added a driver type getter for database implementations

src/libstrongswan/database/database.h

@@ -22,6 +22,7 @@
 #define DATABASE_H_
 
 typedef enum db_type_t db_type_t;
+typedef enum db_driver_t db_driver_t;
 typedef struct database_t database_t;
 
 #include <utils/enumerator.h>
@@ -44,6 +45,15 @@ enum db_type_t {
 	DB_NULL,
 };
 
+/**
+ * Database implementation type.
+ */
+enum db_driver_t {
+	/** SQLite database */
+	DB_SQLITE,
+	/** MySQL database */
+	DB_MYSQL,
+};
 
 /**
  * Interface for a database implementation.
@@ -94,6 +104,16 @@ struct database_t {
 	 */
 	int (*execute)(database_t *this, int *rowid, char *sql, ...);
 	
+	/**
+	 * Get the database implementation type.
+	 *
+	 * To allow driver specific SQL or performance optimizations each database
+	 * implementations can be queried for its type.
+	 *
+	 * @return			database implementation type
+	 */
+	db_driver_t (*get_driver)(database_t *this);
+	
 	/**
      * Destroy a database connection.
      */

src/libstrongswan/plugins/mysql/mysql_database.c

@@ -592,6 +592,14 @@ static int execute(private_mysql_database_t *this, int *rowid, char *sql, ...)
 	conn_release(conn);
 	return affected;
 }
+	
+/**
+ * Implementation of database_t.get_driver
+ */
+static db_driver_t get_driver(private_mysql_database_t *this)
+{
+	return DB_MYSQL;
+}
 
 /**
  * Implementation of database_t.destroy
@@ -672,6 +680,7 @@ mysql_database_t *mysql_database_create(char *uri)
 	
 	this->public.db.query = (enumerator_t* (*)(database_t *this, char *sql, ...))query;
 	this->public.db.execute = (int (*)(database_t *this, int *rowid, char *sql, ...))execute;
+	this->public.db.get_driver = (db_driver_t(*)(database_t*))get_driver;
 	this->public.db.destroy = (void(*)(database_t*))destroy;
 	
 	if (!parse_uri(this, uri))

src/libstrongswan/plugins/sqlite/sqlite_database.c

@@ -281,6 +281,14 @@ static int execute(private_sqlite_database_t *this, int *rowid, char *sql, ...)
 	return affected;
 }
 
+/**
+ * Implementation of database_t.get_driver
+ */
+static db_driver_t get_driver(private_sqlite_database_t *this)
+{
+	return DB_SQLITE;
+}
+
 /**
  * Implementation of database_t.destroy
  */
@@ -312,6 +320,7 @@ sqlite_database_t *sqlite_database_create(char *uri)
 	
 	this->public.db.query = (enumerator_t* (*)(database_t *this, char *sql, ...))query;
 	this->public.db.execute = (int (*)(database_t *this, int *rowid, char *sql, ...))execute;
+	this->public.db.get_driver = (db_driver_t(*)(database_t*))get_driver;
 	this->public.db.destroy = (void(*)(database_t*))destroy;
 	
 	this->mutex = mutex_create(MUTEX_RECURSIVE);