Index: /branch/UMPA/umpa/utils/bits.py
===================================================================
--- /branch/UMPA/umpa/utils/bits.py (revision 3294)
+++ /branch/UMPA/umpa/utils/bits.py (revision 3294)
@@ -0,0 +1,31 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+
+# Copyright (C) 2008 Adriano Monteiro Marques.
+#
+# Author: Bartosz SKOWRON <getxsick at gmail dot com>
+#
+# This library is free software; you can redistribute it and/or modify 
+# it under the terms of the GNU Lesser General Public License as published 
+# by the Free Software Foundation; either version 2.1 of the License, or 
+# (at your option) any later version.
+#
+# This library is distributed in the hope that it will be useful, but 
+# WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+# or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public 
+# License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License 
+# along with this library; if not, write to the Free Software Foundation, 
+# Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 
+
+from umpa.protocols._consts import BYTE
+
+def split_into_chunks(number, number_length, chunks_size=BYTE):
+    """Split the big number into small chunks (default BYTE size).
+    Return them as a list.
+    """
+    mask = 2**chunks_size - 1
+    bytes = number_length / chunks_size
+    return [ (number & (mask << (chunks_size*i))) >> chunks_size*i
+                                    for i in reversed(xrange(bytes)) ]