// Constructors
/// <summary>
/// DataTrack (abstract)
/// </summary>
/// <param name="fileStream">The iso file stream</param>
/// <param name="trackNumber">The track number</param>
/// <param name="system">File system used for this data track</param>
/// <param name="mode">The sector mode of the track</param>
internal DataTrack(FileStream fileStream, int trackNumber, DiskFileSystem system, DataTrackMode mode)
: base(fileStream, trackNumber, TrackType.DATA)
{
_system = system;
_mode = mode;
_sectorSize = mode == DataTrackMode.RAW ? 2048 : 2352;
_isXa = false;
_pregapSize = 150;
switch (_mode)
{
case DataTrackMode.MODE1:
_defaultSectorMode = SectorMode.MODE1;
break;
case DataTrackMode.MODE2:
_defaultSectorMode = SectorMode.MODE2;
break;
case DataTrackMode.MODE2_XA:
_defaultSectorMode = SectorMode.XA_FORM1;
_isXa = true;
break;
case DataTrackMode.RAW:
default:
_defaultSectorMode = SectorMode.RAW;
break;
}
}
/// <summary>
/// Add a data track
/// </summary>
/// <param name="mode">The sector mode of the track</param>
/// <returns></returns>
public DataTrackWriter CreateDataTrack(DataTrackMode mode)
{
if (_hasDataTrack)
{
throw new FrameworkException("Error while adding track : only Mixed Mode multi tracks disks are supported, it must contains only one DATA track");
}
var dataTrack = new DataTrackWriter(_stream, TracksCount + 1, _system, mode);
_tracks.Add(dataTrack);
_hasDataTrack = true;
return(dataTrack);
}
/// <summary>
/// DiskReader (single data track)
/// </summary>
/// <param name="fileUrl">Path to the ISO/BIN/IMG file to read</param>
/// <param name="system">File system used for the data track</param>
/// <param name="mode">The sector mode of the track</param>
/// <param name="readDescriptors">Read descriptors immediately</param>
/// <param name="buildIndex">Build the index cache immediately</param>
private DiskReader(string fileUrl, DiskFileSystem system, DataTrackMode mode, bool readDescriptors = true, bool buildIndex = true)
: base(system)
{
try
{
_file = new FileInfo(fileUrl);
_fileStream = new FileStream(_file.FullName, FileMode.Open, FileAccess.Read, FileShare.Read);
_stream = new CBinaryReader(_fileStream);
_fileOpen = true;
_stream.Position = 0;
_tracks.Add(new DataTrackReader(_stream, 1, system, mode, readDescriptors, buildIndex));
}
catch (FrameworkException ex)
{
throw ex;
}
catch (Exception)
{
throw new FrameworkException("Error while reading ISO : Unable to open the ISO File");
}
}
// Constructors
/// <summary>
/// DataTrackWriter
/// </summary>
/// <param name="stream">The stream of iso</param>
/// <param name="trackNumber">The track number</param>
/// <param name="system">File system used for this data track</param>
/// <param name="mode">The sector mode of the track</param>
internal DataTrackWriter(CBinaryWriter stream, int trackNumber, DiskFileSystem system, DataTrackMode mode)
: base((FileStream)stream.BaseStream, trackNumber, system, mode)
{
_stream = stream;
_prepared = false;
_finalized = false;
_appendVersionToFileName = true;
try
{
// Allocation for system area
WriteEmptySectors(16);
}
catch (FrameworkException ex)
{
throw ex;
}
catch (Exception)
{
throw new FrameworkException("Error while while writing data track : unable to write the data track");
}
}
/// <summary>
/// Initialize a new single data track DiskReader
/// </summary>
/// <param name="fileUrl">Path to the ISO/BIN/IMG file to read</param>
/// <param name="system">File system used for the track</param>
/// <param name="mode">The sector mode of the track</param>
/// <param name="readDescriptors">Read descriptors immediately</param>
/// <param name="buildIndex">Build the index cache immediately</param>
public static DiskReader InitFromIso(string fileUrl, DiskFileSystem system, DataTrackMode mode, bool readDescriptors = true, bool buildIndex = true)
{
return(new DiskReader(fileUrl, system, mode, readDescriptors, buildIndex));
}
// Constructors
/// <summary>
/// DataTrackReader
/// </summary>
/// <param name="stream">The stream of iso</param>
/// <param name="trackNumber">The track number</param>
/// <param name="system">File system used for this data track</param>
/// <param name="mode">The sector mode of the track</param>
/// <param name="readDescriptors">Read descriptors immediately</param>
/// <param name="buildIndex">Build the index cache immediately</param>
internal DataTrackReader(CBinaryReader stream, int trackNumber, DiskFileSystem system, DataTrackMode mode, bool readDescriptors = true, bool buildIndex = true)
: base((FileStream)stream.BaseStream, trackNumber, system, mode)
{
_stream = stream;
_descriptorsRead = false;
_indexBuilt = false;
_entriesOrder = DataTrackEntriesOrder.DEFAULT;
try
{
if (readDescriptors)
{
ReadVolumeDescriptors();
}
if (buildIndex)
{
BuildIndex();
}
SeekSector(0);
}
catch (FrameworkException ex)
{
throw ex;
}
catch (Exception)
{
throw new FrameworkException("Error while reading data track : unable to read the data track");
}
}
