/usr/include/paraview/vtkEquivalenceSet.h is in paraview-dev 5.0.1+dfsg1-4.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89  | /*=========================================================================
  Program:   Visualization Toolkit
  Module:    vtkEquivalenceSet.h
  Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
  All rights reserved.
  See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
     This software is distributed WITHOUT ANY WARRANTY; without even
     the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
     PURPOSE.  See the above copyright notice for more information.
=========================================================================*/
// .NAME vtkEquivalenceSet - records groups of integers that are equivalent.
// .SECTION Description
// Useful for connectivity on multiple processes.  Run connectivity
// on each processes, then make touching fragments equivalent.
#ifndef vtkEquivalenceSet_h
#define vtkEquivalenceSet_h
#include "vtkPVVTKExtensionsDefaultModule.h" //needed for exports
#include "vtkObject.h"
class vtkIntArray;
class VTKPVVTKEXTENSIONSDEFAULT_EXPORT vtkEquivalenceSet : public vtkObject
{
public:
  vtkTypeMacro(vtkEquivalenceSet,vtkObject);
  void PrintSelf(ostream& os, vtkIndent indent);
  static vtkEquivalenceSet *New();
  
  void Initialize();
  void AddEquivalence(int id1, int id2);
  // The length of the equivalent array...
  // The Domain of the equivalance map is [0, numberOfMembers).
  int GetNumberOfMembers();
  // Valid only after set is resolved.
  // The range of the map is [0 numberOfResolvedSets)
  int GetNumberOfResolvedSets() { return this->NumberOfResolvedSets;}
  // Return the id of the equivalent set.
  int GetEquivalentSetId(int memberId);
  // Equivalent set ids are reassinged to be sequential.
  // You cannot add anymore equivalences after this is called.
  virtual int ResolveEquivalences();
  void DeepCopy(vtkEquivalenceSet* in);
  // Needed for sending the set over MPI.
  // Be very careful with the pointer.  
  // I guess this means do not write to the memory.
  int* GetPointer();
  // Free unused memory
  void Squeeze();
  // Report used memory
  vtkIdType Capacity();
  // We should fix the pointer API and hide this ivar.
  int Resolved;
  int GetReference(int memberId);
protected:
  vtkEquivalenceSet();
  ~vtkEquivalenceSet();
  int NumberOfResolvedSets;
  // To merge connected framgments that have different ids because they were
  // traversed by different processes or passes.
  vtkIntArray *EquivalenceArray;
  // Return the id of the equivalent set.
  void EquateInternal(int id1, int id2);
private:
  vtkEquivalenceSet(const vtkEquivalenceSet&);  // Not implemented.
  void operator=(const vtkEquivalenceSet&);  // Not implemented.
};
#endif
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