示例#1
0
func (me *store) OpenTorrentData(info *metainfo.Info) (ret *data) {
	ret = &data{info, me}
	for i := range iter.N(info.NumPieces()) {
		go ret.PieceComplete(i)
	}
	return
}
示例#2
0
func TorrentData(md *metainfo.Info, location string) (ret *torrentData, err error) {
	var mms mmap_span.MMapSpan
	defer func() {
		if err != nil {
			mms.Close()
		}
	}()
	for _, miFile := range md.UpvertedFiles() {
		fileName := filepath.Join(append([]string{location, md.Name}, miFile.Path...)...)
		err = os.MkdirAll(filepath.Dir(fileName), 0777)
		if err != nil {
			err = fmt.Errorf("error creating data directory %q: %s", filepath.Dir(fileName), err)
			return
		}
		var file *os.File
		file, err = os.OpenFile(fileName, os.O_CREATE|os.O_RDWR, 0666)
		if err != nil {
			return
		}
		func() {
			defer file.Close()
			var fi os.FileInfo
			fi, err = file.Stat()
			if err != nil {
				return
			}
			if fi.Size() < miFile.Length {
				err = file.Truncate(miFile.Length)
				if err != nil {
					return
				}
			}
			if miFile.Length == 0 {
				// Can't mmap() regions with length 0.
				return
			}
			var mMap mmap.MMap
			mMap, err = mmap.MapRegion(file,
				int(miFile.Length), // Probably not great on <64 bit systems.
				mmap.RDWR, 0, 0)
			if err != nil {
				err = fmt.Errorf("error mapping file %q, length %d: %s", file.Name(), miFile.Length, err)
				return
			}
			if int64(len(mMap)) != miFile.Length {
				panic("mmap has wrong length")
			}
			mms.Append(mMap)
		}()
		if err != nil {
			return
		}
	}
	ret = &torrentData{
		MMapSpan:  mms,
		completed: make([]bool, md.NumPieces()),
	}
	return
}
示例#3
0
文件: misc.go 项目: gbjk/torrent
func validateInfo(info *metainfo.Info) error {
	if len(info.Pieces)%20 != 0 {
		return errors.New("pieces has invalid length")
	}
	if int((info.TotalLength()+info.PieceLength-1)/info.PieceLength) != info.NumPieces() {
		return errors.New("piece count and file lengths are at odds")
	}
	return nil
}
示例#4
0
func TorrentData(md *metainfo.Info, location string) data {
	return data{md, location, make([]bool, md.NumPieces())}
}