Make PyDateTime_DELTA_*() macros in datetime.pxd available in Py2.

See https://github.com/cython/cython/pull/3616

Cython/Includes/cpython/datetime.pxd

@@ -5,6 +5,17 @@ cdef extern from "Python.h":
         pass
 
 cdef extern from "datetime.h":
+    """
+    #if PY_MAJOR_VERSION < 3 && !defined(PyDateTime_DELTA_GET_DAYS)
+    #define PyDateTime_DELTA_GET_DAYS(o)         (((PyDateTime_Delta*)o)->days)
+    #endif
+    #if PY_MAJOR_VERSION < 3 && !defined(PyDateTime_DELTA_GET_SECONDS)
+    #define PyDateTime_DELTA_GET_SECONDS(o)      (((PyDateTime_Delta*)o)->seconds)
+    #endif
+    #if PY_MAJOR_VERSION < 3 && !defined(PyDateTime_DELTA_GET_MICROSECONDS)
+    #define PyDateTime_DELTA_GET_MICROSECONDS(o)   (((PyDateTime_Delta*)o)->microseconds)
+    #endif
+    """
 
     ctypedef extern class datetime.date[object PyDateTime_Date]:
         pass

tests/run/datetime_pxd.pyx

@@ -12,6 +12,13 @@ from cpython.datetime cimport date_day, date_month, date_year
 from cpython.datetime cimport datetime_day, datetime_month, datetime_year
 from cpython.datetime cimport datetime_hour, datetime_minute, datetime_second, \
                               datetime_microsecond
+# These were added in Py3, make sure that their backport works.
+from cpython.datetime cimport (
+    timedelta as timedelta_ext_type,
+    PyDateTime_DELTA_GET_DAYS,
+    PyDateTime_DELTA_GET_SECONDS,
+    PyDateTime_DELTA_GET_MICROSECONDS,
+)
 
 import datetime as py_datetime
 
@@ -37,7 +44,23 @@ class FixedOffset(py_datetime.tzinfo):
 
     def dst(self, dt):
         return ZERO
-        
+
+
+def do_timedelta_macros(timedelta_ext_type delta):
+    """
+    >>> delta = py_datetime.timedelta(days=13, hours=7, seconds=31, microseconds=993322)
+    >>> (delta.days, delta.seconds, delta.microseconds)
+    (13, 25231, 993322)
+    >>> do_timedelta_macros(delta)
+    (13, 25231, 993322)
+    """
+    return (
+        PyDateTime_DELTA_GET_DAYS(delta),
+        PyDateTime_DELTA_GET_SECONDS(delta),
+        PyDateTime_DELTA_GET_MICROSECONDS(delta),
+    )
+
+
 def do_date(int year, int month, int day):
     """
     >>> do_date(2012, 12, 31)
@@ -46,7 +69,7 @@ def do_date(int year, int month, int day):
     v = date_new(year, month, day)
     return type(v) is py_datetime.date, v.year == year, v.month == month, v.day == day
 
-def do_datetime(int year, int month, int day, 
+def do_datetime(int year, int month, int day,
         int hour, int minute, int second, int microsecond):
     """
     >>> do_datetime(2012, 12, 31, 12, 23, 0, 0)
@@ -69,7 +92,7 @@ def do_time(int hour, int minute, int second, int microsecond):
 
 def do_time_tzinfo(int hour, int minute, int second, int microsecond, object tz):
     """
-    >>> tz = FixedOffset(60*3, 'Moscow')    
+    >>> tz = FixedOffset(60*3, 'Moscow')
     >>> do_time_tzinfo(12, 23, 0, 0, tz)
     (True, True, True, True, True, True)
     """
@@ -79,10 +102,10 @@ def do_time_tzinfo(int hour, int minute, int second, int microsecond, object tz)
            v.microsecond == microsecond, v.tzinfo is tz
 
 
-def do_datetime_tzinfo(int year, int month, int day, 
+def do_datetime_tzinfo(int year, int month, int day,
         int hour, int minute, int second, int microsecond, object tz):
     """
-    >>> tz = FixedOffset(60*3, 'Moscow')    
+    >>> tz = FixedOffset(60*3, 'Moscow')
     >>> do_datetime_tzinfo(2012, 12, 31, 12, 23, 0, 0, tz)
     (True, True, True, True, True, True, True, True, True)
     """
@@ -90,35 +113,35 @@ def do_datetime_tzinfo(int year, int month, int day,
     return type(v) is py_datetime.datetime, v.year == year, v.month == month, v.day == day, \
            v.hour == hour, v.minute == minute, v.second == second, \
            v.microsecond == microsecond, v.tzinfo is tz
-           
+
 def do_time_tzinfo2(int hour, int minute, int second, int microsecond, object tz):
     """
-    >>> tz = FixedOffset(60*3, 'Moscow')    
+    >>> tz = FixedOffset(60*3, 'Moscow')
     >>> do_time_tzinfo2(12, 23, 0, 0, tz)
     (True, True, True, True, True, True, True, True)
     """
     v = time_new(hour, minute, second, microsecond, None)
     v1 = time_new(
-            time_hour(v), 
-            time_minute(v), 
-            time_second(v), 
-            time_microsecond(v), 
+            time_hour(v),
+            time_minute(v),
+            time_second(v),
+            time_microsecond(v),
             tz)
     r1 = (v1.tzinfo == tz)
     r2 = (tz == time_tzinfo(v1))
     v2 = time_new(
-            time_hour(v1), 
-            time_minute(v1), 
-            time_second(v1), 
-            time_microsecond(v1), 
+            time_hour(v1),
+            time_minute(v1),
+            time_second(v1),
+            time_microsecond(v1),
             None)
     r3 = (v2.tzinfo == None)
     r4 = (None == time_tzinfo(v2))
     v3 = time_new(
-            time_hour(v2), 
-            time_minute(v2), 
-            time_second(v2), 
-            time_microsecond(v2), 
+            time_hour(v2),
+            time_minute(v2),
+            time_second(v2),
+            time_microsecond(v2),
             tz)
     r5 = (v3.tzinfo == tz)
     r6 = (tz == time_tzinfo(v3))
@@ -130,41 +153,41 @@ def do_time_tzinfo2(int hour, int minute, int second, int microsecond, object tz
 def do_datetime_tzinfo2(int year, int month, int day,
                               int hour, int minute, int second, int microsecond, object tz):
     """
-    >>> tz = FixedOffset(60*3, 'Moscow')    
+    >>> tz = FixedOffset(60*3, 'Moscow')
     >>> do_datetime_tzinfo2(2012, 12, 31, 12, 23, 0, 0, tz)
     (True, True, True, True, True, True, True, True)
     """
     v = datetime_new(year, month, day, hour, minute, second, microsecond, None)
     v1 = datetime_new(
-            datetime_year(v), 
-            datetime_month(v), 
-            datetime_day(v), 
-            datetime_hour(v), 
-            datetime_minute(v), 
-            datetime_second(v), 
-            datetime_microsecond(v), 
+            datetime_year(v),
+            datetime_month(v),
+            datetime_day(v),
+            datetime_hour(v),
+            datetime_minute(v),
+            datetime_second(v),
+            datetime_microsecond(v),
             tz)
     r1 = (v1.tzinfo == tz)
     r2 = (tz == datetime_tzinfo(v1))
     v2 = datetime_new(
-            datetime_year(v1), 
-            datetime_month(v1), 
-            datetime_day(v1), 
-            datetime_hour(v1), 
-            datetime_minute(v1), 
-            datetime_second(v1), 
-            datetime_microsecond(v1), 
+            datetime_year(v1),
+            datetime_month(v1),
+            datetime_day(v1),
+            datetime_hour(v1),
+            datetime_minute(v1),
+            datetime_second(v1),
+            datetime_microsecond(v1),
             None)
     r3 = (v2.tzinfo == None)
     r4 = (None == datetime_tzinfo(v2))
     v3 = datetime_new(
-            datetime_year(v2), 
-            datetime_month(v2), 
-            datetime_day(v2), 
-            datetime_hour(v2), 
-            datetime_minute(v2), 
-            datetime_second(v2), 
-            datetime_microsecond(v2), 
+            datetime_year(v2),
+            datetime_month(v2),
+            datetime_day(v2),
+            datetime_hour(v2),
+            datetime_minute(v2),
+            datetime_second(v2),
+            datetime_microsecond(v2),
             tz)
     r5 = (v3.tzinfo == tz)
     r6 = (tz == datetime_tzinfo(v3))