1static char *
2begfield (int tab, char *ptr, char *lim, int sword, int schar)
3{
4  if (tab)
5    {
6      while (ptr < lim && sword--)
7	{
8	  while (ptr < lim && *ptr != tab)
9	    ++ptr;
10	  if (ptr < lim)
11	    ++ptr;
12	}
13    }
14  else
15    {
16      while (1)
17	;
18    }
19
20  if (ptr + schar <= lim)
21    ptr += schar;
22
23  return ptr;
24}
25
26main ()
27{
28  char *s = ":ab";
29  char *lim = s + 3;
30  if (begfield (':', s, lim, 1, 1) != s + 2)
31    abort ();
32  exit (0);
33}
34