Enhancement : Merge two cbor streams

-- I am creating a new request as the previous question about 'multiple arrays' was closed.

Thanks for the reply. How about a cbor_encode_merge() function? It is essentially the same thing as you proposed. However this will be more generic. Sort of a strcat function; we can have two arrays managed separately in their own streams and can be merged later.
Let's assume stream 1 is open and stream 2 is closed, I would like to call something like
cbor_encode_merge(stream1, stream2)
which can copy the map from stream2 in to stream1's tail.