public ISOFileReader(Stream file)
: base(file)
{
if (file.Length < 17 * sectorSize)
{
throw new InvalidDataException("ISO too small to be valid");
}
IsUDF = false;
int i = 15;
int BNT = 0;
var sector = new byte[sectorSize];
do
{
string type;
if (!ReadSector(sector, 0, ++i) || !VolumeDesciptor.isValid(sector, out type))
{
break;
}
Debug.WriteLine("Volume Structure Descriptor type: " + type);
if (pvd == null && type == "CD001" && sector[0] == 1)
{
pvdSector = i;
pvd = new PrimaryVolumeDescriptor(sector, file);
}
else if (BNT < 3)
{
if (BNT == 0 && type == "BEA01")
{
++BNT;
BEASector = i;
Debug.WriteLine("Found UDF descriptors starting at sector " + i);
}
else if (BNT == 1 && (type == "NSR02" || type == "NSR03"))
{
IsUDF = true;
NSRSector.Add(TEASector = i);
}
else if (BNT == 1 && type == "TEA01")
{
++BNT;
TEASector = i;
Debug.WriteLine("Found UDF descriptors ending at sector " + i);
}
}
} while (true);
if (pvd == null)
{
throw new InvalidDataException("Failed to find root directory on ISO");
}
Debug.WriteLine("Successfully opened ISO image");
}
public virtual void Dispose(bool disposing)
{
if (file != null)
{
file.Dispose();
file = null;
}
if (disposing)
{
if (pvd != null)
{
pvd = null;
}
}
}
