added sqlite connection class (progress)

backends/sqlite/include/sqlite_connection.hpp

@@ -0,0 +1,26 @@
+#ifndef QUERY_SQLITE_CONNECTION_HPP
+#define QUERY_SQLITE_CONNECTION_HPP
+
+#include "matador/sql/connection_impl.hpp"
+
+#include <sqlite3.h>
+
+namespace matador::backends::sqlite {
+
+class sqlite_connection : public matador::sql::connection_impl
+{
+public:
+  explicit sqlite_connection(sql::connection_info info);
+  void open() override;
+  void close() override;
+  bool is_open() override;
+
+  void execute(const std::string &stmt) override;
+  void prepare(const std::string &stmt) override;
+
+private:
+  sqlite3 *sqlite_db_{};
+};
+
+}
+#endif //QUERY_SQLITE_CONNECTION_HPP

backends/sqlite/include/sqlite_error.hpp

@@ -0,0 +1,15 @@
+#ifndef QUERY_SQLITE_ERROR_HPP
+#define QUERY_SQLITE_ERROR_HPP
+
+#include <string>
+
+struct sqlite3;
+
+namespace matador::backends::sqlite {
+
+void throw_sqlite_error(int ec, sqlite3 *db, const std::string &source);
+void throw_sqlite_error(int ec, sqlite3 *db, const std::string &source, const std::string &sql);
+
+}
+
+#endif //QUERY_SQLITE_ERROR_HPP