mirror
/
openwrt
mirror of https://git.openwrt.org/openwrt/openwrt.git
1
0
Fork 0
Code Releases Activity
openwrt/tools/squashfs4/patches/160-expose_lzma_xz_options....

930 lines
24 KiB
Diff
Raw Blame History

--- /dev/null
+++ b/squashfs-tools/lzma_xz_options.h
@@ -0,0 +1,115 @@
+#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
+#ifdef __FreeBSD__
+#include <machine/endian.h>
+#endif
+#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 dict_size;
+ 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;
+};
+
+#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_LP_DEFAULT &&
+ options.pb == LZMA_OPT_PB_DEFAULT &&
+ options.fb == LZMA_OPT_FB_DEFAULT &&
+ 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_LP_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)
View Git Blame Copy Permalink