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// Based on:
// http://norbertlindenberg.com/2012/05/ecmascript-supplementary-characters/
// and:
// https://github.com/mathiasbynens/String.fromCodePoint/blob/master
// /fromcodepoint.js

"use strict";

var floor = Math.floor, fromCharCode = String.fromCharCode;

// eslint-disable-next-line no-unused-vars
module.exports = function (codePoint1 /*, …codePoints*/) {
	var chars = [], length = arguments.length, i, codePoint, result = "";
	for (i = 0; i < length; ++i) {
		codePoint = Number(arguments[i]);
		if (
			!isFinite(codePoint) ||
			codePoint < 0 ||
			codePoint > 0x10ffff ||
			floor(codePoint) !== codePoint
		) {
			throw new RangeError("Invalid code point " + codePoint);
		}

if (codePoint < 0x10000) {
			chars.push(codePoint);
		} else {
			codePoint -= 0x10000;
			// eslint-disable-next-line no-bitwise
			chars.push((codePoint >> 10) + 0xd800, (codePoint % 0x400) + 0xdc00);
		}
		if (i + 1 !== length && chars.length <= 0x4000) continue;
		result += fromCharCode.apply(null, chars);
		chars.length = 0;
	}
	return result;
};