Ruby: ext/zlib/zlib-1.2.13/contrib/infback9/inflate9.h Source File

Ruby 3.0.5p211 (2022-11-24 revision ba5cf0f7c52d4d35cc6a173c89eda98ceffa2dcf)

inflate9.h
Go to the documentation of this file.
1/* inflate9.h -- internal inflate state definition
2 * Copyright (C) 1995-2003 Mark Adler
3 * For conditions of distribution and use, see copyright notice in zlib.h
4 */
5
6/* WARNING: this file should *not* be used by applications. It is
7 part of the implementation of the compression library and is
8 subject to change. Applications should only use zlib.h.
9 */
10
11/* Possible inflate modes between inflate() calls */
12 typedef enum {
13 TYPE, /* i: waiting for type bits, including last-flag bit */
14 STORED, /* i: waiting for stored size (length and complement) */
15 TABLE, /* i: waiting for dynamic block table lengths */
16 LEN, /* i: waiting for length/lit code */
17 DONE, /* finished check, done -- remain here until reset */
18 BAD /* got a data error -- remain here until reset */
19} inflate_mode;
20
21/*
22 State transitions between above modes -
23
24 (most modes can go to the BAD mode -- not shown for clarity)
25
26 Read deflate blocks:
27 TYPE -> STORED or TABLE or LEN or DONE
28 STORED -> TYPE
29 TABLE -> LENLENS -> CODELENS -> LEN
30 Read deflate codes:
31 LEN -> LEN or TYPE
32 */
33
34/* state maintained between inflate() calls. Approximately 7K bytes. */
35 struct inflate_state {
36 /* sliding window */
37 unsigned char FAR *window; /* allocated sliding window, if needed */
38 /* dynamic table building */
39 unsigned ncode; /* number of code length code lengths */
40 unsigned nlen; /* number of length code lengths */
41 unsigned ndist; /* number of distance code lengths */
42 unsigned have; /* number of code lengths in lens[] */
43 code FAR *next; /* next available space in codes[] */
44 unsigned short lens[320]; /* temporary storage for code lengths */
45 unsigned short work[288]; /* work area for code table building */
46 code codes[ENOUGH]; /* space for code tables */
47};
inflate_mode
inflate_mode
Definition: inflate9.h:12
TABLE
@ TABLE
Definition: inflate9.h:15
STORED
@ STORED
Definition: inflate9.h:14
DONE
@ DONE
Definition: inflate9.h:17
TYPE
@ TYPE
Definition: inflate9.h:13
BAD
@ BAD
Definition: inflate9.h:18
LEN
@ LEN
Definition: inflate9.h:16
ENOUGH
#define ENOUGH
Definition: inftree9.h:50
code
Definition: inftree9.h:24
inflate_state
Definition: inflate9.h:35
inflate_state::work
unsigned short work[288]
Definition: inflate9.h:45
inflate_state::lens
unsigned short lens[320]
Definition: inflate9.h:44
inflate_state::window
unsigned char FAR * window
Definition: inflate9.h:37
inflate_state::ndist
unsigned ndist
Definition: inflate9.h:41
inflate_state::nlen
unsigned nlen
Definition: inflate9.h:40
inflate_state::have
unsigned have
Definition: inflate9.h:42
inflate_state::ncode
unsigned ncode
Definition: inflate9.h:39
inflate_state::next
code FAR * next
Definition: inflate9.h:43
inflate_state::codes
code codes[ENOUGH]
Definition: inflate9.h:46
FAR
#define FAR
Definition: zconf.h:393