/*---------------------------------------------------------------------------*\
  =========                 |
  \\      /  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
    along with OpenFOAM.  If not, see <http://www.gnu.org/licenses/>.

InNamespace
    Foam

Description
    Optimized hashing functions.

SeeAlso
    Hasher.H

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

#ifndef HasherInt_H
#define HasherInt_H

#include "Hasher.H"

#include <cstddef>
#include <stdint.h>    // C++0x uses <cstdint>

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

namespace Foam
{

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

    //- An optimized version of Hasher
    //  @param[in] data   - an array of uint32_t values
    //  @param[in] length - the number of values (not bytes)
    //  @param[in] seed   - the previous hash, or an arbitrary value
    unsigned HasherInt(const uint32_t* data, size_t length, unsigned seed = 0);

    //- An optimized version of Hasher, returning dual hash values
    //  @param[in] data - an array of uint32_t values
    //  @param[in] len  - the number of values (not bytes)
    //  @param[in] hash1 - the previous hash, or an arbitrary value
    //    on output, the primary hash value
    //  @param[in] hash1 - the previous hash, or an arbitrary value
    //    on output, the secondary hash value
    unsigned HasherDual
    (
        const uint32_t* data,
        size_t len,
        unsigned& hash1,
        unsigned& hash2
    );

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

} // End namespace Foam

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

#endif

// ************************ vim: set sw=4 sts=4 et: ************************ //
