xref: /freebsd/contrib/libedit/common.c (revision 7fdf597e96a02165cfe22ff357b857d5fa15ed8a)
1 /*	$NetBSD: common.c,v 1.49 2020/03/30 06:54:37 ryo 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 1.49 2020/03/30 06:54:37 ryo Exp $");
41 #endif
42 #endif /* not lint && not SCCSID */
43 
44 /*
45  * common.c: Common Editor functions
46  */
47 #include <ctype.h>
48 #include <string.h>
49 
50 #include "el.h"
51 #include "common.h"
52 #include "fcns.h"
53 #include "parse.h"
54 #include "vi.h"
55 
56 /* ed_end_of_file():
57  *	Indicate end of file
58  *	[^D]
59  */
60 libedit_private el_action_t
61 /*ARGSUSED*/
62 ed_end_of_file(EditLine *el, wint_t c __attribute__((__unused__)))
63 {
64 
65 	re_goto_bottom(el);
66 	*el->el_line.lastchar = '\0';
67 	return CC_EOF;
68 }
69 
70 
71 /* ed_insert():
72  *	Add character to the line
73  *	Insert a character [bound to all insert keys]
74  */
75 libedit_private el_action_t
76 ed_insert(EditLine *el, wint_t c)
77 {
78 	int count = el->el_state.argument;
79 
80 	if (c == '\0')
81 		return CC_ERROR;
82 
83 	if (el->el_line.lastchar + el->el_state.argument >=
84 	    el->el_line.limit) {
85 		/* end of buffer space, try to allocate more */
86 		if (!ch_enlargebufs(el, (size_t) count))
87 			return CC_ERROR;	/* error allocating more */
88 	}
89 
90 	if (count == 1) {
91 		if (el->el_state.inputmode == MODE_INSERT
92 		    || el->el_line.cursor >= el->el_line.lastchar)
93 			c_insert(el, 1);
94 
95 		*el->el_line.cursor++ = c;
96 		re_fastaddc(el);		/* fast refresh for one char. */
97 	} else {
98 		if (el->el_state.inputmode != MODE_REPLACE_1)
99 			c_insert(el, el->el_state.argument);
100 
101 		while (count-- && el->el_line.cursor < el->el_line.lastchar)
102 			*el->el_line.cursor++ = c;
103 		re_refresh(el);
104 	}
105 
106 	if (el->el_state.inputmode == MODE_REPLACE_1)
107 		return vi_command_mode(el, 0);
108 
109 	return CC_NORM;
110 }
111 
112 
113 /* ed_delete_prev_word():
114  *	Delete from beginning of current word to cursor
115  *	[M-^?] [^W]
116  */
117 libedit_private el_action_t
118 /*ARGSUSED*/
119 ed_delete_prev_word(EditLine *el, wint_t c __attribute__((__unused__)))
120 {
121 	wchar_t *cp, *p, *kp;
122 
123 	if (el->el_line.cursor == el->el_line.buffer)
124 		return CC_ERROR;
125 
126 	cp = c__prev_word(el->el_line.cursor, el->el_line.buffer,
127 	    el->el_state.argument, ce__isword);
128 
129 	for (p = cp, kp = el->el_chared.c_kill.buf; p < el->el_line.cursor; p++)
130 		*kp++ = *p;
131 	el->el_chared.c_kill.last = kp;
132 
133 	c_delbefore(el, (int)(el->el_line.cursor - cp));/* delete before dot */
134 	el->el_line.cursor = cp;
135 	if (el->el_line.cursor < el->el_line.buffer)
136 		el->el_line.cursor = el->el_line.buffer; /* bounds check */
137 	return CC_REFRESH;
138 }
139 
140 
141 /* ed_delete_next_char():
142  *	Delete character under cursor
143  *	[^D] [x]
144  */
145 libedit_private el_action_t
146 /*ARGSUSED*/
147 ed_delete_next_char(EditLine *el, wint_t c __attribute__((__unused__)))
148 {
149 #ifdef DEBUG_EDIT
150 #define	EL	el->el_line
151 	(void) fprintf(el->el_errfile,
152 	    "\nD(b: %p(%ls)  c: %p(%ls) last: %p(%ls) limit: %p(%ls)\n",
153 	    EL.buffer, EL.buffer, EL.cursor, EL.cursor, EL.lastchar,
154 	    EL.lastchar, EL.limit, EL.limit);
155 #endif
156 	if (el->el_line.cursor == el->el_line.lastchar) {
157 			/* if I'm at the end */
158 		if (el->el_map.type == MAP_VI) {
159 			if (el->el_line.cursor == el->el_line.buffer) {
160 				/* if I'm also at the beginning */
161 #ifdef KSHVI
162 				return CC_ERROR;
163 #else
164 				/* then do an EOF */
165 				terminal_writec(el, c);
166 				return CC_EOF;
167 #endif
168 			} else {
169 #ifdef KSHVI
170 				el->el_line.cursor--;
171 #else
172 				return CC_ERROR;
173 #endif
174 			}
175 		} else
176 				return CC_ERROR;
177 	}
178 	c_delafter(el, el->el_state.argument);	/* delete after dot */
179 	if (el->el_map.type == MAP_VI &&
180 	    el->el_line.cursor >= el->el_line.lastchar &&
181 	    el->el_line.cursor > el->el_line.buffer)
182 			/* bounds check */
183 		el->el_line.cursor = el->el_line.lastchar - 1;
184 	return CC_REFRESH;
185 }
186 
187 
188 /* ed_kill_line():
189  *	Cut to the end of line
190  *	[^K] [^K]
191  */
192 libedit_private el_action_t
193 /*ARGSUSED*/
194 ed_kill_line(EditLine *el, wint_t c __attribute__((__unused__)))
195 {
196 	wchar_t *kp, *cp;
197 
198 	cp = el->el_line.cursor;
199 	kp = el->el_chared.c_kill.buf;
200 	while (cp < el->el_line.lastchar)
201 		*kp++ = *cp++;	/* copy it */
202 	el->el_chared.c_kill.last = kp;
203 			/* zap! -- delete to end */
204 	el->el_line.lastchar = el->el_line.cursor;
205 	return CC_REFRESH;
206 }
207 
208 
209 /* ed_move_to_end():
210  *	Move cursor to the end of line
211  *	[^E] [^E]
212  */
213 libedit_private el_action_t
214 /*ARGSUSED*/
215 ed_move_to_end(EditLine *el, wint_t c __attribute__((__unused__)))
216 {
217 
218 	el->el_line.cursor = el->el_line.lastchar;
219 	if (el->el_map.type == MAP_VI) {
220 		if (el->el_chared.c_vcmd.action != NOP) {
221 			cv_delfini(el);
222 			return CC_REFRESH;
223 		}
224 #ifdef VI_MOVE
225 		el->el_line.cursor--;
226 #endif
227 	}
228 	return CC_CURSOR;
229 }
230 
231 
232 /* ed_move_to_beg():
233  *	Move cursor to the beginning of line
234  *	[^A] [^A]
235  */
236 libedit_private el_action_t
237 /*ARGSUSED*/
238 ed_move_to_beg(EditLine *el, wint_t c __attribute__((__unused__)))
239 {
240 
241 	el->el_line.cursor = el->el_line.buffer;
242 
243 	if (el->el_map.type == MAP_VI) {
244 			/* We want FIRST non space character */
245 		while (iswspace(*el->el_line.cursor))
246 			el->el_line.cursor++;
247 		if (el->el_chared.c_vcmd.action != NOP) {
248 			cv_delfini(el);
249 			return CC_REFRESH;
250 		}
251 	}
252 	return CC_CURSOR;
253 }
254 
255 
256 /* ed_transpose_chars():
257  *	Exchange the character to the left of the cursor with the one under it
258  *	[^T] [^T]
259  */
260 libedit_private el_action_t
261 ed_transpose_chars(EditLine *el, wint_t c)
262 {
263 
264 	if (el->el_line.cursor < el->el_line.lastchar) {
265 		if (el->el_line.lastchar <= &el->el_line.buffer[1])
266 			return CC_ERROR;
267 		else
268 			el->el_line.cursor++;
269 	}
270 	if (el->el_line.cursor > &el->el_line.buffer[1]) {
271 		/* must have at least two chars entered */
272 		c = el->el_line.cursor[-2];
273 		el->el_line.cursor[-2] = el->el_line.cursor[-1];
274 		el->el_line.cursor[-1] = c;
275 		return CC_REFRESH;
276 	} else
277 		return CC_ERROR;
278 }
279 
280 
281 /* ed_next_char():
282  *	Move to the right one character
283  *	[^F] [^F]
284  */
285 libedit_private el_action_t
286 /*ARGSUSED*/
287 ed_next_char(EditLine *el, wint_t c __attribute__((__unused__)))
288 {
289 	wchar_t *lim = el->el_line.lastchar;
290 
291 	if (el->el_line.cursor >= lim ||
292 	    (el->el_line.cursor == lim - 1 &&
293 	    el->el_map.type == MAP_VI &&
294 	    el->el_chared.c_vcmd.action == NOP))
295 		return CC_ERROR;
296 
297 	el->el_line.cursor += el->el_state.argument;
298 	if (el->el_line.cursor > lim)
299 		el->el_line.cursor = lim;
300 
301 	if (el->el_map.type == MAP_VI)
302 		if (el->el_chared.c_vcmd.action != NOP) {
303 			cv_delfini(el);
304 			return CC_REFRESH;
305 		}
306 	return CC_CURSOR;
307 }
308 
309 
310 /* ed_prev_word():
311  *	Move to the beginning of the current word
312  *	[M-b] [b]
313  */
314 libedit_private el_action_t
315 /*ARGSUSED*/
316 ed_prev_word(EditLine *el, wint_t c __attribute__((__unused__)))
317 {
318 
319 	if (el->el_line.cursor == el->el_line.buffer)
320 		return CC_ERROR;
321 
322 	el->el_line.cursor = c__prev_word(el->el_line.cursor,
323 	    el->el_line.buffer,
324 	    el->el_state.argument,
325 	    ce__isword);
326 
327 	if (el->el_map.type == MAP_VI)
328 		if (el->el_chared.c_vcmd.action != NOP) {
329 			cv_delfini(el);
330 			return CC_REFRESH;
331 		}
332 	return CC_CURSOR;
333 }
334 
335 
336 /* ed_prev_char():
337  *	Move to the left one character
338  *	[^B] [^B]
339  */
340 libedit_private el_action_t
341 /*ARGSUSED*/
342 ed_prev_char(EditLine *el, wint_t c __attribute__((__unused__)))
343 {
344 
345 	if (el->el_line.cursor > el->el_line.buffer) {
346 		el->el_line.cursor -= el->el_state.argument;
347 		if (el->el_line.cursor < el->el_line.buffer)
348 			el->el_line.cursor = el->el_line.buffer;
349 
350 		if (el->el_map.type == MAP_VI)
351 			if (el->el_chared.c_vcmd.action != NOP) {
352 				cv_delfini(el);
353 				return CC_REFRESH;
354 			}
355 		return CC_CURSOR;
356 	} else
357 		return CC_ERROR;
358 }
359 
360 
361 /* ed_quoted_insert():
362  *	Add the next character typed verbatim
363  *	[^V] [^V]
364  */
365 libedit_private el_action_t
366 /*ARGSUSED*/
367 ed_quoted_insert(EditLine *el, wint_t c __attribute__((__unused__)))
368 {
369 	int num;
370 	wchar_t ch;
371 
372 	tty_quotemode(el);
373 	num = el_wgetc(el, &ch);
374 	tty_noquotemode(el);
375 	if (num == 1)
376 		return ed_insert(el, ch);
377 	else
378 		return ed_end_of_file(el, 0);
379 }
380 
381 
382 /* ed_digit():
383  *	Adds to argument or enters a digit
384  */
385 libedit_private el_action_t
386 ed_digit(EditLine *el, wint_t c)
387 {
388 
389 	if (!iswdigit(c))
390 		return CC_ERROR;
391 
392 	if (el->el_state.doingarg) {
393 			/* if doing an arg, add this in... */
394 		if (el->el_state.lastcmd == EM_UNIVERSAL_ARGUMENT)
395 			el->el_state.argument = c - '0';
396 		else {
397 			if (el->el_state.argument > 1000000)
398 				return CC_ERROR;
399 			el->el_state.argument =
400 			    (el->el_state.argument * 10) + (c - '0');
401 		}
402 		return CC_ARGHACK;
403 	}
404 
405 	return ed_insert(el, c);
406 }
407 
408 
409 /* ed_argument_digit():
410  *	Digit that starts argument
411  *	For ESC-n
412  */
413 libedit_private el_action_t
414 ed_argument_digit(EditLine *el, wint_t c)
415 {
416 
417 	if (!iswdigit(c))
418 		return CC_ERROR;
419 
420 	if (el->el_state.doingarg) {
421 		if (el->el_state.argument > 1000000)
422 			return CC_ERROR;
423 		el->el_state.argument = (el->el_state.argument * 10) +
424 		    (c - '0');
425 	} else {		/* else starting an argument */
426 		el->el_state.argument = c - '0';
427 		el->el_state.doingarg = 1;
428 	}
429 	return CC_ARGHACK;
430 }
431 
432 
433 /* ed_unassigned():
434  *	Indicates unbound character
435  *	Bound to keys that are not assigned
436  */
437 libedit_private el_action_t
438 /*ARGSUSED*/
439 ed_unassigned(EditLine *el __attribute__((__unused__)),
440     wint_t c __attribute__((__unused__)))
441 {
442 
443 	return CC_ERROR;
444 }
445 
446 
447 /* ed_ignore():
448  *	Input characters that have no effect
449  *	[^C ^O ^Q ^S ^Z ^\ ^]] [^C ^O ^Q ^S ^\]
450  */
451 libedit_private el_action_t
452 /*ARGSUSED*/
453 ed_ignore(EditLine *el __attribute__((__unused__)),
454 	      wint_t c __attribute__((__unused__)))
455 {
456 
457 	return CC_NORM;
458 }
459 
460 
461 /* ed_newline():
462  *	Execute command
463  *	[^J]
464  */
465 libedit_private el_action_t
466 /*ARGSUSED*/
467 ed_newline(EditLine *el, wint_t c __attribute__((__unused__)))
468 {
469 
470 	re_goto_bottom(el);
471 	*el->el_line.lastchar++ = '\n';
472 	*el->el_line.lastchar = '\0';
473 	return CC_NEWLINE;
474 }
475 
476 
477 /* ed_delete_prev_char():
478  *	Delete the character to the left of the cursor
479  *	[^?]
480  */
481 libedit_private el_action_t
482 /*ARGSUSED*/
483 ed_delete_prev_char(EditLine *el, wint_t c __attribute__((__unused__)))
484 {
485 
486 	if (el->el_line.cursor <= el->el_line.buffer)
487 		return CC_ERROR;
488 
489 	c_delbefore(el, el->el_state.argument);
490 	el->el_line.cursor -= el->el_state.argument;
491 	if (el->el_line.cursor < el->el_line.buffer)
492 		el->el_line.cursor = el->el_line.buffer;
493 	return CC_REFRESH;
494 }
495 
496 
497 /* ed_clear_screen():
498  *	Clear screen leaving current line at the top
499  *	[^L]
500  */
501 libedit_private el_action_t
502 /*ARGSUSED*/
503 ed_clear_screen(EditLine *el, wint_t c __attribute__((__unused__)))
504 {
505 
506 	terminal_clear_screen(el);	/* clear the whole real screen */
507 	re_clear_display(el);	/* reset everything */
508 	return CC_REFRESH;
509 }
510 
511 
512 /* ed_redisplay():
513  *	Redisplay everything
514  *	^R
515  */
516 libedit_private el_action_t
517 /*ARGSUSED*/
518 ed_redisplay(EditLine *el __attribute__((__unused__)),
519 	     wint_t c __attribute__((__unused__)))
520 {
521 
522 	return CC_REDISPLAY;
523 }
524 
525 
526 /* ed_start_over():
527  *	Erase current line and start from scratch
528  *	[^G]
529  */
530 libedit_private el_action_t
531 /*ARGSUSED*/
532 ed_start_over(EditLine *el, wint_t c __attribute__((__unused__)))
533 {
534 
535 	ch_reset(el);
536 	return CC_REFRESH;
537 }
538 
539 
540 /* ed_sequence_lead_in():
541  *	First character in a bound sequence
542  *	Placeholder for external keys
543  */
544 libedit_private el_action_t
545 /*ARGSUSED*/
546 ed_sequence_lead_in(EditLine *el __attribute__((__unused__)),
547 		    wint_t c __attribute__((__unused__)))
548 {
549 
550 	return CC_NORM;
551 }
552 
553 
554 /* ed_prev_history():
555  *	Move to the previous history line
556  *	[^P] [k]
557  */
558 libedit_private el_action_t
559 /*ARGSUSED*/
560 ed_prev_history(EditLine *el, wint_t c __attribute__((__unused__)))
561 {
562 	char beep = 0;
563 	int sv_event = el->el_history.eventno;
564 
565 	el->el_chared.c_undo.len = -1;
566 	*el->el_line.lastchar = '\0';		/* just in case */
567 
568 	if (el->el_history.eventno == 0) {	/* save the current buffer
569 						 * away */
570 		(void) wcsncpy(el->el_history.buf, el->el_line.buffer,
571 		    EL_BUFSIZ);
572 		el->el_history.last = el->el_history.buf +
573 		    (el->el_line.lastchar - el->el_line.buffer);
574 	}
575 	el->el_history.eventno += el->el_state.argument;
576 
577 	if (hist_get(el) == CC_ERROR) {
578 		if (el->el_map.type == MAP_VI) {
579 			el->el_history.eventno = sv_event;
580 		}
581 		beep = 1;
582 		/* el->el_history.eventno was fixed by first call */
583 		(void) hist_get(el);
584 	}
585 	if (beep)
586 		return CC_REFRESH_BEEP;
587 	return CC_REFRESH;
588 }
589 
590 
591 /* ed_next_history():
592  *	Move to the next history line
593  *	[^N] [j]
594  */
595 libedit_private el_action_t
596 /*ARGSUSED*/
597 ed_next_history(EditLine *el, wint_t c __attribute__((__unused__)))
598 {
599 	el_action_t beep = CC_REFRESH, rval;
600 
601 	el->el_chared.c_undo.len = -1;
602 	*el->el_line.lastchar = '\0';	/* just in case */
603 
604 	el->el_history.eventno -= el->el_state.argument;
605 
606 	if (el->el_history.eventno < 0) {
607 		el->el_history.eventno = 0;
608 		beep = CC_REFRESH_BEEP;
609 	}
610 	rval = hist_get(el);
611 	if (rval == CC_REFRESH)
612 		return beep;
613 	return rval;
614 
615 }
616 
617 
618 /* ed_search_prev_history():
619  *	Search previous in history for a line matching the current
620  *	next search history [M-P] [K]
621  */
622 libedit_private el_action_t
623 /*ARGSUSED*/
624 ed_search_prev_history(EditLine *el, wint_t c __attribute__((__unused__)))
625 {
626 	const wchar_t *hp;
627 	int h;
628 	int found = 0;
629 
630 	el->el_chared.c_vcmd.action = NOP;
631 	el->el_chared.c_undo.len = -1;
632 	*el->el_line.lastchar = '\0';	/* just in case */
633 	if (el->el_history.eventno < 0) {
634 #ifdef DEBUG_EDIT
635 		(void) fprintf(el->el_errfile,
636 		    "e_prev_search_hist(): eventno < 0;\n");
637 #endif
638 		el->el_history.eventno = 0;
639 		return CC_ERROR;
640 	}
641 	if (el->el_history.eventno == 0) {
642 		(void) wcsncpy(el->el_history.buf, el->el_line.buffer,
643 		    EL_BUFSIZ);
644 		el->el_history.last = el->el_history.buf +
645 		    (el->el_line.lastchar - el->el_line.buffer);
646 	}
647 	if (el->el_history.ref == NULL)
648 		return CC_ERROR;
649 
650 	hp = HIST_FIRST(el);
651 	if (hp == NULL)
652 		return CC_ERROR;
653 
654 	c_setpat(el);		/* Set search pattern !! */
655 
656 	for (h = 1; h <= el->el_history.eventno; h++)
657 		hp = HIST_NEXT(el);
658 
659 	while (hp != NULL) {
660 #ifdef SDEBUG
661 		(void) fprintf(el->el_errfile, "Comparing with \"%ls\"\n", hp);
662 #endif
663 		if ((wcsncmp(hp, el->el_line.buffer, (size_t)
664 			    (el->el_line.lastchar - el->el_line.buffer)) ||
665 			hp[el->el_line.lastchar - el->el_line.buffer]) &&
666 		    c_hmatch(el, hp)) {
667 			found = 1;
668 			break;
669 		}
670 		h++;
671 		hp = HIST_NEXT(el);
672 	}
673 
674 	if (!found) {
675 #ifdef SDEBUG
676 		(void) fprintf(el->el_errfile, "not found\n");
677 #endif
678 		return CC_ERROR;
679 	}
680 	el->el_history.eventno = h;
681 
682 	return hist_get(el);
683 }
684 
685 
686 /* ed_search_next_history():
687  *	Search next in history for a line matching the current
688  *	[M-N] [J]
689  */
690 libedit_private el_action_t
691 /*ARGSUSED*/
692 ed_search_next_history(EditLine *el, wint_t c __attribute__((__unused__)))
693 {
694 	const wchar_t *hp;
695 	int h;
696 	int found = 0;
697 
698 	el->el_chared.c_vcmd.action = NOP;
699 	el->el_chared.c_undo.len = -1;
700 	*el->el_line.lastchar = '\0';	/* just in case */
701 
702 	if (el->el_history.eventno == 0)
703 		return CC_ERROR;
704 
705 	if (el->el_history.ref == NULL)
706 		return CC_ERROR;
707 
708 	hp = HIST_FIRST(el);
709 	if (hp == NULL)
710 		return CC_ERROR;
711 
712 	c_setpat(el);		/* Set search pattern !! */
713 
714 	for (h = 1; h < el->el_history.eventno && hp; h++) {
715 #ifdef SDEBUG
716 		(void) fprintf(el->el_errfile, "Comparing with \"%ls\"\n", hp);
717 #endif
718 		if ((wcsncmp(hp, el->el_line.buffer, (size_t)
719 			    (el->el_line.lastchar - el->el_line.buffer)) ||
720 			hp[el->el_line.lastchar - el->el_line.buffer]) &&
721 		    c_hmatch(el, hp))
722 			found = h;
723 		hp = HIST_NEXT(el);
724 	}
725 
726 	if (!found) {		/* is it the current history number? */
727 		if (!c_hmatch(el, el->el_history.buf)) {
728 #ifdef SDEBUG
729 			(void) fprintf(el->el_errfile, "not found\n");
730 #endif
731 			return CC_ERROR;
732 		}
733 	}
734 	el->el_history.eventno = found;
735 
736 	return hist_get(el);
737 }
738 
739 
740 /* ed_prev_line():
741  *	Move up one line
742  *	Could be [k] [^p]
743  */
744 libedit_private el_action_t
745 /*ARGSUSED*/
746 ed_prev_line(EditLine *el, wint_t c __attribute__((__unused__)))
747 {
748 	wchar_t *ptr;
749 	int nchars = c_hpos(el);
750 
751 	/*
752          * Move to the line requested
753          */
754 	if (*(ptr = el->el_line.cursor) == '\n')
755 		ptr--;
756 
757 	for (; ptr >= el->el_line.buffer; ptr--)
758 		if (*ptr == '\n' && --el->el_state.argument <= 0)
759 			break;
760 
761 	if (el->el_state.argument > 0)
762 		return CC_ERROR;
763 
764 	/*
765          * Move to the beginning of the line
766          */
767 	for (ptr--; ptr >= el->el_line.buffer && *ptr != '\n'; ptr--)
768 		continue;
769 
770 	/*
771          * Move to the character requested
772          */
773 	for (ptr++;
774 	    nchars-- > 0 && ptr < el->el_line.lastchar && *ptr != '\n';
775 	    ptr++)
776 		continue;
777 
778 	el->el_line.cursor = ptr;
779 	return CC_CURSOR;
780 }
781 
782 
783 /* ed_next_line():
784  *	Move down one line
785  *	Could be [j] [^n]
786  */
787 libedit_private el_action_t
788 /*ARGSUSED*/
789 ed_next_line(EditLine *el, wint_t c __attribute__((__unused__)))
790 {
791 	wchar_t *ptr;
792 	int nchars = c_hpos(el);
793 
794 	/*
795          * Move to the line requested
796          */
797 	for (ptr = el->el_line.cursor; ptr < el->el_line.lastchar; ptr++)
798 		if (*ptr == '\n' && --el->el_state.argument <= 0)
799 			break;
800 
801 	if (el->el_state.argument > 0)
802 		return CC_ERROR;
803 
804 	/*
805          * Move to the character requested
806          */
807 	for (ptr++;
808 	    nchars-- > 0 && ptr < el->el_line.lastchar && *ptr != '\n';
809 	    ptr++)
810 		continue;
811 
812 	el->el_line.cursor = ptr;
813 	return CC_CURSOR;
814 }
815 
816 
817 /* ed_command():
818  *	Editline extended command
819  *	[M-X] [:]
820  */
821 libedit_private el_action_t
822 /*ARGSUSED*/
823 ed_command(EditLine *el, wint_t c __attribute__((__unused__)))
824 {
825 	wchar_t tmpbuf[EL_BUFSIZ];
826 	int tmplen;
827 
828 	tmplen = c_gets(el, tmpbuf, L"\n: ");
829 	terminal__putc(el, '\n');
830 
831 	if (tmplen < 0 || (tmpbuf[tmplen] = 0, parse_line(el, tmpbuf)) == -1)
832 		terminal_beep(el);
833 
834 	el->el_map.current = el->el_map.key;
835 	re_clear_display(el);
836 	return CC_REFRESH;
837 }
838