code: def parse(db_folder, out_folder):
      
      # The database structure, containing table and column definitions as
      # well as other data.
      stru_dat = get_file(db_folder, 'CroStru.dat')
      # Index file for the database, which contains offsets for each record.
      data_tad = get_file(db_folder, 'CroBank.tad')
      # Actual data records, can only be decoded using CroBank.tad.
      data_dat = get_file(db_folder, 'CroBank.dat')
      if None in [stru_dat, data_tad, data_dat]:
          raise CronosException("Not all database files are present.")
  
      meta, tables = parse_structure(stru_dat)
  
      for table in tables:
          # TODO: do we want to export the "FL" table?
          if table['abbr'] == 'FL' and table['name'] == 'Files':
              continue
          fh = open(make_csv_file_name(meta, table, out_folder), 'w')
          columns = table.get('columns')
          writer = csv.writer(fh)
          writer.writerow([encode_cell(c['name']) for c in columns])
          for row in parse_data(data_tad, data_dat, table.get('id'), columns):
              writer.writerow([encode_cell(c) for c in row])
          fh.close()
docs: Parse a cronos database.
  
      Convert the database located in ``db_folder`` into CSV files in the
      directory ``out_folder``.