X-Git-Url: https://git.saurik.com/apple/javascriptcore.git/blobdiff_plain/4be4e30906bcb8ee30b4d189205cb70bad6707ce..81345200c95645a1b0d2635520f96ad55dfde63f:/runtime/JSArgumentsIterator.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 JSArgumentsIterator_h
+#define JSArgumentsIterator_h
+
+#include "Arguments.h"
+
+namespace JSC {
+
+class JSArgumentsIterator : 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 JSArgumentsIterator* create(VM& vm, Structure* structure, Arguments* arguments)
+    {
+        JSArgumentsIterator* instance = new (NotNull, allocateCell<JSArgumentsIterator>(vm.heap)) JSArgumentsIterator(vm, structure);
+        instance->finishCreation(vm, arguments);
+        return instance;
+    }
+
+    bool next(CallFrame* callFrame, JSValue& value)
+    {
+        if (m_nextIndex >= m_arguments->length(callFrame))
+            return false;
+        value = m_arguments->tryGetArgument(m_nextIndex++);
+        if (!value)
+            value = jsUndefined();
+        return true;
+    }
+
+private:
+
+    static const unsigned StructureFlags = Base::StructureFlags;
+
+    JSArgumentsIterator(VM& vm, Structure* structure)
+        : Base(vm, structure)
+        , m_nextIndex(0)
+    {
+    }
+
+    void finishCreation(VM&, Arguments*);
+    
+    WriteBarrier<Arguments> m_arguments;
+    size_t m_nextIndex;
+};
+
+}
+
+#endif // !defined(JSArgumentsIterator_h)