72 lines
1.9 KiB
PHP
72 lines
1.9 KiB
PHP
<?php
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namespace Icinga\Util;
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class Format
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{
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const STANDARD_IEC = 0;
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const STANDARD_SI = 1;
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protected static $instance;
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protected static $bitPrefix = array(
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array('bit', 'Kibit', 'Mibit', 'Gibit', 'Tibit', 'Pibit', 'Eibit', 'Zibit', 'Yibit'),
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array('bit', 'kbit', 'Mbit', 'Gbit', 'Tbit', 'Pbit', 'Ebit', 'Zbit', 'Ybit'),
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);
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protected static $bitBase = array(1024, 1000);
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protected static $bytePrefix = array(
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array('B', 'KiB', 'MiB', 'GiB', 'TiB', 'PiB', 'EiB', 'ZiB', 'YiB'),
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array('B', 'kB', 'MB', 'GB', 'TB', 'PB', 'EB', 'ZB', 'YB'),
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);
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protected static $byteBase = array(1024, 1000);
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public static function getInstance()
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{
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if (self::$instance === null) {
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self::$instance = new Format;
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}
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return self::$instance;
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}
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public static function bits($value, $standard = self::STANDARD_SI)
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{
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return self::formatForUnits(
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$value,
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self::$bitPrefix[$standard],
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self::$bitBase[$standard]
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);
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}
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public static function bytes($value, $standard = self::STANDARD_IEC)
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{
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return self::formatForUnits(
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$value,
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self::$bytePrefix[$standard],
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self::$byteBase[$standard]
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);
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}
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protected static function formatForUnits($value, & $units, $base)
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{
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$sign = '';
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if ($value < 0) {
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$value = abs($value);
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$sign = '-';
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}
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$pow = floor(log($value, $base));
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$result = $value / pow($base, $pow);
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// 1034.23 looks better than 1.03, but 2.03 is fine:
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if ($pow > 0 && $result < 2) {
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$pow--;
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$result = $value / pow($base, $pow);
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}
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return sprintf(
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'%s%0.2f %s',
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$sign,
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$result,
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$units[$pow]
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);
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}
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}
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