1/* Test mpq_cmp.
2
3Copyright 1996, 2001 Free Software Foundation, Inc.
4
5This file is part of the GNU MP Library.
6
7The GNU MP Library is free software; you can redistribute it and/or modify
8it under the terms of the GNU Lesser General Public License as published by
9the Free Software Foundation; either version 3 of the License, or (at your
10option) any later version.
11
12The GNU MP Library is distributed in the hope that it will be useful, but
13WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
14or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
15License for more details.
16
17You should have received a copy of the GNU Lesser General Public License
18along with the GNU MP Library.  If not, see http://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 NUM(x) (&((x)->_mp_num))
28#define DEN(x) (&((x)->_mp_den))
29
30#define SGN(x) ((x) < 0 ? -1 : (x) > 0 ? 1 : 0)
31
32int
33ref_mpq_cmp (mpq_t a, mpq_t b)
34{
35  mpz_t ai, bi;
36  int cc;
37
38  mpz_init (ai);
39  mpz_init (bi);
40
41  mpz_mul (ai, NUM (a), DEN (b));
42  mpz_mul (bi, NUM (b), DEN (a));
43  cc = mpz_cmp (ai, bi);
44  mpz_clear (ai);
45  mpz_clear (bi);
46  return cc;
47}
48
49#ifndef SIZE
50#define SIZE 8	/* increasing this lowers the probabilty of finding an error */
51#endif
52
53int
54main (int argc, char **argv)
55{
56  mpq_t a, b;
57  mp_size_t size;
58  int reps = 10000;
59  int i;
60  int cc, ccref;
61
62  tests_start ();
63
64  if (argc == 2)
65     reps = atoi (argv[1]);
66
67  mpq_init (a);
68  mpq_init (b);
69
70  for (i = 0; i < reps; i++)
71    {
72      size = urandom () % SIZE - SIZE/2;
73      mpz_random2 (NUM (a), size);
74      do
75	{
76	  size = urandom () % SIZE - SIZE/2;
77	  mpz_random2 (DEN (a), size);
78	}
79      while (mpz_cmp_ui (DEN (a), 0) == 0);
80
81      size = urandom () % SIZE - SIZE/2;
82      mpz_random2 (NUM (b), size);
83      do
84	{
85	  size = urandom () % SIZE - SIZE/2;
86	  mpz_random2 (DEN (b), size);
87	}
88      while (mpz_cmp_ui (DEN (b), 0) == 0);
89
90      mpq_canonicalize (a);
91      mpq_canonicalize (b);
92
93      ccref = ref_mpq_cmp (a, b);
94      cc = mpq_cmp (a, b);
95
96      if (SGN (ccref) != SGN (cc))
97	abort ();
98    }
99
100  mpq_clear (a);
101  mpq_clear (b);
102
103  tests_end ();
104  exit (0);
105}
106