Merge 2fdf3be into 4d5c48e

Changelog

@@ -1,3 +1,7 @@
+since version 1.2.1 release
+===========================
+ * add tooridinal() to cftime.datetime, expose to_calendar_specific_datetime.
+
 version 1.2.1 (release tag v1.2.1rel)
 =====================================
  * num2date uses 'proleptic_gregorian' scheme when basedate is post-Gregorian but date is pre-Gregorian

cftime/_cftime.pyx

@@ -332,7 +332,13 @@ DATE_TYPES = {
 }
 
 
+@cython.embedsignature(True)
 def to_calendar_specific_datetime(datetime, calendar, use_python_datetime):
+    """
+    convert from one calendar-specific datetime instance to another.
+    If use_python_datetime=True, convert to python datetime (and ignore
+    calendar kwarg).
+    """
     if use_python_datetime:
         date_type = real_datetime
     else:
@@ -1113,6 +1119,17 @@ datetime object."""
             else:
                 return NotImplemented
 
+    def toordinal(self):
+        """
+        returns integer days since 1-1-1, like python's datetime toordinal.
+        """
+        if self.calendar == '':
+            raise ValueError('calendar must be specified to compute ordinal')
+        else:
+            epoch = _IntJulianDayFromDate(1,1,1,self.calendar)
+            jd = _IntJulianDayFromDate(self.year,self.month,self.day,self.calendar)
+            return jd - epoch + 1
+
 @cython.embedsignature(True)
 cdef class DatetimeNoLeap(datetime):
     """