267   double total_angle = end_angle - start_angle;  in dashed_arc()  local
268   while (total_angle < 0)  in dashed_arc()
269     total_angle += M_PI + M_PI;  in dashed_arc()
270   if (total_angle <= dash_angle*2.0) {  in dashed_arc()
274   int ndashes = int((total_angle - dash_angle)/(dash_angle*2.0) + .5);  in dashed_arc()
275   double dash_and_gap_angle = (total_angle - dash_angle)/ndashes;  in dashed_arc()
295   double total_angle = atan2(end_offset.y, end_offset.x) - start_angle;  in dotted_arc()  local
296   while (total_angle < 0)  in dotted_arc()
297     total_angle += M_PI + M_PI;  in dotted_arc()
299   int ndots = int(total_angle/(lt.dash_width/rad) + .5);  in dotted_arc()
304       double a = start_angle + (total_angle*i)/ndots;  in dotted_arc()