func readData (ofLength : Int) -> DataReads data synchronously up to the specified number of bytes.
var offsetInFile : UInt64The position of the file pointer within the file represented by the file handle.
func seekToEndOfFile () -> UInt64Places the file pointer at the end of the file referenced by the file handle and returns the new file offset.
func seek(toFileOffset : UInt64)Moves the file pointer to the specified offset within the file represented by the receiver.
ファイルポインタをレシーバによって表されるファイル内部の指定されたオフセットに移動します。
func closeFile ()Disallows further access to the represented file or communications channel and signals end of file on communications channels that permit writing.
表現されたファイルまたは通信経路へのもっと先のアクセスを禁止します、そして書き込み許可する通信経路上のファイルの終端を合図します。
func synchronizeFile ()Causes all in-memory data and attributes of the file represented by the handle to write to permanent storage.
func truncateFile (atOffset : UInt64)Truncates or extends the file represented by the file handle to a specified offset within the file and puts the file pointer at that position.