FEGETENV(P) POSIX Programmer's Manual FEGETENV(P)
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 repre-
sented 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, fes-
etenv() shall return zero. Otherwise, it shall return a non-zero value.
No errors are defined.
The following sections are informative.
feholdexcept() , feupdateenv() , the Base Definitions volume of IEEE Std 1003.1-2001,
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 orig-
inal Standard can be obtained online at http://www.opengroup.org/unix/online.html .
IEEE/The Open Group 2003 FEGETENV(P)