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
|
/* Define iscanonical macro. ldbl-128ibm version.
Copyright (C) 2016-2019 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C 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 2.1 of the License, or (at your option) any later version.
The GNU C 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 C Library; if not, see
<https://www.gnu.org/licenses/>. */
#ifndef _MATH_H
# error "Never use <bits/iscanonical.h> directly; include <math.h> instead."
#endif
#ifdef __NO_LONG_DOUBLE_MATH
# define iscanonical(x) ((void) (__typeof (x)) (x), 1)
#else
extern int __iscanonicall (long double __x)
__THROW __attribute__ ((__const__));
# define __iscanonicalf(x) ((void) (__typeof (x)) (x), 1)
# define __iscanonical(x) ((void) (__typeof (x)) (x), 1)
# if __HAVE_DISTINCT_FLOAT128
# define __iscanonicalf128(x) ((void) (__typeof (x)) (x), 1)
# endif
/* Return nonzero value if X is canonical. In IEEE interchange binary
formats, all values are canonical, but the argument must still be
converted to its semantic type for any exceptions arising from the
conversion, before being discarded; in IBM long double, there are
encodings that are not consistently handled as corresponding to any
particular value of the type, and we return 0 for those. */
# ifndef __cplusplus
# define iscanonical(x) __MATH_TG ((x), __iscanonical, (x))
# else
/* In C++ mode, __MATH_TG cannot be used, because it relies on
__builtin_types_compatible_p, which is a C-only builtin. On the
other hand, overloading provides the means to distinguish between
the floating-point types. The overloading resolution will match
the correct parameter (regardless of type qualifiers (i.e.: const
and volatile)). */
extern "C++" {
inline int iscanonical (float __val) { return __iscanonicalf (__val); }
inline int iscanonical (double __val) { return __iscanonical (__val); }
inline int iscanonical (long double __val) { return __iscanonicall (__val); }
# if __HAVE_DISTINCT_FLOAT128
inline int iscanonical (_Float128 __val) { return __iscanonicalf128 (__val); }
# endif
}
# endif /* __cplusplus */
#endif /* __NO_LONG_DOUBLE_MATH */
|
