1 // Copyright (c) 1999-2014 OPEN CASCADE SAS
3 // This file is part of Open CASCADE Technology software library.
5 // This library is free software; you can redistribute it and/or modify it under
6 // the terms of the GNU Lesser General Public License version 2.1 as published
7 // by the Free Software Foundation, with special exception defined in the file
8 // OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
9 // distribution for complete text of the license and disclaimer of any warranty.
11 // Alternatively, this file may be used under the terms of Open CASCADE
12 // commercial license or contractual agreement.
14 #ifndef _MeshVS_SymmetricPairHasher_HeaderFile
15 #define _MeshVS_SymmetricPairHasher_HeaderFile
17 #include <Standard_Type.hxx>
19 typedef std::pair<Standard_Integer, Standard_Integer> MeshVS_NodePair;
21 //! Provides symmetric hash methods pair of integers.
22 struct MeshVS_SymmetricPairHasher
24 //! Computes a hash code for the node pair, in the range [1, theUpperBound]
25 //! @param theNodePair the node pair which hash code is to be computed
26 //! @param theUpperBound the upper bound of the range a computing hash code must be within
27 //! @return a computed hash code, in the range [1, theUpperBound]
28 static Standard_Integer HashCode (const MeshVS_NodePair& theNodePair, const Standard_Integer theUpperBound)
30 return ::HashCode(theNodePair.first + theNodePair.second, theUpperBound);
33 static Standard_Boolean IsEqual (const MeshVS_NodePair& thePair1, const MeshVS_NodePair& thePair2)
35 return (thePair1.first == thePair2.first && thePair1.second == thePair2.second)
36 || (thePair1.first == thePair2.second && thePair1.second == thePair2.first);
40 #endif // _MeshVS_SymmetricPairHasher_HeaderFile