xref: /vim-8.2.3635/src/quickfix.c (revision 7d1f5dbc)
1 /* vi:set ts=8 sts=4 sw=4:
2  *
3  * VIM - Vi IMproved	by Bram Moolenaar
4  *
5  * Do ":help uganda"  in Vim to read copying and usage conditions.
6  * Do ":help credits" in Vim to see a list of people who contributed.
7  * See README.txt for an overview of the Vim source code.
8  */
9 
10 /*
11  * quickfix.c: functions for quickfix mode, using a file with error messages
12  */
13 
14 #include "vim.h"
15 
16 #if defined(FEAT_QUICKFIX) || defined(PROTO)
17 
18 struct dir_stack_T
19 {
20     struct dir_stack_T	*next;
21     char_u		*dirname;
22 };
23 
24 static struct dir_stack_T   *dir_stack = NULL;
25 
26 /*
27  * For each error the next struct is allocated and linked in a list.
28  */
29 typedef struct qfline_S qfline_T;
30 struct qfline_S
31 {
32     qfline_T	*qf_next;	/* pointer to next error in the list */
33     qfline_T	*qf_prev;	/* pointer to previous error in the list */
34     linenr_T	qf_lnum;	/* line number where the error occurred */
35     int		qf_fnum;	/* file number for the line */
36     int		qf_col;		/* column where the error occurred */
37     int		qf_nr;		/* error number */
38     char_u	*qf_pattern;	/* search pattern for the error */
39     char_u	*qf_text;	/* description of the error */
40     char_u	qf_viscol;	/* set to TRUE if qf_col is screen column */
41     char_u	qf_cleared;	/* set to TRUE if line has been deleted */
42     char_u	qf_type;	/* type of the error (mostly 'E'); 1 for
43 				   :helpgrep */
44     char_u	qf_valid;	/* valid error message detected */
45 };
46 
47 /*
48  * There is a stack of error lists.
49  */
50 #define LISTCOUNT   10
51 
52 static struct qf_list
53 {
54     qfline_T	*qf_start;	/* pointer to the first error */
55     qfline_T	*qf_ptr;	/* pointer to the current error */
56     int		qf_count;	/* number of errors (0 means no error list) */
57     int		qf_index;	/* current index in the error list */
58     int		qf_nonevalid;	/* TRUE if not a single valid entry found */
59 } qf_lists[LISTCOUNT];
60 
61 static int	qf_curlist = 0;	/* current error list */
62 static int	qf_listcount = 0;   /* current number of lists */
63 
64 #define FMT_PATTERNS 10		/* maximum number of % recognized */
65 
66 /*
67  * Structure used to hold the info of one part of 'errorformat'
68  */
69 struct eformat
70 {
71     regprog_T	    *prog;	/* pre-formatted part of 'errorformat' */
72     struct eformat  *next;	/* pointer to next (NULL if last) */
73     char_u	    addr[FMT_PATTERNS]; /* indices of used % patterns */
74     char_u	    prefix;	/* prefix of this format line: */
75 				/*   'D' enter directory */
76 				/*   'X' leave directory */
77 				/*   'A' start of multi-line message */
78 				/*   'E' error message */
79 				/*   'W' warning message */
80 				/*   'I' informational message */
81 				/*   'C' continuation line */
82 				/*   'Z' end of multi-line message */
83 				/*   'G' general, unspecific message */
84 				/*   'P' push file (partial) message */
85 				/*   'Q' pop/quit file (partial) message */
86 				/*   'O' overread (partial) message */
87     char_u	    flags;	/* additional flags given in prefix */
88 				/*   '-' do not include this line */
89 };
90 
91 static int qf_init_ext __ARGS((char_u *efile, buf_T *buf, char_u *errorformat, int newlist, linenr_T lnumfirst, linenr_T lnumlast));
92 static void	qf_new_list __ARGS((void));
93 static int	qf_add_entry __ARGS((qfline_T **prevp, char_u *dir, char_u *fname, char_u *mesg, long lnum, int col, int vis_col, char_u *pattern, int nr, int type, int valid));
94 static void	qf_msg __ARGS((void));
95 static void	qf_free __ARGS((int idx));
96 static char_u	*qf_types __ARGS((int, int));
97 static int	qf_get_fnum __ARGS((char_u *, char_u *));
98 static char_u	*qf_push_dir __ARGS((char_u *, struct dir_stack_T **));
99 static char_u	*qf_pop_dir __ARGS((struct dir_stack_T **));
100 static char_u	*qf_guess_filepath __ARGS((char_u *));
101 static void	qf_fmt_text __ARGS((char_u *text, char_u *buf, int bufsize));
102 static void	qf_clean_dir_stack __ARGS((struct dir_stack_T **));
103 #ifdef FEAT_WINDOWS
104 static int	qf_win_pos_update __ARGS((int old_qf_index));
105 static buf_T	*qf_find_buf __ARGS((void));
106 static void	qf_update_buffer __ARGS((void));
107 static void	qf_fill_buffer __ARGS((void));
108 #endif
109 static char_u	*get_mef_name __ARGS((void));
110 static buf_T	*load_dummy_buffer __ARGS((char_u *fname));
111 static void	wipe_dummy_buffer __ARGS((buf_T *buf));
112 static void	unload_dummy_buffer __ARGS((buf_T *buf));
113 
114 /*
115  * Read the errorfile "efile" into memory, line by line, building the error
116  * list.
117  * Return -1 for error, number of errors for success.
118  */
119     int
120 qf_init(efile, errorformat, newlist)
121     char_u	    *efile;
122     char_u	    *errorformat;
123     int		    newlist;		/* TRUE: start a new error list */
124 {
125     if (efile == NULL)
126 	return FAIL;
127     return qf_init_ext(efile, curbuf, errorformat, newlist,
128 						    (linenr_T)0, (linenr_T)0);
129 }
130 
131 /*
132  * Read the errorfile "efile" into memory, line by line, building the error
133  * list.
134  * Alternative: when "efile" is null read errors from buffer "buf".
135  * Always use 'errorformat' from "buf" if there is a local value.
136  * Then lnumfirst and lnumlast specify the range of lines to use.
137  * Return -1 for error, number of errors for success.
138  */
139     static int
140 qf_init_ext(efile, buf, errorformat, newlist, lnumfirst, lnumlast)
141     char_u	    *efile;
142     buf_T	    *buf;
143     char_u	    *errorformat;
144     int		    newlist;		/* TRUE: start a new error list */
145     linenr_T	    lnumfirst;		/* first line number to use */
146     linenr_T	    lnumlast;		/* last line number to use */
147 {
148     char_u	    *namebuf;
149     char_u	    *errmsg;
150     char_u	    *pattern;
151     char_u	    *fmtstr = NULL;
152     int		    col = 0;
153     char_u	    use_viscol = FALSE;
154     int		    type = 0;
155     int		    valid;
156     linenr_T	    buflnum = lnumfirst;
157     long	    lnum = 0L;
158     int		    enr = 0;
159     FILE	    *fd = NULL;
160     qfline_T	    *qfprev = NULL;	/* init to make SASC shut up */
161     char_u	    *efmp;
162     struct eformat  *fmt_first = NULL;
163     struct eformat  *fmt_last = NULL;
164     struct eformat  *fmt_ptr;
165     char_u	    *efm;
166     char_u	    *ptr;
167     char_u	    *srcptr;
168     int		    len;
169     int		    i;
170     int		    round;
171     int		    idx = 0;
172     int		    multiline = FALSE;
173     int		    multiignore = FALSE;
174     int		    multiscan = FALSE;
175     int		    retval = -1;	/* default: return error flag */
176     char_u	    *directory = NULL;
177     char_u	    *currfile = NULL;
178     char_u	    *tail = NULL;
179     struct dir_stack_T  *file_stack = NULL;
180     regmatch_T	    regmatch;
181     static struct fmtpattern
182     {
183 	char_u	convchar;
184 	char	*pattern;
185     }		    fmt_pat[FMT_PATTERNS] =
186 		    {
187 			{'f', "\\f\\+"},
188 			{'n', "\\d\\+"},
189 			{'l', "\\d\\+"},
190 			{'c', "\\d\\+"},
191 			{'t', "."},
192 			{'m', ".\\+"},
193 			{'r', ".*"},
194 			{'p', "[- .]*"},
195 			{'v', "\\d\\+"},
196 			{'s', ".\\+"}
197 		    };
198 
199     namebuf = alloc(CMDBUFFSIZE + 1);
200     errmsg = alloc(CMDBUFFSIZE + 1);
201     pattern = alloc(CMDBUFFSIZE + 1);
202     if (namebuf == NULL || errmsg == NULL || pattern == NULL)
203 	goto qf_init_end;
204 
205     if (efile != NULL && (fd = mch_fopen((char *)efile, "r")) == NULL)
206     {
207 	EMSG2(_(e_openerrf), efile);
208 	goto qf_init_end;
209     }
210 
211     if (newlist || qf_curlist == qf_listcount)
212 	/* make place for a new list */
213 	qf_new_list();
214     else if (qf_lists[qf_curlist].qf_count > 0)
215 	/* Adding to existing list, find last entry. */
216 	for (qfprev = qf_lists[qf_curlist].qf_start;
217 			    qfprev->qf_next != qfprev; qfprev = qfprev->qf_next)
218 	    ;
219 
220 /*
221  * Each part of the format string is copied and modified from errorformat to
222  * regex prog.  Only a few % characters are allowed.
223  */
224     /* Use the local value of 'errorformat' if it's set. */
225     if (errorformat == p_efm && *buf->b_p_efm != NUL)
226 	efm = buf->b_p_efm;
227     else
228 	efm = errorformat;
229     /*
230      * Get some space to modify the format string into.
231      */
232     i = (FMT_PATTERNS * 3) + ((int)STRLEN(efm) << 2);
233     for (round = FMT_PATTERNS; round > 0; )
234 	i += (int)STRLEN(fmt_pat[--round].pattern);
235 #ifdef COLON_IN_FILENAME
236     i += 12; /* "%f" can become twelve chars longer */
237 #else
238     i += 2; /* "%f" can become two chars longer */
239 #endif
240     if ((fmtstr = alloc(i)) == NULL)
241 	goto error2;
242 
243     while (efm[0])
244     {
245 	/*
246 	 * Allocate a new eformat structure and put it at the end of the list
247 	 */
248 	fmt_ptr = (struct eformat *)alloc((unsigned)sizeof(struct eformat));
249 	if (fmt_ptr == NULL)
250 	    goto error2;
251 	if (fmt_first == NULL)	    /* first one */
252 	    fmt_first = fmt_ptr;
253 	else
254 	    fmt_last->next = fmt_ptr;
255 	fmt_last = fmt_ptr;
256 	fmt_ptr->prefix = NUL;
257 	fmt_ptr->flags = NUL;
258 	fmt_ptr->next = NULL;
259 	fmt_ptr->prog = NULL;
260 	for (round = FMT_PATTERNS; round > 0; )
261 	    fmt_ptr->addr[--round] = NUL;
262 	/* round is 0 now */
263 
264 	/*
265 	 * Isolate one part in the 'errorformat' option
266 	 */
267 	for (len = 0; efm[len] != NUL && efm[len] != ','; ++len)
268 	    if (efm[len] == '\\' && efm[len + 1] != NUL)
269 		++len;
270 
271 	/*
272 	 * Build regexp pattern from current 'errorformat' option
273 	 */
274 	ptr = fmtstr;
275 	*ptr++ = '^';
276 	for (efmp = efm; efmp < efm + len; ++efmp)
277 	{
278 	    if (*efmp == '%')
279 	    {
280 		++efmp;
281 		for (idx = 0; idx < FMT_PATTERNS; ++idx)
282 		    if (fmt_pat[idx].convchar == *efmp)
283 			break;
284 		if (idx < FMT_PATTERNS)
285 		{
286 		    if (fmt_ptr->addr[idx])
287 		    {
288 			sprintf((char *)errmsg,
289 				_("E372: Too many %%%c in format string"), *efmp);
290 			EMSG(errmsg);
291 			goto error2;
292 		    }
293 		    if ((idx
294 				&& idx < 6
295 				&& vim_strchr((char_u *)"DXOPQ",
296 						     fmt_ptr->prefix) != NULL)
297 			    || (idx == 6
298 				&& vim_strchr((char_u *)"OPQ",
299 						    fmt_ptr->prefix) == NULL))
300 		    {
301 			sprintf((char *)errmsg,
302 				_("E373: Unexpected %%%c in format string"), *efmp);
303 			EMSG(errmsg);
304 			goto error2;
305 		    }
306 		    fmt_ptr->addr[idx] = (char_u)++round;
307 		    *ptr++ = '\\';
308 		    *ptr++ = '(';
309 #ifdef BACKSLASH_IN_FILENAME
310 		    if (*efmp == 'f')
311 		    {
312 			/* Also match "c:" in the file name, even when
313 			 * checking for a colon next: "%f:".
314 			 * "\%(\a:\)\=" */
315 			STRCPY(ptr, "\\%(\\a:\\)\\=");
316 			ptr += 10;
317 		    }
318 #endif
319 		    if (*efmp == 'f' && efmp[1] != NUL
320 					 && efmp[1] != '\\' && efmp[1] != '%')
321 		    {
322 			/* A file name may contain spaces, but this isn't in
323 			 * "\f".  use "[^x]\+" instead (x is next character) */
324 			*ptr++ = '[';
325 			*ptr++ = '^';
326 			*ptr++ = efmp[1];
327 			*ptr++ = ']';
328 			*ptr++ = '\\';
329 			*ptr++ = '+';
330 		    }
331 		    else
332 		    {
333 			srcptr = (char_u *)fmt_pat[idx].pattern;
334 			while ((*ptr = *srcptr++) != NUL)
335 			    ++ptr;
336 		    }
337 		    *ptr++ = '\\';
338 		    *ptr++ = ')';
339 		}
340 		else if (*efmp == '*')
341 		{
342 		    if (*++efmp == '[' || *efmp == '\\')
343 		    {
344 			if ((*ptr++ = *efmp) == '[')	/* %*[^a-z0-9] etc. */
345 			{
346 			    if (efmp[1] == '^')
347 				*ptr++ = *++efmp;
348 			    if (efmp < efm + len)
349 			    {
350 				*ptr++ = *++efmp;	    /* could be ']' */
351 				while (efmp < efm + len
352 					&& (*ptr++ = *++efmp) != ']')
353 				    /* skip */;
354 				if (efmp == efm + len)
355 				{
356 				    EMSG(_("E374: Missing ] in format string"));
357 				    goto error2;
358 				}
359 			    }
360 			}
361 			else if (efmp < efm + len)	/* %*\D, %*\s etc. */
362 			    *ptr++ = *++efmp;
363 			*ptr++ = '\\';
364 			*ptr++ = '+';
365 		    }
366 		    else
367 		    {
368 			/* TODO: scanf()-like: %*ud, %*3c, %*f, ... ? */
369 			sprintf((char *)errmsg,
370 				_("E375: Unsupported %%%c in format string"), *efmp);
371 			EMSG(errmsg);
372 			goto error2;
373 		    }
374 		}
375 		else if (vim_strchr((char_u *)"%\\.^$~[", *efmp) != NULL)
376 		    *ptr++ = *efmp;		/* regexp magic characters */
377 		else if (*efmp == '#')
378 		    *ptr++ = '*';
379 		else if (efmp == efm + 1)		/* analyse prefix */
380 		{
381 		    if (vim_strchr((char_u *)"+-", *efmp) != NULL)
382 			fmt_ptr->flags = *efmp++;
383 		    if (vim_strchr((char_u *)"DXAEWICZGOPQ", *efmp) != NULL)
384 			fmt_ptr->prefix = *efmp;
385 		    else
386 		    {
387 			sprintf((char *)errmsg,
388 				_("E376: Invalid %%%c in format string prefix"), *efmp);
389 			EMSG(errmsg);
390 			goto error2;
391 		    }
392 		}
393 		else
394 		{
395 		    sprintf((char *)errmsg,
396 			    _("E377: Invalid %%%c in format string"), *efmp);
397 		    EMSG(errmsg);
398 		    goto error2;
399 		}
400 	    }
401 	    else			/* copy normal character */
402 	    {
403 		if (*efmp == '\\' && efmp + 1 < efm + len)
404 		    ++efmp;
405 		else if (vim_strchr((char_u *)".*^$~[", *efmp) != NULL)
406 		    *ptr++ = '\\';	/* escape regexp atoms */
407 		if (*efmp)
408 		    *ptr++ = *efmp;
409 	    }
410 	}
411 	*ptr++ = '$';
412 	*ptr = NUL;
413 	if ((fmt_ptr->prog = vim_regcomp(fmtstr, RE_MAGIC + RE_STRING)) == NULL)
414 	    goto error2;
415 	/*
416 	 * Advance to next part
417 	 */
418 	efm = skip_to_option_part(efm + len);	/* skip comma and spaces */
419     }
420     if (fmt_first == NULL)	/* nothing found */
421     {
422 	EMSG(_("E378: 'errorformat' contains no pattern"));
423 	goto error2;
424     }
425 
426     /*
427      * got_int is reset here, because it was probably set when killing the
428      * ":make" command, but we still want to read the errorfile then.
429      */
430     got_int = FALSE;
431 
432     /* Always ignore case when looking for a matching error. */
433     regmatch.rm_ic = TRUE;
434 
435     /*
436      * Read the lines in the error file one by one.
437      * Try to recognize one of the error formats in each line.
438      */
439     while (!got_int)
440     {
441 	/* Get the next line. */
442 	if (fd == NULL)
443 	{
444 	    if (buflnum > lnumlast)
445 		break;
446 	    STRNCPY(IObuff, ml_get_buf(buf, buflnum++, FALSE), CMDBUFFSIZE - 2);
447 	}
448 	else if (fgets((char *)IObuff, CMDBUFFSIZE - 2, fd) == NULL)
449 	    break;
450 
451 	IObuff[CMDBUFFSIZE - 2] = NUL;  /* for very long lines */
452 	if ((efmp = vim_strrchr(IObuff, '\n')) != NULL)
453 	    *efmp = NUL;
454 #ifdef USE_CRNL
455 	if ((efmp = vim_strrchr(IObuff, '\r')) != NULL)
456 	    *efmp = NUL;
457 #endif
458 
459 	/*
460 	 * Try to match each part of 'errorformat' until we find a complete
461 	 * match or no match.
462 	 */
463 	valid = TRUE;
464 restofline:
465 	for (fmt_ptr = fmt_first; fmt_ptr != NULL; fmt_ptr = fmt_ptr->next)
466 	{
467 	    idx = fmt_ptr->prefix;
468 	    if (multiscan && vim_strchr((char_u *)"OPQ", idx) == NULL)
469 		continue;
470 	    namebuf[0] = NUL;
471 	    pattern[0] = NUL;
472 	    if (!multiscan)
473 		errmsg[0] = NUL;
474 	    lnum = 0;
475 	    col = 0;
476 	    use_viscol = FALSE;
477 	    enr = -1;
478 	    type = 0;
479 	    tail = NULL;
480 
481 	    regmatch.regprog = fmt_ptr->prog;
482 	    if (vim_regexec(&regmatch, IObuff, (colnr_T)0))
483 	    {
484 		if ((idx == 'C' || idx == 'Z') && !multiline)
485 		    continue;
486 		if (vim_strchr((char_u *)"EWI", idx) != NULL)
487 		    type = idx;
488 		else
489 		    type = 0;
490 		/*
491 		 * Extract error message data from matched line
492 		 */
493 		if ((i = (int)fmt_ptr->addr[0]) > 0)		/* %f */
494 		{
495 		    int c = *regmatch.endp[i];
496 
497 		    /* Expand ~/file and $HOME/file to full path. */
498 		    *regmatch.endp[i] = NUL;
499 		    expand_env(regmatch.startp[i], namebuf, CMDBUFFSIZE);
500 		    *regmatch.endp[i] = c;
501 
502 		    if (vim_strchr((char_u *)"OPQ", idx) != NULL
503 						&& mch_getperm(namebuf) == -1)
504 			continue;
505 		}
506 		if ((i = (int)fmt_ptr->addr[1]) > 0)		/* %n */
507 		    enr = (int)atol((char *)regmatch.startp[i]);
508 		if ((i = (int)fmt_ptr->addr[2]) > 0)		/* %l */
509 		    lnum = atol((char *)regmatch.startp[i]);
510 		if ((i = (int)fmt_ptr->addr[3]) > 0)		/* %c */
511 		    col = (int)atol((char *)regmatch.startp[i]);
512 		if ((i = (int)fmt_ptr->addr[4]) > 0)		/* %t */
513 		    type = *regmatch.startp[i];
514 		if (fmt_ptr->flags ==  '+' && !multiscan)	/* %+ */
515 		    STRCPY(errmsg, IObuff);
516 		else if ((i = (int)fmt_ptr->addr[5]) > 0)	/* %m */
517 		{
518 		    len = (int)(regmatch.endp[i] - regmatch.startp[i]);
519 		    STRNCPY(errmsg, regmatch.startp[i], len);
520 		    errmsg[len] = NUL;
521 		}
522 		if ((i = (int)fmt_ptr->addr[6]) > 0)		/* %r */
523 		    tail = regmatch.startp[i];
524 		if ((i = (int)fmt_ptr->addr[7]) > 0)		/* %p */
525 		{
526 		    col = (int)(regmatch.endp[i] - regmatch.startp[i] + 1);
527 		    if (*((char_u *)regmatch.startp[i]) != TAB)
528 			use_viscol = TRUE;
529 		}
530 		if ((i = (int)fmt_ptr->addr[8]) > 0)		/* %v */
531 		{
532 		    col = (int)atol((char *)regmatch.startp[i]);
533 		    use_viscol = TRUE;
534 		}
535 		if ((i = (int)fmt_ptr->addr[9]) > 0)		/* %s */
536 		{
537 		    len = (int)(regmatch.endp[i] - regmatch.startp[i]);
538 		    if (len > CMDBUFFSIZE - 5)
539 			len = CMDBUFFSIZE - 5;
540 		    STRCPY(pattern, "^\\V");
541 		    STRNCAT(pattern, regmatch.startp[i], len);
542 		    pattern[len + 3] = '\\';
543 		    pattern[len + 4] = '$';
544 		    pattern[len + 5] = NUL;
545 		}
546 		break;
547 	    }
548 	}
549 	multiscan = FALSE;
550 	if (!fmt_ptr || idx == 'D' || idx == 'X')
551 	{
552 	    if (fmt_ptr)
553 	    {
554 		if (idx == 'D')				/* enter directory */
555 		{
556 		    if (*namebuf == NUL)
557 		    {
558 			EMSG(_("E379: Missing or empty directory name"));
559 			goto error2;
560 		    }
561 		    if ((directory = qf_push_dir(namebuf, &dir_stack)) == NULL)
562 			goto error2;
563 		}
564 		else if (idx == 'X')			/* leave directory */
565 		    directory = qf_pop_dir(&dir_stack);
566 	    }
567 	    namebuf[0] = NUL;		/* no match found, remove file name */
568 	    lnum = 0;			/* don't jump to this line */
569 	    valid = FALSE;
570 	    STRCPY(errmsg, IObuff);	/* copy whole line to error message */
571 	    if (!fmt_ptr)
572 		multiline = multiignore = FALSE;
573 	}
574 	else if (fmt_ptr)
575 	{
576 	    if (vim_strchr((char_u *)"AEWI", idx) != NULL)
577 		multiline = TRUE;	/* start of a multi-line message */
578 	    else if (vim_strchr((char_u *)"CZ", idx) != NULL)
579 	    {				/* continuation of multi-line msg */
580 		if (qfprev == NULL)
581 		    goto error2;
582 		if (*errmsg && !multiignore)
583 		{
584 		    len = (int)STRLEN(qfprev->qf_text);
585 		    if ((ptr = alloc((unsigned)(len + STRLEN(errmsg) + 2)))
586 								    == NULL)
587 			goto error2;
588 		    STRCPY(ptr, qfprev->qf_text);
589 		    vim_free(qfprev->qf_text);
590 		    qfprev->qf_text = ptr;
591 		    *(ptr += len) = '\n';
592 		    STRCPY(++ptr, errmsg);
593 		}
594 		if (qfprev->qf_nr == -1)
595 		    qfprev->qf_nr = enr;
596 		if (vim_isprintc(type) && !qfprev->qf_type)
597 		    qfprev->qf_type = type;  /* only printable chars allowed */
598 		if (!qfprev->qf_lnum)
599 		    qfprev->qf_lnum = lnum;
600 		if (!qfprev->qf_col)
601 		    qfprev->qf_col = col;
602 		qfprev->qf_viscol = use_viscol;
603 		if (!qfprev->qf_fnum)
604 		    qfprev->qf_fnum = qf_get_fnum(directory,
605 					*namebuf || directory ? namebuf
606 					  : currfile && valid ? currfile : 0);
607 		if (idx == 'Z')
608 		    multiline = multiignore = FALSE;
609 		line_breakcheck();
610 		continue;
611 	    }
612 	    else if (vim_strchr((char_u *)"OPQ", idx) != NULL)
613 	    {
614 		/* global file names */
615 		valid = FALSE;
616 		if (*namebuf == NUL || mch_getperm(namebuf) >= 0)
617 		{
618 		    if (*namebuf && idx == 'P')
619 			currfile = qf_push_dir(namebuf, &file_stack);
620 		    else if (idx == 'Q')
621 			currfile = qf_pop_dir(&file_stack);
622 		    *namebuf = NUL;
623 		    if (tail && *tail)
624 		    {
625 			STRCPY(IObuff, skipwhite(tail));
626 			multiscan = TRUE;
627 			goto restofline;
628 		    }
629 		}
630 	    }
631 	    if (fmt_ptr->flags == '-')	/* generally exclude this line */
632 	    {
633 		if (multiline)
634 		    multiignore = TRUE;	/* also exclude continuation lines */
635 		continue;
636 	    }
637 	}
638 
639 	if (qf_add_entry(&qfprev,
640 			directory,
641 			(*namebuf || directory)
642 			    ? namebuf
643 			    : ((currfile && valid) ? currfile : (char_u *)NULL),
644 			errmsg,
645 			lnum,
646 			col,
647 			use_viscol,
648 			pattern,
649 			enr,
650 			type,
651 			valid) == FAIL)
652 	    goto error2;
653 	line_breakcheck();
654     }
655     if (fd == NULL || !ferror(fd))
656     {
657 	if (qf_lists[qf_curlist].qf_index == 0)	/* no valid entry found */
658 	{
659 	    qf_lists[qf_curlist].qf_ptr = qf_lists[qf_curlist].qf_start;
660 	    qf_lists[qf_curlist].qf_index = 1;
661 	    qf_lists[qf_curlist].qf_nonevalid = TRUE;
662 	}
663 	else
664 	{
665 	    qf_lists[qf_curlist].qf_nonevalid = FALSE;
666 	    if (qf_lists[qf_curlist].qf_ptr == NULL)
667 		qf_lists[qf_curlist].qf_ptr = qf_lists[qf_curlist].qf_start;
668 	}
669 	retval = qf_lists[qf_curlist].qf_count;	/* return number of matches */
670 	goto qf_init_ok;
671     }
672     EMSG(_(e_readerrf));
673 error2:
674     qf_free(qf_curlist);
675     qf_listcount--;
676     if (qf_curlist > 0)
677 	--qf_curlist;
678 qf_init_ok:
679     if (fd != NULL)
680 	fclose(fd);
681     for (fmt_ptr = fmt_first; fmt_ptr != NULL; fmt_ptr = fmt_first)
682     {
683 	fmt_first = fmt_ptr->next;
684 	vim_free(fmt_ptr->prog);
685 	vim_free(fmt_ptr);
686     }
687     qf_clean_dir_stack(&dir_stack);
688     qf_clean_dir_stack(&file_stack);
689 qf_init_end:
690     vim_free(namebuf);
691     vim_free(errmsg);
692     vim_free(pattern);
693     vim_free(fmtstr);
694 
695 #ifdef FEAT_WINDOWS
696     qf_update_buffer();
697 #endif
698 
699     return retval;
700 }
701 
702 /*
703  * Prepare for adding a new quickfix list.
704  */
705     static void
706 qf_new_list()
707 {
708     int		i;
709 
710     /*
711      * If the current entry is not the last entry, delete entries below
712      * the current entry.  This makes it possible to browse in a tree-like
713      * way with ":grep'.
714      */
715     while (qf_listcount > qf_curlist + 1)
716 	qf_free(--qf_listcount);
717 
718     /*
719      * When the stack is full, remove to oldest entry
720      * Otherwise, add a new entry.
721      */
722     if (qf_listcount == LISTCOUNT)
723     {
724 	qf_free(0);
725 	for (i = 1; i < LISTCOUNT; ++i)
726 	    qf_lists[i - 1] = qf_lists[i];
727 	qf_curlist = LISTCOUNT - 1;
728     }
729     else
730 	qf_curlist = qf_listcount++;
731     qf_lists[qf_curlist].qf_index = 0;
732     qf_lists[qf_curlist].qf_count = 0;
733 }
734 
735 #if defined(EXITFREE) || defined(PROTO)
736     void
737 qf_free_all()
738 {
739     int		i;
740 
741     for (i = 0; i < qf_listcount; ++i)
742 	qf_free(i);
743 }
744 #endif
745 
746 /*
747  * Add an entry to the end of the list of errors.
748  * Returns OK or FAIL.
749  */
750     static int
751 qf_add_entry(prevp, dir, fname, mesg, lnum, col, vis_col, pattern, nr, type,
752 	     valid)
753     qfline_T	**prevp;	/* pointer to previously added entry or NULL */
754     char_u	*dir;		/* optional directory name */
755     char_u	*fname;		/* file name or NULL */
756     char_u	*mesg;		/* message */
757     long	lnum;		/* line number */
758     int		col;		/* column */
759     int		vis_col;	/* using visual column */
760     char_u	*pattern;	/* search pattern */
761     int		nr;		/* error number */
762     int		type;		/* type character */
763     int		valid;		/* valid entry */
764 {
765     qfline_T	*qfp;
766 
767     if ((qfp = (qfline_T *)alloc((unsigned)sizeof(qfline_T))) == NULL)
768 	return FAIL;
769     qfp->qf_fnum = qf_get_fnum(dir, fname);
770     if ((qfp->qf_text = vim_strsave(mesg)) == NULL)
771     {
772 	vim_free(qfp);
773 	return FAIL;
774     }
775     qfp->qf_lnum = lnum;
776     qfp->qf_col = col;
777     qfp->qf_viscol = vis_col;
778     if (pattern == NULL || *pattern == NUL)
779 	qfp->qf_pattern = NULL;
780     else if ((qfp->qf_pattern = vim_strsave(pattern)) == NULL)
781     {
782 	vim_free(qfp->qf_text);
783 	vim_free(qfp);
784 	return FAIL;
785     }
786     qfp->qf_nr = nr;
787     if (type != 1 && !vim_isprintc(type)) /* only printable chars allowed */
788 	type = 0;
789     qfp->qf_type = type;
790     qfp->qf_valid = valid;
791 
792     if (qf_lists[qf_curlist].qf_count == 0)	/* first element in the list */
793     {
794 	qf_lists[qf_curlist].qf_start = qfp;
795 	qfp->qf_prev = qfp;	/* first element points to itself */
796     }
797     else
798     {
799 	qfp->qf_prev = *prevp;
800 	(*prevp)->qf_next = qfp;
801     }
802     qfp->qf_next = qfp;	/* last element points to itself */
803     qfp->qf_cleared = FALSE;
804     *prevp = qfp;
805     ++qf_lists[qf_curlist].qf_count;
806     if (qf_lists[qf_curlist].qf_index == 0 && qfp->qf_valid)
807 					    /* first valid entry */
808     {
809 	qf_lists[qf_curlist].qf_index = qf_lists[qf_curlist].qf_count;
810 	qf_lists[qf_curlist].qf_ptr = qfp;
811     }
812 
813     return OK;
814 }
815 
816 /*
817  * get buffer number for file "dir.name"
818  */
819     static int
820 qf_get_fnum(directory, fname)
821     char_u   *directory;
822     char_u   *fname;
823 {
824     if (fname == NULL || *fname == NUL)		/* no file name */
825 	return 0;
826     {
827 #ifdef RISCOS
828 	/* Name is reported as `main.c', but file is `c.main' */
829 	return ro_buflist_add(fname);
830 #else
831 	char_u	    *ptr;
832 	int	    fnum;
833 
834 # ifdef VMS
835 	vms_remove_version(fname);
836 # endif
837 # ifdef BACKSLASH_IN_FILENAME
838 	if (directory != NULL)
839 	    slash_adjust(directory);
840 	slash_adjust(fname);
841 # endif
842 	if (directory != NULL && !vim_isAbsName(fname)
843 		&& (ptr = concat_fnames(directory, fname, TRUE)) != NULL)
844 	{
845 	    /*
846 	     * Here we check if the file really exists.
847 	     * This should normally be true, but if make works without
848 	     * "leaving directory"-messages we might have missed a
849 	     * directory change.
850 	     */
851 	    if (mch_getperm(ptr) < 0)
852 	    {
853 		vim_free(ptr);
854 		directory = qf_guess_filepath(fname);
855 		if (directory)
856 		    ptr = concat_fnames(directory, fname, TRUE);
857 		else
858 		    ptr = vim_strsave(fname);
859 	    }
860 	    /* Use concatenated directory name and file name */
861 	    fnum = buflist_add(ptr, 0);
862 	    vim_free(ptr);
863 	    return fnum;
864 	}
865 	return buflist_add(fname, 0);
866 #endif
867     }
868 }
869 
870 /*
871  * push dirbuf onto the directory stack and return pointer to actual dir or
872  * NULL on error
873  */
874     static char_u *
875 qf_push_dir(dirbuf, stackptr)
876     char_u		*dirbuf;
877     struct dir_stack_T	**stackptr;
878 {
879     struct dir_stack_T  *ds_new;
880     struct dir_stack_T  *ds_ptr;
881 
882     /* allocate new stack element and hook it in */
883     ds_new = (struct dir_stack_T *)alloc((unsigned)sizeof(struct dir_stack_T));
884     if (ds_new == NULL)
885 	return NULL;
886 
887     ds_new->next = *stackptr;
888     *stackptr = ds_new;
889 
890     /* store directory on the stack */
891     if (vim_isAbsName(dirbuf)
892 	    || (*stackptr)->next == NULL
893 	    || (*stackptr && dir_stack != *stackptr))
894 	(*stackptr)->dirname = vim_strsave(dirbuf);
895     else
896     {
897 	/* Okay we don't have an absolute path.
898 	 * dirbuf must be a subdir of one of the directories on the stack.
899 	 * Let's search...
900 	 */
901 	ds_new = (*stackptr)->next;
902 	(*stackptr)->dirname = NULL;
903 	while (ds_new)
904 	{
905 	    vim_free((*stackptr)->dirname);
906 	    (*stackptr)->dirname = concat_fnames(ds_new->dirname, dirbuf,
907 		    TRUE);
908 	    if (mch_isdir((*stackptr)->dirname) == TRUE)
909 		break;
910 
911 	    ds_new = ds_new->next;
912 	}
913 
914 	/* clean up all dirs we already left */
915 	while ((*stackptr)->next != ds_new)
916 	{
917 	    ds_ptr = (*stackptr)->next;
918 	    (*stackptr)->next = (*stackptr)->next->next;
919 	    vim_free(ds_ptr->dirname);
920 	    vim_free(ds_ptr);
921 	}
922 
923 	/* Nothing found -> it must be on top level */
924 	if (ds_new == NULL)
925 	{
926 	    vim_free((*stackptr)->dirname);
927 	    (*stackptr)->dirname = vim_strsave(dirbuf);
928 	}
929     }
930 
931     if ((*stackptr)->dirname != NULL)
932 	return (*stackptr)->dirname;
933     else
934     {
935 	ds_ptr = *stackptr;
936 	*stackptr = (*stackptr)->next;
937 	vim_free(ds_ptr);
938 	return NULL;
939     }
940 }
941 
942 
943 /*
944  * pop dirbuf from the directory stack and return previous directory or NULL if
945  * stack is empty
946  */
947     static char_u *
948 qf_pop_dir(stackptr)
949     struct dir_stack_T	**stackptr;
950 {
951     struct dir_stack_T  *ds_ptr;
952 
953     /* TODO: Should we check if dirbuf is the directory on top of the stack?
954      * What to do if it isn't? */
955 
956     /* pop top element and free it */
957     if (*stackptr != NULL)
958     {
959 	ds_ptr = *stackptr;
960 	*stackptr = (*stackptr)->next;
961 	vim_free(ds_ptr->dirname);
962 	vim_free(ds_ptr);
963     }
964 
965     /* return NEW top element as current dir or NULL if stack is empty*/
966     return *stackptr ? (*stackptr)->dirname : NULL;
967 }
968 
969 /*
970  * clean up directory stack
971  */
972     static void
973 qf_clean_dir_stack(stackptr)
974     struct dir_stack_T	**stackptr;
975 {
976     struct dir_stack_T  *ds_ptr;
977 
978     while ((ds_ptr = *stackptr) != NULL)
979     {
980 	*stackptr = (*stackptr)->next;
981 	vim_free(ds_ptr->dirname);
982 	vim_free(ds_ptr);
983     }
984 }
985 
986 /*
987  * Check in which directory of the directory stack the given file can be
988  * found.
989  * Returns a pointer to the directory name or NULL if not found
990  * Cleans up intermediate directory entries.
991  *
992  * TODO: How to solve the following problem?
993  * If we have the this directory tree:
994  *     ./
995  *     ./aa
996  *     ./aa/bb
997  *     ./bb
998  *     ./bb/x.c
999  * and make says:
1000  *     making all in aa
1001  *     making all in bb
1002  *     x.c:9: Error
1003  * Then qf_push_dir thinks we are in ./aa/bb, but we are in ./bb.
1004  * qf_guess_filepath will return NULL.
1005  */
1006     static char_u *
1007 qf_guess_filepath(filename)
1008     char_u *filename;
1009 {
1010     struct dir_stack_T     *ds_ptr;
1011     struct dir_stack_T     *ds_tmp;
1012     char_u		   *fullname;
1013 
1014     /* no dirs on the stack - there's nothing we can do */
1015     if (dir_stack == NULL)
1016 	return NULL;
1017 
1018     ds_ptr = dir_stack->next;
1019     fullname = NULL;
1020     while (ds_ptr)
1021     {
1022 	vim_free(fullname);
1023 	fullname = concat_fnames(ds_ptr->dirname, filename, TRUE);
1024 
1025 	/* If concat_fnames failed, just go on. The worst thing that can happen
1026 	 * is that we delete the entire stack.
1027 	 */
1028 	if ((fullname != NULL) && (mch_getperm(fullname) >= 0))
1029 	    break;
1030 
1031 	ds_ptr = ds_ptr->next;
1032     }
1033 
1034     vim_free(fullname);
1035 
1036     /* clean up all dirs we already left */
1037     while (dir_stack->next != ds_ptr)
1038     {
1039 	ds_tmp = dir_stack->next;
1040 	dir_stack->next = dir_stack->next->next;
1041 	vim_free(ds_tmp->dirname);
1042 	vim_free(ds_tmp);
1043     }
1044 
1045     return ds_ptr==NULL? NULL: ds_ptr->dirname;
1046 
1047 }
1048 
1049 /*
1050  * jump to a quickfix line
1051  * if dir == FORWARD go "errornr" valid entries forward
1052  * if dir == BACKWARD go "errornr" valid entries backward
1053  * if dir == FORWARD_FILE go "errornr" valid entries files backward
1054  * if dir == BACKWARD_FILE go "errornr" valid entries files backward
1055  * else if "errornr" is zero, redisplay the same line
1056  * else go to entry "errornr"
1057  */
1058     void
1059 qf_jump(dir, errornr, forceit)
1060     int		dir;
1061     int		errornr;
1062     int		forceit;
1063 {
1064     qfline_T		*qf_ptr;
1065     qfline_T		*old_qf_ptr;
1066     int			qf_index;
1067     int			old_qf_fnum;
1068     int			old_qf_index;
1069     int			prev_index;
1070     static char_u	*e_no_more_items = (char_u *)N_("E553: No more items");
1071     char_u		*err = e_no_more_items;
1072     linenr_T		i;
1073     buf_T		*old_curbuf;
1074     linenr_T		old_lnum;
1075     char_u		*old_swb = p_swb;
1076     colnr_T		screen_col;
1077     colnr_T		char_col;
1078     char_u		*line;
1079 #ifdef FEAT_WINDOWS
1080     int			opened_window = FALSE;
1081     win_T		*win;
1082     win_T		*altwin;
1083 #endif
1084     int			print_message = TRUE;
1085     int			len;
1086 #ifdef FEAT_FOLDING
1087     int			old_KeyTyped = KeyTyped; /* getting file may reset it */
1088 #endif
1089     int			ok = OK;
1090 
1091     if (qf_curlist >= qf_listcount || qf_lists[qf_curlist].qf_count == 0)
1092     {
1093 	EMSG(_(e_quickfix));
1094 	return;
1095     }
1096 
1097     qf_ptr = qf_lists[qf_curlist].qf_ptr;
1098     old_qf_ptr = qf_ptr;
1099     qf_index = qf_lists[qf_curlist].qf_index;
1100     old_qf_index = qf_index;
1101     if (dir == FORWARD || dir == FORWARD_FILE)	    /* next valid entry */
1102     {
1103 	while (errornr--)
1104 	{
1105 	    old_qf_ptr = qf_ptr;
1106 	    prev_index = qf_index;
1107 	    old_qf_fnum = qf_ptr->qf_fnum;
1108 	    do
1109 	    {
1110 		if (qf_index == qf_lists[qf_curlist].qf_count
1111 						   || qf_ptr->qf_next == NULL)
1112 		{
1113 		    qf_ptr = old_qf_ptr;
1114 		    qf_index = prev_index;
1115 		    if (err != NULL)
1116 		    {
1117 			EMSG(_(err));
1118 			goto theend;
1119 		    }
1120 		    errornr = 0;
1121 		    break;
1122 		}
1123 		++qf_index;
1124 		qf_ptr = qf_ptr->qf_next;
1125 	    } while ((!qf_lists[qf_curlist].qf_nonevalid && !qf_ptr->qf_valid)
1126 		  || (dir == FORWARD_FILE && qf_ptr->qf_fnum == old_qf_fnum));
1127 	    err = NULL;
1128 	}
1129     }
1130     else if (dir == BACKWARD || dir == BACKWARD_FILE)  /* prev. valid entry */
1131     {
1132 	while (errornr--)
1133 	{
1134 	    old_qf_ptr = qf_ptr;
1135 	    prev_index = qf_index;
1136 	    old_qf_fnum = qf_ptr->qf_fnum;
1137 	    do
1138 	    {
1139 		if (qf_index == 1 || qf_ptr->qf_prev == NULL)
1140 		{
1141 		    qf_ptr = old_qf_ptr;
1142 		    qf_index = prev_index;
1143 		    if (err != NULL)
1144 		    {
1145 			EMSG(_(err));
1146 			goto theend;
1147 		    }
1148 		    errornr = 0;
1149 		    break;
1150 		}
1151 		--qf_index;
1152 		qf_ptr = qf_ptr->qf_prev;
1153 	    } while ((!qf_lists[qf_curlist].qf_nonevalid && !qf_ptr->qf_valid)
1154 		  || (dir == BACKWARD_FILE && qf_ptr->qf_fnum == old_qf_fnum));
1155 	    err = NULL;
1156 	}
1157     }
1158     else if (errornr != 0)	/* go to specified number */
1159     {
1160 	while (errornr < qf_index && qf_index > 1 && qf_ptr->qf_prev != NULL)
1161 	{
1162 	    --qf_index;
1163 	    qf_ptr = qf_ptr->qf_prev;
1164 	}
1165 	while (errornr > qf_index && qf_index < qf_lists[qf_curlist].qf_count
1166 						   && qf_ptr->qf_next != NULL)
1167 	{
1168 	    ++qf_index;
1169 	    qf_ptr = qf_ptr->qf_next;
1170 	}
1171     }
1172 
1173 #ifdef FEAT_WINDOWS
1174     qf_lists[qf_curlist].qf_index = qf_index;
1175     if (qf_win_pos_update(old_qf_index))
1176 	/* No need to print the error message if it's visible in the error
1177 	 * window */
1178 	print_message = FALSE;
1179 
1180     /*
1181      * For ":helpgrep" find a help window or open one.
1182      */
1183     if (qf_ptr->qf_type == 1 && !curwin->w_buffer->b_help)
1184     {
1185 	win_T	*wp;
1186 	int	n;
1187 
1188 	for (wp = firstwin; wp != NULL; wp = wp->w_next)
1189 	    if (wp->w_buffer != NULL && wp->w_buffer->b_help)
1190 		break;
1191 	if (wp != NULL && wp->w_buffer->b_nwindows > 0)
1192 	    win_enter(wp, TRUE);
1193 	else
1194 	{
1195 	    /*
1196 	     * Split off help window; put it at far top if no position
1197 	     * specified, the current window is vertically split and narrow.
1198 	     */
1199 	    n = WSP_HELP;
1200 # ifdef FEAT_VERTSPLIT
1201 	    if (cmdmod.split == 0 && curwin->w_width != Columns
1202 						      && curwin->w_width < 80)
1203 		n |= WSP_TOP;
1204 # endif
1205 	    if (win_split(0, n) == FAIL)
1206 		goto theend;
1207 	    opened_window = TRUE;	/* close it when fail */
1208 
1209 	    if (curwin->w_height < p_hh)
1210 		win_setheight((int)p_hh);
1211 	}
1212 
1213 	if (!p_im)
1214 	    restart_edit = 0;	    /* don't want insert mode in help file */
1215     }
1216 
1217     /*
1218      * If currently in the quickfix window, find another window to show the
1219      * file in.
1220      */
1221     if (bt_quickfix(curbuf) && !opened_window)
1222     {
1223 	/*
1224 	 * If there is no file specified, we don't know where to go.
1225 	 * But do advance, otherwise ":cn" gets stuck.
1226 	 */
1227 	if (qf_ptr->qf_fnum == 0)
1228 	    goto theend;
1229 
1230 	/*
1231 	 * If there is only one window, create a new one above the quickfix
1232 	 * window.
1233 	 */
1234 	if (firstwin == lastwin)
1235 	{
1236 	    if (win_split(0, WSP_ABOVE) == FAIL)
1237 		goto failed;		/* not enough room for window */
1238 	    opened_window = TRUE;	/* close it when fail */
1239 	    p_swb = empty_option;	/* don't split again */
1240 # ifdef FEAT_SCROLLBIND
1241 	    curwin->w_p_scb = FALSE;
1242 # endif
1243 	}
1244 	else
1245 	{
1246 	    /*
1247 	     * Try to find a window that shows the right buffer.
1248 	     * Default to the window just above the quickfix buffer.
1249 	     */
1250 	    win = curwin;
1251 	    altwin = NULL;
1252 	    for (;;)
1253 	    {
1254 		if (win->w_buffer->b_fnum == qf_ptr->qf_fnum)
1255 		    break;
1256 		if (win->w_prev == NULL)
1257 		    win = lastwin;	/* wrap around the top */
1258 		else
1259 		    win = win->w_prev;	/* go to previous window */
1260 
1261 		if (bt_quickfix(win->w_buffer))
1262 		{
1263 		    /* Didn't find it, go to the window before the quickfix
1264 		     * window. */
1265 		    if (altwin != NULL)
1266 			win = altwin;
1267 		    else if (curwin->w_prev != NULL)
1268 			win = curwin->w_prev;
1269 		    else
1270 			win = curwin->w_next;
1271 		    break;
1272 		}
1273 
1274 		/* Remember a usable window. */
1275 		if (altwin == NULL && !win->w_p_pvw
1276 					   && win->w_buffer->b_p_bt[0] == NUL)
1277 		    altwin = win;
1278 	    }
1279 
1280 	    win_goto(win);
1281 	}
1282     }
1283 #endif
1284 
1285     /*
1286      * If there is a file name,
1287      * read the wanted file if needed, and check autowrite etc.
1288      */
1289     old_curbuf = curbuf;
1290     old_lnum = curwin->w_cursor.lnum;
1291 
1292     if (qf_ptr->qf_fnum != 0)
1293     {
1294 	if (qf_ptr->qf_type == 1)
1295 	{
1296 	    /* Open help file (do_ecmd() will set b_help flag, readfile() will
1297 	     * set b_p_ro flag). */
1298 	    if (!can_abandon(curbuf, forceit))
1299 	    {
1300 		EMSG(_(e_nowrtmsg));
1301 		ok = FALSE;
1302 	    }
1303 	    else
1304 		ok = do_ecmd(qf_ptr->qf_fnum, NULL, NULL, NULL, (linenr_T)1,
1305 						   ECMD_HIDE + ECMD_SET_HELP);
1306 	}
1307 	else
1308 	    ok = buflist_getfile(qf_ptr->qf_fnum,
1309 			    (linenr_T)1, GETF_SETMARK | GETF_SWITCH, forceit);
1310     }
1311 
1312     if (ok == OK)
1313     {
1314 	/* When not switched to another buffer, still need to set pc mark */
1315 	if (curbuf == old_curbuf)
1316 	    setpcmark();
1317 
1318 	if (qf_ptr->qf_pattern == NULL)
1319 	{
1320 	    /*
1321 	     * Go to line with error, unless qf_lnum is 0.
1322 	     */
1323 	    i = qf_ptr->qf_lnum;
1324 	    if (i > 0)
1325 	    {
1326 		if (i > curbuf->b_ml.ml_line_count)
1327 		    i = curbuf->b_ml.ml_line_count;
1328 		curwin->w_cursor.lnum = i;
1329 	    }
1330 	    if (qf_ptr->qf_col > 0)
1331 	    {
1332 		curwin->w_cursor.col = qf_ptr->qf_col - 1;
1333 		if (qf_ptr->qf_viscol == TRUE)
1334 		{
1335 		    /*
1336 		     * Check each character from the beginning of the error
1337 		     * line up to the error column.  For each tab character
1338 		     * found, reduce the error column value by the length of
1339 		     * a tab character.
1340 		     */
1341 		    line = ml_get_curline();
1342 		    screen_col = 0;
1343 		    for (char_col = 0; char_col < curwin->w_cursor.col; ++char_col)
1344 		    {
1345 			if (*line == NUL)
1346 			    break;
1347 			if (*line++ == '\t')
1348 			{
1349 			    curwin->w_cursor.col -= 7 - (screen_col % 8);
1350 			    screen_col += 8 - (screen_col % 8);
1351 			}
1352 			else
1353 			    ++screen_col;
1354 		    }
1355 		}
1356 		check_cursor();
1357 	    }
1358 	    else
1359 		beginline(BL_WHITE | BL_FIX);
1360 	}
1361 	else
1362 	{
1363 	    pos_T save_cursor;
1364 
1365 	    /* Move the cursor to the first line in the buffer */
1366 	    save_cursor = curwin->w_cursor;
1367 	    curwin->w_cursor.lnum = 0;
1368 	    if (!do_search(NULL, '/', qf_ptr->qf_pattern, (long)1, SEARCH_KEEP))
1369 		curwin->w_cursor = save_cursor;
1370 	}
1371 
1372 #ifdef FEAT_FOLDING
1373 	if ((fdo_flags & FDO_QUICKFIX) && old_KeyTyped)
1374 	    foldOpenCursor();
1375 #endif
1376 	if (print_message)
1377 	{
1378 	    /* Update the screen before showing the message */
1379 	    update_topline_redraw();
1380 	    sprintf((char *)IObuff, _("(%d of %d)%s%s: "), qf_index,
1381 		    qf_lists[qf_curlist].qf_count,
1382 		    qf_ptr->qf_cleared ? _(" (line deleted)") : "",
1383 		    (char *)qf_types(qf_ptr->qf_type, qf_ptr->qf_nr));
1384 	    /* Add the message, skipping leading whitespace and newlines. */
1385 	    len = (int)STRLEN(IObuff);
1386 	    qf_fmt_text(skipwhite(qf_ptr->qf_text), IObuff + len, IOSIZE - len);
1387 
1388 	    /* Output the message.  Overwrite to avoid scrolling when the 'O'
1389 	     * flag is present in 'shortmess'; But when not jumping, print the
1390 	     * whole message. */
1391 	    i = msg_scroll;
1392 	    if (curbuf == old_curbuf && curwin->w_cursor.lnum == old_lnum)
1393 		msg_scroll = TRUE;
1394 	    else if (!msg_scrolled && shortmess(SHM_OVERALL))
1395 		msg_scroll = FALSE;
1396 	    msg_attr_keep(IObuff, 0, TRUE);
1397 	    msg_scroll = i;
1398 	}
1399     }
1400     else
1401     {
1402 #ifdef FEAT_WINDOWS
1403 	if (opened_window)
1404 	    win_close(curwin, TRUE);    /* Close opened window */
1405 #endif
1406 	if (qf_ptr->qf_fnum != 0)
1407 	{
1408 	    /*
1409 	     * Couldn't open file, so put index back where it was.  This could
1410 	     * happen if the file was readonly and we changed something.
1411 	     */
1412 #ifdef FEAT_WINDOWS
1413 failed:
1414 #endif
1415 	    qf_ptr = old_qf_ptr;
1416 	    qf_index = old_qf_index;
1417 	}
1418     }
1419 theend:
1420     qf_lists[qf_curlist].qf_ptr = qf_ptr;
1421     qf_lists[qf_curlist].qf_index = qf_index;
1422 #ifdef FEAT_WINDOWS
1423     if (p_swb != old_swb && opened_window)
1424     {
1425 	/* Restore old 'switchbuf' value, but not when an autocommand or
1426 	 * modeline has changed the value. */
1427 	if (p_swb == empty_option)
1428 	    p_swb = old_swb;
1429 	else
1430 	    free_string_option(old_swb);
1431     }
1432 #endif
1433 }
1434 
1435 /*
1436  * ":clist": list all errors
1437  */
1438     void
1439 qf_list(eap)
1440     exarg_T	*eap;
1441 {
1442     buf_T	*buf;
1443     char_u	*fname;
1444     qfline_T	*qfp;
1445     int		i;
1446     int		idx1 = 1;
1447     int		idx2 = -1;
1448     int		need_return = TRUE;
1449     int		last_printed = 1;
1450     char_u	*arg = eap->arg;
1451     int		all = eap->forceit;	/* if not :cl!, only show
1452 						   recognised errors */
1453 
1454     if (qf_curlist >= qf_listcount || qf_lists[qf_curlist].qf_count == 0)
1455     {
1456 	EMSG(_(e_quickfix));
1457 	return;
1458     }
1459     if (!get_list_range(&arg, &idx1, &idx2) || *arg != NUL)
1460     {
1461 	EMSG(_(e_trailing));
1462 	return;
1463     }
1464     i = qf_lists[qf_curlist].qf_count;
1465     if (idx1 < 0)
1466 	idx1 = (-idx1 > i) ? 0 : idx1 + i + 1;
1467     if (idx2 < 0)
1468 	idx2 = (-idx2 > i) ? 0 : idx2 + i + 1;
1469 
1470     more_back_used = TRUE;
1471     if (qf_lists[qf_curlist].qf_nonevalid)
1472 	all = TRUE;
1473     qfp = qf_lists[qf_curlist].qf_start;
1474     for (i = 1; !got_int && i <= qf_lists[qf_curlist].qf_count; )
1475     {
1476 	if ((qfp->qf_valid || all) && idx1 <= i && i <= idx2)
1477 	{
1478 	    if (need_return)
1479 	    {
1480 		msg_putchar('\n');
1481 		need_return = FALSE;
1482 	    }
1483 	    if (more_back == 0)
1484 	    {
1485 		fname = NULL;
1486 		if (qfp->qf_fnum != 0
1487 			      && (buf = buflist_findnr(qfp->qf_fnum)) != NULL)
1488 		{
1489 		    fname = buf->b_fname;
1490 		    if (qfp->qf_type == 1)	/* :helpgrep */
1491 			fname = gettail(fname);
1492 		}
1493 		if (fname == NULL)
1494 		    sprintf((char *)IObuff, "%2d", i);
1495 		else
1496 		    vim_snprintf((char *)IObuff, IOSIZE, "%2d %s",
1497 							    i, (char *)fname);
1498 		msg_outtrans_attr(IObuff, i == qf_lists[qf_curlist].qf_index
1499 			? hl_attr(HLF_L) : hl_attr(HLF_D));
1500 		if (qfp->qf_lnum == 0)
1501 		    IObuff[0] = NUL;
1502 		else if (qfp->qf_col == 0)
1503 		    sprintf((char *)IObuff, ":%ld", qfp->qf_lnum);
1504 		else
1505 		    sprintf((char *)IObuff, ":%ld col %d",
1506 						   qfp->qf_lnum, qfp->qf_col);
1507 		sprintf((char *)IObuff + STRLEN(IObuff), "%s:",
1508 				  (char *)qf_types(qfp->qf_type, qfp->qf_nr));
1509 		msg_puts_attr(IObuff, hl_attr(HLF_N));
1510 		if (qfp->qf_pattern != NULL)
1511 		{
1512 		    qf_fmt_text(qfp->qf_pattern, IObuff, IOSIZE);
1513 		    STRCAT(IObuff, ":");
1514 		    msg_puts(IObuff);
1515 		}
1516 		msg_puts((char_u *)" ");
1517 
1518 		/* Remove newlines and leading whitespace from the text.
1519 		 * For an unrecognized line keep the indent, the compiler may
1520 		 * mark a word with ^^^^. */
1521 		qf_fmt_text((fname != NULL || qfp->qf_lnum != 0)
1522 				     ? skipwhite(qfp->qf_text) : qfp->qf_text,
1523 							      IObuff, IOSIZE);
1524 		msg_prt_line(IObuff, FALSE);
1525 		out_flush();		/* show one line at a time */
1526 		need_return = TRUE;
1527 		last_printed = i;
1528 	    }
1529 	}
1530 	if (more_back)
1531 	{
1532 	    /* scrolling backwards from the more-prompt */
1533 	    /* TODO: compute the number of items from the screen lines */
1534 	    more_back = more_back * 2 - 1;
1535 	    while (i > last_printed - more_back && i > idx1)
1536 	    {
1537 		do
1538 		{
1539 		    qfp = qfp->qf_prev;
1540 		    --i;
1541 		}
1542 		while (i > idx1 && !qfp->qf_valid && !all);
1543 	    }
1544 	    more_back = 0;
1545 	}
1546 	else
1547 	{
1548 	    qfp = qfp->qf_next;
1549 	    ++i;
1550 	}
1551 	ui_breakcheck();
1552     }
1553     more_back_used = FALSE;
1554 }
1555 
1556 /*
1557  * Remove newlines and leading whitespace from an error message.
1558  * Put the result in "buf[bufsize]".
1559  */
1560     static void
1561 qf_fmt_text(text, buf, bufsize)
1562     char_u	*text;
1563     char_u	*buf;
1564     int		bufsize;
1565 {
1566     int		i;
1567     char_u	*p = text;
1568 
1569     for (i = 0; *p != NUL && i < bufsize - 1; ++i)
1570     {
1571 	if (*p == '\n')
1572 	{
1573 	    buf[i] = ' ';
1574 	    while (*++p != NUL)
1575 		if (!vim_iswhite(*p) && *p != '\n')
1576 		    break;
1577 	}
1578 	else
1579 	    buf[i] = *p++;
1580     }
1581     buf[i] = NUL;
1582 }
1583 
1584 /*
1585  * ":colder [count]": Up in the quickfix stack.
1586  * ":cnewer [count]": Down in the quickfix stack.
1587  */
1588     void
1589 qf_age(eap)
1590     exarg_T	*eap;
1591 {
1592     int		count;
1593 
1594     if (eap->addr_count != 0)
1595 	count = eap->line2;
1596     else
1597 	count = 1;
1598     while (count--)
1599     {
1600 	if (eap->cmdidx == CMD_colder)
1601 	{
1602 	    if (qf_curlist == 0)
1603 	    {
1604 		EMSG(_("E380: At bottom of quickfix stack"));
1605 		return;
1606 	    }
1607 	    --qf_curlist;
1608 	}
1609 	else
1610 	{
1611 	    if (qf_curlist >= qf_listcount - 1)
1612 	    {
1613 		EMSG(_("E381: At top of quickfix stack"));
1614 		return;
1615 	    }
1616 	    ++qf_curlist;
1617 	}
1618     }
1619     qf_msg();
1620 }
1621 
1622     static void
1623 qf_msg()
1624 {
1625     smsg((char_u *)_("error list %d of %d; %d errors"),
1626 	    qf_curlist + 1, qf_listcount, qf_lists[qf_curlist].qf_count);
1627 #ifdef FEAT_WINDOWS
1628     qf_update_buffer();
1629 #endif
1630 }
1631 
1632 /*
1633  * free the error list
1634  */
1635     static void
1636 qf_free(idx)
1637     int		idx;
1638 {
1639     qfline_T	*qfp;
1640 
1641     while (qf_lists[idx].qf_count)
1642     {
1643 	qfp = qf_lists[idx].qf_start->qf_next;
1644 	vim_free(qf_lists[idx].qf_start->qf_text);
1645 	vim_free(qf_lists[idx].qf_start->qf_pattern);
1646 	vim_free(qf_lists[idx].qf_start);
1647 	qf_lists[idx].qf_start = qfp;
1648 	--qf_lists[idx].qf_count;
1649     }
1650 }
1651 
1652 /*
1653  * qf_mark_adjust: adjust marks
1654  */
1655    void
1656 qf_mark_adjust(line1, line2, amount, amount_after)
1657     linenr_T	line1;
1658     linenr_T	line2;
1659     long	amount;
1660     long	amount_after;
1661 {
1662     int		i;
1663     qfline_T	*qfp;
1664     int		idx;
1665 
1666     for (idx = 0; idx < qf_listcount; ++idx)
1667 	if (qf_lists[idx].qf_count)
1668 	    for (i = 0, qfp = qf_lists[idx].qf_start;
1669 		       i < qf_lists[idx].qf_count; ++i, qfp = qfp->qf_next)
1670 		if (qfp->qf_fnum == curbuf->b_fnum)
1671 		{
1672 		    if (qfp->qf_lnum >= line1 && qfp->qf_lnum <= line2)
1673 		    {
1674 			if (amount == MAXLNUM)
1675 			    qfp->qf_cleared = TRUE;
1676 			else
1677 			    qfp->qf_lnum += amount;
1678 		    }
1679 		    else if (amount_after && qfp->qf_lnum > line2)
1680 			qfp->qf_lnum += amount_after;
1681 		}
1682 }
1683 
1684 /*
1685  * Make a nice message out of the error character and the error number:
1686  *  char    number	message
1687  *  e or E    0		" error"
1688  *  w or W    0		" warning"
1689  *  i or I    0		" info"
1690  *  0	      0		""
1691  *  other     0		" c"
1692  *  e or E    n		" error n"
1693  *  w or W    n		" warning n"
1694  *  i or I    n		" info n"
1695  *  0	      n		" error n"
1696  *  other     n		" c n"
1697  *  1	      x		""	:helpgrep
1698  */
1699     static char_u *
1700 qf_types(c, nr)
1701     int c, nr;
1702 {
1703     static char_u	buf[20];
1704     static char_u	cc[3];
1705     char_u		*p;
1706 
1707     if (c == 'W' || c == 'w')
1708 	p = (char_u *)" warning";
1709     else if (c == 'I' || c == 'i')
1710 	p = (char_u *)" info";
1711     else if (c == 'E' || c == 'e' || (c == 0 && nr > 0))
1712 	p = (char_u *)" error";
1713     else if (c == 0 || c == 1)
1714 	p = (char_u *)"";
1715     else
1716     {
1717 	cc[0] = ' ';
1718 	cc[1] = c;
1719 	cc[2] = NUL;
1720 	p = cc;
1721     }
1722 
1723     if (nr <= 0)
1724 	return p;
1725 
1726     sprintf((char *)buf, "%s %3d", (char *)p, nr);
1727     return buf;
1728 }
1729 
1730 #if defined(FEAT_WINDOWS) || defined(PROTO)
1731 /*
1732  * ":cwindow": open the quickfix window if we have errors to display,
1733  *	       close it if not.
1734  */
1735     void
1736 ex_cwindow(eap)
1737     exarg_T	*eap;
1738 {
1739     win_T	*win;
1740 
1741     /*
1742      * Look for an existing quickfix window.
1743      */
1744     for (win = firstwin; win != NULL; win = win->w_next)
1745 	if (bt_quickfix(win->w_buffer))
1746 	    break;
1747 
1748     /*
1749      * If a quickfix window is open but we have no errors to display,
1750      * close the window.  If a quickfix window is not open, then open
1751      * it if we have errors; otherwise, leave it closed.
1752      */
1753     if (qf_lists[qf_curlist].qf_nonevalid || qf_curlist >= qf_listcount)
1754     {
1755 	if (win != NULL)
1756 	    ex_cclose(eap);
1757     }
1758     else if (win == NULL)
1759 	ex_copen(eap);
1760 }
1761 
1762 /*
1763  * ":cclose": close the window showing the list of errors.
1764  */
1765 /*ARGSUSED*/
1766     void
1767 ex_cclose(eap)
1768     exarg_T	*eap;
1769 {
1770     win_T	*win;
1771 
1772     /*
1773      * Find existing quickfix window and close it.
1774      */
1775     for (win = firstwin; win != NULL; win = win->w_next)
1776 	if (bt_quickfix(win->w_buffer))
1777 	    break;
1778 
1779     if (win != NULL)
1780 	win_close(win, FALSE);
1781 }
1782 
1783 /*
1784  * ":copen": open a window that shows the list of errors.
1785  */
1786     void
1787 ex_copen(eap)
1788     exarg_T	*eap;
1789 {
1790     int		height;
1791     buf_T	*buf;
1792     win_T	*win;
1793 
1794     if (eap->addr_count != 0)
1795 	height = eap->line2;
1796     else
1797 	height = QF_WINHEIGHT;
1798 
1799 #ifdef FEAT_VISUAL
1800     reset_VIsual_and_resel();			/* stop Visual mode */
1801 #endif
1802 #ifdef FEAT_GUI
1803     need_mouse_correct = TRUE;
1804 #endif
1805 
1806     /*
1807      * Find existing quickfix window, or open a new one.
1808      */
1809     for (win = firstwin; win != NULL; win = win->w_next)
1810 	if (bt_quickfix(win->w_buffer))
1811 	    break;
1812     if (win != NULL)
1813 	win_goto(win);
1814     else
1815     {
1816 	/* The current window becomes the previous window afterwards. */
1817 	win = curwin;
1818 
1819 	/* Create the new window at the very bottom. */
1820 	win_goto(lastwin);
1821 	if (win_split(height, WSP_BELOW) == FAIL)
1822 	    return;		/* not enough room for window */
1823 #ifdef FEAT_SCROLLBIND
1824 	curwin->w_p_scb = FALSE;
1825 #endif
1826 
1827 	/*
1828 	 * Find existing quickfix buffer, or create a new one.
1829 	 */
1830 	buf = qf_find_buf();
1831 	if (buf == NULL)
1832 	{
1833 	    (void)do_ecmd(0, NULL, NULL, NULL, ECMD_ONE, ECMD_HIDE);
1834 	    /* switch off 'swapfile' */
1835 	    set_option_value((char_u *)"swf", 0L, NULL, OPT_LOCAL);
1836 	    set_option_value((char_u *)"bt", 0L, (char_u *)"quickfix",
1837 								   OPT_LOCAL);
1838 	    set_option_value((char_u *)"bh", 0L, (char_u *)"delete", OPT_LOCAL);
1839 	    set_option_value((char_u *)"diff", 0L, (char_u *)"", OPT_LOCAL);
1840 	}
1841 	else if (buf != curbuf)
1842 	    set_curbuf(buf, DOBUF_GOTO);
1843 
1844 #ifdef FEAT_VERTSPLIT
1845 	/* Only set the height when there is no window to the side. */
1846 	if (curwin->w_width == Columns)
1847 #endif
1848 	    win_setheight(height);
1849 	curwin->w_p_wfh = TRUE;	    /* set 'winfixheight' */
1850 	if (win_valid(win))
1851 	    prevwin = win;
1852     }
1853 
1854     /*
1855      * Fill the buffer with the quickfix list.
1856      */
1857     qf_fill_buffer();
1858 
1859     curwin->w_cursor.lnum = qf_lists[qf_curlist].qf_index;
1860     curwin->w_cursor.col = 0;
1861     check_cursor();
1862     update_topline();		/* scroll to show the line */
1863 }
1864 
1865 /*
1866  * Return the number of the current entry (line number in the quickfix
1867  * window).
1868  */
1869      linenr_T
1870 qf_current_entry()
1871 {
1872     return qf_lists[qf_curlist].qf_index;
1873 }
1874 
1875 /*
1876  * Update the cursor position in the quickfix window to the current error.
1877  * Return TRUE if there is a quickfix window.
1878  */
1879     static int
1880 qf_win_pos_update(old_qf_index)
1881     int		old_qf_index;	/* previous qf_index or zero */
1882 {
1883     win_T	*win;
1884     int		qf_index = qf_lists[qf_curlist].qf_index;
1885 
1886     /*
1887      * Put the cursor on the current error in the quickfix window, so that
1888      * it's viewable.
1889      */
1890     for (win = firstwin; win != NULL; win = win->w_next)
1891 	if (bt_quickfix(win->w_buffer))
1892 	    break;
1893     if (win != NULL
1894 	    && qf_index <= win->w_buffer->b_ml.ml_line_count
1895 	    && old_qf_index != qf_index)
1896     {
1897 	win_T	*old_curwin = curwin;
1898 
1899 	curwin = win;
1900 	curbuf = win->w_buffer;
1901 	if (qf_index > old_qf_index)
1902 	{
1903 	    curwin->w_redraw_top = old_qf_index;
1904 	    curwin->w_redraw_bot = qf_index;
1905 	}
1906 	else
1907 	{
1908 	    curwin->w_redraw_top = qf_index;
1909 	    curwin->w_redraw_bot = old_qf_index;
1910 	}
1911 	curwin->w_cursor.lnum = qf_index;
1912 	curwin->w_cursor.col = 0;
1913 	update_topline();		/* scroll to show the line */
1914 	redraw_later(VALID);
1915 	curwin->w_redr_status = TRUE;	/* update ruler */
1916 	curwin = old_curwin;
1917 	curbuf = curwin->w_buffer;
1918     }
1919     return win != NULL;
1920 }
1921 
1922 /*
1923  * Find quickfix buffer.
1924  */
1925     static buf_T *
1926 qf_find_buf()
1927 {
1928     buf_T	*buf;
1929 
1930     for (buf = firstbuf; buf != NULL; buf = buf->b_next)
1931 	if (bt_quickfix(buf))
1932 	    break;
1933     return buf;
1934 }
1935 
1936 /*
1937  * Find the quickfix buffer.  If it exists, update the contents.
1938  */
1939     static void
1940 qf_update_buffer()
1941 {
1942     buf_T	*buf;
1943 #ifdef FEAT_AUTOCMD
1944     aco_save_T	aco;
1945 #else
1946     buf_T	*save_curbuf;
1947 #endif
1948 
1949     /* Check if a buffer for the quickfix list exists.  Update it. */
1950     buf = qf_find_buf();
1951     if (buf != NULL)
1952     {
1953 #ifdef FEAT_AUTOCMD
1954 	/* set curwin/curbuf to buf and save a few things */
1955 	aucmd_prepbuf(&aco, buf);
1956 #else
1957 	save_curbuf = curbuf;
1958 	curbuf = buf;
1959 #endif
1960 
1961 	qf_fill_buffer();
1962 
1963 #ifdef FEAT_AUTOCMD
1964 	/* restore curwin/curbuf and a few other things */
1965 	aucmd_restbuf(&aco);
1966 #else
1967 	curbuf = save_curbuf;
1968 #endif
1969 
1970 	(void)qf_win_pos_update(0);
1971     }
1972 }
1973 
1974 /*
1975  * Fill current buffer with quickfix errors, replacing any previous contents.
1976  * curbuf must be the quickfix buffer!
1977  */
1978     static void
1979 qf_fill_buffer()
1980 {
1981     linenr_T	lnum;
1982     qfline_T	*qfp;
1983     buf_T	*errbuf;
1984     int		len;
1985     int		old_KeyTyped = KeyTyped;
1986 
1987     /* delete all existing lines */
1988     while ((curbuf->b_ml.ml_flags & ML_EMPTY) == 0)
1989 	(void)ml_delete((linenr_T)1, FALSE);
1990 
1991     /* Check if there is anything to display */
1992     if (qf_curlist < qf_listcount)
1993     {
1994 	/* Add one line for each error */
1995 	qfp = qf_lists[qf_curlist].qf_start;
1996 	for (lnum = 0; lnum < qf_lists[qf_curlist].qf_count; ++lnum)
1997 	{
1998 	    if (qfp->qf_fnum != 0
1999 		    && (errbuf = buflist_findnr(qfp->qf_fnum)) != NULL
2000 		    && errbuf->b_fname != NULL)
2001 	    {
2002 		if (qfp->qf_type == 1)	/* :helpgrep */
2003 		    STRCPY(IObuff, gettail(errbuf->b_fname));
2004 		else
2005 		    STRCPY(IObuff, errbuf->b_fname);
2006 		len = (int)STRLEN(IObuff);
2007 	    }
2008 	    else
2009 		len = 0;
2010 	    IObuff[len++] = '|';
2011 
2012 	    if (qfp->qf_lnum > 0)
2013 	    {
2014 		sprintf((char *)IObuff + len, "%ld", qfp->qf_lnum);
2015 		len += (int)STRLEN(IObuff + len);
2016 
2017 		if (qfp->qf_col > 0)
2018 		{
2019 		    sprintf((char *)IObuff + len, " col %d", qfp->qf_col);
2020 		    len += (int)STRLEN(IObuff + len);
2021 		}
2022 
2023 		sprintf((char *)IObuff + len, "%s",
2024 				  (char *)qf_types(qfp->qf_type, qfp->qf_nr));
2025 		len += (int)STRLEN(IObuff + len);
2026 	    }
2027 	    else if (qfp->qf_pattern != NULL)
2028 	    {
2029 		qf_fmt_text(qfp->qf_pattern, IObuff + len, IOSIZE - len);
2030 		len += (int)STRLEN(IObuff + len);
2031 	    }
2032 	    IObuff[len++] = '|';
2033 	    IObuff[len++] = ' ';
2034 
2035 	    /* Remove newlines and leading whitespace from the text.
2036 	     * For an unrecognized line keep the indent, the compiler may
2037 	     * mark a word with ^^^^. */
2038 	    qf_fmt_text(len > 3 ? skipwhite(qfp->qf_text) : qfp->qf_text,
2039 						  IObuff + len, IOSIZE - len);
2040 
2041 	    if (ml_append(lnum, IObuff, (colnr_T)STRLEN(IObuff) + 1, FALSE)
2042 								      == FAIL)
2043 		break;
2044 	    qfp = qfp->qf_next;
2045 	}
2046 	/* Delete the empty line which is now at the end */
2047 	(void)ml_delete(lnum + 1, FALSE);
2048     }
2049 
2050     /* correct cursor position */
2051     check_lnums(TRUE);
2052 
2053     /* Set the 'filetype' to "qf" each time after filling the buffer.  This
2054      * resembles reading a file into a buffer, it's more logical when using
2055      * autocommands. */
2056     set_option_value((char_u *)"ft", 0L, (char_u *)"qf", OPT_LOCAL);
2057     curbuf->b_p_ma = FALSE;
2058 
2059 #ifdef FEAT_AUTOCMD
2060     apply_autocmds(EVENT_BUFREADPOST, (char_u *)"quickfix", NULL,
2061 							       FALSE, curbuf);
2062     apply_autocmds(EVENT_BUFWINENTER, (char_u *)"quickfix", NULL,
2063 							       FALSE, curbuf);
2064 #endif
2065 
2066     /* make sure it will be redrawn */
2067     redraw_curbuf_later(NOT_VALID);
2068 
2069     /* Restore KeyTyped, setting 'filetype' may reset it. */
2070     KeyTyped = old_KeyTyped;
2071 }
2072 
2073 #endif /* FEAT_WINDOWS */
2074 
2075 /*
2076  * Return TRUE if "buf" is the quickfix buffer.
2077  */
2078     int
2079 bt_quickfix(buf)
2080     buf_T	*buf;
2081 {
2082     return (buf->b_p_bt[0] == 'q');
2083 }
2084 
2085 /*
2086  * Return TRUE if "buf" is a "nofile" or "acwrite" buffer.
2087  * This means the buffer name is not a file name.
2088  */
2089     int
2090 bt_nofile(buf)
2091     buf_T	*buf;
2092 {
2093     return (buf->b_p_bt[0] == 'n' && buf->b_p_bt[2] == 'f')
2094 	    || buf->b_p_bt[0] == 'a';
2095 }
2096 
2097 /*
2098  * Return TRUE if "buf" is a "nowrite" or "nofile" buffer.
2099  */
2100     int
2101 bt_dontwrite(buf)
2102     buf_T	*buf;
2103 {
2104     return (buf->b_p_bt[0] == 'n');
2105 }
2106 
2107     int
2108 bt_dontwrite_msg(buf)
2109     buf_T	*buf;
2110 {
2111     if (bt_dontwrite(buf))
2112     {
2113 	EMSG(_("E382: Cannot write, 'buftype' option is set"));
2114 	return TRUE;
2115     }
2116     return FALSE;
2117 }
2118 
2119 /*
2120  * Return TRUE if the buffer should be hidden, according to 'hidden', ":hide"
2121  * and 'bufhidden'.
2122  */
2123     int
2124 buf_hide(buf)
2125     buf_T	*buf;
2126 {
2127     /* 'bufhidden' overrules 'hidden' and ":hide", check it first */
2128     switch (buf->b_p_bh[0])
2129     {
2130 	case 'u':		    /* "unload" */
2131 	case 'w':		    /* "wipe" */
2132 	case 'd': return FALSE;	    /* "delete" */
2133 	case 'h': return TRUE;	    /* "hide" */
2134     }
2135     return (p_hid || cmdmod.hide);
2136 }
2137 
2138 /*
2139  * Return TRUE when using ":vimgrep" for ":grep".
2140  */
2141     int
2142 grep_internal(cmdidx)
2143     cmdidx_T	cmdidx;
2144 {
2145     return ((cmdidx == CMD_grep || cmdidx == CMD_grepadd)
2146 	    && STRCMP("internal",
2147 			*curbuf->b_p_gp == NUL ? p_gp : curbuf->b_p_gp) == 0);
2148 }
2149 
2150 /*
2151  * Used for ":make", ":grep" and ":grepadd".
2152  */
2153     void
2154 ex_make(eap)
2155     exarg_T	*eap;
2156 {
2157     char_u	*fname;
2158     char_u	*cmd;
2159     unsigned	len;
2160 #ifdef FEAT_AUTOCMD
2161     char_u	*au_name = NULL;
2162 
2163     switch (eap->cmdidx)
2164     {
2165 	case CMD_make: au_name = (char_u *)"make"; break;
2166 	case CMD_grep: au_name = (char_u *)"grep"; break;
2167 	case CMD_grepadd: au_name = (char_u *)"grepadd"; break;
2168 	default: break;
2169     }
2170     if (au_name != NULL)
2171     {
2172 	apply_autocmds(EVENT_QUICKFIXCMDPRE, au_name,
2173 					       curbuf->b_fname, TRUE, curbuf);
2174 	if (did_throw || force_abort)
2175 	    return;
2176     }
2177 #endif
2178 
2179     /* Redirect ":grep" to ":vimgrep" if 'grepprg' is "internal". */
2180     if (grep_internal(eap->cmdidx))
2181     {
2182 	ex_vimgrep(eap);
2183 	return;
2184     }
2185 
2186     autowrite_all();
2187     fname = get_mef_name();
2188     if (fname == NULL)
2189 	return;
2190     mch_remove(fname);	    /* in case it's not unique */
2191 
2192     /*
2193      * If 'shellpipe' empty: don't redirect to 'errorfile'.
2194      */
2195     len = (unsigned)STRLEN(p_shq) * 2 + (unsigned)STRLEN(eap->arg) + 1;
2196     if (*p_sp != NUL)
2197 	len += (unsigned)STRLEN(p_sp) + (unsigned)STRLEN(fname) + 3;
2198     cmd = alloc(len);
2199     if (cmd == NULL)
2200 	return;
2201     sprintf((char *)cmd, "%s%s%s", (char *)p_shq, (char *)eap->arg,
2202 							       (char *)p_shq);
2203     if (*p_sp != NUL)
2204 	append_redir(cmd, p_sp, fname);
2205     /*
2206      * Output a newline if there's something else than the :make command that
2207      * was typed (in which case the cursor is in column 0).
2208      */
2209     if (msg_col == 0)
2210 	msg_didout = FALSE;
2211     msg_start();
2212     MSG_PUTS(":!");
2213     msg_outtrans(cmd);		/* show what we are doing */
2214 
2215     /* let the shell know if we are redirecting output or not */
2216     do_shell(cmd, *p_sp != NUL ? SHELL_DOOUT : 0);
2217 
2218 #ifdef AMIGA
2219     out_flush();
2220 		/* read window status report and redraw before message */
2221     (void)char_avail();
2222 #endif
2223 
2224     if (qf_init(fname, eap->cmdidx != CMD_make ? p_gefm : p_efm,
2225 					       eap->cmdidx != CMD_grepadd) > 0
2226 	    && !eap->forceit)
2227 	qf_jump(0, 0, FALSE);		/* display first error */
2228 
2229     mch_remove(fname);
2230     vim_free(fname);
2231     vim_free(cmd);
2232 
2233 #ifdef FEAT_AUTOCMD
2234     if (au_name != NULL)
2235 	apply_autocmds(EVENT_QUICKFIXCMDPOST, au_name,
2236 					       curbuf->b_fname, TRUE, curbuf);
2237 #endif
2238 }
2239 
2240 /*
2241  * Return the name for the errorfile, in allocated memory.
2242  * Find a new unique name when 'makeef' contains "##".
2243  * Returns NULL for error.
2244  */
2245     static char_u *
2246 get_mef_name()
2247 {
2248     char_u	*p;
2249     char_u	*name;
2250     static int	start = -1;
2251     static int	off = 0;
2252 #ifdef HAVE_LSTAT
2253     struct stat	sb;
2254 #endif
2255 
2256     if (*p_mef == NUL)
2257     {
2258 	name = vim_tempname('e');
2259 	if (name == NULL)
2260 	    EMSG(_(e_notmp));
2261 	return name;
2262     }
2263 
2264     for (p = p_mef; *p; ++p)
2265 	if (p[0] == '#' && p[1] == '#')
2266 	    break;
2267 
2268     if (*p == NUL)
2269 	return vim_strsave(p_mef);
2270 
2271     /* Keep trying until the name doesn't exist yet. */
2272     for (;;)
2273     {
2274 	if (start == -1)
2275 	    start = mch_get_pid();
2276 	else
2277 	    off += 19;
2278 
2279 	name = alloc((unsigned)STRLEN(p_mef) + 30);
2280 	if (name == NULL)
2281 	    break;
2282 	STRCPY(name, p_mef);
2283 	sprintf((char *)name + (p - p_mef), "%d%d", start, off);
2284 	STRCAT(name, p + 2);
2285 	if (mch_getperm(name) < 0
2286 #ifdef HAVE_LSTAT
2287 		    /* Don't accept a symbolic link, its a security risk. */
2288 		    && mch_lstat((char *)name, &sb) < 0
2289 #endif
2290 		)
2291 	    break;
2292 	vim_free(name);
2293     }
2294     return name;
2295 }
2296 
2297 /*
2298  * ":cc", ":crewind", ":cfirst" and ":clast".
2299  */
2300     void
2301 ex_cc(eap)
2302     exarg_T	*eap;
2303 {
2304     qf_jump(0,
2305 	    eap->addr_count > 0
2306 	    ? (int)eap->line2
2307 	    : eap->cmdidx == CMD_cc
2308 		? 0
2309 		: (eap->cmdidx == CMD_crewind || eap->cmdidx == CMD_cfirst)
2310 		    ? 1
2311 		    : 32767,
2312 	    eap->forceit);
2313 }
2314 
2315 /*
2316  * ":cnext", ":cnfile", ":cNext" and ":cprevious".
2317  */
2318     void
2319 ex_cnext(eap)
2320     exarg_T	*eap;
2321 {
2322     qf_jump(eap->cmdidx == CMD_cnext
2323 	    ? FORWARD
2324 	    : eap->cmdidx == CMD_cnfile
2325 		? FORWARD_FILE
2326 		: (eap->cmdidx == CMD_cpfile || eap->cmdidx == CMD_cNfile)
2327 		    ? BACKWARD_FILE
2328 		    : BACKWARD,
2329 	    eap->addr_count > 0 ? (int)eap->line2 : 1, eap->forceit);
2330 }
2331 
2332 /*
2333  * ":cfile" command.
2334  */
2335     void
2336 ex_cfile(eap)
2337     exarg_T	*eap;
2338 {
2339     if (*eap->arg != NUL)
2340 	set_string_option_direct((char_u *)"ef", -1, eap->arg, OPT_FREE);
2341     if (qf_init(p_ef, p_efm, TRUE) > 0 && eap->cmdidx == CMD_cfile)
2342 	qf_jump(0, 0, eap->forceit);		/* display first error */
2343 }
2344 
2345 /*
2346  * ":vimgrep {pattern} file(s)"
2347  */
2348     void
2349 ex_vimgrep(eap)
2350     exarg_T	*eap;
2351 {
2352     regmmatch_T	regmatch;
2353     int		fcount;
2354     char_u	**fnames;
2355     char_u	*s;
2356     char_u	*p;
2357     int		fi;
2358     qfline_T	*prevp = NULL;
2359     long	lnum;
2360     buf_T	*buf;
2361     int		duplicate_name = FALSE;
2362     int		using_dummy;
2363     int		found_match;
2364     buf_T	*first_match_buf = NULL;
2365     time_t	seconds = 0;
2366 #if defined(FEAT_AUTOCMD) && defined(FEAT_SYN_HL)
2367     char_u	*save_ei = NULL;
2368     aco_save_T	aco;
2369 #endif
2370 #ifdef FEAT_AUTOCMD
2371     char_u	*au_name =  NULL;
2372     int		flags = 0;
2373     colnr_T	col;
2374 
2375     switch (eap->cmdidx)
2376     {
2377 	case CMD_vimgrep: au_name = (char_u *)"vimgrep"; break;
2378 	case CMD_vimgrepadd: au_name = (char_u *)"vimgrepadd"; break;
2379 	default: break;
2380     }
2381     if (au_name != NULL)
2382     {
2383 	apply_autocmds(EVENT_QUICKFIXCMDPRE, au_name,
2384 					       curbuf->b_fname, TRUE, curbuf);
2385 	if (did_throw || force_abort)
2386 	    return;
2387     }
2388 #endif
2389 
2390     /* Get the search pattern: either white-separated or enclosed in // */
2391     regmatch.regprog = NULL;
2392     p = skip_vimgrep_pat(eap->arg, &s, &flags);
2393     if (p == NULL)
2394     {
2395 	EMSG(_(e_invalpat));
2396 	goto theend;
2397     }
2398     regmatch.regprog = vim_regcomp(s, RE_MAGIC);
2399     if (regmatch.regprog == NULL)
2400 	goto theend;
2401     regmatch.rmm_ic = p_ic;
2402 
2403     p = skipwhite(p);
2404     if (*p == NUL)
2405     {
2406 	EMSG(_("E683: File name missing or invalid pattern"));
2407 	goto theend;
2408     }
2409 
2410     if ((eap->cmdidx != CMD_grepadd && eap->cmdidx != CMD_vimgrepadd)
2411 						|| qf_curlist == qf_listcount)
2412 	/* make place for a new list */
2413 	qf_new_list();
2414     else if (qf_lists[qf_curlist].qf_count > 0)
2415 	/* Adding to existing list, find last entry. */
2416 	for (prevp = qf_lists[qf_curlist].qf_start;
2417 			    prevp->qf_next != prevp; prevp = prevp->qf_next)
2418 	    ;
2419 
2420     /* parse the list of arguments */
2421     if (get_arglist_exp(p, &fcount, &fnames) == FAIL)
2422 	goto theend;
2423     if (fcount == 0)
2424     {
2425 	EMSG(_(e_nomatch));
2426 	goto theend;
2427     }
2428 
2429     seconds = (time_t)0;
2430     for (fi = 0; fi < fcount && !got_int; ++fi)
2431     {
2432 	if (time(NULL) > seconds)
2433 	{
2434 	    /* Display the file name every second or so. */
2435 	    seconds = time(NULL);
2436 	    msg_start();
2437 	    p = msg_strtrunc(fnames[fi]);
2438 	    if (p == NULL)
2439 		msg_outtrans(fnames[fi]);
2440 	    else
2441 	    {
2442 		msg_outtrans(p);
2443 		vim_free(p);
2444 	    }
2445 	    msg_clr_eos();
2446 	    msg_didout = FALSE;	    /* overwrite this message */
2447 	    msg_nowait = TRUE;	    /* don't wait for this message */
2448 	    msg_col = 0;
2449 	    out_flush();
2450 	}
2451 
2452 	buf = buflist_findname_exp(fnames[fi]);
2453 	if (buf == NULL || buf->b_ml.ml_mfp == NULL)
2454 	{
2455 	    /* Remember that a buffer with this name already exists. */
2456 	    duplicate_name = (buf != NULL);
2457 	    using_dummy = TRUE;
2458 
2459 #if defined(FEAT_AUTOCMD) && defined(FEAT_SYN_HL)
2460 	    /* Don't do Filetype autocommands to avoid loading syntax and
2461 	     * indent scripts, a great speed improvement. */
2462 	    save_ei = au_event_disable(",Filetype");
2463 #endif
2464 
2465 	    /* Load file into a buffer, so that 'fileencoding' is detected,
2466 	     * autocommands applied, etc. */
2467 	    buf = load_dummy_buffer(fnames[fi]);
2468 
2469 #if defined(FEAT_AUTOCMD) && defined(FEAT_SYN_HL)
2470 	    au_event_restore(save_ei);
2471 #endif
2472 	}
2473 	else
2474 	    /* Use existing, loaded buffer. */
2475 	    using_dummy = FALSE;
2476 
2477 	if (buf == NULL)
2478 	{
2479 	    if (!got_int)
2480 		smsg((char_u *)_("Cannot open file \"%s\""), fnames[fi]);
2481 	}
2482 	else
2483 	{
2484 	    found_match = FALSE;
2485 	    /* Try for a match in all lines of the buffer. */
2486 	    for (lnum = 1; lnum <= buf->b_ml.ml_line_count; ++lnum)
2487 	    {
2488 		/* For ":1vimgrep" look for multiple matches. */
2489 		col = 0;
2490 		while (vim_regexec_multi(&regmatch, curwin, buf, lnum,
2491 								     col) > 0)
2492 		{
2493 		    if (qf_add_entry(&prevp,
2494 				NULL,       /* dir */
2495 				fnames[fi],
2496 				ml_get_buf(buf,
2497 				     regmatch.startpos[0].lnum + lnum, FALSE),
2498 				regmatch.startpos[0].lnum + lnum,
2499 				regmatch.startpos[0].col + 1,
2500 				FALSE,      /* vis_col */
2501 				NULL,	    /* search pattern */
2502 				0,          /* nr */
2503 				0,          /* type */
2504 				TRUE        /* valid */
2505 				) == FAIL)
2506 		    {
2507 			got_int = TRUE;
2508 			break;
2509 		    }
2510 		    else
2511 			found_match = TRUE;
2512 		    if ((flags & VGR_GLOBAL) == 0
2513 					       || regmatch.endpos[0].lnum > 0)
2514 			break;
2515 		    col = regmatch.endpos[0].col
2516 					    + (col == regmatch.endpos[0].col);
2517 		    if (col > STRLEN(ml_get_buf(buf, lnum, FALSE)))
2518 			break;
2519 		}
2520 		line_breakcheck();
2521 		if (got_int)
2522 		    break;
2523 	    }
2524 
2525 	    if (using_dummy)
2526 	    {
2527 		if (found_match && first_match_buf == NULL)
2528 		    first_match_buf = buf;
2529 		if (duplicate_name)
2530 		{
2531 		    /* Never keep a dummy buffer if there is another buffer
2532 		     * with the same name. */
2533 		    wipe_dummy_buffer(buf);
2534 		    buf = NULL;
2535 		}
2536 		else if (!buf_hide(buf))
2537 		{
2538 		    /* When not hiding the buffer and no match was found we
2539 		     * don't need to remember the buffer, wipe it out.  If
2540 		     * there was a match and it wasn't the first one or we
2541 		     * won't jump there: only unload the buffer. */
2542 		    if (!found_match)
2543 		    {
2544 			wipe_dummy_buffer(buf);
2545 			buf = NULL;
2546 		    }
2547 		    else if (buf != first_match_buf || (flags & VGR_NOJUMP))
2548 		    {
2549 			unload_dummy_buffer(buf);
2550 			buf = NULL;
2551 		    }
2552 		}
2553 
2554 #if defined(FEAT_AUTOCMD) && defined(FEAT_SYN_HL)
2555 		if (buf != NULL)
2556 		{
2557 		    /* The buffer is still loaded, the Filetype autocommands
2558 		     * need to be done now, in that buffer.  And then the
2559 		     * modelines need to be done (again). */
2560 		    aucmd_prepbuf(&aco, buf);
2561 		    apply_autocmds(EVENT_FILETYPE, buf->b_p_ft,
2562 						     buf->b_fname, TRUE, buf);
2563 		    do_modelines(FALSE);
2564 		    aucmd_restbuf(&aco);
2565 		}
2566 #endif
2567 	    }
2568 	}
2569     }
2570 
2571     FreeWild(fcount, fnames);
2572 
2573     qf_lists[qf_curlist].qf_nonevalid = FALSE;
2574     qf_lists[qf_curlist].qf_ptr = qf_lists[qf_curlist].qf_start;
2575     qf_lists[qf_curlist].qf_index = 1;
2576 
2577 #ifdef FEAT_WINDOWS
2578     qf_update_buffer();
2579 #endif
2580 
2581     /* Jump to first match. */
2582     if (qf_lists[qf_curlist].qf_count > 0)
2583     {
2584 	if ((flags & VGR_NOJUMP) == 0)
2585 	    qf_jump(0, 0, eap->forceit);
2586     }
2587     else
2588 	EMSG2(_(e_nomatch2), s);
2589 
2590 #ifdef FEAT_AUTOCMD
2591     if (au_name != NULL)
2592 	apply_autocmds(EVENT_QUICKFIXCMDPOST, au_name,
2593 					       curbuf->b_fname, TRUE, curbuf);
2594 #endif
2595 
2596 theend:
2597     vim_free(regmatch.regprog);
2598 }
2599 
2600 /*
2601  * Skip over the pattern argument of ":vimgrep /pat/[g][j]".
2602  * Put the start of the pattern in "*s", unless "s" is NULL.
2603  * If "flags" is not NULL put the flags in it: VGR_GLOBAL, VGR_NOJUMP.
2604  * If "s" is not NULL terminate the pattern with a NUL.
2605  * Return a pointer to the char just past the pattern plus flags.
2606  */
2607     char_u *
2608 skip_vimgrep_pat(p, s, flags)
2609     char_u  *p;
2610     char_u  **s;
2611     int	    *flags;
2612 {
2613     int		c;
2614 
2615     if (vim_isIDc(*p))
2616     {
2617 	/* ":vimgrep pattern fname" */
2618 	if (s != NULL)
2619 	    *s = p;
2620 	p = skiptowhite(p);
2621 	if (s != NULL && *p != NUL)
2622 	    *p++ = NUL;
2623     }
2624     else
2625     {
2626 	/* ":vimgrep /pattern/[g][j] fname" */
2627 	if (s != NULL)
2628 	    *s = p + 1;
2629 	c = *p;
2630 	p = skip_regexp(p + 1, c, TRUE, NULL);
2631 	if (*p != c)
2632 	    return NULL;
2633 
2634 	/* Truncate the pattern. */
2635 	if (s != NULL)
2636 	    *p = NUL;
2637 	++p;
2638 
2639 	/* Find the flags */
2640 	while (*p == 'g' || *p == 'j')
2641 	{
2642 	    if (flags != NULL)
2643 	    {
2644 		if (*p == 'g')
2645 		    *flags |= VGR_GLOBAL;
2646 		else
2647 		    *flags |= VGR_NOJUMP;
2648 	    }
2649 	    ++p;
2650 	}
2651     }
2652     return p;
2653 }
2654 
2655 /*
2656  * Load file "fname" into a dummy buffer and return the buffer pointer.
2657  * Returns NULL if it fails.
2658  * Must call unload_dummy_buffer() or wipe_dummy_buffer() later!
2659  */
2660     static buf_T *
2661 load_dummy_buffer(fname)
2662     char_u	*fname;
2663 {
2664     buf_T	*newbuf;
2665     int		failed = TRUE;
2666 #ifdef FEAT_AUTOCMD
2667     aco_save_T	aco;
2668 #else
2669     buf_T	*old_curbuf = curbuf;
2670 #endif
2671 
2672     /* Allocate a buffer without putting it in the buffer list. */
2673     newbuf = buflist_new(NULL, NULL, (linenr_T)1, BLN_DUMMY);
2674     if (newbuf == NULL)
2675 	return NULL;
2676 
2677     /* Init the options. */
2678     buf_copy_options(newbuf, BCO_ENTER | BCO_NOHELP);
2679 
2680 #ifdef FEAT_AUTOCMD
2681     /* set curwin/curbuf to buf and save a few things */
2682     aucmd_prepbuf(&aco, newbuf);
2683 #else
2684     curbuf = newbuf;
2685     curwin->w_buffer = newbuf;
2686 #endif
2687 
2688     /* Need to set the filename for autocommands. */
2689     (void)setfname(curbuf, fname, NULL, FALSE);
2690 
2691     if (ml_open() == OK)
2692     {
2693 	/* Create swap file now to avoid the ATTENTION message. */
2694 	check_need_swap(TRUE);
2695 
2696 	/* Remove the "dummy" flag, otherwise autocommands may not
2697 	 * work. */
2698 	curbuf->b_flags &= ~BF_DUMMY;
2699 
2700 	if (readfile(fname, NULL,
2701 		    (linenr_T)0, (linenr_T)0, (linenr_T)MAXLNUM,
2702 		    NULL, READ_NEW | READ_DUMMY) == OK
2703 		&& !(curbuf->b_flags & BF_NEW))
2704 	{
2705 	    failed = FALSE;
2706 	    if (curbuf != newbuf)
2707 	    {
2708 		/* Bloody autocommands changed the buffer! */
2709 		if (buf_valid(newbuf))
2710 		    wipe_buffer(newbuf, FALSE);
2711 		newbuf = curbuf;
2712 	    }
2713 	}
2714     }
2715 
2716 #ifdef FEAT_AUTOCMD
2717     /* restore curwin/curbuf and a few other things */
2718     aucmd_restbuf(&aco);
2719 #else
2720     curbuf = old_curbuf;
2721     curwin->w_buffer = old_curbuf;
2722 #endif
2723 
2724     if (!buf_valid(newbuf))
2725 	return NULL;
2726     if (failed)
2727     {
2728 	wipe_dummy_buffer(newbuf);
2729 	return NULL;
2730     }
2731     return newbuf;
2732 }
2733 
2734 /*
2735  * Wipe out the dummy buffer that load_dummy_buffer() created.
2736  */
2737     static void
2738 wipe_dummy_buffer(buf)
2739     buf_T	*buf;
2740 {
2741     if (curbuf != buf)		/* safety check */
2742 	wipe_buffer(buf, FALSE);
2743 }
2744 
2745 /*
2746  * Unload the dummy buffer that load_dummy_buffer() created.
2747  */
2748     static void
2749 unload_dummy_buffer(buf)
2750     buf_T	*buf;
2751 {
2752     if (curbuf != buf)		/* safety check */
2753 	close_buffer(NULL, buf, DOBUF_UNLOAD);
2754 }
2755 
2756 #if defined(FEAT_EVAL) || defined(PROTO)
2757 /*
2758  * Add each quickfix error to list "list" as a dictionary.
2759  */
2760     int
2761 get_errorlist(list)
2762     list_T	*list;
2763 {
2764     dict_T	*dict;
2765     char_u	buf[2];
2766     qfline_T	*qfp;
2767     int		i;
2768 
2769     if (qf_curlist >= qf_listcount || qf_lists[qf_curlist].qf_count == 0)
2770     {
2771 	EMSG(_(e_quickfix));
2772 	return FAIL;
2773     }
2774 
2775     qfp = qf_lists[qf_curlist].qf_start;
2776     for (i = 1; !got_int && i <= qf_lists[qf_curlist].qf_count; ++i)
2777     {
2778 	if ((dict = dict_alloc()) == NULL)
2779 	    return FAIL;
2780 	if (list_append_dict(list, dict) == FAIL)
2781 	    return FAIL;
2782 
2783 	buf[0] = qfp->qf_type;
2784 	buf[1] = NUL;
2785 	if ( dict_add_nr_str(dict, "bufnr", (long)qfp->qf_fnum, NULL) == FAIL
2786 	  || dict_add_nr_str(dict, "lnum",  (long)qfp->qf_lnum, NULL) == FAIL
2787 	  || dict_add_nr_str(dict, "col",   (long)qfp->qf_col, NULL) == FAIL
2788 	  || dict_add_nr_str(dict, "vcol",  (long)qfp->qf_viscol, NULL) == FAIL
2789 	  || dict_add_nr_str(dict, "nr",    (long)qfp->qf_nr, NULL) == FAIL
2790 	  || dict_add_nr_str(dict, "pattern",  0L, qfp->qf_pattern) == FAIL
2791 	  || dict_add_nr_str(dict, "text",  0L, qfp->qf_text) == FAIL
2792 	  || dict_add_nr_str(dict, "type",  0L, buf) == FAIL
2793 	  || dict_add_nr_str(dict, "valid", (long)qfp->qf_valid, NULL) == FAIL)
2794 	    return FAIL;
2795 
2796 	qfp = qfp->qf_next;
2797     }
2798     return OK;
2799 }
2800 
2801 /*
2802  * Populate the quickfix list with the items supplied in the list
2803  * of dictionaries.
2804  */
2805     int
2806 set_errorlist(list, action)
2807     list_T	*list;
2808     int		action;
2809 {
2810     listitem_T	*li;
2811     dict_T	*d;
2812     char_u	*filename, *pattern, *text, *type;
2813     long	lnum;
2814     int		col, nr;
2815     int		vcol;
2816     qfline_T	*prevp = NULL;
2817     int		valid, status;
2818     int		retval = OK;
2819 
2820     if (action == ' ' || qf_curlist == qf_listcount)
2821 	/* make place for a new list */
2822 	qf_new_list();
2823     else if (action == 'a' && qf_lists[qf_curlist].qf_count > 0)
2824 	/* Adding to existing list, find last entry. */
2825 	for (prevp = qf_lists[qf_curlist].qf_start;
2826 	     prevp->qf_next != prevp; prevp = prevp->qf_next)
2827 	    ;
2828     else if (action == 'r')
2829 	qf_free(qf_curlist);
2830 
2831     for (li = list->lv_first; li != NULL; li = li->li_next)
2832     {
2833 	if (li->li_tv.v_type != VAR_DICT)
2834 	    continue; /* Skip non-dict items */
2835 
2836 	d = li->li_tv.vval.v_dict;
2837 	if (d == NULL)
2838 	    continue;
2839 
2840 	filename = get_dict_string(d, (char_u *)"filename");
2841 	lnum = get_dict_number(d, (char_u *)"lnum");
2842 	col = get_dict_number(d, (char_u *)"col");
2843 	vcol = get_dict_number(d, (char_u *)"vcol");
2844 	nr = get_dict_number(d, (char_u *)"nr");
2845 	type = get_dict_string(d, (char_u *)"type");
2846 	pattern = get_dict_string(d, (char_u *)"pattern");
2847 	text = get_dict_string(d, (char_u *)"text");
2848 	if (text == NULL)
2849 	    text = vim_strsave((char_u *)"");
2850 
2851 	valid = TRUE;
2852 	if (filename == NULL || (lnum == 0 && pattern == NULL))
2853 	    valid = FALSE;
2854 
2855 	status =  qf_add_entry(&prevp,
2856 			       NULL,	    /* dir */
2857 			       filename,
2858 			       text,
2859 			       lnum,
2860 			       col,
2861 			       vcol,	    /* vis_col */
2862 			       pattern,	    /* search pattern */
2863 			       nr,
2864 			       type == NULL ? NUL : *type,
2865 			       valid);
2866 
2867 	vim_free(filename);
2868 	vim_free(pattern);
2869 	vim_free(text);
2870 	vim_free(type);
2871 
2872 	if (status == FAIL)
2873 	{
2874 	    retval = FAIL;
2875 	    break;
2876 	}
2877     }
2878 
2879     qf_lists[qf_curlist].qf_nonevalid = FALSE;
2880     qf_lists[qf_curlist].qf_ptr = qf_lists[qf_curlist].qf_start;
2881     qf_lists[qf_curlist].qf_index = 1;
2882 
2883 #ifdef FEAT_WINDOWS
2884     qf_update_buffer();
2885 #endif
2886 
2887     return retval;
2888 }
2889 #endif
2890 
2891 /*
2892  * ":[range]cbuffer [bufnr]" command.
2893  */
2894     void
2895 ex_cbuffer(eap)
2896     exarg_T   *eap;
2897 {
2898     buf_T	*buf = NULL;
2899 
2900     if (*eap->arg == NUL)
2901 	buf = curbuf;
2902     else if (*skipwhite(skipdigits(eap->arg)) == NUL)
2903 	buf = buflist_findnr(atoi((char *)eap->arg));
2904     if (buf == NULL)
2905 	EMSG(_(e_invarg));
2906     else if (buf->b_ml.ml_mfp == NULL)
2907 	EMSG(_("E681: Buffer is not loaded"));
2908     else
2909     {
2910 	if (eap->addr_count == 0)
2911 	{
2912 	    eap->line1 = 1;
2913 	    eap->line2 = buf->b_ml.ml_line_count;
2914 	}
2915 	if (eap->line1 < 1 || eap->line1 > buf->b_ml.ml_line_count
2916 		|| eap->line2 < 1 || eap->line2 > buf->b_ml.ml_line_count)
2917 	    EMSG(_(e_invrange));
2918 	else
2919 	    qf_init_ext(NULL, buf, p_efm, TRUE, eap->line1, eap->line2);
2920     }
2921 }
2922 
2923 /*
2924  * ":helpgrep {pattern}"
2925  */
2926     void
2927 ex_helpgrep(eap)
2928     exarg_T	*eap;
2929 {
2930     regmatch_T	regmatch;
2931     char_u	*save_cpo;
2932     char_u	*p;
2933     int		fcount;
2934     char_u	**fnames;
2935     FILE	*fd;
2936     int		fi;
2937     qfline_T	*prevp = NULL;
2938     long	lnum;
2939 #ifdef FEAT_MULTI_LANG
2940     char_u	*lang;
2941 #endif
2942 
2943     /* Make 'cpoptions' empty, the 'l' flag should not be used here. */
2944     save_cpo = p_cpo;
2945     p_cpo = (char_u *)"";
2946 
2947 #ifdef FEAT_MULTI_LANG
2948     /* Check for a specified language */
2949     lang = check_help_lang(eap->arg);
2950 #endif
2951 
2952     regmatch.regprog = vim_regcomp(eap->arg, RE_MAGIC + RE_STRING);
2953     regmatch.rm_ic = FALSE;
2954     if (regmatch.regprog != NULL)
2955     {
2956 	/* create a new quickfix list */
2957 	qf_new_list();
2958 
2959 	/* Go through all directories in 'runtimepath' */
2960 	p = p_rtp;
2961 	while (*p != NUL && !got_int)
2962 	{
2963 	    copy_option_part(&p, NameBuff, MAXPATHL, ",");
2964 
2965 	    /* Find all "*.txt" and "*.??x" files in the "doc" directory. */
2966 	    add_pathsep(NameBuff);
2967 	    STRCAT(NameBuff, "doc/*.\\(txt\\|??x\\)");
2968 	    if (gen_expand_wildcards(1, &NameBuff, &fcount,
2969 					     &fnames, EW_FILE|EW_SILENT) == OK
2970 		    && fcount > 0)
2971 	    {
2972 		for (fi = 0; fi < fcount && !got_int; ++fi)
2973 		{
2974 #ifdef FEAT_MULTI_LANG
2975 		    /* Skip files for a different language. */
2976 		    if (lang != NULL
2977 			    && STRNICMP(lang, fnames[fi]
2978 					    + STRLEN(fnames[fi]) - 3, 2) != 0
2979 			    && !(STRNICMP(lang, "en", 2) == 0
2980 				&& STRNICMP("txt", fnames[fi]
2981 					   + STRLEN(fnames[fi]) - 3, 3) == 0))
2982 			    continue;
2983 #endif
2984 		    fd = fopen((char *)fnames[fi], "r");
2985 		    if (fd != NULL)
2986 		    {
2987 			lnum = 1;
2988 			while (!vim_fgets(IObuff, IOSIZE, fd) && !got_int)
2989 			{
2990 			    if (vim_regexec(&regmatch, IObuff, (colnr_T)0))
2991 			    {
2992 				int	l = STRLEN(IObuff);
2993 
2994 				/* remove trailing CR, LF, spaces, etc. */
2995 				while (l > 0 && IObuff[l - 1] <= ' ')
2996 				     IObuff[--l] = NUL;
2997 
2998 				if (qf_add_entry(&prevp,
2999 					    NULL,	/* dir */
3000 					    fnames[fi],
3001 					    IObuff,
3002 					    lnum,
3003 					    (int)(regmatch.startp[0] - IObuff)
3004 								+ 1, /* col */
3005 					    FALSE,	/* vis_col */
3006 					    NULL,	/* search pattern */
3007 					    0,		/* nr */
3008 					    1,		/* type */
3009 					    TRUE	/* valid */
3010 					    ) == FAIL)
3011 				{
3012 				    got_int = TRUE;
3013 				    break;
3014 				}
3015 			    }
3016 			    ++lnum;
3017 			    line_breakcheck();
3018 			}
3019 			fclose(fd);
3020 		    }
3021 		}
3022 		FreeWild(fcount, fnames);
3023 	    }
3024 	}
3025 	vim_free(regmatch.regprog);
3026 
3027 	qf_lists[qf_curlist].qf_nonevalid = FALSE;
3028 	qf_lists[qf_curlist].qf_ptr = qf_lists[qf_curlist].qf_start;
3029 	qf_lists[qf_curlist].qf_index = 1;
3030     }
3031 
3032     p_cpo = save_cpo;
3033 
3034 #ifdef FEAT_WINDOWS
3035     qf_update_buffer();
3036 #endif
3037 
3038     /* Jump to first match. */
3039     if (qf_lists[qf_curlist].qf_count > 0)
3040 	qf_jump(0, 0, FALSE);
3041     else
3042 	EMSG2(_(e_nomatch2), eap->arg);
3043 }
3044 
3045 #endif /* FEAT_QUICKFIX */
3046