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'use strict';

var ToNumber = require('./ToNumber');

var $isNaN = require('../helpers/isNaN');
var $isFinite = require('../helpers/isFinite');
var $sign = require('../helpers/sign');

var abs = require('./abs');
var floor = require('./floor');
var modulo = require('./modulo');

// https://ecma-international.org/ecma-262/6.0/#sec-touint8

module.exports = function ToUint8(argument) {
	var number = ToNumber(argument);
	if ($isNaN(number) || number === 0 || !$isFinite(number)) { return 0; }
	var posInt = $sign(number) * floor(abs(number));
	return modulo(posInt, 0x100);
};