Skip to content
Permalink
9bfb9ba527
Switch branches/tags

Name already in use

A tag already exists with the provided branch name. Many Git commands accept both tag and branch names, so creating this branch may cause unexpected behavior. Are you sure you want to create this branch?
Go to file
 
 
Cannot retrieve contributors at this time
25 lines (19 sloc) 708 Bytes
'use strict';
var GetIntrinsic = require('get-intrinsic');
var $TypeError = GetIntrinsic('%TypeError%');
var $fromCharCode = GetIntrinsic('%String.fromCharCode%');
var floor = require('./floor');
var modulo = require('./modulo');
var isCodePoint = require('../helpers/isCodePoint');
// https://262.ecma-international.org/12.0/#sec-utf16encoding
module.exports = function UTF16EncodeCodePoint(cp) {
if (!isCodePoint(cp)) {
throw new $TypeError('Assertion failed: `cp` must be >= 0 and <= 0x10FFFF');
}
if (cp <= 65535) {
return $fromCharCode(cp);
}
var cu1 = $fromCharCode(floor((cp - 65536) / 1024) + 0xD800);
var cu2 = $fromCharCode(modulo(cp - 65536, 1024) + 0xDC00);
return cu1 + cu2;
};