-
Notifications
You must be signed in to change notification settings - Fork 0
/
utils.go
96 lines (77 loc) · 1.84 KB
/
utils.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
package blake512
import (
"math/bits"
"encoding/binary"
)
// Endianness option
const littleEndian bool = false
func getu32(ptr []byte) uint32 {
if littleEndian {
return binary.LittleEndian.Uint32(ptr)
} else {
return binary.BigEndian.Uint32(ptr)
}
}
func putu32(ptr []byte, a uint32) {
if littleEndian {
binary.LittleEndian.PutUint32(ptr, a)
} else {
binary.BigEndian.PutUint32(ptr, a)
}
}
func getu64(ptr []byte) uint64 {
if littleEndian {
return binary.LittleEndian.Uint64(ptr)
} else {
return binary.BigEndian.Uint64(ptr)
}
}
func putu64(ptr []byte, a uint64) {
if littleEndian {
binary.LittleEndian.PutUint64(ptr, a)
} else {
binary.BigEndian.PutUint64(ptr, a)
}
}
func bytesToUint32s(b []byte) []uint32 {
size := len(b) / 4
dst := make([]uint32, size)
for i := 0; i < size; i++ {
j := i * 4
if littleEndian {
dst[i] = binary.LittleEndian.Uint32(b[j:])
} else {
dst[i] = binary.BigEndian.Uint32(b[j:])
}
}
return dst
}
func uint32sToBytes(w []uint32) []byte {
size := len(w) * 4
dst := make([]byte, size)
for i := 0; i < len(w); i++ {
j := i * 4
if littleEndian {
binary.LittleEndian.PutUint32(dst[j:], w[i])
} else {
binary.BigEndian.PutUint32(dst[j:], w[i])
}
}
return dst
}
func bytesToUint64s(b []byte) []uint64 {
size := len(b) / 8
dst := make([]uint64, size)
for i := 0; i < size; i++ {
j := i * 8
if littleEndian {
dst[i] = binary.LittleEndian.Uint64(b[j:])
} else {
dst[i] = binary.BigEndian.Uint64(b[j:])
}
}
return dst
}
func circularRight(x uint64, n int) uint64 {
return bits.RotateLeft64(x, 64 - n)
}