--- /dev/null
+--- /dev/null
++++ b/squashfs-tools/lzma_xz_options.h
+@@ -0,0 +1,112 @@
++#ifndef LZMA_XZ_OPTIONS_H
++#define LZMA_XZ_OPTIONS_H
++/*
++ * Copyright (c) 2011
++ * Jonas Gorski <jonas.gorski@gmail.com>
++ *
++ * 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,
++ * 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, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
++ *
++ * lzma_options.h
++ */
++
++#include <stdint.h>
++
++#ifndef linux
++#define __BYTE_ORDER BYTE_ORDER
++#define __BIG_ENDIAN BIG_ENDIAN
++#define __LITTLE_ENDIAN LITTLE_ENDIAN
++#else
++#include <endian.h>
++#endif
++
++
++
++struct lzma_opts {
++ uint32_t flags;
++#define LZMA_OPT_FLT_MASK 0xffff
++#define LZMA_OPT_PRE_OFF 16
++#define LZMA_OPT_PRE_MASK (0xf << LZMA_OPT_PRE_OFF)
++#define LZMA_OPT_EXTREME 20
++ uint16_t bit_opts;
++#define LZMA_OPT_LC_OFF 0
++#define LZMA_OPT_LC_MASK (0x7 << LZMA_OPT_LC_OFF)
++#define LZMA_OPT_LP_OFF 3
++#define LZMA_OPT_LP_MASK (0x7 << LZMA_OPT_LP_OFF)
++#define LZMA_OPT_PB_OFF 6
++#define LZMA_OPT_PB_MASK (0x7 << LZMA_OPT_PB_OFF)
++ uint16_t fb;
++ uint32_t dict_size;
++};
++
++#if __BYTE_ORDER == __BIG_ENDIAN
++extern unsigned int inswap_le32(unsigned int);
++
++#define SQUASHFS_INSWAP_LZMA_COMP_OPTS(s) { \
++ (s)->flags = inswap_le32((s)->flags); \
++ (s)->bit_opts = inswap_le16((s)->bit_opts); \
++ (s)->fb = inswap_le16((s)->fb); \
++ (s)->dict_size = inswap_le32((s)->dict_size); \
++}
++#else
++#define SQUASHFS_INSWAP_LZMA_COMP_OPTS(s)
++#endif
++
++#define MEMLIMIT (32 * 1024 * 1024)
++
++#define LZMA_OPT_LC_MIN 0
++#define LZMA_OPT_LC_MAX 4
++#define LZMA_OPT_LC_DEFAULT 3
++
++#define LZMA_OPT_LP_MIN 0
++#define LZMA_OPT_LP_MAX 4
++#define LZMA_OPT_LP_DEFAULT 0
++
++#define LZMA_OPT_PB_MIN 0
++#define LZMA_OPT_PB_MAX 4
++#define LZMA_OPT_PB_DEFAULT 2
++
++#define LZMA_OPT_FB_MIN 5
++#define LZMA_OPT_FB_MAX 273
++#define LZMA_OPT_FB_DEFAULT 64
++
++enum {
++ LZMA_OPT_LZMA = 1,
++ LZMA_OPT_XZ
++};
++
++struct lzma_xz_options {
++ int preset;
++ int extreme;
++ int lc;
++ int lp;
++ int pb;
++ int fb;
++ int dict_size;
++ int flags;
++};
++
++struct lzma_xz_options *lzma_xz_get_options(void);
++
++int lzma_xz_options(char *argv[], int argc, int lzmaver);
++
++int lzma_xz_options_post(int block_size, int lzmaver);
++
++void *lzma_xz_dump_options(int block_size, int *size, int flags);
++
++int lzma_xz_extract_options(int block_size, void *buffer, int size, int lzmaver);
++
++void lzma_xz_usage(int lzmaver);
++
++#endif
+--- /dev/null
++++ b/squashfs-tools/lzma_xz_options.c
+@@ -0,0 +1,365 @@
++/*
++ * Copyright (c) 2011
++ * Jonas Gorski <jonas.gorski@gmail.com>
++ *
++ * 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,
++ * 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, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
++ *
++ * lzma_options.c
++ *
++ * Common options for LZMA1 and 2 compressors. Based on xz_wrapper.c
++ */
++
++#include <stdio.h>
++#include <string.h>
++#include <stdlib.h>
++
++#include <lzma.h>
++
++#include "lzma_xz_options.h"
++
++static const char const *lzmaver_str[] = { "", "lzma", "xz" };
++
++static struct lzma_xz_options options = {
++ .flags = 0,
++ .preset = 6,
++ .extreme = 0,
++ .lc = LZMA_OPT_LC_DEFAULT,
++ .lp = LZMA_OPT_LP_DEFAULT,
++ .pb = LZMA_OPT_PB_DEFAULT,
++ .fb = LZMA_OPT_FB_DEFAULT,
++ .dict_size = 0,
++};
++
++static float lzma_dict_percent = 0;
++
++struct lzma_xz_options *lzma_xz_get_options(void)
++{
++ return &options;
++}
++
++
++int lzma_xz_options(char *argv[], int argc, int lzmaver)
++{
++ const char *comp_name = lzmaver_str[lzmaver];
++
++ if(strcmp(argv[0], "-Xpreset") == 0) {
++ int preset;
++
++ if(argc < 2) {
++ fprintf(stderr, "%s: -Xpreset missing preset\n", comp_name);
++ goto failed;
++ }
++
++ preset = atoi(argv[1]);
++
++ if (preset < 0 || preset > 9) {
++ fprintf(stderr, "%s: -Xpreset invalid value\n", comp_name);
++ goto failed;
++ }
++ options.preset = preset;
++ return 1;
++ } else if(strcmp(argv[0], "-Xe") == 0) {
++ options.extreme = 1;
++ return 0;
++ } else if(strcmp(argv[0], "-Xlc") == 0) {
++ int lc;
++
++ if(argc < 2) {
++ fprintf(stderr, "%s: -Xlc missing lc\n", comp_name);
++ goto failed;
++ }
++
++ lc = atoi(argv[1]);
++
++ if (lc < LZMA_OPT_LC_MIN || lc > LZMA_OPT_LC_MAX) {
++ fprintf(stderr, "%s: -Xlc invalid value\n", comp_name);
++ goto failed;
++ }
++ options.lc = lc;
++ return 1;
++ } else if(strcmp(argv[0], "-Xlp") == 0) {
++ int lp;
++
++ if(argc < 2) {
++ fprintf(stderr, "%s: -Xlp missing lp\n", comp_name);
++ goto failed;
++ }
++
++ lp = atoi(argv[1]);
++
++ if (lp < LZMA_OPT_LP_MIN || lp > LZMA_OPT_LP_MAX) {
++ fprintf(stderr, "%s: -Xlp invalid value\n", comp_name);
++ goto failed;
++ }
++ options.lp = lp;
++ return 1;
++ } else if(strcmp(argv[0], "-Xpb") == 0) {
++ int pb;
++
++ if(argc < 2) {
++ fprintf(stderr, "%s: -Xpb missing pb\n", comp_name);
++ goto failed;
++ }
++
++ pb = atoi(argv[1]);
++
++ if (pb < LZMA_OPT_PB_MIN || pb > LZMA_OPT_PB_MAX) {
++ fprintf(stderr, "%s: -Xbp invalid value\n", comp_name);
++ goto failed;
++ }
++ options.pb = pb;
++ return 1;
++ } else if(strcmp(argv[0], "-Xfb") == 0) {
++ int fb;
++
++ if(argc < 2) {
++ fprintf(stderr, "%s: -Xfb missing fb\n", comp_name);
++ goto failed;
++ }
++
++ fb = atoi(argv[1]);
++
++ if (fb < LZMA_OPT_FB_MIN || fb > LZMA_OPT_FB_MAX) {
++ fprintf(stderr, "%s: -Xfb invalid value\n", comp_name);
++ goto failed;
++ }
++ options.fb = fb;
++ return 1;
++ } else if(strcmp(argv[0], "-Xdict-size") == 0) {
++ char *b;
++ float size;
++
++ if(argc < 2) {
++ fprintf(stderr, "%s: -Xdict-size missing dict-size\n", comp_name);
++ goto failed;
++ }
++
++ size = strtof(argv[1], &b);
++ if(*b == '%') {
++ if(size <= 0 || size > 100) {
++ fprintf(stderr, "%s: -Xdict-size percentage "
++ "should be 0 < dict-size <= 100\n", comp_name);
++ goto failed;
++ }
++
++ lzma_dict_percent = size;
++ options.dict_size = 0;
++ } else {
++ if((float) ((int) size) != size) {
++ fprintf(stderr, "%s: -Xdict-size can't be "
++ "fractional unless a percentage of the"
++ " block size\n", comp_name);
++ goto failed;
++ }
++
++ lzma_dict_percent = 0;
++ options.dict_size = (int) size;
++
++ if(*b == 'k' || *b == 'K')
++ options.dict_size *= 1024;
++ else if(*b == 'm' || *b == 'M')
++ options.dict_size *= 1024 * 1024;
++ else if(*b != '\0') {
++ fprintf(stderr, "%s: -Xdict-size invalid "
++ "dict-size\n", comp_name);
++ goto failed;
++ }
++ }
++
++ return 1;
++ }
++
++ return -1;
++
++failed:
++ return -2;
++
++}
++
++int lzma_xz_options_post(int block_size, int lzmaver)
++{
++ const char *comp_name = lzmaver_str[lzmaver];
++ /*
++ * if -Xdict-size has been specified use this to compute the datablock
++ * dictionary size
++ */
++ if(options.dict_size || lzma_dict_percent) {
++ int dict_size_min = (lzmaver == 1 ? 4096 : 8192);
++ int n;
++
++ if(options.dict_size) {
++ if(options.dict_size > block_size) {
++ fprintf(stderr, "%s: -Xdict-size is larger than"
++ " block_size\n", comp_name);
++ goto failed;
++ }
++ } else
++ options.dict_size = block_size * lzma_dict_percent / 100;
++
++ if(options.dict_size < dict_size_min) {
++ fprintf(stderr, "%s: -Xdict-size should be %i bytes "
++ "or larger\n", comp_name, dict_size_min);
++ goto failed;
++ }
++
++ /*
++ * dictionary_size must be storable in xz header as either
++ * 2^n or as 2^n+2^(n+1)
++ */
++ n = ffs(options.dict_size) - 1;
++ if(options.dict_size != (1 << n) &&
++ options.dict_size != ((1 << n) + (1 << (n + 1)))) {
++ fprintf(stderr, "%s: -Xdict-size is an unsupported "
++ "value, dict-size must be storable in %s "
++ "header\n", comp_name, comp_name);
++ fprintf(stderr, "as either 2^n or as 2^n+2^(n+1). "
++ "Example dict-sizes are 75%%, 50%%, 37.5%%, "
++ "25%%,\n");
++ fprintf(stderr, "or 32K, 16K, 8K etc.\n");
++ goto failed;
++ }
++
++ } else
++ /* No -Xdict-size specified, use defaults */
++ options.dict_size = block_size;
++
++ return 0;
++
++failed:
++ return -1;
++}
++
++static struct lzma_opts lzma_comp_opts;
++
++void *lzma_xz_dump_options(int block_size, int *size, int flags)
++{
++ /* No need to store default options */
++ if (options.preset == 6 &&
++ options.extreme == 0 &&
++ options.lc == LZMA_OPT_LC_DEFAULT &&
++ options.lp == LZMA_OPT_LC_DEFAULT &&
++ options.pb == LZMA_OPT_PB_DEFAULT &&
++ options.fb == 0 &&
++ options.dict_size == block_size &&
++ flags == 0)
++ return NULL;
++
++ *size = sizeof(struct lzma_opts);
++
++ lzma_comp_opts.flags |= flags;
++
++ if (options.extreme)
++ lzma_comp_opts.flags |= LZMA_OPT_EXTREME;
++
++ lzma_comp_opts.flags |= ((options.preset << LZMA_OPT_PRE_OFF) & LZMA_OPT_PRE_MASK);
++
++ lzma_comp_opts.bit_opts =
++ ((options.lc << LZMA_OPT_LC_OFF) & LZMA_OPT_LC_MASK) |
++ ((options.lp << LZMA_OPT_LP_OFF) & LZMA_OPT_LP_MASK) |
++ ((options.pb << LZMA_OPT_PB_OFF) & LZMA_OPT_PB_MASK);
++ lzma_comp_opts.fb = options.fb;
++ lzma_comp_opts.dict_size = options.dict_size;
++
++ SQUASHFS_INSWAP_LZMA_COMP_OPTS(&lzma_comp_opts);
++
++ return &lzma_comp_opts;
++}
++
++int lzma_xz_extract_options(int block_size, void *buffer, int size, int lzmaver)
++{
++ if (size == 0) {
++ /* default options */
++ options.preset = 6;
++ options.extreme = 0;
++ options.lc = LZMA_OPT_LC_DEFAULT;
++ options.lp = LZMA_OPT_LC_DEFAULT;
++ options.pb = LZMA_OPT_PB_DEFAULT;
++ options.fb = LZMA_OPT_FB_DEFAULT;
++ options.dict_size = block_size;
++ options.flags = 0;
++ } else {
++ struct lzma_opts *comp_opts = buffer;
++ int n;
++
++ if (size != sizeof(struct lzma_opts))
++ goto failed;
++
++ SQUASHFS_INSWAP_LZMA_COMP_OPTS(&comp_opts);
++
++ options.flags = comp_opts->flags & LZMA_OPT_FLT_MASK;
++ options.preset = (comp_opts->flags & LZMA_OPT_PRE_MASK) >> LZMA_OPT_PRE_OFF;
++ options.extreme = !!(comp_opts->flags & LZMA_OPT_EXTREME);
++
++ options.lc = (comp_opts->bit_opts & LZMA_OPT_LC_MASK) >> LZMA_OPT_LC_OFF;
++ options.lp = (comp_opts->bit_opts & LZMA_OPT_LP_MASK) >> LZMA_OPT_LP_OFF;
++ options.pb = (comp_opts->bit_opts & LZMA_OPT_PB_MASK) >> LZMA_OPT_PB_OFF;
++ options.fb = comp_opts->fb;
++ options.dict_size = comp_opts->dict_size;
++
++ /* check that the LZMA bit options are in range */
++ if (options.lc < LZMA_OPT_LC_MIN || options.lc > LZMA_OPT_LC_MAX ||
++ options.lp < LZMA_OPT_LP_MIN || options.lp > LZMA_OPT_LP_MAX ||
++ options.pb < LZMA_OPT_PB_MIN || options.pb > LZMA_OPT_PB_MAX ||
++ options.fb < LZMA_OPT_FB_MIN || options.fb > LZMA_OPT_FB_MAX)
++ goto failed;
++
++ /*
++ * check that the dictionary size seems correct - the dictionary
++ * size should 2^n or 2^n+2^(n+1)
++ */
++ n = ffs(options.dict_size) - 1;
++ if(options.dict_size != (1 << n) &&
++ options.dict_size != ((1 << n) + (1 << (n + 1))))
++ goto failed;
++
++ }
++
++ return 0;
++
++failed:
++ fprintf(stderr, "%s: error reading stored compressor options from "
++ "filesystem!\n", lzmaver_str[lzmaver]);
++ return -1;
++}
++
++void lzma_xz_usage(int lzmaver)
++{
++ fprintf(stderr, "\t -Xpreset <preset>\n");
++ fprintf(stderr, "\t\tcompression preset (0-9, default 6)\n");
++ fprintf(stderr, "\t -Xe\n");
++ fprintf(stderr, "\t\tTry to improve compression ratio by using more ");
++ fprintf(stderr, "CPU time.\n");
++ fprintf(stderr, "\t -Xlc <lc>\n");
++ fprintf(stderr, "\t\tNumber of literal context bits (0-4, default 3)\n");
++ fprintf(stderr, "\t -Xlp <lp>\n");
++ fprintf(stderr, "\t\tNumber of literal position bits (0-4, default 0)\n");
++ fprintf(stderr, "\t -Xpb <pb>\n");
++ fprintf(stderr, "\t\tNumber of position bits (0-4, default 2)\n");
++ fprintf(stderr, "\t -Xnice <nice>\n");
++ fprintf(stderr, "\t\tNice length of a match (5-273, default 64)\n");
++ fprintf(stderr, "\t -Xdict-size <dict-size>\n");
++ fprintf(stderr, "\t\tUse <dict-size> as the %s dictionary size. The",
++ lzmaver == LZMA_OPT_LZMA ? "LZMA" : "XZ");
++ fprintf(stderr, " dictionary size\n\t\tcan be specified as a");
++ fprintf(stderr, " percentage of the block size, or as an\n\t\t");
++ fprintf(stderr, "absolute value. The dictionary size must be less");
++ fprintf(stderr, " than or equal\n\t\tto the block size and %d bytes",
++ lzmaver == LZMA_OPT_LZMA ? 4096 : 8192);
++ fprintf(stderr, " or larger. It must also be\n\t\tstorable in the lzma");
++ fprintf(stderr, " header as either 2^n or as 2^n+2^(n+1).\n\t\t");
++ fprintf(stderr, "Example dict-sizes are 75%%, 50%%, 37.5%%, 25%%, or");
++ fprintf(stderr, " 32K, 16K, 8K\n\t\tetc.\n");
++
++}
+--- a/squashfs-tools/lzma_xz_wrapper.c
++++ b/squashfs-tools/lzma_xz_wrapper.c
+@@ -27,6 +27,7 @@
+
+ #include "squashfs_fs.h"
+ #include "compressor.h"
++#include "lzma_xz_options.h"
+
+ #define LZMA_PROPS_SIZE 5
+ #define LZMA_UNCOMP_SIZE 8
+@@ -38,13 +39,27 @@
+ static int lzma_compress(void *dummy, void *dest, void *src, int size,
+ int block_size, int *error)
+ {
++ uint32_t preset;
+ unsigned char *d = (unsigned char *) dest;
++ struct lzma_xz_options *opts = lzma_xz_get_options();
++
+ lzma_options_lzma opt;
+ lzma_stream strm = LZMA_STREAM_INIT;
+ int res;
+
+- lzma_lzma_preset(&opt, LZMA_OPTIONS);
+- opt.dict_size = block_size;
++ preset = opts->preset;
++
++ if (opts->extreme)
++ preset |= LZMA_PRESET_EXTREME;
++
++ lzma_lzma_preset(&opt, opts->preset);
++ opt.lc = opts->lc;
++ opt.lp = opts->lp;
++ opt.pb = opts->pb;
++ if (opts->fb)
++ opt.nice_len = opts->fb;
++
++ opt.dict_size = opts->dict_size;
+
+ res = lzma_alone_encoder(&strm, &opt);
+ if(res != LZMA_OK) {
+@@ -143,13 +158,45 @@ failed:
+ return -1;
+ }
+
++static int lzma_options(char *argv[], int argc)
++{
++ return lzma_xz_options(argv, argc, LZMA_OPT_LZMA);
++}
++
++
++static int lzma_options_post(int block_size)
++{
++ return lzma_xz_options_post(block_size, LZMA_OPT_LZMA);
++}
++
++
++static void *lzma_dump_options(int block_size, int *size)
++{
++ return lzma_xz_dump_options(block_size, size, 0);
++}
++
++
++static int lzma_extract_options(int block_size, void *buffer, int size)
++{
++ return lzma_xz_extract_options(block_size, buffer, size, LZMA_OPT_LZMA);
++}
++
++
++void lzma_usage()
++{
++ lzma_xz_usage(LZMA_OPT_LZMA);
++}
++
+
+ struct compressor lzma_comp_ops = {
+ .init = NULL,
+ .compress = lzma_compress,
+ .uncompress = lzma_uncompress,
+- .options = NULL,
+- .usage = NULL,
++ .options = lzma_options,
++ .options_post = lzma_options_post,
++ .dump_options = lzma_dump_options,
++ .extract_options = lzma_extract_options,
++ .usage = lzma_usage,
+ .id = LZMA_COMPRESSION,
+ .name = "lzma",
+ .supported = 1
+--- a/squashfs-tools/xz_wrapper.h
++++ b/squashfs-tools/xz_wrapper.h
+@@ -24,25 +24,6 @@
+ *
+ */
+
+-#ifndef linux
+-#define __BYTE_ORDER BYTE_ORDER
+-#define __BIG_ENDIAN BIG_ENDIAN
+-#define __LITTLE_ENDIAN LITTLE_ENDIAN
+-#else
+-#include <endian.h>
+-#endif
+-
+-#if __BYTE_ORDER == __BIG_ENDIAN
+-extern unsigned int inswap_le32(unsigned int);
+-
+-#define SQUASHFS_INSWAP_COMP_OPTS(s) { \
+- (s)->dictionary_size = inswap_le32((s)->dictionary_size); \
+- (s)->flags = inswap_le32((s)->flags); \
+-}
+-#else
+-#define SQUASHFS_INSWAP_COMP_OPTS(s)
+-#endif
+-
+ #define MEMLIMIT (32 * 1024 * 1024)
+
+ struct bcj {
+--- a/squashfs-tools/xz_wrapper.c
++++ b/squashfs-tools/xz_wrapper.c
+@@ -30,6 +30,7 @@
+ #include "squashfs_fs.h"
+ #include "xz_wrapper.h"
+ #include "compressor.h"
++#include "lzma_xz_options.h"
+
+ static struct bcj bcj[] = {
+ { "x86", LZMA_FILTER_X86, 0 },
+@@ -41,22 +42,18 @@ static struct bcj bcj[] = {
+ { NULL, LZMA_VLI_UNKNOWN, 0 }
+ };
+
+-static struct comp_opts comp_opts;
+-
+ static int filter_count = 1;
+-static int dictionary_size = 0;
+-static float dictionary_percent = 0;
+
+
+ static int xz_options(char *argv[], int argc)
+ {
+- int i;
+- char *name;
+-
+ if(strcmp(argv[0], "-Xbcj") == 0) {
++ int i;
++ char *name;
++
+ if(argc < 2) {
+ fprintf(stderr, "xz: -Xbcj missing filter\n");
+- goto failed;
++ return -2;
+ }
+
+ name = argv[1];
+@@ -76,190 +73,50 @@ static int xz_options(char *argv[], int
+ }
+ if(bcj[i].name == NULL) {
+ fprintf(stderr, "xz: -Xbcj unrecognised "
+- "filter\n");
+- goto failed;
+- }
+- }
+-
+- return 1;
+- } else if(strcmp(argv[0], "-Xdict-size") == 0) {
+- char *b;
+- float size;
+-
+- if(argc < 2) {
+- fprintf(stderr, "xz: -Xdict-size missing dict-size\n");
+- goto failed;
+- }
+-
+- size = strtof(argv[1], &b);
+- if(*b == '%') {
+- if(size <= 0 || size > 100) {
+- fprintf(stderr, "xz: -Xdict-size percentage "
+- "should be 0 < dict-size <= 100\n");
+- goto failed;
+- }
+-
+- dictionary_percent = size;
+- dictionary_size = 0;
+- } else {
+- if((float) ((int) size) != size) {
+- fprintf(stderr, "xz: -Xdict-size can't be "
+- "fractional unless a percentage of the"
+- " block size\n");
+- goto failed;
+- }
+-
+- dictionary_percent = 0;
+- dictionary_size = (int) size;
+-
+- if(*b == 'k' || *b == 'K')
+- dictionary_size *= 1024;
+- else if(*b == 'm' || *b == 'M')
+- dictionary_size *= 1024 * 1024;
+- else if(*b != '\0') {
+- fprintf(stderr, "xz: -Xdict-size invalid "
+- "dict-size\n");
+- goto failed;
++ "filter\n");
++ return -2;
+ }
+ }
+-
+ return 1;
++ } else {
++ return lzma_xz_options(argv, argc, LZMA_OPT_XZ);
+ }
+-
+- return -1;
+-
+-failed:
+- return -2;
+ }
+
+
+ static int xz_options_post(int block_size)
+ {
+- /*
+- * if -Xdict-size has been specified use this to compute the datablock
+- * dictionary size
+- */
+- if(dictionary_size || dictionary_percent) {
+- int n;
+-
+- if(dictionary_size) {
+- if(dictionary_size > block_size) {
+- fprintf(stderr, "xz: -Xdict-size is larger than"
+- " block_size\n");
+- goto failed;
+- }
+- } else
+- dictionary_size = block_size * dictionary_percent / 100;
+-
+- if(dictionary_size < 8192) {
+- fprintf(stderr, "xz: -Xdict-size should be 8192 bytes "
+- "or larger\n");
+- goto failed;
+- }
+-
+- /*
+- * dictionary_size must be storable in xz header as either
+- * 2^n or as 2^n+2^(n+1)
+- */
+- n = ffs(dictionary_size) - 1;
+- if(dictionary_size != (1 << n) &&
+- dictionary_size != ((1 << n) + (1 << (n + 1)))) {
+- fprintf(stderr, "xz: -Xdict-size is an unsupported "
+- "value, dict-size must be storable in xz "
+- "header\n");
+- fprintf(stderr, "as either 2^n or as 2^n+2^(n+1). "
+- "Example dict-sizes are 75%%, 50%%, 37.5%%, "
+- "25%%,\n");
+- fprintf(stderr, "or 32K, 16K, 8K etc.\n");
+- goto failed;
+- }
+-
+- } else
+- /* No -Xdict-size specified, use defaults */
+- dictionary_size = block_size;
+-
+- return 0;
+-
+-failed:
+- return -1;
++ return lzma_xz_options_post(block_size, LZMA_OPT_XZ);
+ }
+
+
+ static void *xz_dump_options(int block_size, int *size)
+ {
+- int flags = 0, i;
+-
+- /*
+- * don't store compressor specific options in file system if the
+- * default options are being used - no compressor options in the
+- * file system means the default options are always assumed
+- *
+- * Defaults are:
+- * metadata dictionary size: SQUASHFS_METADATA_SIZE
+- * datablock dictionary size: block_size
+- * 1 filter
+- */
+- if(dictionary_size == block_size && filter_count == 1)
+- return NULL;
++ int i, flags = 0;
+
+ for(i = 0; bcj[i].name; i++)
+ flags |= bcj[i].selected << i;
+
+- comp_opts.dictionary_size = dictionary_size;
+- comp_opts.flags = flags;
+-
+- SQUASHFS_INSWAP_COMP_OPTS(&comp_opts);
+-
+- *size = sizeof(comp_opts);
+- return &comp_opts;
++ return lzma_xz_dump_options(block_size, size, flags);
+ }
+
+
+ static int xz_extract_options(int block_size, void *buffer, int size)
+ {
+- struct comp_opts *comp_opts = buffer;
+- int flags, i, n;
+-
+- if(size == 0) {
+- /* set defaults */
+- dictionary_size = block_size;
+- flags = 0;
+- } else {
+- /* check passed comp opts struct is of the correct length */
+- if(size != sizeof(struct comp_opts))
+- goto failed;
+-
+- SQUASHFS_INSWAP_COMP_OPTS(comp_opts);
+-
+- dictionary_size = comp_opts->dictionary_size;
+- flags = comp_opts->flags;
+-
+- /*
+- * check that the dictionary size seems correct - the dictionary
+- * size should 2^n or 2^n+2^(n+1)
+- */
+- n = ffs(dictionary_size) - 1;
+- if(dictionary_size != (1 << n) &&
+- dictionary_size != ((1 << n) + (1 << (n + 1))))
+- goto failed;
+- }
++ int ret = lzma_xz_extract_options(block_size, buffer, size, LZMA_OPT_XZ);
+
+- filter_count = 1;
+- for(i = 0; bcj[i].name; i++) {
+- if((flags >> i) & 1) {
+- bcj[i].selected = 1;
+- filter_count ++;
+- } else
+- bcj[i].selected = 0;
++ if (!ret) {
++ int i;
++ struct lzma_xz_options *opts = lzma_xz_get_options();
++ for(i = 0; bcj[i].name; i++) {
++ if((opts->flags >> i) & 1) {
++ bcj[i].selected = 1;
++ filter_count ++;
++ } else
++ bcj[i].selected = 0;
++ }
+ }
+-
+- return 0;
+-
+-failed:
+- fprintf(stderr, "xz: error reading stored compressor options from "
+- "filesystem!\n");
+-
+- return -1;
++ return ret;
+ }
+
+
+@@ -268,6 +125,7 @@ static int xz_init(void **strm, int bloc
+ int i, j, filters = datablock ? filter_count : 1;
+ struct filter *filter = malloc(filters * sizeof(struct filter));
+ struct xz_stream *stream;
++ struct lzma_xz_options *opts = lzma_xz_get_options();
+
+ if(filter == NULL)
+ goto failed;
+@@ -281,7 +139,7 @@ static int xz_init(void **strm, int bloc
+
+ memset(filter, 0, filters * sizeof(struct filter));
+
+- stream->dictionary_size = datablock ? dictionary_size :
++ stream->dictionary_size = datablock ? opts->dict_size :
+ SQUASHFS_METADATA_SIZE;
+
+ filter[0].filter[0].id = LZMA_FILTER_LZMA2;
+@@ -323,14 +181,25 @@ static int xz_compress(void *strm, void
+ lzma_ret res = 0;
+ struct xz_stream *stream = strm;
+ struct filter *selected = NULL;
++ struct lzma_xz_options *opts = lzma_xz_get_options();
+
+ stream->filter[0].buffer = dest;
+
+ for(i = 0; i < stream->filters; i++) {
++ uint32_t preset = opts->preset;
+ struct filter *filter = &stream->filter[i];
+
+- if(lzma_lzma_preset(&stream->opt, LZMA_PRESET_DEFAULT))
+- goto failed;
++ if (opts->extreme)
++ preset |= LZMA_PRESET_EXTREME;
++
++ if(lzma_lzma_preset(&stream->opt, preset))
++ goto failed;
++
++ stream->opt.lc = opts->lc;
++ stream->opt.lp = opts->lp;
++ stream->opt.pb = opts->pb;
++ if (opts->fb)
++ stream->opt.nice_len = opts->fb;
+
+ stream->opt.dict_size = stream->dictionary_size;
+
+@@ -384,22 +253,13 @@ static int xz_uncompress(void *dest, voi
+
+ void xz_usage()
+ {
++ lzma_xz_usage(LZMA_OPT_XZ);
+ fprintf(stderr, "\t -Xbcj filter1,filter2,...,filterN\n");
+ fprintf(stderr, "\t\tCompress using filter1,filter2,...,filterN in");
+ fprintf(stderr, " turn\n\t\t(in addition to no filter), and choose");
+ fprintf(stderr, " the best compression.\n");
+ fprintf(stderr, "\t\tAvailable filters: x86, arm, armthumb,");
+ fprintf(stderr, " powerpc, sparc, ia64\n");
+- fprintf(stderr, "\t -Xdict-size <dict-size>\n");
+- fprintf(stderr, "\t\tUse <dict-size> as the XZ dictionary size. The");
+- fprintf(stderr, " dictionary size\n\t\tcan be specified as a");
+- fprintf(stderr, " percentage of the block size, or as an\n\t\t");
+- fprintf(stderr, "absolute value. The dictionary size must be less");
+- fprintf(stderr, " than or equal\n\t\tto the block size and 8192 bytes");
+- fprintf(stderr, " or larger. It must also be\n\t\tstorable in the xz");
+- fprintf(stderr, " header as either 2^n or as 2^n+2^(n+1).\n\t\t");
+- fprintf(stderr, "Example dict-sizes are 75%%, 50%%, 37.5%%, 25%%, or");
+- fprintf(stderr, " 32K, 16K, 8K\n\t\tetc.\n");
+ }
+
+
+--- a/squashfs-tools/Makefile
++++ b/squashfs-tools/Makefile
+@@ -140,6 +140,8 @@ COMPRESSORS += xz
+ endif
+
+ ifneq ($(LZMA_XZ_SUPPORT)$(XZ_SUPPORT),)
++MKSQUASHFS_OBJS += lzma_xz_options.o
++UNSQUASHFS_OBJS += lzma_xz_options.o
+ ifneq ($(LZMA_LIB),)
+ MKSQUASHFS_OBJS += $(LZMA_LIB)
+ UNSQUASHFS_OBJS += $(LZMA_LIB)
projects / openwrt / staging / lynxis.git / blobdiff