Fuck This compiles Brainfuck programs to Java bytecode. It emits standalone Java SE 5 class files. Fuck This is written in ANSI C (C90).

This software is released under the terms of the WTFPL. Naturally.

$ echo '++++++++[>++++[>++>+++>+++>+<<<<-]>+>+>->>+[<]<-]>>.>---.+++++++..++
+.>>.<-.<.+++.------.--------.>>+.>++.' > hello.bf
$ ./ft hello.bf Hello
$ file Hello.class
Hello.class: compiled Java class data, version 49.0 (Java 1.5)
$ java Hello
Hello World!

For detailed instructions, supply the --help option.

Brainfuck, despite its simplicity, is not a well defined language. Here is how Fuck This behaves with respect to the language's ambiguities:

• The array is 30,000 cells long and each cell is a byte.
• Incrementing a value of 255 yields 0 and decrementing a value of 0 yields 255.
• Moving the index past array boundaries is allowed, but trying to access data there will crash the program.
• The , command returns newlines exactly as they appear on the host filesystem (a 13 followed by a 10 on Windows, and just a 10 elsewhere).
• The , command returns -1 (255) when EOF is reached.

This is known as Fuck This Flavored Brainfuck.

Just run make in the root Fuck This directory to compile the executable. make clean is also supported.