/** \file IStream.h
 ** \date  2008-11-15
 ** \author grymse@alhem.net
**/
/*
Copyright (C) 2008-2010  Anders Hedstrom

This library is made available under the terms of the GNU GPL, with
the additional exemption that compiling, linking, and/or using OpenSSL
is allowed.

If you would like to use this library in a closed-source application,
a separate license agreement is available. For information about
the closed-source license agreement for the C++ sockets library,
please visit http://www.alhem.net/Sockets/license.html and/or
email license@alhem.net.

This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
*/
#ifndef _SOCKETS_IStream_H
#define _SOCKETS_IStream_H

#include "sockets-config.h"
#include <string>

#ifdef SOCKETS_NAMESPACE
namespace SOCKETS_NAMESPACE
{
#endif

class IStream
{
public:
  virtual ~IStream() {}

  /** Try to read 'buf_sz' number of bytes from source.
      \return Number of bytes actually read. */
  virtual size_t IStreamRead(char *buf, size_t buf_sz) = 0;

  /** Write 'sz' bytes to destination. */
  virtual void IStreamWrite(const char *buf, size_t sz) = 0;

};

#ifdef SOCKETS_NAMESPACE
}
#endif

#endif // _SOCKETS_IStream_H
