fegetenv, fesetenv - get and set current floating-point environment
int fegetenv(fenv_t *envp);
int fesetenv(const fenv_t *envp);
[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.1-2017 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.
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.
No errors are defined.
First released in Issue 6. Derived from the ISO/IEC 9899:1999 standard.
ISO/IEC 9899:1999 standard, Technical Corrigendum 1 is incorporated.
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