xref: /src/external/lgpl3/gmp/dist/tests/rand/t-urbui.c

/* Test gmp_urandomb_ui.

Copyright 2003, 2005 Free Software Foundation, Inc.

This file is part of the GNU MP Library.

The GNU MP Library is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 3 of the License, or (at your
option) any later version.

The GNU MP Library is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
License for more details.

You should have received a copy of the GNU Lesser General Public License
along with the GNU MP Library.  If not, see http://www.gnu.org/licenses/.  */

#include <stdio.h>
#include <stdlib.h>
#include "gmp.h"
#include "gmp-impl.h"
#include "tests.h"

/* Expect numbers generated by rstate to obey the number of bits requested.
   No point testing bits==BITS_PER_ULONG, since any return is acceptable in
   that case.  */
void
check_one (const char *name, gmp_randstate_ptr rstate)
{
  unsigned long  bits, limit, got;
  int    i;

  for (bits = 0; bits < BITS_PER_ULONG; bits++)
    {
      /* will demand got < limit */
      limit = (1L << bits);

      for (i = 0; i < 5; i++)
        {
          got = gmp_urandomb_ui (rstate, bits);
          if (got >= limit)
            {
              printf ("Return value out of range:\n");
              printf ("  algorithm: %s\n", name);
              printf ("  bits:  %lu\n", bits);
              printf ("  limit: %#lx\n", limit);
              printf ("  got:   %#lx\n", got);
              abort ();
            }
        }
    }
}

int
main (int argc, char *argv[])
{
  tests_start ();

  call_rand_algs (check_one);

  tests_end ();
  exit (0);
}