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_FENV_H
11#define _LIBCPP_FENV_H
12
13/*
14 fenv.h 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
32Types:
33
34 fenv_t
35 fexcept_t
36
37int feclearexcept(int excepts);
38int fegetexceptflag(fexcept_t* flagp, int excepts);
39int feraiseexcept(int excepts);
40int fesetexceptflag(const fexcept_t* flagp, int excepts);
41int fetestexcept(int excepts);
42int fegetround();
43int fesetround(int round);
44int fegetenv(fenv_t* envp);
45int feholdexcept(fenv_t* envp);
46int fesetenv(const fenv_t* envp);
47int feupdateenv(const fenv_t* envp);
48
49
50*/
51
52#if defined(__cplusplus) && __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
53# include <__cxx03/fenv.h>
54#else
55# include <__config>
56
57# if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
58# pragma GCC system_header
59# endif
60
61# if __has_include_next(<fenv.h>)
62# include_next <fenv.h>
63# endif
64
65# ifdef __cplusplus
66
67extern "C++" {
68
69# ifdef feclearexcept
70# undef feclearexcept
71# endif
72
73# ifdef fegetexceptflag
74# undef fegetexceptflag
75# endif
76
77# ifdef feraiseexcept
78# undef feraiseexcept
79# endif
80
81# ifdef fesetexceptflag
82# undef fesetexceptflag
83# endif
84
85# ifdef fetestexcept
86# undef fetestexcept
87# endif
88
89# ifdef fegetround
90# undef fegetround
91# endif
92
93# ifdef fesetround
94# undef fesetround
95# endif
96
97# ifdef fegetenv
98# undef fegetenv
99# endif
100
101# ifdef feholdexcept
102# undef feholdexcept
103# endif
104
105# ifdef fesetenv
106# undef fesetenv
107# endif
108
109# ifdef feupdateenv
110# undef feupdateenv
111# endif
112
113} // extern "C++"
114
115# endif // defined(__cplusplus)
116#endif // defined(__cplusplus) && __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
117
118#endif // _LIBCPP_FENV_H
119