xref: /vim-8.2.3635/src/quickfix.c (revision e16b00a1)
1 /* vi:set ts=8 sts=4 sw=4 noet:
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 /*
25  * For each error the next struct is allocated and linked in a list.
26  */
27 typedef struct qfline_S qfline_T;
28 struct qfline_S
29 {
30     qfline_T	*qf_next;	/* pointer to next error in the list */
31     qfline_T	*qf_prev;	/* pointer to previous error in the list */
32     linenr_T	qf_lnum;	/* line number where the error occurred */
33     int		qf_fnum;	/* file number for the line */
34     int		qf_col;		/* column where the error occurred */
35     int		qf_nr;		/* error number */
36     char_u	*qf_pattern;	/* search pattern for the error */
37     char_u	*qf_text;	/* description of the error */
38     char_u	qf_viscol;	/* set to TRUE if qf_col is screen column */
39     char_u	qf_cleared;	/* set to TRUE if line has been deleted */
40     char_u	qf_type;	/* type of the error (mostly 'E'); 1 for
41 				   :helpgrep */
42     char_u	qf_valid;	/* valid error message detected */
43 };
44 
45 /*
46  * There is a stack of error lists.
47  */
48 #define LISTCOUNT   10
49 
50 /*
51  * Quickfix/Location list definition
52  * Contains a list of entries (qfline_T). qf_start points to the first entry
53  * and qf_last points to the last entry. qf_count contains the list size.
54  *
55  * Usually the list contains one or more entries. But an empty list can be
56  * created using setqflist()/setloclist() with a title and/or user context
57  * information and entries can be added later using setqflist()/setloclist().
58  */
59 typedef struct qf_list_S
60 {
61     qfline_T	*qf_start;	/* pointer to the first error */
62     qfline_T	*qf_last;	/* pointer to the last error */
63     qfline_T	*qf_ptr;	/* pointer to the current error */
64     int		qf_count;	/* number of errors (0 means empty list) */
65     int		qf_index;	/* current index in the error list */
66     int		qf_nonevalid;	/* TRUE if not a single valid entry found */
67     char_u	*qf_title;	/* title derived from the command that created
68 				 * the error list or set by setqflist */
69     typval_T	*qf_ctx;	/* context set by setqflist/setloclist */
70 
71     struct dir_stack_T	*qf_dir_stack;
72     char_u		*qf_directory;
73     struct dir_stack_T	*qf_file_stack;
74     char_u		*qf_currfile;
75     int			qf_multiline;
76     int			qf_multiignore;
77     int			qf_multiscan;
78 } qf_list_T;
79 
80 /*
81  * Quickfix/Location list stack definition
82  * Contains a list of quickfix/location lists (qf_list_T)
83  */
84 struct qf_info_S
85 {
86     /*
87      * Count of references to this list. Used only for location lists.
88      * When a location list window reference this list, qf_refcount
89      * will be 2. Otherwise, qf_refcount will be 1. When qf_refcount
90      * reaches 0, the list is freed.
91      */
92     int		qf_refcount;
93     int		qf_listcount;	    /* current number of lists */
94     int		qf_curlist;	    /* current error list */
95     qf_list_T	qf_lists[LISTCOUNT];
96 };
97 
98 static qf_info_T ql_info;	/* global quickfix list */
99 
100 #define FMT_PATTERNS 10		/* maximum number of % recognized */
101 
102 /*
103  * Structure used to hold the info of one part of 'errorformat'
104  */
105 typedef struct efm_S efm_T;
106 struct efm_S
107 {
108     regprog_T	    *prog;	/* pre-formatted part of 'errorformat' */
109     efm_T	    *next;	/* pointer to next (NULL if last) */
110     char_u	    addr[FMT_PATTERNS]; /* indices of used % patterns */
111     char_u	    prefix;	/* prefix of this format line: */
112 				/*   'D' enter directory */
113 				/*   'X' leave directory */
114 				/*   'A' start of multi-line message */
115 				/*   'E' error message */
116 				/*   'W' warning message */
117 				/*   'I' informational message */
118 				/*   'C' continuation line */
119 				/*   'Z' end of multi-line message */
120 				/*   'G' general, unspecific message */
121 				/*   'P' push file (partial) message */
122 				/*   'Q' pop/quit file (partial) message */
123 				/*   'O' overread (partial) message */
124     char_u	    flags;	/* additional flags given in prefix */
125 				/*   '-' do not include this line */
126 				/*   '+' include whole line in message */
127     int		    conthere;	/* %> used */
128 };
129 
130 static efm_T	*fmt_start = NULL; /* cached across qf_parse_line() calls */
131 
132 static int	qf_init_ext(qf_info_T *qi, int qf_idx, char_u *efile, buf_T *buf, typval_T *tv, char_u *errorformat, int newlist, linenr_T lnumfirst, linenr_T lnumlast, char_u *qf_title, char_u *enc);
133 static void	qf_store_title(qf_info_T *qi, int qf_idx, char_u *title);
134 static void	qf_new_list(qf_info_T *qi, char_u *qf_title);
135 static void	ll_free_all(qf_info_T **pqi);
136 static int	qf_add_entry(qf_info_T *qi, int qf_idx, char_u *dir, char_u *fname, int bufnum, char_u *mesg, long lnum, int col, int vis_col, char_u *pattern, int nr, int type, int valid);
137 static qf_info_T *ll_new_list(void);
138 static void	qf_free(qf_info_T *qi, int idx);
139 static char_u	*qf_types(int, int);
140 static int	qf_get_fnum(qf_info_T *qi, int qf_idx, char_u *, char_u *);
141 static char_u	*qf_push_dir(char_u *, struct dir_stack_T **, int is_file_stack);
142 static char_u	*qf_pop_dir(struct dir_stack_T **);
143 static char_u	*qf_guess_filepath(qf_info_T *qi, int qf_idx, char_u *);
144 static void	qf_fmt_text(char_u *text, char_u *buf, int bufsize);
145 static void	qf_clean_dir_stack(struct dir_stack_T **);
146 #ifdef FEAT_WINDOWS
147 static int	qf_win_pos_update(qf_info_T *qi, int old_qf_index);
148 static int	is_qf_win(win_T *win, qf_info_T *qi);
149 static win_T	*qf_find_win(qf_info_T *qi);
150 static buf_T	*qf_find_buf(qf_info_T *qi);
151 static void	qf_update_buffer(qf_info_T *qi, qfline_T *old_last);
152 static void	qf_set_title_var(qf_info_T *qi);
153 static void	qf_fill_buffer(qf_info_T *qi, buf_T *buf, qfline_T *old_last);
154 #endif
155 static char_u	*get_mef_name(void);
156 static void	restore_start_dir(char_u *dirname_start);
157 static buf_T	*load_dummy_buffer(char_u *fname, char_u *dirname_start, char_u *resulting_dir);
158 static void	wipe_dummy_buffer(buf_T *buf, char_u *dirname_start);
159 static void	unload_dummy_buffer(buf_T *buf, char_u *dirname_start);
160 static qf_info_T *ll_get_or_alloc_list(win_T *);
161 
162 /* Quickfix window check helper macro */
163 #define IS_QF_WINDOW(wp) (bt_quickfix(wp->w_buffer) && wp->w_llist_ref == NULL)
164 /* Location list window check helper macro */
165 #define IS_LL_WINDOW(wp) (bt_quickfix(wp->w_buffer) && wp->w_llist_ref != NULL)
166 /*
167  * Return location list for window 'wp'
168  * For location list window, return the referenced location list
169  */
170 #define GET_LOC_LIST(wp) (IS_LL_WINDOW(wp) ? wp->w_llist_ref : wp->w_llist)
171 
172 /*
173  * Looking up a buffer can be slow if there are many.  Remember the last one
174  * to make this a lot faster if there are multiple matches in the same file.
175  */
176 static char_u   *qf_last_bufname = NULL;
177 static bufref_T  qf_last_bufref = {NULL, 0, 0};
178 
179 /*
180  * Read the errorfile "efile" into memory, line by line, building the error
181  * list. Set the error list's title to qf_title.
182  * Return -1 for error, number of errors for success.
183  */
184     int
185 qf_init(
186     win_T	    *wp,
187     char_u	    *efile,
188     char_u	    *errorformat,
189     int		    newlist,		/* TRUE: start a new error list */
190     char_u	    *qf_title,
191     char_u	    *enc)
192 {
193     qf_info_T	    *qi = &ql_info;
194 
195     if (wp != NULL)
196     {
197 	qi = ll_get_or_alloc_list(wp);
198 	if (qi == NULL)
199 	    return FAIL;
200     }
201 
202     return qf_init_ext(qi, qi->qf_curlist, efile, curbuf, NULL, errorformat,
203 	    newlist, (linenr_T)0, (linenr_T)0, qf_title, enc);
204 }
205 
206 /*
207  * Maximum number of bytes allowed per line while reading a errorfile.
208  */
209 #define LINE_MAXLEN 4096
210 
211 static struct fmtpattern
212 {
213     char_u	convchar;
214     char	*pattern;
215 } fmt_pat[FMT_PATTERNS] =
216 		{
217 		    {'f', ".\\+"},	    /* only used when at end */
218 		    {'n', "\\d\\+"},
219 		    {'l', "\\d\\+"},
220 		    {'c', "\\d\\+"},
221 		    {'t', "."},
222 		    {'m', ".\\+"},
223 		    {'r', ".*"},
224 		    {'p', "[- 	.]*"},
225 		    {'v', "\\d\\+"},
226 		    {'s', ".\\+"}
227 		};
228 
229 /*
230  * Converts a 'errorformat' string to regular expression pattern
231  */
232     static int
233 efm_to_regpat(
234     char_u	*efm,
235     int		len,
236     efm_T	*fmt_ptr,
237     char_u	*regpat,
238     char_u	*errmsg)
239 {
240     char_u	*ptr;
241     char_u	*efmp;
242     char_u	*srcptr;
243     int		round;
244     int		idx = 0;
245 
246     /*
247      * Build regexp pattern from current 'errorformat' option
248      */
249     ptr = regpat;
250     *ptr++ = '^';
251     round = 0;
252     for (efmp = efm; efmp < efm + len; ++efmp)
253     {
254 	if (*efmp == '%')
255 	{
256 	    ++efmp;
257 	    for (idx = 0; idx < FMT_PATTERNS; ++idx)
258 		if (fmt_pat[idx].convchar == *efmp)
259 		    break;
260 	    if (idx < FMT_PATTERNS)
261 	    {
262 		if (fmt_ptr->addr[idx])
263 		{
264 		    sprintf((char *)errmsg,
265 			    _("E372: Too many %%%c in format string"), *efmp);
266 		    EMSG(errmsg);
267 		    return -1;
268 		}
269 		if ((idx
270 			    && idx < 6
271 			    && vim_strchr((char_u *)"DXOPQ",
272 				fmt_ptr->prefix) != NULL)
273 			|| (idx == 6
274 			    && vim_strchr((char_u *)"OPQ",
275 				fmt_ptr->prefix) == NULL))
276 		{
277 		    sprintf((char *)errmsg,
278 			    _("E373: Unexpected %%%c in format string"), *efmp);
279 		    EMSG(errmsg);
280 		    return -1;
281 		}
282 		fmt_ptr->addr[idx] = (char_u)++round;
283 		*ptr++ = '\\';
284 		*ptr++ = '(';
285 #ifdef BACKSLASH_IN_FILENAME
286 		if (*efmp == 'f')
287 		{
288 		    /* Also match "c:" in the file name, even when
289 		     * checking for a colon next: "%f:".
290 		     * "\%(\a:\)\=" */
291 		    STRCPY(ptr, "\\%(\\a:\\)\\=");
292 		    ptr += 10;
293 		}
294 #endif
295 		if (*efmp == 'f' && efmp[1] != NUL)
296 		{
297 		    if (efmp[1] != '\\' && efmp[1] != '%')
298 		    {
299 			/* A file name may contain spaces, but this isn't
300 			 * in "\f".  For "%f:%l:%m" there may be a ":" in
301 			 * the file name.  Use ".\{-1,}x" instead (x is
302 			 * the next character), the requirement that :999:
303 			 * follows should work. */
304 			STRCPY(ptr, ".\\{-1,}");
305 			ptr += 7;
306 		    }
307 		    else
308 		    {
309 			/* File name followed by '\\' or '%': include as
310 			 * many file name chars as possible. */
311 			STRCPY(ptr, "\\f\\+");
312 			ptr += 4;
313 		    }
314 		}
315 		else
316 		{
317 		    srcptr = (char_u *)fmt_pat[idx].pattern;
318 		    while ((*ptr = *srcptr++) != NUL)
319 			++ptr;
320 		}
321 		*ptr++ = '\\';
322 		*ptr++ = ')';
323 	    }
324 	    else if (*efmp == '*')
325 	    {
326 		if (*++efmp == '[' || *efmp == '\\')
327 		{
328 		    if ((*ptr++ = *efmp) == '[')	/* %*[^a-z0-9] etc. */
329 		    {
330 			if (efmp[1] == '^')
331 			    *ptr++ = *++efmp;
332 			if (efmp < efm + len)
333 			{
334 			    *ptr++ = *++efmp;	    /* could be ']' */
335 			    while (efmp < efm + len
336 				    && (*ptr++ = *++efmp) != ']')
337 				/* skip */;
338 			    if (efmp == efm + len)
339 			    {
340 				EMSG(_("E374: Missing ] in format string"));
341 				return -1;
342 			    }
343 			}
344 		    }
345 		    else if (efmp < efm + len)	/* %*\D, %*\s etc. */
346 			*ptr++ = *++efmp;
347 		    *ptr++ = '\\';
348 		    *ptr++ = '+';
349 		}
350 		else
351 		{
352 		    /* TODO: scanf()-like: %*ud, %*3c, %*f, ... ? */
353 		    sprintf((char *)errmsg,
354 			    _("E375: Unsupported %%%c in format string"), *efmp);
355 		    EMSG(errmsg);
356 		    return -1;
357 		}
358 	    }
359 	    else if (vim_strchr((char_u *)"%\\.^$~[", *efmp) != NULL)
360 		*ptr++ = *efmp;		/* regexp magic characters */
361 	    else if (*efmp == '#')
362 		*ptr++ = '*';
363 	    else if (*efmp == '>')
364 		fmt_ptr->conthere = TRUE;
365 	    else if (efmp == efm + 1)		/* analyse prefix */
366 	    {
367 		if (vim_strchr((char_u *)"+-", *efmp) != NULL)
368 		    fmt_ptr->flags = *efmp++;
369 		if (vim_strchr((char_u *)"DXAEWICZGOPQ", *efmp) != NULL)
370 		    fmt_ptr->prefix = *efmp;
371 		else
372 		{
373 		    sprintf((char *)errmsg,
374 			    _("E376: Invalid %%%c in format string prefix"), *efmp);
375 		    EMSG(errmsg);
376 		    return -1;
377 		}
378 	    }
379 	    else
380 	    {
381 		sprintf((char *)errmsg,
382 			_("E377: Invalid %%%c in format string"), *efmp);
383 		EMSG(errmsg);
384 		return -1;
385 	    }
386 	}
387 	else			/* copy normal character */
388 	{
389 	    if (*efmp == '\\' && efmp + 1 < efm + len)
390 		++efmp;
391 	    else if (vim_strchr((char_u *)".*^$~[", *efmp) != NULL)
392 		*ptr++ = '\\';	/* escape regexp atoms */
393 	    if (*efmp)
394 		*ptr++ = *efmp;
395 	}
396     }
397     *ptr++ = '$';
398     *ptr = NUL;
399 
400     return 0;
401 }
402 
403     static void
404 free_efm_list(efm_T **efm_first)
405 {
406     efm_T *efm_ptr;
407 
408     for (efm_ptr = *efm_first; efm_ptr != NULL; efm_ptr = *efm_first)
409     {
410 	*efm_first = efm_ptr->next;
411 	vim_regfree(efm_ptr->prog);
412 	vim_free(efm_ptr);
413     }
414     fmt_start = NULL;
415 }
416 
417 /* Parse 'errorformat' option */
418     static efm_T *
419 parse_efm_option(char_u *efm)
420 {
421     char_u	*errmsg = NULL;
422     int		errmsglen;
423     efm_T	*fmt_ptr = NULL;
424     efm_T	*fmt_first = NULL;
425     efm_T	*fmt_last = NULL;
426     char_u	*fmtstr = NULL;
427     int		len;
428     int		i;
429     int		round;
430 
431     errmsglen = CMDBUFFSIZE + 1;
432     errmsg = alloc_id(errmsglen, aid_qf_errmsg);
433     if (errmsg == NULL)
434 	goto parse_efm_end;
435 
436     /*
437      * Each part of the format string is copied and modified from errorformat
438      * to regex prog.  Only a few % characters are allowed.
439      */
440 
441     /*
442      * Get some space to modify the format string into.
443      */
444     i = (FMT_PATTERNS * 3) + ((int)STRLEN(efm) << 2);
445     for (round = FMT_PATTERNS; round > 0; )
446 	i += (int)STRLEN(fmt_pat[--round].pattern);
447 #ifdef COLON_IN_FILENAME
448     i += 12; /* "%f" can become twelve chars longer */
449 #else
450     i += 2; /* "%f" can become two chars longer */
451 #endif
452     if ((fmtstr = alloc(i)) == NULL)
453 	goto parse_efm_error;
454 
455     while (efm[0] != NUL)
456     {
457 	/*
458 	 * Allocate a new eformat structure and put it at the end of the list
459 	 */
460 	fmt_ptr = (efm_T *)alloc_clear((unsigned)sizeof(efm_T));
461 	if (fmt_ptr == NULL)
462 	    goto parse_efm_error;
463 	if (fmt_first == NULL)	    /* first one */
464 	    fmt_first = fmt_ptr;
465 	else
466 	    fmt_last->next = fmt_ptr;
467 	fmt_last = fmt_ptr;
468 
469 	/*
470 	 * Isolate one part in the 'errorformat' option
471 	 */
472 	for (len = 0; efm[len] != NUL && efm[len] != ','; ++len)
473 	    if (efm[len] == '\\' && efm[len + 1] != NUL)
474 		++len;
475 
476 	if (efm_to_regpat(efm, len, fmt_ptr, fmtstr, errmsg) == -1)
477 	    goto parse_efm_error;
478 	if ((fmt_ptr->prog = vim_regcomp(fmtstr, RE_MAGIC + RE_STRING)) == NULL)
479 	    goto parse_efm_error;
480 	/*
481 	 * Advance to next part
482 	 */
483 	efm = skip_to_option_part(efm + len);	/* skip comma and spaces */
484     }
485 
486     if (fmt_first == NULL)	/* nothing found */
487 	EMSG(_("E378: 'errorformat' contains no pattern"));
488 
489     goto parse_efm_end;
490 
491 parse_efm_error:
492     free_efm_list(&fmt_first);
493 
494 parse_efm_end:
495     vim_free(fmtstr);
496     vim_free(errmsg);
497 
498     return fmt_first;
499 }
500 
501 enum {
502     QF_FAIL = 0,
503     QF_OK = 1,
504     QF_END_OF_INPUT = 2,
505     QF_NOMEM = 3,
506     QF_IGNORE_LINE = 4
507 };
508 
509 typedef struct {
510     char_u	*linebuf;
511     int		linelen;
512     char_u	*growbuf;
513     int		growbufsiz;
514     FILE	*fd;
515     typval_T	*tv;
516     char_u	*p_str;
517     listitem_T	*p_li;
518     buf_T	*buf;
519     linenr_T	buflnum;
520     linenr_T	lnumlast;
521     vimconv_T	vc;
522 } qfstate_T;
523 
524     static char_u *
525 qf_grow_linebuf(qfstate_T *state, int newsz)
526 {
527     /*
528      * If the line exceeds LINE_MAXLEN exclude the last
529      * byte since it's not a NL character.
530      */
531     state->linelen = newsz > LINE_MAXLEN ? LINE_MAXLEN - 1 : newsz;
532     if (state->growbuf == NULL)
533     {
534 	state->growbuf = alloc(state->linelen + 1);
535 	if (state->growbuf == NULL)
536 	    return NULL;
537 	state->growbufsiz = state->linelen;
538     }
539     else if (state->linelen > state->growbufsiz)
540     {
541 	state->growbuf = vim_realloc(state->growbuf, state->linelen + 1);
542 	if (state->growbuf == NULL)
543 	    return NULL;
544 	state->growbufsiz = state->linelen;
545     }
546     return state->growbuf;
547 }
548 
549 /*
550  * Get the next string (separated by newline) from state->p_str.
551  */
552     static int
553 qf_get_next_str_line(qfstate_T *state)
554 {
555     /* Get the next line from the supplied string */
556     char_u	*p_str = state->p_str;
557     char_u	*p;
558     int		len;
559 
560     if (*p_str == NUL) /* Reached the end of the string */
561 	return QF_END_OF_INPUT;
562 
563     p = vim_strchr(p_str, '\n');
564     if (p != NULL)
565 	len = (int)(p - p_str) + 1;
566     else
567 	len = (int)STRLEN(p_str);
568 
569     if (len > IOSIZE - 2)
570     {
571 	state->linebuf = qf_grow_linebuf(state, len);
572 	if (state->linebuf == NULL)
573 	    return QF_NOMEM;
574     }
575     else
576     {
577 	state->linebuf = IObuff;
578 	state->linelen = len;
579     }
580     vim_strncpy(state->linebuf, p_str, state->linelen);
581 
582     /*
583      * Increment using len in order to discard the rest of the
584      * line if it exceeds LINE_MAXLEN.
585      */
586     p_str += len;
587     state->p_str = p_str;
588 
589     return QF_OK;
590 }
591 
592 /*
593  * Get the next string from state->p_Li.
594  */
595     static int
596 qf_get_next_list_line(qfstate_T *state)
597 {
598     listitem_T	*p_li = state->p_li;
599     int		len;
600 
601     while (p_li != NULL
602 	    && (p_li->li_tv.v_type != VAR_STRING
603 		|| p_li->li_tv.vval.v_string == NULL))
604 	p_li = p_li->li_next;	/* Skip non-string items */
605 
606     if (p_li == NULL)		/* End of the list */
607     {
608 	state->p_li = NULL;
609 	return QF_END_OF_INPUT;
610     }
611 
612     len = (int)STRLEN(p_li->li_tv.vval.v_string);
613     if (len > IOSIZE - 2)
614     {
615 	state->linebuf = qf_grow_linebuf(state, len);
616 	if (state->linebuf == NULL)
617 	    return QF_NOMEM;
618     }
619     else
620     {
621 	state->linebuf = IObuff;
622 	state->linelen = len;
623     }
624 
625     vim_strncpy(state->linebuf, p_li->li_tv.vval.v_string, state->linelen);
626 
627     state->p_li = p_li->li_next;	/* next item */
628     return QF_OK;
629 }
630 
631 /*
632  * Get the next string from state->buf.
633  */
634     static int
635 qf_get_next_buf_line(qfstate_T *state)
636 {
637     char_u	*p_buf = NULL;
638     int		len;
639 
640     /* Get the next line from the supplied buffer */
641     if (state->buflnum > state->lnumlast)
642 	return QF_END_OF_INPUT;
643 
644     p_buf = ml_get_buf(state->buf, state->buflnum, FALSE);
645     state->buflnum += 1;
646 
647     len = (int)STRLEN(p_buf);
648     if (len > IOSIZE - 2)
649     {
650 	state->linebuf = qf_grow_linebuf(state, len);
651 	if (state->linebuf == NULL)
652 	    return QF_NOMEM;
653     }
654     else
655     {
656 	state->linebuf = IObuff;
657 	state->linelen = len;
658     }
659     vim_strncpy(state->linebuf, p_buf, state->linelen);
660 
661     return QF_OK;
662 }
663 
664 /*
665  * Get the next string from file state->fd.
666  */
667     static int
668 qf_get_next_file_line(qfstate_T *state)
669 {
670     int	    discard;
671     int	    growbuflen;
672 
673     if (fgets((char *)IObuff, IOSIZE, state->fd) == NULL)
674 	return QF_END_OF_INPUT;
675 
676     discard = FALSE;
677     state->linelen = (int)STRLEN(IObuff);
678     if (state->linelen == IOSIZE - 1 && !(IObuff[state->linelen - 1] == '\n'))
679     {
680 	/*
681 	 * The current line exceeds IObuff, continue reading using
682 	 * growbuf until EOL or LINE_MAXLEN bytes is read.
683 	 */
684 	if (state->growbuf == NULL)
685 	{
686 	    state->growbufsiz = 2 * (IOSIZE - 1);
687 	    state->growbuf = alloc(state->growbufsiz);
688 	    if (state->growbuf == NULL)
689 		return QF_NOMEM;
690 	}
691 
692 	/* Copy the read part of the line, excluding null-terminator */
693 	memcpy(state->growbuf, IObuff, IOSIZE - 1);
694 	growbuflen = state->linelen;
695 
696 	for (;;)
697 	{
698 	    if (fgets((char *)state->growbuf + growbuflen,
699 			state->growbufsiz - growbuflen, state->fd) == NULL)
700 		break;
701 	    state->linelen = (int)STRLEN(state->growbuf + growbuflen);
702 	    growbuflen += state->linelen;
703 	    if ((state->growbuf)[growbuflen - 1] == '\n')
704 		break;
705 	    if (state->growbufsiz == LINE_MAXLEN)
706 	    {
707 		discard = TRUE;
708 		break;
709 	    }
710 
711 	    state->growbufsiz = 2 * state->growbufsiz < LINE_MAXLEN
712 		? 2 * state->growbufsiz : LINE_MAXLEN;
713 	    state->growbuf = vim_realloc(state->growbuf, state->growbufsiz);
714 	    if (state->growbuf == NULL)
715 		return QF_NOMEM;
716 	}
717 
718 	while (discard)
719 	{
720 	    /*
721 	     * The current line is longer than LINE_MAXLEN, continue
722 	     * reading but discard everything until EOL or EOF is
723 	     * reached.
724 	     */
725 	    if (fgets((char *)IObuff, IOSIZE, state->fd) == NULL
726 		    || (int)STRLEN(IObuff) < IOSIZE - 1
727 		    || IObuff[IOSIZE - 1] == '\n')
728 		break;
729 	}
730 
731 	state->linebuf = state->growbuf;
732 	state->linelen = growbuflen;
733     }
734     else
735 	state->linebuf = IObuff;
736 
737 #ifdef FEAT_MBYTE
738     /* Convert a line if it contains a non-ASCII character. */
739     if (state->vc.vc_type != CONV_NONE && has_non_ascii(state->linebuf))
740     {
741 	char_u	*line;
742 
743 	line = string_convert(&state->vc, state->linebuf, &state->linelen);
744 	if (line != NULL)
745 	{
746 	    if (state->linelen < IOSIZE)
747 	    {
748 		STRCPY(state->linebuf, line);
749 		vim_free(line);
750 	    }
751 	    else
752 	    {
753 		vim_free(state->growbuf);
754 		state->linebuf = state->growbuf = line;
755 		state->growbufsiz = state->linelen < LINE_MAXLEN
756 						? state->linelen : LINE_MAXLEN;
757 	    }
758 	}
759     }
760 #endif
761 
762     return QF_OK;
763 }
764 
765 /*
766  * Get the next string from a file/buffer/list/string.
767  */
768     static int
769 qf_get_nextline(qfstate_T *state)
770 {
771     int status = QF_FAIL;
772 
773     if (state->fd == NULL)
774     {
775 	if (state->tv != NULL)
776 	{
777 	    if (state->tv->v_type == VAR_STRING)
778 		/* Get the next line from the supplied string */
779 		status = qf_get_next_str_line(state);
780 	    else if (state->tv->v_type == VAR_LIST)
781 		/* Get the next line from the supplied list */
782 		status = qf_get_next_list_line(state);
783 	}
784 	else
785 	    /* Get the next line from the supplied buffer */
786 	    status = qf_get_next_buf_line(state);
787     }
788     else
789 	/* Get the next line from the supplied file */
790 	status = qf_get_next_file_line(state);
791 
792     if (status != QF_OK)
793 	return status;
794 
795     /* remove newline/CR from the line */
796     if (state->linelen > 0 && state->linebuf[state->linelen - 1] == '\n')
797     {
798 	state->linebuf[state->linelen - 1] = NUL;
799 #ifdef USE_CRNL
800 	if (state->linelen > 1 && state->linebuf[state->linelen - 2] == '\r')
801 	    state->linebuf[state->linelen - 2] = NUL;
802 #endif
803     }
804 
805 #ifdef FEAT_MBYTE
806     remove_bom(state->linebuf);
807 #endif
808 
809     return QF_OK;
810 }
811 
812 typedef struct {
813     char_u	*namebuf;
814     char_u	*errmsg;
815     int		errmsglen;
816     long	lnum;
817     int		col;
818     char_u	use_viscol;
819     char_u	*pattern;
820     int		enr;
821     int		type;
822     int		valid;
823 } qffields_T;
824 
825 /*
826  * Parse a line and get the quickfix fields.
827  * Return the QF_ status.
828  */
829     static int
830 qf_parse_line(
831 	qf_info_T	*qi,
832 	int		qf_idx,
833 	char_u		*linebuf,
834 	int		linelen,
835 	efm_T		*fmt_first,
836 	qffields_T	*fields)
837 {
838     efm_T		*fmt_ptr;
839     char_u		*ptr;
840     int			len;
841     int			i;
842     int			idx = 0;
843     char_u		*tail = NULL;
844     regmatch_T		regmatch;
845     qf_list_T		*qfl = &qi->qf_lists[qf_idx];
846 
847     /* Always ignore case when looking for a matching error. */
848     regmatch.rm_ic = TRUE;
849 
850     /* If there was no %> item start at the first pattern */
851     if (fmt_start == NULL)
852 	fmt_ptr = fmt_first;
853     else
854     {
855 	fmt_ptr = fmt_start;
856 	fmt_start = NULL;
857     }
858 
859     /*
860      * Try to match each part of 'errorformat' until we find a complete
861      * match or no match.
862      */
863     fields->valid = TRUE;
864 restofline:
865     for ( ; fmt_ptr != NULL; fmt_ptr = fmt_ptr->next)
866     {
867 	int r;
868 
869 	idx = fmt_ptr->prefix;
870 	if (qfl->qf_multiscan && vim_strchr((char_u *)"OPQ", idx) == NULL)
871 	    continue;
872 	fields->namebuf[0] = NUL;
873 	fields->pattern[0] = NUL;
874 	if (!qfl->qf_multiscan)
875 	    fields->errmsg[0] = NUL;
876 	fields->lnum = 0;
877 	fields->col = 0;
878 	fields->use_viscol = FALSE;
879 	fields->enr = -1;
880 	fields->type = 0;
881 	tail = NULL;
882 
883 	regmatch.regprog = fmt_ptr->prog;
884 	r = vim_regexec(&regmatch, linebuf, (colnr_T)0);
885 	fmt_ptr->prog = regmatch.regprog;
886 	if (r)
887 	{
888 	    if ((idx == 'C' || idx == 'Z') && !qfl->qf_multiline)
889 		continue;
890 	    if (vim_strchr((char_u *)"EWI", idx) != NULL)
891 		fields->type = idx;
892 	    else
893 		fields->type = 0;
894 	    /*
895 	     * Extract error message data from matched line.
896 	     * We check for an actual submatch, because "\[" and "\]" in
897 	     * the 'errorformat' may cause the wrong submatch to be used.
898 	     */
899 	    if ((i = (int)fmt_ptr->addr[0]) > 0)		/* %f */
900 	    {
901 		int c;
902 
903 		if (regmatch.startp[i] == NULL || regmatch.endp[i] == NULL)
904 		    continue;
905 
906 		/* Expand ~/file and $HOME/file to full path. */
907 		c = *regmatch.endp[i];
908 		*regmatch.endp[i] = NUL;
909 		expand_env(regmatch.startp[i], fields->namebuf, CMDBUFFSIZE);
910 		*regmatch.endp[i] = c;
911 
912 		if (vim_strchr((char_u *)"OPQ", idx) != NULL
913 			&& mch_getperm(fields->namebuf) == -1)
914 		    continue;
915 	    }
916 	    if ((i = (int)fmt_ptr->addr[1]) > 0)		/* %n */
917 	    {
918 		if (regmatch.startp[i] == NULL)
919 		    continue;
920 		fields->enr = (int)atol((char *)regmatch.startp[i]);
921 	    }
922 	    if ((i = (int)fmt_ptr->addr[2]) > 0)		/* %l */
923 	    {
924 		if (regmatch.startp[i] == NULL)
925 		    continue;
926 		fields->lnum = atol((char *)regmatch.startp[i]);
927 	    }
928 	    if ((i = (int)fmt_ptr->addr[3]) > 0)		/* %c */
929 	    {
930 		if (regmatch.startp[i] == NULL)
931 		    continue;
932 		fields->col = (int)atol((char *)regmatch.startp[i]);
933 	    }
934 	    if ((i = (int)fmt_ptr->addr[4]) > 0)		/* %t */
935 	    {
936 		if (regmatch.startp[i] == NULL)
937 		    continue;
938 		fields->type = *regmatch.startp[i];
939 	    }
940 	    if (fmt_ptr->flags == '+' && !qfl->qf_multiscan)	/* %+ */
941 	    {
942 		if (linelen >= fields->errmsglen)
943 		{
944 		    /* linelen + null terminator */
945 		    if ((fields->errmsg = vim_realloc(fields->errmsg,
946 				    linelen + 1)) == NULL)
947 			return QF_NOMEM;
948 		    fields->errmsglen = linelen + 1;
949 		}
950 		vim_strncpy(fields->errmsg, linebuf, linelen);
951 	    }
952 	    else if ((i = (int)fmt_ptr->addr[5]) > 0)	/* %m */
953 	    {
954 		if (regmatch.startp[i] == NULL || regmatch.endp[i] == NULL)
955 		    continue;
956 		len = (int)(regmatch.endp[i] - regmatch.startp[i]);
957 		if (len >= fields->errmsglen)
958 		{
959 		    /* len + null terminator */
960 		    if ((fields->errmsg = vim_realloc(fields->errmsg, len + 1))
961 			    == NULL)
962 			return QF_NOMEM;
963 		    fields->errmsglen = len + 1;
964 		}
965 		vim_strncpy(fields->errmsg, regmatch.startp[i], len);
966 	    }
967 	    if ((i = (int)fmt_ptr->addr[6]) > 0)		/* %r */
968 	    {
969 		if (regmatch.startp[i] == NULL)
970 		    continue;
971 		tail = regmatch.startp[i];
972 	    }
973 	    if ((i = (int)fmt_ptr->addr[7]) > 0)		/* %p */
974 	    {
975 		char_u	*match_ptr;
976 
977 		if (regmatch.startp[i] == NULL || regmatch.endp[i] == NULL)
978 		    continue;
979 		fields->col = 0;
980 		for (match_ptr = regmatch.startp[i];
981 			match_ptr != regmatch.endp[i]; ++match_ptr)
982 		{
983 		    ++fields->col;
984 		    if (*match_ptr == TAB)
985 		    {
986 			fields->col += 7;
987 			fields->col -= fields->col % 8;
988 		    }
989 		}
990 		++fields->col;
991 		fields->use_viscol = TRUE;
992 	    }
993 	    if ((i = (int)fmt_ptr->addr[8]) > 0)		/* %v */
994 	    {
995 		if (regmatch.startp[i] == NULL)
996 		    continue;
997 		fields->col = (int)atol((char *)regmatch.startp[i]);
998 		fields->use_viscol = TRUE;
999 	    }
1000 	    if ((i = (int)fmt_ptr->addr[9]) > 0)		/* %s */
1001 	    {
1002 		if (regmatch.startp[i] == NULL || regmatch.endp[i] == NULL)
1003 		    continue;
1004 		len = (int)(regmatch.endp[i] - regmatch.startp[i]);
1005 		if (len > CMDBUFFSIZE - 5)
1006 		    len = CMDBUFFSIZE - 5;
1007 		STRCPY(fields->pattern, "^\\V");
1008 		STRNCAT(fields->pattern, regmatch.startp[i], len);
1009 		fields->pattern[len + 3] = '\\';
1010 		fields->pattern[len + 4] = '$';
1011 		fields->pattern[len + 5] = NUL;
1012 	    }
1013 	    break;
1014 	}
1015     }
1016     qfl->qf_multiscan = FALSE;
1017 
1018     if (fmt_ptr == NULL || idx == 'D' || idx == 'X')
1019     {
1020 	if (fmt_ptr != NULL)
1021 	{
1022 	    if (idx == 'D')				/* enter directory */
1023 	    {
1024 		if (*fields->namebuf == NUL)
1025 		{
1026 		    EMSG(_("E379: Missing or empty directory name"));
1027 		    return QF_FAIL;
1028 		}
1029 		qfl->qf_directory =
1030 		    qf_push_dir(fields->namebuf, &qfl->qf_dir_stack, FALSE);
1031 		if (qfl->qf_directory == NULL)
1032 		    return QF_FAIL;
1033 	    }
1034 	    else if (idx == 'X')			/* leave directory */
1035 		qfl->qf_directory = qf_pop_dir(&qfl->qf_dir_stack);
1036 	}
1037 	fields->namebuf[0] = NUL;	/* no match found, remove file name */
1038 	fields->lnum = 0;			/* don't jump to this line */
1039 	fields->valid = FALSE;
1040 	if (linelen >= fields->errmsglen)
1041 	{
1042 	    /* linelen + null terminator */
1043 	    if ((fields->errmsg = vim_realloc(fields->errmsg,
1044 			    linelen + 1)) == NULL)
1045 		return QF_NOMEM;
1046 	    fields->errmsglen = linelen + 1;
1047 	}
1048 	/* copy whole line to error message */
1049 	vim_strncpy(fields->errmsg, linebuf, linelen);
1050 	if (fmt_ptr == NULL)
1051 	    qfl->qf_multiline = qfl->qf_multiignore = FALSE;
1052     }
1053     else if (fmt_ptr != NULL)
1054     {
1055 	/* honor %> item */
1056 	if (fmt_ptr->conthere)
1057 	    fmt_start = fmt_ptr;
1058 
1059 	if (vim_strchr((char_u *)"AEWI", idx) != NULL)
1060 	{
1061 	    qfl->qf_multiline = TRUE;	/* start of a multi-line message */
1062 	    qfl->qf_multiignore = FALSE;/* reset continuation */
1063 	}
1064 	else if (vim_strchr((char_u *)"CZ", idx) != NULL)
1065 	{				/* continuation of multi-line msg */
1066 	    if (!qfl->qf_multiignore)
1067 	    {
1068 		qfline_T *qfprev = qfl->qf_last;
1069 
1070 		if (qfprev == NULL)
1071 		    return QF_FAIL;
1072 		if (*fields->errmsg && !qfl->qf_multiignore)
1073 		{
1074 		    len = (int)STRLEN(qfprev->qf_text);
1075 		    if ((ptr = alloc((unsigned)(len + STRLEN(fields->errmsg) + 2)))
1076 			    == NULL)
1077 			return QF_FAIL;
1078 		    STRCPY(ptr, qfprev->qf_text);
1079 		    vim_free(qfprev->qf_text);
1080 		    qfprev->qf_text = ptr;
1081 		    *(ptr += len) = '\n';
1082 		    STRCPY(++ptr, fields->errmsg);
1083 		}
1084 		if (qfprev->qf_nr == -1)
1085 		    qfprev->qf_nr = fields->enr;
1086 		if (vim_isprintc(fields->type) && !qfprev->qf_type)
1087 		    /* only printable chars allowed */
1088 		    qfprev->qf_type = fields->type;
1089 
1090 		if (!qfprev->qf_lnum)
1091 		    qfprev->qf_lnum = fields->lnum;
1092 		if (!qfprev->qf_col)
1093 		    qfprev->qf_col = fields->col;
1094 		qfprev->qf_viscol = fields->use_viscol;
1095 		if (!qfprev->qf_fnum)
1096 		    qfprev->qf_fnum = qf_get_fnum(qi, qf_idx,
1097 			    qfl->qf_directory,
1098 			    *fields->namebuf || qfl->qf_directory != NULL
1099 			    ? fields->namebuf
1100 			    : qfl->qf_currfile != NULL && fields->valid
1101 			    ? qfl->qf_currfile : 0);
1102 	    }
1103 	    if (idx == 'Z')
1104 		qfl->qf_multiline = qfl->qf_multiignore = FALSE;
1105 	    line_breakcheck();
1106 	    return QF_IGNORE_LINE;
1107 	}
1108 	else if (vim_strchr((char_u *)"OPQ", idx) != NULL)
1109 	{
1110 	    /* global file names */
1111 	    fields->valid = FALSE;
1112 	    if (*fields->namebuf == NUL || mch_getperm(fields->namebuf) >= 0)
1113 	    {
1114 		if (*fields->namebuf && idx == 'P')
1115 		    qfl->qf_currfile =
1116 			qf_push_dir(fields->namebuf, &qfl->qf_file_stack, TRUE);
1117 		else if (idx == 'Q')
1118 		    qfl->qf_currfile = qf_pop_dir(&qfl->qf_file_stack);
1119 		*fields->namebuf = NUL;
1120 		if (tail && *tail)
1121 		{
1122 		    STRMOVE(IObuff, skipwhite(tail));
1123 		    qfl->qf_multiscan = TRUE;
1124 		    goto restofline;
1125 		}
1126 	    }
1127 	}
1128 	if (fmt_ptr->flags == '-')	/* generally exclude this line */
1129 	{
1130 	    if (qfl->qf_multiline)
1131 		/* also exclude continuation lines */
1132 		qfl->qf_multiignore = TRUE;
1133 	    return QF_IGNORE_LINE;
1134 	}
1135     }
1136 
1137     return QF_OK;
1138 }
1139 
1140 /*
1141  * Read the errorfile "efile" into memory, line by line, building the error
1142  * list.
1143  * Alternative: when "efile" is NULL read errors from buffer "buf".
1144  * Alternative: when "tv" is not NULL get errors from the string or list.
1145  * Always use 'errorformat' from "buf" if there is a local value.
1146  * Then "lnumfirst" and "lnumlast" specify the range of lines to use.
1147  * Set the title of the list to "qf_title".
1148  * Return -1 for error, number of errors for success.
1149  */
1150     static int
1151 qf_init_ext(
1152     qf_info_T	    *qi,
1153     int		    qf_idx,
1154     char_u	    *efile,
1155     buf_T	    *buf,
1156     typval_T	    *tv,
1157     char_u	    *errorformat,
1158     int		    newlist,		/* TRUE: start a new error list */
1159     linenr_T	    lnumfirst,		/* first line number to use */
1160     linenr_T	    lnumlast,		/* last line number to use */
1161     char_u	    *qf_title,
1162     char_u	    *enc)
1163 {
1164     qf_list_T	    *qfl;
1165     qfstate_T	    state;
1166     qffields_T	    fields;
1167 #ifdef FEAT_WINDOWS
1168     qfline_T	    *old_last = NULL;
1169 #endif
1170     int		    adding = FALSE;
1171     static efm_T    *fmt_first = NULL;
1172     char_u	    *efm;
1173     static char_u   *last_efm = NULL;
1174     int		    retval = -1;	/* default: return error flag */
1175     int		    status;
1176 
1177     /* Do not used the cached buffer, it may have been wiped out. */
1178     vim_free(qf_last_bufname);
1179     qf_last_bufname = NULL;
1180 
1181     vim_memset(&state, 0, sizeof(state));
1182     vim_memset(&fields, 0, sizeof(fields));
1183 #ifdef FEAT_MBYTE
1184     state.vc.vc_type = CONV_NONE;
1185     if (enc != NULL && *enc != NUL)
1186 	convert_setup(&state.vc, enc, p_enc);
1187 #endif
1188     fields.namebuf = alloc_id(CMDBUFFSIZE + 1, aid_qf_namebuf);
1189     fields.errmsglen = CMDBUFFSIZE + 1;
1190     fields.errmsg = alloc_id(fields.errmsglen, aid_qf_errmsg);
1191     fields.pattern = alloc_id(CMDBUFFSIZE + 1, aid_qf_pattern);
1192     if (fields.namebuf == NULL || fields.errmsg == NULL ||
1193 	    fields.pattern == NULL)
1194 	goto qf_init_end;
1195 
1196     if (efile != NULL && (state.fd = mch_fopen((char *)efile, "r")) == NULL)
1197     {
1198 	EMSG2(_(e_openerrf), efile);
1199 	goto qf_init_end;
1200     }
1201 
1202     if (newlist || qf_idx == qi->qf_listcount)
1203     {
1204 	/* make place for a new list */
1205 	qf_new_list(qi, qf_title);
1206 	qf_idx = qi->qf_curlist;
1207     }
1208     else
1209     {
1210 	/* Adding to existing list, use last entry. */
1211 	adding = TRUE;
1212 #ifdef FEAT_WINDOWS
1213 	if (qi->qf_lists[qf_idx].qf_count > 0)
1214 	    old_last = qi->qf_lists[qf_idx].qf_last;
1215 #endif
1216     }
1217 
1218     qfl = &qi->qf_lists[qf_idx];
1219 
1220     /* Use the local value of 'errorformat' if it's set. */
1221     if (errorformat == p_efm && tv == NULL && *buf->b_p_efm != NUL)
1222 	efm = buf->b_p_efm;
1223     else
1224 	efm = errorformat;
1225 
1226     /*
1227      * If the errorformat didn't change between calls, then reuse the
1228      * previously parsed values.
1229      */
1230     if (last_efm == NULL || (STRCMP(last_efm, efm) != 0))
1231     {
1232 	/* free the previously parsed data */
1233 	vim_free(last_efm);
1234 	last_efm = NULL;
1235 	free_efm_list(&fmt_first);
1236 
1237 	/* parse the current 'efm' */
1238 	fmt_first = parse_efm_option(efm);
1239 	if (fmt_first != NULL)
1240 	    last_efm = vim_strsave(efm);
1241     }
1242 
1243     if (fmt_first == NULL)	/* nothing found */
1244 	goto error2;
1245 
1246     /*
1247      * got_int is reset here, because it was probably set when killing the
1248      * ":make" command, but we still want to read the errorfile then.
1249      */
1250     got_int = FALSE;
1251 
1252     if (tv != NULL)
1253     {
1254 	if (tv->v_type == VAR_STRING)
1255 	    state.p_str = tv->vval.v_string;
1256 	else if (tv->v_type == VAR_LIST)
1257 	    state.p_li = tv->vval.v_list->lv_first;
1258 	state.tv = tv;
1259     }
1260     state.buf = buf;
1261     state.buflnum = lnumfirst;
1262     state.lnumlast = lnumlast;
1263 
1264     /*
1265      * Read the lines in the error file one by one.
1266      * Try to recognize one of the error formats in each line.
1267      */
1268     while (!got_int)
1269     {
1270 	/* Get the next line from a file/buffer/list/string */
1271 	status = qf_get_nextline(&state);
1272 	if (status == QF_NOMEM)		/* memory alloc failure */
1273 	    goto qf_init_end;
1274 	if (status == QF_END_OF_INPUT)	/* end of input */
1275 	    break;
1276 
1277 	status = qf_parse_line(qi, qf_idx, state.linebuf, state.linelen,
1278 							fmt_first, &fields);
1279 	if (status == QF_FAIL)
1280 	    goto error2;
1281 	if (status == QF_NOMEM)
1282 	    goto qf_init_end;
1283 	if (status == QF_IGNORE_LINE)
1284 	    continue;
1285 
1286 	if (qf_add_entry(qi,
1287 			qf_idx,
1288 			qfl->qf_directory,
1289 			(*fields.namebuf || qfl->qf_directory != NULL)
1290 			    ? fields.namebuf
1291 			    : ((qfl->qf_currfile != NULL && fields.valid)
1292 				? qfl->qf_currfile : (char_u *)NULL),
1293 			0,
1294 			fields.errmsg,
1295 			fields.lnum,
1296 			fields.col,
1297 			fields.use_viscol,
1298 			fields.pattern,
1299 			fields.enr,
1300 			fields.type,
1301 			fields.valid) == FAIL)
1302 	    goto error2;
1303 	line_breakcheck();
1304     }
1305     if (state.fd == NULL || !ferror(state.fd))
1306     {
1307 	if (qfl->qf_index == 0)
1308 	{
1309 	    /* no valid entry found */
1310 	    qfl->qf_ptr = qfl->qf_start;
1311 	    qfl->qf_index = 1;
1312 	    qfl->qf_nonevalid = TRUE;
1313 	}
1314 	else
1315 	{
1316 	    qfl->qf_nonevalid = FALSE;
1317 	    if (qfl->qf_ptr == NULL)
1318 		qfl->qf_ptr = qfl->qf_start;
1319 	}
1320 	/* return number of matches */
1321 	retval = qfl->qf_count;
1322 	goto qf_init_end;
1323     }
1324     EMSG(_(e_readerrf));
1325 error2:
1326     if (!adding)
1327     {
1328 	/* Error when creating a new list. Free the new list */
1329 	qf_free(qi, qi->qf_curlist);
1330 	qi->qf_listcount--;
1331 	if (qi->qf_curlist > 0)
1332 	    --qi->qf_curlist;
1333     }
1334 qf_init_end:
1335     if (state.fd != NULL)
1336 	fclose(state.fd);
1337     vim_free(fields.namebuf);
1338     vim_free(fields.errmsg);
1339     vim_free(fields.pattern);
1340     vim_free(state.growbuf);
1341 
1342 #ifdef FEAT_WINDOWS
1343     if (qf_idx == qi->qf_curlist)
1344 	qf_update_buffer(qi, old_last);
1345 #endif
1346 #ifdef FEAT_MBYTE
1347     if (state.vc.vc_type != CONV_NONE)
1348 	convert_setup(&state.vc, NULL, NULL);
1349 #endif
1350 
1351     return retval;
1352 }
1353 
1354     static void
1355 qf_store_title(qf_info_T *qi, int qf_idx, char_u *title)
1356 {
1357     vim_free(qi->qf_lists[qf_idx].qf_title);
1358     qi->qf_lists[qf_idx].qf_title = NULL;
1359 
1360     if (title != NULL)
1361     {
1362 	char_u *p = alloc((int)STRLEN(title) + 2);
1363 
1364 	qi->qf_lists[qf_idx].qf_title = p;
1365 	if (p != NULL)
1366 	    sprintf((char *)p, ":%s", (char *)title);
1367     }
1368 }
1369 
1370 /*
1371  * Prepare for adding a new quickfix list.
1372  */
1373     static void
1374 qf_new_list(qf_info_T *qi, char_u *qf_title)
1375 {
1376     int		i;
1377 
1378     /*
1379      * If the current entry is not the last entry, delete entries beyond
1380      * the current entry.  This makes it possible to browse in a tree-like
1381      * way with ":grep'.
1382      */
1383     while (qi->qf_listcount > qi->qf_curlist + 1)
1384 	qf_free(qi, --qi->qf_listcount);
1385 
1386     /*
1387      * When the stack is full, remove to oldest entry
1388      * Otherwise, add a new entry.
1389      */
1390     if (qi->qf_listcount == LISTCOUNT)
1391     {
1392 	qf_free(qi, 0);
1393 	for (i = 1; i < LISTCOUNT; ++i)
1394 	    qi->qf_lists[i - 1] = qi->qf_lists[i];
1395 	qi->qf_curlist = LISTCOUNT - 1;
1396     }
1397     else
1398 	qi->qf_curlist = qi->qf_listcount++;
1399     vim_memset(&qi->qf_lists[qi->qf_curlist], 0, (size_t)(sizeof(qf_list_T)));
1400     qf_store_title(qi, qi->qf_curlist, qf_title);
1401 }
1402 
1403 /*
1404  * Free a location list
1405  */
1406     static void
1407 ll_free_all(qf_info_T **pqi)
1408 {
1409     int		i;
1410     qf_info_T	*qi;
1411 
1412     qi = *pqi;
1413     if (qi == NULL)
1414 	return;
1415     *pqi = NULL;	/* Remove reference to this list */
1416 
1417     qi->qf_refcount--;
1418     if (qi->qf_refcount < 1)
1419     {
1420 	/* No references to this location list */
1421 	for (i = 0; i < qi->qf_listcount; ++i)
1422 	    qf_free(qi, i);
1423 	vim_free(qi);
1424     }
1425 }
1426 
1427     void
1428 qf_free_all(win_T *wp)
1429 {
1430     int		i;
1431     qf_info_T	*qi = &ql_info;
1432 
1433     if (wp != NULL)
1434     {
1435 	/* location list */
1436 	ll_free_all(&wp->w_llist);
1437 	ll_free_all(&wp->w_llist_ref);
1438     }
1439     else
1440 	/* quickfix list */
1441 	for (i = 0; i < qi->qf_listcount; ++i)
1442 	    qf_free(qi, i);
1443 }
1444 
1445 /*
1446  * Add an entry to the end of the list of errors.
1447  * Returns OK or FAIL.
1448  */
1449     static int
1450 qf_add_entry(
1451     qf_info_T	*qi,		/* quickfix list */
1452     int		qf_idx,		/* list index */
1453     char_u	*dir,		/* optional directory name */
1454     char_u	*fname,		/* file name or NULL */
1455     int		bufnum,		/* buffer number or zero */
1456     char_u	*mesg,		/* message */
1457     long	lnum,		/* line number */
1458     int		col,		/* column */
1459     int		vis_col,	/* using visual column */
1460     char_u	*pattern,	/* search pattern */
1461     int		nr,		/* error number */
1462     int		type,		/* type character */
1463     int		valid)		/* valid entry */
1464 {
1465     qfline_T	*qfp;
1466     qfline_T	**lastp;	/* pointer to qf_last or NULL */
1467 
1468     if ((qfp = (qfline_T *)alloc((unsigned)sizeof(qfline_T))) == NULL)
1469 	return FAIL;
1470     if (bufnum != 0)
1471     {
1472 	buf_T *buf = buflist_findnr(bufnum);
1473 
1474 	qfp->qf_fnum = bufnum;
1475 	if (buf != NULL)
1476 	    buf->b_has_qf_entry |=
1477 		(qi == &ql_info) ? BUF_HAS_QF_ENTRY : BUF_HAS_LL_ENTRY;
1478     }
1479     else
1480 	qfp->qf_fnum = qf_get_fnum(qi, qf_idx, dir, fname);
1481     if ((qfp->qf_text = vim_strsave(mesg)) == NULL)
1482     {
1483 	vim_free(qfp);
1484 	return FAIL;
1485     }
1486     qfp->qf_lnum = lnum;
1487     qfp->qf_col = col;
1488     qfp->qf_viscol = vis_col;
1489     if (pattern == NULL || *pattern == NUL)
1490 	qfp->qf_pattern = NULL;
1491     else if ((qfp->qf_pattern = vim_strsave(pattern)) == NULL)
1492     {
1493 	vim_free(qfp->qf_text);
1494 	vim_free(qfp);
1495 	return FAIL;
1496     }
1497     qfp->qf_nr = nr;
1498     if (type != 1 && !vim_isprintc(type)) /* only printable chars allowed */
1499 	type = 0;
1500     qfp->qf_type = type;
1501     qfp->qf_valid = valid;
1502 
1503     lastp = &qi->qf_lists[qf_idx].qf_last;
1504     if (qi->qf_lists[qf_idx].qf_count == 0)
1505 				/* first element in the list */
1506     {
1507 	qi->qf_lists[qf_idx].qf_start = qfp;
1508 	qi->qf_lists[qf_idx].qf_ptr = qfp;
1509 	qi->qf_lists[qf_idx].qf_index = 0;
1510 	qfp->qf_prev = NULL;
1511     }
1512     else
1513     {
1514 	qfp->qf_prev = *lastp;
1515 	(*lastp)->qf_next = qfp;
1516     }
1517     qfp->qf_next = NULL;
1518     qfp->qf_cleared = FALSE;
1519     *lastp = qfp;
1520     ++qi->qf_lists[qf_idx].qf_count;
1521     if (qi->qf_lists[qf_idx].qf_index == 0 && qfp->qf_valid)
1522 				/* first valid entry */
1523     {
1524 	qi->qf_lists[qf_idx].qf_index =
1525 	    qi->qf_lists[qf_idx].qf_count;
1526 	qi->qf_lists[qf_idx].qf_ptr = qfp;
1527     }
1528 
1529     return OK;
1530 }
1531 
1532 /*
1533  * Allocate a new location list
1534  */
1535     static qf_info_T *
1536 ll_new_list(void)
1537 {
1538     qf_info_T *qi;
1539 
1540     qi = (qf_info_T *)alloc((unsigned)sizeof(qf_info_T));
1541     if (qi != NULL)
1542     {
1543 	vim_memset(qi, 0, (size_t)(sizeof(qf_info_T)));
1544 	qi->qf_refcount++;
1545     }
1546 
1547     return qi;
1548 }
1549 
1550 /*
1551  * Return the location list for window 'wp'.
1552  * If not present, allocate a location list
1553  */
1554     static qf_info_T *
1555 ll_get_or_alloc_list(win_T *wp)
1556 {
1557     if (IS_LL_WINDOW(wp))
1558 	/* For a location list window, use the referenced location list */
1559 	return wp->w_llist_ref;
1560 
1561     /*
1562      * For a non-location list window, w_llist_ref should not point to a
1563      * location list.
1564      */
1565     ll_free_all(&wp->w_llist_ref);
1566 
1567     if (wp->w_llist == NULL)
1568 	wp->w_llist = ll_new_list();	    /* new location list */
1569     return wp->w_llist;
1570 }
1571 
1572 /*
1573  * Copy the location list from window "from" to window "to".
1574  */
1575     void
1576 copy_loclist(win_T *from, win_T *to)
1577 {
1578     qf_info_T	*qi;
1579     int		idx;
1580     int		i;
1581 
1582     /*
1583      * When copying from a location list window, copy the referenced
1584      * location list. For other windows, copy the location list for
1585      * that window.
1586      */
1587     if (IS_LL_WINDOW(from))
1588 	qi = from->w_llist_ref;
1589     else
1590 	qi = from->w_llist;
1591 
1592     if (qi == NULL)		    /* no location list to copy */
1593 	return;
1594 
1595     /* allocate a new location list */
1596     if ((to->w_llist = ll_new_list()) == NULL)
1597 	return;
1598 
1599     to->w_llist->qf_listcount = qi->qf_listcount;
1600 
1601     /* Copy the location lists one at a time */
1602     for (idx = 0; idx < qi->qf_listcount; idx++)
1603     {
1604 	qf_list_T   *from_qfl;
1605 	qf_list_T   *to_qfl;
1606 
1607 	to->w_llist->qf_curlist = idx;
1608 
1609 	from_qfl = &qi->qf_lists[idx];
1610 	to_qfl = &to->w_llist->qf_lists[idx];
1611 
1612 	/* Some of the fields are populated by qf_add_entry() */
1613 	to_qfl->qf_nonevalid = from_qfl->qf_nonevalid;
1614 	to_qfl->qf_count = 0;
1615 	to_qfl->qf_index = 0;
1616 	to_qfl->qf_start = NULL;
1617 	to_qfl->qf_last = NULL;
1618 	to_qfl->qf_ptr = NULL;
1619 	if (from_qfl->qf_title != NULL)
1620 	    to_qfl->qf_title = vim_strsave(from_qfl->qf_title);
1621 	else
1622 	    to_qfl->qf_title = NULL;
1623 	if (from_qfl->qf_ctx != NULL)
1624 	{
1625 	    to_qfl->qf_ctx = alloc_tv();
1626 	    if (to_qfl->qf_ctx != NULL)
1627 		copy_tv(from_qfl->qf_ctx, to_qfl->qf_ctx);
1628 	}
1629 	else
1630 	    to_qfl->qf_ctx = NULL;
1631 
1632 	if (from_qfl->qf_count)
1633 	{
1634 	    qfline_T    *from_qfp;
1635 	    qfline_T    *prevp;
1636 
1637 	    /* copy all the location entries in this list */
1638 	    for (i = 0, from_qfp = from_qfl->qf_start;
1639 		    i < from_qfl->qf_count && from_qfp != NULL;
1640 		    ++i, from_qfp = from_qfp->qf_next)
1641 	    {
1642 		if (qf_add_entry(to->w_llist,
1643 				 to->w_llist->qf_curlist,
1644 				 NULL,
1645 				 NULL,
1646 				 0,
1647 				 from_qfp->qf_text,
1648 				 from_qfp->qf_lnum,
1649 				 from_qfp->qf_col,
1650 				 from_qfp->qf_viscol,
1651 				 from_qfp->qf_pattern,
1652 				 from_qfp->qf_nr,
1653 				 0,
1654 				 from_qfp->qf_valid) == FAIL)
1655 		{
1656 		    qf_free_all(to);
1657 		    return;
1658 		}
1659 		/*
1660 		 * qf_add_entry() will not set the qf_num field, as the
1661 		 * directory and file names are not supplied. So the qf_fnum
1662 		 * field is copied here.
1663 		 */
1664 		prevp = to->w_llist->qf_lists[to->w_llist->qf_curlist].qf_last;
1665 		prevp->qf_fnum = from_qfp->qf_fnum; /* file number */
1666 		prevp->qf_type = from_qfp->qf_type; /* error type */
1667 		if (from_qfl->qf_ptr == from_qfp)
1668 		    to_qfl->qf_ptr = prevp;	    /* current location */
1669 	    }
1670 	}
1671 
1672 	to_qfl->qf_index = from_qfl->qf_index;	/* current index in the list */
1673 
1674 	/* When no valid entries are present in the list, qf_ptr points to
1675 	 * the first item in the list */
1676 	if (to_qfl->qf_nonevalid)
1677 	{
1678 	    to_qfl->qf_ptr = to_qfl->qf_start;
1679 	    to_qfl->qf_index = 1;
1680 	}
1681     }
1682 
1683     to->w_llist->qf_curlist = qi->qf_curlist;	/* current list */
1684 }
1685 
1686 /*
1687  * Get buffer number for file "directory/fname".
1688  * Also sets the b_has_qf_entry flag.
1689  */
1690     static int
1691 qf_get_fnum(qf_info_T *qi, int qf_idx, char_u *directory, char_u *fname)
1692 {
1693     char_u	*ptr = NULL;
1694     buf_T	*buf;
1695     char_u	*bufname;
1696 
1697     if (fname == NULL || *fname == NUL)		/* no file name */
1698 	return 0;
1699 
1700 #ifdef VMS
1701     vms_remove_version(fname);
1702 #endif
1703 #ifdef BACKSLASH_IN_FILENAME
1704     if (directory != NULL)
1705 	slash_adjust(directory);
1706     slash_adjust(fname);
1707 #endif
1708     if (directory != NULL && !vim_isAbsName(fname)
1709 	    && (ptr = concat_fnames(directory, fname, TRUE)) != NULL)
1710     {
1711 	/*
1712 	 * Here we check if the file really exists.
1713 	 * This should normally be true, but if make works without
1714 	 * "leaving directory"-messages we might have missed a
1715 	 * directory change.
1716 	 */
1717 	if (mch_getperm(ptr) < 0)
1718 	{
1719 	    vim_free(ptr);
1720 	    directory = qf_guess_filepath(qi, qf_idx, fname);
1721 	    if (directory)
1722 		ptr = concat_fnames(directory, fname, TRUE);
1723 	    else
1724 		ptr = vim_strsave(fname);
1725 	}
1726 	/* Use concatenated directory name and file name */
1727 	bufname = ptr;
1728     }
1729     else
1730 	bufname = fname;
1731 
1732     if (qf_last_bufname != NULL && STRCMP(bufname, qf_last_bufname) == 0
1733 	    && bufref_valid(&qf_last_bufref))
1734     {
1735 	buf = qf_last_bufref.br_buf;
1736 	vim_free(ptr);
1737     }
1738     else
1739     {
1740 	vim_free(qf_last_bufname);
1741 	buf = buflist_new(bufname, NULL, (linenr_T)0, BLN_NOOPT);
1742 	if (bufname == ptr)
1743 	    qf_last_bufname = bufname;
1744 	else
1745 	    qf_last_bufname = vim_strsave(bufname);
1746 	set_bufref(&qf_last_bufref, buf);
1747     }
1748     if (buf == NULL)
1749 	return 0;
1750 
1751     buf->b_has_qf_entry =
1752 			(qi == &ql_info) ? BUF_HAS_QF_ENTRY : BUF_HAS_LL_ENTRY;
1753     return buf->b_fnum;
1754 }
1755 
1756 /*
1757  * Push dirbuf onto the directory stack and return pointer to actual dir or
1758  * NULL on error.
1759  */
1760     static char_u *
1761 qf_push_dir(char_u *dirbuf, struct dir_stack_T **stackptr, int is_file_stack)
1762 {
1763     struct dir_stack_T  *ds_new;
1764     struct dir_stack_T  *ds_ptr;
1765 
1766     /* allocate new stack element and hook it in */
1767     ds_new = (struct dir_stack_T *)alloc((unsigned)sizeof(struct dir_stack_T));
1768     if (ds_new == NULL)
1769 	return NULL;
1770 
1771     ds_new->next = *stackptr;
1772     *stackptr = ds_new;
1773 
1774     /* store directory on the stack */
1775     if (vim_isAbsName(dirbuf)
1776 	    || (*stackptr)->next == NULL
1777 	    || (*stackptr && is_file_stack))
1778 	(*stackptr)->dirname = vim_strsave(dirbuf);
1779     else
1780     {
1781 	/* Okay we don't have an absolute path.
1782 	 * dirbuf must be a subdir of one of the directories on the stack.
1783 	 * Let's search...
1784 	 */
1785 	ds_new = (*stackptr)->next;
1786 	(*stackptr)->dirname = NULL;
1787 	while (ds_new)
1788 	{
1789 	    vim_free((*stackptr)->dirname);
1790 	    (*stackptr)->dirname = concat_fnames(ds_new->dirname, dirbuf,
1791 		    TRUE);
1792 	    if (mch_isdir((*stackptr)->dirname) == TRUE)
1793 		break;
1794 
1795 	    ds_new = ds_new->next;
1796 	}
1797 
1798 	/* clean up all dirs we already left */
1799 	while ((*stackptr)->next != ds_new)
1800 	{
1801 	    ds_ptr = (*stackptr)->next;
1802 	    (*stackptr)->next = (*stackptr)->next->next;
1803 	    vim_free(ds_ptr->dirname);
1804 	    vim_free(ds_ptr);
1805 	}
1806 
1807 	/* Nothing found -> it must be on top level */
1808 	if (ds_new == NULL)
1809 	{
1810 	    vim_free((*stackptr)->dirname);
1811 	    (*stackptr)->dirname = vim_strsave(dirbuf);
1812 	}
1813     }
1814 
1815     if ((*stackptr)->dirname != NULL)
1816 	return (*stackptr)->dirname;
1817     else
1818     {
1819 	ds_ptr = *stackptr;
1820 	*stackptr = (*stackptr)->next;
1821 	vim_free(ds_ptr);
1822 	return NULL;
1823     }
1824 }
1825 
1826 
1827 /*
1828  * pop dirbuf from the directory stack and return previous directory or NULL if
1829  * stack is empty
1830  */
1831     static char_u *
1832 qf_pop_dir(struct dir_stack_T **stackptr)
1833 {
1834     struct dir_stack_T  *ds_ptr;
1835 
1836     /* TODO: Should we check if dirbuf is the directory on top of the stack?
1837      * What to do if it isn't? */
1838 
1839     /* pop top element and free it */
1840     if (*stackptr != NULL)
1841     {
1842 	ds_ptr = *stackptr;
1843 	*stackptr = (*stackptr)->next;
1844 	vim_free(ds_ptr->dirname);
1845 	vim_free(ds_ptr);
1846     }
1847 
1848     /* return NEW top element as current dir or NULL if stack is empty*/
1849     return *stackptr ? (*stackptr)->dirname : NULL;
1850 }
1851 
1852 /*
1853  * clean up directory stack
1854  */
1855     static void
1856 qf_clean_dir_stack(struct dir_stack_T **stackptr)
1857 {
1858     struct dir_stack_T  *ds_ptr;
1859 
1860     while ((ds_ptr = *stackptr) != NULL)
1861     {
1862 	*stackptr = (*stackptr)->next;
1863 	vim_free(ds_ptr->dirname);
1864 	vim_free(ds_ptr);
1865     }
1866 }
1867 
1868 /*
1869  * Check in which directory of the directory stack the given file can be
1870  * found.
1871  * Returns a pointer to the directory name or NULL if not found.
1872  * Cleans up intermediate directory entries.
1873  *
1874  * TODO: How to solve the following problem?
1875  * If we have the this directory tree:
1876  *     ./
1877  *     ./aa
1878  *     ./aa/bb
1879  *     ./bb
1880  *     ./bb/x.c
1881  * and make says:
1882  *     making all in aa
1883  *     making all in bb
1884  *     x.c:9: Error
1885  * Then qf_push_dir thinks we are in ./aa/bb, but we are in ./bb.
1886  * qf_guess_filepath will return NULL.
1887  */
1888     static char_u *
1889 qf_guess_filepath(qf_info_T *qi, int qf_idx, char_u *filename)
1890 {
1891     struct dir_stack_T     *ds_ptr;
1892     struct dir_stack_T     *ds_tmp;
1893     char_u		   *fullname;
1894     qf_list_T		   *qfl = &qi->qf_lists[qf_idx];
1895 
1896     /* no dirs on the stack - there's nothing we can do */
1897     if (qfl->qf_dir_stack == NULL)
1898 	return NULL;
1899 
1900     ds_ptr = qfl->qf_dir_stack->next;
1901     fullname = NULL;
1902     while (ds_ptr)
1903     {
1904 	vim_free(fullname);
1905 	fullname = concat_fnames(ds_ptr->dirname, filename, TRUE);
1906 
1907 	/* If concat_fnames failed, just go on. The worst thing that can happen
1908 	 * is that we delete the entire stack.
1909 	 */
1910 	if ((fullname != NULL) && (mch_getperm(fullname) >= 0))
1911 	    break;
1912 
1913 	ds_ptr = ds_ptr->next;
1914     }
1915 
1916     vim_free(fullname);
1917 
1918     /* clean up all dirs we already left */
1919     while (qfl->qf_dir_stack->next != ds_ptr)
1920     {
1921 	ds_tmp = qfl->qf_dir_stack->next;
1922 	qfl->qf_dir_stack->next = qfl->qf_dir_stack->next->next;
1923 	vim_free(ds_tmp->dirname);
1924 	vim_free(ds_tmp);
1925     }
1926 
1927     return ds_ptr==NULL? NULL: ds_ptr->dirname;
1928 }
1929 
1930 /*
1931  * When loading a file from the quickfix, the auto commands may modify it.
1932  * This may invalidate the current quickfix entry.  This function checks
1933  * whether a entry is still present in the quickfix.
1934  * Similar to location list.
1935  */
1936     static int
1937 is_qf_entry_present(qf_info_T *qi, qfline_T *qf_ptr)
1938 {
1939     qf_list_T	*qfl;
1940     qfline_T	*qfp;
1941     int		i;
1942 
1943     qfl = &qi->qf_lists[qi->qf_curlist];
1944 
1945     /* Search for the entry in the current list */
1946     for (i = 0, qfp = qfl->qf_start; i < qfl->qf_count;
1947 	    ++i, qfp = qfp->qf_next)
1948 	if (qfp == NULL || qfp == qf_ptr)
1949 	    break;
1950 
1951     if (i == qfl->qf_count) /* Entry is not found */
1952 	return FALSE;
1953 
1954     return TRUE;
1955 }
1956 
1957 /*
1958  * jump to a quickfix line
1959  * if dir == FORWARD go "errornr" valid entries forward
1960  * if dir == BACKWARD go "errornr" valid entries backward
1961  * if dir == FORWARD_FILE go "errornr" valid entries files backward
1962  * if dir == BACKWARD_FILE go "errornr" valid entries files backward
1963  * else if "errornr" is zero, redisplay the same line
1964  * else go to entry "errornr"
1965  */
1966     void
1967 qf_jump(
1968     qf_info_T	*qi,
1969     int		dir,
1970     int		errornr,
1971     int		forceit)
1972 {
1973     qf_info_T		*ll_ref;
1974     qfline_T		*qf_ptr;
1975     qfline_T		*old_qf_ptr;
1976     int			qf_index;
1977     int			old_qf_fnum;
1978     int			old_qf_index;
1979     int			prev_index;
1980     static char_u	*e_no_more_items = (char_u *)N_("E553: No more items");
1981     char_u		*err = e_no_more_items;
1982     linenr_T		i;
1983     buf_T		*old_curbuf;
1984     linenr_T		old_lnum;
1985     colnr_T		screen_col;
1986     colnr_T		char_col;
1987     char_u		*line;
1988 #ifdef FEAT_WINDOWS
1989     char_u		*old_swb = p_swb;
1990     unsigned		old_swb_flags = swb_flags;
1991     int			opened_window = FALSE;
1992     win_T		*win;
1993     win_T		*altwin;
1994     int			flags;
1995 #endif
1996     win_T		*oldwin = curwin;
1997     int			print_message = TRUE;
1998     int			len;
1999 #ifdef FEAT_FOLDING
2000     int			old_KeyTyped = KeyTyped; /* getting file may reset it */
2001 #endif
2002     int			ok = OK;
2003     int			usable_win;
2004 
2005     if (qi == NULL)
2006 	qi = &ql_info;
2007 
2008     if (qi->qf_curlist >= qi->qf_listcount
2009 	|| qi->qf_lists[qi->qf_curlist].qf_count == 0)
2010     {
2011 	EMSG(_(e_quickfix));
2012 	return;
2013     }
2014 
2015     qf_ptr = qi->qf_lists[qi->qf_curlist].qf_ptr;
2016     old_qf_ptr = qf_ptr;
2017     qf_index = qi->qf_lists[qi->qf_curlist].qf_index;
2018     old_qf_index = qf_index;
2019     if (dir == FORWARD || dir == FORWARD_FILE)	    /* next valid entry */
2020     {
2021 	while (errornr--)
2022 	{
2023 	    old_qf_ptr = qf_ptr;
2024 	    prev_index = qf_index;
2025 	    old_qf_fnum = qf_ptr->qf_fnum;
2026 	    do
2027 	    {
2028 		if (qf_index == qi->qf_lists[qi->qf_curlist].qf_count
2029 						   || qf_ptr->qf_next == NULL)
2030 		{
2031 		    qf_ptr = old_qf_ptr;
2032 		    qf_index = prev_index;
2033 		    if (err != NULL)
2034 		    {
2035 			EMSG(_(err));
2036 			goto theend;
2037 		    }
2038 		    errornr = 0;
2039 		    break;
2040 		}
2041 		++qf_index;
2042 		qf_ptr = qf_ptr->qf_next;
2043 	    } while ((!qi->qf_lists[qi->qf_curlist].qf_nonevalid
2044 		      && !qf_ptr->qf_valid)
2045 		  || (dir == FORWARD_FILE && qf_ptr->qf_fnum == old_qf_fnum));
2046 	    err = NULL;
2047 	}
2048     }
2049     else if (dir == BACKWARD || dir == BACKWARD_FILE)  /* prev. valid entry */
2050     {
2051 	while (errornr--)
2052 	{
2053 	    old_qf_ptr = qf_ptr;
2054 	    prev_index = qf_index;
2055 	    old_qf_fnum = qf_ptr->qf_fnum;
2056 	    do
2057 	    {
2058 		if (qf_index == 1 || qf_ptr->qf_prev == NULL)
2059 		{
2060 		    qf_ptr = old_qf_ptr;
2061 		    qf_index = prev_index;
2062 		    if (err != NULL)
2063 		    {
2064 			EMSG(_(err));
2065 			goto theend;
2066 		    }
2067 		    errornr = 0;
2068 		    break;
2069 		}
2070 		--qf_index;
2071 		qf_ptr = qf_ptr->qf_prev;
2072 	    } while ((!qi->qf_lists[qi->qf_curlist].qf_nonevalid
2073 		      && !qf_ptr->qf_valid)
2074 		  || (dir == BACKWARD_FILE && qf_ptr->qf_fnum == old_qf_fnum));
2075 	    err = NULL;
2076 	}
2077     }
2078     else if (errornr != 0)	/* go to specified number */
2079     {
2080 	while (errornr < qf_index && qf_index > 1 && qf_ptr->qf_prev != NULL)
2081 	{
2082 	    --qf_index;
2083 	    qf_ptr = qf_ptr->qf_prev;
2084 	}
2085 	while (errornr > qf_index && qf_index <
2086 				    qi->qf_lists[qi->qf_curlist].qf_count
2087 						   && qf_ptr->qf_next != NULL)
2088 	{
2089 	    ++qf_index;
2090 	    qf_ptr = qf_ptr->qf_next;
2091 	}
2092     }
2093 
2094 #ifdef FEAT_WINDOWS
2095     qi->qf_lists[qi->qf_curlist].qf_index = qf_index;
2096     if (qf_win_pos_update(qi, old_qf_index))
2097 	/* No need to print the error message if it's visible in the error
2098 	 * window */
2099 	print_message = FALSE;
2100 
2101     /*
2102      * For ":helpgrep" find a help window or open one.
2103      */
2104     if (qf_ptr->qf_type == 1 && (!bt_help(curwin->w_buffer) || cmdmod.tab != 0))
2105     {
2106 	win_T	*wp;
2107 
2108 	if (cmdmod.tab != 0)
2109 	    wp = NULL;
2110 	else
2111 	    FOR_ALL_WINDOWS(wp)
2112 		if (bt_help(wp->w_buffer))
2113 		    break;
2114 	if (wp != NULL && wp->w_buffer->b_nwindows > 0)
2115 	    win_enter(wp, TRUE);
2116 	else
2117 	{
2118 	    /*
2119 	     * Split off help window; put it at far top if no position
2120 	     * specified, the current window is vertically split and narrow.
2121 	     */
2122 	    flags = WSP_HELP;
2123 	    if (cmdmod.split == 0 && curwin->w_width != Columns
2124 						      && curwin->w_width < 80)
2125 		flags |= WSP_TOP;
2126 	    if (qi != &ql_info)
2127 		flags |= WSP_NEWLOC;  /* don't copy the location list */
2128 
2129 	    if (win_split(0, flags) == FAIL)
2130 		goto theend;
2131 	    opened_window = TRUE;	/* close it when fail */
2132 
2133 	    if (curwin->w_height < p_hh)
2134 		win_setheight((int)p_hh);
2135 
2136 	    if (qi != &ql_info)	    /* not a quickfix list */
2137 	    {
2138 		/* The new window should use the supplied location list */
2139 		curwin->w_llist = qi;
2140 		qi->qf_refcount++;
2141 	    }
2142 	}
2143 
2144 	if (!p_im)
2145 	    restart_edit = 0;	    /* don't want insert mode in help file */
2146     }
2147 
2148     /*
2149      * If currently in the quickfix window, find another window to show the
2150      * file in.
2151      */
2152     if (bt_quickfix(curbuf) && !opened_window)
2153     {
2154 	win_T *usable_win_ptr = NULL;
2155 
2156 	/*
2157 	 * If there is no file specified, we don't know where to go.
2158 	 * But do advance, otherwise ":cn" gets stuck.
2159 	 */
2160 	if (qf_ptr->qf_fnum == 0)
2161 	    goto theend;
2162 
2163 	usable_win = 0;
2164 
2165 	ll_ref = curwin->w_llist_ref;
2166 	if (ll_ref != NULL)
2167 	{
2168 	    /* Find a window using the same location list that is not a
2169 	     * quickfix window. */
2170 	    FOR_ALL_WINDOWS(usable_win_ptr)
2171 		if (usable_win_ptr->w_llist == ll_ref
2172 			&& !bt_quickfix(usable_win_ptr->w_buffer))
2173 		{
2174 		    usable_win = 1;
2175 		    break;
2176 		}
2177 	}
2178 
2179 	if (!usable_win)
2180 	{
2181 	    /* Locate a window showing a normal buffer */
2182 	    FOR_ALL_WINDOWS(win)
2183 		if (win->w_buffer->b_p_bt[0] == NUL)
2184 		{
2185 		    usable_win = 1;
2186 		    break;
2187 		}
2188 	}
2189 
2190 	/*
2191 	 * If no usable window is found and 'switchbuf' contains "usetab"
2192 	 * then search in other tabs.
2193 	 */
2194 	if (!usable_win && (swb_flags & SWB_USETAB))
2195 	{
2196 	    tabpage_T	*tp;
2197 	    win_T	*wp;
2198 
2199 	    FOR_ALL_TAB_WINDOWS(tp, wp)
2200 	    {
2201 		if (wp->w_buffer->b_fnum == qf_ptr->qf_fnum)
2202 		{
2203 		    goto_tabpage_win(tp, wp);
2204 		    usable_win = 1;
2205 		    goto win_found;
2206 		}
2207 	    }
2208 	}
2209 win_found:
2210 
2211 	/*
2212 	 * If there is only one window and it is the quickfix window, create a
2213 	 * new one above the quickfix window.
2214 	 */
2215 	if ((ONE_WINDOW && bt_quickfix(curbuf)) || !usable_win)
2216 	{
2217 	    flags = WSP_ABOVE;
2218 	    if (ll_ref != NULL)
2219 		flags |= WSP_NEWLOC;
2220 	    if (win_split(0, flags) == FAIL)
2221 		goto failed;		/* not enough room for window */
2222 	    opened_window = TRUE;	/* close it when fail */
2223 	    p_swb = empty_option;	/* don't split again */
2224 	    swb_flags = 0;
2225 	    RESET_BINDING(curwin);
2226 	    if (ll_ref != NULL)
2227 	    {
2228 		/* The new window should use the location list from the
2229 		 * location list window */
2230 		curwin->w_llist = ll_ref;
2231 		ll_ref->qf_refcount++;
2232 	    }
2233 	}
2234 	else
2235 	{
2236 	    if (curwin->w_llist_ref != NULL)
2237 	    {
2238 		/* In a location window */
2239 		win = usable_win_ptr;
2240 		if (win == NULL)
2241 		{
2242 		    /* Find the window showing the selected file */
2243 		    FOR_ALL_WINDOWS(win)
2244 			if (win->w_buffer->b_fnum == qf_ptr->qf_fnum)
2245 			    break;
2246 		    if (win == NULL)
2247 		    {
2248 			/* Find a previous usable window */
2249 			win = curwin;
2250 			do
2251 			{
2252 			    if (win->w_buffer->b_p_bt[0] == NUL)
2253 				break;
2254 			    if (win->w_prev == NULL)
2255 				win = lastwin;	/* wrap around the top */
2256 			    else
2257 				win = win->w_prev; /* go to previous window */
2258 			} while (win != curwin);
2259 		    }
2260 		}
2261 		win_goto(win);
2262 
2263 		/* If the location list for the window is not set, then set it
2264 		 * to the location list from the location window */
2265 		if (win->w_llist == NULL)
2266 		{
2267 		    win->w_llist = ll_ref;
2268 		    ll_ref->qf_refcount++;
2269 		}
2270 	    }
2271 	    else
2272 	    {
2273 
2274 	    /*
2275 	     * Try to find a window that shows the right buffer.
2276 	     * Default to the window just above the quickfix buffer.
2277 	     */
2278 	    win = curwin;
2279 	    altwin = NULL;
2280 	    for (;;)
2281 	    {
2282 		if (win->w_buffer->b_fnum == qf_ptr->qf_fnum)
2283 		    break;
2284 		if (win->w_prev == NULL)
2285 		    win = lastwin;	/* wrap around the top */
2286 		else
2287 		    win = win->w_prev;	/* go to previous window */
2288 
2289 		if (IS_QF_WINDOW(win))
2290 		{
2291 		    /* Didn't find it, go to the window before the quickfix
2292 		     * window. */
2293 		    if (altwin != NULL)
2294 			win = altwin;
2295 		    else if (curwin->w_prev != NULL)
2296 			win = curwin->w_prev;
2297 		    else
2298 			win = curwin->w_next;
2299 		    break;
2300 		}
2301 
2302 		/* Remember a usable window. */
2303 		if (altwin == NULL && !win->w_p_pvw
2304 					   && win->w_buffer->b_p_bt[0] == NUL)
2305 		    altwin = win;
2306 	    }
2307 
2308 	    win_goto(win);
2309 	    }
2310 	}
2311     }
2312 #endif
2313 
2314     /*
2315      * If there is a file name,
2316      * read the wanted file if needed, and check autowrite etc.
2317      */
2318     old_curbuf = curbuf;
2319     old_lnum = curwin->w_cursor.lnum;
2320 
2321     if (qf_ptr->qf_fnum != 0)
2322     {
2323 	if (qf_ptr->qf_type == 1)
2324 	{
2325 	    /* Open help file (do_ecmd() will set b_help flag, readfile() will
2326 	     * set b_p_ro flag). */
2327 	    if (!can_abandon(curbuf, forceit))
2328 	    {
2329 		EMSG(_(e_nowrtmsg));
2330 		ok = FALSE;
2331 	    }
2332 	    else
2333 		ok = do_ecmd(qf_ptr->qf_fnum, NULL, NULL, NULL, (linenr_T)1,
2334 					   ECMD_HIDE + ECMD_SET_HELP,
2335 					   oldwin == curwin ? curwin : NULL);
2336 	}
2337 	else
2338 	{
2339 	    int old_qf_curlist = qi->qf_curlist;
2340 	    int is_abort = FALSE;
2341 
2342 	    ok = buflist_getfile(qf_ptr->qf_fnum,
2343 			    (linenr_T)1, GETF_SETMARK | GETF_SWITCH, forceit);
2344 	    if (qi != &ql_info && !win_valid_any_tab(oldwin))
2345 	    {
2346 		EMSG(_("E924: Current window was closed"));
2347 		is_abort = TRUE;
2348 		opened_window = FALSE;
2349 	    }
2350 	    else if (old_qf_curlist != qi->qf_curlist
2351 		    || !is_qf_entry_present(qi, qf_ptr))
2352 	    {
2353 		if (qi == &ql_info)
2354 		    EMSG(_("E925: Current quickfix was changed"));
2355 		else
2356 		    EMSG(_("E926: Current location list was changed"));
2357 		is_abort = TRUE;
2358 	    }
2359 
2360 	    if (is_abort)
2361 	    {
2362 		ok = FALSE;
2363 		qi = NULL;
2364 		qf_ptr = NULL;
2365 	    }
2366 	}
2367     }
2368 
2369     if (ok == OK)
2370     {
2371 	/* When not switched to another buffer, still need to set pc mark */
2372 	if (curbuf == old_curbuf)
2373 	    setpcmark();
2374 
2375 	if (qf_ptr->qf_pattern == NULL)
2376 	{
2377 	    /*
2378 	     * Go to line with error, unless qf_lnum is 0.
2379 	     */
2380 	    i = qf_ptr->qf_lnum;
2381 	    if (i > 0)
2382 	    {
2383 		if (i > curbuf->b_ml.ml_line_count)
2384 		    i = curbuf->b_ml.ml_line_count;
2385 		curwin->w_cursor.lnum = i;
2386 	    }
2387 	    if (qf_ptr->qf_col > 0)
2388 	    {
2389 		curwin->w_cursor.col = qf_ptr->qf_col - 1;
2390 #ifdef FEAT_VIRTUALEDIT
2391 		curwin->w_cursor.coladd = 0;
2392 #endif
2393 		if (qf_ptr->qf_viscol == TRUE)
2394 		{
2395 		    /*
2396 		     * Check each character from the beginning of the error
2397 		     * line up to the error column.  For each tab character
2398 		     * found, reduce the error column value by the length of
2399 		     * a tab character.
2400 		     */
2401 		    line = ml_get_curline();
2402 		    screen_col = 0;
2403 		    for (char_col = 0; char_col < curwin->w_cursor.col; ++char_col)
2404 		    {
2405 			if (*line == NUL)
2406 			    break;
2407 			if (*line++ == '\t')
2408 			{
2409 			    curwin->w_cursor.col -= 7 - (screen_col % 8);
2410 			    screen_col += 8 - (screen_col % 8);
2411 			}
2412 			else
2413 			    ++screen_col;
2414 		    }
2415 		}
2416 		check_cursor();
2417 	    }
2418 	    else
2419 		beginline(BL_WHITE | BL_FIX);
2420 	}
2421 	else
2422 	{
2423 	    pos_T save_cursor;
2424 
2425 	    /* Move the cursor to the first line in the buffer */
2426 	    save_cursor = curwin->w_cursor;
2427 	    curwin->w_cursor.lnum = 0;
2428 	    if (!do_search(NULL, '/', qf_ptr->qf_pattern, (long)1,
2429 						      SEARCH_KEEP, NULL, NULL))
2430 		curwin->w_cursor = save_cursor;
2431 	}
2432 
2433 #ifdef FEAT_FOLDING
2434 	if ((fdo_flags & FDO_QUICKFIX) && old_KeyTyped)
2435 	    foldOpenCursor();
2436 #endif
2437 	if (print_message)
2438 	{
2439 	    /* Update the screen before showing the message, unless the screen
2440 	     * scrolled up. */
2441 	    if (!msg_scrolled)
2442 		update_topline_redraw();
2443 	    sprintf((char *)IObuff, _("(%d of %d)%s%s: "), qf_index,
2444 		    qi->qf_lists[qi->qf_curlist].qf_count,
2445 		    qf_ptr->qf_cleared ? _(" (line deleted)") : "",
2446 		    (char *)qf_types(qf_ptr->qf_type, qf_ptr->qf_nr));
2447 	    /* Add the message, skipping leading whitespace and newlines. */
2448 	    len = (int)STRLEN(IObuff);
2449 	    qf_fmt_text(skipwhite(qf_ptr->qf_text), IObuff + len, IOSIZE - len);
2450 
2451 	    /* Output the message.  Overwrite to avoid scrolling when the 'O'
2452 	     * flag is present in 'shortmess'; But when not jumping, print the
2453 	     * whole message. */
2454 	    i = msg_scroll;
2455 	    if (curbuf == old_curbuf && curwin->w_cursor.lnum == old_lnum)
2456 		msg_scroll = TRUE;
2457 	    else if (!msg_scrolled && shortmess(SHM_OVERALL))
2458 		msg_scroll = FALSE;
2459 	    msg_attr_keep(IObuff, 0, TRUE);
2460 	    msg_scroll = i;
2461 	}
2462     }
2463     else
2464     {
2465 #ifdef FEAT_WINDOWS
2466 	if (opened_window)
2467 	    win_close(curwin, TRUE);    /* Close opened window */
2468 #endif
2469 	if (qf_ptr != NULL && qf_ptr->qf_fnum != 0)
2470 	{
2471 	    /*
2472 	     * Couldn't open file, so put index back where it was.  This could
2473 	     * happen if the file was readonly and we changed something.
2474 	     */
2475 #ifdef FEAT_WINDOWS
2476 failed:
2477 #endif
2478 	    qf_ptr = old_qf_ptr;
2479 	    qf_index = old_qf_index;
2480 	}
2481     }
2482 theend:
2483     if (qi != NULL)
2484     {
2485 	qi->qf_lists[qi->qf_curlist].qf_ptr = qf_ptr;
2486 	qi->qf_lists[qi->qf_curlist].qf_index = qf_index;
2487     }
2488 #ifdef FEAT_WINDOWS
2489     if (p_swb != old_swb && opened_window)
2490     {
2491 	/* Restore old 'switchbuf' value, but not when an autocommand or
2492 	 * modeline has changed the value. */
2493 	if (p_swb == empty_option)
2494 	{
2495 	    p_swb = old_swb;
2496 	    swb_flags = old_swb_flags;
2497 	}
2498 	else
2499 	    free_string_option(old_swb);
2500     }
2501 #endif
2502 }
2503 
2504 /*
2505  * ":clist": list all errors
2506  * ":llist": list all locations
2507  */
2508     void
2509 qf_list(exarg_T *eap)
2510 {
2511     buf_T	*buf;
2512     char_u	*fname;
2513     qfline_T	*qfp;
2514     int		i;
2515     int		idx1 = 1;
2516     int		idx2 = -1;
2517     char_u	*arg = eap->arg;
2518     int		plus = FALSE;
2519     int		all = eap->forceit;	/* if not :cl!, only show
2520 						   recognised errors */
2521     qf_info_T	*qi = &ql_info;
2522 
2523     if (eap->cmdidx == CMD_llist)
2524     {
2525 	qi = GET_LOC_LIST(curwin);
2526 	if (qi == NULL)
2527 	{
2528 	    EMSG(_(e_loclist));
2529 	    return;
2530 	}
2531     }
2532 
2533     if (qi->qf_curlist >= qi->qf_listcount
2534 	|| qi->qf_lists[qi->qf_curlist].qf_count == 0)
2535     {
2536 	EMSG(_(e_quickfix));
2537 	return;
2538     }
2539     if (*arg == '+')
2540     {
2541 	++arg;
2542 	plus = TRUE;
2543     }
2544     if (!get_list_range(&arg, &idx1, &idx2) || *arg != NUL)
2545     {
2546 	EMSG(_(e_trailing));
2547 	return;
2548     }
2549     if (plus)
2550     {
2551 	i = qi->qf_lists[qi->qf_curlist].qf_index;
2552 	idx2 = i + idx1;
2553 	idx1 = i;
2554     }
2555     else
2556     {
2557 	i = qi->qf_lists[qi->qf_curlist].qf_count;
2558 	if (idx1 < 0)
2559 	    idx1 = (-idx1 > i) ? 0 : idx1 + i + 1;
2560 	if (idx2 < 0)
2561 	    idx2 = (-idx2 > i) ? 0 : idx2 + i + 1;
2562     }
2563 
2564     if (qi->qf_lists[qi->qf_curlist].qf_nonevalid)
2565 	all = TRUE;
2566     qfp = qi->qf_lists[qi->qf_curlist].qf_start;
2567     for (i = 1; !got_int && i <= qi->qf_lists[qi->qf_curlist].qf_count; )
2568     {
2569 	if ((qfp->qf_valid || all) && idx1 <= i && i <= idx2)
2570 	{
2571 	    msg_putchar('\n');
2572 	    if (got_int)
2573 		break;
2574 
2575 	    fname = NULL;
2576 	    if (qfp->qf_fnum != 0
2577 			      && (buf = buflist_findnr(qfp->qf_fnum)) != NULL)
2578 	    {
2579 		fname = buf->b_fname;
2580 		if (qfp->qf_type == 1)	/* :helpgrep */
2581 		    fname = gettail(fname);
2582 	    }
2583 	    if (fname == NULL)
2584 		sprintf((char *)IObuff, "%2d", i);
2585 	    else
2586 		vim_snprintf((char *)IObuff, IOSIZE, "%2d %s",
2587 							    i, (char *)fname);
2588 	    msg_outtrans_attr(IObuff, i == qi->qf_lists[qi->qf_curlist].qf_index
2589 					   ? HL_ATTR(HLF_QFL) : HL_ATTR(HLF_D));
2590 	    if (qfp->qf_lnum == 0)
2591 		IObuff[0] = NUL;
2592 	    else if (qfp->qf_col == 0)
2593 		sprintf((char *)IObuff, ":%ld", qfp->qf_lnum);
2594 	    else
2595 		sprintf((char *)IObuff, ":%ld col %d",
2596 						   qfp->qf_lnum, qfp->qf_col);
2597 	    sprintf((char *)IObuff + STRLEN(IObuff), "%s:",
2598 				  (char *)qf_types(qfp->qf_type, qfp->qf_nr));
2599 	    msg_puts_attr(IObuff, HL_ATTR(HLF_N));
2600 	    if (qfp->qf_pattern != NULL)
2601 	    {
2602 		qf_fmt_text(qfp->qf_pattern, IObuff, IOSIZE);
2603 		STRCAT(IObuff, ":");
2604 		msg_puts(IObuff);
2605 	    }
2606 	    msg_puts((char_u *)" ");
2607 
2608 	    /* Remove newlines and leading whitespace from the text.  For an
2609 	     * unrecognized line keep the indent, the compiler may mark a word
2610 	     * with ^^^^. */
2611 	    qf_fmt_text((fname != NULL || qfp->qf_lnum != 0)
2612 				     ? skipwhite(qfp->qf_text) : qfp->qf_text,
2613 							      IObuff, IOSIZE);
2614 	    msg_prt_line(IObuff, FALSE);
2615 	    out_flush();		/* show one line at a time */
2616 	}
2617 
2618 	qfp = qfp->qf_next;
2619 	if (qfp == NULL)
2620 	    break;
2621 	++i;
2622 	ui_breakcheck();
2623     }
2624 }
2625 
2626 /*
2627  * Remove newlines and leading whitespace from an error message.
2628  * Put the result in "buf[bufsize]".
2629  */
2630     static void
2631 qf_fmt_text(char_u *text, char_u *buf, int bufsize)
2632 {
2633     int		i;
2634     char_u	*p = text;
2635 
2636     for (i = 0; *p != NUL && i < bufsize - 1; ++i)
2637     {
2638 	if (*p == '\n')
2639 	{
2640 	    buf[i] = ' ';
2641 	    while (*++p != NUL)
2642 		if (!VIM_ISWHITE(*p) && *p != '\n')
2643 		    break;
2644 	}
2645 	else
2646 	    buf[i] = *p++;
2647     }
2648     buf[i] = NUL;
2649 }
2650 
2651     static void
2652 qf_msg(qf_info_T *qi, int which, char *lead)
2653 {
2654     char   *title = (char *)qi->qf_lists[which].qf_title;
2655     int    count = qi->qf_lists[which].qf_count;
2656     char_u buf[IOSIZE];
2657 
2658     vim_snprintf((char *)buf, IOSIZE, _("%serror list %d of %d; %d errors "),
2659 	    lead,
2660 	    which + 1,
2661 	    qi->qf_listcount,
2662 	    count);
2663 
2664     if (title != NULL)
2665     {
2666 	size_t	len = STRLEN(buf);
2667 
2668 	if (len < 34)
2669 	{
2670 	    vim_memset(buf + len, ' ', 34 - len);
2671 	    buf[34] = NUL;
2672 	}
2673 	vim_strcat(buf, (char_u *)title, IOSIZE);
2674     }
2675     trunc_string(buf, buf, Columns - 1, IOSIZE);
2676     msg(buf);
2677 }
2678 
2679 /*
2680  * ":colder [count]": Up in the quickfix stack.
2681  * ":cnewer [count]": Down in the quickfix stack.
2682  * ":lolder [count]": Up in the location list stack.
2683  * ":lnewer [count]": Down in the location list stack.
2684  */
2685     void
2686 qf_age(exarg_T *eap)
2687 {
2688     qf_info_T	*qi = &ql_info;
2689     int		count;
2690 
2691     if (eap->cmdidx == CMD_lolder || eap->cmdidx == CMD_lnewer)
2692     {
2693 	qi = GET_LOC_LIST(curwin);
2694 	if (qi == NULL)
2695 	{
2696 	    EMSG(_(e_loclist));
2697 	    return;
2698 	}
2699     }
2700 
2701     if (eap->addr_count != 0)
2702 	count = eap->line2;
2703     else
2704 	count = 1;
2705     while (count--)
2706     {
2707 	if (eap->cmdidx == CMD_colder || eap->cmdidx == CMD_lolder)
2708 	{
2709 	    if (qi->qf_curlist == 0)
2710 	    {
2711 		EMSG(_("E380: At bottom of quickfix stack"));
2712 		break;
2713 	    }
2714 	    --qi->qf_curlist;
2715 	}
2716 	else
2717 	{
2718 	    if (qi->qf_curlist >= qi->qf_listcount - 1)
2719 	    {
2720 		EMSG(_("E381: At top of quickfix stack"));
2721 		break;
2722 	    }
2723 	    ++qi->qf_curlist;
2724 	}
2725     }
2726     qf_msg(qi, qi->qf_curlist, "");
2727 #ifdef FEAT_WINDOWS
2728     qf_update_buffer(qi, NULL);
2729 #endif
2730 }
2731 
2732     void
2733 qf_history(exarg_T *eap)
2734 {
2735     qf_info_T	*qi = &ql_info;
2736     int		i;
2737 
2738     if (eap->cmdidx == CMD_lhistory)
2739 	qi = GET_LOC_LIST(curwin);
2740     if (qi == NULL || (qi->qf_listcount == 0
2741 				&& qi->qf_lists[qi->qf_curlist].qf_count == 0))
2742 	MSG(_("No entries"));
2743     else
2744 	for (i = 0; i < qi->qf_listcount; ++i)
2745 	    qf_msg(qi, i, i == qi->qf_curlist ? "> " : "  ");
2746 }
2747 
2748 /*
2749  * Free all the entries in the error list "idx". Note that other information
2750  * associated with the list like context and title are not freed.
2751  */
2752     static void
2753 qf_free_items(qf_info_T *qi, int idx)
2754 {
2755     qfline_T	*qfp;
2756     qfline_T	*qfpnext;
2757     int		stop = FALSE;
2758     qf_list_T	*qfl = &qi->qf_lists[idx];
2759 
2760     while (qfl->qf_count && qfl->qf_start != NULL)
2761     {
2762 	qfp = qfl->qf_start;
2763 	qfpnext = qfp->qf_next;
2764 	if (qfl->qf_title != NULL && !stop)
2765 	{
2766 	    vim_free(qfp->qf_text);
2767 	    stop = (qfp == qfpnext);
2768 	    vim_free(qfp->qf_pattern);
2769 	    vim_free(qfp);
2770 	    if (stop)
2771 		/* Somehow qf_count may have an incorrect value, set it to 1
2772 		 * to avoid crashing when it's wrong.
2773 		 * TODO: Avoid qf_count being incorrect. */
2774 		qfl->qf_count = 1;
2775 	}
2776 	qfl->qf_start = qfpnext;
2777 	--qfl->qf_count;
2778     }
2779 
2780     qfl->qf_index = 0;
2781     qfl->qf_start = NULL;
2782     qfl->qf_last = NULL;
2783     qfl->qf_ptr = NULL;
2784     qfl->qf_nonevalid = TRUE;
2785 
2786     qf_clean_dir_stack(&qfl->qf_dir_stack);
2787     qfl->qf_directory = NULL;
2788     qf_clean_dir_stack(&qfl->qf_file_stack);
2789     qfl->qf_currfile = NULL;
2790     qfl->qf_multiline = FALSE;
2791     qfl->qf_multiignore = FALSE;
2792     qfl->qf_multiscan = FALSE;
2793 }
2794 
2795 /*
2796  * Free error list "idx". Frees all the entries in the quickfix list,
2797  * associated context information and the title.
2798  */
2799     static void
2800 qf_free(qf_info_T *qi, int idx)
2801 {
2802     qf_list_T	*qfl = &qi->qf_lists[idx];
2803 
2804     qf_free_items(qi, idx);
2805 
2806     vim_free(qfl->qf_title);
2807     qfl->qf_title = NULL;
2808     free_tv(qfl->qf_ctx);
2809     qfl->qf_ctx = NULL;
2810 }
2811 
2812 /*
2813  * qf_mark_adjust: adjust marks
2814  */
2815    void
2816 qf_mark_adjust(
2817     win_T	*wp,
2818     linenr_T	line1,
2819     linenr_T	line2,
2820     long	amount,
2821     long	amount_after)
2822 {
2823     int		i;
2824     qfline_T	*qfp;
2825     int		idx;
2826     qf_info_T	*qi = &ql_info;
2827     int		found_one = FALSE;
2828     int		buf_has_flag = wp == NULL ? BUF_HAS_QF_ENTRY : BUF_HAS_LL_ENTRY;
2829 
2830     if (!(curbuf->b_has_qf_entry & buf_has_flag))
2831 	return;
2832     if (wp != NULL)
2833     {
2834 	if (wp->w_llist == NULL)
2835 	    return;
2836 	qi = wp->w_llist;
2837     }
2838 
2839     for (idx = 0; idx < qi->qf_listcount; ++idx)
2840 	if (qi->qf_lists[idx].qf_count)
2841 	    for (i = 0, qfp = qi->qf_lists[idx].qf_start;
2842 		       i < qi->qf_lists[idx].qf_count && qfp != NULL;
2843 		       ++i, qfp = qfp->qf_next)
2844 		if (qfp->qf_fnum == curbuf->b_fnum)
2845 		{
2846 		    found_one = TRUE;
2847 		    if (qfp->qf_lnum >= line1 && qfp->qf_lnum <= line2)
2848 		    {
2849 			if (amount == MAXLNUM)
2850 			    qfp->qf_cleared = TRUE;
2851 			else
2852 			    qfp->qf_lnum += amount;
2853 		    }
2854 		    else if (amount_after && qfp->qf_lnum > line2)
2855 			qfp->qf_lnum += amount_after;
2856 		}
2857 
2858     if (!found_one)
2859 	curbuf->b_has_qf_entry &= ~buf_has_flag;
2860 }
2861 
2862 /*
2863  * Make a nice message out of the error character and the error number:
2864  *  char    number	message
2865  *  e or E    0		" error"
2866  *  w or W    0		" warning"
2867  *  i or I    0		" info"
2868  *  0	      0		""
2869  *  other     0		" c"
2870  *  e or E    n		" error n"
2871  *  w or W    n		" warning n"
2872  *  i or I    n		" info n"
2873  *  0	      n		" error n"
2874  *  other     n		" c n"
2875  *  1	      x		""	:helpgrep
2876  */
2877     static char_u *
2878 qf_types(int c, int nr)
2879 {
2880     static char_u	buf[20];
2881     static char_u	cc[3];
2882     char_u		*p;
2883 
2884     if (c == 'W' || c == 'w')
2885 	p = (char_u *)" warning";
2886     else if (c == 'I' || c == 'i')
2887 	p = (char_u *)" info";
2888     else if (c == 'E' || c == 'e' || (c == 0 && nr > 0))
2889 	p = (char_u *)" error";
2890     else if (c == 0 || c == 1)
2891 	p = (char_u *)"";
2892     else
2893     {
2894 	cc[0] = ' ';
2895 	cc[1] = c;
2896 	cc[2] = NUL;
2897 	p = cc;
2898     }
2899 
2900     if (nr <= 0)
2901 	return p;
2902 
2903     sprintf((char *)buf, "%s %3d", (char *)p, nr);
2904     return buf;
2905 }
2906 
2907 #if defined(FEAT_WINDOWS) || defined(PROTO)
2908 /*
2909  * ":cwindow": open the quickfix window if we have errors to display,
2910  *	       close it if not.
2911  * ":lwindow": open the location list window if we have locations to display,
2912  *	       close it if not.
2913  */
2914     void
2915 ex_cwindow(exarg_T *eap)
2916 {
2917     qf_info_T	*qi = &ql_info;
2918     win_T	*win;
2919 
2920     if (eap->cmdidx == CMD_lwindow)
2921     {
2922 	qi = GET_LOC_LIST(curwin);
2923 	if (qi == NULL)
2924 	    return;
2925     }
2926 
2927     /* Look for an existing quickfix window.  */
2928     win = qf_find_win(qi);
2929 
2930     /*
2931      * If a quickfix window is open but we have no errors to display,
2932      * close the window.  If a quickfix window is not open, then open
2933      * it if we have errors; otherwise, leave it closed.
2934      */
2935     if (qi->qf_lists[qi->qf_curlist].qf_nonevalid
2936 	    || qi->qf_lists[qi->qf_curlist].qf_count == 0
2937 	    || qi->qf_curlist >= qi->qf_listcount)
2938     {
2939 	if (win != NULL)
2940 	    ex_cclose(eap);
2941     }
2942     else if (win == NULL)
2943 	ex_copen(eap);
2944 }
2945 
2946 /*
2947  * ":cclose": close the window showing the list of errors.
2948  * ":lclose": close the window showing the location list
2949  */
2950     void
2951 ex_cclose(exarg_T *eap)
2952 {
2953     win_T	*win = NULL;
2954     qf_info_T	*qi = &ql_info;
2955 
2956     if (eap->cmdidx == CMD_lclose || eap->cmdidx == CMD_lwindow)
2957     {
2958 	qi = GET_LOC_LIST(curwin);
2959 	if (qi == NULL)
2960 	    return;
2961     }
2962 
2963     /* Find existing quickfix window and close it. */
2964     win = qf_find_win(qi);
2965     if (win != NULL)
2966 	win_close(win, FALSE);
2967 }
2968 
2969 /*
2970  * ":copen": open a window that shows the list of errors.
2971  * ":lopen": open a window that shows the location list.
2972  */
2973     void
2974 ex_copen(exarg_T *eap)
2975 {
2976     qf_info_T	*qi = &ql_info;
2977     int		height;
2978     win_T	*win;
2979     tabpage_T	*prevtab = curtab;
2980     buf_T	*qf_buf;
2981     win_T	*oldwin = curwin;
2982 
2983     if (eap->cmdidx == CMD_lopen || eap->cmdidx == CMD_lwindow)
2984     {
2985 	qi = GET_LOC_LIST(curwin);
2986 	if (qi == NULL)
2987 	{
2988 	    EMSG(_(e_loclist));
2989 	    return;
2990 	}
2991     }
2992 
2993     if (eap->addr_count != 0)
2994 	height = eap->line2;
2995     else
2996 	height = QF_WINHEIGHT;
2997 
2998     reset_VIsual_and_resel();			/* stop Visual mode */
2999 #ifdef FEAT_GUI
3000     need_mouse_correct = TRUE;
3001 #endif
3002 
3003     /*
3004      * Find existing quickfix window, or open a new one.
3005      */
3006     win = qf_find_win(qi);
3007 
3008     if (win != NULL && cmdmod.tab == 0)
3009     {
3010 	win_goto(win);
3011 	if (eap->addr_count != 0)
3012 	{
3013 	    if (cmdmod.split & WSP_VERT)
3014 	    {
3015 		if (height != W_WIDTH(win))
3016 		    win_setwidth(height);
3017 	    }
3018 	    else if (height != win->w_height)
3019 		win_setheight(height);
3020 	}
3021     }
3022     else
3023     {
3024 	qf_buf = qf_find_buf(qi);
3025 
3026 	/* The current window becomes the previous window afterwards. */
3027 	win = curwin;
3028 
3029 	if ((eap->cmdidx == CMD_copen || eap->cmdidx == CMD_cwindow)
3030 		&& cmdmod.split == 0)
3031 	    /* Create the new window at the very bottom, except when
3032 	     * :belowright or :aboveleft is used. */
3033 	    win_goto(lastwin);
3034 	if (win_split(height, WSP_BELOW | WSP_NEWLOC) == FAIL)
3035 	    return;		/* not enough room for window */
3036 	RESET_BINDING(curwin);
3037 
3038 	if (eap->cmdidx == CMD_lopen || eap->cmdidx == CMD_lwindow)
3039 	{
3040 	    /*
3041 	     * For the location list window, create a reference to the
3042 	     * location list from the window 'win'.
3043 	     */
3044 	    curwin->w_llist_ref = win->w_llist;
3045 	    win->w_llist->qf_refcount++;
3046 	}
3047 
3048 	if (oldwin != curwin)
3049 	    oldwin = NULL;  /* don't store info when in another window */
3050 	if (qf_buf != NULL)
3051 	    /* Use the existing quickfix buffer */
3052 	    (void)do_ecmd(qf_buf->b_fnum, NULL, NULL, NULL, ECMD_ONE,
3053 					     ECMD_HIDE + ECMD_OLDBUF, oldwin);
3054 	else
3055 	{
3056 	    /* Create a new quickfix buffer */
3057 	    (void)do_ecmd(0, NULL, NULL, NULL, ECMD_ONE, ECMD_HIDE, oldwin);
3058 	    /* switch off 'swapfile' */
3059 	    set_option_value((char_u *)"swf", 0L, NULL, OPT_LOCAL);
3060 	    set_option_value((char_u *)"bt", 0L, (char_u *)"quickfix",
3061 								   OPT_LOCAL);
3062 	    set_option_value((char_u *)"bh", 0L, (char_u *)"wipe", OPT_LOCAL);
3063 	    RESET_BINDING(curwin);
3064 #ifdef FEAT_DIFF
3065 	    curwin->w_p_diff = FALSE;
3066 #endif
3067 #ifdef FEAT_FOLDING
3068 	    set_option_value((char_u *)"fdm", 0L, (char_u *)"manual",
3069 								   OPT_LOCAL);
3070 #endif
3071 	}
3072 
3073 	/* Only set the height when still in the same tab page and there is no
3074 	 * window to the side. */
3075 	if (curtab == prevtab && curwin->w_width == Columns)
3076 	    win_setheight(height);
3077 	curwin->w_p_wfh = TRUE;	    /* set 'winfixheight' */
3078 	if (win_valid(win))
3079 	    prevwin = win;
3080     }
3081 
3082     qf_set_title_var(qi);
3083 
3084     /*
3085      * Fill the buffer with the quickfix list.
3086      */
3087     qf_fill_buffer(qi, curbuf, NULL);
3088 
3089     curwin->w_cursor.lnum = qi->qf_lists[qi->qf_curlist].qf_index;
3090     curwin->w_cursor.col = 0;
3091     check_cursor();
3092     update_topline();		/* scroll to show the line */
3093 }
3094 
3095 /*
3096  * Move the cursor in the quickfix window to "lnum".
3097  */
3098     static void
3099 qf_win_goto(win_T *win, linenr_T lnum)
3100 {
3101     win_T	*old_curwin = curwin;
3102 
3103     curwin = win;
3104     curbuf = win->w_buffer;
3105     curwin->w_cursor.lnum = lnum;
3106     curwin->w_cursor.col = 0;
3107 #ifdef FEAT_VIRTUALEDIT
3108     curwin->w_cursor.coladd = 0;
3109 #endif
3110     curwin->w_curswant = 0;
3111     update_topline();		/* scroll to show the line */
3112     redraw_later(VALID);
3113     curwin->w_redr_status = TRUE;	/* update ruler */
3114     curwin = old_curwin;
3115     curbuf = curwin->w_buffer;
3116 }
3117 
3118 /*
3119  * :cbottom/:lbottom commands.
3120  */
3121     void
3122 ex_cbottom(exarg_T *eap UNUSED)
3123 {
3124     qf_info_T	*qi = &ql_info;
3125     win_T	*win;
3126 
3127     if (eap->cmdidx == CMD_lbottom)
3128     {
3129 	qi = GET_LOC_LIST(curwin);
3130 	if (qi == NULL)
3131 	{
3132 	    EMSG(_(e_loclist));
3133 	    return;
3134 	}
3135     }
3136 
3137     win = qf_find_win(qi);
3138     if (win != NULL && win->w_cursor.lnum != win->w_buffer->b_ml.ml_line_count)
3139 	qf_win_goto(win, win->w_buffer->b_ml.ml_line_count);
3140 }
3141 
3142 /*
3143  * Return the number of the current entry (line number in the quickfix
3144  * window).
3145  */
3146      linenr_T
3147 qf_current_entry(win_T *wp)
3148 {
3149     qf_info_T	*qi = &ql_info;
3150 
3151     if (IS_LL_WINDOW(wp))
3152 	/* In the location list window, use the referenced location list */
3153 	qi = wp->w_llist_ref;
3154 
3155     return qi->qf_lists[qi->qf_curlist].qf_index;
3156 }
3157 
3158 /*
3159  * Update the cursor position in the quickfix window to the current error.
3160  * Return TRUE if there is a quickfix window.
3161  */
3162     static int
3163 qf_win_pos_update(
3164     qf_info_T	*qi,
3165     int		old_qf_index)	/* previous qf_index or zero */
3166 {
3167     win_T	*win;
3168     int		qf_index = qi->qf_lists[qi->qf_curlist].qf_index;
3169 
3170     /*
3171      * Put the cursor on the current error in the quickfix window, so that
3172      * it's viewable.
3173      */
3174     win = qf_find_win(qi);
3175     if (win != NULL
3176 	    && qf_index <= win->w_buffer->b_ml.ml_line_count
3177 	    && old_qf_index != qf_index)
3178     {
3179 	if (qf_index > old_qf_index)
3180 	{
3181 	    win->w_redraw_top = old_qf_index;
3182 	    win->w_redraw_bot = qf_index;
3183 	}
3184 	else
3185 	{
3186 	    win->w_redraw_top = qf_index;
3187 	    win->w_redraw_bot = old_qf_index;
3188 	}
3189 	qf_win_goto(win, qf_index);
3190     }
3191     return win != NULL;
3192 }
3193 
3194 /*
3195  * Check whether the given window is displaying the specified quickfix/location
3196  * list buffer
3197  */
3198     static int
3199 is_qf_win(win_T *win, qf_info_T *qi)
3200 {
3201     /*
3202      * A window displaying the quickfix buffer will have the w_llist_ref field
3203      * set to NULL.
3204      * A window displaying a location list buffer will have the w_llist_ref
3205      * pointing to the location list.
3206      */
3207     if (bt_quickfix(win->w_buffer))
3208 	if ((qi == &ql_info && win->w_llist_ref == NULL)
3209 		|| (qi != &ql_info && win->w_llist_ref == qi))
3210 	    return TRUE;
3211 
3212     return FALSE;
3213 }
3214 
3215 /*
3216  * Find a window displaying the quickfix/location list 'qi'
3217  * Searches in only the windows opened in the current tab.
3218  */
3219     static win_T *
3220 qf_find_win(qf_info_T *qi)
3221 {
3222     win_T	*win;
3223 
3224     FOR_ALL_WINDOWS(win)
3225 	if (is_qf_win(win, qi))
3226 	    break;
3227 
3228     return win;
3229 }
3230 
3231 /*
3232  * Find a quickfix buffer.
3233  * Searches in windows opened in all the tabs.
3234  */
3235     static buf_T *
3236 qf_find_buf(qf_info_T *qi)
3237 {
3238     tabpage_T	*tp;
3239     win_T	*win;
3240 
3241     FOR_ALL_TAB_WINDOWS(tp, win)
3242 	if (is_qf_win(win, qi))
3243 	    return win->w_buffer;
3244 
3245     return NULL;
3246 }
3247 
3248 /*
3249  * Update the w:quickfix_title variable in the quickfix/location list window
3250  */
3251     static void
3252 qf_update_win_titlevar(qf_info_T *qi)
3253 {
3254     win_T	*win;
3255     win_T	*curwin_save;
3256 
3257     if ((win = qf_find_win(qi)) != NULL)
3258     {
3259 	curwin_save = curwin;
3260 	curwin = win;
3261 	qf_set_title_var(qi);
3262 	curwin = curwin_save;
3263     }
3264 }
3265 
3266 /*
3267  * Find the quickfix buffer.  If it exists, update the contents.
3268  */
3269     static void
3270 qf_update_buffer(qf_info_T *qi, qfline_T *old_last)
3271 {
3272     buf_T	*buf;
3273     win_T	*win;
3274     aco_save_T	aco;
3275 
3276     /* Check if a buffer for the quickfix list exists.  Update it. */
3277     buf = qf_find_buf(qi);
3278     if (buf != NULL)
3279     {
3280 	linenr_T	old_line_count = buf->b_ml.ml_line_count;
3281 
3282 	if (old_last == NULL)
3283 	    /* set curwin/curbuf to buf and save a few things */
3284 	    aucmd_prepbuf(&aco, buf);
3285 
3286 	qf_update_win_titlevar(qi);
3287 
3288 	qf_fill_buffer(qi, buf, old_last);
3289 	++CHANGEDTICK(buf);
3290 
3291 	if (old_last == NULL)
3292 	{
3293 	    (void)qf_win_pos_update(qi, 0);
3294 
3295 	    /* restore curwin/curbuf and a few other things */
3296 	    aucmd_restbuf(&aco);
3297 	}
3298 
3299 	/* Only redraw when added lines are visible.  This avoids flickering
3300 	 * when the added lines are not visible. */
3301 	if ((win = qf_find_win(qi)) != NULL && old_line_count < win->w_botline)
3302 	    redraw_buf_later(buf, NOT_VALID);
3303     }
3304 }
3305 
3306 /*
3307  * Set "w:quickfix_title" if "qi" has a title.
3308  */
3309     static void
3310 qf_set_title_var(qf_info_T *qi)
3311 {
3312     if (qi->qf_lists[qi->qf_curlist].qf_title != NULL)
3313 	set_internal_string_var((char_u *)"w:quickfix_title",
3314 				    qi->qf_lists[qi->qf_curlist].qf_title);
3315 }
3316 
3317 /*
3318  * Fill current buffer with quickfix errors, replacing any previous contents.
3319  * curbuf must be the quickfix buffer!
3320  * If "old_last" is not NULL append the items after this one.
3321  * When "old_last" is NULL then "buf" must equal "curbuf"!  Because
3322  * ml_delete() is used and autocommands will be triggered.
3323  */
3324     static void
3325 qf_fill_buffer(qf_info_T *qi, buf_T *buf, qfline_T *old_last)
3326 {
3327     linenr_T	lnum;
3328     qfline_T	*qfp;
3329     buf_T	*errbuf;
3330     int		len;
3331     int		old_KeyTyped = KeyTyped;
3332 
3333     if (old_last == NULL)
3334     {
3335 	if (buf != curbuf)
3336 	{
3337 	    internal_error("qf_fill_buffer()");
3338 	    return;
3339 	}
3340 
3341 	/* delete all existing lines */
3342 	while ((curbuf->b_ml.ml_flags & ML_EMPTY) == 0)
3343 	    (void)ml_delete((linenr_T)1, FALSE);
3344     }
3345 
3346     /* Check if there is anything to display */
3347     if (qi->qf_curlist < qi->qf_listcount)
3348     {
3349 	/* Add one line for each error */
3350 	if (old_last == NULL)
3351 	{
3352 	    qfp = qi->qf_lists[qi->qf_curlist].qf_start;
3353 	    lnum = 0;
3354 	}
3355 	else
3356 	{
3357 	    qfp = old_last->qf_next;
3358 	    lnum = buf->b_ml.ml_line_count;
3359 	}
3360 	while (lnum < qi->qf_lists[qi->qf_curlist].qf_count)
3361 	{
3362 	    if (qfp->qf_fnum != 0
3363 		    && (errbuf = buflist_findnr(qfp->qf_fnum)) != NULL
3364 		    && errbuf->b_fname != NULL)
3365 	    {
3366 		if (qfp->qf_type == 1)	/* :helpgrep */
3367 		    STRCPY(IObuff, gettail(errbuf->b_fname));
3368 		else
3369 		    STRCPY(IObuff, errbuf->b_fname);
3370 		len = (int)STRLEN(IObuff);
3371 	    }
3372 	    else
3373 		len = 0;
3374 	    IObuff[len++] = '|';
3375 
3376 	    if (qfp->qf_lnum > 0)
3377 	    {
3378 		sprintf((char *)IObuff + len, "%ld", qfp->qf_lnum);
3379 		len += (int)STRLEN(IObuff + len);
3380 
3381 		if (qfp->qf_col > 0)
3382 		{
3383 		    sprintf((char *)IObuff + len, " col %d", qfp->qf_col);
3384 		    len += (int)STRLEN(IObuff + len);
3385 		}
3386 
3387 		sprintf((char *)IObuff + len, "%s",
3388 				  (char *)qf_types(qfp->qf_type, qfp->qf_nr));
3389 		len += (int)STRLEN(IObuff + len);
3390 	    }
3391 	    else if (qfp->qf_pattern != NULL)
3392 	    {
3393 		qf_fmt_text(qfp->qf_pattern, IObuff + len, IOSIZE - len);
3394 		len += (int)STRLEN(IObuff + len);
3395 	    }
3396 	    IObuff[len++] = '|';
3397 	    IObuff[len++] = ' ';
3398 
3399 	    /* Remove newlines and leading whitespace from the text.
3400 	     * For an unrecognized line keep the indent, the compiler may
3401 	     * mark a word with ^^^^. */
3402 	    qf_fmt_text(len > 3 ? skipwhite(qfp->qf_text) : qfp->qf_text,
3403 						  IObuff + len, IOSIZE - len);
3404 
3405 	    if (ml_append_buf(buf, lnum, IObuff,
3406 				  (colnr_T)STRLEN(IObuff) + 1, FALSE) == FAIL)
3407 		break;
3408 	    ++lnum;
3409 	    qfp = qfp->qf_next;
3410 	    if (qfp == NULL)
3411 		break;
3412 	}
3413 
3414 	if (old_last == NULL)
3415 	    /* Delete the empty line which is now at the end */
3416 	    (void)ml_delete(lnum + 1, FALSE);
3417     }
3418 
3419     /* correct cursor position */
3420     check_lnums(TRUE);
3421 
3422     if (old_last == NULL)
3423     {
3424 	/* Set the 'filetype' to "qf" each time after filling the buffer.
3425 	 * This resembles reading a file into a buffer, it's more logical when
3426 	 * using autocommands. */
3427 #ifdef FEAT_AUTOCMD
3428 	++curbuf_lock;
3429 #endif
3430 	set_option_value((char_u *)"ft", 0L, (char_u *)"qf", OPT_LOCAL);
3431 	curbuf->b_p_ma = FALSE;
3432 
3433 #ifdef FEAT_AUTOCMD
3434 	keep_filetype = TRUE;		/* don't detect 'filetype' */
3435 	apply_autocmds(EVENT_BUFREADPOST, (char_u *)"quickfix", NULL,
3436 							       FALSE, curbuf);
3437 	apply_autocmds(EVENT_BUFWINENTER, (char_u *)"quickfix", NULL,
3438 							       FALSE, curbuf);
3439 	keep_filetype = FALSE;
3440 	--curbuf_lock;
3441 #endif
3442 	/* make sure it will be redrawn */
3443 	redraw_curbuf_later(NOT_VALID);
3444     }
3445 
3446     /* Restore KeyTyped, setting 'filetype' may reset it. */
3447     KeyTyped = old_KeyTyped;
3448 }
3449 
3450 #endif /* FEAT_WINDOWS */
3451 
3452 /*
3453  * Return TRUE when using ":vimgrep" for ":grep".
3454  */
3455     int
3456 grep_internal(cmdidx_T cmdidx)
3457 {
3458     return ((cmdidx == CMD_grep
3459 		|| cmdidx == CMD_lgrep
3460 		|| cmdidx == CMD_grepadd
3461 		|| cmdidx == CMD_lgrepadd)
3462 	    && STRCMP("internal",
3463 			*curbuf->b_p_gp == NUL ? p_gp : curbuf->b_p_gp) == 0);
3464 }
3465 
3466 /*
3467  * Used for ":make", ":lmake", ":grep", ":lgrep", ":grepadd", and ":lgrepadd"
3468  */
3469     void
3470 ex_make(exarg_T *eap)
3471 {
3472     char_u	*fname;
3473     char_u	*cmd;
3474     char_u	*enc = NULL;
3475     unsigned	len;
3476     win_T	*wp = NULL;
3477     qf_info_T	*qi = &ql_info;
3478     int		res;
3479 #ifdef FEAT_AUTOCMD
3480     char_u	*au_name = NULL;
3481 
3482     /* Redirect ":grep" to ":vimgrep" if 'grepprg' is "internal". */
3483     if (grep_internal(eap->cmdidx))
3484     {
3485 	ex_vimgrep(eap);
3486 	return;
3487     }
3488 
3489     switch (eap->cmdidx)
3490     {
3491 	case CMD_make:	    au_name = (char_u *)"make"; break;
3492 	case CMD_lmake:	    au_name = (char_u *)"lmake"; break;
3493 	case CMD_grep:	    au_name = (char_u *)"grep"; break;
3494 	case CMD_lgrep:	    au_name = (char_u *)"lgrep"; break;
3495 	case CMD_grepadd:   au_name = (char_u *)"grepadd"; break;
3496 	case CMD_lgrepadd:  au_name = (char_u *)"lgrepadd"; break;
3497 	default: break;
3498     }
3499     if (au_name != NULL && apply_autocmds(EVENT_QUICKFIXCMDPRE, au_name,
3500 					       curbuf->b_fname, TRUE, curbuf))
3501     {
3502 # ifdef FEAT_EVAL
3503 	if (aborting())
3504 	    return;
3505 # endif
3506     }
3507 #endif
3508 #ifdef FEAT_MBYTE
3509     enc = (*curbuf->b_p_menc != NUL) ? curbuf->b_p_menc : p_menc;
3510 #endif
3511 
3512     if (eap->cmdidx == CMD_lmake || eap->cmdidx == CMD_lgrep
3513 	|| eap->cmdidx == CMD_lgrepadd)
3514 	wp = curwin;
3515 
3516     autowrite_all();
3517     fname = get_mef_name();
3518     if (fname == NULL)
3519 	return;
3520     mch_remove(fname);	    /* in case it's not unique */
3521 
3522     /*
3523      * If 'shellpipe' empty: don't redirect to 'errorfile'.
3524      */
3525     len = (unsigned)STRLEN(p_shq) * 2 + (unsigned)STRLEN(eap->arg) + 1;
3526     if (*p_sp != NUL)
3527 	len += (unsigned)STRLEN(p_sp) + (unsigned)STRLEN(fname) + 3;
3528     cmd = alloc(len);
3529     if (cmd == NULL)
3530 	return;
3531     sprintf((char *)cmd, "%s%s%s", (char *)p_shq, (char *)eap->arg,
3532 							       (char *)p_shq);
3533     if (*p_sp != NUL)
3534 	append_redir(cmd, len, p_sp, fname);
3535     /*
3536      * Output a newline if there's something else than the :make command that
3537      * was typed (in which case the cursor is in column 0).
3538      */
3539     if (msg_col == 0)
3540 	msg_didout = FALSE;
3541     msg_start();
3542     MSG_PUTS(":!");
3543     msg_outtrans(cmd);		/* show what we are doing */
3544 
3545     /* let the shell know if we are redirecting output or not */
3546     do_shell(cmd, *p_sp != NUL ? SHELL_DOOUT : 0);
3547 
3548 #ifdef AMIGA
3549     out_flush();
3550 		/* read window status report and redraw before message */
3551     (void)char_avail();
3552 #endif
3553 
3554     res = qf_init(wp, fname, (eap->cmdidx != CMD_make
3555 			    && eap->cmdidx != CMD_lmake) ? p_gefm : p_efm,
3556 					   (eap->cmdidx != CMD_grepadd
3557 					    && eap->cmdidx != CMD_lgrepadd),
3558 					   *eap->cmdlinep, enc);
3559     if (wp != NULL)
3560 	qi = GET_LOC_LIST(wp);
3561 #ifdef FEAT_AUTOCMD
3562     if (au_name != NULL)
3563     {
3564 	apply_autocmds(EVENT_QUICKFIXCMDPOST, au_name,
3565 					       curbuf->b_fname, TRUE, curbuf);
3566 	if (qi->qf_curlist < qi->qf_listcount)
3567 	    res = qi->qf_lists[qi->qf_curlist].qf_count;
3568 	else
3569 	    res = 0;
3570     }
3571 #endif
3572     if (res > 0 && !eap->forceit)
3573 	qf_jump(qi, 0, 0, FALSE);		/* display first error */
3574 
3575     mch_remove(fname);
3576     vim_free(fname);
3577     vim_free(cmd);
3578 }
3579 
3580 /*
3581  * Return the name for the errorfile, in allocated memory.
3582  * Find a new unique name when 'makeef' contains "##".
3583  * Returns NULL for error.
3584  */
3585     static char_u *
3586 get_mef_name(void)
3587 {
3588     char_u	*p;
3589     char_u	*name;
3590     static int	start = -1;
3591     static int	off = 0;
3592 #ifdef HAVE_LSTAT
3593     stat_T	sb;
3594 #endif
3595 
3596     if (*p_mef == NUL)
3597     {
3598 	name = vim_tempname('e', FALSE);
3599 	if (name == NULL)
3600 	    EMSG(_(e_notmp));
3601 	return name;
3602     }
3603 
3604     for (p = p_mef; *p; ++p)
3605 	if (p[0] == '#' && p[1] == '#')
3606 	    break;
3607 
3608     if (*p == NUL)
3609 	return vim_strsave(p_mef);
3610 
3611     /* Keep trying until the name doesn't exist yet. */
3612     for (;;)
3613     {
3614 	if (start == -1)
3615 	    start = mch_get_pid();
3616 	else
3617 	    off += 19;
3618 
3619 	name = alloc((unsigned)STRLEN(p_mef) + 30);
3620 	if (name == NULL)
3621 	    break;
3622 	STRCPY(name, p_mef);
3623 	sprintf((char *)name + (p - p_mef), "%d%d", start, off);
3624 	STRCAT(name, p + 2);
3625 	if (mch_getperm(name) < 0
3626 #ifdef HAVE_LSTAT
3627 		    /* Don't accept a symbolic link, it's a security risk. */
3628 		    && mch_lstat((char *)name, &sb) < 0
3629 #endif
3630 		)
3631 	    break;
3632 	vim_free(name);
3633     }
3634     return name;
3635 }
3636 
3637 /*
3638  * Returns the number of valid entries in the current quickfix/location list.
3639  */
3640     int
3641 qf_get_size(exarg_T *eap)
3642 {
3643     qf_info_T	*qi = &ql_info;
3644     qfline_T	*qfp;
3645     int		i, sz = 0;
3646     int		prev_fnum = 0;
3647 
3648     if (eap->cmdidx == CMD_ldo || eap->cmdidx == CMD_lfdo)
3649     {
3650 	/* Location list */
3651 	qi = GET_LOC_LIST(curwin);
3652 	if (qi == NULL)
3653 	    return 0;
3654     }
3655 
3656     for (i = 0, qfp = qi->qf_lists[qi->qf_curlist].qf_start;
3657 	    i < qi->qf_lists[qi->qf_curlist].qf_count && qfp != NULL;
3658 	    ++i, qfp = qfp->qf_next)
3659     {
3660 	if (qfp->qf_valid)
3661 	{
3662 	    if (eap->cmdidx == CMD_cdo || eap->cmdidx == CMD_ldo)
3663 		sz++;	/* Count all valid entries */
3664 	    else if (qfp->qf_fnum > 0 && qfp->qf_fnum != prev_fnum)
3665 	    {
3666 		/* Count the number of files */
3667 		sz++;
3668 		prev_fnum = qfp->qf_fnum;
3669 	    }
3670 	}
3671     }
3672 
3673     return sz;
3674 }
3675 
3676 /*
3677  * Returns the current index of the quickfix/location list.
3678  * Returns 0 if there is an error.
3679  */
3680     int
3681 qf_get_cur_idx(exarg_T *eap)
3682 {
3683     qf_info_T	*qi = &ql_info;
3684 
3685     if (eap->cmdidx == CMD_ldo || eap->cmdidx == CMD_lfdo)
3686     {
3687 	/* Location list */
3688 	qi = GET_LOC_LIST(curwin);
3689 	if (qi == NULL)
3690 	    return 0;
3691     }
3692 
3693     return qi->qf_lists[qi->qf_curlist].qf_index;
3694 }
3695 
3696 /*
3697  * Returns the current index in the quickfix/location list (counting only valid
3698  * entries). If no valid entries are in the list, then returns 1.
3699  */
3700     int
3701 qf_get_cur_valid_idx(exarg_T *eap)
3702 {
3703     qf_info_T	*qi = &ql_info;
3704     qf_list_T	*qfl;
3705     qfline_T	*qfp;
3706     int		i, eidx = 0;
3707     int		prev_fnum = 0;
3708 
3709     if (eap->cmdidx == CMD_ldo || eap->cmdidx == CMD_lfdo)
3710     {
3711 	/* Location list */
3712 	qi = GET_LOC_LIST(curwin);
3713 	if (qi == NULL)
3714 	    return 1;
3715     }
3716 
3717     qfl = &qi->qf_lists[qi->qf_curlist];
3718     qfp = qfl->qf_start;
3719 
3720     /* check if the list has valid errors */
3721     if (qfl->qf_count <= 0 || qfl->qf_nonevalid)
3722 	return 1;
3723 
3724     for (i = 1; i <= qfl->qf_index && qfp!= NULL; i++, qfp = qfp->qf_next)
3725     {
3726 	if (qfp->qf_valid)
3727 	{
3728 	    if (eap->cmdidx == CMD_cfdo || eap->cmdidx == CMD_lfdo)
3729 	    {
3730 		if (qfp->qf_fnum > 0 && qfp->qf_fnum != prev_fnum)
3731 		{
3732 		    /* Count the number of files */
3733 		    eidx++;
3734 		    prev_fnum = qfp->qf_fnum;
3735 		}
3736 	    }
3737 	    else
3738 		eidx++;
3739 	}
3740     }
3741 
3742     return eidx ? eidx : 1;
3743 }
3744 
3745 /*
3746  * Get the 'n'th valid error entry in the quickfix or location list.
3747  * Used by :cdo, :ldo, :cfdo and :lfdo commands.
3748  * For :cdo and :ldo returns the 'n'th valid error entry.
3749  * For :cfdo and :lfdo returns the 'n'th valid file entry.
3750  */
3751     static int
3752 qf_get_nth_valid_entry(qf_info_T *qi, int n, int fdo)
3753 {
3754     qf_list_T	*qfl = &qi->qf_lists[qi->qf_curlist];
3755     qfline_T	*qfp = qfl->qf_start;
3756     int		i, eidx;
3757     int		prev_fnum = 0;
3758 
3759     /* check if the list has valid errors */
3760     if (qfl->qf_count <= 0 || qfl->qf_nonevalid)
3761 	return 1;
3762 
3763     for (i = 1, eidx = 0; i <= qfl->qf_count && qfp != NULL;
3764 	    i++, qfp = qfp->qf_next)
3765     {
3766 	if (qfp->qf_valid)
3767 	{
3768 	    if (fdo)
3769 	    {
3770 		if (qfp->qf_fnum > 0 && qfp->qf_fnum != prev_fnum)
3771 		{
3772 		    /* Count the number of files */
3773 		    eidx++;
3774 		    prev_fnum = qfp->qf_fnum;
3775 		}
3776 	    }
3777 	    else
3778 		eidx++;
3779 	}
3780 
3781 	if (eidx == n)
3782 	    break;
3783     }
3784 
3785     if (i <= qfl->qf_count)
3786 	return i;
3787     else
3788 	return 1;
3789 }
3790 
3791 /*
3792  * ":cc", ":crewind", ":cfirst" and ":clast".
3793  * ":ll", ":lrewind", ":lfirst" and ":llast".
3794  * ":cdo", ":ldo", ":cfdo" and ":lfdo"
3795  */
3796     void
3797 ex_cc(exarg_T *eap)
3798 {
3799     qf_info_T	*qi = &ql_info;
3800     int		errornr;
3801 
3802     if (eap->cmdidx == CMD_ll
3803 	    || eap->cmdidx == CMD_lrewind
3804 	    || eap->cmdidx == CMD_lfirst
3805 	    || eap->cmdidx == CMD_llast
3806 	    || eap->cmdidx == CMD_ldo
3807 	    || eap->cmdidx == CMD_lfdo)
3808     {
3809 	qi = GET_LOC_LIST(curwin);
3810 	if (qi == NULL)
3811 	{
3812 	    EMSG(_(e_loclist));
3813 	    return;
3814 	}
3815     }
3816 
3817     if (eap->addr_count > 0)
3818 	errornr = (int)eap->line2;
3819     else
3820     {
3821 	if (eap->cmdidx == CMD_cc || eap->cmdidx == CMD_ll)
3822 	    errornr = 0;
3823 	else if (eap->cmdidx == CMD_crewind || eap->cmdidx == CMD_lrewind
3824 		|| eap->cmdidx == CMD_cfirst || eap->cmdidx == CMD_lfirst)
3825 	    errornr = 1;
3826 	else
3827 	    errornr = 32767;
3828     }
3829 
3830     /* For cdo and ldo commands, jump to the nth valid error.
3831      * For cfdo and lfdo commands, jump to the nth valid file entry.
3832      */
3833     if (eap->cmdidx == CMD_cdo || eap->cmdidx == CMD_ldo ||
3834 	    eap->cmdidx == CMD_cfdo || eap->cmdidx == CMD_lfdo)
3835 	errornr = qf_get_nth_valid_entry(qi,
3836 		eap->addr_count > 0 ? (int)eap->line1 : 1,
3837 		eap->cmdidx == CMD_cfdo || eap->cmdidx == CMD_lfdo);
3838 
3839     qf_jump(qi, 0, errornr, eap->forceit);
3840 }
3841 
3842 /*
3843  * ":cnext", ":cnfile", ":cNext" and ":cprevious".
3844  * ":lnext", ":lNext", ":lprevious", ":lnfile", ":lNfile" and ":lpfile".
3845  * Also, used by ":cdo", ":ldo", ":cfdo" and ":lfdo" commands.
3846  */
3847     void
3848 ex_cnext(exarg_T *eap)
3849 {
3850     qf_info_T	*qi = &ql_info;
3851     int		errornr;
3852 
3853     if (eap->cmdidx == CMD_lnext
3854 	    || eap->cmdidx == CMD_lNext
3855 	    || eap->cmdidx == CMD_lprevious
3856 	    || eap->cmdidx == CMD_lnfile
3857 	    || eap->cmdidx == CMD_lNfile
3858 	    || eap->cmdidx == CMD_lpfile
3859 	    || eap->cmdidx == CMD_ldo
3860 	    || eap->cmdidx == CMD_lfdo)
3861     {
3862 	qi = GET_LOC_LIST(curwin);
3863 	if (qi == NULL)
3864 	{
3865 	    EMSG(_(e_loclist));
3866 	    return;
3867 	}
3868     }
3869 
3870     if (eap->addr_count > 0 &&
3871 	    (eap->cmdidx != CMD_cdo && eap->cmdidx != CMD_ldo &&
3872 	     eap->cmdidx != CMD_cfdo && eap->cmdidx != CMD_lfdo))
3873 	errornr = (int)eap->line2;
3874     else
3875 	errornr = 1;
3876 
3877     qf_jump(qi, (eap->cmdidx == CMD_cnext || eap->cmdidx == CMD_lnext
3878 		|| eap->cmdidx == CMD_cdo || eap->cmdidx == CMD_ldo)
3879 	    ? FORWARD
3880 	    : (eap->cmdidx == CMD_cnfile || eap->cmdidx == CMD_lnfile
3881 		|| eap->cmdidx == CMD_cfdo || eap->cmdidx == CMD_lfdo)
3882 		? FORWARD_FILE
3883 		: (eap->cmdidx == CMD_cpfile || eap->cmdidx == CMD_lpfile
3884 		   || eap->cmdidx == CMD_cNfile || eap->cmdidx == CMD_lNfile)
3885 		    ? BACKWARD_FILE
3886 		    : BACKWARD,
3887 	    errornr, eap->forceit);
3888 }
3889 
3890 /*
3891  * ":cfile"/":cgetfile"/":caddfile" commands.
3892  * ":lfile"/":lgetfile"/":laddfile" commands.
3893  */
3894     void
3895 ex_cfile(exarg_T *eap)
3896 {
3897     char_u	*enc = NULL;
3898     win_T	*wp = NULL;
3899     qf_info_T	*qi = &ql_info;
3900 #ifdef FEAT_AUTOCMD
3901     char_u	*au_name = NULL;
3902 #endif
3903 
3904     if (eap->cmdidx == CMD_lfile || eap->cmdidx == CMD_lgetfile
3905 					       || eap->cmdidx == CMD_laddfile)
3906 	wp = curwin;
3907 
3908 #ifdef FEAT_AUTOCMD
3909     switch (eap->cmdidx)
3910     {
3911 	case CMD_cfile:	    au_name = (char_u *)"cfile"; break;
3912 	case CMD_cgetfile:  au_name = (char_u *)"cgetfile"; break;
3913 	case CMD_caddfile:  au_name = (char_u *)"caddfile"; break;
3914 	case CMD_lfile:	    au_name = (char_u *)"lfile"; break;
3915 	case CMD_lgetfile:  au_name = (char_u *)"lgetfile"; break;
3916 	case CMD_laddfile:  au_name = (char_u *)"laddfile"; break;
3917 	default: break;
3918     }
3919     if (au_name != NULL)
3920 	apply_autocmds(EVENT_QUICKFIXCMDPRE, au_name, NULL, FALSE, curbuf);
3921 #endif
3922 #ifdef FEAT_MBYTE
3923     enc = (*curbuf->b_p_menc != NUL) ? curbuf->b_p_menc : p_menc;
3924 #endif
3925 #ifdef FEAT_BROWSE
3926     if (cmdmod.browse)
3927     {
3928 	char_u *browse_file = do_browse(0, (char_u *)_("Error file"), eap->arg,
3929 				   NULL, NULL, BROWSE_FILTER_ALL_FILES, NULL);
3930 	if (browse_file == NULL)
3931 	    return;
3932 	set_string_option_direct((char_u *)"ef", -1, browse_file, OPT_FREE, 0);
3933 	vim_free(browse_file);
3934     }
3935     else
3936 #endif
3937     if (*eap->arg != NUL)
3938 	set_string_option_direct((char_u *)"ef", -1, eap->arg, OPT_FREE, 0);
3939 
3940     /*
3941      * This function is used by the :cfile, :cgetfile and :caddfile
3942      * commands.
3943      * :cfile always creates a new quickfix list and jumps to the
3944      * first error.
3945      * :cgetfile creates a new quickfix list but doesn't jump to the
3946      * first error.
3947      * :caddfile adds to an existing quickfix list. If there is no
3948      * quickfix list then a new list is created.
3949      */
3950     if (qf_init(wp, p_ef, p_efm, (eap->cmdidx != CMD_caddfile
3951 				  && eap->cmdidx != CMD_laddfile),
3952 						       *eap->cmdlinep, enc) > 0
3953 				  && (eap->cmdidx == CMD_cfile
3954 					     || eap->cmdidx == CMD_lfile))
3955     {
3956 #ifdef FEAT_AUTOCMD
3957 	if (au_name != NULL)
3958 	    apply_autocmds(EVENT_QUICKFIXCMDPOST, au_name, NULL, FALSE, curbuf);
3959 #endif
3960 	if (wp != NULL)
3961 	    qi = GET_LOC_LIST(wp);
3962 	qf_jump(qi, 0, 0, eap->forceit);	/* display first error */
3963     }
3964 
3965     else
3966     {
3967 #ifdef FEAT_AUTOCMD
3968 	if (au_name != NULL)
3969 	    apply_autocmds(EVENT_QUICKFIXCMDPOST, au_name, NULL, FALSE, curbuf);
3970 #endif
3971     }
3972 }
3973 
3974 /*
3975  * ":vimgrep {pattern} file(s)"
3976  * ":vimgrepadd {pattern} file(s)"
3977  * ":lvimgrep {pattern} file(s)"
3978  * ":lvimgrepadd {pattern} file(s)"
3979  */
3980     void
3981 ex_vimgrep(exarg_T *eap)
3982 {
3983     regmmatch_T	regmatch;
3984     int		fcount;
3985     char_u	**fnames;
3986     char_u	*fname;
3987     char_u	*title;
3988     char_u	*s;
3989     char_u	*p;
3990     int		fi;
3991     qf_info_T	*qi = &ql_info;
3992 #ifdef FEAT_AUTOCMD
3993     qfline_T	*cur_qf_start;
3994 #endif
3995     long	lnum;
3996     buf_T	*buf;
3997     int		duplicate_name = FALSE;
3998     int		using_dummy;
3999     int		redraw_for_dummy = FALSE;
4000     int		found_match;
4001     buf_T	*first_match_buf = NULL;
4002     time_t	seconds = 0;
4003     int		save_mls;
4004 #if defined(FEAT_AUTOCMD) && defined(FEAT_SYN_HL)
4005     char_u	*save_ei = NULL;
4006 #endif
4007     aco_save_T	aco;
4008     int		flags = 0;
4009     colnr_T	col;
4010     long	tomatch;
4011     char_u	*dirname_start = NULL;
4012     char_u	*dirname_now = NULL;
4013     char_u	*target_dir = NULL;
4014 #ifdef FEAT_AUTOCMD
4015     char_u	*au_name =  NULL;
4016 
4017     switch (eap->cmdidx)
4018     {
4019 	case CMD_vimgrep:     au_name = (char_u *)"vimgrep"; break;
4020 	case CMD_lvimgrep:    au_name = (char_u *)"lvimgrep"; break;
4021 	case CMD_vimgrepadd:  au_name = (char_u *)"vimgrepadd"; break;
4022 	case CMD_lvimgrepadd: au_name = (char_u *)"lvimgrepadd"; break;
4023 	case CMD_grep:	      au_name = (char_u *)"grep"; break;
4024 	case CMD_lgrep:	      au_name = (char_u *)"lgrep"; break;
4025 	case CMD_grepadd:     au_name = (char_u *)"grepadd"; break;
4026 	case CMD_lgrepadd:    au_name = (char_u *)"lgrepadd"; break;
4027 	default: break;
4028     }
4029     if (au_name != NULL && apply_autocmds(EVENT_QUICKFIXCMDPRE, au_name,
4030 					       curbuf->b_fname, TRUE, curbuf))
4031     {
4032 # ifdef FEAT_EVAL
4033 	if (aborting())
4034 	    return;
4035 # endif
4036     }
4037 #endif
4038 
4039     if (eap->cmdidx == CMD_lgrep
4040 	    || eap->cmdidx == CMD_lvimgrep
4041 	    || eap->cmdidx == CMD_lgrepadd
4042 	    || eap->cmdidx == CMD_lvimgrepadd)
4043     {
4044 	qi = ll_get_or_alloc_list(curwin);
4045 	if (qi == NULL)
4046 	    return;
4047     }
4048 
4049     if (eap->addr_count > 0)
4050 	tomatch = eap->line2;
4051     else
4052 	tomatch = MAXLNUM;
4053 
4054     /* Get the search pattern: either white-separated or enclosed in // */
4055     regmatch.regprog = NULL;
4056     title = vim_strsave(*eap->cmdlinep);
4057     p = skip_vimgrep_pat(eap->arg, &s, &flags);
4058     if (p == NULL)
4059     {
4060 	EMSG(_(e_invalpat));
4061 	goto theend;
4062     }
4063 
4064     if (s != NULL && *s == NUL)
4065     {
4066 	/* Pattern is empty, use last search pattern. */
4067 	if (last_search_pat() == NULL)
4068 	{
4069 	    EMSG(_(e_noprevre));
4070 	    goto theend;
4071 	}
4072 	regmatch.regprog = vim_regcomp(last_search_pat(), RE_MAGIC);
4073     }
4074     else
4075 	regmatch.regprog = vim_regcomp(s, RE_MAGIC);
4076 
4077     if (regmatch.regprog == NULL)
4078 	goto theend;
4079     regmatch.rmm_ic = p_ic;
4080     regmatch.rmm_maxcol = 0;
4081 
4082     p = skipwhite(p);
4083     if (*p == NUL)
4084     {
4085 	EMSG(_("E683: File name missing or invalid pattern"));
4086 	goto theend;
4087     }
4088 
4089     if ((eap->cmdidx != CMD_grepadd && eap->cmdidx != CMD_lgrepadd &&
4090 	 eap->cmdidx != CMD_vimgrepadd && eap->cmdidx != CMD_lvimgrepadd)
4091 					|| qi->qf_curlist == qi->qf_listcount)
4092 	/* make place for a new list */
4093 	qf_new_list(qi, title != NULL ? title : *eap->cmdlinep);
4094 
4095     /* parse the list of arguments */
4096     if (get_arglist_exp(p, &fcount, &fnames, TRUE) == FAIL)
4097 	goto theend;
4098     if (fcount == 0)
4099     {
4100 	EMSG(_(e_nomatch));
4101 	goto theend;
4102     }
4103 
4104     dirname_start = alloc_id(MAXPATHL, aid_qf_dirname_start);
4105     dirname_now = alloc_id(MAXPATHL, aid_qf_dirname_now);
4106     if (dirname_start == NULL || dirname_now == NULL)
4107     {
4108 	FreeWild(fcount, fnames);
4109 	goto theend;
4110     }
4111 
4112     /* Remember the current directory, because a BufRead autocommand that does
4113      * ":lcd %:p:h" changes the meaning of short path names. */
4114     mch_dirname(dirname_start, MAXPATHL);
4115 
4116 #ifdef FEAT_AUTOCMD
4117      /* Remember the value of qf_start, so that we can check for autocommands
4118       * changing the current quickfix list. */
4119     cur_qf_start = qi->qf_lists[qi->qf_curlist].qf_start;
4120 #endif
4121 
4122     seconds = (time_t)0;
4123     for (fi = 0; fi < fcount && !got_int && tomatch > 0; ++fi)
4124     {
4125 	fname = shorten_fname1(fnames[fi]);
4126 	if (time(NULL) > seconds)
4127 	{
4128 	    /* Display the file name every second or so, show the user we are
4129 	     * working on it. */
4130 	    seconds = time(NULL);
4131 	    msg_start();
4132 	    p = msg_strtrunc(fname, TRUE);
4133 	    if (p == NULL)
4134 		msg_outtrans(fname);
4135 	    else
4136 	    {
4137 		msg_outtrans(p);
4138 		vim_free(p);
4139 	    }
4140 	    msg_clr_eos();
4141 	    msg_didout = FALSE;	    /* overwrite this message */
4142 	    msg_nowait = TRUE;	    /* don't wait for this message */
4143 	    msg_col = 0;
4144 	    out_flush();
4145 	}
4146 
4147 	buf = buflist_findname_exp(fnames[fi]);
4148 	if (buf == NULL || buf->b_ml.ml_mfp == NULL)
4149 	{
4150 	    /* Remember that a buffer with this name already exists. */
4151 	    duplicate_name = (buf != NULL);
4152 	    using_dummy = TRUE;
4153 	    redraw_for_dummy = TRUE;
4154 
4155 #if defined(FEAT_AUTOCMD) && defined(FEAT_SYN_HL)
4156 	    /* Don't do Filetype autocommands to avoid loading syntax and
4157 	     * indent scripts, a great speed improvement. */
4158 	    save_ei = au_event_disable(",Filetype");
4159 #endif
4160 	    /* Don't use modelines here, it's useless. */
4161 	    save_mls = p_mls;
4162 	    p_mls = 0;
4163 
4164 	    /* Load file into a buffer, so that 'fileencoding' is detected,
4165 	     * autocommands applied, etc. */
4166 	    buf = load_dummy_buffer(fname, dirname_start, dirname_now);
4167 
4168 	    p_mls = save_mls;
4169 #if defined(FEAT_AUTOCMD) && defined(FEAT_SYN_HL)
4170 	    au_event_restore(save_ei);
4171 #endif
4172 	}
4173 	else
4174 	    /* Use existing, loaded buffer. */
4175 	    using_dummy = FALSE;
4176 
4177 #ifdef FEAT_AUTOCMD
4178 	if (cur_qf_start != qi->qf_lists[qi->qf_curlist].qf_start)
4179 	{
4180 	    int idx;
4181 
4182 	    /* Autocommands changed the quickfix list.  Find the one we were
4183 	     * using and restore it. */
4184 	    for (idx = 0; idx < LISTCOUNT; ++idx)
4185 		if (cur_qf_start == qi->qf_lists[idx].qf_start)
4186 		{
4187 		    qi->qf_curlist = idx;
4188 		    break;
4189 		}
4190 	    if (idx == LISTCOUNT)
4191 	    {
4192 		/* List cannot be found, create a new one. */
4193 		qf_new_list(qi, *eap->cmdlinep);
4194 		cur_qf_start = qi->qf_lists[qi->qf_curlist].qf_start;
4195 	    }
4196 	}
4197 #endif
4198 
4199 	if (buf == NULL)
4200 	{
4201 	    if (!got_int)
4202 		smsg((char_u *)_("Cannot open file \"%s\""), fname);
4203 	}
4204 	else
4205 	{
4206 	    /* Try for a match in all lines of the buffer.
4207 	     * For ":1vimgrep" look for first match only. */
4208 	    found_match = FALSE;
4209 	    for (lnum = 1; lnum <= buf->b_ml.ml_line_count && tomatch > 0;
4210 								       ++lnum)
4211 	    {
4212 		col = 0;
4213 		while (vim_regexec_multi(&regmatch, curwin, buf, lnum,
4214 							  col, NULL, NULL) > 0)
4215 		{
4216 		    /* Pass the buffer number so that it gets used even for a
4217 		     * dummy buffer, unless duplicate_name is set, then the
4218 		     * buffer will be wiped out below. */
4219 		    if (qf_add_entry(qi,
4220 				qi->qf_curlist,
4221 				NULL,       /* dir */
4222 				fname,
4223 				duplicate_name ? 0 : buf->b_fnum,
4224 				ml_get_buf(buf,
4225 				     regmatch.startpos[0].lnum + lnum, FALSE),
4226 				regmatch.startpos[0].lnum + lnum,
4227 				regmatch.startpos[0].col + 1,
4228 				FALSE,      /* vis_col */
4229 				NULL,	    /* search pattern */
4230 				0,	    /* nr */
4231 				0,	    /* type */
4232 				TRUE	    /* valid */
4233 				) == FAIL)
4234 		    {
4235 			got_int = TRUE;
4236 			break;
4237 		    }
4238 		    found_match = TRUE;
4239 		    if (--tomatch == 0)
4240 			break;
4241 		    if ((flags & VGR_GLOBAL) == 0
4242 					       || regmatch.endpos[0].lnum > 0)
4243 			break;
4244 		    col = regmatch.endpos[0].col
4245 					    + (col == regmatch.endpos[0].col);
4246 		    if (col > (colnr_T)STRLEN(ml_get_buf(buf, lnum, FALSE)))
4247 			break;
4248 		}
4249 		line_breakcheck();
4250 		if (got_int)
4251 		    break;
4252 	    }
4253 #ifdef FEAT_AUTOCMD
4254 	    cur_qf_start = qi->qf_lists[qi->qf_curlist].qf_start;
4255 #endif
4256 
4257 	    if (using_dummy)
4258 	    {
4259 		if (found_match && first_match_buf == NULL)
4260 		    first_match_buf = buf;
4261 		if (duplicate_name)
4262 		{
4263 		    /* Never keep a dummy buffer if there is another buffer
4264 		     * with the same name. */
4265 		    wipe_dummy_buffer(buf, dirname_start);
4266 		    buf = NULL;
4267 		}
4268 		else if (!cmdmod.hide
4269 			    || buf->b_p_bh[0] == 'u'	/* "unload" */
4270 			    || buf->b_p_bh[0] == 'w'	/* "wipe" */
4271 			    || buf->b_p_bh[0] == 'd')	/* "delete" */
4272 		{
4273 		    /* When no match was found we don't need to remember the
4274 		     * buffer, wipe it out.  If there was a match and it
4275 		     * wasn't the first one or we won't jump there: only
4276 		     * unload the buffer.
4277 		     * Ignore 'hidden' here, because it may lead to having too
4278 		     * many swap files. */
4279 		    if (!found_match)
4280 		    {
4281 			wipe_dummy_buffer(buf, dirname_start);
4282 			buf = NULL;
4283 		    }
4284 		    else if (buf != first_match_buf || (flags & VGR_NOJUMP))
4285 		    {
4286 			unload_dummy_buffer(buf, dirname_start);
4287 			/* Keeping the buffer, remove the dummy flag. */
4288 			buf->b_flags &= ~BF_DUMMY;
4289 			buf = NULL;
4290 		    }
4291 		}
4292 
4293 		if (buf != NULL)
4294 		{
4295 		    /* Keeping the buffer, remove the dummy flag. */
4296 		    buf->b_flags &= ~BF_DUMMY;
4297 
4298 		    /* If the buffer is still loaded we need to use the
4299 		     * directory we jumped to below. */
4300 		    if (buf == first_match_buf
4301 			    && target_dir == NULL
4302 			    && STRCMP(dirname_start, dirname_now) != 0)
4303 			target_dir = vim_strsave(dirname_now);
4304 
4305 		    /* The buffer is still loaded, the Filetype autocommands
4306 		     * need to be done now, in that buffer.  And the modelines
4307 		     * need to be done (again).  But not the window-local
4308 		     * options! */
4309 		    aucmd_prepbuf(&aco, buf);
4310 #if defined(FEAT_AUTOCMD) && defined(FEAT_SYN_HL)
4311 		    apply_autocmds(EVENT_FILETYPE, buf->b_p_ft,
4312 						     buf->b_fname, TRUE, buf);
4313 #endif
4314 		    do_modelines(OPT_NOWIN);
4315 		    aucmd_restbuf(&aco);
4316 		}
4317 	    }
4318 	}
4319     }
4320 
4321     FreeWild(fcount, fnames);
4322 
4323     qi->qf_lists[qi->qf_curlist].qf_nonevalid = FALSE;
4324     qi->qf_lists[qi->qf_curlist].qf_ptr = qi->qf_lists[qi->qf_curlist].qf_start;
4325     qi->qf_lists[qi->qf_curlist].qf_index = 1;
4326 
4327 #ifdef FEAT_WINDOWS
4328     qf_update_buffer(qi, NULL);
4329 #endif
4330 
4331 #ifdef FEAT_AUTOCMD
4332     if (au_name != NULL)
4333 	apply_autocmds(EVENT_QUICKFIXCMDPOST, au_name,
4334 					       curbuf->b_fname, TRUE, curbuf);
4335 #endif
4336 
4337     /* Jump to first match. */
4338     if (qi->qf_lists[qi->qf_curlist].qf_count > 0)
4339     {
4340 	if ((flags & VGR_NOJUMP) == 0)
4341 	{
4342 	    buf = curbuf;
4343 	    qf_jump(qi, 0, 0, eap->forceit);
4344 	    if (buf != curbuf)
4345 		/* If we jumped to another buffer redrawing will already be
4346 		 * taken care of. */
4347 		redraw_for_dummy = FALSE;
4348 
4349 	    /* Jump to the directory used after loading the buffer. */
4350 	    if (curbuf == first_match_buf && target_dir != NULL)
4351 	    {
4352 		exarg_T ea;
4353 
4354 		ea.arg = target_dir;
4355 		ea.cmdidx = CMD_lcd;
4356 		ex_cd(&ea);
4357 	    }
4358 	}
4359     }
4360     else
4361 	EMSG2(_(e_nomatch2), s);
4362 
4363     /* If we loaded a dummy buffer into the current window, the autocommands
4364      * may have messed up things, need to redraw and recompute folds. */
4365     if (redraw_for_dummy)
4366     {
4367 #ifdef FEAT_FOLDING
4368 	foldUpdateAll(curwin);
4369 #else
4370 	redraw_later(NOT_VALID);
4371 #endif
4372     }
4373 
4374 theend:
4375     vim_free(title);
4376     vim_free(dirname_now);
4377     vim_free(dirname_start);
4378     vim_free(target_dir);
4379     vim_regfree(regmatch.regprog);
4380 }
4381 
4382 /*
4383  * Restore current working directory to "dirname_start" if they differ, taking
4384  * into account whether it is set locally or globally.
4385  */
4386     static void
4387 restore_start_dir(char_u *dirname_start)
4388 {
4389     char_u *dirname_now = alloc(MAXPATHL);
4390 
4391     if (NULL != dirname_now)
4392     {
4393 	mch_dirname(dirname_now, MAXPATHL);
4394 	if (STRCMP(dirname_start, dirname_now) != 0)
4395 	{
4396 	    /* If the directory has changed, change it back by building up an
4397 	     * appropriate ex command and executing it. */
4398 	    exarg_T ea;
4399 
4400 	    ea.arg = dirname_start;
4401 	    ea.cmdidx = (curwin->w_localdir == NULL) ? CMD_cd : CMD_lcd;
4402 	    ex_cd(&ea);
4403 	}
4404 	vim_free(dirname_now);
4405     }
4406 }
4407 
4408 /*
4409  * Load file "fname" into a dummy buffer and return the buffer pointer,
4410  * placing the directory resulting from the buffer load into the
4411  * "resulting_dir" pointer. "resulting_dir" must be allocated by the caller
4412  * prior to calling this function. Restores directory to "dirname_start" prior
4413  * to returning, if autocmds or the 'autochdir' option have changed it.
4414  *
4415  * If creating the dummy buffer does not fail, must call unload_dummy_buffer()
4416  * or wipe_dummy_buffer() later!
4417  *
4418  * Returns NULL if it fails.
4419  */
4420     static buf_T *
4421 load_dummy_buffer(
4422     char_u	*fname,
4423     char_u	*dirname_start,  /* in: old directory */
4424     char_u	*resulting_dir)  /* out: new directory */
4425 {
4426     buf_T	*newbuf;
4427     bufref_T	newbufref;
4428     bufref_T	newbuf_to_wipe;
4429     int		failed = TRUE;
4430     aco_save_T	aco;
4431 
4432     /* Allocate a buffer without putting it in the buffer list. */
4433     newbuf = buflist_new(NULL, NULL, (linenr_T)1, BLN_DUMMY);
4434     if (newbuf == NULL)
4435 	return NULL;
4436     set_bufref(&newbufref, newbuf);
4437 
4438     /* Init the options. */
4439     buf_copy_options(newbuf, BCO_ENTER | BCO_NOHELP);
4440 
4441     /* need to open the memfile before putting the buffer in a window */
4442     if (ml_open(newbuf) == OK)
4443     {
4444 	/* set curwin/curbuf to buf and save a few things */
4445 	aucmd_prepbuf(&aco, newbuf);
4446 
4447 	/* Need to set the filename for autocommands. */
4448 	(void)setfname(curbuf, fname, NULL, FALSE);
4449 
4450 	/* Create swap file now to avoid the ATTENTION message. */
4451 	check_need_swap(TRUE);
4452 
4453 	/* Remove the "dummy" flag, otherwise autocommands may not
4454 	 * work. */
4455 	curbuf->b_flags &= ~BF_DUMMY;
4456 
4457 	newbuf_to_wipe.br_buf = NULL;
4458 	if (readfile(fname, NULL,
4459 		    (linenr_T)0, (linenr_T)0, (linenr_T)MAXLNUM,
4460 		    NULL, READ_NEW | READ_DUMMY) == OK
4461 		&& !got_int
4462 		&& !(curbuf->b_flags & BF_NEW))
4463 	{
4464 	    failed = FALSE;
4465 	    if (curbuf != newbuf)
4466 	    {
4467 		/* Bloody autocommands changed the buffer!  Can happen when
4468 		 * using netrw and editing a remote file.  Use the current
4469 		 * buffer instead, delete the dummy one after restoring the
4470 		 * window stuff. */
4471 		set_bufref(&newbuf_to_wipe, newbuf);
4472 		newbuf = curbuf;
4473 	    }
4474 	}
4475 
4476 	/* restore curwin/curbuf and a few other things */
4477 	aucmd_restbuf(&aco);
4478 	if (newbuf_to_wipe.br_buf != NULL && bufref_valid(&newbuf_to_wipe))
4479 	    wipe_buffer(newbuf_to_wipe.br_buf, FALSE);
4480 
4481 	/* Add back the "dummy" flag, otherwise buflist_findname_stat() won't
4482 	 * skip it. */
4483 	newbuf->b_flags |= BF_DUMMY;
4484     }
4485 
4486     /*
4487      * When autocommands/'autochdir' option changed directory: go back.
4488      * Let the caller know what the resulting dir was first, in case it is
4489      * important.
4490      */
4491     mch_dirname(resulting_dir, MAXPATHL);
4492     restore_start_dir(dirname_start);
4493 
4494     if (!bufref_valid(&newbufref))
4495 	return NULL;
4496     if (failed)
4497     {
4498 	wipe_dummy_buffer(newbuf, dirname_start);
4499 	return NULL;
4500     }
4501     return newbuf;
4502 }
4503 
4504 /*
4505  * Wipe out the dummy buffer that load_dummy_buffer() created. Restores
4506  * directory to "dirname_start" prior to returning, if autocmds or the
4507  * 'autochdir' option have changed it.
4508  */
4509     static void
4510 wipe_dummy_buffer(buf_T *buf, char_u *dirname_start)
4511 {
4512     if (curbuf != buf)		/* safety check */
4513     {
4514 #if defined(FEAT_AUTOCMD) && defined(FEAT_EVAL)
4515 	cleanup_T   cs;
4516 
4517 	/* Reset the error/interrupt/exception state here so that aborting()
4518 	 * returns FALSE when wiping out the buffer.  Otherwise it doesn't
4519 	 * work when got_int is set. */
4520 	enter_cleanup(&cs);
4521 #endif
4522 
4523 	wipe_buffer(buf, FALSE);
4524 
4525 #if defined(FEAT_AUTOCMD) && defined(FEAT_EVAL)
4526 	/* Restore the error/interrupt/exception state if not discarded by a
4527 	 * new aborting error, interrupt, or uncaught exception. */
4528 	leave_cleanup(&cs);
4529 #endif
4530 	/* When autocommands/'autochdir' option changed directory: go back. */
4531 	restore_start_dir(dirname_start);
4532     }
4533 }
4534 
4535 /*
4536  * Unload the dummy buffer that load_dummy_buffer() created. Restores
4537  * directory to "dirname_start" prior to returning, if autocmds or the
4538  * 'autochdir' option have changed it.
4539  */
4540     static void
4541 unload_dummy_buffer(buf_T *buf, char_u *dirname_start)
4542 {
4543     if (curbuf != buf)		/* safety check */
4544     {
4545 	close_buffer(NULL, buf, DOBUF_UNLOAD, FALSE);
4546 
4547 	/* When autocommands/'autochdir' option changed directory: go back. */
4548 	restore_start_dir(dirname_start);
4549     }
4550 }
4551 
4552 #if defined(FEAT_EVAL) || defined(PROTO)
4553 /*
4554  * Add each quickfix error to list "list" as a dictionary.
4555  * If qf_idx is -1, use the current list. Otherwise, use the specified list.
4556  */
4557     int
4558 get_errorlist(win_T *wp, int qf_idx, list_T *list)
4559 {
4560     qf_info_T	*qi = &ql_info;
4561     dict_T	*dict;
4562     char_u	buf[2];
4563     qfline_T	*qfp;
4564     int		i;
4565     int		bufnum;
4566 
4567     if (wp != NULL)
4568     {
4569 	qi = GET_LOC_LIST(wp);
4570 	if (qi == NULL)
4571 	    return FAIL;
4572     }
4573 
4574     if (qf_idx == -1)
4575 	qf_idx = qi->qf_curlist;
4576 
4577     if (qf_idx >= qi->qf_listcount
4578 	    || qi->qf_lists[qf_idx].qf_count == 0)
4579 	return FAIL;
4580 
4581     qfp = qi->qf_lists[qf_idx].qf_start;
4582     for (i = 1; !got_int && i <= qi->qf_lists[qf_idx].qf_count; ++i)
4583     {
4584 	/* Handle entries with a non-existing buffer number. */
4585 	bufnum = qfp->qf_fnum;
4586 	if (bufnum != 0 && (buflist_findnr(bufnum) == NULL))
4587 	    bufnum = 0;
4588 
4589 	if ((dict = dict_alloc()) == NULL)
4590 	    return FAIL;
4591 	if (list_append_dict(list, dict) == FAIL)
4592 	    return FAIL;
4593 
4594 	buf[0] = qfp->qf_type;
4595 	buf[1] = NUL;
4596 	if ( dict_add_nr_str(dict, "bufnr", (long)bufnum, NULL) == FAIL
4597 	  || dict_add_nr_str(dict, "lnum",  (long)qfp->qf_lnum, NULL) == FAIL
4598 	  || dict_add_nr_str(dict, "col",   (long)qfp->qf_col, NULL) == FAIL
4599 	  || dict_add_nr_str(dict, "vcol",  (long)qfp->qf_viscol, NULL) == FAIL
4600 	  || dict_add_nr_str(dict, "nr",    (long)qfp->qf_nr, NULL) == FAIL
4601 	  || dict_add_nr_str(dict, "pattern",  0L,
4602 	     qfp->qf_pattern == NULL ? (char_u *)"" : qfp->qf_pattern) == FAIL
4603 	  || dict_add_nr_str(dict, "text",  0L,
4604 		   qfp->qf_text == NULL ? (char_u *)"" : qfp->qf_text) == FAIL
4605 	  || dict_add_nr_str(dict, "type",  0L, buf) == FAIL
4606 	  || dict_add_nr_str(dict, "valid", (long)qfp->qf_valid, NULL) == FAIL)
4607 	    return FAIL;
4608 
4609 	qfp = qfp->qf_next;
4610 	if (qfp == NULL)
4611 	    break;
4612     }
4613     return OK;
4614 }
4615 
4616 /*
4617  * Flags used by getqflist()/getloclist() to determine which fields to return.
4618  */
4619 enum {
4620     QF_GETLIST_NONE	= 0x0,
4621     QF_GETLIST_TITLE	= 0x1,
4622     QF_GETLIST_ITEMS	= 0x2,
4623     QF_GETLIST_NR	= 0x4,
4624     QF_GETLIST_WINID	= 0x8,
4625     QF_GETLIST_CONTEXT	= 0x10,
4626     QF_GETLIST_ALL	= 0xFF
4627 };
4628 
4629 /*
4630  * Return quickfix/location list details (title) as a
4631  * dictionary. 'what' contains the details to return. If 'list_idx' is -1,
4632  * then current list is used. Otherwise the specified list is used.
4633  */
4634     int
4635 get_errorlist_properties(win_T *wp, dict_T *what, dict_T *retdict)
4636 {
4637     qf_info_T	*qi = &ql_info;
4638     int		status = OK;
4639     int		qf_idx;
4640     dictitem_T	*di;
4641     int		flags = QF_GETLIST_NONE;
4642 
4643     if (wp != NULL)
4644     {
4645 	qi = GET_LOC_LIST(wp);
4646 	if (qi == NULL)
4647 	{
4648 	    /* If querying for the size of the location list, return 0 */
4649 	    if (((di = dict_find(what, (char_u *)"nr", -1)) != NULL) &&
4650 		    (di->di_tv.v_type == VAR_STRING) &&
4651 		    (STRCMP(di->di_tv.vval.v_string, "$") == 0))
4652 		    return dict_add_nr_str(retdict, "nr", 0, NULL);
4653 	    return FAIL;
4654 	}
4655     }
4656 
4657     qf_idx = qi->qf_curlist;		/* default is the current list */
4658     if ((di = dict_find(what, (char_u *)"nr", -1)) != NULL)
4659     {
4660 	/* Use the specified quickfix/location list */
4661 	if (di->di_tv.v_type == VAR_NUMBER)
4662 	{
4663 	    /* for zero use the current list */
4664 	    if (di->di_tv.vval.v_number != 0)
4665 	    {
4666 		qf_idx = di->di_tv.vval.v_number - 1;
4667 		if (qf_idx < 0 || qf_idx >= qi->qf_listcount)
4668 		    return FAIL;
4669 	    } else if (qi->qf_listcount == 0)	    /* stack is empty */
4670 		return FAIL;
4671 	    flags |= QF_GETLIST_NR;
4672 	} else if ((di->di_tv.v_type == VAR_STRING) &&
4673 		(STRCMP(di->di_tv.vval.v_string, "$") == 0))
4674 	{
4675 	    /* Get the last quickfix list number */
4676 	    if (qi->qf_listcount > 0)
4677 		qf_idx = qi->qf_listcount - 1;
4678 	    else
4679 		qf_idx = -1;	/* Quickfix stack is empty */
4680 	    flags |= QF_GETLIST_NR;
4681 	}
4682 	else
4683 	    return FAIL;
4684     }
4685 
4686     if (qf_idx != -1)
4687     {
4688 	if (dict_find(what, (char_u *)"all", -1) != NULL)
4689 	    flags |= QF_GETLIST_ALL;
4690 
4691 	if (dict_find(what, (char_u *)"title", -1) != NULL)
4692 	    flags |= QF_GETLIST_TITLE;
4693 
4694 	if (dict_find(what, (char_u *)"winid", -1) != NULL)
4695 	    flags |= QF_GETLIST_WINID;
4696 
4697 	if (dict_find(what, (char_u *)"context", -1) != NULL)
4698 	    flags |= QF_GETLIST_CONTEXT;
4699 
4700 	if (dict_find(what, (char_u *)"items", -1) != NULL)
4701 	    flags |= QF_GETLIST_ITEMS;
4702     }
4703 
4704     if (flags & QF_GETLIST_TITLE)
4705     {
4706 	char_u	*t;
4707 	t = qi->qf_lists[qf_idx].qf_title;
4708 	if (t == NULL)
4709 	    t = (char_u *)"";
4710 	status = dict_add_nr_str(retdict, "title", 0L, t);
4711     }
4712     if ((status == OK) && (flags & QF_GETLIST_NR))
4713 	status = dict_add_nr_str(retdict, "nr", qf_idx + 1, NULL);
4714     if ((status == OK) && (flags & QF_GETLIST_WINID))
4715     {
4716 	win_T	*win;
4717 	win = qf_find_win(qi);
4718 	if (win != NULL)
4719 	    status = dict_add_nr_str(retdict, "winid", win->w_id, NULL);
4720     }
4721     if ((status == OK) && (flags & QF_GETLIST_ITEMS))
4722     {
4723 	list_T	*l = list_alloc();
4724 	if (l != NULL)
4725 	{
4726 	    (void)get_errorlist(wp, qf_idx, l);
4727 	    dict_add_list(retdict, "items", l);
4728 	}
4729 	else
4730 	    status = FAIL;
4731     }
4732 
4733     if ((status == OK) && (flags & QF_GETLIST_CONTEXT))
4734     {
4735 	if (qi->qf_lists[qf_idx].qf_ctx != NULL)
4736 	{
4737 	    di = dictitem_alloc((char_u *)"context");
4738 	    if (di != NULL)
4739 	    {
4740 		copy_tv(qi->qf_lists[qf_idx].qf_ctx, &di->di_tv);
4741 		status = dict_add(retdict, di);
4742 		if (status == FAIL)
4743 		    dictitem_free(di);
4744 	    }
4745 	    else
4746 		status = FAIL;
4747 	}
4748 	else
4749 	    status = dict_add_nr_str(retdict, "context", 0L, (char_u *)"");
4750     }
4751 
4752     return status;
4753 }
4754 
4755 /*
4756  * Add list of entries to quickfix/location list. Each list entry is
4757  * a dictionary with item information.
4758  */
4759     static int
4760 qf_add_entries(
4761 	qf_info_T	*qi,
4762 	int		qf_idx,
4763 	list_T		*list,
4764 	char_u		*title,
4765 	int		action)
4766 {
4767     listitem_T	*li;
4768     dict_T	*d;
4769     char_u	*filename, *pattern, *text, *type;
4770     int		bufnum;
4771     long	lnum;
4772     int		col, nr;
4773     int		vcol;
4774 #ifdef FEAT_WINDOWS
4775     qfline_T	*old_last = NULL;
4776 #endif
4777     int		valid, status;
4778     int		retval = OK;
4779     int		did_bufnr_emsg = FALSE;
4780 
4781     if (action == ' ' || qf_idx == qi->qf_listcount)
4782     {
4783 	/* make place for a new list */
4784 	qf_new_list(qi, title);
4785 	qf_idx = qi->qf_curlist;
4786     }
4787 #ifdef FEAT_WINDOWS
4788     else if (action == 'a' && qi->qf_lists[qf_idx].qf_count > 0)
4789 	/* Adding to existing list, use last entry. */
4790 	old_last = qi->qf_lists[qf_idx].qf_last;
4791 #endif
4792     else if (action == 'r')
4793     {
4794 	qf_free_items(qi, qf_idx);
4795 	qf_store_title(qi, qf_idx, title);
4796     }
4797 
4798     for (li = list->lv_first; li != NULL; li = li->li_next)
4799     {
4800 	if (li->li_tv.v_type != VAR_DICT)
4801 	    continue; /* Skip non-dict items */
4802 
4803 	d = li->li_tv.vval.v_dict;
4804 	if (d == NULL)
4805 	    continue;
4806 
4807 	filename = get_dict_string(d, (char_u *)"filename", TRUE);
4808 	bufnum = (int)get_dict_number(d, (char_u *)"bufnr");
4809 	lnum = (int)get_dict_number(d, (char_u *)"lnum");
4810 	col = (int)get_dict_number(d, (char_u *)"col");
4811 	vcol = (int)get_dict_number(d, (char_u *)"vcol");
4812 	nr = (int)get_dict_number(d, (char_u *)"nr");
4813 	type = get_dict_string(d, (char_u *)"type", TRUE);
4814 	pattern = get_dict_string(d, (char_u *)"pattern", TRUE);
4815 	text = get_dict_string(d, (char_u *)"text", TRUE);
4816 	if (text == NULL)
4817 	    text = vim_strsave((char_u *)"");
4818 
4819 	valid = TRUE;
4820 	if ((filename == NULL && bufnum == 0) || (lnum == 0 && pattern == NULL))
4821 	    valid = FALSE;
4822 
4823 	/* Mark entries with non-existing buffer number as not valid. Give the
4824 	 * error message only once. */
4825 	if (bufnum != 0 && (buflist_findnr(bufnum) == NULL))
4826 	{
4827 	    if (!did_bufnr_emsg)
4828 	    {
4829 		did_bufnr_emsg = TRUE;
4830 		EMSGN(_("E92: Buffer %ld not found"), bufnum);
4831 	    }
4832 	    valid = FALSE;
4833 	    bufnum = 0;
4834 	}
4835 
4836 	/* If the 'valid' field is present it overrules the detected value. */
4837 	if ((dict_find(d, (char_u *)"valid", -1)) != NULL)
4838 	    valid = (int)get_dict_number(d, (char_u *)"valid");
4839 
4840 	status =  qf_add_entry(qi,
4841 			       qf_idx,
4842 			       NULL,	    /* dir */
4843 			       filename,
4844 			       bufnum,
4845 			       text,
4846 			       lnum,
4847 			       col,
4848 			       vcol,	    /* vis_col */
4849 			       pattern,	    /* search pattern */
4850 			       nr,
4851 			       type == NULL ? NUL : *type,
4852 			       valid);
4853 
4854 	vim_free(filename);
4855 	vim_free(pattern);
4856 	vim_free(text);
4857 	vim_free(type);
4858 
4859 	if (status == FAIL)
4860 	{
4861 	    retval = FAIL;
4862 	    break;
4863 	}
4864     }
4865 
4866     if (qi->qf_lists[qf_idx].qf_index == 0)
4867 	/* no valid entry */
4868 	qi->qf_lists[qf_idx].qf_nonevalid = TRUE;
4869     else
4870 	qi->qf_lists[qf_idx].qf_nonevalid = FALSE;
4871     if (action != 'a')
4872     {
4873 	qi->qf_lists[qf_idx].qf_ptr =
4874 	    qi->qf_lists[qf_idx].qf_start;
4875 	if (qi->qf_lists[qf_idx].qf_count > 0)
4876 	    qi->qf_lists[qf_idx].qf_index = 1;
4877     }
4878 
4879 #ifdef FEAT_WINDOWS
4880     /* Don't update the cursor in quickfix window when appending entries */
4881     qf_update_buffer(qi, old_last);
4882 #endif
4883 
4884     return retval;
4885 }
4886 
4887     static int
4888 qf_set_properties(qf_info_T *qi, dict_T *what, int action)
4889 {
4890     dictitem_T	*di;
4891     int		retval = FAIL;
4892     int		qf_idx;
4893     int		newlist = FALSE;
4894 
4895     if (action == ' ' || qi->qf_curlist == qi->qf_listcount)
4896 	newlist = TRUE;
4897 
4898     qf_idx = qi->qf_curlist;		/* default is the current list */
4899     if ((di = dict_find(what, (char_u *)"nr", -1)) != NULL)
4900     {
4901 	/* Use the specified quickfix/location list */
4902 	if (di->di_tv.v_type == VAR_NUMBER)
4903 	{
4904 	    /* for zero use the current list */
4905 	    if (di->di_tv.vval.v_number != 0)
4906 		qf_idx = di->di_tv.vval.v_number - 1;
4907 
4908 	    if ((action == ' ' || action == 'a') &&
4909 		    qf_idx == qi->qf_listcount)
4910 		/*
4911 		 * When creating a new list, accept qf_idx pointing to the next
4912 		 * non-available list
4913 		 */
4914 		newlist = TRUE;
4915 	    else if (qf_idx < 0 || qf_idx >= qi->qf_listcount)
4916 		return FAIL;
4917 	    else
4918 		newlist = FALSE;	/* use the specified list */
4919 	} else if (di->di_tv.v_type == VAR_STRING &&
4920 		STRCMP(di->di_tv.vval.v_string, "$") == 0 &&
4921 		qi->qf_listcount > 0)
4922 	{
4923 	    qf_idx = qi->qf_listcount - 1;
4924 	    newlist = FALSE;
4925 	}
4926 	else
4927 	    return FAIL;
4928     }
4929 
4930     if (newlist)
4931     {
4932 	qf_new_list(qi, NULL);
4933 	qf_idx = qi->qf_curlist;
4934     }
4935 
4936     if ((di = dict_find(what, (char_u *)"title", -1)) != NULL)
4937     {
4938 	if (di->di_tv.v_type == VAR_STRING)
4939 	{
4940 	    vim_free(qi->qf_lists[qf_idx].qf_title);
4941 	    qi->qf_lists[qf_idx].qf_title =
4942 		get_dict_string(what, (char_u *)"title", TRUE);
4943 	    if (qf_idx == qi->qf_curlist)
4944 		qf_update_win_titlevar(qi);
4945 	    retval = OK;
4946 	}
4947     }
4948     if ((di = dict_find(what, (char_u *)"items", -1)) != NULL)
4949     {
4950 	if (di->di_tv.v_type == VAR_LIST)
4951 	{
4952 	    char_u *title_save = vim_strsave(qi->qf_lists[qf_idx].qf_title);
4953 
4954 	    retval = qf_add_entries(qi, qf_idx, di->di_tv.vval.v_list,
4955 		    title_save, action == ' ' ? 'a' : action);
4956 	    vim_free(title_save);
4957 	}
4958     }
4959 
4960     if ((di = dict_find(what, (char_u *)"context", -1)) != NULL)
4961     {
4962 	typval_T	*ctx;
4963 
4964 	free_tv(qi->qf_lists[qf_idx].qf_ctx);
4965 	ctx =  alloc_tv();
4966 	if (ctx != NULL)
4967 	    copy_tv(&di->di_tv, ctx);
4968 	qi->qf_lists[qf_idx].qf_ctx = ctx;
4969 	retval = OK;
4970     }
4971 
4972     return retval;
4973 }
4974 
4975 /*
4976  * Find the non-location list window with the specified location list.
4977  */
4978     static win_T *
4979 find_win_with_ll(qf_info_T *qi)
4980 {
4981     win_T	*wp = NULL;
4982 
4983     FOR_ALL_WINDOWS(wp)
4984 	if ((wp->w_llist == qi) && !bt_quickfix(wp->w_buffer))
4985 	    return wp;
4986 
4987     return NULL;
4988 }
4989 
4990 /*
4991  * Free the entire quickfix/location list stack.
4992  * If the quickfix/location list window is open, then clear it.
4993  */
4994     static void
4995 qf_free_stack(win_T *wp, qf_info_T *qi)
4996 {
4997     win_T	*qfwin = qf_find_win(qi);
4998     win_T	*llwin = NULL;
4999     win_T	*orig_wp = wp;
5000 
5001     if (qfwin != NULL)
5002     {
5003 	/* If the quickfix/location list window is open, then clear it */
5004 	if (qi->qf_curlist < qi->qf_listcount)
5005 	    qf_free(qi, qi->qf_curlist);
5006 	qf_update_buffer(qi, NULL);
5007     }
5008 
5009     if (wp != NULL && IS_LL_WINDOW(wp))
5010     {
5011 	/* If in the location list window, then use the non-location list
5012 	 * window with this location list (if present)
5013 	 */
5014 	llwin = find_win_with_ll(qi);
5015 	if (llwin != NULL)
5016 	    wp = llwin;
5017     }
5018 
5019     qf_free_all(wp);
5020     if (wp == NULL)
5021     {
5022 	/* quickfix list */
5023 	qi->qf_curlist = 0;
5024 	qi->qf_listcount = 0;
5025     }
5026     else if (IS_LL_WINDOW(orig_wp))
5027     {
5028 	/* If the location list window is open, then create a new empty
5029 	 * location list */
5030 	qf_info_T *new_ll = ll_new_list();
5031 
5032 	/* first free the list reference in the location list window */
5033 	ll_free_all(&orig_wp->w_llist_ref);
5034 
5035 	orig_wp->w_llist_ref = new_ll;
5036 	if (llwin != NULL)
5037 	{
5038 	    llwin->w_llist = new_ll;
5039 	    new_ll->qf_refcount++;
5040 	}
5041     }
5042 }
5043 
5044 /*
5045  * Populate the quickfix list with the items supplied in the list
5046  * of dictionaries. "title" will be copied to w:quickfix_title.
5047  * "action" is 'a' for add, 'r' for replace.  Otherwise create a new list.
5048  */
5049     int
5050 set_errorlist(
5051 	win_T	*wp,
5052 	list_T	*list,
5053 	int	action,
5054 	char_u	*title,
5055 	dict_T	*what)
5056 {
5057     qf_info_T	*qi = &ql_info;
5058     int		retval = OK;
5059 
5060     if (wp != NULL)
5061     {
5062 	qi = ll_get_or_alloc_list(wp);
5063 	if (qi == NULL)
5064 	    return FAIL;
5065     }
5066 
5067     if (action == 'f')
5068     {
5069 	/* Free the entire quickfix or location list stack */
5070 	qf_free_stack(wp, qi);
5071     }
5072     else if (what != NULL)
5073 	retval = qf_set_properties(qi, what, action);
5074     else
5075 	retval = qf_add_entries(qi, qi->qf_curlist, list, title, action);
5076 
5077     return retval;
5078 }
5079 
5080     static int
5081 mark_quickfix_ctx(qf_info_T *qi, int copyID)
5082 {
5083     int		i;
5084     int		abort = FALSE;
5085     typval_T	*ctx;
5086 
5087     for (i = 0; i < LISTCOUNT && !abort; ++i)
5088     {
5089 	ctx = qi->qf_lists[i].qf_ctx;
5090 	if (ctx != NULL && ctx->v_type != VAR_NUMBER &&
5091 		ctx->v_type != VAR_STRING && ctx->v_type != VAR_FLOAT)
5092 	    abort = set_ref_in_item(ctx, copyID, NULL, NULL);
5093     }
5094 
5095     return abort;
5096 }
5097 
5098 /*
5099  * Mark the context of the quickfix list and the location lists (if present) as
5100  * "in use". So that garabage collection doesn't free the context.
5101  */
5102     int
5103 set_ref_in_quickfix(int copyID)
5104 {
5105     int		abort = FALSE;
5106     tabpage_T	*tp;
5107     win_T	*win;
5108 
5109     abort = mark_quickfix_ctx(&ql_info, copyID);
5110     if (abort)
5111 	return abort;
5112 
5113     FOR_ALL_TAB_WINDOWS(tp, win)
5114     {
5115 	if (win->w_llist != NULL)
5116 	{
5117 	    abort = mark_quickfix_ctx(win->w_llist, copyID);
5118 	    if (abort)
5119 		return abort;
5120 	}
5121     }
5122 
5123     return abort;
5124 }
5125 #endif
5126 
5127 /*
5128  * ":[range]cbuffer [bufnr]" command.
5129  * ":[range]caddbuffer [bufnr]" command.
5130  * ":[range]cgetbuffer [bufnr]" command.
5131  * ":[range]lbuffer [bufnr]" command.
5132  * ":[range]laddbuffer [bufnr]" command.
5133  * ":[range]lgetbuffer [bufnr]" command.
5134  */
5135     void
5136 ex_cbuffer(exarg_T *eap)
5137 {
5138     buf_T	*buf = NULL;
5139     qf_info_T	*qi = &ql_info;
5140 #ifdef FEAT_AUTOCMD
5141     char_u	*au_name = NULL;
5142 #endif
5143 
5144     if (eap->cmdidx == CMD_lbuffer || eap->cmdidx == CMD_lgetbuffer
5145 	    || eap->cmdidx == CMD_laddbuffer)
5146     {
5147 	qi = ll_get_or_alloc_list(curwin);
5148 	if (qi == NULL)
5149 	    return;
5150     }
5151 
5152 #ifdef FEAT_AUTOCMD
5153     switch (eap->cmdidx)
5154     {
5155 	case CMD_cbuffer:	au_name = (char_u *)"cbuffer"; break;
5156 	case CMD_cgetbuffer:	au_name = (char_u *)"cgetbuffer"; break;
5157 	case CMD_caddbuffer:	au_name = (char_u *)"caddbuffer"; break;
5158 	case CMD_lbuffer:	au_name = (char_u *)"lbuffer"; break;
5159 	case CMD_lgetbuffer:	au_name = (char_u *)"lgetbuffer"; break;
5160 	case CMD_laddbuffer:	au_name = (char_u *)"laddbuffer"; break;
5161 	default: break;
5162     }
5163     if (au_name != NULL && apply_autocmds(EVENT_QUICKFIXCMDPRE, au_name,
5164 					       curbuf->b_fname, TRUE, curbuf))
5165     {
5166 # ifdef FEAT_EVAL
5167 	if (aborting())
5168 	    return;
5169 # endif
5170     }
5171 #endif
5172 
5173     if (*eap->arg == NUL)
5174 	buf = curbuf;
5175     else if (*skipwhite(skipdigits(eap->arg)) == NUL)
5176 	buf = buflist_findnr(atoi((char *)eap->arg));
5177     if (buf == NULL)
5178 	EMSG(_(e_invarg));
5179     else if (buf->b_ml.ml_mfp == NULL)
5180 	EMSG(_("E681: Buffer is not loaded"));
5181     else
5182     {
5183 	if (eap->addr_count == 0)
5184 	{
5185 	    eap->line1 = 1;
5186 	    eap->line2 = buf->b_ml.ml_line_count;
5187 	}
5188 	if (eap->line1 < 1 || eap->line1 > buf->b_ml.ml_line_count
5189 		|| eap->line2 < 1 || eap->line2 > buf->b_ml.ml_line_count)
5190 	    EMSG(_(e_invrange));
5191 	else
5192 	{
5193 	    char_u *qf_title = *eap->cmdlinep;
5194 
5195 	    if (buf->b_sfname)
5196 	    {
5197 		vim_snprintf((char *)IObuff, IOSIZE, "%s (%s)",
5198 				     (char *)qf_title, (char *)buf->b_sfname);
5199 		qf_title = IObuff;
5200 	    }
5201 
5202 	    if (qf_init_ext(qi, qi->qf_curlist, NULL, buf, NULL, p_efm,
5203 			    (eap->cmdidx != CMD_caddbuffer
5204 			     && eap->cmdidx != CMD_laddbuffer),
5205 						   eap->line1, eap->line2,
5206 						   qf_title, NULL) > 0)
5207 	    {
5208 #ifdef FEAT_AUTOCMD
5209 		if (au_name != NULL)
5210 		    apply_autocmds(EVENT_QUICKFIXCMDPOST, au_name,
5211 			    curbuf->b_fname, TRUE, curbuf);
5212 #endif
5213 		if (eap->cmdidx == CMD_cbuffer || eap->cmdidx == CMD_lbuffer)
5214 		    qf_jump(qi, 0, 0, eap->forceit);  /* display first error */
5215 	    }
5216 	}
5217     }
5218 }
5219 
5220 #if defined(FEAT_EVAL) || defined(PROTO)
5221 /*
5222  * ":cexpr {expr}", ":cgetexpr {expr}", ":caddexpr {expr}" command.
5223  * ":lexpr {expr}", ":lgetexpr {expr}", ":laddexpr {expr}" command.
5224  */
5225     void
5226 ex_cexpr(exarg_T *eap)
5227 {
5228     typval_T	*tv;
5229     qf_info_T	*qi = &ql_info;
5230 #ifdef FEAT_AUTOCMD
5231     char_u	*au_name = NULL;
5232 #endif
5233 
5234     if (eap->cmdidx == CMD_lexpr || eap->cmdidx == CMD_lgetexpr
5235 	    || eap->cmdidx == CMD_laddexpr)
5236     {
5237 	qi = ll_get_or_alloc_list(curwin);
5238 	if (qi == NULL)
5239 	    return;
5240     }
5241 
5242 #ifdef FEAT_AUTOCMD
5243     switch (eap->cmdidx)
5244     {
5245 	case CMD_cexpr:	    au_name = (char_u *)"cexpr"; break;
5246 	case CMD_cgetexpr:  au_name = (char_u *)"cgetexpr"; break;
5247 	case CMD_caddexpr:  au_name = (char_u *)"caddexpr"; break;
5248 	case CMD_lexpr:	    au_name = (char_u *)"lexpr"; break;
5249 	case CMD_lgetexpr:  au_name = (char_u *)"lgetexpr"; break;
5250 	case CMD_laddexpr:  au_name = (char_u *)"laddexpr"; break;
5251 	default: break;
5252     }
5253     if (au_name != NULL && apply_autocmds(EVENT_QUICKFIXCMDPRE, au_name,
5254 					       curbuf->b_fname, TRUE, curbuf))
5255     {
5256 # ifdef FEAT_EVAL
5257 	if (aborting())
5258 	    return;
5259 # endif
5260     }
5261 #endif
5262 
5263     /* Evaluate the expression.  When the result is a string or a list we can
5264      * use it to fill the errorlist. */
5265     tv = eval_expr(eap->arg, NULL);
5266     if (tv != NULL)
5267     {
5268 	if ((tv->v_type == VAR_STRING && tv->vval.v_string != NULL)
5269 		|| (tv->v_type == VAR_LIST && tv->vval.v_list != NULL))
5270 	{
5271 	    if (qf_init_ext(qi, qi->qf_curlist, NULL, NULL, tv, p_efm,
5272 			    (eap->cmdidx != CMD_caddexpr
5273 			     && eap->cmdidx != CMD_laddexpr),
5274 				 (linenr_T)0, (linenr_T)0, *eap->cmdlinep,
5275 				 NULL) > 0)
5276 	    {
5277 #ifdef FEAT_AUTOCMD
5278 		if (au_name != NULL)
5279 		    apply_autocmds(EVENT_QUICKFIXCMDPOST, au_name,
5280 			    curbuf->b_fname, TRUE, curbuf);
5281 #endif
5282 		if (eap->cmdidx == CMD_cexpr || eap->cmdidx == CMD_lexpr)
5283 		    qf_jump(qi, 0, 0, eap->forceit);  /* display first error */
5284 	    }
5285 	}
5286 	else
5287 	    EMSG(_("E777: String or List expected"));
5288 	free_tv(tv);
5289     }
5290 }
5291 #endif
5292 
5293 /*
5294  * ":helpgrep {pattern}"
5295  */
5296     void
5297 ex_helpgrep(exarg_T *eap)
5298 {
5299     regmatch_T	regmatch;
5300     char_u	*save_cpo;
5301     char_u	*p;
5302     int		fcount;
5303     char_u	**fnames;
5304     FILE	*fd;
5305     int		fi;
5306     long	lnum;
5307 #ifdef FEAT_MULTI_LANG
5308     char_u	*lang;
5309 #endif
5310     qf_info_T	*qi = &ql_info;
5311     qf_info_T	*save_qi;
5312     int		new_qi = FALSE;
5313     win_T	*wp;
5314 #ifdef FEAT_AUTOCMD
5315     char_u	*au_name =  NULL;
5316 #endif
5317 
5318 #ifdef FEAT_MULTI_LANG
5319     /* Check for a specified language */
5320     lang = check_help_lang(eap->arg);
5321 #endif
5322 
5323 #ifdef FEAT_AUTOCMD
5324     switch (eap->cmdidx)
5325     {
5326 	case CMD_helpgrep:  au_name = (char_u *)"helpgrep"; break;
5327 	case CMD_lhelpgrep: au_name = (char_u *)"lhelpgrep"; break;
5328 	default: break;
5329     }
5330     if (au_name != NULL && apply_autocmds(EVENT_QUICKFIXCMDPRE, au_name,
5331 					       curbuf->b_fname, TRUE, curbuf))
5332     {
5333 # ifdef FEAT_EVAL
5334 	if (aborting())
5335 	    return;
5336 # endif
5337     }
5338 #endif
5339 
5340     /* Make 'cpoptions' empty, the 'l' flag should not be used here. */
5341     save_cpo = p_cpo;
5342     p_cpo = empty_option;
5343 
5344     if (eap->cmdidx == CMD_lhelpgrep)
5345     {
5346 	/* If the current window is a help window, then use it */
5347 	if (bt_help(curwin->w_buffer))
5348 	    wp = curwin;
5349 	else
5350 	    /* Find an existing help window */
5351 	    FOR_ALL_WINDOWS(wp)
5352 		if (bt_help(wp->w_buffer))
5353 		    break;
5354 
5355 	if (wp == NULL)	    /* Help window not found */
5356 	    qi = NULL;
5357 	else
5358 	    qi = wp->w_llist;
5359 
5360 	if (qi == NULL)
5361 	{
5362 	    /* Allocate a new location list for help text matches */
5363 	    if ((qi = ll_new_list()) == NULL)
5364 		return;
5365 	    new_qi = TRUE;
5366 	}
5367     }
5368 
5369     /* Autocommands may change the list. Save it for later comparison */
5370     save_qi = qi;
5371 
5372     regmatch.regprog = vim_regcomp(eap->arg, RE_MAGIC + RE_STRING);
5373     regmatch.rm_ic = FALSE;
5374     if (regmatch.regprog != NULL)
5375     {
5376 #ifdef FEAT_MBYTE
5377 	vimconv_T vc;
5378 
5379 	/* Help files are in utf-8 or latin1, convert lines when 'encoding'
5380 	 * differs. */
5381 	vc.vc_type = CONV_NONE;
5382 	if (!enc_utf8)
5383 	    convert_setup(&vc, (char_u *)"utf-8", p_enc);
5384 #endif
5385 
5386 	/* create a new quickfix list */
5387 	qf_new_list(qi, *eap->cmdlinep);
5388 
5389 	/* Go through all directories in 'runtimepath' */
5390 	p = p_rtp;
5391 	while (*p != NUL && !got_int)
5392 	{
5393 	    copy_option_part(&p, NameBuff, MAXPATHL, ",");
5394 
5395 	    /* Find all "*.txt" and "*.??x" files in the "doc" directory. */
5396 	    add_pathsep(NameBuff);
5397 	    STRCAT(NameBuff, "doc/*.\\(txt\\|??x\\)");
5398 	    if (gen_expand_wildcards(1, &NameBuff, &fcount,
5399 					     &fnames, EW_FILE|EW_SILENT) == OK
5400 		    && fcount > 0)
5401 	    {
5402 		for (fi = 0; fi < fcount && !got_int; ++fi)
5403 		{
5404 #ifdef FEAT_MULTI_LANG
5405 		    /* Skip files for a different language. */
5406 		    if (lang != NULL
5407 			    && STRNICMP(lang, fnames[fi]
5408 					    + STRLEN(fnames[fi]) - 3, 2) != 0
5409 			    && !(STRNICMP(lang, "en", 2) == 0
5410 				&& STRNICMP("txt", fnames[fi]
5411 					   + STRLEN(fnames[fi]) - 3, 3) == 0))
5412 			    continue;
5413 #endif
5414 		    fd = mch_fopen((char *)fnames[fi], "r");
5415 		    if (fd != NULL)
5416 		    {
5417 			lnum = 1;
5418 			while (!vim_fgets(IObuff, IOSIZE, fd) && !got_int)
5419 			{
5420 			    char_u    *line = IObuff;
5421 #ifdef FEAT_MBYTE
5422 			    /* Convert a line if 'encoding' is not utf-8 and
5423 			     * the line contains a non-ASCII character. */
5424 			    if (vc.vc_type != CONV_NONE
5425 						   && has_non_ascii(IObuff))
5426 			    {
5427 				line = string_convert(&vc, IObuff, NULL);
5428 				if (line == NULL)
5429 				    line = IObuff;
5430 			    }
5431 #endif
5432 
5433 			    if (vim_regexec(&regmatch, line, (colnr_T)0))
5434 			    {
5435 				int	l = (int)STRLEN(line);
5436 
5437 				/* remove trailing CR, LF, spaces, etc. */
5438 				while (l > 0 && line[l - 1] <= ' ')
5439 				     line[--l] = NUL;
5440 
5441 				if (qf_add_entry(qi,
5442 					    qi->qf_curlist,
5443 					    NULL,	/* dir */
5444 					    fnames[fi],
5445 					    0,
5446 					    line,
5447 					    lnum,
5448 					    (int)(regmatch.startp[0] - line)
5449 								+ 1, /* col */
5450 					    FALSE,	/* vis_col */
5451 					    NULL,	/* search pattern */
5452 					    0,		/* nr */
5453 					    1,		/* type */
5454 					    TRUE	/* valid */
5455 					    ) == FAIL)
5456 				{
5457 				    got_int = TRUE;
5458 #ifdef FEAT_MBYTE
5459 				    if (line != IObuff)
5460 					vim_free(line);
5461 #endif
5462 				    break;
5463 				}
5464 			    }
5465 #ifdef FEAT_MBYTE
5466 			    if (line != IObuff)
5467 				vim_free(line);
5468 #endif
5469 			    ++lnum;
5470 			    line_breakcheck();
5471 			}
5472 			fclose(fd);
5473 		    }
5474 		}
5475 		FreeWild(fcount, fnames);
5476 	    }
5477 	}
5478 
5479 	vim_regfree(regmatch.regprog);
5480 #ifdef FEAT_MBYTE
5481 	if (vc.vc_type != CONV_NONE)
5482 	    convert_setup(&vc, NULL, NULL);
5483 #endif
5484 
5485 	qi->qf_lists[qi->qf_curlist].qf_nonevalid = FALSE;
5486 	qi->qf_lists[qi->qf_curlist].qf_ptr =
5487 	    qi->qf_lists[qi->qf_curlist].qf_start;
5488 	qi->qf_lists[qi->qf_curlist].qf_index = 1;
5489     }
5490 
5491     if (p_cpo == empty_option)
5492 	p_cpo = save_cpo;
5493     else
5494 	/* Darn, some plugin changed the value. */
5495 	free_string_option(save_cpo);
5496 
5497 #ifdef FEAT_WINDOWS
5498     qf_update_buffer(qi, NULL);
5499 #endif
5500 
5501 #ifdef FEAT_AUTOCMD
5502     if (au_name != NULL)
5503     {
5504 	apply_autocmds(EVENT_QUICKFIXCMDPOST, au_name,
5505 					       curbuf->b_fname, TRUE, curbuf);
5506 	if (!new_qi && qi != save_qi && qf_find_buf(qi) == NULL)
5507 	    /* autocommands made "qi" invalid */
5508 	    return;
5509     }
5510 #endif
5511 
5512     /* Jump to first match. */
5513     if (qi->qf_lists[qi->qf_curlist].qf_count > 0)
5514 	qf_jump(qi, 0, 0, FALSE);
5515     else
5516 	EMSG2(_(e_nomatch2), eap->arg);
5517 
5518     if (eap->cmdidx == CMD_lhelpgrep)
5519     {
5520 	/* If the help window is not opened or if it already points to the
5521 	 * correct location list, then free the new location list. */
5522 	if (!bt_help(curwin->w_buffer) || curwin->w_llist == qi)
5523 	{
5524 	    if (new_qi)
5525 		ll_free_all(&qi);
5526 	}
5527 	else if (curwin->w_llist == NULL)
5528 	    curwin->w_llist = qi;
5529     }
5530 }
5531 
5532 #endif /* FEAT_QUICKFIX */
5533