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
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.
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
No errors are defined.
The following sections are informative.
feholdexcept() , 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