1 //go:build !noboltdb && !wasm
11 "github.com/anacrolix/torrent/metainfo"
14 type boltPiece struct {
22 _ PieceImpl = (*boltPiece)(nil)
23 dataBucketKey = []byte("data")
26 func (me *boltPiece) pc() PieceCompletionGetSetter {
27 return boltPieceCompletion{me.db}
30 func (me *boltPiece) pk() metainfo.PieceKey {
31 return metainfo.PieceKey{me.ih, me.p.Index()}
34 func (me *boltPiece) Completion() Completion {
35 c, err := me.pc().Get(me.pk())
37 case bbolt.ErrDatabaseNotOpen:
46 func (me *boltPiece) MarkComplete() error {
47 return me.pc().Set(me.pk(), true)
50 func (me *boltPiece) MarkNotComplete() error {
51 return me.pc().Set(me.pk(), false)
53 func (me *boltPiece) ReadAt(b []byte, off int64) (n int, err error) {
54 err = me.db.View(func(tx *bbolt.Tx) error {
55 db := tx.Bucket(dataBucketKey)
62 ck := me.chunkKey(int(ci))
64 // If the chunk is the wrong size, assume it's missing as we can't rely on the data.
65 if len(_b) != chunkSize {
68 n1 := copy(b, _b[off:])
79 func (me *boltPiece) chunkKey(index int) (ret [26]byte) {
80 copy(ret[:], me.key[:])
81 binary.BigEndian.PutUint16(ret[24:], uint16(index))
85 func (me *boltPiece) WriteAt(b []byte, off int64) (n int, err error) {
86 err = me.db.Update(func(tx *bbolt.Tx) error {
87 db, err := tx.CreateBucketIfNotExists(dataBucketKey)
94 _b := make([]byte, chunkSize)
95 ck := me.chunkKey(int(ci))
96 copy(_b, db.Get(ck[:]))
97 n1 := copy(_b[off:], b)