public void Parse(string inputDirectory, string outputDirectory, out List <IPatchResult> patchResults)
{
var startTime = DateTime.Now;
if (Encoding.ASCII.GetString(_reader.ReadBytes(8)) != "WzPatch\x1A")
{
throw new Exception("Not a WzPatch file");
}
_reader.ReadInt32(); // Skipped; version number?
uint checksum = _reader.ReadUInt32();
Console.WriteLine("Checking patchfile checksum....");
if (CRC32.CalculateChecksumStream(_stream) != checksum)
{
throw new Exception("Patch file is corrupt");
}
_reader.BaseStream.Seek(16, SeekOrigin.Begin);
Console.WriteLine("Inflating patchfile....");
_stream.Seek(2, SeekOrigin.Current); // Skip zlib header
var inflatedPatchfile = zlibInflate(_stream);
// Cleanup the previous stream
_stream.Close();
_stream.Dispose();
// Continue with new stream
_stream = inflatedPatchfile;
_stream.Position = 0;
Directory.CreateDirectory(outputDirectory);
rawPatchfilename = Path.Combine(outputDirectory, "rawpatch.bin");
Console.WriteLine($"Saving raw patchdata to disk @ {rawPatchfilename}");
using (var fs = File.OpenWrite(rawPatchfilename))
{
_stream.CopyTo(fs);
}
_stream.Position = 0;
var patchSize = _stream.Length;
Console.WriteLine("Saved patchfile");
_reader = new BinaryReader(_stream);
parseSteps(inputDirectory, outputDirectory, out patchResults);
File.Delete(rawPatchfilename);
File.WriteAllText(Path.Combine(outputDirectory, $"MS-AutoPatcher log {DateTime.Now.ToString("yyyyMMdd HHmmss")}.log"), $@"
Patchfile: {Filename}
Raw patch size {patchSize} bytes
Total time: {DateTime.Now.Subtract(startTime)}
Results:
{string.Join(Environment.NewLine, patchResults.Select(x => x.Filename + "\t\t" + x.Info))}
");
}
