1351     if (*name == NUL)  in termgui_get_color()
1481 	value[1] = NUL;  in f_terminalprops()
1606 	*nr_colors = NUL;  in set_color_count()
2006 	if (bs_p == NULL || *bs_p == NUL)  in set_termname()
2008 	if ((del_p == NULL || *del_p == NUL) &&  in set_termname()
2066 	name[2] = NUL;  in set_termname()
2269     if (T_NAME != NULL && *T_NAME != NUL && tgetent_error(tbuf, T_NAME) == NULL)  in getlinecol()
2315     if (term == NULL || *term == NUL)	    // 'term' not defined yet  in add_termcap_entry()
2372 		if (string != NULL && *string != NUL)  in add_termcap_entry()
2522     if (name != NULL && *name == NUL)  in termcapinit()
2530     if (term == NULL || *term == NUL)  in termcapinit()
2575 	    out_buf[len] = NUL;  in out_flush()
2724 		*s = NUL;  in out_str_cf()
2901     if (*T_CGP == NUL || !can_get_termresponse())  in term_get_winpos()
2963 	      && s[i] != NUL  in term_color()
3043 		&& p[2] == NUL))  in term_bg_default()
3119     if ((which & SAVE_RESTORE_TITLE) && T_CST != NULL && *T_CST != NUL)  in term_push_title()
3125     if ((which & SAVE_RESTORE_ICON) && T_SSI != NULL && *T_SSI != NUL)  in term_push_title()
3138     if ((which & SAVE_RESTORE_TITLE) && T_CRT != NULL && *T_CRT != NUL)  in term_pop_title()
3144     if ((which & SAVE_RESTORE_ICON) && T_SRI != NULL && *T_SRI != NUL)  in term_pop_title()
3166     if (*T_CM == NUL)  in ttest()
3172     if (*T_CS != NUL)  in ttest()
3183 	if (*T_ME == NUL)  in ttest()
3185 	if (*T_SO == NUL || *T_SE == NUL)  in ttest()
3187 	if (*T_US == NUL || *T_UE == NUL)  in ttest()
3189 	if (*T_CZH == NUL || *T_CZR == NUL)  in ttest()
3193 	if (*T_VE == NUL)  in ttest()
3197 	if (*T_ME == NUL)  in ttest()
3205 	if (*T_SO == NUL)  in ttest()
3208 	    if (*T_MR == NUL)  in ttest()
3215 	if (*T_CZH == NUL)  in ttest()
3218 	    if (*T_MR == NUL)  in ttest()
3225 	if (*T_CSB == NUL || *T_CSF == NUL)  in ttest()
3232 	if (*T_CAB == NUL || *T_CAF == NUL)  in ttest()
3239 	if (*T_CSB == NUL && *T_CAB == NUL)  in ttest()
3243 	p_wiv = (*T_XS != NUL);  in ttest()
3329 	if ((c = buf[len++]) == NUL)  in get_bytes_from_buf()
3333 	    if (buf[len] == NUL || buf[len + 1] == NUL)	    // cannot happen?  in get_bytes_from_buf()
3336 		c = NUL;  in get_bytes_from_buf()
3648 	if (focus_mode && p_ek && *T_FE != NUL)  in starttermcap()
3706 	if (focus_mode && p_ek && *T_FD != NUL)  in stoptermcap()
3743 	    && *T_CRV != NUL)  in may_req_termresponse()
3769     if (!can_get_termresponse() || starting != 0 || *T_U7 == NUL)  in check_terminal_behavior()
3793 	buf[mb_char2bytes(0x25bd, buf)] = NUL;  in check_terminal_behavior()
3868 	if (rfg_status.tr_progress == STATUS_GET && *T_RFG != NUL)  in may_req_bg_color()
3881 	if (rbg_status.tr_progress == STATUS_GET && *T_RBG != NUL)  in may_req_bg_color()
3936     return (full_screen && *T_TI != NUL);  in swapping_screen()
3947     if (*T_VS != NUL && *T_CVS != NUL)  in scroll_start()
4039     if (!full_screen || *T_CEI == NUL)  in term_cursor_mode()
4053 	    if (*T_CSR != NUL)  in term_cursor_mode()
4057 	    if (*p != NUL)  in term_cursor_mode()
4066 	if ((forced || showing_mode != INSERT) && *T_CSI != NUL)  in term_cursor_mode()
4083     if (*T_CSC != NUL)  in term_cursor_color()
4111     if (*T_CSH != NUL)  in term_cursor_shape()
4126 	if (do_blink && *T_VS != NUL)  in term_cursor_shape()
4131 	else if (!do_blink && *T_CVS != NUL)  in term_cursor_shape()
4151     if (*T_CSV != NUL && wp->w_width != Columns)  in scroll_region_set()
4164     if (*T_CSV != NUL)  in scroll_region_reset()
4198     PC = NUL;			// set pad character to NUL  in clear_termcodes()
4221     if (string == NULL || *string == NUL)  in add_termcode()
4516     string[new_slen] = NUL;  in put_string_in_typebuf()
4817 	if (term_props[TPR_UNDERLINE_RGB].tpr_status != TPR_YES && *T_8U != NUL)  in handle_version_response()
4840 		&& *T_CSH != NUL  in handle_version_response()
4841 		&& *T_CRS != NUL)  in handle_version_response()
4858 		&& *T_CRC != NUL)  in handle_version_response()
5021     else if (*T_CRV != NUL && ap > argp + 1 && trail == 'c')  in handle_csi()
5370 	if (*p == NUL)  in check_termcode()
5380 	key_name[0] = NUL;	// no key name found yet  in check_termcode()
5381 	key_name[1] = NUL;	// no key name found yet  in check_termcode()
5530 	if (key_name[0] == NUL  in check_termcode()
5580 	    else if ((*T_RBG != NUL || *T_RFG != NUL)  in check_termcode()
5600 	if (key_name[0] == NUL)  in check_termcode()
5740 						     && tp[j + 2] != NUL; ++i)  in check_termcode()
5769 						     && tp[j + 2] != NUL; ++i)  in check_termcode()
5976     while (*src != NUL)  in replace_termcodes()
6067 		if (p == NULL || *p == NUL || STRLEN(p) > 8 * 6)  in replace_termcodes()
6071 		while (*s != NUL)  in replace_termcodes()
6089 	    if (*src == NUL)  in replace_termcodes()
6124     result[dlen] = NUL;  in replace_termcodes()
6170     if (check_for_codes || *T_CRS != NUL)  in gather_termleader()
6174     termleader[len] = NUL;  in gather_termleader()
6180 	    termleader[len] = NUL;  in gather_termleader()
6302 	IObuff[5] = NUL;  in show_one_termcode()
6307     IObuff[len] = NUL;  in show_one_termcode()
6395 	name[2] = NUL;  in got_code_from_term()
6411 	    str[j] = NUL;  in got_code_from_term()
6456 	if (c == NUL)	    // nothing available  in check_for_codes_from_term()