public override bool TryApplyPatch(out string failureReason)
{
string fileName;
if (GameFile == GameFile.PakFile)
{
fileName = Chunk + ".pak";
}
else
{
fileName = GameFile.GetFileName();
}
string path = Directory.GetFiles(GameDirectory, fileName, SearchOption.AllDirectories).FirstOrDefault();
if (path == null)
{
failureReason = $"Can't find '{fileName}'";
return(false);
}
string originalBytesString = OriginalBytes.Replace("0x", "").Replace(" ", "").Replace("-", "");
string newBytesString = NewBytes.Replace("0x", "").Replace(" ", "").Replace("-", "");
if (originalBytesString.Length % 2 != 0 || newBytesString.Length % 2 != 0)
{
failureReason = "String of bytes does not have the correct length";
return(false);
}
byte[] originalBytes = originalBytesString.ConvertHexStringToBytes();
byte[] newBytes = newBytesString.ConvertHexStringToBytes();
using (var fs = File.Open(path, FileMode.Open))
{
if (fs.Length < Offset)
{
failureReason = "Invalid offset";
return(false);
}
else
{
fs.Seek(Offset, SeekOrigin);
// Verify original bytes to make sure we're in the right place.
for (int i = 0; i < originalBytes.Length; i++)
{
if (originalBytes[i] != fs.ReadByte())
{
failureReason = $"Byte at offset {Offset} in '{fileName}' is different than expected";
return(false);
}
}
fs.Seek(Offset, SeekOrigin);
fs.Write(newBytes);
}
}
failureReason = "";
return(true);
}
/// <summary>
/// Applies the detour.
/// </summary>
public void Apply()
{
WriteBufferProtected(OriginalFunctionAddress, NewBytes.ToArray());
IsApplied = true;
}
