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/*
* Copyright (C) 1999-2001, 2004 Harri Porten (porten@kde.org)
* Copyright (c) 2007, 2008, 2016 Apple Inc. All rights reserved.
* Copyright (C) 2009 Torch Mobile, Inc.
* Copyright (C) 2010 Peter Varga (pvarga@inf.u-szeged.hu), University of Szeged
*
* 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
*
*/
#pragma once
#include "RegExp.h"
#include "JSCInlines.h"
#include "Yarr.h"
#include "YarrInterpreter.h"
#include "YarrJIT.h"
#define REGEXP_FUNC_TEST_DATA_GEN 0
#if REGEXP_FUNC_TEST_DATA_GEN
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#endif
namespace JSC {
#if REGEXP_FUNC_TEST_DATA_GEN
class RegExpFunctionalTestCollector {
// This class is not thread safe.
protected:
static const char* const s_fileName;
public:
static RegExpFunctionalTestCollector* get();
~RegExpFunctionalTestCollector();
void outputOneTest(RegExp*, String, int, int*, int);
void clearRegExp(RegExp* regExp)
{
if (regExp == m_lastRegExp)
m_lastRegExp = 0;
}
private:
RegExpFunctionalTestCollector();
void outputEscapedString(const String&, bool escapeSlash = false);
static RegExpFunctionalTestCollector* s_instance;
FILE* m_file;
RegExp* m_lastRegExp;
};
#endif // REGEXP_FUNC_TEST_DATA_GEN
ALWAYS_INLINE bool RegExp::hasCodeFor(Yarr::YarrCharSize charSize)
{
if (hasCode()) {
#if ENABLE(YARR_JIT)
if (m_state != JITCode)
return true;
if ((charSize == Yarr::Char8) && (m_regExpJITCode.has8BitCode()))
return true;
if ((charSize == Yarr::Char16) && (m_regExpJITCode.has16BitCode()))
return true;
#else
UNUSED_PARAM(charSize);
return true;
#endif
}
return false;
}
ALWAYS_INLINE void RegExp::compileIfNecessary(VM& vm, Yarr::YarrCharSize charSize)
{
if (hasCodeFor(charSize))
return;
compile(&vm, charSize);
}
template<typename VectorType>
ALWAYS_INLINE int RegExp::matchInline(VM& vm, const String& s, unsigned startOffset, VectorType& ovector)
{
#if ENABLE(REGEXP_TRACING)
m_rtMatchCallCount++;
m_rtMatchTotalSubjectStringLen += (double)(s.length() - startOffset);
#endif
ASSERT(m_state != ParseError);
compileIfNecessary(vm, s.is8Bit() ? Yarr::Char8 : Yarr::Char16);
int offsetVectorSize = (m_numSubpatterns + 1) * 2;
ovector.resize(offsetVectorSize);
int* offsetVector = ovector.data();
int result;
#if ENABLE(YARR_JIT)
if (m_state == JITCode) {
if (s.is8Bit())
result = m_regExpJITCode.execute(s.characters8(), startOffset, s.length(), offsetVector).start;
else
result = m_regExpJITCode.execute(s.characters16(), startOffset, s.length(), offsetVector).start;
#if ENABLE(YARR_JIT_DEBUG)
matchCompareWithInterpreter(s, startOffset, offsetVector, result);
#endif
} else
#endif
result = Yarr::interpret(m_regExpBytecode.get(), s, startOffset, reinterpret_cast<unsigned*>(offsetVector));
// FIXME: The YARR engine should handle unsigned or size_t length matches.
// The YARR Interpreter is "unsigned" clean, while the YARR JIT hasn't been addressed.
// The offset vector handling needs to change as well.
// Right now we convert a match where the offsets overflowed into match failure.
// There are two places in WebCore that call the interpreter directly that need to
// have their offsets changed to int as well. They are yarr/RegularExpression.cpp
// and inspector/ContentSearchUtilities.cpp
if (s.length() > INT_MAX) {
bool overflowed = false;
if (result < -1)
overflowed = true;
for (unsigned i = 0; i <= m_numSubpatterns; i++) {
if ((offsetVector[i*2] < -1) || ((offsetVector[i*2] >= 0) && (offsetVector[i*2+1] < -1))) {
overflowed = true;
offsetVector[i*2] = -1;
offsetVector[i*2+1] = -1;
}
}
if (overflowed)
result = -1;
}
ASSERT(result >= -1);
#if REGEXP_FUNC_TEST_DATA_GEN
RegExpFunctionalTestCollector::get()->outputOneTest(this, s, startOffset, offsetVector, result);
#endif
#if ENABLE(REGEXP_TRACING)
if (result != -1)
m_rtMatchFoundCount++;
#endif
return result;
}
ALWAYS_INLINE bool RegExp::hasMatchOnlyCodeFor(Yarr::YarrCharSize charSize)
{
if (hasCode()) {
#if ENABLE(YARR_JIT)
if (m_state != JITCode)
return true;
if ((charSize == Yarr::Char8) && (m_regExpJITCode.has8BitCodeMatchOnly()))
return true;
if ((charSize == Yarr::Char16) && (m_regExpJITCode.has16BitCodeMatchOnly()))
return true;
#else
UNUSED_PARAM(charSize);
return true;
#endif
}
return false;
}
ALWAYS_INLINE void RegExp::compileIfNecessaryMatchOnly(VM& vm, Yarr::YarrCharSize charSize)
{
if (hasMatchOnlyCodeFor(charSize))
return;
compileMatchOnly(&vm, charSize);
}
ALWAYS_INLINE MatchResult RegExp::matchInline(VM& vm, const String& s, unsigned startOffset)
{
#if ENABLE(REGEXP_TRACING)
m_rtMatchOnlyCallCount++;
m_rtMatchOnlyTotalSubjectStringLen += (double)(s.length() - startOffset);
#endif
ASSERT(m_state != ParseError);
compileIfNecessaryMatchOnly(vm, s.is8Bit() ? Yarr::Char8 : Yarr::Char16);
#if ENABLE(YARR_JIT)
if (m_state == JITCode) {
MatchResult result = s.is8Bit() ?
m_regExpJITCode.execute(s.characters8(), startOffset, s.length()) :
m_regExpJITCode.execute(s.characters16(), startOffset, s.length());
#if ENABLE(REGEXP_TRACING)
if (!result)
m_rtMatchOnlyFoundCount++;
#endif
return result;
}
#endif
int offsetVectorSize = (m_numSubpatterns + 1) * 2;
int* offsetVector;
Vector<int, 32> nonReturnedOvector;
nonReturnedOvector.resize(offsetVectorSize);
offsetVector = nonReturnedOvector.data();
int r = Yarr::interpret(m_regExpBytecode.get(), s, startOffset, reinterpret_cast<unsigned*>(offsetVector));
#if REGEXP_FUNC_TEST_DATA_GEN
RegExpFunctionalTestCollector::get()->outputOneTest(this, s, startOffset, offsetVector, result);
#endif
if (r >= 0) {
#if ENABLE(REGEXP_TRACING)
m_rtMatchOnlyFoundCount++;
#endif
return MatchResult(r, reinterpret_cast<unsigned*>(offsetVector)[1]);
}
return MatchResult::failed();
}
} // namespace JSC
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