exec.ha


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use io;
use os;

fn exec(bf: *Brainfuck, b: []const u8) void = {
	for (let i = 0z; i < len(b); i += 1) {
		switch (b[i]) {
		case '+' =>
			bf.mem[bf.ptr] += 1;
		case '-' =>
			bf.mem[bf.ptr] -= 1;
		case '<' =>
			if (bf.ptr > 0)
				bf.ptr -= 1
			else
				bf.ptr = mem_size - 1;
		case '>' =>
			if (bf.ptr < bf.ptr - 1)
				bf.ptr += 1
			else
				bf.ptr = 0;
		case '.' =>
			io::write(os::stdout, bf.mem[bf.ptr .. bf.ptr + 1])!;
		case ',' =>
			io::read(os::stdin, bf.mem[bf.ptr .. bf.ptr + 1])!;
		case => continue;
		};
	};
};