diff options
Diffstat (limited to 'plumbing/format/packfile/encoder.go')
| -rw-r--r-- | plumbing/format/packfile/encoder.go | 23 |
1 files changed, 14 insertions, 9 deletions
diff --git a/plumbing/format/packfile/encoder.go b/plumbing/format/packfile/encoder.go index 1426559..7ee6546 100644 --- a/plumbing/format/packfile/encoder.go +++ b/plumbing/format/packfile/encoder.go @@ -14,10 +14,10 @@ import ( // Encoder gets the data from the storage and write it into the writer in PACK // format type Encoder struct { - selector *deltaSelector - w *offsetWriter - zw *zlib.Writer - hasher plumbing.Hasher + selector *deltaSelector + w *offsetWriter + zw *zlib.Writer + hasher plumbing.Hasher // offsets is a map of object hashes to corresponding offsets in the packfile. // It is used to determine offset of the base of a delta when a OFS_DELTA is // used. @@ -45,10 +45,15 @@ func NewEncoder(w io.Writer, s storer.EncodedObjectStorer, useRefDeltas bool) *E } } -// Encode creates a packfile containing all the objects referenced in hashes -// and writes it to the writer in the Encoder. -func (e *Encoder) Encode(hashes []plumbing.Hash) (plumbing.Hash, error) { - objects, err := e.selector.ObjectsToPack(hashes) +// Encode creates a packfile containing all the objects referenced in +// hashes and writes it to the writer in the Encoder. `packWindow` +// specifies the size of the sliding window used to compare objects +// for delta compression; 0 turns off delta compression entirely. +func (e *Encoder) Encode( + hashes []plumbing.Hash, + packWindow uint, +) (plumbing.Hash, error) { + objects, err := e.selector.ObjectsToPack(hashes, packWindow) if err != nil { return plumbing.ZeroHash, err } @@ -137,7 +142,7 @@ func (e *Encoder) writeOfsDeltaHeader(deltaOffset int64, base plumbing.Hash) err // for OFS_DELTA, offset of the base is interpreted as negative offset // relative to the type-byte of the header of the ofs-delta entry. - relativeOffset := deltaOffset-baseOffset + relativeOffset := deltaOffset - baseOffset if relativeOffset <= 0 { return fmt.Errorf("bad offset for OFS_DELTA entry: %d", relativeOffset) } |