1/*- 2 * Copyright (c) 1992, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * Christos Zoulas of Cornell University. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. Neither the name of the University nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 * 32 * $NetBSD: chared.c,v 1.27 2009/02/15 21:55:23 christos Exp $ 33 */ 34 35#if !defined(lint) && !defined(SCCSID) 36static char sccsid[] = "@(#)chared.c 8.1 (Berkeley) 6/4/93"; 37#endif /* not lint && not SCCSID */ 38#include <sys/cdefs.h> 39__FBSDID("$FreeBSD$"); 40 41/* 42 * chared.c: Character editor utilities 43 */ 44#include "sys.h" 45 46#include <stdlib.h> 47#include "el.h" 48 49private void ch__clearmacro(EditLine *); 50 51/* value to leave unused in line buffer */ 52#define EL_LEAVE 2 53 54/* cv_undo(): 55 * Handle state for the vi undo command 56 */ 57protected void 58cv_undo(EditLine *el) 59{ 60 c_undo_t *vu = &el->el_chared.c_undo; 61 c_redo_t *r = &el->el_chared.c_redo; 62 size_t size; 63 64 /* Save entire line for undo */ 65 size = el->el_line.lastchar - el->el_line.buffer; 66 vu->len = size; 67 vu->cursor = (int)(el->el_line.cursor - el->el_line.buffer); 68 memcpy(vu->buf, el->el_line.buffer, size); 69 70 /* save command info for redo */ 71 r->count = el->el_state.doingarg ? el->el_state.argument : 0; 72 r->action = el->el_chared.c_vcmd.action; 73 r->pos = r->buf; 74 r->cmd = el->el_state.thiscmd; 75 r->ch = el->el_state.thisch; 76} 77 78/* cv_yank(): 79 * Save yank/delete data for paste 80 */ 81protected void 82cv_yank(EditLine *el, const char *ptr, int size) 83{ 84 c_kill_t *k = &el->el_chared.c_kill; 85 86 memcpy(k->buf, ptr, (size_t)size); 87 k->last = k->buf + size; 88} 89 90 91/* c_insert(): 92 * Insert num characters 93 */ 94protected void 95c_insert(EditLine *el, int num) 96{ 97 char *cp; 98 99 if (el->el_line.lastchar + num >= el->el_line.limit) { 100 if (!ch_enlargebufs(el, (size_t)num)) 101 return; /* can't go past end of buffer */ 102 } 103 104 if (el->el_line.cursor < el->el_line.lastchar) { 105 /* if I must move chars */ 106 for (cp = el->el_line.lastchar; cp >= el->el_line.cursor; cp--) 107 cp[num] = *cp; 108 } 109 el->el_line.lastchar += num; 110} 111 112 113/* c_delafter(): 114 * Delete num characters after the cursor 115 */ 116protected void 117c_delafter(EditLine *el, int num) 118{ 119 120 if (el->el_line.cursor + num > el->el_line.lastchar) 121 num = (int)(el->el_line.lastchar - el->el_line.cursor); 122 123 if (el->el_map.current != el->el_map.emacs) { 124 cv_undo(el); 125 cv_yank(el, el->el_line.cursor, num); 126 } 127 128 if (num > 0) { 129 char *cp; 130 131 for (cp = el->el_line.cursor; cp <= el->el_line.lastchar; cp++) 132 *cp = cp[num]; 133 134 el->el_line.lastchar -= num; 135 } 136} 137 138 139/* c_delafter1(): 140 * Delete the character after the cursor, do not yank 141 */ 142protected void 143c_delafter1(EditLine *el) 144{ 145 char *cp; 146 147 for (cp = el->el_line.cursor; cp <= el->el_line.lastchar; cp++) 148 *cp = cp[1]; 149 150 el->el_line.lastchar--; 151} 152 153 154/* c_delbefore(): 155 * Delete num characters before the cursor 156 */ 157protected void 158c_delbefore(EditLine *el, int num) 159{ 160 161 if (el->el_line.cursor - num < el->el_line.buffer) 162 num = (int)(el->el_line.cursor - el->el_line.buffer); 163 164 if (el->el_map.current != el->el_map.emacs) { 165 cv_undo(el); 166 cv_yank(el, el->el_line.cursor - num, num); 167 } 168 169 if (num > 0) { 170 char *cp; 171 172 for (cp = el->el_line.cursor - num; 173 cp <= el->el_line.lastchar; 174 cp++) 175 *cp = cp[num]; 176 177 el->el_line.lastchar -= num; 178 } 179} 180 181 182/* c_delbefore1(): 183 * Delete the character before the cursor, do not yank 184 */ 185protected void 186c_delbefore1(EditLine *el) 187{ 188 char *cp; 189 190 for (cp = el->el_line.cursor - 1; cp <= el->el_line.lastchar; cp++) 191 *cp = cp[1]; 192 193 el->el_line.lastchar--; 194} 195 196 197/* ce__isword(): 198 * Return if p is part of a word according to emacs 199 */ 200protected int 201ce__isword(int p) 202{ 203 return (isalnum(p) || strchr("*?_-.[]~=", p) != NULL); 204} 205 206 207/* cv__isword(): 208 * Return if p is part of a word according to vi 209 */ 210protected int 211cv__isword(int p) 212{ 213 if (isalnum(p) || p == '_') 214 return 1; 215 if (isgraph(p)) 216 return 2; 217 return 0; 218} 219 220 221/* cv__isWord(): 222 * Return if p is part of a big word according to vi 223 */ 224protected int 225cv__isWord(int p) 226{ 227 return (!isspace(p)); 228} 229 230 231/* c__prev_word(): 232 * Find the previous word 233 */ 234protected char * 235c__prev_word(char *p, char *low, int n, int (*wtest)(int)) 236{ 237 p--; 238 239 while (n--) { 240 while ((p >= low) && !(*wtest)((unsigned char) *p)) 241 p--; 242 while ((p >= low) && (*wtest)((unsigned char) *p)) 243 p--; 244 } 245 246 /* cp now points to one character before the word */ 247 p++; 248 if (p < low) 249 p = low; 250 /* cp now points where we want it */ 251 return (p); 252} 253 254 255/* c__next_word(): 256 * Find the next word 257 */ 258protected char * 259c__next_word(char *p, char *high, int n, int (*wtest)(int)) 260{ 261 while (n--) { 262 while ((p < high) && !(*wtest)((unsigned char) *p)) 263 p++; 264 while ((p < high) && (*wtest)((unsigned char) *p)) 265 p++; 266 } 267 if (p > high) 268 p = high; 269 /* p now points where we want it */ 270 return (p); 271} 272 273/* cv_next_word(): 274 * Find the next word vi style 275 */ 276protected char * 277cv_next_word(EditLine *el, char *p, char *high, int n, int (*wtest)(int)) 278{ 279 int test; 280 281 while (n--) { 282 test = (*wtest)((unsigned char) *p); 283 while ((p < high) && (*wtest)((unsigned char) *p) == test) 284 p++; 285 /* 286 * vi historically deletes with cw only the word preserving the 287 * trailing whitespace! This is not what 'w' does.. 288 */ 289 if (n || el->el_chared.c_vcmd.action != (DELETE|INSERT)) 290 while ((p < high) && isspace((unsigned char) *p)) 291 p++; 292 } 293 294 /* p now points where we want it */ 295 if (p > high) 296 return (high); 297 else 298 return (p); 299} 300 301 302/* cv_prev_word(): 303 * Find the previous word vi style 304 */ 305protected char * 306cv_prev_word(char *p, char *low, int n, int (*wtest)(int)) 307{ 308 int test; 309 310 p--; 311 while (n--) { 312 while ((p > low) && isspace((unsigned char) *p)) 313 p--; 314 test = (*wtest)((unsigned char) *p); 315 while ((p >= low) && (*wtest)((unsigned char) *p) == test) 316 p--; 317 } 318 p++; 319 320 /* p now points where we want it */ 321 if (p < low) 322 return (low); 323 else 324 return (p); 325} 326 327 328#ifdef notdef 329/* c__number(): 330 * Ignore character p points to, return number appearing after that. 331 * A '$' by itself means a big number; "$-" is for negative; '^' means 1. 332 * Return p pointing to last char used. 333 */ 334protected char * 335c__number( 336 char *p, /* character position */ 337 int *num, /* Return value */ 338 int dval) /* dval is the number to subtract from like $-3 */ 339{ 340 int i; 341 int sign = 1; 342 343 if (*++p == '^') { 344 *num = 1; 345 return (p); 346 } 347 if (*p == '$') { 348 if (*++p != '-') { 349 *num = 0x7fffffff; /* Handle $ */ 350 return (--p); 351 } 352 sign = -1; /* Handle $- */ 353 ++p; 354 } 355 for (i = 0; isdigit((unsigned char) *p); i = 10 * i + *p++ - '0') 356 continue; 357 *num = (sign < 0 ? dval - i : i); 358 return (--p); 359} 360#endif 361 362/* cv_delfini(): 363 * Finish vi delete action 364 */ 365protected void 366cv_delfini(EditLine *el) 367{ 368 int size; 369 int action = el->el_chared.c_vcmd.action; 370 371 if (action & INSERT) 372 el->el_map.current = el->el_map.key; 373 374 if (el->el_chared.c_vcmd.pos == 0) 375 /* sanity */ 376 return; 377 378 size = (int)(el->el_line.cursor - el->el_chared.c_vcmd.pos); 379 if (size == 0) 380 size = 1; 381 el->el_line.cursor = el->el_chared.c_vcmd.pos; 382 if (action & YANK) { 383 if (size > 0) 384 cv_yank(el, el->el_line.cursor, size); 385 else 386 cv_yank(el, el->el_line.cursor + size, -size); 387 } else { 388 if (size > 0) { 389 c_delafter(el, size); 390 re_refresh_cursor(el); 391 } else { 392 c_delbefore(el, -size); 393 el->el_line.cursor += size; 394 } 395 } 396 el->el_chared.c_vcmd.action = NOP; 397} 398 399 400#ifdef notdef 401/* ce__endword(): 402 * Go to the end of this word according to emacs 403 */ 404protected char * 405ce__endword(char *p, char *high, int n) 406{ 407 p++; 408 409 while (n--) { 410 while ((p < high) && isspace((unsigned char) *p)) 411 p++; 412 while ((p < high) && !isspace((unsigned char) *p)) 413 p++; 414 } 415 416 p--; 417 return (p); 418} 419#endif 420 421 422/* cv__endword(): 423 * Go to the end of this word according to vi 424 */ 425protected char * 426cv__endword(char *p, char *high, int n, int (*wtest)(int)) 427{ 428 int test; 429 430 p++; 431 432 while (n--) { 433 while ((p < high) && isspace((unsigned char) *p)) 434 p++; 435 436 test = (*wtest)((unsigned char) *p); 437 while ((p < high) && (*wtest)((unsigned char) *p) == test) 438 p++; 439 } 440 p--; 441 return (p); 442} 443 444/* ch_init(): 445 * Initialize the character editor 446 */ 447protected int 448ch_init(EditLine *el) 449{ 450 c_macro_t *ma = &el->el_chared.c_macro; 451 452 el->el_line.buffer = (char *) el_malloc(EL_BUFSIZ); 453 if (el->el_line.buffer == NULL) 454 return (-1); 455 456 (void) memset(el->el_line.buffer, 0, EL_BUFSIZ); 457 el->el_line.cursor = el->el_line.buffer; 458 el->el_line.lastchar = el->el_line.buffer; 459 el->el_line.limit = &el->el_line.buffer[EL_BUFSIZ - EL_LEAVE]; 460 461 el->el_chared.c_undo.buf = (char *) el_malloc(EL_BUFSIZ); 462 if (el->el_chared.c_undo.buf == NULL) 463 return (-1); 464 (void) memset(el->el_chared.c_undo.buf, 0, EL_BUFSIZ); 465 el->el_chared.c_undo.len = -1; 466 el->el_chared.c_undo.cursor = 0; 467 el->el_chared.c_redo.buf = (char *) el_malloc(EL_BUFSIZ); 468 if (el->el_chared.c_redo.buf == NULL) 469 return (-1); 470 el->el_chared.c_redo.pos = el->el_chared.c_redo.buf; 471 el->el_chared.c_redo.lim = el->el_chared.c_redo.buf + EL_BUFSIZ; 472 el->el_chared.c_redo.cmd = ED_UNASSIGNED; 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.buf = (char *) el_malloc(EL_BUFSIZ); 478 if (el->el_chared.c_kill.buf == NULL) 479 return (-1); 480 (void) memset(el->el_chared.c_kill.buf, 0, EL_BUFSIZ); 481 el->el_chared.c_kill.mark = el->el_line.buffer; 482 el->el_chared.c_kill.last = el->el_chared.c_kill.buf; 483 484 el->el_map.current = el->el_map.key; 485 486 el->el_state.inputmode = MODE_INSERT; /* XXX: save a default */ 487 el->el_state.doingarg = 0; 488 el->el_state.metanext = 0; 489 el->el_state.argument = 1; 490 el->el_state.lastcmd = ED_UNASSIGNED; 491 492 ma->level = -1; 493 ma->offset = 0; 494 ma->macro = (char **) el_malloc(EL_MAXMACRO * sizeof(char *)); 495 if (ma->macro == NULL) 496 return (-1); 497 return (0); 498} 499 500/* ch_reset(): 501 * Reset the character editor 502 */ 503protected void 504ch_reset(EditLine *el, int mclear) 505{ 506 el->el_line.cursor = el->el_line.buffer; 507 el->el_line.lastchar = el->el_line.buffer; 508 509 el->el_chared.c_undo.len = -1; 510 el->el_chared.c_undo.cursor = 0; 511 512 el->el_chared.c_vcmd.action = NOP; 513 el->el_chared.c_vcmd.pos = el->el_line.buffer; 514 515 el->el_chared.c_kill.mark = el->el_line.buffer; 516 517 el->el_map.current = el->el_map.key; 518 519 el->el_state.inputmode = MODE_INSERT; /* XXX: save a default */ 520 el->el_state.doingarg = 0; 521 el->el_state.metanext = 0; 522 el->el_state.argument = 1; 523 el->el_state.lastcmd = ED_UNASSIGNED; 524 525 el->el_history.eventno = 0; 526 527 if (mclear) 528 ch__clearmacro(el); 529} 530 531private void 532ch__clearmacro(EditLine *el) 533{ 534 c_macro_t *ma = &el->el_chared.c_macro; 535 while (ma->level >= 0) 536 el_free((ptr_t)ma->macro[ma->level--]); 537} 538 539/* ch_enlargebufs(): 540 * Enlarge line buffer to be able to hold twice as much characters. 541 * Returns 1 if successful, 0 if not. 542 */ 543protected int 544ch_enlargebufs(EditLine *el, size_t addlen) 545{ 546 size_t sz, newsz; 547 char *newbuffer, *oldbuf, *oldkbuf; 548 549 sz = el->el_line.limit - el->el_line.buffer + EL_LEAVE; 550 newsz = sz * 2; 551 /* 552 * If newly required length is longer than current buffer, we need 553 * to make the buffer big enough to hold both old and new stuff. 554 */ 555 if (addlen > sz) { 556 while(newsz - sz < addlen) 557 newsz *= 2; 558 } 559 560 /* 561 * Reallocate line buffer. 562 */ 563 newbuffer = el_realloc(el->el_line.buffer, newsz); 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); 569 570 oldbuf = el->el_line.buffer; 571 572 el->el_line.buffer = newbuffer; 573 el->el_line.cursor = newbuffer + (el->el_line.cursor - oldbuf); 574 el->el_line.lastchar = newbuffer + (el->el_line.lastchar - oldbuf); 575 /* don't set new size until all buffers are enlarged */ 576 el->el_line.limit = &newbuffer[sz - EL_LEAVE]; 577 578 /* 579 * Reallocate kill buffer. 580 */ 581 newbuffer = el_realloc(el->el_chared.c_kill.buf, newsz); 582 if (!newbuffer) 583 return 0; 584 585 /* zero the newly added memory, leave old data in */ 586 (void) memset(&newbuffer[sz], 0, newsz - sz); 587 588 oldkbuf = el->el_chared.c_kill.buf; 589 590 el->el_chared.c_kill.buf = newbuffer; 591 el->el_chared.c_kill.last = newbuffer + 592 (el->el_chared.c_kill.last - oldkbuf); 593 el->el_chared.c_kill.mark = el->el_line.buffer + 594 (el->el_chared.c_kill.mark - oldbuf); 595 596 /* 597 * Reallocate undo buffer. 598 */ 599 newbuffer = el_realloc(el->el_chared.c_undo.buf, newsz); 600 if (!newbuffer) 601 return 0; 602 603 /* zero the newly added memory, leave old data in */ 604 (void) memset(&newbuffer[sz], 0, newsz - sz); 605 el->el_chared.c_undo.buf = newbuffer; 606 607 newbuffer = el_realloc(el->el_chared.c_redo.buf, newsz); 608 if (!newbuffer) 609 return 0; 610 el->el_chared.c_redo.pos = newbuffer + 611 (el->el_chared.c_redo.pos - el->el_chared.c_redo.buf); 612 el->el_chared.c_redo.lim = newbuffer + 613 (el->el_chared.c_redo.lim - el->el_chared.c_redo.buf); 614 el->el_chared.c_redo.buf = newbuffer; 615 616 if (!hist_enlargebuf(el, sz, newsz)) 617 return 0; 618 619 /* Safe to set enlarged buffer size */ 620 el->el_line.limit = &el->el_line.buffer[newsz - EL_LEAVE]; 621 return 1; 622} 623 624/* ch_end(): 625 * Free the data structures used by the editor 626 */ 627protected void 628ch_end(EditLine *el) 629{ 630 el_free((ptr_t) el->el_line.buffer); 631 el->el_line.buffer = NULL; 632 el->el_line.limit = NULL; 633 el_free((ptr_t) el->el_chared.c_undo.buf); 634 el->el_chared.c_undo.buf = NULL; 635 el_free((ptr_t) el->el_chared.c_redo.buf); 636 el->el_chared.c_redo.buf = NULL; 637 el->el_chared.c_redo.pos = NULL; 638 el->el_chared.c_redo.lim = NULL; 639 el->el_chared.c_redo.cmd = ED_UNASSIGNED; 640 el_free((ptr_t) el->el_chared.c_kill.buf); 641 el->el_chared.c_kill.buf = NULL; 642 ch_reset(el, 1); 643 el_free((ptr_t) el->el_chared.c_macro.macro); 644 el->el_chared.c_macro.macro = NULL; 645} 646 647 648/* el_insertstr(): 649 * Insert string at cursorI 650 */ 651public int 652el_insertstr(EditLine *el, const char *s) 653{ 654 size_t len; 655 656 if ((len = strlen(s)) == 0) 657 return (-1); 658 if (el->el_line.lastchar + len >= el->el_line.limit) { 659 if (!ch_enlargebufs(el, len)) 660 return (-1); 661 } 662 663 c_insert(el, (int)len); 664 while (*s) 665 *el->el_line.cursor++ = *s++; 666 return (0); 667} 668 669 670/* el_deletestr(): 671 * Delete num characters before the cursor 672 */ 673public void 674el_deletestr(EditLine *el, int n) 675{ 676 if (n <= 0) 677 return; 678 679 if (el->el_line.cursor < &el->el_line.buffer[n]) 680 return; 681 682 c_delbefore(el, n); /* delete before dot */ 683 el->el_line.cursor -= n; 684 if (el->el_line.cursor < el->el_line.buffer) 685 el->el_line.cursor = el->el_line.buffer; 686} 687 688/* c_gets(): 689 * Get a string 690 */ 691protected int 692c_gets(EditLine *el, char *buf, const char *prompt) 693{ 694 char ch; 695 ssize_t len; 696 char *cp = el->el_line.buffer; 697 698 if (prompt) { 699 len = strlen(prompt); 700 memcpy(cp, prompt, (size_t)len); 701 cp += len; 702 } 703 len = 0; 704 705 for (;;) { 706 el->el_line.cursor = cp; 707 *cp = ' '; 708 el->el_line.lastchar = cp + 1; 709 re_refresh(el); 710 711 if (el_getc(el, &ch) != 1) { 712 ed_end_of_file(el, 0); 713 len = -1; 714 break; 715 } 716 717 switch (ch) { 718 719 case '\010': /* Delete and backspace */ 720 case '\177': 721 if (len == 0) { 722 len = -1; 723 break; 724 } 725 cp--; 726 continue; 727 728 case '\033': /* ESC */ 729 case '\r': /* Newline */ 730 case '\n': 731 buf[len] = ch; 732 break; 733 734 default: 735 if (len >= EL_BUFSIZ - 16) 736 term_beep(el); 737 else { 738 buf[len++] = ch; 739 *cp++ = ch; 740 } 741 continue; 742 } 743 break; 744 } 745 746 el->el_line.buffer[0] = '\0'; 747 el->el_line.lastchar = el->el_line.buffer; 748 el->el_line.cursor = el->el_line.buffer; 749 return (int)len; 750} 751 752 753/* c_hpos(): 754 * Return the current horizontal position of the cursor 755 */ 756protected int 757c_hpos(EditLine *el) 758{ 759 char *ptr; 760 761 /* 762 * Find how many characters till the beginning of this line. 763 */ 764 if (el->el_line.cursor == el->el_line.buffer) 765 return (0); 766 else { 767 for (ptr = el->el_line.cursor - 1; 768 ptr >= el->el_line.buffer && *ptr != '\n'; 769 ptr--) 770 continue; 771 return (int)(el->el_line.cursor - ptr - 1); 772 } 773} 774