/* ISC license. */ #include #include void uint64_reverse (char *s, size_t n) { while (n--) { char c = s[0] ; s[0] = s[7] ; s[7] = c ; c = s[1] ; s[1] = s[6] ; s[6] = c ; c = s[2] ; s[2] = s[5] ; s[5] = c ; c = s[3] ; s[3] = s[4] ; s[4] = c ; s += 8 ; } }