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19 lines
522 B
19 lines
522 B
'use strict'; |
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var ToNumber = require('./ToNumber'); |
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var floor = require('./floor'); |
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var $isNaN = require('../helpers/isNaN'); |
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// https://ecma-international.org/ecma-262/6.0/#sec-touint8clamp |
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module.exports = function ToUint8Clamp(argument) { |
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var number = ToNumber(argument); |
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if ($isNaN(number) || number <= 0) { return 0; } |
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if (number >= 0xFF) { return 0xFF; } |
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var f = floor(argument); |
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if (f + 0.5 < number) { return f + 1; } |
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if (number < f + 0.5) { return f; } |
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if (f % 2 !== 0) { return f + 1; } |
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return f; |
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};
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