/*=========================================================================

  Program:   Visualization Toolkit
  Module:    vtkEnSightGoldBinaryReader.cxx

  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.

=========================================================================*/
#include "vtkEnSightGoldBinaryReader.h"

#include "vtkByteSwap.h"
#include "vtkCellData.h"
#include "vtkCharArray.h"
#include "vtkFloatArray.h"
#include "vtkMultiBlockDataSet.h"
#include "vtkIdList.h"
#include "vtkImageData.h"
#include "vtkObjectFactory.h"
#include "vtkPointData.h"
#include "vtkPolyData.h"
#include "vtkRectilinearGrid.h"
#include "vtkStructuredGrid.h"
#include "vtkUnstructuredGrid.h"

#include <sys/stat.h>
#include <ctype.h>
#include <vtkstd/string>

vtkCxxRevisionMacro(vtkEnSightGoldBinaryReader, "1.83");
vtkStandardNewMacro(vtkEnSightGoldBinaryReader);

// This is half the precision of an int.
#define MAXIMUM_PART_ID 65536

//----------------------------------------------------------------------------
vtkEnSightGoldBinaryReader::vtkEnSightGoldBinaryReader()
{
  this->IFile = NULL;
  this->FileSize = 0;
  this->Fortran = 0;
  this->NodeIdsListed = 0;
  this->ElementIdsListed = 0;
}

//----------------------------------------------------------------------------
vtkEnSightGoldBinaryReader::~vtkEnSightGoldBinaryReader()
{
  if (this->IFile)
    {
    this->IFile->close();
    delete this->IFile;
    this->IFile = NULL;
    }
}

//----------------------------------------------------------------------------
int vtkEnSightGoldBinaryReader::OpenFile(const char* filename)
{
  if (!filename)
    {
    vtkErrorMacro(<<"Missing filename.");
    return 0;
    }

  // Close file from any previous image
  if (this->IFile)
    {
    this->IFile->close();
    delete this->IFile;
    this->IFile = NULL;
    }
  
  // Open the new file
  vtkDebugMacro(<< "Opening file " << filename);
  struct stat fs;
  if ( !stat( filename, &fs) )
    {
    // Find out how big the file is.
    this->FileSize = (int)(fs.st_size);

#ifdef _WIN32
    this->IFile = new ifstream(filename, ios::in | ios::binary);
#else
    this->IFile = new ifstream(filename, ios::in);
#endif
    }
  else
    {
    vtkErrorMacro("stat failed.");
    return 0;
    }
  if (! this->IFile || this->IFile->fail())
    {
    vtkErrorMacro(<< "Could not open file " << filename); 
    return 0;
    }
  return 1;
}


//----------------------------------------------------------------------------
int vtkEnSightGoldBinaryReader::InitializeFile(const char* fileName)
{
  char line[80], subLine[80];
 
  // Initialize
  //
  if (!fileName)
    {
    vtkErrorMacro("A GeometryFileName must be specified in the case file.");
    return 0;
    }
    
  vtkstd::string sfilename;
  if (this->FilePath)
    {
    sfilename = this->FilePath;
    if (sfilename.at(sfilename.length()-1) != '/')
      {
      sfilename += "/";
      }
    sfilename += fileName;
    vtkDebugMacro("full path to geometry file: " << sfilename.c_str());
    }
  else
    {
    sfilename = fileName;
    }
  
  if (this->OpenFile(sfilename.c_str()) == 0)
    {
    vtkErrorMacro("Unable to open file: " << sfilename.c_str());
    return 0;
    }

  line[0] = '\0';
  subLine[0] = '\0';    
  if ( this->ReadLine( line ) == 0 )
    {
    vtkErrorMacro( "Error with line reading upon file initialization" );
    return 0;
    }
    
  if ( sscanf( line, " %*s %s", subLine ) != 1 )
    {
    vtkErrorMacro( "Error with subline extraction upon file initialization" );
    return 0;
    }
    
  if (strncmp(subLine, "Binary", 6) != 0 &&
      strncmp(subLine, "binary", 6) != 0)
    {
    vtkErrorMacro("This is not a binary data set. Try "
                  << "vtkEnSightGoldReader.");
    return 0;
    }
  return 1;
}

//----------------------------------------------------------------------------
int vtkEnSightGoldBinaryReader::ReadGeometryFile(const char* fileName, int timeStep,
                                                 vtkMultiBlockDataSet *output)
{
  char line[80], subLine[80], nameline[80];
  int partId, realId;
  int lineRead, i;
  
  if (!this->InitializeFile(fileName))
    {
    return 0;
    }
  
  //this will close the file, so we need to reinitialize it
  int numberOfTimeStepsInFile=this->CountTimeSteps();
  
  if (!this->InitializeFile(fileName))
    {
    return 0;
    }
    

  if (this->UseFileSets)
    {
    if (numberOfTimeStepsInFile>1)
      {
      for (i = 0; i < timeStep - 1; i++)
        {
        if (!this->SkipTimeStep())
          {
          return 0;
          }
        }
      }
      
    // use do-while here to initialize 'line' before 'strncmp' is appllied
    // Thanks go to Brancois for care of this issue
    do
      {
      this->ReadLine(line);
      }
    while ( strncmp(line, "BEGIN TIME STEP", 15) != 0 );
    }
  
  // Skip the 2 description lines.
  this->ReadLine(line);
  this->ReadLine(line);
  
  // Read the node id and element id lines.
  this->ReadLine(line);
  sscanf(line, " %*s %*s %s", subLine);
  if (strncmp(subLine, "given", 5) == 0)
    {
    this->NodeIdsListed = 1;
    }
  else if (strncmp(subLine, "ignore", 6) == 0)
    {
    this->NodeIdsListed = 1;
    }
  else
    {
    this->NodeIdsListed = 0;
    }
  
  this->ReadLine(line);
  sscanf(line, " %*s %*s %s", subLine);
  if (strncmp(subLine, "given", 5) == 0)
    {
    this->ElementIdsListed = 1;
    }
  else if (strncmp(subLine, "ignore", 6) == 0)
    {
    this->ElementIdsListed = 1;
    }
  else
    {
    this->ElementIdsListed = 0;
    }
  
  lineRead = this->ReadLine(line); // "extents" or "part"
  if (strncmp(line, "extents", 7) == 0)
    {
    // Skipping the extents.
      this->IFile->seekg(6*sizeof(float), ios::cur);
    lineRead = this->ReadLine(line); // "part"
    }

  while (lineRead > 0 && strncmp(line, "part", 4) == 0)
    {
    this->ReadPartId(&partId);
    partId--; // EnSight starts #ing at 1.
    if (partId < 0 || partId >= MAXIMUM_PART_ID)
      {
      vtkErrorMacro("Invalid part id; check that ByteOrder is set correctly.");
      return 0;
      }
    realId = this->InsertNewPartId(partId);
    
    // Increment the number of geoemtry parts such that the measured geomtry,
    // if any, can be properly combined into a vtkMultiBlockDataSet object.
    // --- fix to bug #7453
    this->NumberOfGeometryParts ++;
    
    this->ReadLine(line); // part description line

    strncpy(nameline, line, 80); // 80 characters in line are allowed
    nameline[79] = '\0'; // Ensure NULL character at end of part name
    char *name = strdup(nameline);

    // fix to bug #0008237
    // The original "return 1" operation upon "strncmp(line, "interface", 9) == 0"
    // was removed here as 'interface' is NOT a keyword of an EnSight Gold file.
    
    this->ReadLine(line);
    
    if (strncmp(line, "block", 5) == 0)
      {
      if (sscanf(line, " %*s %s", subLine) == 1)
        {
        if (strncmp(subLine, "rectilinear", 11) == 0)
          {
          // block rectilinear
          lineRead = this->CreateRectilinearGridOutput(realId, line, name,
                                                       output);
          }
        else if (strncmp(subLine, "uniform", 7) == 0)
          {
          // block uniform
          lineRead = this->CreateImageDataOutput(realId, line, name,
                                                 output);
          }
        else
          {
          // block iblanked
          lineRead = this->CreateStructuredGridOutput(realId, line, name,
                                                      output);
          }
        }
      else
        {
        // block
        lineRead = this->CreateStructuredGridOutput(realId, line, name,
                                                    output);
        }
      }
    else
      {
      lineRead = this->CreateUnstructuredGridOutput(realId, line, name,
                                                    output);
      if (lineRead < 0)
        {
        free(name);
        if (this->IFile)
          {
          this->IFile->close();
          delete this->IFile;
          this->IFile = NULL;
          }
        return 0;
        }
      }
    free(name);
    }
  
  if (this->IFile)
    {
    this->IFile->close();
    delete this->IFile;
    this->IFile = NULL;
    }
  if (lineRead < 0)
    {
    return 0;
    }
  
  return 1;
}


//----------------------------------------------------------------------------
int vtkEnSightGoldBinaryReader::CountTimeSteps()
{
  int count=0;
  while(1)
    {
    int result=this->SkipTimeStep();
    if (result)
      {
      count++;
      }
    else
      {
      break;
      }
    }
  return count;
}

//----------------------------------------------------------------------------
int vtkEnSightGoldBinaryReader::SkipTimeStep()
{
  char line[80], subLine[80];
  int lineRead;

  line[0] = '\0';
  while (strncmp(line, "BEGIN TIME STEP", 15) != 0)
    {
    if (!this->ReadLine(line))
      {
      return 0;
      }
    }
  
  // Skip the 2 description lines.
  this->ReadLine(line);
  this->ReadLine(line);
  
  // Read the node id and element id lines.
  this->ReadLine(line);
  sscanf(line, " %*s %*s %s", subLine);
  if (strncmp(subLine, "given", 5) == 0 ||
      strncmp(subLine, "ignore", 6) == 0)
    {
    this->NodeIdsListed = 1;
    }
  else
    {
    this->NodeIdsListed = 0;
    }
  
  this->ReadLine(line);
  sscanf(line, " %*s %*s %s", subLine);
  if (strncmp(subLine, "given", 5) == 0)
    {
    this->ElementIdsListed = 1;
    }
  else if (strncmp(subLine, "ignore", 6) == 0)
    {
    this->ElementIdsListed = 1;
    }
  else
    {
    this->ElementIdsListed = 0;
    }
  
  lineRead = this->ReadLine(line); // "extents" or "part"
  if (strncmp(line, "extents", 7) == 0)
    {
    // Skipping the extents.
    this->IFile->seekg(6*sizeof(float), ios::cur);
    lineRead = this->ReadLine(line); // "part"
    }
  
  while (lineRead > 0 && strncmp(line, "part", 4) == 0)
    {
    int tmpInt;
    this->ReadPartId(&tmpInt);
    if (tmpInt < 0 || tmpInt > MAXIMUM_PART_ID)
      {
      vtkErrorMacro("Invalid part id; check that ByteOrder is set correctly.");
      return 0;
      }
    this->ReadLine(line); // part description line
    this->ReadLine(line);
    
    if (strncmp(line, "block", 5) == 0)
      {
      if (sscanf(line, " %*s %s", subLine) == 1)
        {
        if (strncmp(subLine, "rectilinear", 11) == 0)
          {
          // block rectilinear
          lineRead = this->SkipRectilinearGrid(line);
          }
        else if (strncmp(subLine, "uniform,", 7) == 0)
          {
          // block uniform
          lineRead = this->SkipImageData(line);
          }
        else
          {
          // block iblanked
          lineRead = this->SkipStructuredGrid(line);
          }
        }
      else
        {
        // block
        lineRead = this->SkipStructuredGrid(line);
        }
      }
    else
      {
      lineRead = this->SkipUnstructuredGrid(line);
      }
    }

  if (lineRead < 0)
    {
    if (this->IFile)
      {
      this->IFile->close();
      delete this->IFile;
      this->IFile = NULL;
      }
    return 0;
    }

  return 1;
}

//----------------------------------------------------------------------------
int vtkEnSightGoldBinaryReader::SkipStructuredGrid(char line[256])
{
  char subLine[80];
  int lineRead;
  int iblanked = 0;
  int dimensions[3];
  int numPts;
  
  if (sscanf(line, " %*s %s", subLine) == 1)
    {
    if (strncmp(subLine, "iblanked", 8) == 0)
      {
      iblanked = 1;
      }
    }

  this->ReadIntArray(dimensions, 3);
  numPts = dimensions[0] * dimensions[1] * dimensions[2];
  if (dimensions[0] < 0 || dimensions[0]*(int)sizeof(int) > this->FileSize ||
      dimensions[0] > this->FileSize ||
      dimensions[1] < 0 || dimensions[1]*(int)sizeof(int) > this->FileSize ||
      dimensions[1] > this->FileSize ||
      dimensions[2] < 0 || dimensions[2]*(int)sizeof(int) > this->FileSize ||
      dimensions[2] > this->FileSize ||
      numPts < 0 || numPts*(int)sizeof(int) > this->FileSize ||
      numPts > this->FileSize)
    {
    vtkErrorMacro("Invalid dimensions read; check that ByteOrder is set correctly.");
    return -1;
    }

  // Skip xCoords, yCoords and zCoords.
  this->IFile->seekg(sizeof(float)*numPts*3, ios::cur);
 
  if (iblanked)
    { // skip iblank array.
    this->IFile->seekg(numPts*sizeof(int), ios::cur);
    }
  
  // reading next line to check for EOF
  lineRead = this->ReadLine(line);
  return lineRead;
}

//----------------------------------------------------------------------------
int vtkEnSightGoldBinaryReader::SkipUnstructuredGrid(char line[256])
{
  int lineRead = 1;
  int i;
  int numElements;
  int cellType;
  
  while(lineRead && strncmp(line, "part", 4) != 0)
    {
    if (strncmp(line, "coordinates", 11) == 0)
      {
      vtkDebugMacro("coordinates");
      int numPts;
      
      this->ReadInt(&numPts);
      if (numPts < 0 || numPts*(int)sizeof(int) > this->FileSize ||
          numPts > this->FileSize)
        {
        vtkErrorMacro("Invalid number of points; check that ByteOrder is set correctly.");
        return -1;
        }
      
      vtkDebugMacro("num. points: " << numPts);
      
      if (this->NodeIdsListed)
        { // skip node ids.
        this->IFile->seekg(sizeof(int)*numPts, ios::cur);
        }
      
      // Skip xCoords, yCoords and zCoords.
      this->IFile->seekg(sizeof(float)*3*numPts, ios::cur);
      }
    else if (strncmp(line, "point", 5) == 0 ||
             strncmp(line, "g_point", 7) == 0)
      {
      vtkDebugMacro("point");
      
      this->ReadInt(&numElements);
      if (numElements < 0 || numElements*(int)sizeof(int) > this->FileSize ||
          numElements > this->FileSize)
        {
        vtkErrorMacro("Invalid number of point cells; check that ByteOrder is set correctly.");
        return -1;
        }
      if (this->ElementIdsListed)
        { // skip element ids.
        this->IFile->seekg(sizeof(int)*numElements, ios::cur);
        }
      
      // Skip nodeIdList.
      this->IFile->seekg(sizeof(int)*numElements, ios::cur);
      }
    else if (strncmp(line, "bar2", 4) == 0 ||
             strncmp(line, "g_bar2", 6) == 0)
      {
      vtkDebugMacro("bar2");
      
      this->ReadInt(&numElements);
      if (numElements < 0 || numElements*(int)sizeof(int) > this->FileSize ||
          numElements > this->FileSize)
        {
        vtkErrorMacro("Invalid number of bar2 cells; check that ByteOrder is set correctly.");
        return -1;
        }
      if (this->ElementIdsListed)
        {
        this->IFile->seekg(sizeof(int)*numElements, ios::cur);
        }

      // Skip nodeIdList.
      this->IFile->seekg(sizeof(int)*2*numElements, ios::cur);
      }
    else if (strncmp(line, "bar3", 4) == 0 ||
             strncmp(line, "g_bar3", 6) == 0)
      {
      vtkDebugMacro("bar3");
      vtkWarningMacro("Only vertex nodes of this element will be read.");

      this->ReadInt(&numElements);
      if (numElements < 0 || numElements*(int)sizeof(int) > this->FileSize ||
          numElements > this->FileSize)
        {
        vtkErrorMacro("Invalid number of bar3 cells; check that ByteOrder is set correctly.");
        return -1;
        }

      if (this->ElementIdsListed)
        {
        this->IFile->seekg(sizeof(int)*numElements, ios::cur);
        }
      
      // Skip nodeIdList.
      this->IFile->seekg(sizeof(int)*2*numElements, ios::cur);
      }
    else if (strncmp(line, "nsided", 6) == 0 ||
             strncmp(line, "g_nsided", 8) == 0)
      {
      vtkDebugMacro("nsided");
      int *numNodesPerElement;
      int numNodes = 0;
      
      //cellType = vtkEnSightReader::NSIDED;
      this->ReadInt(&numElements);
      if (numElements < 0 || numElements*(int)sizeof(int) > this->FileSize ||
          numElements > this->FileSize)
        {
        vtkErrorMacro("Invalid number of nsided cells; check that ByteOrder is set correctly.");
        return -1;
        }
      
      if (this->ElementIdsListed)
        {
        this->IFile->seekg(sizeof(int)*numElements, ios::cur);
        }
      
      numNodesPerElement = new int[numElements];
      this->ReadIntArray(numNodesPerElement, numElements);
      for (i = 0; i < numElements; i++)
        {
        numNodes += numNodesPerElement[i];
        }
      // Skip nodeIdList.
      this->IFile->seekg(sizeof(int)*numNodes, ios::cur);
      delete [] numNodesPerElement;
      }
    else if (strncmp(line, "tria3", 5) == 0 ||
             strncmp(line, "tria6", 5) == 0 ||
             strncmp(line, "g_tria3", 7) == 0 ||
             strncmp(line, "g_tria6", 7) == 0)
      {
      if (strncmp(line, "tria6", 5) == 0 ||
          strncmp(line, "g_tria6", 7) == 0)
        {
        vtkDebugMacro("tria6");
        vtkWarningMacro("Only vertex nodes of this element will be read.");
        cellType = vtkEnSightReader::TRIA6;
        }
      else
        {
        vtkDebugMacro("tria3");
        cellType = vtkEnSightReader::TRIA3;
        }
      
      this->ReadInt(&numElements);
      if (numElements < 0 || numElements*(int)sizeof(int) > this->FileSize ||
          numElements > this->FileSize)
        {
        vtkErrorMacro("Invalid number of triangle cells; check that ByteOrder is set correctly.");
        return -1;
        }
      if (this->ElementIdsListed)
        {
        this->IFile->seekg(sizeof(int)*numElements, ios::cur);
        }

      if (cellType == vtkEnSightReader::TRIA6)
        {
        // Skip nodeIdList.
        this->IFile->seekg(sizeof(int)*6*numElements, ios::cur);
        }
      else
        {
        // Skip nodeIdList.
        this->IFile->seekg(sizeof(int)*3*numElements, ios::cur);
        }
      }
    else if (strncmp(line, "quad4", 5) == 0 ||
             strncmp(line, "quad8", 5) == 0 ||
             strncmp(line, "g_quad4", 7) == 0 ||
             strncmp(line, "g_quad8", 7) == 0)
      {
      if (strncmp(line, "quad8", 5) == 0 ||
          strncmp(line, "g_quad8", 7) == 0)
        {
        vtkDebugMacro("quad8");
        vtkWarningMacro("Only vertex nodes of this element will be read.");
        cellType = vtkEnSightReader::QUAD8;
        }
      else
        {
        vtkDebugMacro("quad4");
        cellType = vtkEnSightReader::QUAD4;
        }
      
      this->ReadInt(&numElements);
      if (numElements < 0 || numElements*(int)sizeof(int) > this->FileSize ||
          numElements > this->FileSize)
        {
        vtkErrorMacro("Invalid number of quad cells; check that ByteOrder is set correctly.");
        return -1;
        }
      if (this->ElementIdsListed)
        {
        this->IFile->seekg(sizeof(int)*numElements, ios::cur);
        }

      if (cellType == vtkEnSightReader::QUAD8)
        {
        // Skip nodeIdList.
        this->IFile->seekg(sizeof(int)*8*numElements, ios::cur);
        }
      else
        {
        // Skip nodeIdList.
        this->IFile->seekg(sizeof(int)*4*numElements, ios::cur);
        }
      }
    else if (strncmp(line, "nfaced", 6) == 0)
      {
      vtkDebugMacro("nfaced");
      int *numFacesPerElement;
      int *numNodesPerFace;
      int numFaces = 0;
      int numNodes = 0;
      
      this->ReadInt(&numElements);
      if (numElements < 0 || numElements*(int)sizeof(int) > this->FileSize ||
          numElements > this->FileSize)
        {
        vtkErrorMacro("Invalid number of nfaced cells; check that ByteOrder is set correctly.");
        return -1;
        }
      
      if (this->ElementIdsListed)
        {
        this->IFile->seekg(sizeof(int)*numElements, ios::cur);
        }
      
      numFacesPerElement = new int[numElements];
      this->ReadIntArray(numFacesPerElement, numElements);
      for (i = 0; i < numElements; i++)
        {
        numFaces += numFacesPerElement[i];
        }
      delete [] numFacesPerElement;
      numNodesPerFace = new int[numFaces];
      this->ReadIntArray(numNodesPerFace, numFaces);
      for (i = 0; i < numFaces; i++)
        {
        numNodes += numNodesPerFace[i];
        }
      // Skip nodeIdList.
      this->IFile->seekg(sizeof(int)*numNodes, ios::cur);
      delete [] numNodesPerFace;
      }
    else if (strncmp(line, "tetra4", 6) == 0 ||
             strncmp(line, "tetra10", 7) == 0 ||
             strncmp(line, "g_tetra4", 8) == 0 ||
             strncmp(line, "g_tetra10", 9) == 0)
      {
      if (strncmp(line, "tetra10", 7) == 0 ||
          strncmp(line, "g_tetra10", 9) == 0)
        {
        vtkDebugMacro("tetra10");
        vtkWarningMacro("Only vertex nodes of this element will be read.");
        cellType = vtkEnSightReader::TETRA10;
        }
      else
        {
        vtkDebugMacro("tetra4");
        cellType = vtkEnSightReader::TETRA4;
        }
      
      this->ReadInt(&numElements);
      if (numElements < 0 || numElements*(int)sizeof(int) > this->FileSize ||
          numElements > this->FileSize)
        {
        vtkErrorMacro("Invalid number of tetrahedral cells; check that ByteOrder is set correctly.");
        return -1;
        }
      if (this->ElementIdsListed)
        {
        this->IFile->seekg(sizeof(int)*numElements, ios::cur);
        }

      if (cellType == vtkEnSightReader::TETRA10)
        {
        // Skip nodeIdList.
        this->IFile->seekg(sizeof(int)*10*numElements, ios::cur);
        }
      else
        {
        // Skip nodeIdList.
        this->IFile->seekg(sizeof(int)*4*numElements, ios::cur);
        }
      }
    else if (strncmp(line, "pyramid5", 8) == 0 ||
             strncmp(line, "pyramid13", 9) == 0 ||
             strncmp(line, "g_pyramid5", 10) == 0 ||
             strncmp(line, "g_pyramid13", 11) == 0)
      {
      if (strncmp(line, "pyramid13", 9) == 0 ||
          strncmp(line, "g_pyramid13", 11) == 0)
        {
        vtkDebugMacro("pyramid13");
        vtkWarningMacro("Only vertex nodes of this element will be read.");
        cellType = vtkEnSightReader::PYRAMID13;
        }
      else
        {
        vtkDebugMacro("pyramid5");
        cellType = vtkEnSightReader::PYRAMID5;
        }
      
      this->ReadInt(&numElements);
      if (numElements < 0 || numElements*(int)sizeof(int) > this->FileSize ||
          numElements > this->FileSize)
        {
        vtkErrorMacro("Invalid number of pyramid cells; check that ByteOrder is set correctly.");
        return -1;
        }
      if (this->ElementIdsListed)
        {
        this->IFile->seekg(sizeof(int)*numElements, ios::cur);
        }

      if (cellType == vtkEnSightReader::PYRAMID13)
        {
        // Skip nodeIdList.
        this->IFile->seekg(sizeof(int)*13*numElements, ios::cur);
        }
      else
        {
        // Skip nodeIdList.
        this->IFile->seekg(sizeof(int)*5*numElements, ios::cur);
        }
      }
    else if (strncmp(line, "hexa8", 5) == 0 ||
             strncmp(line, "hexa20", 6) == 0 ||
             strncmp(line, "g_hexa8", 7) == 0 ||
             strncmp(line, "g_hexa20", 8) == 0)
      {
      if (strncmp(line, "hexa20", 6) == 0 ||
          strncmp(line, "g_hexa20", 8) == 0)
        {
        vtkDebugMacro("hexa20");
        vtkWarningMacro("Only vertex nodes of this element will be read.");
        cellType = vtkEnSightReader::HEXA20;
        }
      else
        {
        vtkDebugMacro("hexa8");
        cellType = vtkEnSightReader::HEXA8;
        }
      
      this->ReadInt(&numElements);
      if (numElements < 0 || numElements*(int)sizeof(int) > this->FileSize ||
          numElements > this->FileSize)
        {
        vtkErrorMacro("Invalid number of hexahedral cells; check that ByteOrder is set correctly.");
        return -1;
        }
      if (this->ElementIdsListed)
        {
        this->IFile->seekg(sizeof(int)*numElements, ios::cur);
        }

      if (cellType == vtkEnSightReader::HEXA20)
        {
        // Skip nodeIdList.
        this->IFile->seekg(sizeof(int)*20*numElements, ios::cur);
        }
      else
        {
        // Skip nodeIdList.
        this->IFile->seekg(sizeof(int)*8*numElements, ios::cur);
        }
      }
    else if (strncmp(line, "penta6", 6) == 0 ||
             strncmp(line, "penta15", 7) == 0 ||
             strncmp(line, "g_penta6", 8) == 0 ||
             strncmp(line, "g_penta15", 9) == 0)
      {
      if (strncmp(line, "penta15", 7) == 0 ||
          strncmp(line, "g_penta15", 9) == 0)
        {
        vtkDebugMacro("penta15");
        vtkWarningMacro("Only vertex nodes of this element will be read.");
        cellType = vtkEnSightReader::PENTA15;
        }
      else
        {
        vtkDebugMacro("penta6");
        cellType = vtkEnSightReader::PENTA6;
        }
      
      this->ReadInt(&numElements);
      if (numElements < 0 || numElements*(int)sizeof(int) > this->FileSize ||
          numElements > this->FileSize)
        {
        vtkErrorMacro("Invalid number of pentagonal cells; check that ByteOrder is set correctly.");
        return -1;
        }
      if (this->ElementIdsListed)
        {
        this->IFile->seekg(sizeof(int)*numElements, ios::cur);
        }

      if (cellType == vtkEnSightReader::PENTA15)
        {
        // Skip nodeIdList.
        this->IFile->seekg(sizeof(int)*15*numElements, ios::cur);
        }
      else
        {
        // Skip nodeIdList.
        this->IFile->seekg(sizeof(int)*6*numElements, ios::cur);
        }
      }
    else if (strncmp(line, "END TIME STEP", 13) == 0)
      {
      return 1;
      }
    else
      {
      vtkErrorMacro("undefined geometry file line");
      return -1;
      }
    lineRead = this->ReadLine(line);
    }
  return lineRead;
}

//----------------------------------------------------------------------------
int vtkEnSightGoldBinaryReader::SkipRectilinearGrid(char line[256])
{
  char subLine[80];
  int lineRead;
  int iblanked = 0;
  int dimensions[3];
  int numPts;
  
  if (sscanf(line, " %*s %*s %s", subLine) == 1)
    {
    if (strncmp(subLine, "iblanked", 8) == 0)
      {
      iblanked = 1;
      }
    }

  this->ReadIntArray(dimensions, 3);
  if (dimensions[0] < 0 || dimensions[0]*(int)sizeof(int) > this->FileSize ||
      dimensions[0] > this->FileSize ||
      dimensions[1] < 0 || dimensions[1]*(int)sizeof(int) > this->FileSize ||
      dimensions[1] > this->FileSize ||
      dimensions[2] < 0 || dimensions[2]*(int)sizeof(int) > this->FileSize ||
      dimensions[2] > this->FileSize ||
      (dimensions[0]+dimensions[1]+dimensions[2]) < 0 ||
      (dimensions[0]+dimensions[1]+dimensions[2])*(int)sizeof(int) > this->FileSize ||
      (dimensions[0]+dimensions[1]+dimensions[2]) > this->FileSize)
    {
    vtkErrorMacro("Invalid dimensions read; check that BytetOrder is set correctly.");
    return -1;
    }
  
  numPts = dimensions[0] * dimensions[1] * dimensions[2];
  
  // Skip xCoords
  this->IFile->seekg(sizeof(float)*dimensions[0], ios::cur);
  // Skip yCoords
  this->IFile->seekg(sizeof(float)*dimensions[1], ios::cur);
  // Skip zCoords
  this->IFile->seekg(sizeof(float)*dimensions[2], ios::cur);

  if (iblanked)
    {
    vtkWarningMacro("VTK does not handle blanking for rectilinear grids.");
    this->IFile->seekg(sizeof(int)*numPts, ios::cur);
    }
  
  // reading next line to check for EOF
  lineRead = this->ReadLine(line);
  return lineRead;
}

//----------------------------------------------------------------------------
int vtkEnSightGoldBinaryReader::SkipImageData(char line[256])
{
  char subLine[80];
  int lineRead;
  int iblanked = 0;
  int dimensions[3];
  float origin[3], delta[3];
  int numPts;
  
  if (sscanf(line, " %*s %*s %s", subLine) == 1)
    {
    if (strncmp(subLine, "iblanked", 8) == 0)
      {
      iblanked = 1;
      }
    }

  this->ReadIntArray(dimensions, 3);
  this->ReadFloatArray(origin, 3);
  this->ReadFloatArray(delta, 3);
  
  if (iblanked)
    {
    vtkWarningMacro("VTK does not handle blanking for image data.");
    numPts = dimensions[0] * dimensions[1] * dimensions[2];
    if (dimensions[0] < 0 || dimensions[0]*(int)sizeof(int) > this->FileSize ||
        dimensions[0] > this->FileSize ||
        dimensions[1] < 0 || dimensions[1]*(int)sizeof(int) > this->FileSize ||
        dimensions[1] > this->FileSize ||
        dimensions[2] < 0 || dimensions[2]*(int)sizeof(int) > this->FileSize ||
        dimensions[2] > this->FileSize ||
        numPts < 0 || numPts*(int)sizeof(int) > this->FileSize ||
        numPts > this->FileSize)
      {
      return -1;
      }
    this->IFile->seekg(sizeof(int)*numPts, ios::cur);
    }
  
  // reading next line to check for EOF
  lineRead = this->ReadLine(line);
  return lineRead;
}

//----------------------------------------------------------------------------
int vtkEnSightGoldBinaryReader::ReadMeasuredGeometryFile(const char* fileName,
                                                         int timeStep,
                                                         vtkMultiBlockDataSet *output)
{
  char line[80], subLine[80];
  vtkIdType i;
  int *pointIds;
  float *xCoords, *yCoords, *zCoords;
  vtkPoints *points = vtkPoints::New();
  vtkPolyData *pd = vtkPolyData::New();
  
  this->NumberOfNewOutputs++;

  // Initialize
  //
  if (!fileName)
    {
    vtkErrorMacro("A MeasuredFileName must be specified in the case file.");
    return 0;
    }
  vtkstd::string sfilename;
  if (this->FilePath)
    {
    sfilename = this->FilePath;
    if (sfilename.at(sfilename.length()-1) != '/')
      {
      sfilename += "/";
      }
    sfilename += fileName;
    vtkDebugMacro("full path to measured geometry file: " 
                  << sfilename.c_str());
    }
  else
    {
    sfilename = fileName;
    }
  
  if (this->OpenFile(sfilename.c_str()) == 0)
    {
    vtkErrorMacro("Unable to open file: " << sfilename.c_str());
    return 0;
    }
  
  this->ReadLine(line);
  sscanf(line, " %*s %s", subLine);
  if (strncmp(subLine, "Binary", 6) != 0)
    {
    vtkErrorMacro("This is not a binary data set. Try "
                  << "vtkEnSightGoldReader.");
    return 0;
    }

  if (this->UseFileSets)
    {
    for (i = 0; i < timeStep - 1; i++)
      {
      while (strncmp(line, "BEGIN TIME STEP", 15) != 0)
        {
        this->ReadLine(line);
        }
      // Skip the description line.
      this->ReadLine(line);
      
      this->ReadLine(line); // "particle coordinates"
      
      this->ReadInt(&this->NumberOfMeasuredPoints);
      
      // Skip pointIds
      //this->IFile->ignore(sizeof(int)*this->NumberOfMeasuredPoints);
      // Skip xCoords
      //this->IFile->ignore(sizeof(float)*this->NumberOfMeasuredPoints);
      // Skip yCoords
      //this->IFile->ignore(sizeof(float)*this->NumberOfMeasuredPoints);
      // Skip zCoords
      //this->IFile->ignore(sizeof(float)*this->NumberOfMeasuredPoints);
      this->IFile->seekg(
              (sizeof(float)*3 + sizeof(int))*this->NumberOfMeasuredPoints,
               ios::cur);      
      this->ReadLine(line); // END TIME STEP
      }
    while (strncmp(line, "BEGIN TIME STEP", 15) != 0)
      {
      this->ReadLine(line);
      }
    }
  
  // Skip the description line.
  this->ReadLine(line);

  this->ReadLine(line); // "particle coordinates"
  
  this->ReadInt(&this->NumberOfMeasuredPoints);
  
  pointIds = new int   [ this->NumberOfMeasuredPoints ];
  xCoords  = new float [ this->NumberOfMeasuredPoints ];
  yCoords  = new float [ this->NumberOfMeasuredPoints ];
  zCoords  = new float [ this->NumberOfMeasuredPoints ];
  points->Allocate( this->NumberOfMeasuredPoints );
  pd->Allocate( this->NumberOfMeasuredPoints );
  
  // Extract the array of point indices. Note EnSight Manual v8.2 (pp. 559,
  // http://www-vis.lbl.gov/NERSC/Software/ensight/docs82/UserManual.pdf)
  // is wrong in describing the format of binary measured geometry files.
  // As opposed to this description, the actual format employs a 'hybrid'
  // storage scheme. Specifically, point indices are stored in an array,
  // whereas 3D coordinates follow the array in a tuple-by-tuple manner.
  // The following code segment (20+ lines) serves as a fix to bug #9245.
  this->ReadIntArray( pointIds, this->NumberOfMeasuredPoints );
  
  // Read point coordinates tuple by tuple while each tuple contains three
  // components: (x-cord, y-cord, z-cord)
  int  floatSize = sizeof( float );
  for ( i = 0; i < this->NumberOfMeasuredPoints; i ++ )
    {
    this->IFile->read(  ( char * )( xCoords + i ),  floatSize  );
    this->IFile->read(  ( char * )( yCoords + i ),  floatSize  );
    this->IFile->read(  ( char * )( zCoords + i ),  floatSize  );
    }
   
  if ( this->ByteOrder == FILE_LITTLE_ENDIAN )
    {
    vtkByteSwap::Swap4LERange( xCoords, this->NumberOfMeasuredPoints );
    vtkByteSwap::Swap4LERange( yCoords, this->NumberOfMeasuredPoints );
    vtkByteSwap::Swap4LERange( zCoords, this->NumberOfMeasuredPoints );
    }
  else
    {
    vtkByteSwap::Swap4BERange( xCoords, this->NumberOfMeasuredPoints );
    vtkByteSwap::Swap4BERange( yCoords, this->NumberOfMeasuredPoints );
    vtkByteSwap::Swap4BERange( zCoords, this->NumberOfMeasuredPoints );
    }
  
  // NOTE: EnSight always employs a 1-based indexing scheme and therefore
  // 'if (this->ParticleCoordinatesByIndex)' was removed here. Otherwise
  // the measured geometry could not be proeperly interpreted.
  // This bug was noticed while fixing bug #7453.
  for (i = 0; i < this->NumberOfMeasuredPoints; i++)
    {
    points->InsertNextPoint(xCoords[i], yCoords[i], zCoords[i]);
    pd->InsertNextCell(VTK_VERTEX, 1, &i);
    }

  pd->SetPoints(points);
  this->AddToBlock(output, this->NumberOfGeometryParts, pd);
  
  points->Delete();
  pd->Delete();
  delete [] pointIds;
  delete [] xCoords;
  delete [] yCoords;
  delete [] zCoords;
  
  if (this->IFile)
    {
    this->IFile->close();
    delete this->IFile;
    this->IFile = NULL;
    }
  return 1;
}

//----------------------------------------------------------------------------
int vtkEnSightGoldBinaryReader::ReadScalarsPerNode(
  const char* fileName, const char* description, int timeStep,
  vtkMultiBlockDataSet *compositeOutput, int measured,
  int numberOfComponents, int component)
{
  char line[80];
  int partId, realId, numPts, i, lineRead;
  vtkFloatArray *scalars;
  float* scalarsRead;
  vtkDataSet *output;
  
  // Initialize
  //
  if (!fileName)
    {
    vtkErrorMacro("NULL ScalarPerNode variable file name");
    return 0;
    }
  vtkstd::string sfilename;
  if (this->FilePath)
    {
    sfilename = this->FilePath;
    if (sfilename.at(sfilename.length()-1) != '/')
      {
      sfilename += "/";
      }
    sfilename += fileName;
    vtkDebugMacro("full path to scalar per node file: " << sfilename.c_str());
    }
  else
    {
    sfilename = fileName;
    }
  
  if (this->OpenFile(sfilename.c_str()) == 0)
    {
    vtkErrorMacro("Unable to open file: " << sfilename.c_str());
    return 0;
    }

  if (this->UseFileSets)
    {
    for (i = 0; i < timeStep - 1; i++)
      {
      this->ReadLine(line);
      while (strncmp(line, "BEGIN TIME STEP", 15) != 0)
        {
        this->ReadLine(line);
        }
      this->ReadLine(line); // skip the description line
      
      if (measured)
        {
        output = static_cast<vtkDataSet*>(
          this->GetDataSetFromBlock(compositeOutput, this->NumberOfGeometryParts));
        numPts = output->GetNumberOfPoints();
        if (numPts)
          {
          this->ReadLine(line);
          // Skip sclalars
          this->IFile->seekg(sizeof(float)*numPts, ios::cur);
          }
        }
      
      while (this->ReadLine(line) &&
             strncmp(line, "part", 4) == 0)
        {
        this->ReadPartId(&partId);
        partId--; // EnSight starts #ing with 1.
        realId = this->InsertNewPartId(partId);
        output = static_cast<vtkDataSet*>(
          this->GetDataSetFromBlock(compositeOutput, realId));
        numPts = output->GetNumberOfPoints();
        if (numPts)
          {
          this->ReadLine(line); // "coordinates" or "block"
          // Skip sclalars
          this->IFile->seekg(sizeof(float)*numPts, ios::cur);
          }
        }
      }
    this->ReadLine(line);
    while (strncmp(line, "BEGIN TIME STEP", 15) != 0)
      {
      this->ReadLine(line);
      }
    }
  
  this->ReadLine(line); // skip the description line
  
  if (measured)
    {
    output = static_cast<vtkDataSet*>(
      this->GetDataSetFromBlock(compositeOutput, this->NumberOfGeometryParts));
    numPts = output->GetNumberOfPoints();
    if (numPts)
      {
      // 'this->ReadLine(line)' was removed here, otherwise there would be a
      // problem with timestep retrieval of the measured scalars.
      // This bug was noticed while fixing bug #7453.
      scalars = vtkFloatArray::New();
      scalars->SetNumberOfComponents(numberOfComponents);
      scalars->SetNumberOfTuples(numPts);
      scalarsRead = new float [numPts];
      this->ReadFloatArray(scalarsRead, numPts);
      // Why are we setting only one component here?
      // Only one component is set because scalars are single-component arrays.
      // For complex scalars, there is a file for the real part and another
      // file for the imaginary part, but we are storing them as a 2-component
      // array.
      for (i = 0; i < numPts; i++)
        {
        scalars->SetComponent(i, component, scalarsRead[i]);
        }
      scalars->SetName(description);
      output->GetPointData()->AddArray(scalars);
      if (!output->GetPointData()->GetScalars())
        {
        output->GetPointData()->SetScalars(scalars);
        }
      scalars->Delete();
      delete [] scalarsRead;
      }
    if (this->IFile)
      {
      this->IFile->close();
      delete this->IFile;
      this->IFile = NULL;
      }
    return 1;
    }
  
  lineRead = this->ReadLine(line);
  while (lineRead && strncmp(line, "part", 4) == 0)
    {
    this->ReadPartId(&partId);
    partId--; // EnSight starts #ing with 1.
    realId = this->InsertNewPartId(partId);
    output = this->GetDataSetFromBlock(compositeOutput, realId);
    numPts = output->GetNumberOfPoints();
    // If the part has no points, then only the part number is listed in
    // the variable file.
    if (numPts)
      {
      this->ReadLine(line); // "coordinates" or "block"
      if (component == 0)
        {
        scalars = vtkFloatArray::New();
        scalars->SetNumberOfComponents(numberOfComponents);
        scalars->SetNumberOfTuples(numPts);
        }
      else
        {
        scalars = (vtkFloatArray*)(output->GetPointData()->
                                   GetArray(description));
        }

      scalarsRead = new float[numPts];
      this->ReadFloatArray(scalarsRead, numPts);

      for (i = 0; i < numPts; i++)
        {
        scalars->SetComponent(i, component, scalarsRead[i]);
        }
      if (component == 0)
        {
        scalars->SetName(description);
        output->GetPointData()->AddArray(scalars);
        if (!output->GetPointData()->GetScalars())
          {
          output->GetPointData()->SetScalars(scalars);
          }
        scalars->Delete();
        }
      else
        {
        output->GetPointData()->AddArray(scalars);
        }
      delete [] scalarsRead;
      }

    this->IFile->peek();
    if (this->IFile->eof())
      {
      lineRead = 0;
      continue;
      }
    lineRead = this->ReadLine(line);
    }
  
  if (this->IFile)
    {
    this->IFile->close();
    delete this->IFile;
    this->IFile = NULL;
    }
  return 1;
}

//----------------------------------------------------------------------------
int vtkEnSightGoldBinaryReader::ReadVectorsPerNode(
  const char* fileName, const char* description, int timeStep,
  vtkMultiBlockDataSet *compositeOutput, int measured)
{
  char line[80]; 
  int partId, realId, numPts, i, lineRead;
  vtkFloatArray *vectors;
  float tuple[3];
  float *comp1, *comp2, *comp3;
  float *vectorsRead;
  vtkDataSet *output;
  
  // Initialize
  //
  if (!fileName)
    {
    vtkErrorMacro("NULL VectorPerNode variable file name");
    return 0;
    }
  vtkstd::string sfilename;
  if (this->FilePath)
    {
    sfilename = this->FilePath;
    if (sfilename.at(sfilename.length()-1) != '/')
      {
      sfilename += "/";
      }
    sfilename += fileName;
    vtkDebugMacro("full path to vector per node file: " << sfilename.c_str());
    }
  else
    {
    sfilename = fileName;
    }
  
  if (this->OpenFile(sfilename.c_str()) == 0)
    {
    vtkErrorMacro("Unable to open file: " << sfilename.c_str());
    return 0;
    }

  if (this->UseFileSets)
    {
    for (i = 0; i < timeStep - 1; i++)
      {
      this->ReadLine(line);
      while (strncmp(line, "BEGIN TIME STEP", 15) != 0)
        {
        this->ReadLine(line);
        }
      this->ReadLine(line); // skip the description line
      
      if (measured)
        {
        output = static_cast<vtkDataSet*>(
          this->GetDataSetFromBlock(compositeOutput, this->NumberOfGeometryParts));
        numPts = output->GetNumberOfPoints();
        if (numPts)
          {
          this->ReadLine(line);
          // Skip vectors.
          this->IFile->seekg(sizeof(float)*3*numPts, ios::cur);
          }
        }
      
      while (this->ReadLine(line) &&
             strncmp(line, "part", 4) == 0)
        {
        this->ReadPartId(&partId);
        partId--; // EnSight starts #ing with 1.
        realId = this->InsertNewPartId(partId);
        output = static_cast<vtkDataSet*>(
          this->GetDataSetFromBlock(compositeOutput, realId));
        numPts = output->GetNumberOfPoints();
        if (numPts)
          {
          this->ReadLine(line); // "coordinates" or "block"
          // Skip comp1, comp2 and comp3
          this->IFile->seekg(sizeof(float)*3*numPts, ios::cur);
          }
        }
      }
    this->ReadLine(line);
    while (strncmp(line, "BEGIN TIME STEP", 15) != 0)
      {
      this->ReadLine(line);
      }
    }
  
  this->ReadLine(line); // skip the description line

  if (measured)
    {
    output = static_cast<vtkDataSet*>(
      this->GetDataSetFromBlock(compositeOutput, this->NumberOfGeometryParts));
    numPts = output->GetNumberOfPoints();
    if (numPts)
      {
      // NOTE: NO ReadLine() here since there is only one description
      // line (already read above), immediately followed by the actual data.
      
      vectors = vtkFloatArray::New();
      vectors->SetNumberOfComponents(3);
      vectors->SetNumberOfTuples(numPts);
      vectorsRead = vectors->GetPointer(0);
      this->ReadFloatArray(vectorsRead, numPts*3);
      vectors->SetName(description);
      output->GetPointData()->AddArray(vectors);
      if (!output->GetPointData()->GetVectors())
        {
        output->GetPointData()->SetVectors(vectors);
        }
      vectors->Delete();
      }
    if (this->IFile)
      {
      this->IFile->close();
      delete this->IFile;
      this->IFile = NULL;
      }
    return 1;
    }
  
  lineRead = this->ReadLine(line);
  while (lineRead && strncmp(line, "part", 4) == 0)
    {
    vectors = vtkFloatArray::New();
    this->ReadPartId(&partId);
    partId--; // EnSight starts #ing with 1.
    realId = this->InsertNewPartId(partId);
    output = this->GetDataSetFromBlock(compositeOutput, realId);
    numPts = output->GetNumberOfPoints();
    if (numPts)
      {
      this->ReadLine(line); // "coordinates" or "block"
      vectors->SetNumberOfComponents(3);
      vectors->SetNumberOfTuples(numPts);
      comp1 = new float[numPts];
      comp2 = new float[numPts];
      comp3 = new float[numPts];
      this->ReadFloatArray(comp1, numPts);
      this->ReadFloatArray(comp2, numPts);
      this->ReadFloatArray(comp3, numPts);
      for (i = 0; i < numPts; i++)
        {
        tuple[0] = comp1[i];
        tuple[1] = comp2[i];
        tuple[2] = comp3[i];
        vectors->SetTuple(i, tuple);
        }
      vectors->SetName(description);
      output->GetPointData()->AddArray(vectors);
      if (!output->GetPointData()->GetVectors())
        {
        output->GetPointData()->SetVectors(vectors);
        }
      vectors->Delete();
      delete [] comp1;
      delete [] comp2;
      delete [] comp3;
      }

    this->IFile->peek();
    if (this->IFile->eof())
      {
      lineRead = 0;
      continue;
      }
    lineRead = this->ReadLine(line);
    }

  if (this->IFile)
    {
    this->IFile->close();
    delete this->IFile;
    this->IFile = NULL;
    }

  return 1;
}

//----------------------------------------------------------------------------
int vtkEnSightGoldBinaryReader::ReadTensorsPerNode(
  const char* fileName, const char* description, int timeStep,
  vtkMultiBlockDataSet *compositeOutput)
{
  char line[80];
  int partId, realId, numPts, i, lineRead;
  vtkFloatArray *tensors;
  float *comp1, *comp2, *comp3, *comp4, *comp5, *comp6;
  float tuple[6];
  vtkDataSet *output;
  
  // Initialize
  //
  if (!fileName)
    {
    vtkErrorMacro("NULL TensorPerNode variable file name");
    return 0;
    }
  vtkstd::string sfilename;
  if (this->FilePath)
    {
    sfilename = this->FilePath;
    if (sfilename.at(sfilename.length()-1) != '/')
      {
      sfilename += "/";
      }
    sfilename += fileName;
    vtkDebugMacro("full path to tensor per node file: " << sfilename.c_str());
    }
  else
    {
    sfilename = fileName;
    }
  
  if (this->OpenFile(sfilename.c_str()) == 0)
    {
    vtkErrorMacro("Unable to open file: " << sfilename.c_str());
    return 0;
    }

  if (this->UseFileSets)
    {
    for (i = 0; i < timeStep - 1; i++)
      {
      this->ReadLine(line);
      while (strncmp(line, "BEGIN TIME STEP", 15) != 0)
        {
        this->ReadLine(line);
        }
      this->ReadLine(line); // skip the description line
      
      while (this->ReadLine(line) &&
             strncmp(line, "part", 4) == 0)
        {
        this->ReadPartId(&partId);
        partId--; // EnSight starts #ing with 1.
        realId = this->InsertNewPartId(partId);
        output = this->GetDataSetFromBlock(compositeOutput, realId);
        numPts = output->GetNumberOfPoints();
        if (numPts)
          {
          this->ReadLine(line); // "coordinates" or "block"
          // Skip over comp1, comp2, ... comp6
          this->IFile->seekg(sizeof(float)*6*numPts, ios::cur);
          }
        }
      }
    this->ReadLine(line);
    while (strncmp(line, "BEGIN TIME STEP", 15) != 0)
      {
      this->ReadLine(line);
      }
    }
  
  this->ReadLine(line); // skip the description line
  lineRead = this->ReadLine(line);

  while (lineRead && strncmp(line, "part", 4) == 0)
    {
    this->ReadPartId(&partId);
    partId--; // EnSight starts #ing with 1.
    realId = this->InsertNewPartId(partId);
    output = this->GetDataSetFromBlock(compositeOutput, realId);
    numPts = output->GetNumberOfPoints();
    if (numPts)
      {
      tensors = vtkFloatArray::New();
      this->ReadLine(line); // "coordinates" or "block"
      tensors->SetNumberOfComponents(6);
      tensors->SetNumberOfTuples(numPts);
      comp1 = new float[numPts];
      comp2 = new float[numPts];
      comp3 = new float[numPts];
      comp4 = new float[numPts];
      comp5 = new float[numPts];
      comp6 = new float[numPts];
      this->ReadFloatArray(comp1, numPts);
      this->ReadFloatArray(comp2, numPts);
      this->ReadFloatArray(comp3, numPts);
      this->ReadFloatArray(comp4, numPts);
      this->ReadFloatArray(comp5, numPts);
      this->ReadFloatArray(comp6, numPts);
      for (i = 0; i < numPts; i++)
        {
        tuple[0] = comp1[i];
        tuple[1] = comp2[i];
        tuple[2] = comp3[i];
        tuple[3] = comp4[i];
        tuple[4] = comp5[i];
        tuple[5] = comp6[i];
        tensors->InsertTuple(i, tuple);
        }
      tensors->SetName(description);
      output->GetPointData()->AddArray(tensors);
      tensors->Delete();
      delete [] comp1;
      delete [] comp2;
      delete [] comp3;
      delete [] comp4;
      delete [] comp5;
      delete [] comp6;
      }

    this->IFile->peek();
    if (this->IFile->eof())
      {
      lineRead = 0;
      continue;
      }
    lineRead = this->ReadLine(line);
    }

  if (this->IFile)
    {
    this->IFile->close();
    delete this->IFile;
    this->IFile = NULL;
    }

  return 1;
}

//----------------------------------------------------------------------------
int vtkEnSightGoldBinaryReader::ReadScalarsPerElement(
  const char* fileName, const char* description, int timeStep,
  vtkMultiBlockDataSet *compositeOutput, int numberOfComponents,
  int component)
{
  char line[80];
  int partId, realId, numCells, numCellsPerElement, i, idx;
  vtkFloatArray *scalars;
  float *scalarsRead;
  int lineRead, elementType;
  vtkDataSet *output;
  
  // Initialize
  //
  if (!fileName)
    {
    vtkErrorMacro("NULL ScalarPerElement variable file name");
    return 0;
    }
  vtkstd::string sfilename;
  if (this->FilePath)
    {
    sfilename = this->FilePath;
    if (sfilename.at(sfilename.length()-1) != '/')
      {
      sfilename += "/";
      }
    sfilename += fileName;
    vtkDebugMacro("full path to scalar per element file: " 
                  << sfilename.c_str());
    }
  else
    {
    sfilename = fileName;
    }
  
  if (this->OpenFile(sfilename.c_str()) == 0)
    {
    vtkErrorMacro("Unable to open file: " << sfilename.c_str());
    return 0;
    }
  
  if (this->UseFileSets)
    {
    for (i = 0; i < timeStep - 1; i++)
      {
      this->ReadLine(line);
      while (strncmp(line, "BEGIN TIME STEP", 15) != 0)
        {
        this->ReadLine(line);
        }
      this->ReadLine(line); // skip the description line
      lineRead = this->ReadLine(line); // "part"
      
      while (lineRead && strncmp(line, "part", 4) == 0)
        {
        this->ReadPartId(&partId);
        partId--; // EnSight starts #ing with 1.
        realId = this->InsertNewPartId(partId);
        output = this->GetDataSetFromBlock(compositeOutput, realId);
        numCells = output->GetNumberOfCells();
        if (numCells)
          {
          this->ReadLine(line); // element type or "block"
        
          // need to find out from CellIds how many cells we have of this
          // element type (and what their ids are) -- IF THIS IS NOT A BLOCK
          // SECTION
          if (strncmp(line, "block", 5) == 0)
            {
            // Skip over float scalars.
            this->IFile->seekg(sizeof(float)*numCells, ios::cur);
            lineRead = this->ReadLine(line);
            }
          else 
            {
            while (lineRead && strncmp(line, "part", 4) != 0 &&
                   strncmp(line, "END TIME STEP", 13) != 0)
              {
              elementType = this->GetElementType(line);
              if (elementType == -1)
                {
                vtkErrorMacro("Unknown element type \"" << line << "\"");
                if (this->IFile)
                  {
                  this->IFile->close();
                  delete this->IFile;
                  this->IFile = NULL;
                  }
                return 0;
                }
              idx = this->UnstructuredPartIds->IsId(realId);
              numCellsPerElement = this->GetCellIds(idx, elementType)->
                GetNumberOfIds();
              this->IFile->seekg(sizeof(float)*numCellsPerElement, ios::cur);
              lineRead = this->ReadLine(line);
              }
            } // end while
          } // end if (numCells)
        else
          {
          lineRead = this->ReadLine(line);
          }
        } // end while
      } // end for
    this->ReadLine(line);
    while (strncmp(line, "BEGIN TIME STEP", 15) != 0)
      {
      this->ReadLine(line);
      }
    }
  
  this->ReadLine(line); // skip the description line
  lineRead = this->ReadLine(line); // "part"
  
  while (lineRead && strncmp(line, "part", 4) == 0)
    {
    this->ReadPartId(&partId);
    partId--; // EnSight starts #ing with 1.
    realId = this->InsertNewPartId(partId);
    output = this->GetDataSetFromBlock(compositeOutput, realId);
    numCells = output->GetNumberOfCells();
    if (numCells)
      {
      this->ReadLine(line); // element type or "block"
      if (component == 0)
        {
        scalars = vtkFloatArray::New();
        scalars->SetNumberOfComponents(numberOfComponents);
        scalars->SetNumberOfTuples(numCells);
        }
      else
        {
        scalars = (vtkFloatArray*)(output->GetCellData()->GetArray(description));
        }

      // need to find out from CellIds how many cells we have of this element
      // type (and what their ids are) -- IF THIS IS NOT A BLOCK SECTION
      if (strncmp(line, "block", 5) == 0)
        {
        scalarsRead = new float[numCells];
        this->ReadFloatArray(scalarsRead, numCells);
        for (i = 0; i < numCells; i++)
          {
          scalars->SetComponent(i, component, scalarsRead[i]);
          }
        if (this->IFile->eof())
          {
          lineRead = 0;
          }
        else
          {
          lineRead = this->ReadLine(line);
          }
        delete [] scalarsRead;
        }
      else
        {
        while (lineRead && strncmp(line, "part", 4) != 0 &&
               strncmp(line, "END TIME STEP", 13) != 0)
          {
          elementType = this->GetElementType(line);
          if (elementType == -1)
            {
            vtkErrorMacro("Unknown element type \"" << line << "\"");
            if (this->IFile)
              {
              this->IFile->close();
              delete this->IFile;
              this->IFile = NULL;
              }
            if (component == 0)
              {
              scalars->Delete();
              }
            return 0;
            }
          idx = this->UnstructuredPartIds->IsId(realId);
          numCellsPerElement =
            this->GetCellIds(idx, elementType)->GetNumberOfIds();
          scalarsRead = new float[numCellsPerElement];
          this->ReadFloatArray(scalarsRead, numCellsPerElement);
          for (i = 0; i < numCellsPerElement; i++)
            {
            scalars->SetComponent(this->GetCellIds(idx, elementType)->GetId(i),
                                  component, scalarsRead[i]);
            }
          this->IFile->peek();
          if (this->IFile->eof())
            {
            lineRead = 0;
            }
          else
            {
            lineRead = this->ReadLine(line);
            }
          delete [] scalarsRead;
          } // end while
        } // end else
      if (component == 0)
        {
        scalars->SetName(description);
        output->GetCellData()->AddArray(scalars);
        if (!output->GetCellData()->GetScalars())
          {
          output->GetCellData()->SetScalars(scalars);
          }
        scalars->Delete();
        }
      else
        {
        output->GetCellData()->AddArray(scalars);
        }
      }
    else
      {
      this->IFile->peek();
      if (this->IFile->eof())
        {
        lineRead = 0;
        }
      else
        {
        lineRead = this->ReadLine(line);
        }
      }
    }
  
  if (this->IFile)
    {
    this->IFile->close();
    delete this->IFile;
    this->IFile = NULL;
    }
  return 1;
}

//----------------------------------------------------------------------------
int vtkEnSightGoldBinaryReader::ReadVectorsPerElement(
  const char* fileName, const char* description, int timeStep,
  vtkMultiBlockDataSet *compositeOutput)
{
  char line[80];
  int partId, realId, numCells, numCellsPerElement, i, idx;
  vtkFloatArray *vectors;
  float *comp1, *comp2, *comp3;
  int lineRead, elementType;
  float tuple[3];
  vtkDataSet *output;
  
  // Initialize
  //
  if (!fileName)
    {
    vtkErrorMacro("NULL VectorPerElement variable file name");
    return 0;
    }
  vtkstd::string sfilename;
  if (this->FilePath)
    {
    sfilename = this->FilePath;
    if (sfilename.at(sfilename.length()-1) != '/')
      {
      sfilename += "/";
      }
    sfilename += fileName;
    vtkDebugMacro("full path to vector per element file: " 
                  << sfilename.c_str());
    }
  else
    {
    sfilename = fileName;
    }
  
  if (this->OpenFile(sfilename.c_str()) == 0)
    {
    vtkErrorMacro("Unable to open file: " << sfilename.c_str());
    return 0;
    }

  if (this->UseFileSets)
    {
    for (i = 0; i < timeStep - 1; i++)
      {
      this->ReadLine(line);
      while (strncmp(line, "BEGIN TIME STEP", 15) != 0)
        {
        this->ReadLine(line);
        }
      this->ReadLine(line); // skip the description line
      lineRead = this->ReadLine(line); // "part"
      
      while (lineRead && strncmp(line, "part", 4) == 0)
        {
        this->ReadPartId(&partId);
        partId--; // EnSight starts #ing with 1.
        realId = this->InsertNewPartId(partId);
        output = this->GetDataSetFromBlock(compositeOutput, realId);
        numCells = output->GetNumberOfCells();
        if (numCells)
          {
          this->ReadLine(line); // element type or "block"

          // need to find out from CellIds how many cells we have of this
          // element type (and what their ids are) -- IF THIS IS NOT A BLOCK
          // SECTION
          if (strncmp(line, "block", 5) == 0)
            {
            // Skip over comp1, comp2 and comp3
            this->IFile->seekg(sizeof(float)*3*numCells, ios::cur);
            lineRead = this->ReadLine(line);
            }
          else 
            {
            while (lineRead && strncmp(line, "part", 4) != 0 &&
                   strncmp(line, "END TIME STEP", 13) != 0)
              {
              elementType = this->GetElementType(line);
              if (elementType == -1)
                {
                vtkErrorMacro("Unknown element type \"" << line << "\"");
                delete this->IS;
                this->IS = NULL;
                return 0;
                }
              idx = this->UnstructuredPartIds->IsId(realId);
              numCellsPerElement = this->GetCellIds(idx, elementType)->
                GetNumberOfIds();
              // Skip over comp1, comp2 and comp3
              this->IFile->seekg(sizeof(float)*3*numCellsPerElement, ios::cur);
              lineRead = this->ReadLine(line);
              } // end while
            } // end else
          }
        else
          {
          lineRead = this->ReadLine(line);
          }
        }
      }
    this->ReadLine(line);
    while (strncmp(line, "BEGIN TIME STEP", 15) != 0)
      {
      this->ReadLine(line);
      }
    }
  
  this->ReadLine(line); // skip the description line
  lineRead = this->ReadLine(line); // "part"
  
  while (lineRead && strncmp(line, "part", 4) == 0)
    {
    this->ReadPartId(&partId);
    partId--; // EnSight starts #ing with 1.
    realId = this->InsertNewPartId(partId);
    output = this->GetDataSetFromBlock(compositeOutput, realId);
    numCells = output->GetNumberOfCells();
    if (numCells)
      {
      vectors = vtkFloatArray::New();
      this->ReadLine(line); // element type or "block"
      vectors->SetNumberOfComponents(3);
      vectors->SetNumberOfTuples(numCells);
      // need to find out from CellIds how many cells we have of this element
      // type (and what their ids are) -- IF THIS IS NOT A BLOCK SECTION
      if (strncmp(line, "block", 5) == 0)
        {
        comp1 = new float[numCells];
        comp2 = new float[numCells];
        comp3 = new float[numCells];
        this->ReadFloatArray(comp1, numCells);
        this->ReadFloatArray(comp2, numCells);
        this->ReadFloatArray(comp3, numCells);
        for (i = 0; i < numCells; i++)
          {
          tuple[0] = comp1[i];
          tuple[1] = comp2[i];
          tuple[2] = comp3[i];
          vectors->SetTuple(i, tuple);
          }
        this->IFile->peek();
        if (this->IFile->eof())
          {
          lineRead = 0;
          }
        else
          {
          lineRead = this->ReadLine(line);
          }
        delete [] comp1;
        delete [] comp2;
        delete [] comp3;
        }
      else 
        {
        while (lineRead && strncmp(line, "part", 4) != 0 &&
               strncmp(line, "END TIME STEP", 13) != 0)
          {
          elementType = this->GetElementType(line);
          if (elementType == -1)
            {
            vtkErrorMacro("Unknown element type \"" << line << "\"");
            delete this->IS;
            this->IS = NULL;
            vectors->Delete();
            return 0;
            }
          idx = this->UnstructuredPartIds->IsId(realId);
          numCellsPerElement =
            this->GetCellIds(idx, elementType)->GetNumberOfIds();
          comp1 = new float[numCellsPerElement];
          comp2 = new float[numCellsPerElement];
          comp3 = new float[numCellsPerElement];        
          this->ReadFloatArray(comp1, numCellsPerElement);
          this->ReadFloatArray(comp2, numCellsPerElement);
          this->ReadFloatArray(comp3, numCellsPerElement);
          for (i = 0; i < numCellsPerElement; i++)
            {
            tuple[0] = comp1[i];
            tuple[1] = comp2[i];
            tuple[2] = comp3[i];
            vectors->SetTuple(this->GetCellIds(idx, elementType)->GetId(i),
                              tuple);
            }
          this->IFile->peek();
          if (this->IFile->eof())
            {
            lineRead = 0;
            }
          else
            {
            lineRead = this->ReadLine(line);
            }
          delete [] comp1;
          delete [] comp2;
          delete [] comp3;
          } // end while
        } // end else
      vectors->SetName(description);
      output->GetCellData()->AddArray(vectors);
      if (!output->GetCellData()->GetVectors())
        {
        output->GetCellData()->SetVectors(vectors);
        }
      vectors->Delete();
      }
    else
      {
      this->IFile->peek();
      if (this->IFile->eof())
        {
        lineRead = 0;
        }
      else
        {
        lineRead = this->ReadLine(line);
        }
      }
    }
  
  if (this->IFile)
    {
    this->IFile->close();
    delete this->IFile;
    this->IFile = NULL;
    }
  return 1;
}

//----------------------------------------------------------------------------
int vtkEnSightGoldBinaryReader::ReadTensorsPerElement(
  const char* fileName, const char* description, int timeStep,
  vtkMultiBlockDataSet *compositeOutput)
{
  char line[80];
  int partId, realId, numCells, numCellsPerElement, i, idx;
  vtkFloatArray *tensors;
  int lineRead, elementType;
  float *comp1, *comp2, *comp3, *comp4, *comp5, *comp6;
  float tuple[6];
  vtkDataSet *output;
  
  // Initialize
  //
  if (!fileName)
    {
    vtkErrorMacro("NULL TensorPerElement variable file name");
    return 0;
    }
  vtkstd::string sfilename;
  if (this->FilePath)
    {
    sfilename = this->FilePath;
    if (sfilename.at(sfilename.length()-1) != '/')
      {
      sfilename += "/";
      }
    sfilename += fileName;
    vtkDebugMacro("full path to  tensor per element file: " 
                  << sfilename.c_str());
    }
  else
    {
    sfilename = fileName;
    }
  
  if (this->OpenFile(sfilename.c_str()) == 0)
    {
    vtkErrorMacro("Unable to open file: " << sfilename.c_str());
    return 0;
    }

  if (this->UseFileSets)
    {
    for (i = 0; i < timeStep - 1; i++)
      {
      this->ReadLine(line);
      while (strncmp(line, "BEGIN TIME STEP", 15) != 0)
        {
        this->ReadLine(line);
        }
      this->ReadLine(line); // skip the description line
      lineRead = this->ReadLine(line); // "part"
      
      while (lineRead && strncmp(line, "part", 4) == 0)
        {
        this->ReadPartId(&partId);
        partId--; // EnSight starts #ing with 1.
        realId = this->InsertNewPartId(partId);
        output = this->GetDataSetFromBlock(compositeOutput, realId);
        numCells = output->GetNumberOfCells();
        if (numCells)
          {
          this->ReadLine(line); // element type or "block"

          // need to find out from CellIds how many cells we have of this
          // element type (and what their ids are) -- IF THIS IS NOT A BLOCK
          // SECTION
          if (strncmp(line, "block", 5) == 0)
            {
            // Skip comp1 - comp6
            this->IFile->seekg(sizeof(float)*6*numCells, ios::cur);
            lineRead = this->ReadLine(line);
            }
          else 
            {
            while (lineRead && strncmp(line, "part", 4) != 0 &&
                   strncmp(line, "END TIME STEP", 13) != 0)
              {
              elementType = this->GetElementType(line);
              if (elementType == -1)
                {
                vtkErrorMacro("Unknown element type \"" << line << "\"");
                delete this->IS;
                this->IS = NULL;
                return 0;
                }
              idx = this->UnstructuredPartIds->IsId(realId);
              numCellsPerElement = this->GetCellIds(idx, elementType)->
                GetNumberOfIds();
              // Skip over comp1->comp6
              this->IFile->seekg(sizeof(float)*6*numCellsPerElement, ios::cur);
              lineRead = this->ReadLine(line);
              } // end while
            } // end else
          } // end if (numCells)
        else
          {
          lineRead = this->ReadLine(line);
          }
        }
      }
    this->ReadLine(line);
    while (strncmp(line, "BEGIN TIME STEP", 15) != 0)
      {
      this->ReadLine(line);
      }
    }
  
  this->ReadLine(line); // skip the description line
  lineRead = this->ReadLine(line); // "part"
  
  while (lineRead && strncmp(line, "part", 4) == 0)
    {
    this->ReadPartId(&partId);
    partId--; // EnSight starts #ing with 1.
    realId = this->InsertNewPartId(partId);
    output = this->GetDataSetFromBlock(compositeOutput, realId);
    numCells = output->GetNumberOfCells();
    if (numCells)
      {
      tensors = vtkFloatArray::New();
      this->ReadLine(line); // element type or "block"
      tensors->SetNumberOfComponents(6);
      tensors->SetNumberOfTuples(numCells);

      // need to find out from CellIds how many cells we have of this element
      // type (and what their ids are) -- IF THIS IS NOT A BLOCK SECTION
      if (strncmp(line, "block", 5) == 0)
        {
        comp1 = new float[numCells];
        comp2 = new float[numCells];
        comp3 = new float[numCells];
        comp4 = new float[numCells];
        comp5 = new float[numCells];
        comp6 = new float[numCells];
        this->ReadFloatArray(comp1, numCells);
        this->ReadFloatArray(comp2, numCells);
        this->ReadFloatArray(comp3, numCells);
        this->ReadFloatArray(comp4, numCells);
        this->ReadFloatArray(comp5, numCells);
        this->ReadFloatArray(comp6, numCells);
        for (i = 0; i < numCells; i++)
          {
          tuple[0] = comp1[i];
          tuple[1] = comp2[i];
          tuple[2] = comp3[i];
          tuple[3] = comp4[i];
          tuple[4] = comp5[i];
          tuple[5] = comp6[i];
          tensors->InsertTuple(i, tuple);
          }
        this->IFile->peek();
        if (this->IFile->eof())
          {
          lineRead = 0;
          }
        else
          {
          lineRead = this->ReadLine(line);
          }
        delete [] comp1;
        delete [] comp2;
        delete [] comp3;
        delete [] comp4;
        delete [] comp5;
        delete [] comp6;
        }
      else 
        {
        while (lineRead && strncmp(line, "part", 4) != 0 &&
               strncmp(line, "END TIME STEP", 13) != 0)
          {
          elementType = this->GetElementType(line);
          if (elementType == -1)
            {
            vtkErrorMacro("Unknown element type \"" << line << "\"");
            delete this->IS;
            this->IS = NULL;
            tensors->Delete();
            return 0;
            }
          idx = this->UnstructuredPartIds->IsId(realId);
          numCellsPerElement =
            this->GetCellIds(idx, elementType)->GetNumberOfIds();
          comp1 = new float[numCellsPerElement];
          comp2 = new float[numCellsPerElement];
          comp3 = new float[numCellsPerElement];
          comp4 = new float[numCellsPerElement];
          comp5 = new float[numCellsPerElement];
          comp6 = new float[numCellsPerElement];
          this->ReadFloatArray(comp1, numCellsPerElement);
          this->ReadFloatArray(comp2, numCellsPerElement);
          this->ReadFloatArray(comp3, numCellsPerElement);
          this->ReadFloatArray(comp4, numCellsPerElement);
          this->ReadFloatArray(comp5, numCellsPerElement);
          this->ReadFloatArray(comp6, numCellsPerElement);
          for (i = 0; i < numCellsPerElement; i++)
            {
            tuple[0] = comp1[i];
            tuple[1] = comp2[i];
            tuple[2] = comp3[i];
            tuple[3] = comp4[i];
            tuple[4] = comp5[i];
            tuple[5] = comp6[i];
            tensors->InsertTuple(this->GetCellIds(idx, elementType)->GetId(i),
                                 tuple);
            }
          this->IFile->peek();
          if (this->IFile->eof())
            {
            lineRead = 0;
            }
          else
            {
            lineRead = this->ReadLine(line);
            }
          delete [] comp1;
          delete [] comp2;
          delete [] comp3;
          delete [] comp4;
          delete [] comp5;
          delete [] comp6;
          } // end while
        } // end else
      tensors->SetName(description);
      output->GetCellData()->AddArray(tensors);
      tensors->Delete();
      }
    else
      {
      this->IFile->peek();
      if (this->IFile->eof())
        {
        lineRead = 0;
        }
      else
        {
        lineRead = this->ReadLine(line);
        }
      }
    }
  
  if (this->IFile)
    {
    this->IFile->close();
    delete this->IFile;
    this->IFile = NULL;
    }
  return 1;
}

//----------------------------------------------------------------------------
int vtkEnSightGoldBinaryReader::CreateUnstructuredGridOutput(
  int partId, char line[80], const char* name,
  vtkMultiBlockDataSet *compositeOutput)
{
  int lineRead = 1;
  int i, j;
  vtkIdType *nodeIds;
  int *nodeIdList;
  int numElements;
  int idx, cellId, cellType;
  float *xCoords, *yCoords, *zCoords;
  
  this->NumberOfNewOutputs++;
  
  if (this->GetDataSetFromBlock(compositeOutput, partId) == NULL ||
      !this->GetDataSetFromBlock(compositeOutput, partId)->IsA("vtkUnstructuredGrid"))
    {
    vtkDebugMacro("creating new unstructured output");
    vtkUnstructuredGrid* ugrid = vtkUnstructuredGrid::New();
    this->AddToBlock(compositeOutput, partId, ugrid);
    ugrid->Delete();
    
    this->UnstructuredPartIds->InsertNextId(partId);    
    }

  vtkUnstructuredGrid* output = vtkUnstructuredGrid::SafeDownCast(
    this->GetDataSetFromBlock(compositeOutput, partId));
  this->SetBlockName(compositeOutput, partId, name);
  
  // Clear all cell ids from the last execution, if any.
  idx = this->UnstructuredPartIds->IsId(partId);
  for (i = 0; i < vtkEnSightReader::NUMBER_OF_ELEMENT_TYPES; i++)
    {
    this->GetCellIds(idx, i)->Reset();
    }
  
  output->Allocate(1000);
  
  while(lineRead && strncmp(line, "part", 4) != 0)
    {
    if (strncmp(line, "coordinates", 11) == 0)
      {
      vtkDebugMacro("coordinates");
      int numPts;
      
      this->ReadInt(&numPts);
      if (numPts < 0 || numPts > this->FileSize || numPts * (int)sizeof(int) > this->FileSize)
        {
        vtkErrorMacro("Invalid number of unstructured points read; check that ByteOrder is set correctly.");
        return -1;
        }
      
      vtkPoints *points = vtkPoints::New();
      vtkDebugMacro("num. points: " << numPts);
      
      points->Allocate(numPts);

      if (this->NodeIdsListed)
        {
        this->IFile->seekg(sizeof(int)*numPts, ios::cur);
        }
      
      xCoords = new float[numPts];
      yCoords = new float[numPts];
      zCoords = new float[numPts];
      this->ReadFloatArray(xCoords, numPts);
      this->ReadFloatArray(yCoords, numPts);
      this->ReadFloatArray(zCoords, numPts);
      
      for (i = 0; i < numPts; i++)
        {
        points->InsertNextPoint(xCoords[i], yCoords[i], zCoords[i]);
        }
      
      output->SetPoints(points);
      points->Delete();
      delete [] xCoords;
      delete [] yCoords;
      delete [] zCoords;
      }
    else if (strncmp(line, "point", 5) == 0)
      {
      vtkDebugMacro("point");
      
      this->ReadInt(&numElements);
      if (numElements < 0 || numElements*(int)sizeof(int) > this->FileSize ||
          numElements > this->FileSize)
        {
        vtkErrorMacro("Invalid number of point cells; check that ByteOrder is set correctly.");
        return -1;
        }
      
      nodeIds = new vtkIdType[1];
      
      if (this->ElementIdsListed)
        {
        this->IFile->seekg(sizeof(int)*numElements, ios::cur);
        }
      
      nodeIdList = new int[numElements];
      this->ReadIntArray(nodeIdList, numElements);

      for (i = 0; i < numElements; i++)
        {
        nodeIds[0] = nodeIdList[i] - 1;
        cellId = output->InsertNextCell(VTK_VERTEX, 1, nodeIds);
        this->GetCellIds(idx, vtkEnSightReader::POINT)->InsertNextId(cellId);
        }
      
      delete [] nodeIds;
      delete [] nodeIdList;
      }
    else if (strncmp(line, "g_point", 7) == 0)
      {
      // skipping ghost cells
      vtkDebugMacro("g_point");
      
      this->ReadInt(&numElements);
      if (numElements < 0 || numElements*(int)sizeof(int) > this->FileSize ||
          numElements > this->FileSize)
        {
        vtkErrorMacro("Invalid number of g_point cells; check that ByteOrder is set correctly.");
        return -1;
        }
      if (this->ElementIdsListed)
        { // skip element ids.
        this->IFile->seekg(sizeof(int)*numElements, ios::cur);
        }
      
      // Skip nodeIdList.
      this->IFile->seekg(sizeof(int)*numElements, ios::cur);
      }
    else if (strncmp(line, "bar2", 4) == 0)
      {
      vtkDebugMacro("bar2");
      
      this->ReadInt(&numElements);
      if (numElements < 0 || numElements*(int)sizeof(int) > this->FileSize ||
          numElements > this->FileSize)
        {
        vtkErrorMacro("Invalid number of bar2 cells; check that ByteOrder is set correctly.");
        return -1;
        }
      nodeIds = new vtkIdType[2];
      if (this->ElementIdsListed)
        {
        this->IFile->seekg(sizeof(int)*numElements, ios::cur);
        }

      nodeIdList = new int[numElements * 2];
      this->ReadIntArray(nodeIdList, numElements * 2);
      
      for (i = 0; i < numElements; i++)
        {
        for (j = 0; j < 2; j++)
          {
          nodeIds[j] = nodeIdList[2*i+j] - 1;
          }
        cellId = output->InsertNextCell(VTK_LINE, 2, nodeIds);
        this->GetCellIds(idx, vtkEnSightReader::BAR2)->InsertNextId(cellId);
        }
      
      delete [] nodeIds;
      delete [] nodeIdList;
      }
    else if (strncmp(line, "g_bar2", 6) == 0)
      {
      // skipping ghost cells
      vtkDebugMacro("g_bar2");
      
      this->ReadInt(&numElements);
      if (numElements < 0 || numElements*(int)sizeof(int) > this->FileSize ||
          numElements > this->FileSize)
        {
        vtkErrorMacro("Invalid number of g_bar2 cells; check that ByteOrder is set correctly.");
        return -1;
        }
      if (this->ElementIdsListed)
        {
        this->IFile->seekg(sizeof(int)*numElements, ios::cur);
        }

      // Skip nodeIdList.
      this->IFile->seekg(sizeof(int)*2*numElements, ios::cur);
      }
    else if (strncmp(line, "bar3", 4) == 0)
      {
      vtkDebugMacro("bar3");

      this->ReadInt(&numElements);
      if (numElements < 0 || numElements*(int)sizeof(int) > this->FileSize ||
          numElements > this->FileSize)
        {
        vtkErrorMacro("Invalid number of bar3 cells; check that ByteOrder is set correctly.");
        return -1;
        }
      nodeIds = new vtkIdType[3];

      if (this->ElementIdsListed)
        {
        this->IFile->seekg(sizeof(int)*numElements, ios::cur);
        }
      
      nodeIdList = new int[numElements*3];
      this->ReadIntArray(nodeIdList, numElements*3);
      
      for (i = 0; i < numElements; i++)
        {
        nodeIds[0] = nodeIdList[3*i]-1;
        nodeIds[1] = nodeIdList[3*i+2]-1;
        nodeIds[2] = nodeIdList[3*i+1]-1;

        cellId = output->InsertNextCell(VTK_QUADRATIC_EDGE, 3, nodeIds);
        this->GetCellIds(idx, vtkEnSightReader::BAR3)->InsertNextId(cellId);
        }
      
      delete [] nodeIds;
      delete [] nodeIdList;
      }
    else if (strncmp(line, "g_bar3", 6) == 0)
      {
      // skipping ghost cells
      vtkDebugMacro("g_bar3");

      this->ReadInt(&numElements);
      if (numElements < 0 || numElements*(int)sizeof(int) > this->FileSize ||
          numElements > this->FileSize)
        {
        vtkErrorMacro("Invalid number of g_bar3 cells; check that ByteOrder is set correctly.");
        return -1;
        }

      if (this->ElementIdsListed)
        {
        this->IFile->seekg(sizeof(int)*numElements, ios::cur);
        }
      
      // Skip nodeIdList.
      this->IFile->seekg(sizeof(int)*2*numElements, ios::cur);
      }
    else if (strncmp(line, "nsided", 6) == 0)
      {
      vtkDebugMacro("nsided");
      int *numNodesPerElement;
      int numNodes = 0;
      int nodeCount = 0;
      
      cellType = vtkEnSightReader::NSIDED;
      this->ReadInt(&numElements);
      if (numElements < 0 || numElements*(int)sizeof(int) > this->FileSize ||
          numElements > this->FileSize)
        {
        vtkErrorMacro("Invalid number of nsided cells; check that ByteOrder is set correctly.");
        return -1;
        }
      
      if (this->ElementIdsListed)
        {
        this->IFile->seekg(sizeof(int)*numElements, ios::cur);
        }
      
      numNodesPerElement = new int[numElements];
      this->ReadIntArray(numNodesPerElement, numElements);
      for (i = 0; i < numElements; i++)
        {
        numNodes += numNodesPerElement[i];
        }
      nodeIdList = new int[numNodes];
      this->ReadIntArray(nodeIdList, numNodes);
      
      for (i = 0; i < numElements; i++)
        {
        nodeIds = new vtkIdType[numNodesPerElement[i]];
        for (j = 0; j < numNodesPerElement[i]; j++)
          {
          nodeIds[j] = nodeIdList[nodeCount] - 1;
          nodeCount++;
          }
        cellId = output->InsertNextCell(VTK_POLYGON, 
                                        numNodesPerElement[i], 
                                        nodeIds);
        this->GetCellIds(idx, cellType)->InsertNextId(cellId);
        
        delete [] nodeIds;
        }
      
      delete [] nodeIdList;
      delete [] numNodesPerElement;
      }
    else if (strncmp(line, "g_nsided", 8) == 0)
      {
      // skipping ghost cells
      vtkDebugMacro("g_nsided");
      int *numNodesPerElement;
      int numNodes = 0;
      
      //cellType = vtkEnSightReader::NSIDED;
      this->ReadInt(&numElements);
      if (numElements < 0 || numElements*(int)sizeof(int) > this->FileSize ||
          numElements > this->FileSize)
        {
        vtkErrorMacro("Invalid number of g_nsided cells; check that ByteOrder is set correctly.");
        return -1;
        }
      
      if (this->ElementIdsListed)
        {
        this->IFile->seekg(sizeof(int)*numElements, ios::cur);
        }
      
      numNodesPerElement = new int[numElements];
      this->ReadIntArray(numNodesPerElement, numElements);
      for (i = 0; i < numElements; i++)
        {
        numNodes += numNodesPerElement[i];
        }
      // Skip nodeIdList.
      this->IFile->seekg(sizeof(int)*numNodes, ios::cur);
      delete [] numNodesPerElement;
      }
    else if (strncmp(line, "tria3", 5) == 0 ||
             strncmp(line, "tria6", 5) == 0)
      {
      if (strncmp(line, "tria6", 5) == 0)
        {
        vtkDebugMacro("tria6");
        cellType = vtkEnSightReader::TRIA6;
        }
      else
        {
        vtkDebugMacro("tria3");
        cellType = vtkEnSightReader::TRIA3;
        }
      
      this->ReadInt(&numElements);
      if (numElements < 0 || numElements*(int)sizeof(int) > this->FileSize ||
          numElements > this->FileSize)
        {
        vtkErrorMacro("Invalid number of triangle cells; check that ByteOrder is set correctly.");
        return -1;
        }

      if (this->ElementIdsListed)
        {
        this->IFile->seekg(sizeof(int)*numElements, ios::cur);
        }

      if (cellType == vtkEnSightReader::TRIA6)
        {
        nodeIds = new vtkIdType[6];
        nodeIdList = new int[numElements*6];
        this->ReadIntArray(nodeIdList, numElements*6);
        }
      else
        {
        nodeIds = new vtkIdType[3];
        nodeIdList = new int[numElements*3];
        this->ReadIntArray(nodeIdList, numElements*3);
        }
      
      for (i = 0; i < numElements; i++)
        {
        if (cellType == vtkEnSightReader::TRIA6)
          {
          for (j = 0; j < 6; j++)
            {
            nodeIds[j] = nodeIdList[6*i+j] - 1;
            }
          cellId = output->InsertNextCell(VTK_QUADRATIC_TRIANGLE, 6, nodeIds);
          }
        else
          {
          for (j = 0; j < 3; j++)
            {
            nodeIds[j] = nodeIdList[3*i+j] - 1;
            }
          cellId = output->InsertNextCell(VTK_TRIANGLE, 3, nodeIds);
          }
        this->GetCellIds(idx, cellType)->InsertNextId(cellId);
        }
      
      delete [] nodeIds;
      delete [] nodeIdList;
      }
    else if (strncmp(line, "g_tria3", 7) == 0 ||
             strncmp(line, "g_tria6", 7) == 0)
      {
      // skipping ghost cells
      if (strncmp(line, "g_tria6", 7) == 0)
        {
        vtkDebugMacro("g_tria6");
        cellType = vtkEnSightReader::TRIA6;
        }
      else
        {
        vtkDebugMacro("g_tria3");
        cellType = vtkEnSightReader::TRIA3;
        }
      
      this->ReadInt(&numElements);
      if (numElements < 0 || numElements*(int)sizeof(int) > this->FileSize ||
          numElements > this->FileSize)
        {
        vtkErrorMacro("Invalid number of triangle cells; check that ByteOrder is set correctly.");
        return -1;
        }
      if (this->ElementIdsListed)
        {
        this->IFile->seekg(sizeof(int)*numElements, ios::cur);
        }

      if (cellType == vtkEnSightReader::TRIA6)
        {
        // Skip nodeIdList.
        this->IFile->seekg(sizeof(int)*6*numElements, ios::cur);
        }
      else
        {
        // Skip nodeIdList.
        this->IFile->seekg(sizeof(int)*3*numElements, ios::cur);
        }
      }
    else if (strncmp(line, "quad4", 5) == 0 ||
             strncmp(line, "quad8", 5) == 0)
      {
      if (strncmp(line, "quad8", 5) == 0)
        {
        vtkDebugMacro("quad8");
        cellType = vtkEnSightReader::QUAD8;
        }
      else
        {
        vtkDebugMacro("quad4");
        cellType = vtkEnSightReader::QUAD4;
        }
      
      this->ReadInt(&numElements);
      if (numElements < 0 || numElements*(int)sizeof(int) > this->FileSize ||
          numElements > this->FileSize)
        {
        vtkErrorMacro("Invalid number of quad cells; check that ByteOrder is set correctly.");
        return -1;
        }

      if (this->ElementIdsListed)
        {
        this->IFile->seekg(sizeof(int)*numElements, ios::cur);
        }

      if (cellType == vtkEnSightReader::QUAD8)
        {
        nodeIds = new vtkIdType[8];
        nodeIdList = new int[numElements*8];
        this->ReadIntArray(nodeIdList, numElements*8);
        }
      else
        {
        nodeIds = new vtkIdType[4];
        nodeIdList = new int[numElements*4];
        this->ReadIntArray(nodeIdList, numElements*4);
        }
      
      for (i = 0; i < numElements; i++)
        {
        if (cellType == vtkEnSightReader::QUAD8)
          {
          for (j = 0; j < 8; j++)
            {
            nodeIds[j] = nodeIdList[8*i+j] - 1;
            }
          cellId = output->InsertNextCell(VTK_QUADRATIC_QUAD, 8, nodeIds);
          }
        else
          {
          for (j = 0; j < 4; j++)
            {
            nodeIds[j] = nodeIdList[4*i+j] - 1;
            }
          cellId = output->InsertNextCell(VTK_QUAD, 4, nodeIds);
          }
        this->GetCellIds(idx, cellType)->InsertNextId(cellId);
        }
      
      delete [] nodeIds;
      delete [] nodeIdList;
      }
    else if (strncmp(line, "g_quad4", 7) == 0 ||
             strncmp(line, "g_quad8", 7) == 0)
      {
      // skipping ghost cells
      if (strncmp(line, "g_quad8", 7) == 0)
        {
        vtkDebugMacro("g_quad8");
        cellType = vtkEnSightReader::QUAD8;
        }
      else
        {
        vtkDebugMacro("g_quad4");
        cellType = vtkEnSightReader::QUAD4;
        }
      
      this->ReadInt(&numElements);
      if (numElements < 0 || numElements*(int)sizeof(int) > this->FileSize ||
          numElements > this->FileSize)
        {
        vtkErrorMacro("Invalid number of quad cells; check that ByteOrder is set correctly.");
        return -1;
        }
      if (this->ElementIdsListed)
        {
        this->IFile->seekg(sizeof(int)*numElements, ios::cur);
        }

      if (cellType == vtkEnSightReader::QUAD8)
        {
        // Skip nodeIdList.
        this->IFile->seekg(sizeof(int)*8*numElements, ios::cur);
        }
      else
        {
        // Skip nodeIdList.
        this->IFile->seekg(sizeof(int)*4*numElements, ios::cur);
        }
      }

    else if (strncmp(line, "nfaced", 6) == 0)
      {
      vtkDebugMacro("nfaced");
      int *numFacesPerElement;
      int *numNodesPerFace;
      int *numNodesPerElement;
      int *nodeMarker;
      int numPts = 0;
      int numFaces = 0;
      int numNodes = 0;
      int faceCount = 0;
      int nodeCount = 0;
      int elementNodeCount = 0;
      
      cellType = vtkEnSightReader::NFACED;
      this->ReadInt(&numElements);
      if (numElements < 0 || numElements*(int)sizeof(int) > this->FileSize ||
          numElements > this->FileSize)
        {
        vtkErrorMacro("Invalid number of nfaced cells; check that ByteOrder is set correctly.");
        return -1;
        }
      
      if (this->ElementIdsListed)
        {
        this->IFile->seekg(sizeof(int)*numElements, ios::cur);
        }
      
      numFacesPerElement = new int[numElements];
      this->ReadIntArray(numFacesPerElement, numElements);
      for (i = 0; i < numElements; i++)
        {
        numFaces += numFacesPerElement[i];
        }
      numNodesPerFace = new int[numFaces];
      this->ReadIntArray(numNodesPerFace, numFaces);

      numNodesPerElement = new int[numElements];
      for (i = 0; i < numElements; i++)
        {
        numNodesPerElement[i] = 0;
        for (j = 0; j < numFacesPerElement[i]; j++)
          {
          numNodesPerElement[i] += numNodesPerFace[faceCount + j];
          }
        faceCount += numFacesPerElement[i];
        }

      delete [] numFacesPerElement;
      delete [] numNodesPerFace;

      for (i = 0; i < numElements; i++)
        {
        numNodes += numNodesPerElement[i];
        }

      numPts = output->GetNumberOfPoints();
      nodeMarker = new int[numPts];
      for (i = 0; i < numPts; i++)
        {
        nodeMarker[i] = -1;
        }

      nodeIdList = new int[numNodes];
      this->ReadIntArray(nodeIdList, numNodes);
      
      for (i = 0; i < numElements; i++)
        {
        elementNodeCount = 0;
        nodeIds = new vtkIdType[numNodesPerElement[i]];
        for (j = 0; j < numNodesPerElement[i]; j++)
          {
          if (nodeMarker[nodeIdList[nodeCount] - 1] < i)
            {
            nodeIds[elementNodeCount] = nodeIdList[nodeCount] - 1;
            nodeMarker[nodeIdList[nodeCount] - 1] = i;
            elementNodeCount += 1;
            }
          nodeCount++;
          }
        cellId = output->InsertNextCell(VTK_CONVEX_POINT_SET, 
                                        elementNodeCount, 
                                        nodeIds);
        this->GetCellIds(idx, cellType)->InsertNextId(cellId);
        
        delete [] nodeIds;
        }
      
      delete [] nodeMarker;
      delete [] nodeIdList;
      delete [] numNodesPerElement;
      }
    else if (strncmp(line, "tetra4", 6) == 0 ||
             strncmp(line, "tetra10", 7) == 0)
      {
      if (strncmp(line, "tetra10", 7) == 0)
        {
        vtkDebugMacro("tetra10");
        cellType = vtkEnSightReader::TETRA10;
        }
      else
        {
        vtkDebugMacro("tetra4");
        cellType = vtkEnSightReader::TETRA4;
        }
      
      this->ReadInt(&numElements);
      if (numElements < 0 || numElements*(int)sizeof(int) > this->FileSize ||
          numElements > this->FileSize)
        {
        vtkErrorMacro("Invalid number of tetrahedral cells; check that ByteOrder is set correctly.");
        return -1;
        }

      if (this->ElementIdsListed)
        {
        this->IFile->seekg(sizeof(int)*numElements, ios::cur);
        }

      if (cellType == vtkEnSightReader::TETRA10)
        {
        nodeIds = new vtkIdType[10];
        nodeIdList = new int[numElements*10];
        this->ReadIntArray(nodeIdList, numElements*10);
        }
      else
        {
        nodeIds = new vtkIdType[4];
        nodeIdList = new int[numElements*4];
        this->ReadIntArray(nodeIdList, numElements*4);
        }
      
      for (i = 0; i < numElements; i++)
        {
        if (cellType == vtkEnSightReader::TETRA10)
          {
          for (j = 0; j < 10; j++)
            {
            nodeIds[j] = nodeIdList[10*i+j] - 1;
            }
          cellId = output->InsertNextCell(VTK_QUADRATIC_TETRA, 10, nodeIds);
          }
        else
          {
          for (j = 0; j < 4; j++)
            {
            nodeIds[j] = nodeIdList[4*i+j] - 1;
            }
          cellId = output->InsertNextCell(VTK_TETRA, 4, nodeIds);
          }
        this->GetCellIds(idx, cellType)->InsertNextId(cellId);
        }
      
      delete [] nodeIds;
      delete [] nodeIdList;
      }
    else if (strncmp(line, "g_tetra4", 8) == 0 ||
             strncmp(line, "g_tetra10", 9) == 0)
      {
      // skipping ghost cells
      if (strncmp(line, "g_tetra10", 9) == 0)
        {
        vtkDebugMacro("g_tetra10");
        cellType = vtkEnSightReader::TETRA10;
        }
      else
        {
        vtkDebugMacro("g_tetra4");
        cellType = vtkEnSightReader::TETRA4;
        }
      
      this->ReadInt(&numElements);
      if (numElements < 0 || numElements*(int)sizeof(int) > this->FileSize ||
          numElements > this->FileSize)
        {
        vtkErrorMacro("Invalid number of tetrahedral cells; check that ByteOrder is set correctly.");
        return -1;
        }
      if (this->ElementIdsListed)
        {
        this->IFile->seekg(sizeof(int)*numElements, ios::cur);
        }

      if (cellType == vtkEnSightReader::TETRA10)
        {
        // Skip nodeIdList.
        this->IFile->seekg(sizeof(int)*10*numElements, ios::cur);
        }
      else
        {
        // Skip nodeIdList.
        this->IFile->seekg(sizeof(int)*4*numElements, ios::cur);
        }
      }
    else if (strncmp(line, "pyramid5", 8) == 0 ||
             strncmp(line, "pyramid13", 9) == 0)
      {
      if (strncmp(line, "pyramid13", 9) == 0)
        {
        vtkDebugMacro("pyramid13");
        cellType = vtkEnSightReader::PYRAMID13;
        }
      else
        {
        vtkDebugMacro("pyramid5");
        cellType = vtkEnSightReader::PYRAMID5;
        }
      
      this->ReadInt(&numElements);
      if (numElements < 0 || numElements*(int)sizeof(int) > this->FileSize ||
          numElements > this->FileSize)
        {
        vtkErrorMacro("Invalid number of pyramid cells; check that ByteOrder is set correctly.");
        return -1;
        }

      if (this->ElementIdsListed)
        {
        this->IFile->seekg(sizeof(int)*numElements, ios::cur);
        }

      if (cellType == vtkEnSightReader::PYRAMID13)
        {
        nodeIds = new vtkIdType[13];
        nodeIdList = new int[numElements*13];
        this->ReadIntArray(nodeIdList, numElements*13);
        }
      else
        {
        nodeIds = new vtkIdType[5];
        nodeIdList = new int[numElements*5];
        this->ReadIntArray(nodeIdList, numElements*5);
        }
      
      for (i = 0; i < numElements; i++)
        {
        if (cellType == vtkEnSightReader::PYRAMID13)
          {
          for (j = 0; j < 13; j++)
            {
            nodeIds[j] = nodeIdList[13*i+j] - 1;
            }
          cellId = output->InsertNextCell(VTK_QUADRATIC_PYRAMID, 13, nodeIds);
          }
        else
          {
          for (j = 0; j < 5; j++)
            {
            nodeIds[j] = nodeIdList[5*i+j] - 1;
            }
          cellId = output->InsertNextCell(VTK_PYRAMID, 5, nodeIds);
          }
        this->GetCellIds(idx, cellType)->InsertNextId(cellId);
        }
      
      delete [] nodeIds;
      delete [] nodeIdList;
      }
    else if (strncmp(line, "g_pyramid5", 10) == 0 ||
             strncmp(line, "g_pyramid13", 11) == 0)
      {
      // skipping ghost cells
      if (strncmp(line, "g_pyramid13", 11) == 0)
        {
        vtkDebugMacro("g_pyramid13");
        cellType = vtkEnSightReader::PYRAMID13;
        }
      else
        {
        vtkDebugMacro("g_pyramid5");
        cellType = vtkEnSightReader::PYRAMID5;
        }
      
      this->ReadInt(&numElements);
      if (numElements < 0 || numElements*(int)sizeof(int) > this->FileSize ||
          numElements > this->FileSize)
        {
        vtkErrorMacro("Invalid number of pyramid cells; check that ByteOrder is set correctly.");
        return -1;
        }
      if (this->ElementIdsListed)
        {
        this->IFile->seekg(sizeof(int)*numElements, ios::cur);
        }

      if (cellType == vtkEnSightReader::PYRAMID13)
        {
        // Skip nodeIdList.
        this->IFile->seekg(sizeof(int)*13*numElements, ios::cur);
        }
      else
        {
        // Skip nodeIdList.
        this->IFile->seekg(sizeof(int)*5*numElements, ios::cur);
        }
      }
    else if (strncmp(line, "hexa8", 5) == 0 ||
             strncmp(line, "hexa20", 6) == 0)
      {
      if (strncmp(line, "hexa20", 6) == 0)
        {
        vtkDebugMacro("hexa20");
        cellType = vtkEnSightReader::HEXA20;
        }
      else
        {
        vtkDebugMacro("hexa8");
        cellType = vtkEnSightReader::HEXA8;
        }
      
      this->ReadInt(&numElements);
      if (numElements < 0 || numElements*(int)sizeof(int) > this->FileSize ||
          numElements > this->FileSize)
        {
        vtkErrorMacro("Invalid number of hexahedral cells; check that ByteOrder is set correctly.");
        return -1;
        }

      if (this->ElementIdsListed)
        {
        this->IFile->seekg(sizeof(int)*numElements, ios::cur);
        }

      if (cellType == vtkEnSightReader::HEXA20)
        {
        nodeIds = new vtkIdType[20];
        nodeIdList = new int[numElements*20];
        this->ReadIntArray(nodeIdList, numElements*20);
        }
      else
        {
        nodeIds = new vtkIdType[8];
        nodeIdList = new int[numElements*8];
        this->ReadIntArray(nodeIdList, numElements*8);
        }
      
      for (i = 0; i < numElements; i++)
        {
        if (cellType == vtkEnSightReader::HEXA20)
          {
          for (j = 0; j < 20; j++)
            {
            nodeIds[j] = nodeIdList[20*i+j] - 1;
            }
          cellId = output->InsertNextCell(VTK_QUADRATIC_HEXAHEDRON, 20, nodeIds);
          }
        else
          {
          for (j = 0; j < 8; j++)
            {
            nodeIds[j] = nodeIdList[8*i+j] - 1;
            }
          cellId = output->InsertNextCell(VTK_HEXAHEDRON, 8, nodeIds);
          }
        this->GetCellIds(idx, cellType)->InsertNextId(cellId);
        }
      
      delete [] nodeIds;
      delete [] nodeIdList;
      }
    else if (strncmp(line, "g_hexa8", 7) == 0 ||
             strncmp(line, "g_hexa20", 8) == 0)
      {
      // skipping ghost cells
      if (strncmp(line, "g_hexa20", 8) == 0)
        {
        vtkDebugMacro("g_hexa20");
        cellType = vtkEnSightReader::HEXA20;
        }
      else
        {
        vtkDebugMacro("g_hexa8");
        cellType = vtkEnSightReader::HEXA8;
        }
      
      this->ReadInt(&numElements);
      if (numElements < 0 || numElements*(int)sizeof(int) > this->FileSize ||
          numElements > this->FileSize)
        {
        vtkErrorMacro("Invalid number of hexahedral cells; check that ByteOrder is set correctly.");
        return -1;
        }
      if (this->ElementIdsListed)
        {
        this->IFile->seekg(sizeof(int)*numElements, ios::cur);
        }

      if (cellType == vtkEnSightReader::HEXA20)
        {
        // Skip nodeIdList.
        this->IFile->seekg(sizeof(int)*20*numElements, ios::cur);
        }
      else
        {
        // Skip nodeIdList.
        this->IFile->seekg(sizeof(int)*8*numElements, ios::cur);
        }
      }
    else if (strncmp(line, "penta6", 6) == 0 ||
             strncmp(line, "penta15", 7) == 0)
      {
      if (strncmp(line, "penta15", 7) == 0)
        {
        vtkDebugMacro("penta15");
        cellType = vtkEnSightReader::PENTA15;
        }
      else
        {
        vtkDebugMacro("penta6");
        cellType = vtkEnSightReader::PENTA6;
        }
      
      this->ReadInt(&numElements);
      if (numElements < 0 || numElements*(int)sizeof(int) > this->FileSize ||
          numElements > this->FileSize)
        {
        vtkErrorMacro("Invalid number of pentagonal cells; check that ByteOrder is set correctly.");
        return -1;
        }

      if (this->ElementIdsListed)
        {
        this->IFile->seekg(sizeof(int)*numElements, ios::cur);
        }

      if (cellType == vtkEnSightReader::PENTA15)
        {
        nodeIds = new vtkIdType[15];
        nodeIdList = new int[numElements*15];
        this->ReadIntArray(nodeIdList, numElements*15);
        }
      else
        {
        nodeIds = new vtkIdType[6];
        nodeIdList = new int[numElements*6];
        this->ReadIntArray(nodeIdList, numElements*6);
        }
      
      for (i = 0; i < numElements; i++)
        {
        if (cellType == vtkEnSightReader::PENTA15)
          {
          for (j = 0; j < 15; j++)
            {
            nodeIds[j] = nodeIdList[15*i+j] - 1;
            }
          cellId = output->InsertNextCell(VTK_QUADRATIC_WEDGE, 15, nodeIds);
          }
        else
          {
          for (j = 0; j < 6; j++)
            {
            nodeIds[j] = nodeIdList[6*i+j] - 1;
            }
          cellId = output->InsertNextCell(VTK_WEDGE, 6, nodeIds);
          }
        this->GetCellIds(idx, cellType)->InsertNextId(cellId);
        }
      
      delete [] nodeIds;
      delete [] nodeIdList;
      }
    else if (strncmp(line, "g_penta6", 8) == 0 ||
             strncmp(line, "g_penta15", 9) == 0)
      {
      // skipping ghost cells
      if (strncmp(line, "g_penta15", 9) == 0)
        {
        vtkDebugMacro("g_penta15");
        cellType = vtkEnSightReader::PENTA15;
        }
      else
        {
        vtkDebugMacro("g_penta6");
        cellType = vtkEnSightReader::PENTA6;
        }
      
      this->ReadInt(&numElements);
      if (numElements < 0 || numElements*(int)sizeof(int) > this->FileSize ||
          numElements > this->FileSize)
        {
        vtkErrorMacro("Invalid number of pentagonal cells; check that ByteOrder is set correctly.");
        return -1;
        }
      if (this->ElementIdsListed)
        {
        this->IFile->seekg(sizeof(int)*numElements, ios::cur);
        }

      if (cellType == vtkEnSightReader::PENTA15)
        {
        // Skip nodeIdList.
        this->IFile->seekg(sizeof(int)*15*numElements, ios::cur);
        }
      else
        {
        // Skip nodeIdList.
        this->IFile->seekg(sizeof(int)*6*numElements, ios::cur);
        }
      }
    else if (strncmp(line, "END TIME STEP", 13) == 0)
      {
      return 1;
      }
    else if (this->IS->fail())
      {
      //May want consistency check here?
      //vtkWarningMacro("EOF on geometry file");
      return 1;
      }
    else
      {
      vtkErrorMacro("undefined geometry file line");
      return -1;
      }
    this->IFile->peek();
    if (this->IFile->eof())
      {
      lineRead = 0;
      continue;
      }
    lineRead = this->ReadLine(line);
    }
  return lineRead;
}

//----------------------------------------------------------------------------
int vtkEnSightGoldBinaryReader::CreateStructuredGridOutput(
  int partId, char line[80], const char* name,
  vtkMultiBlockDataSet *compositeOutput)
{
  char subLine[80];
  int lineRead;
  int iblanked = 0;
  int dimensions[3];
  int i;
  vtkPoints *points = vtkPoints::New();
  int numPts;
  float *xCoords, *yCoords, *zCoords;
  
  this->NumberOfNewOutputs++;
  
  vtkDataSet* ds = this->GetDataSetFromBlock(compositeOutput, partId);
  if (ds == NULL || ! ds->IsA("vtkStructuredGrid"))
    {
    vtkDebugMacro("creating new structured grid output");
    vtkStructuredGrid* sgrid = vtkStructuredGrid::New();
    this->AddToBlock(compositeOutput, partId, sgrid);
    sgrid->Delete();
    ds = sgrid;
    }
  

  vtkStructuredGrid* output = vtkStructuredGrid::SafeDownCast(ds);
  this->SetBlockName(compositeOutput, partId, name);

  if (sscanf(line, " %*s %s", subLine) == 1)
    {
    if (strncmp(subLine, "iblanked", 8) == 0)
      {
      iblanked = 1;
      }
    }

  this->ReadIntArray(dimensions, 3);
  numPts = dimensions[0] * dimensions[1] * dimensions[2];
  if (dimensions[0] < 0 || dimensions[0]*(int)sizeof(int) > this->FileSize ||
      dimensions[0] > this->FileSize ||
      dimensions[1] < 0 || dimensions[1]*(int)sizeof(int) > this->FileSize ||
      dimensions[1] > this->FileSize ||
      dimensions[2] < 0 || dimensions[2]*(int)sizeof(int) > this->FileSize ||
      dimensions[2] > this->FileSize ||
      numPts < 0 || numPts*(int)sizeof(int) > this->FileSize ||
      numPts > this->FileSize)
    {
    vtkErrorMacro("Invalid dimensions read; check that ByteOrder is set correctly.");
    points->Delete();
    return -1;
    }
  output->SetDimensions(dimensions);
  output->SetWholeExtent(
    0, dimensions[0]-1, 0, dimensions[1]-1, 0, dimensions[2]-1);
  points->Allocate(numPts);

  xCoords = new float[numPts];
  yCoords = new float[numPts];
  zCoords = new float[numPts]; 
  this->ReadFloatArray(xCoords, numPts);
  this->ReadFloatArray(yCoords, numPts);
  this->ReadFloatArray(zCoords, numPts);
 
  for (i = 0; i < numPts; i++)
    {
    points->InsertNextPoint(xCoords[i], yCoords[i], zCoords[i]);
    }
  output->SetPoints(points);
  if (iblanked)
    {
    int *iblanks = new int[numPts];
    this->ReadIntArray(iblanks, numPts);
    
    for (i = 0; i < numPts; i++)
      {
      if (!iblanks[i])
        {
        output->BlankPoint(i);
        }
      }
    delete [] iblanks;
    }
  
  points->Delete();
  delete [] xCoords;
  delete [] yCoords;
  delete [] zCoords;

  this->IFile->peek();
  if (this->IFile->eof())
    {
    lineRead = 0;
    }
  else
    {
    lineRead = this->ReadLine(line);
    }
  
  if (strncmp(line, "node_ids", 8) == 0)
    {
    int *nodeIds = new int[numPts];
    this->ReadIntArray(nodeIds, numPts);
    lineRead = this->ReadLine(line);
    delete [] nodeIds;
    }
  if (strncmp(line, "element_ids", 11) == 0)
    {
    int numElements = (dimensions[0] - 1) * (dimensions[1] - 1) *
      (dimensions[2] - 1);
    int *elementIds = new int[numElements];
    this->ReadIntArray(elementIds, numElements);
    lineRead = this->ReadLine(line);
    delete [] elementIds;
    }
  
  return lineRead;
}

//----------------------------------------------------------------------------
int vtkEnSightGoldBinaryReader::CreateRectilinearGridOutput(
  int partId, char line[80], const char* name,
  vtkMultiBlockDataSet *compositeOutput)
{
  char subLine[80];
  int lineRead;
  int iblanked = 0;
  int dimensions[3];
  int i;
  vtkFloatArray *xCoords = vtkFloatArray::New();
  vtkFloatArray *yCoords = vtkFloatArray::New();
  vtkFloatArray *zCoords = vtkFloatArray::New();
  float *tempCoords;
  int numPts;
  
  this->NumberOfNewOutputs++;
 
  vtkDataSet* ds = this->GetDataSetFromBlock(compositeOutput, partId);
  if (ds == NULL || !ds->IsA("vtkRectilinearGrid"))
    {
    vtkDebugMacro("creating new rectilinear grid output");
    vtkRectilinearGrid* rgrid = vtkRectilinearGrid::New();
    this->AddToBlock(compositeOutput, partId, rgrid);
    rgrid->Delete();
    ds = rgrid;
    }

  vtkRectilinearGrid* output = vtkRectilinearGrid::SafeDownCast(ds);

  this->SetBlockName(compositeOutput, partId, name);
  
  if (sscanf(line, " %*s %*s %s", subLine) == 1)
    {
    if (strncmp(subLine, "iblanked", 8) == 0)
      {
      iblanked = 1;
      }
    }

  this->ReadIntArray(dimensions, 3);
  if (dimensions[0] < 0 || dimensions[0]*(int)sizeof(int) > this->FileSize ||
      dimensions[0] > this->FileSize ||
      dimensions[1] < 0 || dimensions[1]*(int)sizeof(int) > this->FileSize ||
      dimensions[1] > this->FileSize ||
      dimensions[2] < 0 || dimensions[2]*(int)sizeof(int) > this->FileSize ||
      dimensions[2] > this->FileSize ||
      (dimensions[0]+dimensions[1]+dimensions[2]) < 0 ||
      (dimensions[0]+dimensions[1]+dimensions[2])*(int)sizeof(int) > this->FileSize ||
      (dimensions[0]+dimensions[1]+dimensions[2]) > this->FileSize)
    {
    vtkErrorMacro("Invalid dimensions read; check that BytetOrder is set correctly.");
    xCoords->Delete();
    yCoords->Delete();
    zCoords->Delete();
    return -1;
    }
  
  output->SetDimensions(dimensions);
  output->SetWholeExtent(
    0, dimensions[0]-1, 0, dimensions[1]-1, 0, dimensions[2]-1);
  xCoords->Allocate(dimensions[0]);
  yCoords->Allocate(dimensions[1]);
  zCoords->Allocate(dimensions[2]);
  
  tempCoords = new float[dimensions[0]];
  this->ReadFloatArray(tempCoords, dimensions[0]);
  for (i = 0; i < dimensions[0]; i++)
    {
    xCoords->InsertNextTuple(&tempCoords[i]);
    }
  delete [] tempCoords;
  tempCoords = new float[dimensions[1]];
  this->ReadFloatArray(tempCoords, dimensions[1]);
  for (i = 0; i < dimensions[1]; i++)
    {
    yCoords->InsertNextTuple(&tempCoords[i]);
    }
  delete [] tempCoords;
  tempCoords = new float[dimensions[2]];
  this->ReadFloatArray(tempCoords, dimensions[2]);
  for (i = 0; i < dimensions[2]; i++)
    {
    zCoords->InsertNextTuple(&tempCoords[i]);
    }
  delete [] tempCoords;
  if (iblanked)
    {
    vtkWarningMacro("VTK does not handle blanking for rectilinear grids.");
    numPts = dimensions[0] * dimensions[1] * dimensions[2];
    int *tempArray = new int[numPts];
    this->ReadIntArray(tempArray, numPts);
    delete [] tempArray;
    }
  
  output->SetXCoordinates(xCoords);  
  output->SetYCoordinates(yCoords);
  output->SetZCoordinates(zCoords);

  xCoords->Delete();
  yCoords->Delete();
  zCoords->Delete();
  
  // reading next line to check for EOF
  lineRead = this->ReadLine(line);
  return lineRead;
}

//----------------------------------------------------------------------------
int vtkEnSightGoldBinaryReader::CreateImageDataOutput(
  int partId, char line[80], const char* name,
  vtkMultiBlockDataSet *compositeOutput)
{
  char subLine[80];
  int lineRead;
  int iblanked = 0;
  int dimensions[3];
  float origin[3], delta[3];
  int numPts;
  
  this->NumberOfNewOutputs++;
 
  vtkDataSet* ds = this->GetDataSetFromBlock(compositeOutput, partId);
  if (ds == NULL || !ds->IsA("vtkImageData"))
    {
    vtkDebugMacro("creating new image data output");
    vtkImageData* idata = vtkImageData::New();
    this->AddToBlock(compositeOutput, partId, idata);
    idata->Delete();
    ds = idata;
    }

  vtkImageData* output = vtkImageData::SafeDownCast(ds);

  this->SetBlockName(compositeOutput, partId, name);
  
  if (sscanf(line, " %*s %*s %s", subLine) == 1)
    {
    if (strncmp(subLine, "iblanked", 8) == 0)
      {
      iblanked = 1;
      }
    }

  this->ReadIntArray(dimensions, 3);
  output->SetDimensions(dimensions);
  output->SetWholeExtent(
    0, dimensions[0]-1, 0, dimensions[1]-1, 0, dimensions[2]-1);
  this->ReadFloatArray(origin, 3);
  output->SetOrigin(origin[0], origin[1], origin[2]);
  this->ReadFloatArray(delta, 3);
  output->SetSpacing(delta[0], delta[1], delta[2]);
  
  if (iblanked)
    {
    vtkWarningMacro("VTK does not handle blanking for image data.");
    numPts = dimensions[0]*dimensions[1]*dimensions[2];
    if (dimensions[0] < 0 || dimensions[0]*(int)sizeof(int) > this->FileSize ||
        dimensions[0] > this->FileSize ||
        dimensions[1] < 0 || dimensions[1]*(int)sizeof(int) > this->FileSize ||
        dimensions[1] > this->FileSize ||
        dimensions[2] < 0 || dimensions[2]*(int)sizeof(int) > this->FileSize ||
        dimensions[2] > this->FileSize ||
        numPts < 0 || numPts*(int)sizeof(int) > this->FileSize ||
        numPts > this->FileSize)
      {
      return -1;
      }
    int *tempArray = new int[numPts];
    this->ReadIntArray(tempArray, numPts);
    delete [] tempArray;
    }
  
  // reading next line to check for EOF
  lineRead = this->ReadLine(line);
  return lineRead;
}

// Internal function to read in a line up to 80 characters.
// Returns zero if there was an error.
int vtkEnSightGoldBinaryReader::ReadLine(char result[80])
{
  if ( this->IFile->read(result, 80) == 0)
    {
    // The read fails when reading the last part/array when there are no points.
    // I took out the error macro as a tempory fix.
    // We need to determine what EnSight does when the part with zero point
    // is not the last, and change the read array method.
    //int fixme; // I do not a file to test with yet.
    vtkDebugMacro("Read failed");
    return 0;
    }
  // fix to the memory leakage problem detected by Valgrind
  result[79] = '\0';
   
  // if the first 4 bytes is the length, then this data is no doubt
  // a fortran data write!, copy the last 76 into the beginning
  int c;
  char len[4] = {0x50, 0x00, 0x00, 0x00};
  if (this->ByteOrder == FILE_BIG_ENDIAN)
    {
    vtkByteSwap::Swap4BE(len);
    }

  bool isFortran = false;
  for (c=0; c<4; c++) 
  {
    if (result[c]!=len[c]) 
      {
      isFortran = false;
      break;
      }
    else isFortran = true;
  }
  this->Fortran = isFortran;
  if (this->Fortran) 
  {
    strncpy(result, &result[4], 76);
    result[76] = 0;
    // better read an extra 8 bytes to prevent error next time
    char dummy[8];
    if (this->IFile->read(dummy, 8) == 0)
      {
      vtkDebugMacro("Read (fortran) failed");
      return 0;
      }
  }
  
  return 1;
}

// Internal function to read a single integer.
// Returns zero if there was an error.
// Sets byte order so that part id is reasonable.
int vtkEnSightGoldBinaryReader::ReadPartId(int *result)
{
  // first swap like normal.
  if (this->ReadInt(result) == 0)
    {
    vtkErrorMacro("Read failed");
    return 0;
    }
  
  // second: try an experimental byte swap.
  // Only experiment if byte order is not set.
  if (this->ByteOrder == FILE_UNKNOWN_ENDIAN)
    {
    int tmpLE = *result;
    int tmpBE = *result;
    vtkByteSwap::Swap4LE(&tmpLE);
    vtkByteSwap::Swap4BE(&tmpBE);

    if (tmpLE >= 0 && tmpLE < MAXIMUM_PART_ID)
      {
      this->ByteOrder = FILE_LITTLE_ENDIAN;
      *result = tmpLE;
      return 1;
      }
    if (tmpBE >= 0 && tmpBE < MAXIMUM_PART_ID)
      {
      this->ByteOrder = FILE_BIG_ENDIAN;
      *result = tmpBE;
      return 1;
      }
    vtkErrorMacro("Byte order could not be determined.");
    return 0;
    }
  
  return 1;
}

// Internal function to read a single integer.
// Returns zero if there was an error.
int vtkEnSightGoldBinaryReader::ReadInt(int *result)
{
  char dummy[4];
  if (this->Fortran) 
    {
    if (this->IFile->read(dummy, 4) == 0)
      {
      vtkErrorMacro("Read (fortran) failed.");
      return 0;
      }
    }

  if ( this->IFile->read((char*)result, sizeof(int)) == 0)
    {
    vtkErrorMacro("Read failed");
    return 0;
    }

  if (this->ByteOrder == FILE_LITTLE_ENDIAN)
    {
    vtkByteSwap::Swap4LE(result);
    }
  else if (this->ByteOrder == FILE_BIG_ENDIAN)
    {
    vtkByteSwap::Swap4BE(result);
    }

  if (this->Fortran) 
    {
    if (this->IFile->read(dummy, 4) == 0)
      {
      vtkErrorMacro("Read (fortran) failed.");
      return 0;
      }
    }

  return 1;
}

// Internal function to read an integer array.
// Returns zero if there was an error.
int vtkEnSightGoldBinaryReader::ReadIntArray(int *result,
                                             int numInts)
{
  if (numInts <= 0)
    {
    return 1;
    }

  char dummy[4];
  if (this->Fortran) 
    {
    if (this->IFile->read(dummy, 4) == 0)
      {
      vtkErrorMacro("Read (fortran) failed.");
      return 0;
      }
    }

  if (this->IFile->read((char*)result, sizeof(int)*numInts) == 0)
    {
    vtkErrorMacro("Read failed.");
    return 0;
    }

  if (this->ByteOrder == FILE_LITTLE_ENDIAN)
    {
    vtkByteSwap::Swap4LERange(result, numInts);
    }
  else
    {
    vtkByteSwap::Swap4BERange(result, numInts);
    }
  
  if (this->Fortran) 
    {
    if (this->IFile->read(dummy, 4) == 0)
      {
      vtkErrorMacro("Read (fortran) failed.");
      return 0;
      }
    }

  return 1;
}

// Internal function to read a float array.
// Returns zero if there was an error.
int vtkEnSightGoldBinaryReader::ReadFloatArray(float *result,
                                               int numFloats)
{
  if (numFloats <= 0)
    {
    return 1;
    }

  char dummy[4];
  if (this->Fortran) 
    {
    if (this->IFile->read(dummy, 4) == 0)
      {
      vtkErrorMacro("Read (fortran) failed.");
      return 0;
      }
    }

  if (this->IFile->read((char*)result, sizeof(float)*numFloats) == 0)
    {
    vtkErrorMacro("Read failed");
    return 0;
    }

  if (this->ByteOrder == FILE_LITTLE_ENDIAN)
    {
    vtkByteSwap::Swap4LERange(result, numFloats);
    }
  else
    {
    vtkByteSwap::Swap4BERange(result, numFloats);
    }
  
  if (this->Fortran) 
    {
    if (this->IFile->read(dummy, 4) == 0)
      {
      vtkErrorMacro("Read (fortran) failed.");
      return 0;
      }
    }
  return 1;
}

//----------------------------------------------------------------------------
void vtkEnSightGoldBinaryReader::PrintSelf(ostream& os, vtkIndent indent)
{
  this->Superclass::PrintSelf(os,indent);
}
