Noratrieb/brainfuck
1
0
Fork 0
mirror of https://github.com/Noratrieb/brainfuck.git synced 2026-01-16 06:15:02 +01:00
Code Issues Projects Releases Packages Wiki Activity Actions

module restructuring

Browse source
This commit is contained in:
nora 2021-04-25 10:09:37 +02:00
parent 6d7205bc4b
commit 42fc197341
6 changed files with 53 additions and 30 deletions
Download patch file Download diff file Expand all files Collapse all files

71
bfi-rust/src/interpreter/o0.rs
View file

@ -1,71 +0,0 @@
//!
//! The very basic interpreter without any optimizations
#![allow(dead_code)]
use crate::interpreter::{MEM_SIZE, minify};
use std::io::{stdin, Read};
pub fn run(program: &str) -> String{
let program = minify(program);
let out = interpret(program.chars().collect());
out
}
fn interpret(pgm: Vec<char>) -> String {
let mut out = String::new();
let mut pointer: usize = 0;
let mut mem: [u8; MEM_SIZE] = [0; MEM_SIZE];
let mut in_buffer = [0; 1];
let mut pc = 0;
let len = pgm.len();
while pc < len {
match pgm[pc] {
'>' => if pointer == MEM_SIZE - 1 { pointer = 0 } else { pointer += 1 },
'<' => if pointer == 0 { pointer = MEM_SIZE - 1 } else { pointer -= 1 },
'+' => mem[pointer] = mem[pointer].wrapping_add(1),
'-' => mem[pointer] = mem[pointer].wrapping_sub(1),
'.' => out.push(mem[pointer] as u8 as char),
',' => {
stdin().read(&mut in_buffer).unwrap();
mem[pointer] = in_buffer[0] as u8;
}
'[' => {
//jump to corresponding ]
if mem[pointer] == 0 {
let mut level = 0;
while pgm[pc] != ']' || level > -1 {
pc += 1;
match pgm[pc] {
'[' => {
level += 1
}
']' => {
level -= 1
}
_ => (),
}
}
}
}
']' => {
if mem[pointer] != 0 {
//jump to corresponding [
let mut level = 0;
while pgm[pc] != '[' || level > -1 {
pc -= 1;
match pgm[pc] {
'[' => level -= 1,
']' => level += 1,
_ => (),
}
}
}
}
_ => (),
}
pc += 1;
}
out
}