def bytes(self, include_crc = True):
"""bytes(include_crc = True) -> bytearray
Returns a representation of the header in packed binary format.
If include_crc is False, the CRC will be omitted regardless of
the header.crc flag.
"""
buf = bytearray(self._FORMAT.length)
bitpack_into(self._FORMAT, buf, 0, *[self.__dict__[k] for k in self._FIELDS])
pos = len(buf)
buf.extend(self._side_info)
if include_crc and self.crc:
crc = crc16(memoryview(buf)[2:])
buf[pos:pos] = 2 # Inserts two bytes at pos
struct.pack_into('>H', buf, pos, crc)
return buf
def bitpack(self, fmt, offset = 0, *vals):
fmt = isinstance(fmt, _bitpack.formatstr) and fmt or _bitpack.formatstr(fmt)
self._bitpack_check_length(fmt, offset)
return _bitpack.bitpack_into(fmt, self._buffer, self._pos + offset, *vals)