def __init__(self, id_range):
self._id_range = id_range
self._header = MappedBuffer(fields=(
{
"length": "B"
},
{
"command_id": "B"
},
))
class Command(object):
"""
Template of generic command.
"""
# pylint: disable=too-few-public-methods
_ranges = ()
def __init__(self, id_range):
self._id_range = id_range
self._header = MappedBuffer(fields=(
{
"length": "B"
},
{
"command_id": "B"
},
))
def _add_range(self, new_range):
"""
Checks that the range is both formally correct and
doesn't overalp with existing ones.
"""
try:
if (len(new_range) is 2 and 0 <= new_range[0] and
new_range[0] <= new_range[1] and new_range[1] < 255) \
is not True:
return False
for registered_range in self._ranges:
if (registered_range[0] <= new_range[0] and
new_range[0] <= registered_range[1]) or \
(registered_range[0] <= new_range[1] and
new_range[1] <= registered_range[1]):
return False
except TypeError as exception:
logging.error("Exception {0}\n".format(exception) +
"while trying to register exception range: {0}".
format(new_range))
return False
def pack(self, command_id=CMD_PING, data=""):
"""
To be used only by derived classes.
Returns the compacted message.
"""
self._header.length = \
self._header.buffer_length + \
len(data)
self._header.command_id = command_id
return self._header.pack() + data
class Command(object):
"""
Template of generic command.
"""
# pylint: disable=too-few-public-methods
_ranges = ()
def __init__(self, id_range):
self._id_range = id_range
self._header = MappedBuffer(fields=({"length": "B"}, {"command_id": "B"}))
def _add_range(self, new_range):
"""
Checks that the range is both formally correct and
doesn't overalp with existing ones.
"""
try:
if (
len(new_range) is 2 and 0 <= new_range[0] and new_range[0] <= new_range[1] and new_range[1] < 255
) is not True:
return False
for registered_range in self._ranges:
if (registered_range[0] <= new_range[0] and new_range[0] <= registered_range[1]) or (
registered_range[0] <= new_range[1] and new_range[1] <= registered_range[1]
):
return False
except TypeError as exception:
logging.error(
"Exception {0}\n".format(exception) + "while trying to register exception range: {0}".format(new_range)
)
return False
def pack(self, command_id=CMD_PING, data=""):
"""
To be used only by derived classes.
Returns the compacted message.
"""
self._header.length = self._header.buffer_length + len(data)
self._header.command_id = command_id
return self._header.pack() + data
def __init__(self, id_range):
self._id_range = id_range
self._header = MappedBuffer(fields=({"length": "B"}, {"command_id": "B"}))