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
35 namespace CoreIPC {
36
37 class ArgumentEncoder;
38
39 class ArgumentEncoder {
40 public:
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
encodeEnum(T t)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.
encode(const T & t)62 template<typename T> void encode(const T& t)
63 {
64 ArgumentCoder<T>::encode(this, t);
65 }
66
buffer()67 uint8_t* buffer() const { return m_buffer; }
bufferSize()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
77 private:
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
encode(const bool & n)90 template<> inline void ArgumentEncoder::encode(const bool& n)
91 {
92 encodeBool(n);
93 }
94
encode(const uint32_t & n)95 template<> inline void ArgumentEncoder::encode(const uint32_t& n)
96 {
97 encodeUInt32(n);
98 }
99
encode(const uint64_t & n)100 template<> inline void ArgumentEncoder::encode(const uint64_t& n)
101 {
102 encodeUInt64(n);
103 }
104
encode(const int32_t & n)105 template<> inline void ArgumentEncoder::encode(const int32_t& n)
106 {
107 encodeInt32(n);
108 }
109
encode(const int64_t & n)110 template<> inline void ArgumentEncoder::encode(const int64_t& n)
111 {
112 encodeInt64(n);
113 }
114
encode(const float & n)115 template<> inline void ArgumentEncoder::encode(const float& n)
116 {
117 encodeFloat(n);
118 }
119
encode(const double & n)120 template<> inline void ArgumentEncoder::encode(const double& n)
121 {
122 encodeDouble(n);
123 }
124
125 } // namespace CoreIPC
126
127 #endif // ArgumentEncoder_h
128