Lzw Class Reference

Class for handling LZW encoded data. More...

Inheritance diagram for Lzw:

Public Member Functions
	decode ($data)
	Method to decode LZW compressed data.

Protected Member Functions
	addStringToTable ($oldString, $newString='')
	Add a new string to the string table.
	getNextCode ()
	Returns the next 9, 10, 11 or 12 bits.
	initsTable ()
	Initialize the string table.

Protected Attributes
array	$andTable = [511, 1023, 2047, 4095]
int	$bitsToGet = 9
int	$bytePointer
null string	$data
int	$dataLength = 0
int	$nextBits = 0
int	$nextData = 0
array	$sTable = []
int	$tIdx

Detailed Description

Class for handling LZW encoded data.

Member Function Documentation

addStringToTable()

Lzw::addStringToTable ( $oldString, $newString = '' )

protected

Add a new string to the string table.

Parameters

string	$oldString
string	$newString

decode()

Lzw::decode

(

$data

)

Method to decode LZW compressed data.

Parameters

string

$data

The compressed data

Return values

string

The uncompressed data

Exceptions

LzwException

Implements FilterInterface.

getNextCode()

Lzw::getNextCode ( )

protected

Returns the next 9, 10, 11 or 12 bits.

Return values

int

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

• mod/assign/feedback/editpdf/fpdi/PdfParser/Filter/Lzw.php