1/* $NetBSD: chared.c,v 1.40 2014/06/18 18:12:28 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 --- 14 unchanged lines hidden (view full) --- 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 |
38static char sccsid[] = "@(#)chared.c 8.1 (Berkeley) 6/4/93"; |
39#else 40__RCSID("$NetBSD: chared.c,v 1.40 2014/06/18 18:12:28 christos Exp $"); 41#endif |
42#endif /* not lint && not SCCSID */ 43#include <sys/cdefs.h> |
44__FBSDID("$FreeBSD: head/lib/libedit/chared.c 276881 2015-01-09 07:40:56Z bapt $"); |
45 46/* 47 * chared.c: Character editor utilities 48 */ |
49#include <stdlib.h> 50#include "el.h" 51 |
52private void ch__clearmacro (EditLine *); |
53 54/* value to leave unused in line buffer */ 55#define EL_LEAVE 2 56 57/* cv_undo(): 58 * Handle state for the vi undo command 59 */ 60protected void 61cv_undo(EditLine *el) 62{ 63 c_undo_t *vu = &el->el_chared.c_undo; 64 c_redo_t *r = &el->el_chared.c_redo; 65 size_t size; 66 67 /* Save entire line for undo */ |
68 size = (size_t)(el->el_line.lastchar - el->el_line.buffer); 69 vu->len = (ssize_t)size; |
70 vu->cursor = (int)(el->el_line.cursor - el->el_line.buffer); |
71 (void)memcpy(vu->buf, el->el_line.buffer, size * sizeof(*vu->buf)); |
72 73 /* save command info for redo */ 74 r->count = el->el_state.doingarg ? el->el_state.argument : 0; 75 r->action = el->el_chared.c_vcmd.action; 76 r->pos = r->buf; 77 r->cmd = el->el_state.thiscmd; 78 r->ch = el->el_state.thisch; 79} 80 81/* cv_yank(): 82 * Save yank/delete data for paste 83 */ 84protected void |
85cv_yank(EditLine *el, const Char *ptr, int size) |
86{ 87 c_kill_t *k = &el->el_chared.c_kill; 88 |
89 (void)memcpy(k->buf, ptr, (size_t)size * sizeof(*k->buf)); |
90 k->last = k->buf + size; 91} 92 93 94/* c_insert(): 95 * Insert num characters 96 */ 97protected void 98c_insert(EditLine *el, int num) 99{ |
100 Char *cp; |
101 102 if (el->el_line.lastchar + num >= el->el_line.limit) { 103 if (!ch_enlargebufs(el, (size_t)num)) 104 return; /* can't go past end of buffer */ 105 } 106 107 if (el->el_line.cursor < el->el_line.lastchar) { 108 /* if I must move chars */ --- 15 unchanged lines hidden (view full) --- 124 num = (int)(el->el_line.lastchar - el->el_line.cursor); 125 126 if (el->el_map.current != el->el_map.emacs) { 127 cv_undo(el); 128 cv_yank(el, el->el_line.cursor, num); 129 } 130 131 if (num > 0) { |
132 Char *cp; |
133 134 for (cp = el->el_line.cursor; cp <= el->el_line.lastchar; cp++) 135 *cp = cp[num]; 136 137 el->el_line.lastchar -= num; 138 } 139} 140 141 142/* c_delafter1(): 143 * Delete the character after the cursor, do not yank 144 */ 145protected void 146c_delafter1(EditLine *el) 147{ |
148 Char *cp; |
149 150 for (cp = el->el_line.cursor; cp <= el->el_line.lastchar; cp++) 151 *cp = cp[1]; 152 153 el->el_line.lastchar--; 154} 155 156 --- 8 unchanged lines hidden (view full) --- 165 num = (int)(el->el_line.cursor - el->el_line.buffer); 166 167 if (el->el_map.current != el->el_map.emacs) { 168 cv_undo(el); 169 cv_yank(el, el->el_line.cursor - num, num); 170 } 171 172 if (num > 0) { |
173 Char *cp; |
174 175 for (cp = el->el_line.cursor - num; 176 cp <= el->el_line.lastchar; 177 cp++) 178 *cp = cp[num]; 179 180 el->el_line.lastchar -= num; 181 } 182} 183 184 185/* c_delbefore1(): 186 * Delete the character before the cursor, do not yank 187 */ 188protected void 189c_delbefore1(EditLine *el) 190{ |
191 Char *cp; |
192 193 for (cp = el->el_line.cursor - 1; cp <= el->el_line.lastchar; cp++) 194 *cp = cp[1]; 195 196 el->el_line.lastchar--; 197} 198 199 200/* ce__isword(): 201 * Return if p is part of a word according to emacs 202 */ 203protected int |
204ce__isword(Int p) |
205{ |
206 return Isalnum(p) || Strchr(STR("*?_-.[]~="), p) != NULL; |
207} 208 209 210/* cv__isword(): 211 * Return if p is part of a word according to vi 212 */ 213protected int |
214cv__isword(Int p) |
215{ |
216 if (Isalnum(p) || p == '_') |
217 return 1; |
218 if (Isgraph(p)) |
219 return 2; 220 return 0; 221} 222 223 224/* cv__isWord(): 225 * Return if p is part of a big word according to vi 226 */ 227protected int |
228cv__isWord(Int p) |
229{ |
230 return !Isspace(p); |
231} 232 233 234/* c__prev_word(): 235 * Find the previous word 236 */ |
237protected Char * 238c__prev_word(Char *p, Char *low, int n, int (*wtest)(Int)) |
239{ 240 p--; 241 242 while (n--) { |
243 while ((p >= low) && !(*wtest)(*p)) |
244 p--; |
245 while ((p >= low) && (*wtest)(*p)) |
246 p--; 247 } 248 249 /* cp now points to one character before the word */ 250 p++; 251 if (p < low) 252 p = low; 253 /* cp now points where we want it */ |
254 return p; |
255} 256 257 258/* c__next_word(): 259 * Find the next word 260 */ |
261protected Char * 262c__next_word(Char *p, Char *high, int n, int (*wtest)(Int)) |
263{ 264 while (n--) { |
265 while ((p < high) && !(*wtest)(*p)) |
266 p++; |
267 while ((p < high) && (*wtest)(*p)) |
268 p++; 269 } 270 if (p > high) 271 p = high; 272 /* p now points where we want it */ |
273 return p; |
274} 275 276/* cv_next_word(): 277 * Find the next word vi style 278 */ |
279protected Char * 280cv_next_word(EditLine *el, Char *p, Char *high, int n, int (*wtest)(Int)) |
281{ 282 int test; 283 284 while (n--) { |
285 test = (*wtest)(*p); 286 while ((p < high) && (*wtest)(*p) == test) |
287 p++; 288 /* 289 * vi historically deletes with cw only the word preserving the 290 * trailing whitespace! This is not what 'w' does.. 291 */ 292 if (n || el->el_chared.c_vcmd.action != (DELETE|INSERT)) |
293 while ((p < high) && Isspace(*p)) |
294 p++; 295 } 296 297 /* p now points where we want it */ 298 if (p > high) |
299 return high; |
300 else |
301 return p; |
302} 303 304 305/* cv_prev_word(): 306 * Find the previous word vi style 307 */ |
308protected Char * 309cv_prev_word(Char *p, Char *low, int n, int (*wtest)(Int)) |
310{ 311 int test; 312 313 p--; 314 while (n--) { |
315 while ((p > low) && Isspace(*p)) |
316 p--; |
317 test = (*wtest)(*p); 318 while ((p >= low) && (*wtest)(*p) == test) |
319 p--; 320 } 321 p++; 322 323 /* p now points where we want it */ 324 if (p < low) |
325 return low; |
326 else |
327 return p; |
328} 329 330 |
331/* cv_delfini(): 332 * Finish vi delete action 333 */ 334protected void 335cv_delfini(EditLine *el) 336{ 337 int size; 338 int action = el->el_chared.c_vcmd.action; --- 22 unchanged lines hidden (view full) --- 361 c_delbefore(el, -size); 362 el->el_line.cursor += size; 363 } 364 } 365 el->el_chared.c_vcmd.action = NOP; 366} 367 368 |
369/* cv__endword(): 370 * Go to the end of this word according to vi 371 */ |
372protected Char * 373cv__endword(Char *p, Char *high, int n, int (*wtest)(Int)) |
374{ 375 int test; 376 377 p++; 378 379 while (n--) { |
380 while ((p < high) && Isspace(*p)) |
381 p++; 382 |
383 test = (*wtest)(*p); 384 while ((p < high) && (*wtest)(*p) == test) |
385 p++; 386 } 387 p--; |
388 return p; |
389} 390 391/* ch_init(): 392 * Initialize the character editor 393 */ 394protected int 395ch_init(EditLine *el) 396{ 397 c_macro_t *ma = &el->el_chared.c_macro; 398 |
399 el->el_line.buffer = el_malloc(EL_BUFSIZ * 400 sizeof(*el->el_line.buffer)); |
401 if (el->el_line.buffer == NULL) |
402 return -1; |
403 |
404 (void) memset(el->el_line.buffer, 0, EL_BUFSIZ * 405 sizeof(*el->el_line.buffer)); |
406 el->el_line.cursor = el->el_line.buffer; 407 el->el_line.lastchar = el->el_line.buffer; 408 el->el_line.limit = &el->el_line.buffer[EL_BUFSIZ - EL_LEAVE]; 409 |
410 el->el_chared.c_undo.buf = el_malloc(EL_BUFSIZ * 411 sizeof(*el->el_chared.c_undo.buf)); |
412 if (el->el_chared.c_undo.buf == NULL) |
413 return -1; 414 (void) memset(el->el_chared.c_undo.buf, 0, EL_BUFSIZ * 415 sizeof(*el->el_chared.c_undo.buf)); |
416 el->el_chared.c_undo.len = -1; 417 el->el_chared.c_undo.cursor = 0; |
418 el->el_chared.c_redo.buf = el_malloc(EL_BUFSIZ * 419 sizeof(*el->el_chared.c_redo.buf)); |
420 if (el->el_chared.c_redo.buf == NULL) |
421 return -1; |
422 el->el_chared.c_redo.pos = el->el_chared.c_redo.buf; 423 el->el_chared.c_redo.lim = el->el_chared.c_redo.buf + EL_BUFSIZ; 424 el->el_chared.c_redo.cmd = ED_UNASSIGNED; 425 426 el->el_chared.c_vcmd.action = NOP; 427 el->el_chared.c_vcmd.pos = el->el_line.buffer; 428 |
429 el->el_chared.c_kill.buf = el_malloc(EL_BUFSIZ * 430 sizeof(*el->el_chared.c_kill.buf)); |
431 if (el->el_chared.c_kill.buf == NULL) |
432 return -1; 433 (void) memset(el->el_chared.c_kill.buf, 0, EL_BUFSIZ * 434 sizeof(*el->el_chared.c_kill.buf)); |
435 el->el_chared.c_kill.mark = el->el_line.buffer; 436 el->el_chared.c_kill.last = el->el_chared.c_kill.buf; |
437 el->el_chared.c_resizefun = NULL; 438 el->el_chared.c_resizearg = NULL; 439 el->el_chared.c_aliasfun = NULL; 440 el->el_chared.c_aliasarg = NULL; |
441 442 el->el_map.current = el->el_map.key; 443 444 el->el_state.inputmode = MODE_INSERT; /* XXX: save a default */ 445 el->el_state.doingarg = 0; 446 el->el_state.metanext = 0; 447 el->el_state.argument = 1; 448 el->el_state.lastcmd = ED_UNASSIGNED; 449 450 ma->level = -1; 451 ma->offset = 0; |
452 ma->macro = el_malloc(EL_MAXMACRO * sizeof(*ma->macro)); |
453 if (ma->macro == NULL) |
454 return -1; 455 return 0; |
456} 457 458/* ch_reset(): 459 * Reset the character editor 460 */ 461protected void 462ch_reset(EditLine *el, int mclear) 463{ --- 22 unchanged lines hidden (view full) --- 486 ch__clearmacro(el); 487} 488 489private void 490ch__clearmacro(EditLine *el) 491{ 492 c_macro_t *ma = &el->el_chared.c_macro; 493 while (ma->level >= 0) |
494 el_free(ma->macro[ma->level--]); |
495} 496 497/* ch_enlargebufs(): 498 * Enlarge line buffer to be able to hold twice as much characters. 499 * Returns 1 if successful, 0 if not. 500 */ 501protected int 502ch_enlargebufs(EditLine *el, size_t addlen) 503{ 504 size_t sz, newsz; |
505 Char *newbuffer, *oldbuf, *oldkbuf; |
506 |
507 sz = (size_t)(el->el_line.limit - el->el_line.buffer + EL_LEAVE); |
508 newsz = sz * 2; 509 /* 510 * If newly required length is longer than current buffer, we need 511 * to make the buffer big enough to hold both old and new stuff. 512 */ 513 if (addlen > sz) { 514 while(newsz - sz < addlen) 515 newsz *= 2; 516 } 517 518 /* 519 * Reallocate line buffer. 520 */ |
521 newbuffer = el_realloc(el->el_line.buffer, newsz * sizeof(*newbuffer)); |
522 if (!newbuffer) 523 return 0; 524 525 /* zero the newly added memory, leave old data in */ |
526 (void) memset(&newbuffer[sz], 0, (newsz - sz) * sizeof(*newbuffer)); |
527 528 oldbuf = el->el_line.buffer; 529 530 el->el_line.buffer = newbuffer; 531 el->el_line.cursor = newbuffer + (el->el_line.cursor - oldbuf); 532 el->el_line.lastchar = newbuffer + (el->el_line.lastchar - oldbuf); 533 /* don't set new size until all buffers are enlarged */ 534 el->el_line.limit = &newbuffer[sz - EL_LEAVE]; 535 536 /* 537 * Reallocate kill buffer. 538 */ |
539 newbuffer = el_realloc(el->el_chared.c_kill.buf, newsz * 540 sizeof(*newbuffer)); |
541 if (!newbuffer) 542 return 0; 543 544 /* zero the newly added memory, leave old data in */ |
545 (void) memset(&newbuffer[sz], 0, (newsz - sz) * sizeof(*newbuffer)); |
546 547 oldkbuf = el->el_chared.c_kill.buf; 548 549 el->el_chared.c_kill.buf = newbuffer; 550 el->el_chared.c_kill.last = newbuffer + 551 (el->el_chared.c_kill.last - oldkbuf); 552 el->el_chared.c_kill.mark = el->el_line.buffer + 553 (el->el_chared.c_kill.mark - oldbuf); 554 555 /* 556 * Reallocate undo buffer. 557 */ |
558 newbuffer = el_realloc(el->el_chared.c_undo.buf, 559 newsz * sizeof(*newbuffer)); |
560 if (!newbuffer) 561 return 0; 562 563 /* zero the newly added memory, leave old data in */ |
564 (void) memset(&newbuffer[sz], 0, (newsz - sz) * sizeof(*newbuffer)); |
565 el->el_chared.c_undo.buf = newbuffer; 566 |
567 newbuffer = el_realloc(el->el_chared.c_redo.buf, 568 newsz * sizeof(*newbuffer)); |
569 if (!newbuffer) 570 return 0; 571 el->el_chared.c_redo.pos = newbuffer + 572 (el->el_chared.c_redo.pos - el->el_chared.c_redo.buf); 573 el->el_chared.c_redo.lim = newbuffer + 574 (el->el_chared.c_redo.lim - el->el_chared.c_redo.buf); 575 el->el_chared.c_redo.buf = newbuffer; 576 577 if (!hist_enlargebuf(el, sz, newsz)) 578 return 0; 579 580 /* Safe to set enlarged buffer size */ 581 el->el_line.limit = &el->el_line.buffer[newsz - EL_LEAVE]; |
582 if (el->el_chared.c_resizefun) 583 (*el->el_chared.c_resizefun)(el, el->el_chared.c_resizearg); |
584 return 1; 585} 586 587/* ch_end(): 588 * Free the data structures used by the editor 589 */ 590protected void 591ch_end(EditLine *el) 592{ |
593 el_free(el->el_line.buffer); |
594 el->el_line.buffer = NULL; 595 el->el_line.limit = NULL; |
596 el_free(el->el_chared.c_undo.buf); |
597 el->el_chared.c_undo.buf = NULL; |
598 el_free(el->el_chared.c_redo.buf); |
599 el->el_chared.c_redo.buf = NULL; 600 el->el_chared.c_redo.pos = NULL; 601 el->el_chared.c_redo.lim = NULL; 602 el->el_chared.c_redo.cmd = ED_UNASSIGNED; |
603 el_free(el->el_chared.c_kill.buf); |
604 el->el_chared.c_kill.buf = NULL; 605 ch_reset(el, 1); |
606 el_free(el->el_chared.c_macro.macro); |
607 el->el_chared.c_macro.macro = NULL; 608} 609 610 611/* el_insertstr(): 612 * Insert string at cursorI 613 */ 614public int |
615FUN(el,insertstr)(EditLine *el, const Char *s) |
616{ 617 size_t len; 618 |
619 if (s == NULL || (len = Strlen(s)) == 0) 620 return -1; |
621 if (el->el_line.lastchar + len >= el->el_line.limit) { 622 if (!ch_enlargebufs(el, len)) |
623 return -1; |
624 } 625 626 c_insert(el, (int)len); 627 while (*s) 628 *el->el_line.cursor++ = *s++; |
629 return 0; |
630} 631 632 633/* el_deletestr(): 634 * Delete num characters before the cursor 635 */ 636public void 637el_deletestr(EditLine *el, int n) --- 5 unchanged lines hidden (view full) --- 643 return; 644 645 c_delbefore(el, n); /* delete before dot */ 646 el->el_line.cursor -= n; 647 if (el->el_line.cursor < el->el_line.buffer) 648 el->el_line.cursor = el->el_line.buffer; 649} 650 |
651/* el_cursor(): 652 * Move the cursor to the left or the right of the current position 653 */ 654public int 655el_cursor(EditLine *el, int n) 656{ 657 if (n == 0) 658 goto out; 659 660 el->el_line.cursor += n; 661 662 if (el->el_line.cursor < el->el_line.buffer) 663 el->el_line.cursor = el->el_line.buffer; 664 if (el->el_line.cursor > el->el_line.lastchar) 665 el->el_line.cursor = el->el_line.lastchar; 666out: 667 return (int)(el->el_line.cursor - el->el_line.buffer); 668} 669 |
670/* c_gets(): 671 * Get a string 672 */ 673protected int |
674c_gets(EditLine *el, Char *buf, const Char *prompt) |
675{ |
676 Char ch; |
677 ssize_t len; |
678 Char *cp = el->el_line.buffer; |
679 680 if (prompt) { |
681 len = (ssize_t)Strlen(prompt); 682 (void)memcpy(cp, prompt, (size_t)len * sizeof(*cp)); |
683 cp += len; 684 } 685 len = 0; 686 687 for (;;) { 688 el->el_line.cursor = cp; 689 *cp = ' '; 690 el->el_line.lastchar = cp + 1; 691 re_refresh(el); 692 |
693 if (FUN(el,getc)(el, &ch) != 1) { |
694 ed_end_of_file(el, 0); 695 len = -1; 696 break; 697 } 698 699 switch (ch) { 700 |
701 case 0010: /* Delete and backspace */ 702 case 0177: |
703 if (len == 0) { 704 len = -1; 705 break; 706 } 707 cp--; 708 continue; 709 |
710 case 0033: /* ESC */ |
711 case '\r': /* Newline */ 712 case '\n': 713 buf[len] = ch; 714 break; 715 716 default: |
717 if (len >= (ssize_t)(EL_BUFSIZ - 16)) 718 terminal_beep(el); |
719 else { 720 buf[len++] = ch; 721 *cp++ = ch; 722 } 723 continue; 724 } 725 break; 726 } --- 6 unchanged lines hidden (view full) --- 733 734 735/* c_hpos(): 736 * Return the current horizontal position of the cursor 737 */ 738protected int 739c_hpos(EditLine *el) 740{ |
741 Char *ptr; |
742 743 /* 744 * Find how many characters till the beginning of this line. 745 */ 746 if (el->el_line.cursor == el->el_line.buffer) |
747 return 0; |
748 else { 749 for (ptr = el->el_line.cursor - 1; 750 ptr >= el->el_line.buffer && *ptr != '\n'; 751 ptr--) 752 continue; 753 return (int)(el->el_line.cursor - ptr - 1); 754 } 755} |
756 757protected int 758ch_resizefun(EditLine *el, el_zfunc_t f, void *a) 759{ 760 el->el_chared.c_resizefun = f; 761 el->el_chared.c_resizearg = a; 762 return 0; 763} 764 765protected int 766ch_aliasfun(EditLine *el, el_afunc_t f, void *a) 767{ 768 el->el_chared.c_aliasfun = f; 769 el->el_chared.c_aliasarg = a; 770 return 0; 771} |