| Tim van der Lippe | fdbd42e | 2020-04-07 14:14:36 | [diff] [blame] | 1 | 'use strict'; |
| 2 | |
| Tim van der Lippe | fdbd42e | 2020-04-07 14:14:36 | [diff] [blame] | 3 | var ToNumber = require('./ToNumber'); |
| 4 | |
| 5 | var $isNaN = require('../helpers/isNaN'); |
| 6 | var $isFinite = require('../helpers/isFinite'); |
| 7 | var $sign = require('../helpers/sign'); |
| Tim van der Lippe | fdbd42e | 2020-04-07 14:14:36 | [diff] [blame] | 8 | |
| Tim van der Lippe | 2c89197 | 2021-07-29 15:22:50 | [diff] [blame^] | 9 | var abs = require('./abs'); |
| 10 | var floor = require('./floor'); |
| 11 | var modulo = require('./modulo'); |
| 12 | |
| 13 | // https://ecma-international.org/ecma-262/6.0/#sec-touint8 |
| Tim van der Lippe | fdbd42e | 2020-04-07 14:14:36 | [diff] [blame] | 14 | |
| 15 | module.exports = function ToUint8(argument) { |
| 16 | var number = ToNumber(argument); |
| 17 | if ($isNaN(number) || number === 0 || !$isFinite(number)) { return 0; } |
| Tim van der Lippe | 2c89197 | 2021-07-29 15:22:50 | [diff] [blame^] | 18 | var posInt = $sign(number) * floor(abs(number)); |
| 19 | return modulo(posInt, 0x100); |
| Tim van der Lippe | fdbd42e | 2020-04-07 14:14:36 | [diff] [blame] | 20 | }; |
