// SPDX-FileCopyrightText: Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
// SPDX-License-Identifier: BSD-3-Clause
#include "vtkGenericEnSightReader.h"

#include "vtkCallbackCommand.h"
#include "vtkCompositeDataPipeline.h"
#include "vtkDataArrayCollection.h"
#include "vtkDataArraySelection.h"
#include "vtkDataSetTriangleFilter.h"
#include "vtkEnSight6BinaryReader.h"
#include "vtkEnSight6Reader.h"
#include "vtkEnSightGoldBinaryReader.h"
#include "vtkEnSightGoldReader.h"
#include "vtkIdListCollection.h"
#include "vtkInformation.h"
#include "vtkInformationVector.h"
#include "vtkMultiBlockDataSet.h"
#include "vtkObjectFactory.h"
#include "vtksys/FStream.hxx"
#include <vtksys/SystemTools.hxx>

#include <algorithm> /* std::remove */
#include <cassert>
#include <cctype> /* isspace */
#include <map>
#include <string>

VTK_ABI_NAMESPACE_BEGIN
vtkStandardNewMacro(vtkGenericEnSightReader);

vtkCxxSetObjectMacro(vtkGenericEnSightReader, TimeSets, vtkDataArrayCollection);

class TranslationTableType
{
public:
  std::map<int, int> PartIdMap;
};

//------------------------------------------------------------------------------
vtkGenericEnSightReader::vtkGenericEnSightReader()
{
  this->Reader = nullptr;
  this->IS = nullptr;
  this->IFile = nullptr;

  this->CaseFileName = nullptr;
  this->GeometryFileName = nullptr;
  this->FilePath = nullptr;

  this->VariableTypes = nullptr;
  this->ComplexVariableTypes = nullptr;

  this->VariableDescriptions = nullptr;
  this->ComplexVariableDescriptions = nullptr;

  this->NumberOfVariables = 0;
  this->NumberOfComplexVariables = 0;

  this->NumberOfScalarsPerNode = 0;
  this->NumberOfVectorsPerNode = 0;
  this->NumberOfTensorsAsymPerNode = 0;
  this->NumberOfTensorsSymmPerNode = 0;
  this->NumberOfScalarsPerElement = 0;
  this->NumberOfVectorsPerElement = 0;
  this->NumberOfTensorsAsymPerElement = 0;
  this->NumberOfTensorsSymmPerElement = 0;
  this->NumberOfScalarsPerMeasuredNode = 0;
  this->NumberOfVectorsPerMeasuredNode = 0;
  this->NumberOfComplexScalarsPerNode = 0;
  this->NumberOfComplexVectorsPerNode = 0;
  this->NumberOfComplexScalarsPerElement = 0;
  this->NumberOfComplexVectorsPerElement = 0;

  this->TimeValue = 0;

  this->MinimumTimeValue = 0;
  this->MaximumTimeValue = 0;

  this->TimeValueInitialized = 0;

  this->TimeSets = nullptr;

  this->ReadAllVariables = 1;

  this->ByteOrder = FILE_UNKNOWN_ENDIAN;

  this->ParticleCoordinatesByIndex = 0;

  this->EnSightVersion = -1;

  this->PointDataArraySelection = vtkDataArraySelection::New();
  this->CellDataArraySelection = vtkDataArraySelection::New();

  // Setup the selection callback to modify this object when an array
  // selection is changed.
  this->SelectionObserver = vtkCallbackCommand::New();
  this->SelectionObserver->SetCallback(&vtkGenericEnSightReader::SelectionModifiedCallback);
  this->SelectionObserver->SetClientData(this);
  this->PointDataArraySelection->AddObserver(vtkCommand::ModifiedEvent, this->SelectionObserver);
  this->CellDataArraySelection->AddObserver(vtkCommand::ModifiedEvent, this->SelectionObserver);
  this->SelectionModifiedDoNotCallModified = 0;
  this->TranslationTable = new TranslationTableType;

  this->SetNumberOfInputPorts(0);
}

//------------------------------------------------------------------------------
vtkGenericEnSightReader::~vtkGenericEnSightReader()
{
  int i;

  if (this->Reader)
  {
    this->Reader->Delete();
    this->Reader = nullptr;
  }
  delete this->IS;
  this->IS = nullptr;

  delete[] this->CaseFileName;
  this->CaseFileName = nullptr;

  delete[] this->GeometryFileName;
  this->GeometryFileName = nullptr;

  delete[] this->FilePath;
  this->FilePath = nullptr;

  if (this->NumberOfVariables > 0)
  {
    for (i = 0; i < this->NumberOfVariables; i++)
    {
      delete[] this->VariableDescriptions[i];
    }
    delete[] this->VariableDescriptions;
    delete[] this->VariableTypes;
    this->VariableDescriptions = nullptr;
    this->VariableTypes = nullptr;
  }
  if (this->NumberOfComplexVariables > 0)
  {
    for (i = 0; i < this->NumberOfComplexVariables; i++)
    {
      delete[] this->ComplexVariableDescriptions[i];
    }
    delete[] this->ComplexVariableDescriptions;
    delete[] this->ComplexVariableTypes;
    this->ComplexVariableDescriptions = nullptr;
    this->ComplexVariableTypes = nullptr;
  }

  this->SetTimeSets(nullptr);
  this->CellDataArraySelection->RemoveObserver(this->SelectionObserver);
  this->PointDataArraySelection->RemoveObserver(this->SelectionObserver);
  this->SelectionObserver->Delete();
  this->CellDataArraySelection->Delete();
  this->PointDataArraySelection->Delete();
  delete this->TranslationTable;
}

//------------------------------------------------------------------------------
int vtkGenericEnSightReader::CanReadFile(const char* casefilename)
{
  return IsEnSightFile(casefilename);
}

//------------------------------------------------------------------------------
bool vtkGenericEnSightReader::IsEnSightFile(const char* casefilename)
{
  vtkGenericEnSightReader* reader = vtkGenericEnSightReader::New();
  reader->SetCaseFileName(casefilename);
  int type = reader->DetermineEnSightVersion(1);
  reader->Delete();
  return (type != -1);
}

//------------------------------------------------------------------------------
int vtkGenericEnSightReader::RequestData(vtkInformation* vtkNotUsed(request),
  vtkInformationVector** vtkNotUsed(inputVector), vtkInformationVector* outputVector)
{
  int i;

  if (!this->Reader)
  {
    return 0;
  }

  vtkInformation* outInfo = outputVector->GetInformationObject(0);

  // Set the real reader's data array selections from ours.
  this->SetReaderDataArraySelectionSetsFromSelf();

  this->Reader->SetTimeValue(this->GetTimeValue());
  this->Reader->UpdateInformation();
  vtkInformation* tmpOutInfo = this->Reader->GetExecutive()->GetOutputInformation(0);
  if (outInfo->Has(vtkStreamingDemandDrivenPipeline::UPDATE_TIME_STEP()))
  {
    tmpOutInfo->Set(vtkStreamingDemandDrivenPipeline::UPDATE_TIME_STEP(),
      outInfo->Get(vtkStreamingDemandDrivenPipeline::UPDATE_TIME_STEP()));
  }

  // GHOST LEVEL
  // uncomment these lines below if you want to active
  // the ghost level system
  /*
  if (outInfo->Has(vtkStreamingDemandDrivenPipeline::UPDATE_NUMBER_OF_GHOST_LEVELS()))
    {
    tmpOutInfo->CopyEntry(
      outInfo,
      vtkStreamingDemandDrivenPipeline::UPDATE_NUMBER_OF_GHOST_LEVELS());
    }
   */

  this->Reader->Update();

  this->NumberOfScalarsPerNode = this->Reader->GetNumberOfScalarsPerNode();
  this->NumberOfVectorsPerNode = this->Reader->GetNumberOfVectorsPerNode();
  this->NumberOfTensorsAsymPerNode = this->Reader->GetNumberOfTensorsAsymPerNode();
  this->NumberOfTensorsSymmPerNode = this->Reader->GetNumberOfTensorsSymmPerNode();
  this->NumberOfScalarsPerElement = this->Reader->GetNumberOfScalarsPerElement();
  this->NumberOfVectorsPerElement = this->Reader->GetNumberOfVectorsPerElement();
  this->NumberOfTensorsAsymPerElement = this->Reader->GetNumberOfTensorsAsymPerElement();
  this->NumberOfTensorsSymmPerElement = this->Reader->GetNumberOfTensorsSymmPerElement();
  this->NumberOfScalarsPerMeasuredNode = this->Reader->GetNumberOfScalarsPerMeasuredNode();
  this->NumberOfVectorsPerMeasuredNode = this->Reader->GetNumberOfVectorsPerMeasuredNode();
  this->NumberOfComplexScalarsPerNode = this->Reader->GetNumberOfComplexScalarsPerNode();
  this->NumberOfComplexVectorsPerNode = this->Reader->GetNumberOfComplexVectorsPerNode();
  this->NumberOfComplexScalarsPerElement = this->Reader->GetNumberOfComplexScalarsPerElement();
  this->NumberOfComplexVectorsPerElement = this->Reader->GetNumberOfComplexScalarsPerElement();

  vtkMultiBlockDataSet* output =
    vtkMultiBlockDataSet::SafeDownCast(outInfo->Get(vtkDataObject::DATA_OBJECT()));

  output->ShallowCopy(this->Reader->GetOutput());

  if (this->NumberOfVariables > 0)
  {
    for (i = 0; i < this->NumberOfVariables; i++)
    {
      delete[] this->VariableDescriptions[i];
    }
    delete[] this->VariableDescriptions;
    delete[] this->VariableTypes;
    this->VariableDescriptions = nullptr;
    this->VariableTypes = nullptr;
    this->NumberOfVariables = 0;
  }
  if (this->NumberOfComplexVariables > 0)
  {
    for (i = 0; i < this->NumberOfComplexVariables; i++)
    {
      delete[] this->ComplexVariableDescriptions[i];
    }
    delete[] this->ComplexVariableDescriptions;
    delete[] this->ComplexVariableTypes;
    this->ComplexVariableDescriptions = nullptr;
    this->ComplexVariableTypes = nullptr;
    this->NumberOfComplexVariables = 0;
  }

  for (i = 0; i < this->Reader->GetNumberOfVariables(); i++)
  {
    this->AddVariableDescription(this->Reader->GetDescription(i));
    this->AddVariableType(this->Reader->GetVariableType(i));
    this->NumberOfVariables++;
  }
  for (i = 0; i < this->Reader->GetNumberOfComplexVariables(); i++)
  {
    this->AddComplexVariableDescription(this->Reader->GetComplexDescription(i));
    this->AddComplexVariableType(this->Reader->GetComplexVariableType(i));
    this->NumberOfComplexVariables++;
  }

  // Apply a Tetrahedralize filter to prevent non manifold triangle
  if (this->ApplyTetrahedralize)
  {
    vtkNew<vtkDataSetTriangleFilter> tetrahedralizeFilter;
    tetrahedralizeFilter->SetInputData(output);
    tetrahedralizeFilter->Update();
    output->CompositeShallowCopy(
      vtkMultiBlockDataSet::SafeDownCast(tetrahedralizeFilter->GetOutputDataObject(0)));
  }

  return 1;
}

//------------------------------------------------------------------------------
void vtkGenericEnSightReader::SetTimeValue(double value)
{
  vtkDebugMacro(<< this->GetClassName() << " (" << this << "): setting TimeValue to " << value);
  if (this->TimeValue != value)
  {
    this->TimeValue = value;
    this->Modified();
  }
  this->TimeValueInitialized = 1;
}

//------------------------------------------------------------------------------
void vtkGenericEnSightReader::SanitizeFileName(std::string& filename)
{
  char quotes = '\"';
  size_t found = filename.find(quotes);
  if (found != std::string::npos)
  {
    filename.erase(std::remove(filename.begin(), filename.end(), quotes), filename.end());
  }

  // the strings we're using this on probably only have trailing spaces, but we'll
  // include others just in case
  std::string whitespaces(" \t\n\r");
  found = filename.find_last_not_of(whitespaces);
  if (found != std::string::npos)
  {
    filename.erase(found + 1);
  }
}

//------------------------------------------------------------------------------
int vtkGenericEnSightReader::DetermineEnSightVersion(int quiet)
{
  char line[256], subLine[256], subLine1[256], subLine2[256], binaryLine[81];
  char* binaryLinePtr;
  int stringRead;
  int timeSet = 1, fileSet = 1;
  int xtimeSet = 1, xfileSet = 1;
  char* fileName = nullptr;
  int lineRead;
  if (!this->CaseFileName)
  {
    if (!quiet)
      vtkErrorMacro("A case file name must be specified.");
    return -1;
  }
  std::string sfilename;
  if (this->FilePath)
  {
    sfilename = this->FilePath;
    if (sfilename.at(sfilename.length() - 1) != '/')
    {
      sfilename += "/";
    }
    sfilename += this->CaseFileName;
    vtkDebugMacro("full path to case file: " << sfilename);
  }
  else
  {
    sfilename = this->CaseFileName;
  }

  this->IS = new vtksys::ifstream(sfilename.c_str(), ios::in);
  if (this->IS->fail())
  {
    if (!quiet)
      vtkErrorMacro("Unable to open file: " << sfilename);
    delete this->IS;
    this->IS = nullptr;
    return -1;
  }

  this->ReadNextDataLine(line);

  if (strncmp(line, "FORMAT", 6) == 0)
  {
    // found the FORMAT section
    vtkDebugMacro("*** FORMAT section");
    this->ReadNextDataLine(line);

    stringRead = sscanf(line, " %*s %*s %s", subLine);
    if (stringRead == 1)
    {
      sscanf(line, " %*s %s %s", subLine1, subLine2);
      if (strncmp(subLine1, "ensight", 7) == 0)
      {
        if (strncmp(subLine2, "gold", 4) == 0)
        {
          lineRead = this->ReadNextDataLine(line);
          while (strncmp(line, "GEOMETRY", 8) != 0 && lineRead != 0)
          {
            lineRead = this->ReadNextDataLine(line);
          }
          if (lineRead == 0)
          {
            return -1;
          }
          if (strncmp(line, "GEOMETRY", 8) == 0)
          {
            // found the GEOMETRY section
            vtkDebugMacro("*** GEOMETRY section");

            this->ReadNextDataLine(line);
            if (strncmp(line, "model:", 6) == 0)
            {
              if (sscanf(line, " %*s %d %d%*[ \t]%[^\t\r\n]", &xtimeSet, &fileSet, subLine) == 3)
              {
                timeSet = xtimeSet;
                fileSet = xfileSet;
                this->SetGeometryFileName(subLine);
              }
              else if (sscanf(line, " %*s %d%*[ \t]%[^\t\r\n]", &xtimeSet, subLine) == 2)
              {
                timeSet = xtimeSet;
                this->SetGeometryFileName(subLine);
              }
              else if (sscanf(line, " %*s %[^\t\r\n]", subLine) == 1)
              {
                this->SetGeometryFileName(subLine);
              }
            } // geometry file name set
            delete this->IS;
            this->IS = nullptr;

            if (!this->GeometryFileName || this->GeometryFileName[0] == '\0')
            {
              if (!quiet)
              {
                vtkErrorMacro("A GeometryFileName must be specified in the case file.");
              }
              return 0;
            }

            fileName = new char[strlen(this->GeometryFileName) + 1];
            strcpy(fileName, this->GeometryFileName);

            if (strrchr(fileName, '*') != nullptr)
            {
              // RE-open case file; find right time set and fill in
              // wildcards from there if possible; if not, then find right
              // file set and fill in wildcards from there.
              if (this->ReplaceWildcards(fileName, timeSet, fileSet) == 0)
              {
                if (!quiet)
                {
                  vtkErrorMacro("upon DetermineEnSightVersion()'s call to ReplaceWildCards()");
                }
                return -1;
              }
            }
            // The EnSight Gold Case file can reference the geometry file using quotes,
            // in case
            std::string filenameString(fileName);
            this->SanitizeFileName(filenameString);
            sfilename = "";
            if (this->FilePath)
            {
              sfilename = this->FilePath;
              if (sfilename.at(sfilename.length() - 1) != '/')
              {
                sfilename += "/";
              }
              sfilename += filenameString;
              vtkDebugMacro("full path to geometry file: " << sfilename);
            }
            else
            {
              sfilename = filenameString;
            }
            // got full path to geometry file

            this->IFile = vtksys::SystemTools::Fopen(sfilename, "rb");
            if (this->IFile == nullptr)
            {
              if (!quiet)
              {
                vtkErrorMacro("Unable to open file: " << sfilename);
                vtkWarningMacro("Assuming binary file.");
              }
              this->IFile = nullptr;
              delete[] fileName;
              return vtkGenericEnSightReader::ENSIGHT_GOLD_BINARY;
            } // end if IFile == nullptr

            this->ReadBinaryLine(binaryLine);
            binaryLine[80] = '\0';
            // because fortran stores 4 length bytes at the start,
            // if the strlen is less than 4, skip the first 4
            // and jump to the start of the actual string
            binaryLinePtr = &binaryLine[0];
            if (strlen(binaryLine) < 4)
            {
              binaryLinePtr = &binaryLine[4];
            }
            sscanf(binaryLinePtr, " %*s %s", subLine);
            // If the file is ascii, there might not be a null
            // terminator. This leads to a UMR in sscanf
            if (strncmp(subLine, "Binary", 6) == 0 || strncmp(subLine, "binary", 6) == 0)
            {
              fclose(this->IFile);
              this->IFile = nullptr;
              delete[] fileName;
              return vtkGenericEnSightReader::ENSIGHT_GOLD_BINARY;
            } // end if binary

            fclose(this->IFile);
            this->IFile = nullptr;
            delete[] fileName;
            return vtkGenericEnSightReader::ENSIGHT_GOLD;
          } // if we found the geometry section in the case file
        }   // if ensight gold file
      }     // if regular ensight file (not master_server)
      else if (strncmp(subLine1, "master_server", 13) == 0)
      {
        return vtkGenericEnSightReader::ENSIGHT_MASTER_SERVER;
      }
    } // if the type line is like "type: xxxx xxxx"
    else
    {
      this->ReadNextDataLine(line);
      if (strncmp(line, "GEOMETRY", 8) == 0)
      {
        // found the GEOMETRY section
        vtkDebugMacro("*** GEOMETRY section");

        this->ReadNextDataLine(line);
        if (strncmp(line, "model:", 6) == 0)
        {
          if (sscanf(line, " %*s %d %d%*[ \t]%s", &xtimeSet, &fileSet, subLine) == 3)
          {
            timeSet = xtimeSet;
            fileSet = xfileSet;
            this->SetGeometryFileName(subLine);
          }
          else if (sscanf(line, " %*s %d%*[ \t]%s", &xtimeSet, subLine) == 2)
          {
            timeSet = xtimeSet;
            this->SetGeometryFileName(subLine);
          }
          else if (sscanf(line, " %*s %s", subLine) == 1)
          {
            this->SetGeometryFileName(subLine);
          }
        } // geometry file name set

        delete this->IS;
        this->IS = nullptr;

        if (!this->GeometryFileName || this->GeometryFileName[0] == '\0')
        {
          if (!quiet)
          {
            vtkErrorMacro("A GeometryFileName must be specified in the case file.");
          }
          return 0;
        }

        fileName = new char[strlen(this->GeometryFileName) + 1];
        strcpy(fileName, this->GeometryFileName);

        if (strrchr(fileName, '*') != nullptr)
        {
          // reopen case file; find right time set and fill in wildcards from
          // there if possible; if not, then find right file set and fill in
          // wildcards from there.
          this->ReplaceWildcards(fileName, timeSet, fileSet);
        }
        sfilename = "";
        if (this->FilePath)
        {
          sfilename = this->FilePath;
          if (sfilename.at(sfilename.length() - 1) != '/')
          {
            sfilename += "/";
          }
          sfilename += fileName;
          vtkDebugMacro("full path to geometry file: " << sfilename);
        }
        else
        {
          sfilename = fileName;
        }

        // got full path to geometry file

        this->IFile = vtksys::SystemTools::Fopen(sfilename, "rb");
        if (this->IFile == nullptr)
        {
          if (!quiet)
          {
            vtkErrorMacro("Unable to open file: " << sfilename);
            vtkWarningMacro("Assuming binary file.");
          }
          this->IFile = nullptr;
          delete[] fileName;
          return vtkGenericEnSightReader::ENSIGHT_6_BINARY;
        } // end if IFile == nullptr

        this->ReadBinaryLine(binaryLine);
        // If the file is ascii, there might not be a null
        // terminator. This leads to a UMR in sscanf
        binaryLine[80] = '\0';
        sscanf(binaryLine, " %*s %s", subLine);
        if (strncmp(subLine, "Binary", 6) == 0)
        {
          fclose(this->IFile);
          this->IFile = nullptr;
          delete[] fileName;
          return vtkGenericEnSightReader::ENSIGHT_6_BINARY;
        } // end if binary

        fclose(this->IFile);
        this->IFile = nullptr;
        delete[] fileName;
        return vtkGenericEnSightReader::ENSIGHT_6;
      } // if we found the geometry section in the case file
    }   // not ensight gold
  }     // if we found the format section in the case file

  delete[] fileName;

  return -1;
}

//------------------------------------------------------------------------------
void vtkGenericEnSightReader::ClearForNewCaseFileName()
{
  this->TranslationTable->PartIdMap.clear();
}

//------------------------------------------------------------------------------
void vtkGenericEnSightReader::SetCaseFileName(const char* fileName)
{
  char* endingSlash;
  char *path, *newFileName;
  int position, numChars;

  if (this->CaseFileName && fileName && (!strcmp(this->CaseFileName, fileName)))
  {
    return;
  }
  delete[] this->CaseFileName;
  if (fileName)
  {
    this->CaseFileName = new char[strlen(fileName) + 1];
    strcpy(this->CaseFileName, fileName);
  }
  else
  {
    this->CaseFileName = nullptr;
  }

  this->ClearForNewCaseFileName();
  this->Modified();
  if (!this->CaseFileName)
  {
    return;
  }

  // strip off the path and save it as FilePath if it was included in the
  // filename
  endingSlash = strrchr(this->CaseFileName, '/');
  if (endingSlash == nullptr)
  {
    // check Windows directory separator
    endingSlash = strrchr(this->CaseFileName, '\\');
  }

  if (endingSlash)
  {
    position = endingSlash - this->CaseFileName + 1;
    path = new char[position + 1];
    numChars = static_cast<int>(strlen(this->CaseFileName));
    newFileName = new char[numChars - position + 1];
    strcpy(path, "");
    strncat(path, this->CaseFileName, position);
    this->SetFilePath(path);
    strcpy(newFileName, this->CaseFileName + position);
    strcpy(this->CaseFileName, newFileName);
    delete[] path;
    delete[] newFileName;
  }
}

//------------------------------------------------------------------------------
// Internal function to read in a line up to 256 characters.
// Returns zero if there was an error.
int vtkGenericEnSightReader::ReadLine(char result[256])
{
  this->IS->getline(result, 256);
  //  if (this->IS->eof())
  if (this->IS->fail())
  {
    // Reset the error flag before returning. This way, we can keep working
    // if we handle the error downstream.
    this->IS->clear();
    return 0;
  }

  return 1;
}

//------------------------------------------------------------------------------
// Internal function to read in a line (from a binary file) up
// to 80 characters.  Returns zero if there was an error.
int vtkGenericEnSightReader::ReadBinaryLine(char result[80])
{
  int n = static_cast<int>(fread(result, sizeof(char), 80, this->IFile));

  if ((n < 80) || feof(this->IFile) || ferror(this->IFile))
  {
    return 0;
  }

  return 1;
}

//------------------------------------------------------------------------------
// Determines whether a non-comment line should be skipped.
// Currently skips:
//  'maximum time steps:'
//
bool vtkGenericEnSightReader::SkipDataLine(char line[256])
{
  return (strncmp(line, "maximum time steps:", 19) == 0);
}

//------------------------------------------------------------------------------
// Internal function that skips blank lines and comment lines
// and reads the next line it finds (up to 256 characters).
// Returns 0 is there was an error.
int vtkGenericEnSightReader::ReadNextDataLine(char result[256])
{
  int isComment = 1;
  int value = 1;

  while (isComment && value)
  {
    value = this->ReadLine(result);
    if (*result && result[0] != '#' && !this->SkipDataLine(result))
    {
      size_t len = strlen(result);
      unsigned int i = 0;
      while (i < len && (static_cast<unsigned int>(result[i]) <= 255) && isspace(result[i]))
      {
        ++i;
      }
      // If there was only space characters this is a comment, thus skip it
      if (i != len)
      {
        // The line was not empty, not beginning by '#' and not composed
        // of only white space, this is not a comment
        isComment = 0;
      }
    }
  }

  return value;
}

//------------------------------------------------------------------------------
int vtkGenericEnSightReader::RequestInformation(
  vtkInformation* request, vtkInformationVector** inputVector, vtkInformationVector* outputVector)
{
  int version = this->DetermineEnSightVersion();
  int createReader = 1;
  if (version == vtkGenericEnSightReader::ENSIGHT_6)
  {
    vtkDebugMacro("EnSight6");
    if (this->Reader)
    {
      if (strcmp(this->Reader->GetClassName(), "vtkEnSight6Reader") == 0)
      {
        createReader = 0;
      }
      else
      {
        this->Reader->Delete();
      }
    }
    if (createReader)
    {
      this->Reader = vtkEnSight6Reader::New();
    }
  }
  else if (version == vtkGenericEnSightReader::ENSIGHT_6_BINARY)
  {
    vtkDebugMacro("EnSight6 binary");
    if (this->Reader)
    {
      if (strcmp(this->Reader->GetClassName(), "vtkEnSight6BinaryReader") == 0)
      {
        createReader = 0;
      }
      else
      {
        this->Reader->Delete();
      }
    }
    if (createReader)
    {
      this->Reader = vtkEnSight6BinaryReader::New();
    }
  }
  else if (version == vtkGenericEnSightReader::ENSIGHT_GOLD)
  {
    vtkDebugMacro("EnSightGold");
    if (this->Reader)
    {
      if (strcmp(this->Reader->GetClassName(), "vtkEnSightGoldReader") == 0)
      {
        createReader = 0;
      }
      else
      {
        this->Reader->Delete();
      }
    }
    if (createReader)
    {
      this->Reader = vtkEnSightGoldReader::New();
    }
  }
  else if (version == vtkGenericEnSightReader::ENSIGHT_GOLD_BINARY)
  {
    vtkDebugMacro("EnSightGold binary");
    if (this->Reader)
    {
      if (strcmp(this->Reader->GetClassName(), "vtkEnSightGoldBinaryReader") == 0)
      {
        createReader = 0;
      }
      else
      {
        this->Reader->Delete();
      }
    }
    if (createReader)
    {
      this->Reader = vtkEnSightGoldBinaryReader::New();
    }
  }
  else
  {
    vtkErrorMacro("Error determining EnSightVersion");
    this->EnSightVersion = -1;
    return 0;
  }
  this->EnSightVersion = version;

  // Copy current array selections to internal reader.
  this->SetReaderDataArraySelectionSetsFromSelf();
  this->Reader->SetReadAllVariables(this->ReadAllVariables);
  this->Reader->SetCaseFileName(this->GetCaseFileName());
  this->Reader->SetFilePath(this->GetFilePath());

  // The following line, explicitly initializing this->ByteOrder to
  // FILE_UNKNOWN_ENDIAN,  MUST !!NOT!! be removed as it is used to
  // force vtkEnSightGoldBinaryReader::ReadPartId(...) to determine
  // the actual endian type. Otherwise the endian type, the default
  // value from combobox 'Byte Order' of the user interface -------
  // FILE_BIG_ENDIAN unless the user manually toggles the combobox,
  // would be forwarded to  this->Reader->ByteOrder through the next
  // line and therefore would prevent vtkEnSightGoldBinaryReader::
  // ReadPartId(...) from automatically checking the endian type. As
  // a consequence, little-endian files such as the one mentioned in
  // bug #0008237 would not be loadable. The following line might be
  // removed ONLY WHEN the combobox is removed through
  // ParaViews\Servers\ServerManager\Resources\readers.xml.
  // Thus it is highly suggested that the following line be retained
  // to guarantee the fix to bug #0007424 -- automatic determination
  // of the endian type.
  this->ByteOrder = FILE_UNKNOWN_ENDIAN;

  this->Reader->SetByteOrder(this->ByteOrder);
  this->Reader->RequestInformation(request, inputVector, outputVector);
  this->Reader->SetParticleCoordinatesByIndex(this->ParticleCoordinatesByIndex);

  this->SetTimeSets(this->Reader->GetTimeSets());
  if (!this->TimeValueInitialized)
  {
    this->SetTimeValue(this->Reader->GetTimeValue());
  }
  this->MinimumTimeValue = this->Reader->GetMinimumTimeValue();
  this->MaximumTimeValue = this->Reader->GetMaximumTimeValue();

  // Copy new data array selections from internal reader.
  this->SetDataArraySelectionSetsFromReader();

  return 1;
}

//------------------------------------------------------------------------------
void vtkGenericEnSightReader::AddVariableDescription(const char* description)
{
  int size = this->NumberOfVariables;
  int i;

  char** newDescriptionList = new char*[size]; // temporary array

  // copy descriptions to temporary array
  for (i = 0; i < size; i++)
  {
    newDescriptionList[i] = new char[strlen(this->VariableDescriptions[i]) + 1];
    strcpy(newDescriptionList[i], this->VariableDescriptions[i]);
    delete[] this->VariableDescriptions[i];
  }
  delete[] this->VariableDescriptions;

  // make room for new description
  this->VariableDescriptions = new char*[size + 1];

  // copy existing descriptions back to first array
  for (i = 0; i < size; i++)
  {
    this->VariableDescriptions[i] = new char[strlen(newDescriptionList[i]) + 1];
    strcpy(this->VariableDescriptions[i], newDescriptionList[i]);
    delete[] newDescriptionList[i];
  }
  delete[] newDescriptionList;

  // add new description at end of first array
  this->VariableDescriptions[size] = new char[strlen(description) + 1];
  strcpy(this->VariableDescriptions[size], description);
  vtkDebugMacro("description: " << this->VariableDescriptions[size]);
}

//------------------------------------------------------------------------------
void vtkGenericEnSightReader::AddComplexVariableDescription(const char* description)
{
  int i;
  int size = this->NumberOfComplexVariables;
  char** newDescriptionList = new char*[size]; // temporary array

  // copy descriptions to temporary array
  for (i = 0; i < size; i++)
  {
    newDescriptionList[i] = new char[strlen(this->ComplexVariableDescriptions[i]) + 1];
    strcpy(newDescriptionList[i], this->ComplexVariableDescriptions[i]);
    delete[] this->ComplexVariableDescriptions[i];
  }
  delete[] this->ComplexVariableDescriptions;

  // make room for new description
  this->ComplexVariableDescriptions = new char*[size + 1];

  // copy existing descriptions back to first array
  for (i = 0; i < size; i++)
  {
    this->ComplexVariableDescriptions[i] = new char[strlen(newDescriptionList[i]) + 1];
    strcpy(this->ComplexVariableDescriptions[i], newDescriptionList[i]);
    delete[] newDescriptionList[i];
  }
  delete[] newDescriptionList;

  // add new description at end of first array
  this->ComplexVariableDescriptions[size] = new char[strlen(description) + 1];
  strcpy(this->ComplexVariableDescriptions[size], description);
  vtkDebugMacro("description: " << this->ComplexVariableDescriptions[size]);
}

//------------------------------------------------------------------------------
int vtkGenericEnSightReader::GetNumberOfVariables(int type)
{
  switch (type)
  {
    case vtkEnSightReader::SCALAR_PER_NODE:
      return this->GetNumberOfScalarsPerNode();
    case vtkEnSightReader::VECTOR_PER_NODE:
      return this->GetNumberOfVectorsPerNode();
    case vtkEnSightReader::TENSOR_ASYM_PER_NODE:
      return this->GetNumberOfTensorsAsymPerNode();
    case vtkEnSightReader::TENSOR_SYMM_PER_NODE:
      return this->GetNumberOfTensorsSymmPerNode();
    case vtkEnSightReader::SCALAR_PER_ELEMENT:
      return this->GetNumberOfScalarsPerElement();
    case vtkEnSightReader::VECTOR_PER_ELEMENT:
      return this->GetNumberOfVectorsPerElement();
    case vtkEnSightReader::TENSOR_ASYM_PER_ELEMENT:
      return this->GetNumberOfTensorsAsymPerElement();
    case vtkEnSightReader::TENSOR_SYMM_PER_ELEMENT:
      return this->GetNumberOfTensorsSymmPerElement();
    case vtkEnSightReader::SCALAR_PER_MEASURED_NODE:
      return this->GetNumberOfScalarsPerMeasuredNode();
    case vtkEnSightReader::VECTOR_PER_MEASURED_NODE:
      return this->GetNumberOfVectorsPerMeasuredNode();
    case vtkEnSightReader::COMPLEX_SCALAR_PER_NODE:
      return this->GetNumberOfComplexScalarsPerNode();
    case vtkEnSightReader::COMPLEX_VECTOR_PER_NODE:
      return this->GetNumberOfComplexVectorsPerNode();
    case vtkEnSightReader::COMPLEX_SCALAR_PER_ELEMENT:
      return this->GetNumberOfComplexScalarsPerElement();
    case vtkEnSightReader::COMPLEX_VECTOR_PER_ELEMENT:
      return this->GetNumberOfComplexVectorsPerElement();
    default:
      vtkWarningMacro("unknown variable type");
      return -1;
  }
}

//------------------------------------------------------------------------------
const char* vtkGenericEnSightReader::GetDescription(int n)
{
  if (n < this->NumberOfVariables)
  {
    return this->VariableDescriptions[n];
  }
  return nullptr;
}

//------------------------------------------------------------------------------
const char* vtkGenericEnSightReader::GetComplexDescription(int n)
{
  if (n < this->NumberOfComplexVariables)
  {
    return this->ComplexVariableDescriptions[n];
  }
  return nullptr;
}

//------------------------------------------------------------------------------
const char* vtkGenericEnSightReader::GetDescription(int n, int type)
{
  int i, numMatches = 0;
  bool complexType = type == vtkEnSightReader::COMPLEX_SCALAR_PER_NODE ||
    type == vtkEnSightReader::COMPLEX_VECTOR_PER_NODE ||
    type == vtkEnSightReader::COMPLEX_SCALAR_PER_ELEMENT ||
    type == vtkEnSightReader::COMPLEX_VECTOR_PER_ELEMENT;

  if (!complexType)
  {
    for (i = 0; i < this->NumberOfVariables; i++)
    {
      if (this->VariableTypes[i] == type)
      {
        if (numMatches == n)
        {
          return this->VariableDescriptions[i];
        }
        else
        {
          numMatches++;
        }
      }
    }
  }
  else
  {
    for (i = 0; i < this->NumberOfVariables; i++)
    {
      if (this->ComplexVariableTypes[i] == type)
      {
        if (numMatches == n)
        {
          return this->ComplexVariableDescriptions[i];
        }
        else
        {
          numMatches++;
        }
      }
    }
  }

  return nullptr;
}

//------------------------------------------------------------------------------
void vtkGenericEnSightReader::AddVariableType(int variableType)
{
  int size;
  int i;
  int* types;

  size = this->NumberOfVariables;

  types = new int[size];

  for (i = 0; i < size; i++)
  {
    types[i] = this->VariableTypes[i];
  }
  delete[] this->VariableTypes;

  this->VariableTypes = new int[size + 1];
  for (i = 0; i < size; i++)
  {
    this->VariableTypes[i] = types[i];
  }
  delete[] types;
  this->VariableTypes[size] = variableType;
  vtkDebugMacro("variable type: " << this->VariableTypes[size]);
}

//------------------------------------------------------------------------------
void vtkGenericEnSightReader::AddComplexVariableType(int variableType)
{
  int i;
  int* types = nullptr;
  int size = this->NumberOfComplexVariables;

  if (size > 0)
  {
    types = new int[size];
    for (i = 0; i < size; i++)
    {
      types[i] = this->ComplexVariableTypes[i];
    }
    delete[] this->ComplexVariableTypes;
  }

  this->ComplexVariableTypes = new int[size + 1];
  for (i = 0; i < size; i++)
  {
    this->ComplexVariableTypes[i] = types[i];
  }

  if (size > 0)
  {
    delete[] types;
  }
  this->ComplexVariableTypes[size] = variableType;
  vtkDebugMacro("complex variable type: " << this->ComplexVariableTypes[size]);
}

//------------------------------------------------------------------------------
int vtkGenericEnSightReader::GetVariableType(int n)
{
  if (n < this->NumberOfVariables)
  {
    return this->VariableTypes[n];
  }
  return -1;
}

//------------------------------------------------------------------------------
int vtkGenericEnSightReader::GetComplexVariableType(int n)
{
  if (n < this->NumberOfComplexVariables)
  {
    return this->ComplexVariableTypes[n];
  }
  return -1;
}

//------------------------------------------------------------------------------
int vtkGenericEnSightReader::ReplaceWildcards(char* fileName, int timeSet, int fileSet)
{
  char line[256], subLine[256];
  int cmpTimeSet, cmpFileSet, fileNameNum, lineReadResult, lineScanResult;

  std::string sfilename;
  if (this->FilePath)
  {
    sfilename = this->FilePath;
    if (sfilename.at(sfilename.length() - 1) != '/')
    {
      sfilename += "/";
    }
    sfilename += this->CaseFileName;
    vtkDebugMacro("full path to case file: " << sfilename);
  }
  else
  {
    sfilename = this->CaseFileName;
  }

  // We have got a valid CASE file name
  this->IS = new vtksys::ifstream(sfilename.c_str(), ios::in);

  // Below is a revamped version of the code in support of inline & non-inline
  // file name numbers, in a CASE file, of which the first one is obtained to
  // make a geometry file name, through wildcards replacement, used to determine
  // the specific EnSight version.

  // Locate the 'TIME' section
  do
  {
    if (this->ReadNextDataLine(line) == 0)
    {
      vtkErrorMacro("ReplaceWildCards() failed to find the 'TIME' section!");
      delete this->IS;
      this->IS = nullptr;
      return 0;
    }
  } while (strncmp(line, "TIME", 4) != 0);

  // Locate the very 'time set' entry by the index
  cmpTimeSet = -10000;
  do
  {
    if (this->ReadNextDataLine(line) == 0)
    {
      vtkErrorMacro("ReplaceWildCards() failed to find the target 'time set' entry!");
      delete this->IS;
      this->IS = nullptr;
      return 0;
    }

    // 'time set: <int>' --- where to obtain cmpTimeSet, a time set index
    lineScanResult = sscanf(line, "%*s %s %d", subLine, &cmpTimeSet);
  } while (lineScanResult != 2 || strncmp(line, "time", 4) != 0 ||
    strncmp(subLine, "set", 3) != 0 || cmpTimeSet != timeSet);

  // Skip 'time set: <int>' and 'number of steps: <int>' to go to
  // 'filename xxx: ...' --- where to obtain the actual file name number(s)
  for (int i = 0; i < 2; i++)
  {
    lineReadResult = this->ReadNextDataLine(line);
    if (lineReadResult == 0 ||
      // check 'filename xxx: ...' upon the second line (i = 1)
      (i == 1 && (strncmp(line, "filename", 8) != 0 || sscanf(line, "%*s %s", subLine) != 1)))
    {
      vtkErrorMacro("ReplaceWildCards() failed to find the target 'filename ...: ...' entry!");
      delete this->IS;
      this->IS = nullptr;
      return 0;
    }
  }

  fileNameNum = -10000;

  // 'filename numbers: ...'
  if (strncmp(subLine, "numbers", 7) == 0)
  {
    // The filename number(s) may be provided on the line(s) following
    // 'filename numbers:', as is usually the case --- not "inline". Thus we
    // need to go to the FIRST line that indeed contains the filename number(s).
    // Note that we only need to obtain the FIRST file name number since a
    // single geometry file allows us to determine the EnSight version. This is
    // based on the reasonable assumption that all geometry files referenced by
    // a CASE file have the same EnSight version.

    // not "inline"
    if (sscanf(line, "%*s %*s %d", &fileNameNum) != 1)
    {
      // let's go to the next VALID line that might be several empty lines apart
      if (this->ReadNextDataLine(line) == 0)
      {
        vtkErrorMacro("ReplaceWildCards() failed to obtain any non-inline file name number!");
        delete this->IS;
        this->IS = nullptr;
        return 0;
      }

      // obtain the first file name number from the next valid line
      sscanf(line, "%d", &fileNameNum);
    }
  }
  // 'filename start number: ...' --- followed by 'filename increment: ...'
  else
  {
    char subSubLine[256];
    lineScanResult = sscanf(line, "%*s %s %s %d", subLine, subSubLine, &fileNameNum);
    if (lineScanResult != 3 || strncmp(subLine, "start", 5) != 0 ||
      strncmp(subSubLine, "number", 6) != 0)
    {
      vtkErrorMacro("ReplaceWildCards() failed to find 'filename start number: <int>'!");
      delete this->IS;
      this->IS = nullptr;
      return 0;
    }
  }

  // Let's resort to the 'FILE' section, just in case of a failure so far
  if (fileNameNum == -10000)
  {
    // Locate the 'FILE' section
    do
    {
      if (this->ReadNextDataLine(line) == 0)
      {
        vtkErrorMacro("ReplaceWildCards() failed to find the optional 'FILE' section!");
        delete this->IS;
        this->IS = nullptr;
        return 0;
      }
    } while (strncmp(line, "FILE", 4) != 0);

    // Locate the very 'file set' entry by the index
    cmpFileSet = -10000;
    do
    {
      if (this->ReadNextDataLine(line) == 0)
      {
        vtkErrorMacro("ReplaceWildCards() failed to find the target 'file set' entry!");
        delete this->IS;
        this->IS = nullptr;
        return 0;
      }

      // 'file set: <int>' --- to obtain cmpFileSet, a file set index
      lineScanResult = sscanf(line, "%*s %s %d", subLine, &cmpFileSet);
    } while (lineScanResult != 2 || strncmp(line, "file", 4) != 0 ||
      strncmp(subLine, "set", 3) != 0 || cmpFileSet != fileSet);

    // Skip 'file set: <int>' to go to
    // 'filename index: <int>' --- where to obtain ONE actual file name
    // Note that we here do NOT allow any non-'inline' scenarios since
    // there is ONE AND ONLY ONE integer value, within a 'filename index: <int>'
    // entry, that is used to specify a file name index. Thus any violation
    // of this reasonable assumption is considered to use an invalid EnSight
    // format that needs to be corrected by the EnSight CASE file user.
    lineReadResult = this->ReadNextDataLine(line);
    lineScanResult = sscanf(line, "%*s %s %d", subLine, &fileNameNum);
    if (lineReadResult == 0 || lineScanResult != 2 || strncmp(line, "filename", 8) != 0 ||
      strncmp(subLine, "index", 5) != 0)
    {
      vtkErrorMacro("ReplaceWildCards() failed to find 'filename index: <int>'!");
      delete this->IS;
      this->IS = nullptr;
      return 0;
    }
  }

  // So far we have got a file name index
  vtkGenericEnSightReader::ReplaceWildcardsHelper(fileName, fileNameNum);
  delete this->IS;
  this->IS = nullptr;

  return 1;
}

//------------------------------------------------------------------------------
void vtkGenericEnSightReader::ReplaceWildcardsHelper(char* filename, int num)
{
  // TODO Rewrite using std::regex and std::string

  size_t wildcardPos = strcspn(filename, "*");

  // Check if no wildcard
  if (strlen(filename) == wildcardPos)
  {
    return;
  }

  size_t numWildcards = strspn(filename + wildcardPos, "*");

  char pattern[32];
  if (numWildcards == 1)
  {
    strcpy(pattern, "%d");
  }
  else
  {
    snprintf(pattern, sizeof(pattern), "%%0%dd", static_cast<int>(numWildcards));
  }

  char numStr[32];
  snprintf(numStr, sizeof(numStr), pattern, num);

  int numStrLen = static_cast<int>(strlen(numStr));
  int len = static_cast<int>(strlen(filename));
  int cnt = 0;
  bool foundWildcard = false;
  char filenameTmp[2048];
  for (int i = 0; i < len; i++)
  {
    if (filename[i] == '*')
    {
      if (!foundWildcard)
      {
        for (int j = 0; j < numStrLen; j++)
        {
          filenameTmp[cnt++] = numStr[j];
        }
        foundWildcard = true;
      }
    }
    else
    {
      filenameTmp[cnt++] = filename[i];
    }
  }
  filenameTmp[cnt] = '\0';
  strcpy(filename, filenameTmp);
}

//------------------------------------------------------------------------------
void vtkGenericEnSightReader::SetByteOrderToBigEndian()
{
  this->ByteOrder = FILE_BIG_ENDIAN;
}

//------------------------------------------------------------------------------
void vtkGenericEnSightReader::SetByteOrderToLittleEndian()
{
  this->ByteOrder = FILE_LITTLE_ENDIAN;
}

//------------------------------------------------------------------------------
const char* vtkGenericEnSightReader::GetByteOrderAsString()
{
  if (this->ByteOrder == FILE_LITTLE_ENDIAN)
  {
    return "LittleEndian";
  }
  else
  {
    return "BigEndian";
  }
}

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

  os << indent << "CaseFileName: " << (this->CaseFileName ? this->CaseFileName : "(none)") << endl;
  os << indent << "FilePath: " << (this->FilePath ? this->FilePath : "(none)") << endl;
  os << indent << "EnSight Version: " << this->EnSightVersion << endl;
  os << indent << "NumberOfComplexVariables: " << this->NumberOfComplexVariables << endl;
  os << indent << "NumberOfVariables: " << this->NumberOfVariables << endl;
  os << indent << "NumberOfComplexScalarsPerNode: " << this->NumberOfComplexScalarsPerNode << endl;
  os << indent << "NumberOfVectorsPerElement :" << this->NumberOfVectorsPerElement << endl;
  os << indent << "NumberOfTensorsAsymPerElement: " << this->NumberOfTensorsAsymPerElement << endl;
  os << indent << "NumberOfTensorsSymmPerElement: " << this->NumberOfTensorsSymmPerElement << endl;
  os << indent << "NumberOfComplexVectorsPerNode: " << this->NumberOfComplexVectorsPerNode << endl;
  os << indent << "NumberOfScalarsPerElement: " << this->NumberOfScalarsPerElement << endl;
  os << indent << "NumberOfComplexVectorsPerElement: " << this->NumberOfComplexVectorsPerElement
     << endl;
  os << indent << "NumberOfComplexScalarsPerElement: " << this->NumberOfComplexScalarsPerElement
     << endl;
  os << indent << "NumberOfTensorsAsymPerNode: " << this->NumberOfTensorsAsymPerNode << endl;
  os << indent << "NumberOfTensorsSymmPerNode: " << this->NumberOfTensorsSymmPerNode << endl;
  os << indent << "NumberOfScalarsPerMeasuredNode: " << this->NumberOfScalarsPerMeasuredNode
     << endl;
  os << indent << "NumberOfVectorsPerMeasuredNode: " << this->NumberOfVectorsPerMeasuredNode
     << endl;
  os << indent << "NumberOfScalarsPerNode: " << this->NumberOfScalarsPerNode << endl;
  os << indent << "NumberOfVectorsPerNode: " << this->NumberOfVectorsPerNode << endl;
  os << indent << "TimeValue: " << this->TimeValue << endl;
  os << indent << "MinimumTimeValue: " << this->MinimumTimeValue << endl;
  os << indent << "MaximumTimeValue: " << this->MaximumTimeValue << endl;
  os << indent << "TimeSets: " << this->TimeSets << endl;
  os << indent << "ReadAllVariables: " << this->ReadAllVariables << endl;
  os << indent << "ByteOrder: " << this->ByteOrder << endl;
  os << indent << "ParticleCoordinatesByIndex: " << this->ParticleCoordinatesByIndex << endl;
  os << indent << "CellDataArraySelection: " << this->CellDataArraySelection << endl;
  os << indent << "PointDataArraySelection: " << this->PointDataArraySelection << endl;
  os << indent
     << "GeometryFileName: " << (this->GeometryFileName ? this->GeometryFileName : "(none)")
     << endl;
}

//------------------------------------------------------------------------------
char** vtkGenericEnSightReader::CreateStringArray(int numStrings)
{
  char** strings = new char*[numStrings];
  int i;
  for (i = 0; i < numStrings; ++i)
  {
    strings[i] = nullptr;
  }
  return strings;
}

//------------------------------------------------------------------------------
void vtkGenericEnSightReader::DestroyStringArray(int numStrings, char** strings)
{
  for (int i = 0; i < numStrings; ++i)
  {
    delete[] strings[i];
  }
  delete[] strings;
}

//------------------------------------------------------------------------------
void vtkGenericEnSightReader::SetDataArraySelectionSetsFromVariables()
{
  int numPointArrays = (this->NumberOfScalarsPerNode + this->NumberOfVectorsPerNode +
    this->NumberOfTensorsAsymPerNode + this->NumberOfTensorsSymmPerNode +
    this->NumberOfScalarsPerMeasuredNode + this->NumberOfVectorsPerMeasuredNode +
    this->NumberOfComplexScalarsPerNode + this->NumberOfComplexVectorsPerNode);
  int numCellArrays = (this->NumberOfScalarsPerElement + this->NumberOfVectorsPerElement +
    this->NumberOfTensorsAsymPerElement + this->NumberOfTensorsSymmPerElement +
    this->NumberOfComplexScalarsPerElement + this->NumberOfComplexVectorsPerElement);

  char** pointNames = this->CreateStringArray(numPointArrays);
  char** cellNames = this->CreateStringArray(numCellArrays);
  int pointArrayCount = 0;
  int cellArrayCount = 0;

  int i;
  for (i = 0; i < this->NumberOfVariables; ++i)
  {
    switch (this->VariableTypes[i])
    {
      case vtkEnSightReader::SCALAR_PER_NODE:
      case vtkEnSightReader::VECTOR_PER_NODE:
      case vtkEnSightReader::TENSOR_ASYM_PER_NODE:
      case vtkEnSightReader::TENSOR_SYMM_PER_NODE:
      case vtkEnSightReader::SCALAR_PER_MEASURED_NODE:
      case vtkEnSightReader::VECTOR_PER_MEASURED_NODE:
        pointNames[pointArrayCount] = new char[strlen(this->VariableDescriptions[i]) + 1];
        strcpy(pointNames[pointArrayCount], this->VariableDescriptions[i]);
        ++pointArrayCount;
        break;
      case vtkEnSightReader::SCALAR_PER_ELEMENT:
      case vtkEnSightReader::VECTOR_PER_ELEMENT:
      case vtkEnSightReader::TENSOR_ASYM_PER_ELEMENT:
      case vtkEnSightReader::TENSOR_SYMM_PER_ELEMENT:
        cellNames[cellArrayCount] = new char[strlen(this->VariableDescriptions[i]) + 1];
        strcpy(cellNames[cellArrayCount], this->VariableDescriptions[i]);
        ++cellArrayCount;
        break;
    }
  }
  for (i = 0; i < this->NumberOfComplexVariables; ++i)
  {
    switch (this->ComplexVariableTypes[i])
    {
      case vtkEnSightReader::COMPLEX_SCALAR_PER_NODE:
      case vtkEnSightReader::COMPLEX_VECTOR_PER_NODE:
        pointNames[pointArrayCount] = new char[strlen(this->ComplexVariableDescriptions[i]) + 1];
        strcpy(pointNames[pointArrayCount], this->ComplexVariableDescriptions[i]);
        ++pointArrayCount;
        break;
      case vtkEnSightReader::COMPLEX_SCALAR_PER_ELEMENT:
      case vtkEnSightReader::COMPLEX_VECTOR_PER_ELEMENT:
        cellNames[cellArrayCount] = new char[strlen(this->ComplexVariableDescriptions[i]) + 1];
        strcpy(cellNames[cellArrayCount], this->ComplexVariableDescriptions[i]);
        ++cellArrayCount;
        break;
    }
  }

  this->PointDataArraySelection->SetArraysWithDefault(
    pointNames, numPointArrays, this->ReadAllVariables);
  this->CellDataArraySelection->SetArraysWithDefault(
    cellNames, numCellArrays, this->ReadAllVariables);
  this->DestroyStringArray(numPointArrays, pointNames);
  this->DestroyStringArray(numCellArrays, cellNames);
}

//------------------------------------------------------------------------------
void vtkGenericEnSightReader::SetDataArraySelectionSetsFromReader()
{
  this->SelectionModifiedDoNotCallModified = 1;
  this->PointDataArraySelection->CopySelections(this->Reader->GetPointDataArraySelection());
  this->CellDataArraySelection->CopySelections(this->Reader->GetCellDataArraySelection());
  this->SelectionModifiedDoNotCallModified = 0;
}

//------------------------------------------------------------------------------
void vtkGenericEnSightReader::SetReaderDataArraySelectionSetsFromSelf()
{
  // Set the real reader's data array selections from ours.
  this->Reader->GetPointDataArraySelection()->CopySelections(this->PointDataArraySelection);
  this->Reader->GetCellDataArraySelection()->CopySelections(this->CellDataArraySelection);
}

//------------------------------------------------------------------------------
void vtkGenericEnSightReader::SelectionModifiedCallback(
  vtkObject*, unsigned long, void* clientdata, void*)
{
  static_cast<vtkGenericEnSightReader*>(clientdata)->SelectionModified();
}

//------------------------------------------------------------------------------
void vtkGenericEnSightReader::SelectionModified()
{
  if (!this->SelectionModifiedDoNotCallModified)
  {
    this->Modified();
  }
}

//------------------------------------------------------------------------------
int vtkGenericEnSightReader::GetNumberOfPointArrays()
{
  return this->PointDataArraySelection->GetNumberOfArrays();
}

//------------------------------------------------------------------------------
const char* vtkGenericEnSightReader::GetPointArrayName(int index)
{
  return this->PointDataArraySelection->GetArrayName(index);
}

//------------------------------------------------------------------------------
int vtkGenericEnSightReader::GetPointArrayStatus(const char* name)
{
  return this->PointDataArraySelection->ArrayIsEnabled(name);
}

//------------------------------------------------------------------------------
void vtkGenericEnSightReader::SetPointArrayStatus(const char* name, int status)
{
  if (status)
  {
    this->PointDataArraySelection->EnableArray(name);
  }
  else
  {
    this->PointDataArraySelection->DisableArray(name);
  }
}

//------------------------------------------------------------------------------
int vtkGenericEnSightReader::GetNumberOfCellArrays()
{
  return this->CellDataArraySelection->GetNumberOfArrays();
}

//------------------------------------------------------------------------------
const char* vtkGenericEnSightReader::GetCellArrayName(int index)
{
  return this->CellDataArraySelection->GetArrayName(index);
}

//------------------------------------------------------------------------------
int vtkGenericEnSightReader::GetCellArrayStatus(const char* name)
{
  return this->CellDataArraySelection->ArrayIsEnabled(name);
}

//------------------------------------------------------------------------------
void vtkGenericEnSightReader::SetCellArrayStatus(const char* name, int status)
{
  if (status)
  {
    this->CellDataArraySelection->EnableArray(name);
  }
  else
  {
    this->CellDataArraySelection->DisableArray(name);
  }
}

//------------------------------------------------------------------------------
int vtkGenericEnSightReader::InsertNewPartId(int partId)
{
  int lastId = static_cast<int>(this->TranslationTable->PartIdMap.size());
  this->TranslationTable->PartIdMap.insert(std::map<int, int>::value_type(partId, lastId));
  lastId = this->TranslationTable->PartIdMap[partId];
  // assert( lastId == this->PartIdTranslationTable[partId] );
  return lastId;
}

//------------------------------------------------------------------------------
int vtkGenericEnSightReader::FillOutputPortInformation(int vtkNotUsed(port), vtkInformation* info)
{
  info->Set(vtkDataObject::DATA_TYPE_NAME(), "vtkMultiBlockDataSet");
  return 1;
}
VTK_ABI_NAMESPACE_END
