0027772: Foundation Classes - define Standard_Boolean using C++ type "bool" instead of "unsigned int"

Code has been updated to remove no-op casts and implicit casts to Standard_Boolean.

Places of inproper use of Standard_Boolean instead of Standard_Integer
have been corrected:
- Bnd_Box, Bnd_Box2d
  Bit flags are now defined as private enum
- HLRAlgo_BiPoint, HLRAlgo_EdgesBlock, HLRBRep_EdgeData, HLRBRep_FaceData
  Bit flags are now defined as enum
- HLRAlgo_EdgeStatus, HLRBRep_BiPnt2D, HLRBRep_BiPoint
  Bit flags are now defined as bool fields
- HLRAlgo_PolyData
  Bit flags are now defined as Standard_Integer
- OSD_DirectoryIterator, OSD_FileIterator
  Boolean flag is now defined as Standard_Boolean
- ShapeAnalysis_Surface::SurfaceNewton()
  now returns Standard_Integer (values 0, 1 or 3)
- ChFi2d_FilletAlgo
  now uses TColStd_SequenceOfBoolean instead of TColStd_SequenceOfInteger
  for storing boolean flags

Method IFSelect_Dispatch::PacketsCount() has been dropped from interface.

ShapeFix_Solid::Status() has been fixed to decode requested status
instead of returning integer value.

TopOpeBRepBuild_Builder1 now defines map storing Standard_Boolean values
instead of Standard_Integer.

Persistence for Standard_Boolean type has been corrected
to keep backward compatibility:
- BinMDataStd, BinTools, FSD_BinaryFile

Broken Draw Harness commands vdisplaymode and verasemode have been removed.

BRepMesh_FastDiscretFace::initDataStructure() - workaround old gcc limitations

BRepMesh_IncrementalMesh::clear() - avoid ambiguity

src/IntTools/IntTools_EdgeEdge.cxx

@@ -93,7 +93,7 @@ static
   Standard_Real CurveDeflection(const BRepAdaptor_Curve& theBAC,
                                 const IntTools_Range& theRange);
 static 
-  Standard_Integer IsClosed(const Handle(Geom_Curve)& theCurve,
+  Standard_Boolean IsClosed(const Handle(Geom_Curve)& theCurve,
                             const Standard_Real aT1,
                             const Standard_Real aT2,
                             const Standard_Real theTol,
@@ -1506,26 +1506,21 @@ Standard_Real CurveDeflection(const BRepAdaptor_Curve& theBAC,
 //function : IsClosed
 //purpose  : 
 //=======================================================================
-Standard_Integer IsClosed(const Handle(Geom_Curve)& theCurve,
+Standard_Boolean IsClosed(const Handle(Geom_Curve)& theCurve,
                           const Standard_Real aT1,
                           const Standard_Real aT2,
                           const Standard_Real theTol,
                           const Standard_Real theRes)
 {
-  Standard_Boolean bClosed;
-  Standard_Real aD;
-  gp_Pnt aP1, aP2;
-  //
-  bClosed = Standard_False;
-  if (Abs(aT1 - aT2) < theRes) {
-    return bClosed;
+  if (Abs(aT1 - aT2) < theRes)
+  {
+    return Standard_False;
   }
-  //
+
+  gp_Pnt aP1, aP2;
   theCurve->D0(aT1, aP1);
   theCurve->D0(aT2, aP2);
   //
-  aD = aP1.Distance(aP2);
-  bClosed = aD < theTol;
-  //
-  return bClosed;
+  Standard_Real aD = aP1.Distance(aP2);
+  return aD < theTol;
 }