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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 differ (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 envi-
       ronment in the object pointed to by envp, clear the floating-point sta-
       tus 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 .

IEEE/The Open Group                  2003                     FEHOLDEXCEPT(3P)