Add support for std::vectors as arrays.

Nested vectors are not supported.

src/pq/CMakeLists.txt

@@ -4,6 +4,7 @@ add_library(${PROJECT_NAME} STATIC
 	connection.cpp
 	databaseexception.cpp
 	resultset.cpp
+	pq_type_helpers.cpp
 )
 
 target_include_directories(${PROJECT_NAME}

src/pq/connection.cpp

@@ -1,4 +1,4 @@
-/* Copyright 2015, Michele Santullo
+/* Copyright 2016, Michele Santullo
  * This file is part of "dindexer".
  *
  * "dindexer" is free software: you can redistribute it and/or modify
@@ -99,7 +99,9 @@ namespace pq {
 	}
 
 	Connection::~Connection() noexcept {
-		disconnect();
+		if (m_localData) {
+			disconnect();
+		}
 	}
 
 	Connection& Connection::operator= (Connection&& parOther) {
@@ -214,7 +216,7 @@ namespace pq {
 	}
 
 	auto Connection::make_params (const std::string* parTypes, ...) -> PGParams {
-		PGParams retval(PQparamCreate(m_localData->connection), &PQparamClear);
+		PGParams retval = make_empty_params();
 		va_list argp;
 
 		va_start(argp, parTypes);
@@ -223,4 +225,11 @@ namespace pq {
 
 		return std::move(retval);
 	}
+
+	auto Connection::make_empty_params() const -> PGParams {
+		assert(is_connected());
+		auto ret = PGParams(PQparamCreate(m_localData->connection), &PQparamClear);
+		assert(ret.get());
+		return std::move(ret);
+	}
 } //namespace pq

src/pq/pq_type_helpers.cpp

@@ -0,0 +1,68 @@
+/* Copyright 2016, Michele Santullo
+ * This file is part of "dindexer".
+ *
+ * "dindexer" 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.
+ *
+ * "dindexer" 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 "dindexer".  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "pq/implem/pq_type_helpers.hpp"
+#include "pq/connection.hpp"
+#include <algorithm>
+#include <cstdarg>
+#include "libpqtypes.h"
+#include <cassert>
+#if !defined(NDEBUG)
+#	include <cstring>
+#endif
+
+namespace pq {
+	namespace implem {
+		get_pqlib_c_type_struct_arr::get_pqlib_c_type_struct_arr (const Connection& parConn) :
+			m_par(parConn.make_empty_params())
+		{
+			static_assert(sizeof(storage) == sizeof(PGarray), "Wrong size for PGarray's static memory");
+			static_assert(alignof(storage) == alignof(PGarray), "Wrong alignment for PGarray's static memory");
+
+			PGarray arr;
+			std::fill(reinterpret_cast<char*>(&arr), reinterpret_cast<char*>(&arr) + sizeof(PGarray), '\0');
+			arr.param = m_par.get();
+
+			std::copy(reinterpret_cast<const char*>(&arr), reinterpret_cast<const char*>(&arr) + sizeof(PGarray), reinterpret_cast<char*>(&m_storage));
+			assert(not std::memcmp(&arr, &m_storage, sizeof(PGarray)));
+			assert(not arr.ndims);
+			assert(not arr.dims[0]);
+			assert(arr.param);
+		}
+
+		get_pqlib_c_type_struct_arr::~get_pqlib_c_type_struct_arr() noexcept {
+		}
+
+		void get_pqlib_c_type_struct_arr::par_reset() {
+			PQparamReset(m_par.get());
+		}
+
+		const void* get_pqlib_c_type_struct_arr::get_return_ptr() {
+			assert(m_par);
+			return reinterpret_cast<const void*>(&m_storage);
+		}
+
+		void get_pqlib_c_type_struct_arr::push_param (const char* parFormat, ...) {
+			//Only one argument is expected, but type and size on the stack is unknown :/
+			va_list argp;
+
+			va_start(argp, parFormat);
+			PQputvf(m_par.get(), nullptr, 0, parFormat, argp);
+			va_end(argp);
+		}
+	} //namespace implem
+} //namespace pq