ByteConverter.hpp

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/***************************************************
 *       _   _            _                        *
 *      | | | |          (_)                       *
 *      | |_| | ___  _ __ _ _______  _ __          *
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 *      | | | | (_) | |  | |/ / (_) | | | |        *
 *      \_| |_/\___/|_|  |_/___\___/|_| |_|        *
 ***************************************************
 * This file is part of Horizon (c).
 *
 * Copyright (c) 2019 Sagun K. (sagunxp@gmail.com).
 * Copyright (c) 2019 Horizon Dev Team.
 *
 * Base Author - Sagun K. (sagunxp@gmail.com)
 *
 * This library 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 3 of the License, or
 *  (at your option) any later version.
 * 
 * This library 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 library.  If not, see <http://www.gnu.org/licenses/>.
 **************************************************/
 
#ifndef ByteConverter_h
#define ByteConverter_h
 
#include <algorithm>
#include <cstdint>
 
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 0 // Big Endian
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 // Little Endian
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_t &) { }
inline void EndianConvert(int8_t &) { }
inline void EndianConvertReverse(uint8_t &) { }
inline void EndianConvertReverse(int8_t &) { }
 
 
#endif /* ByteConverter_h */