
 </tr>
 <tr>
  <td>-1</td>
  <td>A string, which contains the &lt;sub-string&gt; beginning at the &lt;pos&gt;th character, has been received, and saved in the "inputstr", but its length is less than &lt;len&gt; because of the timeout.</td>
 </tr>
 <tr>
  <td>0</td>
  <td>Timeout. No string, which satisfies the condition, has been received.</td>
 </tr>
 <tr>
  <td>1</td>
  <td>A string, which satisfies the condition, has been received, and saved in the "inputstr".</td>
 </tr>
</table>


<h2>