1/*
2 * Copyright (C) 2010 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. AND ITS CONTRIBUTORS ``AS IS''
14 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
15 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
17 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
18 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
19 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
20 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
21 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
22 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
23 * THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#ifndef DataReference_h
27#define DataReference_h
28
29#include <wtf/Vector.h>
30
31namespace CoreIPC {
32
33class ArgumentDecoder;
34class ArgumentEncoder;
35
36class DataReference {
37public:
38    DataReference()
39        : m_data(0)
40        , m_size(0)
41    {
42    }
43
44    DataReference(const uint8_t* data, size_t size)
45        : m_data(data)
46        , m_size(size)
47    {
48    }
49
50    template<size_t inlineCapacity>
51    DataReference(const Vector<uint8_t, inlineCapacity>& vector)
52        : m_data(vector.data())
53        , m_size(vector.size())
54    {
55    }
56
57    bool isEmpty() const { return size() == 0; }
58
59    size_t size() const { return m_size; }
60    const uint8_t* data() const
61    {
62        if (isEmpty())
63            return 0;
64        return m_data;
65    }
66
67    Vector<uint8_t> vector() const
68    {
69        Vector<uint8_t> result;
70        result.append(m_data, m_size);
71
72        return result;
73    }
74
75    void encode(ArgumentEncoder&) const;
76    static bool decode(ArgumentDecoder&, DataReference&);
77
78private:
79    const uint8_t* m_data;
80    size_t m_size;
81};
82
83} // namespace CoreIPC
84
85#endif // DataReference_h
86