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/*****************************************************************************/
/* 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__
#include <StormPort.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__
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