cezarguimaraes / bfhs

Brainfuck haskell interpreter

bfhs

Yet another Brainf*ck interpreter in Haskell.

Installation

git clone [email protected]:cezarguimaraes/bfhs.git
cd bfhs
cabal install

Interpreter details

• Ignores any invalid characters as comments.
• Max value is by default 255 and values wrap back to 0. Disable wrapping --no-value-wrap or change its maximum to x-1 with -mx (i.e, wrapping is done modulo x).
• Maximum 30000 cells on the "tape" by default and wraps by default. Wrapping can be disabled and size of the tape can also be changed via options. Similar to cells. Check usage below.
• State of a program after execution can be dumped with -d.

Usage

bfhs
Usage: bfhs [opts] file
  -b                          TODO: Program file contains its input before a ! character.
  -c[30000]                   Number of cells available to the program. Ignored when --no-cell-wrap is set.
             --no-cell-wrap   Disables cell wrapping. Virtually infinite memory.
  -m[256]                     Maximum value of a cell. Ignored when --no-value-wrap is set.
             --no-value-wrap  Disables value wrapping, i.e allows negative values on memory
  -h         --help           Shows this message
  -d         --dump-state     Dump interpreter state at the end of execution

Examples

• Fibonacci

  $ bfhs examples/fib.bf
  1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89

• Hello, World!

  $ bfhs examples/hello_world.bf
  Hello World!

• cat

  $ echo "ping" | bfhs examples/cat.bf
  ping