Code:
/ FX-1434 / FX-1434 / 1.0 / untmp / whidbey / REDBITS / ndp / clr / src / BCL / System / Reflection / Emit / UnmanagedMarshal.cs / 1 / UnmanagedMarshal.cs
// ==++== // // Copyright (c) Microsoft Corporation. All rights reserved. // // ==--== namespace System.Reflection.Emit { using System.Runtime.InteropServices; using System; using System.Security.Permissions; // This class is describing the fieldmarshal. [Serializable()] [HostProtection(MayLeakOnAbort = true)] [System.Runtime.InteropServices.ComVisible(true)] [Obsolete("An alternate API is available: Emit the MarshalAs custom attribute instead. http://go.microsoft.com/fwlink/?linkid=14202")] public sealed class UnmanagedMarshal { /****************************** [System.Runtime.InteropServices.ComVisible(true)] * public static constructors. You can only construct * UnmanagedMarshal using these static constructors. ******************************/ public static UnmanagedMarshal DefineUnmanagedMarshal(UnmanagedType unmanagedType) { if (unmanagedType == UnmanagedType.ByValTStr || #if FEATURE_COMINTEROP unmanagedType == UnmanagedType.SafeArray || #endif //FEATURE_COMINTEROP unmanagedType == UnmanagedType.ByValArray || unmanagedType == UnmanagedType.LPArray || unmanagedType == UnmanagedType.CustomMarshaler) { // not a simple native marshal throw new ArgumentException(Environment.GetResourceString("Argument_NotASimpleNativeType")); } return new UnmanagedMarshal(unmanagedType, Guid.Empty, 0, (UnmanagedType) 0); } public static UnmanagedMarshal DefineByValTStr(int elemCount) { return new UnmanagedMarshal(UnmanagedType.ByValTStr, Guid.Empty, elemCount, (UnmanagedType) 0); } #if FEATURE_COMINTEROP public static UnmanagedMarshal DefineSafeArray(UnmanagedType elemType) { return new UnmanagedMarshal(UnmanagedType.SafeArray, Guid.Empty, 0, elemType); } #endif //FEATURE_COMINTEROP public static UnmanagedMarshal DefineByValArray(int elemCount) { return new UnmanagedMarshal(UnmanagedType.ByValArray, Guid.Empty, elemCount, (UnmanagedType) 0); } public static UnmanagedMarshal DefineLPArray(UnmanagedType elemType) { return new UnmanagedMarshal(UnmanagedType.LPArray, Guid.Empty, 0, elemType); } // accessor function for the native type public UnmanagedType GetUnmanagedType { get { return m_unmanagedType; } } public Guid IIDGuid { get { if (m_unmanagedType != UnmanagedType.CustomMarshaler) { // throw exception here. There is Guid only if CustomMarshaler throw new ArgumentException(Environment.GetResourceString("Argument_NotACustomMarshaler")); } return m_guid; } } public int ElementCount { get { if (m_unmanagedType != UnmanagedType.ByValArray && m_unmanagedType != UnmanagedType.ByValTStr) { // throw exception here. There is NumElement only if NativeTypeFixedArray throw new ArgumentException(Environment.GetResourceString("Argument_NoUnmanagedElementCount")); } return m_numElem; } } public UnmanagedType BaseType { get { #if FEATURE_COMINTEROP if (m_unmanagedType != UnmanagedType.LPArray && m_unmanagedType != UnmanagedType.SafeArray) #else if (m_unmanagedType != UnmanagedType.LPArray) #endif //!FEATURE_COMINTEROP { // throw exception here. There is NestedUnmanagedType only if LPArray or SafeArray throw new ArgumentException(Environment.GetResourceString("Argument_NoNestedMarshal")); } return m_baseType; } } private UnmanagedMarshal(UnmanagedType unmanagedType, Guid guid, int numElem, UnmanagedType type) { m_unmanagedType = unmanagedType; m_guid = guid; m_numElem = numElem; m_baseType = type; } /************************ * * Data member * *************************/ internal UnmanagedType m_unmanagedType; internal Guid m_guid; internal int m_numElem; internal UnmanagedType m_baseType; /************************ * this function return the byte representation of the marshal info. *************************/ internal byte[] InternalGetBytes() { byte[] buf; #if FEATURE_COMINTEROP if (m_unmanagedType == UnmanagedType.SafeArray || m_unmanagedType == UnmanagedType.LPArray) #else if (m_unmanagedType == UnmanagedType.LPArray) #endif //!FEATURE_COMINTEROP { // syntax for NativeTypeSafeArray is //// int cBuf = 2; buf = new byte[cBuf]; buf[0] = (byte) (m_unmanagedType); buf[1] = (byte) (m_baseType); return buf; } else if (m_unmanagedType == UnmanagedType.ByValArray || m_unmanagedType == UnmanagedType.ByValTStr) { // // int cBuf; int iBuf = 0; if (m_numElem <= 0x7f) cBuf = 1; else if (m_numElem <= 0x3FFF) cBuf = 2; else cBuf = 4; // the total buffer size is the one byte + encoded integer size cBuf = cBuf + 1; buf = new byte[cBuf]; buf[iBuf++] = (byte) (m_unmanagedType); if (m_numElem <= 0x7F) { buf[iBuf++] = (byte)(m_numElem & 0xFF); } else if (m_numElem <= 0x3FFF) { buf[iBuf++] = (byte)((m_numElem >> 8) | 0x80); buf[iBuf++] = (byte)(m_numElem & 0xFF); } else if (m_numElem <= 0x1FFFFFFF) { buf[iBuf++] = (byte)((m_numElem >> 24) | 0xC0); buf[iBuf++] = (byte)((m_numElem >> 16) & 0xFF); buf[iBuf++] = (byte)((m_numElem >> 8) & 0xFF); buf[iBuf++] = (byte)((m_numElem) & 0xFF); } return buf; } buf = new byte[1]; buf[0] = (byte) (m_unmanagedType); return buf; } } }
Link Menu

This book is available now!
Buy at Amazon US or
Buy at Amazon UK
- _FixedSizeReader.cs
- AppDomainFactory.cs
- PathFigureCollectionConverter.cs
- IndexedString.cs
- DataAdapter.cs
- Interlocked.cs
- WSSecurityJan2004.cs
- StringAnimationUsingKeyFrames.cs
- ConfigurationLocationCollection.cs
- FixedElement.cs
- SecurityTokenInclusionMode.cs
- HttpModuleActionCollection.cs
- SoapFault.cs
- EventMappingSettingsCollection.cs
- SecurityPolicySection.cs
- CardSpaceShim.cs
- InvalidFilterCriteriaException.cs
- FileDialog.cs
- RichTextBox.cs
- ProcessProtocolHandler.cs
- OleDbInfoMessageEvent.cs
- XmlBufferedByteStreamReader.cs
- WindowsSolidBrush.cs
- ComUdtElementCollection.cs
- RegexGroup.cs
- HtmlTableRow.cs
- ListChangedEventArgs.cs
- XmlSchemaAppInfo.cs
- OutputWindow.cs
- RootProjectionNode.cs
- RightsManagementEncryptedStream.cs
- VisualTarget.cs
- LineVisual.cs
- EdmFunctionAttribute.cs
- ImageIndexEditor.cs
- FontWeightConverter.cs
- ThreadInterruptedException.cs
- XmlReflectionImporter.cs
- EventWaitHandle.cs
- DelegateHelpers.Generated.cs
- httpserverutility.cs
- TreeChangeInfo.cs
- DecodeHelper.cs
- DataGridViewCellStyle.cs
- DataSourceView.cs
- COM2PropertyDescriptor.cs
- MemberCollection.cs
- SetterBase.cs
- CommandManager.cs
- StyleTypedPropertyAttribute.cs
- SoapException.cs
- DESCryptoServiceProvider.cs
- TCEAdapterGenerator.cs
- DayRenderEvent.cs
- JumpItem.cs
- CanExecuteRoutedEventArgs.cs
- MemberPath.cs
- ClientFormsAuthenticationCredentials.cs
- AssociationSetMetadata.cs
- ReferenceTypeElement.cs
- RectAnimationBase.cs
- Message.cs
- HierarchicalDataTemplate.cs
- PrintDialog.cs
- ToolStripPanelCell.cs
- NaturalLanguageHyphenator.cs
- SourceFileBuildProvider.cs
- Utils.cs
- Light.cs
- ListViewAutomationPeer.cs
- GlyphInfoList.cs
- DesignerActionVerbList.cs
- ChooseAction.cs
- MediaCommands.cs
- BindingSource.cs
- InvalidEnumArgumentException.cs
- FormViewAutoFormat.cs
- _FixedSizeReader.cs
- CodeParameterDeclarationExpressionCollection.cs
- Page.cs
- ToggleProviderWrapper.cs
- Tokenizer.cs
- WizardDesigner.cs
- InvalidDataException.cs
- SafeNativeMethods.cs
- DisplayNameAttribute.cs
- File.cs
- DocumentReferenceCollection.cs
- CounterSetInstance.cs
- SimpleExpression.cs
- SimpleRecyclingCache.cs
- XmlSchemaAll.cs
- ResourceAssociationSet.cs
- IPHostEntry.cs
- FontFamilyValueSerializer.cs
- ResolveResponseInfo.cs
- DeflateStreamAsyncResult.cs
- XmlHierarchyData.cs
- securestring.cs
- C14NUtil.cs