SundanceFileIOChacoPartitioner.hpp

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//                              Sundance
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#ifndef SUNDANCE_FILEIO_CHACOPARTITIONER_H
#define SUNDANCE_FILEIO_CHACOPARTITIONER_H

#include "SundanceDefs.hpp"
#include "SundanceMesh.hpp"
#include "SundanceSerialPartitionerBase.hpp"
#include "PlayaHandle.hpp"

namespace Sundance
{
  /**
   * This partitioner makes a system call to run Chaco, passing partitioning
   * information to it through file IO.
   */
class FileIOChacoPartitioner : public SerialPartitionerBase
  {
  public:

    /** Construct an empty mesh filter object */
    FileIOChacoPartitioner(const std::string& filename,
      bool ignoreGhosts=false);



    /** */
    virtual void getAssignments(const Mesh& mesh, int np, 
      Array<int>& assignments) const ;

    /** */
    void writeGraph(const Mesh& mesh) const ;
    
    /** */
    void runChaco(int np) const ;

  private:

  /** Determine whether a line is empty */
  bool isEmptyLine(const std::string& x) const ;

  /** 
   * Read the next non-empty, non-comment line from a stream
   * @param is the stream from which to get the line
   * @param line upon return, filled in with the line that was read
   * @param tokens array of space-separated tokens in the line
   * @param comment a character indicating that everything after it
   * is a comment
   */
  bool getNextLine(std::istream& is, std::string& line,
    Array<string>& tokens,
    char comment) const ;

    std::string filename_;
  };
}

#endif