1 /* $NetBSD: search.c,v 1.49 2019/07/23 10:18:52 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[] = "@(#)search.c 8.1 (Berkeley) 6/4/93"; 39 #else 40 __RCSID("$NetBSD: search.c,v 1.49 2019/07/23 10:18:52 christos Exp $"); 41 #endif 42 #endif /* not lint && not SCCSID */ 43 44 /* 45 * search.c: History and character search functions 46 */ 47 #include <stdlib.h> 48 #include <string.h> 49 #if defined(REGEX) 50 #include <regex.h> 51 #elif defined(REGEXP) 52 #include <regexp.h> 53 #endif 54 55 #include "el.h" 56 #include "common.h" 57 #include "fcns.h" 58 59 /* 60 * Adjust cursor in vi mode to include the character under it 61 */ 62 #define EL_CURSOR(el) \ 63 ((el)->el_line.cursor + (((el)->el_map.type == MAP_VI) && \ 64 ((el)->el_map.current == (el)->el_map.alt))) 65 66 /* search_init(): 67 * Initialize the search stuff 68 */ 69 libedit_private int 70 search_init(EditLine *el) 71 { 72 73 el->el_search.patbuf = el_calloc(EL_BUFSIZ, 74 sizeof(*el->el_search.patbuf)); 75 if (el->el_search.patbuf == NULL) 76 return -1; 77 el->el_search.patbuf[0] = L'\0'; 78 el->el_search.patlen = 0; 79 el->el_search.patdir = -1; 80 el->el_search.chacha = L'\0'; 81 el->el_search.chadir = CHAR_FWD; 82 el->el_search.chatflg = 0; 83 return 0; 84 } 85 86 87 /* search_end(): 88 * Initialize the search stuff 89 */ 90 libedit_private void 91 search_end(EditLine *el) 92 { 93 94 el_free(el->el_search.patbuf); 95 el->el_search.patbuf = NULL; 96 } 97 98 99 #ifdef REGEXP 100 /* regerror(): 101 * Handle regular expression errors 102 */ 103 void 104 /*ARGSUSED*/ 105 regerror(const char *msg) 106 { 107 } 108 #endif 109 110 111 /* el_match(): 112 * Return if string matches pattern 113 */ 114 libedit_private int 115 el_match(const wchar_t *str, const wchar_t *pat) 116 { 117 static ct_buffer_t conv; 118 #if defined (REGEX) 119 regex_t re; 120 int rv; 121 #elif defined (REGEXP) 122 regexp *rp; 123 int rv; 124 #else 125 extern char *re_comp(const char *); 126 extern int re_exec(const char *); 127 #endif 128 129 if (wcsstr(str, pat) != 0) 130 return 1; 131 132 #if defined(REGEX) 133 if (regcomp(&re, ct_encode_string(pat, &conv), 0) == 0) { 134 rv = regexec(&re, ct_encode_string(str, &conv), (size_t)0, NULL, 135 0) == 0; 136 regfree(&re); 137 } else { 138 rv = 0; 139 } 140 return rv; 141 #elif defined(REGEXP) 142 if ((re = regcomp(ct_encode_string(pat, &conv))) != NULL) { 143 rv = regexec(re, ct_encode_string(str, &conv)); 144 el_free(re); 145 } else { 146 rv = 0; 147 } 148 return rv; 149 #else 150 if (re_comp(ct_encode_string(pat, &conv)) != NULL) 151 return 0; 152 else 153 return re_exec(ct_encode_string(str, &conv)) == 1; 154 #endif 155 } 156 157 158 /* c_hmatch(): 159 * return True if the pattern matches the prefix 160 */ 161 libedit_private int 162 c_hmatch(EditLine *el, const wchar_t *str) 163 { 164 #ifdef SDEBUG 165 (void) fprintf(el->el_errfile, "match `%s' with `%s'\n", 166 el->el_search.patbuf, str); 167 #endif /* SDEBUG */ 168 169 return el_match(str, el->el_search.patbuf); 170 } 171 172 173 /* c_setpat(): 174 * Set the history seatch pattern 175 */ 176 libedit_private void 177 c_setpat(EditLine *el) 178 { 179 if (el->el_state.lastcmd != ED_SEARCH_PREV_HISTORY && 180 el->el_state.lastcmd != ED_SEARCH_NEXT_HISTORY) { 181 el->el_search.patlen = 182 (size_t)(EL_CURSOR(el) - el->el_line.buffer); 183 if (el->el_search.patlen >= EL_BUFSIZ) 184 el->el_search.patlen = EL_BUFSIZ - 1; 185 if (el->el_search.patlen != 0) { 186 (void) wcsncpy(el->el_search.patbuf, el->el_line.buffer, 187 el->el_search.patlen); 188 el->el_search.patbuf[el->el_search.patlen] = '\0'; 189 } else 190 el->el_search.patlen = wcslen(el->el_search.patbuf); 191 } 192 #ifdef SDEBUG 193 (void) fprintf(el->el_errfile, "\neventno = %d\n", 194 el->el_history.eventno); 195 (void) fprintf(el->el_errfile, "patlen = %d\n", el->el_search.patlen); 196 (void) fprintf(el->el_errfile, "patbuf = \"%s\"\n", 197 el->el_search.patbuf); 198 (void) fprintf(el->el_errfile, "cursor %d lastchar %d\n", 199 EL_CURSOR(el) - el->el_line.buffer, 200 el->el_line.lastchar - el->el_line.buffer); 201 #endif 202 } 203 204 205 /* ce_inc_search(): 206 * Emacs incremental search 207 */ 208 libedit_private el_action_t 209 ce_inc_search(EditLine *el, int dir) 210 { 211 static const wchar_t STRfwd[] = L"fwd", STRbck[] = L"bck"; 212 static wchar_t pchar = L':'; /* ':' = normal, '?' = failed */ 213 static wchar_t endcmd[2] = {'\0', '\0'}; 214 wchar_t *ocursor = el->el_line.cursor, oldpchar = pchar, ch; 215 const wchar_t *cp; 216 217 el_action_t ret = CC_NORM; 218 219 int ohisteventno = el->el_history.eventno; 220 size_t oldpatlen = el->el_search.patlen; 221 int newdir = dir; 222 int done, redo; 223 224 if (el->el_line.lastchar + sizeof(STRfwd) / 225 sizeof(*el->el_line.lastchar) + 2 + 226 el->el_search.patlen >= el->el_line.limit) 227 return CC_ERROR; 228 229 for (;;) { 230 231 if (el->el_search.patlen == 0) { /* first round */ 232 pchar = ':'; 233 #ifdef ANCHOR 234 #define LEN 2 235 el->el_search.patbuf[el->el_search.patlen++] = '.'; 236 el->el_search.patbuf[el->el_search.patlen++] = '*'; 237 #else 238 #define LEN 0 239 #endif 240 } 241 done = redo = 0; 242 *el->el_line.lastchar++ = '\n'; 243 for (cp = (newdir == ED_SEARCH_PREV_HISTORY) ? STRbck : STRfwd; 244 *cp; *el->el_line.lastchar++ = *cp++) 245 continue; 246 *el->el_line.lastchar++ = pchar; 247 for (cp = &el->el_search.patbuf[LEN]; 248 cp < &el->el_search.patbuf[el->el_search.patlen]; 249 *el->el_line.lastchar++ = *cp++) 250 continue; 251 *el->el_line.lastchar = '\0'; 252 re_refresh(el); 253 254 if (el_wgetc(el, &ch) != 1) 255 return ed_end_of_file(el, 0); 256 257 switch (el->el_map.current[(unsigned char) ch]) { 258 case ED_INSERT: 259 case ED_DIGIT: 260 if (el->el_search.patlen >= EL_BUFSIZ - LEN) 261 terminal_beep(el); 262 else { 263 el->el_search.patbuf[el->el_search.patlen++] = 264 ch; 265 *el->el_line.lastchar++ = ch; 266 *el->el_line.lastchar = '\0'; 267 re_refresh(el); 268 } 269 break; 270 271 case EM_INC_SEARCH_NEXT: 272 newdir = ED_SEARCH_NEXT_HISTORY; 273 redo++; 274 break; 275 276 case EM_INC_SEARCH_PREV: 277 newdir = ED_SEARCH_PREV_HISTORY; 278 redo++; 279 break; 280 281 case EM_DELETE_PREV_CHAR: 282 case ED_DELETE_PREV_CHAR: 283 if (el->el_search.patlen > LEN) 284 done++; 285 else 286 terminal_beep(el); 287 break; 288 289 default: 290 switch (ch) { 291 case 0007: /* ^G: Abort */ 292 ret = CC_ERROR; 293 done++; 294 break; 295 296 case 0027: /* ^W: Append word */ 297 /* No can do if globbing characters in pattern */ 298 for (cp = &el->el_search.patbuf[LEN];; cp++) 299 if (cp >= &el->el_search.patbuf[ 300 el->el_search.patlen]) { 301 el->el_line.cursor += 302 el->el_search.patlen - LEN - 1; 303 cp = c__next_word(el->el_line.cursor, 304 el->el_line.lastchar, 1, 305 ce__isword); 306 while (el->el_line.cursor < cp && 307 *el->el_line.cursor != '\n') { 308 if (el->el_search.patlen >= 309 EL_BUFSIZ - LEN) { 310 terminal_beep(el); 311 break; 312 } 313 el->el_search.patbuf[el->el_search.patlen++] = 314 *el->el_line.cursor; 315 *el->el_line.lastchar++ = 316 *el->el_line.cursor++; 317 } 318 el->el_line.cursor = ocursor; 319 *el->el_line.lastchar = '\0'; 320 re_refresh(el); 321 break; 322 } else if (isglob(*cp)) { 323 terminal_beep(el); 324 break; 325 } 326 break; 327 328 default: /* Terminate and execute cmd */ 329 endcmd[0] = ch; 330 el_wpush(el, endcmd); 331 /* FALLTHROUGH */ 332 333 case 0033: /* ESC: Terminate */ 334 ret = CC_REFRESH; 335 done++; 336 break; 337 } 338 break; 339 } 340 341 while (el->el_line.lastchar > el->el_line.buffer && 342 *el->el_line.lastchar != '\n') 343 *el->el_line.lastchar-- = '\0'; 344 *el->el_line.lastchar = '\0'; 345 346 if (!done) { 347 348 /* Can't search if unmatched '[' */ 349 for (cp = &el->el_search.patbuf[el->el_search.patlen-1], 350 ch = L']'; 351 cp >= &el->el_search.patbuf[LEN]; 352 cp--) 353 if (*cp == '[' || *cp == ']') { 354 ch = *cp; 355 break; 356 } 357 if (el->el_search.patlen > LEN && ch != L'[') { 358 if (redo && newdir == dir) { 359 if (pchar == '?') { /* wrap around */ 360 el->el_history.eventno = 361 newdir == ED_SEARCH_PREV_HISTORY ? 0 : 0x7fffffff; 362 if (hist_get(el) == CC_ERROR) 363 /* el->el_history.event 364 * no was fixed by 365 * first call */ 366 (void) hist_get(el); 367 el->el_line.cursor = newdir == 368 ED_SEARCH_PREV_HISTORY ? 369 el->el_line.lastchar : 370 el->el_line.buffer; 371 } else 372 el->el_line.cursor += 373 newdir == 374 ED_SEARCH_PREV_HISTORY ? 375 -1 : 1; 376 } 377 #ifdef ANCHOR 378 el->el_search.patbuf[el->el_search.patlen++] = 379 '.'; 380 el->el_search.patbuf[el->el_search.patlen++] = 381 '*'; 382 #endif 383 el->el_search.patbuf[el->el_search.patlen] = 384 '\0'; 385 if (el->el_line.cursor < el->el_line.buffer || 386 el->el_line.cursor > el->el_line.lastchar || 387 (ret = ce_search_line(el, newdir)) 388 == CC_ERROR) { 389 /* avoid c_setpat */ 390 el->el_state.lastcmd = 391 (el_action_t) newdir; 392 ret = (el_action_t) 393 (newdir == ED_SEARCH_PREV_HISTORY ? 394 ed_search_prev_history(el, 0) : 395 ed_search_next_history(el, 0)); 396 if (ret != CC_ERROR) { 397 el->el_line.cursor = newdir == 398 ED_SEARCH_PREV_HISTORY ? 399 el->el_line.lastchar : 400 el->el_line.buffer; 401 (void) ce_search_line(el, 402 newdir); 403 } 404 } 405 el->el_search.patlen -= LEN; 406 el->el_search.patbuf[el->el_search.patlen] = 407 '\0'; 408 if (ret == CC_ERROR) { 409 terminal_beep(el); 410 if (el->el_history.eventno != 411 ohisteventno) { 412 el->el_history.eventno = 413 ohisteventno; 414 if (hist_get(el) == CC_ERROR) 415 return CC_ERROR; 416 } 417 el->el_line.cursor = ocursor; 418 pchar = '?'; 419 } else { 420 pchar = ':'; 421 } 422 } 423 ret = ce_inc_search(el, newdir); 424 425 if (ret == CC_ERROR && pchar == '?' && oldpchar == ':') 426 /* 427 * break abort of failed search at last 428 * non-failed 429 */ 430 ret = CC_NORM; 431 432 } 433 if (ret == CC_NORM || (ret == CC_ERROR && oldpatlen == 0)) { 434 /* restore on normal return or error exit */ 435 pchar = oldpchar; 436 el->el_search.patlen = oldpatlen; 437 if (el->el_history.eventno != ohisteventno) { 438 el->el_history.eventno = ohisteventno; 439 if (hist_get(el) == CC_ERROR) 440 return CC_ERROR; 441 } 442 el->el_line.cursor = ocursor; 443 if (ret == CC_ERROR) 444 re_refresh(el); 445 } 446 if (done || ret != CC_NORM) 447 return ret; 448 } 449 } 450 451 452 /* cv_search(): 453 * Vi search. 454 */ 455 libedit_private el_action_t 456 cv_search(EditLine *el, int dir) 457 { 458 wchar_t ch; 459 wchar_t tmpbuf[EL_BUFSIZ]; 460 ssize_t tmplen; 461 462 #ifdef ANCHOR 463 tmpbuf[0] = '.'; 464 tmpbuf[1] = '*'; 465 #endif 466 tmplen = LEN; 467 468 el->el_search.patdir = dir; 469 470 tmplen = c_gets(el, &tmpbuf[LEN], 471 dir == ED_SEARCH_PREV_HISTORY ? L"\n/" : L"\n?" ); 472 if (tmplen == -1) 473 return CC_REFRESH; 474 475 tmplen += LEN; 476 ch = tmpbuf[tmplen]; 477 tmpbuf[tmplen] = '\0'; 478 479 if (tmplen == LEN) { 480 /* 481 * Use the old pattern, but wild-card it. 482 */ 483 if (el->el_search.patlen == 0) { 484 re_refresh(el); 485 return CC_ERROR; 486 } 487 #ifdef ANCHOR 488 if (el->el_search.patbuf[0] != '.' && 489 el->el_search.patbuf[0] != '*') { 490 (void) wcsncpy(tmpbuf, el->el_search.patbuf, 491 sizeof(tmpbuf) / sizeof(*tmpbuf) - 1); 492 el->el_search.patbuf[0] = '.'; 493 el->el_search.patbuf[1] = '*'; 494 (void) wcsncpy(&el->el_search.patbuf[2], tmpbuf, 495 EL_BUFSIZ - 3); 496 el->el_search.patlen++; 497 el->el_search.patbuf[el->el_search.patlen++] = '.'; 498 el->el_search.patbuf[el->el_search.patlen++] = '*'; 499 el->el_search.patbuf[el->el_search.patlen] = '\0'; 500 } 501 #endif 502 } else { 503 #ifdef ANCHOR 504 tmpbuf[tmplen++] = '.'; 505 tmpbuf[tmplen++] = '*'; 506 #endif 507 tmpbuf[tmplen] = '\0'; 508 (void) wcsncpy(el->el_search.patbuf, tmpbuf, EL_BUFSIZ - 1); 509 el->el_search.patlen = (size_t)tmplen; 510 } 511 el->el_state.lastcmd = (el_action_t) dir; /* avoid c_setpat */ 512 el->el_line.cursor = el->el_line.lastchar = el->el_line.buffer; 513 if ((dir == ED_SEARCH_PREV_HISTORY ? ed_search_prev_history(el, 0) : 514 ed_search_next_history(el, 0)) == CC_ERROR) { 515 re_refresh(el); 516 return CC_ERROR; 517 } 518 if (ch == 0033) { 519 re_refresh(el); 520 return ed_newline(el, 0); 521 } 522 return CC_REFRESH; 523 } 524 525 526 /* ce_search_line(): 527 * Look for a pattern inside a line 528 */ 529 libedit_private el_action_t 530 ce_search_line(EditLine *el, int dir) 531 { 532 wchar_t *cp = el->el_line.cursor; 533 wchar_t *pattern = el->el_search.patbuf; 534 wchar_t oc, *ocp; 535 #ifdef ANCHOR 536 ocp = &pattern[1]; 537 oc = *ocp; 538 *ocp = '^'; 539 #else 540 ocp = pattern; 541 oc = *ocp; 542 #endif 543 544 if (dir == ED_SEARCH_PREV_HISTORY) { 545 for (; cp >= el->el_line.buffer; cp--) { 546 if (el_match(cp, ocp)) { 547 *ocp = oc; 548 el->el_line.cursor = cp; 549 return CC_NORM; 550 } 551 } 552 *ocp = oc; 553 return CC_ERROR; 554 } else { 555 for (; *cp != '\0' && cp < el->el_line.limit; cp++) { 556 if (el_match(cp, ocp)) { 557 *ocp = oc; 558 el->el_line.cursor = cp; 559 return CC_NORM; 560 } 561 } 562 *ocp = oc; 563 return CC_ERROR; 564 } 565 } 566 567 568 /* cv_repeat_srch(): 569 * Vi repeat search 570 */ 571 libedit_private el_action_t 572 cv_repeat_srch(EditLine *el, wint_t c) 573 { 574 575 #ifdef SDEBUG 576 (void) fprintf(el->el_errfile, "dir %d patlen %d patbuf %s\n", 577 c, el->el_search.patlen, ct_encode_string(el->el_search.patbuf)); 578 #endif 579 580 el->el_state.lastcmd = (el_action_t) c; /* Hack to stop c_setpat */ 581 el->el_line.lastchar = el->el_line.buffer; 582 583 switch (c) { 584 case ED_SEARCH_NEXT_HISTORY: 585 return ed_search_next_history(el, 0); 586 case ED_SEARCH_PREV_HISTORY: 587 return ed_search_prev_history(el, 0); 588 default: 589 return CC_ERROR; 590 } 591 } 592 593 594 /* cv_csearch(): 595 * Vi character search 596 */ 597 libedit_private el_action_t 598 cv_csearch(EditLine *el, int direction, wint_t ch, int count, int tflag) 599 { 600 wchar_t *cp; 601 602 if (ch == 0) 603 return CC_ERROR; 604 605 if (ch == (wint_t)-1) { 606 wchar_t c; 607 if (el_wgetc(el, &c) != 1) 608 return ed_end_of_file(el, 0); 609 ch = c; 610 } 611 612 /* Save for ';' and ',' commands */ 613 el->el_search.chacha = ch; 614 el->el_search.chadir = direction; 615 el->el_search.chatflg = (char)tflag; 616 617 cp = el->el_line.cursor; 618 while (count--) { 619 if ((wint_t)*cp == ch) 620 cp += direction; 621 for (;;cp += direction) { 622 if (cp >= el->el_line.lastchar) 623 return CC_ERROR; 624 if (cp < el->el_line.buffer) 625 return CC_ERROR; 626 if ((wint_t)*cp == ch) 627 break; 628 } 629 } 630 631 if (tflag) 632 cp -= direction; 633 634 el->el_line.cursor = cp; 635 636 if (el->el_chared.c_vcmd.action != NOP) { 637 if (direction > 0) 638 el->el_line.cursor++; 639 cv_delfini(el); 640 return CC_REFRESH; 641 } 642 return CC_CURSOR; 643 } 644