Merge pull request #277 from kdl222/m0703

#include "SpecialPixel.h"

#include "FileName.h"

#include "Pvl.h"

#include <QMap>

using namespace std;

using namespace Isis;

  // Maps the bit type of the file to the number of bytes of that type

  // Taken directly from a given python program that reads in ddd data

  map<int, int> dataTypes = {

    {1450901768, 1},

    {1450902032, 2},

    {1450902288, 2},

    {1450902560, 4},

    {1450902816, 4},

    {1450903072, 4},

    {1450903360, 8},

    {8, 1},

    {16, 2},

    {48, 2}

  };

  QMap<int, int> dataTypes;

  dataTypes.insert(1450901768, 1);

  dataTypes.insert(1450902032, 2);

  dataTypes.insert(1450902288, 2);

  dataTypes.insert(1450902560, 4);

  dataTypes.insert(1450902816, 4);

  dataTypes.insert(1450903072, 4);

  dataTypes.insert(1450903360, 8);

  dataTypes.insert(8, 1);

  dataTypes.insert(16, 2);

  dataTypes.insert(48, 2);

  // Read bytes 16-19 to get the bit type

  // Map the bit type to the number of bytes of that data type

  int bitType = (int) readBytes.readLong;

  int dataTypeBytes;

  //Old header format has no bit type

  if (bitType == 0) {

    dataTypeBytes = dataTypes.find(totalBandBits) -> second;

  }

  else {

    dataTypeBytes = dataTypes.find(bitType) -> second;

  }

  int nOffset;

  // Check for new header format. Taken from the python program.

  if ( (bitType & 0xfffff000) == 0x567b0000 ) {

    dataTypeBytes = dataTypes.value(bitType);

    // Read bytes 20-23 to get offset

    // New header format may have different offsets

    fin.read(readBytes.readChars, 4);

    readBytes.readFloat = swp.Float(readBytes.readChars);

  int nOffset = (int) readBytes.readLong;

    nOffset = (int) readBytes.readLong;

    if (nOffset < 1024) {

      nOffset = 1024;

    }

  }

  else {

    // Old header format does not have a bit type

    // Old header format's offset is always 1024.

     dataTypeBytes = dataTypes.value(totalBandBits);

     nOffset = 1024;

  }

  fin.close();