private void ReadVolumeDescriptor(VolumeDescriptor descriptor)
{
descriptor.VolFlags = ReadByte();
ReadBytes(descriptor.SystemIdentifier, descriptor.SystemIdentifier.Length);
ReadBytes(descriptor.VolumeIdentifier, descriptor.VolumeIdentifier.Length);
SkeepZeros(8);
descriptor.VolumeSpaceSize = ReadInt64();
ReadBytes(descriptor.EscapeSequence, descriptor.EscapeSequence.Length);
descriptor.VolumeSetSize = ReadInt32();
descriptor.VolumeSequenceNumber = ReadInt32();
descriptor.LogicalBlockSize = ReadInt32();
descriptor.PathTableSize = ReadInt64();
descriptor.LPathTableLocation = ReadInt32Le();
descriptor.LOptionalPathTableLocation = ReadInt32Le();
descriptor.MPathTableLocation = ReadInt32Be();
descriptor.MOptionalPathTableLocation = ReadInt32Be();
ReadDirRecord(descriptor.RootDirRecord);
ReadBytes(descriptor.VolumeSetIdentifier, descriptor.VolumeSetIdentifier.Length);
ReadBytes(descriptor.PublisherIdentifier, descriptor.PublisherIdentifier.Length);
ReadBytes(descriptor.DataPreparerIdentifier, descriptor.DataPreparerIdentifier.Length);
ReadBytes(descriptor.ApplicationIdentifier, descriptor.ApplicationIdentifier.Length);
ReadBytes(descriptor.CopyrightFileIdentifier, descriptor.CopyrightFileIdentifier.Length);
ReadBytes(descriptor.AbstractFileIdentifier, descriptor.AbstractFileIdentifier.Length);
ReadBytes(descriptor.BibFileIdentifier, descriptor.BibFileIdentifier.Length);
ReadDateTime(descriptor.CTime);
ReadDateTime(descriptor.MTime);
ReadDateTime(descriptor.ExpirationTime);
ReadDateTime(descriptor.EffectiveTime);
descriptor.FileStructureVersion = ReadByte();
SkeepZeros(1);
ReadBytes(descriptor.ApplicationUse, descriptor.ApplicationUse.Length);
SkeepZeros(653);
}
public override bool Open()
{
base.Open();
StartPosition = (ImageReader.PRIMARY_VOLUME_SECTOR * CurrentBlockSize);
dataBuffer = new byte[CurrentBlockSize];
BaseStream.Seek(StartPosition, SeekOrigin.Begin);
bool primVolDescDefined = false;
dataBufferPosition = 0;
_volumeDescriptor.Add(new VolumeDescriptor());
bool exit = false;
while (!exit)
{
byte[] sig = new byte[7];
ReadBytes(sig, 7);
byte ver = sig[6];
if (!CheckSignature(1, SignatureCD001, sig))
return false;
_version = ver;
if (Version > 2) // version = 2 for ISO 9660:1999?
throw new InvalidDataException();
switch ((VolumeDescriptorType)sig[0])
{
case VolumeDescriptorType.BootRecord:
{
break;
}
case VolumeDescriptorType.PrimaryVolume:
{
if (primVolDescDefined)
return false;
primVolDescDefined = true;
VolumeDescriptor volDesc = _volumeDescriptor[0];
ReadVolumeDescriptor(volDesc);
for (int i = 0; i < volDesc.EscapeSequence.Length; i++)
{
// some burners write "Joliet" Escape Sequence to primary volume reset them to zero
volDesc.EscapeSequence[i] = 0;
}
break;
}
case VolumeDescriptorType.SupplementaryVolume:
{
VolumeDescriptor sd = new VolumeDescriptor();
ReadVolumeDescriptor(sd);
_volumeDescriptor.Add(sd);
break;
}
case VolumeDescriptorType.Terminator:
default:
exit = true;
break;
}
}
if (!primVolDescDefined)
return false;
MainVolDescIndex = 0;
if (!this.NoJoliet)
{
for (int i = _volumeDescriptor.Count - 1; i >= 0; i--)
{
if (_volumeDescriptor[i].IsJoliet)
{
MainVolDescIndex = i;
break;
}
}
}
if (_volumeDescriptor[MainVolDescIndex].LogicalBlockSize != ImageReader.SECTOR_SIZE)
return false;
_rootDirectory = _volumeDescriptor[MainVolDescIndex].RootDirRecord;
IsoRecord root = _rootDirectory as IsoRecord;
root.IsJoliet = IsJoliet;
ReadDir(root, 0);
_volumename = _volumeDescriptor[MainVolDescIndex].GetString();
return true;
}
