Function priExtendPrime 

pub unsafe extern "C" fn priExtendPrime(
    p: *mut word,
    l: usize,
    q: *const word,
    n: usize,
    trials: usize,
    base_count: usize,
    rng: gen_i,
    rng_state: *mut c_void,
    stack: *mut c_void,
) -> bool_t