#include <algorithm> //required for std::swap#define ByteSwap5(x) ByteSwap((unsigned char *) &x,sizeof(x))void ByteSwap(unsigned char * b, int n){   register int i = 0;   register int j = n-1;   while (i<j)   {      std::swap(b, b[j]);      i++, j--;   }}

#include <stdio.h>// compile-time settings for endianessenum { 	BIG_ENDIAN		= 0,	LITTLE_ENDIAN	= 1,	HOST_ENDIANESS 	= LITTLE_ENDIAN};// this class swaps the bytes of a valuetemplate <unsigned N, unsigned I = N>struct swap_bytes{	static inline void swap(char* dst, char* src)	{		dst[N-I] = src[I-1];		swap_bytes<N, I-1>::swap(dst, src);	}};template <unsigned N>struct swap_bytes<N, 0>{	static inline void swap(char* dst, char* src)	{	}};// for little endian, define how to convert data// between network type and host typetemplate <typename T, bool IS_LITTLE_ENDIAN>struct NetworkTraits{	// convert byte order	static inline T convert(T value)	{		// swap byte values		T new_value;		swap_bytes<sizeof(T)>::swap((char*)&new_value, (char*)&value);		return new_value;	}};// for big endian define how to convert data// between network type and host typetemplate <typename T>struct NetworkTraits<T, false>{	// convert byte order	static inline T convert(T value)	{		// for big-endian this is a no-op		return value;	}};// this class encapsulates a single value// due to operator overloading, a value is converted on read/writetemplate <typename T>struct NetworkType {	T value;		NetworkType& operator= (T new_value)	{		value = NetworkTraits<T, HOST_ENDIANESS>::convert(new_value);		return *this;	}        // overload other operators ...};int main(){	printf("starting\n");	if (HOST_ENDIANESS == LITTLE_ENDIAN)	{		printf("is little endian\n");	}	NetworkType<unsigned int> i;	i = 0x01020304;	printf("%x\n", i.value);	printf("finished\n");	return 0;}