/usr/lib/python3/dist-packages/cassandra/marshal.py is in python3-cassandra 2.5.1-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 | # Copyright 2013-2015 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.
import six
import struct
def _make_packer(format_string):
packer = struct.Struct(format_string)
pack = packer.pack
unpack = lambda s: packer.unpack(s)[0]
return pack, unpack
int64_pack, int64_unpack = _make_packer('>q')
int32_pack, int32_unpack = _make_packer('>i')
int16_pack, int16_unpack = _make_packer('>h')
int8_pack, int8_unpack = _make_packer('>b')
uint64_pack, uint64_unpack = _make_packer('>Q')
uint32_pack, uint32_unpack = _make_packer('>I')
uint16_pack, uint16_unpack = _make_packer('>H')
uint8_pack, uint8_unpack = _make_packer('>B')
float_pack, float_unpack = _make_packer('>f')
double_pack, double_unpack = _make_packer('>d')
# Special case for cassandra header
header_struct = struct.Struct('>BBbB')
header_pack = header_struct.pack
header_unpack = header_struct.unpack
# in protocol version 3 and higher, the stream ID is two bytes
v3_header_struct = struct.Struct('>BBhB')
v3_header_pack = v3_header_struct.pack
v3_header_unpack = v3_header_struct.unpack
if six.PY3:
def varint_unpack(term):
val = int(''.join("%02x" % i for i in term), 16)
if (term[0] & 128) != 0:
val -= 1 << (len(term) * 8)
return val
else:
def varint_unpack(term): # noqa
val = int(term.encode('hex'), 16)
if (ord(term[0]) & 128) != 0:
val = val - (1 << (len(term) * 8))
return val
def bitlength(n):
bitlen = 0
while n > 0:
n >>= 1
bitlen += 1
return bitlen
def varint_pack(big):
pos = True
if big == 0:
return b'\x00'
if big < 0:
bytelength = bitlength(abs(big) - 1) // 8 + 1
big = (1 << bytelength * 8) + big
pos = False
revbytes = bytearray()
while big > 0:
revbytes.append(big & 0xff)
big >>= 8
if pos and revbytes[-1] & 0x80:
revbytes.append(0)
revbytes.reverse()
return six.binary_type(revbytes)
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