Decode decodes src into dst, returning both the number of bytes written to dst and the number consumed from src.

Encode encodes src into at most [MaxEncodedLen](len(src)) bytes of dst, returning the actual number of bytes written.

MaxEncodedLen returns the maximum length of an encoding of n source bytes.

NewDecoder constructs a new ascii85 stream decoder.

NewEncoder returns a new ascii85 stream encoder.