Code:
/ 4.0 / 4.0 / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / clr / src / BCL / System / IO / UnmanagedMemoryStreamWrapper.cs / 1305376 / 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; using System.Diagnostics.Contracts; 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 { [Pure] get { return _unmanagedStream.CanRead; } } public override bool CanSeek { [Pure] get { return _unmanagedStream.CanSeek; } } public override bool CanWrite { [Pure] 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); } [System.Security.SecuritySafeCritical] // auto-generated 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 (stream==null) throw new ArgumentNullException("stream", Environment.GetResourceString("ArgumentNull_Stream")); Contract.EndContractBlock(); if (!_unmanagedStream._isOpen) __Error.StreamIsClosed(); if (!CanRead) __Error.ReadNotSupported(); byte[] buffer = ToArray(); stream.Write(buffer, 0, buffer.Length); } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // ==++== // // 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; using System.Diagnostics.Contracts; 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 { [Pure] get { return _unmanagedStream.CanRead; } } public override bool CanSeek { [Pure] get { return _unmanagedStream.CanSeek; } } public override bool CanWrite { [Pure] 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); } [System.Security.SecuritySafeCritical] // auto-generated 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 (stream==null) throw new ArgumentNullException("stream", Environment.GetResourceString("ArgumentNull_Stream")); Contract.EndContractBlock(); if (!_unmanagedStream._isOpen) __Error.StreamIsClosed(); if (!CanRead) __Error.ReadNotSupported(); byte[] buffer = ToArray(); stream.Write(buffer, 0, buffer.Length); } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007.
Link Menu
This book is available now!
Buy at Amazon US or
Buy at Amazon UK
- DateRangeEvent.cs
- DataGridCellClipboardEventArgs.cs
- VisualBasicReference.cs
- BaseDataList.cs
- UInt64Storage.cs
- Helpers.cs
- Membership.cs
- SafeNativeMemoryHandle.cs
- _ChunkParse.cs
- Int64Storage.cs
- DataGridViewRowContextMenuStripNeededEventArgs.cs
- COM2Properties.cs
- ExpandedWrapper.cs
- ValidationVisibilityAttribute.cs
- CodeCommentStatementCollection.cs
- CreateUserWizardAutoFormat.cs
- EventWaitHandle.cs
- RoamingStoreFileUtility.cs
- Activity.cs
- SendKeys.cs
- reliableinputsessionchannel.cs
- PropertyMapper.cs
- ApplicationDirectoryMembershipCondition.cs
- ScriptControl.cs
- DispatcherSynchronizationContext.cs
- DefaultTypeArgumentAttribute.cs
- ContractTypeNameElement.cs
- DPTypeDescriptorContext.cs
- Adorner.cs
- ComponentGlyph.cs
- EdmToObjectNamespaceMap.cs
- BitStack.cs
- StrongNameIdentityPermission.cs
- BaseConfigurationRecord.cs
- ByteArrayHelperWithString.cs
- ISessionStateStore.cs
- GradientStopCollection.cs
- X509CertificateValidator.cs
- DropDownList.cs
- HandledEventArgs.cs
- PersonalizationState.cs
- WebConfigurationManager.cs
- SpecialNameAttribute.cs
- StringUtil.cs
- FontSizeConverter.cs
- DocumentCollection.cs
- WrappedKeySecurityToken.cs
- ValidatorCompatibilityHelper.cs
- StackSpiller.cs
- RC2.cs
- VisualStyleInformation.cs
- CreateDataSourceDialog.cs
- TreeViewAutomationPeer.cs
- FixedLineResult.cs
- DiagnosticTraceSource.cs
- HMACSHA512.cs
- SettingsBase.cs
- GenericPrincipal.cs
- RelationshipManager.cs
- ContainerParagraph.cs
- TextDecorationCollection.cs
- ContainerTracking.cs
- LockedAssemblyCache.cs
- UiaCoreProviderApi.cs
- EditingMode.cs
- RichTextBoxAutomationPeer.cs
- SoapSchemaImporter.cs
- InitiatorSessionSymmetricTransportSecurityProtocol.cs
- TransactionContextValidator.cs
- PasswordBoxAutomationPeer.cs
- MethodCallTranslator.cs
- TextEffectCollection.cs
- MediaElementAutomationPeer.cs
- DoubleAnimation.cs
- LinqDataSourceContextData.cs
- CellLabel.cs
- BuildProviderAppliesToAttribute.cs
- BufferBuilder.cs
- ModelTreeManager.cs
- JoinTreeNode.cs
- CalendarModeChangedEventArgs.cs
- PinnedBufferMemoryStream.cs
- _MultipleConnectAsync.cs
- QilSortKey.cs
- RtType.cs
- Command.cs
- TextDataBindingHandler.cs
- safex509handles.cs
- WorkflowViewElement.cs
- DirectoryNotFoundException.cs
- Rotation3DAnimationUsingKeyFrames.cs
- Win32KeyboardDevice.cs
- WindowsGraphicsWrapper.cs
- DataGridViewRowConverter.cs
- WaitingCursor.cs
- TemplateNodeContextMenu.cs
- ExpressionConverter.cs
- IgnoreFlushAndCloseStream.cs
- ToolStripDropDownClosingEventArgs.cs
- ProgressBarHighlightConverter.cs