126 lines
3.0 KiB
PHP
126 lines
3.0 KiB
PHP
<?php
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/*
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* Copyright (C) 2019 Alexander Marston (alexander.marston@gmail.com)
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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 <http://www.gnu.org/licenses/>.
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*/
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$logk = log(1024);
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function getScale($bytes)
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{
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global $logk;
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$ui = floor(round(log($bytes)/$logk,3));
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if ($ui < 0) { $ui = 0; }
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if ($ui > 8) { $ui = 8; }
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return $ui;
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}
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// Get the largest value in an array
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function getLargestValue($array) {
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return $max = array_reduce($array, function ($a, $b) {
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return $a > $b['total'] ? $a : $b['total'];
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});
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}
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function getBaseValue($array, $scale)
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{
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$big = pow(1024,9);
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// Find the smallest non-zero value
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$sml = array_reduce($array, function ($a, $b) {
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if ((1 <= $b['rx']) && ($b['rx'] < $b['tx'])) {
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$sm = $b['rx'];
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} else {
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$sm = $b['tx'];
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}
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if (($sm < 1) || ($a < $sm)) {
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return $a;
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} else {
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return $sm;
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}
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}, $big);
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if ($sml >= $big/2) {
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$sml = 1;
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}
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// divide by scale then round down to a power of 10
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$base = pow(10,floor(round(log10($sml/pow(1024,$scale)),3)));
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// convert back to bytes
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$baseByte = $base * pow(1024, $scale);
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// Don't make the bar invisable - must be > 5% difference
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if ($sml / $baseByte < 1.05) {
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$base = $base / 10;
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}
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return $base;
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}
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function formatSize($bytes, $vnstatJsonVersion, $decimals = 2) {
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// json version 1 = convert from KiB
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// json version 2 = convert from bytes
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if ($vnstatJsonVersion == 1) {
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$bytes *= 1024; // convert from kibibytes to bytes
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}
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return formatBytes($bytes, $decimals);
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}
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function getLargestPrefix($scale)
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{
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$suffixes = ['B', 'KB', 'MB', 'GB', 'TB', 'PB', 'EB', 'ZB', 'YB'];
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return $suffixes[$scale];
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}
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function formatBytes($bytes, $decimals = 3) {
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$scale = getScale($bytes);
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return round($bytes/pow(1024, $scale), $decimals) .' '. getLargestPrefix($scale);
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}
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function formatBytesTo($bytes, $scale, $decimals = 4) {
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if ($bytes == 0) {
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return '0';
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}
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return number_format(($bytes / pow(1024, $scale)), $decimals, ".", "");
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}
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function kibibytesToBytes($kibibytes, $vnstatJsonVersion) {
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if ($vnstatJsonVersion == 1) {
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return $kibibytes *= 1024;
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} else {
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return $kibibytes;
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}
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}
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function sortingFunction($item1, $item2) {
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if ($item1['time'] == $item2['time']) {
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return 0;
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} else {
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return $item1['time'] > $item2['time'] ? -1 : 1;
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}
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};
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?>
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