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



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

NAME
       fegetenv, fesetenv - get and set current floating-point environment

SYNOPSIS
       #include <fenv.h>

       int fegetenv(fenv_t *envp);
       int fesetenv(const fenv_t *envp);


DESCRIPTION
       The fegetenv() function shall attempt to store the current floating-point environment in the object pointed to by envp.

       The fesetenv() function shall attempt to establish the floating-point environment represented by the object pointed to by
       envp. The argument envp shall point to an object set by a call to fegetenv() or feholdexcept(), or equal a floating-point
       environment  macro.  The fesetenv() function does not raise floating-point exceptions, but only installs the state of the
       floating-point status flags represented through its argument.

RETURN VALUE
       If the representation was successfully stored, fegetenv() shall return zero. Otherwise, it shall return a non-zero value.
       If  the  environment  was  successfully  established, fesetenv() shall return zero. Otherwise, it shall return a non-zero
       value.

ERRORS
       No errors are defined.

       The following sections are informative.

EXAMPLES
       None.

APPLICATION USAGE
       None.

RATIONALE
       None.

FUTURE DIRECTIONS
       None.

SEE ALSO
       feholdexcept(), 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, Copy-
       right (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.open-
       group.org/unix/online.html .



IEEE/The Open Group                                           2003                                                  FEGETENV(3P)