brainfsck

My interpreter for Urban Müller's esoteric programming language, Brainfuck, written in Go and Python.

References

1. Wikipedia article

Usage

Go

make build && ./bf <fsck'd file>

Python

$ bf.py --help

Specifications

1. Start with thirty thousand bytes/cells initialized with values of zero.
2. Track two cursors: position and instruction.
3. Ignore everything between balanced brackets if the left bracket exists as the first character on the instruction tape.
4. Accept single-key input and output, using ASCII characters.

Commands

Instruction	Description
[	jump to position after corresponding right bracket, if zero
]	jump back to corresponding left bracket, if not zero
,	accept one input byte
.	output value at the position pointer
+	increment the value at the position pointer (255 rotates to zero)
-	decrement the value at the position pointer (0 rotates to 255)
>	increment the position pointer (rotate to 0 at tape end)
<	decrement the position pointer (rotate to 29999 at tape end)

## Tests

This repository includes test files. The following string should produce "Hello World!".

++++++++[>++++[>++>+++>+++>+<<<<-]>+>+>->>+[<]<-]>>.> ---.+++++++..+++.>>.<-.<.+++.------.--------.>>+.>++.