1 /* Test file for mpfr_out_str.
2
3 Copyright 1999, 2001-2023 Free Software Foundation, Inc.
4 Contributed by the AriC and Caramba projects, INRIA.
5
6 This file is part of the GNU MPFR Library.
7
8 The GNU MPFR Library is free software; you can redistribute it and/or modify
9 it under the terms of the GNU Lesser General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or (at your
11 option) any later version.
12
13 The GNU MPFR Library is distributed in the hope that it will be useful, but
14 WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
15 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
16 License for more details.
17
18 You should have received a copy of the GNU Lesser General Public License
19 along with the GNU MPFR Library; see the file COPYING.LESSER. If not, see
20 https://www.gnu.org/licenses/ or write to the Free Software Foundation, Inc.,
21 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. */
22
23 /* FIXME: The output is not tested (thus coverage data are meaningless). */
24
25 #include <float.h>
26
27 #include "mpfr-test.h"
28
29 FILE *fout;
30
31 #define check(d,r,b) check4(d,r,b,53)
32
33 static void
34 check4 (double d, mpfr_rnd_t rnd, int base, int prec)
35 {
36 mpfr_t x;
37
38 mpfr_init2 (x, prec);
39 mpfr_set_d (x, d, rnd);
40 fprintf (fout, "%1.19e base %d %s:\n ", d, base, mpfr_print_rnd_mode (rnd));
41 mpfr_out_str (fout, base, (base == 2) ? prec : 0, x, rnd);
42 fputc ('\n', fout);
43 mpfr_clear (x);
44 }
45
46 static void
47 special (void)
48 {
49 mpfr_t x;
50 unsigned int n;
51
52 mpfr_init (x);
53
54 mpfr_set_nan (x);
55 n = mpfr_out_str (fout, 10, 0, x, MPFR_RNDN);
56 fputc ('\n', fout);
57 if (n != 5)
58 {
59 printf ("Error: mpfr_out_str (file, 10, 0, NaN, MPFR_RNDN) wrote %u "
60 "characters instead of 5.\n", n);
61 exit (1);
62 }
63
64 mpfr_set_inf (x, 1);
65 n = mpfr_out_str (fout, 10, 0, x, MPFR_RNDN);
66 fputc ('\n', fout);
67 if (n != 5)
68 {
69 printf ("Error: mpfr_out_str (file, 10, 0, +Inf, MPFR_RNDN) wrote %u "
70 "characters instead of 5.\n", n);
71 exit (1);
72 }
73
74 mpfr_set_inf (x, -1);
75 n = mpfr_out_str (fout, 10, 0, x, MPFR_RNDN);
76 fputc ('\n', fout);
77 if (n != 6)
78 {
79 printf ("Error: mpfr_out_str (file, 10, 0, -Inf, MPFR_RNDN) wrote %u "
80 "characters instead of 6.\n", n);
81 exit (1);
82 }
83
84 mpfr_set_ui (x, 0, MPFR_RNDN);
85 n = mpfr_out_str (fout, 10, 0, x, MPFR_RNDN);
86 fputc ('\n', fout);
87 if (n != 1)
88 {
89 printf ("Error: mpfr_out_str (file, 10, 0, +0, MPFR_RNDN) wrote %u "
90 "characters instead of 1.\n", n);
91 exit (1);
92 }
93
94 mpfr_neg (x, x, MPFR_RNDN);
95 n = mpfr_out_str (fout, 10, 0, x, MPFR_RNDN);
96 fputc ('\n', fout);
97 if (n != 2)
98 {
99 printf ("Error: mpfr_out_str (file, 10, 0, -0, MPFR_RNDN) wrote %u "
100 "characters instead of 2.\n", n);
101 exit (1);
102 }
103
104 mpfr_clear (x);
105 }
106
107 int
108 main (int argc, char *argv[])
109 {
110 const char *fname = "tout_str_out.txt";
111 int i, N = 10000;
112
113 tests_start_mpfr ();
114
115 /* with no argument: prints to a temporary file,
116 tout_str N: prints N tests to stdout */
117 if (argc == 1)
118 {
119 fout = fopen (fname, "w");
120 if (fout == NULL)
121 {
122 perror (NULL);
123 fprintf (stderr, "Failed to open \"%s\" for writing\n", fname);
124 exit (1);
125 }
126 }
127 else
128 {
129 fout = stdout;
130 N = atoi (argv[1]);
131 }
132
133 special ();
134
135 check (-1.37247529013405550000e+15, MPFR_RNDN, 7);
136 check (-1.5674376729569697500e+15, MPFR_RNDN, 19);
137 check (-5.71262771772792640000e-79, MPFR_RNDU, 16);
138 check (DBL_NEG_ZERO, MPFR_RNDU, 7);
139 check (-4.5306392613572974756e-308, MPFR_RNDN, 8);
140 check (-6.7265890111403371523e-165, MPFR_RNDN, 4);
141 check (-1.3242553591261807653e+156, MPFR_RNDN, 16);
142 check (-6.606499965302424244461355e233, MPFR_RNDN, 10);
143 check4 (1.0, MPFR_RNDN, 10, 120);
144 check (1.0, MPFR_RNDU, 10);
145 check (4.059650008e-83, MPFR_RNDN, 10);
146 check (-7.4, MPFR_RNDN, 10);
147 check (0.997, MPFR_RNDN, 10);
148 check (-4.53063926135729747564e-308, MPFR_RNDN, 10);
149 check (2.14478198760196000000e+16, MPFR_RNDN, 10);
150 check (7.02293374921793516813e-84, MPFR_RNDN, 10);
151
152 /* random tests */
153 for (i = 0; i < N; i++)
154 {
155 double d;
156 mpfr_rnd_t rnd;
157 int b;
158
159 d = DBL_RAND ();
160 rnd = RND_RAND ();
161 do
162 b = (randlimb () % (62 + 36 + 1)) - 36;
163 while (b > -2 && b < 2);
164 check (d, rnd, b);
165 }
166
167 if (fout != stdout)
168 {
169 if (fclose (fout) != 0)
170 {
171 perror (NULL);
172 fprintf (stderr, "Failed to close \"%s\"\n", fname);
173 exit (1);
174 }
175 remove (fname);
176 }
177
178 tests_end_mpfr ();
179 return 0;
180 }