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<title>read (PacketIO)</title>
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<pre><span class="ruby-comment cmt"># File lib/network/packetio.rb, line 43</span>
<span class="ruby-keyword kw">def</span> <span class="ruby-identifier">read</span>
<span class="ruby-ivar">@inbuffer</span> <span class="ruby-operator"><<</span> <span class="ruby-ivar">@sock</span>.<span class="ruby-identifier">recv</span>(<span class="ruby-ivar">@bufsize</span>)
<span class="ruby-keyword kw">if</span> <span class="ruby-operator">!</span><span class="ruby-ivar">@prefix_found</span>
<span class="ruby-comment cmt"># start of packet</span>
<span class="ruby-keyword kw">if</span> <span class="ruby-ivar">@inbuffer</span>.<span class="ruby-identifier">size</span> <span class="ruby-operator">>=</span> <span class="ruby-value">4</span>
<span class="ruby-identifier">sizest</span> = <span class="ruby-ivar">@inbuffer</span>.<span class="ruby-identifier">slice!</span>(<span class="ruby-value">0</span><span class="ruby-operator">..</span><span class="ruby-value">3</span>)
<span class="ruby-ivar">@packet_size</span> = <span class="ruby-identifier">sizest</span>.<span class="ruby-identifier">unpack</span>(<span class="ruby-value str">"N"</span>)[<span class="ruby-value">0</span>]
<span class="ruby-ivar">@prefix_found</span> = <span class="ruby-keyword kw">true</span>
<span class="ruby-keyword kw">if</span> <span class="ruby-ivar">@packet_size</span> <span class="ruby-operator">></span> <span class="ruby-ivar">@bufsize</span>
<span class="ruby-ivar">@inbuffer</span> = <span class="ruby-value str">""</span>
<span class="ruby-ivar">@packet_size</span> = <span class="ruby-value">0</span>
<span class="ruby-ivar">@prefix_found</span> = <span class="ruby-keyword kw">false</span>
<span class="ruby-identifier">log</span>.<span class="ruby-identifier">warn</span> <span class="ruby-node">"Discarding packet: Buffer size exceeded (PACKETSIZE=#{@packet_size} STRING='#{sizest}')"</span>
<span class="ruby-keyword kw">return</span> <span class="ruby-keyword kw">nil</span>
<span class="ruby-keyword kw">end</span>
<span class="ruby-keyword kw">else</span>
<span class="ruby-keyword kw">return</span> <span class="ruby-keyword kw">nil</span> <span class="ruby-comment cmt"># not enough data yet</span>
<span class="ruby-keyword kw">end</span>
<span class="ruby-keyword kw">end</span>
<span class="ruby-keyword kw">if</span> <span class="ruby-ivar">@prefix_found</span>
<span class="ruby-keyword kw">if</span> <span class="ruby-ivar">@inbuffer</span>.<span class="ruby-identifier">size</span> <span class="ruby-operator">>=</span> <span class="ruby-ivar">@packet_size</span>
<span class="ruby-comment cmt"># We have it</span>
<span class="ruby-ivar">@prefix_found</span> = <span class="ruby-keyword kw">false</span>
<span class="ruby-identifier">ps</span> = <span class="ruby-ivar">@packet_size</span>
<span class="ruby-ivar">@packet_size</span> = <span class="ruby-value">0</span>
<span class="ruby-keyword kw">return</span> <span class="ruby-ivar">@inbuffer</span>.<span class="ruby-identifier">slice!</span>(<span class="ruby-value">0</span><span class="ruby-operator">...</span><span class="ruby-identifier">ps</span>).<span class="ruby-identifier">chop</span> <span class="ruby-comment cmt"># chop off NUL</span>
<span class="ruby-keyword kw">else</span>
<span class="ruby-comment cmt"># Dont have it all yet.</span>
<span class="ruby-keyword kw">return</span> <span class="ruby-keyword kw">nil</span>
<span class="ruby-keyword kw">end</span>
<span class="ruby-keyword kw">end</span>
<span class="ruby-keyword kw">end</span></pre>
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