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

       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  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  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 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 Electrical 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.kernel.org/doc/man-pages/reporting_bugs.html .

IEEE/The Open Group                                   2013                                      FEGETENV(3POSIX)