libcxx/include/fenv.h

   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 /*
  15     fenv.h synopsis
  16
  17 This entire header is C99 / C++0X
  18
  19 Macros:
  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
  33 Types:
  34
  35     fenv_t
  36     fexcept_t
  37
  38 int feclearexcept(int excepts);
  39 int fegetexceptflag(fexcept_t* flagp, int excepts);
  40 int feraiseexcept(int excepts);
  41 int fesetexceptflag(const fexcept_t* flagp, int excepts);
  42 int fetestexcept(int excepts);
  43 int fegetround();
  44 int fesetround(int round);
  45 int fegetenv(fenv_t* envp);
  46 int feholdexcept(fenv_t* envp);
  47 int fesetenv(const fenv_t* envp);
  48 int 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 #if __has_include_next(<fenv.h>)
  60 #  include_next <fenv.h>
  61 #endif
  62
  63 #ifdef __cplusplus
  64
  65 extern "C++" {
  66
  67 #ifdef feclearexcept
  68 #undef feclearexcept
  69 #endif
  70
  71 #ifdef fegetexceptflag
  72 #undef fegetexceptflag
  73 #endif
  74
  75
  76 #ifdef feraiseexcept
  77 #undef feraiseexcept
  78 #endif
  79
  80 #ifdef fesetexceptflag
  81 #undef fesetexceptflag
  82 #endif
  83
  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
 106 #ifdef fesetenv
 107 #undef fesetenv
 108 #endif
 109
 110 #ifdef feupdateenv
 111 #undef feupdateenv
 112 #endif
 113
 114 } // extern "C++"
 115
 116 #endif // defined(__cplusplus)
 117
 118 #endif // _LIBCPP_FENV_H