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

.. py:module:: dissect.util.hash.jenkins


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


Functions
~~~~~~~~~

.. autoapisummary::
   :nosignatures:

   dissect.util.hash.jenkins.lookup8
   dissect.util.hash.jenkins.lookup8_quads



.. py:function:: lookup8(key: bytes, level: int) -> int

   Hashes a variable-length key into a 64-bit value.

   This hash function is used in the ESXi kernel.

   .. rubric:: References

   - http://burtleburtle.net/bob/c/lookup8.c


.. py:function:: lookup8_quads(key: bytes, level: int) -> int

   Hashes a key consisting of ``num`` 64-bit integers into a 64-bit value.

   This hash function is used in the ESXi kernel, but unlike :func:`lookup8`, this variant is not compatible with
   any of the original ``lookup8.c`` implementations. The difference between this variant and :func:`lookup8`
   is that in the final step, the value of ``c`` is incremented by the number of quads, not the number
   of bytes in the key. While ``hash2`` in ``lookup8.c`` is also optimized for 64-bit aligned keys,
   (and uses the number of quads as argument for the key size, not bytes) it uses the length of the key
   in bytes to increment ``c`` in the final step.

   .. rubric:: References

   - http://burtleburtle.net/bob/c/lookup8.c
   - ``HashFunc_HashQuads``