runxiyu.tngl.sh
Fast implementation of Git in pure Go
1package object
2
3import (
4 "fmt"
5
6 "codeberg.org/lindenii/furgit/objectheader"
7 "codeberg.org/lindenii/furgit/objectid"
8 "codeberg.org/lindenii/furgit/objecttype"
9)
10
11// ParseObjectWithHeader parses a loose object in "type size\x00body" format.
12//
13//nolint:ireturn
14func ParseObjectWithHeader(raw []byte, algo objectid.Algorithm) (Object, error) {
15 ty, size, headerLen, ok := objectheader.Parse(raw)
16 if !ok {
17 return nil, fmt.Errorf("object: malformed object header")
18 }
19
20 body := raw[headerLen:]
21 if int64(len(body)) != size {
22 return nil, fmt.Errorf("object: size mismatch: header says %d bytes, body has %d", size, len(body))
23 }
24
25 return ParseObjectWithoutHeader(ty, body, algo)
26}
27
28// ParseObjectWithoutHeader parses a typed object body.
29//
30//nolint:ireturn
31func ParseObjectWithoutHeader(ty objecttype.Type, body []byte, algo objectid.Algorithm) (Object, error) {
32 switch ty {
33 case objecttype.TypeBlob:
34 return ParseBlob(body)
35 case objecttype.TypeTree:
36 return ParseTree(body, algo)
37 case objecttype.TypeCommit:
38 return ParseCommit(body, algo)
39 case objecttype.TypeTag:
40 return ParseTag(body, algo)
41 case objecttype.TypeInvalid, objecttype.TypeFuture, objecttype.TypeOfsDelta, objecttype.TypeRefDelta:
42 return nil, fmt.Errorf("object: unsupported object type %d", ty)
43 default:
44 return nil, fmt.Errorf("object: unsupported object type %d", ty)
45 }
46}