Gets and sets the current floating-point environment.
#include <fenv.h> int fegetenv (envp) fenv_t *envp; int fesetenv (envp) const fenv_t *envp;
The fegetenv subroutine stores the current floating-point environment in the object pointed to by the envp parameter.
The fesetenv subroutine attempts to establish the floating-point environment represented by the object pointed to by the envp parameter. The envp parameter points to an object set by a call to the fegetenv or feholdexcept subroutines, or equal a floating-point environment macro. The fesetenv subroutine does not raise floating-point exceptions. It only installs the state of the floating-point status flags represented through its argument.
| envp | Points to an object set by a call to the fegetenv or feholdexcept subroutines, or equal a floating-point environment macro. |
If the representation was successfully stored, the fegetenv subroutine returns zero. Otherwise, it returns a nonzero value. If the environment was successfully established, the fesetenv subroutine returns zero. Otherwise, it returns a nonzero value.
feholdexcept Subroutine and feupdateenv Subroutine