1 files changed, 133 insertions, 0 deletions
diff --git a/Source/JavaScriptCore/runtime/JSByteArray.h b/Source/JavaScriptCore/runtime/JSByteArray.h
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+++ b/Source/JavaScriptCore/runtime/JSByteArray.h
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+/*
+ * Copyright (C) 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.
+ *
+ * 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 JSByteArray_h
+#define JSByteArray_h
+
+#include "JSObject.h"
+
+#include <wtf/ByteArray.h>
+
+namespace JSC {
+
+    class JSByteArray : public JSNonFinalObject {
+        friend class JSGlobalData;
+    public:
+        typedef JSNonFinalObject Base;
+
+        bool canAccessIndex(unsigned i) { return i < m_storage->length(); }
+        JSValue getIndex(ExecState*, unsigned i)
+        {
+            ASSERT(canAccessIndex(i));
+            return jsNumber(m_storage->data()[i]);
+        }
+
+        void setIndex(unsigned i, int value)
+        {
+            ASSERT(canAccessIndex(i));
+            if (value & ~0xFF) {
+                if (value < 0)
+                    value = 0;
+                else
+                    value = 255;
+            }
+            m_storage->data()[i] = static_cast<unsigned char>(value);
+        }
+        
+        void setIndex(unsigned i, double value)
+        {
+            ASSERT(canAccessIndex(i));
+            if (!(value > 0)) // Clamp NaN to 0
+                value = 0;
+            else if (value > 255)
+                value = 255;
+            m_storage->data()[i] = static_cast<unsigned char>(value + 0.5);
+        }
+        
+        void setIndex(ExecState* exec, unsigned i, JSValue value)
+        {
+            double byteValue = value.toNumber(exec);
+            if (exec->hadException())
+                return;
+            if (canAccessIndex(i))
+                setIndex(i, byteValue);
+        }
+
+    private:
+        JSByteArray(ExecState*, Structure*, ByteArray* storage);
+        
+    public:
+        static JSByteArray* create(ExecState* exec, Structure* structure, ByteArray* storage)
+        {
+            JSByteArray* array = new (NotNull, allocateCell<JSByteArray>(*exec->heap())) JSByteArray(exec, structure, storage);
+            array->finishCreation(exec);
+            return array;
+        }
+
+        static Structure* createStructure(JSGlobalData&, JSGlobalObject*, JSValue prototype, const JSC::ClassInfo* = &s_info);
+
+        static bool getOwnPropertySlot(JSC::JSCell*, JSC::ExecState*, const JSC::Identifier& propertyName, JSC::PropertySlot&);
+        static bool getOwnPropertySlotByIndex(JSC::JSCell*, JSC::ExecState*, unsigned propertyName, JSC::PropertySlot&);
+        static bool getOwnPropertyDescriptor(JSObject*, ExecState*, const Identifier&, PropertyDescriptor&);
+        static void put(JSC::JSCell*, JSC::ExecState*, const JSC::Identifier& propertyName, JSC::JSValue, JSC::PutPropertySlot&);
+        static void putByIndex(JSC::JSCell*, JSC::ExecState*, unsigned propertyName, JSC::JSValue);
+
+        static void getOwnPropertyNames(JSC::JSObject*, JSC::ExecState*, JSC::PropertyNameArray&, EnumerationMode);
+
+        static JS_EXPORTDATA const ClassInfo s_info;
+        
+        size_t length() const { return m_storage->length(); }
+
+        WTF::ByteArray* storage() const { return m_storage.get(); }
+
+        ~JSByteArray();
+        static void destroy(JSCell*);
+
+        static size_t offsetOfStorage() { return OBJECT_OFFSETOF(JSByteArray, m_storage); }
+
+    protected:
+        static const unsigned StructureFlags = OverridesGetOwnPropertySlot | OverridesGetPropertyNames | JSObject::StructureFlags;
+
+        void finishCreation(ExecState* exec)
+        {
+            Base::finishCreation(exec->globalData());
+            putDirect(exec->globalData(), exec->globalData().propertyNames->length, jsNumber(m_storage->length()), ReadOnly | DontDelete);
+        }
+
+    private:
+        RefPtr<WTF::ByteArray> m_storage;
+    };
+    
+    JSByteArray* asByteArray(JSValue value);
+    inline JSByteArray* asByteArray(JSValue value)
+    {
+        return static_cast<JSByteArray*>(value.asCell());
+    }
+
+    inline bool isJSByteArray(JSValue v) { return v.isCell() && v.asCell()->classInfo() == &JSByteArray::s_info; }
+
+} // namespace JSC
+
+#endif // JSByteArray_h