ME3Explorer.Packages.ME2Package.ME2Package C# (CSharp) Method

        private ME2Package(string path)
        {
            
            DebugOutput.PrintLn("Load file : " + path);
            FileName = Path.GetFullPath(path);
            MemoryStream tempStream = new MemoryStream();
            if (!File.Exists(FileName))
                throw new FileNotFoundException("PCC file not found");
            using (FileStream fs = new FileStream(FileName, FileMode.Open, FileAccess.Read))
            {
                FileInfo tempInfo = new FileInfo(FileName);
                tempStream.WriteFromStream(fs, tempInfo.Length);
                if (tempStream.Length != tempInfo.Length)
                {
                    throw new FileLoadException("File not fully read in. Try again later");
                }
            }

            tempStream.Seek(12, SeekOrigin.Begin);
            int tempNameSize = tempStream.ReadValueS32();
            tempStream.Seek(64 + tempNameSize, SeekOrigin.Begin);
            int tempGenerations = tempStream.ReadValueS32();
            tempStream.Seek(36 + tempGenerations * 12, SeekOrigin.Current);
            int tempPos = (int)tempStream.Position;
            tempStream.Seek(0, SeekOrigin.Begin);
            header = tempStream.ReadBytes(tempPos);
            tempStream.Seek(0, SeekOrigin.Begin);

            if (magic != ZBlock.magic && magic.Swap() != ZBlock.magic)
            {
                DebugOutput.PrintLn("Magic number incorrect: " + magic);
                throw new FormatException("This is not a pcc file. The magic number is incorrect.");
            }

            MemoryStream listsStream;
            if (IsCompressed)
            {
                DebugOutput.PrintLn("File is compressed");
                {
                    listsStream = CompressionHelper.DecompressME1orME2(tempStream);

                    //Correct the header
                    IsCompressed = false;
                    listsStream.Seek(0, SeekOrigin.Begin);
                    listsStream.WriteBytes(header);

                    //Set numblocks to zero
                    listsStream.WriteValueS32(0);
                    //Write the magic number
                    listsStream.WriteValueS32(1026281201);
                    //Write 8 bytes of 0
                    listsStream.WriteValueS32(0);
                    listsStream.WriteValueS32(0);
                }
            }
            else
            {
                DebugOutput.PrintLn("File already decompressed. Reading decompressed data.");
                listsStream = tempStream;
            }

            ReadNames(listsStream);
            ReadImports(listsStream);
            ReadExports(listsStream);
        }