1/* Test file for mpfr_min & mpfr_max.
2
3Copyright 2004, 2006, 2007, 2008, 2009, 2010, 2011 Free Software Foundation, Inc.
4Contributed by the Arenaire and Cacao projects, INRIA.
5
6This file is part of the GNU MPFR Library.
7
8The GNU MPFR Library is free software; you can redistribute it and/or modify
9it under the terms of the GNU Lesser General Public License as published by
10the Free Software Foundation; either version 3 of the License, or (at your
11option) any later version.
12
13The GNU MPFR Library is distributed in the hope that it will be useful, but
14WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
15or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
16License for more details.
17
18You should have received a copy of the GNU Lesser General Public License
19along with the GNU MPFR Library; see the file COPYING.LESSER.  If not, see
20http://www.gnu.org/licenses/ or write to the Free Software Foundation, Inc.,
2151 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. */
22
23#include <stdio.h>
24#include <stdlib.h>
25
26#include "mpfr-test.h"
27
28int
29main (void)
30{
31  mpfr_t x, y, z;
32
33  tests_start_mpfr ();
34
35  mpfr_init (x);
36  mpfr_init (y);
37  mpfr_init (z);
38
39  /* case x=NaN && y=NAN */
40  mpfr_set_nan (x);
41  mpfr_set_nan (y);
42  mpfr_min (z, x, y, MPFR_RNDN);
43  if (!mpfr_nan_p (z))
44    {
45      printf ("Error in mpfr_min (NaN, NaN)\n");
46      exit (1);
47    }
48  mpfr_max (z, x, y, MPFR_RNDN);
49  if (!mpfr_nan_p (z))
50    {
51      printf ("Error in mpfr_max (NaN, NaN)\n");
52      exit (1);
53    }
54  /* case x=NaN */
55  mpfr_set_nan (x);
56  mpfr_set_ui (y, 0, MPFR_RNDN);
57  mpfr_min (z, x, y, MPFR_RNDN);
58  if (mpfr_cmp_ui (z, 0))
59    {
60      printf ("Error in mpfr_min (NaN, 0)\n");
61      exit (1);
62    }
63  mpfr_min (z, y, x, MPFR_RNDN);
64  if (mpfr_cmp_ui (z, 0))
65    {
66      printf ("Error in mpfr_min (0, NaN)\n");
67      exit (1);
68    }
69  mpfr_max (z, x, y, MPFR_RNDN);
70  if (mpfr_cmp_ui (z, 0))
71    {
72      printf ("Error in mpfr_max (NaN, 0)\n");
73      exit (1);
74    }
75  mpfr_max (z, y, x, MPFR_RNDN);
76  if (mpfr_cmp_ui (z, 0))
77    {
78      printf ("Error in mpfr_max (0, NaN)\n");
79      exit (1);
80    }
81  /* Case x=0+ and x=0- */
82  mpfr_set_ui (x, 0, MPFR_RNDN);
83  mpfr_set_ui (y, 0, MPFR_RNDN); MPFR_SET_NEG(y);
84  mpfr_max (z, x, y, MPFR_RNDN);
85  if (!MPFR_IS_ZERO(z) || MPFR_IS_NEG(z))
86    {
87      printf ("Error in mpfr_max (0+, 0-)\n");
88      exit (1);
89    }
90  mpfr_min (z, x, y, MPFR_RNDN);
91  if (!MPFR_IS_ZERO(z) || MPFR_IS_POS(z))
92    {
93      printf ("Error in mpfr_min (0+, 0-)\n");
94      exit (1);
95    }
96  /* Case x=0- and y=0+ */
97  mpfr_set_ui (x, 0, MPFR_RNDN); MPFR_SET_NEG(x);
98  mpfr_set_ui (y, 0, MPFR_RNDN);
99  mpfr_max (z, x, y, MPFR_RNDN);
100  if (!MPFR_IS_ZERO(z) || MPFR_IS_NEG(z))
101    {
102      printf ("Error in mpfr_max (0+, 0-)\n");
103      exit (1);
104    }
105  mpfr_min (z, x, y, MPFR_RNDN);
106  if (!MPFR_IS_ZERO(z) || MPFR_IS_POS(z))
107    {
108      printf ("Error in mpfr_min (0+, 0-)\n");
109      exit (1);
110    }
111
112  /* case x=+Inf */
113  mpfr_set_inf (x, 1);
114  mpfr_set_si (y, -12, MPFR_RNDN);
115  mpfr_min (z, x, y, MPFR_RNDN);
116  if ( mpfr_cmp_si (z, -12) )
117    {
118      printf ("Error in mpfr_min (+Inf, -12)\n");
119      exit (1);
120    }
121  mpfr_max (z, x, y, MPFR_RNDN);
122  if ( !MPFR_IS_INF(z) || MPFR_IS_NEG(z) )
123    {
124      printf ("Error in mpfr_max (+Inf, 12)\n");
125      exit (1);
126    }
127  /* case x=-Inf */
128  mpfr_set_inf (x, -1);
129  mpfr_set_ui (y, 12, MPFR_RNDN);
130  mpfr_max (z, x, y, MPFR_RNDN);
131  if ( mpfr_cmp_ui (z, 12) )
132    {
133      printf ("Error in mpfr_max (-Inf, 12)\n");
134      exit (1);
135    }
136  mpfr_min (z, x, y, MPFR_RNDN);
137  if ( !MPFR_IS_INF(z) || MPFR_IS_POS(z) )
138    {
139      printf ("Error in mpfr_min (-Inf, 12)\n");
140      exit (1);
141    }
142
143  /* case x=17 and y=42 */
144  mpfr_set_ui (x, 17, MPFR_RNDN);
145  mpfr_set_ui (y, 42, MPFR_RNDN);
146  mpfr_max (z, x, y, MPFR_RNDN);
147  if ( mpfr_cmp_ui (z, 42) )
148    {
149      printf ("Error in mpfr_max (17, 42)\n");
150      exit (1);
151    }
152  mpfr_max (z, y, x, MPFR_RNDN);
153  if ( mpfr_cmp_ui (z, 42) )
154    {
155      printf ("Error in mpfr_max (42, 17)\n");
156      exit (1);
157    }
158  mpfr_min (z, y, x, MPFR_RNDN);
159  if ( mpfr_cmp_ui (z, 17) )
160    {
161      printf ("Error in mpfr_min (42, 17)\n");
162      exit (1);
163    }
164
165  mpfr_clear (x);
166  mpfr_clear (y);
167  mpfr_clear (z);
168
169  tests_end_mpfr ();
170  return 0;
171}
172