1 7a4ee46d 2003-11-23 devnull typedef struct Whack		Whack;
 2 7a4ee46d 2003-11-23 devnull typedef struct Unwhack		Unwhack;
 3 7a4ee46d 2003-11-23 devnull 
 4 7a4ee46d 2003-11-23 devnull enum
 5 7a4ee46d 2003-11-23 devnull {
 6 7a4ee46d 2003-11-23 devnull 	WhackStats	= 8,
 7 7a4ee46d 2003-11-23 devnull 	WhackErrLen	= 64,		/* max length of error message from thwack or unthwack */
 8 7a4ee46d 2003-11-23 devnull 	WhackMaxOff	= 16*1024,	/* max allowed offset */
 9 7a4ee46d 2003-11-23 devnull 
10 7a4ee46d 2003-11-23 devnull 	HashLog		= 14,
11 7a4ee46d 2003-11-23 devnull 	HashSize	= 1<<HashLog,
12 7a4ee46d 2003-11-23 devnull 	HashMask	= HashSize - 1,
13 7a4ee46d 2003-11-23 devnull 
14 7a4ee46d 2003-11-23 devnull 	MinMatch	= 3,		/* shortest match possible */
15 7a4ee46d 2003-11-23 devnull 
16 7a4ee46d 2003-11-23 devnull 	MinDecode	= 8,		/* minimum bits to decode a match or lit; >= 8 */
17 7a4ee46d 2003-11-23 devnull 
18 7a4ee46d 2003-11-23 devnull 	MaxSeqMask	= 8,		/* number of bits in coding block mask */
19 7a4ee46d 2003-11-23 devnull 	MaxSeqStart	= 256		/* max offset of initial coding block */
20 7a4ee46d 2003-11-23 devnull };
21 7a4ee46d 2003-11-23 devnull 
22 7a4ee46d 2003-11-23 devnull struct Whack
23 7a4ee46d 2003-11-23 devnull {
24 7a4ee46d 2003-11-23 devnull 	ushort		begin;			/* time of first byte in hash */
25 7a4ee46d 2003-11-23 devnull 	ushort		hash[HashSize];
26 7a4ee46d 2003-11-23 devnull 	ushort		next[WhackMaxOff];
27 7a4ee46d 2003-11-23 devnull 	uchar		*data;
28 7a4ee46d 2003-11-23 devnull };
29 7a4ee46d 2003-11-23 devnull 
30 7a4ee46d 2003-11-23 devnull struct Unwhack
31 7a4ee46d 2003-11-23 devnull {
32 7a4ee46d 2003-11-23 devnull 	char		err[WhackErrLen];
33 7a4ee46d 2003-11-23 devnull };
34 7a4ee46d 2003-11-23 devnull 
35 7a4ee46d 2003-11-23 devnull void	whackinit(Whack*, int level);
36 7a4ee46d 2003-11-23 devnull void	unwhackinit(Unwhack*);
37 7a4ee46d 2003-11-23 devnull int	whack(Whack*, uchar *dst, uchar *src, int nsrc, ulong stats[WhackStats]);
38 7a4ee46d 2003-11-23 devnull int	unwhack(Unwhack*, uchar *dst, int ndst, uchar *src, int nsrc);
39 7a4ee46d 2003-11-23 devnull 
40 7a4ee46d 2003-11-23 devnull int	whackblock(uchar *dst, uchar *src, int ssize);