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Hash and cache 128 bytes of UUID

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This commit is contained in:
Josh Wu
2026-03-03 17:53:45 +08:00
parent eb64debb62
commit 28e485b7b3
1 changed files with 14 additions and 9 deletions
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23
bumble/core.py
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@@ -19,6 +19,7 @@ from __future__ import annotations
import dataclasses
import enum
import functools
import struct
from collections.abc import Iterable
from typing import (
@@ -273,13 +274,8 @@ class UUID:
def parse_uuid_2(cls, uuid_as_bytes: bytes, offset: int) -> tuple[int, UUID]:
return offset + 2, cls.from_bytes(uuid_as_bytes[offset : offset + 2])
def to_bytes(self, force_128: bool = False) -> bytes:
'''
Serialize UUID in little-endian byte-order
'''
if not force_128:
return self.uuid_bytes
@functools.cached_property
def uuid_128_bytes(self) -> bytes:
match len(self.uuid_bytes):
case 2:
return self.BASE_UUID + self.uuid_bytes + bytes([0, 0])
@@ -290,6 +286,15 @@ class UUID:
case _:
assert False, "unreachable"
def to_bytes(self, force_128: bool = False) -> bytes:
'''
Serialize UUID in little-endian byte-order
'''
if not force_128:
return self.uuid_bytes
return self.uuid_128_bytes
def to_pdu_bytes(self) -> bytes:
'''
Convert to bytes for use in an ATT PDU.
@@ -318,7 +323,7 @@ class UUID:
def __eq__(self, other: object) -> bool:
if isinstance(other, UUID):
return self.to_bytes(force_128=True) == other.to_bytes(force_128=True)
return self.uuid_128_bytes == other.uuid_128_bytes
if isinstance(other, str):
return UUID(other) == self
@@ -326,7 +331,7 @@ class UUID:
return False
def __hash__(self) -> int:
return hash(self.uuid_bytes)
return hash(self.uuid_128_bytes)
def __str__(self) -> str:
result = self.to_hex_str(separator='-')