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 libfastimport
import (
"fmt"
"bytes"
"strconv"
)
func CatBlobParseGetMark(dat []byte) (string, error) {
if len(dat) != 41 {
return "", fmt.Errorf("get-mark: short <sha1>\\n: %q", string(dat))
}
if dat[40] != '\n' {
return "", fmt.Errorf("get-mark: malformed <sha1>\\n: %q", string(dat))
}
for _, b := range dat[:40] {
if !(('0' <= b && b <= '9') || ('a' <= b && b <= 'f')) {
return "", fmt.Errorf("get-mark: malformed <sha1>: %q", string(dat[:40]))
}
}
return string(dat[:40]), nil
}
func CatBlobParseCatBlob(full []byte) (sha1 string, data []byte, err error) {
// The format is:
//
// <sha1> SP 'blob' SP <size> LF
// <data> LF
lf := bytes.IndexByte(full, '\n')
if lf < 0 || lf == len(full)-1 {
return "", nil, fmt.Errorf("cat-blob: malformed header: %q", string(full))
}
head := full[:lf]
data = full[lf+1:len(full)-1]
if len(head) < 40+6+1 {
return "", nil, fmt.Errorf("cat-blob: malformed header: %q", string(head))
}
sha1 = string(head[:40])
for _, b := range sha1 {
if !(('0' <= b && b <= '9') || ('a' <= b && b <= 'f')) {
return "", nil, fmt.Errorf("cat-blob: malformed <sha1>: %q", sha1)
}
}
if string(head[40:46]) != " blob " {
return "", nil, fmt.Errorf("cat-blob: malformed header: %q", head)
}
size, err := strconv.Atoi(string(head[46:]))
if err != nil {
return "", nil, fmt.Errorf("cat-blob: malformed blob size: %v", err)
}
if size != len(data) {
return "", nil, fmt.Errorf("cat-blob: size header (%d) didn't match delivered size (%d)", size, len(data))
}
return sha1, data, err
}
func CatBlobParseLs(dataref string, path string) error {
// <mode> SP ('blob' | 'tree' | 'commit') SP <dataref> HT <path> LF
// or
// 'missing' SP <path> LF
return nil // TODO
}
|
