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C and Python CRC calculations module.

Project description


C and Python (ctypes/cffi-based) CRC calculations module.



PyPI record.






To install run:

python -m pip install --upgrade crc-ct



  • Development is strictly based on tox. To install it run:

    python -m pip install --upgrade tox

Visit development page.

Installation from sources:

clone the sources:

git clone crc-ct

and run:

python -m pip install ./crc-ct

or on development mode:

python -m pip install --editable ./crc-ct


Copyright (c) 1994-2022 Adam Karpierz
Licensed under the zlib/libpng License
Please refer to the accompanying LICENSE file.



1.2.0 (2022-08-02)

  • Add support for Python 3.10 and 3.11

  • Add support for PyPy 3.7, 3.8 and 3.9

  • Setup update (currently based mainly on pyproject.toml).

1.1.0 (2022-01-10)

  • Drop support for Python 3.6.

  • Copyright year update.

  • Setup update.

1.1.0rc4 (2021-07-20)

  • Setup general update and improvement.

1.1.0rc3 (2020-10-18)

  • Add support for Python 3.9.

  • Drop support for Python 3.5.

  • General update and cleanup.

  • Fixed docs setup.

1.0.0rc9 (2020-01-16)

  • Fix for missing include stddef.h (for size_t) in crc.h

  • Another fixes for gcc/Linux.

  • Added ReadTheDocs config file.

  • Setup update.

1.0.0rc6 (2019-11-13)

  • Drop support for Python2.

  • Add support for Python 3.8.

  • Setup update and cleanup.

1.0.0rc2 (2019-05-19)

  • C API has been changed in one place: crc_finalize() -> crc_final().

  • Python API has been changed. It is now finally established in the folowing way; instead of crc.crc_name in most of cases.

  • Python doc-strings update.

  • Fix for error in Python definition of crc.predefined_models.

  • Python tests have been improved, enhanced and fixed.

  • Changes and fixes for support of Python2.

  • Minor setup improvement.

1.0.0b2 (2019-05-13)

  • Python tests have been added.

  • Minor setup improvements.

1.0.0b1 (2019-05-12)

  • Firt beta release.

0.0.1 (2017-05-09)

  • Initial release for Python.

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