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<?php

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

/**
 * PHPExcel_Calculation_Logical
 *
 * 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_Calculation
 * @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_Calculation_Logical
{
    /**
     * TRUE
     *
     * Returns the boolean TRUE.
     *
     * Excel Function:
     *        =TRUE()
     *
     * @access    public
     * @category Logical Functions
     * @return    boolean        True
     */
    public static function TRUE()
    {
        return true;
    }

/**
     * FALSE
     *
     * Returns the boolean FALSE.
     *
     * Excel Function:
     *        =FALSE()
     *
     * @access    public
     * @category Logical Functions
     * @return    boolean        False
     */
    public static function FALSE()
    {
        return false;
    }

/**
     * LOGICAL_AND
     *
     * Returns boolean TRUE if all its arguments are TRUE; returns FALSE if one or more argument is FALSE.
     *
     * Excel Function:
     *        =AND(logical1[,logical2[, ...]])
     *
     *        The arguments must evaluate to logical values such as TRUE or FALSE, or the arguments must be arrays
     *            or references that contain logical values.
     *
     *        Boolean arguments are treated as True or False as appropriate
     *        Integer or floating point arguments are treated as True, except for 0 or 0.0 which are False
     *        If any argument value is a string, or a Null, the function returns a #VALUE! error, unless the string holds
     *            the value TRUE or FALSE, in which case it is evaluated as the corresponding boolean value
     *
     * @access    public
     * @category Logical Functions
     * @param    mixed        $arg,...        Data values
     * @return    boolean        The logical AND of the arguments.
     */
    public static function LOGICAL_AND()
    {
        // Return value
        $returnValue = true;

// Loop through the arguments
        $aArgs = PHPExcel_Calculation_Functions::flattenArray(func_get_args());
        $argCount = -1;
        foreach ($aArgs as $argCount => $arg) {
            // Is it a boolean value?
            if (is_bool($arg)) {
                $returnValue = $returnValue && $arg;
            } elseif ((is_numeric($arg)) && (!is_string($arg))) {
                $returnValue = $returnValue && ($arg != 0);
            } elseif (is_string($arg)) {
                $arg = strtoupper($arg);
                if (($arg == 'TRUE') || ($arg == PHPExcel_Calculation::getTRUE())) {
                    $arg = true;
                } elseif (($arg == 'FALSE') || ($arg == PHPExcel_Calculation::getFALSE())) {
                    $arg = false;
                } else {
                    return PHPExcel_Calculation_Functions::VALUE();
                }
                $returnValue = $returnValue && ($arg != 0);
            }
        }

// Return
        if ($argCount < 0) {
            return PHPExcel_Calculation_Functions::VALUE();
        }
        return $returnValue;
    }

/**
     * LOGICAL_OR
     *
     * Returns boolean TRUE if any argument is TRUE; returns FALSE if all arguments are FALSE.
     *
     * Excel Function:
     *        =OR(logical1[,logical2[, ...]])
     *
     *        The arguments must evaluate to logical values such as TRUE or FALSE, or the arguments must be arrays
     *            or references that contain logical values.
     *
     *        Boolean arguments are treated as True or False as appropriate
     *        Integer or floating point arguments are treated as True, except for 0 or 0.0 which are False
     *        If any argument value is a string, or a Null, the function returns a #VALUE! error, unless the string holds
     *            the value TRUE or FALSE, in which case it is evaluated as the corresponding boolean value
     *
     * @access    public
     * @category Logical Functions
     * @param    mixed        $arg,...        Data values
     * @return    boolean        The logical OR of the arguments.
     */
    public static function LOGICAL_OR()
    {
        // Return value
        $returnValue = false;

// Loop through the arguments
        $aArgs = PHPExcel_Calculation_Functions::flattenArray(func_get_args());
        $argCount = -1;
        foreach ($aArgs as $argCount => $arg) {
            // Is it a boolean value?
            if (is_bool($arg)) {
                $returnValue = $returnValue || $arg;
            } elseif ((is_numeric($arg)) && (!is_string($arg))) {
                $returnValue = $returnValue || ($arg != 0);
            } elseif (is_string($arg)) {
                $arg = strtoupper($arg);
                if (($arg == 'TRUE') || ($arg == PHPExcel_Calculation::getTRUE())) {
                    $arg = true;
                } elseif (($arg == 'FALSE') || ($arg == PHPExcel_Calculation::getFALSE())) {
                    $arg = false;
                } else {
                    return PHPExcel_Calculation_Functions::VALUE();
                }
                $returnValue = $returnValue || ($arg != 0);
            }
        }

// Return
        if ($argCount < 0) {
            return PHPExcel_Calculation_Functions::VALUE();
        }
        return $returnValue;
    }

/**
     * NOT
     *
     * Returns the boolean inverse of the argument.
     *
     * Excel Function:
     *        =NOT(logical)
     *
     *        The argument must evaluate to a logical value such as TRUE or FALSE
     *
     *        Boolean arguments are treated as True or False as appropriate
     *        Integer or floating point arguments are treated as True, except for 0 or 0.0 which are False
     *        If any argument value is a string, or a Null, the function returns a #VALUE! error, unless the string holds
     *            the value TRUE or FALSE, in which case it is evaluated as the corresponding boolean value
     *
     * @access    public
     * @category Logical Functions
     * @param    mixed        $logical    A value or expression that can be evaluated to TRUE or FALSE
     * @return    boolean        The boolean inverse of the argument.
     */
    public static function NOT($logical = false)
    {
        $logical = PHPExcel_Calculation_Functions::flattenSingleValue($logical);
        if (is_string($logical)) {
            $logical = strtoupper($logical);
            if (($logical == 'TRUE') || ($logical == PHPExcel_Calculation::getTRUE())) {
                return false;
            } elseif (($logical == 'FALSE') || ($logical == PHPExcel_Calculation::getFALSE())) {
                return true;
            } else {
                return PHPExcel_Calculation_Functions::VALUE();
            }
        }

return !$logical;
    }

/**
     * STATEMENT_IF
     *
     * Returns one value if a condition you specify evaluates to TRUE and another value if it evaluates to FALSE.
     *
     * Excel Function:
     *        =IF(condition[,returnIfTrue[,returnIfFalse]])
     *
     *        Condition is any value or expression that can be evaluated to TRUE or FALSE.
     *            For example, A10=100 is a logical expression; if the value in cell A10 is equal to 100,
     *            the expression evaluates to TRUE. Otherwise, the expression evaluates to FALSE.
     *            This argument can use any comparison calculation operator.
     *        ReturnIfTrue is the value that is returned if condition evaluates to TRUE.
     *            For example, if this argument is the text string "Within budget" and the condition argument evaluates to TRUE,
     *            then the IF function returns the text "Within budget"
     *            If condition is TRUE and ReturnIfTrue is blank, this argument returns 0 (zero). To display the word TRUE, use
     *            the logical value TRUE for this argument.
     *            ReturnIfTrue can be another formula.
     *        ReturnIfFalse is the value that is returned if condition evaluates to FALSE.
     *            For example, if this argument is the text string "Over budget" and the condition argument evaluates to FALSE,
     *            then the IF function returns the text "Over budget".
     *            If condition is FALSE and ReturnIfFalse is omitted, then the logical value FALSE is returned.
     *            If condition is FALSE and ReturnIfFalse is blank, then the value 0 (zero) is returned.
     *            ReturnIfFalse can be another formula.
     *
     * @access    public
     * @category Logical Functions
     * @param    mixed    $condition        Condition to evaluate
     * @param    mixed    $returnIfTrue    Value to return when condition is true
     * @param    mixed    $returnIfFalse    Optional value to return when condition is false
     * @return    mixed    The value of returnIfTrue or returnIfFalse determined by condition
     */
    public static function STATEMENT_IF($condition = true, $returnIfTrue = 0, $returnIfFalse = false)
    {
        $condition     = (is_null($condition))     ? true :  (boolean) PHPExcel_Calculation_Functions::flattenSingleValue($condition);
        $returnIfTrue  = (is_null($returnIfTrue))  ? 0 :     PHPExcel_Calculation_Functions::flattenSingleValue($returnIfTrue);
        $returnIfFalse = (is_null($returnIfFalse)) ? false : PHPExcel_Calculation_Functions::flattenSingleValue($returnIfFalse);

return ($condition) ? $returnIfTrue : $returnIfFalse;
    }

/**
     * IFERROR
     *
     * Excel Function:
     *        =IFERROR(testValue,errorpart)
     *
     * @access    public
     * @category Logical Functions
     * @param    mixed    $testValue    Value to check, is also the value returned when no error
     * @param    mixed    $errorpart    Value to return when testValue is an error condition
     * @return    mixed    The value of errorpart or testValue determined by error condition
     */
    public static function IFERROR($testValue = '', $errorpart = '')
    {
        $testValue = (is_null($testValue)) ? '' : PHPExcel_Calculation_Functions::flattenSingleValue($testValue);
        $errorpart = (is_null($errorpart)) ? '' : PHPExcel_Calculation_Functions::flattenSingleValue($errorpart);

return self::STATEMENT_IF(PHPExcel_Calculation_Functions::IS_ERROR($testValue), $errorpart, $testValue);
    }
}