source/base/base_rand.cpp


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#define RAND_CONSTANT 6364136223846793005
internal u64 rand_u64(u64 constant);

internal u64 rand_u64(u64 constant)
{
    time_t current_time = time(0);
    constant            = current_time ^ constant;

    constant += 0x9e3779b97f4a7c15;

    u64 z = constant;
    z     = (z ^ (z >> 30)) * 0xbf58476d1ce4e5b9;
    z     = (z ^ (z >> 27)) * 0x94d049bb133111eb;
    z     = z ^ (z >> 31);

    return z;
}

// TODO: bah i don't know if this is good