Fixed bug with filenames started with a '-' sign.

uc1541

@@ -50,6 +50,7 @@ of error cause if any.
 UC1541_HIDE_DEL - if set, no DEL entries will be shown
 
 Changelog:
+    2.5 Fixed bug with filenames started with a '-' sign.
     2.4 Fixed endless loop bug for reading directory in Python implemented
         directory reader.
     2.3 Re added and missing method _correct_fname used for writing files
@@ -70,8 +71,8 @@ Changelog:
     1.0 Initial release
 
 Author: Roman 'gryf' Dobosz <gryf73@gmail.com>
-Date: 2012-09-30
-Version: 2.4
+Date: 2012-10-15
+Version: 2.5
 Licence: BSD
 """
 
@@ -175,6 +176,10 @@ class D64(object):
             character = D64.CHAR_MAP.get(ord(chr_), '?')
             filename.append(character)
 
+        # special cases
+        if filename[0] == "-":
+            filename[0] = "?"
+
         LOG.debug("string: ``%s'' mapped to: ``%s''", string,
                   "".join(filename))
         return "".join(filename)
@@ -434,9 +439,13 @@ class Uc1541(object):
                 if '/' in display_name:
                     display_name = display_name.replace('/', '|')
 
-                # workaround for space at the beggining of the filename
-                if display_name[0] == ' ':
-                    display_name = '~' + display_name[1:]
+                # workaround for space and dash at the beggining of the
+                # filename
+                char_map = {' ': '~',
+                            '-': '_'}
+                display_name = "".join([char_map.get(display_name[0],
+                                                     display_name[0]),
+                                        display_name[1:]])
 
                 if ext == 'del':
                     perms = "----------"