xref: /vim-8.2.3635/src/quickfix.c (revision 383aa84c)
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 typedef struct qf_list_S
51 {
52     qfline_T	*qf_start;	/* pointer to the first error */
53     qfline_T	*qf_last;	/* pointer to the last error */
54     qfline_T	*qf_ptr;	/* pointer to the current error */
55     int		qf_count;	/* number of errors (0 means no error list) */
56     int		qf_index;	/* current index in the error list */
57     int		qf_nonevalid;	/* TRUE if not a single valid entry found */
58     char_u	*qf_title;	/* title derived from the command that created
59 				 * the error list */
60     typval_T	*qf_ctx;	/* context set by setqflist/setloclist */
61 } qf_list_T;
62 
63 struct qf_info_S
64 {
65     /*
66      * Count of references to this list. Used only for location lists.
67      * When a location list window reference this list, qf_refcount
68      * will be 2. Otherwise, qf_refcount will be 1. When qf_refcount
69      * reaches 0, the list is freed.
70      */
71     int		qf_refcount;
72     int		qf_listcount;	    /* current number of lists */
73     int		qf_curlist;	    /* current error list */
74     qf_list_T	qf_lists[LISTCOUNT];
75 
76     int			  qf_dir_curlist;    /* error list for qf_dir_stack */
77     struct dir_stack_T   *qf_dir_stack;
78     char_u		 *qf_directory;
79     struct dir_stack_T   *qf_file_stack;
80     char_u		 *qf_currfile;
81     int			  qf_multiline;
82     int			  qf_multiignore;
83     int			  qf_multiscan;
84 };
85 
86 static qf_info_T ql_info;	/* global quickfix list */
87 
88 #define FMT_PATTERNS 10		/* maximum number of % recognized */
89 
90 /*
91  * Structure used to hold the info of one part of 'errorformat'
92  */
93 typedef struct efm_S efm_T;
94 struct efm_S
95 {
96     regprog_T	    *prog;	/* pre-formatted part of 'errorformat' */
97     efm_T	    *next;	/* pointer to next (NULL if last) */
98     char_u	    addr[FMT_PATTERNS]; /* indices of used % patterns */
99     char_u	    prefix;	/* prefix of this format line: */
100 				/*   'D' enter directory */
101 				/*   'X' leave directory */
102 				/*   'A' start of multi-line message */
103 				/*   'E' error message */
104 				/*   'W' warning message */
105 				/*   'I' informational message */
106 				/*   'C' continuation line */
107 				/*   'Z' end of multi-line message */
108 				/*   'G' general, unspecific message */
109 				/*   'P' push file (partial) message */
110 				/*   'Q' pop/quit file (partial) message */
111 				/*   'O' overread (partial) message */
112     char_u	    flags;	/* additional flags given in prefix */
113 				/*   '-' do not include this line */
114 				/*   '+' include whole line in message */
115     int		    conthere;	/* %> used */
116 };
117 
118 static efm_T	*fmt_start = NULL; /* cached across qf_parse_line() calls */
119 
120 static int	qf_init_ext(qf_info_T *qi, 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);
121 static void	qf_store_title(qf_info_T *qi, int qf_idx, char_u *title);
122 static void	qf_new_list(qf_info_T *qi, char_u *qf_title);
123 static void	ll_free_all(qf_info_T **pqi);
124 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);
125 static qf_info_T *ll_new_list(void);
126 static void	qf_free(qf_info_T *qi, int idx);
127 static char_u	*qf_types(int, int);
128 static int	qf_get_fnum(qf_info_T *qi, char_u *, char_u *);
129 static char_u	*qf_push_dir(char_u *, struct dir_stack_T **, int is_file_stack);
130 static char_u	*qf_pop_dir(struct dir_stack_T **);
131 static char_u	*qf_guess_filepath(qf_info_T *qi, char_u *);
132 static void	qf_fmt_text(char_u *text, char_u *buf, int bufsize);
133 static void	qf_clean_dir_stack(struct dir_stack_T **);
134 #ifdef FEAT_WINDOWS
135 static int	qf_win_pos_update(qf_info_T *qi, int old_qf_index);
136 static int	is_qf_win(win_T *win, qf_info_T *qi);
137 static win_T	*qf_find_win(qf_info_T *qi);
138 static buf_T	*qf_find_buf(qf_info_T *qi);
139 static void	qf_update_buffer(qf_info_T *qi, qfline_T *old_last);
140 static void	qf_set_title_var(qf_info_T *qi);
141 static void	qf_fill_buffer(qf_info_T *qi, buf_T *buf, qfline_T *old_last);
142 #endif
143 static char_u	*get_mef_name(void);
144 static void	restore_start_dir(char_u *dirname_start);
145 static buf_T	*load_dummy_buffer(char_u *fname, char_u *dirname_start, char_u *resulting_dir);
146 static void	wipe_dummy_buffer(buf_T *buf, char_u *dirname_start);
147 static void	unload_dummy_buffer(buf_T *buf, char_u *dirname_start);
148 static qf_info_T *ll_get_or_alloc_list(win_T *);
149 
150 /* Quickfix window check helper macro */
151 #define IS_QF_WINDOW(wp) (bt_quickfix(wp->w_buffer) && wp->w_llist_ref == NULL)
152 /* Location list window check helper macro */
153 #define IS_LL_WINDOW(wp) (bt_quickfix(wp->w_buffer) && wp->w_llist_ref != NULL)
154 /*
155  * Return location list for window 'wp'
156  * For location list window, return the referenced location list
157  */
158 #define GET_LOC_LIST(wp) (IS_LL_WINDOW(wp) ? wp->w_llist_ref : wp->w_llist)
159 
160 /*
161  * Looking up a buffer can be slow if there are many.  Remember the last one
162  * to make this a lot faster if there are multiple matches in the same file.
163  */
164 static char_u   *qf_last_bufname = NULL;
165 static bufref_T  qf_last_bufref = {NULL, 0, 0};
166 
167 /*
168  * Read the errorfile "efile" into memory, line by line, building the error
169  * list. Set the error list's title to qf_title.
170  * Return -1 for error, number of errors for success.
171  */
172     int
173 qf_init(
174     win_T	    *wp,
175     char_u	    *efile,
176     char_u	    *errorformat,
177     int		    newlist,		/* TRUE: start a new error list */
178     char_u	    *qf_title,
179     char_u	    *enc)
180 {
181     qf_info_T	    *qi = &ql_info;
182 
183     if (wp != NULL)
184     {
185 	qi = ll_get_or_alloc_list(wp);
186 	if (qi == NULL)
187 	    return FAIL;
188     }
189 
190     return qf_init_ext(qi, efile, curbuf, NULL, errorformat, newlist,
191 						    (linenr_T)0, (linenr_T)0,
192 						    qf_title, enc);
193 }
194 
195 /*
196  * Maximum number of bytes allowed per line while reading a errorfile.
197  */
198 #define LINE_MAXLEN 4096
199 
200 static struct fmtpattern
201 {
202     char_u	convchar;
203     char	*pattern;
204 } fmt_pat[FMT_PATTERNS] =
205 		{
206 		    {'f', ".\\+"},	    /* only used when at end */
207 		    {'n', "\\d\\+"},
208 		    {'l', "\\d\\+"},
209 		    {'c', "\\d\\+"},
210 		    {'t', "."},
211 		    {'m', ".\\+"},
212 		    {'r', ".*"},
213 		    {'p', "[- 	.]*"},
214 		    {'v', "\\d\\+"},
215 		    {'s', ".\\+"}
216 		};
217 
218 /*
219  * Converts a 'errorformat' string to regular expression pattern
220  */
221     static int
222 efm_to_regpat(
223     char_u	*efm,
224     int		len,
225     efm_T	*fmt_ptr,
226     char_u	*regpat,
227     char_u	*errmsg)
228 {
229     char_u	*ptr;
230     char_u	*efmp;
231     char_u	*srcptr;
232     int		round;
233     int		idx = 0;
234 
235     /*
236      * Build regexp pattern from current 'errorformat' option
237      */
238     ptr = regpat;
239     *ptr++ = '^';
240     round = 0;
241     for (efmp = efm; efmp < efm + len; ++efmp)
242     {
243 	if (*efmp == '%')
244 	{
245 	    ++efmp;
246 	    for (idx = 0; idx < FMT_PATTERNS; ++idx)
247 		if (fmt_pat[idx].convchar == *efmp)
248 		    break;
249 	    if (idx < FMT_PATTERNS)
250 	    {
251 		if (fmt_ptr->addr[idx])
252 		{
253 		    sprintf((char *)errmsg,
254 			    _("E372: Too many %%%c in format string"), *efmp);
255 		    EMSG(errmsg);
256 		    return -1;
257 		}
258 		if ((idx
259 			    && idx < 6
260 			    && vim_strchr((char_u *)"DXOPQ",
261 				fmt_ptr->prefix) != NULL)
262 			|| (idx == 6
263 			    && vim_strchr((char_u *)"OPQ",
264 				fmt_ptr->prefix) == NULL))
265 		{
266 		    sprintf((char *)errmsg,
267 			    _("E373: Unexpected %%%c in format string"), *efmp);
268 		    EMSG(errmsg);
269 		    return -1;
270 		}
271 		fmt_ptr->addr[idx] = (char_u)++round;
272 		*ptr++ = '\\';
273 		*ptr++ = '(';
274 #ifdef BACKSLASH_IN_FILENAME
275 		if (*efmp == 'f')
276 		{
277 		    /* Also match "c:" in the file name, even when
278 		     * checking for a colon next: "%f:".
279 		     * "\%(\a:\)\=" */
280 		    STRCPY(ptr, "\\%(\\a:\\)\\=");
281 		    ptr += 10;
282 		}
283 #endif
284 		if (*efmp == 'f' && efmp[1] != NUL)
285 		{
286 		    if (efmp[1] != '\\' && efmp[1] != '%')
287 		    {
288 			/* A file name may contain spaces, but this isn't
289 			 * in "\f".  For "%f:%l:%m" there may be a ":" in
290 			 * the file name.  Use ".\{-1,}x" instead (x is
291 			 * the next character), the requirement that :999:
292 			 * follows should work. */
293 			STRCPY(ptr, ".\\{-1,}");
294 			ptr += 7;
295 		    }
296 		    else
297 		    {
298 			/* File name followed by '\\' or '%': include as
299 			 * many file name chars as possible. */
300 			STRCPY(ptr, "\\f\\+");
301 			ptr += 4;
302 		    }
303 		}
304 		else
305 		{
306 		    srcptr = (char_u *)fmt_pat[idx].pattern;
307 		    while ((*ptr = *srcptr++) != NUL)
308 			++ptr;
309 		}
310 		*ptr++ = '\\';
311 		*ptr++ = ')';
312 	    }
313 	    else if (*efmp == '*')
314 	    {
315 		if (*++efmp == '[' || *efmp == '\\')
316 		{
317 		    if ((*ptr++ = *efmp) == '[')	/* %*[^a-z0-9] etc. */
318 		    {
319 			if (efmp[1] == '^')
320 			    *ptr++ = *++efmp;
321 			if (efmp < efm + len)
322 			{
323 			    *ptr++ = *++efmp;	    /* could be ']' */
324 			    while (efmp < efm + len
325 				    && (*ptr++ = *++efmp) != ']')
326 				/* skip */;
327 			    if (efmp == efm + len)
328 			    {
329 				EMSG(_("E374: Missing ] in format string"));
330 				return -1;
331 			    }
332 			}
333 		    }
334 		    else if (efmp < efm + len)	/* %*\D, %*\s etc. */
335 			*ptr++ = *++efmp;
336 		    *ptr++ = '\\';
337 		    *ptr++ = '+';
338 		}
339 		else
340 		{
341 		    /* TODO: scanf()-like: %*ud, %*3c, %*f, ... ? */
342 		    sprintf((char *)errmsg,
343 			    _("E375: Unsupported %%%c in format string"), *efmp);
344 		    EMSG(errmsg);
345 		    return -1;
346 		}
347 	    }
348 	    else if (vim_strchr((char_u *)"%\\.^$~[", *efmp) != NULL)
349 		*ptr++ = *efmp;		/* regexp magic characters */
350 	    else if (*efmp == '#')
351 		*ptr++ = '*';
352 	    else if (*efmp == '>')
353 		fmt_ptr->conthere = TRUE;
354 	    else if (efmp == efm + 1)		/* analyse prefix */
355 	    {
356 		if (vim_strchr((char_u *)"+-", *efmp) != NULL)
357 		    fmt_ptr->flags = *efmp++;
358 		if (vim_strchr((char_u *)"DXAEWICZGOPQ", *efmp) != NULL)
359 		    fmt_ptr->prefix = *efmp;
360 		else
361 		{
362 		    sprintf((char *)errmsg,
363 			    _("E376: Invalid %%%c in format string prefix"), *efmp);
364 		    EMSG(errmsg);
365 		    return -1;
366 		}
367 	    }
368 	    else
369 	    {
370 		sprintf((char *)errmsg,
371 			_("E377: Invalid %%%c in format string"), *efmp);
372 		EMSG(errmsg);
373 		return -1;
374 	    }
375 	}
376 	else			/* copy normal character */
377 	{
378 	    if (*efmp == '\\' && efmp + 1 < efm + len)
379 		++efmp;
380 	    else if (vim_strchr((char_u *)".*^$~[", *efmp) != NULL)
381 		*ptr++ = '\\';	/* escape regexp atoms */
382 	    if (*efmp)
383 		*ptr++ = *efmp;
384 	}
385     }
386     *ptr++ = '$';
387     *ptr = NUL;
388 
389     return 0;
390 }
391 
392     static void
393 free_efm_list(efm_T **efm_first)
394 {
395     efm_T *efm_ptr;
396 
397     for (efm_ptr = *efm_first; efm_ptr != NULL; efm_ptr = *efm_first)
398     {
399 	*efm_first = efm_ptr->next;
400 	vim_regfree(efm_ptr->prog);
401 	vim_free(efm_ptr);
402     }
403     fmt_start = NULL;
404 }
405 
406 /* Parse 'errorformat' option */
407     static efm_T *
408 parse_efm_option(char_u *efm)
409 {
410     char_u	*errmsg = NULL;
411     int		errmsglen;
412     efm_T	*fmt_ptr = NULL;
413     efm_T	*fmt_first = NULL;
414     efm_T	*fmt_last = NULL;
415     char_u	*fmtstr = NULL;
416     int		len;
417     int		i;
418     int		round;
419 
420     errmsglen = CMDBUFFSIZE + 1;
421     errmsg = alloc_id(errmsglen, aid_qf_errmsg);
422     if (errmsg == NULL)
423 	goto parse_efm_end;
424 
425     /*
426      * Each part of the format string is copied and modified from errorformat
427      * to regex prog.  Only a few % characters are allowed.
428      */
429 
430     /*
431      * Get some space to modify the format string into.
432      */
433     i = (FMT_PATTERNS * 3) + ((int)STRLEN(efm) << 2);
434     for (round = FMT_PATTERNS; round > 0; )
435 	i += (int)STRLEN(fmt_pat[--round].pattern);
436 #ifdef COLON_IN_FILENAME
437     i += 12; /* "%f" can become twelve chars longer */
438 #else
439     i += 2; /* "%f" can become two chars longer */
440 #endif
441     if ((fmtstr = alloc(i)) == NULL)
442 	goto parse_efm_error;
443 
444     while (efm[0] != NUL)
445     {
446 	/*
447 	 * Allocate a new eformat structure and put it at the end of the list
448 	 */
449 	fmt_ptr = (efm_T *)alloc_clear((unsigned)sizeof(efm_T));
450 	if (fmt_ptr == NULL)
451 	    goto parse_efm_error;
452 	if (fmt_first == NULL)	    /* first one */
453 	    fmt_first = fmt_ptr;
454 	else
455 	    fmt_last->next = fmt_ptr;
456 	fmt_last = fmt_ptr;
457 
458 	/*
459 	 * Isolate one part in the 'errorformat' option
460 	 */
461 	for (len = 0; efm[len] != NUL && efm[len] != ','; ++len)
462 	    if (efm[len] == '\\' && efm[len + 1] != NUL)
463 		++len;
464 
465 	if (efm_to_regpat(efm, len, fmt_ptr, fmtstr, errmsg) == -1)
466 	    goto parse_efm_error;
467 	if ((fmt_ptr->prog = vim_regcomp(fmtstr, RE_MAGIC + RE_STRING)) == NULL)
468 	    goto parse_efm_error;
469 	/*
470 	 * Advance to next part
471 	 */
472 	efm = skip_to_option_part(efm + len);	/* skip comma and spaces */
473     }
474 
475     if (fmt_first == NULL)	/* nothing found */
476 	EMSG(_("E378: 'errorformat' contains no pattern"));
477 
478     goto parse_efm_end;
479 
480 parse_efm_error:
481     free_efm_list(&fmt_first);
482 
483 parse_efm_end:
484     vim_free(fmtstr);
485     vim_free(errmsg);
486 
487     return fmt_first;
488 }
489 
490 enum {
491     QF_FAIL = 0,
492     QF_OK = 1,
493     QF_END_OF_INPUT = 2,
494     QF_NOMEM = 3,
495     QF_IGNORE_LINE = 4
496 };
497 
498 typedef struct {
499     char_u	*linebuf;
500     int		linelen;
501     char_u	*growbuf;
502     int		growbufsiz;
503     FILE	*fd;
504     typval_T	*tv;
505     char_u	*p_str;
506     listitem_T	*p_li;
507     buf_T	*buf;
508     linenr_T	buflnum;
509     linenr_T	lnumlast;
510     vimconv_T	vc;
511 } qfstate_T;
512 
513     static char_u *
514 qf_grow_linebuf(qfstate_T *state, int newsz)
515 {
516     /*
517      * If the line exceeds LINE_MAXLEN exclude the last
518      * byte since it's not a NL character.
519      */
520     state->linelen = newsz > LINE_MAXLEN ? LINE_MAXLEN - 1 : newsz;
521     if (state->growbuf == NULL)
522     {
523 	state->growbuf = alloc(state->linelen + 1);
524 	if (state->growbuf == NULL)
525 	    return NULL;
526 	state->growbufsiz = state->linelen;
527     }
528     else if (state->linelen > state->growbufsiz)
529     {
530 	state->growbuf = vim_realloc(state->growbuf, state->linelen + 1);
531 	if (state->growbuf == NULL)
532 	    return NULL;
533 	state->growbufsiz = state->linelen;
534     }
535     return state->growbuf;
536 }
537 
538 /*
539  * Get the next string (separated by newline) from state->p_str.
540  */
541     static int
542 qf_get_next_str_line(qfstate_T *state)
543 {
544     /* Get the next line from the supplied string */
545     char_u	*p_str = state->p_str;
546     char_u	*p;
547     int		len;
548 
549     if (*p_str == NUL) /* Reached the end of the string */
550 	return QF_END_OF_INPUT;
551 
552     p = vim_strchr(p_str, '\n');
553     if (p != NULL)
554 	len = (int)(p - p_str) + 1;
555     else
556 	len = (int)STRLEN(p_str);
557 
558     if (len > IOSIZE - 2)
559     {
560 	state->linebuf = qf_grow_linebuf(state, len);
561 	if (state->linebuf == NULL)
562 	    return QF_NOMEM;
563     }
564     else
565     {
566 	state->linebuf = IObuff;
567 	state->linelen = len;
568     }
569     vim_strncpy(state->linebuf, p_str, state->linelen);
570 
571     /*
572      * Increment using len in order to discard the rest of the
573      * line if it exceeds LINE_MAXLEN.
574      */
575     p_str += len;
576     state->p_str = p_str;
577 
578     return QF_OK;
579 }
580 
581 /*
582  * Get the next string from state->p_Li.
583  */
584     static int
585 qf_get_next_list_line(qfstate_T *state)
586 {
587     listitem_T	*p_li = state->p_li;
588     int		len;
589 
590     while (p_li != NULL
591 	    && (p_li->li_tv.v_type != VAR_STRING
592 		|| p_li->li_tv.vval.v_string == NULL))
593 	p_li = p_li->li_next;	/* Skip non-string items */
594 
595     if (p_li == NULL)		/* End of the list */
596     {
597 	state->p_li = NULL;
598 	return QF_END_OF_INPUT;
599     }
600 
601     len = (int)STRLEN(p_li->li_tv.vval.v_string);
602     if (len > IOSIZE - 2)
603     {
604 	state->linebuf = qf_grow_linebuf(state, len);
605 	if (state->linebuf == NULL)
606 	    return QF_NOMEM;
607     }
608     else
609     {
610 	state->linebuf = IObuff;
611 	state->linelen = len;
612     }
613 
614     vim_strncpy(state->linebuf, p_li->li_tv.vval.v_string, state->linelen);
615 
616     state->p_li = p_li->li_next;	/* next item */
617     return QF_OK;
618 }
619 
620 /*
621  * Get the next string from state->buf.
622  */
623     static int
624 qf_get_next_buf_line(qfstate_T *state)
625 {
626     char_u	*p_buf = NULL;
627     int		len;
628 
629     /* Get the next line from the supplied buffer */
630     if (state->buflnum > state->lnumlast)
631 	return QF_END_OF_INPUT;
632 
633     p_buf = ml_get_buf(state->buf, state->buflnum, FALSE);
634     state->buflnum += 1;
635 
636     len = (int)STRLEN(p_buf);
637     if (len > IOSIZE - 2)
638     {
639 	state->linebuf = qf_grow_linebuf(state, len);
640 	if (state->linebuf == NULL)
641 	    return QF_NOMEM;
642     }
643     else
644     {
645 	state->linebuf = IObuff;
646 	state->linelen = len;
647     }
648     vim_strncpy(state->linebuf, p_buf, state->linelen);
649 
650     return QF_OK;
651 }
652 
653 /*
654  * Get the next string from file state->fd.
655  */
656     static int
657 qf_get_next_file_line(qfstate_T *state)
658 {
659     int	    discard;
660     int	    growbuflen;
661 
662     if (fgets((char *)IObuff, IOSIZE, state->fd) == NULL)
663 	return QF_END_OF_INPUT;
664 
665     discard = FALSE;
666     state->linelen = (int)STRLEN(IObuff);
667     if (state->linelen == IOSIZE - 1 && !(IObuff[state->linelen - 1] == '\n'))
668     {
669 	/*
670 	 * The current line exceeds IObuff, continue reading using
671 	 * growbuf until EOL or LINE_MAXLEN bytes is read.
672 	 */
673 	if (state->growbuf == NULL)
674 	{
675 	    state->growbufsiz = 2 * (IOSIZE - 1);
676 	    state->growbuf = alloc(state->growbufsiz);
677 	    if (state->growbuf == NULL)
678 		return QF_NOMEM;
679 	}
680 
681 	/* Copy the read part of the line, excluding null-terminator */
682 	memcpy(state->growbuf, IObuff, IOSIZE - 1);
683 	growbuflen = state->linelen;
684 
685 	for (;;)
686 	{
687 	    if (fgets((char *)state->growbuf + growbuflen,
688 			state->growbufsiz - growbuflen, state->fd) == NULL)
689 		break;
690 	    state->linelen = (int)STRLEN(state->growbuf + growbuflen);
691 	    growbuflen += state->linelen;
692 	    if ((state->growbuf)[growbuflen - 1] == '\n')
693 		break;
694 	    if (state->growbufsiz == LINE_MAXLEN)
695 	    {
696 		discard = TRUE;
697 		break;
698 	    }
699 
700 	    state->growbufsiz = 2 * state->growbufsiz < LINE_MAXLEN
701 		? 2 * state->growbufsiz : LINE_MAXLEN;
702 	    state->growbuf = vim_realloc(state->growbuf, state->growbufsiz);
703 	    if (state->growbuf == NULL)
704 		return QF_NOMEM;
705 	}
706 
707 	while (discard)
708 	{
709 	    /*
710 	     * The current line is longer than LINE_MAXLEN, continue
711 	     * reading but discard everything until EOL or EOF is
712 	     * reached.
713 	     */
714 	    if (fgets((char *)IObuff, IOSIZE, state->fd) == NULL
715 		    || (int)STRLEN(IObuff) < IOSIZE - 1
716 		    || IObuff[IOSIZE - 1] == '\n')
717 		break;
718 	}
719 
720 	state->linebuf = state->growbuf;
721 	state->linelen = growbuflen;
722     }
723     else
724 	state->linebuf = IObuff;
725 
726 #ifdef FEAT_MBYTE
727     /* Convert a line if it contains a non-ASCII character. */
728     if (state->vc.vc_type != CONV_NONE && has_non_ascii(state->linebuf))
729     {
730 	char_u	*line;
731 
732 	line = string_convert(&state->vc, state->linebuf, &state->linelen);
733 	if (line != NULL)
734 	{
735 	    if (state->linelen < IOSIZE)
736 	    {
737 		STRCPY(state->linebuf, line);
738 		vim_free(line);
739 	    }
740 	    else
741 	    {
742 		vim_free(state->growbuf);
743 		state->linebuf = state->growbuf = line;
744 		state->growbufsiz = state->linelen < LINE_MAXLEN
745 						? state->linelen : LINE_MAXLEN;
746 	    }
747 	}
748     }
749 #endif
750 
751     return QF_OK;
752 }
753 
754 /*
755  * Get the next string from a file/buffer/list/string.
756  */
757     static int
758 qf_get_nextline(qfstate_T *state)
759 {
760     int status = QF_FAIL;
761 
762     if (state->fd == NULL)
763     {
764 	if (state->tv != NULL)
765 	{
766 	    if (state->tv->v_type == VAR_STRING)
767 		/* Get the next line from the supplied string */
768 		status = qf_get_next_str_line(state);
769 	    else if (state->tv->v_type == VAR_LIST)
770 		/* Get the next line from the supplied list */
771 		status = qf_get_next_list_line(state);
772 	}
773 	else
774 	    /* Get the next line from the supplied buffer */
775 	    status = qf_get_next_buf_line(state);
776     }
777     else
778 	/* Get the next line from the supplied file */
779 	status = qf_get_next_file_line(state);
780 
781     if (status != QF_OK)
782 	return status;
783 
784     /* remove newline/CR from the line */
785     if (state->linelen > 0 && state->linebuf[state->linelen - 1] == '\n')
786     {
787 	state->linebuf[state->linelen - 1] = NUL;
788 #ifdef USE_CRNL
789 	if (state->linelen > 1 && state->linebuf[state->linelen - 2] == '\r')
790 	    state->linebuf[state->linelen - 2] = NUL;
791 #endif
792     }
793 
794 #ifdef FEAT_MBYTE
795     remove_bom(state->linebuf);
796 #endif
797 
798     return QF_OK;
799 }
800 
801 typedef struct {
802     char_u	*namebuf;
803     char_u	*errmsg;
804     int		errmsglen;
805     long	lnum;
806     int		col;
807     char_u	use_viscol;
808     char_u	*pattern;
809     int		enr;
810     int		type;
811     int		valid;
812 } qffields_T;
813 
814 /*
815  * Parse a line and get the quickfix fields.
816  * Return the QF_ status.
817  */
818     static int
819 qf_parse_line(
820 	qf_info_T	*qi,
821 	char_u		*linebuf,
822 	int		linelen,
823 	efm_T		*fmt_first,
824 	qffields_T	*fields)
825 {
826     efm_T		*fmt_ptr;
827     char_u		*ptr;
828     int			len;
829     int			i;
830     int			idx = 0;
831     char_u		*tail = NULL;
832     regmatch_T		regmatch;
833 
834     /* Always ignore case when looking for a matching error. */
835     regmatch.rm_ic = TRUE;
836 
837     /* If there was no %> item start at the first pattern */
838     if (fmt_start == NULL)
839 	fmt_ptr = fmt_first;
840     else
841     {
842 	fmt_ptr = fmt_start;
843 	fmt_start = NULL;
844     }
845 
846     /*
847      * Try to match each part of 'errorformat' until we find a complete
848      * match or no match.
849      */
850     fields->valid = TRUE;
851 restofline:
852     for ( ; fmt_ptr != NULL; fmt_ptr = fmt_ptr->next)
853     {
854 	int r;
855 
856 	idx = fmt_ptr->prefix;
857 	if (qi->qf_multiscan && vim_strchr((char_u *)"OPQ", idx) == NULL)
858 	    continue;
859 	fields->namebuf[0] = NUL;
860 	fields->pattern[0] = NUL;
861 	if (!qi->qf_multiscan)
862 	    fields->errmsg[0] = NUL;
863 	fields->lnum = 0;
864 	fields->col = 0;
865 	fields->use_viscol = FALSE;
866 	fields->enr = -1;
867 	fields->type = 0;
868 	tail = NULL;
869 
870 	regmatch.regprog = fmt_ptr->prog;
871 	r = vim_regexec(&regmatch, linebuf, (colnr_T)0);
872 	fmt_ptr->prog = regmatch.regprog;
873 	if (r)
874 	{
875 	    if ((idx == 'C' || idx == 'Z') && !qi->qf_multiline)
876 		continue;
877 	    if (vim_strchr((char_u *)"EWI", idx) != NULL)
878 		fields->type = idx;
879 	    else
880 		fields->type = 0;
881 	    /*
882 	     * Extract error message data from matched line.
883 	     * We check for an actual submatch, because "\[" and "\]" in
884 	     * the 'errorformat' may cause the wrong submatch to be used.
885 	     */
886 	    if ((i = (int)fmt_ptr->addr[0]) > 0)		/* %f */
887 	    {
888 		int c;
889 
890 		if (regmatch.startp[i] == NULL || regmatch.endp[i] == NULL)
891 		    continue;
892 
893 		/* Expand ~/file and $HOME/file to full path. */
894 		c = *regmatch.endp[i];
895 		*regmatch.endp[i] = NUL;
896 		expand_env(regmatch.startp[i], fields->namebuf, CMDBUFFSIZE);
897 		*regmatch.endp[i] = c;
898 
899 		if (vim_strchr((char_u *)"OPQ", idx) != NULL
900 			&& mch_getperm(fields->namebuf) == -1)
901 		    continue;
902 	    }
903 	    if ((i = (int)fmt_ptr->addr[1]) > 0)		/* %n */
904 	    {
905 		if (regmatch.startp[i] == NULL)
906 		    continue;
907 		fields->enr = (int)atol((char *)regmatch.startp[i]);
908 	    }
909 	    if ((i = (int)fmt_ptr->addr[2]) > 0)		/* %l */
910 	    {
911 		if (regmatch.startp[i] == NULL)
912 		    continue;
913 		fields->lnum = atol((char *)regmatch.startp[i]);
914 	    }
915 	    if ((i = (int)fmt_ptr->addr[3]) > 0)		/* %c */
916 	    {
917 		if (regmatch.startp[i] == NULL)
918 		    continue;
919 		fields->col = (int)atol((char *)regmatch.startp[i]);
920 	    }
921 	    if ((i = (int)fmt_ptr->addr[4]) > 0)		/* %t */
922 	    {
923 		if (regmatch.startp[i] == NULL)
924 		    continue;
925 		fields->type = *regmatch.startp[i];
926 	    }
927 	    if (fmt_ptr->flags == '+' && !qi->qf_multiscan)	/* %+ */
928 	    {
929 		if (linelen >= fields->errmsglen)
930 		{
931 		    /* linelen + null terminator */
932 		    if ((fields->errmsg = vim_realloc(fields->errmsg,
933 				    linelen + 1)) == NULL)
934 			return QF_NOMEM;
935 		    fields->errmsglen = linelen + 1;
936 		}
937 		vim_strncpy(fields->errmsg, linebuf, linelen);
938 	    }
939 	    else if ((i = (int)fmt_ptr->addr[5]) > 0)	/* %m */
940 	    {
941 		if (regmatch.startp[i] == NULL || regmatch.endp[i] == NULL)
942 		    continue;
943 		len = (int)(regmatch.endp[i] - regmatch.startp[i]);
944 		if (len >= fields->errmsglen)
945 		{
946 		    /* len + null terminator */
947 		    if ((fields->errmsg = vim_realloc(fields->errmsg, len + 1))
948 			    == NULL)
949 			return QF_NOMEM;
950 		    fields->errmsglen = len + 1;
951 		}
952 		vim_strncpy(fields->errmsg, regmatch.startp[i], len);
953 	    }
954 	    if ((i = (int)fmt_ptr->addr[6]) > 0)		/* %r */
955 	    {
956 		if (regmatch.startp[i] == NULL)
957 		    continue;
958 		tail = regmatch.startp[i];
959 	    }
960 	    if ((i = (int)fmt_ptr->addr[7]) > 0)		/* %p */
961 	    {
962 		char_u	*match_ptr;
963 
964 		if (regmatch.startp[i] == NULL || regmatch.endp[i] == NULL)
965 		    continue;
966 		fields->col = 0;
967 		for (match_ptr = regmatch.startp[i];
968 			match_ptr != regmatch.endp[i]; ++match_ptr)
969 		{
970 		    ++fields->col;
971 		    if (*match_ptr == TAB)
972 		    {
973 			fields->col += 7;
974 			fields->col -= fields->col % 8;
975 		    }
976 		}
977 		++fields->col;
978 		fields->use_viscol = TRUE;
979 	    }
980 	    if ((i = (int)fmt_ptr->addr[8]) > 0)		/* %v */
981 	    {
982 		if (regmatch.startp[i] == NULL)
983 		    continue;
984 		fields->col = (int)atol((char *)regmatch.startp[i]);
985 		fields->use_viscol = TRUE;
986 	    }
987 	    if ((i = (int)fmt_ptr->addr[9]) > 0)		/* %s */
988 	    {
989 		if (regmatch.startp[i] == NULL || regmatch.endp[i] == NULL)
990 		    continue;
991 		len = (int)(regmatch.endp[i] - regmatch.startp[i]);
992 		if (len > CMDBUFFSIZE - 5)
993 		    len = CMDBUFFSIZE - 5;
994 		STRCPY(fields->pattern, "^\\V");
995 		STRNCAT(fields->pattern, regmatch.startp[i], len);
996 		fields->pattern[len + 3] = '\\';
997 		fields->pattern[len + 4] = '$';
998 		fields->pattern[len + 5] = NUL;
999 	    }
1000 	    break;
1001 	}
1002     }
1003     qi->qf_multiscan = FALSE;
1004 
1005     if (fmt_ptr == NULL || idx == 'D' || idx == 'X')
1006     {
1007 	if (fmt_ptr != NULL)
1008 	{
1009 	    if (idx == 'D')				/* enter directory */
1010 	    {
1011 		if (*fields->namebuf == NUL)
1012 		{
1013 		    EMSG(_("E379: Missing or empty directory name"));
1014 		    return QF_FAIL;
1015 		}
1016 		qi->qf_directory =
1017 		    qf_push_dir(fields->namebuf, &qi->qf_dir_stack, FALSE);
1018 		if (qi->qf_directory == NULL)
1019 		    return QF_FAIL;
1020 	    }
1021 	    else if (idx == 'X')			/* leave directory */
1022 		qi->qf_directory = qf_pop_dir(&qi->qf_dir_stack);
1023 	}
1024 	fields->namebuf[0] = NUL;	/* no match found, remove file name */
1025 	fields->lnum = 0;			/* don't jump to this line */
1026 	fields->valid = FALSE;
1027 	if (linelen >= fields->errmsglen)
1028 	{
1029 	    /* linelen + null terminator */
1030 	    if ((fields->errmsg = vim_realloc(fields->errmsg,
1031 			    linelen + 1)) == NULL)
1032 		return QF_NOMEM;
1033 	    fields->errmsglen = linelen + 1;
1034 	}
1035 	/* copy whole line to error message */
1036 	vim_strncpy(fields->errmsg, linebuf, linelen);
1037 	if (fmt_ptr == NULL)
1038 	    qi->qf_multiline = qi->qf_multiignore = FALSE;
1039     }
1040     else if (fmt_ptr != NULL)
1041     {
1042 	/* honor %> item */
1043 	if (fmt_ptr->conthere)
1044 	    fmt_start = fmt_ptr;
1045 
1046 	if (vim_strchr((char_u *)"AEWI", idx) != NULL)
1047 	{
1048 	    qi->qf_multiline = TRUE;	/* start of a multi-line message */
1049 	    qi->qf_multiignore = FALSE;	/* reset continuation */
1050 	}
1051 	else if (vim_strchr((char_u *)"CZ", idx) != NULL)
1052 	{				/* continuation of multi-line msg */
1053 	    if (!qi->qf_multiignore)
1054 	    {
1055 		qfline_T *qfprev = qi->qf_lists[qi->qf_curlist].qf_last;
1056 
1057 		if (qfprev == NULL)
1058 		    return QF_FAIL;
1059 		if (*fields->errmsg && !qi->qf_multiignore)
1060 		{
1061 		    len = (int)STRLEN(qfprev->qf_text);
1062 		    if ((ptr = alloc((unsigned)(len + STRLEN(fields->errmsg) + 2)))
1063 			    == NULL)
1064 			return QF_FAIL;
1065 		    STRCPY(ptr, qfprev->qf_text);
1066 		    vim_free(qfprev->qf_text);
1067 		    qfprev->qf_text = ptr;
1068 		    *(ptr += len) = '\n';
1069 		    STRCPY(++ptr, fields->errmsg);
1070 		}
1071 		if (qfprev->qf_nr == -1)
1072 		    qfprev->qf_nr = fields->enr;
1073 		if (vim_isprintc(fields->type) && !qfprev->qf_type)
1074 		    /* only printable chars allowed */
1075 		    qfprev->qf_type = fields->type;
1076 
1077 		if (!qfprev->qf_lnum)
1078 		    qfprev->qf_lnum = fields->lnum;
1079 		if (!qfprev->qf_col)
1080 		    qfprev->qf_col = fields->col;
1081 		qfprev->qf_viscol = fields->use_viscol;
1082 		if (!qfprev->qf_fnum)
1083 		    qfprev->qf_fnum = qf_get_fnum(qi, qi->qf_directory,
1084 			    *fields->namebuf || qi->qf_directory != NULL
1085 			    ? fields->namebuf
1086 			    : qi->qf_currfile != NULL && fields->valid
1087 			    ? qi->qf_currfile : 0);
1088 	    }
1089 	    if (idx == 'Z')
1090 		qi->qf_multiline = qi->qf_multiignore = FALSE;
1091 	    line_breakcheck();
1092 	    return QF_IGNORE_LINE;
1093 	}
1094 	else if (vim_strchr((char_u *)"OPQ", idx) != NULL)
1095 	{
1096 	    /* global file names */
1097 	    fields->valid = FALSE;
1098 	    if (*fields->namebuf == NUL || mch_getperm(fields->namebuf) >= 0)
1099 	    {
1100 		if (*fields->namebuf && idx == 'P')
1101 		    qi->qf_currfile =
1102 			qf_push_dir(fields->namebuf, &qi->qf_file_stack, TRUE);
1103 		else if (idx == 'Q')
1104 		    qi->qf_currfile = qf_pop_dir(&qi->qf_file_stack);
1105 		*fields->namebuf = NUL;
1106 		if (tail && *tail)
1107 		{
1108 		    STRMOVE(IObuff, skipwhite(tail));
1109 		    qi->qf_multiscan = TRUE;
1110 		    goto restofline;
1111 		}
1112 	    }
1113 	}
1114 	if (fmt_ptr->flags == '-')	/* generally exclude this line */
1115 	{
1116 	    if (qi->qf_multiline)
1117 		/* also exclude continuation lines */
1118 		qi->qf_multiignore = TRUE;
1119 	    return QF_IGNORE_LINE;
1120 	}
1121     }
1122 
1123     return QF_OK;
1124 }
1125 
1126 /*
1127  * Read the errorfile "efile" into memory, line by line, building the error
1128  * list.
1129  * Alternative: when "efile" is NULL read errors from buffer "buf".
1130  * Alternative: when "tv" is not NULL get errors from the string or list.
1131  * Always use 'errorformat' from "buf" if there is a local value.
1132  * Then "lnumfirst" and "lnumlast" specify the range of lines to use.
1133  * Set the title of the list to "qf_title".
1134  * Return -1 for error, number of errors for success.
1135  */
1136     static int
1137 qf_init_ext(
1138     qf_info_T	    *qi,
1139     char_u	    *efile,
1140     buf_T	    *buf,
1141     typval_T	    *tv,
1142     char_u	    *errorformat,
1143     int		    newlist,		/* TRUE: start a new error list */
1144     linenr_T	    lnumfirst,		/* first line number to use */
1145     linenr_T	    lnumlast,		/* last line number to use */
1146     char_u	    *qf_title,
1147     char_u	    *enc)
1148 {
1149     qfstate_T	    state;
1150     qffields_T	    fields;
1151 #ifdef FEAT_WINDOWS
1152     qfline_T	    *old_last = NULL;
1153     int		    adding = FALSE;
1154 #endif
1155     static efm_T    *fmt_first = NULL;
1156     char_u	    *efm;
1157     static char_u   *last_efm = NULL;
1158     int		    retval = -1;	/* default: return error flag */
1159     int		    status;
1160 
1161     /* Do not used the cached buffer, it may have been wiped out. */
1162     vim_free(qf_last_bufname);
1163     qf_last_bufname = NULL;
1164 
1165     vim_memset(&state, 0, sizeof(state));
1166     vim_memset(&fields, 0, sizeof(fields));
1167 #ifdef FEAT_MBYTE
1168     state.vc.vc_type = CONV_NONE;
1169     if (enc != NULL && *enc != NUL)
1170 	convert_setup(&state.vc, enc, p_enc);
1171 #endif
1172     fields.namebuf = alloc_id(CMDBUFFSIZE + 1, aid_qf_namebuf);
1173     fields.errmsglen = CMDBUFFSIZE + 1;
1174     fields.errmsg = alloc_id(fields.errmsglen, aid_qf_errmsg);
1175     fields.pattern = alloc_id(CMDBUFFSIZE + 1, aid_qf_pattern);
1176     if (fields.namebuf == NULL || fields.errmsg == NULL ||
1177 	    fields.pattern == NULL)
1178 	goto qf_init_end;
1179 
1180     if (efile != NULL && (state.fd = mch_fopen((char *)efile, "r")) == NULL)
1181     {
1182 	EMSG2(_(e_openerrf), efile);
1183 	goto qf_init_end;
1184     }
1185 
1186     if (newlist || qi->qf_curlist == qi->qf_listcount)
1187 	/* make place for a new list */
1188 	qf_new_list(qi, qf_title);
1189 #ifdef FEAT_WINDOWS
1190     else if (qi->qf_lists[qi->qf_curlist].qf_count > 0)
1191     {
1192 	/* Adding to existing list, use last entry. */
1193 	adding = TRUE;
1194 	old_last = qi->qf_lists[qi->qf_curlist].qf_last;
1195     }
1196 #endif
1197 
1198     /* Use the local value of 'errorformat' if it's set. */
1199     if (errorformat == p_efm && tv == NULL && *buf->b_p_efm != NUL)
1200 	efm = buf->b_p_efm;
1201     else
1202 	efm = errorformat;
1203 
1204     /*
1205      * If we are not adding or adding to another list: clear the state.
1206      */
1207     if (newlist || qi->qf_curlist != qi->qf_dir_curlist)
1208     {
1209 	qi->qf_dir_curlist = qi->qf_curlist;
1210 	qf_clean_dir_stack(&qi->qf_dir_stack);
1211 	qi->qf_directory = NULL;
1212 	qf_clean_dir_stack(&qi->qf_file_stack);
1213 	qi->qf_currfile = NULL;
1214 	qi->qf_multiline = FALSE;
1215 	qi->qf_multiignore = FALSE;
1216 	qi->qf_multiscan = FALSE;
1217     }
1218 
1219     /*
1220      * If the errorformat didn't change between calls, then reuse the
1221      * previously parsed values.
1222      */
1223     if (last_efm == NULL || (STRCMP(last_efm, efm) != 0))
1224     {
1225 	/* free the previously parsed data */
1226 	vim_free(last_efm);
1227 	last_efm = NULL;
1228 	free_efm_list(&fmt_first);
1229 
1230 	/* parse the current 'efm' */
1231 	fmt_first = parse_efm_option(efm);
1232 	if (fmt_first != NULL)
1233 	    last_efm = vim_strsave(efm);
1234     }
1235 
1236     if (fmt_first == NULL)	/* nothing found */
1237 	goto error2;
1238 
1239     /*
1240      * got_int is reset here, because it was probably set when killing the
1241      * ":make" command, but we still want to read the errorfile then.
1242      */
1243     got_int = FALSE;
1244 
1245     if (tv != NULL)
1246     {
1247 	if (tv->v_type == VAR_STRING)
1248 	    state.p_str = tv->vval.v_string;
1249 	else if (tv->v_type == VAR_LIST)
1250 	    state.p_li = tv->vval.v_list->lv_first;
1251 	state.tv = tv;
1252     }
1253     state.buf = buf;
1254     state.buflnum = lnumfirst;
1255     state.lnumlast = lnumlast;
1256 
1257     /*
1258      * Read the lines in the error file one by one.
1259      * Try to recognize one of the error formats in each line.
1260      */
1261     while (!got_int)
1262     {
1263 	/* Get the next line from a file/buffer/list/string */
1264 	status = qf_get_nextline(&state);
1265 	if (status == QF_NOMEM)		/* memory alloc failure */
1266 	    goto qf_init_end;
1267 	if (status == QF_END_OF_INPUT)	/* end of input */
1268 	    break;
1269 
1270 	status = qf_parse_line(qi, state.linebuf, state.linelen, fmt_first,
1271 								      &fields);
1272 	if (status == QF_FAIL)
1273 	    goto error2;
1274 	if (status == QF_NOMEM)
1275 	    goto qf_init_end;
1276 	if (status == QF_IGNORE_LINE)
1277 	    continue;
1278 
1279 	if (qf_add_entry(qi,
1280 			qi->qf_curlist,
1281 			qi->qf_directory,
1282 			(*fields.namebuf || qi->qf_directory != NULL)
1283 			    ? fields.namebuf
1284 			    : ((qi->qf_currfile != NULL && fields.valid)
1285 				? qi->qf_currfile : (char_u *)NULL),
1286 			0,
1287 			fields.errmsg,
1288 			fields.lnum,
1289 			fields.col,
1290 			fields.use_viscol,
1291 			fields.pattern,
1292 			fields.enr,
1293 			fields.type,
1294 			fields.valid) == FAIL)
1295 	    goto error2;
1296 	line_breakcheck();
1297     }
1298     if (state.fd == NULL || !ferror(state.fd))
1299     {
1300 	if (qi->qf_lists[qi->qf_curlist].qf_index == 0)
1301 	{
1302 	    /* no valid entry found */
1303 	    qi->qf_lists[qi->qf_curlist].qf_ptr =
1304 		qi->qf_lists[qi->qf_curlist].qf_start;
1305 	    qi->qf_lists[qi->qf_curlist].qf_index = 1;
1306 	    qi->qf_lists[qi->qf_curlist].qf_nonevalid = TRUE;
1307 	}
1308 	else
1309 	{
1310 	    qi->qf_lists[qi->qf_curlist].qf_nonevalid = FALSE;
1311 	    if (qi->qf_lists[qi->qf_curlist].qf_ptr == NULL)
1312 		qi->qf_lists[qi->qf_curlist].qf_ptr =
1313 		    qi->qf_lists[qi->qf_curlist].qf_start;
1314 	}
1315 	/* return number of matches */
1316 	retval = qi->qf_lists[qi->qf_curlist].qf_count;
1317 	goto qf_init_end;
1318     }
1319     EMSG(_(e_readerrf));
1320 error2:
1321     if (!adding)
1322     {
1323 	qf_free(qi, qi->qf_curlist);
1324 	qi->qf_listcount--;
1325 	if (qi->qf_curlist > 0)
1326 	    --qi->qf_curlist;
1327     }
1328 qf_init_end:
1329     if (state.fd != NULL)
1330 	fclose(state.fd);
1331     vim_free(fields.namebuf);
1332     vim_free(fields.errmsg);
1333     vim_free(fields.pattern);
1334     vim_free(state.growbuf);
1335 
1336 #ifdef FEAT_WINDOWS
1337     qf_update_buffer(qi, old_last);
1338 #endif
1339 #ifdef FEAT_MBYTE
1340     if (state.vc.vc_type != CONV_NONE)
1341 	convert_setup(&state.vc, NULL, NULL);
1342 #endif
1343 
1344     return retval;
1345 }
1346 
1347     static void
1348 qf_store_title(qf_info_T *qi, int qf_idx, char_u *title)
1349 {
1350     if (title != NULL)
1351     {
1352 	char_u *p = alloc((int)STRLEN(title) + 2);
1353 
1354 	qi->qf_lists[qf_idx].qf_title = p;
1355 	if (p != NULL)
1356 	    sprintf((char *)p, ":%s", (char *)title);
1357     }
1358 }
1359 
1360 /*
1361  * Prepare for adding a new quickfix list.
1362  */
1363     static void
1364 qf_new_list(qf_info_T *qi, char_u *qf_title)
1365 {
1366     int		i;
1367 
1368     /*
1369      * If the current entry is not the last entry, delete entries beyond
1370      * the current entry.  This makes it possible to browse in a tree-like
1371      * way with ":grep'.
1372      */
1373     while (qi->qf_listcount > qi->qf_curlist + 1)
1374 	qf_free(qi, --qi->qf_listcount);
1375 
1376     /*
1377      * When the stack is full, remove to oldest entry
1378      * Otherwise, add a new entry.
1379      */
1380     if (qi->qf_listcount == LISTCOUNT)
1381     {
1382 	qf_free(qi, 0);
1383 	for (i = 1; i < LISTCOUNT; ++i)
1384 	    qi->qf_lists[i - 1] = qi->qf_lists[i];
1385 	qi->qf_curlist = LISTCOUNT - 1;
1386     }
1387     else
1388 	qi->qf_curlist = qi->qf_listcount++;
1389     vim_memset(&qi->qf_lists[qi->qf_curlist], 0, (size_t)(sizeof(qf_list_T)));
1390     qf_store_title(qi, qi->qf_curlist, qf_title);
1391 }
1392 
1393 /*
1394  * Free a location list
1395  */
1396     static void
1397 ll_free_all(qf_info_T **pqi)
1398 {
1399     int		i;
1400     qf_info_T	*qi;
1401 
1402     qi = *pqi;
1403     if (qi == NULL)
1404 	return;
1405     *pqi = NULL;	/* Remove reference to this list */
1406 
1407     qi->qf_refcount--;
1408     if (qi->qf_refcount < 1)
1409     {
1410 	/* No references to this location list */
1411 	for (i = 0; i < qi->qf_listcount; ++i)
1412 	    qf_free(qi, i);
1413 	vim_free(qi);
1414     }
1415 }
1416 
1417     void
1418 qf_free_all(win_T *wp)
1419 {
1420     int		i;
1421     qf_info_T	*qi = &ql_info;
1422 
1423     if (wp != NULL)
1424     {
1425 	/* location list */
1426 	ll_free_all(&wp->w_llist);
1427 	ll_free_all(&wp->w_llist_ref);
1428     }
1429     else
1430 	/* quickfix list */
1431 	for (i = 0; i < qi->qf_listcount; ++i)
1432 	    qf_free(qi, i);
1433 }
1434 
1435 /*
1436  * Add an entry to the end of the list of errors.
1437  * Returns OK or FAIL.
1438  */
1439     static int
1440 qf_add_entry(
1441     qf_info_T	*qi,		/* quickfix list */
1442     int		qf_idx,		/* list index */
1443     char_u	*dir,		/* optional directory name */
1444     char_u	*fname,		/* file name or NULL */
1445     int		bufnum,		/* buffer number or zero */
1446     char_u	*mesg,		/* message */
1447     long	lnum,		/* line number */
1448     int		col,		/* column */
1449     int		vis_col,	/* using visual column */
1450     char_u	*pattern,	/* search pattern */
1451     int		nr,		/* error number */
1452     int		type,		/* type character */
1453     int		valid)		/* valid entry */
1454 {
1455     qfline_T	*qfp;
1456     qfline_T	**lastp;	/* pointer to qf_last or NULL */
1457 
1458     if ((qfp = (qfline_T *)alloc((unsigned)sizeof(qfline_T))) == NULL)
1459 	return FAIL;
1460     if (bufnum != 0)
1461     {
1462 	buf_T *buf = buflist_findnr(bufnum);
1463 
1464 	qfp->qf_fnum = bufnum;
1465 	if (buf != NULL)
1466 	    buf->b_has_qf_entry |=
1467 		(qi == &ql_info) ? BUF_HAS_QF_ENTRY : BUF_HAS_LL_ENTRY;
1468     }
1469     else
1470 	qfp->qf_fnum = qf_get_fnum(qi, dir, fname);
1471     if ((qfp->qf_text = vim_strsave(mesg)) == NULL)
1472     {
1473 	vim_free(qfp);
1474 	return FAIL;
1475     }
1476     qfp->qf_lnum = lnum;
1477     qfp->qf_col = col;
1478     qfp->qf_viscol = vis_col;
1479     if (pattern == NULL || *pattern == NUL)
1480 	qfp->qf_pattern = NULL;
1481     else if ((qfp->qf_pattern = vim_strsave(pattern)) == NULL)
1482     {
1483 	vim_free(qfp->qf_text);
1484 	vim_free(qfp);
1485 	return FAIL;
1486     }
1487     qfp->qf_nr = nr;
1488     if (type != 1 && !vim_isprintc(type)) /* only printable chars allowed */
1489 	type = 0;
1490     qfp->qf_type = type;
1491     qfp->qf_valid = valid;
1492 
1493     lastp = &qi->qf_lists[qf_idx].qf_last;
1494     if (qi->qf_lists[qf_idx].qf_count == 0)
1495 				/* first element in the list */
1496     {
1497 	qi->qf_lists[qf_idx].qf_start = qfp;
1498 	qi->qf_lists[qf_idx].qf_ptr = qfp;
1499 	qi->qf_lists[qf_idx].qf_index = 0;
1500 	qfp->qf_prev = NULL;
1501     }
1502     else
1503     {
1504 	qfp->qf_prev = *lastp;
1505 	(*lastp)->qf_next = qfp;
1506     }
1507     qfp->qf_next = NULL;
1508     qfp->qf_cleared = FALSE;
1509     *lastp = qfp;
1510     ++qi->qf_lists[qf_idx].qf_count;
1511     if (qi->qf_lists[qf_idx].qf_index == 0 && qfp->qf_valid)
1512 				/* first valid entry */
1513     {
1514 	qi->qf_lists[qf_idx].qf_index =
1515 	    qi->qf_lists[qf_idx].qf_count;
1516 	qi->qf_lists[qf_idx].qf_ptr = qfp;
1517     }
1518 
1519     return OK;
1520 }
1521 
1522 /*
1523  * Allocate a new location list
1524  */
1525     static qf_info_T *
1526 ll_new_list(void)
1527 {
1528     qf_info_T *qi;
1529 
1530     qi = (qf_info_T *)alloc((unsigned)sizeof(qf_info_T));
1531     if (qi != NULL)
1532     {
1533 	vim_memset(qi, 0, (size_t)(sizeof(qf_info_T)));
1534 	qi->qf_refcount++;
1535     }
1536 
1537     return qi;
1538 }
1539 
1540 /*
1541  * Return the location list for window 'wp'.
1542  * If not present, allocate a location list
1543  */
1544     static qf_info_T *
1545 ll_get_or_alloc_list(win_T *wp)
1546 {
1547     if (IS_LL_WINDOW(wp))
1548 	/* For a location list window, use the referenced location list */
1549 	return wp->w_llist_ref;
1550 
1551     /*
1552      * For a non-location list window, w_llist_ref should not point to a
1553      * location list.
1554      */
1555     ll_free_all(&wp->w_llist_ref);
1556 
1557     if (wp->w_llist == NULL)
1558 	wp->w_llist = ll_new_list();	    /* new location list */
1559     return wp->w_llist;
1560 }
1561 
1562 /*
1563  * Copy the location list from window "from" to window "to".
1564  */
1565     void
1566 copy_loclist(win_T *from, win_T *to)
1567 {
1568     qf_info_T	*qi;
1569     int		idx;
1570     int		i;
1571 
1572     /*
1573      * When copying from a location list window, copy the referenced
1574      * location list. For other windows, copy the location list for
1575      * that window.
1576      */
1577     if (IS_LL_WINDOW(from))
1578 	qi = from->w_llist_ref;
1579     else
1580 	qi = from->w_llist;
1581 
1582     if (qi == NULL)		    /* no location list to copy */
1583 	return;
1584 
1585     /* allocate a new location list */
1586     if ((to->w_llist = ll_new_list()) == NULL)
1587 	return;
1588 
1589     to->w_llist->qf_listcount = qi->qf_listcount;
1590 
1591     /* Copy the location lists one at a time */
1592     for (idx = 0; idx < qi->qf_listcount; idx++)
1593     {
1594 	qf_list_T   *from_qfl;
1595 	qf_list_T   *to_qfl;
1596 
1597 	to->w_llist->qf_curlist = idx;
1598 
1599 	from_qfl = &qi->qf_lists[idx];
1600 	to_qfl = &to->w_llist->qf_lists[idx];
1601 
1602 	/* Some of the fields are populated by qf_add_entry() */
1603 	to_qfl->qf_nonevalid = from_qfl->qf_nonevalid;
1604 	to_qfl->qf_count = 0;
1605 	to_qfl->qf_index = 0;
1606 	to_qfl->qf_start = NULL;
1607 	to_qfl->qf_last = NULL;
1608 	to_qfl->qf_ptr = NULL;
1609 	if (from_qfl->qf_title != NULL)
1610 	    to_qfl->qf_title = vim_strsave(from_qfl->qf_title);
1611 	else
1612 	    to_qfl->qf_title = NULL;
1613 	if (from_qfl->qf_ctx != NULL)
1614 	{
1615 	    to_qfl->qf_ctx = alloc_tv();
1616 	    if (to_qfl->qf_ctx != NULL)
1617 		copy_tv(from_qfl->qf_ctx, to_qfl->qf_ctx);
1618 	}
1619 	else
1620 	    to_qfl->qf_ctx = NULL;
1621 
1622 	if (from_qfl->qf_count)
1623 	{
1624 	    qfline_T    *from_qfp;
1625 	    qfline_T    *prevp;
1626 
1627 	    /* copy all the location entries in this list */
1628 	    for (i = 0, from_qfp = from_qfl->qf_start;
1629 		    i < from_qfl->qf_count && from_qfp != NULL;
1630 		    ++i, from_qfp = from_qfp->qf_next)
1631 	    {
1632 		if (qf_add_entry(to->w_llist,
1633 				 to->w_llist->qf_curlist,
1634 				 NULL,
1635 				 NULL,
1636 				 0,
1637 				 from_qfp->qf_text,
1638 				 from_qfp->qf_lnum,
1639 				 from_qfp->qf_col,
1640 				 from_qfp->qf_viscol,
1641 				 from_qfp->qf_pattern,
1642 				 from_qfp->qf_nr,
1643 				 0,
1644 				 from_qfp->qf_valid) == FAIL)
1645 		{
1646 		    qf_free_all(to);
1647 		    return;
1648 		}
1649 		/*
1650 		 * qf_add_entry() will not set the qf_num field, as the
1651 		 * directory and file names are not supplied. So the qf_fnum
1652 		 * field is copied here.
1653 		 */
1654 		prevp = to->w_llist->qf_lists[to->w_llist->qf_curlist].qf_last;
1655 		prevp->qf_fnum = from_qfp->qf_fnum; /* file number */
1656 		prevp->qf_type = from_qfp->qf_type; /* error type */
1657 		if (from_qfl->qf_ptr == from_qfp)
1658 		    to_qfl->qf_ptr = prevp;	    /* current location */
1659 	    }
1660 	}
1661 
1662 	to_qfl->qf_index = from_qfl->qf_index;	/* current index in the list */
1663 
1664 	/* When no valid entries are present in the list, qf_ptr points to
1665 	 * the first item in the list */
1666 	if (to_qfl->qf_nonevalid)
1667 	{
1668 	    to_qfl->qf_ptr = to_qfl->qf_start;
1669 	    to_qfl->qf_index = 1;
1670 	}
1671     }
1672 
1673     to->w_llist->qf_curlist = qi->qf_curlist;	/* current list */
1674 }
1675 
1676 /*
1677  * Get buffer number for file "directory/fname".
1678  * Also sets the b_has_qf_entry flag.
1679  */
1680     static int
1681 qf_get_fnum(qf_info_T *qi, char_u *directory, char_u *fname)
1682 {
1683     char_u	*ptr = NULL;
1684     buf_T	*buf;
1685     char_u	*bufname;
1686 
1687     if (fname == NULL || *fname == NUL)		/* no file name */
1688 	return 0;
1689 
1690 #ifdef VMS
1691     vms_remove_version(fname);
1692 #endif
1693 #ifdef BACKSLASH_IN_FILENAME
1694     if (directory != NULL)
1695 	slash_adjust(directory);
1696     slash_adjust(fname);
1697 #endif
1698     if (directory != NULL && !vim_isAbsName(fname)
1699 	    && (ptr = concat_fnames(directory, fname, TRUE)) != NULL)
1700     {
1701 	/*
1702 	 * Here we check if the file really exists.
1703 	 * This should normally be true, but if make works without
1704 	 * "leaving directory"-messages we might have missed a
1705 	 * directory change.
1706 	 */
1707 	if (mch_getperm(ptr) < 0)
1708 	{
1709 	    vim_free(ptr);
1710 	    directory = qf_guess_filepath(qi, fname);
1711 	    if (directory)
1712 		ptr = concat_fnames(directory, fname, TRUE);
1713 	    else
1714 		ptr = vim_strsave(fname);
1715 	}
1716 	/* Use concatenated directory name and file name */
1717 	bufname = ptr;
1718     }
1719     else
1720 	bufname = fname;
1721 
1722     if (qf_last_bufname != NULL && STRCMP(bufname, qf_last_bufname) == 0
1723 	    && bufref_valid(&qf_last_bufref))
1724     {
1725 	buf = qf_last_bufref.br_buf;
1726 	vim_free(ptr);
1727     }
1728     else
1729     {
1730 	vim_free(qf_last_bufname);
1731 	buf = buflist_new(bufname, NULL, (linenr_T)0, BLN_NOOPT);
1732 	if (bufname == ptr)
1733 	    qf_last_bufname = bufname;
1734 	else
1735 	    qf_last_bufname = vim_strsave(bufname);
1736 	set_bufref(&qf_last_bufref, buf);
1737     }
1738     if (buf == NULL)
1739 	return 0;
1740 
1741     buf->b_has_qf_entry =
1742 			(qi == &ql_info) ? BUF_HAS_QF_ENTRY : BUF_HAS_LL_ENTRY;
1743     return buf->b_fnum;
1744 }
1745 
1746 /*
1747  * Push dirbuf onto the directory stack and return pointer to actual dir or
1748  * NULL on error.
1749  */
1750     static char_u *
1751 qf_push_dir(char_u *dirbuf, struct dir_stack_T **stackptr, int is_file_stack)
1752 {
1753     struct dir_stack_T  *ds_new;
1754     struct dir_stack_T  *ds_ptr;
1755 
1756     /* allocate new stack element and hook it in */
1757     ds_new = (struct dir_stack_T *)alloc((unsigned)sizeof(struct dir_stack_T));
1758     if (ds_new == NULL)
1759 	return NULL;
1760 
1761     ds_new->next = *stackptr;
1762     *stackptr = ds_new;
1763 
1764     /* store directory on the stack */
1765     if (vim_isAbsName(dirbuf)
1766 	    || (*stackptr)->next == NULL
1767 	    || (*stackptr && is_file_stack))
1768 	(*stackptr)->dirname = vim_strsave(dirbuf);
1769     else
1770     {
1771 	/* Okay we don't have an absolute path.
1772 	 * dirbuf must be a subdir of one of the directories on the stack.
1773 	 * Let's search...
1774 	 */
1775 	ds_new = (*stackptr)->next;
1776 	(*stackptr)->dirname = NULL;
1777 	while (ds_new)
1778 	{
1779 	    vim_free((*stackptr)->dirname);
1780 	    (*stackptr)->dirname = concat_fnames(ds_new->dirname, dirbuf,
1781 		    TRUE);
1782 	    if (mch_isdir((*stackptr)->dirname) == TRUE)
1783 		break;
1784 
1785 	    ds_new = ds_new->next;
1786 	}
1787 
1788 	/* clean up all dirs we already left */
1789 	while ((*stackptr)->next != ds_new)
1790 	{
1791 	    ds_ptr = (*stackptr)->next;
1792 	    (*stackptr)->next = (*stackptr)->next->next;
1793 	    vim_free(ds_ptr->dirname);
1794 	    vim_free(ds_ptr);
1795 	}
1796 
1797 	/* Nothing found -> it must be on top level */
1798 	if (ds_new == NULL)
1799 	{
1800 	    vim_free((*stackptr)->dirname);
1801 	    (*stackptr)->dirname = vim_strsave(dirbuf);
1802 	}
1803     }
1804 
1805     if ((*stackptr)->dirname != NULL)
1806 	return (*stackptr)->dirname;
1807     else
1808     {
1809 	ds_ptr = *stackptr;
1810 	*stackptr = (*stackptr)->next;
1811 	vim_free(ds_ptr);
1812 	return NULL;
1813     }
1814 }
1815 
1816 
1817 /*
1818  * pop dirbuf from the directory stack and return previous directory or NULL if
1819  * stack is empty
1820  */
1821     static char_u *
1822 qf_pop_dir(struct dir_stack_T **stackptr)
1823 {
1824     struct dir_stack_T  *ds_ptr;
1825 
1826     /* TODO: Should we check if dirbuf is the directory on top of the stack?
1827      * What to do if it isn't? */
1828 
1829     /* pop top element and free it */
1830     if (*stackptr != NULL)
1831     {
1832 	ds_ptr = *stackptr;
1833 	*stackptr = (*stackptr)->next;
1834 	vim_free(ds_ptr->dirname);
1835 	vim_free(ds_ptr);
1836     }
1837 
1838     /* return NEW top element as current dir or NULL if stack is empty*/
1839     return *stackptr ? (*stackptr)->dirname : NULL;
1840 }
1841 
1842 /*
1843  * clean up directory stack
1844  */
1845     static void
1846 qf_clean_dir_stack(struct dir_stack_T **stackptr)
1847 {
1848     struct dir_stack_T  *ds_ptr;
1849 
1850     while ((ds_ptr = *stackptr) != NULL)
1851     {
1852 	*stackptr = (*stackptr)->next;
1853 	vim_free(ds_ptr->dirname);
1854 	vim_free(ds_ptr);
1855     }
1856 }
1857 
1858 /*
1859  * Check in which directory of the directory stack the given file can be
1860  * found.
1861  * Returns a pointer to the directory name or NULL if not found.
1862  * Cleans up intermediate directory entries.
1863  *
1864  * TODO: How to solve the following problem?
1865  * If we have the this directory tree:
1866  *     ./
1867  *     ./aa
1868  *     ./aa/bb
1869  *     ./bb
1870  *     ./bb/x.c
1871  * and make says:
1872  *     making all in aa
1873  *     making all in bb
1874  *     x.c:9: Error
1875  * Then qf_push_dir thinks we are in ./aa/bb, but we are in ./bb.
1876  * qf_guess_filepath will return NULL.
1877  */
1878     static char_u *
1879 qf_guess_filepath(qf_info_T *qi, char_u *filename)
1880 {
1881     struct dir_stack_T     *ds_ptr;
1882     struct dir_stack_T     *ds_tmp;
1883     char_u		   *fullname;
1884 
1885     /* no dirs on the stack - there's nothing we can do */
1886     if (qi->qf_dir_stack == NULL)
1887 	return NULL;
1888 
1889     ds_ptr = qi->qf_dir_stack->next;
1890     fullname = NULL;
1891     while (ds_ptr)
1892     {
1893 	vim_free(fullname);
1894 	fullname = concat_fnames(ds_ptr->dirname, filename, TRUE);
1895 
1896 	/* If concat_fnames failed, just go on. The worst thing that can happen
1897 	 * is that we delete the entire stack.
1898 	 */
1899 	if ((fullname != NULL) && (mch_getperm(fullname) >= 0))
1900 	    break;
1901 
1902 	ds_ptr = ds_ptr->next;
1903     }
1904 
1905     vim_free(fullname);
1906 
1907     /* clean up all dirs we already left */
1908     while (qi->qf_dir_stack->next != ds_ptr)
1909     {
1910 	ds_tmp = qi->qf_dir_stack->next;
1911 	qi->qf_dir_stack->next = qi->qf_dir_stack->next->next;
1912 	vim_free(ds_tmp->dirname);
1913 	vim_free(ds_tmp);
1914     }
1915 
1916     return ds_ptr==NULL? NULL: ds_ptr->dirname;
1917 }
1918 
1919 /*
1920  * When loading a file from the quickfix, the auto commands may modify it.
1921  * This may invalidate the current quickfix entry.  This function checks
1922  * whether a entry is still present in the quickfix.
1923  * Similar to location list.
1924  */
1925     static int
1926 is_qf_entry_present(qf_info_T *qi, qfline_T *qf_ptr)
1927 {
1928     qf_list_T	*qfl;
1929     qfline_T	*qfp;
1930     int		i;
1931 
1932     qfl = &qi->qf_lists[qi->qf_curlist];
1933 
1934     /* Search for the entry in the current list */
1935     for (i = 0, qfp = qfl->qf_start; i < qfl->qf_count;
1936 	    ++i, qfp = qfp->qf_next)
1937 	if (qfp == NULL || qfp == qf_ptr)
1938 	    break;
1939 
1940     if (i == qfl->qf_count) /* Entry is not found */
1941 	return FALSE;
1942 
1943     return TRUE;
1944 }
1945 
1946 /*
1947  * jump to a quickfix line
1948  * if dir == FORWARD go "errornr" valid entries forward
1949  * if dir == BACKWARD go "errornr" valid entries backward
1950  * if dir == FORWARD_FILE go "errornr" valid entries files backward
1951  * if dir == BACKWARD_FILE go "errornr" valid entries files backward
1952  * else if "errornr" is zero, redisplay the same line
1953  * else go to entry "errornr"
1954  */
1955     void
1956 qf_jump(
1957     qf_info_T	*qi,
1958     int		dir,
1959     int		errornr,
1960     int		forceit)
1961 {
1962     qf_info_T		*ll_ref;
1963     qfline_T		*qf_ptr;
1964     qfline_T		*old_qf_ptr;
1965     int			qf_index;
1966     int			old_qf_fnum;
1967     int			old_qf_index;
1968     int			prev_index;
1969     static char_u	*e_no_more_items = (char_u *)N_("E553: No more items");
1970     char_u		*err = e_no_more_items;
1971     linenr_T		i;
1972     buf_T		*old_curbuf;
1973     linenr_T		old_lnum;
1974     colnr_T		screen_col;
1975     colnr_T		char_col;
1976     char_u		*line;
1977 #ifdef FEAT_WINDOWS
1978     char_u		*old_swb = p_swb;
1979     unsigned		old_swb_flags = swb_flags;
1980     int			opened_window = FALSE;
1981     win_T		*win;
1982     win_T		*altwin;
1983     int			flags;
1984 #endif
1985     win_T		*oldwin = curwin;
1986     int			print_message = TRUE;
1987     int			len;
1988 #ifdef FEAT_FOLDING
1989     int			old_KeyTyped = KeyTyped; /* getting file may reset it */
1990 #endif
1991     int			ok = OK;
1992     int			usable_win;
1993 
1994     if (qi == NULL)
1995 	qi = &ql_info;
1996 
1997     if (qi->qf_curlist >= qi->qf_listcount
1998 	|| qi->qf_lists[qi->qf_curlist].qf_count == 0)
1999     {
2000 	EMSG(_(e_quickfix));
2001 	return;
2002     }
2003 
2004     qf_ptr = qi->qf_lists[qi->qf_curlist].qf_ptr;
2005     old_qf_ptr = qf_ptr;
2006     qf_index = qi->qf_lists[qi->qf_curlist].qf_index;
2007     old_qf_index = qf_index;
2008     if (dir == FORWARD || dir == FORWARD_FILE)	    /* next valid entry */
2009     {
2010 	while (errornr--)
2011 	{
2012 	    old_qf_ptr = qf_ptr;
2013 	    prev_index = qf_index;
2014 	    old_qf_fnum = qf_ptr->qf_fnum;
2015 	    do
2016 	    {
2017 		if (qf_index == qi->qf_lists[qi->qf_curlist].qf_count
2018 						   || qf_ptr->qf_next == NULL)
2019 		{
2020 		    qf_ptr = old_qf_ptr;
2021 		    qf_index = prev_index;
2022 		    if (err != NULL)
2023 		    {
2024 			EMSG(_(err));
2025 			goto theend;
2026 		    }
2027 		    errornr = 0;
2028 		    break;
2029 		}
2030 		++qf_index;
2031 		qf_ptr = qf_ptr->qf_next;
2032 	    } while ((!qi->qf_lists[qi->qf_curlist].qf_nonevalid
2033 		      && !qf_ptr->qf_valid)
2034 		  || (dir == FORWARD_FILE && qf_ptr->qf_fnum == old_qf_fnum));
2035 	    err = NULL;
2036 	}
2037     }
2038     else if (dir == BACKWARD || dir == BACKWARD_FILE)  /* prev. valid entry */
2039     {
2040 	while (errornr--)
2041 	{
2042 	    old_qf_ptr = qf_ptr;
2043 	    prev_index = qf_index;
2044 	    old_qf_fnum = qf_ptr->qf_fnum;
2045 	    do
2046 	    {
2047 		if (qf_index == 1 || qf_ptr->qf_prev == NULL)
2048 		{
2049 		    qf_ptr = old_qf_ptr;
2050 		    qf_index = prev_index;
2051 		    if (err != NULL)
2052 		    {
2053 			EMSG(_(err));
2054 			goto theend;
2055 		    }
2056 		    errornr = 0;
2057 		    break;
2058 		}
2059 		--qf_index;
2060 		qf_ptr = qf_ptr->qf_prev;
2061 	    } while ((!qi->qf_lists[qi->qf_curlist].qf_nonevalid
2062 		      && !qf_ptr->qf_valid)
2063 		  || (dir == BACKWARD_FILE && qf_ptr->qf_fnum == old_qf_fnum));
2064 	    err = NULL;
2065 	}
2066     }
2067     else if (errornr != 0)	/* go to specified number */
2068     {
2069 	while (errornr < qf_index && qf_index > 1 && qf_ptr->qf_prev != NULL)
2070 	{
2071 	    --qf_index;
2072 	    qf_ptr = qf_ptr->qf_prev;
2073 	}
2074 	while (errornr > qf_index && qf_index <
2075 				    qi->qf_lists[qi->qf_curlist].qf_count
2076 						   && qf_ptr->qf_next != NULL)
2077 	{
2078 	    ++qf_index;
2079 	    qf_ptr = qf_ptr->qf_next;
2080 	}
2081     }
2082 
2083 #ifdef FEAT_WINDOWS
2084     qi->qf_lists[qi->qf_curlist].qf_index = qf_index;
2085     if (qf_win_pos_update(qi, old_qf_index))
2086 	/* No need to print the error message if it's visible in the error
2087 	 * window */
2088 	print_message = FALSE;
2089 
2090     /*
2091      * For ":helpgrep" find a help window or open one.
2092      */
2093     if (qf_ptr->qf_type == 1 && (!curwin->w_buffer->b_help || cmdmod.tab != 0))
2094     {
2095 	win_T	*wp;
2096 
2097 	if (cmdmod.tab != 0)
2098 	    wp = NULL;
2099 	else
2100 	    FOR_ALL_WINDOWS(wp)
2101 		if (wp->w_buffer != NULL && wp->w_buffer->b_help)
2102 		    break;
2103 	if (wp != NULL && wp->w_buffer->b_nwindows > 0)
2104 	    win_enter(wp, TRUE);
2105 	else
2106 	{
2107 	    /*
2108 	     * Split off help window; put it at far top if no position
2109 	     * specified, the current window is vertically split and narrow.
2110 	     */
2111 	    flags = WSP_HELP;
2112 	    if (cmdmod.split == 0 && curwin->w_width != Columns
2113 						      && curwin->w_width < 80)
2114 		flags |= WSP_TOP;
2115 	    if (qi != &ql_info)
2116 		flags |= WSP_NEWLOC;  /* don't copy the location list */
2117 
2118 	    if (win_split(0, flags) == FAIL)
2119 		goto theend;
2120 	    opened_window = TRUE;	/* close it when fail */
2121 
2122 	    if (curwin->w_height < p_hh)
2123 		win_setheight((int)p_hh);
2124 
2125 	    if (qi != &ql_info)	    /* not a quickfix list */
2126 	    {
2127 		/* The new window should use the supplied location list */
2128 		curwin->w_llist = qi;
2129 		qi->qf_refcount++;
2130 	    }
2131 	}
2132 
2133 	if (!p_im)
2134 	    restart_edit = 0;	    /* don't want insert mode in help file */
2135     }
2136 
2137     /*
2138      * If currently in the quickfix window, find another window to show the
2139      * file in.
2140      */
2141     if (bt_quickfix(curbuf) && !opened_window)
2142     {
2143 	win_T *usable_win_ptr = NULL;
2144 
2145 	/*
2146 	 * If there is no file specified, we don't know where to go.
2147 	 * But do advance, otherwise ":cn" gets stuck.
2148 	 */
2149 	if (qf_ptr->qf_fnum == 0)
2150 	    goto theend;
2151 
2152 	usable_win = 0;
2153 
2154 	ll_ref = curwin->w_llist_ref;
2155 	if (ll_ref != NULL)
2156 	{
2157 	    /* Find a window using the same location list that is not a
2158 	     * quickfix window. */
2159 	    FOR_ALL_WINDOWS(usable_win_ptr)
2160 		if (usable_win_ptr->w_llist == ll_ref
2161 			&& usable_win_ptr->w_buffer->b_p_bt[0] != 'q')
2162 		{
2163 		    usable_win = 1;
2164 		    break;
2165 		}
2166 	}
2167 
2168 	if (!usable_win)
2169 	{
2170 	    /* Locate a window showing a normal buffer */
2171 	    FOR_ALL_WINDOWS(win)
2172 		if (win->w_buffer->b_p_bt[0] == NUL)
2173 		{
2174 		    usable_win = 1;
2175 		    break;
2176 		}
2177 	}
2178 
2179 	/*
2180 	 * If no usable window is found and 'switchbuf' contains "usetab"
2181 	 * then search in other tabs.
2182 	 */
2183 	if (!usable_win && (swb_flags & SWB_USETAB))
2184 	{
2185 	    tabpage_T	*tp;
2186 	    win_T	*wp;
2187 
2188 	    FOR_ALL_TAB_WINDOWS(tp, wp)
2189 	    {
2190 		if (wp->w_buffer->b_fnum == qf_ptr->qf_fnum)
2191 		{
2192 		    goto_tabpage_win(tp, wp);
2193 		    usable_win = 1;
2194 		    goto win_found;
2195 		}
2196 	    }
2197 	}
2198 win_found:
2199 
2200 	/*
2201 	 * If there is only one window and it is the quickfix window, create a
2202 	 * new one above the quickfix window.
2203 	 */
2204 	if ((ONE_WINDOW && bt_quickfix(curbuf)) || !usable_win)
2205 	{
2206 	    flags = WSP_ABOVE;
2207 	    if (ll_ref != NULL)
2208 		flags |= WSP_NEWLOC;
2209 	    if (win_split(0, flags) == FAIL)
2210 		goto failed;		/* not enough room for window */
2211 	    opened_window = TRUE;	/* close it when fail */
2212 	    p_swb = empty_option;	/* don't split again */
2213 	    swb_flags = 0;
2214 	    RESET_BINDING(curwin);
2215 	    if (ll_ref != NULL)
2216 	    {
2217 		/* The new window should use the location list from the
2218 		 * location list window */
2219 		curwin->w_llist = ll_ref;
2220 		ll_ref->qf_refcount++;
2221 	    }
2222 	}
2223 	else
2224 	{
2225 	    if (curwin->w_llist_ref != NULL)
2226 	    {
2227 		/* In a location window */
2228 		win = usable_win_ptr;
2229 		if (win == NULL)
2230 		{
2231 		    /* Find the window showing the selected file */
2232 		    FOR_ALL_WINDOWS(win)
2233 			if (win->w_buffer->b_fnum == qf_ptr->qf_fnum)
2234 			    break;
2235 		    if (win == NULL)
2236 		    {
2237 			/* Find a previous usable window */
2238 			win = curwin;
2239 			do
2240 			{
2241 			    if (win->w_buffer->b_p_bt[0] == NUL)
2242 				break;
2243 			    if (win->w_prev == NULL)
2244 				win = lastwin;	/* wrap around the top */
2245 			    else
2246 				win = win->w_prev; /* go to previous window */
2247 			} while (win != curwin);
2248 		    }
2249 		}
2250 		win_goto(win);
2251 
2252 		/* If the location list for the window is not set, then set it
2253 		 * to the location list from the location window */
2254 		if (win->w_llist == NULL)
2255 		{
2256 		    win->w_llist = ll_ref;
2257 		    ll_ref->qf_refcount++;
2258 		}
2259 	    }
2260 	    else
2261 	    {
2262 
2263 	    /*
2264 	     * Try to find a window that shows the right buffer.
2265 	     * Default to the window just above the quickfix buffer.
2266 	     */
2267 	    win = curwin;
2268 	    altwin = NULL;
2269 	    for (;;)
2270 	    {
2271 		if (win->w_buffer->b_fnum == qf_ptr->qf_fnum)
2272 		    break;
2273 		if (win->w_prev == NULL)
2274 		    win = lastwin;	/* wrap around the top */
2275 		else
2276 		    win = win->w_prev;	/* go to previous window */
2277 
2278 		if (IS_QF_WINDOW(win))
2279 		{
2280 		    /* Didn't find it, go to the window before the quickfix
2281 		     * window. */
2282 		    if (altwin != NULL)
2283 			win = altwin;
2284 		    else if (curwin->w_prev != NULL)
2285 			win = curwin->w_prev;
2286 		    else
2287 			win = curwin->w_next;
2288 		    break;
2289 		}
2290 
2291 		/* Remember a usable window. */
2292 		if (altwin == NULL && !win->w_p_pvw
2293 					   && win->w_buffer->b_p_bt[0] == NUL)
2294 		    altwin = win;
2295 	    }
2296 
2297 	    win_goto(win);
2298 	    }
2299 	}
2300     }
2301 #endif
2302 
2303     /*
2304      * If there is a file name,
2305      * read the wanted file if needed, and check autowrite etc.
2306      */
2307     old_curbuf = curbuf;
2308     old_lnum = curwin->w_cursor.lnum;
2309 
2310     if (qf_ptr->qf_fnum != 0)
2311     {
2312 	if (qf_ptr->qf_type == 1)
2313 	{
2314 	    /* Open help file (do_ecmd() will set b_help flag, readfile() will
2315 	     * set b_p_ro flag). */
2316 	    if (!can_abandon(curbuf, forceit))
2317 	    {
2318 		EMSG(_(e_nowrtmsg));
2319 		ok = FALSE;
2320 	    }
2321 	    else
2322 		ok = do_ecmd(qf_ptr->qf_fnum, NULL, NULL, NULL, (linenr_T)1,
2323 					   ECMD_HIDE + ECMD_SET_HELP,
2324 					   oldwin == curwin ? curwin : NULL);
2325 	}
2326 	else
2327 	{
2328 	    int old_qf_curlist = qi->qf_curlist;
2329 	    int is_abort = FALSE;
2330 
2331 	    ok = buflist_getfile(qf_ptr->qf_fnum,
2332 			    (linenr_T)1, GETF_SETMARK | GETF_SWITCH, forceit);
2333 	    if (qi != &ql_info && !win_valid_any_tab(oldwin))
2334 	    {
2335 		EMSG(_("E924: Current window was closed"));
2336 		is_abort = TRUE;
2337 		opened_window = FALSE;
2338 	    }
2339 	    else if (old_qf_curlist != qi->qf_curlist
2340 		    || !is_qf_entry_present(qi, qf_ptr))
2341 	    {
2342 		if (qi == &ql_info)
2343 		    EMSG(_("E925: Current quickfix was changed"));
2344 		else
2345 		    EMSG(_("E926: Current location list was changed"));
2346 		is_abort = TRUE;
2347 	    }
2348 
2349 	    if (is_abort)
2350 	    {
2351 		ok = FALSE;
2352 		qi = NULL;
2353 		qf_ptr = NULL;
2354 	    }
2355 	}
2356     }
2357 
2358     if (ok == OK)
2359     {
2360 	/* When not switched to another buffer, still need to set pc mark */
2361 	if (curbuf == old_curbuf)
2362 	    setpcmark();
2363 
2364 	if (qf_ptr->qf_pattern == NULL)
2365 	{
2366 	    /*
2367 	     * Go to line with error, unless qf_lnum is 0.
2368 	     */
2369 	    i = qf_ptr->qf_lnum;
2370 	    if (i > 0)
2371 	    {
2372 		if (i > curbuf->b_ml.ml_line_count)
2373 		    i = curbuf->b_ml.ml_line_count;
2374 		curwin->w_cursor.lnum = i;
2375 	    }
2376 	    if (qf_ptr->qf_col > 0)
2377 	    {
2378 		curwin->w_cursor.col = qf_ptr->qf_col - 1;
2379 #ifdef FEAT_VIRTUALEDIT
2380 		curwin->w_cursor.coladd = 0;
2381 #endif
2382 		if (qf_ptr->qf_viscol == TRUE)
2383 		{
2384 		    /*
2385 		     * Check each character from the beginning of the error
2386 		     * line up to the error column.  For each tab character
2387 		     * found, reduce the error column value by the length of
2388 		     * a tab character.
2389 		     */
2390 		    line = ml_get_curline();
2391 		    screen_col = 0;
2392 		    for (char_col = 0; char_col < curwin->w_cursor.col; ++char_col)
2393 		    {
2394 			if (*line == NUL)
2395 			    break;
2396 			if (*line++ == '\t')
2397 			{
2398 			    curwin->w_cursor.col -= 7 - (screen_col % 8);
2399 			    screen_col += 8 - (screen_col % 8);
2400 			}
2401 			else
2402 			    ++screen_col;
2403 		    }
2404 		}
2405 		check_cursor();
2406 	    }
2407 	    else
2408 		beginline(BL_WHITE | BL_FIX);
2409 	}
2410 	else
2411 	{
2412 	    pos_T save_cursor;
2413 
2414 	    /* Move the cursor to the first line in the buffer */
2415 	    save_cursor = curwin->w_cursor;
2416 	    curwin->w_cursor.lnum = 0;
2417 	    if (!do_search(NULL, '/', qf_ptr->qf_pattern, (long)1,
2418 						      SEARCH_KEEP, NULL, NULL))
2419 		curwin->w_cursor = save_cursor;
2420 	}
2421 
2422 #ifdef FEAT_FOLDING
2423 	if ((fdo_flags & FDO_QUICKFIX) && old_KeyTyped)
2424 	    foldOpenCursor();
2425 #endif
2426 	if (print_message)
2427 	{
2428 	    /* Update the screen before showing the message, unless the screen
2429 	     * scrolled up. */
2430 	    if (!msg_scrolled)
2431 		update_topline_redraw();
2432 	    sprintf((char *)IObuff, _("(%d of %d)%s%s: "), qf_index,
2433 		    qi->qf_lists[qi->qf_curlist].qf_count,
2434 		    qf_ptr->qf_cleared ? _(" (line deleted)") : "",
2435 		    (char *)qf_types(qf_ptr->qf_type, qf_ptr->qf_nr));
2436 	    /* Add the message, skipping leading whitespace and newlines. */
2437 	    len = (int)STRLEN(IObuff);
2438 	    qf_fmt_text(skipwhite(qf_ptr->qf_text), IObuff + len, IOSIZE - len);
2439 
2440 	    /* Output the message.  Overwrite to avoid scrolling when the 'O'
2441 	     * flag is present in 'shortmess'; But when not jumping, print the
2442 	     * whole message. */
2443 	    i = msg_scroll;
2444 	    if (curbuf == old_curbuf && curwin->w_cursor.lnum == old_lnum)
2445 		msg_scroll = TRUE;
2446 	    else if (!msg_scrolled && shortmess(SHM_OVERALL))
2447 		msg_scroll = FALSE;
2448 	    msg_attr_keep(IObuff, 0, TRUE);
2449 	    msg_scroll = i;
2450 	}
2451     }
2452     else
2453     {
2454 #ifdef FEAT_WINDOWS
2455 	if (opened_window)
2456 	    win_close(curwin, TRUE);    /* Close opened window */
2457 #endif
2458 	if (qf_ptr != NULL && qf_ptr->qf_fnum != 0)
2459 	{
2460 	    /*
2461 	     * Couldn't open file, so put index back where it was.  This could
2462 	     * happen if the file was readonly and we changed something.
2463 	     */
2464 #ifdef FEAT_WINDOWS
2465 failed:
2466 #endif
2467 	    qf_ptr = old_qf_ptr;
2468 	    qf_index = old_qf_index;
2469 	}
2470     }
2471 theend:
2472     if (qi != NULL)
2473     {
2474 	qi->qf_lists[qi->qf_curlist].qf_ptr = qf_ptr;
2475 	qi->qf_lists[qi->qf_curlist].qf_index = qf_index;
2476     }
2477 #ifdef FEAT_WINDOWS
2478     if (p_swb != old_swb && opened_window)
2479     {
2480 	/* Restore old 'switchbuf' value, but not when an autocommand or
2481 	 * modeline has changed the value. */
2482 	if (p_swb == empty_option)
2483 	{
2484 	    p_swb = old_swb;
2485 	    swb_flags = old_swb_flags;
2486 	}
2487 	else
2488 	    free_string_option(old_swb);
2489     }
2490 #endif
2491 }
2492 
2493 /*
2494  * ":clist": list all errors
2495  * ":llist": list all locations
2496  */
2497     void
2498 qf_list(exarg_T *eap)
2499 {
2500     buf_T	*buf;
2501     char_u	*fname;
2502     qfline_T	*qfp;
2503     int		i;
2504     int		idx1 = 1;
2505     int		idx2 = -1;
2506     char_u	*arg = eap->arg;
2507     int		plus = FALSE;
2508     int		all = eap->forceit;	/* if not :cl!, only show
2509 						   recognised errors */
2510     qf_info_T	*qi = &ql_info;
2511 
2512     if (eap->cmdidx == CMD_llist)
2513     {
2514 	qi = GET_LOC_LIST(curwin);
2515 	if (qi == NULL)
2516 	{
2517 	    EMSG(_(e_loclist));
2518 	    return;
2519 	}
2520     }
2521 
2522     if (qi->qf_curlist >= qi->qf_listcount
2523 	|| qi->qf_lists[qi->qf_curlist].qf_count == 0)
2524     {
2525 	EMSG(_(e_quickfix));
2526 	return;
2527     }
2528     if (*arg == '+')
2529     {
2530 	++arg;
2531 	plus = TRUE;
2532     }
2533     if (!get_list_range(&arg, &idx1, &idx2) || *arg != NUL)
2534     {
2535 	EMSG(_(e_trailing));
2536 	return;
2537     }
2538     if (plus)
2539     {
2540 	i = qi->qf_lists[qi->qf_curlist].qf_index;
2541 	idx2 = i + idx1;
2542 	idx1 = i;
2543     }
2544     else
2545     {
2546 	i = qi->qf_lists[qi->qf_curlist].qf_count;
2547 	if (idx1 < 0)
2548 	    idx1 = (-idx1 > i) ? 0 : idx1 + i + 1;
2549 	if (idx2 < 0)
2550 	    idx2 = (-idx2 > i) ? 0 : idx2 + i + 1;
2551     }
2552 
2553     if (qi->qf_lists[qi->qf_curlist].qf_nonevalid)
2554 	all = TRUE;
2555     qfp = qi->qf_lists[qi->qf_curlist].qf_start;
2556     for (i = 1; !got_int && i <= qi->qf_lists[qi->qf_curlist].qf_count; )
2557     {
2558 	if ((qfp->qf_valid || all) && idx1 <= i && i <= idx2)
2559 	{
2560 	    msg_putchar('\n');
2561 	    if (got_int)
2562 		break;
2563 
2564 	    fname = NULL;
2565 	    if (qfp->qf_fnum != 0
2566 			      && (buf = buflist_findnr(qfp->qf_fnum)) != NULL)
2567 	    {
2568 		fname = buf->b_fname;
2569 		if (qfp->qf_type == 1)	/* :helpgrep */
2570 		    fname = gettail(fname);
2571 	    }
2572 	    if (fname == NULL)
2573 		sprintf((char *)IObuff, "%2d", i);
2574 	    else
2575 		vim_snprintf((char *)IObuff, IOSIZE, "%2d %s",
2576 							    i, (char *)fname);
2577 	    msg_outtrans_attr(IObuff, i == qi->qf_lists[qi->qf_curlist].qf_index
2578 					   ? HL_ATTR(HLF_QFL) : HL_ATTR(HLF_D));
2579 	    if (qfp->qf_lnum == 0)
2580 		IObuff[0] = NUL;
2581 	    else if (qfp->qf_col == 0)
2582 		sprintf((char *)IObuff, ":%ld", qfp->qf_lnum);
2583 	    else
2584 		sprintf((char *)IObuff, ":%ld col %d",
2585 						   qfp->qf_lnum, qfp->qf_col);
2586 	    sprintf((char *)IObuff + STRLEN(IObuff), "%s:",
2587 				  (char *)qf_types(qfp->qf_type, qfp->qf_nr));
2588 	    msg_puts_attr(IObuff, HL_ATTR(HLF_N));
2589 	    if (qfp->qf_pattern != NULL)
2590 	    {
2591 		qf_fmt_text(qfp->qf_pattern, IObuff, IOSIZE);
2592 		STRCAT(IObuff, ":");
2593 		msg_puts(IObuff);
2594 	    }
2595 	    msg_puts((char_u *)" ");
2596 
2597 	    /* Remove newlines and leading whitespace from the text.  For an
2598 	     * unrecognized line keep the indent, the compiler may mark a word
2599 	     * with ^^^^. */
2600 	    qf_fmt_text((fname != NULL || qfp->qf_lnum != 0)
2601 				     ? skipwhite(qfp->qf_text) : qfp->qf_text,
2602 							      IObuff, IOSIZE);
2603 	    msg_prt_line(IObuff, FALSE);
2604 	    out_flush();		/* show one line at a time */
2605 	}
2606 
2607 	qfp = qfp->qf_next;
2608 	if (qfp == NULL)
2609 	    break;
2610 	++i;
2611 	ui_breakcheck();
2612     }
2613 }
2614 
2615 /*
2616  * Remove newlines and leading whitespace from an error message.
2617  * Put the result in "buf[bufsize]".
2618  */
2619     static void
2620 qf_fmt_text(char_u *text, char_u *buf, int bufsize)
2621 {
2622     int		i;
2623     char_u	*p = text;
2624 
2625     for (i = 0; *p != NUL && i < bufsize - 1; ++i)
2626     {
2627 	if (*p == '\n')
2628 	{
2629 	    buf[i] = ' ';
2630 	    while (*++p != NUL)
2631 		if (!VIM_ISWHITE(*p) && *p != '\n')
2632 		    break;
2633 	}
2634 	else
2635 	    buf[i] = *p++;
2636     }
2637     buf[i] = NUL;
2638 }
2639 
2640     static void
2641 qf_msg(qf_info_T *qi, int which, char *lead)
2642 {
2643     char   *title = (char *)qi->qf_lists[which].qf_title;
2644     int    count = qi->qf_lists[which].qf_count;
2645     char_u buf[IOSIZE];
2646 
2647     vim_snprintf((char *)buf, IOSIZE, _("%serror list %d of %d; %d errors "),
2648 	    lead,
2649 	    which + 1,
2650 	    qi->qf_listcount,
2651 	    count);
2652 
2653     if (title != NULL)
2654     {
2655 	size_t	len = STRLEN(buf);
2656 
2657 	if (len < 34)
2658 	{
2659 	    vim_memset(buf + len, ' ', 34 - len);
2660 	    buf[34] = NUL;
2661 	}
2662 	vim_strcat(buf, (char_u *)title, IOSIZE);
2663     }
2664     trunc_string(buf, buf, Columns - 1, IOSIZE);
2665     msg(buf);
2666 }
2667 
2668 /*
2669  * ":colder [count]": Up in the quickfix stack.
2670  * ":cnewer [count]": Down in the quickfix stack.
2671  * ":lolder [count]": Up in the location list stack.
2672  * ":lnewer [count]": Down in the location list stack.
2673  */
2674     void
2675 qf_age(exarg_T *eap)
2676 {
2677     qf_info_T	*qi = &ql_info;
2678     int		count;
2679 
2680     if (eap->cmdidx == CMD_lolder || eap->cmdidx == CMD_lnewer)
2681     {
2682 	qi = GET_LOC_LIST(curwin);
2683 	if (qi == NULL)
2684 	{
2685 	    EMSG(_(e_loclist));
2686 	    return;
2687 	}
2688     }
2689 
2690     if (eap->addr_count != 0)
2691 	count = eap->line2;
2692     else
2693 	count = 1;
2694     while (count--)
2695     {
2696 	if (eap->cmdidx == CMD_colder || eap->cmdidx == CMD_lolder)
2697 	{
2698 	    if (qi->qf_curlist == 0)
2699 	    {
2700 		EMSG(_("E380: At bottom of quickfix stack"));
2701 		break;
2702 	    }
2703 	    --qi->qf_curlist;
2704 	}
2705 	else
2706 	{
2707 	    if (qi->qf_curlist >= qi->qf_listcount - 1)
2708 	    {
2709 		EMSG(_("E381: At top of quickfix stack"));
2710 		break;
2711 	    }
2712 	    ++qi->qf_curlist;
2713 	}
2714     }
2715     qf_msg(qi, qi->qf_curlist, "");
2716 #ifdef FEAT_WINDOWS
2717     qf_update_buffer(qi, NULL);
2718 #endif
2719 }
2720 
2721     void
2722 qf_history(exarg_T *eap)
2723 {
2724     qf_info_T	*qi = &ql_info;
2725     int		i;
2726 
2727     if (eap->cmdidx == CMD_lhistory)
2728 	qi = GET_LOC_LIST(curwin);
2729     if (qi == NULL || (qi->qf_listcount == 0
2730 				&& qi->qf_lists[qi->qf_curlist].qf_count == 0))
2731 	MSG(_("No entries"));
2732     else
2733 	for (i = 0; i < qi->qf_listcount; ++i)
2734 	    qf_msg(qi, i, i == qi->qf_curlist ? "> " : "  ");
2735 }
2736 
2737 /*
2738  * Free all the entries in the error list "idx".
2739  */
2740     static void
2741 qf_free(qf_info_T *qi, int idx)
2742 {
2743     qfline_T	*qfp;
2744     qfline_T	*qfpnext;
2745     int		stop = FALSE;
2746 
2747     while (qi->qf_lists[idx].qf_count && qi->qf_lists[idx].qf_start != NULL)
2748     {
2749 	qfp = qi->qf_lists[idx].qf_start;
2750 	qfpnext = qfp->qf_next;
2751 	if (qi->qf_lists[idx].qf_title != NULL && !stop)
2752 	{
2753 	    vim_free(qfp->qf_text);
2754 	    stop = (qfp == qfpnext);
2755 	    vim_free(qfp->qf_pattern);
2756 	    vim_free(qfp);
2757 	    if (stop)
2758 		/* Somehow qf_count may have an incorrect value, set it to 1
2759 		 * to avoid crashing when it's wrong.
2760 		 * TODO: Avoid qf_count being incorrect. */
2761 		qi->qf_lists[idx].qf_count = 1;
2762 	}
2763 	qi->qf_lists[idx].qf_start = qfpnext;
2764 	--qi->qf_lists[idx].qf_count;
2765     }
2766     vim_free(qi->qf_lists[idx].qf_title);
2767     qi->qf_lists[idx].qf_title = NULL;
2768     free_tv(qi->qf_lists[idx].qf_ctx);
2769     qi->qf_lists[idx].qf_ctx = NULL;
2770     qi->qf_lists[idx].qf_index = 0;
2771     qi->qf_lists[idx].qf_start = NULL;
2772     qi->qf_lists[idx].qf_last = NULL;
2773     qi->qf_lists[idx].qf_ptr = NULL;
2774     qi->qf_lists[idx].qf_nonevalid = TRUE;
2775 
2776     qf_clean_dir_stack(&qi->qf_dir_stack);
2777     qi->qf_directory = NULL;
2778     qf_clean_dir_stack(&qi->qf_file_stack);
2779     qi->qf_currfile = NULL;
2780     qi->qf_multiline = FALSE;
2781     qi->qf_multiignore = FALSE;
2782     qi->qf_multiscan = FALSE;
2783 }
2784 
2785 /*
2786  * qf_mark_adjust: adjust marks
2787  */
2788    void
2789 qf_mark_adjust(
2790     win_T	*wp,
2791     linenr_T	line1,
2792     linenr_T	line2,
2793     long	amount,
2794     long	amount_after)
2795 {
2796     int		i;
2797     qfline_T	*qfp;
2798     int		idx;
2799     qf_info_T	*qi = &ql_info;
2800     int		found_one = FALSE;
2801     int		buf_has_flag = wp == NULL ? BUF_HAS_QF_ENTRY : BUF_HAS_LL_ENTRY;
2802 
2803     if (!(curbuf->b_has_qf_entry & buf_has_flag))
2804 	return;
2805     if (wp != NULL)
2806     {
2807 	if (wp->w_llist == NULL)
2808 	    return;
2809 	qi = wp->w_llist;
2810     }
2811 
2812     for (idx = 0; idx < qi->qf_listcount; ++idx)
2813 	if (qi->qf_lists[idx].qf_count)
2814 	    for (i = 0, qfp = qi->qf_lists[idx].qf_start;
2815 		       i < qi->qf_lists[idx].qf_count && qfp != NULL;
2816 		       ++i, qfp = qfp->qf_next)
2817 		if (qfp->qf_fnum == curbuf->b_fnum)
2818 		{
2819 		    found_one = TRUE;
2820 		    if (qfp->qf_lnum >= line1 && qfp->qf_lnum <= line2)
2821 		    {
2822 			if (amount == MAXLNUM)
2823 			    qfp->qf_cleared = TRUE;
2824 			else
2825 			    qfp->qf_lnum += amount;
2826 		    }
2827 		    else if (amount_after && qfp->qf_lnum > line2)
2828 			qfp->qf_lnum += amount_after;
2829 		}
2830 
2831     if (!found_one)
2832 	curbuf->b_has_qf_entry &= ~buf_has_flag;
2833 }
2834 
2835 /*
2836  * Make a nice message out of the error character and the error number:
2837  *  char    number	message
2838  *  e or E    0		" error"
2839  *  w or W    0		" warning"
2840  *  i or I    0		" info"
2841  *  0	      0		""
2842  *  other     0		" c"
2843  *  e or E    n		" error n"
2844  *  w or W    n		" warning n"
2845  *  i or I    n		" info n"
2846  *  0	      n		" error n"
2847  *  other     n		" c n"
2848  *  1	      x		""	:helpgrep
2849  */
2850     static char_u *
2851 qf_types(int c, int nr)
2852 {
2853     static char_u	buf[20];
2854     static char_u	cc[3];
2855     char_u		*p;
2856 
2857     if (c == 'W' || c == 'w')
2858 	p = (char_u *)" warning";
2859     else if (c == 'I' || c == 'i')
2860 	p = (char_u *)" info";
2861     else if (c == 'E' || c == 'e' || (c == 0 && nr > 0))
2862 	p = (char_u *)" error";
2863     else if (c == 0 || c == 1)
2864 	p = (char_u *)"";
2865     else
2866     {
2867 	cc[0] = ' ';
2868 	cc[1] = c;
2869 	cc[2] = NUL;
2870 	p = cc;
2871     }
2872 
2873     if (nr <= 0)
2874 	return p;
2875 
2876     sprintf((char *)buf, "%s %3d", (char *)p, nr);
2877     return buf;
2878 }
2879 
2880 #if defined(FEAT_WINDOWS) || defined(PROTO)
2881 /*
2882  * ":cwindow": open the quickfix window if we have errors to display,
2883  *	       close it if not.
2884  * ":lwindow": open the location list window if we have locations to display,
2885  *	       close it if not.
2886  */
2887     void
2888 ex_cwindow(exarg_T *eap)
2889 {
2890     qf_info_T	*qi = &ql_info;
2891     win_T	*win;
2892 
2893     if (eap->cmdidx == CMD_lwindow)
2894     {
2895 	qi = GET_LOC_LIST(curwin);
2896 	if (qi == NULL)
2897 	    return;
2898     }
2899 
2900     /* Look for an existing quickfix window.  */
2901     win = qf_find_win(qi);
2902 
2903     /*
2904      * If a quickfix window is open but we have no errors to display,
2905      * close the window.  If a quickfix window is not open, then open
2906      * it if we have errors; otherwise, leave it closed.
2907      */
2908     if (qi->qf_lists[qi->qf_curlist].qf_nonevalid
2909 	    || qi->qf_lists[qi->qf_curlist].qf_count == 0
2910 	    || qi->qf_curlist >= qi->qf_listcount)
2911     {
2912 	if (win != NULL)
2913 	    ex_cclose(eap);
2914     }
2915     else if (win == NULL)
2916 	ex_copen(eap);
2917 }
2918 
2919 /*
2920  * ":cclose": close the window showing the list of errors.
2921  * ":lclose": close the window showing the location list
2922  */
2923     void
2924 ex_cclose(exarg_T *eap)
2925 {
2926     win_T	*win = NULL;
2927     qf_info_T	*qi = &ql_info;
2928 
2929     if (eap->cmdidx == CMD_lclose || eap->cmdidx == CMD_lwindow)
2930     {
2931 	qi = GET_LOC_LIST(curwin);
2932 	if (qi == NULL)
2933 	    return;
2934     }
2935 
2936     /* Find existing quickfix window and close it. */
2937     win = qf_find_win(qi);
2938     if (win != NULL)
2939 	win_close(win, FALSE);
2940 }
2941 
2942 /*
2943  * ":copen": open a window that shows the list of errors.
2944  * ":lopen": open a window that shows the location list.
2945  */
2946     void
2947 ex_copen(exarg_T *eap)
2948 {
2949     qf_info_T	*qi = &ql_info;
2950     int		height;
2951     win_T	*win;
2952     tabpage_T	*prevtab = curtab;
2953     buf_T	*qf_buf;
2954     win_T	*oldwin = curwin;
2955 
2956     if (eap->cmdidx == CMD_lopen || eap->cmdidx == CMD_lwindow)
2957     {
2958 	qi = GET_LOC_LIST(curwin);
2959 	if (qi == NULL)
2960 	{
2961 	    EMSG(_(e_loclist));
2962 	    return;
2963 	}
2964     }
2965 
2966     if (eap->addr_count != 0)
2967 	height = eap->line2;
2968     else
2969 	height = QF_WINHEIGHT;
2970 
2971     reset_VIsual_and_resel();			/* stop Visual mode */
2972 #ifdef FEAT_GUI
2973     need_mouse_correct = TRUE;
2974 #endif
2975 
2976     /*
2977      * Find existing quickfix window, or open a new one.
2978      */
2979     win = qf_find_win(qi);
2980 
2981     if (win != NULL && cmdmod.tab == 0)
2982     {
2983 	win_goto(win);
2984 	if (eap->addr_count != 0)
2985 	{
2986 	    if (cmdmod.split & WSP_VERT)
2987 	    {
2988 		if (height != W_WIDTH(win))
2989 		    win_setwidth(height);
2990 	    }
2991 	    else if (height != win->w_height)
2992 		win_setheight(height);
2993 	}
2994     }
2995     else
2996     {
2997 	qf_buf = qf_find_buf(qi);
2998 
2999 	/* The current window becomes the previous window afterwards. */
3000 	win = curwin;
3001 
3002 	if ((eap->cmdidx == CMD_copen || eap->cmdidx == CMD_cwindow)
3003 		&& cmdmod.split == 0)
3004 	    /* Create the new window at the very bottom, except when
3005 	     * :belowright or :aboveleft is used. */
3006 	    win_goto(lastwin);
3007 	if (win_split(height, WSP_BELOW | WSP_NEWLOC) == FAIL)
3008 	    return;		/* not enough room for window */
3009 	RESET_BINDING(curwin);
3010 
3011 	if (eap->cmdidx == CMD_lopen || eap->cmdidx == CMD_lwindow)
3012 	{
3013 	    /*
3014 	     * For the location list window, create a reference to the
3015 	     * location list from the window 'win'.
3016 	     */
3017 	    curwin->w_llist_ref = win->w_llist;
3018 	    win->w_llist->qf_refcount++;
3019 	}
3020 
3021 	if (oldwin != curwin)
3022 	    oldwin = NULL;  /* don't store info when in another window */
3023 	if (qf_buf != NULL)
3024 	    /* Use the existing quickfix buffer */
3025 	    (void)do_ecmd(qf_buf->b_fnum, NULL, NULL, NULL, ECMD_ONE,
3026 					     ECMD_HIDE + ECMD_OLDBUF, oldwin);
3027 	else
3028 	{
3029 	    /* Create a new quickfix buffer */
3030 	    (void)do_ecmd(0, NULL, NULL, NULL, ECMD_ONE, ECMD_HIDE, oldwin);
3031 	    /* switch off 'swapfile' */
3032 	    set_option_value((char_u *)"swf", 0L, NULL, OPT_LOCAL);
3033 	    set_option_value((char_u *)"bt", 0L, (char_u *)"quickfix",
3034 								   OPT_LOCAL);
3035 	    set_option_value((char_u *)"bh", 0L, (char_u *)"wipe", OPT_LOCAL);
3036 	    RESET_BINDING(curwin);
3037 #ifdef FEAT_DIFF
3038 	    curwin->w_p_diff = FALSE;
3039 #endif
3040 #ifdef FEAT_FOLDING
3041 	    set_option_value((char_u *)"fdm", 0L, (char_u *)"manual",
3042 								   OPT_LOCAL);
3043 #endif
3044 	}
3045 
3046 	/* Only set the height when still in the same tab page and there is no
3047 	 * window to the side. */
3048 	if (curtab == prevtab && curwin->w_width == Columns)
3049 	    win_setheight(height);
3050 	curwin->w_p_wfh = TRUE;	    /* set 'winfixheight' */
3051 	if (win_valid(win))
3052 	    prevwin = win;
3053     }
3054 
3055     qf_set_title_var(qi);
3056 
3057     /*
3058      * Fill the buffer with the quickfix list.
3059      */
3060     qf_fill_buffer(qi, curbuf, NULL);
3061 
3062     curwin->w_cursor.lnum = qi->qf_lists[qi->qf_curlist].qf_index;
3063     curwin->w_cursor.col = 0;
3064     check_cursor();
3065     update_topline();		/* scroll to show the line */
3066 }
3067 
3068 /*
3069  * Move the cursor in the quickfix window to "lnum".
3070  */
3071     static void
3072 qf_win_goto(win_T *win, linenr_T lnum)
3073 {
3074     win_T	*old_curwin = curwin;
3075 
3076     curwin = win;
3077     curbuf = win->w_buffer;
3078     curwin->w_cursor.lnum = lnum;
3079     curwin->w_cursor.col = 0;
3080 #ifdef FEAT_VIRTUALEDIT
3081     curwin->w_cursor.coladd = 0;
3082 #endif
3083     curwin->w_curswant = 0;
3084     update_topline();		/* scroll to show the line */
3085     redraw_later(VALID);
3086     curwin->w_redr_status = TRUE;	/* update ruler */
3087     curwin = old_curwin;
3088     curbuf = curwin->w_buffer;
3089 }
3090 
3091 /*
3092  * :cbottom/:lbottom commands.
3093  */
3094     void
3095 ex_cbottom(exarg_T *eap UNUSED)
3096 {
3097     qf_info_T	*qi = &ql_info;
3098     win_T	*win;
3099 
3100     if (eap->cmdidx == CMD_lbottom)
3101     {
3102 	qi = GET_LOC_LIST(curwin);
3103 	if (qi == NULL)
3104 	{
3105 	    EMSG(_(e_loclist));
3106 	    return;
3107 	}
3108     }
3109 
3110     win = qf_find_win(qi);
3111     if (win != NULL && win->w_cursor.lnum != win->w_buffer->b_ml.ml_line_count)
3112 	qf_win_goto(win, win->w_buffer->b_ml.ml_line_count);
3113 }
3114 
3115 /*
3116  * Return the number of the current entry (line number in the quickfix
3117  * window).
3118  */
3119      linenr_T
3120 qf_current_entry(win_T *wp)
3121 {
3122     qf_info_T	*qi = &ql_info;
3123 
3124     if (IS_LL_WINDOW(wp))
3125 	/* In the location list window, use the referenced location list */
3126 	qi = wp->w_llist_ref;
3127 
3128     return qi->qf_lists[qi->qf_curlist].qf_index;
3129 }
3130 
3131 /*
3132  * Update the cursor position in the quickfix window to the current error.
3133  * Return TRUE if there is a quickfix window.
3134  */
3135     static int
3136 qf_win_pos_update(
3137     qf_info_T	*qi,
3138     int		old_qf_index)	/* previous qf_index or zero */
3139 {
3140     win_T	*win;
3141     int		qf_index = qi->qf_lists[qi->qf_curlist].qf_index;
3142 
3143     /*
3144      * Put the cursor on the current error in the quickfix window, so that
3145      * it's viewable.
3146      */
3147     win = qf_find_win(qi);
3148     if (win != NULL
3149 	    && qf_index <= win->w_buffer->b_ml.ml_line_count
3150 	    && old_qf_index != qf_index)
3151     {
3152 	if (qf_index > old_qf_index)
3153 	{
3154 	    win->w_redraw_top = old_qf_index;
3155 	    win->w_redraw_bot = qf_index;
3156 	}
3157 	else
3158 	{
3159 	    win->w_redraw_top = qf_index;
3160 	    win->w_redraw_bot = old_qf_index;
3161 	}
3162 	qf_win_goto(win, qf_index);
3163     }
3164     return win != NULL;
3165 }
3166 
3167 /*
3168  * Check whether the given window is displaying the specified quickfix/location
3169  * list buffer
3170  */
3171     static int
3172 is_qf_win(win_T *win, qf_info_T *qi)
3173 {
3174     /*
3175      * A window displaying the quickfix buffer will have the w_llist_ref field
3176      * set to NULL.
3177      * A window displaying a location list buffer will have the w_llist_ref
3178      * pointing to the location list.
3179      */
3180     if (bt_quickfix(win->w_buffer))
3181 	if ((qi == &ql_info && win->w_llist_ref == NULL)
3182 		|| (qi != &ql_info && win->w_llist_ref == qi))
3183 	    return TRUE;
3184 
3185     return FALSE;
3186 }
3187 
3188 /*
3189  * Find a window displaying the quickfix/location list 'qi'
3190  * Searches in only the windows opened in the current tab.
3191  */
3192     static win_T *
3193 qf_find_win(qf_info_T *qi)
3194 {
3195     win_T	*win;
3196 
3197     FOR_ALL_WINDOWS(win)
3198 	if (is_qf_win(win, qi))
3199 	    break;
3200 
3201     return win;
3202 }
3203 
3204 /*
3205  * Find a quickfix buffer.
3206  * Searches in windows opened in all the tabs.
3207  */
3208     static buf_T *
3209 qf_find_buf(qf_info_T *qi)
3210 {
3211     tabpage_T	*tp;
3212     win_T	*win;
3213 
3214     FOR_ALL_TAB_WINDOWS(tp, win)
3215 	if (is_qf_win(win, qi))
3216 	    return win->w_buffer;
3217 
3218     return NULL;
3219 }
3220 
3221 /*
3222  * Update the w:quickfix_title variable in the quickfix/location list window
3223  */
3224     static void
3225 qf_update_win_titlevar(qf_info_T *qi)
3226 {
3227     win_T	*win;
3228     win_T	*curwin_save;
3229 
3230     if ((win = qf_find_win(qi)) != NULL)
3231     {
3232 	curwin_save = curwin;
3233 	curwin = win;
3234 	qf_set_title_var(qi);
3235 	curwin = curwin_save;
3236     }
3237 }
3238 
3239 /*
3240  * Find the quickfix buffer.  If it exists, update the contents.
3241  */
3242     static void
3243 qf_update_buffer(qf_info_T *qi, qfline_T *old_last)
3244 {
3245     buf_T	*buf;
3246     win_T	*win;
3247     aco_save_T	aco;
3248 
3249     /* Check if a buffer for the quickfix list exists.  Update it. */
3250     buf = qf_find_buf(qi);
3251     if (buf != NULL)
3252     {
3253 	linenr_T	old_line_count = buf->b_ml.ml_line_count;
3254 
3255 	if (old_last == NULL)
3256 	    /* set curwin/curbuf to buf and save a few things */
3257 	    aucmd_prepbuf(&aco, buf);
3258 
3259 	qf_update_win_titlevar(qi);
3260 
3261 	qf_fill_buffer(qi, buf, old_last);
3262 
3263 	if (old_last == NULL)
3264 	{
3265 	    (void)qf_win_pos_update(qi, 0);
3266 
3267 	    /* restore curwin/curbuf and a few other things */
3268 	    aucmd_restbuf(&aco);
3269 	}
3270 
3271 	/* Only redraw when added lines are visible.  This avoids flickering
3272 	 * when the added lines are not visible. */
3273 	if ((win = qf_find_win(qi)) != NULL && old_line_count < win->w_botline)
3274 	    redraw_buf_later(buf, NOT_VALID);
3275     }
3276 }
3277 
3278 /*
3279  * Set "w:quickfix_title" if "qi" has a title.
3280  */
3281     static void
3282 qf_set_title_var(qf_info_T *qi)
3283 {
3284     if (qi->qf_lists[qi->qf_curlist].qf_title != NULL)
3285 	set_internal_string_var((char_u *)"w:quickfix_title",
3286 				    qi->qf_lists[qi->qf_curlist].qf_title);
3287 }
3288 
3289 /*
3290  * Fill current buffer with quickfix errors, replacing any previous contents.
3291  * curbuf must be the quickfix buffer!
3292  * If "old_last" is not NULL append the items after this one.
3293  * When "old_last" is NULL then "buf" must equal "curbuf"!  Because
3294  * ml_delete() is used and autocommands will be triggered.
3295  */
3296     static void
3297 qf_fill_buffer(qf_info_T *qi, buf_T *buf, qfline_T *old_last)
3298 {
3299     linenr_T	lnum;
3300     qfline_T	*qfp;
3301     buf_T	*errbuf;
3302     int		len;
3303     int		old_KeyTyped = KeyTyped;
3304 
3305     if (old_last == NULL)
3306     {
3307 	if (buf != curbuf)
3308 	{
3309 	    internal_error("qf_fill_buffer()");
3310 	    return;
3311 	}
3312 
3313 	/* delete all existing lines */
3314 	while ((curbuf->b_ml.ml_flags & ML_EMPTY) == 0)
3315 	    (void)ml_delete((linenr_T)1, FALSE);
3316     }
3317 
3318     /* Check if there is anything to display */
3319     if (qi->qf_curlist < qi->qf_listcount)
3320     {
3321 	/* Add one line for each error */
3322 	if (old_last == NULL)
3323 	{
3324 	    qfp = qi->qf_lists[qi->qf_curlist].qf_start;
3325 	    lnum = 0;
3326 	}
3327 	else
3328 	{
3329 	    qfp = old_last->qf_next;
3330 	    lnum = buf->b_ml.ml_line_count;
3331 	}
3332 	while (lnum < qi->qf_lists[qi->qf_curlist].qf_count)
3333 	{
3334 	    if (qfp->qf_fnum != 0
3335 		    && (errbuf = buflist_findnr(qfp->qf_fnum)) != NULL
3336 		    && errbuf->b_fname != NULL)
3337 	    {
3338 		if (qfp->qf_type == 1)	/* :helpgrep */
3339 		    STRCPY(IObuff, gettail(errbuf->b_fname));
3340 		else
3341 		    STRCPY(IObuff, errbuf->b_fname);
3342 		len = (int)STRLEN(IObuff);
3343 	    }
3344 	    else
3345 		len = 0;
3346 	    IObuff[len++] = '|';
3347 
3348 	    if (qfp->qf_lnum > 0)
3349 	    {
3350 		sprintf((char *)IObuff + len, "%ld", qfp->qf_lnum);
3351 		len += (int)STRLEN(IObuff + len);
3352 
3353 		if (qfp->qf_col > 0)
3354 		{
3355 		    sprintf((char *)IObuff + len, " col %d", qfp->qf_col);
3356 		    len += (int)STRLEN(IObuff + len);
3357 		}
3358 
3359 		sprintf((char *)IObuff + len, "%s",
3360 				  (char *)qf_types(qfp->qf_type, qfp->qf_nr));
3361 		len += (int)STRLEN(IObuff + len);
3362 	    }
3363 	    else if (qfp->qf_pattern != NULL)
3364 	    {
3365 		qf_fmt_text(qfp->qf_pattern, IObuff + len, IOSIZE - len);
3366 		len += (int)STRLEN(IObuff + len);
3367 	    }
3368 	    IObuff[len++] = '|';
3369 	    IObuff[len++] = ' ';
3370 
3371 	    /* Remove newlines and leading whitespace from the text.
3372 	     * For an unrecognized line keep the indent, the compiler may
3373 	     * mark a word with ^^^^. */
3374 	    qf_fmt_text(len > 3 ? skipwhite(qfp->qf_text) : qfp->qf_text,
3375 						  IObuff + len, IOSIZE - len);
3376 
3377 	    if (ml_append_buf(buf, lnum, IObuff,
3378 				  (colnr_T)STRLEN(IObuff) + 1, FALSE) == FAIL)
3379 		break;
3380 	    ++lnum;
3381 	    qfp = qfp->qf_next;
3382 	    if (qfp == NULL)
3383 		break;
3384 	}
3385 
3386 	if (old_last == NULL)
3387 	    /* Delete the empty line which is now at the end */
3388 	    (void)ml_delete(lnum + 1, FALSE);
3389     }
3390 
3391     /* correct cursor position */
3392     check_lnums(TRUE);
3393 
3394     if (old_last == NULL)
3395     {
3396 	/* Set the 'filetype' to "qf" each time after filling the buffer.
3397 	 * This resembles reading a file into a buffer, it's more logical when
3398 	 * using autocommands. */
3399 	set_option_value((char_u *)"ft", 0L, (char_u *)"qf", OPT_LOCAL);
3400 	curbuf->b_p_ma = FALSE;
3401 
3402 #ifdef FEAT_AUTOCMD
3403 	keep_filetype = TRUE;		/* don't detect 'filetype' */
3404 	apply_autocmds(EVENT_BUFREADPOST, (char_u *)"quickfix", NULL,
3405 							       FALSE, curbuf);
3406 	apply_autocmds(EVENT_BUFWINENTER, (char_u *)"quickfix", NULL,
3407 							       FALSE, curbuf);
3408 	keep_filetype = FALSE;
3409 #endif
3410 	/* make sure it will be redrawn */
3411 	redraw_curbuf_later(NOT_VALID);
3412     }
3413 
3414     /* Restore KeyTyped, setting 'filetype' may reset it. */
3415     KeyTyped = old_KeyTyped;
3416 }
3417 
3418 #endif /* FEAT_WINDOWS */
3419 
3420 /*
3421  * Return TRUE if "buf" is the quickfix buffer.
3422  */
3423     int
3424 bt_quickfix(buf_T *buf)
3425 {
3426     return buf != NULL && buf->b_p_bt[0] == 'q';
3427 }
3428 
3429 /*
3430  * Return TRUE if "buf" is a "nofile" or "acwrite" buffer.
3431  * This means the buffer name is not a file name.
3432  */
3433     int
3434 bt_nofile(buf_T *buf)
3435 {
3436     return buf != NULL && ((buf->b_p_bt[0] == 'n' && buf->b_p_bt[2] == 'f')
3437 	    || buf->b_p_bt[0] == 'a');
3438 }
3439 
3440 /*
3441  * Return TRUE if "buf" is a "nowrite" or "nofile" buffer.
3442  */
3443     int
3444 bt_dontwrite(buf_T *buf)
3445 {
3446     return buf != NULL && buf->b_p_bt[0] == 'n';
3447 }
3448 
3449     int
3450 bt_dontwrite_msg(buf_T *buf)
3451 {
3452     if (bt_dontwrite(buf))
3453     {
3454 	EMSG(_("E382: Cannot write, 'buftype' option is set"));
3455 	return TRUE;
3456     }
3457     return FALSE;
3458 }
3459 
3460 /*
3461  * Return TRUE if the buffer should be hidden, according to 'hidden', ":hide"
3462  * and 'bufhidden'.
3463  */
3464     int
3465 buf_hide(buf_T *buf)
3466 {
3467     /* 'bufhidden' overrules 'hidden' and ":hide", check it first */
3468     switch (buf->b_p_bh[0])
3469     {
3470 	case 'u':		    /* "unload" */
3471 	case 'w':		    /* "wipe" */
3472 	case 'd': return FALSE;	    /* "delete" */
3473 	case 'h': return TRUE;	    /* "hide" */
3474     }
3475     return (p_hid || cmdmod.hide);
3476 }
3477 
3478 /*
3479  * Return TRUE when using ":vimgrep" for ":grep".
3480  */
3481     int
3482 grep_internal(cmdidx_T cmdidx)
3483 {
3484     return ((cmdidx == CMD_grep
3485 		|| cmdidx == CMD_lgrep
3486 		|| cmdidx == CMD_grepadd
3487 		|| cmdidx == CMD_lgrepadd)
3488 	    && STRCMP("internal",
3489 			*curbuf->b_p_gp == NUL ? p_gp : curbuf->b_p_gp) == 0);
3490 }
3491 
3492 /*
3493  * Used for ":make", ":lmake", ":grep", ":lgrep", ":grepadd", and ":lgrepadd"
3494  */
3495     void
3496 ex_make(exarg_T *eap)
3497 {
3498     char_u	*fname;
3499     char_u	*cmd;
3500     char_u	*enc = NULL;
3501     unsigned	len;
3502     win_T	*wp = NULL;
3503     qf_info_T	*qi = &ql_info;
3504     int		res;
3505 #ifdef FEAT_AUTOCMD
3506     char_u	*au_name = NULL;
3507 
3508     /* Redirect ":grep" to ":vimgrep" if 'grepprg' is "internal". */
3509     if (grep_internal(eap->cmdidx))
3510     {
3511 	ex_vimgrep(eap);
3512 	return;
3513     }
3514 
3515     switch (eap->cmdidx)
3516     {
3517 	case CMD_make:	    au_name = (char_u *)"make"; break;
3518 	case CMD_lmake:	    au_name = (char_u *)"lmake"; break;
3519 	case CMD_grep:	    au_name = (char_u *)"grep"; break;
3520 	case CMD_lgrep:	    au_name = (char_u *)"lgrep"; break;
3521 	case CMD_grepadd:   au_name = (char_u *)"grepadd"; break;
3522 	case CMD_lgrepadd:  au_name = (char_u *)"lgrepadd"; break;
3523 	default: break;
3524     }
3525     if (au_name != NULL && apply_autocmds(EVENT_QUICKFIXCMDPRE, au_name,
3526 					       curbuf->b_fname, TRUE, curbuf))
3527     {
3528 # ifdef FEAT_EVAL
3529 	if (aborting())
3530 	    return;
3531 # endif
3532     }
3533 #endif
3534 #ifdef FEAT_MBYTE
3535     enc = (*curbuf->b_p_menc != NUL) ? curbuf->b_p_menc : p_menc;
3536 #endif
3537 
3538     if (eap->cmdidx == CMD_lmake || eap->cmdidx == CMD_lgrep
3539 	|| eap->cmdidx == CMD_lgrepadd)
3540 	wp = curwin;
3541 
3542     autowrite_all();
3543     fname = get_mef_name();
3544     if (fname == NULL)
3545 	return;
3546     mch_remove(fname);	    /* in case it's not unique */
3547 
3548     /*
3549      * If 'shellpipe' empty: don't redirect to 'errorfile'.
3550      */
3551     len = (unsigned)STRLEN(p_shq) * 2 + (unsigned)STRLEN(eap->arg) + 1;
3552     if (*p_sp != NUL)
3553 	len += (unsigned)STRLEN(p_sp) + (unsigned)STRLEN(fname) + 3;
3554     cmd = alloc(len);
3555     if (cmd == NULL)
3556 	return;
3557     sprintf((char *)cmd, "%s%s%s", (char *)p_shq, (char *)eap->arg,
3558 							       (char *)p_shq);
3559     if (*p_sp != NUL)
3560 	append_redir(cmd, len, p_sp, fname);
3561     /*
3562      * Output a newline if there's something else than the :make command that
3563      * was typed (in which case the cursor is in column 0).
3564      */
3565     if (msg_col == 0)
3566 	msg_didout = FALSE;
3567     msg_start();
3568     MSG_PUTS(":!");
3569     msg_outtrans(cmd);		/* show what we are doing */
3570 
3571     /* let the shell know if we are redirecting output or not */
3572     do_shell(cmd, *p_sp != NUL ? SHELL_DOOUT : 0);
3573 
3574 #ifdef AMIGA
3575     out_flush();
3576 		/* read window status report and redraw before message */
3577     (void)char_avail();
3578 #endif
3579 
3580     res = qf_init(wp, fname, (eap->cmdidx != CMD_make
3581 			    && eap->cmdidx != CMD_lmake) ? p_gefm : p_efm,
3582 					   (eap->cmdidx != CMD_grepadd
3583 					    && eap->cmdidx != CMD_lgrepadd),
3584 					   *eap->cmdlinep, enc);
3585     if (wp != NULL)
3586 	qi = GET_LOC_LIST(wp);
3587 #ifdef FEAT_AUTOCMD
3588     if (au_name != NULL)
3589     {
3590 	apply_autocmds(EVENT_QUICKFIXCMDPOST, au_name,
3591 					       curbuf->b_fname, TRUE, curbuf);
3592 	if (qi->qf_curlist < qi->qf_listcount)
3593 	    res = qi->qf_lists[qi->qf_curlist].qf_count;
3594 	else
3595 	    res = 0;
3596     }
3597 #endif
3598     if (res > 0 && !eap->forceit)
3599 	qf_jump(qi, 0, 0, FALSE);		/* display first error */
3600 
3601     mch_remove(fname);
3602     vim_free(fname);
3603     vim_free(cmd);
3604 }
3605 
3606 /*
3607  * Return the name for the errorfile, in allocated memory.
3608  * Find a new unique name when 'makeef' contains "##".
3609  * Returns NULL for error.
3610  */
3611     static char_u *
3612 get_mef_name(void)
3613 {
3614     char_u	*p;
3615     char_u	*name;
3616     static int	start = -1;
3617     static int	off = 0;
3618 #ifdef HAVE_LSTAT
3619     stat_T	sb;
3620 #endif
3621 
3622     if (*p_mef == NUL)
3623     {
3624 	name = vim_tempname('e', FALSE);
3625 	if (name == NULL)
3626 	    EMSG(_(e_notmp));
3627 	return name;
3628     }
3629 
3630     for (p = p_mef; *p; ++p)
3631 	if (p[0] == '#' && p[1] == '#')
3632 	    break;
3633 
3634     if (*p == NUL)
3635 	return vim_strsave(p_mef);
3636 
3637     /* Keep trying until the name doesn't exist yet. */
3638     for (;;)
3639     {
3640 	if (start == -1)
3641 	    start = mch_get_pid();
3642 	else
3643 	    off += 19;
3644 
3645 	name = alloc((unsigned)STRLEN(p_mef) + 30);
3646 	if (name == NULL)
3647 	    break;
3648 	STRCPY(name, p_mef);
3649 	sprintf((char *)name + (p - p_mef), "%d%d", start, off);
3650 	STRCAT(name, p + 2);
3651 	if (mch_getperm(name) < 0
3652 #ifdef HAVE_LSTAT
3653 		    /* Don't accept a symbolic link, it's a security risk. */
3654 		    && mch_lstat((char *)name, &sb) < 0
3655 #endif
3656 		)
3657 	    break;
3658 	vim_free(name);
3659     }
3660     return name;
3661 }
3662 
3663 /*
3664  * Returns the number of valid entries in the current quickfix/location list.
3665  */
3666     int
3667 qf_get_size(exarg_T *eap)
3668 {
3669     qf_info_T	*qi = &ql_info;
3670     qfline_T	*qfp;
3671     int		i, sz = 0;
3672     int		prev_fnum = 0;
3673 
3674     if (eap->cmdidx == CMD_ldo || eap->cmdidx == CMD_lfdo)
3675     {
3676 	/* Location list */
3677 	qi = GET_LOC_LIST(curwin);
3678 	if (qi == NULL)
3679 	    return 0;
3680     }
3681 
3682     for (i = 0, qfp = qi->qf_lists[qi->qf_curlist].qf_start;
3683 	    i < qi->qf_lists[qi->qf_curlist].qf_count && qfp != NULL;
3684 	    ++i, qfp = qfp->qf_next)
3685     {
3686 	if (qfp->qf_valid)
3687 	{
3688 	    if (eap->cmdidx == CMD_cdo || eap->cmdidx == CMD_ldo)
3689 		sz++;	/* Count all valid entries */
3690 	    else if (qfp->qf_fnum > 0 && qfp->qf_fnum != prev_fnum)
3691 	    {
3692 		/* Count the number of files */
3693 		sz++;
3694 		prev_fnum = qfp->qf_fnum;
3695 	    }
3696 	}
3697     }
3698 
3699     return sz;
3700 }
3701 
3702 /*
3703  * Returns the current index of the quickfix/location list.
3704  * Returns 0 if there is an error.
3705  */
3706     int
3707 qf_get_cur_idx(exarg_T *eap)
3708 {
3709     qf_info_T	*qi = &ql_info;
3710 
3711     if (eap->cmdidx == CMD_ldo || eap->cmdidx == CMD_lfdo)
3712     {
3713 	/* Location list */
3714 	qi = GET_LOC_LIST(curwin);
3715 	if (qi == NULL)
3716 	    return 0;
3717     }
3718 
3719     return qi->qf_lists[qi->qf_curlist].qf_index;
3720 }
3721 
3722 /*
3723  * Returns the current index in the quickfix/location list (counting only valid
3724  * entries). If no valid entries are in the list, then returns 1.
3725  */
3726     int
3727 qf_get_cur_valid_idx(exarg_T *eap)
3728 {
3729     qf_info_T	*qi = &ql_info;
3730     qf_list_T	*qfl;
3731     qfline_T	*qfp;
3732     int		i, eidx = 0;
3733     int		prev_fnum = 0;
3734 
3735     if (eap->cmdidx == CMD_ldo || eap->cmdidx == CMD_lfdo)
3736     {
3737 	/* Location list */
3738 	qi = GET_LOC_LIST(curwin);
3739 	if (qi == NULL)
3740 	    return 1;
3741     }
3742 
3743     qfl = &qi->qf_lists[qi->qf_curlist];
3744     qfp = qfl->qf_start;
3745 
3746     /* check if the list has valid errors */
3747     if (qfl->qf_count <= 0 || qfl->qf_nonevalid)
3748 	return 1;
3749 
3750     for (i = 1; i <= qfl->qf_index && qfp!= NULL; i++, qfp = qfp->qf_next)
3751     {
3752 	if (qfp->qf_valid)
3753 	{
3754 	    if (eap->cmdidx == CMD_cfdo || eap->cmdidx == CMD_lfdo)
3755 	    {
3756 		if (qfp->qf_fnum > 0 && qfp->qf_fnum != prev_fnum)
3757 		{
3758 		    /* Count the number of files */
3759 		    eidx++;
3760 		    prev_fnum = qfp->qf_fnum;
3761 		}
3762 	    }
3763 	    else
3764 		eidx++;
3765 	}
3766     }
3767 
3768     return eidx ? eidx : 1;
3769 }
3770 
3771 /*
3772  * Get the 'n'th valid error entry in the quickfix or location list.
3773  * Used by :cdo, :ldo, :cfdo and :lfdo commands.
3774  * For :cdo and :ldo returns the 'n'th valid error entry.
3775  * For :cfdo and :lfdo returns the 'n'th valid file entry.
3776  */
3777     static int
3778 qf_get_nth_valid_entry(qf_info_T *qi, int n, int fdo)
3779 {
3780     qf_list_T	*qfl = &qi->qf_lists[qi->qf_curlist];
3781     qfline_T	*qfp = qfl->qf_start;
3782     int		i, eidx;
3783     int		prev_fnum = 0;
3784 
3785     /* check if the list has valid errors */
3786     if (qfl->qf_count <= 0 || qfl->qf_nonevalid)
3787 	return 1;
3788 
3789     for (i = 1, eidx = 0; i <= qfl->qf_count && qfp != NULL;
3790 	    i++, qfp = qfp->qf_next)
3791     {
3792 	if (qfp->qf_valid)
3793 	{
3794 	    if (fdo)
3795 	    {
3796 		if (qfp->qf_fnum > 0 && qfp->qf_fnum != prev_fnum)
3797 		{
3798 		    /* Count the number of files */
3799 		    eidx++;
3800 		    prev_fnum = qfp->qf_fnum;
3801 		}
3802 	    }
3803 	    else
3804 		eidx++;
3805 	}
3806 
3807 	if (eidx == n)
3808 	    break;
3809     }
3810 
3811     if (i <= qfl->qf_count)
3812 	return i;
3813     else
3814 	return 1;
3815 }
3816 
3817 /*
3818  * ":cc", ":crewind", ":cfirst" and ":clast".
3819  * ":ll", ":lrewind", ":lfirst" and ":llast".
3820  * ":cdo", ":ldo", ":cfdo" and ":lfdo"
3821  */
3822     void
3823 ex_cc(exarg_T *eap)
3824 {
3825     qf_info_T	*qi = &ql_info;
3826     int		errornr;
3827 
3828     if (eap->cmdidx == CMD_ll
3829 	    || eap->cmdidx == CMD_lrewind
3830 	    || eap->cmdidx == CMD_lfirst
3831 	    || eap->cmdidx == CMD_llast
3832 	    || eap->cmdidx == CMD_ldo
3833 	    || eap->cmdidx == CMD_lfdo)
3834     {
3835 	qi = GET_LOC_LIST(curwin);
3836 	if (qi == NULL)
3837 	{
3838 	    EMSG(_(e_loclist));
3839 	    return;
3840 	}
3841     }
3842 
3843     if (eap->addr_count > 0)
3844 	errornr = (int)eap->line2;
3845     else
3846     {
3847 	if (eap->cmdidx == CMD_cc || eap->cmdidx == CMD_ll)
3848 	    errornr = 0;
3849 	else if (eap->cmdidx == CMD_crewind || eap->cmdidx == CMD_lrewind
3850 		|| eap->cmdidx == CMD_cfirst || eap->cmdidx == CMD_lfirst)
3851 	    errornr = 1;
3852 	else
3853 	    errornr = 32767;
3854     }
3855 
3856     /* For cdo and ldo commands, jump to the nth valid error.
3857      * For cfdo and lfdo commands, jump to the nth valid file entry.
3858      */
3859     if (eap->cmdidx == CMD_cdo || eap->cmdidx == CMD_ldo ||
3860 	    eap->cmdidx == CMD_cfdo || eap->cmdidx == CMD_lfdo)
3861 	errornr = qf_get_nth_valid_entry(qi,
3862 		eap->addr_count > 0 ? (int)eap->line1 : 1,
3863 		eap->cmdidx == CMD_cfdo || eap->cmdidx == CMD_lfdo);
3864 
3865     qf_jump(qi, 0, errornr, eap->forceit);
3866 }
3867 
3868 /*
3869  * ":cnext", ":cnfile", ":cNext" and ":cprevious".
3870  * ":lnext", ":lNext", ":lprevious", ":lnfile", ":lNfile" and ":lpfile".
3871  * Also, used by ":cdo", ":ldo", ":cfdo" and ":lfdo" commands.
3872  */
3873     void
3874 ex_cnext(exarg_T *eap)
3875 {
3876     qf_info_T	*qi = &ql_info;
3877     int		errornr;
3878 
3879     if (eap->cmdidx == CMD_lnext
3880 	    || eap->cmdidx == CMD_lNext
3881 	    || eap->cmdidx == CMD_lprevious
3882 	    || eap->cmdidx == CMD_lnfile
3883 	    || eap->cmdidx == CMD_lNfile
3884 	    || eap->cmdidx == CMD_lpfile
3885 	    || eap->cmdidx == CMD_ldo
3886 	    || eap->cmdidx == CMD_lfdo)
3887     {
3888 	qi = GET_LOC_LIST(curwin);
3889 	if (qi == NULL)
3890 	{
3891 	    EMSG(_(e_loclist));
3892 	    return;
3893 	}
3894     }
3895 
3896     if (eap->addr_count > 0 &&
3897 	    (eap->cmdidx != CMD_cdo && eap->cmdidx != CMD_ldo &&
3898 	     eap->cmdidx != CMD_cfdo && eap->cmdidx != CMD_lfdo))
3899 	errornr = (int)eap->line2;
3900     else
3901 	errornr = 1;
3902 
3903     qf_jump(qi, (eap->cmdidx == CMD_cnext || eap->cmdidx == CMD_lnext
3904 		|| eap->cmdidx == CMD_cdo || eap->cmdidx == CMD_ldo)
3905 	    ? FORWARD
3906 	    : (eap->cmdidx == CMD_cnfile || eap->cmdidx == CMD_lnfile
3907 		|| eap->cmdidx == CMD_cfdo || eap->cmdidx == CMD_lfdo)
3908 		? FORWARD_FILE
3909 		: (eap->cmdidx == CMD_cpfile || eap->cmdidx == CMD_lpfile
3910 		   || eap->cmdidx == CMD_cNfile || eap->cmdidx == CMD_lNfile)
3911 		    ? BACKWARD_FILE
3912 		    : BACKWARD,
3913 	    errornr, eap->forceit);
3914 }
3915 
3916 /*
3917  * ":cfile"/":cgetfile"/":caddfile" commands.
3918  * ":lfile"/":lgetfile"/":laddfile" commands.
3919  */
3920     void
3921 ex_cfile(exarg_T *eap)
3922 {
3923     char_u	*enc = NULL;
3924     win_T	*wp = NULL;
3925     qf_info_T	*qi = &ql_info;
3926 #ifdef FEAT_AUTOCMD
3927     char_u	*au_name = NULL;
3928 #endif
3929 
3930     if (eap->cmdidx == CMD_lfile || eap->cmdidx == CMD_lgetfile
3931 					       || eap->cmdidx == CMD_laddfile)
3932 	wp = curwin;
3933 
3934 #ifdef FEAT_AUTOCMD
3935     switch (eap->cmdidx)
3936     {
3937 	case CMD_cfile:	    au_name = (char_u *)"cfile"; break;
3938 	case CMD_cgetfile:  au_name = (char_u *)"cgetfile"; break;
3939 	case CMD_caddfile:  au_name = (char_u *)"caddfile"; break;
3940 	case CMD_lfile:	    au_name = (char_u *)"lfile"; break;
3941 	case CMD_lgetfile:  au_name = (char_u *)"lgetfile"; break;
3942 	case CMD_laddfile:  au_name = (char_u *)"laddfile"; break;
3943 	default: break;
3944     }
3945     if (au_name != NULL)
3946 	apply_autocmds(EVENT_QUICKFIXCMDPRE, au_name, NULL, FALSE, curbuf);
3947 #endif
3948 #ifdef FEAT_MBYTE
3949     enc = (*curbuf->b_p_menc != NUL) ? curbuf->b_p_menc : p_menc;
3950 #endif
3951 #ifdef FEAT_BROWSE
3952     if (cmdmod.browse)
3953     {
3954 	char_u *browse_file = do_browse(0, (char_u *)_("Error file"), eap->arg,
3955 				   NULL, NULL, BROWSE_FILTER_ALL_FILES, NULL);
3956 	if (browse_file == NULL)
3957 	    return;
3958 	set_string_option_direct((char_u *)"ef", -1, browse_file, OPT_FREE, 0);
3959 	vim_free(browse_file);
3960     }
3961     else
3962 #endif
3963     if (*eap->arg != NUL)
3964 	set_string_option_direct((char_u *)"ef", -1, eap->arg, OPT_FREE, 0);
3965 
3966     /*
3967      * This function is used by the :cfile, :cgetfile and :caddfile
3968      * commands.
3969      * :cfile always creates a new quickfix list and jumps to the
3970      * first error.
3971      * :cgetfile creates a new quickfix list but doesn't jump to the
3972      * first error.
3973      * :caddfile adds to an existing quickfix list. If there is no
3974      * quickfix list then a new list is created.
3975      */
3976     if (qf_init(wp, p_ef, p_efm, (eap->cmdidx != CMD_caddfile
3977 				  && eap->cmdidx != CMD_laddfile),
3978 						       *eap->cmdlinep, enc) > 0
3979 				  && (eap->cmdidx == CMD_cfile
3980 					     || eap->cmdidx == CMD_lfile))
3981     {
3982 #ifdef FEAT_AUTOCMD
3983 	if (au_name != NULL)
3984 	    apply_autocmds(EVENT_QUICKFIXCMDPOST, au_name, NULL, FALSE, curbuf);
3985 #endif
3986 	if (wp != NULL)
3987 	    qi = GET_LOC_LIST(wp);
3988 	qf_jump(qi, 0, 0, eap->forceit);	/* display first error */
3989     }
3990 
3991     else
3992     {
3993 #ifdef FEAT_AUTOCMD
3994 	if (au_name != NULL)
3995 	    apply_autocmds(EVENT_QUICKFIXCMDPOST, au_name, NULL, FALSE, curbuf);
3996 #endif
3997     }
3998 }
3999 
4000 /*
4001  * ":vimgrep {pattern} file(s)"
4002  * ":vimgrepadd {pattern} file(s)"
4003  * ":lvimgrep {pattern} file(s)"
4004  * ":lvimgrepadd {pattern} file(s)"
4005  */
4006     void
4007 ex_vimgrep(exarg_T *eap)
4008 {
4009     regmmatch_T	regmatch;
4010     int		fcount;
4011     char_u	**fnames;
4012     char_u	*fname;
4013     char_u	*title;
4014     char_u	*s;
4015     char_u	*p;
4016     int		fi;
4017     qf_info_T	*qi = &ql_info;
4018 #ifdef FEAT_AUTOCMD
4019     qfline_T	*cur_qf_start;
4020 #endif
4021     long	lnum;
4022     buf_T	*buf;
4023     int		duplicate_name = FALSE;
4024     int		using_dummy;
4025     int		redraw_for_dummy = FALSE;
4026     int		found_match;
4027     buf_T	*first_match_buf = NULL;
4028     time_t	seconds = 0;
4029     int		save_mls;
4030 #if defined(FEAT_AUTOCMD) && defined(FEAT_SYN_HL)
4031     char_u	*save_ei = NULL;
4032 #endif
4033     aco_save_T	aco;
4034     int		flags = 0;
4035     colnr_T	col;
4036     long	tomatch;
4037     char_u	*dirname_start = NULL;
4038     char_u	*dirname_now = NULL;
4039     char_u	*target_dir = NULL;
4040 #ifdef FEAT_AUTOCMD
4041     char_u	*au_name =  NULL;
4042 
4043     switch (eap->cmdidx)
4044     {
4045 	case CMD_vimgrep:     au_name = (char_u *)"vimgrep"; break;
4046 	case CMD_lvimgrep:    au_name = (char_u *)"lvimgrep"; break;
4047 	case CMD_vimgrepadd:  au_name = (char_u *)"vimgrepadd"; break;
4048 	case CMD_lvimgrepadd: au_name = (char_u *)"lvimgrepadd"; break;
4049 	case CMD_grep:	      au_name = (char_u *)"grep"; break;
4050 	case CMD_lgrep:	      au_name = (char_u *)"lgrep"; break;
4051 	case CMD_grepadd:     au_name = (char_u *)"grepadd"; break;
4052 	case CMD_lgrepadd:    au_name = (char_u *)"lgrepadd"; break;
4053 	default: break;
4054     }
4055     if (au_name != NULL && apply_autocmds(EVENT_QUICKFIXCMDPRE, au_name,
4056 					       curbuf->b_fname, TRUE, curbuf))
4057     {
4058 # ifdef FEAT_EVAL
4059 	if (aborting())
4060 	    return;
4061 # endif
4062     }
4063 #endif
4064 
4065     if (eap->cmdidx == CMD_lgrep
4066 	    || eap->cmdidx == CMD_lvimgrep
4067 	    || eap->cmdidx == CMD_lgrepadd
4068 	    || eap->cmdidx == CMD_lvimgrepadd)
4069     {
4070 	qi = ll_get_or_alloc_list(curwin);
4071 	if (qi == NULL)
4072 	    return;
4073     }
4074 
4075     if (eap->addr_count > 0)
4076 	tomatch = eap->line2;
4077     else
4078 	tomatch = MAXLNUM;
4079 
4080     /* Get the search pattern: either white-separated or enclosed in // */
4081     regmatch.regprog = NULL;
4082     title = vim_strsave(*eap->cmdlinep);
4083     p = skip_vimgrep_pat(eap->arg, &s, &flags);
4084     if (p == NULL)
4085     {
4086 	EMSG(_(e_invalpat));
4087 	goto theend;
4088     }
4089 
4090     if (s != NULL && *s == NUL)
4091     {
4092 	/* Pattern is empty, use last search pattern. */
4093 	if (last_search_pat() == NULL)
4094 	{
4095 	    EMSG(_(e_noprevre));
4096 	    goto theend;
4097 	}
4098 	regmatch.regprog = vim_regcomp(last_search_pat(), RE_MAGIC);
4099     }
4100     else
4101 	regmatch.regprog = vim_regcomp(s, RE_MAGIC);
4102 
4103     if (regmatch.regprog == NULL)
4104 	goto theend;
4105     regmatch.rmm_ic = p_ic;
4106     regmatch.rmm_maxcol = 0;
4107 
4108     p = skipwhite(p);
4109     if (*p == NUL)
4110     {
4111 	EMSG(_("E683: File name missing or invalid pattern"));
4112 	goto theend;
4113     }
4114 
4115     if ((eap->cmdidx != CMD_grepadd && eap->cmdidx != CMD_lgrepadd &&
4116 	 eap->cmdidx != CMD_vimgrepadd && eap->cmdidx != CMD_lvimgrepadd)
4117 					|| qi->qf_curlist == qi->qf_listcount)
4118 	/* make place for a new list */
4119 	qf_new_list(qi, title != NULL ? title : *eap->cmdlinep);
4120 
4121     /* parse the list of arguments */
4122     if (get_arglist_exp(p, &fcount, &fnames, TRUE) == FAIL)
4123 	goto theend;
4124     if (fcount == 0)
4125     {
4126 	EMSG(_(e_nomatch));
4127 	goto theend;
4128     }
4129 
4130     dirname_start = alloc_id(MAXPATHL, aid_qf_dirname_start);
4131     dirname_now = alloc_id(MAXPATHL, aid_qf_dirname_now);
4132     if (dirname_start == NULL || dirname_now == NULL)
4133     {
4134 	FreeWild(fcount, fnames);
4135 	goto theend;
4136     }
4137 
4138     /* Remember the current directory, because a BufRead autocommand that does
4139      * ":lcd %:p:h" changes the meaning of short path names. */
4140     mch_dirname(dirname_start, MAXPATHL);
4141 
4142 #ifdef FEAT_AUTOCMD
4143      /* Remember the value of qf_start, so that we can check for autocommands
4144       * changing the current quickfix list. */
4145     cur_qf_start = qi->qf_lists[qi->qf_curlist].qf_start;
4146 #endif
4147 
4148     seconds = (time_t)0;
4149     for (fi = 0; fi < fcount && !got_int && tomatch > 0; ++fi)
4150     {
4151 	fname = shorten_fname1(fnames[fi]);
4152 	if (time(NULL) > seconds)
4153 	{
4154 	    /* Display the file name every second or so, show the user we are
4155 	     * working on it. */
4156 	    seconds = time(NULL);
4157 	    msg_start();
4158 	    p = msg_strtrunc(fname, TRUE);
4159 	    if (p == NULL)
4160 		msg_outtrans(fname);
4161 	    else
4162 	    {
4163 		msg_outtrans(p);
4164 		vim_free(p);
4165 	    }
4166 	    msg_clr_eos();
4167 	    msg_didout = FALSE;	    /* overwrite this message */
4168 	    msg_nowait = TRUE;	    /* don't wait for this message */
4169 	    msg_col = 0;
4170 	    out_flush();
4171 	}
4172 
4173 	buf = buflist_findname_exp(fnames[fi]);
4174 	if (buf == NULL || buf->b_ml.ml_mfp == NULL)
4175 	{
4176 	    /* Remember that a buffer with this name already exists. */
4177 	    duplicate_name = (buf != NULL);
4178 	    using_dummy = TRUE;
4179 	    redraw_for_dummy = TRUE;
4180 
4181 #if defined(FEAT_AUTOCMD) && defined(FEAT_SYN_HL)
4182 	    /* Don't do Filetype autocommands to avoid loading syntax and
4183 	     * indent scripts, a great speed improvement. */
4184 	    save_ei = au_event_disable(",Filetype");
4185 #endif
4186 	    /* Don't use modelines here, it's useless. */
4187 	    save_mls = p_mls;
4188 	    p_mls = 0;
4189 
4190 	    /* Load file into a buffer, so that 'fileencoding' is detected,
4191 	     * autocommands applied, etc. */
4192 	    buf = load_dummy_buffer(fname, dirname_start, dirname_now);
4193 
4194 	    p_mls = save_mls;
4195 #if defined(FEAT_AUTOCMD) && defined(FEAT_SYN_HL)
4196 	    au_event_restore(save_ei);
4197 #endif
4198 	}
4199 	else
4200 	    /* Use existing, loaded buffer. */
4201 	    using_dummy = FALSE;
4202 
4203 #ifdef FEAT_AUTOCMD
4204 	if (cur_qf_start != qi->qf_lists[qi->qf_curlist].qf_start)
4205 	{
4206 	    int idx;
4207 
4208 	    /* Autocommands changed the quickfix list.  Find the one we were
4209 	     * using and restore it. */
4210 	    for (idx = 0; idx < LISTCOUNT; ++idx)
4211 		if (cur_qf_start == qi->qf_lists[idx].qf_start)
4212 		{
4213 		    qi->qf_curlist = idx;
4214 		    break;
4215 		}
4216 	    if (idx == LISTCOUNT)
4217 	    {
4218 		/* List cannot be found, create a new one. */
4219 		qf_new_list(qi, *eap->cmdlinep);
4220 		cur_qf_start = qi->qf_lists[qi->qf_curlist].qf_start;
4221 	    }
4222 	}
4223 #endif
4224 
4225 	if (buf == NULL)
4226 	{
4227 	    if (!got_int)
4228 		smsg((char_u *)_("Cannot open file \"%s\""), fname);
4229 	}
4230 	else
4231 	{
4232 	    /* Try for a match in all lines of the buffer.
4233 	     * For ":1vimgrep" look for first match only. */
4234 	    found_match = FALSE;
4235 	    for (lnum = 1; lnum <= buf->b_ml.ml_line_count && tomatch > 0;
4236 								       ++lnum)
4237 	    {
4238 		col = 0;
4239 		while (vim_regexec_multi(&regmatch, curwin, buf, lnum,
4240 							  col, NULL, NULL) > 0)
4241 		{
4242 		    /* Pass the buffer number so that it gets used even for a
4243 		     * dummy buffer, unless duplicate_name is set, then the
4244 		     * buffer will be wiped out below. */
4245 		    if (qf_add_entry(qi,
4246 				qi->qf_curlist,
4247 				NULL,       /* dir */
4248 				fname,
4249 				duplicate_name ? 0 : buf->b_fnum,
4250 				ml_get_buf(buf,
4251 				     regmatch.startpos[0].lnum + lnum, FALSE),
4252 				regmatch.startpos[0].lnum + lnum,
4253 				regmatch.startpos[0].col + 1,
4254 				FALSE,      /* vis_col */
4255 				NULL,	    /* search pattern */
4256 				0,	    /* nr */
4257 				0,	    /* type */
4258 				TRUE	    /* valid */
4259 				) == FAIL)
4260 		    {
4261 			got_int = TRUE;
4262 			break;
4263 		    }
4264 		    found_match = TRUE;
4265 		    if (--tomatch == 0)
4266 			break;
4267 		    if ((flags & VGR_GLOBAL) == 0
4268 					       || regmatch.endpos[0].lnum > 0)
4269 			break;
4270 		    col = regmatch.endpos[0].col
4271 					    + (col == regmatch.endpos[0].col);
4272 		    if (col > (colnr_T)STRLEN(ml_get_buf(buf, lnum, FALSE)))
4273 			break;
4274 		}
4275 		line_breakcheck();
4276 		if (got_int)
4277 		    break;
4278 	    }
4279 #ifdef FEAT_AUTOCMD
4280 	    cur_qf_start = qi->qf_lists[qi->qf_curlist].qf_start;
4281 #endif
4282 
4283 	    if (using_dummy)
4284 	    {
4285 		if (found_match && first_match_buf == NULL)
4286 		    first_match_buf = buf;
4287 		if (duplicate_name)
4288 		{
4289 		    /* Never keep a dummy buffer if there is another buffer
4290 		     * with the same name. */
4291 		    wipe_dummy_buffer(buf, dirname_start);
4292 		    buf = NULL;
4293 		}
4294 		else if (!cmdmod.hide
4295 			    || buf->b_p_bh[0] == 'u'	/* "unload" */
4296 			    || buf->b_p_bh[0] == 'w'	/* "wipe" */
4297 			    || buf->b_p_bh[0] == 'd')	/* "delete" */
4298 		{
4299 		    /* When no match was found we don't need to remember the
4300 		     * buffer, wipe it out.  If there was a match and it
4301 		     * wasn't the first one or we won't jump there: only
4302 		     * unload the buffer.
4303 		     * Ignore 'hidden' here, because it may lead to having too
4304 		     * many swap files. */
4305 		    if (!found_match)
4306 		    {
4307 			wipe_dummy_buffer(buf, dirname_start);
4308 			buf = NULL;
4309 		    }
4310 		    else if (buf != first_match_buf || (flags & VGR_NOJUMP))
4311 		    {
4312 			unload_dummy_buffer(buf, dirname_start);
4313 			/* Keeping the buffer, remove the dummy flag. */
4314 			buf->b_flags &= ~BF_DUMMY;
4315 			buf = NULL;
4316 		    }
4317 		}
4318 
4319 		if (buf != NULL)
4320 		{
4321 		    /* Keeping the buffer, remove the dummy flag. */
4322 		    buf->b_flags &= ~BF_DUMMY;
4323 
4324 		    /* If the buffer is still loaded we need to use the
4325 		     * directory we jumped to below. */
4326 		    if (buf == first_match_buf
4327 			    && target_dir == NULL
4328 			    && STRCMP(dirname_start, dirname_now) != 0)
4329 			target_dir = vim_strsave(dirname_now);
4330 
4331 		    /* The buffer is still loaded, the Filetype autocommands
4332 		     * need to be done now, in that buffer.  And the modelines
4333 		     * need to be done (again).  But not the window-local
4334 		     * options! */
4335 		    aucmd_prepbuf(&aco, buf);
4336 #if defined(FEAT_AUTOCMD) && defined(FEAT_SYN_HL)
4337 		    apply_autocmds(EVENT_FILETYPE, buf->b_p_ft,
4338 						     buf->b_fname, TRUE, buf);
4339 #endif
4340 		    do_modelines(OPT_NOWIN);
4341 		    aucmd_restbuf(&aco);
4342 		}
4343 	    }
4344 	}
4345     }
4346 
4347     FreeWild(fcount, fnames);
4348 
4349     qi->qf_lists[qi->qf_curlist].qf_nonevalid = FALSE;
4350     qi->qf_lists[qi->qf_curlist].qf_ptr = qi->qf_lists[qi->qf_curlist].qf_start;
4351     qi->qf_lists[qi->qf_curlist].qf_index = 1;
4352 
4353 #ifdef FEAT_WINDOWS
4354     qf_update_buffer(qi, NULL);
4355 #endif
4356 
4357 #ifdef FEAT_AUTOCMD
4358     if (au_name != NULL)
4359 	apply_autocmds(EVENT_QUICKFIXCMDPOST, au_name,
4360 					       curbuf->b_fname, TRUE, curbuf);
4361 #endif
4362 
4363     /* Jump to first match. */
4364     if (qi->qf_lists[qi->qf_curlist].qf_count > 0)
4365     {
4366 	if ((flags & VGR_NOJUMP) == 0)
4367 	{
4368 	    buf = curbuf;
4369 	    qf_jump(qi, 0, 0, eap->forceit);
4370 	    if (buf != curbuf)
4371 		/* If we jumped to another buffer redrawing will already be
4372 		 * taken care of. */
4373 		redraw_for_dummy = FALSE;
4374 
4375 	    /* Jump to the directory used after loading the buffer. */
4376 	    if (curbuf == first_match_buf && target_dir != NULL)
4377 	    {
4378 		exarg_T ea;
4379 
4380 		ea.arg = target_dir;
4381 		ea.cmdidx = CMD_lcd;
4382 		ex_cd(&ea);
4383 	    }
4384 	}
4385     }
4386     else
4387 	EMSG2(_(e_nomatch2), s);
4388 
4389     /* If we loaded a dummy buffer into the current window, the autocommands
4390      * may have messed up things, need to redraw and recompute folds. */
4391     if (redraw_for_dummy)
4392     {
4393 #ifdef FEAT_FOLDING
4394 	foldUpdateAll(curwin);
4395 #else
4396 	redraw_later(NOT_VALID);
4397 #endif
4398     }
4399 
4400 theend:
4401     vim_free(title);
4402     vim_free(dirname_now);
4403     vim_free(dirname_start);
4404     vim_free(target_dir);
4405     vim_regfree(regmatch.regprog);
4406 }
4407 
4408 /*
4409  * Restore current working directory to "dirname_start" if they differ, taking
4410  * into account whether it is set locally or globally.
4411  */
4412     static void
4413 restore_start_dir(char_u *dirname_start)
4414 {
4415     char_u *dirname_now = alloc(MAXPATHL);
4416 
4417     if (NULL != dirname_now)
4418     {
4419 	mch_dirname(dirname_now, MAXPATHL);
4420 	if (STRCMP(dirname_start, dirname_now) != 0)
4421 	{
4422 	    /* If the directory has changed, change it back by building up an
4423 	     * appropriate ex command and executing it. */
4424 	    exarg_T ea;
4425 
4426 	    ea.arg = dirname_start;
4427 	    ea.cmdidx = (curwin->w_localdir == NULL) ? CMD_cd : CMD_lcd;
4428 	    ex_cd(&ea);
4429 	}
4430 	vim_free(dirname_now);
4431     }
4432 }
4433 
4434 /*
4435  * Load file "fname" into a dummy buffer and return the buffer pointer,
4436  * placing the directory resulting from the buffer load into the
4437  * "resulting_dir" pointer. "resulting_dir" must be allocated by the caller
4438  * prior to calling this function. Restores directory to "dirname_start" prior
4439  * to returning, if autocmds or the 'autochdir' option have changed it.
4440  *
4441  * If creating the dummy buffer does not fail, must call unload_dummy_buffer()
4442  * or wipe_dummy_buffer() later!
4443  *
4444  * Returns NULL if it fails.
4445  */
4446     static buf_T *
4447 load_dummy_buffer(
4448     char_u	*fname,
4449     char_u	*dirname_start,  /* in: old directory */
4450     char_u	*resulting_dir)  /* out: new directory */
4451 {
4452     buf_T	*newbuf;
4453     bufref_T	newbufref;
4454     bufref_T	newbuf_to_wipe;
4455     int		failed = TRUE;
4456     aco_save_T	aco;
4457 
4458     /* Allocate a buffer without putting it in the buffer list. */
4459     newbuf = buflist_new(NULL, NULL, (linenr_T)1, BLN_DUMMY);
4460     if (newbuf == NULL)
4461 	return NULL;
4462     set_bufref(&newbufref, newbuf);
4463 
4464     /* Init the options. */
4465     buf_copy_options(newbuf, BCO_ENTER | BCO_NOHELP);
4466 
4467     /* need to open the memfile before putting the buffer in a window */
4468     if (ml_open(newbuf) == OK)
4469     {
4470 	/* set curwin/curbuf to buf and save a few things */
4471 	aucmd_prepbuf(&aco, newbuf);
4472 
4473 	/* Need to set the filename for autocommands. */
4474 	(void)setfname(curbuf, fname, NULL, FALSE);
4475 
4476 	/* Create swap file now to avoid the ATTENTION message. */
4477 	check_need_swap(TRUE);
4478 
4479 	/* Remove the "dummy" flag, otherwise autocommands may not
4480 	 * work. */
4481 	curbuf->b_flags &= ~BF_DUMMY;
4482 
4483 	newbuf_to_wipe.br_buf = NULL;
4484 	if (readfile(fname, NULL,
4485 		    (linenr_T)0, (linenr_T)0, (linenr_T)MAXLNUM,
4486 		    NULL, READ_NEW | READ_DUMMY) == OK
4487 		&& !got_int
4488 		&& !(curbuf->b_flags & BF_NEW))
4489 	{
4490 	    failed = FALSE;
4491 	    if (curbuf != newbuf)
4492 	    {
4493 		/* Bloody autocommands changed the buffer!  Can happen when
4494 		 * using netrw and editing a remote file.  Use the current
4495 		 * buffer instead, delete the dummy one after restoring the
4496 		 * window stuff. */
4497 		set_bufref(&newbuf_to_wipe, newbuf);
4498 		newbuf = curbuf;
4499 	    }
4500 	}
4501 
4502 	/* restore curwin/curbuf and a few other things */
4503 	aucmd_restbuf(&aco);
4504 	if (newbuf_to_wipe.br_buf != NULL && bufref_valid(&newbuf_to_wipe))
4505 	    wipe_buffer(newbuf_to_wipe.br_buf, FALSE);
4506 
4507 	/* Add back the "dummy" flag, otherwise buflist_findname_stat() won't
4508 	 * skip it. */
4509 	newbuf->b_flags |= BF_DUMMY;
4510     }
4511 
4512     /*
4513      * When autocommands/'autochdir' option changed directory: go back.
4514      * Let the caller know what the resulting dir was first, in case it is
4515      * important.
4516      */
4517     mch_dirname(resulting_dir, MAXPATHL);
4518     restore_start_dir(dirname_start);
4519 
4520     if (!bufref_valid(&newbufref))
4521 	return NULL;
4522     if (failed)
4523     {
4524 	wipe_dummy_buffer(newbuf, dirname_start);
4525 	return NULL;
4526     }
4527     return newbuf;
4528 }
4529 
4530 /*
4531  * Wipe out the dummy buffer that load_dummy_buffer() created. Restores
4532  * directory to "dirname_start" prior to returning, if autocmds or the
4533  * 'autochdir' option have changed it.
4534  */
4535     static void
4536 wipe_dummy_buffer(buf_T *buf, char_u *dirname_start)
4537 {
4538     if (curbuf != buf)		/* safety check */
4539     {
4540 #if defined(FEAT_AUTOCMD) && defined(FEAT_EVAL)
4541 	cleanup_T   cs;
4542 
4543 	/* Reset the error/interrupt/exception state here so that aborting()
4544 	 * returns FALSE when wiping out the buffer.  Otherwise it doesn't
4545 	 * work when got_int is set. */
4546 	enter_cleanup(&cs);
4547 #endif
4548 
4549 	wipe_buffer(buf, FALSE);
4550 
4551 #if defined(FEAT_AUTOCMD) && defined(FEAT_EVAL)
4552 	/* Restore the error/interrupt/exception state if not discarded by a
4553 	 * new aborting error, interrupt, or uncaught exception. */
4554 	leave_cleanup(&cs);
4555 #endif
4556 	/* When autocommands/'autochdir' option changed directory: go back. */
4557 	restore_start_dir(dirname_start);
4558     }
4559 }
4560 
4561 /*
4562  * Unload the dummy buffer that load_dummy_buffer() created. Restores
4563  * directory to "dirname_start" prior to returning, if autocmds or the
4564  * 'autochdir' option have changed it.
4565  */
4566     static void
4567 unload_dummy_buffer(buf_T *buf, char_u *dirname_start)
4568 {
4569     if (curbuf != buf)		/* safety check */
4570     {
4571 	close_buffer(NULL, buf, DOBUF_UNLOAD, FALSE);
4572 
4573 	/* When autocommands/'autochdir' option changed directory: go back. */
4574 	restore_start_dir(dirname_start);
4575     }
4576 }
4577 
4578 #if defined(FEAT_EVAL) || defined(PROTO)
4579 /*
4580  * Add each quickfix error to list "list" as a dictionary.
4581  * If qf_idx is -1, use the current list. Otherwise, use the specified list.
4582  */
4583     int
4584 get_errorlist(win_T *wp, int qf_idx, list_T *list)
4585 {
4586     qf_info_T	*qi = &ql_info;
4587     dict_T	*dict;
4588     char_u	buf[2];
4589     qfline_T	*qfp;
4590     int		i;
4591     int		bufnum;
4592 
4593     if (wp != NULL)
4594     {
4595 	qi = GET_LOC_LIST(wp);
4596 	if (qi == NULL)
4597 	    return FAIL;
4598     }
4599 
4600     if (qf_idx == -1)
4601 	qf_idx = qi->qf_curlist;
4602 
4603     if (qf_idx >= qi->qf_listcount
4604 	    || qi->qf_lists[qf_idx].qf_count == 0)
4605 	return FAIL;
4606 
4607     qfp = qi->qf_lists[qf_idx].qf_start;
4608     for (i = 1; !got_int && i <= qi->qf_lists[qf_idx].qf_count; ++i)
4609     {
4610 	/* Handle entries with a non-existing buffer number. */
4611 	bufnum = qfp->qf_fnum;
4612 	if (bufnum != 0 && (buflist_findnr(bufnum) == NULL))
4613 	    bufnum = 0;
4614 
4615 	if ((dict = dict_alloc()) == NULL)
4616 	    return FAIL;
4617 	if (list_append_dict(list, dict) == FAIL)
4618 	    return FAIL;
4619 
4620 	buf[0] = qfp->qf_type;
4621 	buf[1] = NUL;
4622 	if ( dict_add_nr_str(dict, "bufnr", (long)bufnum, NULL) == FAIL
4623 	  || dict_add_nr_str(dict, "lnum",  (long)qfp->qf_lnum, NULL) == FAIL
4624 	  || dict_add_nr_str(dict, "col",   (long)qfp->qf_col, NULL) == FAIL
4625 	  || dict_add_nr_str(dict, "vcol",  (long)qfp->qf_viscol, NULL) == FAIL
4626 	  || dict_add_nr_str(dict, "nr",    (long)qfp->qf_nr, NULL) == FAIL
4627 	  || dict_add_nr_str(dict, "pattern",  0L,
4628 	     qfp->qf_pattern == NULL ? (char_u *)"" : qfp->qf_pattern) == FAIL
4629 	  || dict_add_nr_str(dict, "text",  0L,
4630 		   qfp->qf_text == NULL ? (char_u *)"" : qfp->qf_text) == FAIL
4631 	  || dict_add_nr_str(dict, "type",  0L, buf) == FAIL
4632 	  || dict_add_nr_str(dict, "valid", (long)qfp->qf_valid, NULL) == FAIL)
4633 	    return FAIL;
4634 
4635 	qfp = qfp->qf_next;
4636 	if (qfp == NULL)
4637 	    break;
4638     }
4639     return OK;
4640 }
4641 
4642 /*
4643  * Flags used by getqflist()/getloclist() to determine which fields to return.
4644  */
4645 enum {
4646     QF_GETLIST_NONE	= 0x0,
4647     QF_GETLIST_TITLE	= 0x1,
4648     QF_GETLIST_ITEMS	= 0x2,
4649     QF_GETLIST_NR	= 0x4,
4650     QF_GETLIST_WINID	= 0x8,
4651     QF_GETLIST_CONTEXT	= 0x10,
4652     QF_GETLIST_ALL	= 0xFF
4653 };
4654 
4655 /*
4656  * Return quickfix/location list details (title) as a
4657  * dictionary. 'what' contains the details to return. If 'list_idx' is -1,
4658  * then current list is used. Otherwise the specified list is used.
4659  */
4660     int
4661 get_errorlist_properties(win_T *wp, dict_T *what, dict_T *retdict)
4662 {
4663     qf_info_T	*qi = &ql_info;
4664     int		status = OK;
4665     int		qf_idx;
4666     dictitem_T	*di;
4667     int		flags = QF_GETLIST_NONE;
4668 
4669     if (wp != NULL)
4670     {
4671 	qi = GET_LOC_LIST(wp);
4672 	if (qi == NULL)
4673 	{
4674 	    /* If querying for the size of the location list, return 0 */
4675 	    if (((di = dict_find(what, (char_u *)"nr", -1)) != NULL) &&
4676 		    (di->di_tv.v_type == VAR_STRING) &&
4677 		    (STRCMP(di->di_tv.vval.v_string, "$") == 0))
4678 		    return dict_add_nr_str(retdict, "nr", 0, NULL);
4679 	    return FAIL;
4680 	}
4681     }
4682 
4683     qf_idx = qi->qf_curlist;		/* default is the current list */
4684     if ((di = dict_find(what, (char_u *)"nr", -1)) != NULL)
4685     {
4686 	/* Use the specified quickfix/location list */
4687 	if (di->di_tv.v_type == VAR_NUMBER)
4688 	{
4689 	    /* for zero use the current list */
4690 	    if (di->di_tv.vval.v_number != 0)
4691 	    {
4692 		qf_idx = di->di_tv.vval.v_number - 1;
4693 		if (qf_idx < 0 || qf_idx >= qi->qf_listcount)
4694 		    return FAIL;
4695 	    } else if (qi->qf_listcount == 0)	    /* stack is empty */
4696 		return FAIL;
4697 	    flags |= QF_GETLIST_NR;
4698 	} else if ((di->di_tv.v_type == VAR_STRING) &&
4699 		(STRCMP(di->di_tv.vval.v_string, "$") == 0))
4700 	{
4701 	    {
4702 		/* Get the last quickfix list number */
4703 		if (qi->qf_listcount > 0)
4704 		    qf_idx = qi->qf_listcount - 1;
4705 		else
4706 		    qf_idx = -1;	/* Quickfix stack is empty */
4707 	    }
4708 	    flags |= QF_GETLIST_NR;
4709 	}
4710 	else
4711 	    return FAIL;
4712     }
4713 
4714     if (qf_idx != -1)
4715     {
4716 	if (dict_find(what, (char_u *)"all", -1) != NULL)
4717 	    flags |= QF_GETLIST_ALL;
4718 
4719 	if (dict_find(what, (char_u *)"title", -1) != NULL)
4720 	    flags |= QF_GETLIST_TITLE;
4721 
4722 	if (dict_find(what, (char_u *)"winid", -1) != NULL)
4723 	    flags |= QF_GETLIST_WINID;
4724 
4725 	if (dict_find(what, (char_u *)"context", -1) != NULL)
4726 	    flags |= QF_GETLIST_CONTEXT;
4727     }
4728 
4729     if (flags & QF_GETLIST_TITLE)
4730     {
4731 	char_u	*t;
4732 	t = qi->qf_lists[qf_idx].qf_title;
4733 	if (t == NULL)
4734 	    t = (char_u *)"";
4735 	status = dict_add_nr_str(retdict, "title", 0L, t);
4736     }
4737     if ((status == OK) && (flags & QF_GETLIST_NR))
4738 	status = dict_add_nr_str(retdict, "nr", qf_idx + 1, NULL);
4739     if ((status == OK) && (flags & QF_GETLIST_WINID))
4740     {
4741 	win_T	*win;
4742 	win = qf_find_win(qi);
4743 	if (win != NULL)
4744 	    status = dict_add_nr_str(retdict, "winid", win->w_id, NULL);
4745     }
4746 
4747     if ((status == OK) && (flags & QF_GETLIST_CONTEXT))
4748     {
4749 	if (qi->qf_lists[qf_idx].qf_ctx != NULL)
4750 	{
4751 	    di = dictitem_alloc((char_u *)"context");
4752 	    if (di != NULL)
4753 	    {
4754 		copy_tv(qi->qf_lists[qf_idx].qf_ctx, &di->di_tv);
4755 		if (dict_add(retdict, di) == FAIL)
4756 		    dictitem_free(di);
4757 	    }
4758 	}
4759 	else
4760 	    status = dict_add_nr_str(retdict, "context", 0L, (char_u *)"");
4761     }
4762 
4763     return status;
4764 }
4765 
4766 /*
4767  * Add list of entries to quickfix/location list. Each list entry is
4768  * a dictionary with item information.
4769  */
4770     static int
4771 qf_add_entries(
4772 	qf_info_T	*qi,
4773 	int		qf_idx,
4774 	list_T		*list,
4775 	char_u		*title,
4776 	int		action)
4777 {
4778     listitem_T	*li;
4779     dict_T	*d;
4780     char_u	*filename, *pattern, *text, *type;
4781     int		bufnum;
4782     long	lnum;
4783     int		col, nr;
4784     int		vcol;
4785 #ifdef FEAT_WINDOWS
4786     qfline_T	*old_last = NULL;
4787 #endif
4788     int		valid, status;
4789     int		retval = OK;
4790     int		did_bufnr_emsg = FALSE;
4791 
4792     if (action == ' ' || qf_idx == qi->qf_listcount)
4793     {
4794 	/* make place for a new list */
4795 	qf_new_list(qi, title);
4796 	qf_idx = qi->qf_curlist;
4797     }
4798 #ifdef FEAT_WINDOWS
4799     else if (action == 'a' && qi->qf_lists[qf_idx].qf_count > 0)
4800 	/* Adding to existing list, use last entry. */
4801 	old_last = qi->qf_lists[qf_idx].qf_last;
4802 #endif
4803     else if (action == 'r')
4804     {
4805 	qf_free(qi, qf_idx);
4806 	qf_store_title(qi, qf_idx, title);
4807     }
4808 
4809     for (li = list->lv_first; li != NULL; li = li->li_next)
4810     {
4811 	if (li->li_tv.v_type != VAR_DICT)
4812 	    continue; /* Skip non-dict items */
4813 
4814 	d = li->li_tv.vval.v_dict;
4815 	if (d == NULL)
4816 	    continue;
4817 
4818 	filename = get_dict_string(d, (char_u *)"filename", TRUE);
4819 	bufnum = (int)get_dict_number(d, (char_u *)"bufnr");
4820 	lnum = (int)get_dict_number(d, (char_u *)"lnum");
4821 	col = (int)get_dict_number(d, (char_u *)"col");
4822 	vcol = (int)get_dict_number(d, (char_u *)"vcol");
4823 	nr = (int)get_dict_number(d, (char_u *)"nr");
4824 	type = get_dict_string(d, (char_u *)"type", TRUE);
4825 	pattern = get_dict_string(d, (char_u *)"pattern", TRUE);
4826 	text = get_dict_string(d, (char_u *)"text", TRUE);
4827 	if (text == NULL)
4828 	    text = vim_strsave((char_u *)"");
4829 
4830 	valid = TRUE;
4831 	if ((filename == NULL && bufnum == 0) || (lnum == 0 && pattern == NULL))
4832 	    valid = FALSE;
4833 
4834 	/* Mark entries with non-existing buffer number as not valid. Give the
4835 	 * error message only once. */
4836 	if (bufnum != 0 && (buflist_findnr(bufnum) == NULL))
4837 	{
4838 	    if (!did_bufnr_emsg)
4839 	    {
4840 		did_bufnr_emsg = TRUE;
4841 		EMSGN(_("E92: Buffer %ld not found"), bufnum);
4842 	    }
4843 	    valid = FALSE;
4844 	    bufnum = 0;
4845 	}
4846 
4847 	/* If the 'valid' field is present it overrules the detected value. */
4848 	if ((dict_find(d, (char_u *)"valid", -1)) != NULL)
4849 	    valid = (int)get_dict_number(d, (char_u *)"valid");
4850 
4851 	status =  qf_add_entry(qi,
4852 			       qf_idx,
4853 			       NULL,	    /* dir */
4854 			       filename,
4855 			       bufnum,
4856 			       text,
4857 			       lnum,
4858 			       col,
4859 			       vcol,	    /* vis_col */
4860 			       pattern,	    /* search pattern */
4861 			       nr,
4862 			       type == NULL ? NUL : *type,
4863 			       valid);
4864 
4865 	vim_free(filename);
4866 	vim_free(pattern);
4867 	vim_free(text);
4868 	vim_free(type);
4869 
4870 	if (status == FAIL)
4871 	{
4872 	    retval = FAIL;
4873 	    break;
4874 	}
4875     }
4876 
4877     if (qi->qf_lists[qf_idx].qf_index == 0)
4878 	/* no valid entry */
4879 	qi->qf_lists[qf_idx].qf_nonevalid = TRUE;
4880     else
4881 	qi->qf_lists[qf_idx].qf_nonevalid = FALSE;
4882     if (action != 'a')
4883     {
4884 	qi->qf_lists[qf_idx].qf_ptr =
4885 	    qi->qf_lists[qf_idx].qf_start;
4886 	if (qi->qf_lists[qf_idx].qf_count > 0)
4887 	    qi->qf_lists[qf_idx].qf_index = 1;
4888     }
4889 
4890 #ifdef FEAT_WINDOWS
4891     /* Don't update the cursor in quickfix window when appending entries */
4892     qf_update_buffer(qi, old_last);
4893 #endif
4894 
4895     return retval;
4896 }
4897 
4898     static int
4899 qf_set_properties(qf_info_T *qi, dict_T *what, int action)
4900 {
4901     dictitem_T	*di;
4902     int		retval = FAIL;
4903     int		qf_idx;
4904     int		newlist = FALSE;
4905 
4906     if (action == ' ' || qi->qf_curlist == qi->qf_listcount)
4907 	newlist = TRUE;
4908 
4909     qf_idx = qi->qf_curlist;		/* default is the current list */
4910     if ((di = dict_find(what, (char_u *)"nr", -1)) != NULL)
4911     {
4912 	/* Use the specified quickfix/location list */
4913 	if (di->di_tv.v_type == VAR_NUMBER)
4914 	{
4915 	    /* for zero use the current list */
4916 	    if (di->di_tv.vval.v_number != 0)
4917 		qf_idx = di->di_tv.vval.v_number - 1;
4918 	    if (qf_idx < 0 || qf_idx >= qi->qf_listcount)
4919 		return FAIL;
4920 	} else if (di->di_tv.v_type == VAR_STRING &&
4921 		STRCMP(di->di_tv.vval.v_string, "$") == 0 &&
4922 		qi->qf_listcount > 0)
4923 	    qf_idx = qi->qf_listcount - 1;
4924 	else
4925 	    return FAIL;
4926 	newlist = FALSE;	/* use the specified list */
4927     }
4928 
4929     if (newlist)
4930     {
4931 	qf_new_list(qi, NULL);
4932 	qf_idx = qi->qf_curlist;
4933     }
4934 
4935     if ((di = dict_find(what, (char_u *)"title", -1)) != NULL)
4936     {
4937 	if (di->di_tv.v_type == VAR_STRING)
4938 	{
4939 	    vim_free(qi->qf_lists[qf_idx].qf_title);
4940 	    qi->qf_lists[qf_idx].qf_title =
4941 		get_dict_string(what, (char_u *)"title", TRUE);
4942 	    if (qf_idx == qi->qf_curlist)
4943 		qf_update_win_titlevar(qi);
4944 	    retval = OK;
4945 	}
4946     }
4947 
4948     if ((di = dict_find(what, (char_u *)"context", -1)) != NULL)
4949     {
4950 	typval_T	*ctx;
4951 
4952 	free_tv(qi->qf_lists[qf_idx].qf_ctx);
4953 	ctx =  alloc_tv();
4954 	if (ctx != NULL)
4955 	    copy_tv(&di->di_tv, ctx);
4956 	qi->qf_lists[qf_idx].qf_ctx = ctx;
4957     }
4958 
4959     return retval;
4960 }
4961 
4962 /*
4963  * Find the non-location list window with the specified location list.
4964  */
4965     static win_T *
4966 find_win_with_ll(qf_info_T *qi)
4967 {
4968     win_T	*wp = NULL;
4969 
4970     FOR_ALL_WINDOWS(wp)
4971 	if ((wp->w_llist == qi) && !bt_quickfix(wp->w_buffer))
4972 	    return wp;
4973 
4974     return NULL;
4975 }
4976 
4977 /*
4978  * Free the entire quickfix/location list stack.
4979  * If the quickfix/location list window is open, then clear it.
4980  */
4981     static void
4982 qf_free_stack(win_T *wp, qf_info_T *qi)
4983 {
4984     win_T	*qfwin = qf_find_win(qi);
4985     win_T	*llwin = NULL;
4986     win_T	*orig_wp = wp;
4987 
4988     if (qfwin != NULL)
4989     {
4990 	/* If the quickfix/location list window is open, then clear it */
4991 	if (qi->qf_curlist < qi->qf_listcount)
4992 	    qf_free(qi, qi->qf_curlist);
4993 	qf_update_buffer(qi, NULL);
4994     }
4995 
4996     if (wp != NULL && IS_LL_WINDOW(wp))
4997     {
4998 	/* If in the location list window, then use the non-location list
4999 	 * window with this location list (if present)
5000 	 */
5001 	llwin = find_win_with_ll(qi);
5002 	if (llwin != NULL)
5003 	    wp = llwin;
5004     }
5005 
5006     qf_free_all(wp);
5007     if (wp == NULL)
5008     {
5009 	/* quickfix list */
5010 	qi->qf_curlist = 0;
5011 	qi->qf_listcount = 0;
5012     }
5013     else if (IS_LL_WINDOW(orig_wp))
5014     {
5015 	/* If the location list window is open, then create a new empty
5016 	 * location list */
5017 	qf_info_T *new_ll = ll_new_list();
5018 
5019 	/* first free the list reference in the location list window */
5020 	ll_free_all(&orig_wp->w_llist_ref);
5021 
5022 	orig_wp->w_llist_ref = new_ll;
5023 	if (llwin != NULL)
5024 	{
5025 	    llwin->w_llist = new_ll;
5026 	    new_ll->qf_refcount++;
5027 	}
5028     }
5029 }
5030 
5031 /*
5032  * Populate the quickfix list with the items supplied in the list
5033  * of dictionaries. "title" will be copied to w:quickfix_title.
5034  * "action" is 'a' for add, 'r' for replace.  Otherwise create a new list.
5035  */
5036     int
5037 set_errorlist(
5038 	win_T	*wp,
5039 	list_T	*list,
5040 	int	action,
5041 	char_u	*title,
5042 	dict_T	*what)
5043 {
5044     qf_info_T	*qi = &ql_info;
5045     int		retval = OK;
5046 
5047     if (wp != NULL)
5048     {
5049 	qi = ll_get_or_alloc_list(wp);
5050 	if (qi == NULL)
5051 	    return FAIL;
5052     }
5053 
5054     if (action == 'f')
5055     {
5056 	/* Free the entire quickfix or location list stack */
5057 	qf_free_stack(wp, qi);
5058     }
5059     else if (what != NULL)
5060 	retval = qf_set_properties(qi, what, action);
5061     else
5062 	retval = qf_add_entries(qi, qi->qf_curlist, list, title, action);
5063 
5064     return retval;
5065 }
5066 
5067     static int
5068 mark_quickfix_ctx(qf_info_T *qi, int copyID)
5069 {
5070     int		i;
5071     int		abort = FALSE;
5072     typval_T	*ctx;
5073 
5074     for (i = 0; i < LISTCOUNT && !abort; ++i)
5075     {
5076 	ctx = qi->qf_lists[i].qf_ctx;
5077 	if (ctx != NULL && ctx->v_type != VAR_NUMBER &&
5078 		ctx->v_type != VAR_STRING && ctx->v_type != VAR_FLOAT)
5079 	    abort = set_ref_in_item(ctx, copyID, NULL, NULL);
5080     }
5081 
5082     return abort;
5083 }
5084 
5085 /*
5086  * Mark the context of the quickfix list and the location lists (if present) as
5087  * "in use". So that garabage collection doesn't free the context.
5088  */
5089     int
5090 set_ref_in_quickfix(int copyID)
5091 {
5092     int		abort = FALSE;
5093     tabpage_T	*tp;
5094     win_T	*win;
5095 
5096     abort = mark_quickfix_ctx(&ql_info, copyID);
5097     if (abort)
5098 	return abort;
5099 
5100     FOR_ALL_TAB_WINDOWS(tp, win)
5101     {
5102 	if (win->w_llist != NULL)
5103 	{
5104 	    abort = mark_quickfix_ctx(win->w_llist, copyID);
5105 	    if (abort)
5106 		return abort;
5107 	}
5108     }
5109 
5110     return abort;
5111 }
5112 #endif
5113 
5114 /*
5115  * ":[range]cbuffer [bufnr]" command.
5116  * ":[range]caddbuffer [bufnr]" command.
5117  * ":[range]cgetbuffer [bufnr]" command.
5118  * ":[range]lbuffer [bufnr]" command.
5119  * ":[range]laddbuffer [bufnr]" command.
5120  * ":[range]lgetbuffer [bufnr]" command.
5121  */
5122     void
5123 ex_cbuffer(exarg_T *eap)
5124 {
5125     buf_T	*buf = NULL;
5126     qf_info_T	*qi = &ql_info;
5127 #ifdef FEAT_AUTOCMD
5128     char_u	*au_name = NULL;
5129 #endif
5130 
5131     if (eap->cmdidx == CMD_lbuffer || eap->cmdidx == CMD_lgetbuffer
5132 	    || eap->cmdidx == CMD_laddbuffer)
5133     {
5134 	qi = ll_get_or_alloc_list(curwin);
5135 	if (qi == NULL)
5136 	    return;
5137     }
5138 
5139 #ifdef FEAT_AUTOCMD
5140     switch (eap->cmdidx)
5141     {
5142 	case CMD_cbuffer:	au_name = (char_u *)"cbuffer"; break;
5143 	case CMD_cgetbuffer:	au_name = (char_u *)"cgetbuffer"; break;
5144 	case CMD_caddbuffer:	au_name = (char_u *)"caddbuffer"; break;
5145 	case CMD_lbuffer:	au_name = (char_u *)"lbuffer"; break;
5146 	case CMD_lgetbuffer:	au_name = (char_u *)"lgetbuffer"; break;
5147 	case CMD_laddbuffer:	au_name = (char_u *)"laddbuffer"; break;
5148 	default: break;
5149     }
5150     if (au_name != NULL && apply_autocmds(EVENT_QUICKFIXCMDPRE, au_name,
5151 					       curbuf->b_fname, TRUE, curbuf))
5152     {
5153 # ifdef FEAT_EVAL
5154 	if (aborting())
5155 	    return;
5156 # endif
5157     }
5158 #endif
5159 
5160     if (*eap->arg == NUL)
5161 	buf = curbuf;
5162     else if (*skipwhite(skipdigits(eap->arg)) == NUL)
5163 	buf = buflist_findnr(atoi((char *)eap->arg));
5164     if (buf == NULL)
5165 	EMSG(_(e_invarg));
5166     else if (buf->b_ml.ml_mfp == NULL)
5167 	EMSG(_("E681: Buffer is not loaded"));
5168     else
5169     {
5170 	if (eap->addr_count == 0)
5171 	{
5172 	    eap->line1 = 1;
5173 	    eap->line2 = buf->b_ml.ml_line_count;
5174 	}
5175 	if (eap->line1 < 1 || eap->line1 > buf->b_ml.ml_line_count
5176 		|| eap->line2 < 1 || eap->line2 > buf->b_ml.ml_line_count)
5177 	    EMSG(_(e_invrange));
5178 	else
5179 	{
5180 	    char_u *qf_title = *eap->cmdlinep;
5181 
5182 	    if (buf->b_sfname)
5183 	    {
5184 		vim_snprintf((char *)IObuff, IOSIZE, "%s (%s)",
5185 				     (char *)qf_title, (char *)buf->b_sfname);
5186 		qf_title = IObuff;
5187 	    }
5188 
5189 	    if (qf_init_ext(qi, NULL, buf, NULL, p_efm,
5190 			    (eap->cmdidx != CMD_caddbuffer
5191 			     && eap->cmdidx != CMD_laddbuffer),
5192 						   eap->line1, eap->line2,
5193 						   qf_title, NULL) > 0)
5194 	    {
5195 #ifdef FEAT_AUTOCMD
5196 		if (au_name != NULL)
5197 		    apply_autocmds(EVENT_QUICKFIXCMDPOST, au_name,
5198 			    curbuf->b_fname, TRUE, curbuf);
5199 #endif
5200 		if (eap->cmdidx == CMD_cbuffer || eap->cmdidx == CMD_lbuffer)
5201 		    qf_jump(qi, 0, 0, eap->forceit);  /* display first error */
5202 	    }
5203 	}
5204     }
5205 }
5206 
5207 #if defined(FEAT_EVAL) || defined(PROTO)
5208 /*
5209  * ":cexpr {expr}", ":cgetexpr {expr}", ":caddexpr {expr}" command.
5210  * ":lexpr {expr}", ":lgetexpr {expr}", ":laddexpr {expr}" command.
5211  */
5212     void
5213 ex_cexpr(exarg_T *eap)
5214 {
5215     typval_T	*tv;
5216     qf_info_T	*qi = &ql_info;
5217 #ifdef FEAT_AUTOCMD
5218     char_u	*au_name = NULL;
5219 #endif
5220 
5221     if (eap->cmdidx == CMD_lexpr || eap->cmdidx == CMD_lgetexpr
5222 	    || eap->cmdidx == CMD_laddexpr)
5223     {
5224 	qi = ll_get_or_alloc_list(curwin);
5225 	if (qi == NULL)
5226 	    return;
5227     }
5228 
5229 #ifdef FEAT_AUTOCMD
5230     switch (eap->cmdidx)
5231     {
5232 	case CMD_cexpr:	    au_name = (char_u *)"cexpr"; break;
5233 	case CMD_cgetexpr:  au_name = (char_u *)"cgetexpr"; break;
5234 	case CMD_caddexpr:  au_name = (char_u *)"caddexpr"; break;
5235 	case CMD_lexpr:	    au_name = (char_u *)"lexpr"; break;
5236 	case CMD_lgetexpr:  au_name = (char_u *)"lgetexpr"; break;
5237 	case CMD_laddexpr:  au_name = (char_u *)"laddexpr"; break;
5238 	default: break;
5239     }
5240     if (au_name != NULL && apply_autocmds(EVENT_QUICKFIXCMDPRE, au_name,
5241 					       curbuf->b_fname, TRUE, curbuf))
5242     {
5243 # ifdef FEAT_EVAL
5244 	if (aborting())
5245 	    return;
5246 # endif
5247     }
5248 #endif
5249 
5250     /* Evaluate the expression.  When the result is a string or a list we can
5251      * use it to fill the errorlist. */
5252     tv = eval_expr(eap->arg, NULL);
5253     if (tv != NULL)
5254     {
5255 	if ((tv->v_type == VAR_STRING && tv->vval.v_string != NULL)
5256 		|| (tv->v_type == VAR_LIST && tv->vval.v_list != NULL))
5257 	{
5258 	    if (qf_init_ext(qi, NULL, NULL, tv, p_efm,
5259 			    (eap->cmdidx != CMD_caddexpr
5260 			     && eap->cmdidx != CMD_laddexpr),
5261 				 (linenr_T)0, (linenr_T)0, *eap->cmdlinep,
5262 				 NULL) > 0)
5263 	    {
5264 #ifdef FEAT_AUTOCMD
5265 		if (au_name != NULL)
5266 		    apply_autocmds(EVENT_QUICKFIXCMDPOST, au_name,
5267 			    curbuf->b_fname, TRUE, curbuf);
5268 #endif
5269 		if (eap->cmdidx == CMD_cexpr || eap->cmdidx == CMD_lexpr)
5270 		    qf_jump(qi, 0, 0, eap->forceit);  /* display first error */
5271 	    }
5272 	}
5273 	else
5274 	    EMSG(_("E777: String or List expected"));
5275 	free_tv(tv);
5276     }
5277 }
5278 #endif
5279 
5280 /*
5281  * ":helpgrep {pattern}"
5282  */
5283     void
5284 ex_helpgrep(exarg_T *eap)
5285 {
5286     regmatch_T	regmatch;
5287     char_u	*save_cpo;
5288     char_u	*p;
5289     int		fcount;
5290     char_u	**fnames;
5291     FILE	*fd;
5292     int		fi;
5293     long	lnum;
5294 #ifdef FEAT_MULTI_LANG
5295     char_u	*lang;
5296 #endif
5297     qf_info_T	*qi = &ql_info;
5298     qf_info_T	*save_qi;
5299     int		new_qi = FALSE;
5300     win_T	*wp;
5301 #ifdef FEAT_AUTOCMD
5302     char_u	*au_name =  NULL;
5303 #endif
5304 
5305 #ifdef FEAT_MULTI_LANG
5306     /* Check for a specified language */
5307     lang = check_help_lang(eap->arg);
5308 #endif
5309 
5310 #ifdef FEAT_AUTOCMD
5311     switch (eap->cmdidx)
5312     {
5313 	case CMD_helpgrep:  au_name = (char_u *)"helpgrep"; break;
5314 	case CMD_lhelpgrep: au_name = (char_u *)"lhelpgrep"; break;
5315 	default: break;
5316     }
5317     if (au_name != NULL && apply_autocmds(EVENT_QUICKFIXCMDPRE, au_name,
5318 					       curbuf->b_fname, TRUE, curbuf))
5319     {
5320 # ifdef FEAT_EVAL
5321 	if (aborting())
5322 	    return;
5323 # endif
5324     }
5325 #endif
5326 
5327     /* Make 'cpoptions' empty, the 'l' flag should not be used here. */
5328     save_cpo = p_cpo;
5329     p_cpo = empty_option;
5330 
5331     if (eap->cmdidx == CMD_lhelpgrep)
5332     {
5333 	/* Find an existing help window */
5334 	FOR_ALL_WINDOWS(wp)
5335 	    if (wp->w_buffer != NULL && wp->w_buffer->b_help)
5336 		break;
5337 
5338 	if (wp == NULL)	    /* Help window not found */
5339 	    qi = NULL;
5340 	else
5341 	    qi = wp->w_llist;
5342 
5343 	if (qi == NULL)
5344 	{
5345 	    /* Allocate a new location list for help text matches */
5346 	    if ((qi = ll_new_list()) == NULL)
5347 		return;
5348 	    new_qi = TRUE;
5349 	}
5350     }
5351 
5352     /* Autocommands may change the list. Save it for later comparison */
5353     save_qi = qi;
5354 
5355     regmatch.regprog = vim_regcomp(eap->arg, RE_MAGIC + RE_STRING);
5356     regmatch.rm_ic = FALSE;
5357     if (regmatch.regprog != NULL)
5358     {
5359 #ifdef FEAT_MBYTE
5360 	vimconv_T vc;
5361 
5362 	/* Help files are in utf-8 or latin1, convert lines when 'encoding'
5363 	 * differs. */
5364 	vc.vc_type = CONV_NONE;
5365 	if (!enc_utf8)
5366 	    convert_setup(&vc, (char_u *)"utf-8", p_enc);
5367 #endif
5368 
5369 	/* create a new quickfix list */
5370 	qf_new_list(qi, *eap->cmdlinep);
5371 
5372 	/* Go through all directories in 'runtimepath' */
5373 	p = p_rtp;
5374 	while (*p != NUL && !got_int)
5375 	{
5376 	    copy_option_part(&p, NameBuff, MAXPATHL, ",");
5377 
5378 	    /* Find all "*.txt" and "*.??x" files in the "doc" directory. */
5379 	    add_pathsep(NameBuff);
5380 	    STRCAT(NameBuff, "doc/*.\\(txt\\|??x\\)");
5381 	    if (gen_expand_wildcards(1, &NameBuff, &fcount,
5382 					     &fnames, EW_FILE|EW_SILENT) == OK
5383 		    && fcount > 0)
5384 	    {
5385 		for (fi = 0; fi < fcount && !got_int; ++fi)
5386 		{
5387 #ifdef FEAT_MULTI_LANG
5388 		    /* Skip files for a different language. */
5389 		    if (lang != NULL
5390 			    && STRNICMP(lang, fnames[fi]
5391 					    + STRLEN(fnames[fi]) - 3, 2) != 0
5392 			    && !(STRNICMP(lang, "en", 2) == 0
5393 				&& STRNICMP("txt", fnames[fi]
5394 					   + STRLEN(fnames[fi]) - 3, 3) == 0))
5395 			    continue;
5396 #endif
5397 		    fd = mch_fopen((char *)fnames[fi], "r");
5398 		    if (fd != NULL)
5399 		    {
5400 			lnum = 1;
5401 			while (!vim_fgets(IObuff, IOSIZE, fd) && !got_int)
5402 			{
5403 			    char_u    *line = IObuff;
5404 #ifdef FEAT_MBYTE
5405 			    /* Convert a line if 'encoding' is not utf-8 and
5406 			     * the line contains a non-ASCII character. */
5407 			    if (vc.vc_type != CONV_NONE
5408 						   && has_non_ascii(IObuff))
5409 			    {
5410 				line = string_convert(&vc, IObuff, NULL);
5411 				if (line == NULL)
5412 				    line = IObuff;
5413 			    }
5414 #endif
5415 
5416 			    if (vim_regexec(&regmatch, line, (colnr_T)0))
5417 			    {
5418 				int	l = (int)STRLEN(line);
5419 
5420 				/* remove trailing CR, LF, spaces, etc. */
5421 				while (l > 0 && line[l - 1] <= ' ')
5422 				     line[--l] = NUL;
5423 
5424 				if (qf_add_entry(qi,
5425 					    qi->qf_curlist,
5426 					    NULL,	/* dir */
5427 					    fnames[fi],
5428 					    0,
5429 					    line,
5430 					    lnum,
5431 					    (int)(regmatch.startp[0] - line)
5432 								+ 1, /* col */
5433 					    FALSE,	/* vis_col */
5434 					    NULL,	/* search pattern */
5435 					    0,		/* nr */
5436 					    1,		/* type */
5437 					    TRUE	/* valid */
5438 					    ) == FAIL)
5439 				{
5440 				    got_int = TRUE;
5441 #ifdef FEAT_MBYTE
5442 				    if (line != IObuff)
5443 					vim_free(line);
5444 #endif
5445 				    break;
5446 				}
5447 			    }
5448 #ifdef FEAT_MBYTE
5449 			    if (line != IObuff)
5450 				vim_free(line);
5451 #endif
5452 			    ++lnum;
5453 			    line_breakcheck();
5454 			}
5455 			fclose(fd);
5456 		    }
5457 		}
5458 		FreeWild(fcount, fnames);
5459 	    }
5460 	}
5461 
5462 	vim_regfree(regmatch.regprog);
5463 #ifdef FEAT_MBYTE
5464 	if (vc.vc_type != CONV_NONE)
5465 	    convert_setup(&vc, NULL, NULL);
5466 #endif
5467 
5468 	qi->qf_lists[qi->qf_curlist].qf_nonevalid = FALSE;
5469 	qi->qf_lists[qi->qf_curlist].qf_ptr =
5470 	    qi->qf_lists[qi->qf_curlist].qf_start;
5471 	qi->qf_lists[qi->qf_curlist].qf_index = 1;
5472     }
5473 
5474     if (p_cpo == empty_option)
5475 	p_cpo = save_cpo;
5476     else
5477 	/* Darn, some plugin changed the value. */
5478 	free_string_option(save_cpo);
5479 
5480 #ifdef FEAT_WINDOWS
5481     qf_update_buffer(qi, NULL);
5482 #endif
5483 
5484 #ifdef FEAT_AUTOCMD
5485     if (au_name != NULL)
5486     {
5487 	apply_autocmds(EVENT_QUICKFIXCMDPOST, au_name,
5488 					       curbuf->b_fname, TRUE, curbuf);
5489 	if (!new_qi && qi != save_qi && qf_find_buf(qi) == NULL)
5490 	    /* autocommands made "qi" invalid */
5491 	    return;
5492     }
5493 #endif
5494 
5495     /* Jump to first match. */
5496     if (qi->qf_lists[qi->qf_curlist].qf_count > 0)
5497 	qf_jump(qi, 0, 0, FALSE);
5498     else
5499 	EMSG2(_(e_nomatch2), eap->arg);
5500 
5501     if (eap->cmdidx == CMD_lhelpgrep)
5502     {
5503 	/* If the help window is not opened or if it already points to the
5504 	 * correct location list, then free the new location list. */
5505 	if (!curwin->w_buffer->b_help || curwin->w_llist == qi)
5506 	{
5507 	    if (new_qi)
5508 		ll_free_all(&qi);
5509 	}
5510 	else if (curwin->w_llist == NULL)
5511 	    curwin->w_llist = qi;
5512     }
5513 }
5514 
5515 #endif /* FEAT_QUICKFIX */
5516