+#include "wimlib.h"
+#include "wimlib/lookup_table.h"
+#include "wimlib/metadata.h"
+#include "wimlib/resource.h"
+#include "wimlib/swm.h"
+#include "wimlib/wim.h"
+#include "wimlib/write.h"
+#include "wimlib/xml.h"
+
+#include <stdlib.h> /* for qsort() */
+
+static int
+move_lte_to_table(struct wim_lookup_table_entry *lte, void *combined_table)
+{
+ hlist_del(<e->hash_list);
+ lookup_table_insert((struct wim_lookup_table*)combined_table, lte);
+ return 0;
+}
+
+static void
+lookup_table_join(struct wim_lookup_table *combined_table,
+ struct wim_lookup_table *part_table)
+{
+ for_lookup_table_entry(part_table, move_lte_to_table, combined_table);
+ part_table->num_entries = 0;
+}
+
+/*
+ * 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 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.
+ */
+void
+merge_lookup_tables(WIMStruct *w,
+ WIMStruct **additional_swms,
+ unsigned num_additional_swms)
+{
+ for (unsigned i = 0; i < num_additional_swms; i++)
+ lookup_table_join(w->lookup_table, additional_swms[i]->lookup_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--;
+ }
+ return 0;
+}
+
+/* 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);
+}
+
+
+static int
+join_wims(WIMStruct **swms, unsigned num_swms,
+ WIMStruct *joined_wim, int write_flags,
+ wimlib_progress_func_t progress_func)