1 /* $NetBSD: search.c,v 1.51 2020/03/30 06:56:38 ryo 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 1.51 2020/03/30 06:56:38 ryo 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 `%ls' with `%ls'\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 (void) wcsncpy(el->el_search.patbuf, el->el_line.buffer, 186 el->el_search.patlen); 187 el->el_search.patbuf[el->el_search.patlen] = '\0'; 188 } 189 #ifdef SDEBUG 190 (void) fprintf(el->el_errfile, "\neventno = %d\n", 191 el->el_history.eventno); 192 (void) fprintf(el->el_errfile, "patlen = %ld\n", el->el_search.patlen); 193 (void) fprintf(el->el_errfile, "patbuf = \"%ls\"\n", 194 el->el_search.patbuf); 195 (void) fprintf(el->el_errfile, "cursor %ld lastchar %ld\n", 196 EL_CURSOR(el) - el->el_line.buffer, 197 el->el_line.lastchar - el->el_line.buffer); 198 #endif 199 } 200 201 202 /* ce_inc_search(): 203 * Emacs incremental search 204 */ 205 libedit_private el_action_t 206 ce_inc_search(EditLine *el, int dir) 207 { 208 static const wchar_t STRfwd[] = L"fwd", STRbck[] = L"bck"; 209 static wchar_t pchar = L':'; /* ':' = normal, '?' = failed */ 210 static wchar_t endcmd[2] = {'\0', '\0'}; 211 wchar_t *ocursor = el->el_line.cursor, oldpchar = pchar, ch; 212 const wchar_t *cp; 213 214 el_action_t ret = CC_NORM; 215 216 int ohisteventno = el->el_history.eventno; 217 size_t oldpatlen = el->el_search.patlen; 218 int newdir = dir; 219 int done, redo; 220 221 if (el->el_line.lastchar + sizeof(STRfwd) / 222 sizeof(*el->el_line.lastchar) + 2 + 223 el->el_search.patlen >= el->el_line.limit) 224 return CC_ERROR; 225 226 for (;;) { 227 228 if (el->el_search.patlen == 0) { /* first round */ 229 pchar = ':'; 230 #ifdef ANCHOR 231 #define LEN 2 232 el->el_search.patbuf[el->el_search.patlen++] = '.'; 233 el->el_search.patbuf[el->el_search.patlen++] = '*'; 234 #else 235 #define LEN 0 236 #endif 237 } 238 done = redo = 0; 239 *el->el_line.lastchar++ = '\n'; 240 for (cp = (newdir == ED_SEARCH_PREV_HISTORY) ? STRbck : STRfwd; 241 *cp; *el->el_line.lastchar++ = *cp++) 242 continue; 243 *el->el_line.lastchar++ = pchar; 244 for (cp = &el->el_search.patbuf[LEN]; 245 cp < &el->el_search.patbuf[el->el_search.patlen]; 246 *el->el_line.lastchar++ = *cp++) 247 continue; 248 *el->el_line.lastchar = '\0'; 249 re_refresh(el); 250 251 if (el_wgetc(el, &ch) != 1) 252 return ed_end_of_file(el, 0); 253 254 switch (el->el_map.current[(unsigned char) ch]) { 255 case ED_INSERT: 256 case ED_DIGIT: 257 if (el->el_search.patlen >= EL_BUFSIZ - LEN) 258 terminal_beep(el); 259 else { 260 el->el_search.patbuf[el->el_search.patlen++] = 261 ch; 262 *el->el_line.lastchar++ = ch; 263 *el->el_line.lastchar = '\0'; 264 re_refresh(el); 265 } 266 break; 267 268 case EM_INC_SEARCH_NEXT: 269 newdir = ED_SEARCH_NEXT_HISTORY; 270 redo++; 271 break; 272 273 case EM_INC_SEARCH_PREV: 274 newdir = ED_SEARCH_PREV_HISTORY; 275 redo++; 276 break; 277 278 case EM_DELETE_PREV_CHAR: 279 case ED_DELETE_PREV_CHAR: 280 if (el->el_search.patlen > LEN) 281 done++; 282 else 283 terminal_beep(el); 284 break; 285 286 default: 287 switch (ch) { 288 case 0007: /* ^G: Abort */ 289 ret = CC_ERROR; 290 done++; 291 break; 292 293 case 0027: /* ^W: Append word */ 294 /* No can do if globbing characters in pattern */ 295 for (cp = &el->el_search.patbuf[LEN];; cp++) 296 if (cp >= &el->el_search.patbuf[ 297 el->el_search.patlen]) { 298 el->el_line.cursor += 299 el->el_search.patlen - LEN - 1; 300 cp = c__next_word(el->el_line.cursor, 301 el->el_line.lastchar, 1, 302 ce__isword); 303 while (el->el_line.cursor < cp && 304 *el->el_line.cursor != '\n') { 305 if (el->el_search.patlen >= 306 EL_BUFSIZ - LEN) { 307 terminal_beep(el); 308 break; 309 } 310 el->el_search.patbuf[el->el_search.patlen++] = 311 *el->el_line.cursor; 312 *el->el_line.lastchar++ = 313 *el->el_line.cursor++; 314 } 315 el->el_line.cursor = ocursor; 316 *el->el_line.lastchar = '\0'; 317 re_refresh(el); 318 break; 319 } else if (isglob(*cp)) { 320 terminal_beep(el); 321 break; 322 } 323 break; 324 325 default: /* Terminate and execute cmd */ 326 endcmd[0] = ch; 327 el_wpush(el, endcmd); 328 /* FALLTHROUGH */ 329 330 case 0033: /* ESC: Terminate */ 331 ret = CC_REFRESH; 332 done++; 333 break; 334 } 335 break; 336 } 337 338 while (el->el_line.lastchar > el->el_line.buffer && 339 *el->el_line.lastchar != '\n') 340 *el->el_line.lastchar-- = '\0'; 341 *el->el_line.lastchar = '\0'; 342 343 if (!done) { 344 345 /* Can't search if unmatched '[' */ 346 for (cp = &el->el_search.patbuf[el->el_search.patlen-1], 347 ch = L']'; 348 cp >= &el->el_search.patbuf[LEN]; 349 cp--) 350 if (*cp == '[' || *cp == ']') { 351 ch = *cp; 352 break; 353 } 354 if (el->el_search.patlen > LEN && ch != L'[') { 355 if (redo && newdir == dir) { 356 if (pchar == '?') { /* wrap around */ 357 el->el_history.eventno = 358 newdir == ED_SEARCH_PREV_HISTORY ? 0 : 0x7fffffff; 359 if (hist_get(el) == CC_ERROR) 360 /* el->el_history.event 361 * no was fixed by 362 * first call */ 363 (void) hist_get(el); 364 el->el_line.cursor = newdir == 365 ED_SEARCH_PREV_HISTORY ? 366 el->el_line.lastchar : 367 el->el_line.buffer; 368 } else 369 el->el_line.cursor += 370 newdir == 371 ED_SEARCH_PREV_HISTORY ? 372 -1 : 1; 373 } 374 #ifdef ANCHOR 375 el->el_search.patbuf[el->el_search.patlen++] = 376 '.'; 377 el->el_search.patbuf[el->el_search.patlen++] = 378 '*'; 379 #endif 380 el->el_search.patbuf[el->el_search.patlen] = 381 '\0'; 382 if (el->el_line.cursor < el->el_line.buffer || 383 el->el_line.cursor > el->el_line.lastchar || 384 (ret = ce_search_line(el, newdir)) 385 == CC_ERROR) { 386 /* avoid c_setpat */ 387 el->el_state.lastcmd = 388 (el_action_t) newdir; 389 ret = (el_action_t) 390 (newdir == ED_SEARCH_PREV_HISTORY ? 391 ed_search_prev_history(el, 0) : 392 ed_search_next_history(el, 0)); 393 if (ret != CC_ERROR) { 394 el->el_line.cursor = newdir == 395 ED_SEARCH_PREV_HISTORY ? 396 el->el_line.lastchar : 397 el->el_line.buffer; 398 (void) ce_search_line(el, 399 newdir); 400 } 401 } 402 el->el_search.patlen -= LEN; 403 el->el_search.patbuf[el->el_search.patlen] = 404 '\0'; 405 if (ret == CC_ERROR) { 406 terminal_beep(el); 407 if (el->el_history.eventno != 408 ohisteventno) { 409 el->el_history.eventno = 410 ohisteventno; 411 if (hist_get(el) == CC_ERROR) 412 return CC_ERROR; 413 } 414 el->el_line.cursor = ocursor; 415 pchar = '?'; 416 } else { 417 pchar = ':'; 418 } 419 } 420 ret = ce_inc_search(el, newdir); 421 422 if (ret == CC_ERROR && pchar == '?' && oldpchar == ':') 423 /* 424 * break abort of failed search at last 425 * non-failed 426 */ 427 ret = CC_NORM; 428 429 } 430 if (ret == CC_NORM || (ret == CC_ERROR && oldpatlen == 0)) { 431 /* restore on normal return or error exit */ 432 pchar = oldpchar; 433 el->el_search.patlen = oldpatlen; 434 if (el->el_history.eventno != ohisteventno) { 435 el->el_history.eventno = ohisteventno; 436 if (hist_get(el) == CC_ERROR) 437 return CC_ERROR; 438 } 439 el->el_line.cursor = ocursor; 440 if (ret == CC_ERROR) 441 re_refresh(el); 442 } 443 if (done || ret != CC_NORM) 444 return ret; 445 } 446 } 447 448 449 /* cv_search(): 450 * Vi search. 451 */ 452 libedit_private el_action_t 453 cv_search(EditLine *el, int dir) 454 { 455 wchar_t ch; 456 wchar_t tmpbuf[EL_BUFSIZ]; 457 ssize_t tmplen; 458 459 #ifdef ANCHOR 460 tmpbuf[0] = '.'; 461 tmpbuf[1] = '*'; 462 #endif 463 tmplen = LEN; 464 465 el->el_search.patdir = dir; 466 467 tmplen = c_gets(el, &tmpbuf[LEN], 468 dir == ED_SEARCH_PREV_HISTORY ? L"\n/" : L"\n?" ); 469 if (tmplen == -1) 470 return CC_REFRESH; 471 472 tmplen += LEN; 473 ch = tmpbuf[tmplen]; 474 tmpbuf[tmplen] = '\0'; 475 476 if (tmplen == LEN) { 477 /* 478 * Use the old pattern, but wild-card it. 479 */ 480 if (el->el_search.patlen == 0) { 481 re_refresh(el); 482 return CC_ERROR; 483 } 484 #ifdef ANCHOR 485 if (el->el_search.patbuf[0] != '.' && 486 el->el_search.patbuf[0] != '*') { 487 (void) wcsncpy(tmpbuf, el->el_search.patbuf, 488 sizeof(tmpbuf) / sizeof(*tmpbuf) - 1); 489 el->el_search.patbuf[0] = '.'; 490 el->el_search.patbuf[1] = '*'; 491 (void) wcsncpy(&el->el_search.patbuf[2], tmpbuf, 492 EL_BUFSIZ - 3); 493 el->el_search.patlen++; 494 el->el_search.patbuf[el->el_search.patlen++] = '.'; 495 el->el_search.patbuf[el->el_search.patlen++] = '*'; 496 el->el_search.patbuf[el->el_search.patlen] = '\0'; 497 } 498 #endif 499 } else { 500 #ifdef ANCHOR 501 tmpbuf[tmplen++] = '.'; 502 tmpbuf[tmplen++] = '*'; 503 #endif 504 tmpbuf[tmplen] = '\0'; 505 (void) wcsncpy(el->el_search.patbuf, tmpbuf, EL_BUFSIZ - 1); 506 el->el_search.patlen = (size_t)tmplen; 507 } 508 el->el_state.lastcmd = (el_action_t) dir; /* avoid c_setpat */ 509 el->el_line.cursor = el->el_line.lastchar = el->el_line.buffer; 510 if ((dir == ED_SEARCH_PREV_HISTORY ? ed_search_prev_history(el, 0) : 511 ed_search_next_history(el, 0)) == CC_ERROR) { 512 re_refresh(el); 513 return CC_ERROR; 514 } 515 if (ch == 0033) { 516 re_refresh(el); 517 return ed_newline(el, 0); 518 } 519 return CC_REFRESH; 520 } 521 522 523 /* ce_search_line(): 524 * Look for a pattern inside a line 525 */ 526 libedit_private el_action_t 527 ce_search_line(EditLine *el, int dir) 528 { 529 wchar_t *cp = el->el_line.cursor; 530 wchar_t *pattern = el->el_search.patbuf; 531 wchar_t oc, *ocp; 532 #ifdef ANCHOR 533 ocp = &pattern[1]; 534 oc = *ocp; 535 *ocp = '^'; 536 #else 537 ocp = pattern; 538 oc = *ocp; 539 #endif 540 541 if (dir == ED_SEARCH_PREV_HISTORY) { 542 for (; cp >= el->el_line.buffer; cp--) { 543 if (el_match(cp, ocp)) { 544 *ocp = oc; 545 el->el_line.cursor = cp; 546 return CC_NORM; 547 } 548 } 549 *ocp = oc; 550 return CC_ERROR; 551 } else { 552 for (; *cp != '\0' && cp < el->el_line.limit; cp++) { 553 if (el_match(cp, ocp)) { 554 *ocp = oc; 555 el->el_line.cursor = cp; 556 return CC_NORM; 557 } 558 } 559 *ocp = oc; 560 return CC_ERROR; 561 } 562 } 563 564 565 /* cv_repeat_srch(): 566 * Vi repeat search 567 */ 568 libedit_private el_action_t 569 cv_repeat_srch(EditLine *el, wint_t c) 570 { 571 572 #ifdef SDEBUG 573 static ct_buffer_t conv; 574 (void) fprintf(el->el_errfile, "dir %d patlen %ld patbuf %s\n", 575 c, el->el_search.patlen, ct_encode_string(el->el_search.patbuf, &conv)); 576 #endif 577 578 el->el_state.lastcmd = (el_action_t) c; /* Hack to stop c_setpat */ 579 el->el_line.lastchar = el->el_line.buffer; 580 581 switch (c) { 582 case ED_SEARCH_NEXT_HISTORY: 583 return ed_search_next_history(el, 0); 584 case ED_SEARCH_PREV_HISTORY: 585 return ed_search_prev_history(el, 0); 586 default: 587 return CC_ERROR; 588 } 589 } 590 591 592 /* cv_csearch(): 593 * Vi character search 594 */ 595 libedit_private el_action_t 596 cv_csearch(EditLine *el, int direction, wint_t ch, int count, int tflag) 597 { 598 wchar_t *cp; 599 600 if (ch == 0) 601 return CC_ERROR; 602 603 if (ch == (wint_t)-1) { 604 wchar_t c; 605 if (el_wgetc(el, &c) != 1) 606 return ed_end_of_file(el, 0); 607 ch = c; 608 } 609 610 /* Save for ';' and ',' commands */ 611 el->el_search.chacha = ch; 612 el->el_search.chadir = direction; 613 el->el_search.chatflg = (char)tflag; 614 615 cp = el->el_line.cursor; 616 while (count--) { 617 if ((wint_t)*cp == ch) 618 cp += direction; 619 for (;;cp += direction) { 620 if (cp >= el->el_line.lastchar) 621 return CC_ERROR; 622 if (cp < el->el_line.buffer) 623 return CC_ERROR; 624 if ((wint_t)*cp == ch) 625 break; 626 } 627 } 628 629 if (tflag) 630 cp -= direction; 631 632 el->el_line.cursor = cp; 633 634 if (el->el_chared.c_vcmd.action != NOP) { 635 if (direction > 0) 636 el->el_line.cursor++; 637 cv_delfini(el); 638 return CC_REFRESH; 639 } 640 return CC_CURSOR; 641 } 642