/usr/include/freefoam/OpenFOAM/Hasher.H is in libfreefoam-dev 0.1.0+dfsg-1build1.
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========= |
\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
\\ / O peration |
\\ / A nd | Copyright (C) 1991-2010 OpenCFD Ltd.
\\/ M anipulation |
-------------------------------------------------------------------------------
License
This file is part of OpenFOAM.
OpenFOAM is free software: you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
for more details.
You should have received a copy of the GNU General Public License
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InNamespace
Foam
Description
Misc. hashing functions, mostly from Bob Jenkins.
The Jenkins hashing function(s) is similar in speed to Paul Hsieh's
SuperFast hash, but is public domain, supports incremental hashing
and has been reported to have better characteristics.
It is also what postgresql seems to be using.
SeeAlso
http://burtleburtle.net/bob/c/lookup3.c
and HasherInt.H for a specialized version
SourceFiles
Hasher.C
\*---------------------------------------------------------------------------*/
#ifndef Hasher_H
#define Hasher_H
#include <cstddef>
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
namespace Foam
{
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
//- Bob Jenkins's 96-bit mixer hashing function (lookup3)
// @param[in] data - a character stream
// @param[in] len - the number of bytes
// @param[in] seed - the previous hash, or an arbitrary value
unsigned Hasher(const void* data, size_t len, unsigned seed = 0);
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
} // End namespace Foam
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
#endif
// ************************ vim: set sw=4 sts=4 et: ************************ //
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