Excel5.php

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<?php
// Original file header of ParseXL (used as the base for this class):
// --------------------------------------------------------------------------------
// Adapted from Excel_Spreadsheet_Reader developed by users bizon153,
// trex005, and mmp11 (SourceForge.net)
// http://sourceforge.net/projects/phpexcelreader/
// Primary changes made by canyoncasa (dvc) for ParseXL 1.00 ...
//       Modelled moreso after Perl Excel Parse/Write modules
//       Added Parse_Excel_Spreadsheet object
//               Reads a whole worksheet or tab as row,column array or as
//               associated hash of indexed rows and named column fields
//       Added variables for worksheet (tab) indexes and names
//       Added an object call for loading individual woorksheets
//       Changed default indexing defaults to 0 based arrays
//       Fixed date/time and percent formats
//       Includes patches found at SourceForge...
//               unicode patch by nobody
//               unpack("d") machine depedency patch by matchy
//               boundsheet utf16 patch by bjaenichen
//       Renamed functions for shorter names
//       General code cleanup and rigor, including <80 column width
//       Included a testcase Excel file and PHP example calls
//       Code works for PHP 5.x

// Primary changes made by canyoncasa (dvc) for ParseXL 1.10 ...
// http://sourceforge.net/tracker/index.php?func=detail&aid=1466964&group_id=99160&atid=623334
//       Decoding of formula conditions, results, and tokens.
//       Support for user-defined named cells added as an array "namedcells"
//               Patch code for user-defined named cells supports single cells only.
//               NOTE: this patch only works for BIFF8 as BIFF5-7 use a different
//               external sheet reference structure


if (!defined('PHPEXCEL_ROOT')) {
        define('PHPEXCEL_ROOT', dirname(__FILE__) . '/../../');
        require(PHPEXCEL_ROOT . 'PHPExcel/Autoloader.php');
}

class PHPExcel_Reader_Excel5 extends PHPExcel_Reader_Abstract implements PHPExcel_Reader_IReader
{
        // ParseXL definitions
        const XLS_BIFF8                                         = 0x0600;
        const XLS_BIFF7                                         = 0x0500;
        const XLS_WorkbookGlobals                       = 0x0005;
        const XLS_Worksheet                                     = 0x0010;

        // record identifiers
        const XLS_Type_FORMULA                          = 0x0006;
        const XLS_Type_EOF                                      = 0x000a;
        const XLS_Type_PROTECT                          = 0x0012;
        const XLS_Type_OBJECTPROTECT            = 0x0063;
        const XLS_Type_SCENPROTECT                      = 0x00dd;
        const XLS_Type_PASSWORD                         = 0x0013;
        const XLS_Type_HEADER                           = 0x0014;
        const XLS_Type_FOOTER                           = 0x0015;
        const XLS_Type_EXTERNSHEET                      = 0x0017;
        const XLS_Type_DEFINEDNAME                      = 0x0018;
        const XLS_Type_VERTICALPAGEBREAKS       = 0x001a;
        const XLS_Type_HORIZONTALPAGEBREAKS     = 0x001b;
        const XLS_Type_NOTE                                     = 0x001c;
        const XLS_Type_SELECTION                        = 0x001d;
        const XLS_Type_DATEMODE                         = 0x0022;
        const XLS_Type_EXTERNNAME                       = 0x0023;
        const XLS_Type_LEFTMARGIN                       = 0x0026;
        const XLS_Type_RIGHTMARGIN                      = 0x0027;
        const XLS_Type_TOPMARGIN                        = 0x0028;
        const XLS_Type_BOTTOMMARGIN                     = 0x0029;
        const XLS_Type_PRINTGRIDLINES           = 0x002b;
        const XLS_Type_FILEPASS                         = 0x002f;
        const XLS_Type_FONT                                     = 0x0031;
        const XLS_Type_CONTINUE                         = 0x003c;
        const XLS_Type_PANE                                     = 0x0041;
        const XLS_Type_CODEPAGE                         = 0x0042;
        const XLS_Type_DEFCOLWIDTH                      = 0x0055;
        const XLS_Type_OBJ                                      = 0x005d;
        const XLS_Type_COLINFO                          = 0x007d;
        const XLS_Type_IMDATA                           = 0x007f;
        const XLS_Type_SHEETPR                          = 0x0081;
        const XLS_Type_HCENTER                          = 0x0083;
        const XLS_Type_VCENTER                          = 0x0084;
        const XLS_Type_SHEET                            = 0x0085;
        const XLS_Type_PALETTE                          = 0x0092;
        const XLS_Type_SCL                                      = 0x00a0;
        const XLS_Type_PAGESETUP                        = 0x00a1;
        const XLS_Type_MULRK                            = 0x00bd;
        const XLS_Type_MULBLANK                         = 0x00be;
        const XLS_Type_DBCELL                           = 0x00d7;
        const XLS_Type_XF                                       = 0x00e0;
        const XLS_Type_MERGEDCELLS                      = 0x00e5;
        const XLS_Type_MSODRAWINGGROUP          = 0x00eb;
        const XLS_Type_MSODRAWING                       = 0x00ec;
        const XLS_Type_SST                                      = 0x00fc;
        const XLS_Type_LABELSST                         = 0x00fd;
        const XLS_Type_EXTSST                           = 0x00ff;
        const XLS_Type_EXTERNALBOOK                     = 0x01ae;
        const XLS_Type_DATAVALIDATIONS          = 0x01b2;
        const XLS_Type_TXO                                      = 0x01b6;
        const XLS_Type_HYPERLINK                        = 0x01b8;
        const XLS_Type_DATAVALIDATION           = 0x01be;
        const XLS_Type_DIMENSION                        = 0x0200;
        const XLS_Type_BLANK                            = 0x0201;
        const XLS_Type_NUMBER                           = 0x0203;
        const XLS_Type_LABEL                            = 0x0204;
        const XLS_Type_BOOLERR                          = 0x0205;
        const XLS_Type_STRING                           = 0x0207;
        const XLS_Type_ROW                                      = 0x0208;
        const XLS_Type_INDEX                            = 0x020b;
        const XLS_Type_ARRAY                            = 0x0221;
        const XLS_Type_DEFAULTROWHEIGHT         = 0x0225;
        const XLS_Type_WINDOW2                          = 0x023e;
        const XLS_Type_RK                                       = 0x027e;
        const XLS_Type_STYLE                            = 0x0293;
        const XLS_Type_FORMAT                           = 0x041e;
        const XLS_Type_SHAREDFMLA                       = 0x04bc;
        const XLS_Type_BOF                                      = 0x0809;
        const XLS_Type_SHEETPROTECTION          = 0x0867;
        const XLS_Type_RANGEPROTECTION          = 0x0868;
        const XLS_Type_SHEETLAYOUT                      = 0x0862;
        const XLS_Type_XFEXT                            = 0x087d;
        const XLS_Type_PAGELAYOUTVIEW           = 0x088b;
        const XLS_Type_UNKNOWN                          = 0xffff;

        // Encryption type
        const MS_BIFF_CRYPTO_NONE = 0;
        const MS_BIFF_CRYPTO_XOR  = 1;
        const MS_BIFF_CRYPTO_RC4  = 2;
        
        // Size of stream blocks when using RC4 encryption
        const REKEY_BLOCK = 0x400;

        private $_summaryInformation;

        private $_documentSummaryInformation;

        private $_userDefinedProperties;

        private $_data;

        private $_dataSize;

        private $_pos;

        private $_phpExcel;

        private $_phpSheet;

        private $_version;

        private $_codepage;

        private $_formats;

        private $_objFonts;

        private $_palette;

        private $_sheets;

        private $_externalBooks;

        private $_ref;

        private $_externalNames;

        private $_definedname;

        private $_sst;

        private $_frozen;

        private $_isFitToPages;

        private $_objs;

        private $_textObjects;

        private $_cellNotes;

        private $_drawingGroupData;

        private $_drawingData;

        private $_xfIndex;

        private $_mapCellXfIndex;

        private $_mapCellStyleXfIndex;

        private $_sharedFormulas;

        private $_sharedFormulaParts;

        private $_encryption = 0;
        
        private $_encryptionStartPos = false;

        private $_rc4Key = null;

        private $_rc4Pos = 0;

        private $_md5Ctxt = null;

        public function __construct() {
                $this->_readFilter = new PHPExcel_Reader_DefaultReadFilter();
        }


        public function canRead($pFilename)
        {
                // Check if file exists
                if (!file_exists($pFilename)) {
                        throw new PHPExcel_Reader_Exception("Could not open " . $pFilename . " for reading! File does not exist.");
                }

                try {
                        // Use ParseXL for the hard work.
                        $ole = new PHPExcel_Shared_OLERead();

                        // get excel data
                        $res = $ole->read($pFilename);
                        return true;
                } catch (PHPExcel_Exception $e) {
                        return false;
                }
        }


        public function listWorksheetNames($pFilename)
        {
                // Check if file exists
                if (!file_exists($pFilename)) {
                        throw new PHPExcel_Reader_Exception("Could not open " . $pFilename . " for reading! File does not exist.");
                }

                $worksheetNames = array();

                // Read the OLE file
                $this->_loadOLE($pFilename);

                // total byte size of Excel data (workbook global substream + sheet substreams)
                $this->_dataSize = strlen($this->_data);

                $this->_pos             = 0;
                $this->_sheets  = array();

                // Parse Workbook Global Substream
                while ($this->_pos < $this->_dataSize) {
                        $code = self::_GetInt2d($this->_data, $this->_pos);

                        switch ($code) {
                                case self::XLS_Type_BOF:        $this->_readBof();              break;
                                case self::XLS_Type_SHEET:      $this->_readSheet();    break;
                                case self::XLS_Type_EOF:        $this->_readDefault();  break 2;
                                default:                                        $this->_readDefault();  break;
                        }
                }

                foreach ($this->_sheets as $sheet) {
                        if ($sheet['sheetType'] != 0x00) {
                                // 0x00: Worksheet, 0x02: Chart, 0x06: Visual Basic module
                                continue;
                        }

                        $worksheetNames[] = $sheet['name'];
                }

                return $worksheetNames;
        }


        public function listWorksheetInfo($pFilename)
        {
                // Check if file exists
                if (!file_exists($pFilename)) {
                        throw new PHPExcel_Reader_Exception("Could not open " . $pFilename . " for reading! File does not exist.");
                }

                $worksheetInfo = array();

                // Read the OLE file
                $this->_loadOLE($pFilename);

                // total byte size of Excel data (workbook global substream + sheet substreams)
                $this->_dataSize = strlen($this->_data);

                // initialize
                $this->_pos    = 0;
                $this->_sheets = array();

                // Parse Workbook Global Substream
                while ($this->_pos < $this->_dataSize) {
                        $code = self::_GetInt2d($this->_data, $this->_pos);

                        switch ($code) {
                                case self::XLS_Type_BOF:        $this->_readBof();        break;
                                case self::XLS_Type_SHEET:      $this->_readSheet();      break;
                                case self::XLS_Type_EOF:        $this->_readDefault();    break 2;
                                default:                        $this->_readDefault();    break;
                        }
                }

                // Parse the individual sheets
                foreach ($this->_sheets as $sheet) {

                        if ($sheet['sheetType'] != 0x00) {
                                // 0x00: Worksheet
                                // 0x02: Chart
                                // 0x06: Visual Basic module
                                continue;
                        }

                        $tmpInfo = array();
                        $tmpInfo['worksheetName'] = $sheet['name'];
                        $tmpInfo['lastColumnLetter'] = 'A';
                        $tmpInfo['lastColumnIndex'] = 0;
                        $tmpInfo['totalRows'] = 0;
                        $tmpInfo['totalColumns'] = 0;

                        $this->_pos = $sheet['offset'];

                        while ($this->_pos <= $this->_dataSize - 4) {
                                $code = self::_GetInt2d($this->_data, $this->_pos);

                                switch ($code) {
                                        case self::XLS_Type_RK:
                                        case self::XLS_Type_LABELSST:
                                        case self::XLS_Type_NUMBER:
                                        case self::XLS_Type_FORMULA:
                                        case self::XLS_Type_BOOLERR:
                                        case self::XLS_Type_LABEL:
                                                $length = self::_GetInt2d($this->_data, $this->_pos + 2);
                                                $recordData = $this->_readRecordData($this->_data, $this->_pos + 4, $length);

                                                // move stream pointer to next record
                                                $this->_pos += 4 + $length;

                                                $rowIndex = self::_GetInt2d($recordData, 0) + 1;
                                                $columnIndex = self::_GetInt2d($recordData, 2);

                                                $tmpInfo['totalRows'] = max($tmpInfo['totalRows'], $rowIndex);
                                                $tmpInfo['lastColumnIndex'] = max($tmpInfo['lastColumnIndex'], $columnIndex);
                                                break;
                                        case self::XLS_Type_BOF:      $this->_readBof();          break;
                                        case self::XLS_Type_EOF:      $this->_readDefault();      break 2;
                                        default:                      $this->_readDefault();      break;
                                }
                        }

                        $tmpInfo['lastColumnLetter'] = PHPExcel_Cell::stringFromColumnIndex($tmpInfo['lastColumnIndex']);
                        $tmpInfo['totalColumns'] = $tmpInfo['lastColumnIndex'] + 1;

                        $worksheetInfo[] = $tmpInfo;
                }

                return $worksheetInfo;
        }


        public function load($pFilename)
        {
                // Read the OLE file
                $this->_loadOLE($pFilename);

                // Initialisations
                $this->_phpExcel = new PHPExcel;
                $this->_phpExcel->removeSheetByIndex(0); // remove 1st sheet
                if (!$this->_readDataOnly) {
                        $this->_phpExcel->removeCellStyleXfByIndex(0); // remove the default style
                        $this->_phpExcel->removeCellXfByIndex(0); // remove the default style
                }

                // Read the summary information stream (containing meta data)
                $this->_readSummaryInformation();

                // Read the Additional document summary information stream (containing application-specific meta data)
                $this->_readDocumentSummaryInformation();

                // total byte size of Excel data (workbook global substream + sheet substreams)
                $this->_dataSize = strlen($this->_data);

                // initialize
                $this->_pos                                     = 0;
                $this->_codepage                        = 'CP1252';
                $this->_formats                         = array();
                $this->_objFonts                        = array();
                $this->_palette                         = array();
                $this->_sheets                          = array();
                $this->_externalBooks           = array();
                $this->_ref                                     = array();
                $this->_definedname                     = array();
                $this->_sst                                     = array();
                $this->_drawingGroupData        = '';
                $this->_xfIndex                         = '';
                $this->_mapCellXfIndex          = array();
                $this->_mapCellStyleXfIndex     = array();

                // Parse Workbook Global Substream
                while ($this->_pos < $this->_dataSize) {
                        $code = self::_GetInt2d($this->_data, $this->_pos);

                        switch ($code) {
                                case self::XLS_Type_BOF:                        $this->_readBof();                              break;
                                case self::XLS_Type_FILEPASS:           $this->_readFilepass();                 break;
                                case self::XLS_Type_CODEPAGE:           $this->_readCodepage();                 break;
                                case self::XLS_Type_DATEMODE:           $this->_readDateMode();                 break;
                                case self::XLS_Type_FONT:                       $this->_readFont();                             break;
                                case self::XLS_Type_FORMAT:                     $this->_readFormat();                   break;
                                case self::XLS_Type_XF:                         $this->_readXf();                               break;
                                case self::XLS_Type_XFEXT:                      $this->_readXfExt();                    break;
                                case self::XLS_Type_STYLE:                      $this->_readStyle();                    break;
                                case self::XLS_Type_PALETTE:            $this->_readPalette();                  break;
                                case self::XLS_Type_SHEET:                      $this->_readSheet();                    break;
                                case self::XLS_Type_EXTERNALBOOK:       $this->_readExternalBook();             break;
                                case self::XLS_Type_EXTERNNAME:         $this->_readExternName();               break;
                                case self::XLS_Type_EXTERNSHEET:        $this->_readExternSheet();              break;
                                case self::XLS_Type_DEFINEDNAME:        $this->_readDefinedName();              break;
                                case self::XLS_Type_MSODRAWINGGROUP:    $this->_readMsoDrawingGroup();  break;
                                case self::XLS_Type_SST:                        $this->_readSst();                              break;
                                case self::XLS_Type_EOF:                        $this->_readDefault();                  break 2;
                                default:                                                        $this->_readDefault();                  break;
                        }
                }

                // Resolve indexed colors for font, fill, and border colors
                // Cannot be resolved already in XF record, because PALETTE record comes afterwards
                if (!$this->_readDataOnly) {
                        foreach ($this->_objFonts as $objFont) {
                                if (isset($objFont->colorIndex)) {
                                        $color = self::_readColor($objFont->colorIndex,$this->_palette,$this->_version);
                                        $objFont->getColor()->setRGB($color['rgb']);
                                }
                        }

                        foreach ($this->_phpExcel->getCellXfCollection() as $objStyle) {
                                // fill start and end color
                                $fill = $objStyle->getFill();

                                if (isset($fill->startcolorIndex)) {
                                        $startColor = self::_readColor($fill->startcolorIndex,$this->_palette,$this->_version);
                                        $fill->getStartColor()->setRGB($startColor['rgb']);
                                }

                                if (isset($fill->endcolorIndex)) {
                                        $endColor = self::_readColor($fill->endcolorIndex,$this->_palette,$this->_version);
                                        $fill->getEndColor()->setRGB($endColor['rgb']);
                                }

                                // border colors
                                $top      = $objStyle->getBorders()->getTop();
                                $right    = $objStyle->getBorders()->getRight();
                                $bottom   = $objStyle->getBorders()->getBottom();
                                $left     = $objStyle->getBorders()->getLeft();
                                $diagonal = $objStyle->getBorders()->getDiagonal();

                                if (isset($top->colorIndex)) {
                                        $borderTopColor = self::_readColor($top->colorIndex,$this->_palette,$this->_version);
                                        $top->getColor()->setRGB($borderTopColor['rgb']);
                                }

                                if (isset($right->colorIndex)) {
                                        $borderRightColor = self::_readColor($right->colorIndex,$this->_palette,$this->_version);
                                        $right->getColor()->setRGB($borderRightColor['rgb']);
                                }

                                if (isset($bottom->colorIndex)) {
                                        $borderBottomColor = self::_readColor($bottom->colorIndex,$this->_palette,$this->_version);
                                        $bottom->getColor()->setRGB($borderBottomColor['rgb']);
                                }

                                if (isset($left->colorIndex)) {
                                        $borderLeftColor = self::_readColor($left->colorIndex,$this->_palette,$this->_version);
                                        $left->getColor()->setRGB($borderLeftColor['rgb']);
                                }

                                if (isset($diagonal->colorIndex)) {
                                        $borderDiagonalColor = self::_readColor($diagonal->colorIndex,$this->_palette,$this->_version);
                                        $diagonal->getColor()->setRGB($borderDiagonalColor['rgb']);
                                }
                        }
                }

                // treat MSODRAWINGGROUP records, workbook-level Escher
                if (!$this->_readDataOnly && $this->_drawingGroupData) {
                        $escherWorkbook = new PHPExcel_Shared_Escher();
                        $reader = new PHPExcel_Reader_Excel5_Escher($escherWorkbook);
                        $escherWorkbook = $reader->load($this->_drawingGroupData);

                        // debug Escher stream
                        //$debug = new Debug_Escher(new PHPExcel_Shared_Escher());
                        //$debug->load($this->_drawingGroupData);
                }

                // Parse the individual sheets
                foreach ($this->_sheets as $sheet) {

                        if ($sheet['sheetType'] != 0x00) {
                                // 0x00: Worksheet, 0x02: Chart, 0x06: Visual Basic module
                                continue;
                        }

                        // check if sheet should be skipped
                        if (isset($this->_loadSheetsOnly) && !in_array($sheet['name'], $this->_loadSheetsOnly)) {
                                continue;
                        }

                        // add sheet to PHPExcel object
                        $this->_phpSheet = $this->_phpExcel->createSheet();
                        //      Use false for $updateFormulaCellReferences to prevent adjustment of worksheet references in formula
                        //              cells... during the load, all formulae should be correct, and we're simply bringing the worksheet
                        //              name in line with the formula, not the reverse
                        $this->_phpSheet->setTitle($sheet['name'],false);
                        $this->_phpSheet->setSheetState($sheet['sheetState']);

                        $this->_pos = $sheet['offset'];

                        // Initialize isFitToPages. May change after reading SHEETPR record.
                        $this->_isFitToPages = false;

                        // Initialize drawingData
                        $this->_drawingData = '';

                        // Initialize objs
                        $this->_objs = array();

                        // Initialize shared formula parts
                        $this->_sharedFormulaParts = array();

                        // Initialize shared formulas
                        $this->_sharedFormulas = array();

                        // Initialize text objs
                        $this->_textObjects = array();

                        // Initialize cell annotations
                        $this->_cellNotes = array();
                        $this->textObjRef = -1;

                        while ($this->_pos <= $this->_dataSize - 4) {
                                $code = self::_GetInt2d($this->_data, $this->_pos);

                                switch ($code) {
                                        case self::XLS_Type_BOF:                                        $this->_readBof();                                              break;
                                        case self::XLS_Type_PRINTGRIDLINES:                     $this->_readPrintGridlines();                   break;
                                        case self::XLS_Type_DEFAULTROWHEIGHT:           $this->_readDefaultRowHeight();                 break;
                                        case self::XLS_Type_SHEETPR:                            $this->_readSheetPr();                                  break;
                                        case self::XLS_Type_HORIZONTALPAGEBREAKS:       $this->_readHorizontalPageBreaks();             break;
                                        case self::XLS_Type_VERTICALPAGEBREAKS:         $this->_readVerticalPageBreaks();               break;
                                        case self::XLS_Type_HEADER:                                     $this->_readHeader();                                   break;
                                        case self::XLS_Type_FOOTER:                                     $this->_readFooter();                                   break;
                                        case self::XLS_Type_HCENTER:                            $this->_readHcenter();                                  break;
                                        case self::XLS_Type_VCENTER:                            $this->_readVcenter();                                  break;
                                        case self::XLS_Type_LEFTMARGIN:                         $this->_readLeftMargin();                               break;
                                        case self::XLS_Type_RIGHTMARGIN:                        $this->_readRightMargin();                              break;
                                        case self::XLS_Type_TOPMARGIN:                          $this->_readTopMargin();                                break;
                                        case self::XLS_Type_BOTTOMMARGIN:                       $this->_readBottomMargin();                             break;
                                        case self::XLS_Type_PAGESETUP:                          $this->_readPageSetup();                                break;
                                        case self::XLS_Type_PROTECT:                            $this->_readProtect();                                  break;
                                        case self::XLS_Type_SCENPROTECT:                        $this->_readScenProtect();                              break;
                                        case self::XLS_Type_OBJECTPROTECT:                      $this->_readObjectProtect();                    break;
                                        case self::XLS_Type_PASSWORD:                           $this->_readPassword();                                 break;
                                        case self::XLS_Type_DEFCOLWIDTH:                        $this->_readDefColWidth();                              break;
                                        case self::XLS_Type_COLINFO:                            $this->_readColInfo();                                  break;
                                        case self::XLS_Type_DIMENSION:                          $this->_readDefault();                                  break;
                                        case self::XLS_Type_ROW:                                        $this->_readRow();                                              break;
                                        case self::XLS_Type_DBCELL:                                     $this->_readDefault();                                  break;
                                        case self::XLS_Type_RK:                                         $this->_readRk();                                               break;
                                        case self::XLS_Type_LABELSST:                           $this->_readLabelSst();                                 break;
                                        case self::XLS_Type_MULRK:                                      $this->_readMulRk();                                    break;
                                        case self::XLS_Type_NUMBER:                                     $this->_readNumber();                                   break;
                                        case self::XLS_Type_FORMULA:                            $this->_readFormula();                                  break;
                                        case self::XLS_Type_SHAREDFMLA:                         $this->_readSharedFmla();                               break;
                                        case self::XLS_Type_BOOLERR:                            $this->_readBoolErr();                                  break;
                                        case self::XLS_Type_MULBLANK:                           $this->_readMulBlank();                                 break;
                                        case self::XLS_Type_LABEL:                                      $this->_readLabel();                                    break;
                                        case self::XLS_Type_BLANK:                                      $this->_readBlank();                                    break;
                                        case self::XLS_Type_MSODRAWING:                         $this->_readMsoDrawing();                               break;
                                        case self::XLS_Type_OBJ:                                        $this->_readObj();                                              break;
                                        case self::XLS_Type_WINDOW2:                            $this->_readWindow2();                                  break;
                                        case self::XLS_Type_PAGELAYOUTVIEW:     $this->_readPageLayoutView();                                   break;
                                        case self::XLS_Type_SCL:                                        $this->_readScl();                                              break;
                                        case self::XLS_Type_PANE:                                       $this->_readPane();                                             break;
                                        case self::XLS_Type_SELECTION:                          $this->_readSelection();                                break;
                                        case self::XLS_Type_MERGEDCELLS:                        $this->_readMergedCells();                              break;
                                        case self::XLS_Type_HYPERLINK:                          $this->_readHyperLink();                                break;
                                        case self::XLS_Type_DATAVALIDATIONS:            $this->_readDataValidations();                  break;
                                        case self::XLS_Type_DATAVALIDATION:                     $this->_readDataValidation();                   break;
                                        case self::XLS_Type_SHEETLAYOUT:                        $this->_readSheetLayout();                              break;
                                        case self::XLS_Type_SHEETPROTECTION:            $this->_readSheetProtection();                  break;
                                        case self::XLS_Type_RANGEPROTECTION:            $this->_readRangeProtection();                  break;
                                        case self::XLS_Type_NOTE:                                       $this->_readNote();                                             break;
                                        //case self::XLS_Type_IMDATA:                           $this->_readImData();                                   break;
                                        case self::XLS_Type_TXO:                                        $this->_readTextObject();                               break;
                                        case self::XLS_Type_CONTINUE:                           $this->_readContinue();                                 break;
                                        case self::XLS_Type_EOF:                                        $this->_readDefault();                                  break 2;
                                        default:                                                                        $this->_readDefault();                                  break;
                                }

                        }

                        // treat MSODRAWING records, sheet-level Escher
                        if (!$this->_readDataOnly && $this->_drawingData) {
                                $escherWorksheet = new PHPExcel_Shared_Escher();
                                $reader = new PHPExcel_Reader_Excel5_Escher($escherWorksheet);
                                $escherWorksheet = $reader->load($this->_drawingData);

                                // debug Escher stream
                                //$debug = new Debug_Escher(new PHPExcel_Shared_Escher());
                                //$debug->load($this->_drawingData);

                                // get all spContainers in one long array, so they can be mapped to OBJ records
                                $allSpContainers = $escherWorksheet->getDgContainer()->getSpgrContainer()->getAllSpContainers();
                        }

                        // treat OBJ records
                        foreach ($this->_objs as $n => $obj) {
//                              echo '<hr /><b>Object</b> reference is ',$n,'<br />';
//                              var_dump($obj);
//                              echo '<br />';

                                // the first shape container never has a corresponding OBJ record, hence $n + 1
                                if (isset($allSpContainers[$n + 1]) && is_object($allSpContainers[$n + 1])) {
                                        $spContainer = $allSpContainers[$n + 1];

                                        // we skip all spContainers that are a part of a group shape since we cannot yet handle those
                                        if ($spContainer->getNestingLevel() > 1) {
                                                continue;
                                        }

                                        // calculate the width and height of the shape
                                        list($startColumn, $startRow) = PHPExcel_Cell::coordinateFromString($spContainer->getStartCoordinates());
                                        list($endColumn, $endRow) = PHPExcel_Cell::coordinateFromString($spContainer->getEndCoordinates());

                                        $startOffsetX = $spContainer->getStartOffsetX();
                                        $startOffsetY = $spContainer->getStartOffsetY();
                                        $endOffsetX = $spContainer->getEndOffsetX();
                                        $endOffsetY = $spContainer->getEndOffsetY();

                                        $width = PHPExcel_Shared_Excel5::getDistanceX($this->_phpSheet, $startColumn, $startOffsetX, $endColumn, $endOffsetX);
                                        $height = PHPExcel_Shared_Excel5::getDistanceY($this->_phpSheet, $startRow, $startOffsetY, $endRow, $endOffsetY);

                                        // calculate offsetX and offsetY of the shape
                                        $offsetX = $startOffsetX * PHPExcel_Shared_Excel5::sizeCol($this->_phpSheet, $startColumn) / 1024;
                                        $offsetY = $startOffsetY * PHPExcel_Shared_Excel5::sizeRow($this->_phpSheet, $startRow) / 256;

                                        switch ($obj['otObjType']) {
                                                case 0x19:
                                                        // Note
//                                                      echo 'Cell Annotation Object<br />';
//                                                      echo 'Object ID is ',$obj['idObjID'],'<br />';
//
                                                        if (isset($this->_cellNotes[$obj['idObjID']])) {
                                                                $cellNote = $this->_cellNotes[$obj['idObjID']];

                                                                if (isset($this->_textObjects[$obj['idObjID']])) {
                                                                        $textObject = $this->_textObjects[$obj['idObjID']];
                                                                        $this->_cellNotes[$obj['idObjID']]['objTextData'] = $textObject;
                                                                }
                                                        }
                                                        break;

                                                case 0x08:
//                                                      echo 'Picture Object<br />';
                                                        // picture

                                                        // get index to BSE entry (1-based)
                                                        $BSEindex = $spContainer->getOPT(0x0104);
                                                        $BSECollection = $escherWorkbook->getDggContainer()->getBstoreContainer()->getBSECollection();
                                                        $BSE = $BSECollection[$BSEindex - 1];
                                                        $blipType = $BSE->getBlipType();

                                                        // need check because some blip types are not supported by Escher reader such as EMF
                                                        if ($blip = $BSE->getBlip()) {
                                                                $ih = imagecreatefromstring($blip->getData());
                                                                $drawing = new PHPExcel_Worksheet_MemoryDrawing();
                                                                $drawing->setImageResource($ih);

                                                                // width, height, offsetX, offsetY
                                                                $drawing->setResizeProportional(false);
                                                                $drawing->setWidth($width);
                                                                $drawing->setHeight($height);
                                                                $drawing->setOffsetX($offsetX);
                                                                $drawing->setOffsetY($offsetY);

                                                                switch ($blipType) {
                                                                        case PHPExcel_Shared_Escher_DggContainer_BstoreContainer_BSE::BLIPTYPE_JPEG:
                                                                                $drawing->setRenderingFunction(PHPExcel_Worksheet_MemoryDrawing::RENDERING_JPEG);
                                                                                $drawing->setMimeType(PHPExcel_Worksheet_MemoryDrawing::MIMETYPE_JPEG);
                                                                                break;

                                                                        case PHPExcel_Shared_Escher_DggContainer_BstoreContainer_BSE::BLIPTYPE_PNG:
                                                                                $drawing->setRenderingFunction(PHPExcel_Worksheet_MemoryDrawing::RENDERING_PNG);
                                                                                $drawing->setMimeType(PHPExcel_Worksheet_MemoryDrawing::MIMETYPE_PNG);
                                                                                break;
                                                                }

                                                                $drawing->setWorksheet($this->_phpSheet);
                                                                $drawing->setCoordinates($spContainer->getStartCoordinates());
                                                        }

                                                        break;

                                                default:
                                                        // other object type
                                                        break;

                                        }
                                }
                        }

                        // treat SHAREDFMLA records
                        if ($this->_version == self::XLS_BIFF8) {
                                foreach ($this->_sharedFormulaParts as $cell => $baseCell) {
                                        list($column, $row) = PHPExcel_Cell::coordinateFromString($cell);
                                        if (($this->getReadFilter() !== NULL) && $this->getReadFilter()->readCell($column, $row, $this->_phpSheet->getTitle()) ) {
                                                $formula = $this->_getFormulaFromStructure($this->_sharedFormulas[$baseCell], $cell);
                                                $this->_phpSheet->getCell($cell)->setValueExplicit('=' . $formula, PHPExcel_Cell_DataType::TYPE_FORMULA);
                                        }
                                }
                        }

                        if (!empty($this->_cellNotes)) {
                                foreach($this->_cellNotes as $note => $noteDetails) {
                                        if (!isset($noteDetails['objTextData'])) {
                                                if (isset($this->_textObjects[$note])) {
                                                        $textObject = $this->_textObjects[$note];
                                                        $noteDetails['objTextData'] = $textObject;
                                                } else {
                                                        $noteDetails['objTextData']['text'] = '';
                                                }
                                        }
//                                      echo '<b>Cell annotation ',$note,'</b><br />';
//                                      var_dump($noteDetails);
//                                      echo '<br />';
                                        $cellAddress = str_replace('$','',$noteDetails['cellRef']);
                                        $this->_phpSheet->getComment( $cellAddress )
                                                                                                        ->setAuthor( $noteDetails['author'] )
                                                                                                        ->setText($this->_parseRichText($noteDetails['objTextData']['text']) );
                                }
                        }
                }

                // add the named ranges (defined names)
                foreach ($this->_definedname as $definedName) {
                        if ($definedName['isBuiltInName']) {
                                switch ($definedName['name']) {

                                case pack('C', 0x06):
                                        // print area
                                        //      in general, formula looks like this: Foo!$C$7:$J$66,Bar!$A$1:$IV$2
                                        $ranges = explode(',', $definedName['formula']); // FIXME: what if sheetname contains comma?

                                        $extractedRanges = array();
                                        foreach ($ranges as $range) {
                                                // $range should look like one of these
                                                //              Foo!$C$7:$J$66
                                                //              Bar!$A$1:$IV$2

                                                $explodes = explode('!', $range);       // FIXME: what if sheetname contains exclamation mark?
                                                $sheetName = trim($explodes[0], "'");

                                                if (count($explodes) == 2) {
                                                        if (strpos($explodes[1], ':') === FALSE) {
                                                                $explodes[1] = $explodes[1] . ':' . $explodes[1];
                                                        }
                                                        $extractedRanges[] = str_replace('$', '', $explodes[1]); // C7:J66
                                                }
                                        }
                                        if ($docSheet = $this->_phpExcel->getSheetByName($sheetName)) {
                                                $docSheet->getPageSetup()->setPrintArea(implode(',', $extractedRanges)); // C7:J66,A1:IV2
                                        }
                                        break;

                                case pack('C', 0x07):
                                        // print titles (repeating rows)
                                        // Assuming BIFF8, there are 3 cases
                                        // 1. repeating rows
                                        //              formula looks like this: Sheet!$A$1:$IV$2
                                        //              rows 1-2 repeat
                                        // 2. repeating columns
                                        //              formula looks like this: Sheet!$A$1:$B$65536
                                        //              columns A-B repeat
                                        // 3. both repeating rows and repeating columns
                                        //              formula looks like this: Sheet!$A$1:$B$65536,Sheet!$A$1:$IV$2

                                        $ranges = explode(',', $definedName['formula']); // FIXME: what if sheetname contains comma?

                                        foreach ($ranges as $range) {
                                                // $range should look like this one of these
                                                //              Sheet!$A$1:$B$65536
                                                //              Sheet!$A$1:$IV$2

                                                $explodes = explode('!', $range);

                                                if (count($explodes) == 2) {
                                                        if ($docSheet = $this->_phpExcel->getSheetByName($explodes[0])) {

                                                                $extractedRange = $explodes[1];
                                                                $extractedRange = str_replace('$', '', $extractedRange);

                                                                $coordinateStrings = explode(':', $extractedRange);
                                                                if (count($coordinateStrings) == 2) {
                                                                        list($firstColumn, $firstRow) = PHPExcel_Cell::coordinateFromString($coordinateStrings[0]);
                                                                        list($lastColumn, $lastRow) = PHPExcel_Cell::coordinateFromString($coordinateStrings[1]);

                                                                        if ($firstColumn == 'A' and $lastColumn == 'IV') {
                                                                                // then we have repeating rows
                                                                                $docSheet->getPageSetup()->setRowsToRepeatAtTop(array($firstRow, $lastRow));
                                                                        } elseif ($firstRow == 1 and $lastRow == 65536) {
                                                                                // then we have repeating columns
                                                                                $docSheet->getPageSetup()->setColumnsToRepeatAtLeft(array($firstColumn, $lastColumn));
                                                                        }
                                                                }
                                                        }
                                                }
                                        }
                                        break;

                                }
                        } else {
                                // Extract range
                                $explodes = explode('!', $definedName['formula']);

                                if (count($explodes) == 2) {
                                        if (($docSheet = $this->_phpExcel->getSheetByName($explodes[0])) ||
                                                ($docSheet = $this->_phpExcel->getSheetByName(trim($explodes[0],"'")))) {
                                                $extractedRange = $explodes[1];
                                                $extractedRange = str_replace('$', '', $extractedRange);

                                                $localOnly = ($definedName['scope'] == 0) ? false : true;

                                                $scope = ($definedName['scope'] == 0) ?
                                                        null : $this->_phpExcel->getSheetByName($this->_sheets[$definedName['scope'] - 1]['name']);

                                                $this->_phpExcel->addNamedRange( new PHPExcel_NamedRange((string)$definedName['name'], $docSheet, $extractedRange, $localOnly, $scope) );
                                        }
                                } else {
                                        //      Named Value
                                        //      TODO Provide support for named values
                                }
                        }
                }
        $this->_data = null;

                return $this->_phpExcel;
        }
        
        private function _readRecordData($data, $pos, $len)
        {
                $data = substr($data, $pos, $len);
                
                // File not encrypted, or record before encryption start point
                if ($this->_encryption == self::MS_BIFF_CRYPTO_NONE || $pos < $this->_encryptionStartPos) {
                        return $data;
                }
        
                $recordData = '';
                if ($this->_encryption == self::MS_BIFF_CRYPTO_RC4) {

                        $oldBlock = floor($this->_rc4Pos / self::REKEY_BLOCK);
                        $block = floor($pos / self::REKEY_BLOCK);
                        $endBlock = floor(($pos + $len) / self::REKEY_BLOCK);

                        // Spin an RC4 decryptor to the right spot. If we have a decryptor sitting
                        // at a point earlier in the current block, re-use it as we can save some time.
                        if ($block != $oldBlock || $pos < $this->_rc4Pos || !$this->_rc4Key) {
                                $this->_rc4Key = $this->_makeKey($block, $this->_md5Ctxt);
                                $step = $pos % self::REKEY_BLOCK;
                        } else {
                                $step = $pos - $this->_rc4Pos;
                        }
                        $this->_rc4Key->RC4(str_repeat("\0", $step));

                        // Decrypt record data (re-keying at the end of every block)
                        while ($block != $endBlock) {
                                $step = self::REKEY_BLOCK - ($pos % self::REKEY_BLOCK);
                                $recordData .= $this->_rc4Key->RC4(substr($data, 0, $step));
                                $data = substr($data, $step);
                                $pos += $step;
                                $len -= $step;
                                $block++;
                                $this->_rc4Key = $this->_makeKey($block, $this->_md5Ctxt);
                        }
                        $recordData .= $this->_rc4Key->RC4(substr($data, 0, $len));

                        // Keep track of the position of this decryptor.
                        // We'll try and re-use it later if we can to speed things up
                        $this->_rc4Pos = $pos + $len;
                        
                } elseif ($this->_encryption == self::MS_BIFF_CRYPTO_XOR) {
                        throw new PHPExcel_Reader_Exception('XOr encryption not supported');
                }
                return $recordData;
        }

        private function _loadOLE($pFilename)
        {
                // OLE reader
                $ole = new PHPExcel_Shared_OLERead();

                // get excel data,
                $res = $ole->read($pFilename);
                // Get workbook data: workbook stream + sheet streams
                $this->_data = $ole->getStream($ole->wrkbook);

                // Get summary information data
                $this->_summaryInformation = $ole->getStream($ole->summaryInformation);

                // Get additional document summary information data
                $this->_documentSummaryInformation = $ole->getStream($ole->documentSummaryInformation);

                // Get user-defined property data
//              $this->_userDefinedProperties = $ole->getUserDefinedProperties();
        }


        private function _readSummaryInformation()
        {
                if (!isset($this->_summaryInformation)) {
                        return;
                }

                // offset: 0; size: 2; must be 0xFE 0xFF (UTF-16 LE byte order mark)
                // offset: 2; size: 2;
                // offset: 4; size: 2; OS version
                // offset: 6; size: 2; OS indicator
                // offset: 8; size: 16
                // offset: 24; size: 4; section count
                $secCount = self::_GetInt4d($this->_summaryInformation, 24);

                // offset: 28; size: 16; first section's class id: e0 85 9f f2 f9 4f 68 10 ab 91 08 00 2b 27 b3 d9
                // offset: 44; size: 4
                $secOffset = self::_GetInt4d($this->_summaryInformation, 44);

                // section header
                // offset: $secOffset; size: 4; section length
                $secLength = self::_GetInt4d($this->_summaryInformation, $secOffset);

                // offset: $secOffset+4; size: 4; property count
                $countProperties = self::_GetInt4d($this->_summaryInformation, $secOffset+4);

                // initialize code page (used to resolve string values)
                $codePage = 'CP1252';

                // offset: ($secOffset+8); size: var
                // loop through property decarations and properties
                for ($i = 0; $i < $countProperties; ++$i) {

                        // offset: ($secOffset+8) + (8 * $i); size: 4; property ID
                        $id = self::_GetInt4d($this->_summaryInformation, ($secOffset+8) + (8 * $i));

                        // Use value of property id as appropriate
                        // offset: ($secOffset+12) + (8 * $i); size: 4; offset from beginning of section (48)
                        $offset = self::_GetInt4d($this->_summaryInformation, ($secOffset+12) + (8 * $i));

                        $type = self::_GetInt4d($this->_summaryInformation, $secOffset + $offset);

                        // initialize property value
                        $value = null;

                        // extract property value based on property type
                        switch ($type) {
                                case 0x02: // 2 byte signed integer
                                        $value = self::_GetInt2d($this->_summaryInformation, $secOffset + 4 + $offset);
                                        break;

                                case 0x03: // 4 byte signed integer
                                        $value = self::_GetInt4d($this->_summaryInformation, $secOffset + 4 + $offset);
                                        break;

                                case 0x13: // 4 byte unsigned integer
                                        // not needed yet, fix later if necessary
                                        break;

                                case 0x1E: // null-terminated string prepended by dword string length
                                        $byteLength = self::_GetInt4d($this->_summaryInformation, $secOffset + 4 + $offset);
                                        $value = substr($this->_summaryInformation, $secOffset + 8 + $offset, $byteLength);
                                        $value = PHPExcel_Shared_String::ConvertEncoding($value, 'UTF-8', $codePage);
                                        $value = rtrim($value);
                                        break;

                                case 0x40: // Filetime (64-bit value representing the number of 100-nanosecond intervals since January 1, 1601)
                                        // PHP-time
                                        $value = PHPExcel_Shared_OLE::OLE2LocalDate(substr($this->_summaryInformation, $secOffset + 4 + $offset, 8));
                                        break;

                                case 0x47: // Clipboard format
                                        // not needed yet, fix later if necessary
                                        break;
                        }

                        switch ($id) {
                                case 0x01:      //      Code Page
                                        $codePage = PHPExcel_Shared_CodePage::NumberToName($value);
                                        break;

                                case 0x02:      //      Title
                                        $this->_phpExcel->getProperties()->setTitle($value);
                                        break;

                                case 0x03:      //      Subject
                                        $this->_phpExcel->getProperties()->setSubject($value);
                                        break;

                                case 0x04:      //      Author (Creator)
                                        $this->_phpExcel->getProperties()->setCreator($value);
                                        break;

                                case 0x05:      //      Keywords
                                        $this->_phpExcel->getProperties()->setKeywords($value);
                                        break;

                                case 0x06:      //      Comments (Description)
                                        $this->_phpExcel->getProperties()->setDescription($value);
                                        break;

                                case 0x07:      //      Template
                                        //      Not supported by PHPExcel
                                        break;

                                case 0x08:      //      Last Saved By (LastModifiedBy)
                                        $this->_phpExcel->getProperties()->setLastModifiedBy($value);
                                        break;

                                case 0x09:      //      Revision
                                        //      Not supported by PHPExcel
                                        break;

                                case 0x0A:      //      Total Editing Time
                                        //      Not supported by PHPExcel
                                        break;

                                case 0x0B:      //      Last Printed
                                        //      Not supported by PHPExcel
                                        break;

                                case 0x0C:      //      Created Date/Time
                                        $this->_phpExcel->getProperties()->setCreated($value);
                                        break;

                                case 0x0D:      //      Modified Date/Time
                                        $this->_phpExcel->getProperties()->setModified($value);
                                        break;

                                case 0x0E:      //      Number of Pages
                                        //      Not supported by PHPExcel
                                        break;

                                case 0x0F:      //      Number of Words
                                        //      Not supported by PHPExcel
                                        break;

                                case 0x10:      //      Number of Characters
                                        //      Not supported by PHPExcel
                                        break;

                                case 0x11:      //      Thumbnail
                                        //      Not supported by PHPExcel
                                        break;

                                case 0x12:      //      Name of creating application
                                        //      Not supported by PHPExcel
                                        break;

                                case 0x13:      //      Security
                                        //      Not supported by PHPExcel
                                        break;

                        }
                }
        }


        private function _readDocumentSummaryInformation()
        {
                if (!isset($this->_documentSummaryInformation)) {
                        return;
                }

                //      offset: 0;      size: 2;        must be 0xFE 0xFF (UTF-16 LE byte order mark)
                //      offset: 2;      size: 2;
                //      offset: 4;      size: 2;        OS version
                //      offset: 6;      size: 2;        OS indicator
                //      offset: 8;      size: 16
                //      offset: 24;     size: 4;        section count
                $secCount = self::_GetInt4d($this->_documentSummaryInformation, 24);
//              echo '$secCount = ',$secCount,'<br />';

                // offset: 28;  size: 16;       first section's class id: 02 d5 cd d5 9c 2e 1b 10 93 97 08 00 2b 2c f9 ae
                // offset: 44;  size: 4;        first section offset
                $secOffset = self::_GetInt4d($this->_documentSummaryInformation, 44);
//              echo '$secOffset = ',$secOffset,'<br />';

                //      section header
                //      offset: $secOffset;     size: 4;        section length
                $secLength = self::_GetInt4d($this->_documentSummaryInformation, $secOffset);
//              echo '$secLength = ',$secLength,'<br />';

                //      offset: $secOffset+4;   size: 4;        property count
                $countProperties = self::_GetInt4d($this->_documentSummaryInformation, $secOffset+4);
//              echo '$countProperties = ',$countProperties,'<br />';

                // initialize code page (used to resolve string values)
                $codePage = 'CP1252';

                //      offset: ($secOffset+8); size: var
                //      loop through property decarations and properties
                for ($i = 0; $i < $countProperties; ++$i) {
//                      echo 'Property ',$i,'<br />';
                        //      offset: ($secOffset+8) + (8 * $i);      size: 4;        property ID
                        $id = self::_GetInt4d($this->_documentSummaryInformation, ($secOffset+8) + (8 * $i));
//                      echo 'ID is ',$id,'<br />';

                        // Use value of property id as appropriate
                        // offset: 60 + 8 * $i; size: 4;        offset from beginning of section (48)
                        $offset = self::_GetInt4d($this->_documentSummaryInformation, ($secOffset+12) + (8 * $i));

                        $type = self::_GetInt4d($this->_documentSummaryInformation, $secOffset + $offset);
//                      echo 'Type is ',$type,', ';

                        // initialize property value
                        $value = null;

                        // extract property value based on property type
                        switch ($type) {
                                case 0x02:      //      2 byte signed integer
                                        $value = self::_GetInt2d($this->_documentSummaryInformation, $secOffset + 4 + $offset);
                                        break;

                                case 0x03:      //      4 byte signed integer
                                        $value = self::_GetInt4d($this->_documentSummaryInformation, $secOffset + 4 + $offset);
                                        break;

                                case 0x0B:  // Boolean
                                        $value = self::_GetInt2d($this->_documentSummaryInformation, $secOffset + 4 + $offset);
                                        $value = ($value == 0 ? false : true);
                                        break;

                                case 0x13:      //      4 byte unsigned integer
                                        // not needed yet, fix later if necessary
                                        break;

                                case 0x1E:      //      null-terminated string prepended by dword string length
                                        $byteLength = self::_GetInt4d($this->_documentSummaryInformation, $secOffset + 4 + $offset);
                                        $value = substr($this->_documentSummaryInformation, $secOffset + 8 + $offset, $byteLength);
                                        $value = PHPExcel_Shared_String::ConvertEncoding($value, 'UTF-8', $codePage);
                                        $value = rtrim($value);
                                        break;

                                case 0x40:      //      Filetime (64-bit value representing the number of 100-nanosecond intervals since January 1, 1601)
                                        // PHP-Time
                                        $value = PHPExcel_Shared_OLE::OLE2LocalDate(substr($this->_documentSummaryInformation, $secOffset + 4 + $offset, 8));
                                        break;

                                case 0x47:      //      Clipboard format
                                        // not needed yet, fix later if necessary
                                        break;
                        }

                        switch ($id) {
                                case 0x01:      //      Code Page
                                        $codePage = PHPExcel_Shared_CodePage::NumberToName($value);
                                        break;

                                case 0x02:      //      Category
                                        $this->_phpExcel->getProperties()->setCategory($value);
                                        break;

                                case 0x03:      //      Presentation Target
                                        //      Not supported by PHPExcel
                                        break;

                                case 0x04:      //      Bytes
                                        //      Not supported by PHPExcel
                                        break;

                                case 0x05:      //      Lines
                                        //      Not supported by PHPExcel
                                        break;

                                case 0x06:      //      Paragraphs
                                        //      Not supported by PHPExcel
                                        break;

                                case 0x07:      //      Slides
                                        //      Not supported by PHPExcel
                                        break;

                                case 0x08:      //      Notes
                                        //      Not supported by PHPExcel
                                        break;

                                case 0x09:      //      Hidden Slides
                                        //      Not supported by PHPExcel
                                        break;

                                case 0x0A:      //      MM Clips
                                        //      Not supported by PHPExcel
                                        break;

                                case 0x0B:      //      Scale Crop
                                        //      Not supported by PHPExcel
                                        break;

                                case 0x0C:      //      Heading Pairs
                                        //      Not supported by PHPExcel
                                        break;

                                case 0x0D:      //      Titles of Parts
                                        //      Not supported by PHPExcel
                                        break;

                                case 0x0E:      //      Manager
                                        $this->_phpExcel->getProperties()->setManager($value);
                                        break;

                                case 0x0F:      //      Company
                                        $this->_phpExcel->getProperties()->setCompany($value);
                                        break;

                                case 0x10:      //      Links up-to-date
                                        //      Not supported by PHPExcel
                                        break;

                        }
                }
        }


        private function _readDefault()
        {
                $length = self::_GetInt2d($this->_data, $this->_pos + 2);
//              $recordData = $this->_readRecordData($this->_data, $this->_pos + 4, $length);

                // move stream pointer to next record
                $this->_pos += 4 + $length;
        }


        private function _readNote()
        {
//              echo '<b>Read Cell Annotation</b><br />';
                $length = self::_GetInt2d($this->_data, $this->_pos + 2);
                $recordData = $this->_readRecordData($this->_data, $this->_pos + 4, $length);

                // move stream pointer to next record
                $this->_pos += 4 + $length;

                if ($this->_readDataOnly) {
                        return;
                }

                $cellAddress = $this->_readBIFF8CellAddress(substr($recordData, 0, 4));
                if ($this->_version == self::XLS_BIFF8) {
                        $noteObjID = self::_GetInt2d($recordData, 6);
                        $noteAuthor = self::_readUnicodeStringLong(substr($recordData, 8));
                        $noteAuthor = $noteAuthor['value'];
//                      echo 'Note Address=',$cellAddress,'<br />';
//                      echo 'Note Object ID=',$noteObjID,'<br />';
//                      echo 'Note Author=',$noteAuthor,'<hr />';
//
                        $this->_cellNotes[$noteObjID] = array('cellRef'         => $cellAddress,
                                                                                                  'objectID'    => $noteObjID,
                                                                                                  'author'              => $noteAuthor
                                                                                                 );
                } else {
                        $extension = false;
                        if ($cellAddress == '$B$65536') {
                                //      If the address row is -1 and the column is 0, (which translates as $B$65536) then this is a continuation
                                //              note from the previous cell annotation. We're not yet handling this, so annotations longer than the
                                //              max 2048 bytes will probably throw a wobbly.
                                $row = self::_GetInt2d($recordData, 0);
                                $extension = true;
                                $cellAddress = array_pop(array_keys($this->_phpSheet->getComments()));
                        }
//                      echo 'Note Address=',$cellAddress,'<br />';

                        $cellAddress = str_replace('$','',$cellAddress);
                        $noteLength = self::_GetInt2d($recordData, 4);
                        $noteText = trim(substr($recordData, 6));
//                      echo 'Note Length=',$noteLength,'<br />';
//                      echo 'Note Text=',$noteText,'<br />';

                        if ($extension) {
                                //      Concatenate this extension with the currently set comment for the cell
                                $comment = $this->_phpSheet->getComment( $cellAddress );
                                $commentText = $comment->getText()->getPlainText();
                                $comment->setText($this->_parseRichText($commentText.$noteText) );
                        } else {
                                //      Set comment for the cell
                                $this->_phpSheet->getComment( $cellAddress )
//                                                                                                      ->setAuthor( $author )
                                                                                                        ->setText($this->_parseRichText($noteText) );
                        }
                }

        }


        private function _readTextObject()
        {
                $length = self::_GetInt2d($this->_data, $this->_pos + 2);
                $recordData = $this->_readRecordData($this->_data, $this->_pos + 4, $length);

                // move stream pointer to next record
                $this->_pos += 4 + $length;

                if ($this->_readDataOnly) {
                        return;
                }

                // recordData consists of an array of subrecords looking like this:
                //      grbit: 2 bytes; Option Flags
                //      rot: 2 bytes; rotation
                //      cchText: 2 bytes; length of the text (in the first continue record)
                //      cbRuns: 2 bytes; length of the formatting (in the second continue record)
                // followed by the continuation records containing the actual text and formatting
                $grbitOpts      = self::_GetInt2d($recordData, 0);
                $rot            = self::_GetInt2d($recordData, 2);
                $cchText        = self::_GetInt2d($recordData, 10);
                $cbRuns         = self::_GetInt2d($recordData, 12);
                $text           = $this->_getSplicedRecordData();

                $this->_textObjects[$this->textObjRef] = array(
                                'text'          => substr($text["recordData"],$text["spliceOffsets"][0]+1,$cchText),
                                'format'        => substr($text["recordData"],$text["spliceOffsets"][1],$cbRuns),
                                'alignment'     => $grbitOpts,
                                'rotation'      => $rot
                         );

//              echo '<b>_readTextObject()</b><br />';
//              var_dump($this->_textObjects[$this->textObjRef]);
//              echo '<br />';
        }


        private function _readBof()
        {
                $length = self::_GetInt2d($this->_data, $this->_pos + 2);
                $recordData = substr($this->_data, $this->_pos + 4, $length);

                // move stream pointer to next record
                $this->_pos += 4 + $length;

                // offset: 2; size: 2; type of the following data
                $substreamType = self::_GetInt2d($recordData, 2);

                switch ($substreamType) {
                        case self::XLS_WorkbookGlobals:
                                $version = self::_GetInt2d($recordData, 0);
                                if (($version != self::XLS_BIFF8) && ($version != self::XLS_BIFF7)) {
                                        throw new PHPExcel_Reader_Exception('Cannot read this Excel file. Version is too old.');
                                }
                                $this->_version = $version;
                                break;

                        case self::XLS_Worksheet:
                                // do not use this version information for anything
                                // it is unreliable (OpenOffice doc, 5.8), use only version information from the global stream
                                break;

                        default:
                                // substream, e.g. chart
                                // just skip the entire substream
                                do {
                                        $code = self::_GetInt2d($this->_data, $this->_pos);
                                        $this->_readDefault();
                                } while ($code != self::XLS_Type_EOF && $this->_pos < $this->_dataSize);
                                break;
                }
        }


        private function _readFilepass()
        {
                $length = self::_GetInt2d($this->_data, $this->_pos + 2);

                if ($length != 54) {
                        throw new PHPExcel_Reader_Exception('Unexpected file pass record length');
                }
                
                $recordData = $this->_readRecordData($this->_data, $this->_pos + 4, $length);
                
                // move stream pointer to next record
                $this->_pos += 4 + $length;
                
                if (!$this->_verifyPassword(
                        'VelvetSweatshop',
                        substr($recordData, 6,  16),
                        substr($recordData, 22, 16),
                        substr($recordData, 38, 16),
                        $this->_md5Ctxt
                )) {
                        throw new PHPExcel_Reader_Exception('Decryption password incorrect');
                }
                
                $this->_encryption = self::MS_BIFF_CRYPTO_RC4;

                // Decryption required from the record after next onwards
                $this->_encryptionStartPos = $this->_pos + self::_GetInt2d($this->_data, $this->_pos + 2);
        }

        private function _makeKey($block, $valContext)
        {
                $pwarray = str_repeat("\0", 64);

                for ($i = 0; $i < 5; $i++) {
                        $pwarray[$i] = $valContext[$i];
                }
                
                $pwarray[5] = chr($block & 0xff);
                $pwarray[6] = chr(($block >> 8) & 0xff);
                $pwarray[7] = chr(($block >> 16) & 0xff);
                $pwarray[8] = chr(($block >> 24) & 0xff);

                $pwarray[9] = "\x80";
                $pwarray[56] = "\x48";

                $md5 = new PHPExcel_Reader_Excel5_MD5();
                $md5->add($pwarray);

                $s = $md5->getContext();
                return new PHPExcel_Reader_Excel5_RC4($s);
        }

        private function _verifyPassword($password, $docid, $salt_data, $hashedsalt_data, &$valContext)
        {
                $pwarray = str_repeat("\0", 64);

                for ($i = 0; $i < strlen($password); $i++) {
                        $o = ord(substr($password, $i, 1));
                        $pwarray[2 * $i] = chr($o & 0xff);
                        $pwarray[2 * $i + 1] = chr(($o >> 8) & 0xff);
                }
                $pwarray[2 * $i] = chr(0x80);
                $pwarray[56] = chr(($i << 4) & 0xff);

                $md5 = new PHPExcel_Reader_Excel5_MD5();
                $md5->add($pwarray);

                $mdContext1 = $md5->getContext();

                $offset = 0;
                $keyoffset = 0;
                $tocopy = 5;

                $md5->reset();

                while ($offset != 16) {
                        if ((64 - $offset) < 5) {
                                $tocopy = 64 - $offset;
                        }
                        
                        for ($i = 0; $i <= $tocopy; $i++) {
                                $pwarray[$offset + $i] = $mdContext1[$keyoffset + $i];
                        }

                        $offset += $tocopy;

                        if ($offset == 64) {
                                $md5->add($pwarray);
                                $keyoffset = $tocopy;
                                $tocopy = 5 - $tocopy;
                                $offset = 0;
                                continue;
                        }

                        $keyoffset = 0;
                        $tocopy = 5;
                        for ($i = 0; $i < 16; $i++) {
                                $pwarray[$offset + $i] = $docid[$i];
                        }
                        $offset += 16;
                }

                $pwarray[16] = "\x80";
                for ($i = 0; $i < 47; $i++) {
                        $pwarray[17 + $i] = "\0";
                }
                $pwarray[56] = "\x80";
                $pwarray[57] = "\x0a";

                $md5->add($pwarray);
                $valContext = $md5->getContext();

                $key = $this->_makeKey(0, $valContext);

                $salt = $key->RC4($salt_data);
                $hashedsalt = $key->RC4($hashedsalt_data);
                
                $salt .= "\x80" . str_repeat("\0", 47);
                $salt[56] = "\x80";

                $md5->reset();
                $md5->add($salt);
                $mdContext2 = $md5->getContext();

                return $mdContext2 == $hashedsalt;
        }

        private function _readCodepage()
        {
                $length = self::_GetInt2d($this->_data, $this->_pos + 2);
                $recordData = $this->_readRecordData($this->_data, $this->_pos + 4, $length);

                // move stream pointer to next record
                $this->_pos += 4 + $length;

                // offset: 0; size: 2; code page identifier
                $codepage = self::_GetInt2d($recordData, 0);

                $this->_codepage = PHPExcel_Shared_CodePage::NumberToName($codepage);
        }


        private function _readDateMode()
        {
                $length = self::_GetInt2d($this->_data, $this->_pos + 2);
                $recordData = $this->_readRecordData($this->_data, $this->_pos + 4, $length);

                // move stream pointer to next record
                $this->_pos += 4 + $length;

                // offset: 0; size: 2; 0 = base 1900, 1 = base 1904
                PHPExcel_Shared_Date::setExcelCalendar(PHPExcel_Shared_Date::CALENDAR_WINDOWS_1900);
                if (ord($recordData{0}) == 1) {
                        PHPExcel_Shared_Date::setExcelCalendar(PHPExcel_Shared_Date::CALENDAR_MAC_1904);
                }
        }


        private function _readFont()
        {
                $length = self::_GetInt2d($this->_data, $this->_pos + 2);
                $recordData = $this->_readRecordData($this->_data, $this->_pos + 4, $length);

                // move stream pointer to next record
                $this->_pos += 4 + $length;

                if (!$this->_readDataOnly) {
                        $objFont = new PHPExcel_Style_Font();

                        // offset: 0; size: 2; height of the font (in twips = 1/20 of a point)
                        $size = self::_GetInt2d($recordData, 0);
                        $objFont->setSize($size / 20);

                        // offset: 2; size: 2; option flags
                                // bit: 0; mask 0x0001; bold (redundant in BIFF5-BIFF8)
                                // bit: 1; mask 0x0002; italic
                                $isItalic = (0x0002 & self::_GetInt2d($recordData, 2)) >> 1;
                                if ($isItalic) $objFont->setItalic(true);

                                // bit: 2; mask 0x0004; underlined (redundant in BIFF5-BIFF8)
                                // bit: 3; mask 0x0008; strike
                                $isStrike = (0x0008 & self::_GetInt2d($recordData, 2)) >> 3;
                                if ($isStrike) $objFont->setStrikethrough(true);

                        // offset: 4; size: 2; colour index
                        $colorIndex = self::_GetInt2d($recordData, 4);
                        $objFont->colorIndex = $colorIndex;

                        // offset: 6; size: 2; font weight
                        $weight = self::_GetInt2d($recordData, 6);
                        switch ($weight) {
                                case 0x02BC:
                                        $objFont->setBold(true);
                                        break;
                        }

                        // offset: 8; size: 2; escapement type
                        $escapement = self::_GetInt2d($recordData, 8);
                        switch ($escapement) {
                                case 0x0001:
                                        $objFont->setSuperScript(true);
                                        break;
                                case 0x0002:
                                        $objFont->setSubScript(true);
                                        break;
                        }

                        // offset: 10; size: 1; underline type
                        $underlineType = ord($recordData{10});
                        switch ($underlineType) {
                                case 0x00:
                                        break; // no underline
                                case 0x01:
                                        $objFont->setUnderline(PHPExcel_Style_Font::UNDERLINE_SINGLE);
                                        break;
                                case 0x02:
                                        $objFont->setUnderline(PHPExcel_Style_Font::UNDERLINE_DOUBLE);
                                        break;
                                case 0x21:
                                        $objFont->setUnderline(PHPExcel_Style_Font::UNDERLINE_SINGLEACCOUNTING);
                                        break;
                                case 0x22:
                                        $objFont->setUnderline(PHPExcel_Style_Font::UNDERLINE_DOUBLEACCOUNTING);
                                        break;
                        }

                        // offset: 11; size: 1; font family
                        // offset: 12; size: 1; character set
                        // offset: 13; size: 1; not used
                        // offset: 14; size: var; font name
                        if ($this->_version == self::XLS_BIFF8) {
                                $string = self::_readUnicodeStringShort(substr($recordData, 14));
                        } else {
                                $string = $this->_readByteStringShort(substr($recordData, 14));
                        }
                        $objFont->setName($string['value']);

                        $this->_objFonts[] = $objFont;
                }
        }


        private function _readFormat()
        {
                $length = self::_GetInt2d($this->_data, $this->_pos + 2);
                $recordData = $this->_readRecordData($this->_data, $this->_pos + 4, $length);

                // move stream pointer to next record
                $this->_pos += 4 + $length;

                if (!$this->_readDataOnly) {
                        $indexCode = self::_GetInt2d($recordData, 0);

                        if ($this->_version == self::XLS_BIFF8) {
                                $string = self::_readUnicodeStringLong(substr($recordData, 2));
                        } else {
                                // BIFF7
                                $string = $this->_readByteStringShort(substr($recordData, 2));
                        }

                        $formatString = $string['value'];
                        $this->_formats[$indexCode] = $formatString;
                }
        }


        private function _readXf()
        {
                $length = self::_GetInt2d($this->_data, $this->_pos + 2);
                $recordData = $this->_readRecordData($this->_data, $this->_pos + 4, $length);

                // move stream pointer to next record
                $this->_pos += 4 + $length;

                $objStyle = new PHPExcel_Style();

                if (!$this->_readDataOnly) {
                        // offset:  0; size: 2; Index to FONT record
                        if (self::_GetInt2d($recordData, 0) < 4) {
                                $fontIndex = self::_GetInt2d($recordData, 0);
                        } else {
                                // this has to do with that index 4 is omitted in all BIFF versions for some strange reason
                                // check the OpenOffice documentation of the FONT record
                                $fontIndex = self::_GetInt2d($recordData, 0) - 1;
                        }
                        $objStyle->setFont($this->_objFonts[$fontIndex]);

                        // offset:  2; size: 2; Index to FORMAT record
                        $numberFormatIndex = self::_GetInt2d($recordData, 2);
                        if (isset($this->_formats[$numberFormatIndex])) {
                                // then we have user-defined format code
                                $numberformat = array('code' => $this->_formats[$numberFormatIndex]);
                        } elseif (($code = PHPExcel_Style_NumberFormat::builtInFormatCode($numberFormatIndex)) !== '') {
                                // then we have built-in format code
                                $numberformat = array('code' => $code);
                        } else {
                                // we set the general format code
                                $numberformat = array('code' => 'General');
                        }
                        $objStyle->getNumberFormat()->setFormatCode($numberformat['code']);

                        // offset:  4; size: 2; XF type, cell protection, and parent style XF
                        // bit 2-0; mask 0x0007; XF_TYPE_PROT
                        $xfTypeProt = self::_GetInt2d($recordData, 4);
                        // bit 0; mask 0x01; 1 = cell is locked
                        $isLocked = (0x01 & $xfTypeProt) >> 0;
                        $objStyle->getProtection()->setLocked($isLocked ?
                                PHPExcel_Style_Protection::PROTECTION_INHERIT : PHPExcel_Style_Protection::PROTECTION_UNPROTECTED);

                        // bit 1; mask 0x02; 1 = Formula is hidden
                        $isHidden = (0x02 & $xfTypeProt) >> 1;
                        $objStyle->getProtection()->setHidden($isHidden ?
                                PHPExcel_Style_Protection::PROTECTION_PROTECTED : PHPExcel_Style_Protection::PROTECTION_UNPROTECTED);

                        // bit 2; mask 0x04; 0 = Cell XF, 1 = Cell Style XF
                        $isCellStyleXf = (0x04 & $xfTypeProt) >> 2;

                        // offset:  6; size: 1; Alignment and text break
                        // bit 2-0, mask 0x07; horizontal alignment
                        $horAlign = (0x07 & ord($recordData{6})) >> 0;
                        switch ($horAlign) {
                                case 0:
                                        $objStyle->getAlignment()->setHorizontal(PHPExcel_Style_Alignment::HORIZONTAL_GENERAL);
                                        break;
                                case 1:
                                        $objStyle->getAlignment()->setHorizontal(PHPExcel_Style_Alignment::HORIZONTAL_LEFT);
                                        break;
                                case 2:
                                        $objStyle->getAlignment()->setHorizontal(PHPExcel_Style_Alignment::HORIZONTAL_CENTER);
                                        break;
                                case 3:
                                        $objStyle->getAlignment()->setHorizontal(PHPExcel_Style_Alignment::HORIZONTAL_RIGHT);
                                        break;
                                case 4:
                                        $objStyle->getAlignment()->setHorizontal(PHPExcel_Style_Alignment::HORIZONTAL_FILL);
                                        break;
                                case 5:
                                        $objStyle->getAlignment()->setHorizontal(PHPExcel_Style_Alignment::HORIZONTAL_JUSTIFY);
                                        break;
                                case 6:
                                        $objStyle->getAlignment()->setHorizontal(PHPExcel_Style_Alignment::HORIZONTAL_CENTER_CONTINUOUS);
                                        break;
                        }
                        // bit 3, mask 0x08; wrap text
                        $wrapText = (0x08 & ord($recordData{6})) >> 3;
                        switch ($wrapText) {
                                case 0:
                                        $objStyle->getAlignment()->setWrapText(false);
                                        break;
                                case 1:
                                        $objStyle->getAlignment()->setWrapText(true);
                                        break;
                        }
                        // bit 6-4, mask 0x70; vertical alignment
                        $vertAlign = (0x70 & ord($recordData{6})) >> 4;
                        switch ($vertAlign) {
                                case 0:
                                        $objStyle->getAlignment()->setVertical(PHPExcel_Style_Alignment::VERTICAL_TOP);
                                        break;
                                case 1:
                                        $objStyle->getAlignment()->setVertical(PHPExcel_Style_Alignment::VERTICAL_CENTER);
                                        break;
                                case 2:
                                        $objStyle->getAlignment()->setVertical(PHPExcel_Style_Alignment::VERTICAL_BOTTOM);
                                        break;
                                case 3:
                                        $objStyle->getAlignment()->setVertical(PHPExcel_Style_Alignment::VERTICAL_JUSTIFY);
                                        break;
                        }

                        if ($this->_version == self::XLS_BIFF8) {
                                // offset:  7; size: 1; XF_ROTATION: Text rotation angle
                                        $angle = ord($recordData{7});
                                        $rotation = 0;
                                        if ($angle <= 90) {
                                                $rotation = $angle;
                                        } else if ($angle <= 180) {
                                                $rotation = 90 - $angle;
                                        } else if ($angle == 255) {
                                                $rotation = -165;
                                        }
                                        $objStyle->getAlignment()->setTextRotation($rotation);

                                // offset:  8; size: 1; Indentation, shrink to cell size, and text direction
                                        // bit: 3-0; mask: 0x0F; indent level
                                        $indent = (0x0F & ord($recordData{8})) >> 0;
                                        $objStyle->getAlignment()->setIndent($indent);

                                        // bit: 4; mask: 0x10; 1 = shrink content to fit into cell
                                        $shrinkToFit = (0x10 & ord($recordData{8})) >> 4;
                                        switch ($shrinkToFit) {
                                                case 0:
                                                        $objStyle->getAlignment()->setShrinkToFit(false);
                                                        break;
                                                case 1:
                                                        $objStyle->getAlignment()->setShrinkToFit(true);
                                                        break;
                                        }

                                // offset:  9; size: 1; Flags used for attribute groups

                                // offset: 10; size: 4; Cell border lines and background area
                                        // bit: 3-0; mask: 0x0000000F; left style
                                        if ($bordersLeftStyle = self::_mapBorderStyle((0x0000000F & self::_GetInt4d($recordData, 10)) >> 0)) {
                                                $objStyle->getBorders()->getLeft()->setBorderStyle($bordersLeftStyle);
                                        }
                                        // bit: 7-4; mask: 0x000000F0; right style
                                        if ($bordersRightStyle = self::_mapBorderStyle((0x000000F0 & self::_GetInt4d($recordData, 10)) >> 4)) {
                                                $objStyle->getBorders()->getRight()->setBorderStyle($bordersRightStyle);
                                        }
                                        // bit: 11-8; mask: 0x00000F00; top style
                                        if ($bordersTopStyle = self::_mapBorderStyle((0x00000F00 & self::_GetInt4d($recordData, 10)) >> 8)) {
                                                $objStyle->getBorders()->getTop()->setBorderStyle($bordersTopStyle);
                                        }
                                        // bit: 15-12; mask: 0x0000F000; bottom style
                                        if ($bordersBottomStyle = self::_mapBorderStyle((0x0000F000 & self::_GetInt4d($recordData, 10)) >> 12)) {
                                                $objStyle->getBorders()->getBottom()->setBorderStyle($bordersBottomStyle);
                                        }
                                        // bit: 22-16; mask: 0x007F0000; left color
                                        $objStyle->getBorders()->getLeft()->colorIndex = (0x007F0000 & self::_GetInt4d($recordData, 10)) >> 16;

                                        // bit: 29-23; mask: 0x3F800000; right color
                                        $objStyle->getBorders()->getRight()->colorIndex = (0x3F800000 & self::_GetInt4d($recordData, 10)) >> 23;

                                        // bit: 30; mask: 0x40000000; 1 = diagonal line from top left to right bottom
                                        $diagonalDown = (0x40000000 & self::_GetInt4d($recordData, 10)) >> 30 ?
                                                true : false;

                                        // bit: 31; mask: 0x80000000; 1 = diagonal line from bottom left to top right
                                        $diagonalUp = (0x80000000 & self::_GetInt4d($recordData, 10)) >> 31 ?
                                                true : false;

                                        if ($diagonalUp == false && $diagonalDown == false) {
                                                $objStyle->getBorders()->setDiagonalDirection(PHPExcel_Style_Borders::DIAGONAL_NONE);
                                        } elseif ($diagonalUp == true && $diagonalDown == false) {
                                                $objStyle->getBorders()->setDiagonalDirection(PHPExcel_Style_Borders::DIAGONAL_UP);
                                        } elseif ($diagonalUp == false && $diagonalDown == true) {
                                                $objStyle->getBorders()->setDiagonalDirection(PHPExcel_Style_Borders::DIAGONAL_DOWN);
                                        } elseif ($diagonalUp == true && $diagonalDown == true) {
                                                $objStyle->getBorders()->setDiagonalDirection(PHPExcel_Style_Borders::DIAGONAL_BOTH);
                                        }

                                // offset: 14; size: 4;
                                        // bit: 6-0; mask: 0x0000007F; top color
                                        $objStyle->getBorders()->getTop()->colorIndex = (0x0000007F & self::_GetInt4d($recordData, 14)) >> 0;

                                        // bit: 13-7; mask: 0x00003F80; bottom color
                                        $objStyle->getBorders()->getBottom()->colorIndex = (0x00003F80 & self::_GetInt4d($recordData, 14)) >> 7;

                                        // bit: 20-14; mask: 0x001FC000; diagonal color
                                        $objStyle->getBorders()->getDiagonal()->colorIndex = (0x001FC000 & self::_GetInt4d($recordData, 14)) >> 14;

                                        // bit: 24-21; mask: 0x01E00000; diagonal style
                                        if ($bordersDiagonalStyle = self::_mapBorderStyle((0x01E00000 & self::_GetInt4d($recordData, 14)) >> 21)) {
                                                $objStyle->getBorders()->getDiagonal()->setBorderStyle($bordersDiagonalStyle);
                                        }

                                        // bit: 31-26; mask: 0xFC000000 fill pattern
                                        if ($fillType = self::_mapFillPattern((0xFC000000 & self::_GetInt4d($recordData, 14)) >> 26)) {
                                                $objStyle->getFill()->setFillType($fillType);
                                        }
                                // offset: 18; size: 2; pattern and background colour
                                        // bit: 6-0; mask: 0x007F; color index for pattern color
                                        $objStyle->getFill()->startcolorIndex = (0x007F & self::_GetInt2d($recordData, 18)) >> 0;

                                        // bit: 13-7; mask: 0x3F80; color index for pattern background
                                        $objStyle->getFill()->endcolorIndex = (0x3F80 & self::_GetInt2d($recordData, 18)) >> 7;
                        } else {
                                // BIFF5

                                // offset: 7; size: 1; Text orientation and flags
                                $orientationAndFlags = ord($recordData{7});

                                // bit: 1-0; mask: 0x03; XF_ORIENTATION: Text orientation
                                $xfOrientation = (0x03 & $orientationAndFlags) >> 0;
                                switch ($xfOrientation) {
                                        case 0:
                                                $objStyle->getAlignment()->setTextRotation(0);
                                                break;
                                        case 1:
                                                $objStyle->getAlignment()->setTextRotation(-165);
                                                break;
                                        case 2:
                                                $objStyle->getAlignment()->setTextRotation(90);
                                                break;
                                        case 3:
                                                $objStyle->getAlignment()->setTextRotation(-90);
                                                break;
                                }

                                // offset: 8; size: 4; cell border lines and background area
                                $borderAndBackground = self::_GetInt4d($recordData, 8);

                                // bit: 6-0; mask: 0x0000007F; color index for pattern color
                                $objStyle->getFill()->startcolorIndex = (0x0000007F & $borderAndBackground) >> 0;

                                // bit: 13-7; mask: 0x00003F80; color index for pattern background
                                $objStyle->getFill()->endcolorIndex = (0x00003F80 & $borderAndBackground) >> 7;

                                // bit: 21-16; mask: 0x003F0000; fill pattern
                                $objStyle->getFill()->setFillType(self::_mapFillPattern((0x003F0000 & $borderAndBackground) >> 16));

                                // bit: 24-22; mask: 0x01C00000; bottom line style
                                $objStyle->getBorders()->getBottom()->setBorderStyle(self::_mapBorderStyle((0x01C00000 & $borderAndBackground) >> 22));

                                // bit: 31-25; mask: 0xFE000000; bottom line color
                                $objStyle->getBorders()->getBottom()->colorIndex = (0xFE000000 & $borderAndBackground) >> 25;

                                // offset: 12; size: 4; cell border lines
                                $borderLines = self::_GetInt4d($recordData, 12);

                                // bit: 2-0; mask: 0x00000007; top line style
                                $objStyle->getBorders()->getTop()->setBorderStyle(self::_mapBorderStyle((0x00000007 & $borderLines) >> 0));

                                // bit: 5-3; mask: 0x00000038; left line style
                                $objStyle->getBorders()->getLeft()->setBorderStyle(self::_mapBorderStyle((0x00000038 & $borderLines) >> 3));

                                // bit: 8-6; mask: 0x000001C0; right line style
                                $objStyle->getBorders()->getRight()->setBorderStyle(self::_mapBorderStyle((0x000001C0 & $borderLines) >> 6));

                                // bit: 15-9; mask: 0x0000FE00; top line color index
                                $objStyle->getBorders()->getTop()->colorIndex = (0x0000FE00 & $borderLines) >> 9;

                                // bit: 22-16; mask: 0x007F0000; left line color index
                                $objStyle->getBorders()->getLeft()->colorIndex = (0x007F0000 & $borderLines) >> 16;

                                // bit: 29-23; mask: 0x3F800000; right line color index
                                $objStyle->getBorders()->getRight()->colorIndex = (0x3F800000 & $borderLines) >> 23;
                        }

                        // add cellStyleXf or cellXf and update mapping
                        if ($isCellStyleXf) {
                                // we only read one style XF record which is always the first
                                if ($this->_xfIndex == 0) {
                                        $this->_phpExcel->addCellStyleXf($objStyle);
                                        $this->_mapCellStyleXfIndex[$this->_xfIndex] = 0;
                                }
                        } else {
                                // we read all cell XF records
                                $this->_phpExcel->addCellXf($objStyle);
                                $this->_mapCellXfIndex[$this->_xfIndex] = count($this->_phpExcel->getCellXfCollection()) - 1;
                        }

                        // update XF index for when we read next record
                        ++$this->_xfIndex;
                }
        }


        private function _readXfExt()
        {
                $length = self::_GetInt2d($this->_data, $this->_pos + 2);
                $recordData = $this->_readRecordData($this->_data, $this->_pos + 4, $length);

                // move stream pointer to next record
                $this->_pos += 4 + $length;

                if (!$this->_readDataOnly) {
                        // offset: 0; size: 2; 0x087D = repeated header

                        // offset: 2; size: 2

                        // offset: 4; size: 8; not used

                        // offset: 12; size: 2; record version

                        // offset: 14; size: 2; index to XF record which this record modifies
                        $ixfe = self::_GetInt2d($recordData, 14);

                        // offset: 16; size: 2; not used

                        // offset: 18; size: 2; number of extension properties that follow
                        $cexts = self::_GetInt2d($recordData, 18);

                        // start reading the actual extension data
                        $offset = 20;
                        while ($offset < $length) {
                                // extension type
                                $extType = self::_GetInt2d($recordData, $offset);

                                // extension length
                                $cb = self::_GetInt2d($recordData, $offset + 2);

                                // extension data
                                $extData = substr($recordData, $offset + 4, $cb);

                                switch ($extType) {
                                        case 4:         // fill start color
                                                $xclfType  = self::_GetInt2d($extData, 0); // color type
                                                $xclrValue = substr($extData, 4, 4); // color value (value based on color type)

                                                if ($xclfType == 2) {
                                                        $rgb = sprintf('%02X%02X%02X', ord($xclrValue{0}), ord($xclrValue{1}), ord($xclrValue{2}));

                                                        // modify the relevant style property
                                                        if ( isset($this->_mapCellXfIndex[$ixfe]) ) {
                                                                $fill = $this->_phpExcel->getCellXfByIndex($this->_mapCellXfIndex[$ixfe])->getFill();
                                                                $fill->getStartColor()->setRGB($rgb);
                                                                unset($fill->startcolorIndex); // normal color index does not apply, discard
                                                        }
                                                }
                                                break;

                                        case 5:         // fill end color
                                                $xclfType  = self::_GetInt2d($extData, 0); // color type
                                                $xclrValue = substr($extData, 4, 4); // color value (value based on color type)

                                                if ($xclfType == 2) {
                                                        $rgb = sprintf('%02X%02X%02X', ord($xclrValue{0}), ord($xclrValue{1}), ord($xclrValue{2}));

                                                        // modify the relevant style property
                                                        if ( isset($this->_mapCellXfIndex[$ixfe]) ) {
                                                                $fill = $this->_phpExcel->getCellXfByIndex($this->_mapCellXfIndex[$ixfe])->getFill();
                                                                $fill->getEndColor()->setRGB($rgb);
                                                                unset($fill->endcolorIndex); // normal color index does not apply, discard
                                                        }
                                                }
                                                break;

                                        case 7:         // border color top
                                                $xclfType  = self::_GetInt2d($extData, 0); // color type
                                                $xclrValue = substr($extData, 4, 4); // color value (value based on color type)

                                                if ($xclfType == 2) {
                                                        $rgb = sprintf('%02X%02X%02X', ord($xclrValue{0}), ord($xclrValue{1}), ord($xclrValue{2}));

                                                        // modify the relevant style property
                                                        if ( isset($this->_mapCellXfIndex[$ixfe]) ) {
                                                                $top = $this->_phpExcel->getCellXfByIndex($this->_mapCellXfIndex[$ixfe])->getBorders()->getTop();
                                                                $top->getColor()->setRGB($rgb);
                                                                unset($top->colorIndex); // normal color index does not apply, discard
                                                        }
                                                }
                                                break;

                                        case 8:         // border color bottom
                                                $xclfType  = self::_GetInt2d($extData, 0); // color type
                                                $xclrValue = substr($extData, 4, 4); // color value (value based on color type)

                                                if ($xclfType == 2) {
                                                        $rgb = sprintf('%02X%02X%02X', ord($xclrValue{0}), ord($xclrValue{1}), ord($xclrValue{2}));

                                                        // modify the relevant style property
                                                        if ( isset($this->_mapCellXfIndex[$ixfe]) ) {
                                                                $bottom = $this->_phpExcel->getCellXfByIndex($this->_mapCellXfIndex[$ixfe])->getBorders()->getBottom();
                                                                $bottom->getColor()->setRGB($rgb);
                                                                unset($bottom->colorIndex); // normal color index does not apply, discard
                                                        }
                                                }
                                                break;

                                        case 9:         // border color left
                                                $xclfType  = self::_GetInt2d($extData, 0); // color type
                                                $xclrValue = substr($extData, 4, 4); // color value (value based on color type)

                                                if ($xclfType == 2) {
                                                        $rgb = sprintf('%02X%02X%02X', ord($xclrValue{0}), ord($xclrValue{1}), ord($xclrValue{2}));

                                                        // modify the relevant style property
                                                        if ( isset($this->_mapCellXfIndex[$ixfe]) ) {
                                                                $left = $this->_phpExcel->getCellXfByIndex($this->_mapCellXfIndex[$ixfe])->getBorders()->getLeft();
                                                                $left->getColor()->setRGB($rgb);
                                                                unset($left->colorIndex); // normal color index does not apply, discard
                                                        }
                                                }
                                                break;

                                        case 10:                // border color right
                                                $xclfType  = self::_GetInt2d($extData, 0); // color type
                                                $xclrValue = substr($extData, 4, 4); // color value (value based on color type)

                                                if ($xclfType == 2) {
                                                        $rgb = sprintf('%02X%02X%02X', ord($xclrValue{0}), ord($xclrValue{1}), ord($xclrValue{2}));

                                                        // modify the relevant style property
                                                        if ( isset($this->_mapCellXfIndex[$ixfe]) ) {
                                                                $right = $this->_phpExcel->getCellXfByIndex($this->_mapCellXfIndex[$ixfe])->getBorders()->getRight();
                                                                $right->getColor()->setRGB($rgb);
                                                                unset($right->colorIndex); // normal color index does not apply, discard
                                                        }
                                                }
                                                break;

                                        case 11:                // border color diagonal
                                                $xclfType  = self::_GetInt2d($extData, 0); // color type
                                                $xclrValue = substr($extData, 4, 4); // color value (value based on color type)

                                                if ($xclfType == 2) {
                                                        $rgb = sprintf('%02X%02X%02X', ord($xclrValue{0}), ord($xclrValue{1}), ord($xclrValue{2}));

                                                        // modify the relevant style property
                                                        if ( isset($this->_mapCellXfIndex[$ixfe]) ) {
                                                                $diagonal = $this->_phpExcel->getCellXfByIndex($this->_mapCellXfIndex[$ixfe])->getBorders()->getDiagonal();
                                                                $diagonal->getColor()->setRGB($rgb);
                                                                unset($diagonal->colorIndex); // normal color index does not apply, discard
                                                        }
                                                }
                                                break;

                                        case 13:        // font color
                                                $xclfType  = self::_GetInt2d($extData, 0); // color type
                                                $xclrValue = substr($extData, 4, 4); // color value (value based on color type)

                                                if ($xclfType == 2) {
                                                        $rgb = sprintf('%02X%02X%02X', ord($xclrValue{0}), ord($xclrValue{1}), ord($xclrValue{2}));

                                                        // modify the relevant style property
                                                        if ( isset($this->_mapCellXfIndex[$ixfe]) ) {
                                                                $font = $this->_phpExcel->getCellXfByIndex($this->_mapCellXfIndex[$ixfe])->getFont();
                                                                $font->getColor()->setRGB($rgb);
                                                                unset($font->colorIndex); // normal color index does not apply, discard
                                                        }
                                                }
                                                break;
                                }

                                $offset += $cb;
                        }
                }

        }


        private function _readStyle()
        {
                $length = self::_GetInt2d($this->_data, $this->_pos + 2);
                $recordData = $this->_readRecordData($this->_data, $this->_pos + 4, $length);

                // move stream pointer to next record
                $this->_pos += 4 + $length;

                if (!$this->_readDataOnly) {
                        // offset: 0; size: 2; index to XF record and flag for built-in style
                        $ixfe = self::_GetInt2d($recordData, 0);

                        // bit: 11-0; mask 0x0FFF; index to XF record
                        $xfIndex = (0x0FFF & $ixfe) >> 0;

                        // bit: 15; mask 0x8000; 0 = user-defined style, 1 = built-in style
                        $isBuiltIn = (bool) ((0x8000 & $ixfe) >> 15);

                        if ($isBuiltIn) {
                                // offset: 2; size: 1; identifier for built-in style
                                $builtInId = ord($recordData{2});

                                switch ($builtInId) {
                                case 0x00:
                                        // currently, we are not using this for anything
                                        break;

                                default:
                                        break;
                                }

                        } else {
                                // user-defined; not supported by PHPExcel
                        }
                }
        }


        private function _readPalette()
        {
                $length = self::_GetInt2d($this->_data, $this->_pos + 2);
                $recordData = $this->_readRecordData($this->_data, $this->_pos + 4, $length);

                // move stream pointer to next record
                $this->_pos += 4 + $length;

                if (!$this->_readDataOnly) {
                        // offset: 0; size: 2; number of following colors
                        $nm = self::_GetInt2d($recordData, 0);

                        // list of RGB colors
                        for ($i = 0; $i < $nm; ++$i) {
                                $rgb = substr($recordData, 2 + 4 * $i, 4);
                                $this->_palette[] = self::_readRGB($rgb);
                        }
                }
        }


        private function _readSheet()
        {
                $length = self::_GetInt2d($this->_data, $this->_pos + 2);
                $recordData = $this->_readRecordData($this->_data, $this->_pos + 4, $length);

                // offset: 0; size: 4; absolute stream position of the BOF record of the sheet
                // NOTE: not encrypted
                $rec_offset = self::_GetInt4d($this->_data, $this->_pos + 4);

                // move stream pointer to next record
                $this->_pos += 4 + $length;

                // offset: 4; size: 1; sheet state
                switch (ord($recordData{4})) {
                        case 0x00: $sheetState = PHPExcel_Worksheet::SHEETSTATE_VISIBLE;    break;
                        case 0x01: $sheetState = PHPExcel_Worksheet::SHEETSTATE_HIDDEN;     break;
                        case 0x02: $sheetState = PHPExcel_Worksheet::SHEETSTATE_VERYHIDDEN; break;
                        default: $sheetState = PHPExcel_Worksheet::SHEETSTATE_VISIBLE;      break;
                }

                // offset: 5; size: 1; sheet type
                $sheetType = ord($recordData{5});

                // offset: 6; size: var; sheet name
                if ($this->_version == self::XLS_BIFF8) {
                        $string = self::_readUnicodeStringShort(substr($recordData, 6));
                        $rec_name = $string['value'];
                } elseif ($this->_version == self::XLS_BIFF7) {
                        $string = $this->_readByteStringShort(substr($recordData, 6));
                        $rec_name = $string['value'];
                }

                $this->_sheets[] = array(
                        'name' => $rec_name,
                        'offset' => $rec_offset,
                        'sheetState' => $sheetState,
                        'sheetType' => $sheetType,
                );
        }


        private function _readExternalBook()
        {
                $length = self::_GetInt2d($this->_data, $this->_pos + 2);
                $recordData = $this->_readRecordData($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)
                        $encodedUrlString = self::_readUnicodeStringLong(substr($recordData, 2));
                        $offset += $encodedUrlString['size'];

                        // offset: var; size: var; list of $nm sheet names (Unicode strings, 16-bit length)
                        $externalSheetNames = array();
                        for ($i = 0; $i < $nm; ++$i) {
                                $externalSheetNameString = self::_readUnicodeStringLong(substr($recordData, $offset));
                                $externalSheetNames[] = $externalSheetNameString['value'];
                                $offset += $externalSheetNameString['size'];
                        }

                        // store the record data
                        $this->_externalBooks[] = array(
                                'type' => 'external',
                                'encodedUrl' => $encodedUrlString['value'],
                                'externalSheetNames' => $externalSheetNames,
                        );

                } elseif (substr($recordData, 2, 2) == pack('CC', 0x01, 0x04)) {
                        // internal reference
                        // offset: 0; size: 2; number of sheet in this document
                        // offset: 2; size: 2; 0x01 0x04
                        $this->_externalBooks[] = array(
                                'type' => 'internal',
                        );
                } elseif (substr($recordData, 0, 4) == pack('vCC', 0x0001, 0x01, 0x3A)) {
                        // add-in function
                        // offset: 0; size: 2; 0x0001
                        $this->_externalBooks[] = array(
                                'type' => 'addInFunction',
                        );
                } elseif (substr($recordData, 0, 2) == pack('v', 0x0000)) {
                        // DDE links, OLE links
                        // offset: 0; size: 2; 0x0000
                        // offset: 2; size: var; encoded source document name
                        $this->_externalBooks[] = array(
                                'type' => 'DDEorOLE',
                        );
                }
        }


        private function _readExternName()
        {
                $length = self::_GetInt2d($this->_data, $this->_pos + 2);
                $recordData = $this->_readRecordData($this->_data, $this->_pos + 4, $length);

                // move stream pointer to next record
                $this->_pos += 4 + $length;

                // external sheet references provided for named cells
                if ($this->_version == self::XLS_BIFF8) {
                        // offset: 0; size: 2; options
                        $options = self::_GetInt2d($recordData, 0);

                        // offset: 2; size: 2;

                        // offset: 4; size: 2; not used

                        // offset: 6; size: var
                        $nameString = self::_readUnicodeStringShort(substr($recordData, 6));

                        // offset: var; size: var; formula data
                        $offset = 6 + $nameString['size'];
                        $formula = $this->_getFormulaFromStructure(substr($recordData, $offset));

                        $this->_externalNames[] = array(
                                'name' => $nameString['value'],
                                'formula' => $formula,
                        );
                }
        }


        private function _readExternSheet()
        {
                $length = self::_GetInt2d($this->_data, $this->_pos + 2);
                $recordData = $this->_readRecordData($this->_data, $this->_pos + 4, $length);

                // move stream pointer to next record
                $this->_pos += 4 + $length;

                // external sheet references provided for named cells
                if ($this->_version == self::XLS_BIFF8) {
                        // offset: 0; size: 2; number of following ref structures
                        $nm = self::_GetInt2d($recordData, 0);
                        for ($i = 0; $i < $nm; ++$i) {
                                $this->_ref[] = array(
                                        // offset: 2 + 6 * $i; index to EXTERNALBOOK record
                                        'externalBookIndex' => self::_GetInt2d($recordData, 2 + 6 * $i),
                                        // offset: 4 + 6 * $i; index to first sheet in EXTERNALBOOK record
                                        'firstSheetIndex' => self::_GetInt2d($recordData, 4 + 6 * $i),
                                        // offset: 6 + 6 * $i; index to last sheet in EXTERNALBOOK record
                                        'lastSheetIndex' => self::_GetInt2d($recordData, 6 + 6 * $i),
                                );
                        }
                }
        }


        private function _readDefinedName()
        {
                $length = self::_GetInt2d($this->_data, $this->_pos + 2);
                $recordData = $this->_readRecordData($this->_data, $this->_pos + 4, $length);

                // move stream pointer to next record
                $this->_pos += 4 + $length;

                if ($this->_version == self::XLS_BIFF8) {
                        // retrieves named cells

                        // offset: 0; size: 2; option flags
                        $opts = self::_GetInt2d($recordData, 0);

                                // bit: 5; mask: 0x0020; 0 = user-defined name, 1 = built-in-name
                                $isBuiltInName = (0x0020 & $opts) >> 5;

                        // offset: 2; size: 1; keyboard shortcut

                        // offset: 3; size: 1; length of the name (character count)
                        $nlen = ord($recordData{3});

                        // offset: 4; size: 2; size of the formula data (it can happen that this is zero)
                        // note: there can also be additional data, this is not included in $flen
                        $flen = self::_GetInt2d($recordData, 4);

                        // offset: 8; size: 2; 0=Global name, otherwise index to sheet (1-based)
                        $scope = self::_GetInt2d($recordData, 8);

                        // offset: 14; size: var; Name (Unicode string without length field)
                        $string = self::_readUnicodeString(substr($recordData, 14), $nlen);

                        // offset: var; size: $flen; formula data
                        $offset = 14 + $string['size'];
                        $formulaStructure = pack('v', $flen) . substr($recordData, $offset);

                        try {
                                $formula = $this->_getFormulaFromStructure($formulaStructure);
                        } catch (PHPExcel_Exception $e) {
                                $formula = '';
                        }

                        $this->_definedname[] = array(
                                'isBuiltInName' => $isBuiltInName,
                                'name' => $string['value'],
                                'formula' => $formula,
                                'scope' => $scope,
                        );
                }
        }


        private function _readMsoDrawingGroup()
        {
                $length = self::_GetInt2d($this->_data, $this->_pos + 2);

                // get spliced record data
                $splicedRecordData = $this->_getSplicedRecordData();
                $recordData = $splicedRecordData['recordData'];

                $this->_drawingGroupData .= $recordData;
        }


        private function _readSst()
        {
                // offset within (spliced) record data
                $pos = 0;

                // get spliced record data
                $splicedRecordData = $this->_getSplicedRecordData();

                $recordData = $splicedRecordData['recordData'];
                $spliceOffsets = $splicedRecordData['spliceOffsets'];

                // offset: 0; size: 4; total number of strings in the workbook
                $pos += 4;

                // offset: 4; size: 4; number of following strings ($nm)
                $nm = self::_GetInt4d($recordData, 4);
                $pos += 4;

                // loop through the Unicode strings (16-bit length)
                for ($i = 0; $i < $nm; ++$i) {

                        // number of characters in the Unicode string
                        $numChars = self::_GetInt2d($recordData, $pos);
                        $pos += 2;

                        // option flags
                        $optionFlags = ord($recordData{$pos});
                        ++$pos;

                        // bit: 0; mask: 0x01; 0 = compressed; 1 = uncompressed
                        $isCompressed = (($optionFlags & 0x01) == 0) ;

                        // bit: 2; mask: 0x02; 0 = ordinary; 1 = Asian phonetic
                        $hasAsian = (($optionFlags & 0x04) != 0);

                        // bit: 3; mask: 0x03; 0 = ordinary; 1 = Rich-Text
                        $hasRichText = (($optionFlags & 0x08) != 0);

                        if ($hasRichText) {
                                // number of Rich-Text formatting runs
                                $formattingRuns = self::_GetInt2d($recordData, $pos);
                                $pos += 2;
                        }

                        if ($hasAsian) {
                                // size of Asian phonetic setting
                                $extendedRunLength = self::_GetInt4d($recordData, $pos);
                                $pos += 4;
                        }

                        // expected byte length of character array if not split
                        $len = ($isCompressed) ? $numChars : $numChars * 2;

                        // look up limit position
                        foreach ($spliceOffsets as $spliceOffset) {
                                // it can happen that the string is empty, therefore we need
                                // <= and not just <
                                if ($pos <= $spliceOffset) {
                                        $limitpos = $spliceOffset;
                                        break;
                                }
                        }

                        if ($pos + $len <= $limitpos) {
                                // character array is not split between records

                                $retstr = substr($recordData, $pos, $len);
                                $pos += $len;

                        } else {
                                // character array is split between records

                                // first part of character array
                                $retstr = substr($recordData, $pos, $limitpos - $pos);

                                $bytesRead = $limitpos - $pos;

                                // remaining characters in Unicode string
                                $charsLeft = $numChars - (($isCompressed) ? $bytesRead : ($bytesRead / 2));

                                $pos = $limitpos;

                                // keep reading the characters
                                while ($charsLeft > 0) {

                                        // look up next limit position, in case the string span more than one continue record
                                        foreach ($spliceOffsets as $spliceOffset) {
                                                if ($pos < $spliceOffset) {
                                                        $limitpos = $spliceOffset;
                                                        break;
                                                }
                                        }

                                        // repeated option flags
                                        // OpenOffice.org documentation 5.21
                                        $option = ord($recordData{$pos});
                                        ++$pos;

                                        if ($isCompressed && ($option == 0)) {
                                                // 1st fragment compressed
                                                // this fragment compressed
                                                $len = min($charsLeft, $limitpos - $pos);
                                                $retstr .= substr($recordData, $pos, $len);
                                                $charsLeft -= $len;
                                                $isCompressed = true;

                                        } elseif (!$isCompressed && ($option != 0)) {
                                                // 1st fragment uncompressed
                                                // this fragment uncompressed
                                                $len = min($charsLeft * 2, $limitpos - $pos);
                                                $retstr .= substr($recordData, $pos, $len);
                                                $charsLeft -= $len / 2;
                                                $isCompressed = false;

                                        } elseif (!$isCompressed && ($option == 0)) {
                                                // 1st fragment uncompressed
                                                // this fragment compressed
                                                $len = min($charsLeft, $limitpos - $pos);
                                                for ($j = 0; $j < $len; ++$j) {
                                                        $retstr .= $recordData{$pos + $j} . chr(0);
                                                }
                                                $charsLeft -= $len;
                                                $isCompressed = false;

                                        } else {
                                                // 1st fragment compressed
                                                // this fragment uncompressed
                                                $newstr = '';
                                                for ($j = 0; $j < strlen($retstr); ++$j) {
                                                        $newstr .= $retstr[$j] . chr(0);
                                                }
                                                $retstr = $newstr;
                                                $len = min($charsLeft * 2, $limitpos - $pos);
                                                $retstr .= substr($recordData, $pos, $len);
                                                $charsLeft -= $len / 2;
                                                $isCompressed = false;
                                        }

                                        $pos += $len;
                                }
                        }

                        // convert to UTF-8
                        $retstr = self::_encodeUTF16($retstr, $isCompressed);

                        // read additional Rich-Text information, if any
                        $fmtRuns = array();
                        if ($hasRichText) {
                                // list of formatting runs
                                for ($j = 0; $j < $formattingRuns; ++$j) {
                                        // first formatted character; zero-based
                                        $charPos = self::_GetInt2d($recordData, $pos + $j * 4);

                                        // index to font record
                                        $fontIndex = self::_GetInt2d($recordData, $pos + 2 + $j * 4);

                                        $fmtRuns[] = array(
                                                'charPos' => $charPos,
                                                'fontIndex' => $fontIndex,
                                        );
                                }
                                $pos += 4 * $formattingRuns;
                        }

                        // read additional Asian phonetics information, if any
                        if ($hasAsian) {
                                // For Asian phonetic settings, we skip the extended string data
                                $pos += $extendedRunLength;
                        }

                        // store the shared sting
                        $this->_sst[] = array(
                                'value' => $retstr,
                                'fmtRuns' => $fmtRuns,
                        );
                }

                // _getSplicedRecordData() takes care of moving current position in data stream
        }


        private function _readPrintGridlines()
        {
                $length = self::_GetInt2d($this->_data, $this->_pos + 2);
                $recordData = $this->_readRecordData($this->_data, $this->_pos + 4, $length);

                // move stream pointer to next record
                $this->_pos += 4 + $length;

                if ($this->_version == self::XLS_BIFF8 && !$this->_readDataOnly) {
                        // offset: 0; size: 2; 0 = do not print sheet grid lines; 1 = print sheet gridlines
                        $printGridlines = (bool) self::_GetInt2d($recordData, 0);
                        $this->_phpSheet->setPrintGridlines($printGridlines);
                }
        }


        private function _readDefaultRowHeight()
        {
                $length = self::_GetInt2d($this->_data, $this->_pos + 2);
                $recordData = $this->_readRecordData($this->_data, $this->_pos + 4, $length);

                // move stream pointer to next record
                $this->_pos += 4 + $length;

                // offset: 0; size: 2; option flags
                // offset: 2; size: 2; default height for unused rows, (twips 1/20 point)
                $height = self::_GetInt2d($recordData, 2);
                $this->_phpSheet->getDefaultRowDimension()->setRowHeight($height / 20);
        }


        private function _readSheetPr()
        {
                $length = self::_GetInt2d($this->_data, $this->_pos + 2);
                $recordData = $this->_readRecordData($this->_data, $this->_pos + 4, $length);

                // move stream pointer to next record
                $this->_pos += 4 + $length;

                // offset: 0; size: 2

                // bit: 6; mask: 0x0040; 0 = outline buttons above outline group
                $isSummaryBelow = (0x0040 & self::_GetInt2d($recordData, 0)) >> 6;
                $this->_phpSheet->setShowSummaryBelow($isSummaryBelow);

                // bit: 7; mask: 0x0080; 0 = outline buttons left of outline group
                $isSummaryRight = (0x0080 & self::_GetInt2d($recordData, 0)) >> 7;
                $this->_phpSheet->setShowSummaryRight($isSummaryRight);

                // bit: 8; mask: 0x100; 0 = scale printout in percent, 1 = fit printout to number of pages
                // this corresponds to radio button setting in page setup dialog in Excel
                $this->_isFitToPages = (bool) ((0x0100 & self::_GetInt2d($recordData, 0)) >> 8);
        }


        private function _readHorizontalPageBreaks()
        {
                $length = self::_GetInt2d($this->_data, $this->_pos + 2);
                $recordData = $this->_readRecordData($this->_data, $this->_pos + 4, $length);

                // move stream pointer to next record
                $this->_pos += 4 + $length;

                if ($this->_version == self::XLS_BIFF8 && !$this->_readDataOnly) {

                        // offset: 0; size: 2; number of the following row index structures
                        $nm = self::_GetInt2d($recordData, 0);

                        // offset: 2; size: 6 * $nm; list of $nm row index structures
                        for ($i = 0; $i < $nm; ++$i) {
                                $r = self::_GetInt2d($recordData, 2 + 6 * $i);
                                $cf = self::_GetInt2d($recordData, 2 + 6 * $i + 2);
                                $cl = self::_GetInt2d($recordData, 2 + 6 * $i + 4);

                                // not sure why two column indexes are necessary?
                                $this->_phpSheet->setBreakByColumnAndRow($cf, $r, PHPExcel_Worksheet::BREAK_ROW);
                        }
                }
        }


        private function _readVerticalPageBreaks()
        {
                $length = self::_GetInt2d($this->_data, $this->_pos + 2);
                $recordData = $this->_readRecordData($this->_data, $this->_pos + 4, $length);

                // move stream pointer to next record
                $this->_pos += 4 + $length;

                if ($this->_version == self::XLS_BIFF8 && !$this->_readDataOnly) {
                        // offset: 0; size: 2; number of the following column index structures
                        $nm = self::_GetInt2d($recordData, 0);

                        // offset: 2; size: 6 * $nm; list of $nm row index structures
                        for ($i = 0; $i < $nm; ++$i) {
                                $c = self::_GetInt2d($recordData, 2 + 6 * $i);
                                $rf = self::_GetInt2d($recordData, 2 + 6 * $i + 2);
                                $rl = self::_GetInt2d($recordData, 2 + 6 * $i + 4);

                                // not sure why two row indexes are necessary?
                                $this->_phpSheet->setBreakByColumnAndRow($c, $rf, PHPExcel_Worksheet::BREAK_COLUMN);
                        }
                }
        }


        private function _readHeader()
        {
                $length = self::_GetInt2d($this->_data, $this->_pos + 2);
                $recordData = $this->_readRecordData($this->_data, $this->_pos + 4, $length);

                // move stream pointer to next record
                $this->_pos += 4 + $length;

                if (!$this->_readDataOnly) {
                        // offset: 0; size: var
                        // realized that $recordData can be empty even when record exists
                        if ($recordData) {
                                if ($this->_version == self::XLS_BIFF8) {
                                        $string = self::_readUnicodeStringLong($recordData);
                                } else {
                                        $string = $this->_readByteStringShort($recordData);
                                }

                                $this->_phpSheet->getHeaderFooter()->setOddHeader($string['value']);
                                $this->_phpSheet->getHeaderFooter()->setEvenHeader($string['value']);
                        }
                }
        }


        private function _readFooter()
        {
                $length = self::_GetInt2d($this->_data, $this->_pos + 2);
                $recordData = $this->_readRecordData($this->_data, $this->_pos + 4, $length);

                // move stream pointer to next record
                $this->_pos += 4 + $length;

                if (!$this->_readDataOnly) {
                        // offset: 0; size: var
                        // realized that $recordData can be empty even when record exists
                        if ($recordData) {
                                if ($this->_version == self::XLS_BIFF8) {
                                        $string = self::_readUnicodeStringLong($recordData);
                                } else {
                                        $string = $this->_readByteStringShort($recordData);
                                }
                                $this->_phpSheet->getHeaderFooter()->setOddFooter($string['value']);
                                $this->_phpSheet->getHeaderFooter()->setEvenFooter($string['value']);
                        }
                }
        }


        private function _readHcenter()
        {
                $length = self::_GetInt2d($this->_data, $this->_pos + 2);
                $recordData = $this->_readRecordData($this->_data, $this->_pos + 4, $length);

                // move stream pointer to next record
                $this->_pos += 4 + $length;

                if (!$this->_readDataOnly) {
                        // offset: 0; size: 2; 0 = print sheet left aligned, 1 = print sheet centered horizontally
                        $isHorizontalCentered = (bool) self::_GetInt2d($recordData, 0);

                        $this->_phpSheet->getPageSetup()->setHorizontalCentered($isHorizontalCentered);
                }
        }


        private function _readVcenter()
        {
                $length = self::_GetInt2d($this->_data, $this->_pos + 2);
                $recordData = $this->_readRecordData($this->_data, $this->_pos + 4, $length);

                // move stream pointer to next record
                $this->_pos += 4 + $length;

                if (!$this->_readDataOnly) {
                        // offset: 0; size: 2; 0 = print sheet aligned at top page border, 1 = print sheet vertically centered
                        $isVerticalCentered = (bool) self::_GetInt2d($recordData, 0);

                        $this->_phpSheet->getPageSetup()->setVerticalCentered($isVerticalCentered);
                }
        }


        private function _readLeftMargin()
        {
                $length = self::_GetInt2d($this->_data, $this->_pos + 2);
                $recordData = $this->_readRecordData($this->_data, $this->_pos + 4, $length);

                // move stream pointer to next record
                $this->_pos += 4 + $length;

                if (!$this->_readDataOnly) {
                        // offset: 0; size: 8
                        $this->_phpSheet->getPageMargins()->setLeft(self::_extractNumber($recordData));
                }
        }


        private function _readRightMargin()
        {
                $length = self::_GetInt2d($this->_data, $this->_pos + 2);
                $recordData = $this->_readRecordData($this->_data, $this->_pos + 4, $length);

                // move stream pointer to next record
                $this->_pos += 4 + $length;

                if (!$this->_readDataOnly) {
                        // offset: 0; size: 8
                        $this->_phpSheet->getPageMargins()->setRight(self::_extractNumber($recordData));
                }
        }


        private function _readTopMargin()
        {
                $length = self::_GetInt2d($this->_data, $this->_pos + 2);
                $recordData = $this->_readRecordData($this->_data, $this->_pos + 4, $length);

                // move stream pointer to next record
                $this->_pos += 4 + $length;

                if (!$this->_readDataOnly) {
                        // offset: 0; size: 8
                        $this->_phpSheet->getPageMargins()->setTop(self::_extractNumber($recordData));
                }
        }


        private function _readBottomMargin()
        {
                $length = self::_GetInt2d($this->_data, $this->_pos + 2);
                $recordData = $this->_readRecordData($this->_data, $this->_pos + 4, $length);

                // move stream pointer to next record
                $this->_pos += 4 + $length;

                if (!$this->_readDataOnly) {
                        // offset: 0; size: 8
                        $this->_phpSheet->getPageMargins()->setBottom(self::_extractNumber($recordData));
                }
        }


        private function _readPageSetup()
        {
                $length = self::_GetInt2d($this->_data, $this->_pos + 2);
                $recordData = $this->_readRecordData($this->_data, $this->_pos + 4, $length);

                // move stream pointer to next record
                $this->_pos += 4 + $length;

                if (!$this->_readDataOnly) {
                        // offset: 0; size: 2; paper size
                        $paperSize = self::_GetInt2d($recordData, 0);

                        // offset: 2; size: 2; scaling factor
                        $scale = self::_GetInt2d($recordData, 2);

                        // offset: 6; size: 2; fit worksheet width to this number of pages, 0 = use as many as needed
                        $fitToWidth = self::_GetInt2d($recordData, 6);

                        // offset: 8; size: 2; fit worksheet height to this number of pages, 0 = use as many as needed
                        $fitToHeight = self::_GetInt2d($recordData, 8);

                        // offset: 10; size: 2; option flags

                                // bit: 1; mask: 0x0002; 0=landscape, 1=portrait
                                $isPortrait = (0x0002 & self::_GetInt2d($recordData, 10)) >> 1;

                                // bit: 2; mask: 0x0004; 1= paper size, scaling factor, paper orient. not init
                                // when this bit is set, do not use flags for those properties
                                $isNotInit = (0x0004 & self::_GetInt2d($recordData, 10)) >> 2;

                        if (!$isNotInit) {
                                $this->_phpSheet->getPageSetup()->setPaperSize($paperSize);
                                switch ($isPortrait) {
                                case 0: $this->_phpSheet->getPageSetup()->setOrientation(PHPExcel_Worksheet_PageSetup::ORIENTATION_LANDSCAPE); break;
                                case 1: $this->_phpSheet->getPageSetup()->setOrientation(PHPExcel_Worksheet_PageSetup::ORIENTATION_PORTRAIT); break;
                                }

                                $this->_phpSheet->getPageSetup()->setScale($scale, false);
                                $this->_phpSheet->getPageSetup()->setFitToPage((bool) $this->_isFitToPages);
                                $this->_phpSheet->getPageSetup()->setFitToWidth($fitToWidth, false);
                                $this->_phpSheet->getPageSetup()->setFitToHeight($fitToHeight, false);
                        }

                        // offset: 16; size: 8; header margin (IEEE 754 floating-point value)
                        $marginHeader = self::_extractNumber(substr($recordData, 16, 8));
                        $this->_phpSheet->getPageMargins()->setHeader($marginHeader);

                        // offset: 24; size: 8; footer margin (IEEE 754 floating-point value)
                        $marginFooter = self::_extractNumber(substr($recordData, 24, 8));
                        $this->_phpSheet->getPageMargins()->setFooter($marginFooter);
                }
        }


        private function _readProtect()
        {
                $length = self::_GetInt2d($this->_data, $this->_pos + 2);
                $recordData = $this->_readRecordData($this->_data, $this->_pos + 4, $length);

                // move stream pointer to next record
                $this->_pos += 4 + $length;

                if ($this->_readDataOnly) {
                        return;
                }

                // offset: 0; size: 2;

                // bit 0, mask 0x01; 1 = sheet is protected
                $bool = (0x01 & self::_GetInt2d($recordData, 0)) >> 0;
                $this->_phpSheet->getProtection()->setSheet((bool)$bool);
        }


        private function _readScenProtect()
        {
                $length = self::_GetInt2d($this->_data, $this->_pos + 2);
                $recordData = $this->_readRecordData($this->_data, $this->_pos + 4, $length);

                // move stream pointer to next record
                $this->_pos += 4 + $length;

                if ($this->_readDataOnly) {
                        return;
                }

                // offset: 0; size: 2;

                // bit: 0, mask 0x01; 1 = scenarios are protected
                $bool = (0x01 & self::_GetInt2d($recordData, 0)) >> 0;

                $this->_phpSheet->getProtection()->setScenarios((bool)$bool);
        }


        private function _readObjectProtect()
        {
                $length = self::_GetInt2d($this->_data, $this->_pos + 2);
                $recordData = $this->_readRecordData($this->_data, $this->_pos + 4, $length);

                // move stream pointer to next record
                $this->_pos += 4 + $length;

                if ($this->_readDataOnly) {
                        return;
                }

                // offset: 0; size: 2;

                // bit: 0, mask 0x01; 1 = objects are protected
                $bool = (0x01 & self::_GetInt2d($recordData, 0)) >> 0;

                $this->_phpSheet->getProtection()->setObjects((bool)$bool);
        }


        private function _readPassword()
        {
                $length = self::_GetInt2d($this->_data, $this->_pos + 2);
                $recordData = $this->_readRecordData($this->_data, $this->_pos + 4, $length);

                // move stream pointer to next record
                $this->_pos += 4 + $length;

                if (!$this->_readDataOnly) {
                        // offset: 0; size: 2; 16-bit hash value of password
                        $password = strtoupper(dechex(self::_GetInt2d($recordData, 0))); // the hashed password
                        $this->_phpSheet->getProtection()->setPassword($password, true);
                }
        }


        private function _readDefColWidth()
        {
                $length = self::_GetInt2d($this->_data, $this->_pos + 2);
                $recordData = $this->_readRecordData($this->_data, $this->_pos + 4, $length);

                // move stream pointer to next record
                $this->_pos += 4 + $length;

                // offset: 0; size: 2; default column width
                $width = self::_GetInt2d($recordData, 0);
                if ($width != 8) {
                        $this->_phpSheet->getDefaultColumnDimension()->setWidth($width);
                }
        }


        private function _readColInfo()
        {
                $length = self::_GetInt2d($this->_data, $this->_pos + 2);
                $recordData = $this->_readRecordData($this->_data, $this->_pos + 4, $length);

                // move stream pointer to next record
                $this->_pos += 4 + $length;

                if (!$this->_readDataOnly) {
                        // offset: 0; size: 2; index to first column in range
                        $fc = self::_GetInt2d($recordData, 0); // first column index

                        // offset: 2; size: 2; index to last column in range
                        $lc = self::_GetInt2d($recordData, 2); // first column index

                        // offset: 4; size: 2; width of the column in 1/256 of the width of the zero character
                        $width = self::_GetInt2d($recordData, 4);

                        // offset: 6; size: 2; index to XF record for default column formatting
                        $xfIndex = self::_GetInt2d($recordData, 6);

                        // offset: 8; size: 2; option flags

                                // bit: 0; mask: 0x0001; 1= columns are hidden
                                $isHidden = (0x0001 & self::_GetInt2d($recordData, 8)) >> 0;

                                // bit: 10-8; mask: 0x0700; outline level of the columns (0 = no outline)
                                $level = (0x0700 & self::_GetInt2d($recordData, 8)) >> 8;

                                // bit: 12; mask: 0x1000; 1 = collapsed
                                $isCollapsed = (0x1000 & self::_GetInt2d($recordData, 8)) >> 12;

                        // offset: 10; size: 2; not used

                        for ($i = $fc; $i <= $lc; ++$i) {
                                if ($lc == 255 || $lc == 256) {
                                        $this->_phpSheet->getDefaultColumnDimension()->setWidth($width / 256);
                                        break;
                                }
                                $this->_phpSheet->getColumnDimensionByColumn($i)->setWidth($width / 256);
                                $this->_phpSheet->getColumnDimensionByColumn($i)->setVisible(!$isHidden);
                                $this->_phpSheet->getColumnDimensionByColumn($i)->setOutlineLevel($level);
                                $this->_phpSheet->getColumnDimensionByColumn($i)->setCollapsed($isCollapsed);
                                $this->_phpSheet->getColumnDimensionByColumn($i)->setXfIndex($this->_mapCellXfIndex[$xfIndex]);
                        }
                }
        }


        private function _readRow()
        {
                $length = self::_GetInt2d($this->_data, $this->_pos + 2);
                $recordData = $this->_readRecordData($this->_data, $this->_pos + 4, $length);

                // move stream pointer to next record
                $this->_pos += 4 + $length;

                if (!$this->_readDataOnly) {
                        // offset: 0; size: 2; index of this row
                        $r = self::_GetInt2d($recordData, 0);

                        // offset: 2; size: 2; index to column of the first cell which is described by a cell record

                        // offset: 4; size: 2; index to column of the last cell which is described by a cell record, increased by 1

                        // offset: 6; size: 2;

                        // bit: 14-0; mask: 0x7FFF; height of the row, in twips = 1/20 of a point
                        $height = (0x7FFF & self::_GetInt2d($recordData, 6)) >> 0;

                        // bit: 15: mask: 0x8000; 0 = row has custom height; 1= row has default height
                        $useDefaultHeight = (0x8000 & self::_GetInt2d($recordData, 6)) >> 15;

                        if (!$useDefaultHeight) {
                                $this->_phpSheet->getRowDimension($r + 1)->setRowHeight($height / 20);
                        }

                        // offset: 8; size: 2; not used

                        // offset: 10; size: 2; not used in BIFF5-BIFF8

                        // offset: 12; size: 4; option flags and default row formatting

                        // bit: 2-0: mask: 0x00000007; outline level of the row
                        $level = (0x00000007 & self::_GetInt4d($recordData, 12)) >> 0;
                        $this->_phpSheet->getRowDimension($r + 1)->setOutlineLevel($level);

                        // bit: 4; mask: 0x00000010; 1 = outline group start or ends here... and is collapsed
                        $isCollapsed = (0x00000010 & self::_GetInt4d($recordData, 12)) >> 4;
                        $this->_phpSheet->getRowDimension($r + 1)->setCollapsed($isCollapsed);

                        // bit: 5; mask: 0x00000020; 1 = row is hidden
                        $isHidden = (0x00000020 & self::_GetInt4d($recordData, 12)) >> 5;
                        $this->_phpSheet->getRowDimension($r + 1)->setVisible(!$isHidden);

                        // bit: 7; mask: 0x00000080; 1 = row has explicit format
                        $hasExplicitFormat = (0x00000080 & self::_GetInt4d($recordData, 12)) >> 7;

                        // bit: 27-16; mask: 0x0FFF0000; only applies when hasExplicitFormat = 1; index to XF record
                        $xfIndex = (0x0FFF0000 & self::_GetInt4d($recordData, 12)) >> 16;

                        if ($hasExplicitFormat) {
                                $this->_phpSheet->getRowDimension($r + 1)->setXfIndex($this->_mapCellXfIndex[$xfIndex]);
                        }
                }
        }


        private function _readRk()
        {
                $length = self::_GetInt2d($this->_data, $this->_pos + 2);
                $recordData = $this->_readRecordData($this->_data, $this->_pos + 4, $length);

                // move stream pointer to next record
                $this->_pos += 4 + $length;

                // offset: 0; size: 2; index to row
                $row = self::_GetInt2d($recordData, 0);

                // offset: 2; size: 2; index to column
                $column = self::_GetInt2d($recordData, 2);
                $columnString = PHPExcel_Cell::stringFromColumnIndex($column);

                // Read cell?
                if (($this->getReadFilter() !== NULL) && $this->getReadFilter()->readCell($columnString, $row + 1, $this->_phpSheet->getTitle()) ) {
                        // offset: 4; size: 2; index to XF record
                        $xfIndex = self::_GetInt2d($recordData, 4);

                        // offset: 6; size: 4; RK value
                        $rknum = self::_GetInt4d($recordData, 6);
                        $numValue = self::_GetIEEE754($rknum);

                        $cell = $this->_phpSheet->getCell($columnString . ($row + 1));
                        if (!$this->_readDataOnly) {
                                // add style information
                                $cell->setXfIndex($this->_mapCellXfIndex[$xfIndex]);
                        }

                        // add cell
                        $cell->setValueExplicit($numValue, PHPExcel_Cell_DataType::TYPE_NUMERIC);
                }
        }


        private function _readLabelSst()
        {
                $length = self::_GetInt2d($this->_data, $this->_pos + 2);
                $recordData = $this->_readRecordData($this->_data, $this->_pos + 4, $length);

                // move stream pointer to next record
                $this->_pos += 4 + $length;

                // offset: 0; size: 2; index to row
                $row = self::_GetInt2d($recordData, 0);

                // offset: 2; size: 2; index to column
                $column = self::_GetInt2d($recordData, 2);
                $columnString = PHPExcel_Cell::stringFromColumnIndex($column);

                // Read cell?
                if (($this->getReadFilter() !== NULL) && $this->getReadFilter()->readCell($columnString, $row + 1, $this->_phpSheet->getTitle()) ) {
                        // offset: 4; size: 2; index to XF record
                        $xfIndex = self::_GetInt2d($recordData, 4);

                        // offset: 6; size: 4; index to SST record
                        $index = self::_GetInt4d($recordData, 6);

                        // add cell
                        if (($fmtRuns = $this->_sst[$index]['fmtRuns']) && !$this->_readDataOnly) {
                                // then we should treat as rich text
                                $richText = new PHPExcel_RichText();
                                $charPos = 0;
                                $sstCount = count($this->_sst[$index]['fmtRuns']);
                                for ($i = 0; $i <= $sstCount; ++$i) {
                                        if (isset($fmtRuns[$i])) {
                                                $text = PHPExcel_Shared_String::Substring($this->_sst[$index]['value'], $charPos, $fmtRuns[$i]['charPos'] - $charPos);
                                                $charPos = $fmtRuns[$i]['charPos'];
                                        } else {
                                                $text = PHPExcel_Shared_String::Substring($this->_sst[$index]['value'], $charPos, PHPExcel_Shared_String::CountCharacters($this->_sst[$index]['value']));
                                        }

                                        if (PHPExcel_Shared_String::CountCharacters($text) > 0) {
                                                if ($i == 0) { // first text run, no style
                                                        $richText->createText($text);
                                                } else {
                                                        $textRun = $richText->createTextRun($text);
                                                        if (isset($fmtRuns[$i - 1])) {
                                                                if ($fmtRuns[$i - 1]['fontIndex'] < 4) {
                                                                        $fontIndex = $fmtRuns[$i - 1]['fontIndex'];
                                                                } else {
                                                                        // this has to do with that index 4 is omitted in all BIFF versions for some strange reason
                                                                        // check the OpenOffice documentation of the FONT record
                                                                        $fontIndex = $fmtRuns[$i - 1]['fontIndex'] - 1;
                                                                }
                                                                $textRun->setFont(clone $this->_objFonts[$fontIndex]);
                                                        }
                                                }
                                        }
                                }
                                $cell = $this->_phpSheet->getCell($columnString . ($row + 1));
                                $cell->setValueExplicit($richText, PHPExcel_Cell_DataType::TYPE_STRING);
                        } else {
                                $cell = $this->_phpSheet->getCell($columnString . ($row + 1));
                                $cell->setValueExplicit($this->_sst[$index]['value'], PHPExcel_Cell_DataType::TYPE_STRING);
                        }

                        if (!$this->_readDataOnly) {
                                // add style information
                                $cell->setXfIndex($this->_mapCellXfIndex[$xfIndex]);
                        }
                }
        }


        private function _readMulRk()
        {
                $length = self::_GetInt2d($this->_data, $this->_pos + 2);
                $recordData = $this->_readRecordData($this->_data, $this->_pos + 4, $length);

                // move stream pointer to next record
                $this->_pos += 4 + $length;

                // offset: 0; size: 2; index to row
                $row = self::_GetInt2d($recordData, 0);

                // offset: 2; size: 2; index to first column
                $colFirst = self::_GetInt2d($recordData, 2);

                // offset: var; size: 2; index to last column
                $colLast = self::_GetInt2d($recordData, $length - 2);
                $columns = $colLast - $colFirst + 1;

                // offset within record data
                $offset = 4;

                for ($i = 0; $i < $columns; ++$i) {
                        $columnString = PHPExcel_Cell::stringFromColumnIndex($colFirst + $i);

                        // Read cell?
                        if (($this->getReadFilter() !== NULL) && $this->getReadFilter()->readCell($columnString, $row + 1, $this->_phpSheet->getTitle()) ) {

                                // offset: var; size: 2; index to XF record
                                $xfIndex = self::_GetInt2d($recordData, $offset);

                                // offset: var; size: 4; RK value
                                $numValue = self::_GetIEEE754(self::_GetInt4d($recordData, $offset + 2));
                                $cell = $this->_phpSheet->getCell($columnString . ($row + 1));
                                if (!$this->_readDataOnly) {
                                        // add style
                                        $cell->setXfIndex($this->_mapCellXfIndex[$xfIndex]);
                                }

                                // add cell value
                                $cell->setValueExplicit($numValue, PHPExcel_Cell_DataType::TYPE_NUMERIC);
                        }

                        $offset += 6;
                }
        }


        private function _readNumber()
        {
                $length = self::_GetInt2d($this->_data, $this->_pos + 2);
                $recordData = $this->_readRecordData($this->_data, $this->_pos + 4, $length);

                // move stream pointer to next record
                $this->_pos += 4 + $length;

                // offset: 0; size: 2; index to row
                $row = self::_GetInt2d($recordData, 0);

                // offset: 2; size 2; index to column
                $column = self::_GetInt2d($recordData, 2);
                $columnString = PHPExcel_Cell::stringFromColumnIndex($column);

                // Read cell?
                if (($this->getReadFilter() !== NULL) && $this->getReadFilter()->readCell($columnString, $row + 1, $this->_phpSheet->getTitle()) ) {
                        // offset 4; size: 2; index to XF record
                        $xfIndex = self::_GetInt2d($recordData, 4);

                        $numValue = self::_extractNumber(substr($recordData, 6, 8));

                        $cell = $this->_phpSheet->getCell($columnString . ($row + 1));
                        if (!$this->_readDataOnly) {
                                // add cell style
                                $cell->setXfIndex($this->_mapCellXfIndex[$xfIndex]);
                        }

                        // add cell value
                        $cell->setValueExplicit($numValue, PHPExcel_Cell_DataType::TYPE_NUMERIC);
                }
        }


        private function _readFormula()
        {
                $length = self::_GetInt2d($this->_data, $this->_pos + 2);
                $recordData = $this->_readRecordData($this->_data, $this->_pos + 4, $length);

                // move stream pointer to next record
                $this->_pos += 4 + $length;

                // offset: 0; size: 2; row index
                $row = self::_GetInt2d($recordData, 0);

                // offset: 2; size: 2; col index
                $column = self::_GetInt2d($recordData, 2);
                $columnString = PHPExcel_Cell::stringFromColumnIndex($column);

                // offset: 20: size: variable; formula structure
                $formulaStructure = substr($recordData, 20);

                // offset: 14: size: 2; option flags, recalculate always, recalculate on open etc.
                $options = self::_GetInt2d($recordData, 14);

                // bit: 0; mask: 0x0001; 1 = recalculate always
                // bit: 1; mask: 0x0002; 1 = calculate on open
                // bit: 2; mask: 0x0008; 1 = part of a shared formula
                $isPartOfSharedFormula = (bool) (0x0008 & $options);

                // WARNING:
                // We can apparently not rely on $isPartOfSharedFormula. Even when $isPartOfSharedFormula = true
                // the formula data may be ordinary formula data, therefore we need to check
                // explicitly for the tExp token (0x01)
                $isPartOfSharedFormula = $isPartOfSharedFormula && ord($formulaStructure{2}) == 0x01;

                if ($isPartOfSharedFormula) {
                        // part of shared formula which means there will be a formula with a tExp token and nothing else
                        // get the base cell, grab tExp token
                        $baseRow = self::_GetInt2d($formulaStructure, 3);
                        $baseCol = self::_GetInt2d($formulaStructure, 5);
                        $this->_baseCell = PHPExcel_Cell::stringFromColumnIndex($baseCol). ($baseRow + 1);
                }

                // Read cell?
                if (($this->getReadFilter() !== NULL) && $this->getReadFilter()->readCell($columnString, $row + 1, $this->_phpSheet->getTitle()) ) {

                        if ($isPartOfSharedFormula) {
                                // formula is added to this cell after the sheet has been read
                                $this->_sharedFormulaParts[$columnString . ($row + 1)] = $this->_baseCell;
                        }

                        // offset: 16: size: 4; not used

                        // offset: 4; size: 2; XF index
                        $xfIndex = self::_GetInt2d($recordData, 4);

                        // offset: 6; size: 8; result of the formula
                        if ( (ord($recordData{6}) == 0)
                                && (ord($recordData{12}) == 255)
                                && (ord($recordData{13}) == 255) ) {

                                // String formula. Result follows in appended STRING record
                                $dataType = PHPExcel_Cell_DataType::TYPE_STRING;

                                // read possible SHAREDFMLA record
                                $code = self::_GetInt2d($this->_data, $this->_pos);
                                if ($code == self::XLS_Type_SHAREDFMLA) {
                                        $this->_readSharedFmla();
                                }

                                // read STRING record
                                $value = $this->_readString();

                        } elseif ((ord($recordData{6}) == 1)
                                && (ord($recordData{12}) == 255)
                                && (ord($recordData{13}) == 255)) {

                                // Boolean formula. Result is in +2; 0=false, 1=true
                                $dataType = PHPExcel_Cell_DataType::TYPE_BOOL;
                                $value = (bool) ord($recordData{8});

                        } elseif ((ord($recordData{6}) == 2)
                                && (ord($recordData{12}) == 255)
                                && (ord($recordData{13}) == 255)) {

                                // Error formula. Error code is in +2
                                $dataType = PHPExcel_Cell_DataType::TYPE_ERROR;
                                $value = self::_mapErrorCode(ord($recordData{8}));

                        } elseif ((ord($recordData{6}) == 3)
                                && (ord($recordData{12}) == 255)
                                && (ord($recordData{13}) == 255)) {

                                // Formula result is a null string
                                $dataType = PHPExcel_Cell_DataType::TYPE_NULL;
                                $value = '';

                        } else {

                                // forumla result is a number, first 14 bytes like _NUMBER record
                                $dataType = PHPExcel_Cell_DataType::TYPE_NUMERIC;
                                $value = self::_extractNumber(substr($recordData, 6, 8));

                        }

                        $cell = $this->_phpSheet->getCell($columnString . ($row + 1));
                        if (!$this->_readDataOnly) {
                                // add cell style
                                $cell->setXfIndex($this->_mapCellXfIndex[$xfIndex]);
                        }

                        // store the formula
                        if (!$isPartOfSharedFormula) {
                                // not part of shared formula
                                // add cell value. If we can read formula, populate with formula, otherwise just used cached value
                                try {
                                        if ($this->_version != self::XLS_BIFF8) {
                                                throw new PHPExcel_Reader_Exception('Not BIFF8. Can only read BIFF8 formulas');
                                        }
                                        $formula = $this->_getFormulaFromStructure($formulaStructure); // get formula in human language
                                        $cell->setValueExplicit('=' . $formula, PHPExcel_Cell_DataType::TYPE_FORMULA);

                                } catch (PHPExcel_Exception $e) {
                                        $cell->setValueExplicit($value, $dataType);
                                }
                        } else {
                                if ($this->_version == self::XLS_BIFF8) {
                                        // do nothing at this point, formula id added later in the code
                                } else {
                                        $cell->setValueExplicit($value, $dataType);
                                }
                        }

                        // store the cached calculated value
                        $cell->setCalculatedValue($value);
                }
        }


        private function _readSharedFmla()
        {
                $length = self::_GetInt2d($this->_data, $this->_pos + 2);
                $recordData = $this->_readRecordData($this->_data, $this->_pos + 4, $length);

                // move stream pointer to next record
                $this->_pos += 4 + $length;

                // offset: 0, size: 6; cell range address of the area used by the shared formula, not used for anything
                $cellRange = substr($recordData, 0, 6);
                $cellRange = $this->_readBIFF5CellRangeAddressFixed($cellRange); // note: even BIFF8 uses BIFF5 syntax

                // offset: 6, size: 1; not used

                // offset: 7, size: 1; number of existing FORMULA records for this shared formula
                $no = ord($recordData{7});

                // offset: 8, size: var; Binary token array of the shared formula
                $formula = substr($recordData, 8);

                // at this point we only store the shared formula for later use
                $this->_sharedFormulas[$this->_baseCell] = $formula;

        }


        private function _readString()
        {
                $length = self::_GetInt2d($this->_data, $this->_pos + 2);
                $recordData = $this->_readRecordData($this->_data, $this->_pos + 4, $length);

                // move stream pointer to next record
                $this->_pos += 4 + $length;

                if ($this->_version == self::XLS_BIFF8) {
                        $string = self::_readUnicodeStringLong($recordData);
                        $value = $string['value'];
                } else {
                        $string = $this->_readByteStringLong($recordData);
                        $value = $string['value'];
                }

                return $value;
        }


        private function _readBoolErr()
        {
                $length = self::_GetInt2d($this->_data, $this->_pos + 2);
                $recordData = $this->_readRecordData($this->_data, $this->_pos + 4, $length);

                // move stream pointer to next record
                $this->_pos += 4 + $length;

                // offset: 0; size: 2; row index
                $row = self::_GetInt2d($recordData, 0);

                // offset: 2; size: 2; column index
                $column = self::_GetInt2d($recordData, 2);
                $columnString = PHPExcel_Cell::stringFromColumnIndex($column);

                // Read cell?
                if (($this->getReadFilter() !== NULL) && $this->getReadFilter()->readCell($columnString, $row + 1, $this->_phpSheet->getTitle()) ) {
                        // offset: 4; size: 2; index to XF record
                        $xfIndex = self::_GetInt2d($recordData, 4);

                        // offset: 6; size: 1; the boolean value or error value
                        $boolErr = ord($recordData{6});

                        // offset: 7; size: 1; 0=boolean; 1=error
                        $isError = ord($recordData{7});

                        $cell = $this->_phpSheet->getCell($columnString . ($row + 1));
                        switch ($isError) {
                                case 0: // boolean
                                        $value = (bool) $boolErr;

                                        // add cell value
                                        $cell->setValueExplicit($value, PHPExcel_Cell_DataType::TYPE_BOOL);
                                        break;

                                case 1: // error type
                                        $value = self::_mapErrorCode($boolErr);

                                        // add cell value
                                        $cell->setValueExplicit($value, PHPExcel_Cell_DataType::TYPE_ERROR);
                                        break;
                        }

                        if (!$this->_readDataOnly) {
                                // add cell style
                                $cell->setXfIndex($this->_mapCellXfIndex[$xfIndex]);
                        }
                }
        }


        private function _readMulBlank()
        {
                $length = self::_GetInt2d($this->_data, $this->_pos + 2);
                $recordData = $this->_readRecordData($this->_data, $this->_pos + 4, $length);

                // move stream pointer to next record
                $this->_pos += 4 + $length;

                // offset: 0; size: 2; index to row
                $row = self::_GetInt2d($recordData, 0);

                // offset: 2; size: 2; index to first column
                $fc = self::_GetInt2d($recordData, 2);

                // offset: 4; size: 2 x nc; list of indexes to XF records
                // add style information
                if (!$this->_readDataOnly) {
                        for ($i = 0; $i < $length / 2 - 3; ++$i) {
                                $columnString = PHPExcel_Cell::stringFromColumnIndex($fc + $i);

                                // Read cell?
                                if (($this->getReadFilter() !== NULL) && $this->getReadFilter()->readCell($columnString, $row + 1, $this->_phpSheet->getTitle()) ) {
                                        $xfIndex = self::_GetInt2d($recordData, 4 + 2 * $i);
                                        $this->_phpSheet->getCell($columnString . ($row + 1))->setXfIndex($this->_mapCellXfIndex[$xfIndex]);
                                }
                        }
                }

                // offset: 6; size 2; index to last column (not needed)
        }


        private function _readLabel()
        {
                $length = self::_GetInt2d($this->_data, $this->_pos + 2);
                $recordData = $this->_readRecordData($this->_data, $this->_pos + 4, $length);

                // move stream pointer to next record
                $this->_pos += 4 + $length;

                // offset: 0; size: 2; index to row
                $row = self::_GetInt2d($recordData, 0);

                // offset: 2; size: 2; index to column
                $column = self::_GetInt2d($recordData, 2);
                $columnString = PHPExcel_Cell::stringFromColumnIndex($column);

                // Read cell?
                if (($this->getReadFilter() !== NULL) && $this->getReadFilter()->readCell($columnString, $row + 1, $this->_phpSheet->getTitle()) ) {
                        // offset: 4; size: 2; XF index
                        $xfIndex = self::_GetInt2d($recordData, 4);

                        // add cell value
                        // todo: what if string is very long? continue record
                        if ($this->_version == self::XLS_BIFF8) {
                                $string = self::_readUnicodeStringLong(substr($recordData, 6));
                                $value = $string['value'];
                        } else {
                                $string = $this->_readByteStringLong(substr($recordData, 6));
                                $value = $string['value'];
                        }
                        $cell = $this->_phpSheet->getCell($columnString . ($row + 1));
                        $cell->setValueExplicit($value, PHPExcel_Cell_DataType::TYPE_STRING);

                        if (!$this->_readDataOnly) {
                                // add cell style
                                $cell->setXfIndex($this->_mapCellXfIndex[$xfIndex]);
                        }
                }
        }


        private function _readBlank()
        {
                $length = self::_GetInt2d($this->_data, $this->_pos + 2);
                $recordData = $this->_readRecordData($this->_data, $this->_pos + 4, $length);

                // move stream pointer to next record
                $this->_pos += 4 + $length;

                // offset: 0; size: 2; row index
                $row = self::_GetInt2d($recordData, 0);

                // offset: 2; size: 2; col index
                $col = self::_GetInt2d($recordData, 2);
                $columnString = PHPExcel_Cell::stringFromColumnIndex($col);

                // Read cell?
                if (($this->getReadFilter() !== NULL) && $this->getReadFilter()->readCell($columnString, $row + 1, $this->_phpSheet->getTitle()) ) {
                        // offset: 4; size: 2; XF index
                        $xfIndex = self::_GetInt2d($recordData, 4);

                        // add style information
                        if (!$this->_readDataOnly) {
                                $this->_phpSheet->getCell($columnString . ($row + 1))->setXfIndex($this->_mapCellXfIndex[$xfIndex]);
                        }
                }

        }


        private function _readMsoDrawing()
        {
                $length = self::_GetInt2d($this->_data, $this->_pos + 2);

                // get spliced record data
                $splicedRecordData = $this->_getSplicedRecordData();
                $recordData = $splicedRecordData['recordData'];

                $this->_drawingData .= $recordData;
        }


        private function _readObj()
        {
                $length = self::_GetInt2d($this->_data, $this->_pos + 2);
                $recordData = $this->_readRecordData($this->_data, $this->_pos + 4, $length);

                // move stream pointer to next record
                $this->_pos += 4 + $length;

                if ($this->_readDataOnly || $this->_version != self::XLS_BIFF8) {
                        return;
                }

                // recordData consists of an array of subrecords looking like this:
                //      ft: 2 bytes; ftCmo type (0x15)
                //      cb: 2 bytes; size in bytes of ftCmo data
                //      ot: 2 bytes; Object Type
                //      id: 2 bytes; Object id number
                //      grbit: 2 bytes; Option Flags
                //      data: var; subrecord data

                // for now, we are just interested in the second subrecord containing the object type
                $ftCmoType      = self::_GetInt2d($recordData, 0);
                $cbCmoSize      = self::_GetInt2d($recordData, 2);
                $otObjType      = self::_GetInt2d($recordData, 4);
                $idObjID        = self::_GetInt2d($recordData, 6);
                $grbitOpts      = self::_GetInt2d($recordData, 6);

                $this->_objs[] = array(
                        'ftCmoType'     => $ftCmoType,
                        'cbCmoSize'     => $cbCmoSize,
                        'otObjType'     => $otObjType,
                        'idObjID'       => $idObjID,
                        'grbitOpts'     => $grbitOpts
                );
                $this->textObjRef = $idObjID;

//              echo '<b>_readObj()</b><br />';
//              var_dump(end($this->_objs));
//              echo '<br />';
        }


        private function _readWindow2()
        {
                $length = self::_GetInt2d($this->_data, $this->_pos + 2);
                $recordData = $this->_readRecordData($this->_data, $this->_pos + 4, $length);

                // move stream pointer to next record
                $this->_pos += 4 + $length;

                // offset: 0; size: 2; option flags
                $options = self::_GetInt2d($recordData, 0);

                // offset: 2; size: 2; index to first visible row
                $firstVisibleRow = self::_GetInt2d($recordData, 2);

                // offset: 4; size: 2; index to first visible colum
                $firstVisibleColumn = self::_GetInt2d($recordData, 4);
                if ($this->_version === self::XLS_BIFF8) {
                        // offset:  8; size: 2; not used
                        // offset: 10; size: 2; cached magnification factor in page break preview (in percent); 0 = Default (60%)
                        // offset: 12; size: 2; cached magnification factor in normal view (in percent); 0 = Default (100%)
                        // offset: 14; size: 4; not used
                        $zoomscaleInPageBreakPreview = self::_GetInt2d($recordData, 10);
                        if ($zoomscaleInPageBreakPreview === 0) $zoomscaleInPageBreakPreview = 60;
                        $zoomscaleInNormalView = self::_GetInt2d($recordData, 12);
                        if ($zoomscaleInNormalView === 0) $zoomscaleInNormalView = 100;
                }

                // bit: 1; mask: 0x0002; 0 = do not show gridlines, 1 = show gridlines
                $showGridlines = (bool) ((0x0002 & $options) >> 1);
                $this->_phpSheet->setShowGridlines($showGridlines);

                // bit: 2; mask: 0x0004; 0 = do not show headers, 1 = show headers
                $showRowColHeaders = (bool) ((0x0004 & $options) >> 2);
                $this->_phpSheet->setShowRowColHeaders($showRowColHeaders);

                // bit: 3; mask: 0x0008; 0 = panes are not frozen, 1 = panes are frozen
                $this->_frozen = (bool) ((0x0008 & $options) >> 3);

                // bit: 6; mask: 0x0040; 0 = columns from left to right, 1 = columns from right to left
                $this->_phpSheet->setRightToLeft((bool)((0x0040 & $options) >> 6));

                // bit: 10; mask: 0x0400; 0 = sheet not active, 1 = sheet active
                $isActive = (bool) ((0x0400 & $options) >> 10);
                if ($isActive) {
                        $this->_phpExcel->setActiveSheetIndex($this->_phpExcel->getIndex($this->_phpSheet));
                }

                // bit: 11; mask: 0x0800; 0 = normal view, 1 = page break view
                $isPageBreakPreview = (bool) ((0x0800 & $options) >> 11);

                //FIXME: set $firstVisibleRow and $firstVisibleColumn

                if ($this->_phpSheet->getSheetView()->getView() !== PHPExcel_Worksheet_SheetView::SHEETVIEW_PAGE_LAYOUT) {
                        //NOTE: this setting is inferior to page layout view(Excel2007-)
                        $view = $isPageBreakPreview? PHPExcel_Worksheet_SheetView::SHEETVIEW_PAGE_BREAK_PREVIEW :
                                PHPExcel_Worksheet_SheetView::SHEETVIEW_NORMAL;
                        $this->_phpSheet->getSheetView()->setView($view);
                        if ($this->_version === self::XLS_BIFF8) {
                                $zoomScale = $isPageBreakPreview? $zoomscaleInPageBreakPreview : $zoomscaleInNormalView;
                                $this->_phpSheet->getSheetView()->setZoomScale($zoomScale);
                                $this->_phpSheet->getSheetView()->setZoomScaleNormal($zoomscaleInNormalView);
                        }
                }
        }

        private function _readPageLayoutView(){
                $length = self::_GetInt2d($this->_data, $this->_pos + 2);
                $recordData = $this->_readRecordData($this->_data, $this->_pos + 4, $length);

                // move stream pointer to next record
                $this->_pos += 4 + $length;

                //var_dump(unpack("vrt/vgrbitFrt/V2reserved/vwScalePLV/vgrbit", $recordData));

                // offset: 0; size: 2; rt
                //->ignore
                $rt = self::_GetInt2d($recordData, 0);
                // offset: 2; size: 2; grbitfr
                //->ignore
                $grbitFrt = self::_GetInt2d($recordData, 2);
                // offset: 4; size: 8; reserved
                //->ignore

                // offset: 12; size 2; zoom scale
                $wScalePLV = self::_GetInt2d($recordData, 12);
                // offset: 14; size 2; grbit
                $grbit = self::_GetInt2d($recordData, 14);

                // decomprise grbit
                $fPageLayoutView   = $grbit & 0x01;
                $fRulerVisible     = ($grbit >> 1) & 0x01; //no support
                $fWhitespaceHidden = ($grbit >> 3) & 0x01; //no support

                if ($fPageLayoutView === 1) {
                        $this->_phpSheet->getSheetView()->setView(PHPExcel_Worksheet_SheetView::SHEETVIEW_PAGE_LAYOUT);
                        $this->_phpSheet->getSheetView()->setZoomScale($wScalePLV); //set by Excel2007 only if SHEETVIEW_PAGE_LAYOUT
                }
                //otherwise, we cannot know whether SHEETVIEW_PAGE_LAYOUT or SHEETVIEW_PAGE_BREAK_PREVIEW.
        }

        private function _readScl()
        {
                $length = self::_GetInt2d($this->_data, $this->_pos + 2);
                $recordData = $this->_readRecordData($this->_data, $this->_pos + 4, $length);

                // move stream pointer to next record
                $this->_pos += 4 + $length;

                // offset: 0; size: 2; numerator of the view magnification
                $numerator = self::_GetInt2d($recordData, 0);

                // offset: 2; size: 2; numerator of the view magnification
                $denumerator = self::_GetInt2d($recordData, 2);

                // set the zoom scale (in percent)
                $this->_phpSheet->getSheetView()->setZoomScale($numerator * 100 / $denumerator);
        }


        private function _readPane()
        {
                $length = self::_GetInt2d($this->_data, $this->_pos + 2);
                $recordData = $this->_readRecordData($this->_data, $this->_pos + 4, $length);

                // move stream pointer to next record
                $this->_pos += 4 + $length;

                if (!$this->_readDataOnly) {
                        // offset: 0; size: 2; position of vertical split
                        $px = self::_GetInt2d($recordData, 0);

                        // offset: 2; size: 2; position of horizontal split
                        $py = self::_GetInt2d($recordData, 2);

                        if ($this->_frozen) {
                                // frozen panes
                                $this->_phpSheet->freezePane(PHPExcel_Cell::stringFromColumnIndex($px) . ($py + 1));
                        } else {
                                // unfrozen panes; split windows; not supported by PHPExcel core
                        }
                }
        }


        private function _readSelection()
        {
                $length = self::_GetInt2d($this->_data, $this->_pos + 2);
                $recordData = $this->_readRecordData($this->_data, $this->_pos + 4, $length);

                // move stream pointer to next record
                $this->_pos += 4 + $length;

                if (!$this->_readDataOnly) {
                        // offset: 0; size: 1; pane identifier
                        $paneId = ord($recordData{0});

                        // offset: 1; size: 2; index to row of the active cell
                        $r = self::_GetInt2d($recordData, 1);

                        // offset: 3; size: 2; index to column of the active cell
                        $c = self::_GetInt2d($recordData, 3);

                        // offset: 5; size: 2; index into the following cell range list to the
                        //  entry that contains the active cell
                        $index = self::_GetInt2d($recordData, 5);

                        // offset: 7; size: var; cell range address list containing all selected cell ranges
                        $data = substr($recordData, 7);
                        $cellRangeAddressList = $this->_readBIFF5CellRangeAddressList($data); // note: also BIFF8 uses BIFF5 syntax

                        $selectedCells = $cellRangeAddressList['cellRangeAddresses'][0];

                        // first row '1' + last row '16384' indicates that full column is selected (apparently also in BIFF8!)
                        if (preg_match('/^([A-Z]+1\:[A-Z]+)16384$/', $selectedCells)) {
                                $selectedCells = preg_replace('/^([A-Z]+1\:[A-Z]+)16384$/', '${1}1048576', $selectedCells);
                        }

                        // first row '1' + last row '65536' indicates that full column is selected
                        if (preg_match('/^([A-Z]+1\:[A-Z]+)65536$/', $selectedCells)) {
                                $selectedCells = preg_replace('/^([A-Z]+1\:[A-Z]+)65536$/', '${1}1048576', $selectedCells);
                        }

                        // first column 'A' + last column 'IV' indicates that full row is selected
                        if (preg_match('/^(A[0-9]+\:)IV([0-9]+)$/', $selectedCells)) {
                                $selectedCells = preg_replace('/^(A[0-9]+\:)IV([0-9]+)$/', '${1}XFD${2}', $selectedCells);
                        }

                        $this->_phpSheet->setSelectedCells($selectedCells);
                }
        }


        private function _includeCellRangeFiltered($cellRangeAddress)
        {
                $includeCellRange = true;
                if ($this->getReadFilter() !== NULL) {
                        $includeCellRange = false;
                        $rangeBoundaries = PHPExcel_Cell::getRangeBoundaries($cellRangeAddress);
                        $rangeBoundaries[1][0]++;
                        for ($row = $rangeBoundaries[0][1]; $row <= $rangeBoundaries[1][1]; $row++) {
                                for ($column = $rangeBoundaries[0][0]; $column != $rangeBoundaries[1][0]; $column++) {
                                        if ($this->getReadFilter()->readCell($column, $row, $this->_phpSheet->getTitle())) {
                                                $includeCellRange = true;
                                                break 2;
                                        }
                                }
                        }
                }
                return $includeCellRange;
        }


        private function _readMergedCells()
        {
                $length = self::_GetInt2d($this->_data, $this->_pos + 2);
                $recordData = $this->_readRecordData($this->_data, $this->_pos + 4, $length);

                // move stream pointer to next record
                $this->_pos += 4 + $length;

                if ($this->_version == self::XLS_BIFF8 && !$this->_readDataOnly) {
                        $cellRangeAddressList = $this->_readBIFF8CellRangeAddressList($recordData);
                        foreach ($cellRangeAddressList['cellRangeAddresses'] as $cellRangeAddress) {
                                if ((strpos($cellRangeAddress,':') !== FALSE) &&
                                        ($this->_includeCellRangeFiltered($cellRangeAddress))) {
                                        $this->_phpSheet->mergeCells($cellRangeAddress);
                                }
                        }
                }
        }


        private function _readHyperLink()
        {
                $length = self::_GetInt2d($this->_data, $this->_pos + 2);
                $recordData = $this->_readRecordData($this->_data, $this->_pos + 4, $length);

                // move stream pointer forward to next record
                $this->_pos += 4 + $length;

                if (!$this->_readDataOnly) {
                        // offset: 0; size: 8; cell range address of all cells containing this hyperlink
                        try {
                                $cellRange = $this->_readBIFF8CellRangeAddressFixed($recordData, 0, 8);
                        } catch (PHPExcel_Exception $e) {
                                return;
                        }

                        // offset: 8, size: 16; GUID of StdLink

                        // offset: 24, size: 4; unknown value

                        // offset: 28, size: 4; option flags

                                // bit: 0; mask: 0x00000001; 0 = no link or extant, 1 = file link or URL
                                $isFileLinkOrUrl = (0x00000001 & self::_GetInt2d($recordData, 28)) >> 0;

                                // bit: 1; mask: 0x00000002; 0 = relative path, 1 = absolute path or URL
                                $isAbsPathOrUrl = (0x00000001 & self::_GetInt2d($recordData, 28)) >> 1;

                                // bit: 2 (and 4); mask: 0x00000014; 0 = no description
                                $hasDesc = (0x00000014 & self::_GetInt2d($recordData, 28)) >> 2;

                                // bit: 3; mask: 0x00000008; 0 = no text, 1 = has text
                                $hasText = (0x00000008 & self::_GetInt2d($recordData, 28)) >> 3;

                                // bit: 7; mask: 0x00000080; 0 = no target frame, 1 = has target frame
                                $hasFrame = (0x00000080 & self::_GetInt2d($recordData, 28)) >> 7;

                                // bit: 8; mask: 0x00000100; 0 = file link or URL, 1 = UNC path (inc. server name)
                                $isUNC = (0x00000100 & self::_GetInt2d($recordData, 28)) >> 8;

                        // offset within record data
                        $offset = 32;

                        if ($hasDesc) {
                                // offset: 32; size: var; character count of description text
                                $dl = self::_GetInt4d($recordData, 32);
                                // offset: 36; size: var; character array of description text, no Unicode string header, always 16-bit characters, zero terminated
                                $desc = self::_encodeUTF16(substr($recordData, 36, 2 * ($dl - 1)), false);
                                $offset += 4 + 2 * $dl;
                        }
                        if ($hasFrame) {
                                $fl = self::_GetInt4d($recordData, $offset);
                                $offset += 4 + 2 * $fl;
                        }

                        // detect type of hyperlink (there are 4 types)
                        $hyperlinkType = null;

                        if ($isUNC) {
                                $hyperlinkType = 'UNC';
                        } else if (!$isFileLinkOrUrl) {
                                $hyperlinkType = 'workbook';
                        } else if (ord($recordData{$offset}) == 0x03) {
                                $hyperlinkType = 'local';
                        } else if (ord($recordData{$offset}) == 0xE0) {
                                $hyperlinkType = 'URL';
                        }

                        switch ($hyperlinkType) {
                        case 'URL':
                                // section 5.58.2: Hyperlink containing a URL
                                // e.g. http://example.org/index.php

                                // offset: var; size: 16; GUID of URL Moniker
                                $offset += 16;
                                // offset: var; size: 4; size (in bytes) of character array of the URL including trailing zero word
                                $us = self::_GetInt4d($recordData, $offset);
                                $offset += 4;
                                // offset: var; size: $us; character array of the URL, no Unicode string header, always 16-bit characters, zero-terminated
                                $url = self::_encodeUTF16(substr($recordData, $offset, $us - 2), false);
                $nullOffset = strpos($url, 0x00);
                                if ($nullOffset)
                    $url = substr($url,0,$nullOffset);
                                $url .= $hasText ? '#' : '';
                                $offset += $us;
                                break;

                        case 'local':
                                // section 5.58.3: Hyperlink to local file
                                // examples:
                                //   mydoc.txt
                                //   ../../somedoc.xls#Sheet!A1

                                // offset: var; size: 16; GUI of File Moniker
                                $offset += 16;

                                // offset: var; size: 2; directory up-level count.
                                $upLevelCount = self::_GetInt2d($recordData, $offset);
                                $offset += 2;

                                // offset: var; size: 4; character count of the shortened file path and name, including trailing zero word
                                $sl = self::_GetInt4d($recordData, $offset);
                                $offset += 4;

                                // offset: var; size: sl; character array of the shortened file path and name in 8.3-DOS-format (compressed Unicode string)
                                $shortenedFilePath = substr($recordData, $offset, $sl);
                                $shortenedFilePath = self::_encodeUTF16($shortenedFilePath, true);
                                $shortenedFilePath = substr($shortenedFilePath, 0, -1); // remove trailing zero

                                $offset += $sl;

                                // offset: var; size: 24; unknown sequence
                                $offset += 24;

                                // extended file path
                                // offset: var; size: 4; size of the following file link field including string lenth mark
                                $sz = self::_GetInt4d($recordData, $offset);
                                $offset += 4;

                                // only present if $sz > 0
                                if ($sz > 0) {
                                        // offset: var; size: 4; size of the character array of the extended file path and name
                                        $xl = self::_GetInt4d($recordData, $offset);
                                        $offset += 4;

                                        // offset: var; size 2; unknown
                                        $offset += 2;

                                        // offset: var; size $xl; character array of the extended file path and name.
                                        $extendedFilePath = substr($recordData, $offset, $xl);
                                        $extendedFilePath = self::_encodeUTF16($extendedFilePath, false);
                                        $offset += $xl;
                                }

                                // construct the path
                                $url = str_repeat('..\\', $upLevelCount);
                                $url .= ($sz > 0) ?
                                        $extendedFilePath : $shortenedFilePath; // use extended path if available
                                $url .= $hasText ? '#' : '';

                                break;


                        case 'UNC':
                                // section 5.58.4: Hyperlink to a File with UNC (Universal Naming Convention) Path
                                // todo: implement
                                return;

                        case 'workbook':
                                // section 5.58.5: Hyperlink to the Current Workbook
                                // e.g. Sheet2!B1:C2, stored in text mark field
                                $url = 'sheet://';
                                break;

                        default:
                                return;

                        }

                        if ($hasText) {
                                // offset: var; size: 4; character count of text mark including trailing zero word
                                $tl = self::_GetInt4d($recordData, $offset);
                                $offset += 4;
                                // offset: var; size: var; character array of the text mark without the # sign, no Unicode header, always 16-bit characters, zero-terminated
                                $text = self::_encodeUTF16(substr($recordData, $offset, 2 * ($tl - 1)), false);
                                $url .= $text;
                        }

                        // apply the hyperlink to all the relevant cells
                        foreach (PHPExcel_Cell::extractAllCellReferencesInRange($cellRange) as $coordinate) {
                                $this->_phpSheet->getCell($coordinate)->getHyperLink()->setUrl($url);
                        }
                }
        }


        private function _readDataValidations()
        {
                $length = self::_GetInt2d($this->_data, $this->_pos + 2);
                $recordData = $this->_readRecordData($this->_data, $this->_pos + 4, $length);

                // move stream pointer forward to next record
                $this->_pos += 4 + $length;
        }


        private function _readDataValidation()
        {
                $length = self::_GetInt2d($this->_data, $this->_pos + 2);
                $recordData = $this->_readRecordData($this->_data, $this->_pos + 4, $length);

                // move stream pointer forward to next record
                $this->_pos += 4 + $length;

                if ($this->_readDataOnly) {
                        return;
                }

                // offset: 0; size: 4; Options
                $options = self::_GetInt4d($recordData, 0);

                // bit: 0-3; mask: 0x0000000F; type
                $type = (0x0000000F & $options) >> 0;
                switch ($type) {
                        case 0x00:      $type = PHPExcel_Cell_DataValidation::TYPE_NONE;                break;
                        case 0x01:      $type = PHPExcel_Cell_DataValidation::TYPE_WHOLE;               break;
                        case 0x02:      $type = PHPExcel_Cell_DataValidation::TYPE_DECIMAL;             break;
                        case 0x03:      $type = PHPExcel_Cell_DataValidation::TYPE_LIST;                break;
                        case 0x04:      $type = PHPExcel_Cell_DataValidation::TYPE_DATE;                break;
                        case 0x05:      $type = PHPExcel_Cell_DataValidation::TYPE_TIME;                break;
                        case 0x06:      $type = PHPExcel_Cell_DataValidation::TYPE_TEXTLENGTH;  break;
                        case 0x07:      $type = PHPExcel_Cell_DataValidation::TYPE_CUSTOM;              break;
                }

                // bit: 4-6; mask: 0x00000070; error type
                $errorStyle = (0x00000070 & $options) >> 4;
                switch ($errorStyle) {
                        case 0x00:      $errorStyle = PHPExcel_Cell_DataValidation::STYLE_STOP;                 break;
                        case 0x01:      $errorStyle = PHPExcel_Cell_DataValidation::STYLE_WARNING;              break;
                        case 0x02:      $errorStyle = PHPExcel_Cell_DataValidation::STYLE_INFORMATION;  break;
                }

                // bit: 7; mask: 0x00000080; 1= formula is explicit (only applies to list)
                // I have only seen cases where this is 1
                $explicitFormula = (0x00000080 & $options) >> 7;

                // bit: 8; mask: 0x00000100; 1= empty cells allowed
                $allowBlank = (0x00000100 & $options) >> 8;

                // bit: 9; mask: 0x00000200; 1= suppress drop down arrow in list type validity
                $suppressDropDown = (0x00000200 & $options) >> 9;

                // bit: 18; mask: 0x00040000; 1= show prompt box if cell selected
                $showInputMessage = (0x00040000 & $options) >> 18;

                // bit: 19; mask: 0x00080000; 1= show error box if invalid values entered
                $showErrorMessage = (0x00080000 & $options) >> 19;

                // bit: 20-23; mask: 0x00F00000; condition operator
                $operator = (0x00F00000 & $options) >> 20;
                switch ($operator) {
                        case 0x00: $operator = PHPExcel_Cell_DataValidation::OPERATOR_BETWEEN                   ;       break;
                        case 0x01: $operator = PHPExcel_Cell_DataValidation::OPERATOR_NOTBETWEEN                ;       break;
                        case 0x02: $operator = PHPExcel_Cell_DataValidation::OPERATOR_EQUAL                             ;       break;
                        case 0x03: $operator = PHPExcel_Cell_DataValidation::OPERATOR_NOTEQUAL                  ;       break;
                        case 0x04: $operator = PHPExcel_Cell_DataValidation::OPERATOR_GREATERTHAN               ;       break;
                        case 0x05: $operator = PHPExcel_Cell_DataValidation::OPERATOR_LESSTHAN                  ;       break;
                        case 0x06: $operator = PHPExcel_Cell_DataValidation::OPERATOR_GREATERTHANOREQUAL;       break;
                        case 0x07: $operator = PHPExcel_Cell_DataValidation::OPERATOR_LESSTHANOREQUAL   ;       break;
                }

                // offset: 4; size: var; title of the prompt box
                $offset = 4;
                $string = self::_readUnicodeStringLong(substr($recordData, $offset));
                $promptTitle = $string['value'] !== chr(0) ?
                        $string['value'] : '';
                $offset += $string['size'];

                // offset: var; size: var; title of the error box
                $string = self::_readUnicodeStringLong(substr($recordData, $offset));
                $errorTitle = $string['value'] !== chr(0) ?
                        $string['value'] : '';
                $offset += $string['size'];

                // offset: var; size: var; text of the prompt box
                $string = self::_readUnicodeStringLong(substr($recordData, $offset));
                $prompt = $string['value'] !== chr(0) ?
                        $string['value'] : '';
                $offset += $string['size'];

                // offset: var; size: var; text of the error box
                $string = self::_readUnicodeStringLong(substr($recordData, $offset));
                $error = $string['value'] !== chr(0) ?
                        $string['value'] : '';
                $offset += $string['size'];

                // offset: var; size: 2; size of the formula data for the first condition
                $sz1 = self::_GetInt2d($recordData, $offset);
                $offset += 2;

                // offset: var; size: 2; not used
                $offset += 2;

                // offset: var; size: $sz1; formula data for first condition (without size field)
                $formula1 = substr($recordData, $offset, $sz1);
                $formula1 = pack('v', $sz1) . $formula1; // prepend the length
                try {
                        $formula1 = $this->_getFormulaFromStructure($formula1);

                        // in list type validity, null characters are used as item separators
                        if ($type == PHPExcel_Cell_DataValidation::TYPE_LIST) {
                                $formula1 = str_replace(chr(0), ',', $formula1);
                        }
                } catch (PHPExcel_Exception $e) {
                        return;
                }
                $offset += $sz1;

                // offset: var; size: 2; size of the formula data for the first condition
                $sz2 = self::_GetInt2d($recordData, $offset);
                $offset += 2;

                // offset: var; size: 2; not used
                $offset += 2;

                // offset: var; size: $sz2; formula data for second condition (without size field)
                $formula2 = substr($recordData, $offset, $sz2);
                $formula2 = pack('v', $sz2) . $formula2; // prepend the length
                try {
                        $formula2 = $this->_getFormulaFromStructure($formula2);
                } catch (PHPExcel_Exception $e) {
                        return;
                }
                $offset += $sz2;

                // offset: var; size: var; cell range address list with
                $cellRangeAddressList = $this->_readBIFF8CellRangeAddressList(substr($recordData, $offset));
                $cellRangeAddresses = $cellRangeAddressList['cellRangeAddresses'];

                foreach ($cellRangeAddresses as $cellRange) {
                        $stRange = $this->_phpSheet->shrinkRangeToFit($cellRange);
                        $stRange = PHPExcel_Cell::extractAllCellReferencesInRange($stRange);
                        foreach ($stRange as $coordinate) {
                                $objValidation = $this->_phpSheet->getCell($coordinate)->getDataValidation();
                                $objValidation->setType($type);
                                $objValidation->setErrorStyle($errorStyle);
                                $objValidation->setAllowBlank((bool)$allowBlank);
                                $objValidation->setShowInputMessage((bool)$showInputMessage);
                                $objValidation->setShowErrorMessage((bool)$showErrorMessage);
                                $objValidation->setShowDropDown(!$suppressDropDown);
                                $objValidation->setOperator($operator);
                                $objValidation->setErrorTitle($errorTitle);
                                $objValidation->setError($error);
                                $objValidation->setPromptTitle($promptTitle);
                                $objValidation->setPrompt($prompt);
                                $objValidation->setFormula1($formula1);
                                $objValidation->setFormula2($formula2);
                        }
                }

        }


        private function _readSheetLayout()
        {
                $length = self::_GetInt2d($this->_data, $this->_pos + 2);
                $recordData = $this->_readRecordData($this->_data, $this->_pos + 4, $length);

                // move stream pointer to next record
                $this->_pos += 4 + $length;

                // local pointer in record data
                $offset = 0;

                if (!$this->_readDataOnly) {
                        // offset: 0; size: 2; repeated record identifier 0x0862

                        // offset: 2; size: 10; not used

                        // offset: 12; size: 4; size of record data
                        // Excel 2003 uses size of 0x14 (documented), Excel 2007 uses size of 0x28 (not documented?)
                        $sz = self::_GetInt4d($recordData, 12);

                        switch ($sz) {
                                case 0x14:
                                        // offset: 16; size: 2; color index for sheet tab
                                        $colorIndex = self::_GetInt2d($recordData, 16);
                                        $color = self::_readColor($colorIndex,$this->_palette,$this->_version);
                                        $this->_phpSheet->getTabColor()->setRGB($color['rgb']);
                                        break;

                                case 0x28:
                                        // TODO: Investigate structure for .xls SHEETLAYOUT record as saved by MS Office Excel 2007
                                        return;
                                        break;
                        }
                }
        }


        private function _readSheetProtection()
        {
                $length = self::_GetInt2d($this->_data, $this->_pos + 2);
                $recordData = $this->_readRecordData($this->_data, $this->_pos + 4, $length);

                // move stream pointer to next record
                $this->_pos += 4 + $length;

                if ($this->_readDataOnly) {
                        return;
                }

                // offset: 0; size: 2; repeated record header

                // offset: 2; size: 2; FRT cell reference flag (=0 currently)

                // offset: 4; size: 8; Currently not used and set to 0

                // offset: 12; size: 2; Shared feature type index (2=Enhanced Protetion, 4=SmartTag)
                $isf = self::_GetInt2d($recordData, 12);
                if ($isf != 2) {
                        return;
                }

                // offset: 14; size: 1; =1 since this is a feat header

                // offset: 15; size: 4; size of rgbHdrSData

                // rgbHdrSData, assume "Enhanced Protection"
                // offset: 19; size: 2; option flags
                $options = self::_GetInt2d($recordData, 19);

                // bit: 0; mask 0x0001; 1 = user may edit objects, 0 = users must not edit objects
                $bool = (0x0001 & $options) >> 0;
                $this->_phpSheet->getProtection()->setObjects(!$bool);

                // bit: 1; mask 0x0002; edit scenarios
                $bool = (0x0002 & $options) >> 1;
                $this->_phpSheet->getProtection()->setScenarios(!$bool);

                // bit: 2; mask 0x0004; format cells
                $bool = (0x0004 & $options) >> 2;
                $this->_phpSheet->getProtection()->setFormatCells(!$bool);

                // bit: 3; mask 0x0008; format columns
                $bool = (0x0008 & $options) >> 3;
                $this->_phpSheet->getProtection()->setFormatColumns(!$bool);

                // bit: 4; mask 0x0010; format rows
                $bool = (0x0010 & $options) >> 4;
                $this->_phpSheet->getProtection()->setFormatRows(!$bool);

                // bit: 5; mask 0x0020; insert columns
                $bool = (0x0020 & $options) >> 5;
                $this->_phpSheet->getProtection()->setInsertColumns(!$bool);

                // bit: 6; mask 0x0040; insert rows
                $bool = (0x0040 & $options) >> 6;
                $this->_phpSheet->getProtection()->setInsertRows(!$bool);

                // bit: 7; mask 0x0080; insert hyperlinks
                $bool = (0x0080 & $options) >> 7;
                $this->_phpSheet->getProtection()->setInsertHyperlinks(!$bool);

                // bit: 8; mask 0x0100; delete columns
                $bool = (0x0100 & $options) >> 8;
                $this->_phpSheet->getProtection()->setDeleteColumns(!$bool);

                // bit: 9; mask 0x0200; delete rows
                $bool = (0x0200 & $options) >> 9;
                $this->_phpSheet->getProtection()->setDeleteRows(!$bool);

                // bit: 10; mask 0x0400; select locked cells
                $bool = (0x0400 & $options) >> 10;
                $this->_phpSheet->getProtection()->setSelectLockedCells(!$bool);

                // bit: 11; mask 0x0800; sort cell range
                $bool = (0x0800 & $options) >> 11;
                $this->_phpSheet->getProtection()->setSort(!$bool);

                // bit: 12; mask 0x1000; auto filter
                $bool = (0x1000 & $options) >> 12;
                $this->_phpSheet->getProtection()->setAutoFilter(!$bool);

                // bit: 13; mask 0x2000; pivot tables
                $bool = (0x2000 & $options) >> 13;
                $this->_phpSheet->getProtection()->setPivotTables(!$bool);

                // bit: 14; mask 0x4000; select unlocked cells
                $bool = (0x4000 & $options) >> 14;
                $this->_phpSheet->getProtection()->setSelectUnlockedCells(!$bool);

                // offset: 21; size: 2; not used
        }


        private function _readRangeProtection()
        {
                $length = self::_GetInt2d($this->_data, $this->_pos + 2);
                $recordData = $this->_readRecordData($this->_data, $this->_pos + 4, $length);

                // move stream pointer to next record
                $this->_pos += 4 + $length;

                // local pointer in record data
                $offset = 0;

                if (!$this->_readDataOnly) {
                        $offset += 12;

                        // offset: 12; size: 2; shared feature type, 2 = enhanced protection, 4 = smart tag
                        $isf = self::_GetInt2d($recordData, 12);
                        if ($isf != 2) {
                                // we only read FEAT records of type 2
                                return;
                        }
                        $offset += 2;

                        $offset += 5;

                        // offset: 19; size: 2; count of ref ranges this feature is on
                        $cref = self::_GetInt2d($recordData, 19);
                        $offset += 2;

                        $offset += 6;

                        // offset: 27; size: 8 * $cref; list of cell ranges (like in hyperlink record)
                        $cellRanges = array();
                        for ($i = 0; $i < $cref; ++$i) {
                                try {
                                        $cellRange = $this->_readBIFF8CellRangeAddressFixed(substr($recordData, 27 + 8 * $i, 8));
                                } catch (PHPExcel_Exception $e) {
                                        return;
                                }
                                $cellRanges[] = $cellRange;
                                $offset += 8;
                        }

                        // offset: var; size: var; variable length of feature specific data
                        $rgbFeat = substr($recordData, $offset);
                        $offset += 4;

                        // offset: var; size: 4; the encrypted password (only 16-bit although field is 32-bit)
                        $wPassword = self::_GetInt4d($recordData, $offset);
                        $offset += 4;

                        // Apply range protection to sheet
                        if ($cellRanges) {
                                $this->_phpSheet->protectCells(implode(' ', $cellRanges), strtoupper(dechex($wPassword)), true);
                        }
                }
        }


        private function _readImData()
        {
                $length = self::_GetInt2d($this->_data, $this->_pos + 2);

                // get spliced record data
                $splicedRecordData = $this->_getSplicedRecordData();
                $recordData = $splicedRecordData['recordData'];

                // UNDER CONSTRUCTION

                // offset: 0; size: 2; image format
                $cf = self::_GetInt2d($recordData, 0);

                // offset: 2; size: 2; environment from which the file was written
                $env = self::_GetInt2d($recordData, 2);

                // offset: 4; size: 4; length of the image data
                $lcb = self::_GetInt4d($recordData, 4);

                // offset: 8; size: var; image data
                $iData = substr($recordData, 8);

                switch ($cf) {
                case 0x09: // Windows bitmap format
                        // BITMAPCOREINFO
                        // 1. BITMAPCOREHEADER
                        // offset: 0; size: 4; bcSize, Specifies the number of bytes required by the structure
                        $bcSize = self::_GetInt4d($iData, 0);
//                      var_dump($bcSize);

                        // offset: 4; size: 2; bcWidth, specifies the width of the bitmap, in pixels
                        $bcWidth = self::_GetInt2d($iData, 4);
//                      var_dump($bcWidth);

                        // offset: 6; size: 2; bcHeight, specifies the height of the bitmap, in pixels.
                        $bcHeight = self::_GetInt2d($iData, 6);
//                      var_dump($bcHeight);
                        $ih = imagecreatetruecolor($bcWidth, $bcHeight);

                        // offset: 8; size: 2; bcPlanes, specifies the number of planes for the target device. This value must be 1

                        // offset: 10; size: 2; bcBitCount specifies the number of bits-per-pixel. This value must be 1, 4, 8, or 24
                        $bcBitCount = self::_GetInt2d($iData, 10);
//                      var_dump($bcBitCount);

                        $rgbString = substr($iData, 12);
                        $rgbTriples = array();
                        while (strlen($rgbString) > 0) {
                                $rgbTriples[] = unpack('Cb/Cg/Cr', $rgbString);
                                $rgbString = substr($rgbString, 3);
                        }
                        $x = 0;
                        $y = 0;
                        foreach ($rgbTriples as $i => $rgbTriple) {
                                $color = imagecolorallocate($ih, $rgbTriple['r'], $rgbTriple['g'], $rgbTriple['b']);
                                imagesetpixel($ih, $x, $bcHeight - 1 - $y, $color);
                                $x = ($x + 1) % $bcWidth;
                                $y = $y + floor(($x + 1) / $bcWidth);
                        }
                        //imagepng($ih, 'image.png');

                        $drawing = new PHPExcel_Worksheet_Drawing();
                        $drawing->setPath($filename);
                        $drawing->setWorksheet($this->_phpSheet);

                        break;

                case 0x02: // Windows metafile or Macintosh PICT format
                case 0x0e: // native format
                default;
                        break;

                }

                // _getSplicedRecordData() takes care of moving current position in data stream
        }


        private function _readContinue()
        {
                $length = self::_GetInt2d($this->_data, $this->_pos + 2);
                $recordData = $this->_readRecordData($this->_data, $this->_pos + 4, $length);

                // check if we are reading drawing data
                // this is in case a free CONTINUE record occurs in other circumstances we are unaware of
                if ($this->_drawingData == '') {
                        // move stream pointer to next record
                        $this->_pos += 4 + $length;

                        return;
                }

                // check if record data is at least 4 bytes long, otherwise there is no chance this is MSODRAWING data
                if ($length < 4) {
                        // move stream pointer to next record
                        $this->_pos += 4 + $length;

                        return;
                }

                // dirty check to see if CONTINUE record could be a camouflaged MSODRAWING record
                // look inside CONTINUE record to see if it looks like a part of an Escher stream
                // we know that Escher stream may be split at least at
                //              0xF003 MsofbtSpgrContainer
                //              0xF004 MsofbtSpContainer
                //              0xF00D MsofbtClientTextbox
                $validSplitPoints = array(0xF003, 0xF004, 0xF00D); // add identifiers if we find more

                $splitPoint = self::_GetInt2d($recordData, 2);
                if (in_array($splitPoint, $validSplitPoints)) {
                        // get spliced record data (and move pointer to next record)
                        $splicedRecordData = $this->_getSplicedRecordData();
                        $this->_drawingData .= $splicedRecordData['recordData'];

                        return;
                }

                // move stream pointer to next record
                $this->_pos += 4 + $length;

        }


        private function _getSplicedRecordData()
        {
                $data = '';
                $spliceOffsets = array();

                $i = 0;
                $spliceOffsets[0] = 0;

                do {
                        ++$i;

                        // offset: 0; size: 2; identifier
                        $identifier = self::_GetInt2d($this->_data, $this->_pos);
                        // offset: 2; size: 2; length
                        $length = self::_GetInt2d($this->_data, $this->_pos + 2);
                        $data .= $this->_readRecordData($this->_data, $this->_pos + 4, $length);

                        $spliceOffsets[$i] = $spliceOffsets[$i - 1] + $length;

                        $this->_pos += 4 + $length;
                        $nextIdentifier = self::_GetInt2d($this->_data, $this->_pos);
                }
                while ($nextIdentifier == self::XLS_Type_CONTINUE);

                $splicedData = array(
                        'recordData' => $data,
                        'spliceOffsets' => $spliceOffsets,
                );

                return $splicedData;

        }


        private function _getFormulaFromStructure($formulaStructure, $baseCell = 'A1')
        {
                // offset: 0; size: 2; size of the following formula data
                $sz = self::_GetInt2d($formulaStructure, 0);

                // offset: 2; size: sz
                $formulaData = substr($formulaStructure, 2, $sz);

                // for debug: dump the formula data
                //echo '<xmp>';
                //echo 'size: ' . $sz . "\n";
                //echo 'the entire formula data: ';
                //Debug::dump($formulaData);
                //echo "\n----\n";

                // offset: 2 + sz; size: variable (optional)
                if (strlen($formulaStructure) > 2 + $sz) {
                        $additionalData = substr($formulaStructure, 2 + $sz);

                        // for debug: dump the additional data
                        //echo 'the entire additional data: ';
                        //Debug::dump($additionalData);
                        //echo "\n----\n";

                } else {
                        $additionalData = '';
                }

                return $this->_getFormulaFromData($formulaData, $additionalData, $baseCell);
        }


        private function _getFormulaFromData($formulaData,  $additionalData = '', $baseCell = 'A1')
        {
                // start parsing the formula data
                $tokens = array();

                while (strlen($formulaData) > 0 and $token = $this->_getNextToken($formulaData, $baseCell)) {
                        $tokens[] = $token;
                        $formulaData = substr($formulaData, $token['size']);

                        // for debug: dump the token
                        //var_dump($token);
                }

                $formulaString = $this->_createFormulaFromTokens($tokens, $additionalData);

                return $formulaString;
        }


        private function _createFormulaFromTokens($tokens, $additionalData)
        {
                // empty formula?
                if (empty($tokens)) {
                        return '';
                }

                $formulaStrings = array();
                foreach ($tokens as $token) {
                        // initialize spaces
                        $space0 = isset($space0) ? $space0 : ''; // spaces before next token, not tParen
                        $space1 = isset($space1) ? $space1 : ''; // carriage returns before next token, not tParen
                        $space2 = isset($space2) ? $space2 : ''; // spaces before opening parenthesis
                        $space3 = isset($space3) ? $space3 : ''; // carriage returns before opening parenthesis
                        $space4 = isset($space4) ? $space4 : ''; // spaces before closing parenthesis
                        $space5 = isset($space5) ? $space5 : ''; // carriage returns before closing parenthesis

                        switch ($token['name']) {
                        case 'tAdd': // addition
                        case 'tConcat': // addition
                        case 'tDiv': // division
                        case 'tEQ': // equality
                        case 'tGE': // greater than or equal
                        case 'tGT': // greater than
                        case 'tIsect': // intersection
                        case 'tLE': // less than or equal
                        case 'tList': // less than or equal
                        case 'tLT': // less than
                        case 'tMul': // multiplication
                        case 'tNE': // multiplication
                        case 'tPower': // power
                        case 'tRange': // range
                        case 'tSub': // subtraction
                                $op2 = array_pop($formulaStrings);
                                $op1 = array_pop($formulaStrings);
                                $formulaStrings[] = "$op1$space1$space0{$token['data']}$op2";
                                unset($space0, $space1);
                                break;
                        case 'tUplus': // unary plus
                        case 'tUminus': // unary minus
                                $op = array_pop($formulaStrings);
                                $formulaStrings[] = "$space1$space0{$token['data']}$op";
                                unset($space0, $space1);
                                break;
                        case 'tPercent': // percent sign
                                $op = array_pop($formulaStrings);
                                $formulaStrings[] = "$op$space1$space0{$token['data']}";
                                unset($space0, $space1);
                                break;
                        case 'tAttrVolatile': // indicates volatile function
                        case 'tAttrIf':
                        case 'tAttrSkip':
                        case 'tAttrChoose':
                                // token is only important for Excel formula evaluator
                                // do nothing
                                break;
                        case 'tAttrSpace': // space / carriage return
                                // space will be used when next token arrives, do not alter formulaString stack
                                switch ($token['data']['spacetype']) {
                                case 'type0':
                                        $space0 = str_repeat(' ', $token['data']['spacecount']);
                                        break;
                                case 'type1':
                                        $space1 = str_repeat("\n", $token['data']['spacecount']);
                                        break;
                                case 'type2':
                                        $space2 = str_repeat(' ', $token['data']['spacecount']);
                                        break;
                                case 'type3':
                                        $space3 = str_repeat("\n", $token['data']['spacecount']);
                                        break;
                                case 'type4':
                                        $space4 = str_repeat(' ', $token['data']['spacecount']);
                                        break;
                                case 'type5':
                                        $space5 = str_repeat("\n", $token['data']['spacecount']);
                                        break;
                                }
                                break;
                        case 'tAttrSum': // SUM function with one parameter
                                $op = array_pop($formulaStrings);
                                $formulaStrings[] = "{$space1}{$space0}SUM($op)";
                                unset($space0, $space1);
                                break;
                        case 'tFunc': // function with fixed number of arguments
                        case 'tFuncV': // function with variable number of arguments
                                if ($token['data']['function'] != '') {
                                        // normal function
                                        $ops = array(); // array of operators
                                        for ($i = 0; $i < $token['data']['args']; ++$i) {
                                                $ops[] = array_pop($formulaStrings);
                                        }
                                        $ops = array_reverse($ops);
                                        $formulaStrings[] = "$space1$space0{$token['data']['function']}(" . implode(',', $ops) . ")";
                                        unset($space0, $space1);
                                } else {
                                        // add-in function
                                        $ops = array(); // array of operators
                                        for ($i = 0; $i < $token['data']['args'] - 1; ++$i) {
                                                $ops[] = array_pop($formulaStrings);
                                        }
                                        $ops = array_reverse($ops);
                                        $function = array_pop($formulaStrings);
                                        $formulaStrings[] = "$space1$space0$function(" . implode(',', $ops) . ")";
                                        unset($space0, $space1);
                                }
                                break;
                        case 'tParen': // parenthesis
                                $expression = array_pop($formulaStrings);
                                $formulaStrings[] = "$space3$space2($expression$space5$space4)";
                                unset($space2, $space3, $space4, $space5);
                                break;
                        case 'tArray': // array constant
                                $constantArray = self::_readBIFF8ConstantArray($additionalData);
                                $formulaStrings[] = $space1 . $space0 . $constantArray['value'];
                                $additionalData = substr($additionalData, $constantArray['size']); // bite of chunk of additional data
                                unset($space0, $space1);
                                break;
                        case 'tMemArea':
                                // bite off chunk of additional data
                                $cellRangeAddressList = $this->_readBIFF8CellRangeAddressList($additionalData);
                                $additionalData = substr($additionalData, $cellRangeAddressList['size']);
                                $formulaStrings[] = "$space1$space0{$token['data']}";
                                unset($space0, $space1);
                                break;
                        case 'tArea': // cell range address
                        case 'tBool': // boolean
                        case 'tErr': // error code
                        case 'tInt': // integer
                        case 'tMemErr':
                        case 'tMemFunc':
                        case 'tMissArg':
                        case 'tName':
                        case 'tNameX':
                        case 'tNum': // number
                        case 'tRef': // single cell reference
                        case 'tRef3d': // 3d cell reference
                        case 'tArea3d': // 3d cell range reference
                        case 'tRefN':
                        case 'tAreaN':
                        case 'tStr': // string
                                $formulaStrings[] = "$space1$space0{$token['data']}";
                                unset($space0, $space1);
                                break;
                        }
                }
                $formulaString = $formulaStrings[0];

                // for debug: dump the human readable formula
                //echo '----' . "\n";
                //echo 'Formula: ' . $formulaString;

                return $formulaString;
        }


        private function _getNextToken($formulaData, $baseCell = 'A1')
        {
                // offset: 0; size: 1; token id
                $id = ord($formulaData[0]); // token id
                $name = false; // initialize token name

                switch ($id) {
                case 0x03: $name = 'tAdd';              $size = 1;      $data = '+';    break;
                case 0x04: $name = 'tSub';              $size = 1;      $data = '-';    break;
                case 0x05: $name = 'tMul';              $size = 1;      $data = '*';    break;
                case 0x06: $name = 'tDiv';              $size = 1;      $data = '/';    break;
                case 0x07: $name = 'tPower';    $size = 1;      $data = '^';    break;
                case 0x08: $name = 'tConcat';   $size = 1;      $data = '&';    break;
                case 0x09: $name = 'tLT';               $size = 1;      $data = '<';    break;
                case 0x0A: $name = 'tLE';               $size = 1;      $data = '<=';   break;
                case 0x0B: $name = 'tEQ';               $size = 1;      $data = '=';    break;
                case 0x0C: $name = 'tGE';               $size = 1;      $data = '>=';   break;
                case 0x0D: $name = 'tGT';               $size = 1;      $data = '>';    break;
                case 0x0E: $name = 'tNE';               $size = 1;      $data = '<>';   break;
                case 0x0F: $name = 'tIsect';    $size = 1;      $data = ' ';    break;
                case 0x10: $name = 'tList';             $size = 1;      $data = ',';    break;
                case 0x11: $name = 'tRange';    $size = 1;      $data = ':';    break;
                case 0x12: $name = 'tUplus';    $size = 1;      $data = '+';    break;
                case 0x13: $name = 'tUminus';   $size = 1;      $data = '-';    break;
                case 0x14: $name = 'tPercent';  $size = 1;      $data = '%';    break;
                case 0x15:      //      parenthesis
                        $name  = 'tParen';
                        $size  = 1;
                        $data = null;
                        break;
                case 0x16:      //      missing argument
                        $name = 'tMissArg';
                        $size = 1;
                        $data = '';
                        break;
                case 0x17:      //      string
                        $name = 'tStr';
                        // offset: 1; size: var; Unicode string, 8-bit string length
                        $string = self::_readUnicodeStringShort(substr($formulaData, 1));
                        $size = 1 + $string['size'];
                        $data = self::_UTF8toExcelDoubleQuoted($string['value']);
                        break;
                case 0x19:      //      Special attribute
                        // offset: 1; size: 1; attribute type flags:
                        switch (ord($formulaData[1])) {
                        case 0x01:
                                $name = 'tAttrVolatile';
                                $size = 4;
                                $data = null;
                                break;
                        case 0x02:
                                $name = 'tAttrIf';
                                $size = 4;
                                $data = null;
                                break;
                        case 0x04:
                                $name = 'tAttrChoose';
                                // offset: 2; size: 2; number of choices in the CHOOSE function ($nc, number of parameters decreased by 1)
                                $nc = self::_GetInt2d($formulaData, 2);
                                // offset: 4; size: 2 * $nc
                                // offset: 4 + 2 * $nc; size: 2
                                $size = 2 * $nc + 6;
                                $data = null;
                                break;
                        case 0x08:
                                $name = 'tAttrSkip';
                                $size = 4;
                                $data = null;
                                break;
                        case 0x10:
                                $name = 'tAttrSum';
                                $size = 4;
                                $data = null;
                                break;
                        case 0x40:
                        case 0x41:
                                $name = 'tAttrSpace';
                                $size = 4;
                                // offset: 2; size: 2; space type and position
                                switch (ord($formulaData[2])) {
                                case 0x00:
                                        $spacetype = 'type0';
                                        break;
                                case 0x01:
                                        $spacetype = 'type1';
                                        break;
                                case 0x02:
                                        $spacetype = 'type2';
                                        break;
                                case 0x03:
                                        $spacetype = 'type3';
                                        break;
                                case 0x04:
                                        $spacetype = 'type4';
                                        break;
                                case 0x05:
                                        $spacetype = 'type5';
                                        break;
                                default:
                                        throw new PHPExcel_Reader_Exception('Unrecognized space type in tAttrSpace token');
                                        break;
                                }
                                // offset: 3; size: 1; number of inserted spaces/carriage returns
                                $spacecount = ord($formulaData[3]);

                                $data = array('spacetype' => $spacetype, 'spacecount' => $spacecount);
                                break;
                        default:
                                throw new PHPExcel_Reader_Exception('Unrecognized attribute flag in tAttr token');
                                break;
                        }
                        break;
                case 0x1C:      //      error code
                        // offset: 1; size: 1; error code
                        $name = 'tErr';
                        $size = 2;
                        $data = self::_mapErrorCode(ord($formulaData[1]));
                        break;
                case 0x1D:      //      boolean
                        // offset: 1; size: 1; 0 = false, 1 = true;
                        $name = 'tBool';
                        $size = 2;
                        $data = ord($formulaData[1]) ? 'TRUE' : 'FALSE';
                        break;
                case 0x1E:      //      integer
                        // offset: 1; size: 2; unsigned 16-bit integer
                        $name = 'tInt';
                        $size = 3;
                        $data = self::_GetInt2d($formulaData, 1);
                        break;
                case 0x1F:      //      number
                        // offset: 1; size: 8;
                        $name = 'tNum';
                        $size = 9;
                        $data = self::_extractNumber(substr($formulaData, 1));
                        $data = str_replace(',', '.', (string)$data); // in case non-English locale
                        break;
                case 0x20:      //      array constant
                case 0x40:
                case 0x60:
                        // offset: 1; size: 7; not used
                        $name = 'tArray';
                        $size = 8;
                        $data = null;
                        break;
                case 0x21:      //      function with fixed number of arguments
                case 0x41:
                case 0x61:
                        $name = 'tFunc';
                        $size = 3;
                        // offset: 1; size: 2; index to built-in sheet function
                        switch (self::_GetInt2d($formulaData, 1)) {
                        case   2: $function = 'ISNA';                   $args = 1;      break;
                        case   3: $function = 'ISERROR';                $args = 1;      break;
                        case  10: $function = 'NA';                     $args = 0;      break;
                        case  15: $function = 'SIN';                    $args = 1;      break;
                        case  16: $function = 'COS';                    $args = 1;      break;
                        case  17: $function = 'TAN';                    $args = 1;      break;
                        case  18: $function = 'ATAN';                   $args = 1;      break;
                        case  19: $function = 'PI';                     $args = 0;      break;
                        case  20: $function = 'SQRT';                   $args = 1;      break;
                        case  21: $function = 'EXP';                    $args = 1;      break;
                        case  22: $function = 'LN';                     $args = 1;      break;
                        case  23: $function = 'LOG10';                  $args = 1;      break;
                        case  24: $function = 'ABS';                    $args = 1;      break;
                        case  25: $function = 'INT';                    $args = 1;      break;
                        case  26: $function = 'SIGN';                   $args = 1;      break;
                        case  27: $function = 'ROUND';                  $args = 2;      break;
                        case  30: $function = 'REPT';                   $args = 2;      break;
                        case  31: $function = 'MID';                    $args = 3;      break;
                        case  32: $function = 'LEN';                    $args = 1;      break;
                        case  33: $function = 'VALUE';                  $args = 1;      break;
                        case  34: $function = 'TRUE';                   $args = 0;      break;
                        case  35: $function = 'FALSE';                  $args = 0;      break;
                        case  38: $function = 'NOT';                    $args = 1;      break;
                        case  39: $function = 'MOD';                    $args = 2;      break;
                        case  40: $function = 'DCOUNT';                 $args = 3;      break;
                        case  41: $function = 'DSUM';                   $args = 3;      break;
                        case  42: $function = 'DAVERAGE';               $args = 3;      break;
                        case  43: $function = 'DMIN';                   $args = 3;      break;
                        case  44: $function = 'DMAX';                   $args = 3;      break;
                        case  45: $function = 'DSTDEV';                 $args = 3;      break;
                        case  48: $function = 'TEXT';                   $args = 2;      break;
                        case  61: $function = 'MIRR';                   $args = 3;      break;
                        case  63: $function = 'RAND';                   $args = 0;      break;
                        case  65: $function = 'DATE';                   $args = 3;      break;
                        case  66: $function = 'TIME';                   $args = 3;      break;
                        case  67: $function = 'DAY';                    $args = 1;      break;
                        case  68: $function = 'MONTH';                  $args = 1;      break;
                        case  69: $function = 'YEAR';                   $args = 1;      break;
                        case  71: $function = 'HOUR';                   $args = 1;      break;
                        case  72: $function = 'MINUTE';                 $args = 1;      break;
                        case  73: $function = 'SECOND';                 $args = 1;      break;
                        case  74: $function = 'NOW';                    $args = 0;      break;
                        case  75: $function = 'AREAS';                  $args = 1;      break;
                        case  76: $function = 'ROWS';                   $args = 1;      break;
                        case  77: $function = 'COLUMNS';                $args = 1;      break;
                        case  83: $function = 'TRANSPOSE';              $args = 1;      break;
                        case  86: $function = 'TYPE';                   $args = 1;      break;
                        case  97: $function = 'ATAN2';                  $args = 2;      break;
                        case  98: $function = 'ASIN';                   $args = 1;      break;
                        case  99: $function = 'ACOS';                   $args = 1;      break;
                        case 105: $function = 'ISREF';                  $args = 1;      break;
                        case 111: $function = 'CHAR';                   $args = 1;      break;
                        case 112: $function = 'LOWER';                  $args = 1;      break;
                        case 113: $function = 'UPPER';                  $args = 1;      break;
                        case 114: $function = 'PROPER';                 $args = 1;      break;
                        case 117: $function = 'EXACT';                  $args = 2;      break;
                        case 118: $function = 'TRIM';                   $args = 1;      break;
                        case 119: $function = 'REPLACE';                $args = 4;      break;
                        case 121: $function = 'CODE';                   $args = 1;      break;
                        case 126: $function = 'ISERR';                  $args = 1;      break;
                        case 127: $function = 'ISTEXT';                 $args = 1;      break;
                        case 128: $function = 'ISNUMBER';               $args = 1;      break;
                        case 129: $function = 'ISBLANK';                $args = 1;      break;
                        case 130: $function = 'T';                              $args = 1;      break;
                        case 131: $function = 'N';                              $args = 1;      break;
                        case 140: $function = 'DATEVALUE';              $args = 1;      break;
                        case 141: $function = 'TIMEVALUE';              $args = 1;      break;
                        case 142: $function = 'SLN';                    $args = 3;      break;
                        case 143: $function = 'SYD';                    $args = 4;      break;
                        case 162: $function = 'CLEAN';                  $args = 1;      break;
                        case 163: $function = 'MDETERM';                $args = 1;      break;
                        case 164: $function = 'MINVERSE';               $args = 1;      break;
                        case 165: $function = 'MMULT';                  $args = 2;      break;
                        case 184: $function = 'FACT';                   $args = 1;      break;
                        case 189: $function = 'DPRODUCT';               $args = 3;      break;
                        case 190: $function = 'ISNONTEXT';              $args = 1;      break;
                        case 195: $function = 'DSTDEVP';                $args = 3;      break;
                        case 196: $function = 'DVARP';                  $args = 3;      break;
                        case 198: $function = 'ISLOGICAL';              $args = 1;      break;
                        case 199: $function = 'DCOUNTA';                $args = 3;      break;
                        case 207: $function = 'REPLACEB';               $args = 4;      break;
                        case 210: $function = 'MIDB';                   $args = 3;      break;
                        case 211: $function = 'LENB';                   $args = 1;      break;
                        case 212: $function = 'ROUNDUP';                $args = 2;      break;
                        case 213: $function = 'ROUNDDOWN';              $args = 2;      break;
                        case 214: $function = 'ASC';                    $args = 1;      break;
                        case 215: $function = 'DBCS';                   $args = 1;      break;
                        case 221: $function = 'TODAY';                  $args = 0;      break;
                        case 229: $function = 'SINH';                   $args = 1;      break;
                        case 230: $function = 'COSH';                   $args = 1;      break;
                        case 231: $function = 'TANH';                   $args = 1;      break;
                        case 232: $function = 'ASINH';                  $args = 1;      break;
                        case 233: $function = 'ACOSH';                  $args = 1;      break;
                        case 234: $function = 'ATANH';                  $args = 1;      break;
                        case 235: $function = 'DGET';                   $args = 3;      break;
                        case 244: $function = 'INFO';                   $args = 1;      break;
                        case 252: $function = 'FREQUENCY';              $args = 2;      break;
                        case 261: $function = 'ERROR.TYPE';     $args = 1;      break;
                        case 271: $function = 'GAMMALN';                $args = 1;      break;
                        case 273: $function = 'BINOMDIST';              $args = 4;      break;
                        case 274: $function = 'CHIDIST';                $args = 2;      break;
                        case 275: $function = 'CHIINV';                 $args = 2;      break;
                        case 276: $function = 'COMBIN';                 $args = 2;      break;
                        case 277: $function = 'CONFIDENCE';     $args = 3;      break;
                        case 278: $function = 'CRITBINOM';              $args = 3;      break;
                        case 279: $function = 'EVEN';                   $args = 1;      break;
                        case 280: $function = 'EXPONDIST';              $args = 3;      break;
                        case 281: $function = 'FDIST';                  $args = 3;      break;
                        case 282: $function = 'FINV';                   $args = 3;      break;
                        case 283: $function = 'FISHER';                 $args = 1;      break;
                        case 284: $function = 'FISHERINV';              $args = 1;      break;
                        case 285: $function = 'FLOOR';                  $args = 2;      break;
                        case 286: $function = 'GAMMADIST';              $args = 4;      break;
                        case 287: $function = 'GAMMAINV';               $args = 3;      break;
                        case 288: $function = 'CEILING';                $args = 2;      break;
                        case 289: $function = 'HYPGEOMDIST';    $args = 4;      break;
                        case 290: $function = 'LOGNORMDIST';    $args = 3;      break;
                        case 291: $function = 'LOGINV';                 $args = 3;      break;
                        case 292: $function = 'NEGBINOMDIST';   $args = 3;      break;
                        case 293: $function = 'NORMDIST';               $args = 4;      break;
                        case 294: $function = 'NORMSDIST';              $args = 1;      break;
                        case 295: $function = 'NORMINV';                $args = 3;      break;
                        case 296: $function = 'NORMSINV';               $args = 1;      break;
                        case 297: $function = 'STANDARDIZE';    $args = 3;      break;
                        case 298: $function = 'ODD';                    $args = 1;      break;
                        case 299: $function = 'PERMUT';                 $args = 2;      break;
                        case 300: $function = 'POISSON';                $args = 3;      break;
                        case 301: $function = 'TDIST';                  $args = 3;      break;
                        case 302: $function = 'WEIBULL';                $args = 4;      break;
                        case 303: $function = 'SUMXMY2';                $args = 2;      break;
                        case 304: $function = 'SUMX2MY2';               $args = 2;      break;
                        case 305: $function = 'SUMX2PY2';               $args = 2;      break;
                        case 306: $function = 'CHITEST';                $args = 2;      break;
                        case 307: $function = 'CORREL';                 $args = 2;      break;
                        case 308: $function = 'COVAR';                  $args = 2;      break;
                        case 309: $function = 'FORECAST';               $args = 3;      break;
                        case 310: $function = 'FTEST';                  $args = 2;      break;
                        case 311: $function = 'INTERCEPT';              $args = 2;      break;
                        case 312: $function = 'PEARSON';                $args = 2;      break;
                        case 313: $function = 'RSQ';                    $args = 2;      break;
                        case 314: $function = 'STEYX';                  $args = 2;      break;
                        case 315: $function = 'SLOPE';                  $args = 2;      break;
                        case 316: $function = 'TTEST';                  $args = 4;      break;
                        case 325: $function = 'LARGE';                  $args = 2;      break;
                        case 326: $function = 'SMALL';                  $args = 2;      break;
                        case 327: $function = 'QUARTILE';               $args = 2;      break;
                        case 328: $function = 'PERCENTILE';             $args = 2;      break;
                        case 331: $function = 'TRIMMEAN';               $args = 2;      break;
                        case 332: $function = 'TINV';                   $args = 2;      break;
                        case 337: $function = 'POWER';                  $args = 2;      break;
                        case 342: $function = 'RADIANS';                $args = 1;      break;
                        case 343: $function = 'DEGREES';                $args = 1;      break;
                        case 346: $function = 'COUNTIF';                $args = 2;      break;
                        case 347: $function = 'COUNTBLANK';             $args = 1;      break;
                        case 350: $function = 'ISPMT';                  $args = 4;      break;
                        case 351: $function = 'DATEDIF';                $args = 3;      break;
                        case 352: $function = 'DATESTRING';             $args = 1;      break;
                        case 353: $function = 'NUMBERSTRING';   $args = 2;      break;
                        case 360: $function = 'PHONETIC';               $args = 1;      break;
                        case 368: $function = 'BAHTTEXT';               $args = 1;      break;
                        default:
                                throw new PHPExcel_Reader_Exception('Unrecognized function in formula');
                                break;
                        }
                        $data = array('function' => $function, 'args' => $args);
                        break;
                case 0x22:      //      function with variable number of arguments
                case 0x42:
                case 0x62:
                        $name = 'tFuncV';
                        $size = 4;
                        // offset: 1; size: 1; number of arguments
                        $args = ord($formulaData[1]);
                        // offset: 2: size: 2; index to built-in sheet function
                        $index = self::_GetInt2d($formulaData, 2);
                        switch ($index) {
                        case   0: $function = 'COUNT';                  break;
                        case   1: $function = 'IF';                             break;
                        case   4: $function = 'SUM';                    break;
                        case   5: $function = 'AVERAGE';                break;
                        case   6: $function = 'MIN';                    break;
                        case   7: $function = 'MAX';                    break;
                        case   8: $function = 'ROW';                    break;
                        case   9: $function = 'COLUMN';                 break;
                        case  11: $function = 'NPV';                    break;
                        case  12: $function = 'STDEV';                  break;
                        case  13: $function = 'DOLLAR';                 break;
                        case  14: $function = 'FIXED';                  break;
                        case  28: $function = 'LOOKUP';                 break;
                        case  29: $function = 'INDEX';                  break;
                        case  36: $function = 'AND';                    break;
                        case  37: $function = 'OR';                             break;
                        case  46: $function = 'VAR';                    break;
                        case  49: $function = 'LINEST';                 break;
                        case  50: $function = 'TREND';                  break;
                        case  51: $function = 'LOGEST';                 break;
                        case  52: $function = 'GROWTH';                 break;
                        case  56: $function = 'PV';                             break;
                        case  57: $function = 'FV';                             break;
                        case  58: $function = 'NPER';                   break;
                        case  59: $function = 'PMT';                    break;
                        case  60: $function = 'RATE';                   break;
                        case  62: $function = 'IRR';                    break;
                        case  64: $function = 'MATCH';                  break;
                        case  70: $function = 'WEEKDAY';                break;
                        case  78: $function = 'OFFSET';                 break;
                        case  82: $function = 'SEARCH';                 break;
                        case 100: $function = 'CHOOSE';                 break;
                        case 101: $function = 'HLOOKUP';                break;
                        case 102: $function = 'VLOOKUP';                break;
                        case 109: $function = 'LOG';                    break;
                        case 115: $function = 'LEFT';                   break;
                        case 116: $function = 'RIGHT';                  break;
                        case 120: $function = 'SUBSTITUTE';             break;
                        case 124: $function = 'FIND';                   break;
                        case 125: $function = 'CELL';                   break;
                        case 144: $function = 'DDB';                    break;
                        case 148: $function = 'INDIRECT';               break;
                        case 167: $function = 'IPMT';                   break;
                        case 168: $function = 'PPMT';                   break;
                        case 169: $function = 'COUNTA';                 break;
                        case 183: $function = 'PRODUCT';                break;
                        case 193: $function = 'STDEVP';                 break;
                        case 194: $function = 'VARP';                   break;
                        case 197: $function = 'TRUNC';                  break;
                        case 204: $function = 'USDOLLAR';               break;
                        case 205: $function = 'FINDB';                  break;
                        case 206: $function = 'SEARCHB';                break;
                        case 208: $function = 'LEFTB';                  break;
                        case 209: $function = 'RIGHTB';                 break;
                        case 216: $function = 'RANK';                   break;
                        case 219: $function = 'ADDRESS';                break;
                        case 220: $function = 'DAYS360';                break;
                        case 222: $function = 'VDB';                    break;
                        case 227: $function = 'MEDIAN';                 break;
                        case 228: $function = 'SUMPRODUCT';             break;
                        case 247: $function = 'DB';                             break;
                        case 255: $function = '';                               break;
                        case 269: $function = 'AVEDEV';                 break;
                        case 270: $function = 'BETADIST';               break;
                        case 272: $function = 'BETAINV';                break;
                        case 317: $function = 'PROB';                   break;
                        case 318: $function = 'DEVSQ';                  break;
                        case 319: $function = 'GEOMEAN';                break;
                        case 320: $function = 'HARMEAN';                break;
                        case 321: $function = 'SUMSQ';                  break;
                        case 322: $function = 'KURT';                   break;
                        case 323: $function = 'SKEW';                   break;
                        case 324: $function = 'ZTEST';                  break;
                        case 329: $function = 'PERCENTRANK';    break;
                        case 330: $function = 'MODE';                   break;
                        case 336: $function = 'CONCATENATE';    break;
                        case 344: $function = 'SUBTOTAL';               break;
                        case 345: $function = 'SUMIF';                  break;
                        case 354: $function = 'ROMAN';                  break;
                        case 358: $function = 'GETPIVOTDATA';   break;
                        case 359: $function = 'HYPERLINK';              break;
                        case 361: $function = 'AVERAGEA';               break;
                        case 362: $function = 'MAXA';                   break;
                        case 363: $function = 'MINA';                   break;
                        case 364: $function = 'STDEVPA';                break;
                        case 365: $function = 'VARPA';                  break;
                        case 366: $function = 'STDEVA';                 break;
                        case 367: $function = 'VARA';                   break;
                        default:
                                throw new PHPExcel_Reader_Exception('Unrecognized function in formula');
                                break;
                        }
                        $data = array('function' => $function, 'args' => $args);
                        break;
                case 0x23:      //      index to defined name
                case 0x43:
                case 0x63:
                        $name = 'tName';
                        $size = 5;
                        // offset: 1; size: 2; one-based index to definedname record
                        $definedNameIndex = self::_GetInt2d($formulaData, 1) - 1;
                        // offset: 2; size: 2; not used
                        $data = $this->_definedname[$definedNameIndex]['name'];
                        break;
                case 0x24:      //      single cell reference e.g. A5
                case 0x44:
                case 0x64:
                        $name = 'tRef';
                        $size = 5;
                        $data = $this->_readBIFF8CellAddress(substr($formulaData, 1, 4));
                        break;
                case 0x25:      //      cell range reference to cells in the same sheet (2d)
                case 0x45:
                case 0x65:
                        $name = 'tArea';
                        $size = 9;
                        $data = $this->_readBIFF8CellRangeAddress(substr($formulaData, 1, 8));
                        break;
                case 0x26:      //      Constant reference sub-expression
                case 0x46:
                case 0x66:
                        $name = 'tMemArea';
                        // offset: 1; size: 4; not used
                        // offset: 5; size: 2; size of the following subexpression
                        $subSize = self::_GetInt2d($formulaData, 5);
                        $size = 7 + $subSize;
                        $data = $this->_getFormulaFromData(substr($formulaData, 7, $subSize));
                        break;
                case 0x27:      //      Deleted constant reference sub-expression
                case 0x47:
                case 0x67:
                        $name = 'tMemErr';
                        // offset: 1; size: 4; not used
                        // offset: 5; size: 2; size of the following subexpression
                        $subSize = self::_GetInt2d($formulaData, 5);
                        $size = 7 + $subSize;
                        $data = $this->_getFormulaFromData(substr($formulaData, 7, $subSize));
                        break;
                case 0x29:      //      Variable reference sub-expression
                case 0x49:
                case 0x69:
                        $name = 'tMemFunc';
                        // offset: 1; size: 2; size of the following sub-expression
                        $subSize = self::_GetInt2d($formulaData, 1);
                        $size = 3 + $subSize;
                        $data = $this->_getFormulaFromData(substr($formulaData, 3, $subSize));
                        break;

                case 0x2C: // Relative 2d cell reference reference, used in shared formulas and some other places
                case 0x4C:
                case 0x6C:
                        $name = 'tRefN';
                        $size = 5;
                        $data = $this->_readBIFF8CellAddressB(substr($formulaData, 1, 4), $baseCell);
                        break;

                case 0x2D:      //      Relative 2d range reference
                case 0x4D:
                case 0x6D:
                        $name = 'tAreaN';
                        $size = 9;
                        $data = $this->_readBIFF8CellRangeAddressB(substr($formulaData, 1, 8), $baseCell);
                        break;

                case 0x39:      //      External name
                case 0x59:
                case 0x79:
                        $name = 'tNameX';
                        $size = 7;
                        // offset: 1; size: 2; index to REF entry in EXTERNSHEET record
                        // offset: 3; size: 2; one-based index to DEFINEDNAME or EXTERNNAME record
                        $index = self::_GetInt2d($formulaData, 3);
                        // assume index is to EXTERNNAME record
                        $data = $this->_externalNames[$index - 1]['name'];
                        // offset: 5; size: 2; not used
                        break;

                case 0x3A:      //      3d reference to cell
                case 0x5A:
                case 0x7A:
                        $name = 'tRef3d';
                        $size = 7;

                        try {
                                // offset: 1; size: 2; index to REF entry
                                $sheetRange = $this->_readSheetRangeByRefIndex(self::_GetInt2d($formulaData, 1));
                                // offset: 3; size: 4; cell address
                                $cellAddress = $this->_readBIFF8CellAddress(substr($formulaData, 3, 4));

                                $data = "$sheetRange!$cellAddress";
                        } catch (PHPExcel_Exception $e) {
                                // deleted sheet reference
                                $data = '#REF!';
                        }

                        break;
                case 0x3B:      //      3d reference to cell range
                case 0x5B:
                case 0x7B:
                        $name = 'tArea3d';
                        $size = 11;

                        try {
                                // offset: 1; size: 2; index to REF entry
                                $sheetRange = $this->_readSheetRangeByRefIndex(self::_GetInt2d($formulaData, 1));
                                // offset: 3; size: 8; cell address
                                $cellRangeAddress = $this->_readBIFF8CellRangeAddress(substr($formulaData, 3, 8));

                                $data = "$sheetRange!$cellRangeAddress";
                        } catch (PHPExcel_Exception $e) {
                                // deleted sheet reference
                                $data = '#REF!';
                        }

                        break;
                // Unknown cases        // don't know how to deal with
                default:
                        throw new PHPExcel_Reader_Exception('Unrecognized token ' . sprintf('%02X', $id) . ' in formula');
                        break;
                }

                return array(
                        'id' => $id,
                        'name' => $name,
                        'size' => $size,
                        'data' => $data,
                );
        }


        private function _readBIFF8CellAddress($cellAddressStructure)
        {
                // offset: 0; size: 2; index to row (0... 65535) (or offset (-32768... 32767))
                $row = self::_GetInt2d($cellAddressStructure, 0) + 1;

                // offset: 2; size: 2; index to column or column offset + relative flags

                        // bit: 7-0; mask 0x00FF; column index
                        $column = PHPExcel_Cell::stringFromColumnIndex(0x00FF & self::_GetInt2d($cellAddressStructure, 2));

                        // bit: 14; mask 0x4000; (1 = relative column index, 0 = absolute column index)
                        if (!(0x4000 & self::_GetInt2d($cellAddressStructure, 2))) {
                                $column = '$' . $column;
                        }
                        // bit: 15; mask 0x8000; (1 = relative row index, 0 = absolute row index)
                        if (!(0x8000 & self::_GetInt2d($cellAddressStructure, 2))) {
                                $row = '$' . $row;
                        }

                return $column . $row;
        }


        private function _readBIFF8CellAddressB($cellAddressStructure, $baseCell = 'A1')
        {
                list($baseCol, $baseRow) = PHPExcel_Cell::coordinateFromString($baseCell);
                $baseCol = PHPExcel_Cell::columnIndexFromString($baseCol) - 1;

                // offset: 0; size: 2; index to row (0... 65535) (or offset (-32768... 32767))
                        $rowIndex = self::_GetInt2d($cellAddressStructure, 0);
                        $row = self::_GetInt2d($cellAddressStructure, 0) + 1;

                // offset: 2; size: 2; index to column or column offset + relative flags

                        // bit: 7-0; mask 0x00FF; column index
                        $colIndex = 0x00FF & self::_GetInt2d($cellAddressStructure, 2);

                        // bit: 14; mask 0x4000; (1 = relative column index, 0 = absolute column index)
                        if (!(0x4000 & self::_GetInt2d($cellAddressStructure, 2))) {
                                $column = PHPExcel_Cell::stringFromColumnIndex($colIndex);
                                $column = '$' . $column;
                        } else {
                                $colIndex = ($colIndex <= 127) ? $colIndex : $colIndex - 256;
                                $column = PHPExcel_Cell::stringFromColumnIndex($baseCol + $colIndex);
                        }

                        // bit: 15; mask 0x8000; (1 = relative row index, 0 = absolute row index)
                        if (!(0x8000 & self::_GetInt2d($cellAddressStructure, 2))) {
                                $row = '$' . $row;
                        } else {
                                $rowIndex = ($rowIndex <= 32767) ? $rowIndex : $rowIndex - 65536;
                                $row = $baseRow + $rowIndex;
                        }

                return $column . $row;
        }


        private function _readBIFF5CellRangeAddressFixed($subData)
        {
                // offset: 0; size: 2; index to first row
                $fr = self::_GetInt2d($subData, 0) + 1;

                // offset: 2; size: 2; index to last row
                $lr = self::_GetInt2d($subData, 2) + 1;

                // offset: 4; size: 1; index to first column
                $fc = ord($subData{4});

                // offset: 5; size: 1; index to last column
                $lc = ord($subData{5});

                // check values
                if ($fr > $lr || $fc > $lc) {
                        throw new PHPExcel_Reader_Exception('Not a cell range address');
                }

                // column index to letter
                $fc = PHPExcel_Cell::stringFromColumnIndex($fc);
                $lc = PHPExcel_Cell::stringFromColumnIndex($lc);

                if ($fr == $lr and $fc == $lc) {
                        return "$fc$fr";
                }
                return "$fc$fr:$lc$lr";
        }


        private function _readBIFF8CellRangeAddressFixed($subData)
        {
                // offset: 0; size: 2; index to first row
                $fr = self::_GetInt2d($subData, 0) + 1;

                // offset: 2; size: 2; index to last row
                $lr = self::_GetInt2d($subData, 2) + 1;

                // offset: 4; size: 2; index to first column
                $fc = self::_GetInt2d($subData, 4);

                // offset: 6; size: 2; index to last column
                $lc = self::_GetInt2d($subData, 6);

                // check values
                if ($fr > $lr || $fc > $lc) {
                        throw new PHPExcel_Reader_Exception('Not a cell range address');
                }

                // column index to letter
                $fc = PHPExcel_Cell::stringFromColumnIndex($fc);
                $lc = PHPExcel_Cell::stringFromColumnIndex($lc);

                if ($fr == $lr and $fc == $lc) {
                        return "$fc$fr";
                }
                return "$fc$fr:$lc$lr";
        }


        private function _readBIFF8CellRangeAddress($subData)
        {
                // todo: if cell range is just a single cell, should this funciton
                // not just return e.g. 'A1' and not 'A1:A1' ?

                // offset: 0; size: 2; index to first row (0... 65535) (or offset (-32768... 32767))
                        $fr = self::_GetInt2d($subData, 0) + 1;

                // offset: 2; size: 2; index to last row (0... 65535) (or offset (-32768... 32767))
                        $lr = self::_GetInt2d($subData, 2) + 1;

                // offset: 4; size: 2; index to first column or column offset + relative flags

                // bit: 7-0; mask 0x00FF; column index
                $fc = PHPExcel_Cell::stringFromColumnIndex(0x00FF & self::_GetInt2d($subData, 4));

                // bit: 14; mask 0x4000; (1 = relative column index, 0 = absolute column index)
                if (!(0x4000 & self::_GetInt2d($subData, 4))) {
                        $fc = '$' . $fc;
                }

                // bit: 15; mask 0x8000; (1 = relative row index, 0 = absolute row index)
                if (!(0x8000 & self::_GetInt2d($subData, 4))) {
                        $fr = '$' . $fr;
                }

                // offset: 6; size: 2; index to last column or column offset + relative flags

                // bit: 7-0; mask 0x00FF; column index
                $lc = PHPExcel_Cell::stringFromColumnIndex(0x00FF & self::_GetInt2d($subData, 6));

                // bit: 14; mask 0x4000; (1 = relative column index, 0 = absolute column index)
                if (!(0x4000 & self::_GetInt2d($subData, 6))) {
                        $lc = '$' . $lc;
                }

                // bit: 15; mask 0x8000; (1 = relative row index, 0 = absolute row index)
                if (!(0x8000 & self::_GetInt2d($subData, 6))) {
                        $lr = '$' . $lr;
                }

                return "$fc$fr:$lc$lr";
        }


        private function _readBIFF8CellRangeAddressB($subData, $baseCell = 'A1')
        {
                list($baseCol, $baseRow) = PHPExcel_Cell::coordinateFromString($baseCell);
                $baseCol = PHPExcel_Cell::columnIndexFromString($baseCol) - 1;

                // TODO: if cell range is just a single cell, should this funciton
                // not just return e.g. 'A1' and not 'A1:A1' ?

                // offset: 0; size: 2; first row
                $frIndex = self::_GetInt2d($subData, 0); // adjust below

                // offset: 2; size: 2; relative index to first row (0... 65535) should be treated as offset (-32768... 32767)
                $lrIndex = self::_GetInt2d($subData, 2); // adjust below

                // offset: 4; size: 2; first column with relative/absolute flags

                // bit: 7-0; mask 0x00FF; column index
                $fcIndex = 0x00FF & self::_GetInt2d($subData, 4);

                // bit: 14; mask 0x4000; (1 = relative column index, 0 = absolute column index)
                if (!(0x4000 & self::_GetInt2d($subData, 4))) {
                        // absolute column index
                        $fc = PHPExcel_Cell::stringFromColumnIndex($fcIndex);
                        $fc = '$' . $fc;
                } else {
                        // column offset
                        $fcIndex = ($fcIndex <= 127) ? $fcIndex : $fcIndex - 256;
                        $fc = PHPExcel_Cell::stringFromColumnIndex($baseCol + $fcIndex);
                }

                // bit: 15; mask 0x8000; (1 = relative row index, 0 = absolute row index)
                if (!(0x8000 & self::_GetInt2d($subData, 4))) {
                        // absolute row index
                        $fr = $frIndex + 1;
                        $fr = '$' . $fr;
                } else {
                        // row offset
                        $frIndex = ($frIndex <= 32767) ? $frIndex : $frIndex - 65536;
                        $fr = $baseRow + $frIndex;
                }

                // offset: 6; size: 2; last column with relative/absolute flags

                // bit: 7-0; mask 0x00FF; column index
                $lcIndex = 0x00FF & self::_GetInt2d($subData, 6);
                $lcIndex = ($lcIndex <= 127) ? $lcIndex : $lcIndex - 256;
                $lc = PHPExcel_Cell::stringFromColumnIndex($baseCol + $lcIndex);

                // bit: 14; mask 0x4000; (1 = relative column index, 0 = absolute column index)
                if (!(0x4000 & self::_GetInt2d($subData, 6))) {
                        // absolute column index
                        $lc = PHPExcel_Cell::stringFromColumnIndex($lcIndex);
                        $lc = '$' . $lc;
                } else {
                        // column offset
                        $lcIndex = ($lcIndex <= 127) ? $lcIndex : $lcIndex - 256;
                        $lc = PHPExcel_Cell::stringFromColumnIndex($baseCol + $lcIndex);
                }

                // bit: 15; mask 0x8000; (1 = relative row index, 0 = absolute row index)
                if (!(0x8000 & self::_GetInt2d($subData, 6))) {
                        // absolute row index
                        $lr = $lrIndex + 1;
                        $lr = '$' . $lr;
                } else {
                        // row offset
                        $lrIndex = ($lrIndex <= 32767) ? $lrIndex : $lrIndex - 65536;
                        $lr = $baseRow + $lrIndex;
                }

                return "$fc$fr:$lc$lr";
        }


        private function _readBIFF8CellRangeAddressList($subData)
        {
                $cellRangeAddresses = array();

                // offset: 0; size: 2; number of the following cell range addresses
                $nm = self::_GetInt2d($subData, 0);

                $offset = 2;
                // offset: 2; size: 8 * $nm; list of $nm (fixed) cell range addresses
                for ($i = 0; $i < $nm; ++$i) {
                        $cellRangeAddresses[] = $this->_readBIFF8CellRangeAddressFixed(substr($subData, $offset, 8));
                        $offset += 8;
                }

                return array(
                        'size' => 2 + 8 * $nm,
                        'cellRangeAddresses' => $cellRangeAddresses,
                );
        }


        private function _readBIFF5CellRangeAddressList($subData)
        {
                $cellRangeAddresses = array();

                // offset: 0; size: 2; number of the following cell range addresses
                $nm = self::_GetInt2d($subData, 0);

                $offset = 2;
                // offset: 2; size: 6 * $nm; list of $nm (fixed) cell range addresses
                for ($i = 0; $i < $nm; ++$i) {
                        $cellRangeAddresses[] = $this->_readBIFF5CellRangeAddressFixed(substr($subData, $offset, 6));
                        $offset += 6;
                }

                return array(
                        'size' => 2 + 6 * $nm,
                        'cellRangeAddresses' => $cellRangeAddresses,
                );
        }


        private function _readSheetRangeByRefIndex($index)
        {
                if (isset($this->_ref[$index])) {

                        $type = $this->_externalBooks[$this->_ref[$index]['externalBookIndex']]['type'];

                        switch ($type) {
                                case 'internal':
                                        // check if we have a deleted 3d reference
                                        if ($this->_ref[$index]['firstSheetIndex'] == 0xFFFF or $this->_ref[$index]['lastSheetIndex'] == 0xFFFF) {
                                                throw new PHPExcel_Reader_Exception('Deleted sheet reference');
                                        }

                                        // we have normal sheet range (collapsed or uncollapsed)
                                        $firstSheetName = $this->_sheets[$this->_ref[$index]['firstSheetIndex']]['name'];
                                        $lastSheetName = $this->_sheets[$this->_ref[$index]['lastSheetIndex']]['name'];

                                        if ($firstSheetName == $lastSheetName) {
                                                // collapsed sheet range
                                                $sheetRange = $firstSheetName;
                                        } else {
                                                $sheetRange = "$firstSheetName:$lastSheetName";
                                        }

                                        // escape the single-quotes
                                        $sheetRange = str_replace("'", "''", $sheetRange);

                                        // if there are special characters, we need to enclose the range in single-quotes
                                        // todo: check if we have identified the whole set of special characters
                                        // it seems that the following characters are not accepted for sheet names
                                        // and we may assume that they are not present: []*/:\?
                                        if (preg_match("/[ !\"@#£$%&{()}<>=+'|^,;-]/", $sheetRange)) {
                                                $sheetRange = "'$sheetRange'";
                                        }

                                        return $sheetRange;
                                        break;

                                default:
                                        // TODO: external sheet support
                                        throw new PHPExcel_Reader_Exception('Excel5 reader only supports internal sheets in fomulas');
                                        break;
                        }
                }
                return false;
        }


        private static function _readBIFF8ConstantArray($arrayData)
        {
                // offset: 0; size: 1; number of columns decreased by 1
                $nc = ord($arrayData[0]);

                // offset: 1; size: 2; number of rows decreased by 1
                $nr = self::_GetInt2d($arrayData, 1);
                $size = 3; // initialize
                $arrayData = substr($arrayData, 3);

                // offset: 3; size: var; list of ($nc + 1) * ($nr + 1) constant values
                $matrixChunks = array();
                for ($r = 1; $r <= $nr + 1; ++$r) {
                        $items = array();
                        for ($c = 1; $c <= $nc + 1; ++$c) {
                                $constant = self::_readBIFF8Constant($arrayData);
                                $items[] = $constant['value'];
                                $arrayData = substr($arrayData, $constant['size']);
                                $size += $constant['size'];
                        }
                        $matrixChunks[] = implode(',', $items); // looks like e.g. '1,"hello"'
                }
                $matrix = '{' . implode(';', $matrixChunks) . '}';

                return array(
                        'value' => $matrix,
                        'size' => $size,
                );
        }


        private static function _readBIFF8Constant($valueData)
        {
                // offset: 0; size: 1; identifier for type of constant
                $identifier = ord($valueData[0]);

                switch ($identifier) {
                case 0x00: // empty constant (what is this?)
                        $value = '';
                        $size = 9;
                        break;
                case 0x01: // number
                        // offset: 1; size: 8; IEEE 754 floating-point value
                        $value = self::_extractNumber(substr($valueData, 1, 8));
                        $size = 9;
                        break;
                case 0x02: // string value
                        // offset: 1; size: var; Unicode string, 16-bit string length
                        $string = self::_readUnicodeStringLong(substr($valueData, 1));
                        $value = '"' . $string['value'] . '"';
                        $size = 1 + $string['size'];
                        break;
                case 0x04: // boolean
                        // offset: 1; size: 1; 0 = FALSE, 1 = TRUE
                        if (ord($valueData[1])) {
                                $value = 'TRUE';
                        } else {
                                $value = 'FALSE';
                        }
                        $size = 9;
                        break;
                case 0x10: // error code
                        // offset: 1; size: 1; error code
                        $value = self::_mapErrorCode(ord($valueData[1]));
                        $size = 9;
                        break;
                }
                return array(
                        'value' => $value,
                        'size' => $size,
                );
        }


        private static function _readRGB($rgb)
        {
                // offset: 0; size 1; Red component
                $r = ord($rgb{0});

                // offset: 1; size: 1; Green component
                $g = ord($rgb{1});

                // offset: 2; size: 1; Blue component
                $b = ord($rgb{2});

                // HEX notation, e.g. 'FF00FC'
                $rgb = sprintf('%02X%02X%02X', $r, $g, $b);

                return array('rgb' => $rgb);
        }


        private function _readByteStringShort($subData)
        {
                // offset: 0; size: 1; length of the string (character count)
                $ln = ord($subData[0]);

                // offset: 1: size: var; character array (8-bit characters)
                $value = $this->_decodeCodepage(substr($subData, 1, $ln));

                return array(
                        'value' => $value,
                        'size' => 1 + $ln, // size in bytes of data structure
                );
        }


        private function _readByteStringLong($subData)
        {
                // offset: 0; size: 2; length of the string (character count)
                $ln = self::_GetInt2d($subData, 0);

                // offset: 2: size: var; character array (8-bit characters)
                $value = $this->_decodeCodepage(substr($subData, 2));

                //return $string;
                return array(
                        'value' => $value,
                        'size' => 2 + $ln, // size in bytes of data structure
                );
        }


        private static function _readUnicodeStringShort($subData)
        {
                $value = '';

                // offset: 0: size: 1; length of the string (character count)
                $characterCount = ord($subData[0]);

                $string = self::_readUnicodeString(substr($subData, 1), $characterCount);

                // add 1 for the string length
                $string['size'] += 1;

                return $string;
        }


        private static function _readUnicodeStringLong($subData)
        {
                $value = '';

                // offset: 0: size: 2; length of the string (character count)
                $characterCount = self::_GetInt2d($subData, 0);

                $string = self::_readUnicodeString(substr($subData, 2), $characterCount);

                // add 2 for the string length
                $string['size'] += 2;

                return $string;
        }


        private static function _readUnicodeString($subData, $characterCount)
        {
                $value = '';

                // offset: 0: size: 1; option flags

                        // bit: 0; mask: 0x01; character compression (0 = compressed 8-bit, 1 = uncompressed 16-bit)
                        $isCompressed = !((0x01 & ord($subData[0])) >> 0);

                        // bit: 2; mask: 0x04; Asian phonetic settings
                        $hasAsian = (0x04) & ord($subData[0]) >> 2;

                        // bit: 3; mask: 0x08; Rich-Text settings
                        $hasRichText = (0x08) & ord($subData[0]) >> 3;

                // offset: 1: size: var; character array
                // this offset assumes richtext and Asian phonetic settings are off which is generally wrong
                // needs to be fixed
                $value = self::_encodeUTF16(substr($subData, 1, $isCompressed ? $characterCount : 2 * $characterCount), $isCompressed);

                return array(
                        'value' => $value,
                        'size' => $isCompressed ? 1 + $characterCount : 1 + 2 * $characterCount, // the size in bytes including the option flags
                );
        }


        private static function _UTF8toExcelDoubleQuoted($value)
        {
                return '"' . str_replace('"', '""', $value) . '"';
        }


        private static function _extractNumber($data)
        {
                $rknumhigh = self::_GetInt4d($data, 4);
                $rknumlow = self::_GetInt4d($data, 0);
                $sign = ($rknumhigh & 0x80000000) >> 31;
                $exp = (($rknumhigh & 0x7ff00000) >> 20) - 1023;
                $mantissa = (0x100000 | ($rknumhigh & 0x000fffff));
                $mantissalow1 = ($rknumlow & 0x80000000) >> 31;
                $mantissalow2 = ($rknumlow & 0x7fffffff);
                $value = $mantissa / pow( 2 , (20 - $exp));

                if ($mantissalow1 != 0) {
                        $value += 1 / pow (2 , (21 - $exp));
                }

                $value += $mantissalow2 / pow (2 , (52 - $exp));
                if ($sign) {
                        $value *= -1;
                }

                return $value;
        }


        private static function _GetIEEE754($rknum)
        {
                if (($rknum & 0x02) != 0) {
                        $value = $rknum >> 2;
                } else {
                        // changes by mmp, info on IEEE754 encoding from
                        // research.microsoft.com/~hollasch/cgindex/coding/ieeefloat.html
                        // The RK format calls for using only the most significant 30 bits
                        // of the 64 bit floating point value. The other 34 bits are assumed
                        // to be 0 so we use the upper 30 bits of $rknum as follows...
                        $sign = ($rknum & 0x80000000) >> 31;
                        $exp = ($rknum & 0x7ff00000) >> 20;
                        $mantissa = (0x100000 | ($rknum & 0x000ffffc));
                        $value = $mantissa / pow( 2 , (20- ($exp - 1023)));
                        if ($sign) {
                                $value = -1 * $value;
                        }
                        //end of changes by mmp
                }
                if (($rknum & 0x01) != 0) {
                        $value /= 100;
                }
                return $value;
        }


        private static function _encodeUTF16($string, $compressed = '')
        {
                if ($compressed) {
                        $string = self::_uncompressByteString($string);
                }

                return PHPExcel_Shared_String::ConvertEncoding($string, 'UTF-8', 'UTF-16LE');
        }


        private static function _uncompressByteString($string)
        {
                $uncompressedString = '';
                $strLen = strlen($string);
                for ($i = 0; $i < $strLen; ++$i) {
                        $uncompressedString .= $string[$i] . "\0";
                }

                return $uncompressedString;
        }


        private function _decodeCodepage($string)
        {
                return PHPExcel_Shared_String::ConvertEncoding($string, 'UTF-8', $this->_codepage);
        }


        public static function _GetInt2d($data, $pos)
        {
                return ord($data[$pos]) | (ord($data[$pos+1]) << 8);
        }


        public static function _GetInt4d($data, $pos)
        {
                // FIX: represent numbers correctly on 64-bit system
                // http://sourceforge.net/tracker/index.php?func=detail&aid=1487372&group_id=99160&atid=623334
                // Hacked by Andreas Rehm 2006 to ensure correct result of the <<24 block on 32 and 64bit systems
                $_or_24 = ord($data[$pos + 3]);
                if ($_or_24 >= 128) {
                        // negative number
                        $_ord_24 = -abs((256 - $_or_24) << 24);
                } else {
                        $_ord_24 = ($_or_24 & 127) << 24;
                }
                return ord($data[$pos]) | (ord($data[$pos+1]) << 8) | (ord($data[$pos+2]) << 16) | $_ord_24;
        }


        private static function _readColor($color,$palette,$version)
        {
                if ($color <= 0x07 || $color >= 0x40) {
                        // special built-in color
                        return self::_mapBuiltInColor($color);
                } elseif (isset($palette) && isset($palette[$color - 8])) {
                        // palette color, color index 0x08 maps to pallete index 0
                        return $palette[$color - 8];
                } else {
                        // default color table
                        if ($version == self::XLS_BIFF8) {
                                return self::_mapColor($color);
                        } else {
                                // BIFF5
                                return self::_mapColorBIFF5($color);
                        }
                }

                return $color;
        }


        private static function _mapBorderStyle($index)
        {
                switch ($index) {
                        case 0x00: return PHPExcel_Style_Border::BORDER_NONE;
                        case 0x01: return PHPExcel_Style_Border::BORDER_THIN;
                        case 0x02: return PHPExcel_Style_Border::BORDER_MEDIUM;
                        case 0x03: return PHPExcel_Style_Border::BORDER_DASHED;
                        case 0x04: return PHPExcel_Style_Border::BORDER_DOTTED;
                        case 0x05: return PHPExcel_Style_Border::BORDER_THICK;
                        case 0x06: return PHPExcel_Style_Border::BORDER_DOUBLE;
                        case 0x07: return PHPExcel_Style_Border::BORDER_HAIR;
                        case 0x08: return PHPExcel_Style_Border::BORDER_MEDIUMDASHED;
                        case 0x09: return PHPExcel_Style_Border::BORDER_DASHDOT;
                        case 0x0A: return PHPExcel_Style_Border::BORDER_MEDIUMDASHDOT;
                        case 0x0B: return PHPExcel_Style_Border::BORDER_DASHDOTDOT;
                        case 0x0C: return PHPExcel_Style_Border::BORDER_MEDIUMDASHDOTDOT;
                        case 0x0D: return PHPExcel_Style_Border::BORDER_SLANTDASHDOT;
                        default:   return PHPExcel_Style_Border::BORDER_NONE;
                }
        }


        private static function _mapFillPattern($index)
        {
                switch ($index) {
                        case 0x00: return PHPExcel_Style_Fill::FILL_NONE;
                        case 0x01: return PHPExcel_Style_Fill::FILL_SOLID;
                        case 0x02: return PHPExcel_Style_Fill::FILL_PATTERN_MEDIUMGRAY;
                        case 0x03: return PHPExcel_Style_Fill::FILL_PATTERN_DARKGRAY;
                        case 0x04: return PHPExcel_Style_Fill::FILL_PATTERN_LIGHTGRAY;
                        case 0x05: return PHPExcel_Style_Fill::FILL_PATTERN_DARKHORIZONTAL;
                        case 0x06: return PHPExcel_Style_Fill::FILL_PATTERN_DARKVERTICAL;
                        case 0x07: return PHPExcel_Style_Fill::FILL_PATTERN_DARKDOWN;
                        case 0x08: return PHPExcel_Style_Fill::FILL_PATTERN_DARKUP;
                        case 0x09: return PHPExcel_Style_Fill::FILL_PATTERN_DARKGRID;
                        case 0x0A: return PHPExcel_Style_Fill::FILL_PATTERN_DARKTRELLIS;
                        case 0x0B: return PHPExcel_Style_Fill::FILL_PATTERN_LIGHTHORIZONTAL;
                        case 0x0C: return PHPExcel_Style_Fill::FILL_PATTERN_LIGHTVERTICAL;
                        case 0x0D: return PHPExcel_Style_Fill::FILL_PATTERN_LIGHTDOWN;
                        case 0x0E: return PHPExcel_Style_Fill::FILL_PATTERN_LIGHTUP;
                        case 0x0F: return PHPExcel_Style_Fill::FILL_PATTERN_LIGHTGRID;
                        case 0x10: return PHPExcel_Style_Fill::FILL_PATTERN_LIGHTTRELLIS;
                        case 0x11: return PHPExcel_Style_Fill::FILL_PATTERN_GRAY125;
                        case 0x12: return PHPExcel_Style_Fill::FILL_PATTERN_GRAY0625;
                        default:   return PHPExcel_Style_Fill::FILL_NONE;
                }
        }


        private static function _mapErrorCode($subData)
        {
                switch ($subData) {
                        case 0x00: return '#NULL!';             break;
                        case 0x07: return '#DIV/0!';    break;
                        case 0x0F: return '#VALUE!';    break;
                        case 0x17: return '#REF!';              break;
                        case 0x1D: return '#NAME?';             break;
                        case 0x24: return '#NUM!';              break;
                        case 0x2A: return '#N/A';               break;
                        default: return false;
                }
        }


        private static function _mapBuiltInColor($color)
        {
                switch ($color) {
                        case 0x00: return array('rgb' => '000000');
                        case 0x01: return array('rgb' => 'FFFFFF');
                        case 0x02: return array('rgb' => 'FF0000');
                        case 0x03: return array('rgb' => '00FF00');
                        case 0x04: return array('rgb' => '0000FF');
                        case 0x05: return array('rgb' => 'FFFF00');
                        case 0x06: return array('rgb' => 'FF00FF');
                        case 0x07: return array('rgb' => '00FFFF');
                        case 0x40: return array('rgb' => '000000'); // system window text color
                        case 0x41: return array('rgb' => 'FFFFFF'); // system window background color
                        default:   return array('rgb' => '000000');
                }
        }


        private static function _mapColorBIFF5($subData)
        {
                switch ($subData) {
                        case 0x08: return array('rgb' => '000000');
                        case 0x09: return array('rgb' => 'FFFFFF');
                        case 0x0A: return array('rgb' => 'FF0000');
                        case 0x0B: return array('rgb' => '00FF00');
                        case 0x0C: return array('rgb' => '0000FF');
                        case 0x0D: return array('rgb' => 'FFFF00');
                        case 0x0E: return array('rgb' => 'FF00FF');
                        case 0x0F: return array('rgb' => '00FFFF');
                        case 0x10: return array('rgb' => '800000');
                        case 0x11: return array('rgb' => '008000');
                        case 0x12: return array('rgb' => '000080');
                        case 0x13: return array('rgb' => '808000');
                        case 0x14: return array('rgb' => '800080');
                        case 0x15: return array('rgb' => '008080');
                        case 0x16: return array('rgb' => 'C0C0C0');
                        case 0x17: return array('rgb' => '808080');
                        case 0x18: return array('rgb' => '8080FF');
                        case 0x19: return array('rgb' => '802060');
                        case 0x1A: return array('rgb' => 'FFFFC0');
                        case 0x1B: return array('rgb' => 'A0E0F0');
                        case 0x1C: return array('rgb' => '600080');
                        case 0x1D: return array('rgb' => 'FF8080');
                        case 0x1E: return array('rgb' => '0080C0');
                        case 0x1F: return array('rgb' => 'C0C0FF');
                        case 0x20: return array('rgb' => '000080');
                        case 0x21: return array('rgb' => 'FF00FF');
                        case 0x22: return array('rgb' => 'FFFF00');
                        case 0x23: return array('rgb' => '00FFFF');
                        case 0x24: return array('rgb' => '800080');
                        case 0x25: return array('rgb' => '800000');
                        case 0x26: return array('rgb' => '008080');
                        case 0x27: return array('rgb' => '0000FF');
                        case 0x28: return array('rgb' => '00CFFF');
                        case 0x29: return array('rgb' => '69FFFF');
                        case 0x2A: return array('rgb' => 'E0FFE0');
                        case 0x2B: return array('rgb' => 'FFFF80');
                        case 0x2C: return array('rgb' => 'A6CAF0');
                        case 0x2D: return array('rgb' => 'DD9CB3');
                        case 0x2E: return array('rgb' => 'B38FEE');
                        case 0x2F: return array('rgb' => 'E3E3E3');
                        case 0x30: return array('rgb' => '2A6FF9');
                        case 0x31: return array('rgb' => '3FB8CD');
                        case 0x32: return array('rgb' => '488436');
                        case 0x33: return array('rgb' => '958C41');
                        case 0x34: return array('rgb' => '8E5E42');
                        case 0x35: return array('rgb' => 'A0627A');
                        case 0x36: return array('rgb' => '624FAC');
                        case 0x37: return array('rgb' => '969696');
                        case 0x38: return array('rgb' => '1D2FBE');
                        case 0x39: return array('rgb' => '286676');
                        case 0x3A: return array('rgb' => '004500');
                        case 0x3B: return array('rgb' => '453E01');
                        case 0x3C: return array('rgb' => '6A2813');
                        case 0x3D: return array('rgb' => '85396A');
                        case 0x3E: return array('rgb' => '4A3285');
                        case 0x3F: return array('rgb' => '424242');
                        default:   return array('rgb' => '000000');
                }
        }


        private static function _mapColor($subData)
        {
                switch ($subData) {
                        case 0x08: return array('rgb' => '000000');
                        case 0x09: return array('rgb' => 'FFFFFF');
                        case 0x0A: return array('rgb' => 'FF0000');
                        case 0x0B: return array('rgb' => '00FF00');
                        case 0x0C: return array('rgb' => '0000FF');
                        case 0x0D: return array('rgb' => 'FFFF00');
                        case 0x0E: return array('rgb' => 'FF00FF');
                        case 0x0F: return array('rgb' => '00FFFF');
                        case 0x10: return array('rgb' => '800000');
                        case 0x11: return array('rgb' => '008000');
                        case 0x12: return array('rgb' => '000080');
                        case 0x13: return array('rgb' => '808000');
                        case 0x14: return array('rgb' => '800080');
                        case 0x15: return array('rgb' => '008080');
                        case 0x16: return array('rgb' => 'C0C0C0');
                        case 0x17: return array('rgb' => '808080');
                        case 0x18: return array('rgb' => '9999FF');
                        case 0x19: return array('rgb' => '993366');
                        case 0x1A: return array('rgb' => 'FFFFCC');
                        case 0x1B: return array('rgb' => 'CCFFFF');
                        case 0x1C: return array('rgb' => '660066');
                        case 0x1D: return array('rgb' => 'FF8080');
                        case 0x1E: return array('rgb' => '0066CC');
                        case 0x1F: return array('rgb' => 'CCCCFF');
                        case 0x20: return array('rgb' => '000080');
                        case 0x21: return array('rgb' => 'FF00FF');
                        case 0x22: return array('rgb' => 'FFFF00');
                        case 0x23: return array('rgb' => '00FFFF');
                        case 0x24: return array('rgb' => '800080');
                        case 0x25: return array('rgb' => '800000');
                        case 0x26: return array('rgb' => '008080');
                        case 0x27: return array('rgb' => '0000FF');
                        case 0x28: return array('rgb' => '00CCFF');
                        case 0x29: return array('rgb' => 'CCFFFF');
                        case 0x2A: return array('rgb' => 'CCFFCC');
                        case 0x2B: return array('rgb' => 'FFFF99');
                        case 0x2C: return array('rgb' => '99CCFF');
                        case 0x2D: return array('rgb' => 'FF99CC');
                        case 0x2E: return array('rgb' => 'CC99FF');
                        case 0x2F: return array('rgb' => 'FFCC99');
                        case 0x30: return array('rgb' => '3366FF');
                        case 0x31: return array('rgb' => '33CCCC');
                        case 0x32: return array('rgb' => '99CC00');
                        case 0x33: return array('rgb' => 'FFCC00');
                        case 0x34: return array('rgb' => 'FF9900');
                        case 0x35: return array('rgb' => 'FF6600');
                        case 0x36: return array('rgb' => '666699');
                        case 0x37: return array('rgb' => '969696');
                        case 0x38: return array('rgb' => '003366');
                        case 0x39: return array('rgb' => '339966');
                        case 0x3A: return array('rgb' => '003300');
                        case 0x3B: return array('rgb' => '333300');
                        case 0x3C: return array('rgb' => '993300');
                        case 0x3D: return array('rgb' => '993366');
                        case 0x3E: return array('rgb' => '333399');
                        case 0x3F: return array('rgb' => '333333');
                        default:   return array('rgb' => '000000');
                }
        }


        private function _parseRichText($is = '') {
                $value = new PHPExcel_RichText();

                $value->createText($is);

                return $value;
        }

}