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The Labs \ Source Viewer \ SSCLI \ System.Reflection.Emit \ LocalBuilder

SSCLI
  1. // ==++==
  2. //
  3. //
  4. // Copyright (c) 2006 Microsoft Corporation. All rights reserved.
  5. //
  6. // The use and distribution terms for this software are contained in the file
  7. // named license.txt, which can be found in the root of this distribution.
  8. // By using this software in any fashion, you are agreeing to be bound by the
  9. // terms of this license.
  10. //
  11. // You must not remove this notice, or any other, from this software.
  12. //
  13. //
  14. // ==--==
  15. using System;
  16. using System.Reflection;
  17. using System.Security.Permissions;
  18. using System.Runtime.InteropServices;
  20. namespace System.Reflection.Emit
  21. {
  22.     [ClassInterface(ClassInterfaceType.None)]
  23.     [ComDefaultInterface(typeof(_LocalBuilder))]
  24.     [System.Runtime.InteropServices.ComVisible(true)]
  25.     public sealed class LocalBuilder : LocalVariableInfo, _LocalBuilder
  26.     {
  27.         #region Private Data Members
  28.         private int m_localIndex;
  29.         private Type m_localType;
  30.         private MethodInfo m_methodBuilder;
  31.         private bool m_isPinned;
  32.         #endregion
  33.        
  34.         #region Constructor
  35.         private LocalBuilder()
  36.         {
  37.         }
  38.         internal LocalBuilder(int localIndex, Type localType, MethodInfo methodBuilder) : this(localIndex, localType, methodBuilder, false)
  39.         {
  40.         }
  41.         internal LocalBuilder(int localIndex, Type localType, MethodInfo methodBuilder, bool isPinned)
  42.         {
  43.             m_isPinned = isPinned;
  44.             m_localIndex = localIndex;
  45.             m_localType = localType;
  46.             m_methodBuilder = methodBuilder;
  47.         }
  48.         #endregion
  49.        
  50.         #region Internal Members
  51.         internal int GetLocalIndex()
  52.         {
  53.             return m_localIndex;
  54.         }
  55.         internal MethodInfo GetMethodBuilder()
  56.         {
  57.             return m_methodBuilder;
  58.         }
  59.         #endregion
  60.        
  61.         #region LocalVariableInfo Override
  62.         public override bool IsPinned {
  63.             get { return m_isPinned; }
  64.         }
  65.         public override Type LocalType {
  66.             get { return m_localType; }
  67.         }
  68.         public override int LocalIndex {
  69.             get { return m_localIndex; }
  70.         }
  71.         #endregion
  72.        
  73.         #region Public Members
  74.         public void SetLocalSymInfo(string name)
  75.         {
  76.             SetLocalSymInfo(name, 0, 0);
  77.         }
  78.         public void SetLocalSymInfo(string name, int startOffset, int endOffset)
  79.         {
  80.             ModuleBuilder dynMod;
  81.             SignatureHelper sigHelp;
  82.             int sigLength;
  83.             byte[] signature;
  84.             byte[] mungedSig;
  85.             int index;
  86.            
  87.             MethodBuilder methodBuilder = m_methodBuilder as MethodBuilder;
  88.             if (methodBuilder == null)
  89.                 // it's a light code gen entity
  90.                 throw new NotSupportedException();
  91.             dynMod = (ModuleBuilder)methodBuilder.Module;
  92.             if (methodBuilder.IsTypeCreated()) {
  93.                 // cannot change method after its containing type has been created
  94.                 throw new InvalidOperationException(Environment.GetResourceString("InvalidOperation_TypeHasBeenCreated"));
  95.             }
  96.            
  97.             // set the name and range of offset for the local
  98.             if (dynMod.GetSymWriter() == null) {
  99.                 // cannot set local name if not debug module
  100.                 throw new InvalidOperationException(Environment.GetResourceString("InvalidOperation_NotADebugModule"));
  101.             }
  102.            
  103.             sigHelp = SignatureHelper.GetFieldSigHelper(dynMod);
  104.             sigHelp.AddArgument(m_localType);
  105.             signature = sigHelp.InternalGetSignature(out sigLength);
  106.            
  107.             // The symbol store doesn't want the calling convention on the
  108.             // front of the signature, but InternalGetSignature returns
  109.             // the callinging convention. So we strip it off. This is a
  110.             // bit unfortunate, since it means that we need to allocate
  111.             // yet another array of bytes...
  112.             mungedSig = new byte[sigLength - 1];
  113.             Array.Copy(signature, 1, mungedSig, 0, sigLength - 1);
  114.            
  115.             index = methodBuilder.GetILGenerator().m_ScopeTree.GetCurrentActiveScopeIndex();
  116.             if (index == -1) {
  117.                 // top level scope information is kept with methodBuilder
  118.                 methodBuilder.m_localSymInfo.AddLocalSymInfo(name, mungedSig, m_localIndex, startOffset, endOffset);
  119.             }
  120.             else {
  121.                 methodBuilder.GetILGenerator().m_ScopeTree.AddLocalSymInfoToCurrentScope(name, mungedSig, m_localIndex, startOffset, endOffset);
  122.             }
  123.         }
  124.         #endregion
  125.        
  126.         void _LocalBuilder.GetTypeInfoCount(out uint pcTInfo)
  127.         {
  128.             throw new NotImplementedException();
  129.         }
  130.        
  131.         void _LocalBuilder.GetTypeInfo(uint iTInfo, uint lcid, IntPtr ppTInfo)
  132.         {
  133.             throw new NotImplementedException();
  134.         }
  135.        
  136.         void _LocalBuilder.GetIDsOfNames(        [In()]
  137. ref Guid riid, IntPtr rgszNames, uint cNames, uint lcid, IntPtr rgDispId)
  138.         {
  139.             throw new NotImplementedException();
  140.         }
  141.        
  142.         void _LocalBuilder.Invoke(uint dispIdMember,         [In()]
  143. ref Guid riid, uint lcid, short wFlags, IntPtr pDispParams, IntPtr pVarResult, IntPtr pExcepInfo, IntPtr puArgErr)
  144.         {
  145.             throw new NotImplementedException();
  146.         }
  147.     }
  148. }

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