Пример #1
0
        public void Initialize(string filename, bool readOnly, bool logging = false)
        {
            Filename = filename;
            Logging  = logging;

            mutex = new Mutex();

            if (readOnly)
            {
                ReadOnly   = true;
                fileStream = File.Open(filename, FileMode.Open, FileAccess.Read, FileShare.Read);
            }
            else
            {
                try
                {
                    ReadOnly   = false;
                    fileStream = File.Open(filename, FileMode.Open, FileAccess.ReadWrite, FileShare.None);
                }
                catch (IOException)
                {
                    ReadOnly   = true;
                    fileStream = File.Open(filename, FileMode.Open, FileAccess.Read, FileShare.Read);
                }
            }

            try
            {
                mutex.WaitOne();

                customBinaryReader = new CustomBinaryReader(fileStream);
                customBinaryWriter = ReadOnly ? null : new CustomBinaryWriter(fileStream);

                var offset_central_directory_end = FindEndCentralDirectoryOffset(fileStream, customBinaryReader);
                central_directory_end = ReadPK(fileStream, customBinaryReader, offset_central_directory_end) as CentralDirectoryEnd;

                var offset_central_directory_locator_offset = offset_central_directory_end - 0x14;
                central_directory_locator_offset = ReadPK(fileStream, customBinaryReader, offset_central_directory_locator_offset) as CentralDirectoryLocatorOffset;

                var offset_central_directory_locator = central_directory_locator_offset.DirectoryLocatorOffset;
                central_directory_locator = ReadPK(fileStream, customBinaryReader, offset_central_directory_locator) as CentralDirectoryLocator;

                PopulateDirectory(fileStream, customBinaryReader, central_directory_locator);
            }
            finally
            {
                mutex.ReleaseMutex();
            }

            if (Logging)
            {
                Console.WriteLine($"Finished loading {filename}");
            }
        }
Пример #2
0
        public object ReadPK(Stream stream, CustomBinaryReader reader, Int64 offset)
        {
            stream.Seek(offset, SeekOrigin.Begin);

            var magic = reader.ReadInt16();

            if (magic != 0x4B50)
            {
                throw new Exception("Invalid PK offset");
            }

            Signature signature = (Signature)reader.ReadInt16();

            switch (signature)
            {
            case Signature.CentralDirectory:

                CentralDirectory centralDirectory = new CentralDirectory(stream, reader);

                if (Logging)
                {
                    Console.WriteLine($"Found CentralDirectory {centralDirectory.Filename}");
                }
                if (Logging)
                {
                    Console.WriteLine($"Searching for FileStructure @{centralDirectory.Extra.data_offset.ToString("X")}");
                }

                return(centralDirectory);

            case Signature.FileStructure:

                FileStructure fileStructure = new FileStructure(stream, reader);

                if (Logging)
                {
                    Console.WriteLine($"Found FileStructure {fileStructure.Filename}");
                }


                return(fileStructure);

            case Signature.CentralDirectoryLocator:

                CentralDirectoryLocator centralDirectoryLocator = new CentralDirectoryLocator(stream, reader);

                if (Logging)
                {
                    Console.WriteLine($"Found CentralDirectoryLocator @{offset}");
                }

                return(centralDirectoryLocator);

            case Signature.CentralDirectoryLocatorOffset:

                CentralDirectoryLocatorOffset centralDirectoryLocatorOffset = new CentralDirectoryLocatorOffset(stream, reader);

                if (Logging)
                {
                    Console.WriteLine($"Found CentralDirectoryLocatorOffset @{offset}");
                }

                return(centralDirectoryLocatorOffset);

            case Signature.CentralDirectoryEnd:

                CentralDirectoryEnd centralDirectoryEnd = new CentralDirectoryEnd(stream, reader);

                if (Logging)
                {
                    Console.WriteLine($"Found CentralDirectoryEnd @{offset}");
                }

                return(centralDirectoryEnd);

            default:
                throw new NotImplementedException();
            }
        }