X-Git-Url: https://wimlib.net/git/?p=wimlib;a=blobdiff_plain;f=include%2Fwimlib%2Flist.h;h=4ac2d0b414f38e8c99d9161e9a144513256ec7c6;hp=d6bd55c11013b54dadb2d0e615882058ace32e64;hb=26c7f8bb32e4a32001d409f1693e0df016270ed5;hpb=54ab7519ebeec72c4435cc09fdaa3e8b3fb35d25

diff --git a/include/wimlib/list.h b/include/wimlib/list.h
index d6bd55c1..4ac2d0b4 100644
--- a/include/wimlib/list.h
+++ b/include/wimlib/list.h
@@ -86,6 +86,29 @@ static inline void list_add_tail(struct list_head *new, struct list_head *head)
 	__list_add(new, head->prev, head);
 }
 
+/**
+ * list_replace - replace old entry by new one
+ * @old : the element to be replaced
+ * @new : the new element to insert
+ *
+ * If @old was empty, it will be overwritten.
+ */
+static inline void list_replace(struct list_head *old,
+				struct list_head *new)
+{
+	new->next = old->next;
+	new->next->prev = new;
+	new->prev = old->prev;
+	new->prev->next = new;
+}
+
+static inline void list_replace_init(struct list_head *old,
+					struct list_head *new)
+{
+	list_replace(old, new);
+	INIT_LIST_HEAD(old);
+}
+
 /*
  * Delete a list entry by making the prev/next entries
  * point to each other.