return err
	}
	sum, err := hex.DecodeString(info.Hash)
	if err != nil {
		return err
	}
	c.Algorithm = BitrotAlgorithmFromString(info.Algorithm)
	c.Hash = sum
	if _, err = fmt.Sscanf(info.Name, "part.%d", &c.PartNumber); err != nil {
		return err
	}

	if !c.Algorithm.Available() {
		internalLogIf(GlobalContext, errBitrotHashAlgoInvalid)
		return errBitrotHashAlgoInvalid
	}
	return nil

	i := len(dirPath)
	for i > 0 && os.IsPathSeparator(dirPath[i-1]) { // Skip trailing path separator.
		i--
	}

	j := i
	for j > 0 && !os.IsPathSeparator(dirPath[j-1]) { // Scan backward over element.
		j--
	}

	if j > 1 {
		// Create parent.
		if err := osMkdirAll(dirPath[:j-1], perm, baseDir); err != nil {
			return err
		}
	}