webpack/lib/SizeFormatHelpers.js

/*
	MIT License http://www.opensource.org/licenses/mit-license.php
	Author Sean Larkin @thelarkinn
*/
"use strict";

const SizeFormatHelpers = exports;

SizeFormatHelpers.formatSize = size => {
	if (typeof size !== "number" || Number.isNaN(size) === true) {
		return "unknown size";
	}

	if (size <= 0) {
		return "0 bytes";
	}

	const abbreviations = ["bytes", "KiB", "MiB", "GiB"];
	const index = Math.floor(Math.log(size) / Math.log(1024));

	return `${+(size / Math.pow(1024, index)).toPrecision(3)} ${
		abbreviations[index]
	}`;
};