merge common implementations and server implementations

Emby.Server.Implementations/IO/SharpCifs/Util/Sharpen/EnumeratorWrapper.cs

@@ -0,0 +1,55 @@
+using System;
+using System.Collections.Generic;
+
+namespace SharpCifs.Util.Sharpen
+{
+    internal class EnumeratorWrapper<T> : Iterator<T>
+	{
+		object _collection;
+		IEnumerator<T> _e;
+		T _lastVal;
+		bool _more;
+		bool _copied;
+
+		public EnumeratorWrapper (object collection, IEnumerator<T> e)
+		{
+			this._e = e;
+			this._collection = collection;
+			_more = e.MoveNext ();
+		}
+
+		public override bool HasNext ()
+		{
+			return _more;
+		}
+
+		public override T Next ()
+		{
+			if (!_more)
+				throw new NoSuchElementException ();
+			_lastVal = _e.Current;
+			_more = _e.MoveNext ();
+			return _lastVal;
+		}
+
+		public override void Remove ()
+		{
+			ICollection<T> col = _collection as ICollection<T>;
+			if (col == null) {
+				throw new NotSupportedException ();
+			}
+			if (_more && !_copied) {
+				// Read the remaining elements, since the current enumerator
+				// will be invalid after removing the element
+				List<T> remaining = new List<T> ();
+				do {
+					remaining.Add (_e.Current);
+				} while (_e.MoveNext ());
+				_e = remaining.GetEnumerator ();
+				_e.MoveNext ();
+				_copied = true;
+			}
+			col.Remove (_lastVal);
+		}
+	}
+}