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 <inttypes.h>
30 
31 namespace CoreIPC {
32 
33 class ArgumentDecoder;
34 class ArgumentEncoder;
35 
36 class DataReference {
37 public:
DataReference()38     DataReference()
39         : m_data(0)
40         , m_size(0)
41     {
42     }
43 
DataReference(const uint8_t * data,size_t size)44     DataReference(const uint8_t* data, size_t size)
45         : m_data(data)
46         , m_size(size)
47     {
48     }
49 
isEmpty()50     bool isEmpty() const { return size() == 0; }
51 
size()52     size_t size() const { return m_size; }
data()53     const uint8_t* data() const
54     {
55         if (isEmpty())
56             return 0;
57         return m_data;
58     }
59 
60     void encode(ArgumentEncoder* encoder) const;
61     static bool decode(ArgumentDecoder* decoder, DataReference& dataReference);
62 
63 private:
64     const uint8_t* m_data;
65     size_t m_size;
66 };
67 
68 } // namespace CoreIPC
69 
70 #endif // DataReference_h
71