Decode an encoded string.

DecodeBytes will decode raw id and data values.

Encode will encode the string and return a base64 (url) compatible version of it.

EncodeBytes will compress the given string and return a table identifier and a payload.

ErrCorrupted is returned if a provided encoded filename cannot be decoded.

ErrUnsupported is returned if a provided encoding may come from a future version or the file name is corrupt.