LSLib.LS.PackageReader.ReadPackageV13 C# (CSharp) Méthode

        private Package ReadPackageV13(FileStream mainStream, BinaryReader reader)
        {
            var package = new Package();
            var header = BinUtils.ReadStruct<LSPKHeader13>(reader);

            if (header.Version != Package.CurrentVersion)
            {
                var msg = String.Format("Unsupported package version {0}; this extractor only supports {1}", header.Version, Package.CurrentVersion);
                throw new InvalidDataException(msg);
            }

            OpenStreams(mainStream, header.NumParts);
            mainStream.Seek(header.FileListOffset, SeekOrigin.Begin);
            int numFiles = reader.ReadInt32();
            int fileBufferSize = Marshal.SizeOf(typeof(FileEntry13)) * numFiles;
            byte[] compressedFileList = reader.ReadBytes((int)header.FileListSize - 4);

            var uncompressedList = new byte[fileBufferSize];
            var uncompressedSize = LZ4Codec.Decode(compressedFileList, 0, compressedFileList.Length, uncompressedList, 0, fileBufferSize, true);
            if (uncompressedSize != fileBufferSize)
            {
                var msg = String.Format("LZ4 compressor disagrees about the size of file headers; expected {0}, got {1}", fileBufferSize, uncompressedSize);
                throw new InvalidDataException(msg);
            }

            var ms = new MemoryStream(uncompressedList);
            var msr = new BinaryReader(ms);

            for (int i = 0; i < numFiles; i++)
            {
                var entry = BinUtils.ReadStruct<FileEntry13>(msr);
                package.Files.Add(PackagedFileInfo.CreateFromEntry(entry, streams[entry.ArchivePart]));
            }

            return package;
        }