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83 lines
2.8 KiB
C
83 lines
2.8 KiB
C
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/*-------------------------------------------------------------------------
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* Filename: mini_inflate.h
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* Version: $Id: mini_inflate.h,v 1.2 2002/01/17 00:53:20 nyet Exp $
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* Copyright: Copyright (C) 2001, Russ Dill
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* Author: Russ Dill <Russ.Dill@asu.edu>
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* Description: Mini deflate implementation
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*-----------------------------------------------------------------------*/
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/*
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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typedef __SIZE_TYPE__ size;
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#define NO_ERROR 0
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#define COMP_UNKNOWN 1 /* The specififed bytype is invalid */
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#define CODE_NOT_FOUND 2 /* a huffman code in the stream could not be decoded */
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#define TOO_MANY_BITS 3 /* pull_bits was passed an argument that is too
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* large */
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/* This struct represents an entire huffman code set. It has various lookup
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* tables to speed decoding */
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struct huffman_set {
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int bits; /* maximum bit length */
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int num_symbols; /* Number of symbols this code can represent */
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int *lengths; /* The bit length of symbols */
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int *symbols; /* All of the symbols, sorted by the huffman code */
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int *count; /* the number of codes of this bit length */
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int *first; /* the first code of this bit length */
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int *pos; /* the symbol that first represents (in the symbols
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* array) */
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};
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struct bitstream {
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unsigned char *data; /* increments as we move from byte to byte */
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unsigned char bit; /* 0 to 7 */
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void *(*memcpy)(void *, const void *, size);
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unsigned long decoded; /* The number of bytes decoded */
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int error;
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int distance_count[16];
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int distance_first[16];
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int distance_pos[16];
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int distance_lengths[32];
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int distance_symbols[32];
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int code_count[8];
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int code_first[8];
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int code_pos[8];
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int code_lengths[19];
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int code_symbols[19];
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int length_count[16];
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int length_first[16];
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int length_pos[16];
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int length_lengths[288];
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int length_symbols[288];
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struct huffman_set codes;
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struct huffman_set lengths;
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struct huffman_set distance;
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};
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#define NO_COMP 0
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#define FIXED_COMP 1
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#define DYNAMIC_COMP 2
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long decompress_block(unsigned char *dest, unsigned char *source,
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void *(*inflate_memcpy)(void *dest, const void *src, size n));
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