added sqlite db backend progress

backends/sqlite/CMakeLists.txt

@@ -2,6 +2,7 @@ set(HEADER
   include/sqlite_connection.hpp
   include/sqlite_error.hpp
   include/sqlite_dialect.hpp
+  include/sqlite_query_result.hpp
 )
 
 set(SOURCES

backends/sqlite/include/sqlite_connection.hpp

@@ -1,6 +1,17 @@
 #ifndef QUERY_SQLITE_CONNECTION_HPP
 #define QUERY_SQLITE_CONNECTION_HPP
 
+#ifdef _MSC_VER
+#ifdef matador_sqlite_EXPORTS
+#define MATADOR_SQLITE_API __declspec(dllexport)
+#else
+#define MATADOR_SQLITE_API __declspec(dllimport)
+#endif
+#pragma warning(disable: 4355)
+#else
+#define MATADOR_SQLITE_API
+#endif
+
 #include "matador/sql/connection_impl.hpp"
 
 #include <sqlite3.h>
@@ -10,7 +21,7 @@ namespace matador::backends::sqlite {
 class sqlite_connection : public matador::sql::connection_impl
 {
 public:
-  explicit sqlite_connection(sql::connection_info info);
+  explicit sqlite_connection(const sql::connection_info &info);
   void open() override;
   void close() override;
   bool is_open() override;
@@ -23,4 +34,12 @@ private:
 };
 
 }
+
+extern "C"
+{
+MATADOR_SQLITE_API matador::sql::connection_impl* create_database(const matador::sql::connection_info &info);
+
+MATADOR_SQLITE_API void destroy_database(matador::sql::connection_impl *db);
+}
+
 #endif //QUERY_SQLITE_CONNECTION_HPP

backends/sqlite/include/sqlite_dialect.hpp

@@ -1,12 +1,19 @@
 #ifndef QUERY_SQLITE_DIALECT_HPP
 #define QUERY_SQLITE_DIALECT_HPP
 
+#ifdef _MSC_VER
+#ifdef matador_sqlite_EXPORTS
+#define MATADOR_SQLITE_API __declspec(dllexport)
+#else
+#define MATADOR_SQLITE_API __declspec(dllimport)
+#endif
+#pragma warning(disable: 4355)
+#else
+#define MATADOR_SQLITE_API
+#endif
+
 #include "matador/sql/dialect.hpp"
 
-namespace matador::backends::sqlite {
-
-}
-
-extern "C" [[maybe_unused]] const matador::sql::dialect* get_dialect();
+extern "C" [[maybe_unused]] MATADOR_SQLITE_API const matador::sql::dialect* get_dialect();
 
 #endif //QUERY_SQLITE_DIALECT_HPP

backends/sqlite/include/sqlite_query_result.hpp

@@ -0,0 +1,13 @@
+#ifndef QUERY_SQLITE_QUERY_RESULT_HPP
+#define QUERY_SQLITE_QUERY_RESULT_HPP
+
+namespace matador::backends::sqlite {
+
+class sqlite_query_result {
+public:
+
+};
+
+}
+
+#endif //QUERY_SQLITE_QUERY_RESULT_HPP

backends/sqlite/src/sqlite_connection.cpp

@@ -5,9 +5,8 @@
 
 namespace matador::backends::sqlite {
 
-sqlite_connection::sqlite_connection(sql::connection_info info)
-: connection_impl(std::move(info)) {
-
+sqlite_connection::sqlite_connection(const sql::connection_info &info)
+: connection_impl(info) {
 }
 
 void sqlite_connection::open()
@@ -30,7 +29,7 @@ void sqlite_connection::close()
 
 bool sqlite_connection::is_open()
 {
-  return false;
+  return sqlite_db_ != nullptr;
 }
 
 void sqlite_connection::execute(const std::string &stmt)
@@ -43,4 +42,18 @@ void sqlite_connection::prepare(const std::string &stmt)
 
 }
 
-}
+}
+
+extern "C"
+{
+MATADOR_SQLITE_API matador::sql::connection_impl *create_database(const matador::sql::connection_info &info)
+{
+  return new matador::backends::sqlite::sqlite_connection(info);
+}
+
+MATADOR_SQLITE_API void destroy_database(matador::sql::connection_impl *db)
+{
+  delete db;
+}
+
+}

backends/sqlite/src/sqlite_dialect.cpp

@@ -2,7 +2,7 @@
 
 [[maybe_unused]] const matador::sql::dialect* get_dialect() {
   using namespace matador::sql;
-  static dialect d {{
+  const static dialect d{{
              { dialect::token_t::BEGIN, "BEGIN TRANSACTION"},
              { dialect::token_t::COMMIT, "COMMIT TRANSACTION"},
              { dialect::token_t::ROLLBACK, "ROLLBACK TRANSACTION"}