| 1 | /* inflate9.h -- internal inflate state definition | 
 
 
 
 
 | 2 | * Copyright (C) 1995-2003 Mark Adler | 
 
 
 
 
 | 3 | * For conditions of distribution and use, see copyright notice in zlib.h | 
 
 
 
 
 | 4 | */ | 
 
 
 
 
 | 5 |  | 
 
 
 
 
 | 6 | /* WARNING: this file should *not* be used by applications. It is | 
 
 
 
 
 | 7 | part of the implementation of the compression library and is | 
 
 
 
 
 | 8 | subject to change. Applications should only use zlib.h. | 
 
 
 
 
 | 9 | */ | 
 
 
 
 
 | 10 |  | 
 
 
 
 
 | 11 | /* Possible inflate modes between inflate() calls */ | 
 
 
 
 
 | 12 | typedef enum { | 
 
 
 
 
 | 13 | TYPE,       /* i: waiting for type bits, including last-flag bit */ | 
 
 
 
 
 | 14 | STORED,     /* i: waiting for stored size (length and complement) */ | 
 
 
 
 
 | 15 | TABLE,      /* i: waiting for dynamic block table lengths */ | 
 
 
 
 
 | 16 | LEN,        /* i: waiting for length/lit code */ | 
 
 
 
 
 | 17 | DONE,       /* finished check, done -- remain here until reset */ | 
 
 
 
 
 | 18 | BAD         /* got a data error -- remain here until reset */ | 
 
 
 
 
 | 19 | } inflate_mode; | 
 
 
 
 
 | 20 |  | 
 
 
 
 
 | 21 | /* | 
 
 
 
 
 | 22 | State transitions between above modes - | 
 
 
 
 
 | 23 |  | 
 
 
 
 
 | 24 | (most modes can go to the BAD mode -- not shown for clarity) | 
 
 
 
 
 | 25 |  | 
 
 
 
 
 | 26 | Read deflate blocks: | 
 
 
 
 
 | 27 | TYPE -> STORED or TABLE or LEN or DONE | 
 
 
 
 
 | 28 | STORED -> TYPE | 
 
 
 
 
 | 29 | TABLE -> LENLENS -> CODELENS -> LEN | 
 
 
 
 
 | 30 | Read deflate codes: | 
 
 
 
 
 | 31 | LEN -> LEN or TYPE | 
 
 
 
 
 | 32 | */ | 
 
 
 
 
 | 33 |  | 
 
 
 
 
 | 34 | /* state maintained between inflate() calls.  Approximately 7K bytes. */ | 
 
 
 
 
 | 35 | struct inflate_state { | 
 
 
 
 
 | 36 | /* sliding window */ | 
 
 
 
 
 | 37 | unsigned char FAR *window;  /* allocated sliding window, if needed */ | 
 
 
 
 
 | 38 | /* dynamic table building */ | 
 
 
 
 
 | 39 | unsigned ncode;             /* number of code length code lengths */ | 
 
 
 
 
 | 40 | unsigned nlen;              /* number of length code lengths */ | 
 
 
 
 
 | 41 | unsigned ndist;             /* number of distance code lengths */ | 
 
 
 
 
 | 42 | unsigned have;              /* number of code lengths in lens[] */ | 
 
 
 
 
 | 43 | code FAR *next;             /* next available space in codes[] */ | 
 
 
 
 
 | 44 | unsigned short lens[320];   /* temporary storage for code lengths */ | 
 
 
 
 
 | 45 | unsigned short work[288];   /* work area for code table building */ | 
 
 
 
 
 | 46 | code codes[ENOUGH];         /* space for code tables */ | 
 
 
 
 
 | 47 | }; |