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#ifndef EXTENDING_HH
#define EXTENDING_HH

#include <set>
#include <string>
#include <vector>

#include "cctk.h"



namespace CarpetIOF5 {
  
  using std::set;
  using std::string;
  using std::vector;
  
  
  
  class extending_t {
    
    static char const * const extension_name;
    
    struct extension_t {
      set<string> did_truncate;
      // [mglevel][reflevel][variable];
      vector<vector<vector<int> > > last_output_iteration;
    };
    
    extension_t * m_extension;
    
  public:
    
    static int
    create (void * (* Setup) (tFleshConfig * config,
                              int convlevel,
                              cGH * cctkGH));
    
    static void *
    setup (cGH * cctkGH,
           int (* OutputGH) (cGH const * cctkGH),
           int (* TimeToOutput) (cGH const * cctkGH,
                                 int variable),
           int (* TriggerOutput) (cGH const * cctkGH,
                                  int variable),
           int (* OutputVarAs) (cGH const * cctkGH,
                                char const * varname,
                                char const * alias));
    
    extending_t (cGH const * cctkGH);
    
    bool
    get_did_truncate (string name)
      const;
    
    void
    set_did_truncate (string name);
    
    int
    get_last_output_iteration (int ml, int rl, int vi)
      const;
    
    void
    set_last_output_iteration (int ml, int rl, int vi, int iteration);
    
  private:
    
    void
    resize_last_output_iteration (int ml, int rl, int vi)
      const;
    
  };
  
} // namespace CarpetIOF5

#endif  // #ifndef EXDENDING_HH