.\" Copyright (c) 2001-2003 The Open Group, All Rights Reserved 
.TH "FEGETROUND" 3P 2003 "IEEE/The Open Group" "POSIX Programmer's Manual"
.\" fegetround 
.SH 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.
.SH NAME
fegetround, fesetround \- get and set current rounding direction
.SH SYNOPSIS
.LP
\fB#include <fenv.h>
.br
.sp
int fegetround(void);
.br
int fesetround(int\fP \fIround\fP\fB);
.br
\fP
.SH DESCRIPTION
.LP
The \fIfegetround\fP() function shall get the current rounding direction.
.LP
The \fIfesetround\fP() function shall establish the rounding direction
represented by its argument \fIround\fP. If the
argument is not equal to the value of a rounding direction macro,
the rounding direction is not changed.
.SH RETURN VALUE
.LP
The \fIfegetround\fP() function shall return the value of the rounding
direction macro representing the current rounding
direction or a negative value if there is no such rounding direction
macro or the current rounding direction is not
determinable.
.LP
The \fIfesetround\fP() function shall return a zero value if and only
if the requested rounding direction was established.
.SH ERRORS
.LP
No errors are defined.
.LP
\fIThe following sections are informative.\fP
.SH EXAMPLES
.LP
The following example saves, sets, and restores the rounding direction,
reporting an error and aborting if setting the rounding
direction fails:
.sp
.RS
.nf

\fB#include <fenv.h>
#include <assert.h>
void f(int round_dir)
{
    #pragma STDC FENV_ACCESS ON
    int save_round;
    int setround_ok;
    save_round = fegetround();
    setround_ok = fesetround(round_dir);
    assert(setround_ok == 0);
    /* ... */
    fesetround(save_round);
    /* ... */
}
\fP
.fi
.RE
.SH APPLICATION USAGE
.LP
None.
.SH RATIONALE
.LP
None.
.SH FUTURE DIRECTIONS
.LP
None.
.SH SEE ALSO
.LP
The Base Definitions volume of IEEE\ Std\ 1003.1-2001, \fI<fenv.h>\fP
.SH 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 .