libhv/hendian.h

#ifndef H_ENDIAN_H
#define H_ENDIAN_H

#include "hdef.h"

#define LITTLE_ENDIAN   0
#define BIG_ENDIAN      1
#define NET_ENDIAN      BIG_ENDIAN

int check_endian(){
    union{
        char c;
        short s;
    }u;
    u.s = 0x1122;
    if (u.c == 0x11){
        return BIG_ENDIAN;
    }
    return LITTLE_ENDIAN;
}

template <typename T>
uint8* serialize(uint8* buf, T value, int host_endian = LITTLE_ENDIAN, int buf_endian = BIG_ENDIAN){
    size_t size = sizeof(T);
    uint8* pDst = buf;
    uint8* pSrc = (uint8*)&value;

    if (host_endian == buf_endian){
        memcpy(pDst, pSrc, size);
    }else{
        for (int i = 0; i < size; ++i){
            pDst[i] = pSrc[size-i-1];
        }
    }

    return buf+size;
}

template <typename T>
uint8* deserialize(uint8* buf, T* value, int host_endian = LITTLE_ENDIAN, int buf_endian = BIG_ENDIAN){
    size_t size = sizeof(T);
    uint8* pSrc = buf;
    uint8* pDst = (uint8*)value;

    if (host_endian == buf_endian){
        memcpy(pDst, pSrc, size);
    }else{
        for (int i = 0; i < size; ++i){
            pDst[i] = pSrc[size-i-1];
        }
    }

    return buf+size;
}

#endif // H_ENDIAN_H