/*---------------------------------------------------------------------------*\
  =========                 |
  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
   \\    /   O peration     |
    \\  /    A nd           | Copyright (C) 1991-2009 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 2 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
    along with OpenFOAM; if not, write to the Free Software Foundation,
    Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA

\*---------------------------------------------------------------------------*/

#include "HashTable.H"

// * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //

defineTypeNameAndDebug(Foam::HashTableCore, 0);

const Foam::label Foam::HashTableCore::maxTableSize
(
    Foam::HashTableCore::canonicalSize
    (
        Foam::labelMax/2
    )
);

// * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * * //

Foam::label Foam::HashTableCore::canonicalSize(const label size)
{
    if (size < 1)
    {
        return 0;
    }

    // enforce power of two
    unsigned int goodSize = size;

    if (goodSize & (goodSize - 1))
    {
        // brute-force is fast enough
        goodSize = 1;
        while (goodSize < unsigned(size))
        {
            goodSize <<= 1;
        }
    }

    return goodSize;
}


// ************************************************************************* //