trusty (3) feholdexcept.3posix.gz

Provided by: manpages-posix-dev_2.16-1_all bug

NAME
       feholdexcept - save current floating-point environment


SYNOPSIS
       #include <fenv.h>

       int feholdexcept(fenv_t *envp);


DESCRIPTION
       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.

       The following sections are informative.


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() , fesetenv() , feupdateenv() , the Base Definitions volume of IEEE Std 1003.1-2001, <fenv.h>


       Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1, 2003 Edition,
       Standard  for  Information Technology -- Portable Operating System Interface (POSIX), The Open Group Base
       Specifications Issue 6, Copyright (C) 2001-2003 by the Institute of Electrical and Electronics Engineers,
       Inc  and  The  Open Group. In the event of any discrepancy between this version and the original IEEE and
       The Open Group Standard, the original IEEE and The Open Group  Standard  is  the  referee  document.  The
       original Standard can be obtained online at http://www.opengroup.org/unix/online.html .