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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,167 @@ | ||
| "use strict"; | ||
|
|
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| /** | ||
| * filesize | ||
| * | ||
| * @copyright 2017 Jason Mulligan <jason.mulligan@avoidwork.com> | ||
| * @license BSD-3-Clause | ||
| * @version 3.5.9 | ||
| */ | ||
| (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"] | ||
| }; | ||
|
|
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| /** | ||
| * 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; | ||
|
|
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| if (isNaN(arg)) { | ||
| throw new Error("Invalid arguments"); | ||
| } | ||
|
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| 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; | ||
|
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||
| // 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; | ||
| } | ||
| } | ||
|
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| // Exceeding supported length, time to reduce & multiply | ||
| if (e > 8) { | ||
| e = 8; | ||
| } | ||
|
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| // 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)); | ||
|
|
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| if (bits) { | ||
| val = val * 8; | ||
|
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| if (val >= ceil && e < 8) { | ||
| val = val / ceil; | ||
| e++; | ||
| } | ||
| } | ||
|
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| result[0] = Number(val.toFixed(e > 0 ? round : 0)); | ||
| result[1] = base === 10 && e === 1 ? bits ? "kb" : "kB" : symbol[standard][bits ? "bits" : "bytes"][e]; | ||
|
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| if (unix) { | ||
| result[1] = standard === "jedec" ? result[1].charAt(0) : e > 0 ? result[1].replace(/B$/, "") : result[1]; | ||
|
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||
| if (b.test(result[1])) { | ||
| result[0] = Math.floor(result[0]); | ||
| result[1] = ""; | ||
| } | ||
| } | ||
| } | ||
|
|
||
| // Decorating a 'diff' | ||
| if (neg) { | ||
| result[0] = -result[0]; | ||
| } | ||
|
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||
| // Applying custom symbol | ||
| result[1] = symbols[result[1]] || result[1]; | ||
|
|
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| // Returning Array, Object, or String (default) | ||
| if (output === "array") { | ||
| return result; | ||
| } | ||
|
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| if (output === "exponent") { | ||
| return e; | ||
| } | ||
|
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| if (output === "object") { | ||
| return { value: result[0], suffix: result[1], symbol: result[1] }; | ||
| } | ||
|
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| if (full) { | ||
| result[1] = fullforms[e] ? fullforms[e] : fullform[standard][e] + (bits ? "bit" : "byte") + (result[0] === 1 ? "" : "s"); | ||
| } | ||
|
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| return result.join(spacer); | ||
| } | ||
|
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| // Partial application for functional programming | ||
| filesize.partial = function (opt) { | ||
| return function (arg) { | ||
| return filesize(arg, opt); | ||
| }; | ||
| }; | ||
|
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| // 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); |
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