0030550: Coding - Integer overflow in Standard_CString HashCodes

[occt.git] / src / STEPConstruct / STEPConstruct_PointHasher.lxx

// Copyright (c) 1999-2014 OPEN CASCADE SAS
//
// This file is part of Open CASCADE Technology software library.
//
// This library is free software; you can redistribute it and/or modify it under
// the terms of the GNU Lesser General Public License version 2.1 as published
// by the Free Software Foundation, with special exception defined in the file
// OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
// distribution for complete text of the license and disclaimer of any warranty.
//
// Alternatively, this file may be used under the terms of Open CASCADE
// commercial license or contractual agreement.

//=======================================================================
// function : HashCode
// purpose  :
//=======================================================================
inline Standard_Integer STEPConstruct_PointHasher::HashCode (const gp_Pnt&          thePoint,
                                                             const Standard_Integer theUpperBound)
{
  union
  {
    Standard_Real    R[3];
    Standard_Integer I[6];
  } U;

  thePoint.Coord (U.R[0], U.R[1], U.R[2]);

  return ::HashCode (U.I[0] / 23 + U.I[1] / 19 + U.I[2] / 17 + U.I[3] / 13 + U.I[4] / 11 + U.I[5] / 7, theUpperBound);
  //  return ::HashCode((U.I[0]>>4)+(U.I[1]>>3)+(U.I[2]>>2)+(U.I[3]>>1)+(U.I[4]>>4)+(U.I[5]>>3),theUpperBound);
}