zzip_file_read functions read data from zip-contained file.
It works like
read(2) and will fill the given buffer with bytes from
the opened file. It will return the number of bytes read, so if the
is encountered you will be prompted with the number of bytes actually read.
This is the routines that needs the
buf32k buffer, and it would have
need for much more polishing but it does already work quite well.
Note: the 32K buffer is rather big. The original inflate-algorithm required just that but the latest zlib would work just fine with a smaller buffer.