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