104 lines
2.8 KiB
JavaScript
104 lines
2.8 KiB
JavaScript
'use strict';
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Object.defineProperty(exports, "__esModule", { value: true });
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exports.formatBytes = void 0;
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const BYTE_UNITS = ['B', 'kB', 'MB', 'GB', 'TB', 'PB', 'EB', 'ZB', 'YB'];
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const BIBYTE_UNITS = [
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'B',
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'kiB',
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'MiB',
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'GiB',
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'TiB',
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'PiB',
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'EiB',
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'ZiB',
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'YiB',
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];
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const BIT_UNITS = [
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'b',
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'kbit',
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'Mbit',
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'Gbit',
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'Tbit',
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'Pbit',
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'Ebit',
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'Zbit',
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'Ybit',
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];
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const BIBIT_UNITS = [
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'b',
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'kibit',
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'Mibit',
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'Gibit',
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'Tibit',
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'Pibit',
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'Eibit',
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'Zibit',
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'Yibit',
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];
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/*
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Formats the given number using `Number#toLocaleString`.
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- If locale is a string, the value is expected to be a locale-key (for example: `de`).
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- If locale is true, the system default locale is used for translation.
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- If no value for locale is specified, the number is returned unmodified.
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*/
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const toLocaleString = (number, locale, options) => {
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if (typeof locale === 'string' || Array.isArray(locale)) {
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return number.toLocaleString(locale, options);
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}
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if (locale === true || options !== undefined) {
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return number.toLocaleString(undefined, options);
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}
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return String(number);
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};
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const formatBytes = (number, options = {
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locale: 'en-US',
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signed: false,
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maximumFractionDigits: 1,
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}) => {
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if (!Number.isFinite(number)) {
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throw new TypeError(`Expected a finite number, got ${typeof number}: ${number}`);
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}
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options = { bits: false, binary: false, ...options };
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const UNITS = options.bits
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? options.binary
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? BIBIT_UNITS
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: BIT_UNITS
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: options.binary
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? BIBYTE_UNITS
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: BYTE_UNITS;
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if (options.signed && number === 0) {
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return `0 $ {
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UNITS[0]
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}`;
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}
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const isNegative = number < 0;
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const prefix = isNegative ? '-' : options.signed ? '+' : '';
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if (isNegative) {
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number = -number;
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}
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let localeOptions;
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if (options.minimumFractionDigits !== undefined) {
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localeOptions = {
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minimumFractionDigits: options.minimumFractionDigits,
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};
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}
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if (options.maximumFractionDigits !== undefined) {
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localeOptions = {
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maximumFractionDigits: options.maximumFractionDigits,
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...localeOptions,
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};
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}
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if (number < 1) {
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const numString = toLocaleString(number, options.locale, localeOptions);
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return prefix + numString + ' ' + UNITS[0];
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}
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const exponent = Math.min(Math.floor(options.binary
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? Math.log(number) / Math.log(1024)
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: Math.log10(number) / 3), UNITS.length - 1);
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number /= (options.binary ? 1024 : 1000) ** exponent;
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const numberString = toLocaleString(Number(number), options.locale, localeOptions);
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const unit = UNITS[exponent];
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return prefix + numberString + ' ' + unit;
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};
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exports.formatBytes = formatBytes;
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