Mine

void deadbeef(char *buf, int length)
{ 
  switch(length % 4) {
    case 0: do { *buf++ = 0xDE;
    case 1: *buf++ = 0xAD;
    case 2: *buf++ = 0xBE;
    case 3: *buf++ = 0xEF;
            } while((count -= 4) > 4)
  }         
}