NAME
fegetexceptflag
fesetexceptflag — get and
set floating-point status flags
SYNOPSIS
#include
<fenv.h>
int fegetexceptflag(fexcept_t *flagp, int excepts); int fesetexceptflag(const fexcept_t *flagp, int excepts);
DESCRIPTION
[CX] 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 POSIX.1-2017 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.
RETURN VALUE
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.
ERRORS
No errors are defined.
EXAMPLES
None.
APPLICATION USAGE
None.
RATIONALE
None.
FUTURE DIRECTIONS
None.
SEE ALSO
feclearexcept(3), feraiseexcept(3), fetestexcept(3)
XBD <fenv.h>
CHANGE HISTORY
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.