public static void RemoveAndReadFooter(GBAROM rom, GBAMemoryManager memMan)
{
Stream stream = rom.GetStream();
stream.Seek(-12, SeekOrigin.End);
int length;
uint crc32;
using (BinaryReader reader = new BinaryReader(stream))
{
length = reader.ReadInt32();
int signature = reader.ReadInt32();
crc32 = reader.ReadUInt32();
if (signature != 0x1270D1FE)
{
throw new Exception("No footer present");
}
stream.Seek(12 + length + 12, SeekOrigin.End);
byte[] version = reader.ReadBytes(12); //Like we care
while (stream.Position < stream.Length - 12)
{
byte[] rawid = reader.ReadBytes(4);
string id = new string(Array.ConvertAll(rawid, Convert.ToChar));
int chunkLength = reader.ReadInt32();
if (id == "Free")
{
long endOffset = stream.Position + length;
int offset = 0;
while (stream.Position < endOffset)
{
int relativeOffset = reader.ReadEncodedInteger();
offset += relativeOffset;
int freeLength = reader.ReadEncodedInteger();
memMan.AddManagedSpace(offset, freeLength);
offset += freeLength;
}
}
else
{
stream.Seek(chunkLength, SeekOrigin.Current);
}
}
}
rom.Length -= 12 + length + 12; //Remove footer
}
public void LoadROM(string path)
{
rom.OpenROM(path);
data = GameSpecificData.GetData(rom.GameCode);
memoryManager = new GBAMemoryManager();
bool ROMdataFound = false;
if (File.Exists(Path.ChangeExtension(path, ".xml")))
{
}
else
{
ROMdataFound = FEditor_shit.FEditorSucks.HasFooter(rom);
if (ROMdataFound)
{
FEditor_shit.FEditorSucks.RemoveAndReadFooter(rom, memoryManager);
}
}
if (rom.Length < GBAROM.MaxRomSize)
{
memoryManager.AddManagedSpace(rom.Length, GBAROM.MaxRomSize - rom.Length);
}
else if (rom.Length > GBAROM.MaxRomSize)
{
throw new IOException("ROM is larger than allowed.");
}
if (!ROMdataFound)
{
//Check if ROM hasn't been edited. If hasn't, add default free space.
uint fileCRC32;
using (BinaryReader reader = new BinaryReader(rom.GetStream()))
{
fileCRC32 = CRC32.CalculateCRC32(reader);
}
if (fileCRC32 == data.DefaultCRC32)
{
foreach (var item in data.DefaultFreeSpace)
{
memoryManager.AddManagedSpace(item.Key, item.Value);
}
}
}
int start = rom.ReadPointer(data.TextPointerTableOffset);
LoadHuffmanTree(
rom.ReadPointer(data.HuffmanTreePtrOffset),
rom.ReadPointer(data.HuffmanTreeEndPtrOffset));
LoadRawTextOffsets(data.TextPointerTableOffset, data.TextPointerTableLength);
ui.MaxIndex = textPointers.Length - 1;
}
