1// -*- C++ -*- 2//===---------------------------- math.h ----------------------------------===// 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/* 15 fenv.h synopsis 16 17This entire header is C99 / C++0X 18 19Macros: 20 21 FE_DIVBYZERO 22 FE_INEXACT 23 FE_INVALID 24 FE_OVERFLOW 25 FE_UNDERFLOW 26 FE_ALL_EXCEPT 27 FE_DOWNWARD 28 FE_TONEAREST 29 FE_TOWARDZERO 30 FE_UPWARD 31 FE_DFL_ENV 32 33Types: 34 35 fenv_t 36 fexcept_t 37 38int feclearexcept(int excepts); 39int fegetexceptflag(fexcept_t* flagp, int excepts); 40int feraiseexcept(int excepts); 41int fesetexceptflag(const fexcept_t* flagp, int excepts); 42int fetestexcept(int excepts); 43int fegetround(); 44int fesetround(int round); 45int fegetenv(fenv_t* envp); 46int feholdexcept(fenv_t* envp); 47int fesetenv(const fenv_t* envp); 48int feupdateenv(const fenv_t* envp); 49 50 51*/ 52 53#include <__config> 54 55#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 56#pragma GCC system_header 57#endif 58 59#include_next <fenv.h> 60 61#ifdef __cplusplus 62 63extern "C++" { 64 65#ifdef feclearexcept 66#undef feclearexcept 67#endif 68 69#ifdef fegetexceptflag 70#undef fegetexceptflag 71#endif 72 73 74#ifdef feraiseexcept 75#undef feraiseexcept 76#endif 77 78#ifdef fesetexceptflag 79#undef fesetexceptflag 80#endif 81 82 83#ifdef fetestexcept 84#undef fetestexcept 85#endif 86 87#ifdef fegetround 88#undef fegetround 89#endif 90 91#ifdef fesetround 92#undef fesetround 93#endif 94 95#ifdef fegetenv 96#undef fegetenv 97#endif 98 99#ifdef feholdexcept 100#undef feholdexcept 101#endif 102 103 104#ifdef fesetenv 105#undef fesetenv 106#endif 107 108#ifdef feupdateenv 109#undef feupdateenv 110#endif 111 112} // extern "C++" 113 114#endif // defined(__cplusplus) 115 116#endif // _LIBCPP_FENV_H 117