Zoltan2_ColoringSolution.hpp

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// @HEADER
// *****************************************************************************
//   Zoltan2: A package of combinatorial algorithms for scientific computing
//
// Copyright 2012 NTESS and the Zoltan2 contributors.
// SPDX-License-Identifier: BSD-3-Clause
// *****************************************************************************
// @HEADER

#ifndef _ZOLTAN2_COLORINGSOLUTION_HPP_
#define _ZOLTAN2_COLORINGSOLUTION_HPP_

#include <Zoltan2_Standards.hpp>
#include <Zoltan2_Solution.hpp>

namespace Zoltan2 {

template <typename Adapter>
  class ColoringSolution : public Solution
{
private: 
  typedef typename Adapter::gno_t gno_t;
  typedef typename Adapter::scalar_t scalar_t;
  typedef typename Adapter::lno_t lno_t;

public:

  ColoringSolution(
    size_t length // This should be equal to nlids. TODO: Optional?
  )
  {
    HELLO;
    length_ = length;
    colors_  = ArrayRCP<int>(length_);
  }

  // Accessor functions, allowing algorithms to get ptrs to solution memory.
  // Algorithms can then load the memory.
  // Non-RCP versions are provided for applications to use.

  inline size_t getColorsSize() {return length_;} // TODO Deprecate or rename? Should always be numVertices?

  inline ArrayRCP<int>  &getColorsRCP()  {return colors_;}

  inline int * getColors()  {return &(*colors_);}

  int getNumColors()  
  { 
    int maxColor = 0;
    for (size_t i=0; i<length_; i++){
      if (colors_[i] > maxColor)
        maxColor = colors_[i];
    }
    return maxColor;
  } 

  //int getGlobalNumColors(); // TODO
 
protected:
  // Coloring solution consists of permutation vector(s).
  size_t length_;
  ArrayRCP<int> colors_;   // zero-based local color array
  //int numColors_;        // Number of colors (local on this proc)
  //int numColorsGlobal_;  // For future distributed coloring
};

}

#endif