libstdc++
cfenv
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1 // <cfenv> -*- C++ -*-
2 
3 // Copyright (C) 2007-2025 Free Software Foundation, Inc.
4 //
5 // This file is part of the GNU ISO C++ Library. This library is free
6 // software; you can redistribute it and/or modify it under the
7 // terms of the GNU General Public License as published by the
8 // Free Software Foundation; either version 3, or (at your option)
9 // any later version.
10 
11 // This library is distributed in the hope that it will be useful,
12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 // GNU General Public License for more details.
15 
16 // Under Section 7 of GPL version 3, you are granted additional
17 // permissions described in the GCC Runtime Library Exception, version
18 // 3.1, as published by the Free Software Foundation.
19 
20 // You should have received a copy of the GNU General Public License and
21 // a copy of the GCC Runtime Library Exception along with this program;
22 // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
23 // <http://www.gnu.org/licenses/>.
24 
25 /** @file include/cfenv
26  * This is a Standard C++ Library header.
27  */
28 
29 #ifndef _GLIBCXX_CFENV
30 #define _GLIBCXX_CFENV 1
31 
32 #ifdef _GLIBCXX_SYSHDR
33 #pragma GCC system_header
34 #endif
35 
36 #if __cplusplus < 201103L
37 # include <bits/c++0x_warning.h>
38 #else
39 
40 #include <bits/c++config.h>
41 
42 #if _GLIBCXX_HAVE_FENV_H
43 # include <fenv.h>
44 #endif
45 
46 #ifdef _GLIBCXX_USE_C99_FENV
47 
48 #undef feclearexcept
49 #undef fegetexceptflag
50 #undef feraiseexcept
51 #undef fesetexceptflag
52 #undef fetestexcept
53 #undef fegetround
54 #undef fesetround
55 #undef fegetenv
56 #undef feholdexcept
57 #undef fesetenv
58 #undef feupdateenv
59 
60 namespace std
61 {
62  // types
63  using ::fenv_t;
64  using ::fexcept_t;
65 
66  // functions
67  using ::feclearexcept;
68  using ::fegetexceptflag;
69  using ::feraiseexcept;
70  using ::fesetexceptflag;
71  using ::fetestexcept;
72 
73  using ::fegetround;
74  using ::fesetround;
75 
76  using ::fegetenv;
77  using ::feholdexcept;
78  using ::fesetenv;
79  using ::feupdateenv;
80 } // namespace std
81 
82 #endif // _GLIBCXX_USE_C99_FENV
83 
84 #endif // C++11
85 
86 #endif // _GLIBCXX_CFENV