KhalimskyCellHashFunctions.h

#pragma once

#if defined(KhalimskyCellHashFunctions_RECURSES)
#error Recursive header files inclusion detected in KhalimskyCellHashFunctions.h
#else // defined(KhalimskyCellHashFunctions_RECURSES)

#define KhalimskyCellHashFunctions_RECURSES

#if !defined KhalimskyCellHashFunctions_h

#define KhalimskyCellHashFunctions_h

// Inclusions
#include <iostream>
#include "DGtal/base/Common.h"
#include "DGtal/topology/KhalimskySpaceND.h"
#include <boost/functional/hash.hpp>


namespace std {
  template < DGtal::Dimension dim,
             typename TInteger >
  struct hash< DGtal::KhalimskyCell< dim, TInteger > >
  {
    size_t operator()(const DGtal::KhalimskyCell< dim, TInteger > & pp) const
    {
      auto const& p = pp.preCell();
      return boost::hash_range(p.coordinates.begin(), p.coordinates.end());
    }
  };

  template < DGtal::Dimension dim,
             typename TInteger >
  struct hash< DGtal::SignedKhalimskyCell< dim, TInteger > >
  {
    size_t operator()(const DGtal::SignedKhalimskyCell< dim, TInteger > & pp) const
    {
      auto const& p = pp.preCell();
      return p.positive
        ? boost::hash_range(p.coordinates.begin(), p.coordinates.end())
        : boost::hash_range(p.coordinates.begin(), p.coordinates.end()) ^ ( (size_t) 0x7a0d3fe9 );
    }
  };

}

namespace boost{
  template < DGtal::Dimension dim,
             typename TInteger >
  struct hash< DGtal::KhalimskyCell< dim, TInteger > >
  {
    size_t operator()(const DGtal::KhalimskyCell< dim, TInteger > & pp) const
    {
      auto const& p = pp.preCell();
      return boost::hash_range(p.coordinates.begin(), p.coordinates.end());
    }
  };

  template < DGtal::Dimension dim,
             typename TInteger >
  struct hash< DGtal::SignedKhalimskyCell< dim, TInteger > >
  {
    size_t operator()(const DGtal::SignedKhalimskyCell< dim, TInteger > & pp) const
    {
      auto const& p = pp.preCell();
      return p.positive
        ? boost::hash_range(p.coordinates.begin(), p.coordinates.end())
        : boost::hash_range(p.coordinates.begin(), p.coordinates.end()) ^ ( (size_t) 0x7a0d3fe9 );
    }
  };

}



#endif // !defined KhalimskyCellHashFunctions_h

#undef KhalimskyCellHashFunctions_RECURSES
#endif // else defined(KhalimskyCellHashFunctions_RECURSES)