LogSwitch.cs source code in C# .NET

                        Code:
                         / FXUpdate3074 / FXUpdate3074 / 1.1 / untmp / whidbey / QFE / ndp / clr / src / BCL / System / Diagnostics / LogSwitch.cs / 1 / LogSwitch.cs
                        
                        
                            // ==++== 
//
//   Copyright (c) Microsoft Corporation.  All rights reserved.
//
// ==--== 
namespace System.Diagnostics {
    using System; 
    using System.IO; 
    using System.Collections;
 
    [Serializable()]
    internal class LogSwitch
    {
      // ! WARNING ! 
      // If any fields are added/deleted/modified, perform the
      // same in the EE code (debugdebugger.cpp) 
      internal String strName; 
      internal String strDescription;
      private LogSwitch ParentSwitch; 
      private LogSwitch[] ChildSwitch;
      internal LoggingLevels iLevel;
      internal LoggingLevels iOldLevel;
      private int iNumChildren; 
      private int iChildArraySize;
 
      // ! END WARNING ! 

 
      private LogSwitch ()
      {
      }
 
      // Constructs a LogSwitch.  A LogSwitch is used to categorize log messages.
      // 
      // All switches (except for the global LogSwitch) have a parent LogSwitch. 
      //
      public LogSwitch(String name, String description, LogSwitch parent) 
      {
         if ((name != null) && (parent != null) )
         {
            if (name.Length == 0) 
               throw new ArgumentOutOfRangeException ("Name", Environment.GetResourceString("Argument_StringZeroLength"));
 
            strName = name; 
            strDescription = description;
            iLevel = LoggingLevels.ErrorLevel; 
            iOldLevel = iLevel;

            // update the parent switch to reflect this child switch
            parent.AddChildSwitch (this); 

            ParentSwitch = parent; 
 
            ChildSwitch  = null;
            iNumChildren = 0; 
            iChildArraySize = 0;

            Log.m_Hashtable.Add (strName, this);
 
            // Call into the EE to let it know about the creation of
            // this switch 
            Log.AddLogSwitch (this); 

            // update switch count 
            Log.iNumOfSwitches++;
         }
         else
            throw new ArgumentNullException ((name==null ? "name" : "parent")); 
      }
 
      internal LogSwitch(String name, String description) 
      {
         strName = name; 
         strDescription = description;
         iLevel = LoggingLevels.ErrorLevel;
         iOldLevel = iLevel;
         ParentSwitch = null; 
         ChildSwitch  = null;
         iNumChildren = 0; 
         iChildArraySize = 0; 

         Log.m_Hashtable.Add (strName, this); 

         // Call into the EE to let it know about the creation of
         // this switch
         Log.AddLogSwitch (this); 

         // update switch count 
         Log.iNumOfSwitches++; 
      }
 

      // Get property returns the name of the switch
      public virtual String Name
      { 
         get { return strName;}
      } 
 
      // Get property returns the description of the switch
      public virtual String Description 
      {
         get {return strDescription;}
      }
 

      // Get property returns the parent of the switch 
      public virtual LogSwitch Parent 
      {
         get { return ParentSwitch; } 
      }


      // Property to Get/Set the level of log messages which are "on" for the switch. 
      //
      public  virtual LoggingLevels  MinimumLevel 
      { 
         get { return iLevel; }
         set 
         {
            iLevel = value;
            iOldLevel = value;
            String strParentName = ParentSwitch!=null ? ParentSwitch.Name : ""; 
            if (Debugger.IsAttached)
               Log.ModifyLogSwitch ((int)iLevel, strName, strParentName); 
 
            Log.InvokeLogSwitchLevelHandlers (this, iLevel);
         } 
      }


      // Checks if the given level is "on" for this switch or one of its parents. 
      //
      public virtual bool CheckLevel(LoggingLevels level) 
      { 
         if (iLevel > level)
         { 
            // recurse through the list till parent is hit.
            if (this.ParentSwitch == null)
               return false;
            else 
               return this.ParentSwitch.CheckLevel (level);
         } 
         else 
            return true;
      } 


      // Returns a switch with the particular name, if any.  Returns null if no
      // such switch exists. 
      public static LogSwitch GetSwitch(String name)
      { 
         return (LogSwitch) Log.m_Hashtable[name]; 
      }
 
      private  void AddChildSwitch (LogSwitch child)
      {
         if (iChildArraySize <= iNumChildren)
         { 
               int iIncreasedSize;
 
               if (iChildArraySize == 0) 
                  iIncreasedSize = 10;
               else 
                  iIncreasedSize = (iChildArraySize * 3) / 2;

               // increase child array size in chunks of 4
               LogSwitch[] newChildSwitchArray = new LogSwitch [iIncreasedSize]; 

               // copy the old array objects into the new one. 
                  if (iNumChildren > 0) 
                  Array.Copy(ChildSwitch, newChildSwitchArray, iNumChildren);
 
               iChildArraySize = iIncreasedSize;

                 ChildSwitch = newChildSwitchArray;
         } 

         ChildSwitch [iNumChildren++] = child; 
      } 

 
    }
}

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.
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LogSwitch.cs source code in C# .NET

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