| 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 | // This unholy class is used to allow us to avoid multiple exception checks
|
|---|
| 37 | // in certain SquirrelFish bytecodes -- effectively it just silently consumes
|
|---|
| 38 | // any operations performed on the result of a failed toObject call.
|
|---|
| 39 | class JSNotAnObject : public JSObject {
|
|---|
| 40 | public:
|
|---|
| 41 | JSNotAnObject(ExecState* exec)
|
|---|
| 42 | : JSObject(exec->globalData().notAnObjectStructure)
|
|---|
| 43 | {
|
|---|
| 44 | }
|
|---|
| 45 |
|
|---|
| 46 | static PassRefPtr<Structure> createStructure(JSValue prototype)
|
|---|
| 47 | {
|
|---|
| 48 | return Structure::create(prototype, TypeInfo(ObjectType, StructureFlags), AnonymousSlotCount);
|
|---|
| 49 | }
|
|---|
| 50 |
|
|---|
| 51 | private:
|
|---|
| 52 |
|
|---|
| 53 | static const unsigned StructureFlags = OverridesGetOwnPropertySlot | OverridesGetPropertyNames | JSObject::StructureFlags;
|
|---|
| 54 |
|
|---|
| 55 | // JSValue methods
|
|---|
| 56 | virtual JSValue toPrimitive(ExecState*, PreferredPrimitiveType) const;
|
|---|
| 57 | virtual bool getPrimitiveNumber(ExecState*, double& number, JSValue&);
|
|---|
| 58 | virtual bool toBoolean(ExecState*) const;
|
|---|
| 59 | virtual double toNumber(ExecState*) const;
|
|---|
| 60 | virtual UString toString(ExecState*) const;
|
|---|
| 61 | virtual JSObject* toObject(ExecState*) const;
|
|---|
| 62 |
|
|---|
| 63 | // JSObject methods
|
|---|
| 64 | virtual bool getOwnPropertySlot(ExecState*, const Identifier& propertyName, PropertySlot&);
|
|---|
| 65 | virtual bool getOwnPropertySlot(ExecState*, unsigned propertyName, PropertySlot&);
|
|---|
| 66 | virtual bool getOwnPropertyDescriptor(ExecState*, const Identifier&, PropertyDescriptor&);
|
|---|
| 67 |
|
|---|
| 68 | virtual void put(ExecState*, const Identifier& propertyName, JSValue, PutPropertySlot&);
|
|---|
| 69 | virtual void put(ExecState*, unsigned propertyName, JSValue);
|
|---|
| 70 |
|
|---|
| 71 | virtual bool deleteProperty(ExecState*, const Identifier& propertyName);
|
|---|
| 72 | virtual bool deleteProperty(ExecState*, unsigned propertyName);
|
|---|
| 73 |
|
|---|
| 74 | virtual void getOwnPropertyNames(ExecState*, PropertyNameArray&, EnumerationMode mode = ExcludeDontEnumProperties);
|
|---|
| 75 | };
|
|---|
| 76 |
|
|---|
| 77 | } // namespace JSC
|
|---|
| 78 |
|
|---|
| 79 | #endif // JSNotAnObject_h
|
|---|
