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.ustring().rep()))

    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.ustring().rep());

    64     if (!entry.isNull()) {

    65         descriptor.setDescriptor(registerAt(entry.getIndex()).jsValue(), entry.getAttributes() | DontDelete);

    66         return true;

    67     }

    68     return false;

    69 }

    70 

    71 } // namespace JSC