Directory Class Reference

Public Member Functions
	Directory (int size)
	Directory::Directory Initialize a directory; initially, the directory is completely empty. If the disk is being formatted, an empty directory is all we need, but otherwise, we need to call FetchFrom in order to initialize it from disk. More...
	~Directory ()
	Directory::~Directory De-allocate directory data structure.
void	FetchFrom (OpenFile *file)
	Directory::FetchFrom Read the contents of the directory from disk. More...
void	WriteBack (OpenFile *file)
	Directory::WriteBack Write any modifications to the directory back to disk. More...
int	Find (const char *name)
	Directory::Find Look up file name in directory, and return the disk sector number where the file's header is stored. Return -1 if the name isn't in the directory. More...
bool	Add (const char *name, int newSector)
	Directory::Add Add a file into the directory. Return TRUE if successful;. More...
bool	Remove (const char *name)
	Directory::Remove Remove a file name from the directory. Return TRUE if successful;. More...
void	List ()
	Directory::List List all the file names in the directory.
void	Print ()
	Directory::Print List all the file names in the directory, their FileHeader locations, and the contents of each file. For debugging.
bool	isEmpty ()
	Directory::isEmpty Check if the folder is empty.

Constructor & Destructor Documentation

Directory::Directory

(

int

size

)

Directory::Directory Initialize a directory; initially, the directory is completely empty. If the disk is being formatted, an empty directory is all we need, but otherwise, we need to call FetchFrom in order to initialize it from disk.

Parameters

size	is the number of entries in the directory

Member Function Documentation

bool Directory::Add	(	const char *	name,
		int	newSector
	)

Directory::Add Add a file into the directory. Return TRUE if successful;.

Returns

return FALSE if the file name is already in the directory, or if the directory is completely full, and has no more space for additional file names.

Parameters

name	– the name of the file being added
newSector	– the disk sector containing the added file's header

void Directory::FetchFrom

(

OpenFile *

file

)

Directory::FetchFrom Read the contents of the directory from disk.

Parameters

file	– file containing the directory contents

int Directory::Find

(

const char *

name

)

Directory::Find Look up file name in directory, and return the disk sector number where the file's header is stored. Return -1 if the name isn't in the directory.

Parameters

name	– the file name to look up

bool Directory::Remove

(

const char *

name

)

Directory::Remove Remove a file name from the directory. Return TRUE if successful;.

Returns

FALSE if the file isn't in the directory.

Parameters

name	– the file name to be removed

void Directory::WriteBack

(

OpenFile *

file

)

Directory::WriteBack Write any modifications to the directory back to disk.

Parameters

file	– file to contain the new directory contents

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The documentation for this class was generated from the following files:

• code/filesys/directory.h
• code/filesys/directory.cc