libstdc++: cfenv Source File

libstdc++

cfenv
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1// <cfenv> -*- C++ -*-
2
3// Copyright (C) 2007-2026 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
60namespace 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
fenv.h
c++0x_warning.h
c++config.h
std
ISO C++ entities toplevel namespace is std.