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/*
* libopenraw - streamclone.h
*
* Copyright (C) 2006 Hubert Figuière
*
* This library is free software: you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public License
* as published by the Free Software Foundation, either version 3 of
* the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see
* <http://www.gnu.org/licenses/>.
*/
#ifndef __IO_STREAMCLONE_H__
#define __IO_STREAMCLONE_H__
#include <sys/types.h>
#include <unistd.h>
#include "stream.h"
namespace OpenRaw {
namespace IO {
/** @brief cloned stream. Allow reading from a different offset
*/
class StreamClone
: public Stream
{
public:
StreamClone(Stream *clone, off_t offset);
virtual ~StreamClone();
virtual Error open();
virtual int close();
virtual int seek(off_t offset, int whence);
virtual int read(void *buf, size_t count);
virtual off_t filesize();
private:
/** private copy constructor to make sure it is not called */
StreamClone(const StreamClone& f);
/** private = operator to make sure it is never called */
StreamClone & operator=(const StreamClone&);
Stream *m_cloned;
off_t m_offset;
};
}
}
#endif
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