-
Notifications
You must be signed in to change notification settings - Fork 11
/
serialnumber.go
113 lines (93 loc) · 2.95 KB
/
serialnumber.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
// Copyright (C) 2019 Storj Labs, Inc.
// See LICENSE for copying information.
package storj
import (
"database/sql/driver"
"github.com/zeebo/errs"
)
// ErrSerialNumber is used when something goes wrong with a serial number.
var ErrSerialNumber = errs.Class("serial number")
// SerialNumber is the unique identifier for pieces.
type SerialNumber [16]byte
// SerialNumberFromString decodes an base32 encoded.
func SerialNumberFromString(s string) (SerialNumber, error) {
idBytes, err := base32Encoding.DecodeString(s)
if err != nil {
return SerialNumber{}, ErrSerialNumber.Wrap(err)
}
return SerialNumberFromBytes(idBytes)
}
// SerialNumberFromBytes converts a byte slice into a serial number.
func SerialNumberFromBytes(b []byte) (SerialNumber, error) {
if len(b) != len(SerialNumber{}) {
return SerialNumber{}, ErrSerialNumber.New("not enough bytes to make a serial number; have %d, need %d", len(b), len(NodeID{}))
}
var id SerialNumber
copy(id[:], b)
return id, nil
}
// IsZero returns whether serial number is unassigned.
func (id SerialNumber) IsZero() bool {
return id == SerialNumber{}
}
// Less returns whether id is smaller than other in lexicographic order.
func (id SerialNumber) Less(other SerialNumber) bool {
for k, v := range id {
if v < other[k] {
return true
} else if v > other[k] {
return false
}
}
return false
}
// String representation of the serial number.
func (id SerialNumber) String() string { return base32Encoding.EncodeToString(id.Bytes()) }
// Bytes returns bytes of the serial number.
func (id SerialNumber) Bytes() []byte { return id[:] }
// Marshal serializes a serial number.
func (id SerialNumber) Marshal() ([]byte, error) {
return id.Bytes(), nil
}
// MarshalTo serializes a serial number into the passed byte slice.
func (id *SerialNumber) MarshalTo(data []byte) (n int, err error) {
n = copy(data, id.Bytes())
return n, nil
}
// Unmarshal deserializes a serial number.
func (id *SerialNumber) Unmarshal(data []byte) error {
var err error
*id, err = SerialNumberFromBytes(data)
return err
}
// Size returns the length of a serial number (implements gogo's custom type interface).
func (id *SerialNumber) Size() int {
return len(id)
}
// MarshalText serializes a serial number to a base32 string.
func (id SerialNumber) MarshalText() ([]byte, error) {
return []byte(id.String()), nil
}
// UnmarshalText deserializes a base32 string to a serial number.
func (id *SerialNumber) UnmarshalText(data []byte) error {
var err error
*id, err = SerialNumberFromString(string(data))
if err != nil {
return err
}
return nil
}
// Value set a SerialNumber to a database field.
func (id SerialNumber) Value() (driver.Value, error) {
return id.Bytes(), nil
}
// Scan extracts a SerialNumber from a database field.
func (id *SerialNumber) Scan(src interface{}) (err error) {
b, ok := src.([]byte)
if !ok {
return ErrSerialNumber.New("SerialNumber Scan expects []byte")
}
n, err := SerialNumberFromBytes(b)
*id = n
return err
}