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1 /*	$NetBSD: terminal.c,v 1.14 2012/05/30 18:21:14 christos Exp $	*/
2 
3 /*-
4  * Copyright (c) 1992, 1993
5  *	The Regents of the University of California.  All rights reserved.
6  *
7  * This code is derived from software contributed to Berkeley by
8  * Christos Zoulas of Cornell University.
9  *
10  * Redistribution and use in source and binary forms, with or without
11  * modification, are permitted provided that the following conditions
12  * are met:
13  * 1. Redistributions of source code must retain the above copyright
14  *    notice, this list of conditions and the following disclaimer.
15  * 2. Redistributions in binary form must reproduce the above copyright
16  *    notice, this list of conditions and the following disclaimer in the
17  *    documentation and/or other materials provided with the distribution.
18  * 3. Neither the name of the University nor the names of its contributors
19  *    may be used to endorse or promote products derived from this software
20  *    without specific prior written permission.
21  *
22  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32  * SUCH DAMAGE.
33  */
34 
35 #include "config.h"
36 #if !defined(lint) && !defined(SCCSID)
37 #if 0
38 static char sccsid[] = "@(#)term.c	8.2 (Berkeley) 4/30/95";
39 #else
40 __RCSID("$NetBSD: terminal.c,v 1.14 2012/05/30 18:21:14 christos Exp $");
41 #endif
42 #endif /* not lint && not SCCSID */
43 
44 /*
45  * terminal.c: Editor/termcap-curses interface
46  *	       We have to declare a static variable here, since the
47  *	       termcap putchar routine does not take an argument!
48  */
49 #include <stdio.h>
50 #include <signal.h>
51 #include <string.h>
52 #include <stdlib.h>
53 #include <unistd.h>
54 #include <limits.h>
55 #ifdef HAVE_TERMCAP_H
56 #include <termcap.h>
57 #endif
58 #ifdef HAVE_CURSES_H
59 #include <curses.h>
60 #elif HAVE_NCURSES_H
61 #include <ncurses.h>
62 #endif
63 
64 /* Solaris's term.h does horrid things. */
65 #if defined(HAVE_TERM_H) && !defined(__sun) && !defined(HAVE_TERMCAP_H)
66 #include <term.h>
67 #endif
68 
69 #include <sys/types.h>
70 #include <sys/ioctl.h>
71 
72 #ifdef _REENTRANT
73 #include <pthread.h>
74 #endif
75 
76 #include "el.h"
77 
78 /*
79  * IMPORTANT NOTE: these routines are allowed to look at the current screen
80  * and the current position assuming that it is correct.  If this is not
81  * true, then the update will be WRONG!  This is (should be) a valid
82  * assumption...
83  */
84 
85 #define	TC_BUFSIZE	((size_t)2048)
86 
87 #define	GoodStr(a)	(el->el_terminal.t_str[a] != NULL && \
88 			    el->el_terminal.t_str[a][0] != '\0')
89 #define	Str(a)		el->el_terminal.t_str[a]
90 #define	Val(a)		el->el_terminal.t_val[a]
91 
92 private const struct termcapstr {
93 	const char *name;
94 	const char *long_name;
95 } tstr[] = {
96 #define	T_al	0
97 	{ "al", "add new blank line" },
98 #define	T_bl	1
99 	{ "bl", "audible bell" },
100 #define	T_cd	2
101 	{ "cd", "clear to bottom" },
102 #define	T_ce	3
103 	{ "ce", "clear to end of line" },
104 #define	T_ch	4
105 	{ "ch", "cursor to horiz pos" },
106 #define	T_cl	5
107 	{ "cl", "clear screen" },
108 #define	T_dc	6
109 	{ "dc", "delete a character" },
110 #define	T_dl	7
111 	{ "dl", "delete a line" },
112 #define	T_dm	8
113 	{ "dm", "start delete mode" },
114 #define	T_ed	9
115 	{ "ed", "end delete mode" },
116 #define	T_ei	10
117 	{ "ei", "end insert mode" },
118 #define	T_fs	11
119 	{ "fs", "cursor from status line" },
120 #define	T_ho	12
121 	{ "ho", "home cursor" },
122 #define	T_ic	13
123 	{ "ic", "insert character" },
124 #define	T_im	14
125 	{ "im", "start insert mode" },
126 #define	T_ip	15
127 	{ "ip", "insert padding" },
128 #define	T_kd	16
129 	{ "kd", "sends cursor down" },
130 #define	T_kl	17
131 	{ "kl", "sends cursor left" },
132 #define	T_kr	18
133 	{ "kr", "sends cursor right" },
134 #define	T_ku	19
135 	{ "ku", "sends cursor up" },
136 #define	T_md	20
137 	{ "md", "begin bold" },
138 #define	T_me	21
139 	{ "me", "end attributes" },
140 #define	T_nd	22
141 	{ "nd", "non destructive space" },
142 #define	T_se	23
143 	{ "se", "end standout" },
144 #define	T_so	24
145 	{ "so", "begin standout" },
146 #define	T_ts	25
147 	{ "ts", "cursor to status line" },
148 #define	T_up	26
149 	{ "up", "cursor up one" },
150 #define	T_us	27
151 	{ "us", "begin underline" },
152 #define	T_ue	28
153 	{ "ue", "end underline" },
154 #define	T_vb	29
155 	{ "vb", "visible bell" },
156 #define	T_DC	30
157 	{ "DC", "delete multiple chars" },
158 #define	T_DO	31
159 	{ "DO", "cursor down multiple" },
160 #define	T_IC	32
161 	{ "IC", "insert multiple chars" },
162 #define	T_LE	33
163 	{ "LE", "cursor left multiple" },
164 #define	T_RI	34
165 	{ "RI", "cursor right multiple" },
166 #define	T_UP	35
167 	{ "UP", "cursor up multiple" },
168 #define	T_kh	36
169 	{ "kh", "send cursor home" },
170 #define	T_at7	37
171 	{ "@7", "send cursor end" },
172 #define	T_kD	38
173 	{ "kD", "send cursor delete" },
174 #define	T_str	39
175 	{ NULL, NULL }
176 };
177 
178 private const struct termcapval {
179 	const char *name;
180 	const char *long_name;
181 } tval[] = {
182 #define	T_am	0
183 	{ "am", "has automatic margins" },
184 #define	T_pt	1
185 	{ "pt", "has physical tabs" },
186 #define	T_li	2
187 	{ "li", "Number of lines" },
188 #define	T_co	3
189 	{ "co", "Number of columns" },
190 #define	T_km	4
191 	{ "km", "Has meta key" },
192 #define	T_xt	5
193 	{ "xt", "Tab chars destructive" },
194 #define	T_xn	6
195 	{ "xn", "newline ignored at right margin" },
196 #define	T_MT	7
197 	{ "MT", "Has meta key" },			/* XXX? */
198 #define	T_val	8
199 	{ NULL, NULL, }
200 };
201 /* do two or more of the attributes use me */
202 
203 private void	terminal_setflags(EditLine *);
204 private int	terminal_rebuffer_display(EditLine *);
205 private void	terminal_free_display(EditLine *);
206 private int	terminal_alloc_display(EditLine *);
207 private void	terminal_alloc(EditLine *, const struct termcapstr *,
208     const char *);
209 private void	terminal_init_arrow(EditLine *);
210 private void	terminal_reset_arrow(EditLine *);
211 private int	terminal_putc(int);
212 private void	terminal_tputs(EditLine *, const char *, int);
213 
214 #ifdef _REENTRANT
215 private pthread_mutex_t terminal_mutex = PTHREAD_MUTEX_INITIALIZER;
216 #endif
217 private FILE *terminal_outfile = NULL;
218 
219 
220 /* terminal_setflags():
221  *	Set the terminal capability flags
222  */
223 private void
terminal_setflags(EditLine * el)224 terminal_setflags(EditLine *el)
225 {
226 	EL_FLAGS = 0;
227 	if (el->el_tty.t_tabs)
228 		EL_FLAGS |= (Val(T_pt) && !Val(T_xt)) ? TERM_CAN_TAB : 0;
229 
230 	EL_FLAGS |= (Val(T_km) || Val(T_MT)) ? TERM_HAS_META : 0;
231 	EL_FLAGS |= GoodStr(T_ce) ? TERM_CAN_CEOL : 0;
232 	EL_FLAGS |= (GoodStr(T_dc) || GoodStr(T_DC)) ? TERM_CAN_DELETE : 0;
233 	EL_FLAGS |= (GoodStr(T_im) || GoodStr(T_ic) || GoodStr(T_IC)) ?
234 	    TERM_CAN_INSERT : 0;
235 	EL_FLAGS |= (GoodStr(T_up) || GoodStr(T_UP)) ? TERM_CAN_UP : 0;
236 	EL_FLAGS |= Val(T_am) ? TERM_HAS_AUTO_MARGINS : 0;
237 	EL_FLAGS |= Val(T_xn) ? TERM_HAS_MAGIC_MARGINS : 0;
238 
239 	if (GoodStr(T_me) && GoodStr(T_ue))
240 		EL_FLAGS |= (strcmp(Str(T_me), Str(T_ue)) == 0) ?
241 		    TERM_CAN_ME : 0;
242 	else
243 		EL_FLAGS &= ~TERM_CAN_ME;
244 	if (GoodStr(T_me) && GoodStr(T_se))
245 		EL_FLAGS |= (strcmp(Str(T_me), Str(T_se)) == 0) ?
246 		    TERM_CAN_ME : 0;
247 
248 
249 #ifdef DEBUG_SCREEN
250 	if (!EL_CAN_UP) {
251 		(void) fprintf(el->el_errfile,
252 		    "WARNING: Your terminal cannot move up.\n");
253 		(void) fprintf(el->el_errfile,
254 		    "Editing may be odd for long lines.\n");
255 	}
256 	if (!EL_CAN_CEOL)
257 		(void) fprintf(el->el_errfile, "no clear EOL capability.\n");
258 	if (!EL_CAN_DELETE)
259 		(void) fprintf(el->el_errfile, "no delete char capability.\n");
260 	if (!EL_CAN_INSERT)
261 		(void) fprintf(el->el_errfile, "no insert char capability.\n");
262 #endif /* DEBUG_SCREEN */
263 }
264 
265 /* terminal_init():
266  *	Initialize the terminal stuff
267  */
268 protected int
terminal_init(EditLine * el)269 terminal_init(EditLine *el)
270 {
271 
272 	el->el_terminal.t_buf = el_malloc(TC_BUFSIZE *
273 	    sizeof(*el->el_terminal.t_buf));
274 	if (el->el_terminal.t_buf == NULL)
275 		return -1;
276 	el->el_terminal.t_cap = el_malloc(TC_BUFSIZE *
277 	    sizeof(*el->el_terminal.t_cap));
278 	if (el->el_terminal.t_cap == NULL)
279 		return -1;
280 	el->el_terminal.t_fkey = el_malloc(A_K_NKEYS *
281 	    sizeof(*el->el_terminal.t_fkey));
282 	if (el->el_terminal.t_fkey == NULL)
283 		return -1;
284 	el->el_terminal.t_loc = 0;
285 	el->el_terminal.t_str = el_malloc(T_str *
286 	    sizeof(*el->el_terminal.t_str));
287 	if (el->el_terminal.t_str == NULL)
288 		return -1;
289 	(void) memset(el->el_terminal.t_str, 0, T_str *
290 	    sizeof(*el->el_terminal.t_str));
291 	el->el_terminal.t_val = el_malloc(T_val *
292 	    sizeof(*el->el_terminal.t_val));
293 	if (el->el_terminal.t_val == NULL)
294 		return -1;
295 	(void) memset(el->el_terminal.t_val, 0, T_val *
296 	    sizeof(*el->el_terminal.t_val));
297 	(void) terminal_set(el, NULL);
298 	terminal_init_arrow(el);
299 	return 0;
300 }
301 
302 /* terminal_end():
303  *	Clean up the terminal stuff
304  */
305 protected void
terminal_end(EditLine * el)306 terminal_end(EditLine *el)
307 {
308 
309 	el_free(el->el_terminal.t_buf);
310 	el->el_terminal.t_buf = NULL;
311 	el_free(el->el_terminal.t_cap);
312 	el->el_terminal.t_cap = NULL;
313 	el->el_terminal.t_loc = 0;
314 	el_free(el->el_terminal.t_str);
315 	el->el_terminal.t_str = NULL;
316 	el_free(el->el_terminal.t_val);
317 	el->el_terminal.t_val = NULL;
318 	el_free(el->el_terminal.t_fkey);
319 	el->el_terminal.t_fkey = NULL;
320 	terminal_free_display(el);
321 }
322 
323 
324 /* terminal_alloc():
325  *	Maintain a string pool for termcap strings
326  */
327 private void
terminal_alloc(EditLine * el,const struct termcapstr * t,const char * cap)328 terminal_alloc(EditLine *el, const struct termcapstr *t, const char *cap)
329 {
330 	char termbuf[TC_BUFSIZE];
331 	size_t tlen, clen;
332 	char **tlist = el->el_terminal.t_str;
333 	char **tmp, **str = &tlist[t - tstr];
334 
335 	(void) memset(termbuf, 0, sizeof(termbuf));
336 	if (cap == NULL || *cap == '\0') {
337 		*str = NULL;
338 		return;
339 	} else
340 		clen = strlen(cap);
341 
342 	tlen = *str == NULL ? 0 : strlen(*str);
343 
344 	/*
345          * New string is shorter; no need to allocate space
346          */
347 	if (clen <= tlen) {
348 		if (*str)
349 			(void) strcpy(*str, cap);	/* XXX strcpy is safe */
350 		return;
351 	}
352 	/*
353          * New string is longer; see if we have enough space to append
354          */
355 	if (el->el_terminal.t_loc + 3 < TC_BUFSIZE) {
356 						/* XXX strcpy is safe */
357 		(void) strcpy(*str = &el->el_terminal.t_buf[
358 		    el->el_terminal.t_loc], cap);
359 		el->el_terminal.t_loc += clen + 1;	/* one for \0 */
360 		return;
361 	}
362 	/*
363          * Compact our buffer; no need to check compaction, cause we know it
364          * fits...
365          */
366 	tlen = 0;
367 	for (tmp = tlist; tmp < &tlist[T_str]; tmp++)
368 		if (*tmp != NULL && *tmp != '\0' && *tmp != *str) {
369 			char *ptr;
370 
371 			for (ptr = *tmp; *ptr != '\0'; termbuf[tlen++] = *ptr++)
372 				continue;
373 			termbuf[tlen++] = '\0';
374 		}
375 	memcpy(el->el_terminal.t_buf, termbuf, TC_BUFSIZE);
376 	el->el_terminal.t_loc = tlen;
377 	if (el->el_terminal.t_loc + 3 >= TC_BUFSIZE) {
378 		(void) fprintf(el->el_errfile,
379 		    "Out of termcap string space.\n");
380 		return;
381 	}
382 					/* XXX strcpy is safe */
383 	(void) strcpy(*str = &el->el_terminal.t_buf[el->el_terminal.t_loc],
384 	    cap);
385 	el->el_terminal.t_loc += (size_t)clen + 1;	/* one for \0 */
386 	return;
387 }
388 
389 
390 /* terminal_rebuffer_display():
391  *	Rebuffer the display after the screen changed size
392  */
393 private int
terminal_rebuffer_display(EditLine * el)394 terminal_rebuffer_display(EditLine *el)
395 {
396 	coord_t *c = &el->el_terminal.t_size;
397 
398 	terminal_free_display(el);
399 
400 	c->h = Val(T_co);
401 	c->v = Val(T_li);
402 
403 	if (terminal_alloc_display(el) == -1)
404 		return -1;
405 	return 0;
406 }
407 
408 
409 /* terminal_alloc_display():
410  *	Allocate a new display.
411  */
412 private int
terminal_alloc_display(EditLine * el)413 terminal_alloc_display(EditLine *el)
414 {
415 	int i;
416 	Char **b;
417 	coord_t *c = &el->el_terminal.t_size;
418 
419 	b =  el_malloc(sizeof(*b) * (size_t)(c->v + 1));
420 	if (b == NULL)
421 		return -1;
422 	for (i = 0; i < c->v; i++) {
423 		b[i] = el_malloc(sizeof(**b) * (size_t)(c->h + 1));
424 		if (b[i] == NULL) {
425 			while (--i >= 0)
426 				el_free(b[i]);
427 			el_free(b);
428 			return -1;
429 		}
430 	}
431 	b[c->v] = NULL;
432 	el->el_display = b;
433 
434 	b = el_malloc(sizeof(*b) * (size_t)(c->v + 1));
435 	if (b == NULL)
436 		return -1;
437 	for (i = 0; i < c->v; i++) {
438 		b[i] = el_malloc(sizeof(**b) * (size_t)(c->h + 1));
439 		if (b[i] == NULL) {
440 			while (--i >= 0)
441 				el_free(b[i]);
442 			el_free(b);
443 			return -1;
444 		}
445 	}
446 	b[c->v] = NULL;
447 	el->el_vdisplay = b;
448 	return 0;
449 }
450 
451 
452 /* terminal_free_display():
453  *	Free the display buffers
454  */
455 private void
terminal_free_display(EditLine * el)456 terminal_free_display(EditLine *el)
457 {
458 	Char **b;
459 	Char **bufp;
460 
461 	b = el->el_display;
462 	el->el_display = NULL;
463 	if (b != NULL) {
464 		for (bufp = b; *bufp != NULL; bufp++)
465 			el_free(*bufp);
466 		el_free(b);
467 	}
468 	b = el->el_vdisplay;
469 	el->el_vdisplay = NULL;
470 	if (b != NULL) {
471 		for (bufp = b; *bufp != NULL; bufp++)
472 			el_free(*bufp);
473 		el_free(b);
474 	}
475 }
476 
477 
478 /* terminal_move_to_line():
479  *	move to line <where> (first line == 0)
480  * 	as efficiently as possible
481  */
482 protected void
terminal_move_to_line(EditLine * el,int where)483 terminal_move_to_line(EditLine *el, int where)
484 {
485 	int del;
486 
487 	if (where == el->el_cursor.v)
488 		return;
489 
490 	if (where > el->el_terminal.t_size.v) {
491 #ifdef DEBUG_SCREEN
492 		(void) fprintf(el->el_errfile,
493 		    "terminal_move_to_line: where is ridiculous: %d\r\n",
494 		    where);
495 #endif /* DEBUG_SCREEN */
496 		return;
497 	}
498 	if ((del = where - el->el_cursor.v) > 0) {
499 		while (del > 0) {
500 			if (EL_HAS_AUTO_MARGINS &&
501 			    el->el_display[el->el_cursor.v][0] != '\0') {
502                                 size_t h = (size_t)
503 				    (el->el_terminal.t_size.h - 1);
504 #ifdef WIDECHAR
505                                 for (; h > 0 &&
506                                          el->el_display[el->el_cursor.v][h] ==
507                                                  MB_FILL_CHAR;
508                                          h--)
509                                                 continue;
510 #endif
511 				/* move without newline */
512 				terminal_move_to_char(el, (int)h);
513 				terminal_overwrite(el, &el->el_display
514 				    [el->el_cursor.v][el->el_cursor.h],
515 				    (size_t)(el->el_terminal.t_size.h -
516 				    el->el_cursor.h));
517 				/* updates Cursor */
518 				del--;
519 			} else {
520 				if ((del > 1) && GoodStr(T_DO)) {
521 					terminal_tputs(el, tgoto(Str(T_DO), del,
522 					    del), del);
523 					del = 0;
524 				} else {
525 					for (; del > 0; del--)
526 						terminal__putc(el, '\n');
527 					/* because the \n will become \r\n */
528 					el->el_cursor.h = 0;
529 				}
530 			}
531 		}
532 	} else {		/* del < 0 */
533 		if (GoodStr(T_UP) && (-del > 1 || !GoodStr(T_up)))
534 			terminal_tputs(el, tgoto(Str(T_UP), -del, -del), -del);
535 		else {
536 			if (GoodStr(T_up))
537 				for (; del < 0; del++)
538 					terminal_tputs(el, Str(T_up), 1);
539 		}
540 	}
541 	el->el_cursor.v = where;/* now where is here */
542 }
543 
544 
545 /* terminal_move_to_char():
546  *	Move to the character position specified
547  */
548 protected void
terminal_move_to_char(EditLine * el,int where)549 terminal_move_to_char(EditLine *el, int where)
550 {
551 	int del, i;
552 
553 mc_again:
554 	if (where == el->el_cursor.h)
555 		return;
556 
557 	if (where > el->el_terminal.t_size.h) {
558 #ifdef DEBUG_SCREEN
559 		(void) fprintf(el->el_errfile,
560 		    "terminal_move_to_char: where is riduculous: %d\r\n",
561 		    where);
562 #endif /* DEBUG_SCREEN */
563 		return;
564 	}
565 	if (!where) {		/* if where is first column */
566 		terminal__putc(el, '\r');	/* do a CR */
567 		el->el_cursor.h = 0;
568 		return;
569 	}
570 	del = where - el->el_cursor.h;
571 
572 	if ((del < -4 || del > 4) && GoodStr(T_ch))
573 		/* go there directly */
574 		terminal_tputs(el, tgoto(Str(T_ch), where, where), where);
575 	else {
576 		if (del > 0) {	/* moving forward */
577 			if ((del > 4) && GoodStr(T_RI))
578 				terminal_tputs(el, tgoto(Str(T_RI), del, del),
579 				    del);
580 			else {
581 					/* if I can do tabs, use them */
582 				if (EL_CAN_TAB) {
583 					if ((el->el_cursor.h & 0370) !=
584 					    (where & ~0x7)
585 #ifdef WIDECHAR
586 					    && (el->el_display[
587 					    el->el_cursor.v][where & 0370] !=
588 					    MB_FILL_CHAR)
589 #endif
590 					    ) {
591 						/* if not within tab stop */
592 						for (i =
593 						    (el->el_cursor.h & 0370);
594 						    i < (where & ~0x7);
595 						    i += 8)
596 							terminal__putc(el,
597 							    '\t');
598 							/* then tab over */
599 						el->el_cursor.h = where & ~0x7;
600 					}
601 				}
602 				/*
603 				 * it's usually cheaper to just write the
604 				 * chars, so we do.
605 				 */
606 				/*
607 				 * NOTE THAT terminal_overwrite() WILL CHANGE
608 				 * el->el_cursor.h!!!
609 				 */
610 				terminal_overwrite(el, &el->el_display[
611 				    el->el_cursor.v][el->el_cursor.h],
612 				    (size_t)(where - el->el_cursor.h));
613 
614 			}
615 		} else {	/* del < 0 := moving backward */
616 			if ((-del > 4) && GoodStr(T_LE))
617 				terminal_tputs(el, tgoto(Str(T_LE), -del, -del),
618 				    -del);
619 			else {	/* can't go directly there */
620 				/*
621 				 * if the "cost" is greater than the "cost"
622 				 * from col 0
623 				 */
624 				if (EL_CAN_TAB ?
625 				    ((unsigned int)-del >
626 				    (((unsigned int) where >> 3) +
627 				     (where & 07)))
628 				    : (-del > where)) {
629 					terminal__putc(el, '\r');/* do a CR */
630 					el->el_cursor.h = 0;
631 					goto mc_again;	/* and try again */
632 				}
633 				for (i = 0; i < -del; i++)
634 					terminal__putc(el, '\b');
635 			}
636 		}
637 	}
638 	el->el_cursor.h = where;		/* now where is here */
639 }
640 
641 
642 /* terminal_overwrite():
643  *	Overstrike num characters
644  *	Assumes MB_FILL_CHARs are present to keep the column count correct
645  */
646 protected void
terminal_overwrite(EditLine * el,const Char * cp,size_t n)647 terminal_overwrite(EditLine *el, const Char *cp, size_t n)
648 {
649 	if (n == 0)
650 		return;
651 
652 	if (n > (size_t)el->el_terminal.t_size.h) {
653 #ifdef DEBUG_SCREEN
654 		(void) fprintf(el->el_errfile,
655 		    "terminal_overwrite: n is riduculous: %d\r\n", n);
656 #endif /* DEBUG_SCREEN */
657 		return;
658 	}
659 
660         do {
661                 /* terminal__putc() ignores any MB_FILL_CHARs */
662                 terminal__putc(el, *cp++);
663                 el->el_cursor.h++;
664         } while (--n);
665 
666 	if (el->el_cursor.h >= el->el_terminal.t_size.h) {	/* wrap? */
667 		if (EL_HAS_AUTO_MARGINS) {	/* yes */
668 			el->el_cursor.h = 0;
669 			el->el_cursor.v++;
670 			if (EL_HAS_MAGIC_MARGINS) {
671 				/* force the wrap to avoid the "magic"
672 				 * situation */
673 				Char c;
674 				if ((c = el->el_display[el->el_cursor.v]
675 				    [el->el_cursor.h]) != '\0') {
676 					terminal_overwrite(el, &c, (size_t)1);
677 #ifdef WIDECHAR
678 					while (el->el_display[el->el_cursor.v]
679 					    [el->el_cursor.h] == MB_FILL_CHAR)
680 						el->el_cursor.h++;
681 #endif
682 				} else {
683 					terminal__putc(el, ' ');
684 					el->el_cursor.h = 1;
685 				}
686 			}
687 		} else		/* no wrap, but cursor stays on screen */
688 			el->el_cursor.h = el->el_terminal.t_size.h - 1;
689 	}
690 }
691 
692 
693 /* terminal_deletechars():
694  *	Delete num characters
695  */
696 protected void
terminal_deletechars(EditLine * el,int num)697 terminal_deletechars(EditLine *el, int num)
698 {
699 	if (num <= 0)
700 		return;
701 
702 	if (!EL_CAN_DELETE) {
703 #ifdef DEBUG_EDIT
704 		(void) fprintf(el->el_errfile, "   ERROR: cannot delete   \n");
705 #endif /* DEBUG_EDIT */
706 		return;
707 	}
708 	if (num > el->el_terminal.t_size.h) {
709 #ifdef DEBUG_SCREEN
710 		(void) fprintf(el->el_errfile,
711 		    "terminal_deletechars: num is riduculous: %d\r\n", num);
712 #endif /* DEBUG_SCREEN */
713 		return;
714 	}
715 	if (GoodStr(T_DC))	/* if I have multiple delete */
716 		if ((num > 1) || !GoodStr(T_dc)) {	/* if dc would be more
717 							 * expen. */
718 			terminal_tputs(el, tgoto(Str(T_DC), num, num), num);
719 			return;
720 		}
721 	if (GoodStr(T_dm))	/* if I have delete mode */
722 		terminal_tputs(el, Str(T_dm), 1);
723 
724 	if (GoodStr(T_dc))	/* else do one at a time */
725 		while (num--)
726 			terminal_tputs(el, Str(T_dc), 1);
727 
728 	if (GoodStr(T_ed))	/* if I have delete mode */
729 		terminal_tputs(el, Str(T_ed), 1);
730 }
731 
732 
733 /* terminal_insertwrite():
734  *	Puts terminal in insert character mode or inserts num
735  *	characters in the line
736  *      Assumes MB_FILL_CHARs are present to keep column count correct
737  */
738 protected void
terminal_insertwrite(EditLine * el,Char * cp,int num)739 terminal_insertwrite(EditLine *el, Char *cp, int num)
740 {
741 	if (num <= 0)
742 		return;
743 	if (!EL_CAN_INSERT) {
744 #ifdef DEBUG_EDIT
745 		(void) fprintf(el->el_errfile, "   ERROR: cannot insert   \n");
746 #endif /* DEBUG_EDIT */
747 		return;
748 	}
749 	if (num > el->el_terminal.t_size.h) {
750 #ifdef DEBUG_SCREEN
751 		(void) fprintf(el->el_errfile,
752 		    "StartInsert: num is riduculous: %d\r\n", num);
753 #endif /* DEBUG_SCREEN */
754 		return;
755 	}
756 	if (GoodStr(T_IC))	/* if I have multiple insert */
757 		if ((num > 1) || !GoodStr(T_ic)) {
758 				/* if ic would be more expensive */
759 			terminal_tputs(el, tgoto(Str(T_IC), num, num), num);
760 			terminal_overwrite(el, cp, (size_t)num);
761 				/* this updates el_cursor.h */
762 			return;
763 		}
764 	if (GoodStr(T_im) && GoodStr(T_ei)) {	/* if I have insert mode */
765 		terminal_tputs(el, Str(T_im), 1);
766 
767 		el->el_cursor.h += num;
768 		do
769 			terminal__putc(el, *cp++);
770 		while (--num);
771 
772 		if (GoodStr(T_ip))	/* have to make num chars insert */
773 			terminal_tputs(el, Str(T_ip), 1);
774 
775 		terminal_tputs(el, Str(T_ei), 1);
776 		return;
777 	}
778 	do {
779 		if (GoodStr(T_ic))	/* have to make num chars insert */
780 			terminal_tputs(el, Str(T_ic), 1);
781 
782 		terminal__putc(el, *cp++);
783 
784 		el->el_cursor.h++;
785 
786 		if (GoodStr(T_ip))	/* have to make num chars insert */
787 			terminal_tputs(el, Str(T_ip), 1);
788 					/* pad the inserted char */
789 
790 	} while (--num);
791 }
792 
793 
794 /* terminal_clear_EOL():
795  *	clear to end of line.  There are num characters to clear
796  */
797 protected void
terminal_clear_EOL(EditLine * el,int num)798 terminal_clear_EOL(EditLine *el, int num)
799 {
800 	int i;
801 
802 	if (EL_CAN_CEOL && GoodStr(T_ce))
803 		terminal_tputs(el, Str(T_ce), 1);
804 	else {
805 		for (i = 0; i < num; i++)
806 			terminal__putc(el, ' ');
807 		el->el_cursor.h += num;	/* have written num spaces */
808 	}
809 }
810 
811 
812 /* terminal_clear_screen():
813  *	Clear the screen
814  */
815 protected void
terminal_clear_screen(EditLine * el)816 terminal_clear_screen(EditLine *el)
817 {				/* clear the whole screen and home */
818 
819 	if (GoodStr(T_cl))
820 		/* send the clear screen code */
821 		terminal_tputs(el, Str(T_cl), Val(T_li));
822 	else if (GoodStr(T_ho) && GoodStr(T_cd)) {
823 		terminal_tputs(el, Str(T_ho), Val(T_li));	/* home */
824 		/* clear to bottom of screen */
825 		terminal_tputs(el, Str(T_cd), Val(T_li));
826 	} else {
827 		terminal__putc(el, '\r');
828 		terminal__putc(el, '\n');
829 	}
830 }
831 
832 
833 /* terminal_beep():
834  *	Beep the way the terminal wants us
835  */
836 protected void
terminal_beep(EditLine * el)837 terminal_beep(EditLine *el)
838 {
839 	if (GoodStr(T_bl))
840 		/* what termcap says we should use */
841 		terminal_tputs(el, Str(T_bl), 1);
842 	else
843 		terminal__putc(el, '\007');	/* an ASCII bell; ^G */
844 }
845 
846 
847 protected void
terminal_get(EditLine * el,const char ** term)848 terminal_get(EditLine *el, const char **term)
849 {
850 	*term = el->el_terminal.t_name;
851 }
852 
853 
854 /* terminal_set():
855  *	Read in the terminal capabilities from the requested terminal
856  */
857 protected int
terminal_set(EditLine * el,const char * term)858 terminal_set(EditLine *el, const char *term)
859 {
860 	int i;
861 	char buf[TC_BUFSIZE];
862 	char *area;
863 	const struct termcapstr *t;
864 	sigset_t oset, nset;
865 	int lins, cols;
866 
867 	(void) sigemptyset(&nset);
868 	(void) sigaddset(&nset, SIGWINCH);
869 	(void) sigprocmask(SIG_BLOCK, &nset, &oset);
870 
871 	area = buf;
872 
873 
874 	if (term == NULL)
875 		term = getenv("TERM");
876 
877 	if (!term || !term[0])
878 		term = "dumb";
879 
880 	if (strcmp(term, "emacs") == 0)
881 		el->el_flags |= EDIT_DISABLED;
882 
883 	(void) memset(el->el_terminal.t_cap, 0, TC_BUFSIZE);
884 
885 	i = tgetent(el->el_terminal.t_cap, term);
886 
887 	if (i <= 0) {
888 		if (i == -1)
889 			(void) fprintf(el->el_errfile,
890 			    "Cannot read termcap database;\n");
891 		else if (i == 0)
892 			(void) fprintf(el->el_errfile,
893 			    "No entry for terminal type \"%s\";\n", term);
894 		(void) fprintf(el->el_errfile,
895 		    "using dumb terminal settings.\n");
896 		Val(T_co) = 80;	/* do a dumb terminal */
897 		Val(T_pt) = Val(T_km) = Val(T_li) = 0;
898 		Val(T_xt) = Val(T_MT);
899 		for (t = tstr; t->name != NULL; t++)
900 			terminal_alloc(el, t, NULL);
901 	} else {
902 		/* auto/magic margins */
903 		Val(T_am) = tgetflag("am");
904 		Val(T_xn) = tgetflag("xn");
905 		/* Can we tab */
906 		Val(T_pt) = tgetflag("pt");
907 		Val(T_xt) = tgetflag("xt");
908 		/* do we have a meta? */
909 		Val(T_km) = tgetflag("km");
910 		Val(T_MT) = tgetflag("MT");
911 		/* Get the size */
912 		Val(T_co) = tgetnum("co");
913 		Val(T_li) = tgetnum("li");
914 		for (t = tstr; t->name != NULL; t++) {
915 			/* XXX: some systems' tgetstr needs non const */
916 			terminal_alloc(el, t, tgetstr(strchr(t->name, *t->name),
917 			    &area));
918 		}
919 	}
920 
921 	if (Val(T_co) < 2)
922 		Val(T_co) = 80;	/* just in case */
923 	if (Val(T_li) < 1)
924 		Val(T_li) = 24;
925 
926 	el->el_terminal.t_size.v = Val(T_co);
927 	el->el_terminal.t_size.h = Val(T_li);
928 
929 	terminal_setflags(el);
930 
931 				/* get the correct window size */
932 	(void) terminal_get_size(el, &lins, &cols);
933 	if (terminal_change_size(el, lins, cols) == -1)
934 		return -1;
935 	(void) sigprocmask(SIG_SETMASK, &oset, NULL);
936 	terminal_bind_arrow(el);
937 	el->el_terminal.t_name = term;
938 	return i <= 0 ? -1 : 0;
939 }
940 
941 
942 /* terminal_get_size():
943  *	Return the new window size in lines and cols, and
944  *	true if the size was changed.
945  */
946 protected int
terminal_get_size(EditLine * el,int * lins,int * cols)947 terminal_get_size(EditLine *el, int *lins, int *cols)
948 {
949 
950 	*cols = Val(T_co);
951 	*lins = Val(T_li);
952 
953 #ifdef TIOCGWINSZ
954 	{
955 		struct winsize ws;
956 		if (ioctl(el->el_infd, TIOCGWINSZ, &ws) != -1) {
957 			if (ws.ws_col)
958 				*cols = ws.ws_col;
959 			if (ws.ws_row)
960 				*lins = ws.ws_row;
961 		}
962 	}
963 #endif
964 #ifdef TIOCGSIZE
965 	{
966 		struct ttysize ts;
967 		if (ioctl(el->el_infd, TIOCGSIZE, &ts) != -1) {
968 			if (ts.ts_cols)
969 				*cols = ts.ts_cols;
970 			if (ts.ts_lines)
971 				*lins = ts.ts_lines;
972 		}
973 	}
974 #endif
975 	return Val(T_co) != *cols || Val(T_li) != *lins;
976 }
977 
978 
979 /* terminal_change_size():
980  *	Change the size of the terminal
981  */
982 protected int
terminal_change_size(EditLine * el,int lins,int cols)983 terminal_change_size(EditLine *el, int lins, int cols)
984 {
985 	/*
986          * Just in case
987          */
988 	Val(T_co) = (cols < 2) ? 80 : cols;
989 	Val(T_li) = (lins < 1) ? 24 : lins;
990 
991 	/* re-make display buffers */
992 	if (terminal_rebuffer_display(el) == -1)
993 		return -1;
994 	re_clear_display(el);
995 	return 0;
996 }
997 
998 
999 /* terminal_init_arrow():
1000  *	Initialize the arrow key bindings from termcap
1001  */
1002 private void
terminal_init_arrow(EditLine * el)1003 terminal_init_arrow(EditLine *el)
1004 {
1005 	funckey_t *arrow = el->el_terminal.t_fkey;
1006 
1007 	arrow[A_K_DN].name = STR("down");
1008 	arrow[A_K_DN].key = T_kd;
1009 	arrow[A_K_DN].fun.cmd = ED_NEXT_HISTORY;
1010 	arrow[A_K_DN].type = XK_CMD;
1011 
1012 	arrow[A_K_UP].name = STR("up");
1013 	arrow[A_K_UP].key = T_ku;
1014 	arrow[A_K_UP].fun.cmd = ED_PREV_HISTORY;
1015 	arrow[A_K_UP].type = XK_CMD;
1016 
1017 	arrow[A_K_LT].name = STR("left");
1018 	arrow[A_K_LT].key = T_kl;
1019 	arrow[A_K_LT].fun.cmd = ED_PREV_CHAR;
1020 	arrow[A_K_LT].type = XK_CMD;
1021 
1022 	arrow[A_K_RT].name = STR("right");
1023 	arrow[A_K_RT].key = T_kr;
1024 	arrow[A_K_RT].fun.cmd = ED_NEXT_CHAR;
1025 	arrow[A_K_RT].type = XK_CMD;
1026 
1027 	arrow[A_K_HO].name = STR("home");
1028 	arrow[A_K_HO].key = T_kh;
1029 	arrow[A_K_HO].fun.cmd = ED_MOVE_TO_BEG;
1030 	arrow[A_K_HO].type = XK_CMD;
1031 
1032 	arrow[A_K_EN].name = STR("end");
1033 	arrow[A_K_EN].key = T_at7;
1034 	arrow[A_K_EN].fun.cmd = ED_MOVE_TO_END;
1035 	arrow[A_K_EN].type = XK_CMD;
1036 
1037 	arrow[A_K_DE].name = STR("delete");
1038 	arrow[A_K_DE].key = T_kD;
1039 	arrow[A_K_DE].fun.cmd = ED_DELETE_NEXT_CHAR;
1040 	arrow[A_K_DE].type = XK_CMD;
1041 }
1042 
1043 
1044 /* terminal_reset_arrow():
1045  *	Reset arrow key bindings
1046  */
1047 private void
terminal_reset_arrow(EditLine * el)1048 terminal_reset_arrow(EditLine *el)
1049 {
1050 	funckey_t *arrow = el->el_terminal.t_fkey;
1051 	static const Char strA[] = {033, '[', 'A', '\0'};
1052 	static const Char strB[] = {033, '[', 'B', '\0'};
1053 	static const Char strC[] = {033, '[', 'C', '\0'};
1054 	static const Char strD[] = {033, '[', 'D', '\0'};
1055 	static const Char strH[] = {033, '[', 'H', '\0'};
1056 	static const Char strF[] = {033, '[', 'F', '\0'};
1057 	static const Char stOA[] = {033, 'O', 'A', '\0'};
1058 	static const Char stOB[] = {033, 'O', 'B', '\0'};
1059 	static const Char stOC[] = {033, 'O', 'C', '\0'};
1060 	static const Char stOD[] = {033, 'O', 'D', '\0'};
1061 	static const Char stOH[] = {033, 'O', 'H', '\0'};
1062 	static const Char stOF[] = {033, 'O', 'F', '\0'};
1063 
1064 	keymacro_add(el, strA, &arrow[A_K_UP].fun, arrow[A_K_UP].type);
1065 	keymacro_add(el, strB, &arrow[A_K_DN].fun, arrow[A_K_DN].type);
1066 	keymacro_add(el, strC, &arrow[A_K_RT].fun, arrow[A_K_RT].type);
1067 	keymacro_add(el, strD, &arrow[A_K_LT].fun, arrow[A_K_LT].type);
1068 	keymacro_add(el, strH, &arrow[A_K_HO].fun, arrow[A_K_HO].type);
1069 	keymacro_add(el, strF, &arrow[A_K_EN].fun, arrow[A_K_EN].type);
1070 	keymacro_add(el, stOA, &arrow[A_K_UP].fun, arrow[A_K_UP].type);
1071 	keymacro_add(el, stOB, &arrow[A_K_DN].fun, arrow[A_K_DN].type);
1072 	keymacro_add(el, stOC, &arrow[A_K_RT].fun, arrow[A_K_RT].type);
1073 	keymacro_add(el, stOD, &arrow[A_K_LT].fun, arrow[A_K_LT].type);
1074 	keymacro_add(el, stOH, &arrow[A_K_HO].fun, arrow[A_K_HO].type);
1075 	keymacro_add(el, stOF, &arrow[A_K_EN].fun, arrow[A_K_EN].type);
1076 
1077 	if (el->el_map.type != MAP_VI)
1078 		return;
1079 	keymacro_add(el, &strA[1], &arrow[A_K_UP].fun, arrow[A_K_UP].type);
1080 	keymacro_add(el, &strB[1], &arrow[A_K_DN].fun, arrow[A_K_DN].type);
1081 	keymacro_add(el, &strC[1], &arrow[A_K_RT].fun, arrow[A_K_RT].type);
1082 	keymacro_add(el, &strD[1], &arrow[A_K_LT].fun, arrow[A_K_LT].type);
1083 	keymacro_add(el, &strH[1], &arrow[A_K_HO].fun, arrow[A_K_HO].type);
1084 	keymacro_add(el, &strF[1], &arrow[A_K_EN].fun, arrow[A_K_EN].type);
1085 	keymacro_add(el, &stOA[1], &arrow[A_K_UP].fun, arrow[A_K_UP].type);
1086 	keymacro_add(el, &stOB[1], &arrow[A_K_DN].fun, arrow[A_K_DN].type);
1087 	keymacro_add(el, &stOC[1], &arrow[A_K_RT].fun, arrow[A_K_RT].type);
1088 	keymacro_add(el, &stOD[1], &arrow[A_K_LT].fun, arrow[A_K_LT].type);
1089 	keymacro_add(el, &stOH[1], &arrow[A_K_HO].fun, arrow[A_K_HO].type);
1090 	keymacro_add(el, &stOF[1], &arrow[A_K_EN].fun, arrow[A_K_EN].type);
1091 }
1092 
1093 
1094 /* terminal_set_arrow():
1095  *	Set an arrow key binding
1096  */
1097 protected int
terminal_set_arrow(EditLine * el,const Char * name,keymacro_value_t * fun,int type)1098 terminal_set_arrow(EditLine *el, const Char *name, keymacro_value_t *fun,
1099     int type)
1100 {
1101 	funckey_t *arrow = el->el_terminal.t_fkey;
1102 	int i;
1103 
1104 	for (i = 0; i < A_K_NKEYS; i++)
1105 		if (Strcmp(name, arrow[i].name) == 0) {
1106 			arrow[i].fun = *fun;
1107 			arrow[i].type = type;
1108 			return 0;
1109 		}
1110 	return -1;
1111 }
1112 
1113 
1114 /* terminal_clear_arrow():
1115  *	Clear an arrow key binding
1116  */
1117 protected int
terminal_clear_arrow(EditLine * el,const Char * name)1118 terminal_clear_arrow(EditLine *el, const Char *name)
1119 {
1120 	funckey_t *arrow = el->el_terminal.t_fkey;
1121 	int i;
1122 
1123 	for (i = 0; i < A_K_NKEYS; i++)
1124 		if (Strcmp(name, arrow[i].name) == 0) {
1125 			arrow[i].type = XK_NOD;
1126 			return 0;
1127 		}
1128 	return -1;
1129 }
1130 
1131 
1132 /* terminal_print_arrow():
1133  *	Print the arrow key bindings
1134  */
1135 protected void
terminal_print_arrow(EditLine * el,const Char * name)1136 terminal_print_arrow(EditLine *el, const Char *name)
1137 {
1138 	int i;
1139 	funckey_t *arrow = el->el_terminal.t_fkey;
1140 
1141 	for (i = 0; i < A_K_NKEYS; i++)
1142 		if (*name == '\0' || Strcmp(name, arrow[i].name) == 0)
1143 			if (arrow[i].type != XK_NOD)
1144 				keymacro_kprint(el, arrow[i].name,
1145 				    &arrow[i].fun, arrow[i].type);
1146 }
1147 
1148 
1149 /* terminal_bind_arrow():
1150  *	Bind the arrow keys
1151  */
1152 protected void
terminal_bind_arrow(EditLine * el)1153 terminal_bind_arrow(EditLine *el)
1154 {
1155 	el_action_t *map;
1156 	const el_action_t *dmap;
1157 	int i, j;
1158 	char *p;
1159 	funckey_t *arrow = el->el_terminal.t_fkey;
1160 
1161 	/* Check if the components needed are initialized */
1162 	if (el->el_terminal.t_buf == NULL || el->el_map.key == NULL)
1163 		return;
1164 
1165 	map = el->el_map.type == MAP_VI ? el->el_map.alt : el->el_map.key;
1166 	dmap = el->el_map.type == MAP_VI ? el->el_map.vic : el->el_map.emacs;
1167 
1168 	terminal_reset_arrow(el);
1169 
1170 	for (i = 0; i < A_K_NKEYS; i++) {
1171 		Char wt_str[VISUAL_WIDTH_MAX];
1172 		Char *px;
1173 		size_t n;
1174 
1175 		p = el->el_terminal.t_str[arrow[i].key];
1176 		if (!p || !*p)
1177 			continue;
1178 		for (n = 0; n < VISUAL_WIDTH_MAX && p[n]; ++n)
1179 			wt_str[n] = p[n];
1180 		while (n < VISUAL_WIDTH_MAX)
1181 			wt_str[n++] = '\0';
1182 		px = wt_str;
1183 		j = (unsigned char) *p;
1184 		/*
1185 		 * Assign the arrow keys only if:
1186 		 *
1187 		 * 1. They are multi-character arrow keys and the user
1188 		 *    has not re-assigned the leading character, or
1189 		 *    has re-assigned the leading character to be
1190 		 *	  ED_SEQUENCE_LEAD_IN
1191 		 * 2. They are single arrow keys pointing to an
1192 		 *    unassigned key.
1193 		 */
1194 		if (arrow[i].type == XK_NOD)
1195 			keymacro_clear(el, map, px);
1196 		else {
1197 			if (p[1] && (dmap[j] == map[j] ||
1198 				map[j] == ED_SEQUENCE_LEAD_IN)) {
1199 				keymacro_add(el, px, &arrow[i].fun,
1200 				    arrow[i].type);
1201 				map[j] = ED_SEQUENCE_LEAD_IN;
1202 			} else if (map[j] == ED_UNASSIGNED) {
1203 				keymacro_clear(el, map, px);
1204 				if (arrow[i].type == XK_CMD)
1205 					map[j] = arrow[i].fun.cmd;
1206 				else
1207 					keymacro_add(el, px, &arrow[i].fun,
1208 					    arrow[i].type);
1209 			}
1210 		}
1211 	}
1212 }
1213 
1214 /* terminal_putc():
1215  *	Add a character
1216  */
1217 private int
terminal_putc(int c)1218 terminal_putc(int c)
1219 {
1220 	if (terminal_outfile == NULL)
1221 		return -1;
1222 	return fputc(c, terminal_outfile);
1223 }
1224 
1225 private void
terminal_tputs(EditLine * el,const char * cap,int affcnt)1226 terminal_tputs(EditLine *el, const char *cap, int affcnt)
1227 {
1228 #ifdef _REENTRANT
1229 	pthread_mutex_lock(&terminal_mutex);
1230 #endif
1231 	terminal_outfile = el->el_outfile;
1232 	(void)tputs(cap, affcnt, terminal_putc);
1233 #ifdef _REENTRANT
1234 	pthread_mutex_unlock(&terminal_mutex);
1235 #endif
1236 }
1237 
1238 /* terminal__putc():
1239  *	Add a character
1240  */
1241 protected int
terminal__putc(EditLine * el,Int c)1242 terminal__putc(EditLine *el, Int c)
1243 {
1244 	char buf[MB_LEN_MAX +1];
1245 	ssize_t i;
1246 	if (c == (Int)MB_FILL_CHAR)
1247 		return 0;
1248 	i = ct_encode_char(buf, (size_t)MB_LEN_MAX, c);
1249 	if (i <= 0)
1250 		return (int)i;
1251 	buf[i] = '\0';
1252 	return fputs(buf, el->el_outfile);
1253 }
1254 
1255 /* terminal__flush():
1256  *	Flush output
1257  */
1258 protected void
terminal__flush(EditLine * el)1259 terminal__flush(EditLine *el)
1260 {
1261 
1262 	(void) fflush(el->el_outfile);
1263 }
1264 
1265 /* terminal_writec():
1266  *	Write the given character out, in a human readable form
1267  */
1268 protected void
terminal_writec(EditLine * el,Int c)1269 terminal_writec(EditLine *el, Int c)
1270 {
1271 	Char visbuf[VISUAL_WIDTH_MAX +1];
1272 	ssize_t vcnt = ct_visual_char(visbuf, VISUAL_WIDTH_MAX, c);
1273 	if (vcnt < 0)
1274 		vcnt = 0;
1275 	visbuf[vcnt] = '\0';
1276 	terminal_overwrite(el, visbuf, (size_t)vcnt);
1277 	terminal__flush(el);
1278 }
1279 
1280 
1281 /* terminal_telltc():
1282  *	Print the current termcap characteristics
1283  */
1284 protected int
1285 /*ARGSUSED*/
terminal_telltc(EditLine * el,int argc,const Char ** argv)1286 terminal_telltc(EditLine *el, int argc __attribute__((__unused__)),
1287     const Char **argv __attribute__((__unused__)))
1288 {
1289 	const struct termcapstr *t;
1290 	char **ts;
1291 
1292 	(void) fprintf(el->el_outfile, "\n\tYour terminal has the\n");
1293 	(void) fprintf(el->el_outfile, "\tfollowing characteristics:\n\n");
1294 	(void) fprintf(el->el_outfile, "\tIt has %d columns and %d lines\n",
1295 	    Val(T_co), Val(T_li));
1296 	(void) fprintf(el->el_outfile,
1297 	    "\tIt has %s meta key\n", EL_HAS_META ? "a" : "no");
1298 	(void) fprintf(el->el_outfile,
1299 	    "\tIt can%suse tabs\n", EL_CAN_TAB ? " " : "not ");
1300 	(void) fprintf(el->el_outfile, "\tIt %s automatic margins\n",
1301 	    EL_HAS_AUTO_MARGINS ? "has" : "does not have");
1302 	if (EL_HAS_AUTO_MARGINS)
1303 		(void) fprintf(el->el_outfile, "\tIt %s magic margins\n",
1304 		    EL_HAS_MAGIC_MARGINS ? "has" : "does not have");
1305 
1306 	for (t = tstr, ts = el->el_terminal.t_str; t->name != NULL; t++, ts++) {
1307 		const char *ub;
1308 		if (*ts && **ts) {
1309 			ub = ct_encode_string(ct_visual_string(
1310 			    ct_decode_string(*ts, &el->el_scratch)),
1311 			    &el->el_scratch);
1312 		} else {
1313 			ub = "(empty)";
1314 		}
1315 		(void) fprintf(el->el_outfile, "\t%25s (%s) == %s\n",
1316 		    t->long_name, t->name, ub);
1317 	}
1318 	(void) fputc('\n', el->el_outfile);
1319 	return 0;
1320 }
1321 
1322 
1323 /* terminal_settc():
1324  *	Change the current terminal characteristics
1325  */
1326 protected int
1327 /*ARGSUSED*/
terminal_settc(EditLine * el,int argc,const Char ** argv)1328 terminal_settc(EditLine *el, int argc __attribute__((__unused__)),
1329     const Char **argv)
1330 {
1331 	const struct termcapstr *ts;
1332 	const struct termcapval *tv;
1333 	char what[8], how[8];
1334 
1335 	if (argv == NULL || argv[1] == NULL || argv[2] == NULL)
1336 		return -1;
1337 
1338 	strncpy(what, ct_encode_string(argv[1], &el->el_scratch), sizeof(what));
1339 	what[sizeof(what) - 1] = '\0';
1340 	strncpy(how,  ct_encode_string(argv[2], &el->el_scratch), sizeof(how));
1341 	how[sizeof(how) - 1] = '\0';
1342 
1343 	/*
1344          * Do the strings first
1345          */
1346 	for (ts = tstr; ts->name != NULL; ts++)
1347 		if (strcmp(ts->name, what) == 0)
1348 			break;
1349 
1350 	if (ts->name != NULL) {
1351 		terminal_alloc(el, ts, how);
1352 		terminal_setflags(el);
1353 		return 0;
1354 	}
1355 	/*
1356          * Do the numeric ones second
1357          */
1358 	for (tv = tval; tv->name != NULL; tv++)
1359 		if (strcmp(tv->name, what) == 0)
1360 			break;
1361 
1362 	if (tv->name != NULL)
1363 		return -1;
1364 
1365 	if (tv == &tval[T_pt] || tv == &tval[T_km] ||
1366 	    tv == &tval[T_am] || tv == &tval[T_xn]) {
1367 		if (strcmp(how, "yes") == 0)
1368 			el->el_terminal.t_val[tv - tval] = 1;
1369 		else if (strcmp(how, "no") == 0)
1370 			el->el_terminal.t_val[tv - tval] = 0;
1371 		else {
1372 			(void) fprintf(el->el_errfile,
1373 			    "" FSTR ": Bad value `%s'.\n", argv[0], how);
1374 			return -1;
1375 		}
1376 		terminal_setflags(el);
1377 		if (terminal_change_size(el, Val(T_li), Val(T_co)) == -1)
1378 			return -1;
1379 		return 0;
1380 	} else {
1381 		long i;
1382 		char *ep;
1383 
1384 		i = strtol(how, &ep, 10);
1385 		if (*ep != '\0') {
1386 			(void) fprintf(el->el_errfile,
1387 			    "" FSTR ": Bad value `%s'.\n", argv[0], how);
1388 			return -1;
1389 		}
1390 		el->el_terminal.t_val[tv - tval] = (int) i;
1391 		el->el_terminal.t_size.v = Val(T_co);
1392 		el->el_terminal.t_size.h = Val(T_li);
1393 		if (tv == &tval[T_co] || tv == &tval[T_li])
1394 			if (terminal_change_size(el, Val(T_li), Val(T_co))
1395 			    == -1)
1396 				return -1;
1397 		return 0;
1398 	}
1399 }
1400 
1401 
1402 /* terminal_gettc():
1403  *	Get the current terminal characteristics
1404  */
1405 protected int
1406 /*ARGSUSED*/
terminal_gettc(EditLine * el,int argc,char ** argv)1407 terminal_gettc(EditLine *el, int argc __attribute__((__unused__)), char **argv)
1408 {
1409 	const struct termcapstr *ts;
1410 	const struct termcapval *tv;
1411 	char *what;
1412 	void *how;
1413 
1414 	if (argv == NULL || argv[1] == NULL || argv[2] == NULL)
1415 		return -1;
1416 
1417 	what = argv[1];
1418 	how = argv[2];
1419 
1420 	/*
1421          * Do the strings first
1422          */
1423 	for (ts = tstr; ts->name != NULL; ts++)
1424 		if (strcmp(ts->name, what) == 0)
1425 			break;
1426 
1427 	if (ts->name != NULL) {
1428 		*(char **)how = el->el_terminal.t_str[ts - tstr];
1429 		return 0;
1430 	}
1431 	/*
1432          * Do the numeric ones second
1433          */
1434 	for (tv = tval; tv->name != NULL; tv++)
1435 		if (strcmp(tv->name, what) == 0)
1436 			break;
1437 
1438 	if (tv->name == NULL)
1439 		return -1;
1440 
1441 	if (tv == &tval[T_pt] || tv == &tval[T_km] ||
1442 	    tv == &tval[T_am] || tv == &tval[T_xn]) {
1443 		static char yes[] = "yes";
1444 		static char no[] = "no";
1445 		if (el->el_terminal.t_val[tv - tval])
1446 			*(char **)how = yes;
1447 		else
1448 			*(char **)how = no;
1449 		return 0;
1450 	} else {
1451 		*(int *)how = el->el_terminal.t_val[tv - tval];
1452 		return 0;
1453 	}
1454 }
1455 
1456 /* terminal_echotc():
1457  *	Print the termcap string out with variable substitution
1458  */
1459 protected int
1460 /*ARGSUSED*/
terminal_echotc(EditLine * el,int argc,const Char ** argv)1461 terminal_echotc(EditLine *el, int argc __attribute__((__unused__)),
1462     const Char **argv)
1463 {
1464 	char *cap, *scap;
1465 	Char *ep;
1466 	int arg_need, arg_cols, arg_rows;
1467 	int verbose = 0, silent = 0;
1468 	char *area;
1469 	static const char fmts[] = "%s\n", fmtd[] = "%d\n";
1470 	const struct termcapstr *t;
1471 	char buf[TC_BUFSIZE];
1472 	long i;
1473 
1474 	area = buf;
1475 
1476 	if (argv == NULL || argv[1] == NULL)
1477 		return -1;
1478 	argv++;
1479 
1480 	if (argv[0][0] == '-') {
1481 		switch (argv[0][1]) {
1482 		case 'v':
1483 			verbose = 1;
1484 			break;
1485 		case 's':
1486 			silent = 1;
1487 			break;
1488 		default:
1489 			/* stderror(ERR_NAME | ERR_TCUSAGE); */
1490 			break;
1491 		}
1492 		argv++;
1493 	}
1494 	if (!*argv || *argv[0] == '\0')
1495 		return 0;
1496 	if (Strcmp(*argv, STR("tabs")) == 0) {
1497 		(void) fprintf(el->el_outfile, fmts, EL_CAN_TAB ? "yes" : "no");
1498 		return 0;
1499 	} else if (Strcmp(*argv, STR("meta")) == 0) {
1500 		(void) fprintf(el->el_outfile, fmts, Val(T_km) ? "yes" : "no");
1501 		return 0;
1502 	} else if (Strcmp(*argv, STR("xn")) == 0) {
1503 		(void) fprintf(el->el_outfile, fmts, EL_HAS_MAGIC_MARGINS ?
1504 		    "yes" : "no");
1505 		return 0;
1506 	} else if (Strcmp(*argv, STR("am")) == 0) {
1507 		(void) fprintf(el->el_outfile, fmts, EL_HAS_AUTO_MARGINS ?
1508 		    "yes" : "no");
1509 		return 0;
1510 	} else if (Strcmp(*argv, STR("baud")) == 0) {
1511 		(void) fprintf(el->el_outfile, fmtd, (int)el->el_tty.t_speed);
1512 		return 0;
1513 	} else if (Strcmp(*argv, STR("rows")) == 0 ||
1514                    Strcmp(*argv, STR("lines")) == 0) {
1515 		(void) fprintf(el->el_outfile, fmtd, Val(T_li));
1516 		return 0;
1517 	} else if (Strcmp(*argv, STR("cols")) == 0) {
1518 		(void) fprintf(el->el_outfile, fmtd, Val(T_co));
1519 		return 0;
1520 	}
1521 	/*
1522          * Try to use our local definition first
1523          */
1524 	scap = NULL;
1525 	for (t = tstr; t->name != NULL; t++)
1526 		if (strcmp(t->name,
1527 		    ct_encode_string(*argv, &el->el_scratch)) == 0) {
1528 			scap = el->el_terminal.t_str[t - tstr];
1529 			break;
1530 		}
1531 	if (t->name == NULL) {
1532 		/* XXX: some systems' tgetstr needs non const */
1533                 scap = tgetstr(ct_encode_string((Char*)*argv, &el->el_scratch), &area);
1534 	}
1535 	if (!scap || scap[0] == '\0') {
1536 		if (!silent)
1537 			(void) fprintf(el->el_errfile,
1538 			    "echotc: Termcap parameter `" FSTR "' not found.\n",
1539 			    *argv);
1540 		return -1;
1541 	}
1542 	/*
1543          * Count home many values we need for this capability.
1544          */
1545 	for (cap = scap, arg_need = 0; *cap; cap++)
1546 		if (*cap == '%')
1547 			switch (*++cap) {
1548 			case 'd':
1549 			case '2':
1550 			case '3':
1551 			case '.':
1552 			case '+':
1553 				arg_need++;
1554 				break;
1555 			case '%':
1556 			case '>':
1557 			case 'i':
1558 			case 'r':
1559 			case 'n':
1560 			case 'B':
1561 			case 'D':
1562 				break;
1563 			default:
1564 				/*
1565 				 * hpux has lot's of them...
1566 				 */
1567 				if (verbose)
1568 					(void) fprintf(el->el_errfile,
1569 				"echotc: Warning: unknown termcap %% `%c'.\n",
1570 					    *cap);
1571 				/* This is bad, but I won't complain */
1572 				break;
1573 			}
1574 
1575 	switch (arg_need) {
1576 	case 0:
1577 		argv++;
1578 		if (*argv && *argv[0]) {
1579 			if (!silent)
1580 				(void) fprintf(el->el_errfile,
1581 				    "echotc: Warning: Extra argument `" FSTR "'.\n",
1582 				    *argv);
1583 			return -1;
1584 		}
1585 		terminal_tputs(el, scap, 1);
1586 		break;
1587 	case 1:
1588 		argv++;
1589 		if (!*argv || *argv[0] == '\0') {
1590 			if (!silent)
1591 				(void) fprintf(el->el_errfile,
1592 				    "echotc: Warning: Missing argument.\n");
1593 			return -1;
1594 		}
1595 		arg_cols = 0;
1596 		i = Strtol(*argv, &ep, 10);
1597 		if (*ep != '\0' || i < 0) {
1598 			if (!silent)
1599 				(void) fprintf(el->el_errfile,
1600 				    "echotc: Bad value `" FSTR "' for rows.\n",
1601 				    *argv);
1602 			return -1;
1603 		}
1604 		arg_rows = (int) i;
1605 		argv++;
1606 		if (*argv && *argv[0]) {
1607 			if (!silent)
1608 				(void) fprintf(el->el_errfile,
1609 				    "echotc: Warning: Extra argument `" FSTR
1610 				    "'.\n", *argv);
1611 			return -1;
1612 		}
1613 		terminal_tputs(el, tgoto(scap, arg_cols, arg_rows), 1);
1614 		break;
1615 	default:
1616 		/* This is wrong, but I will ignore it... */
1617 		if (verbose)
1618 			(void) fprintf(el->el_errfile,
1619 			 "echotc: Warning: Too many required arguments (%d).\n",
1620 			    arg_need);
1621 		/* FALLTHROUGH */
1622 	case 2:
1623 		argv++;
1624 		if (!*argv || *argv[0] == '\0') {
1625 			if (!silent)
1626 				(void) fprintf(el->el_errfile,
1627 				    "echotc: Warning: Missing argument.\n");
1628 			return -1;
1629 		}
1630 		i = Strtol(*argv, &ep, 10);
1631 		if (*ep != '\0' || i < 0) {
1632 			if (!silent)
1633 				(void) fprintf(el->el_errfile,
1634 				    "echotc: Bad value `" FSTR "' for cols.\n",
1635 				    *argv);
1636 			return -1;
1637 		}
1638 		arg_cols = (int) i;
1639 		argv++;
1640 		if (!*argv || *argv[0] == '\0') {
1641 			if (!silent)
1642 				(void) fprintf(el->el_errfile,
1643 				    "echotc: Warning: Missing argument.\n");
1644 			return -1;
1645 		}
1646 		i = Strtol(*argv, &ep, 10);
1647 		if (*ep != '\0' || i < 0) {
1648 			if (!silent)
1649 				(void) fprintf(el->el_errfile,
1650 				    "echotc: Bad value `" FSTR "' for rows.\n",
1651 				    *argv);
1652 			return -1;
1653 		}
1654 		arg_rows = (int) i;
1655 		if (*ep != '\0') {
1656 			if (!silent)
1657 				(void) fprintf(el->el_errfile,
1658 				    "echotc: Bad value `" FSTR "'.\n", *argv);
1659 			return -1;
1660 		}
1661 		argv++;
1662 		if (*argv && *argv[0]) {
1663 			if (!silent)
1664 				(void) fprintf(el->el_errfile,
1665 				    "echotc: Warning: Extra argument `" FSTR
1666 				    "'.\n", *argv);
1667 			return -1;
1668 		}
1669 		terminal_tputs(el, tgoto(scap, arg_cols, arg_rows), arg_rows);
1670 		break;
1671 	}
1672 	return 0;
1673 }
1674