add function uniq_skiplist_find_node_ex

HISTORY

 
+Version 1.45  2020-12-24
+  * add function uniq_skiplist_find_node_ex
+
 Version 1.44  2020-12-06
   * add test file src/tests/test_pthread_lock.c
   * add uniq_skiplist.[hc]

src/fast_buffer.h

@@ -108,4 +108,3 @@ static inline int fast_buffer_append_buffer(FastBuffer *buffer, FastBuffer *src)
 #endif
 
 #endif
-

src/uniq_skiplist.c

@@ -531,6 +531,16 @@ int uniq_skiplist_replace_ex(UniqSkiplist *sl, void *data,
     return 0;
 }
 
+UniqSkiplistNode *uniq_skiplist_find_node_ex(UniqSkiplist *sl, void *data,
+        UniqSkiplistNode **previous)
+{
+    int level_index;
+
+    *previous = uniq_skiplist_get_equal_previous(sl, data, &level_index);
+    return (*previous != NULL) ? (UniqSkiplistNode *)
+        (*previous)->links[level_index] : NULL;
+}
+
 UniqSkiplistNode *uniq_skiplist_find_node(UniqSkiplist *sl, void *data)
 {
     int level_index;

src/uniq_skiplist.h

@@ -112,6 +112,10 @@ int uniq_skiplist_find_range(UniqSkiplist *sl, void *start_data,
         void *end_data, UniqSkiplistIterator *iterator);
 
 UniqSkiplistNode *uniq_skiplist_find_node(UniqSkiplist *sl, void *data);
+
+UniqSkiplistNode *uniq_skiplist_find_node_ex(UniqSkiplist *sl, void *data,
+        UniqSkiplistNode **previous);
+
 void uniq_skiplist_delete_node_ex(UniqSkiplist *sl,
         UniqSkiplistNode *previous, UniqSkiplistNode *deleted,
         const bool need_free);