1 /* $NetBSD: chared.c,v 1.64 2024/06/29 14:13:14 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 1.64 2024/06/29 14:13:14 christos Exp $"); 41 #endif 42 #endif /* not lint && not SCCSID */ 43 44 /* 45 * chared.c: Character editor utilities 46 */ 47 #include <ctype.h> 48 #include <stdlib.h> 49 #include <string.h> 50 51 #include "el.h" 52 #include "common.h" 53 #include "fcns.h" 54 55 /* value to leave unused in line buffer */ 56 #define EL_LEAVE 2 57 58 /* cv_undo(): 59 * Handle state for the vi undo command 60 */ 61 libedit_private void 62 cv_undo(EditLine *el) 63 { 64 c_undo_t *vu = &el->el_chared.c_undo; 65 c_redo_t *r = &el->el_chared.c_redo; 66 size_t size; 67 68 /* Save entire line for undo */ 69 size = (size_t)(el->el_line.lastchar - el->el_line.buffer); 70 vu->len = (ssize_t)size; 71 vu->cursor = (int)(el->el_line.cursor - el->el_line.buffer); 72 (void)memcpy(vu->buf, el->el_line.buffer, size * sizeof(*vu->buf)); 73 74 /* save command info for redo */ 75 r->count = el->el_state.doingarg ? el->el_state.argument : 0; 76 r->action = el->el_chared.c_vcmd.action; 77 r->pos = r->buf; 78 r->cmd = el->el_state.thiscmd; 79 r->ch = el->el_state.thisch; 80 } 81 82 /* cv_yank(): 83 * Save yank/delete data for paste 84 */ 85 libedit_private void 86 cv_yank(EditLine *el, const wchar_t *ptr, int size) 87 { 88 c_kill_t *k = &el->el_chared.c_kill; 89 90 (void)memcpy(k->buf, ptr, (size_t)size * sizeof(*k->buf)); 91 k->last = k->buf + size; 92 } 93 94 95 /* c_insert(): 96 * Insert num characters 97 */ 98 libedit_private void 99 c_insert(EditLine *el, int num) 100 { 101 wchar_t *cp; 102 103 if (el->el_line.lastchar + num >= el->el_line.limit) { 104 if (!ch_enlargebufs(el, (size_t)num)) 105 return; /* can't go past end of buffer */ 106 } 107 108 if (el->el_line.cursor < el->el_line.lastchar) { 109 /* if I must move chars */ 110 for (cp = el->el_line.lastchar; cp >= el->el_line.cursor; cp--) 111 cp[num] = *cp; 112 } 113 el->el_line.lastchar += num; 114 } 115 116 117 /* c_delafter(): 118 * Delete num characters after the cursor 119 */ 120 libedit_private void 121 c_delafter(EditLine *el, int num) 122 { 123 124 if (el->el_line.cursor + num > el->el_line.lastchar) 125 num = (int)(el->el_line.lastchar - el->el_line.cursor); 126 127 if (el->el_map.current != el->el_map.emacs) { 128 cv_undo(el); 129 cv_yank(el, el->el_line.cursor, num); 130 } 131 132 if (num > 0) { 133 wchar_t *cp; 134 135 for (cp = el->el_line.cursor; cp <= el->el_line.lastchar; cp++) 136 *cp = cp[num]; 137 138 el->el_line.lastchar -= num; 139 } 140 } 141 142 143 /* c_delafter1(): 144 * Delete the character after the cursor, do not yank 145 */ 146 libedit_private void 147 c_delafter1(EditLine *el) 148 { 149 wchar_t *cp; 150 151 for (cp = el->el_line.cursor; cp <= el->el_line.lastchar; cp++) 152 *cp = cp[1]; 153 154 el->el_line.lastchar--; 155 } 156 157 158 /* c_delbefore(): 159 * Delete num characters before the cursor 160 */ 161 libedit_private void 162 c_delbefore(EditLine *el, int num) 163 { 164 165 if (el->el_line.cursor - num < el->el_line.buffer) 166 num = (int)(el->el_line.cursor - el->el_line.buffer); 167 168 if (el->el_map.current != el->el_map.emacs) { 169 cv_undo(el); 170 cv_yank(el, el->el_line.cursor - num, num); 171 } 172 173 if (num > 0) { 174 wchar_t *cp; 175 176 for (cp = el->el_line.cursor - num; 177 &cp[num] <= el->el_line.lastchar; 178 cp++) 179 *cp = cp[num]; 180 181 el->el_line.lastchar -= num; 182 } 183 } 184 185 186 /* c_delbefore1(): 187 * Delete the character before the cursor, do not yank 188 */ 189 libedit_private void 190 c_delbefore1(EditLine *el) 191 { 192 wchar_t *cp; 193 194 for (cp = el->el_line.cursor - 1; cp <= el->el_line.lastchar; cp++) 195 *cp = cp[1]; 196 197 el->el_line.lastchar--; 198 } 199 200 201 /* ce__isword(): 202 * Return if p is part of a word according to emacs 203 */ 204 libedit_private int 205 ce__isword(wint_t p) 206 { 207 return iswalnum(p) || wcschr(L"*?_-.[]~=", p) != NULL; 208 } 209 210 211 /* cv__isword(): 212 * Return if p is part of a word according to vi 213 */ 214 libedit_private int 215 cv__isword(wint_t p) 216 { 217 if (iswalnum(p) || p == L'_') 218 return 1; 219 if (iswgraph(p)) 220 return 2; 221 return 0; 222 } 223 224 225 /* cv__isWord(): 226 * Return if p is part of a big word according to vi 227 */ 228 libedit_private int 229 cv__isWord(wint_t p) 230 { 231 return !iswspace(p); 232 } 233 234 235 /* c__prev_word(): 236 * Find the previous word 237 */ 238 libedit_private wchar_t * 239 c__prev_word(wchar_t *p, wchar_t *low, int n, int (*wtest)(wint_t)) 240 { 241 p--; 242 243 while (n--) { 244 while ((p >= low) && !(*wtest)(*p)) 245 p--; 246 while ((p >= low) && (*wtest)(*p)) 247 p--; 248 } 249 250 /* cp now points to one character before the word */ 251 p++; 252 if (p < low) 253 p = low; 254 /* cp now points where we want it */ 255 return p; 256 } 257 258 259 /* c__next_word(): 260 * Find the next word 261 */ 262 libedit_private wchar_t * 263 c__next_word(wchar_t *p, wchar_t *high, int n, int (*wtest)(wint_t)) 264 { 265 while (n--) { 266 while ((p < high) && !(*wtest)(*p)) 267 p++; 268 while ((p < high) && (*wtest)(*p)) 269 p++; 270 } 271 if (p > high) 272 p = high; 273 /* p now points where we want it */ 274 return p; 275 } 276 277 /* cv_next_word(): 278 * Find the next word vi style 279 */ 280 libedit_private wchar_t * 281 cv_next_word(EditLine *el, wchar_t *p, wchar_t *high, int n, 282 int (*wtest)(wint_t)) 283 { 284 int test; 285 286 while (n--) { 287 test = (*wtest)(*p); 288 while ((p < high) && (*wtest)(*p) == test) 289 p++; 290 /* 291 * vi historically deletes with cw only the word preserving the 292 * trailing whitespace! This is not what 'w' does.. 293 */ 294 if (n || el->el_chared.c_vcmd.action != (DELETE|INSERT)) 295 while ((p < high) && iswspace(*p)) 296 p++; 297 } 298 299 /* p now points where we want it */ 300 if (p > high) 301 return high; 302 else 303 return p; 304 } 305 306 307 /* cv_prev_word(): 308 * Find the previous word vi style 309 */ 310 libedit_private wchar_t * 311 cv_prev_word(wchar_t *p, wchar_t *low, int n, int (*wtest)(wint_t)) 312 { 313 int test; 314 315 p--; 316 while (n--) { 317 while ((p > low) && iswspace(*p)) 318 p--; 319 test = (*wtest)(*p); 320 while ((p >= low) && (*wtest)(*p) == test) 321 p--; 322 if (p < low) 323 return low; 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 libedit_private void 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 libedit_private wchar_t * 377 cv__endword(wchar_t *p, wchar_t *high, int n, int (*wtest)(wint_t)) 378 { 379 int test; 380 381 p++; 382 383 while (n--) { 384 while ((p < high) && iswspace(*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 libedit_private int 399 ch_init(EditLine *el) 400 { 401 el->el_line.buffer = el_calloc(EL_BUFSIZ, 402 sizeof(*el->el_line.buffer)); 403 if (el->el_line.buffer == NULL) 404 return -1; 405 406 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_calloc(EL_BUFSIZ, 411 sizeof(*el->el_chared.c_undo.buf)); 412 if (el->el_chared.c_undo.buf == NULL) 413 return -1; 414 el->el_chared.c_undo.len = -1; 415 el->el_chared.c_undo.cursor = 0; 416 el->el_chared.c_redo.buf = el_calloc(EL_BUFSIZ, 417 sizeof(*el->el_chared.c_redo.buf)); 418 if (el->el_chared.c_redo.buf == NULL) 419 goto out; 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; 423 424 el->el_chared.c_vcmd.action = NOP; 425 el->el_chared.c_vcmd.pos = el->el_line.buffer; 426 427 el->el_chared.c_kill.buf = el_calloc(EL_BUFSIZ, 428 sizeof(*el->el_chared.c_kill.buf)); 429 if (el->el_chared.c_kill.buf == NULL) 430 goto out; 431 el->el_chared.c_kill.mark = el->el_line.buffer; 432 el->el_chared.c_kill.last = el->el_chared.c_kill.buf; 433 el->el_chared.c_resizefun = NULL; 434 el->el_chared.c_resizearg = NULL; 435 el->el_chared.c_aliasfun = NULL; 436 el->el_chared.c_aliasarg = NULL; 437 438 el->el_map.current = el->el_map.key; 439 440 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; 445 446 return 0; 447 out: 448 ch_end(el); 449 return -1; 450 } 451 452 /* ch_reset(): 453 * Reset the character editor 454 */ 455 libedit_private void 456 ch_reset(EditLine *el) 457 { 458 el->el_line.cursor = el->el_line.buffer; 459 el->el_line.lastchar = el->el_line.buffer; 460 461 el->el_chared.c_undo.len = -1; 462 el->el_chared.c_undo.cursor = 0; 463 464 el->el_chared.c_vcmd.action = NOP; 465 el->el_chared.c_vcmd.pos = el->el_line.buffer; 466 467 el->el_chared.c_kill.mark = el->el_line.buffer; 468 469 el->el_map.current = el->el_map.key; 470 471 el->el_state.inputmode = MODE_INSERT; /* XXX: save a default */ 472 el->el_state.doingarg = 0; 473 el->el_state.metanext = 0; 474 el->el_state.argument = 1; 475 el->el_state.lastcmd = ED_UNASSIGNED; 476 477 el->el_history.eventno = 0; 478 } 479 480 /* ch_enlargebufs(): 481 * Enlarge line buffer to be able to hold twice as much characters. 482 * Returns 1 if successful, 0 if not. 483 */ 484 libedit_private int 485 ch_enlargebufs(EditLine *el, size_t addlen) 486 { 487 size_t sz, newsz; 488 wchar_t *newbuffer, *oldbuf, *oldkbuf; 489 490 sz = (size_t)(el->el_line.limit - el->el_line.buffer + EL_LEAVE); 491 newsz = sz * 2; 492 /* 493 * If newly required length is longer than current buffer, we need 494 * to make the buffer big enough to hold both old and new stuff. 495 */ 496 if (addlen > sz) { 497 while(newsz - sz < addlen) 498 newsz *= 2; 499 } 500 501 /* 502 * Reallocate line buffer. 503 */ 504 newbuffer = el_realloc(el->el_line.buffer, newsz * sizeof(*newbuffer)); 505 if (!newbuffer) 506 return 0; 507 508 /* zero the newly added memory, leave old data in */ 509 (void) memset(&newbuffer[sz], 0, (newsz - sz) * sizeof(*newbuffer)); 510 511 oldbuf = el->el_line.buffer; 512 513 el->el_line.buffer = newbuffer; 514 el->el_line.cursor = newbuffer + (el->el_line.cursor - oldbuf); 515 el->el_line.lastchar = newbuffer + (el->el_line.lastchar - oldbuf); 516 /* don't set new size until all buffers are enlarged */ 517 el->el_line.limit = &newbuffer[sz - EL_LEAVE]; 518 519 /* 520 * Reallocate kill buffer. 521 */ 522 newbuffer = el_realloc(el->el_chared.c_kill.buf, newsz * 523 sizeof(*newbuffer)); 524 if (!newbuffer) 525 return 0; 526 527 /* zero the newly added memory, leave old data in */ 528 (void) memset(&newbuffer[sz], 0, (newsz - sz) * sizeof(*newbuffer)); 529 530 oldkbuf = el->el_chared.c_kill.buf; 531 532 el->el_chared.c_kill.buf = newbuffer; 533 el->el_chared.c_kill.last = newbuffer + 534 (el->el_chared.c_kill.last - oldkbuf); 535 el->el_chared.c_kill.mark = el->el_line.buffer + 536 (el->el_chared.c_kill.mark - oldbuf); 537 538 /* 539 * Reallocate undo buffer. 540 */ 541 newbuffer = el_realloc(el->el_chared.c_undo.buf, 542 newsz * sizeof(*newbuffer)); 543 if (!newbuffer) 544 return 0; 545 546 /* zero the newly added memory, leave old data in */ 547 (void) memset(&newbuffer[sz], 0, (newsz - sz) * sizeof(*newbuffer)); 548 el->el_chared.c_undo.buf = newbuffer; 549 550 newbuffer = el_realloc(el->el_chared.c_redo.buf, 551 newsz * sizeof(*newbuffer)); 552 if (!newbuffer) 553 return 0; 554 el->el_chared.c_redo.pos = newbuffer + 555 (el->el_chared.c_redo.pos - el->el_chared.c_redo.buf); 556 el->el_chared.c_redo.lim = newbuffer + 557 (el->el_chared.c_redo.lim - el->el_chared.c_redo.buf); 558 el->el_chared.c_redo.buf = newbuffer; 559 560 if (!hist_enlargebuf(el, sz, newsz)) 561 return 0; 562 563 /* Safe to set enlarged buffer size */ 564 el->el_line.limit = &el->el_line.buffer[newsz - EL_LEAVE]; 565 if (el->el_chared.c_resizefun) 566 (*el->el_chared.c_resizefun)(el, el->el_chared.c_resizearg); 567 return 1; 568 } 569 570 /* ch_end(): 571 * Free the data structures used by the editor 572 */ 573 libedit_private void 574 ch_end(EditLine *el) 575 { 576 el_free(el->el_line.buffer); 577 el->el_line.buffer = NULL; 578 el->el_line.limit = NULL; 579 el_free(el->el_chared.c_undo.buf); 580 el->el_chared.c_undo.buf = NULL; 581 el_free(el->el_chared.c_redo.buf); 582 el->el_chared.c_redo.buf = NULL; 583 el->el_chared.c_redo.pos = NULL; 584 el->el_chared.c_redo.lim = NULL; 585 el->el_chared.c_redo.cmd = ED_UNASSIGNED; 586 el_free(el->el_chared.c_kill.buf); 587 el->el_chared.c_kill.buf = NULL; 588 ch_reset(el); 589 } 590 591 592 /* el_insertstr(): 593 * Insert string at cursor 594 */ 595 int 596 el_winsertstr(EditLine *el, const wchar_t *s) 597 { 598 size_t len; 599 600 if (s == NULL || (len = wcslen(s)) == 0) 601 return -1; 602 if (el->el_line.lastchar + len >= el->el_line.limit) { 603 if (!ch_enlargebufs(el, len)) 604 return -1; 605 } 606 607 c_insert(el, (int)len); 608 while (*s) 609 *el->el_line.cursor++ = *s++; 610 return 0; 611 } 612 613 614 /* el_deletestr(): 615 * Delete num characters before the cursor 616 */ 617 void 618 el_deletestr(EditLine *el, int n) 619 { 620 if (n <= 0) 621 return; 622 623 if (el->el_line.cursor < &el->el_line.buffer[n]) 624 return; 625 626 c_delbefore(el, n); /* delete before dot */ 627 el->el_line.cursor -= n; 628 if (el->el_line.cursor < el->el_line.buffer) 629 el->el_line.cursor = el->el_line.buffer; 630 } 631 632 /* el_deletestr1(): 633 * Delete characters between start and end 634 */ 635 int 636 el_deletestr1(EditLine *el, int start, int end) 637 { 638 size_t line_length, len; 639 wchar_t *p1, *p2; 640 641 if (end <= start) 642 return 0; 643 644 line_length = (size_t)(el->el_line.lastchar - el->el_line.buffer); 645 646 if (start >= (int)line_length || end >= (int)line_length) 647 return 0; 648 649 len = (size_t)(end - start); 650 if (len > line_length - (size_t)end) 651 len = line_length - (size_t)end; 652 653 p1 = el->el_line.buffer + start; 654 p2 = el->el_line.buffer + end; 655 for (size_t i = 0; i < len; i++) { 656 *p1++ = *p2++; 657 el->el_line.lastchar--; 658 } 659 660 if (el->el_line.cursor < el->el_line.buffer) 661 el->el_line.cursor = el->el_line.buffer; 662 663 return end - start; 664 } 665 666 /* el_wreplacestr(): 667 * Replace the contents of the line with the provided string 668 */ 669 int 670 el_wreplacestr(EditLine *el, const wchar_t *s) 671 { 672 size_t len; 673 wchar_t * p; 674 675 if (s == NULL || (len = wcslen(s)) == 0) 676 return -1; 677 678 if (el->el_line.buffer + len >= el->el_line.limit) { 679 if (!ch_enlargebufs(el, len)) 680 return -1; 681 } 682 683 p = el->el_line.buffer; 684 for (size_t i = 0; i < len; i++) 685 *p++ = *s++; 686 687 el->el_line.buffer[len] = '\0'; 688 el->el_line.lastchar = el->el_line.buffer + len; 689 if (el->el_line.cursor > el->el_line.lastchar) 690 el->el_line.cursor = el->el_line.lastchar; 691 692 return 0; 693 } 694 695 /* el_cursor(): 696 * Move the cursor to the left or the right of the current position 697 */ 698 int 699 el_cursor(EditLine *el, int n) 700 { 701 if (n == 0) 702 goto out; 703 704 el->el_line.cursor += n; 705 706 if (el->el_line.cursor < el->el_line.buffer) 707 el->el_line.cursor = el->el_line.buffer; 708 if (el->el_line.cursor > el->el_line.lastchar) 709 el->el_line.cursor = el->el_line.lastchar; 710 out: 711 return (int)(el->el_line.cursor - el->el_line.buffer); 712 } 713 714 /* c_gets(): 715 * Get a string 716 */ 717 libedit_private int 718 c_gets(EditLine *el, wchar_t *buf, const wchar_t *prompt) 719 { 720 ssize_t len; 721 wchar_t *cp = el->el_line.buffer, ch; 722 723 if (prompt) { 724 len = (ssize_t)wcslen(prompt); 725 (void)memcpy(cp, prompt, (size_t)len * sizeof(*cp)); 726 cp += len; 727 } 728 len = 0; 729 730 for (;;) { 731 el->el_line.cursor = cp; 732 *cp = ' '; 733 el->el_line.lastchar = cp + 1; 734 re_refresh(el); 735 736 if (el_wgetc(el, &ch) != 1) { 737 ed_end_of_file(el, 0); 738 len = -1; 739 break; 740 } 741 742 switch (ch) { 743 744 case L'\b': /* Delete and backspace */ 745 case 0177: 746 if (len == 0) { 747 len = -1; 748 break; 749 } 750 len--; 751 cp--; 752 continue; 753 754 case 0033: /* ESC */ 755 case L'\r': /* Newline */ 756 case L'\n': 757 buf[len] = ch; 758 break; 759 760 default: 761 if (len >= (ssize_t)(EL_BUFSIZ - 16)) 762 terminal_beep(el); 763 else { 764 buf[len++] = ch; 765 *cp++ = ch; 766 } 767 continue; 768 } 769 break; 770 } 771 772 el->el_line.buffer[0] = '\0'; 773 el->el_line.lastchar = el->el_line.buffer; 774 el->el_line.cursor = el->el_line.buffer; 775 return (int)len; 776 } 777 778 779 /* c_hpos(): 780 * Return the current horizontal position of the cursor 781 */ 782 libedit_private int 783 c_hpos(EditLine *el) 784 { 785 wchar_t *ptr; 786 787 /* 788 * Find how many characters till the beginning of this line. 789 */ 790 if (el->el_line.cursor == el->el_line.buffer) 791 return 0; 792 else { 793 for (ptr = el->el_line.cursor - 1; 794 ptr >= el->el_line.buffer && *ptr != '\n'; 795 ptr--) 796 continue; 797 return (int)(el->el_line.cursor - ptr - 1); 798 } 799 } 800 801 libedit_private int 802 ch_resizefun(EditLine *el, el_zfunc_t f, void *a) 803 { 804 el->el_chared.c_resizefun = f; 805 el->el_chared.c_resizearg = a; 806 return 0; 807 } 808 809 libedit_private int 810 ch_aliasfun(EditLine *el, el_afunc_t f, void *a) 811 { 812 el->el_chared.c_aliasfun = f; 813 el->el_chared.c_aliasarg = a; 814 return 0; 815 } 816
Indexes created Sun Sep 21 14:09:52 GMT 2025