# Max year is only limited by the size of C int.

SIZEOF_INT = sysconfig.get_config_var('SIZEOF_INT') or 4

TIME_MAXYEAR = (1 << 8 * SIZEOF_INT - 1) - 1

TIME_MINYEAR = -TIME_MAXYEAR - 1

TIME_MINYEAR = -TIME_MAXYEAR - 1 + 1900

SEC_TO_US = 10 ** 6

US_TO_NS = 10 ** 3

self.assertEqual(self.yearstr(-123456), '-123456')

self.assertEqual(self.yearstr(-123456789), str(-123456789))

self.assertEqual(self.yearstr(-1234567890), str(-1234567890))

self.assertEqual(self.yearstr(TIME_MINYEAR + 1900), str(TIME_MINYEAR + 1900))

# Issue #13312: it may return wrong value for year < TIME_MINYEAR + 1900

# Skip the value test, but check that no error is raised

self.yearstr(TIME_MINYEAR)

# self.assertEqual(self.yearstr(TIME_MINYEAR), str(TIME_MINYEAR))

self.assertEqual(self.yearstr(TIME_MINYEAR), str(TIME_MINYEAR))

# Modules/timemodule.c checks for underflow

self.assertRaises(OverflowError, self.yearstr, TIME_MINYEAR - 1)

with self.assertRaises(OverflowError):

self.yearstr(-TIME_MAXYEAR - 1)

class TestAsctime4dyear(_TestAsctimeYear, _Test4dYear, unittest.TestCase):

Avoids a possible integer underflow (undefined behavior) in the time

module's year handling code when passed a very low negative year value.

&p->tm_hour, &p->tm_min, &p->tm_sec,

&p->tm_wday, &p->tm_yday, &p->tm_isdst))

return 0;

if (y < INT_MIN + 1900) {

PyErr_SetString(PyExc_OverflowError, "year out of range");

return 0;

}

p->tm_year = y - 1900;

p->tm_mon--;

p->tm_wday = (p->tm_wday + 1) % 7;