vendor/phpoffice/phpspreadsheet/src/PhpSpreadsheet/Writer/Xls/BIFFwriter.php

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<?php

namespace PhpOffice\PhpSpreadsheet\Writer\Xls;

use PhpOffice\PhpSpreadsheet\Writer\Exception as WriterException;

// Original file header of PEAR::Spreadsheet_Excel_Writer_BIFFwriter (used as the base for this class):
// -----------------------------------------------------------------------------------------
// *  Module written/ported by Xavier Noguer <xnoguer@rezebra.com>
// *
// *  The majority of this is _NOT_ my code.  I simply ported it from the
// *  PERL Spreadsheet::WriteExcel module.
// *
// *  The author of the Spreadsheet::WriteExcel module is John McNamara
// *  <jmcnamara@cpan.org>
// *
// *  I _DO_ maintain this code, and John McNamara has nothing to do with the
// *  porting of this code to PHP.  Any questions directly related to this
// *  class library should be directed to me.
// *
// *  License Information:
// *
// *    Spreadsheet_Excel_Writer:  A library for generating Excel Spreadsheets
// *    Copyright (c) 2002-2003 Xavier Noguer xnoguer@rezebra.com
// *
// *    This library is free software; you can redistribute it and/or
// *    modify it under the terms of the GNU Lesser General Public
// *    License as published by the Free Software Foundation; either
// *    version 2.1 of the License, or (at your option) any later version.
// *
// *    This library is distributed in the hope that it will be useful,
// *    but WITHOUT ANY WARRANTY; without even the implied warranty of
// *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// *    Lesser General Public License for more details.
// *
// *    You should have received a copy of the GNU Lesser General Public
// *    License along with this library; if not, write to the Free Software
// *    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
// */
class BIFFwriter
{
    /**
     * The byte order of this architecture. 0 => little endian, 1 => big endian.
     *
     * @var int
     */
    private static $byteOrder;

    /**
     * The string containing the data of the BIFF stream.
     *
     * @var string
     */
    public $_data;

    /**
     * The size of the data in bytes. Should be the same as strlen($this->_data).
     *
     * @var int
     */