Simplified MimeParser/MimeReader.GetOffset()

This doesn't need to check position < 0, that can never happen.

Author: jstedfast

MimeKit/MimeParser.cs

@@ -31,6 +31,7 @@
 using System.Diagnostics;
 using System.Collections;
 using System.Collections.Generic;
+using System.Runtime.CompilerServices;
 
 using MimeKit.IO;
 using MimeKit.Utils;
@@ -665,11 +666,9 @@ int ReadAhead (int atleast, int save, CancellationToken cancellationToken)
 			return inputEnd - inputIndex;
 		}
 
+		[MethodImpl (MethodImplOptions.AggressiveInlining)]
 		long GetOffset (int index)
 		{
-			if (position == -1)
-				return -1;
-
 			return position - (inputEnd - index);
 		}
 

MimeKit/MimeReader.cs

@@ -1120,11 +1120,9 @@ int ReadAhead (int atleast, int save, CancellationToken cancellationToken)
 			return inputEnd - inputIndex;
 		}
 
+		[MethodImpl (MethodImplOptions.AggressiveInlining)]
 		long GetOffset (int index)
 		{
-			if (position == -1)
-				return -1;
-
 			return position - (inputEnd - index);
 		}