Code:
/ DotNET / DotNET / 8.0 / untmp / whidbey / REDBITS / ndp / clr / src / BCL / System / IO / UnmanagedMemoryStreamWrapper.cs / 1 / UnmanagedMemoryStreamWrapper.cs
// ==++== // // Copyright (c) Microsoft Corporation. All rights reserved. // // ==--== /*============================================================ ** ** Class: UnmanagedMemoryStreamWrapper ** ** Purpose: Create a Memorystream over an UnmanagedMemoryStream ** ===========================================================*/ using System; using System.Runtime.InteropServices; using System.Security.Permissions; namespace System.IO { // Needed for backwards compatibility with V1.x usages of the // ResourceManager, where a MemoryStream is now returned as an // UnmanagedMemoryStream from ResourceReader. internal sealed class UnmanagedMemoryStreamWrapper : MemoryStream { private UnmanagedMemoryStream _unmanagedStream; internal UnmanagedMemoryStreamWrapper(UnmanagedMemoryStream stream) { _unmanagedStream = stream; } public override bool CanRead { get { return _unmanagedStream.CanRead; } } public override bool CanSeek { get { return _unmanagedStream.CanSeek; } } public override bool CanWrite { get { return _unmanagedStream.CanWrite; } } protected override void Dispose(bool disposing) { try { if (disposing) _unmanagedStream.Close(); } finally { base.Dispose(disposing); } } public override void Flush() { _unmanagedStream.Flush(); } public override byte[] GetBuffer() { throw new UnauthorizedAccessException(Environment.GetResourceString("UnauthorizedAccess_MemStreamBuffer")); } public override int Capacity { get { return (int) _unmanagedStream.Capacity; } set { throw new IOException(Environment.GetResourceString("IO.IO_FixedCapacity")); } } public override long Length { get { return _unmanagedStream.Length; } } public override long Position { get { return _unmanagedStream.Position; } set { _unmanagedStream.Position = value; } } public override int Read([In, Out] byte[] buffer, int offset, int count) { return _unmanagedStream.Read(buffer, offset, count); } public override int ReadByte() { return _unmanagedStream.ReadByte(); } public override long Seek(long offset, SeekOrigin loc) { return _unmanagedStream.Seek(offset, loc); } public unsafe override byte[] ToArray() { if (!_unmanagedStream._isOpen) __Error.StreamIsClosed(); if (!_unmanagedStream.CanRead) __Error.ReadNotSupported(); byte[] buffer = new byte[_unmanagedStream.Length]; Buffer.memcpy(_unmanagedStream.Pointer, 0, buffer, 0, (int) _unmanagedStream.Length); return buffer; } public override void Write(byte[] buffer, int offset, int count) { _unmanagedStream.Write(buffer, offset, count); } public override void WriteByte(byte value) { _unmanagedStream.WriteByte(value); } // Writes this MemoryStream to another stream. public unsafe override void WriteTo(Stream stream) { if (!_unmanagedStream._isOpen) __Error.StreamIsClosed(); if (!_unmanagedStream.CanRead) __Error.ReadNotSupported(); if (stream==null) throw new ArgumentNullException("stream", Environment.GetResourceString("ArgumentNull_Stream")); byte[] buffer = ToArray(); stream.Write(buffer, 0, buffer.Length); } } }
Link Menu
This book is available now!
Buy at Amazon US or
Buy at Amazon UK
- QilPatternVisitor.cs
- MobileListItemCollection.cs
- RelationshipDetailsRow.cs
- CfgRule.cs
- errorpatternmatcher.cs
- Classification.cs
- StrokeCollectionDefaultValueFactory.cs
- BitmapMetadata.cs
- PipelineModuleStepContainer.cs
- ClientScriptItem.cs
- OperationPickerDialog.cs
- PageParser.cs
- ToolStripComboBox.cs
- QueryResultOp.cs
- Point4DValueSerializer.cs
- DataGridViewAdvancedBorderStyle.cs
- HttpGetClientProtocol.cs
- SyncMethodInvoker.cs
- Clause.cs
- QilExpression.cs
- TypeValidationEventArgs.cs
- MenuItem.cs
- ToolStripSeparator.cs
- ServerTooBusyException.cs
- PropertyMetadata.cs
- WizardPanel.cs
- ReferenceEqualityComparer.cs
- WebPartManager.cs
- AccessText.cs
- Bookmark.cs
- ConfigXmlSignificantWhitespace.cs
- HyperLinkStyle.cs
- SQLGuidStorage.cs
- TreeView.cs
- Pts.cs
- DefaultClaimSet.cs
- FirstMatchCodeGroup.cs
- GridPatternIdentifiers.cs
- TableCellsCollectionEditor.cs
- SafeCoTaskMem.cs
- FieldInfo.cs
- ConfigXmlDocument.cs
- MenuItemAutomationPeer.cs
- TextServicesDisplayAttributePropertyRanges.cs
- QueryContinueDragEventArgs.cs
- FrameworkPropertyMetadata.cs
- IdentityReference.cs
- DependencyPropertyConverter.cs
- WebHttpElement.cs
- SQLMembershipProvider.cs
- DownloadProgressEventArgs.cs
- RegistrationServices.cs
- DefaultExpression.cs
- HwndMouseInputProvider.cs
- Span.cs
- GenericParameterDataContract.cs
- DataGridViewComboBoxEditingControl.cs
- StickyNoteAnnotations.cs
- WebServiceReceive.cs
- TypeNameConverter.cs
- ServiceBusyException.cs
- NavigationWindowAutomationPeer.cs
- DefaultPropertiesToSend.cs
- RemotingServices.cs
- Journaling.cs
- OdbcErrorCollection.cs
- LinkUtilities.cs
- ConfigXmlWhitespace.cs
- DesignerTextWriter.cs
- unitconverter.cs
- CopyAttributesAction.cs
- UserControlAutomationPeer.cs
- XPathAncestorQuery.cs
- PaintValueEventArgs.cs
- DropShadowBitmapEffect.cs
- InvalidDataException.cs
- ArgumentNullException.cs
- TextEncodedRawTextWriter.cs
- CaretElement.cs
- TransformerInfo.cs
- StylusPointPropertyUnit.cs
- ToolStripMenuItemDesigner.cs
- ProxyWebPartManager.cs
- WindowVisualStateTracker.cs
- TrustVersion.cs
- OutputScopeManager.cs
- BreakRecordTable.cs
- Int64.cs
- EntityContainerAssociationSet.cs
- RenderDataDrawingContext.cs
- QilLiteral.cs
- DbConnectionInternal.cs
- BitVector32.cs
- SafeNativeMethodsCLR.cs
- NavigationWindow.cs
- XmlReader.cs
- StructuralCache.cs
- COM2PropertyBuilderUITypeEditor.cs
- Iis7Helper.cs
- UnaryNode.cs