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 (consult the corresponding
Linux manual page for details of Linux behavior), or the interface may
not be implemented on Linux.
fegetenv, fesetenv - get and set current floating-point environment
int fegetenv(fenv_t *envp);
int fesetenv(const fenv_t *envp);
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 feholdex‐
cept(), 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
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.
No errors are defined.
The following sections are informative.
SEE ALSOfeholdexcept(), feupdateenv(), the Base Definitions volume of
IEEE Std 1003.1-2001, <fenv.h>
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 .
IEEE/The Open Group 2003 FEGETENV(3P)