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Filename : number_helper.php
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<?php
/**
 * CodeIgniter
 *
 * An open source application development framework for PHP
 *
 * This content is released under the MIT License (MIT)
 *
 * Copyright (c) 2014 - 2019, British Columbia Institute of Technology
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 *
 * @package	CodeIgniter
 * @author	EllisLab Dev Team
 * @copyright	Copyright (c) 2008 - 2014, EllisLab, Inc. (https://ellislab.com/)
 * @copyright	Copyright (c) 2014 - 2019, British Columbia Institute of Technology (https://bcit.ca/)
 * @license	https://opensource.org/licenses/MIT	MIT License
 * @link	https://codeigniter.com
 * @since	Version 1.0.0
 * @filesource
 */
defined('BASEPATH') OR exit('No direct script access allowed');

/**
 * CodeIgniter Number Helpers
 *
 * @package		CodeIgniter
 * @subpackage	Helpers
 * @category	Helpers
 * @author		EllisLab Dev Team
 * @link		https://codeigniter.com/user_guide/helpers/number_helper.html
 */

// ------------------------------------------------------------------------

if ( ! function_exists('byte_format'))
{
	/**
	 * Formats a numbers as bytes, based on size, and adds the appropriate suffix
	 *
	 * @param	mixed	will be cast as int
	 * @param	int
	 * @return	string
	 */
	function byte_format($num, $precision = 1)
	{
		$CI =& get_instance();
		$CI->lang->load('number');

		if ($num >= 1000000000000)
		{
			$num = round($num / 1099511627776, $precision);
			$unit = $CI->lang->line('terabyte_abbr');
		}
		elseif ($num >= 1000000000)
		{
			$num = round($num / 1073741824, $precision);
			$unit = $CI->lang->line('gigabyte_abbr');
		}
		elseif ($num >= 1000000)
		{
			$num = round($num / 1048576, $precision);
			$unit = $CI->lang->line('megabyte_abbr');
		}
		elseif ($num >= 1000)
		{
			$num = round($num / 1024, $precision);
			$unit = $CI->lang->line('kilobyte_abbr');
		}
		else
		{
			$unit = $CI->lang->line('bytes');
			return number_format($num).' '.$unit;
		}

		return number_format($num, $precision).' '.$unit;
	}
}