diff options
Diffstat (limited to 'include/jffs2')
| -rw-r--r-- | include/jffs2/compr_rubin.h | 11 | ||||
| -rw-r--r-- | include/jffs2/mini_inflate.h | 82 |
2 files changed, 93 insertions, 0 deletions
diff --git a/include/jffs2/compr_rubin.h b/include/jffs2/compr_rubin.h new file mode 100644 index 0000000..f26f476 --- /dev/null +++ b/include/jffs2/compr_rubin.h @@ -0,0 +1,11 @@ +/* Rubin encoder/decoder header */ +/* work started at : aug 3, 1994 */ +/* last modification : aug 15, 1994 */ +/* $Id: compr_rubin.h,v 1.1 2002/01/16 23:34:32 nyet Exp $ */ + +#define RUBIN_REG_SIZE 16 +#define UPPER_BIT_RUBIN (((long) 1)<<(RUBIN_REG_SIZE-1)) +#define LOWER_BITS_RUBIN ((((long) 1)<<(RUBIN_REG_SIZE-1))-1) + +void dynrubin_decompress(unsigned char *data_in, unsigned char *cpage_out, + unsigned long sourcelen, unsigned long dstlen); diff --git a/include/jffs2/mini_inflate.h b/include/jffs2/mini_inflate.h new file mode 100644 index 0000000..f79aac7 --- /dev/null +++ b/include/jffs2/mini_inflate.h @@ -0,0 +1,82 @@ +/*------------------------------------------------------------------------- + * Filename: mini_inflate.h + * Version: $Id: mini_inflate.h,v 1.2 2002/01/17 00:53:20 nyet Exp $ + * Copyright: Copyright (C) 2001, Russ Dill + * Author: Russ Dill <Russ.Dill@asu.edu> + * Description: Mini deflate implementation + *-----------------------------------------------------------------------*/ +/* + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + * + */ + +typedef __SIZE_TYPE__ size; + +#define NO_ERROR 0 +#define COMP_UNKNOWN 1 /* The specififed bytype is invalid */ +#define CODE_NOT_FOUND 2 /* a huffman code in the stream could not be decoded */ +#define TOO_MANY_BITS 3 /* pull_bits was passed an argument that is too + * large */ + +/* This struct represents an entire huffman code set. It has various lookup + * tables to speed decoding */ +struct huffman_set { + int bits; /* maximum bit length */ + int num_symbols; /* Number of symbols this code can represent */ + int *lengths; /* The bit length of symbols */ + int *symbols; /* All of the symbols, sorted by the huffman code */ + int *count; /* the number of codes of this bit length */ + int *first; /* the first code of this bit length */ + int *pos; /* the symbol that first represents (in the symbols + * array) */ +}; + +struct bitstream { + unsigned char *data; /* increments as we move from byte to byte */ + unsigned char bit; /* 0 to 7 */ + void *(*memcpy)(void *, const void *, size); + unsigned long decoded; /* The number of bytes decoded */ + int error; + + int distance_count[16]; + int distance_first[16]; + int distance_pos[16]; + int distance_lengths[32]; + int distance_symbols[32]; + + int code_count[8]; + int code_first[8]; + int code_pos[8]; + int code_lengths[19]; + int code_symbols[19]; + + int length_count[16]; + int length_first[16]; + int length_pos[16]; + int length_lengths[288]; + int length_symbols[288]; + + struct huffman_set codes; + struct huffman_set lengths; + struct huffman_set distance; +}; + +#define NO_COMP 0 +#define FIXED_COMP 1 +#define DYNAMIC_COMP 2 + +long decompress_block(unsigned char *dest, unsigned char *source, + void *(*inflate_memcpy)(void *dest, const void *src, size n)); |