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
  32 move_lte_to_table(struct wim_lookup_table_entry *lte, 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
  40 lookup_table_join(struct wim_lookup_table *table,
  41                   struct wim_lookup_table *new)
  42 {
  43         return for_lookup_table_entry(new, move_lte_to_table, table);
  44 }
  45
  46 /*
  47  * new_joined_lookup_table: - Join lookup tables from the parts of a split WIM.
  48  *
  49  * @w specifies the first part, while @additional_swms and @num_additional_swms
  50  * specify an array of pointers to the WIMStruct's for additional split WIM parts.
  51  *
  52  * The lookup table entries are *moved* to the new table.
  53  *
  54  * On success, 0 is returned on a pointer to the joined lookup table is returned
  55  * in @table_ret.
  56  *
  57  * The reason we join the lookup tables is so we only have to search one lookup
  58  * table to find the location of a resource in the entire WIM.
  59  */
  60 int
  61 new_joined_lookup_table(WIMStruct *w,
  62                         WIMStruct **additional_swms,
  63                         unsigned num_additional_swms,
  64                         struct wim_lookup_table **table_ret)
  65 {
  66         struct wim_lookup_table *table;
  67         int ret;
  68         unsigned i;
  69
  70         table = new_lookup_table(9001);
  71         if (!table)
  72                 return WIMLIB_ERR_NOMEM;
  73
  74         if (w)
  75                 lookup_table_join(table, w->lookup_table);
  76
  77         for (i = 0; i < num_additional_swms; i++) {
  78                 ret = lookup_table_join(table, additional_swms[i]->lookup_table);
  79                 if (ret != 0)
  80                         goto out_free_table;
  81         }
  82         *table_ret = table;
  83         return 0;
  84 out_free_table:
  85         free_lookup_table(table);
  86         return ret;
  87 }
  88
  89
  90 static int
  91 join_wims(WIMStruct **swms, unsigned num_swms,
  92           WIMStruct *joined_wim, int write_flags,
  93           wimlib_progress_func_t progress_func)
  94 {
  95         int ret;
  96         unsigned i;
  97         union wimlib_progress_info progress;
  98         u64 total_bytes = 0;
  99         u64 part_bytes;
 100         u64 swm_part_sizes[num_swms];
 101
 102         /* Calculate total size of the streams in the split WIM parts. */
 103         for (i = 0; i < num_swms; i++) {
 104                 part_bytes = lookup_table_total_stream_size(swms[i]->lookup_table);
 105                 swm_part_sizes[i] = part_bytes;
 106                 total_bytes += part_bytes;
 107         }
 108
 109         if (progress_func) {
 110                 progress.join.total_bytes        = total_bytes;
 111                 progress.join.total_parts        = swms[0]->hdr.total_parts;
 112                 progress.join.completed_bytes    = 0;
 113                 progress.join.completed_parts    = 0;
 114                 progress_func(WIMLIB_PROGRESS_MSG_JOIN_STREAMS, &progress);
 115         }
 116
 117         /* Write the resources (streams and metadata resources) from each SWM
 118          * part */
 119         swms[0]->write_metadata = true;
 120         for (i = 0; i < num_swms; i++) {
 121                 swms[i]->fp = tfopen(swms[i]->filename, T("rb"));
 122                 if (!swms[i]->fp) {
 123                         ERROR_WITH_ERRNO("Failed to reopen `%"TS"'",
 124                                          swms[i]->filename);
 125                         return WIMLIB_ERR_OPEN;
 126                 }
 127                 swms[i]->out_fp = joined_wim->out_fp;
 128                 swms[i]->hdr.part_number = 1;
 129                 ret = for_lookup_table_entry(swms[i]->lookup_table,
 130                                              copy_resource, swms[i]);
 131                 swms[i]->out_fp = NULL;
 132                 fclose(swms[i]->fp);
 133                 swms[i]->fp = NULL;
 134
 135                 if (ret != 0)
 136                         return ret;
 137
 138                 if (progress_func) {
 139                         progress.join.completed_bytes += swm_part_sizes[i];
 140                         progress.join.completed_parts++;
 141                         progress_func(WIMLIB_PROGRESS_MSG_JOIN_STREAMS, &progress);
 142                 }
 143         }
 144
 145         joined_wim->hdr.image_count = swms[0]->hdr.image_count;
 146         for (i = 0; i < num_swms; i++)
 147                 lookup_table_join(joined_wim->lookup_table, swms[i]->lookup_table);
 148
 149         free_wim_info(joined_wim->wim_info);
 150         joined_wim->wim_info = swms[0]->wim_info;
 151         ret = finish_write(joined_wim, WIMLIB_ALL_IMAGES, write_flags, progress_func);
 152         joined_wim->wim_info = NULL;
 153         return ret;
 154 }
 155
 156 static int
 157 cmp_swms_by_part_number(const void *swm1, const void *swm2)
 158 {
 159         u16 partno_1 = (*(const WIMStruct**)swm1)->hdr.part_number;
 160         u16 partno_2 = (*(const WIMStruct**)swm2)->hdr.part_number;
 161         return (int)partno_1 - (int)partno_2;
 162 }
 163
 164 /*
 165  * Join a set of split WIMs into a stand-alone WIM.
 166  */
 167 WIMLIBAPI int
 168 wimlib_join(const tchar * const *swm_names,
 169             unsigned num_swms,
 170             const tchar *output_path,
 171             int swm_open_flags,
 172             int wim_write_flags,
 173             wimlib_progress_func_t progress_func)
 174 {
 175         int ret;
 176         WIMStruct *joined_wim = NULL;
 177         unsigned i;
 178
 179         swm_open_flags |= WIMLIB_OPEN_FLAG_SPLIT_OK;
 180         wim_write_flags &= WIMLIB_WRITE_MASK_PUBLIC;
 181
 182         if (num_swms < 1 || num_swms > 0xffff)
 183                 return WIMLIB_ERR_INVALID_PARAM;
 184
 185         WIMStruct *swms[num_swms];
 186         ZERO_ARRAY(swms);
 187
 188         for (i = 0; i < num_swms; i++) {
 189                 ret = wimlib_open_wim(swm_names[i], swm_open_flags, &swms[i],
 190                                       progress_func);
 191                 if (ret != 0)
 192                         goto out;
 193
 194                 /* Don't open all the parts at the same time, in case there are
 195                  * a lot of them */
 196                 fclose(swms[i]->fp);
 197                 swms[i]->fp = NULL;
 198         }
 199
 200         qsort(swms, num_swms, sizeof(swms[0]), cmp_swms_by_part_number);
 201
 202         ret = verify_swm_set(swms[0], &swms[1], num_swms - 1);
 203         if (ret != 0)
 204                 goto out;
 205
 206         ret = wimlib_create_new_wim(wimlib_get_compression_type(swms[0]),
 207                                     &joined_wim);
 208         if (ret != 0)
 209                 goto out;
 210
 211         ret = begin_write(joined_wim, output_path, wim_write_flags);
 212         if (ret != 0)
 213                 goto out;
 214         ret = join_wims(swms, num_swms, joined_wim, wim_write_flags,
 215                         progress_func);
 216 out:
 217         for (i = 0; i < num_swms; i++)
 218                 wimlib_free(swms[i]);
 219         wimlib_free(joined_wim);
 220         return ret;
 221 }