text: //  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).
  //
  // Copyright (c) 2011 The LevelDB Authors. All rights reserved.
  // Use of this source code is governed by a BSD-style license that can be
  // found in the LICENSE file. See the AUTHORS file for names of contributors.
  
  #include "rocksdb/utilities/leveldb_options.h"
  #include "rocksdb/cache.h"
  #include "rocksdb/comparator.h"
  #include "rocksdb/env.h"
  #include "rocksdb/filter_policy.h"
  #include "rocksdb/options.h"
  #include "rocksdb/table.h"
  
  namespace rocksdb
  {
  LevelDBOptions::LevelDBOptions()
  	: comparator(BytewiseComparator()), create_if_missing(false),
  	  error_if_exists(false), paranoid_checks(false), env(Env::Default()),
  	  info_log(nullptr), write_buffer_size(4 << 20), max_open_files(1000),
  	  block_cache(nullptr), block_size(4096), block_restart_interval(16),
  	  compression(kSnappyCompression), filter_policy(nullptr)
  {
  }
  
  Options ConvertOptions(const LevelDBOptions &leveldb_options)
  {
  	Options options = Options();
  	options.create_if_missing = leveldb_options.create_if_missing;
  	options.error_if_exists = leveldb_options.error_if_exists;
  	options.paranoid_checks = leveldb_options.paranoid_checks;
  	options.env = leveldb_options.env;
  	options.info_log.reset(leveldb_options.info_log);
  	options.write_buffer_size = leveldb_options.write_buffer_size;
  	options.max_open_files = leveldb_options.max_open_files;
  	options.compression = leveldb_options.compression;
  
  	BlockBasedTableOptions table_options;
  	table_options.block_cache.reset(leveldb_options.block_cache);
  	table_options.block_size = leveldb_options.block_size;
  	table_options.block_restart_interval =
  		leveldb_options.block_restart_interval;
  	table_options.filter_policy.reset(leveldb_options.filter_policy);
  	options.table_factory.reset(NewBlockBasedTableFactory(table_options));
  
  	return options;
  }
  
  } // namespace rocksdb
  