| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| |
| #ifndef THETA_A_NOT_B_HPP_ |
| #define THETA_A_NOT_B_HPP_ |
| |
| #include <memory> |
| #include <functional> |
| #include <climits> |
| |
| #include "theta_sketch.hpp" |
| #include "common_defs.hpp" |
| |
| namespace datasketches { |
| |
| /* |
| * author Alexander Saydakov |
| * author Lee Rhodes |
| * author Kevin Lang |
| */ |
| |
| template<typename A> |
| class theta_a_not_b_alloc { |
| public: |
| /** |
| * Creates an instance of the a-not-b operation (set difference) with a given has seed. |
| * @param seed hash seed |
| */ |
| explicit theta_a_not_b_alloc(uint64_t seed = DEFAULT_SEED); |
| |
| /** |
| * Computes the a-not-b set operation given two sketches. |
| * @return the result of a-not-b |
| */ |
| compact_theta_sketch_alloc<A> compute(const theta_sketch_alloc<A>& a, const theta_sketch_alloc<A>& b, bool ordered = true) const; |
| |
| private: |
| typedef typename std::allocator_traits<A>::template rebind_alloc<uint64_t> AllocU64; |
| uint16_t seed_hash_; |
| |
| }; |
| |
| // alias with default allocator for convenience |
| typedef theta_a_not_b_alloc<std::allocator<void>> theta_a_not_b; |
| |
| } /* namespace datasketches */ |
| |
| #include "theta_a_not_b_impl.hpp" |
| |
| # endif |