ref: 2e89286f4ee1ef53e3acb6e4ef4b43909e9fc9e8
dir: /lib/c/src/memmove.c/
#include <string.h>
#undef memmove
void *
memmove(void *dst, const void *src, size_t n)
{
char *d = dst, *s = (char *) src;
if (d < s) {
while (n-- > 0)
*d++ = *s++;
} else {
s += n-1, d += n-1;
while (n-- > 0)
*d-- = *s--;
}
return dst;
}