1/* Test mpq_cmp_ui.
2
3Copyright 1996, 1997, 2001, 2002 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_ui (mpq_t a, unsigned long int bn, unsigned long int bd)
34{
35  mpz_t ai, bi;
36  int cc;
37
38  mpz_init (ai);
39  mpz_init (bi);
40
41  mpz_mul_ui (ai, NUM (a), bd);
42  mpz_mul_ui (bi, DEN (a), bn);
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  unsigned long int bn, bd;
62
63  tests_start ();
64
65  if (argc == 2)
66     reps = atoi (argv[1]);
67
68  mpq_init (a);
69  mpq_init (b);
70
71  for (i = 0; i < reps; i++)
72    {
73      size = urandom () % SIZE - SIZE/2;
74      mpz_random2 (NUM (a), size);
75      do
76	{
77	  size = urandom () % SIZE - SIZE/2;
78	  mpz_random2 (DEN (a), size);
79	}
80      while (mpz_cmp_ui (DEN (a), 0) == 0);
81
82      mpz_random2 (NUM (b), (mp_size_t) 1);
83      mpz_mod_ui (NUM (b), NUM (b), ~(unsigned long int) 0);
84      mpz_add_ui (NUM (b), NUM (b), 1);
85
86      mpz_random2 (DEN (b), (mp_size_t) 1);
87      mpz_mod_ui (DEN (b), DEN (b), ~(unsigned long int) 0);
88      mpz_add_ui (DEN (b), DEN (b), 1);
89
90      mpq_canonicalize (a);
91      mpq_canonicalize (b);
92
93      bn = mpz_get_ui (NUM (b));
94      bd = mpz_get_ui (DEN (b));
95
96      ccref = ref_mpq_cmp_ui (a, bn, bd);
97      cc = mpq_cmp_ui (a, bn, bd);
98
99      if (SGN (ccref) != SGN (cc))
100	abort ();
101    }
102
103  mpq_clear (a);
104  mpq_clear (b);
105
106  tests_end ();
107  exit (0);
108}
109