torrent/metainfo/piece.go

29 lines
502 B
Go

package metainfo
import "github.com/anacrolix/missinggo"
type Piece struct {
Info *Info
i int
}
func (p Piece) Length() int64 {
if p.i == p.Info.NumPieces()-1 {
return p.Info.TotalLength() - int64(p.i)*p.Info.PieceLength
}
return p.Info.PieceLength
}
func (p Piece) Offset() int64 {
return int64(p.i) * p.Info.PieceLength
}
func (p Piece) Hash() (ret Hash) {
missinggo.CopyExact(&ret, p.Info.Pieces[p.i*HashSize:(p.i+1)*HashSize])
return
}
func (p Piece) Index() int {
return p.i
}