private void InternalRead(BinaryReader reader)
{
long posStart = reader.GetPosition();
byte length = reader.ReadByte();
byte extLength = reader.ReadByte();
_LBA = reader.ReadInt32();
reader.Seek(0x04, SeekOrigin.Current); // LBA_BE
_size = reader.ReadInt32();
reader.Seek(0x04 + 0x07, SeekOrigin.Current); // size_BE + datetime
_flags = reader.ReadByte();
reader.Seek(0x06, SeekOrigin.Current); // unit size + interleave gap + volume seq number
byte nameLength = reader.ReadByte();
byte[] nameBytes = reader.ReadBytes(nameLength);
if (nameBytes.Length == 1)
{
if (nameBytes[0] == 0)
_name = ".";
else if (nameBytes[0] == 1)
_name = "..";
}
else
{
_name = Encoding.ASCII.GetString(nameBytes).Split(';')[0];
}
bool isDirectory = (_flags & (int)RecordFlags.DirectoryRecord) == (int)RecordFlags.DirectoryRecord;
bool isNotParentOrGrandparentDirectory = nameLength != 1 || _parent == null;
if (isDirectory && isNotParentOrGrandparentDirectory)
{
reader.Seek(CVMFile.CVM_HEADER_SIZE + ((long)_LBA * CVMFile.ISO_BLOCKSIZE), SeekOrigin.Begin);
_subEntries = new List<ISODirectoryRecord>();
// Set the initial sector start position
long posSubEntriesSectorStart = reader.BaseStream.Position;
long posSubEntriesDataEnd = posSubEntriesSectorStart + _size;
while (reader.BaseStream.Position < posSubEntriesDataEnd)
{
ISODirectoryRecord record = new ISODirectoryRecord(reader, this);
_subEntries.Add(record);
// Skip padding
byte test = reader.ReadByte();
while (test == 0 && reader.BaseStream.Position < posSubEntriesDataEnd)
{
test = reader.ReadByte();
}
// Break out of the loop if we've read to or past the end position
if (reader.BaseStream.Position >= posSubEntriesDataEnd)
{
break;
}
// We've found a non-zero byte, seek back
reader.BaseStream.Position -= 1;
}
}
reader.Seek(posStart + length + extLength, SeekOrigin.Begin);
}
internal ISODirectoryRecord(BinaryReader reader, ISODirectoryRecord parent)
{
_parent = parent;
InternalRead(reader);
}
