HB_FULL_DIV
if ((new_divisor < HB_FULL_DIV || new_divisor > HB_LOWEST_DIV) ||
for (index = HB_FULL_DIV; index <= HB_LOWEST_DIV; index++) {
if (cur_divisor == HB_FULL_DIV && new_divisor == HB_HALF_DIV) {
} else if (cur_divisor == HB_HALF_DIV && new_divisor == HB_FULL_DIV) {
} else if (cur_divisor == HB_FULL_DIV && new_divisor > HB_HALF_DIV) {
} else if (cur_divisor > HB_HALF_DIV && new_divisor == HB_FULL_DIV) {