Ichthyostega
204e2f55d0
Change data layout to place a metadata record ''behind the'' payload data, and add a checksum to allow for validating dummy calculations and also detect data corruption on data modified after initial generation. By virtue of a marker data word, the presence of a valid metadata record can be confirmed.
62 lines
1.6 KiB
C++
62 lines
1.6 KiB
C++
/*
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HASH-VALUE.hpp - collection of tools and definitions for working with hashes
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Copyright (C)
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2012, Hermann Vosseler <Ichthyostega@web.de>
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**Lumiera** is free software; you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by the
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Free Software Foundation; either version 2 of the License, or (at your
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option) any later version. See the file COPYING for further details.
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*/
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/** @file hash-value.h
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** Hash value types and utilities.
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** This header defines the basic hash value types and provides some simple
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** utilities to support working with hash values.
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**
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** @todo 11/2024 : to ensure a strong and reproducible implementation of hash-chaining,
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** the implementation of LibBoost is used directly. This breaks portability.
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** ///////////////////////////////////////////////////////////////////////////////TICKET #722
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** @see hash-combine.hpp
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** @see HashIndexed
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**
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*/
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#ifndef LIB_HASH_VALUE_H
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#define LIB_HASH_VALUE_H
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#include <stdlib.h>
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/**
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* storage for a Lumiera unique ID,
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* based on a 128bit random number
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*/
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typedef unsigned char lumiera_uid[16];
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typedef lumiera_uid* LumieraUid;
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#ifdef __cplusplus /* =========== C++ definitions ====================== */
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#include <climits>
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namespace lib {
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/** a STL compatible hash value */
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typedef size_t HashVal;
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/** a Lumiera UID */
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typedef lumiera_uid* LUID;
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//////////////////////////////////////TICKET #722 : hash_combine utility extracted into separate header 11/2024
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///
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} // namespace lib
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#endif /* C++ */
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#endif /*LIB_HASH_UTIL_H*/
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