Encoding.base64EncodeStep

size_t base64EncodeStep(ubyte[] inbuf, ref ubyte[] outbuf, ref int state, ref uint save)

Base64 encodes a chunk of data. Performs an 'encode step', only encodes blocks of 3 characters to the output at a time, saves left-over state in state and save (initialise to 0 on first invocation).

Parameters

`inbuf`	input buffer
`outbuf`	output buffer
`state`	holds the number of bits that are stored in save
`save`	leftover bits that have not yet been encoded

Returns

the number of bytes encoded.