<?php
namespace FluidTYPO3\Vhs\ViewHelpers\Math;

/*
 * This file is part of the FluidTYPO3/Vhs project under GPLv2 or later.
 *
 * For the full copyright and license information, please read the
 * LICENSE.md file that was distributed with this source code.
 */

/**
 * Math: Round
 *
 * Rounds off $a which can be either an array-accessible
 * value (Iterator+ArrayAccess || array) or a raw numeric
 * value.
 *
 * @author Claus Due <claus@namelesscoder.net>
 * @package Vhs
 * @subpackage ViewHelpers\Math
 */
class RoundViewHelper extends AbstractSingleMathViewHelper {

	/**
	 * @return void
	 */
	public function initializeArguments() {
		parent::initializeArguments();
		$this->registerArgument('decimals', 'integer', 'Number of decimals', FALSE, 0);
	}

	/**
	 * @param mixed $a
	 * @return integer
	 */
	protected function calculateAction($a) {
		return round($a, $this->arguments['decimals']);
	}

}