:py:mod:`dissect.util.hash.crc32`
=================================

.. py:module:: dissect.util.hash.crc32


Module Contents
---------------


Functions
~~~~~~~~~

.. autoapisummary::
   :nosignatures:

   dissect.util.hash.crc32.update
   dissect.util.hash.crc32.crc32



.. py:function:: update(crc: int, data: bytes, polynomial: int = 3988292384, table: tuple[int, Ellipsis] | None = None) -> int

   Update CRC32 checksum with data.

   :param crc: The initial value of the checksum.
   :param data: The data to update the checksum with.
   :param polynomial: The (reversed) polynomial to use for the CRC32 calculation. Default is 0xEDB88320 (crc32b).
   :param table: Optional precomputed CRC32 table. If None, a table will be generated using the given polynomial.


.. py:function:: crc32(data: bytes, value: int = 0, polynomial: int = 3988292384, table: tuple[int, Ellipsis] | None = None) -> int

   Calculate CRC32 checksum of some data, with an optional initial value and polynomial.

   :param data: The data to calculate the checksum of.
   :param value: The initial value of the checksum. Default is 0.
   :param polynomial: The (reversed) polynomial to use for the CRC32 calculation. Default is 0xEDB88320 (crc32b).
   :param table: Optional precomputed CRC32 table. If None, a table will be generated using the given polynomial.