www.pudn.com > HuffmanCoding_src.zip > En_Decode.h

// En_Decode.h: interface for the En_Decode class. 
// 
////////////////////////////////////////////////////////////////////// 
 
#if !defined(AFX_EN_DECODE_H__EFEDB134_3A40_4855_8EA5_828E486E6B35__INCLUDED_) 
#define AFX_EN_DECODE_H__EFEDB134_3A40_4855_8EA5_828E486E6B35__INCLUDED_ 
 
#if _MSC_VER > 1000 
#pragma once 
#endif // _MSC_VER > 1000 
 
#include  
#include  
#include  
#include  
 
typedef unsigned int FREQCOUNTER; 
 
struct HufNodeStruc 
{ 
	FREQCOUNTER freq; 
	int parent; 
	int right; 
	int left; 
}; 
 
const int MaxFileNameLength = 256; 
 
class En_Decode 
{ 
public: 
	En_Decode(const char *fin_name, const char *fout_name); 
	En_Decode(const char *fin_name); 
	En_Decode(); 
	virtual ~En_Decode(); 
	void Encode(); 
	void Decode(); 
	void SetInputFileName(const char *pathname, const char *extname); 
	void SetOutputFileName(const char *pathname); 
	void GetExtName(char *extname); 
	FREQCOUNTER GetMinFreq(); 
	FREQCOUNTER GetMaxFreq(); 
	FREQCOUNTER GetFreq(const int idx); 
	int GetActiveSymbols(); 
	FREQCOUNTER GetActualDataLength(); 
	FREQCOUNTER GetUncodedFileLength(); 
	double GetUncodedFileCodeLength(); 
	double GetSourceFileEntropy(); 
private: 
	void BuildHufTree(); 
	void Output1Bit(int bit); 
	void Compress1Byte(int node, int child); 
private: 
	std::ofstream out_file; 
	HufNodeStruc OurTree[511]; 
	int NumOfRootNode; 
	unsigned char BitContainer; 
	unsigned char BitCounter; 
	char infile_buf[MaxFileNameLength]; 
	char outfile_buf[MaxFileNameLength]; 
	unsigned char EncodedCode[256]; 
	char ext_name[10]; 
	unsigned char ext_length; 
	int bit_count; 
 
	FREQCOUNTER OrigBytes; 
	int ActiveSymbs; 
	FREQCOUNTER DestLength; 
 
	void StrCopy(const char *from, char *to); 
	unsigned char GetStrLength(const char *str); 
}; 
 
#endif // !defined(AFX_EN_DECODE_H__EFEDB134_3A40_4855_8EA5_828E486E6B35__INCLUDED_)