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      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  * 1. Redistributions of source code must retain the above copyright
      8  *    notice, this list of conditions and the following disclaimer.
      9  * 2. Redistributions in binary form must reproduce the above copyright
     10  *    notice, this list of conditions and the following disclaimer in the
     11  *    documentation and/or other materials provided with the distribution.
     12  *
     13  * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
     14  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     16  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
     17  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
     18  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
     19  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
     20  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
     21  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     23  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     24  */
     25 
     26 #ifndef JSStaticScopeObject_h
     27 #define JSStaticScopeObject_h
     28 
     29 #include "JSVariableObject.h"
     30 
     31 namespace JSC{
     32 
     33     class JSStaticScopeObject : public JSVariableObject {
     34     public:
     35         JSStaticScopeObject(ExecState* exec, const Identifier& ident, JSValue value, unsigned attributes)
     36             : JSVariableObject(exec->globalData(), exec->globalData().staticScopeStructure.get(), &m_symbolTable, reinterpret_cast<Register*>(&m_registerStore + 1))
     37         {
     38             m_registerStore.set(exec->globalData(), this, value);
     39             symbolTable().add(ident.impl(), SymbolTableEntry(-1, attributes));
     40         }
     41 
     42         virtual void markChildren(MarkStack&);
     43         bool isDynamicScope(bool& requiresDynamicChecks) const;
     44         virtual JSObject* toThisObject(ExecState*) const;
     45         virtual JSValue toStrictThisObject(ExecState*) const;
     46         virtual bool getOwnPropertySlot(ExecState*, const Identifier&, PropertySlot&);
     47         virtual void put(ExecState*, const Identifier&, JSValue, PutPropertySlot&);
     48         void putWithAttributes(ExecState*, const Identifier&, JSValue, unsigned attributes);
     49 
     50         static Structure* createStructure(JSGlobalData& globalData, JSValue proto) { return Structure::create(globalData, proto, TypeInfo(ObjectType, StructureFlags), AnonymousSlotCount, &s_info); }
     51 
     52     protected:
     53         static const unsigned StructureFlags = OverridesGetOwnPropertySlot | NeedsThisConversion | OverridesMarkChildren | OverridesGetPropertyNames | JSVariableObject::StructureFlags;
     54 
     55     private:
     56         SymbolTable m_symbolTable;
     57         WriteBarrier<Unknown> m_registerStore;
     58     };
     59 
     60 }
     61 
     62 #endif // JSStaticScopeObject_h
     63