Place more data from the source stream into this buffer, and return the number of bytes added. This does not compress the current buffer content, so consider doing that explicitly.
Number of bytes added, which will be Eof when there is no further input available. Zero is also a valid response, meaning no data was actually added.
See Implementation
Place more data from the source stream into this buffer, and return the number of bytes added. This does not compress the current buffer content, so consider doing that explicitly.