| /* |
| * 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 REQ_QUANTILE_CALCULATOR_HPP_ |
| #define REQ_QUANTILE_CALCULATOR_HPP_ |
| |
| #include <functional> |
| |
| namespace datasketches { |
| |
| template< |
| typename T, |
| typename Comparator, |
| typename Allocator |
| > |
| class req_quantile_calculator { |
| public: |
| req_quantile_calculator(uint64_t n, const Allocator& allocator); |
| |
| void add(const T* begin, const T* end, uint8_t lg_weight); |
| |
| template<bool inclusive> |
| void convert_to_cummulative(); |
| |
| const T* get_quantile(double rank) const; |
| |
| private: |
| using Entry = std::pair<const T*, uint64_t>; |
| using AllocEntry = typename std::allocator_traits<Allocator>::template rebind_alloc<Entry>; |
| using Container = std::vector<Entry, AllocEntry>; |
| |
| template<typename C> |
| struct compare_pairs_by_first_ptr { |
| bool operator()(const Entry& a, const Entry& b) { |
| return C()(*a.first, *b.first); |
| } |
| }; |
| |
| struct compare_pairs_by_second { |
| bool operator()(const Entry& a, const Entry& b) { |
| return a.second < b.second; |
| } |
| }; |
| |
| uint64_t n_; |
| Container entries_; |
| }; |
| |
| } /* namespace datasketches */ |
| |
| #include "req_quantile_calculator_impl.hpp" |
| |
| #endif |