author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Tue, 02 Feb 2010 00:43:10 +0200 | |
changeset 3 | 41300fa6a67c |
parent 0 | 1918ee327afb |
child 30 | 5dc02b23752f |
permissions | -rw-r--r-- |
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/* |
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* Copyright (C) 2008, 2009 Apple Inc. All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in the |
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* documentation and/or other materials provided with the distribution. |
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* 3. Neither the name of Apple Computer, Inc. ("Apple") nor the names of |
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* its contributors may be used to endorse or promote products derived |
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* from this software without specific prior written permission. |
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* |
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* THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY |
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
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* DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY |
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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*/ |
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#include "config.h" |
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#include "JSPropertyNameIterator.h" |
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#include "JSGlobalObject.h" |
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namespace JSC { |
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ASSERT_CLASS_FITS_IN_CELL(JSPropertyNameIterator); |
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JSPropertyNameIterator* JSPropertyNameIterator::create(ExecState* exec, JSObject* o) |
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{ |
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ASSERT(!o->structure()->enumerationCache() || |
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o->structure()->enumerationCache()->cachedStructure() != o->structure() || |
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o->structure()->enumerationCache()->cachedPrototypeChain() != o->structure()->prototypeChain(exec)); |
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PropertyNameArray propertyNames(exec); |
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o->getPropertyNames(exec, propertyNames); |
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41300fa6a67c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
0
diff
changeset
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size_t numCacheableSlots = 0; |
41300fa6a67c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
0
diff
changeset
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if (!o->structure()->hasNonEnumerableProperties() && !o->structure()->hasAnonymousSlots() && |
41300fa6a67c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
0
diff
changeset
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!o->structure()->isUncacheableDictionary() && !o->structure()->typeInfo().overridesGetPropertyNames()) |
41300fa6a67c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
0
diff
changeset
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numCacheableSlots = o->structure()->propertyStorageSize(); |
41300fa6a67c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
0
diff
changeset
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41300fa6a67c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
0
diff
changeset
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JSPropertyNameIterator* jsPropertyNameIterator = new (exec) JSPropertyNameIterator(exec, propertyNames.data(), numCacheableSlots); |
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if (o->structure()->isDictionary()) |
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return jsPropertyNameIterator; |
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if (o->structure()->typeInfo().overridesGetPropertyNames()) |
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return jsPropertyNameIterator; |
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size_t count = normalizePrototypeChain(exec, o); |
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StructureChain* structureChain = o->structure()->prototypeChain(exec); |
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RefPtr<Structure>* structure = structureChain->head(); |
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for (size_t i = 0; i < count; ++i) { |
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if (structure[i]->typeInfo().overridesGetPropertyNames()) |
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return jsPropertyNameIterator; |
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} |
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jsPropertyNameIterator->setCachedPrototypeChain(structureChain); |
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jsPropertyNameIterator->setCachedStructure(o->structure()); |
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o->structure()->setEnumerationCache(jsPropertyNameIterator); |
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return jsPropertyNameIterator; |
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} |
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JSValue JSPropertyNameIterator::get(ExecState* exec, JSObject* base, size_t i) |
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{ |
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JSValue& identifier = m_jsStrings[i]; |
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if (m_cachedStructure == base->structure() && m_cachedPrototypeChain == base->structure()->prototypeChain(exec)) |
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return identifier; |
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if (!base->hasProperty(exec, Identifier(exec, asString(identifier)->value()))) |
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return JSValue(); |
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return identifier; |
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} |
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void JSPropertyNameIterator::markChildren(MarkStack& markStack) |
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{ |
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markStack.appendValues(m_jsStrings.get(), m_jsStringsSize, MayContainNullValues); |
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} |
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} // namespace JSC |