DataManage/libs/QxOrm/include/QxSerialize/QDataStream/QxSerializeQDataStream_std_map.h

/****************************************************************************
**
** https://www.qxorm.com/
** Copyright (C) 2013 Lionel Marty (contact@qxorm.com)
**
** This file is part of the QxOrm library
**
** This software is provided 'as-is', without any express or implied
** warranty. In no event will the authors be held liable for any
** damages arising from the use of this software
**
** Commercial Usage
** Licensees holding valid commercial QxOrm licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Lionel Marty
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file 'license.gpl3.txt' included in the
** packaging of this file. Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
** met : http://www.gnu.org/copyleft/gpl.html
**
** If you are unsure which license is appropriate for your use, or
** if you have questions regarding the use of this file, please contact :
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****************************************************************************/

#ifndef _QX_SERIALIZE_QDATASTREAM_STD_MAP_H_
#define _QX_SERIALIZE_QDATASTREAM_STD_MAP_H_

#ifdef _MSC_VER
#pragma once
#endif

/*!
 * \file QxSerializeQDataStream_std_map.h
 * \author Lionel Marty
 * \ingroup QxSerialize
 * \brief Provide a Qt QDataStream serialization method (save/load) for type std::map<Key, Value>
 */

#include <QtCore/qdatastream.h>

#include <map>

template <typename Key, typename Value>
QDataStream & operator<< (QDataStream & stream, const std::map<Key, Value> & t)
{
   typedef typename std::map<Key, Value>::const_iterator type_itr;
   quint64 uiSize = static_cast<quint64>(t.size());
   stream << uiSize;

   for (type_itr itr = t.begin(); itr != t.end(); ++itr)
   {
      stream << itr->first;
      stream << itr->second;
   }

   return stream;
}

template <typename Key, typename Value>
QDataStream & operator>> (QDataStream & stream, std::map<Key, Value> & t)
{
   quint64 uiSize = 0;
   stream >> uiSize;
   t.clear();

   for (quint64 i = 0; i < uiSize; ++i)
   {
      Key key;       stream >> key;
      Value value;   stream >> value;
      t.insert(std::make_pair(key, value));
   }

   return stream;
}

#endif // _QX_SERIALIZE_QDATASTREAM_STD_MAP_H_