56 lines
1.5 KiB
JavaScript
56 lines
1.5 KiB
JavaScript
/**
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* @author sg5506844 [sg5506844@gmail.com]
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* @copyright Crown Copyright 2021
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* @license Apache-2.0
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*/
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import { base92Ord } from "../lib/Base92.mjs";
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import Operation from "../Operation.mjs";
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/**
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* From Base92 operation
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*/
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class FromBase92 extends Operation {
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/**
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* FromBase92 constructor
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*/
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constructor() {
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super();
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this.name = "From Base92";
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this.module = "Default";
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this.description = "Base92 is a notation for encoding arbitrary byte data using a restricted set of symbols that can be conveniently used by humans and processed by computers.";
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this.infoURL = "https://wikipedia.org/wiki/List_of_numeral_systems";
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this.inputType = "string";
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this.outputType = "byteArray";
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}
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/**
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* @param {string} input
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* @param {Object[]} args
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* @returns {byteArray}
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*/
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run(input, args) {
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const res = [];
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let bitString = "";
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for (let i = 0; i < input.length; i += 2) {
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if (i + 1 !== input.length) {
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const x = base92Ord(input[i]) * 91 + base92Ord(input[i + 1]);
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bitString += x.toString(2).padStart(13, "0");
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} else {
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const x = base92Ord(input[i]);
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bitString += x.toString(2).padStart(6, "0");
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}
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while (bitString.length >= 8) {
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res.push(parseInt(bitString.slice(0, 8), 2));
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bitString = bitString.slice(8);
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}
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}
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return res;
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}
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}
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export default FromBase92;
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