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SLIDEHUF.H
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C/C++ Source or Header
|
1992-11-03
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3KB
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105 lines
#include "lh386.h"
#include <stdio.h>
#include <limits.h>
#include "typedef.h"
#include "errmes.h"
struct encode_option
{
void (*output) ();
void (*encode_start) ();
void (*encode_end) ();
};
struct decode_option
{
ushort(*decode_c) ();
ushort(*decode_p) ();
void (*decode_start) ();
};
/* from slide.c */
#define MAX_DICBIT 13
#define MAX_DICSIZ (1U << MAX_DICBIT)
#define MATCHBIT 8 /* bits for MAXMATCH - THRESHOLD */
#define MAXMATCH 256 /* formerly F (not more than UCHAR_MAX + 1) */
#define THRESHOLD 3 /* choose optimal value */
extern int unpackable;
extern ulong origsize, compsize;
extern ushort dicbit;
extern ushort maxmatch;
extern ulong count;
extern ushort loc;
#if 0
extern uchar *text;
#else
extern uchar text[];
#endif
/* from huf.c */
#define NC (UCHAR_MAX + MAXMATCH + 2 - THRESHOLD)
/* alphabet = {0, 1, 2, ..., NC - 1} */
#define CBIT 9 /* $\lfloor \log_2 NC \rfloor + 1$ */
#define USHRT_BIT 16 /* (CHAR_BIT * sizeof(ushort)) */
extern ushort left[], right[];
extern uchar c_len[], pt_len[];
extern ushort c_freq[], c_table[], c_code[], p_freq[], pt_table[], pt_code[], t_freq[];
void output_st1(ushort c, ushort p);
void *alloc_buf(void);
void encode_start_st1(void);
void encode_end_st1(void);
ushort decode_c_st1(void);
ushort decode_p_st1(void);
void decode_start_st1(void);
/* from shuf.c */
void decode_start_st0(void);
void encode_p_st0(unsigned short j);
void encode_start_fix(void);
void decode_start_fix(void);
ushort decode_c_st0(void);
ushort decode_p_st0(void);
/* from dhuf.c */
extern uint n_max;
void start_c_dyn(void);
void decode_start_dyn(void);
ushort decode_c_dyn(void);
ushort decode_p_dyn(void);
void output_dyn(int code, unsigned int pos);
void encode_end_dyn(void);
/* from larc.c */
ushort decode_c_lzs(void);
ushort decode_p_lzs(int loc);
ushort decode_c_lz5(void);
ushort decode_p_lz5(int loc);
void decode_start_lzs(void);
void decode_start_lz5(void);
/* from maketbl.c */
void make_table(short nchar, uchar bitlen[], short tablebits, ushort table[]);
/* from maketree.c */
void make_code(short n, uchar len[], ushort code[]);
short make_tree(short nparm, ushort freqparm[], uchar lenparm[], ushort codeparam[]);
/* from crcio.c */
extern FILE *infile, *outfile;
extern ushort crc, bitbuf;
extern int dispflg;
void fillbuf(uchar n);
ushort getbits(uchar n);
void putcode(uchar n, ushort x);
void putbits(uchar n, ushort x);
int fread_crc(uchar * p, int n, FILE * f);
void fwrite_crc(uchar * p, int n, FILE * f);
void init_getbits(void);
void init_putbits(void);