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