/*****************************************************************************/ /* pklib.h Copyright (c) Ladislav Zezula 2003 */ /*---------------------------------------------------------------------------*/ /* Header file for PKWARE Data Compression Library */ /*---------------------------------------------------------------------------*/ /* Date Ver Who Comment */ /* -------- ---- --- ------- */ /* 31.03.03 1.00 Lad Created */ /*****************************************************************************/ #ifndef __PKLIB_H__ #define __PKLIB_H__ #pragma once //----------------------------------------------------------------------------- // 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]; // 2E34: 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 //----------------------------------------------------------------------------- // Tables (in explode.c) extern const unsigned char DistBits[0x40]; extern const unsigned char DistCode[0x40]; extern const unsigned char ExLenBits[0x10]; extern const unsigned short LenBase[0x10]; extern const unsigned char LenBits[0x10]; extern const unsigned char LenCode[0x10]; extern const unsigned char ChBitsAsc[0x100]; extern const unsigned short ChCodeAsc[0x100]; //----------------------------------------------------------------------------- // 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 "crc32_pklib" 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__