$this->_sheets[] = array('name' => $rec_name, 'offset' => $rec_offset, 'sheetState' => $sheetState, 'sheetType' => $sheetType);
}
/**
* Read EXTERNALBOOK record
*/
private function _readExternalBook()
{
$length = self::_GetInt2d($this->_data, $this->_pos + 2);
$recordData = substr($this->_data, $this->_pos + 4, $length);
// move stream pointer to next record
$this->_pos += 4 + $length;
// offset within record data
$offset = 0;
// there are 4 types of records
if (strlen($recordData) > 4) {
// external reference
// offset: 0; size: 2; number of sheet names ($nm)
$nm = self::_GetInt2d($recordData, 0);
$offset += 2;
// offset: 2; size: var; encoded URL without sheet name (Unicode string, 16-bit length)
