/* Copyright 2005 Daniel Cer (daniel.cer@cs.colorado.edu)

This work is licensed under the Creative Commons Attribution-NonCommercial-
ShareAlike License. To view a copy of this license, visit 
http://creativecommons.org/licenses/by-nc-sa/2.5/ or send a letter to 
Creative Commons, 543 Howard Street, 5th Floor, San Francisco, California, 
94105, USA.
*/

#include <stdio.h>
#include <stdlib.h>

/* n_i=65539*n_(i-1) mod 2**31 */
int randu() { static int n=1; return n=((n<<16)+(n<<1)+n)&0x7FFFFFFF; }

int main(int argc, char *argv[]) { int max_iter, r, i; char *parse_stop;
  if (argc != 2) { fprintf(stderr, 
      "Usage:\n\t%s (number of random values to generate*)\n"
      "\n* '0' --> unlimited\n", argv[0]); return EXIT_FAILURE; } 
  
  max_iter = strtol(argv[1], &parse_stop, 10);

  if (*parse_stop != '\0') { fprintf(stderr, 
    "Error: parameter must be an integer value\n"); return EXIT_FAILURE; }
  else if (max_iter < 0) { fprintf(stderr, 
    "Error: parameter must be non-negative\n"); return EXIT_FAILURE; }

  for (i = 0; i < max_iter || !max_iter; i++) printf("%d\n", randu());

  return EXIT_SUCCESS;
}