Ejemplo n.º 1
0
        /// <summary>
        /// Finishes the stream.  This will write the central directory at the
        /// end of the zip file and flush the stream.
        /// </summary>
        /// <remarks>
        /// This is automatically called when the stream is closed.
        /// </remarks>
        /// <exception cref="System.IO.IOException">
        /// An I/O error occurs.
        /// </exception>
        /// <exception cref="ZipException">
        /// Comment exceeds the maximum length<br/>
        /// Entry name exceeds the maximum length
        /// </exception>
        public override void Finish()
        {
            if (entries == null)
            {
                return;
            }

            if (curEntry != null)
            {
                CloseEntry();
            }

            long numEntries = entries.Count;
            long sizeEntries = 0;

            foreach (ZipEntry entry in entries)
            {
                WriteLeInt(ZipConstants.CentralHeaderSignature);
                WriteLeShort(ZipConstants.VersionMadeBy);
                WriteLeShort(entry.Version);
                WriteLeShort(entry.Flags);
                WriteLeShort((short)entry.CompressionMethodForHeader);
                WriteLeInt((int)entry.DosTime);
                WriteLeInt((int)entry.Crc);

                if (entry.IsZip64Forced() ||
                    (entry.CompressedSize >= uint.MaxValue))
                {
                    WriteLeInt(-1);
                }
                else
                {
                    WriteLeInt((int)entry.CompressedSize);
                }

                if (entry.IsZip64Forced() ||
                    (entry.Size >= uint.MaxValue))
                {
                    WriteLeInt(-1);
                }
                else
                {
                    WriteLeInt((int)entry.Size);
                }

                byte[] name = ZipConstants.ConvertToArray(entry.Flags, entry.Name);

                if (name.Length > 0xffff)
                {
                    throw new ZipException("Name too long.");
                }

                ZipExtraData ed = new ZipExtraData(entry.ExtraData);

                if (entry.CentralHeaderRequiresZip64)
                {
                    ed.StartNewEntry();
                    if (entry.IsZip64Forced() ||
                        (entry.Size >= 0xffffffff))
                    {
                        ed.AddLeLong(entry.Size);
                    }

                    if (entry.IsZip64Forced() ||
                        (entry.CompressedSize >= 0xffffffff))
                    {
                        ed.AddLeLong(entry.CompressedSize);
                    }

                    if (entry.Offset >= 0xffffffff)
                    {
                        ed.AddLeLong(entry.Offset);
                    }

                    ed.AddNewEntry(1);
                }
                else
                {
                    ed.Delete(1);
                }

#if !NET_1_1 && !NETCF_2_0
                if (entry.AESKeySize > 0)
                {
                    AddExtraDataAES(entry, ed);
                }
#endif
                byte[] extra = ed.GetEntryData();

                byte[] entryComment =
                    (entry.Comment != null) ?
                    ZipConstants.ConvertToArray(entry.Flags, entry.Comment) :
                    new byte[0];

                if (entryComment.Length > 0xffff)
                {
                    throw new ZipException("Comment too long.");
                }

                WriteLeShort(name.Length);
                WriteLeShort(extra.Length);
                WriteLeShort(entryComment.Length);
                WriteLeShort(0);	// disk number
                WriteLeShort(0);	// internal file attributes
                // external file attributes

                if (entry.ExternalFileAttributes != -1)
                {
                    WriteLeInt(entry.ExternalFileAttributes);
                }
                else
                {
                    if (entry.IsDirectory)
                    {                         // mark entry as directory (from nikolam.AT.perfectinfo.com)
                        WriteLeInt(16);
                    }
                    else
                    {
                        WriteLeInt(0);
                    }
                }

                if (entry.Offset >= uint.MaxValue)
                {
                    WriteLeInt(-1);
                }
                else
                {
                    WriteLeInt((int)entry.Offset);
                }

                if (name.Length > 0)
                {
                    baseOutputStream_.Write(name, 0, name.Length);
                }

                if (extra.Length > 0)
                {
                    baseOutputStream_.Write(extra, 0, extra.Length);
                }

                if (entryComment.Length > 0)
                {
                    baseOutputStream_.Write(entryComment, 0, entryComment.Length);
                }

                sizeEntries += ZipConstants.CentralHeaderBaseSize + name.Length + extra.Length + entryComment.Length;
            }

            using (ZipHelperStream zhs = new ZipHelperStream(baseOutputStream_))
            {
                zhs.WriteEndOfCentralDirectory(numEntries, sizeEntries, offset, zipComment);
            }

            entries = null;
        }
Ejemplo n.º 2
0
        /// <summary>
        /// Test an archive for integrity/validity
        /// </summary>
        /// <param name="testData">Perform low level data Crc check</param>
        /// <param name="strategy">The <see cref="TestStrategy"></see> to apply.</param>
        /// <param name="resultHandler">The <see cref="ZipTestResultHandler"></see> handler to call during testing.</param>
        /// <returns>true if all tests pass, false otherwise</returns>
        /// <exception cref="ObjectDisposedException">The object has already been closed.</exception>
        public bool TestArchive(bool testData, TestStrategy strategy, ZipTestResultHandler resultHandler)
        {
            if (isDisposed_)
            {
                throw new ObjectDisposedException("ZipFile");
            }

            TestStatus status = new TestStatus(this);

            if (resultHandler != null)
            {
                resultHandler(status, null);
            }

            HeaderTest test = testData ? (HeaderTest.Header | HeaderTest.Extract) : HeaderTest.Header;

            bool testing = true;

            try
            {
                int entryIndex = 0;

                while (testing && (entryIndex < Count))
                {
                    if (resultHandler != null)
                    {
                        status.SetEntry(this[entryIndex]);
                        status.SetOperation(TestOperation.EntryHeader);
                        resultHandler(status, null);
                    }

                    try
                    {
                        TestLocalHeader(this[entryIndex], test);
                    }
                    catch (ZipException ex)
                    {
                        status.AddError();

                        if (resultHandler != null)
                        {
                            resultHandler(status,
                                string.Format("Exception during test - '{0}'", ex.Message));
                        }

                        if (strategy == TestStrategy.FindFirstError)
                        {
                            testing = false;
                        }
                    }

                    if (testing && testData && this[entryIndex].IsFile)
                    {
                        if (resultHandler != null)
                        {
                            status.SetOperation(TestOperation.EntryData);
                            resultHandler(status, null);
                        }

                        Crc32 crc = new Crc32();

                        using (Stream entryStream = this.GetInputStream(this[entryIndex]))
                        {

                            byte[] buffer = new byte[4096];
                            long totalBytes = 0;
                            int bytesRead;
                            while ((bytesRead = entryStream.Read(buffer, 0, buffer.Length)) > 0)
                            {
                                crc.Update(buffer, 0, bytesRead);

                                if (resultHandler != null)
                                {
                                    totalBytes += bytesRead;
                                    status.SetBytesTested(totalBytes);
                                    resultHandler(status, null);
                                }
                            }
                        }

                        if (this[entryIndex].Crc != crc.Value)
                        {
                            status.AddError();

                            if (resultHandler != null)
                            {
                                resultHandler(status, "CRC mismatch");
                            }

                            if (strategy == TestStrategy.FindFirstError)
                            {
                                testing = false;
                            }
                        }

                        if ((this[entryIndex].Flags & (int)GeneralBitFlags.Descriptor) != 0)
                        {
                            ZipHelperStream helper = new ZipHelperStream(baseStream_);
                            DescriptorData data = new DescriptorData();
                            helper.ReadDataDescriptor(this[entryIndex].LocalHeaderRequiresZip64, data);
                            if (this[entryIndex].Crc != data.Crc)
                            {
                                status.AddError();
                            }

                            if (this[entryIndex].CompressedSize != data.CompressedSize)
                            {
                                status.AddError();
                            }

                            if (this[entryIndex].Size != data.Size)
                            {
                                status.AddError();
                            }
                        }
                    }

                    if (resultHandler != null)
                    {
                        status.SetOperation(TestOperation.EntryComplete);
                        resultHandler(status, null);
                    }

                    entryIndex += 1;
                }

                if (resultHandler != null)
                {
                    status.SetOperation(TestOperation.MiscellaneousTests);
                    resultHandler(status, null);
                }

                // TODO: the 'Corrina Johns' test where local headers are missing from
                // the central directory.  They are therefore invisible to many archivers.
            }
            catch (Exception ex)
            {
                status.AddError();

                if (resultHandler != null)
                {
                    resultHandler(status, string.Format("Exception during test - '{0}'", ex.Message));
                }
            }

            if (resultHandler != null)
            {
                status.SetOperation(TestOperation.Complete);
                status.SetEntry(null);
                resultHandler(status, null);
            }

            return (status.ErrorCount == 0);
        }
Ejemplo n.º 3
0
        /// <summary>
        /// Finishes the stream.  This will write the central directory at the
        /// end of the zip file and flush the stream.
        /// </summary>
        /// <remarks>
        /// This is automatically called when the stream is closed.
        /// </remarks>
        /// <exception cref="System.IO.IOException">
        /// An I/O error occurs.
        /// </exception>
        /// <exception cref="ZipException">
        /// Comment exceeds the maximum length<br/>
        /// Entry name exceeds the maximum length
        /// </exception>
        public override void Finish()
        {
            if (entries == null)
            {
                return;
            }

            if (curEntry != null)
            {
                CloseEntry();
            }

            long numEntries  = entries.Count;
            long sizeEntries = 0;

            foreach (ZipEntry entry in entries)
            {
                WriteLeInt(ZipConstants.CentralHeaderSignature);
                WriteLeShort(ZipConstants.VersionMadeBy);
                WriteLeShort(entry.Version);
                WriteLeShort(entry.Flags);
                WriteLeShort((short)entry.CompressionMethodForHeader);
                WriteLeInt((int)entry.DosTime);
                WriteLeInt((int)entry.Crc);

                if (entry.IsZip64Forced() ||
                    (entry.CompressedSize >= uint.MaxValue))
                {
                    WriteLeInt(-1);
                }
                else
                {
                    WriteLeInt((int)entry.CompressedSize);
                }

                if (entry.IsZip64Forced() ||
                    (entry.Size >= uint.MaxValue))
                {
                    WriteLeInt(-1);
                }
                else
                {
                    WriteLeInt((int)entry.Size);
                }

                byte[] name = ZipConstants.ConvertToArray(entry.Flags, entry.Name);

                if (name.Length > 0xffff)
                {
                    throw new ZipException("Name too long.");
                }

                ZipExtraData ed = new ZipExtraData(entry.ExtraData);

                if (entry.CentralHeaderRequiresZip64)
                {
                    ed.StartNewEntry();
                    if (entry.IsZip64Forced() ||
                        (entry.Size >= 0xffffffff))
                    {
                        ed.AddLeLong(entry.Size);
                    }

                    if (entry.IsZip64Forced() ||
                        (entry.CompressedSize >= 0xffffffff))
                    {
                        ed.AddLeLong(entry.CompressedSize);
                    }

                    if (entry.Offset >= 0xffffffff)
                    {
                        ed.AddLeLong(entry.Offset);
                    }

                    ed.AddNewEntry(1);
                }
                else
                {
                    ed.Delete(1);
                }

#if !NET_1_1 && !NETCF_2_0
                if (entry.AESKeySize > 0)
                {
                    AddExtraDataAES(entry, ed);
                }
#endif
                byte[] extra = ed.GetEntryData();

                byte[] entryComment =
                    (entry.Comment != null) ?
                    ZipConstants.ConvertToArray(entry.Flags, entry.Comment) :
                    new byte[0];

                if (entryComment.Length > 0xffff)
                {
                    throw new ZipException("Comment too long.");
                }

                WriteLeShort(name.Length);
                WriteLeShort(extra.Length);
                WriteLeShort(entryComment.Length);
                WriteLeShort(0);        // disk number
                WriteLeShort(0);        // internal file attributes
                // external file attributes

                if (entry.ExternalFileAttributes != -1)
                {
                    WriteLeInt(entry.ExternalFileAttributes);
                }
                else
                {
                    if (entry.IsDirectory)
                    {                         // mark entry as directory (from nikolam.AT.perfectinfo.com)
                        WriteLeInt(16);
                    }
                    else
                    {
                        WriteLeInt(0);
                    }
                }

                if (entry.Offset >= uint.MaxValue)
                {
                    WriteLeInt(-1);
                }
                else
                {
                    WriteLeInt((int)entry.Offset);
                }

                if (name.Length > 0)
                {
                    baseOutputStream_.Write(name, 0, name.Length);
                }

                if (extra.Length > 0)
                {
                    baseOutputStream_.Write(extra, 0, extra.Length);
                }

                if (entryComment.Length > 0)
                {
                    baseOutputStream_.Write(entryComment, 0, entryComment.Length);
                }

                sizeEntries += ZipConstants.CentralHeaderBaseSize + name.Length + extra.Length + entryComment.Length;
            }

            using (ZipHelperStream zhs = new ZipHelperStream(baseOutputStream_))
            {
                zhs.WriteEndOfCentralDirectory(numEntries, sizeEntries, offset, zipComment);
            }

            entries = null;
        }
Ejemplo n.º 4
0
        void RunUpdates()
        {
            long sizeEntries = 0;
            long endOfStream = 0;
            bool directUpdate = false;
            long destinationPosition = 0; // NOT SFX friendly

            ZipFile workFile;

            if (IsNewArchive)
            {
                workFile = this;
                workFile.baseStream_.Position = 0;
                directUpdate = true;
            }
            else if (archiveStorage_.UpdateMode == FileUpdateMode.Direct)
            {
                workFile = this;
                workFile.baseStream_.Position = 0;
                directUpdate = true;

                // Sort the updates by offset within copies/modifies, then adds.
                // This ensures that data required by copies will not be overwritten.
                updates_.Sort(new UpdateComparer());
            }
            else
            {
                workFile = ZipFile.Create(archiveStorage_.GetTemporaryOutput());
                workFile.UseZip64 = UseZip64;

                if (key != null)
                {
                    workFile.key = (byte[])key.Clone();
                }
            }

            try
            {
                foreach (ZipUpdate update in updates_)
                {
                    if (update != null)
                    {
                        switch (update.Command)
                        {
                            case UpdateCommand.Copy:
                                if (directUpdate)
                                {
                                    CopyEntryDirect(workFile, update, ref destinationPosition);
                                }
                                else
                                {
                                    CopyEntry(workFile, update);
                                }
                                break;

                            case UpdateCommand.Modify:
                                // TODO: Direct modifying of an entry will take some legwork.
                                ModifyEntry(workFile, update);
                                break;

                            case UpdateCommand.Add:
                                if (!IsNewArchive && directUpdate)
                                {
                                    workFile.baseStream_.Position = destinationPosition;
                                }

                                AddEntry(workFile, update);

                                if (directUpdate)
                                {
                                    destinationPosition = workFile.baseStream_.Position;
                                }
                                break;
                        }
                    }
                }

                if (!IsNewArchive && directUpdate)
                {
                    workFile.baseStream_.Position = destinationPosition;
                }

                long centralDirOffset = workFile.baseStream_.Position;

                foreach (ZipUpdate update in updates_)
                {
                    if (update != null)
                    {
                        sizeEntries += workFile.WriteCentralDirectoryHeader(update.OutEntry);
                    }
                }

                byte[] theComment = (newComment_ != null) ? newComment_.RawComment : ZipConstants.ConvertToArray(comment_);
                using (ZipHelperStream zhs = new ZipHelperStream(workFile.baseStream_))
                {
                    zhs.WriteEndOfCentralDirectory(updateCount_, sizeEntries, centralDirOffset, theComment);
                }

                endOfStream = workFile.baseStream_.Position;

                // And now patch entries...
                foreach (ZipUpdate update in updates_)
                {
                    if (update != null)
                    {
                        // If the size of the entry is zero leave the crc as 0 as well.
                        // The calculated crc will be all bits on...
                        if ((update.CrcPatchOffset > 0) && (update.OutEntry.CompressedSize > 0))
                        {
                            workFile.baseStream_.Position = update.CrcPatchOffset;
                            workFile.WriteLEInt((int)update.OutEntry.Crc);
                        }

                        if (update.SizePatchOffset > 0)
                        {
                            workFile.baseStream_.Position = update.SizePatchOffset;
                            if (update.OutEntry.LocalHeaderRequiresZip64)
                            {
                                workFile.WriteLeLong(update.OutEntry.Size);
                                workFile.WriteLeLong(update.OutEntry.CompressedSize);
                            }
                            else
                            {
                                workFile.WriteLEInt((int)update.OutEntry.CompressedSize);
                                workFile.WriteLEInt((int)update.OutEntry.Size);
                            }
                        }
                    }
                }
            }
            catch
            {
                workFile.Close();
                if (!directUpdate && (workFile.Name != null))
                {
                    File.Delete(workFile.Name);
                }
                throw;
            }

            if (directUpdate)
            {
                workFile.baseStream_.SetLength(endOfStream);
                workFile.baseStream_.Flush();
                isNewArchive_ = false;
                ReadEntries();
            }
            else
            {
                baseStream_.Close();
                Reopen(archiveStorage_.ConvertTemporaryToFinal());
            }
        }
Ejemplo n.º 5
0
 // NOTE this returns the offset of the first byte after the signature.
 long LocateBlockWithSignature(int signature, long endLocation, int minimumBlockSize, int maximumVariableData)
 {
     using (ZipHelperStream les = new ZipHelperStream(baseStream_))
     {
         return les.LocateBlockWithSignature(signature, endLocation, minimumBlockSize, maximumVariableData);
     }
 }
Ejemplo n.º 6
0
        void AddEntry(ZipFile workFile, ZipUpdate update)
        {
            Stream source = null;

            if (update.Entry.IsFile)
            {
                source = update.GetSource();

                if (source == null)
                {
                    source = updateDataSource_.GetSource(update.Entry, update.Filename);
                }
            }

            if (source != null)
            {
                using (source)
                {
                    long sourceStreamLength = source.Length;
                    if (update.OutEntry.Size < 0)
                    {
                        update.OutEntry.Size = sourceStreamLength;
                    }
                    else
                    {
                        // Check for errant entries.
                        if (update.OutEntry.Size != sourceStreamLength)
                        {
                            throw new ZipException("Entry size/stream size mismatch");
                        }
                    }

                    workFile.WriteLocalEntryHeader(update);

                    long dataStart = workFile.baseStream_.Position;

                    using (Stream output = workFile.GetOutputStream(update.OutEntry))
                    {
                        CopyBytes(update, output, source, sourceStreamLength, true);
                    }

                    long dataEnd = workFile.baseStream_.Position;
                    update.OutEntry.CompressedSize = dataEnd - dataStart;

                    if ((update.OutEntry.Flags & (int)GeneralBitFlags.Descriptor) == (int)GeneralBitFlags.Descriptor)
                    {
                        ZipHelperStream helper = new ZipHelperStream(workFile.baseStream_);
                        helper.WriteDataDescriptor(update.OutEntry);
                    }
                }
            }
            else
            {
                workFile.WriteLocalEntryHeader(update);
                update.OutEntry.CompressedSize = 0;
            }

        }
Ejemplo n.º 7
0
        void UpdateCommentOnly()
        {
            long baseLength = baseStream_.Length;

            ZipHelperStream updateFile = null;

            if (archiveStorage_.UpdateMode == FileUpdateMode.Safe)
            {
                Stream copyStream = archiveStorage_.MakeTemporaryCopy(baseStream_);
                updateFile = new ZipHelperStream(copyStream);
                updateFile.IsStreamOwner = true;

                baseStream_.Close();
                baseStream_ = null;
            }
            else
            {
                if (archiveStorage_.UpdateMode == FileUpdateMode.Direct)
                {
                    // TODO: archiveStorage wasnt originally intended for this use.
                    // Need to revisit this to tidy up handling as archive storage currently doesnt 
                    // handle the original stream well.
                    // The problem is when using an existing zip archive with an in memory archive storage.
                    // The open stream wont support writing but the memory storage should open the same file not an in memory one.

                    // Need to tidy up the archive storage interface and contract basically.
                    baseStream_ = archiveStorage_.OpenForDirectUpdate(baseStream_);
                    updateFile = new ZipHelperStream(baseStream_);
                }
                else
                {
                    baseStream_.Close();
                    baseStream_ = null;
                    updateFile = new ZipHelperStream(Name);
                }
            }

            using (updateFile)
            {
                long locatedCentralDirOffset =
                    updateFile.LocateBlockWithSignature(ZipConstants.EndOfCentralDirectorySignature,
                                                        baseLength, ZipConstants.EndOfCentralRecordBaseSize, 0xffff);
                if (locatedCentralDirOffset < 0)
                {
                    throw new ZipException("Cannot find central directory");
                }

                const int CentralHeaderCommentSizeOffset = 16;
                updateFile.Position += CentralHeaderCommentSizeOffset;

                byte[] rawComment = newComment_.RawComment;

                updateFile.WriteLEShort(rawComment.Length);
                updateFile.Write(rawComment, 0, rawComment.Length);
                updateFile.SetLength(updateFile.Position);
            }

            if (archiveStorage_.UpdateMode == FileUpdateMode.Safe)
            {
                Reopen(archiveStorage_.ConvertTemporaryToFinal());
            }
            else
            {
                ReadEntries();
            }
        }
Ejemplo n.º 8
0
        /// <summary>
        /// Commit current updates, updating this archive.
        /// </summary>
        /// <seealso cref="BeginUpdate()"></seealso>
        /// <seealso cref="AbortUpdate"></seealso>
        /// <exception cref="ObjectDisposedException">ZipFile has been closed.</exception>
        public void CommitUpdate()
        {
            if (isDisposed_)
            {
                throw new ObjectDisposedException("ZipFile");
            }

            CheckUpdating();

            try
            {
                updateIndex_.Clear();
                updateIndex_ = null;

                if (contentsEdited_)
                {
                    RunUpdates();
                }
                else if (commentEdited_)
                {
                    UpdateCommentOnly();
                }
                else
                {
                    // Create an empty archive if none existed originally.
                    if (entries_.Length == 0)
                    {
                        byte[] theComment = (newComment_ != null) ? newComment_.RawComment : ZipConstants.ConvertToArray(comment_);
                        using (ZipHelperStream zhs = new ZipHelperStream(baseStream_))
                        {
                            zhs.WriteEndOfCentralDirectory(0, 0, 0, theComment);
                        }
                    }
                }

            }
            finally
            {
                PostUpdateCleanup();
            }
        }
Ejemplo n.º 9
0
 /// <summary>
 /// Get the binary data representing this instance.
 /// </summary>
 /// <returns>The raw binary data representing this instance.</returns>
 public byte[] GetData()
 {
     using (MemoryStream ms = new MemoryStream())
     using (ZipHelperStream helperStream = new ZipHelperStream(ms))
     {
         helperStream.IsStreamOwner = false;
         helperStream.WriteLEInt(0);       // Reserved
         helperStream.WriteLEShort(1);     // Tag
         helperStream.WriteLEShort(24);    // Length = 3 x 8.
         helperStream.WriteLELong(_lastModificationTime.ToFileTime());
         helperStream.WriteLELong(_lastAccessTime.ToFileTime());
         helperStream.WriteLELong(_createTime.ToFileTime());
         return ms.ToArray();
     }
 }
Ejemplo n.º 10
0
        /// <summary>
        /// Set the data from the raw values provided.
        /// </summary>
        /// <param name="data">The raw data to extract values from.</param>
        /// <param name="index">The index to start extracting values from.</param>
        /// <param name="count">The number of bytes available.</param>
        public void SetData(byte[] data, int index, int count)
        {
            using (MemoryStream ms = new MemoryStream(data, index, count, false))
            using (ZipHelperStream helperStream = new ZipHelperStream(ms))
            {
                helperStream.ReadLEInt(); // Reserved
                while (helperStream.Position < helperStream.Length)
                {
                    int ntfsTag = helperStream.ReadLEShort();
                    int ntfsLength = helperStream.ReadLEShort();
                    if (ntfsTag == 1)
                    {
                        if (ntfsLength >= 24)
                        {
                            long lastModificationTicks = helperStream.ReadLELong();
                            _lastModificationTime = DateTime.FromFileTime(lastModificationTicks);

                            long lastAccessTicks = helperStream.ReadLELong();
                            _lastAccessTime = DateTime.FromFileTime(lastAccessTicks);

                            long createTimeTicks = helperStream.ReadLELong();
                            _createTime = DateTime.FromFileTime(createTimeTicks);
                        }
                        break;
                    }
                    else
                    {
                        // An unknown NTFS tag so simply skip it.
                        helperStream.Seek(ntfsLength, SeekOrigin.Current);
                    }
                }
            }
        }
Ejemplo n.º 11
0
 /// <summary>
 /// Get the binary data representing this instance.
 /// </summary>
 /// <returns>The raw binary data representing this instance.</returns>
 public byte[] GetData()
 {
     using (MemoryStream ms = new MemoryStream())
     using (ZipHelperStream helperStream = new ZipHelperStream(ms))
     {
         helperStream.IsStreamOwner = false;
         helperStream.WriteByte((byte)_flags);     // Flags
         if ((_flags & Flags.ModificationTime) != 0)
         {
             TimeSpan span = _modificationTime.ToUniversalTime() - new DateTime(1970, 1, 1, 0, 0, 0).ToUniversalTime();
             int seconds = (int)span.TotalSeconds;
             helperStream.WriteLEInt(seconds);
         }
         if ((_flags & Flags.AccessTime) != 0)
         {
             TimeSpan span = _lastAccessTime.ToUniversalTime() - new DateTime(1970, 1, 1, 0, 0, 0).ToUniversalTime();
             int seconds = (int)span.TotalSeconds;
             helperStream.WriteLEInt(seconds);
         }
         if ((_flags & Flags.CreateTime) != 0)
         {
             TimeSpan span = _createTime.ToUniversalTime() - new DateTime(1970, 1, 1, 0, 0, 0).ToUniversalTime();
             int seconds = (int)span.TotalSeconds;
             helperStream.WriteLEInt(seconds);
         }
         return ms.ToArray();
     }
 }
Ejemplo n.º 12
0
        /// <summary>
        /// Set the data from the raw values provided.
        /// </summary>
        /// <param name="data">The raw data to extract values from.</param>
        /// <param name="index">The index to start extracting values from.</param>
        /// <param name="count">The number of bytes available.</param>
        public void SetData(byte[] data, int index, int count)
        {
            using (MemoryStream ms = new MemoryStream(data, index, count, false))
            using (ZipHelperStream helperStream = new ZipHelperStream(ms))
            {
                // bit 0           if set, modification time is present
                // bit 1           if set, access time is present
                // bit 2           if set, creation time is present

                _flags = (Flags)helperStream.ReadByte();
                if (((_flags & Flags.ModificationTime) != 0) && (count >= 5))
                {
                    int iTime = helperStream.ReadLEInt();

                    _modificationTime = (new DateTime(1970, 1, 1, 0, 0, 0).ToUniversalTime() +
                        new TimeSpan(0, 0, 0, iTime, 0)).ToLocalTime();
                }

                if ((_flags & Flags.AccessTime) != 0)
                {
                    int iTime = helperStream.ReadLEInt();

                    _lastAccessTime = (new DateTime(1970, 1, 1, 0, 0, 0).ToUniversalTime() +
                        new TimeSpan(0, 0, 0, iTime, 0)).ToLocalTime();
                }

                if ((_flags & Flags.CreateTime) != 0)
                {
                    int iTime = helperStream.ReadLEInt();

                    _createTime = (new DateTime(1970, 1, 1, 0, 0, 0).ToUniversalTime() +
                        new TimeSpan(0, 0, 0, iTime, 0)).ToLocalTime();
                }
            }
        }