X-Git-Url: https://wimlib.net/git/?p=wimlib;a=blobdiff_plain;f=src%2Flist.h;h=ff39710b1dec75761b98a66e2605f824aceaa5a4;hp=82f08e5ff47e9e192777edfebc9358a590dcd119;hb=3f9b53a4a214a254bb27ed30994faf2a0fd12375;hpb=1530b6dab02a9e1e5faf81529ab502aee68d8cd2;ds=sidebyside

diff --git a/src/list.h b/src/list.h
index 82f08e5f..ff39710b 100644
--- a/src/list.h
+++ b/src/list.h
@@ -119,6 +119,62 @@ static inline int list_empty(const struct list_head *head)
 	return head->next == head;
 }
 
+static inline void __list_splice(const struct list_head *list,
+				 struct list_head *prev,
+				 struct list_head *next)
+{
+	struct list_head *first = list->next;
+	struct list_head *last = list->prev;
+
+	first->prev = prev;
+	prev->next = first;
+
+	last->next = next;
+	next->prev = last;
+}
+
+/**
+ * list_splice - join two lists, this is designed for stacks
+ * @list: the new list to add.
+ * @head: the place to add it in the first list.
+ */
+static inline void list_splice(const struct list_head *list,
+				struct list_head *head)
+{
+	if (!list_empty(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_splice_tail - join two lists, each list being a queue
+ * @list: the new list to add.
+ * @head: the place to add it in the first list.
+ */
+static inline void list_splice_tail(struct list_head *list,
+				struct list_head *head)
+{
+	if (!list_empty(list))
+		__list_splice(list, head->prev, head);
+}
+
 /**
  * list_entry - get the struct for this entry
  * @ptr:	the &struct list_head pointer.