1 /*	$NetBSD: common.c,v 1.29 2012/03/24 20:08:43 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[] = "@(#)common.c	8.1 (Berkeley) 6/4/93";
39 #else
40 __RCSID("$NetBSD: common.c,v 1.29 2012/03/24 20:08:43 christos Exp $");
41 #endif
42 #endif /* not lint && not SCCSID */
43 
44 /*
45  * common.c: Common Editor functions
46  */
47 #include "el.h"
48 
49 /* ed_end_of_file():
50  *	Indicate end of file
51  *	[^D]
52  */
53 protected el_action_t
54 /*ARGSUSED*/
ed_end_of_file(EditLine * el,Int c)55 ed_end_of_file(EditLine *el, Int c __attribute__((__unused__)))
56 {
57 
58 	re_goto_bottom(el);
59 	*el->el_line.lastchar = '\0';
60 	return CC_EOF;
61 }
62 
63 
64 /* ed_insert():
65  *	Add character to the line
66  *	Insert a character [bound to all insert keys]
67  */
68 protected el_action_t
ed_insert(EditLine * el,Int c)69 ed_insert(EditLine *el, Int c)
70 {
71 	int count = el->el_state.argument;
72 
73 	if (c == '\0')
74 		return CC_ERROR;
75 
76 	if (el->el_line.lastchar + el->el_state.argument >=
77 	    el->el_line.limit) {
78 		/* end of buffer space, try to allocate more */
79 		if (!ch_enlargebufs(el, (size_t) count))
80 			return CC_ERROR;	/* error allocating more */
81 	}
82 
83 	if (count == 1) {
84 		if (el->el_state.inputmode == MODE_INSERT
85 		    || el->el_line.cursor >= el->el_line.lastchar)
86 			c_insert(el, 1);
87 
88 		*el->el_line.cursor++ = c;
89 		re_fastaddc(el);		/* fast refresh for one char. */
90 	} else {
91 		if (el->el_state.inputmode != MODE_REPLACE_1)
92 			c_insert(el, el->el_state.argument);
93 
94 		while (count-- && el->el_line.cursor < el->el_line.lastchar)
95 			*el->el_line.cursor++ = c;
96 		re_refresh(el);
97 	}
98 
99 	if (el->el_state.inputmode == MODE_REPLACE_1)
100 		return vi_command_mode(el, 0);
101 
102 	return CC_NORM;
103 }
104 
105 
106 /* ed_delete_prev_word():
107  *	Delete from beginning of current word to cursor
108  *	[M-^?] [^W]
109  */
110 protected el_action_t
111 /*ARGSUSED*/
ed_delete_prev_word(EditLine * el,Int c)112 ed_delete_prev_word(EditLine *el, Int c __attribute__((__unused__)))
113 {
114 	Char *cp, *p, *kp;
115 
116 	if (el->el_line.cursor == el->el_line.buffer)
117 		return CC_ERROR;
118 
119 	cp = c__prev_word(el->el_line.cursor, el->el_line.buffer,
120 	    el->el_state.argument, ce__isword);
121 
122 	for (p = cp, kp = el->el_chared.c_kill.buf; p < el->el_line.cursor; p++)
123 		*kp++ = *p;
124 	el->el_chared.c_kill.last = kp;
125 
126 	c_delbefore(el, (int)(el->el_line.cursor - cp));/* delete before dot */
127 	el->el_line.cursor = cp;
128 	if (el->el_line.cursor < el->el_line.buffer)
129 		el->el_line.cursor = el->el_line.buffer; /* bounds check */
130 	return CC_REFRESH;
131 }
132 
133 
134 /* ed_delete_next_char():
135  *	Delete character under cursor
136  *	[^D] [x]
137  */
138 protected el_action_t
139 /*ARGSUSED*/
ed_delete_next_char(EditLine * el,Int c)140 ed_delete_next_char(EditLine *el, Int c __attribute__((__unused__)))
141 {
142 #ifdef DEBUG_EDIT
143 #define	EL	el->el_line
144 	(void) fprintf(el->el_errlfile,
145 	    "\nD(b: %x(%s)  c: %x(%s) last: %x(%s) limit: %x(%s)\n",
146 	    EL.buffer, EL.buffer, EL.cursor, EL.cursor, EL.lastchar,
147 	    EL.lastchar, EL.limit, EL.limit);
148 #endif
149 	if (el->el_line.cursor == el->el_line.lastchar) {
150 			/* if I'm at the end */
151 		if (el->el_map.type == MAP_VI) {
152 			if (el->el_line.cursor == el->el_line.buffer) {
153 				/* if I'm also at the beginning */
154 #ifdef KSHVI
155 				return CC_ERROR;
156 #else
157 				/* then do an EOF */
158 				terminal_writec(el, c);
159 				return CC_EOF;
160 #endif
161 			} else {
162 #ifdef KSHVI
163 				el->el_line.cursor--;
164 #else
165 				return CC_ERROR;
166 #endif
167 			}
168 		} else
169 				return CC_ERROR;
170 	}
171 	c_delafter(el, el->el_state.argument);	/* delete after dot */
172 	if (el->el_map.type == MAP_VI &&
173 	    el->el_line.cursor >= el->el_line.lastchar &&
174 	    el->el_line.cursor > el->el_line.buffer)
175 			/* bounds check */
176 		el->el_line.cursor = el->el_line.lastchar - 1;
177 	return CC_REFRESH;
178 }
179 
180 
181 /* ed_kill_line():
182  *	Cut to the end of line
183  *	[^K] [^K]
184  */
185 protected el_action_t
186 /*ARGSUSED*/
ed_kill_line(EditLine * el,Int c)187 ed_kill_line(EditLine *el, Int c __attribute__((__unused__)))
188 {
189 	Char *kp, *cp;
190 
191 	cp = el->el_line.cursor;
192 	kp = el->el_chared.c_kill.buf;
193 	while (cp < el->el_line.lastchar)
194 		*kp++ = *cp++;	/* copy it */
195 	el->el_chared.c_kill.last = kp;
196 			/* zap! -- delete to end */
197 	el->el_line.lastchar = el->el_line.cursor;
198 	return CC_REFRESH;
199 }
200 
201 
202 /* ed_move_to_end():
203  *	Move cursor to the end of line
204  *	[^E] [^E]
205  */
206 protected el_action_t
207 /*ARGSUSED*/
ed_move_to_end(EditLine * el,Int c)208 ed_move_to_end(EditLine *el, Int c __attribute__((__unused__)))
209 {
210 
211 	el->el_line.cursor = el->el_line.lastchar;
212 	if (el->el_map.type == MAP_VI) {
213 		if (el->el_chared.c_vcmd.action != NOP) {
214 			cv_delfini(el);
215 			return CC_REFRESH;
216 		}
217 #ifdef VI_MOVE
218 		el->el_line.cursor--;
219 #endif
220 	}
221 	return CC_CURSOR;
222 }
223 
224 
225 /* ed_move_to_beg():
226  *	Move cursor to the beginning of line
227  *	[^A] [^A]
228  */
229 protected el_action_t
230 /*ARGSUSED*/
ed_move_to_beg(EditLine * el,Int c)231 ed_move_to_beg(EditLine *el, Int c __attribute__((__unused__)))
232 {
233 
234 	el->el_line.cursor = el->el_line.buffer;
235 
236 	if (el->el_map.type == MAP_VI) {
237 			/* We want FIRST non space character */
238 		while (Isspace(*el->el_line.cursor))
239 			el->el_line.cursor++;
240 		if (el->el_chared.c_vcmd.action != NOP) {
241 			cv_delfini(el);
242 			return CC_REFRESH;
243 		}
244 	}
245 	return CC_CURSOR;
246 }
247 
248 
249 /* ed_transpose_chars():
250  *	Exchange the character to the left of the cursor with the one under it
251  *	[^T] [^T]
252  */
253 protected el_action_t
ed_transpose_chars(EditLine * el,Int c)254 ed_transpose_chars(EditLine *el, Int c)
255 {
256 
257 	if (el->el_line.cursor < el->el_line.lastchar) {
258 		if (el->el_line.lastchar <= &el->el_line.buffer[1])
259 			return CC_ERROR;
260 		else
261 			el->el_line.cursor++;
262 	}
263 	if (el->el_line.cursor > &el->el_line.buffer[1]) {
264 		/* must have at least two chars entered */
265 		c = el->el_line.cursor[-2];
266 		el->el_line.cursor[-2] = el->el_line.cursor[-1];
267 		el->el_line.cursor[-1] = c;
268 		return CC_REFRESH;
269 	} else
270 		return CC_ERROR;
271 }
272 
273 
274 /* ed_next_char():
275  *	Move to the right one character
276  *	[^F] [^F]
277  */
278 protected el_action_t
279 /*ARGSUSED*/
ed_next_char(EditLine * el,Int c)280 ed_next_char(EditLine *el, Int c __attribute__((__unused__)))
281 {
282 	Char *lim = el->el_line.lastchar;
283 
284 	if (el->el_line.cursor >= lim ||
285 	    (el->el_line.cursor == lim - 1 &&
286 	    el->el_map.type == MAP_VI &&
287 	    el->el_chared.c_vcmd.action == NOP))
288 		return CC_ERROR;
289 
290 	el->el_line.cursor += el->el_state.argument;
291 	if (el->el_line.cursor > lim)
292 		el->el_line.cursor = lim;
293 
294 	if (el->el_map.type == MAP_VI)
295 		if (el->el_chared.c_vcmd.action != NOP) {
296 			cv_delfini(el);
297 			return CC_REFRESH;
298 		}
299 	return CC_CURSOR;
300 }
301 
302 
303 /* ed_prev_word():
304  *	Move to the beginning of the current word
305  *	[M-b] [b]
306  */
307 protected el_action_t
308 /*ARGSUSED*/
ed_prev_word(EditLine * el,Int c)309 ed_prev_word(EditLine *el, Int c __attribute__((__unused__)))
310 {
311 
312 	if (el->el_line.cursor == el->el_line.buffer)
313 		return CC_ERROR;
314 
315 	el->el_line.cursor = c__prev_word(el->el_line.cursor,
316 	    el->el_line.buffer,
317 	    el->el_state.argument,
318 	    ce__isword);
319 
320 	if (el->el_map.type == MAP_VI)
321 		if (el->el_chared.c_vcmd.action != NOP) {
322 			cv_delfini(el);
323 			return CC_REFRESH;
324 		}
325 	return CC_CURSOR;
326 }
327 
328 
329 /* ed_prev_char():
330  *	Move to the left one character
331  *	[^B] [^B]
332  */
333 protected el_action_t
334 /*ARGSUSED*/
ed_prev_char(EditLine * el,Int c)335 ed_prev_char(EditLine *el, Int c __attribute__((__unused__)))
336 {
337 
338 	if (el->el_line.cursor > el->el_line.buffer) {
339 		el->el_line.cursor -= el->el_state.argument;
340 		if (el->el_line.cursor < el->el_line.buffer)
341 			el->el_line.cursor = el->el_line.buffer;
342 
343 		if (el->el_map.type == MAP_VI)
344 			if (el->el_chared.c_vcmd.action != NOP) {
345 				cv_delfini(el);
346 				return CC_REFRESH;
347 			}
348 		return CC_CURSOR;
349 	} else
350 		return CC_ERROR;
351 }
352 
353 
354 /* ed_quoted_insert():
355  *	Add the next character typed verbatim
356  *	[^V] [^V]
357  */
358 protected el_action_t
ed_quoted_insert(EditLine * el,Int c)359 ed_quoted_insert(EditLine *el, Int c)
360 {
361 	int num;
362 	Char tc;
363 
364 	tty_quotemode(el);
365 	num = FUN(el,getc)(el, &tc);
366 	c = tc;
367 	tty_noquotemode(el);
368 	if (num == 1)
369 		return ed_insert(el, c);
370 	else
371 		return ed_end_of_file(el, 0);
372 }
373 
374 
375 /* ed_digit():
376  *	Adds to argument or enters a digit
377  */
378 protected el_action_t
ed_digit(EditLine * el,Int c)379 ed_digit(EditLine *el, Int c)
380 {
381 
382 	if (!Isdigit(c))
383 		return CC_ERROR;
384 
385 	if (el->el_state.doingarg) {
386 			/* if doing an arg, add this in... */
387 		if (el->el_state.lastcmd == EM_UNIVERSAL_ARGUMENT)
388 			el->el_state.argument = c - '0';
389 		else {
390 			if (el->el_state.argument > 1000000)
391 				return CC_ERROR;
392 			el->el_state.argument =
393 			    (el->el_state.argument * 10) + (c - '0');
394 		}
395 		return CC_ARGHACK;
396 	}
397 
398 	return ed_insert(el, c);
399 }
400 
401 
402 /* ed_argument_digit():
403  *	Digit that starts argument
404  *	For ESC-n
405  */
406 protected el_action_t
ed_argument_digit(EditLine * el,Int c)407 ed_argument_digit(EditLine *el, Int c)
408 {
409 
410 	if (!Isdigit(c))
411 		return CC_ERROR;
412 
413 	if (el->el_state.doingarg) {
414 		if (el->el_state.argument > 1000000)
415 			return CC_ERROR;
416 		el->el_state.argument = (el->el_state.argument * 10) +
417 		    (c - '0');
418 	} else {		/* else starting an argument */
419 		el->el_state.argument = c - '0';
420 		el->el_state.doingarg = 1;
421 	}
422 	return CC_ARGHACK;
423 }
424 
425 
426 /* ed_unassigned():
427  *	Indicates unbound character
428  *	Bound to keys that are not assigned
429  */
430 protected el_action_t
431 /*ARGSUSED*/
ed_unassigned(EditLine * el,Int c)432 ed_unassigned(EditLine *el __attribute__((__unused__)),
433     Int c __attribute__((__unused__)))
434 {
435 
436 	return CC_ERROR;
437 }
438 
439 
440 /**
441  ** TTY key handling.
442  **/
443 
444 /* ed_tty_sigint():
445  *	Tty interrupt character
446  *	[^C]
447  */
448 protected el_action_t
449 /*ARGSUSED*/
ed_tty_sigint(EditLine * el,Int c)450 ed_tty_sigint(EditLine *el __attribute__((__unused__)),
451 	      Int c __attribute__((__unused__)))
452 {
453 
454 	return CC_NORM;
455 }
456 
457 
458 /* ed_tty_dsusp():
459  *	Tty delayed suspend character
460  *	[^Y]
461  */
462 protected el_action_t
463 /*ARGSUSED*/
ed_tty_dsusp(EditLine * el,Int c)464 ed_tty_dsusp(EditLine *el __attribute__((__unused__)),
465 	     Int c __attribute__((__unused__)))
466 {
467 
468 	return CC_NORM;
469 }
470 
471 
472 /* ed_tty_flush_output():
473  *	Tty flush output characters
474  *	[^O]
475  */
476 protected el_action_t
477 /*ARGSUSED*/
ed_tty_flush_output(EditLine * el,Int c)478 ed_tty_flush_output(EditLine *el __attribute__((__unused__)),
479 		    Int c __attribute__((__unused__)))
480 {
481 
482 	return CC_NORM;
483 }
484 
485 
486 /* ed_tty_sigquit():
487  *	Tty quit character
488  *	[^\]
489  */
490 protected el_action_t
491 /*ARGSUSED*/
ed_tty_sigquit(EditLine * el,Int c)492 ed_tty_sigquit(EditLine *el __attribute__((__unused__)),
493 	       Int c __attribute__((__unused__)))
494 {
495 
496 	return CC_NORM;
497 }
498 
499 
500 /* ed_tty_sigtstp():
501  *	Tty suspend character
502  *	[^Z]
503  */
504 protected el_action_t
505 /*ARGSUSED*/
ed_tty_sigtstp(EditLine * el,Int c)506 ed_tty_sigtstp(EditLine *el __attribute__((__unused__)),
507 	       Int c __attribute__((__unused__)))
508 {
509 
510 	return CC_NORM;
511 }
512 
513 
514 /* ed_tty_stop_output():
515  *	Tty disallow output characters
516  *	[^S]
517  */
518 protected el_action_t
519 /*ARGSUSED*/
ed_tty_stop_output(EditLine * el,Int c)520 ed_tty_stop_output(EditLine *el __attribute__((__unused__)),
521 		   Int c __attribute__((__unused__)))
522 {
523 
524 	return CC_NORM;
525 }
526 
527 
528 /* ed_tty_start_output():
529  *	Tty allow output characters
530  *	[^Q]
531  */
532 protected el_action_t
533 /*ARGSUSED*/
ed_tty_start_output(EditLine * el,Int c)534 ed_tty_start_output(EditLine *el __attribute__((__unused__)),
535 		    Int c __attribute__((__unused__)))
536 {
537 
538 	return CC_NORM;
539 }
540 
541 
542 /* ed_newline():
543  *	Execute command
544  *	[^J]
545  */
546 protected el_action_t
547 /*ARGSUSED*/
ed_newline(EditLine * el,Int c)548 ed_newline(EditLine *el, Int c __attribute__((__unused__)))
549 {
550 
551 	re_goto_bottom(el);
552 	*el->el_line.lastchar++ = '\n';
553 	*el->el_line.lastchar = '\0';
554 	return CC_NEWLINE;
555 }
556 
557 
558 /* ed_delete_prev_char():
559  *	Delete the character to the left of the cursor
560  *	[^?]
561  */
562 protected el_action_t
563 /*ARGSUSED*/
ed_delete_prev_char(EditLine * el,Int c)564 ed_delete_prev_char(EditLine *el, Int c __attribute__((__unused__)))
565 {
566 
567 	if (el->el_line.cursor <= el->el_line.buffer)
568 		return CC_ERROR;
569 
570 	c_delbefore(el, el->el_state.argument);
571 	el->el_line.cursor -= el->el_state.argument;
572 	if (el->el_line.cursor < el->el_line.buffer)
573 		el->el_line.cursor = el->el_line.buffer;
574 	return CC_REFRESH;
575 }
576 
577 
578 /* ed_clear_screen():
579  *	Clear screen leaving current line at the top
580  *	[^L]
581  */
582 protected el_action_t
583 /*ARGSUSED*/
ed_clear_screen(EditLine * el,Int c)584 ed_clear_screen(EditLine *el, Int c __attribute__((__unused__)))
585 {
586 
587 	terminal_clear_screen(el);	/* clear the whole real screen */
588 	re_clear_display(el);	/* reset everything */
589 	return CC_REFRESH;
590 }
591 
592 
593 /* ed_redisplay():
594  *	Redisplay everything
595  *	^R
596  */
597 protected el_action_t
598 /*ARGSUSED*/
ed_redisplay(EditLine * el,Int c)599 ed_redisplay(EditLine *el __attribute__((__unused__)),
600 	     Int c __attribute__((__unused__)))
601 {
602 
603 	return CC_REDISPLAY;
604 }
605 
606 
607 /* ed_start_over():
608  *	Erase current line and start from scratch
609  *	[^G]
610  */
611 protected el_action_t
612 /*ARGSUSED*/
ed_start_over(EditLine * el,Int c)613 ed_start_over(EditLine *el, Int c __attribute__((__unused__)))
614 {
615 
616 	ch_reset(el, 0);
617 	return CC_REFRESH;
618 }
619 
620 
621 /* ed_sequence_lead_in():
622  *	First character in a bound sequence
623  *	Placeholder for external keys
624  */
625 protected el_action_t
626 /*ARGSUSED*/
ed_sequence_lead_in(EditLine * el,Int c)627 ed_sequence_lead_in(EditLine *el __attribute__((__unused__)),
628 		    Int c __attribute__((__unused__)))
629 {
630 
631 	return CC_NORM;
632 }
633 
634 
635 /* ed_prev_history():
636  *	Move to the previous history line
637  *	[^P] [k]
638  */
639 protected el_action_t
640 /*ARGSUSED*/
ed_prev_history(EditLine * el,Int c)641 ed_prev_history(EditLine *el, Int c __attribute__((__unused__)))
642 {
643 	char beep = 0;
644 	int sv_event = el->el_history.eventno;
645 
646 	el->el_chared.c_undo.len = -1;
647 	*el->el_line.lastchar = '\0';		/* just in case */
648 
649 	if (el->el_history.eventno == 0) {	/* save the current buffer
650 						 * away */
651 		(void) Strncpy(el->el_history.buf, el->el_line.buffer,
652 		    EL_BUFSIZ);
653 		el->el_history.last = el->el_history.buf +
654 		    (el->el_line.lastchar - el->el_line.buffer);
655 	}
656 	el->el_history.eventno += el->el_state.argument;
657 
658 	if (hist_get(el) == CC_ERROR) {
659 		if (el->el_map.type == MAP_VI) {
660 			el->el_history.eventno = sv_event;
661 
662 		}
663 		beep = 1;
664 		/* el->el_history.eventno was fixed by first call */
665 		(void) hist_get(el);
666 	}
667 	if (beep)
668 		return CC_REFRESH_BEEP;
669 	return CC_REFRESH;
670 }
671 
672 
673 /* ed_next_history():
674  *	Move to the next history line
675  *	[^N] [j]
676  */
677 protected el_action_t
678 /*ARGSUSED*/
ed_next_history(EditLine * el,Int c)679 ed_next_history(EditLine *el, Int c __attribute__((__unused__)))
680 {
681 	el_action_t beep = CC_REFRESH, rval;
682 
683 	el->el_chared.c_undo.len = -1;
684 	*el->el_line.lastchar = '\0';	/* just in case */
685 
686 	el->el_history.eventno -= el->el_state.argument;
687 
688 	if (el->el_history.eventno < 0) {
689 		el->el_history.eventno = 0;
690 		beep = CC_REFRESH_BEEP;
691 	}
692 	rval = hist_get(el);
693 	if (rval == CC_REFRESH)
694 		return beep;
695 	return rval;
696 
697 }
698 
699 
700 /* ed_search_prev_history():
701  *	Search previous in history for a line matching the current
702  *	next search history [M-P] [K]
703  */
704 protected el_action_t
705 /*ARGSUSED*/
ed_search_prev_history(EditLine * el,Int c)706 ed_search_prev_history(EditLine *el, Int c __attribute__((__unused__)))
707 {
708 	const Char *hp;
709 	int h;
710 	bool_t found = 0;
711 
712 	el->el_chared.c_vcmd.action = NOP;
713 	el->el_chared.c_undo.len = -1;
714 	*el->el_line.lastchar = '\0';	/* just in case */
715 	if (el->el_history.eventno < 0) {
716 #ifdef DEBUG_EDIT
717 		(void) fprintf(el->el_errfile,
718 		    "e_prev_search_hist(): eventno < 0;\n");
719 #endif
720 		el->el_history.eventno = 0;
721 		return CC_ERROR;
722 	}
723 	if (el->el_history.eventno == 0) {
724 		(void) Strncpy(el->el_history.buf, el->el_line.buffer,
725 		    EL_BUFSIZ);
726 		el->el_history.last = el->el_history.buf +
727 		    (el->el_line.lastchar - el->el_line.buffer);
728 	}
729 	if (el->el_history.ref == NULL)
730 		return CC_ERROR;
731 
732 	hp = HIST_FIRST(el);
733 	if (hp == NULL)
734 		return CC_ERROR;
735 
736 	c_setpat(el);		/* Set search pattern !! */
737 
738 	for (h = 1; h <= el->el_history.eventno; h++)
739 		hp = HIST_NEXT(el);
740 
741 	while (hp != NULL) {
742 #ifdef SDEBUG
743 		(void) fprintf(el->el_errfile, "Comparing with \"%s\"\n", hp);
744 #endif
745 		if ((Strncmp(hp, el->el_line.buffer, (size_t)
746 			    (el->el_line.lastchar - el->el_line.buffer)) ||
747 			hp[el->el_line.lastchar - el->el_line.buffer]) &&
748 		    c_hmatch(el, hp)) {
749 			found++;
750 			break;
751 		}
752 		h++;
753 		hp = HIST_NEXT(el);
754 	}
755 
756 	if (!found) {
757 #ifdef SDEBUG
758 		(void) fprintf(el->el_errfile, "not found\n");
759 #endif
760 		return CC_ERROR;
761 	}
762 	el->el_history.eventno = h;
763 
764 	return hist_get(el);
765 }
766 
767 
768 /* ed_search_next_history():
769  *	Search next in history for a line matching the current
770  *	[M-N] [J]
771  */
772 protected el_action_t
773 /*ARGSUSED*/
ed_search_next_history(EditLine * el,Int c)774 ed_search_next_history(EditLine *el, Int c __attribute__((__unused__)))
775 {
776 	const Char *hp;
777 	int h;
778 	bool_t found = 0;
779 
780 	el->el_chared.c_vcmd.action = NOP;
781 	el->el_chared.c_undo.len = -1;
782 	*el->el_line.lastchar = '\0';	/* just in case */
783 
784 	if (el->el_history.eventno == 0)
785 		return CC_ERROR;
786 
787 	if (el->el_history.ref == NULL)
788 		return CC_ERROR;
789 
790 	hp = HIST_FIRST(el);
791 	if (hp == NULL)
792 		return CC_ERROR;
793 
794 	c_setpat(el);		/* Set search pattern !! */
795 
796 	for (h = 1; h < el->el_history.eventno && hp; h++) {
797 #ifdef SDEBUG
798 		(void) fprintf(el->el_errfile, "Comparing with \"%s\"\n", hp);
799 #endif
800 		if ((Strncmp(hp, el->el_line.buffer, (size_t)
801 			    (el->el_line.lastchar - el->el_line.buffer)) ||
802 			hp[el->el_line.lastchar - el->el_line.buffer]) &&
803 		    c_hmatch(el, hp))
804 			found = h;
805 		hp = HIST_NEXT(el);
806 	}
807 
808 	if (!found) {		/* is it the current history number? */
809 		if (!c_hmatch(el, el->el_history.buf)) {
810 #ifdef SDEBUG
811 			(void) fprintf(el->el_errfile, "not found\n");
812 #endif
813 			return CC_ERROR;
814 		}
815 	}
816 	el->el_history.eventno = found;
817 
818 	return hist_get(el);
819 }
820 
821 
822 /* ed_prev_line():
823  *	Move up one line
824  *	Could be [k] [^p]
825  */
826 protected el_action_t
827 /*ARGSUSED*/
ed_prev_line(EditLine * el,Int c)828 ed_prev_line(EditLine *el, Int c __attribute__((__unused__)))
829 {
830 	Char *ptr;
831 	int nchars = c_hpos(el);
832 
833 	/*
834          * Move to the line requested
835          */
836 	if (*(ptr = el->el_line.cursor) == '\n')
837 		ptr--;
838 
839 	for (; ptr >= el->el_line.buffer; ptr--)
840 		if (*ptr == '\n' && --el->el_state.argument <= 0)
841 			break;
842 
843 	if (el->el_state.argument > 0)
844 		return CC_ERROR;
845 
846 	/*
847          * Move to the beginning of the line
848          */
849 	for (ptr--; ptr >= el->el_line.buffer && *ptr != '\n'; ptr--)
850 		continue;
851 
852 	/*
853          * Move to the character requested
854          */
855 	for (ptr++;
856 	    nchars-- > 0 && ptr < el->el_line.lastchar && *ptr != '\n';
857 	    ptr++)
858 		continue;
859 
860 	el->el_line.cursor = ptr;
861 	return CC_CURSOR;
862 }
863 
864 
865 /* ed_next_line():
866  *	Move down one line
867  *	Could be [j] [^n]
868  */
869 protected el_action_t
870 /*ARGSUSED*/
ed_next_line(EditLine * el,Int c)871 ed_next_line(EditLine *el, Int c __attribute__((__unused__)))
872 {
873 	Char *ptr;
874 	int nchars = c_hpos(el);
875 
876 	/*
877          * Move to the line requested
878          */
879 	for (ptr = el->el_line.cursor; ptr < el->el_line.lastchar; ptr++)
880 		if (*ptr == '\n' && --el->el_state.argument <= 0)
881 			break;
882 
883 	if (el->el_state.argument > 0)
884 		return CC_ERROR;
885 
886 	/*
887          * Move to the character requested
888          */
889 	for (ptr++;
890 	    nchars-- > 0 && ptr < el->el_line.lastchar && *ptr != '\n';
891 	    ptr++)
892 		continue;
893 
894 	el->el_line.cursor = ptr;
895 	return CC_CURSOR;
896 }
897 
898 
899 /* ed_command():
900  *	Editline extended command
901  *	[M-X] [:]
902  */
903 protected el_action_t
904 /*ARGSUSED*/
ed_command(EditLine * el,Int c)905 ed_command(EditLine *el, Int c __attribute__((__unused__)))
906 {
907 	Char tmpbuf[EL_BUFSIZ];
908 	int tmplen;
909 
910 	tmplen = c_gets(el, tmpbuf, STR("\n: "));
911 	terminal__putc(el, '\n');
912 
913 	if (tmplen < 0 || (tmpbuf[tmplen] = 0, parse_line(el, tmpbuf)) == -1)
914 		terminal_beep(el);
915 
916 	el->el_map.current = el->el_map.key;
917 	re_clear_display(el);
918 	return CC_REFRESH;
919 }
920