bionic (3) fegetenv.3posix.gz

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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>


       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 .