main
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Last change
on this file was d565449, checked in by stefan toskovski <stefantoska84@…>, 4 weeks ago |
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Update repo after prototype presentation
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Property mode
set to
100644
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File size:
698 bytes
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| 1 | 'use strict';
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| 2 |
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| 3 | var GetIntrinsic = require('get-intrinsic');
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| 4 |
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| 5 | var $TypeError = require('es-errors/type');
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| 6 | var $fromCharCode = GetIntrinsic('%String.fromCharCode%');
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| 7 |
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| 8 | var floor = require('./floor');
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| 9 | var modulo = require('./modulo');
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| 10 |
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| 11 | var isCodePoint = require('../helpers/isCodePoint');
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| 12 |
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| 13 | // https://262.ecma-international.org/7.0/#sec-utf16encoding
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| 14 |
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| 15 | module.exports = function UTF16Encoding(cp) {
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| 16 | if (!isCodePoint(cp)) {
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| 17 | throw new $TypeError('Assertion failed: `cp` must be >= 0 and <= 0x10FFFF');
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| 18 | }
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| 19 | if (cp <= 65535) {
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| 20 | return $fromCharCode(cp);
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| 21 | }
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| 22 | var cu1 = floor((cp - 65536) / 1024) + 0xD800;
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| 23 | var cu2 = modulo(cp - 65536, 1024) + 0xDC00;
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| 24 | return $fromCharCode(cu1) + $fromCharCode(cu2);
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| 25 | };
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