1 /* $OpenBSD: chared.c,v 1.12 2014/10/17 06:07:50 deraadt Exp $ */ 2 /* $NetBSD: chared.c,v 1.28 2009/12/30 22:37:40 christos Exp $ */ 3 4 /*- 5 * Copyright (c) 1992, 1993 6 * The Regents of the University of California. All rights reserved. 7 * 8 * This code is derived from software contributed to Berkeley by 9 * Christos Zoulas of Cornell University. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #include "config.h" 37 38 /* 39 * chared.c: Character editor utilities 40 */ 41 #include <stdlib.h> 42 #include "el.h" 43 44 private void ch__clearmacro (EditLine *); 45 46 /* value to leave unused in line buffer */ 47 #define EL_LEAVE 2 48 49 /* cv_undo(): 50 * Handle state for the vi undo command 51 */ 52 protected void 53 cv_undo(EditLine *el) 54 { 55 c_undo_t *vu = &el->el_chared.c_undo; 56 c_redo_t *r = &el->el_chared.c_redo; 57 size_t size; 58 59 /* Save entire line for undo */ 60 size = el->el_line.lastchar - el->el_line.buffer; 61 vu->len = size; 62 vu->cursor = (int)(el->el_line.cursor - el->el_line.buffer); 63 (void)memcpy(vu->buf, el->el_line.buffer, size * sizeof(*vu->buf)); 64 65 /* save command info for redo */ 66 r->count = el->el_state.doingarg ? el->el_state.argument : 0; 67 r->action = el->el_chared.c_vcmd.action; 68 r->pos = r->buf; 69 r->cmd = el->el_state.thiscmd; 70 r->ch = el->el_state.thisch; 71 } 72 73 /* cv_yank(): 74 * Save yank/delete data for paste 75 */ 76 protected void 77 cv_yank(EditLine *el, const Char *ptr, int size) 78 { 79 c_kill_t *k = &el->el_chared.c_kill; 80 81 (void)memcpy(k->buf, ptr, size * sizeof(*k->buf)); 82 k->last = k->buf + size; 83 } 84 85 86 /* c_insert(): 87 * Insert num characters 88 */ 89 protected void 90 c_insert(EditLine *el, int num) 91 { 92 Char *cp; 93 94 if (el->el_line.lastchar + num >= el->el_line.limit) { 95 if (!ch_enlargebufs(el, (size_t)num)) 96 return; /* can't go past end of buffer */ 97 } 98 99 if (el->el_line.cursor < el->el_line.lastchar) { 100 /* if I must move chars */ 101 for (cp = el->el_line.lastchar; cp >= el->el_line.cursor; cp--) 102 cp[num] = *cp; 103 } 104 el->el_line.lastchar += num; 105 } 106 107 108 /* c_delafter(): 109 * Delete num characters after the cursor 110 */ 111 protected void 112 c_delafter(EditLine *el, int num) 113 { 114 115 if (el->el_line.cursor + num > el->el_line.lastchar) 116 num = (int)(el->el_line.lastchar - el->el_line.cursor); 117 118 if (el->el_map.current != el->el_map.emacs) { 119 cv_undo(el); 120 cv_yank(el, el->el_line.cursor, num); 121 } 122 123 if (num > 0) { 124 Char *cp; 125 126 for (cp = el->el_line.cursor; cp <= el->el_line.lastchar; cp++) 127 *cp = cp[num]; 128 129 el->el_line.lastchar -= num; 130 } 131 } 132 133 134 /* c_delafter1(): 135 * Delete the character after the cursor, do not yank 136 */ 137 protected void 138 c_delafter1(EditLine *el) 139 { 140 Char *cp; 141 142 for (cp = el->el_line.cursor; cp <= el->el_line.lastchar; cp++) 143 *cp = cp[1]; 144 145 el->el_line.lastchar--; 146 } 147 148 149 /* c_delbefore(): 150 * Delete num characters before the cursor 151 */ 152 protected void 153 c_delbefore(EditLine *el, int num) 154 { 155 156 if (el->el_line.cursor - num < el->el_line.buffer) 157 num = (int)(el->el_line.cursor - el->el_line.buffer); 158 159 if (el->el_map.current != el->el_map.emacs) { 160 cv_undo(el); 161 cv_yank(el, el->el_line.cursor - num, num); 162 } 163 164 if (num > 0) { 165 Char *cp; 166 167 for (cp = el->el_line.cursor - num; 168 cp <= el->el_line.lastchar; 169 cp++) 170 *cp = cp[num]; 171 172 el->el_line.lastchar -= num; 173 } 174 } 175 176 177 /* c_delbefore1(): 178 * Delete the character before the cursor, do not yank 179 */ 180 protected void 181 c_delbefore1(EditLine *el) 182 { 183 Char *cp; 184 185 for (cp = el->el_line.cursor - 1; cp <= el->el_line.lastchar; cp++) 186 *cp = cp[1]; 187 188 el->el_line.lastchar--; 189 } 190 191 192 /* ce__isword(): 193 * Return if p is part of a word according to emacs 194 */ 195 protected int 196 ce__isword(Int p) 197 { 198 return (Isalnum(p) || Strchr(STR("*?_-.[]~="), p) != NULL); 199 } 200 201 202 /* cv__isword(): 203 * Return if p is part of a word according to vi 204 */ 205 protected int 206 cv__isword(Int p) 207 { 208 if (Isalnum(p) || p == '_') 209 return 1; 210 if (Isgraph(p)) 211 return 2; 212 return 0; 213 } 214 215 216 /* cv__isWord(): 217 * Return if p is part of a big word according to vi 218 */ 219 protected int 220 cv__isWord(Int p) 221 { 222 return (!Isspace(p)); 223 } 224 225 226 /* c__prev_word(): 227 * Find the previous word 228 */ 229 protected Char * 230 c__prev_word(Char *p, Char *low, int n, int (*wtest)(Int)) 231 { 232 p--; 233 234 while (n--) { 235 while ((p >= low) && !(*wtest)(*p)) 236 p--; 237 while ((p >= low) && (*wtest)(*p)) 238 p--; 239 } 240 241 /* cp now points to one character before the word */ 242 p++; 243 if (p < low) 244 p = low; 245 /* cp now points where we want it */ 246 return (p); 247 } 248 249 250 /* c__next_word(): 251 * Find the next word 252 */ 253 protected Char * 254 c__next_word(Char *p, Char *high, int n, int (*wtest)(Int)) 255 { 256 while (n--) { 257 while ((p < high) && !(*wtest)(*p)) 258 p++; 259 while ((p < high) && (*wtest)(*p)) 260 p++; 261 } 262 if (p > high) 263 p = high; 264 /* p now points where we want it */ 265 return (p); 266 } 267 268 /* cv_next_word(): 269 * Find the next word vi style 270 */ 271 protected Char * 272 cv_next_word(EditLine *el, Char *p, Char *high, int n, int (*wtest)(Int)) 273 { 274 int test; 275 276 while (n--) { 277 test = (*wtest)(*p); 278 while ((p < high) && (*wtest)(*p) == test) 279 p++; 280 /* 281 * vi historically deletes with cw only the word preserving the 282 * trailing whitespace! This is not what 'w' does.. 283 */ 284 if (n || el->el_chared.c_vcmd.action != (DELETE|INSERT)) 285 while ((p < high) && Isspace(*p)) 286 p++; 287 } 288 289 /* p now points where we want it */ 290 if (p > high) 291 return (high); 292 else 293 return (p); 294 } 295 296 297 /* cv_prev_word(): 298 * Find the previous word vi style 299 */ 300 protected Char * 301 cv_prev_word(Char *p, Char *low, int n, int (*wtest)(Int)) 302 { 303 int test; 304 305 p--; 306 while (n--) { 307 while ((p > low) && Isspace(*p)) 308 p--; 309 test = (*wtest)(*p); 310 while ((p >= low) && (*wtest)(*p) == test) 311 p--; 312 } 313 p++; 314 315 /* p now points where we want it */ 316 if (p < low) 317 return (low); 318 else 319 return (p); 320 } 321 322 323 #ifdef notdef 324 /* c__number(): 325 * Ignore character p points to, return number appearing after that. 326 * A '$' by itself means a big number; "$-" is for negative; '^' means 1. 327 * Return p pointing to last char used. 328 */ 329 protected Char * 330 c__number( 331 Char *p, /* character position */ 332 int *num, /* Return value */ 333 int dval) /* dval is the number to subtract from like $-3 */ 334 { 335 int i; 336 int sign = 1; 337 338 if (*++p == '^') { 339 *num = 1; 340 return (p); 341 } 342 if (*p == '$') { 343 if (*++p != '-') { 344 *num = 0x7fffffff; /* Handle $ */ 345 return (--p); 346 } 347 sign = -1; /* Handle $- */ 348 ++p; 349 } 350 /* XXX: this assumes ASCII compatible digits */ 351 for (i = 0; Isdigit(*p); i = 10 * i + *p++ - '0') 352 continue; 353 *num = (sign < 0 ? dval - i : i); 354 return (--p); 355 } 356 #endif 357 358 /* cv_delfini(): 359 * Finish vi delete action 360 */ 361 protected void 362 cv_delfini(EditLine *el) 363 { 364 int size; 365 int action = el->el_chared.c_vcmd.action; 366 367 if (action & INSERT) 368 el->el_map.current = el->el_map.key; 369 370 if (el->el_chared.c_vcmd.pos == 0) 371 /* sanity */ 372 return; 373 374 size = (int)(el->el_line.cursor - el->el_chared.c_vcmd.pos); 375 if (size == 0) 376 size = 1; 377 el->el_line.cursor = el->el_chared.c_vcmd.pos; 378 if (action & YANK) { 379 if (size > 0) 380 cv_yank(el, el->el_line.cursor, size); 381 else 382 cv_yank(el, el->el_line.cursor + size, -size); 383 } else { 384 if (size > 0) { 385 c_delafter(el, size); 386 re_refresh_cursor(el); 387 } else { 388 c_delbefore(el, -size); 389 el->el_line.cursor += size; 390 } 391 } 392 el->el_chared.c_vcmd.action = NOP; 393 } 394 395 396 #ifdef notdef 397 /* ce__endword(): 398 * Go to the end of this word according to emacs 399 */ 400 protected Char * 401 ce__endword(Char *p, Char *high, int n) 402 { 403 p++; 404 405 while (n--) { 406 while ((p < high) && Isspace(*p)) 407 p++; 408 while ((p < high) && !Isspace(*p)) 409 p++; 410 } 411 412 p--; 413 return (p); 414 } 415 #endif 416 417 418 /* cv__endword(): 419 * Go to the end of this word according to vi 420 */ 421 protected Char * 422 cv__endword(Char *p, Char *high, int n, int (*wtest)(Int)) 423 { 424 int test; 425 426 p++; 427 428 while (n--) { 429 while ((p < high) && Isspace(*p)) 430 p++; 431 432 test = (*wtest)(*p); 433 while ((p < high) && (*wtest)(*p) == test) 434 p++; 435 } 436 p--; 437 return (p); 438 } 439 440 /* ch_init(): 441 * Initialize the character editor 442 */ 443 protected int 444 ch_init(EditLine *el) 445 { 446 c_macro_t *ma = &el->el_chared.c_macro; 447 448 el->el_line.buffer = reallocarray(NULL, EL_BUFSIZ, 449 sizeof(*el->el_line.buffer)); 450 if (el->el_line.buffer == NULL) 451 return (-1); 452 453 (void) memset(el->el_line.buffer, 0, EL_BUFSIZ * 454 sizeof(*el->el_line.buffer)); 455 el->el_line.cursor = el->el_line.buffer; 456 el->el_line.lastchar = el->el_line.buffer; 457 el->el_line.limit = &el->el_line.buffer[EL_BUFSIZ - EL_LEAVE]; 458 459 el->el_chared.c_undo.buf = reallocarray(NULL, EL_BUFSIZ, 460 sizeof(*el->el_chared.c_undo.buf)); 461 if (el->el_chared.c_undo.buf == NULL) 462 return (-1); 463 (void) memset(el->el_chared.c_undo.buf, 0, EL_BUFSIZ * 464 sizeof(*el->el_chared.c_undo.buf)); 465 el->el_chared.c_undo.len = -1; 466 el->el_chared.c_undo.cursor = 0; 467 el->el_chared.c_redo.buf = reallocarray(NULL, EL_BUFSIZ, 468 sizeof(*el->el_chared.c_redo.buf)); 469 if (el->el_chared.c_redo.buf == NULL) 470 return (-1); 471 el->el_chared.c_redo.pos = el->el_chared.c_redo.buf; 472 el->el_chared.c_redo.lim = el->el_chared.c_redo.buf + EL_BUFSIZ; 473 el->el_chared.c_redo.cmd = ED_UNASSIGNED; 474 475 el->el_chared.c_vcmd.action = NOP; 476 el->el_chared.c_vcmd.pos = el->el_line.buffer; 477 478 el->el_chared.c_kill.buf = reallocarray(NULL, EL_BUFSIZ, 479 sizeof(*el->el_chared.c_kill.buf)); 480 if (el->el_chared.c_kill.buf == NULL) 481 return (-1); 482 (void) memset(el->el_chared.c_kill.buf, 0, EL_BUFSIZ * 483 sizeof(*el->el_chared.c_kill.buf)); 484 el->el_chared.c_kill.mark = el->el_line.buffer; 485 el->el_chared.c_kill.last = el->el_chared.c_kill.buf; 486 el->el_chared.c_resizefun = NULL; 487 el->el_chared.c_resizearg = NULL; 488 489 el->el_map.current = el->el_map.key; 490 491 el->el_state.inputmode = MODE_INSERT; /* XXX: save a default */ 492 el->el_state.doingarg = 0; 493 el->el_state.metanext = 0; 494 el->el_state.argument = 1; 495 el->el_state.lastcmd = ED_UNASSIGNED; 496 497 ma->level = -1; 498 ma->offset = 0; 499 ma->macro = reallocarray(NULL, EL_MAXMACRO, 500 sizeof(*ma->macro)); 501 if (ma->macro == NULL) 502 return (-1); 503 return (0); 504 } 505 506 /* ch_reset(): 507 * Reset the character editor 508 */ 509 protected void 510 ch_reset(EditLine *el, int mclear) 511 { 512 el->el_line.cursor = el->el_line.buffer; 513 el->el_line.lastchar = el->el_line.buffer; 514 515 el->el_chared.c_undo.len = -1; 516 el->el_chared.c_undo.cursor = 0; 517 518 el->el_chared.c_vcmd.action = NOP; 519 el->el_chared.c_vcmd.pos = el->el_line.buffer; 520 521 el->el_chared.c_kill.mark = el->el_line.buffer; 522 523 el->el_map.current = el->el_map.key; 524 525 el->el_state.inputmode = MODE_INSERT; /* XXX: save a default */ 526 el->el_state.doingarg = 0; 527 el->el_state.metanext = 0; 528 el->el_state.argument = 1; 529 el->el_state.lastcmd = ED_UNASSIGNED; 530 531 el->el_history.eventno = 0; 532 533 if (mclear) 534 ch__clearmacro(el); 535 } 536 537 private void 538 ch__clearmacro(EditLine *el) 539 { 540 c_macro_t *ma = &el->el_chared.c_macro; 541 while (ma->level >= 0) 542 free((ptr_t)ma->macro[ma->level--]); 543 } 544 545 /* ch_enlargebufs(): 546 * Enlarge line buffer to be able to hold twice as much characters. 547 * Returns 1 if successful, 0 if not. 548 */ 549 protected int 550 ch_enlargebufs(EditLine *el, size_t addlen) 551 { 552 size_t sz, newsz; 553 Char *newbuffer, *oldbuf, *oldkbuf; 554 555 sz = el->el_line.limit - el->el_line.buffer + EL_LEAVE; 556 newsz = sz * 2; 557 /* 558 * If newly required length is longer than current buffer, we need 559 * to make the buffer big enough to hold both old and new stuff. 560 */ 561 if (addlen > sz) { 562 while(newsz - sz < addlen) 563 newsz *= 2; 564 } 565 566 /* 567 * Reallocate line buffer. 568 */ 569 newbuffer = reallocarray(el->el_line.buffer, newsz, 570 sizeof(*newbuffer)); 571 if (!newbuffer) 572 return 0; 573 574 /* zero the newly added memory, leave old data in */ 575 (void) memset(&newbuffer[sz], 0, (newsz - sz) * sizeof(*newbuffer)); 576 577 oldbuf = el->el_line.buffer; 578 579 el->el_line.buffer = newbuffer; 580 el->el_line.cursor = newbuffer + (el->el_line.cursor - oldbuf); 581 el->el_line.lastchar = newbuffer + (el->el_line.lastchar - oldbuf); 582 /* don't set new size until all buffers are enlarged */ 583 el->el_line.limit = &newbuffer[sz - EL_LEAVE]; 584 585 /* 586 * Reallocate kill buffer. 587 */ 588 newbuffer = reallocarray(el->el_chared.c_kill.buf, newsz, 589 sizeof(*newbuffer)); 590 if (!newbuffer) 591 return 0; 592 593 /* zero the newly added memory, leave old data in */ 594 (void) memset(&newbuffer[sz], 0, (newsz - sz) * sizeof(*newbuffer)); 595 596 oldkbuf = el->el_chared.c_kill.buf; 597 598 el->el_chared.c_kill.buf = newbuffer; 599 el->el_chared.c_kill.last = newbuffer + 600 (el->el_chared.c_kill.last - oldkbuf); 601 el->el_chared.c_kill.mark = el->el_line.buffer + 602 (el->el_chared.c_kill.mark - oldbuf); 603 604 /* 605 * Reallocate undo buffer. 606 */ 607 newbuffer = reallocarray(el->el_chared.c_undo.buf, 608 newsz, sizeof(*newbuffer)); 609 if (!newbuffer) 610 return 0; 611 612 /* zero the newly added memory, leave old data in */ 613 (void) memset(&newbuffer[sz], 0, (newsz - sz) * sizeof(*newbuffer)); 614 el->el_chared.c_undo.buf = newbuffer; 615 616 newbuffer = reallocarray(el->el_chared.c_redo.buf, 617 newsz, sizeof(*newbuffer)); 618 if (!newbuffer) 619 return 0; 620 el->el_chared.c_redo.pos = newbuffer + 621 (el->el_chared.c_redo.pos - el->el_chared.c_redo.buf); 622 el->el_chared.c_redo.lim = newbuffer + 623 (el->el_chared.c_redo.lim - el->el_chared.c_redo.buf); 624 el->el_chared.c_redo.buf = newbuffer; 625 626 if (!hist_enlargebuf(el, sz, newsz)) 627 return 0; 628 629 /* Safe to set enlarged buffer size */ 630 el->el_line.limit = &el->el_line.buffer[newsz - EL_LEAVE]; 631 if (el->el_chared.c_resizefun) 632 (*el->el_chared.c_resizefun)(el, el->el_chared.c_resizearg); 633 return 1; 634 } 635 636 /* ch_end(): 637 * Free the data structures used by the editor 638 */ 639 protected void 640 ch_end(EditLine *el) 641 { 642 free((ptr_t) el->el_line.buffer); 643 el->el_line.buffer = NULL; 644 el->el_line.limit = NULL; 645 free((ptr_t) el->el_chared.c_undo.buf); 646 el->el_chared.c_undo.buf = NULL; 647 free((ptr_t) el->el_chared.c_redo.buf); 648 el->el_chared.c_redo.buf = NULL; 649 el->el_chared.c_redo.pos = NULL; 650 el->el_chared.c_redo.lim = NULL; 651 el->el_chared.c_redo.cmd = ED_UNASSIGNED; 652 free((ptr_t) el->el_chared.c_kill.buf); 653 el->el_chared.c_kill.buf = NULL; 654 ch_reset(el, 1); 655 free((ptr_t) el->el_chared.c_macro.macro); 656 el->el_chared.c_macro.macro = NULL; 657 } 658 659 660 /* el_insertstr(): 661 * Insert string at cursorI 662 */ 663 public int 664 FUN(el,insertstr)(EditLine *el, const Char *s) 665 { 666 size_t len; 667 668 if ((len = Strlen(s)) == 0) 669 return (-1); 670 if (el->el_line.lastchar + len >= el->el_line.limit) { 671 if (!ch_enlargebufs(el, len)) 672 return (-1); 673 } 674 675 c_insert(el, (int)len); 676 while (*s) 677 *el->el_line.cursor++ = *s++; 678 return (0); 679 } 680 681 682 /* el_deletestr(): 683 * Delete num characters before the cursor 684 */ 685 public void 686 el_deletestr(EditLine *el, int n) 687 { 688 if (n <= 0) 689 return; 690 691 if (el->el_line.cursor < &el->el_line.buffer[n]) 692 return; 693 694 c_delbefore(el, n); /* delete before dot */ 695 el->el_line.cursor -= n; 696 if (el->el_line.cursor < el->el_line.buffer) 697 el->el_line.cursor = el->el_line.buffer; 698 } 699 700 /* c_gets(): 701 * Get a string 702 */ 703 protected int 704 c_gets(EditLine *el, Char *buf, const Char *prompt) 705 { 706 Char ch; 707 ssize_t len; 708 Char *cp = el->el_line.buffer; 709 710 if (prompt) { 711 len = Strlen(prompt); 712 (void)memcpy(cp, prompt, len * sizeof(*cp)); 713 cp += len; 714 } 715 len = 0; 716 717 for (;;) { 718 el->el_line.cursor = cp; 719 *cp = ' '; 720 el->el_line.lastchar = cp + 1; 721 re_refresh(el); 722 723 if (FUN(el,getc)(el, &ch) != 1) { 724 ed_end_of_file(el, 0); 725 len = -1; 726 break; 727 } 728 729 switch (ch) { 730 731 case 0010: /* Delete and backspace */ 732 case 0177: 733 if (len == 0) { 734 len = -1; 735 break; 736 } 737 cp--; 738 continue; 739 740 case 0033: /* ESC */ 741 case '\r': /* Newline */ 742 case '\n': 743 buf[len] = ch; 744 break; 745 746 default: 747 if (len >= EL_BUFSIZ - 16) 748 term_beep(el); 749 else { 750 buf[len++] = ch; 751 *cp++ = ch; 752 } 753 continue; 754 } 755 break; 756 } 757 758 el->el_line.buffer[0] = '\0'; 759 el->el_line.lastchar = el->el_line.buffer; 760 el->el_line.cursor = el->el_line.buffer; 761 return (int)len; 762 } 763 764 765 /* c_hpos(): 766 * Return the current horizontal position of the cursor 767 */ 768 protected int 769 c_hpos(EditLine *el) 770 { 771 Char *ptr; 772 773 /* 774 * Find how many characters till the beginning of this line. 775 */ 776 if (el->el_line.cursor == el->el_line.buffer) 777 return (0); 778 else { 779 for (ptr = el->el_line.cursor - 1; 780 ptr >= el->el_line.buffer && *ptr != '\n'; 781 ptr--) 782 continue; 783 return (int)(el->el_line.cursor - ptr - 1); 784 } 785 } 786 787 protected int 788 ch_resizefun(EditLine *el, el_zfunc_t f, void *a) 789 { 790 el->el_chared.c_resizefun = f; 791 el->el_chared.c_resizearg = a; 792 return 0; 793 } 794