1 | /* |
2 | * Copyright (C) 2008, 2009 Apple Inc. All rights reserved. |
3 | * |
4 | * Redistribution and use in source and binary forms, with or without |
5 | * modification, are permitted provided that the following conditions |
6 | * are met: |
7 | * |
8 | * 1. Redistributions of source code must retain the above copyright |
9 | * notice, this list of conditions and the following disclaimer. |
10 | * 2. Redistributions in binary form must reproduce the above copyright |
11 | * notice, this list of conditions and the following disclaimer in the |
12 | * documentation and/or other materials provided with the distribution. |
13 | * 3. Neither the name of Apple Computer, Inc. ("Apple") nor the names of |
14 | * its contributors may be used to endorse or promote products derived |
15 | * from this software without specific prior written permission. |
16 | * |
17 | * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY |
18 | * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
19 | * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
20 | * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY |
21 | * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
22 | * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
23 | * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
24 | * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
27 | */ |
28 | |
29 | #ifndef JSNotAnObject_h |
30 | #define JSNotAnObject_h |
31 | |
32 | #include "JSObject.h" |
33 | |
34 | namespace JSC { |
35 | |
36 | class JSNotAnObjectErrorStub : public JSObject { |
37 | public: |
38 | JSNotAnObjectErrorStub(ExecState* exec, bool isNull) |
39 | : JSObject(exec->globalData().notAnObjectErrorStubStructure) |
40 | , m_isNull(isNull) |
41 | { |
42 | } |
43 | |
44 | bool isNull() const { return m_isNull; } |
45 | |
46 | private: |
47 | virtual bool isNotAnObjectErrorStub() const { return true; } |
48 | |
49 | bool m_isNull; |
50 | }; |
51 | |
52 | // This unholy class is used to allow us to avoid multiple exception checks |
53 | // in certain SquirrelFish bytecodes -- effectively it just silently consumes |
54 | // any operations performed on the result of a failed toObject call. |
55 | class JSNotAnObject : public JSObject { |
56 | public: |
57 | JSNotAnObject(ExecState* exec, JSNotAnObjectErrorStub* exception) |
58 | : JSObject(exec->globalData().notAnObjectStructure) |
59 | , m_exception(exception) |
60 | { |
61 | } |
62 | |
63 | static PassRefPtr<Structure> createStructure(JSValue prototype) |
64 | { |
65 | return Structure::create(prototype, typeInfo: TypeInfo(ObjectType, StructureFlags)); |
66 | } |
67 | |
68 | private: |
69 | |
70 | static const unsigned StructureFlags = OverridesGetOwnPropertySlot | OverridesMarkChildren | OverridesGetPropertyNames | JSObject::StructureFlags; |
71 | |
72 | // JSValue methods |
73 | virtual JSValue toPrimitive(ExecState*, PreferredPrimitiveType) const; |
74 | virtual bool getPrimitiveNumber(ExecState*, double& number, JSValue&); |
75 | virtual bool toBoolean(ExecState*) const; |
76 | virtual double toNumber(ExecState*) const; |
77 | virtual UString toString(ExecState*) const; |
78 | virtual JSObject* toObject(ExecState*) const; |
79 | |
80 | // Marking |
81 | virtual void markChildren(MarkStack&); |
82 | |
83 | // JSObject methods |
84 | virtual bool getOwnPropertySlot(ExecState*, const Identifier& propertyName, PropertySlot&); |
85 | virtual bool getOwnPropertySlot(ExecState*, unsigned propertyName, PropertySlot&); |
86 | virtual bool getOwnPropertyDescriptor(ExecState*, const Identifier&, PropertyDescriptor&); |
87 | |
88 | virtual void put(ExecState*, const Identifier& propertyName, JSValue, PutPropertySlot&); |
89 | virtual void put(ExecState*, unsigned propertyName, JSValue); |
90 | |
91 | virtual bool deleteProperty(ExecState*, const Identifier& propertyName); |
92 | virtual bool deleteProperty(ExecState*, unsigned propertyName); |
93 | |
94 | virtual void getOwnPropertyNames(ExecState*, PropertyNameArray&, EnumerationMode mode = ExcludeDontEnumProperties); |
95 | |
96 | JSNotAnObjectErrorStub* m_exception; |
97 | }; |
98 | |
99 | } // namespace JSC |
100 | |
101 | #endif // JSNotAnObject_h |
102 | |