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#![allow(dead_code)]
#![allow(unused_variables)]
#![allow(unused_mut)]
use std::env;
use std::fs::File;
use std::io::Read;
#[derive(Debug, PartialEq, Clone, Copy)]
struct State {
a: i64,
b: i64,
c: i64,
pc: usize,
}
fn opcode(mut s: State, prog: &Vec<i64>, out: &mut Vec<i64>) -> State {
let op = prog[s.pc];
let arg = prog[s.pc + 1];
let combo = match arg {
0 => 0,
1 => 1,
2 => 2,
3 => 3,
4 => s.a,
5 => s.b,
6 => s.c,
7 => panic!(),
_ => panic!(),
};
let mut jump = false;
match op {
0 => s.a = s.a / (1 << combo),
1 => s.b ^= arg,
2 => s.b = combo % 8,
3 => {
if s.a != 0 {
jump = true;
s.pc = arg as usize;
}
}
4 => s.b ^= s.c,
5 => out.push(combo % 8),
6 => s.b = s.a / (1 << combo),
7 => s.c = s.a / (1 << combo),
_ => panic!(),
}
if jump == false {
s.pc += 2;
}
return s;
}
fn main() {
let args: Vec<String> = env::args().collect();
let filename = if args.len() == 1 {
"in/".to_owned() + args[0].split('/').last().unwrap() + ".pzl"
} else {
args[1].clone()
};
let mut f = File::open(filename).expect("cannot open file");
let mut content = String::new();
f.read_to_string(&mut content).expect("cannot read file");
let lines = content.trim_end().split("\n").collect::<Vec<_>>();
let (l, r) = lines[0].split_once(": ").unwrap();
let mut a: i64 = r.parse().unwrap();
let (l, r) = lines[1].split_once(": ").unwrap();
let mut b: i64 = r.parse().unwrap();
let (l, r) = lines[2].split_once(": ").unwrap();
let mut c: i64 = r.parse().unwrap();
let (l, r) = lines[4].split_once(": ").unwrap();
let prog: Vec<i64> = r.split(",").map(|x| x.parse().unwrap()).collect();
let mut s = State {
a: a,
b: b,
c: c,
pc: 0,
};
let mut out: Vec<i64> = Vec::new();
loop {
//println!("{:?} {:?}", s, out);
if s.pc + 1 >= prog.len() {
break;
}
s = opcode(s, &prog, &mut out);
}
//println!("{:?}", out);
let res1 = out
.iter()
.map(|x| x.to_string())
.collect::<Vec<_>>()
.join(",");
let mut res2 = 0;
println!("res1: {}", res1);
println!("res2: {}", res2);
assert_eq!(res1, "6,2,7,2,3,1,6,0,5");
//assert_eq!(res2, );
}
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