fegetenv(3M)

DESCRIPTION

The fegetenv() function stores the current floating-point environment in the object pointed to by the argument envp.

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 IA-64, 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.

RETURN VALUE

None.

ERRORS

No errors are defined.

EXAMPLE

Store the current floating-point environment:

SEE ALSO

feholdexcept(3M), fesetenv(3M), feupdateenv(3M), fenv(5).

STANDARDS CONFORMANCE

fegetenv() : ISO/IEC C99 (including Annex F, "IEC 60559 floating-point arithmetic")