1  static unsigned short
       2  foo (unsigned char *x, int y)
       3  {
       4    unsigned short r = 0;
       5    int i;
       6    for (i = 0; i < y; i++)
       7      r += x[i];
       8    return r;
       9  }
      10  
      11  int baz (int, unsigned short);
      12  
      13  void
      14  bar (unsigned char *x, unsigned char *y)
      15  {
      16    int i;
      17    unsigned short key = foo (x, 0x10000);
      18    baz (0, 0);
      19    for (i = 0; i < 0x80000; i++)
      20      y[i] = x[baz (i, key)];
      21  }