case TypeReg, TypeChar, TypeBlock, TypeFifo, TypeGNUSparse:
		// Exclude TypeLink and TypeSymlink, since they may reference directories.
		if strings.HasSuffix(h.Name, "/") {
			return FormatUnknown, nil, headerError{"filename may not have trailing slash"}
		}
	case TypeXHeader, TypeGNULongName, TypeGNULongLink:
		return FormatUnknown, nil, headerError{"cannot manually encode TypeXHeader, TypeGNULongName, or TypeGNULongLink headers"}