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 ArgumentEncoder_h
27#define ArgumentEncoder_h
28
29#include "ArgumentCoder.h"
30#include "Attachment.h"
31#include <wtf/Vector.h>
32
33namespace IPC {
34
35class ArgumentEncoder;
36class DataReference;
37
38class ArgumentEncoder {
39    WTF_MAKE_FAST_ALLOCATED;
40public:
41    ArgumentEncoder();
42    virtual ~ArgumentEncoder();
43
44    void encodeFixedLengthData(const uint8_t*, size_t, unsigned alignment);
45    void encodeVariableLengthByteArray(const DataReference&);
46
47    template<typename T> void encodeEnum(T t)
48    {
49        COMPILE_ASSERT(sizeof(T) <= sizeof(uint64_t), enum_type_must_not_be_larger_than_64_bits);
50
51        encode(static_cast<uint64_t>(t));
52    }
53
54    template<typename T> void encode(const T& t)
55    {
56        ArgumentCoder<T>::encode(*this, t);
57    }
58
59    template<typename T> ArgumentEncoder& operator<<(const T& t)
60    {
61        encode(t);
62        return *this;
63    }
64
65    uint8_t* buffer() const { return m_buffer; }
66    size_t bufferSize() const { return m_bufferSize; }
67
68    void addAttachment(const Attachment&);
69    Vector<Attachment> releaseAttachments();
70    void reserve(size_t);
71
72private:
73    void encode(bool);
74    void encode(uint8_t);
75    void encode(uint16_t);
76    void encode(uint32_t);
77    void encode(uint64_t);
78    void encode(int32_t);
79    void encode(int64_t);
80    void encode(float);
81    void encode(double);
82
83    uint8_t* grow(unsigned alignment, size_t size);
84
85    uint8_t m_inlineBuffer[512];
86
87    uint8_t* m_buffer;
88    uint8_t* m_bufferPointer;
89
90    size_t m_bufferSize;
91    size_t m_bufferCapacity;
92
93    Vector<Attachment> m_attachments;
94};
95
96} // namespace IPC
97
98#endif // ArgumentEncoder_h
99