Method LoadFileData

par1/decoder.go:129–178

LoadFileData loads existing file data into memory.

()

// LoadFileData loads existing file data into memory.
func (d *Decoder) LoadFileData() error {
	fileData := make([][]byte, 0, len(d.indexVolume.entries))

	for i, entry := range d.indexVolume.entries {
		if !entry.header.Status.savedInVolumeSet() {
			continue
		}

		path, err := d.getFilePath(entry)
		if err != nil {
			return err
		}

		data, corrupt, err := func() ([]byte, bool, error) {
			data, err := d.fileIO.ReadFile(path)
			if os.IsNotExist(err) {
				return nil, true, err
			} else if err != nil {
				return nil, false, err
			} else if sixteenKHash(data) != entry.header.SixteenKHash {
				return nil, true, errors.New("hash mismatch (16k)")
			} else if md5.Sum(data) != entry.header.Hash {
				return nil, true, errors.New("hash mismatch")
			}
			return data, false, nil
		}()
		d.delegate.OnDataFileLoad(i+1, len(d.indexVolume.entries), path, len(data), corrupt, err)
		if corrupt {
			fileData = append(fileData, nil)
			continue
		} else if err != nil {
			return err
		}

		// We use nil to mark missing entries, but ReadFile
		// might return nil, so convert that to a non-nil
		// empty slice.
		if data == nil {
			data = make([]byte, 0)
		}
		fileData = append(fileData, data)
	}

	if len(fileData) == 0 {
		return errors.New("no file data found")
	}

	d.fileData = fileData
	return nil
}

func (d *Decoder) volumePath(volumeNumber uint64) string {
	if volumeNumber == 0 {