/// <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()));
}
/// <summary>
/// Create a folder with all the overlays of the same ARM.
/// </summary>
/// <param name="str">Stream to read the overlay table.</param>
/// <param name="header">Header of the current ROM.</param>
/// <param name="isArm9">If must read overlays from the ARM9 or ARM7.</param>
/// <param name="listFiles">List with all the files in the ROM.</param>
/// <returns>Folder with overlays.</returns>
public static OverlayFolder FromTable(DataStream str, RomHeader header, bool isArm9, GameFile[] listFiles)
{
OverlayFolder overlays = new OverlayFolder(isArm9);
int numOverlays;
if (isArm9) {
str.Seek(header.Ov9TableOffset, SeekMode.Origin);
numOverlays = (int)(header.Ov9TableSize / OverlayFile.TableEntrySize);
} else {
str.Seek(header.Ov7TableOffset, SeekMode.Origin);
numOverlays = (int)(header.Ov7TableSize / OverlayFile.TableEntrySize);
}
for (int i = 0; i < numOverlays; i++)
overlays.AddFile(OverlayFile.FromTable(str, isArm9, listFiles));
return overlays;
}
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);
}
}
}
private int CountOverlays(bool isArm9)
{
int count = 0;
foreach (GameFolder folder in this.sysFolder.Folders)
{
OverlayFolder overlayFolder = folder as OverlayFolder;
if (overlayFolder == null || overlayFolder.IsArm9 != isArm9)
{
continue;
}
foreach (GameFile file in overlayFolder.Files)
{
if (file is OverlayFile)
{
count++;
}
}
}
return(count);
}
/// <summary>
/// Create a folder with all the overlays of the same ARM.
/// </summary>
/// <param name="str">Stream to read the overlay table.</param>
/// <param name="header">Header of the current ROM.</param>
/// <param name="isArm9">If must read overlays from the ARM9 or ARM7.</param>
/// <param name="listFiles">List with all the files in the ROM.</param>
/// <returns>Folder with overlays.</returns>
public static OverlayFolder FromTable(DataStream str, RomHeader header, bool isArm9, GameFile[] listFiles)
{
OverlayFolder overlays = new OverlayFolder(isArm9);
int numOverlays;
if (isArm9)
{
str.Seek(header.Ov9TableOffset, SeekMode.Origin);
numOverlays = (int)(header.Ov9TableSize / OverlayFile.TableEntrySize);
}
else
{
str.Seek(header.Ov7TableOffset, SeekMode.Origin);
numOverlays = (int)(header.Ov7TableSize / OverlayFile.TableEntrySize);
}
for (int i = 0; i < numOverlays; i++)
{
overlays.AddFile(OverlayFile.FromTable(str, isArm9, listFiles));
}
return(overlays);
}
