mirror of
https://github.com/autc04/Retro68.git
synced 2024-11-24 23:32:06 +00:00
48 lines
1.9 KiB
C
48 lines
1.9 KiB
C
/* inflate9.h -- internal inflate state definition
|
|
* Copyright (C) 1995-2003 Mark Adler
|
|
* For conditions of distribution and use, see copyright notice in zlib.h
|
|
*/
|
|
|
|
/* WARNING: this file should *not* be used by applications. It is
|
|
part of the implementation of the compression library and is
|
|
subject to change. Applications should only use zlib.h.
|
|
*/
|
|
|
|
/* Possible inflate modes between inflate() calls */
|
|
typedef enum {
|
|
TYPE, /* i: waiting for type bits, including last-flag bit */
|
|
STORED, /* i: waiting for stored size (length and complement) */
|
|
TABLE, /* i: waiting for dynamic block table lengths */
|
|
LEN, /* i: waiting for length/lit code */
|
|
DONE, /* finished check, done -- remain here until reset */
|
|
BAD /* got a data error -- remain here until reset */
|
|
} inflate_mode;
|
|
|
|
/*
|
|
State transitions between above modes -
|
|
|
|
(most modes can go to the BAD mode -- not shown for clarity)
|
|
|
|
Read deflate blocks:
|
|
TYPE -> STORED or TABLE or LEN or DONE
|
|
STORED -> TYPE
|
|
TABLE -> LENLENS -> CODELENS -> LEN
|
|
Read deflate codes:
|
|
LEN -> LEN or TYPE
|
|
*/
|
|
|
|
/* state maintained between inflate() calls. Approximately 7K bytes. */
|
|
struct inflate_state {
|
|
/* sliding window */
|
|
unsigned char FAR *window; /* allocated sliding window, if needed */
|
|
/* dynamic table building */
|
|
unsigned ncode; /* number of code length code lengths */
|
|
unsigned nlen; /* number of length code lengths */
|
|
unsigned ndist; /* number of distance code lengths */
|
|
unsigned have; /* number of code lengths in lens[] */
|
|
code FAR *next; /* next available space in codes[] */
|
|
unsigned short lens[320]; /* temporary storage for code lengths */
|
|
unsigned short work[288]; /* work area for code table building */
|
|
code codes[ENOUGH]; /* space for code tables */
|
|
};
|