fegetexceptflag

fegetexceptflag

Extract floating point exception flags

Portability: C99

SYNOPSIS
DESCRIPTION
RETURN VALUE
CAUTIONS
RELATED FUNCTIONS
SEE ALSO

SYNOPSIS

   #include <fenv.h>

   void fegetexceptflag(fexcept_t *flags, int excepts);

DESCRIPTION

fegetexceptflag is used to extract the exception flag settings in the current floating-point environment. The flags argument points to the location where the flags should be stored; the excepts argument is the sum of one or more floating-point exception names indicating which flags are to be extracted.

For SAS/C, the flags pointer addresses a character which contains the sum of the requested flags which were set in the current environment. If you depend on this format, it will make your program non-portable.

RETURN VALUE

fegetexceptflag has no return value.

CAUTIONS

fegetexceptflag has no effect when called from a function whose default floating-point format is hexadecimal, that is, one compiled without the bfp option.

A program which calls fegetexceptflag must use the standard FENV_ACCESS pragma in an enclosing scope, or the effects are unpredictable.

RELATED FUNCTIONS

feclearexcept, feraiseexcept, fesetexceptflag, fetestexcept

SEE ALSO

"Mathematical Functions" in Chapter 2, "Function Categories"

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