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- 'use strict';
- var modulo = require('./modulo');
- var ToNumber = require('./ToNumber');
- var truncate = require('./truncate');
- var isFinite = require('../helpers/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
- };
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