Hopefully fix crash on sending "Schöfferhofer" to LCD display

client-barcode/freitagskasse.py

@@ -7,6 +7,7 @@
 from __future__ import print_function
 import freitagslib.network as net
 from freitagslib.commands import BuyCommand, DepositCommand
+from freitagslib.encoding import asciify
 
 import colorama
 from colorama import Fore, Style
@@ -332,7 +333,7 @@ class Status:
 						mylabel="Pfand "+command.commodity_label()[:9]
 					if (mycmd==3):	
 						mylabel=("%-13s" % (command.commodity_label()[:13]))+"+P"
-					print_display('\x0b%-15s %4.2f' % (mylabel[:15],abs(command.difference())));
+					print_display('\x0b%-15s %4.2f' % (asciify(mylabel)[:15],abs(command.difference())));
 					print_display('\x0b\nSUMME: {%02i} %8.2f' % ((i-1),initial_balance - self.balance));
 				else:
 					print_display('\x0b%-15s %4.2f' % (command.label()[:15],abs(command.difference())));

client-barcode/freitagslib/encoding.py

@@ -0,0 +1,35 @@
+#! /usr/bin/env python
+# -*- coding: utf-8 -*-
+#
+# Copyright (C) 2011 Sebastian Pipping <sebastian@pipping.org>
+# Licensed under GPL v3 or later
+
+from __future__ import print_function
+
+def asciify(utf8):
+	_mapping = (
+		('ö', 'oe'),
+		('Ö', 'Oe'),
+		('ä', 'ae'),
+		('Ä', 'Ae'),
+		('ü', 'ue'),
+		('Ü', 'Ue'),
+		('ß', 'ss'),
+	)
+	_mapping = dict(((ord(unicode(key, 'utf-8')), value) for key, value in _mapping))
+
+	def subst(unichar):
+		def fix(unichar):
+			if ord(unichar) > 127:
+				return unicode('?')
+			return unichar
+
+		return _mapping.get(ord(unichar), fix(unichar))
+
+	unichars = utf8.decode('utf-8')
+	unitext = ''.join(subst(e) for e in unichars)
+	return unitext.encode('ascii')
+
+	
+if __name__ == '__main__':
+	print(asciify('Schöfferhofer'))