/* row_seek(offset) */ static VALUE stmt_row_seek(VALUE obj, VALUE offset) { struct mysql_stmt* s = DATA_PTR(obj); MYSQL_ROW_OFFSET prev_offset; if (CLASS_OF(offset) != cMysqlRowOffset) rb_raise(rb_eTypeError, "wrong argument type %s (expected Mysql::RowOffset)", rb_obj_classname(offset)); check_stmt_closed(obj); prev_offset = mysql_stmt_row_seek(s->stmt, DATA_PTR(offset)); return Data_Wrap_Struct(cMysqlRowOffset, 0, NULL, prev_offset); }