/// <summary>
/// Write the file system to the stream.
/// </summary>
/// <param name="str">Stream to write to.</param>
public override void Write(DataStream str)
{
// The order is: ARM9 - Overlays9 - ARM7 - Overlays7 - FNT - FAT
this.WriteArm(str, true); // Write ARM9
this.WriteArm(str, false); // Write ARM7
// To get the first ROM file ID
int numOverlays = this.CountOverlays(false) + this.CountOverlays(true);
// Create a new File Name Table...
Fnt fnt = new Fnt();
fnt.Initialize(null, this.root, numOverlays);
// ... and writes it
this.header.FntOffset = (uint)(this.header.HeaderSize + str.Position);
long fntStartOffset = str.Position;
fnt.Write(str);
this.header.FntSize = (uint)(str.Position - fntStartOffset);
str.WritePadding(FileSystem.PaddingByte, FileSystem.PaddingAddress);
// Create a temp dir with every file to be register in the FAT (Game + System)
GameFolder tmpFolder = new GameFolder(string.Empty);
tmpFolder.AddFolders(this.sysFolder.Folders); // Overlay folders
tmpFolder.AddFolder(this.root); // Game files
// Write File Allocation Table
Fat fat = new Fat();
fat.Initialize(null, tmpFolder, Banner.Size + this.header.HeaderSize); // First file offset after banner
this.header.FatOffset = (uint)(this.header.HeaderSize + str.Position);
fat.Write(str);
str.WritePadding(FileSystem.PaddingByte, FileSystem.PaddingAddress);
this.header.FatSize = fat.Size;
}
/// <summary>
/// Read the file system of the ROM and create the folder tree.
/// </summary>
/// <param name="str">Stream to read the file system.</param>
public override void Read(DataStream str)
{
// Read File Allocation Table
// I'm creating a new DataStream variable because Fat class needs to know its length.
DataStream fatStr = new DataStream(str, this.header.FatOffset, this.header.FatSize);
Fat fat = new Fat();
fat.Read(fatStr);
fatStr.Dispose();
// Read File Name Table
str.Seek(header.FntOffset, SeekMode.Origin);
Fnt fnt = new Fnt();
fnt.Read(str);
// Get root folder
this.root = fnt.CreateTree(fat.GetFiles());
// Get ARM and Overlay files
this.sysFolder = new GameFolder("System");
this.sysFolder.AddFile(ArmFile.FromStream(str, this.header, true));
this.sysFolder.AddFolder(OverlayFolder.FromTable(str, this.header, true, fat.GetFiles()));
this.sysFolder.AddFile(ArmFile.FromStream(str, this.header, false));
this.sysFolder.AddFolder(OverlayFolder.FromTable(str, this.header, false, fat.GetFiles()));
}