carloslunamota / bignumfuck

A simplified dialect of brainfuck implemented in Python 2/3

BigNumFuck

BigNumFuck is a dialect of the brainfuck programming language⁽¹⁾ that uses the same 8 simple commands (+-<>[],.) but works with numbers instead of ASCII characters. This simplifies the input/output of many programs without changing the basic language idioms that characterize brainfuck.

I provide an unoptimized interpreter of BigNumFuck implemented as a lazy generator function writen in Python 2/3 compatible code. It is able to deal with non-negative integers of arbitrary size and it will dinamically adapt the length of the tape as soon as the right end is reached.

Implementation Details:

Syntax: BigNumFuck(PROGRAM, INPUT, DEBUG = False)

• The PROGRAM is parsed in advance to remove all non valid tokens and to check for matching brackets integrity.
• The INPUT and the OUTPUT are formated as a stream of non-negative integers that are lazily consumed/produced using the Python's iterator protocol. Reading from an exhausted INPUT buffer does nothing in the current cell.
• Each cell is initialized with a '0' and may contain any positive integer (of arbitrary size). A '-' does nothing in a cell already containing a '0'.
• The TAPE grows dinamically each time a '>' reaches the right end. A '<' does nothing if the TAPE_PTR is in the origin (TAPE[0]).
• Set DEBUG = True to get a really verbose output.

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⁽¹⁾ https://en.wikipedia.org/wiki/Brainfuck