1 /*
2 * Copyright (C) 1999-2000 Harri Porten (porten@kde.org)
3 * Copyright (C) 2008 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 #include "config.h"
22 #include "ObjectConstructor.h"
23
24 #include "JSFunction.h"
25 #include "JSGlobalObject.h"
26 #include "ObjectPrototype.h"
27 #include "PrototypeFunction.h"
28
29 namespace JSC {
30
31 ASSERT_CLASS_FITS_IN_CELL(ObjectConstructor);
32
33 static JSValue JSC_HOST_CALL objectConstructorGetPrototypeOf(ExecState*, JSObject*, JSValue, const ArgList&);
34
ObjectConstructor(ExecState * exec,PassRefPtr<Structure> structure,ObjectPrototype * objectPrototype,Structure * prototypeFunctionStructure)35 ObjectConstructor::ObjectConstructor(ExecState* exec, PassRefPtr<Structure> structure, ObjectPrototype* objectPrototype, Structure* prototypeFunctionStructure)
36 : InternalFunction(&exec->globalData(), structure, Identifier(exec, "Object"))
37 {
38 // ECMA 15.2.3.1
39 putDirectWithoutTransition(exec->propertyNames().prototype, objectPrototype, DontEnum | DontDelete | ReadOnly);
40
41 // no. of arguments for constructor
42 putDirectWithoutTransition(exec->propertyNames().length, jsNumber(exec, 1), ReadOnly | DontEnum | DontDelete);
43
44 putDirectFunctionWithoutTransition(exec, new (exec) NativeFunctionWrapper(exec, prototypeFunctionStructure, 1, exec->propertyNames().getPrototypeOf, objectConstructorGetPrototypeOf), DontEnum);
45 }
46
47 // ECMA 15.2.2
constructObject(ExecState * exec,const ArgList & args)48 static ALWAYS_INLINE JSObject* constructObject(ExecState* exec, const ArgList& args)
49 {
50 JSValue arg = args.at(0);
51 if (arg.isUndefinedOrNull())
52 return new (exec) JSObject(exec->lexicalGlobalObject()->emptyObjectStructure());
53 return arg.toObject(exec);
54 }
55
constructWithObjectConstructor(ExecState * exec,JSObject *,const ArgList & args)56 static JSObject* constructWithObjectConstructor(ExecState* exec, JSObject*, const ArgList& args)
57 {
58 return constructObject(exec, args);
59 }
60
getConstructData(ConstructData & constructData)61 ConstructType ObjectConstructor::getConstructData(ConstructData& constructData)
62 {
63 constructData.native.function = constructWithObjectConstructor;
64 return ConstructTypeHost;
65 }
66
callObjectConstructor(ExecState * exec,JSObject *,JSValue,const ArgList & args)67 static JSValue JSC_HOST_CALL callObjectConstructor(ExecState* exec, JSObject*, JSValue, const ArgList& args)
68 {
69 return constructObject(exec, args);
70 }
71
getCallData(CallData & callData)72 CallType ObjectConstructor::getCallData(CallData& callData)
73 {
74 callData.native.function = callObjectConstructor;
75 return CallTypeHost;
76 }
77
objectConstructorGetPrototypeOf(ExecState * exec,JSObject *,JSValue,const ArgList & args)78 JSValue JSC_HOST_CALL objectConstructorGetPrototypeOf(ExecState* exec, JSObject*, JSValue, const ArgList& args)
79 {
80 if (!args.at(0).isObject())
81 return throwError(exec, TypeError, "Requested prototype of a value that is not an object.");
82 return asObject(args.at(0))->prototype();
83 }
84
85 } // namespace JSC
86