Remove double underscore in header guards (.h & __vtk*_h form)

Used the following command:

find . \( -iname *.h -and -type f \) -exec perl -pi -w -e 's/__vtk(.*)_h/vtk$1_h/g;' {} \;

Fixes many, but not all, clang -Wreserved-id-macro warnings.

Change-Id: I694ff053cb204c70e37b261296f496064d91fc07

Accelerators/Dax/vtkDaxContour.h

@@ -14,8 +14,8 @@
 //
 //=============================================================================
 
-#ifndef __vtkDaxContour_h
-#define __vtkDaxContour_h
+#ifndef vtkDaxContour_h
+#define vtkDaxContour_h
 
 #include "vtkContourFilter.h"
 #include "vtkAcceleratorsDaxModule.h" //required for correct implementation

Accelerators/Dax/vtkDaxContourImpl.h

@@ -14,8 +14,8 @@
 //
 //=============================================================================
 
-#ifndef __vtkDaxContourImpl_h
-#define __vtkDaxContourImpl_h
+#ifndef vtkDaxContourImpl_h
+#define vtkDaxContourImpl_h
 
 // Common code
 #include "vtkDaxConfig.h"

Accelerators/Dax/vtkDaxDetailCommon.h

@@ -14,8 +14,8 @@
 //
 //=============================================================================
 
-#ifndef __vtkDaxDetailCommon_h
-#define __vtkDaxDetailCommon_h
+#ifndef vtkDaxDetailCommon_h
+#define vtkDaxDetailCommon_h
 
 #include "vtkCellTypes.h"
 #include "vtkDataSet.h"

Accelerators/Dax/vtkDaxThreshold.h

@@ -14,8 +14,8 @@
 //
 //=============================================================================
 
-#ifndef __vtkDaxThreshold_h
-#define __vtkDaxThreshold_h
+#ifndef vtkDaxThreshold_h
+#define vtkDaxThreshold_h
 
 #include "vtkThreshold.h"
 #include "vtkAcceleratorsDaxModule.h" //required for correct implementation
@@ -41,4 +41,4 @@ private:
   void operator=(const vtkDaxThreshold&); // Not implemented
 };
 
-#endif // __vtkDaxThreshold_h
+#endif // vtkDaxThreshold_h

Accelerators/Dax/vtkDaxThresholdImpl.h

@@ -14,8 +14,8 @@
 //
 //=============================================================================
 
-#ifndef __vtkDaxThresholdImpl_h
-#define __vtkDaxThresholdImpl_h
+#ifndef vtkDaxThresholdImpl_h
+#define vtkDaxThresholdImpl_h
 
 // Common code
 #include "vtkDaxConfig.h"

Accelerators/Piston/vtkDataSetToPiston.h

@@ -21,8 +21,8 @@
 // .SECTION See Also
 // vtkPistonToDataSet
 
-#ifndef __vtkDataSetToPiston_h
-#define __vtkDataSetToPiston_h
+#ifndef vtkDataSetToPiston_h
+#define vtkDataSetToPiston_h
 
 #include "vtkPistonAlgorithm.h"
 

Accelerators/Piston/vtkPistonAlgorithm.h

@@ -30,8 +30,8 @@
 // class breaks out the downstream requests into separate functions such as
 // ExecuteData and ExecuteInformation.
 
-#ifndef __vtkPistonAlgorithm_h
-#define __vtkPistonAlgorithm_h
+#ifndef vtkPistonAlgorithm_h
+#define vtkPistonAlgorithm_h
 
 #include "vtkAcceleratorsPistonModule.h" // For export macro
 #include "vtkAlgorithm.h"

Accelerators/Piston/vtkPistonContour.h

@@ -16,8 +16,8 @@
 // .SECTION Description
 // This filter uses LANL's Piston library to isocontour on the GPU.
 
-#ifndef __vtkPistonContour_h
-#define __vtkPistonContour_h
+#ifndef vtkPistonContour_h
+#define vtkPistonContour_h
 
 #include "vtkPistonAlgorithm.h"
 

Accelerators/Piston/vtkPistonDataObject.h

@@ -25,8 +25,8 @@
 // .SECTION See Also
 // vtkPistonReference
 
-#ifndef __vtkPistonDataObject_h
-#define __vtkPistonDataObject_h
+#ifndef vtkPistonDataObject_h
+#define vtkPistonDataObject_h
 
 #include "vtkAcceleratorsPistonModule.h" // For export macro
 #include "vtkDataObject.h"

Accelerators/Piston/vtkPistonDataWrangling.h

@@ -18,8 +18,8 @@
 // The vtk_polydata struct is important as that is how piston's polygonal
 // results get brought back to the CPU.
 
-#ifndef __vtkPistonDataWrangling_h
-#define __vtkPistonDataWrangling_h
+#ifndef vtkPistonDataWrangling_h
+#define vtkPistonDataWrangling_h
 
 #include <thrust/version.h>
 #if THRUST_VERSION >= 100600
@@ -67,5 +67,5 @@ struct float4tofloat3 : thrust::unary_function<float4, float3>
 
 } //namespace
 
-#endif //__vtkPistonDataWrangling_h
+#endif //vtkPistonDataWrangling_h
 // VTK-HeaderTest-Exclude: vtkPistonDataWrangling.h

Accelerators/Piston/vtkPistonMapper.h

@@ -18,8 +18,8 @@
 // The important capability it has is to produce images without bringing
 // data back to the CPU.
 
-#ifndef __vtkPistonMapper_h
-#define __vtkPistonMapper_h
+#ifndef vtkPistonMapper_h
+#define vtkPistonMapper_h
 
 #include "vtkAcceleratorsPistonModule.h" // For export macro
 #include "vtkMapper.h"

Accelerators/Piston/vtkPistonMinMax.h

@@ -17,8 +17,8 @@
 // Used in vtkPistonMapper to determine data range as part of color mapping
 // process.
 
-#ifndef __vtkPistonMinMax_h
-#define __vtkPistonMinMax_h
+#ifndef vtkPistonMinMax_h
+#define vtkPistonMinMax_h
 
 #include <thrust/device_vector.h>
 #include <thrust/host_vector.h>
@@ -93,5 +93,5 @@ namespace vtkPiston
   }
 }
 
-#endif // __vtkPistonMinMax_h
+#endif // vtkPistonMinMax_h
 // VTK-HeaderTest-Exclude: vtkPistonMinMax.h

Accelerators/Piston/vtkPistonScalarsColors.h

@@ -18,8 +18,8 @@
 // vtkPistonMapper uses this class to interface vtkScalarsToColors to GPU
 // side code that implements color mapping.
 
-#ifndef __vtkPistonScalarsColors_h
-#define __vtkPistonScalarsColors_h
+#ifndef vtkPistonScalarsColors_h
+#define vtkPistonScalarsColors_h
 
 #include "vtkAcceleratorsPistonModule.h" // For export macro
 #include "vtkObject.h"
@@ -101,4 +101,4 @@ private:
   void operator=(const vtkPistonScalarsColors&);  // Not implemented.
 };
 
-#endif // __vtkPistonScalarsColors_h
+#endif // vtkPistonScalarsColors_h

Accelerators/Piston/vtkPistonSlice.h

@@ -16,8 +16,8 @@
 // .SECTION Description
 // This filter uses LANL's Piston library to slice on the GPU.
 
-#ifndef __vtkPistonSlice_h
-#define __vtkPistonSlice_h
+#ifndef vtkPistonSlice_h