New file |
0,0 → 1,98 |
<?php |
/** |
* PHPExcel |
* |
* Copyright (c) 2006 - 2013 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 - 2013 PHPExcel (http://www.codeplex.com/PHPExcel) |
* @license http://www.gnu.org/licenses/old-licenses/lgpl-2.1.txt LGPL |
* @version ##VERSION##, ##DATE## |
*/ |
|
|
/** |
* PHPExcel_CalcEngine_CyclicReferenceStack |
* |
* @category PHPExcel_CalcEngine_CyclicReferenceStack |
* @package PHPExcel_Calculation |
* @copyright Copyright (c) 2006 - 2013 PHPExcel (http://www.codeplex.com/PHPExcel) |
*/ |
class PHPExcel_CalcEngine_CyclicReferenceStack { |
|
/** |
* The call stack for calculated cells |
* |
* @var mixed[] |
*/ |
private $_stack = array(); |
|
|
/** |
* Return the number of entries on the stack |
* |
* @return integer |
*/ |
public function count() { |
return count($this->_stack); |
} |
|
/** |
* Push a new entry onto the stack |
* |
* @param mixed $value |
*/ |
public function push($value) { |
$this->_stack[] = $value; |
} // function push() |
|
/** |
* Pop the last entry from the stack |
* |
* @return mixed |
*/ |
public function pop() { |
return array_pop($this->_stack); |
} // function pop() |
|
/** |
* Test to see if a specified entry exists on the stack |
* |
* @param mixed $value The value to test |
*/ |
public function onStack($value) { |
return in_array($value, $this->_stack); |
} |
|
/** |
* Clear the stack |
*/ |
public function clear() { |
$this->_stack = array(); |
} // function push() |
|
/** |
* Return an array of all entries on the stack |
* |
* @return mixed[] |
*/ |
public function showStack() { |
return $this->_stack; |
} |
|
} // class PHPExcel_CalcEngine_CyclicReferenceStack |