index_comparator.hpp

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// Copyright (c) 2021 MIT Digital Currency Initiative,
//                    Federal Reserve Bank of Boston
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
#ifndef OPENCBDC_TX_SRC_RAFT_INDEX_COMPARATOR_H_
#define OPENCBDC_TX_SRC_RAFT_INDEX_COMPARATOR_H_
 
#include <leveldb/comparator.h>
 
namespace cbdc::raft {
    class index_comparator : public leveldb::Comparator {
      public:
        [[nodiscard]] auto Compare(const leveldb::Slice& a,
                                   const leveldb::Slice& b) const
            -> int override;
 
        [[nodiscard]] auto Name() const -> const char* override;
 
        void FindShortestSeparator(
            std::string* /* start */,
            const leveldb::Slice& /* limit */) const override;
 
        void FindShortSuccessor(std::string* /* key */) const override;
    };
}
 
#endif // OPENCBDC_TX_SRC_RAFT_INDEX_COMPARATOR_H_