d8e8b4fa73167425245437410a5e645c9e7b3e62
[dragonfly.git] / contrib / libedit / src / common.c
1 /*      $NetBSD: common.c,v 1.28 2011/07/29 20:58:07 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 1.28 2011/07/29 20:58:07 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*/
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
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*/
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*/
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                         if (el->el_line.cursor != el->el_line.buffer)
170                                 el->el_line.cursor--;
171                         else
172                                 return CC_ERROR;
173                 }
174         }
175         c_delafter(el, el->el_state.argument);  /* delete after dot */
176         if (el->el_line.cursor >= el->el_line.lastchar &&
177             el->el_line.cursor > el->el_line.buffer)
178                         /* bounds check */
179                 el->el_line.cursor = el->el_line.lastchar - 1;
180         return CC_REFRESH;
181 }
182
183
184 /* ed_kill_line():
185  *      Cut to the end of line
186  *      [^K] [^K]
187  */
188 protected el_action_t
189 /*ARGSUSED*/
190 ed_kill_line(EditLine *el, Int c __attribute__((__unused__)))
191 {
192         Char *kp, *cp;
193
194         cp = el->el_line.cursor;
195         kp = el->el_chared.c_kill.buf;
196         while (cp < el->el_line.lastchar)
197                 *kp++ = *cp++;  /* copy it */
198         el->el_chared.c_kill.last = kp;
199                         /* zap! -- delete to end */
200         el->el_line.lastchar = el->el_line.cursor;
201         return CC_REFRESH;
202 }
203
204
205 /* ed_move_to_end():
206  *      Move cursor to the end of line
207  *      [^E] [^E]
208  */
209 protected el_action_t
210 /*ARGSUSED*/
211 ed_move_to_end(EditLine *el, Int c __attribute__((__unused__)))
212 {
213
214         el->el_line.cursor = el->el_line.lastchar;
215         if (el->el_map.type == MAP_VI) {
216                 if (el->el_chared.c_vcmd.action != NOP) {
217                         cv_delfini(el);
218                         return CC_REFRESH;
219                 }
220 #ifdef VI_MOVE
221                 el->el_line.cursor--;
222 #endif
223         }
224         return CC_CURSOR;
225 }
226
227
228 /* ed_move_to_beg():
229  *      Move cursor to the beginning of line
230  *      [^A] [^A]
231  */
232 protected el_action_t
233 /*ARGSUSED*/
234 ed_move_to_beg(EditLine *el, Int c __attribute__((__unused__)))
235 {
236
237         el->el_line.cursor = el->el_line.buffer;
238
239         if (el->el_map.type == MAP_VI) {
240                         /* We want FIRST non space character */
241                 while (Isspace(*el->el_line.cursor))
242                         el->el_line.cursor++;
243                 if (el->el_chared.c_vcmd.action != NOP) {
244                         cv_delfini(el);
245                         return CC_REFRESH;
246                 }
247         }
248         return CC_CURSOR;
249 }
250
251
252 /* ed_transpose_chars():
253  *      Exchange the character to the left of the cursor with the one under it
254  *      [^T] [^T]
255  */
256 protected el_action_t
257 ed_transpose_chars(EditLine *el, Int c)
258 {
259
260         if (el->el_line.cursor < el->el_line.lastchar) {
261                 if (el->el_line.lastchar <= &el->el_line.buffer[1])
262                         return CC_ERROR;
263                 else
264                         el->el_line.cursor++;
265         }
266         if (el->el_line.cursor > &el->el_line.buffer[1]) {
267                 /* must have at least two chars entered */
268                 c = el->el_line.cursor[-2];
269                 el->el_line.cursor[-2] = el->el_line.cursor[-1];
270                 el->el_line.cursor[-1] = c;
271                 return CC_REFRESH;
272         } else
273                 return CC_ERROR;
274 }
275
276
277 /* ed_next_char():
278  *      Move to the right one character
279  *      [^F] [^F]
280  */
281 protected el_action_t
282 /*ARGSUSED*/
283 ed_next_char(EditLine *el, Int c __attribute__((__unused__)))
284 {
285         Char *lim = el->el_line.lastchar;
286
287         if (el->el_line.cursor >= lim ||
288             (el->el_line.cursor == lim - 1 &&
289             el->el_map.type == MAP_VI &&
290             el->el_chared.c_vcmd.action == NOP))
291                 return CC_ERROR;
292
293         el->el_line.cursor += el->el_state.argument;
294         if (el->el_line.cursor > lim)
295                 el->el_line.cursor = lim;
296
297         if (el->el_map.type == MAP_VI)
298                 if (el->el_chared.c_vcmd.action != NOP) {
299                         cv_delfini(el);
300                         return CC_REFRESH;
301                 }
302         return CC_CURSOR;
303 }
304
305
306 /* ed_prev_word():
307  *      Move to the beginning of the current word
308  *      [M-b] [b]
309  */
310 protected el_action_t
311 /*ARGSUSED*/
312 ed_prev_word(EditLine *el, Int c __attribute__((__unused__)))
313 {
314
315         if (el->el_line.cursor == el->el_line.buffer)
316                 return CC_ERROR;
317
318         el->el_line.cursor = c__prev_word(el->el_line.cursor,
319             el->el_line.buffer,
320             el->el_state.argument,
321             ce__isword);
322
323         if (el->el_map.type == MAP_VI)
324                 if (el->el_chared.c_vcmd.action != NOP) {
325                         cv_delfini(el);
326                         return CC_REFRESH;
327                 }
328         return CC_CURSOR;
329 }
330
331
332 /* ed_prev_char():
333  *      Move to the left one character
334  *      [^B] [^B]
335  */
336 protected el_action_t
337 /*ARGSUSED*/
338 ed_prev_char(EditLine *el, Int c __attribute__((__unused__)))
339 {
340
341         if (el->el_line.cursor > el->el_line.buffer) {
342                 el->el_line.cursor -= el->el_state.argument;
343                 if (el->el_line.cursor < el->el_line.buffer)
344                         el->el_line.cursor = el->el_line.buffer;
345
346                 if (el->el_map.type == MAP_VI)
347                         if (el->el_chared.c_vcmd.action != NOP) {
348                                 cv_delfini(el);
349                                 return CC_REFRESH;
350                         }
351                 return CC_CURSOR;
352         } else
353                 return CC_ERROR;
354 }
355
356
357 /* ed_quoted_insert():
358  *      Add the next character typed verbatim
359  *      [^V] [^V]
360  */
361 protected el_action_t
362 ed_quoted_insert(EditLine *el, Int c)
363 {
364         int num;
365         Char tc;
366
367         tty_quotemode(el);
368         num = FUN(el,getc)(el, &tc);
369         c = tc;
370         tty_noquotemode(el);
371         if (num == 1)
372                 return ed_insert(el, c);
373         else
374                 return ed_end_of_file(el, 0);
375 }
376
377
378 /* ed_digit():
379  *      Adds to argument or enters a digit
380  */
381 protected el_action_t
382 ed_digit(EditLine *el, Int c)
383 {
384
385         if (!Isdigit(c))
386                 return CC_ERROR;
387
388         if (el->el_state.doingarg) {
389                         /* if doing an arg, add this in... */
390                 if (el->el_state.lastcmd == EM_UNIVERSAL_ARGUMENT)
391                         el->el_state.argument = c - '0';
392                 else {
393                         if (el->el_state.argument > 1000000)
394                                 return CC_ERROR;
395                         el->el_state.argument =
396                             (el->el_state.argument * 10) + (c - '0');
397                 }
398                 return CC_ARGHACK;
399         }
400
401         return ed_insert(el, c);
402 }
403
404
405 /* ed_argument_digit():
406  *      Digit that starts argument
407  *      For ESC-n
408  */
409 protected el_action_t
410 ed_argument_digit(EditLine *el, Int c)
411 {
412
413         if (!Isdigit(c))
414                 return CC_ERROR;
415
416         if (el->el_state.doingarg) {
417                 if (el->el_state.argument > 1000000)
418                         return CC_ERROR;
419                 el->el_state.argument = (el->el_state.argument * 10) +
420                     (c - '0');
421         } else {                /* else starting an argument */
422                 el->el_state.argument = c - '0';
423                 el->el_state.doingarg = 1;
424         }
425         return CC_ARGHACK;
426 }
427
428
429 /* ed_unassigned():
430  *      Indicates unbound character
431  *      Bound to keys that are not assigned
432  */
433 protected el_action_t
434 /*ARGSUSED*/
435 ed_unassigned(EditLine *el __attribute__((__unused__)),
436     Int c __attribute__((__unused__)))
437 {
438
439         return CC_ERROR;
440 }
441
442
443 /**
444  ** TTY key handling.
445  **/
446
447 /* ed_tty_sigint():
448  *      Tty interrupt character
449  *      [^C]
450  */
451 protected el_action_t
452 /*ARGSUSED*/
453 ed_tty_sigint(EditLine *el __attribute__((__unused__)), 
454               Int c __attribute__((__unused__)))
455 {
456
457         return CC_NORM;
458 }
459
460
461 /* ed_tty_dsusp():
462  *      Tty delayed suspend character
463  *      [^Y]
464  */
465 protected el_action_t
466 /*ARGSUSED*/
467 ed_tty_dsusp(EditLine *el __attribute__((__unused__)), 
468              Int c __attribute__((__unused__)))
469 {
470
471         return CC_NORM;
472 }
473
474
475 /* ed_tty_flush_output():
476  *      Tty flush output characters
477  *      [^O]
478  */
479 protected el_action_t
480 /*ARGSUSED*/
481 ed_tty_flush_output(EditLine *el __attribute__((__unused__)), 
482                     Int c __attribute__((__unused__)))
483 {
484
485         return CC_NORM;
486 }
487
488
489 /* ed_tty_sigquit():
490  *      Tty quit character
491  *      [^\]
492  */
493 protected el_action_t
494 /*ARGSUSED*/
495 ed_tty_sigquit(EditLine *el __attribute__((__unused__)), 
496                Int c __attribute__((__unused__)))
497 {
498
499         return CC_NORM;
500 }
501
502
503 /* ed_tty_sigtstp():
504  *      Tty suspend character
505  *      [^Z]
506  */
507 protected el_action_t
508 /*ARGSUSED*/
509 ed_tty_sigtstp(EditLine *el __attribute__((__unused__)), 
510                Int c __attribute__((__unused__)))
511 {
512
513         return CC_NORM;
514 }
515
516
517 /* ed_tty_stop_output():
518  *      Tty disallow output characters
519  *      [^S]
520  */
521 protected el_action_t
522 /*ARGSUSED*/
523 ed_tty_stop_output(EditLine *el __attribute__((__unused__)), 
524                    Int c __attribute__((__unused__)))
525 {
526
527         return CC_NORM;
528 }
529
530
531 /* ed_tty_start_output():
532  *      Tty allow output characters
533  *      [^Q]
534  */
535 protected el_action_t
536 /*ARGSUSED*/
537 ed_tty_start_output(EditLine *el __attribute__((__unused__)), 
538                     Int c __attribute__((__unused__)))
539 {
540
541         return CC_NORM;
542 }
543
544
545 /* ed_newline():
546  *      Execute command
547  *      [^J]
548  */
549 protected el_action_t
550 /*ARGSUSED*/
551 ed_newline(EditLine *el, Int c __attribute__((__unused__)))
552 {
553
554         re_goto_bottom(el);
555         *el->el_line.lastchar++ = '\n';
556         *el->el_line.lastchar = '\0';
557         return CC_NEWLINE;
558 }
559
560
561 /* ed_delete_prev_char():
562  *      Delete the character to the left of the cursor
563  *      [^?]
564  */
565 protected el_action_t
566 /*ARGSUSED*/
567 ed_delete_prev_char(EditLine *el, Int c __attribute__((__unused__)))
568 {
569
570         if (el->el_line.cursor <= el->el_line.buffer)
571                 return CC_ERROR;
572
573         c_delbefore(el, el->el_state.argument);
574         el->el_line.cursor -= el->el_state.argument;
575         if (el->el_line.cursor < el->el_line.buffer)
576                 el->el_line.cursor = el->el_line.buffer;
577         return CC_REFRESH;
578 }
579
580
581 /* ed_clear_screen():
582  *      Clear screen leaving current line at the top
583  *      [^L]
584  */
585 protected el_action_t
586 /*ARGSUSED*/
587 ed_clear_screen(EditLine *el, Int c __attribute__((__unused__)))
588 {
589
590         terminal_clear_screen(el);      /* clear the whole real screen */
591         re_clear_display(el);   /* reset everything */
592         return CC_REFRESH;
593 }
594
595
596 /* ed_redisplay():
597  *      Redisplay everything
598  *      ^R
599  */
600 protected el_action_t
601 /*ARGSUSED*/
602 ed_redisplay(EditLine *el __attribute__((__unused__)), 
603              Int c __attribute__((__unused__)))
604 {
605
606         return CC_REDISPLAY;
607 }
608
609
610 /* ed_start_over():
611  *      Erase current line and start from scratch
612  *      [^G]
613  */
614 protected el_action_t
615 /*ARGSUSED*/
616 ed_start_over(EditLine *el, Int c __attribute__((__unused__)))
617 {
618
619         ch_reset(el, 0);
620         return CC_REFRESH;
621 }
622
623
624 /* ed_sequence_lead_in():
625  *      First character in a bound sequence
626  *      Placeholder for external keys
627  */
628 protected el_action_t
629 /*ARGSUSED*/
630 ed_sequence_lead_in(EditLine *el __attribute__((__unused__)), 
631                     Int c __attribute__((__unused__)))
632 {
633
634         return CC_NORM;
635 }
636
637
638 /* ed_prev_history():
639  *      Move to the previous history line
640  *      [^P] [k]
641  */
642 protected el_action_t
643 /*ARGSUSED*/
644 ed_prev_history(EditLine *el, Int c __attribute__((__unused__)))
645 {
646         char beep = 0;
647         int sv_event = el->el_history.eventno;
648
649         el->el_chared.c_undo.len = -1;
650         *el->el_line.lastchar = '\0';           /* just in case */
651
652         if (el->el_history.eventno == 0) {      /* save the current buffer
653                                                  * away */
654                 (void) Strncpy(el->el_history.buf, el->el_line.buffer,
655                     EL_BUFSIZ);
656                 el->el_history.last = el->el_history.buf +
657                     (el->el_line.lastchar - el->el_line.buffer);
658         }
659         el->el_history.eventno += el->el_state.argument;
660
661         if (hist_get(el) == CC_ERROR) {
662                 if (el->el_map.type == MAP_VI) {
663                         el->el_history.eventno = sv_event;
664                         
665                 }
666                 beep = 1;
667                 /* el->el_history.eventno was fixed by first call */
668                 (void) hist_get(el);
669         }
670         if (beep)
671                 return CC_REFRESH_BEEP;
672         return CC_REFRESH;
673 }
674
675
676 /* ed_next_history():
677  *      Move to the next history line
678  *      [^N] [j]
679  */
680 protected el_action_t
681 /*ARGSUSED*/
682 ed_next_history(EditLine *el, Int c __attribute__((__unused__)))
683 {
684         el_action_t beep = CC_REFRESH, rval;
685
686         el->el_chared.c_undo.len = -1;
687         *el->el_line.lastchar = '\0';   /* just in case */
688
689         el->el_history.eventno -= el->el_state.argument;
690
691         if (el->el_history.eventno < 0) {
692                 el->el_history.eventno = 0;
693                 beep = CC_REFRESH_BEEP;
694         }
695         rval = hist_get(el);
696         if (rval == CC_REFRESH)
697                 return beep;
698         return rval;
699
700 }
701
702
703 /* ed_search_prev_history():
704  *      Search previous in history for a line matching the current
705  *      next search history [M-P] [K]
706  */
707 protected el_action_t
708 /*ARGSUSED*/
709 ed_search_prev_history(EditLine *el, Int c __attribute__((__unused__)))
710 {
711         const Char *hp;
712         int h;
713         bool_t found = 0;
714
715         el->el_chared.c_vcmd.action = NOP;
716         el->el_chared.c_undo.len = -1;
717         *el->el_line.lastchar = '\0';   /* just in case */
718         if (el->el_history.eventno < 0) {
719 #ifdef DEBUG_EDIT
720                 (void) fprintf(el->el_errfile,
721                     "e_prev_search_hist(): eventno < 0;\n");
722 #endif
723                 el->el_history.eventno = 0;
724                 return CC_ERROR;
725         }
726         if (el->el_history.eventno == 0) {
727                 (void) Strncpy(el->el_history.buf, el->el_line.buffer,
728                     EL_BUFSIZ);
729                 el->el_history.last = el->el_history.buf +
730                     (el->el_line.lastchar - el->el_line.buffer);
731         }
732         if (el->el_history.ref == NULL)
733                 return CC_ERROR;
734
735         hp = HIST_FIRST(el);
736         if (hp == NULL)
737                 return CC_ERROR;
738
739         c_setpat(el);           /* Set search pattern !! */
740
741         for (h = 1; h <= el->el_history.eventno; h++)
742                 hp = HIST_NEXT(el);
743
744         while (hp != NULL) {
745 #ifdef SDEBUG
746                 (void) fprintf(el->el_errfile, "Comparing with \"%s\"\n", hp);
747 #endif
748                 if ((Strncmp(hp, el->el_line.buffer, (size_t)
749                             (el->el_line.lastchar - el->el_line.buffer)) ||
750                         hp[el->el_line.lastchar - el->el_line.buffer]) &&
751                     c_hmatch(el, hp)) {
752                         found++;
753                         break;
754                 }
755                 h++;
756                 hp = HIST_NEXT(el);
757         }
758
759         if (!found) {
760 #ifdef SDEBUG
761                 (void) fprintf(el->el_errfile, "not found\n");
762 #endif
763                 return CC_ERROR;
764         }
765         el->el_history.eventno = h;
766
767         return hist_get(el);
768 }
769
770
771 /* ed_search_next_history():
772  *      Search next in history for a line matching the current
773  *      [M-N] [J]
774  */
775 protected el_action_t
776 /*ARGSUSED*/
777 ed_search_next_history(EditLine *el, Int c __attribute__((__unused__)))
778 {
779         const Char *hp;
780         int h;
781         bool_t found = 0;
782
783         el->el_chared.c_vcmd.action = NOP;
784         el->el_chared.c_undo.len = -1;
785         *el->el_line.lastchar = '\0';   /* just in case */
786
787         if (el->el_history.eventno == 0)
788                 return CC_ERROR;
789
790         if (el->el_history.ref == NULL)
791                 return CC_ERROR;
792
793         hp = HIST_FIRST(el);
794         if (hp == NULL)
795                 return CC_ERROR;
796
797         c_setpat(el);           /* Set search pattern !! */
798
799         for (h = 1; h < el->el_history.eventno && hp; h++) {
800 #ifdef SDEBUG
801                 (void) fprintf(el->el_errfile, "Comparing with \"%s\"\n", hp);
802 #endif
803                 if ((Strncmp(hp, el->el_line.buffer, (size_t)
804                             (el->el_line.lastchar - el->el_line.buffer)) ||
805                         hp[el->el_line.lastchar - el->el_line.buffer]) &&
806                     c_hmatch(el, hp))
807                         found = h;
808                 hp = HIST_NEXT(el);
809         }
810
811         if (!found) {           /* is it the current history number? */
812                 if (!c_hmatch(el, el->el_history.buf)) {
813 #ifdef SDEBUG
814                         (void) fprintf(el->el_errfile, "not found\n");
815 #endif
816                         return CC_ERROR;
817                 }
818         }
819         el->el_history.eventno = found;
820
821         return hist_get(el);
822 }
823
824
825 /* ed_prev_line():
826  *      Move up one line
827  *      Could be [k] [^p]
828  */
829 protected el_action_t
830 /*ARGSUSED*/
831 ed_prev_line(EditLine *el, Int c __attribute__((__unused__)))
832 {
833         Char *ptr;
834         int nchars = c_hpos(el);
835
836         /*
837          * Move to the line requested
838          */
839         if (*(ptr = el->el_line.cursor) == '\n')
840                 ptr--;
841
842         for (; ptr >= el->el_line.buffer; ptr--)
843                 if (*ptr == '\n' && --el->el_state.argument <= 0)
844                         break;
845
846         if (el->el_state.argument > 0)
847                 return CC_ERROR;
848
849         /*
850          * Move to the beginning of the line
851          */
852         for (ptr--; ptr >= el->el_line.buffer && *ptr != '\n'; ptr--)
853                 continue;
854
855         /*
856          * Move to the character requested
857          */
858         for (ptr++;
859             nchars-- > 0 && ptr < el->el_line.lastchar && *ptr != '\n';
860             ptr++)
861                 continue;
862
863         el->el_line.cursor = ptr;
864         return CC_CURSOR;
865 }
866
867
868 /* ed_next_line():
869  *      Move down one line
870  *      Could be [j] [^n]
871  */
872 protected el_action_t
873 /*ARGSUSED*/
874 ed_next_line(EditLine *el, Int c __attribute__((__unused__)))
875 {
876         Char *ptr;
877         int nchars = c_hpos(el);
878
879         /*
880          * Move to the line requested
881          */
882         for (ptr = el->el_line.cursor; ptr < el->el_line.lastchar; ptr++)
883                 if (*ptr == '\n' && --el->el_state.argument <= 0)
884                         break;
885
886         if (el->el_state.argument > 0)
887                 return CC_ERROR;
888
889         /*
890          * Move to the character requested
891          */
892         for (ptr++;
893             nchars-- > 0 && ptr < el->el_line.lastchar && *ptr != '\n';
894             ptr++)
895                 continue;
896
897         el->el_line.cursor = ptr;
898         return CC_CURSOR;
899 }
900
901
902 /* ed_command():
903  *      Editline extended command
904  *      [M-X] [:]
905  */
906 protected el_action_t
907 /*ARGSUSED*/
908 ed_command(EditLine *el, Int c __attribute__((__unused__)))
909 {
910         Char tmpbuf[EL_BUFSIZ];
911         int tmplen;
912
913         tmplen = c_gets(el, tmpbuf, STR("\n: "));
914         terminal__putc(el, '\n');
915
916         if (tmplen < 0 || (tmpbuf[tmplen] = 0, parse_line(el, tmpbuf)) == -1)
917                 terminal_beep(el);
918
919         el->el_map.current = el->el_map.key;
920         re_clear_display(el);
921         return CC_REFRESH;
922 }