1  /* { dg-skip-if "exceeds eBPF stack limit" { bpf-*-* } } */
       2  
       3  struct w
       4  {
       5    int top;
       6    int left;
       7    int height;
       8    int width;
       9    struct w *next;
      10    struct w *parent;
      11    struct w *child;
      12  };
      13  
      14  extern struct w *Qnil;
      15  
      16  void
      17  set_size (struct w *w, int new_size, int nodelete, int set_height)
      18  {
      19    int old_size = set_height? w->height : w->width;
      20  
      21    if (nodelete || w->parent == Qnil)
      22      {
      23        int last_pos, last_old_pos, pos, old_pos, first;
      24        int div_val = old_size << 1;
      25        struct w *c;
      26  
      27        last_pos = first = set_height? w->top : w->left;
      28        last_old_pos = 0;
      29  
      30        for (c = w->child; c != Qnil; c = c->next)
      31  	{
      32  	  if (set_height)
      33  	    old_pos = last_old_pos + c->height;
      34  	  else
      35  	    old_pos = last_old_pos + c->width;
      36  
      37  	  pos = (((old_pos * new_size) << 1) + old_size) / div_val;
      38  	  set_size (c, pos + first - last_pos, 1, set_height);
      39  	  last_pos = pos + first;
      40  	  last_old_pos = old_pos;
      41  	}
      42  
      43        if (!nodelete)
      44  	for (c = w->child; c != Qnil; c = c->next)
      45  	  use (c);
      46      }
      47  }
      48