Remove unnecessary usage of _TSObject

pandas/_libs/period.pyx

@@ -120,26 +120,6 @@ initialize_daytime_conversion_factor_matrix()
 # Period logic
 #----------------------------------------------------------------------
 
-cdef inline int64_t apply_mult(int64_t period_ord, int64_t mult):
-    """
-    Get freq+multiple ordinal value from corresponding freq-only ordinal value.
-    For example, 5min ordinal will be 1/5th the 1min ordinal (rounding down to
-    integer).
-    """
-    if mult == 1:
-        return period_ord
-
-    return (period_ord - 1) // mult
-
-cdef inline int64_t remove_mult(int64_t period_ord_w_mult, int64_t mult):
-    """
-    Get freq-only ordinal value from corresponding freq+multiple ordinal.
-    """
-    if mult == 1:
-        return period_ord_w_mult
-
-    return period_ord_w_mult * mult + 1;
-
 
 @cython.wraparound(False)
 @cython.boundscheck(False)

pandas/_libs/src/datetime.pxd

@@ -88,11 +88,6 @@ cdef extern from "datetime/np_datetime.h":
     int cmp_pandas_datetimestruct(pandas_datetimestruct *a,
                                   pandas_datetimestruct *b)
 
-    int convert_pydatetime_to_datetimestruct(PyObject *obj,
-                                             pandas_datetimestruct *out,
-                                             PANDAS_DATETIMEUNIT *out_bestunit,
-                                             int apply_tzinfo)
-
     npy_datetime pandas_datetimestruct_to_datetime(PANDAS_DATETIMEUNIT fr,
                                                    pandas_datetimestruct *d) nogil
     void pandas_datetime_to_datetimestruct(npy_datetime val,
@@ -112,12 +107,6 @@ cdef extern from "datetime/np_datetime_strings.h":
                                 PANDAS_DATETIMEUNIT *out_bestunit,
                                 npy_bool *out_special)
 
-    int make_iso_8601_datetime(pandas_datetimestruct *dts, char *outstr, int outlen,
-                               int local, PANDAS_DATETIMEUNIT base, int tzoffset,
-                               NPY_CASTING casting)
-
-    int get_datetime_iso_8601_strlen(int local, PANDAS_DATETIMEUNIT base)
-
     # int parse_python_string(object obj, pandas_datetimestruct *out) except -1
 
 
@@ -152,16 +141,6 @@ cdef inline int _cstring_to_dts(char *val, int length,
     return result
 
 
-cdef inline object _datetime64_to_datetime(int64_t val):
-    cdef pandas_datetimestruct dts
-    pandas_datetime_to_datetimestruct(val, PANDAS_FR_ns, &dts)
-    return _dts_to_pydatetime(&dts)
-
-cdef inline object _dts_to_pydatetime(pandas_datetimestruct *dts):
-    return <object> PyDateTime_FromDateAndTime(dts.year, dts.month,
-                                               dts.day, dts.hour,
-                                               dts.min, dts.sec, dts.us)
-
 cdef inline int64_t _pydatetime_to_dts(object val, pandas_datetimestruct *dts):
     dts.year = PyDateTime_GET_YEAR(val)
     dts.month = PyDateTime_GET_MONTH(val)
@@ -173,17 +152,6 @@ cdef inline int64_t _pydatetime_to_dts(object val, pandas_datetimestruct *dts):
     dts.ps = dts.as = 0
     return pandas_datetimestruct_to_datetime(PANDAS_FR_ns, dts)
 
-cdef inline int64_t _dtlike_to_datetime64(object val,
-                                          pandas_datetimestruct *dts):
-    dts.year = val.year
-    dts.month = val.month
-    dts.day = val.day
-    dts.hour = val.hour
-    dts.min = val.minute
-    dts.sec = val.second
-    dts.us = val.microsecond
-    dts.ps = dts.as = 0
-    return pandas_datetimestruct_to_datetime(PANDAS_FR_ns, dts)
 
 cdef inline int64_t _date_to_datetime64(object val,
                                         pandas_datetimestruct *dts):

pandas/_libs/tslib.pyx

@@ -705,7 +705,6 @@ class Timestamp(_Timestamp):
             pandas_datetimestruct dts
             int64_t value
             object _tzinfo, result, k, v
-            _TSObject ts
 
         # set to naive if needed
         _tzinfo = self.tzinfo
@@ -1009,10 +1008,6 @@ def unique_deltas(ndarray[int64_t] arr):
     return result
 
 
-cdef inline bint _is_multiple(int64_t us, int64_t mult):
-    return us % mult == 0
-
-
 cdef inline bint _cmp_scalar(int64_t lhs, int64_t rhs, int op) except -1:
     if op == Py_EQ:
         return lhs == rhs
@@ -4694,7 +4689,6 @@ def get_date_field(ndarray[int64_t] dtindex, object field):
     field and return an array of these values.
     """
     cdef:
-        _TSObject ts
         Py_ssize_t i, count = 0
         ndarray[int32_t] out
         ndarray[int32_t, ndim=2] _month_offset
@@ -4876,7 +4870,6 @@ def get_start_end_field(ndarray[int64_t] dtindex, object field,
     (defined by frequency).
     """
     cdef:
-        _TSObject ts
         Py_ssize_t i
         int count = 0
         bint is_business = 0
@@ -4925,9 +4918,8 @@ def get_start_end_field(ndarray[int64_t] dtindex, object field,
 
                 pandas_datetime_to_datetimestruct(
                     dtindex[i], PANDAS_FR_ns, &dts)
-                ts = convert_to_tsobject(dtindex[i], None, None, 0, 0)
                 dom = dts.day
-                dow = ts_dayofweek(ts)
+                dow = dayofweek(dts.year, dts.month, dts.day)
 
                 if (dom == 1 and dow < 5) or (dom <= 3 and dow == 0):
                     out[i] = 1
@@ -4951,13 +4943,12 @@ def get_start_end_field(ndarray[int64_t] dtindex, object field,
 
                 pandas_datetime_to_datetimestruct(
                     dtindex[i], PANDAS_FR_ns, &dts)
-                ts = convert_to_tsobject(dtindex[i], None, None, 0, 0)
                 isleap = is_leapyear(dts.year)
                 mo_off = _month_offset[isleap, dts.month - 1]
                 dom = dts.day
                 doy = mo_off + dom
                 ldom = _month_offset[isleap, dts.month]
-                dow = ts_dayofweek(ts)
+                dow = dayofweek(dts.year, dts.month, dts.day)
 
                 if (ldom == doy and dow < 5) or (
                         dow == 4 and (ldom - doy <= 2)):
@@ -4986,9 +4977,8 @@ def get_start_end_field(ndarray[int64_t] dtindex, object field,
 
                 pandas_datetime_to_datetimestruct(
                     dtindex[i], PANDAS_FR_ns, &dts)
-                ts = convert_to_tsobject(dtindex[i], None, None, 0, 0)
                 dom = dts.day
-                dow = ts_dayofweek(ts)
+                dow = dayofweek(dts.year, dts.month, dts.day)
 
                 if ((dts.month - start_month) % 3 == 0) and (
                         (dom == 1 and dow < 5) or (dom <= 3 and dow == 0)):
@@ -5013,13 +5003,12 @@ def get_start_end_field(ndarray[int64_t] dtindex, object field,
 
                 pandas_datetime_to_datetimestruct(
                     dtindex[i], PANDAS_FR_ns, &dts)
-                ts = convert_to_tsobject(dtindex[i], None, None, 0, 0)
                 isleap = is_leapyear(dts.year)
                 mo_off = _month_offset[isleap, dts.month - 1]
                 dom = dts.day
                 doy = mo_off + dom
                 ldom = _month_offset[isleap, dts.month]
-                dow = ts_dayofweek(ts)
+                dow = dayofweek(dts.year, dts.month, dts.day)
 
                 if ((dts.month - end_month) % 3 == 0) and (
                         (ldom == doy and dow < 5) or (
@@ -5049,9 +5038,8 @@ def get_start_end_field(ndarray[int64_t] dtindex, object field,
 
                 pandas_datetime_to_datetimestruct(
                     dtindex[i], PANDAS_FR_ns, &dts)
-                ts = convert_to_tsobject(dtindex[i], None, None, 0, 0)
                 dom = dts.day
-                dow = ts_dayofweek(ts)
+                dow = dayofweek(dts.year, dts.month, dts.day)
 
                 if (dts.month == start_month) and (
                         (dom == 1 and dow < 5) or (dom <= 3 and dow == 0)):
@@ -5076,12 +5064,11 @@ def get_start_end_field(ndarray[int64_t] dtindex, object field,
 
                 pandas_datetime_to_datetimestruct(
                     dtindex[i], PANDAS_FR_ns, &dts)
-                ts = convert_to_tsobject(dtindex[i], None, None, 0, 0)
                 isleap = is_leapyear(dts.year)
                 dom = dts.day
                 mo_off = _month_offset[isleap, dts.month - 1]
                 doy = mo_off + dom
-                dow = ts_dayofweek(ts)
+                dow = dayofweek(dts.year, dts.month, dts.day)
                 ldom = _month_offset[isleap, dts.month]
 
                 if (dts.month == end_month) and (
@@ -5095,7 +5082,6 @@ def get_start_end_field(ndarray[int64_t] dtindex, object field,
 
                 pandas_datetime_to_datetimestruct(
                     dtindex[i], PANDAS_FR_ns, &dts)
-                ts = convert_to_tsobject(dtindex[i], None, None, 0, 0)
                 isleap = is_leapyear(dts.year)
                 mo_off = _month_offset[isleap, dts.month - 1]
                 dom = dts.day
@@ -5117,7 +5103,6 @@ def get_date_name_field(ndarray[int64_t] dtindex, object field):
     name based on requested field (e.g. weekday_name)
     """
     cdef:
-        _TSObject ts
         Py_ssize_t i, count = 0
         ndarray[object] out
         pandas_datetimestruct dts
@@ -5143,10 +5128,6 @@ def get_date_name_field(ndarray[int64_t] dtindex, object field):
     raise ValueError("Field %s not supported" % field)
 
 
-cdef inline int m8_weekday(int64_t val):
-    ts = convert_to_tsobject(val, None, None, 0, 0)
-    return ts_dayofweek(ts)
-
 cdef int64_t DAY_NS = 86400000000000LL
 
 
@@ -5156,11 +5137,9 @@ def date_normalize(ndarray[int64_t] stamps, tz=None):
     cdef:
         Py_ssize_t i, n = len(stamps)
         pandas_datetimestruct dts
-        _TSObject tso
         ndarray[int64_t] result = np.empty(n, dtype=np.int64)
 
     if tz is not None:
-        tso = _TSObject()
         tz = maybe_get_tz(tz)
         result = _normalize_local(stamps, tz)
     else:
@@ -5305,8 +5284,6 @@ def monthrange(int64_t year, int64_t month):
 
     return (dayofweek(year, month, 1), days)
 
-cdef inline int64_t ts_dayofweek(_TSObject ts):
-    return dayofweek(ts.dts.year, ts.dts.month, ts.dts.day)
 
 cdef inline int days_in_month(pandas_datetimestruct dts) nogil:
     return days_per_month_table[is_leapyear(dts.year)][dts.month -1]