ToInt32.jsā¢693 B
'use strict';
var modulo = require('./modulo');
var ToNumber = require('./ToNumber');
var truncate = require('./truncate');
var isFinite = require('math-intrinsics/isFinite');
// https://262.ecma-international.org/14.0/#sec-toint32
var two31 = 0x80000000; // Math.pow(2, 31);
var two32 = 0x100000000; // Math.pow(2, 32);
module.exports = function ToInt32(argument) {
var number = ToNumber(argument);
if (!isFinite(number) || number === 0) {
return 0;
}
var int = truncate(number);
var int32bit = modulo(int, two32);
var result = int32bit >= two31 ? int32bit - two32 : int32bit;
return result === 0 ? 0 : result; // in the spec, these are math values, so we filter out -0 here
};