103 lines
2.4 KiB
PHP
103 lines
2.4 KiB
PHP
<?php
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/**
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* @package Joomla.Component.Builder
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*
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* @created 3rd September, 2020
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* @author Llewellyn van der Merwe <https://dev.vdm.io>
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* @git Joomla Component Builder <https://git.vdm.dev/joomla/Component-Builder>
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* @copyright Copyright (C) 2015 Vast Development Method. All rights reserved.
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* @license GNU General Public License version 2 or later; see LICENSE.txt
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*/
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namespace VDM\Joomla\Utilities;
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/**
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* Basic Math Helper
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*
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* @since 3.0.9
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*/
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abstract class MathHelper
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{
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/**
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* bc math wrapper (very basic not for accounting)
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*
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* @param string $type The type bc math
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* @param int $val1 The first value
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* @param int $val2 The second value
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* @param int $scale The scale value
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*
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* @return string|int|null|bool
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*
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* @since 3.0.9
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*/
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public static function bc($type, $val1, $val2, $scale = 0)
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{
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// Validate input
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if (!is_numeric($val1) || !is_numeric($val2))
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{
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return null;
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}
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// Build function name
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$function = 'bc' . $type;
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// Use the bcmath function if available
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if (is_callable($function))
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{
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return $function($val1, $val2, $scale);
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}
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// if function does not exist we use +-*/ operators (fallback - not ideal)
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switch ($type)
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{
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case 'mul':
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return (string) round($val1 * $val2, $scale);
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case 'div':
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if ($val2 == 0) return null; // Avoid division by zero
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return (string) round($val1 / $val2, $scale);
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case 'add':
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return (string) round($val1 + $val2, $scale);
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case 'sub':
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return (string) round($val1 - $val2, $scale);
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case 'pow':
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return (string) round(pow($val1, $val2), $scale);
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case 'comp':
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$diff = round($val1 - $val2, $scale);
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return ($diff > 0) ? 1 : (($diff < 0) ? -1 : 0);
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}
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return null;
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}
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/**
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* Basic sum of an array with more precision
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*
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* @param array $array The values to sum
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* @param int $scale The scale value
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*
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* @return float
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*
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* @since 3.0.9
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*/
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public static function sum($array, $scale = 4)
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{
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// use the bcadd function if available
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if (function_exists('bcadd'))
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{
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// set the start value
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$value = 0.0;
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// loop the values and run bcadd
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foreach($array as $val)
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{
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$value = bcadd($value, (string) $val, $scale);
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}
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return $value;
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}
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// fall back on array sum
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return array_sum($array);
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}
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}
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