1 files changed, 47 insertions, 0 deletions
diff --git a/csharp/src/ProtocolBuffers/Collections/RepeatedFieldExtensions.cs b/csharp/src/ProtocolBuffers/Collections/RepeatedFieldExtensions.cs
new file mode 100644
index 00000000..c5a934a1
--- /dev/null
+++ b/csharp/src/ProtocolBuffers/Collections/RepeatedFieldExtensions.cs
@@ -0,0 +1,47 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+
+namespace Google.Protobuf.Collections
+{
+    public static class RepeatedFieldExtensions
+    {
+        internal static uint CalculateSize<T>(this RepeatedField<T> list, Func<T, int> sizeComputer)
+        {
+            int size = 0;
+            foreach (var item in list)
+            {
+                size += sizeComputer(item);
+            }
+            return (uint)size;
+        }
+
+        /*
+        /// <summary>
+        /// Calculates the serialized data size, including one tag per value.
+        /// </summary>
+        public static int CalculateTotalSize<T>(this RepeatedField<T> list, int tagSize, Func<T, int> sizeComputer)
+        {
+            if (list.Count == 0)
+            {
+                return 0;
+            }
+            return (int)(dataSize + tagSize * list.Count);
+        }
+
+        /// <summary>
+        /// Calculates the serialized data size, as a packed array (tag, length, data).
+        /// </summary>
+        public static int CalculateTotalPackedSize(int tagSize)
+        {
+            if (Count == 0)
+            {
+                return 0;
+            }
+            uint dataSize = CalculateSize();
+            return tagSize + CodedOutputStream.ComputeRawVarint32Size(dataSize) + (int)dataSize;
+        }
+        */
+    }
+}