1 /* Test file for mpfr_sec.
2
3 Copyright 2005-2023 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 #include "mpfr-test.h"
24
25 #define TEST_FUNCTION mpfr_sec
26 #define REDUCE_EMAX 262143 /* otherwise arg. reduction is too expensive */
27 #include "tgeneric.c"
28
29 static void
check_specials(void)30 check_specials (void)
31 {
32 mpfr_t x, y;
33
34 mpfr_init2 (x, 123L);
35 mpfr_init2 (y, 123L);
36
37 mpfr_set_nan (x);
38 mpfr_sec (y, x, MPFR_RNDN);
39 if (! mpfr_nan_p (y))
40 {
41 printf ("Error: sec(NaN) != NaN\n");
42 exit (1);
43 }
44
45 mpfr_set_inf (x, 1);
46 mpfr_sec (y, x, MPFR_RNDN);
47 if (! mpfr_nan_p (y))
48 {
49 printf ("Error: sec(Inf) != NaN\n");
50 exit (1);
51 }
52
53 mpfr_set_inf (x, -1);
54 mpfr_sec (y, x, MPFR_RNDN);
55 if (! mpfr_nan_p (y))
56 {
57 printf ("Error: sec(-Inf) != NaN\n");
58 exit (1);
59 }
60
61 /* sec(+/-0) = 1 */
62 mpfr_set_ui (x, 0, MPFR_RNDN);
63 mpfr_sec (y, x, MPFR_RNDN);
64 if (mpfr_cmp_ui (y, 1))
65 {
66 printf ("Error: sec(+0) != 1\n");
67 exit (1);
68 }
69 mpfr_neg (x, x, MPFR_RNDN);
70 mpfr_sec (y, x, MPFR_RNDN);
71 if (mpfr_cmp_ui (y, 1))
72 {
73 printf ("Error: sec(-0) != 1\n");
74 exit (1);
75 }
76
77 mpfr_clear (x);
78 mpfr_clear (y);
79 }
80
81 static void
overflowed_sec0(void)82 overflowed_sec0 (void)
83 {
84 mpfr_t x, y;
85 int emax, i, inex, rnd, err = 0;
86 mpfr_exp_t old_emax;
87
88 old_emax = mpfr_get_emax ();
89
90 mpfr_init2 (x, 8);
91 mpfr_init2 (y, 8);
92
93 for (emax = -1; emax <= 0; emax++)
94 {
95 mpfr_set_ui_2exp (y, 1, emax, MPFR_RNDN);
96 mpfr_nextbelow (y);
97 set_emax (emax); /* 1 is not representable. */
98 for (i = -1; i <= 1; i++)
99 RND_LOOP_NO_RNDF (rnd)
100 {
101 mpfr_set_si_2exp (x, i, -512 * ABS (i), MPFR_RNDN);
102 mpfr_clear_flags ();
103 inex = mpfr_sec (x, x, (mpfr_rnd_t) rnd);
104 if (! mpfr_overflow_p ())
105 {
106 printf ("Error in overflowed_sec0 (i = %d, rnd = %s):\n"
107 " The overflow flag is not set.\n",
108 i, mpfr_print_rnd_mode ((mpfr_rnd_t) rnd));
109 err = 1;
110 }
111 if (rnd == MPFR_RNDZ || rnd == MPFR_RNDD)
112 {
113 if (inex >= 0)
114 {
115 printf ("Error in overflowed_sec0 (i = %d, rnd = %s):\n"
116 " The inexact value must be negative.\n",
117 i, mpfr_print_rnd_mode ((mpfr_rnd_t) rnd));
118 err = 1;
119 }
120 if (! mpfr_equal_p (x, y))
121 {
122 printf ("Error in overflowed_sec0 (i = %d, rnd = %s):\n"
123 " Got ", i,
124 mpfr_print_rnd_mode ((mpfr_rnd_t) rnd));
125 mpfr_dump (x);
126 printf (" instead of 0.11111111E%d.\n", emax);
127 err = 1;
128 }
129 }
130 else
131 {
132 if (inex <= 0)
133 {
134 printf ("Error in overflowed_sec0 (i = %d, rnd = %s):\n"
135 " The inexact value must be positive.\n",
136 i, mpfr_print_rnd_mode ((mpfr_rnd_t) rnd));
137 err = 1;
138 }
139 if (! (mpfr_inf_p (x) && MPFR_IS_POS (x)))
140 {
141 printf ("Error in overflowed_sec0 (i = %d, rnd = %s):\n"
142 " Got ", i,
143 mpfr_print_rnd_mode ((mpfr_rnd_t) rnd));
144 mpfr_dump (x);
145 printf (" instead of +Inf.\n");
146 err = 1;
147 }
148 }
149 }
150 set_emax (old_emax);
151 }
152
153 if (err)
154 exit (1);
155 mpfr_clear (x);
156 mpfr_clear (y);
157 }
158
159 int
main(int argc,char * argv[])160 main (int argc, char *argv[])
161 {
162 tests_start_mpfr ();
163
164 check_specials ();
165
166 test_generic (MPFR_PREC_MIN, 200, 10);
167 overflowed_sec0 ();
168
169 tests_end_mpfr ();
170 return 0;
171 }
172