1/* 2 * Copyright (C) 2013 Apple Inc. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY 14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR 17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY 21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26#ifndef JSDataView_h 27#define JSDataView_h 28 29#include "DataView.h" 30#include "JSArrayBufferView.h" 31 32namespace JSC { 33 34class JSDataView : public JSArrayBufferView { 35public: 36 typedef JSArrayBufferView Base; 37 static const unsigned elementSize = 1; 38 39protected: 40 JSDataView(VM&, ConstructionContext&, ArrayBuffer*); 41 42public: 43 static JSDataView* create( 44 ExecState*, Structure*, PassRefPtr<ArrayBuffer>, unsigned byteOffset, 45 unsigned byteLength); 46 47 // Dummy methods, which don't actually work; these are just in place to 48 // placate some template specialization we do elsewhere. 49 static JSDataView* createUninitialized(ExecState*, Structure*, unsigned length); 50 static JSDataView* create(ExecState*, Structure*, unsigned length); 51 bool set(ExecState*, JSObject*, unsigned offset, unsigned length); 52 53 ArrayBuffer* buffer() const { return m_buffer; } 54 55 PassRefPtr<DataView> typedImpl(); 56 57 static const TypedArrayType TypedArrayStorageType = TypeDataView; 58 59protected: 60 static bool getOwnPropertySlot(JSObject*, ExecState*, PropertyName, PropertySlot&); 61 62 static ArrayBuffer* slowDownAndWasteMemory(JSArrayBufferView*); 63 static PassRefPtr<ArrayBufferView> getTypedArrayImpl(JSArrayBufferView*); 64 65public: 66 static Structure* createStructure(VM&, JSGlobalObject*, JSValue prototype); 67 68 DECLARE_EXPORT_INFO; 69 70private: 71 ArrayBuffer* m_buffer; 72}; 73 74} // namespace JSC 75 76#endif // JSDataView_h 77 78