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// Copyright 2014-2021 Sindre Sorhus. All rights reserved. MIT license.// Copyright 2021 Yoshiya Hinosawa. All rights reserved. MIT license.// Copyright 2021 Giuseppe Eletto. All rights reserved. MIT license.// Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.// This module is browser compatible.
type LocaleOptions = {  minimumFractionDigits?: number;  maximumFractionDigits?: number;};
/** Options for {@linkcode format}. */export interface FormatOptions {  /**   * Uses bits representation.   *   * @default {false}   */  bits?: boolean;  /**   * Uses binary bytes (e.g. kibibyte).   *   * @default {false}   */  binary?: boolean;  /**   * Include plus sign for positive numbers.   *   * @default {false}   */  signed?: boolean;  /**   * Uses localized number formatting. If it is set to true, uses default   * locale on the system. If it's set to string, uses that locale. The given   * string should be a   * {@link https://en.wikipedia.org/wiki/IETF_language_tag | BCP 47 language tag}.   * You can also give the list of language tags.   */  locale?: boolean | string | string[];  /**   * The minimum number of fraction digits to display. If neither   * {@linkcode minimumFractionDigits} or {@linkcode maximumFractionDigits}   * are set, the default behavior is to round to 3 significant digits.   */  minimumFractionDigits?: number;  /**   * The maximum number of fraction digits to display. If neither   * {@linkcode minimumFractionDigits} or {@linkcode maximumFractionDigits}   * are set, the default behavior is to round to 3 significant digits.   */  maximumFractionDigits?: number;}
/** * Convert bytes to a human-readable string: 1337 → 1.34 kB * * Based on {@link https://github.com/sindresorhus/pretty-bytes | pretty-bytes}. * A utility for displaying file sizes for humans. * * This module is browser compatible. * * @example * ```ts * import { format } from "https://deno.land/std@$STD_VERSION/fmt/bytes.ts"; * * format(1337); * //=> '1.34 kB' * * format(100); * //=> '100 B' * * // Display with units of bits * format(1337, { bits: true }); * //=> '1.34 kbit' * * // Display file size differences * format(42, { signed: true }); * //=> '+42 B' * * // Localized output using German locale * format(1337, { locale: "de" }); * //=> '1,34 kB' * ``` */export function format(  num: number,  options: FormatOptions = {},): string {  if (!Number.isFinite(num)) {    throw new TypeError(`Expected a finite number, got ${typeof num}: ${num}`);  }
  const UNITS_FIRSTLETTER = (options.bits ? "b" : "B") + "kMGTPEZY";
  if (options.signed && num === 0) {    return ` 0 ${UNITS_FIRSTLETTER[0]}`;  }
  const prefix = num < 0 ? "-" : (options.signed ? "+" : "");  num = Math.abs(num);
  const localeOptions = getLocaleOptions(options);
  if (num < 1) {    const numberString = toLocaleString(num, options.locale, localeOptions);    return prefix + numberString + " " + UNITS_FIRSTLETTER[0];  }
  const exponent = Math.min(    Math.floor(      options.binary ? Math.log(num) / Math.log(1024) : Math.log10(num) / 3,    ),    UNITS_FIRSTLETTER.length - 1,  );  num /= Math.pow(options.binary ? 1024 : 1000, exponent);
  if (!localeOptions) {    num = Number(num.toPrecision(3));  }
  const numberString = toLocaleString(    num,    options.locale,    localeOptions,  );
  let unit = UNITS_FIRSTLETTER[exponent];  if (exponent > 0) {    unit += options.binary ? "i" : "";    unit += options.bits ? "bit" : "B";  }
  return prefix + numberString + " " + unit;}
function getLocaleOptions(  { maximumFractionDigits, minimumFractionDigits }: FormatOptions,): LocaleOptions | undefined {  if (maximumFractionDigits || minimumFractionDigits) {    return {      maximumFractionDigits,      minimumFractionDigits,    };  }}
/** * Formats the given number using `Number#toLocaleString`. * - If locale is a string, the value is expected to be a locale-key (for example: `de`). * - If locale is true, the system default locale is used for translation. * - If no value for locale is specified, the number is returned unmodified. */function toLocaleString(  num: number,  locale: boolean | string | string[] | undefined,  options: LocaleOptions | undefined,): string {  if (typeof locale === "string" || Array.isArray(locale)) {    return num.toLocaleString(locale, options);  } else if (locale === true || options !== undefined) {    return num.toLocaleString(undefined, options);  }
  return num.toString();}