Function bsearch 

#[unsafe(no_mangle)]
pub unsafe extern "C" fn bsearch(
    key: *const c_void,
    base: *const c_void,
    nmemb: usize,
    size: usize,
    compar: unsafe extern "C" fn(*const c_void, *const c_void) -> c_int,
) -> *mut c_void