diff options
Diffstat (limited to 'vendor/github.com/klauspost/compress/zstd/framedec.go')
| -rw-r--r-- | vendor/github.com/klauspost/compress/zstd/framedec.go | 23 |
1 files changed, 11 insertions, 12 deletions
diff --git a/vendor/github.com/klauspost/compress/zstd/framedec.go b/vendor/github.com/klauspost/compress/zstd/framedec.go index 780880ebe..fc4a566d3 100644 --- a/vendor/github.com/klauspost/compress/zstd/framedec.go +++ b/vendor/github.com/klauspost/compress/zstd/framedec.go @@ -40,7 +40,7 @@ type frameDec struct { FrameContentSize uint64 frameDone sync.WaitGroup - DictionaryID uint32 + DictionaryID *uint32 HasCheckSum bool SingleSegment bool @@ -142,7 +142,7 @@ func (d *frameDec) reset(br byteBuffer) error { // Read Dictionary_ID // https://github.com/facebook/zstd/blob/dev/doc/zstd_compression_format.md#dictionary_id - d.DictionaryID = 0 + d.DictionaryID = nil if size := fhd & 3; size != 0 { if size == 3 { size = 4 @@ -154,19 +154,22 @@ func (d *frameDec) reset(br byteBuffer) error { } return io.ErrUnexpectedEOF } + var id uint32 switch size { case 1: - d.DictionaryID = uint32(b[0]) + id = uint32(b[0]) case 2: - d.DictionaryID = uint32(b[0]) | (uint32(b[1]) << 8) + id = uint32(b[0]) | (uint32(b[1]) << 8) case 4: - d.DictionaryID = uint32(b[0]) | (uint32(b[1]) << 8) | (uint32(b[2]) << 16) | (uint32(b[3]) << 24) + id = uint32(b[0]) | (uint32(b[1]) << 8) | (uint32(b[2]) << 16) | (uint32(b[3]) << 24) } if debug { - println("Dict size", size, "ID:", d.DictionaryID) + println("Dict size", size, "ID:", id) } - if d.DictionaryID != 0 { - return ErrUnknownDictionary + if id > 0 { + // ID 0 means "sorry, no dictionary anyway". + // https://github.com/facebook/zstd/blob/dev/doc/zstd_compression_format.md#dictionary-format + d.DictionaryID = &id } } @@ -351,8 +354,6 @@ func (d *frameDec) initAsync() { // When the frame has finished decoding the *bufio.Reader // containing the remaining input will be sent on frameDec.frameDone. func (d *frameDec) startDecoder(output chan decodeOutput) { - // TODO: Init to dictionary - d.history.reset() written := int64(0) defer func() { @@ -445,8 +446,6 @@ func (d *frameDec) startDecoder(output chan decodeOutput) { // runDecoder will create a sync decoder that will decode a block of data. func (d *frameDec) runDecoder(dst []byte, dec *blockDec) ([]byte, error) { - // TODO: Init to dictionary - d.history.reset() saved := d.history.b // We use the history for output to avoid copying it. |