ByteConverter.h

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/*
* This file is part of Project SkyFire https://www.projectskyfire.org.
* See LICENSE.md file for Copyright information
*/
 
#ifndef SKYFIRE_BYTECONVERTER_H
#define SKYFIRE_BYTECONVERTER_H

 
#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 SKYFIRE_ENDIAN == SKYFIRE_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