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# Copyright (c) 2014 The Johns Hopkins University/Applied Physics Laboratory
# All Rights Reserved.
#
# 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.
from binascii import hexlify
import io
from kmip.core.errors import ErrorStrings
def bit_length(num):
s = bin(num)
s = s.lstrip('0b')
return len(s)
def count_bytes(num):
bits = bit_length(num)
num_bytes = int(bits / 8)
if bits == 0 or bits % 8:
num_bytes += 1
return num_bytes
def print_bytearray(array):
sbuffer = hexlify_bytearray(array)
print('buffer: {0}'.format(sbuffer))
def hexlify_bytearray(array):
sbuffer = bytes(array[0:])
return hexlify(sbuffer)
def is_stream_empty(stream):
if len(stream.peek(1)) > 0:
return False
else:
return True
def build_er_error(class_object, descriptor, expected, received,
attribute=None):
msg = ErrorStrings.BAD_EXP_RECV
class_string = ''
if attribute is None:
class_string = '{0}'.format(class_object.__name__)
else:
class_string = '{0}.{1}'.format(class_object.__name__, attribute)
return msg.format(class_string, descriptor, expected, received)
class BytearrayStream(io.RawIOBase):
def __init__(self, data=None):
if data is None:
self.buffer = bytes()
else:
self.buffer = bytes(data)
def read(self, n=None):
if n is None or n == -1:
return self.readall()
length = len(self.buffer)
if n > length:
n = length
data = self.buffer[0:n]
self.buffer = self.buffer[n:]
return data
def readall(self):
data = self.buffer
self.buffer = bytes()
return data
# TODO (peter-hamilton) Unused, add documentation or cut.
def readinto(self, b):
if len(b) <= len(self.buffer):
num_bytes_to_read = len(b)
else:
num_bytes_to_read = len(self.buffer)
b[:num_bytes_to_read] = self.buffer[:num_bytes_to_read]
self.buffer = self.buffer[num_bytes_to_read:]
return num_bytes_to_read
def peek(self, n=None):
length = len(self.buffer)
if n is None or n > length:
n = length
return self.buffer[0:n]
def write(self, b):
prev_bytes = len(self.buffer)
self.buffer += b
return len(self.buffer) - prev_bytes
def length(self):
return len(self.buffer)
def __str__(self):
sbuffer = bytes(self.buffer[0:])
return str(hexlify(sbuffer))
def __len__(self):
return len(self.buffer)
def __eq__(self, other):
if isinstance(other, BytearrayStream):
if len(self.buffer) != len(other.buffer):
return False
elif self.buffer != other.buffer:
return False
else:
return True
else:
return NotImplemented
def __ne__(self, other):
if isinstance(other, BytearrayStream):
return not (self == other)
else:
return NotImplemented
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