CompactListList.H

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    Copyright (C) 2011-2016 OpenFOAM Foundation
    Copyright (C) 2019-2021 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.
 
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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::CompactListList
 
Description
    A packed storage unstructured matrix of objects of type <T>
    using an offset table for access.
 
    The offset table is the size of the number of rows+1
    whose elements are the
    accumulated sizes of the rows, i.e.
      - offset[i] gives the index of first element of row i
      - offset[i+1] - offset[i] is the number of elements in row i
 
    Storage is allocated on free-store during construction.
 
    As a special case a null-constructed CompactListList has an empty
    offsets_ (instead of size 1).
 
SourceFiles
    CompactListList.C
    CompactListListI.H
    CompactListListIO.C
 
\*---------------------------------------------------------------------------*/
 
#ifndef CompactListList_H
#define CompactListList_H
 
#include "labelList.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
 
// Forward Declarations
 
template<class T, class Container> class CompactListList;
 
template<class T, class Container> Istream& operator>>
(
    Istream&,
    CompactListList<T, Container>&
);
template<class T, class Container> Ostream& operator<<
(
    Ostream&,
    const CompactListList<T, Container>&
);
 
 
/*---------------------------------------------------------------------------*\
                       Class CompactListList Declaration
\*---------------------------------------------------------------------------*/
 
template<class T, class Container = List<T>>
class CompactListList
{
    // Private Data
 
        label size_;
 
        //- Offset table
        List<label> offsets_;
 
        //- Packed matrix of data
        List<T> m_;
 
 
public:
 
    // Static Member Functions
 
        //- Return a null CompactListList
        inline static const CompactListList<T, Container>& null();
 
 
    // Constructors
 
        //- Default construct
        inline CompactListList();
 
        //- Construct by converting given List<List<T>>
        explicit CompactListList(const List<Container>&);
 
        //- Construct given size of offset table (number of rows)
        //  and number of data.
        inline CompactListList(const label mRows, const label nData);
 
        //- Construct given size of offset table (number of rows),
        //  the number of data and a value for all elements.
        inline CompactListList(const label mRows, const label nData, const T&);
 
        //- Construct given list of row-sizes.
        explicit CompactListList(const labelUList& rowSizes);
 
        //- Construct given list of row-sizes
        CompactListList(const labelUList& rowSizes, const T&);
 
        //- Copy construct
        inline CompactListList(const CompactListList<T, Container>& lst);
 
        //- Move construct
        inline CompactListList(CompactListList<T, Container>&& lst);
 
        //- Construct as copy or re-use as specified.
        inline CompactListList(CompactListList<T, Container>& list, bool reuse);
 
        //- Construct from Istream.
        CompactListList(Istream&);
 
        //- Clone
        inline autoPtr<CompactListList<T, Container>> clone() const;
 
 
    // Member Functions
 
        // Access
 
            //- The primary size (the number of rows)
            inline label size() const noexcept;
 
            //- True if the number of rows is zero
            inline bool empty() const noexcept;
 
            //- Return the offset table (= size()+1)
            inline const List<label>& offsets() const;
 
            //- Return non-const access to the offset table
            inline List<label>& offsets();
 
            //- Return the packed matrix of data
            inline const List<T>& m() const;
 
            //- Return non-const access to the packed matrix of data
            inline List<T>& m();
 
 
        // Edit
 
            //- Reset size of CompactListList.
            //  This form only allows contraction of the CompactListList.
            void setSize(const label mRows);
 
            //- Reset size of CompactListList.
            void setSize(const label mRows, const label nData);
 
            //- Reset sizes of CompactListList and value for new elements.
            void setSize(const label mRows, const label nData, const T&);
 
            //- Reset size of CompactListList.
            void setSize(const labelUList& rowSizes);
 
            //- Reset size of CompactListList.
            //  This form only allows contraction of the CompactListList.
            inline void resize(const label mRows);
 
            //- Reset size of CompactListList.
            inline void resize(const label mRows, const label nData);
 
            //- Reset sizes of CompactListList and value for new elements.
            inline void resize(const label mRows, const label nData, const T&);
 
            //- Reset size of CompactListList.
            inline void resize(const labelUList& rowSizes);
 
            //- Clear the CompactListList, i.e. set sizes to zero.
            void clear();
 
            //- Return sizes (to be used e.g. for construction)
            labelList sizes() const;
 
            //- Swap contents
            void swap(CompactListList<T, Container>& other);
 
            //- Transfer contents into this and annul the argument
            void transfer(CompactListList<T, Container>& list);
 
 
        // Other
 
            //- Return index into m
            inline label index(const label row, const label col) const;
 
            //- Get row for index into m.
            inline label whichRow(const label index) const;
 
            //- Get column index (j) given above row
            inline label whichColumn(const label row, const label index) const;
 
 
    // Member Operators
 
        //- Return subscript-checked row as UList.
        inline UList<T> operator[](const label i);
 
        //- Return const subscript-checked row as UList.
        inline const UList<T> operator[](const label i) const;
 
        //- Return subscript-checked element.
        inline T& operator()(const label i, const label j);
 
        //- Return const subscript-checked element.
        inline const T& operator()(const label i, const label j) const;
 
        //- Return as List<Container>
        List<Container> operator()() const;
 
        //- Assignment of all entries to the given value
        inline void operator=(const T& val);
 
        //- Copy assignment
        inline void operator=(const CompactListList<T, Container>& lst);
 
        //- Move assignment
        inline void operator=(CompactListList<T, Container>&& lst);
 
 
    // IO Operators
 
        //- Read CompactListList from Istream, discarding contents
        //  of existing CompactListList.
        friend Istream& operator>> <T, Container>
        (
            Istream&,
            CompactListList<T, Container>&
        );
 
        // Write CompactListList to Ostream.
        friend Ostream& operator<< <T, Container>
        (
            Ostream&,
            const CompactListList<T, Container>&
        );
};
 
 
// Note: uses default Foam::Swap (move construct/assignment)
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace Foam
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#include "CompactListListI.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#ifdef NoRepository
    #include "CompactListList.C"
    #include "CompactListListIO.C"
#endif
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#endif
 
// ************************************************************************* //