public static void ReadTOC(UnixFileDescriptor fd, out byte first, out byte last, out MMC.TrackDescriptor[] tracks, bool nativeAddress)
{
{ // Read the TOC header
var req = new TOCHeaderRequest();
if (NativeApi.SendIORequest(fd.Value, IOCTL.CDIOREADTOCHEADER, ref req) != 0)
{
throw new IOException("Failed to retrieve table of contents.", new UnixException());
}
first = req.starting_track;
last = req.ending_track;
}
{
var trackcount = last - first + 2; // first->last plus lead-out
var itemsize = Util.SizeOfStructure <MMC.TrackDescriptor>();
var req = new TOCEntriesRequest {
address_format = CDAddressFormat.CD_LBA_FORMAT,
starting_track = first,
data_len = (ushort)(trackcount * itemsize),
};
req.data = Marshal.AllocHGlobal(new IntPtr(req.data_len));
try {
if (NativeApi.SendIORequest(fd.Value, IOCTL.CDIOREADTOCENTRIES, ref req) != 0)
{
throw new IOException("Failed to retrieve TOC entries.", new UnixException());
}
tracks = new MMC.TrackDescriptor[trackcount];
var walker = req.data;
for (var i = 0; i < trackcount; ++i)
{
tracks[i] = Util.MarshalPointerToStructure <MMC.TrackDescriptor>(walker);
// The FixUp call assumes the address is in network byte order.
if (nativeAddress)
{
tracks[i].Address = IPAddress.HostToNetworkOrder(tracks[i].Address);
}
tracks[i].FixUp(req.address_format == CDAddressFormat.CD_MSF_FORMAT);
walker += itemsize;
}
}
finally {
Marshal.FreeHGlobal(req.data);
}
}
}
private static extern int SendIORequest(int fd, IOCTL command, ref TOCEntriesRequest request);