/// <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()));
}
private void WriteArm(DataStream str, bool isArm9)
{
// Write the ARM file.
foreach (GameFile file in this.sysFolder.Files)
{
ArmFile arm = file as ArmFile;
if (arm == null || arm.IsArm9 != isArm9)
{
continue;
}
// Writes to this Stream but sets the its address after RomHeader
arm.UpdateAndWrite(str, this.header, this.header.HeaderSize);
str.WritePadding(FileSystem.PaddingByte, FileSystem.PaddingAddress);
}
// Writes the overlay table and overlays
foreach (GameFolder folder in this.sysFolder.Folders)
{
OverlayFolder overlayFolder = folder as OverlayFolder;
if (overlayFolder == null || overlayFolder.IsArm9 != isArm9)
{
continue;
}
// Writes overlay info
overlayFolder.WriteTable(str, this.header, this.header.HeaderSize);
str.WritePadding(FileSystem.PaddingByte, FileSystem.PaddingAddress);
// Write overlays
foreach (GameFile file in overlayFolder.Files)
{
OverlayFile overlay = file as OverlayFile;
if (overlay == null)
{
continue;
}
overlay.WriteAddress = (uint)(this.header.HeaderSize + str.Position);
overlay.Stream.WriteTo(str);
str.WritePadding(FileSystem.PaddingByte, FileSystem.PaddingAddress);
}
}
}
/// <summary>
/// Create a new ARM file from the info of the ROM header.
/// </summary>
/// <param name="str">Stream to read the unknown tail.</param>
/// <param name="header">Header of the current ROM.</param>
/// <param name="romPath">Path to the current ROM.</param>
/// <param name="isArm9">Indicates if must create an ARM9 or ARM7 file.</param>
/// <returns>ARM file.</returns>
public static ArmFile FromStream(DataStream str, RomHeader header, bool isArm9)
{
ArmFile arm;
if (isArm9)
{
arm = new ArmFile("ARM9.bin", new DataStream(str, header.Arm9Offset, header.Arm9Size));
arm.IsArm9 = true;
arm.EntryAddress = header.Arm9EntryAddress;
arm.Autoload = header.Arm9Autoload;
arm.RamAddress = header.Arm9RamAddress;
}
else
{
arm = new ArmFile("ARM7.bin", new DataStream(str, header.Arm7Offset, header.Arm7Size));
arm.IsArm9 = false;
arm.EntryAddress = header.Arm7EntryAddress;
arm.Autoload = header.Arm7Autoload;
arm.RamAddress = header.Arm7RamAddress;
}
// Set the unknown tail
if (isArm9)
{
// It's after the ARM9 file.
str.Seek(header.Arm9Offset + header.Arm9Size, SeekMode.Origin);
// Read until reachs padding byte
List <byte> tail = new List <byte>();
/*byte b = (byte)str.ReadByte();
* while (b != 0xFF) {
* tail.Add(b);
* b = (byte)str.ReadByte();
* }*/
arm.unknownTail = tail.ToArray();
}
return(arm);
}
/// <summary>
/// Create a new ARM file from the info of the ROM header.
/// </summary>
/// <param name="str">Stream to read the unknown tail.</param>
/// <param name="header">Header of the current ROM.</param>
/// <param name="romPath">Path to the current ROM.</param>
/// <param name="isArm9">Indicates if must create an ARM9 or ARM7 file.</param>
/// <returns>ARM file.</returns>
public static ArmFile FromStream(DataStream str, RomHeader header, bool isArm9)
{
ArmFile arm;
if (isArm9) {
arm = new ArmFile("ARM9.bin", new DataStream(str, header.Arm9Offset, header.Arm9Size));
arm.IsArm9 = true;
arm.EntryAddress = header.Arm9EntryAddress;
arm.Autoload = header.Arm9Autoload;
arm.RamAddress = header.Arm9RamAddress;
} else {
arm = new ArmFile("ARM7.bin", new DataStream(str, header.Arm7Offset, header.Arm7Size));
arm.IsArm9 = false;
arm.EntryAddress = header.Arm7EntryAddress;
arm.Autoload = header.Arm7Autoload;
arm.RamAddress = header.Arm7RamAddress;
}
// Set the unknown tail
if (isArm9) {
// It's after the ARM9 file.
str.Seek(header.Arm9Offset + header.Arm9Size, SeekMode.Origin);
// Read until reachs padding byte
List<byte> tail = new List<byte>();
/*byte b = (byte)str.ReadByte();
while (b != 0xFF) {
tail.Add(b);
b = (byte)str.ReadByte();
}*/
arm.unknownTail = tail.ToArray();
}
return arm;
}
