1 files changed, 130 insertions, 0 deletions
diff --git a/mcs/ilasm/codegen/FieldTable.cs b/mcs/ilasm/codegen/FieldTable.cs
new file mode 100644
index 00000000000..0a5aa46d52e
--- /dev/null
+++ b/mcs/ilasm/codegen/FieldTable.cs
@@ -0,0 +1,130 @@
+//
+// Mono.ILASM.FieldTable.cs
+//
+// Author(s):
+//  Jackson Harper (Jackson@LatitudeGeo.com)
+//
+// (C) 2003 Jackson Harper, All rights reserved
+//
+
+using PEAPI;
+using System;
+using System.Text;
+using System.Collections;
+
+namespace Mono.ILASM {
+
+	public class FieldTable {
+
+		private class FieldTableItem {
+		
+			private static readonly int DefinedFlag = 2;
+	
+			private int flags;
+
+			public ArrayList LocationList;
+			public FieldDef Field;
+
+			public FieldTableItem (FieldDef field, Location location)
+			{
+				flags = 0;
+				Field = field;
+				LocationList = new ArrayList ();
+				LocationList.Add (location);
+			}
+		
+			public bool Defined {
+				get { return ((flags & DefinedFlag) != 0); }
+				set {
+					if (value)
+						flags |= DefinedFlag;
+					else
+						flags ^= DefinedFlag;
+				}
+			}
+		}
+
+		protected Hashtable table;
+		protected ClassDef parent_class;
+		
+		public FieldTable (ClassDef parent_class)
+		{
+			this.parent_class = parent_class;
+			table = new Hashtable ();
+		}
+
+		public Field GetReference (TypeRef type, string name, Location location)
+		{
+			FieldTableItem item = table[name] as FieldTableItem;
+			
+			if (item != null) {
+				item.LocationList.Add (location);
+				return item.Field;
+			}
+			
+			FieldDef field = parent_class.AddField (name, type.Type);
+			AddReferenced (name, field, location);
+
+			return field;
+		}
+	
+		public FieldDef AddDefinition (FieldAttr field_attr, string name, 
+			TypeRef type, Location location) 
+		{
+			FieldTableItem item = (FieldTableItem) table[name];
+			
+			if (item == null) {
+				FieldDef field = parent_class.AddField (field_attr, name, type.Type);
+				AddDefined (name, field, location);
+				return field;
+			}
+			
+			item.Field.AddFieldAttr (field_attr);
+			item.Defined = true;
+			
+			return item.Field;
+		}
+
+		public bool CheckDefined ()
+		{
+			foreach (DictionaryEntry dic_entry in table) {
+				FieldTableItem table_item = (FieldTableItem) dic_entry.Value;
+				if (table_item.Defined)
+					continue;
+				Report.Error (String.Format ("Field: {0} is not defined.", dic_entry.Key));
+			}
+			return true;
+		}
+			
+		protected void AddDefined (string signature, FieldDef field, Location location)
+		{
+			if (table.Contains (signature))
+				return; 
+
+			FieldTableItem item = new FieldTableItem (field, location);
+			item.Defined = true;
+
+			table[signature] = item;
+		}
+
+		protected void AddReferenced (string signature, FieldDef field, Location location)
+		{
+			FieldTableItem item = new FieldTableItem (field, location);
+			
+			table[signature] = item;
+		}
+
+		/// <summary>
+		///  If a field is allready defined throw an Error
+		/// </summary>
+		protected void CheckExists (string signature) 
+		{
+			FieldTableItem item = table[signature] as FieldTableItem;
+			
+			if ((item != null) && (item.Defined))
+				Report.Error ("Field: " + signature + " defined in multiple locations.");
+		}
+	}
+
+}
+