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Filename : DataType.php
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<?php

/**
 * PHPExcel_Cell_DataType
 *
 * Copyright (c) 2006 - 2015 PHPExcel
 *
 * 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., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 *
 * @category   PHPExcel
 * @package    PHPExcel_Cell
 * @copyright  Copyright (c) 2006 - 2015 PHPExcel (http://www.codeplex.com/PHPExcel)
 * @license    http://www.gnu.org/licenses/old-licenses/lgpl-2.1.txt    LGPL
 * @version    ##VERSION##, ##DATE##
 */
class PHPExcel_Cell_DataType
{
    /* Data types */
    const TYPE_STRING2  = 'str';
    const TYPE_STRING   = 's';
    const TYPE_FORMULA  = 'f';
    const TYPE_NUMERIC  = 'n';
    const TYPE_BOOL     = 'b';
    const TYPE_NULL     = 'null';
    const TYPE_INLINE   = 'inlineStr';
    const TYPE_ERROR    = 'e';

    /**
     * List of error codes
     *
     * @var array
     */
    private static $errorCodes = array(
        '#NULL!'  => 0,
        '#DIV/0!' => 1,
        '#VALUE!' => 2,
        '#REF!'   => 3,
        '#NAME?'  => 4,
        '#NUM!'   => 5,
        '#N/A'    => 6
    );

    /**
     * Get list of error codes
     *
     * @return array
     */
    public static function getErrorCodes()
    {
        return self::$errorCodes;
    }

    /**
     * DataType for value
     *
     * @deprecated  Replaced by PHPExcel_Cell_IValueBinder infrastructure, will be removed in version 1.8.0
     * @param       mixed  $pValue
     * @return      string
     */
    public static function dataTypeForValue($pValue = null)
    {
        return PHPExcel_Cell_DefaultValueBinder::dataTypeForValue($pValue);
    }

    /**
     * Check a string that it satisfies Excel requirements
     *
     * @param  mixed  Value to sanitize to an Excel string
     * @return mixed  Sanitized value
     */
    public static function checkString($pValue = null)
    {
        if ($pValue instanceof PHPExcel_RichText) {
            // TODO: Sanitize Rich-Text string (max. character count is 32,767)
            return $pValue;
        }

        // string must never be longer than 32,767 characters, truncate if necessary
        $pValue = PHPExcel_Shared_String::Substring($pValue, 0, 32767);

        // we require that newline is represented as "\n" in core, not as "\r\n" or "\r"
        $pValue = str_replace(array("\r\n", "\r"), "\n", $pValue);

        return $pValue;
    }

    /**
     * Check a value that it is a valid error code
     *
     * @param  mixed   Value to sanitize to an Excel error code
     * @return string  Sanitized value
     */
    public static function checkErrorCode($pValue = null)
    {
        $pValue = (string) $pValue;

        if (!array_key_exists($pValue, self::$errorCodes)) {
            $pValue = '#NULL!';
        }

        return $pValue;
    }
}