struct ucharp { unsigned char *v, *l, *h; };
#define AREF(var, idx) ((((((((var).v+(idx)) < (var).l) \
|| (((var).v+(idx)+1) > (var).h))) \
&& (__builtin_trap (), 0)), \
(var).v)[(idx)])
struct list
{
struct list *next;
};
struct list *
alloc_list (void)
{
static struct list l;
return &l;
}
int one = 1;
void
foo (struct ucharp cp, struct ucharp lp, struct list **nextp)
{
while (1)
{
struct list *list;
while (AREF (lp, 0) && AREF (cp, AREF (lp, 0)))
++lp.v;
list = alloc_list ();
while (AREF (cp, AREF (lp, 0)))
++lp.v;
if (AREF (lp, 0) == one)
do
++lp.v;
while (AREF (lp, 0) && AREF (cp, AREF (lp, 0)));
*nextp = list;
nextp = &list->next;
if (!*lp.v)
break;
}
}
extern void exit (int);
int
main (void)
{
static unsigned char cp0[] = "\0\0\0\0";
struct ucharp cp = { cp0, cp0, cp0 + sizeof (cp0) };
static unsigned char lp0[] = "\1\1\0\0";
struct ucharp lp = { lp0, lp0, lp0 + sizeof (lp0) };
struct list list;
struct list *nextp = &list;
foo (cp, lp, &nextp);
exit (0);
}