137 	{NUL, NUL, NUL}
249 	{NUL, NUL, NUL}
358 	{NUL, NUL, NUL}
1761 	{NUL, NUL, NUL}
1835 	for (i = 0; use_defaults ? dp->char1 != NUL  in get_digraph_for_char()
1842 		r[2] = NUL;  in get_digraph_for_char()
1892     return NUL;  in get_digraph()
2039 	msg[mb_char2bytes(char1, msg)] = NUL;  in check_digraph_chars_valid()
2063     while (*str != NUL)  in putdigraph()
2066 	if (*str == NUL)  in putdigraph()
2107     for (i = 0; dp->char1 != NUL && !got_int; ++i)  in listdigraphs()
2176     buf[2] = NUL;  in digraph_getlist_appendpair()
2191     *p = NUL;  in digraph_getlist_appendpair()
2208 	for (i = 0; dp->char1 != NUL && !got_int; ++i)  in digraph_getlist_common()
2310 	*p = NUL;  in printdigraph()
2322 	*p = NUL;  in printdigraph()
2346 	if (*p != NUL)  in get_digraph_chars()
2349 	    if (*p != NUL)  in get_digraph_chars()
2352 		if (*p == NUL)  in get_digraph_chars()
2382     if (*p != NUL)  in digraph_set_common()
2425 	buf[(*mb_char2bytes)(code, buf)] = NUL;  in f_digraph_get()
2428 	buf[1] = NUL;  in f_digraph_get()
2569     if (*curbuf->b_p_keymap == NUL)  in keymap_init()
2650 	if (*p != '"' && *p != NUL && ga_grow(&curbuf->b_kmap_ga, 1) == OK)  in ex_loadkeymap()
2661 		    || *kp->from == NUL || *kp->to == NUL)  in ex_loadkeymap()
2663 		if (kp->to != NULL && *kp->to == NUL)  in ex_loadkeymap()