yencode_step

Performs an yEncode 'encode step' on a chunk of raw data of length inlen pointed to by in and writes to out.

state should be initialized to MIME_YENCODE_STATE_INIT before beginning making the first call to this function. Subsequent calls should reuse state.

Along the same lines, pcrc and crc should be initialized to MIME_YENCODE_CRC_INIT before using.

Parameters:

state	yencode state
pcrc	part crc state
crc	crc state
in	input buffer
inlen	input buffer length
out	output buffer

Returns:

the number of bytes encoded