"use strict"; /** * filesize * * @copyright 2017 Jason Mulligan <jason.mulligan@avoidwork.com> * @license BSD-3-Clause * @version 3.5.11 */ (function (global) { var b = /^(b|B)$/, symbol = { iec: { bits: ["b", "Kib", "Mib", "Gib", "Tib", "Pib", "Eib", "Zib", "Yib"], bytes: ["B", "KiB", "MiB", "GiB", "TiB", "PiB", "EiB", "ZiB", "YiB"] }, jedec: { bits: ["b", "Kb", "Mb", "Gb", "Tb", "Pb", "Eb", "Zb", "Yb"], bytes: ["B", "KB", "MB", "GB", "TB", "PB", "EB", "ZB", "YB"] } }, fullform = { iec: ["", "kibi", "mebi", "gibi", "tebi", "pebi", "exbi", "zebi", "yobi"], jedec: ["", "kilo", "mega", "giga", "tera", "peta", "exa", "zetta", "yotta"] }; /** * 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) { var descriptor = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {}; var result = [], val = 0, e = void 0, base = void 0, bits = void 0, ceil = void 0, full = void 0, fullforms = void 0, neg = void 0, num = void 0, output = void 0, round = void 0, unix = void 0, spacer = void 0, standard = void 0, symbols = void 0; if (isNaN(arg)) { throw new Error("Invalid arguments"); } bits = descriptor.bits === true; unix = descriptor.unix === true; base = descriptor.base || 2; round = descriptor.round !== undefined ? descriptor.round : unix ? 1 : 2; spacer = descriptor.spacer !== undefined ? descriptor.spacer : unix ? "" : " "; symbols = descriptor.symbols || descriptor.suffixes || {}; standard = base === 2 ? descriptor.standard || "jedec" : "jedec"; output = descriptor.output || "string"; full = descriptor.fullform === true; fullforms = descriptor.fullforms instanceof Array ? descriptor.fullforms : []; e = descriptor.exponent !== undefined ? descriptor.exponent : -1; num = Number(arg); neg = num < 0; ceil = base > 2 ? 1000 : 1024; // Flipping a negative number to determine the size if (neg) { num = -num; } // Determining the exponent if (e === -1 || isNaN(e)) { e = Math.floor(Math.log(num) / Math.log(ceil)); if (e < 0) { e = 0; } } // Exceeding supported length, time to reduce & multiply if (e > 8) { e = 8; } // Zero is now a special case because bytes divide by 1 if (num === 0) { result[0] = 0; result[1] = unix ? "" : symbol[standard][bits ? "bits" : "bytes"][e]; } else { val = num / (base === 2 ? Math.pow(2, e * 10) : Math.pow(1000, e)); if (bits) { val = val * 8; if (val >= ceil && e < 8) { val = val / ceil; e++; } } result[0] = Number(val.toFixed(e > 0 ? round : 0)); result[1] = base === 10 && e === 1 ? bits ? "kb" : "kB" : symbol[standard][bits ? "bits" : "bytes"][e]; if (unix) { result[1] = standard === "jedec" ? result[1].charAt(0) : e > 0 ? result[1].replace(/B$/, "") : result[1]; if (b.test(result[1])) { result[0] = Math.floor(result[0]); result[1] = ""; } } } // Decorating a 'diff' if (neg) { result[0] = -result[0]; } // Applying custom symbol result[1] = symbols[result[1]] || result[1]; // Returning Array, Object, or String (default) if (output === "array") { return result; } if (output === "exponent") { return e; } if (output === "object") { return { value: result[0], suffix: result[1], symbol: result[1] }; } if (full) { result[1] = fullforms[e] ? fullforms[e] : fullform[standard][e] + (bits ? "bit" : "byte") + (result[0] === 1 ? "" : "s"); } return result.join(spacer); } // Partial application for functional programming filesize.partial = function (opt) { return function (arg) { return filesize(arg, opt); }; }; // CommonJS, AMD, script tag if (typeof exports !== "undefined") { module.exports = filesize; } else if (typeof define === "function" && define.amd) { define(function () { return filesize; }); } else { global.filesize = filesize; } })(typeof window !== "undefined" ? window : global);