/* There must be at least one stack segment. Therefore it is
a fatal error if "trailer" is null. */
- if (trailer == 0)
+ if (trailer == NULL)
abort ();
/* Discard segments that do not contain our argument address. */
- while (trailer != 0)
+ while (trailer != NULL)
{
block = (long *) trailer->this_address;
size = trailer->this_size;
- if (block == 0 || size == 0)
+ if (block == NULL || size == 0)
abort ();
trailer = (struct stk_trailer *) trailer->link;
if ((block <= address) && (address < (block + size)))
result = address - block;
- if (trailer == 0)
+ if (trailer == NULL)
{
return result;
}
result += trailer->this_size;
trailer = (struct stk_trailer *) trailer->link;
}
- while (trailer != 0);
+ while (trailer != NULL);
/* We are done. Note that if you present a bogus address (one
not in any segment), you will get a different number back, formed