Function ffi_string_owned_or_empty 

pub unsafe fn ffi_string_owned_or_empty<F, Free>(
    ffi_call: F,
    free_fn: Free,
) -> String
where
    F: FnOnce() -> *mut i8,
    Free: FnOnce(*mut i8),

Same as ffi_string_owned but returns an empty string on failure.

Safety

Same requirements as ffi_string_owned.