Function faiss_Index_search 

pub unsafe extern "C" fn faiss_Index_search(
    index: *const FaissIndex,
    n: idx_t,
    x: *const f32,
    k: idx_t,
    distances: *mut f32,
    labels: *mut idx_t,
) -> c_int

query n vectors of dimension d to the index.

return at most k vectors. If there are not enough results for a query, the result array is padded with -1s.

@param index opaque pointer to index object @param x input vectors to search, size n * d @param labels output labels of the NNs, size nk @param distances output pairwise distances, size nk