1 /* $OpenBSD: screen.c,v 1.85 2024/03/21 11:26:28 nicm Exp $ */
2
3 /*
4 * Copyright (c) 2007 Nicholas Marriott <nicholas.marriott@gmail.com>
5 *
6 * Permission to use, copy, modify, and distribute this software for any
7 * purpose with or without fee is hereby granted, provided that the above
8 * copyright notice and this permission notice appear in all copies.
9 *
10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14 * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
15 * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
16 * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 */
18
19 #include <sys/types.h>
20
21 #include <stdlib.h>
22 #include <string.h>
23 #include <unistd.h>
24 #include <vis.h>
25
26 #include "tmux.h"
27
28 /* Selected area in screen. */
29 struct screen_sel {
30 int hidden;
31 int rectangle;
32 int modekeys;
33
34 u_int sx;
35 u_int sy;
36
37 u_int ex;
38 u_int ey;
39
40 struct grid_cell cell;
41 };
42
43 /* Entry on title stack. */
44 struct screen_title_entry {
45 char *text;
46
47 TAILQ_ENTRY(screen_title_entry) entry;
48 };
49 TAILQ_HEAD(screen_titles, screen_title_entry);
50
51 static void screen_resize_y(struct screen *, u_int, int, u_int *);
52 static void screen_reflow(struct screen *, u_int, u_int *, u_int *, int);
53
54 /* Free titles stack. */
55 static void
screen_free_titles(struct screen * s)56 screen_free_titles(struct screen *s)
57 {
58 struct screen_title_entry *title_entry;
59
60 if (s->titles == NULL)
61 return;
62
63 while ((title_entry = TAILQ_FIRST(s->titles)) != NULL) {
64 TAILQ_REMOVE(s->titles, title_entry, entry);
65 free(title_entry->text);
66 free(title_entry);
67 }
68
69 free(s->titles);
70 s->titles = NULL;
71 }
72
73 /* Create a new screen. */
74 void
screen_init(struct screen * s,u_int sx,u_int sy,u_int hlimit)75 screen_init(struct screen *s, u_int sx, u_int sy, u_int hlimit)
76 {
77 s->grid = grid_create(sx, sy, hlimit);
78 s->saved_grid = NULL;
79
80 s->title = xstrdup("");
81 s->titles = NULL;
82 s->path = NULL;
83
84 s->cstyle = SCREEN_CURSOR_DEFAULT;
85 s->default_cstyle = SCREEN_CURSOR_DEFAULT;
86 s->mode = MODE_CURSOR;
87 s->default_mode = 0;
88 s->ccolour = -1;
89 s->default_ccolour = -1;
90 s->tabs = NULL;
91 s->sel = NULL;
92
93 s->write_list = NULL;
94 s->hyperlinks = NULL;
95
96 screen_reinit(s);
97 }
98
99 /* Reinitialise screen. */
100 void
screen_reinit(struct screen * s)101 screen_reinit(struct screen *s)
102 {
103 s->cx = 0;
104 s->cy = 0;
105
106 s->rupper = 0;
107 s->rlower = screen_size_y(s) - 1;
108
109 s->mode = MODE_CURSOR|MODE_WRAP|(s->mode & MODE_CRLF);
110 if (options_get_number(global_options, "extended-keys") == 2)
111 s->mode |= MODE_KEXTENDED;
112
113 if (s->saved_grid != NULL)
114 screen_alternate_off(s, NULL, 0);
115 s->saved_cx = UINT_MAX;
116 s->saved_cy = UINT_MAX;
117
118 screen_reset_tabs(s);
119
120 grid_clear_lines(s->grid, s->grid->hsize, s->grid->sy, 8);
121
122 screen_clear_selection(s);
123 screen_free_titles(s);
124 screen_reset_hyperlinks(s);
125 }
126
127 /* Reset hyperlinks of a screen. */
128 void
screen_reset_hyperlinks(struct screen * s)129 screen_reset_hyperlinks(struct screen *s)
130 {
131 if (s->hyperlinks == NULL)
132 s->hyperlinks = hyperlinks_init();
133 else
134 hyperlinks_reset(s->hyperlinks);
135 }
136
137 /* Destroy a screen. */
138 void
screen_free(struct screen * s)139 screen_free(struct screen *s)
140 {
141 free(s->sel);
142 free(s->tabs);
143 free(s->path);
144 free(s->title);
145
146 if (s->write_list != NULL)
147 screen_write_free_list(s);
148
149 if (s->saved_grid != NULL)
150 grid_destroy(s->saved_grid);
151 grid_destroy(s->grid);
152
153 if (s->hyperlinks != NULL)
154 hyperlinks_free(s->hyperlinks);
155 screen_free_titles(s);
156 }
157
158 /* Reset tabs to default, eight spaces apart. */
159 void
screen_reset_tabs(struct screen * s)160 screen_reset_tabs(struct screen *s)
161 {
162 u_int i;
163
164 free(s->tabs);
165
166 if ((s->tabs = bit_alloc(screen_size_x(s))) == NULL)
167 fatal("bit_alloc failed");
168 for (i = 8; i < screen_size_x(s); i += 8)
169 bit_set(s->tabs, i);
170 }
171
172 /* Set screen cursor style and mode. */
173 void
screen_set_cursor_style(u_int style,enum screen_cursor_style * cstyle,int * mode)174 screen_set_cursor_style(u_int style, enum screen_cursor_style *cstyle,
175 int *mode)
176 {
177 switch (style) {
178 case 0:
179 *cstyle = SCREEN_CURSOR_DEFAULT;
180 break;
181 case 1:
182 *cstyle = SCREEN_CURSOR_BLOCK;
183 *mode |= MODE_CURSOR_BLINKING;
184 break;
185 case 2:
186 *cstyle = SCREEN_CURSOR_BLOCK;
187 *mode &= ~MODE_CURSOR_BLINKING;
188 break;
189 case 3:
190 *cstyle = SCREEN_CURSOR_UNDERLINE;
191 *mode |= MODE_CURSOR_BLINKING;
192 break;
193 case 4:
194 *cstyle = SCREEN_CURSOR_UNDERLINE;
195 *mode &= ~MODE_CURSOR_BLINKING;
196 break;
197 case 5:
198 *cstyle = SCREEN_CURSOR_BAR;
199 *mode |= MODE_CURSOR_BLINKING;
200 break;
201 case 6:
202 *cstyle = SCREEN_CURSOR_BAR;
203 *mode &= ~MODE_CURSOR_BLINKING;
204 break;
205 }
206 }
207
208 /* Set screen cursor colour. */
209 void
screen_set_cursor_colour(struct screen * s,int colour)210 screen_set_cursor_colour(struct screen *s, int colour)
211 {
212 s->ccolour = colour;
213 }
214
215 /* Set screen title. */
216 int
screen_set_title(struct screen * s,const char * title)217 screen_set_title(struct screen *s, const char *title)
218 {
219 if (!utf8_isvalid(title))
220 return (0);
221 free(s->title);
222 s->title = xstrdup(title);
223 return (1);
224 }
225
226 /* Set screen path. */
227 void
screen_set_path(struct screen * s,const char * path)228 screen_set_path(struct screen *s, const char *path)
229 {
230 free(s->path);
231 utf8_stravis(&s->path, path, VIS_OCTAL|VIS_CSTYLE|VIS_TAB|VIS_NL);
232 }
233
234 /* Push the current title onto the stack. */
235 void
screen_push_title(struct screen * s)236 screen_push_title(struct screen *s)
237 {
238 struct screen_title_entry *title_entry;
239
240 if (s->titles == NULL) {
241 s->titles = xmalloc(sizeof *s->titles);
242 TAILQ_INIT(s->titles);
243 }
244 title_entry = xmalloc(sizeof *title_entry);
245 title_entry->text = xstrdup(s->title);
246 TAILQ_INSERT_HEAD(s->titles, title_entry, entry);
247 }
248
249 /*
250 * Pop a title from the stack and set it as the screen title. If the stack is
251 * empty, do nothing.
252 */
253 void
screen_pop_title(struct screen * s)254 screen_pop_title(struct screen *s)
255 {
256 struct screen_title_entry *title_entry;
257
258 if (s->titles == NULL)
259 return;
260
261 title_entry = TAILQ_FIRST(s->titles);
262 if (title_entry != NULL) {
263 screen_set_title(s, title_entry->text);
264
265 TAILQ_REMOVE(s->titles, title_entry, entry);
266 free(title_entry->text);
267 free(title_entry);
268 }
269 }
270
271 /* Resize screen with options. */
272 void
screen_resize_cursor(struct screen * s,u_int sx,u_int sy,int reflow,int eat_empty,int cursor)273 screen_resize_cursor(struct screen *s, u_int sx, u_int sy, int reflow,
274 int eat_empty, int cursor)
275 {
276 u_int cx = s->cx, cy = s->grid->hsize + s->cy;
277
278 if (s->write_list != NULL)
279 screen_write_free_list(s);
280
281 log_debug("%s: new size %ux%u, now %ux%u (cursor %u,%u = %u,%u)",
282 __func__, sx, sy, screen_size_x(s), screen_size_y(s), s->cx, s->cy,
283 cx, cy);
284
285 if (sx < 1)
286 sx = 1;
287 if (sy < 1)
288 sy = 1;
289
290 if (sx != screen_size_x(s)) {
291 s->grid->sx = sx;
292 screen_reset_tabs(s);
293 } else
294 reflow = 0;
295
296 if (sy != screen_size_y(s))
297 screen_resize_y(s, sy, eat_empty, &cy);
298
299 if (reflow)
300 screen_reflow(s, sx, &cx, &cy, cursor);
301
302 if (cy >= s->grid->hsize) {
303 s->cx = cx;
304 s->cy = cy - s->grid->hsize;
305 } else {
306 s->cx = 0;
307 s->cy = 0;
308 }
309
310 log_debug("%s: cursor finished at %u,%u = %u,%u", __func__, s->cx,
311 s->cy, cx, cy);
312
313 if (s->write_list != NULL)
314 screen_write_make_list(s);
315 }
316
317 /* Resize screen. */
318 void
screen_resize(struct screen * s,u_int sx,u_int sy,int reflow)319 screen_resize(struct screen *s, u_int sx, u_int sy, int reflow)
320 {
321 screen_resize_cursor(s, sx, sy, reflow, 1, 1);
322 }
323
324 static void
screen_resize_y(struct screen * s,u_int sy,int eat_empty,u_int * cy)325 screen_resize_y(struct screen *s, u_int sy, int eat_empty, u_int *cy)
326 {
327 struct grid *gd = s->grid;
328 u_int needed, available, oldy, i;
329
330 if (sy == 0)
331 fatalx("zero size");
332 oldy = screen_size_y(s);
333
334 /*
335 * When resizing:
336 *
337 * If the height is decreasing, delete lines from the bottom until
338 * hitting the cursor, then push lines from the top into the history.
339 *
340 * When increasing, pull as many lines as possible from scrolled
341 * history (not explicitly cleared from view) to the top, then fill the
342 * remaining with blanks at the bottom.
343 */
344
345 /* Size decreasing. */
346 if (sy < oldy) {
347 needed = oldy - sy;
348
349 /* Delete as many lines as possible from the bottom. */
350 if (eat_empty) {
351 available = oldy - 1 - s->cy;
352 if (available > 0) {
353 if (available > needed)
354 available = needed;
355 grid_view_delete_lines(gd, oldy - available,
356 available, 8);
357 }
358 needed -= available;
359 }
360
361 /*
362 * Now just increase the history size, if possible, to take
363 * over the lines which are left. If history is off, delete
364 * lines from the top.
365 */
366 available = s->cy;
367 if (gd->flags & GRID_HISTORY) {
368 gd->hscrolled += needed;
369 gd->hsize += needed;
370 } else if (needed > 0 && available > 0) {
371 if (available > needed)
372 available = needed;
373 grid_view_delete_lines(gd, 0, available, 8);
374 (*cy) -= available;
375 }
376 }
377
378 /* Resize line array. */
379 grid_adjust_lines(gd, gd->hsize + sy);
380
381 /* Size increasing. */
382 if (sy > oldy) {
383 needed = sy - oldy;
384
385 /*
386 * Try to pull as much as possible out of scrolled history, if
387 * it is enabled.
388 */
389 available = gd->hscrolled;
390 if (gd->flags & GRID_HISTORY && available > 0) {
391 if (available > needed)
392 available = needed;
393 gd->hscrolled -= available;
394 gd->hsize -= available;
395 } else
396 available = 0;
397 needed -= available;
398
399 /* Then fill the rest in with blanks. */
400 for (i = gd->hsize + sy - needed; i < gd->hsize + sy; i++)
401 grid_empty_line(gd, i, 8);
402 }
403
404 /* Set the new size, and reset the scroll region. */
405 gd->sy = sy;
406 s->rupper = 0;
407 s->rlower = screen_size_y(s) - 1;
408 }
409
410 /* Set selection. */
411 void
screen_set_selection(struct screen * s,u_int sx,u_int sy,u_int ex,u_int ey,u_int rectangle,int modekeys,struct grid_cell * gc)412 screen_set_selection(struct screen *s, u_int sx, u_int sy,
413 u_int ex, u_int ey, u_int rectangle, int modekeys, struct grid_cell *gc)
414 {
415 if (s->sel == NULL)
416 s->sel = xcalloc(1, sizeof *s->sel);
417
418 memcpy(&s->sel->cell, gc, sizeof s->sel->cell);
419 s->sel->hidden = 0;
420 s->sel->rectangle = rectangle;
421 s->sel->modekeys = modekeys;
422
423 s->sel->sx = sx;
424 s->sel->sy = sy;
425 s->sel->ex = ex;
426 s->sel->ey = ey;
427 }
428
429 /* Clear selection. */
430 void
screen_clear_selection(struct screen * s)431 screen_clear_selection(struct screen *s)
432 {
433 free(s->sel);
434 s->sel = NULL;
435 }
436
437 /* Hide selection. */
438 void
screen_hide_selection(struct screen * s)439 screen_hide_selection(struct screen *s)
440 {
441 if (s->sel != NULL)
442 s->sel->hidden = 1;
443 }
444
445 /* Check if cell in selection. */
446 int
screen_check_selection(struct screen * s,u_int px,u_int py)447 screen_check_selection(struct screen *s, u_int px, u_int py)
448 {
449 struct screen_sel *sel = s->sel;
450 u_int xx;
451
452 if (sel == NULL || sel->hidden)
453 return (0);
454
455 if (sel->rectangle) {
456 if (sel->sy < sel->ey) {
457 /* start line < end line -- downward selection. */
458 if (py < sel->sy || py > sel->ey)
459 return (0);
460 } else if (sel->sy > sel->ey) {
461 /* start line > end line -- upward selection. */
462 if (py > sel->sy || py < sel->ey)
463 return (0);
464 } else {
465 /* starting line == ending line. */
466 if (py != sel->sy)
467 return (0);
468 }
469
470 /*
471 * Need to include the selection start row, but not the cursor
472 * row, which means the selection changes depending on which
473 * one is on the left.
474 */
475 if (sel->ex < sel->sx) {
476 /* Cursor (ex) is on the left. */
477 if (px < sel->ex)
478 return (0);
479
480 if (px > sel->sx)
481 return (0);
482 } else {
483 /* Selection start (sx) is on the left. */
484 if (px < sel->sx)
485 return (0);
486
487 if (px > sel->ex)
488 return (0);
489 }
490 } else {
491 /*
492 * Like emacs, keep the top-left-most character, and drop the
493 * bottom-right-most, regardless of copy direction.
494 */
495 if (sel->sy < sel->ey) {
496 /* starting line < ending line -- downward selection. */
497 if (py < sel->sy || py > sel->ey)
498 return (0);
499
500 if (py == sel->sy && px < sel->sx)
501 return (0);
502
503 if (sel->modekeys == MODEKEY_EMACS)
504 xx = (sel->ex == 0 ? 0 : sel->ex - 1);
505 else
506 xx = sel->ex;
507 if (py == sel->ey && px > xx)
508 return (0);
509 } else if (sel->sy > sel->ey) {
510 /* starting line > ending line -- upward selection. */
511 if (py > sel->sy || py < sel->ey)
512 return (0);
513
514 if (py == sel->ey && px < sel->ex)
515 return (0);
516
517 if (sel->modekeys == MODEKEY_EMACS)
518 xx = sel->sx - 1;
519 else
520 xx = sel->sx;
521 if (py == sel->sy && (sel->sx == 0 || px > xx))
522 return (0);
523 } else {
524 /* starting line == ending line. */
525 if (py != sel->sy)
526 return (0);
527
528 if (sel->ex < sel->sx) {
529 /* cursor (ex) is on the left */
530 if (sel->modekeys == MODEKEY_EMACS)
531 xx = sel->sx - 1;
532 else
533 xx = sel->sx;
534 if (px > xx || px < sel->ex)
535 return (0);
536 } else {
537 /* selection start (sx) is on the left */
538 if (sel->modekeys == MODEKEY_EMACS)
539 xx = (sel->ex == 0 ? 0 : sel->ex - 1);
540 else
541 xx = sel->ex;
542 if (px < sel->sx || px > xx)
543 return (0);
544 }
545 }
546 }
547
548 return (1);
549 }
550
551 /* Get selected grid cell. */
552 void
screen_select_cell(struct screen * s,struct grid_cell * dst,const struct grid_cell * src)553 screen_select_cell(struct screen *s, struct grid_cell *dst,
554 const struct grid_cell *src)
555 {
556 if (s->sel == NULL || s->sel->hidden)
557 return;
558
559 memcpy(dst, &s->sel->cell, sizeof *dst);
560
561 utf8_copy(&dst->data, &src->data);
562 dst->attr = dst->attr & ~GRID_ATTR_CHARSET;
563 dst->attr |= src->attr & GRID_ATTR_CHARSET;
564 dst->flags = src->flags;
565 }
566
567 /* Reflow wrapped lines. */
568 static void
screen_reflow(struct screen * s,u_int new_x,u_int * cx,u_int * cy,int cursor)569 screen_reflow(struct screen *s, u_int new_x, u_int *cx, u_int *cy, int cursor)
570 {
571 u_int wx, wy;
572
573 if (cursor) {
574 grid_wrap_position(s->grid, *cx, *cy, &wx, &wy);
575 log_debug("%s: cursor %u,%u is %u,%u", __func__, *cx, *cy, wx,
576 wy);
577 }
578
579 grid_reflow(s->grid, new_x);
580
581 if (cursor) {
582 grid_unwrap_position(s->grid, cx, cy, wx, wy);
583 log_debug("%s: new cursor is %u,%u", __func__, *cx, *cy);
584 }
585 else {
586 *cx = 0;
587 *cy = s->grid->hsize;
588 }
589 }
590
591 /*
592 * Enter alternative screen mode. A copy of the visible screen is saved and the
593 * history is not updated.
594 */
595 void
screen_alternate_on(struct screen * s,struct grid_cell * gc,int cursor)596 screen_alternate_on(struct screen *s, struct grid_cell *gc, int cursor)
597 {
598 u_int sx, sy;
599
600 if (s->saved_grid != NULL)
601 return;
602 sx = screen_size_x(s);
603 sy = screen_size_y(s);
604
605 s->saved_grid = grid_create(sx, sy, 0);
606 grid_duplicate_lines(s->saved_grid, 0, s->grid, screen_hsize(s), sy);
607 if (cursor) {
608 s->saved_cx = s->cx;
609 s->saved_cy = s->cy;
610 }
611 memcpy(&s->saved_cell, gc, sizeof s->saved_cell);
612
613 grid_view_clear(s->grid, 0, 0, sx, sy, 8);
614
615 s->saved_flags = s->grid->flags;
616 s->grid->flags &= ~GRID_HISTORY;
617 }
618
619 /* Exit alternate screen mode and restore the copied grid. */
620 void
screen_alternate_off(struct screen * s,struct grid_cell * gc,int cursor)621 screen_alternate_off(struct screen *s, struct grid_cell *gc, int cursor)
622 {
623 u_int sx = screen_size_x(s), sy = screen_size_y(s);
624
625 /*
626 * If the current size is different, temporarily resize to the old size
627 * before copying back.
628 */
629 if (s->saved_grid != NULL)
630 screen_resize(s, s->saved_grid->sx, s->saved_grid->sy, 0);
631
632 /*
633 * Restore the cursor position and cell. This happens even if not
634 * currently in the alternate screen.
635 */
636 if (cursor && s->saved_cx != UINT_MAX && s->saved_cy != UINT_MAX) {
637 s->cx = s->saved_cx;
638 s->cy = s->saved_cy;
639 if (gc != NULL)
640 memcpy(gc, &s->saved_cell, sizeof *gc);
641 }
642
643 /* If not in the alternate screen, do nothing more. */
644 if (s->saved_grid == NULL) {
645 if (s->cx > screen_size_x(s) - 1)
646 s->cx = screen_size_x(s) - 1;
647 if (s->cy > screen_size_y(s) - 1)
648 s->cy = screen_size_y(s) - 1;
649 return;
650 }
651
652 /* Restore the saved grid. */
653 grid_duplicate_lines(s->grid, screen_hsize(s), s->saved_grid, 0,
654 s->saved_grid->sy);
655
656 /*
657 * Turn history back on (so resize can use it) and then resize back to
658 * the current size.
659 */
660 if (s->saved_flags & GRID_HISTORY)
661 s->grid->flags |= GRID_HISTORY;
662 screen_resize(s, sx, sy, 1);
663
664 grid_destroy(s->saved_grid);
665 s->saved_grid = NULL;
666
667 if (s->cx > screen_size_x(s) - 1)
668 s->cx = screen_size_x(s) - 1;
669 if (s->cy > screen_size_y(s) - 1)
670 s->cy = screen_size_y(s) - 1;
671 }
672
673 /* Get mode as a string. */
674 const char *
screen_mode_to_string(int mode)675 screen_mode_to_string(int mode)
676 {
677 static char tmp[1024];
678
679 if (mode == 0)
680 return ("NONE");
681 if (mode == ALL_MODES)
682 return ("ALL");
683
684 *tmp = '\0';
685 if (mode & MODE_CURSOR)
686 strlcat(tmp, "CURSOR,", sizeof tmp);
687 if (mode & MODE_INSERT)
688 strlcat(tmp, "INSERT,", sizeof tmp);
689 if (mode & MODE_KCURSOR)
690 strlcat(tmp, "KCURSOR,", sizeof tmp);
691 if (mode & MODE_KKEYPAD)
692 strlcat(tmp, "KKEYPAD,", sizeof tmp);
693 if (mode & MODE_WRAP)
694 strlcat(tmp, "WRAP,", sizeof tmp);
695 if (mode & MODE_MOUSE_STANDARD)
696 strlcat(tmp, "MOUSE_STANDARD,", sizeof tmp);
697 if (mode & MODE_MOUSE_BUTTON)
698 strlcat(tmp, "MOUSE_BUTTON,", sizeof tmp);
699 if (mode & MODE_CURSOR_BLINKING)
700 strlcat(tmp, "CURSOR_BLINKING,", sizeof tmp);
701 if (mode & MODE_CURSOR_VERY_VISIBLE)
702 strlcat(tmp, "CURSOR_VERY_VISIBLE,", sizeof tmp);
703 if (mode & MODE_MOUSE_UTF8)
704 strlcat(tmp, "MOUSE_UTF8,", sizeof tmp);
705 if (mode & MODE_MOUSE_SGR)
706 strlcat(tmp, "MOUSE_SGR,", sizeof tmp);
707 if (mode & MODE_BRACKETPASTE)
708 strlcat(tmp, "BRACKETPASTE,", sizeof tmp);
709 if (mode & MODE_FOCUSON)
710 strlcat(tmp, "FOCUSON,", sizeof tmp);
711 if (mode & MODE_MOUSE_ALL)
712 strlcat(tmp, "MOUSE_ALL,", sizeof tmp);
713 if (mode & MODE_ORIGIN)
714 strlcat(tmp, "ORIGIN,", sizeof tmp);
715 if (mode & MODE_CRLF)
716 strlcat(tmp, "CRLF,", sizeof tmp);
717 if (mode & MODE_KEXTENDED)
718 strlcat(tmp, "KEXTENDED,", sizeof tmp);
719 tmp[strlen(tmp) - 1] = '\0';
720 return (tmp);
721 }
722