private static void CalculateMC02Checksums(Stream stream, MC02Header mc02Header)
{
var headerBuffer = new byte[0x18];
var chunk0Buffer = new byte[mc02Header.Chunk0Length];
var chunk1Buffer = new byte[mc02Header.Chunk1Length];
stream.Seek(0x2834, SeekOrigin.Begin);
stream.Read(headerBuffer, 0, headerBuffer.Length);
stream.Seek(4, SeekOrigin.Current);
stream.Read(chunk0Buffer, 0, chunk0Buffer.Length);
stream.Read(chunk1Buffer, 0, chunk1Buffer.Length);
mc02Header.Checksum0 = CalculateMC02Checksum(chunk0Buffer);
mc02Header.Checksum1 = CalculateMC02Checksum(chunk1Buffer);
var csBytes = new byte[4];
csBytes = BitConverter.GetBytes(mc02Header.Checksum0);
headerBuffer[16] = csBytes[0];
headerBuffer[17] = csBytes[1];
headerBuffer[18] = csBytes[2];
headerBuffer[19] = csBytes[3];
csBytes = BitConverter.GetBytes(mc02Header.Checksum1);
headerBuffer[20] = csBytes[0];
headerBuffer[21] = csBytes[1];
headerBuffer[22] = csBytes[2];
headerBuffer[23] = csBytes[3];
mc02Header.Checksum2 = CalculateMC02Checksum(headerBuffer);
}
public static void FixChecksums(MemoryStream stream, MC02Header mc02Header)
{
#region Fix save data hash
var saveDataHash = CalculateSaveDataHash(stream);
stream.Seek(0x2854, SeekOrigin.Begin);
stream.Write(BitConverter.GetBytes(saveDataHash), 0, 4);
#endregion
#region Fix mc02 checksums
CalculateMC02Checksums(stream, mc02Header);
stream.Seek(0x2844, SeekOrigin.Begin);
stream.Write(BitConverter.GetBytes(mc02Header.Checksum0), 0, 4);
stream.Write(BitConverter.GetBytes(mc02Header.Checksum1), 0, 4);
stream.Write(BitConverter.GetBytes(mc02Header.Checksum2), 0, 4);
#endregion
}