/*
 * Copyright (C) 2020 BfaCore
 *
 * 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 of the License, 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. If not, see <http://www.gnu.org/licenses/>.
 */

#ifndef TRINITY_BYTECONVERTER_H
#define TRINITY_BYTECONVERTER_H

/** ByteConverter reverse your byte order.  This is use
    for cross platform where they have different endians.
 */

#include "Define.h"
#include <algorithm>

namespace ByteConverter
{
    template<size_t T>
    inline void convert(char *val)
    {
        std::swap(*val, *(val + T - 1));
        convert<T - 2>(val + 1);
    }

    template<> inline void convert<0>(char *) { }
    template<> inline void convert<1>(char *) { }           // ignore central byte

    template<typename T> inline void apply(T *val)
    {
        convert<sizeof(T)>((char *)(val));
    }
}

#if TRINITY_ENDIAN == TRINITY_BIGENDIAN
template<typename T> inline void EndianConvert(T& val) { ByteConverter::apply<T>(&val); }
template<typename T> inline void EndianConvertReverse(T&) { }
template<typename T> inline void EndianConvertPtr(void* val) { ByteConverter::apply<T>(val); }
template<typename T> inline void EndianConvertPtrReverse(void*) { }
#else
template<typename T> inline void EndianConvert(T&) { }
template<typename T> inline void EndianConvertReverse(T& val) { ByteConverter::apply<T>(&val); }
template<typename T> inline void EndianConvertPtr(void*) { }
template<typename T> inline void EndianConvertPtrReverse(void* val) { ByteConverter::apply<T>(val); }
#endif

template<typename T> void EndianConvert(T*);         // will generate link error
template<typename T> void EndianConvertReverse(T*);  // will generate link error

inline void EndianConvert(uint8&) { }
inline void EndianConvert( int8&) { }
inline void EndianConvertReverse(uint8&) { }
inline void EndianConvertReverse( int8&) { }

#endif
