Byteswap

Finally, we can write a more general function that can deal with any atomic data type (e.g. int, float, double, etc) with automatic size detection:

Code:

#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[i], b[j]);
      i++, j--;
   }
}

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For example, the next code snippet shows how to convert a data array of doubles from one format (e.g. Big-Endian) to the other (e.g. Little-Endian):

Code:

double* dArray; //array in big-endian format
int n; //Number of elements

for (register int i = 0; i <n; i++) 
   ByteSwap5(dArray[i]);

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