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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>
#include "yarr/RegexCompiler.h"
#if ENABLE(YARR_JIT)
#include "yarr/RegexJIT.h"
#else
#include "yarr/RegexInterpreter.h"
#endif
namespace JSC {
struct RegExpRepresentation {
#if ENABLE(YARR_JIT)
Yarr::RegexCodeBlock m_regExpJITCode;
#else
OwnPtr<Yarr::BytecodePattern> m_regExpBytecode;
#endif
};
inline RegExp::RegExp(JSGlobalData* globalData, const UString& pattern, const UString& flags)
: m_pattern(pattern)
, m_flagBits(0)
, m_constructionError(0)
, m_numSubpatterns(0)
#if ENABLE(REGEXP_TRACING)
, m_rtMatchCallCount(0)
, m_rtMatchFoundCount(0)
#endif
, m_representation(adoptPtr(new RegExpRepresentation))
{
// NOTE: The global flag is handled on a case-by-case basis by functions like
// String::match and RegExpObject::match.
if (!flags.isNull()) {
if (flags.find('g') != notFound)
m_flagBits |= Global;
if (flags.find('i') != notFound)
m_flagBits |= IgnoreCase;
if (flags.find('m') != notFound)
m_flagBits |= Multiline;
}
compile(globalData);
}
RegExp::~RegExp()
{
}
PassRefPtr<RegExp> RegExp::create(JSGlobalData* globalData, const UString& pattern, const UString& flags)
{
RefPtr<RegExp> res = adoptRef(new RegExp(globalData, pattern, flags));
#if ENABLE(REGEXP_TRACING)
globalData->addRegExpToTrace(res);
#endif
return res.release();
}
void RegExp::compile(JSGlobalData* globalData)
{
#if ENABLE(YARR_JIT)
Yarr::jitCompileRegex(globalData, m_representation->m_regExpJITCode, m_pattern, m_numSubpatterns, m_constructionError, &globalData->m_regexAllocator, ignoreCase(), multiline());
#else
m_representation->m_regExpBytecode = Yarr::byteCompileRegex(m_pattern, m_numSubpatterns, m_constructionError, &globalData->m_regexAllocator, ignoreCase(), multiline());
#endif
}
int RegExp::match(const UString& s, int startOffset, Vector<int, 32>* ovector)
{
if (startOffset < 0)
startOffset = 0;
#if ENABLE(REGEXP_TRACING)
m_rtMatchCallCount++;
#endif
if (static_cast<unsigned>(startOffset) > s.length() || s.isNull())
return -1;
#if ENABLE(YARR_JIT)
if (!!m_representation->m_regExpJITCode) {
#else
if (m_representation->m_regExpBytecode) {
#endif
int offsetVectorSize = (m_numSubpatterns + 1) * 2;
int* offsetVector;
Vector<int, 32> nonReturnedOvector;
if (ovector) {
ovector->resize(offsetVectorSize);
offsetVector = ovector->data();
} else {
nonReturnedOvector.resize(offsetVectorSize);
offsetVector = nonReturnedOvector.data();
}
ASSERT(offsetVector);
// Initialize offsetVector with the return value (index 0) and the
// first subpattern start indicies (even index values) set to -1.
// No need to init the subpattern end indicies.
for (unsigned j = 0, i = 0; i < m_numSubpatterns + 1; j += 2, i++)
offsetVector[j] = -1;
#if ENABLE(YARR_JIT)
int result = Yarr::executeRegex(m_representation->m_regExpJITCode, s.characters(), startOffset, s.length(), offsetVector);
#else
int result = Yarr::interpretRegex(m_representation->m_regExpBytecode.get(), s.characters(), startOffset, s.length(), offsetVector);
#endif
ASSERT(result >= -1);;
#if ENABLE(REGEXP_TRACING)
if (result != -1)
m_rtMatchFoundCount++;
#endif
return result;
}
return -1;
}
#if ENABLE(REGEXP_TRACING)
void RegExp::printTraceData()
{
char formattedPattern[41];
char rawPattern[41];
strncpy(rawPattern, m_pattern.utf8().data(), 40);
rawPattern[40]= '\0';
int pattLen = strlen(rawPattern);
snprintf(formattedPattern, 41, (pattLen <= 38) ? "/%.38s/" : "/%.36s...", rawPattern);
#if ENABLE(YARR_JIT)
Yarr::RegexCodeBlock& codeBlock = m_representation->m_regExpJITCode;
char jitAddr[20];
if (codeBlock.getFallback())
sprintf(jitAddr, "fallback");
else
sprintf(jitAddr, "0x%014lx", reinterpret_cast<unsigned long int>(codeBlock.getAddr()));
#else
const char* jitAddr = "JIT Off";
#endif
printf("%-40.40s %16.16s %10d %10d\n", formattedPattern, jitAddr, m_rtMatchCallCount, m_rtMatchFoundCount);
}
#endif
} // namespace JSC
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