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Diffstat (limited to 'src/3rdparty/javascriptcore/JavaScriptCore/runtime/JSPropertyNameIterator.h')
-rw-r--r-- | src/3rdparty/javascriptcore/JavaScriptCore/runtime/JSPropertyNameIterator.h | 113 |
1 files changed, 113 insertions, 0 deletions
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/JSPropertyNameIterator.h b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/JSPropertyNameIterator.h new file mode 100644 index 000000000..d2849a891 --- /dev/null +++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/JSPropertyNameIterator.h @@ -0,0 +1,113 @@ +/* + * 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 JSPropertyNameIterator_h +#define JSPropertyNameIterator_h + +#include "JSObject.h" +#include "JSString.h" +#include "PropertyNameArray.h" + +namespace JSC { + + class Identifier; + class JSObject; + + class JSPropertyNameIterator : public JSCell { + public: + static JSPropertyNameIterator* create(ExecState*, JSValue); + + virtual ~JSPropertyNameIterator(); + + virtual void markChildren(MarkStack&); + + JSValue next(ExecState*); + void invalidate(); + + static PassRefPtr<Structure> createStructure(JSValue prototype) + { + return Structure::create(prototype, TypeInfo(CompoundType)); + } + private: + JSPropertyNameIterator(ExecState*); + JSPropertyNameIterator(ExecState*, JSObject*, PassRefPtr<PropertyNameArrayData> propertyNameArrayData); + + JSObject* m_object; + RefPtr<PropertyNameArrayData> m_data; + PropertyNameArrayData::const_iterator m_position; + PropertyNameArrayData::const_iterator m_end; + }; + +inline JSPropertyNameIterator::JSPropertyNameIterator(ExecState* exec) + : JSCell(exec->globalData().propertyNameIteratorStructure.get()) + , m_object(0) + , m_position(0) + , m_end(0) +{ +} + +inline JSPropertyNameIterator::JSPropertyNameIterator(ExecState* exec, JSObject* object, PassRefPtr<PropertyNameArrayData> propertyNameArrayData) + : JSCell(exec->globalData().propertyNameIteratorStructure.get()) + , m_object(object) + , m_data(propertyNameArrayData) + , m_position(m_data->begin()) + , m_end(m_data->end()) +{ +} + +inline JSPropertyNameIterator* JSPropertyNameIterator::create(ExecState* exec, JSValue v) +{ + if (v.isUndefinedOrNull()) + return new (exec) JSPropertyNameIterator(exec); + + JSObject* o = v.toObject(exec); + PropertyNameArray propertyNames(exec); + o->getPropertyNames(exec, propertyNames); + return new (exec) JSPropertyNameIterator(exec, o, propertyNames.releaseData()); +} + +inline JSValue JSPropertyNameIterator::next(ExecState* exec) +{ + if (m_position == m_end) + return JSValue(); + + if (m_data->cachedStructure() == m_object->structure() && m_data->cachedPrototypeChain() == m_object->structure()->prototypeChain(exec)) + return jsOwnedString(exec, (*m_position++).ustring()); + + do { + if (m_object->hasProperty(exec, *m_position)) + return jsOwnedString(exec, (*m_position++).ustring()); + m_position++; + } while (m_position != m_end); + + return JSValue(); +} + +} // namespace JSC + +#endif // JSPropertyNameIterator_h |