JavaScriptCore-1097.13.tar.gz

[apple/javascriptcore.git] / runtime / JSPropertyNameIterator.h

diff --git a/runtime/JSPropertyNameIterator.h b/runtime/JSPropertyNameIterator.h
index ebb81b3925d510b83175112a10f3d23c15b2a900..5b65e59f25c7222f541d8bdf6a960ab50430f057 100644 (file)
--- a/runtime/JSPropertyNameIterator.h
+++ b/runtime/JSPropertyNameIterator.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2008 Apple Inc. All rights reserved.
+ * 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
@@ -31,85 +31,98 @@
 
 #include "JSObject.h"
 #include "JSString.h"
+#include "Operations.h"
 #include "PropertyNameArray.h"
 
 namespace JSC {
 
     class Identifier;
     class JSObject;
+    class LLIntOffsetsExtractor;
 
     class JSPropertyNameIterator : public JSCell {
-    public:
-        static JSPropertyNameIterator* create(ExecState*, JSValuePtr);
-
-        virtual ~JSPropertyNameIterator();
-
-        virtual JSValuePtr toPrimitive(ExecState*, PreferredPrimitiveType) const;
-        virtual bool getPrimitiveNumber(ExecState*, double&, JSValuePtr&);
-        virtual bool toBoolean(ExecState*) const;
-        virtual double toNumber(ExecState*) const;
-        virtual UString toString(ExecState*) const;
-        virtual JSObject* toObject(ExecState*) const;
+        friend class JIT;
 
-        virtual void mark();
-
-        JSValuePtr next(ExecState*);
-        void invalidate();
+    public:
+        typedef JSCell Base;
+
+        static JSPropertyNameIterator* create(ExecState*, JSObject*);
+        static JSPropertyNameIterator* create(ExecState* exec, PropertyNameArrayData* propertyNameArrayData, size_t numCacheableSlot)
+        {
+            JSPropertyNameIterator* iterator = new (NotNull, allocateCell<JSPropertyNameIterator>(*exec->heap())) JSPropertyNameIterator(exec, propertyNameArrayData, numCacheableSlot);
+            iterator->finishCreation(exec, propertyNameArrayData);
+            return iterator;
+        }
+
+        static void destroy(JSCell*);
+       
+        static Structure* createStructure(JSGlobalData& globalData, JSGlobalObject* globalObject, JSValue prototype)
+        {
+            return Structure::create(globalData, globalObject, prototype, TypeInfo(CompoundType, OverridesVisitChildren), &s_info);
+        }
+
+        static void visitChildren(JSCell*, SlotVisitor&);
+
+        bool getOffset(size_t i, int& offset)
+        {
+            if (i >= m_numCacheableSlots)
+                return false;
+            offset = i;
+            return true;
+        }
+
+        JSValue get(ExecState*, JSObject*, size_t i);
+        size_t size() { return m_jsStringsSize; }
+
+        void setCachedStructure(JSGlobalData& globalData, Structure* structure)
+        {
+            ASSERT(!m_cachedStructure);
+            ASSERT(structure);
+            m_cachedStructure.set(globalData, this, structure);
+        }
+        Structure* cachedStructure() { return m_cachedStructure.get(); }
+
+        void setCachedPrototypeChain(JSGlobalData& globalData, StructureChain* cachedPrototypeChain) { m_cachedPrototypeChain.set(globalData, this, cachedPrototypeChain); }
+        StructureChain* cachedPrototypeChain() { return m_cachedPrototypeChain.get(); }
+        
+        static const ClassInfo s_info;
+
+    protected:
+        void finishCreation(ExecState* exec, PropertyNameArrayData* propertyNameArrayData)
+        {
+            Base::finishCreation(exec->globalData());
+            PropertyNameArrayData::PropertyNameVector& propertyNameVector = propertyNameArrayData->propertyNameVector();
+            for (size_t i = 0; i < m_jsStringsSize; ++i)
+                m_jsStrings[i].set(exec->globalData(), this, jsOwnedString(exec, propertyNameVector[i].ustring()));
+        }
 
     private:
-        JSPropertyNameIterator();
-        JSPropertyNameIterator(JSObject*, PassRefPtr<PropertyNameArrayData> propertyNameArrayData);
-
-        JSObject* m_object;
-        RefPtr<PropertyNameArrayData> m_data;
-        PropertyNameArrayData::const_iterator m_position;
-        PropertyNameArrayData::const_iterator m_end;
+        friend class LLIntOffsetsExtractor;
+        
+        JSPropertyNameIterator(ExecState*, PropertyNameArrayData* propertyNameArrayData, size_t numCacheableSlot);
+
+        WriteBarrier<Structure> m_cachedStructure;
+        WriteBarrier<StructureChain> m_cachedPrototypeChain;
+        uint32_t m_numCacheableSlots;
+        uint32_t m_jsStringsSize;
+        OwnArrayPtr<WriteBarrier<Unknown> > m_jsStrings;
     };
 
-inline JSPropertyNameIterator::JSPropertyNameIterator()
-    : JSCell(0)
-    , m_object(0)
-    , m_position(0)
-    , m_end(0)
-{
-}
-
-inline JSPropertyNameIterator::JSPropertyNameIterator(JSObject* object, PassRefPtr<PropertyNameArrayData> propertyNameArrayData)
-    : JSCell(0)
-    , m_object(object)
-    , m_data(propertyNameArrayData)
-    , m_position(m_data->begin())
-    , m_end(m_data->end())
-{
-}
-
-inline JSPropertyNameIterator* JSPropertyNameIterator::create(ExecState* exec, JSValuePtr v)
-{
-    if (v.isUndefinedOrNull())
-        return new (exec) JSPropertyNameIterator;
-
-    JSObject* o = v.toObject(exec);
-    PropertyNameArray propertyNames(exec);
-    o->getPropertyNames(exec, propertyNames);
-    return new (exec) JSPropertyNameIterator(o, propertyNames.releaseData());
-}
-
-inline JSValuePtr JSPropertyNameIterator::next(ExecState* exec)
-{
-    if (m_position == m_end)
-        return noValue();
-
-    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 noValue();
-}
+    inline void Structure::setEnumerationCache(JSGlobalData& globalData, JSPropertyNameIterator* enumerationCache)
+    {
+        ASSERT(!isDictionary());
+        m_enumerationCache.set(globalData, this, enumerationCache);
+    }
+
+    inline JSPropertyNameIterator* Structure::enumerationCache()
+    {
+        return m_enumerationCache.get();
+    }
+
+    ALWAYS_INLINE JSPropertyNameIterator* Register::propertyNameIterator() const
+    {
+        return jsCast<JSPropertyNameIterator*>(jsValue().asCell());
+    }
 
 } // namespace JSC