1 /* $NetBSD: chared.c,v 1.49 2016/02/24 14:29:21 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[] = "@(#)chared.c 8.1 (Berkeley) 6/4/93";
39 #else
40 __RCSID("$NetBSD: chared.c,v 1.49 2016/02/24 14:29:21 christos Exp $");
41 #endif
42 #endif /* not lint && not SCCSID */
43 #include <sys/cdefs.h>
44 __FBSDID("$FreeBSD$");
45
46 /*
47 * chared.c: Character editor utilities
48 */
49 #include <ctype.h>
50 #include <stdlib.h>
51 #include <string.h>
52
53 #include "el.h"
54 #include "common.h"
55
56 private void ch__clearmacro (EditLine *);
57
58 /* value to leave unused in line buffer */
59 #define EL_LEAVE 2
60
61 /* cv_undo():
62 * Handle state for the vi undo command
63 */
64 protected void
cv_undo(EditLine * el)65 cv_undo(EditLine *el)
66 {
67 c_undo_t *vu = &el->el_chared.c_undo;
68 c_redo_t *r = &el->el_chared.c_redo;
69 size_t size;
70
71 /* Save entire line for undo */
72 size = (size_t)(el->el_line.lastchar - el->el_line.buffer);
73 vu->len = (ssize_t)size;
74 vu->cursor = (int)(el->el_line.cursor - el->el_line.buffer);
75 (void)memcpy(vu->buf, el->el_line.buffer, size * sizeof(*vu->buf));
76
77 /* save command info for redo */
78 r->count = el->el_state.doingarg ? el->el_state.argument : 0;
79 r->action = el->el_chared.c_vcmd.action;
80 r->pos = r->buf;
81 r->cmd = el->el_state.thiscmd;
82 r->ch = el->el_state.thisch;
83 }
84
85 /* cv_yank():
86 * Save yank/delete data for paste
87 */
88 protected void
cv_yank(EditLine * el,const Char * ptr,int size)89 cv_yank(EditLine *el, const Char *ptr, int size)
90 {
91 c_kill_t *k = &el->el_chared.c_kill;
92
93 (void)memcpy(k->buf, ptr, (size_t)size * sizeof(*k->buf));
94 k->last = k->buf + size;
95 }
96
97
98 /* c_insert():
99 * Insert num characters
100 */
101 protected void
c_insert(EditLine * el,int num)102 c_insert(EditLine *el, int num)
103 {
104 Char *cp;
105
106 if (el->el_line.lastchar + num >= el->el_line.limit) {
107 if (!ch_enlargebufs(el, (size_t)num))
108 return; /* can't go past end of buffer */
109 }
110
111 if (el->el_line.cursor < el->el_line.lastchar) {
112 /* if I must move chars */
113 for (cp = el->el_line.lastchar; cp >= el->el_line.cursor; cp--)
114 cp[num] = *cp;
115 }
116 el->el_line.lastchar += num;
117 }
118
119
120 /* c_delafter():
121 * Delete num characters after the cursor
122 */
123 protected void
c_delafter(EditLine * el,int num)124 c_delafter(EditLine *el, int num)
125 {
126
127 if (el->el_line.cursor + num > el->el_line.lastchar)
128 num = (int)(el->el_line.lastchar - el->el_line.cursor);
129
130 if (el->el_map.current != el->el_map.emacs) {
131 cv_undo(el);
132 cv_yank(el, el->el_line.cursor, num);
133 }
134
135 if (num > 0) {
136 Char *cp;
137
138 for (cp = el->el_line.cursor; cp <= el->el_line.lastchar; cp++)
139 *cp = cp[num];
140
141 el->el_line.lastchar -= num;
142 }
143 }
144
145
146 /* c_delafter1():
147 * Delete the character after the cursor, do not yank
148 */
149 protected void
c_delafter1(EditLine * el)150 c_delafter1(EditLine *el)
151 {
152 Char *cp;
153
154 for (cp = el->el_line.cursor; cp <= el->el_line.lastchar; cp++)
155 *cp = cp[1];
156
157 el->el_line.lastchar--;
158 }
159
160
161 /* c_delbefore():
162 * Delete num characters before the cursor
163 */
164 protected void
c_delbefore(EditLine * el,int num)165 c_delbefore(EditLine *el, int num)
166 {
167
168 if (el->el_line.cursor - num < el->el_line.buffer)
169 num = (int)(el->el_line.cursor - el->el_line.buffer);
170
171 if (el->el_map.current != el->el_map.emacs) {
172 cv_undo(el);
173 cv_yank(el, el->el_line.cursor - num, num);
174 }
175
176 if (num > 0) {
177 Char *cp;
178
179 for (cp = el->el_line.cursor - num;
180 cp <= el->el_line.lastchar;
181 cp++)
182 *cp = cp[num];
183
184 el->el_line.lastchar -= num;
185 }
186 }
187
188
189 /* c_delbefore1():
190 * Delete the character before the cursor, do not yank
191 */
192 protected void
c_delbefore1(EditLine * el)193 c_delbefore1(EditLine *el)
194 {
195 Char *cp;
196
197 for (cp = el->el_line.cursor - 1; cp <= el->el_line.lastchar; cp++)
198 *cp = cp[1];
199
200 el->el_line.lastchar--;
201 }
202
203
204 /* ce__isword():
205 * Return if p is part of a word according to emacs
206 */
207 protected int
ce__isword(wint_t p)208 ce__isword(wint_t p)
209 {
210 return Isalnum(p) || Strchr(STR("*?_-.[]~="), p) != NULL;
211 }
212
213
214 /* cv__isword():
215 * Return if p is part of a word according to vi
216 */
217 protected int
cv__isword(wint_t p)218 cv__isword(wint_t p)
219 {
220 if (Isalnum(p) || p == '_')
221 return 1;
222 if (Isgraph(p))
223 return 2;
224 return 0;
225 }
226
227
228 /* cv__isWord():
229 * Return if p is part of a big word according to vi
230 */
231 protected int
cv__isWord(wint_t p)232 cv__isWord(wint_t p)
233 {
234 return !Isspace(p);
235 }
236
237
238 /* c__prev_word():
239 * Find the previous word
240 */
241 protected Char *
c__prev_word(Char * p,Char * low,int n,int (* wtest)(wint_t))242 c__prev_word(Char *p, Char *low, int n, int (*wtest)(wint_t))
243 {
244 p--;
245
246 while (n--) {
247 while ((p >= low) && !(*wtest)(*p))
248 p--;
249 while ((p >= low) && (*wtest)(*p))
250 p--;
251 }
252
253 /* cp now points to one character before the word */
254 p++;
255 if (p < low)
256 p = low;
257 /* cp now points where we want it */
258 return p;
259 }
260
261
262 /* c__next_word():
263 * Find the next word
264 */
265 protected Char *
c__next_word(Char * p,Char * high,int n,int (* wtest)(wint_t))266 c__next_word(Char *p, Char *high, int n, int (*wtest)(wint_t))
267 {
268 while (n--) {
269 while ((p < high) && !(*wtest)(*p))
270 p++;
271 while ((p < high) && (*wtest)(*p))
272 p++;
273 }
274 if (p > high)
275 p = high;
276 /* p now points where we want it */
277 return p;
278 }
279
280 /* cv_next_word():
281 * Find the next word vi style
282 */
283 protected Char *
cv_next_word(EditLine * el,Char * p,Char * high,int n,int (* wtest)(wint_t))284 cv_next_word(EditLine *el, Char *p, Char *high, int n, int (*wtest)(wint_t))
285 {
286 int test;
287
288 while (n--) {
289 test = (*wtest)(*p);
290 while ((p < high) && (*wtest)(*p) == test)
291 p++;
292 /*
293 * vi historically deletes with cw only the word preserving the
294 * trailing whitespace! This is not what 'w' does..
295 */
296 if (n || el->el_chared.c_vcmd.action != (DELETE|INSERT))
297 while ((p < high) && Isspace(*p))
298 p++;
299 }
300
301 /* p now points where we want it */
302 if (p > high)
303 return high;
304 else
305 return p;
306 }
307
308
309 /* cv_prev_word():
310 * Find the previous word vi style
311 */
312 protected Char *
cv_prev_word(Char * p,Char * low,int n,int (* wtest)(wint_t))313 cv_prev_word(Char *p, Char *low, int n, int (*wtest)(wint_t))
314 {
315 int test;
316
317 p--;
318 while (n--) {
319 while ((p > low) && Isspace(*p))
320 p--;
321 test = (*wtest)(*p);
322 while ((p >= low) && (*wtest)(*p) == test)
323 p--;
324 }
325 p++;
326
327 /* p now points where we want it */
328 if (p < low)
329 return low;
330 else
331 return p;
332 }
333
334
335 /* cv_delfini():
336 * Finish vi delete action
337 */
338 protected void
cv_delfini(EditLine * el)339 cv_delfini(EditLine *el)
340 {
341 int size;
342 int action = el->el_chared.c_vcmd.action;
343
344 if (action & INSERT)
345 el->el_map.current = el->el_map.key;
346
347 if (el->el_chared.c_vcmd.pos == 0)
348 /* sanity */
349 return;
350
351 size = (int)(el->el_line.cursor - el->el_chared.c_vcmd.pos);
352 if (size == 0)
353 size = 1;
354 el->el_line.cursor = el->el_chared.c_vcmd.pos;
355 if (action & YANK) {
356 if (size > 0)
357 cv_yank(el, el->el_line.cursor, size);
358 else
359 cv_yank(el, el->el_line.cursor + size, -size);
360 } else {
361 if (size > 0) {
362 c_delafter(el, size);
363 re_refresh_cursor(el);
364 } else {
365 c_delbefore(el, -size);
366 el->el_line.cursor += size;
367 }
368 }
369 el->el_chared.c_vcmd.action = NOP;
370 }
371
372
373 /* cv__endword():
374 * Go to the end of this word according to vi
375 */
376 protected Char *
cv__endword(Char * p,Char * high,int n,int (* wtest)(wint_t))377 cv__endword(Char *p, Char *high, int n, int (*wtest)(wint_t))
378 {
379 int test;
380
381 p++;
382
383 while (n--) {
384 while ((p < high) && Isspace(*p))
385 p++;
386
387 test = (*wtest)(*p);
388 while ((p < high) && (*wtest)(*p) == test)
389 p++;
390 }
391 p--;
392 return p;
393 }
394
395 /* ch_init():
396 * Initialize the character editor
397 */
398 protected int
ch_init(EditLine * el)399 ch_init(EditLine *el)
400 {
401 c_macro_t *ma = &el->el_chared.c_macro;
402
403 el->el_line.buffer = el_malloc(EL_BUFSIZ *
404 sizeof(*el->el_line.buffer));
405 if (el->el_line.buffer == NULL)
406 return -1;
407
408 (void) memset(el->el_line.buffer, 0, EL_BUFSIZ *
409 sizeof(*el->el_line.buffer));
410 el->el_line.cursor = el->el_line.buffer;
411 el->el_line.lastchar = el->el_line.buffer;
412 el->el_line.limit = &el->el_line.buffer[EL_BUFSIZ - EL_LEAVE];
413
414 el->el_chared.c_undo.buf = el_malloc(EL_BUFSIZ *
415 sizeof(*el->el_chared.c_undo.buf));
416 if (el->el_chared.c_undo.buf == NULL)
417 return -1;
418 (void) memset(el->el_chared.c_undo.buf, 0, EL_BUFSIZ *
419 sizeof(*el->el_chared.c_undo.buf));
420 el->el_chared.c_undo.len = -1;
421 el->el_chared.c_undo.cursor = 0;
422 el->el_chared.c_redo.buf = el_malloc(EL_BUFSIZ *
423 sizeof(*el->el_chared.c_redo.buf));
424 if (el->el_chared.c_redo.buf == NULL)
425 return -1;
426 el->el_chared.c_redo.pos = el->el_chared.c_redo.buf;
427 el->el_chared.c_redo.lim = el->el_chared.c_redo.buf + EL_BUFSIZ;
428 el->el_chared.c_redo.cmd = ED_UNASSIGNED;
429
430 el->el_chared.c_vcmd.action = NOP;
431 el->el_chared.c_vcmd.pos = el->el_line.buffer;
432
433 el->el_chared.c_kill.buf = el_malloc(EL_BUFSIZ *
434 sizeof(*el->el_chared.c_kill.buf));
435 if (el->el_chared.c_kill.buf == NULL)
436 return -1;
437 (void) memset(el->el_chared.c_kill.buf, 0, EL_BUFSIZ *
438 sizeof(*el->el_chared.c_kill.buf));
439 el->el_chared.c_kill.mark = el->el_line.buffer;
440 el->el_chared.c_kill.last = el->el_chared.c_kill.buf;
441 el->el_chared.c_resizefun = NULL;
442 el->el_chared.c_resizearg = NULL;
443 el->el_chared.c_aliasfun = NULL;
444 el->el_chared.c_aliasarg = NULL;
445
446 el->el_map.current = el->el_map.key;
447
448 el->el_state.inputmode = MODE_INSERT; /* XXX: save a default */
449 el->el_state.doingarg = 0;
450 el->el_state.metanext = 0;
451 el->el_state.argument = 1;
452 el->el_state.lastcmd = ED_UNASSIGNED;
453
454 ma->level = -1;
455 ma->offset = 0;
456 ma->macro = el_malloc(EL_MAXMACRO * sizeof(*ma->macro));
457 if (ma->macro == NULL)
458 return -1;
459 return 0;
460 }
461
462 /* ch_reset():
463 * Reset the character editor
464 */
465 protected void
ch_reset(EditLine * el,int mclear)466 ch_reset(EditLine *el, int mclear)
467 {
468 el->el_line.cursor = el->el_line.buffer;
469 el->el_line.lastchar = el->el_line.buffer;
470
471 el->el_chared.c_undo.len = -1;
472 el->el_chared.c_undo.cursor = 0;
473
474 el->el_chared.c_vcmd.action = NOP;
475 el->el_chared.c_vcmd.pos = el->el_line.buffer;
476
477 el->el_chared.c_kill.mark = el->el_line.buffer;
478
479 el->el_map.current = el->el_map.key;
480
481 el->el_state.inputmode = MODE_INSERT; /* XXX: save a default */
482 el->el_state.doingarg = 0;
483 el->el_state.metanext = 0;
484 el->el_state.argument = 1;
485 el->el_state.lastcmd = ED_UNASSIGNED;
486
487 el->el_history.eventno = 0;
488
489 if (mclear)
490 ch__clearmacro(el);
491 }
492
493 private void
ch__clearmacro(EditLine * el)494 ch__clearmacro(EditLine *el)
495 {
496 c_macro_t *ma = &el->el_chared.c_macro;
497 while (ma->level >= 0)
498 el_free(ma->macro[ma->level--]);
499 }
500
501 /* ch_enlargebufs():
502 * Enlarge line buffer to be able to hold twice as much characters.
503 * Returns 1 if successful, 0 if not.
504 */
505 protected int
ch_enlargebufs(EditLine * el,size_t addlen)506 ch_enlargebufs(EditLine *el, size_t addlen)
507 {
508 size_t sz, newsz;
509 Char *newbuffer, *oldbuf, *oldkbuf;
510
511 sz = (size_t)(el->el_line.limit - el->el_line.buffer + EL_LEAVE);
512 newsz = sz * 2;
513 /*
514 * If newly required length is longer than current buffer, we need
515 * to make the buffer big enough to hold both old and new stuff.
516 */
517 if (addlen > sz) {
518 while(newsz - sz < addlen)
519 newsz *= 2;
520 }
521
522 /*
523 * Reallocate line buffer.
524 */
525 newbuffer = el_realloc(el->el_line.buffer, newsz * sizeof(*newbuffer));
526 if (!newbuffer)
527 return 0;
528
529 /* zero the newly added memory, leave old data in */
530 (void) memset(&newbuffer[sz], 0, (newsz - sz) * sizeof(*newbuffer));
531
532 oldbuf = el->el_line.buffer;
533
534 el->el_line.buffer = newbuffer;
535 el->el_line.cursor = newbuffer + (el->el_line.cursor - oldbuf);
536 el->el_line.lastchar = newbuffer + (el->el_line.lastchar - oldbuf);
537 /* don't set new size until all buffers are enlarged */
538 el->el_line.limit = &newbuffer[sz - EL_LEAVE];
539
540 /*
541 * Reallocate kill buffer.
542 */
543 newbuffer = el_realloc(el->el_chared.c_kill.buf, newsz *
544 sizeof(*newbuffer));
545 if (!newbuffer)
546 return 0;
547
548 /* zero the newly added memory, leave old data in */
549 (void) memset(&newbuffer[sz], 0, (newsz - sz) * sizeof(*newbuffer));
550
551 oldkbuf = el->el_chared.c_kill.buf;
552
553 el->el_chared.c_kill.buf = newbuffer;
554 el->el_chared.c_kill.last = newbuffer +
555 (el->el_chared.c_kill.last - oldkbuf);
556 el->el_chared.c_kill.mark = el->el_line.buffer +
557 (el->el_chared.c_kill.mark - oldbuf);
558
559 /*
560 * Reallocate undo buffer.
561 */
562 newbuffer = el_realloc(el->el_chared.c_undo.buf,
563 newsz * sizeof(*newbuffer));
564 if (!newbuffer)
565 return 0;
566
567 /* zero the newly added memory, leave old data in */
568 (void) memset(&newbuffer[sz], 0, (newsz - sz) * sizeof(*newbuffer));
569 el->el_chared.c_undo.buf = newbuffer;
570
571 newbuffer = el_realloc(el->el_chared.c_redo.buf,
572 newsz * sizeof(*newbuffer));
573 if (!newbuffer)
574 return 0;
575 el->el_chared.c_redo.pos = newbuffer +
576 (el->el_chared.c_redo.pos - el->el_chared.c_redo.buf);
577 el->el_chared.c_redo.lim = newbuffer +
578 (el->el_chared.c_redo.lim - el->el_chared.c_redo.buf);
579 el->el_chared.c_redo.buf = newbuffer;
580
581 if (!hist_enlargebuf(el, sz, newsz))
582 return 0;
583
584 /* Safe to set enlarged buffer size */
585 el->el_line.limit = &el->el_line.buffer[newsz - EL_LEAVE];
586 if (el->el_chared.c_resizefun)
587 (*el->el_chared.c_resizefun)(el, el->el_chared.c_resizearg);
588 return 1;
589 }
590
591 /* ch_end():
592 * Free the data structures used by the editor
593 */
594 protected void
ch_end(EditLine * el)595 ch_end(EditLine *el)
596 {
597 el_free(el->el_line.buffer);
598 el->el_line.buffer = NULL;
599 el->el_line.limit = NULL;
600 el_free(el->el_chared.c_undo.buf);
601 el->el_chared.c_undo.buf = NULL;
602 el_free(el->el_chared.c_redo.buf);
603 el->el_chared.c_redo.buf = NULL;
604 el->el_chared.c_redo.pos = NULL;
605 el->el_chared.c_redo.lim = NULL;
606 el->el_chared.c_redo.cmd = ED_UNASSIGNED;
607 el_free(el->el_chared.c_kill.buf);
608 el->el_chared.c_kill.buf = NULL;
609 ch_reset(el, 1);
610 el_free(el->el_chared.c_macro.macro);
611 el->el_chared.c_macro.macro = NULL;
612 }
613
614
615 /* el_insertstr():
616 * Insert string at cursorI
617 */
618 public int
FUN(el,insertstr)619 FUN(el,insertstr)(EditLine *el, const Char *s)
620 {
621 size_t len;
622
623 if (s == NULL || (len = Strlen(s)) == 0)
624 return -1;
625 if (el->el_line.lastchar + len >= el->el_line.limit) {
626 if (!ch_enlargebufs(el, len))
627 return -1;
628 }
629
630 c_insert(el, (int)len);
631 while (*s)
632 *el->el_line.cursor++ = *s++;
633 return 0;
634 }
635
636
637 /* el_deletestr():
638 * Delete num characters before the cursor
639 */
640 public void
el_deletestr(EditLine * el,int n)641 el_deletestr(EditLine *el, int n)
642 {
643 if (n <= 0)
644 return;
645
646 if (el->el_line.cursor < &el->el_line.buffer[n])
647 return;
648
649 c_delbefore(el, n); /* delete before dot */
650 el->el_line.cursor -= n;
651 if (el->el_line.cursor < el->el_line.buffer)
652 el->el_line.cursor = el->el_line.buffer;
653 }
654
655 /* el_cursor():
656 * Move the cursor to the left or the right of the current position
657 */
658 public int
el_cursor(EditLine * el,int n)659 el_cursor(EditLine *el, int n)
660 {
661 if (n == 0)
662 goto out;
663
664 el->el_line.cursor += n;
665
666 if (el->el_line.cursor < el->el_line.buffer)
667 el->el_line.cursor = el->el_line.buffer;
668 if (el->el_line.cursor > el->el_line.lastchar)
669 el->el_line.cursor = el->el_line.lastchar;
670 out:
671 return (int)(el->el_line.cursor - el->el_line.buffer);
672 }
673
674 /* c_gets():
675 * Get a string
676 */
677 protected int
c_gets(EditLine * el,Char * buf,const Char * prompt)678 c_gets(EditLine *el, Char *buf, const Char *prompt)
679 {
680 wchar_t wch;
681 ssize_t len;
682 Char *cp = el->el_line.buffer, ch;
683
684 if (prompt) {
685 len = (ssize_t)Strlen(prompt);
686 (void)memcpy(cp, prompt, (size_t)len * sizeof(*cp));
687 cp += len;
688 }
689 len = 0;
690
691 for (;;) {
692 el->el_line.cursor = cp;
693 *cp = ' ';
694 el->el_line.lastchar = cp + 1;
695 re_refresh(el);
696
697 if (el_wgetc(el, &wch) != 1) {
698 ed_end_of_file(el, 0);
699 len = -1;
700 break;
701 }
702 ch = (Char)wch;
703
704 switch (ch) {
705
706 case L'\b': /* Delete and backspace */
707 case 0177:
708 if (len == 0) {
709 len = -1;
710 break;
711 }
712 len--;
713 cp--;
714 continue;
715
716 case 0033: /* ESC */
717 case L'\r': /* Newline */
718 case L'\n':
719 buf[len] = ch;
720 break;
721
722 default:
723 if (len >= (ssize_t)(EL_BUFSIZ - 16))
724 terminal_beep(el);
725 else {
726 buf[len++] = ch;
727 *cp++ = ch;
728 }
729 continue;
730 }
731 break;
732 }
733
734 el->el_line.buffer[0] = '\0';
735 el->el_line.lastchar = el->el_line.buffer;
736 el->el_line.cursor = el->el_line.buffer;
737 return (int)len;
738 }
739
740
741 /* c_hpos():
742 * Return the current horizontal position of the cursor
743 */
744 protected int
c_hpos(EditLine * el)745 c_hpos(EditLine *el)
746 {
747 Char *ptr;
748
749 /*
750 * Find how many characters till the beginning of this line.
751 */
752 if (el->el_line.cursor == el->el_line.buffer)
753 return 0;
754 else {
755 for (ptr = el->el_line.cursor - 1;
756 ptr >= el->el_line.buffer && *ptr != '\n';
757 ptr--)
758 continue;
759 return (int)(el->el_line.cursor - ptr - 1);
760 }
761 }
762
763 protected int
ch_resizefun(EditLine * el,el_zfunc_t f,void * a)764 ch_resizefun(EditLine *el, el_zfunc_t f, void *a)
765 {
766 el->el_chared.c_resizefun = f;
767 el->el_chared.c_resizearg = a;
768 return 0;
769 }
770
771 protected int
ch_aliasfun(EditLine * el,el_afunc_t f,void * a)772 ch_aliasfun(EditLine *el, el_afunc_t f, void *a)
773 {
774 el->el_chared.c_aliasfun = f;
775 el->el_chared.c_aliasarg = a;
776 return 0;
777 }
778