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94 lines
2.2 KiB
94 lines
2.2 KiB
<?php |
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/** |
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* PHPExcel_CalcEngine_CyclicReferenceStack |
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* |
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* Copyright (c) 2006 - 2015 PHPExcel |
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* |
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* This library is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* This library is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with this library; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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* |
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* @category PHPExcel |
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* @package PHPExcel_Calculation |
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* @copyright Copyright (c) 2006 - 2015 PHPExcel (http://www.codeplex.com/PHPExcel) |
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* @license http://www.gnu.org/licenses/old-licenses/lgpl-2.1.txt LGPL |
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* @version ##VERSION##, ##DATE## |
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*/ |
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class PHPExcel_CalcEngine_CyclicReferenceStack |
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{ |
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/** |
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* The call stack for calculated cells |
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* |
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* @var mixed[] |
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*/ |
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private $stack = array(); |
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/** |
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* Return the number of entries on the stack |
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* |
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* @return integer |
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*/ |
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public function count() |
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{ |
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return count($this->stack); |
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} |
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/** |
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* Push a new entry onto the stack |
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* |
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* @param mixed $value |
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*/ |
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public function push($value) |
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{ |
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$this->stack[$value] = $value; |
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} |
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/** |
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* Pop the last entry from the stack |
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* |
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* @return mixed |
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*/ |
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public function pop() |
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{ |
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return array_pop($this->stack); |
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} |
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/** |
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* Test to see if a specified entry exists on the stack |
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* |
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* @param mixed $value The value to test |
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*/ |
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public function onStack($value) |
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{ |
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return isset($this->stack[$value]); |
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} |
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/** |
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* Clear the stack |
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*/ |
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public function clear() |
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{ |
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$this->stack = array(); |
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} |
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/** |
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* Return an array of all entries on the stack |
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* |
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* @return mixed[] |
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*/ |
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public function showStack() |
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{ |
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return $this->stack; |
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} |
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}
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