1/* Test file for mpfr_cmp.
2
3Copyright 1999, 2001, 2002, 2003, 2004, 2005, 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  double x, y;
32  mpfr_t xx, yy;
33  int c;
34  long i;
35  mpfr_prec_t p;
36
37  tests_start_mpfr ();
38
39  mpfr_init (xx);
40  mpfr_init (yy);
41
42  mpfr_set_prec (xx, 2);
43  mpfr_set_prec (yy, 2);
44  mpfr_set_str_binary(xx, "-0.10E0");
45  mpfr_set_str_binary(yy, "-0.10E0");
46  if ((mpfr_cmp) (xx, yy))
47    {
48      printf ("mpfr_cmp (xx, yy) returns non-zero for prec=2\n");
49      exit (1);
50    }
51
52  mpfr_set_prec (xx, 65);
53  mpfr_set_prec (yy, 65);
54  mpfr_set_str_binary(xx, "0.10011010101000110101010000000011001001001110001011101011111011101E623");
55  mpfr_set_str_binary(yy, "0.10011010101000110101010000000011001001001110001011101011111011100E623");
56  p = 0;
57  if (mpfr_cmp2 (xx, yy, &p) <= 0 || p != 64)
58    {
59      printf ("Error (1) in mpfr_cmp2\n");
60      exit (1);
61    }
62  mpfr_set_str_binary(xx, "0.10100010001110110111000010001000010011111101000100011101000011100");
63  mpfr_set_str_binary(yy, "0.10100010001110110111000010001000010011111101000100011101000011011");
64  p = 0;
65  if (mpfr_cmp2 (xx, yy, &p) <= 0 || p != 64)
66    {
67      printf ("Error (2) in mpfr_cmp2\n");
68      exit (1);
69    }
70
71  mpfr_set_prec (xx, 160); mpfr_set_prec (yy, 160);
72  mpfr_set_str_binary (xx, "0.1E1");
73  mpfr_set_str_binary (yy, "0.1111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111100000110001110100");
74  p = 0;
75  if (mpfr_cmp2 (xx, yy, &p) <= 0 || p != 144)
76    {
77      printf ("Error (3) in mpfr_cmp2\n");
78      exit (1);
79    }
80
81  mpfr_set_prec (xx, 53);
82  mpfr_set_prec (yy, 200);
83  mpfr_set_ui (xx, 1, (mpfr_rnd_t) 0);
84  mpfr_set_ui (yy, 1, (mpfr_rnd_t) 0);
85  if (mpfr_cmp (xx, yy) != 0)
86    {
87      printf ("Error in mpfr_cmp: 1.0 != 1.0\n");
88      exit (1);
89    }
90  mpfr_set_prec (yy, 31);
91  mpfr_set_str (xx, "1.0000000002", 10, (mpfr_rnd_t) 0);
92  mpfr_set_ui (yy, 1, (mpfr_rnd_t) 0);
93  if (!(mpfr_cmp (xx,yy)>0))
94    {
95      printf ("Error in mpfr_cmp: not 1.0000000002 > 1.0\n");
96      exit (1);
97    }
98  mpfr_set_prec (yy, 53);
99
100  /* bug found by Gerardo Ballabio */
101  mpfr_set_ui(xx, 0, MPFR_RNDN);
102  mpfr_set_str (yy, "0.1", 10, MPFR_RNDN);
103  if ((c = mpfr_cmp (xx, yy)) >= 0)
104    {
105      printf ("Error in mpfr_cmp(0.0, 0.1), gives %d\n", c);
106      exit (1);
107    }
108
109  mpfr_set_inf (xx, 1);
110  mpfr_set_str (yy, "-23489745.0329", 10, MPFR_RNDN);
111  if ((c = mpfr_cmp (xx, yy)) <= 0)
112    {
113      printf ("Error in mpfr_cmp(Infp, 23489745.0329), gives %d\n", c);
114      exit (1);
115    }
116
117  mpfr_set_inf (xx, 1);
118  mpfr_set_inf (yy, -1);
119  if ((c = mpfr_cmp (xx, yy)) <= 0)
120    {
121      printf ("Error in mpfr_cmp(Infp, Infm), gives %d\n", c);
122      exit (1);
123    }
124
125  mpfr_set_inf (xx, -1);
126  mpfr_set_inf (yy, 1);
127  if ((c = mpfr_cmp (xx, yy)) >= 0)
128    {
129      printf ("Error in mpfr_cmp(Infm, Infp), gives %d\n", c);
130      exit (1);
131    }
132
133  mpfr_set_inf (xx, 1);
134  mpfr_set_inf (yy, 1);
135  if ((c = mpfr_cmp (xx, yy)) != 0)
136    {
137      printf ("Error in mpfr_cmp(Infp, Infp), gives %d\n", c);
138      exit (1);
139    }
140
141  mpfr_set_inf (xx, -1);
142  mpfr_set_inf (yy, -1);
143  if ((c = mpfr_cmp (xx, yy)) != 0)
144    {
145      printf ("Error in mpfr_cmp(Infm, Infm), gives %d\n", c);
146      exit (1);
147    }
148
149  mpfr_set_inf (xx, -1);
150  mpfr_set_str (yy, "2346.09234", 10, MPFR_RNDN);
151  if ((c = mpfr_cmp (xx, yy)) >= 0)
152    {
153      printf ("Error in mpfr_cmp(Infm, 2346.09234), gives %d\n", c);
154      exit (1);
155    }
156
157  mpfr_set_ui (xx, 0, MPFR_RNDN);
158  mpfr_set_ui (yy, 1, MPFR_RNDN);
159  if ((c = mpfr_cmp3 (xx, yy, 1)) >= 0)
160    {
161      printf ("Error: mpfr_cmp3 (0, 1, 1) gives %d instead of"
162              " a negative value\n", c);
163      exit (1);
164    }
165  if ((c = mpfr_cmp3 (xx, yy, -1)) <= 0)
166    {
167      printf ("Error: mpfr_cmp3 (0, 1, -1) gives %d instead of"
168              " a positive value\n", c);
169      exit (1);
170    }
171
172  for (i=0; i<500000; )
173    {
174      x = DBL_RAND ();
175      y = DBL_RAND ();
176      if (!Isnan(x) && !Isnan(y))
177        {
178          i++;
179          mpfr_set_d (xx, x, MPFR_RNDN);
180          mpfr_set_d (yy, y, MPFR_RNDN);
181          c = mpfr_cmp (xx,yy);
182          if ((c>0 && x<=y) || (c==0 && x!=y) || (c<0 && x>=y))
183            {
184              printf ("Error in mpfr_cmp with x=%1.20e, y=%1.20e"
185                      " mpfr_cmp(x,y)=%d\n", x, y, c);
186              exit (1);
187            }
188        }
189    }
190
191  /* Check for NAN */
192  mpfr_set_nan (xx);
193  mpfr_clear_erangeflag ();
194  c = (mpfr_cmp) (xx, yy);
195  if (c != 0 || !mpfr_erangeflag_p () )
196    {
197      printf ("NAN error (1)\n");
198      exit (1);
199    }
200  mpfr_clear_erangeflag ();
201  c = (mpfr_cmp) (yy, xx);
202  if (c != 0 || !mpfr_erangeflag_p () )
203    {
204      printf ("NAN error (2)\n");
205      exit (1);
206    }
207  mpfr_clear_erangeflag ();
208  c = (mpfr_cmp) (xx, xx);
209  if (c != 0 || !mpfr_erangeflag_p () )
210    {
211      printf ("NAN error (3)\n");
212      exit (1);
213    }
214
215  mpfr_clear (xx);
216  mpfr_clear (yy);
217
218  tests_end_mpfr ();
219  return 0;
220}
221