Code:
/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / Sys / System / IO / compression / CopyEncoder.cs / 1305376 / CopyEncoder.cs
namespace System.IO.Compression { using System.Diagnostics; internal class CopyEncoder { // padding for copy encoder formatting // - 1 byte for header // - 4 bytes for len, nlen private const int PaddingSize = 5; // max uncompressed deflate block size is 64K. private const int MaxUncompressedBlockSize = 65536; // null input means write an empty payload with formatting info. This is needed for the final block. public void GetBlock(DeflateInput input, OutputBuffer output, bool isFinal) { Debug.Assert(output != null); Debug.Assert(output.FreeBytes >= PaddingSize); // determine number of bytes to write int count = 0; if (input != null) { // allow space for padding and bits not yet flushed to buffer count = Math.Min(input.Count, output.FreeBytes - PaddingSize - output.BitsInBuffer); // we don't expect the output buffer to ever be this big (currently 4K), but we'll check this // just in case that changes. if (count > MaxUncompressedBlockSize - PaddingSize) { count = MaxUncompressedBlockSize - PaddingSize; } } // write header and flush bits if (isFinal) { output.WriteBits(FastEncoderStatics.BFinalNoCompressionHeaderBitCount, FastEncoderStatics.BFinalNoCompressionHeader); } else { output.WriteBits(FastEncoderStatics.NoCompressionHeaderBitCount, FastEncoderStatics.NoCompressionHeader); } // now we're aligned output.FlushBits(); // write len, nlen WriteLenNLen((ushort)count, output); // write uncompressed bytes if (input != null && count > 0) { output.WriteBytes(input.Buffer, input.StartIndex, count); input.ConsumeBytes(count); } } private void WriteLenNLen(ushort len, OutputBuffer output) { // len output.WriteUInt16(len); // nlen ushort onesComp = (ushort)(~(ushort)len); output.WriteUInt16(onesComp); } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. All rights reserved.
Link Menu
This book is available now!
Buy at Amazon US or
Buy at Amazon UK
- ElementNotEnabledException.cs
- XamlPoint3DCollectionSerializer.cs
- Style.cs
- TypeDependencyAttribute.cs
- TextTrailingWordEllipsis.cs
- XmlBaseWriter.cs
- DefinitionBase.cs
- ConsumerConnectionPoint.cs
- CommentEmitter.cs
- WhiteSpaceTrimStringConverter.cs
- StringStorage.cs
- EntityDataSourceContainerNameItem.cs
- TextSimpleMarkerProperties.cs
- ProxySimple.cs
- Utility.cs
- QilGeneratorEnv.cs
- CSharpCodeProvider.cs
- TextUtf8RawTextWriter.cs
- HTTPNotFoundHandler.cs
- TypeSemantics.cs
- ParameterReplacerVisitor.cs
- LowerCaseStringConverter.cs
- SqlCommand.cs
- CacheSection.cs
- SafeNativeMethods.cs
- Style.cs
- AssemblyBuilderData.cs
- ProfileParameter.cs
- SchemaNamespaceManager.cs
- InstanceDescriptor.cs
- FontResourceCache.cs
- TextLine.cs
- StylesEditorDialog.cs
- CapiNative.cs
- ServiceNameElement.cs
- Parser.cs
- TextTreeTextNode.cs
- ApplicationServicesHostFactory.cs
- WindowsImpersonationContext.cs
- Connector.cs
- SourceChangedEventArgs.cs
- ListParaClient.cs
- UserControlParser.cs
- CommandEventArgs.cs
- AuthorizationRule.cs
- ZoneLinkButton.cs
- RegexRunnerFactory.cs
- UnSafeCharBuffer.cs
- ColorKeyFrameCollection.cs
- ProcessInfo.cs
- JsonWriter.cs
- EntityDataSourceView.cs
- HttpServerUtilityWrapper.cs
- SimpleHandlerBuildProvider.cs
- RangeValidator.cs
- SingleKeyFrameCollection.cs
- Stream.cs
- TextSelectionHelper.cs
- SqlTypeSystemProvider.cs
- BitmapScalingModeValidation.cs
- DLinqTableProvider.cs
- Subtree.cs
- CryptoKeySecurity.cs
- Directory.cs
- PointLight.cs
- SizeConverter.cs
- HyperLinkStyle.cs
- BindingContext.cs
- Enum.cs
- FastEncoder.cs
- AssemblyBuilderData.cs
- MultiDataTrigger.cs
- FlowLayoutSettings.cs
- mda.cs
- UIElementIsland.cs
- WebPartVerb.cs
- HtmlTextArea.cs
- TypeValidationEventArgs.cs
- MimeXmlReflector.cs
- ChangeConflicts.cs
- SqlFileStream.cs
- PerformanceCountersElement.cs
- PersianCalendar.cs
- Repeater.cs
- WebContext.cs
- GorillaCodec.cs
- CellLabel.cs
- TextParagraphCache.cs
- XamlBrushSerializer.cs
- EditorZone.cs
- SystemInfo.cs
- IgnorePropertiesAttribute.cs
- CategoryList.cs
- KeyFrames.cs
- TileBrush.cs
- IIS7WorkerRequest.cs
- VirtualPathData.cs
- WindowsAuthenticationModule.cs
- BinaryObjectWriter.cs
- BinaryFormatter.cs