ft_memmove

void    *ft_memmove(void *dst, const void *src, size_t n)
{
    void    *ret;

    ret = dst;
    if (dst < src)
        ft_memcpy(dst, src, n);
    else
        while (n-- > 0)
            ((unsigned char *)dst)[n] = ((unsigned char *)src)[n];
    return (ret);
}