tools/squashfs4/patches/130-dynamic_lzma_params.patch

   1 --- a/squashfs-tools/lzma_wrapper.c
   2 +++ b/squashfs-tools/lzma_wrapper.c
   3 @@ -20,6 +20,8 @@
   4   */
   5
   6  #include <LzmaLib.h>
   7 +#include <stdio.h>
   8 +#include "compressor.h"
   9
  10  #define LZMA_HEADER_SIZE       (LZMA_PROPS_SIZE + 8)
  11
  12 @@ -30,9 +32,18 @@
  13         size_t props_size = LZMA_PROPS_SIZE,
  14                 outlen = block_size - LZMA_HEADER_SIZE;
  15         int res;
  16 +       int lc;
  17 +       int lp;
  18 +       int pb;
  19 +
  20 +       if (!comp_args || sscanf(comp_args, "%d:%d:%d", &lc, &lp, &pb) != 3) {
  21 +               lc = 0;
  22 +               lp = 2;
  23 +               pb = 2;
  24 +       }
  25
  26         res = LzmaCompress(d + LZMA_HEADER_SIZE, &outlen, s, size, d,
  27 -               &props_size, 5, block_size, 3, 0, 2, 32, 1);
  28 +               &props_size, 5, block_size, lc, lp, pb, 32, 1);
  29
  30         if(res == SZ_ERROR_OUTPUT_EOF) {
  31                 /*
  32 --- a/squashfs-tools/compressor.c
  33 +++ b/squashfs-tools/compressor.c
  34 @@ -25,6 +25,7 @@
  35  #include "compressor.h"
  36  #include "squashfs_fs.h"
  37
  38 +char *comp_args = NULL;
  39  extern int gzip_compress(void **, char *, char *, int, int, int *);
  40  extern int gzip_uncompress(char *, char *, int, int, int *);
  41  extern int lzma_compress(void **, char *, char *, int, int, int *);
  42 --- a/squashfs-tools/compressor.h
  43 +++ b/squashfs-tools/compressor.h
  44 @@ -31,3 +31,4 @@
  45  extern struct compressor *lookup_compressor(char *);
  46  extern struct compressor *lookup_compressor_id(int);
  47  extern void display_compressors(char *, char *);
  48 +extern char *comp_args;
  49 --- a/squashfs-tools/mksquashfs.c
  50 +++ b/squashfs-tools/mksquashfs.c
  51 @@ -4355,6 +4355,12 @@
  52                                 exit(1);
  53                         }
  54                         comp_name = argv[i];
  55 +               } else if(strcmp(argv[i], "-comp_args") == 0) {
  56 +                       if(++i == argc) {
  57 +                               ERROR("%s: -comp_args missing compression arguments\n", argv[0]);
  58 +                               exit(1);
  59 +                       }
  60 +                       comp_args = argv[i];
  61                 } else if(strcmp(argv[i], "-pf") == 0) {
  62                         if(++i == argc) {
  63                                 ERROR("%s: -pf missing filename\n", argv[0]);
  64 @@ -4574,6 +4580,7 @@
  65                                 "[-e list of exclude\ndirs/files]\n", argv[0]);
  66                         ERROR("\nFilesystem build options:\n");
  67                         ERROR("-comp <comp>\t\tselect <comp> compression\n");
  68 +                       ERROR("-comp_args <comp>\t\tselect compression arguments\n");
  69                         ERROR("\t\t\tCompressors available:\n");
  70                         display_compressors("\t\t\t", COMP_DEFAULT);
  71                         ERROR("-b <block_size>\t\tset data block to "
  72 @@ -4736,7 +4743,8 @@
  73                 else if(strcmp(argv[i], "-root-becomes") == 0 ||
  74                                 strcmp(argv[i], "-sort") == 0 ||
  75                                 strcmp(argv[i], "-pf") == 0 ||
  76 -                               strcmp(argv[i], "-comp") == 0)
  77 +                               strcmp(argv[i], "-comp") == 0 ||
  78 +                               strcmp(argv[i], "-comp_args") == 0)
  79                         i++;
  80
  81         if(i != argc) {
  82 @@ -4761,7 +4769,8 @@
  83                 else if(strcmp(argv[i], "-root-becomes") == 0 ||
  84                                 strcmp(argv[i], "-ef") == 0 ||
  85                                 strcmp(argv[i], "-pf") == 0 ||
  86 -                               strcmp(argv[i], "-comp") == 0)
  87 +                               strcmp(argv[i], "-comp") == 0 ||
  88 +                               strcmp(argv[i], "-comp_args") == 0)
  89                         i++;
  90
  91  #ifdef SQUASHFS_TRACE