public bool Identify(IFilter imageFilter)
{
Stream stream = imageFilter.GetDataForkStream();
stream.Seek(0, SeekOrigin.Begin);
if (stream.Length < 512)
{
return(false);
}
byte[] qHdrB = new byte[64];
stream.Read(qHdrB, 0, 64);
qHdr = new QedHeader();
IntPtr headerPtr = Marshal.AllocHGlobal(64);
Marshal.Copy(qHdrB, 0, headerPtr, 64);
qHdr = (QedHeader)Marshal.PtrToStructure(headerPtr, typeof(QedHeader));
Marshal.FreeHGlobal(headerPtr);
return(qHdr.magic == QED_MAGIC);
}
public bool Open(IFilter imageFilter)
{
Stream stream = imageFilter.GetDataForkStream();
stream.Seek(0, SeekOrigin.Begin);
if (stream.Length < 512)
{
return(false);
}
byte[] qHdrB = new byte[64];
stream.Read(qHdrB, 0, 64);
qHdr = new QedHeader();
IntPtr headerPtr = Marshal.AllocHGlobal(64);
Marshal.Copy(qHdrB, 0, headerPtr, 64);
qHdr = (QedHeader)Marshal.PtrToStructure(headerPtr, typeof(QedHeader));
Marshal.FreeHGlobal(headerPtr);
DicConsole.DebugWriteLine("QED plugin", "qHdr.magic = 0x{0:X8}", qHdr.magic);
DicConsole.DebugWriteLine("QED plugin", "qHdr.cluster_size = {0}", qHdr.cluster_size);
DicConsole.DebugWriteLine("QED plugin", "qHdr.table_size = {0}", qHdr.table_size);
DicConsole.DebugWriteLine("QED plugin", "qHdr.header_size = {0}", qHdr.header_size);
DicConsole.DebugWriteLine("QED plugin", "qHdr.features = {0}", qHdr.features);
DicConsole.DebugWriteLine("QED plugin", "qHdr.compat_features = {0}", qHdr.compat_features);
DicConsole.DebugWriteLine("QED plugin", "qHdr.autoclear_features = {0}", qHdr.autoclear_features);
DicConsole.DebugWriteLine("QED plugin", "qHdr.l1_table_offset = {0}", qHdr.l1_table_offset);
DicConsole.DebugWriteLine("QED plugin", "qHdr.image_size = {0}", qHdr.image_size);
DicConsole.DebugWriteLine("QED plugin", "qHdr.backing_file_offset = {0}", qHdr.backing_file_offset);
DicConsole.DebugWriteLine("QED plugin", "qHdr.backing_file_size = {0}", qHdr.backing_file_size);
if (qHdr.image_size <= 1)
{
throw new ArgumentOutOfRangeException(nameof(qHdr.image_size), "Image size is too small");
}
if (!IsPowerOfTwo(qHdr.cluster_size))
{
throw new ArgumentOutOfRangeException(nameof(qHdr.cluster_size), "Cluster size must be a power of 2");
}
if (qHdr.cluster_size < 4096 || qHdr.cluster_size > 67108864)
{
throw new ArgumentOutOfRangeException(nameof(qHdr.cluster_size),
"Cluster size must be between 4 Kbytes and 64 Mbytes");
}
if (!IsPowerOfTwo(qHdr.table_size))
{
throw new ArgumentOutOfRangeException(nameof(qHdr.table_size), "Table size must be a power of 2");
}
if (qHdr.table_size < 1 || qHdr.table_size > 16)
{
throw new ArgumentOutOfRangeException(nameof(qHdr.table_size),
"Table size must be between 1 and 16 clusters");
}
if ((qHdr.features & QED_FEATURE_MASK) > 0)
{
throw new ArgumentOutOfRangeException(nameof(qHdr.features),
$"Image uses unknown incompatible features {qHdr.features & QED_FEATURE_MASK:X}");
}
if ((qHdr.features & QED_FEATURE_BACKING_FILE) == QED_FEATURE_BACKING_FILE)
{
throw new NotImplementedException("Differencing images not yet supported");
}
clusterSectors = qHdr.cluster_size / 512;
tableSize = qHdr.cluster_size * qHdr.table_size / 8;
DicConsole.DebugWriteLine("QED plugin", "qHdr.clusterSectors = {0}", clusterSectors);
DicConsole.DebugWriteLine("QED plugin", "qHdr.tableSize = {0}", tableSize);
byte[] l1TableB = new byte[tableSize * 8];
stream.Seek((long)qHdr.l1_table_offset, SeekOrigin.Begin);
stream.Read(l1TableB, 0, (int)tableSize * 8);
l1Table = new ulong[tableSize];
DicConsole.DebugWriteLine("QED plugin", "Reading L1 table");
for (long i = 0; i < l1Table.LongLength; i++)
{
l1Table[i] = BitConverter.ToUInt64(l1TableB, (int)(i * 8));
}
l1Mask = 0;
int c = 0;
clusterBits = Ctz32(qHdr.cluster_size);
l2Mask = (tableSize - 1) << clusterBits;
l1Shift = clusterBits + Ctz32(tableSize);
for (int i = 0; i < 64; i++)
{
l1Mask <<= 1;
if (c >= 64 - l1Shift)
{
continue;
}
l1Mask += 1;
c++;
}
sectorMask = 0;
for (int i = 0; i < clusterBits; i++)
{
sectorMask = (sectorMask << 1) + 1;
}
DicConsole.DebugWriteLine("QED plugin", "qHdr.clusterBits = {0}", clusterBits);
DicConsole.DebugWriteLine("QED plugin", "qHdr.l1Mask = {0:X}", l1Mask);
DicConsole.DebugWriteLine("QED plugin", "qHdr.l1Shift = {0}", l1Shift);
DicConsole.DebugWriteLine("QED plugin", "qHdr.l2Mask = {0:X}", l2Mask);
DicConsole.DebugWriteLine("QED plugin", "qHdr.sectorMask = {0:X}", sectorMask);
maxL2TableCache = MAX_CACHE_SIZE / tableSize;
maxClusterCache = MAX_CACHE_SIZE / qHdr.cluster_size;
imageStream = stream;
sectorCache = new Dictionary <ulong, byte[]>();
l2TableCache = new Dictionary <ulong, ulong[]>();
clusterCache = new Dictionary <ulong, byte[]>();
imageInfo.CreationTime = imageFilter.GetCreationTime();
imageInfo.LastModificationTime = imageFilter.GetLastWriteTime();
imageInfo.MediaTitle = Path.GetFileNameWithoutExtension(imageFilter.GetFilename());
imageInfo.Sectors = qHdr.image_size / 512;
imageInfo.SectorSize = 512;
imageInfo.XmlMediaType = XmlMediaType.BlockMedia;
imageInfo.MediaType = MediaType.GENERIC_HDD;
imageInfo.ImageSize = qHdr.image_size;
imageInfo.Cylinders = (uint)(imageInfo.Sectors / 16 / 63);
imageInfo.Heads = 16;
imageInfo.SectorsPerTrack = 63;
return(true);
}
public bool Create(string path, MediaType mediaType, Dictionary <string, string> options, ulong sectors,
uint sectorSize)
{
if (sectorSize != 512)
{
ErrorMessage = "Unsupported sector size";
return(false);
}
if (!SupportedMediaTypes.Contains(mediaType))
{
ErrorMessage = $"Unsupported media format {mediaType}";
return(false);
}
// TODO: Correct this calculation
if ((sectors * sectorSize) / DEFAULT_CLUSTER_SIZE > uint.MaxValue)
{
ErrorMessage = "Too many sectors for selected cluster size";
return(false);
}
_imageInfo = new ImageInfo
{
MediaType = mediaType,
SectorSize = sectorSize,
Sectors = sectors
};
try
{
_writingStream = new FileStream(path, FileMode.OpenOrCreate, FileAccess.ReadWrite, FileShare.None);
}
catch (IOException e)
{
ErrorMessage = $"Could not create new image file, exception {e.Message}";
return(false);
}
_qHdr = new QedHeader
{
magic = QED_MAGIC,
cluster_size = DEFAULT_CLUSTER_SIZE,
table_size = DEFAULT_TABLE_SIZE,
header_size = 1,
l1_table_offset = DEFAULT_CLUSTER_SIZE,
image_size = sectors * sectorSize
};
_clusterSectors = _qHdr.cluster_size / 512;
_tableSize = (_qHdr.cluster_size * _qHdr.table_size) / 8;
_l1Table = new ulong[_tableSize];
_l1Mask = 0;
int c = 0;
_clusterBits = Ctz32(_qHdr.cluster_size);
_l2Mask = (_tableSize - 1) << _clusterBits;
_l1Shift = _clusterBits + Ctz32(_tableSize);
for (int i = 0; i < 64; i++)
{
_l1Mask <<= 1;
if (c >= 64 - _l1Shift)
{
continue;
}
_l1Mask += 1;
c++;
}
_sectorMask = 0;
for (int i = 0; i < _clusterBits; i++)
{
_sectorMask = (_sectorMask << 1) + 1;
}
byte[] empty = new byte[_qHdr.l1_table_offset + (_tableSize * 8)];
_writingStream.Write(empty, 0, empty.Length);
IsWriting = true;
ErrorMessage = null;
return(true);
}
