1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
|
/* tsgn -- Test for the sign of a floating point number.
Copyright 2003, 2006-2020 Free Software Foundation, Inc.
Contributed by the AriC and Caramba projects, INRIA.
This file is part of the GNU MPFR Library.
The GNU MPFR Library is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 3 of the License, or (at your
option) any later version.
The GNU MPFR Library is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
License for more details.
You should have received a copy of the GNU Lesser General Public License
along with the GNU MPFR Library; see the file COPYING.LESSER. If not, see
https://www.gnu.org/licenses/ or write to the Free Software Foundation, Inc.,
51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. */
#define MPFR_TESTS_TSGN 1
#include "mpfr-test.h"
static void
check_special (void)
{
mpfr_t x;
int ret = 0;
mpfr_init (x);
MPFR_SET_ZERO (x);
if ((mpfr_sgn) (x) != 0 || mpfr_sgn (x) != 0)
{
printf("Sgn error for 0.\n");
ret = 1;
}
MPFR_SET_INF (x);
MPFR_SET_POS (x);
if ((mpfr_sgn) (x) != 1 || mpfr_sgn (x) != 1)
{
printf("Sgn error for +Inf.\n");
ret = 1;
}
MPFR_SET_INF (x);
MPFR_SET_NEG (x);
if ((mpfr_sgn) (x) != -1 || mpfr_sgn (x) != -1)
{
printf("Sgn error for -Inf.\n");
ret = 1;
}
MPFR_SET_NAN (x);
mpfr_clear_flags ();
if ((mpfr_sgn) (x) != 0 || !mpfr_erangeflag_p ())
{
printf("Sgn error for NaN.\n");
ret = 1;
}
mpfr_clear_flags ();
if (mpfr_sgn (x) != 0 || !mpfr_erangeflag_p ())
{
printf("Sgn error for NaN.\n");
ret = 1;
}
mpfr_clear (x);
if (ret)
exit (ret);
}
static void
check_sgn(void)
{
mpfr_t x;
int i, s1, s2;
mpfr_init(x);
for(i = 0 ; i < 100 ; i++)
{
mpfr_urandomb (x, RANDS);
if (i&1)
{
MPFR_SET_POS(x);
s2 = 1;
}
else
{
MPFR_SET_NEG(x);
s2 = -1;
}
s1 = mpfr_sgn(x);
if (s1 < -1 || s1 > 1)
{
printf("Error for sgn: out of range.\n");
goto lexit;
}
else if (MPFR_IS_NAN(x) || MPFR_IS_ZERO(x))
{
if (s1 != 0)
{
printf("Error for sgn: Nan or Zero should return 0.\n");
goto lexit;
}
}
else if (s1 != s2)
{
printf("Error for sgn. Return %d instead of %d.\n", s1, s2);
goto lexit;
}
}
mpfr_clear(x);
return;
lexit:
mpfr_clear(x);
exit(1);
}
int
main (int argc, char *argv[])
{
tests_start_mpfr ();
check_special ();
check_sgn ();
tests_end_mpfr ();
return 0;
}
|
