1 | /* Define iscanonical macro. ldbl-96 version. |
2 | Copyright (C) 2016-2018 Free Software Foundation, Inc. |
3 | This file is part of the GNU C Library. |
4 | |
5 | The GNU C Library is free software; you can redistribute it and/or |
6 | modify it under the terms of the GNU Lesser General Public |
7 | License as published by the Free Software Foundation; either |
8 | version 2.1 of the License, or (at your option) any later version. |
9 | |
10 | The GNU C Library is distributed in the hope that it will be useful, |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
13 | Lesser General Public License for more details. |
14 | |
15 | You should have received a copy of the GNU Lesser General Public |
16 | License along with the GNU C Library; if not, see |
17 | <http://www.gnu.org/licenses/>. */ |
18 | |
19 | #ifndef _MATH_H |
20 | # error "Never use <bits/iscanonical.h> directly; include <math.h> instead." |
21 | #endif |
22 | |
23 | extern int __iscanonicall (long double __x) |
24 | __THROW __attribute__ ((__const__)); |
25 | #define __iscanonicalf(x) ((void) (__typeof (x)) (x), 1) |
26 | #define __iscanonical(x) ((void) (__typeof (x)) (x), 1) |
27 | #if __HAVE_DISTINCT_FLOAT128 |
28 | # define __iscanonicalf128(x) ((void) (__typeof (x)) (x), 1) |
29 | #endif |
30 | |
31 | /* Return nonzero value if X is canonical. In IEEE interchange binary |
32 | formats, all values are canonical, but the argument must still be |
33 | converted to its semantic type for any exceptions arising from the |
34 | conversion, before being discarded; in extended precision, there |
35 | are encodings that are not consistently handled as corresponding to |
36 | any particular value of the type, and we return 0 for those. */ |
37 | #ifndef __cplusplus |
38 | # define iscanonical(x) __MATH_TG ((x), __iscanonical, (x)) |
39 | #else |
40 | /* In C++ mode, __MATH_TG cannot be used, because it relies on |
41 | __builtin_types_compatible_p, which is a C-only builtin. On the |
42 | other hand, overloading provides the means to distinguish between |
43 | the floating-point types. The overloading resolution will match |
44 | the correct parameter (regardless of type qualifiers (i.e.: const |
45 | and volatile)). */ |
46 | extern "C++" { |
47 | inline int iscanonical (float __val) { return __iscanonicalf (__val); } |
48 | inline int iscanonical (double __val) { return __iscanonical (__val); } |
49 | inline int iscanonical (long double __val) { return __iscanonicall (__val); } |
50 | # if __HAVE_DISTINCT_FLOAT128 |
51 | inline int iscanonical (_Float128 __val) { return __iscanonicalf128 (__val); } |
52 | # endif |
53 | } |
54 | #endif /* __cplusplus */ |
55 | |