1/* Test file for mpfr_out_str.
2
3Copyright 1999, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 Free Software Foundation, Inc.
4Contributed by the AriC and Caramel 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 <float.h>
24#include <stdlib.h>
25
26#include "mpfr-test.h"
27
28FILE *fout;
29
30#define check(d,r,b) check4(d,r,b,53)
31
32static void
33check4 (double d, mpfr_rnd_t rnd, int base, int prec)
34{
35  mpfr_t x;
36
37  mpfr_init2 (x, prec);
38  mpfr_set_d (x, d, rnd);
39  fprintf (fout, "%1.19e base %d rnd %d:\n ", d, base, rnd);
40  mpfr_out_str (fout, base, (base == 2) ? prec : 0, x, rnd);
41  fputc ('\n', fout);
42  mpfr_clear (x);
43}
44
45static void
46special (void)
47{
48  mpfr_t x;
49  unsigned int n;
50
51  mpfr_init (x);
52
53  mpfr_set_nan (x);
54  n = mpfr_out_str (fout, 10, 0, x, MPFR_RNDN);
55  if (n != 5)
56    {
57      printf ("Error: mpfr_out_str (file, 10, 0, NaN, MPFR_RNDN) wrote %u "
58              "characters instead of 5.\n", n);
59      exit (1);
60    }
61
62  mpfr_set_inf (x, 1);
63  n = mpfr_out_str (fout, 10, 0, x, MPFR_RNDN);
64  if (n != 5)
65    {
66      printf ("Error: mpfr_out_str (file, 10, 0, +Inf, MPFR_RNDN) wrote %u "
67               "characters instead of 5.\n", n);
68      exit (1);
69    }
70
71  mpfr_set_inf (x, -1);
72  n = mpfr_out_str (fout, 10, 0, x, MPFR_RNDN);
73  if (n != 6)
74    {
75      printf ("Error: mpfr_out_str (file, 10, 0, -Inf, MPFR_RNDN) wrote %u "
76               "characters instead of 6.\n", n);
77      exit (1);
78    }
79
80  mpfr_set_ui (x, 0, MPFR_RNDN);
81  n = mpfr_out_str (fout, 10, 0, x, MPFR_RNDN);
82  if (n != 1)
83    {
84      printf ("Error: mpfr_out_str (file, 10, 0, +0, MPFR_RNDN) wrote %u "
85               "characters instead of 1.\n", n);
86      exit (1);
87    }
88
89  mpfr_neg (x, x, MPFR_RNDN);
90  n = mpfr_out_str (fout, 10, 0, x, MPFR_RNDN);
91  if (n != 2)
92    {
93      printf ("Error: mpfr_out_str (file, 10, 0, -0, MPFR_RNDN) wrote %u "
94               "characters instead of 2.\n", n);
95      exit (1);
96    }
97
98  mpfr_clear (x);
99}
100
101int
102main (int argc, char *argv[])
103{
104  int i, N=10000, p;
105  mpfr_rnd_t rnd;
106  double d;
107
108  tests_start_mpfr ();
109
110  /* with no argument: prints to /dev/null,
111     tout_str N: prints N tests to stdout */
112  if (argc == 1)
113    {
114      fout = fopen ("/dev/null", "w");
115      /* If we failed to open this device, try with a dummy file */
116      if (fout == NULL)
117        fout = fopen ("mpfrtest.txt", "w");
118    }
119  else
120    {
121      fout = stdout;
122      N = atoi (argv[1]);
123    }
124
125  if (fout == NULL)
126    {
127      printf ("Can't open /dev/null or stdout\n");
128      exit (1);
129    }
130
131  special ();
132
133  check (-1.37247529013405550000e+15, MPFR_RNDN, 7);
134  check (-1.5674376729569697500e+15, MPFR_RNDN, 19);
135  check (-5.71262771772792640000e-79, MPFR_RNDU, 16);
136  check (DBL_NEG_ZERO, MPFR_RNDU, 7);
137  check (-4.5306392613572974756e-308, MPFR_RNDN, 8);
138  check (-6.7265890111403371523e-165, MPFR_RNDN, 4);
139  check (-1.3242553591261807653e+156, MPFR_RNDN, 16);
140  check (-6.606499965302424244461355e233, MPFR_RNDN, 10);
141  check4 (1.0, MPFR_RNDN, 10, 120);
142  check (1.0, MPFR_RNDU, 10);
143  check (4.059650008e-83, MPFR_RNDN, 10);
144  check (-7.4, MPFR_RNDN, 10);
145  check (0.997, MPFR_RNDN, 10);
146  check (-4.53063926135729747564e-308, MPFR_RNDN, 10);
147  check (2.14478198760196000000e+16, MPFR_RNDN, 10);
148  check (7.02293374921793516813e-84, MPFR_RNDN, 10);
149
150  /* random tests */
151  for (i=0;i<N;i++)
152    {
153      do
154        {
155          d = DBL_RAND ();
156        }
157#ifdef HAVE_DENORMS
158      while (0);
159#else
160      while (ABS(d) < DBL_MIN);
161#endif
162      rnd = RND_RAND ();
163      p = 2 + randlimb () % 61;
164      check (d, rnd, p);
165    }
166
167  fclose (fout);
168
169  tests_end_mpfr ();
170  return 0;
171}
172