mirror of
https://github.com/KingDuckZ/dindexer.git
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89 lines
3 KiB
C++
89 lines
3 KiB
C++
/* Copyright 2015, Michele Santullo
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* This file is part of "dindexer".
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*
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* "dindexer" is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* "dindexer" is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with "dindexer". If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef id68BF7AAC5BD54AF2BBD6EC1318B6687E
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#define id68BF7AAC5BD54AF2BBD6EC1318B6687E
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#include "pq/resultset.hpp"
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#include "pq/implem/pq_type_helpers.hpp"
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#include <string>
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#include <cstdint>
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#include <memory>
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#include <boost/utility/string_ref.hpp>
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struct pg_param;
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typedef pg_param PGparam;
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namespace pq {
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class Connection {
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public:
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Connection ( std::string&& parUsername, std::string&& parPasswd, std::string&& parDatabase, std::string&& parAddress, uint16_t parPort );
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Connection ( Connection&& );
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Connection ( const Connection& ) = delete;
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~Connection ( void ) noexcept;
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std::string error_message ( void ) const;
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bool is_connected ( void ) const noexcept;
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void connect ( void );
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void disconnect ( void );
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ResultSet query ( const std::string& parQuery );
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std::string escaped_literal ( const std::string& parString );
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std::string escaped_literal ( boost::string_ref parString );
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template <typename... Args>
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ResultSet query ( const std::string& parQuery, Args&&... parArgs );
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Connection& operator= ( Connection&& );
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Connection& operator= ( const Connection& ) = delete;
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private:
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struct LocalData;
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using PGParams = std::unique_ptr<::PGparam, void(*)(::PGparam*)>;
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ResultSet query_params ( const std::string& parQuery, PGParams& parParams );
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PGParams make_params ( const std::string* parTypes, ... );
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std::unique_ptr<LocalData> m_localData;
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std::string m_username;
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std::string m_passwd;
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std::string m_database;
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std::string m_address;
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uint16_t m_port;
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};
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template <typename... Args>
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ResultSet Connection::query (const std::string& parQuery, Args&&... parArgs) {
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using std::remove_cv;
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using std::remove_reference;
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auto make_pgparams = [&parArgs..., this](){
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using implem::make_pqtypes_name;
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using implem::concat_strings;
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auto types_bt = concat_strings(make_pqtypes_name<typename remove_cv<typename remove_reference<Args>::type>::type>()...);
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static_assert(types_bt.size() > 0, "Invalid empty types string (function called with no arguments?)");
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const std::string types(types_bt.data(), types_bt.size());
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return this->make_params(&types, implem::get_pqlib_c_type_struct<typename remove_cv<typename remove_reference<Args>::type>::type>().conv(parArgs)...);
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};
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PGParams pgparams = make_pgparams();
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return this->query_params(parQuery, pgparams);
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}
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} //namespace pq
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#endif
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