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/* -*- Mode: C++ -*- */
/*
* libopenraw - streamclone.h
*
* Copyright (C) 2006-2016 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 OR_INTERNALS_IO_STREAMCLONE_H_
#define OR_INTERNALS_IO_STREAMCLONE_H_
#include <stddef.h>
#include <sys/types.h>
#include "stream.hpp"
namespace OpenRaw {
namespace IO {
/** @brief cloned stream. Allow reading from a different offset
*/
class StreamClone
: public Stream
{
public:
StreamClone(const Stream::Ptr &clone, off_t offset);
virtual ~StreamClone();
StreamClone(const StreamClone& f) = delete;
StreamClone & operator=(const StreamClone&) = delete;
virtual Error open() override;
virtual int close() override;
virtual int seek(off_t offset, int whence) override;
virtual int read(void *buf, size_t count) override;
virtual off_t filesize() override;
private:
Stream::Ptr m_cloned;
off_t m_offset;
};
}
}
#endif
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