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      1 /*
      2  * Copyright (C) 2007, 2008 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 #include "config.h"
     30 #include "JSVariableObject.h"
     31 
     32 #include "PropertyNameArray.h"
     33 #include "PropertyDescriptor.h"
     34 
     35 namespace JSC {
     36 
     37 bool JSVariableObject::deleteProperty(ExecState* exec, const Identifier& propertyName)
     38 {
     39     if (symbolTable().contains(propertyName.impl()))
     40         return false;
     41 
     42     return JSObject::deleteProperty(exec, propertyName);
     43 }
     44 
     45 void JSVariableObject::getOwnPropertyNames(ExecState* exec, PropertyNameArray& propertyNames, EnumerationMode mode)
     46 {
     47     SymbolTable::const_iterator end = symbolTable().end();
     48     for (SymbolTable::const_iterator it = symbolTable().begin(); it != end; ++it) {
     49         if (!(it->second.getAttributes() & DontEnum) || (mode == IncludeDontEnumProperties))
     50             propertyNames.add(Identifier(exec, it->first.get()));
     51     }
     52 
     53     JSObject::getOwnPropertyNames(exec, propertyNames, mode);
     54 }
     55 
     56 bool JSVariableObject::isVariableObject() const
     57 {
     58     return true;
     59 }
     60 
     61 bool JSVariableObject::symbolTableGet(const Identifier& propertyName, PropertyDescriptor& descriptor)
     62 {
     63     SymbolTableEntry entry = symbolTable().inlineGet(propertyName.impl());
     64     if (!entry.isNull()) {
     65         descriptor.setDescriptor(registerAt(entry.getIndex()).get(), entry.getAttributes() | DontDelete);
     66         return true;
     67     }
     68     return false;
     69 }
     70 
     71 } // namespace JSC
     72