diff options
| author | 2026-03-26 09:17:14 +0000 | |
|---|---|---|
| committer | 2026-03-26 09:18:30 +0000 | |
| commit | 3e884f5f3d42cbc4874a04da31dde10314b0cfad (patch) | |
| tree | f5e1e325fd1a2a0801791c054010213214475d80 /packfile/entry.go | |
| parent | network/receivepack: Rename from receivepack (diff) | |
| signature | No signature | |
format: Move commitgraph and packfile here
Diffstat (limited to 'packfile/entry.go')
| -rw-r--r-- | packfile/entry.go | 76 |
1 files changed, 0 insertions, 76 deletions
diff --git a/packfile/entry.go b/packfile/entry.go deleted file mode 100644 index 0f9c7c8d..00000000 --- a/packfile/entry.go +++ /dev/null @@ -1,76 +0,0 @@ -package packfile - -import ( - "fmt" - - objecttype "codeberg.org/lindenii/furgit/object/type" -) - -// Entry is one parsed pack entry prefix, including any delta base reference -// data that appears before the compressed payload. -type Entry struct { - // Type is the pack entry type. - Type objecttype.Type - // Size is the declared resulting object size. - Size int64 - // DataOffset is the byte offset from the start of the entry to the zlib - // payload bytes. - DataOffset int - // RefBaseID is the referenced base object ID bytes for ref-delta entries. - RefBaseID []byte - // OfsBaseDistance is the backward distance for ofs-delta entries. - OfsBaseDistance uint64 -} - -// ParseEntry parses one full pack entry prefix from data. -// -// hashSize must match the hash algorithm size used by the pack/index. -func ParseEntry(data []byte, hashSize int) (Entry, error) { - var zero Entry - - header, err := ParseEntryHeader(data) - if err != nil { - return zero, err - } - - entry := Entry{ - Type: header.Type, - Size: header.Size, - DataOffset: header.HeaderSize, - } - - switch entry.Type { - case objecttype.TypeCommit, objecttype.TypeTree, objecttype.TypeBlob, objecttype.TypeTag: - // Base object entries have no extra prefix fields. - case objecttype.TypeRefDelta: - if hashSize <= 0 { - return zero, fmt.Errorf("packfile: invalid hash size %d", hashSize) - } - - end := entry.DataOffset + hashSize - if end > len(data) { - return zero, fmt.Errorf("packfile: truncated ref-delta base id") - } - - entry.RefBaseID = data[entry.DataOffset:end] - entry.DataOffset = end - case objecttype.TypeOfsDelta: - dist, consumed, err := ParseOfsDeltaDistance(data[entry.DataOffset:]) - if err != nil { - return zero, err - } - - entry.OfsBaseDistance = dist - entry.DataOffset += consumed - case objecttype.TypeInvalid, objecttype.TypeFuture: - return zero, fmt.Errorf("packfile: unsupported object type %d", entry.Type) - default: - return zero, fmt.Errorf("packfile: unsupported object type %d", entry.Type) - } - - if entry.DataOffset > len(data) { - return zero, fmt.Errorf("packfile: entry data offset out of bounds") - } - - return entry, nil -} |
