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The Labs \ Source Viewer \ SSCLI \ System.Security.Policy \ ApplicationDirectory

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. // ApplicationDirectory.cs
  16. //
  17. // ApplicationDirectory is an evidence type representing the directory the assembly
  18. // was loaded from.
  19. //
  21. namespace System.Security.Policy
  22. {
  23.    
  24.     using System;
  25.     using System.IO;
  26.     using System.Security.Util;
  27.     using System.Collections;
  28.    
  29.     [Serializable()]
  30.     [System.Runtime.InteropServices.ComVisible(true)]
  31.     public sealed class ApplicationDirectory : IBuiltInEvidence
  32.     {
  33.         private URLString m_appDirectory;
  34.        
  35.         internal ApplicationDirectory()
  36.         {
  37.             m_appDirectory = null;
  38.         }
  39.        
  40.         public ApplicationDirectory(string name)
  41.         {
  42.             if (name == null)
  43.                 throw new ArgumentNullException("name");
  44.            
  45.             m_appDirectory = new URLString(name);
  46.         }
  47.        
  48.         public string Directory {
  49.             get { return m_appDirectory.ToString(); }
  50.         }
  51.        
  52.         public override bool Equals(object o)
  53.         {
  54.             if (o == null)
  55.                 return false;
  56.            
  57.             if (o is ApplicationDirectory) {
  58.                 ApplicationDirectory appDir = (ApplicationDirectory)o;
  59.                
  60.                 if (this.m_appDirectory == null) {
  61.                     return appDir.m_appDirectory == null;
  62.                 }
  63.                 else if (appDir.m_appDirectory == null) {
  64.                     return false;
  65.                 }
  66.                 else {
  67.                     return this.m_appDirectory.IsSubsetOf(appDir.m_appDirectory) && appDir.m_appDirectory.IsSubsetOf(this.m_appDirectory);
  68.                 }
  69.             }
  70.             return false;
  71.         }
  72.        
  73.         public override int GetHashCode()
  74.         {
  75.             return this.Directory.GetHashCode();
  76.         }
  77.        
  78.         public object Copy()
  79.         {
  80.             ApplicationDirectory appDir = new ApplicationDirectory();
  81.            
  82.             appDir.m_appDirectory = this.m_appDirectory;
  83.            
  84.             return appDir;
  85.         }
  86.        
  87.         internal SecurityElement ToXml()
  88.         {
  89.             SecurityElement root = new SecurityElement("System.Security.Policy.ApplicationDirectory");
  90.             // If you hit this assert then most likely you are trying to change the name of this class.
  91.             // This is ok as long as you change the hard coded string above and change the assert below.
  92.             BCLDebug.Assert(this.GetType().FullName.Equals("System.Security.Policy.ApplicationDirectory"), "Class name changed!");
  93.            
  94.             root.AddAttribute("version", "1");
  95.            
  96.             if (m_appDirectory != null)
  97.                 root.AddChild(new SecurityElement("Directory", m_appDirectory.ToString()));
  98.            
  99.             return root;
  100.         }
  101.        
  102.         /// <internalonly/>
  103.         int IBuiltInEvidence.OutputToBuffer(char[] buffer, int position, bool verbose)
  104.         {
  105.             buffer[position++] = BuiltInEvidenceHelper.idApplicationDirectory;
  106.             string directory = this.Directory;
  107.             int length = directory.Length;
  108.            
  109.             if (verbose) {
  110.                 BuiltInEvidenceHelper.CopyIntToCharArray(length, buffer, position);
  111.                 position += 2;
  112.             }
  113.             directory.CopyTo(0, buffer, position, length);
  114.             return length + position;
  115.         }
  116.        
  117.         /// <internalonly/>
  118.         int IBuiltInEvidence.InitFromBuffer(char[] buffer, int position)
  119.         {
  120.             int length = BuiltInEvidenceHelper.GetIntFromCharArray(buffer, position);
  121.             position += 2;
  122.            
  123.             m_appDirectory = new URLString(new string(buffer, position, length));
  124.            
  125.             return position + length;
  126.         }
  127.        
  128.         /// <internalonly/>
  129.         int IBuiltInEvidence.GetRequiredSize(bool verbose)
  130.         {
  131.             if (verbose)
  132.                 return this.Directory.Length + 3;
  133.             else
  134.                 // Directory + identifier + length
  135.                 return this.Directory.Length + 1;
  136.             // Directory + identifier
  137.         }
  138.        
  139.         public override string ToString()
  140.         {
  141.             return ToXml().ToString();
  142.         }
  143.     }
  144. }

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