10000 Clean up initialisation · python/cpython@a9e8d1a · GitHub
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Clean up initialisation
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+87
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‎Modules/_datetimemodule.c

Lines changed: 87 additions & 77 deletions
Original file line numberDiff line numberDiff line change
@@ -6741,6 +6741,68 @@ datetime_clear(PyObject *module)
67416741
return 0;
67426742
}
67436743

6744+
static PyObject *
6745+
create_timezone_from_delta(int days, int sec, int ms, int normalize)
6746+
{
6747+
PyObject *delta = new_delta(days, sec, ms, normalize);
6748+
if (delta == NULL) {
6749+
return NULL;
6750+
}
6751+
PyObject *tz = create_timezone(delta, NULL);
6752+
Py_DECREF(delta);
6753+
return tz;
6754+
}
6755+
6756+
static int
6757+
init_state(datetime_state *st)
6758+
{
6759+
st->us_per_ms = PyLong_FromLong(1000);
6760+
if (st->us_per_ms == NULL) {
6761+
return -1;
6762+
}
6763+
st->us_per_second = PyLong_FromLong(1000000);
6764+
if (st->us_per_second == NULL) {
6765+
return -1;
6766+
}
6767+
st->us_per_minute = PyLong_FromLong(60000000);
6768+
if (st->us_per_minute == NULL) {
6769+
return -1;
6770+
}
6771+
st->seconds_per_day = PyLong_FromLong(24 * 3600);
6772+
if (st->seconds_per_day == NULL) {
6773+
return -1;
6774+
}
6775+
6776+
/* The rest are too big for 32-bit ints, but even
6777+
* us_per_week fits in 40 bits, so doubles should be exact.
6778+
*/
6779+
st->us_per_hour = PyLong_FromDouble(3600000000.0);
6780+
if (st->us_per_hour == NULL) {
6781+
return -1;
6782+
}
6783+
st->us_per_day = PyLong_FromDouble(86400000000.0);
6784+
if (st->us_per_day == NULL) {
6785+
return -1;
6786+
}
6787+
st->us_per_week = PyLong_FromDouble(604800000000.0);
6788+
if (st->us_per_week == NULL) {
6789+
return -1;
6790+
}
6791+
6792+
/* Init UTC timezone */
6793+
st->utc = create_timezone_from_delta(0, 0, 0, 0);
6794+
if (st->utc == NULL) {
6795+
return -1;
6796+
}
6797+
6798+
/* Init Unix epoch */
6799+
st->epoch = new_datetime(1970, 1, 1, 0, 0, 0, 0, st->utc, 0);
6800+
if (st->epoch == NULL) {
6801+
return -1;
6802+
}
6803+
return 0;
6804+
}
6805+
67446806
static int
67456807
_datetime_exec(PyObject *module)
67466808
{
@@ -6762,23 +6824,23 @@ _datetime_exec(PyObject *module)
67626824

67636825
for (size_t i = 0; i < Py_ARRAY_LENGTH(types); i++) {
67646826
if (PyModule_AddType(module, types[i]) < 0) {
6765-
return -1;
6827+
goto error;
67666828
}
67676829
}
67686830

67696831
if (PyType_Ready(&PyDateTime_IsoCalendarDateType) < 0) {
6770-
return -1;
6832+
goto error;
67716833
}
67726834

67736835
#define DATETIME_ADD_MACRO(dict, c, value_expr) \
67746836
do { \
67756837
PyObject *value = (value_expr); \
67766838
if (value == NULL) { \
6777-
return -1; \
6839+
goto error; \
67786840
} \
67796841
if (PyDict_SetItemString(dict, c, value) < 0) { \
67806842
Py_DECREF(value); \
6781-
return -1; \
6843+
goto error; \
67826844
} \
67836845
Py_DECREF(value); \
67846846
} while(0)
@@ -6810,73 +6872,53 @@ _datetime_exec(PyObject *module)
68106872
999999, Py_None, 0));
68116873
DATETIME_ADD_MACRO(d, "resolution", new_delta(0, 0, 1, 0));
68126874

6813-
/* timezone values */
6814-
d = PyDateTime_TimeZoneType.tp_dict;
6815-
PyObject *delta = new_delta(0, 0, 0, 0);
6816-
if (delta == NULL) {
6817-
return -1;
6818-
}
6819-
68206875
datetime_state *st = STATIC_STATE();
6821-
st->utc = create_timezone(delta, NULL);
6822-
Py_DECREF(delta);
6823-
if (st->utc == NULL) {
6876+
if (init_state(st) < 0) {
68246877
goto error;
68256878
}
6879+
6880+
/* timezone values */
6881+
d = PyDateTime_TimeZoneType.tp_dict;
68266882
if (PyDict_SetItemString(d, "utc", st->utc) < 0) {
68276883
goto error;
68286884
}
68296885

68306886
/* bpo-37642: These attributes are rounded to the nearest minute for backwards
68316887
* compatibility, even though the constructor will accept a wider range of
68326888
* values. This may change in the future.*/
6833-
delta = new_delta(-1, 60, 0, 1); /* -23:59 */
6834-
if (delta == NULL) {
6835-
goto error;
6836-
}
6837-
6838-
PyObject *x = create_timezone(delta, NULL);
6839-
Py_DECREF(delta);
6840-
DATETIME_ADD_MACRO(d, "min", x);
68416889

6842-
delta = new_delta(0, (23 * 60 + 59) * 60, 0, 0); /* +23:59 */
6843-
if (delta == NULL) {
6844-
goto error;
6845-
}
6890+
/* -23:59 */
6891+
PyObject *min = create_timezone_from_delta(-1, 60, 0, 1);
6892+
DATETIME_ADD_MACRO(d, "min", min);
68466893

6847-
x = create_timezone(delta, NULL);
6848-
Py_DECREF(delta);
6849-
DATETIME_ADD_MACRO(d, "max", x);
6894+
/* 23:59 */
6895+
PyObject *max = create_timezone_from_delta(0, (23 * 60 + 59) * 60, 0, 0);
6896+
DATETIME_ADD_MACRO(d, "max", max);
68506897

6851-
/* Epoch */
6852-
st->epoch = new_datetime(1970, 1, 1, 0, 0, 0, 0, st->utc, 0);
6853-
if (st->epoch == NULL) {
6854-
goto error;
6855-
}
6856-
6857-
/* module initialization */
6898+
/* Add module level attributes */
68586899
if (PyModule_AddIntMacro(module, MINYEAR) < 0) {
68596900
goto error;
68606901
}
68616902
if (PyModule_AddIntMacro(module, MAXYEAR) < 0) {
68626903
goto error;
68636904
}
6905+
if (PyModule_AddObjectRef(module, "UTC", st->utc) < 0) {
6906+
goto error;
6907+
}
68646908

6909+
/* At last, set up and add the encapsulated C API */
68656910
PyDateTime_CAPI *capi = get_datetime_capi();
68666911
if (capi == NULL) {
68676912
goto error;
68686913
}
6869-
x = PyCapsule_New(capi, PyDateTime_CAPSULE_NAME, datetime_destructor);
6870-
if (x == NULL) {
6914+
PyObject *capsule = PyCapsule_New(capi, PyDateTime_CAPSULE_NAME,
6915+
datetime_destructor);
6916+
if (capsule == NULL) {
68716917
PyMem_Free(capi);
68726918
goto error;
68736919
}
6874-
6875-
if (PyModule_Add(module, "datetime_CAPI", x) < 0) {
6876-
goto error;
6877-
}
6878-
6879-
if (PyModule_AddObjectRef(module, "UTC", st->utc) < 0) {
6920+
if (PyModule_Add(module, "datetime_CAPI", capsule) < 0) {
6921+
PyMem_Free(capi);
68806922
goto error;
68816923
}
68826924

@@ -6898,45 +6940,13 @@ _datetime_exec(PyObject *module)
68986940
static_assert(DI100Y == 25 * DI4Y - 1, "DI100Y");
68996941
assert(DI100Y == days_before_year(100+1));
69006942

6901-
st->us_per_ms = PyLong_FromLong(1000);
6902-
if (st->us_per_ms == NULL) {
6903-
goto error;
6904-
}
6905-
st->us_per_second = PyLong_FromLong(1000000);
6906-
if (st->us_per_second == NULL) {
6907-
goto error;
6908-
}
6909-
st->us_per_minute = PyLong_FromLong(60000000);
6910-
if (st->us_per_minute == NULL) {
6911-
goto error;
6912-
}
6913-
st->seconds_per_day = PyLong_FromLong(24 * 3600);
6914-
if (st->seconds_per_day == NULL) {
6915-
goto error;
6916-
}
6917-
6918-
/* The rest are too big for 32-bit ints, but even
6919-
* us_per_week fits in 40 bits, so doubles should be exact.
6920-
*/
6921-
st->us_per_hour = PyLong_FromDouble(3600000000.0);
6922-
if (st->us_per_hour == NULL) {
6923-
goto error;
6924-
}
6925-
st->us_per_day = PyLong_FromDouble(86400000000.0);
6926-
if (st->us_per_day == NULL) {
6927-
goto error;
6928-
}
6929-
st->us_per_week = PyLong_FromDouble(604800000000.0);
6930-
if (st->us_per_week == NULL) {
6931-
goto error;
6932-
}
6933-
69346943
return 0;
69356944

69366945
error:
69376946
datetime_clear(module);
69386947
return -1;
69396948
}
6949+
#undef DATETIME_ADD_MACRO
69406950

69416951
static struct PyModuleDef datetimemodule = {
69426952
.m_base = PyModuleDef_HEAD_INIT,

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