0jdxt / Fungey

Befunge-93/98 command-line interpreter written in Python 3

Fungey

Befunge-93/98 interpreter written in Python.

98 is only partially supported. Check instructions.py.

Instructions available: (space) (0-9) (a-f) @ # + * - / % ! ` : \ $ g p ^ v < > [ ] ? _ | . , & ~.

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Usage

cd into the root directory.

$ ./interpreter.py PROGRAM [--raw]

where PROGRAM is the path to a Befunge source file.

Output

The interpeter outputs a newline after the program output if stdout is to the terminal (sys.stdout.isatty() is True). To keep raw output in the terminal, use the --raw flag. Piping and redirecting uses the raw output automatically.

Input

Input to a Befunge program can be piped from stdin like so:

$ echo "5" | ./interpreter.py programs/factorial.b93

otherwise input will be prompted for like normal:

• => input integer (waits for line feed)
• > input character (waits for single character)

Future/TODO

• Finish implementing -98.
• Define modes to run in either -93 or -98 mode via flags
• Speed test commands/classes for optimisations