HuffmanDecoder Class Reference

Huffman Decoder. More...

#include <zinflate.h>

Classes
struct	CodeInfo
class	Err
struct	LookupEntry

Public Types
enum	{ MAX_CODE_BITS = sizeof(code_t)*8 }
typedef unsigned int	code_t
typedef unsigned int	value_t

Public Member Functions
	HuffmanDecoder ()
	HuffmanDecoder (const unsigned int *codeBitLengths, unsigned int nCodes)
void	Initialize (const unsigned int *codeBitLengths, unsigned int nCodes)
unsigned int	Decode (code_t code, value_t &value) const
bool	Decode (LowFirstBitReader &reader, value_t &value) const

Private Member Functions
void	FillCacheEntry (LookupEntry &entry, code_t normalizedCode) const

Static Private Member Functions
static code_t	NormalizeCode (code_t code, unsigned int codeBits)

Private Attributes
unsigned int	m_maxCodeBits
unsigned int	m_cacheBits
unsigned int	m_cacheMask
unsigned int	m_normalizedCacheMask
std::vector< CodeInfo, AllocatorWithCleanup< CodeInfo > >	m_codeToValue
std::vector< LookupEntry, AllocatorWithCleanup< LookupEntry > >	m_cache

Friends
struct	CodeLessThan

Detailed Description

Huffman Decoder.

Since

Crypto++ 1.0

Definition at line 36 of file zinflate.h.

Member Typedef Documentation

typedef unsigned int HuffmanDecoder::code_t

Definition at line 39 of file zinflate.h.

typedef unsigned int HuffmanDecoder::value_t

Definition at line 40 of file zinflate.h.

Member Enumeration Documentation

anonymous enum

Enumerator
MAX_CODE_BITS

Definition at line 41 of file zinflate.h.

Constructor & Destructor Documentation

HuffmanDecoder::HuffmanDecoder ( )

inline

Definition at line 45 of file zinflate.h.

HuffmanDecoder::HuffmanDecoder ( const unsigned int *  codeBitLengths, unsigned int  nCodes  )

inline

Definition at line 46 of file zinflate.h.

Here is the call graph for this function:

Member Function Documentation

unsigned int HuffmanDecoder::Decode ( code_t  code, value_t &  value  ) const

inline

Definition at line 182 of file zinflate.cpp.

Here is the call graph for this function:

Here is the caller graph for this function:

bool HuffmanDecoder::Decode	(	LowFirstBitReader &	reader,
		value_t &	value
	)		const

Definition at line 209 of file zinflate.cpp.

Here is the call graph for this function:

void HuffmanDecoder::FillCacheEntry ( LookupEntry &  entry, code_t  normalizedCode  ) const

private

Definition at line 155 of file zinflate.cpp.

void HuffmanDecoder::Initialize	(	const unsigned int *	codeBitLengths,
		unsigned int	nCodes
	)

Definition at line 65 of file zinflate.cpp.

Here is the call graph for this function:

Here is the caller graph for this function:

HuffmanDecoder::code_t HuffmanDecoder::NormalizeCode ( HuffmanDecoder::code_t  code, unsigned int  codeBits  )

inlinestaticprivate

Definition at line 60 of file zinflate.cpp.

Friends And Related Function Documentation

friend struct CodeLessThan

friend

Definition at line 55 of file zinflate.h.

Member Data Documentation

std::vector<LookupEntry, AllocatorWithCleanup<LookupEntry> > HuffmanDecoder::m_cache

mutableprivate

Definition at line 86 of file zinflate.h.

unsigned int HuffmanDecoder::m_cacheBits

private

Definition at line 84 of file zinflate.h.

unsigned int HuffmanDecoder::m_cacheMask

private

Definition at line 84 of file zinflate.h.

std::vector<CodeInfo, AllocatorWithCleanup<CodeInfo> > HuffmanDecoder::m_codeToValue

private

Definition at line 85 of file zinflate.h.

unsigned int HuffmanDecoder::m_maxCodeBits

private

Definition at line 84 of file zinflate.h.

unsigned int HuffmanDecoder::m_normalizedCacheMask

private

Definition at line 84 of file zinflate.h.

---

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

• src/cryptopp/zinflate.h
• src/cryptopp/zinflate.cpp