lzh.h

蓝牙通讯软件

#ifndef _LZH_H_
#define _LZH_H_

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>

#define EXIT_OK 0
#define EXIT_FAILED -1
#define N		4096	/* Size of string buffer */
#define F		60	/* Size of look-ahead buffer */
#define THRESHOLD	2
#define NIL		N	/* End of tree's node  */
#define N_CHAR  	(256 - THRESHOLD + F)
				/* character code (= 0..N_CHAR-1) */
#define T 		(N_CHAR * 2 - 1)	/* Size of table */
#define R 		(T - 1)			/* root position */
#define MAX_FREQ	0x8000
					/* update when cumulative frequency */
					/* reaches to this value */
typedef unsigned char uchar;

/*
 * Tables for encoding/decoding upper 6 bits of
 * sliding dictionary pointer
 */
/* encoder table */

class FileEncodeDecode
{
     private:
	    char *infile, *outfile;
	    unsigned long textsize, codesize, printcount;
	    unsigned char text_buf[N + F - 1], getlen, putlen;
	    short	match_position, match_length,
		lson[N + 1], rson[N + 257], dad[N + 1];
	    unsigned short freq[T + 1];	/* cumulative freq table */
	    short prnt[T + N_CHAR];
	    short son[T];
	    unsigned short getbuf, putbuf, code, len;
        unsigned short posOut, posIn;
		long countEncoded;

     private:
	    void Error(char *message)
	    {
		printf( "%s\n", message );
	    };
	    void InitTree( void );
	    void InsertNode( short r );
	    void DeleteNode( short p );
	    short GetBit(void);	/* get one bit */
	    short GetByte(void);	/* get a byte */
	    void Putcode(short l, unsigned short c);	/* output c bits */
	    void StartHuff(void);
	    void reconst(void);
	    void update(short c);
	    void EncodeChar(unsigned short c);
	    void EncodePosition(unsigned short c);
	    void EncodeEnd(void);
	    short DecodeChar(void);
	    short DecodePosition(void);
		short Putc(short putBuf, char *outFile);
        short Getc(char *inFile);

     public:
	    FileEncodeDecode(char *i_file, char *o_file,long count_file);
	    ~FileEncodeDecode();
	    long Encode(void);  /* Encoding/Compressing */
	    long Decode(void);  /* Decoding/Uncompressing */
};

#endif