/* mesytec-mvlc - driver library for the Mesytec MVLC VME controller
 *
 * Copyright (c) 2020-2023 mesytec GmbH & Co. KG
 *
 * Author: Florian Lüke <f.lueke@mesytec.com>
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice, this
 * list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright notice,
 * this list of conditions and the following disclaimer in the documentation
 * and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
#ifndef __MESYTEC_MVLC_MVLC_IMPL_SUPPORT_H__
#define __MESYTEC_MVLC_MVLC_IMPL_SUPPORT_H__

#include <array>
#include <cstddef>
#include "util/int_types.h"

namespace mesytec
{
namespace mvlc
{

template<size_t Capacity>
struct ReadBuffer
{
    std::array<u8, Capacity> data;
    u8 *first;
    u8 *last;

    ReadBuffer() { clear(); }
    size_t size() const { return last - first; }
    size_t free() const { return Capacity - size(); }
    size_t capacity() const { return Capacity; }
    void clear() { first = last = data.data(); }
};

} // end namespace mvlc
} // end namespace mesytec

#endif /* __MESYTEC_MVLC_MVLC_IMPL_SUPPORT_H__ */
