(C) Duff's device

void send(int* to, int* from, int count)
{  
  int n = (count+7) / 8;
  switch(count%8) {
  case 0: do { *to++ = *from++;
  case 7:      *to++ = *from++;
  case 6:      *to++ = *from++;
  case 5:      *to++ = *from++;
  case 4:      *to++ = *from++;
  case 3:      *to++ = *from++;
  case 2:      *to++ = *from++;
  case 1:      *to++ = *from++;
             } while (--n>0);
  }
}

'Duff's device' links

• C++

Reference

• 1) Bjarne Stroustrup. the C++ programming language. 3rd edition. Item 6.6.15