lib/zlib/inflate.h

1 /* inflate.h -- internal inflate state definition
2  * Copyright (C) 1995-2004 Mark Adler
32         TYPE,       /* i: waiting for type bits, including last-flag bit */
33         TYPEDO,     /* i: same, but skip check to exit inflate on new block */
35         COPY,       /* i/o: waiting for input or output to copy stored block */  enumerator
36         TABLE,      /* i: waiting for dynamic block table lengths */
43             MATCH,      /* o: waiting for output space to copy string */
45     CHECK,      /* i: waiting for 32-bit check value */
46     LENGTH,     /* i: waiting for 32-bit length (gzip) */
47     DONE,       /* finished check, done -- remain here until reset */
48     BAD,        /* got a data error -- remain here until reset */
49     MEM,        /* got an inflate() memory error -- remain here until reset */
54     State transitions between above modes -
56     (most modes can go to the BAD or MEM mode -- not shown for clarity)
59         HEAD -> (gzip) or (zlib)
60         (gzip) -> FLAGS -> TIME -> OS -> EXLEN -> EXTRA -> NAME
61         NAME -> COMMENT -> HCRC -> TYPE
62         (zlib) -> DICTID or TYPE
63         DICTID -> DICT -> TYPE
65             TYPE -> STORED or TABLE or LEN or CHECK
66             STORED -> COPY -> TYPE
67             TABLE -> LENLENS -> CODELENS -> LEN
69                 LEN -> LENEXT or LIT or TYPE
70                 LENEXT -> DIST -> DISTEXT -> MATCH -> LEN
71                 LIT -> LEN
73         CHECK -> LENGTH -> DONE
79     int last;                   /* true if processing last block */
84     unsigned long check;        /* protected copy of check value */
85     unsigned long total;        /* protected copy of output count */
96         /* for string and stored block copying */
97     unsigned length;            /* literal or length of data to copy */
98     unsigned offset;            /* distance back to copy string from */