/* $NetBSD: inflate9.h,v 1.1.1.1 2006/01/14 20:10:51 christos Exp $ */ /* 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 */ };