| /* 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 */ | |
| }; |