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juce_Uuid.cpp
1/*
2 ==============================================================================
3
4 This file is part of the JUCE library.
5 Copyright (c) 2022 - Raw Material Software Limited
6
7 JUCE is an open source library subject to commercial or open-source
8 licensing.
9
10 The code included in this file is provided under the terms of the ISC license
11 http://www.isc.org/downloads/software-support-policy/isc-license. Permission
12 To use, copy, modify, and/or distribute this software for any purpose with or
13 without fee is hereby granted provided that the above copyright notice and
14 this permission notice appear in all copies.
15
16 JUCE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL WARRANTIES, WHETHER
17 EXPRESSED OR IMPLIED, INCLUDING MERCHANTABILITY AND FITNESS FOR PURPOSE, ARE
18 DISCLAIMED.
19
20 ==============================================================================
21*/
22
23 namespace juce
24{
25
26 Uuid::Uuid()
27{
28 Random r;
29
30 for (size_t i = 0; i < sizeof (uuid); ++i)
31 uuid[i] = (uint8) (r.nextInt (256));
32
33 // To make it RFC 4122 compliant, need to force a few bits...
34 uuid[6] = (uuid[6] & 0x0f) | 0x40;
35 uuid[8] = (uuid[8] & 0x3f) | 0x80;
36}
37
38 Uuid::~Uuid() noexcept {}
39
40 Uuid::Uuid (const Uuid& other) noexcept
41{
42 memcpy (uuid, other.uuid, sizeof (uuid));
43}
44
45 Uuid& Uuid::operator= (const Uuid& other) noexcept
46{
47 memcpy (uuid, other.uuid, sizeof (uuid));
48 return *this;
49}
50
51 bool Uuid::operator== (const Uuid& other) const noexcept { return memcmp (uuid, other.uuid, sizeof (uuid)) == 0; }
52 bool Uuid::operator!= (const Uuid& other) const noexcept { return ! operator== (other); }
53
54 bool Uuid::operator< (const Uuid& other) const noexcept { return compare (other) < 0; }
55 bool Uuid::operator> (const Uuid& other) const noexcept { return compare (other) > 0; }
56 bool Uuid::operator<= (const Uuid& other) const noexcept { return compare (other) <= 0; }
57 bool Uuid::operator>= (const Uuid& other) const noexcept { return compare (other) >= 0; }
58
59 int Uuid::compare (Uuid other) const noexcept
60{
61 for (size_t i = 0; i < sizeof (uuid); ++i)
62 if (int diff = uuid[i] - (int) other.uuid[i])
63 return diff > 0 ? 1 : -1;
64
65 return 0;
66}
67
68 Uuid Uuid::null() noexcept
69{
70 return Uuid ((const uint8*) nullptr);
71}
72
73 bool Uuid::isNull() const noexcept
74{
75 for (auto i : uuid)
76 if (i != 0)
77 return false;
78
79 return true;
80}
81
82 String Uuid::getHexRegion (int start, int length) const
83{
84 return String::toHexString (uuid + start, length, 0);
85}
86
87 String Uuid::toString() const
88{
89 return getHexRegion (0, 16);
90}
91
92 String Uuid::toDashedString() const
93{
94 return getHexRegion (0, 4)
95 + "-" + getHexRegion (4, 2)
96 + "-" + getHexRegion (6, 2)
97 + "-" + getHexRegion (8, 2)
98 + "-" + getHexRegion (10, 6);
99}
100
101 Uuid::Uuid (const String& uuidString)
102{
103 operator= (uuidString);
104}
105
106 Uuid& Uuid::operator= (const String& uuidString)
107{
108 MemoryBlock mb;
109 mb.loadFromHexString (uuidString);
110 mb.ensureSize (sizeof (uuid), true);
111 mb.copyTo (uuid, 0, sizeof (uuid));
112 return *this;
113}
114
115 Uuid::Uuid (const uint8* const rawData) noexcept
116{
117 operator= (rawData);
118}
119
120 Uuid& Uuid::operator= (const uint8* const rawData) noexcept
121{
122 if (rawData != nullptr)
123 memcpy (uuid, rawData, sizeof (uuid));
124 else
125 zeromem (uuid, sizeof (uuid));
126
127 return *this;
128}
129
130uint32 Uuid::getTimeLow() const noexcept { return ByteOrder::bigEndianInt (uuid); }
131uint16 Uuid::getTimeMid() const noexcept { return ByteOrder::bigEndianShort (uuid + 4); }
132uint16 Uuid::getTimeHighAndVersion() const noexcept { return ByteOrder::bigEndianShort (uuid + 6); }
133uint8 Uuid::getClockSeqAndReserved() const noexcept { return uuid[8]; }
134uint8 Uuid::getClockSeqLow() const noexcept { return uuid[9]; }
135uint64 Uuid::getNode() const noexcept { return (((uint64) ByteOrder::bigEndianShort (uuid + 10)) << 32) + ByteOrder::bigEndianInt (uuid + 12); }
136
137uint64 Uuid::hash() const noexcept
138{
139 uint64 result = 0;
140
141 for (auto n : uuid)
142 result = ((uint64) 101) * result + n;
143
144 return result;
145}
146
147} // namespace juce
juce::ByteOrder::bigEndianInt
static constexpr uint32 bigEndianInt(const void *bytes) noexcept
Definition juce_ByteOrder.h:207
juce::ByteOrder::bigEndianShort
static constexpr uint16 bigEndianShort(const void *bytes) noexcept
Definition juce_ByteOrder.h:206
juce::MemoryBlock
Definition juce_MemoryBlock.h:33
juce::MemoryBlock::copyTo
void copyTo(void *destData, int sourceOffset, size_t numBytes) const noexcept
Definition juce_MemoryBlock.cpp:242
juce::MemoryBlock::loadFromHexString
void loadFromHexString(StringRef sourceHexString)
Definition juce_MemoryBlock.cpp:319
juce::MemoryBlock::ensureSize
void ensureSize(size_t minimumSize, bool initialiseNewSpaceToZero=false)
Definition juce_MemoryBlock.cpp:148
juce::Random
Definition juce_Random.h:35
juce::Random::nextInt
int nextInt() noexcept
Definition juce_Random.cpp:74
juce::String
Definition juce_String.h:53
juce::String::toHexString
static String toHexString(IntegerType number)
Definition juce_String.h:1097
juce::Uuid
Definition juce_Uuid.h:39
juce::Uuid::hash
uint64 hash() const noexcept
Definition juce_Uuid.cpp:137
juce::Uuid::Uuid
Uuid()
Definition juce_Uuid.cpp:26
juce::Uuid::toString
String toString() const
Definition juce_Uuid.cpp:87
juce::Uuid::operator=
Uuid & operator=(const Uuid &) noexcept
Definition juce_Uuid.cpp:45
juce::Uuid::~Uuid
~Uuid() noexcept
Definition juce_Uuid.cpp:38
juce::Uuid::getClockSeqAndReserved
uint8 getClockSeqAndReserved() const noexcept
Definition juce_Uuid.cpp:133
juce::Uuid::getTimeMid
uint16 getTimeMid() const noexcept
Definition juce_Uuid.cpp:131
juce::Uuid::getTimeLow
uint32 getTimeLow() const noexcept
Definition juce_Uuid.cpp:130
juce::Uuid::getClockSeqLow
uint8 getClockSeqLow() const noexcept
Definition juce_Uuid.cpp:134
juce::Uuid::getTimeHighAndVersion
uint16 getTimeHighAndVersion() const noexcept
Definition juce_Uuid.cpp:132
juce::Uuid::isNull
bool isNull() const noexcept
Definition juce_Uuid.cpp:73
juce::Uuid::toDashedString
String toDashedString() const
Definition juce_Uuid.cpp:92
juce::Uuid::getNode
uint64 getNode() const noexcept
Definition juce_Uuid.cpp:135
juce::Uuid::null
static Uuid null() noexcept
Definition juce_Uuid.cpp:68