Source code for spinnman.messages.sdp.sdp_message
# Copyright (c) 2017-2019 The University of Manchester
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
from .sdp_header import SDPHeader
[docs]class SDPMessage(object):
""" Wraps up an SDP message with a header and optional data.
"""
__slots__ = [
"_data",
"_offset",
"_sdp_header"]
def __init__(self, sdp_header, data=None, offset=0):
"""
:param sdp_header: The header of the message
:type sdp_header:\
:py:class:`spinnman.messages.sdp.sdp_header.SDPHeader`
:param data: The data of the SDP packet, or None if no data
:type data: bytes or bytearray or None
:param offset: The offset where the valid data starts
:type offset: int
:raise None: No known exceptions are thrown
"""
self._sdp_header = sdp_header
self._data = data
self._offset = offset
@property
def bytestring(self):
""" The bytestring of the message
:return: The bytestring of the message
:rtype: str
"""
if self._data is not None:
return self._sdp_header.bytestring + self._data[self._offset:]
return self._sdp_header.bytestring
[docs] @staticmethod
def from_bytestring(data, offset):
sdp_header = SDPHeader.from_bytestring(data, offset)
return SDPMessage(sdp_header, data, offset + 8)
@property
def sdp_header(self):
""" The header of the packet
:return: An SDP header
:rtype: :py:class:`spinnman.messages.sdp.sdp_header.SDPHeader`
"""
return self._sdp_header
@property
def data(self):
""" The data in the packet
:rtype: bytes or bytearray or None
"""
return self._data
@property
def offset(self):
""" The offset where the valid data starts
:rtype: int
"""
return self._offset