1/*	$NetBSD: inflate9.h,v 1.1.1.1 2006/01/14 20:10:51 christos Exp $	*/
2
3/* inflate9.h -- internal inflate state definition
4 * Copyright (C) 1995-2003 Mark Adler
5 * For conditions of distribution and use, see copyright notice in zlib.h
6 */
7
8/* WARNING: this file should *not* be used by applications. It is
9   part of the implementation of the compression library and is
10   subject to change. Applications should only use zlib.h.
11 */
12
13/* Possible inflate modes between inflate() calls */
14typedef enum {
15        TYPE,       /* i: waiting for type bits, including last-flag bit */
16        STORED,     /* i: waiting for stored size (length and complement) */
17        TABLE,      /* i: waiting for dynamic block table lengths */
18            LEN,        /* i: waiting for length/lit code */
19    DONE,       /* finished check, done -- remain here until reset */
20    BAD         /* got a data error -- remain here until reset */
21} inflate_mode;
22
23/*
24    State transitions between above modes -
25
26    (most modes can go to the BAD mode -- not shown for clarity)
27
28    Read deflate blocks:
29            TYPE -> STORED or TABLE or LEN or DONE
30            STORED -> TYPE
31            TABLE -> LENLENS -> CODELENS -> LEN
32    Read deflate codes:
33                LEN -> LEN or TYPE
34 */
35
36/* state maintained between inflate() calls.  Approximately 7K bytes. */
37struct inflate_state {
38        /* sliding window */
39    unsigned char FAR *window;  /* allocated sliding window, if needed */
40        /* dynamic table building */
41    unsigned ncode;             /* number of code length code lengths */
42    unsigned nlen;              /* number of length code lengths */
43    unsigned ndist;             /* number of distance code lengths */
44    unsigned have;              /* number of code lengths in lens[] */
45    code FAR *next;             /* next available space in codes[] */
46    unsigned short lens[320];   /* temporary storage for code lengths */
47    unsigned short work[288];   /* work area for code table building */
48    code codes[ENOUGH];         /* space for code tables */
49};
50