129 lines
3.6 KiB
PHP
129 lines
3.6 KiB
PHP
<?php
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/*
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* Number.php
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*
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* -Description-
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program 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
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*
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* @package LibreNMS
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* @link https://www.librenms.org
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* @copyright 2020 Tony Murray
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* @author Tony Murray <murraytony@gmail.com>
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*/
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namespace LibreNMS\Util;
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class Number
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{
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public static function formatBase($value, $base = 1000, $round = 2, $sf = 3, $suffix = 'B')
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{
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return $base == 1000
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? self::formatSi($value, $round, $sf, $suffix)
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: self::formatBi($value, $round, $sf, $suffix);
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}
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public static function formatSi($value, $round = 2, $sf = 3, $suffix = 'B')
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{
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$value = (float) $value;
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$neg = $value < 0;
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if ($neg) {
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$value = $value * -1;
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}
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if ($value >= '0.1') {
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$sizes = ['', 'k', 'M', 'G', 'T', 'P', 'E', 'Z', 'Y'];
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$ext = $sizes[0];
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for ($i = 1; (($i < count($sizes)) && ($value >= 1000)); $i++) {
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$value = $value / 1000;
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$ext = $sizes[$i];
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}
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} else {
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$sizes = ['', 'm', 'u', 'n', 'p'];
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$ext = $sizes[0];
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for ($i = 1; (($i < count($sizes)) && ($value != 0) && ($value <= 0.1)); $i++) {
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$value = $value * 1000;
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$ext = $sizes[$i];
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}
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}
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if ($neg) {
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$value = $value * -1;
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}
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return self::cast(number_format(round($value, $round), $sf, '.', '')) . " $ext$suffix";
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}
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public static function formatBi($value, $round = 2, $sf = 3, $suffix = 'B')
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{
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$value = (float) $value;
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$neg = $value < 0;
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if ($neg) {
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$value = $value * -1;
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}
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$sizes = ['', 'Ki', 'Mi', 'Gi', 'Ti', 'Pi', 'Ei', 'Zi', 'Yi'];
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$ext = $sizes[0];
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for ($i = 1; (($i < count($sizes)) && ($value >= 1024)); $i++) {
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$value = $value / 1024;
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$ext = $sizes[$i];
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}
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if ($neg) {
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$value = $value * -1;
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}
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return self::cast(number_format(round($value, $round), $sf, '.', '')) . " $ext$suffix";
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}
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/**
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* Cast string to int or float.
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* Returns 0 if string is not numeric
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*
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* @param string $number
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* @return float|int
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*/
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public static function cast($number)
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{
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if (! is_numeric($number)) {
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// match pre-PHP8 behavior
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if (! preg_match('/^-?\d+(\.\d+)?/', $number, $matches)) {
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return 0;
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}
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$number = $matches[0];
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}
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$float = (float) $number;
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$int = (int) $number;
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return $float == $int ? $int : $float;
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}
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/**
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* Calculate a percent, but make sure to not divide by zero. In that case, return 0.
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*
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* @param int|float $part
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* @param int|float $total
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* @param int $precision
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* @return float
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*/
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public static function calculatePercent($part, $total, int $precision = 2): float
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{
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if ($total == 0) {
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return 0;
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}
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return round($part / $total * 100, $precision);
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}
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}
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