1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
|
/*****************************************************************************/
/* pklib.h Copyright (c) Ladislav Zezula 2003 */
/*---------------------------------------------------------------------------*/
/* Header file for PKWARE Data Compression Library */
/*---------------------------------------------------------------------------*/
/* Date Ver Who Comment */
/* -------- ---- --- ------- */
/* 31.03.03 1.00 Lad The first version of pkware.h */
/*****************************************************************************/
#ifndef __PKLIB_H__
#define __PKLIB_H__
//-----------------------------------------------------------------------------
// Defines
#define CMP_BINARY 0 // Binary compression
#define CMP_ASCII 1 // Ascii compression
#define CMP_NO_ERROR 0
#define CMP_INVALID_DICTSIZE 1
#define CMP_INVALID_MODE 2
#define CMP_BAD_DATA 3
#define CMP_ABORT 4
#define CMP_IMPLODE_DICT_SIZE1 1024 // Dictionary size of 1024
#define CMP_IMPLODE_DICT_SIZE2 2048 // Dictionary size of 2048
#define CMP_IMPLODE_DICT_SIZE3 4096 // Dictionary size of 4096
//-----------------------------------------------------------------------------
// Define calling convention
#ifndef PKEXPORT
#ifdef WIN32
#define PKEXPORT __cdecl // Use for normal __cdecl calling
#else
#define PKEXPORT
#endif
#endif
//-----------------------------------------------------------------------------
// Internal structures
// Compression structure
typedef struct
{
unsigned int distance; // 0000: Backward distance of the currently found repetition, decreased by 1
unsigned int out_bytes; // 0004: # bytes available in out_buff
unsigned int out_bits; // 0008: # of bits available in the last out byte
unsigned int dsize_bits; // 000C: Number of bits needed for dictionary size. 4 = 0x400, 5 = 0x800, 6 = 0x1000
unsigned int dsize_mask; // 0010: Bit mask for dictionary. 0x0F = 0x400, 0x1F = 0x800, 0x3F = 0x1000
unsigned int ctype; // 0014: Compression type (CMP_ASCII or CMP_BINARY)
unsigned int dsize_bytes; // 0018: Dictionary size in bytes
unsigned char dist_bits[0x40]; // 001C: Distance bits
unsigned char dist_codes[0x40]; // 005C: Distance codes
unsigned char nChBits[0x306]; // 009C: Table of literal bit lengths to be put to the output stream
unsigned short nChCodes[0x306]; // 03A2: Table of literal codes to be put to the output stream
unsigned short offs09AE; // 09AE:
void * param; // 09B0: User parameter
unsigned int (*read_buf)(char *buf, unsigned int *size, void *param); // 9B4
void (*write_buf)(char *buf, unsigned int *size, void *param); // 9B8
unsigned short offs09BC[0x204]; // 09BC:
unsigned long offs0DC4; // 0DC4:
unsigned short phash_to_index[0x900]; // 0DC8: Array of indexes (one for each PAIR_HASH) to the "pair_hash_offsets" table
unsigned short phash_to_index_end; // 1FC8: End marker for "phash_to_index" table
char out_buff[0x802]; // 1FCA: Compressed data
unsigned char work_buff[0x2204]; // 27CC: Work buffer
// + DICT_OFFSET => Dictionary
// + UNCMP_OFFSET => Uncompressed data
unsigned short phash_offs[0x2204]; // 49D0: Table of offsets for each PAIR_HASH
} TCmpStruct;
#define CMP_BUFFER_SIZE sizeof(TCmpStruct) // Size of compression structure.
// Defined as 36312 in pkware header file
// Decompression structure
typedef struct
{
unsigned long offs0000; // 0000
unsigned long ctype; // 0004: Compression type (CMP_BINARY or CMP_ASCII)
unsigned long outputPos; // 0008: Position in output buffer
unsigned long dsize_bits; // 000C: Dict size (4, 5, 6 for 0x400, 0x800, 0x1000)
unsigned long dsize_mask; // 0010: Dict size bitmask (0x0F, 0x1F, 0x3F for 0x400, 0x800, 0x1000)
unsigned long bit_buff; // 0014: 16-bit buffer for processing input data
unsigned long extra_bits; // 0018: Number of extra (above 8) bits in bit buffer
unsigned int in_pos; // 001C: Position in in_buff
unsigned long in_bytes; // 0020: Number of bytes in input buffer
void * param; // 0024: Custom parameter
unsigned int (*read_buf)(char *buf, unsigned int *size, void *param); // Pointer to function that reads data from the input stream
void (*write_buf)(char *buf, unsigned int *size, void *param);// Pointer to function that writes data to the output stream
unsigned char out_buff[0x2204]; // 0030: Output circle buffer.
// 0x0000 - 0x0FFF: Previous uncompressed data, kept for repetitions
// 0x1000 - 0x1FFF: Currently decompressed data
// 0x2000 - 0x2203: Reserve space for the longest possible repetition
unsigned char in_buff[0x800]; // 2234: Buffer for data to be decompressed
unsigned char DistPosCodes[0x100]; // 2A34: Table of distance position codes
unsigned char LengthCodes[0x100]; // 2B34: Table of length codes
unsigned char offs2C34[0x100]; // 2C34: Buffer for
unsigned char offs2D34[0x100]; // 2D34: Buffer for
unsigned char offs2E34[0x80]; // 2EB4: Buffer for
unsigned char offs2EB4[0x100]; // 2EB4: Buffer for
unsigned char ChBitsAsc[0x100]; // 2FB4: Buffer for
unsigned char DistBits[0x40]; // 30B4: Numbers of bytes to skip copied block length
unsigned char LenBits[0x10]; // 30F4: Numbers of bits for skip copied block length
unsigned char ExLenBits[0x10]; // 3104: Number of valid bits for copied block
unsigned short LenBase[0x10]; // 3114: Buffer for
} TDcmpStruct;
#define EXP_BUFFER_SIZE sizeof(TDcmpStruct) // Size of decompression structure
// Defined as 12596 in pkware headers
//-----------------------------------------------------------------------------
// Public functions
#ifdef __cplusplus
extern "C" {
#endif
unsigned int PKEXPORT implode(
unsigned int (*read_buf)(char *buf, unsigned int *size, void *param),
void (*write_buf)(char *buf, unsigned int *size, void *param),
char *work_buf,
void *param,
unsigned int *type,
unsigned int *dsize);
unsigned int PKEXPORT explode(
unsigned int (*read_buf)(char *buf, unsigned int *size, void *param),
void (*write_buf)(char *buf, unsigned int *size, void *param),
char *work_buf,
void *param);
// The original name "crc32" was changed to "crc32pk" due
// to compatibility with zlib
unsigned long PKEXPORT crc32_pklib(char *buffer, unsigned int *size, unsigned long *old_crc);
#ifdef __cplusplus
} // End of 'extern "C"' declaration
#endif
#endif // __PKLIB_H__
|
