ME3Explorer.Unreal.DLCPackage.DecompressEntry C# (CSharp) Method

        public MemoryStream DecompressEntry(int Index)
        {
            MemoryStream result = new MemoryStream();
            FileEntryStruct e = Files[Index];
           uint count = 0;
            byte[] inputBlock;
            byte[] outputBlock = new byte[Header.MaxBlockSize];
            long left = e.RealUncompressedSize;
            FileStream fs = new FileStream(FileName, FileMode.Open, FileAccess.Read);
            fs.Seek(e.BlockOffsets[0], SeekOrigin.Begin);
            byte[] buff;
            if (e.BlockSizeIndex == 0xFFFFFFFF)
            {
                buff = new byte[e.RealUncompressedSize];
                fs.Read(buff,0,buff.Length);
                result.Write(buff, 0, buff.Length);
            }
            else
            {
                while (left > 0)
                {
                    uint compressedBlockSize = e.BlockSizes[count];
                    if (compressedBlockSize == 0)
                        compressedBlockSize = Header.MaxBlockSize;
                    if (compressedBlockSize == Header.MaxBlockSize || compressedBlockSize == left)
                    {
                        buff = new byte[compressedBlockSize];
                        fs.Read(buff, 0, buff.Length);
                        result.Write(buff, 0, buff.Length);
                        left -= compressedBlockSize;
                    }
                    else
                    {
                        var uncompressedBlockSize = (uint)Math.Min(left, Header.MaxBlockSize);
                        if (compressedBlockSize < 5)
                        {
                            throw new Exception("compressed block size smaller than 5");
                        }
                        inputBlock = new byte[compressedBlockSize];
                        fs.Read(inputBlock, 0, (int)compressedBlockSize);
                        uint actualUncompressedBlockSize = uncompressedBlockSize;
                        uint actualCompressedBlockSize = compressedBlockSize;
                        outputBlock = SevenZipHelper.Decompress(inputBlock, (int)actualUncompressedBlockSize);
                        if (outputBlock.Length != actualUncompressedBlockSize)
                            throw new Exception("Decompression Error");
                        result.Write(outputBlock, 0, (int)actualUncompressedBlockSize);
                        left -= uncompressedBlockSize;
                    }
                    count++;
                }
            }
            fs.Close();
            return result;
        }

 public void ScanDLCfolder2()
 {
     DebugOutput.PrintLn("\n\nDLC Scan for packed files...\n", true);
     string dir = ME3Directory.DLCPath;
     string[] files = Directory.GetFiles(dir, "*.sfar", SearchOption.AllDirectories);
     if (files.Length == 0)
         return;
     pbar1.Maximum = files.Length - 1;
     int count = 0;
     foreach (string file in files)
         if (!file.ToLower().Contains("patch"))
         {
             DebugOutput.PrintLn("Scan file #" + count + " : " + file, count % 10 == 0);
             try
             {
                 DLCPackage dlc = new DLCPackage(file);
                 DebugOutput.PrintLn("found " + dlc.Files.Length + " files : " + file);
                 for (int j = 0; j < dlc.Files.Length; j++)
                 {
                     if (dlc.Files[j].FileName.ToLower().EndsWith(".pcc"))
                     {
                         string filename = dlc.Files[j].FileName;
                         DebugOutput.PrintLn(" " + j.ToString("d4") + " / " + dlc.Files.Length.ToString("d4") + " : opening " + Path.GetFileName(filename),true);
                         MemoryStream mem = dlc.DecompressEntry(j);
                         File.WriteAllBytes("temp.pcc", mem.ToArray());
                         PCCObject pcc = new PCCObject("temp.pcc");
                         for (int i = 0; i < pcc.Exports.Count; i++)
                             if (pcc.Exports[i].ClassName == "BioConversation")
                             {
                                 DebugOutput.PrintLn("Found dialog \"" + pcc.Exports[i].ObjectName + "\"", false);
                                 BioConversation Dialog = new BioConversation(pcc, i);
                                 foreach (BioConversation.EntryListStuct e in Dialog.EntryList)
                                 {
                                     string text = talkFile.findDataById(e.refText);
                                     if (text.Length != 7 && text != "No Data")
                                     {
                                         EntryStruct t = new EntryStruct();
                                         t.inDLC = true;
                                         t.text = text;
                                         t.ID = e.refText;
                                         t.indexpcc = i;
                                         t.pathafc = "";//Todo
                                         t.pathdlc = file;
                                         t.pathpcc = filename;
                                         t.convname = pcc.Exports[i].ObjectName;
                                         if (e.SpeakerIndex >= 0 && e.SpeakerIndex < Dialog.SpeakerList.Count)
                                             t.speaker = pcc.getNameEntry(Dialog.SpeakerList[e.SpeakerIndex]);
                                         else
                                             t.speaker = "unknown";
                                         if (t.speaker == null || t.speaker == "")
                                             t.speaker = "unknown";
                                         Entries.Add(t);
                                         DebugOutput.PrintLn("Requ.: (" + t.speaker + ") " + t.text, false);
                                     }
                                 }
                                 foreach (BioConversation.ReplyListStruct e in Dialog.ReplyList)
                                 {
                                     string text = talkFile.findDataById(e.refText);
                                     if (text.Length != 7 && text != "No Data")
                                     {
                                         EntryStruct t = new EntryStruct();
                                         t.inDLC = true;
                                         t.text = text;
                                         t.ID = e.refText;
                                         t.indexpcc = i;
                                         t.pathafc = "";//Todo
                                         t.pathdlc = file;
                                         t.pathpcc = filename;
                                         t.convname = pcc.Exports[i].ObjectName;
                                         Entries.Add(t);
                                         DebugOutput.PrintLn("Reply: " + t.text, false);
                                     }
                                 }
                             }
                     }
                 }
                 if (count % 10 == 0)
                 {
                     Application.DoEvents();
                     pbar1.Value = count;
                 }
                 count++;
             }
             catch (Exception ex)
             {
                 DebugOutput.PrintLn("=====ERROR=====\n" + ex.ToString() + "\n=====ERROR=====");
             }
         }
     if (File.Exists("temp.pcc"))
         File.Delete("temp.pcc");
 }