| Leo Repp | 58b9f11 | 2021-11-22 11:57:47 +0100 | [diff] [blame^] | 1 | 'use strict'; |
| 2 | |
| 3 | var ToNumber = require('./ToNumber'); |
| 4 | var floor = require('./floor'); |
| 5 | |
| 6 | var $isNaN = require('../helpers/isNaN'); |
| 7 | |
| 8 | // https://ecma-international.org/ecma-262/6.0/#sec-touint8clamp |
| 9 | |
| 10 | module.exports = function ToUint8Clamp(argument) { |
| 11 | var number = ToNumber(argument); |
| 12 | if ($isNaN(number) || number <= 0) { return 0; } |
| 13 | if (number >= 0xFF) { return 0xFF; } |
| 14 | var f = floor(argument); |
| 15 | if (f + 0.5 < number) { return f + 1; } |
| 16 | if (number < f + 0.5) { return f; } |
| 17 | if (f % 2 !== 0) { return f + 1; } |
| 18 | return f; |
| 19 | }; |