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Move libpqtypes template helpers out to a new header.
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3 changed files with 85 additions and 73 deletions
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@ -19,12 +19,11 @@
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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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#include <chrono>
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#include <type_traits>
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struct pg_param;
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typedef pg_param PGparam;
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@ -62,50 +61,6 @@ namespace pq {
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std::unique_ptr<LocalData> m_localData;
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};
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namespace implem {
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template <typename T>
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const char* type_to_pqtypes_name ( void );
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template <typename T>
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struct get_pqlib_c_type_struct {
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using type = T;
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static type conv ( T parParam ) { return parParam; }
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};
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template <>
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struct get_pqlib_c_type_struct<std::string> {
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using type = const char*;
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static type conv ( const std::string& parParam ) { return parParam.c_str(); }
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};
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template <>
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struct get_pqlib_c_type_struct<boost::string_ref> {
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using type = const char*;
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static type conv ( const boost::string_ref& parParam ) { return parParam.data(); }
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};
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template <>
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struct get_pqlib_c_type_struct<bool> {
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using type = int;
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static type conv ( bool parParam ) { return (parParam ? 1 : 0); }
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};
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template <>
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struct get_pqlib_c_type_struct<std::chrono::system_clock::time_point> {
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struct StorageStruct { uint64_t epoch; int a[14]; char tzabbr[16]; };
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static constexpr std::size_t DATA_SIZE = sizeof(StorageStruct);
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using storage = std::aligned_storage<DATA_SIZE, alignof(uint64_t)>::type;
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storage m_storage;
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public:
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using type = const storage*;
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type conv ( const std::chrono::system_clock::time_point& parParam );
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~get_pqlib_c_type_struct ( void ) noexcept;
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};
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template <typename T>
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inline typename get_pqlib_c_type_struct<T>::type get_pqlib_c_type (const T& parParam) {
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return get_pqlib_c_type_struct<T>::conv(parParam);
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}
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} //namespace implem
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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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84
include/pq/implem/pq_type_helpers.hpp
Normal file
84
include/pq/implem/pq_type_helpers.hpp
Normal file
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@ -0,0 +1,84 @@
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/* 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 idEC73C3E4D64D44ABA0DB7D41FA8A7EB7
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#define idEC73C3E4D64D44ABA0DB7D41FA8A7EB7
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#include <chrono>
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#include <type_traits>
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#include <boost/utility/string_ref.hpp>
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namespace pq {
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namespace implem {
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template <typename T>
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const char* type_to_pqtypes_name ( void );
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template <typename T>
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struct get_pqlib_c_type_struct {
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using type = T;
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static type conv ( T parParam ) { return parParam; }
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};
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template <>
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struct get_pqlib_c_type_struct<std::string> {
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using type = const char*;
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static type conv ( const std::string& parParam ) { return parParam.c_str(); }
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};
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template <>
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struct get_pqlib_c_type_struct<boost::string_ref> {
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using type = const char*;
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static type conv ( const boost::string_ref& parParam ) { return parParam.data(); }
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};
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template <>
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struct get_pqlib_c_type_struct<bool> {
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using type = int;
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static type conv ( bool parParam ) { return (parParam ? 1 : 0); }
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};
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template <>
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struct get_pqlib_c_type_struct<std::chrono::system_clock::time_point> {
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struct StorageStruct { uint64_t epoch; int a[14]; char tzabbr[16]; };
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static constexpr std::size_t DATA_SIZE = sizeof(StorageStruct);
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using storage = std::aligned_storage<DATA_SIZE, alignof(uint64_t)>::type;
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storage m_storage;
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public:
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using type = const storage*;
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type conv ( const std::chrono::system_clock::time_point& parParam );
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~get_pqlib_c_type_struct ( void ) noexcept;
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};
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template <typename T>
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inline typename get_pqlib_c_type_struct<T>::type get_pqlib_c_type (const T& parParam) {
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return get_pqlib_c_type_struct<T>::conv(parParam);
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}
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template <> inline const char* type_to_pqtypes_name<std::string>() { return "%text"; }
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template <> inline const char* type_to_pqtypes_name<boost::string_ref>() { return "%text"; }
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template <> inline const char* type_to_pqtypes_name<bool>() { return "%bool"; }
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template <> inline const char* type_to_pqtypes_name<float>() { return "%float4"; }
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template <> inline const char* type_to_pqtypes_name<double>() { return "%float8"; }
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template <> inline const char* type_to_pqtypes_name<int16_t>() { return "%int2"; }
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template <> inline const char* type_to_pqtypes_name<int32_t>() { return "%int4"; }
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template <> inline const char* type_to_pqtypes_name<int64_t>() { return "%int8"; }
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template <> inline const char* type_to_pqtypes_name<uint16_t>() { return "%int2"; }
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template <> inline const char* type_to_pqtypes_name<uint32_t>() { return "%int4"; }
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template <> inline const char* type_to_pqtypes_name<uint64_t>() { return "%int8"; }
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template <> inline const char* type_to_pqtypes_name<std::chrono::system_clock::time_point>() { return "%timestamptz"; }
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} //namespace implem
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} //namespace pq
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#endif
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@ -30,35 +30,8 @@
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#include <ctime>
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#include <cassert>
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using sc = std::chrono::system_clock;
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namespace pq {
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namespace implem {
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template <> const char* type_to_pqtypes_name<std::string>() { return "%text"; }
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template <> const char* type_to_pqtypes_name<boost::string_ref>() { return "%text"; }
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template <> const char* type_to_pqtypes_name<bool>() { return "%bool"; }
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template <> const char* type_to_pqtypes_name<float>() { return "%float4"; }
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template <> const char* type_to_pqtypes_name<double>() { return "%float8"; }
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template <> const char* type_to_pqtypes_name<int16_t>() { return "%int2"; }
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template <> const char* type_to_pqtypes_name<int32_t>() { return "%int4"; }
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template <> const char* type_to_pqtypes_name<int64_t>() { return "%int8"; }
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template <> const char* type_to_pqtypes_name<uint16_t>() { return "%int2"; }
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template <> const char* type_to_pqtypes_name<uint32_t>() { return "%int4"; }
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template <> const char* type_to_pqtypes_name<uint64_t>() { return "%int8"; }
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template <> const char* type_to_pqtypes_name<sc::time_point>() { return "%timestamptz"; }
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template const char* type_to_pqtypes_name<std::string> ( void );
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template const char* type_to_pqtypes_name<boost::string_ref> ( void );
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template const char* type_to_pqtypes_name<bool> ( void );
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template const char* type_to_pqtypes_name<float> ( void );
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template const char* type_to_pqtypes_name<double> ( void );
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template const char* type_to_pqtypes_name<int16_t> ( void );
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template const char* type_to_pqtypes_name<int32_t> ( void );
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template const char* type_to_pqtypes_name<int64_t> ( void );
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template const char* type_to_pqtypes_name<uint16_t> ( void );
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template const char* type_to_pqtypes_name<uint32_t> ( void );
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template const char* type_to_pqtypes_name<uint64_t> ( void );
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auto get_pqlib_c_type_struct<std::chrono::system_clock::time_point>::conv (const std::chrono::system_clock::time_point& parParam) -> type {
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static_assert(sizeof(storage) == sizeof(PGtimestamp), "Wrong size for timestamp, please update DATA_SIZE");
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static_assert(alignof(storage) == alignof(PGtimestamp), "Wrong alignment for timestamp, please update type");
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