braintsck/dist/index.js

Brainfuck to JavaScript compiler in TypeScript

#!/usr/bin/env node
"use strict";
// -- START HEADER --
var __createBinding = (this && this.__createBinding) || (Object.create ? (function(o, m, k, k2) {
    if (k2 === undefined) k2 = k;
    var desc = Object.getOwnPropertyDescriptor(m, k);
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      desc = { enumerable: true, get: function() { return m[k]; } };
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    Object.defineProperty(o, k2, desc);
}) : (function(o, m, k, k2) {
    if (k2 === undefined) k2 = k;
    o[k2] = m[k];
}));
var __setModuleDefault = (this && this.__setModuleDefault) || (Object.create ? (function(o, v) {
    Object.defineProperty(o, "default", { enumerable: true, value: v });
}) : function(o, v) {
    o["default"] = v;
});
var __importStar = (this && this.__importStar) || (function () {
    var ownKeys = function(o) {
        ownKeys = Object.getOwnPropertyNames || function (o) {
            var ar = [];
            for (var k in o) if (Object.prototype.hasOwnProperty.call(o, k)) ar[ar.length] = k;
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        return ownKeys(o);
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        __setModuleDefault(result, mod);
        return result;
    };
})();
Object.defineProperty(exports, "__esModule", { value: true });
// Copyright (c) benja2998. You may redistribute under the terms of the GPL-3.0-or-later.
// brainTSck is a Brainfuck to JavaScript compiler written in TypeScript.
// -- END HEADER --
// -- START IMPORTS --
const fs = __importStar(require("fs"));
const path = __importStar(require("path"));
// -- END IMPORTS --
// Check if the provided file exists
// If it does, return the contents of the file
// If it doesn't, exit with an error
if (process.argv[2] == undefined) {
    console.log("Usage: braintsck <file>");
    process.exit(1);
}
const file = process.argv[2];
if (!fs.existsSync(file)) {
    console.log(`File ${file} does not exist`);
    process.exit(1);
}
const contents = fs.readFileSync(file, 'utf8');
let compiledContents = "";
compiledContents = `#!/usr/bin/env node

// DO NOT MODIFY.
// This is an automatically generated file by brainTSck. 
// If you want to modify it, modify ${file} and recompile by running: braintsck ${file}
const TAPE_SIZE = 30000;
const tape = new Uint8Array(TAPE_SIZE);
let pointer = 0;

`;
// Display a banner
console.log(`
  _             _    _____ ___     _   
 | |__ _ _ __ _(_)_ |_   _/ __| __| |__
 | '_ \\ '_/ _\` | | ' \\| | \\__ \\/ _| / /
 |_.__/\\_| \\__,_|_|_||_|_| |___/\\__|_\\_\\
                                       
`);
console.log(`Compiling ${file}...`);
console.time("Compilation time");
// In a loop, store each character of <contents> in a variable
for (let i = 0; i < contents.length; i++) {
    const char = contents.charAt(i);
    switch (char) {
        case '+':
            console.log("Compiling '+'");
            compiledContents += `tape[pointer]++;
            
            `;
            break;
        case '-':
            console.log("Compiling '-'");
            compiledContents += `tape[pointer]--;

            `;
            break;
        case '>':
            console.log("Compiling '>'");
            compiledContents += `pointer = (pointer + 1) % TAPE_SIZE;

            `;
            break;
        case '<':
            console.log("Compiling '<'");
            compiledContents += `pointer = (pointer - 1 + TAPE_SIZE) % TAPE_SIZE;

            `;
            break;
        case '.':
            console.log("Compiling '.'");
            compiledContents += `process.stdout.write(String.fromCharCode(tape[pointer]));

            `;
            break;
        case ',':
            console.log("Compiling ','");
            compiledContents += `{
                const buffer = Buffer.alloc(1);
                require('fs').readSync(0, buffer, 0, 1, null);
                tape[pointer] = buffer[0];
            }
            
            `;
            break;
        case '[':
            console.log("Compiling '['");
            compiledContents += `while (tape[pointer] != 0) {

            `;
            break;
        case ']':
            console.log("Compiling ']'");
            compiledContents += `}

            `;
            break;
        default:
            console.log(`Skipping ${char}`);
            break;
    }
}
console.timeEnd("Compilation time");
// Get the file name without the extension
const fileName = path.parse(file).name;
// Write the compiled contents to a file named <fileName>.js
fs.writeFileSync(`${fileName}.js`, compiledContents);
console.log(`Compiled ${file} to ${fileName}.js`);
console.log(`Run it by running: node ${fileName}.js`);