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| 1 | /* Define iscanonical macro. ldbl-128ibm version. |
|---|---|
| 2 | Copyright (C) 2016-2024 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 | |
| 23 | #if defined (__NO_LONG_DOUBLE_MATH) || __LDOUBLE_REDIRECTS_TO_FLOAT128_ABI == 1 |
| 24 | # define iscanonical(x) ((void) (__typeof (x)) (x), 1) |
| 25 | #else |
| 26 | extern int __iscanonicall (long double __x) |
| 27 | __THROW __attribute__ ((__const__)); |
| 28 | # define __iscanonicalf(x) ((void) (__typeof (x)) (x), 1) |
| 29 | # define __iscanonical(x) ((void) (__typeof (x)) (x), 1) |
| 30 | # if __HAVE_DISTINCT_FLOAT128 |
| 31 | # define __iscanonicalf128(x) ((void) (__typeof (x)) (x), 1) |
| 32 | # endif |
| 33 | |
| 34 | /* Return nonzero value if X is canonical. In IEEE interchange binary |
| 35 | formats, all values are canonical, but the argument must still be |
| 36 | converted to its semantic type for any exceptions arising from the |
| 37 | conversion, before being discarded; in IBM long double, there are |
| 38 | encodings that are not consistently handled as corresponding to any |
| 39 | particular value of the type, and we return 0 for those. */ |
| 40 | # ifndef __cplusplus |
| 41 | # define iscanonical(x) __MATH_TG ((x), __iscanonical, (x)) |
| 42 | # else |
| 43 | /* In C++ mode, __MATH_TG cannot be used, because it relies on |
| 44 | __builtin_types_compatible_p, which is a C-only builtin. On the |
| 45 | other hand, overloading provides the means to distinguish between |
| 46 | the floating-point types. The overloading resolution will match |
| 47 | the correct parameter (regardless of type qualifiers (i.e.: const |
| 48 | and volatile)). */ |
| 49 | extern "C++" { |
| 50 | inline int iscanonical (float __val) { return __iscanonicalf (__val); } |
| 51 | inline int iscanonical (double __val) { return __iscanonical (__val); } |
| 52 | inline int iscanonical (long double __val) { return __iscanonicall (__val); } |
| 53 | # if __HAVE_DISTINCT_FLOAT128 |
| 54 | inline int iscanonical (_Float128 __val) { return __iscanonicalf128 (__val); } |
| 55 | # endif |
| 56 | } |
| 57 | # endif /* __cplusplus */ |
| 58 | #endif /* __NO_LONG_DOUBLE_MATH */ |
| 59 |
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