Coverage for /pythoncovmergedfiles/medio/medio/usr/local/lib/python3.11/site-packages/google_crc32c/__init__.py: 58%

1# Copyright 2018 Google LLC 

2# 

3# Licensed under the Apache License, Version 2.0 (the "License"); 

4# you may not use this file except in compliance with the License. 

5# You may obtain a copy of the License at 

6# 

7# https://www.apache.org/licenses/LICENSE-2.0 

8# 

9# Unless required by applicable law or agreed to in writing, software 

10# distributed under the License is distributed on an "AS IS" BASIS, 

11# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 

12# See the License for the specific language governing permissions and 

13# limitations under the License. 

14 

15import warnings 

16 

17_SLOW_CRC32C_WARNING = ( 

18 "As the c extension couldn't be imported, `google-crc32c` is using a " 

19 "pure python implementation that is significantly slower. If possible, " 

20 "please configure a c build environment and compile the extension" 

21) 

22 

23# Default to C extension implementation, falling back to pure Python. 

24try: 

25 # Pure-Python unit test sessions test python.py; cext is tested during wheel checks. 

26 from google_crc32c import cext as impl # pragma: NO COVER 

27 

28 implementation = "c" # pragma: NO COVER 

29except ImportError: 

30 from google_crc32c import python as impl # type: ignore 

31 

32 warnings.warn(_SLOW_CRC32C_WARNING, RuntimeWarning) 

33 implementation = "python" 

34 

35extend = impl.extend 

36value = impl.value 

37 

38Checksum = impl.Checksum 

39 

40__all__ = ["extend", "value", "Checksum", "implementation"]