wimlib.net Git - wimlib/blob - src/join.c

   1 /*
   2  * join.c
   3  *
   4  * Join split WIMs (sometimes named as .swm files) together into one WIM.
   5  */
   6
   7 /*
   8  * Copyright (C) 2012, 2013 Eric Biggers
   9  *
  10  * This file is part of wimlib, a library for working with WIM files.
  11  *
  12  * wimlib is free software; you can redistribute it and/or modify it under the
  13  * terms of the GNU General Public License as published by the Free
  14  * Software Foundation; either version 3 of the License, or (at your option)
  15  * any later version.
  16  *
  17  * wimlib is distributed in the hope that it will be useful, but WITHOUT ANY
  18  * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
  19  * A PARTICULAR PURPOSE. See the GNU General Public License for more
  20  * details.
  21  *
  22  * You should have received a copy of the GNU General Public License
  23  * along with wimlib; if not, see http://www.gnu.org/licenses/.
  24  */
  25
  26 #include "wimlib_internal.h"
  27 #include "lookup_table.h"
  28 #include "xml.h"
  29 #include <stdlib.h>
  30
  31 static int move_lte_to_table(struct wim_lookup_table_entry *lte,
  32                              void *other_tab)
  33 {
  34         hlist_del(&lte->hash_list);
  35         lookup_table_insert((struct wim_lookup_table*)other_tab, lte);
  36         return 0;
  37 }
  38
  39 static int lookup_table_join(struct wim_lookup_table *table,
  40                              struct wim_lookup_table *new)
  41 {
  42         return for_lookup_table_entry(new, move_lte_to_table, table);
  43 }
  44
  45 /*
  46  * new_joined_lookup_table: - Join lookup tables from the parts of a split WIM.
  47  *
  48  * @w specifies the first part, while @additional_swms and @num_additional_swms
  49  * specify an array of pointers to the WIMStruct's for additional split WIM parts.
  50  *
  51  * The lookup table entries are *moved* to the new table.
  52  *
  53  * On success, 0 is returned on a pointer to the joined lookup table is returned
  54  * in @table_ret.
  55  *
  56  * The reason we join the lookup tables is so we only have to search one lookup
  57  * table to find the location of a resource in the entire WIM.
  58  */
  59 int new_joined_lookup_table(WIMStruct *w,
  60                             WIMStruct **additional_swms,
  61                             unsigned num_additional_swms,
  62                             struct wim_lookup_table **table_ret)
  63 {
  64         struct wim_lookup_table *table;
  65         int ret;
  66         unsigned i;
  67
  68         table = new_lookup_table(9001);
  69         if (!table)
  70                 return WIMLIB_ERR_NOMEM;
  71
  72         if (w)
  73                 lookup_table_join(table, w->lookup_table);
  74
  75         for (i = 0; i < num_additional_swms; i++) {
  76                 ret = lookup_table_join(table, additional_swms[i]->lookup_table);
  77                 if (ret != 0)
  78                         goto out_free_table;
  79         }
  80         *table_ret = table;
  81         return 0;
  82 out_free_table:
  83         free_lookup_table(table);
  84         return ret;
  85 }
  86
  87
  88 static int join_wims(WIMStruct **swms, unsigned num_swms,
  89                      WIMStruct *joined_wim, int write_flags,
  90                      wimlib_progress_func_t progress_func)
  91 {
  92         int ret;
  93         unsigned i;
  94         union wimlib_progress_info progress;
  95         u64 total_bytes = 0;
  96         u64 part_bytes;
  97         u64 swm_part_sizes[num_swms];
  98
  99         /* Calculate total size of the streams in the split WIM parts. */
 100         for (i = 0; i < num_swms; i++) {
 101                 part_bytes = lookup_table_total_stream_size(swms[i]->lookup_table);
 102                 swm_part_sizes[i] = part_bytes;
 103                 total_bytes += part_bytes;
 104         }
 105
 106         if (progress_func) {
 107                 progress.join.total_bytes        = total_bytes;
 108                 progress.join.total_parts        = swms[0]->hdr.total_parts;
 109                 progress.join.completed_bytes    = 0;
 110                 progress.join.completed_parts    = 0;
 111                 progress_func(WIMLIB_PROGRESS_MSG_JOIN_STREAMS, &progress);
 112         }
 113
 114         /* Write the resources (streams and metadata resources) from each SWM
 115          * part */
 116         swms[0]->write_metadata = true;
 117         for (i = 0; i < num_swms; i++) {
 118                 swms[i]->fp = fopen(swms[i]->filename, "rb");
 119                 if (!swms[i]->fp) {
 120                         ERROR_WITH_ERRNO("Failed to reopen `%s'",
 121                                          swms[i]->filename);
 122                         return WIMLIB_ERR_OPEN;
 123                 }
 124                 swms[i]->out_fp = joined_wim->out_fp;
 125                 swms[i]->hdr.part_number = 1;
 126                 ret = for_lookup_table_entry(swms[i]->lookup_table,
 127                                              copy_resource, swms[i]);
 128                 swms[i]->out_fp = NULL;
 129                 fclose(swms[i]->fp);
 130                 swms[i]->fp = NULL;
 131
 132                 if (ret != 0)
 133                         return ret;
 134
 135                 if (progress_func) {
 136                         progress.join.completed_bytes += swm_part_sizes[i];
 137                         progress.join.completed_parts++;
 138                         progress_func(WIMLIB_PROGRESS_MSG_JOIN_STREAMS, &progress);
 139                 }
 140         }
 141
 142         joined_wim->hdr.image_count = swms[0]->hdr.image_count;
 143         for (i = 0; i < num_swms; i++)
 144                 lookup_table_join(joined_wim->lookup_table, swms[i]->lookup_table);
 145
 146         free_wim_info(joined_wim->wim_info);
 147         joined_wim->wim_info = swms[0]->wim_info;
 148         ret = finish_write(joined_wim, WIMLIB_ALL_IMAGES, write_flags, progress_func);
 149         joined_wim->wim_info = NULL;
 150         return ret;
 151 }
 152
 153 static int cmp_swms_by_part_number(const void *swm1, const void *swm2)
 154 {
 155         u16 partno_1 = (*(const WIMStruct**)swm1)->hdr.part_number;
 156         u16 partno_2 = (*(const WIMStruct**)swm2)->hdr.part_number;
 157         return (int)partno_1 - (int)partno_2;
 158 }
 159
 160 /*
 161  * Join a set of split WIMs into a stand-alone WIM.
 162  */
 163 WIMLIBAPI int wimlib_join(const char * const *swm_names, unsigned num_swms,
 164                           const char *output_path, int swm_open_flags,
 165                           int wim_write_flags,
 166                           wimlib_progress_func_t progress_func)
 167 {
 168         int ret;
 169         WIMStruct *joined_wim = NULL;
 170         unsigned i;
 171
 172         swm_open_flags |= WIMLIB_OPEN_FLAG_SPLIT_OK;
 173         wim_write_flags &= WIMLIB_WRITE_MASK_PUBLIC;
 174
 175         if (num_swms < 1 || num_swms > 0xffff)
 176                 return WIMLIB_ERR_INVALID_PARAM;
 177
 178         WIMStruct *swms[num_swms];
 179         ZERO_ARRAY(swms);
 180
 181         for (i = 0; i < num_swms; i++) {
 182                 ret = wimlib_open_wim(swm_names[i], swm_open_flags, &swms[i],
 183                                       progress_func);
 184                 if (ret != 0)
 185                         goto out;
 186
 187                 /* Don't open all the parts at the same time, in case there are
 188                  * a lot of them */
 189                 fclose(swms[i]->fp);
 190                 swms[i]->fp = NULL;
 191         }
 192
 193         qsort(swms, num_swms, sizeof(swms[0]), cmp_swms_by_part_number);
 194
 195         ret = verify_swm_set(swms[0], &swms[1], num_swms - 1);
 196         if (ret != 0)
 197                 goto out;
 198
 199         ret = wimlib_create_new_wim(wimlib_get_compression_type(swms[0]),
 200                                     &joined_wim);
 201         if (ret != 0)
 202                 goto out;
 203
 204         ret = begin_write(joined_wim, output_path, wim_write_flags);
 205         if (ret != 0)
 206                 goto out;
 207         ret = join_wims(swms, num_swms, joined_wim, wim_write_flags,
 208                         progress_func);
 209 out:
 210         for (i = 0; i < num_swms; i++)
 211                 wimlib_free(swms[i]);
 212         wimlib_free(joined_wim);
 213         return ret;
 214 }