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

     1  /* Test mpq_cmp_ui.
     2  
     3  Copyright 1996, 1997, 2001, 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 <stdlib.h>
    22  
    23  #include "gmp.h"
    24  #include "gmp-impl.h"
    25  #include "tests.h"
    26  
    27  #define SGN(x) ((x) < 0 ? -1 : (x) > 0 ? 1 : 0)
    28  
    29  int
    30  ref_mpq_cmp_ui (mpq_t a, unsigned long int bn, unsigned long int bd)
    31  {
    32    mpz_t ai, bi;
    33    int cc;
    34  
    35    mpz_init (ai);
    36    mpz_init (bi);
    37  
    38    mpz_mul_ui (ai, NUM (a), bd);
    39    mpz_mul_ui (bi, DEN (a), bn);
    40    cc = mpz_cmp (ai, bi);
    41    mpz_clear (ai);
    42    mpz_clear (bi);
    43    return cc;
    44  }
    45  
    46  #ifndef SIZE
    47  #define SIZE 8	/* increasing this lowers the probability of finding an error */
    48  #endif
    49  
    50  int
    51  main (int argc, char **argv)
    52  {
    53    mpq_t a, b;
    54    mp_size_t size;
    55    int reps = 10000;
    56    int i;
    57    int cc, ccref;
    58    unsigned long int bn, bd;
    59  
    60    tests_start ();
    61  
    62    if (argc == 2)
    63       reps = atoi (argv[1]);
    64  
    65    mpq_init (a);
    66    mpq_init (b);
    67  
    68    for (i = 0; i < reps; i++)
    69      {
    70        size = urandom () % SIZE - SIZE/2;
    71        mpz_random2 (NUM (a), size);
    72        do
    73  	{
    74  	  size = urandom () % SIZE - SIZE/2;
    75  	  mpz_random2 (DEN (a), size);
    76  	}
    77        while (mpz_cmp_ui (DEN (a), 0) == 0);
    78  
    79        mpz_random2 (NUM (b), (mp_size_t) 1);
    80        mpz_mod_ui (NUM (b), NUM (b), ~(unsigned long int) 0);
    81        mpz_add_ui (NUM (b), NUM (b), 1);
    82  
    83        mpz_random2 (DEN (b), (mp_size_t) 1);
    84        mpz_mod_ui (DEN (b), DEN (b), ~(unsigned long int) 0);
    85        mpz_add_ui (DEN (b), DEN (b), 1);
    86  
    87        mpq_canonicalize (a);
    88        mpq_canonicalize (b);
    89  
    90        ccref = ref_mpq_cmp_ui (a, 1, 1);
    91        cc = mpq_cmp_ui (a, 1, 1);
    92  
    93        if (SGN (ccref) != SGN (cc))
    94  	abort ();
    95  
    96        ccref = ref_mpq_cmp_ui (a, 0, 1);
    97        cc = mpq_cmp_ui (a, 0, 1);
    98  
    99        if (SGN (ccref) != SGN (cc))
   100  	abort ();
   101  
   102        bn = mpz_get_ui (NUM (b));
   103        bd = mpz_get_ui (DEN (b));
   104  
   105        ccref = ref_mpq_cmp_ui (a, bn, bd);
   106        cc = mpq_cmp_ui (a, bn, bd);
   107  
   108        if (SGN (ccref) != SGN (cc))
   109  	abort ();
   110      }
   111  
   112    mpq_clear (a);
   113    mpq_clear (b);
   114  
   115    tests_end ();
   116    exit (0);
   117  }