fesettrapenable(3M)

DESCRIPTION

The fesettrapenable() function enables the exception traps indicated by the argument excepts and disables the exception traps not indicated by the argument. The argument can be constructed as a bitwise OR of the exception macros: FE_INEXACT, FE_DIVBYZERO, FE_UNDERFLOW, FE_OVERFLOW, and FE_INVALID. FE_ALL_EXCEPT represents all the exceptions.

USAGE

To use this function, compile either with the default -Ae option or with the -Aa and -D_HPUX_SOURCE options. Make sure your program includes <fenv.h>.

For HP Integrity servers, specify +Ofenvaccess on the compiler command line or place the call to this function under the effect of an affirmative FENV_ACCESS pragma:

If the FENV_ACCESS pragma is placed outside of any top-level declarations in a file, the pragma will apply to all declarations in the compilation following the pragma until another FENV_ACCESS pragma is encountered or until the end of the file is reached.

If the FENV_ACCESS pragma is placed at the beginning of a block (compound statement), the pragma will apply until another FENV_ACCESS pragma is encountered or until the end of the block is reached.

For PA-RISC, you might need to use the +Onomoveflops compiler option in order to prevent optimizations that can undermine the specified behavior of this function.

Link in the math library by specifying -lm on the compiler or linker command line.

For more information, see the HP-UX floating-point guide for HP Integrity servers at the following site: http://www.hp.com/go/fp.

RETURN VALUE

None.

ERRORS

No errors are defined.

EXAMPLES

Enable overflow and divide by zero traps and disable the others

AUTHOR

fesettrapenable() was developed by HP and is not required by any current standard.

SEE ALSO

feclearexcept(3M), fegetexceptflag(3M), fegettrapenable(3M), feraiseexcept(3M), fesetexceptflag(3M), fetestexcept(3M), fenv(5).