diff options
Diffstat (limited to 'src/pklib/pklib.h')
| -rw-r--r-- | src/pklib/pklib.h | 148 |
1 files changed, 148 insertions, 0 deletions
diff --git a/src/pklib/pklib.h b/src/pklib/pklib.h new file mode 100644 index 0000000..f43da15 --- /dev/null +++ b/src/pklib/pklib.h @@ -0,0 +1,148 @@ +/*****************************************************************************/ +/* 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__ |