mirror of https://github.com/gchq/CyberChef.git
77 lines
1.6 KiB
JavaScript
77 lines
1.6 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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/**
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* Bit shift left operation
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*/
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class BitShiftLeft extends Operation {
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/**
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* BitShiftLeft constructor
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*/
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constructor() {
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super();
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this.name = "Bit shift left";
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this.module = "Default";
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this.description = "Shifts the bits in each byte towards the left by the specified amount.";
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this.infoURL = "https://wikipedia.org/wiki/Bitwise_operation#Bit_shifts";
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this.inputType = "byteArray";
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this.outputType = "byteArray";
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this.args = [
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{
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"name": "Amount",
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"type": "number",
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"value": 1
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}
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];
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}
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/**
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* @param {byteArray} 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 amount = args[0];
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return input.map(b => {
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return (b << amount) & 0xff;
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});
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}
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/**
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* Highlight Bit shift left
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*
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* @param {Object[]} pos
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* @param {number} pos[].start
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* @param {number} pos[].end
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* @param {Object[]} args
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* @returns {Object[]} pos
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*/
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highlight(pos, args) {
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return pos;
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}
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/**
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* Highlight Bit shift left in reverse
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*
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* @param {Object[]} pos
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* @param {number} pos[].start
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* @param {number} pos[].end
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* @param {Object[]} args
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* @returns {Object[]} pos
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*/
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highlightReverse(pos, args) {
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return pos;
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}
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}
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export default BitShiftLeft;
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