial/limited matches */
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#define REG_BOSONLY 002000 /* temporary kludge for BOS-only matches */
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#define REG_DUMP 004000 /* none of your business :-) */
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#define REG_FAKE 010000 /* none of your business :-) */
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#define REG_PROGRESS 020000 /* none of your business :-) */
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#endif /* !_REGEX_H_ */
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/*
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* regex execution flags
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*/
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#define REG_NOTBOL 0001 /* BOS is not BOL */
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#define REG_NOTEOL 0002 /* EOS is not EOL */
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#define REG_STARTEND 0004 /* backward compatibility kludge */
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#define REG_FTRACE 0010 /* none of your business */
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#define REG_MTRACE 0020 /* none of your business */
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#define REG_SMALL 0040 /* none of your business */
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/*
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* error reporting
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* Be careful if modifying the list of error codes -- the table used by
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* regerror() is generated automatically from this file!
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*/
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#define REG_OKAY 0 /* no errors detected */
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#define REG_NOMATCH 1 /* failed to match */
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#define REG_BADPAT 2 /* invalid regexp */
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#define REG_ECOLLATE 3 /* invalid collating element */
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#define REG_ECTYPE 4 /* invalid character class */
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#define REG_EESCAPE 5 /* invalid escape \ sequence */
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#define REG_ESUBREG 6 /* invalid backreference number */
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#define REG_EBRACK 7 /* brackets [] not balanced */
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#define REG_EPAREN 8 /* parentheses () not balanced */
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#define REG_EBRACE 9 /* braces {} not balanced */
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#define REG_BADBR 10 /* invalid repetition count(s) */
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#define REG_ERANGE 11 /* invalid character range */
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#define REG_ESPACE 12 /* out of memory */
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#define REG_BADRPT 13 /* quantifier operand invalid */
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#define REG_ASSERT 15 /* "can't happen" -- you found a bug */
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#define REG_INVARG 16 /* invalid argument to regex function */
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#define REG_MIXED 17 /* character widths of regex and string differ */
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#define REG_BADOPT 18 /* invalid embedded option */
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/* two specials for debugging and testing */
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#define REG_ATOI 101 /* convert error-code name to number */
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#define REG_ITOA 102 /* convert error-code number to name */
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/*
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* the prototypes for exported functions
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*/
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extern int pg_regcomp(regex_t *, const pg_wchar *, size_t, int);
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extern int pg_regexec(regex_t *, const pg_wchar *, size_t, rm_detail_t *, size_t, regmatch_t [], int);
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extern void pg_regfree(regex_t *);
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extern size_t pg_regerror(int, const regex_t *, char *, size_t);
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#endif /* _REGEX_H_ */
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