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
search_init(EditLine * el)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
search_end(EditLine * el)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*/
regerror(const char * msg)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
el_match(const wchar_t * str,const wchar_t * pat)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
c_hmatch(EditLine * el,const wchar_t * str)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
c_setpat(EditLine * el)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
ce_inc_search(EditLine * el,int dir)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
cv_search(EditLine * el,int dir)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
ce_search_line(EditLine * el,int dir)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
cv_repeat_srch(EditLine * el,wint_t c)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
cv_csearch(EditLine * el,int direction,wint_t ch,int count,int tflag)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