50 lines
1.6 KiB
Cython
50 lines
1.6 KiB
Cython
# Copyright 2013-2016 DataStax, Inc.
|
|
#
|
|
# Licensed under the Apache License, Version 2.0 (the "License");
|
|
# you may not use this file except in compliance with the License.
|
|
# You may obtain a copy of the License at
|
|
#
|
|
# http://www.apache.org/licenses/LICENSE-2.0
|
|
#
|
|
# Unless required by applicable law or agreed to in writing, software
|
|
# distributed under the License is distributed on an "AS IS" BASIS,
|
|
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
# See the License for the specific language governing permissions and
|
|
# limitations under the License.
|
|
|
|
"""
|
|
Duplicate module of util.py, with some accelerated functions
|
|
used for deserialization.
|
|
"""
|
|
|
|
from cpython.datetime cimport (
|
|
timedelta_new,
|
|
# cdef inline object timedelta_new(int days, int seconds, int useconds)
|
|
# Create timedelta object using DateTime CAPI factory function.
|
|
# Note, there are no range checks for any of the arguments.
|
|
import_datetime,
|
|
# Datetime C API initialization function.
|
|
# You have to call it before any usage of DateTime CAPI functions.
|
|
)
|
|
|
|
import datetime
|
|
import sys
|
|
|
|
cdef bint is_little_endian
|
|
from cassandra.util import is_little_endian
|
|
|
|
import_datetime()
|
|
|
|
DEF DAY_IN_SECONDS = 86400
|
|
|
|
DATETIME_EPOC = datetime.datetime(1970, 1, 1)
|
|
|
|
|
|
cdef datetime_from_timestamp(double timestamp):
|
|
cdef int days = <int> (timestamp / DAY_IN_SECONDS)
|
|
cdef int64_t days_in_seconds = (<int64_t> days) * DAY_IN_SECONDS
|
|
cdef int seconds = <int> (timestamp - days_in_seconds)
|
|
cdef int microseconds = <int> ((timestamp - days_in_seconds - seconds) * 1000000)
|
|
|
|
return DATETIME_EPOC + timedelta_new(days, seconds, microseconds)
|