simplified error handling

pandas/_libs/tslibs/conversion.pyx

@@ -408,10 +408,7 @@ cdef _TSObject convert_datetime_to_tsobject(
  if nanos:
  obj.dts.ps = nanos * 1000
 
- try:
- obj.value = npy_datetimestruct_to_datetime(reso, &obj.dts)
- except OverflowError as err:
- raise OutOfBoundsDatetime("Out of bounds nanosecond timestamp") from err
+ obj.value = npy_datetimestruct_to_datetime(reso, &obj.dts)
 
  if obj.tzinfo is not None and not is_utc(obj.tzinfo):
  offset = get_utcoffset(obj.tzinfo, ts)
@@ -526,10 +523,7 @@ cdef _TSObject convert_str_to_tsobject(str ts, tzinfo tz, str unit,
  obj = _TSObject()
  obj.dts = dts
  obj.creso = reso
- try:
- ival = npy_datetimestruct_to_datetime(reso, &dts)
- except OverflowError as err:
- raise OutOfBoundsDatetime from err
+ ival = npy_datetimestruct_to_datetime(reso, &dts)
 
  if out_local == 1:
  obj.tzinfo = timezone(timedelta(minutes=out_tzoffset))

pandas/_libs/tslibs/np_datetime.pyx

@@ -412,10 +412,7 @@ cpdef ndarray astype_overflowsafe(
  else:
  raise
  else:
- try:
- new_value = npy_datetimestruct_to_datetime(to_unit, &dts)
- except OverflowError as err:
- raise OutOfBoundsDatetime from err
+ new_value = npy_datetimestruct_to_datetime(to_unit, &dts)
 
  # Analogous to: iresult[i] = new_value
  (<int64_t*>cnp.PyArray_MultiIter_DATA(mi, 0))[0] = new_value

pandas/_libs/tslibs/period.pxd

@@ -4,4 +4,4 @@ from .np_datetime cimport npy_datetimestruct
 
 
 cdef bint is_period_object(object obj)
-cdef int64_t get_period_ordinal(npy_datetimestruct *dts, int freq)
+cdef int64_t get_period_ordinal(npy_datetimestruct *dts, int freq) except? -1

pandas/_libs/tslibs/period.pyx

@@ -733,9 +733,7 @@ cdef int64_t unix_date_from_ymd(int year, int month, int day) except? -1 nogil:
  dts.year = year
  dts.month = month
  dts.day = day
-
  unix_date = npy_datetimestruct_to_datetime(NPY_FR_D, &dts)
-
  return unix_date
 
 
@@ -749,7 +747,6 @@ cdef int64_t dts_to_year_ordinal(npy_datetimestruct *dts, int to_end) except? -1
  int64_t result
 
  result = npy_datetimestruct_to_datetime(NPY_DATETIMEUNIT.NPY_FR_Y, dts)
-
  if dts.month > to_end:
  return result + 1
  else:
@@ -777,7 +774,7 @@ cdef int get_anchor_month(int freq, int freq_group) noexcept nogil:
 # specifically _dont_ use cdvision or else ordinals near -1 are assigned to
 # incorrect dates GH#19643
 @cython.cdivision(False)
-cdef int64_t get_period_ordinal(npy_datetimestruct *dts, int freq):
+cdef int64_t get_period_ordinal(npy_datetimestruct *dts, int freq) except? -1:
  """
  Generate an ordinal in period space
 

pandas/_libs/tslibs/timestamps.pyx

@@ -579,12 +579,8 @@ cdef class _Timestamp(ABCTimestamp):
 
  if own_tz is not None and not is_utc(own_tz):
  pydatetime_to_dtstruct(self, &dts)
- try:
- # TODO: can + self.nanosecond also overflow here?
- val = npy_datetimestruct_to_datetime(
- self._creso, &dts) + self.nanosecond
- except OverflowError as err:
- raise OutOfBoundsDatetime from err
+ # TODO: can + self.nanosecond also overflow here?
+ val = npy_datetimestruct_to_datetime(self._creso, &dts) + self.nanosecond
  else:
  val = self._value
  return val