seek_element.h

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/* Tide
 *
 * Header file for the Seek element, a child of SeekHead.
 *
 * Copyright 2011 Geoffrey Biggs geoffrey.biggs@aist.go.jp
 *     RT-Synthesis Research Group
 *     Intelligent Systems Research Institute,
 *     National Institute of Advanced Industrial Science and Technology (AIST),
 *     Japan
 *     All rights reserved.
 *
 * This file is part of Tide.
 *
 * Tide 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 2.1 of the License, or
 * (at your option) any later version.
 *
 * Tide 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 Tide. If not, see <http://www.gnu.org/licenses/>.
 */

#if !defined(TIDE_SEEK_ELEMENT_H_)
#define TIDE_SEEK_ELEMENT_H_

#include <ios>
#include <tide/binary_element.h>
#include <tide/el_ids.h>
#include <tide/master_element.h>
#include <tide/uint_element.h>
#include <tide/win_dll.h>


namespace tide
{
    class TIDE_EXPORT SeekElement : public MasterElement
    {
        public:
            SeekElement(ids::ID id, std::streampos offset);

            virtual ~SeekElement() {}

            ids::ID indexed_id() const;
            void indexed_id(ids::ID id);

            std::streamsize offset() const { return offset_.value(); }
            void offset(std::streamsize offset) { offset_.value(offset); }

            virtual std::streamsize write_body(std::ostream& output);

        protected:
            BinaryElement indexed_id_;
            UIntElement offset_;

            virtual std::streamsize body_size() const;

            virtual std::streamsize read_body(std::istream& input,
                    std::streamsize size);
    }; // class SeekElement
}; // namespace tide


#endif // TIDE_SEEK_ELEMENT_H_