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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 functionality described on this reference page is aligned with  the
       ISO C  standard.  Any  conflict between the requirements described here
       and the ISO C standard is unintentional. This  volume  of  POSIX.1-2008
       defers to the ISO C standard.
       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(), feupdateenv()
       The Base Definitions volume of POSIX.1-2008, <fenv.h>
COPYRIGHT
       Portions  of  this text are reprinted and reproduced in electronic form
       from IEEE Std 1003.1, 2013 Edition, Standard for Information Technology
       --  Portable  Operating  System  Interface (POSIX), The Open Group Base
       Specifications Issue 7, Copyright (C) 2013 by the Institute of Electri-
       cal  and  Electronics  Engineers,  Inc  and  The  Open Group.  (This is
       POSIX.1-2008 with the 2013 Technical Corrigendum  1  applied.)  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.unix.org/online.html .
       Any typographical or formatting errors that appear  in  this  page  are
       most likely to have been introduced during the conversion of the source
       files to man page format. To report such errors,  see  https://www.ker-
       nel.org/doc/man-pages/reporting_bugs.html .
IEEE/The Open Group                  2013                     FEHOLDEXCEPT(3P)