Code:
/ FX-1434 / FX-1434 / 1.0 / 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
- DataGridViewButtonCell.cs
- CultureInfoConverter.cs
- MergablePropertyAttribute.cs
- TripleDES.cs
- SecurityPolicySection.cs
- ToolStripLocationCancelEventArgs.cs
- TextCompositionEventArgs.cs
- ChangeBlockUndoRecord.cs
- ListItemCollection.cs
- PreDigestedSignedInfo.cs
- WebControlsSection.cs
- SchemaMapping.cs
- LOSFormatter.cs
- DataTablePropertyDescriptor.cs
- IdleTimeoutMonitor.cs
- HttpPostClientProtocol.cs
- oledbmetadatacolumnnames.cs
- ExcludeFromCodeCoverageAttribute.cs
- OverrideMode.cs
- NavigationHelper.cs
- WebPartPersonalization.cs
- ScriptingRoleServiceSection.cs
- ScriptResourceAttribute.cs
- ToolStripButton.cs
- PermissionSet.cs
- InputManager.cs
- AssemblyInfo.cs
- BrowserInteropHelper.cs
- NotSupportedException.cs
- UrlAuthFailedErrorFormatter.cs
- ReadOnlyDataSource.cs
- unsafeIndexingFilterStream.cs
- ScrollViewer.cs
- BuildProvider.cs
- ActivityValidator.cs
- ModifierKeysValueSerializer.cs
- StringConcat.cs
- PaperSize.cs
- TemplatedAdorner.cs
- SerializationSectionGroup.cs
- UpdateProgress.cs
- GACMembershipCondition.cs
- SettingsPropertyNotFoundException.cs
- DataFormat.cs
- WebBrowserUriTypeConverter.cs
- NTAccount.cs
- DragEventArgs.cs
- CacheForPrimitiveTypes.cs
- DependencyPropertyDescriptor.cs
- CultureInfoConverter.cs
- GeneralEndpointIdentity.cs
- FtpWebRequest.cs
- SqlConnectionStringBuilder.cs
- ToolStripDropDownClosedEventArgs.cs
- SqlWebEventProvider.cs
- Point4D.cs
- SymbolEqualComparer.cs
- MouseGestureValueSerializer.cs
- MenuItemStyleCollection.cs
- ServiceDescriptionData.cs
- EdgeModeValidation.cs
- TableAutomationPeer.cs
- ProtocolsSection.cs
- UnmanagedMarshal.cs
- HelpKeywordAttribute.cs
- NullReferenceException.cs
- CheckBoxPopupAdapter.cs
- PageRanges.cs
- GeneralTransformGroup.cs
- SequentialUshortCollection.cs
- XsltException.cs
- OuterProxyWrapper.cs
- ResourcePermissionBaseEntry.cs
- MiniAssembly.cs
- XPathAxisIterator.cs
- DBCommand.cs
- VersionedStream.cs
- XmlStreamStore.cs
- WebPartExportVerb.cs
- RenderTargetBitmap.cs
- BinaryObjectInfo.cs
- UnmanagedBitmapWrapper.cs
- ICspAsymmetricAlgorithm.cs
- CodeAttributeDeclaration.cs
- MenuItemCollection.cs
- DateTimeUtil.cs
- GlyphingCache.cs
- Literal.cs
- Brushes.cs
- SID.cs
- ErrorBehavior.cs
- RangeValidator.cs
- IpcManager.cs
- HttpPostedFile.cs
- CTreeGenerator.cs
- SqlDependencyListener.cs
- IsolatedStorageSecurityState.cs
- ViewManager.cs
- Bitmap.cs
- Sql8ConformanceChecker.cs