mirror of https://github.com/gchq/CyberChef.git
65 lines
1.5 KiB
JavaScript
65 lines
1.5 KiB
JavaScript
/**
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* @author n1474335 [n1474335@gmail.com]
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* @copyright Crown Copyright 2016
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* @license Apache-2.0
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*/
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import Operation from "../Operation.mjs";
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import BigNumber from "bignumber.js";
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import OperationError from "../errors/OperationError.mjs";
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/**
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* From Base operation
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*/
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class FromBase extends Operation {
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/**
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* FromBase constructor
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*/
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constructor() {
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super();
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this.name = "From Base";
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this.module = "Default";
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this.description = "Converts a number to decimal from a given numerical base.";
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this.infoURL = "https://wikipedia.org/wiki/Radix";
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this.inputType = "string";
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this.outputType = "BigNumber";
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this.args = [
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{
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"name": "Radix",
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"type": "number",
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"value": 36
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}
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];
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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 {BigNumber}
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*/
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run(input, args) {
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const radix = args[0];
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if (radix < 2 || radix > 36) {
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throw new OperationError("Error: Radix argument must be between 2 and 36");
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}
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const number = input.replace(/\s/g, "").split(".");
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let result = new BigNumber(number[0], radix);
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if (number.length === 1) return result;
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// Fractional part
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for (let i = 0; i < number[1].length; i++) {
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const digit = new BigNumber(number[1][i], radix);
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result += digit.div(Math.pow(radix, i+1));
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}
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return result;
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}
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}
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export default FromBase;
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