/*
 * Copyright (C) 2014 Jared Boone, ShareBrained Technology, Inc.
 *
 * This file is part of PortaPack.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2, or (at your option)
 * any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; see the file COPYING.  If not, write to
 * the Free Software Foundation, Inc., 51 Franklin Street,
 * Boston, MA 02110-1301, USA.
 */

#ifndef __DIRTY_REGISTERS_H__
#define __DIRTY_REGISTERS_H__

#include <cstddef>
#include <bitset>

#include "utility.hpp"

template <typename RegisterType, size_t RegisterCount>
class DirtyRegisters {
   public:
    using mask_t = std::bitset<RegisterCount>;

    /* TODO: I feel like I might regret implementing this cast operator... */
    operator bool() const {
        return mask.any();
    }

    void set() {
        mask.set();
    }

    void clear() {
        mask.reset();
    }

    void clear(const size_t reg_num) {
        mask.reset(reg_num);
    }

    typename mask_t::reference operator[](const size_t reg_num) {
        return mask[reg_num];
    }

    typename mask_t::reference operator[](const RegisterType reg) {
        return mask[toUType(reg)];
    }

   private:
    mask_t mask{};
};

#endif /*__DIRTY_REGISTERS_H__*/