-
Notifications
You must be signed in to change notification settings - Fork 22
/
uuid.go
137 lines (120 loc) · 3.25 KB
/
uuid.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
// Protocol Buffers for Go with Gadgets
//
// Copyright (c) 2013, The GoGo Authors. All rights reserved.
// http://github.com/gogo/protobuf
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
package test
import (
"bytes"
"encoding/hex"
"encoding/json"
)
func PutLittleEndianUint64(b []byte, offset int, v uint64) {
b[offset] = byte(v)
b[offset+1] = byte(v >> 8)
b[offset+2] = byte(v >> 16)
b[offset+3] = byte(v >> 24)
b[offset+4] = byte(v >> 32)
b[offset+5] = byte(v >> 40)
b[offset+6] = byte(v >> 48)
b[offset+7] = byte(v >> 56)
}
type Uuid []byte
func (uuid Uuid) Bytes() []byte {
return uuid
}
func (uuid Uuid) Marshal() ([]byte, error) {
if len(uuid) == 0 {
return nil, nil
}
return []byte(uuid), nil
}
func (uuid Uuid) MarshalTo(data []byte) (n int, err error) {
if len(uuid) == 0 {
return 0, nil
}
copy(data, uuid)
return 16, nil
}
func (uuid *Uuid) Unmarshal(data []byte) error {
if len(data) == 0 {
uuid = nil
return nil
}
id := Uuid(make([]byte, 16))
copy(id, data)
*uuid = id
return nil
}
func (uuid *Uuid) Size() int {
if uuid == nil {
return 0
}
if len(*uuid) == 0 {
return 0
}
return 16
}
func (uuid Uuid) MarshalJSON() ([]byte, error) {
s := hex.EncodeToString([]byte(uuid))
return json.Marshal(s)
}
func (uuid *Uuid) UnmarshalJSON(data []byte) error {
var s string
err := json.Unmarshal(data, &s)
if err != nil {
return err
}
d, err := hex.DecodeString(s)
if err != nil {
return err
}
*uuid = Uuid(d)
return nil
}
func (uuid Uuid) Equal(other Uuid) bool {
return bytes.Equal(uuid[0:], other[0:])
}
func (uuid Uuid) Compare(other Uuid) int {
return bytes.Compare(uuid[0:], other[0:])
}
type int63 interface {
Int63() int64
}
func NewPopulatedUuid(r int63) *Uuid {
u := RandV4(r)
return &u
}
func RandV4(r int63) Uuid {
uuid := make(Uuid, 16)
uuid.RandV4(r)
return uuid
}
func (uuid Uuid) RandV4(r int63) {
PutLittleEndianUint64(uuid, 0, uint64(r.Int63()))
PutLittleEndianUint64(uuid, 8, uint64(r.Int63()))
uuid[6] = (uuid[6] & 0xf) | 0x40
uuid[8] = (uuid[8] & 0x3f) | 0x80
}