NufxLzw1InputStream (ShrinkItArchive 1.3.0-DEV)

java.lang.Object

java.io.InputStream

com.webcodepro.shrinkit.io.NufxLzw1InputStream

All Implemented Interfaces:: Closeable, AutoCloseable

public class NufxLzw1InputStream extends InputStream

The NufxLzw1InputStream reads a data fork or resource fork written in the NuFX LZW/1 format.

The layout of the LZW/1 data is as follows:

"Fork" Header
+0	Word	CRC-16 of the uncompressed data within the thread
+2	Byte	Low-level volume number use to format 5.25" disks
+3	Byte	RLE character used to decode this thread
Each subsequent 4K chunk of data
+0	Word	Length after RLE compression (if RLE is not used, length will be 4096
+2	Byte	A $01 indicates LZW applied to this chunk; $00 that LZW was not applied to this chunk

Note that the LZW string table is cleared after every chunk.

Constructor Summary

Constructors

Constructor

Description

NufxLzw1InputStream(LittleEndianByteInputStream dataStream)

Create the LZW/1 input stream.
Method Summary

Modifier and Type

Method

Description

long

getDataCrc()

int

getGivenCrc()

int

getRleCharacter()

int

getVolumeNumber()

boolean

isCrcValid()

Indicates if the computed CRC matches the CRC given in the data stream.

int

read()

Read the next byte in the decompressed data stream.

void

setGivenCrc(int givenCrc)

void

setRleCharacter(int rleCharacter)

void

setVolumeNumber(int volumeNumber)

Methods inherited from class java.io.InputStream
available, close, mark, markSupported, nullInputStream, read, read, readAllBytes, readNBytes, readNBytes, reset, skip, skipNBytes, transferTo

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details
- NufxLzw1InputStream
  
  public NufxLzw1InputStream(LittleEndianByteInputStream dataStream)
  
  Create the LZW/1 input stream.
Method Details
- read
  
  public int read() throws IOException
  
  Read the next byte in the decompressed data stream.
  
  Specified by:
  
  read in class InputStream
  
  Throws:
  
  IOException
- isCrcValid
  
  public boolean isCrcValid()
  
  Indicates if the computed CRC matches the CRC given in the data stream.
- getGivenCrc
  
  public int getGivenCrc()
- setGivenCrc
  
  public void setGivenCrc(int givenCrc)
- getVolumeNumber
  
  public int getVolumeNumber()
- setVolumeNumber
  
  public void setVolumeNumber(int volumeNumber)
- getRleCharacter
  
  public int getRleCharacter()
- setRleCharacter
  
  public void setRleCharacter(int rleCharacter)
- getDataCrc
  
  public long getDataCrc()