GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: lib/libedit/search.c Lines: 10 251 4.0 %
Date: 2017-11-13 Branches: 1 158 0.6 %

Line Branch Exec Source
1
/*	$OpenBSD: search.c,v 1.27 2016/05/06 13:12:52 schwarze Exp $	*/
2
/*	$NetBSD: search.c,v 1.45 2016/04/18 17:01:19 christos Exp $	*/
3
4
/*-
5
 * Copyright (c) 1992, 1993
6
 *	The Regents of the University of California.  All rights reserved.
7
 *
8
 * This code is derived from software contributed to Berkeley by
9
 * Christos Zoulas of Cornell University.
10
 *
11
 * Redistribution and use in source and binary forms, with or without
12
 * modification, are permitted provided that the following conditions
13
 * are met:
14
 * 1. Redistributions of source code must retain the above copyright
15
 *    notice, this list of conditions and the following disclaimer.
16
 * 2. Redistributions in binary form must reproduce the above copyright
17
 *    notice, this list of conditions and the following disclaimer in the
18
 *    documentation and/or other materials provided with the distribution.
19
 * 3. Neither the name of the University nor the names of its contributors
20
 *    may be used to endorse or promote products derived from this software
21
 *    without specific prior written permission.
22
 *
23
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33
 * SUCH DAMAGE.
34
 */
35
36
#include "config.h"
37
38
/*
39
 * search.c: History and character search functions
40
 */
41
#include <stdlib.h>
42
#include <string.h>
43
#if defined(REGEX)
44
#include <regex.h>
45
#elif defined(REGEXP)
46
#include <regexp.h>
47
#endif
48
49
#include "el.h"
50
#include "common.h"
51
#include "fcns.h"
52
53
/*
54
 * Adjust cursor in vi mode to include the character under it
55
 */
56
#define	EL_CURSOR(el) \
57
    ((el)->el_line.cursor + (((el)->el_map.type == MAP_VI) && \
58
			    ((el)->el_map.current == (el)->el_map.alt)))
59
60
/* search_init():
61
 *	Initialize the search stuff
62
 */
63
protected int
64
search_init(EditLine *el)
65
{
66
67
6
	el->el_search.patbuf = reallocarray(NULL, EL_BUFSIZ,
68
	    sizeof(*el->el_search.patbuf));
69
3
	if (el->el_search.patbuf == NULL)
70
		return -1;
71
3
	*el->el_search.patbuf = L'\0';
72
3
	el->el_search.patlen = 0;
73
3
	el->el_search.patdir = -1;
74
3
	el->el_search.chacha = '\0';
75
3
	el->el_search.chadir = CHAR_FWD;
76
3
	el->el_search.chatflg = 0;
77
3
	return 0;
78
3
}
79
80
81
/* search_end():
82
 *	Initialize the search stuff
83
 */
84
protected void
85
search_end(EditLine *el)
86
{
87
88
	free(el->el_search.patbuf);
89
	el->el_search.patbuf = NULL;
90
}
91
92
93
#ifdef REGEXP
94
/* regerror():
95
 *	Handle regular expression errors
96
 */
97
void
98
/*ARGSUSED*/
99
regerror(const char *msg)
100
{
101
}
102
#endif
103
104
105
/* el_match():
106
 *	Return if string matches pattern
107
 */
108
protected int
109
el_match(const wchar_t *str, const wchar_t *pat)
110
{
111
	static ct_buffer_t conv;
112
#if defined (REGEX)
113
	regex_t re;
114
	int rv;
115
#elif defined (REGEXP)
116
	regexp *rp;
117
	int rv;
118
#else
119
	extern char	*re_comp(const char *);
120
	extern int	 re_exec(const char *);
121
#endif
122
123
	if (wcsstr(str, pat) != 0)
124
		return 1;
125
126
#if defined(REGEX)
127
	if (regcomp(&re, ct_encode_string(pat, &conv), 0) == 0) {
128
		rv = regexec(&re, ct_encode_string(str, &conv), 0, NULL, 0) == 0;
129
		regfree(&re);
130
	} else {
131
		rv = 0;
132
	}
133
	return rv;
134
#elif defined(REGEXP)
135
	if ((re = regcomp(ct_encode_string(pat, &conv))) != NULL) {
136
		rv = regexec(re, ct_encode_string(str, &conv));
137
		free(re);
138
	} else {
139
		rv = 0;
140
	}
141
	return rv;
142
#else
143
	if (re_comp(ct_encode_string(pat, &conv)) != NULL)
144
		return 0;
145
	else
146
		return re_exec(ct_encode_string(str, &conv)) == 1;
147
#endif
148
}
149
150
151
/* c_hmatch():
152
 *	 return True if the pattern matches the prefix
153
 */
154
protected int
155
c_hmatch(EditLine *el, const wchar_t *str)
156
{
157
#ifdef SDEBUG
158
	(void) fprintf(el->el_errfile, "match `%s' with `%s'\n",
159
	    el->el_search.patbuf, str);
160
#endif /* SDEBUG */
161
162
	return el_match(str, el->el_search.patbuf);
163
}
164
165
166
/* c_setpat():
167
 *	Set the history seatch pattern
168
 */
169
protected void
170
c_setpat(EditLine *el)
171
{
172
	if (el->el_state.lastcmd != ED_SEARCH_PREV_HISTORY &&
173
	    el->el_state.lastcmd != ED_SEARCH_NEXT_HISTORY) {
174
		el->el_search.patlen = EL_CURSOR(el) - el->el_line.buffer;
175
		if (el->el_search.patlen >= EL_BUFSIZ)
176
			el->el_search.patlen = EL_BUFSIZ - 1;
177
		if (el->el_search.patlen != 0) {
178
			(void) wcsncpy(el->el_search.patbuf, el->el_line.buffer,
179
			    el->el_search.patlen);
180
			el->el_search.patbuf[el->el_search.patlen] = '\0';
181
		} else
182
			el->el_search.patlen = wcslen(el->el_search.patbuf);
183
	}
184
#ifdef SDEBUG
185
	(void) fprintf(el->el_errfile, "\neventno = %d\n",
186
	    el->el_history.eventno);
187
	(void) fprintf(el->el_errfile, "patlen = %d\n", el->el_search.patlen);
188
	(void) fprintf(el->el_errfile, "patbuf = \"%s\"\n",
189
	    el->el_search.patbuf);
190
	(void) fprintf(el->el_errfile, "cursor %d lastchar %d\n",
191
	    EL_CURSOR(el) - el->el_line.buffer,
192
	    el->el_line.lastchar - el->el_line.buffer);
193
#endif
194
}
195
196
197
/* ce_inc_search():
198
 *	Emacs incremental search
199
 */
200
protected el_action_t
201
ce_inc_search(EditLine *el, int dir)
202
{
203
	static const wchar_t STRfwd[] = L"fwd", STRbck[] = L"bck";
204
	static wchar_t pchar = L':';  /* ':' = normal, '?' = failed */
205
	static wchar_t endcmd[2] = {'\0', '\0'};
206
	wchar_t *ocursor = el->el_line.cursor, oldpchar = pchar, ch;
207
	const wchar_t *cp;
208
209
	el_action_t ret = CC_NORM;
210
211
	int ohisteventno = el->el_history.eventno;
212
	size_t oldpatlen = el->el_search.patlen;
213
	int newdir = dir;
214
	int done, redo;
215
216
	if (el->el_line.lastchar + sizeof(STRfwd) /
217
	    sizeof(*el->el_line.lastchar) + 2 +
218
	    el->el_search.patlen >= el->el_line.limit)
219
		return CC_ERROR;
220
221
	for (;;) {
222
223
		if (el->el_search.patlen == 0) {	/* first round */
224
			pchar = ':';
225
#ifdef ANCHOR
226
#define	LEN	2
227
			el->el_search.patbuf[el->el_search.patlen++] = '.';
228
			el->el_search.patbuf[el->el_search.patlen++] = '*';
229
#else
230
#define	LEN	0
231
#endif
232
		}
233
		done = redo = 0;
234
		*el->el_line.lastchar++ = '\n';
235
		for (cp = (newdir == ED_SEARCH_PREV_HISTORY) ? STRbck : STRfwd;
236
		    *cp; *el->el_line.lastchar++ = *cp++)
237
			continue;
238
		*el->el_line.lastchar++ = pchar;
239
		for (cp = &el->el_search.patbuf[LEN];
240
		    cp < &el->el_search.patbuf[el->el_search.patlen];
241
		    *el->el_line.lastchar++ = *cp++)
242
			continue;
243
		*el->el_line.lastchar = '\0';
244
		re_refresh(el);
245
246
		if (el_wgetc(el, &ch) != 1)
247
			return ed_end_of_file(el, 0);
248
249
		switch (el->el_map.current[(unsigned char) ch]) {
250
		case ED_INSERT:
251
		case ED_DIGIT:
252
			if (el->el_search.patlen >= EL_BUFSIZ - LEN)
253
				terminal_beep(el);
254
			else {
255
				el->el_search.patbuf[el->el_search.patlen++] =
256
				    ch;
257
				*el->el_line.lastchar++ = ch;
258
				*el->el_line.lastchar = '\0';
259
				re_refresh(el);
260
			}
261
			break;
262
263
		case EM_INC_SEARCH_NEXT:
264
			newdir = ED_SEARCH_NEXT_HISTORY;
265
			redo++;
266
			break;
267
268
		case EM_INC_SEARCH_PREV:
269
			newdir = ED_SEARCH_PREV_HISTORY;
270
			redo++;
271
			break;
272
273
		case EM_DELETE_PREV_CHAR:
274
		case ED_DELETE_PREV_CHAR:
275
			if (el->el_search.patlen > LEN)
276
				done++;
277
			else
278
				terminal_beep(el);
279
			break;
280
281
		default:
282
			switch (ch) {
283
			case 0007:	/* ^G: Abort */
284
				ret = CC_ERROR;
285
				done++;
286
				break;
287
288
			case 0027:	/* ^W: Append word */
289
			/* No can do if globbing characters in pattern */
290
				for (cp = &el->el_search.patbuf[LEN];; cp++)
291
				    if (cp >= &el->el_search.patbuf[
292
					el->el_search.patlen]) {
293
					el->el_line.cursor +=
294
					    el->el_search.patlen - LEN - 1;
295
					cp = c__next_word(el->el_line.cursor,
296
					    el->el_line.lastchar, 1,
297
					    ce__isword);
298
					while (el->el_line.cursor < cp &&
299
					    *el->el_line.cursor != '\n') {
300
						if (el->el_search.patlen >=
301
						    EL_BUFSIZ - LEN) {
302
							terminal_beep(el);
303
							break;
304
						}
305
						el->el_search.patbuf[el->el_search.patlen++] =
306
						    *el->el_line.cursor;
307
						*el->el_line.lastchar++ =
308
						    *el->el_line.cursor++;
309
					}
310
					el->el_line.cursor = ocursor;
311
					*el->el_line.lastchar = '\0';
312
					re_refresh(el);
313
					break;
314
				    } else if (isglob(*cp)) {
315
					    terminal_beep(el);
316
					    break;
317
				    }
318
				break;
319
320
			default:	/* Terminate and execute cmd */
321
				endcmd[0] = ch;
322
				el_wpush(el, endcmd);
323
				/* FALLTHROUGH */
324
325
			case 0033:	/* ESC: Terminate */
326
				ret = CC_REFRESH;
327
				done++;
328
				break;
329
			}
330
			break;
331
		}
332
333
		while (el->el_line.lastchar > el->el_line.buffer &&
334
		    *el->el_line.lastchar != '\n')
335
			*el->el_line.lastchar-- = '\0';
336
		*el->el_line.lastchar = '\0';
337
338
		if (!done) {
339
340
			/* Can't search if unmatched '[' */
341
			for (cp = &el->el_search.patbuf[el->el_search.patlen-1],
342
			    ch = L']';
343
			    cp >= &el->el_search.patbuf[LEN];
344
			    cp--)
345
				if (*cp == '[' || *cp == ']') {
346
					ch = *cp;
347
					break;
348
				}
349
			if (el->el_search.patlen > LEN && ch != L'[') {
350
				if (redo && newdir == dir) {
351
					if (pchar == '?') { /* wrap around */
352
						el->el_history.eventno =
353
						    newdir == ED_SEARCH_PREV_HISTORY ? 0 : 0x7fffffff;
354
						if (hist_get(el) == CC_ERROR)
355
							/* el->el_history.event
356
							 * no was fixed by
357
							 * first call */
358
							(void) hist_get(el);
359
						el->el_line.cursor = newdir ==
360
						    ED_SEARCH_PREV_HISTORY ?
361
						    el->el_line.lastchar :
362
						    el->el_line.buffer;
363
					} else
364
						el->el_line.cursor +=
365
						    newdir ==
366
						    ED_SEARCH_PREV_HISTORY ?
367
						    -1 : 1;
368
				}
369
#ifdef ANCHOR
370
				el->el_search.patbuf[el->el_search.patlen++] =
371
				    '.';
372
				el->el_search.patbuf[el->el_search.patlen++] =
373
				    '*';
374
#endif
375
				el->el_search.patbuf[el->el_search.patlen] =
376
				    '\0';
377
				if (el->el_line.cursor < el->el_line.buffer ||
378
				    el->el_line.cursor > el->el_line.lastchar ||
379
				    (ret = ce_search_line(el, newdir))
380
				    == CC_ERROR) {
381
					/* avoid c_setpat */
382
					el->el_state.lastcmd =
383
					    (el_action_t) newdir;
384
					ret = newdir == ED_SEARCH_PREV_HISTORY ?
385
					    ed_search_prev_history(el, 0) :
386
					    ed_search_next_history(el, 0);
387
					if (ret != CC_ERROR) {
388
						el->el_line.cursor = newdir ==
389
						    ED_SEARCH_PREV_HISTORY ?
390
						    el->el_line.lastchar :
391
						    el->el_line.buffer;
392
						(void) ce_search_line(el,
393
						    newdir);
394
					}
395
				}
396
				el->el_search.patlen -= LEN;
397
				el->el_search.patbuf[el->el_search.patlen] =
398
				    '\0';
399
				if (ret == CC_ERROR) {
400
					terminal_beep(el);
401
					if (el->el_history.eventno !=
402
					    ohisteventno) {
403
						el->el_history.eventno =
404
						    ohisteventno;
405
						if (hist_get(el) == CC_ERROR)
406
							return CC_ERROR;
407
					}
408
					el->el_line.cursor = ocursor;
409
					pchar = '?';
410
				} else {
411
					pchar = ':';
412
				}
413
			}
414
			ret = ce_inc_search(el, newdir);
415
416
			if (ret == CC_ERROR && pchar == '?' && oldpchar == ':')
417
				/*
418
				 * break abort of failed search at last
419
				 * non-failed
420
				 */
421
				ret = CC_NORM;
422
423
		}
424
		if (ret == CC_NORM || (ret == CC_ERROR && oldpatlen == 0)) {
425
			/* restore on normal return or error exit */
426
			pchar = oldpchar;
427
			el->el_search.patlen = oldpatlen;
428
			if (el->el_history.eventno != ohisteventno) {
429
				el->el_history.eventno = ohisteventno;
430
				if (hist_get(el) == CC_ERROR)
431
					return CC_ERROR;
432
			}
433
			el->el_line.cursor = ocursor;
434
			if (ret == CC_ERROR)
435
				re_refresh(el);
436
		}
437
		if (done || ret != CC_NORM)
438
			return ret;
439
	}
440
}
441
442
443
/* cv_search():
444
 *	Vi search.
445
 */
446
protected el_action_t
447
cv_search(EditLine *el, int dir)
448
{
449
	wchar_t ch;
450
	wchar_t tmpbuf[EL_BUFSIZ];
451
	int tmplen;
452
453
#ifdef ANCHOR
454
	tmpbuf[0] = '.';
455
	tmpbuf[1] = '*';
456
#endif
457
	tmplen = LEN;
458
459
	el->el_search.patdir = dir;
460
461
	tmplen = c_gets(el, &tmpbuf[LEN],
462
		dir == ED_SEARCH_PREV_HISTORY ? L"\n/" : L"\n?" );
463
	if (tmplen == -1)
464
		return CC_REFRESH;
465
466
	tmplen += LEN;
467
	ch = tmpbuf[tmplen];
468
	tmpbuf[tmplen] = '\0';
469
470
	if (tmplen == LEN) {
471
		/*
472
		 * Use the old pattern, but wild-card it.
473
		 */
474
		if (el->el_search.patlen == 0) {
475
			re_refresh(el);
476
			return CC_ERROR;
477
		}
478
#ifdef ANCHOR
479
		if (el->el_search.patbuf[0] != '.' &&
480
		    el->el_search.patbuf[0] != '*') {
481
			(void) wcsncpy(tmpbuf, el->el_search.patbuf,
482
			    sizeof(tmpbuf) / sizeof(*tmpbuf) - 1);
483
			el->el_search.patbuf[0] = '.';
484
			el->el_search.patbuf[1] = '*';
485
			(void) wcsncpy(&el->el_search.patbuf[2], tmpbuf,
486
			    EL_BUFSIZ - 3);
487
			el->el_search.patlen++;
488
			el->el_search.patbuf[el->el_search.patlen++] = '.';
489
			el->el_search.patbuf[el->el_search.patlen++] = '*';
490
			el->el_search.patbuf[el->el_search.patlen] = '\0';
491
		}
492
#endif
493
	} else {
494
#ifdef ANCHOR
495
		tmpbuf[tmplen++] = '.';
496
		tmpbuf[tmplen++] = '*';
497
#endif
498
		tmpbuf[tmplen] = '\0';
499
		(void) wcsncpy(el->el_search.patbuf, tmpbuf, EL_BUFSIZ - 1);
500
		el->el_search.patlen = tmplen;
501
	}
502
	el->el_state.lastcmd = (el_action_t) dir;	/* avoid c_setpat */
503
	el->el_line.cursor = el->el_line.lastchar = el->el_line.buffer;
504
	if ((dir == ED_SEARCH_PREV_HISTORY ? ed_search_prev_history(el, 0) :
505
	    ed_search_next_history(el, 0)) == CC_ERROR) {
506
		re_refresh(el);
507
		return CC_ERROR;
508
	}
509
	if (ch == 0033) {
510
		re_refresh(el);
511
		return ed_newline(el, 0);
512
	}
513
	return CC_REFRESH;
514
}
515
516
517
/* ce_search_line():
518
 *	Look for a pattern inside a line
519
 */
520
protected el_action_t
521
ce_search_line(EditLine *el, int dir)
522
{
523
	wchar_t *cp = el->el_line.cursor;
524
	wchar_t *pattern = el->el_search.patbuf;
525
	wchar_t oc, *ocp;
526
#ifdef ANCHOR
527
	ocp = &pattern[1];
528
	oc = *ocp;
529
	*ocp = '^';
530
#else
531
	ocp = pattern;
532
	oc = *ocp;
533
#endif
534
535
	if (dir == ED_SEARCH_PREV_HISTORY) {
536
		for (; cp >= el->el_line.buffer; cp--) {
537
			if (el_match(cp, ocp)) {
538
				*ocp = oc;
539
				el->el_line.cursor = cp;
540
				return CC_NORM;
541
			}
542
		}
543
		*ocp = oc;
544
		return CC_ERROR;
545
	} else {
546
		for (; *cp != '\0' && cp < el->el_line.limit; cp++) {
547
			if (el_match(cp, ocp)) {
548
				*ocp = oc;
549
				el->el_line.cursor = cp;
550
				return CC_NORM;
551
			}
552
		}
553
		*ocp = oc;
554
		return CC_ERROR;
555
	}
556
}
557
558
559
/* cv_repeat_srch():
560
 *	Vi repeat search
561
 */
562
protected el_action_t
563
cv_repeat_srch(EditLine *el, wint_t c)
564
{
565
566
#ifdef SDEBUG
567
	(void) fprintf(el->el_errfile, "dir %d patlen %d patbuf %s\n",
568
	    c, el->el_search.patlen, ct_encode_string(el->el_search.patbuf));
569
#endif
570
571
	el->el_state.lastcmd = (el_action_t) c;	/* Hack to stop c_setpat */
572
	el->el_line.lastchar = el->el_line.buffer;
573
574
	switch (c) {
575
	case ED_SEARCH_NEXT_HISTORY:
576
		return ed_search_next_history(el, 0);
577
	case ED_SEARCH_PREV_HISTORY:
578
		return ed_search_prev_history(el, 0);
579
	default:
580
		return CC_ERROR;
581
	}
582
}
583
584
585
/* cv_csearch():
586
 *	Vi character search
587
 */
588
protected el_action_t
589
cv_csearch(EditLine *el, int direction, wint_t ch, int count, int tflag)
590
{
591
	wchar_t *cp;
592
593
	if (ch == 0)
594
		return CC_ERROR;
595
596
	if (ch == (wint_t)-1) {
597
		if (el_wgetc(el, &ch) != 1)
598
			return ed_end_of_file(el, 0);
599
	}
600
601
	/* Save for ';' and ',' commands */
602
	el->el_search.chacha = ch;
603
	el->el_search.chadir = direction;
604
	el->el_search.chatflg = tflag;
605
606
	cp = el->el_line.cursor;
607
	while (count--) {
608
		if ((wint_t)*cp == ch)
609
			cp += direction;
610
		for (;;cp += direction) {
611
			if (cp >= el->el_line.lastchar)
612
				return CC_ERROR;
613
			if (cp < el->el_line.buffer)
614
				return CC_ERROR;
615
			if ((wint_t)*cp == ch)
616
				break;
617
		}
618
	}
619
620
	if (tflag)
621
		cp -= direction;
622
623
	el->el_line.cursor = cp;
624
625
	if (el->el_chared.c_vcmd.action != NOP) {
626
		if (direction > 0)
627
			el->el_line.cursor++;
628
		cv_delfini(el);
629
		return CC_REFRESH;
630
	}
631
	return CC_CURSOR;
632
}