tools/squashfs4/patches/160-expose_lzma_xz_options.patch

   1 --- /dev/null
   2 +++ b/squashfs-tools/lzma_xz_options.h
   3 @@ -0,0 +1,112 @@
   4 +#ifndef LZMA_XZ_OPTIONS_H
   5 +#define LZMA_XZ_OPTIONS_H
   6 +/*
   7 + * Copyright (c) 2011
   8 + * Jonas Gorski <jonas.gorski@gmail.com>
   9 + *
  10 + * This program is free software; you can redistribute it and/or
  11 + * modify it under the terms of the GNU General Public License
  12 + * as published by the Free Software Foundation; either version 2,
  13 + * or (at your option) any later version.
  14 + *
  15 + * This program is distributed in the hope that it will be useful,
  16 + * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17 + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18 + * GNU General Public License for more details.
  19 + *
  20 + * You should have received a copy of the GNU General Public License
  21 + * along with this program; if not, write to the Free Software
  22 + * Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  23 + *
  24 + * lzma_options.h
  25 + */
  26 +
  27 +#include <stdint.h>
  28 +
  29 +#ifndef linux
  30 +#define __BYTE_ORDER BYTE_ORDER
  31 +#define __BIG_ENDIAN BIG_ENDIAN
  32 +#define __LITTLE_ENDIAN LITTLE_ENDIAN
  33 +#else
  34 +#include <endian.h>
  35 +#endif
  36 +
  37 +
  38 +
  39 +struct lzma_opts {
  40 +       uint32_t flags;
  41 +#define LZMA_OPT_FLT_MASK      0xffff
  42 +#define LZMA_OPT_PRE_OFF       16
  43 +#define LZMA_OPT_PRE_MASK      (0xf << LZMA_OPT_PRE_OFF)
  44 +#define LZMA_OPT_EXTREME       20
  45 +       uint16_t bit_opts;
  46 +#define LZMA_OPT_LC_OFF                0
  47 +#define LZMA_OPT_LC_MASK       (0x7 << LZMA_OPT_LC_OFF)
  48 +#define LZMA_OPT_LP_OFF                3
  49 +#define LZMA_OPT_LP_MASK       (0x7 << LZMA_OPT_LP_OFF)
  50 +#define LZMA_OPT_PB_OFF                6
  51 +#define LZMA_OPT_PB_MASK       (0x7 << LZMA_OPT_PB_OFF)
  52 +       uint16_t fb;
  53 +       uint32_t dict_size;
  54 +};
  55 +
  56 +#if __BYTE_ORDER == __BIG_ENDIAN
  57 +extern unsigned int inswap_le32(unsigned int);
  58 +
  59 +#define SQUASHFS_INSWAP_LZMA_COMP_OPTS(s) { \
  60 +       (s)->flags = inswap_le32((s)->flags); \
  61 +       (s)->bit_opts = inswap_le16((s)->bit_opts); \
  62 +       (s)->fb = inswap_le16((s)->fb); \
  63 +       (s)->dict_size = inswap_le32((s)->dict_size); \
  64 +}
  65 +#else
  66 +#define SQUASHFS_INSWAP_LZMA_COMP_OPTS(s)
  67 +#endif
  68 +
  69 +#define MEMLIMIT (32 * 1024 * 1024)
  70 +
  71 +#define LZMA_OPT_LC_MIN                0
  72 +#define LZMA_OPT_LC_MAX                4
  73 +#define LZMA_OPT_LC_DEFAULT    3
  74 +
  75 +#define LZMA_OPT_LP_MIN                0
  76 +#define LZMA_OPT_LP_MAX                4
  77 +#define LZMA_OPT_LP_DEFAULT    0
  78 +
  79 +#define LZMA_OPT_PB_MIN                0
  80 +#define LZMA_OPT_PB_MAX                4
  81 +#define LZMA_OPT_PB_DEFAULT    2
  82 +
  83 +#define LZMA_OPT_FB_MIN                5
  84 +#define LZMA_OPT_FB_MAX                273
  85 +#define LZMA_OPT_FB_DEFAULT    64
  86 +
  87 +enum {
  88 +       LZMA_OPT_LZMA = 1,
  89 +       LZMA_OPT_XZ
  90 +};
  91 +
  92 +struct lzma_xz_options {
  93 +       int preset;
  94 +       int extreme;
  95 +       int lc;
  96 +       int lp;
  97 +       int pb;
  98 +       int fb;
  99 +       int dict_size;
 100 +       int flags;
 101 +};
 102 +
 103 +struct lzma_xz_options *lzma_xz_get_options(void);
 104 +
 105 +int lzma_xz_options(char *argv[], int argc, int lzmaver);
 106 +
 107 +int lzma_xz_options_post(int block_size, int lzmaver);
 108 +
 109 +void *lzma_xz_dump_options(int block_size, int *size, int flags);
 110 +
 111 +int lzma_xz_extract_options(int block_size, void *buffer, int size, int lzmaver);
 112 +
 113 +void lzma_xz_usage(int lzmaver);
 114 +
 115 +#endif
 116 --- /dev/null
 117 +++ b/squashfs-tools/lzma_xz_options.c
 118 @@ -0,0 +1,365 @@
 119 +/*
 120 + * Copyright (c) 2011
 121 + * Jonas Gorski <jonas.gorski@gmail.com>
 122 + *
 123 + * This program is free software; you can redistribute it and/or
 124 + * modify it under the terms of the GNU General Public License
 125 + * as published by the Free Software Foundation; either version 2,
 126 + * or (at your option) any later version.
 127 + *
 128 + * This program is distributed in the hope that it will be useful,
 129 + * but WITHOUT ANY WARRANTY; without even the implied warranty of
 130 + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 131 + * GNU General Public License for more details.
 132 + *
 133 + * You should have received a copy of the GNU General Public License
 134 + * along with this program; if not, write to the Free Software
 135 + * Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 136 + *
 137 + * lzma_options.c
 138 + *
 139 + * Common options for LZMA1 and 2 compressors. Based on xz_wrapper.c
 140 + */
 141 +
 142 +#include <stdio.h>
 143 +#include <string.h>
 144 +#include <stdlib.h>
 145 +
 146 +#include <lzma.h>
 147 +
 148 +#include "lzma_xz_options.h"
 149 +
 150 +static const char const *lzmaver_str[] = { "", "lzma", "xz" };
 151 +
 152 +static struct lzma_xz_options options = {
 153 +       .flags          = 0,
 154 +       .preset         = 6,
 155 +       .extreme        = 0,
 156 +       .lc             = LZMA_OPT_LC_DEFAULT,
 157 +       .lp             = LZMA_OPT_LP_DEFAULT,
 158 +       .pb             = LZMA_OPT_PB_DEFAULT,
 159 +       .fb             = LZMA_OPT_FB_DEFAULT,
 160 +       .dict_size      = 0,
 161 +};
 162 +
 163 +static float lzma_dict_percent = 0;
 164 +
 165 +struct lzma_xz_options *lzma_xz_get_options(void)
 166 +{
 167 +       return &options;
 168 +}
 169 +
 170 +
 171 +int lzma_xz_options(char *argv[], int argc, int lzmaver)
 172 +{
 173 +       const char *comp_name = lzmaver_str[lzmaver];
 174 +
 175 +       if(strcmp(argv[0], "-Xpreset") == 0) {
 176 +               int preset;
 177 +
 178 +               if(argc < 2) {
 179 +                       fprintf(stderr, "%s: -Xpreset missing preset\n", comp_name);
 180 +                       goto failed;
 181 +               }
 182 +
 183 +               preset = atoi(argv[1]);
 184 +
 185 +               if (preset < 0 || preset > 9) {
 186 +                       fprintf(stderr, "%s: -Xpreset invalid value\n", comp_name);
 187 +                       goto failed;
 188 +               }
 189 +               options.preset = preset;
 190 +               return 1;
 191 +       } else if(strcmp(argv[0], "-Xe") == 0) {
 192 +               options.extreme = 1;
 193 +               return 0;
 194 +       } else if(strcmp(argv[0], "-Xlc") == 0) {
 195 +               int lc;
 196 +
 197 +               if(argc < 2) {
 198 +                       fprintf(stderr, "%s: -Xlc missing lc\n", comp_name);
 199 +                       goto failed;
 200 +               }
 201 +
 202 +               lc = atoi(argv[1]);
 203 +
 204 +               if (lc < LZMA_OPT_LC_MIN || lc > LZMA_OPT_LC_MAX) {
 205 +                       fprintf(stderr, "%s: -Xlc invalid value\n", comp_name);
 206 +                       goto failed;
 207 +               }
 208 +               options.lc = lc;
 209 +               return 1;
 210 +       } else if(strcmp(argv[0], "-Xlp") == 0) {
 211 +               int lp;
 212 +
 213 +               if(argc < 2) {
 214 +                       fprintf(stderr, "%s: -Xlp missing lp\n", comp_name);
 215 +                       goto failed;
 216 +               }
 217 +
 218 +               lp = atoi(argv[1]);
 219 +
 220 +               if (lp < LZMA_OPT_LP_MIN || lp > LZMA_OPT_LP_MAX) {
 221 +                       fprintf(stderr, "%s: -Xlp invalid value\n", comp_name);
 222 +                       goto failed;
 223 +               }
 224 +               options.lp = lp;
 225 +               return 1;
 226 +       } else if(strcmp(argv[0], "-Xpb") == 0) {
 227 +               int pb;
 228 +
 229 +               if(argc < 2) {
 230 +                       fprintf(stderr, "%s: -Xpb missing pb\n", comp_name);
 231 +                       goto failed;
 232 +               }
 233 +
 234 +               pb = atoi(argv[1]);
 235 +
 236 +               if (pb < LZMA_OPT_PB_MIN || pb > LZMA_OPT_PB_MAX) {
 237 +                       fprintf(stderr, "%s: -Xbp invalid value\n", comp_name);
 238 +                       goto failed;
 239 +               }
 240 +               options.pb = pb;
 241 +               return 1;
 242 +       } else if(strcmp(argv[0], "-Xfb") == 0) {
 243 +               int fb;
 244 +
 245 +               if(argc < 2) {
 246 +                       fprintf(stderr, "%s: -Xfb missing fb\n", comp_name);
 247 +                       goto failed;
 248 +               }
 249 +
 250 +               fb = atoi(argv[1]);
 251 +
 252 +               if (fb < LZMA_OPT_FB_MIN || fb > LZMA_OPT_FB_MAX) {
 253 +                       fprintf(stderr, "%s: -Xfb invalid value\n", comp_name);
 254 +                       goto failed;
 255 +               }
 256 +               options.fb = fb;
 257 +               return 1;
 258 +       } else if(strcmp(argv[0], "-Xdict-size") == 0) {
 259 +               char *b;
 260 +               float size;
 261 +
 262 +               if(argc < 2) {
 263 +                       fprintf(stderr, "%s: -Xdict-size missing dict-size\n", comp_name);
 264 +                       goto failed;
 265 +               }
 266 +
 267 +               size = strtof(argv[1], &b);
 268 +               if(*b == '%') {
 269 +                       if(size <= 0 || size > 100) {
 270 +                               fprintf(stderr, "%s: -Xdict-size percentage "
 271 +                                       "should be 0 < dict-size <= 100\n", comp_name);
 272 +                               goto failed;
 273 +                       }
 274 +
 275 +                       lzma_dict_percent = size;
 276 +                       options.dict_size = 0;
 277 +               } else {
 278 +                       if((float) ((int) size) != size) {
 279 +                               fprintf(stderr, "%s: -Xdict-size can't be "
 280 +                                       "fractional unless a percentage of the"
 281 +                                       " block size\n", comp_name);
 282 +                               goto failed;
 283 +                       }
 284 +
 285 +                       lzma_dict_percent = 0;
 286 +                       options.dict_size = (int) size;
 287 +
 288 +                       if(*b == 'k' || *b == 'K')
 289 +                               options.dict_size *= 1024;
 290 +                       else if(*b == 'm' || *b == 'M')
 291 +                               options.dict_size *= 1024 * 1024;
 292 +                       else if(*b != '\0') {
 293 +                               fprintf(stderr, "%s: -Xdict-size invalid "
 294 +                                       "dict-size\n", comp_name);
 295 +                               goto failed;
 296 +                       }
 297 +               }
 298 +
 299 +               return 1;
 300 +       }
 301 +
 302 +       return -1;
 303 +
 304 +failed:
 305 +       return -2;
 306 +
 307 +}
 308 +
 309 +int lzma_xz_options_post(int block_size, int lzmaver)
 310 +{
 311 +       const char *comp_name = lzmaver_str[lzmaver];
 312 +       /*
 313 +        * if -Xdict-size has been specified use this to compute the datablock
 314 +        * dictionary size
 315 +        */
 316 +       if(options.dict_size || lzma_dict_percent) {
 317 +               int dict_size_min = (lzmaver == 1 ? 4096 : 8192);
 318 +               int n;
 319 +
 320 +               if(options.dict_size) {
 321 +                       if(options.dict_size > block_size) {
 322 +                               fprintf(stderr, "%s: -Xdict-size is larger than"
 323 +                               " block_size\n", comp_name);
 324 +                               goto failed;
 325 +                       }
 326 +               } else
 327 +                       options.dict_size = block_size * lzma_dict_percent / 100;
 328 +
 329 +               if(options.dict_size < dict_size_min) {
 330 +                       fprintf(stderr, "%s: -Xdict-size should be %i bytes "
 331 +                               "or larger\n", comp_name, dict_size_min);
 332 +                       goto failed;
 333 +               }
 334 +
 335 +               /*
 336 +                * dictionary_size must be storable in xz header as either
 337 +                * 2^n or as  2^n+2^(n+1)
 338 +               */
 339 +               n = ffs(options.dict_size) - 1;
 340 +               if(options.dict_size != (1 << n) &&
 341 +                               options.dict_size != ((1 << n) + (1 << (n + 1)))) {
 342 +                       fprintf(stderr, "%s: -Xdict-size is an unsupported "
 343 +                               "value, dict-size must be storable in %s "
 344 +                               "header\n", comp_name, comp_name);
 345 +                       fprintf(stderr, "as either 2^n or as 2^n+2^(n+1).  "
 346 +                               "Example dict-sizes are 75%%, 50%%, 37.5%%, "
 347 +                               "25%%,\n");
 348 +                       fprintf(stderr, "or 32K, 16K, 8K etc.\n");
 349 +                       goto failed;
 350 +               }
 351 +
 352 +       } else
 353 +               /* No -Xdict-size specified, use defaults */
 354 +               options.dict_size = block_size;
 355 +
 356 +       return 0;
 357 +
 358 +failed:
 359 +       return -1;
 360 +}
 361 +
 362 +static struct lzma_opts lzma_comp_opts;
 363 +
 364 +void *lzma_xz_dump_options(int block_size, int *size, int flags)
 365 +{
 366 +       /* No need to store default options */
 367 +       if (options.preset == 6 &&
 368 +                       options.extreme == 0 &&
 369 +                       options.lc == LZMA_OPT_LC_DEFAULT &&
 370 +                       options.lp == LZMA_OPT_LC_DEFAULT &&
 371 +                       options.pb == LZMA_OPT_PB_DEFAULT &&
 372 +                       options.fb == 0 &&
 373 +                       options.dict_size == block_size &&
 374 +                       flags == 0)
 375 +               return NULL;
 376 +
 377 +       *size = sizeof(struct lzma_opts);
 378 +
 379 +       lzma_comp_opts.flags |= flags;
 380 +
 381 +       if (options.extreme)
 382 +               lzma_comp_opts.flags |= LZMA_OPT_EXTREME;
 383 +
 384 +       lzma_comp_opts.flags |= ((options.preset << LZMA_OPT_PRE_OFF) & LZMA_OPT_PRE_MASK);
 385 +
 386 +       lzma_comp_opts.bit_opts =
 387 +                       ((options.lc << LZMA_OPT_LC_OFF) & LZMA_OPT_LC_MASK) |
 388 +                       ((options.lp << LZMA_OPT_LP_OFF) & LZMA_OPT_LP_MASK) |
 389 +                       ((options.pb << LZMA_OPT_PB_OFF) & LZMA_OPT_PB_MASK);
 390 +       lzma_comp_opts.fb = options.fb;
 391 +       lzma_comp_opts.dict_size = options.dict_size;
 392 +
 393 +       SQUASHFS_INSWAP_LZMA_COMP_OPTS(&lzma_comp_opts);
 394 +
 395 +       return &lzma_comp_opts;
 396 +}
 397 +
 398 +int lzma_xz_extract_options(int block_size, void *buffer, int size, int lzmaver)
 399 +{
 400 +       if (size == 0) {
 401 +               /* default options */
 402 +               options.preset = 6;
 403 +               options.extreme = 0;
 404 +               options.lc = LZMA_OPT_LC_DEFAULT;
 405 +               options.lp = LZMA_OPT_LC_DEFAULT;
 406 +               options.pb = LZMA_OPT_PB_DEFAULT;
 407 +               options.fb = LZMA_OPT_FB_DEFAULT;
 408 +               options.dict_size = block_size;
 409 +               options.flags = 0;
 410 +       } else {
 411 +               struct lzma_opts *comp_opts = buffer;
 412 +               int n;
 413 +
 414 +               if (size != sizeof(struct lzma_opts))
 415 +                       goto failed;
 416 +
 417 +               SQUASHFS_INSWAP_LZMA_COMP_OPTS(&comp_opts);
 418 +
 419 +               options.flags = comp_opts->flags & LZMA_OPT_FLT_MASK;
 420 +               options.preset  = (comp_opts->flags & LZMA_OPT_PRE_MASK) >> LZMA_OPT_PRE_OFF;
 421 +               options.extreme = !!(comp_opts->flags & LZMA_OPT_EXTREME);
 422 +
 423 +               options.lc = (comp_opts->bit_opts & LZMA_OPT_LC_MASK) >> LZMA_OPT_LC_OFF;
 424 +               options.lp = (comp_opts->bit_opts & LZMA_OPT_LP_MASK) >> LZMA_OPT_LP_OFF;
 425 +               options.pb = (comp_opts->bit_opts & LZMA_OPT_PB_MASK) >> LZMA_OPT_PB_OFF;
 426 +               options.fb = comp_opts->fb;
 427 +               options.dict_size = comp_opts->dict_size;
 428 +
 429 +               /* check that the LZMA bit options are in range */
 430 +               if (options.lc < LZMA_OPT_LC_MIN || options.lc > LZMA_OPT_LC_MAX ||
 431 +                       options.lp < LZMA_OPT_LP_MIN || options.lp > LZMA_OPT_LP_MAX ||
 432 +                       options.pb < LZMA_OPT_PB_MIN || options.pb > LZMA_OPT_PB_MAX ||
 433 +                       options.fb < LZMA_OPT_FB_MIN || options.fb > LZMA_OPT_FB_MAX)
 434 +                       goto failed;
 435 +
 436 +               /*
 437 +                * check that the dictionary size seems correct - the dictionary
 438 +                * size should 2^n or 2^n+2^(n+1)
 439 +                */
 440 +               n = ffs(options.dict_size) - 1;
 441 +               if(options.dict_size != (1 << n) &&
 442 +                               options.dict_size != ((1 << n) + (1 << (n + 1))))
 443 +                       goto failed;
 444 +
 445 +       }
 446 +
 447 +       return 0;
 448 +
 449 +failed:
 450 +       fprintf(stderr, "%s: error reading stored compressor options from "
 451 +               "filesystem!\n", lzmaver_str[lzmaver]);
 452 +       return -1;
 453 +}
 454 +
 455 +void lzma_xz_usage(int lzmaver)
 456 +{
 457 +       fprintf(stderr, "\t  -Xpreset <preset>\n");
 458 +       fprintf(stderr, "\t\tcompression preset (0-9, default 6)\n");
 459 +       fprintf(stderr, "\t  -Xe\n");
 460 +       fprintf(stderr, "\t\tTry to improve compression ratio by using more ");
 461 +       fprintf(stderr, "CPU time.\n");
 462 +       fprintf(stderr, "\t  -Xlc <lc>\n");
 463 +       fprintf(stderr, "\t\tNumber of literal context bits (0-4, default 3)\n");
 464 +       fprintf(stderr, "\t  -Xlp <lp>\n");
 465 +       fprintf(stderr, "\t\tNumber of literal position bits (0-4, default 0)\n");
 466 +       fprintf(stderr, "\t  -Xpb <pb>\n");
 467 +       fprintf(stderr, "\t\tNumber of position bits (0-4, default 2)\n");
 468 +       fprintf(stderr, "\t  -Xnice <nice>\n");
 469 +       fprintf(stderr, "\t\tNice length of a match (5-273, default 64)\n");
 470 +       fprintf(stderr, "\t  -Xdict-size <dict-size>\n");
 471 +       fprintf(stderr, "\t\tUse <dict-size> as the %s dictionary size.  The",
 472 +                       lzmaver == LZMA_OPT_LZMA ? "LZMA" : "XZ");
 473 +       fprintf(stderr, " dictionary size\n\t\tcan be specified as a");
 474 +       fprintf(stderr, " percentage of the block size, or as an\n\t\t");
 475 +       fprintf(stderr, "absolute value.  The dictionary size must be less");
 476 +       fprintf(stderr, " than or equal\n\t\tto the block size and %d bytes",
 477 +                       lzmaver == LZMA_OPT_LZMA ? 4096 : 8192);
 478 +       fprintf(stderr, " or larger.  It must also be\n\t\tstorable in the lzma");
 479 +       fprintf(stderr, " header as either 2^n or as 2^n+2^(n+1).\n\t\t");
 480 +       fprintf(stderr, "Example dict-sizes are 75%%, 50%%, 37.5%%, 25%%, or");
 481 +       fprintf(stderr, " 32K, 16K, 8K\n\t\tetc.\n");
 482 +
 483 +}
 484 --- a/squashfs-tools/lzma_xz_wrapper.c
 485 +++ b/squashfs-tools/lzma_xz_wrapper.c
 486 @@ -27,6 +27,7 @@
 487
 488  #include "squashfs_fs.h"
 489  #include "compressor.h"
 490 +#include "lzma_xz_options.h"
 491
 492  #define LZMA_PROPS_SIZE 5
 493  #define LZMA_UNCOMP_SIZE 8
 494 @@ -38,13 +39,27 @@
 495  static int lzma_compress(void *dummy, void *dest, void *src,  int size,
 496         int block_size, int *error)
 497  {
 498 +       uint32_t preset;
 499         unsigned char *d = (unsigned char *) dest;
 500 +       struct lzma_xz_options *opts = lzma_xz_get_options();
 501 +
 502         lzma_options_lzma opt;
 503         lzma_stream strm = LZMA_STREAM_INIT;
 504         int res;
 505
 506 -       lzma_lzma_preset(&opt, LZMA_OPTIONS);
 507 -       opt.dict_size = block_size;
 508 +       preset = opts->preset;
 509 +
 510 +       if (opts->extreme)
 511 +               preset |= LZMA_PRESET_EXTREME;
 512 +
 513 +       lzma_lzma_preset(&opt, opts->preset);
 514 +       opt.lc = opts->lc;
 515 +       opt.lp = opts->lp;
 516 +       opt.pb = opts->pb;
 517 +       if (opts->fb)
 518 +               opt.nice_len = opts->fb;
 519 +
 520 +       opt.dict_size = opts->dict_size;
 521
 522         res = lzma_alone_encoder(&strm, &opt);
 523         if(res != LZMA_OK) {
 524 @@ -143,13 +158,45 @@ failed:
 525         return -1;
 526  }
 527
 528 +static int lzma_options(char *argv[], int argc)
 529 +{
 530 +       return lzma_xz_options(argv, argc, LZMA_OPT_LZMA);
 531 +}
 532 +
 533 +
 534 +static int lzma_options_post(int block_size)
 535 +{
 536 +       return lzma_xz_options_post(block_size, LZMA_OPT_LZMA);
 537 +}
 538 +
 539 +
 540 +static void *lzma_dump_options(int block_size, int *size)
 541 +{
 542 +       return lzma_xz_dump_options(block_size, size, 0);
 543 +}
 544 +
 545 +
 546 +static int lzma_extract_options(int block_size, void *buffer, int size)
 547 +{
 548 +       return lzma_xz_extract_options(block_size, buffer, size, LZMA_OPT_LZMA);
 549 +}
 550 +
 551 +
 552 +void lzma_usage()
 553 +{
 554 +       lzma_xz_usage(LZMA_OPT_LZMA);
 555 +}
 556 +
 557
 558  struct compressor lzma_comp_ops = {
 559         .init = NULL,
 560         .compress = lzma_compress,
 561         .uncompress = lzma_uncompress,
 562 -       .options = NULL,
 563 -       .usage = NULL,
 564 +       .options = lzma_options,
 565 +       .options_post = lzma_options_post,
 566 +       .dump_options = lzma_dump_options,
 567 +       .extract_options = lzma_extract_options,
 568 +       .usage = lzma_usage,
 569         .id = LZMA_COMPRESSION,
 570         .name = "lzma",
 571         .supported = 1
 572 --- a/squashfs-tools/xz_wrapper.h
 573 +++ b/squashfs-tools/xz_wrapper.h
 574 @@ -24,25 +24,6 @@
 575   *
 576   */
 577
 578 -#ifndef linux
 579 -#define __BYTE_ORDER BYTE_ORDER
 580 -#define __BIG_ENDIAN BIG_ENDIAN
 581 -#define __LITTLE_ENDIAN LITTLE_ENDIAN
 582 -#else
 583 -#include <endian.h>
 584 -#endif
 585 -
 586 -#if __BYTE_ORDER == __BIG_ENDIAN
 587 -extern unsigned int inswap_le32(unsigned int);
 588 -
 589 -#define SQUASHFS_INSWAP_COMP_OPTS(s) { \
 590 -       (s)->dictionary_size = inswap_le32((s)->dictionary_size); \
 591 -       (s)->flags = inswap_le32((s)->flags); \
 592 -}
 593 -#else
 594 -#define SQUASHFS_INSWAP_COMP_OPTS(s)
 595 -#endif
 596 -
 597  #define MEMLIMIT (32 * 1024 * 1024)
 598
 599  struct bcj {
 600 --- a/squashfs-tools/xz_wrapper.c
 601 +++ b/squashfs-tools/xz_wrapper.c
 602 @@ -30,6 +30,7 @@
 603  #include "squashfs_fs.h"
 604  #include "xz_wrapper.h"
 605  #include "compressor.h"
 606 +#include "lzma_xz_options.h"
 607
 608  static struct bcj bcj[] = {
 609         { "x86", LZMA_FILTER_X86, 0 },
 610 @@ -41,22 +42,18 @@ static struct bcj bcj[] = {
 611         { NULL, LZMA_VLI_UNKNOWN, 0 }
 612  };
 613
 614 -static struct comp_opts comp_opts;
 615 -
 616  static int filter_count = 1;
 617 -static int dictionary_size = 0;
 618 -static float dictionary_percent = 0;
 619
 620
 621  static int xz_options(char *argv[], int argc)
 622  {
 623 -       int i;
 624 -       char *name;
 625 -
 626         if(strcmp(argv[0], "-Xbcj") == 0) {
 627 +               int i;
 628 +               char *name;
 629 +
 630                 if(argc < 2) {
 631                         fprintf(stderr, "xz: -Xbcj missing filter\n");
 632 -                       goto failed;
 633 +                       return -2;
 634                 }
 635
 636                 name = argv[1];
 637 @@ -76,190 +73,50 @@ static int xz_options(char *argv[], int
 638                         }
 639                         if(bcj[i].name == NULL) {
 640                                 fprintf(stderr, "xz: -Xbcj unrecognised "
 641 -                                       "filter\n");
 642 -                               goto failed;
 643 -                       }
 644 -               }
 645 -
 646 -               return 1;
 647 -       } else if(strcmp(argv[0], "-Xdict-size") == 0) {
 648 -               char *b;
 649 -               float size;
 650 -
 651 -               if(argc < 2) {
 652 -                       fprintf(stderr, "xz: -Xdict-size missing dict-size\n");
 653 -                       goto failed;
 654 -               }
 655 -
 656 -               size = strtof(argv[1], &b);
 657 -               if(*b == '%') {
 658 -                       if(size <= 0 || size > 100) {
 659 -                               fprintf(stderr, "xz: -Xdict-size percentage "
 660 -                                       "should be 0 < dict-size <= 100\n");
 661 -                               goto failed;
 662 -                       }
 663 -
 664 -                       dictionary_percent = size;
 665 -                       dictionary_size = 0;
 666 -               } else {
 667 -                       if((float) ((int) size) != size) {
 668 -                               fprintf(stderr, "xz: -Xdict-size can't be "
 669 -                                       "fractional unless a percentage of the"
 670 -                                       " block size\n");
 671 -                               goto failed;
 672 -                       }
 673 -
 674 -                       dictionary_percent = 0;
 675 -                       dictionary_size = (int) size;
 676 -
 677 -                       if(*b == 'k' || *b == 'K')
 678 -                               dictionary_size *= 1024;
 679 -                       else if(*b == 'm' || *b == 'M')
 680 -                               dictionary_size *= 1024 * 1024;
 681 -                       else if(*b != '\0') {
 682 -                               fprintf(stderr, "xz: -Xdict-size invalid "
 683 -                                       "dict-size\n");
 684 -                               goto failed;
 685 +                                               "filter\n");
 686 +                               return -2;
 687                         }
 688                 }
 689 -
 690                 return 1;
 691 +       } else {
 692 +               return lzma_xz_options(argv, argc, LZMA_OPT_XZ);
 693         }
 694 -
 695 -       return -1;
 696 -
 697 -failed:
 698 -       return -2;
 699  }
 700
 701
 702  static int xz_options_post(int block_size)
 703  {
 704 -       /*
 705 -        * if -Xdict-size has been specified use this to compute the datablock
 706 -        * dictionary size
 707 -        */
 708 -       if(dictionary_size || dictionary_percent) {
 709 -               int n;
 710 -
 711 -               if(dictionary_size) {
 712 -                       if(dictionary_size > block_size) {
 713 -                               fprintf(stderr, "xz: -Xdict-size is larger than"
 714 -                               " block_size\n");
 715 -                               goto failed;
 716 -                       }
 717 -               } else
 718 -                       dictionary_size = block_size * dictionary_percent / 100;
 719 -
 720 -               if(dictionary_size < 8192) {
 721 -                       fprintf(stderr, "xz: -Xdict-size should be 8192 bytes "
 722 -                               "or larger\n");
 723 -                       goto failed;
 724 -               }
 725 -
 726 -               /*
 727 -                * dictionary_size must be storable in xz header as either
 728 -                * 2^n or as  2^n+2^(n+1)
 729 -               */
 730 -               n = ffs(dictionary_size) - 1;
 731 -               if(dictionary_size != (1 << n) &&
 732 -                               dictionary_size != ((1 << n) + (1 << (n + 1)))) {
 733 -                       fprintf(stderr, "xz: -Xdict-size is an unsupported "
 734 -                               "value, dict-size must be storable in xz "
 735 -                               "header\n");
 736 -                       fprintf(stderr, "as either 2^n or as 2^n+2^(n+1).  "
 737 -                               "Example dict-sizes are 75%%, 50%%, 37.5%%, "
 738 -                               "25%%,\n");
 739 -                       fprintf(stderr, "or 32K, 16K, 8K etc.\n");
 740 -                       goto failed;
 741 -               }
 742 -
 743 -       } else
 744 -               /* No -Xdict-size specified, use defaults */
 745 -               dictionary_size = block_size;
 746 -
 747 -       return 0;
 748 -
 749 -failed:
 750 -       return -1;
 751 +       return lzma_xz_options_post(block_size, LZMA_OPT_XZ);
 752  }
 753
 754
 755  static void *xz_dump_options(int block_size, int *size)
 756  {
 757 -       int flags = 0, i;
 758 -
 759 -       /*
 760 -        * don't store compressor specific options in file system if the
 761 -        * default options are being used - no compressor options in the
 762 -        * file system means the default options are always assumed
 763 -        *
 764 -        * Defaults are:
 765 -        *  metadata dictionary size: SQUASHFS_METADATA_SIZE
 766 -        *  datablock dictionary size: block_size
 767 -        *  1 filter
 768 -        */
 769 -       if(dictionary_size == block_size && filter_count == 1)
 770 -               return NULL;
 771 +       int i, flags = 0;
 772
 773         for(i = 0; bcj[i].name; i++)
 774                 flags |= bcj[i].selected << i;
 775
 776 -       comp_opts.dictionary_size = dictionary_size;
 777 -       comp_opts.flags = flags;
 778 -
 779 -       SQUASHFS_INSWAP_COMP_OPTS(&comp_opts);
 780 -
 781 -       *size = sizeof(comp_opts);
 782 -       return &comp_opts;
 783 +       return lzma_xz_dump_options(block_size, size, flags);
 784  }
 785
 786
 787  static int xz_extract_options(int block_size, void *buffer, int size)
 788  {
 789 -       struct comp_opts *comp_opts = buffer;
 790 -       int flags, i, n;
 791 -
 792 -       if(size == 0) {
 793 -               /* set defaults */
 794 -               dictionary_size = block_size;
 795 -               flags = 0;
 796 -       } else {
 797 -               /* check passed comp opts struct is of the correct length */
 798 -               if(size != sizeof(struct comp_opts))
 799 -                       goto failed;
 800 -
 801 -               SQUASHFS_INSWAP_COMP_OPTS(comp_opts);
 802 -
 803 -               dictionary_size = comp_opts->dictionary_size;
 804 -               flags = comp_opts->flags;
 805 -
 806 -               /*
 807 -                * check that the dictionary size seems correct - the dictionary
 808 -                * size should 2^n or 2^n+2^(n+1)
 809 -                */
 810 -               n = ffs(dictionary_size) - 1;
 811 -               if(dictionary_size != (1 << n) &&
 812 -                               dictionary_size != ((1 << n) + (1 << (n + 1))))
 813 -                       goto failed;
 814 -       }
 815 +       int ret = lzma_xz_extract_options(block_size, buffer, size, LZMA_OPT_XZ);
 816
 817 -       filter_count = 1;
 818 -       for(i = 0; bcj[i].name; i++) {
 819 -               if((flags >> i) & 1) {
 820 -                       bcj[i].selected = 1;
 821 -                       filter_count ++;
 822 -               } else
 823 -                       bcj[i].selected = 0;
 824 +       if (!ret) {
 825 +               int i;
 826 +               struct lzma_xz_options *opts = lzma_xz_get_options();
 827 +               for(i = 0; bcj[i].name; i++) {
 828 +                       if((opts->flags >> i) & 1) {
 829 +                               bcj[i].selected = 1;
 830 +                               filter_count ++;
 831 +                       } else
 832 +                               bcj[i].selected = 0;
 833 +               }
 834         }
 835 -
 836 -       return 0;
 837 -
 838 -failed:
 839 -       fprintf(stderr, "xz: error reading stored compressor options from "
 840 -               "filesystem!\n");
 841 -
 842 -       return -1;
 843 +       return ret;
 844  }
 845
 846
 847 @@ -268,6 +125,7 @@ static int xz_init(void **strm, int bloc
 848         int i, j, filters = datablock ? filter_count : 1;
 849         struct filter *filter = malloc(filters * sizeof(struct filter));
 850         struct xz_stream *stream;
 851 +       struct lzma_xz_options *opts = lzma_xz_get_options();
 852
 853         if(filter == NULL)
 854                 goto failed;
 855 @@ -281,7 +139,7 @@ static int xz_init(void **strm, int bloc
 856
 857         memset(filter, 0, filters * sizeof(struct filter));
 858
 859 -       stream->dictionary_size = datablock ? dictionary_size :
 860 +       stream->dictionary_size = datablock ? opts->dict_size :
 861                 SQUASHFS_METADATA_SIZE;
 862
 863         filter[0].filter[0].id = LZMA_FILTER_LZMA2;
 864 @@ -323,14 +181,25 @@ static int xz_compress(void *strm, void
 865          lzma_ret res = 0;
 866         struct xz_stream *stream = strm;
 867         struct filter *selected = NULL;
 868 +       struct lzma_xz_options *opts = lzma_xz_get_options();
 869
 870         stream->filter[0].buffer = dest;
 871
 872         for(i = 0; i < stream->filters; i++) {
 873 +               uint32_t preset = opts->preset;
 874                 struct filter *filter = &stream->filter[i];
 875
 876 -               if(lzma_lzma_preset(&stream->opt, LZMA_PRESET_DEFAULT))
 877 -                       goto failed;
 878 +               if (opts->extreme)
 879 +                       preset |= LZMA_PRESET_EXTREME;
 880 +
 881 +        if(lzma_lzma_preset(&stream->opt, preset))
 882 +                       goto failed;
 883 +
 884 +        stream->opt.lc = opts->lc;
 885 +       stream->opt.lp = opts->lp;
 886 +       stream->opt.pb = opts->pb;
 887 +       if (opts->fb)
 888 +               stream->opt.nice_len = opts->fb;
 889
 890                 stream->opt.dict_size = stream->dictionary_size;
 891
 892 @@ -384,22 +253,13 @@ static int xz_uncompress(void *dest, voi
 893
 894  void xz_usage()
 895  {
 896 +       lzma_xz_usage(LZMA_OPT_XZ);
 897         fprintf(stderr, "\t  -Xbcj filter1,filter2,...,filterN\n");
 898         fprintf(stderr, "\t\tCompress using filter1,filter2,...,filterN in");
 899         fprintf(stderr, " turn\n\t\t(in addition to no filter), and choose");
 900         fprintf(stderr, " the best compression.\n");
 901         fprintf(stderr, "\t\tAvailable filters: x86, arm, armthumb,");
 902         fprintf(stderr, " powerpc, sparc, ia64\n");
 903 -       fprintf(stderr, "\t  -Xdict-size <dict-size>\n");
 904 -       fprintf(stderr, "\t\tUse <dict-size> as the XZ dictionary size.  The");
 905 -       fprintf(stderr, " dictionary size\n\t\tcan be specified as a");
 906 -       fprintf(stderr, " percentage of the block size, or as an\n\t\t");
 907 -       fprintf(stderr, "absolute value.  The dictionary size must be less");
 908 -       fprintf(stderr, " than or equal\n\t\tto the block size and 8192 bytes");
 909 -       fprintf(stderr, " or larger.  It must also be\n\t\tstorable in the xz");
 910 -       fprintf(stderr, " header as either 2^n or as 2^n+2^(n+1).\n\t\t");
 911 -       fprintf(stderr, "Example dict-sizes are 75%%, 50%%, 37.5%%, 25%%, or");
 912 -       fprintf(stderr, " 32K, 16K, 8K\n\t\tetc.\n");
 913  }
 914
 915
 916 --- a/squashfs-tools/Makefile
 917 +++ b/squashfs-tools/Makefile
 918 @@ -140,6 +140,8 @@ COMPRESSORS += xz
 919  endif
 920
 921  ifneq ($(LZMA_XZ_SUPPORT)$(XZ_SUPPORT),)
 922 +MKSQUASHFS_OBJS += lzma_xz_options.o
 923 +UNSQUASHFS_OBJS += lzma_xz_options.o
 924  ifneq ($(LZMA_LIB),)
 925  MKSQUASHFS_OBJS += $(LZMA_LIB)
 926  UNSQUASHFS_OBJS += $(LZMA_LIB)