The Open Group Base Specifications Issue 7, 2018 edition
IEEE Std 1003.1-2017 (Revision of IEEE Std 1003.1-2008)
Copyright © 2001-2018 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] [Option Start] 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. [Option End]

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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