X-Git-Url: http://wien.tomnetworks.com/gitweb/?a=blobdiff_plain;f=mcs%2Fmcs%2Flocation.cs;h=72c4485aef9b64a36c201067ee46a134cd542dde;hb=e9e273a33bb56653d40b19455396c382a7da3e2b;hp=4b598528c9a32eb292984a0b1361848b0959b5c3;hpb=ffe4df2dfaeb0a14978ed0141a88b0ee0bfd5bd0;p=mono.git

diff --git a/mcs/mcs/location.cs b/mcs/mcs/location.cs
index 4b598528c9a..72c4485aef9 100644
--- a/mcs/mcs/location.cs
+++ b/mcs/mcs/location.cs
@@ -8,7 +8,9 @@
 //
 
 using System;
+using System.IO;
 using System.Collections;
+using System.Diagnostics.SymbolStore;
 
 namespace Mono.CSharp {
 	/// <summary>
@@ -26,18 +28,23 @@ namespace Mono.CSharp {
 		public int token; 
 
 		static Hashtable map;
+		static Hashtable sym_docs;
 		static ArrayList list;
 		static int global_count;
 		static int module_base;
 
+		public readonly static Location Null;
+		
 		static Location ()
 		{
 			map = new Hashtable ();
 			list = new ArrayList ();
+			sym_docs = new Hashtable ();
 			global_count = 0;
 			module_base = 0;
+			Null.token = -1;
 		}
-	
+
 		static public void Push (string name)
 		{
 			map.Remove (global_count);
@@ -70,12 +77,6 @@ namespace Mono.CSharp {
 			return l.token == -1;
 		}
 
-		static public Location Null {
-			get {
-				return new Location (-1);
-			}
-		}
-
 		public string Name {
 			get {
 				int best = 0;
@@ -105,5 +106,49 @@ namespace Mono.CSharp {
 				return token - best;
 			}
 		}
+
+		// The ISymbolDocumentWriter interface is used by the symbol writer to
+		// describe a single source file - for each source file there's exactly
+		// one corresponding ISymbolDocumentWriter instance.
+		//
+		// This class has an internal hash table mapping source document names
+		// to such ISymbolDocumentWriter instances - so there's exactly one
+		// instance per document.
+		//
+		// This property returns the ISymbolDocumentWriter instance which belongs
+		// to the location's source file.
+		//
+		// If we don't have a symbol writer, this property is always null.
+		public ISymbolDocumentWriter SymbolDocument {
+			get {
+				ISymbolWriter sw = CodeGen.SymbolWriter;
+				ISymbolDocumentWriter doc;
+
+				if (token < 0)
+					return null;
+
+				// If we don't have a symbol writer, return null.
+				if (sw == null)
+					return null;
+
+				string path = Path.GetFullPath (Name);
+
+				if (sym_docs.Contains (path))
+					// If we already created an ISymbolDocumentWriter
+					// instance for this document, return it.
+					doc = (ISymbolDocumentWriter) sym_docs [path];
+				else {
+					// Create a new ISymbolDocumentWriter instance and
+					// store it in the hash table.
+					doc = sw.DefineDocument (path, SymLanguageType.CSharp,
+								 SymLanguageVendor.Microsoft,
+								 SymDocumentType.Text);
+
+					sym_docs.Add (path, doc);
+				}
+
+				return doc;
+			}
+		}
 	}
 }