use crate::mem::Memory;
use std::collections::HashSet;

pub struct CpuState {
    pub memory: Memory,
    pub registers: [u32; 32],
    pub f_registers: [f32; 32],
    pub pc: u32,
    pub reserved_addr: Option<usize>,
}

impl CpuState {
    pub fn new(memory: Memory) -> CpuState {
        CpuState {
            memory,
            registers: [0u32; 32],
            f_registers: [0f32; 32],
            pc: 0,
            reserved_addr: None,
        }
    }

    pub fn is_addr_reserved(&self, addr: usize) -> bool {
        if let Some(reservation) = self.reserved_addr
            && (reservation..reservation + 4).contains(&addr)
        {
            return true
        }
        false
    }

    pub fn release_reservations(&mut self, indices: &[usize]) {
        if let Some(addr) = self.reserved_addr {
            for index in indices {
                if (addr..addr + 4).contains(index) {
                    self.reserved_addr = None;
                    return;
                }
            }
        }
    }
    pub fn acquire_reservations(&mut self, addr: usize) {
        self.reserved_addr = Some(addr);
    }
}