Simple and lazy Brainf*ck interpreter

Why?

Because i'm learning about compilers and interpreters

Does it work?

Yes, all you need is GCC and make ( in fact you just need gcc, but typing make is faster )

Features

• Interpret Brainfuck code from either a file or standard input
• Step-by-step execution with tape visualization
• Debug mode for enhanced troubleshooting
• Web-based interface using WebAssembly (Emscripten)

Prerequisites

• GCC
• Make
• Emscripten SDK (for WebAssembly build)

Installation

Native Build

To compile the program natively, simply run:

$ make build

WebAssembly Build

To compile the program to WebAssembly using Emscripten, run:

$ make web

Usage

Native

To interpret Brainfuck code from standard input:

$ echo " >++++++++[-<+++++++++>]<.>>+>-[+]++>++>+++[>[->+++<<+++>]<<]>-----.>->
+++..+++.>-.<<+[>[+>+]>>]<--------------.>>.+++.------.--------.>+.>+." | ./bli

To interpret Brainfuck code from a file:

$ ./bli -c your_file.bf

For step-by-step execution:

$ ./bli -s -c your_file.bf

For debug mode:

$ ./bli -d -c your_file.bf

Web-based

Open bli.html in your web browser. Paste your Brainfuck code into the textarea and click "Run".

How It Works

The interpreter starts by reading the Brainfuck code provided either as a command-line argument or from standard input. It then iterates through each character, performing actions based on the Brainfuck instruction set.

The memory is represented by a tape, a 30,000-cell array initialized with zeros. The Brainfuck code manipulates this tape to perform computations, which can then be output as ASCII characters.

Brainfuck Instruction Set

Instruction	Utility
.	Output the byte at the data pointer as an ASCII encoded character.
,	Accept one byte of input and store its value in the byte at the data pointer.
+	Increment the byte at the data pointer.
-	Decrement the byte at the data pointer.
<	Decrement the data pointer.
>	Increment the data pointer.
[	Jump past the corresponding ] if the byte at the data pointer is zero.
]	Jump back to the corresponding [ if the byte at the data pointer is nonzero.