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25 lines
948 B
Text
25 lines
948 B
Text
'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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