operators.hpp

/*
 * LMDB Abstraction Layer.
 * Copyright (C) 2023  Yury Gubich <blue@macaw.me>
 *
 * 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.
 *
 * 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
 
#include <map>
#include <set>
#include <vector>
#include <list>
#include <deque>
 
#include <QDataStream>
 
#include "base.h"
 
template <class K, class V>
QDataStream& operator << (QDataStream &out, const std::map<K, V>& container) {
    size_t size = container.size();
    if (size > std::numeric_limits<LMDBAL::SizeType>::max())
        throw std::runtime_error("Too many elements in the map");
 
    out << static_cast<LMDBAL::SizeType>(size);
    for (const std::pair<const K, V>& pair : container)
        out << pair;
 
    return out;
}
 
template <class K, class V>
QDataStream& operator >> (QDataStream &in, std::map<K, V>& container) {
    LMDBAL::SizeType size;
    in >> size;
    for (LMDBAL::SizeType i = 0; i < size; ++i) {
        std::pair<K, V> pair;
        in >> pair;
        container.insert(pair);
    }
 
    return in;
}
 
template <class K, class V>
QDataStream& operator << (QDataStream &out, const std::multimap<K, V>& container) {
    size_t size = container.size();
    if (size > std::numeric_limits<LMDBAL::SizeType>::max())
        throw std::runtime_error("Too many elements in the multimap");
 
    out << static_cast<LMDBAL::SizeType>(size);
    for (const std::pair<const K, V>& pair : container)
        out << pair;
 
    return out;
}
 
template <class K, class V>
QDataStream& operator >> (QDataStream &in, std::multimap<K, V>& container) {
    LMDBAL::SizeType size;
    in >> size;
    for (LMDBAL::SizeType i = 0; i < size; ++i) {
        std::pair<K, V> pair;
        in >> pair;
        container.insert(pair);
    }
 
    return in;
}
 
#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)
template <class K, class V>
QDataStream& operator << (QDataStream &out, const std::pair<K, V>& pair) {
    out << pair.first;
    out << pair.second;
 
    return out;
}
 
template <class K, class V>
QDataStream& operator >> (QDataStream &in, std::pair<K, V>& container) {
    in >> container.first;
    in >> container.second;
 
    return in;
}
#endif
 
template <class K>
QDataStream& operator << (QDataStream &out, const std::set<K>& container) {
    size_t size = container.size();
    if (size > std::numeric_limits<LMDBAL::SizeType>::max())
        throw std::runtime_error("Too many elements in the set");
 
    out << static_cast<LMDBAL::SizeType>(size);
    for (const K& value : container)
        out << value;
 
    return out;
}
 
template <class K>
QDataStream& operator >> (QDataStream &in, std::set<K>& container) {
    LMDBAL::SizeType size;
    in >> size;
    for (LMDBAL::SizeType i = 0; i < size; ++i) {
        K value;
        in >> value;
        container.insert(value);
    }
 
    return in;
}
 
template <class K>
QDataStream& operator << (QDataStream &out, const std::multiset<K>& container) {
    size_t size = container.size();
    if (size > std::numeric_limits<LMDBAL::SizeType>::max())
        throw std::runtime_error("Too many elements in the multiset");
 
    out << static_cast<LMDBAL::SizeType>(size);
    for (const K& value : container)
        out << value;
 
    return out;
}
 
template <class K>
QDataStream& operator >> (QDataStream &in, std::multiset<K>& container) {
    LMDBAL::SizeType size;
    in >> size;
    for (LMDBAL::SizeType i = 0; i < size; ++i) {
        K value;
        in >> value;
        container.insert(value);
    }
 
    return in;
}
 
template <class K>
QDataStream& operator << (QDataStream &out, const std::vector<K>& container) {
    size_t size = container.size();
    if (size > std::numeric_limits<LMDBAL::SizeType>::max())
        throw std::runtime_error("Too many elements in the vector");
 
    out << static_cast<LMDBAL::SizeType>(size);
    for (const K& value : container)
        out << value;
 
    return out;
}
 
template <class K>
QDataStream& operator >> (QDataStream &in, std::vector<K>& container) {
    LMDBAL::SizeType size;
    in >> size;
    container.resize(size);
    for (LMDBAL::SizeType i = 0; i < size; ++i)
        in >> container[i];
 
    return in;
}
 
template <class K>
QDataStream& operator << (QDataStream &out, const std::deque<K>& container) {
    size_t size = container.size();
    if (size > std::numeric_limits<LMDBAL::SizeType>::max())
        throw std::runtime_error("Too many elements in the deque");
 
    out << static_cast<LMDBAL::SizeType>(size);
    for (const K& value : container)
        out << value;
 
    return out;
}
 
template <class K>
QDataStream& operator >> (QDataStream &in, std::deque<K>& container) {
    LMDBAL::SizeType size;
    in >> size;
    container.resize(size);
    for (LMDBAL::SizeType i = 0; i < size; ++i)
        in >> container[i];
 
    return in;
}
 
template <class K>
QDataStream& operator << (QDataStream &out, const std::list<K>& container) {
    size_t size = container.size();
    if (size > std::numeric_limits<LMDBAL::SizeType>::max())
        throw std::runtime_error("Too many elements in the list");
 
    out << static_cast<LMDBAL::SizeType>(size);
    for (const K& value : container)
        out << value;
 
    return out;
}
 
template <class K>
QDataStream& operator >> (QDataStream &in, std::list<K>& container) {
    LMDBAL::SizeType size;
    in >> size;
    for (LMDBAL::SizeType i = 0; i < size; ++i) {
        typename std::list<K>::iterator itr = container.emplace(container.end());
        in >> *itr;
    }
 
    return in;
}