forked from anacrolix/torrent
/
file_storage_piece.go
60 lines (52 loc) · 1.3 KB
/
file_storage_piece.go
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package storage
import (
"io"
"os"
"github.com/anacrolix/torrent/metainfo"
)
type fileStoragePiece struct {
*fileTorrentImpl
p metainfo.Piece
io.WriterAt
io.ReaderAt
}
func (me *fileStoragePiece) pieceKey() metainfo.PieceKey {
return metainfo.PieceKey{me.infoHash, me.p.Index()}
}
func (fs *fileStoragePiece) GetIsComplete() bool {
ret, err := fs.completion.Get(fs.pieceKey())
if err != nil || !ret {
return false
}
// If it's allegedly complete, check that its constituent files have the
// necessary length.
for _, fi := range extentCompleteRequiredLengths(fs.p.Info, fs.p.Offset(), fs.p.Length()) {
s, err := os.Stat(fs.fileInfoName(fi))
if err != nil || s.Size() < fi.Length {
ret = false
break
}
}
if ret {
return true
}
// The completion was wrong, fix it.
fs.completion.Set(fs.pieceKey(), false)
return false
}
func (fs *fileStoragePiece) MarkComplete() error {
fs.completion.Set(fs.pieceKey(), true)
return nil
}
func (fs *fileStoragePiece) MarkNotComplete() error {
fs.completion.Set(fs.pieceKey(), false)
return nil
}
func (fs *fileStoragePiece) DeletePiece(chunks int) (int64, error) {
filename := fs.fileTorrentImpl.fs.baseDir + fs.fileTorrentImpl.info.Name
stat, err := os.Stat(filename)
if err != nil {
return 0, err
}
return stat.Size(), os.Remove(filename)
}