Function gr_poly_shiftless_decomposition_factor 

pub unsafe extern "C" fn gr_poly_shiftless_decomposition_factor(
    c: gr_ptr,
    slfac: *mut gr_vec_struct,
    slshifts: *mut gr_vec_struct,
    slmult: *mut gr_vec_struct,
    pol: *const gr_poly_struct,
    ctx: *mut gr_ctx_struct,
) -> c_int