BiIndirectList.H

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    Copyright (C) 2011-2016 OpenFOAM Foundation
    Copyright (C) 2019-2022 OpenCFD Ltd.
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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
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    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/>.
 
Class
    Foam::BiIndirectList
 
Description
    Indexes into negList (negative index) or posList (zero or positive index).
 
SourceFiles
    BiIndirectListI.H
 
\*---------------------------------------------------------------------------*/
 
#ifndef Foam_BiIndirectList_H
#define Foam_BiIndirectList_H
 
#include "List.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
 
/*---------------------------------------------------------------------------*\
                       Class BiIndirectList Declaration
\*---------------------------------------------------------------------------*/
 
template<class T>
class BiIndirectList
{
    // Private Data
 
        UList<T>& posList_;
        UList<T>& negList_;
 
        labelList addr_;
 
public:
 
    // Constructors
 
        //- Construct given the complete lists and the addressing array
        inline BiIndirectList
        (
            const UList<T>& posList,
            const UList<T>& negList,
            const labelUList& addr
        );
 
        //- Construct given the complete list and by transferring addressing
        inline BiIndirectList
        (
            const UList<T>& posList,
            const UList<T>& negList,
            labelList&& addr
        );
 
 
    // Member Functions
 
    // Access
 
        //- True if the list is empty (ie, size() is zero).
        bool empty() const noexcept { return addr_.empty(); }
 
        //- The number of elements in the list
        label size() const noexcept { return addr_.size(); }
 
        //- The list of positive values (without addressing)
        const UList<T>& posList() const noexcept { return posList_; }
 
        //- The list of negative values (without addressing)
        const UList<T>& negList() const noexcept { return negList_; }
 
        //- The addressing used for the list
        const labelList& addressing() const noexcept { return addr_; }
 
        //- Calculate index given whether index is into posList or negList
        static label posIndex(const label i) noexcept { return i; }
        static label negIndex(const label i) noexcept { return (-i-1); }
 
 
    // Edit
 
        //- Copy reset addressing
        inline void resetAddressing(const labelUList& addr);
 
        //- Move reset addressing
        inline void resetAddressing(labelList&& addr);
 
        //- Return the addressed elements as a List
        inline List<T> list() const;
 
 
    // Member Operators
 
        //- Return the addressed elements as a List
        List<T> operator()() const { return this->list(); }
 
        //- Return non-const access to an element
        inline T& operator[](const label i);
 
        //- Return const access to an element
        inline const T& operator[](const label i) const;
 
        //- Assignment to UList of addressed elements
        inline void operator=(const UList<T>& ae);
 
        //- Assignment of all entries to the given value
        inline void operator=(const T& val);
};
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace Foam
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#include "BiIndirectListI.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#endif
 
// ************************************************************************* //