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prettier

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nora 2021-04-19 20:46:37 +02:00
parent 1cad1f2cc7
commit 2d731b2116
1 changed files with 5 additions and 20 deletions
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25
bfi-rust/src/main.rs
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@ -19,12 +19,11 @@ fn run(path: String) {
println!("Path: {}", path); println!("Path: {}", path);
let program = fs::read_to_string(path).unwrap(); let program = fs::read_to_string(path).unwrap();
let program = minify(program); let program = minify(program);
println!("Minified program: {}", program);
let start = SystemTime::now(); let start = SystemTime::now();
let out = interpret(program.chars().collect(), false); let out = interpret(program.chars().collect());
println!("Finished in {}ms: {}", start.elapsed().unwrap().as_millis(), out); println!("{}\nFinished execution in {}ms", out, start.elapsed().unwrap().as_millis());
} }
fn minify(program: String) -> String { fn minify(program: String) -> String {
@ -34,7 +33,7 @@ fn minify(program: String) -> String {
const MEM_SIZE: usize = 0xFFFF; const MEM_SIZE: usize = 0xFFFF;
fn interpret(pgm: Vec<char>, number_debug: bool) -> String { fn interpret(pgm: Vec<char>) -> String {
let mut out = String::new(); let mut out = String::new();
let mut pointer: usize = 0; let mut pointer: usize = 0;
let mut mem: [u8; MEM_SIZE] = [0; MEM_SIZE]; let mut mem: [u8; MEM_SIZE] = [0; MEM_SIZE];
@ -48,21 +47,14 @@ fn interpret(pgm: Vec<char>, number_debug: bool) -> String {
'<' => if pointer == 0 { pointer = MEM_SIZE - 1 } 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_add(1),
'-' => mem[pointer] = mem[pointer].wrapping_sub(1), '-' => mem[pointer] = mem[pointer].wrapping_sub(1),
'.' => { '.' => out.push(mem[pointer] as u8 as char),
if number_debug {
out.push_str(&(mem[pointer].to_string() + " "))
} else {
out.push(mem[pointer] as u8 as char)
}
}
',' => { ',' => {
stdin().read(&mut in_buffer).unwrap(); stdin().read(&mut in_buffer).unwrap();
mem[pointer] = in_buffer[0] as u8; mem[pointer] = in_buffer[0] as u8;
} }
'[' => { '[' => {
//jump to corresponding ] so that it will get to the command after the ] //jump to corresponding ]
if mem[pointer] == 0 { if mem[pointer] == 0 {
println!("jumping forward at location {}", pc + 1);
let mut level = 0; let mut level = 0;
while pgm[pc] != ']' || level > -1 { while pgm[pc] != ']' || level > -1 {
pc += 1; pc += 1;
@ -76,14 +68,10 @@ fn interpret(pgm: Vec<char>, number_debug: bool) -> String {
_ => (), _ => (),
} }
} }
println!("found matching ] at location {}", pc + 1);
assert_eq!(pgm[pc], ']')
} }
} }
']' => { ']' => {
if mem[pointer] != 0 { if mem[pointer] != 0 {
println!("jumping back at location {}", pc + 1);
//jump to corresponding [ //jump to corresponding [
let mut level = 0; let mut level = 0;
while pgm[pc] != '[' || level > -1 { while pgm[pc] != '[' || level > -1 {
@ -94,9 +82,6 @@ fn interpret(pgm: Vec<char>, number_debug: bool) -> String {
_ => (), _ => (),
} }
} }
println!("found matching [ at location {}", pc + 1);
assert_eq!(pgm[pc], '[')
} }
} }
_ => (), _ => (),