fenv.h

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#ifndef _INC_FENV
#define _INC_FENV
 
#include <float.h>
 
#define FE_TONEAREST   _RC_NEAR
#define FE_UPWARD      _RC_UP
#define FE_DOWNWARD    _RC_DOWN
#define FE_TOWARDZERO  _RC_CHOP
 
#define FE_INEXACT     _SW_INEXACT
#define FE_UNDERFLOW   _SW_UNDERFLOW
#define FE_OVERFLOW    _SW_OVERFLOW
#define FE_DIVBYZERO   _SW_ZERODIVIDE
#define FE_INVALID     _SW_INVALID
#define FE_ALL_EXCEPT  (FE_DIVBYZERO | FE_INEXACT | FE_INVALID | FE_OVERFLOW | FE_UNDERFLOW)
 
#ifdef __cplusplus
extern "C" {
#endif
 
typedef struct
{
    __msvcrt_ulong _Fe_ctl;
    __msvcrt_ulong _Fe_stat;
} fenv_t;
 
typedef __msvcrt_ulong fexcept_t;
 
_ACRTIMP int __cdecl fegetenv(fenv_t*);
_ACRTIMP int __cdecl fesetenv(const fenv_t*);
_ACRTIMP int __cdecl fegetexceptflag(fexcept_t*, int);
_ACRTIMP int __cdecl fegetround(void);
_ACRTIMP int __cdecl feholdexcept(fenv_t*);
_ACRTIMP int __cdecl fesetround(int);
_ACRTIMP int __cdecl fesetexceptflag(const fexcept_t*, int);
_ACRTIMP int __cdecl feclearexcept(int);
_ACRTIMP int __cdecl fetestexcept(int);
 
#ifdef __cplusplus
}
#endif
 
#endif /* _INC_FENV */