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/*
* Copyright (C) 2012-2021 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.
*/
#include "config.h"
#include "RegExpCachedResult.h"
#include "RegExpCache.h"
#include "RegExpMatchesArray.h"
namespace JSC {
template<typename Visitor>
void RegExpCachedResult::visitAggregateImpl(Visitor& visitor)
{
visitor.append(m_lastInput);
visitor.append(m_lastRegExp);
if (m_reified) {
visitor.append(m_reifiedInput);
visitor.append(m_reifiedResult);
visitor.append(m_reifiedLeftContext);
visitor.append(m_reifiedRightContext);
}
}
DEFINE_VISIT_AGGREGATE(RegExpCachedResult);
JSArray* RegExpCachedResult::lastResult(JSGlobalObject* globalObject, JSObject* owner)
{
VM& vm = globalObject->vm();
auto scope = DECLARE_THROW_SCOPE(vm);
if (!m_reified) {
m_reifiedInput.set(vm, owner, m_lastInput.get());
if (!m_lastRegExp)
m_lastRegExp.set(vm, owner, vm.regExpCache()->ensureEmptyRegExp(vm));
JSArray* result = nullptr;
if (m_result)
result = createRegExpMatchesArray(globalObject, m_lastInput.get(), m_lastRegExp.get(), m_result.start);
else
result = createEmptyRegExpMatchesArray(globalObject, m_lastInput.get(), m_lastRegExp.get());
RETURN_IF_EXCEPTION(scope, nullptr);
m_reifiedResult.setWithoutWriteBarrier(result);
m_reifiedLeftContext.clear();
m_reifiedRightContext.clear();
m_reified = true;
vm.writeBarrier(owner);
}
return m_reifiedResult.get();
}
JSString* RegExpCachedResult::leftContext(JSGlobalObject* globalObject, JSObject* owner)
{
// Make sure we're reified.
VM& vm = globalObject->vm();
auto scope = DECLARE_THROW_SCOPE(vm);
lastResult(globalObject, owner);
RETURN_IF_EXCEPTION(scope, nullptr);
if (!m_reifiedLeftContext) {
JSString* leftContext = jsSubstring(globalObject, m_reifiedInput.get(), 0, m_result.start);
RETURN_IF_EXCEPTION(scope, nullptr);
m_reifiedLeftContext.set(vm, owner, leftContext);
}
return m_reifiedLeftContext.get();
}
JSString* RegExpCachedResult::rightContext(JSGlobalObject* globalObject, JSObject* owner)
{
// Make sure we're reified.
VM& vm = globalObject->vm();
auto scope = DECLARE_THROW_SCOPE(vm);
lastResult(globalObject, owner);
RETURN_IF_EXCEPTION(scope, nullptr);
if (!m_reifiedRightContext) {
unsigned length = m_reifiedInput->length();
JSString* rightContext = jsSubstring(globalObject, m_reifiedInput.get(), m_result.end, length - m_result.end);
RETURN_IF_EXCEPTION(scope, nullptr);
m_reifiedRightContext.set(vm, owner, rightContext);
}
return m_reifiedRightContext.get();
}
void RegExpCachedResult::setInput(JSGlobalObject* globalObject, JSObject* owner, JSString* input)
{
// Make sure we're reified, otherwise m_reifiedInput will be ignored.
VM& vm = globalObject->vm();
auto scope = DECLARE_THROW_SCOPE(vm);
lastResult(globalObject, owner);
RETURN_IF_EXCEPTION(scope, void());
leftContext(globalObject, owner);
RETURN_IF_EXCEPTION(scope, void());
rightContext(globalObject, owner);
RETURN_IF_EXCEPTION(scope, void());
ASSERT(m_reified);
m_reifiedInput.set(vm, owner, input);
}
} // namespace JSC
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