1/*
2 * Copyright (C) 2013-2016 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#pragma once
27
28#include "DataView.h"
29#include "JSArrayBufferView.h"
30
31namespace JSC {
32
33class JSDataView final : public JSArrayBufferView {
34public:
35 typedef JSArrayBufferView Base;
36 static const unsigned elementSize = 1;
37
38protected:
39 JSDataView(VM&, ConstructionContext&, ArrayBuffer*);
40
41public:
42 JS_EXPORT_PRIVATE static JSDataView* create(
43 ExecState*, Structure*, RefPtr<ArrayBuffer>&&, unsigned byteOffset,
44 unsigned byteLength);
45
46 // Dummy methods, which don't actually work; these are just in place to
47 // placate some template specialization we do elsewhere.
48 static JSDataView* createUninitialized(ExecState*, Structure*, unsigned length);
49 static JSDataView* create(ExecState*, Structure*, unsigned length);
50 bool set(ExecState*, unsigned, JSObject*, unsigned, unsigned length);
51 bool setIndex(ExecState*, unsigned, JSValue);
52
53 ArrayBuffer* possiblySharedBuffer() const { return m_buffer; }
54 ArrayBuffer* unsharedBuffer() const
55 {
56 RELEASE_ASSERT(!m_buffer->isShared());
57 return m_buffer;
58 }
59
60 RefPtr<DataView> possiblySharedTypedImpl();
61 RefPtr<DataView> unsharedTypedImpl();
62
63 static const TypedArrayType TypedArrayStorageType = TypeDataView;
64
65protected:
66 static bool getOwnPropertySlot(JSObject*, ExecState*, PropertyName, PropertySlot&);
67 static bool put(JSCell*, ExecState*, PropertyName, JSValue, PutPropertySlot&);
68 static bool defineOwnProperty(JSObject*, ExecState*, PropertyName, const PropertyDescriptor&, bool shouldThrow);
69 static bool deleteProperty(JSCell*, ExecState*, PropertyName);
70
71 static void getOwnNonIndexPropertyNames(JSObject*, ExecState*, PropertyNameArray&, EnumerationMode);
72
73public:
74 static Structure* createStructure(VM&, JSGlobalObject*, JSValue prototype);
75
76 DECLARE_EXPORT_INFO;
77
78private:
79 ArrayBuffer* m_buffer;
80};
81
82} // namespace JSC
83