g">Parameters:</span></dt><dd><code>buffer</code> - the text content to match against, do not change</dd><dd><code>pos</code> - the starting position for the match, valid for buffer</dd><dd><code>bufferStart</code> - the first active index in the buffer, valid for buffer</dd><dd><code>bufferEnd</code> - the end index (exclusive) of the active buffer, valid for buffer</dd>
<dt><span class="strong">Returns:</span></dt><dd>the number of matching characters, zero for no match</dd></dl>
</li>
</ul>
<a name="isMa