X-Git-Url: https://wimlib.net/git/?p=wimlib;a=blobdiff_plain;f=src%2Flist.h;h=2991f46a1fed17d0ec36cbf5e7cc750deaee17e4;hp=889097b5acf36521157178f9d1e0995fce306bcc;hb=22c0e369cb60b73a9ec209c878173001bfb43db8;hpb=9e2571b03cd9c71d11b3dad9ea5dcfa43f50deb4

diff --git a/src/list.h b/src/list.h
index 889097b5..2991f46a 100644
--- a/src/list.h
+++ b/src/list.h
@@ -145,6 +145,47 @@ static inline void list_splice(const struct list_head *list,
 		__list_splice(list, head, head->next);
 }
 
+/* Move the entire list @old to the list @new, overwriting it. */
+static inline void list_transfer(struct list_head *old,
+				 struct list_head *new)
+{
+	struct list_head *prev, *next;
+
+	if (list_empty(old)) {
+		INIT_LIST_HEAD(new);
+	} else {
+		prev = old->prev;
+		next = old->next;
+		new->next = next;
+		new->prev = prev;
+		prev->next = new;
+		next->prev = new;
+	}
+}
+
+/**
+ * list_move - delete from one list and add as another's head
+ * @list: the entry to move
+ * @head: the head that will precede our entry
+ */
+static inline void list_move(struct list_head *list, struct list_head *head)
+{
+	list_del(list);
+	list_add(list, head);
+}
+
+/**
+ * list_move_tail - delete from one list and add as another's tail
+ * @list: the entry to move
+ * @head: the head that will follow our entry
+ */
+static inline void list_move_tail(struct list_head *list,
+				  struct list_head *head)
+{
+	list_del(list);
+	list_add_tail(list, head);
+}
+
 /**
  * list_splice_tail - join two lists, each list being a queue
  * @list: the new list to add.