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# coding=utf-8
from datetime import datetime
from datetime import timedelta
from struct import unpack
from .properties import DATA_TYPE_MAP
class DataModel(object):
def __init__(self):
self.data_type_name = None
@staticmethod
def lookup_data_type_name(data_type):
return DATA_TYPE_MAP.get(data_type)
def get_value(self, data_value, data_type_name=None, data_type=None):
if data_type_name:
self.data_type_name = data_type_name
elif data_type:
self.data_type_name = self.lookup_data_type_name(data_type)
else:
raise Exception(
"required arguments not provided to the constructor of the class."
)
if not hasattr(self, self.data_type_name):
return None
value = getattr(self, self.data_type_name)(data_value)
return value
@staticmethod
def PtypUnspecified(data_value):
return data_value
@staticmethod
def PtypNull(_):
return None
@staticmethod
def PtypInteger16(data_value):
return int(data_value.encode("hex"), 16)
@staticmethod
def PtypInteger32(data_value):
return int(data_value.encode("hex"), 32)
@staticmethod
def PtypFloating32(data_value):
return unpack("f", data_value)[0]
@staticmethod
def PtypFloating64(data_value):
return unpack("d", data_value)[0]
@staticmethod
def PtypCurrency(data_value):
return data_value
@staticmethod
def PtypFloatingTime(data_value):
return data_value
@staticmethod
def PtypErrorCode(data_value):
return unpack("I", data_value)[0]
@staticmethod
def PtypBoolean(data_value):
return unpack("B", data_value[0])[0] != 0
@staticmethod
def PtypObject(data_value):
if data_value and b"\x00" in data_value:
data_value = data_value.replace(b"\x00", b"")
return data_value
@staticmethod
def PtypInteger64(data_value):
return unpack("q", data_value)[0]
@staticmethod
def PtypString8(data_value):
if data_value and b"\x00" in data_value:
data_value = data_value.replace(b"\x00", b"")
return data_value
@staticmethod
def PtypString(data_value):
if data_value:
data_value = data_value.decode("utf-16-le", errors="ignore").replace(
"\x00", ""
)
return data_value
@staticmethod
def PtypTime(data_value):
return get_time(data_value)
@staticmethod
def PtypGuid(data_value):
return data_value
@staticmethod
def PtypServerId(data_value):
return data_value
@staticmethod
def PtypRestriction(data_value):
return data_value
@staticmethod
def PtypRuleAction(data_value):
return data_value
@staticmethod
def PtypBinary(data_value):
if data_value and b"\x00" in data_value:
data_value = data_value.replace(b"\x00", b"")
return data_value
@staticmethod
def PtypMultipleInteger16(data_value):
entry_count = int(len(data_value) / 2)
return [unpack("h", bytes[i * 2 : (i + 1) * 2])[0] for i in range(entry_count)]
@staticmethod
def PtypMultipleInteger32(data_value):
entry_count = int(len(data_value) / 4)
return [unpack("i", bytes[i * 4 : (i + 1) * 4])[0] for i in range(entry_count)]
@staticmethod
def PtypMultipleFloating32(data_value):
entry_count = int(len(data_value) / 4)
return [unpack("f", bytes[i * 4 : (i + 1) * 4])[0] for i in range(entry_count)]
@staticmethod
def PtypMultipleFloating64(data_value):
entry_count = int(len(data_value) / 8)
return [unpack("d", bytes[i * 8 : (i + 1) * 8])[0] for i in range(entry_count)]
@staticmethod
def PtypMultipleCurrency(data_value):
return data_value
@staticmethod
def PtypMultipleFloatingTime(data_value):
entry_count = int(len(data_value) / 8)
return [
get_floating_time(bytes[i * 8 : (i + 1) * 8]) for i in range(entry_count)
]
@staticmethod
def PtypMultipleInteger64(data_value):
entry_count = int(len(data_value) / 8)
return [unpack("q", bytes[i * 8 : (i + 1) * 8])[0] for i in range(entry_count)]
@staticmethod
def PtypMultipleString(data_value):
return data_value
# string_list = []
# for item_bytes in data_value:
# if item_bytes and '\x00' in item_bytes:
# item_bytes = item_bytes.replace('\x00', '')
# string_list.append(item_bytes.decode('utf-16-le'))
# return string_list
@staticmethod
def PtypMultipleString8(data_value):
return data_value
@staticmethod
def PtypMultipleTime(data_value):
entry_count = int(len(data_value) / 8)
return [get_time(bytes[i * 8 : (i + 1) * 8]) for i in range(entry_count)]
@staticmethod
def PtypMultipleGuid(data_value):
entry_count = int(len(data_value) / 16)
return [bytes[i * 16 : (i + 1) * 16] for i in range(entry_count)]
@staticmethod
def PtypMultipleBinary(data_value):
return data_value
def get_floating_time(data_value):
return datetime(year=1899, month=12, day=30) + timedelta(
days=unpack("d", data_value)[0]
)
def get_time(data_value):
return datetime(year=1601, month=1, day=1) + timedelta(
microseconds=unpack("q", data_value)[0] / 10.0
)
def get_multi_value_offsets(data_value):
ul_count = unpack("I", data_value[:4])[0]
if ul_count == 1:
rgul_data_offsets = [8]
else:
rgul_data_offsets = [
unpack("Q", bytes[4 + i * 8 : 4 + (i + 1) * 8])[0] for i in range(ul_count)
]
rgul_data_offsets.append(len(data_value))
return ul_count, rgul_data_offsets
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