uint64_t kiss()

in src/kissrandom.h [87:103]

• 11 lines of code
• 1 McCabe index (conditional complexity)

  uint64_t kiss() {
    // Linear congruence generator
    z = 6906969069LL*z+1234567;

    // Xor shift
    y ^= (y<<13);
    y ^= (y>>17);
    y ^= (y<<43);

    // Multiply-with-carry (uint128_t t = (2^58 + 1) * x + c; c = t >> 64; x = (uint64_t) t)
    uint64_t t = (x<<58)+c;
    c = (x>>6);
    x += t;
    c += (x<t);

    return x + y + z;
  }