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RocksDB for Erlang

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rocksdb deps rocksdb utilities blob_db blob_dump_tool.h
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deps/rocksdb/utilities/blob_db/blob_dump_tool.h 

//  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

#ifndef ROCKSDB_LITE



#include <memory>

#include <string>

#include <utility>

#include "rocksdb/slice.h"

#include "rocksdb/status.h"

#include "util/file_reader_writer.h"

#include "utilities/blob_db/blob_log_format.h"



namespace rocksdb {

namespace blob_db {



class BlobDumpTool {

 public:

  enum class DisplayType {

    kNone,

    kRaw,

    kHex,

    kDetail,

  };



  BlobDumpTool();



  Status Run(const std::string& filename, DisplayType show_key,

             DisplayType show_blob, DisplayType show_uncompressed_blob,

             bool show_summary);



 private:

  std::unique_ptr<RandomAccessFileReader> reader_;

  std::unique_ptr<char[]> buffer_;

  size_t buffer_size_;



  Status Read(uint64_t offset, size_t size, Slice* result);

  Status DumpBlobLogHeader(uint64_t* offset, CompressionType* compression);

  Status DumpBlobLogFooter(uint64_t file_size, uint64_t* footer_offset);

  Status DumpRecord(DisplayType show_key, DisplayType show_blob,

                    DisplayType show_uncompressed_blob, bool show_summary,

                    CompressionType compression, uint64_t* offset,

                    uint64_t* total_records, uint64_t* total_key_size,

                    uint64_t* total_blob_size,

                    uint64_t* total_uncompressed_blob_size);

  void DumpSlice(const Slice s, DisplayType type);



  template <class T>

  std::string GetString(std::pair<T, T> p);

};



}  // namespace blob_db

}  // namespace rocksdb



#endif  // ROCKSDB_LITE