-
Notifications
You must be signed in to change notification settings - Fork 0
/
uint256.go
88 lines (69 loc) · 1.52 KB
/
uint256.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
package common
import (
"bytes"
"encoding/binary"
"errors"
"io"
. "github.com/icloudland/starchain/errors"
)
const UINT256SIZE int = 32
type Uint256 [UINT256SIZE]uint8
func (u *Uint256) CompareTo(o Uint256) int {
x := u.ToArray()
y := o.ToArray()
for i := len(x) - 1; i >= 0; i-- {
if x[i] > y[i] {
return 1
}
if x[i] < y[i] {
return -1
}
}
return 0
}
func (u *Uint256) ToArray() []byte {
var x []byte = make([]byte, UINT256SIZE)
for i := 0; i < 32; i++ {
x[i] = byte(u[i])
}
return x
}
func (u *Uint256) ToArrayReverse() []byte {
var x []byte = make([]byte, UINT256SIZE)
for i, j := 0, UINT256SIZE-1; i < j; i, j = i+1, j-1 {
x[i], x[j] = byte(u[j]), byte(u[i])
}
return x
}
func (u *Uint256) Serialize(w io.Writer) (int, error) {
b_buf := bytes.NewBuffer([]byte{})
binary.Write(b_buf, binary.LittleEndian, u)
len, err := w.Write(b_buf.Bytes())
if err != nil {
return 0, err
}
return len, nil
}
func (u *Uint256) Deserialize(r io.Reader) error {
p := make([]byte, UINT256SIZE)
n, err := r.Read(p)
if n <= 0 || err != nil {
return err
}
b_buf := bytes.NewBuffer(p)
binary.Read(b_buf, binary.LittleEndian, u)
return nil
}
func (u *Uint256) ToString() string {
return string(u.ToArray())
}
func Uint256ParseFromBytes(f []byte) (Uint256, error) {
if len(f) != UINT256SIZE {
return Uint256{}, NewDetailErr(errors.New("[Common]: Uint256ParseFromBytes err, len != 32"), ErrNoCode, "")
}
var hash [32]uint8
for i := 0; i < 32; i++ {
hash[i] = f[i]
}
return Uint256(hash), nil
}