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
- SupportsPreviewControlAttribute.cs
- TextElementCollection.cs
- BuildProvider.cs
- StorageEndPropertyMapping.cs
- X509ChainPolicy.cs
- _AutoWebProxyScriptHelper.cs
- ConfigurationLockCollection.cs
- LessThan.cs
- AsymmetricKeyExchangeDeformatter.cs
- XmlWriterSettings.cs
- ApplicationContext.cs
- ReadOnlyTernaryTree.cs
- PageStatePersister.cs
- ArgumentFixer.cs
- GridViewUpdatedEventArgs.cs
- XDeferredAxisSource.cs
- WebServicesDescriptionAttribute.cs
- RecoverInstanceLocksCommand.cs
- SourceElementsCollection.cs
- SymmetricKey.cs
- MultiSelector.cs
- Cursors.cs
- EnumerableWrapperWeakToStrong.cs
- Font.cs
- SafeLocalAllocation.cs
- IsolatedStorageSecurityState.cs
- XPathAncestorQuery.cs
- EdmScalarPropertyAttribute.cs
- CodeDOMUtility.cs
- XLinq.cs
- MarshalByRefObject.cs
- TypeConstant.cs
- ListBindingHelper.cs
- AspProxy.cs
- BroadcastEventHelper.cs
- SystemFonts.cs
- VersionPair.cs
- WindowsGraphicsWrapper.cs
- MimeTypeMapper.cs
- XmlSchemaSimpleTypeRestriction.cs
- EnumType.cs
- DateTimeFormat.cs
- DPTypeDescriptorContext.cs
- SingleStorage.cs
- RepeatButtonAutomationPeer.cs
- PathFigure.cs
- ComAdminWrapper.cs
- XmlILConstructAnalyzer.cs
- StructureChangedEventArgs.cs
- SpotLight.cs
- ParameterCollection.cs
- TextBoxAutoCompleteSourceConverter.cs
- DataGridViewElement.cs
- HttpHandlerActionCollection.cs
- ForEachAction.cs
- SchemaNames.cs
- StatementContext.cs
- ReachSerializer.cs
- DeviceContext.cs
- ProxyManager.cs
- AttributeQuery.cs
- SoapMessage.cs
- Zone.cs
- SequentialActivityDesigner.cs
- ZipFileInfo.cs
- MonitorWrapper.cs
- ContainerParaClient.cs
- LocalTransaction.cs
- SecurityContextSecurityTokenAuthenticator.cs
- CodeIdentifier.cs
- BitmapEncoder.cs
- DataGrid.cs
- MouseButton.cs
- ProfileSettings.cs
- RequestCachePolicy.cs
- RuleInfoComparer.cs
- EdmRelationshipRoleAttribute.cs
- HttpApplication.cs
- EncryptedData.cs
- ApplicationSecurityManager.cs
- DynamicActivityTypeDescriptor.cs
- LinkLabelLinkClickedEvent.cs
- SourceSwitch.cs
- NotificationContext.cs
- TreeBuilder.cs
- securitycriticaldataClass.cs
- WindowsListViewScroll.cs
- XmlNamespaceDeclarationsAttribute.cs
- XmlSchemaComplexContent.cs
- FileUtil.cs
- SqlConnectionPoolProviderInfo.cs
- ContentPathSegment.cs
- EventLogEntry.cs
- DomainUpDown.cs
- AspProxy.cs
- ZoneMembershipCondition.cs
- UrlAuthorizationModule.cs
- ProfileServiceManager.cs
- CompositeCollection.cs
- DataProtection.cs