Source code for bleak.backends.corebluetooth.utils

from Foundation import NSData
from CoreBluetooth import CBUUID


[docs]def cb_uuid_to_str(_uuid: CBUUID) -> str: """Converts a CoreBluetooth UUID to a Python string. If ``_uuid`` is a 16-bit UUID, it is assumed to be a Bluetooth GATT UUID (``0000xxxx-0000-1000-8000-00805f9b34fb``). Args _uuid: The UUID. Returns: The UUID as a lower case Python string (``xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxx``) """ _uuid = _uuid.UUIDString() if len(_uuid) == 4: return "0000{0}-0000-1000-8000-00805f9b34fb".format(_uuid.lower()) # TODO: Evaluate if this is a necessary method... # elif _is_uuid_16bit_compatible(_uuid): # return _uuid[4:8].lower() else: return _uuid.lower()
def _is_uuid_16bit_compatible(_uuid: str) -> bool: test_uuid = "0000ffff-0000-1000-8000-00805f9b34fb" test_int = _convert_uuid_to_int(test_uuid) uuid_int = _convert_uuid_to_int(_uuid) result_int = uuid_int & test_int return uuid_int == result_int def _convert_uuid_to_int(_uuid: str) -> int: UUID_cb = CBUUID.alloc().initWithString_(_uuid) UUID_data = UUID_cb.data() UUID_bytes = UUID_data.getBytes_length_(None, len(UUID_data)) UUID_int = int.from_bytes(UUID_bytes, byteorder="big") return UUID_int def _convert_int_to_uuid(i: int) -> str: UUID_bytes = i.to_bytes(length=16, byteorder="big") UUID_data = NSData.alloc().initWithBytes_length_(UUID_bytes, len(UUID_bytes)) UUID_cb = CBUUID.alloc().initWithData_(UUID_data) return UUID_cb.UUIDString().lower()