// Create a new filesystem.
public Filesystem(BinaryReader r, uint fntOff, uint fntSize, uint fatOff, uint fatSize, bool convertFiles, ConversionInfo conversionInfo)
{
// Read a folder.
Folder ReadFolder(ushort id, Folder parent = null, string folderName = "")
{
// Get folder info.
r.BaseStream.Position = fntOff + 8 * id;
Folder ret = new Folder();
ret.Parent = parent;
ret.Id = id;
ret.Name = folderName;
uint off = r.ReadUInt32();
ret.FirstFileId = r.ReadUInt16();
r.ReadUInt16(); // Parent ID. Root folder is total number of folders.
r.BaseStream.Position = fntOff + off;
// Data.
byte control = r.ReadByte();
ushort currId = ret.FirstFileId;
while (control != 0)
{
bool folder = (control & 0x80) != 0;
control &= 0x7F;
string name = new string(r.ReadChars(control));
if (folder)
{
ushort subId = (ushort)(r.ReadUInt16() & 0xFFF);
long bakPos = r.BaseStream.Position;
Folder newFolder = ReadFolder(subId, ret, name);
r.BaseStream.Position = bakPos;
ret.Folders.Add(newFolder);
}
else
{
long bakPos = r.BaseStream.Position;
r.BaseStream.Position = fatOff + currId * 8;
uint startOff = r.ReadUInt32();
uint endOff = r.ReadUInt32();
r.BaseStream.Position = startOff;
byte[] fileData = r.ReadBytes((int)(endOff - startOff));
IFormat newData = null;
if (convertFiles)
{
string filePath = name;
Folder currFolder = ret;
while (currFolder != null)
{
filePath = currFolder.Name + "/" + filePath;
currFolder = currFolder.Parent;
}
if (filePath.StartsWith("/"))
{
filePath = filePath.Substring(1);
}
newData = FormatUtil.DoExtractionConversion(conversionInfo, r, startOff, filePath, fileData);
}
else
{
newData = new GenericFile()
{
Data = fileData
};
}
r.BaseStream.Position = bakPos;
ret.Files.Add(new File()
{
Name = name, Id = currId++, Data = newData
});
}
control = r.ReadByte();
}
// Finish.
return(ret);
}
// Read root.
var root = ReadFolder(0);
Folders = root.Folders;
Files = root.Files;
FirstFileId = root.FirstFileId;
}
// Create a new ROM.
public ROM(string filePath, string conversionPath)
{
// Build system.
if (!conversionPath.Equals(""))
{
Directory.CreateDirectory(conversionPath);
ConversionInfo = new ConversionInfo(conversionPath);
}
// Read the file.
using (Stream s = new FileStream(filePath, FileMode.Open)) {
// Read general data.
BinaryReader r = new BinaryReader(s);
GameTitle = r.ReadFixedLen(0xC);
GameCode = r.ReadFixedLen(0x4);
MakerCode = r.ReadFixedLen(0x2);
UnitCode = (UnitCode)r.ReadByte();
EncryptionSeedSelect = r.ReadByte();
DeviceCapacity = r.ReadByte();
r.ReadBytes(7);
Revision = r.ReadUInt16();
Version = r.ReadByte();
Flags = r.ReadByte();
uint arm9Offset = r.ReadUInt32();
Arm9EntryAddress = r.ReadUInt32();
Arm9LoadAddress = r.ReadUInt32();
uint arm9Size = r.ReadUInt32();
uint arm7Offset = r.ReadUInt32();
Arm7EntryAddress = r.ReadUInt32();
Arm7LoadAddress = r.ReadUInt32();
uint arm7Size = r.ReadUInt32();
uint fntOffset = r.ReadUInt32();
uint fntSize = r.ReadUInt32();
uint fatOffset = r.ReadUInt32();
uint fatSize = r.ReadUInt32();
uint arm9OverlayOffset = r.ReadUInt32();
uint arm9OverlayLength = r.ReadUInt32();
uint arm7OverlayOffset = r.ReadUInt32();
uint arm7OverlayLength = r.ReadUInt32();
NormalCardControlRegisterSettings = r.ReadUInt32();
SecureCardControlRegisterSettings = r.ReadUInt32();
uint iconBannerOffset = r.ReadUInt32();
SecureAreaCRC = r.ReadUInt16();
SecureTransferTimeout = r.ReadUInt16();
Arm9Autoload = r.ReadUInt32();
Arm7Autoload = r.ReadUInt32();
SecureDisable = r.ReadUInt64();
uint romSize = r.ReadUInt32() + 0x88;
HeaderSize = r.ReadUInt32();
// Read logo.
r.BaseStream.Position = 0xC0;
NintendoLogo = r.ReadBytes(0x9C);
r.ReadUInt16(); // Nintendo logo CRC. It is literally just the CRC of the logo.
r.ReadUInt16(); // Header CRC. It is the CRC of everything up to this point (0 to 0x15E).
// Get banner.
r.BaseStream.Position = iconBannerOffset;
ushort bannerVersion = r.ReadUInt16();
r.BaseStream.Position -= 2;
Banner = r.ReadBytes((int)BANNER_LENGTHS[bannerVersion]);
// Code binaries.
r.BaseStream.Position = arm9Offset;
Arm9 = r.ReadBytes((int)arm9Size);
r.BaseStream.Position = arm7Offset;
Arm7 = r.ReadBytes((int)arm7Size);
// Get overlays.
Arm9Overlays = Overlay.LoadOverlays(r, arm9OverlayOffset, arm9OverlayLength);
Arm7Overlays = Overlay.LoadOverlays(r, arm7OverlayOffset, arm7OverlayLength);
for (int i = 0; i < Arm9Overlays.Count; i++)
{
r.BaseStream.Position = fatOffset + Arm9Overlays[i].FileId * 8;
uint fileStart = r.ReadUInt32();
uint fileEnd = r.ReadUInt32();
r.BaseStream.Position = fileStart;
Arm9Overlays[i].Data = r.ReadBytes((int)(fileEnd - fileStart));
}
for (int i = 0; i < Arm7Overlays.Count; i++)
{
r.BaseStream.Position = fatOffset + Arm7Overlays[i].FileId * 8;
uint fileStart = r.ReadUInt32();
uint fileEnd = r.ReadUInt32();
r.BaseStream.Position = fileStart;
Arm7Overlays[i].Data = r.ReadBytes((int)(fileEnd - fileStart));
}
// Read filesystem.
Filesystem = new Filesystem(r, fntOffset, fntSize, fatOffset, fatSize, !conversionPath.Equals(""), ConversionInfo);
// Dispose.
r.Dispose();
}
}
