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
|
package code
import (
"bytes"
"encoding/binary"
"math"
"strings"
)
type Code struct {
code []byte
}
func New(code []byte) Code {
return Code{
code: code,
}
}
func (c *Code) Len() int {
return len(c.code)
}
func (c *Code) Code() []byte {
return c.code
}
func (c *Code) GetOp(at int) (Op, int) {
return Op(c.code[at]), 1
}
func (c *Code) GetUint(at int) (uint64, int) {
advance := 8
x := binary.LittleEndian.Uint64(c.code[at : at+advance])
return x, advance
}
func (c *Code) GetInt(at int) (int64, int) {
x, advance := c.GetUint(at)
return int64(x), advance
}
func (c *Code) GetFloat(at int) (float64, int) {
x, advance := c.GetUint(at)
return math.Float64frombits(x), advance
}
func (c *Code) GetString(at int) (string, int) {
advance := 0
reader := bytes.NewReader(c.code[at:])
builder := strings.Builder{}
for {
r, size, err := reader.ReadRune()
advance += size
if err != nil {
break
}
if r == 0 {
break
}
builder.WriteRune(r)
}
return builder.String(), advance
}
|
