lass="w">   </span><span class="n">token_end</span><span class="o">=</span><span class="n">token_start</span><span class="w"></span>
<span class="w">   </span><span class="k">do while</span><span class="w"> </span><span class="p">(</span><span class="n">token_end</span><span class="w">  </span><span class="o">&lt;=</span><span class="w">  </span><span class="n">isource_len</span><span class="o">-</span><span class="mi">1</span><span class="p">)</span><span class="w">                         </span><span cla