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>

COPYRIGHT

       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 .