| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| |
| /** |
| * @author Jorge Bay Gondra |
| */ |
| 'use strict'; |
| |
| class Bytecode { |
| /** |
| * Creates a new instance of Bytecode |
| * @param {Bytecode} [toClone] |
| */ |
| constructor(toClone) { |
| if (!toClone) { |
| this.sourceInstructions = []; |
| this.stepInstructions = []; |
| } |
| else { |
| this.sourceInstructions = [...toClone.sourceInstructions]; |
| this.stepInstructions = [...toClone.stepInstructions]; |
| } |
| } |
| |
| /** |
| * Adds a new source instructions |
| * @param {String} name |
| * @param {Array} values |
| * @returns {Bytecode} |
| */ |
| addSource(name, values) { |
| if (name === undefined) { |
| throw new Error('Name is not defined'); |
| } |
| const instruction = new Array(values.length + 1); |
| instruction[0] = name; |
| for (let i = 0; i < values.length; ++i) { |
| instruction[i + 1] = values[i]; |
| } |
| this.sourceInstructions.push(Bytecode._generateInstruction(name, values)); |
| return this; |
| } |
| |
| /** |
| * Adds a new step instructions |
| * @param {String} name |
| * @param {Array} values |
| * @returns {Bytecode} |
| */ |
| addStep(name, values) { |
| if (name === undefined) { |
| throw new Error('Name is not defined'); |
| } |
| this.stepInstructions.push(Bytecode._generateInstruction(name, values)); |
| return this; |
| } |
| |
| static _generateInstruction(name, values) { |
| const length = (values ? values.length : 0) + 1; |
| const instruction = new Array(length); |
| instruction[0] = name; |
| for (let i = 1; i < length; i++) { |
| instruction[i] = values[i - 1]; |
| } |
| return instruction; |
| } |
| |
| /** |
| * Returns the JSON representation of the source and step instructions |
| * @returns {String} |
| */ |
| toString() { |
| return JSON.stringify([this.sourceInstructions, this.stepInstructions]); |
| } |
| } |
| |
| module.exports = Bytecode; |