1 /* $NetBSD: search.c,v 1.51 2020/03/30 06:56:38 ryo Exp $ */
4 * Copyright (c) 1992, 1993
5 * The Regents of the University of California. All rights reserved.
7 * This code is derived from software contributed to Berkeley by
8 * Christos Zoulas of Cornell University.
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
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.
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
36 #if !defined(lint) && !defined(SCCSID)
38 static char sccsid[] = "@(#)search.c 8.1 (Berkeley) 6/4/93";
40 __RCSID("$NetBSD: search.c,v 1.51 2020/03/30 06:56:38 ryo Exp $");
42 #endif /* not lint && not SCCSID */
45 * search.c: History and character search functions
60 * Adjust cursor in vi mode to include the character under it
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)))
67 * Initialize the search stuff
70 search_init(EditLine *el)
73 el->el_search.patbuf = el_calloc(EL_BUFSIZ,
74 sizeof(*el->el_search.patbuf));
75 if (el->el_search.patbuf == NULL)
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;
88 * Initialize the search stuff
91 search_end(EditLine *el)
94 el_free(el->el_search.patbuf);
95 el->el_search.patbuf = NULL;
101 * Handle regular expression errors
105 regerror(const char *msg)
112 * Return if string matches pattern
115 el_match(const wchar_t *str, const wchar_t *pat)
117 static ct_buffer_t conv;
121 #elif defined (REGEXP)
125 extern char *re_comp(const char *);
126 extern int re_exec(const char *);
129 if (wcsstr(str, pat) != 0)
133 if (regcomp(&re, ct_encode_string(pat, &conv), 0) == 0) {
134 rv = regexec(&re, ct_encode_string(str, &conv), (size_t)0, NULL,
141 #elif defined(REGEXP)
142 if ((re = regcomp(ct_encode_string(pat, &conv))) != NULL) {
143 rv = regexec(re, ct_encode_string(str, &conv));
150 if (re_comp(ct_encode_string(pat, &conv)) != NULL)
153 return re_exec(ct_encode_string(str, &conv)) == 1;
159 * return True if the pattern matches the prefix
162 c_hmatch(EditLine *el, const wchar_t *str)
165 (void) fprintf(el->el_errfile, "match `%ls' with `%ls'\n",
166 el->el_search.patbuf, str);
169 return el_match(str, el->el_search.patbuf);
174 * Set the history seatch pattern
177 c_setpat(EditLine *el)
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';
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);
203 * Emacs incremental search
205 libedit_private el_action_t
206 ce_inc_search(EditLine *el, int dir)
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;
214 el_action_t ret = CC_NORM;
216 int ohisteventno = el->el_history.eventno;
217 size_t oldpatlen = el->el_search.patlen;
221 if (el->el_line.lastchar + sizeof(STRfwd) /
222 sizeof(*el->el_line.lastchar) + 2 +
223 el->el_search.patlen >= el->el_line.limit)
228 if (el->el_search.patlen == 0) { /* first round */
232 el->el_search.patbuf[el->el_search.patlen++] = '.';
233 el->el_search.patbuf[el->el_search.patlen++] = '*';
239 *el->el_line.lastchar++ = '\n';
240 for (cp = (newdir == ED_SEARCH_PREV_HISTORY) ? STRbck : STRfwd;
241 *cp; *el->el_line.lastchar++ = *cp++)
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++)
248 *el->el_line.lastchar = '\0';
251 if (el_wgetc(el, &ch) != 1)
252 return ed_end_of_file(el, 0);
254 switch (el->el_map.current[(unsigned char) ch]) {
257 if (el->el_search.patlen >= EL_BUFSIZ - LEN)
260 el->el_search.patbuf[el->el_search.patlen++] =
262 *el->el_line.lastchar++ = ch;
263 *el->el_line.lastchar = '\0';
268 case EM_INC_SEARCH_NEXT:
269 newdir = ED_SEARCH_NEXT_HISTORY;
273 case EM_INC_SEARCH_PREV:
274 newdir = ED_SEARCH_PREV_HISTORY;
278 case EM_DELETE_PREV_CHAR:
279 case ED_DELETE_PREV_CHAR:
280 if (el->el_search.patlen > LEN)
288 case 0007: /* ^G: Abort */
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,
303 while (el->el_line.cursor < cp &&
304 *el->el_line.cursor != '\n') {
305 if (el->el_search.patlen >=
310 el->el_search.patbuf[el->el_search.patlen++] =
312 *el->el_line.lastchar++ =
313 *el->el_line.cursor++;
315 el->el_line.cursor = ocursor;
316 *el->el_line.lastchar = '\0';
319 } else if (isglob(*cp)) {
325 default: /* Terminate and execute cmd */
327 el_wpush(el, endcmd);
330 case 0033: /* ESC: Terminate */
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';
345 /* Can't search if unmatched '[' */
346 for (cp = &el->el_search.patbuf[el->el_search.patlen-1],
348 cp >= &el->el_search.patbuf[LEN];
350 if (*cp == '[' || *cp == ']') {
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
364 el->el_line.cursor = newdir ==
365 ED_SEARCH_PREV_HISTORY ?
366 el->el_line.lastchar :
369 el->el_line.cursor +=
371 ED_SEARCH_PREV_HISTORY ?
375 el->el_search.patbuf[el->el_search.patlen++] =
377 el->el_search.patbuf[el->el_search.patlen++] =
380 el->el_search.patbuf[el->el_search.patlen] =
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))
387 el->el_state.lastcmd =
388 (el_action_t) newdir;
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 :
398 (void) ce_search_line(el,
402 el->el_search.patlen -= LEN;
403 el->el_search.patbuf[el->el_search.patlen] =
405 if (ret == CC_ERROR) {
407 if (el->el_history.eventno !=
409 el->el_history.eventno =
411 if (hist_get(el) == CC_ERROR)
414 el->el_line.cursor = ocursor;
420 ret = ce_inc_search(el, newdir);
422 if (ret == CC_ERROR && pchar == '?' && oldpchar == ':')
424 * break abort of failed search at last
430 if (ret == CC_NORM || (ret == CC_ERROR && oldpatlen == 0)) {
431 /* restore on normal return or error exit */
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)
439 el->el_line.cursor = ocursor;
443 if (done || ret != CC_NORM)
452 libedit_private el_action_t
453 cv_search(EditLine *el, int dir)
456 wchar_t tmpbuf[EL_BUFSIZ];
465 el->el_search.patdir = dir;
467 tmplen = c_gets(el, &tmpbuf[LEN],
468 dir == ED_SEARCH_PREV_HISTORY ? L"\n/" : L"\n?" );
474 tmpbuf[tmplen] = '\0';
478 * Use the old pattern, but wild-card it.
480 if (el->el_search.patlen == 0) {
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,
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';
501 tmpbuf[tmplen++] = '.';
502 tmpbuf[tmplen++] = '*';
504 tmpbuf[tmplen] = '\0';
505 (void) wcsncpy(el->el_search.patbuf, tmpbuf, EL_BUFSIZ - 1);
506 el->el_search.patlen = (size_t)tmplen;
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) {
517 return ed_newline(el, 0);
524 * Look for a pattern inside a line
526 libedit_private el_action_t
527 ce_search_line(EditLine *el, int dir)
529 wchar_t *cp = el->el_line.cursor;
530 wchar_t *pattern = el->el_search.patbuf;
541 if (dir == ED_SEARCH_PREV_HISTORY) {
542 for (; cp >= el->el_line.buffer; cp--) {
543 if (el_match(cp, ocp)) {
545 el->el_line.cursor = cp;
552 for (; *cp != '\0' && cp < el->el_line.limit; cp++) {
553 if (el_match(cp, ocp)) {
555 el->el_line.cursor = cp;
568 libedit_private el_action_t
569 cv_repeat_srch(EditLine *el, wint_t c)
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));
578 el->el_state.lastcmd = (el_action_t) c; /* Hack to stop c_setpat */
579 el->el_line.lastchar = el->el_line.buffer;
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);
593 * Vi character search
595 libedit_private el_action_t
596 cv_csearch(EditLine *el, int direction, wint_t ch, int count, int tflag)
603 if (ch == (wint_t)-1) {
605 if (el_wgetc(el, &c) != 1)
606 return ed_end_of_file(el, 0);
610 /* Save for ';' and ',' commands */
611 el->el_search.chacha = ch;
612 el->el_search.chadir = direction;
613 el->el_search.chatflg = (char)tflag;
615 cp = el->el_line.cursor;
617 if ((wint_t)*cp == ch)
619 for (;;cp += direction) {
620 if (cp >= el->el_line.lastchar)
622 if (cp < el->el_line.buffer)
624 if ((wint_t)*cp == ch)
632 el->el_line.cursor = cp;
634 if (el->el_chared.c_vcmd.action != NOP) {
636 el->el_line.cursor++;