1// SPDX-License-Identifier: GPL-2.0+
2/*
3 *  util.c
4 *
5 *  ORIGINAL AUTHOR: Savio Lam (lam836@cs.cuhk.hk)
6 *  MODIFIED FOR LINUX KERNEL CONFIG BY: William Roadcap (roadcap@cfw.com)
7 */
8
9#include <stdarg.h>
10
11#include "dialog.h"
12
13/* Needed in signal handler in mconf.c */
14int saved_x, saved_y;
15
16struct dialog_info dlg;
17
18static void set_mono_theme(void)
19{
20	dlg.screen.atr = A_NORMAL;
21	dlg.shadow.atr = A_NORMAL;
22	dlg.dialog.atr = A_NORMAL;
23	dlg.title.atr = A_BOLD;
24	dlg.border.atr = A_NORMAL;
25	dlg.button_active.atr = A_REVERSE;
26	dlg.button_inactive.atr = A_DIM;
27	dlg.button_key_active.atr = A_REVERSE;
28	dlg.button_key_inactive.atr = A_BOLD;
29	dlg.button_label_active.atr = A_REVERSE;
30	dlg.button_label_inactive.atr = A_NORMAL;
31	dlg.inputbox.atr = A_NORMAL;
32	dlg.inputbox_border.atr = A_NORMAL;
33	dlg.searchbox.atr = A_NORMAL;
34	dlg.searchbox_title.atr = A_BOLD;
35	dlg.searchbox_border.atr = A_NORMAL;
36	dlg.position_indicator.atr = A_BOLD;
37	dlg.menubox.atr = A_NORMAL;
38	dlg.menubox_border.atr = A_NORMAL;
39	dlg.item.atr = A_NORMAL;
40	dlg.item_selected.atr = A_REVERSE;
41	dlg.tag.atr = A_BOLD;
42	dlg.tag_selected.atr = A_REVERSE;
43	dlg.tag_key.atr = A_BOLD;
44	dlg.tag_key_selected.atr = A_REVERSE;
45	dlg.check.atr = A_BOLD;
46	dlg.check_selected.atr = A_REVERSE;
47	dlg.uarrow.atr = A_BOLD;
48	dlg.darrow.atr = A_BOLD;
49}
50
51#define DLG_COLOR(dialog, f, b, h) \
52do {                               \
53	dlg.dialog.fg = (f);       \
54	dlg.dialog.bg = (b);       \
55	dlg.dialog.hl = (h);       \
56} while (0)
57
58static void set_classic_theme(void)
59{
60	DLG_COLOR(screen,                COLOR_CYAN,   COLOR_BLUE,   true);
61	DLG_COLOR(shadow,                COLOR_BLACK,  COLOR_BLACK,  true);
62	DLG_COLOR(dialog,                COLOR_BLACK,  COLOR_WHITE,  false);
63	DLG_COLOR(title,                 COLOR_YELLOW, COLOR_WHITE,  true);
64	DLG_COLOR(border,                COLOR_WHITE,  COLOR_WHITE,  true);
65	DLG_COLOR(button_active,         COLOR_WHITE,  COLOR_BLUE,   true);
66	DLG_COLOR(button_inactive,       COLOR_BLACK,  COLOR_WHITE,  false);
67	DLG_COLOR(button_key_active,     COLOR_WHITE,  COLOR_BLUE,   true);
68	DLG_COLOR(button_key_inactive,   COLOR_RED,    COLOR_WHITE,  false);
69	DLG_COLOR(button_label_active,   COLOR_YELLOW, COLOR_BLUE,   true);
70	DLG_COLOR(button_label_inactive, COLOR_BLACK,  COLOR_WHITE,  true);
71	DLG_COLOR(inputbox,              COLOR_BLACK,  COLOR_WHITE,  false);
72	DLG_COLOR(inputbox_border,       COLOR_BLACK,  COLOR_WHITE,  false);
73	DLG_COLOR(searchbox,             COLOR_BLACK,  COLOR_WHITE,  false);
74	DLG_COLOR(searchbox_title,       COLOR_YELLOW, COLOR_WHITE,  true);
75	DLG_COLOR(searchbox_border,      COLOR_WHITE,  COLOR_WHITE,  true);
76	DLG_COLOR(position_indicator,    COLOR_YELLOW, COLOR_WHITE,  true);
77	DLG_COLOR(menubox,               COLOR_BLACK,  COLOR_WHITE,  false);
78	DLG_COLOR(menubox_border,        COLOR_WHITE,  COLOR_WHITE,  true);
79	DLG_COLOR(item,                  COLOR_BLACK,  COLOR_WHITE,  false);
80	DLG_COLOR(item_selected,         COLOR_WHITE,  COLOR_BLUE,   true);
81	DLG_COLOR(tag,                   COLOR_YELLOW, COLOR_WHITE,  true);
82	DLG_COLOR(tag_selected,          COLOR_YELLOW, COLOR_BLUE,   true);
83	DLG_COLOR(tag_key,               COLOR_YELLOW, COLOR_WHITE,  true);
84	DLG_COLOR(tag_key_selected,      COLOR_YELLOW, COLOR_BLUE,   true);
85	DLG_COLOR(check,                 COLOR_BLACK,  COLOR_WHITE,  false);
86	DLG_COLOR(check_selected,        COLOR_WHITE,  COLOR_BLUE,   true);
87	DLG_COLOR(uarrow,                COLOR_GREEN,  COLOR_WHITE,  true);
88	DLG_COLOR(darrow,                COLOR_GREEN,  COLOR_WHITE,  true);
89}
90
91static void set_blackbg_theme(void)
92{
93	DLG_COLOR(screen, COLOR_RED,   COLOR_BLACK, true);
94	DLG_COLOR(shadow, COLOR_BLACK, COLOR_BLACK, false);
95	DLG_COLOR(dialog, COLOR_WHITE, COLOR_BLACK, false);
96	DLG_COLOR(title,  COLOR_RED,   COLOR_BLACK, false);
97	DLG_COLOR(border, COLOR_BLACK, COLOR_BLACK, true);
98
99	DLG_COLOR(button_active,         COLOR_YELLOW, COLOR_RED,   false);
100	DLG_COLOR(button_inactive,       COLOR_YELLOW, COLOR_BLACK, false);
101	DLG_COLOR(button_key_active,     COLOR_YELLOW, COLOR_RED,   true);
102	DLG_COLOR(button_key_inactive,   COLOR_RED,    COLOR_BLACK, false);
103	DLG_COLOR(button_label_active,   COLOR_WHITE,  COLOR_RED,   false);
104	DLG_COLOR(button_label_inactive, COLOR_BLACK,  COLOR_BLACK, true);
105
106	DLG_COLOR(inputbox,         COLOR_YELLOW, COLOR_BLACK, false);
107	DLG_COLOR(inputbox_border,  COLOR_YELLOW, COLOR_BLACK, false);
108
109	DLG_COLOR(searchbox,        COLOR_YELLOW, COLOR_BLACK, false);
110	DLG_COLOR(searchbox_title,  COLOR_YELLOW, COLOR_BLACK, true);
111	DLG_COLOR(searchbox_border, COLOR_BLACK,  COLOR_BLACK, true);
112
113	DLG_COLOR(position_indicator, COLOR_RED, COLOR_BLACK,  false);
114
115	DLG_COLOR(menubox,          COLOR_YELLOW, COLOR_BLACK, false);
116	DLG_COLOR(menubox_border,   COLOR_BLACK,  COLOR_BLACK, true);
117
118	DLG_COLOR(item,             COLOR_WHITE, COLOR_BLACK, false);
119	DLG_COLOR(item_selected,    COLOR_WHITE, COLOR_RED,   false);
120
121	DLG_COLOR(tag,              COLOR_RED,    COLOR_BLACK, false);
122	DLG_COLOR(tag_selected,     COLOR_YELLOW, COLOR_RED,   true);
123	DLG_COLOR(tag_key,          COLOR_RED,    COLOR_BLACK, false);
124	DLG_COLOR(tag_key_selected, COLOR_YELLOW, COLOR_RED,   true);
125
126	DLG_COLOR(check,            COLOR_YELLOW, COLOR_BLACK, false);
127	DLG_COLOR(check_selected,   COLOR_YELLOW, COLOR_RED,   true);
128
129	DLG_COLOR(uarrow, COLOR_RED, COLOR_BLACK, false);
130	DLG_COLOR(darrow, COLOR_RED, COLOR_BLACK, false);
131}
132
133static void set_bluetitle_theme(void)
134{
135	set_classic_theme();
136	DLG_COLOR(title,               COLOR_BLUE,   COLOR_WHITE, true);
137	DLG_COLOR(button_key_active,   COLOR_YELLOW, COLOR_BLUE,  true);
138	DLG_COLOR(button_label_active, COLOR_WHITE,  COLOR_BLUE,  true);
139	DLG_COLOR(searchbox_title,     COLOR_BLUE,   COLOR_WHITE, true);
140	DLG_COLOR(position_indicator,  COLOR_BLUE,   COLOR_WHITE, true);
141	DLG_COLOR(tag,                 COLOR_BLUE,   COLOR_WHITE, true);
142	DLG_COLOR(tag_key,             COLOR_BLUE,   COLOR_WHITE, true);
143
144}
145
146/*
147 * Select color theme
148 */
149static int set_theme(const char *theme)
150{
151	int use_color = 1;
152	if (!theme)
153		set_bluetitle_theme();
154	else if (strcmp(theme, "classic") == 0)
155		set_classic_theme();
156	else if (strcmp(theme, "bluetitle") == 0)
157		set_bluetitle_theme();
158	else if (strcmp(theme, "blackbg") == 0)
159		set_blackbg_theme();
160	else if (strcmp(theme, "mono") == 0)
161		use_color = 0;
162
163	return use_color;
164}
165
166static void init_one_color(struct dialog_color *color)
167{
168	static int pair = 0;
169
170	pair++;
171	init_pair(pair, color->fg, color->bg);
172	if (color->hl)
173		color->atr = A_BOLD | COLOR_PAIR(pair);
174	else
175		color->atr = COLOR_PAIR(pair);
176}
177
178static void init_dialog_colors(void)
179{
180	init_one_color(&dlg.screen);
181	init_one_color(&dlg.shadow);
182	init_one_color(&dlg.dialog);
183	init_one_color(&dlg.title);
184	init_one_color(&dlg.border);
185	init_one_color(&dlg.button_active);
186	init_one_color(&dlg.button_inactive);
187	init_one_color(&dlg.button_key_active);
188	init_one_color(&dlg.button_key_inactive);
189	init_one_color(&dlg.button_label_active);
190	init_one_color(&dlg.button_label_inactive);
191	init_one_color(&dlg.inputbox);
192	init_one_color(&dlg.inputbox_border);
193	init_one_color(&dlg.searchbox);
194	init_one_color(&dlg.searchbox_title);
195	init_one_color(&dlg.searchbox_border);
196	init_one_color(&dlg.position_indicator);
197	init_one_color(&dlg.menubox);
198	init_one_color(&dlg.menubox_border);
199	init_one_color(&dlg.item);
200	init_one_color(&dlg.item_selected);
201	init_one_color(&dlg.tag);
202	init_one_color(&dlg.tag_selected);
203	init_one_color(&dlg.tag_key);
204	init_one_color(&dlg.tag_key_selected);
205	init_one_color(&dlg.check);
206	init_one_color(&dlg.check_selected);
207	init_one_color(&dlg.uarrow);
208	init_one_color(&dlg.darrow);
209}
210
211/*
212 * Setup for color display
213 */
214static void color_setup(const char *theme)
215{
216	int use_color;
217
218	use_color = set_theme(theme);
219	if (use_color && has_colors()) {
220		start_color();
221		init_dialog_colors();
222	} else
223		set_mono_theme();
224}
225
226/*
227 * Set window to attribute 'attr'
228 */
229void attr_clear(WINDOW * win, int height, int width, chtype attr)
230{
231	int i, j;
232
233	wattrset(win, attr);
234	for (i = 0; i < height; i++) {
235		wmove(win, i, 0);
236		for (j = 0; j < width; j++)
237			waddch(win, ' ');
238	}
239	touchwin(win);
240}
241
242void dialog_clear(void)
243{
244	int lines, columns;
245
246	lines = getmaxy(stdscr);
247	columns = getmaxx(stdscr);
248
249	attr_clear(stdscr, lines, columns, dlg.screen.atr);
250	/* Display background title if it exists ... - SLH */
251	if (dlg.backtitle != NULL) {
252		int i, len = 0, skip = 0;
253		struct subtitle_list *pos;
254
255		wattrset(stdscr, dlg.screen.atr);
256		mvwaddstr(stdscr, 0, 1, (char *)dlg.backtitle);
257
258		for (pos = dlg.subtitles; pos != NULL; pos = pos->next) {
259			/* 3 is for the arrow and spaces */
260			len += strlen(pos->text) + 3;
261		}
262
263		wmove(stdscr, 1, 1);
264		if (len > columns - 2) {
265			const char *ellipsis = "[...] ";
266			waddstr(stdscr, ellipsis);
267			skip = len - (columns - 2 - strlen(ellipsis));
268		}
269
270		for (pos = dlg.subtitles; pos != NULL; pos = pos->next) {
271			if (skip == 0)
272				waddch(stdscr, ACS_RARROW);
273			else
274				skip--;
275
276			if (skip == 0)
277				waddch(stdscr, ' ');
278			else
279				skip--;
280
281			if (skip < strlen(pos->text)) {
282				waddstr(stdscr, pos->text + skip);
283				skip = 0;
284			} else
285				skip -= strlen(pos->text);
286
287			if (skip == 0)
288				waddch(stdscr, ' ');
289			else
290				skip--;
291		}
292
293		for (i = len + 1; i < columns - 1; i++)
294			waddch(stdscr, ACS_HLINE);
295	}
296	wnoutrefresh(stdscr);
297}
298
299/*
300 * Do some initialization for dialog
301 */
302int init_dialog(const char *backtitle)
303{
304	int height, width;
305
306	initscr();		/* Init curses */
307
308	/* Get current cursor position for signal handler in mconf.c */
309	getyx(stdscr, saved_y, saved_x);
310
311	getmaxyx(stdscr, height, width);
312	if (height < WINDOW_HEIGTH_MIN || width < WINDOW_WIDTH_MIN) {
313		endwin();
314		return -ERRDISPLAYTOOSMALL;
315	}
316
317	dlg.backtitle = backtitle;
318	color_setup(getenv("MENUCONFIG_COLOR"));
319
320	keypad(stdscr, TRUE);
321	cbreak();
322	noecho();
323	dialog_clear();
324
325	return 0;
326}
327
328void set_dialog_backtitle(const char *backtitle)
329{
330	dlg.backtitle = backtitle;
331}
332
333void set_dialog_subtitles(struct subtitle_list *subtitles)
334{
335	dlg.subtitles = subtitles;
336}
337
338/*
339 * End using dialog functions.
340 */
341void end_dialog(int x, int y)
342{
343	/* move cursor back to original position */
344	move(y, x);
345	refresh();
346	endwin();
347}
348
349/* Print the title of the dialog. Center the title and truncate
350 * tile if wider than dialog (- 2 chars).
351 **/
352void print_title(WINDOW *dialog, const char *title, int width)
353{
354	if (title) {
355		int tlen = MIN(width - 2, strlen(title));
356		wattrset(dialog, dlg.title.atr);
357		mvwaddch(dialog, 0, (width - tlen) / 2 - 1, ' ');
358		mvwaddnstr(dialog, 0, (width - tlen)/2, title, tlen);
359		waddch(dialog, ' ');
360	}
361}
362
363/*
364 * Print a string of text in a window, automatically wrap around to the
365 * next line if the string is too long to fit on one line. Newline
366 * characters '\n' are propperly processed.  We start on a new line
367 * if there is no room for at least 4 nonblanks following a double-space.
368 */
369void print_autowrap(WINDOW * win, const char *prompt, int width, int y, int x)
370{
371	int newl, cur_x, cur_y;
372	int prompt_len, room, wlen;
373	char tempstr[MAX_LEN + 1], *word, *sp, *sp2, *newline_separator = 0;
374
375	strcpy(tempstr, prompt);
376
377	prompt_len = strlen(tempstr);
378
379	if (prompt_len <= width - x * 2) {	/* If prompt is short */
380		wmove(win, y, (width - prompt_len) / 2);
381		waddstr(win, tempstr);
382	} else {
383		cur_x = x;
384		cur_y = y;
385		newl = 1;
386		word = tempstr;
387		while (word && *word) {
388			sp = strpbrk(word, "\n ");
389			if (sp && *sp == '\n')
390				newline_separator = sp;
391
392			if (sp)
393				*sp++ = 0;
394
395			/* Wrap to next line if either the word does not fit,
396			   or it is the first word of a new sentence, and it is
397			   short, and the next word does not fit. */
398			room = width - cur_x;
399			wlen = strlen(word);
400			if (wlen > room ||
401			    (newl && wlen < 4 && sp
402			     && wlen + 1 + strlen(sp) > room
403			     && (!(sp2 = strpbrk(sp, "\n "))
404				 || wlen + 1 + (sp2 - sp) > room))) {
405				cur_y++;
406				cur_x = x;
407			}
408			wmove(win, cur_y, cur_x);
409			waddstr(win, word);
410			getyx(win, cur_y, cur_x);
411
412			/* Move to the next line if the word separator was a newline */
413			if (newline_separator) {
414				cur_y++;
415				cur_x = x;
416				newline_separator = 0;
417			} else
418				cur_x++;
419
420			if (sp && *sp == ' ') {
421				cur_x++;	/* double space */
422				while (*++sp == ' ') ;
423				newl = 1;
424			} else
425				newl = 0;
426			word = sp;
427		}
428	}
429}
430
431/*
432 * Print a button
433 */
434void print_button(WINDOW * win, const char *label, int y, int x, int selected)
435{
436	int i, temp;
437
438	wmove(win, y, x);
439	wattrset(win, selected ? dlg.button_active.atr
440		 : dlg.button_inactive.atr);
441	waddstr(win, "<");
442	temp = strspn(label, " ");
443	label += temp;
444	wattrset(win, selected ? dlg.button_label_active.atr
445		 : dlg.button_label_inactive.atr);
446	for (i = 0; i < temp; i++)
447		waddch(win, ' ');
448	wattrset(win, selected ? dlg.button_key_active.atr
449		 : dlg.button_key_inactive.atr);
450	waddch(win, label[0]);
451	wattrset(win, selected ? dlg.button_label_active.atr
452		 : dlg.button_label_inactive.atr);
453	waddstr(win, (char *)label + 1);
454	wattrset(win, selected ? dlg.button_active.atr
455		 : dlg.button_inactive.atr);
456	waddstr(win, ">");
457	wmove(win, y, x + temp + 1);
458}
459
460/*
461 * Draw a rectangular box with line drawing characters
462 */
463void
464draw_box(WINDOW * win, int y, int x, int height, int width,
465	 chtype box, chtype border)
466{
467	int i, j;
468
469	wattrset(win, 0);
470	for (i = 0; i < height; i++) {
471		wmove(win, y + i, x);
472		for (j = 0; j < width; j++)
473			if (!i && !j)
474				waddch(win, border | ACS_ULCORNER);
475			else if (i == height - 1 && !j)
476				waddch(win, border | ACS_LLCORNER);
477			else if (!i && j == width - 1)
478				waddch(win, box | ACS_URCORNER);
479			else if (i == height - 1 && j == width - 1)
480				waddch(win, box | ACS_LRCORNER);
481			else if (!i)
482				waddch(win, border | ACS_HLINE);
483			else if (i == height - 1)
484				waddch(win, box | ACS_HLINE);
485			else if (!j)
486				waddch(win, border | ACS_VLINE);
487			else if (j == width - 1)
488				waddch(win, box | ACS_VLINE);
489			else
490				waddch(win, box | ' ');
491	}
492}
493
494/*
495 * Draw shadows along the right and bottom edge to give a more 3D look
496 * to the boxes
497 */
498void draw_shadow(WINDOW * win, int y, int x, int height, int width)
499{
500	int i;
501
502	if (has_colors()) {	/* Whether terminal supports color? */
503		wattrset(win, dlg.shadow.atr);
504		wmove(win, y + height, x + 2);
505		for (i = 0; i < width; i++)
506			waddch(win, winch(win) & A_CHARTEXT);
507		for (i = y + 1; i < y + height + 1; i++) {
508			wmove(win, i, x + width);
509			waddch(win, winch(win) & A_CHARTEXT);
510			waddch(win, winch(win) & A_CHARTEXT);
511		}
512		wnoutrefresh(win);
513	}
514}
515
516/*
517 *  Return the position of the first alphabetic character in a string.
518 */
519int first_alpha(const char *string, const char *exempt)
520{
521	int i, in_paren = 0, c;
522
523	for (i = 0; i < strlen(string); i++) {
524		c = tolower(string[i]);
525
526		if (strchr("<[(", c))
527			++in_paren;
528		if (strchr(">])", c) && in_paren > 0)
529			--in_paren;
530
531		if ((!in_paren) && isalpha(c) && strchr(exempt, c) == 0)
532			return i;
533	}
534
535	return 0;
536}
537
538/*
539 * ncurses uses ESC to detect escaped char sequences. This resutl in
540 * a small timeout before ESC is actually delivered to the application.
541 * lxdialog suggest <ESC> <ESC> which is correctly translated to two
542 * times esc. But then we need to ignore the second esc to avoid stepping
543 * out one menu too much. Filter away all escaped key sequences since
544 * keypad(FALSE) turn off ncurses support for escape sequences - and thats
545 * needed to make notimeout() do as expected.
546 */
547int on_key_esc(WINDOW *win)
548{
549	int key;
550	int key2;
551	int key3;
552
553	nodelay(win, TRUE);
554	keypad(win, FALSE);
555	key = wgetch(win);
556	key2 = wgetch(win);
557	do {
558		key3 = wgetch(win);
559	} while (key3 != ERR);
560	nodelay(win, FALSE);
561	keypad(win, TRUE);
562	if (key == KEY_ESC && key2 == ERR)
563		return KEY_ESC;
564	else if (key != ERR && key != KEY_ESC && key2 == ERR)
565		ungetch(key);
566
567	return -1;
568}
569
570/* redraw screen in new size */
571int on_key_resize(void)
572{
573	dialog_clear();
574	return KEY_RESIZE;
575}
576
577struct dialog_list *item_cur;
578struct dialog_list item_nil;
579struct dialog_list *item_head;
580
581void item_reset(void)
582{
583	struct dialog_list *p, *next;
584
585	for (p = item_head; p; p = next) {
586		next = p->next;
587		free(p);
588	}
589	item_head = NULL;
590	item_cur = &item_nil;
591}
592
593void item_make(const char *fmt, ...)
594{
595	va_list ap;
596	struct dialog_list *p = malloc(sizeof(*p));
597
598	if (item_head)
599		item_cur->next = p;
600	else
601		item_head = p;
602	item_cur = p;
603	memset(p, 0, sizeof(*p));
604
605	va_start(ap, fmt);
606	vsnprintf(item_cur->node.str, sizeof(item_cur->node.str), fmt, ap);
607	va_end(ap);
608}
609
610void item_add_str(const char *fmt, ...)
611{
612	va_list ap;
613	size_t avail;
614
615	avail = sizeof(item_cur->node.str) - strlen(item_cur->node.str);
616
617	va_start(ap, fmt);
618	vsnprintf(item_cur->node.str + strlen(item_cur->node.str),
619		  avail, fmt, ap);
620	item_cur->node.str[sizeof(item_cur->node.str) - 1] = '\0';
621	va_end(ap);
622}
623
624void item_set_tag(char tag)
625{
626	item_cur->node.tag = tag;
627}
628void item_set_data(void *ptr)
629{
630	item_cur->node.data = ptr;
631}
632
633void item_set_selected(int val)
634{
635	item_cur->node.selected = val;
636}
637
638int item_activate_selected(void)
639{
640	item_foreach()
641		if (item_is_selected())
642			return 1;
643	return 0;
644}
645
646void *item_data(void)
647{
648	return item_cur->node.data;
649}
650
651char item_tag(void)
652{
653	return item_cur->node.tag;
654}
655
656int item_count(void)
657{
658	int n = 0;
659	struct dialog_list *p;
660
661	for (p = item_head; p; p = p->next)
662		n++;
663	return n;
664}
665
666void item_set(int n)
667{
668	int i = 0;
669	item_foreach()
670		if (i++ == n)
671			return;
672}
673
674int item_n(void)
675{
676	int n = 0;
677	struct dialog_list *p;
678
679	for (p = item_head; p; p = p->next) {
680		if (p == item_cur)
681			return n;
682		n++;
683	}
684	return 0;
685}
686
687const char *item_str(void)
688{
689	return item_cur->node.str;
690}
691
692int item_is_selected(void)
693{
694	return (item_cur->node.selected != 0);
695}
696
697int item_is_tag(char tag)
698{
699	return (item_cur->node.tag == tag);
700}
701