81 lines
1.8 KiB
JavaScript
81 lines
1.8 KiB
JavaScript
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/**
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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";
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import { rot, rotr, rotrCarry, ROTATE_AMOUNT, ROTATE_CARRY } from "../lib/Rotate";
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/**
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* Rotate right operation.
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*/
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class RotateRight extends Operation {
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/**
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* RotateRight constructor
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*/
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constructor() {
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super();
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this.name = "Rotate right";
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this.module = "Default";
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this.description = "Rotates each byte to the right by the number of bits specified, optionally carrying the excess bits over to the next byte. Currently only supports 8-bit values.";
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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: ROTATE_AMOUNT
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},
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{
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name: "Carry through",
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type: "boolean",
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value: ROTATE_CARRY
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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 {byteArray}
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*/
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run(input, args) {
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if (args[1]) {
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return rotrCarry(input, args[0]);
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} else {
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return rot(input, args[0], rotr);
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}
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}
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/**
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* Highlight rotate right
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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 rotate right 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 RotateRight;
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