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Initial refactor for 2.0.0
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@avoidwork
avoidwork committed Oct 12, 2013
1 parent 290fa44 commit c401052
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5 changes: 4 additions & 1 deletion Gruntfile.js
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Expand Up @@ -17,7 +17,10 @@ module.exports = function(grunt) {
dist: {
src : [
"<banner>",
"src/filesize.js"
"src/intro.js",
"src/filesize.js",
"src/options.js",
"src/outro.js"
],
dest : "lib/filesize.js"
}
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229 changes: 107 additions & 122 deletions lib/filesize.js
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Expand Up @@ -6,148 +6,133 @@
* @license BSD-3 <https://raw.github.com/avoidwork/filesize.js/master/LICENSE>
* @link http://filesizejs.com
* @module filesize
* @version 1.10.0
* @version 2.0.0
*/
( 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];
}
}
"use strict";

if ( isNaN( arg ) || ( pos !== undefined && isNaN( pos ) ) ) {
throw new Error("Invalid arguments");
}
var bit = /b$/,
bite = /^B$/,
radix = 10,
right = /\.(.*)/,
zero = /^0$/,
options;

shrt = ( shrt === true );
bits = ( bits === true );
pos = shrt ? 1 : ( pos === undefined ? 2 : parseInt( pos, base ) );
num = Number( arg );
neg = ( num < 0 );
/**
* filesize
*
* @method filesize
* @param {Mixed} arg String, Int or Float to transform
* @param {Object} descriptor [Optional] Flags
* @return {String} Readable file size String
*/
function filesize ( arg, descriptor ) {
var result = "",
skip = false,
i = 6,
base, bits, pos, neg, num, size, sizes, shrt, spacer, suffix, z;

if ( isNaN( arg ) ) {
throw new Error( "Invalid arguments" );
}

// Flipping a negative number to determine the size
if ( neg ) {
num = -num;
}
descriptor = descriptor || {};
bits = ( descriptor.bits === true );
shrt = ( descriptor["short"] === true );
base = descriptor.base !== undefined ? descriptor.base : 10;
pos = descriptor.pos !== undefined ? descriptor.pos : shrt ? 0 : 2;
spacer = descriptor.spacer !== undefined ? descriptor.spacer : shrt ? "" : " ";
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";
}
// Zero is now a special case because bytes divide by 1
if ( num === 0 ) {
if ( shrt ) {
result = "0";
}
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 = "0 B";
}
}
else {
sizes = options[base][bits ? "bits" : "bytes"];

result = ( num / size ).toFixed( pos );
while ( i-- ) {
size = sizes[i][1];
suffix = sizes[i][0];

if ( !skip && shrt ) {
if ( bits && bit.test( suffix ) ) {
suffix = suffix.toLowerCase();
}
if ( num >= size ) {
// Treating bytes as cardinal
if ( bite.test( suffix ) ) {
skip = true;
pos = 0;
}

suffix = suffix.charAt( 0 );
z = right.exec( result );
result = ( num / size ).toFixed( pos );

if ( suffix === "k" ) {
suffix = "K";
}
if ( !skip && shrt ) {
if ( bits && bit.test( suffix ) ) {
suffix = suffix.toLowerCase();
}

if ( z !== null && z[1] !== undefined && zero.test( z[1] ) ) {
result = parseInt( result, base );
}
suffix = suffix.charAt( 0 );
z = right.exec( result );

result += suffix;
if ( suffix === "k" ) {
suffix = "K";
}
else if ( !shrt ) {
result += " " + suffix;

if ( z !== null && z[1] !== undefined && zero.test( z[1] ) ) {
result = parseInt( result, radix );
}
break;
}
}
}

// Decorating a 'diff'
if ( neg ) {
result = "-" + result;
result += spacer + suffix;
break;
}
}

return result;
}

// CommonJS, AMD, script tag
if ( typeof exports !== "undefined" ) {
module.exports = filesize;
}
else if ( typeof define === "function" ) {
define( function () {
return filesize;
});
// Decorating a 'diff'
if ( neg ) {
result = "-" + result;
}
else {
global.filesize = filesize;

return result;
}

/**
* Size options
*
* @type {Object}
*/
options = {
2 : {
bits : [["B", 1], ["kb", 128], ["Mb", 131072], ["Gb", 134217728], ["Tb", 137438953472], ["Pb", 140737488355328]],
bytes : [["B", 1], ["kB", 1024], ["MB", 1048576], ["GB", 1073741824], ["TB", 1099511627776], ["PB", 1125899906842624]]
},
10 : {
bits : [["B", 1], ["kb", 125], ["Mb", 125000], ["Gb", 125000000], ["Tb", 125000000000], ["Pb", 125000000000000]],
bytes : [["B", 1], ["kB", 1000], ["MB", 1000000], ["GB", 1000000000], ["TB", 1000000000000], ["PB", 1000000000000000]]
}
})( this );
};

// 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 );
4 changes: 2 additions & 2 deletions lib/filesize.map
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Expand Up @@ -2,7 +2,7 @@
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"sources":["filesize.js"],
"names":["global","filesize","arg","result","bits","skip","pos","shrt","size","sizes","undefined","isNaN","Error","parseInt","base","num","Number","neg","options","all","increments","i","nth","bitless","suffix","bite","test","toFixed","bit","toLowerCase","charAt","z","right","exec","zero","exports","module","define"]
"names":["global","filesize","arg","descriptor","result","skip","i","base","bits","pos","neg","num","size","sizes","shrt","spacer","isNaN","Error","undefined","Number","options","suffix","bite","test","toFixed","bit","toLowerCase","charAt","z","right","exec","zero","parseInt","radix","exports","module","define"]
}
8 changes: 4 additions & 4 deletions lib/filesize.min.js
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2 changes: 1 addition & 1 deletion package.json
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@@ -1,7 +1,7 @@
{
"name": "filesize",
"description": "JavaScript library to generate a human readable String describing the file size",
"version": "1.10.0",
"version": "2.0.0",
"homepage": "http://filesizejs.com",
"author": {
"name": "Jason Mulligan",
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