Originální popis anglicky:
fegetenv, fesetenv - get and set current floating-point environment
Návod, kniha: POSIX Programmer's Manual
#include <fenv.h>
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
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 value.
No errors are defined.
The following sections are informative.
None.
None.
None.
None.
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 http://www.opengroup.org/unix/online.html
.
