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package libfastimport
import (
"fmt"
"strconv"
"strings"
"git.lukeshu.com/go/libfastimport/textproto"
)
func cbpGetMark(line string) (string, error) {
if len(line) != 41 {
return "", fmt.Errorf("get-mark: short <sha1>\\n: %q", line)
}
if line[40] != '\n' {
return "", fmt.Errorf("get-mark: malformed <sha1>\\n: %q", line)
}
for _, b := range line[:40] {
if !(('0' <= b && b <= '9') || ('a' <= b && b <= 'f')) {
return "", fmt.Errorf("get-mark: malformed <sha1>: %q", line[:40])
}
}
return line[:40], nil
}
func cbpCatBlob(full string) (sha1 string, data string, err error) {
// The format is:
//
// <sha1> SP 'blob' SP <size> LF
// <data> LF
if full[len(full)-1] != '\n' {
return "", "", fmt.Errorf("cat-blob: missing trailing newline")
}
lf := strings.IndexByte(full, '\n')
if lf < 0 || lf == len(full)-1 {
return "", "", fmt.Errorf("cat-blob: malformed header: %q", full)
}
head := full[:lf]
data = full[lf+1 : len(full)-1]
if len(head) < 40+6+1 {
return "", "", fmt.Errorf("cat-blob: malformed header: %q", head)
}
sha1 = head[:40]
for _, b := range sha1 {
if !(('0' <= b && b <= '9') || ('a' <= b && b <= 'f')) {
return "", "", fmt.Errorf("cat-blob: malformed <sha1>: %q", sha1)
}
}
if string(head[40:46]) != " blob " {
return "", "", fmt.Errorf("cat-blob: malformed header: %q", head)
}
size, err := strconv.Atoi(head[46:])
if err != nil {
return "", "", fmt.Errorf("cat-blob: malformed blob size: %v", err)
}
if size != len(data) {
return "", "", fmt.Errorf("cat-blob: size header (%d) didn't match delivered size (%d)", size, len(data))
}
return sha1, data, err
}
func cbpLs(line string) (mode textproto.Mode, dataref string, path textproto.Path, err error) {
// <mode> SP ('blob' | 'tree' | 'commit') SP <dataref> HT <path> LF
// or
// 'missing' SP <path> LF
if line[len(line)-1] != '\n' {
return 0, "", "", fmt.Errorf("ls: missing trailing newline")
}
if strings.HasPrefix(line, "missing ") {
strPath := line[8 : len(line)-1]
return 0, "", textproto.PathUnescape(strPath), nil
} else {
sp1 := strings.IndexByte(line, ' ')
sp2 := strings.IndexByte(line[sp1+1:], ' ')
ht := strings.IndexByte(line[sp2+1:], '\t')
if sp1 < 0 || sp2 < 0 || ht < 0 {
return 0, "", "", fmt.Errorf("ls: malformed line: %q", line)
}
strMode := line[:sp1]
strRef := line[sp2+1 : ht]
strPath := line[ht+1 : len(line)-1]
nMode, err := strconv.ParseUint(strMode, 8, 18)
if err != nil {
return 0, "", "", err
}
return textproto.Mode(nMode), strRef, textproto.PathUnescape(strPath), nil
}
}
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