ICSharpCode.SharpZipLib.BZip2.BZip2InputStream Class Reference

An input stream that decompresses files in the BZip2 format. More...

Inheritance diagram for ICSharpCode.SharpZipLib.BZip2.BZip2InputStream:

Collaboration diagram for ICSharpCode.SharpZipLib.BZip2.BZip2InputStream:

Public Member Functions
	BZip2InputStream (Stream stream)
	Construct instance for reading from stream.
override void	Flush ()
	Flushes the stream.
override long	Seek (long offset, SeekOrigin origin)
	Set the streams position. This operation is not supported and will throw a NotSupportedException.
override void	SetLength (long value)
	Sets the length of this stream to the given value. This operation is not supported and will throw a NotSupportedExceptionortedException.
override void	Write (byte[] buffer, int offset, int count)
	Writes a block of bytes to this stream using data from a buffer. This operation is not supported and will throw a NotSupportedException.
override void	WriteByte (byte value)
	Writes a byte to the current position in the file stream. This operation is not supported and will throw a NotSupportedException.
override int	Read (byte[] buffer, int offset, int count)
	Read a sequence of bytes and advances the read position by one byte.
override void	Close ()
	Closes the stream, releasing any associated resources.
override int	ReadByte ()
	Read a byte from stream advancing position.

Properties
bool	IsStreamOwner [get, set]
	Get/set flag indicating ownership of underlying stream. When the flag is true Close will close the underlying stream also.
override bool	CanRead [get]
	Gets a value indicating if the stream supports reading.
override bool	CanSeek [get]
	Gets a value indicating whether the current stream supports seeking.
override bool	CanWrite [get]
	Gets a value indicating whether the current stream supports writing. This property always returns false.
override long	Length [get]
	Gets the length in bytes of the stream.
override long	Position [get, set]
	Gets or sets the streams position. Setting the position is not supported and will throw a NotSupportException.

Private Member Functions
void	MakeMaps ()
void	Initialize ()
void	InitBlock ()
void	EndBlock ()
void	Complete ()
void	BsSetStream (Stream stream)
void	FillBuffer ()
int	BsR (int n)
char	BsGetUChar ()
int	BsGetIntVS (int numBits)
int	BsGetInt32 ()
void	RecvDecodingTables ()
void	GetAndMoveToFrontDecode ()
void	SetupBlock ()
void	SetupRandPartA ()
void	SetupNoRandPartA ()
void	SetupRandPartB ()
void	SetupRandPartC ()
void	SetupNoRandPartB ()
void	SetupNoRandPartC ()
void	SetDecompressStructureSizes (int newSize100k)

Static Private Member Functions
static void	CompressedStreamEOF ()
static void	BlockOverrun ()
static void	BadBlockHeader ()
static void	CrcError ()
static void	HbCreateDecodeTables (int[] limit, int[] baseArray, int[] perm, char[] length, int minLen, int maxLen, int alphaSize)

Private Attributes
int	last
int	origPtr
int	blockSize100k
bool	blockRandomised
int	bsBuff
int	bsLive
IChecksum	mCrc = new StrangeCRC()
bool[]	inUse = new bool[256]
int	nInUse
byte[]	seqToUnseq = new byte[256]
byte[]	unseqToSeq = new byte[256]
byte[]	selector = new byte[BZip2Constants.MaximumSelectors]
byte[]	selectorMtf = new byte[BZip2Constants.MaximumSelectors]
int[]	tt
byte[]	ll8
int[]	unzftab = new int[256]
int[][]	limit = new int[BZip2Constants.GroupCount][]
int[][]	baseArray = new int[BZip2Constants.GroupCount][]
int[][]	perm = new int[BZip2Constants.GroupCount][]
int[]	minLens = new int[BZip2Constants.GroupCount]
Stream	baseStream
bool	streamEnd
int	currentChar = -1
int	currentState = START_BLOCK_STATE
int	storedBlockCRC
int	storedCombinedCRC
int	computedBlockCRC
uint	computedCombinedCRC
int	count
int	chPrev
int	ch2
int	tPos
int	rNToGo
int	rTPos
int	i2
int	j2
byte	z
bool	isStreamOwner = true

Static Private Attributes
const int	START_BLOCK_STATE = 1
const int	RAND_PART_A_STATE = 2
const int	RAND_PART_B_STATE = 3
const int	RAND_PART_C_STATE = 4
const int	NO_RAND_PART_A_STATE = 5
const int	NO_RAND_PART_B_STATE = 6
const int	NO_RAND_PART_C_STATE = 7

Detailed Description

An input stream that decompresses files in the BZip2 format.

Constructor & Destructor Documentation

BZip2InputStream()

ICSharpCode.SharpZipLib.BZip2.BZip2InputStream.BZip2InputStream

(

Stream

stream

)

Construct instance for reading from stream.

Parameters

stream

Data source

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Member Function Documentation

BadBlockHeader()

void ICSharpCode.SharpZipLib.BZip2.BZip2InputStream.BadBlockHeader ( )

staticprivate

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BlockOverrun()

void ICSharpCode.SharpZipLib.BZip2.BZip2InputStream.BlockOverrun ( )

staticprivate

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BsGetInt32()

int ICSharpCode.SharpZipLib.BZip2.BZip2InputStream.BsGetInt32 ( )

private

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BsGetIntVS()

int ICSharpCode.SharpZipLib.BZip2.BZip2InputStream.BsGetIntVS ( int numBits )

private

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BsGetUChar()

char ICSharpCode.SharpZipLib.BZip2.BZip2InputStream.BsGetUChar ( )

private

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BsR()

int ICSharpCode.SharpZipLib.BZip2.BZip2InputStream.BsR ( int n )

private

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BsSetStream()

void ICSharpCode.SharpZipLib.BZip2.BZip2InputStream.BsSetStream ( Stream stream )

private

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Close()

override void ICSharpCode.SharpZipLib.BZip2.BZip2InputStream.Close

(

)

Closes the stream, releasing any associated resources.

Complete()

void ICSharpCode.SharpZipLib.BZip2.BZip2InputStream.Complete ( )

private

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CompressedStreamEOF()

void ICSharpCode.SharpZipLib.BZip2.BZip2InputStream.CompressedStreamEOF ( )

staticprivate

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CrcError()

void ICSharpCode.SharpZipLib.BZip2.BZip2InputStream.CrcError ( )

staticprivate

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EndBlock()

void ICSharpCode.SharpZipLib.BZip2.BZip2InputStream.EndBlock ( )

private

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FillBuffer()

void ICSharpCode.SharpZipLib.BZip2.BZip2InputStream.FillBuffer ( )

private

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Flush()

override void ICSharpCode.SharpZipLib.BZip2.BZip2InputStream.Flush

(

)

Flushes the stream.

GetAndMoveToFrontDecode()

void ICSharpCode.SharpZipLib.BZip2.BZip2InputStream.GetAndMoveToFrontDecode ( )

private

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HbCreateDecodeTables()

void ICSharpCode.SharpZipLib.BZip2.BZip2InputStream.HbCreateDecodeTables ( int[] limit, int[] baseArray, int[] perm, char[] length, int minLen, int maxLen, int alphaSize )

staticprivate

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InitBlock()

void ICSharpCode.SharpZipLib.BZip2.BZip2InputStream.InitBlock ( )

private

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Initialize()

void ICSharpCode.SharpZipLib.BZip2.BZip2InputStream.Initialize ( )

private

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MakeMaps()

void ICSharpCode.SharpZipLib.BZip2.BZip2InputStream.MakeMaps ( )

private

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Read()

override int ICSharpCode.SharpZipLib.BZip2.BZip2InputStream.Read	(	byte[]	buffer,
		int	offset,
		int	count )

Read a sequence of bytes and advances the read position by one byte.

Parameters

buffer	Array of bytes to store values in
offset	Offset in array to begin storing data
count	The maximum number of bytes to read

Returns

The total number of bytes read into the buffer. This might be less than the number of bytes requested if that number of bytes are not currently available or zero if the end of the stream is reached.

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ReadByte()

override int ICSharpCode.SharpZipLib.BZip2.BZip2InputStream.ReadByte

(

)

Read a byte from stream advancing position.

Returns

byte read or -1 on end of stream

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RecvDecodingTables()

void ICSharpCode.SharpZipLib.BZip2.BZip2InputStream.RecvDecodingTables ( )

private

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Seek()

override long ICSharpCode.SharpZipLib.BZip2.BZip2InputStream.Seek	(	long	offset,
		SeekOrigin	origin )

Set the streams position. This operation is not supported and will throw a NotSupportedException.

Parameters

offset	A byte offset relative to the origin parameter.
origin	A value of type SeekOrigin indicating the reference point used to obtain the new position.

Returns

The new position of the stream.

Exceptions

NotSupportedException

Any access

SetDecompressStructureSizes()

void ICSharpCode.SharpZipLib.BZip2.BZip2InputStream.SetDecompressStructureSizes ( int newSize100k )

private

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SetLength()

override void ICSharpCode.SharpZipLib.BZip2.BZip2InputStream.SetLength

(

long

value

)

Sets the length of this stream to the given value. This operation is not supported and will throw a NotSupportedExceptionortedException.

Parameters

value

The new length for the stream.

Exceptions

NotSupportedException

Any access

SetupBlock()

void ICSharpCode.SharpZipLib.BZip2.BZip2InputStream.SetupBlock ( )

private

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SetupNoRandPartA()

void ICSharpCode.SharpZipLib.BZip2.BZip2InputStream.SetupNoRandPartA ( )

private

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SetupNoRandPartB()

void ICSharpCode.SharpZipLib.BZip2.BZip2InputStream.SetupNoRandPartB ( )

private

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SetupNoRandPartC()

void ICSharpCode.SharpZipLib.BZip2.BZip2InputStream.SetupNoRandPartC ( )

private

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SetupRandPartA()

void ICSharpCode.SharpZipLib.BZip2.BZip2InputStream.SetupRandPartA ( )

private

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SetupRandPartB()

void ICSharpCode.SharpZipLib.BZip2.BZip2InputStream.SetupRandPartB ( )

private

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SetupRandPartC()

void ICSharpCode.SharpZipLib.BZip2.BZip2InputStream.SetupRandPartC ( )

private

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Write()

override void ICSharpCode.SharpZipLib.BZip2.BZip2InputStream.Write	(	byte[]	buffer,
		int	offset,
		int	count )

Writes a block of bytes to this stream using data from a buffer. This operation is not supported and will throw a NotSupportedException.

Parameters

buffer	The buffer to source data from.
offset	The offset to start obtaining data from.
count	The number of bytes of data to write.

Exceptions

NotSupportedException

Any access

WriteByte()

override void ICSharpCode.SharpZipLib.BZip2.BZip2InputStream.WriteByte

(

byte

value

)

Writes a byte to the current position in the file stream. This operation is not supported and will throw a NotSupportedException.

Parameters

value

The value to write.

Exceptions

NotSupportedException

Any access

Member Data Documentation

baseArray

int [][] ICSharpCode.SharpZipLib.BZip2.BZip2InputStream.baseArray = new int[BZip2Constants.GroupCount][]

private

baseStream

Stream ICSharpCode.SharpZipLib.BZip2.BZip2InputStream.baseStream

private

blockRandomised

bool ICSharpCode.SharpZipLib.BZip2.BZip2InputStream.blockRandomised

private

blockSize100k

int ICSharpCode.SharpZipLib.BZip2.BZip2InputStream.blockSize100k

private

bsBuff

int ICSharpCode.SharpZipLib.BZip2.BZip2InputStream.bsBuff

private

bsLive

int ICSharpCode.SharpZipLib.BZip2.BZip2InputStream.bsLive

private

ch2

int ICSharpCode.SharpZipLib.BZip2.BZip2InputStream.ch2

private

chPrev

int ICSharpCode.SharpZipLib.BZip2.BZip2InputStream.chPrev

private

computedBlockCRC

int ICSharpCode.SharpZipLib.BZip2.BZip2InputStream.computedBlockCRC

private

computedCombinedCRC

uint ICSharpCode.SharpZipLib.BZip2.BZip2InputStream.computedCombinedCRC

private

count

int ICSharpCode.SharpZipLib.BZip2.BZip2InputStream.count

private

currentChar

int ICSharpCode.SharpZipLib.BZip2.BZip2InputStream.currentChar = -1

private

currentState

int ICSharpCode.SharpZipLib.BZip2.BZip2InputStream.currentState = START_BLOCK_STATE

private

i2

int ICSharpCode.SharpZipLib.BZip2.BZip2InputStream.i2

private

inUse

bool [] ICSharpCode.SharpZipLib.BZip2.BZip2InputStream.inUse = new bool[256]

private

isStreamOwner

bool ICSharpCode.SharpZipLib.BZip2.BZip2InputStream.isStreamOwner = true

private

j2

int ICSharpCode.SharpZipLib.BZip2.BZip2InputStream.j2

private

last

int ICSharpCode.SharpZipLib.BZip2.BZip2InputStream.last

private

limit

int [][] ICSharpCode.SharpZipLib.BZip2.BZip2InputStream.limit = new int[BZip2Constants.GroupCount][]

private

ll8

byte [] ICSharpCode.SharpZipLib.BZip2.BZip2InputStream.ll8

private

mCrc

IChecksum ICSharpCode.SharpZipLib.BZip2.BZip2InputStream.mCrc = new StrangeCRC()

private

minLens

int [] ICSharpCode.SharpZipLib.BZip2.BZip2InputStream.minLens = new int[BZip2Constants.GroupCount]

private

nInUse

int ICSharpCode.SharpZipLib.BZip2.BZip2InputStream.nInUse

private

NO_RAND_PART_A_STATE

const int ICSharpCode.SharpZipLib.BZip2.BZip2InputStream.NO_RAND_PART_A_STATE = 5

staticprivate

NO_RAND_PART_B_STATE

const int ICSharpCode.SharpZipLib.BZip2.BZip2InputStream.NO_RAND_PART_B_STATE = 6

staticprivate

NO_RAND_PART_C_STATE

const int ICSharpCode.SharpZipLib.BZip2.BZip2InputStream.NO_RAND_PART_C_STATE = 7

staticprivate

origPtr

int ICSharpCode.SharpZipLib.BZip2.BZip2InputStream.origPtr

private

perm

int [][] ICSharpCode.SharpZipLib.BZip2.BZip2InputStream.perm = new int[BZip2Constants.GroupCount][]

private

RAND_PART_A_STATE

const int ICSharpCode.SharpZipLib.BZip2.BZip2InputStream.RAND_PART_A_STATE = 2

staticprivate

RAND_PART_B_STATE

const int ICSharpCode.SharpZipLib.BZip2.BZip2InputStream.RAND_PART_B_STATE = 3

staticprivate

RAND_PART_C_STATE

const int ICSharpCode.SharpZipLib.BZip2.BZip2InputStream.RAND_PART_C_STATE = 4

staticprivate

rNToGo

int ICSharpCode.SharpZipLib.BZip2.BZip2InputStream.rNToGo

private

rTPos

int ICSharpCode.SharpZipLib.BZip2.BZip2InputStream.rTPos

private

selector

byte [] ICSharpCode.SharpZipLib.BZip2.BZip2InputStream.selector = new byte[BZip2Constants.MaximumSelectors]

private

selectorMtf

byte [] ICSharpCode.SharpZipLib.BZip2.BZip2InputStream.selectorMtf = new byte[BZip2Constants.MaximumSelectors]

private

seqToUnseq

byte [] ICSharpCode.SharpZipLib.BZip2.BZip2InputStream.seqToUnseq = new byte[256]

private

START_BLOCK_STATE

const int ICSharpCode.SharpZipLib.BZip2.BZip2InputStream.START_BLOCK_STATE = 1

staticprivate

storedBlockCRC

int ICSharpCode.SharpZipLib.BZip2.BZip2InputStream.storedBlockCRC

private

storedCombinedCRC

int ICSharpCode.SharpZipLib.BZip2.BZip2InputStream.storedCombinedCRC

private

streamEnd

bool ICSharpCode.SharpZipLib.BZip2.BZip2InputStream.streamEnd

private

tPos

int ICSharpCode.SharpZipLib.BZip2.BZip2InputStream.tPos

private

tt

int [] ICSharpCode.SharpZipLib.BZip2.BZip2InputStream.tt

private

unseqToSeq

byte [] ICSharpCode.SharpZipLib.BZip2.BZip2InputStream.unseqToSeq = new byte[256]

private

unzftab

int [] ICSharpCode.SharpZipLib.BZip2.BZip2InputStream.unzftab = new int[256]

private

z

byte ICSharpCode.SharpZipLib.BZip2.BZip2InputStream.z

private

Property Documentation

CanRead

override bool ICSharpCode.SharpZipLib.BZip2.BZip2InputStream.CanRead

get

Gets a value indicating if the stream supports reading.

CanSeek

override bool ICSharpCode.SharpZipLib.BZip2.BZip2InputStream.CanSeek

get

Gets a value indicating whether the current stream supports seeking.

CanWrite

override bool ICSharpCode.SharpZipLib.BZip2.BZip2InputStream.CanWrite

get

Gets a value indicating whether the current stream supports writing. This property always returns false.

IsStreamOwner

bool ICSharpCode.SharpZipLib.BZip2.BZip2InputStream.IsStreamOwner

getset

Get/set flag indicating ownership of underlying stream. When the flag is true Close will close the underlying stream also.

Length

override long ICSharpCode.SharpZipLib.BZip2.BZip2InputStream.Length

get

Gets the length in bytes of the stream.

Position

override long ICSharpCode.SharpZipLib.BZip2.BZip2InputStream.Position

getset

Gets or sets the streams position. Setting the position is not supported and will throw a NotSupportException.

Exceptions

NotSupportedException

Any attempt to set the position

---

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

• ICSharpCode.SharpZLib/BZip2/BZip2InputStream.cs