toaruos/libc/stdlib/rand.c

21 lines
352 B
C
Raw Normal View History

2018-05-09 13:43:02 +03:00
#include <stdint.h>
#include <stdlib.h>
#include <math.h>
static uint32_t x = 123456789;
static uint32_t y = 362436069;
static uint32_t z = 521288629;
static uint32_t w = 88675123;
int rand(void) {
uint32_t t;
t = x ^ (x << 11);
x = y; y = z; z = w;
return abs(w = w ^ (w >> 19) ^ t ^ (t >> 8));
}
void srand(unsigned int seed) {
w ^= seed;
}