    (void)deflateEnd(&amp;strm);
            return Z_ERRNO;
        }
        flush = feof(source) ? Z_FINISH : Z_NO_FLUSH;
        strm.next_in = in;
</b></pre><!-- -->
The inner <tt>do</tt>-loop passes our chunk of input data to <tt>deflate()</tt>, and then
keeps calling <tt>deflate()</tt> until it is done producing output.  Once there is no more
new output, <tt>deflate()</tt> is guaranteed to have consumed all of the input, i.e.,
<tt>avail_in</tt> will be zero.
<pre><b>
        /* run deflate() on input