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/*
* Copyright (C) 1999-2000 Harri Porten (porten@kde.org)
* Copyright (C) 2008-2021 Apple Inc. All rights reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
#pragma once
#include "InternalFunction.h"
#include "JSGlobalObject.h"
#include "ObjectPrototype.h"
namespace JSC {
JSC_DECLARE_HOST_FUNCTION(objectConstructorGetOwnPropertyDescriptor);
JSC_DECLARE_HOST_FUNCTION(objectConstructorGetOwnPropertyDescriptors);
JSC_DECLARE_HOST_FUNCTION(objectConstructorGetOwnPropertySymbols);
JSC_DECLARE_HOST_FUNCTION(objectConstructorGetOwnPropertyNames);
JSC_DECLARE_HOST_FUNCTION(objectConstructorKeys);
class ObjectPrototype;
class ObjectConstructor final : public JSC::InternalFunction {
public:
typedef JSC::InternalFunction Base;
static constexpr unsigned StructureFlags = Base::StructureFlags | HasStaticPropertyTable;
static ObjectConstructor* create(VM& vm, JSGlobalObject* globalObject, Structure* structure, ObjectPrototype* objectPrototype)
{
ObjectConstructor* constructor = new (NotNull, allocateCell<ObjectConstructor>(vm)) ObjectConstructor(vm, structure);
constructor->finishCreation(vm, globalObject, objectPrototype);
return constructor;
}
DECLARE_INFO;
inline static Structure* createStructure(VM&, JSGlobalObject*, JSValue);
private:
ObjectConstructor(VM&, Structure*);
void finishCreation(VM&, JSGlobalObject*, ObjectPrototype*);
};
STATIC_ASSERT_ISO_SUBSPACE_SHARABLE(ObjectConstructor, JSC::InternalFunction);
inline JSFinalObject* constructEmptyObject(VM& vm, Structure* structure)
{
return JSFinalObject::create(vm, structure);
}
inline JSFinalObject* constructEmptyObject(JSGlobalObject* globalObject, JSObject* prototype, unsigned inlineCapacity)
{
VM& vm = getVM(globalObject);
Structure* structure = globalObject->structureCache().emptyObjectStructureForPrototype(globalObject, prototype, inlineCapacity);
return constructEmptyObject(vm, structure);
}
inline JSFinalObject* constructEmptyObject(JSGlobalObject* globalObject, JSObject* prototype)
{
return constructEmptyObject(globalObject, prototype, JSFinalObject::defaultInlineCapacity);
}
inline JSFinalObject* constructEmptyObject(JSGlobalObject* globalObject)
{
return JSFinalObject::createDefaultEmptyObject(globalObject);
}
inline JSObject* constructObject(JSGlobalObject* globalObject, JSValue arg)
{
if (arg.isUndefinedOrNull())
return constructEmptyObject(globalObject, globalObject->objectPrototype());
return arg.toObject(globalObject);
}
JS_EXPORT_PRIVATE JSObject* constructObjectFromPropertyDescriptorSlow(JSGlobalObject*, const PropertyDescriptor&);
static constexpr PropertyOffset dataPropertyDescriptorValuePropertyOffset = 0;
static constexpr PropertyOffset dataPropertyDescriptorWritablePropertyOffset = 1;
static constexpr PropertyOffset dataPropertyDescriptorEnumerablePropertyOffset = 2;
static constexpr PropertyOffset dataPropertyDescriptorConfigurablePropertyOffset = 3;
static constexpr PropertyOffset accessorPropertyDescriptorGetPropertyOffset = 0;
static constexpr PropertyOffset accessorPropertyDescriptorSetPropertyOffset = 1;
static constexpr PropertyOffset accessorPropertyDescriptorEnumerablePropertyOffset = 2;
static constexpr PropertyOffset accessorPropertyDescriptorConfigurablePropertyOffset = 3;
inline Structure* createDataPropertyDescriptorObjectStructure(VM& vm, JSGlobalObject& globalObject)
{
Structure* structure = globalObject.structureCache().emptyObjectStructureForPrototype(&globalObject, globalObject.objectPrototype(), JSFinalObject::defaultInlineCapacity);
PropertyOffset offset;
structure = Structure::addPropertyTransition(vm, structure, vm.propertyNames->value, 0, offset);
RELEASE_ASSERT(offset == dataPropertyDescriptorValuePropertyOffset);
structure = Structure::addPropertyTransition(vm, structure, vm.propertyNames->writable, 0, offset);
RELEASE_ASSERT(offset == dataPropertyDescriptorWritablePropertyOffset);
structure = Structure::addPropertyTransition(vm, structure, vm.propertyNames->enumerable, 0, offset);
RELEASE_ASSERT(offset == dataPropertyDescriptorEnumerablePropertyOffset);
structure = Structure::addPropertyTransition(vm, structure, vm.propertyNames->configurable, 0, offset);
RELEASE_ASSERT(offset == dataPropertyDescriptorConfigurablePropertyOffset);
return structure;
}
inline Structure* createAccessorPropertyDescriptorObjectStructure(VM& vm, JSGlobalObject& globalObject)
{
Structure* structure = globalObject.structureCache().emptyObjectStructureForPrototype(&globalObject, globalObject.objectPrototype(), JSFinalObject::defaultInlineCapacity);
PropertyOffset offset;
structure = Structure::addPropertyTransition(vm, structure, vm.propertyNames->get, 0, offset);
RELEASE_ASSERT(offset == accessorPropertyDescriptorGetPropertyOffset);
structure = Structure::addPropertyTransition(vm, structure, vm.propertyNames->set, 0, offset);
RELEASE_ASSERT(offset == accessorPropertyDescriptorSetPropertyOffset);
structure = Structure::addPropertyTransition(vm, structure, vm.propertyNames->enumerable, 0, offset);
RELEASE_ASSERT(offset == accessorPropertyDescriptorEnumerablePropertyOffset);
structure = Structure::addPropertyTransition(vm, structure, vm.propertyNames->configurable, 0, offset);
RELEASE_ASSERT(offset == accessorPropertyDescriptorConfigurablePropertyOffset);
return structure;
}
// https://tc39.es/ecma262/#sec-frompropertydescriptor
inline JSObject* constructObjectFromPropertyDescriptor(JSGlobalObject* globalObject, const PropertyDescriptor& descriptor)
{
VM& vm = getVM(globalObject);
if (descriptor.enumerablePresent() && descriptor.configurablePresent()) {
if (descriptor.value() && descriptor.writablePresent()) {
JSObject* result = constructEmptyObject(vm, globalObject->dataPropertyDescriptorObjectStructure());
result->putDirectOffset(vm, dataPropertyDescriptorValuePropertyOffset, descriptor.value());
result->putDirectOffset(vm, dataPropertyDescriptorWritablePropertyOffset, jsBoolean(descriptor.writable()));
result->putDirectOffset(vm, dataPropertyDescriptorEnumerablePropertyOffset, jsBoolean(descriptor.enumerable()));
result->putDirectOffset(vm, dataPropertyDescriptorConfigurablePropertyOffset, jsBoolean(descriptor.configurable()));
return result;
}
if (descriptor.getterPresent() && descriptor.setterPresent()) {
JSObject* result = constructEmptyObject(vm, globalObject->accessorPropertyDescriptorObjectStructure());
result->putDirectOffset(vm, accessorPropertyDescriptorGetPropertyOffset, descriptor.getter());
result->putDirectOffset(vm, accessorPropertyDescriptorSetPropertyOffset, descriptor.setter());
result->putDirectOffset(vm, accessorPropertyDescriptorEnumerablePropertyOffset, jsBoolean(descriptor.enumerable()));
result->putDirectOffset(vm, accessorPropertyDescriptorConfigurablePropertyOffset, jsBoolean(descriptor.configurable()));
return result;
}
}
return constructObjectFromPropertyDescriptorSlow(globalObject, descriptor);
}
JS_EXPORT_PRIVATE JSObject* objectConstructorFreeze(JSGlobalObject*, JSObject*);
JS_EXPORT_PRIVATE JSObject* objectConstructorSeal(JSGlobalObject*, JSObject*);
JSValue objectConstructorGetOwnPropertyDescriptor(JSGlobalObject*, JSObject*, const Identifier&);
JSValue objectConstructorGetOwnPropertyDescriptors(JSGlobalObject*, JSObject*);
JSArray* ownPropertyKeys(JSGlobalObject*, JSObject*, PropertyNameMode, DontEnumPropertiesMode);
bool toPropertyDescriptor(JSGlobalObject*, JSValue, PropertyDescriptor&);
void objectAssignGeneric(JSGlobalObject*, VM&, JSObject* target, JSObject* source);
JSC_DECLARE_HOST_FUNCTION(objectConstructorIs);
} // namespace JSC
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