1// -*- C++ -*-
 2//===----------------------------------------------------------------------===//
 3//
 4// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
 5// See https://llvm.org/LICENSE.txt for license information.
 6// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 7//
 8//===----------------------------------------------------------------------===//
 9
10#ifndef _LIBCPP_CFENV
11#define _LIBCPP_CFENV
12
13/*
14    cfenv synopsis
15
16This entire header is C99 / C++0X
17
18Macros:
19
20    FE_DIVBYZERO
21    FE_INEXACT
22    FE_INVALID
23    FE_OVERFLOW
24    FE_UNDERFLOW
25    FE_ALL_EXCEPT
26    FE_DOWNWARD
27    FE_TONEAREST
28    FE_TOWARDZERO
29    FE_UPWARD
30    FE_DFL_ENV
31
32namespace std
33{
34
35Types:
36
37    fenv_t
38    fexcept_t
39
40int feclearexcept(int excepts);
41int fegetexceptflag(fexcept_t* flagp, int excepts);
42int feraiseexcept(int excepts);
43int fesetexceptflag(const fexcept_t* flagp, int excepts);
44int fetestexcept(int excepts);
45int fegetround();
46int fesetround(int round);
47int fegetenv(fenv_t* envp);
48int feholdexcept(fenv_t* envp);
49int fesetenv(const fenv_t* envp);
50int feupdateenv(const fenv_t* envp);
51
52}  // std
53*/
54
55#if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
56#  include <__cxx03/cfenv>
57#else
58#  include <__config>
59
60#  include <fenv.h>
61
62#  ifndef _LIBCPP_FENV_H
63#   error <cfenv> tried including <fenv.h> but didn't find libc++'s <fenv.h> header. \
64          This usually means that your header search paths are not configured properly. \
65          The header search paths should contain the C++ Standard Library headers before \
66          any C Standard Library, and you are probably using compiler flags that make that \
67          not be the case.
68#  endif
69
70#  if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
71#    pragma GCC system_header
72#  endif
73
74_LIBCPP_BEGIN_NAMESPACE_STD
75
76using ::fenv_t _LIBCPP_USING_IF_EXISTS;
77using ::fexcept_t _LIBCPP_USING_IF_EXISTS;
78
79using ::feclearexcept _LIBCPP_USING_IF_EXISTS;
80using ::fegetexceptflag _LIBCPP_USING_IF_EXISTS;
81using ::feraiseexcept _LIBCPP_USING_IF_EXISTS;
82using ::fesetexceptflag _LIBCPP_USING_IF_EXISTS;
83using ::fetestexcept _LIBCPP_USING_IF_EXISTS;
84using ::fegetround _LIBCPP_USING_IF_EXISTS;
85using ::fesetround _LIBCPP_USING_IF_EXISTS;
86using ::fegetenv _LIBCPP_USING_IF_EXISTS;
87using ::feholdexcept _LIBCPP_USING_IF_EXISTS;
88using ::fesetenv _LIBCPP_USING_IF_EXISTS;
89using ::feupdateenv _LIBCPP_USING_IF_EXISTS;
90
91_LIBCPP_END_NAMESPACE_STD
92
93#endif // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
94
95#endif // _LIBCPP_CFENV