internal static DirectoryEntry Parse(BinaryReader reader)
{
byte[] nameValue = reader.ReadBytes(64);
ushort nameLength = reader.ReadUInt16();
string name = null;
if (nameLength > 1)
{
name = System.Text.Encoding.Unicode.GetString(nameValue, 0, nameLength - 2);
}
byte typeValue = reader.ReadByte();
DirectoryEntryType type = EnumUtil.ParseDirectoryEntryType(typeValue);
byte colorValue = reader.ReadByte();
Color color = EnumUtil.ParseColor(colorValue);
uint leftSiblingSid = reader.ReadUInt32();
uint rightSiblingSid = reader.ReadUInt32();
uint childSid = reader.ReadUInt32();
byte[] classId = reader.ReadBytes(16);
uint userFlags = reader.ReadUInt32();
uint createdTimeLow = reader.ReadUInt32();
long createdTimeHigh = reader.ReadUInt32();
DateTime createdTime = new DateTime();
if (createdTimeHigh > 0)
{
long ticks = createdTimeLow + (createdTimeHigh << 32);
DateTime year1601 = new DateTime(1601, 1, 1);
try
{
createdTime = year1601.AddTicks(ticks).ToLocalTime();
}
catch (Exception) //ignore wrong dates
{
}
}
uint lastModifiedTimeLow = reader.ReadUInt32();
long lastModifiedTimeHigh = reader.ReadUInt32();
DateTime lastModifiedTime = new DateTime();
if (lastModifiedTimeHigh > 0)
{
long ticks = lastModifiedTimeLow + (lastModifiedTimeHigh << 32);
DateTime year1601 = new DateTime(1601, 1, 1);
try
{
lastModifiedTime = year1601.AddTicks(ticks).ToLocalTime();
}
catch (Exception) //ignore wrong dates
{
}
}
uint startSector = reader.ReadUInt32();
uint size = reader.ReadUInt32();
if (type == DirectoryEntryType.Root)
{
RootDirectoryEntry entry = new RootDirectoryEntry();
entry.type = DirectoryEntryType.Root;
entry.name = name;
entry.color = color;
entry.leftSiblingSid = leftSiblingSid;
entry.rightSiblingSid = rightSiblingSid;
entry.childSid = childSid;
entry.classId = classId;
entry.userFlags = userFlags;
entry.createdTime = createdTime;
entry.lastModifiedTime = lastModifiedTime;
entry.startSector = startSector;
entry.size = size;
return(entry);
}
else if (type == DirectoryEntryType.Stream)
{
Stream entry = new Stream();
entry.type = DirectoryEntryType.Stream;
entry.name = name;
entry.color = color;
entry.leftSiblingSid = leftSiblingSid;
entry.rightSiblingSid = rightSiblingSid;
entry.childSid = childSid;
entry.classId = classId;
entry.userFlags = userFlags;
entry.createdTime = createdTime;
entry.lastModifiedTime = lastModifiedTime;
entry.startSector = startSector;
entry.size = size;
return(entry);
}
else if (type == DirectoryEntryType.Storage)
{
Storage entry = new Storage();
entry.type = DirectoryEntryType.Storage;
entry.name = name;
entry.color = color;
entry.leftSiblingSid = leftSiblingSid;
entry.rightSiblingSid = rightSiblingSid;
entry.childSid = childSid;
entry.classId = classId;
entry.userFlags = userFlags;
entry.createdTime = createdTime;
entry.lastModifiedTime = lastModifiedTime;
entry.startSector = startSector;
entry.size = size;
return(entry);
}
else
{
Storage entry = new Storage();
entry.type = DirectoryEntryType.Invalid;
entry.name = name;
entry.color = color;
entry.leftSiblingSid = leftSiblingSid;
entry.rightSiblingSid = rightSiblingSid;
entry.childSid = childSid;
entry.classId = classId;
entry.userFlags = userFlags;
entry.createdTime = createdTime;
entry.lastModifiedTime = lastModifiedTime;
entry.startSector = startSector;
entry.size = size;
return(entry);
}
}
private void OpenImplementation(System.IO.Stream stream)
{
if (stream.Length < 512)
{
throw new InvalidFileFormatException("Invalid file format.");
}
BinaryReader reader = new BinaryReader(stream, System.Text.Encoding.Unicode);
reader.BaseStream.Position = 0;
header = new Header(reader);
uint[] difat = ParseDifat(reader);
uint[] fat = ParseFat(reader, difat);
uint[] miniFat = null;
if (header.FirstMiniFatSector != 0xFFFFFFFE)
{
miniFat = ParseMiniFat(reader, fat);
}
IList <uint> directoryChain = new List <uint>();
uint directorySector = header.FirstDirectorySector;
directoryChain.Add(directorySector);
while (true)
{
directorySector = fat[directorySector];
if (directorySector != 0xFFFFFFFE)
{
directoryChain.Add(directorySector);
}
else
{
break;
}
}
MemoryStream directoryMemoryStream = new MemoryStream();
using (directoryMemoryStream)
{
BinaryReader directoryReader = new BinaryReader(directoryMemoryStream, System.Text.Encoding.Unicode);
for (int i = 0; i < directoryChain.Count; i++)
{
uint currentDirectoryChain = directoryChain[i];
reader.BaseStream.Position = currentDirectoryChain * header.SectorSize + header.SectorSize;
byte[] currentSector = reader.ReadBytes(header.SectorSize);
directoryMemoryStream.Write(currentSector, 0, currentSector.Length);
}
directoryReader.BaseStream.Position = 0;
root = (RootDirectoryEntry)DirectoryEntry.Parse(directoryReader);
IDictionary <uint, DirectoryEntry> directoryEntries = new Dictionary <uint, DirectoryEntry>();
//read directory entries
////////////////////////////////////////////////
directoryEntries.Add(0, root);
if (root.childSid != 0xFFFFFFFF)
{
directoryReader.BaseStream.Position = root.childSid * 128;
DirectoryEntry newEntry = DirectoryEntry.Parse(directoryReader);
directoryEntries.Add(root.childSid, newEntry);
root.directoryEntries.Add(newEntry);
newEntry.parent = root;
Stack <DirectoryEntry> leftStack = new Stack <DirectoryEntry>();
Stack <DirectoryEntry> rightStack = new Stack <DirectoryEntry>();
Stack <DirectoryEntry> childStack = new Stack <DirectoryEntry>();
leftStack.Push(newEntry);
rightStack.Push(newEntry);
childStack.Push(newEntry);
while (leftStack.Count > 0 || rightStack.Count > 0 || childStack.Count > 0)
{
if (leftStack.Count > 0)
{
DirectoryEntry currentEntry = (DirectoryEntry)leftStack.Pop();
if (currentEntry.leftSiblingSid != 0xFFFFFFFF && !directoryEntries.ContainsKey(currentEntry.leftSiblingSid))
{
directoryReader.BaseStream.Position = currentEntry.leftSiblingSid * 128;
newEntry = DirectoryEntry.Parse(directoryReader);
directoryEntries.Add(currentEntry.leftSiblingSid, newEntry);
currentEntry.parent.directoryEntries.Add(newEntry);
newEntry.parent = currentEntry.parent;
leftStack.Push(newEntry);
rightStack.Push(newEntry);
childStack.Push(newEntry);
continue;
}
}
if (rightStack.Count > 0)
{
DirectoryEntry currentEntry = (DirectoryEntry)rightStack.Pop();
if (currentEntry.rightSiblingSid != 0xFFFFFFFF && !directoryEntries.ContainsKey(currentEntry.rightSiblingSid))
{
directoryReader.BaseStream.Position = currentEntry.rightSiblingSid * 128;
newEntry = DirectoryEntry.Parse(directoryReader);
directoryEntries.Add(currentEntry.rightSiblingSid, newEntry);
currentEntry.parent.directoryEntries.Add(newEntry);
newEntry.parent = currentEntry.parent;
leftStack.Push(newEntry);
rightStack.Push(newEntry);
childStack.Push(newEntry);
continue;
}
}
if (childStack.Count > 0)
{
DirectoryEntry currentEntry = (DirectoryEntry)childStack.Pop();
if (currentEntry.childSid != 0xFFFFFFFF && !directoryEntries.ContainsKey(currentEntry.childSid))
{
directoryReader.BaseStream.Position = currentEntry.childSid * 128;
newEntry = DirectoryEntry.Parse(directoryReader);
directoryEntries.Add(currentEntry.childSid, newEntry);
currentEntry.directoryEntries.Add(newEntry);
newEntry.parent = currentEntry;
leftStack.Push(newEntry);
rightStack.Push(newEntry);
childStack.Push(newEntry);
}
}
}
}
////////////////////////////////////////////////
IList <DirectoryEntry> directoryEntriesList = new List <DirectoryEntry>();
foreach (DirectoryEntry entry in directoryEntries.Values)
{
if (entry == root)
{
directoryEntriesList.Insert(0, entry);
}
else
{
directoryEntriesList.Add(entry);
}
}
MemoryStream miniStream = new MemoryStream();
using (miniStream)
{
BinaryReader miniStreamReader = new BinaryReader(miniStream);
for (int i = 0; i < directoryEntriesList.Count; i++)
{
DirectoryEntry entry = directoryEntriesList[i];
if (entry.type != DirectoryEntryType.Storage)
{
if (entry.type != DirectoryEntryType.Root && entry.Size > 0 && entry.Size < header.MiniStreamMaxSize)
{
IList <uint> streamChain = new List <uint>();
uint streamSector = entry.startSector;
streamChain.Add(streamSector);
while (true)
{
streamSector = miniFat[streamSector];
if (streamSector != 0xFFFFFFFC && streamSector != 0xFFFFFFFD && streamSector != 0xFFFFFFFE && streamSector != 0xFFFFFFFF && streamSector != miniFat[streamSector])
{
streamChain.Add(streamSector);
}
else
{
break;
}
}
MemoryStream entryBufferMemoryStream = new MemoryStream();
using (entryBufferMemoryStream)
{
for (int j = 0; j < streamChain.Count; j++)
{
uint currentStreamChain = streamChain[j];
miniStreamReader.BaseStream.Position = currentStreamChain * 64;
byte[] currentSector = miniStreamReader.ReadBytes(64);
entryBufferMemoryStream.Write(currentSector, 0, currentSector.Length);
}
entry.buffer = new byte[entry.size];
if (entryBufferMemoryStream.Length < entry.buffer.Length)
{
entry.buffer = new byte[entryBufferMemoryStream.Length];
}
System.Array.Copy(entryBufferMemoryStream.ToArray(), 0, entry.buffer, 0, entry.buffer.Length);
}
}
else if (entry.Size > 0)
{
IList <uint> streamChain = new List <uint>();
uint streamSector = entry.startSector;
streamChain.Add(streamSector);
while (true)
{
streamSector = fat[streamSector];
if (streamSector != 0xFFFFFFFC && streamSector != 0xFFFFFFFD && streamSector != 0xFFFFFFFE && streamSector != 0xFFFFFFFF && streamSector != fat[streamSector])
{
streamChain.Add(streamSector);
}
else
{
break;
}
}
MemoryStream entryBufferMemoryStream = new MemoryStream();
using (entryBufferMemoryStream)
{
for (int j = 0; j < streamChain.Count; j++)
{
uint currentStreamChain = streamChain[j];
reader.BaseStream.Position = currentStreamChain * header.SectorSize + header.SectorSize;
byte[] currentSector = reader.ReadBytes(header.SectorSize);
entryBufferMemoryStream.Write(currentSector, 0, currentSector.Length);
}
entry.buffer = new byte[entry.Size];
if (entryBufferMemoryStream.Length < entry.buffer.Length)
{
entry.buffer = new byte[entryBufferMemoryStream.Length];
}
System.Array.Copy(entryBufferMemoryStream.ToArray(), 0, entry.buffer, 0, entry.buffer.Length);
}
if (entry == root)
{
if (root.buffer != null)
{
miniStream.Write(root.buffer, 0, root.buffer.Length);
}
}
}
}
}
}
}
}
