// Copyright (c) 2011-present, Facebook, Inc. All rights reserved. // This source code is licensed under both the GPLv2 (found in the // COPYING file in the root directory) and Apache 2.0 License // (found in the LICENSE.Apache file in the root directory). // #pragma once #include "rocksdb/merge_operator.h" #include <stdio.h> #include <memory> #include <string> namespace ROCKSDB_NAMESPACE { class MergeOperators { public: static std::shared_ptr<MergeOperator> CreatePutOperator(); static std::shared_ptr<MergeOperator> CreateDeprecatedPutOperator(); static std::shared_ptr<MergeOperator> CreateUInt64AddOperator(); static std::shared_ptr<MergeOperator> CreateStringAppendOperator(); static std::shared_ptr<MergeOperator> CreateStringAppendOperator(char delim_char); static std::shared_ptr<MergeOperator> CreateStringAppendOperator( const std::string& delim); static std::shared_ptr<MergeOperator> CreateStringAppendTESTOperator(); static std::shared_ptr<MergeOperator> CreateMaxOperator(); static std::shared_ptr<MergeOperator> CreateBytesXOROperator(); static std::shared_ptr<MergeOperator> CreateSortOperator(); // Will return a different merge operator depending on the string. static std::shared_ptr<MergeOperator> CreateFromStringId( const std::string& name); }; } // namespace ROCKSDB_NAMESPACE