int fegetenv (fenv_t* envp);
Get floating-point environment
Attempts to store the current state of the floating-point environment in the object pointed by envp.
The floating point environment is a set of status flags and control modes affecting floating-point calculations (including both floating-point exceptions and the rounding direction mode).
Programs calling this function shall ensure that pragma FENV_ACCESS is enabled for the call.
- Pointer to a fenv_t object where the state of the floating-point environment is stored.
Zero, if the state was successfully stored.
A non-zero value otherwise.
Each thread maintains a separate floating-point environment with its own state. Spawning a new thread copies the current state. [This applies to C11 and C++11 implementations]
No-throw guarantee: this function never throws exceptions.
- Hold floating-point exceptions (function
- Set floating-point environment (function