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REF: use datetime C API instead of getattrs #51368

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REF: use datetime C API instead of getattrs #51368

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13dfb33
REF: use datetime C API instead of getattrs
jbrockmendel Feb 13, 2023
494c918
type checking
jbrockmendel Feb 14, 2023
3e09b25
Merge branch 'main' into ref-pydatetimeimport
jbrockmendel Feb 14, 2023
2154822
troubleshoot CI
jbrockmendel Feb 14, 2023
fb7619d
Merge branch 'main' into ref-pydatetimeimport
jbrockmendel Feb 14, 2023
d3bfd49
Simplify
jbrockmendel Feb 14, 2023
8694ee9
Merge branch 'main' into ref-pydatetimeimport
jbrockmendel Feb 15, 2023
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37 changes: 18 additions & 19 deletions pandas/_libs/tslibs/src/datetime/np_datetime.c
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Original file line number Diff line number Diff line change
Expand Up @@ -27,6 +27,7 @@ This file is derived from NumPy 1.7. See NUMPY_LICENSE.txt
#include <numpy/ndarraytypes.h>
#include "np_datetime.h"

#include "datetime.h"

const npy_datetimestruct _AS_MIN_DTS = {
1969, 12, 31, 23, 59, 50, 776627, 963145, 224193};
Expand Down Expand Up @@ -374,35 +375,33 @@ int convert_pydatetime_to_datetimestruct(PyObject *dtobj,
npy_datetimestruct *out) {
// Assumes that obj is a valid datetime object
PyObject *tmp;
PyObject *obj = (PyObject*)dtobj;

/* Initialize the output to all zeros */
memset(out, 0, sizeof(npy_datetimestruct));
out->month = 1;
out->day = 1;

out->year = PyLong_AsLong(PyObject_GetAttrString(obj, "year"));
out->month = PyLong_AsLong(PyObject_GetAttrString(obj, "month"));
out->day = PyLong_AsLong(PyObject_GetAttrString(obj, "day"));
PyDateTime_IMPORT;

// TODO(anyone): If we can get PyDateTime_IMPORT to work, we could use
// PyDateTime_Check here, and less verbose attribute lookups.

/* Check for time attributes (if not there, return success as a date) */
if (!PyObject_HasAttrString(obj, "hour") ||
!PyObject_HasAttrString(obj, "minute") ||
!PyObject_HasAttrString(obj, "second") ||
!PyObject_HasAttrString(obj, "microsecond")) {
return 0;
if (!PyDate_Check(dtobj)) {
PyErr_SetString(PyExc_TypeError, "Expected date object");
return NULL;
}
PyDateTime_Date *dateobj = (PyDateTime_Date*)dtobj;

out->year = PyDateTime_GET_YEAR(dateobj);
out->month = PyDateTime_GET_MONTH(dateobj);
out->day = PyDateTime_GET_DAY(dateobj);
out->hour = PyDateTime_DATE_GET_HOUR(dateobj);

out->hour = PyLong_AsLong(PyObject_GetAttrString(obj, "hour"));
out->min = PyLong_AsLong(PyObject_GetAttrString(obj, "minute"));
out->sec = PyLong_AsLong(PyObject_GetAttrString(obj, "second"));
out->us = PyLong_AsLong(PyObject_GetAttrString(obj, "microsecond"));
if (PyDateTime_Check(dateobj)) {
PyDateTime_DateTime* obj = (PyDateTime_DateTime*)dateobj;
out->min = PyDateTime_DATE_GET_MINUTE(obj);
out->sec = PyDateTime_DATE_GET_SECOND(obj);
out->us = PyDateTime_DATE_GET_MICROSECOND(obj);

if (PyObject_HasAttrString(obj, "tzinfo")) {
PyObject *offset = extract_utc_offset(obj);
// TODO(py3.10): in py3.10 we can use PyDateTime_DATE_GET_TZINFO
PyObject *offset = extract_utc_offset((PyObject*)obj);
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Is this cast necessary?

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without it i see a bunch of warnings

warning: incompatible pointer types passing 'PyDateTime_DateTime *' to parameter of type 'PyObject *' (aka 'struct _object *') [-Wincompatible-pointer-types]
        PyObject *offset = extract_utc_offset(obj);

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Gotcha makes sense

/* Apply the time zone offset if datetime obj is tz-aware */
if (offset != NULL) {
if (offset == Py_None) {
Expand Down