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openwrt-mirror/target/linux/generic-2.4/patches/003-jffs2_compression.patch
Gabor Juhos dfe741470a refresh generic-2.4 patches 
SVN-Revision: 11213
2008-05-19 13:44:11 +00:00

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Index: linux-2.4.35.4/Documentation/Configure.help
===================================================================
--- linux-2.4.35.4.orig/Documentation/Configure.help
+++ linux-2.4.35.4/Documentation/Configure.help
@@ -17580,6 +17580,32 @@ CONFIG_JFFS2_FS_DEBUG
If reporting bugs, please try to have available a full dump of the
messages at debug level 1 while the misbehaviour was occurring.
+ARMLIB compression support for BBC (EXPERIMENTAL)
+CONFIG_JFFS2_BBC_ARMLIB
+ This enables ARMLIB support for BBC.
+
+LZO1X-* compression support for BBC (EXPERIMENTAL)
+CONFIG_JFFS2_BBC_LZO
+ This enables LZO1X-1 and LZO1X-999 support for BBC. (fast & good
+ compressor, beats ZLIB in everything)
+
+LZARI compression support for BBC (EXPERIMENTAL)
+CONFIG_JFFS2_BBC_LZARI
+ This enables LempelZiv-Storer-Szymanski compression for BBC with
+ additional arithmetic coding (damn slow, but best compresor).
+
+LZHD compression support for BBC (EXPERIMENTAL)
+CONFIG_JFFS2_BBC_LZHD
+ This enables LempelZiv-Storer-Szymanski compression for BBC with
+ additional dynamic Huffman coding (a little faster than LZARI, and
+ it's compression ratio is a little worse than LZARI's)
+
+LZSS compression support for BBC (EXPERIMENTAL)
+CONFIG_JFFS2_BBC_LZSS
+ This enables simple LempelZiv-Storer-Szymanski compression for BBC
+ (faster than LZHD, and, and has a not-so-good compression ratio,
+ was included just for testing)
+
JFFS stats available in /proc filesystem
CONFIG_JFFS_PROC_FS
Enabling this option will cause statistics from mounted JFFS file systems
Index: linux-2.4.35.4/fs/Config.in
===================================================================
--- linux-2.4.35.4.orig/fs/Config.in
+++ linux-2.4.35.4/fs/Config.in
@@ -50,6 +50,12 @@ dep_tristate 'Journalling Flash File Sys
if [ "$CONFIG_JFFS2_FS" = "y" -o "$CONFIG_JFFS2_FS" = "m" ] ; then
int 'JFFS2 debugging verbosity (0 = quiet, 2 = noisy)' CONFIG_JFFS2_FS_DEBUG 0
fi
+dep_mbool ' ARMLIB compression support for BBC (EXPERIMENTAL)' CONFIG_JFFS2_BBC_ARMLIB $CONFIG_JFFS2_FS
+dep_mbool ' LZO1X-* compression support for BBC (EXPERIMENTAL)' CONFIG_JFFS2_BBC_LZO $CONFIG_JFFS2_FS
+dep_mbool ' LZARI compression support for BBC (EXPERIMENTAL)' CONFIG_JFFS2_BBC_LZARI $CONFIG_JFFS2_FS
+dep_mbool ' LZHD compression support for BBC (EXPERIMENTAL)' CONFIG_JFFS2_BBC_LZHD $CONFIG_JFFS2_FS
+dep_mbool ' LZSS compression support for BBC (EXPERIMENTAL)' CONFIG_JFFS2_BBC_LZSS $CONFIG_JFFS2_FS
+
tristate 'Compressed ROM file system support' CONFIG_CRAMFS
tristate 'Squashed file system support' CONFIG_SQUASHFS
if [ "$CONFIG_SQUASHFS" = "y" -o "$CONFIG_SQUASHFS" = "m" ] ; then
Index: linux-2.4.35.4/fs/jffs2/Config.in.bbc.inc
===================================================================
--- /dev/null
+++ linux-2.4.35.4/fs/jffs2/Config.in.bbc.inc
@@ -0,0 +1,5 @@
+dep_mbool ' ARMLIB compression support for BBC (EXPERIMENTAL)' CONFIG_JFFS2_BBC_ARMLIB $CONFIG_JFFS2_FS
+dep_mbool ' LZO1X-* compression support for BBC (EXPERIMENTAL)' CONFIG_JFFS2_BBC_LZO $CONFIG_JFFS2_FS
+dep_mbool ' LZARI compression support for BBC (EXPERIMENTAL)' CONFIG_JFFS2_BBC_LZARI $CONFIG_JFFS2_FS
+dep_mbool ' LZHD compression support for BBC (EXPERIMENTAL)' CONFIG_JFFS2_BBC_LZHD $CONFIG_JFFS2_FS
+dep_mbool ' LZSS compression support for BBC (EXPERIMENTAL)' CONFIG_JFFS2_BBC_LZSS $CONFIG_JFFS2_FS
Index: linux-2.4.35.4/fs/jffs2/Configure.help.bbc.inc
===================================================================
--- /dev/null
+++ linux-2.4.35.4/fs/jffs2/Configure.help.bbc.inc
@@ -0,0 +1,25 @@
+ARMLIB compression support for BBC (EXPERIMENTAL)
+CONFIG_JFFS2_BBC_ARMLIB
+ This enables ARMLIB support for BBC.
+
+LZO1X-* compression support for BBC (EXPERIMENTAL)
+CONFIG_JFFS2_BBC_LZO
+ This enables LZO1X-1 and LZO1X-999 support for BBC. (fast & good
+ compressor, beats ZLIB in everything)
+
+LZARI compression support for BBC (EXPERIMENTAL)
+CONFIG_JFFS2_BBC_LZARI
+ This enables LempelZiv-Storer-Szymanski compression for BBC with
+ additional arithmetic coding (damn slow, but best compresor).
+
+LZHD compression support for BBC (EXPERIMENTAL)
+CONFIG_JFFS2_BBC_LZHD
+ This enables LempelZiv-Storer-Szymanski compression for BBC with
+ additional dynamic Huffman coding (a little faster than LZARI, and
+ it's compression ratio is a little worse than LZARI's)
+
+LZSS compression support for BBC (EXPERIMENTAL)
+CONFIG_JFFS2_BBC_LZSS
+ This enables simple LempelZiv-Storer-Szymanski compression for BBC
+ (faster than LZHD, and, and has a not-so-good compression ratio,
+ was included just for testing)
Index: linux-2.4.35.4/fs/jffs2/Kconfig.bbc.inc
===================================================================
--- /dev/null
+++ linux-2.4.35.4/fs/jffs2/Kconfig.bbc.inc
@@ -0,0 +1,40 @@
+config JFFS2_BBC_ARMLIB
+ bool "ARMLIB compression support for BBC (EXPERIMENTAL)"
+ depends on JFFS2_FS && EXPERIMENTAL
+ default y
+ help
+ This enables ARMLIB support for BBC.
+
+config JFFS2_BBC_LZO
+ bool "LZO1X-* compression support for BBC (EXPERIMENTAL)"
+ depends on JFFS2_FS && EXPERIMENTAL
+ default y
+ help
+ This enables LZO1X-1 and LZO1X-999 support for BBC. (fast & good
+ compressor)
+
+config JFFS2_BBC_LZARI
+ bool "LZARI compression support for BBC (EXPERIMENTAL)"
+ depends on JFFS2_FS && EXPERIMENTAL
+ default y
+ help
+ This enables LempelZiv-Storer-Szymanski compression for BBC with
+ additional arithmetic coding (damn slow, but best compresor).
+
+config JFFS2_BBC_LZHD
+ bool "LZHD compression support for BBC (EXPERIMENTAL)"
+ depends on JFFS2_FS && EXPERIMENTAL
+ default y
+ help
+ This enables LempelZiv-Storer-Szymanski compression for BBC with
+ additional dynamic Huffman coding (a little faster than LZARI, and
+ it's compression ratio is a little worse than LZARI's)
+
+config JFFS2_BBC_LZSS
+ bool "LZSS compression support for BBC (EXPERIMENTAL)"
+ depends on JFFS2_FS && EXPERIMENTAL
+ default y
+ help
+ This enables simple LempelZiv-Storer-Szymanski compression for BBC
+ (faster than LZHD, and, and has a not-so-good compression ratio,
+ was included just for testing)
Index: linux-2.4.35.4/fs/jffs2/Makefile
===================================================================
--- linux-2.4.35.4.orig/fs/jffs2/Makefile
+++ linux-2.4.35.4/fs/jffs2/Makefile
@@ -10,9 +10,23 @@
# Note 2! The CFLAGS definitions are now in the main makefile...
+JFFS2_BBC_KERNEL_OBJS-y = jffs2_bbc_framework.o jffs2_bbc_fs.o
+
+JFFS2_BBC_KERNEL_OBJS-$(CONFIG_JFFS2_BBC_ARMLIB) += jffs2_bbc_armlib_comp.o
+JFFS2_BBC_KERNEL_OBJS-$(CONFIG_JFFS2_BBC_LZO) += jffs2_bbc_lzo_comp.o
+JFFS2_BBC_KERNEL_OBJS-$(CONFIG_JFFS2_BBC_LZSS) += jffs2_bbc_lzss_comp.o
+JFFS2_BBC_KERNEL_OBJS-$(CONFIG_JFFS2_BBC_LZARI) += jffs2_bbc_lzari_comp.o
+JFFS2_BBC_KERNEL_OBJS-$(CONFIG_JFFS2_BBC_LZHD) += jffs2_bbc_lzhd_comp.o
+
+JFFS2_BBC_KERNEL_OBJS := $(JFFS2_BBC_KERNEL_OBJS-y)
+
+JFFS2_BBC_MKFS_OBJS = jffs2_bbc_mkfs.o jffs2_bbc_framework.o jffs2_bbc_armlib_comp.o jffs2_bbc_lzo_comp.o\
+ jffs2_bbc_lzss_comp.o jffs2_bbc_lzari_comp.o jffs2_bbc_lzhd_comp.o
+
COMPR_OBJS := compr.o compr_rubin.o compr_rtime.o pushpull.o \
compr_zlib.o
JFFS2_OBJS := dir.o file.o ioctl.o nodelist.o malloc.o \
+ $(JFFS2_BBC_KERNEL_OBJS) \
read.o nodemgmt.o readinode.o super.o write.o scan.o gc.o \
symlink.o build.o erase.o background.o
Index: linux-2.4.35.4/fs/jffs2/Makefile.bbc.inc
===================================================================
--- /dev/null
+++ linux-2.4.35.4/fs/jffs2/Makefile.bbc.inc
@@ -0,0 +1,12 @@
+JFFS2_BBC_KERNEL_OBJS-y = jffs2_bbc_framework.o jffs2_bbc_fs.o
+
+JFFS2_BBC_KERNEL_OBJS-$(CONFIG_JFFS2_BBC_ARMLIB) += jffs2_bbc_armlib_comp.o
+JFFS2_BBC_KERNEL_OBJS-$(CONFIG_JFFS2_BBC_LZO) += jffs2_bbc_lzo_comp.o
+JFFS2_BBC_KERNEL_OBJS-$(CONFIG_JFFS2_BBC_LZSS) += jffs2_bbc_lzss_comp.o
+JFFS2_BBC_KERNEL_OBJS-$(CONFIG_JFFS2_BBC_LZARI) += jffs2_bbc_lzari_comp.o
+JFFS2_BBC_KERNEL_OBJS-$(CONFIG_JFFS2_BBC_LZHD) += jffs2_bbc_lzhd_comp.o
+
+JFFS2_BBC_KERNEL_OBJS := $(JFFS2_BBC_KERNEL_OBJS-y)
+
+JFFS2_BBC_MKFS_OBJS = jffs2_bbc_mkfs.o jffs2_bbc_framework.o jffs2_bbc_armlib_comp.o jffs2_bbc_lzo_comp.o\
+ jffs2_bbc_lzss_comp.o jffs2_bbc_lzari_comp.o jffs2_bbc_lzhd_comp.o
Index: linux-2.4.35.4/fs/jffs2/compr_zlib.c
===================================================================
--- linux-2.4.35.4.orig/fs/jffs2/compr_zlib.c
+++ linux-2.4.35.4/fs/jffs2/compr_zlib.c
@@ -85,7 +85,7 @@ void jffs2_zlib_exit(void)
vfree(inflate_workspace);
}
-int zlib_compress(unsigned char *data_in, unsigned char *cpage_out,
+int jffs2_zlib_compress2(unsigned char *data_in, unsigned char *cpage_out,
__u32 *sourcelen, __u32 *dstlen)
{
z_stream strm;
@@ -145,7 +145,7 @@ int zlib_compress(unsigned char *data_in
return 0;
}
-void zlib_decompress(unsigned char *data_in, unsigned char *cpage_out,
+void jffs2_zlib_decompress2(unsigned char *data_in, unsigned char *cpage_out,
__u32 srclen, __u32 destlen)
{
z_stream strm;
@@ -175,3 +175,19 @@ void zlib_decompress(unsigned char *data
zlib_inflateEnd(&strm);
up(&inflate_sem);
}
+
+extern int jffs2_zlib_compress(unsigned char *data_in, unsigned char *cpage_out, __u32 * sourcelen, __u32 * dstlen);
+extern void jffs2_zlib_decompress(unsigned char *data_in, unsigned char *cpage_out, __u32 srclen, __u32 destlen);
+
+int zlib_compress(unsigned char *data_in, unsigned char *cpage_out,
+ __u32 *sourcelen, __u32 *dstlen)
+{
+ return jffs2_zlib_compress(data_in,cpage_out,sourcelen,dstlen);
+}
+
+void zlib_decompress(unsigned char *data_in, unsigned char *cpage_out,
+ __u32 srclen, __u32 destlen)
+{
+ jffs2_zlib_decompress(data_in,cpage_out,srclen,destlen);
+}
+
Index: linux-2.4.35.4/fs/jffs2/file.c
===================================================================
--- linux-2.4.35.4.orig/fs/jffs2/file.c
+++ linux-2.4.35.4/fs/jffs2/file.c
@@ -35,6 +35,7 @@
*
*/
+#include "jffs2_bbc_framework.h" /**BBC**/
#include <linux/kernel.h>
#include <linux/mtd/compatmac.h> /* for min() */
#include <linux/slab.h>
@@ -459,6 +460,7 @@ int jffs2_commit_write (struct file *fil
comprbuf = kmalloc(cdatalen, GFP_KERNEL);
if (comprbuf) {
+ jffs2_bbc_model_set_act_sb(c); /**BBC**/
comprtype = jffs2_compress(page_address(pg)+ (file_ofs & (PAGE_CACHE_SIZE-1)), comprbuf, &datalen, &cdatalen);
}
if (comprtype == JFFS2_COMPR_NONE) {
Index: linux-2.4.35.4/fs/jffs2/gc.c
===================================================================
--- linux-2.4.35.4.orig/fs/jffs2/gc.c
+++ linux-2.4.35.4/fs/jffs2/gc.c
@@ -35,6 +35,7 @@
*
*/
+#include "jffs2_bbc_framework.h" /**BBC**/
#include <linux/kernel.h>
#include <linux/mtd/mtd.h>
#include <linux/slab.h>
@@ -651,6 +652,7 @@ static int jffs2_garbage_collect_dnode(s
writebuf = pg_ptr + (offset & (PAGE_CACHE_SIZE -1));
if (comprbuf) {
+ jffs2_bbc_model_set_act_sb(c); /**BBC**/
comprtype = jffs2_compress(writebuf, comprbuf, &datalen, &cdatalen);
}
if (comprtype) {
Index: linux-2.4.35.4/fs/jffs2/hpatch
===================================================================
--- /dev/null
+++ linux-2.4.35.4/fs/jffs2/hpatch
@@ -0,0 +1,191 @@
+#!/usr/bin/perl
+# A patch-like utility
+# Designed for patching different version of jffs2 with the same hpatch file
+#
+# Copyright (C) 2004, Ferenc Havasi
+#
+# 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.
+
+$filename_tmp1="file1.tmp";
+$filename_tmp2="file2.tmp";
+
+$filename_in="";
+$filename_out=$filename_tmp1;
+$filename_cnt=0;
+
+# Modes:
+# 0: expecting =
+# 1: normal_cmd
+# 2: skip until =
+# 3: expecting F (first state)
+$mode=3;
+
+%rules = ();
+
+sub file_end {
+ if (($mode!=2)&&($modified==1)) {
+ while (<SRC>) {
+ print DST $_;
+ }
+ close(SRC);
+ close(DST);
+ if ($cmd_name ne "") { $rules{"$cmd_name"}=1; }
+ $filename_result=$filename_out;
+ if ($filename_result ne $filename_in_save) {
+ open(RES,"<$filename_result") or die "Cannot open $filename_result.\n";
+ open(DST,">$filename_in_save") or die "Cannot open $filename_in_save.\n";
+ while (<RES>) {
+ print DST $_;
+ }
+ close(DST);
+ close(RES);
+ }
+ unlink($filename_tmp1) && unlink($filename_tmp2);
+ }
+ else {
+ close(SRC);
+ close(DST);
+ $filename_result=$filename_in;
+ if ($filename_result ne $filename_in_save) {
+ open(RES,"<$filename_result") or die "Cannot open $filename_result.\n";
+ open(DST,">$filename_in_save") or die "Cannot open $filename_in_save.\n";
+ while (<RES>) {
+ print DST $_;
+ }
+ close(DST);
+ close(RES);
+ }
+ unlink($filename_tmp1);
+ }
+ $modified=0;
+ foreach $rulename (keys %rules) {
+ if ($rules{"$rulename"}==0) { print(STDERR "On $filename_in_save error applying rule $rulename.\n"); }
+ }
+ %rules = ();
+}
+
+if ($#ARGV<0) {
+ print ("usage: hpatch hpatch_file\n");
+ exit;
+}
+
+open(CMD,"<$ARGV[0]") or die "Cannot open $ARGV[0].\n";
+$cmd_linenum=0;
+
+while (chomp($cmd_line=<CMD>)) {
+ $cmd_linenum++;
+ if ($cmd_line eq "") {next;}
+ #$cmd_line =~ s/\#.*//;
+ $cmd_line =~ s/\ *$//;
+ if ($cmd_line eq "") {next;}
+ if ($cmd_line =~ /^F(.*)/) {
+ $tmp_filename_in=$1;
+ if ($mode!=3) {
+ file_end();
+ }
+ $filename_in=$tmp_filename_in;
+ $filename_in_save=$filename_in;
+ open(SRC,"<$filename_in") or die "Cannot open $filename_in.\n";
+ open(DST,">$filename_out") or die "Cannot open $filename_out.\n";;
+ $modified=0;
+ $mode=0;
+ next;
+ }
+ if ($mode==3) {die "error: F expression expected in line $cmd_linenum\n";}
+ if ($cmd_line =~ /^=(.*)/) {
+ $tmp_cmd_name=$1;
+ if (($mode!=2)&&($modified==1)) {
+ while (<SRC>) {
+ print DST $_;
+ }
+ close(SRC);
+ close(DST);
+ if (($cmd_name ne "")) {$rules{"$cmd_name"}=1;};
+ $filename_cnt++;
+ if ($filename_cnt%2==1) {
+ $filename_in=$filename_tmp1;
+ $filename_out=$filename_tmp2;
+ }
+ else {
+ $filename_in=$filename_tmp2;
+ $filename_out=$filename_tmp1;
+ }
+ }
+ else {
+ close(SRC);
+ close(DST);
+ }
+ $mode=1;
+ $cmd_name=$tmp_cmd_name;
+ if (($cmd_name ne "")) {
+ if ($rules{"$cmd_name"}==1) {
+ $mode=2;
+ }
+ else {
+ $rules{"$cmd_name"}=0;
+ }
+ }
+ open(SRC,"<$filename_in") or die "Cannot open $filename_in.\n";
+ open(DST,">$filename_out") or die "Cannot open $filename_out.\n";
+ $modified=0;
+ next;
+ }
+ if ($mode == 0) {die "error: = expression expected in line $cmd_linenum\n";}
+ if ($mode == 2) {next;}
+ if ($cmd_line =~ /^!(.*)/) {
+ print "$1\n";
+ $modified=1;
+ next;
+ }
+ if ($cmd_line =~ /^\?(.*)/) {
+ $search_str=$1;
+ $found=0;
+ while (<SRC>) {
+ print DST $_;
+ if (index($_,$search_str)>=0) {$found=1; last;}
+ }
+ if ($found==0) { $mode=2; }
+ next;
+ }
+ if ($cmd_line =~ /^\+(.*)/) {
+ print DST "$1\n";
+ $modified=1;
+ next;
+ }
+ if ($cmd_line =~ /^\-(.*)/) {
+ $search_str=$1;
+ $found=0;
+ while (<SRC>) {
+ if (index($_,$search_str)>=0) {$saved_line=$_; $found=1; $modified=1; last;}
+ print DST $_;
+ }
+ if ($found==0) { $mode=2; }
+ next;
+ }
+ if ($cmd_line =~ /^i(.*)/) {
+ $filename_inc=$1;
+ open(INCSRC,"<$filename_inc") or die "Cannot open $filename_inc.\n";
+ while (<INCSRC>) {
+ print DST $_;
+ }
+ next;
+ }
+ if ($cmd_line =~ /^I/) {
+ print DST $saved_line;
+ next;
+ }
+}
+file_end();
+close(CMD);
Index: linux-2.4.35.4/fs/jffs2/jffs2_bbc_armlib_comp.c
===================================================================
--- /dev/null
+++ linux-2.4.35.4/fs/jffs2/jffs2_bbc_armlib_comp.c
@@ -0,0 +1,2224 @@
+/*
+ * JFFS2-BBC: armlib compressor plugin
+ *
+ * $Id: 301-jffs-compression,v 1.1 2005/03/26 10:33:31 wbx Exp $
+ *
+ * Copyright (C) 2004, Ferenc Havasi & Tamas Gergely
+ *
+ * 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.
+ *
+ */
+
+#include "jffs2_bbc_framework.h"
+
+#ifdef __KERNEL__
+#include <linux/string.h>
+#else
+#include <string.h>
+#endif
+
+//ORIGIN: include/DataStructures/TypeDefs.h
+
+/*******************************************************************************
+* FILE: TypeDefs.h
+* AUTHOR: Tam<61>s Gergely
+* MODIFIED: $Id: 301-jffs-compression,v 1.1 2005/03/26 10:33:31 wbx Exp $
+*******************************************************************************/
+
+#ifndef TYPEDEFS_H
+#define TYPEDEFS_H
+
+#pragma pack(4)
+
+#ifndef bool
+#define bool char
+#define true 1
+#define false 0
+#endif
+
+#ifndef u8
+#define u8 unsigned char
+#endif
+#ifndef u16
+#define u16 unsigned short
+#endif
+#ifndef u32
+#define u32 unsigned long
+#endif
+#ifndef s8
+#define s8 signed char
+#endif
+#ifndef s16
+#define s16 signed short
+#endif
+#ifndef s32
+#define s32 signed long
+#endif
+
+typedef struct
+{
+ u32 capacity;
+ u32 size;
+ u32 alloc_size;
+ void *ptr;
+} vector;
+
+#define VECTOR_P_END(vct) ((void*)(((char*)((vct)->ptr)) + (vct)->size))
+#define VECTOR_S_END(vct) ((void*)(((char*)((vct).ptr)) + (vct).size))
+
+static void vector_clear(vector *);
+#ifdef JFFS2_BBC_ARMLIB_MODELGEN
+static void vector_reset(vector *);
+static void vector_clr_ptr(vector *);
+static void vector_add_u8(vector *, u8);
+static void vector_add_u16(vector *, u16);
+static void vector_add_u32(vector *, u32);
+static void vector_add_s8(vector *, s8);
+static void vector_add_s16(vector *, s16);
+static void vector_add_s32(vector *, s32);
+static void vector_add_ptr(vector *, void *);
+static void vector_concat(vector *, vector *);
+#endif
+
+#endif
+
+//ORIGIN: include/DataStructures/DataTypes.h
+
+/*******************************************************************************
+* FILE: DataTypes.h
+* AUTHOR: Tam<61>s Gergely
+* MODIFIED: $Id: 301-jffs-compression,v 1.1 2005/03/26 10:33:31 wbx Exp $
+*******************************************************************************/
+
+#ifndef DATATYPES_H
+#define DATATYPES_H
+
+//#include "DataStructures/TypeDefs.h"
+
+typedef u16 THUMB_DataType;
+typedef u32 ARM_DataType;
+typedef u8 TokenType;
+typedef u8 PredictorType;
+typedef u8 *ProbDist;
+
+typedef vector RawData;
+typedef vector RawBlocks;
+typedef vector TokenStream;
+typedef vector TokenBlocks;
+typedef vector LatType;
+
+#define THUMB_DATA_LENGTH 16
+#define ARM_DATA_LENGTH 32
+#define TOKEN_LENGTH 8
+#define TOKEN_MAXVALUE 0xff
+#define PREDICTOR_LENGTH 8
+#define PREDICTOR_MAXVALUE 0xff
+
+#endif
+
+//ORIGIN: include/DataStructures/BitVector.h
+
+/*******************************************************************************
+* FILE: BitVector.h
+* AUTHOR: Tam<61>s Gergely
+* MODIFIED: $Id: 301-jffs-compression,v 1.1 2005/03/26 10:33:31 wbx Exp $
+*******************************************************************************/
+
+#ifndef BITVECTOR_H
+#define BITVECTOR_H
+
+//#include "DataStructures/TypeDefs.h"
+
+typedef vector BitBlocks;
+
+#pragma pack(4)
+
+typedef struct
+{
+ u32 freebits;
+ u32 capacity;
+ u32 size;
+ u8 *base;
+ u8 *ptr;
+} BitVector;
+
+#ifdef JFFS2_BBC_ARMLIB_MODELGEN
+static void bitblocks_clear(BitBlocks *);
+static void bitvector_clear(BitVector *);
+static void bitvector_W_reset(BitVector *);
+static void bitvector_W_add0(BitVector *);
+static void bitvector_W_add1(BitVector *);
+static void bitvector_W_concat_b(BitVector *, BitVector *);
+static void bitvector_W_concat_v(BitVector *, vector *);
+static void bitvector_W_flush(BitVector *);
+static void bitvector_R_reset(BitVector *);
+static u8 bitvector_R_get1(BitVector *);
+static u8 bitvector_R_get8(BitVector *);
+#endif
+
+#define BITVECTOR_P_END(bv) ((void*)(((bv)->base)+((bv)->size)))
+#define BITVECTOR_S_END(bv) ((void*)( ((bv).base)+ ((bv).size)))
+#define BITVECTOR_SKIP(bv,num) ((bv)->ptr) += (num)
+
+#endif
+
+//ORIGIN: include/DataStructures/DecisionTree.h
+
+/*******************************************************************************
+* FILE: DecisionTree.h
+* AUTHOR: Tam<61>s Gergely
+* MODIFIED: $Id: 301-jffs-compression,v 1.1 2005/03/26 10:33:31 wbx Exp $
+*******************************************************************************/
+
+#ifndef DECISIONTREE_H
+#define DECISIONTREE_H
+
+//#include "DataStructures/DataTypes.h"
+
+#pragma pack(4)
+
+#define TREENODETYPE_NULLNODE 0
+#define TREENODETYPE_NODE_BINARY_EQ 1
+#define TREENODETYPE_LEAF_P 2
+#define TREENODETYPE_LEAF_C 3
+#define TREENODETYPE_NODE_BINARY_LT 5
+#define TREENODETYPE_IS_NODE(n) (((n) == TREENODETYPE_NODE_BINARY_EQ) || \
+ ((n) == TREENODETYPE_NODE_BINARY_LT))
+#define TREENODETYPE_IS_NODE_BINARY(n) (((n) == TREENODETYPE_NODE_BINARY_EQ) || \
+ ((n) == TREENODETYPE_NODE_BINARY_LT))
+
+#define TREENODETYPE_IS_LEAF(n) (((n) == TREENODETYPE_LEAF_P) || \
+ ((n) == TREENODETYPE_LEAF_C))
+
+
+#define TREE_SUBTREE_RELATION_LEFT_EQ !=
+#define TREE_SUBTREE_RELATION_RIGHT_EQ ==
+#define TREE_SUBTREE_RELATION_LEFT_LT <
+#define TREE_SUBTREE_RELATION_RIGHT_LT >=
+
+#define GET_NODE_PTR_TYPE(n) (((TreeNodeDummy*)(n))->type)
+
+typedef struct
+{
+ u8 type;
+} TreeNodeDummy;
+
+typedef struct
+{
+ u8 type; // [TREENODETYPE_NODE_BINARY]
+ u8 attribute;
+ PredictorType value;
+ void *left;
+ void *right;
+} TreeNodeBinary;
+
+typedef struct
+{
+ u8 type; // [TREENODETYPE_LEAF_P]
+ u16 pairs;
+ PredictorType *probabilities;
+} TreeLeafP;
+
+typedef struct
+{
+ u8 type; // [TREENODETYPE_LEAF_C]
+ PredictorType predicted_class;
+} TreeLeafC;
+
+typedef struct
+{
+ u32 high;
+ u32 low;
+ u32 max;
+} ProbabilityType;
+
+
+typedef struct
+{
+ void *root;
+ u16 number_of_classes;
+ u16 number_of_predictors;
+ PredictorType *predictor_max_values;
+} DecisionTree;
+
+#ifdef JFFS2_BBC_ARMLIB_MODELGEN
+static void decisiontree_delete(DecisionTree *);
+static void decisiontree_get_probability_for_token(void *, PredictorType *, TokenType, ProbabilityType *);
+static TokenType decisiontree_get_token_for_range(void *, PredictorType *, u32, u32, ProbabilityType *);
+#endif
+
+#endif
+
+//ORIGIN: include/DataStructures/PredictorTable.h
+
+/*******************************************************************************
+* FILE: PredictorTable.h
+* AUTHOR: Tam<61>s Gergely
+* MODIFIED: $Id: 301-jffs-compression,v 1.1 2005/03/26 10:33:31 wbx Exp $
+*******************************************************************************/
+
+#ifndef PREDICTORTABLE_H
+#define PREDICTORTABLE_H
+
+//#include "DataStructures/TypeDefs.h"
+//#include "DataStructures/DataTypes.h"
+////#include "DataStructures/Filter.h"
+////#include "DataStructures/Converter.h"
+////#include "DataStructures/Manipulator.h"
+
+#define NUMBER_OF_PREDICTORS_ARM 17
+
+#ifndef __KERNEL__
+#define NUMBER_OF_PREDICTORS_TXT 2
+#else
+#undef TXT_TOKENS
+#endif // __KERNEL__
+
+#ifdef TXT_TOKENS
+#define NUMBER_OF_PREDICTORS NUMBER_OF_PREDICTORS_TXT
+#define predictortable_reset predictortable_resetTXT
+#define predictortable_update predictortable_updateTXT
+#define predictortable_minvalue predictortable_minvalueTXT
+#define predictortable_maxvalue predictortable_maxvalueTXT
+#else
+#define NUMBER_OF_PREDICTORS NUMBER_OF_PREDICTORS_ARM
+#define predictortable_reset predictortable_resetARM
+#define predictortable_update predictortable_updateARM
+#define predictortable_minvalue predictortable_minvalueARM
+#define predictortable_maxvalue predictortable_maxvalueARM
+#endif
+
+
+#pragma pack(4)
+
+typedef struct
+{
+ PredictorType *predictors;
+} PredictorTable;
+
+#ifdef JFFS2_BBC_ARMLIB_MODELGEN
+static void predictortable_clear(PredictorTable *);
+static void predictortable_free(PredictorTable *);
+static void predictortable_resetARM(PredictorTable *);
+static void predictortable_updateARM(PredictorTable *, TokenType);
+static PredictorType predictortable_minvalueARM(PredictorTable *, u32);
+static PredictorType predictortable_maxvalueARM(PredictorTable *, u32);
+#endif
+
+#ifndef __KERNEL__
+/*
+static void predictortable_resetTXT(PredictorTable *);
+static void predictortable_updateTXT(PredictorTable *, TokenType);
+static PredictorType predictortable_minvalueTXT(PredictorTable *, u32);
+static PredictorType predictortable_maxvalueTXT(PredictorTable *, u32);
+*/
+#endif // __KERNEL__
+
+#endif
+
+//ORIGIN: include/DataStructures/ipack_model.h
+
+/*******************************************************************************
+* FILE: ipack_model.h
+* AUTHOR: Tam<61>s Gergely
+* MODIFIED: $Id: 301-jffs-compression,v 1.1 2005/03/26 10:33:31 wbx Exp $
+*******************************************************************************/
+
+#ifndef IPACK_MODEL_H
+#define IPACK_MODEL_H
+
+//#include "DataStructures/DataTypes.h"
+//#include "DataStructures/DecisionTree.h"
+//#include "DataStructures/PredictorTable.h"
+
+#define PROBABILITY_SHIFT 12
+#define PROBABILITY_MAX 0x00001000l
+
+#define NUMBER_OF_TOKENS_ARM 16
+#define NUMBER_OF_TOKENS_PER_INSTRUCTION_ARM 8
+
+#ifndef __KERNEL__
+#define NUMBER_OF_TOKENS_TXT 256
+#define NUMBER_OF_TOKENS_PER_INSTRUCTION_TXT 4
+#else
+#undef TXT_TOKENS
+#endif // __KERNEL__
+
+#ifdef TXT_TOKENS
+#define NUMBER_OF_TOKENS NUMBER_OF_TOKENS_TXT
+#define NUMBER_OF_TOKENS_PER_INSTRUCTION NUMBER_OF_TOKENS_PER_INSTRUCTION_TXT
+#else
+#define NUMBER_OF_TOKENS NUMBER_OF_TOKENS_ARM
+#define NUMBER_OF_TOKENS_PER_INSTRUCTION NUMBER_OF_TOKENS_PER_INSTRUCTION_ARM
+#endif
+
+#pragma pack(4)
+
+/*
+ Data structure of an internal node of the tree
+*/
+typedef struct
+{
+ PredictorType *attribute_ptr;
+ u32 value; // PredictorType
+ void *right_child_ptr;
+} ipack_treenodeBin;
+/*
+ Data structure of a leaf with probabilities
+*/
+typedef struct
+{
+ u16 probabilities[0]; // PredictorType[0]
+} ipack_treeleafP;
+/*
+ Data structure of a leaf with class prediction
+*/
+typedef struct
+{
+ PredictorType predicted_class; // PredictorType
+} ipack_treeleafC;
+/*
+ Possible data structures of a tree node
+*/
+typedef union
+{
+ ipack_treenodeBin nodeBin;
+ ipack_treeleafP leafP;
+ ipack_treeleafC leafC;
+} ipack_node_data;
+/*
+ Tree node
+*/
+typedef struct
+{
+ u32 type; // u8
+ ipack_node_data data; // ipack_node_data
+} ipack_nodetype;
+/*
+ Nullnode
+*/
+typedef struct
+{
+ u32 type;
+ u16 probabilities[NUMBER_OF_TOKENS];
+} ipack_nullnode;
+/*
+ Model for ipack project
+*/
+typedef struct
+{
+ char ID[4]; // char[4]
+ char block_sign[4]; // only the first 2 are used!
+ void *tree_root_ptr; // void*
+ void *tree_code; // generated ARM code
+ PredictorType *predictors_ptr; // PredictorType*
+ ipack_nullnode nullnode;
+} ipack_model_type;
+
+typedef struct
+{
+ u32 high;
+ u32 low;
+} ipack_probability_type;
+
+
+static void ipack_model_get_probability_for_token(ipack_nodetype *, TokenType, ipack_probability_type *);
+static TokenType ipack_model_get_token_for_range(ipack_nodetype *, u32, u32, ipack_probability_type *);
+/*void ipack_model_predictortable_reset (PredictorType*);
+void ipack_model_predictortable_update (PredictorType*, TokenType);*/
+
+#ifndef __KERNEL__
+/*static void ipack_model_printinfo(ipack_model_type *);
+static void ipack_dumpmodel(void *);*/
+#endif
+
+#endif
+
+//ORIGIN: include/Builders/PredictorGenerator.h
+
+/*******************************************************************************
+* FILE: PredictorGenerator.h
+* AUTHOR: Tam<61>s Gergely
+* MODIFIED: $Id: 301-jffs-compression,v 1.1 2005/03/26 10:33:31 wbx Exp $
+*******************************************************************************/
+
+#ifndef PREDICTORGENERATOR_H
+#define PREDICTORGENERATOR_H
+
+//#include "DataStructures.h"
+
+#ifdef JFFS2_BBC_ARMLIB_MODELGEN
+static PredictorTable *predictorgenerator_generate(void);
+#endif
+
+#endif
+
+//ORIGIN: include/Builders/Coder.h
+
+/*******************************************************************************
+* FILE: Coder.h
+* AUTHOR: Tam<61>s Gergely
+* MODIFIED: $Id: 301-jffs-compression,v 1.1 2005/03/26 10:33:31 wbx Exp $
+*******************************************************************************/
+
+#ifndef CODER_H
+#define CODER_H
+
+#define CODER_VALUEBITS 16
+#define CODER_VALUEMAX 0x00010000l
+#define CODER_VALUE3RD 0x0000c000l
+#define CODER_VALUEHLF 0x00008000l
+#define CODER_VALUE1ST 0x00004000l
+
+#endif
+
+//ORIGIN: DataStructures/src/TypeDefs.c
+
+/*******************************************************************************
+* FILE: TypeDefs.c
+* AUTHOR: Tam<61>s Gergely
+* MODIFIED: $Id: 301-jffs-compression,v 1.1 2005/03/26 10:33:31 wbx Exp $
+*******************************************************************************/
+
+//#include "ipack_common.h"
+//#include "DataStructures/TypeDefs.h"
+#ifndef __KERNEL__
+#include <memory.h>
+#endif
+
+#define VECTOR_ALLOC_SIZE 0x00001000
+
+static void vector_clear(vector * vct)
+{
+ if (vct->ptr)
+ jffs2_bbc_free(vct->ptr);
+ vct->capacity = 0;
+ vct->size = 0;
+ vct->ptr = 0;
+}
+
+#ifdef JFFS2_BBC_ARMLIB_MODELGEN
+static void vector_extend(vector * vct)
+{
+ void *tmp;
+ vct->capacity += vct->alloc_size;
+ tmp = jffs2_bbc_malloc(vct->capacity);
+ if (vct->ptr) {
+ memcpy(tmp, vct->ptr, vct->size);
+ jffs2_bbc_free(vct->ptr);
+ }
+ vct->ptr = tmp;
+}
+
+static void vector_reset(vector * vct)
+{
+ vct->capacity = 0;
+ vct->size = 0;
+ vct->alloc_size = VECTOR_ALLOC_SIZE;
+ vct->ptr = 0;
+}
+
+static void vector_clr_ptr(vector * vct)
+{
+ void **it;
+ void *end_it;
+ for (it = vct->ptr, end_it = (((char *) (vct->ptr)) + vct->size); it != end_it; it++) {
+ vector_clear(*it);
+ jffs2_bbc_free(*it);
+ }
+ if (vct->ptr)
+ jffs2_bbc_free(vct->ptr);
+ vct->capacity = 0;
+ vct->size = 0;
+ vct->ptr = 0;
+}
+
+static void vector_add_u8(vector * vct, u8 val)
+{
+ if ((vct->size) + sizeof(u8) > (vct->capacity)) {
+ vector_extend(vct);
+ }
+ *(u8 *) ((char *) (vct->ptr) + (vct->size)) = val;
+ vct->size += sizeof(u8);
+};
+
+static void vector_add_u16(vector * vct, u16 val)
+{
+ if ((vct->size) + sizeof(u16) > (vct->capacity)) {
+ vector_extend(vct);
+ }
+ *(u16 *) ((char *) (vct->ptr) + (vct->size)) = val;
+ vct->size += sizeof(u16);
+};
+
+static void vector_add_u32(vector * vct, u32 val)
+{
+ if ((vct->size) + sizeof(u32) > (vct->capacity)) {
+ vector_extend(vct);
+ }
+ *(u32 *) ((char *) (vct->ptr) + (vct->size)) = val;
+ vct->size += sizeof(u32);
+};
+
+static void vector_add_s8(vector * vct, s8 val)
+{
+ if ((vct->size) + sizeof(s8) > (vct->capacity)) {
+ vector_extend(vct);
+ }
+ *(s8 *) ((char *) (vct->ptr) + (vct->size)) = val;
+ vct->size += sizeof(s8);
+};
+
+static void vector_add_s16(vector * vct, s16 val)
+{
+ if ((vct->size) + sizeof(s16) > (vct->capacity)) {
+ vector_extend(vct);
+ }
+ *(s16 *) ((char *) (vct->ptr) + (vct->size)) = val;
+ vct->size += sizeof(s16);
+};
+
+static void vector_add_s32(vector * vct, s32 val)
+{
+ if ((vct->size) + sizeof(s32) > (vct->capacity)) {
+ vector_extend(vct);
+ }
+ *(s32 *) ((char *) (vct->ptr) + (vct->size)) = val;
+ vct->size += sizeof(s32);
+};
+
+static void vector_add_ptr(vector * vct, void *ptr)
+{
+ if ((vct->size) + sizeof(void *) > (vct->capacity)) {
+ vector_extend(vct);
+ }
+ *(void **) ((char *) (vct->ptr) + (vct->size)) = ptr;
+ vct->size += sizeof(void *);
+}
+
+static void vector_concat(vector * lhs, vector * rhs)
+{
+ void *tmp;
+ if (!(rhs->size)) {
+ return;
+ }
+ tmp = lhs->ptr;
+ lhs->capacity = (lhs->size) + (rhs->size);
+ lhs->ptr = jffs2_bbc_malloc(lhs->capacity);
+ if (tmp) {
+ memcpy(lhs->ptr, tmp, lhs->size);
+ jffs2_bbc_free(tmp);
+ }
+ memcpy((((u8 *) lhs->ptr) + lhs->size), rhs->ptr, rhs->size);
+ lhs->size += rhs->size;
+}
+
+#endif
+
+//ORIGIN: DataStructures/src/BitVector.c
+
+/*******************************************************************************
+* FILE: BitVector.c
+* AUTHOR: Tam<61>s Gergely
+* MODIFIED: $Id: 301-jffs-compression,v 1.1 2005/03/26 10:33:31 wbx Exp $
+*******************************************************************************/
+
+//#include "ipack_common.h"
+//#include "DataStructures/BitVector.h"
+#ifndef __KERNEL__
+#include <memory.h>
+#endif
+
+#define VECTOR_ALLOC_SIZE 0x00001000
+
+#ifdef JFFS2_BBC_ARMLIB_MODELGEN
+
+static void bitblocks_clear(BitBlocks * this)
+{
+ BitVector **it;
+ void *end_it;
+ for (it = this->ptr, end_it = VECTOR_P_END(this); it != end_it; it++) {
+ bitvector_clear(*it);
+ jffs2_bbc_free(*it);
+ }
+ jffs2_bbc_free(this->ptr);
+ this->ptr = 0;
+}
+
+static void bitvector_clear(BitVector * this)
+{
+ if (this->base) {
+ jffs2_bbc_free(this->base);
+ }
+ this->freebits = 0;
+ this->capacity = 0;
+ this->size = 0;
+ this->base = 0;
+ this->ptr = 0;
+}
+
+static void bitvector_W_reset(BitVector * this)
+{
+ this->freebits = 0;
+ this->capacity = 0;
+ this->size = 0;
+ this->base = 0;
+ this->ptr = 0;
+}
+
+static void bitvector_W_add0(BitVector * this)
+{
+ if (!(this->freebits)) {
+ if (this->size == this->capacity) {
+ void *tmp = this->base;
+ this->capacity += VECTOR_ALLOC_SIZE;
+ this->base = jffs2_bbc_malloc(this->capacity);
+ this->ptr = ((u8 *) (this->base)) + this->size;
+ memcpy(this->base, tmp, this->size);
+ jffs2_bbc_free(tmp);
+ }
+ else {
+ this->ptr++;
+ }
+ this->size++;
+ this->freebits = 7;
+ *(this->ptr) = 0x00;
+ }
+ else {
+ this->freebits--;
+ (*(this->ptr)) <<= 1;
+ }
+}
+
+static void bitvector_W_add1(BitVector * this)
+{
+ if (!(this->freebits)) {
+ if (this->size == this->capacity) {
+ void *tmp = this->base;
+ this->capacity += VECTOR_ALLOC_SIZE;
+ this->base = jffs2_bbc_malloc(this->capacity);
+ this->ptr = ((u8 *) (this->base)) + this->size;
+ memcpy(this->base, tmp, this->size);
+ jffs2_bbc_free(tmp);
+ }
+ else {
+ this->ptr++;
+ }
+ this->size++;
+ this->freebits = 7;
+ *(this->ptr) = 0x01;
+ }
+ else {
+ this->freebits--;
+ (*(this->ptr)) <<= 1;
+ (*(this->ptr)) |= 0x01;
+ }
+}
+
+static void bitvector_W_concat_b(BitVector * lhs, BitVector * rhs)
+{
+ void *tmp;
+ if (!(rhs->size)) {
+ return;
+ }
+ tmp = lhs->base;
+ lhs->capacity = ((((lhs->size) + (rhs->size) - 1) / VECTOR_ALLOC_SIZE) + 1) * VECTOR_ALLOC_SIZE;
+ lhs->base = jffs2_bbc_malloc(lhs->capacity);
+ if (tmp) {
+ memcpy(lhs->base, tmp, lhs->size);
+ jffs2_bbc_free(tmp);
+ }
+ memcpy((((u8 *) (lhs->base)) + lhs->size), rhs->base, rhs->size);
+ lhs->freebits = 0;
+ lhs->size += rhs->size;
+ lhs->ptr = ((u8 *) (lhs->base)) + lhs->size;
+}
+
+static void bitvector_W_concat_v(BitVector * lhs, vector * rhs)
+{
+ void *tmp;
+ if (!(rhs->size)) {
+ return;
+ }
+ tmp = lhs->base;
+ lhs->capacity = ((((lhs->size) + (rhs->size) - 1) / VECTOR_ALLOC_SIZE) + 1) * VECTOR_ALLOC_SIZE;
+ lhs->base = jffs2_bbc_malloc(lhs->capacity);
+ if (tmp) {
+ memcpy(lhs->base, tmp, lhs->size);
+ jffs2_bbc_free(tmp);
+ }
+ memcpy((((u8 *) (lhs->base)) + lhs->size), rhs->ptr, rhs->size);
+ lhs->freebits = 0;
+ lhs->size += rhs->size;
+ lhs->ptr = ((u8 *) (lhs->base)) + lhs->size;
+}
+
+static void bitvector_W_flush(BitVector * this)
+{
+ (*(this->ptr)) <<= this->freebits;
+ this->freebits = 0;
+}
+
+static void bitvector_R_reset(BitVector * this)
+{
+ this->freebits = 7;
+ this->ptr = this->base;
+}
+
+static u8 bitvector_R_get1(BitVector * this)
+{
+ u8 tmp = ((*(this->ptr)) >> this->freebits) & 0x01;
+ if (!(this->freebits)) {
+ this->freebits = 7;
+ this->ptr++;
+ }
+ else {
+ this->freebits--;
+ }
+ return tmp;
+}
+
+static u8 bitvector_R_get8(BitVector * this)
+{
+ u8 tmp = (*(this->ptr));
+ this->ptr++;
+ return tmp;
+}
+
+#endif
+
+//ORIGIN: DataStructures/src/DecisionTree.c
+
+/*******************************************************************************
+* FILE: DecisionTree.c
+* AUTHOR: Tam<61>s Gergely
+* MODIFIED: $Id: 301-jffs-compression,v 1.1 2005/03/26 10:33:31 wbx Exp $
+*******************************************************************************/
+
+//#include "ipack_common.h"
+//#include "DataStructures/DecisionTree.h"
+
+static void decisiontree_delete_node(void *root)
+{
+ u8 tmp = GET_NODE_PTR_TYPE(root);
+ if (TREENODETYPE_IS_NODE_BINARY(tmp)) {
+ decisiontree_delete_node(((TreeNodeBinary *) root)->left);
+ decisiontree_delete_node(((TreeNodeBinary *) root)->right);
+ }
+ else if ((tmp) == TREENODETYPE_LEAF_P) {
+ if (((TreeLeafP *) root)->probabilities) {
+ jffs2_bbc_free(((TreeLeafP *) root)->probabilities);
+ }
+ }
+ else if ((tmp) == TREENODETYPE_LEAF_C) {
+ }
+ jffs2_bbc_free(root);
+}
+
+#ifdef JFFS2_BBC_ARMLIB_MODELGEN
+
+static void decisiontree_delete(DecisionTree * dt)
+{
+ decisiontree_delete_node(dt->root);
+ jffs2_bbc_free(dt->predictor_max_values);
+}
+
+static void decisiontree_get_probability_for_token(void *root, PredictorType * preds, TokenType token, ProbabilityType * prob)
+{
+ void *tmp = root;
+ while (TREENODETYPE_IS_NODE(((TreeNodeBinary *) tmp)->type)) {
+ if (((TreeNodeBinary *) tmp)->type == TREENODETYPE_NODE_BINARY_EQ) {
+ if (preds[((TreeNodeBinary *) tmp)->attribute] TREE_SUBTREE_RELATION_LEFT_EQ((TreeNodeBinary *) tmp)->value) {
+ tmp = ((TreeNodeBinary *) tmp)->left;
+ }
+ else {
+ tmp = ((TreeNodeBinary *) tmp)->right;
+ }
+ }
+ else if (((TreeNodeBinary *) tmp)->type == TREENODETYPE_NODE_BINARY_LT) {
+ if (preds[((TreeNodeBinary *) tmp)->attribute] TREE_SUBTREE_RELATION_LEFT_LT((TreeNodeBinary *) tmp)->value) {
+ tmp = ((TreeNodeBinary *) tmp)->left;
+ }
+ else {
+ tmp = ((TreeNodeBinary *) tmp)->right;
+ }
+ }
+ }
+ prob->high = 0;
+ prob->low = 0;
+ prob->max = 0;
+ if (((TreeNodeBinary *) tmp)->type == TREENODETYPE_LEAF_P) {
+ u32 i;
+ u32 lngth = ((TreeLeafP *) tmp)->pairs << 1;
+ for (i = 0; i < lngth;) {
+ TokenType at = ((TreeLeafP *) tmp)->probabilities[i++];
+ TokenType av = ((TreeLeafP *) tmp)->probabilities[i++];
+ if (token > at)
+ prob->low += av;
+ if (token >= at)
+ prob->high += av;
+ prob->max += av;
+ }
+ }
+ else if (((TreeNodeBinary *) tmp)->type == TREENODETYPE_LEAF_C) {
+ if (((TreeLeafC *) tmp)->predicted_class == token) {
+ prob->high = TOKEN_MAXVALUE;
+ prob->max = TOKEN_MAXVALUE;
+ }
+ }
+}
+
+static TokenType decisiontree_get_token_for_range(void *root, PredictorType * preds, u32 value, u32 range, ProbabilityType * prob)
+{
+ void *tmp = root;
+ TokenType token = 0;
+ while (TREENODETYPE_IS_NODE(((TreeNodeBinary *) tmp)->type)) {
+ if (((TreeNodeBinary *) tmp)->type == TREENODETYPE_NODE_BINARY_EQ) {
+ if (preds[((TreeNodeBinary *) tmp)->attribute] TREE_SUBTREE_RELATION_LEFT_EQ((TreeNodeBinary *) tmp)->value) {
+ tmp = ((TreeNodeBinary *) tmp)->left;
+ }
+ else {
+ tmp = ((TreeNodeBinary *) tmp)->right;
+ }
+ }
+ else if (((TreeNodeBinary *) tmp)->type == TREENODETYPE_NODE_BINARY_LT) {
+ if (preds[((TreeNodeBinary *) tmp)->attribute] TREE_SUBTREE_RELATION_LEFT_LT((TreeNodeBinary *) tmp)->value) {
+ tmp = ((TreeNodeBinary *) tmp)->left;
+ }
+ else {
+ tmp = ((TreeNodeBinary *) tmp)->right;
+ }
+ }
+ }
+ prob->high = 0;
+ prob->low = 0;
+ prob->max = 0;
+ if (((TreeNodeBinary *) tmp)->type == TREENODETYPE_LEAF_P) {
+ u32 i;
+ u32 norm;
+ TokenType at = 0;
+ TokenType av;
+ u32 lngth = ((TreeLeafP *) tmp)->pairs << 1;
+ for (i = 0; i < lngth;) {
+ i++;
+ prob->max += ((TreeLeafP *) tmp)->probabilities[i++];
+ }
+ norm = (value * prob->max - 1) / range;
+ for (i = 0; prob->high <= norm;) {
+ at = ((TreeLeafP *) tmp)->probabilities[i++];
+ av = ((TreeLeafP *) tmp)->probabilities[i++];
+ prob->high += av;
+ if (prob->high <= norm)
+ prob->low += av;
+ }
+ token = at;
+ }
+ else if (((TreeNodeBinary *) tmp)->type == TREENODETYPE_LEAF_C) {
+ token = ((TreeLeafC *) tmp)->predicted_class;
+ prob->high = TOKEN_MAXVALUE;
+ prob->max = TOKEN_MAXVALUE;
+ }
+ return token;
+}
+#endif
+
+//ORIGIN: DataStructures/src/PredictorTable.c
+
+/*******************************************************************************
+* FILE: PredictorTable.c
+* AUTHOR: Tam<61>s Gergely
+* MODIFIED: $Id: 301-jffs-compression,v 1.1 2005/03/26 10:33:31 wbx Exp $
+*******************************************************************************/
+
+//#include "ipack_common.h"
+//#include "DataStructures/PredictorTable.h"
+
+#ifdef JFFS2_BBC_ARMLIB_MODELGEN
+
+static void predictortable_clear(PredictorTable * table)
+{
+ table->predictors = 0;
+}
+
+static void predictortable_free(PredictorTable * table)
+{
+ if (table->predictors) {
+ jffs2_bbc_free(table->predictors);
+ table->predictors = 0;
+ }
+}
+
+static void predictortable_resetARM(PredictorTable * table)
+{
+ register PredictorType *ptr = table->predictors;
+ register PredictorType *end = ptr + NUMBER_OF_PREDICTORS_ARM;
+ while (ptr < end) {
+ *(ptr++) = 0;
+ }
+}
+
+static void predictortable_updateARM(PredictorTable * table, TokenType token)
+{
+ register PredictorType *ptr = table->predictors;
+ register u32 ndx = ptr[0] + 1;
+ ptr[ndx + 8] = ptr[ndx];
+ ptr[ndx] = token;
+ if (ndx == 8) {
+ ptr[0] = 0;
+ }
+ else {
+ ++ptr[0];
+ }
+}
+
+static PredictorType predictortable_minvalueARM(PredictorTable * table, u32 index)
+{
+ return 0;
+}
+
+static PredictorType predictortable_maxvalueARM(PredictorTable * table, u32 index)
+{
+ if (index == 0) {
+ return 7;
+ }
+ else {
+ return 15;
+ }
+}
+
+#endif
+
+#ifndef __KERNEL__
+
+/*static void predictortable_resetTXT(PredictorTable * table)
+{
+ register PredictorType *ptr = table->predictors;
+ register PredictorType *end = ptr + NUMBER_OF_PREDICTORS_TXT;
+ while (ptr < end) {
+ *(ptr++) = 0;
+ }
+}
+
+static void predictortable_updateTXT(PredictorTable * table, TokenType token)
+{ //TODO: modify
+ register PredictorType *ptr = table->predictors;
+// register u32 ndx;
+ ptr[0] = token;
+ if ((('a' <= token) && (token <= 'z')) || (('A' <= token) && (token <= 'Z'))) {
+ ++(ptr[1]);
+ }
+ else {
+ ptr[1] = 0;
+ }
+}
+
+static PredictorType predictortable_minvalueTXT(PredictorTable * table, u32 index)
+{
+ return 0;
+}
+
+static PredictorType predictortable_maxvalueTXT(PredictorTable * table, u32 index)
+{ //TODO: modify
+ return 254;
+}*/
+
+#endif // __KERNEL__
+
+//ORIGIN: DataStructures/src/ipack_model.c
+
+/*******************************************************************************
+* FILE: ipack_model.c
+* AUTHOR: Tam<61>s Gergely
+* MODIFIED: $Id: 301-jffs-compression,v 1.1 2005/03/26 10:33:31 wbx Exp $
+*******************************************************************************/
+
+//#include "DataStructures/ipack_model.h"
+//#include "measuredef.h"
+//#include "ipack_common.h"
+
+#ifdef __MEASURE_TIME_MODEL_GETPROB
+#define __MT_P_MAX 256
+#define __MT_P_DIV 128
+#define __MT_P_MIN 0
+#endif
+
+static void ipack_model_get_probability_for_token(ipack_nodetype * tmp, TokenType token, ipack_probability_type * prob)
+{
+// register ipack_nodetype* tmp = model->tree_root_ptr;
+// register ipack_nodetype* tmp = root;
+ while (TREENODETYPE_IS_NODE(tmp->type)) {
+ if (tmp->type == TREENODETYPE_NODE_BINARY_EQ) {
+ if (*(tmp->data.nodeBin.attribute_ptr) TREE_SUBTREE_RELATION_LEFT_EQ tmp->data.nodeBin.value) {
+ ((char *) tmp) += sizeof(tmp->type) + sizeof(ipack_treenodeBin);
+ }
+ else {
+ tmp = tmp->data.nodeBin.right_child_ptr;
+ }
+ }
+ else if (tmp->type == TREENODETYPE_NODE_BINARY_LT) {
+ if (*(tmp->data.nodeBin.attribute_ptr) TREE_SUBTREE_RELATION_LEFT_LT tmp->data.nodeBin.value) {
+ ((char *) tmp) += sizeof(tmp->type) + sizeof(ipack_treenodeBin);
+ }
+ else {
+ tmp = tmp->data.nodeBin.right_child_ptr;
+ }
+ }
+ }
+ prob->high = 0;
+ prob->low = 0;
+// prob->max = 0;
+ if (tmp->type == TREENODETYPE_LEAF_P) {
+ if (token) {
+ prob->low = tmp->data.leafP.probabilities[token - 1];
+ }
+ prob->high = tmp->data.leafP.probabilities[token];
+// prob->max = tmp->data.leafP.probabilities[15];
+ }
+ else if (tmp->type == TREENODETYPE_LEAF_C) {
+ if (tmp->data.leafC.predicted_class == token) {
+ prob->high = TOKEN_MAXVALUE;
+// prob->max = TOKEN_MAXVALUE;
+ }
+ }
+}
+
+#ifndef IPACK_ARM_ASM
+
+//return ipack_model_get_token_for_range2(tmp,value,range,prob);
+
+static TokenType ipack_model_get_token_for_range(ipack_nodetype * tmp, u32 value, u32 range, ipack_probability_type * prob)
+{
+// register ipack_nodetype* tmp = model->tree_root_ptr;
+// register ipack_nodetype* tmp = root;
+ register TokenType token = 0;
+ while (TREENODETYPE_IS_NODE(tmp->type)) {
+ if (tmp->type == TREENODETYPE_NODE_BINARY_EQ) {
+ if (*(tmp->data.nodeBin.attribute_ptr) TREE_SUBTREE_RELATION_LEFT_EQ tmp->data.nodeBin.value) {
+ ((char *) tmp) += sizeof(tmp->type) + sizeof(ipack_treenodeBin);
+ }
+ else {
+ tmp = tmp->data.nodeBin.right_child_ptr;
+ }
+ }
+ else if (tmp->type == TREENODETYPE_NODE_BINARY_LT) {
+ if (*(tmp->data.nodeBin.attribute_ptr) TREE_SUBTREE_RELATION_LEFT_LT tmp->data.nodeBin.value) {
+ ((char *) tmp) += sizeof(tmp->type) + sizeof(ipack_treenodeBin);
+ }
+ else {
+ tmp = tmp->data.nodeBin.right_child_ptr;
+ }
+ }
+ }
+ prob->high = 0;
+ prob->low = 0;
+// prob->max = 0;
+ if (tmp->type == TREENODETYPE_LEAF_P) {
+ u32 i;
+ u32 norm;
+// prob->max = tmp->data.leafP.probabilities[15];
+/* norm = (value * prob->max -1)/range;
+ for(i = 0; i < 15; ++i) {
+ if(tmp->data.leafP.probabilities[i] > norm) {
+ break;
+ }
+ }*/
+ norm = ((value << PROBABILITY_SHIFT) - 1);
+ for (i = 0; i < NUMBER_OF_TOKENS; ++i) {
+ if (range * tmp->data.leafP.probabilities[i] > norm) {
+ break;
+ }
+ }
+ token = (TokenType) i;
+ prob->high = tmp->data.leafP.probabilities[i];
+ if (token) {
+ prob->low = tmp->data.leafP.probabilities[token - 1];
+ }
+ }
+ else if (tmp->type == TREENODETYPE_LEAF_C) {
+ token = tmp->data.leafC.predicted_class;
+ prob->high = PROBABILITY_MAX;
+// prob->max = PROBABILITY_MAX;
+ }
+ return token;
+}
+#endif
+/*
+void ipack_model_predictortable_reset(PredictorType* ptr)
+{
+// register PredictorType* ptr = model->predictors_ptr;
+// register PredictorType* ptr = preds;
+ register PredictorType* end = ptr + NUMBER_OF_PREDICTORS;
+ while(ptr < end) {
+ *(ptr++) = 0;
+ }
+}
+
+void ipack_model_predictortable_update(PredictorType* ptr, TokenType token)
+{
+// register PredictorType* ptr = model->predictors_ptr;
+// register PredictorType* ptr = preds;
+ register u32 ndx = ptr[0] + 1;
+ ptr[ndx + 8] = ptr[ndx];
+ ptr[ndx] = token;
+ if(ndx == 8) {
+ ptr[0] = 0;
+ } else {
+ ++ ptr[0];
+ }
+}*/
+/****************************************************************************/
+
+#ifndef __KERNEL__
+static void ipack_model_countpreds(void *ptr, ipack_nodetype * node, double *table, double val)
+{
+ if ((node->type == TREENODETYPE_NODE_BINARY_EQ) || (node->type == TREENODETYPE_NODE_BINARY_LT)) {
+ table[(u32) (node->data.nodeBin.attribute_ptr) - (u32) (ptr)] += val;
+ ipack_model_countpreds(ptr, (void *) (((u8 *) (node)) + sizeof(node->type) + sizeof(ipack_treenodeBin)), table, val / 2);
+ ipack_model_countpreds(ptr, node->data.nodeBin.right_child_ptr, table, val / 2);
+ }
+ else {
+ }
+}
+
+/*static void ipack_model_printinfo(ipack_model_type * model)
+{
+ double *prcnt = jffs2_bbc_malloc(sizeof(double) * NUMBER_OF_PREDICTORS);
+ u32 i;
+ for (i = 0; i < NUMBER_OF_PREDICTORS; i++) {
+ prcnt[i] = 0.0;
+ }
+ ipack_model_countpreds(model->predictors_ptr, model->tree_root_ptr, prcnt, 100);
+ for (i = 0; i < NUMBER_OF_PREDICTORS; i++) {
+ jffs2_bbc_print3(" p[%3d] = %10.6lf\n", (int) i, prcnt[i]);
+ }
+ jffs2_bbc_free(prcnt);
+}*/
+
+static void ipack_dumpnode(unsigned char **ptr, FILE * file, char *prefs)
+{
+ switch (*((*ptr)++)) {
+ u32 i;
+ u32 j;
+ u32 x;
+ u32 y;
+ case TREENODETYPE_NODE_BINARY_EQ:
+ x = *((*ptr)++);
+ y = *((*ptr)++);
+ fprintf(file, "%s+->\tBinary node: P[%u] equals %u\n", prefs, (unsigned int)x, (unsigned int)y);
+ for (j = 0; j < 4096 && prefs[j]; ++j);
+ prefs[j] = '\t';
+ prefs[++j] = '|';
+ ipack_dumpnode(ptr, file, prefs);
+ prefs[j--] = 0;
+ ipack_dumpnode(ptr, file, prefs);
+ prefs[j] = 0;
+ break;
+ case TREENODETYPE_NODE_BINARY_LT:
+ x = *((*ptr)++);
+ y = *((*ptr)++);
+ fprintf(file, "%s+->\tBinary node: P[%u] greater than %u\n", prefs, (unsigned int)x, (unsigned int)y);
+ for (j = 0; j < 4096 && prefs[j]; ++j);
+ prefs[j] = '\t';
+ prefs[++j] = '|';
+ ipack_dumpnode(ptr, file, prefs);
+ prefs[j--] = 0;
+ ipack_dumpnode(ptr, file, prefs);
+ prefs[j] = 0;
+ break;
+ case TREENODETYPE_LEAF_P:
+ x = *((*ptr)++);
+ fprintf(file, "%s+->\tLeaf: %u pairs\n", prefs, (unsigned int)x);
+ (*ptr) += (x << 1);
+ break;
+ case TREENODETYPE_LEAF_C:
+ x = *((*ptr)++);
+ fprintf(file, "%s+->\tLeaf: class %u\n", prefs, (unsigned int)x);
+ break;
+ default:
+ fprintf(file, "%s+->\tLeaf: nullnode\n", prefs);
+ }
+}
+
+/*static void ipack_dumpmodel(void *model)
+{
+ unsigned char *tmp_ptr = model;
+ FILE *file;
+ char C[4096];
+ if ((file = fopen("DUMPED_MODEL", "wa"))) {
+ int i;
+ for (i = 0; i < 4096; C[i++] = 0);
+ tmp_ptr += 8;
+ tmp_ptr += sizeof(u32);
+ ipack_dumpnode(&tmp_ptr, file, C);
+ fclose(file);
+ }
+}*/
+
+#endif
+
+//ORIGIN: Builders/src/PredictorGenerator.c
+
+/*******************************************************************************
+* FILE: PredictorGenerator.c
+* AUTHOR: Tam<61>s Gergely
+* MODIFIED: $Id: 301-jffs-compression,v 1.1 2005/03/26 10:33:31 wbx Exp $
+*******************************************************************************/
+
+//#include "ipack_common.h"
+//#include "Builders/PredictorGenerator.h"
+
+#ifdef JFFS2_BBC_ARMLIB_MODELGEN
+static PredictorTable *predictorgenerator_generate( /*PredictorGeneratorSettings* settings */ )
+{
+ PredictorTable *ptr = jffs2_bbc_malloc(sizeof(PredictorTable));
+ predictortable_clear(ptr);
+ ptr->predictors = jffs2_bbc_malloc(NUMBER_OF_PREDICTORS * sizeof(PredictorType));
+ return ptr;
+}
+#endif
+
+//ORIGIN: Builders/src/ipack_armlib_compressor.c
+
+/*******************************************************************************
+* FILE: ipack_armlim_compressor.c
+* AUTHOR: Tam<61>s Gergely
+* MODIFIED: $Id: 301-jffs-compression,v 1.1 2005/03/26 10:33:31 wbx Exp $
+*******************************************************************************/
+
+//#include "ipack_common.h"
+//#include "DataStructures.h"
+//#include "Builders/PredictorGenerator.h"
+//#include "Builders/Tokenizer.h"
+//#include "Builders/Coder.h"
+
+#define EC_NO_ERROR 0
+#define EC_NOT_IPMF_FILE -1
+#define EC_NOT_IPMF_MODEL -2
+#define EC_NOT_HG_BLOCK -3
+#define EC_WRONG_INPUT_LENGTH -501
+#define EC_CODER_WRONG_PROBABILITY 1
+#define EC_CODER_WRONG_RANGE 2
+#define EC_BUFFER_OVERFLOW 501
+#define EC_BUFFER_UNDERFLOW 502
+#define EC_UNKNOWN_TOKEN_TYPE 1001
+#define EC_UNKNOWN_FILTER 1002
+#define EC_UNKNOWN_CONVERTER 1003
+#define EC_UNKNOWN_MANIPULATOR 1004
+
+/*******************************************************************************
+
+ COMPRESSOR INIT FUNCTIONS
+
+*******************************************************************************/
+
+#define ROUND_UP_TO_DWORD(val) ( ( (val) + 3 ) & 0xfffffffc )
+
+#ifndef __KERNEL__
+int ipack_glb_endian_X;
+#endif
+
+static int ipack_compressor_init_tree(unsigned char **ptr, ipack_model_type * model, ipack_nodetype * node, void *nullnode)
+{
+ int retval = 0;
+ node->type = *((*ptr)++);
+ switch (node->type) {
+ u32 i;
+ u32 j;
+ u32 lngth;
+ u32 tmpret;
+ TokenType at;
+ u16 av;
+ case TREENODETYPE_NODE_BINARY_EQ:
+ case TREENODETYPE_NODE_BINARY_LT:
+ node->data.nodeBin.attribute_ptr = (model->predictors_ptr) + (*((*ptr)++));
+ node->data.nodeBin.value = *((*ptr)++);
+ retval = sizeof(node->data.nodeBin);
+ retval += ipack_compressor_init_tree(ptr, model, (void *) ROUND_UP_TO_DWORD(((u32) node) + sizeof(node->type) + sizeof(node->data.nodeBin)), nullnode);
+ node->data.nodeBin.right_child_ptr = (void *) ROUND_UP_TO_DWORD(((u32) node) + retval + sizeof(node->type));
+ retval += ipack_compressor_init_tree(ptr, model, node->data.nodeBin.right_child_ptr, nullnode);
+ break;
+ case TREENODETYPE_LEAF_P:
+ lngth = *((*ptr)++);
+ av = 0;
+ for (i = 0, j = 0; i < lngth; ++i) {
+ at = *((*ptr)++);
+ while (j < at) {
+ node->data.leafP.probabilities[j++] = av;
+ }
+ av += *((*ptr)++);
+ }
+ while (j < NUMBER_OF_TOKENS) {
+ node->data.leafP.probabilities[j++] = av;
+ }
+ for (i = 0; i < NUMBER_OF_TOKENS; ++i) {
+ node->data.leafP.probabilities[i] = ((node->data.leafP.probabilities[i] << PROBABILITY_SHIFT) / node->data.leafP.probabilities[NUMBER_OF_TOKENS - 1]);
+ }
+ retval = ROUND_UP_TO_DWORD(NUMBER_OF_TOKENS * sizeof(u16));
+ break;
+ case TREENODETYPE_LEAF_C:
+ node->data.leafC.predicted_class = *((*ptr)++);
+ retval = sizeof(node->data.leafC);
+ retval = ROUND_UP_TO_DWORD(retval);
+ break;
+ default:
+ return 0;
+ }
+ return retval + sizeof(node->type);
+}
+
+#define IPACK_TREE_CONVERT_REPLACE 0
+#define IPACK_TREE_CONVERT_KEEP 1
+
+static void *ipack_tree_to_code(ipack_model_type * model, int *code_size);
+
+static int ipack_armlib_convert_tree_to_code(ipack_model_type * model_img, int mode)
+{
+#ifdef IPACK_TREE_TO_CODE
+ int tree_size;
+
+ model_img->tree_code = ipack_tree_to_code(model_img, &tree_size);
+ jffs2_bbc_print2("Convertation done. Code size=%d\n", tree_size);
+ if (mode == IPACK_TREE_CONVERT_REPLACE) {
+ jffs2_bbc_print1("Freeing original tree.\n");
+ jffs2_bbc_free(model_img->tree_root_ptr);
+ model_img->tree_root_ptr = NULL;
+ }
+#endif
+ return 0;
+}
+
+
+static int ipack_armlib_compressor_init(void **model)
+{
+ int retval = EC_NO_ERROR;
+ unsigned char *tmp_ptr = *model;
+ u32 i;
+ ipack_model_type *model_img;
+ char tmp_c[2];
+
+ if (*(tmp_ptr++) != 'i') {
+ return EC_NOT_IPMF_FILE;
+ }
+ else if (*(tmp_ptr++) != 'P') {
+ return EC_NOT_IPMF_FILE;
+ }
+ else if (*(tmp_ptr++) != 'M') {
+ return EC_NOT_IPMF_FILE;
+ }
+ else if (*(tmp_ptr++) != 'F') {
+ return EC_NOT_IPMF_FILE;
+ }
+ tmp_c[0] = *(tmp_ptr++);
+ tmp_c[1] = *(tmp_ptr++);
+ tmp_ptr += 2;
+
+ //model_img = jffs2_bbc_malloc(*((u32*)tmp_ptr));
+ model_img = jffs2_bbc_malloc(sizeof(ipack_model_type) + ROUND_UP_TO_DWORD(NUMBER_OF_PREDICTORS));
+ model_img->tree_root_ptr = jffs2_bbc_malloc(*((u32 *) tmp_ptr)); //it is smaller a little but, but...
+
+ tmp_ptr += sizeof(u32);
+
+ model_img->ID[0] = 'i';
+ model_img->ID[1] = 'P';
+ model_img->ID[2] = 'M';
+ model_img->ID[3] = 'F';
+
+ model_img->block_sign[0] = tmp_c[0];
+ model_img->block_sign[1] = tmp_c[1];
+
+ model_img->nullnode.type = TREENODETYPE_LEAF_P;
+ for (i = 0; i < NUMBER_OF_TOKENS; ++i) {
+ model_img->nullnode.probabilities[i] = 0;
+ }
+ model_img->predictors_ptr = (void *) (((u32) model_img) + sizeof(ipack_model_type));
+ //model_img->tree_root_ptr = (void*)ROUND_UP_TO_DWORD(((u32)(model_img->predictors_ptr)) + NUMBER_OF_PREDICTORS);//ALIGN
+
+ ipack_compressor_init_tree(&tmp_ptr, model_img, model_img->tree_root_ptr, &(model_img->nullnode));
+
+#ifdef IPACK_TREE_TO_CODE
+#ifdef IPACK_AUTO_TREE_TO_CODE
+ jffs2_bbc_print1("Automatically converting tree to ARM code...\n");
+ ipack_armlib_convert_tree_to_code(model_img, IPACK_TREE_CONVERT_REPLACE);
+#else
+ model_img->tree_code = NULL;
+#endif
+#else
+ model_img->tree_code = NULL;
+#endif
+
+ jffs2_bbc_free(*model);
+ *model = model_img;
+ return retval;
+}
+
+/*******************************************************************************
+
+ COMPRESSOR DEINIT FUNCTIONS
+
+*******************************************************************************/
+
+
+/* Descructor of compressor (model will be freed with jffs2_bbc_free() after it)*/
+static void ipack_armlib_compressor_deinit(void)
+{
+}
+
+/*******************************************************************************
+
+ COMPRESS FUNCTIONS
+
+*******************************************************************************/
+
+static int writebits0(unsigned char **dest, u8 * freebits, u32 * opposite, unsigned char *end)
+{
+ if (!(*freebits)) {
+ ++(*dest);
+ *freebits = 7;
+ **dest = 0x00;
+ }
+ else {
+ --(*freebits);
+ (**dest) <<= 1;
+ }
+ if ((*dest == end) && !(*freebits)) {
+ return EC_BUFFER_OVERFLOW;
+ }
+ while (*opposite) {
+ --(*opposite);
+ if (!(*freebits)) {
+ ++(*dest);
+ *freebits = 7;
+ **dest = 0x01;
+ }
+ else {
+ --(*freebits);
+ (**dest) <<= 1;
+ (**dest) |= 0x01;
+ }
+ if ((*dest == end) && !(*freebits)) {
+ return EC_BUFFER_OVERFLOW;
+ }
+ }
+ return 0;
+}
+
+static int writebits1(unsigned char **dest, u8 * freebits, u32 * opposite, unsigned char *end)
+{
+ if (!(*freebits)) {
+ ++(*dest);
+ *freebits = 7;
+ **dest = 0x01;
+ }
+ else {
+ --(*freebits);
+ (**dest) <<= 1;
+ (**dest) |= 0x01;
+ }
+ if ((*dest == end) && !(*freebits)) {
+ return EC_BUFFER_OVERFLOW;
+ }
+ while (*opposite) {
+ --(*opposite);
+ if (!(*freebits)) {
+ ++(*dest);
+ *freebits = 7;
+ **dest = 0x00;
+ }
+ else {
+ --(*freebits);
+ (**dest) <<= 1;
+ }
+ if ((*dest == end) && !(*freebits)) {
+ return EC_BUFFER_OVERFLOW;
+ }
+ }
+ return 0;
+}
+
+
+
+
+/* Compress block
+ * *dstlen bytes are allocated.
+ * if it is not enough write *sourcelen over to the processed amount of data
+ * returns non zero if fails
+ */
+static int ipack_armlib_compress(void *model, unsigned char *input, unsigned char *output, unsigned long *sourcelen, unsigned long *dstlen)
+{
+ register u32 coder_high = CODER_VALUEMAX - 1;
+ register u32 coder_low = 0;
+ u32 coder_opbits = 0;
+ u8 bitvector_freebits = 8;
+ unsigned char *bitvector_ptr = output;
+ unsigned char *bitvector_end = output + (*dstlen - 1);
+ ARM_DataType *tmpp;
+ TokenStream tmpv;
+ TokenType *it;
+ void *end_it;
+
+ ipack_nodetype *treeroot = ((ipack_model_type *) model)->tree_root_ptr;
+ PredictorType *predctrs = ((ipack_model_type *) model)->predictors_ptr;
+
+#ifdef IPACK_TREE_TO_CODE
+ void (*treefunc) (ipack_nodetype *, TokenType, ipack_probability_type *);
+
+ treefunc = ((ipack_model_type *) model)->tree_code;
+ if (treefunc != NULL)
+ treefunc += 4;
+#endif
+
+ if ((*sourcelen % 4) != 0) {
+ return EC_WRONG_INPUT_LENGTH;
+ }
+ if (*dstlen <= 4) {
+ return EC_BUFFER_OVERFLOW;
+ }
+
+ if (((ipack_model_type *) model)->ID[0] != 'i') {
+ return EC_NOT_IPMF_MODEL;
+ }
+ else if (((ipack_model_type *) model)->ID[1] != 'P') {
+ return EC_NOT_IPMF_MODEL;
+ }
+ else if (((ipack_model_type *) model)->ID[2] != 'M') {
+ return EC_NOT_IPMF_MODEL;
+ }
+ else if (((ipack_model_type *) model)->ID[3] != 'F') {
+ return EC_NOT_IPMF_MODEL;
+ }
+#ifdef TXT_TOKENS
+ tmpv.capacity = (*sourcelen);
+#else
+ tmpv.capacity = (*sourcelen) << 1;
+#endif
+ tmpv.size = tmpv.capacity;
+ tmpv.ptr = jffs2_bbc_malloc(tmpv.size);
+ it = tmpv.ptr;
+
+#ifndef __KERNEL__
+ if (ipack_glb_endian_X) {
+ for (tmpp = (void *) input; (u32) tmpp < (u32) (input + *sourcelen); ++tmpp) {
+#ifdef TXT_TOKENS
+ *(it++) = (u8) ((*tmpp & 0xff000000) >> 24);
+ *(it++) = (u8) ((*tmpp & 0x00ff0000) >> 16);
+ *(it++) = (u8) ((*tmpp & 0x0000ff00) >> 8);
+ *(it++) = (u8) ((*tmpp & 0x000000ff));
+#else
+ *(it++) = (u8) ((*tmpp & 0x0000f000) >> 12);
+ *(it++) = (u8) ((*tmpp & 0x0000000f));
+ *(it++) = (u8) ((*tmpp & 0xf0000000) >> 28);
+ *(it++) = (u8) ((*tmpp & 0x000f0000) >> 16);
+ *(it++) = (u8) ((*tmpp & 0x00000f00) >> 8);
+ *(it++) = (u8) ((*tmpp & 0x00f00000) >> 20);
+ *(it++) = (u8) ((*tmpp & 0x0f000000) >> 24);
+ *(it++) = (u8) ((*tmpp & 0x000000f0) >> 4);
+#endif //TXT_TOKENS
+ }
+ }
+ else {
+#endif
+ for (tmpp = (void *) input; (u32) tmpp < (u32) (input + *sourcelen); ++tmpp) {
+#ifdef TXT_TOKENS
+ *(it++) = (u8) ((*tmpp & 0x000000ff));
+ *(it++) = (u8) ((*tmpp & 0x0000ff00) >> 8);
+ *(it++) = (u8) ((*tmpp & 0x00ff0000) >> 16);
+ *(it++) = (u8) ((*tmpp & 0xff000000) >> 24);
+#else
+ *(it++) = (u8) ((*tmpp & 0x00f00000) >> 20);
+ *(it++) = (u8) ((*tmpp & 0x0f000000) >> 24);
+ *(it++) = (u8) ((*tmpp & 0x000000f0) >> 4);
+ *(it++) = (u8) ((*tmpp & 0x00000f00) >> 8);
+ *(it++) = (u8) ((*tmpp & 0x000f0000) >> 16);
+ *(it++) = (u8) ((*tmpp & 0x0000f000) >> 12);
+ *(it++) = (u8) ((*tmpp & 0x0000000f));
+ *(it++) = (u8) ((*tmpp & 0xf0000000) >> 28);
+#endif //TXT_TOKENS
+ }
+#ifndef __KERNEL__
+ }
+#endif
+/*
+ ENCODE
+*/
+ { //predictor reset
+ register PredictorType *ptr = predctrs;
+ register PredictorType *end = ptr + NUMBER_OF_PREDICTORS;
+ while (ptr < end) {
+ *(ptr++) = 0;
+ }
+ }
+
+ //*(bitvector_ptr++) = 'H';
+ //*(bitvector_ptr++) = 'G';
+ *(bitvector_ptr++) = ((ipack_model_type *) model)->block_sign[0];
+ *(bitvector_ptr++) = ((ipack_model_type *) model)->block_sign[1];
+
+ *(bitvector_ptr++) = (unsigned char) (((*sourcelen) >> 8) & 0xff);
+ *(bitvector_ptr++) = (unsigned char) ((*sourcelen) & 0xff);
+ for (it = tmpv.ptr, end_it = VECTOR_S_END(tmpv); it != end_it; ++it) {
+ ipack_probability_type prob;
+ u32 range;
+
+#ifdef IPACK_TREE_TO_CODE
+ if (treefunc != NULL)
+ (*treefunc) (treeroot, *it, &prob);
+ else
+ ipack_model_get_probability_for_token(treeroot, *it, &prob);
+#else
+ ipack_model_get_probability_for_token(treeroot, *it, &prob);
+#endif
+
+ if (prob.high == prob.low) {
+ vector_clear(&tmpv);
+ return EC_CODER_WRONG_PROBABILITY;
+ }
+ range = coder_high - coder_low + 1;
+ coder_high = coder_low + ((range * prob.high) >> PROBABILITY_SHIFT) - 1;
+ coder_low += ((range * prob.low) >> PROBABILITY_SHIFT);
+ for (;;) {
+ if (coder_high < CODER_VALUEHLF) {
+ if (writebits0(&bitvector_ptr, &bitvector_freebits, &coder_opbits, bitvector_end)) {
+ vector_clear(&tmpv);
+ return EC_BUFFER_OVERFLOW;
+ }
+ }
+ else if (coder_low >= CODER_VALUEHLF) {
+ if (writebits1(&bitvector_ptr, &bitvector_freebits, &coder_opbits, bitvector_end)) {
+ vector_clear(&tmpv);
+ return EC_BUFFER_OVERFLOW;
+ }
+ coder_high -= CODER_VALUEHLF;
+ coder_low -= CODER_VALUEHLF;
+ }
+ else if ((CODER_VALUE1ST <= coder_low) && (coder_high < CODER_VALUE3RD)) {
+ ++coder_opbits;
+ coder_high -= CODER_VALUE1ST;
+ coder_low -= CODER_VALUE1ST;
+ }
+ else {
+ break;
+ }
+ coder_high <<= 1;
+ ++coder_high;
+ coder_low <<= 1;
+ if (coder_high < coder_low) {
+ vector_clear(&tmpv);
+ return EC_CODER_WRONG_RANGE;
+ }
+ }
+ {
+#ifdef TXT_TOKENS
+// register u32 ndx;
+ predctrs[0] = *it;
+ if ((('a' <= *it) && (*it <= 'z')) || (('A' <= *it) && (*it <= 'Z'))) {
+ ++(predctrs[1]);
+ }
+ else {
+ predctrs[1] = 0;
+ }
+#else
+ register u32 ndx = predctrs[0] + 1;
+ predctrs[ndx + 8] = predctrs[ndx];
+ predctrs[ndx] = *it;
+ if (ndx == 8) {
+ predctrs[0] = 0;
+ }
+ else {
+ ++predctrs[0];
+ }
+#endif
+ }
+
+ }
+ vector_clear(&tmpv);
+ ++coder_opbits;
+ if (coder_low < CODER_VALUE1ST) {
+ if (writebits0(&bitvector_ptr, &bitvector_freebits, &coder_opbits, bitvector_end)) {
+ return EC_BUFFER_OVERFLOW;
+ }
+ }
+ else {
+ if (writebits1(&bitvector_ptr, &bitvector_freebits, &coder_opbits, bitvector_end)) {
+ return EC_BUFFER_OVERFLOW;
+ }
+ }
+ (*(bitvector_ptr)) <<= bitvector_freebits;
+ *dstlen = ((u32) bitvector_ptr - (u32) output + 1);
+ return EC_NO_ERROR;
+}
+
+/*******************************************************************************
+
+ DECOMPRESS FUNCTIONS
+
+*******************************************************************************/
+
+typedef struct
+{
+ u32 high;
+ u32 low;
+ u32 value;
+ u32 overread;
+} ipack_decompressor_values;
+
+typedef struct
+{
+ u8 freebits;
+ unsigned char *ptr;
+ unsigned char *end;
+} ipack_decompressor_bitvector;
+
+static u8 ipack_bitvector_R_get1(ipack_decompressor_bitvector * bv)
+{
+ u8 tmp;
+ if (bv->ptr == bv->end) {
+ bv->freebits = 0;
+ return 0;
+ }
+ tmp = (*(bv->ptr) >> bv->freebits) & 0x01;
+ if (!(bv->freebits)) {
+ bv->freebits = 7;
+ ++(bv->ptr);
+ }
+ else {
+ --(bv->freebits);
+ }
+ return tmp;
+}
+
+/* Decompress block
+ * returns non zero if fails
+ */
+static int ipack_armlib_decompress(void *model, unsigned char *input, unsigned char *output, unsigned long sourcelen, unsigned long dstlen)
+{
+ ARM_DataType *data;
+ register u32 coder_high = CODER_VALUEMAX - 1;
+ register u32 coder_low = 0;
+ register u32 coder_value = 0;
+ u32 coder_overread = 0;
+ ipack_decompressor_bitvector bitvector;
+ u32 lngth;
+ u32 i;
+ u32 cntbytes;
+ TokenType tkns[8];
+ TokenType *tptr;
+
+ ipack_nodetype *treeroot = ((ipack_model_type *) model)->tree_root_ptr;
+ PredictorType *predctrs = ((ipack_model_type *) model)->predictors_ptr;
+
+#ifdef IPACK_TREE_TO_CODE
+ TokenType(*treefunc) (ipack_nodetype *, u32, u32, ipack_probability_type *);
+
+ treefunc = ((ipack_model_type *) model)->tree_code;
+#endif
+
+
+ if (((ipack_model_type *) model)->ID[0] != 'i') {
+ return EC_NOT_IPMF_MODEL;
+ }
+ else if (((ipack_model_type *) model)->ID[1] != 'P') {
+ return EC_NOT_IPMF_MODEL;
+ }
+ else if (((ipack_model_type *) model)->ID[2] != 'M') {
+ return EC_NOT_IPMF_MODEL;
+ }
+ else if (((ipack_model_type *) model)->ID[3] != 'F') {
+ return EC_NOT_IPMF_MODEL;
+ }
+
+ bitvector.freebits = 7;
+ bitvector.ptr = input;
+ bitvector.end = input + sourcelen;
+
+ /*if(*(bitvector.ptr++) != 'H') {
+ return EC_NOT_HG_BLOCK;
+ } else if(*(bitvector.ptr++) != 'G') {
+ return EC_NOT_HG_BLOCK;
+ } */
+ bitvector.ptr++;
+ bitvector.ptr++;
+
+ data = (void *) output;
+ cntbytes = *(bitvector.ptr++);
+ cntbytes <<= 8;
+ cntbytes += *(bitvector.ptr++);
+
+ { //predictor reset
+ register PredictorType *ptr = predctrs;
+ register PredictorType *end = ptr + NUMBER_OF_PREDICTORS;
+ while (ptr < end) {
+ *(ptr++) = 0;
+ }
+ }
+ for (i = 0; i < CODER_VALUEBITS; ++i) {
+ coder_value <<= 1;
+ coder_value += ipack_bitvector_R_get1(&bitvector);
+ }
+ lngth = dstlen >> 2;
+ if (lngth > (cntbytes >> 2)) {
+ lngth = cntbytes >> 2;
+ }
+ for (i = 0; (i < lngth); ++i) {
+ TokenType itoken;
+ u32 j;
+ tptr = tkns;
+ for (j = 0; j < NUMBER_OF_TOKENS_PER_INSTRUCTION; ++j) {
+ ipack_probability_type prob;
+ u32 range = coder_high - coder_low + 1;
+
+#ifdef IPACK_TREE_TO_CODE
+ if (treefunc != NULL)
+ itoken = (*treefunc) (treeroot, coder_value - coder_low + 1, range, &prob);
+ else
+#endif
+ itoken = ipack_model_get_token_for_range(treeroot, coder_value - coder_low + 1, range, &prob);
+
+
+ if (prob.high == prob.low) {
+ return EC_CODER_WRONG_PROBABILITY;
+ }
+ coder_high = coder_low + ((range * prob.high) >> PROBABILITY_SHIFT) - 1;
+ coder_low += ((range * prob.low) >> PROBABILITY_SHIFT);
+ for (;;) {
+ if (coder_high < CODER_VALUEHLF) {
+ }
+ else if (CODER_VALUEHLF <= coder_low) {
+ coder_value -= CODER_VALUEHLF;
+ coder_high -= CODER_VALUEHLF;
+ coder_low -= CODER_VALUEHLF;
+ }
+ else if ((CODER_VALUE1ST <= coder_low) && (coder_high < CODER_VALUE3RD)) {
+ coder_value -= CODER_VALUE1ST;
+ coder_high -= CODER_VALUE1ST;
+ coder_low -= CODER_VALUE1ST;
+ }
+ else {
+ break;
+ }
+ coder_low <<= 1;
+ coder_high <<= 1;
+ ++(coder_high);
+ coder_value <<= 1;
+ if (bitvector.ptr == bitvector.end) {
+ bitvector.freebits = 0;
+ }
+ coder_value += ((*(bitvector.ptr) >> bitvector.freebits) & 0x01);
+ if (bitvector.freebits) {
+ --bitvector.freebits;
+ }
+ else {
+ bitvector.freebits = 7;
+ ++bitvector.ptr;
+ }
+ if (coder_high < coder_low) {
+ return EC_CODER_WRONG_RANGE;
+ }
+ if ((bitvector.ptr == bitvector.end) && !(bitvector.freebits)) {
+ if ((coder_overread++) > CODER_VALUEBITS) {
+ return EC_BUFFER_UNDERFLOW;
+ }
+ }
+ }
+ {
+#ifdef TXT_TOKENS
+// register u32 ndx;
+ predctrs[0] = itoken;
+ if ((('a' <= itoken) && (itoken <= 'z')) || (('A' <= itoken) && (itoken <= 'Z'))) {
+ ++(predctrs[1]);
+ }
+ else {
+ predctrs[1] = 0;
+ }
+
+#else
+ register u32 ndx = predctrs[0] + 1;
+ predctrs[ndx + 8] = predctrs[ndx];
+ predctrs[ndx] = itoken;
+ if (ndx == 8) {
+ predctrs[0] = 0;
+ }
+ else {
+ ++predctrs[0];
+ }
+#endif
+ }
+
+ (*(tptr++)) = itoken;
+ }
+ tptr = tkns;
+#ifndef __KERNEL__
+ if (ipack_glb_endian_X) {
+#ifdef TXT_TOKENS
+ (*data) = ((*tptr) << 24);
+ ++tptr;
+ (*data) |= ((*tptr) << 16);
+ ++tptr;
+ (*data) |= ((*tptr) << 8);
+ ++tptr;
+ (*data) |= (*tptr);
+ ++data;
+#else
+ (*data) = (((*tptr) & 0xf) << 12);
+ ++tptr;
+ (*data) |= ((*tptr) & 0xf);
+ ++tptr;
+ (*data) |= (((*tptr) & 0xf) << 28);
+ ++tptr;
+ (*data) |= (((*tptr) & 0xf) << 16);
+ ++tptr;
+ (*data) |= (((*tptr) & 0xf) << 8);
+ ++tptr;
+ (*data) |= (((*tptr) & 0xf) << 20);
+ ++tptr;
+ (*data) |= (((*tptr) & 0xf) << 24);
+ ++tptr;
+ (*data) |= (((*tptr) & 0xf) << 4);
+ ++data;
+#endif
+ }
+ else {
+#endif
+#ifdef TXT_TOKENS
+ (*data) = (*tptr);
+ ++tptr;
+ (*data) |= ((*tptr) << 8);
+ ++tptr;
+ (*data) |= ((*tptr) << 16);
+ ++tptr;
+ (*data) |= ((*tptr) << 24);
+ ++data;
+#else
+ (*data) = (((*tptr) & 0xf) << 20);
+ ++tptr;
+ (*data) |= (((*tptr) & 0xf) << 24);
+ ++tptr;
+ (*data) |= (((*tptr) & 0xf) << 4);
+ ++tptr;
+ (*data) |= (((*tptr) & 0xf) << 8);
+ ++tptr;
+ (*data) |= (((*tptr) & 0xf) << 16);
+ ++tptr;
+ (*data) |= (((*tptr) & 0xf) << 12);
+ ++tptr;
+ (*data) |= ((*tptr) & 0xf);
+ ++tptr;
+ (*data) |= (((*tptr) & 0xf) << 28);
+ ++data;
+#endif
+#ifndef __KERNEL__
+ }
+#endif
+ }
+ return EC_NO_ERROR;
+}
+
+static int ipack_armlib_estimate(void *model, unsigned char *input, unsigned long sourcelen, unsigned long *dstlen, unsigned long *readtime, unsigned long *writetime)
+{
+ int i, tmp, tmp2, max, maxi;
+ int cnt_cond[] = { 0, 0, 0, 0 };
+ int cnt_inst[] = { 0, 0, 0, 0 };
+
+ // TODO: make a more precise estimation!!!
+ *readtime = JFFS2_BBC_ZLIB_READ_TIME * 6;
+ *writetime = JFFS2_BBC_ZLIB_WRITE_TIME * 2;
+
+ if (sourcelen % 4 != 0) {
+ *dstlen = sourcelen;
+ return 0;
+ }
+ for (i = 0; i < sourcelen; i++, input++) {
+ tmp2 = tmp = *input;
+ tmp = ((tmp) & 0xf0) >> 4;
+ tmp2 = tmp2 & 0xf;
+ if (tmp == 14)
+ cnt_cond[i % 4]++;
+ if ((tmp2 == 2) || (tmp2 == 3))
+ cnt_inst[i % 4]++;
+ }
+ maxi = -1;
+ max = -1;
+ for (i = 0; i < 4; i++)
+ if (max < cnt_cond[i]) {
+ max = cnt_cond[i];
+ maxi = i;
+ }
+ /*jffs2_bbc_print("armlib_EST: %d/%d : %d/%d %d/%d %d/%d %d/%d",
+ cnt_cond[maxi],cnt_inst[maxi],
+ cnt_cond[0],cnt_inst[0],
+ cnt_cond[1],cnt_inst[1],
+ cnt_cond[2],cnt_inst[2],
+ cnt_cond[3],cnt_inst[3]); */
+
+ if (cnt_cond[maxi] < (sourcelen >> 4)) {
+ *dstlen = sourcelen;
+ }
+ else {
+ *dstlen = sourcelen / 3;
+ }
+
+ return 0;
+}
+
+static char *ipack_armlib_proc_info(void);
+static int ipack_armlib_proc_command(char *command);
+static void ipack_armlib_destroy_model(void **model);
+
+struct jffs2_bbc_compressor_type jffs2_bbc_armlib = {
+ "armlib",
+ 0x464d5069,
+ {0, 0, 0, 0},
+ NULL, // init
+ ipack_armlib_compressor_init, // init_model
+ ipack_armlib_destroy_model, // destroy_model
+ ipack_armlib_compressor_deinit, // deinit
+ ipack_armlib_compress,
+ ipack_armlib_estimate,
+ ipack_armlib_decompress,
+ ipack_armlib_proc_info,
+ ipack_armlib_proc_command
+};
+
+
+static char *ipack_armlib_proc_info()
+{
+#ifdef IPACK_TREE_TO_CODE
+#ifdef IPACK_AUTO_TREE_TO_CODE
+ return "automatic tree to code conversion";
+#else
+ return "manual tree to code conversion possibility";
+#endif
+#else
+ return "tree in memory version";
+#endif
+}
+
+static int ipack_armlib_proc_command(char *command)
+{
+ struct jffs2_bbc_model_list_node *model;
+ ipack_model_type *armlib_model;
+
+ if ((*command == 'g') || (*command == 'G')) {
+ jffs2_bbc_print1("Converting tree(s) to ARM code... (keeping original)\n");
+ model = jffs2_bbc_armlib.models;
+ if (model == NULL)
+ jffs2_bbc_print1("no model found!\n");
+ while (model != NULL) {
+ armlib_model = model->model;
+ if (armlib_model == NULL) {
+ jffs2_bbc_print1("Error: NULL model!\n");
+ }
+ else {
+ ipack_armlib_convert_tree_to_code(armlib_model, IPACK_TREE_CONVERT_KEEP);
+ }
+ model = model->next_compr_model;
+ }
+ }
+ else if ((*command == 'r') || (*command == 'R')) {
+ jffs2_bbc_print1("Converting tree(s) to ARM code... (deleting original)\n");
+ model = jffs2_bbc_armlib.models;
+ if (model == NULL)
+ jffs2_bbc_print1("no model found!\n");
+ while (model != NULL) {
+ armlib_model = model->model;
+ if (armlib_model == NULL) {
+ jffs2_bbc_print1("Error: NULL model!\n");
+ }
+ else {
+ //armlib_model->tree_code = ipack_tree_to_code(armlib_model, &tree_size);
+ //jffs2_bbc_print("Convertation done. Code size=%d\n",tree_size);
+ ipack_armlib_convert_tree_to_code(armlib_model, IPACK_TREE_CONVERT_REPLACE);
+ }
+ model = model->next_compr_model;
+ }
+ }
+ else if ((*command == 'c') || (*command == 'C')) {
+ jffs2_bbc_print1("Deleting ARM representation of the tree(s)...\n");
+ model = jffs2_bbc_armlib.models;
+ if (model == NULL)
+ jffs2_bbc_print1("no model found!\n");
+ while (model != NULL) {
+ armlib_model = model->model;
+ if (armlib_model == NULL) {
+ jffs2_bbc_print1("Error: NULL model!\n");
+ }
+ else {
+ if (armlib_model->tree_code == NULL) {
+ jffs2_bbc_print1("already deleted.\n");
+ }
+ else {
+ if (armlib_model->tree_root_ptr == NULL) {
+ jffs2_bbc_print1("cannot delete this ARM tree - original tree has deleted\n");
+ }
+ else {
+ jffs2_bbc_print1("deleting...");
+ jffs2_bbc_free(armlib_model->tree_code);
+ armlib_model->tree_code = NULL;
+ jffs2_bbc_print1("done.\n");
+ }
+ }
+ }
+ model = model->next_compr_model;
+ }
+ }
+ else if (*command == '?') {
+ jffs2_bbc_print1("ARMLIB commands:\n");
+ jffs2_bbc_print1(" g: convert TREEs to ARM code and keep the original\n");
+ jffs2_bbc_print1(" r: convert TREEs to ARM code and remove the original\n");
+ jffs2_bbc_print1(" c: delete the original TREEs - if there is any\n");
+ }
+ else {
+ jffs2_bbc_print1("Unknown command.\n");
+ }
+ return 0;
+}
+
+static void ipack_armlib_destroy_model(void **model)
+{
+ ipack_model_type *model_img;
+
+ model_img = *model;
+ if (model_img == NULL) {
+ jffs2_bbc_print1("jffs2.bbc: armlib: NULL model at destoying model!\n");
+ return;
+ }
+ if (model_img->tree_code != NULL) {
+ //jffs2_bbc_print1("jffs2.bbc: armlib: debug: freeing code...\n");
+ jffs2_bbc_free(model_img->tree_code);
+ model_img->tree_code = NULL;
+ }
+ if (model_img->tree_root_ptr != NULL) {
+ //jffs2_bbc_print1("jffs2.bbc: armlib: debug: freeing tree...\n");
+ jffs2_bbc_free(model_img->tree_root_ptr);
+ model_img->tree_root_ptr = NULL;
+ }
+
+ jffs2_bbc_free(model_img);
+ *model = NULL;
+}
+
+struct jffs2_bbc_compressor_type *jffs2_bbc_armlib_init(int mode)
+{
+ if (jffs2_bbc_register_compressor(&jffs2_bbc_armlib) == 0)
+ return &jffs2_bbc_armlib;
+ else
+ return NULL;
+}
+
+void jffs2_bbc_armlib_deinit(void)
+{
+ jffs2_bbc_unregister_compressor(&jffs2_bbc_armlib);
+}
+
+/*END OF ARMLIB*/
Index: linux-2.4.35.4/fs/jffs2/jffs2_bbc_framework.c
===================================================================
--- /dev/null
+++ linux-2.4.35.4/fs/jffs2/jffs2_bbc_framework.c
@@ -0,0 +1,1324 @@
+/*
+ * JFFS2-BBC: Compression Framework
+ *
+ * $Id: 301-jffs-compression,v 1.1 2005/03/26 10:33:31 wbx Exp $
+ *
+ * Copyright (C) 2004, Ferenc Havasi
+ *
+ * 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.
+ *
+ */
+
+/* USE JFFS2_BBC_STANDALONE define if you don't want to compile without JFFS2 */
+
+//#define DEBUG_COMPRESSORS
+//#define DEBUG_SHOW_BLOCK_SIZES
+
+#define JFFS2_BBC_STAT_BUFF_SIZE 8000
+
+#ifndef __KERNEL__
+
+#include <stdio.h>
+#include <malloc.h>
+typedef unsigned long uint32_t;
+
+#else
+
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/vmalloc.h>
+
+#endif
+
+#define JFFS2_BBC_ZLIB_BLOCK_SIGN_0 (120)
+#define JFFS2_BBC_ZLIB_BLOCK_SIGN_1 (94)
+
+#define JFFS2_BBC_DUMMY_BLOCKSIGN_0 (0x54)
+#define JFFS2_BBC_DUMMY_BLOCKSIGN_1 (0x01)
+
+#ifndef NULL
+#define NULL ((void*)(0))
+#endif
+
+#include "jffs2_bbc_framework.h"
+
+/*********************************************************************
+ * Global data *
+ *********************************************************************/
+
+static int jffs2_bbc_compression_mode = JFFS2_BBC_ZLIB_MODE;
+static struct jffs2_bbc_compressor_type *jffs2_bbc_manual_compressor = NULL;
+static struct jffs2_bbc_compressor_type *jffs2_bbc_compressors = NULL;
+static struct jffs2_bbc_model_list_node *jffs2_bbc_model_list = NULL;
+static void *last_sb = NULL; /* previously activated sb */
+
+/*********************************************************************
+ * Compressor initialization *
+ *********************************************************************/
+
+#ifndef JFFS2_BBC_STANDALONE
+
+#if !defined(__KERNEL__) || defined(CONFIG_JFFS2_BBC_ARMLIB)
+struct jffs2_bbc_compressor_type *jffs2_bbc_armlib_init(void);
+void jffs2_bbc_armlib_deinit(void);
+#endif
+
+#if !defined(__KERNEL__) || defined(CONFIG_JFFS2_BBC_LZO)
+struct jffs2_bbc_compressor_type *jffs2_bbc_lzo_init(void);
+void jffs2_bbc_lzo_deinit(void);
+#endif
+
+#if !defined(__KERNEL__) || defined(CONFIG_JFFS2_BBC_LZSS)
+struct jffs2_bbc_compressor_type *jffs2_bbc_lzss_init(void);
+void jffs2_bbc_lzss_deinit(void);
+#endif
+
+#if !defined(__KERNEL__) || defined(CONFIG_JFFS2_BBC_LZARI)
+struct jffs2_bbc_compressor_type *jffs2_bbc_lzari_init(void);
+void jffs2_bbc_lzari_deinit(void);
+#endif
+
+#if !defined(__KERNEL__) || defined(CONFIG_JFFS2_BBC_LZHD)
+struct jffs2_bbc_compressor_type *jffs2_bbc_lzhd_init(void);
+void jffs2_bbc_lzhd_deinit(void);
+#endif
+
+void jffs2_bbc_compressor_init()
+{
+#if !defined(__KERNEL__) || defined(CONFIG_JFFS2_BBC_ARMLIB)
+ jffs2_bbc_armlib_init();
+#endif
+#if !defined(__KERNEL__) || defined(CONFIG_JFFS2_BBC_LZO)
+ jffs2_bbc_lzo_init();
+#endif
+#if !defined(__KERNEL__) || defined(CONFIG_JFFS2_BBC_LZSS)
+ jffs2_bbc_lzss_init();
+#endif
+#if !defined(__KERNEL__) || defined(CONFIG_JFFS2_BBC_LZARI)
+ jffs2_bbc_lzari_init();
+#endif
+#if !defined(__KERNEL__) || defined(CONFIG_JFFS2_BBC_LZHD)
+ jffs2_bbc_lzhd_init();
+#endif
+}
+
+void jffs2_bbc_compressor_deinit()
+{
+#if !defined(__KERNEL__) || defined(CONFIG_JFFS2_BBC_LZHD)
+ jffs2_bbc_lzhd_deinit();
+#endif
+#if !defined(__KERNEL__) || defined(CONFIG_JFFS2_BBC_LZARI)
+ jffs2_bbc_lzari_deinit();
+#endif
+#if !defined(__KERNEL__) || defined(CONFIG_JFFS2_BBC_LZSS)
+ jffs2_bbc_lzss_deinit();
+#endif
+#if !defined(__KERNEL__) || defined(CONFIG_JFFS2_BBC_LZO)
+ jffs2_bbc_lzo_deinit();
+#endif
+#if !defined(__KERNEL__) || defined(CONFIG_JFFS2_BBC_ARMLIB)
+ jffs2_bbc_armlib_deinit();
+#endif
+}
+
+#endif
+
+#ifndef JFFS2_BBC_STANDALONE
+
+/*********************************************************************
+ * ZLIB COMPRESSOR *
+ *********************************************************************/
+
+extern int jffs2_zlib_compress2(unsigned char *data_in, unsigned char *cpage_out, uint32_t * sourcelen, uint32_t * dstlen);
+extern void jffs2_zlib_decompress2(unsigned char *data_in, unsigned char *cpage_out, uint32_t srclen, uint32_t destlen);
+
+static int jffs2_bbc_zlib_compress(void *model, unsigned char *input, unsigned char *output, unsigned long *sourcelen, unsigned long *dstlen)
+{
+ return jffs2_zlib_compress2(input, output, sourcelen, dstlen);
+}
+
+static int jffs2_bbc_zlib_decompress(void *model, unsigned char *input, unsigned char *output, unsigned long sourcelen, unsigned long dstlen)
+{
+ jffs2_zlib_decompress2(input, output, sourcelen, dstlen);
+ return 0;
+}
+
+static int jffs2_bbc_zlib_estimate(void *model, unsigned char *input, unsigned long sourcelen, unsigned long *dstlen, unsigned long *readtime, unsigned long *writetime)
+{
+ *dstlen = sourcelen * 65 / 100;
+ *readtime = JFFS2_BBC_ZLIB_READ_TIME;
+ *writetime = JFFS2_BBC_ZLIB_WRITE_TIME;
+ return 0;
+}
+
+static struct jffs2_bbc_compressor_type jffs2_bbc_zlib = {
+ "zlib",
+ 0,
+ {JFFS2_BBC_ZLIB_BLOCK_SIGN_0, JFFS2_BBC_ZLIB_BLOCK_SIGN_1, 0, 0},
+ NULL,
+ NULL,
+ NULL,
+ NULL,
+ jffs2_bbc_zlib_compress,
+ jffs2_bbc_zlib_estimate,
+ jffs2_bbc_zlib_decompress,
+ NULL,
+ NULL,
+ 1
+};
+
+static struct jffs2_bbc_compressor_type *jffs2_bbc_original_compressor = &jffs2_bbc_zlib;
+
+#endif
+
+/*********************************************************************
+ * Compression mode handling *
+ *********************************************************************/
+
+int jffs2_bbc_get_compression_mode(void)
+{
+ return jffs2_bbc_compression_mode;
+}
+
+void jffs2_bbc_set_compression_mode(int mode)
+{
+ jffs2_bbc_compression_mode = mode;
+}
+
+void jffs2_bbc_set_manual_compressor(struct jffs2_bbc_compressor_type *c)
+{
+ jffs2_bbc_manual_compressor = c;
+ jffs2_bbc_set_compression_mode(JFFS2_BBC_MANUAL_MODE);
+}
+
+int jffs2_bbc_set_manual_compressor_by_name(char *name)
+{
+ struct jffs2_bbc_compressor_type *l;
+ int i;
+
+ l = jffs2_bbc_compressors;
+ while (l != NULL) {
+ for (i = 0; i < 1000; i++) {
+ if (l->name[i] == 0) {
+ jffs2_bbc_set_manual_compressor(l);
+ return 0;
+ }
+ else if (name[i] == 0)
+ i = 1000;
+ else if (name[i] != l->name[i])
+ i = 1000;
+ }
+ l = l->next;
+ }
+ jffs2_bbc_set_manual_compressor(NULL);
+ return 1;
+}
+
+static struct jffs2_bbc_compressor_type *jffs2_bbc_get_compressor_by_name(char *name)
+{
+ struct jffs2_bbc_compressor_type *l;
+ int i;
+
+#ifndef JFFS2_BBC_STANDALONE
+ l = jffs2_bbc_original_compressor;
+ for (i = 0; i < 1000; i++) {
+ if (l->name[i] == 0) {
+ return l;
+ }
+ else if (name[i] == 0)
+ i = 1000;
+ else if (name[i] != l->name[i])
+ i = 1000;
+ }
+#endif
+
+ l = jffs2_bbc_compressors;
+ while (l != NULL) {
+ for (i = 0; i < 1000; i++) {
+ if (l->name[i] == 0) {
+ return l;
+ }
+ else if (name[i] == 0)
+ i = 1000;
+ else if (name[i] != l->name[i])
+ i = 1000;
+ }
+ l = l->next;
+ }
+
+ return NULL;
+}
+
+int jffs2_bbc_disable_compressor_by_name(char *name)
+{
+ struct jffs2_bbc_compressor_type *l;
+
+ l = jffs2_bbc_get_compressor_by_name(name);
+ if (l == NULL) return 1;
+ l->enabled = 0;
+ return 0;
+}
+
+int jffs2_bbc_enable_compressor_by_name(char *name)
+{
+ struct jffs2_bbc_compressor_type *l;
+
+ l = jffs2_bbc_get_compressor_by_name(name);
+ if (l == NULL) return 1;
+ l->enabled = 1;
+ return 0;
+}
+
+void jffs2_bbc_compressor_command_by_name(char *name_and_command)
+{
+ struct jffs2_bbc_compressor_type *l;
+ int i;
+
+ l = jffs2_bbc_compressors;
+ while (l != NULL) {
+ for (i = 0; i < 1000; i++) {
+ if (l->name[i] == 0) {
+ if (name_and_command[i] != ':') {
+ jffs2_bbc_print1("jffs2.bbc: ':' missing after compressor name\n");
+ }
+ else {
+ if (l->proc_command != NULL)
+ l->proc_command(name_and_command + i + 1);
+ }
+ i = 1000;
+ return;
+ }
+ else if (name_and_command[i] == 0) {
+ i = 1000;
+ }
+ else if (name_and_command[i] != l->name[i]) {
+ i = 1000;
+ }
+ }
+ l = l->next;
+ }
+}
+
+struct jffs2_bbc_compressor_type *jffs2_bbc_get_manual_compressor(void)
+{
+ if (jffs2_bbc_get_compression_mode() != JFFS2_BBC_MANUAL_MODE) {
+ jffs2_bbc_manual_compressor = NULL;
+ }
+ return jffs2_bbc_manual_compressor;
+}
+
+/*********************************************************************
+ * Compressor handling *
+ *********************************************************************/
+
+struct jffs2_bbc_compressor_type *jffs2_bbc_get_compressor_list(void)
+{
+ return jffs2_bbc_compressors;
+}
+
+struct jffs2_bbc_model_list_node *jffs2_bbc_get_model_list(void)
+{
+ return jffs2_bbc_model_list;
+}
+
+int jffs2_bbc_register_compressor(struct jffs2_bbc_compressor_type *c)
+{
+ struct jffs2_bbc_compressor_type *l;
+ struct jffs2_bbc_model_list_node *l2;
+ int model_found = 0;
+
+ l = jffs2_bbc_compressors;
+ /* Check for confilcts */
+ while (l != NULL) {
+ c->name[15] = 0;
+ /*if (strcmp(c->name,l->name)==0) {
+ jffs2_bbc_print1("jffs2.bbc: compressor is already loaded.");
+ return -1;
+ } */
+ if ((l->model_file_sign == c->model_file_sign) && (c->model_file_sign != 0)) {
+ jffs2_bbc_print1("jffs2.bbc: already used model file sign. fail.");
+ return -1;
+ }
+ l = l->next;
+ }
+ /* Search and initialize model */
+ c->models = NULL;
+ c->mounted = 0;
+ if (c->init != NULL) {
+ if (c->init() != 0) {
+ jffs2_bbc_print2("jffs2.bbc: cannot initialize compressor %s.\n", c->name);
+ return -1;
+ }
+ }
+ if (c->model_file_sign != 0) {
+ l2 = jffs2_bbc_model_list;
+ while (1) {
+ if (l2 == NULL)
+ break;
+ if (c->model_file_sign == l2->sign) {
+ if (l2->compressor != NULL) {
+ jffs2_bbc_print2("jffs2.bbc: register for %s: BUG, model file already reserved!!!!\n", c->name);
+ }
+ else {
+ if (c->init_model(&(l2->model)) != 0) {
+ jffs2_bbc_print2("jffs2.bbc: cannot initialize compressor %s for a model", c->name);
+ }
+ else {
+ l2->compressor = c;
+ l2->next_compr_model = c->models;
+ c->models = l2;
+ c->mounted++;
+ model_found++;
+ }
+ }
+ }
+ l2 = l2->next_model;
+ }
+ /*if (model_found==0) {
+ jffs2_bbc_print2("jffs2.bbc: no macthing model file found for %s at this time (maybe later)\n",c->name);
+ } */
+ }
+ /* Insert to the end of the compressor list */
+ c->enabled = 1;
+ c->buffer = NULL;
+ c->buffer_size = 0;
+ c->stat_compr_orig = c->stat_compr_new = c->stat_decompr = 0;
+ c->next = NULL;
+ if (jffs2_bbc_compressors == NULL) {
+ jffs2_bbc_compressors = c;
+ }
+ else {
+ l = jffs2_bbc_compressors;
+ while (l->next != NULL)
+ l = l->next;
+ l->next = c;
+ }
+ return 0;
+}
+
+int jffs2_bbc_unregister_compressor(struct jffs2_bbc_compressor_type *c)
+{
+ struct jffs2_bbc_compressor_type *l;
+ struct jffs2_bbc_model_list_node *l2;
+
+ if (c->mounted != 0) {
+ jffs2_bbc_print1("jffs2.bbc: Compressor is in use. Sorry.");
+ return -1;
+ }
+ if (jffs2_bbc_compressors == NULL) {
+ jffs2_bbc_print1("jffs2.bbc: unregister: empty list.");
+ return -1;
+ }
+ else if (jffs2_bbc_compressors == c) {
+ if (c->deinit != NULL)
+ c->deinit();
+ jffs2_bbc_compressors = c->next;
+ }
+ else {
+ l = jffs2_bbc_compressors;
+ while (l->next != c) {
+ if (l->next == NULL) {
+ jffs2_bbc_print2("jffs2.bbc: unregister: cannot find compressor %s in the list.", c->name);
+ return -1;
+ }
+ l = l->next;
+ }
+ if (c->deinit != NULL)
+ c->deinit();
+ l->next = c->next;
+ }
+ if (c->buffer != NULL) {
+ jffs2_bbc_free(c->buffer);
+ c->buffer = NULL;
+ c->buffer_size = 0;
+ }
+
+ l2 = jffs2_bbc_model_list;
+ while (l2 != NULL) {
+ if (l2->compressor == c) {
+ jffs2_bbc_print1("jffs2.bbc: unregister: BUG: model found!!!");
+ l2->compressor = NULL;
+ l2->next_compr_model = NULL;
+ }
+ l2 = l2->next_model;
+ }
+
+ return 0;
+}
+
+int jffs2_bbc_model_new(void *sb, int i_num, void *model)
+{
+ struct jffs2_bbc_model_list_node *node;
+ struct jffs2_bbc_compressor_type *l;
+ char block_sign[2];
+
+ int sign;
+
+ /* check for conflicts... */
+ sign = *((int *) model);
+ block_sign[0] = *(((char *) model) + 4);
+ block_sign[1] = *(((char *) model) + 5);
+ node = jffs2_bbc_model_list;
+ while (node != NULL) {
+ if ((node->block_sign[0] == block_sign[0]) && (node->block_sign[1] == block_sign[1]) && (node->sb == sb)) {
+ //jffs2_bbc_print2("jffs2.bbc: model_new: model conflict (inode=%d)!\n",i_num);
+ return -1;
+ }
+ node = node->next_model;
+ }
+
+ /* insertion */
+ node = jffs2_bbc_malloc_small((long)sizeof(struct jffs2_bbc_model_list_node));
+ node->sb = sb;
+ node->model = model;
+ node->sign = *((int *) model);
+ node->block_sign[0] = *(((char *) model) + 4);
+ node->block_sign[1] = *(((char *) model) + 5);
+ node->inode = i_num;
+ node->next_model = jffs2_bbc_model_list;
+ node->compressor = NULL;
+ node->stat_decompr = 0;
+ node->next_compr_model = NULL;
+ jffs2_bbc_model_list = node;
+
+ /* search for matching compressor */
+ l = jffs2_bbc_compressors;
+ while (l != NULL) {
+ if (l->model_file_sign == sign) {
+ //jffs2_bbc_print2("jffs2.bbc: compressor for model found: %s ",l->name);
+ if (l->init_model(&(node->model)) != 0) {
+ jffs2_bbc_print1("jffs2.bbc: cannot initialize compressor for a model");
+ }
+ else {
+ l->mounted++;
+ node->compressor = l;
+ node->next_compr_model = l->models;
+ l->models = node;
+ }
+ break;
+ }
+ l = l->next;
+ }
+ return 0;
+}
+
+static void jffs2_bbc_model_del_from_compressor(struct jffs2_bbc_model_list_node *node)
+{
+ struct jffs2_bbc_model_list_node *l;
+
+ if (node->model != NULL) {
+ if (node->compressor != NULL) {
+ if (node->compressor->destroy_model == NULL) {
+ jffs2_bbc_free(node->model);
+ node->model = NULL;
+ }
+ else {
+ node->compressor->destroy_model(&(node->model));
+ if (node->model != NULL)
+ jffs2_bbc_print1("jffs2.bbc: warning: not NULL model after destroying!\n");
+ }
+ }
+ }
+
+ if (node->compressor == NULL) {
+ jffs2_bbc_print1("jffs2.bbc: jffs2_bbc_model_del_from_compressor: no compressor!\n");
+ return;
+ }
+ l = node->compressor->models;
+ if (l == NULL) {
+ jffs2_bbc_print1("jffs2.bbc: jffs2_bbc_model_del_from_compressor error, models=NULL!\n");
+ return;
+ }
+ if (l == node) {
+ node->compressor->models = node->next_compr_model;
+ node->compressor->mounted--;
+ return;
+ }
+ while (1) {
+ if (l->next_compr_model == node) {
+ l->next_compr_model = node->next_compr_model;
+ node->compressor->mounted--;
+ return;
+ }
+ l = l->next_compr_model;
+ if (l == NULL) {
+ jffs2_bbc_print1("jffs2.bbc: jffs2_bbc_model_del_from_compressor: not found\n");
+ return;
+ }
+ }
+}
+
+void jffs2_bbc_model_del(void *sb)
+{
+ struct jffs2_bbc_model_list_node *l, *l2;
+
+ l = jffs2_bbc_model_list;
+ if (l == NULL)
+ return;
+ if (l->sb == sb) {
+ jffs2_bbc_model_list = l->next_model;
+ jffs2_bbc_model_del_from_compressor(l);
+ jffs2_bbc_free_small(l);
+ jffs2_bbc_model_del(sb);
+ return;
+ }
+ while (1) {
+ if (l->next_model == NULL) {
+ break;
+ }
+ if (l->next_model->sb == sb) {
+ l2 = l->next_model;
+ l->next_model = l->next_model->next_model;
+ jffs2_bbc_model_del_from_compressor(l2);
+ jffs2_bbc_free_small(l2);
+ jffs2_bbc_model_del(sb);
+ return;
+ }
+ l = l->next_model;
+ }
+ last_sb = NULL;
+}
+
+void jffs2_bbc_model_set_act_sb(void *sb)
+{
+ last_sb = sb;
+}
+
+void *jffs2_bbc_model_get_act_sb(void)
+{
+ return last_sb;
+}
+
+void *jffs2_bbc_model_get_newest(struct jffs2_bbc_compressor_type *compressor)
+{
+ struct jffs2_bbc_model_list_node *m, *best_m;
+ int max_sign, sign;
+
+ if (compressor == NULL) {
+ jffs2_bbc_print1("jffs2.bbc: jffs2_bbc_model_get: NULL!!\n");
+ return NULL;
+ }
+
+ best_m = NULL;
+ max_sign = -1;
+ m = compressor->models;
+ while (m != NULL) {
+ if (m->sb == last_sb) {
+ sign = (int) (m->block_sign[0]) * 256 + (int) (m->block_sign[1]);
+ if (sign > max_sign) {
+ max_sign = sign;
+ best_m = m;
+ }
+ }
+ m = m->next_compr_model;
+ }
+ if (best_m != NULL)
+ return best_m->model;
+ else
+ return NULL;
+}
+
+/*********************************************************************
+ * Statistics *
+ *********************************************************************/
+
+static char *jffs2_bbc_stat_buff = NULL;
+
+char *jffs2_bbc_get_model_stats(void)
+{
+ char *b;
+ struct jffs2_bbc_model_list_node *m;
+ struct jffs2_bbc_compressor_type *c;
+
+ if (jffs2_bbc_stat_buff == NULL)
+ jffs2_bbc_stat_buff = jffs2_bbc_malloc(8000);
+
+ b = jffs2_bbc_stat_buff;
+
+ b += sprintf(b, "Loaded compressors:");
+ c = jffs2_bbc_compressors;
+ while (c != NULL) {
+ b += sprintf(b, "\n %s (%d) ", c->name, c->enabled);
+ if (c->model_file_sign != 0) {
+ b += sprintf(b, "m_sign=%d ", c->model_file_sign);
+ b += sprintf(b, "models=");
+ m = c->models;
+ while (m != NULL) {
+ b += sprintf(b, "(inode=%d)", m->inode);
+ m = m->next_compr_model;
+ }
+ }
+ else {
+ b += sprintf(b, "b_sign=(%d,%d) nomodel", (int) (c->block_sign[0]), (int) (c->block_sign[1]));
+ }
+ if (c->proc_info != NULL) {
+ b += sprintf(b, "\n %s", c->proc_info());
+ }
+ c = c->next;
+ }
+
+ m = jffs2_bbc_model_list;
+
+ if (m == NULL) {
+ b += sprintf(b, "\nPresent models: NONE\n");
+ }
+ else {
+ b += sprintf(b, "\nPresent models:\n");
+ while (m != NULL) {
+ b += sprintf(b, " b_sign=(%d,%d),inode=%d,decompr=%d", (int) (m->block_sign[0]), (int) (m->block_sign[1]), m->inode, m->stat_decompr);
+ if (m->compressor == NULL)
+ b += sprintf(b, ",compressor=NULL\n");
+ else
+ b += sprintf(b, ",compressor=%s\n", m->compressor->name);
+ m = m->next_model;
+ }
+ }
+
+ return jffs2_bbc_stat_buff;
+}
+
+/*********************************************************************
+ * Memory handling, debug *
+ *********************************************************************/
+
+static int jffs2_bbc_mem_counter = 0;
+
+#ifdef __KERNEL__
+
+void *jffs2_bbc_malloc(long size)
+{
+ void *addr = vmalloc(size);
+ if (addr != NULL)
+ jffs2_bbc_mem_counter++;
+ else {
+ jffs2_bbc_print2("DEBUG: not enough memory (%ld)\n", size);
+ }
+ return addr;
+}
+
+void jffs2_bbc_free(void *addr)
+{
+ jffs2_bbc_mem_counter--;
+ vfree(addr);
+}
+
+void *jffs2_bbc_malloc_small(long size)
+{
+ void *addr;
+ addr = kmalloc(size, 0);
+ if (addr != NULL)
+ jffs2_bbc_mem_counter++;
+ return addr;
+}
+
+void jffs2_bbc_free_small(void *addr)
+{
+ jffs2_bbc_mem_counter--;
+ kfree(addr);
+}
+
+#else
+
+void *jffs2_bbc_malloc(long size)
+{
+ void *addr = malloc(size);
+ if (addr != NULL)
+ jffs2_bbc_mem_counter++;
+ return addr;
+}
+
+void jffs2_bbc_free(void *addr)
+{
+ jffs2_bbc_mem_counter--;
+ free(addr);
+}
+
+void *jffs2_bbc_malloc_small(long size)
+{
+ return jffs2_bbc_malloc(size);
+}
+
+void jffs2_bbc_free_small(void *addr)
+{
+ jffs2_bbc_free(addr);
+}
+
+#endif
+
+int jffs2_bbc_test_memory_counter(int verbose)
+{
+ if (verbose > 0) {
+ jffs2_bbc_print2("jffs2.bbc: mem_counter=%d!\n", jffs2_bbc_mem_counter);
+ }
+ return jffs2_bbc_mem_counter;
+}
+
+int jffs2_bbc_get_memory_counter(void)
+{
+ return jffs2_bbc_mem_counter;
+}
+
+static char mem_stat[200];
+
+char *jffs2_bbc_get_mem_stats(void)
+{
+ sprintf(mem_stat, "Memcounter=%d\n", jffs2_bbc_mem_counter);
+ return mem_stat;
+}
+
+void jffs2_bbc_print_flush(void)
+{
+#ifdef __KERNEL__
+ return;
+#else
+ fflush(stdout);
+ fflush(stderr);
+#endif
+}
+
+/*********************************************************************
+ * FRAMEWORK - ZLIB REPLACEMENT *
+ *********************************************************************/
+
+#ifndef JFFS2_BBC_STANDALONE
+
+/* Temorary buffers */
+static char stat_str[JFFS2_BBC_STAT_BUFF_SIZE];
+static int tmp_buffer_size = 0;
+static char *tmp_buffer = NULL;
+
+/* Statistic - used by /proc/jffs2_bbc and mkfs.jffs2 */
+char *jffs2_bbc_get_compr_stats(void)
+{
+ struct jffs2_bbc_compressor_type *l;
+ char *s = stat_str;
+
+ s += sprintf(s, "Compression statistics:\n");
+ l = jffs2_bbc_original_compressor;
+ //s += sprintf(s, " zlib: compr=%d/%d decompr=%d\n", stat_zlib_compr_new, stat_zlib_compr_orig, stat_zlib_decompr);
+ s += sprintf(s, " %s: compr=%d/%d decompr=%d\n", l->name, l->stat_compr_new, l->stat_compr_orig, l->stat_decompr);
+ l = jffs2_bbc_get_compressor_list();
+ while (l != NULL) {
+ s += sprintf(s, " %s: compr=%d/%d decompr=%d\n", l->name, l->stat_compr_new, l->stat_compr_orig, l->stat_decompr);
+ l = l->next;
+ }
+ return stat_str;
+}
+
+static void jffs2_bbc_buffer_fill(unsigned char *buff, int size)
+{
+ for (; size > 0; size--, buff++)
+ *buff = 255;
+}
+
+
+static int jffs2_bbc_update_compr_buf(unsigned long size)
+{
+ struct jffs2_bbc_compressor_type *l;
+
+ if (size < 5000)
+ size = 5000;
+ if (tmp_buffer == NULL) {
+ tmp_buffer = jffs2_bbc_malloc(size);
+ jffs2_bbc_buffer_fill(tmp_buffer, size);
+ tmp_buffer_size = size;
+ }
+ else if (tmp_buffer_size < size) {
+ jffs2_bbc_free(tmp_buffer);
+ tmp_buffer = jffs2_bbc_malloc(size);
+ jffs2_bbc_buffer_fill(tmp_buffer, size);
+ tmp_buffer_size = size;
+ }
+ l = jffs2_bbc_get_compressor_list();
+ while (l != NULL) {
+ if (l->buffer == NULL) {
+ l->buffer_size = size;
+ l->buffer = jffs2_bbc_malloc(size);
+ jffs2_bbc_buffer_fill(l->buffer, size);
+ }
+ else if (l->buffer_size < size) {
+ jffs2_bbc_free(l->buffer);
+ l->buffer_size = size;
+ l->buffer = jffs2_bbc_malloc(size);
+ jffs2_bbc_buffer_fill(l->buffer, size);
+ }
+ l = l->next;
+ }
+ return 0;
+}
+
+#ifdef DEBUG_COMPRESSORS
+
+static unsigned char *debug_tmp_buff = NULL;
+static long debug_orig_srclen = -1;
+static long debug_orig_dstlen = -1;
+static int debug_mem_counter = -1;
+
+
+void debug_before_compress(struct jffs2_bbc_compressor_type *c, void *model, unsigned char *input, unsigned char *output, long *sourcelen, long *dstlen)
+{
+
+ debug_orig_srclen = *sourcelen; // for buffer overflow test
+ debug_orig_dstlen = *dstlen; // for buffer overflow test
+ output[debug_orig_dstlen + 1] = 255;
+
+ debug_mem_counter = jffs2_bbc_get_memory_counter(); // for memory guard
+}
+
+void debug_after_compress(struct jffs2_bbc_compressor_type *c, int back, void *model, unsigned char *input, unsigned char *output, long *sourcelen, long *dstlen)
+{
+ long dst_len = *dstlen;
+ long src_len = *sourcelen;
+ int i;
+
+ // Memory guard
+ if (debug_mem_counter != jffs2_bbc_get_memory_counter()) {
+ jffs2_bbc_print4("!!!!!!!! %s error: possible COMPRESSOR MEMORY LEAK: %d->%d\n", c->name, debug_mem_counter, jffs2_bbc_get_memory_counter());
+ debug_mem_counter = jffs2_bbc_get_memory_counter();
+ }
+
+ // Buffer overflow test
+ if (output[debug_orig_dstlen + 1] != 255) {
+ jffs2_bbc_print7("!!!!!!!! %s error: BUFFER OVERFLOW !!!!!!!!!!!! b[%d]=%d (srclen=%d dstlen=%d, back=%d)\n", c->name, (int) (debug_orig_dstlen + 1), (int) (output[debug_orig_dstlen + 1]), (int) (debug_orig_srclen), (int) (*dstlen), back);
+ }
+
+ // Decompression check
+ if (back == 0) {
+ if (debug_tmp_buff == NULL)
+ debug_tmp_buff = jffs2_bbc_malloc(17000);
+ for (i = 0; i < src_len; i++) debug_tmp_buff[i] = 0xf6;
+ c->decompress(model, output, debug_tmp_buff, dst_len, src_len);
+ // Memory guard for decompressor
+ if (debug_mem_counter != jffs2_bbc_get_memory_counter()) {
+ jffs2_bbc_print4("!!!!!!!! %s error: possible DECOMPRESSOR MEMORY LEAK: %d->%d\n", c->name, debug_mem_counter, jffs2_bbc_get_memory_counter());
+ debug_mem_counter = jffs2_bbc_get_memory_counter();
+ }
+
+ for (i = 0; i < src_len; i++)
+ if (input[i] != debug_tmp_buff[i]) {
+ jffs2_bbc_print7("!!!!!!!! %s error: BLOCK DECOMPRESSED BADLY (first bad: %d in %d: %d!=%d (compressed size=%d)) !!!!!!!!!!!!\n", c->name, i, src_len, (int)input[i], (int)debug_tmp_buff[i], dst_len);
+ break;
+ }
+ return;
+ }
+
+ // Return value test
+ //jffs2_bbc_print3("!!!!!!!! %s error: %d !!!!!!!!!!!!\n", c->name, back);
+}
+
+#endif
+
+int jffs2_zlib_compress(unsigned char *data_in, unsigned char *cpage_out, uint32_t * sourcelen, uint32_t * dstlen)
+{
+ struct jffs2_bbc_compressor_type *c;
+ int back, back_zlib, mode, min, i, i2;
+ long tmp = 0, tmp_read_time = 1000, tmp_write_time = 1000, orig_src, orig_dest, src, dest;
+ struct jffs2_bbc_model_list_node *m;
+ void *sb;
+ unsigned char *tmp_p = NULL;
+
+ sb = jffs2_bbc_model_get_act_sb();
+
+ orig_src = *sourcelen;
+ orig_dest = *dstlen;
+
+ mode = jffs2_bbc_get_compression_mode();
+
+ if (mode == JFFS2_BBC_DUMMY_MODE) {
+ i=0; i2=0;
+ if (*dstlen>2) {
+ cpage_out[i++]=JFFS2_BBC_DUMMY_BLOCKSIGN_0;
+ cpage_out[i++]=JFFS2_BBC_DUMMY_BLOCKSIGN_1;
+ i2=i;
+ }
+ for (;((i < *dstlen) && (i < (*sourcelen)+i2));i++) {
+ cpage_out[i] = data_in[i-i2];
+ }
+ *sourcelen=i-i2;
+ *dstlen=i;
+ return 0;
+ }
+
+ if (mode == JFFS2_BBC_ZLIB_MODE) {
+ /*if (!jffs2_bbc_original_compressor->enabled) {
+ jffs2_bbc_print2("jffs2.bbc: WARNING: ZLIB mode but %s disabled! Enabling for this procedure...\n",jffs2_bbc_original_compressor->name);
+ }*/
+ back = jffs2_bbc_original_compressor->compress(NULL, data_in, cpage_out, sourcelen, dstlen);
+ jffs2_bbc_original_compressor->stat_compr_orig += *sourcelen;
+ jffs2_bbc_original_compressor->stat_compr_new += *dstlen;
+ return back;
+ }
+
+ jffs2_bbc_update_compr_buf(orig_dest);
+
+ if (mode == JFFS2_BBC_SIZE_MODE) {
+ // Testing all compressors
+ if (!jffs2_bbc_original_compressor->enabled) {
+ min = -1;
+ }
+ else {
+ back_zlib = jffs2_bbc_original_compressor->compress(NULL, data_in, cpage_out, sourcelen, dstlen);
+ min = *dstlen;
+ }
+ c = jffs2_bbc_get_compressor_list();
+ while (c != NULL) {
+ c->buffer_cnt = -1;
+ if (c->enabled == 0) {
+ c = c->next;
+ continue;
+ }
+ if (c->model_file_sign == 0) {
+ src = orig_src;
+ dest = orig_dest;
+#ifdef DEBUG_COMPRESSORS
+ debug_before_compress(c, NULL, data_in, c->buffer, &src, &dest);
+#endif
+ back = c->compress(NULL, data_in, c->buffer, &src, &dest);
+#ifdef DEBUG_COMPRESSORS
+ debug_after_compress(c, back, NULL, data_in, c->buffer, &src, &dest);
+#endif
+ if (back == 0) {
+ c->buffer_cnt = dest;
+ if ((min < 0) || (min > dest))
+ min = dest;
+ }
+ }
+ else {
+ m = c->models;
+ while (m != NULL) {
+ src = orig_src;
+ dest = orig_dest;
+ if (m->sb == sb) {
+ if (c->buffer_cnt == -1) {
+#ifdef DEBUG_COMPRESSORS
+ debug_before_compress(c, m->model, data_in, c->buffer, (long *) (&src), (long *) (&dest));
+#endif
+ back = c->compress(m->model, data_in, c->buffer, (long *) (&src), (long *) (&dest));
+#ifdef DEBUG_COMPRESSORS
+ debug_after_compress(c, back, m->model, data_in, c->buffer, (long *) (&src), (long *) (&dest));
+#endif
+ if (back == 0) {
+ c->buffer_cnt = dest;
+ if ((min < 0) || (min > dest))
+ min = dest;
+ }
+ }
+ else {
+#ifdef DEBUG_COMPRESSORS
+ debug_before_compress(c, m->model, data_in, tmp_buffer, &src, &dest);
+#endif
+ back = c->compress(m->model, data_in, tmp_buffer, &src, &dest);
+#ifdef DEBUG_COMPRESSORS
+ debug_after_compress(c, back, m->model, data_in, tmp_buffer, &src, &dest);
+#endif
+ if (back == 0) {
+ if (c->buffer_cnt > dest) {
+ c->buffer_cnt = dest;
+ tmp_p = c->buffer;
+ c->buffer = tmp_buffer;
+ tmp_buffer = tmp_p;
+ if ((min < 0) || (min > dest))
+ min = dest;
+ }
+ }
+ }
+ }
+ m = m->next_compr_model;
+ }
+ }
+ c = c->next;
+ }
+ //Finding the best and copy its result
+
+#ifdef DEBUG_SHOW_BLOCK_SIZES
+ jffs2_bbc_print1("\n");
+ if (jffs2_bbc_original_compressor->enabled) {
+ if (min == *dstlen) {
+ jffs2_bbc_print3("%s:%d* ", jffs2_bbc_original_compressor->name, (int) (*dstlen));
+ }
+ else {
+ jffs2_bbc_print3("%s:%d ", jffs2_bbc_original_compressor->name, (int) (*dstlen));
+ }
+ }
+ c = jffs2_bbc_get_compressor_list();
+ while (c != NULL) {
+ if (c->enabled == 0) {
+ c = c->next;
+ continue;
+ }
+ if (c->buffer_cnt == min)
+ jffs2_bbc_print3("%s:%d* ", c->name, c->buffer_cnt);
+ else
+ jffs2_bbc_print3("%s:%d ", c->name, c->buffer_cnt);
+ c = c->next;
+ }
+#endif
+
+ if (min == -1) {
+ return -1; // none of compressors work (maybe too short output buffer)
+ }
+
+ if (jffs2_bbc_original_compressor->enabled) {
+ if (min == *dstlen) {
+ jffs2_bbc_original_compressor->stat_compr_orig += *sourcelen;
+ jffs2_bbc_original_compressor->stat_compr_new += *dstlen;
+ return back_zlib;
+ }
+ }
+
+ c = jffs2_bbc_get_compressor_list();
+ while (c != NULL) {
+ if (c->enabled == 0) {
+ c = c->next;
+ continue;
+ }
+ if (c->buffer_cnt == min) {
+ *dstlen = c->buffer_cnt;
+ *sourcelen = orig_src;
+ for (i = 0; i < *dstlen; i++) {
+ cpage_out[i] = c->buffer[i];
+ }
+ c->stat_compr_orig += *sourcelen;
+ c->stat_compr_new += *dstlen;
+ return 0;
+ }
+ c = c->next;
+ }
+ jffs2_bbc_print1("jffs2.bbc: compr (full): BUG!!!\n");
+ return 0;
+ }
+
+ if ((mode == JFFS2_BBC_FASTR_MODE)||(mode == JFFS2_BBC_FASTW_MODE)||(mode == JFFS2_BBC_FASTS_MODE)) {
+ // Estimating all compressors
+ if (jffs2_bbc_original_compressor->enabled) {
+ back = jffs2_bbc_original_compressor->estimate(NULL, data_in, *sourcelen, &tmp, &tmp_read_time, &tmp_write_time);
+ }
+ else {
+ tmp = -1;
+ tmp_read_time = -1;
+ tmp_write_time = -1;
+ }
+ if (mode == JFFS2_BBC_FASTR_MODE) tmp = tmp_read_time;
+ if (mode == JFFS2_BBC_FASTW_MODE) tmp = tmp_write_time;
+ min = tmp;
+ c = jffs2_bbc_get_compressor_list();
+ while (c != NULL) {
+ src = orig_src;
+ dest = orig_dest;
+ c->buffer_cnt = -1;
+ if (c->enabled == 0) {
+ c = c->next;
+ continue;
+ }
+ if ((c->model_file_sign == 0) || (jffs2_bbc_model_get_newest(c) != NULL)) {
+ back = c->estimate(jffs2_bbc_model_get_newest(c), data_in, src, &dest, &tmp_read_time, &tmp_write_time);
+ if (mode == JFFS2_BBC_FASTR_MODE) dest = tmp_read_time;
+ if (mode == JFFS2_BBC_FASTW_MODE) dest = tmp_write_time;
+ if (back == 0) {
+ c->buffer_cnt = dest;
+ if ((min < 0) || (min > dest))
+ min = dest;
+ }
+ else {
+ c->buffer_cnt = -1;
+ }
+ }
+ c = c->next;
+ }
+ // Finding the best and compress with it
+ if (min == -1) {
+ return -1;
+ }
+ if (jffs2_bbc_original_compressor->enabled) {
+ if (min == tmp) {
+ back = jffs2_bbc_original_compressor->compress(NULL, data_in, cpage_out, sourcelen, dstlen);
+ jffs2_bbc_original_compressor->stat_compr_orig += *sourcelen;
+ jffs2_bbc_original_compressor->stat_compr_new += *dstlen;
+ return back;
+ }
+ }
+ c = jffs2_bbc_get_compressor_list();
+ while (c != NULL) {
+ if (c->enabled == 0) {
+ c = c->next;
+ continue;
+ }
+ if (c->buffer_cnt == min) {
+ back = c->compress(jffs2_bbc_model_get_newest(c), data_in, cpage_out, (unsigned long*)sourcelen, (unsigned long*)dstlen);
+ if ((back == 0) && (*dstlen < orig_dest) && (*dstlen > 4)) {
+ c->stat_compr_orig += *sourcelen;
+ c->stat_compr_new += *dstlen;
+ }
+ else { // fallback will always be available
+ *sourcelen = orig_src;
+ *dstlen = orig_dest;
+ back = jffs2_bbc_original_compressor->compress(NULL, data_in, cpage_out, sourcelen, dstlen);
+ jffs2_bbc_original_compressor->stat_compr_orig += *sourcelen;
+ jffs2_bbc_original_compressor->stat_compr_new += *dstlen;
+ return back;
+ }
+ return 0;
+ }
+ c = c->next;
+ }
+ jffs2_bbc_print1("jffs2.bbc: compress (fastX mode): BUG!!!\n");
+ return 0;
+ }
+
+ if (mode == JFFS2_BBC_MANUAL_MODE) {
+ c = jffs2_bbc_get_manual_compressor();
+ if (c != NULL) {
+ if (c->model_file_sign == 0) {
+ src = orig_src;
+ dest = orig_dest;
+ back = c->compress(NULL, data_in, cpage_out, &src, &dest);
+ if (back == 0) {
+ *dstlen = dest;
+ *sourcelen = src;
+ c->stat_compr_orig += *sourcelen;
+ c->stat_compr_new += *dstlen;
+ return 0;
+ }
+ }
+ else {
+ c->buffer_cnt = -1;
+ m = c->models;
+ min = -1;
+ while (m != NULL) {
+ src = orig_src;
+ dest = orig_dest;
+ if (m->sb == sb) {
+ if (min == -1) {
+ back = c->compress(m->model, data_in, cpage_out, (unsigned long*)sourcelen, (unsigned long*)dstlen);
+ if ((back == 0) && (*dstlen < orig_dest) && (*dstlen > 4)) {
+ min = dest;
+ tmp_p = cpage_out;
+ }
+ }
+ else {
+ back = c->compress(m->model, data_in, tmp_buffer, &src, &dest);
+ if ((back == 0) && (dest < orig_dest) && (dest > 4)) {
+ if (c->buffer_cnt > dest) {
+ if (min > dest) {
+ min = dest;
+ tmp_p = tmp_buffer;
+ }
+ }
+ }
+ }
+ }
+ m = m->next_compr_model;
+ }
+ if (min != -1) {
+ if (tmp_p != cpage_out) {
+ for (i = 0; i < min; i++)
+ cpage_out[i] = tmp_p[i];
+ *sourcelen = orig_src;
+ *dstlen = min;
+ }
+ c->stat_compr_orig += *sourcelen;
+ c->stat_compr_new += *dstlen;
+ return 0;
+ }
+ }
+ }
+ /*else {
+ jffs2_bbc_print1("iPack: manual mode without selected compressor!\n");
+ } */
+
+ /*if (!jffs2_bbc_original_compressor->enabled) {
+ jffs2_bbc_print2("jffs2.bbc: WARNING: %s must be enabled! Enabling for this procedure...\n",jffs2_bbc_original_compressor->name);
+ }*/
+ back = jffs2_bbc_original_compressor->compress(NULL, data_in, cpage_out, sourcelen, dstlen);
+ jffs2_bbc_original_compressor->stat_compr_orig += *sourcelen;
+ jffs2_bbc_original_compressor->stat_compr_new += *dstlen;
+ return back;
+
+
+ }
+
+ jffs2_bbc_print1("jffs2.bbc: compress: unimlemented compress mode!!!\n");
+ return 0;
+}
+
+void jffs2_zlib_decompress(unsigned char *data_in, unsigned char *cpage_out, uint32_t srclen, uint32_t destlen)
+{
+ struct jffs2_bbc_model_list_node *m;
+ struct jffs2_bbc_compressor_type *c;
+ char d[2];
+ void *sb;
+ int i;
+
+ /* If the input too small... */
+ if (destlen<=2) {
+ cpage_out[0]=data_in[0];
+ if (destlen==2) cpage_out[1]=data_in[1];
+ return;
+ }
+
+ sb = jffs2_bbc_model_get_act_sb();
+ d[0] = *(data_in);
+ d[1] = *(data_in + 1);
+
+ d[0] &= 0x7f; // Variants support...
+
+ /* Search for model based decompressors... */
+ m = jffs2_bbc_get_model_list();
+ while (m != NULL) {
+ if ((d[0] == m->block_sign[0]) && (d[1] == m->block_sign[1]) && (sb == m->sb)) {
+ if (m->compressor == NULL) {
+ jffs2_bbc_print3("jffs2.bbc: decompressor for block_sign (%d,%d) not loaded!\n", (int) (d[0]), (int) (d[1]));
+ }
+ else {
+ m->compressor->decompress(m->model, data_in, cpage_out, srclen, destlen);
+ m->compressor->stat_decompr++;
+ m->stat_decompr++;
+ }
+ return;
+ }
+ m = m->next_model;
+ }
+ /* Is it ZLIB? */
+ if ((((int) d[0]) == (int)(jffs2_bbc_original_compressor->block_sign[0])) && (((int) d[1]) == (int)(jffs2_bbc_original_compressor->block_sign[1]))) {
+ jffs2_bbc_original_compressor->decompress(NULL, data_in, cpage_out, srclen, destlen);
+ jffs2_bbc_original_compressor->stat_decompr++;
+ return;
+ }
+ /* Search for non model based decompressors... */
+ c = jffs2_bbc_get_compressor_list();
+ while (c != NULL) {
+ if (c->model_file_sign == 0) {
+ if (((int) (d[0]) == (int) (c->block_sign[0])) && ((int) (d[1]) == (int) (c->block_sign[1]))) {
+ c->decompress(NULL, data_in, cpage_out, srclen, destlen);
+ c->stat_decompr++;
+ return;
+ }
+ }
+ c = c->next;
+ }
+ /* Is it DUMMY? */
+ if ((((int) d[0]) == JFFS2_BBC_DUMMY_BLOCKSIGN_0) && (((int) d[1]) == JFFS2_BBC_DUMMY_BLOCKSIGN_1)) {
+ for (i=0;i<destlen;i++) {
+ cpage_out[i]=data_in[i+2];
+ }
+ return;
+ }
+ /* No matching decompressor found... */
+ jffs2_bbc_print4("jffs2.bbc: cannot find model for decompress: bsign=(%d,%d),sb=%d. Using zlib.\n", (int) d[0], (int) d[1], (int) sb);
+ jffs2_bbc_original_compressor->decompress(NULL, data_in, cpage_out, srclen, destlen);
+ jffs2_bbc_original_compressor->stat_decompr++;
+}
+
+#endif
Index: linux-2.4.35.4/fs/jffs2/jffs2_bbc_framework.h
===================================================================
--- /dev/null
+++ linux-2.4.35.4/fs/jffs2/jffs2_bbc_framework.h
@@ -0,0 +1,202 @@
+/*
+ * JFFS2-BBC: Compression Framework - headers
+ *
+ * $Id: 301-jffs-compression,v 1.1 2005/03/26 10:33:31 wbx Exp $
+ *
+ * Copyright (C) 2004, Ferenc Havasi
+ *
+ * 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.
+ *
+ */
+
+#ifndef __JFFS2_BBC_FRAMEWORK_H__
+
+#define __JFFS2_BBC_FRAMEWORK_H__
+
+#define JFFS2_BBC_VERSION "0.54.3"
+
+#define JFFS2_BBC_CONFIG_FILE "bbc.conf"
+
+/*********************************************************************
+ * Compression mode handling *
+ *********************************************************************/
+
+#define JFFS2_BBC_ZLIB_MODE 1
+#define JFFS2_BBC_SIZE_MODE 2
+#define JFFS2_BBC_FASTR_MODE 3
+#define JFFS2_BBC_FASTW_MODE 4
+#define JFFS2_BBC_FASTS_MODE 5
+#define JFFS2_BBC_MANUAL_MODE 6
+#define JFFS2_BBC_DUMMY_MODE 7
+
+int jffs2_bbc_get_compression_mode(void);
+void jffs2_bbc_set_compression_mode(int mode);
+
+/*********************************************************************
+ * Read/write speed unit *
+ * everything is relative to the speed of zlib *
+ * bigger number means slower speed! *
+ *********************************************************************/
+
+#define JFFS2_BBC_ZLIB_READ_TIME 10000
+#define JFFS2_BBC_ZLIB_WRITE_TIME 10000
+
+/*********************************************************************
+ * Compressor handling *
+ *********************************************************************/
+
+struct jffs2_bbc_compressor_type
+{
+ char name[16];
+ int model_file_sign; /* 0 for no model file needed */
+ char block_sign[4]; /* only nomodel compressors, and only the first 2 _bytes are used! */
+ int (*init)(void);
+ int (*init_model)(void **model);
+ void (*destroy_model)(void **model);
+ void (*deinit)(void);
+ /* Compress block
+ * *dstlen bytes are allocated.
+ * if it is not enough write *sourcelen over to the processed amount of data
+ * returns non zero if fails
+ */
+ int (*compress)(void *model, unsigned char *input, unsigned char *output, unsigned long *sourcelen, unsigned long *dstlen);
+ int (*estimate)(void *model, unsigned char *input, unsigned long sourcelen,
+ unsigned long *dstlen, unsigned long *readtime, unsigned long *writetime);
+ /* Decompress block
+ * returns non zero if fails
+ */
+ int (*decompress)(void *model, unsigned char *input, unsigned char *output, unsigned long sourcelen, unsigned long dstlen);
+ char *(*proc_info)(void);
+ int (*proc_command)(char *command);
+ int enabled; /* filled by BBC */
+ int mounted; /* filled by BBC */
+ void *models; /* filled by BBC */
+ char *buffer; /* filled by BBC */
+ int buffer_size; /* filled by BBC */
+ int buffer_cnt; /* filled by BBC */
+ int buffer_tmp; /* filled by BBC */
+ int stat_compr_orig; /* filled by BBC */
+ int stat_compr_new; /* filled by BBC */
+ int stat_decompr; /* filled by BBC */
+ struct jffs2_bbc_compressor_type *next; /* filled by BBC */
+};
+
+/* It sets the compression mode to JFFS2_BBC_MANUAL_MODE */
+
+void jffs2_bbc_set_manual_compressor(struct jffs2_bbc_compressor_type *c); /* NULL = ZLIB */
+int jffs2_bbc_set_manual_compressor_by_name(char *name);
+int jffs2_bbc_disable_compressor_by_name(char *name);
+int jffs2_bbc_enable_compressor_by_name(char *name);
+void jffs2_bbc_compressor_command_by_name(char *name_and_command);
+
+/* If the compression mode is JFFS2_BCC_MANUAL_MODE the manually setted
+ compressor can be get using it. Otherwise it returns with NULL. */
+
+struct jffs2_bbc_compressor_type *jffs2_bbc_get_manual_compressor(void);
+
+struct jffs2_bbc_model_list_node
+{
+ void *sb; /* FS idendifier (JFFS2_SB_INFO(sb) at this moment) */
+ void *model; /* model data */
+ int sign; /* sign of the model (first 4 bytes) */
+ char block_sign[4]; /* block sign - only the first 2 bytes are used! */
+ int inode; /* inode number of the model file */
+ int stat_decompr;
+ struct jffs2_bbc_compressor_type *compressor;
+ struct jffs2_bbc_model_list_node *next_model;
+ struct jffs2_bbc_model_list_node *next_compr_model;
+};
+
+struct jffs2_bbc_compressor_type *jffs2_bbc_get_compressor_list(void);
+struct jffs2_bbc_model_list_node *jffs2_bbc_get_model_list(void);
+
+int jffs2_bbc_register_compressor(struct jffs2_bbc_compressor_type *c);
+int jffs2_bbc_unregister_compressor(struct jffs2_bbc_compressor_type *c);
+
+int jffs2_bbc_model_new(void *sb, int i_num, void *model);
+void jffs2_bbc_model_del(void *sb);
+void jffs2_bbc_model_set_act_sb(void *sb);
+void *jffs2_bbc_model_get_act_sb(void);
+void *jffs2_bbc_model_get_newest(struct jffs2_bbc_compressor_type *compressor);
+
+/*********************************************************************
+ * Compressor init function *
+ *********************************************************************/
+
+void jffs2_bbc_compressor_init(void);
+void jffs2_bbc_compressor_deinit(void);
+
+/*********************************************************************
+ * Statistics *
+ *********************************************************************/
+
+char *jffs2_bbc_get_compr_stats(void);
+char *jffs2_bbc_get_model_stats(void);
+
+/*********************************************************************
+ * Other *
+ *********************************************************************/
+
+
+void jffs2_bbc_print_flush(void);
+
+#ifdef __KERNEL__
+#include <linux/kernel.h>
+#define jffs2_bbc_print1(a) printk(a)
+#define jffs2_bbc_print2(a,b) printk(a,b)
+#define jffs2_bbc_print3(a,b,c) printk(a,b,c)
+#define jffs2_bbc_print4(a,b,c,d) printk(a,b,c,d)
+#define jffs2_bbc_print5(a,b,c,d,e) printk(a,b,c,d,e)
+#define jffs2_bbc_print6(a,b,c,d,e,f) printk(a,b,c,d,e,f)
+#define jffs2_bbc_print7(a,b,c,d,e,f,g) printk(a,b,c,d,e,f,g)
+#define jffs2_bbc_print8(a,b,c,d,e,f,g,h) printk(a,b,c,d,e,f,g,h)
+#define jffs2_bbc_print9(a,b,c,d,e,f,g,h,i) printk(a,b,c,d,e,f,g,h,i)
+#else
+#include <stdio.h>
+#define jffs2_bbc_print1(a) fprintf(stderr,a)
+#define jffs2_bbc_print2(a,b) fprintf(stderr,a,b)
+#define jffs2_bbc_print3(a,b,c) fprintf(stderr,a,b,c)
+#define jffs2_bbc_print4(a,b,c,d) fprintf(stderr,a,b,c,d)
+#define jffs2_bbc_print5(a,b,c,d,e) fprintf(stderr,a,b,c,d,e)
+#define jffs2_bbc_print6(a,b,c,d,e,f) fprintf(stderr,a,b,c,d,e,f)
+#define jffs2_bbc_print7(a,b,c,d,e,f,g) fprintf(stderr,a,b,c,d,e,f,g)
+#define jffs2_bbc_print8(a,b,c,d,e,f,g,h) fprintf(stderr,a,b,c,d,e,f,g,h)
+#define jffs2_bbc_print9(a,b,c,d,e,f,g,h,i) fprintf(stderr,a,b,c,d,e,f,g,h,i)
+#endif
+
+/* Handle endianness */
+#ifndef __KERNEL__
+
+#define ENDIAN_HOST_AND_TARGET_SAME 0
+#define ENDIAN_HOST_AND_TARGET_DIFFERENT 1
+
+extern int jffs2_bbc_glb_endian_X;
+
+#endif
+
+/* Allocating more than one page (tip. 4096 byte) */
+void *jffs2_bbc_malloc(long size);
+void jffs2_bbc_free(void *addr);
+
+/* Allocating less than one page (tip. 4096 byte) */
+void *jffs2_bbc_malloc_small(long size);
+void jffs2_bbc_free_small(void *addr);
+
+/* Memory guarding */
+int jffs2_bbc_test_memory_counter(int verbose);
+char *jffs2_bbc_get_mem_stats(void);
+int jffs2_bbc_get_memory_counter(void);
+
+#endif
Index: linux-2.4.35.4/fs/jffs2/jffs2_bbc_fs.c
===================================================================
--- /dev/null
+++ linux-2.4.35.4/fs/jffs2/jffs2_bbc_fs.c
@@ -0,0 +1,331 @@
+/*
+ * JFFS2-BBC: File System Extension for Linux Kernel
+ *
+ * $Id: 301-jffs-compression,v 1.1 2005/03/26 10:33:31 wbx Exp $
+ *
+ * Copyright (C) 2004, Ferenc Havasi
+ *
+ * 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.
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/fs.h>
+#include <linux/jffs2.h>
+#include <linux/proc_fs.h>
+#include <linux/version.h>
+
+#include "nodelist.h"
+
+#include "jffs2_bbc_framework.h"
+
+struct jffs2_bbc_fs_sb_list {
+ struct super_block *sb;
+ struct jffs2_bbc_fs_sb_list *next;
+};
+
+static struct jffs2_bbc_fs_sb_list *sb_list = NULL;
+
+void jffs2_bbc_proc_init(void);
+void jffs2_bbc_proc_deinit(void);
+
+void jffs2_bbc_load_model(void *sb_par) {
+ struct jffs2_sb_info *c;
+ //struct jffs2_inode_info *f;
+ struct dentry *config_dentry,*model_dentry;
+ struct qstr config_name,model_name;
+ struct file *config_file,*model_file;
+ char *buff=NULL,*model_buff;
+ int config_size,model_size;
+ int i,prev_i;
+ struct super_block *sb;
+ struct jffs2_bbc_fs_sb_list *sb_l;
+
+ sb = sb_par;
+ sb_l = jffs2_bbc_malloc_small(sizeof(struct jffs2_bbc_fs_sb_list));
+ sb_l->sb = sb;
+ sb_l->next = sb_list;
+ sb_list = sb_l;
+ config_name.name = JFFS2_BBC_CONFIG_FILE;
+ config_name.len = strlen(config_name.name);
+ config_name.hash = full_name_hash(config_name.name,config_name.len);
+ config_dentry = d_alloc(sb->s_root,&config_name);
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
+ sb->s_root->d_inode->i_op->lookup(sb->s_root->d_inode,config_dentry);
+#else
+ sb->s_root->d_inode->i_op->lookup(sb->s_root->d_inode,config_dentry,NULL);
+#endif
+
+ if (config_dentry->d_inode != NULL) {
+ config_size = config_dentry->d_inode->i_size;
+ //printk("config_file_size=%d\n",config_size);
+ if (config_size > 0) {
+ buff = jffs2_bbc_malloc(config_size+1);
+ config_file = dentry_open(config_dentry,NULL,O_RDONLY);
+ kernel_read(config_file,0,buff,config_size);
+ buff[config_size] = 0;
+ for (prev_i = i = 0 ; i < config_size+1 ; i++) {
+ if (buff[i] == '\n') buff[i]=0;
+ if (buff[i] == 0) {
+ if (prev_i != i) {
+ if ((buff[prev_i] == '-') && (buff[prev_i+1] == 0)) break;
+ printk("reading model file %s... ",buff+prev_i);
+ model_name.name = buff+prev_i;
+ model_name.len = strlen(buff+prev_i);
+ model_name.hash = full_name_hash(model_name.name,model_name.len);
+ model_dentry = d_alloc(sb->s_root,&model_name);
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
+ sb->s_root->d_inode->i_op->lookup(sb->s_root->d_inode,model_dentry);
+#else
+ sb->s_root->d_inode->i_op->lookup(sb->s_root->d_inode,model_dentry,NULL);
+#endif
+ if (model_dentry->d_inode != NULL) {
+ c = JFFS2_SB_INFO(model_dentry->d_inode->i_sb);
+ //f = JFFS2_INODE_INFO(model_dentry->d_inode);
+ model_size = model_dentry->d_inode->i_size;
+ model_buff = jffs2_bbc_malloc(model_size);
+ model_file = dentry_open(model_dentry,NULL,O_RDONLY);
+ kernel_read(model_file,0,model_buff,model_size);
+ if (jffs2_bbc_model_new(c,model_dentry->d_inode->i_ino,model_buff) != 0) {
+ printk("already loaded.\n");
+ jffs2_bbc_free(model_buff);
+ }
+ else {
+ printk("done (%d bytes readed from inode %d).\n",model_size,(int)(model_dentry->d_inode->i_ino));
+ }
+ }
+ else {
+ printk("not found.\n");
+ }
+ dput(model_dentry);
+ }
+ prev_i = i+1;
+ }
+ }
+ }
+ }
+ dput(config_dentry);
+ if (buff != NULL) jffs2_bbc_free(buff);
+}
+
+void jffs2_bbc_unload_model(void *sb_par)
+{
+ struct jffs2_sb_info *c;
+ struct super_block *sb = sb_par;
+ struct jffs2_bbc_fs_sb_list *sb_l,*sb_l2;
+ int done = 0;
+
+ c = JFFS2_SB_INFO(sb);
+ jffs2_bbc_model_del(c);
+ if (sb_list == NULL) printk("jffs2.bbc: error! NULL sb list!\n");
+ else {
+ if (sb_list->sb == sb) {
+ jffs2_bbc_free_small(sb_list);
+ sb_list = NULL;
+ done = 1;
+ }
+ else {
+ sb_l = sb_list;
+ while (sb_l->next != NULL) {
+ if (sb_l->next->sb == sb) {
+ sb_l2 = sb_l->next->next;
+ jffs2_bbc_free_small(sb_l->next);
+ sb_l->next = sb_l2;
+ done = 1;
+ }
+ sb_l = sb_l->next;
+ }
+
+ }
+ if (done == 0) {
+ printk("jffs2.bbc: cannot delete sb from sblist!\n");
+ }
+ }
+}
+
+static int jffs2_bbc_get_mounted(void) {
+ struct jffs2_bbc_fs_sb_list *sb_l;
+ int num = 0;
+
+ sb_l = sb_list;
+ while (sb_l != NULL) {
+ num++;
+ sb_l = sb_l->next;
+ }
+ return num;
+
+}
+
+int jffs2_bbc_proc_read(char *buf, char **start, off_t offset, int count, int *eof, void *data)
+{
+ int len = 0, mode;
+
+ mode = jffs2_bbc_get_compression_mode();
+ len += sprintf(buf + len, "BBC version: %s\n", JFFS2_BBC_VERSION);
+ len += sprintf(buf+len,"Mounted jffs2 filesystems: %d\n",jffs2_bbc_get_mounted());
+ //len += sprintf(buf+len,"actual model file inode: %d\n",jffs2_bbc_model_get_inum());
+ len += sprintf(buf + len, "Compression mode: ");
+ if (mode == JFFS2_BBC_ZLIB_MODE)
+ len += sprintf(buf + len, "ZLIB mode");
+ else if (mode == JFFS2_BBC_SIZE_MODE)
+ len += sprintf(buf + len, "SIZE mode");
+ else if (mode == JFFS2_BBC_FASTR_MODE)
+ len += sprintf(buf + len, "FASTR mode");
+ else if (mode == JFFS2_BBC_FASTW_MODE)
+ len += sprintf(buf + len, "FASTW mode");
+ else if (mode == JFFS2_BBC_FASTS_MODE)
+ len += sprintf(buf + len, "FASTS mode");
+ else if (mode == JFFS2_BBC_DUMMY_MODE)
+ len += sprintf(buf + len, "DUMMY mode");
+ else if (mode == JFFS2_BBC_MANUAL_MODE) {
+ len += sprintf(buf + len, "MANUAL mode (");
+ if (jffs2_bbc_get_manual_compressor() != NULL)
+ len += sprintf(buf + len, "%s)", jffs2_bbc_get_manual_compressor()->name);
+ else
+ len += sprintf(buf + len, "ZLIB)");
+ }
+ else
+ len += sprintf(buf + len, "unknown mode");
+ len += sprintf(buf + len, "\n");
+ len += sprintf(buf + len, "%s", jffs2_bbc_get_compr_stats());
+ len += sprintf(buf + len, "%s", jffs2_bbc_get_model_stats());
+ len += sprintf(buf + len, "%s", jffs2_bbc_get_mem_stats());
+ *eof = 1;
+ return len;
+}
+
+int jffs2_bbc_proc_write(struct file *file, const char *buffer_orig, unsigned long count, void *data)
+{
+ char *buffer;
+ int i;
+ struct jffs2_bbc_fs_sb_list *sb_l;
+
+ if (buffer_orig == NULL) return 0;
+
+ buffer = jffs2_bbc_malloc(count+2);
+ for (i=0;i<count;i++) buffer[i]=buffer_orig[i];
+ buffer[count] = 0;
+ if ((*buffer == 'z') || (*buffer == 'Z')) {
+ jffs2_bbc_set_compression_mode(JFFS2_BBC_ZLIB_MODE);
+ jffs2_bbc_print1("jffs2.bbc: ZLIB compression mode activated.\n");
+ jffs2_bbc_free(buffer);
+ return count;
+ }
+ else if ((*buffer == 's') || (*buffer == 'S')) {
+ jffs2_bbc_set_compression_mode(JFFS2_BBC_SIZE_MODE);
+ jffs2_bbc_print1("jffs2.bbc: SIZE compression mode activated.\n");
+ jffs2_bbc_free(buffer);
+ return count;
+ }
+ else if ((*buffer == 'd') || (*buffer == 'D')) {
+ jffs2_bbc_set_compression_mode(JFFS2_BBC_DUMMY_MODE);
+ jffs2_bbc_print1("jffs2.bbc: DUMMY compression mode activated.\n");
+ jffs2_bbc_free(buffer);
+ return count;
+ }
+ else if (((*buffer == 'm') || (*buffer == 'M')) && (count >= 3) && (buffer[1] == ':')) {
+ jffs2_bbc_print1("jffs2.bbc: activating MANUAL mode.\n");
+ jffs2_bbc_set_manual_compressor_by_name(buffer + 2);
+ jffs2_bbc_free(buffer);
+ return count;
+ }
+ else if (((*buffer == '0')) && (count >= 3) && (buffer[1] == ':')) {
+ jffs2_bbc_print1("jffs2.bbc: disabling a compressor... ");
+ if (jffs2_bbc_disable_compressor_by_name(buffer + 2) == 0) {
+ jffs2_bbc_print1("done.\n");
+ }
+ else {
+ jffs2_bbc_print1("not found.\n");
+ }
+ jffs2_bbc_free(buffer);
+ return count;
+ }
+ else if (((*buffer == '1')) && (count >= 3) && (buffer[1] == ':')) {
+ jffs2_bbc_print1("jffs2.bbc: enabling a compressor... ");
+ if (jffs2_bbc_enable_compressor_by_name(buffer + 2) == 0) {
+ jffs2_bbc_print1("done.\n");
+ }
+ else {
+ jffs2_bbc_print1("not found.\n");
+ }
+ jffs2_bbc_free(buffer);
+ return count;
+ }
+ else if (((*buffer == 'c') || (*buffer == 'C')) && (count >= 3) && (buffer[1] == ':')) {
+ jffs2_bbc_compressor_command_by_name(buffer + 2);
+ jffs2_bbc_free(buffer);
+ return count;
+ }
+ else if ((*buffer == 'r') || (*buffer == 'R')) {
+ jffs2_bbc_print1("jffs2.bbc: reloading model files:\n");
+ sb_l = sb_list;
+ while (sb_l != NULL) {
+ jffs2_bbc_unload_model(sb_l->sb);
+ jffs2_bbc_load_model(sb_l->sb);
+ sb_l = sb_l->next;
+ }
+ jffs2_bbc_free(buffer);
+ return count;
+ }
+ else if (((buffer[0] == 'f') || (buffer[0] == 'F'))&&((buffer[1] == 'r') || (buffer[1] == 'R'))) {
+ jffs2_bbc_set_compression_mode(JFFS2_BBC_FASTR_MODE);
+ jffs2_bbc_print1("jffs2.bbc: FASTR compression mode activated.\n");
+ jffs2_bbc_free(buffer);
+ return count;
+ }
+ else if (((buffer[0] == 'f') || (buffer[0] == 'F'))&&((buffer[1] == 'w') || (buffer[1] == 'W'))) {
+ jffs2_bbc_set_compression_mode(JFFS2_BBC_FASTW_MODE);
+ jffs2_bbc_print1("jffs2.bbc: FASTW compression mode activated.\n");
+ jffs2_bbc_free(buffer);
+ return count;
+ }
+ else if (((buffer[0] == 'f') || (buffer[0] == 'F'))&&((buffer[1] == 's') || (buffer[1] == 'S'))) {
+ jffs2_bbc_set_compression_mode(JFFS2_BBC_FASTS_MODE);
+ jffs2_bbc_print1("jffs2.bbc: FASTS compression mode activated.\n");
+ jffs2_bbc_free(buffer);
+ return count;
+ }
+
+ jffs2_bbc_print1("jffs2.bbc: unkown command. Valid commands are:\n"
+ " z = switch to ZLIB compression mode\n"
+ " s = switch to SIZE compression mode\n"
+ " d = switch to DUMMY compression mode\n"
+ " fr = switch to FASTR compression mode\n"
+ " fw = switch to FASTW compression mode\n"
+ " fs = switch to FASTS compression mode\n"
+ " r = reread model files from actual file system\n"
+ " m:compressor_name = switch to MANUAL compression mode\n"
+ " 0:compressor_name = disable a compressor\n"
+ " 1:compressor_name = enable a compressor\n"
+ " c:compressor_name:command = enable a compressor\n");
+ jffs2_bbc_free(buffer);
+ return count;
+}
+
+void jffs2_bbc_proc_init()
+{
+ struct proc_dir_entry *res = create_proc_entry("jffs2_bbc", 0, NULL);
+ jffs2_bbc_compressor_init();
+ if (res) {
+ res->read_proc = jffs2_bbc_proc_read;
+ res->write_proc = jffs2_bbc_proc_write;
+ }
+}
+
+void jffs2_bbc_proc_deinit()
+{
+ jffs2_bbc_compressor_deinit();
+ remove_proc_entry("jffs2_bbc", NULL);
+}
Index: linux-2.4.35.4/fs/jffs2/jffs2_bbc_fs.h
===================================================================
--- /dev/null
+++ linux-2.4.35.4/fs/jffs2/jffs2_bbc_fs.h
@@ -0,0 +1,30 @@
+/*
+ * JFFS2 BBC: File System Extension for Linux Kernel - headers
+ *
+ * $Id: 301-jffs-compression,v 1.1 2005/03/26 10:33:31 wbx Exp $
+ *
+ * Copyright (C) 2004, Ferenc Havasi
+ *
+ * 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.
+ *
+ */
+
+extern int jffs2_bbc_inode_not_found;
+
+void jffs2_bbc_load_model(void *sb);
+void jffs2_bbc_unload_model(void *sb);
+
+void jffs2_bbc_proc_init(void);
+void jffs2_bbc_proc_deinit(void);
Index: linux-2.4.35.4/fs/jffs2/jffs2_bbc_lzari_comp.c
===================================================================
--- /dev/null
+++ linux-2.4.35.4/fs/jffs2/jffs2_bbc_lzari_comp.c
@@ -0,0 +1,788 @@
+/* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 4; tab-width: 4 -*- */
+
+/*
+ jffs2_bbc_lzari_comp.c -- Lempel-Ziv-Arithmetic coding compression module for jffs2
+ Copyright (C) 2004 Patrik Kluba
+ Based on the LZARI source included in LDS (lossless datacompression sources)
+ Block-compression and bitstream modifications by Patrik Kluba
+ $Header: /openwrt/openwrt/package/linux/kernel-patches/301-jffs-compression,v 1.1 2005/03/26 10:33:31 wbx Exp $
+*/
+
+/*
+Original copyright follows:
+
+**************************************************************
+ LZARI.C -- A Data Compression Program
+ (tab = 4 spaces)
+**************************************************************
+ 4/7/1989 Haruhiko Okumura
+ Use, distribute, and modify this program freely.
+ Please send me your improved versions.
+ PC-VAN SCIENCE
+ NIFTY-Serve PAF01022
+ CompuServe 74050,1022
+**************************************************************
+
+LZARI.C (c)1989 by Haruyasu Yoshizaki, Haruhiko Okumura, and Kenji Rikitake.
+All rights reserved. Permission granted for non-commercial use.
+
+*/
+
+/*
+
+ 2004-02-18 pajko <pajko(AT)halom(DOT)u-szeged(DOT)hu>
+ Removed unused variables and fixed no return value
+
+ 2004-02-16 pajko <pajko(AT)halom(DOT)u-szeged(DOT)hu>
+ Initial release
+
+*/
+
+/* lzari.c */
+
+#define N 4096 /* size of ring buffer */
+#define F 60 /* upper limit for match_length */
+#define THRESHOLD 2 /* encode string into position and length
+ if match_length is greater than this */
+#define NIL N /* index for root of binary search trees */
+
+static unsigned char
+ text_buf[N + F - 1]; /* ring buffer of size N,
+ with extra F-1 bytes to facilitate string comparison */
+static unsigned long match_position, match_length, /* of longest match. These are
+ set by the InsertNode() procedure. */
+ lson[N + 1], rson[N + 257], dad[N + 1]; /* left & right children &
+ parents -- These constitute binary search trees. */
+
+static void InitTree(void) /* Initialize trees */
+{
+ unsigned long i;
+
+ /* For i = 0 to N - 1, rson[i] and lson[i] will be the right and
+ left children of node i. These nodes need not be initialized.
+ Also, dad[i] is the parent of node i. These are initialized to
+ NIL (= N), which stands for 'not used.'
+ For i = 0 to 255, rson[N + i + 1] is the root of the tree
+ for strings that begin with character i. These are initialized
+ to NIL. Note there are 256 trees. */
+
+ for (i = N + 1; i <= N + 256; i++) rson[i] = NIL; /* root */
+ for (i = 0; i < N; i++) dad[i] = NIL; /* node */
+}
+
+static void InsertNode(unsigned long r)
+ /* Inserts string of length F, text_buf[r..r+F-1], into one of the
+ trees (text_buf[r]'th tree) and returns the longest-match position
+ and length via the global variables match_position and match_length.
+ If match_length = F, then removes the old node in favor of the new
+ one, because the old one will be deleted sooner.
+ Note r plays double role, as tree node and position in buffer. */
+{
+ unsigned long i, p, temp;
+ unsigned char *key;
+ signed long cmp;
+
+ cmp = 1; key = &text_buf[r]; p = N + 1 + key[0];
+ rson[r] = lson[r] = NIL; match_length = 0;
+ for ( ; ; ) {
+ if (cmp >= 0) {
+ if (rson[p] != NIL) p = rson[p];
+ else { rson[p] = r; dad[r] = p; return; }
+ } else {
+ if (lson[p] != NIL) p = lson[p];
+ else { lson[p] = r; dad[r] = p; return; }
+ }
+ for (i = 1; i < F; i++)
+ if ((cmp = key[i] - text_buf[p + i]) != 0) break;
+ if (i > THRESHOLD) {
+ if (i > match_length) {
+ match_position = (r - p) & (N - 1);
+ if ((match_length = i) >= F) break;
+ } else if (i == match_length) {
+ if ((temp = (r - p) & (N - 1)) < match_position)
+ match_position = temp;
+ }
+ }
+ }
+ dad[r] = dad[p]; lson[r] = lson[p]; rson[r] = rson[p];
+ dad[lson[p]] = r; dad[rson[p]] = r;
+ if (rson[dad[p]] == p) rson[dad[p]] = r;
+ else lson[dad[p]] = r;
+ dad[p] = NIL; /* remove p */
+}
+
+static void DeleteNode(unsigned long p) /* Delete node p from tree */
+{
+ unsigned long q;
+
+ if (dad[p] == NIL) return; /* not in tree */
+ if (rson[p] == NIL) q = lson[p];
+ else if (lson[p] == NIL) q = rson[p];
+ else {
+ q = lson[p];
+ if (rson[q] != NIL) {
+ do { q = rson[q]; } while (rson[q] != NIL);
+ rson[dad[q]] = lson[q]; dad[lson[q]] = dad[q];
+ lson[q] = lson[p]; dad[lson[p]] = q;
+ }
+ rson[q] = rson[p]; dad[rson[p]] = q;
+ }
+ dad[q] = dad[p];
+ if (rson[dad[p]] == p) rson[dad[p]] = q;
+ else lson[dad[p]] = q;
+ dad[p] = NIL;
+}
+
+/********** Arithmetic Compression **********/
+
+/* If you are not familiar with arithmetic compression, you should read
+ I. E. Witten, R. M. Neal, and J. G. Cleary,
+ Communications of the ACM, Vol. 30, pp. 520-540 (1987),
+ from which much have been borrowed. */
+
+#define M 15
+
+/* Q1 (= 2 to the M) must be sufficiently large, but not so
+ large as the unsigned long 4 * Q1 * (Q1 - 1) overflows. */
+
+#define Q1 (1UL << M)
+#define Q2 (2 * Q1)
+#define Q3 (3 * Q1)
+#define Q4 (4 * Q1)
+#define MAX_CUM (Q1 - 1)
+
+#define N_CHAR (256 - THRESHOLD + F)
+ /* character code = 0, 1, ..., N_CHAR - 1 */
+
+static unsigned long char_to_sym[N_CHAR], sym_to_char[N_CHAR + 1];
+static unsigned long
+ sym_freq[N_CHAR + 1], /* frequency for symbols */
+ sym_cum[N_CHAR + 1], /* cumulative freq for symbols */
+ position_cum[N + 1]; /* cumulative freq for positions */
+
+static void StartModel(void) /* Initialize model */
+{
+ unsigned long ch, sym, i;
+
+ sym_cum[N_CHAR] = 0;
+ for (sym = N_CHAR; sym >= 1; sym--) {
+ ch = sym - 1;
+ char_to_sym[ch] = sym; sym_to_char[sym] = ch;
+ sym_freq[sym] = 1;
+ sym_cum[sym - 1] = sym_cum[sym] + sym_freq[sym];
+ }
+ sym_freq[0] = 0; /* sentinel (!= sym_freq[1]) */
+ position_cum[N] = 0;
+ for (i = N; i >= 1; i--)
+ position_cum[i - 1] = position_cum[i] + 10000 / (i + 200);
+ /* empirical distribution function (quite tentative) */
+ /* Please devise a better mechanism! */
+}
+
+static void UpdateModel(unsigned long sym)
+{
+ unsigned long c, ch_i, ch_sym;
+ unsigned long i;
+ if (sym_cum[0] >= MAX_CUM) {
+ c = 0;
+ for (i = N_CHAR; i > 0; i--) {
+ sym_cum[i] = c;
+ c += (sym_freq[i] = (sym_freq[i] + 1) >> 1);
+ }
+ sym_cum[0] = c;
+ }
+ for (i = sym; sym_freq[i] == sym_freq[i - 1]; i--) ;
+ if (i < sym) {
+ ch_i = sym_to_char[i]; ch_sym = sym_to_char[sym];
+ sym_to_char[i] = ch_sym; sym_to_char[sym] = ch_i;
+ char_to_sym[ch_i] = sym; char_to_sym[ch_sym] = i;
+ }
+ sym_freq[i]++;
+ while (--i > 0) sym_cum[i]++;
+ sym_cum[0]++;
+}
+
+static unsigned long BinarySearchSym(unsigned long x)
+ /* 1 if x >= sym_cum[1],
+ N_CHAR if sym_cum[N_CHAR] > x,
+ i such that sym_cum[i - 1] > x >= sym_cum[i] otherwise */
+{
+ unsigned long i, j, k;
+
+ i = 1; j = N_CHAR;
+ while (i < j) {
+ k = (i + j) / 2;
+ if (sym_cum[k] > x) i = k + 1; else j = k;
+ }
+ return i;
+}
+
+unsigned long BinarySearchPos(unsigned long x)
+ /* 0 if x >= position_cum[1],
+ N - 1 if position_cum[N] > x,
+ i such that position_cum[i] > x >= position_cum[i + 1] otherwise */
+{
+ unsigned long i, j, k;
+
+ i = 1; j = N;
+ while (i < j) {
+ k = (i + j) / 2;
+ if (position_cum[k] > x) i = k + 1; else j = k;
+ }
+ return i - 1;
+}
+
+/* modified for block compression */
+/* on return, srclen will contain the number of successfully compressed bytes
+ and dstlen will contain completed compressed bytes */
+
+static int Encode(unsigned char *srcbuf, unsigned char *dstbuf, unsigned long *srclen,
+ unsigned long *dstlen)
+{
+ unsigned long c, i, len, r, s, last_match_length, sym, range;
+ unsigned long low = 0;
+ unsigned long high = Q4;
+ unsigned long shifts = 0; /* counts for magnifying low and high around Q2 */
+ unsigned char *ip, *op;
+ unsigned long written = 0;
+ unsigned long read = 0;
+ unsigned char buffer = 0;
+ unsigned char mask = 128;
+ unsigned char *srcend = srcbuf + *srclen;
+ unsigned char *dstend = dstbuf + *dstlen;
+ ip = srcbuf;
+ op = dstbuf;
+ StartModel();
+ InitTree(); /* initialize trees */
+ s = 0; r = N - F;
+ for (i = s; i < r; i++) text_buf[i] = ' '; /* Clear the buffer with
+ any character that will appear often. */
+ for (len = 0; (len < F) && (ip < srcend); len++)
+ text_buf[r + len] = *(ip++); /* Read F bytes into the last F bytes of
+ the buffer */
+ read = len;
+ for (i = 1; i <= F; i++) InsertNode(r - i); /* Insert the F strings,
+ each of which begins with one or more 'space' characters. Note
+ the order in which these strings are inserted. This way,
+ degenerate trees will be less likely to occur. */
+ InsertNode(r); /* Finally, insert the whole string just read. The
+ global variables match_length and match_position are set. */
+ do {
+ if (match_length > len) match_length = len; /* match_length
+ may be spuriously long near the end of text. */
+ if (match_length <= THRESHOLD) {
+ match_length = 1; /* Not long enough match. Send one byte. */
+ sym = char_to_sym[text_buf[r]];
+ range = high - low;
+ high = low + (range * sym_cum[sym - 1]) / sym_cum[0];
+ low += (range * sym_cum[sym ]) / sym_cum[0];
+ for ( ; ; ) {
+ if (high <= Q2) {
+ if ((mask >>= 1) == 0) {
+ if (op >= dstend) {
+ *dstlen = written;
+ return -1;
+ }
+ *(op++) = buffer;
+ buffer = 0;
+ mask = 128;
+ written++;
+ *srclen = read;
+ }
+ for ( ; shifts > 0; shifts--) {
+ buffer |= mask;
+ if ((mask >>= 1) == 0) {
+ if (op >= dstend) {
+ *dstlen = written;
+ return -1;
+ }
+ *(op++) = buffer;
+ buffer = 0;
+ mask = 128;
+ written++;
+ *srclen = read;
+ }
+ }
+ } else if (low >= Q2) {
+ buffer |= mask;
+ if ((mask >>= 1) == 0) {
+ if (op >= dstend) {
+ *dstlen = written;
+ return -1;
+ }
+ *(op++) = buffer;
+ buffer = 0;
+ mask = 128;
+ written++;
+ *srclen = read;
+ }
+ for ( ; shifts > 0; shifts--) {
+ if ((mask >>= 1) == 0) {
+ if (op >= dstend) {
+ *dstlen = written;
+ return -1;
+ }
+ *(op++) = buffer;
+ buffer = 0;
+ mask = 128;
+ written++;
+ *srclen = read;
+ }
+ }
+ low -= Q2;
+ high -= Q2;
+ } else if (low >= Q1 && high <= Q3) {
+ shifts++;
+ low -= Q1;
+ high -= Q1;
+ } else break;
+ low += low; high += high;
+ }
+ UpdateModel(sym);
+ } else {
+ sym = char_to_sym[255 - THRESHOLD + match_length];
+ range = high - low;
+ high = low + (range * sym_cum[sym - 1]) / sym_cum[0];
+ low += (range * sym_cum[sym ]) / sym_cum[0];
+ for ( ; ; ) {
+ if (high <= Q2) {
+ if ((mask >>= 1) == 0) {
+ if (op >= dstend) {
+ *dstlen = written;
+ return -1;
+ }
+ *(op++) = buffer;
+ buffer = 0;
+ mask = 128;
+ written++;
+ *srclen = read;
+ }
+ for ( ; shifts > 0; shifts--) {
+ buffer |= mask;
+ if ((mask >>= 1) == 0) {
+ if (op >= dstend) {
+ *dstlen = written;
+ return -1;
+ }
+ *(op++) = buffer;
+ buffer = 0;
+ mask = 128;
+ written++;
+ *srclen = read;
+ }
+ }
+ } else if (low >= Q2) {
+ buffer |= mask;
+ if ((mask >>= 1) == 0) {
+ if (op >= dstend) {
+ *dstlen = written;
+ return -1;
+ }
+ *(op++) = buffer;
+ buffer = 0;
+ mask = 128;
+ written++;
+ *srclen = read;
+ }
+ for ( ; shifts > 0; shifts--) {
+ if ((mask >>= 1) == 0) {
+ if (op >= dstend) {
+ *dstlen = written;
+ return -1;
+ }
+ *(op++) = buffer;
+ buffer = 0;
+ mask = 128;
+ written++;
+ *srclen = read;
+ }
+ }
+ low -= Q2;
+ high -= Q2;
+ } else if (low >= Q1 && high <= Q3) {
+ shifts++;
+ low -= Q1;
+ high -= Q1;
+ } else break;
+ low += low; high += high;
+ }
+ UpdateModel(sym);
+ range = high - low;
+ high = low + (range * position_cum[match_position - 1]) / position_cum[0];
+ low += (range * position_cum[match_position ]) / position_cum[0];
+ for ( ; ; ) {
+ if (high <= Q2) {
+ if ((mask >>= 1) == 0) {
+ if (op >= dstend) {
+ *dstlen = written;
+ return -1;
+ }
+ *(op++) = buffer;
+ buffer = 0;
+ mask = 128;
+ written++;
+ *srclen = read;
+ }
+ for ( ; shifts > 0; shifts--) {
+ buffer |= mask;
+ if ((mask >>= 1) == 0) {
+ if (op >= dstend) {
+ *dstlen = written;
+ return -1;
+ }
+ *(op++) = buffer;
+ buffer = 0;
+ mask = 128;
+ written++;
+ *srclen = read;
+ }
+ }
+ } else {
+ if (low >= Q2) {
+ buffer |= mask;
+ if ((mask >>= 1) == 0) {
+ if (op >= dstend) {
+ *dstlen = written;
+ return -1;
+ }
+ *(op++) = buffer;
+ buffer = 0;
+ mask = 128;
+ written++;
+ *srclen = read;
+ }
+ for ( ; shifts > 0; shifts--) {
+ if ((mask >>= 1) == 0) {
+ if (op >= dstend) {
+ *dstlen = written;
+ return -1;
+ }
+ *(op++) = buffer;
+ buffer = 0;
+ mask = 128;
+ written++;
+ *srclen = read;
+ }
+ }
+ low -= Q2;
+ high -= Q2;
+ } else {
+ if ((low >= Q1) && (high <= Q3)) {
+ shifts++;
+ low -= Q1;
+ high -= Q1;
+ } else {
+ break;
+ }
+ }
+ }
+ low += low;
+ high += high;
+ }
+ }
+ last_match_length = match_length;
+ for (i = 0; (i < last_match_length) && (ip < srcend); i++) {
+ c = *(ip++);
+ DeleteNode(s);
+ text_buf[s] = c;
+ if (s < F - 1)
+ text_buf[s + N] = c;
+ s = (s + 1) & (N - 1);
+ r = (r + 1) & (N - 1);
+ InsertNode(r);
+ }
+ read += i;
+ while (i++ < last_match_length) {
+ DeleteNode(s);
+ s = (s + 1) & (N - 1);
+ r = (r + 1) & (N - 1);
+ if (--len) InsertNode(r);
+ }
+ } while (len > 0);
+ shifts++;
+ if (low < Q1) {
+ if ((mask >>= 1) == 0) {
+ if (op >= dstend) {
+ *dstlen = written;
+ return -1;
+ }
+ *(op++) = buffer;
+ buffer = 0;
+ mask = 128;
+ written++;
+ *srclen = read;
+ }
+ for ( ; shifts > 0; shifts--) {
+ buffer |= mask;
+ if ((mask >>= 1) == 0) {
+ if (op >= dstend) {
+ *dstlen = written;
+ return -1;
+ }
+ *(op++) = buffer;
+ buffer = 0;
+ mask = 128;
+ written++;
+ *srclen = read;
+ }
+ }
+ } else {
+ buffer |= mask;
+ if ((mask >>= 1) == 0) {
+ if (op >= dstend) {
+ *dstlen = written;
+ return -1;
+ }
+ *(op++) = buffer;
+ buffer = 0;
+ mask = 128;
+ written++;
+ *srclen = read;
+ }
+ for ( ; shifts > 0; shifts--) {
+ if ((mask >>= 1) == 0) {
+ if (op >= dstend) {
+ *dstlen = written;
+ return -1;
+ }
+ *(op++) = buffer;
+ buffer = 0;
+ mask = 128;
+ written++;
+ *srclen = read;
+ }
+ }
+ }
+ for (i = 0; i < 7; i++) {
+ if ((mask >>= 1) == 0) {
+ if (op >= dstend) {
+ *dstlen = written;
+ return -1;
+ }
+ *(op++) = buffer;
+ buffer = 0;
+ mask = 128;
+ written++;
+ *srclen = read;
+ }
+ }
+ *dstlen = written;
+ return 0;
+}
+
+static int Decode(unsigned char *srcbuf, unsigned char *dstbuf, unsigned long srclen,
+ unsigned long dstlen) /* Just the reverse of Encode(). */
+{
+ unsigned long i, r, j, k, c, range, sym;
+ unsigned char *ip, *op;
+ unsigned char *srcend = srcbuf + srclen;
+ unsigned char *dstend = dstbuf + dstlen;
+ unsigned char buffer = 0;
+ unsigned char mask = 0;
+ unsigned long low = 0;
+ unsigned long high = Q4;
+ unsigned long value = 0;
+ ip = srcbuf;
+ op = dstbuf;
+ for (i = 0; i < M + 2; i++) {
+ value *= 2;
+ if ((mask >>= 1) == 0) {
+ buffer = (ip >= srcend) ? 0 : *(ip++);
+ mask = 128;
+ }
+ value += ((buffer & mask) != 0);
+ }
+ StartModel();
+ for (i = 0; i < N - F; i++) text_buf[i] = ' ';
+ r = N - F;
+ while (op < dstend) {
+ range = high - low;
+ sym = BinarySearchSym((unsigned long)
+ (((value - low + 1) * sym_cum[0] - 1) / range));
+ high = low + (range * sym_cum[sym - 1]) / sym_cum[0];
+ low += (range * sym_cum[sym ]) / sym_cum[0];
+ for ( ; ; ) {
+ if (low >= Q2) {
+ value -= Q2; low -= Q2; high -= Q2;
+ } else if (low >= Q1 && high <= Q3) {
+ value -= Q1; low -= Q1; high -= Q1;
+ } else if (high > Q2) break;
+ low += low; high += high;
+ value *= 2;
+ if ((mask >>= 1) == 0) {
+ buffer = (ip >= srcend) ? 0 : *(ip++);
+ mask = 128;
+ }
+ value += ((buffer & mask) != 0);
+ }
+ c = sym_to_char[sym];
+ UpdateModel(sym);
+ if (c < 256) {
+ if (op >= dstend) return -1;
+ *(op++) = c;
+ text_buf[r++] = c;
+ r &= (N - 1);
+ } else {
+ j = c - 255 + THRESHOLD;
+ range = high - low;
+ i = BinarySearchPos((unsigned long)
+ (((value - low + 1) * position_cum[0] - 1) / range));
+ high = low + (range * position_cum[i ]) / position_cum[0];
+ low += (range * position_cum[i + 1]) / position_cum[0];
+ for ( ; ; ) {
+ if (low >= Q2) {
+ value -= Q2; low -= Q2; high -= Q2;
+ } else if (low >= Q1 && high <= Q3) {
+ value -= Q1; low -= Q1; high -= Q1;
+ } else if (high > Q2) break;
+ low += low; high += high;
+ value *= 2;
+ if ((mask >>= 1) == 0) {
+ buffer = (ip >= srcend) ? 0 : *(ip++);
+ mask = 128;
+ }
+ value += ((buffer & mask) != 0);
+ }
+ i = (r - i - 1) & (N - 1);
+ for (k = 0; k < j; k++) {
+ c = text_buf[(i + k) & (N - 1)];
+ if (op >= dstend) return -1;
+ *(op++) = c;
+ text_buf[r++] = c;
+ r &= (N - 1);
+ }
+ }
+ }
+ return 0;
+}
+
+/* interface to jffs2 bbc follows */
+
+#include "jffs2_bbc_framework.h"
+
+#define JFFS2_BBC_LZARI_BLOCK_SIGN {0x73, 0x9a, 0x1c, 0x4d}
+
+static int
+jffs2_bbc_lzari_compressor_init (void);
+
+static void
+jffs2_bbc_lzari_compressor_deinit (void);
+
+static int
+jffs2_bbc_lzari_compress (void *model, unsigned char *input,
+ unsigned char *output, unsigned long *sourcelen,
+ unsigned long *dstlen);
+
+static int
+jffs2_bbc_lzari_estimate (void *model, unsigned char *input,
+ unsigned long sourcelen, unsigned long *dstlen,
+ unsigned long *readtime, unsigned long *writetime);
+
+static int
+jffs2_bbc_lzari_decompress (void *model, unsigned char *input,
+ unsigned char *output, unsigned long sourcelen,
+ unsigned long dstlen);
+
+static char *
+jffs2_bbc_lzari_proc_info (void);
+
+static int
+jffs2_bbc_lzari_proc_command (char *command);
+
+struct jffs2_bbc_compressor_type jffs2_bbc_lzari = {
+ "lzari",
+ 0,
+ JFFS2_BBC_LZARI_BLOCK_SIGN,
+ jffs2_bbc_lzari_compressor_init,
+ NULL,
+ NULL,
+ jffs2_bbc_lzari_compressor_deinit,
+ jffs2_bbc_lzari_compress,
+ jffs2_bbc_lzari_estimate,
+ jffs2_bbc_lzari_decompress,
+ jffs2_bbc_lzari_proc_info,
+ jffs2_bbc_lzari_proc_command
+};
+
+static int
+jffs2_bbc_lzari_compressor_init (void)
+{
+ return 0;
+}
+
+static void
+jffs2_bbc_lzari_compressor_deinit (void)
+{
+}
+
+static int
+jffs2_bbc_lzari_compress (void *model, unsigned char *input,
+ unsigned char *output, unsigned long *sourcelen,
+ unsigned long *dstlen)
+{
+ int retval;
+ unsigned long dst = *dstlen;
+ *(output++) = jffs2_bbc_lzari.block_sign[0];
+ *(output++) = jffs2_bbc_lzari.block_sign[1];
+ dst -= 2;
+ retval = Encode(input, output, sourcelen, &dst);
+ dst += 2;
+ *dstlen = dst;
+ return retval;
+}
+
+static int
+jffs2_bbc_lzari_estimate (void *model, unsigned char *input,
+ unsigned long sourcelen, unsigned long *dstlen,
+ unsigned long *readtime, unsigned long *writetime)
+{
+ *dstlen = sourcelen / 2;
+ *readtime = JFFS2_BBC_ZLIB_READ_TIME * 15;
+ *writetime = JFFS2_BBC_ZLIB_WRITE_TIME * 7;
+ return 0;
+}
+
+static int
+jffs2_bbc_lzari_decompress (void *model, unsigned char *input,
+ unsigned char *output, unsigned long sourcelen,
+ unsigned long dstlen)
+{
+ if ( ( *(input++) != (unsigned char)jffs2_bbc_lzari.block_sign[0] ) ||
+ ( *(input++) != (unsigned char)jffs2_bbc_lzari.block_sign[1] )
+ ) {
+ return -1;
+ } else {
+ return Decode(input, output, sourcelen - 2, dstlen);
+ }
+}
+
+static char *
+jffs2_bbc_lzari_proc_info (void)
+{
+ return "Lempel-Ziv-Arithmetic coding compression module";
+}
+
+static int
+jffs2_bbc_lzari_proc_command (char *command)
+{
+ return 0;
+}
+
+struct jffs2_bbc_compressor_type *
+jffs2_bbc_lzari_init (int mode)
+{
+ if (jffs2_bbc_register_compressor (&jffs2_bbc_lzari) == 0)
+ {
+ return &jffs2_bbc_lzari;
+ }
+ else
+ {
+ return NULL;
+ }
+}
+
+void
+jffs2_bbc_lzari_deinit (void)
+{
+ jffs2_bbc_unregister_compressor (&jffs2_bbc_lzari);
+}
Index: linux-2.4.35.4/fs/jffs2/jffs2_bbc_lzhd_comp.c
===================================================================
--- /dev/null
+++ linux-2.4.35.4/fs/jffs2/jffs2_bbc_lzhd_comp.c
@@ -0,0 +1,747 @@
+/* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 4; tab-width: 4 -*- */
+
+/*
+ jffs2_bbc_lzhd_comp.c -- Lempel-Ziv-(dynamic) Huffman compression module for jffs2
+ Copyright (C) 2004 Patrik Kluba
+ Based on the LZHUF source included in LDS (lossless datacompression sources)
+ Block-compression and bitstream modifications by Patrik Kluba
+ $Header: /openwrt/openwrt/package/linux/kernel-patches/301-jffs-compression,v 1.1 2005/03/26 10:33:31 wbx Exp $
+*/
+
+/*
+Original copyright follows:
+
+**************************************************************
+ lzhuf.c
+ written by Haruyasu Yoshizaki 11/20/1988
+ some minor changes 4/6/1989
+ comments translated by Haruhiko Okumura 4/7/1989
+**************************************************************
+
+LZHUF.C (c)1989 by Haruyasu Yoshizaki, Haruhiko Okumura, and Kenji Rikitake.
+All rights reserved. Permission granted for non-commercial use.
+
+*/
+
+/*
+
+ 2004-02-18 pajko <pajko(AT)halom(DOT)u-szeged(DOT)hu>
+ Replaced name lzh-d with lzhd
+ Fixed no return value
+
+ 2004-02-16 pajko <pajko(AT)halom(DOT)u-szeged(DOT)hu>
+ Initial release
+
+*/
+
+/* required because of memmove */
+#ifndef __KERNEL__
+ #include <string.h>
+#else
+ #include <linux/string.h>
+#endif
+
+/* lzhuf.c */
+
+#define N 4096 /* size of ring buffer */
+#define F 60 /* upper limit for match_length */
+#define THRESHOLD 2 /* encode string into position and length
+ if match_length is greater than this */
+#define NIL N /* index for root of binary search trees */
+
+static unsigned char
+ text_buf[N + F - 1]; /* ring buffer of size N,
+ with extra F-1 bytes to facilitate string comparison */
+static unsigned long match_position, match_length, /* of longest match. These are
+ set by the InsertNode() procedure. */
+ lson[N + 1], rson[N + 257], dad[N + 1]; /* left & right children &
+ parents -- These constitute binary search trees. */
+
+static void InitTree(void) /* initialize trees */
+{
+ unsigned long i;
+
+ /* For i = 0 to N - 1, rson[i] and lson[i] will be the right and
+ left children of node i. These nodes need not be initialized.
+ Also, dad[i] is the parent of node i. These are initialized to
+ NIL (= N), which stands for 'not used.'
+ For i = 0 to 255, rson[N + i + 1] is the root of the tree
+ for strings that begin with character i. These are initialized
+ to NIL. Note there are 256 trees. */
+
+ for (i = N + 1; i <= N + 256; i++) rson[i] = NIL;
+ for (i = 0; i < N; i++) dad[i] = NIL;
+}
+
+static void InsertNode(unsigned long r)
+ /* Inserts string of length F, text_buf[r..r+F-1], into one of the
+ trees (text_buf[r]'th tree) and returns the longest-match position
+ and length via the global variables match_position and match_length.
+ If match_length = F, then removes the old node in favor of the new
+ one, because the old one will be deleted sooner.
+ Note r plays double role, as tree node and position in buffer. */
+{
+ unsigned long i, p, c;
+ signed long cmp;
+ unsigned char *key;
+
+ cmp = 1; key = &text_buf[r]; p = N + 1 + key[0];
+ rson[r] = lson[r] = NIL; match_length = 0;
+ for ( ; ; ) {
+ if (cmp >= 0) {
+ if (rson[p] != NIL) p = rson[p];
+ else { rson[p] = r; dad[r] = p; return; }
+ } else {
+ if (lson[p] != NIL) p = lson[p];
+ else { lson[p] = r; dad[r] = p; return; }
+ }
+ for (i = 1; i < F; i++)
+ if ((cmp = key[i] - text_buf[p + i]) != 0) break;
+ if (i > THRESHOLD) {
+ if (i > match_length) {
+ match_position = ((r - p) & (N - 1)) - 1;
+ if ((match_length = i) >= F) break;
+ }
+ if (i == match_length) {
+ if ((c = ((r - p) & (N - 1)) - 1) < match_position) {
+ match_position = c;
+ }
+ }
+ }
+ }
+ dad[r] = dad[p]; lson[r] = lson[p]; rson[r] = rson[p];
+ dad[lson[p]] = r; dad[rson[p]] = r;
+ if (rson[dad[p]] == p) rson[dad[p]] = r;
+ else lson[dad[p]] = r;
+ dad[p] = NIL; /* remove p */
+}
+
+static void DeleteNode(unsigned long p) /* deletes node p from tree */
+{
+ unsigned long q;
+
+ if (dad[p] == NIL) return; /* not in tree */
+ if (rson[p] == NIL) q = lson[p];
+ else if (lson[p] == NIL) q = rson[p];
+ else {
+ q = lson[p];
+ if (rson[q] != NIL) {
+ do { q = rson[q]; } while (rson[q] != NIL);
+ rson[dad[q]] = lson[q]; dad[lson[q]] = dad[q];
+ lson[q] = lson[p]; dad[lson[p]] = q;
+ }
+ rson[q] = rson[p]; dad[rson[p]] = q;
+ }
+ dad[q] = dad[p];
+ if (rson[dad[p]] == p) rson[dad[p]] = q; else lson[dad[p]] = q;
+ dad[p] = NIL;
+}
+
+/* Huffman coding */
+
+#define N_CHAR (256 - THRESHOLD + F)
+ /* kinds of characters (character code = 0..N_CHAR-1) */
+#define T (N_CHAR * 2 - 1) /* size of table */
+#define R (T - 1) /* position of root */
+#define MAX_FREQ 0x8000 /* updates tree when the */
+ /* root frequency comes to this value. */
+
+typedef unsigned long uchar; // much-much faster
+
+/* table for encoding and decoding the upper 6 bits of position */
+
+/* for encoding */
+static uchar p_len[64] = {
+ 0x03, 0x04, 0x04, 0x04, 0x05, 0x05, 0x05, 0x05,
+ 0x05, 0x05, 0x05, 0x05, 0x06, 0x06, 0x06, 0x06,
+ 0x06, 0x06, 0x06, 0x06, 0x06, 0x06, 0x06, 0x06,
+ 0x07, 0x07, 0x07, 0x07, 0x07, 0x07, 0x07, 0x07,
+ 0x07, 0x07, 0x07, 0x07, 0x07, 0x07, 0x07, 0x07,
+ 0x07, 0x07, 0x07, 0x07, 0x07, 0x07, 0x07, 0x07,
+ 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08,
+ 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08
+};
+
+static uchar p_code[64] = {
+ 0x00, 0x20, 0x30, 0x40, 0x50, 0x58, 0x60, 0x68,
+ 0x70, 0x78, 0x80, 0x88, 0x90, 0x94, 0x98, 0x9C,
+ 0xA0, 0xA4, 0xA8, 0xAC, 0xB0, 0xB4, 0xB8, 0xBC,
+ 0xC0, 0xC2, 0xC4, 0xC6, 0xC8, 0xCA, 0xCC, 0xCE,
+ 0xD0, 0xD2, 0xD4, 0xD6, 0xD8, 0xDA, 0xDC, 0xDE,
+ 0xE0, 0xE2, 0xE4, 0xE6, 0xE8, 0xEA, 0xEC, 0xEE,
+ 0xF0, 0xF1, 0xF2, 0xF3, 0xF4, 0xF5, 0xF6, 0xF7,
+ 0xF8, 0xF9, 0xFA, 0xFB, 0xFC, 0xFD, 0xFE, 0xFF
+};
+
+/* for decoding */
+static uchar d_code[256] = {
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
+ 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
+ 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02,
+ 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02,
+ 0x03, 0x03, 0x03, 0x03, 0x03, 0x03, 0x03, 0x03,
+ 0x03, 0x03, 0x03, 0x03, 0x03, 0x03, 0x03, 0x03,
+ 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04,
+ 0x05, 0x05, 0x05, 0x05, 0x05, 0x05, 0x05, 0x05,
+ 0x06, 0x06, 0x06, 0x06, 0x06, 0x06, 0x06, 0x06,
+ 0x07, 0x07, 0x07, 0x07, 0x07, 0x07, 0x07, 0x07,
+ 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08,
+ 0x09, 0x09, 0x09, 0x09, 0x09, 0x09, 0x09, 0x09,
+ 0x0A, 0x0A, 0x0A, 0x0A, 0x0A, 0x0A, 0x0A, 0x0A,
+ 0x0B, 0x0B, 0x0B, 0x0B, 0x0B, 0x0B, 0x0B, 0x0B,
+ 0x0C, 0x0C, 0x0C, 0x0C, 0x0D, 0x0D, 0x0D, 0x0D,
+ 0x0E, 0x0E, 0x0E, 0x0E, 0x0F, 0x0F, 0x0F, 0x0F,
+ 0x10, 0x10, 0x10, 0x10, 0x11, 0x11, 0x11, 0x11,
+ 0x12, 0x12, 0x12, 0x12, 0x13, 0x13, 0x13, 0x13,
+ 0x14, 0x14, 0x14, 0x14, 0x15, 0x15, 0x15, 0x15,
+ 0x16, 0x16, 0x16, 0x16, 0x17, 0x17, 0x17, 0x17,
+ 0x18, 0x18, 0x19, 0x19, 0x1A, 0x1A, 0x1B, 0x1B,
+ 0x1C, 0x1C, 0x1D, 0x1D, 0x1E, 0x1E, 0x1F, 0x1F,
+ 0x20, 0x20, 0x21, 0x21, 0x22, 0x22, 0x23, 0x23,
+ 0x24, 0x24, 0x25, 0x25, 0x26, 0x26, 0x27, 0x27,
+ 0x28, 0x28, 0x29, 0x29, 0x2A, 0x2A, 0x2B, 0x2B,
+ 0x2C, 0x2C, 0x2D, 0x2D, 0x2E, 0x2E, 0x2F, 0x2F,
+ 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37,
+ 0x38, 0x39, 0x3A, 0x3B, 0x3C, 0x3D, 0x3E, 0x3F,
+};
+
+static uchar d_len[256] = {
+ 0x03, 0x03, 0x03, 0x03, 0x03, 0x03, 0x03, 0x03,
+ 0x03, 0x03, 0x03, 0x03, 0x03, 0x03, 0x03, 0x03,
+ 0x03, 0x03, 0x03, 0x03, 0x03, 0x03, 0x03, 0x03,
+ 0x03, 0x03, 0x03, 0x03, 0x03, 0x03, 0x03, 0x03,
+ 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04,
+ 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04,
+ 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04,
+ 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04,
+ 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04,
+ 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04,
+ 0x05, 0x05, 0x05, 0x05, 0x05, 0x05, 0x05, 0x05,
+ 0x05, 0x05, 0x05, 0x05, 0x05, 0x05, 0x05, 0x05,
+ 0x05, 0x05, 0x05, 0x05, 0x05, 0x05, 0x05, 0x05,
+ 0x05, 0x05, 0x05, 0x05, 0x05, 0x05, 0x05, 0x05,
+ 0x05, 0x05, 0x05, 0x05, 0x05, 0x05, 0x05, 0x05,
+ 0x05, 0x05, 0x05, 0x05, 0x05, 0x05, 0x05, 0x05,
+ 0x05, 0x05, 0x05, 0x05, 0x05, 0x05, 0x05, 0x05,
+ 0x05, 0x05, 0x05, 0x05, 0x05, 0x05, 0x05, 0x05,
+ 0x06, 0x06, 0x06, 0x06, 0x06, 0x06, 0x06, 0x06,
+ 0x06, 0x06, 0x06, 0x06, 0x06, 0x06, 0x06, 0x06,
+ 0x06, 0x06, 0x06, 0x06, 0x06, 0x06, 0x06, 0x06,
+ 0x06, 0x06, 0x06, 0x06, 0x06, 0x06, 0x06, 0x06,
+ 0x06, 0x06, 0x06, 0x06, 0x06, 0x06, 0x06, 0x06,
+ 0x06, 0x06, 0x06, 0x06, 0x06, 0x06, 0x06, 0x06,
+ 0x07, 0x07, 0x07, 0x07, 0x07, 0x07, 0x07, 0x07,
+ 0x07, 0x07, 0x07, 0x07, 0x07, 0x07, 0x07, 0x07,
+ 0x07, 0x07, 0x07, 0x07, 0x07, 0x07, 0x07, 0x07,
+ 0x07, 0x07, 0x07, 0x07, 0x07, 0x07, 0x07, 0x07,
+ 0x07, 0x07, 0x07, 0x07, 0x07, 0x07, 0x07, 0x07,
+ 0x07, 0x07, 0x07, 0x07, 0x07, 0x07, 0x07, 0x07,
+ 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08,
+ 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08,
+};
+
+static unsigned long freq[T + 1]; /* frequency table */
+
+static unsigned long prnt[T + N_CHAR]; /* pointers to parent nodes, except for the */
+ /* elements [T..T + N_CHAR - 1] which are used to get */
+ /* the positions of leaves corresponding to the codes. */
+
+static unsigned long son[T]; /* pointers to child nodes (son[], son[] + 1) */
+
+/* initialization of tree */
+
+static void StartHuff(void)
+{
+ unsigned long i, j;
+
+ for (i = 0; i < N_CHAR; i++) {
+ freq[i] = 1;
+ son[i] = i + T;
+ prnt[i + T] = i;
+ }
+ i = 0; j = N_CHAR;
+ while (j <= R) {
+ freq[j] = freq[i] + freq[i + 1];
+ son[j] = i;
+ prnt[i] = prnt[i + 1] = j;
+ i += 2; j++;
+ }
+ freq[T] = 0xffff;
+ prnt[R] = 0;
+}
+
+/* reconstruction of tree */
+
+static void reconst(void)
+{
+ unsigned long f, l, i, j, k;
+
+ /* collect leaf nodes in the first half of the table */
+ /* and replace the freq by (freq + 1) / 2. */
+ j = 0;
+ for (i = 0; i < T; i++) {
+ if (son[i] >= T) {
+ freq[j] = (freq[i] + 1) / 2;
+ son[j] = son[i];
+ j++;
+ }
+ }
+ /* begin constructing tree by connecting sons */
+ for (i = 0, j = N_CHAR; j < T; i += 2, j++) {
+ k = i + 1;
+ f = freq[j] = freq[i] + freq[k];
+ for (k = j - 1; f < freq[k]; k--);
+ k++;
+ l = (j - k) * 2;
+ memmove(&freq[k + 1], &freq[k], l*sizeof(unsigned long));
+ freq[k] = f;
+ memmove(&son[k + 1], &son[k], l*sizeof(unsigned long));
+ son[k] = i;
+ }
+ /* connect prnt */
+ for (i = 0; i < T; i++) {
+ if ((k = son[i]) >= T) {
+ prnt[k] = i;
+ } else {
+ prnt[k] = prnt[k + 1] = i;
+ }
+ }
+}
+
+/* increment frequency of given code by one, and update tree */
+
+static void update(unsigned long c)
+{
+ unsigned long i, j, k, l;
+
+ if (freq[R] == MAX_FREQ) {
+ reconst();
+ }
+ c = prnt[c + T];
+ do {
+ k = ++freq[c];
+
+ /* if the order is disturbed, exchange nodes */
+ if (k > freq[l = c + 1]) {
+ while (k > freq[++l]);
+ l--;
+ freq[c] = freq[l];
+ freq[l] = k;
+
+ i = son[c];
+ prnt[i] = l;
+ if (i < T) prnt[i + 1] = l;
+
+ j = son[l];
+ son[l] = i;
+
+ prnt[j] = c;
+ if (j < T) prnt[j + 1] = c;
+ son[c] = j;
+
+ c = l;
+ }
+ } while (c = prnt[c]); /* repeat up to root */
+}
+
+/* modified for block compression */
+/* on return, srclen will contain the number of successfully compressed bytes
+ and dstlen will contain completed compressed bytes */
+
+static int Encode(unsigned char *srcbuf, unsigned char *dstbuf, unsigned long *srclen,
+ unsigned long *dstlen)
+{
+ unsigned long c, i, j, k, len, r, s, last_match_length, code_buf_ptr;
+ unsigned char code_buf[17], mask;
+ unsigned char *ip, *op;
+ unsigned long written = 0;
+ unsigned long read = 0;
+ unsigned short putbuf = 0;
+ uchar putlen = 0;
+ unsigned char *srcend = srcbuf + *srclen;
+ unsigned char *dstend = dstbuf + *dstlen;
+ ip = srcbuf;
+ op = dstbuf;
+ StartHuff();
+ InitTree(); /* initialize trees */
+ code_buf[0] = 0; /* code_buf[1..16] saves eight units of code, and
+ code_buf[0] works as eight flags, "1" representing that the unit
+ is an unencoded letter (1 byte), "0" a position-and-length pair
+ (2 bytes). Thus, eight units require at most 16 bytes of code. */
+ code_buf_ptr = mask = 1;
+ s = 0; r = N - F;
+ for (i = s; i < r; i++) text_buf[i] = ' '; /* Clear the buffer with
+ any character that will appear often. */
+ for (len = 0; (len < F) && (ip < srcend); len++)
+ text_buf[r + len] = *(ip++); /* Read F bytes into the last F bytes of
+ the buffer */
+ read = len;
+ for (i = 1; i <= F; i++) InsertNode(r - i); /* Insert the F strings,
+ each of which begins with one or more 'space' characters. Note
+ the order in which these strings are inserted. This way,
+ degenerate trees will be less likely to occur. */
+ InsertNode(r); /* Finally, insert the whole string just read. The
+ global variables match_length and match_position are set. */
+ do {
+ if (match_length > len) match_length = len; /* match_length
+ may be spuriously long near the end of text. */
+ if (match_length <= THRESHOLD) {
+ match_length = 1; /* Not long enough match. Send one byte. */
+ c = text_buf[r];
+ i = 0; j = 0; k = prnt[c + T];
+ do {
+ i >>= 1;
+ /* if node's address is odd-numbered, choose bigger brother node */
+ if (k & 1) i |= 0x8000;
+ j++;
+ } while ((k = prnt[k]) != R);
+ putbuf |= i >> putlen;
+ if ((putlen += j) >= 8) {
+ if (op >= dstend) {
+ *dstlen = written;
+ return -1;
+ }
+ *(op++) = putbuf >> 8;
+ if ((putlen -= 8) >= 8) {
+ if (op >= dstend) {
+ *dstlen = written;
+ return -1;
+ }
+ *(op++) = putbuf;
+ written += 2;
+ putlen -= 8;
+ putbuf = i << (j - putlen); /**warm**/
+ } else {
+ putbuf <<= 8;
+ written++;
+ }
+ *srclen = read;
+ }
+ update(c);
+ } else {
+ c = 255 - THRESHOLD + match_length;
+ i = 0; j = 0; k = prnt[c + T];
+ do {
+ i >>= 1;
+ /* if node's address is odd-numbered, choose bigger brother node */
+ if (k & 1) i |= 0x8000;
+ j++;
+ } while ((k = prnt[k]) != R);
+ putbuf |= i >> putlen;
+ if ((putlen += j) >= 8) {
+ if (op >= dstend) {
+ *dstlen = written;
+ return -1;
+ }
+ *(op++) = putbuf >> 8;
+ if ((putlen -= 8) >= 8) {
+ if (op >= dstend) {
+ *dstlen = written;
+ return -1;
+ }
+ *(op++) = putbuf;
+ written += 2;
+ putlen -= 8;
+ putbuf = i << (j - putlen); /**warm**/
+ } else {
+ putbuf <<= 8;
+ written++;
+ }
+ *srclen = read;
+ }
+ update(c);
+ j = p_len[match_position >> 6];
+ i = p_code[match_position >> 6] << 8;
+ putbuf |= i >> putlen;
+ if ((putlen += j) >= 8) {
+ if (op >= dstend) {
+ *dstlen = written;
+ return -1;
+ }
+ *(op++) = putbuf >> 8;
+ if ((putlen -= 8) >= 8) {
+ if (op >= dstend) {
+ *dstlen = written;
+ return -1;
+ }
+ *(op++) = putbuf;
+ written += 2;
+ putlen -= 8;
+ putbuf = i << (j - putlen); /**hot**/
+ } else {
+ putbuf <<= 8;
+ written++;
+ }
+ *srclen = read;
+ }
+ j = 6;
+ i = (match_position & 0x3f) << 10;
+ putbuf |= i >> putlen;
+ if ((putlen += j) >= 8) {
+ if (op >= dstend) {
+ *dstlen = written;
+ return -1;
+ }
+ *(op++) = putbuf >> 8;
+ if ((putlen -= 8) >= 8) {
+ if (op >= dstend) {
+ *dstlen = written;
+ return -1;
+ }
+ *(op++) = putbuf;
+ written += 2;
+ putlen -= 8;
+ putbuf = i << (j - putlen); /**hot**/
+ } else {
+ putbuf <<= 8;
+ written++;
+ }
+ *srclen = read;
+ }
+ }
+ last_match_length = match_length;
+ for (i = 0; (i < last_match_length) && (ip < srcend); i++) {
+ c = *(ip++);
+ DeleteNode(s);
+ text_buf[s] = c;
+ if (s < F - 1)
+ text_buf[s + N] = c;
+ s = (s + 1) & (N - 1);
+ r = (r + 1) & (N - 1);
+ InsertNode(r);
+ }
+ read += i;
+ while (i++ < last_match_length) {
+ DeleteNode(s);
+ s = (s + 1) & (N - 1);
+ r = (r + 1) & (N - 1);
+ if (--len) InsertNode(r);
+ }
+ } while (len > 0);
+ if (putlen) {
+ if (op >= dstend) {
+ *dstlen = written;
+ return -1;
+ }
+ *(op++) = putbuf >> 8;
+ written++;
+ *srclen = read;
+ }
+ *dstlen = written;
+ return 0;
+}
+
+static int Decode(unsigned char *srcbuf, unsigned char *dstbuf, unsigned long srclen,
+ unsigned long dstlen) /* Just the reverse of Encode(). */
+{
+ unsigned long i, r, j, k, c;
+ unsigned char *ip, *op;
+ unsigned char *srcend = srcbuf + srclen;
+ unsigned char *dstend = dstbuf + dstlen;
+ unsigned short getbuf = 0;
+ uchar getlen = 0;
+ ip = srcbuf;
+ op = dstbuf;
+ StartHuff();
+ for (i = 0; i < N - F; i++) text_buf[i] = ' ';
+ r = N - F;
+ while (op < dstend) {
+ c = son[R];
+ /* travel from root to leaf, */
+ /* choosing the smaller child node (son[]) if the read bit is 0, */
+ /* the bigger (son[]+1} if 1 */
+ while (c < T) {
+ while (getlen <= 8) {
+ unsigned short t;
+ t = (ip >= srcend) ? 0 : *(ip++);
+ getbuf |= t << (8 - getlen);
+ getlen += 8;
+ }
+ c += ((signed short)getbuf < 0);
+ getbuf <<= 1;
+ getlen--;
+ c = son[c];
+ }
+ c -= T;
+ update(c);
+ if (c < 256) {
+ if (op >= dstend) return -1;
+ *(op++) = c;
+ text_buf[r++] = c;
+ r &= (N - 1);
+ } else {
+ j = c - 255 + THRESHOLD;
+ while (getlen <= 8) {
+ unsigned short t;
+ t = (ip >= srcend) ? 0 : *(ip++);
+ getbuf |= t << (8 - getlen);
+ getlen += 8;
+ }
+ i = getbuf >> 8;
+ getbuf <<= 8;
+ getlen -= 8;
+ c = d_code[i] << 6;
+ k = d_len[i];
+ /* read lower 6 bits verbatim */
+ k -= 2;
+ while (k--) {
+ while (getlen <= 8) {
+ unsigned short t;
+ t = (ip >= srcend) ? 0 : *(ip++);
+ getbuf |= t << (8 - getlen);
+ getlen += 8;
+ }
+ i = (i << 1) + ((signed short)getbuf < 0);
+ getbuf <<= 1;
+ getlen--;
+ }
+ i = c | (i & 0x3F);
+ i = r - i - 1;
+ i &= (N - 1);
+ for (k = 0; k < j; k++) {
+ c = text_buf[(i + k) & (N - 1)];
+ if (op >= dstend) return -1;
+ *(op++) = c;
+ text_buf[r++] = c;
+ r &= (N - 1);
+ }
+ }
+ }
+ return 0;
+}
+
+/* interface to jffs2 bbc follows */
+
+#include "jffs2_bbc_framework.h"
+
+
+#define JFFS2_BBC_LZHD_BLOCK_SIGN {0x3a, 0x98, 0xf7, 0xda}
+
+static int
+jffs2_bbc_lzhd_compressor_init (void);
+
+static void
+jffs2_bbc_lzhd_compressor_deinit (void);
+
+static int
+jffs2_bbc_lzhd_compress (void *model, unsigned char *input,
+ unsigned char *output, unsigned long *sourcelen,
+ unsigned long *dstlen);
+
+static int
+jffs2_bbc_lzhd_estimate (void *model, unsigned char *input,
+ unsigned long sourcelen, unsigned long *dstlen,
+ unsigned long *readtime, unsigned long *writetime);
+
+static int
+jffs2_bbc_lzhd_decompress (void *model, unsigned char *input,
+ unsigned char *output, unsigned long sourcelen,
+ unsigned long dstlen);
+
+static char *
+jffs2_bbc_lzhd_proc_info (void);
+
+static int
+jffs2_bbc_lzhd_proc_command (char *command);
+
+struct jffs2_bbc_compressor_type jffs2_bbc_lzhd = {
+ "lzhd",
+ 0,
+ JFFS2_BBC_LZHD_BLOCK_SIGN,
+ jffs2_bbc_lzhd_compressor_init,
+ NULL,
+ NULL,
+ jffs2_bbc_lzhd_compressor_deinit,
+ jffs2_bbc_lzhd_compress,
+ jffs2_bbc_lzhd_estimate,
+ jffs2_bbc_lzhd_decompress,
+ jffs2_bbc_lzhd_proc_info,
+ jffs2_bbc_lzhd_proc_command
+};
+
+static int
+jffs2_bbc_lzhd_compressor_init (void)
+{
+ return 0;
+}
+
+static void
+jffs2_bbc_lzhd_compressor_deinit (void)
+{
+}
+
+static int
+jffs2_bbc_lzhd_compress (void *model, unsigned char *input,
+ unsigned char *output, unsigned long *sourcelen,
+ unsigned long *dstlen)
+{
+ int retval;
+ unsigned long dst = *dstlen;
+ *(output++) = jffs2_bbc_lzhd.block_sign[0];
+ *(output++) = jffs2_bbc_lzhd.block_sign[1];
+ dst -= 2;
+ retval = Encode(input, output, sourcelen, &dst);
+ dst += 2;
+ *dstlen = dst;
+ return retval;
+}
+
+static int
+jffs2_bbc_lzhd_estimate (void *model, unsigned char *input,
+ unsigned long sourcelen, unsigned long *dstlen,
+ unsigned long *readtime, unsigned long *writetime)
+{
+ *dstlen = sourcelen * 55 / 100;
+ *readtime = JFFS2_BBC_ZLIB_READ_TIME * 8;
+ *writetime = JFFS2_BBC_ZLIB_WRITE_TIME * 65 / 10;
+ return 0;
+}
+
+static int
+jffs2_bbc_lzhd_decompress (void *model, unsigned char *input,
+ unsigned char *output, unsigned long sourcelen,
+ unsigned long dstlen)
+{
+ if ( ( *(input++) != (unsigned char)jffs2_bbc_lzhd.block_sign[0] ) ||
+ ( *(input++) != (unsigned char)jffs2_bbc_lzhd.block_sign[1] )
+ ) {
+ return -1;
+ } else {
+ return Decode(input, output, sourcelen - 2, dstlen);
+ }
+}
+
+static char *
+jffs2_bbc_lzhd_proc_info (void)
+{
+ return "Lempel-Ziv-(dynamic) Huffman compression module";
+}
+
+static int
+jffs2_bbc_lzhd_proc_command (char *command)
+{
+ return 0;
+}
+
+struct jffs2_bbc_compressor_type *
+jffs2_bbc_lzhd_init (int mode)
+{
+ if (jffs2_bbc_register_compressor (&jffs2_bbc_lzhd) == 0)
+ {
+ return &jffs2_bbc_lzhd;
+ }
+ else
+ {
+ return NULL;
+ }
+}
+
+void
+jffs2_bbc_lzhd_deinit (void)
+{
+ jffs2_bbc_unregister_compressor (&jffs2_bbc_lzhd);
+}
Index: linux-2.4.35.4/fs/jffs2/jffs2_bbc_lzo_comp.c
===================================================================
--- /dev/null
+++ linux-2.4.35.4/fs/jffs2/jffs2_bbc_lzo_comp.c
@@ -0,0 +1,2435 @@
+/* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 4; tab-width: 4 -*- */
+
+/*
+ jffs2_bbc_lzo_comp.c -- LZO1X-1 (and -999) compression module for jffs2
+ Copyright (C) 2004 Patrik Kluba
+ Based on the original LZO sources
+ $Header: /openwrt/openwrt/package/linux/kernel-patches/301-jffs-compression,v 1.1 2005/03/26 10:33:31 wbx Exp $
+*/
+
+/*
+ Original copyright notice follows:
+
+ lzo1x_9x.c -- implementation of the LZO1X-999 compression algorithm
+ lzo_ptr.h -- low-level pointer constructs
+ lzo_swd.ch -- sliding window dictionary
+ lzoconf.h -- configuration for the LZO real-time data compression library
+ lzo_mchw.ch -- matching functions using a window
+ minilzo.c -- mini subset of the LZO real-time data compression library
+ config1x.h -- configuration for the LZO1X algorithm
+ lzo1x.h -- public interface of the LZO1X compression algorithm
+
+ These files are part of the LZO real-time data compression library.
+
+ Copyright (C) 1996-2002 Markus Franz Xaver Johannes Oberhumer
+ All Rights Reserved.
+
+ The LZO library 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.
+
+ The LZO library 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 the LZO library; see the file COPYING.
+ If not, write to the Free Software Foundation, Inc.,
+ 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+
+ Markus F.X.J. Oberhumer
+ <markus@oberhumer.com>
+*/
+
+/*
+
+ 2004-02-16 pajko <pajko(AT)halom(DOT)u-szeged(DOT)hu>
+ Initial release
+ -removed all 16 bit code
+ -all sensitive data will be on 4 byte boundary
+ -removed check parts for library use
+ -removed all but LZO1X-* compression
+
+*/
+
+#ifndef __KERNEL__
+ #include <sys/types.h>
+ #include <stddef.h>
+ #include <string.h>
+ #include <limits.h>
+#else
+ #include <linux/kernel.h>
+ #include <linux/types.h>
+ #include <linux/stddef.h>
+ #include <linux/string.h>
+ #define USHRT_MAX 65535
+ /* #define UINT_MAX 4294967295U */
+#endif
+
+/* data type definitions */
+#define U32 unsigned long
+#define S32 signed long
+#define I32 long
+#define U16 unsigned short
+#define S16 signed short
+#define I16 short
+#define U8 unsigned char
+#define S8 signed char
+#define I8 char
+
+/*************************************/
+
+/* lzo_swd.ch */
+
+#define SWD_N N
+#define SWD_F F
+#define SWD_THRESHOLD THRESHOLD
+
+/* shortest unsigned int that 2 * SWD_F + SWD_N (currently 53248) fits in */
+typedef unsigned short swd_uint;
+/* upper limit of that data type */
+#define SWD_UINT_MAX USHRT_MAX
+
+/* minilzo.c */
+
+#define LZO_VERSION_DATE "Jul 12 2002"
+#define LZO_VERSION_STRING "1.08"
+#define LZO_VERSION 0x1080
+
+/* lzo_ptr.h */
+
+/* Integral types that have *exactly* the same number of bits as a lzo_voidp */
+typedef unsigned long lzo_ptr_t;
+typedef long lzo_sptr_t;
+
+
+/*************************************/
+
+/* config1x.h */
+
+#define M1_MAX_OFFSET 0x0400
+#define M2_MAX_OFFSET 0x0800
+#define M3_MAX_OFFSET 0x4000
+#define M4_MAX_OFFSET 0xbfff
+
+#define MX_MAX_OFFSET (M1_MAX_OFFSET + M2_MAX_OFFSET)
+
+#define M1_MIN_LEN 2
+#define M1_MAX_LEN 2
+#define M2_MIN_LEN 3
+#define M2_MAX_LEN 8
+#define M3_MIN_LEN 3
+#define M3_MAX_LEN 33
+#define M4_MIN_LEN 3
+#define M4_MAX_LEN 9
+
+#define M1_MARKER 0
+#define M2_MARKER 64
+#define M3_MARKER 32
+#define M4_MARKER 16
+
+#define MIN_LOOKAHEAD (M2_MAX_LEN + 1)
+
+/* minilzo.c */
+
+#define LZO_BYTE(x) ((unsigned char) ((x) & 0xff))
+
+#define LZO_MAX(a,b) ((a) >= (b) ? (a) : (b))
+#define LZO_MIN(a,b) ((a) <= (b) ? (a) : (b))
+#define LZO_MAX3(a,b,c) ((a) >= (b) ? LZO_MAX(a,c) : LZO_MAX(b,c))
+#define LZO_MIN3(a,b,c) ((a) <= (b) ? LZO_MIN(a,c) : LZO_MIN(b,c))
+
+#define lzo_sizeof(type) ((lzo_uint) (sizeof(type)))
+
+#define LZO_HIGH(array) ((lzo_uint) (sizeof(array)/sizeof(*(array))))
+
+#define LZO_SIZE(bits) (1u << (bits))
+#define LZO_MASK(bits) (LZO_SIZE(bits) - 1)
+
+#define LZO_LSIZE(bits) (1ul << (bits))
+#define LZO_LMASK(bits) (LZO_LSIZE(bits) - 1)
+
+#define LZO_USIZE(bits) ((lzo_uint) 1 << (bits))
+#define LZO_UMASK(bits) (LZO_USIZE(bits) - 1)
+
+#define LZO_STYPE_MAX(b) (((1l << (8*(b)-2)) - 1l) + (1l << (8*(b)-2)))
+#define LZO_UTYPE_MAX(b) (((1ul << (8*(b)-1)) - 1ul) + (1ul << (8*(b)-1)))
+
+#define _LZO_STRINGIZE(x) #x
+#define _LZO_MEXPAND(x) _LZO_STRINGIZE(x)
+
+#define _LZO_CONCAT2(a,b) a ## b
+#define _LZO_CONCAT3(a,b,c) a ## b ## c
+#define _LZO_CONCAT4(a,b,c,d) a ## b ## c ## d
+#define _LZO_CONCAT5(a,b,c,d,e) a ## b ## c ## d ## e
+
+#define _LZO_ECONCAT2(a,b) _LZO_CONCAT2(a,b)
+#define _LZO_ECONCAT3(a,b,c) _LZO_CONCAT3(a,b,c)
+#define _LZO_ECONCAT4(a,b,c,d) _LZO_CONCAT4(a,b,c,d)
+#define _LZO_ECONCAT5(a,b,c,d,e) _LZO_CONCAT5(a,b,c,d,e)
+
+#define lzo_dict_t const lzo_bytep
+#define lzo_dict_p lzo_dict_t *
+#define lzo_moff_t lzo_uint
+
+#define MEMCPY8_DS(dest,src,len) \
+ memcpy(dest,src,len); \
+ dest += len; \
+ src += len
+
+#define MEMCPY_DS(dest,src,len) \
+ do *dest++ = *src++; \
+ while (--len > 0)
+
+#define MEMMOVE_DS(dest,src,len) \
+ do *dest++ = *src++; \
+ while (--len > 0)
+
+#define BZERO8_PTR(s,l,n) memset((s),0,(lzo_uint)(l)*(n))
+
+#define LZO_BASE 65521u
+#define LZO_NMAX 5552
+
+#define LZO_DO1(buf,i) {s1 += buf[i]; s2 += s1;}
+#define LZO_DO2(buf,i) LZO_DO1(buf,i); LZO_DO1(buf,i+1);
+#define LZO_DO4(buf,i) LZO_DO2(buf,i); LZO_DO2(buf,i+2);
+#define LZO_DO8(buf,i) LZO_DO4(buf,i); LZO_DO4(buf,i+4);
+#define LZO_DO16(buf,i) LZO_DO8(buf,i); LZO_DO8(buf,i+8);
+
+#define IS_SIGNED(type) (((type) (-1)) < ((type) 0))
+#define IS_UNSIGNED(type) (((type) (-1)) > ((type) 0))
+
+#define IS_POWER_OF_2(x) (((x) & ((x) - 1)) == 0)
+
+#define D_BITS 14
+#define D_INDEX1(d,p) d = DM((0x21*DX3(p,5,5,6)) >> 5)
+#define D_INDEX2(d,p) d = (d & (D_MASK & 0x7ff)) ^ (D_HIGH | 0x1f)
+
+#define LZO_HASH LZO_HASH_LZO_INCREMENTAL_B
+
+#define DL_MIN_LEN M2_MIN_LEN
+
+#define D_SIZE LZO_SIZE(D_BITS)
+#define D_MASK LZO_MASK(D_BITS)
+
+#define D_HIGH ((D_MASK >> 1) + 1)
+
+#define DINDEX1 D_INDEX1
+#define DINDEX2 D_INDEX2
+
+#define DX2(p,s1,s2) \
+ (((((lzo_uint32)((p)[2]) << (s2)) ^ (p)[1]) << (s1)) ^ (p)[0])
+
+#define DX3(p,s1,s2,s3) ((DX2((p)+1,s2,s3) << (s1)) ^ (p)[0])
+#define DMS(v,s) ((lzo_uint) (((v) & (D_MASK >> (s))) << (s)))
+#define DM(v) DMS(v,0)
+
+#define DENTRY(p,in) (p)
+#define GINDEX(m_pos,m_off,dict,dindex,in) m_pos = dict[dindex]
+
+#define LZO_CHECK_MPOS_DET(m_pos,m_off,in,ip,max_offset) \
+ (m_pos == NULL || (m_off = (lzo_moff_t) (ip - m_pos)) > max_offset)
+
+#define LZO_CHECK_MPOS_NON_DET(m_pos,m_off,in,ip,max_offset) \
+ (BOUNDS_CHECKING_OFF_IN_EXPR( \
+ (PTR_LT(m_pos,in) || \
+ (m_off = (lzo_moff_t) PTR_DIFF(ip,m_pos)) <= 0 || \
+ m_off > max_offset) ))
+
+#define BOUNDS_CHECKING_OFF_IN_EXPR(expr) (expr)
+
+#define DD_BITS 0
+#define DD_SIZE LZO_SIZE(DD_BITS)
+#define DD_MASK LZO_MASK(DD_BITS)
+
+#define DL_BITS (D_BITS - DD_BITS)
+#define DL_SIZE LZO_SIZE(DL_BITS)
+#define DL_MASK LZO_MASK(DL_BITS)
+
+#define UPDATE_D(dict,drun,dv,p,in) dict[ DINDEX(dv,p) ] = DENTRY(p,in)
+#define UPDATE_I(dict,drun,index,p,in) dict[index] = DENTRY(p,in)
+#define UPDATE_P(ptr,drun,p,in) (ptr)[0] = DENTRY(p,in)
+
+#define __COPY4(dst,src) * (lzo_uint32p)(dst) = * (const lzo_uint32p)(src)
+#define COPY4(dst,src) __COPY4((lzo_ptr_t)(dst),(lzo_ptr_t)(src))
+
+#define TEST_IP (ip < ip_end)
+#define TEST_OP (op <= op_end)
+
+#define NEED_IP(x) \
+ if ((lzo_uint)(ip_end - ip) < (lzo_uint)(x)) goto input_overrun
+#define NEED_OP(x) \
+ if ((lzo_uint)(op_end - op) < (lzo_uint)(x)) goto output_overrun
+#define TEST_LOOKBEHIND(m_pos,out) if (m_pos < out) goto lookbehind_overrun
+
+/* lzo1x_9x.c */
+
+#define LZO_UINT_MAX UINT_MAX
+#define N M4_MAX_OFFSET
+#define THRESHOLD 1
+#define F 2048
+
+#define SWD_BEST_OFF (LZO_MAX3( M2_MAX_LEN, M3_MAX_LEN, M4_MAX_LEN ) + 1)
+
+/* ../include/lzoconf.h */
+
+typedef U32 lzo_uint32;
+typedef I32 lzo_int32;
+typedef U32 lzo_uint;
+typedef I32 lzo_int;
+typedef int lzo_bool;
+
+#define lzo_byte U8
+#define lzo_bytep U8 *
+#define lzo_charp char *
+#define lzo_voidp void *
+#define lzo_shortp short *
+#define lzo_ushortp unsigned short *
+#define lzo_uint32p lzo_uint32 *
+#define lzo_int32p lzo_int32 *
+#define lzo_uintp lzo_uint *
+#define lzo_intp lzo_int *
+#define lzo_voidpp lzo_voidp *
+#define lzo_bytepp lzo_bytep *
+#define lzo_sizeof_dict_t sizeof(lzo_bytep)
+
+#define LZO_E_OK 0
+#define LZO_E_ERROR (-1)
+#define LZO_E_OUT_OF_MEMORY (-2) /* not used right now */
+#define LZO_E_NOT_COMPRESSIBLE (-3) /* not used right now */
+#define LZO_E_INPUT_OVERRUN (-4)
+#define LZO_E_OUTPUT_OVERRUN (-5)
+#define LZO_E_LOOKBEHIND_OVERRUN (-6)
+#define LZO_E_EOF_NOT_FOUND (-7)
+#define LZO_E_INPUT_NOT_CONSUMED (-8)
+
+#define LZO_PTR_ALIGN_UP(_ptr,_size) \
+ ((_ptr) + (lzo_uint) __lzo_align_gap((const lzo_voidp)(_ptr),(lzo_uint)(_size)))
+#define LZO_ALIGN(_ptr,_size) LZO_PTR_ALIGN_UP(_ptr,_size)
+
+typedef int
+ (*lzo_compress_t) (const lzo_byte * src, lzo_uint src_len,
+ lzo_byte * dst, lzo_uintp dst_len,
+ lzo_voidp wrkmem);
+
+typedef int
+ (*lzo_decompress_t) (const lzo_byte * src, lzo_uint src_len,
+ lzo_byte * dst, lzo_uintp dst_len,
+ lzo_voidp wrkmem);
+
+typedef int
+ (*lzo_optimize_t) (lzo_byte * src, lzo_uint src_len,
+ lzo_byte * dst, lzo_uintp dst_len,
+ lzo_voidp wrkmem);
+
+typedef int
+ (*lzo_compress_dict_t) (const lzo_byte * src, lzo_uint src_len,
+ lzo_byte * dst, lzo_uintp dst_len,
+ lzo_voidp wrkmem,
+ const lzo_byte * dict, lzo_uint dict_len);
+
+typedef int
+ (*lzo_decompress_dict_t) (const lzo_byte * src, lzo_uint src_len,
+ lzo_byte * dst, lzo_uintp dst_len,
+ lzo_voidp wrkmem,
+ const lzo_byte * dict, lzo_uint dict_len);
+
+typedef int
+ (*lzo_compress_asm_t) (const lzo_byte * src, lzo_uint src_len,
+ lzo_byte * dst, lzo_uintp dst_len,
+ lzo_voidp wrkmem);
+
+typedef int
+ (*lzo_decompress_asm_t) (const lzo_byte * src, lzo_uint src_len,
+ lzo_byte * dst, lzo_uintp dst_len,
+ lzo_voidp wrkmem);
+
+typedef void (*lzo_progress_callback_t) (lzo_uint, lzo_uint);
+
+typedef union
+{
+ lzo_bytep p;
+ lzo_uint u;
+} __lzo_pu_u;
+typedef union
+{
+ lzo_bytep p;
+ lzo_uint32 u32;
+} __lzo_pu32_u;
+typedef union
+{
+ void *vp;
+ lzo_bytep bp;
+ lzo_uint32 u32;
+ long l;
+} lzo_align_t;
+
+/* lzo1x.h */
+
+#define LZO1X_1_MEM_COMPRESS ((lzo_uint32) (16384L * lzo_sizeof_dict_t))
+#define LZO1X_999_MEM_COMPRESS ((lzo_uint32) (14 * 16384L * sizeof(short)))
+
+/* lzo_ptr.h */
+
+#define PTR(a) ((lzo_ptr_t) (a))
+#define PTR_LINEAR(a) PTR(a)
+#define PTR_ALIGNED_4(a) ((PTR_LINEAR(a) & 3) == 0)
+#define PTR_ALIGNED_8(a) ((PTR_LINEAR(a) & 7) == 0)
+#define PTR_ALIGNED2_4(a,b) (((PTR_LINEAR(a) | PTR_LINEAR(b)) & 3) == 0)
+#define PTR_ALIGNED2_8(a,b) (((PTR_LINEAR(a) | PTR_LINEAR(b)) & 7) == 0)
+#define PTR_LT(a,b) (PTR(a) < PTR(b))
+#define PTR_GE(a,b) (PTR(a) >= PTR(b))
+#define PTR_DIFF(a,b) ((lzo_ptrdiff_t) (PTR(a) - PTR(b)))
+#define pd(a,b) ((lzo_uint) ((a)-(b)))
+
+typedef ptrdiff_t lzo_ptrdiff_t;
+
+typedef union
+{
+ char a_char;
+ unsigned char a_uchar;
+ short a_short;
+ unsigned short a_ushort;
+ int a_int;
+ unsigned int a_uint;
+ long a_long;
+ unsigned long a_ulong;
+ lzo_int a_lzo_int;
+ lzo_uint a_lzo_uint;
+ lzo_int32 a_lzo_int32;
+ lzo_uint32 a_lzo_uint32;
+ ptrdiff_t a_ptrdiff_t;
+ lzo_ptrdiff_t a_lzo_ptrdiff_t;
+ lzo_ptr_t a_lzo_ptr_t;
+ lzo_voidp a_lzo_voidp;
+ void *a_void_p;
+ lzo_bytep a_lzo_bytep;
+ lzo_bytepp a_lzo_bytepp;
+ lzo_uintp a_lzo_uintp;
+ lzo_uint *a_lzo_uint_p;
+ lzo_uint32p a_lzo_uint32p;
+ lzo_uint32 *a_lzo_uint32_p;
+ unsigned char *a_uchar_p;
+ char *a_char_p;
+}
+lzo_full_align_t;
+
+/* lzo_mchw.ch */
+
+typedef struct
+{
+ int init;
+
+ lzo_uint look;
+
+ lzo_uint m_len;
+ lzo_uint m_off;
+
+ lzo_uint last_m_len;
+ lzo_uint last_m_off;
+
+ const lzo_byte *bp;
+ const lzo_byte *ip;
+ const lzo_byte *in;
+ const lzo_byte *in_end;
+ lzo_byte *out;
+
+ lzo_progress_callback_t cb;
+
+ lzo_uint textsize;
+ lzo_uint codesize;
+ lzo_uint printcount;
+
+ unsigned long lit_bytes;
+ unsigned long match_bytes;
+ unsigned long rep_bytes;
+ unsigned long lazy;
+
+ lzo_uint r1_lit;
+ lzo_uint r1_m_len;
+
+ unsigned long m1a_m, m1b_m, m2_m, m3_m, m4_m;
+ unsigned long lit1_r, lit2_r, lit3_r;
+}
+lzo1x_999_t;
+
+#define getbyte(c) ((c).ip < (c).in_end ? *((c).ip)++ : (-1))
+
+/* lzo_swd.ch */
+
+#define SWD_UINT(x) ((swd_uint)(x))
+#define SWD_HSIZE 16384
+#define SWD_MAX_CHAIN 2048
+#define HEAD3(b,p) \
+ (((0x9f5f*(((((lzo_uint32)b[p]<<5)^b[p+1])<<5)^b[p+2]))>>5) & (SWD_HSIZE-1))
+#define HEAD2(b,p) (b[p] ^ ((unsigned)b[p+1]<<8))
+#define NIL2 SWD_UINT_MAX
+
+typedef struct
+{
+ lzo_uint n;
+ lzo_uint f;
+ lzo_uint threshold;
+
+ lzo_uint max_chain;
+ lzo_uint nice_length;
+ lzo_bool use_best_off;
+ lzo_uint lazy_insert;
+
+ lzo_uint m_len;
+ lzo_uint m_off;
+ lzo_uint look;
+ int b_char;
+
+ lzo_uint best_off[SWD_BEST_OFF];
+
+ lzo1x_999_t *c;
+ lzo_uint m_pos;
+
+ lzo_uint best_pos[SWD_BEST_OFF];
+
+ const lzo_byte *dict;
+ const lzo_byte *dict_end;
+ lzo_uint dict_len;
+
+ lzo_uint ip;
+ lzo_uint bp;
+ lzo_uint rp;
+ lzo_uint b_size;
+
+ unsigned char *b_wrap;
+
+ lzo_uint node_count;
+ lzo_uint first_rp;
+
+ unsigned char b[SWD_N + SWD_F + SWD_F];
+ swd_uint head3[SWD_HSIZE];
+ swd_uint succ3[SWD_N + SWD_F];
+ swd_uint best3[SWD_N + SWD_F];
+ swd_uint llen3[SWD_HSIZE];
+
+ swd_uint head2[65536L];
+}
+lzo1x_999_swd_t;
+
+#define s_head3(s,key) s->head3[key]
+#define swd_pos2off(s,pos) \
+ (s->bp > (pos) ? s->bp - (pos) : s->b_size - ((pos) - s->bp))
+
+static __inline__ void
+swd_getbyte (lzo1x_999_swd_t * s)
+{
+ int c;
+
+ if ((c = getbyte (*(s->c))) < 0)
+ {
+ if (s->look > 0)
+ --s->look;
+ }
+ else
+ {
+ s->b[s->ip] = LZO_BYTE (c);
+ if (s->ip < s->f)
+ s->b_wrap[s->ip] = LZO_BYTE (c);
+ }
+ if (++s->ip == s->b_size)
+ s->ip = 0;
+ if (++s->bp == s->b_size)
+ s->bp = 0;
+ if (++s->rp == s->b_size)
+ s->rp = 0;
+}
+
+static void
+swd_initdict (lzo1x_999_swd_t * s, const lzo_byte * dict, lzo_uint dict_len)
+{
+ s->dict = s->dict_end = NULL;
+ s->dict_len = 0;
+
+ if (!dict || dict_len <= 0)
+ return;
+ if (dict_len > s->n)
+ {
+ dict += dict_len - s->n;
+ dict_len = s->n;
+ }
+
+ s->dict = dict;
+ s->dict_len = dict_len;
+ s->dict_end = dict + dict_len;
+ memcpy (s->b, dict, dict_len);
+ s->ip = dict_len;
+}
+
+static void
+swd_insertdict (lzo1x_999_swd_t * s, lzo_uint node, lzo_uint len)
+{
+ lzo_uint key;
+
+ s->node_count = s->n - len;
+ s->first_rp = node;
+
+ while (len-- > 0)
+ {
+ key = HEAD3 (s->b, node);
+ s->succ3[node] = s_head3 (s, key);
+ s->head3[key] = SWD_UINT (node);
+ s->best3[node] = SWD_UINT (s->f + 1);
+ s->llen3[key]++;
+
+ key = HEAD2 (s->b, node);
+ s->head2[key] = SWD_UINT (node);
+
+ node++;
+ }
+}
+
+static int
+swd_init (lzo1x_999_swd_t * s, const lzo_byte * dict, lzo_uint dict_len)
+{
+
+ s->n = SWD_N;
+ s->f = SWD_F;
+ s->threshold = SWD_THRESHOLD;
+
+
+
+ s->max_chain = SWD_MAX_CHAIN;
+ s->nice_length = SWD_F;
+ s->use_best_off = 0;
+ s->lazy_insert = 0;
+
+ s->b_size = s->n + s->f;
+ if (2 * s->f >= s->n || s->b_size + s->f >= NIL2)
+ return LZO_E_ERROR;
+ s->b_wrap = s->b + s->b_size;
+ s->node_count = s->n;
+
+ memset (s->llen3, 0, sizeof (s->llen3[0]) * SWD_HSIZE);
+ memset (s->head2, 0xff, sizeof (s->head2[0]) * 65536L);
+
+ s->ip = 0;
+ swd_initdict (s, dict, dict_len);
+ s->bp = s->ip;
+ s->first_rp = s->ip;
+
+ s->look = (lzo_uint) (s->c->in_end - s->c->ip);
+ if (s->look > 0)
+ {
+ if (s->look > s->f)
+ s->look = s->f;
+ memcpy (&s->b[s->ip], s->c->ip, s->look);
+ s->c->ip += s->look;
+ s->ip += s->look;
+ }
+
+ if (s->ip == s->b_size)
+ s->ip = 0;
+
+ if (s->look >= 2 && s->dict_len > 0)
+ swd_insertdict (s, 0, s->dict_len);
+
+ s->rp = s->first_rp;
+ if (s->rp >= s->node_count)
+ s->rp -= s->node_count;
+ else
+ s->rp += s->b_size - s->node_count;
+
+ return LZO_E_OK;
+}
+
+static __inline__ void
+swd_remove_node (lzo1x_999_swd_t * s, lzo_uint node)
+{
+ if (s->node_count == 0)
+ {
+ lzo_uint key;
+
+ key = HEAD3 (s->b, node);
+
+ --s->llen3[key];
+
+ key = HEAD2 (s->b, node);
+
+ if ((lzo_uint) s->head2[key] == node)
+ s->head2[key] = NIL2;
+ }
+ else
+ --s->node_count;
+}
+
+static void
+swd_accept (lzo1x_999_swd_t * s, lzo_uint n)
+{
+
+ while (n--)
+ {
+ lzo_uint key;
+
+ swd_remove_node (s, s->rp);
+
+ key = HEAD3 (s->b, s->bp);
+ s->succ3[s->bp] = s_head3 (s, key);
+ s->head3[key] = SWD_UINT (s->bp);
+ s->best3[s->bp] = SWD_UINT (s->f + 1);
+ s->llen3[key]++;
+
+ key = HEAD2 (s->b, s->bp);
+ s->head2[key] = SWD_UINT (s->bp);;
+
+ swd_getbyte (s);
+ }
+}
+
+static void
+swd_search (lzo1x_999_swd_t * s, lzo_uint node, lzo_uint cnt)
+{
+ const unsigned char *p1;
+ const unsigned char *p2;
+ const unsigned char *px;
+
+ lzo_uint m_len = s->m_len;
+ const unsigned char *b = s->b;
+ const unsigned char *bp = s->b + s->bp;
+ const unsigned char *bx = s->b + s->bp + s->look;
+ unsigned char scan_end1;
+
+ scan_end1 = bp[m_len - 1];
+ for (; cnt-- > 0; node = s->succ3[node])
+ {
+ p1 = bp;
+ p2 = b + node;
+ px = bx;
+
+ if (p2[m_len - 1] == scan_end1 &&
+ p2[m_len] == p1[m_len] &&
+ p2[0] == p1[0] && p2[1] == p1[1])
+ {
+ lzo_uint i;
+
+ p1 += 2;
+ p2 += 2;
+ do
+ {
+ }
+ while (++p1 < px && *p1 == *++p2);
+
+ i = p1 - bp;
+
+ if (i < SWD_BEST_OFF)
+ {
+ if (s->best_pos[i] == 0)
+ s->best_pos[i] = node + 1;
+ }
+
+ if (i > m_len)
+ {
+ s->m_len = m_len = i;
+ s->m_pos = node;
+ if (m_len == s->look)
+ return;
+ if (m_len >= s->nice_length)
+ return;
+ if (m_len > (lzo_uint) s->best3[node])
+ return;
+ scan_end1 = bp[m_len - 1];
+ }
+ }
+ }
+}
+
+static lzo_bool
+swd_search2 (lzo1x_999_swd_t * s)
+{
+ lzo_uint key;
+
+ key = s->head2[HEAD2 (s->b, s->bp)];
+ if (key == NIL2)
+ return 0;
+
+ if (s->best_pos[2] == 0)
+ s->best_pos[2] = key + 1;
+
+ if (s->m_len < 2)
+ {
+ s->m_len = 2;
+ s->m_pos = key;
+ }
+ return 1;
+}
+
+static void
+swd_findbest (lzo1x_999_swd_t * s)
+{
+ lzo_uint key;
+ lzo_uint cnt, node;
+ lzo_uint len;
+
+ key = HEAD3 (s->b, s->bp);
+ node = s->succ3[s->bp] = s_head3 (s, key);
+ cnt = s->llen3[key]++;
+
+ if (cnt > s->max_chain && s->max_chain > 0)
+ cnt = s->max_chain;
+ s->head3[key] = SWD_UINT (s->bp);
+
+ s->b_char = s->b[s->bp];
+ len = s->m_len;
+ if (s->m_len >= s->look)
+ {
+ if (s->look == 0)
+ s->b_char = -1;
+ s->m_off = 0;
+ s->best3[s->bp] = SWD_UINT (s->f + 1);
+ }
+ else
+ {
+
+ if (swd_search2 (s))
+
+ if (s->look >= 3)
+ swd_search (s, node, cnt);
+ if (s->m_len > len)
+ s->m_off = swd_pos2off (s, s->m_pos);
+ s->best3[s->bp] = SWD_UINT (s->m_len);
+
+ if (s->use_best_off)
+ {
+ int i;
+ for (i = 2; i < SWD_BEST_OFF; i++)
+ if (s->best_pos[i] > 0)
+ s->best_off[i] =
+ swd_pos2off (s,
+ s->best_pos[i] -
+ 1);
+ else
+ s->best_off[i] = 0;
+ }
+
+ }
+
+ swd_remove_node (s, s->rp);
+
+ key = HEAD2 (s->b, s->bp);
+ s->head2[key] = SWD_UINT (s->bp);
+
+}
+
+/* lzo_mchw.ch */
+
+static int
+init_match (lzo1x_999_t * c, lzo1x_999_swd_t * s,
+ const lzo_byte * dict, lzo_uint dict_len, lzo_uint32 flags)
+{
+ int r;
+
+ c->init = 1;
+
+ s->c = c;
+
+ c->last_m_len = c->last_m_off = 0;
+
+ c->textsize = c->codesize = c->printcount = 0;
+ c->lit_bytes = c->match_bytes = c->rep_bytes = 0;
+ c->lazy = 0;
+
+ r = swd_init (s, dict, dict_len);
+ if (r != 0)
+ return r;
+
+ s->use_best_off = (flags & 1) ? 1 : 0;
+ return r;
+}
+
+static int
+find_match (lzo1x_999_t * c, lzo1x_999_swd_t * s,
+ lzo_uint this_len, lzo_uint skip)
+{
+ if (skip > 0)
+ {
+ swd_accept (s, this_len - skip);
+ c->textsize += this_len - skip + 1;
+ }
+ else
+ {
+ c->textsize += this_len - skip;
+ }
+
+ s->m_len = 1;
+ s->m_len = 1;
+
+ if (s->use_best_off)
+ memset (s->best_pos, 0, sizeof (s->best_pos));
+
+ swd_findbest (s);
+ c->m_len = s->m_len;
+ c->m_off = s->m_off;
+
+ swd_getbyte (s);
+
+ if (s->b_char < 0)
+ {
+ c->look = 0;
+ c->m_len = 0;
+ }
+ else
+ {
+ c->look = s->look + 1;
+ }
+ c->bp = c->ip - c->look;
+
+ if (c->cb && c->textsize > c->printcount)
+ {
+ (*c->cb) (c->textsize, c->codesize);
+ c->printcount += 1024;
+ }
+
+ return LZO_E_OK;
+}
+
+/* lzo1x_9x.c */
+
+static lzo_byte *
+code_match (lzo1x_999_t * c, lzo_byte * op, lzo_uint m_len, lzo_uint m_off)
+{
+ lzo_uint x_len = m_len;
+ lzo_uint x_off = m_off;
+
+ c->match_bytes += m_len;
+
+ if (m_len == 2)
+ {
+ m_off -= 1;
+
+ *op++ = LZO_BYTE (M1_MARKER | ((m_off & 3) << 2));
+ *op++ = LZO_BYTE (m_off >> 2);
+
+ c->m1a_m++;
+ }
+
+ else if (m_len <= M2_MAX_LEN && m_off <= M2_MAX_OFFSET)
+
+ {
+
+ m_off -= 1;
+ *op++ = LZO_BYTE (((m_len - 1) << 5) | ((m_off & 7) << 2));
+ *op++ = LZO_BYTE (m_off >> 3);
+ c->m2_m++;
+ }
+ else if (m_len == M2_MIN_LEN && m_off <= MX_MAX_OFFSET
+ && c->r1_lit >= 4)
+ {
+ m_off -= 1 + M2_MAX_OFFSET;
+
+ *op++ = LZO_BYTE (M1_MARKER | ((m_off & 3) << 2));
+ *op++ = LZO_BYTE (m_off >> 2);
+
+ c->m1b_m++;
+ }
+ else if (m_off <= M3_MAX_OFFSET)
+ {
+ m_off -= 1;
+ if (m_len <= M3_MAX_LEN)
+ *op++ = LZO_BYTE (M3_MARKER | (m_len - 2));
+ else
+ {
+ m_len -= M3_MAX_LEN;
+ *op++ = M3_MARKER | 0;
+ while (m_len > 255)
+ {
+ m_len -= 255;
+ *op++ = 0;
+ }
+ *op++ = LZO_BYTE (m_len);
+ }
+
+ *op++ = LZO_BYTE (m_off << 2);
+ *op++ = LZO_BYTE (m_off >> 6);
+
+ c->m3_m++;
+ }
+ else
+ {
+ lzo_uint k;
+
+ m_off -= 0x4000;
+ k = (m_off & 0x4000) >> 11;
+ if (m_len <= M4_MAX_LEN)
+ *op++ = LZO_BYTE (M4_MARKER | k | (m_len - 2));
+ else
+ {
+ m_len -= M4_MAX_LEN;
+ *op++ = LZO_BYTE (M4_MARKER | k | 0);
+ while (m_len > 255)
+ {
+ m_len -= 255;
+ *op++ = 0;
+ }
+ *op++ = LZO_BYTE (m_len);
+ }
+
+ *op++ = LZO_BYTE (m_off << 2);
+ *op++ = LZO_BYTE (m_off >> 6);
+
+ c->m4_m++;
+ }
+
+ c->last_m_len = x_len;
+ c->last_m_off = x_off;
+ return op;
+}
+
+static lzo_byte *
+STORE_RUN (lzo1x_999_t * c, lzo_byte * op, const lzo_byte * ii, lzo_uint t)
+{
+ c->lit_bytes += t;
+
+ if (op == c->out && t <= 238)
+ {
+ *op++ = LZO_BYTE (17 + t);
+ }
+ else if (t <= 3)
+ {
+ op[-2] |= LZO_BYTE (t);
+
+ c->lit1_r++;
+ }
+ else if (t <= 18)
+ {
+ *op++ = LZO_BYTE (t - 3);
+ c->lit2_r++;
+ }
+ else
+ {
+ lzo_uint tt = t - 18;
+
+ *op++ = 0;
+ while (tt > 255)
+ {
+ tt -= 255;
+ *op++ = 0;
+ }
+ *op++ = LZO_BYTE (tt);
+ c->lit3_r++;
+ }
+ do
+ *op++ = *ii++;
+ while (--t > 0);
+
+ return op;
+}
+
+static lzo_byte *
+code_run (lzo1x_999_t * c, lzo_byte * op, const lzo_byte * ii,
+ lzo_uint lit, lzo_uint m_len)
+{
+ if (lit > 0)
+ {
+ op = STORE_RUN (c, op, ii, lit);
+ c->r1_m_len = m_len;
+ c->r1_lit = lit;
+ }
+ else
+ {
+ c->r1_m_len = 0;
+ c->r1_lit = 0;
+ }
+
+ return op;
+}
+
+static int
+len_of_coded_match (lzo_uint m_len, lzo_uint m_off, lzo_uint lit)
+{
+ int n = 4;
+
+ if (m_len < 2)
+ return -1;
+ if (m_len == 2)
+ return (m_off <= M1_MAX_OFFSET && lit > 0
+ && lit < 4) ? 2 : -1;
+ if (m_len <= M2_MAX_LEN && m_off <= M2_MAX_OFFSET)
+ return 2;
+ if (m_len == M2_MIN_LEN && m_off <= MX_MAX_OFFSET && lit >= 4)
+ return 2;
+ if (m_off <= M3_MAX_OFFSET)
+ {
+ if (m_len <= M3_MAX_LEN)
+ return 3;
+ m_len -= M3_MAX_LEN;
+ while (m_len > 255)
+ {
+ m_len -= 255;
+ n++;
+ }
+ return n;
+ }
+ if (m_off <= M4_MAX_OFFSET)
+ {
+ if (m_len <= M4_MAX_LEN)
+ return 3;
+ m_len -= M4_MAX_LEN;
+ while (m_len > 255)
+ {
+ m_len -= 255;
+ n++;
+ }
+ return n;
+ }
+ return -1;
+}
+
+static lzo_int
+min_gain (lzo_uint ahead, lzo_uint lit1, lzo_uint lit2, int l1, int l2,
+ int l3)
+{
+ lzo_int lazy_match_min_gain = 0;
+
+ lazy_match_min_gain += ahead;
+
+ if (lit1 <= 3)
+ lazy_match_min_gain += (lit2 <= 3) ? 0 : 2;
+ else if (lit1 <= 18)
+ lazy_match_min_gain += (lit2 <= 18) ? 0 : 1;
+
+ lazy_match_min_gain += (l2 - l1) * 2;
+ if (l3 > 0)
+ lazy_match_min_gain -= (ahead - l3) * 2;
+
+ if (lazy_match_min_gain < 0)
+ lazy_match_min_gain = 0;
+
+ return lazy_match_min_gain;
+}
+
+static void
+better_match (const lzo1x_999_swd_t * swd, lzo_uint * m_len, lzo_uint * m_off)
+{
+ if (*m_len <= M2_MIN_LEN)
+ return;
+
+ if (*m_off <= M2_MAX_OFFSET)
+ return;
+
+ if (*m_off > M2_MAX_OFFSET &&
+ *m_len >= M2_MIN_LEN + 1 && *m_len <= M2_MAX_LEN + 1 &&
+ swd->best_off[*m_len - 1]
+ && swd->best_off[*m_len - 1] <= M2_MAX_OFFSET)
+ {
+ *m_len = *m_len - 1;
+ *m_off = swd->best_off[*m_len];
+ return;
+ }
+
+ if (*m_off > M3_MAX_OFFSET &&
+ *m_len >= M4_MAX_LEN + 1 && *m_len <= M2_MAX_LEN + 2 &&
+ swd->best_off[*m_len - 2]
+ && swd->best_off[*m_len - 2] <= M2_MAX_OFFSET)
+ {
+ *m_len = *m_len - 2;
+ *m_off = swd->best_off[*m_len];
+ return;
+ }
+
+ if (*m_off > M3_MAX_OFFSET &&
+ *m_len >= M4_MAX_LEN + 1 && *m_len <= M3_MAX_LEN + 1 &&
+ swd->best_off[*m_len - 1]
+ && swd->best_off[*m_len - 1] <= M3_MAX_OFFSET)
+ {
+ *m_len = *m_len - 1;
+ *m_off = swd->best_off[*m_len];
+ }
+
+}
+
+/* minilzo.c */
+
+static lzo_bool
+lzo_assert (int expr)
+{
+ return (expr) ? 1 : 0;
+}
+
+/* lzo1x_9x.c */
+
+static int
+lzo1x_999_compress_internal (const lzo_byte * in, lzo_uint in_len,
+ lzo_byte * out, lzo_uintp out_len,
+ lzo_voidp wrkmem,
+ const lzo_byte * dict, lzo_uint dict_len,
+ lzo_progress_callback_t cb,
+ int try_lazy,
+ lzo_uint good_length,
+ lzo_uint max_lazy,
+ lzo_uint nice_length,
+ lzo_uint max_chain, lzo_uint32 flags)
+{
+ lzo_byte *op;
+ const lzo_byte *ii;
+ lzo_uint lit;
+ lzo_uint m_len, m_off;
+ lzo1x_999_t cc;
+ lzo1x_999_t *const c = &cc;
+ lzo1x_999_swd_t *const swd = (lzo1x_999_swd_t *) wrkmem;
+ int r;
+
+ if (!lzo_assert
+ (LZO1X_999_MEM_COMPRESS >= lzo_sizeof (lzo1x_999_swd_t)))
+ return LZO_E_ERROR;
+
+ if (try_lazy < 0)
+ try_lazy = 1;
+
+ if (good_length <= 0)
+ good_length = 32;
+
+ if (max_lazy <= 0)
+ max_lazy = 32;
+
+ if (nice_length <= 0)
+ nice_length = 0;
+
+ if (max_chain <= 0)
+ max_chain = SWD_MAX_CHAIN;
+
+ c->init = 0;
+ c->ip = c->in = in;
+ c->in_end = in + in_len;
+ c->out = out;
+ c->cb = cb;
+ c->m1a_m = c->m1b_m = c->m2_m = c->m3_m = c->m4_m = 0;
+ c->lit1_r = c->lit2_r = c->lit3_r = 0;
+
+ op = out;
+ ii = c->ip;
+ lit = 0;
+ c->r1_lit = c->r1_m_len = 0;
+
+ r = init_match (c, swd, dict, dict_len, flags);
+ if (r != 0)
+ return r;
+ if (max_chain > 0)
+ swd->max_chain = max_chain;
+ if (nice_length > 0)
+ swd->nice_length = nice_length;
+
+ r = find_match (c, swd, 0, 0);
+ if (r != 0)
+ return r;
+ while (c->look > 0)
+ {
+ lzo_uint ahead;
+ lzo_uint max_ahead;
+ int l1, l2, l3;
+
+ c->codesize = op - out;
+
+ m_len = c->m_len;
+ m_off = c->m_off;
+
+ if (lit == 0)
+ ii = c->bp;
+
+ if (m_len < 2 ||
+ (m_len == 2
+ && (m_off > M1_MAX_OFFSET || lit == 0 || lit >= 4))
+ || (m_len == 2 && op == out) || (op == out && lit == 0))
+ {
+
+ m_len = 0;
+ }
+ else if (m_len == M2_MIN_LEN)
+ {
+
+ if (m_off > MX_MAX_OFFSET && lit >= 4)
+ m_len = 0;
+ }
+
+ if (m_len == 0)
+ {
+
+ lit++;
+ swd->max_chain = max_chain;
+ r = find_match (c, swd, 1, 0);
+ continue;
+ }
+
+ if (swd->use_best_off)
+ better_match (swd, &m_len, &m_off);
+
+ ahead = 0;
+ if (try_lazy <= 0 || m_len >= max_lazy)
+ {
+
+ l1 = 0;
+ max_ahead = 0;
+ }
+ else
+ {
+
+ l1 = len_of_coded_match (m_len, m_off, lit);
+
+ max_ahead = LZO_MIN (try_lazy, l1 - 1);
+
+ }
+
+ while (ahead < max_ahead && c->look > m_len)
+ {
+ lzo_int lazy_match_min_gain;
+
+ if (m_len >= good_length)
+ swd->max_chain = max_chain >> 2;
+ else
+ swd->max_chain = max_chain;
+ r = find_match (c, swd, 1, 0);
+ ahead++;
+
+ if (c->m_len < m_len)
+ continue;
+
+ if (c->m_len == m_len && c->m_off >= m_off)
+ continue;
+
+ if (swd->use_best_off)
+ better_match (swd, &c->m_len, &c->m_off);
+
+ l2 = len_of_coded_match (c->m_len, c->m_off,
+ lit + ahead);
+ if (l2 < 0)
+ continue;
+
+ l3 = (op == out) ? -1 : len_of_coded_match (ahead,
+ m_off,
+ lit);
+
+ lazy_match_min_gain =
+ min_gain (ahead, lit, lit + ahead, l1, l2,
+ l3);
+ if (c->m_len >= m_len + lazy_match_min_gain)
+ {
+ c->lazy++;
+
+ if (l3 > 0)
+ {
+
+ op = code_run (c, op, ii, lit, ahead);
+ lit = 0;
+
+ op = code_match (c, op, ahead, m_off);
+ }
+ else
+ {
+ lit += ahead;
+ }
+ goto lazy_match_done;
+ }
+ }
+
+ op = code_run (c, op, ii, lit, m_len);
+ lit = 0;
+
+ op = code_match (c, op, m_len, m_off);
+ swd->max_chain = max_chain;
+ r = find_match (c, swd, m_len, 1 + ahead);
+
+ lazy_match_done:;
+ }
+
+ if (lit > 0)
+ op = STORE_RUN (c, op, ii, lit);
+
+ *op++ = M4_MARKER | 1;
+ *op++ = 0;
+ *op++ = 0;
+
+ c->codesize = op - out;
+
+ *out_len = op - out;
+
+ if (c->cb)
+ (*c->cb) (c->textsize, c->codesize);
+
+ return LZO_E_OK;
+}
+
+static int
+lzo1x_999_compress_level (const lzo_byte * in, lzo_uint in_len,
+ lzo_byte * out, lzo_uintp out_len,
+ lzo_voidp wrkmem,
+ const lzo_byte * dict, lzo_uint dict_len,
+ lzo_progress_callback_t cb, int compression_level)
+{
+ static const struct
+ {
+ int try_lazy;
+ lzo_uint good_length;
+ lzo_uint max_lazy;
+ lzo_uint nice_length;
+ lzo_uint max_chain;
+ lzo_uint32 flags;
+ } c[9] =
+ {
+ {
+ 0, 0, 0, 8, 4, 0},
+ {
+ 0, 0, 0, 16, 8, 0},
+ {
+ 0, 0, 0, 32, 16, 0},
+ {
+ 1, 4, 4, 16, 16, 0},
+ {
+ 1, 8, 16, 32, 32, 0},
+ {
+ 1, 8, 16, 128, 128, 0},
+ {
+ 2, 8, 32, 128, 256, 0},
+ {
+ 2, 32, 128, F, 2048, 1},
+ {
+ 2, F, F, F, 4096, 1}
+ };
+
+ if (compression_level < 1 || compression_level > 9)
+ return LZO_E_ERROR;
+
+ compression_level -= 1;
+ return lzo1x_999_compress_internal (in, in_len, out, out_len, wrkmem,
+ dict, dict_len, cb,
+ c[compression_level].try_lazy,
+ c[compression_level].good_length,
+ c[compression_level].max_lazy,
+ 0,
+ c[compression_level].max_chain,
+ c[compression_level].flags);
+}
+
+static int
+lzo1x_999_compress (const lzo_byte * in, lzo_uint in_len,
+ lzo_byte * out, lzo_uintp out_len, lzo_voidp wrkmem)
+{
+ return lzo1x_999_compress_level (in, in_len, out, out_len, wrkmem,
+ NULL, 0, 0, 8);
+}
+
+/* minilzo.c */
+
+static const lzo_byte __lzo_copyright[] = LZO_VERSION_STRING;
+
+static lzo_uint
+_lzo1x_1_do_compress (const lzo_byte * in, lzo_uint in_len,
+ lzo_byte * out, lzo_uintp out_len, lzo_voidp wrkmem)
+{
+
+ register const lzo_byte *ip;
+
+ lzo_byte *op;
+ const lzo_byte *const in_end = in + in_len;
+ const lzo_byte *const ip_end = in + in_len - 8 - 5;
+ const lzo_byte *ii;
+ lzo_dict_p const dict = (lzo_dict_p) wrkmem;
+
+ op = out;
+ ip = in;
+ ii = ip;
+
+ ip += 4;
+ for (;;)
+ {
+ register const lzo_byte *m_pos;
+
+ lzo_uint m_off;
+ lzo_uint m_len;
+ lzo_uint dindex;
+
+ DINDEX1 (dindex, ip);
+ GINDEX (m_pos, m_off, dict, dindex, in);
+ if (LZO_CHECK_MPOS_NON_DET
+ (m_pos, m_off, in, ip, M4_MAX_OFFSET))
+ goto literal;
+
+ if (m_off <= M2_MAX_OFFSET || m_pos[3] == ip[3])
+ goto try_match;
+ DINDEX2 (dindex, ip);
+ GINDEX (m_pos, m_off, dict, dindex, in);
+
+ if (LZO_CHECK_MPOS_NON_DET
+ (m_pos, m_off, in, ip, M4_MAX_OFFSET))
+ goto literal;
+ if (m_off <= M2_MAX_OFFSET || m_pos[3] == ip[3])
+ goto try_match;
+ goto literal;
+
+ try_match:
+ if (m_pos[0] != ip[0] || m_pos[1] != ip[1])
+ {
+ }
+ else
+ {
+ if (m_pos[2] == ip[2])
+ {
+ goto match;
+ }
+ else
+ {
+ }
+ }
+
+ literal:
+ UPDATE_I (dict, 0, dindex, ip, in);
+ ++ip;
+ if (ip >= ip_end)
+ break;
+ continue;
+
+ match:
+ UPDATE_I (dict, 0, dindex, ip, in);
+
+ if (pd (ip, ii) > 0)
+ {
+ register lzo_uint t = pd (ip, ii);
+
+ if (t <= 3)
+ {
+ op[-2] |= LZO_BYTE (t);
+ }
+ else if (t <= 18)
+ *op++ = LZO_BYTE (t - 3);
+ else
+ {
+ register lzo_uint tt = t - 18;
+
+ *op++ = 0;
+ while (tt > 255)
+ {
+ tt -= 255;
+ *op++ = 0;
+ }
+ *op++ = LZO_BYTE (tt);;
+ }
+ do
+ *op++ = *ii++;
+ while (--t > 0);
+ }
+
+ ip += 3;
+ if (m_pos[3] != *ip++ || m_pos[4] != *ip++
+ || m_pos[5] != *ip++ || m_pos[6] != *ip++
+ || m_pos[7] != *ip++ || m_pos[8] != *ip++)
+ {
+ --ip;
+ m_len = ip - ii;
+
+ if (m_off <= M2_MAX_OFFSET)
+ {
+ m_off -= 1;
+
+ *op++ = LZO_BYTE (((m_len -
+ 1) << 5) | ((m_off & 7) <<
+ 2));
+ *op++ = LZO_BYTE (m_off >> 3);
+ }
+ else if (m_off <= M3_MAX_OFFSET)
+ {
+ m_off -= 1;
+ *op++ = LZO_BYTE (M3_MARKER | (m_len - 2));
+ goto m3_m4_offset;
+ }
+ else
+
+ {
+ m_off -= 0x4000;
+
+ *op++ = LZO_BYTE (M4_MARKER |
+ ((m_off & 0x4000) >> 11) |
+ (m_len - 2));
+ goto m3_m4_offset;
+ }
+ }
+ else
+ {
+ {
+ const lzo_byte *end = in_end;
+ const lzo_byte *m = m_pos + M2_MAX_LEN + 1;
+ while (ip < end && *m == *ip)
+ m++, ip++;
+ m_len = (ip - ii);
+ }
+
+
+ if (m_off <= M3_MAX_OFFSET)
+ {
+ m_off -= 1;
+ if (m_len <= 33)
+ *op++ = LZO_BYTE (M3_MARKER |
+ (m_len - 2));
+ else
+ {
+ m_len -= 33;
+ *op++ = M3_MARKER | 0;
+ goto m3_m4_len;
+ }
+ }
+ else
+ {
+ m_off -= 0x4000;
+
+ if (m_len <= M4_MAX_LEN)
+ *op++ = LZO_BYTE (M4_MARKER |
+ ((m_off & 0x4000) >>
+ 11) | (m_len - 2));
+
+ else
+ {
+ m_len -= M4_MAX_LEN;
+ *op++ = LZO_BYTE (M4_MARKER |
+ ((m_off & 0x4000) >>
+ 11));
+ m3_m4_len:
+ while (m_len > 255)
+ {
+ m_len -= 255;
+ *op++ = 0;
+ }
+
+ *op++ = LZO_BYTE (m_len);
+ }
+ }
+
+ m3_m4_offset:
+ *op++ = LZO_BYTE ((m_off & 63) << 2);
+ *op++ = LZO_BYTE (m_off >> 6);
+ }
+ ii = ip;
+ if (ip >= ip_end)
+ break;
+ }
+
+ *out_len = op - out;
+ return pd (in_end, ii);
+}
+
+static int
+lzo1x_1_compress (const lzo_byte * in, lzo_uint in_len,
+ lzo_byte * out, lzo_uintp out_len, lzo_voidp wrkmem)
+{
+ lzo_byte *op = out;
+ lzo_uint t;
+
+ if (in_len <= M2_MAX_LEN + 5)
+ t = in_len;
+ else
+ {
+ t = _lzo1x_1_do_compress (in, in_len, op, out_len, wrkmem);
+ op += *out_len;
+ }
+
+ if (t > 0)
+ {
+ const lzo_byte *ii = in + in_len - t;
+
+ if (op == out && t <= 238)
+ *op++ = LZO_BYTE (17 + t);
+ else if (t <= 3)
+ op[-2] |= LZO_BYTE (t);
+ else if (t <= 18)
+ *op++ = LZO_BYTE (t - 3);
+ else
+ {
+ lzo_uint tt = t - 18;
+
+ *op++ = 0;
+ while (tt > 255)
+ {
+ tt -= 255;
+ *op++ = 0;
+ }
+
+ *op++ = LZO_BYTE (tt);
+ }
+ do
+ *op++ = *ii++;
+ while (--t > 0);
+ }
+
+ *op++ = M4_MARKER | 1;
+ *op++ = 0;
+ *op++ = 0;
+
+ *out_len = op - out;
+ return 0;
+}
+
+static int
+lzo1x_decompress (const lzo_byte * in, lzo_uint in_len,
+ lzo_byte * out, lzo_uintp out_len, lzo_voidp wrkmem)
+{
+ register lzo_byte *op;
+ register const lzo_byte *ip;
+ register lzo_uint t;
+
+ register const lzo_byte *m_pos;
+
+ const lzo_byte *const ip_end = in + in_len;
+ lzo_byte *const op_end = out + *out_len;
+
+ *out_len = 0;
+
+ op = out;
+ ip = in;
+
+ if (*ip > 17)
+ {
+ t = *ip++ - 17;
+ if (t < 4)
+ goto match_next;
+ NEED_OP (t);
+ NEED_IP (t + 1);
+ do
+ *op++ = *ip++;
+ while (--t > 0);
+ goto first_literal_run;
+ }
+
+ while (TEST_IP && TEST_OP)
+ {
+ t = *ip++;
+ if (t >= 16)
+ goto match;
+ if (t == 0)
+ {
+ NEED_IP (1);
+ while (*ip == 0)
+ {
+ t += 255;
+ ip++;
+ NEED_IP (1);
+ }
+ t += 15 + *ip++;
+ }
+ NEED_OP (t + 3);
+ NEED_IP (t + 4);
+ if (PTR_ALIGNED2_4 (op, ip))
+ {
+ COPY4 (op, ip);
+
+ op += 4;
+ ip += 4;
+ if (--t > 0)
+ {
+ if (t >= 4)
+ {
+ do
+ {
+ COPY4 (op, ip);
+ op += 4;
+ ip += 4;
+ t -= 4;
+ }
+ while (t >= 4);
+ if (t > 0)
+ do
+ *op++ = *ip++;
+ while (--t > 0);
+ }
+ else
+ do
+ *op++ = *ip++;
+ while (--t > 0);
+ }
+ }
+ else
+ {
+ *op++ = *ip++;
+ *op++ = *ip++;
+ *op++ = *ip++;
+ do
+ *op++ = *ip++;
+ while (--t > 0);
+ }
+ first_literal_run:
+
+ t = *ip++;
+ if (t >= 16)
+ goto match;
+
+ m_pos = op - (1 + M2_MAX_OFFSET);
+ m_pos -= t >> 2;
+ m_pos -= *ip++ << 2;
+ TEST_LOOKBEHIND (m_pos, out);
+ NEED_OP (3);
+ *op++ = *m_pos++;
+ *op++ = *m_pos++;
+ *op++ = *m_pos;
+
+ goto match_done;
+
+ while (TEST_IP && TEST_OP)
+ {
+ match:
+ if (t >= 64)
+ {
+ m_pos = op - 1;
+ m_pos -= (t >> 2) & 7;
+ m_pos -= *ip++ << 3;
+ t = (t >> 5) - 1;
+ TEST_LOOKBEHIND (m_pos, out);
+ NEED_OP (t + 3 - 1);
+ goto copy_match;
+
+ }
+ else if (t >= 32)
+ {
+ t &= 31;
+ if (t == 0)
+ {
+ NEED_IP (1);
+ while (*ip == 0)
+ {
+ t += 255;
+ ip++;
+ NEED_IP (1);
+ }
+ t += 31 + *ip++;
+ }
+
+ m_pos = op - 1;
+ m_pos -= (ip[0] >> 2) + (ip[1] << 6);
+
+ ip += 2;
+ }
+ else if (t >= 16)
+ {
+ m_pos = op;
+ m_pos -= (t & 8) << 11;
+
+ t &= 7;
+ if (t == 0)
+ {
+ NEED_IP (1);
+ while (*ip == 0)
+ {
+ t += 255;
+ ip++;
+ NEED_IP (1);
+ }
+ t += 7 + *ip++;
+ }
+
+ m_pos -= (ip[0] >> 2) + (ip[1] << 6);
+
+ ip += 2;
+ if (m_pos == op)
+ goto eof_found;
+ m_pos -= 0x4000;
+ }
+ else
+ {
+
+ m_pos = op - 1;
+ m_pos -= t >> 2;
+ m_pos -= *ip++ << 2;
+ TEST_LOOKBEHIND (m_pos, out);
+ NEED_OP (2);
+ *op++ = *m_pos++;
+ *op++ = *m_pos;
+
+ goto match_done;
+ }
+
+ TEST_LOOKBEHIND (m_pos, out);
+ NEED_OP (t + 3 - 1);
+ if (t >= 2 * 4 - (3 - 1)
+ && PTR_ALIGNED2_4 (op, m_pos))
+ {
+ COPY4 (op, m_pos);
+ op += 4;
+ m_pos += 4;
+ t -= 4 - (3 - 1);
+ do
+ {
+ COPY4 (op, m_pos);
+ op += 4;
+ m_pos += 4;
+ t -= 4;
+ }
+ while (t >= 4);
+ if (t > 0)
+ do
+ *op++ = *m_pos++;
+ while (--t > 0);
+ }
+ else
+
+ {
+ copy_match:
+ *op++ = *m_pos++;
+ *op++ = *m_pos++;
+ do
+ *op++ = *m_pos++;
+ while (--t > 0);
+ }
+
+ match_done:
+ t = ip[-2] & 3;
+
+ if (t == 0)
+ break;
+
+ match_next:
+ NEED_OP (t);
+ NEED_IP (t + 1);
+ do
+ *op++ = *ip++;
+ while (--t > 0);
+ t = *ip++;
+ }
+ }
+ *out_len = op - out;
+ return LZO_E_EOF_NOT_FOUND;
+
+ eof_found:
+ *out_len = op - out;
+ return (ip == ip_end ? LZO_E_OK :
+ (ip <
+ ip_end ? LZO_E_INPUT_NOT_CONSUMED : LZO_E_INPUT_OVERRUN));
+
+ input_overrun:
+ *out_len = op - out;
+ return LZO_E_INPUT_OVERRUN;
+
+ output_overrun:
+ *out_len = op - out;
+ return LZO_E_OUTPUT_OVERRUN;
+
+ lookbehind_overrun:
+ *out_len = op - out;
+ return LZO_E_LOOKBEHIND_OVERRUN;
+}
+
+/* lzo1x_oo.ch */
+
+#define NO_LIT LZO_UINT_MAX
+
+static void
+copy2 (lzo_byte * ip, const lzo_byte * m_pos, lzo_ptrdiff_t off)
+{
+ ip[0] = m_pos[0];
+ if (off == 1)
+ ip[1] = m_pos[0];
+ else
+ ip[1] = m_pos[1];
+}
+
+static void
+copy3 (lzo_byte * ip, const lzo_byte * m_pos, lzo_ptrdiff_t off)
+{
+ ip[0] = m_pos[0];
+ if (off == 1)
+ {
+ ip[2] = ip[1] = m_pos[0];
+ }
+ else if (off == 2)
+ {
+ ip[1] = m_pos[1];
+ ip[2] = m_pos[0];
+ }
+ else
+ {
+ ip[1] = m_pos[1];
+ ip[2] = m_pos[2];
+ }
+}
+
+static int
+lzo1x_optimize (lzo_byte * in, lzo_uint in_len,
+ lzo_byte * out, lzo_uintp out_len, lzo_voidp wrkmem)
+{
+ register lzo_byte *op;
+ register lzo_byte *ip;
+ register lzo_uint t;
+ register lzo_byte *m_pos;
+ lzo_uint nl;
+ const lzo_byte *const ip_end = in + in_len;
+ const lzo_byte *const op_end = out + *out_len;
+ lzo_byte *litp = NULL;
+ lzo_uint lit = 0;
+ lzo_uint next_lit = NO_LIT;
+ long o_m1_a = 0, o_m1_b = 0, o_m2 = 0, o_m3_a = 0, o_m3_b = 0;
+
+ *out_len = 0;
+
+ op = out;
+ ip = in;
+
+ if (*ip > 17)
+ {
+ t = *ip++ - 17;
+ if (t < 4)
+ goto match_next;
+ goto first_literal_run;
+ }
+
+ while (TEST_IP && TEST_OP)
+ {
+ t = *ip++;
+ if (t >= 16)
+ goto match;
+ litp = ip - 1;
+ if (t == 0)
+ {
+ t = 15;
+ while (*ip == 0)
+ t += 255, ip++;
+ t += *ip++;
+ }
+ lit = t + 3;
+ copy_literal_run:
+ *op++ = *ip++;
+ *op++ = *ip++;
+ *op++ = *ip++;
+ first_literal_run:
+ do
+ *op++ = *ip++;
+ while (--t > 0);
+
+ t = *ip++;
+
+ if (t >= 16)
+ goto match;
+ m_pos = op - 1 - 0x800;
+ m_pos -= t >> 2;
+ m_pos -= *ip++ << 2;
+ *op++ = *m_pos++;
+ *op++ = *m_pos++;
+ *op++ = *m_pos++;
+ lit = 0;
+ goto match_done;
+
+ while (TEST_IP && TEST_OP)
+ {
+ if (t < 16)
+ {
+ m_pos = op - 1;
+ m_pos -= t >> 2;
+ m_pos -= *ip++ << 2;
+
+ if (litp == NULL)
+ goto copy_m1;
+
+ nl = ip[-2] & 3;
+ if (nl == 0 && lit == 1 && ip[0] >= 16)
+ {
+ next_lit = nl;
+ lit += 2;
+ *litp = LZO_BYTE ((*litp & ~3) | lit);
+ copy2 (ip - 2, m_pos, op - m_pos);
+ o_m1_a++;
+ }
+ else if (nl == 0 && ip[0] < 16 && ip[0] != 0
+ && (lit + 2 + ip[0] < 16))
+ {
+ t = *ip++;
+ *litp &= ~3;
+ copy2 (ip - 3 + 1, m_pos, op - m_pos);
+ litp += 2;
+ if (lit > 0)
+ memmove (litp + 1, litp, lit);
+ lit += 2 + t + 3;
+ *litp = LZO_BYTE (lit - 3);
+
+ o_m1_b++;
+ *op++ = *m_pos++;
+ *op++ = *m_pos++;
+ goto copy_literal_run;
+ }
+ copy_m1:
+ *op++ = *m_pos++;
+ *op++ = *m_pos++;
+ }
+ else
+ {
+ match:
+ if (t >= 64)
+ {
+ m_pos = op - 1;
+ m_pos -= (t >> 2) & 7;
+ m_pos -= *ip++ << 3;
+ t = (t >> 5) - 1;
+ if (litp == NULL)
+ goto copy_m;
+
+ nl = ip[-2] & 3;
+ if (t == 1 && lit > 3 && nl == 0 &&
+ ip[0] < 16 && ip[0] != 0
+ && (lit + 3 + ip[0] < 16))
+ {
+ t = *ip++;
+ copy3 (ip - 1 - 2, m_pos,
+ op - m_pos);
+ lit += 3 + t + 3;
+ *litp = LZO_BYTE (lit - 3);
+ o_m2++;
+ *op++ = *m_pos++;
+ *op++ = *m_pos++;
+ *op++ = *m_pos++;
+ goto copy_literal_run;
+ }
+ }
+ else
+ {
+ if (t >= 32)
+ {
+ t &= 31;
+ if (t == 0)
+ {
+ t = 31;
+ while (*ip == 0)
+ t += 255,
+ ip++;
+ t += *ip++;
+ }
+ m_pos = op - 1;
+ m_pos -= *ip++ >> 2;
+ m_pos -= *ip++ << 6;
+ }
+ else
+ {
+ m_pos = op;
+ m_pos -= (t & 8) << 11;
+ t &= 7;
+ if (t == 0)
+ {
+ t = 7;
+ while (*ip == 0)
+ t += 255,
+ ip++;
+ t += *ip++;
+ }
+ m_pos -= *ip++ >> 2;
+ m_pos -= *ip++ << 6;
+ if (m_pos == op)
+ goto eof_found;
+ m_pos -= 0x4000;
+ }
+ if (litp == NULL)
+ goto copy_m;
+
+ nl = ip[-2] & 3;
+ if (t == 1 && lit == 0 && nl == 0
+ && ip[0] >= 16)
+ {
+ next_lit = nl;
+ lit += 3;
+ *litp = LZO_BYTE ((*litp & ~3)
+ | lit);
+ copy3 (ip - 3, m_pos,
+ op - m_pos);
+ o_m3_a++;
+ }
+ else if (t == 1 && lit <= 3 && nl == 0
+ && ip[0] < 16 && ip[0] != 0
+ && (lit + 3 + ip[0] < 16))
+ {
+ t = *ip++;
+ *litp &= ~3;
+ copy3 (ip - 4 + 1, m_pos,
+ op - m_pos);
+ litp += 2;
+ if (lit > 0)
+ memmove (litp + 1,
+ litp, lit);
+ lit += 3 + t + 3;
+ *litp = LZO_BYTE (lit - 3);
+
+ o_m3_b++;
+ *op++ = *m_pos++;
+ *op++ = *m_pos++;
+ *op++ = *m_pos++;
+ goto copy_literal_run;
+ }
+ }
+ copy_m:
+ *op++ = *m_pos++;
+ *op++ = *m_pos++;
+ do
+ *op++ = *m_pos++;
+ while (--t > 0);
+ }
+
+ match_done:
+ if (next_lit == NO_LIT)
+ {
+ t = ip[-2] & 3;
+ lit = t;
+ litp = ip - 2;
+ }
+ else
+ t = next_lit;
+ next_lit = NO_LIT;
+ if (t == 0)
+ break;
+ match_next:
+ do
+ *op++ = *ip++;
+ while (--t > 0);
+ t = *ip++;
+ }
+ }
+
+ *out_len = op - out;
+ return LZO_E_EOF_NOT_FOUND;
+
+ eof_found:
+ *out_len = op - out;
+ return (ip == ip_end ? LZO_E_OK :
+ (ip <
+ ip_end ? LZO_E_INPUT_NOT_CONSUMED : LZO_E_INPUT_OVERRUN));
+}
+
+/* interface to jffs2 bbc follows */
+
+#include "jffs2_bbc_framework.h"
+
+#define BLOCKSIZE 4096
+#define OUTBLOCKSIZE (BLOCKSIZE + BLOCKSIZE / 64 + 16 + 3)
+
+#define JFFS2_BBC_LZO_BLOCK_SIGN {0x3f, 0x47, 0x5a, 0x18}
+
+static int
+jffs2_bbc_lzo_compressor_init (void);
+
+static void
+jffs2_bbc_lzo_compressor_deinit (void);
+
+static int
+jffs2_bbc_lzo_compress (void *model, unsigned char *input,
+ unsigned char *output, unsigned long *sourcelen,
+ unsigned long *dstlen);
+
+static int
+jffs2_bbc_lzo_estimate (void *model, unsigned char *input,
+ unsigned long sourcelen, unsigned long *dstlen,
+ unsigned long *readtime, unsigned long *writetime);
+
+static int
+jffs2_bbc_lzo_decompress (void *model, unsigned char *input,
+ unsigned char *output, unsigned long sourcelen,
+ unsigned long dstlen);
+
+static char *
+jffs2_bbc_lzo_proc_info (void);
+
+static int
+jffs2_bbc_lzo_proc_command (char *command);
+
+struct jffs2_bbc_compressor_type jffs2_bbc_lzo = {
+ "lzo",
+ 0,
+ JFFS2_BBC_LZO_BLOCK_SIGN,
+ jffs2_bbc_lzo_compressor_init,
+ NULL,
+ NULL,
+ jffs2_bbc_lzo_compressor_deinit,
+ jffs2_bbc_lzo_compress,
+ jffs2_bbc_lzo_estimate,
+ jffs2_bbc_lzo_decompress,
+ jffs2_bbc_lzo_proc_info,
+ jffs2_bbc_lzo_proc_command
+};
+
+static int
+no_lzo1x_optimize (lzo_byte * src, lzo_uint src_len,
+ lzo_byte * dst, lzo_uintp dst_len, lzo_voidp wrkmem)
+{
+ return 0;
+}
+
+#ifdef __KERNEL__
+static lzo_compress_t lzo1x_compressor = lzo1x_1_compress;
+static lzo_optimize_t lzo1x_optimizer = no_lzo1x_optimize;
+static int lzo1x_compressor_type = 1;
+static int lzo1x_optimize_type = 0;
+static unsigned long lzo1x_compressor_memsize = LZO1X_1_MEM_COMPRESS;
+#else
+static lzo_compress_t lzo1x_compressor = lzo1x_999_compress;
+static lzo_optimize_t lzo1x_optimizer = lzo1x_optimize;
+static int lzo1x_compressor_type = 999;
+static int lzo1x_optimize_type = 1;
+static unsigned long lzo1x_compressor_memsize = LZO1X_999_MEM_COMPRESS;
+#endif
+
+static lzo_bytep wrkmem = NULL; /* temporary buffer for compression, used by lzo */
+static lzo_bytep cmprssmem = NULL; /* temporary buffer for compression, used by interface */
+
+static int
+jffs2_bbc_lzo_compressor_init (void)
+{
+ wrkmem = (lzo_bytep) jffs2_bbc_malloc (lzo1x_compressor_memsize);
+ cmprssmem = (lzo_bytep) jffs2_bbc_malloc (OUTBLOCKSIZE);
+ return !(wrkmem && cmprssmem);
+}
+
+static void
+jffs2_bbc_lzo_compressor_deinit (void)
+{
+ jffs2_bbc_free (wrkmem);
+ jffs2_bbc_free (cmprssmem);
+}
+
+static int
+jffs2_bbc_lzo_compress (void *model, unsigned char *input,
+ unsigned char *output, unsigned long *sourcelen,
+ unsigned long *dstlen)
+{
+ lzo_uint csize = OUTBLOCKSIZE;
+ lzo_uint isize = *sourcelen;
+ int retval;
+ if ((retval =
+ lzo1x_compressor (input, *sourcelen, cmprssmem, &csize,
+ wrkmem)) != LZO_E_OK)
+ {
+ *sourcelen = *dstlen = 0;
+ return retval;
+ }
+ else
+ {
+ retval = lzo1x_optimizer (cmprssmem, csize, input, &isize,
+ NULL);
+ csize += 2;
+ if (csize <= *dstlen) {
+ *dstlen = csize;
+ *(output++) = jffs2_bbc_lzo.block_sign[0];
+ *(output++) = jffs2_bbc_lzo.block_sign[1];
+ memcpy (output, cmprssmem, csize - 2);
+ return retval;
+ } else {
+ *sourcelen = *dstlen = 0;
+ return -1;
+ }
+ }
+}
+
+static int
+jffs2_bbc_lzo_estimate (void *model, unsigned char *input,
+ unsigned long sourcelen, unsigned long *dstlen,
+ unsigned long *readtime, unsigned long *writetime)
+{
+ *dstlen = sourcelen * 55 / 100;
+ *readtime = JFFS2_BBC_ZLIB_READ_TIME / 2;
+ *writetime = JFFS2_BBC_ZLIB_WRITE_TIME * 8 / 10; /* LZO1X-1 is much-much faster,
+ but LZO1X-999 is slow. The default mode for inside kernel compression is LZO1X-1
+ This should be *0.4 really */
+ return 0;
+}
+
+static int
+jffs2_bbc_lzo_decompress (void *model, unsigned char *input,
+ unsigned char *output, unsigned long sourcelen,
+ unsigned long dstlen)
+{
+ lzo_uint outlen = dstlen;
+ if ( ( *(input++) != (unsigned char)jffs2_bbc_lzo.block_sign[0] ) ||
+ ( *(input++) != (unsigned char)jffs2_bbc_lzo.block_sign[1] )
+ ) {
+ return -1;
+ } else {
+ return lzo1x_decompress (input, sourcelen - 2, output, &outlen, NULL);
+ }
+}
+
+static char *
+jffs2_bbc_lzo_proc_info (void)
+{
+ if (lzo1x_compressor_type == 1)
+ {
+ if (lzo1x_optimize_type == 1)
+ {
+ return "LZO1X-1 compression with optimization";
+ }
+ else
+ {
+ return "LZO1X-1 compression without optimization";
+ }
+ }
+ else if (lzo1x_compressor_type == 999)
+ {
+ if (lzo1x_optimize_type == 1)
+ {
+ return "LZO1X-999 compression with optimization";
+ }
+ else
+ {
+ return "LZO1X-999 compression without optimization";
+ }
+ }
+ else
+ {
+ return "Unknown configuration!";
+ }
+}
+
+static int
+jffs2_bbc_lzo_proc_command (char *command)
+{
+ switch (*command)
+ {
+ case 'o':
+ /* switch optimization off */
+ lzo1x_optimizer = no_lzo1x_optimize;
+ lzo1x_optimize_type = 0;
+ jffs2_bbc_print1 ("Compression optimization switched off.\n");
+ return 0;
+ case 'O':
+ /* switch optimization on */
+ lzo1x_optimizer = lzo1x_optimize;
+ lzo1x_optimize_type = 1;
+ jffs2_bbc_print1 ("Compression optimization switched on.\n");
+ return 0;
+ case '1':
+ /* switch compression to LZO1X-1 */
+ jffs2_bbc_free (wrkmem);
+ lzo1x_compressor_type = 1;
+ lzo1x_compressor = lzo1x_1_compress;
+ lzo1x_compressor_memsize = LZO1X_1_MEM_COMPRESS;
+ wrkmem = (lzo_bytep)
+ jffs2_bbc_malloc (lzo1x_compressor_memsize);
+ jffs2_bbc_print1 ("Compression type switched to LZO1X-1.\n");
+ return 0;
+ case '9':
+ /* switch compression to LZO1X-999 */
+ jffs2_bbc_free (wrkmem);
+ lzo1x_compressor_type = 999;
+ lzo1x_compressor = lzo1x_999_compress;
+ lzo1x_compressor_memsize = LZO1X_999_MEM_COMPRESS;
+ wrkmem = (lzo_bytep)
+ jffs2_bbc_malloc (lzo1x_compressor_memsize);
+ jffs2_bbc_print1
+ ("Compression type switched to LZO1X-999.\n");
+ return 0;
+ default:
+ jffs2_bbc_print1 ("Unknown command!\n");
+ return 0;
+ }
+}
+
+
+struct jffs2_bbc_compressor_type *
+jffs2_bbc_lzo_init (int mode)
+{
+ if (jffs2_bbc_register_compressor (&jffs2_bbc_lzo) == 0)
+ {
+ return &jffs2_bbc_lzo;
+ }
+ else
+ {
+ return NULL;
+ }
+}
+
+void
+jffs2_bbc_lzo_deinit (void)
+{
+ jffs2_bbc_unregister_compressor (&jffs2_bbc_lzo);
+}
Index: linux-2.4.35.4/fs/jffs2/jffs2_bbc_lzss_comp.c
===================================================================
--- /dev/null
+++ linux-2.4.35.4/fs/jffs2/jffs2_bbc_lzss_comp.c
@@ -0,0 +1,385 @@
+/* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 4; tab-width: 4 -*- */
+
+/*
+ jffs2_bbc_lzss_comp.c -- Lempel-Ziv-Storer-Szymanski compression module for jffs2
+ Copyright (C) 2004 Patrik Kluba
+ Based on the LZSS source included in LDS (lossless datacompression sources)
+ Block-compression modifications by Patrik Kluba
+ $Header: /openwrt/openwrt/package/linux/kernel-patches/301-jffs-compression,v 1.1 2005/03/26 10:33:31 wbx Exp $
+*/
+
+/*
+Original copyright follows:
+
+**************************************************************
+ LZSS.C -- A Data Compression Program
+**************************************************************
+ 4/6/1989 Haruhiko Okumura
+ Use, distribute, and modify this program freely.
+ Please send me your improved versions.
+ PC-VAN SCIENCE
+ NIFTY-Serve PAF01022
+ CompuServe 74050,1022
+**************************************************************
+
+*/
+
+/*
+
+ 2004-02-16 pajko <pajko(AT)halom(DOT)u-szeged(DOT)hu>
+ Initial release
+
+*/
+
+/* lzss.c */
+
+#define N 4096 /* size of ring buffer */
+#define F 18 /* upper limit for match_length */
+#define THRESHOLD 2 /* encode string into position and length
+ if match_length is greater than this */
+#define NIL N /* index for root of binary search trees */
+
+static unsigned char
+ text_buf[N + F - 1]; /* ring buffer of size N,
+ with extra F-1 bytes to facilitate string comparison */
+static unsigned long match_position, match_length; /* of longest match. These are
+ set by the InsertNode() procedure. */
+static unsigned long lson[N + 1], rson[N + 257], dad[N + 1]; /* left & right children &
+ parents -- These constitute binary search trees. */
+
+static void InitTree(void) /* initialize trees */
+{
+ unsigned long i;
+
+ /* For i = 0 to N - 1, rson[i] and lson[i] will be the right and
+ left children of node i. These nodes need not be initialized.
+ Also, dad[i] is the parent of node i. These are initialized to
+ NIL (= N), which stands for 'not used.'
+ For i = 0 to 255, rson[N + i + 1] is the root of the tree
+ for strings that begin with character i. These are initialized
+ to NIL. Note there are 256 trees. */
+
+ for (i = N + 1; i <= N + 256; i++) rson[i] = NIL;
+ for (i = 0; i < N; i++) dad[i] = NIL;
+}
+
+static void InsertNode(unsigned long r)
+ /* Inserts string of length F, text_buf[r..r+F-1], into one of the
+ trees (text_buf[r]'th tree) and returns the longest-match position
+ and length via the global variables match_position and match_length.
+ If match_length = F, then removes the old node in favor of the new
+ one, because the old one will be deleted sooner.
+ Note r plays double role, as tree node and position in buffer. */
+{
+ unsigned long i, p;
+ unsigned char *key;
+ signed long cmp;
+
+ cmp = 1; key = &text_buf[r]; p = N + 1 + key[0];
+ rson[r] = lson[r] = NIL; match_length = 0;
+ for ( ; ; ) {
+ if (cmp >= 0) {
+ if (rson[p] != NIL) p = rson[p];
+ else { rson[p] = r; dad[r] = p; return; }
+ } else {
+ if (lson[p] != NIL) p = lson[p];
+ else { lson[p] = r; dad[r] = p; return; }
+ }
+ for (i = 1; i < F; i++)
+ if ((cmp = key[i] - text_buf[p + i]) != 0) break;
+ if (i > match_length) {
+ match_position = p;
+ if ((match_length = i) >= F) break;
+ }
+ }
+ dad[r] = dad[p]; lson[r] = lson[p]; rson[r] = rson[p];
+ dad[lson[p]] = r; dad[rson[p]] = r;
+ if (rson[dad[p]] == p) rson[dad[p]] = r;
+ else lson[dad[p]] = r;
+ dad[p] = NIL; /* remove p */
+}
+
+static void DeleteNode(unsigned long p) /* deletes node p from tree */
+{
+ unsigned long q;
+
+ if (dad[p] == NIL) return; /* not in tree */
+ if (rson[p] == NIL) q = lson[p];
+ else if (lson[p] == NIL) q = rson[p];
+ else {
+ q = lson[p];
+ if (rson[q] != NIL) {
+ do { q = rson[q]; } while (rson[q] != NIL);
+ rson[dad[q]] = lson[q]; dad[lson[q]] = dad[q];
+ lson[q] = lson[p]; dad[lson[p]] = q;
+ }
+ rson[q] = rson[p]; dad[rson[p]] = q;
+ }
+ dad[q] = dad[p];
+ if (rson[dad[p]] == p) rson[dad[p]] = q; else lson[dad[p]] = q;
+ dad[p] = NIL;
+}
+
+/* modified for block compression */
+/* on return, srclen will contain the number of successfully compressed bytes
+ and dstlen will contain completed compressed bytes */
+
+static int Encode(unsigned char *srcbuf, unsigned char *dstbuf, unsigned long *srclen,
+ unsigned long *dstlen)
+{
+ unsigned long i, len, r, c, s, last_match_length, code_buf_ptr;
+ unsigned char code_buf[17], mask;
+ unsigned char *ip, *op;
+ unsigned long written = 0;
+ unsigned long read = 0;
+ unsigned char *srcend = srcbuf + *srclen;
+ unsigned char *dstend = dstbuf + *dstlen;
+ ip = srcbuf;
+ op = dstbuf;
+ InitTree(); /* initialize trees */
+ code_buf[0] = 0; /* code_buf[1..16] saves eight units of code, and
+ code_buf[0] works as eight flags, "1" representing that the unit
+ is an unencoded letter (1 byte), "0" a position-and-length pair
+ (2 bytes). Thus, eight units require at most 16 bytes of code. */
+ code_buf_ptr = mask = 1;
+ s = 0; r = N - F;
+ for (i = s; i < r; i++) text_buf[i] = ' '; /* Clear the buffer with
+ any character that will appear often. */
+ for (len = 0; (len < F) && (ip < srcend); len++)
+ text_buf[r + len] = *(ip++); /* Read F bytes into the last F bytes of
+ the buffer */
+ read = len;
+ for (i = 1; i <= F; i++) InsertNode(r - i); /* Insert the F strings,
+ each of which begins with one or more 'space' characters. Note
+ the order in which these strings are inserted. This way,
+ degenerate trees will be less likely to occur. */
+ InsertNode(r); /* Finally, insert the whole string just read. The
+ global variables match_length and match_position are set. */
+ do {
+ if (match_length > len) match_length = len; /* match_length
+ may be spuriously long near the end of text. */
+ if (match_length <= THRESHOLD) {
+ match_length = 1; /* Not long enough match. Send one byte. */
+ code_buf[0] |= mask; /* 'send one byte' flag */
+ code_buf[code_buf_ptr++] = text_buf[r]; /* Send uncoded. */
+ } else {
+ code_buf[code_buf_ptr++] = match_position;
+ code_buf[code_buf_ptr++] = (((match_position >> 4) & 0xf0)
+ | (match_length - (THRESHOLD + 1))); /* Send position and
+ length pair. Note match_length > THRESHOLD. */
+ }
+ if ((mask <<= 1) == 0) { /* Shift mask left one bit. */
+ if ((op + code_buf_ptr) > dstend) {
+ *dstlen = written; /* written contains bytes of complete compressed
+ code */
+ return -1;
+ };
+ for (i = 0; i < code_buf_ptr; *(op++) = code_buf[i++]); /* Send at most 8 units of */
+ /* code together */
+ written += code_buf_ptr;
+ *srclen = read; /* this many bytes have been successfully compressed */
+ code_buf[0] = 0; code_buf_ptr = mask = 1;
+ }
+ last_match_length = match_length;
+ for (i = 0; (i < last_match_length) && (ip < srcend); i++) {
+ c = *(ip++);
+ DeleteNode(s); /* Delete old strings and */
+ text_buf[s] = c; /* read new bytes */
+ if (s < F - 1) text_buf[s + N] = c; /* If the position is
+ near the end of buffer, extend the buffer to make
+ string comparison easier. */
+ s = (s + 1) & (N - 1); r = (r + 1) & (N - 1);
+ /* Since this is a ring buffer, increment the position
+ modulo N. */
+ InsertNode(r); /* Register the string in text_buf[r..r+F-1] */
+ }
+ read += i;
+ while (i++ < last_match_length) { /* After the end of text, */
+ DeleteNode(s); /* no need to read, but */
+ s = (s + 1) & (N - 1); r = (r + 1) & (N - 1);
+ if (--len) InsertNode(r); /* buffer may not be empty. */
+ }
+ } while (len > 0); /* until length of string to be processed is zero */
+ if (code_buf_ptr > 1) { /* Send remaining code. */
+ if ((op + code_buf_ptr) > dstend) {
+ *dstlen = written;
+ return -1;
+ }
+ for (i = 0; i < code_buf_ptr; *(op++) = code_buf[i++]);
+ written += code_buf_ptr;
+ *srclen = read;
+ }
+ *dstlen = written;
+ return 0;
+}
+
+static int Decode(unsigned char *srcbuf, unsigned char *dstbuf, unsigned long srclen,
+ unsigned long dstlen) /* Just the reverse of Encode(). */
+{
+ unsigned long i, r, c, j, k, flags;
+ unsigned char *ip, *op;
+ unsigned long written;
+ unsigned long read;
+ unsigned char *srcend = srcbuf + srclen;
+ unsigned char *dstend = dstbuf + dstlen;
+ read = written = 0;
+ ip = srcbuf;
+ op = dstbuf;
+ for (i = 0; i < N - F; i++) text_buf[i] = ' ';
+ r = N - F; flags = 0;
+ for ( ; ; ) {
+ if (((flags >>= 1) & 256) == 0) {
+ if (ip >= srcend) return 0;
+ c = *(ip++);
+ flags = c | 0xff00; /* uses higher byte cleverly */
+ } /* to count eight */
+ if (flags & 1) {
+ if (ip >= srcend) return 0;
+ c = *(ip++);
+ if (op >= dstend) return -1;
+ *(op++) = text_buf[r++] = c; r &= (N - 1);
+ } else {
+ if ((ip + 2) > srcend) return 0;
+ i = *(ip++);
+ j = *(ip++);
+ i |= ((j & 0xf0) << 4); j = (j & 0x0f) + THRESHOLD;
+ if ((op + j + 1) > dstend) return -1;
+ for (k = 0; k <= j; k++) {
+ c = text_buf[(i + k) & (N - 1)];
+ *(op++) = text_buf[r++] = c; r &= (N - 1);
+ }
+ }
+ }
+}
+
+/* interface to jffs2 bbc follows */
+
+#include "jffs2_bbc_framework.h"
+
+
+#define JFFS2_BBC_LZSS_BLOCK_SIGN {0x27, 0x6f, 0x12, 0xc4}
+
+static int
+jffs2_bbc_lzss_compressor_init (void);
+
+static void
+jffs2_bbc_lzss_compressor_deinit (void);
+
+static int
+jffs2_bbc_lzss_compress (void *model, unsigned char *input,
+ unsigned char *output, unsigned long *sourcelen,
+ unsigned long *dstlen);
+
+static int
+jffs2_bbc_lzss_estimate (void *model, unsigned char *input,
+ unsigned long sourcelen, unsigned long *dstlen,
+ unsigned long *readtime, unsigned long *writetime);
+
+static int
+jffs2_bbc_lzss_decompress (void *model, unsigned char *input,
+ unsigned char *output, unsigned long sourcelen,
+ unsigned long dstlen);
+
+static char *
+jffs2_bbc_lzss_proc_info (void);
+
+static int
+jffs2_bbc_lzss_proc_command (char *command);
+
+struct jffs2_bbc_compressor_type jffs2_bbc_lzss = {
+ "lzss",
+ 0,
+ JFFS2_BBC_LZSS_BLOCK_SIGN,
+ jffs2_bbc_lzss_compressor_init,
+ NULL,
+ NULL,
+ jffs2_bbc_lzss_compressor_deinit,
+ jffs2_bbc_lzss_compress,
+ jffs2_bbc_lzss_estimate,
+ jffs2_bbc_lzss_decompress,
+ jffs2_bbc_lzss_proc_info,
+ jffs2_bbc_lzss_proc_command
+};
+
+static int
+jffs2_bbc_lzss_compressor_init (void)
+{
+ return 0;
+}
+
+static void
+jffs2_bbc_lzss_compressor_deinit (void)
+{
+}
+
+static int
+jffs2_bbc_lzss_compress (void *model, unsigned char *input,
+ unsigned char *output, unsigned long *sourcelen,
+ unsigned long *dstlen)
+{
+ int retval;
+ unsigned long dst = *dstlen;
+ *(output++) = jffs2_bbc_lzss.block_sign[0];
+ *(output++) = jffs2_bbc_lzss.block_sign[1];
+ dst -= 2;
+ retval = Encode(input, output, sourcelen, &dst);
+ dst += 2;
+ *dstlen = dst;
+ return retval;
+}
+
+static int
+jffs2_bbc_lzss_estimate (void *model, unsigned char *input,
+ unsigned long sourcelen, unsigned long *dstlen,
+ unsigned long *readtime, unsigned long *writetime)
+{
+ *dstlen = sourcelen * 60 / 100;
+ *readtime = JFFS2_BBC_ZLIB_READ_TIME * 12 / 10;
+ *writetime = JFFS2_BBC_ZLIB_WRITE_TIME * 3;
+ return 0;
+}
+
+static int
+jffs2_bbc_lzss_decompress (void *model, unsigned char *input,
+ unsigned char *output, unsigned long sourcelen,
+ unsigned long dstlen)
+{
+ if ( ( *(input++) != (unsigned char)jffs2_bbc_lzss.block_sign[0] ) ||
+ ( *(input++) != (unsigned char)jffs2_bbc_lzss.block_sign[1] )
+ ) {
+ return -1;
+ } else {
+ return Decode(input, output, sourcelen - 2, dstlen);
+ }
+}
+
+static char *
+jffs2_bbc_lzss_proc_info (void)
+{
+ return "Lempel-Ziv-Storer-Szymanski compression module";
+}
+
+static int
+jffs2_bbc_lzss_proc_command (char *command)
+{
+ return 0;
+}
+
+struct jffs2_bbc_compressor_type *
+jffs2_bbc_lzss_init (int mode)
+{
+ if (jffs2_bbc_register_compressor (&jffs2_bbc_lzss) == 0)
+ {
+ return &jffs2_bbc_lzss;
+ }
+ else
+ {
+ return NULL;
+ }
+}
+
+void
+jffs2_bbc_lzss_deinit (void)
+{
+ jffs2_bbc_unregister_compressor (&jffs2_bbc_lzss);
+}
Index: linux-2.4.35.4/fs/jffs2/linux-2.4.25.hpatch
===================================================================
--- /dev/null
+++ linux-2.4.35.4/fs/jffs2/linux-2.4.25.hpatch
@@ -0,0 +1,97 @@
+FMakefile
+=BBC insertion
+-COMPR_OBJS
+iMakefile.bbc.inc
++
+I
+?JFFS2_OBJS
++ $(JFFS2_BBC_KERNEL_OBJS) \
+
+F../Config.in
+=BBC insertion
+-tristate 'Compressed ROM file system support' CONFIG_CRAMFS
+iConfig.in.bbc.inc
++
+I
+F../../Documentation/Configure.help
+=BBC insertion
+-JFFS stats available
+iConfigure.help.bbc.inc
++
+I
+Fcompr_zlib.c
+=(de)compress->(de)compress2
+-int zlib_compress(unsigned char *data_in, unsigned char *cpage_out,
++int jffs2_zlib_compress2(unsigned char *data_in, unsigned char *cpage_out,
+-void zlib_decompress(unsigned char *data_in, unsigned char *cpage_out,
++void jffs2_zlib_decompress2(unsigned char *data_in, unsigned char *cpage_out,
+?inflateEnd(&strm);
+?}
++
++extern int jffs2_zlib_compress(unsigned char *data_in, unsigned char *cpage_out, __u32 * sourcelen, __u32 * dstlen);
++extern void jffs2_zlib_decompress(unsigned char *data_in, unsigned char *cpage_out, __u32 srclen, __u32 destlen);
++
++int zlib_compress(unsigned char *data_in, unsigned char *cpage_out,
++ __u32 *sourcelen, __u32 *dstlen)
++{
++ return jffs2_zlib_compress(data_in,cpage_out,sourcelen,dstlen);
++}
++
++void zlib_decompress(unsigned char *data_in, unsigned char *cpage_out,
++ __u32 srclen, __u32 destlen)
++{
++ jffs2_zlib_decompress(data_in,cpage_out,srclen,destlen);
++}
++
+
+Ffile.c
+=set_act_sb before write
+-#include
++#include "jffs2_bbc_framework.h" /**BBC**/
+I
+?int jffs2_commit_write
+-jffs2_compress(
++ jffs2_bbc_model_set_act_sb(c); /**BBC**/
+I
+
+Fgc.c
+=set_act_sb before write
+-#include
++#include "jffs2_bbc_framework.h" /**BBC**/
+I
+?int jffs2_garbage_collect_dnode(
+-jffs2_compress(
++ jffs2_bbc_model_set_act_sb(c); /**BBC**/
+I
+
+Fread.c
+=set_act_sb before read
+-#include
++#include "jffs2_bbc_framework.h" /**BBC**/
+I
+?int jffs2_read_dnode(
+-jffs2_decompress(
++ jffs2_bbc_model_set_act_sb(c); /**BBC**/
+I
+
+Fsuper.c
+=init, load_model
+-#include
++#include "jffs2_bbc_fs.h" /**BBC**/
+I
+?struct super_block *jffs2_read_super(
+-return sb;
++ jffs2_bbc_load_model(sb); /**BBC**/
+I
+?void jffs2_put_super
+?c = JFFS2_SB_INFO
++ jffs2_bbc_unload_model(sb); /**BBC**/
+?init_jffs2_fs(void)
+?int ret;
++
++ jffs2_bbc_proc_init(); /**BBC**/
++
+?exit_jffs2_fs(void)
+?{
++ jffs2_bbc_proc_deinit(); /**BBC**/
++
Index: linux-2.4.35.4/fs/jffs2/read.c
===================================================================
--- linux-2.4.35.4.orig/fs/jffs2/read.c
+++ linux-2.4.35.4/fs/jffs2/read.c
@@ -35,6 +35,7 @@
*
*/
+#include "jffs2_bbc_framework.h" /**BBC**/
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/jffs2.h>
@@ -140,6 +141,7 @@ int jffs2_read_dnode(struct jffs2_sb_inf
D2(printk(KERN_DEBUG "Data CRC matches calculated CRC %08x\n", crc));
if (ri->compr != JFFS2_COMPR_NONE) {
D2(printk(KERN_DEBUG "Decompress %d bytes from %p to %d bytes at %p\n", ri->csize, readbuf, ri->dsize, decomprbuf));
+ jffs2_bbc_model_set_act_sb(c); /**BBC**/
ret = jffs2_decompress(ri->compr, readbuf, decomprbuf, ri->csize, ri->dsize);
if (ret) {
printk(KERN_WARNING "Error: jffs2_decompress returned %d\n", ret);
Index: linux-2.4.35.4/fs/jffs2/super.c
===================================================================
--- linux-2.4.35.4.orig/fs/jffs2/super.c
+++ linux-2.4.35.4/fs/jffs2/super.c
@@ -35,6 +35,7 @@
*
*/
+#include "jffs2_bbc_fs.h" /**BBC**/
#include <linux/config.h>
#include <linux/kernel.h>
#include <linux/module.h>
@@ -272,6 +273,7 @@ static struct super_block *jffs2_read_su
sb->s_magic = JFFS2_SUPER_MAGIC;
if (!(sb->s_flags & MS_RDONLY))
jffs2_start_garbage_collect_thread(c);
+ jffs2_bbc_load_model(sb); /**BBC**/
return sb;
out_root_i:
@@ -288,6 +290,7 @@ static struct super_block *jffs2_read_su
void jffs2_put_super (struct super_block *sb)
{
struct jffs2_sb_info *c = JFFS2_SB_INFO(sb);
+ jffs2_bbc_unload_model(sb); /**BBC**/
D2(printk(KERN_DEBUG "jffs2: jffs2_put_super()\n"));
@@ -344,6 +347,9 @@ static int __init init_jffs2_fs(void)
{
int ret;
+ jffs2_bbc_proc_init(); /**BBC**/
+
+
printk(KERN_NOTICE "JFFS2 version 2.1. (C) 2001 Red Hat, Inc., designed by Axis Communications AB.\n");
#ifdef JFFS2_OUT_OF_KERNEL
@@ -388,6 +394,8 @@ static int __init init_jffs2_fs(void)
static void __exit exit_jffs2_fs(void)
{
+ jffs2_bbc_proc_deinit(); /**BBC**/
+
jffs2_destroy_slab_caches();
jffs2_zlib_exit();
unregister_filesystem(&jffs2_fs_type);
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