Initial revision

1 files changed, 82 insertions, 0 deletions

diff --git a/include/jffs2/mini_inflate.h b/include/jffs2/mini_inflate.h
new file mode 100644
index 000000000..f79aac7c9
--- /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));