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<?php

namespace PhpOffice\PhpSpreadsheet\Reader;

use 
PhpOffice\PhpSpreadsheet\Cell\Coordinate;
use 
PhpOffice\PhpSpreadsheet\Cell\DataType;
use 
PhpOffice\PhpSpreadsheet\Cell\DataValidation;
use 
PhpOffice\PhpSpreadsheet\Exception as PhpSpreadsheetException;
use 
PhpOffice\PhpSpreadsheet\NamedRange;
use 
PhpOffice\PhpSpreadsheet\RichText\RichText;
use 
PhpOffice\PhpSpreadsheet\Shared\CodePage;
use 
PhpOffice\PhpSpreadsheet\Shared\Date;
use 
PhpOffice\PhpSpreadsheet\Shared\Escher;
use 
PhpOffice\PhpSpreadsheet\Shared\Escher\DggContainer\BstoreContainer\BSE;
use 
PhpOffice\PhpSpreadsheet\Shared\File;
use 
PhpOffice\PhpSpreadsheet\Shared\OLE;
use 
PhpOffice\PhpSpreadsheet\Shared\OLERead;
use 
PhpOffice\PhpSpreadsheet\Shared\StringHelper;
use 
PhpOffice\PhpSpreadsheet\Spreadsheet;
use 
PhpOffice\PhpSpreadsheet\Style\Alignment;
use 
PhpOffice\PhpSpreadsheet\Style\Borders;
use 
PhpOffice\PhpSpreadsheet\Style\Font;
use 
PhpOffice\PhpSpreadsheet\Style\NumberFormat;
use 
PhpOffice\PhpSpreadsheet\Style\Protection;
use 
PhpOffice\PhpSpreadsheet\Style\Style;
use 
PhpOffice\PhpSpreadsheet\Worksheet\MemoryDrawing;
use 
PhpOffice\PhpSpreadsheet\Worksheet\PageSetup;
use 
PhpOffice\PhpSpreadsheet\Worksheet\SheetView;
use 
PhpOffice\PhpSpreadsheet\Worksheet\Worksheet;

// 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)
// https://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
class Xls extends BaseReader
{
    
// 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;

    
/**
     * Summary Information stream data.
     *
     * @var string
     */
    
private $summaryInformation;

    
/**
     * Extended Summary Information stream data.
     *
     * @var string
     */
    
private $documentSummaryInformation;

    
/**
     * Workbook stream data. (Includes workbook globals substream as well as sheet substreams).
     *
     * @var string
     */
    
private $data;

    
/**
     * Size in bytes of $this->data.
     *
     * @var int
     */
    
private $dataSize;

    
/**
     * Current position in stream.
     *
     * @var int
     */
    
private $pos;

    
/**
     * Workbook to be returned by the reader.
     *
     * @var Spreadsheet
     */
    
private $spreadsheet;

    
/**
     * Worksheet that is currently being built by the reader.
     *
     * @var Worksheet
     */
    
private $phpSheet;

    
/**
     * BIFF version.
     *
     * @var int
     */
    
private $version;

    
/**
     * Codepage set in the Excel file being read. Only important for BIFF5 (Excel 5.0 - Excel 95)
     * For BIFF8 (Excel 97 - Excel 2003) this will always have the value 'UTF-16LE'.
     *
     * @var string
     */
    
private $codepage;

    
/**
     * Shared formats.
     *
     * @var array
     */
    
private $formats;

    
/**
     * Shared fonts.
     *
     * @var array
     */
    
private $objFonts;

    
/**
     * Color palette.
     *
     * @var array
     */
    
private $palette;

    
/**
     * Worksheets.
     *
     * @var array
     */
    
private $sheets;

    
/**
     * External books.
     *
     * @var array
     */
    
private $externalBooks;

    
/**
     * REF structures. Only applies to BIFF8.
     *
     * @var array
     */
    
private $ref;

    
/**
     * External names.
     *
     * @var array
     */
    
private $externalNames;

    
/**
     * Defined names.
     *
     * @var array
     */
    
private $definedname;

    
/**
     * Shared strings. Only applies to BIFF8.
     *
     * @var array
     */
    
private $sst;

    
/**
     * Panes are frozen? (in sheet currently being read). See WINDOW2 record.
     *
     * @var bool
     */
    
private $frozen;

    
/**
     * Fit printout to number of pages? (in sheet currently being read). See SHEETPR record.
     *
     * @var bool
     */
    
private $isFitToPages;

    
/**
     * Objects. One OBJ record contributes with one entry.
     *
     * @var array
     */
    
private $objs;

    
/**
     * Text Objects. One TXO record corresponds with one entry.
     *
     * @var array
     */
    
private $textObjects;

    
/**
     * Cell Annotations (BIFF8).
     *
     * @var array
     */
    
private $cellNotes;

    
/**
     * The combined MSODRAWINGGROUP data.
     *
     * @var string
     */
    
private $drawingGroupData;

    
/**
     * The combined MSODRAWING data (per sheet).
     *
     * @var string
     */
    
private $drawingData;

    
/**
     * Keep track of XF index.
     *
     * @var int
     */
    
private $xfIndex;

    
/**
     * Mapping of XF index (that is a cell XF) to final index in cellXf collection.
     *
     * @var array
     */
    
private $mapCellXfIndex;

    
/**
     * Mapping of XF index (that is a style XF) to final index in cellStyleXf collection.
     *
     * @var array
     */
    
private $mapCellStyleXfIndex;

    
/**
     * The shared formulas in a sheet. One SHAREDFMLA record contributes with one value.
     *
     * @var array
     */
    
private $sharedFormulas;

    
/**
     * The shared formula parts in a sheet. One FORMULA record contributes with one value if it
     * refers to a shared formula.
     *
     * @var array
     */
    
private $sharedFormulaParts;

    
/**
     * The type of encryption in use.
     *
     * @var int
     */
    
private $encryption 0;

    
/**
     * The position in the stream after which contents are encrypted.
     *
     * @var int
     */
    
private $encryptionStartPos false;

    
/**
     * The current RC4 decryption object.
     *
     * @var Xls\RC4
     */
    
private $rc4Key;

    
/**
     * The position in the stream that the RC4 decryption object was left at.
     *
     * @var int
     */
    
private $rc4Pos 0;

    
/**
     * The current MD5 context state.
     *
     * @var string
     */
    
private $md5Ctxt;

    
/**
     * @var int
     */
    
private $textObjRef;

    
/**
     * @var string
     */
    
private $baseCell;

    
/**
     * Create a new Xls Reader instance.
     */
    
public function __construct()
    {
        
parent::__construct();
    }

    
/**
     * Can the current IReader read the file?
     *
     * @param string $pFilename
     *
     * @return bool
     */
    
public function canRead($pFilename)
    {
        
File::assertFile($pFilename);

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

            
// get excel data
            
$ole->read($pFilename);

            return 
true;
        } catch (
PhpSpreadsheetException $e) {
            return 
false;
        }
    }

    public function 
setCodepage(string $codepage): void
    
{
        if (!
CodePage::validate($codepage)) {
            throw new 
PhpSpreadsheetException('Unknown codepage: ' $codepage);
        }

        
$this->codepage $codepage;
    }

    
/**
     * Reads names of the worksheets from a file, without parsing the whole file to a PhpSpreadsheet object.
     *
     * @param string $pFilename
     *
     * @return array
     */
    
public function listWorksheetNames($pFilename)
    {
        
File::assertFile($pFilename);

        
$worksheetNames = [];

        
// 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 = [];

        
// Parse Workbook Global Substream
        
while ($this->pos $this->dataSize) {
            
$code self::getUInt2d($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;
    }

    
/**
     * Return worksheet info (Name, Last Column Letter, Last Column Index, Total Rows, Total Columns).
     *
     * @param string $pFilename
     *
     * @return array
     */
    
public function listWorksheetInfo($pFilename)
    {
        
File::assertFile($pFilename);

        
$worksheetInfo = [];

        
// 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 = [];

        
// Parse Workbook Global Substream
        
while ($this->pos $this->dataSize) {
            
$code self::getUInt2d($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 = [];
            
$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) {
                
$code self::getUInt2d($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:
                        
$length self::getUInt2d($this->data$this->pos 2);
                        
$recordData $this->readRecordData($this->data$this->pos 4$length);

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

                        
$rowIndex self::getUInt2d($recordData0) + 1;
                        
$columnIndex self::getUInt2d($recordData2);

                        
$tmpInfo['totalRows'] = max($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;
                }
            }

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

            
$worksheetInfo[] = $tmpInfo;
        }

        return 
$worksheetInfo;
    }

    
/**
     * Loads PhpSpreadsheet from file.
     *
     * @param string $pFilename
     *
     * @return Spreadsheet
     */
    
public function load($pFilename)
    {
        
// Read the OLE file
        
$this->loadOLE($pFilename);

        
// Initialisations
        
$this->spreadsheet = new Spreadsheet();
        
$this->spreadsheet->removeSheetByIndex(0); // remove 1st sheet
        
if (!$this->readDataOnly) {
            
$this->spreadsheet->removeCellStyleXfByIndex(0); // remove the default style
            
$this->spreadsheet->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 $this->codepage ?: CodePage::DEFAULT_CODE_PAGE;
        
$this->formats = [];
        
$this->objFonts = [];
        
$this->palette = [];
        
$this->sheets = [];
        
$this->externalBooks = [];
        
$this->ref = [];
        
$this->definedname = [];
        
$this->sst = [];
        
$this->drawingGroupData '';
        
$this->xfIndex '';
        
$this->mapCellXfIndex = [];
        
$this->mapCellStyleXfIndex = [];

        
// Parse Workbook Global Substream
        
while ($this->pos $this->dataSize) {
            
$code self::getUInt2d($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)) {
                    
$color Xls\Color::map($objFont->colorIndex$this->palette$this->version);
                    
$objFont->getColor()->setRGB($color['rgb']);
                }
            }

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

                if (isset(
$fill->startcolorIndex)) {
                    
$startColor Xls\Color::map($fill->startcolorIndex$this->palette$this->version);
                    
$fill->getStartColor()->setRGB($startColor['rgb']);
                }
                if (isset(
$fill->endcolorIndex)) {
                    
$endColor Xls\Color::map($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)) {
                    
$borderTopColor Xls\Color::map($top->colorIndex$this->palette$this->version);
                    
$top->getColor()->setRGB($borderTopColor['rgb']);
                }
                if (isset(
$right->colorIndex)) {
                    
$borderRightColor Xls\Color::map($right->colorIndex$this->palette$this->version);
                    
$right->getColor()->setRGB($borderRightColor['rgb']);
                }
                if (isset(
$bottom->colorIndex)) {
                    
$borderBottomColor Xls\Color::map($bottom->colorIndex$this->palette$this->version);
                    
$bottom->getColor()->setRGB($borderBottomColor['rgb']);
                }
                if (isset(
$left->colorIndex)) {
                    
$borderLeftColor Xls\Color::map($left->colorIndex$this->palette$this->version);
                    
$left->getColor()->setRGB($borderLeftColor['rgb']);
                }
                if (isset(
$diagonal->colorIndex)) {
                    
$borderDiagonalColor Xls\Color::map($diagonal->colorIndex$this->palette$this->version);
                    
$diagonal->getColor()->setRGB($borderDiagonalColor['rgb']);
                }
            }
        }

        
// treat MSODRAWINGGROUP records, workbook-level Escher
        
if (!$this->readDataOnly && $this->drawingGroupData) {
            
$escherWorkbook = new Escher();
            
$reader = new Xls\Escher($escherWorkbook);
            
$escherWorkbook $reader->load($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 PhpSpreadsheet object
            
$this->phpSheet $this->spreadsheet->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'], falsefalse);
            
$this->phpSheet->setSheetState($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 = [];

            
// Initialize shared formula parts
            
$this->sharedFormulaParts = [];

            
// Initialize shared formulas
            
$this->sharedFormulas = [];

            
// Initialize text objs
            
$this->textObjects = [];

            
// Initialize cell annotations
            
$this->cellNotes = [];
            
$this->textObjRef = -1;

            while (
$this->pos <= $this->dataSize 4) {
                
$code self::getUInt2d($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_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 Escher();
                
$reader = new Xls\Escher($escherWorksheet);
                
$escherWorksheet $reader->load($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) {
                
// 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
                    
[$startColumn$startRow] = Coordinate::coordinateFromString($spContainer->getStartCoordinates());
                    [
$endColumn$endRow] = Coordinate::coordinateFromString($spContainer->getEndCoordinates());

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

                    
$width \PhpOffice\PhpSpreadsheet\Shared\Xls::getDistanceX($this->phpSheet$startColumn$startOffsetX$endColumn$endOffsetX);
                    
$height \PhpOffice\PhpSpreadsheet\Shared\Xls::getDistanceY($this->phpSheet$startRow$startOffsetY$endRow$endOffsetY);

                    
// calculate offsetX and offsetY of the shape
                    
$offsetX $startOffsetX \PhpOffice\PhpSpreadsheet\Shared\Xls::sizeCol($this->phpSheet$startColumn) / 1024;
                    
$offsetY $startOffsetY \PhpOffice\PhpSpreadsheet\Shared\Xls::sizeRow($this->phpSheet$startRow) / 256;

                    switch (
$obj['otObjType']) {
                        case 
0x19:
                            
// Note
                            
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:
                            
// picture
                            // get index to BSE entry (1-based)
                            
$BSEindex $spContainer->getOPT(0x0104);

                            
// If there is no BSE Index, we will fail here and other fields are not read.
                            // Fix by checking here.
                            // TODO: Why is there no BSE Index? Is this a new Office Version? Password protected field?
                            // More likely : a uncompatible picture
                            
if (!$BSEindex) {
                                continue 
2;
                            }

                            
$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 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 
BSE::BLIPTYPE_JPEG:
                                        
$drawing->setRenderingFunction(MemoryDrawing::RENDERING_JPEG);
                                        
$drawing->setMimeType(MemoryDrawing::MIMETYPE_JPEG);

                                        break;
                                    case 
BSE::BLIPTYPE_PNG:
                                        
$drawing->setRenderingFunction(MemoryDrawing::RENDERING_PNG);
                                        
$drawing->setMimeType(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) {
                    [
$column$row] = Coordinate::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('=' $formulaDataType::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'] = '';
                        }
                    }
                    
$cellAddress str_replace('$'''$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 = [];
                        foreach (
$ranges as $range) {
                            
// $range should look like one of these
                            //        Foo!$C$7:$J$66
                            //        Bar!$A$1:$IV$2
                            
$explodes Worksheet::extractSheetTitle($rangetrue);
                            
$sheetName trim($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 $this->spreadsheet->getSheetByName($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
                            
if (strpos($range'!') !== false) {
                                
$explodes Worksheet::extractSheetTitle($rangetrue);
                                if (
$docSheet $this->spreadsheet->getSheetByName($explodes[0])) {
                                    
$extractedRange $explodes[1];
                                    
$extractedRange str_replace('$'''$extractedRange);

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

                                        if (
$firstColumn == 'A' && $lastColumn == 'IV') {
                                            
// then we have repeating rows
                                            
$docSheet->getPageSetup()->setRowsToRepeatAtTop([$firstRow$lastRow]);
                                        } elseif (
$firstRow == && $lastRow == 65536) {
                                            
// then we have repeating columns
                                            
$docSheet->getPageSetup()->setColumnsToRepeatAtLeft([$firstColumn$lastColumn]);
                                        }
                                    }
                                }
                            }
                        }

                        break;
                }
            } else {
                
// Extract range
                
if (strpos($definedName['formula'], '!') !== false) {
                    
$explodes Worksheet::extractSheetTitle($definedName['formula'], true);
                    if (
                        (
$docSheet $this->spreadsheet->getSheetByName($explodes[0])) ||
                        (
$docSheet $this->spreadsheet->getSheetByName(trim($explodes[0], "'")))
                    ) {
                        
$extractedRange $explodes[1];
                        
$extractedRange str_replace('$'''$extractedRange);

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

                        
$scope = ($definedName['scope'] == 0) ? null $this->spreadsheet->getSheetByName($this->sheets[$definedName['scope'] - 1]['name']);

                        
$this->spreadsheet->addNamedRange(new NamedRange((string) $definedName['name'], $docSheet$extractedRange$localOnly$scope));
                    }
                }
                
//    Named Value
                    //    TODO Provide support for named values
            
}
        }
        
$this->data null;

        return 
$this->spreadsheet;
    }

    
/**
     * Read record data from stream, decrypting as required.
     *
     * @param string $data Data stream to read from
     * @param int $pos Position to start reading from
     * @param int $len Record data length
     *
     * @return string Record data
     */
    
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 .= $this->rc4Key->RC4(substr($data0$step));
                
$data substr($data$step);
                
$pos += $step;
                
$len -= $step;
                ++
$block;
                
$this->rc4Key $this->makeKey($block$this->md5Ctxt);
            }
            
$recordData .= $this->rc4Key->RC4(substr($data0$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 
Exception('XOr encryption not supported');
        }

        return 
$recordData;
    }

    
/**
     * Use OLE reader to extract the relevant data streams from the OLE file.
     *
     * @param string $pFilename
     */
    
private function loadOLE($pFilename): void
    
{
        
// OLE reader
        
$ole = new OLERead();
        
// get excel data,
        
$ole->read($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);
    }

    
/**
     * Read summary information.
     */
    
private function readSummaryInformation(): void
    
{
        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->summaryInformation24);

        
// 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->summaryInformation44);

        
// 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, ($secOffset 8) + ($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, ($secOffset 12) + ($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
                    
$value self::getUInt2d($this->summaryInformation$secOffset $offset);

                    break;
                case 
0x03// 4 byte signed integer
                    
$value self::getInt4d($this->summaryInformation$secOffset $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 $offset);
                    
$value substr($this->summaryInformation$secOffset $offset$byteLength);
                    
$value StringHelper::convertEncoding($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
                    
$value OLE::OLE2LocalDate(substr($this->summaryInformation$secOffset $offset8));

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

            switch (
$id) {
                case 
0x01:    //    Code Page
                    
$codePage CodePage::numberToName($value);

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

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

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

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

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

                    break;
                case 
0x07:    //    Template
                    //    Not supported by PhpSpreadsheet
                    
break;
                case 
0x08:    //    Last Saved By (LastModifiedBy)
                    
$this->spreadsheet->getProperties()->setLastModifiedBy($value);

                    break;
                case 
0x09:    //    Revision
                    //    Not supported by PhpSpreadsheet
                    
break;
                case 
0x0A:    //    Total Editing Time
                    //    Not supported by PhpSpreadsheet
                    
break;
                case 
0x0B:    //    Last Printed
                    //    Not supported by PhpSpreadsheet
                    
break;
                case 
0x0C:    //    Created Date/Time
                    
$this->spreadsheet->getProperties()->setCreated($value);

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

                    break;
                case 
0x0E:    //    Number of Pages
                    //    Not supported by PhpSpreadsheet
                    
break;
                case 
0x0F:    //    Number of Words
                    //    Not supported by PhpSpreadsheet
                    
break;
                case 
0x10:    //    Number of Characters
                    //    Not supported by PhpSpreadsheet
                    
break;
                case 
0x11:    //    Thumbnail
                    //    Not supported by PhpSpreadsheet
                    
break;
                case 
0x12:    //    Name of creating application
                    //    Not supported by PhpSpreadsheet
                    
break;
                case 
0x13:    //    Security
                    //    Not supported by PhpSpreadsheet
                    
break;
            }
        }
    }

    
/**
     * Read additional document summary information.
     */
    
private function readDocumentSummaryInformation(): void
    
{
        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->documentSummaryInformation24);

        
// 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->documentSummaryInformation44);

        
//    section header
        //    offset: $secOffset;    size: 4;    section length
        
$secLength self::getInt4d($this->documentSummaryInformation$secOffset);

        
//    offset: $secOffset+4;    size: 4;    property count
        
$countProperties self::getInt4d($this->documentSummaryInformation$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->documentSummaryInformation, ($secOffset 8) + ($i));

            
// Use value of property id as appropriate
            // offset: 60 + 8 * $i;    size: 4;    offset from beginning of section (48)
            
$offset self::getInt4d($this->documentSummaryInformation, ($secOffset 12) + ($i));

            
$type self::getInt4d($this->documentSummaryInformation$secOffset $offset);

            
// initialize property value
            
$value null;

            
// extract property value based on property type
            
switch ($type) {
                case 
0x02:    //    2 byte signed integer
                    
$value self::getUInt2d($this->documentSummaryInformation$secOffset $offset);

                    break;
                case 
0x03:    //    4 byte signed integer
                    
$value self::getInt4d($this->documentSummaryInformation$secOffset $offset);

                    break;
                case 
0x0B:  // Boolean
                    
$value self::getUInt2d($this->documentSummaryInformation$secOffset $offset);
                    
$value = ($value == 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 $offset);
                    
$value substr($this->documentSummaryInformation$secOffset $offset$byteLength);
                    
$value StringHelper::convertEncoding($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
                    
$value OLE::OLE2LocalDate(substr($this->documentSummaryInformation$secOffset $offset8));

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

            switch (
$id) {
                case 
0x01:    //    Code Page
                    
$codePage CodePage::numberToName($value);

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

                    break;
                case 
0x03:    //    Presentation Target
                    //    Not supported by PhpSpreadsheet
                    
break;
                case 
0x04:    //    Bytes
                    //    Not supported by PhpSpreadsheet
                    
break;
                case 
0x05:    //    Lines
                    //    Not supported by PhpSpreadsheet
                    
break;
                case 
0x06:    //    Paragraphs
                    //    Not supported by PhpSpreadsheet
                    
break;
                case 
0x07:    //    Slides
                    //    Not supported by PhpSpreadsheet
                    
break;
                case 
0x08:    //    Notes
                    //    Not supported by PhpSpreadsheet
                    
break;
                case 
0x09:    //    Hidden Slides
                    //    Not supported by PhpSpreadsheet
                    
break;
                case 
0x0A:    //    MM Clips
                    //    Not supported by PhpSpreadsheet
                    
break;
                case 
0x0B:    //    Scale Crop
                    //    Not supported by PhpSpreadsheet
                    
break;
                case 
0x0C:    //    Heading Pairs
                    //    Not supported by PhpSpreadsheet
                    
break;
                case 
0x0D:    //    Titles of Parts
                    //    Not supported by PhpSpreadsheet
                    
break;
                case 
0x0E:    //    Manager
                    
$this->spreadsheet->getProperties()->setManager($value);

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

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

    
/**
     * Reads a general type of BIFF record. Does nothing except for moving stream pointer forward to next record.
     */
    
private function readDefault(): void
    
{
        
$length self::getUInt2d($this->data$this->pos 2);

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

    
/**
     *    The NOTE record specifies a comment associated with a particular cell. In Excel 95 (BIFF7) and earlier versions,
     *        this record stores a note (cell note). This feature was significantly enhanced in Excel 97.
     */
    
private function readNote(): void
    
{
        
$length self::getUInt2d($this->data$this->pos 2);
        
$recordData $this->readRecordData($this->data$this->pos 4$length);

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

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

        
$cellAddress $this->readBIFF8CellAddress(substr($recordData04));
        if (
$this->version == self::XLS_BIFF8) {
            
$noteObjID self::getUInt2d($recordData6);
            
$noteAuthor self::readUnicodeStringLong(substr($recordData8));
            
$noteAuthor $noteAuthor['value'];
            
$this->cellNotes[$noteObjID] = [
                
'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.
                
$row self::getUInt2d($recordData0);
                
$extension true;
                
$cellAddress array_pop(array_keys($this->phpSheet->getComments()));
            }

            
$cellAddress str_replace('$'''$cellAddress);
            
$noteLength self::getUInt2d($recordData4);
            
$noteText trim(substr($recordData6));

            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)->setText($this->parseRichText($noteText));
//                                                    ->setAuthor($author)
            
}
        }
    }

    
/**
     * The TEXT Object record contains the text associated with a cell annotation.
     */
    
private function readTextObject(): void
    
{
        
$length self::getUInt2d($this->data$this->pos 2);
        
$recordData $this->readRecordData($this->data$this->pos 4$length);

        
// move stream pointer to next record
        
$this->pos += $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
        
$grbitOpts self::getUInt2d($recordData0);
        
$rot self::getUInt2d($recordData2);
        
$cchText self::getUInt2d($recordData10);
        
$cbRuns self::getUInt2d($recordData12);
        
$text $this->getSplicedRecordData();

        
$textByte $text['spliceOffsets'][1] - $text['spliceOffsets'][0] - 1;
        
$textStr substr($text['recordData'], $text['spliceOffsets'][0] + 1$textByte);
        
// get 1 byte
        
$is16Bit ord($text['recordData'][0]);
        
// it is possible to use a compressed format,
        // which omits the high bytes of all characters, if they are all zero
        
if (($is16Bit 0x01) === 0) {
            
$textStr StringHelper::ConvertEncoding($textStr'UTF-8''ISO-8859-1');
        } else {
            
$textStr $this->decodeCodepage($textStr);
        }

        
$this->textObjects[$this->textObjRef] = [
            
'text' => $textStr,
            
'format' => substr($text['recordData'], $text['spliceOffsets'][1], $cbRuns),
            
'alignment' => $grbitOpts,
            
'rotation' => $rot,
        ];
    }

    
/**
     * Read BOF.
     */
    
private function readBof(): void
    
{
        
$length self::getUInt2d($this->data$this->pos 2);
        
$recordData substr($this->data$this->pos 4$length);

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

        
// offset: 2; size: 2; type of the following data
        
$substreamType self::getUInt2d($recordData2);

        switch (
$substreamType) {
            case 
self::XLS_WORKBOOKGLOBALS:
                
$version self::getUInt2d($recordData0);
                if ((
$version != self::XLS_BIFF8) && ($version != self::XLS_BIFF7)) {
                    throw new 
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 {
                    
$code self::getUInt2d($this->data$this->pos);
                    
$this->readDefault();
                } while (
$code != self::XLS_TYPE_EOF && $this->pos $this->dataSize);

                break;
        }
    }

    
/**
     * FILEPASS.
     *
     * This record is part of the File Protection Block. It
     * contains information about the read/write password of the
     * file. All record contents following this record will be
     * encrypted.
     *
     * --    "OpenOffice.org's Documentation of the Microsoft
     *         Excel File Format"
     *
     * The decryption functions and objects used from here on in
     * are based on the source of Spreadsheet-ParseExcel:
     * https://metacpan.org/release/Spreadsheet-ParseExcel
     */
    
private function readFilepass(): void
    
{
        
$length self::getUInt2d($this->data$this->pos 2);

        if (
$length != 54) {
            throw new 
Exception('Unexpected file pass record length');
        }

        
$recordData $this->readRecordData($this->data$this->pos 4$length);

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

        if (!
$this->verifyPassword('VelvetSweatshop'substr($recordData616), substr($recordData2216), substr($recordData3816), $this->md5Ctxt)) {
            throw new 
Exception('Decryption password incorrect');
        }

        
$this->encryption self::MS_BIFF_CRYPTO_RC4;

        
// Decryption required from the record after next onwards
        
$this->encryptionStartPos $this->pos self::getUInt2d($this->data$this->pos 2);
    }

    
/**
     * Make an RC4 decryptor for the given block.
     *
     * @param int $block Block for which to create decrypto
     * @param string $valContext MD5 context state
     *
     * @return Xls\RC4
     */
    
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 Xls\MD5();
        
$md5->add($pwarray);

        
$s $md5->getContext();

        return new 
Xls\RC4($s);
    }

    
/**
     * Verify RC4 file password.
     *
     * @param string $password Password to check
     * @param string $docid Document id
     * @param string $salt_data Salt data
     * @param string $hashedsalt_data Hashed salt data
     * @param string $valContext Set to the MD5 context of the value
     *
     * @return bool Success
     */
    
private function verifyPassword($password$docid$salt_data$hashedsalt_data, &$valContext)
    {
        
$pwarray str_repeat("\0"64);

        
$iMax strlen($password);
        for (
$i 0$i $iMax; ++$i) {
            
$o ord(substr($password$i1));
            
$pwarray[$i] = chr($o 0xff);
            
$pwarray[$i 1] = chr(($o >> 8) & 0xff);
        }
        
$pwarray[$i] = chr(0x80);
        
$pwarray[56] = chr(($i << 4) & 0xff);

        
$md5 = new Xls\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 $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;
    }

    
/**
     * CODEPAGE.
     *
     * This record stores the text encoding used to write byte
     * strings, stored as MS Windows code page identifier.
     *
     * --    "OpenOffice.org's Documentation of the Microsoft
     *         Excel File Format"
     */
    
private function readCodepage(): void
    
{
        
$length self::getUInt2d($this->data$this->pos 2);
        
$recordData $this->readRecordData($this->data$this->pos 4$length);

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

        
// offset: 0; size: 2; code page identifier
        
$codepage self::getUInt2d($recordData0);

        
$this->codepage CodePage::numberToName($codepage);
    }

    
/**
     * DATEMODE.
     *
     * This record specifies the base date for displaying date
     * values. All dates are stored as count of days past this
     * base date. In BIFF2-BIFF4 this record is part of the
     * Calculation Settings Block. In BIFF5-BIFF8 it is
     * stored in the Workbook Globals Substream.
     *
     * --    "OpenOffice.org's Documentation of the Microsoft
     *         Excel File Format"
     */
    
private function readDateMode(): void
    
{
        
$length self::getUInt2d($this->data$this->pos 2);
        
$recordData $this->readRecordData($this->data$this->pos 4$length);

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

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

    
/**
     * Read a FONT record.
     */
    
private function readFont(): void
    
{
        
$length self::getUInt2d($this->data$this->pos 2);
        
$recordData $this->readRecordData($this->data$this->pos 4$length);

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

        if (!
$this->readDataOnly) {
            
$objFont = new Font();

            
// offset: 0; size: 2; height of the font (in twips = 1/20 of a point)
            
$size self::getUInt2d($recordData0);
            
$objFont->setSize($size 20);

            
// offset: 2; size: 2; option flags
            // bit: 0; mask 0x0001; bold (redundant in BIFF5-BIFF8)
            // bit: 1; mask 0x0002; italic
            
$isItalic = (0x0002 self::getUInt2d($recordData2)) >> 1;
            if (
$isItalic) {
                
$objFont->setItalic(true);
            }

            
// bit: 2; mask 0x0004; underlined (redundant in BIFF5-BIFF8)
            // bit: 3; mask 0x0008; strikethrough
            
$isStrike = (0x0008 self::getUInt2d($recordData2)) >> 3;
            if (
$isStrike) {
                
$objFont->setStrikethrough(true);
            }

            
// offset: 4; size: 2; colour index
            
$colorIndex self::getUInt2d($recordData4);
            
$objFont->colorIndex $colorIndex;

            
// offset: 6; size: 2; font weight
            
$weight self::getUInt2d($recordData6);
            switch (
$weight) {
                case 
0x02BC:
                    
$objFont->setBold(true);

                    break;
            }

            
// offset: 8; size: 2; escapement type
            
$escapement self::getUInt2d($recordData8);
            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(Font::UNDERLINE_SINGLE);

                    break;
                case 
0x02:
                    
$objFont->setUnderline(Font::UNDERLINE_DOUBLE);

                    break;
                case 
0x21:
                    
$objFont->setUnderline(Font::UNDERLINE_SINGLEACCOUNTING);

                    break;
                case 
0x22:
                    
$objFont->setUnderline(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) {
                
$string self::readUnicodeStringShort(substr($recordData14));
            } else {
                
$string $this->readByteStringShort(substr($recordData14));
            }
            
$objFont->setName($string['value']);

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

    
/**
     * FORMAT.
     *
     * This record contains information about a number format.
     * All FORMAT records occur together in a sequential list.
     *
     * In BIFF2-BIFF4 other records referencing a FORMAT record
     * contain a zero-based index into this list. From BIFF5 on
     * the FORMAT record contains the index itself that will be
     * used by other records.
     *
     * --    "OpenOffice.org's Documentation of the Microsoft
     *         Excel File Format"
     */
    
private function readFormat(): void
    
{
        
$length self::getUInt2d($this->data$this->pos 2);
        
$recordData $this->readRecordData($this->data$this->pos 4$length);

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

        if (!
$this->readDataOnly) {
            
$indexCode self::getUInt2d($recordData0);

            if (
$this->version == self::XLS_BIFF8) {
                
$string self::readUnicodeStringLong(substr($recordData2));
            } else {
                
// BIFF7
                
$string $this->readByteStringShort(substr($recordData2));
            }

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

    
/**
     * XF - Extended Format.
     *
     * This record contains formatting information for cells, rows, columns or styles.
     * According to https://support.microsoft.com/en-us/help/147732 there are always at least 15 cell style XF
     * and 1 cell XF.
     * Inspection of Excel files generated by MS Office Excel shows that XF records 0-14 are cell style XF
     * and XF record 15 is a cell XF
     * We only read the first cell style XF and skip the remaining cell style XF records
     * We read all cell XF records.
     *
     * --    "OpenOffice.org's Documentation of the Microsoft
     *         Excel File Format"
     */
    
private function readXf(): void
    
{
        
$length self::getUInt2d($this->data$this->pos 2);
        
$recordData $this->readRecordData($this->data$this->pos 4$length);

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

        
$objStyle = new Style();

        if (!
$this->readDataOnly) {
            
// offset:  0; size: 2; Index to FONT record
            
if (self::getUInt2d($recordData0) < 4) {
                
$fontIndex self::getUInt2d($recordData0);
            } 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
                
$fontIndex self::getUInt2d($recordData0) - 1;
            }
            
$objStyle->setFont($this->objFonts[$fontIndex]);

            
// offset:  2; size: 2; Index to FORMAT record
            
$numberFormatIndex self::getUInt2d($recordData2);
            if (isset(
$this->formats[$numberFormatIndex])) {
                
// then we have user-defined format code
                
$numberFormat = ['formatCode' => $this->formats[$numberFormatIndex]];
            } elseif ((
$code NumberFormat::builtInFormatCode($numberFormatIndex)) !== '') {
                
// then we have built-in format code
                
$numberFormat = ['formatCode' => $code];
            } else {
                
// we set the general format code
                
$numberFormat = ['formatCode' => 'General'];
            }
            
$objStyle->getNumberFormat()->setFormatCode($numberFormat['formatCode']);

            
// offset:  4; size: 2; XF type, cell protection, and parent style XF
            // bit 2-0; mask 0x0007; XF_TYPE_PROT
            
$xfTypeProt self::getUInt2d($recordData4);
            
// bit 0; mask 0x01; 1 = cell is locked
            
$isLocked = (0x01 $xfTypeProt) >> 0;
            
$objStyle->getProtection()->setLocked($isLocked Protection::PROTECTION_INHERIT Protection::PROTECTION_UNPROTECTED);

            
// bit 1; mask 0x02; 1 = Formula is hidden
            
$isHidden = (0x02 $xfTypeProt) >> 1;
            
$objStyle->getProtection()->setHidden($isHidden Protection::PROTECTION_PROTECTED 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(Alignment::HORIZONTAL_GENERAL);

                    break;
                case 
1:
                    
$objStyle->getAlignment()->setHorizontal(Alignment::HORIZONTAL_LEFT);

                    break;
                case 
2:
                    
$objStyle->getAlignment()->setHorizontal(Alignment::HORIZONTAL_CENTER);

                    break;
                case 
3:
                    
$objStyle->getAlignment()->setHorizontal(Alignment::HORIZONTAL_RIGHT);

                    break;
                case 
4:
                    
$objStyle->getAlignment()->setHorizontal(Alignment::HORIZONTAL_FILL);

                    break;
                case 
5:
                    
$objStyle->getAlignment()->setHorizontal(Alignment::HORIZONTAL_JUSTIFY);

                    break;
                case 
6:
                    
$objStyle->getAlignment()->setHorizontal(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(Alignment::VERTICAL_TOP);

                    break;
                case 
1:
                    
$objStyle->getAlignment()->setVertical(Alignment::VERTICAL_CENTER);

                    break;
                case 
2:
                    
$objStyle->getAlignment()->setVertical(Alignment::VERTICAL_BOTTOM);

                    break;
                case 
3:
                    
$objStyle->getAlignment()->setVertical(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;
                } elseif (
$angle <= 180) {
                    
$rotation 90 $angle;
                } elseif (
$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 ($bordersLeftStyle Xls\Style\Border::lookup((0x0000000F self::getInt4d($recordData10)) >> 0)) {
                    
$objStyle->getBorders()->getLeft()->setBorderStyle($bordersLeftStyle);
                }
                
// bit: 7-4; mask: 0x000000F0; right style
                
if ($bordersRightStyle Xls\Style\Border::lookup((0x000000F0 self::getInt4d($recordData10)) >> 4)) {
                    
$objStyle->getBorders()->getRight()->setBorderStyle($bordersRightStyle);
                }
                
// bit: 11-8; mask: 0x00000F00; top style
                
if ($bordersTopStyle Xls\Style\Border::lookup((0x00000F00 self::getInt4d($recordData10)) >> 8)) {
                    
$objStyle->getBorders()->getTop()->setBorderStyle($bordersTopStyle);
                }
                
// bit: 15-12; mask: 0x0000F000; bottom style
                
if ($bordersBottomStyle Xls\Style\Border::lookup((0x0000F000 self::getInt4d($recordData10)) >> 12)) {
                    
$objStyle->getBorders()->getBottom()->setBorderStyle($bordersBottomStyle);
                }
                
// bit: 22-16; mask: 0x007F0000; left color
                
$objStyle->getBorders()->getLeft()->colorIndex = (0x007F0000 self::getInt4d($recordData10)) >> 16;

                
// bit: 29-23; mask: 0x3F800000; right color
                
$objStyle->getBorders()->getRight()->colorIndex = (0x3F800000 self::getInt4d($recordData10)) >> 23;

                
// bit: 30; mask: 0x40000000; 1 = diagonal line from top left to right bottom
                
$diagonalDown = (0x40000000 self::getInt4d($recordData10)) >> 30 true false;

                
// bit: 31; mask: 0x80000000; 1 = diagonal line from bottom left to top right
                
$diagonalUp = (0x80000000 self::getInt4d($recordData10)) >> 31 true false;

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

                
// offset: 14; size: 4;
                // bit: 6-0; mask: 0x0000007F; top color
                
$objStyle->getBorders()->getTop()->colorIndex = (0x0000007F self::getInt4d($recordData14)) >> 0;

                
// bit: 13-7; mask: 0x00003F80; bottom color
                
$objStyle->getBorders()->getBottom()->colorIndex = (0x00003F80 self::getInt4d($recordData14)) >> 7;

                
// bit: 20-14; mask: 0x001FC000; diagonal color
                
$objStyle->getBorders()->getDiagonal()->colorIndex = (0x001FC000 self::getInt4d($recordData14)) >> 14;

                
// bit: 24-21; mask: 0x01E00000; diagonal style
                
if ($bordersDiagonalStyle Xls\Style\Border::lookup((0x01E00000 self::getInt4d($recordData14)) >> 21)) {
                    
$objStyle->getBorders()->getDiagonal()->setBorderStyle($bordersDiagonalStyle);
                }

                
// bit: 31-26; mask: 0xFC000000 fill pattern
                
if ($fillType Xls\Style\FillPattern::lookup((0xFC000000 self::getInt4d($recordData14)) >> 26)) {
                    
$objStyle->getFill()->setFillType($fillType);
                }
                
// offset: 18; size: 2; pattern and background colour
                // bit: 6-0; mask: 0x007F; color index for pattern color
                
$objStyle->getFill()->startcolorIndex = (0x007F self::getUInt2d($recordData18)) >> 0;

                
// bit: 13-7; mask: 0x3F80; color index for pattern background
                
$objStyle->getFill()->endcolorIndex = (0x3F80 self::getUInt2d($recordData18)) >> 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
                
$borderAndBackground self::getInt4d($recordData8);

                
// 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(Xls\Style\FillPattern::lookup((0x003F0000 $borderAndBackground) >> 16));

                
// bit: 24-22; mask: 0x01C00000; bottom line style
                
$objStyle->getBorders()->getBottom()->setBorderStyle(Xls\Style\Border::lookup((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
                
$borderLines self::getInt4d($recordData12);

                
// bit: 2-0; mask: 0x00000007; top line style
                
$objStyle->getBorders()->getTop()->setBorderStyle(Xls\Style\Border::lookup((0x00000007 $borderLines) >> 0));

                
// bit: 5-3; mask: 0x00000038; left line style
                
$objStyle->getBorders()->getLeft()->setBorderStyle(Xls\Style\Border::lookup((0x00000038 $borderLines) >> 3));

                
// bit: 8-6; mask: 0x000001C0; right line style
                
$objStyle->getBorders()->getRight()->setBorderStyle(Xls\Style\Border::lookup((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) {
                    
$this->spreadsheet->addCellStyleXf($objStyle);
                    
$this->mapCellStyleXfIndex[$this->xfIndex] = 0;
                }
            } else {
                
// we read all cell XF records
                
$this->spreadsheet->addCellXf($objStyle);
                
$this->mapCellXfIndex[$this->xfIndex] = count($this->spreadsheet->getCellXfCollection()) - 1;
            }

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

    private function 
readXfExt(): void
    
{
        
$length self::getUInt2d($this->data$this->pos 2);
        
$recordData $this->readRecordData($this->data$this->pos 4$length);

        
// move stream pointer to next record
        
$this->pos += $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
            
$ixfe self::getUInt2d($recordData14);

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

            // offset: 18; size: 2; number of extension properties that follow
            
$cexts self::getUInt2d($recordData18);

            
// start reading the actual extension data
            
$offset 20;
            while (
$offset $length) {
                
// extension type
                
$extType self::getUInt2d($recordData$offset);

                
// extension length
                
$cb self::getUInt2d($recordData$offset 2);

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

                switch (
$extType) {
                    case 
4:        // fill start color
                        
$xclfType self::getUInt2d($extData0); // color type
                        
$xclrValue substr($extData44); // 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 $this->spreadsheet->getCellXfByIndex($this->mapCellXfIndex[$ixfe])->getFill();
                                
$fill->getStartColor()->setRGB($rgb);
                                
$fill->startcolorIndex null// normal color index does not apply, discard
                            
}
                        }

                        break;
                    case 
5:        // fill end color
                        
$xclfType self::getUInt2d($extData0); // color type
                        
$xclrValue substr($extData44); // 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 $this->spreadsheet->getCellXfByIndex($this->mapCellXfIndex[$ixfe])->getFill();
                                
$fill->getEndColor()->setRGB($rgb);
                                
$fill->endcolorIndex null// normal color index does not apply, discard
                            
}
                        }

                        break;
                    case 
7:        // border color top
                        
$xclfType self::getUInt2d($extData0); // color type
                        
$xclrValue substr($extData44); // 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 $this->spreadsheet->getCellXfByIndex($this->mapCellXfIndex[$ixfe])->getBorders()->getTop();
                                
$top->getColor()->setRGB($rgb);
                                
$top->colorIndex null// normal color index does not apply, discard
                            
}
                        }

                        break;
                    case 
8:        // border color bottom
                        
$xclfType self::getUInt2d($extData0); // color type
                        
$xclrValue substr($extData44); // 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 $this->spreadsheet->getCellXfByIndex($this->mapCellXfIndex[$ixfe])->getBorders()->getBottom();
                                
$bottom->getColor()->setRGB($rgb);
                                
$bottom->colorIndex null// normal color index does not apply, discard
                            
}
                        }

                        break;
                    case 
9:        // border color left
                        
$xclfType self::getUInt2d($extData0); // color type
                        
$xclrValue substr($extData44); // 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 $this->spreadsheet->getCellXfByIndex($this->mapCellXfIndex[$ixfe])->getBorders()->getLeft();
                                
$left->getColor()->setRGB($rgb);
                                
$left->colorIndex null// normal color index does not apply, discard
                            
}
                        }

                        break;
                    case 
10:        // border color right
                        
$xclfType self::getUInt2d($extData0); // color type
                        
$xclrValue substr($extData44); // 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 $this->spreadsheet->getCellXfByIndex($this->mapCellXfIndex[$ixfe])->getBorders()->getRight();
                                
$right->getColor()->setRGB($rgb);
                                
$right->colorIndex null// normal color index does not apply, discard
                            
}
                        }

                        break;
                    case 
11:        // border color diagonal
                        
$xclfType self::getUInt2d($extData0); // color type
                        
$xclrValue substr($extData44); // 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 $this->spreadsheet->getCellXfByIndex($this->mapCellXfIndex[$ixfe])->getBorders()->getDiagonal();
                                
$diagonal->getColor()->setRGB($rgb);
                                
$diagonal->colorIndex null// normal color index does not apply, discard
                            
}
                        }

                        break;
                    case 
13:    // font color
                        
$xclfType self::getUInt2d($extData0); // color type
                        
$xclrValue substr($extData44); // 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 $this->spreadsheet->getCellXfByIndex($this->mapCellXfIndex[$ixfe])->getFont();
                                
$font->getColor()->setRGB($rgb);
                                
$font->colorIndex null// normal color index does not apply, discard
                            
}
                        }

                        break;
                }

                
$offset += $cb;
            }
        }
    }

    
/**
     * Read STYLE record.
     */
    
private function readStyle(): void
    
{
        
$length self::getUInt2d($this->data$this->pos 2);
        
$recordData $this->readRecordData($this->data$this->pos 4$length);

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

        if (!
$this->readDataOnly) {
            
// offset: 0; size: 2; index to XF record and flag for built-in style
            
$ixfe self::getUInt2d($recordData0);

            
// 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;
                }
            }
            
// user-defined; not supported by PhpSpreadsheet
        
}
    }

    
/**
     * Read PALETTE record.
     */
    
private function readPalette(): void
    
{
        
$length self::getUInt2d($this->data$this->pos 2);
        
$recordData $this->readRecordData($this->data$this->pos 4$length);

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

        if (!
$this->readDataOnly) {
            
// offset: 0; size: 2; number of following colors
            
$nm self::getUInt2d($recordData0);

            
// list of RGB colors
            
for ($i 0$i $nm; ++$i) {
                
$rgb substr($recordData$i4);
                
$this->palette[] = self::readRGB($rgb);
            }
        }
    }

    
/**
     * SHEET.
     *
     * This record is  located in the  Workbook Globals
     * Substream  and represents a sheet inside the workbook.
     * One SHEET record is written for each sheet. It stores the
     * sheet name and a stream offset to the BOF record of the
     * respective Sheet Substream within the Workbook Stream.
     *
     * --    "OpenOffice.org's Documentation of the Microsoft
     *         Excel File Format"
     */
    
private function readSheet(): void
    
{
        
$length self::getUInt2d($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 += $length;

        
// offset: 4; size: 1; sheet state
        
switch (ord($recordData[4])) {
            case 
0x00:
                
$sheetState Worksheet::SHEETSTATE_VISIBLE;

                break;
            case 
0x01:
                
$sheetState Worksheet::SHEETSTATE_HIDDEN;

                break;
            case 
0x02:
                
$sheetState Worksheet::SHEETSTATE_VERYHIDDEN;

                break;
            default:
                
$sheetState 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) {
            
$string self::readUnicodeStringShort(substr($recordData6));
            
$rec_name $string['value'];
        } elseif (
$this->version == self::XLS_BIFF7) {
            
$string $this->readByteStringShort(substr($recordData6));
            
$rec_name $string['value'];
        }

        
$this->sheets[] = [
            
'name' => $rec_name,
            
'offset' => $rec_offset,
            
'sheetState' => $sheetState,
            
'sheetType' => $sheetType,
        ];
    }

    
/**
     * Read EXTERNALBOOK record.
     */
    
private function readExternalBook(): void
    
{
        
$length self::getUInt2d($this->data$this->pos 2);
        
$recordData $this->readRecordData($this->data$this->pos 4$length);

        
// move stream pointer to next record
        
$this->pos += $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)
            
$nm self::getUInt2d($recordData0);
            
$offset += 2;

            
// offset: 2; size: var; encoded URL without sheet name (Unicode string, 16-bit length)
            
$encodedUrlString self::readUnicodeStringLong(substr($recordData2));
            
$offset += $encodedUrlString['size'];

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

            
// store the record data
            
$this->externalBooks[] = [
                
'type' => 'external',
                
'encodedUrl' => $encodedUrlString['value'],
                
'externalSheetNames' => $externalSheetNames,
            ];
        } elseif (
substr($recordData22) == pack('CC'0x010x04)) {
            
// internal reference
            // offset: 0; size: 2; number of sheet in this document
            // offset: 2; size: 2; 0x01 0x04
            
$this->externalBooks[] = [
                
'type' => 'internal',
            ];
        } elseif (
substr($recordData04) == pack('vCC'0x00010x010x3A)) {
            
// add-in function
            // offset: 0; size: 2; 0x0001
            
$this->externalBooks[] = [
                
'type' => 'addInFunction',
            ];
        } elseif (
substr($recordData02) == pack('v'0x0000)) {
            
// DDE links, OLE links
            // offset: 0; size: 2; 0x0000
            // offset: 2; size: var; encoded source document name
            
$this->externalBooks[] = [
                
'type' => 'DDEorOLE',
            ];
        }
    }

    
/**
     * Read EXTERNNAME record.
     */
    
private function readExternName(): void
    
{
        
$length self::getUInt2d($this->data$this->pos 2);
        
$recordData $this->readRecordData($this->data$this->pos 4$length);

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

        
// external sheet references provided for named cells
        
if ($this->version == self::XLS_BIFF8) {
            
// offset: 0; size: 2; options
            
$options self::getUInt2d($recordData0);

            
// offset: 2; size: 2;

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

            // offset: 6; size: var
            
$nameString self::readUnicodeStringShort(substr($recordData6));

            
// offset: var; size: var; formula data
            
$offset $nameString['size'];
            
$formula $this->getFormulaFromStructure(substr($recordData$offset));

            
$this->externalNames[] = [
                
'name' => $nameString['value'],
                
'formula' => $formula,
            ];
        }
    }

    
/**
     * Read EXTERNSHEET record.
     */
    
private function readExternSheet(): void
    
{
        
$length self::getUInt2d($this->data$this->pos 2);
        
$recordData $this->readRecordData($this->data$this->pos 4$length);

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

        
// external sheet references provided for named cells
        
if ($this->version == self::XLS_BIFF8) {
            
// offset: 0; size: 2; number of following ref structures
            
$nm self::getUInt2d($recordData0);
            for (
$i 0$i $nm; ++$i) {
                
$this->ref[] = [
                    
// offset: 2 + 6 * $i; index to EXTERNALBOOK record
                    
'externalBookIndex' => self::getUInt2d($recordData$i),
                    
// offset: 4 + 6 * $i; index to first sheet in EXTERNALBOOK record
                    
'firstSheetIndex' => self::getUInt2d($recordData$i),
                    
// offset: 6 + 6 * $i; index to last sheet in EXTERNALBOOK record
                    
'lastSheetIndex' => self::getUInt2d($recordData$i),
                ];
            }
        }
    }

    
/**
     * DEFINEDNAME.
     *
     * This record is part of a Link Table. It contains the name
     * and the token array of an internal defined name. Token
     * arrays of defined names contain tokens with aberrant
     * token classes.
     *
     * --    "OpenOffice.org's Documentation of the Microsoft
     *         Excel File Format"
     */
    
private function readDefinedName(): void
    
{
        
$length self::getUInt2d($this->data$this->pos 2);
        
$recordData $this->readRecordData($this->data$this->pos 4$length);

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

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

            // offset: 0; size: 2; option flags
            
$opts self::getUInt2d($recordData0);

            
// 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
            
$flen self::getUInt2d($recordData4);

            
// offset: 8; size: 2; 0=Global name, otherwise index to sheet (1-based)
            
$scope self::getUInt2d($recordData8);

            
// offset: 14; size: var; Name (Unicode string without length field)
            
$string self::readUnicodeString(substr($recordData14), $nlen);

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

            try {
                
$formula $this->getFormulaFromStructure($formulaStructure);
            } catch (
PhpSpreadsheetException $e) {
                
$formula '';
            }

            
$this->definedname[] = [
                
'isBuiltInName' => $isBuiltInName,
                
'name' => $string['value'],
                
'formula' => $formula,
                
'scope' => $scope,
            ];
        }
    }

    
/**
     * Read MSODRAWINGGROUP record.
     */
    
private function readMsoDrawingGroup(): void
    
{
        
$length self::getUInt2d($this->data$this->pos 2);

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

        
$this->drawingGroupData .= $recordData;
    }

    
/**
     * SST - Shared String Table.
     *
     * This record contains a list of all strings used anywhere
     * in the workbook. Each string occurs only once. The
     * workbook uses indexes into the list to reference the
     * strings.
     *
     * --    "OpenOffice.org's Documentation of the Microsoft
     *         Excel File Format"
     */
    
private function readSst(): void
    
{
        
// offset within (spliced) record data
        
$pos 0;

        
// Limit global SST position, further control for bad SST Length in BIFF8 data
        
$limitposSST 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)
        
$nm self::getInt4d($recordData4);
        
$pos += 4;

        
// 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) {
                
$limitposSST $spliceOffset;
            }
        }

        
// loop through the Unicode strings (16-bit length)
        
for ($i 0$i $nm && $pos $limitposSST; ++$i) {
            
// number of characters in the Unicode string
            
$numChars self::getUInt2d($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
                
$formattingRuns self::getUInt2d($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 - Check it again to be sure that no error occurs when parsing SST structure
            
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 '';
                        
$jMax strlen($retstr);
                        for (
$j 0$j $jMax; ++$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 = [];
            if (
$hasRichText) {
                
// list of formatting runs
                
for ($j 0$j $formattingRuns; ++$j) {
                    
// first formatted character; zero-based
                    
$charPos self::getUInt2d($recordData$pos $j 4);

                    
// index to font record
                    
$fontIndex self::getUInt2d($recordData$pos $j 4);

                    
$fmtRuns[] = [
                        
'charPos' => $charPos,
                        
'fontIndex' => $fontIndex,
                    ];
                }
                
$pos += $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[] = [
                
'value' => $retstr,
                
'fmtRuns' => $fmtRuns,
            ];
        }

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

    
/**
     * Read PRINTGRIDLINES record.
     */
    
private function readPrintGridlines(): void
    
{
        
$length self::getUInt2d($this->data$this->pos 2);
        
$recordData $this->readRecordData($this->data$this->pos 4$length);

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

        if (
$this->version == self::XLS_BIFF8 && !$this->readDataOnly) {
            
// offset: 0; size: 2; 0 = do not print sheet grid lines; 1 = print sheet gridlines
            
$printGridlines = (bool) self::getUInt2d($recordData0);
            
$this->phpSheet->setPrintGridlines($printGridlines);
        }
    }

    
/**
     * Read DEFAULTROWHEIGHT record.
     */
    
private function readDefaultRowHeight(): void
    
{
        
$length self::getUInt2d($this->data$this->pos 2);
        
$recordData $this->readRecordData($this->data$this->pos 4$length);

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

        
// offset: 0; size: 2; option flags
        // offset: 2; size: 2; default height for unused rows, (twips 1/20 point)
        
$height self::getUInt2d($recordData2);
        
$this->phpSheet->getDefaultRowDimension()->setRowHeight($height 20);
    }

    
/**
     * Read SHEETPR record.
     */
    
private function readSheetPr(): void
    
{
        
$length self::getUInt2d($this->data$this->pos 2);
        
$recordData $this->readRecordData($this->data$this->pos 4$length);

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

        
// offset: 0; size: 2

        // bit: 6; mask: 0x0040; 0 = outline buttons above outline group
        
$isSummaryBelow = (0x0040 self::getUInt2d($recordData0)) >> 6;
        
$this->phpSheet->setShowSummaryBelow($isSummaryBelow);

        
// bit: 7; mask: 0x0080; 0 = outline buttons left of outline group
        
$isSummaryRight = (0x0080 self::getUInt2d($recordData0)) >> 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
        
$this->isFitToPages = (bool) ((0x0100 self::getUInt2d($recordData0)) >> 8);
    }

    
/**
     * Read HORIZONTALPAGEBREAKS record.
     */
    
private function readHorizontalPageBreaks(): void
    
{
        
$length self::getUInt2d($this->data$this->pos 2);
        
$recordData $this->readRecordData($this->data$this->pos 4$length);

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

        if (
$this->version == self::XLS_BIFF8 && !$this->readDataOnly) {
            
// offset: 0; size: 2; number of the following row index structures
            
$nm self::getUInt2d($recordData0);

            
// offset: 2; size: 6 * $nm; list of $nm row index structures
            
for ($i 0$i $nm; ++$i) {
                
$r self::getUInt2d($recordData$i);
                
$cf self::getUInt2d($recordData$i 2);
                
$cl self::getUInt2d($recordData$i 4);

                
// not sure why two column indexes are necessary?
                
$this->phpSheet->setBreakByColumnAndRow($cf 1$rWorksheet::BREAK_ROW);
            }
        }
    }

    
/**
     * Read VERTICALPAGEBREAKS record.
     */
    
private function readVerticalPageBreaks(): void
    
{
        
$length self::getUInt2d($this->data$this->pos 2);
        
$recordData $this->readRecordData($this->data$this->pos 4$length);

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

        if (
$this->version == self::XLS_BIFF8 && !$this->readDataOnly) {
            
// offset: 0; size: 2; number of the following column index structures
            
$nm self::getUInt2d($recordData0);

            
// offset: 2; size: 6 * $nm; list of $nm row index structures
            
for ($i 0$i $nm; ++$i) {
                
$c self::getUInt2d($recordData$i);
                
$rf self::getUInt2d($recordData$i 2);
                
$rl self::getUInt2d($recordData$i 4);

                
// not sure why two row indexes are necessary?
                
$this->phpSheet->setBreakByColumnAndRow($c 1$rfWorksheet::BREAK_COLUMN);
            }
        }
    }

    
/**
     * Read HEADER record.
     */
    
private function readHeader(): void
    
{
        
$length self::getUInt2d($this->data$this->pos 2);
        
$recordData $this->readRecordData($this->data$this->pos 4$length);

        
// move stream pointer to next record
        
$this->pos += $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']);
            }
        }
    }

    
/**
     * Read FOOTER record.
     */
    
private function readFooter(): void
    
{
        
$length self::getUInt2d($this->data$this->pos 2);
        
$recordData $this->readRecordData($this->data$this->pos 4$length);

        
// move stream pointer to next record
        
$this->pos += $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']);
            }
        }
    }

    
/**
     * Read HCENTER record.
     */
    
private function readHcenter(): void
    
{
        
$length self::getUInt2d($this->data$this->pos 2);
        
$recordData $this->readRecordData($this->data$this->pos 4$length);

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

        if (!
$this->readDataOnly) {
            
// offset: 0; size: 2; 0 = print sheet left aligned, 1 = print sheet centered horizontally
            
$isHorizontalCentered = (bool) self::getUInt2d($recordData0);

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

    
/**
     * Read VCENTER record.
     */
    
private function readVcenter(): void
    
{
        
$length self::getUInt2d($this->data$this->pos 2);
        
$recordData $this->readRecordData($this->data$this->pos 4$length);

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

        if (!
$this->readDataOnly) {
            
// offset: 0; size: 2; 0 = print sheet aligned at top page border, 1 = print sheet vertically centered
            
$isVerticalCentered = (bool) self::getUInt2d($recordData0);

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

    
/**
     * Read LEFTMARGIN record.
     */
    
private function readLeftMargin(): void
    
{
        
$length self::getUInt2d($this->data$this->pos 2);
        
$recordData $this->readRecordData($this->data$this->pos 4$length);

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

        if (!
$this->readDataOnly) {
            
// offset: 0; size: 8
            
$this->phpSheet->getPageMargins()->setLeft(self::extractNumber($recordData));
        }
    }

    
/**
     * Read RIGHTMARGIN record.
     */
    
private function readRightMargin(): void
    
{
        
$length self::getUInt2d($this->data$this->pos 2);
        
$recordData $this->readRecordData($this->data$this->pos 4$length);

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

        if (!
$this->readDataOnly) {
            
// offset: 0; size: 8
            
$this->phpSheet->getPageMargins()->setRight(self::extractNumber($recordData));
        }
    }

    
/**
     * Read TOPMARGIN record.
     */
    
private function readTopMargin(): void
    
{
        
$length self::getUInt2d($this->data$this->pos 2);
        
$recordData $this->readRecordData($this->data$this->pos 4$length);

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

        if (!
$this->readDataOnly) {
            
// offset: 0; size: 8
            
$this->phpSheet->getPageMargins()->setTop(self::extractNumber($recordData));
        }
    }

    
/**
     * Read BOTTOMMARGIN record.
     */
    
private function readBottomMargin(): void
    
{
        
$length self::getUInt2d($this->data$this->pos 2);
        
$recordData $this->readRecordData($this->data$this->pos 4$length);

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

        if (!
$this->readDataOnly) {
            
// offset: 0; size: 8
            
$this->phpSheet->getPageMargins()->setBottom(self::extractNumber($recordData));
        }
    }

    
/**
     * Read PAGESETUP record.
     */
    
private function readPageSetup(): void
    
{
        
$length self::getUInt2d($this->data$this->pos 2);
        
$recordData $this->readRecordData($this->data$this->pos 4$length);

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

        if (!
$this->readDataOnly) {
            
// offset: 0; size: 2; paper size
            
$paperSize self::getUInt2d($recordData0);

            
// offset: 2; size: 2; scaling factor
            
$scale self::getUInt2d($recordData2);

            
// offset: 6; size: 2; fit worksheet width to this number of pages, 0 = use as many as needed
            
$fitToWidth self::getUInt2d($recordData6);

            
// offset: 8; size: 2; fit worksheet height to this number of pages, 0 = use as many as needed
            
$fitToHeight self::getUInt2d($recordData8);

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

            // bit: 0; mask: 0x0001; 0=down then over, 1=over then down
            
$isOverThenDown = (0x0001 self::getUInt2d($recordData10));

            
// bit: 1; mask: 0x0002; 0=landscape, 1=portrait
            
$isPortrait = (0x0002 self::getUInt2d($recordData10)) >> 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
            
$isNotInit = (0x0004 self::getUInt2d($recordData10)) >> 2;

            if (!
$isNotInit) {
                
$this->phpSheet->getPageSetup()->setPaperSize($paperSize);
                
$this->phpSheet->getPageSetup()->setPageOrder(((bool) $isOverThenDown) ? PageSetup::PAGEORDER_OVER_THEN_DOWN PageSetup::PAGEORDER_DOWN_THEN_OVER);
                
$this->phpSheet->getPageSetup()->setOrientation(((bool) $isPortrait) ? PageSetup::ORIENTATION_PORTRAIT PageSetup::ORIENTATION_LANDSCAPE);

                
$this->phpSheet->getPageSetup()->setScale($scalefalse);
                
$this->phpSheet->getPageSetup()->setFitToPage((bool) $this->isFitToPages);
                
$this->phpSheet->getPageSetup()->setFitToWidth($fitToWidthfalse);
                
$this->phpSheet->getPageSetup()->setFitToHeight($fitToHeightfalse);
            }

            
// offset: 16; size: 8; header margin (IEEE 754 floating-point value)
            
$marginHeader self::extractNumber(substr($recordData168));
            
$this->phpSheet->getPageMargins()->setHeader($marginHeader);

            
// offset: 24; size: 8; footer margin (IEEE 754 floating-point value)
            
$marginFooter self::extractNumber(substr($recordData248));
            
$this->phpSheet->getPageMargins()->setFooter($marginFooter);
        }
    }

    
/**
     * PROTECT - Sheet protection (BIFF2 through BIFF8)
     *   if this record is omitted, then it also means no sheet protection.
     */
    
private function readProtect(): void
    
{
        
$length self::getUInt2d($this->data$this->pos 2);
        
$recordData $this->readRecordData($this->data$this->pos 4$length);

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

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

        
// offset: 0; size: 2;

        // bit 0, mask 0x01; 1 = sheet is protected
        
$bool = (0x01 self::getUInt2d($recordData0)) >> 0;
        
$this->phpSheet->getProtection()->setSheet((bool) $bool);
    }

    
/**
     * SCENPROTECT.
     */
    
private function readScenProtect(): void
    
{
        
$length self::getUInt2d($this->data$this->pos 2);
        
$recordData $this->readRecordData($this->data$this->pos 4$length);

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

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

        
// offset: 0; size: 2;

        // bit: 0, mask 0x01; 1 = scenarios are protected
        
$bool = (0x01 self::getUInt2d($recordData0)) >> 0;

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

    
/**
     * OBJECTPROTECT.
     */
    
private function readObjectProtect(): void
    
{
        
$length self::getUInt2d($this->data$this->pos 2);
        
$recordData $this->readRecordData($this->data$this->pos 4$length);

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

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

        
// offset: 0; size: 2;

        // bit: 0, mask 0x01; 1 = objects are protected
        
$bool = (0x01 self::getUInt2d($recordData0)) >> 0;

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

    
/**
     * PASSWORD - Sheet protection (hashed) password (BIFF2 through BIFF8).
     */
    
private function readPassword(): void
    
{
        
$length self::getUInt2d($this->data$this->pos 2);
        
$recordData $this->readRecordData($this->data$this->pos 4$length);

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

        if (!
$this->readDataOnly) {
            
// offset: 0; size: 2; 16-bit hash value of password
            
$password strtoupper(dechex(self::getUInt2d($recordData0))); // the hashed password
            
$this->phpSheet->getProtection()->setPassword($passwordtrue);
        }
    }

    
/**
     * Read DEFCOLWIDTH record.
     */
    
private function readDefColWidth(): void
    
{
        
$length self::getUInt2d($this->data$this->pos 2);
        
$recordData $this->readRecordData($this->data$this->pos 4$length);

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

        
// offset: 0; size: 2; default column width
        
$width self::getUInt2d($recordData0);
        if (
$width != 8) {
            
$this->phpSheet->getDefaultColumnDimension()->setWidth($width);
        }
    }

    
/**
     * Read COLINFO record.
     */
    
private function readColInfo(): void
    
{
        
$length self::getUInt2d($this->data$this->pos 2);
        
$recordData $this->readRecordData($this->data$this->pos 4$length);

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

        if (!
$this->readDataOnly) {
            
// offset: 0; size: 2; index to first column in range
            
$firstColumnIndex self::getUInt2d($recordData0);

            
// offset: 2; size: 2; index to last column in range
            
$lastColumnIndex self::getUInt2d($recordData2);

            
// offset: 4; size: 2; width of the column in 1/256 of the width of the zero character
            
$width self::getUInt2d($recordData4);

            
// offset: 6; size: 2; index to XF record for default column formatting
            
$xfIndex self::getUInt2d($recordData6);

            
// offset: 8; size: 2; option flags
            // bit: 0; mask: 0x0001; 1= columns are hidden
            
$isHidden = (0x0001 self::getUInt2d($recordData8)) >> 0;

            
// bit: 10-8; mask: 0x0700; outline level of the columns (0 = no outline)
            
$level = (0x0700 self::getUInt2d($recordData8)) >> 8;

            
// bit: 12; mask: 0x1000; 1 = collapsed
            
$isCollapsed = (0x1000 self::getUInt2d($recordData8)) >> 12;

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

            
for ($i $firstColumnIndex 1$i <= $lastColumnIndex 1; ++$i) {
                if (
$lastColumnIndex == 255 || $lastColumnIndex == 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);
                if (isset(
$this->mapCellXfIndex[$xfIndex])) {
                    
$this->phpSheet->getColumnDimensionByColumn($i)->setXfIndex($this->mapCellXfIndex[$xfIndex]);
                }
            }
        }
    }

    
/**
     * ROW.
     *
     * This record contains the properties of a single row in a
     * sheet. Rows and cells in a sheet are divided into blocks
     * of 32 rows.
     *
     * --    "OpenOffice.org's Documentation of the Microsoft
     *         Excel File Format"
     */
    
private function readRow(): void
    
{
        
$length self::getUInt2d($this->data$this->pos 2);
        
$recordData $this->readRecordData($this->data$this->pos 4$length);

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

        if (!
$this->readDataOnly) {
            
// offset: 0; size: 2; index of this row
            
$r self::getUInt2d($recordData0);

            
// 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
            
$height = (0x7FFF self::getUInt2d($recordData6)) >> 0;

            
// bit: 15: mask: 0x8000; 0 = row has custom height; 1= row has default height
            
$useDefaultHeight = (0x8000 self::getUInt2d($recordData6)) >> 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
            
$level = (0x00000007 self::getInt4d($recordData12)) >> 0;
            
$this->phpSheet->getRowDimension($r 1)->setOutlineLevel($level);

            
// bit: 4; mask: 0x00000010; 1 = outline group start or ends here... and is collapsed
            
$isCollapsed = (0x00000010 self::getInt4d($recordData12)) >> 4;
            
$this->phpSheet->getRowDimension($r 1)->setCollapsed($isCollapsed);

            
// bit: 5; mask: 0x00000020; 1 = row is hidden
            
$isHidden = (0x00000020 self::getInt4d($recordData12)) >> 5;
            
$this->phpSheet->getRowDimension($r 1)->setVisible(!$isHidden);

            
// bit: 7; mask: 0x00000080; 1 = row has explicit format
            
$hasExplicitFormat = (0x00000080 self::getInt4d($recordData12)) >> 7;

            
// bit: 27-16; mask: 0x0FFF0000; only applies when hasExplicitFormat = 1; index to XF record
            
$xfIndex = (0x0FFF0000 self::getInt4d($recordData12)) >> 16;

            if (
$hasExplicitFormat && isset($this->mapCellXfIndex[$xfIndex])) {
                
$this->phpSheet->getRowDimension($r 1)->setXfIndex($this->mapCellXfIndex[$xfIndex]);
            }
        }
    }

    
/**
     * Read RK record
     * This record represents a cell that contains an RK value
     * (encoded integer or floating-point value). If a
     * floating-point value cannot be encoded to an RK value,
     * a NUMBER record will be written. This record replaces the
     * record INTEGER written in BIFF2.
     *
     * --    "OpenOffice.org's Documentation of the Microsoft
     *         Excel File Format"
     */
    
private function readRk(): void
    
{
        
$length self::getUInt2d($this->data$this->pos 2);
        
$recordData $this->readRecordData($this->data$this->pos 4$length);

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

        
// offset: 0; size: 2; index to row
        
$row self::getUInt2d($recordData0);

        
// offset: 2; size: 2; index to column
        
$column self::getUInt2d($recordData2);
        
$columnString Coordinate::stringFromColumnIndex($column 1);

        
// Read cell?
        
if (($this->getReadFilter() !== null) && $this->getReadFilter()->readCell($columnString$row 1$this->phpSheet->getTitle())) {
            
// offset: 4; size: 2; index to XF record
            
$xfIndex self::getUInt2d($recordData4);

            
// offset: 6; size: 4; RK value
            
$rknum self::getInt4d($recordData6);
            
$numValue self::getIEEE754($rknum);

            
$cell $this->phpSheet->getCell($columnString . ($row 1));
            if (!
$this->readDataOnly && isset($this->mapCellXfIndex[$xfIndex])) {
                
// add style information
                
$cell->setXfIndex($this->mapCellXfIndex[$xfIndex]);
            }

            
// add cell
            
$cell->setValueExplicit($numValueDataType::TYPE_NUMERIC);
        }
    }

    
/**
     * Read LABELSST record
     * This record represents a cell that contains a string. It
     * replaces the LABEL record and RSTRING record used in
     * BIFF2-BIFF5.
     *
     * --    "OpenOffice.org's Documentation of the Microsoft
     *         Excel File Format"
     */
    
private function readLabelSst(): void
    
{
        
$length self::getUInt2d($this->data$this->pos 2);
        
$recordData $this->readRecordData($this->data$this->pos 4$length);

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

        
// offset: 0; size: 2; index to row
        
$row self::getUInt2d($recordData0);

        
// offset: 2; size: 2; index to column
        
$column self::getUInt2d($recordData2);
        
$columnString Coordinate::stringFromColumnIndex($column 1);

        
$emptyCell true;
        
// Read cell?
        
if (($this->getReadFilter() !== null) && $this->getReadFilter()->readCell($columnString$row 1$this->phpSheet->getTitle())) {
            
// offset: 4; size: 2; index to XF record
            
$xfIndex self::getUInt2d($recordData4);

            
// offset: 6; size: 4; index to SST record
            
$index self::getInt4d($recordData6);

            
// add cell
            
if (($fmtRuns $this->sst[$index]['fmtRuns']) && !$this->readDataOnly) {
                
// then we should treat as rich text
                
$richText = new RichText();
                
$charPos 0;
                
$sstCount count($this->sst[$index]['fmtRuns']);
                for (
$i 0$i <= $sstCount; ++$i) {
                    if (isset(
$fmtRuns[$i])) {
                        
$text StringHelper::substring($this->sst[$index]['value'], $charPos$fmtRuns[$i]['charPos'] - $charPos);
                        
$charPos $fmtRuns[$i]['charPos'];
                    } else {
                        
$text StringHelper::substring($this->sst[$index]['value'], $charPosStringHelper::countCharacters($this->sst[$index]['value']));
                    }

                    if (
StringHelper::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]);
                            }
                        }
                    }
                }
                if (
$this->readEmptyCells || trim($richText->getPlainText()) !== '') {
                    
$cell $this->phpSheet->getCell($columnString . ($row 1));
                    
$cell->setValueExplicit($richTextDataType::TYPE_STRING);
                    
$emptyCell false;
                }
            } else {
                if (
$this->readEmptyCells || trim($this->sst[$index]['value']) !== '') {
                    
$cell $this->phpSheet->getCell($columnString . ($row 1));
                    
$cell->setValueExplicit($this->sst[$index]['value'], DataType::TYPE_STRING);
                    
$emptyCell false;
                }
            }

            if (!
$this->readDataOnly && !$emptyCell && isset($this->mapCellXfIndex[$xfIndex])) {
                
// add style information
                
$cell->setXfIndex($this->mapCellXfIndex[$xfIndex]);
            }
        }
    }

    
/**
     * Read MULRK record
     * This record represents a cell range containing RK value
     * cells. All cells are located in the same row.
     *
     * --    "OpenOffice.org's Documentation of the Microsoft
     *         Excel File Format"
     */
    
private function readMulRk(): void
    
{
        
$length self::getUInt2d($this->data$this->pos 2);
        
$recordData $this->readRecordData($this->data$this->pos 4$length);

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

        
// offset: 0; size: 2; index to row
        
$row self::getUInt2d($recordData0);

        
// offset: 2; size: 2; index to first column
        
$colFirst self::getUInt2d($recordData2);

        
// offset: var; size: 2; index to last column
        
$colLast self::getUInt2d($recordData$length 2);
        
$columns $colLast $colFirst 1;

        
// offset within record data
        
$offset 4;

        for (
$i 1$i <= $columns; ++$i) {
            
$columnString Coordinate::stringFromColumnIndex($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
                
$xfIndex self::getUInt2d($recordData$offset);

                
// offset: var; size: 4; RK value
                
$numValue self::getIEEE754(self::getInt4d($recordData$offset 2));
                
$cell $this->phpSheet->getCell($columnString . ($row 1));
                if (!
$this->readDataOnly && isset($this->mapCellXfIndex[$xfIndex])) {
                    
// add style
                    
$cell->setXfIndex($this->mapCellXfIndex[$xfIndex]);
                }

                
// add cell value
                
$cell->setValueExplicit($numValueDataType::TYPE_NUMERIC);
            }

            
$offset += 6;
        }
    }

    
/**
     * Read NUMBER record
     * This record represents a cell that contains a
     * floating-point value.
     *
     * --    "OpenOffice.org's Documentation of the Microsoft
     *         Excel File Format"
     */
    
private function readNumber(): void
    
{
        
$length self::getUInt2d($this->data$this->pos 2);
        
$recordData $this->readRecordData($this->data$this->pos 4$length);

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

        
// offset: 0; size: 2; index to row
        
$row self::getUInt2d($recordData0);

        
// offset: 2; size 2; index to column
        
$column self::getUInt2d($recordData2);
        
$columnString Coordinate::stringFromColumnIndex($column 1);

        
// Read cell?
        
if (($this->getReadFilter() !== null) && $this->getReadFilter()->readCell($columnString$row 1$this->phpSheet->getTitle())) {
            
// offset 4; size: 2; index to XF record
            
$xfIndex self::getUInt2d($recordData4);

            
$numValue self::extractNumber(substr($recordData68));

            
$cell $this->phpSheet->getCell($columnString . ($row 1));
            if (!
$this->readDataOnly && isset($this->mapCellXfIndex[$xfIndex])) {
                
// add cell style
                
$cell->setXfIndex($this->mapCellXfIndex[$xfIndex]);
            }

            
// add cell value
            
$cell->setValueExplicit($numValueDataType::TYPE_NUMERIC);
        }
    }

    
/**
     * Read FORMULA record + perhaps a following STRING record if formula result is a string
     * This record contains the token array and the result of a
     * formula cell.
     *
     * --    "OpenOffice.org's Documentation of the Microsoft
     *         Excel File Format"
     */
    
private function readFormula(): void
    
{
        
$length self::getUInt2d($this->data$this->pos 2);
        
$recordData $this->readRecordData($this->data$this->pos 4$length);

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

        
// offset: 0; size: 2; row index
        
$row self::getUInt2d($recordData0);

        
// offset: 2; size: 2; col index
        
$column self::getUInt2d($recordData2);
        
$columnString Coordinate::stringFromColumnIndex($column 1);

        
// offset: 20: size: variable; formula structure
        
$formulaStructure substr($recordData20);

        
// offset: 14: size: 2; option flags, recalculate always, recalculate on open etc.
        
$options self::getUInt2d($recordData14);

        
// 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
            
$baseRow self::getUInt2d($formulaStructure3);
            
$baseCol self::getUInt2d($formulaStructure5);
            
$this->baseCell Coordinate::stringFromColumnIndex($baseCol 1) . ($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
            
$xfIndex self::getUInt2d($recordData4);

            
// 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 DataType::TYPE_STRING;

                
// read possible SHAREDFMLA record
                
$code self::getUInt2d($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 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 DataType::TYPE_ERROR;
                
$value Xls\ErrorCode::lookup(ord($recordData[8]));
            } elseif (
                (
ord($recordData[6]) == 3)
                && (
ord($recordData[12]) == 255)
                && (
ord($recordData[13]) == 255)
            ) {
                
// Formula result is a null string
                
$dataType DataType::TYPE_NULL;
                
$value '';
            } else {
                
// forumla result is a number, first 14 bytes like _NUMBER record
                
$dataType DataType::TYPE_NUMERIC;
                
$value self::extractNumber(substr($recordData68));
            }

            
$cell $this->phpSheet->getCell($columnString . ($row 1));
            if (!
$this->readDataOnly && isset($this->mapCellXfIndex[$xfIndex])) {
                
// 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 
Exception('Not BIFF8. Can only read BIFF8 formulas');
                    }
                    
$formula $this->getFormulaFromStructure($formulaStructure); // get formula in human language
                    
$cell->setValueExplicit('=' $formulaDataType::TYPE_FORMULA);
                } catch (
PhpSpreadsheetException $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);
        }
    }

    
/**
     * Read a SHAREDFMLA record. This function just stores the binary shared formula in the reader,
     * which usually contains relative references.
     * These will be used to construct the formula in each shared formula part after the sheet is read.
     */
    
private function readSharedFmla(): void
    
{
        
$length self::getUInt2d($this->data$this->pos 2);
        
$recordData $this->readRecordData($this->data$this->pos 4$length);

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

        
// offset: 0, size: 6; cell range address of the area used by the shared formula, not used for anything
        
$cellRange substr($recordData06);
        
$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
        
$formula substr($recordData8);

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

    
/**
     * Read a STRING record from current stream position and advance the stream pointer to next record
     * This record is used for storing result from FORMULA record when it is a string, and
     * it occurs directly after the FORMULA record.
     *
     * @return string The string contents as UTF-8
     */
    
private function readString()
    {
        
$length self::getUInt2d($this->data$this->pos 2);
        
$recordData $this->readRecordData($this->data$this->pos 4$length);

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

        if (
$this->version == self::XLS_BIFF8) {
            
$string self::readUnicodeStringLong($recordData);
            
$value $string['value'];
        } else {
            
$string $this->readByteStringLong($recordData);
            
$value $string['value'];
        }

        return 
$value;
    }

    
/**
     * Read BOOLERR record
     * This record represents a Boolean value or error value
     * cell.
     *
     * --    "OpenOffice.org's Documentation of the Microsoft
     *         Excel File Format"
     */
    
private function readBoolErr(): void
    
{
        
$length self::getUInt2d($this->data$this->pos 2);
        
$recordData $this->readRecordData($this->data$this->pos 4$length);

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

        
// offset: 0; size: 2; row index
        
$row self::getUInt2d($recordData0);

        
// offset: 2; size: 2; column index
        
$column self::getUInt2d($recordData2);
        
$columnString Coordinate::stringFromColumnIndex($column 1);

        
// Read cell?
        
if (($this->getReadFilter() !== null) && $this->getReadFilter()->readCell($columnString$row 1$this->phpSheet->getTitle())) {
            
// offset: 4; size: 2; index to XF record
            
$xfIndex self::getUInt2d($recordData4);

            
// 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
                    
$cell->setValueExplicit($valueDataType::TYPE_BOOL);

                    break;
                case 
1// error type
                    
$value Xls\ErrorCode::lookup($boolErr);

                    
// add cell value
                    
$cell->setValueExplicit($valueDataType::TYPE_ERROR);

                    break;
            }

            if (!
$this->readDataOnly && isset($this->mapCellXfIndex[$xfIndex])) {
                
// add cell style
                
$cell->setXfIndex($this->mapCellXfIndex[$xfIndex]);
            }
        }
    }

    
/**
     * Read MULBLANK record
     * This record represents a cell range of empty cells. All
     * cells are located in the same row.
     *
     * --    "OpenOffice.org's Documentation of the Microsoft
     *         Excel File Format"
     */
    
private function readMulBlank(): void
    
{
        
$length self::getUInt2d($this->data$this->pos 2);
        
$recordData $this->readRecordData($this->data$this->pos 4$length);

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

        
// offset: 0; size: 2; index to row
        
$row self::getUInt2d($recordData0);

        
// offset: 2; size: 2; index to first column
        
$fc self::getUInt2d($recordData2);

        
// offset: 4; size: 2 x nc; list of indexes to XF records
        // add style information
        
if (!$this->readDataOnly && $this->readEmptyCells) {
            for (
$i 0$i $length 3; ++$i) {
                
$columnString Coordinate::stringFromColumnIndex($fc $i 1);

                
// Read cell?
                
if (($this->getReadFilter() !== null) && $this->getReadFilter()->readCell($columnString$row 1$this->phpSheet->getTitle())) {
                    
$xfIndex self::getUInt2d($recordData$i);
                    if (isset(
$this->mapCellXfIndex[$xfIndex])) {
                        
$this->phpSheet->getCell($columnString . ($row 1))->setXfIndex($this->mapCellXfIndex[$xfIndex]);
                    }
                }
            }
        }

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

    
/**
     * Read LABEL record
     * This record represents a cell that contains a string. In
     * BIFF8 it is usually replaced by the LABELSST record.
     * Excel still uses this record, if it copies unformatted
     * text cells to the clipboard.
     *
     * --    "OpenOffice.org's Documentation of the Microsoft
     *         Excel File Format"
     */
    
private function readLabel(): void
    
{
        
$length self::getUInt2d($this->data$this->pos 2);
        
$recordData $this->readRecordData($this->data$this->pos 4$length);

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

        
// offset: 0; size: 2; index to row
        
$row self::getUInt2d($recordData0);

        
// offset: 2; size: 2; index to column
        
$column self::getUInt2d($recordData2);
        
$columnString Coordinate::stringFromColumnIndex($column 1);

        
// Read cell?
        
if (($this->getReadFilter() !== null) && $this->getReadFilter()->readCell($columnString$row 1$this->phpSheet->getTitle())) {
            
// offset: 4; size: 2; XF index
            
$xfIndex self::getUInt2d($recordData4);

            
// add cell value
            // todo: what if string is very long? continue record
            
if ($this->version == self::XLS_BIFF8) {
                
$string self::readUnicodeStringLong(substr($recordData6));
                
$value $string['value'];
            } else {
                
$string $this->readByteStringLong(substr($recordData6));
                
$value $string['value'];
            }
            if (
$this->readEmptyCells || trim($value) !== '') {
                
$cell $this->phpSheet->getCell($columnString . ($row 1));
                
$cell->setValueExplicit($valueDataType::TYPE_STRING);

                if (!
$this->readDataOnly && isset($this->mapCellXfIndex[$xfIndex])) {
                    
// add cell style
                    
$cell->setXfIndex($this->mapCellXfIndex[$xfIndex]);
                }
            }
        }
    }

    
/**
     * Read BLANK record.
     */
    
private function readBlank(): void
    
{
        
$length self::getUInt2d($this->data$this->pos 2);
        
$recordData $this->readRecordData($this->data$this->pos 4$length);

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

        
// offset: 0; size: 2; row index
        
$row self::getUInt2d($recordData0);

        
// offset: 2; size: 2; col index
        
$col self::getUInt2d($recordData2);
        
$columnString Coordinate::stringFromColumnIndex($col 1);

        
// Read cell?
        
if (($this->getReadFilter() !== null) && $this->getReadFilter()->readCell($columnString$row 1$this->phpSheet->getTitle())) {
            
// offset: 4; size: 2; XF index
            
$xfIndex self::getUInt2d($recordData4);

            
// add style information
            
if (!$this->readDataOnly && $this->readEmptyCells && isset($this->mapCellXfIndex[$xfIndex])) {
                
$this->phpSheet->getCell($columnString . ($row 1))->setXfIndex($this->mapCellXfIndex[$xfIndex]);
            }
        }
    }

    
/**
     * Read MSODRAWING record.
     */
    
private function readMsoDrawing(): void
    
{
        
$length self::getUInt2d($this->data$this->pos 2);

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

        
$this->drawingData .= $recordData;
    }

    
/**
     * Read OBJ record.
     */
    
private function readObj(): void
    
{
        
$length self::getUInt2d($this->data$this->pos 2);
        
$recordData $this->readRecordData($this->data$this->pos 4$length);

        
// move stream pointer to next record
        
$this->pos += $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
        
$ftCmoType self::getUInt2d($recordData0);
        
$cbCmoSize self::getUInt2d($recordData2);
        
$otObjType self::getUInt2d($recordData4);
        
$idObjID self::getUInt2d($recordData6);
        
$grbitOpts self::getUInt2d($recordData6);

        
$this->objs[] = [
            
'ftCmoType' => $ftCmoType,
            
'cbCmoSize' => $cbCmoSize,
            
'otObjType' => $otObjType,
            
'idObjID' => $idObjID,
            
'grbitOpts' => $grbitOpts,
        ];
        
$this->textObjRef $idObjID;
    }

    
/**
     * Read WINDOW2 record.
     */
    
private function readWindow2(): void
    
{
        
$length self::getUInt2d($this->data$this->pos 2);
        
$recordData $this->readRecordData($this->data$this->pos 4$length);

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

        
// offset: 0; size: 2; option flags
        
$options self::getUInt2d($recordData0);

        
// offset: 2; size: 2; index to first visible row
        
$firstVisibleRow self::getUInt2d($recordData2);

        
// offset: 4; size: 2; index to first visible colum
        
$firstVisibleColumn self::getUInt2d($recordData4);
        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
            
if (!isset($recordData[10])) {
                
$zoomscaleInPageBreakPreview 0;
            } else {
                
$zoomscaleInPageBreakPreview self::getUInt2d($recordData10);
            }

            if (
$zoomscaleInPageBreakPreview === 0) {
                
$zoomscaleInPageBreakPreview 60;
            }

            if (!isset(
$recordData[12])) {
                
$zoomscaleInNormalView 0;
            } else {
                
$zoomscaleInNormalView self::getUInt2d($recordData12);
            }

            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) {
            
$this->spreadsheet->setActiveSheetIndex($this->spreadsheet->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() !== SheetView::SHEETVIEW_PAGE_LAYOUT) {
            
//NOTE: this setting is inferior to page layout view(Excel2007-)
            
$view $isPageBreakPreview SheetView::SHEETVIEW_PAGE_BREAK_PREVIEW 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);
            }
        }
    }

    
/**
     * Read PLV Record(Created by Excel2007 or upper).
     */
    
private function readPageLayoutView(): void
    
{
        
$length self::getUInt2d($this->data$this->pos 2);
        
$recordData $this->readRecordData($this->data$this->pos 4$length);

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

        
// offset: 0; size: 2; rt
        //->ignore
        
$rt self::getUInt2d($recordData0);
        
// offset: 2; size: 2; grbitfr
        //->ignore
        
$grbitFrt self::getUInt2d($recordData2);
        
// offset: 4; size: 8; reserved
        //->ignore

        // offset: 12; size 2; zoom scale
        
$wScalePLV self::getUInt2d($recordData12);
        
// offset: 14; size 2; grbit
        
$grbit self::getUInt2d($recordData14);

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

        
if ($fPageLayoutView === 1) {
            
$this->phpSheet->getSheetView()->setView(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.
    
}

    
/**
     * Read SCL record.
     */
    
private function readScl(): void
    
{
        
$length self::getUInt2d($this->data$this->pos 2);
        
$recordData $this->readRecordData($this->data$this->pos 4$length);

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

        
// offset: 0; size: 2; numerator of the view magnification
        
$numerator self::getUInt2d($recordData0);

        
// offset: 2; size: 2; numerator of the view magnification
        
$denumerator self::getUInt2d($recordData2);

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

    
/**
     * Read PANE record.
     */
    
private function readPane(): void
    
{
        
$length self::getUInt2d($this->data$this->pos 2);
        
$recordData $this->readRecordData($this->data$this->pos 4$length);

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

        if (!
$this->readDataOnly) {
            
// offset: 0; size: 2; position of vertical split
            
$px self::getUInt2d($recordData0);

            
// offset: 2; size: 2; position of horizontal split
            
$py self::getUInt2d($recordData2);

            
// offset: 4; size: 2; top most visible row in the bottom pane
            
$rwTop self::getUInt2d($recordData4);

            
// offset: 6; size: 2; first visible left column in the right pane
            
$colLeft self::getUInt2d($recordData6);

            if (
$this->frozen) {
                
// frozen panes
                
$cell Coordinate::stringFromColumnIndex($px 1) . ($py 1);
                
$topLeftCell Coordinate::stringFromColumnIndex($colLeft 1) . ($rwTop 1);
                
$this->phpSheet->freezePane($cell$topLeftCell);
            }
            
// unfrozen panes; split windows; not supported by PhpSpreadsheet core
        
}
    }

    
/**
     * Read SELECTION record. There is one such record for each pane in the sheet.
     */
    
private function readSelection(): void
    
{
        
$length self::getUInt2d($this->data$this->pos 2);
        
$recordData $this->readRecordData($this->data$this->pos 4$length);

        
// move stream pointer to next record
        
$this->pos += $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
            
$r self::getUInt2d($recordData1);

            
// offset: 3; size: 2; index to column of the active cell
            
$c self::getUInt2d($recordData3);

            
// offset: 5; size: 2; index into the following cell range list to the
            //  entry that contains the active cell
            
$index self::getUInt2d($recordData5);

            
// offset: 7; size: var; cell range address list containing all selected cell ranges
            
$data substr($recordData7);
            
$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\d+\:)IV(\d+)$/'$selectedCells)) {
                
$selectedCells preg_replace('/^(A\d+\:)IV(\d+)$/''${1}XFD${2}'$selectedCells);
            }

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

    private function 
includeCellRangeFiltered($cellRangeAddress)
    {
        
$includeCellRange true;
        if (
$this->getReadFilter() !== null) {
            
$includeCellRange false;
            
$rangeBoundaries Coordinate::getRangeBoundaries($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;
    }

    
/**
     * MERGEDCELLS.
     *
     * This record contains the addresses of merged cell ranges
     * in the current sheet.
     *
     * --    "OpenOffice.org's Documentation of the Microsoft
     *         Excel File Format"
     */
    
private function readMergedCells(): void
    
{
        
$length self::getUInt2d($this->data$this->pos 2);
        
$recordData $this->readRecordData($this->data$this->pos 4$length);

        
// move stream pointer to next record
        
$this->pos += $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);
                }
            }
        }
    }

    
/**
     * Read HYPERLINK record.
     */
    
private function readHyperLink(): void
    
{
        
$length self::getUInt2d($this->data$this->pos 2);
        
$recordData $this->readRecordData($this->data$this->pos 4$length);

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

        if (!
$this->readDataOnly) {
            
// offset: 0; size: 8; cell range address of all cells containing this hyperlink
            
try {
                
$cellRange $this->readBIFF8CellRangeAddressFixed($recordData);
            } catch (
PhpSpreadsheetException $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
            
$isFileLinkOrUrl = (0x00000001 self::getUInt2d($recordData28)) >> 0;

            
// bit: 1; mask: 0x00000002; 0 = relative path, 1 = absolute path or URL
            
$isAbsPathOrUrl = (0x00000001 self::getUInt2d($recordData28)) >> 1;

            
// bit: 2 (and 4); mask: 0x00000014; 0 = no description
            
$hasDesc = (0x00000014 self::getUInt2d($recordData28)) >> 2;

            
// bit: 3; mask: 0x00000008; 0 = no text, 1 = has text
            
$hasText = (0x00000008 self::getUInt2d($recordData28)) >> 3;

            
// bit: 7; mask: 0x00000080; 0 = no target frame, 1 = has target frame
            
$hasFrame = (0x00000080 self::getUInt2d($recordData28)) >> 7;

            
// bit: 8; mask: 0x00000100; 0 = file link or URL, 1 = UNC path (inc. server name)
            
$isUNC = (0x00000100 self::getUInt2d($recordData28)) >> 8;

            
// offset within record data
            
$offset 32;

            if (
$hasDesc) {
                
// offset: 32; size: var; character count of description text
                
$dl self::getInt4d($recordData32);
                
// offset: 36; size: var; character array of description text, no Unicode string header, always 16-bit characters, zero terminated
                
$desc self::encodeUTF16(substr($recordData36* ($dl 1)), false);
                
$offset += $dl;
            }
            if (
$hasFrame) {
                
$fl self::getInt4d($recordData$offset);
                
$offset += $fl;
            }

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

            if (
$isUNC) {
                
$hyperlinkType 'UNC';
            } elseif (!
$isFileLinkOrUrl) {
                
$hyperlinkType 'workbook';
            } elseif (
ord($recordData[$offset]) == 0x03) {
                
$hyperlinkType 'local';
            } elseif (
ord($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);
                    
$nullOffset strpos($urlchr(0x00));
                    if (
$nullOffset) {
                        
$url substr($url0$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.
                    
$upLevelCount self::getUInt2d($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);
                    
$shortenedFilePath self::encodeUTF16($shortenedFilePathtrue);
                    
$shortenedFilePath substr($shortenedFilePath0, -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);
                        
$extendedFilePath self::encodeUTF16($extendedFilePathfalse);
                        
$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$offset* ($tl 1)), false);
                
$url .= $text;
            }

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

    
/**
     * Read DATAVALIDATIONS record.
     */
    
private function readDataValidations(): void
    
{
        
$length self::getUInt2d($this->data$this->pos 2);
        
$recordData $this->readRecordData($this->data$this->pos 4$length);

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

    
/**
     * Read DATAVALIDATION record.
     */
    
private function readDataValidation(): void
    
{
        
$length self::getUInt2d($this->data$this->pos 2);
        
$recordData $this->readRecordData($this->data$this->pos 4$length);

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

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

        
// offset: 0; size: 4; Options
        
$options self::getInt4d($recordData0);

        
// bit: 0-3; mask: 0x0000000F; type
        
$type = (0x0000000F $options) >> 0;
        switch (
$type) {
            case 
0x00:
                
$type DataValidation::TYPE_NONE;

                break;
            case 
0x01:
                
$type DataValidation::TYPE_WHOLE;

                break;
            case 
0x02:
                
$type DataValidation::TYPE_DECIMAL;

                break;
            case 
0x03:
                
$type DataValidation::TYPE_LIST;

                break;
            case 
0x04:
                
$type DataValidation::TYPE_DATE;

                break;
            case 
0x05:
                
$type DataValidation::TYPE_TIME;

                break;
            case 
0x06:
                
$type DataValidation::TYPE_TEXTLENGTH;

                break;
            case 
0x07:
                
$type DataValidation::TYPE_CUSTOM;

                break;
        }

        
// bit: 4-6; mask: 0x00000070; error type
        
$errorStyle = (0x00000070 $options) >> 4;
        switch (
$errorStyle) {
            case 
0x00:
                
$errorStyle DataValidation::STYLE_STOP;

                break;
            case 
0x01:
                
$errorStyle DataValidation::STYLE_WARNING;

                break;
            case 
0x02:
                
$errorStyle 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 DataValidation::OPERATOR_BETWEEN;

                break;
            case 
0x01:
                
$operator DataValidation::OPERATOR_NOTBETWEEN;

                break;
            case 
0x02:
                
$operator DataValidation::OPERATOR_EQUAL;

                break;
            case 
0x03:
                
$operator DataValidation::OPERATOR_NOTEQUAL;

                break;
            case 
0x04:
                
$operator DataValidation::OPERATOR_GREATERTHAN;

                break;
            case 
0x05:
                
$operator DataValidation::OPERATOR_LESSTHAN;

                break;
            case 
0x06:
                
$operator DataValidation::OPERATOR_GREATERTHANOREQUAL;

                break;
            case 
0x07:
                
$operator 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
        
$sz1 self::getUInt2d($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 == DataValidation::TYPE_LIST) {
                
$formula1 str_replace(chr(0), ','$formula1);
            }
        } catch (
PhpSpreadsheetException $e) {
            return;
        }
        
$offset += $sz1;

        
// offset: var; size: 2; size of the formula data for the first condition
        
$sz2 self::getUInt2d($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 (
PhpSpreadsheetException $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);
            foreach (
Coordinate::extractAllCellReferencesInRange($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);
            }
        }
    }

    
/**
     * Read SHEETLAYOUT record. Stores sheet tab color information.
     */
    
private function readSheetLayout(): void
    
{
        
$length self::getUInt2d($this->data$this->pos 2);
        
$recordData $this->readRecordData($this->data$this->pos 4$length);

        
// move stream pointer to next record
        
$this->pos += $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?)
            
$sz self::getInt4d($recordData12);

            switch (
$sz) {
                case 
0x14:
                    
// offset: 16; size: 2; color index for sheet tab
                    
$colorIndex self::getUInt2d($recordData16);
                    
$color Xls\Color::map($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;
            }
        }
    }

    
/**
     * Read SHEETPROTECTION record (FEATHEADR).
     */
    
private function readSheetProtection(): void
    
{
        
$length self::getUInt2d($this->data$this->pos 2);
        
$recordData $this->readRecordData($this->data$this->pos 4$length);

        
// move stream pointer to next record
        
$this->pos += $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)
        
$isf self::getUInt2d($recordData12);
        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
        
$options self::getUInt2d($recordData19);

        
// 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
    
}

    
/**
     * Read RANGEPROTECTION record
     * Reading of this record is based on Microsoft Office Excel 97-2000 Binary File Format Specification,
     * where it is referred to as FEAT record.
     */
    
private function readRangeProtection(): void
    
{
        
$length self::getUInt2d($this->data$this->pos 2);
        
$recordData $this->readRecordData($this->data$this->pos 4$length);

        
// move stream pointer to next record
        
$this->pos += $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
            
$isf self::getUInt2d($recordData12);
            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
            
$cref self::getUInt2d($recordData19);
            
$offset += 2;

            
$offset += 6;

            
// offset: 27; size: 8 * $cref; list of cell ranges (like in hyperlink record)
            
$cellRanges = [];
            for (
$i 0$i $cref; ++$i) {
                try {
                    
$cellRange $this->readBIFF8CellRangeAddressFixed(substr($recordData27 $i8));
                } catch (
PhpSpreadsheetException $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);
            }
        }
    }

    
/**
     * Read a free CONTINUE record. Free CONTINUE record may be a camouflaged MSODRAWING record
     * When MSODRAWING data on a sheet exceeds 8224 bytes, CONTINUE records are used instead. Undocumented.
     * In this case, we must treat the CONTINUE record as a MSODRAWING record.
     */
    
private function readContinue(): void
    
{
        
$length self::getUInt2d($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 += $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 += $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 = [0xF0030xF0040xF00D]; // add identifiers if we find more

        
$splitPoint self::getUInt2d($recordData2);
        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 += $length;
    }

    
/**
     * Reads a record from current position in data stream and continues reading data as long as CONTINUE
     * records are found. Splices the record data pieces and returns the combined string as if record data
     * is in one piece.
     * Moves to next current position in data stream to start of next record different from a CONtINUE record.
     *
     * @return array
     */
    
private function getSplicedRecordData()
    {
        
$data '';
        
$spliceOffsets = [];

        
$i 0;
        
$spliceOffsets[0] = 0;

        do {
            ++
$i;

            
// offset: 0; size: 2; identifier
            
$identifier self::getUInt2d($this->data$this->pos);
            
// offset: 2; size: 2; length
            
$length self::getUInt2d($this->data$this->pos 2);
            
$data .= $this->readRecordData($this->data$this->pos 4$length);

            
$spliceOffsets[$i] = $spliceOffsets[$i 1] + $length;

            
$this->pos += $length;
            
$nextIdentifier self::getUInt2d($this->data$this->pos);
        } while (
$nextIdentifier == self::XLS_TYPE_CONTINUE);

        return [
            
'recordData' => $data,
            
'spliceOffsets' => $spliceOffsets,
        ];
    }

    
/**
     * Convert formula structure into human readable Excel formula like 'A3+A5*5'.
     *
     * @param string $formulaStructure The complete binary data for the formula
     * @param string $baseCell Base cell, only needed when formula contains tRefN tokens, e.g. with shared formulas
     *
     * @return string Human readable formula
     */
    
private function getFormulaFromStructure($formulaStructure$baseCell 'A1')
    {
        
// offset: 0; size: 2; size of the following formula data
        
$sz self::getUInt2d($formulaStructure0);

        
// offset: 2; size: sz
        
$formulaData substr($formulaStructure2$sz);

        
// offset: 2 + sz; size: variable (optional)
        
if (strlen($formulaStructure) > $sz) {
            
$additionalData substr($formulaStructure$sz);
        } else {
            
$additionalData '';
        }

        return 
$this->getFormulaFromData($formulaData$additionalData$baseCell);
    }

    
/**
     * Take formula data and additional data for formula and return human readable formula.
     *
     * @param string $formulaData The binary data for the formula itself
     * @param string $additionalData Additional binary data going with the formula
     * @param string $baseCell Base cell, only needed when formula contains tRefN tokens, e.g. with shared formulas
     *
     * @return string Human readable formula
     */
    
private function getFormulaFromData($formulaData$additionalData ''$baseCell 'A1')
    {
        
// start parsing the formula data
        
$tokens = [];

        while (
strlen($formulaData) > && $token $this->getNextToken($formulaData$baseCell)) {
            
$tokens[] = $token;
            
$formulaData substr($formulaData$token['size']);
        }

        
$formulaString $this->createFormulaFromTokens($tokens$additionalData);

        return 
$formulaString;
    }

    
/**
     * Take array of tokens together with additional data for formula and return human readable formula.
     *
     * @param array $tokens
     * @param string $additionalData Additional binary data going with the formula
     *
     * @return string Human readable formula
     */
    
private function createFormulaFromTokens($tokens$additionalData)
    {
        
// empty formula?
        
if (empty($tokens)) {
            return 
'';
        }

        
$formulaStrings = [];
        foreach (
$tokens as $token) {
            
// initialize spaces
            
$space0 $space0 ?? ''// spaces before next token, not tParen
            
$space1 $space1 ?? ''// carriage returns before next token, not tParen
            
$space2 $space2 ?? ''// spaces before opening parenthesis
            
$space3 $space3 ?? ''// carriage returns before opening parenthesis
            
$space4 $space4 ?? ''// spaces before closing parenthesis
            
$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 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 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];

        return 
$formulaString;
    }

    
/**
     * Fetch next token from binary formula data.
     *
     * @param string $formulaData Formula data
     * @param string $baseCell Base cell, only needed when formula contains tRefN tokens, e.g. with shared formulas
     *
     * @return array
     */
    
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
                
$string self::readUnicodeStringShort(substr($formulaData1));
                
$size $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)
                        
$nc self::getUInt2d($formulaData2);
                        
// offset: 4; size: 2 * $nc
                        // offset: 4 + 2 * $nc; size: 2
                        
$size $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 
Exception('Unrecognized space type in tAttrSpace token');

                                break;
                        }
                        
// offset: 3; size: 1; number of inserted spaces/carriage returns
                        
$spacecount ord($formulaData[3]);

                        
$data = ['spacetype' => $spacetype'spacecount' => $spacecount];

                        break;
                    default:
                        throw new 
Exception('Unrecognized attribute flag in tAttr token');

                        break;
                }

                break;
            case 
0x1C:    //    error code
                // offset: 1; size: 1; error code
                
$name 'tErr';
                
$size 2;
                
$data Xls\ErrorCode::lookup(ord($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;
                
$data self::getUInt2d($formulaData1);

                break;
            case 
0x1F:    //    number
                // offset: 1; size: 8;
                
$name 'tNum';
                
$size 9;
                
$data self::extractNumber(substr($formulaData1));
                
$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::getUInt2d($formulaData1)) {
                    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 
Exception('Unrecognized function in formula');

                        break;
                }
                
$data = ['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
                
$index self::getUInt2d($formulaData2);
                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 
Exception('Unrecognized function in formula');

                        break;
                }
                
$data = ['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
                
$definedNameIndex self::getUInt2d($formulaData1) - 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 $this->readBIFF8CellAddress(substr($formulaData14));

                break;
            case 
0x25:    //    cell range reference to cells in the same sheet (2d)
            
case 0x45:
            case 
0x65:
                
$name 'tArea';
                
$size 9;
                
$data $this->readBIFF8CellRangeAddress(substr($formulaData18));

                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
                
$subSize self::getUInt2d($formulaData5);
                
$size $subSize;
                
$data $this->getFormulaFromData(substr($formulaData7$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
                
$subSize self::getUInt2d($formulaData5);
                
$size $subSize;
                
$data $this->getFormulaFromData(substr($formulaData7$subSize));

                break;
            case 
0x29:    //    Variable reference sub-expression
            
case 0x49:
            case 
0x69:
                
$name 'tMemFunc';
                
// offset: 1; size: 2; size of the following sub-expression
                
$subSize self::getUInt2d($formulaData1);
                
$size $subSize;
                
$data $this->getFormulaFromData(substr($formulaData3$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 $this->readBIFF8CellAddressB(substr($formulaData14), $baseCell);

                break;
            case 
0x2D:    //    Relative 2d range reference
            
case 0x4D:
            case 
0x6D:
                
$name 'tAreaN';
                
$size 9;
                
$data $this->readBIFF8CellRangeAddressB(substr($formulaData18), $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
                
$index self::getUInt2d($formulaData3);
                
// 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 $this->readSheetRangeByRefIndex(self::getUInt2d($formulaData1));
                    
// offset: 3; size: 4; cell address
                    
$cellAddress $this->readBIFF8CellAddress(substr($formulaData34));

                    
$data "$sheetRange!$cellAddress";
                } catch (
PhpSpreadsheetException $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 $this->readSheetRangeByRefIndex(self::getUInt2d($formulaData1));
                    
// offset: 3; size: 8; cell address
                    
$cellRangeAddress $this->readBIFF8CellRangeAddress(substr($formulaData38));

                    
$data "$sheetRange!$cellRangeAddress";
                } catch (
PhpSpreadsheetException $e) {
                    
// deleted sheet reference
                    
$data '#REF!';
                }

                break;
            
// Unknown cases    // don't know how to deal with
            
default:
                throw new 
Exception('Unrecognized token ' sprintf('%02X'$id) . ' in formula');

                break;
        }

        return [
            
'id' => $id,
            
'name' => $name,
            
'size' => $size,
            
'data' => $data,
        ];
    }

    
/**
     * Reads a cell address in BIFF8 e.g. 'A2' or '$A$2'
     * section 3.3.4.
     *
     * @param string $cellAddressStructure
     *
     * @return string
     */
    
private function readBIFF8CellAddress($cellAddressStructure)
    {
        
// offset: 0; size: 2; index to row (0... 65535) (or offset (-32768... 32767))
        
$row self::getUInt2d($cellAddressStructure0) + 1;

        
// offset: 2; size: 2; index to column or column offset + relative flags
        // bit: 7-0; mask 0x00FF; column index
        
$column Coordinate::stringFromColumnIndex((0x00FF self::getUInt2d($cellAddressStructure2)) + 1);

        
// bit: 14; mask 0x4000; (1 = relative column index, 0 = absolute column index)
        
if (!(0x4000 self::getUInt2d($cellAddressStructure2))) {
            
$column '$' $column;
        }
        
// bit: 15; mask 0x8000; (1 = relative row index, 0 = absolute row index)
        
if (!(0x8000 self::getUInt2d($cellAddressStructure2))) {
            
$row '$' $row;
        }

        return 
$column $row;
    }

    
/**
     * Reads a cell address in BIFF8 for shared formulas. Uses positive and negative values for row and column
     * to indicate offsets from a base cell
     * section 3.3.4.
     *
     * @param string $cellAddressStructure
     * @param string $baseCell Base cell, only needed when formula contains tRefN tokens, e.g. with shared formulas
     *
     * @return string
     */
    
private function readBIFF8CellAddressB($cellAddressStructure$baseCell 'A1')
    {
        [
$baseCol$baseRow] = Coordinate::coordinateFromString($baseCell);
        
$baseCol Coordinate::columnIndexFromString($baseCol) - 1;

        
// offset: 0; size: 2; index to row (0... 65535) (or offset (-32768... 32767))
        
$rowIndex self::getUInt2d($cellAddressStructure0);
        
$row self::getUInt2d($cellAddressStructure0) + 1;

        
// bit: 14; mask 0x4000; (1 = relative column index, 0 = absolute column index)
        
if (!(0x4000 self::getUInt2d($cellAddressStructure2))) {
            
// offset: 2; size: 2; index to column or column offset + relative flags
            // bit: 7-0; mask 0x00FF; column index
            
$colIndex 0x00FF self::getUInt2d($cellAddressStructure2);

            
$column Coordinate::stringFromColumnIndex($colIndex 1);
            
$column '$' $column;
        } else {
            
// offset: 2; size: 2; index to column or column offset + relative flags
            // bit: 7-0; mask 0x00FF; column index
            
$relativeColIndex 0x00FF self::getInt2d($cellAddressStructure2);
            
$colIndex $baseCol $relativeColIndex;
            
$colIndex = ($colIndex 256) ? $colIndex $colIndex 256;
            
$colIndex = ($colIndex >= 0) ? $colIndex $colIndex 256;
            
$column Coordinate::stringFromColumnIndex($colIndex 1);
        }

        
// bit: 15; mask 0x8000; (1 = relative row index, 0 = absolute row index)
        
if (!(0x8000 self::getUInt2d($cellAddressStructure2))) {
            
$row '$' $row;
        } else {
            
$rowIndex = ($rowIndex <= 32767) ? $rowIndex $rowIndex 65536;
            
$row $baseRow $rowIndex;
        }

        return 
$column $row;
    }

    
/**
     * Reads a cell range address in BIFF5 e.g. 'A2:B6' or 'A1'
     * always fixed range
     * section 2.5.14.
     *
     * @param string $subData
     *
     * @return string
     */
    
private function readBIFF5CellRangeAddressFixed($subData)
    {
        
// offset: 0; size: 2; index to first row
        
$fr self::getUInt2d($subData0) + 1;

        
// offset: 2; size: 2; index to last row
        
$lr self::getUInt2d($subData2) + 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 
Exception('Not a cell range address');
        }

        
// column index to letter
        
$fc Coordinate::stringFromColumnIndex($fc 1);
        
$lc Coordinate::stringFromColumnIndex($lc 1);

        if (
$fr == $lr && $fc == $lc) {
            return 
"$fc$fr";
        }

        return 
"$fc$fr:$lc$lr";
    }

    
/**
     * Reads a cell range address in BIFF8 e.g. 'A2:B6' or 'A1'
     * always fixed range
     * section 2.5.14.
     *
     * @param string $subData
     *
     * @return string
     */
    
private function readBIFF8CellRangeAddressFixed($subData)
    {
        
// offset: 0; size: 2; index to first row
        
$fr self::getUInt2d($subData0) + 1;

        
// offset: 2; size: 2; index to last row
        
$lr self::getUInt2d($subData2) + 1;

        
// offset: 4; size: 2; index to first column
        
$fc self::getUInt2d($subData4);

        
// offset: 6; size: 2; index to last column
        
$lc self::getUInt2d($subData6);

        
// check values
        
if ($fr $lr || $fc $lc) {
            throw new 
Exception('Not a cell range address');
        }

        
// column index to letter
        
$fc Coordinate::stringFromColumnIndex($fc 1);
        
$lc Coordinate::stringFromColumnIndex($lc 1);

        if (
$fr == $lr && $fc == $lc) {
            return 
"$fc$fr";
        }

        return 
"$fc$fr:$lc$lr";
    }

    
/**
     * Reads a cell range address in BIFF8 e.g. 'A2:B6' or '$A$2:$B$6'
     * there are flags indicating whether column/row index is relative
     * section 3.3.4.
     *
     * @param string $subData
     *
     * @return string
     */
    
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))
        
$fr self::getUInt2d($subData0) + 1;

        
// offset: 2; size: 2; index to last row (0... 65535) (or offset (-32768... 32767))
        
$lr self::getUInt2d($subData2) + 1;

        
// offset: 4; size: 2; index to first column or column offset + relative flags

        // bit: 7-0; mask 0x00FF; column index
        
$fc Coordinate::stringFromColumnIndex((0x00FF self::getUInt2d($subData4)) + 1);

        
// bit: 14; mask 0x4000; (1 = relative column index, 0 = absolute column index)
        
if (!(0x4000 self::getUInt2d($subData4))) {
            
$fc '$' $fc;
        }

        
// bit: 15; mask 0x8000; (1 = relative row index, 0 = absolute row index)
        
if (!(0x8000 self::getUInt2d($subData4))) {
            
$fr '$' $fr;
        }

        
// offset: 6; size: 2; index to last column or column offset + relative flags

        // bit: 7-0; mask 0x00FF; column index
        
$lc Coordinate::stringFromColumnIndex((0x00FF self::getUInt2d($subData6)) + 1);

        
// bit: 14; mask 0x4000; (1 = relative column index, 0 = absolute column index)
        
if (!(0x4000 self::getUInt2d($subData6))) {
            
$lc '$' $lc;
        }

        
// bit: 15; mask 0x8000; (1 = relative row index, 0 = absolute row index)
        
if (!(0x8000 self::getUInt2d($subData6))) {
            
$lr '$' $lr;
        }

        return 
"$fc$fr:$lc$lr";
    }

    
/**
     * Reads a cell range address in BIFF8 for shared formulas. Uses positive and negative values for row and column
     * to indicate offsets from a base cell
     * section 3.3.4.
     *
     * @param string $subData
     * @param string $baseCell Base cell
     *
     * @return string Cell range address
     */
    
private function readBIFF8CellRangeAddressB($subData$baseCell 'A1')
    {
        [
$baseCol$baseRow] = Coordinate::coordinateFromString($baseCell);
        
$baseCol Coordinate::columnIndexFromString($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
        
$frIndex self::getUInt2d($subData0); // adjust below

        // offset: 2; size: 2; relative index to first row (0... 65535) should be treated as offset (-32768... 32767)
        
$lrIndex self::getUInt2d($subData2); // adjust below

        // bit: 14; mask 0x4000; (1 = relative column index, 0 = absolute column index)
        
if (!(0x4000 self::getUInt2d($subData4))) {
            
// absolute column index
            // offset: 4; size: 2; first column with relative/absolute flags
            // bit: 7-0; mask 0x00FF; column index
            
$fcIndex 0x00FF self::getUInt2d($subData4);
            
$fc Coordinate::stringFromColumnIndex($fcIndex 1);
            
$fc '$' $fc;
        } else {
            
// column offset
            // offset: 4; size: 2; first column with relative/absolute flags
            // bit: 7-0; mask 0x00FF; column index
            
$relativeFcIndex 0x00FF self::getInt2d($subData4);
            
$fcIndex $baseCol $relativeFcIndex;
            
$fcIndex = ($fcIndex 256) ? $fcIndex $fcIndex 256;
            
$fcIndex = ($fcIndex >= 0) ? $fcIndex $fcIndex 256;
            
$fc Coordinate::stringFromColumnIndex($fcIndex 1);
        }

        
// bit: 15; mask 0x8000; (1 = relative row index, 0 = absolute row index)
        
if (!(0x8000 self::getUInt2d($subData4))) {
            
// absolute row index
            
$fr $frIndex 1;
            
$fr '$' $fr;
        } else {
            
// row offset
            
$frIndex = ($frIndex <= 32767) ? $frIndex $frIndex 65536;
            
$fr $baseRow $frIndex;
        }

        
// bit: 14; mask 0x4000; (1 = relative column index, 0 = absolute column index)
        
if (!(0x4000 self::getUInt2d($subData6))) {
            
// absolute column index
            // offset: 6; size: 2; last column with relative/absolute flags
            // bit: 7-0; mask 0x00FF; column index
            
$lcIndex 0x00FF self::getUInt2d($subData6);
            
$lc Coordinate::stringFromColumnIndex($lcIndex 1);
            
$lc '$' $lc;
        } else {
            
// column offset
            // offset: 4; size: 2; first column with relative/absolute flags
            // bit: 7-0; mask 0x00FF; column index
            
$relativeLcIndex 0x00FF self::getInt2d($subData4);
            
$lcIndex $baseCol $relativeLcIndex;
            
$lcIndex = ($lcIndex 256) ? $lcIndex $lcIndex 256;
            
$lcIndex = ($lcIndex >= 0) ? $lcIndex $lcIndex 256;
            
$lc Coordinate::stringFromColumnIndex($lcIndex 1);
        }

        
// bit: 15; mask 0x8000; (1 = relative row index, 0 = absolute row index)
        
if (!(0x8000 self::getUInt2d($subData6))) {
            
// 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";
    }

    
/**
     * Read BIFF8 cell range address list
     * section 2.5.15.
     *
     * @param string $subData
     *
     * @return array
     */
    
private function readBIFF8CellRangeAddressList($subData)
    {
        
$cellRangeAddresses = [];

        
// offset: 0; size: 2; number of the following cell range addresses
        
$nm self::getUInt2d($subData0);

        
$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$offset8));
            
$offset += 8;
        }

        return [
            
'size' => $nm,
            
'cellRangeAddresses' => $cellRangeAddresses,
        ];
    }

    
/**
     * Read BIFF5 cell range address list
     * section 2.5.15.
     *
     * @param string $subData
     *
     * @return array
     */
    
private function readBIFF5CellRangeAddressList($subData)
    {
        
$cellRangeAddresses = [];

        
// offset: 0; size: 2; number of the following cell range addresses
        
$nm self::getUInt2d($subData0);

        
$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$offset6));
            
$offset += 6;
        }

        return [
            
'size' => $nm,
            
'cellRangeAddresses' => $cellRangeAddresses,
        ];
    }

    
/**
     * Get a sheet range like Sheet1:Sheet3 from REF index
     * Note: If there is only one sheet in the range, one gets e.g Sheet1
     * It can also happen that the REF structure uses the -1 (FFFF) code to indicate deleted sheets,
     * in which case an Exception is thrown.
     *
     * @param int $index
     *
     * @return false|string
     */
    
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 || $this->ref[$index]['lastSheetIndex'] == 0xFFFF) {
                        throw new 
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("/[ !\"@#£$%&{()}<>=+'|^,;-]/u"$sheetRange)) {
                        
$sheetRange "'$sheetRange'";
                    }

                    return 
$sheetRange;

                    break;
                default:
                    
// TODO: external sheet support
                    
throw new Exception('Xls reader only supports internal sheets in formulas');

                    break;
            }
        }

        return 
false;
    }

    
/**
     * read BIFF8 constant value array from array data
     * returns e.g. ['value' => '{1,2;3,4}', 'size' => 40]
     * section 2.5.8.
     *
     * @param string $arrayData
     *
     * @return array
     */
    
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
        
$nr self::getUInt2d($arrayData1);
        
$size 3// initialize
        
$arrayData substr($arrayData3);

        
// offset: 3; size: var; list of ($nc + 1) * ($nr + 1) constant values
        
$matrixChunks = [];
        for (
$r 1$r <= $nr 1; ++$r) {
            
$items = [];
            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 [
            
'value' => $matrix,
            
'size' => $size,
        ];
    }

    
/**
     * read BIFF8 constant value which may be 'Empty Value', 'Number', 'String Value', 'Boolean Value', 'Error Value'
     * section 2.5.7
     * returns e.g. ['value' => '5', 'size' => 9].
     *
     * @param string $valueData
     *
     * @return array
     */
    
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
                
$value self::extractNumber(substr($valueData18));
                
$size 9;

                break;
            case 
0x02// string value
                // offset: 1; size: var; Unicode string, 16-bit string length
                
$string self::readUnicodeStringLong(substr($valueData1));
                
$value '"' $string['value'] . '"';
                
$size $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
                
$value Xls\ErrorCode::lookup(ord($valueData[1]));
                
$size 9;

                break;
        }

        return [
            
'value' => $value,
            
'size' => $size,
        ];
    }

    
/**
     * Extract RGB color
     * OpenOffice.org's Documentation of the Microsoft Excel File Format, section 2.5.4.
     *
     * @param string $rgb Encoded RGB value (4 bytes)
     *
     * @return array
     */
    
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 [
'rgb' => $rgb];
    }

    
/**
     * Read byte string (8-bit string length)
     * OpenOffice documentation: 2.5.2.
     *
     * @param string $subData
     *
     * @return array
     */
    
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 $this->decodeCodepage(substr($subData1$ln));

        return [
            
'value' => $value,
            
'size' => $ln// size in bytes of data structure
        
];
    }

    
/**
     * Read byte string (16-bit string length)
     * OpenOffice documentation: 2.5.2.
     *
     * @param string $subData
     *
     * @return array
     */
    
private function readByteStringLong($subData)
    {
        
// offset: 0; size: 2; length of the string (character count)
        
$ln self::getUInt2d($subData0);

        
// offset: 2: size: var; character array (8-bit characters)
        
$value $this->decodeCodepage(substr($subData2));

        
//return $string;
        
return [
            
'value' => $value,
            
'size' => $ln// size in bytes of data structure
        
];
    }

    
/**
     * Extracts an Excel Unicode short string (8-bit string length)
     * OpenOffice documentation: 2.5.3
     * function will automatically find out where the Unicode string ends.
     *
     * @param string $subData
     *
     * @return array
     */
    
private static function readUnicodeStringShort($subData)
    {
        
$value '';

        
// offset: 0: size: 1; length of the string (character count)
        
$characterCount ord($subData[0]);

        
$string self::readUnicodeString(substr($subData1), $characterCount);

        
// add 1 for the string length
        
++$string['size'];

        return 
$string;
    }

    
/**
     * Extracts an Excel Unicode long string (16-bit string length)
     * OpenOffice documentation: 2.5.3
     * this function is under construction, needs to support rich text, and Asian phonetic settings.
     *
     * @param string $subData
     *
     * @return array
     */
    
private static function readUnicodeStringLong($subData)
    {
        
$value '';

        
// offset: 0: size: 2; length of the string (character count)
        
$characterCount self::getUInt2d($subData0);

        
$string self::readUnicodeString(substr($subData2), $characterCount);

        
// add 2 for the string length
        
$string['size'] += 2;

        return 
$string;
    }

    
/**
     * Read Unicode string with no string length field, but with known character count
     * this function is under construction, needs to support rich text, and Asian phonetic settings
     * OpenOffice.org's Documentation of the Microsoft Excel File Format, section 2.5.3.
     *
     * @param string $subData
     * @param int $characterCount
     *
     * @return array
     */
    
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
        
$value self::encodeUTF16(substr($subData1$isCompressed $characterCount $characterCount), $isCompressed);

        return [
            
'value' => $value,
            
'size' => $isCompressed $characterCount $characterCount// the size in bytes including the option flags
        
];
    }

    
/**
     * Convert UTF-8 string to string surounded by double quotes. Used for explicit string tokens in formulas.
     * Example:  hello"world  -->  "hello""world".
     *
     * @param string $value UTF-8 encoded string
     *
     * @return string
     */
    
private static function UTF8toExcelDoubleQuoted($value)
    {
        return 
'"' str_replace('"''""'$value) . '"';
    }

    
/**
     * Reads first 8 bytes of a string and return IEEE 754 float.
     *
     * @param string $data Binary string that is at least 8 bytes long
     *
     * @return float
     */
    
private static function extractNumber($data)
    {
        
$rknumhigh self::getInt4d($data4);
        
$rknumlow self::getInt4d($data0);
        
$sign = ($rknumhigh 0x80000000) >> 31;
        
$exp = (($rknumhigh 0x7ff00000) >> 20) - 1023;
        
$mantissa = (0x100000 | ($rknumhigh 0x000fffff));
        
$mantissalow1 = ($rknumlow 0x80000000) >> 31;
        
$mantissalow2 = ($rknumlow 0x7fffffff);
        
$value $mantissa ** (20 $exp);

        if (
$mantissalow1 != 0) {
            
$value += ** (21 $exp);
        }

        
$value += $mantissalow2 ** (52 $exp);
        if (
$sign) {
            
$value *= -1;
        }

        return 
$value;
    }

    
/**
     * @param int $rknum
     *
     * @return float
     */
    
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 $mantissa ** (20 - ($exp 1023));
            if (
$sign) {
                
$value = -$value;
            }
            
//end of changes by mmp
        
}
        if ((
$rknum 0x01) != 0) {
            
$value /= 100;
        }

        return 
$value;
    }

    
/**
     * Get UTF-8 string from (compressed or uncompressed) UTF-16 string.
     *
     * @param string $string
     * @param bool $compressed
     *
     * @return string
     */
    
private static function encodeUTF16($string$compressed false)
    {
        if (
$compressed) {
            
$string self::uncompressByteString($string);
        }

        return 
StringHelper::convertEncoding($string'UTF-8''UTF-16LE');
    }

    
/**
     * Convert UTF-16 string in compressed notation to uncompressed form. Only used for BIFF8.
     *
     * @param string $string
     *
     * @return string
     */
    
private static function uncompressByteString($string)
    {
        
$uncompressedString '';
        
$strLen strlen($string);
        for (
$i 0$i $strLen; ++$i) {
            
$uncompressedString .= $string[$i] . "\0";
        }

        return 
$uncompressedString;
    }

    
/**
     * Convert string to UTF-8. Only used for BIFF5.
     *
     * @param string $string
     *
     * @return string
     */
    
private function decodeCodepage($string)
    {
        return 
StringHelper::convertEncoding($string'UTF-8'$this->codepage);
    }

    
/**
     * Read 16-bit unsigned integer.
     *
     * @param string $data
     * @param int $pos
     *
     * @return int
     */
    
public static function getUInt2d($data$pos)
    {
        return 
ord($data[$pos]) | (ord($data[$pos 1]) << 8);
    }

    
/**
     * Read 16-bit signed integer.
     *
     * @param string $data
     * @param int $pos
     *
     * @return int
     */
    
public static function getInt2d($data$pos)
    {
        return 
unpack('s'$data[$pos] . $data[$pos 1])[1];
    }

    
/**
     * Read 32-bit signed integer.
     *
     * @param string $data
     * @param int $pos
     *
     * @return int
     */
    
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
        // Changed 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 function 
parseRichText($is)
    {
        
$value = new RichText();
        
$value->createText($is);

        return 
$value;
    }
}

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