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node_modules/es-abstract/2017/UTF16Encoding.js

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+'use strict';
+
+var GetIntrinsic = require('get-intrinsic');
+
+var $TypeError = require('es-errors/type');
+var $fromCharCode = GetIntrinsic('%String.fromCharCode%');
+
+var floor = require('./floor');
+var modulo = require('./modulo');
+
+var isCodePoint = require('../helpers/isCodePoint');
+
+// https://262.ecma-international.org/7.0/#sec-utf16encoding
+
+module.exports = function UTF16Encoding(cp) {
+	if (!isCodePoint(cp)) {
+		throw new $TypeError('Assertion failed: `cp` must be >= 0 and <= 0x10FFFF');
+	}
+	if (cp <= 65535) {
+		return $fromCharCode(cp);
+	}
+	var cu1 = floor((cp - 65536) / 1024) + 0xD800;
+	var cu2 = modulo(cp - 65536, 1024) + 0xDC00;
+	return $fromCharCode(cu1) + $fromCharCode(cu2);
+};