godot/thirdparty/zlib/inflate.h

/* inflate.h -- internal inflate state definition
 * Copyright (C) 1995-2019 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.
 */

/* define NO_GZIP when compiling if you want to disable gzip header and
   trailer decoding by inflate().  NO_GZIP would be used to avoid linking in
   the crc code when it is not needed.  For shared libraries, gzip decoding
   should be left enabled. */
#ifndef NO_GZIP
#define GUNZIP
#endif

/* Possible inflate modes between inflate() calls */
inflate_mode;

/*
    State transitions between above modes -

    (most modes can go to BAD or MEM on error -- not shown for clarity)

    Process header:
        HEAD -> (gzip) or (zlib) or (raw)
        (gzip) -> FLAGS -> TIME -> OS -> EXLEN -> EXTRA -> NAME -> COMMENT ->
                  HCRC -> TYPE
        (zlib) -> DICTID or TYPE
        DICTID -> DICT -> TYPE
        (raw) -> TYPEDO
    Read deflate blocks:
            TYPE -> TYPEDO -> STORED or TABLE or LEN_ or CHECK
            STORED -> COPY_ -> COPY -> TYPE
            TABLE -> LENLENS -> CODELENS -> LEN_
            LEN_ -> LEN
    Read deflate codes in fixed or dynamic block:
                LEN -> LENEXT or LIT or TYPE
                LENEXT -> DIST -> DISTEXT -> MATCH -> LEN
                LIT -> LEN
    Process trailer:
        CHECK -> LENGTH -> DONE
 */

/* State maintained between inflate() calls -- approximately 7K bytes, not
   including the allocated sliding window, which is up to 32K bytes. */
struct inflate_state { … };