fenv.h 1.9 KB

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  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. #ifndef _LIBCPP_FENV_H
  10. #define _LIBCPP_FENV_H
  11. /*
  12. fenv.h synopsis
  13. This entire header is C99 / C++0X
  14. Macros:
  15. FE_DIVBYZERO
  16. FE_INEXACT
  17. FE_INVALID
  18. FE_OVERFLOW
  19. FE_UNDERFLOW
  20. FE_ALL_EXCEPT
  21. FE_DOWNWARD
  22. FE_TONEAREST
  23. FE_TOWARDZERO
  24. FE_UPWARD
  25. FE_DFL_ENV
  26. Types:
  27. fenv_t
  28. fexcept_t
  29. int feclearexcept(int excepts);
  30. int fegetexceptflag(fexcept_t* flagp, int excepts);
  31. int feraiseexcept(int excepts);
  32. int fesetexceptflag(const fexcept_t* flagp, int excepts);
  33. int fetestexcept(int excepts);
  34. int fegetround();
  35. int fesetround(int round);
  36. int fegetenv(fenv_t* envp);
  37. int feholdexcept(fenv_t* envp);
  38. int fesetenv(const fenv_t* envp);
  39. int feupdateenv(const fenv_t* envp);
  40. */
  41. #include <__config>
  42. #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
  43. # pragma GCC system_header
  44. #endif
  45. #if __has_include_next(<fenv.h>)
  46. # include_next <fenv.h>
  47. #endif
  48. #ifdef __cplusplus
  49. extern "C++" {
  50. # ifdef feclearexcept
  51. # undef feclearexcept
  52. # endif
  53. # ifdef fegetexceptflag
  54. # undef fegetexceptflag
  55. # endif
  56. # ifdef feraiseexcept
  57. # undef feraiseexcept
  58. # endif
  59. # ifdef fesetexceptflag
  60. # undef fesetexceptflag
  61. # endif
  62. # ifdef fetestexcept
  63. # undef fetestexcept
  64. # endif
  65. # ifdef fegetround
  66. # undef fegetround
  67. # endif
  68. # ifdef fesetround
  69. # undef fesetround
  70. # endif
  71. # ifdef fegetenv
  72. # undef fegetenv
  73. # endif
  74. # ifdef feholdexcept
  75. # undef feholdexcept
  76. # endif
  77. # ifdef fesetenv
  78. # undef fesetenv
  79. # endif
  80. # ifdef feupdateenv
  81. # undef feupdateenv
  82. # endif
  83. } // extern "C++"
  84. #endif // defined(__cplusplus)
  85. #endif // _LIBCPP_FENV_H