A somewhat better random generator

rand() sucks, and dealing with its wonky srand() is a drag. I wrote a simple ranged random number generator, it is part of my C math library header “Emaths”, it uses Xorshift shift-register method, here's the code:

struct RandState{
    uint64_t seed;
    bool initialized = false;
};
RandState RANDSTATE;
 
uint64_t rand_XOR(){
    if (!RANDSTATE.initialized){
        RANDSTATE.seed = time(NULL);
        RANDSTATE.initialized = true;
    }
    uint64_t x = RANDSTATE.seed;
    x ^= x << 9;
    x ^= x >> 5;
    x ^= x << 15;
    return RANDSTATE.seed = x;
}
int rand_range(int min, int max){
    return min + rand_XOR() % (max - min + 1);
}