TIdDecoder00E = class(TIdDecoder4to3);

TIdDecoder00E is a TIdDecoder4to3 descendant that implements an overridden Decode method to support decoding the length and content for the decoder. 

In the UUE and XXE encoding algorithms, the initial byte in the encoded values indicates the length of the encoded data stream. TIdDecoder00E implements a common routine to support the capability in both TIdDecoderUUE and TIdDecoderXXE.