def definition(self):
fields = Fields(field for number, field in self._meta.model.items()
if getattr(self, self._get_name(number)) is not None)
for number, field in self._unknowns.items():
if getattr(self, self._get_name(number)) is not None:
fields.append(field)
for field in fields:
if isinstance(field, Array):
field.size = field.value_type.size * len(
getattr(self, self._get_name(field.number)))
self._definition.fields = fields
return self._definition
def definition(self):
fields = Fields(
field for number, field in self._meta.model.items()
if getattr(self, self._get_name(number)) is not None
)
for number, field in self._unknowns.items():
if getattr(self, self._get_name(number)) is not None:
fields.append(field)
for field in fields:
if isinstance(field, Array):
field.size = field.value_type.size * len(
getattr(self, self._get_name(field.number)))
self._definition.fields = fields
return self._definition
class Definition(object):
LITTLE = 0
BIG = 1
def __init__(self, header):
self.header = header
self.byte_order = self.BIG
self.number = None
self.fields = Fields()
def __repr__(self):
return '<%s[%d] with %r>' % (
self.__class__.__name__,
self.number,
self.fields
)
@property
def architecture(self):
return {self.LITTLE: "<", self.BIG: ">"}.get(self.byte_order, "<")
@classmethod
def read(cls, definitions, header, read_buffer):
instance = cls(header)
_, instance.byte_order = unpack("<BB", read_buffer.read(2))
instance.number, fields_count = unpack(
"%sHB" % instance.architecture, read_buffer.read(3))
chunk = read_buffer.read(fields_count * Fields.field_size)
instance.fields.read(chunk)
definitions[instance.header.type] = instance
return instance
def write(self, index):
from fit.record.header import DefinitionHeader
chunk = pack("<BBHB", 0, self.LITTLE, self.number, len(self.fields))
return DefinitionHeader(index).write() + chunk + self.fields.write()
def build_message(self, read_buffer):
message_cls = KNOWN_MESSAGES.get(self.number, GenericMessage)
message = message_cls(copy(self))
if isinstance(message, GenericMessage):
message.msg_type = self.number
message.read(read_buffer, copy(self.fields))
return message
def process_timestamp(self, timestamp, offset):
return timestamp, offset
def __init__(self, definition=None, **data):
if not definition:
from fit.record.definition import Definition
from fit.record.header import DefinitionHeader
definition = Definition(DefinitionHeader(self.msg_type))
definition.fields = Fields(self._meta.model.values())
definition.number = self.msg_type
self._data = {}
self._definition = definition
self._unknowns = {}
for key, value in data.items():
self[key] = value
def __init__(self, header):
self.header = header
self.byte_order = self.BIG
self.number = None
self.fields = Fields()
