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/*
* Copyright (C) 1999-2001, 2004 Harri Porten (porten@kde.org)
* Copyright (c) 2007, 2008 Apple Inc. All rights reserved.
* Copyright (C) 2009 Torch Mobile, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
#include "config.h"
#include "RegExp.h"
#include "Lexer.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <wtf/Assertions.h>
#include <wtf/OwnArrayPtr.h>
#if ENABLE(YARR)
#include "yarr/RegexCompiler.h"
#if ENABLE(YARR_JIT)
#include "yarr/RegexJIT.h"
#else
#include "yarr/RegexInterpreter.h"
#endif
#else
#include <pcre/pcre.h>
#endif
namespace JSC {
inline RegExp::RegExp(JSGlobalData* globalData, const UString& pattern)
: m_pattern(pattern)
, m_flagBits(0)
, m_constructionError(0)
, m_numSubpatterns(0)
{
compile(globalData);
}
inline RegExp::RegExp(JSGlobalData* globalData, const UString& pattern, const UString& flags)
: m_pattern(pattern)
, m_flagBits(0)
, m_constructionError(0)
, m_numSubpatterns(0)
{
// NOTE: The global flag is handled on a case-by-case basis by functions like
// String::match and RegExpObject::match.
if (flags.find('g') != UString::NotFound)
m_flagBits |= Global;
if (flags.find('i') != UString::NotFound)
m_flagBits |= IgnoreCase;
if (flags.find('m') != UString::NotFound)
m_flagBits |= Multiline;
compile(globalData);
}
#if !ENABLE(YARR)
RegExp::~RegExp()
{
jsRegExpFree(m_regExp);
}
#endif
PassRefPtr<RegExp> RegExp::create(JSGlobalData* globalData, const UString& pattern)
{
return adoptRef(new RegExp(globalData, pattern));
}
PassRefPtr<RegExp> RegExp::create(JSGlobalData* globalData, const UString& pattern, const UString& flags)
{
return adoptRef(new RegExp(globalData, pattern, flags));
}
#if ENABLE(YARR)
void RegExp::compile(JSGlobalData* globalData)
{
#if ENABLE(YARR_JIT)
Yarr::jitCompileRegex(globalData, m_regExpJITCode, m_pattern, m_numSubpatterns, m_constructionError, ignoreCase(), multiline());
#else
UNUSED_PARAM(globalData);
m_regExpBytecode.set(Yarr::byteCompileRegex(m_pattern, m_numSubpatterns, m_constructionError, ignoreCase(), multiline()));
#endif
}
int RegExp::match(const UString& s, int startOffset, Vector<int, 32>* ovector)
{
if (startOffset < 0)
startOffset = 0;
if (ovector)
ovector->clear();
if (static_cast<unsigned>(startOffset) > s.size() || s.isNull())
return -1;
#if ENABLE(YARR_JIT)
if (!!m_regExpJITCode) {
#else
if (m_regExpBytecode) {
#endif
int offsetVectorSize = (m_numSubpatterns + 1) * 3; // FIXME: should be 2 - but adding temporary fallback to pcre.
int* offsetVector;
Vector<int, 32> nonReturnedOvector;
if (ovector) {
ovector->resize(offsetVectorSize);
offsetVector = ovector->data();
} else {
nonReturnedOvector.resize(offsetVectorSize);
offsetVector = nonReturnedOvector.data();
}
ASSERT(offsetVector);
for (int j = 0; j < offsetVectorSize; ++j)
offsetVector[j] = -1;
#if ENABLE(YARR_JIT)
int result = Yarr::executeRegex(m_regExpJITCode, s.data(), startOffset, s.size(), offsetVector, offsetVectorSize);
#else
int result = Yarr::interpretRegex(m_regExpBytecode.get(), s.data(), startOffset, s.size(), offsetVector);
#endif
if (result < 0) {
#ifndef NDEBUG
// TODO: define up a symbol, rather than magic -1
if (result != -1)
fprintf(stderr, "jsRegExpExecute failed with result %d\n", result);
#endif
if (ovector)
ovector->clear();
}
return result;
}
return -1;
}
#else
void RegExp::compile(JSGlobalData*)
{
m_regExp = 0;
JSRegExpIgnoreCaseOption ignoreCaseOption = ignoreCase() ? JSRegExpIgnoreCase : JSRegExpDoNotIgnoreCase;
JSRegExpMultilineOption multilineOption = multiline() ? JSRegExpMultiline : JSRegExpSingleLine;
m_regExp = jsRegExpCompile(reinterpret_cast<const UChar*>(m_pattern.data()), m_pattern.size(), ignoreCaseOption, multilineOption, &m_numSubpatterns, &m_constructionError);
}
int RegExp::match(const UString& s, int startOffset, Vector<int, 32>* ovector)
{
if (startOffset < 0)
startOffset = 0;
if (ovector)
ovector->clear();
if (static_cast<unsigned>(startOffset) > s.size() || s.isNull())
return -1;
if (m_regExp) {
// Set up the offset vector for the result.
// First 2/3 used for result, the last third used by PCRE.
int* offsetVector;
int offsetVectorSize;
int fixedSizeOffsetVector[3];
if (!ovector) {
offsetVectorSize = 3;
offsetVector = fixedSizeOffsetVector;
} else {
offsetVectorSize = (m_numSubpatterns + 1) * 3;
ovector->resize(offsetVectorSize);
offsetVector = ovector->data();
}
int numMatches = jsRegExpExecute(m_regExp, reinterpret_cast<const UChar*>(s.data()), s.size(), startOffset, offsetVector, offsetVectorSize);
if (numMatches < 0) {
#ifndef NDEBUG
if (numMatches != JSRegExpErrorNoMatch)
fprintf(stderr, "jsRegExpExecute failed with result %d\n", numMatches);
#endif
if (ovector)
ovector->clear();
return -1;
}
return offsetVector[0];
}
return -1;
}
#endif
} // namespace JSC
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