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