You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
154 lines
3.4 KiB
154 lines
3.4 KiB
/**
|
|
* filesize
|
|
*
|
|
* @author Jason Mulligan <jason.mulligan@avoidwork.com>
|
|
* @copyright 2013 Jason Mulligan
|
|
* @license BSD-3 <https://raw.github.com/avoidwork/filesize.js/master/LICENSE>
|
|
* @link http://filesizejs.com
|
|
* @module filesize
|
|
* @version 1.10.0
|
|
*/
|
|
( function ( global ) {
|
|
"use strict";
|
|
|
|
var base = 10,
|
|
right = /\.(.*)/,
|
|
bit = /b$/,
|
|
bite = /^B$/,
|
|
zero = /^0$/,
|
|
options;
|
|
|
|
options = {
|
|
all : {
|
|
increments : [["B", 1], ["kb", 125], ["kB", 1000], ["Mb", 125000], ["MB", 1000000], ["Gb", 125000000], ["GB", 1000000000], ["Tb", 125000000000], ["TB", 1000000000000], ["Pb", 125000000000000], ["PB", 1000000000000000]],
|
|
nth : 11
|
|
},
|
|
bitless : {
|
|
increments : [["B", 1], ["kB", 1000], ["MB", 1000000], ["GB", 1000000000], ["TB", 1000000000000], ["PB", 1000000000000000]],
|
|
nth : 6
|
|
}
|
|
};
|
|
|
|
/**
|
|
* filesize
|
|
*
|
|
* @param {Mixed} arg String, Int or Float to transform
|
|
* @param {Mixed} pos [Optional] Position to round to, defaults to 2 if shrt is ommitted, or `true` for shrthand output
|
|
* @param {Boolean} bits [Optional] Determines if `bit` sizes are used for result calculation, default is true
|
|
* @return {String} Readable file size String
|
|
*/
|
|
function filesize ( arg) {
|
|
var result = "",
|
|
bits = true,
|
|
skip = false,
|
|
i, neg, num, pos, shrt, size, sizes, suffix, z;
|
|
|
|
// Determining arguments
|
|
if (arguments[3] !== undefined) {
|
|
pos = arguments[1];
|
|
shrt = arguments[2];
|
|
bits = arguments[3];
|
|
}
|
|
else {
|
|
typeof arguments[1] === "boolean" ? shrt = arguments[1] : pos = arguments[1];
|
|
|
|
if ( typeof arguments[2] === "boolean" ) {
|
|
bits = arguments[2];
|
|
}
|
|
}
|
|
|
|
if ( isNaN( arg ) || ( pos !== undefined && isNaN( pos ) ) ) {
|
|
throw new Error("Invalid arguments");
|
|
}
|
|
|
|
shrt = ( shrt === true );
|
|
bits = ( bits === true );
|
|
pos = shrt ? 1 : ( pos === undefined ? 2 : parseInt( pos, base ) );
|
|
num = Number( arg );
|
|
neg = ( num < 0 );
|
|
|
|
// Flipping a negative number to determine the size
|
|
if ( neg ) {
|
|
num = -num;
|
|
}
|
|
|
|
// Zero is now a special case because bytes divide by 1
|
|
if ( num === 0 ) {
|
|
if ( shrt ) {
|
|
result = "0";
|
|
}
|
|
else {
|
|
result = "0 B";
|
|
}
|
|
}
|
|
else {
|
|
if ( bits ) {
|
|
sizes = options.all.increments;
|
|
i = options.all.nth;
|
|
}
|
|
else {
|
|
sizes = options.bitless.increments;
|
|
i = options.bitless.nth;
|
|
}
|
|
|
|
while ( i-- ) {
|
|
size = sizes[i][1];
|
|
suffix = sizes[i][0];
|
|
|
|
if ( num >= size ) {
|
|
// Treating bytes as cardinal
|
|
if ( bite.test( suffix ) ) {
|
|
skip = true;
|
|
pos = 0;
|
|
}
|
|
|
|
result = ( num / size ).toFixed( pos );
|
|
|
|
if ( !skip && shrt ) {
|
|
if ( bits && bit.test( suffix ) ) {
|
|
suffix = suffix.toLowerCase();
|
|
}
|
|
|
|
suffix = suffix.charAt( 0 );
|
|
z = right.exec( result );
|
|
|
|
if ( suffix === "k" ) {
|
|
suffix = "K";
|
|
}
|
|
|
|
if ( z !== null && z[1] !== undefined && zero.test( z[1] ) ) {
|
|
result = parseInt( result, base );
|
|
}
|
|
|
|
result += suffix;
|
|
}
|
|
else if ( !shrt ) {
|
|
result += " " + suffix;
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
// Decorating a 'diff'
|
|
if ( neg ) {
|
|
result = "-" + result;
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
// CommonJS, AMD, script tag
|
|
if ( typeof exports !== "undefined" ) {
|
|
module.exports = filesize;
|
|
}
|
|
else if ( typeof define === "function" ) {
|
|
define( function () {
|
|
return filesize;
|
|
});
|
|
}
|
|
else {
|
|
global.filesize = filesize;
|
|
}
|
|
})( this );
|