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using System;
using System.IO;
namespace Org.BouncyCastle.Crypto.Tls
{
public class ByteQueueStream
: Stream
{
private readonly ByteQueue buffer;
public ByteQueueStream()
{
this.buffer = new ByteQueue();
}
public virtual int Available
{
get { return buffer.Available; }
}
public override bool CanRead
{
get { return true; }
}
public override bool CanSeek
{
get { return false; }
}
public override bool CanWrite
{
get { return true; }
}
public override void Close()
{
}
public override void Flush()
{
}
public override long Length
{
get { throw new NotSupportedException(); }
}
public virtual int Peek(byte[] buf)
{
int bytesToRead = System.Math.Min(buffer.Available, buf.Length);
buffer.Read(buf, 0, bytesToRead, 0);
return bytesToRead;
}
public override long Position
{
get { throw new NotSupportedException(); }
set { throw new NotSupportedException(); }
}
public virtual int Read(byte[] buf)
{
return Read(buf, 0, buf.Length);
}
public override int Read(byte[] buf, int off, int len)
{
int bytesToRead = System.Math.Min(buffer.Available, len);
buffer.RemoveData(buf, off, bytesToRead, 0);
return bytesToRead;
}
public override int ReadByte()
{
if (buffer.Available == 0)
return -1;
return buffer.RemoveData(1, 0)[0] & 0xFF;
}
public override long Seek(long offset, SeekOrigin origin)
{
throw new NotSupportedException();
}
public override void SetLength(long value)
{
throw new NotSupportedException();
}
public virtual int Skip(int n)
{
int bytesToSkip = System.Math.Min(buffer.Available, n);
buffer.RemoveData(bytesToSkip);
return bytesToSkip;
}
public virtual void Write(byte[] buf)
{
buffer.AddData(buf, 0, buf.Length);
}
public override void Write(byte[] buf, int off, int len)
{
buffer.AddData(buf, off, len);
}
public override void WriteByte(byte b)
{
buffer.AddData(new byte[]{ b }, 0, 1);
}
}
}
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