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https://github.com/python/cpython
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Issue #22117: Fix rounding in _PyTime_FromSecondsObject()
* Rename _PyTime_FromObject() to _PyTime_FromSecondsObject() * Add _PyTime_AsNanosecondsObject() and _testcapi.pytime_fromsecondsobject() * Add unit tests
This commit is contained in:
Victor Stinner
parent
79644f9c83
commit
992c43fec9
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@ -121,15 +121,18 @@ typedef PY_INT64_T _PyTime_t;
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/* Convert a Python float or int to a timetamp.
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Raise an exception and return -1 on error, return 0 on success. */
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PyAPI_FUNC(int) _PyTime_FromObject(_PyTime_t *t,
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PyAPI_FUNC(int) _PyTime_FromSecondsObject(_PyTime_t *t,
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PyObject *obj,
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_PyTime_round_t round);
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/* Convert timestamp to a number of milliseconds (10^-3 seconds). */
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PyAPI_FUNC(_PyTime_t)
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_PyTime_AsMilliseconds(_PyTime_t t,
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PyAPI_FUNC(_PyTime_t) _PyTime_AsMilliseconds(_PyTime_t t,
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_PyTime_round_t round);
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/* Convert timestamp to a number of nanoseconds (10^-9 seconds) as a Python int
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object. */
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PyAPI_FUNC(PyObject *) _PyTime_AsNanosecondsObject(_PyTime_t t);
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/* Convert a timestamp to a timeval structure. */
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PyAPI_FUNC(int) _PyTime_AsTimeval(_PyTime_t t,
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struct timeval *tv,
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@ -1,10 +1,11 @@
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from test import support
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import enum
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import locale
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import platform
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import sys
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import sysconfig
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import time
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import unittest
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import locale
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import sysconfig
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import sys
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import platform
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try:
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import threading
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except ImportError:
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@ -14,8 +15,15 @@
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SIZEOF_INT = sysconfig.get_config_var('SIZEOF_INT') or 4
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TIME_MAXYEAR = (1 << 8 * SIZEOF_INT - 1) - 1
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TIME_MINYEAR = -TIME_MAXYEAR - 1
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_PyTime_ROUND_DOWN = 0
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_PyTime_ROUND_UP = 1
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class _PyTime(enum.IntEnum):
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# Round towards zero
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ROUND_DOWN = 0
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# Round away from zero
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ROUND_UP = 1
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ALL_ROUNDING_METHODS = (_PyTime.ROUND_UP, _PyTime.ROUND_DOWN)
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class TimeTestCase(unittest.TestCase):
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@ -596,23 +604,23 @@ def test_time_t(self):
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from _testcapi import pytime_object_to_time_t
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for obj, time_t, rnd in (
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# Round towards zero
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(0, 0, _PyTime_ROUND_DOWN),
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(-1, -1, _PyTime_ROUND_DOWN),
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(-1.0, -1, _PyTime_ROUND_DOWN),
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(-1.9, -1, _PyTime_ROUND_DOWN),
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(1.0, 1, _PyTime_ROUND_DOWN),
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(1.9, 1, _PyTime_ROUND_DOWN),
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(0, 0, _PyTime.ROUND_DOWN),
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(-1, -1, _PyTime.ROUND_DOWN),
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(-1.0, -1, _PyTime.ROUND_DOWN),
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(-1.9, -1, _PyTime.ROUND_DOWN),
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(1.0, 1, _PyTime.ROUND_DOWN),
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(1.9, 1, _PyTime.ROUND_DOWN),
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# Round away from zero
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(0, 0, _PyTime_ROUND_UP),
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(-1, -1, _PyTime_ROUND_UP),
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(-1.0, -1, _PyTime_ROUND_UP),
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(-1.9, -2, _PyTime_ROUND_UP),
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(1.0, 1, _PyTime_ROUND_UP),
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(1.9, 2, _PyTime_ROUND_UP),
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(0, 0, _PyTime.ROUND_UP),
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(-1, -1, _PyTime.ROUND_UP),
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(-1.0, -1, _PyTime.ROUND_UP),
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(-1.9, -2, _PyTime.ROUND_UP),
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(1.0, 1, _PyTime.ROUND_UP),
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(1.9, 2, _PyTime.ROUND_UP),
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):
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self.assertEqual(pytime_object_to_time_t(obj, rnd), time_t)
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rnd = _PyTime_ROUND_DOWN
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rnd = _PyTime.ROUND_DOWN
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for invalid in self.invalid_values:
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self.assertRaises(OverflowError,
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pytime_object_to_time_t, invalid, rnd)
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@ -622,44 +630,44 @@ def test_timeval(self):
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from _testcapi import pytime_object_to_timeval
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for obj, timeval, rnd in (
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# Round towards zero
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(0, (0, 0), _PyTime_ROUND_DOWN),
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(-1, (-1, 0), _PyTime_ROUND_DOWN),
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(-1.0, (-1, 0), _PyTime_ROUND_DOWN),
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(1e-6, (0, 1), _PyTime_ROUND_DOWN),
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(1e-7, (0, 0), _PyTime_ROUND_DOWN),
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(-1e-6, (-1, 999999), _PyTime_ROUND_DOWN),
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(-1e-7, (-1, 999999), _PyTime_ROUND_DOWN),
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(-1.2, (-2, 800000), _PyTime_ROUND_DOWN),
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(0.9999999, (0, 999999), _PyTime_ROUND_DOWN),
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(0.0000041, (0, 4), _PyTime_ROUND_DOWN),
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(1.1234560, (1, 123456), _PyTime_ROUND_DOWN),
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(1.1234569, (1, 123456), _PyTime_ROUND_DOWN),
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(-0.0000040, (-1, 999996), _PyTime_ROUND_DOWN),
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(-0.0000041, (-1, 999995), _PyTime_ROUND_DOWN),
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(-1.1234560, (-2, 876544), _PyTime_ROUND_DOWN),
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(-1.1234561, (-2, 876543), _PyTime_ROUND_DOWN),
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(0, (0, 0), _PyTime.ROUND_DOWN),
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(-1, (-1, 0), _PyTime.ROUND_DOWN),
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(-1.0, (-1, 0), _PyTime.ROUND_DOWN),
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(1e-6, (0, 1), _PyTime.ROUND_DOWN),
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(1e-7, (0, 0), _PyTime.ROUND_DOWN),
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(-1e-6, (-1, 999999), _PyTime.ROUND_DOWN),
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(-1e-7, (-1, 999999), _PyTime.ROUND_DOWN),
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(-1.2, (-2, 800000), _PyTime.ROUND_DOWN),
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(0.9999999, (0, 999999), _PyTime.ROUND_DOWN),
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(0.0000041, (0, 4), _PyTime.ROUND_DOWN),
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(1.1234560, (1, 123456), _PyTime.ROUND_DOWN),
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(1.1234569, (1, 123456), _PyTime.ROUND_DOWN),
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(-0.0000040, (-1, 999996), _PyTime.ROUND_DOWN),
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(-0.0000041, (-1, 999995), _PyTime.ROUND_DOWN),
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(-1.1234560, (-2, 876544), _PyTime.ROUND_DOWN),
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(-1.1234561, (-2, 876543), _PyTime.ROUND_DOWN),
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# Round away from zero
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(0, (0, 0), _PyTime_ROUND_UP),
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(-1, (-1, 0), _PyTime_ROUND_UP),
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(-1.0, (-1, 0), _PyTime_ROUND_UP),
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(1e-6, (0, 1), _PyTime_ROUND_UP),
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(1e-7, (0, 1), _PyTime_ROUND_UP),
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(-1e-6, (-1, 999999), _PyTime_ROUND_UP),
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(-1e-7, (-1, 999999), _PyTime_ROUND_UP),
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(-1.2, (-2, 800000), _PyTime_ROUND_UP),
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(0.9999999, (1, 0), _PyTime_ROUND_UP),
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(0.0000041, (0, 5), _PyTime_ROUND_UP),
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(1.1234560, (1, 123457), _PyTime_ROUND_UP),
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(1.1234569, (1, 123457), _PyTime_ROUND_UP),
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(-0.0000040, (-1, 999996), _PyTime_ROUND_UP),
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(-0.0000041, (-1, 999995), _PyTime_ROUND_UP),
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(-1.1234560, (-2, 876544), _PyTime_ROUND_UP),
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(-1.1234561, (-2, 876543), _PyTime_ROUND_UP),
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(0, (0, 0), _PyTime.ROUND_UP),
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(-1, (-1, 0), _PyTime.ROUND_UP),
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(-1.0, (-1, 0), _PyTime.ROUND_UP),
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(1e-6, (0, 1), _PyTime.ROUND_UP),
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(1e-7, (0, 1), _PyTime.ROUND_UP),
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(-1e-6, (-1, 999999), _PyTime.ROUND_UP),
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(-1e-7, (-1, 999999), _PyTime.ROUND_UP),
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(-1.2, (-2, 800000), _PyTime.ROUND_UP),
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(0.9999999, (1, 0), _PyTime.ROUND_UP),
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(0.0000041, (0, 5), _PyTime.ROUND_UP),
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(1.1234560, (1, 123457), _PyTime.ROUND_UP),
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(1.1234569, (1, 123457), _PyTime.ROUND_UP),
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(-0.0000040, (-1, 999996), _PyTime.ROUND_UP),
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(-0.0000041, (-1, 999995), _PyTime.ROUND_UP),
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(-1.1234560, (-2, 876544), _PyTime.ROUND_UP),
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(-1.1234561, (-2, 876543), _PyTime.ROUND_UP),
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):
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with self.subTest(obj=obj, round=rnd, timeval=timeval):
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self.assertEqual(pytime_object_to_timeval(obj, rnd), timeval)
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rnd = _PyTime_ROUND_DOWN
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rnd = _PyTime.ROUND_DOWN
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for invalid in self.invalid_values:
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self.assertRaises(OverflowError,
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pytime_object_to_timeval, invalid, rnd)
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@ -669,38 +677,38 @@ def test_timespec(self):
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from _testcapi import pytime_object_to_timespec
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for obj, timespec, rnd in (
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# Round towards zero
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(0, (0, 0), _PyTime_ROUND_DOWN),
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(-1, (-1, 0), _PyTime_ROUND_DOWN),
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(-1.0, (-1, 0), _PyTime_ROUND_DOWN),
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(1e-9, (0, 1), _PyTime_ROUND_DOWN),
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(1e-10, (0, 0), _PyTime_ROUND_DOWN),
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(-1e-9, (-1, 999999999), _PyTime_ROUND_DOWN),
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(-1e-10, (-1, 999999999), _PyTime_ROUND_DOWN),
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(-1.2, (-2, 800000000), _PyTime_ROUND_DOWN),
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(0.9999999999, (0, 999999999), _PyTime_ROUND_DOWN),
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(1.1234567890, (1, 123456789), _PyTime_ROUND_DOWN),
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(1.1234567899, (1, 123456789), _PyTime_ROUND_DOWN),
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(-1.1234567890, (-2, 876543211), _PyTime_ROUND_DOWN),
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(-1.1234567891, (-2, 876543210), _PyTime_ROUND_DOWN),
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(0, (0, 0), _PyTime.ROUND_DOWN),
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(-1, (-1, 0), _PyTime.ROUND_DOWN),
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(-1.0, (-1, 0), _PyTime.ROUND_DOWN),
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(1e-9, (0, 1), _PyTime.ROUND_DOWN),
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(1e-10, (0, 0), _PyTime.ROUND_DOWN),
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(-1e-9, (-1, 999999999), _PyTime.ROUND_DOWN),
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(-1e-10, (-1, 999999999), _PyTime.ROUND_DOWN),
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(-1.2, (-2, 800000000), _PyTime.ROUND_DOWN),
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(0.9999999999, (0, 999999999), _PyTime.ROUND_DOWN),
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(1.1234567890, (1, 123456789), _PyTime.ROUND_DOWN),
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(1.1234567899, (1, 123456789), _PyTime.ROUND_DOWN),
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(-1.1234567890, (-2, 876543211), _PyTime.ROUND_DOWN),
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(-1.1234567891, (-2, 876543210), _PyTime.ROUND_DOWN),
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# Round away from zero
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(0, (0, 0), _PyTime_ROUND_UP),
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(-1, (-1, 0), _PyTime_ROUND_UP),
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(-1.0, (-1, 0), _PyTime_ROUND_UP),
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(1e-9, (0, 1), _PyTime_ROUND_UP),
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(1e-10, (0, 1), _PyTime_ROUND_UP),
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(-1e-9, (-1, 999999999), _PyTime_ROUND_UP),
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(-1e-10, (-1, 999999999), _PyTime_ROUND_UP),
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(-1.2, (-2, 800000000), _PyTime_ROUND_UP),
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(0.9999999999, (1, 0), _PyTime_ROUND_UP),
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(1.1234567890, (1, 123456790), _PyTime_ROUND_UP),
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(1.1234567899, (1, 123456790), _PyTime_ROUND_UP),
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(-1.1234567890, (-2, 876543211), _PyTime_ROUND_UP),
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(-1.1234567891, (-2, 876543210), _PyTime_ROUND_UP),
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(0, (0, 0), _PyTime.ROUND_UP),
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(-1, (-1, 0), _PyTime.ROUND_UP),
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(-1.0, (-1, 0), _PyTime.ROUND_UP),
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(1e-9, (0, 1), _PyTime.ROUND_UP),
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(1e-10, (0, 1), _PyTime.ROUND_UP),
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(-1e-9, (-1, 999999999), _PyTime.ROUND_UP),
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(-1e-10, (-1, 999999999), _PyTime.ROUND_UP),
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(-1.2, (-2, 800000000), _PyTime.ROUND_UP),
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(0.9999999999, (1, 0), _PyTime.ROUND_UP),
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(1.1234567890, (1, 123456790), _PyTime.ROUND_UP),
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(1.1234567899, (1, 123456790), _PyTime.ROUND_UP),
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(-1.1234567890, (-2, 876543211), _PyTime.ROUND_UP),
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(-1.1234567891, (-2, 876543210), _PyTime.ROUND_UP),
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):
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with self.subTest(obj=obj, round=rnd, timespec=timespec):
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self.assertEqual(pytime_object_to_timespec(obj, rnd), timespec)
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rnd = _PyTime_ROUND_DOWN
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rnd = _PyTime.ROUND_DOWN
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for invalid in self.invalid_values:
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self.assertRaises(OverflowError,
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pytime_object_to_timespec, invalid, rnd)
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@ -759,5 +767,91 @@ def test_short_times(self):
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self.assertIs(lt.tm_zone, None)
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@support.cpython_only
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class TestPyTime_t(unittest.TestCase):
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def test_FromSecondsObject(self):
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from _testcapi import pytime_fromsecondsobject
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SEC_TO_NS = 10 ** 9
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MAX_SEC = 2 ** 63 // 10 ** 9
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# Conversion giving the same result for all rounding methods
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for rnd in ALL_ROUNDING_METHODS:
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for obj, ts in (
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# integers
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(0, 0),
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(1, SEC_TO_NS),
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(-3, -3 * SEC_TO_NS),
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# float: subseconds
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(0.0, 0),
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(1e-9, 1),
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(1e-6, 10 ** 3),
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(1e-3, 10 ** 6),
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# float: seconds
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(2.0, 2 * SEC_TO_NS),
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(123.0, 123 * SEC_TO_NS),
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(-7.0, -7 * SEC_TO_NS),
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# nanosecond are kept for value <= 2^23 seconds
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(2**22 - 1e-9, 4194303999999999),
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(2**22, 4194304000000000),
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(2**22 + 1e-9, 4194304000000001),
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(2**23 - 1e-9, 8388607999999999),
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(2**23, 8388608000000000),
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# start loosing precision for value > 2^23 seconds
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(2**23 + 1e-9, 8388608000000002),
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# nanoseconds are lost for value > 2^23 seconds
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(2**24 - 1e-9, 16777215999999998),
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(2**24, 16777216000000000),
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(2**24 + 1e-9, 16777216000000000),
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(2**25 - 1e-9, 33554432000000000),
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(2**25 , 33554432000000000),
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(2**25 + 1e-9, 33554432000000000),
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# close to 2^63 nanoseconds
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(9223372036, 9223372036 * SEC_TO_NS),
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(9223372036.0, 9223372036 * SEC_TO_NS),
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(-9223372036, -9223372036 * SEC_TO_NS),
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(-9223372036.0, -9223372036 * SEC_TO_NS),
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):
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with self.subTest(obj=obj, round=rnd, timestamp=ts):
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self.assertEqual(pytime_fromsecondsobject(obj, rnd), ts)
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with self.subTest(round=rnd):
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with self.assertRaises(OverflowError):
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pytime_fromsecondsobject(9223372037, rnd)
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pytime_fromsecondsobject(9223372037.0, rnd)
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pytime_fromsecondsobject(-9223372037, rnd)
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pytime_fromsecondsobject(-9223372037.0, rnd)
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# Conversion giving different results depending on the rounding method
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UP = _PyTime.ROUND_UP
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DOWN = _PyTime.ROUND_DOWN
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for obj, ts, rnd in (
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# close to zero
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( 1e-10, 1, UP),
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( 1e-10, 0, DOWN),
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(-1e-10, 0, DOWN),
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(-1e-10, -1, UP),
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# test rounding of the last nanosecond
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( 1.1234567899, 1123456790, UP),
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( 1.1234567899, 1123456789, DOWN),
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(-1.1234567899, -1123456789, DOWN),
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(-1.1234567899, -1123456790, UP),
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# close to 1 second
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( 0.9999999999, 1000000000, UP),
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( 0.9999999999, 999999999, DOWN),
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(-0.9999999999, -999999999, DOWN),
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(-0.9999999999, -1000000000, UP),
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):
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with self.subTest(obj=obj, round=rnd, timestamp=ts):
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self.assertEqual(pytime_fromsecondsobject(obj, rnd), ts)
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if __name__ == "__main__":
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unittest.main()
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@ -3378,6 +3378,22 @@ return_result_with_error(PyObject *self, PyObject *args)
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Py_RETURN_NONE;
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}
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static PyObject *
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test_pytime_fromsecondsobject(PyObject *self, PyObject *args)
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{
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PyObject *obj;
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int round;
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_PyTime_t ts;
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if (!PyArg_ParseTuple(args, "Oi", &obj, &round))
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return NULL;
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if (check_time_rounding(round) < 0)
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return NULL;
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if (_PyTime_FromSecondsObject(&ts, obj, round) == -1)
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return NULL;
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return _PyTime_AsNanosecondsObject(ts);
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}
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static PyMethodDef TestMethods[] = {
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{"raise_exception", raise_exception, METH_VARARGS},
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@ -3541,6 +3557,7 @@ static PyMethodDef TestMethods[] = {
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return_null_without_error, METH_NOARGS},
|
||||
{"return_result_with_error",
|
||||
return_result_with_error, METH_NOARGS},
|
||||
{"pytime_fromsecondsobject", test_pytime_fromsecondsobject, METH_VARARGS},
|
||||
{NULL, NULL} /* sentinel */
|
||||
};
|
||||
|
||||
|
|
|
|||
|
|
@ -221,7 +221,7 @@ static PyObject *
|
|||
time_sleep(PyObject *self, PyObject *obj)
|
||||
{
|
||||
_PyTime_t secs;
|
||||
if (_PyTime_FromObject(&secs, obj, _PyTime_ROUND_UP))
|
||||
if (_PyTime_FromSecondsObject(&secs, obj, _PyTime_ROUND_UP))
|
||||
return NULL;
|
||||
if (secs < 0) {
|
||||
PyErr_SetString(PyExc_ValueError,
|
||||
|
|
|
|||
|
|
@ -424,7 +424,7 @@ _PyTime_FromTimespec(_PyTime_t *tp, struct timespec *ts)
|
|||
#endif
|
||||
|
||||
int
|
||||
_PyTime_FromObject(_PyTime_t *t, PyObject *obj, _PyTime_round_t round)
|
||||
_PyTime_FromSecondsObject(_PyTime_t *t, PyObject *obj, _PyTime_round_t round)
|
||||
{
|
||||
if (PyFloat_Check(obj)) {
|
||||
double d, err;
|
||||
|
|
@ -433,8 +433,7 @@ _PyTime_FromObject(_PyTime_t *t, PyObject *obj, _PyTime_round_t round)
|
|||
d = PyFloat_AsDouble(obj);
|
||||
d *= 1e9;
|
||||
|
||||
/* FIXME: use sign */
|
||||
if (round == _PyTime_ROUND_UP)
|
||||
if ((round == _PyTime_ROUND_UP) ^ (d < 0))
|
||||
d = ceil(d);
|
||||
else
|
||||
d = floor(d);
|
||||
|
|
@ -471,6 +470,18 @@ _PyTime_FromObject(_PyTime_t *t, PyObject *obj, _PyTime_round_t round)
|
|||
}
|
||||
}
|
||||
|
||||
PyObject *
|
||||
_PyTime_AsNanosecondsObject(_PyTime_t t)
|
||||
{
|
||||
#ifdef HAVE_LONG_LONG
|
||||
assert(sizeof(PY_LONG_LONG) >= sizeof(_PyTime_t));
|
||||
return PyLong_FromLongLong((PY_LONG_LONG)t);
|
||||
#else
|
||||
assert(sizeof(long) >= sizeof(_PyTime_t));
|
||||
return PyLong_FromLong((long)t);
|
||||
#endif
|
||||
}
|
||||
|
||||
static _PyTime_t
|
||||
_PyTime_Multiply(_PyTime_t t, unsigned int multiply, _PyTime_round_t round)
|
||||
{
|
||||
|
|
|
|||
Loading…
Reference in a new issue