github.com/aergoio/aergo@v1.3.1/libtool/src/gmp-6.1.2/tests/rand/t-mt.c (about)

     1  /* Test the Mersenne Twister random number generator.
     2  
     3  Copyright 2002 Free Software Foundation, Inc.
     4  
     5  This file is part of the GNU MP Library test suite.
     6  
     7  The GNU MP Library test suite is free software; you can redistribute it
     8  and/or modify it under the terms of the GNU General Public License as
     9  published by the Free Software Foundation; either version 3 of the License,
    10  or (at your option) any later version.
    11  
    12  The GNU MP Library test suite is distributed in the hope that it will be
    13  useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
    14  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General
    15  Public License for more details.
    16  
    17  You should have received a copy of the GNU General Public License along with
    18  the GNU MP Library test suite.  If not, see https://www.gnu.org/licenses/.  */
    19  
    20  #include <stdio.h>
    21  #include "gmp.h"
    22  #include "gmp-impl.h"
    23  #include "tests.h"
    24  
    25  #ifndef TRUE
    26  #define TRUE (1)
    27  #endif
    28  #ifndef FALSE
    29  #define FALSE (0)
    30  #endif
    31  
    32  /* Test that the sequence without seeding equals the sequence with the
    33     default seed.  */
    34  int
    35  chk_default_seed (void)
    36  {
    37    gmp_randstate_t r1, r2;
    38    mpz_t a, b;
    39    int i;
    40    int ok = TRUE;
    41  
    42    mpz_init2 (a, 19936L);
    43    mpz_init2 (b, 19936L);
    44  
    45    gmp_randinit_mt (r1);
    46    gmp_randinit_mt (r2);
    47    gmp_randseed_ui (r2, 5489L); /* Must match DEFAULT_SEED in randmt.c */
    48    for (i = 0; i < 3; i++)
    49      {
    50        /* Extract one whole buffer per iteration.  */
    51        mpz_urandomb (a, r1, 19936L);
    52        mpz_urandomb (b, r2, 19936L);
    53        if (mpz_cmp (a, b) != 0)
    54  	{
    55  	  ok = FALSE;
    56  	  printf ("Default seed fails in iteration %d\n", i);
    57  	  break;
    58  	}
    59      }
    60    gmp_randclear (r1);
    61    gmp_randclear (r2);
    62  
    63    mpz_clear (a);
    64    mpz_clear (b);
    65    return ok;
    66  }
    67  
    68  int
    69  main (int argc, char *argv[])
    70  {
    71    int ok;
    72  
    73    tests_start ();
    74  
    75    ok = chk_default_seed ();
    76  
    77    tests_end ();
    78  
    79    if (ok)
    80      return 0; /* pass */
    81    else
    82      return 1; /* fail */
    83  }