mdgridtraits.hh

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#ifndef DUNE_MULTIDOMAINGRID_MDGRIDTRAITS_HH
#define DUNE_MULTIDOMAINGRID_MDGRIDTRAITS_HH
 
#include <vector>
#include <type_traits>
 
#include <dune/grid/multidomaingrid/subdomainset.hh>
#include <dune/grid/multidomaingrid/arraybasedset.hh>
#include <dune/grid/multidomaingrid/singlevalueset.hh>
 
namespace Dune {
 
namespace mdgrid {
 
template<int dim, int codim>
struct AllCodims {
  static const bool supported = true;
};
 
template<int dim, int codim>
struct CellAndVertexCodims {
  static const bool supported = (codim == 0 || codim == dim);
};
 
template<int dim, std::size_t subDomainsPerCell, std::size_t subDomainCount, template<int dim_, int codim> class supportedCodims = AllCodims>
struct ArrayBasedTraits {
 
  typedef int SubDomainIndex;
  static const SubDomainIndex empty = -1;
  static const int dimension = dim;
 
  static const std::size_t maxSubDomainsPerCell = subDomainsPerCell;
 
  static constexpr bool maxSubDomainIndexIsStatic()
  {
    return true;
  }
 
  static constexpr SubDomainIndex maxSubDomainIndex()
  {
    return subDomainCount;
  }
 
  struct EmptyCodimBase {
    typedef int SizeContainer;
    typedef int MultiIndexContainer;
    typedef int SubDomainSet;
  };
 
  template<int codim>
  struct CodimBase {
    static const std::size_t maxSubDomainsPerEntity = (2<<(codim)) * maxSubDomainsPerCell;
    typedef Dune::mdgrid::ArrayBasedSet<SubDomainIndex,maxSubDomainsPerEntity> SubDomainSet;
    typedef std::array<int,maxSubDomainsPerEntity> MultiIndexContainer; // TODO: really int??
    typedef std::array<int,subDomainCount> SizeContainer; // TODO: really int??
  };
 
  template<int codim>
  struct Codim : public std::conditional_t<supportedCodims<dim,codim>::supported,CodimBase<codim>,EmptyCodimBase> {
    static const bool supported = supportedCodims<dim,codim>::supported;
  };
 
  template<int codim, typename SizeContainer>
  void setupSizeContainer(SizeContainer&) const
  {}
 
};
 
 
template<int dim, std::size_t subDomainsPerCell, template<int dim_, int codim> class supportedCodims = AllCodims>
struct DynamicSubDomainCountTraits {
 
  typedef int SubDomainIndex;
  static const SubDomainIndex empty = -1;
  static const int dimension = dim;
 
  static constexpr bool maxSubDomainIndexIsStatic()
  {
    return false;
  }
 
  static const std::size_t maxSubDomainsPerCell = subDomainsPerCell;
 
  SubDomainIndex maxSubDomainIndex() const
  {
    return _subDomainCount;
  }
 
  struct EmptyCodimBase {
    typedef int SizeContainer;
    typedef int MultiIndexContainer;
    typedef int SubDomainSet;
 
    template<typename SC>
    static void setupSizeContainer(const SC&, std::size_t)
    {}
 
  };
 
  template<int codim>
  struct CodimBase {
    static const std::size_t maxSubDomainsPerEntity = (2<<(codim)) * maxSubDomainsPerCell;
    typedef Dune::mdgrid::ArrayBasedSet<SubDomainIndex,maxSubDomainsPerEntity> SubDomainSet;
    typedef std::array<int,maxSubDomainsPerEntity> MultiIndexContainer; // TODO: really int??
    typedef std::vector<int> SizeContainer; // TODO: really int??
 
    static void setupSizeContainer(SizeContainer& container, std::size_t subDomainCount)
    {
      container.resize(subDomainCount);
    }
 
  };
 
  template<int codim>
  struct Codim : public std::conditional_t<supportedCodims<dim,codim>::supported,CodimBase<codim>,EmptyCodimBase> {
    static const bool supported = supportedCodims<dim,codim>::supported;
  };
 
  DynamicSubDomainCountTraits(std::size_t subDomainCount)
    : _subDomainCount(subDomainCount)
  {}
 
  template<int codim, typename SizeContainer>
  void setupSizeContainer(SizeContainer& container) const
  {
    Codim<codim>::setupSizeContainer(container,_subDomainCount);
  }
 
private:
 
  const std::size_t _subDomainCount;
 
};
 
 
template<int dim, std::size_t maxSubDomains, template<int dim_, int codim> class supportedCodims = AllCodims >
struct FewSubDomainsTraits {
 
  typedef unsigned int SubDomainIndex;
  static const SubDomainIndex empty = ~SubDomainIndex(0); // this is not used, but has to be present to make the compiler happy
  static const int dimension = dim;
 
  static const std::size_t maxSubDomainsPerCell = maxSubDomains;
 
  static constexpr bool maxSubDomainIndexIsStatic()
  {
    return true;
  }
 
  static constexpr SubDomainIndex maxSubDomainIndex()
  {
    return maxSubDomains - 1;
  }
 
  struct EmptyCodimBase {
    typedef int SizeContainer;
    typedef int MultiIndexContainer;
    typedef int SubDomainSet;
  };
 
  template<int codim>
  struct CodimBase {
    static const std::size_t maxSubDomainsPerEntity = maxSubDomains;
    typedef Dune::mdgrid::IntegralTypeSubDomainSet<SubDomainIndex,maxSubDomainsPerEntity> SubDomainSet;
    typedef std::array<int,maxSubDomainsPerEntity> MultiIndexContainer;
    typedef std::array<int,maxSubDomains> SizeContainer;
  };
 
  template<int codim>
  struct Codim : public std::conditional_t<supportedCodims<dim,codim>::supported,CodimBase<codim>,EmptyCodimBase> {
    static const bool supported = supportedCodims<dim,codim>::supported;
  };
 
  template<int codim>
  void setupSizeContainer(typename Codim<codim>::SizeContainer&) const
  {}
 
};
 
} // namespace mdrid
 
} // namespace Dune
 
#endif // DUNE_MULTIDOMAINGRID_MDGRIDTRAITS_HH