| /* |
| * 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 CPC_COMMON_HPP_ |
| #define CPC_COMMON_HPP_ |
| |
| #include <memory> |
| |
| #include "MurmurHash3.h" |
| |
| namespace datasketches { |
| |
| static const uint8_t CPC_MIN_LG_K = 4; |
| static const uint8_t CPC_MAX_LG_K = 26; |
| static const uint8_t CPC_DEFAULT_LG_K = 11; |
| |
| template<typename A> using AllocU8 = typename std::allocator_traits<A>::template rebind_alloc<uint8_t>; |
| template<typename A> using AllocU16 = typename std::allocator_traits<A>::template rebind_alloc<uint16_t>; |
| template<typename A> using AllocU32 = typename std::allocator_traits<A>::template rebind_alloc<uint32_t>; |
| template<typename A> using AllocU64 = typename std::allocator_traits<A>::template rebind_alloc<uint64_t>; |
| |
| template<typename A> using vector_u8 = std::vector<uint8_t, AllocU8<A>>; |
| template<typename A> using vector_u32 = std::vector<uint32_t, AllocU32<A>>; |
| template<typename A> using vector_u64 = std::vector<uint64_t, AllocU64<A>>; |
| |
| // forward declaration |
| template<typename A> class u32_table; |
| |
| template<typename A> |
| struct compressed_state { |
| vector_u32<A> table_data; |
| uint32_t table_data_words; |
| uint32_t table_num_entries; // can be different from the number of entries in the sketch in hybrid mode |
| vector_u32<A> window_data; |
| uint32_t window_data_words; |
| }; |
| |
| template<typename A> |
| struct uncompressed_state { |
| u32_table<A> table; |
| vector_u8<A> window; |
| }; |
| |
| } /* namespace datasketches */ |
| |
| #endif |