112 lines
2.8 KiB
PHP
112 lines
2.8 KiB
PHP
|
<?php
|
||
|
|
|
||
|
|
/**
|
||
|
|
* PHPExcel_Calculation_Token_Stack
|
||
|
|
*
|
||
|
|
* 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_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;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* 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'] = $localeFunction;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Pop the last entry from the stack
|
||
|
|
*
|
||
|
|
* @return mixed
|
||
|
|
*/
|
||
|
|
public function pop()
|
||
|
|
{
|
||
|
|
if ($this->count > 0) {
|
||
|
|
return $this->stack[--$this->count];
|
||
|
|
}
|
||
|
|
return null;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* 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];
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Clear the stack
|
||
|
|
*/
|
||
|
|
public function clear()
|
||
|
|
{
|
||
|
|
$this->stack = array();
|
||
|
|
$this->count = 0;
|
||
|
|
}
|
||
|
|
}
|