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//------------------------------------------------------------
// Copyright (c) Microsoft Corporation. All rights reserved.
//------------------------------------------------------------
namespace System.ServiceModel.Channels
{
using System.IO;
abstract class DetectEofStream : DelegatingStream
{
bool isAtEof;
protected DetectEofStream(Stream stream)
: base(stream)
{
this.isAtEof = false;
}
protected bool IsAtEof
{
get { return this.isAtEof; }
}
public override int EndRead(IAsyncResult result)
{
int returnValue = base.EndRead(result);
if (returnValue == 0)
{
ReceivedEof();
}
return returnValue;
}
public override int ReadByte()
{
int returnValue = base.ReadByte();
if (returnValue == -1)
{
ReceivedEof();
}
return returnValue;
}
public override int Read(byte[] buffer, int offset, int count)
{
if (isAtEof)
{
return 0;
}
int returnValue = base.Read(buffer, offset, count);
if (returnValue == 0)
{
ReceivedEof();
}
return returnValue;
}
void ReceivedEof()
{
if (!isAtEof)
{
this.isAtEof = true;
this.OnReceivedEof();
}
}
protected virtual void OnReceivedEof()
{
}
}
}
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