diff -r afd3120ec71e -r a34e9f56ddda log_source.py
--- a/log_source.py	Tue Feb 10 04:27:22 2009 +0200
+++ b/log_source.py	Tue Feb 10 05:56:57 2009 +0200
@@ -144,7 +144,7 @@
 
     def get_month_days (self, dt) :
         """
-            Get a set of dates, telling which days in the given month (as a datetime) have logs available
+            Return a sequence of dates, telling which days in the given month (as a datetime) have logs available
         """
 
         abstract
@@ -294,7 +294,7 @@
             # yield the rest a line at a time in reverse order... this looks weird, but that's how slicing works :)
             # XXX: use something like islice, this has to build a slice object
             for line in lines[:0:-1] :
-                yield line.decode(self.charset)
+                yield self.decoder.decode(line)
 
     def read_latest (self, count) :
         """
@@ -516,28 +516,38 @@
                 f_begin.read_from(dtz_begin), 
                 f_end.read_until(dtz_end) if f_end else []
             )
+    
+    def _iter_month_days (self, month) :
+        """
+            Iterates over the days of a month as dt objects with time=0
+        """
+        
+        # there's at most 31 days in a month...
+        for day in xrange(1, 32) :
+            try :
+                # try and build the datetime
+                dt = datetime.datetime(month.year, month.month, day)
+
+            except :
+                # stop
+                return
+            
+            else :
+                # fix timezones + yield
+                yield month.tzinfo.localize(dt)
 
     def get_month_days (self, month) :
         """
             Returns a set of dates for which logfiles are available in the given datetime's month
         """
         
-        # the set of days
-        days = set()
-        
-        # iterate over month's days using Calendar
-        for date in calendar.Calendar().itermonthdates(month.year, month.month) :
-            # convert date to target datetime
-            dtz = month.tzinfo.localize(datetime.datetime.combine(date, datetime.time(0))).astimezone(self.tz)
-
+        # iterate over month's days
+        for dt in self._iter_month_days(month) :
             # date in our target timezone
-            log_date = dtz.date()
+            log_date = dt.astimezone(self.tz).date()
             
             # test for it
             if self._get_logfile_date(log_date, load=False) :
-                # add to set
-                days.add(date)
+                # valid
+                yield dt.date()
 
-        # return set
-        return days
-