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Class LZWDecoder

public class LZWDecoder extends Object

A class for performing LZW decoding.

Field Summary
int[]	andTable
int	bitPointer
int	bitsToGet
int	bytePointer
byte[]	data
int	nextBits
int	nextData
byte[][]	stringTable
int	tableIndex
OutputStream	uncompData

Constructor Summary
	LZWDecoder()

Method Summary
void	addStringToTable(byte[] oldString, byte newString) Add a new string to the string table.
void	addStringToTable(byte[] string) Add a new string to the string table.
byte[]	composeString(byte[] oldString, byte newString) Append `newString` to the end of `oldString`.
void	decode(byte[] data, OutputStream uncompData) Method to decode LZW compressed data.
int	getNextCode()
void	initializeStringTable() Initialize the string table.
void	writeString(byte[] string) Write out the string just uncompressed.

Field Detail

andTable

int[] andTable

bitPointer

int bitPointer

bitsToGet

int bitsToGet

bytePointer

int bytePointer

data

byte[] data

nextBits

int nextBits

nextData

int nextData

stringTable

byte[][] stringTable

tableIndex

int tableIndex

uncompData

OutputStream uncompData

Constructor Detail

LZWDecoder

public LZWDecoder()

Method Detail

addStringToTable

public void addStringToTable(byte[] oldString, byte newString)

Add a new string to the string table.

addStringToTable

public void addStringToTable(byte[] string)

Add a new string to the string table.

composeString

public byte[] composeString(byte[] oldString, byte newString)

Append newString to the end of oldString.

decode

public void decode(byte[] data, OutputStream uncompData)

Method to decode LZW compressed data.

Parameters: data The compressed data. uncompData Array to return the uncompressed data in.

getNextCode

public int getNextCode()

initializeStringTable

public void initializeStringTable()

Initialize the string table.

writeString

public void writeString(byte[] string)

Write out the string just uncompressed.