1 /* Test file for mpfr_get_exp and mpfr_set_exp.
2
3 Copyright 2004, 2006-2023 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 int
main(int argc,char * argv[])26 main (int argc, char *argv[])
27 {
28 mpfr_t x;
29 int ret;
30 mpfr_exp_t emin, emax, e;
31 int i = 0;
32
33 tests_start_mpfr ();
34
35 emin = mpfr_get_emin ();
36 emax = mpfr_get_emax ();
37
38 mpfr_init2 (x, 53);
39
40 mpfr_set_ui (x, 1, MPFR_RNDN);
41 ret = mpfr_set_exp (x, 2);
42 MPFR_ASSERTN (ret == 0 && mpfr_cmp_ui (x, 2) == 0);
43 e = mpfr_get_exp (x);
44 MPFR_ASSERTN (e == 2);
45 e = (mpfr_get_exp) (x);
46 MPFR_ASSERTN (e == 2);
47
48 ret = mpfr_set_exp (x, emax);
49 e = mpfr_get_exp (x);
50 MPFR_ASSERTN (e == emax);
51 e = (mpfr_get_exp) (x);
52 MPFR_ASSERTN (e == emax);
53
54 ret = mpfr_set_exp (x, emin);
55 e = mpfr_get_exp (x);
56 MPFR_ASSERTN (e == emin);
57 e = (mpfr_get_exp) (x);
58 MPFR_ASSERTN (e == emin);
59
60 set_emin (-1);
61
62 e = mpfr_get_exp (x);
63 MPFR_ASSERTN (e == emin);
64 e = (mpfr_get_exp) (x);
65 MPFR_ASSERTN (e == emin);
66
67 #ifdef IGNORE_CPP_COMPAT
68 #pragma GCC diagnostic push
69 #pragma GCC diagnostic ignored "-Wc++-compat"
70 #endif
71 e = mpfr_get_exp ((i++, VOIDP_CAST(x)));
72 #ifdef IGNORE_CPP_COMPAT
73 #pragma GCC diagnostic pop
74 #endif
75 MPFR_ASSERTN (e == emin);
76 MPFR_ASSERTN (i == 1);
77
78 ret = mpfr_set_exp (x, -1);
79 MPFR_ASSERTN (ret == 0 && mpfr_cmp_ui_2exp (x, 1, -2) == 0);
80
81 set_emax (1);
82 ret = mpfr_set_exp (x, 1);
83 MPFR_ASSERTN (ret == 0 && mpfr_cmp_ui (x, 1) == 0);
84
85 ret = mpfr_set_exp (x, -2);
86 MPFR_ASSERTN (ret != 0 && mpfr_cmp_ui (x, 1) == 0);
87
88 ret = mpfr_set_exp (x, 2);
89 MPFR_ASSERTN (ret != 0 && mpfr_cmp_ui (x, 1) == 0);
90
91 mpfr_clear (x);
92
93 set_emin (emin);
94 set_emax (emax);
95
96 tests_end_mpfr ();
97 return 0;
98 }
99