Method execute

2019/src/intcoder.rs:30–54

(&mut self)

  }

  pub fn execute(&mut self) -> ExitCode {
    loop {
      let (op,a,b,c) = self.fetch_inst();
      match op {
        ADD => self.set(c, a + b),
        MUL => self.set(c, a * b),
        SLT => self.set(c, a < b),
        SEQ => self.set(c, a == b),
        BSE => self.rel_base += a,
        JNZ => if a != 0 { self.pc = b },
        JZ  => if a == 0 { self.pc = b },
        OUT => return ExitCode::Output(a),
        HLT => return ExitCode::Halted,
        IN  => match self.input.pop_front() {
          Some(i) => {
            let a = self.fetch_write_adr(1);
            self.set(a,i);
            self.pc += 2;
          }
          None => return ExitCode::AwaitInput
        }
        _ => panic!("invalid opcode {}", op)
      }
    }
  }

  pub fn execute_until_output(&mut self) -> i64 {
    match self.execute() {