| /* |
| * 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); |
| } |
| |
| } |