search.c

Revision 52b8bc4e1ecc74b21f4db46822bfe9c609fb818a, 15.8 kB (checked in by Theo Schlossnagle <jesus@omniti.com>, 5 years ago)
refs #283
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1	/* $NetBSD: search.c,v 1.11 2001/01/23 15:55:31 jdolecek 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. All advertising materials mentioning features or use of this software
19	* must display the following acknowledgement:
20	* This product includes software developed by the University of
21	* California, Berkeley and its contributors.
22	* 4. Neither the name of the University nor the names of its contributors
23	* may be used to endorse or promote products derived from this software
24	* without specific prior written permission.
25	*
26	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
27	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
28	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
29	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
30	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
31	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
32	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
33	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
34	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
35	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36	* SUCH DAMAGE.
37	*/
38
39	#include "noitedit/compat.h"
40	#if !defined(lint) && !defined(SCCSID)
41	#if 0
42	static char sccsid[] = "@(#)search.c 8.1 (Berkeley) 6/4/93";
43	#else
44	__RCSID("$NetBSD: search.c,v 1.11 2001/01/23 15:55:31 jdolecek Exp $");
45	#endif
46	#endif /* not lint && not SCCSID */
47
48	/*
49	* search.c: History and character search functions
50	*/
51	#include "noit_defines.h"
52	#include "noitedit/sys.h"
53	#include <stdlib.h>
54	#if HAVE_SYS_TYPES_H
55	#include <sys/types.h>
56	#endif
57	#if defined(PCREPOSIXREGEX)
58	#include <pcre.h>
59	#include <pcreposix.h>
60	#elif defined(REGEX)
61	#include <regex.h>
62	#elif defined(REGEXP)
63	#include <regexp.h>
64	#endif
65	#include "noitedit/el.h"
66
67	/*
68	* Adjust cursor in vi mode to include the character under it
69	*/
70	#define EL_CURSOR(el) \
71	((el)->el_line.cursor + (((el)->el_map.type == MAP_VI) && \
72	((el)->el_map.current == (el)->el_map.alt)))
73
74	/* search_init():
75	* Initialize the search stuff
76	*/
77	protected int
78	search_init(EditLine *el)
79	{
80
81	el->el_search.patbuf = (char *) el_malloc(EL_BUFSIZ);
82	if (el->el_search.patbuf == NULL)
83	return (-1);
84	el->el_search.patlen = 0;
85	el->el_search.patdir = -1;
86	el->el_search.chacha = '\0';
87	el->el_search.chadir = -1;
88	return (0);
89	}
90
91
92	/* search_end():
93	* Initialize the search stuff
94	*/
95	protected void
96	search_end(EditLine *el)
97	{
98
99	el_free((ptr_t) el->el_search.patbuf);
100	el->el_search.patbuf = NULL;
101	}
102
103
104	#ifdef REGEXP
105	/* regerror():
106	* Handle regular expression errors
107	*/
108	public void
109	/ARGSUSED/
110	regerror(const char *msg)
111	{
112	}
113	#endif
114
115
116	/* el_match():
117	* Return if string matches pattern
118	*/
119	protected int
120	el_match(const char str, const char pat)
121	{
122	#if defined (REGEX) \|\| defined(PCREPOSIXREGEX)
123	regex_t re;
124	int rv;
125	#elif defined (REGEXP)
126	regexp *rp;
127	int rv;
128	#else
129	extern char re_comp(const char );
130	extern int re_exec(const char *);
131	#endif
132
133	if (strstr(str, pat) != NULL)
134	return (1);
135
136	#if defined(REGEX) \|\| defined(PCREPOSIXREGEX)
137	if (regcomp(&re, pat, 0) == 0) {
138	rv = regexec(&re, str, 0, NULL, 0) == 0;
139	regfree(&re);
140	} else {
141	rv = 0;
142	}
143	return (rv);
144	#elif defined(REGEXP)
145	if ((re = regcomp(pat)) != NULL) {
146	rv = regexec(re, str);
147	free((ptr_t) re);
148	} else {
149	rv = 0;
150	}
151	return (rv);
152	#else
153	if (re_comp(pat) != NULL)
154	return (0);
155	else
156	return (re_exec(str) == 1);
157	#endif
158	}
159
160
161	/* c_hmatch():
162	* return True if the pattern matches the prefix
163	*/
164	protected int
165	c_hmatch(EditLine el, const char str)
166	{
167	#ifdef SDEBUG
168	(void) fprintf(el->el_errfile, "match `%s' with `%s'\n",
169	el->el_search.patbuf, str);
170	#endif /* SDEBUG */
171
172	return (el_match(str, el->el_search.patbuf));
173	}
174
175
176	/* c_setpat():
177	* Set the history seatch pattern
178	*/
179	protected void
180	c_setpat(EditLine *el)
181	{
182	if (el->el_state.lastcmd != ED_SEARCH_PREV_HISTORY &&
183	el->el_state.lastcmd != ED_SEARCH_NEXT_HISTORY) {
184	el->el_search.patlen = EL_CURSOR(el) - el->el_line.buffer;
185	if (el->el_search.patlen >= EL_BUFSIZ)
186	el->el_search.patlen = EL_BUFSIZ - 1;
187	if (el->el_search.patlen != 0) {
188	(void) strncpy(el->el_search.patbuf, el->el_line.buffer,
189	el->el_search.patlen);
190	el->el_search.patbuf[el->el_search.patlen] = '\0';
191	} else
192	el->el_search.patlen = strlen(el->el_search.patbuf);
193	}
194	#ifdef SDEBUG
195	(void) fprintf(el->el_errfile, "\neventno = %d\n",
196	el->el_history.eventno);
197	(void) fprintf(el->el_errfile, "patlen = %d\n", el->el_search.patlen);
198	(void) fprintf(el->el_errfile, "patbuf = \"%s\"\n",
199	el->el_search.patbuf);
200	(void) fprintf(el->el_errfile, "cursor %d lastchar %d\n",
201	EL_CURSOR(el) - el->el_line.buffer,
202	el->el_line.lastchar - el->el_line.buffer);
203	#endif
204	}
205
206
207	/* ce_inc_search():
208	* Emacs incremental search
209	*/
210	protected el_action_t
211	ce_inc_search(EditLine *el, int dir)
212	{
213	static const char STRfwd[] = {'f', 'w', 'd', '\0'},
214	STRbck[] = {'b', 'c', 'k', '\0'};
215	static char pchar = ':';/* ':' = normal, '?' = failed */
216	static char endcmd[2] = {'\0', '\0'};
217	char ch, *ocursor = el->el_line.cursor, oldpchar = pchar;
218	const char *cp;
219
220	el_action_t ret = CC_NORM;
221
222	int ohisteventno = el->el_history.eventno;
223	int oldpatlen = el->el_search.patlen;
224	int newdir = dir;
225	int done, redo;
226
227	if (el->el_line.lastchar + sizeof(STRfwd) / sizeof(char) + 2 +
228	el->el_search.patlen >= el->el_line.limit)
229	return (CC_ERROR);
230
231	for (;;) {
232
233	if (el->el_search.patlen == 0) { /* first round */
234	pchar = ':';
235	#ifdef ANCHOR
236	el->el_search.patbuf[el->el_search.patlen++] = '.';
237	el->el_search.patbuf[el->el_search.patlen++] = '*';
238	#endif
239	}
240	done = redo = 0;
241	*el->el_line.lastchar++ = '\n';
242	for (cp = (newdir == ED_SEARCH_PREV_HISTORY) ? STRbck : STRfwd;
243	cp; el->el_line.lastchar++ = *cp++)
244	continue;
245	*el->el_line.lastchar++ = pchar;
246	for (cp = &el->el_search.patbuf[1];
247	cp < &el->el_search.patbuf[el->el_search.patlen];
248	el->el_line.lastchar++ = cp++)
249	continue;
250	*el->el_line.lastchar = '\0';
251	re_refresh(el);
252
253	if (el_getc(el, &ch) != 1)
254	return (ed_end_of_file(el, 0));
255
256	switch (el->el_map.current[(unsigned char) ch]) {
257	case ED_INSERT:
258	case ED_DIGIT:
259	if (el->el_search.patlen > EL_BUFSIZ - 3)
260	term_beep(el);
261	else {
262	el->el_search.patbuf[el->el_search.patlen++] =
263	ch;
264	*el->el_line.lastchar++ = ch;
265	*el->el_line.lastchar = '\0';
266	re_refresh(el);
267	}
268	break;
269
270	case EM_INC_SEARCH_NEXT:
271	newdir = ED_SEARCH_NEXT_HISTORY;
272	redo++;
273	break;
274
275	case EM_INC_SEARCH_PREV:
276	newdir = ED_SEARCH_PREV_HISTORY;
277	redo++;
278	break;
279
280	case ED_DELETE_PREV_CHAR:
281	if (el->el_search.patlen > 1)
282	done++;
283	else
284	term_beep(el);
285	break;
286
287	default:
288	switch (ch) {
289	case 0007: /* ^G: Abort */
290	ret = CC_ERROR;
291	done++;
292	break;
293
294	case 0027: /* ^W: Append word */
295	/* No can do if globbing characters in pattern */
296	for (cp = &el->el_search.patbuf[1];; cp++)
297	if (cp >= &el->el_search.patbuf[el->el_search.patlen]) {
298	el->el_line.cursor +=
299	el->el_search.patlen - 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 - 3) {
307	term_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	term_beep(el);
321	break;
322	}
323	break;
324
325	default: /* Terminate and execute cmd */
326	endcmd[0] = ch;
327	el_push(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 = ']';
348	cp > el->el_search.patbuf;
349	cp--)
350	if (cp == '[' \|\| cp == ']') {
351	ch = *cp;
352	break;
353	}
354	if (el->el_search.patlen > 1 && ch != '[') {
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,
385	&el->el_search.patbuf[1],
386	newdir)) == CC_ERROR) {
387	/* avoid c_setpat */
388	el->el_state.lastcmd =
389	(el_action_t) newdir;
390	ret = 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	&el->el_search.patbuf[1],
400	newdir);
401	}
402	}
403	el->el_search.patbuf[--el->el_search.patlen] =
404	'\0';
405	if (ret == CC_ERROR) {
406	term_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	protected el_action_t
453	cv_search(EditLine *el, int dir)
454	{
455	char ch;
456	char tmpbuf[EL_BUFSIZ];
457	int tmplen;
458
459	tmplen = 0;
460	#ifdef ANCHOR
461	tmpbuf[tmplen++] = '.';
462	tmpbuf[tmplen] = '*';
463	#endif
464
465	el->el_line.buffer[0] = '\0';
466	el->el_line.lastchar = el->el_line.buffer;
467	el->el_line.cursor = el->el_line.buffer;
468	el->el_search.patdir = dir;
469
470	c_insert(el, 2); /* prompt + '\n' */
471	*el->el_line.cursor++ = '\n';
472	*el->el_line.cursor++ = dir == ED_SEARCH_PREV_HISTORY ? '/' : '?';
473	re_refresh(el);
474
475	#ifdef ANCHOR
476	#define LEN 2
477	#else
478	#define LEN 0
479	#endif
480
481	tmplen = c_gets(el, &tmpbuf[LEN]) + LEN;
482	ch = tmpbuf[tmplen];
483	tmpbuf[tmplen] = '\0';
484
485	if (tmplen == LEN) {
486	/*
487	* Use the old pattern, but wild-card it.
488	*/
489	if (el->el_search.patlen == 0) {
490	el->el_line.buffer[0] = '\0';
491	el->el_line.lastchar = el->el_line.buffer;
492	el->el_line.cursor = el->el_line.buffer;
493	re_refresh(el);
494	return (CC_ERROR);
495	}
496	#ifdef ANCHOR
497	if (el->el_search.patbuf[0] != '.' &&
498	el->el_search.patbuf[0] != '*') {
499	(void) strncpy(tmpbuf, el->el_search.patbuf,
500	sizeof(tmpbuf) - 1);
501	el->el_search.patbuf[0] = '.';
502	el->el_search.patbuf[1] = '*';
503	(void) strncpy(&el->el_search.patbuf[2], tmpbuf,
504	EL_BUFSIZ - 3);
505	el->el_search.patlen++;
506	el->el_search.patbuf[el->el_search.patlen++] = '.';
507	el->el_search.patbuf[el->el_search.patlen++] = '*';
508	el->el_search.patbuf[el->el_search.patlen] = '\0';
509	}
510	#endif
511	} else {
512	#ifdef ANCHOR
513	tmpbuf[tmplen++] = '.';
514	tmpbuf[tmplen++] = '*';
515	#endif
516	tmpbuf[tmplen] = '\0';
517	(void) strncpy(el->el_search.patbuf, tmpbuf, EL_BUFSIZ - 1);
518	el->el_search.patlen = tmplen;
519	}
520	el->el_state.lastcmd = (el_action_t) dir; /* avoid c_setpat */
521	el->el_line.cursor = el->el_line.lastchar = el->el_line.buffer;
522	if ((dir == ED_SEARCH_PREV_HISTORY ? ed_search_prev_history(el, 0) :
523	ed_search_next_history(el, 0)) == CC_ERROR) {
524	re_refresh(el);
525	return (CC_ERROR);
526	} else {
527	if (ch == 0033) {
528	re_refresh(el);
529	*el->el_line.lastchar++ = '\n';
530	*el->el_line.lastchar = '\0';
531	re_goto_bottom(el);
532	return (CC_NEWLINE);
533	} else
534	return (CC_REFRESH);
535	}
536	}
537
538
539	/* ce_search_line():
540	* Look for a pattern inside a line
541	*/
542	protected el_action_t
543	ce_search_line(EditLine el, char pattern, int dir)
544	{
545	char *cp;
546
547	if (dir == ED_SEARCH_PREV_HISTORY) {
548	for (cp = el->el_line.cursor; cp >= el->el_line.buffer; cp--)
549	if (el_match(cp, pattern)) {
550	el->el_line.cursor = cp;
551	return (CC_NORM);
552	}
553	return (CC_ERROR);
554	} else {
555	for (cp = el->el_line.cursor; *cp != '\0' &&
556	cp < el->el_line.limit; cp++)
557	if (el_match(cp, pattern)) {
558	el->el_line.cursor = cp;
559	return (CC_NORM);
560	}
561	return (CC_ERROR);
562	}
563	}
564
565
566	/* cv_repeat_srch():
567	* Vi repeat search
568	*/
569	protected el_action_t
570	cv_repeat_srch(EditLine *el, int c)
571	{
572
573	#ifdef SDEBUG
574	(void) fprintf(el->el_errfile, "dir %d patlen %d patbuf %s\n",
575	c, el->el_search.patlen, el->el_search.patbuf);
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_back():
593	* Vi character search reverse
594	*/
595	protected el_action_t
596	cv_csearch_back(EditLine *el, int ch, int count, int tflag)
597	{
598	char *cp;
599
600	cp = el->el_line.cursor;
601	while (count--) {
602	if (*cp == ch)
603	cp--;
604	while (cp > el->el_line.buffer && *cp != ch)
605	cp--;
606	}
607
608	if (cp < el->el_line.buffer \|\| (cp == el->el_line.buffer && *cp != ch))
609	return (CC_ERROR);
610
611	if (*cp == ch && tflag)
612	cp++;
613
614	el->el_line.cursor = cp;
615
616	if (el->el_chared.c_vcmd.action & DELETE) {
617	el->el_line.cursor++;
618	cv_delfini(el);
619	return (CC_REFRESH);
620	}
621	re_refresh_cursor(el);
622	return (CC_NORM);
623	}
624
625
626	/* cv_csearch_fwd():
627	* Vi character search forward
628	*/
629	protected el_action_t
630	cv_csearch_fwd(EditLine *el, int ch, int count, int tflag)
631	{
632	char *cp;
633
634	cp = el->el_line.cursor;
635	while (count--) {
636	if (*cp == ch)
637	cp++;
638	while (cp < el->el_line.lastchar && *cp != ch)
639	cp++;
640	}
641
642	if (cp >= el->el_line.lastchar)
643	return (CC_ERROR);
644
645	if (*cp == ch && tflag)
646	cp--;
647
648	el->el_line.cursor = cp;
649
650	if (el->el_chared.c_vcmd.action & DELETE) {
651	el->el_line.cursor++;
652	cv_delfini(el);
653	return (CC_REFRESH);
654	}
655	re_refresh_cursor(el);
656	return (CC_NORM);
657	}

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