feholdexcept(3p) - phpMan

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
       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 .



POSIX                                2003                      FEHOLDEXCEPT(P)

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