fs

type Dir interface {
	// Delete the directory.
	DeleteDirectory() error
	// Rename the directory.
	RenameDirectory(newName string) error
	// Get all lists of files or children's directories in the directory.
	ReadDirectory() (list.List, error)
	// Set directory permission.
	SetDirectoryPermission(permission Mode) error
}

type File interface {
	// Append mode, which adds new data to the end of a file.
	AppendWriteFile(buffer []byte) error
	// Vector Append mode, which supports appending consecutive buffers to the end of the file.
	AppendWritevFile(iov *[][]byte) error
	// Delete the file.
	DeleteFile() error
	// Reading a specified location of file.
	ReadFile(offset int, buffer []byte) error
	// Reading contiguous regions of a file and dispersing them into discontinuous buffers.
	ReadvFile(iov *[][]byte) error
	// Read the entire file using streaming read
	StreamReadFile(offset int, buffer []byte) (*Iter, error)
	// Rename the file.
	RenameFile(newName string) error
	// Get the file written data's size and return an error if the file does not exist. The unit of file size is Byte.
	GetFileSize() (int, error)
	// Set directory permission.
	SetFilePermission(permission Mode) error
}

type FileSystem interface {
	// Create the directory by specified name and mode.
	CreateDirectory(name string, permission Mode) error
	// Open the directory by specified name.
	OpenDirectory(name string) (*Dir, error)
	// Create the file by specified name and mode.
	CreateFile(name string, permission Mode) error
	// Open the file by specified name.
	OpenFile(name string) (*File, error)
	// Flush mode, which flushes all data to one file.
	FlushWriteFile(buffer []byte, permission Mode) (*File, error)
}

type Iter struct{}

type Mode struct{}