<?php
/*
* Smarty plugin
* -------------------------------------------------------------
* Type:    modifier
* Name:    fsize_format
* Version:    0.2
* Date:    2003-05-15
* Author:    Joscha Feth, joscha@feth.com
* Purpose: formats a filesize (in bytes) to human-readable format
* Usage:    In the template, use
            {$filesize|fsize_format}    =>    123.45 B|KB|MB|GB|TB
            or
            {$filesize|fsize_format:"MB"}    =>    123.45 MB
            or
            {$filesize|fsize_format:"TB":4}    =>    0.0012 TB
* Params:
            int        size            the filesize in bytes
            string    format            the format, the output shall be: B, KB, MB, GB or TB
            int        precision        the rounding precision
            string    dec_point        the decimal separator
            string    thousands_sep    the thousands separator
* Install: Drop into the plugin directory
* Version:
*            2007-05-24    Version 0.3    - added the peta, exa, zeta, and yeta byte magnitudes thanks to coreone (at) gmail (dot) com
*            2003-05-15    Version 0.2    - added dec_point and thousands_sep thanks to Thomas Brandl, tbrandl@barff.de
*                                    - made format always uppercase
*                                    - count sizes "on-the-fly"
*            2003-02-21    Version 0.1    - initial release
* -------------------------------------------------------------
*/
function smarty_modifier_fsize_format($size, $format = '', $precision = 2, $dec_point = '.', $thousands_sep = ',')
{
    $format = strtoupper($format);
    static $sizes = [];
    if (! count($sizes)) {
        $b = 1024;
        $sizes['B'] = 1;
        $sizes['KB'] = $sizes['B'] * $b;
        $sizes['MB'] = $sizes['KB'] * $b;
        $sizes['GB'] = $sizes['MB'] * $b;
        $sizes['TB'] = $sizes['GB'] * $b;
        $sizes['PB'] = $sizes['TB'] * $b;
        $sizes['EB'] = $sizes['PB'] * $b;
        $sizes['ZB'] = $sizes['EB'] * $b;
        $sizes['YB'] = $sizes['ZB'] * $b;
        $sizes = array_reverse($sizes, true);
    }
    //~ get "human" filesize
    foreach ($sizes    as    $unit => $bytes) {
        if ($size > $bytes || $unit == $format) {
            //~ return formatted size
            return    number_format($size / $bytes, $precision, $dec_point, $thousands_sep).' '.$unit;
        } //~ end if
    } //~ end foreach
} //~ end function
