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/*
* Copyright (C) 2019 Apple Inc. All Rights Reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#pragma once
#include "RegExpGlobalData.h"
namespace JSC {
ALWAYS_INLINE void RegExpCachedResult::record(VM& vm, JSObject* owner, RegExp* regExp, JSString* input, MatchResult result, bool oneCharacterMatch)
{
m_lastRegExp.setWithoutWriteBarrier(regExp);
m_lastInput.setWithoutWriteBarrier(input);
m_result = result;
m_reified = false;
m_oneCharacterMatch = oneCharacterMatch;
vm.writeBarrier(owner);
}
inline void RegExpGlobalData::setInput(JSGlobalObject* globalObject, JSString* string)
{
m_cachedResult.setInput(globalObject, globalObject, string);
}
/*
To facilitate result caching, exec(), test(), match(), search(), and replace() dipatch regular
expression matching through the performMatch function. We use cached results to calculate,
e.g., RegExp.lastMatch and RegExp.leftParen.
*/
ALWAYS_INLINE MatchResult RegExpGlobalData::performMatch(JSGlobalObject* owner, RegExp* regExp, JSString* string, StringView input, int startOffset, int** ovector)
{
ASSERT(owner);
VM& vm = owner->vm();
auto scope = DECLARE_THROW_SCOPE(vm);
int position = regExp->match(owner, input, startOffset, m_ovector);
RETURN_IF_EXCEPTION(scope, MatchResult::failed());
if (ovector)
*ovector = m_ovector.data();
if (position == -1)
return MatchResult::failed();
ASSERT(!m_ovector.isEmpty());
ASSERT(m_ovector[0] == position);
ASSERT(m_ovector[1] >= position);
size_t end = m_ovector[1];
m_cachedResult.record(vm, owner, regExp, string, MatchResult(position, end), /* oneCharacterMatch */ false);
return MatchResult(position, end);
}
ALWAYS_INLINE MatchResult RegExpGlobalData::performMatch(JSGlobalObject* owner, RegExp* regExp, JSString* string, StringView input, int startOffset)
{
ASSERT(owner);
VM& vm = owner->vm();
auto scope = DECLARE_THROW_SCOPE(vm);
MatchResult result = regExp->match(owner, input, startOffset);
RETURN_IF_EXCEPTION(scope, MatchResult::failed());
if (result)
m_cachedResult.record(vm, owner, regExp, string, result, /* oneCharacterMatch */ false);
return result;
}
ALWAYS_INLINE void RegExpGlobalData::recordMatch(VM& vm, JSGlobalObject* owner, RegExp* regExp, JSString* string, const MatchResult& result, bool oneCharacterMatch)
{
ASSERT(result);
m_cachedResult.record(vm, owner, regExp, string, result, oneCharacterMatch);
}
inline MatchResult RegExpGlobalData::matchResult() const
{
return m_cachedResult.result();
}
inline void RegExpGlobalData::resetResultFromCache(JSGlobalObject* owner, RegExp* regExp, JSString* string, MatchResult matchResult, Vector<int>&& vector)
{
m_ovector = WTFMove(vector);
m_cachedResult.record(getVM(owner), owner, regExp, string, matchResult, /* oneCharacterMatch */ false);
}
}
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