/**
 * Orthanc - A Lightweight, RESTful DICOM Store
 * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics
 * Department, University Hospital of Liege, Belgium
 * Copyright (C) 2017-2020 Osimis S.A., Belgium
 *
 * 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 3 of the
 * License, or (at your option) any later version.
 *
 * In addition, as a special exception, the copyright holders of this
 * program give permission to link the code of its release with the
 * OpenSSL project's "OpenSSL" library (or with modified versions of it
 * that use the same license as the "OpenSSL" library), and distribute
 * the linked executables. You must obey the GNU General Public License
 * in all respects for all of the code used other than "OpenSSL". If you
 * modify file(s) with this exception, you may extend this exception to
 * your version of the file(s), but you are not obligated to do so. If
 * you do not wish to do so, delete this exception statement from your
 * version. If you delete this exception statement from all source files
 * in the program, then also delete it here.
 * 
 * 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, see <http://www.gnu.org/licenses/>.
 **/


#pragma once

#if ORTHANC_ENABLE_DCMTK != 1
#  error The macro ORTHANC_ENABLE_DCMTK must be set to 1 to use this file
#endif

#include "../DicomFormat/DicomMap.h"

namespace Orthanc
{
  class ParsedDicomDir : public boost::noncopyable
  {
  private:
    typedef std::map<uint32_t, size_t>  OffsetToIndex;

    std::vector<DicomMap*>  content_;
    std::vector<size_t>     nextOffsets_;
    std::vector<size_t>     lowerOffsets_;
    OffsetToIndex           offsetToIndex_;

    void Clear();

    bool LookupIndexOfOffset(size_t& target,
                             unsigned int offset) const;

  public:
    ParsedDicomDir(const std::string content);

    ~ParsedDicomDir()
    {
      Clear();
    }

    size_t GetSize() const
    {
      return content_.size();
    }

    const DicomMap& GetItem(size_t i) const;

    bool LookupNext(size_t& target,
                    size_t index) const;

    bool LookupLower(size_t& target,
                     size_t index) const;
  };
}