The Open Group Base Specifications Issue 7
IEEE Std 1003.1-2008, 2016 Edition
Copyright © 2001-2016 The IEEE and The Open Group

#### NAME

> fegetenv, fesetenv - get and set current floating-point environment

#### SYNOPSIS

> ``#include <fenv.h>
> int fegetenv(fenv_t *`envp`);
> int fesetenv(const fenv_t *`envp`);
> ``

#### DESCRIPTION

> [CX] 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.1-2008 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.

#### 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.

#### ERRORS

> No errors are defined.

The following sections are informative.

#### EXAMPLES

> None.

#### APPLICATION USAGE

> None.

#### RATIONALE

> None.

#### FUTURE DIRECTIONS

> None.

#### SEE ALSO

> feholdexcept, feupdateenv

> XBD <fenv.h>

#### CHANGE HISTORY

> First released in Issue 6. Derived from the ISO/IEC 9899:1999 standard.

> ISO/IEC 9899:1999 standard, Technical Corrigendum 1 is incorporated.

End of informative text.

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