--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/tools/utils.py	Fri Feb 22 00:11:47 2013 +0100
@@ -0,0 +1,36 @@
+#!/usr/bin/python
+# -*- coding: utf-8 -*-
+
+"""
+SAT: a jabber client
+Copyright (C) 2009, 2010, 2011, 2012, 2013  Jérôme Poisson (goffi@goffi.org)
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU Affero General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+This program 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 Affero General Public License for more details.
+
+You should have received a copy of the GNU Affero General Public License
+along with this program.  If not, see <http://www.gnu.org/licenses/>.
+"""
+
+""" various useful methods """
+
+import unicodedata
+    
+    
+def clean_ustr(ustr):
+    """Clean unicode string
+    remove special characters from unicode string"""
+    def valid_chars(unicode_source):
+        for char in unicode_source:
+            if unicodedata.category(char) == 'Cc' and char!='\n':
+                continue
+            yield char
+    return ''.join(valid_chars(ustr))
+