112 lines
2.4 KiB
JavaScript
112 lines
2.4 KiB
JavaScript
function bytesToInt(bytes, numberOfBytes) {
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let buffer = [];
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if (Array.isArray(bytes)) {
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buffer = bytes.slice(0);
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if (numberOfBytes != undefined) {
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buffer = bytes.slice(bytes.length - numberOfBytes);
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}
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}
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else buffer.push(bytes);
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let result = 0;
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for (let i = 0; i < buffer.length; i++) {
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result = (result << 8) | buffer[i];
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}
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return result >>> 0; //ensure it's an unsigned 32-bit number
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}
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function resizeArray(arr, newSize, defaultValue) {
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while (newSize > arr.length)
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arr.push(defaultValue);
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arr.length = newSize;
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}
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longToByteArray = function(/*long*/long) {
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// we want to represent the input as a 8-bytes array
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var byteArray = [0, 0, 0, 0, 0, 0, 0, 0];
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for (var index = 0; index < byteArray.length; index++) {
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var byte = long & 0xff;
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byteArray[index] = byte;
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long = (long - byte) / 256;
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}
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return byteArray;
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};
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function addDays(date, days) {
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var result = new Date(date);
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result.setDate(result.getDate() + days);
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return result;
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}
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/*
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sleep(2000).then(() => {
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// Do something after the sleep!
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});
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*/
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function sleep(time) {
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return new Promise((resolve) => setTimeout(resolve, time));
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}
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function isEmptyObject(obj) {
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for (var name in obj) {
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return false;
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}
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return true;
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}
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function convertUTCDateToLocalDate(date) {
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var newDate = new Date(date);
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newDate.setMinutes(date.getMinutes() + date.getTimezoneOffset());
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return newDate;
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}
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function addZeroBefore(n) {
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return (n < 10 ? '0' : '') + n;
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}
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var convertBase = function() {
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function convertBase(baseFrom, baseTo) {
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return function(num) {
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return parseInt(num, baseFrom).toString(baseTo);
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};
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}
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// binary to decimal
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convertBase.bin2dec = convertBase(2, 10);
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// binary to hexadecimal
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convertBase.bin2hex = convertBase(2, 16);
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// decimal to binary
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convertBase.dec2bin = convertBase(10, 2);
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// decimal to hexadecimal
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convertBase.dec2hex = convertBase(10, 16);
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// hexadecimal to binary
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convertBase.hex2bin = convertBase(16, 2);
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// hexadecimal to decimal
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convertBase.hex2dec = convertBase(16, 10);
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return convertBase;
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}();
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module.exports = {
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bytesToInt,
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longToByteArray,
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addDays,
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addZeroBefore,
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resizeArray,
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isEmptyObject,
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sleep,
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convertUTCDateToLocalDate
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}
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