some features

in main.cpp fastest Variant implementation

lib/main/containers/picontainers.cpp

@@ -371,4 +371,7 @@
 * \fn bool PIMapIterator::next()
 * \brief Jump to next entry and return if new position is valid.
 
+* \fn void PIMapIterator::reset()
+* \brief Reset iterator to initial position.
+
  * */

lib/main/containers/pimap.h

@@ -364,6 +364,13 @@ public:
 		}
 		return false;
 	}
+	inline void reset() {
+		if (rev) {
+			pos = m.size_s();
+		} else {
+			pos = -1;
+		}
+	}
 private:
 	const MapType & m;
 	ssize_t pos;