1/* Define iscanonical macro. ldbl-96 version. 
2 Copyright (C) 2016-2020 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 <https://www.gnu.org/licenses/>. */ 
18 
19#ifndef _MATH_H 
20# error "Never use <bits/iscanonical.h> directly; include <math.h> instead." 
21#endif 
22 
23extern 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)). */ 
46extern "C++" { 
47inline int iscanonical (float __val) { return __iscanonicalf (__val); } 
48inline int iscanonical (double __val) { return __iscanonical (__val); } 
49inline int iscanonical (long double __val) { return __iscanonicall (__val); } 
50# if __HAVE_DISTINCT_FLOAT128 
51inline int iscanonical (_Float128 __val) { return __iscanonicalf128 (__val); } 
52# endif 
53} 
54#endif /* __cplusplus */ 
55