| 1 | /* Define iscanonical macro. ldbl-96 version. |
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| 2 | Copyright (C) 2016-2022 Free Software Foundation, Inc. |
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| 3 | This file is part of the GNU C Library. |
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| 4 | |
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| 5 | The GNU C Library is free software; you can redistribute it and/or |
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| 6 | modify it under the terms of the GNU Lesser General Public |
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| 7 | License as published by the Free Software Foundation; either |
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| 8 | version 2.1 of the License, or (at your option) any later version. |
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| 9 | |
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| 10 | The GNU C Library is distributed in the hope that it will be useful, |
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| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 13 | Lesser General Public License for more details. |
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| 14 | |
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| 15 | You should have received a copy of the GNU Lesser General Public |
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| 16 | License along with the GNU C Library; if not, see |
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| 17 | <https://www.gnu.org/licenses/>. */ |
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| 18 | |
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| 19 | #ifndef _MATH_H |
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| 20 | # error "Never use <bits/iscanonical.h> directly; include <math.h> instead." |
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| 21 | #endif |
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| 22 | |
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| 23 | extern int __iscanonicall (long double __x) |
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| 24 | __THROW __attribute__ ((__const__)); |
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| 25 | #define __iscanonicalf(x) ((void) (__typeof (x)) (x), 1) |
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| 26 | #define __iscanonical(x) ((void) (__typeof (x)) (x), 1) |
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| 27 | #if __HAVE_DISTINCT_FLOAT128 |
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| 28 | # define __iscanonicalf128(x) ((void) (__typeof (x)) (x), 1) |
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| 29 | #endif |
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| 30 | |
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| 31 | /* Return nonzero value if X is canonical. In IEEE interchange binary |
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| 32 | formats, all values are canonical, but the argument must still be |
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| 33 | converted to its semantic type for any exceptions arising from the |
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| 34 | conversion, before being discarded; in extended precision, there |
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| 35 | are encodings that are not consistently handled as corresponding to |
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| 36 | any particular value of the type, and we return 0 for those. */ |
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| 37 | #ifndef __cplusplus |
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| 38 | # define iscanonical(x) __MATH_TG ((x), __iscanonical, (x)) |
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| 39 | #else |
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| 40 | /* In C++ mode, __MATH_TG cannot be used, because it relies on |
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| 41 | __builtin_types_compatible_p, which is a C-only builtin. On the |
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| 42 | other hand, overloading provides the means to distinguish between |
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| 43 | the floating-point types. The overloading resolution will match |
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| 44 | the correct parameter (regardless of type qualifiers (i.e.: const |
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| 45 | and volatile)). */ |
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| 46 | extern "C++" { |
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| 47 | inline int iscanonical (float __val) { return __iscanonicalf (__val); } |
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| 48 | inline int iscanonical (double __val) { return __iscanonical (__val); } |
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| 49 | inline int iscanonical (long double __val) { return __iscanonicall (x: __val); } |
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| 50 | # if __HAVE_DISTINCT_FLOAT128 |
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| 51 | inline int iscanonical (_Float128 __val) { return __iscanonicalf128 (__val); } |
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| 52 | # endif |
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| 53 | } |
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| 54 | #endif /* __cplusplus */ |
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| 55 | |
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