func (w *Writer) writeFile(nd *mdag.Node, pb *upb.Data, fpath string) error {
if err := writeFileHeader(w.TarW, fpath, pb.GetFilesize()); err != nil {
return err
}
dagr := uio.NewDataFileReader(w.ctx, nd, pb, w.Dag)
if _, err := dagr.WriteTo(w.TarW); err != nil {
return err
}
w.TarW.Flush()
return nil
}
func FSNodeFromBytes(b []byte) (*FSNode, error) {
pbn := new(pb.Data)
err := proto.Unmarshal(b, pbn)
if err != nil {
return nil, err
}
n := new(FSNode)
n.Data = pbn.Data
n.blocksizes = pbn.Blocksizes
n.subtotal = pbn.GetFilesize() - uint64(len(n.Data))
n.Type = pbn.GetType()
return n, nil
}
func DataSize(data []byte) (uint64, error) {
pbdata := new(pb.Data)
err := proto.Unmarshal(data, pbdata)
if err != nil {
return 0, err
}
switch pbdata.GetType() {
case pb.Data_Directory:
return 0, errors.New("Cant get data size of directory!")
case pb.Data_File:
return pbdata.GetFilesize(), nil
case pb.Data_Raw:
return uint64(len(pbdata.GetData())), nil
default:
return 0, errors.New("Unrecognized node data type!")
}
}