NAME
feholdexcept —
save current floating-point environment
SYNOPSIS
#include
<fenv.h>
int feholdexcept(fenv_t *envp);
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 IEEE Std 1003.1-2001 (“POSIX.1”) defers to the ISO C standard.
The feholdexcept () function
shall save the current floating-point environment in the object pointed to
by envp, clear the
floating-point status flags, and then install a non-stop (continue on
floating-point exceptions) mode, if available, for all floating-point
exceptions.
RETURN VALUE
The feholdexcept () function shall return
zero if and only if non-stop floating-point exception handling was
successfully installed.
ERRORS
No errors are defined.
EXAMPLES
None.
APPLICATION USAGE
None.
RATIONALE
The feholdexcept () function should be
effective on typical IEC 60559:1989 standard implementations which have the
default non-stop mode and at least one other mode for trap handling or
aborting. If the implementation provides only the non-stop mode, then
installing the non-stop mode is trivial.
FUTURE DIRECTIONS
None.
SEE ALSO
fegetenv(3) , fesetenv(3) , feupdateenv(3) , the Base Definitions volume of IEEE Std 1003.1-2001 (“POSIX.1”), <fenv.h>
CHANGE HISTORY
First released in Issue 6. Derived from the ISO/IEC 9899:1999 (“ISO C99”) standard.
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