/* row_seek(offset) */
static VALUE row_seek(VALUE obj, VALUE offset)
{
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_free(obj);
prev_offset = mysql_row_seek(GetMysqlRes(obj), DATA_PTR(offset));
return Data_Wrap_Struct(cMysqlRowOffset, 0, NULL, prev_offset);
}