span> <span class="special">&amp;</span><span class="identifier">offset_</span><span class="special">,</span> <span class="number">65536</span><span class="special">);</span>
        <span class="identifier">ec</span> <span class="special">=</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">system</span><span class="special">::</span><span class="identifier">error_code</span><span class="special">(</span><span class="identifier">n</span> <span class="special