block_couplings.h

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// -*- C++ -*-
/*! \file
 *  \brief Caclulates the couplings between neighboring blocks given a displacement path
 */
 
#ifndef __block_couplings_h__
#define __block_couplings_h__
 
#include <vector> 
#include "chromabase.h"
 
namespace Chroma
{
  //! Holds info on the coupling of sites that are displaced within a block
  /*!
   * \ingroup ferm
   * @{
   */
  class DisplacedBlock
  {
  public:
    int blk;
    multi1d<int> disp;
    DisplacedBlock(int b, multi1d<int> d) : blk(b),disp(d) {}
    DisplacedBlock() : blk(0) {}
  };
 
  std::vector<int> block_couplings(const int b,
                              const Set& S,const multi1d<int>& disp,
                              const int len);
 
  bool blocks_couple(const multi1d<DisplacedBlock>& b,
                     const Set& S,
                     const int len,int f);
 
  bool blocks_couple(const multi1d<DisplacedBlock>& b,
                     const Set& S,
                     const int len) ;
 
  /*! @} */  // end of group ferm
} // namespace Chroma
 
#endif