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UUID.h
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1 /*
2 * Copyright (c) 2016-2017, NVIDIA CORPORATION. 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 * * Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * * 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 * * Neither the name of NVIDIA CORPORATION nor the names of its
13 * contributors may be used to endorse or promote products derived
14 * from this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY
17 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
19 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
20 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
21 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
22 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
23 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
24 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
29 /**
30 * @file
31 * <b>Libargus API: UUID API</b>
32 *
33 * @b Description: Defines the UUID types used by libargus.
34 */
35
36 #ifndef _ARGUS_UUID_H
37 #define _ARGUS_UUID_H
38
39 #include <stdint.h>
40 #include <cstring>
41
42 namespace Argus
43 {
44
45 const uint32_t MAX_UUID_NAME_SIZE = 32;
46
47 /**
48 * A universally unique identifier.
49 */
50 struct UUID
51 {
52 uint32_t time_low;
53 uint16_t time_mid;
54 uint16_t time_hi_and_version;
55 uint16_t clock_seq;
56 uint8_t node[6];
57
58 bool operator==(const UUID &r) const
59 {
60 return memcmp(this, &r, sizeof(UUID)) == 0;
61 }
62
63 bool operator<(const UUID &r) const
64 {
65 return memcmp(this, &r, sizeof(UUID)) < 0;
66 }
67 };
68
69 /**
70 * A universally unique identifier with a name (used for debugging purposes).
71 */
72 class NamedUUID : public UUID
73 {
74 public:
75 NamedUUID(uint32_t time_low_
76 , uint16_t time_mid_
77 , uint16_t time_hi_and_version_
78 , uint16_t clock_seq_
79 , uint8_t c0, uint8_t c1, uint8_t c2, uint8_t c3, uint8_t c4, uint8_t c5
80 , const char* name)
81 {
82 time_low = time_low_;
83 time_mid = time_mid_;
84 time_hi_and_version = time_hi_and_version_;
85 clock_seq = clock_seq_;
86 node[0] = c0; node[1] = c1; node[2] = c2; node[3] = c3; node[4] = c4; node[5] = c5;
87 strncpy(m_name, name, sizeof(m_name)-1);
88 m_name[sizeof(m_name)-1] = '\0';
89 }
90
91 NamedUUID(const NamedUUID& copied)
92 : UUID(copied)
93 {
94 strncpy(m_name, copied.m_name, sizeof(m_name)-1);
95 m_name[sizeof(m_name)-1] = '\0';
96 }
97
98 NamedUUID& operator=(const NamedUUID& copied)
99 {
100 static_cast< UUID&>(*this) = copied;
101
102 return *this;
103 }
104
105 bool operator==(const NamedUUID& compared) const
106 {
107 return static_cast<const UUID&>(*this) == compared;
108 }
109
110 bool operator!=(const NamedUUID& compared) const
111 {
112 return !(static_cast<const UUID&>(*this) == compared);
113 }
114
115 const char* getName() const { return m_name; }
116
117 private:
118 char m_name[MAX_UUID_NAME_SIZE];
119
120 NamedUUID();
121 };
122
123 /// Helper macro used to define NamedUUID-derived values.
124 #define DEFINE_UUID(TYPE, NAME, l, s0, s1, s2, c0,c1,c2,c3,c4,c5) \
125 static const TYPE NAME(0x##l, 0x##s0, 0x##s1, 0x##s2, \
126 0x##c0, 0x##c1, 0x##c2, 0x##c3, 0x##c4, 0x##c0, #NAME);
127
128 #define DEFINE_NAMED_UUID_CLASS(NAME) \
129 class NAME : public NamedUUID \
130 { \
131 public: \
132 NAME(uint32_t time_low_ \
133 , uint16_t time_mid_ \
134 , uint16_t time_hi_and_version_ \
135 , uint16_t clock_seq_ \
136 , uint8_t c0, uint8_t c1, uint8_t c2, uint8_t c3, uint8_t c4, uint8_t c5 \
137 , const char* name) \
138 : NamedUUID(time_low_, time_mid_, time_hi_and_version_, clock_seq_, \
139 c0, c1, c2, c3, c4, c5, name) \
140 {} \
141 private: \
142 NAME();\
143 };
144
145 } // namespace Argus
146
147 #endif // _ARGUS_UUID_H