1 files changed, 44 insertions, 0 deletions

diff --git a/list-tail-node.c b/list-tail-node.c
index c939b8d..158fae8 100644
--- a/list-tail-node.c
+++ b/list-tail-node.c
@@ -89,6 +89,50 @@ list_pop_front(struct list *list, T *data)
         }
 }
 
+void
+list_insert_next(struct list *list, struct list_node *node, T data)
+{
+        if ( node == NULL ) { // Am Anfang einfügen
+                list_push_front(list, data);
+        }
+        else {
+                struct list_node *new_node = create_node(node->next, data);
+
+                if ( new_node != NULL ) {
+                        if ( node->next == NULL ) { // Am Ende einfügen
+                                list->tail = new_node;
+                        }
+                        node->next = new_node;
+                }
+                else {
+                        ERROR("out of memory");
+                }
+        }
+}
+
+void
+list_delete_next(struct list *list, struct list_node *node, T *data)
+{
+        if ( node == NULL ) { // Am Anfang entfernen
+                list_pop_front(list, data);
+        }
+        else {
+                if ( node->next != NULL ) {
+                        struct list_node *old_node = node->next;
+                        node->next                 = node->next->next;
+
+                        if ( node->next == NULL ) {
+                                list->tail = node;
+                        }
+
+                        if ( data != NULL ) {
+                                *data = old_node->data;
+                        }
+                        free(old_node);
+                }
+        }
+}
+
 bool
 list_empty(struct list *list)
 {