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FEHOLDEXCEPT(3P)           POSIX Programmer's Manual          FEHOLDEXCEPT(3P)



PROLOG
       This manual page is part of the POSIX Programmer's Manual.  The Linux implementation of this interface may dif-
       fer (consult the corresponding Linux manual page for details of Linux behavior), or the interface  may  not  be
       implemented on Linux.

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 pro-
       vides 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, Stan-
       dard  for Information Technology -- Portable Operating System Interface (POSIX), The Open Group Base Specifica-
       tions 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 Stan-
       dard, 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 .



IEEE/The Open Group                  2003                     FEHOLDEXCEPT(3P)