Is there a better way to reverse an array of bytes in memory?

Question

typedef unsigned char Byte;

...

void ReverseBytes( void *start, int size )
{
    Byte *buffer = (Byte *)(start);

    for( int i = 0; i < size / 2; i++ ) {
             


        

Answer 1

A performant solution without using the STL:

void reverseBytes(void *start, int size) {
    unsigned char *lo = start;
    unsigned char *hi = start + size - 1;
    unsigned char swap;
    while (lo < hi) {
        swap = *lo;
        *lo++ = *hi;
        *hi-- = swap;
    }
}

Though the question is 3 ½ years old, chances are that someone else will be searching for the same thing. That's why I still post this.