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