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/*
* Copyright (C) 2013-2021 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 "MapConstructor.h"
#include "IteratorOperations.h"
#include "JSCInlines.h"
#include "JSMapInlines.h"
#include "MapPrototype.h"
namespace JSC {
const ClassInfo MapConstructor::s_info = { "Function"_s, &Base::s_info, nullptr, nullptr, CREATE_METHOD_TABLE(MapConstructor) };
void MapConstructor::finishCreation(VM& vm, MapPrototype* mapPrototype, GetterSetter* speciesSymbol)
{
Base::finishCreation(vm, 0, "Map"_s, PropertyAdditionMode::WithoutStructureTransition);
putDirectWithoutTransition(vm, vm.propertyNames->prototype, mapPrototype, PropertyAttribute::DontEnum | PropertyAttribute::DontDelete | PropertyAttribute::ReadOnly);
putDirectNonIndexAccessorWithoutTransition(vm, vm.propertyNames->speciesSymbol, speciesSymbol, PropertyAttribute::Accessor | PropertyAttribute::ReadOnly | PropertyAttribute::DontEnum);
}
static JSC_DECLARE_HOST_FUNCTION(callMap);
static JSC_DECLARE_HOST_FUNCTION(constructMap);
MapConstructor::MapConstructor(VM& vm, Structure* structure)
: Base(vm, structure, callMap, constructMap)
{
}
JSC_DEFINE_HOST_FUNCTION(callMap, (JSGlobalObject* globalObject, CallFrame*))
{
VM& vm = globalObject->vm();
auto scope = DECLARE_THROW_SCOPE(vm);
return JSValue::encode(throwConstructorCannotBeCalledAsFunctionTypeError(globalObject, scope, "Map"));
}
JSC_DEFINE_HOST_FUNCTION(constructMap, (JSGlobalObject* globalObject, CallFrame* callFrame))
{
VM& vm = globalObject->vm();
auto scope = DECLARE_THROW_SCOPE(vm);
JSObject* newTarget = asObject(callFrame->newTarget());
Structure* mapStructure = JSC_GET_DERIVED_STRUCTURE(vm, mapStructure, newTarget, callFrame->jsCallee());
RETURN_IF_EXCEPTION(scope, { });
JSValue iterable = callFrame->argument(0);
if (iterable.isUndefinedOrNull())
RELEASE_AND_RETURN(scope, JSValue::encode(JSMap::create(globalObject, vm, mapStructure)));
bool canPerformFastSet = JSMap::isSetFastAndNonObservable(mapStructure);
if (auto* iterableMap = jsDynamicCast<JSMap*>(iterable)) {
if (canPerformFastSet && iterableMap->isIteratorProtocolFastAndNonObservable())
RELEASE_AND_RETURN(scope, JSValue::encode(iterableMap->clone(globalObject, vm, mapStructure)));
}
JSMap* map = JSMap::create(globalObject, vm, mapStructure);
RETURN_IF_EXCEPTION(scope, encodedJSValue());
JSValue adderFunction;
CallData adderFunctionCallData;
if (!canPerformFastSet) {
adderFunction = map->JSObject::get(globalObject, vm.propertyNames->set);
RETURN_IF_EXCEPTION(scope, { });
adderFunctionCallData = JSC::getCallData(adderFunction);
if (UNLIKELY(adderFunctionCallData.type == CallData::Type::None))
return throwVMTypeError(globalObject, scope, "'set' property of a Map should be callable."_s);
}
scope.release();
forEachInIterable(globalObject, iterable, [&](VM& vm, JSGlobalObject* globalObject, JSValue nextItem) {
auto scope = DECLARE_THROW_SCOPE(vm);
if (!nextItem.isObject()) {
throwTypeError(globalObject, scope);
return;
}
JSObject* nextObject = asObject(nextItem);
JSValue key = nextObject->getIndex(globalObject, static_cast<unsigned>(0));
RETURN_IF_EXCEPTION(scope, void());
JSValue value = nextObject->getIndex(globalObject, static_cast<unsigned>(1));
RETURN_IF_EXCEPTION(scope, void());
scope.release();
if (canPerformFastSet) {
map->set(mapStructure->globalObject(), key, value);
return;
}
MarkedArgumentBuffer arguments;
arguments.append(key);
arguments.append(value);
ASSERT(!arguments.hasOverflowed());
call(globalObject, adderFunction, adderFunctionCallData, map, arguments);
});
return JSValue::encode(map);
}
JSC_DEFINE_HOST_FUNCTION(mapPrivateFuncMapBucketHead, (JSGlobalObject*, CallFrame* callFrame))
{
ASSERT(jsDynamicCast<JSMap*>(callFrame->argument(0)));
JSMap* map = jsCast<JSMap*>(callFrame->uncheckedArgument(0));
auto* head = map->head();
ASSERT(head);
return JSValue::encode(head);
}
JSC_DEFINE_HOST_FUNCTION(mapPrivateFuncMapBucketNext, (JSGlobalObject* globalObject, CallFrame* callFrame))
{
ASSERT(jsDynamicCast<JSMap::BucketType*>(callFrame->argument(0)));
auto* bucket = jsCast<JSMap::BucketType*>(callFrame->uncheckedArgument(0));
ASSERT(bucket);
bucket = bucket->next();
while (bucket) {
if (!bucket->deleted())
return JSValue::encode(bucket);
bucket = bucket->next();
}
return JSValue::encode(globalObject->vm().sentinelMapBucket());
}
JSC_DEFINE_HOST_FUNCTION(mapPrivateFuncMapBucketKey, (JSGlobalObject*, CallFrame* callFrame))
{
ASSERT(jsDynamicCast<JSMap::BucketType*>(callFrame->argument(0)));
auto* bucket = jsCast<JSMap::BucketType*>(callFrame->uncheckedArgument(0));
ASSERT(bucket);
return JSValue::encode(bucket->key());
}
JSC_DEFINE_HOST_FUNCTION(mapPrivateFuncMapBucketValue, (JSGlobalObject*, CallFrame* callFrame))
{
ASSERT(jsDynamicCast<JSMap::BucketType*>(callFrame->argument(0)));
auto* bucket = jsCast<JSMap::BucketType*>(callFrame->uncheckedArgument(0));
ASSERT(bucket);
return JSValue::encode(bucket->value());
}
}