function _calcSize(&$raList) 
    {
        // Calculate Basic Setting
        list($iSBDcnt, $iBBcnt, $iPPScnt) = array(0,0,0);
        $iSmallLen = 0;
        $iSBcnt = 0;
        for ($i = 0; $i < count($raList); $i++) {
            if ($raList[$i]->Type == OLE_PPS_TYPE_FILE) {
                $raList[$i]->Size = $raList[$i]->_DataLen();
                if ($raList[$i]->Size < OLE_DATA_SIZE_SMALL) {
                    $iSBcnt += floor($raList[$i]->Size / $this->_SMALL_BLOCK_SIZE)
                                  + (($raList[$i]->Size % $this->_SMALL_BLOCK_SIZE)? 1: 0);
                } else {
                    $iBBcnt += (floor($raList[$i]->Size / $this->_BIG_BLOCK_SIZE) +
                        (($raList[$i]->Size % $this->_BIG_BLOCK_SIZE)? 1: 0));
                }
            }
        }
        $iSmallLen = $iSBcnt * $this->_SMALL_BLOCK_SIZE;
        $iSlCnt = floor($this->_BIG_BLOCK_SIZE / OLE_LONG_INT_SIZE);
        $iSBDcnt = floor($iSBcnt / $iSlCnt) + (($iSBcnt % $iSlCnt)? 1:0);
        $iBBcnt +=  (floor($iSmallLen / $this->_BIG_BLOCK_SIZE) +
                      (( $iSmallLen % $this->_BIG_BLOCK_SIZE)? 1: 0));
        $iCnt = count($raList);
        $iBdCnt = $this->_BIG_BLOCK_SIZE / OLE_PPS_SIZE;
        $iPPScnt = (floor($iCnt/$iBdCnt) + (($iCnt % $iBdCnt)? 1: 0));
   
        return array($iSBDcnt, $iBBcnt, $iPPScnt);
    }