package torrent import ( "strings" "github.com/anacrolix/torrent/metainfo" ) // Provides access to regions of torrent data that correspond to its files. type File struct { t Torrent path string offset int64 length int64 fi metainfo.FileInfo } func (f *File) Torrent() Torrent { return f.t } // Data for this file begins this far into the torrent. func (f *File) Offset() int64 { return f.offset } func (f File) FileInfo() metainfo.FileInfo { return f.fi } func (f File) Path() string { return f.path } func (f *File) Length() int64 { return f.length } // The relative file path for a multi-file torrent, and the torrent name for a // single-file torrent. func (f *File) DisplayPath() string { fip := f.FileInfo().Path if len(fip) == 0 { return f.t.Info().Name } return strings.Join(fip, "/") } type FilePieceState struct { Bytes int64 // Bytes within the piece that are part of this File. PieceState } // Returns the state of pieces in this file. func (f *File) State() (ret []FilePieceState) { pieceSize := int64(f.t.torrent.usualPieceSize()) off := f.offset % pieceSize remaining := f.length for i := int(f.offset / pieceSize); ; i++ { if remaining == 0 { break } len1 := pieceSize - off if len1 > remaining { len1 = remaining } f.t.cl.mu.RLock() ps := f.t.torrent.pieceState(i) f.t.cl.mu.RUnlock() ret = append(ret, FilePieceState{len1, ps}) off = 0 remaining -= len1 } return } func (f *File) Download() { f.t.DownloadPieces(f.t.torrent.byteRegionPieces(f.offset, f.length)) }