rossi.fstools.fs.fatfs
Class FatTable

java.lang.Object
  rossi.fstools.fs.fatfs.FatTable

public class FatTable

extends java.lang.Object

Class to lookup cluster pointers in the FAT table.

Constructor Summary

FatTable(FatSuperBlock sb, BlockReader br)
Create a new FatTable object for managing access to the FAT.

Method Summary

boolean	isBad(int cluster) Return true if the given cluster number is bad.
boolean	isEOF(int cluster) Return true if the given cluster number is an EOF marker.
boolean	isFree(int cluster) Return true if the given cluster number is free (unallocated).
int	lookup(int cluster) Lookup the value for the given cluster in the FAT table.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

FatTable

public FatTable(FatSuperBlock sb,
                BlockReader br)

Create a new FatTable object for managing access to the FAT.

Parameters:

sb - a FatSuperBlock for this filesystem

br - a BlockReader initialized to read in sb.getSectorSize() blocks.

Method Detail

isEOF

public boolean isEOF(int cluster)

Return true if the given cluster number is an EOF marker.

Parameters:

cluster - number

Returns:

true if end of file mark.

isBad

public boolean isBad(int cluster)

Return true if the given cluster number is bad.

Parameters:

cluster - number

Returns:

true if marked bad.

isFree

public boolean isFree(int cluster)

Return true if the given cluster number is free (unallocated).

Parameters:

cluster - number

Returns:

true if free

lookup

public int lookup(int cluster)
           throws FsException,
                  java.io.IOException

Lookup the value for the given cluster in the FAT table.

Parameters:

cluster - a int

Returns:

value contained in the FAT for the given cluster.

Throws:

FsException

java.io.IOException - if an IO exception occurs.