add ecore_list_find() to find a data node via a compare callback

SVN revision: 27578

diff --git a/legacy/ecore/src/lib/ecore/Ecore_Data.h b/legacy/ecore/src/lib/ecore/Ecore_Data.h
index 2071726..a6b4096 100644 (file)
--- a/legacy/ecore/src/lib/ecore/Ecore_Data.h
+++ b/legacy/ecore/src/lib/ecore/Ecore_Data.h
@@ -113,6 +113,8 @@ extern "C" {
    
    /* Traversing the list and returning data */
    EAPI void *ecore_list_next(Ecore_List * list);
+   EAPI void *ecore_list_find(Ecore_List *list, Ecore_Compare_Cb function,
+        void *user_data);
    
    /* Check to see if there is any data in the list */
    EAPI int ecore_list_is_empty(Ecore_List * list);

diff --git a/legacy/ecore/src/lib/ecore/ecore_list.c b/legacy/ecore/src/lib/ecore/ecore_list.c
index d4e84e9..0fbf755 100644 (file)
--- a/legacy/ecore/src/lib/ecore/ecore_list.c
+++ b/legacy/ecore/src/lib/ecore/ecore_list.c
@@ -25,6 +25,7 @@ static void *_ecore_list_goto_index(Ecore_List *list, int index);
 /* Iterative function */
 static int _ecore_list_for_each(Ecore_List *list, Ecore_For_Each function,
                                 void *user_data);
+static void *_ecore_list_find(Ecore_List *list, Ecore_Compare_Cb function, void *user_data);
 
 /* Private double linked list functions */
 static void *_ecore_dlist_previous(Ecore_DList * list);
@@ -1020,6 +1021,35 @@ _ecore_list_for_each(Ecore_List *list, Ecore_For_Each function, void *user_data)
    return TRUE;
 }
 
+/**
+ * Find data in @p list using the compare function @p func
+ * @param list      The list.
+ * @param function  The function to test each node of @p list with
+ * @param user_data Data to match against (used by @p function)
+ * @return the first matching data node, or NULL if none match
+ */
+EAPI void *
+ecore_list_find(Ecore_List *list, Ecore_Compare_Cb function, void *user_data)
+{
+  CHECK_PARAM_POINTER_RETURN("list", list, NULL);
+
+  return _ecore_list_find(list, function, user_data);
+}
+
+/* The real meat of finding a node via a compare cb */
+static void *
+_ecore_list_find(Ecore_List *list, Ecore_Compare_Cb function, void *user_data)
+{
+  void *value;
+  if (!list || !function) return NULL;
+
+  _ecore_list_goto_first(list);
+  while ((value = _ecore_list_next(list)) != NULL)
+    if (!function(value, user_data)) return value;
+
+  return NULL;
+}
+
 /* Initialize a node to starting values */
 EAPI int 
 ecore_list_node_init(Ecore_List_Node *node)