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).
input buffer
output buffer
holds the number of bits that are stored in save
leftover bits that have not yet been encoded
the number of bytes encoded.
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).