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/*
* Copyright (C) 2013 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.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``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 INC. OR
* 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 JSMapIterator_h
#define JSMapIterator_h
#include "JSMap.h"
#include "JSObject.h"
#include "MapData.h"
namespace JSC {
enum MapIterationKind : uint32_t {
MapIterateKey,
MapIterateValue,
MapIterateKeyValue,
};
class JSMapIterator : public JSNonFinalObject {
public:
typedef JSNonFinalObject Base;
DECLARE_EXPORT_INFO;
static Structure* createStructure(VM& vm, JSGlobalObject* globalObject, JSValue prototype)
{
return Structure::create(vm, globalObject, prototype, TypeInfo(ObjectType, StructureFlags), info());
}
static JSMapIterator* create(VM& vm, Structure* structure, JSMap* iteratedObject, MapIterationKind kind)
{
JSMapIterator* instance = new (NotNull, allocateCell<JSMapIterator>(vm.heap)) JSMapIterator(vm, structure, iteratedObject, kind);
instance->finishCreation(vm, iteratedObject);
return instance;
}
bool next(CallFrame* callFrame, JSValue& value)
{
WTF::KeyValuePair<JSValue, JSValue> pair;
if (!m_iterator.next(pair))
return false;
if (m_kind == MapIterateValue)
value = pair.value;
else if (m_kind == MapIterateKey)
value = pair.key;
else
value = createPair(callFrame, pair.key, pair.value);
return true;
}
bool nextKeyValue(JSValue& key, JSValue& value)
{
WTF::KeyValuePair<JSValue, JSValue> pair;
if (!m_iterator.next(pair))
return false;
key = pair.key;
value = pair.value;
return true;
}
void finish()
{
m_iterator.finish();
}
MapIterationKind kind() const { return m_kind; }
JSValue iteratedValue() const { return m_map.get(); }
JSMapIterator* clone(ExecState*);
JSMap::MapData::IteratorData* iteratorData()
{
return &m_iterator;
}
private:
JSMapIterator(VM& vm, Structure* structure, JSMap* iteratedObject, MapIterationKind kind)
: Base(vm, structure)
, m_iterator(iteratedObject->m_mapData.createIteratorData(this))
, m_kind(kind)
{
}
JS_EXPORT_PRIVATE void finishCreation(VM&, JSMap*);
JSValue createPair(CallFrame*, JSValue, JSValue);
static void visitChildren(JSCell*, SlotVisitor&);
WriteBarrier<JSMap> m_map;
JSMap::MapData::IteratorData m_iterator;
MapIterationKind m_kind;
};
STATIC_ASSERT_IS_TRIVIALLY_DESTRUCTIBLE(JSMapIterator);
}
#endif // !defined(JSMapIterator_h)
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