--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/JavaScriptCore/runtime/JSNotAnObject.h Fri Sep 17 09:02:29 2010 +0300
@@ -0,0 +1,101 @@
+/*
+ * Copyright (C) 2008, 2009 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of Apple Computer, Inc. ("Apple") nor the names of
+ * its contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef JSNotAnObject_h
+#define JSNotAnObject_h
+
+#include "JSObject.h"
+
+namespace JSC {
+
+ class JSNotAnObjectErrorStub : public JSObject {
+ public:
+ JSNotAnObjectErrorStub(ExecState* exec, bool isNull)
+ : JSObject(exec->globalData().notAnObjectErrorStubStructure)
+ , m_isNull(isNull)
+ {
+ }
+
+ bool isNull() const { return m_isNull; }
+
+ private:
+ virtual bool isNotAnObjectErrorStub() const { return true; }
+
+ bool m_isNull;
+ };
+
+ // This unholy class is used to allow us to avoid multiple exception checks
+ // in certain SquirrelFish bytecodes -- effectively it just silently consumes
+ // any operations performed on the result of a failed toObject call.
+ class JSNotAnObject : public JSObject {
+ public:
+ JSNotAnObject(ExecState* exec, JSNotAnObjectErrorStub* exception)
+ : JSObject(exec->globalData().notAnObjectStructure)
+ , m_exception(exception)
+ {
+ }
+
+ static PassRefPtr<Structure> createStructure(JSValue prototype)
+ {
+ return Structure::create(prototype, TypeInfo(ObjectType, StructureFlags), AnonymousSlotCount);
+ }
+
+ private:
+
+ static const unsigned StructureFlags = OverridesGetOwnPropertySlot | OverridesMarkChildren | OverridesGetPropertyNames | JSObject::StructureFlags;
+
+ // JSValue methods
+ virtual JSValue toPrimitive(ExecState*, PreferredPrimitiveType) const;
+ virtual bool getPrimitiveNumber(ExecState*, double& number, JSValue&);
+ virtual bool toBoolean(ExecState*) const;
+ virtual double toNumber(ExecState*) const;
+ virtual UString toString(ExecState*) const;
+ virtual JSObject* toObject(ExecState*) const;
+
+ // Marking
+ virtual void markChildren(MarkStack&);
+
+ // JSObject methods
+ virtual bool getOwnPropertySlot(ExecState*, const Identifier& propertyName, PropertySlot&);
+ virtual bool getOwnPropertySlot(ExecState*, unsigned propertyName, PropertySlot&);
+ virtual bool getOwnPropertyDescriptor(ExecState*, const Identifier&, PropertyDescriptor&);
+
+ virtual void put(ExecState*, const Identifier& propertyName, JSValue, PutPropertySlot&);
+ virtual void put(ExecState*, unsigned propertyName, JSValue);
+
+ virtual bool deleteProperty(ExecState*, const Identifier& propertyName);
+ virtual bool deleteProperty(ExecState*, unsigned propertyName);
+
+ virtual void getOwnPropertyNames(ExecState*, PropertyNameArray&, EnumerationMode mode = ExcludeDontEnumProperties);
+
+ JSNotAnObjectErrorStub* m_exception;
+ };
+
+} // namespace JSC
+
+#endif // JSNotAnObject_h