1/*
2 * Copyright (C) 1999-2000 Harri Porten ([email protected])
3 * Copyright (C) 2008-2019 Apple Inc. All rights reserved.
4 *
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Lesser General Public
7 * License as published by the Free Software Foundation; either
8 * version 2 of the License, or (at your option) any later version.
9 *
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Lesser General Public License for more details.
14 *
15 * You should have received a copy of the GNU Lesser General Public
16 * License along with this library; if not, write to the Free Software
17 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
18 *
19 */
20
21#pragma once
22
23#include "InternalFunction.h"
24#include "JSGlobalObject.h"
25#include "ObjectPrototype.h"
26
27namespace JSC {
28
29EncodedJSValue JSC_HOST_CALL objectConstructorGetOwnPropertyDescriptor(JSGlobalObject*, CallFrame*);
30EncodedJSValue JSC_HOST_CALL objectConstructorGetOwnPropertyDescriptors(JSGlobalObject*, CallFrame*);
31EncodedJSValue JSC_HOST_CALL objectConstructorGetOwnPropertySymbols(JSGlobalObject*, CallFrame*);
32EncodedJSValue JSC_HOST_CALL objectConstructorGetOwnPropertyNames(JSGlobalObject*, CallFrame*);
33EncodedJSValue JSC_HOST_CALL objectConstructorKeys(JSGlobalObject*, CallFrame*);
34
35class ObjectPrototype;
36
37class ObjectConstructor final : public InternalFunction {
38public:
39 typedef InternalFunction Base;
40 static constexpr unsigned StructureFlags = Base::StructureFlags | HasStaticPropertyTable;
41
42 static ObjectConstructor* create(VM& vm, JSGlobalObject* globalObject, Structure* structure, ObjectPrototype* objectPrototype)
43 {
44 ObjectConstructor* constructor = new (NotNull, allocateCell<ObjectConstructor>(vm.heap)) ObjectConstructor(vm, structure);
45 constructor->finishCreation(vm, globalObject, objectPrototype);
46 return constructor;
47 }
48
49 DECLARE_INFO;
50
51 static Structure* createStructure(VM& vm, JSGlobalObject* globalObject, JSValue prototype)
52 {
53 return Structure::create(vm, globalObject, prototype, TypeInfo(InternalFunctionType, StructureFlags), info());
54 }
55
56protected:
57 void finishCreation(VM&, JSGlobalObject*, ObjectPrototype*);
58
59private:
60 ObjectConstructor(VM&, Structure*);
61};
62
63inline JSFinalObject* constructEmptyObject(VM& vm, Structure* structure)
64{
65 return JSFinalObject::create(vm, structure);
66}
67
68inline JSFinalObject* constructEmptyObject(JSGlobalObject* globalObject, JSObject* prototype, unsigned inlineCapacity)
69{
70 VM& vm = getVM(globalObject);
71 StructureCache& structureCache = vm.structureCache;
72 Structure* structure = structureCache.emptyObjectStructureForPrototype(globalObject, prototype, inlineCapacity);
73 return constructEmptyObject(vm, structure);
74}
75
76inline JSFinalObject* constructEmptyObject(JSGlobalObject* globalObject, JSObject* prototype)
77{
78 return constructEmptyObject(globalObject, prototype, JSFinalObject::defaultInlineCapacity());
79}
80
81inline JSFinalObject* constructEmptyObject(JSGlobalObject* globalObject)
82{
83 return constructEmptyObject(getVM(globalObject), globalObject->objectStructureForObjectConstructor());
84}
85
86inline JSObject* constructObject(JSGlobalObject* globalObject, JSValue arg)
87{
88 if (arg.isUndefinedOrNull())
89 return constructEmptyObject(globalObject, globalObject->objectPrototype());
90 return arg.toObject(globalObject);
91}
92
93// Section 6.2.4.4 of the ES6 specification.
94// https://tc39.github.io/ecma262/#sec-frompropertydescriptor
95inline JSObject* constructObjectFromPropertyDescriptor(JSGlobalObject* globalObject, const PropertyDescriptor& descriptor)
96{
97 VM& vm = getVM(globalObject);
98 auto scope = DECLARE_THROW_SCOPE(vm);
99 JSObject* description = constructEmptyObject(globalObject);
100 RETURN_IF_EXCEPTION(scope, nullptr);
101
102 if (!descriptor.isAccessorDescriptor()) {
103 description->putDirect(vm, vm.propertyNames->value, descriptor.value() ? descriptor.value() : jsUndefined(), 0);
104 description->putDirect(vm, vm.propertyNames->writable, jsBoolean(descriptor.writable()), 0);
105 } else {
106 ASSERT(descriptor.getter() || descriptor.setter());
107 if (descriptor.getter())
108 description->putDirect(vm, vm.propertyNames->get, descriptor.getter(), 0);
109 if (descriptor.setter())
110 description->putDirect(vm, vm.propertyNames->set, descriptor.setter(), 0);
111 }
112
113 description->putDirect(vm, vm.propertyNames->enumerable, jsBoolean(descriptor.enumerable()), 0);
114 description->putDirect(vm, vm.propertyNames->configurable, jsBoolean(descriptor.configurable()), 0);
115
116 return description;
117}
118
119
120JS_EXPORT_PRIVATE JSObject* objectConstructorFreeze(JSGlobalObject*, JSObject*);
121JS_EXPORT_PRIVATE JSObject* objectConstructorSeal(JSGlobalObject*, JSObject*);
122JSValue objectConstructorGetOwnPropertyDescriptor(JSGlobalObject*, JSObject*, const Identifier&);
123JSValue objectConstructorGetOwnPropertyDescriptors(JSGlobalObject*, JSObject*);
124JSArray* ownPropertyKeys(JSGlobalObject*, JSObject*, PropertyNameMode, DontEnumPropertiesMode);
125bool toPropertyDescriptor(JSGlobalObject*, JSValue, PropertyDescriptor&);
126
127} // namespace JSC
128