Assert.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / DotNET / DotNET / 8.0 / untmp / whidbey / REDBITS / ndp / clr / src / BCL / System / Diagnostics / Assert.cs / 1 / Assert.cs
                        

                        
                            // ==++== 
//
//   Copyright (c) Microsoft Corporation.  All rights reserved.
//
// ==--== 
namespace System.Diagnostics {
    using System; 
    using System.Security.Permissions; 
    using System.IO;
    using System.Reflection; 
    using System.Runtime.CompilerServices;
    // Class which handles code asserts.  Asserts are used to explicitly protect
    // assumptions made in the code.  In general if an assert fails, it indicates
    // a program bug so is immediately called to the attention of the user. 
 	// Only static data members, does not need to be marked with the serializable attribute
    internal static class Assert 
    { 
        private static AssertFilter[] ListOfFilters;
        private static int iNumOfFilters; 
        private static int iFilterArraySize;

        static Assert()
        { 
            Assert.AddFilter(new DefaultFilter());
        } 
 
    	// AddFilter adds a new assert filter. This replaces the current
    	// filter, unless the filter returns FailContinue. 
    	//
    	public static void AddFilter(AssertFilter filter)
    	{
    		if (iFilterArraySize <= iNumOfFilters) 
    		{
    				AssertFilter[] newFilterArray = new AssertFilter [iFilterArraySize+2]; 
 
    	            if (iNumOfFilters > 0)
    					Array.Copy(ListOfFilters, newFilterArray, iNumOfFilters); 

    				iFilterArraySize += 2;

    		        ListOfFilters = newFilterArray; 
    		}
 
    		ListOfFilters [iNumOfFilters++] = filter;			 
    	}
 
    	// Called when an assertion is being made.
    	//
    	public static void Check(bool condition, String conditionString, String message)
    	{ 
    		if (!condition)
    		{ 
    			Fail (conditionString, message); 
    		}
    	} 


    	public static void Fail(String conditionString, String message)
    	{ 
    		// get the stacktrace
    		StackTrace st = new StackTrace(); 
 
    		// Run through the list of filters backwards (the last filter in the list
    		// is the default filter. So we're guaranteed that there will be atleast 
    		// one filter to handle the assert.

    		int iTemp = iNumOfFilters;
    		while (iTemp > 0) 
    		{
 
    			AssertFilters iResult = ListOfFilters [--iTemp].AssertFailure (conditionString, message, st); 

    			if (iResult == AssertFilters.FailDebug) 
    			{
    				if (Debugger.IsAttached == true)
    					Debugger.Break();
    				else 
    				{
    					if (Debugger.Launch() == false) 
    					{ 
    						throw new InvalidOperationException(
    								Environment.GetResourceString("InvalidOperation_DebuggerLaunchFailed")); 
    					}						
    				}

    				break; 
    			}
    			else if (iResult == AssertFilters.FailTerminate) 
    				Environment.Exit(-1); 
    			else if (iResult == AssertFilters.FailIgnore)
    				break; 

    			// If none of the above, it means that the Filter returned FailContinue.
    			// So invoke the next filter.
    		} 

    	} 
 
      // Called when an assert happens.
      // 
      [MethodImplAttribute(MethodImplOptions.InternalCall)]
      public extern static int ShowDefaultAssertDialog(String conditionString, String message);
    }
}

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