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Upgraded from libpcre 4.3 to 6.3 - not tested on Windows yet
This commit is contained in:
fyodor
@@ -2,103 +2,108 @@
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* Perl-Compatible Regular Expressions *
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*************************************************/
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/*
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This is a library of functions to support regular expressions whose syntax
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and semantics are as close as possible to those of the Perl 5 language. See
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the file Tech.Notes for some information on the internals.
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/* PCRE is a library of functions to support regular expressions whose syntax
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and semantics are as close as possible to those of the Perl 5 language.
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This module is a wrapper that provides a POSIX API to the underlying PCRE
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functions.
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Written by: Philip Hazel <ph10@cam.ac.uk>
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Copyright (c) 1997-2003 University of Cambridge
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Written by Philip Hazel
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Copyright (c) 1997-2005 University of Cambridge
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-----------------------------------------------------------------------------
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Permission is granted to anyone to use this software for any purpose on any
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computer system, and to redistribute it freely, subject to the following
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restrictions:
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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 are met:
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1. This software is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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* Redistributions of source code must retain the above copyright notice,
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this list of conditions and the following disclaimer.
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2. The origin of this software must not be misrepresented, either by
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explicit claim or by omission.
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* 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. Altered versions must be plainly marked as such, and must not be
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misrepresented as being the original software.
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* Neither the name of the University of Cambridge nor the names of its
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contributors may be used to endorse or promote products derived from
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this software without specific prior written permission.
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4. If PCRE is embedded in any software that is released under the GNU
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General Purpose Licence (GPL), then the terms of that licence shall
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supersede any condition above with which it is incompatible.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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AND 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 COPYRIGHT OWNER OR CONTRIBUTORS BE
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LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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POSSIBILITY OF SUCH DAMAGE.
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-----------------------------------------------------------------------------
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*/
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#include "internal.h"
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/* This module is a wrapper that provides a POSIX API to the underlying PCRE
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functions. */
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#include "pcre_internal.h"
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#include "pcreposix.h"
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#include "stdlib.h"
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/* Corresponding tables of PCRE error messages and POSIX error codes. */
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/* Table to translate PCRE compile time error codes into POSIX error codes. */
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static const char *estring[] = {
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ERR1, ERR2, ERR3, ERR4, ERR5, ERR6, ERR7, ERR8, ERR9, ERR10,
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ERR11, ERR12, ERR13, ERR14, ERR15, ERR16, ERR17, ERR18, ERR19, ERR20,
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ERR21, ERR22, ERR23, ERR24, ERR25, ERR26, ERR27, ERR29, ERR29, ERR30,
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ERR31, ERR32, ERR33, ERR34, ERR35, ERR36, ERR37, ERR38, ERR39, ERR40,
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ERR41, ERR42, ERR43 };
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static int eint[] = {
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REG_EESCAPE, /* "\\ at end of pattern" */
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REG_EESCAPE, /* "\\c at end of pattern" */
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REG_EESCAPE, /* "unrecognized character follows \\" */
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REG_BADBR, /* "numbers out of order in {} quantifier" */
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REG_BADBR, /* "number too big in {} quantifier" */
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REG_EBRACK, /* "missing terminating ] for character class" */
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REG_ECTYPE, /* "invalid escape sequence in character class" */
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REG_ERANGE, /* "range out of order in character class" */
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REG_BADRPT, /* "nothing to repeat" */
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REG_BADRPT, /* "operand of unlimited repeat could match the empty string" */
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REG_ASSERT, /* "internal error: unexpected repeat" */
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REG_BADPAT, /* "unrecognized character after (?" */
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REG_BADPAT, /* "POSIX named classes are supported only within a class" */
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REG_EPAREN, /* "missing )" */
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REG_ESUBREG, /* "reference to non-existent subpattern" */
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REG_INVARG, /* "erroffset passed as NULL" */
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REG_INVARG, /* "unknown option bit(s) set" */
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REG_EPAREN, /* "missing ) after comment" */
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REG_ESIZE, /* "parentheses nested too deeply" */
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REG_ESIZE, /* "regular expression too large" */
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REG_ESPACE, /* "failed to get memory" */
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REG_EPAREN, /* "unmatched brackets" */
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REG_ASSERT, /* "internal error: code overflow" */
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REG_BADPAT, /* "unrecognized character after (?<" */
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REG_BADPAT, /* "lookbehind assertion is not fixed length" */
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REG_BADPAT, /* "malformed number after (?(" */
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REG_BADPAT, /* "conditional group containe more than two branches" */
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REG_BADPAT, /* "assertion expected after (?(" */
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REG_BADPAT, /* "(?R or (?digits must be followed by )" */
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REG_ECTYPE, /* "unknown POSIX class name" */
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REG_BADPAT, /* "POSIX collating elements are not supported" */
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REG_INVARG, /* "this version of PCRE is not compiled with PCRE_UTF8 support" */
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REG_BADPAT, /* "spare error" */
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REG_BADPAT, /* "character value in \x{...} sequence is too large" */
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REG_BADPAT, /* "invalid condition (?(0)" */
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REG_BADPAT, /* "\\C not allowed in lookbehind assertion" */
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REG_EESCAPE, /* "PCRE does not support \\L, \\l, \\N, \\P, \\p, \\U, \\u, or \\X" */
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REG_BADPAT, /* "number after (?C is > 255" */
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REG_BADPAT, /* "closing ) for (?C expected" */
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REG_BADPAT, /* "recursive call could loop indefinitely" */
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REG_BADPAT, /* "unrecognized character after (?P" */
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REG_BADPAT, /* "syntax error after (?P" */
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REG_BADPAT /* "two named groups have the same name" */
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static const int eint[] = {
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0, /* no error */
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REG_EESCAPE, /* \ at end of pattern */
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REG_EESCAPE, /* \c at end of pattern */
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REG_EESCAPE, /* unrecognized character follows \ */
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REG_BADBR, /* numbers out of order in {} quantifier */
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REG_BADBR, /* number too big in {} quantifier */
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REG_EBRACK, /* missing terminating ] for character class */
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REG_ECTYPE, /* invalid escape sequence in character class */
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REG_ERANGE, /* range out of order in character class */
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REG_BADRPT, /* nothing to repeat */
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REG_BADRPT, /* operand of unlimited repeat could match the empty string */
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REG_ASSERT, /* internal error: unexpected repeat */
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REG_BADPAT, /* unrecognized character after (? */
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REG_BADPAT, /* POSIX named classes are supported only within a class */
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REG_EPAREN, /* missing ) */
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REG_ESUBREG, /* reference to non-existent subpattern */
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REG_INVARG, /* erroffset passed as NULL */
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REG_INVARG, /* unknown option bit(s) set */
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REG_EPAREN, /* missing ) after comment */
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REG_ESIZE, /* parentheses nested too deeply */
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REG_ESIZE, /* regular expression too large */
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REG_ESPACE, /* failed to get memory */
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REG_EPAREN, /* unmatched brackets */
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REG_ASSERT, /* internal error: code overflow */
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REG_BADPAT, /* unrecognized character after (?< */
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REG_BADPAT, /* lookbehind assertion is not fixed length */
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REG_BADPAT, /* malformed number after (?( */
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REG_BADPAT, /* conditional group containe more than two branches */
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REG_BADPAT, /* assertion expected after (?( */
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REG_BADPAT, /* (?R or (?digits must be followed by ) */
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REG_ECTYPE, /* unknown POSIX class name */
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REG_BADPAT, /* POSIX collating elements are not supported */
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REG_INVARG, /* this version of PCRE is not compiled with PCRE_UTF8 support */
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REG_BADPAT, /* spare error */
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REG_BADPAT, /* character value in \x{...} sequence is too large */
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REG_BADPAT, /* invalid condition (?(0) */
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REG_BADPAT, /* \C not allowed in lookbehind assertion */
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REG_EESCAPE, /* PCRE does not support \L, \l, \N, \U, or \u */
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REG_BADPAT, /* number after (?C is > 255 */
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REG_BADPAT, /* closing ) for (?C expected */
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REG_BADPAT, /* recursive call could loop indefinitely */
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REG_BADPAT, /* unrecognized character after (?P */
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REG_BADPAT, /* syntax error after (?P */
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REG_BADPAT, /* two named groups have the same name */
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REG_BADPAT, /* invalid UTF-8 string */
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REG_BADPAT, /* support for \P, \p, and \X has not been compiled */
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REG_BADPAT, /* malformed \P or \p sequence */
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REG_BADPAT /* unknown property name after \P or \p */
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};
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/* Table of texts corresponding to POSIX error codes */
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static const char *pstring[] = {
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static const char *const pstring[] = {
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"", /* Dummy for value 0 */
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"internal error", /* REG_ASSERT */
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"invalid repeat counts in {}", /* BADBR */
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@@ -122,29 +127,11 @@ static const char *pstring[] = {
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/*************************************************
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* Translate PCRE text code to int *
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*************************************************/
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/* PCRE compile-time errors are given as strings defined as macros. We can just
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look them up in a table to turn them into POSIX-style error codes. */
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static int
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pcre_posix_error_code(const char *s)
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{
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size_t i;
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for (i = 0; i < sizeof(estring)/sizeof(char *); i++)
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if (strcmp(s, estring[i]) == 0) return eint[i];
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return REG_ASSERT;
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}
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/*************************************************
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* Translate error code to string *
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*************************************************/
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size_t
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EXPORT size_t
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regerror(int errcode, const regex_t *preg, char *errbuf, size_t errbuf_size)
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{
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const char *message, *addmessage;
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@@ -179,7 +166,7 @@ return length + addlength;
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* Free store held by a regex *
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*************************************************/
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void
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EXPORT void
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regfree(regex_t *preg)
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{
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(pcre_free)(preg->re_pcre);
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@@ -202,22 +189,25 @@ Returns: 0 on success
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various non-zero codes on failure
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*/
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int
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EXPORT int
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regcomp(regex_t *preg, const char *pattern, int cflags)
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{
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const char *errorptr;
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int erroffset;
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int errorcode;
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int options = 0;
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if ((cflags & REG_ICASE) != 0) options |= PCRE_CASELESS;
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if ((cflags & REG_NEWLINE) != 0) options |= PCRE_MULTILINE;
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if ((cflags & REG_DOTALL) != 0) options |= PCRE_DOTALL;
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preg->re_pcre = pcre_compile(pattern, options, &errorptr, &erroffset, NULL);
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preg->re_pcre = pcre_compile2(pattern, options, &errorcode, &errorptr,
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&erroffset, NULL);
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preg->re_erroffset = erroffset;
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if (preg->re_pcre == NULL) return pcre_posix_error_code(errorptr);
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if (preg->re_pcre == NULL) return eint[errorcode];
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preg->re_nsub = pcre_info(preg->re_pcre, NULL, NULL);
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preg->re_nsub = pcre_info((const pcre *)preg->re_pcre, NULL, NULL);
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return 0;
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}
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@@ -235,7 +225,7 @@ ints. However, if the number of possible capturing brackets is small, use a
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block of store on the stack, to reduce the use of malloc/free. The threshold is
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in a macro that can be changed at configure time. */
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int
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EXPORT int
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regexec(const regex_t *preg, const char *string, size_t nmatch,
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regmatch_t pmatch[], int eflags)
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{
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@@ -264,8 +254,8 @@ if (nmatch > 0)
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}
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}
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rc = pcre_exec(preg->re_pcre, NULL, string, (int)strlen(string), 0, options,
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ovector, nmatch * 3);
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rc = pcre_exec((const pcre *)preg->re_pcre, NULL, string, (int)strlen(string),
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0, options, ovector, nmatch * 3);
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if (rc == 0) rc = nmatch; /* All captured slots were filled in */
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@@ -293,6 +283,9 @@ else
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case PCRE_ERROR_BADMAGIC: return REG_INVARG;
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case PCRE_ERROR_UNKNOWN_NODE: return REG_ASSERT;
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case PCRE_ERROR_NOMEMORY: return REG_ESPACE;
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case PCRE_ERROR_MATCHLIMIT: return REG_ESPACE;
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case PCRE_ERROR_BADUTF8: return REG_INVARG;
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case PCRE_ERROR_BADUTF8_OFFSET: return REG_INVARG;
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default: return REG_ASSERT;
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}
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}
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