| 'use strict'; |
| |
| var GetIntrinsic = require('get-intrinsic'); |
| |
| var $Number = GetIntrinsic('%Number%'); |
| var $BigInt = GetIntrinsic('%BigInt%', true); |
| |
| module.exports = function integerToNBytes(intValue, n, isLittleEndian) { |
| var Z = typeof intValue === 'bigint' ? $BigInt : $Number; |
| /* |
| if (intValue >= 0) { // step 3.d |
| // 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. |
| } else { // step 3.e |
| // 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. |
| } |
| */ |
| if (intValue < 0) { |
| intValue >>>= 0; // eslint-disable-line no-param-reassign |
| } |
| |
| var rawBytes = []; |
| for (var i = 0; i < n; i++) { |
| rawBytes[isLittleEndian ? i : n - 1 - i] = $Number(intValue & Z(0xFF)); |
| intValue >>= Z(8); // eslint-disable-line no-param-reassign |
| } |
| |
| return rawBytes; // step 4 |
| }; |