PROLOG | NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | ERRORS | EXAMPLES | APPLICATION USAGE | RATIONALE | FUTURE DIRECTIONS | SEE ALSO | COPYRIGHT

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

PROLOG         top

       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         top

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

SYNOPSIS         top

       #include <fenv.h>

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

DESCRIPTION         top

       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         top

       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         top

       No errors are defined.

       The following sections are informative.

EXAMPLES         top

       None.

APPLICATION USAGE         top

       None.

RATIONALE         top

       None.

FUTURE DIRECTIONS         top

       None.

SEE ALSO         top

       feholdexcept(3p), feupdateenv(3p)

       The Base Definitions volume of POSIX.1‐2008, fenv.h(0p)

COPYRIGHT         top

       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(3P)