lzx.c File Reference

#include "lzx.h"
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "windef.h"
#include "winbase.h"

Go to the source code of this file.

Data Structures
struct	LZXstate
struct	lzx_bits
Defines
#define	LZX_MIN_MATCH   (2)
#define	LZX_MAX_MATCH   (257)
#define	LZX_NUM_CHARS   (256)
#define	LZX_BLOCKTYPE_INVALID   (0) /* also blocktypes 4-7 invalid */
#define	LZX_BLOCKTYPE_VERBATIM   (1)
#define	LZX_BLOCKTYPE_ALIGNED   (2)
#define	LZX_BLOCKTYPE_UNCOMPRESSED   (3)
#define	LZX_PRETREE_NUM_ELEMENTS   (20)
#define	LZX_ALIGNED_NUM_ELEMENTS   (8) /* aligned offset tree #elements */
#define	LZX_NUM_PRIMARY_LENGTHS   (7) /* this one missing from spec! */
#define	LZX_NUM_SECONDARY_LENGTHS   (249) /* length tree #elements */
#define	LZX_PRETREE_MAXSYMBOLS   (LZX_PRETREE_NUM_ELEMENTS)
#define	LZX_PRETREE_TABLEBITS   (6)
#define	LZX_MAINTREE_MAXSYMBOLS   (LZX_NUM_CHARS + 50*8)
#define	LZX_MAINTREE_TABLEBITS   (12)
#define	LZX_LENGTH_MAXSYMBOLS   (LZX_NUM_SECONDARY_LENGTHS+1)
#define	LZX_LENGTH_TABLEBITS   (12)
#define	LZX_ALIGNED_MAXSYMBOLS   (LZX_ALIGNED_NUM_ELEMENTS)
#define	LZX_ALIGNED_TABLEBITS   (7)
#define	LZX_LENTABLE_SAFETY   (64) /* we allow length table decoding overruns */
#define	LZX_DECLARE_TABLE(tbl)
#define	ULONG_BITS   (sizeof(ULONG)<<3)
#define	INIT_BITSTREAM   do { bitsleft = 0; bitbuf = 0; } while (0)
#define	ENSURE_BITS(n)
#define	PEEK_BITS(n)   (bitbuf >> (ULONG_BITS - (n)))
#define	REMOVE_BITS(n)   ((bitbuf <<= (n)), (bitsleft -= (n)))
#define	READ_BITS(v, n)
#define	TABLEBITS(tbl)   (LZX_##tbl##_TABLEBITS)
#define	MAXSYMBOLS(tbl)   (LZX_##tbl##_MAXSYMBOLS)
#define	SYMTABLE(tbl)   (pState->tbl##_table)
#define	LENTABLE(tbl)   (pState->tbl##_len)
#define	BUILD_TABLE(tbl)
#define	READ_HUFFSYM(tbl, var)
#define	READ_LENGTHS(tbl, first, last)
Typedefs
typedef unsigned char	UBYTE
typedef unsigned short	UWORD
Functions
struct LZXstate *	LZXinit (int window)
void	LZXteardown (struct LZXstate *pState)
int	LZXreset (struct LZXstate *pState)
static int	make_decode_table (ULONG nsyms, ULONG nbits, UBYTE *length, UWORD *table)
static int	lzx_read_lens (struct LZXstate *pState, UBYTE *lens, ULONG first, ULONG last, struct lzx_bits *lb)
int	LZXdecompress (struct LZXstate *pState, unsigned char *inpos, unsigned char *outpos, int inlen, int outlen)
Variables
struct LZXstate	helpstring
static const UBYTE	extra_bits [51]
static const ULONG	position_base [51]