JavaScriptCore-7600.1.4.9.tar.gz

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

diff --git a/runtime/JSArrayIterator.h b/runtime/JSArrayIterator.h
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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 JSArrayIterator_h
+#define JSArrayIterator_h
+
+#include "JSObject.h"
+
+namespace JSC {
+
+enum ArrayIterationKind : uint32_t {
+    ArrayIterateKey,
+    ArrayIterateValue,
+    ArrayIterateKeyValue,
+    ArrayIterateSparseTag = 4,
+    ArrayIterateSparseKey,
+    ArrayIterateSparseValue,
+    ArrayIterateSparseKeyValue
+};
+
+class JSArrayIterator : 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 JSArrayIterator* create(ExecState* exec, Structure* structure, ArrayIterationKind kind, JSObject* iteratedObject)
+    {
+        VM& vm = exec->vm();
+        JSArrayIterator* instance = new (NotNull, allocateCell<JSArrayIterator>(vm.heap)) JSArrayIterator(vm, structure);
+        instance->finishCreation(vm, structure->globalObject(), kind, iteratedObject);
+        return instance;
+    }
+
+    ArrayIterationKind iterationKind() const { return m_iterationKind; }
+    JSObject* iteratedObject() const { return m_iteratedObject.get(); }
+    size_t nextIndex() const { return m_nextIndex; }
+    void setNextIndex(size_t nextIndex) { m_nextIndex = nextIndex; }
+    void finish() { m_nextIndex = std::numeric_limits<uint32_t>::max(); }
+    
+    using JSNonFinalObject::arrayStorageOrNull;
+    static ptrdiff_t offsetOfIterationKind() { return OBJECT_OFFSETOF(JSArrayIterator, m_iterationKind); }
+    static ptrdiff_t offsetOfIteratedObject() { return OBJECT_OFFSETOF(JSArrayIterator, m_iteratedObject); }
+    static ptrdiff_t offsetOfNextIndex() { return OBJECT_OFFSETOF(JSArrayIterator, m_nextIndex); }
+
+private:
+
+    static const unsigned StructureFlags = Base::StructureFlags | OverridesVisitChildren;
+
+    JSArrayIterator(VM& vm, Structure* structure)
+        : Base(vm, structure)
+        , m_nextIndex(0)
+    {
+    }
+
+    void finishCreation(VM&, JSGlobalObject*, ArrayIterationKind, JSObject* iteratedObject);
+    static void visitChildren(JSCell*, SlotVisitor&);
+    
+    ArrayIterationKind m_iterationKind;
+    WriteBarrier<JSObject> m_iteratedObject;
+    uint32_t m_nextIndex;
+};
+
+}
+
+#endif // !defined(JSArrayIterator_h)