unzipdate.h

zip解压源码.

struct huft {
  uch e;                /* number of extra bits or operation */
  uch b;                /* number of bits in this code or subcode */
  union {
    ush n;              /* literal, length base, or distance base */
    struct huft *t;     /* pointer to next level of table */
  } v;
};
////////////////////////////////////
typedef struct UnZipDate
{
	BYTE *source1;
	BYTE *dest1;
	DWORD sourceLen1;
	DWORD destLen1;
	DWORD inSize;
	DWORD outSize;
	int errorNumber;
	long  header_bytes;
	int method;	// = DEFLATED;/* compression method */
	int verbose;//	 = 0;      /* be verbose (-v) */
	long bytes_in;             /* number of input bytes */
	long bytes_out;            /* number of output bytes */
	unsigned insize;           /* valid bytes in inbuf */
	unsigned inptr;            /* index of next byte to be processed in inbuf */
	unsigned outcnt;           /* bytes in output buffer */
	ulg static_crc;
	ulg bb;                         /* bit buffer */
	unsigned bk;                    /* bits in bit buffer */
	int lbits;		// = 9; /* bits in base literal/length lookup table */
	int dbits;		// = 6; /* bits in base distance lookup table */
	unsigned hufts;         /* track memory usage */

	DECLARE(uch, inbuf,  INBUFSIZ +INBUF_EXTRA);
	DECLARE(uch, outbuf, OUTBUFSIZ+OUTBUF_EXTRA);
	DECLARE(ush, d_buf,  DIST_BUFSIZE);
	DECLARE(uch, window, 2L*WSIZE);
#ifndef MAXSEG_64K
    DECLARE(ush, tab_prefix, 1L<<BITS);
#else
    DECLARE(ush, tab_prefix0, 1L<<(BITS-1));
    DECLARE(ush, tab_prefix1, 1L<<(BITS-1));
#endif
}UnZipDate;