59 lines
1.6 KiB
PHP
59 lines
1.6 KiB
PHP
|
<?php
|
||
|
|
/**
|
||
|
|
* PHPExcel
|
||
|
|
*
|
||
|
|
* Copyright (c) 2006 - 2012 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 - 2012 PHPExcel (http://www.codeplex.com/PHPExcel)
|
||
|
|
* @license http://www.gnu.org/licenses/old-licenses/lgpl-2.1.txt LGPL
|
||
|
|
* @version ##VERSION##, ##DATE##
|
||
|
|
*/
|
||
|
|
|
||
|
|
|
||
|
|
class PHPExcel_CalcEngine_CyclicReferenceStack {
|
||
|
|
|
||
|
|
private $_stack = array();
|
||
|
|
|
||
|
|
|
||
|
|
public function count() {
|
||
|
|
return count($this->_stack);
|
||
|
|
}
|
||
|
|
|
||
|
|
public function push($value) {
|
||
|
|
$this->_stack[] = $value;
|
||
|
|
} // function push()
|
||
|
|
|
||
|
|
public function pop() {
|
||
|
|
return array_pop($this->_stack);
|
||
|
|
} // function pop()
|
||
|
|
|
||
|
|
public function onStack($value) {
|
||
|
|
return in_array($value,$this->_stack);
|
||
|
|
}
|
||
|
|
|
||
|
|
public function clear() {
|
||
|
|
$this->_stack = array();
|
||
|
|
} // function push()
|
||
|
|
|
||
|
|
public function showStack() {
|
||
|
|
return $this->_stack;
|
||
|
|
}
|
||
|
|
|
||
|
|
} // class PHPExcel_CalcEngine_CyclicReferenceStack
|