]> wimlib.net Git - wimlib/blobdiff - src/join.c
Simplify merging/unmerging of lookup tables when handling split WIMs
[wimlib] / src / join.c
index 7d33eb895e54b7ee0945cf569f19ed7d6fd41ec0..9977942cc80bab94b69a2d0c6e682e74738a3bcd 100644 (file)
 #include <stdlib.h>
 
 static int
-move_lte_to_table(struct wim_lookup_table_entry *lte, void *other_tab)
+move_lte_to_table(struct wim_lookup_table_entry *lte, void *combined_table)
 {
        hlist_del(&lte->hash_list);
-       lookup_table_insert((struct wim_lookup_table*)other_tab, lte);
+       lookup_table_insert((struct wim_lookup_table*)combined_table, lte);
        return 0;
 }
 
-static int
-lookup_table_join(struct wim_lookup_table *table,
-                 struct wim_lookup_table *new)
+static void
+lookup_table_join(struct wim_lookup_table *combined_table,
+                 struct wim_lookup_table *part_table)
 {
-       return for_lookup_table_entry(new, move_lte_to_table, table);
+       for_lookup_table_entry(part_table, move_lte_to_table, combined_table);
+       part_table->num_entries = 0;
 }
 
 /*
- * new_joined_lookup_table: - Join lookup tables from the parts of a split WIM.
+ * merge_lookup_tables() - Merge lookup tables from the parts of a split WIM.
  *
  * @w specifies the first part, while @additional_swms and @num_additional_swms
  * specify an array of pointers to the WIMStruct's for additional split WIM parts.
  *
- * The lookup table entries are *moved* to the new table.
- *
- * On success, 0 is returned on a pointer to the joined lookup table is returned
- * in @table_ret.
- *
  * The reason we join the lookup tables is so we only have to search one lookup
  * table to find the location of a resource in the entire WIM.
  */
-int
-new_joined_lookup_table(WIMStruct *w,
-                       WIMStruct **additional_swms,
-                       unsigned num_additional_swms,
-                       struct wim_lookup_table **table_ret)
+void
+merge_lookup_tables(WIMStruct *w,
+                   WIMStruct **additional_swms,
+                   unsigned num_additional_swms)
 {
-       struct wim_lookup_table *table;
-       int ret;
-       unsigned i;
-
-       table = new_lookup_table(9001);
-       if (!table)
-               return WIMLIB_ERR_NOMEM;
-
-       if (w)
-               lookup_table_join(table, w->lookup_table);
+       for (unsigned i = 0; i < num_additional_swms; i++)
+               lookup_table_join(w->lookup_table, additional_swms[i]->lookup_table);
+}
 
-       for (i = 0; i < num_additional_swms; i++) {
-               ret = lookup_table_join(table, additional_swms[i]->lookup_table);
-               if (ret != 0)
-                       goto out_free_table;
+static int
+move_lte_to_orig_table(struct wim_lookup_table_entry *lte, void *_wim)
+{
+       WIMStruct *wim = _wim;
+       if (lte->wim != wim) {
+               move_lte_to_table(lte, lte->wim->lookup_table);
+               wim->lookup_table->num_entries--;
        }
-       *table_ret = table;
        return 0;
-out_free_table:
-       free_lookup_table(table);
-       return ret;
+}
+
+/* Undo merge_lookup_tables(), given the first WIM part that contains the merged
+ * lookup table. */
+void
+unmerge_lookup_table(WIMStruct *wim)
+{
+       for_lookup_table_entry(wim->lookup_table, move_lte_to_orig_table, wim);
 }
 
 
@@ -107,33 +102,29 @@ join_wims(WIMStruct **swms, unsigned num_swms,
        }
 
        if (progress_func) {
-               progress.join.total_bytes        = total_bytes;
-               progress.join.total_parts        = swms[0]->hdr.total_parts;
-               progress.join.completed_bytes    = 0;
-               progress.join.completed_parts    = 0;
+               progress.join.total_bytes     = total_bytes;
+               progress.join.total_parts     = swms[0]->hdr.total_parts;
+               progress.join.completed_bytes = 0;
+               progress.join.completed_parts = 0;
                progress_func(WIMLIB_PROGRESS_MSG_JOIN_STREAMS, &progress);
        }
 
        /* Write the non-metadata resources from each SWM part */
        for (i = 0; i < num_swms; i++) {
-               swms[i]->fp = tfopen(swms[i]->filename, T("rb"));
-               if (!swms[i]->fp) {
-                       ERROR_WITH_ERRNO("Failed to reopen `%"TS"'",
-                                        swms[i]->filename);
-                       return WIMLIB_ERR_OPEN;
-               }
-               swms[i]->out_fp = joined_wim->out_fp;
+               ret = reopen_wim(swms[i]);
+               if (ret)
+                       return ret;
+               swms[i]->out_fd = joined_wim->out_fd;
                swms[i]->hdr.part_number = 1;
-               ret = for_lookup_table_entry(swms[i]->lookup_table,
-                                            copy_resource, swms[i]);
-               swms[i]->out_fp = NULL;
 
-               if (i != 0) {
-                       fclose(swms[i]->fp);
-                       swms[i]->fp = NULL;
-               }
+               ret = for_lookup_table_entry_pos_sorted(swms[i]->lookup_table,
+                                                       copy_resource,
+                                                       swms[i]);
+               swms[i]->out_fd = -1;
+               if (i != 0)
+                       close_wim(swms[i]);
 
-               if (ret != 0)
+               if (ret)
                        return ret;
 
                if (progress_func) {
@@ -143,18 +134,16 @@ join_wims(WIMStruct **swms, unsigned num_swms,
                }
        }
 
-       /* Write metadata resources from the first SWM part */
-       swms[0]->out_fp = joined_wim->out_fp;
-       ret = for_image(swms[0], WIMLIB_ALL_IMAGES, write_metadata_resource);
-       swms[0]->out_fp = NULL;
-       fclose(swms[0]->fp);
-       swms[0]->fp = NULL;
-
-       if (ret)
-               return ret;
+       /* Copy the metadata resources from the first SWM part */
+       joined_wim->hdr.image_count = swms[0]->hdr.image_count;
+       for (i = 0; i < joined_wim->hdr.image_count; i++) {
+               ret = copy_resource(swms[0]->image_metadata[i]->metadata_lte,
+                                   joined_wim);
+               if (ret)
+                       return ret;
+       }
 
        /* Write lookup table, XML data, and optional integrity table */
-       joined_wim->hdr.image_count = swms[0]->hdr.image_count;
        for (i = 0; i < num_swms; i++)
                lookup_table_join(joined_wim->lookup_table, swms[i]->lookup_table);
 
@@ -202,32 +191,31 @@ wimlib_join(const tchar * const *swm_names,
        for (i = 0; i < num_swms; i++) {
                ret = wimlib_open_wim(swm_names[i], swm_open_flags, &swms[i],
                                      progress_func);
-               if (ret != 0)
-                       goto out;
+               if (ret)
+                       goto out_free_wims;
 
                /* Don't open all the parts at the same time, in case there are
                 * a lot of them */
-               fclose(swms[i]->fp);
-               swms[i]->fp = NULL;
+               close_wim(swms[i]);
        }
 
        qsort(swms, num_swms, sizeof(swms[0]), cmp_swms_by_part_number);
 
        ret = verify_swm_set(swms[0], &swms[1], num_swms - 1);
-       if (ret != 0)
-               goto out;
+       if (ret)
+               goto out_free_wims;
 
        ret = wimlib_create_new_wim(wimlib_get_compression_type(swms[0]),
                                    &joined_wim);
-       if (ret != 0)
-               goto out;
+       if (ret)
+               goto out_free_wims;
 
        ret = begin_write(joined_wim, output_path, wim_write_flags);
-       if (ret != 0)
-               goto out;
+       if (ret)
+               goto out_free_wims;
        ret = join_wims(swms, num_swms, joined_wim, wim_write_flags,
                        progress_func);
-out:
+out_free_wims:
        for (i = 0; i < num_swms; i++)
                wimlib_free(swms[i]);
        wimlib_free(joined_wim);