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using System;
using System.Collections.Generic;
using System.IO;
namespace SharpCompress.IO
{
internal class ReadOnlyAppendingStream : Stream
{
private readonly Queue<Stream> streams;
private Stream current;
public ReadOnlyAppendingStream(IEnumerable<Stream> streams)
{
this.streams = new Queue<Stream>(streams);
}
public override bool CanRead
{
get { return true; }
}
public override bool CanSeek
{
get { return false; }
}
public override bool CanWrite
{
get { return false; }
}
public override void Flush()
{
throw new NotImplementedException();
}
public override long Length
{
get { throw new NotImplementedException(); }
}
public override long Position
{
get
{
throw new NotImplementedException();
}
set
{
throw new NotImplementedException();
}
}
public override int Read(byte[] buffer, int offset, int count)
{
if (current == null && streams.Count == 0)
{
return -1;
}
if (current == null)
{
current = streams.Dequeue();
}
int totalRead = 0;
while (totalRead < count)
{
int read = current.Read(buffer, offset + totalRead, count - totalRead);
if (read <= 0)
{
if (streams.Count == 0)
{
return totalRead;
}
else
{
current = streams.Dequeue();
}
}
totalRead += read;
}
return totalRead;
}
public override long Seek(long offset, SeekOrigin origin)
{
throw new NotImplementedException();
}
public override void SetLength(long value)
{
throw new NotImplementedException();
}
public override void Write(byte[] buffer, int offset, int count)
{
throw new NotImplementedException();
}
}
}
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