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""""""Unpack a utf-8 string encoded as described in MQTT Version
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3.1.1 section 1.5.3 line 177. This is a 16-bit unsigned length
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followed by a utf-8 encoded string.
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Returns
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-------
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int
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Number of bytes consumed
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bytes
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A bytes object extracted from the underlying stream.
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""""""
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num_bytes_consumed, b = decode_bytes(self.__f)
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self.__num_bytes_consumed += num_bytes_consumed
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return num_bytes_consumed, b"
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641,"def unpack_varint(self, max_bytes):
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""""""Decode variable integer using algorithm similar to that described
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in MQTT Version 3.1.1 line 297.
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Parameters
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----------
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max_bytes: int or None
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If a varint cannot be constructed using `max_bytes` or fewer
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from f then raises a `DecodeError`. If None then there is no
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maximum number of bytes.
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Raises
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-------
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DecodeError
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When length is greater than max_bytes.
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UnderflowDecodeError
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When file ends before enough bytes can be read to construct the
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varint.
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Returns
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-------
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int
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Number of bytes consumed.
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int
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Value extracted from `f`.
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""""""
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num_bytes_consumed, value = decode_varint(self.__f, max_bytes)
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self.__num_bytes_consumed += num_bytes_consumed
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return num_bytes_consumed, value"
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642,"def read(self, num_bytes):
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""""""Read `num_bytes` and return them.
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Parameters
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----------
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num_bytes : int
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Number of bytes to extract from the underlying stream.
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Raises
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------
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UnderflowDecodeError
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Raised when a read failed to extract enough bytes from the
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underlying stream to extract the bytes.
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Returns
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-------
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bytes
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A bytes object extracted from underlying stream.
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""""""
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buf = self.__f.read(num_bytes)
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assert len(buf) <= num_bytes
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if len(buf) < num_bytes:
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raise UnderflowDecodeError()
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self.__num_bytes_consumed += num_bytes
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return buf"
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643,"def read(self, max_bytes=1):
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""""""Read at most `max_bytes` from internal buffer.
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Parameters
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-----------
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max_bytes: int
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Maximum number of bytes to read.
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Returns
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--------
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bytes
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Bytes extracted from internal buffer. Length may be less
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than ``max_bytes``. On end-of file returns a bytes object
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with zero-length.
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""""""
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if self.limit is None:
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b = self.__f.read(max_bytes)
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else:
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if self.__num_bytes_consumed + max_bytes > self.limit:
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max_bytes = self.limit - self.__num_bytes_consumed
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b = self.__f.read(max_bytes)
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self.__num_bytes_consumed += len(b)
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return b"
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644,"def read(self, max_bytes=1):
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""""""Read at most `max_bytes` from internal buffer.
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Parameters
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-----------
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