QxSerializeQDataStream_std_map.h

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** Copyright (C) 2013 Lionel Marty (contact@qxorm.com)
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#ifndef _QX_SERIALIZE_QDATASTREAM_STD_MAP_H_
#define _QX_SERIALIZE_QDATASTREAM_STD_MAP_H_

#ifdef _MSC_VER
#pragma once
#endif

#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_