FEHOLDEXCEPT(P)                                                                   FEHOLDEXCEPT(P)



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 imple-
       mentations which have the default non-stop mode and at least one other mode for trap  han-
       dling  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 orig-
       inal Standard can be obtained online at http://www.opengroup.org/unix/online.html .



POSIX                                          2003                               FEHOLDEXCEPT(P)