PStore#load_data

# File tmp/rubies/ruby-3.0.5/lib/pstore.rb, line 401
def load_data(file, read_only)
  if read_only
    begin
      table = load(file)
      raise Error, "PStore file seems to be corrupted." unless table.is_a?(Hash)
    rescue EOFError
      # This seems to be a newly-created file.
      table = {}
    end
    table
  else
    data = file.read
    if data.empty?
      # This seems to be a newly-created file.
      table = {}
      checksum = empty_marshal_checksum
      size = empty_marshal_data.bytesize
    else
      table = load(data)
      checksum = CHECKSUM_ALGO.digest(data)
      size = data.bytesize
      raise Error, "PStore file seems to be corrupted." unless table.is_a?(Hash)
    end
    data.replace(EMPTY_STRING)
    [table, checksum, size]
  end
end