79 static char_u lastc[2] = {NUL, NUL};	// last character searched for
141     if (pat == NULL || *pat == NUL)  in search_regcomp()
161 	add_to_history(HIST_SEARCH, pat, TRUE, NUL);  in search_regcomp()
238 	rev[len] = NUL;  in reverse_text()
417     (void)skip_regexp_ex(pat, NUL, magic_isset(), NULL, NULL, &magic_val);  in pat_has_uppercase()
419     while (*p != NUL)  in pat_has_uppercase()
431 	    if (p[1] == '_' && p[2] != NUL)  // skip "\_X"  in pat_has_uppercase()
433 	    else if (p[1] == '%' && p[2] != NUL)  // skip "\%X"  in pat_has_uppercase()
435 	    else if (p[1] != NUL)  // skip "\X"  in pat_has_uppercase()
442 	    if (p[1] != NUL)  // skip "_X" and %X  in pat_has_uppercase()
530     if (*s == NUL)  in set_last_search_pat()
800 						  - (ptr[matchpos.col] == NUL)  in searchit()
820 						      && ptr[matchcol] != NUL)  in searchit()
832 				if (ptr[matchcol] != NUL)  in searchit()
843 			    if (ptr[matchcol] == NUL  in searchit()
930 						      && ptr[matchcol] != NUL)  in searchit()
945 				if (ptr[matchcol] != NUL)  in searchit()
954 			    if (ptr[matchcol] == NUL  in searchit()
1311 	if (pat == NULL || *pat == NUL || *pat == search_delim)  in do_search()
1330 	if (pat != NULL && *pat != NUL)	// look for (new) offset  in do_search()
1349 		*p++ = NUL;  in do_search()
1412 		*p = NUL;  in do_search()
1418 	    if (*searchstr == NUL)  in do_search()
1447 		msgbuf[len - 1] = NUL;  in do_search()
1488 			    while (*r != NUL && *r == ' ')  in do_search()
1739 	else if (*p != NUL)	// ignore empty lines  in search_for_exact_line()
1770     if (c != NUL)	// normal search: remember args for repeat  in searchc()
1790 	if (*lastc == NUL && lastc_bytelen == 1)  in searchc()
1972     while (*ptr != NUL)  in find_mps_values()
2135 	initc = NUL;  in findmatchlimit()
2137     else if (initc != '#' && initc != NUL)  in findmatchlimit()
2142 	if (findc == NUL)  in findmatchlimit()
2217 		if (linep[pos.col] == NUL && pos.col)  in findmatchlimit()
2222 		    if (initc == NUL)  in findmatchlimit()
2393 	    if (linep[pos.col] == NUL  in findmatchlimit()
2531 		if (*ptr == '\\' && ptr[1] != NUL)  in findmatchlimit()
2593 	case NUL:  in findmatchlimit()
2801     for (p = curbuf->b_p_mps; *p != NUL; ++p)  in showmatch()
2815 	if (*p == NUL)  in showmatch()
2818     if (*p == NUL)  in showmatch()
2821     if ((lpos = findmatch(NULL, NUL)) == NULL)	    // no match, so beep  in showmatch()
3093     clip_star.vmode = NUL;  in current_search()
3112     return (*p == NUL);  in linewhite()
3394     inc_opt = (*curbuf->b_p_inc == NUL) ? p_inc : curbuf->b_p_inc;  in find_pattern_in_path()
3395     if (*inc_opt != NUL)  in find_pattern_in_path()
3403     if (type == FIND_DEFINE && (*curbuf->b_p_def != NUL || *p_def != NUL))  in find_pattern_in_path()
3405 	def_regmatch.regprog = vim_regcomp(*curbuf->b_p_def == NUL  in find_pattern_in_path()
3551 			p[i] = NUL;  in find_pattern_in_path()
3784 		    IObuff[i] = NUL;  in find_pattern_in_path()
3921 		    && *startp != NUL  in find_pattern_in_path()
3922 		    && *(p = startp + mb_ptr2len(startp)) != NUL)  in find_pattern_in_path()
3955 		line[--i] = NUL;  in find_pattern_in_path()
3957 		line[--i] = NUL;  in find_pattern_in_path()
4036 	    *(p + 1) = NUL;  in show_pat_in_path()
4189 	if (*pattern == NUL)  in f_searchcount()
4194     if (spats[last_idx].pat == NULL || *spats[last_idx].pat == NUL)  in f_searchcount()
4409     if (*fuzpat == NUL || *str == NUL)  in fuzzy_match_recursive()
4414     while (*fuzpat != NUL && *str != NUL)  in fuzzy_match_recursive()
4476     matched = *fuzpat == NUL ? TRUE : FALSE;  in fuzzy_match_recursive()
4548 	    if (*p == NUL)  in fuzzy_match()
4551 	    while (*p != NUL && !VIM_ISWHITE(PTR2CHAR(p)))  in fuzzy_match()
4558 	    if (*p == NUL)		// processed all the words  in fuzzy_match()
4560 	    *p = NUL;  in fuzzy_match()
4695 		while (*p != NUL)  in fuzzy_match_in_list()
4837 		    || *di->di_tv.vval.v_string == NUL)  in do_fuzzymatch()