135 lines
3.5 KiB
Python
135 lines
3.5 KiB
Python
# Copyright (c) 2014 The Johns Hopkins University/Applied Physics Laboratory
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# All Rights Reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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from binascii import hexlify
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import io
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from kmip.core.errors import ErrorStrings
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def bit_length(num):
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s = bin(num)
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s = s.lstrip('0b')
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return len(s)
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def count_bytes(num):
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bits = bit_length(num)
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num_bytes = int(bits / 8)
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if bits == 0 or bits % 8:
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num_bytes += 1
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return num_bytes
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def print_bytearray(array):
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sbuffer = hexlify_bytearray(array)
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print('buffer: {0}'.format(sbuffer))
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def hexlify_bytearray(array):
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sbuffer = bytes(array[0:])
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return hexlify(sbuffer)
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def is_stream_empty(stream):
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if len(stream.peek(1)) > 0:
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return False
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else:
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return True
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def build_er_error(class_object, descriptor, expected, received,
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attribute=None):
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msg = ErrorStrings.BAD_EXP_RECV
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class_string = ''
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if attribute is None:
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class_string = '{0}'.format(class_object.__name__)
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else:
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class_string = '{0}.{1}'.format(class_object.__name__, attribute)
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return msg.format(class_string, descriptor, expected, received)
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class BytearrayStream(io.RawIOBase):
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def __init__(self, data=None):
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if data is None:
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self.buffer = bytes()
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else:
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self.buffer = bytes(data)
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def read(self, n=None):
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if n is None or n == -1:
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return self.readall()
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length = len(self.buffer)
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if n > length:
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n = length
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data = self.buffer[0:n]
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self.buffer = self.buffer[n:]
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return data
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def readall(self):
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data = self.buffer
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self.buffer = bytes()
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return data
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# TODO (peter-hamilton) Unused, add documentation or cut.
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def readinto(self, b):
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if len(b) <= len(self.buffer):
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num_bytes_to_read = len(b)
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else:
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num_bytes_to_read = len(self.buffer)
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b[:num_bytes_to_read] = self.buffer[:num_bytes_to_read]
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self.buffer = self.buffer[num_bytes_to_read:]
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return num_bytes_to_read
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def peek(self, n=None):
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length = len(self.buffer)
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if n is None or n > length:
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n = length
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return self.buffer[0:n]
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def write(self, b):
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prev_bytes = len(self.buffer)
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self.buffer += b
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return len(self.buffer) - prev_bytes
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def length(self):
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return len(self.buffer)
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def __str__(self):
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sbuffer = bytes(self.buffer[0:])
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return str(hexlify(sbuffer))
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def __len__(self):
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return len(self.buffer)
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def __eq__(self, other):
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if isinstance(other, BytearrayStream):
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if len(self.buffer) != len(other.buffer):
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return False
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elif self.buffer != other.buffer:
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return False
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else:
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return True
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else:
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return NotImplemented
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def __ne__(self, other):
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if isinstance(other, BytearrayStream):
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return not (self == other)
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else:
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return NotImplemented
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