Imported Upstream version 4.6.0.125

Former-commit-id: a2155e9bd80020e49e72e86c44da02a8ac0e57a4

mcs/class/referencesource/System.Data/Microsoft/SqlServer/Server/SmiStream.cs

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+//------------------------------------------------------------------------------
+// <copyright file="SmiStream.cs" company="Microsoft">
+//     Copyright (c) Microsoft Corporation.  All rights reserved.
+// </copyright>
+// <owner current="true" primary="true">alazela</owner>
+// <owner current="true" primary="false">stevesta</owner>
+//------------------------------------------------------------------------------
+
+// Stream-like object that uses SmiEventSink for server-side errors.
+namespace Microsoft.SqlServer.Server {
+    using System;
+    using System.IO;
+
+    internal abstract class SmiStream {
+        public abstract bool CanRead {
+            get;
+        }
+
+        // If CanSeek is false, Position, Seek, Length, and SetLength should throw.
+        public abstract bool CanSeek {
+            get;
+        }
+
+        public abstract bool CanWrite {
+            get;
+        }
+
+        public abstract long GetLength( SmiEventSink sink );
+
+        public abstract long GetPosition( SmiEventSink sink );
+        public abstract void SetPosition( SmiEventSink sink, long position );
+
+        public abstract void Flush( SmiEventSink sink );
+
+        public abstract long Seek( SmiEventSink sink, long offset, SeekOrigin origin );
+
+        public abstract void SetLength( SmiEventSink sink, long value );
+
+        public abstract int Read( SmiEventSink sink, byte[] buffer, int offset, int count );
+        public abstract void Write( SmiEventSink sink, byte[] buffer, int offset, int count );
+
+        public abstract int Read( SmiEventSink sink, char[] buffer, int offset, int count );
+        public abstract void Write( SmiEventSink sink, char[] buffer, int offset, int count );
+    }
+
+}