Constnium/node_modules/es-abstract/2022/ToBigInt64.js
2022-06-23 02:27:43 +02:00

25 lines
948 B
JavaScript

'use strict';
var GetIntrinsic = require('get-intrinsic');
var $BigInt = GetIntrinsic('%BigInt%', true);
var $pow = GetIntrinsic('%Math.pow%');
var ToBigInt = require('./ToBigInt');
var BigIntRemainder = require('./BigInt/remainder');
var modBigInt = require('../helpers/modBigInt');
// BigInt(2**63), but node v10.4-v10.8 have a bug where you can't `BigInt(x)` anything larger than MAX_SAFE_INTEGER
var twoSixtyThree = $BigInt && (BigInt($pow(2, 32)) * BigInt($pow(2, 31)));
// BigInt(2**64), but node v10.4-v10.8 have a bug where you can't `BigInt(x)` anything larger than MAX_SAFE_INTEGER
var twoSixtyFour = $BigInt && (BigInt($pow(2, 32)) * BigInt($pow(2, 32)));
// https://262.ecma-international.org/11.0/#sec-tobigint64
module.exports = function ToBigInt64(argument) {
var n = ToBigInt(argument);
var int64bit = modBigInt(BigIntRemainder, n, twoSixtyFour);
return int64bit >= twoSixtyThree ? int64bit - twoSixtyFour : int64bit;
};