package metainfo import ( "github.com/anacrolix/missinggo/v2" ) type Piece struct { Info *Info // Can we embed the fields here instead, or is it something to do with saving memory? i pieceIndex } type pieceIndex = int func (p Piece) Length() int64 { if int(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() pieceIndex { return p.i }