Decompression Class Reference

#include <explode.hxx>

Collaboration diagram for Decompression:

Public Member Functions
	Decompression (SvStream *pInStream, SvStream *pOutStream)
sal_Int32	explode ()
	decompress from instream to outstream More...
sal_uInt32	ReadBits (sal_uInt16 iCount, sal_uInt32 &nBits)
	@descr read specified bits from input stream @argument iCount - number of bits to be read, less than 31 @argument nBits - bits read More...
sal_uInt32	Decode (HuffmanTreeNode *pRoot)
	@descr decode tree 1 for length More...

Private Member Functions
void	ConstructTree1 ()
	@descr construct tree 1 for length More...
void	ConstructTree2 ()
	@descr construct tree 2 for distance More...
void	fillArray ()
	@descr More...

Static Private Member Functions
static void	ToString (sal_uInt32 nBits, char *pChar, sal_uInt32 nLen)
	@descr bits to string More...

Private Attributes
SvStream *	m_pInStream
	compressed/decompressed stream More...
SvStream *	m_pOutStream
sal_uInt32	m_nCurrent4Byte
sal_uInt32	m_nBitsLeft
sal_uInt8	m_Buffer [CHUNK]
sal_uInt8 *	m_pBuffer
sal_uInt32	m_nBytesLeft
sal_uInt8	m_Output [MAXWIN]
sal_uInt32	m_nOutputBufferPos
sal_uInt32	m_iArrayOfM [16]
std::unique_ptr< HuffmanTreeNode >	m_Tree1
std::unique_ptr< HuffmanTreeNode >	m_Tree2

Detailed Description

Definition at line 84 of file explode.hxx.

Constructor & Destructor Documentation

Decompression()

Decompression::Decompression	(	SvStream *	pInStream,
		SvStream *	pOutStream
	)

Definition at line 150 of file explode.cxx.

References ConstructTree1(), ConstructTree2(), fillArray(), m_pBuffer, m_pInStream, and m_pOutStream.

Member Function Documentation

ConstructTree1()

void Decompression::ConstructTree1 ( )

private

@descr construct tree 1 for length

Returns

Definition at line 381 of file explode.cxx.

References i, m_Tree1, and Tree1String.

Referenced by Decompression().

ConstructTree2()

void Decompression::ConstructTree2 ( )

private

@descr construct tree 2 for distance

Returns

Definition at line 429 of file explode.cxx.

References i, m_Tree2, and Tree2String.

Referenced by Decompression().

Decode()

sal_uInt32 Decompression::Decode

(

HuffmanTreeNode *

pRoot

)

@descr decode tree 1 for length

Returns

the decoded value

Definition at line 352 of file explode.cxx.

References i, HuffmanTreeNode::QueryValue(), ReadBits(), and ToString().

Referenced by explode().

explode()

sal_Int32 Decompression::explode

(

)

decompress from instream to outstream

@descr decompress input and write output

Returns

0 - read OK, otherwise error

Definition at line 208 of file explode.cxx.

References Decode(), distance, SvStream::FlushBuffer(), i, L2, m_iArrayOfM, m_nOutputBufferPos, m_Output, m_pOutStream, m_Tree1, m_Tree2, MAXWIN, P1, P2, ReadBits(), SvStream::ReadBytes(), SvStream::Seek(), SvStream::SeekRel(), SvStream::Tell(), and SvStream::WriteBytes().

Referenced by Decompress().

fillArray()

void Decompression::fillArray ( )

private

@descr

Returns

Definition at line 443 of file explode.cxx.

References i, and m_iArrayOfM.

Referenced by Decompression().

ReadBits()

sal_uInt32 Decompression::ReadBits	(	sal_uInt16	iCount,
		sal_uInt32 &	nBits
	)

@descr read specified bits from input stream @argument iCount - number of bits to be read, less than 31 @argument nBits - bits read

Returns

0 - read OK, otherwise error

Definition at line 173 of file explode.cxx.

References CHUNK, m_Buffer, m_nBitsLeft, m_nBytesLeft, m_nCurrent4Byte, m_pBuffer, m_pInStream, and SvStream::ReadBytes().

Referenced by Decode(), and explode().

ToString()

void Decompression::ToString ( sal_uInt32  nBits, char *  pChar, sal_uInt32  nLen  )

staticprivate

@descr bits to string

Returns

Definition at line 337 of file explode.cxx.

References i, nBit, and pChar.

Referenced by Decode().

Member Data Documentation

m_Buffer

sal_uInt8 Decompression::m_Buffer[CHUNK]

private

Definition at line 107 of file explode.hxx.

Referenced by ReadBits().

m_iArrayOfM

sal_uInt32 Decompression::m_iArrayOfM[16]

private

Definition at line 114 of file explode.hxx.

Referenced by explode(), and fillArray().

m_nBitsLeft

sal_uInt32 Decompression::m_nBitsLeft

private

Definition at line 105 of file explode.hxx.

Referenced by ReadBits().

m_nBytesLeft

sal_uInt32 Decompression::m_nBytesLeft

private

Definition at line 109 of file explode.hxx.

Referenced by ReadBits().

m_nCurrent4Byte

sal_uInt32 Decompression::m_nCurrent4Byte

private

Definition at line 104 of file explode.hxx.

Referenced by ReadBits().

m_nOutputBufferPos

sal_uInt32 Decompression::m_nOutputBufferPos

private

Definition at line 112 of file explode.hxx.

Referenced by explode().

m_Output

sal_uInt8 Decompression::m_Output[MAXWIN]

private

Definition at line 111 of file explode.hxx.

Referenced by explode().

m_pBuffer

sal_uInt8* Decompression::m_pBuffer

private

Definition at line 108 of file explode.hxx.

Referenced by ReadBits().

m_pInStream

SvStream* Decompression::m_pInStream

private

compressed/decompressed stream

Definition at line 101 of file explode.hxx.

Referenced by Decompression(), and ReadBits().

m_pOutStream

SvStream* Decompression::m_pOutStream

private

Definition at line 102 of file explode.hxx.

Referenced by Decompression(), and explode().

m_Tree1

std::unique_ptr<HuffmanTreeNode> Decompression::m_Tree1

private

Definition at line 116 of file explode.hxx.

Referenced by ConstructTree1(), and explode().

m_Tree2

std::unique_ptr<HuffmanTreeNode> Decompression::m_Tree2

private

Definition at line 116 of file explode.hxx.

Referenced by ConstructTree2(), and explode().

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

• explode.hxx
• explode.cxx