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