c++ code review
<pre><code>if (ad &amp;&amp; (etag = strrcasestr_len(ad,strlen(ad),
                "&lt;/XHTML-STRIPONREPLY&gt;", 21))) {
</code></pre>

<p>here ad and etag are const char*</p>

<p>when the custom function strrcasestr_len returns NULL</p>

<p>will the expression evaluate to (ad &amp;&amp; null)</p>
