66     unsigned char *ti, *si, *end;  in map_and()  local
67     ti = t->map;  in map_and()
69     end = ti + (t->size < s->size ? t->size : s->size);  in map_and()
70     while (ti < end)  in map_and()
71 	*ti++ &= *si++;  in map_and()
78     unsigned char *ti, *si, *end;  in map_or()  local
81     ti = t->map;  in map_or()
83     end = ti + (t->size < s->size ? t->size : s->size);  in map_or()
84     while (ti < end)  in map_or()
85 	*ti++ |= *si++;  in map_or()
92     unsigned char *ti, *si, *end;  in map_subtract()  local
93     ti = t->map;  in map_subtract()
95     end = ti + (t->size < s->size ? t->size : s->size);  in map_subtract()
96     while (ti < end)  in map_subtract()
97 	*ti++ &= ~*si++;  in map_subtract()