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25ab5df986
Ref: https://en.wikipedia.org/wiki/Kilo- For example in the Fanspeed values 4500 RPM (Rounds Per Minute) should be written as 4.5 kRPM, not 4.5 KRPM. Regards GG
112 lines
3.2 KiB
PHP
112 lines
3.2 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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