rand.c raw

   1  #include <stdlib.h>
   2  #include <stdint.h>
   3  
   4  static uint64_t seed;
   5  
   6  void srand(unsigned s)
   7  {
   8  	seed = s-1;
   9  }
  10  
  11  int rand(void)
  12  {
  13  	seed = 6364136223846793005ULL*seed + 1;
  14  	return seed>>33;
  15  }
  16