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day05.rs
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day05.rs
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use std::fs::File;
use std::io::{stdin,stdout,BufRead,Read,Write};
pub struct Komputer {
input: Vec<i32>,
cursor: usize,
}
impl Komputer {
pub fn new (input: Vec<i32>) -> Komputer {
Komputer {
input,
cursor: 0,
}
}
fn add (&mut self, modes: [i32;2]) -> usize {
let p = self.offset(3);
self.input[p] = self.param(0,&modes) + self.param(1,&modes);
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}
fn mply (&mut self, modes: [i32;2]) -> usize {
let p = self.offset(3);
self.input[p] = self.param(0,&modes)*self.param(1,&modes);
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}
fn read (&mut self) -> usize {
let mut s = String::new();
print!("Enter integer: ");
stdout().flush();
stdin().read_line(&mut s).expect("Input error");
let p = self.offset(1);
self.input[p] = s.trim().parse().expect("Not an integer");
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}
fn write (&mut self, modes: [i32;1]) -> usize {
println!("{}",self.param(0,&modes));
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}
fn jumpt (&mut self, modes: [i32;2]) -> usize {
if self.param(0,&modes) != 0 {
self.cursor = self.param(1,&modes) as usize;
0
}
else {
3
}
}
fn jumpf (&mut self, modes: [i32;2]) -> usize {
if self.param(0,&modes) == 0 {
self.cursor = self.param(1,&modes) as usize;
0
}
else {
3
}
}
fn less (&mut self, modes: [i32;2]) -> usize {
let p = self.offset(3);
self.input[p] = if self.param(0,&modes) < self.param(1,&modes) {
1
}
else {
0
};
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}
fn equal (&mut self, modes: [i32;2]) -> usize {
let p = self.offset(3);
self.input[p] = if self.param(0,&modes) == self.param(1,&modes) {
1
}
else {
0
};
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}
fn offset (&self, p: usize) -> usize {
self.input[self.cursor + p] as usize
}
fn param (&self, p: usize, modes: &[i32]) -> i32 {
if modes[p] == 0 {
self.input[self.input[self.cursor + p + 1] as usize]
}
else {
self.input[self.cursor + p + 1]
}
}
pub fn run (&mut self) -> Vec<i32> {
loop {
let mut x = self.input[self.cursor];
let m2 = x/1000;
x = x%1000;
let m1 = x/100;
x = x%100;
println!("{} {} {:02}",m2,m1,x);
self.cursor += match x {
1 => self.add([m1,m2]),
2 => self.mply([m1,m2]),
3 => self.read(),
4 => self.write([m1]),
5 => self.jumpt([m1,m2]),
6 => self.jumpf([m1,m2]),
7 => self.less([m1,m2]),
8 => self.equal([m1,m2]),
99 => break,
x => panic!("Horrible at {}: {}",self.cursor,x),
};
}
self.input.clone()
}
}
fn parse (s: &str) -> Vec<i32> {
let mut v = Vec::new();
let mut ns = None;
let mut neg = false;
for c in s.chars() {
match c as u8 {
45 => neg = true,
n @ 48..=57 => if let Some(x) = ns {
ns = Some(10*x + n as i32 - 48)
}
else {
ns = Some(n as i32 - 48)
},
_ => {
if let Some(x) = ns {
v.push(if neg {
neg = false;
-x
}
else {
x
});
}
ns = None;
},
};
}
v
}
fn main () -> std::io::Result<()> {
let mut data = String::new();
let mut file = File::open("input05")?;
file.read_to_string(&mut data)?;
println!("{:?}",Komputer::new(parse(&data)).run());
Ok(())
}