// Copyright(C) 2008-2017 National Technology & Engineering Solutions
// of Sandia, LLC (NTESS).  Under the terms of Contract DE-NA0003525 with
// NTESS, the U.S. Government retains certain rights in this software.
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// met:
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//       notice, this list of conditions and the following disclaimer.
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//     * Redistributions in binary form must reproduce the above
//       copyright notice, this list of conditions and the following
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#ifndef EXO_BLOCK_H
#define EXO_BLOCK_H

#include "exo_entity.h"
#include <iostream>

#include <string>

template <typename INT> class ExoII_Read;

template <typename INT> class Exo_Block : public Exo_Entity
{
public:
  Exo_Block();
  Exo_Block(int file_id, size_t exo_block_id);
  Exo_Block(int file_id, size_t id, const char *type, size_t num_e, size_t num_npe);
  ~Exo_Block() override;

  std::string Load_Connectivity();
  std::string Free_Connectivity();

  // Access functions:

  const std::string &Elmt_Type() const { return elmt_type; }
  size_t             Num_Nodes_per_Elmt() const { return num_nodes_per_elmt; }

  // Block description access functions:

  const INT *Connectivity() const { return conn; }  // 1-offset connectivity
  const INT *Connectivity(size_t elmt_index) const; // 1-offset connectivity

  std::string Give_Connectivity(size_t &num_e,    // Moves connectivity matrix
                                size_t &npe,      // to conn pointer and sets
                                INT *&  recv_conn); // its own to null.

  // Misc:

  int Check_State() const;

  void Display_Stats(std::ostream & /*s*/ = std::cout) const;
  void Display(std::ostream & /*s*/ = std::cout) const;

private:
  Exo_Block(const Exo_Block &);                  // Not written.
  const Exo_Block &operator=(const Exo_Block &); // Not written.

  void entity_load_params() override;

  EXOTYPE     exodus_type() const override;
  const char *label() const override { return "Element Block"; }
  const char *short_label() const override { return "block"; }

  std::string elmt_type;
  int         num_nodes_per_elmt;

  INT *conn; // Array; holds a matrix, num_elmts by num_nodes_per_elmt.

  friend class ExoII_Read<INT>;
};

#endif
