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