Add utility function for comparing json_objects

json_object.h

@@ -691,6 +691,26 @@ extern const char* json_object_get_string(struct json_object *obj);
  */
 extern int json_object_get_string_len(const struct json_object *obj);
 
+/** Check if two json_object's are equal
+ *
+ * If the passed objects are equal 1 will be returned.
+ * Equality is defined as follows:
+ * - json_objects of different types are never equal
+ * - json_objects of the same primitive type are equal if the
+ *   c-representation of their value is equal
+ * - json-arrays are considered equal if all values at the same
+ *   indices are equal (same order)
+ * - Complex json_objects are considered equal if all
+ *   contained objects referenced by their key are equal,
+ *   regardless their order.
+ *
+ * @param obj1 the first json_object instance
+ * @param obj2 the second json_object instance
+ * @returns whether both objects are equal or not
+ */
+extern int json_object_equal(struct json_object *obj1,
+			     struct json_object *obj2);
+
 #ifdef __cplusplus
 }
 #endif