1 /* $NetBSD: chared.c,v 1.37 2012/07/18 17:12:39 christos Exp $ */
4 * Copyright (c) 1992, 1993
5 * The Regents of the University of California. All rights reserved.
7 * This code is derived from software contributed to Berkeley by
8 * Christos Zoulas of Cornell University.
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
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.
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
36 #if !defined(lint) && !defined(SCCSID)
38 static char sccsid[] = "@(#)chared.c 8.1 (Berkeley) 6/4/93";
40 __RCSID("$NetBSD: chared.c,v 1.37 2012/07/18 17:12:39 christos Exp $");
42 #endif /* not lint && not SCCSID */
45 * chared.c: Character editor utilities
50 private void ch__clearmacro (EditLine *);
52 /* value to leave unused in line buffer */
56 * Handle state for the vi undo command
61 c_undo_t *vu = &el->el_chared.c_undo;
62 c_redo_t *r = &el->el_chared.c_redo;
65 /* Save entire line for undo */
66 size = (size_t)(el->el_line.lastchar - el->el_line.buffer);
67 vu->len = (ssize_t)size;
68 vu->cursor = (int)(el->el_line.cursor - el->el_line.buffer);
69 (void)memcpy(vu->buf, el->el_line.buffer, size * sizeof(*vu->buf));
71 /* save command info for redo */
72 r->count = el->el_state.doingarg ? el->el_state.argument : 0;
73 r->action = el->el_chared.c_vcmd.action;
75 r->cmd = el->el_state.thiscmd;
76 r->ch = el->el_state.thisch;
80 * Save yank/delete data for paste
83 cv_yank(EditLine *el, const Char *ptr, int size)
85 c_kill_t *k = &el->el_chared.c_kill;
87 (void)memcpy(k->buf, ptr, (size_t)size * sizeof(*k->buf));
88 k->last = k->buf + size;
93 * Insert num characters
96 c_insert(EditLine *el, int num)
100 if (el->el_line.lastchar + num >= el->el_line.limit) {
101 if (!ch_enlargebufs(el, (size_t)num))
102 return; /* can't go past end of buffer */
105 if (el->el_line.cursor < el->el_line.lastchar) {
106 /* if I must move chars */
107 for (cp = el->el_line.lastchar; cp >= el->el_line.cursor; cp--)
110 el->el_line.lastchar += num;
115 * Delete num characters after the cursor
118 c_delafter(EditLine *el, int num)
121 if (el->el_line.cursor + num > el->el_line.lastchar)
122 num = (int)(el->el_line.lastchar - el->el_line.cursor);
124 if (el->el_map.current != el->el_map.emacs) {
126 cv_yank(el, el->el_line.cursor, num);
132 for (cp = el->el_line.cursor; cp <= el->el_line.lastchar; cp++)
135 el->el_line.lastchar -= num;
141 * Delete the character after the cursor, do not yank
144 c_delafter1(EditLine *el)
148 for (cp = el->el_line.cursor; cp <= el->el_line.lastchar; cp++)
151 el->el_line.lastchar--;
156 * Delete num characters before the cursor
159 c_delbefore(EditLine *el, int num)
162 if (el->el_line.cursor - num < el->el_line.buffer)
163 num = (int)(el->el_line.cursor - el->el_line.buffer);
165 if (el->el_map.current != el->el_map.emacs) {
167 cv_yank(el, el->el_line.cursor - num, num);
173 for (cp = el->el_line.cursor - num;
174 cp <= el->el_line.lastchar;
178 el->el_line.lastchar -= num;
184 * Delete the character before the cursor, do not yank
187 c_delbefore1(EditLine *el)
191 for (cp = el->el_line.cursor - 1; cp <= el->el_line.lastchar; cp++)
194 el->el_line.lastchar--;
199 * Return if p is part of a word according to emacs
204 return Isalnum(p) || Strchr(STR("*?_-.[]~="), p) != NULL;
209 * Return if p is part of a word according to vi
214 if (Isalnum(p) || p == '_')
223 * Return if p is part of a big word according to vi
233 * Find the previous word
236 c__prev_word(Char *p, Char *low, int n, int (*wtest)(Int))
241 while ((p >= low) && !(*wtest)(*p))
243 while ((p >= low) && (*wtest)(*p))
247 /* cp now points to one character before the word */
251 /* cp now points where we want it */
260 c__next_word(Char *p, Char *high, int n, int (*wtest)(Int))
263 while ((p < high) && !(*wtest)(*p))
265 while ((p < high) && (*wtest)(*p))
270 /* p now points where we want it */
275 * Find the next word vi style
278 cv_next_word(EditLine *el, Char *p, Char *high, int n, int (*wtest)(Int))
284 while ((p < high) && (*wtest)(*p) == test)
287 * vi historically deletes with cw only the word preserving the
288 * trailing whitespace! This is not what 'w' does..
290 if (n || el->el_chared.c_vcmd.action != (DELETE|INSERT))
291 while ((p < high) && Isspace(*p))
295 /* p now points where we want it */
304 * Find the previous word vi style
307 cv_prev_word(Char *p, Char *low, int n, int (*wtest)(Int))
313 while ((p > low) && Isspace(*p))
316 while ((p >= low) && (*wtest)(*p) == test)
321 /* p now points where we want it */
330 * Finish vi delete action
333 cv_delfini(EditLine *el)
336 int action = el->el_chared.c_vcmd.action;
339 el->el_map.current = el->el_map.key;
341 if (el->el_chared.c_vcmd.pos == 0)
345 size = (int)(el->el_line.cursor - el->el_chared.c_vcmd.pos);
348 el->el_line.cursor = el->el_chared.c_vcmd.pos;
351 cv_yank(el, el->el_line.cursor, size);
353 cv_yank(el, el->el_line.cursor + size, -size);
356 c_delafter(el, size);
357 re_refresh_cursor(el);
359 c_delbefore(el, -size);
360 el->el_line.cursor += size;
363 el->el_chared.c_vcmd.action = NOP;
368 * Go to the end of this word according to vi
371 cv__endword(Char *p, Char *high, int n, int (*wtest)(Int))
378 while ((p < high) && Isspace(*p))
382 while ((p < high) && (*wtest)(*p) == test)
390 * Initialize the character editor
393 ch_init(EditLine *el)
395 c_macro_t *ma = &el->el_chared.c_macro;
397 el->el_line.buffer = el_malloc(EL_BUFSIZ *
398 sizeof(*el->el_line.buffer));
399 if (el->el_line.buffer == NULL)
402 (void) memset(el->el_line.buffer, 0, EL_BUFSIZ *
403 sizeof(*el->el_line.buffer));
404 el->el_line.cursor = el->el_line.buffer;
405 el->el_line.lastchar = el->el_line.buffer;
406 el->el_line.limit = &el->el_line.buffer[EL_BUFSIZ - EL_LEAVE];
408 el->el_chared.c_undo.buf = el_malloc(EL_BUFSIZ *
409 sizeof(*el->el_chared.c_undo.buf));
410 if (el->el_chared.c_undo.buf == NULL)
412 (void) memset(el->el_chared.c_undo.buf, 0, EL_BUFSIZ *
413 sizeof(*el->el_chared.c_undo.buf));
414 el->el_chared.c_undo.len = -1;
415 el->el_chared.c_undo.cursor = 0;
416 el->el_chared.c_redo.buf = el_malloc(EL_BUFSIZ *
417 sizeof(*el->el_chared.c_redo.buf));
418 if (el->el_chared.c_redo.buf == NULL)
420 el->el_chared.c_redo.pos = el->el_chared.c_redo.buf;
421 el->el_chared.c_redo.lim = el->el_chared.c_redo.buf + EL_BUFSIZ;
422 el->el_chared.c_redo.cmd = ED_UNASSIGNED;
424 el->el_chared.c_vcmd.action = NOP;
425 el->el_chared.c_vcmd.pos = el->el_line.buffer;
427 el->el_chared.c_kill.buf = el_malloc(EL_BUFSIZ *
428 sizeof(*el->el_chared.c_kill.buf));
429 if (el->el_chared.c_kill.buf == NULL)
431 (void) memset(el->el_chared.c_kill.buf, 0, EL_BUFSIZ *
432 sizeof(*el->el_chared.c_kill.buf));
433 el->el_chared.c_kill.mark = el->el_line.buffer;
434 el->el_chared.c_kill.last = el->el_chared.c_kill.buf;
435 el->el_chared.c_resizefun = NULL;
436 el->el_chared.c_resizearg = NULL;
438 el->el_map.current = el->el_map.key;
440 el->el_state.inputmode = MODE_INSERT; /* XXX: save a default */
441 el->el_state.doingarg = 0;
442 el->el_state.metanext = 0;
443 el->el_state.argument = 1;
444 el->el_state.lastcmd = ED_UNASSIGNED;
448 ma->macro = el_malloc(EL_MAXMACRO * sizeof(*ma->macro));
449 if (ma->macro == NULL)
455 * Reset the character editor
458 ch_reset(EditLine *el, int mclear)
460 el->el_line.cursor = el->el_line.buffer;
461 el->el_line.lastchar = el->el_line.buffer;
463 el->el_chared.c_undo.len = -1;
464 el->el_chared.c_undo.cursor = 0;
466 el->el_chared.c_vcmd.action = NOP;
467 el->el_chared.c_vcmd.pos = el->el_line.buffer;
469 el->el_chared.c_kill.mark = el->el_line.buffer;
471 el->el_map.current = el->el_map.key;
473 el->el_state.inputmode = MODE_INSERT; /* XXX: save a default */
474 el->el_state.doingarg = 0;
475 el->el_state.metanext = 0;
476 el->el_state.argument = 1;
477 el->el_state.lastcmd = ED_UNASSIGNED;
479 el->el_history.eventno = 0;
486 ch__clearmacro(EditLine *el)
488 c_macro_t *ma = &el->el_chared.c_macro;
489 while (ma->level >= 0)
490 el_free(ma->macro[ma->level--]);
494 * Enlarge line buffer to be able to hold twice as much characters.
495 * Returns 1 if successful, 0 if not.
498 ch_enlargebufs(EditLine *el, size_t addlen)
501 Char *newbuffer, *oldbuf, *oldkbuf;
503 sz = (size_t)(el->el_line.limit - el->el_line.buffer + EL_LEAVE);
506 * If newly required length is longer than current buffer, we need
507 * to make the buffer big enough to hold both old and new stuff.
510 while(newsz - sz < addlen)
515 * Reallocate line buffer.
517 newbuffer = el_realloc(el->el_line.buffer, newsz * sizeof(*newbuffer));
521 /* zero the newly added memory, leave old data in */
522 (void) memset(&newbuffer[sz], 0, (newsz - sz) * sizeof(*newbuffer));
524 oldbuf = el->el_line.buffer;
526 el->el_line.buffer = newbuffer;
527 el->el_line.cursor = newbuffer + (el->el_line.cursor - oldbuf);
528 el->el_line.lastchar = newbuffer + (el->el_line.lastchar - oldbuf);
529 /* don't set new size until all buffers are enlarged */
530 el->el_line.limit = &newbuffer[sz - EL_LEAVE];
533 * Reallocate kill buffer.
535 newbuffer = el_realloc(el->el_chared.c_kill.buf, newsz *
540 /* zero the newly added memory, leave old data in */
541 (void) memset(&newbuffer[sz], 0, (newsz - sz) * sizeof(*newbuffer));
543 oldkbuf = el->el_chared.c_kill.buf;
545 el->el_chared.c_kill.buf = newbuffer;
546 el->el_chared.c_kill.last = newbuffer +
547 (el->el_chared.c_kill.last - oldkbuf);
548 el->el_chared.c_kill.mark = el->el_line.buffer +
549 (el->el_chared.c_kill.mark - oldbuf);
552 * Reallocate undo buffer.
554 newbuffer = el_realloc(el->el_chared.c_undo.buf,
555 newsz * sizeof(*newbuffer));
559 /* zero the newly added memory, leave old data in */
560 (void) memset(&newbuffer[sz], 0, (newsz - sz) * sizeof(*newbuffer));
561 el->el_chared.c_undo.buf = newbuffer;
563 newbuffer = el_realloc(el->el_chared.c_redo.buf,
564 newsz * sizeof(*newbuffer));
567 el->el_chared.c_redo.pos = newbuffer +
568 (el->el_chared.c_redo.pos - el->el_chared.c_redo.buf);
569 el->el_chared.c_redo.lim = newbuffer +
570 (el->el_chared.c_redo.lim - el->el_chared.c_redo.buf);
571 el->el_chared.c_redo.buf = newbuffer;
573 if (!hist_enlargebuf(el, sz, newsz))
576 /* Safe to set enlarged buffer size */
577 el->el_line.limit = &el->el_line.buffer[newsz - EL_LEAVE];
578 if (el->el_chared.c_resizefun)
579 (*el->el_chared.c_resizefun)(el, el->el_chared.c_resizearg);
584 * Free the data structures used by the editor
589 el_free(el->el_line.buffer);
590 el->el_line.buffer = NULL;
591 el->el_line.limit = NULL;
592 el_free(el->el_chared.c_undo.buf);
593 el->el_chared.c_undo.buf = NULL;
594 el_free(el->el_chared.c_redo.buf);
595 el->el_chared.c_redo.buf = NULL;
596 el->el_chared.c_redo.pos = NULL;
597 el->el_chared.c_redo.lim = NULL;
598 el->el_chared.c_redo.cmd = ED_UNASSIGNED;
599 el_free(el->el_chared.c_kill.buf);
600 el->el_chared.c_kill.buf = NULL;
602 el_free(el->el_chared.c_macro.macro);
603 el->el_chared.c_macro.macro = NULL;
608 * Insert string at cursorI
611 FUN(el,insertstr)(EditLine *el, const Char *s)
615 if (s == NULL || (len = Strlen(s)) == 0)
617 if (el->el_line.lastchar + len >= el->el_line.limit) {
618 if (!ch_enlargebufs(el, len))
622 c_insert(el, (int)len);
624 *el->el_line.cursor++ = *s++;
630 * Delete num characters before the cursor
633 el_deletestr(EditLine *el, int n)
638 if (el->el_line.cursor < &el->el_line.buffer[n])
641 c_delbefore(el, n); /* delete before dot */
642 el->el_line.cursor -= n;
643 if (el->el_line.cursor < el->el_line.buffer)
644 el->el_line.cursor = el->el_line.buffer;
651 c_gets(EditLine *el, Char *buf, const Char *prompt)
655 Char *cp = el->el_line.buffer;
658 len = (ssize_t)Strlen(prompt);
659 (void)memcpy(cp, prompt, (size_t)len * sizeof(*cp));
665 el->el_line.cursor = cp;
667 el->el_line.lastchar = cp + 1;
670 if (FUN(el,getc)(el, &ch) != 1) {
671 ed_end_of_file(el, 0);
678 case 0010: /* Delete and backspace */
688 case '\r': /* Newline */
694 if (len >= (ssize_t)(EL_BUFSIZ - 16))
705 el->el_line.buffer[0] = '\0';
706 el->el_line.lastchar = el->el_line.buffer;
707 el->el_line.cursor = el->el_line.buffer;
713 * Return the current horizontal position of the cursor
721 * Find how many characters till the beginning of this line.
723 if (el->el_line.cursor == el->el_line.buffer)
726 for (ptr = el->el_line.cursor - 1;
727 ptr >= el->el_line.buffer && *ptr != '\n';
730 return (int)(el->el_line.cursor - ptr - 1);
735 ch_resizefun(EditLine *el, el_zfunc_t f, void *a)
737 el->el_chared.c_resizefun = f;
738 el->el_chared.c_resizearg = a;