27 lines
608 B
Plaintext
27 lines
608 B
Plaintext
'use strict';
|
|
|
|
var clamp = require('./clamp');
|
|
|
|
var ToNumber = require('./ToNumber');
|
|
var floor = require('./floor');
|
|
|
|
var $isNaN = require('math-intrinsics/isNaN');
|
|
|
|
// https://262.ecma-international.org/15.0/#sec-touint8clamp
|
|
|
|
module.exports = function ToUint8Clamp(argument) {
|
|
var number = ToNumber(argument); // step 1
|
|
|
|
if ($isNaN(number)) { return 0; } // step 2
|
|
|
|
var clamped = clamp(number, 0, 255); // step 4
|
|
|
|
var f = floor(clamped); // step 5
|
|
|
|
if (clamped < (f + 0.5)) { return f; } // step 6
|
|
|
|
if (clamped > (f + 0.5)) { return f + 1; } // step 7
|
|
|
|
return f % 2 === 0 ? f : f + 1; // step 8
|
|
};
|