/*
  Reference Code of a Random Number Generator
  LCG (Linear Congruential Generator):
  an example of 32-bit LCG modulo a power of 2 from the following site.
  https://en.wikipedia.org/wiki/Linear_congruential_generator
*/


#define SEED 19660809u

/* examples of (A, B, X): (22695477, 1, 2^32), (1664525, 1013904223, 2^32) */
#define A 22695477u
#define B 1u
#define X 4294967296u /* a divider is required for other X than a power of 2 */

static unsigned int n = SEED;

void random_generator_reference_init(unsigned int s){
  n = s;
}

unsigned int random_generator_reference(void){
  n = (n * A + B) % X;
  return n;
}