SqlClientWrapperSmiStreamChars.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / Data / System / Data / SqlClient / SqlClientWrapperSmiStreamChars.cs / 1305376 / SqlClientWrapperSmiStreamChars.cs
                        

                        
                            //------------------------------------------------------------------------------ 
// 
//     Copyright (c) Microsoft Corporation.  All rights reserved.
// 
// [....] 
// [....]
//----------------------------------------------------------------------------- 
 
namespace Microsoft.SqlServer.Server {
    using System; 
    using System.Data.Common;
    using System.Data.SqlClient;
    using System.Data.SqlTypes;
    using System.Diagnostics; 
    using System.IO;
 
    // Simple SqlStreamChars wrapper over SmiStream that handles server events on the 
    //  SqlClient side of Smi
    internal class SqlClientWrapperSmiStreamChars : SqlStreamChars { 

        private SmiEventSink_Default    _sink;
        private SmiStream               _stream;
 
        internal SqlClientWrapperSmiStreamChars( SmiEventSink_Default sink, SmiStream stream ) {
            Debug.Assert( null != sink ); 
            Debug.Assert( null != stream ); 
            _sink = sink;
            _stream = stream; 
        }

        public override bool IsNull {
            get { 
                return null == _stream;
            } 
        } 

        public override bool CanRead { 
            get {
                return _stream.CanRead;
            }
        } 

        // If CanSeek is false, Position, Seek, Length, and SetLength should throw. 
        public override bool CanSeek { 
            get {
                return _stream.CanSeek; 
            }
        }

        public override bool CanWrite { 
            get {
                return _stream.CanWrite; 
            } 
        }
 
        public override long Length {
            get {
                long length = _stream.GetLength( _sink );
                _sink.ProcessMessagesAndThrow(); 
                if ( length > 0 )
                    return length / sizeof( char ); 
                else 
                    return length;
            } 
        }

        public override long Position {
            get { 
                long position = _stream.GetPosition( _sink ) / sizeof( char );
                _sink.ProcessMessagesAndThrow(); 
                return position; 
            }
            set { 
                if ( value < 0 ) {
                    throw ADP.ArgumentOutOfRange("Position");
                }
                _stream.SetPosition( _sink, value * sizeof( char ) ); 
                _sink.ProcessMessagesAndThrow();
            } 
        } 

        public override void Flush() { 
            _stream.Flush( _sink );
            _sink.ProcessMessagesAndThrow();
        }
 
        public override long Seek(long offset, SeekOrigin origin) {
            long result = _stream.Seek( _sink, offset * sizeof( char ), origin ); 
            _sink.ProcessMessagesAndThrow(); 
            return result;
        } 

        public override void SetLength(long value) {
            if ( value < 0 ) {
                throw ADP.ArgumentOutOfRange("value"); 
            }
            _stream.SetLength( _sink, value * sizeof( char ) ); 
            _sink.ProcessMessagesAndThrow(); 
        }
 
        public override int Read(char[] buffer, int offset, int count) {
            int bytesRead = _stream.Read( _sink, buffer, offset * sizeof( char ), count );
            _sink.ProcessMessagesAndThrow();
            return bytesRead; 
        }
 
        public override void Write(char[] buffer, int offset, int count) { 
            _stream.Write( _sink, buffer, offset, count );
            _sink.ProcessMessagesAndThrow(); 
        }

        // Convenience methods to allow simple pulling/pushing of raw bytes
        internal int Read(byte[] buffer, int offset, int count) { 
            int bytesRead = _stream.Read( _sink, buffer, offset, count );
            _sink.ProcessMessagesAndThrow(); 
            return bytesRead; 
        }
 
        internal void Write(byte[] buffer, int offset, int count) {
            _stream.Write( _sink, buffer, offset, count );
            _sink.ProcessMessagesAndThrow();
        } 
    }
 
} 

 


// File provided for Reference Use Only by Microsoft Corporation (c) 2007.

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