точечная среда (point environment)
Пролог (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.
Имя (Name)
fegetenv, fesetenv — get and set current floating-point
environment
Синопсис (Synopsis)
#include <fenv.h>
int fegetenv(fenv_t *envp);
int fesetenv(const fenv_t *envp);
Описание (Description)
The functionality described on this reference page is aligned
with the ISO C standard. Any conflict between the requirements
described here and the ISO C standard is unintentional. This
volume of POSIX.1‐2017 defers to the ISO C standard.
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.
Возвращаемое значение (Return value)
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.
Ошибки (Error)
No errors are defined.
The following sections are informative.
Примеры (Examples)
None.
Использование в приложениях (Application usage)
None.
Обоснование (Rationale)
None.
Будущие направления (Future directions)
None.
Смотри также (See also)
feholdexcept(3p), feupdateenv(3p)
The Base Definitions volume of POSIX.1‐2017, fenv.h(0p)
