优化: find_node 新增内存检查

AWList.c

@@ -25,10 +25,8 @@ AWList *AWList_init(AWList *list)
 
 void AWList_destroy(AWList *list)
 {
-	if (!list) {
+	if (!list)
 		return;
-	}
-
 	AWList_clear(list);
 
 	free(list->head);
@@ -44,6 +42,7 @@ void AWList_clear(AWList *list)
 	}
 	for (; list->tail != list->head; AWList_delete_node(list, list->tail))
 		;
+	list->iter = list->head;
 }
 
 AWNode *AWNode_init(void *data, void (*delete_func)(void *))
@@ -124,6 +123,9 @@ AWNode *AWList_find_node(AWList *list, void *data,
 	AWNode *node;
 	AWList_for_each(node, list)
 	{
+		if (!node || !data) {
+			return NULL;
+		}
 		if (cmp_callback(node->data, data) == 0)
 			return node;
 	}
@@ -136,12 +138,10 @@ AWNode *AWList_iterator(AWList *list)
 	if (!list || list->iter == list->tail->next)
 		return NULL;
 
-	if (list->iter == list->head) {
+	if (list->iter == list->head)
 		list->iter = list->head->next;
-	}
 
 	AWNode *iter = list->iter;
-
 	if (list->iter) {
 		list->iter = list->iter->next;
 	}

AWList.h

@@ -105,7 +105,8 @@ void AWList_add_tail(AWList *list, void *data, void (*delete_func)(void *));
  *
  * @param      list           pointer of list
  * @param      data           key data to find
- * @param      cmp_callback   callback to use data
+ * @param      cmp_callback   callback to use data,
+ *                            0: node->data is equal to the data to find
  *
  * @return     the pointer of the node if exists, NULL if not found
  */