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/PassOwnPtr.h>
32#include <wtf/TypeTraits.h>
33#include <wtf/Vector.h>
34
35namespace CoreIPC {
36
37class ArgumentEncoder;
38
39class ArgumentEncoder {
40public:
41    static PassOwnPtr<ArgumentEncoder> create(uint64_t destinationID);
42    ~ArgumentEncoder();
43
44    void encodeBytes(const uint8_t*, size_t);
45
46    void encodeBool(bool);
47    void encodeUInt32(uint32_t);
48    void encodeUInt64(uint64_t);
49    void encodeInt32(int32_t);
50    void encodeInt64(int64_t);
51    void encodeFloat(float);
52    void encodeDouble(double);
53
54    template<typename T> void encodeEnum(T t)
55    {
56        COMPILE_ASSERT(sizeof(T) <= sizeof(uint64_t), enum_type_must_not_be_larger_than_64_bits);
57
58        encodeUInt64(static_cast<uint64_t>(t));
59    }
60
61    // Generic type encode function.
62    template<typename T> void encode(const T& t)
63    {
64        ArgumentCoder<T>::encode(this, t);
65    }
66
67    uint8_t* buffer() const { return m_buffer; }
68    size_t bufferSize() const { return m_bufferSize; }
69
70    void addAttachment(const Attachment&);
71    Vector<Attachment> releaseAttachments();
72
73#ifndef NDEBUG
74    void debug();
75#endif
76
77private:
78    explicit ArgumentEncoder(uint64_t destinationID);
79    uint8_t* grow(unsigned alignment, size_t size);
80
81    uint8_t* m_buffer;
82    uint8_t* m_bufferPointer;
83
84    size_t m_bufferSize;
85    size_t m_bufferCapacity;
86
87    Vector<Attachment> m_attachments;
88};
89
90template<> inline void ArgumentEncoder::encode(const bool& n)
91{
92    encodeBool(n);
93}
94
95template<> inline void ArgumentEncoder::encode(const uint32_t& n)
96{
97    encodeUInt32(n);
98}
99
100template<> inline void ArgumentEncoder::encode(const uint64_t& n)
101{
102    encodeUInt64(n);
103}
104
105template<> inline void ArgumentEncoder::encode(const int32_t& n)
106{
107    encodeInt32(n);
108}
109
110template<> inline void ArgumentEncoder::encode(const int64_t& n)
111{
112    encodeInt64(n);
113}
114
115template<> inline void ArgumentEncoder::encode(const float& n)
116{
117    encodeFloat(n);
118}
119
120template<> inline void ArgumentEncoder::encode(const double& n)
121{
122    encodeDouble(n);
123}
124
125} // namespace CoreIPC
126
127#endif // ArgumentEncoder_h
128