FESETEXCEPTFLAG(3) Library Functions Manual FESETEXCEPTFLAG(3)

fegetexceptflag fesetexceptflag — get and set floating-point status flags

#include <fenv.h>

int fegetexceptflag(fexcept_t *flagp, int excepts);
int fesetexceptflag(const fexcept_t *flagp, int excepts);

The functionality described on this reference page is aligned with the ISO C standard. Any conflict between the requirements described here and the ISO C standard is unintentional. This volume of IEEE Std 1003.1-2001 (“POSIX.1”) defers to the ISO C standard.

The fegetexceptflag () function shall attempt to store an implementation-defined representation of the states of the floating-point status flags indicated by the argument excepts in the object pointed to by the argument flagp.

The fesetexceptflag () function shall attempt to set the floating-point status flags indicated by the argument excepts to the states stored in the object pointed to by flagp. The value pointed to by flagp shall have been set by a previous call to fegetexceptflag () whose second argument represented at least those floating-point exceptions represented by the argument excepts. This function does not raise floating-point exceptions, but only sets the state of the flags.

If the representation was successfully stored, fegetexceptflag () shall return zero. Otherwise, it shall return a non-zero value. If the excepts argument is zero or if all the specified exceptions were successfully set, fesetexceptflag () shall return zero. Otherwise, it shall return a non-zero value.

No errors are defined.

None.

None.

None.

None.

feclearexcept(3), feraiseexcept(3), fetestexcept(3), the Base Definitions volume of IEEE Std 1003.1-2001 (“POSIX.1”), <fenv.h>

First released in Issue 6. Derived from the ISO/IEC 9899:1999 (“ISO C99”) standard.

ISO/IEC 9899:1999 (“ISO C99”) standard, Technical Corrigendum 1 is incorporated.

footer end

December 6, 2001 posix.fail