Brainfuck

Simply compiles Brainfuck code to JavaScript and interprets the Brainfuck code by evaluating the JavaScript code.

Command line interface

Syntax

1. $ brainfuck code [input]

Arguments

• code – (string) The Brainfuck code to interpret.
• input – (string, optional) Used as input to the Brainfuck program.

Example

Todo

• Make options to interpret Brainfuck code from a file on the server instead of using direct input

brainfuck.js

1. /**
2. * Javascript brainfuck interpreter, inspired
3. * by http://www.muppetlabs.com/~breadbox/bf/
4. **/
5. TinyShell.plugins.brainfuck = new Class({
6. description: "Interpret brainfuck code",
7. run : function(t, args) {
8. if (!args.length) {
9. t.print("brainfuck: usage: brainfuck code [input]");
10. t.resume();
11. return;
12. }
13. var commands = {
14. '>' : "++p;",
15. '<' : "--p;",
16. '+' : "if(++array[p]>255)array[p]=0;", // modulus
17. '-' : "if(--array[p]<0)array[p]=255;", // modulus
18. '.' : "output.push(array[p]);",
19. ',' : "array[p]=input.shift();",
20. '[' : "while(array[p]){",
21. ']' : "}"
22. }
23. var output = [];
24. var input = args.length > 1 ? args[1].split("") : [];
25. var js = "var array=[];for(var j=0;j<30000;j++){array[j]=0;};var p=0;";
26. for(var i = 0; i < args[0].length; i++) if ($defined(commands[args[0].charAt(i)])) js += commands[args[0].charAt(i)];
27. eval(js);
28. var outstr = "";
29. for(var i = 0; i < output.length; i++) outstr += String.fromCharCode(output[i]);
30. t.print(outstr);
31. t.resume();
32. }
33. });