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inflate9.h
Package: zlib124.zip [view]
Upload User: shengde
Upload Date: 2021-02-21
Package Size: 638k
Code Size: 2k
Category:
Compress-Decompress algrithms
Development Platform:
Visual 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 */
- };