29 lines
1.1 KiB
JavaScript
29 lines
1.1 KiB
JavaScript
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'use strict';
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var GetIntrinsic = require('get-intrinsic');
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var $Number = GetIntrinsic('%Number%');
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var $BigInt = GetIntrinsic('%BigInt%', true);
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module.exports = function integerToNBytes(intValue, n, isLittleEndian) {
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var Z = typeof intValue === 'bigint' ? $BigInt : $Number;
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/*
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if (intValue >= 0) { // step 3.d
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// Let rawBytes be a List containing the n-byte binary encoding of intValue. If isLittleEndian is false, the bytes are ordered in big endian order. Otherwise, the bytes are ordered in little endian order.
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} else { // step 3.e
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// Let rawBytes be a List containing the n-byte binary 2's complement encoding of intValue. If isLittleEndian is false, the bytes are ordered in big endian order. Otherwise, the bytes are ordered in little endian order.
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}
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*/
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if (intValue < 0) {
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intValue >>>= 0; // eslint-disable-line no-param-reassign
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}
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var rawBytes = [];
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for (var i = 0; i < n; i++) {
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rawBytes[isLittleEndian ? i : n - 1 - i] = $Number(intValue & Z(0xFF));
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intValue >>= Z(8); // eslint-disable-line no-param-reassign
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}
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return rawBytes; // step 4
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};
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