td class="paramname">len</td><td>length of the coded raw data (zero is valid, e.g. empty string!) </td></tr>
    <tr><td class="paramname">buf</td><td>return raw bytes </td></tr>
    <tr><td class="paramname">buf_len</td><td>returns length of the raw return value </td></tr>
    <tr><td class="paramname">buf_max_len</td><td>buffer size </td></tr>
  </table>
  </dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>ERR_OK if successful, ERR_ARG if we can't (or won't) decode </dd></dl>

</div>
</div>
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