Stack.php in Loft Data Grids 7.2

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vendor/phpoffice/phpexcel/Classes/PHPExcel/Calculation/Token/Stack.php

<?php

/**
 * PHPExcel
 *
 * Copyright (c) 2006 - 2014 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 - 2014 PHPExcel (http://www.codeplex.com/PHPExcel)
 * @license	http://www.gnu.org/licenses/old-licenses/lgpl-2.1.txt	LGPL
 * @version	##VERSION##, ##DATE##
 */

/**
 * PHPExcel_Calculation_Token_Stack
 *
 * @category	PHPExcel_Calculation_Token_Stack
 * @package		PHPExcel_Calculation
 * @copyright	Copyright (c) 2006 - 2014 PHPExcel (http://www.codeplex.com/PHPExcel)
 */
class PHPExcel_Calculation_Token_Stack {

  /**
   *  The parser stack for formulae
   *
   *  @var mixed[]
   */
  private $_stack = array();

  /**
   *  Count of entries in the parser stack
   *
   *  @var integer
   */
  private $_count = 0;

  /**
   * Return the number of entries on the stack
   *
   * @return  integer
   */
  public function count() {
    return $this->_count;
  }

  //	function count()

  /**
   * Push a new entry onto the stack
   *
   * @param  mixed  $type
   * @param  mixed  $value
   * @param  mixed  $reference
   */
  public function push($type, $value, $reference = NULL) {
    $this->_stack[$this->_count++] = array(
      'type' => $type,
      'value' => $value,
      'reference' => $reference,
    );
    if ($type == 'Function') {
      $localeFunction = PHPExcel_Calculation::_localeFunc($value);
      if ($localeFunction != $value) {
        $this->_stack[$this->_count - 1]['localeValue'] = $localeFunction;
      }
    }
  }

  //	function push()

  /**
   * Pop the last entry from the stack
   *
   * @return  mixed
   */
  public function pop() {
    if ($this->_count > 0) {
      return $this->_stack[--$this->_count];
    }
    return NULL;
  }

  //	function pop()

  /**
   * Return an entry from the stack without removing it
   *
   * @param   integer  $n  number indicating how far back in the stack we want to look
   * @return  mixed
   */
  public function last($n = 1) {
    if ($this->_count - $n < 0) {
      return NULL;
    }
    return $this->_stack[$this->_count - $n];
  }

  //	function last()

  /**
   * Clear the stack
   */
  function clear() {
    $this->_stack = array();
    $this->_count = 0;
  }

}

//	class PHPExcel_Calculation_Token_Stack

Classes

Name	Description
PHPExcel_Calculation_Token_Stack	PHPExcel_Calculation_Token_Stack