third_party/ulib/musl/src/prng/rand.c

#include <stdint.h>
#include <stdlib.h>

static uint64_t seed;

void srand(unsigned s) {
    seed = s - 1;
}

int rand(void) {
    seed = 6364136223846793005ULL * seed + 1;
    return seed >> 33;
}