public static bool IsCompressed(NDSFile file)
=> file.Name.ToLower().EndsWith("lz.bin");
public VCSChange(SerializationInfo info, StreamingContext context)
{
RollbackPatch = (XDeltaPatch)info.GetValue(nameof(RollbackPatch), typeof(XDeltaPatch));
ParentCommit = (VCSCommit)info.GetValue(nameof(ParentCommit), typeof(VCSCommit));
ParentFile = (NDSFile)info.GetValue(nameof(ParentFile), typeof(NDSFile));
}
public void Initialize()
{
Dictionary <ushort, NDSDirectory> directories = new Dictionary <ushort, NDSDirectory>();
Dictionary <ushort, NDSFile> files = new Dictionary <ushort, NDSFile>();
// The maximum address we can access while reading metaentries.
uint dirEntriesAddrLimit = BitConverter.ToUInt32(RawFNT.Slice(0, sizeof(uint)).GetAsArrayCopy(), startIndex: 0);
// We create a dictionary for children before setting them because folders/files may be out of order
// and parents may not exist before referencing them.
var childrenStructure = new Dictionary <ushort, List <ushort> >();
// Everything before this entry in the FAT is an overlay file.
ushort firstDataFileID = BitConverter.ToUInt16(RawFNT.Slice(sizeof(uint), sizeof(ushort)).GetAsArrayCopy(), startIndex: 0);
// 0xFFFF is just a fictional ID used for convenience.
RootOverlayDirectory = new NDSDirectory(this, 0xFFFF, "overlay");
for (ushort overlayID = 0; overlayID < firstDataFileID; overlayID++)
{
RootOverlayDirectory.ChildrenFiles.Add(new NDSFile(this, overlayID, $"overlay_{overlayID}")
{
Parent = RootOverlayDirectory
});
}
for (int currentRelativeAddress = 0; currentRelativeAddress < dirEntriesAddrLimit; currentRelativeAddress += DirectoryEntrySize)
{
ByteSlice dirEntry = RawFNT.Slice(currentRelativeAddress, DirectoryEntrySize);
// The address of the first named entry inside of this directory.
uint namedEntryAddress = BitConverter.ToUInt32(dirEntry.Slice(0, sizeof(uint)).GetAsArrayCopy(), startIndex: 0);
// The ID of the first file in this directory.
ushort firstFileID = BitConverter.ToUInt16(dirEntry.Slice(sizeof(uint), sizeof(ushort)).GetAsArrayCopy(), startIndex: 0);
// The ID of the parent of this directory. If folder is root, this will not start with 0xF000.
ushort parentDirID = BitConverter.ToUInt16(dirEntry.Slice(sizeof(uint) + sizeof(ushort), sizeof(ushort)).GetAsArrayCopy(), startIndex: 0);
// The ID of the directory that all these files belong to.
ushort containerDirID = (ushort)(currentRelativeAddress / DirectoryEntrySize + EntryDirectoryFlag);
ByteSlice namedEntry = RawFNT.Slice((int)namedEntryAddress, RawFNT.Size);
readNamedEntry(namedEntry, firstFileID);
void readNamedEntry(ByteSlice namedEntry, ushort fileID)
{
if (namedEntry[0] == 0)
{
return;
}
bool isDirectory = (namedEntry[0] & 0b10000000) > 0;
byte nameLength = (byte)(namedEntry[0] & 0b01111111);
string name = Encoding.UTF8.GetString(namedEntry.Slice(1, nameLength).GetAsArrayCopy());
if (isDirectory)
{
ushort entryID = BitConverter.ToUInt16(namedEntry.Slice(1 + nameLength, sizeof(ushort)).GetAsArrayCopy(), startIndex: 0);
namedEntry.SliceEnd = namedEntry.SliceStart + 1 + nameLength + sizeof(ushort);
var directory = new NDSDirectory(this, entryID, name);
directories.Add(entryID, directory);
// If the parent is not a directory, then this entry represents the root directory (/data/)
if ((parentDirID & EntryDirectoryFlag) == 0)
{
RootDataDirectory = directory;
}
else
{
childrenStructure.TryGetValue(containerDirID, out var parent);
if (parent == null)
{
childrenStructure.Add(containerDirID, new List <ushort>()
{
entryID
});
}
else
{
parent.Add(entryID);
}
}
}
else
{
namedEntry.SliceEnd = namedEntry.SliceStart + 1 + nameLength;
var file = new NDSFile(this, fileID, name);
if (files.ContainsKey(fileID))
{
files[fileID] = file;
Console.WriteLine($"[NDSFilesystem.Initialize] The file {fileID} was repeated!");
}
else
{
files.Add(fileID, file);
}
childrenStructure.TryGetValue(containerDirID, out var parent);
if (parent == null)
{
childrenStructure.Add(containerDirID, new List <ushort>()
{
fileID
});
}
else
{
parent.Add(fileID);
}
}
// Read next entry
readNamedEntry(RawFNT.Slice(namedEntry.SliceEnd - RawFNT.SliceStart, RawFNT.Size), (ushort)(fileID + 1));
}
}
foreach (var parentRelations in childrenStructure)
{
directories.TryGetValue(parentRelations.Key, out var parent);
if (parent == null)
{
Console.WriteLine($"[NDSFilesystem.Initialize] Parent 0x{parentRelations.Key:X} does not exist as a directory!! (First child: {files[parentRelations.Value.First()].Name})");
continue;
}
else
{
foreach (var child in parentRelations.Value)
{
if ((child & EntryDirectoryFlag) > 0)
{
parent.ChildrenDirectories.Add(directories[child]);
directories[child].Parent = parent;
}
else
{
parent.ChildrenFiles.Add(files[child]);
files[child].Parent = parent;
}
}
}
}
}
public VCSChange(VCSCommit parentCommit, NDSFile parentFile, XDeltaPatch rollbackPatch)
{
RollbackPatch = rollbackPatch;
ParentCommit = parentCommit;
ParentFile = parentFile;
}
