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/*
* Copyright (C) 2013, 2016 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 "JSMap.h"
#include "JSCInlines.h"
#include "MapPrototype.h"
namespace JSC {
const ClassInfo JSMap::s_info = { "Map", &Base::s_info, nullptr, nullptr, CREATE_METHOD_TABLE(JSMap) };
String JSMap::toStringName(const JSObject*, ExecState*)
{
return ASCIILiteral("Object");
}
JSMap* JSMap::clone(ExecState* exec, VM& vm, Structure* structure)
{
JSMap* instance = new (NotNull, allocateCell<JSMap>(vm.heap)) JSMap(vm, structure);
instance->finishCreation(exec, vm, this);
return instance;
}
bool JSMap::isIteratorProtocolFastAndNonObservable()
{
JSGlobalObject* globalObject = this->globalObject();
if (!globalObject->isMapPrototypeIteratorProtocolFastAndNonObservable())
return false;
Structure* structure = this->structure();
// This is the fast case. Many maps will be an original map.
if (structure == globalObject->mapStructure())
return true;
VM& vm = globalObject->vm();
if (getPrototypeDirect(vm) != globalObject->mapPrototype())
return false;
if (getDirectOffset(vm, vm.propertyNames->iteratorSymbol) != invalidOffset)
return false;
return true;
}
bool JSMap::canCloneFastAndNonObservable(Structure* structure)
{
auto setFastAndNonObservable = [&] (Structure* structure) {
JSGlobalObject* globalObject = structure->globalObject();
if (!globalObject->isMapPrototypeSetFastAndNonObservable())
return false;
if (structure->hasPolyProto())
return false;
if (structure->storedPrototype() != globalObject->mapPrototype())
return false;
return true;
};
return isIteratorProtocolFastAndNonObservable() && setFastAndNonObservable(structure);
}
}