xref: /vim-8.2.3635/src/quickfix.c (revision 61d35bd0)
1 /* vi:set ts=8 sts=4 sw=4:
2  *
3  * VIM - Vi IMproved	by Bram Moolenaar
4  *
5  * Do ":help uganda"  in Vim to read copying and usage conditions.
6  * Do ":help credits" in Vim to see a list of people who contributed.
7  * See README.txt for an overview of the Vim source code.
8  */
9 
10 /*
11  * quickfix.c: functions for quickfix mode, using a file with error messages
12  */
13 
14 #include "vim.h"
15 
16 #if defined(FEAT_QUICKFIX) || defined(PROTO)
17 
18 struct dir_stack_T
19 {
20     struct dir_stack_T	*next;
21     char_u		*dirname;
22 };
23 
24 static struct dir_stack_T   *dir_stack = NULL;
25 
26 /*
27  * For each error the next struct is allocated and linked in a list.
28  */
29 typedef struct qfline_S qfline_T;
30 struct qfline_S
31 {
32     qfline_T	*qf_next;	/* pointer to next error in the list */
33     qfline_T	*qf_prev;	/* pointer to previous error in the list */
34     linenr_T	qf_lnum;	/* line number where the error occurred */
35     int		qf_fnum;	/* file number for the line */
36     int		qf_col;		/* column where the error occurred */
37     int		qf_nr;		/* error number */
38     char_u	*qf_pattern;	/* search pattern for the error */
39     char_u	*qf_text;	/* description of the error */
40     char_u	qf_viscol;	/* set to TRUE if qf_col is screen column */
41     char_u	qf_cleared;	/* set to TRUE if line has been deleted */
42     char_u	qf_type;	/* type of the error (mostly 'E'); 1 for
43 				   :helpgrep */
44     char_u	qf_valid;	/* valid error message detected */
45 };
46 
47 /*
48  * There is a stack of error lists.
49  */
50 #define LISTCOUNT   10
51 
52 typedef struct qf_list_S
53 {
54     qfline_T	*qf_start;	/* pointer to the first error */
55     qfline_T	*qf_ptr;	/* pointer to the current error */
56     int		qf_count;	/* number of errors (0 means no error list) */
57     int		qf_index;	/* current index in the error list */
58     int		qf_nonevalid;	/* TRUE if not a single valid entry found */
59     char_u	*qf_title;	/* title derived from the command that created
60 				 * the error list */
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 
77 static qf_info_T ql_info;	/* global quickfix list */
78 
79 #define FMT_PATTERNS 10		/* maximum number of % recognized */
80 
81 /*
82  * Structure used to hold the info of one part of 'errorformat'
83  */
84 typedef struct efm_S efm_T;
85 struct efm_S
86 {
87     regprog_T	    *prog;	/* pre-formatted part of 'errorformat' */
88     efm_T	    *next;	/* pointer to next (NULL if last) */
89     char_u	    addr[FMT_PATTERNS]; /* indices of used % patterns */
90     char_u	    prefix;	/* prefix of this format line: */
91 				/*   'D' enter directory */
92 				/*   'X' leave directory */
93 				/*   'A' start of multi-line message */
94 				/*   'E' error message */
95 				/*   'W' warning message */
96 				/*   'I' informational message */
97 				/*   'C' continuation line */
98 				/*   'Z' end of multi-line message */
99 				/*   'G' general, unspecific message */
100 				/*   'P' push file (partial) message */
101 				/*   'Q' pop/quit file (partial) message */
102 				/*   'O' overread (partial) message */
103     char_u	    flags;	/* additional flags given in prefix */
104 				/*   '-' do not include this line */
105 				/*   '+' include whole line in message */
106     int		    conthere;	/* %> used */
107 };
108 
109 static int	qf_init_ext __ARGS((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));
110 static void	qf_new_list __ARGS((qf_info_T *qi, char_u *qf_title));
111 static void	ll_free_all __ARGS((qf_info_T **pqi));
112 static int	qf_add_entry __ARGS((qf_info_T *qi, qfline_T **prevp, 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));
113 static qf_info_T *ll_new_list __ARGS((void));
114 static void	qf_msg __ARGS((qf_info_T *qi));
115 static void	qf_free __ARGS((qf_info_T *qi, int idx));
116 static char_u	*qf_types __ARGS((int, int));
117 static int	qf_get_fnum __ARGS((char_u *, char_u *));
118 static char_u	*qf_push_dir __ARGS((char_u *, struct dir_stack_T **));
119 static char_u	*qf_pop_dir __ARGS((struct dir_stack_T **));
120 static char_u	*qf_guess_filepath __ARGS((char_u *));
121 static void	qf_fmt_text __ARGS((char_u *text, char_u *buf, int bufsize));
122 static void	qf_clean_dir_stack __ARGS((struct dir_stack_T **));
123 #ifdef FEAT_WINDOWS
124 static int	qf_win_pos_update __ARGS((qf_info_T *qi, int old_qf_index));
125 static int	is_qf_win __ARGS((win_T *win, qf_info_T *qi));
126 static win_T	*qf_find_win __ARGS((qf_info_T *qi));
127 static buf_T	*qf_find_buf __ARGS((qf_info_T *qi));
128 static void	qf_update_buffer __ARGS((qf_info_T *qi));
129 static void	qf_set_title __ARGS((qf_info_T *qi));
130 static void	qf_fill_buffer __ARGS((qf_info_T *qi));
131 #endif
132 static char_u	*get_mef_name __ARGS((void));
133 static buf_T	*load_dummy_buffer __ARGS((char_u *fname));
134 static void	wipe_dummy_buffer __ARGS((buf_T *buf));
135 static void	unload_dummy_buffer __ARGS((buf_T *buf));
136 static qf_info_T *ll_get_or_alloc_list __ARGS((win_T *));
137 
138 /* Quickfix window check helper macro */
139 #define IS_QF_WINDOW(wp) (bt_quickfix(wp->w_buffer) && wp->w_llist_ref == NULL)
140 /* Location list window check helper macro */
141 #define IS_LL_WINDOW(wp) (bt_quickfix(wp->w_buffer) && wp->w_llist_ref != NULL)
142 /*
143  * Return location list for window 'wp'
144  * For location list window, return the referenced location list
145  */
146 #define GET_LOC_LIST(wp) (IS_LL_WINDOW(wp) ? wp->w_llist_ref : wp->w_llist)
147 
148 /*
149  * Read the errorfile "efile" into memory, line by line, building the error
150  * list. Set the error list's title to qf_title.
151  * Return -1 for error, number of errors for success.
152  */
153     int
154 qf_init(wp, efile, errorformat, newlist, qf_title)
155     win_T	    *wp;
156     char_u	    *efile;
157     char_u	    *errorformat;
158     int		    newlist;		/* TRUE: start a new error list */
159     char_u	    *qf_title;
160 {
161     qf_info_T	    *qi = &ql_info;
162 
163     if (efile == NULL)
164 	return FAIL;
165 
166     if (wp != NULL)
167     {
168 	qi = ll_get_or_alloc_list(wp);
169 	if (qi == NULL)
170 	    return FAIL;
171     }
172 
173     return qf_init_ext(qi, efile, curbuf, NULL, errorformat, newlist,
174 						    (linenr_T)0, (linenr_T)0,
175 						    qf_title);
176 }
177 
178 /*
179  * Read the errorfile "efile" into memory, line by line, building the error
180  * list.
181  * Alternative: when "efile" is null read errors from buffer "buf".
182  * Always use 'errorformat' from "buf" if there is a local value.
183  * Then "lnumfirst" and "lnumlast" specify the range of lines to use.
184  * Set the title of the list to "qf_title".
185  * Return -1 for error, number of errors for success.
186  */
187     static int
188 qf_init_ext(qi, efile, buf, tv, errorformat, newlist, lnumfirst, lnumlast,
189 								     qf_title)
190     qf_info_T	    *qi;
191     char_u	    *efile;
192     buf_T	    *buf;
193     typval_T	    *tv;
194     char_u	    *errorformat;
195     int		    newlist;		/* TRUE: start a new error list */
196     linenr_T	    lnumfirst;		/* first line number to use */
197     linenr_T	    lnumlast;		/* last line number to use */
198     char_u	    *qf_title;
199 {
200     char_u	    *namebuf;
201     char_u	    *errmsg;
202     char_u	    *pattern;
203     char_u	    *fmtstr = NULL;
204     int		    col = 0;
205     char_u	    use_viscol = FALSE;
206     int		    type = 0;
207     int		    valid;
208     linenr_T	    buflnum = lnumfirst;
209     long	    lnum = 0L;
210     int		    enr = 0;
211     FILE	    *fd = NULL;
212     qfline_T	    *qfprev = NULL;	/* init to make SASC shut up */
213     char_u	    *efmp;
214     efm_T	    *fmt_first = NULL;
215     efm_T	    *fmt_last = NULL;
216     efm_T	    *fmt_ptr;
217     efm_T	    *fmt_start = NULL;
218     char_u	    *efm;
219     char_u	    *ptr;
220     char_u	    *srcptr;
221     int		    len;
222     int		    i;
223     int		    round;
224     int		    idx = 0;
225     int		    multiline = FALSE;
226     int		    multiignore = FALSE;
227     int		    multiscan = FALSE;
228     int		    retval = -1;	/* default: return error flag */
229     char_u	    *directory = NULL;
230     char_u	    *currfile = NULL;
231     char_u	    *tail = NULL;
232     char_u	    *p_str = NULL;
233     listitem_T	    *p_li = NULL;
234     struct dir_stack_T  *file_stack = NULL;
235     regmatch_T	    regmatch;
236     static struct fmtpattern
237     {
238 	char_u	convchar;
239 	char	*pattern;
240     }		    fmt_pat[FMT_PATTERNS] =
241 		    {
242 			{'f', ".\\+"},	    /* only used when at end */
243 			{'n', "\\d\\+"},
244 			{'l', "\\d\\+"},
245 			{'c', "\\d\\+"},
246 			{'t', "."},
247 			{'m', ".\\+"},
248 			{'r', ".*"},
249 			{'p', "[- .]*"},
250 			{'v', "\\d\\+"},
251 			{'s', ".\\+"}
252 		    };
253 
254     namebuf = alloc(CMDBUFFSIZE + 1);
255     errmsg = alloc(CMDBUFFSIZE + 1);
256     pattern = alloc(CMDBUFFSIZE + 1);
257     if (namebuf == NULL || errmsg == NULL || pattern == NULL)
258 	goto qf_init_end;
259 
260     if (efile != NULL && (fd = mch_fopen((char *)efile, "r")) == NULL)
261     {
262 	EMSG2(_(e_openerrf), efile);
263 	goto qf_init_end;
264     }
265 
266     if (newlist || qi->qf_curlist == qi->qf_listcount)
267 	/* make place for a new list */
268 	qf_new_list(qi, qf_title);
269     else if (qi->qf_lists[qi->qf_curlist].qf_count > 0)
270 	/* Adding to existing list, find last entry. */
271 	for (qfprev = qi->qf_lists[qi->qf_curlist].qf_start;
272 			  qfprev->qf_next != qfprev; qfprev = qfprev->qf_next)
273 	    ;
274 
275 /*
276  * Each part of the format string is copied and modified from errorformat to
277  * regex prog.  Only a few % characters are allowed.
278  */
279     /* Use the local value of 'errorformat' if it's set. */
280     if (errorformat == p_efm && tv == NULL && *buf->b_p_efm != NUL)
281 	efm = buf->b_p_efm;
282     else
283 	efm = errorformat;
284     /*
285      * Get some space to modify the format string into.
286      */
287     i = (FMT_PATTERNS * 3) + ((int)STRLEN(efm) << 2);
288     for (round = FMT_PATTERNS; round > 0; )
289 	i += (int)STRLEN(fmt_pat[--round].pattern);
290 #ifdef COLON_IN_FILENAME
291     i += 12; /* "%f" can become twelve chars longer */
292 #else
293     i += 2; /* "%f" can become two chars longer */
294 #endif
295     if ((fmtstr = alloc(i)) == NULL)
296 	goto error2;
297 
298     while (efm[0] != NUL)
299     {
300 	/*
301 	 * Allocate a new eformat structure and put it at the end of the list
302 	 */
303 	fmt_ptr = (efm_T *)alloc_clear((unsigned)sizeof(efm_T));
304 	if (fmt_ptr == NULL)
305 	    goto error2;
306 	if (fmt_first == NULL)	    /* first one */
307 	    fmt_first = fmt_ptr;
308 	else
309 	    fmt_last->next = fmt_ptr;
310 	fmt_last = fmt_ptr;
311 
312 	/*
313 	 * Isolate one part in the 'errorformat' option
314 	 */
315 	for (len = 0; efm[len] != NUL && efm[len] != ','; ++len)
316 	    if (efm[len] == '\\' && efm[len + 1] != NUL)
317 		++len;
318 
319 	/*
320 	 * Build regexp pattern from current 'errorformat' option
321 	 */
322 	ptr = fmtstr;
323 	*ptr++ = '^';
324 	round = 0;
325 	for (efmp = efm; efmp < efm + len; ++efmp)
326 	{
327 	    if (*efmp == '%')
328 	    {
329 		++efmp;
330 		for (idx = 0; idx < FMT_PATTERNS; ++idx)
331 		    if (fmt_pat[idx].convchar == *efmp)
332 			break;
333 		if (idx < FMT_PATTERNS)
334 		{
335 		    if (fmt_ptr->addr[idx])
336 		    {
337 			sprintf((char *)errmsg,
338 				_("E372: Too many %%%c in format string"), *efmp);
339 			EMSG(errmsg);
340 			goto error2;
341 		    }
342 		    if ((idx
343 				&& idx < 6
344 				&& vim_strchr((char_u *)"DXOPQ",
345 						     fmt_ptr->prefix) != NULL)
346 			    || (idx == 6
347 				&& vim_strchr((char_u *)"OPQ",
348 						    fmt_ptr->prefix) == NULL))
349 		    {
350 			sprintf((char *)errmsg,
351 				_("E373: Unexpected %%%c in format string"), *efmp);
352 			EMSG(errmsg);
353 			goto error2;
354 		    }
355 		    fmt_ptr->addr[idx] = (char_u)++round;
356 		    *ptr++ = '\\';
357 		    *ptr++ = '(';
358 #ifdef BACKSLASH_IN_FILENAME
359 		    if (*efmp == 'f')
360 		    {
361 			/* Also match "c:" in the file name, even when
362 			 * checking for a colon next: "%f:".
363 			 * "\%(\a:\)\=" */
364 			STRCPY(ptr, "\\%(\\a:\\)\\=");
365 			ptr += 10;
366 		    }
367 #endif
368 		    if (*efmp == 'f' && efmp[1] != NUL)
369 		    {
370 			if (efmp[1] != '\\' && efmp[1] != '%')
371 			{
372 			    /* A file name may contain spaces, but this isn't
373 			     * in "\f".  For "%f:%l:%m" there may be a ":" in
374 			     * the file name.  Use ".\{-1,}x" instead (x is
375 			     * the next character), the requirement that :999:
376 			     * follows should work. */
377 			    STRCPY(ptr, ".\\{-1,}");
378 			    ptr += 7;
379 			}
380 			else
381 			{
382 			    /* File name followed by '\\' or '%': include as
383 			     * many file name chars as possible. */
384 			    STRCPY(ptr, "\\f\\+");
385 			    ptr += 4;
386 			}
387 		    }
388 		    else
389 		    {
390 			srcptr = (char_u *)fmt_pat[idx].pattern;
391 			while ((*ptr = *srcptr++) != NUL)
392 			    ++ptr;
393 		    }
394 		    *ptr++ = '\\';
395 		    *ptr++ = ')';
396 		}
397 		else if (*efmp == '*')
398 		{
399 		    if (*++efmp == '[' || *efmp == '\\')
400 		    {
401 			if ((*ptr++ = *efmp) == '[')	/* %*[^a-z0-9] etc. */
402 			{
403 			    if (efmp[1] == '^')
404 				*ptr++ = *++efmp;
405 			    if (efmp < efm + len)
406 			    {
407 				*ptr++ = *++efmp;	    /* could be ']' */
408 				while (efmp < efm + len
409 					&& (*ptr++ = *++efmp) != ']')
410 				    /* skip */;
411 				if (efmp == efm + len)
412 				{
413 				    EMSG(_("E374: Missing ] in format string"));
414 				    goto error2;
415 				}
416 			    }
417 			}
418 			else if (efmp < efm + len)	/* %*\D, %*\s etc. */
419 			    *ptr++ = *++efmp;
420 			*ptr++ = '\\';
421 			*ptr++ = '+';
422 		    }
423 		    else
424 		    {
425 			/* TODO: scanf()-like: %*ud, %*3c, %*f, ... ? */
426 			sprintf((char *)errmsg,
427 				_("E375: Unsupported %%%c in format string"), *efmp);
428 			EMSG(errmsg);
429 			goto error2;
430 		    }
431 		}
432 		else if (vim_strchr((char_u *)"%\\.^$~[", *efmp) != NULL)
433 		    *ptr++ = *efmp;		/* regexp magic characters */
434 		else if (*efmp == '#')
435 		    *ptr++ = '*';
436 		else if (*efmp == '>')
437 		    fmt_ptr->conthere = TRUE;
438 		else if (efmp == efm + 1)		/* analyse prefix */
439 		{
440 		    if (vim_strchr((char_u *)"+-", *efmp) != NULL)
441 			fmt_ptr->flags = *efmp++;
442 		    if (vim_strchr((char_u *)"DXAEWICZGOPQ", *efmp) != NULL)
443 			fmt_ptr->prefix = *efmp;
444 		    else
445 		    {
446 			sprintf((char *)errmsg,
447 				_("E376: Invalid %%%c in format string prefix"), *efmp);
448 			EMSG(errmsg);
449 			goto error2;
450 		    }
451 		}
452 		else
453 		{
454 		    sprintf((char *)errmsg,
455 			    _("E377: Invalid %%%c in format string"), *efmp);
456 		    EMSG(errmsg);
457 		    goto error2;
458 		}
459 	    }
460 	    else			/* copy normal character */
461 	    {
462 		if (*efmp == '\\' && efmp + 1 < efm + len)
463 		    ++efmp;
464 		else if (vim_strchr((char_u *)".*^$~[", *efmp) != NULL)
465 		    *ptr++ = '\\';	/* escape regexp atoms */
466 		if (*efmp)
467 		    *ptr++ = *efmp;
468 	    }
469 	}
470 	*ptr++ = '$';
471 	*ptr = NUL;
472 	if ((fmt_ptr->prog = vim_regcomp(fmtstr, RE_MAGIC + RE_STRING)) == NULL)
473 	    goto error2;
474 	/*
475 	 * Advance to next part
476 	 */
477 	efm = skip_to_option_part(efm + len);	/* skip comma and spaces */
478     }
479     if (fmt_first == NULL)	/* nothing found */
480     {
481 	EMSG(_("E378: 'errorformat' contains no pattern"));
482 	goto error2;
483     }
484 
485     /*
486      * got_int is reset here, because it was probably set when killing the
487      * ":make" command, but we still want to read the errorfile then.
488      */
489     got_int = FALSE;
490 
491     /* Always ignore case when looking for a matching error. */
492     regmatch.rm_ic = TRUE;
493 
494     if (tv != NULL)
495     {
496 	if (tv->v_type == VAR_STRING)
497 	    p_str = tv->vval.v_string;
498 	else if (tv->v_type == VAR_LIST)
499 	    p_li = tv->vval.v_list->lv_first;
500     }
501 
502     /*
503      * Read the lines in the error file one by one.
504      * Try to recognize one of the error formats in each line.
505      */
506     while (!got_int)
507     {
508 	/* Get the next line. */
509 	if (fd == NULL)
510 	{
511 	    if (tv != NULL)
512 	    {
513 		if (tv->v_type == VAR_STRING)
514 		{
515 		    /* Get the next line from the supplied string */
516 		    char_u *p;
517 
518 		    if (!*p_str) /* Reached the end of the string */
519 			break;
520 
521 		    p = vim_strchr(p_str, '\n');
522 		    if (p)
523 			len = (int)(p - p_str + 1);
524 		    else
525 			len = (int)STRLEN(p_str);
526 
527 		    if (len > CMDBUFFSIZE - 2)
528 			vim_strncpy(IObuff, p_str, CMDBUFFSIZE - 2);
529 		    else
530 			vim_strncpy(IObuff, p_str, len);
531 
532 		    p_str += len;
533 		}
534 		else if (tv->v_type == VAR_LIST)
535 		{
536 		    /* Get the next line from the supplied list */
537 		    while (p_li && p_li->li_tv.v_type != VAR_STRING)
538 			p_li = p_li->li_next;	/* Skip non-string items */
539 
540 		    if (!p_li)			/* End of the list */
541 			break;
542 
543 		    len = (int)STRLEN(p_li->li_tv.vval.v_string);
544 		    if (len > CMDBUFFSIZE - 2)
545 			len = CMDBUFFSIZE - 2;
546 
547 		    vim_strncpy(IObuff, p_li->li_tv.vval.v_string, len);
548 
549 		    p_li = p_li->li_next;	/* next item */
550 		}
551 	    }
552 	    else
553 	    {
554 		/* Get the next line from the supplied buffer */
555 		if (buflnum > lnumlast)
556 		    break;
557 		vim_strncpy(IObuff, ml_get_buf(buf, buflnum++, FALSE),
558 			    CMDBUFFSIZE - 2);
559 	    }
560 	}
561 	else if (fgets((char *)IObuff, CMDBUFFSIZE - 2, fd) == NULL)
562 	    break;
563 
564 	IObuff[CMDBUFFSIZE - 2] = NUL;  /* for very long lines */
565 #ifdef FEAT_MBYTE
566 	remove_bom(IObuff);
567 #endif
568 
569 	if ((efmp = vim_strrchr(IObuff, '\n')) != NULL)
570 	    *efmp = NUL;
571 #ifdef USE_CRNL
572 	if ((efmp = vim_strrchr(IObuff, '\r')) != NULL)
573 	    *efmp = NUL;
574 #endif
575 
576 	/* If there was no %> item start at the first pattern */
577 	if (fmt_start == NULL)
578 	    fmt_ptr = fmt_first;
579 	else
580 	{
581 	    fmt_ptr = fmt_start;
582 	    fmt_start = NULL;
583 	}
584 
585 	/*
586 	 * Try to match each part of 'errorformat' until we find a complete
587 	 * match or no match.
588 	 */
589 	valid = TRUE;
590 restofline:
591 	for ( ; fmt_ptr != NULL; fmt_ptr = fmt_ptr->next)
592 	{
593 	    idx = fmt_ptr->prefix;
594 	    if (multiscan && vim_strchr((char_u *)"OPQ", idx) == NULL)
595 		continue;
596 	    namebuf[0] = NUL;
597 	    pattern[0] = NUL;
598 	    if (!multiscan)
599 		errmsg[0] = NUL;
600 	    lnum = 0;
601 	    col = 0;
602 	    use_viscol = FALSE;
603 	    enr = -1;
604 	    type = 0;
605 	    tail = NULL;
606 
607 	    regmatch.regprog = fmt_ptr->prog;
608 	    if (vim_regexec(&regmatch, IObuff, (colnr_T)0))
609 	    {
610 		if ((idx == 'C' || idx == 'Z') && !multiline)
611 		    continue;
612 		if (vim_strchr((char_u *)"EWI", idx) != NULL)
613 		    type = idx;
614 		else
615 		    type = 0;
616 		/*
617 		 * Extract error message data from matched line.
618 		 * We check for an actual submatch, because "\[" and "\]" in
619 		 * the 'errorformat' may cause the wrong submatch to be used.
620 		 */
621 		if ((i = (int)fmt_ptr->addr[0]) > 0)		/* %f */
622 		{
623 		    int c;
624 
625 		    if (regmatch.startp[i] == NULL || regmatch.endp[i] == NULL)
626 			continue;
627 
628 		    /* Expand ~/file and $HOME/file to full path. */
629 		    c = *regmatch.endp[i];
630 		    *regmatch.endp[i] = NUL;
631 		    expand_env(regmatch.startp[i], namebuf, CMDBUFFSIZE);
632 		    *regmatch.endp[i] = c;
633 
634 		    if (vim_strchr((char_u *)"OPQ", idx) != NULL
635 						&& mch_getperm(namebuf) == -1)
636 			continue;
637 		}
638 		if ((i = (int)fmt_ptr->addr[1]) > 0)		/* %n */
639 		{
640 		    if (regmatch.startp[i] == NULL)
641 			continue;
642 		    enr = (int)atol((char *)regmatch.startp[i]);
643 		}
644 		if ((i = (int)fmt_ptr->addr[2]) > 0)		/* %l */
645 		{
646 		    if (regmatch.startp[i] == NULL)
647 			continue;
648 		    lnum = atol((char *)regmatch.startp[i]);
649 		}
650 		if ((i = (int)fmt_ptr->addr[3]) > 0)		/* %c */
651 		{
652 		    if (regmatch.startp[i] == NULL)
653 			continue;
654 		    col = (int)atol((char *)regmatch.startp[i]);
655 		}
656 		if ((i = (int)fmt_ptr->addr[4]) > 0)		/* %t */
657 		{
658 		    if (regmatch.startp[i] == NULL)
659 			continue;
660 		    type = *regmatch.startp[i];
661 		}
662 		if (fmt_ptr->flags == '+' && !multiscan)	/* %+ */
663 		    STRCPY(errmsg, IObuff);
664 		else if ((i = (int)fmt_ptr->addr[5]) > 0)	/* %m */
665 		{
666 		    if (regmatch.startp[i] == NULL || regmatch.endp[i] == NULL)
667 			continue;
668 		    len = (int)(regmatch.endp[i] - regmatch.startp[i]);
669 		    vim_strncpy(errmsg, regmatch.startp[i], len);
670 		}
671 		if ((i = (int)fmt_ptr->addr[6]) > 0)		/* %r */
672 		{
673 		    if (regmatch.startp[i] == NULL)
674 			continue;
675 		    tail = regmatch.startp[i];
676 		}
677 		if ((i = (int)fmt_ptr->addr[7]) > 0)		/* %p */
678 		{
679 		    if (regmatch.startp[i] == NULL || regmatch.endp[i] == NULL)
680 			continue;
681 		    col = (int)(regmatch.endp[i] - regmatch.startp[i] + 1);
682 		    if (*((char_u *)regmatch.startp[i]) != TAB)
683 			use_viscol = TRUE;
684 		}
685 		if ((i = (int)fmt_ptr->addr[8]) > 0)		/* %v */
686 		{
687 		    if (regmatch.startp[i] == NULL)
688 			continue;
689 		    col = (int)atol((char *)regmatch.startp[i]);
690 		    use_viscol = TRUE;
691 		}
692 		if ((i = (int)fmt_ptr->addr[9]) > 0)		/* %s */
693 		{
694 		    if (regmatch.startp[i] == NULL || regmatch.endp[i] == NULL)
695 			continue;
696 		    len = (int)(regmatch.endp[i] - regmatch.startp[i]);
697 		    if (len > CMDBUFFSIZE - 5)
698 			len = CMDBUFFSIZE - 5;
699 		    STRCPY(pattern, "^\\V");
700 		    STRNCAT(pattern, regmatch.startp[i], len);
701 		    pattern[len + 3] = '\\';
702 		    pattern[len + 4] = '$';
703 		    pattern[len + 5] = NUL;
704 		}
705 		break;
706 	    }
707 	}
708 	multiscan = FALSE;
709 
710 	if (fmt_ptr == NULL || idx == 'D' || idx == 'X')
711 	{
712 	    if (fmt_ptr != NULL)
713 	    {
714 		if (idx == 'D')				/* enter directory */
715 		{
716 		    if (*namebuf == NUL)
717 		    {
718 			EMSG(_("E379: Missing or empty directory name"));
719 			goto error2;
720 		    }
721 		    if ((directory = qf_push_dir(namebuf, &dir_stack)) == NULL)
722 			goto error2;
723 		}
724 		else if (idx == 'X')			/* leave directory */
725 		    directory = qf_pop_dir(&dir_stack);
726 	    }
727 	    namebuf[0] = NUL;		/* no match found, remove file name */
728 	    lnum = 0;			/* don't jump to this line */
729 	    valid = FALSE;
730 	    STRCPY(errmsg, IObuff);	/* copy whole line to error message */
731 	    if (fmt_ptr == NULL)
732 		multiline = multiignore = FALSE;
733 	}
734 	else if (fmt_ptr != NULL)
735 	{
736 	    /* honor %> item */
737 	    if (fmt_ptr->conthere)
738 		fmt_start = fmt_ptr;
739 
740 	    if (vim_strchr((char_u *)"AEWI", idx) != NULL)
741 		multiline = TRUE;	/* start of a multi-line message */
742 	    else if (vim_strchr((char_u *)"CZ", idx) != NULL)
743 	    {				/* continuation of multi-line msg */
744 		if (qfprev == NULL)
745 		    goto error2;
746 		if (*errmsg && !multiignore)
747 		{
748 		    len = (int)STRLEN(qfprev->qf_text);
749 		    if ((ptr = alloc((unsigned)(len + STRLEN(errmsg) + 2)))
750 								    == NULL)
751 			goto error2;
752 		    STRCPY(ptr, qfprev->qf_text);
753 		    vim_free(qfprev->qf_text);
754 		    qfprev->qf_text = ptr;
755 		    *(ptr += len) = '\n';
756 		    STRCPY(++ptr, errmsg);
757 		}
758 		if (qfprev->qf_nr == -1)
759 		    qfprev->qf_nr = enr;
760 		if (vim_isprintc(type) && !qfprev->qf_type)
761 		    qfprev->qf_type = type;  /* only printable chars allowed */
762 		if (!qfprev->qf_lnum)
763 		    qfprev->qf_lnum = lnum;
764 		if (!qfprev->qf_col)
765 		    qfprev->qf_col = col;
766 		qfprev->qf_viscol = use_viscol;
767 		if (!qfprev->qf_fnum)
768 		    qfprev->qf_fnum = qf_get_fnum(directory,
769 					*namebuf || directory ? namebuf
770 					  : currfile && valid ? currfile : 0);
771 		if (idx == 'Z')
772 		    multiline = multiignore = FALSE;
773 		line_breakcheck();
774 		continue;
775 	    }
776 	    else if (vim_strchr((char_u *)"OPQ", idx) != NULL)
777 	    {
778 		/* global file names */
779 		valid = FALSE;
780 		if (*namebuf == NUL || mch_getperm(namebuf) >= 0)
781 		{
782 		    if (*namebuf && idx == 'P')
783 			currfile = qf_push_dir(namebuf, &file_stack);
784 		    else if (idx == 'Q')
785 			currfile = qf_pop_dir(&file_stack);
786 		    *namebuf = NUL;
787 		    if (tail && *tail)
788 		    {
789 			STRMOVE(IObuff, skipwhite(tail));
790 			multiscan = TRUE;
791 			goto restofline;
792 		    }
793 		}
794 	    }
795 	    if (fmt_ptr->flags == '-')	/* generally exclude this line */
796 	    {
797 		if (multiline)
798 		    multiignore = TRUE;	/* also exclude continuation lines */
799 		continue;
800 	    }
801 	}
802 
803 	if (qf_add_entry(qi, &qfprev,
804 			directory,
805 			(*namebuf || directory)
806 			    ? namebuf
807 			    : ((currfile && valid) ? currfile : (char_u *)NULL),
808 			0,
809 			errmsg,
810 			lnum,
811 			col,
812 			use_viscol,
813 			pattern,
814 			enr,
815 			type,
816 			valid) == FAIL)
817 	    goto error2;
818 	line_breakcheck();
819     }
820     if (fd == NULL || !ferror(fd))
821     {
822 	if (qi->qf_lists[qi->qf_curlist].qf_index == 0)
823 	{
824 	    /* no valid entry found */
825 	    qi->qf_lists[qi->qf_curlist].qf_ptr =
826 		qi->qf_lists[qi->qf_curlist].qf_start;
827 	    qi->qf_lists[qi->qf_curlist].qf_index = 1;
828 	    qi->qf_lists[qi->qf_curlist].qf_nonevalid = TRUE;
829 	}
830 	else
831 	{
832 	    qi->qf_lists[qi->qf_curlist].qf_nonevalid = FALSE;
833 	    if (qi->qf_lists[qi->qf_curlist].qf_ptr == NULL)
834 		qi->qf_lists[qi->qf_curlist].qf_ptr =
835 		    qi->qf_lists[qi->qf_curlist].qf_start;
836 	}
837 	/* return number of matches */
838 	retval = qi->qf_lists[qi->qf_curlist].qf_count;
839 	goto qf_init_ok;
840     }
841     EMSG(_(e_readerrf));
842 error2:
843     qf_free(qi, qi->qf_curlist);
844     qi->qf_listcount--;
845     if (qi->qf_curlist > 0)
846 	--qi->qf_curlist;
847 qf_init_ok:
848     if (fd != NULL)
849 	fclose(fd);
850     for (fmt_ptr = fmt_first; fmt_ptr != NULL; fmt_ptr = fmt_first)
851     {
852 	fmt_first = fmt_ptr->next;
853 	vim_free(fmt_ptr->prog);
854 	vim_free(fmt_ptr);
855     }
856     qf_clean_dir_stack(&dir_stack);
857     qf_clean_dir_stack(&file_stack);
858 qf_init_end:
859     vim_free(namebuf);
860     vim_free(errmsg);
861     vim_free(pattern);
862     vim_free(fmtstr);
863 
864 #ifdef FEAT_WINDOWS
865     qf_update_buffer(qi);
866 #endif
867 
868     return retval;
869 }
870 
871 /*
872  * Prepare for adding a new quickfix list.
873  */
874     static void
875 qf_new_list(qi, qf_title)
876     qf_info_T	*qi;
877     char_u	*qf_title;
878 {
879     int		i;
880 
881     /*
882      * If the current entry is not the last entry, delete entries below
883      * the current entry.  This makes it possible to browse in a tree-like
884      * way with ":grep'.
885      */
886     while (qi->qf_listcount > qi->qf_curlist + 1)
887 	qf_free(qi, --qi->qf_listcount);
888 
889     /*
890      * When the stack is full, remove to oldest entry
891      * Otherwise, add a new entry.
892      */
893     if (qi->qf_listcount == LISTCOUNT)
894     {
895 	qf_free(qi, 0);
896 	for (i = 1; i < LISTCOUNT; ++i)
897 	    qi->qf_lists[i - 1] = qi->qf_lists[i];
898 	qi->qf_curlist = LISTCOUNT - 1;
899     }
900     else
901 	qi->qf_curlist = qi->qf_listcount++;
902     vim_memset(&qi->qf_lists[qi->qf_curlist], 0, (size_t)(sizeof(qf_list_T)));
903     if (qf_title != NULL)
904     {
905 	char_u *p = alloc((int)STRLEN(qf_title) + 2);
906 
907 	qi->qf_lists[qi->qf_curlist].qf_title = p;
908 	if (p != NULL)
909 	    sprintf((char *)p, ":%s", (char *)qf_title);
910     }
911 }
912 
913 /*
914  * Free a location list
915  */
916     static void
917 ll_free_all(pqi)
918     qf_info_T	**pqi;
919 {
920     int		i;
921     qf_info_T	*qi;
922 
923     qi = *pqi;
924     if (qi == NULL)
925 	return;
926     *pqi = NULL;	/* Remove reference to this list */
927 
928     qi->qf_refcount--;
929     if (qi->qf_refcount < 1)
930     {
931 	/* No references to this location list */
932 	for (i = 0; i < qi->qf_listcount; ++i)
933 	    qf_free(qi, i);
934 	vim_free(qi);
935     }
936 }
937 
938     void
939 qf_free_all(wp)
940     win_T	*wp;
941 {
942     int		i;
943     qf_info_T	*qi = &ql_info;
944 
945     if (wp != NULL)
946     {
947 	/* location list */
948 	ll_free_all(&wp->w_llist);
949 	ll_free_all(&wp->w_llist_ref);
950     }
951     else
952 	/* quickfix list */
953 	for (i = 0; i < qi->qf_listcount; ++i)
954 	    qf_free(qi, i);
955 }
956 
957 /*
958  * Add an entry to the end of the list of errors.
959  * Returns OK or FAIL.
960  */
961     static int
962 qf_add_entry(qi, prevp, dir, fname, bufnum, mesg, lnum, col, vis_col, pattern,
963 	     nr, type, valid)
964     qf_info_T	*qi;		/* quickfix list */
965     qfline_T	**prevp;	/* pointer to previously added entry or NULL */
966     char_u	*dir;		/* optional directory name */
967     char_u	*fname;		/* file name or NULL */
968     int		bufnum;		/* buffer number or zero */
969     char_u	*mesg;		/* message */
970     long	lnum;		/* line number */
971     int		col;		/* column */
972     int		vis_col;	/* using visual column */
973     char_u	*pattern;	/* search pattern */
974     int		nr;		/* error number */
975     int		type;		/* type character */
976     int		valid;		/* valid entry */
977 {
978     qfline_T	*qfp;
979 
980     if ((qfp = (qfline_T *)alloc((unsigned)sizeof(qfline_T))) == NULL)
981 	return FAIL;
982     if (bufnum != 0)
983 	qfp->qf_fnum = bufnum;
984     else
985 	qfp->qf_fnum = qf_get_fnum(dir, fname);
986     if ((qfp->qf_text = vim_strsave(mesg)) == NULL)
987     {
988 	vim_free(qfp);
989 	return FAIL;
990     }
991     qfp->qf_lnum = lnum;
992     qfp->qf_col = col;
993     qfp->qf_viscol = vis_col;
994     if (pattern == NULL || *pattern == NUL)
995 	qfp->qf_pattern = NULL;
996     else if ((qfp->qf_pattern = vim_strsave(pattern)) == NULL)
997     {
998 	vim_free(qfp->qf_text);
999 	vim_free(qfp);
1000 	return FAIL;
1001     }
1002     qfp->qf_nr = nr;
1003     if (type != 1 && !vim_isprintc(type)) /* only printable chars allowed */
1004 	type = 0;
1005     qfp->qf_type = type;
1006     qfp->qf_valid = valid;
1007 
1008     if (qi->qf_lists[qi->qf_curlist].qf_count == 0)
1009 				/* first element in the list */
1010     {
1011 	qi->qf_lists[qi->qf_curlist].qf_start = qfp;
1012 	qfp->qf_prev = qfp;	/* first element points to itself */
1013     }
1014     else
1015     {
1016 	qfp->qf_prev = *prevp;
1017 	(*prevp)->qf_next = qfp;
1018     }
1019     qfp->qf_next = qfp;	/* last element points to itself */
1020     qfp->qf_cleared = FALSE;
1021     *prevp = qfp;
1022     ++qi->qf_lists[qi->qf_curlist].qf_count;
1023     if (qi->qf_lists[qi->qf_curlist].qf_index == 0 && qfp->qf_valid)
1024 				/* first valid entry */
1025     {
1026 	qi->qf_lists[qi->qf_curlist].qf_index =
1027 	    qi->qf_lists[qi->qf_curlist].qf_count;
1028 	qi->qf_lists[qi->qf_curlist].qf_ptr = qfp;
1029     }
1030 
1031     return OK;
1032 }
1033 
1034 /*
1035  * Allocate a new location list
1036  */
1037     static qf_info_T *
1038 ll_new_list()
1039 {
1040     qf_info_T *qi;
1041 
1042     qi = (qf_info_T *)alloc((unsigned)sizeof(qf_info_T));
1043     if (qi != NULL)
1044     {
1045 	vim_memset(qi, 0, (size_t)(sizeof(qf_info_T)));
1046 	qi->qf_refcount++;
1047     }
1048 
1049     return qi;
1050 }
1051 
1052 /*
1053  * Return the location list for window 'wp'.
1054  * If not present, allocate a location list
1055  */
1056     static qf_info_T *
1057 ll_get_or_alloc_list(wp)
1058     win_T   *wp;
1059 {
1060     if (IS_LL_WINDOW(wp))
1061 	/* For a location list window, use the referenced location list */
1062 	return wp->w_llist_ref;
1063 
1064     /*
1065      * For a non-location list window, w_llist_ref should not point to a
1066      * location list.
1067      */
1068     ll_free_all(&wp->w_llist_ref);
1069 
1070     if (wp->w_llist == NULL)
1071 	wp->w_llist = ll_new_list();	    /* new location list */
1072     return wp->w_llist;
1073 }
1074 
1075 /*
1076  * Copy the location list from window "from" to window "to".
1077  */
1078     void
1079 copy_loclist(from, to)
1080     win_T	*from;
1081     win_T	*to;
1082 {
1083     qf_info_T	*qi;
1084     int		idx;
1085     int		i;
1086 
1087     /*
1088      * When copying from a location list window, copy the referenced
1089      * location list. For other windows, copy the location list for
1090      * that window.
1091      */
1092     if (IS_LL_WINDOW(from))
1093 	qi = from->w_llist_ref;
1094     else
1095 	qi = from->w_llist;
1096 
1097     if (qi == NULL)		    /* no location list to copy */
1098 	return;
1099 
1100     /* allocate a new location list */
1101     if ((to->w_llist = ll_new_list()) == NULL)
1102 	return;
1103 
1104     to->w_llist->qf_listcount = qi->qf_listcount;
1105 
1106     /* Copy the location lists one at a time */
1107     for (idx = 0; idx < qi->qf_listcount; idx++)
1108     {
1109 	qf_list_T   *from_qfl;
1110 	qf_list_T   *to_qfl;
1111 
1112 	to->w_llist->qf_curlist = idx;
1113 
1114 	from_qfl = &qi->qf_lists[idx];
1115 	to_qfl = &to->w_llist->qf_lists[idx];
1116 
1117 	/* Some of the fields are populated by qf_add_entry() */
1118 	to_qfl->qf_nonevalid = from_qfl->qf_nonevalid;
1119 	to_qfl->qf_count = 0;
1120 	to_qfl->qf_index = 0;
1121 	to_qfl->qf_start = NULL;
1122 	to_qfl->qf_ptr = NULL;
1123 	if (from_qfl->qf_title != NULL)
1124 	    to_qfl->qf_title = vim_strsave(from_qfl->qf_title);
1125 	else
1126 	    to_qfl->qf_title = NULL;
1127 
1128 	if (from_qfl->qf_count)
1129 	{
1130 	    qfline_T    *from_qfp;
1131 	    qfline_T    *prevp = NULL;
1132 
1133 	    /* copy all the location entries in this list */
1134 	    for (i = 0, from_qfp = from_qfl->qf_start; i < from_qfl->qf_count;
1135 		 ++i, from_qfp = from_qfp->qf_next)
1136 	    {
1137 		if (qf_add_entry(to->w_llist, &prevp,
1138 				 NULL,
1139 				 NULL,
1140 				 0,
1141 				 from_qfp->qf_text,
1142 				 from_qfp->qf_lnum,
1143 				 from_qfp->qf_col,
1144 				 from_qfp->qf_viscol,
1145 				 from_qfp->qf_pattern,
1146 				 from_qfp->qf_nr,
1147 				 0,
1148 				 from_qfp->qf_valid) == FAIL)
1149 		{
1150 		    qf_free_all(to);
1151 		    return;
1152 		}
1153 		/*
1154 		 * qf_add_entry() will not set the qf_num field, as the
1155 		 * directory and file names are not supplied. So the qf_fnum
1156 		 * field is copied here.
1157 		 */
1158 		prevp->qf_fnum = from_qfp->qf_fnum; /* file number */
1159 		prevp->qf_type = from_qfp->qf_type; /* error type */
1160 		if (from_qfl->qf_ptr == from_qfp)
1161 		    to_qfl->qf_ptr = prevp;	    /* current location */
1162 	    }
1163 	}
1164 
1165 	to_qfl->qf_index = from_qfl->qf_index;	/* current index in the list */
1166 
1167 	/* When no valid entries are present in the list, qf_ptr points to
1168 	 * the first item in the list */
1169 	if (to_qfl->qf_nonevalid)
1170 	    to_qfl->qf_ptr = to_qfl->qf_start;
1171     }
1172 
1173     to->w_llist->qf_curlist = qi->qf_curlist;	/* current list */
1174 }
1175 
1176 /*
1177  * get buffer number for file "dir.name"
1178  */
1179     static int
1180 qf_get_fnum(directory, fname)
1181     char_u   *directory;
1182     char_u   *fname;
1183 {
1184     if (fname == NULL || *fname == NUL)		/* no file name */
1185 	return 0;
1186     {
1187 	char_u	    *ptr;
1188 	int	    fnum;
1189 
1190 #ifdef VMS
1191 	vms_remove_version(fname);
1192 #endif
1193 #ifdef BACKSLASH_IN_FILENAME
1194 	if (directory != NULL)
1195 	    slash_adjust(directory);
1196 	slash_adjust(fname);
1197 #endif
1198 	if (directory != NULL && !vim_isAbsName(fname)
1199 		&& (ptr = concat_fnames(directory, fname, TRUE)) != NULL)
1200 	{
1201 	    /*
1202 	     * Here we check if the file really exists.
1203 	     * This should normally be true, but if make works without
1204 	     * "leaving directory"-messages we might have missed a
1205 	     * directory change.
1206 	     */
1207 	    if (mch_getperm(ptr) < 0)
1208 	    {
1209 		vim_free(ptr);
1210 		directory = qf_guess_filepath(fname);
1211 		if (directory)
1212 		    ptr = concat_fnames(directory, fname, TRUE);
1213 		else
1214 		    ptr = vim_strsave(fname);
1215 	    }
1216 	    /* Use concatenated directory name and file name */
1217 	    fnum = buflist_add(ptr, 0);
1218 	    vim_free(ptr);
1219 	    return fnum;
1220 	}
1221 	return buflist_add(fname, 0);
1222     }
1223 }
1224 
1225 /*
1226  * push dirbuf onto the directory stack and return pointer to actual dir or
1227  * NULL on error
1228  */
1229     static char_u *
1230 qf_push_dir(dirbuf, stackptr)
1231     char_u		*dirbuf;
1232     struct dir_stack_T	**stackptr;
1233 {
1234     struct dir_stack_T  *ds_new;
1235     struct dir_stack_T  *ds_ptr;
1236 
1237     /* allocate new stack element and hook it in */
1238     ds_new = (struct dir_stack_T *)alloc((unsigned)sizeof(struct dir_stack_T));
1239     if (ds_new == NULL)
1240 	return NULL;
1241 
1242     ds_new->next = *stackptr;
1243     *stackptr = ds_new;
1244 
1245     /* store directory on the stack */
1246     if (vim_isAbsName(dirbuf)
1247 	    || (*stackptr)->next == NULL
1248 	    || (*stackptr && dir_stack != *stackptr))
1249 	(*stackptr)->dirname = vim_strsave(dirbuf);
1250     else
1251     {
1252 	/* Okay we don't have an absolute path.
1253 	 * dirbuf must be a subdir of one of the directories on the stack.
1254 	 * Let's search...
1255 	 */
1256 	ds_new = (*stackptr)->next;
1257 	(*stackptr)->dirname = NULL;
1258 	while (ds_new)
1259 	{
1260 	    vim_free((*stackptr)->dirname);
1261 	    (*stackptr)->dirname = concat_fnames(ds_new->dirname, dirbuf,
1262 		    TRUE);
1263 	    if (mch_isdir((*stackptr)->dirname) == TRUE)
1264 		break;
1265 
1266 	    ds_new = ds_new->next;
1267 	}
1268 
1269 	/* clean up all dirs we already left */
1270 	while ((*stackptr)->next != ds_new)
1271 	{
1272 	    ds_ptr = (*stackptr)->next;
1273 	    (*stackptr)->next = (*stackptr)->next->next;
1274 	    vim_free(ds_ptr->dirname);
1275 	    vim_free(ds_ptr);
1276 	}
1277 
1278 	/* Nothing found -> it must be on top level */
1279 	if (ds_new == NULL)
1280 	{
1281 	    vim_free((*stackptr)->dirname);
1282 	    (*stackptr)->dirname = vim_strsave(dirbuf);
1283 	}
1284     }
1285 
1286     if ((*stackptr)->dirname != NULL)
1287 	return (*stackptr)->dirname;
1288     else
1289     {
1290 	ds_ptr = *stackptr;
1291 	*stackptr = (*stackptr)->next;
1292 	vim_free(ds_ptr);
1293 	return NULL;
1294     }
1295 }
1296 
1297 
1298 /*
1299  * pop dirbuf from the directory stack and return previous directory or NULL if
1300  * stack is empty
1301  */
1302     static char_u *
1303 qf_pop_dir(stackptr)
1304     struct dir_stack_T	**stackptr;
1305 {
1306     struct dir_stack_T  *ds_ptr;
1307 
1308     /* TODO: Should we check if dirbuf is the directory on top of the stack?
1309      * What to do if it isn't? */
1310 
1311     /* pop top element and free it */
1312     if (*stackptr != NULL)
1313     {
1314 	ds_ptr = *stackptr;
1315 	*stackptr = (*stackptr)->next;
1316 	vim_free(ds_ptr->dirname);
1317 	vim_free(ds_ptr);
1318     }
1319 
1320     /* return NEW top element as current dir or NULL if stack is empty*/
1321     return *stackptr ? (*stackptr)->dirname : NULL;
1322 }
1323 
1324 /*
1325  * clean up directory stack
1326  */
1327     static void
1328 qf_clean_dir_stack(stackptr)
1329     struct dir_stack_T	**stackptr;
1330 {
1331     struct dir_stack_T  *ds_ptr;
1332 
1333     while ((ds_ptr = *stackptr) != NULL)
1334     {
1335 	*stackptr = (*stackptr)->next;
1336 	vim_free(ds_ptr->dirname);
1337 	vim_free(ds_ptr);
1338     }
1339 }
1340 
1341 /*
1342  * Check in which directory of the directory stack the given file can be
1343  * found.
1344  * Returns a pointer to the directory name or NULL if not found
1345  * Cleans up intermediate directory entries.
1346  *
1347  * TODO: How to solve the following problem?
1348  * If we have the this directory tree:
1349  *     ./
1350  *     ./aa
1351  *     ./aa/bb
1352  *     ./bb
1353  *     ./bb/x.c
1354  * and make says:
1355  *     making all in aa
1356  *     making all in bb
1357  *     x.c:9: Error
1358  * Then qf_push_dir thinks we are in ./aa/bb, but we are in ./bb.
1359  * qf_guess_filepath will return NULL.
1360  */
1361     static char_u *
1362 qf_guess_filepath(filename)
1363     char_u *filename;
1364 {
1365     struct dir_stack_T     *ds_ptr;
1366     struct dir_stack_T     *ds_tmp;
1367     char_u		   *fullname;
1368 
1369     /* no dirs on the stack - there's nothing we can do */
1370     if (dir_stack == NULL)
1371 	return NULL;
1372 
1373     ds_ptr = dir_stack->next;
1374     fullname = NULL;
1375     while (ds_ptr)
1376     {
1377 	vim_free(fullname);
1378 	fullname = concat_fnames(ds_ptr->dirname, filename, TRUE);
1379 
1380 	/* If concat_fnames failed, just go on. The worst thing that can happen
1381 	 * is that we delete the entire stack.
1382 	 */
1383 	if ((fullname != NULL) && (mch_getperm(fullname) >= 0))
1384 	    break;
1385 
1386 	ds_ptr = ds_ptr->next;
1387     }
1388 
1389     vim_free(fullname);
1390 
1391     /* clean up all dirs we already left */
1392     while (dir_stack->next != ds_ptr)
1393     {
1394 	ds_tmp = dir_stack->next;
1395 	dir_stack->next = dir_stack->next->next;
1396 	vim_free(ds_tmp->dirname);
1397 	vim_free(ds_tmp);
1398     }
1399 
1400     return ds_ptr==NULL? NULL: ds_ptr->dirname;
1401 
1402 }
1403 
1404 /*
1405  * jump to a quickfix line
1406  * if dir == FORWARD go "errornr" valid entries forward
1407  * if dir == BACKWARD go "errornr" valid entries backward
1408  * if dir == FORWARD_FILE go "errornr" valid entries files backward
1409  * if dir == BACKWARD_FILE go "errornr" valid entries files backward
1410  * else if "errornr" is zero, redisplay the same line
1411  * else go to entry "errornr"
1412  */
1413     void
1414 qf_jump(qi, dir, errornr, forceit)
1415     qf_info_T	*qi;
1416     int		dir;
1417     int		errornr;
1418     int		forceit;
1419 {
1420     qf_info_T		*ll_ref;
1421     qfline_T		*qf_ptr;
1422     qfline_T		*old_qf_ptr;
1423     int			qf_index;
1424     int			old_qf_fnum;
1425     int			old_qf_index;
1426     int			prev_index;
1427     static char_u	*e_no_more_items = (char_u *)N_("E553: No more items");
1428     char_u		*err = e_no_more_items;
1429     linenr_T		i;
1430     buf_T		*old_curbuf;
1431     linenr_T		old_lnum;
1432     colnr_T		screen_col;
1433     colnr_T		char_col;
1434     char_u		*line;
1435 #ifdef FEAT_WINDOWS
1436     char_u		*old_swb = p_swb;
1437     unsigned		old_swb_flags = swb_flags;
1438     int			opened_window = FALSE;
1439     win_T		*win;
1440     win_T		*altwin;
1441     int			flags;
1442 #endif
1443     win_T		*oldwin = curwin;
1444     int			print_message = TRUE;
1445     int			len;
1446 #ifdef FEAT_FOLDING
1447     int			old_KeyTyped = KeyTyped; /* getting file may reset it */
1448 #endif
1449     int			ok = OK;
1450     int			usable_win;
1451 
1452     if (qi == NULL)
1453 	qi = &ql_info;
1454 
1455     if (qi->qf_curlist >= qi->qf_listcount
1456 	|| qi->qf_lists[qi->qf_curlist].qf_count == 0)
1457     {
1458 	EMSG(_(e_quickfix));
1459 	return;
1460     }
1461 
1462     qf_ptr = qi->qf_lists[qi->qf_curlist].qf_ptr;
1463     old_qf_ptr = qf_ptr;
1464     qf_index = qi->qf_lists[qi->qf_curlist].qf_index;
1465     old_qf_index = qf_index;
1466     if (dir == FORWARD || dir == FORWARD_FILE)	    /* next valid entry */
1467     {
1468 	while (errornr--)
1469 	{
1470 	    old_qf_ptr = qf_ptr;
1471 	    prev_index = qf_index;
1472 	    old_qf_fnum = qf_ptr->qf_fnum;
1473 	    do
1474 	    {
1475 		if (qf_index == qi->qf_lists[qi->qf_curlist].qf_count
1476 						   || qf_ptr->qf_next == NULL)
1477 		{
1478 		    qf_ptr = old_qf_ptr;
1479 		    qf_index = prev_index;
1480 		    if (err != NULL)
1481 		    {
1482 			EMSG(_(err));
1483 			goto theend;
1484 		    }
1485 		    errornr = 0;
1486 		    break;
1487 		}
1488 		++qf_index;
1489 		qf_ptr = qf_ptr->qf_next;
1490 	    } while ((!qi->qf_lists[qi->qf_curlist].qf_nonevalid
1491 		      && !qf_ptr->qf_valid)
1492 		  || (dir == FORWARD_FILE && qf_ptr->qf_fnum == old_qf_fnum));
1493 	    err = NULL;
1494 	}
1495     }
1496     else if (dir == BACKWARD || dir == BACKWARD_FILE)  /* prev. valid entry */
1497     {
1498 	while (errornr--)
1499 	{
1500 	    old_qf_ptr = qf_ptr;
1501 	    prev_index = qf_index;
1502 	    old_qf_fnum = qf_ptr->qf_fnum;
1503 	    do
1504 	    {
1505 		if (qf_index == 1 || qf_ptr->qf_prev == NULL)
1506 		{
1507 		    qf_ptr = old_qf_ptr;
1508 		    qf_index = prev_index;
1509 		    if (err != NULL)
1510 		    {
1511 			EMSG(_(err));
1512 			goto theend;
1513 		    }
1514 		    errornr = 0;
1515 		    break;
1516 		}
1517 		--qf_index;
1518 		qf_ptr = qf_ptr->qf_prev;
1519 	    } while ((!qi->qf_lists[qi->qf_curlist].qf_nonevalid
1520 		      && !qf_ptr->qf_valid)
1521 		  || (dir == BACKWARD_FILE && qf_ptr->qf_fnum == old_qf_fnum));
1522 	    err = NULL;
1523 	}
1524     }
1525     else if (errornr != 0)	/* go to specified number */
1526     {
1527 	while (errornr < qf_index && qf_index > 1 && qf_ptr->qf_prev != NULL)
1528 	{
1529 	    --qf_index;
1530 	    qf_ptr = qf_ptr->qf_prev;
1531 	}
1532 	while (errornr > qf_index && qf_index <
1533 				    qi->qf_lists[qi->qf_curlist].qf_count
1534 						   && qf_ptr->qf_next != NULL)
1535 	{
1536 	    ++qf_index;
1537 	    qf_ptr = qf_ptr->qf_next;
1538 	}
1539     }
1540 
1541 #ifdef FEAT_WINDOWS
1542     qi->qf_lists[qi->qf_curlist].qf_index = qf_index;
1543     if (qf_win_pos_update(qi, old_qf_index))
1544 	/* No need to print the error message if it's visible in the error
1545 	 * window */
1546 	print_message = FALSE;
1547 
1548     /*
1549      * For ":helpgrep" find a help window or open one.
1550      */
1551     if (qf_ptr->qf_type == 1 && (!curwin->w_buffer->b_help || cmdmod.tab != 0))
1552     {
1553 	win_T	*wp;
1554 
1555 	if (cmdmod.tab != 0)
1556 	    wp = NULL;
1557 	else
1558 	    for (wp = firstwin; wp != NULL; wp = wp->w_next)
1559 		if (wp->w_buffer != NULL && wp->w_buffer->b_help)
1560 		    break;
1561 	if (wp != NULL && wp->w_buffer->b_nwindows > 0)
1562 	    win_enter(wp, TRUE);
1563 	else
1564 	{
1565 	    /*
1566 	     * Split off help window; put it at far top if no position
1567 	     * specified, the current window is vertically split and narrow.
1568 	     */
1569 	    flags = WSP_HELP;
1570 # ifdef FEAT_VERTSPLIT
1571 	    if (cmdmod.split == 0 && curwin->w_width != Columns
1572 						      && curwin->w_width < 80)
1573 		flags |= WSP_TOP;
1574 # endif
1575 	    if (qi != &ql_info)
1576 		flags |= WSP_NEWLOC;  /* don't copy the location list */
1577 
1578 	    if (win_split(0, flags) == FAIL)
1579 		goto theend;
1580 	    opened_window = TRUE;	/* close it when fail */
1581 
1582 	    if (curwin->w_height < p_hh)
1583 		win_setheight((int)p_hh);
1584 
1585 	    if (qi != &ql_info)	    /* not a quickfix list */
1586 	    {
1587 		/* The new window should use the supplied location list */
1588 		curwin->w_llist = qi;
1589 		qi->qf_refcount++;
1590 	    }
1591 	}
1592 
1593 	if (!p_im)
1594 	    restart_edit = 0;	    /* don't want insert mode in help file */
1595     }
1596 
1597     /*
1598      * If currently in the quickfix window, find another window to show the
1599      * file in.
1600      */
1601     if (bt_quickfix(curbuf) && !opened_window)
1602     {
1603 	/*
1604 	 * If there is no file specified, we don't know where to go.
1605 	 * But do advance, otherwise ":cn" gets stuck.
1606 	 */
1607 	if (qf_ptr->qf_fnum == 0)
1608 	    goto theend;
1609 
1610 	/* Locate a window showing a normal buffer */
1611 	usable_win = 0;
1612 	FOR_ALL_WINDOWS(win)
1613 	    if (win->w_buffer->b_p_bt[0] == NUL)
1614 	    {
1615 		usable_win = 1;
1616 		break;
1617 	    }
1618 
1619 	/*
1620 	 * If no usable window is found and 'switchbuf' contains "usetab"
1621 	 * then search in other tabs.
1622 	 */
1623 	if (!usable_win && (swb_flags & SWB_USETAB))
1624 	{
1625 	    tabpage_T	*tp;
1626 	    win_T	*wp;
1627 
1628 	    FOR_ALL_TAB_WINDOWS(tp, wp)
1629 	    {
1630 		if (wp->w_buffer->b_fnum == qf_ptr->qf_fnum)
1631 		{
1632 		    goto_tabpage_win(tp, wp);
1633 		    usable_win = 1;
1634 		    goto win_found;
1635 		}
1636 	    }
1637 	}
1638 win_found:
1639 
1640 	/*
1641 	 * If there is only one window and it is the quickfix window, create a
1642 	 * new one above the quickfix window.
1643 	 */
1644 	if (((firstwin == lastwin) && bt_quickfix(curbuf)) || !usable_win)
1645 	{
1646 	    ll_ref = curwin->w_llist_ref;
1647 
1648 	    flags = WSP_ABOVE;
1649 	    if (ll_ref != NULL)
1650 		flags |= WSP_NEWLOC;
1651 	    if (win_split(0, flags) == FAIL)
1652 		goto failed;		/* not enough room for window */
1653 	    opened_window = TRUE;	/* close it when fail */
1654 	    p_swb = empty_option;	/* don't split again */
1655 	    swb_flags = 0;
1656 	    RESET_BINDING(curwin);
1657 	    if (ll_ref != NULL)
1658 	    {
1659 		/* The new window should use the location list from the
1660 		 * location list window */
1661 		curwin->w_llist = ll_ref;
1662 		ll_ref->qf_refcount++;
1663 	    }
1664 	}
1665 	else
1666 	{
1667 	    if (curwin->w_llist_ref != NULL)
1668 	    {
1669 		/* In a location window */
1670 		ll_ref = curwin->w_llist_ref;
1671 
1672 		/* Find the window with the same location list */
1673 		FOR_ALL_WINDOWS(win)
1674 		    if (win->w_llist == ll_ref)
1675 			break;
1676 		if (win == NULL)
1677 		{
1678 		    /* Find the window showing the selected file */
1679 		    FOR_ALL_WINDOWS(win)
1680 			if (win->w_buffer->b_fnum == qf_ptr->qf_fnum)
1681 			    break;
1682 		    if (win == NULL)
1683 		    {
1684 			/* Find a previous usable window */
1685 			win = curwin;
1686 			do
1687 			{
1688 			    if (win->w_buffer->b_p_bt[0] == NUL)
1689 				break;
1690 			    if (win->w_prev == NULL)
1691 				win = lastwin;	/* wrap around the top */
1692 			    else
1693 				win = win->w_prev; /* go to previous window */
1694 			} while (win != curwin);
1695 		    }
1696 		}
1697 		win_goto(win);
1698 
1699 		/* If the location list for the window is not set, then set it
1700 		 * to the location list from the location window */
1701 		if (win->w_llist == NULL)
1702 		{
1703 		    win->w_llist = ll_ref;
1704 		    ll_ref->qf_refcount++;
1705 		}
1706 	    }
1707 	    else
1708 	    {
1709 
1710 	    /*
1711 	     * Try to find a window that shows the right buffer.
1712 	     * Default to the window just above the quickfix buffer.
1713 	     */
1714 	    win = curwin;
1715 	    altwin = NULL;
1716 	    for (;;)
1717 	    {
1718 		if (win->w_buffer->b_fnum == qf_ptr->qf_fnum)
1719 		    break;
1720 		if (win->w_prev == NULL)
1721 		    win = lastwin;	/* wrap around the top */
1722 		else
1723 		    win = win->w_prev;	/* go to previous window */
1724 
1725 		if (IS_QF_WINDOW(win))
1726 		{
1727 		    /* Didn't find it, go to the window before the quickfix
1728 		     * window. */
1729 		    if (altwin != NULL)
1730 			win = altwin;
1731 		    else if (curwin->w_prev != NULL)
1732 			win = curwin->w_prev;
1733 		    else
1734 			win = curwin->w_next;
1735 		    break;
1736 		}
1737 
1738 		/* Remember a usable window. */
1739 		if (altwin == NULL && !win->w_p_pvw
1740 					   && win->w_buffer->b_p_bt[0] == NUL)
1741 		    altwin = win;
1742 	    }
1743 
1744 	    win_goto(win);
1745 	    }
1746 	}
1747     }
1748 #endif
1749 
1750     /*
1751      * If there is a file name,
1752      * read the wanted file if needed, and check autowrite etc.
1753      */
1754     old_curbuf = curbuf;
1755     old_lnum = curwin->w_cursor.lnum;
1756 
1757     if (qf_ptr->qf_fnum != 0)
1758     {
1759 	if (qf_ptr->qf_type == 1)
1760 	{
1761 	    /* Open help file (do_ecmd() will set b_help flag, readfile() will
1762 	     * set b_p_ro flag). */
1763 	    if (!can_abandon(curbuf, forceit))
1764 	    {
1765 		EMSG(_(e_nowrtmsg));
1766 		ok = FALSE;
1767 	    }
1768 	    else
1769 		ok = do_ecmd(qf_ptr->qf_fnum, NULL, NULL, NULL, (linenr_T)1,
1770 					   ECMD_HIDE + ECMD_SET_HELP,
1771 					   oldwin == curwin ? curwin : NULL);
1772 	}
1773 	else
1774 	    ok = buflist_getfile(qf_ptr->qf_fnum,
1775 			    (linenr_T)1, GETF_SETMARK | GETF_SWITCH, forceit);
1776     }
1777 
1778     if (ok == OK)
1779     {
1780 	/* When not switched to another buffer, still need to set pc mark */
1781 	if (curbuf == old_curbuf)
1782 	    setpcmark();
1783 
1784 	if (qf_ptr->qf_pattern == NULL)
1785 	{
1786 	    /*
1787 	     * Go to line with error, unless qf_lnum is 0.
1788 	     */
1789 	    i = qf_ptr->qf_lnum;
1790 	    if (i > 0)
1791 	    {
1792 		if (i > curbuf->b_ml.ml_line_count)
1793 		    i = curbuf->b_ml.ml_line_count;
1794 		curwin->w_cursor.lnum = i;
1795 	    }
1796 	    if (qf_ptr->qf_col > 0)
1797 	    {
1798 		curwin->w_cursor.col = qf_ptr->qf_col - 1;
1799 		if (qf_ptr->qf_viscol == TRUE)
1800 		{
1801 		    /*
1802 		     * Check each character from the beginning of the error
1803 		     * line up to the error column.  For each tab character
1804 		     * found, reduce the error column value by the length of
1805 		     * a tab character.
1806 		     */
1807 		    line = ml_get_curline();
1808 		    screen_col = 0;
1809 		    for (char_col = 0; char_col < curwin->w_cursor.col; ++char_col)
1810 		    {
1811 			if (*line == NUL)
1812 			    break;
1813 			if (*line++ == '\t')
1814 			{
1815 			    curwin->w_cursor.col -= 7 - (screen_col % 8);
1816 			    screen_col += 8 - (screen_col % 8);
1817 			}
1818 			else
1819 			    ++screen_col;
1820 		    }
1821 		}
1822 		check_cursor();
1823 	    }
1824 	    else
1825 		beginline(BL_WHITE | BL_FIX);
1826 	}
1827 	else
1828 	{
1829 	    pos_T save_cursor;
1830 
1831 	    /* Move the cursor to the first line in the buffer */
1832 	    save_cursor = curwin->w_cursor;
1833 	    curwin->w_cursor.lnum = 0;
1834 	    if (!do_search(NULL, '/', qf_ptr->qf_pattern, (long)1,
1835 							   SEARCH_KEEP, NULL))
1836 		curwin->w_cursor = save_cursor;
1837 	}
1838 
1839 #ifdef FEAT_FOLDING
1840 	if ((fdo_flags & FDO_QUICKFIX) && old_KeyTyped)
1841 	    foldOpenCursor();
1842 #endif
1843 	if (print_message)
1844 	{
1845 	    /* Update the screen before showing the message, unless the screen
1846 	     * scrolled up. */
1847 	    if (!msg_scrolled)
1848 		update_topline_redraw();
1849 	    sprintf((char *)IObuff, _("(%d of %d)%s%s: "), qf_index,
1850 		    qi->qf_lists[qi->qf_curlist].qf_count,
1851 		    qf_ptr->qf_cleared ? _(" (line deleted)") : "",
1852 		    (char *)qf_types(qf_ptr->qf_type, qf_ptr->qf_nr));
1853 	    /* Add the message, skipping leading whitespace and newlines. */
1854 	    len = (int)STRLEN(IObuff);
1855 	    qf_fmt_text(skipwhite(qf_ptr->qf_text), IObuff + len, IOSIZE - len);
1856 
1857 	    /* Output the message.  Overwrite to avoid scrolling when the 'O'
1858 	     * flag is present in 'shortmess'; But when not jumping, print the
1859 	     * whole message. */
1860 	    i = msg_scroll;
1861 	    if (curbuf == old_curbuf && curwin->w_cursor.lnum == old_lnum)
1862 		msg_scroll = TRUE;
1863 	    else if (!msg_scrolled && shortmess(SHM_OVERALL))
1864 		msg_scroll = FALSE;
1865 	    msg_attr_keep(IObuff, 0, TRUE);
1866 	    msg_scroll = i;
1867 	}
1868     }
1869     else
1870     {
1871 #ifdef FEAT_WINDOWS
1872 	if (opened_window)
1873 	    win_close(curwin, TRUE);    /* Close opened window */
1874 #endif
1875 	if (qf_ptr->qf_fnum != 0)
1876 	{
1877 	    /*
1878 	     * Couldn't open file, so put index back where it was.  This could
1879 	     * happen if the file was readonly and we changed something.
1880 	     */
1881 #ifdef FEAT_WINDOWS
1882 failed:
1883 #endif
1884 	    qf_ptr = old_qf_ptr;
1885 	    qf_index = old_qf_index;
1886 	}
1887     }
1888 theend:
1889     qi->qf_lists[qi->qf_curlist].qf_ptr = qf_ptr;
1890     qi->qf_lists[qi->qf_curlist].qf_index = qf_index;
1891 #ifdef FEAT_WINDOWS
1892     if (p_swb != old_swb && opened_window)
1893     {
1894 	/* Restore old 'switchbuf' value, but not when an autocommand or
1895 	 * modeline has changed the value. */
1896 	if (p_swb == empty_option)
1897 	{
1898 	    p_swb = old_swb;
1899 	    swb_flags = old_swb_flags;
1900 	}
1901 	else
1902 	    free_string_option(old_swb);
1903     }
1904 #endif
1905 }
1906 
1907 /*
1908  * ":clist": list all errors
1909  * ":llist": list all locations
1910  */
1911     void
1912 qf_list(eap)
1913     exarg_T	*eap;
1914 {
1915     buf_T	*buf;
1916     char_u	*fname;
1917     qfline_T	*qfp;
1918     int		i;
1919     int		idx1 = 1;
1920     int		idx2 = -1;
1921     char_u	*arg = eap->arg;
1922     int		all = eap->forceit;	/* if not :cl!, only show
1923 						   recognised errors */
1924     qf_info_T	*qi = &ql_info;
1925 
1926     if (eap->cmdidx == CMD_llist)
1927     {
1928 	qi = GET_LOC_LIST(curwin);
1929 	if (qi == NULL)
1930 	{
1931 	    EMSG(_(e_loclist));
1932 	    return;
1933 	}
1934     }
1935 
1936     if (qi->qf_curlist >= qi->qf_listcount
1937 	|| qi->qf_lists[qi->qf_curlist].qf_count == 0)
1938     {
1939 	EMSG(_(e_quickfix));
1940 	return;
1941     }
1942     if (!get_list_range(&arg, &idx1, &idx2) || *arg != NUL)
1943     {
1944 	EMSG(_(e_trailing));
1945 	return;
1946     }
1947     i = qi->qf_lists[qi->qf_curlist].qf_count;
1948     if (idx1 < 0)
1949 	idx1 = (-idx1 > i) ? 0 : idx1 + i + 1;
1950     if (idx2 < 0)
1951 	idx2 = (-idx2 > i) ? 0 : idx2 + i + 1;
1952 
1953     if (qi->qf_lists[qi->qf_curlist].qf_nonevalid)
1954 	all = TRUE;
1955     qfp = qi->qf_lists[qi->qf_curlist].qf_start;
1956     for (i = 1; !got_int && i <= qi->qf_lists[qi->qf_curlist].qf_count; )
1957     {
1958 	if ((qfp->qf_valid || all) && idx1 <= i && i <= idx2)
1959 	{
1960 	    msg_putchar('\n');
1961 	    if (got_int)
1962 		break;
1963 
1964 	    fname = NULL;
1965 	    if (qfp->qf_fnum != 0
1966 			      && (buf = buflist_findnr(qfp->qf_fnum)) != NULL)
1967 	    {
1968 		fname = buf->b_fname;
1969 		if (qfp->qf_type == 1)	/* :helpgrep */
1970 		    fname = gettail(fname);
1971 	    }
1972 	    if (fname == NULL)
1973 		sprintf((char *)IObuff, "%2d", i);
1974 	    else
1975 		vim_snprintf((char *)IObuff, IOSIZE, "%2d %s",
1976 							    i, (char *)fname);
1977 	    msg_outtrans_attr(IObuff, i == qi->qf_lists[qi->qf_curlist].qf_index
1978 					   ? hl_attr(HLF_L) : hl_attr(HLF_D));
1979 	    if (qfp->qf_lnum == 0)
1980 		IObuff[0] = NUL;
1981 	    else if (qfp->qf_col == 0)
1982 		sprintf((char *)IObuff, ":%ld", qfp->qf_lnum);
1983 	    else
1984 		sprintf((char *)IObuff, ":%ld col %d",
1985 						   qfp->qf_lnum, qfp->qf_col);
1986 	    sprintf((char *)IObuff + STRLEN(IObuff), "%s:",
1987 				  (char *)qf_types(qfp->qf_type, qfp->qf_nr));
1988 	    msg_puts_attr(IObuff, hl_attr(HLF_N));
1989 	    if (qfp->qf_pattern != NULL)
1990 	    {
1991 		qf_fmt_text(qfp->qf_pattern, IObuff, IOSIZE);
1992 		STRCAT(IObuff, ":");
1993 		msg_puts(IObuff);
1994 	    }
1995 	    msg_puts((char_u *)" ");
1996 
1997 	    /* Remove newlines and leading whitespace from the text.  For an
1998 	     * unrecognized line keep the indent, the compiler may mark a word
1999 	     * with ^^^^. */
2000 	    qf_fmt_text((fname != NULL || qfp->qf_lnum != 0)
2001 				     ? skipwhite(qfp->qf_text) : qfp->qf_text,
2002 							      IObuff, IOSIZE);
2003 	    msg_prt_line(IObuff, FALSE);
2004 	    out_flush();		/* show one line at a time */
2005 	}
2006 
2007 	qfp = qfp->qf_next;
2008 	++i;
2009 	ui_breakcheck();
2010     }
2011 }
2012 
2013 /*
2014  * Remove newlines and leading whitespace from an error message.
2015  * Put the result in "buf[bufsize]".
2016  */
2017     static void
2018 qf_fmt_text(text, buf, bufsize)
2019     char_u	*text;
2020     char_u	*buf;
2021     int		bufsize;
2022 {
2023     int		i;
2024     char_u	*p = text;
2025 
2026     for (i = 0; *p != NUL && i < bufsize - 1; ++i)
2027     {
2028 	if (*p == '\n')
2029 	{
2030 	    buf[i] = ' ';
2031 	    while (*++p != NUL)
2032 		if (!vim_iswhite(*p) && *p != '\n')
2033 		    break;
2034 	}
2035 	else
2036 	    buf[i] = *p++;
2037     }
2038     buf[i] = NUL;
2039 }
2040 
2041 /*
2042  * ":colder [count]": Up in the quickfix stack.
2043  * ":cnewer [count]": Down in the quickfix stack.
2044  * ":lolder [count]": Up in the location list stack.
2045  * ":lnewer [count]": Down in the location list stack.
2046  */
2047     void
2048 qf_age(eap)
2049     exarg_T	*eap;
2050 {
2051     qf_info_T	*qi = &ql_info;
2052     int		count;
2053 
2054     if (eap->cmdidx == CMD_lolder || eap->cmdidx == CMD_lnewer)
2055     {
2056 	qi = GET_LOC_LIST(curwin);
2057 	if (qi == NULL)
2058 	{
2059 	    EMSG(_(e_loclist));
2060 	    return;
2061 	}
2062     }
2063 
2064     if (eap->addr_count != 0)
2065 	count = eap->line2;
2066     else
2067 	count = 1;
2068     while (count--)
2069     {
2070 	if (eap->cmdidx == CMD_colder || eap->cmdidx == CMD_lolder)
2071 	{
2072 	    if (qi->qf_curlist == 0)
2073 	    {
2074 		EMSG(_("E380: At bottom of quickfix stack"));
2075 		return;
2076 	    }
2077 	    --qi->qf_curlist;
2078 	}
2079 	else
2080 	{
2081 	    if (qi->qf_curlist >= qi->qf_listcount - 1)
2082 	    {
2083 		EMSG(_("E381: At top of quickfix stack"));
2084 		return;
2085 	    }
2086 	    ++qi->qf_curlist;
2087 	}
2088     }
2089     qf_msg(qi);
2090 
2091 }
2092 
2093     static void
2094 qf_msg(qi)
2095     qf_info_T	*qi;
2096 {
2097     smsg((char_u *)_("error list %d of %d; %d errors"),
2098 	    qi->qf_curlist + 1, qi->qf_listcount,
2099 	    qi->qf_lists[qi->qf_curlist].qf_count);
2100 #ifdef FEAT_WINDOWS
2101     qf_update_buffer(qi);
2102 #endif
2103 }
2104 
2105 /*
2106  * Free error list "idx".
2107  */
2108     static void
2109 qf_free(qi, idx)
2110     qf_info_T	*qi;
2111     int		idx;
2112 {
2113     qfline_T	*qfp;
2114 
2115     while (qi->qf_lists[idx].qf_count)
2116     {
2117 	qfp = qi->qf_lists[idx].qf_start->qf_next;
2118 	vim_free(qi->qf_lists[idx].qf_start->qf_text);
2119 	vim_free(qi->qf_lists[idx].qf_start->qf_pattern);
2120 	vim_free(qi->qf_lists[idx].qf_start);
2121 	qi->qf_lists[idx].qf_start = qfp;
2122 	--qi->qf_lists[idx].qf_count;
2123     }
2124     vim_free(qi->qf_lists[idx].qf_title);
2125     qi->qf_lists[idx].qf_title = NULL;
2126 }
2127 
2128 /*
2129  * qf_mark_adjust: adjust marks
2130  */
2131    void
2132 qf_mark_adjust(wp, line1, line2, amount, amount_after)
2133     win_T	*wp;
2134     linenr_T	line1;
2135     linenr_T	line2;
2136     long	amount;
2137     long	amount_after;
2138 {
2139     int		i;
2140     qfline_T	*qfp;
2141     int		idx;
2142     qf_info_T	*qi = &ql_info;
2143 
2144     if (wp != NULL)
2145     {
2146 	if (wp->w_llist == NULL)
2147 	    return;
2148 	qi = wp->w_llist;
2149     }
2150 
2151     for (idx = 0; idx < qi->qf_listcount; ++idx)
2152 	if (qi->qf_lists[idx].qf_count)
2153 	    for (i = 0, qfp = qi->qf_lists[idx].qf_start;
2154 		       i < qi->qf_lists[idx].qf_count; ++i, qfp = qfp->qf_next)
2155 		if (qfp->qf_fnum == curbuf->b_fnum)
2156 		{
2157 		    if (qfp->qf_lnum >= line1 && qfp->qf_lnum <= line2)
2158 		    {
2159 			if (amount == MAXLNUM)
2160 			    qfp->qf_cleared = TRUE;
2161 			else
2162 			    qfp->qf_lnum += amount;
2163 		    }
2164 		    else if (amount_after && qfp->qf_lnum > line2)
2165 			qfp->qf_lnum += amount_after;
2166 		}
2167 }
2168 
2169 /*
2170  * Make a nice message out of the error character and the error number:
2171  *  char    number	message
2172  *  e or E    0		" error"
2173  *  w or W    0		" warning"
2174  *  i or I    0		" info"
2175  *  0	      0		""
2176  *  other     0		" c"
2177  *  e or E    n		" error n"
2178  *  w or W    n		" warning n"
2179  *  i or I    n		" info n"
2180  *  0	      n		" error n"
2181  *  other     n		" c n"
2182  *  1	      x		""	:helpgrep
2183  */
2184     static char_u *
2185 qf_types(c, nr)
2186     int c, nr;
2187 {
2188     static char_u	buf[20];
2189     static char_u	cc[3];
2190     char_u		*p;
2191 
2192     if (c == 'W' || c == 'w')
2193 	p = (char_u *)" warning";
2194     else if (c == 'I' || c == 'i')
2195 	p = (char_u *)" info";
2196     else if (c == 'E' || c == 'e' || (c == 0 && nr > 0))
2197 	p = (char_u *)" error";
2198     else if (c == 0 || c == 1)
2199 	p = (char_u *)"";
2200     else
2201     {
2202 	cc[0] = ' ';
2203 	cc[1] = c;
2204 	cc[2] = NUL;
2205 	p = cc;
2206     }
2207 
2208     if (nr <= 0)
2209 	return p;
2210 
2211     sprintf((char *)buf, "%s %3d", (char *)p, nr);
2212     return buf;
2213 }
2214 
2215 #if defined(FEAT_WINDOWS) || defined(PROTO)
2216 /*
2217  * ":cwindow": open the quickfix window if we have errors to display,
2218  *	       close it if not.
2219  * ":lwindow": open the location list window if we have locations to display,
2220  *	       close it if not.
2221  */
2222     void
2223 ex_cwindow(eap)
2224     exarg_T	*eap;
2225 {
2226     qf_info_T	*qi = &ql_info;
2227     win_T	*win;
2228 
2229     if (eap->cmdidx == CMD_lwindow)
2230     {
2231 	qi = GET_LOC_LIST(curwin);
2232 	if (qi == NULL)
2233 	    return;
2234     }
2235 
2236     /* Look for an existing quickfix window.  */
2237     win = qf_find_win(qi);
2238 
2239     /*
2240      * If a quickfix window is open but we have no errors to display,
2241      * close the window.  If a quickfix window is not open, then open
2242      * it if we have errors; otherwise, leave it closed.
2243      */
2244     if (qi->qf_lists[qi->qf_curlist].qf_nonevalid
2245 	    || qi->qf_lists[qi->qf_curlist].qf_count == 0
2246 	    || qi->qf_curlist >= qi->qf_listcount)
2247     {
2248 	if (win != NULL)
2249 	    ex_cclose(eap);
2250     }
2251     else if (win == NULL)
2252 	ex_copen(eap);
2253 }
2254 
2255 /*
2256  * ":cclose": close the window showing the list of errors.
2257  * ":lclose": close the window showing the location list
2258  */
2259     void
2260 ex_cclose(eap)
2261     exarg_T	*eap;
2262 {
2263     win_T	*win = NULL;
2264     qf_info_T	*qi = &ql_info;
2265 
2266     if (eap->cmdidx == CMD_lclose || eap->cmdidx == CMD_lwindow)
2267     {
2268 	qi = GET_LOC_LIST(curwin);
2269 	if (qi == NULL)
2270 	    return;
2271     }
2272 
2273     /* Find existing quickfix window and close it. */
2274     win = qf_find_win(qi);
2275     if (win != NULL)
2276 	win_close(win, FALSE);
2277 }
2278 
2279 /*
2280  * ":copen": open a window that shows the list of errors.
2281  * ":lopen": open a window that shows the location list.
2282  */
2283     void
2284 ex_copen(eap)
2285     exarg_T	*eap;
2286 {
2287     qf_info_T	*qi = &ql_info;
2288     int		height;
2289     win_T	*win;
2290     tabpage_T	*prevtab = curtab;
2291     buf_T	*qf_buf;
2292     win_T	*oldwin = curwin;
2293 
2294     if (eap->cmdidx == CMD_lopen || eap->cmdidx == CMD_lwindow)
2295     {
2296 	qi = GET_LOC_LIST(curwin);
2297 	if (qi == NULL)
2298 	{
2299 	    EMSG(_(e_loclist));
2300 	    return;
2301 	}
2302     }
2303 
2304     if (eap->addr_count != 0)
2305 	height = eap->line2;
2306     else
2307 	height = QF_WINHEIGHT;
2308 
2309 #ifdef FEAT_VISUAL
2310     reset_VIsual_and_resel();			/* stop Visual mode */
2311 #endif
2312 #ifdef FEAT_GUI
2313     need_mouse_correct = TRUE;
2314 #endif
2315 
2316     /*
2317      * Find existing quickfix window, or open a new one.
2318      */
2319     win = qf_find_win(qi);
2320 
2321     if (win != NULL && cmdmod.tab == 0)
2322 	win_goto(win);
2323     else
2324     {
2325 	qf_buf = qf_find_buf(qi);
2326 
2327 	/* The current window becomes the previous window afterwards. */
2328 	win = curwin;
2329 
2330 	if (eap->cmdidx == CMD_copen || eap->cmdidx == CMD_cwindow)
2331 	    /* Create the new window at the very bottom. */
2332 	    win_goto(lastwin);
2333 	if (win_split(height, WSP_BELOW | WSP_NEWLOC) == FAIL)
2334 	    return;		/* not enough room for window */
2335 	RESET_BINDING(curwin);
2336 
2337 	if (eap->cmdidx == CMD_lopen || eap->cmdidx == CMD_lwindow)
2338 	{
2339 	    /*
2340 	     * For the location list window, create a reference to the
2341 	     * location list from the window 'win'.
2342 	     */
2343 	    curwin->w_llist_ref = win->w_llist;
2344 	    win->w_llist->qf_refcount++;
2345 	}
2346 
2347 	if (oldwin != curwin)
2348 	    oldwin = NULL;  /* don't store info when in another window */
2349 	if (qf_buf != NULL)
2350 	    /* Use the existing quickfix buffer */
2351 	    (void)do_ecmd(qf_buf->b_fnum, NULL, NULL, NULL, ECMD_ONE,
2352 					     ECMD_HIDE + ECMD_OLDBUF, oldwin);
2353 	else
2354 	{
2355 	    /* Create a new quickfix buffer */
2356 	    (void)do_ecmd(0, NULL, NULL, NULL, ECMD_ONE, ECMD_HIDE, oldwin);
2357 	    /* switch off 'swapfile' */
2358 	    set_option_value((char_u *)"swf", 0L, NULL, OPT_LOCAL);
2359 	    set_option_value((char_u *)"bt", 0L, (char_u *)"quickfix",
2360 								   OPT_LOCAL);
2361 	    set_option_value((char_u *)"bh", 0L, (char_u *)"wipe", OPT_LOCAL);
2362 	    RESET_BINDING(curwin);
2363 #ifdef FEAT_DIFF
2364 	    curwin->w_p_diff = FALSE;
2365 #endif
2366 #ifdef FEAT_FOLDING
2367 	    set_option_value((char_u *)"fdm", 0L, (char_u *)"manual",
2368 								   OPT_LOCAL);
2369 #endif
2370 	}
2371 
2372 	/* Only set the height when still in the same tab page and there is no
2373 	 * window to the side. */
2374 	if (curtab == prevtab
2375 #ifdef FEAT_VERTSPLIT
2376 		&& curwin->w_width == Columns
2377 #endif
2378 	   )
2379 	    win_setheight(height);
2380 	curwin->w_p_wfh = TRUE;	    /* set 'winfixheight' */
2381 	if (win_valid(win))
2382 	    prevwin = win;
2383     }
2384 
2385     /*
2386      * Fill the buffer with the quickfix list.
2387      */
2388     qf_fill_buffer(qi);
2389 
2390     if (qi->qf_lists[qi->qf_curlist].qf_title != NULL)
2391 	qf_set_title(qi);
2392 
2393     curwin->w_cursor.lnum = qi->qf_lists[qi->qf_curlist].qf_index;
2394     curwin->w_cursor.col = 0;
2395     check_cursor();
2396     update_topline();		/* scroll to show the line */
2397 }
2398 
2399 /*
2400  * Return the number of the current entry (line number in the quickfix
2401  * window).
2402  */
2403      linenr_T
2404 qf_current_entry(wp)
2405     win_T	*wp;
2406 {
2407     qf_info_T	*qi = &ql_info;
2408 
2409     if (IS_LL_WINDOW(wp))
2410 	/* In the location list window, use the referenced location list */
2411 	qi = wp->w_llist_ref;
2412 
2413     return qi->qf_lists[qi->qf_curlist].qf_index;
2414 }
2415 
2416 /*
2417  * Update the cursor position in the quickfix window to the current error.
2418  * Return TRUE if there is a quickfix window.
2419  */
2420     static int
2421 qf_win_pos_update(qi, old_qf_index)
2422     qf_info_T	*qi;
2423     int		old_qf_index;	/* previous qf_index or zero */
2424 {
2425     win_T	*win;
2426     int		qf_index = qi->qf_lists[qi->qf_curlist].qf_index;
2427 
2428     /*
2429      * Put the cursor on the current error in the quickfix window, so that
2430      * it's viewable.
2431      */
2432     win = qf_find_win(qi);
2433     if (win != NULL
2434 	    && qf_index <= win->w_buffer->b_ml.ml_line_count
2435 	    && old_qf_index != qf_index)
2436     {
2437 	win_T	*old_curwin = curwin;
2438 
2439 	curwin = win;
2440 	curbuf = win->w_buffer;
2441 	if (qf_index > old_qf_index)
2442 	{
2443 	    curwin->w_redraw_top = old_qf_index;
2444 	    curwin->w_redraw_bot = qf_index;
2445 	}
2446 	else
2447 	{
2448 	    curwin->w_redraw_top = qf_index;
2449 	    curwin->w_redraw_bot = old_qf_index;
2450 	}
2451 	curwin->w_cursor.lnum = qf_index;
2452 	curwin->w_cursor.col = 0;
2453 	update_topline();		/* scroll to show the line */
2454 	redraw_later(VALID);
2455 	curwin->w_redr_status = TRUE;	/* update ruler */
2456 	curwin = old_curwin;
2457 	curbuf = curwin->w_buffer;
2458     }
2459     return win != NULL;
2460 }
2461 
2462 /*
2463  * Check whether the given window is displaying the specified quickfix/location
2464  * list buffer
2465  */
2466     static int
2467 is_qf_win(win, qi)
2468     win_T	*win;
2469     qf_info_T	*qi;
2470 {
2471     /*
2472      * A window displaying the quickfix buffer will have the w_llist_ref field
2473      * set to NULL.
2474      * A window displaying a location list buffer will have the w_llist_ref
2475      * pointing to the location list.
2476      */
2477     if (bt_quickfix(win->w_buffer))
2478 	if ((qi == &ql_info && win->w_llist_ref == NULL)
2479 		|| (qi != &ql_info && win->w_llist_ref == qi))
2480 	    return TRUE;
2481 
2482     return FALSE;
2483 }
2484 
2485 /*
2486  * Find a window displaying the quickfix/location list 'qi'
2487  * Searches in only the windows opened in the current tab.
2488  */
2489     static win_T *
2490 qf_find_win(qi)
2491     qf_info_T	*qi;
2492 {
2493     win_T	*win;
2494 
2495     FOR_ALL_WINDOWS(win)
2496 	if (is_qf_win(win, qi))
2497 	    break;
2498 
2499     return win;
2500 }
2501 
2502 /*
2503  * Find a quickfix buffer.
2504  * Searches in windows opened in all the tabs.
2505  */
2506     static buf_T *
2507 qf_find_buf(qi)
2508     qf_info_T	*qi;
2509 {
2510     tabpage_T	*tp;
2511     win_T	*win;
2512 
2513     FOR_ALL_TAB_WINDOWS(tp, win)
2514 	if (is_qf_win(win, qi))
2515 	    return win->w_buffer;
2516 
2517     return NULL;
2518 }
2519 
2520 /*
2521  * Find the quickfix buffer.  If it exists, update the contents.
2522  */
2523     static void
2524 qf_update_buffer(qi)
2525     qf_info_T	*qi;
2526 {
2527     buf_T	*buf;
2528     win_T	*win;
2529     win_T	*curwin_save;
2530     aco_save_T	aco;
2531 
2532     /* Check if a buffer for the quickfix list exists.  Update it. */
2533     buf = qf_find_buf(qi);
2534     if (buf != NULL)
2535     {
2536 	/* set curwin/curbuf to buf and save a few things */
2537 	aucmd_prepbuf(&aco, buf);
2538 
2539 	qf_fill_buffer(qi);
2540 
2541 	if (qi->qf_lists[qi->qf_curlist].qf_title != NULL
2542 	    && (win = qf_find_win(qi)) != NULL)
2543 	{
2544 	    curwin_save = curwin;
2545 	    curwin = win;
2546 	    qf_set_title(qi);
2547 	    curwin = curwin_save;
2548 
2549 	}
2550 
2551 	/* restore curwin/curbuf and a few other things */
2552 	aucmd_restbuf(&aco);
2553 
2554 	(void)qf_win_pos_update(qi, 0);
2555     }
2556 }
2557 
2558     static void
2559 qf_set_title(qi)
2560     qf_info_T	*qi;
2561 {
2562     set_internal_string_var((char_u *)"w:quickfix_title",
2563 				    qi->qf_lists[qi->qf_curlist].qf_title);
2564 }
2565 
2566 /*
2567  * Fill current buffer with quickfix errors, replacing any previous contents.
2568  * curbuf must be the quickfix buffer!
2569  */
2570     static void
2571 qf_fill_buffer(qi)
2572     qf_info_T	*qi;
2573 {
2574     linenr_T	lnum;
2575     qfline_T	*qfp;
2576     buf_T	*errbuf;
2577     int		len;
2578     int		old_KeyTyped = KeyTyped;
2579 
2580     /* delete all existing lines */
2581     while ((curbuf->b_ml.ml_flags & ML_EMPTY) == 0)
2582 	(void)ml_delete((linenr_T)1, FALSE);
2583 
2584     /* Check if there is anything to display */
2585     if (qi->qf_curlist < qi->qf_listcount)
2586     {
2587 	/* Add one line for each error */
2588 	qfp = qi->qf_lists[qi->qf_curlist].qf_start;
2589 	for (lnum = 0; lnum < qi->qf_lists[qi->qf_curlist].qf_count; ++lnum)
2590 	{
2591 	    if (qfp->qf_fnum != 0
2592 		    && (errbuf = buflist_findnr(qfp->qf_fnum)) != NULL
2593 		    && errbuf->b_fname != NULL)
2594 	    {
2595 		if (qfp->qf_type == 1)	/* :helpgrep */
2596 		    STRCPY(IObuff, gettail(errbuf->b_fname));
2597 		else
2598 		    STRCPY(IObuff, errbuf->b_fname);
2599 		len = (int)STRLEN(IObuff);
2600 	    }
2601 	    else
2602 		len = 0;
2603 	    IObuff[len++] = '|';
2604 
2605 	    if (qfp->qf_lnum > 0)
2606 	    {
2607 		sprintf((char *)IObuff + len, "%ld", qfp->qf_lnum);
2608 		len += (int)STRLEN(IObuff + len);
2609 
2610 		if (qfp->qf_col > 0)
2611 		{
2612 		    sprintf((char *)IObuff + len, " col %d", qfp->qf_col);
2613 		    len += (int)STRLEN(IObuff + len);
2614 		}
2615 
2616 		sprintf((char *)IObuff + len, "%s",
2617 				  (char *)qf_types(qfp->qf_type, qfp->qf_nr));
2618 		len += (int)STRLEN(IObuff + len);
2619 	    }
2620 	    else if (qfp->qf_pattern != NULL)
2621 	    {
2622 		qf_fmt_text(qfp->qf_pattern, IObuff + len, IOSIZE - len);
2623 		len += (int)STRLEN(IObuff + len);
2624 	    }
2625 	    IObuff[len++] = '|';
2626 	    IObuff[len++] = ' ';
2627 
2628 	    /* Remove newlines and leading whitespace from the text.
2629 	     * For an unrecognized line keep the indent, the compiler may
2630 	     * mark a word with ^^^^. */
2631 	    qf_fmt_text(len > 3 ? skipwhite(qfp->qf_text) : qfp->qf_text,
2632 						  IObuff + len, IOSIZE - len);
2633 
2634 	    if (ml_append(lnum, IObuff, (colnr_T)STRLEN(IObuff) + 1, FALSE)
2635 								      == FAIL)
2636 		break;
2637 	    qfp = qfp->qf_next;
2638 	}
2639 	/* Delete the empty line which is now at the end */
2640 	(void)ml_delete(lnum + 1, FALSE);
2641     }
2642 
2643     /* correct cursor position */
2644     check_lnums(TRUE);
2645 
2646     /* Set the 'filetype' to "qf" each time after filling the buffer.  This
2647      * resembles reading a file into a buffer, it's more logical when using
2648      * autocommands. */
2649     set_option_value((char_u *)"ft", 0L, (char_u *)"qf", OPT_LOCAL);
2650     curbuf->b_p_ma = FALSE;
2651 
2652 #ifdef FEAT_AUTOCMD
2653     keep_filetype = TRUE;		/* don't detect 'filetype' */
2654     apply_autocmds(EVENT_BUFREADPOST, (char_u *)"quickfix", NULL,
2655 							       FALSE, curbuf);
2656     apply_autocmds(EVENT_BUFWINENTER, (char_u *)"quickfix", NULL,
2657 							       FALSE, curbuf);
2658     keep_filetype = FALSE;
2659 #endif
2660 
2661     /* make sure it will be redrawn */
2662     redraw_curbuf_later(NOT_VALID);
2663 
2664     /* Restore KeyTyped, setting 'filetype' may reset it. */
2665     KeyTyped = old_KeyTyped;
2666 }
2667 
2668 #endif /* FEAT_WINDOWS */
2669 
2670 /*
2671  * Return TRUE if "buf" is the quickfix buffer.
2672  */
2673     int
2674 bt_quickfix(buf)
2675     buf_T	*buf;
2676 {
2677     return buf != NULL && buf->b_p_bt[0] == 'q';
2678 }
2679 
2680 /*
2681  * Return TRUE if "buf" is a "nofile" or "acwrite" buffer.
2682  * This means the buffer name is not a file name.
2683  */
2684     int
2685 bt_nofile(buf)
2686     buf_T	*buf;
2687 {
2688     return buf != NULL && ((buf->b_p_bt[0] == 'n' && buf->b_p_bt[2] == 'f')
2689 	    || buf->b_p_bt[0] == 'a');
2690 }
2691 
2692 /*
2693  * Return TRUE if "buf" is a "nowrite" or "nofile" buffer.
2694  */
2695     int
2696 bt_dontwrite(buf)
2697     buf_T	*buf;
2698 {
2699     return buf != NULL && buf->b_p_bt[0] == 'n';
2700 }
2701 
2702     int
2703 bt_dontwrite_msg(buf)
2704     buf_T	*buf;
2705 {
2706     if (bt_dontwrite(buf))
2707     {
2708 	EMSG(_("E382: Cannot write, 'buftype' option is set"));
2709 	return TRUE;
2710     }
2711     return FALSE;
2712 }
2713 
2714 /*
2715  * Return TRUE if the buffer should be hidden, according to 'hidden', ":hide"
2716  * and 'bufhidden'.
2717  */
2718     int
2719 buf_hide(buf)
2720     buf_T	*buf;
2721 {
2722     /* 'bufhidden' overrules 'hidden' and ":hide", check it first */
2723     switch (buf->b_p_bh[0])
2724     {
2725 	case 'u':		    /* "unload" */
2726 	case 'w':		    /* "wipe" */
2727 	case 'd': return FALSE;	    /* "delete" */
2728 	case 'h': return TRUE;	    /* "hide" */
2729     }
2730     return (p_hid || cmdmod.hide);
2731 }
2732 
2733 /*
2734  * Return TRUE when using ":vimgrep" for ":grep".
2735  */
2736     int
2737 grep_internal(cmdidx)
2738     cmdidx_T	cmdidx;
2739 {
2740     return ((cmdidx == CMD_grep
2741 		|| cmdidx == CMD_lgrep
2742 		|| cmdidx == CMD_grepadd
2743 		|| cmdidx == CMD_lgrepadd)
2744 	    && STRCMP("internal",
2745 			*curbuf->b_p_gp == NUL ? p_gp : curbuf->b_p_gp) == 0);
2746 }
2747 
2748 /*
2749  * Used for ":make", ":lmake", ":grep", ":lgrep", ":grepadd", and ":lgrepadd"
2750  */
2751     void
2752 ex_make(eap)
2753     exarg_T	*eap;
2754 {
2755     char_u	*fname;
2756     char_u	*cmd;
2757     unsigned	len;
2758     win_T	*wp = NULL;
2759     qf_info_T	*qi = &ql_info;
2760     int		res;
2761 #ifdef FEAT_AUTOCMD
2762     char_u	*au_name = NULL;
2763 
2764     /* Redirect ":grep" to ":vimgrep" if 'grepprg' is "internal". */
2765     if (grep_internal(eap->cmdidx))
2766     {
2767 	ex_vimgrep(eap);
2768 	return;
2769     }
2770 
2771     switch (eap->cmdidx)
2772     {
2773 	case CMD_make:	    au_name = (char_u *)"make"; break;
2774 	case CMD_lmake:	    au_name = (char_u *)"lmake"; break;
2775 	case CMD_grep:	    au_name = (char_u *)"grep"; break;
2776 	case CMD_lgrep:	    au_name = (char_u *)"lgrep"; break;
2777 	case CMD_grepadd:   au_name = (char_u *)"grepadd"; break;
2778 	case CMD_lgrepadd:  au_name = (char_u *)"lgrepadd"; break;
2779 	default: break;
2780     }
2781     if (au_name != NULL)
2782     {
2783 	apply_autocmds(EVENT_QUICKFIXCMDPRE, au_name,
2784 					       curbuf->b_fname, TRUE, curbuf);
2785 # ifdef FEAT_EVAL
2786 	if (did_throw || force_abort)
2787 	    return;
2788 # endif
2789     }
2790 #endif
2791 
2792     if (eap->cmdidx == CMD_lmake || eap->cmdidx == CMD_lgrep
2793 	|| eap->cmdidx == CMD_lgrepadd)
2794 	wp = curwin;
2795 
2796     autowrite_all();
2797     fname = get_mef_name();
2798     if (fname == NULL)
2799 	return;
2800     mch_remove(fname);	    /* in case it's not unique */
2801 
2802     /*
2803      * If 'shellpipe' empty: don't redirect to 'errorfile'.
2804      */
2805     len = (unsigned)STRLEN(p_shq) * 2 + (unsigned)STRLEN(eap->arg) + 1;
2806     if (*p_sp != NUL)
2807 	len += (unsigned)STRLEN(p_sp) + (unsigned)STRLEN(fname) + 3;
2808     cmd = alloc(len);
2809     if (cmd == NULL)
2810 	return;
2811     sprintf((char *)cmd, "%s%s%s", (char *)p_shq, (char *)eap->arg,
2812 							       (char *)p_shq);
2813     if (*p_sp != NUL)
2814 	append_redir(cmd, len, p_sp, fname);
2815     /*
2816      * Output a newline if there's something else than the :make command that
2817      * was typed (in which case the cursor is in column 0).
2818      */
2819     if (msg_col == 0)
2820 	msg_didout = FALSE;
2821     msg_start();
2822     MSG_PUTS(":!");
2823     msg_outtrans(cmd);		/* show what we are doing */
2824 
2825     /* let the shell know if we are redirecting output or not */
2826     do_shell(cmd, *p_sp != NUL ? SHELL_DOOUT : 0);
2827 
2828 #ifdef AMIGA
2829     out_flush();
2830 		/* read window status report and redraw before message */
2831     (void)char_avail();
2832 #endif
2833 
2834     res = qf_init(wp, fname, (eap->cmdidx != CMD_make
2835 			    && eap->cmdidx != CMD_lmake) ? p_gefm : p_efm,
2836 					   (eap->cmdidx != CMD_grepadd
2837 					    && eap->cmdidx != CMD_lgrepadd),
2838 					   *eap->cmdlinep);
2839     if (wp != NULL)
2840 	qi = GET_LOC_LIST(wp);
2841 #ifdef FEAT_AUTOCMD
2842     if (au_name != NULL)
2843     {
2844 	apply_autocmds(EVENT_QUICKFIXCMDPOST, au_name,
2845 					       curbuf->b_fname, TRUE, curbuf);
2846 	if (qi->qf_curlist < qi->qf_listcount)
2847 	    res = qi->qf_lists[qi->qf_curlist].qf_count;
2848 	else
2849 	    res = 0;
2850     }
2851 #endif
2852     if (res > 0 && !eap->forceit)
2853 	qf_jump(qi, 0, 0, FALSE);		/* display first error */
2854 
2855     mch_remove(fname);
2856     vim_free(fname);
2857     vim_free(cmd);
2858 }
2859 
2860 /*
2861  * Return the name for the errorfile, in allocated memory.
2862  * Find a new unique name when 'makeef' contains "##".
2863  * Returns NULL for error.
2864  */
2865     static char_u *
2866 get_mef_name()
2867 {
2868     char_u	*p;
2869     char_u	*name;
2870     static int	start = -1;
2871     static int	off = 0;
2872 #ifdef HAVE_LSTAT
2873     struct stat	sb;
2874 #endif
2875 
2876     if (*p_mef == NUL)
2877     {
2878 	name = vim_tempname('e');
2879 	if (name == NULL)
2880 	    EMSG(_(e_notmp));
2881 	return name;
2882     }
2883 
2884     for (p = p_mef; *p; ++p)
2885 	if (p[0] == '#' && p[1] == '#')
2886 	    break;
2887 
2888     if (*p == NUL)
2889 	return vim_strsave(p_mef);
2890 
2891     /* Keep trying until the name doesn't exist yet. */
2892     for (;;)
2893     {
2894 	if (start == -1)
2895 	    start = mch_get_pid();
2896 	else
2897 	    off += 19;
2898 
2899 	name = alloc((unsigned)STRLEN(p_mef) + 30);
2900 	if (name == NULL)
2901 	    break;
2902 	STRCPY(name, p_mef);
2903 	sprintf((char *)name + (p - p_mef), "%d%d", start, off);
2904 	STRCAT(name, p + 2);
2905 	if (mch_getperm(name) < 0
2906 #ifdef HAVE_LSTAT
2907 		    /* Don't accept a symbolic link, its a security risk. */
2908 		    && mch_lstat((char *)name, &sb) < 0
2909 #endif
2910 		)
2911 	    break;
2912 	vim_free(name);
2913     }
2914     return name;
2915 }
2916 
2917 /*
2918  * ":cc", ":crewind", ":cfirst" and ":clast".
2919  * ":ll", ":lrewind", ":lfirst" and ":llast".
2920  */
2921     void
2922 ex_cc(eap)
2923     exarg_T	*eap;
2924 {
2925     qf_info_T	*qi = &ql_info;
2926 
2927     if (eap->cmdidx == CMD_ll
2928 	    || eap->cmdidx == CMD_lrewind
2929 	    || eap->cmdidx == CMD_lfirst
2930 	    || eap->cmdidx == CMD_llast)
2931     {
2932 	qi = GET_LOC_LIST(curwin);
2933 	if (qi == NULL)
2934 	{
2935 	    EMSG(_(e_loclist));
2936 	    return;
2937 	}
2938     }
2939 
2940     qf_jump(qi, 0,
2941 	    eap->addr_count > 0
2942 	    ? (int)eap->line2
2943 	    : (eap->cmdidx == CMD_cc || eap->cmdidx == CMD_ll)
2944 		? 0
2945 		: (eap->cmdidx == CMD_crewind || eap->cmdidx == CMD_lrewind
2946 		   || eap->cmdidx == CMD_cfirst || eap->cmdidx == CMD_lfirst)
2947 		    ? 1
2948 		    : 32767,
2949 	    eap->forceit);
2950 }
2951 
2952 /*
2953  * ":cnext", ":cnfile", ":cNext" and ":cprevious".
2954  * ":lnext", ":lNext", ":lprevious", ":lnfile", ":lNfile" and ":lpfile".
2955  */
2956     void
2957 ex_cnext(eap)
2958     exarg_T	*eap;
2959 {
2960     qf_info_T	*qi = &ql_info;
2961 
2962     if (eap->cmdidx == CMD_lnext
2963 	    || eap->cmdidx == CMD_lNext
2964 	    || eap->cmdidx == CMD_lprevious
2965 	    || eap->cmdidx == CMD_lnfile
2966 	    || eap->cmdidx == CMD_lNfile
2967 	    || eap->cmdidx == CMD_lpfile)
2968     {
2969 	qi = GET_LOC_LIST(curwin);
2970 	if (qi == NULL)
2971 	{
2972 	    EMSG(_(e_loclist));
2973 	    return;
2974 	}
2975     }
2976 
2977     qf_jump(qi, (eap->cmdidx == CMD_cnext || eap->cmdidx == CMD_lnext)
2978 	    ? FORWARD
2979 	    : (eap->cmdidx == CMD_cnfile || eap->cmdidx == CMD_lnfile)
2980 		? FORWARD_FILE
2981 		: (eap->cmdidx == CMD_cpfile || eap->cmdidx == CMD_lpfile
2982 		   || eap->cmdidx == CMD_cNfile || eap->cmdidx == CMD_lNfile)
2983 		    ? BACKWARD_FILE
2984 		    : BACKWARD,
2985 	    eap->addr_count > 0 ? (int)eap->line2 : 1, eap->forceit);
2986 }
2987 
2988 /*
2989  * ":cfile"/":cgetfile"/":caddfile" commands.
2990  * ":lfile"/":lgetfile"/":laddfile" commands.
2991  */
2992     void
2993 ex_cfile(eap)
2994     exarg_T	*eap;
2995 {
2996     win_T	*wp = NULL;
2997     qf_info_T	*qi = &ql_info;
2998 #ifdef FEAT_AUTOCMD
2999     char_u	*au_name = NULL;
3000 #endif
3001 
3002     if (eap->cmdidx == CMD_lfile || eap->cmdidx == CMD_lgetfile
3003 					       || eap->cmdidx == CMD_laddfile)
3004 	wp = curwin;
3005 
3006 #ifdef FEAT_AUTOCMD
3007     switch (eap->cmdidx)
3008     {
3009 	case CMD_cfile:	    au_name = (char_u *)"cfile"; break;
3010 	case CMD_cgetfile:  au_name = (char_u *)"cgetfile"; break;
3011 	case CMD_caddfile:  au_name = (char_u *)"caddfile"; break;
3012 	case CMD_lfile:	    au_name = (char_u *)"lfile"; break;
3013 	case CMD_lgetfile:  au_name = (char_u *)"lgetfile"; break;
3014 	case CMD_laddfile:  au_name = (char_u *)"laddfile"; break;
3015 	default: break;
3016     }
3017     if (au_name != NULL)
3018 	apply_autocmds(EVENT_QUICKFIXCMDPRE, au_name, NULL, FALSE, curbuf);
3019 #endif
3020 #ifdef FEAT_BROWSE
3021     if (cmdmod.browse)
3022     {
3023 	char_u *browse_file = do_browse(0, (char_u *)_("Error file"), eap->arg,
3024 				   NULL, NULL, BROWSE_FILTER_ALL_FILES, NULL);
3025 	if (browse_file == NULL)
3026 	    return;
3027 	set_string_option_direct((char_u *)"ef", -1, browse_file, OPT_FREE, 0);
3028 	vim_free(browse_file);
3029     }
3030     else
3031 #endif
3032     if (*eap->arg != NUL)
3033 	set_string_option_direct((char_u *)"ef", -1, eap->arg, OPT_FREE, 0);
3034 
3035     /*
3036      * This function is used by the :cfile, :cgetfile and :caddfile
3037      * commands.
3038      * :cfile always creates a new quickfix list and jumps to the
3039      * first error.
3040      * :cgetfile creates a new quickfix list but doesn't jump to the
3041      * first error.
3042      * :caddfile adds to an existing quickfix list. If there is no
3043      * quickfix list then a new list is created.
3044      */
3045     if (qf_init(wp, p_ef, p_efm, (eap->cmdidx != CMD_caddfile
3046 				  && eap->cmdidx != CMD_laddfile),
3047 							   *eap->cmdlinep) > 0
3048 				  && (eap->cmdidx == CMD_cfile
3049 					     || eap->cmdidx == CMD_lfile))
3050     {
3051 #ifdef FEAT_AUTOCMD
3052 	if (au_name != NULL)
3053 	    apply_autocmds(EVENT_QUICKFIXCMDPOST, au_name, NULL, FALSE, curbuf);
3054 #endif
3055 	if (wp != NULL)
3056 	    qi = GET_LOC_LIST(wp);
3057 	qf_jump(qi, 0, 0, eap->forceit);	/* display first error */
3058     }
3059 
3060     else
3061     {
3062 #ifdef FEAT_AUTOCMD
3063 	if (au_name != NULL)
3064 	    apply_autocmds(EVENT_QUICKFIXCMDPOST, au_name, NULL, FALSE, curbuf);
3065 #endif
3066     }
3067 }
3068 
3069 /*
3070  * ":vimgrep {pattern} file(s)"
3071  * ":vimgrepadd {pattern} file(s)"
3072  * ":lvimgrep {pattern} file(s)"
3073  * ":lvimgrepadd {pattern} file(s)"
3074  */
3075     void
3076 ex_vimgrep(eap)
3077     exarg_T	*eap;
3078 {
3079     regmmatch_T	regmatch;
3080     int		fcount;
3081     char_u	**fnames;
3082     char_u	*fname;
3083     char_u	*s;
3084     char_u	*p;
3085     int		fi;
3086     qf_info_T	*qi = &ql_info;
3087     qfline_T	*prevp = NULL;
3088     long	lnum;
3089     buf_T	*buf;
3090     int		duplicate_name = FALSE;
3091     int		using_dummy;
3092     int		redraw_for_dummy = FALSE;
3093     int		found_match;
3094     buf_T	*first_match_buf = NULL;
3095     time_t	seconds = 0;
3096     int		save_mls;
3097 #if defined(FEAT_AUTOCMD) && defined(FEAT_SYN_HL)
3098     char_u	*save_ei = NULL;
3099 #endif
3100     aco_save_T	aco;
3101     int		flags = 0;
3102     colnr_T	col;
3103     long	tomatch;
3104     char_u	*dirname_start = NULL;
3105     char_u	*dirname_now = NULL;
3106     char_u	*target_dir = NULL;
3107 #ifdef FEAT_AUTOCMD
3108     char_u	*au_name =  NULL;
3109 
3110     switch (eap->cmdidx)
3111     {
3112 	case CMD_vimgrep:     au_name = (char_u *)"vimgrep"; break;
3113 	case CMD_lvimgrep:    au_name = (char_u *)"lvimgrep"; break;
3114 	case CMD_vimgrepadd:  au_name = (char_u *)"vimgrepadd"; break;
3115 	case CMD_lvimgrepadd: au_name = (char_u *)"lvimgrepadd"; break;
3116 	case CMD_grep:	      au_name = (char_u *)"grep"; break;
3117 	case CMD_lgrep:	      au_name = (char_u *)"lgrep"; break;
3118 	case CMD_grepadd:     au_name = (char_u *)"grepadd"; break;
3119 	case CMD_lgrepadd:    au_name = (char_u *)"lgrepadd"; break;
3120 	default: break;
3121     }
3122     if (au_name != NULL)
3123     {
3124 	apply_autocmds(EVENT_QUICKFIXCMDPRE, au_name,
3125 					       curbuf->b_fname, TRUE, curbuf);
3126 	if (did_throw || force_abort)
3127 	    return;
3128     }
3129 #endif
3130 
3131     if (eap->cmdidx == CMD_lgrep
3132 	    || eap->cmdidx == CMD_lvimgrep
3133 	    || eap->cmdidx == CMD_lgrepadd
3134 	    || eap->cmdidx == CMD_lvimgrepadd)
3135     {
3136 	qi = ll_get_or_alloc_list(curwin);
3137 	if (qi == NULL)
3138 	    return;
3139     }
3140 
3141     if (eap->addr_count > 0)
3142 	tomatch = eap->line2;
3143     else
3144 	tomatch = MAXLNUM;
3145 
3146     /* Get the search pattern: either white-separated or enclosed in // */
3147     regmatch.regprog = NULL;
3148     p = skip_vimgrep_pat(eap->arg, &s, &flags);
3149     if (p == NULL)
3150     {
3151 	EMSG(_(e_invalpat));
3152 	goto theend;
3153     }
3154     regmatch.regprog = vim_regcomp(s, RE_MAGIC);
3155     if (regmatch.regprog == NULL)
3156 	goto theend;
3157     regmatch.rmm_ic = p_ic;
3158     regmatch.rmm_maxcol = 0;
3159 
3160     p = skipwhite(p);
3161     if (*p == NUL)
3162     {
3163 	EMSG(_("E683: File name missing or invalid pattern"));
3164 	goto theend;
3165     }
3166 
3167     if ((eap->cmdidx != CMD_grepadd && eap->cmdidx != CMD_lgrepadd &&
3168 	 eap->cmdidx != CMD_vimgrepadd && eap->cmdidx != CMD_lvimgrepadd)
3169 					|| qi->qf_curlist == qi->qf_listcount)
3170 	/* make place for a new list */
3171 	qf_new_list(qi, *eap->cmdlinep);
3172     else if (qi->qf_lists[qi->qf_curlist].qf_count > 0)
3173 	/* Adding to existing list, find last entry. */
3174 	for (prevp = qi->qf_lists[qi->qf_curlist].qf_start;
3175 			    prevp->qf_next != prevp; prevp = prevp->qf_next)
3176 	    ;
3177 
3178     /* parse the list of arguments */
3179     if (get_arglist_exp(p, &fcount, &fnames) == FAIL)
3180 	goto theend;
3181     if (fcount == 0)
3182     {
3183 	EMSG(_(e_nomatch));
3184 	goto theend;
3185     }
3186 
3187     dirname_start = alloc(MAXPATHL);
3188     dirname_now = alloc(MAXPATHL);
3189     if (dirname_start == NULL || dirname_now == NULL)
3190 	goto theend;
3191 
3192     /* Remember the current directory, because a BufRead autocommand that does
3193      * ":lcd %:p:h" changes the meaning of short path names. */
3194     mch_dirname(dirname_start, MAXPATHL);
3195 
3196     seconds = (time_t)0;
3197     for (fi = 0; fi < fcount && !got_int && tomatch > 0; ++fi)
3198     {
3199 	fname = shorten_fname1(fnames[fi]);
3200 	if (time(NULL) > seconds)
3201 	{
3202 	    /* Display the file name every second or so, show the user we are
3203 	     * working on it. */
3204 	    seconds = time(NULL);
3205 	    msg_start();
3206 	    p = msg_strtrunc(fname, TRUE);
3207 	    if (p == NULL)
3208 		msg_outtrans(fname);
3209 	    else
3210 	    {
3211 		msg_outtrans(p);
3212 		vim_free(p);
3213 	    }
3214 	    msg_clr_eos();
3215 	    msg_didout = FALSE;	    /* overwrite this message */
3216 	    msg_nowait = TRUE;	    /* don't wait for this message */
3217 	    msg_col = 0;
3218 	    out_flush();
3219 	}
3220 
3221 	buf = buflist_findname_exp(fnames[fi]);
3222 	if (buf == NULL || buf->b_ml.ml_mfp == NULL)
3223 	{
3224 	    /* Remember that a buffer with this name already exists. */
3225 	    duplicate_name = (buf != NULL);
3226 	    using_dummy = TRUE;
3227 	    redraw_for_dummy = TRUE;
3228 
3229 #if defined(FEAT_AUTOCMD) && defined(FEAT_SYN_HL)
3230 	    /* Don't do Filetype autocommands to avoid loading syntax and
3231 	     * indent scripts, a great speed improvement. */
3232 	    save_ei = au_event_disable(",Filetype");
3233 #endif
3234 	    /* Don't use modelines here, it's useless. */
3235 	    save_mls = p_mls;
3236 	    p_mls = 0;
3237 
3238 	    /* Load file into a buffer, so that 'fileencoding' is detected,
3239 	     * autocommands applied, etc. */
3240 	    buf = load_dummy_buffer(fname);
3241 
3242 	    /* When autocommands changed directory: go back.  We assume it was
3243 	     * ":lcd %:p:h". */
3244 	    mch_dirname(dirname_now, MAXPATHL);
3245 	    if (STRCMP(dirname_start, dirname_now) != 0)
3246 	    {
3247 		exarg_T ea;
3248 
3249 		ea.arg = dirname_start;
3250 		ea.cmdidx = CMD_lcd;
3251 		ex_cd(&ea);
3252 	    }
3253 
3254 	    p_mls = save_mls;
3255 #if defined(FEAT_AUTOCMD) && defined(FEAT_SYN_HL)
3256 	    au_event_restore(save_ei);
3257 #endif
3258 	}
3259 	else
3260 	    /* Use existing, loaded buffer. */
3261 	    using_dummy = FALSE;
3262 
3263 	if (buf == NULL)
3264 	{
3265 	    if (!got_int)
3266 		smsg((char_u *)_("Cannot open file \"%s\""), fname);
3267 	}
3268 	else
3269 	{
3270 	    /* Try for a match in all lines of the buffer.
3271 	     * For ":1vimgrep" look for first match only. */
3272 	    found_match = FALSE;
3273 	    for (lnum = 1; lnum <= buf->b_ml.ml_line_count && tomatch > 0;
3274 								       ++lnum)
3275 	    {
3276 		col = 0;
3277 		while (vim_regexec_multi(&regmatch, curwin, buf, lnum,
3278 							       col, NULL) > 0)
3279 		{
3280 		    ;
3281 		    if (qf_add_entry(qi, &prevp,
3282 				NULL,       /* dir */
3283 				fname,
3284 				0,
3285 				ml_get_buf(buf,
3286 				     regmatch.startpos[0].lnum + lnum, FALSE),
3287 				regmatch.startpos[0].lnum + lnum,
3288 				regmatch.startpos[0].col + 1,
3289 				FALSE,      /* vis_col */
3290 				NULL,	    /* search pattern */
3291 				0,	    /* nr */
3292 				0,	    /* type */
3293 				TRUE	    /* valid */
3294 				) == FAIL)
3295 		    {
3296 			got_int = TRUE;
3297 			break;
3298 		    }
3299 		    found_match = TRUE;
3300 		    if (--tomatch == 0)
3301 			break;
3302 		    if ((flags & VGR_GLOBAL) == 0
3303 					       || regmatch.endpos[0].lnum > 0)
3304 			break;
3305 		    col = regmatch.endpos[0].col
3306 					    + (col == regmatch.endpos[0].col);
3307 		    if (col > (colnr_T)STRLEN(ml_get_buf(buf, lnum, FALSE)))
3308 			break;
3309 		}
3310 		line_breakcheck();
3311 		if (got_int)
3312 		    break;
3313 	    }
3314 
3315 	    if (using_dummy)
3316 	    {
3317 		if (found_match && first_match_buf == NULL)
3318 		    first_match_buf = buf;
3319 		if (duplicate_name)
3320 		{
3321 		    /* Never keep a dummy buffer if there is another buffer
3322 		     * with the same name. */
3323 		    wipe_dummy_buffer(buf);
3324 		    buf = NULL;
3325 		}
3326 		else if (!cmdmod.hide
3327 			    || buf->b_p_bh[0] == 'u'	/* "unload" */
3328 			    || buf->b_p_bh[0] == 'w'	/* "wipe" */
3329 			    || buf->b_p_bh[0] == 'd')	/* "delete" */
3330 		{
3331 		    /* When no match was found we don't need to remember the
3332 		     * buffer, wipe it out.  If there was a match and it
3333 		     * wasn't the first one or we won't jump there: only
3334 		     * unload the buffer.
3335 		     * Ignore 'hidden' here, because it may lead to having too
3336 		     * many swap files. */
3337 		    if (!found_match)
3338 		    {
3339 			wipe_dummy_buffer(buf);
3340 			buf = NULL;
3341 		    }
3342 		    else if (buf != first_match_buf || (flags & VGR_NOJUMP))
3343 		    {
3344 			unload_dummy_buffer(buf);
3345 			buf = NULL;
3346 		    }
3347 		}
3348 
3349 		if (buf != NULL)
3350 		{
3351 		    /* If the buffer is still loaded we need to use the
3352 		     * directory we jumped to below. */
3353 		    if (buf == first_match_buf
3354 			    && target_dir == NULL
3355 			    && STRCMP(dirname_start, dirname_now) != 0)
3356 			target_dir = vim_strsave(dirname_now);
3357 
3358 		    /* The buffer is still loaded, the Filetype autocommands
3359 		     * need to be done now, in that buffer.  And the modelines
3360 		     * need to be done (again).  But not the window-local
3361 		     * options! */
3362 		    aucmd_prepbuf(&aco, buf);
3363 #if defined(FEAT_AUTOCMD) && defined(FEAT_SYN_HL)
3364 		    apply_autocmds(EVENT_FILETYPE, buf->b_p_ft,
3365 						     buf->b_fname, TRUE, buf);
3366 #endif
3367 		    do_modelines(OPT_NOWIN);
3368 		    aucmd_restbuf(&aco);
3369 		}
3370 	    }
3371 	}
3372     }
3373 
3374     FreeWild(fcount, fnames);
3375 
3376     qi->qf_lists[qi->qf_curlist].qf_nonevalid = FALSE;
3377     qi->qf_lists[qi->qf_curlist].qf_ptr = qi->qf_lists[qi->qf_curlist].qf_start;
3378     qi->qf_lists[qi->qf_curlist].qf_index = 1;
3379 
3380 #ifdef FEAT_WINDOWS
3381     qf_update_buffer(qi);
3382 #endif
3383 
3384 #ifdef FEAT_AUTOCMD
3385     if (au_name != NULL)
3386 	apply_autocmds(EVENT_QUICKFIXCMDPOST, au_name,
3387 					       curbuf->b_fname, TRUE, curbuf);
3388 #endif
3389 
3390     /* Jump to first match. */
3391     if (qi->qf_lists[qi->qf_curlist].qf_count > 0)
3392     {
3393 	if ((flags & VGR_NOJUMP) == 0)
3394 	{
3395 	    buf = curbuf;
3396 	    qf_jump(qi, 0, 0, eap->forceit);
3397 	    if (buf != curbuf)
3398 		/* If we jumped to another buffer redrawing will already be
3399 		 * taken care of. */
3400 		redraw_for_dummy = FALSE;
3401 
3402 	    /* Jump to the directory used after loading the buffer. */
3403 	    if (curbuf == first_match_buf && target_dir != NULL)
3404 	    {
3405 		exarg_T ea;
3406 
3407 		ea.arg = target_dir;
3408 		ea.cmdidx = CMD_lcd;
3409 		ex_cd(&ea);
3410 	    }
3411 	}
3412     }
3413     else
3414 	EMSG2(_(e_nomatch2), s);
3415 
3416     /* If we loaded a dummy buffer into the current window, the autocommands
3417      * may have messed up things, need to redraw and recompute folds. */
3418     if (redraw_for_dummy)
3419     {
3420 #ifdef FEAT_FOLDING
3421 	foldUpdateAll(curwin);
3422 #else
3423 	redraw_later(NOT_VALID);
3424 #endif
3425     }
3426 
3427 theend:
3428     vim_free(dirname_now);
3429     vim_free(dirname_start);
3430     vim_free(target_dir);
3431     vim_free(regmatch.regprog);
3432 }
3433 
3434 /*
3435  * Skip over the pattern argument of ":vimgrep /pat/[g][j]".
3436  * Put the start of the pattern in "*s", unless "s" is NULL.
3437  * If "flags" is not NULL put the flags in it: VGR_GLOBAL, VGR_NOJUMP.
3438  * If "s" is not NULL terminate the pattern with a NUL.
3439  * Return a pointer to the char just past the pattern plus flags.
3440  */
3441     char_u *
3442 skip_vimgrep_pat(p, s, flags)
3443     char_u  *p;
3444     char_u  **s;
3445     int	    *flags;
3446 {
3447     int		c;
3448 
3449     if (vim_isIDc(*p))
3450     {
3451 	/* ":vimgrep pattern fname" */
3452 	if (s != NULL)
3453 	    *s = p;
3454 	p = skiptowhite(p);
3455 	if (s != NULL && *p != NUL)
3456 	    *p++ = NUL;
3457     }
3458     else
3459     {
3460 	/* ":vimgrep /pattern/[g][j] fname" */
3461 	if (s != NULL)
3462 	    *s = p + 1;
3463 	c = *p;
3464 	p = skip_regexp(p + 1, c, TRUE, NULL);
3465 	if (*p != c)
3466 	    return NULL;
3467 
3468 	/* Truncate the pattern. */
3469 	if (s != NULL)
3470 	    *p = NUL;
3471 	++p;
3472 
3473 	/* Find the flags */
3474 	while (*p == 'g' || *p == 'j')
3475 	{
3476 	    if (flags != NULL)
3477 	    {
3478 		if (*p == 'g')
3479 		    *flags |= VGR_GLOBAL;
3480 		else
3481 		    *flags |= VGR_NOJUMP;
3482 	    }
3483 	    ++p;
3484 	}
3485     }
3486     return p;
3487 }
3488 
3489 /*
3490  * Load file "fname" into a dummy buffer and return the buffer pointer.
3491  * Returns NULL if it fails.
3492  * Must call unload_dummy_buffer() or wipe_dummy_buffer() later!
3493  */
3494     static buf_T *
3495 load_dummy_buffer(fname)
3496     char_u	*fname;
3497 {
3498     buf_T	*newbuf;
3499     buf_T	*newbuf_to_wipe = NULL;
3500     int		failed = TRUE;
3501     aco_save_T	aco;
3502 
3503     /* Allocate a buffer without putting it in the buffer list. */
3504     newbuf = buflist_new(NULL, NULL, (linenr_T)1, BLN_DUMMY);
3505     if (newbuf == NULL)
3506 	return NULL;
3507 
3508     /* Init the options. */
3509     buf_copy_options(newbuf, BCO_ENTER | BCO_NOHELP);
3510 
3511     /* need to open the memfile before putting the buffer in a window */
3512     if (ml_open(newbuf) == OK)
3513     {
3514 	/* set curwin/curbuf to buf and save a few things */
3515 	aucmd_prepbuf(&aco, newbuf);
3516 
3517 	/* Need to set the filename for autocommands. */
3518 	(void)setfname(curbuf, fname, NULL, FALSE);
3519 
3520 	/* Create swap file now to avoid the ATTENTION message. */
3521 	check_need_swap(TRUE);
3522 
3523 	/* Remove the "dummy" flag, otherwise autocommands may not
3524 	 * work. */
3525 	curbuf->b_flags &= ~BF_DUMMY;
3526 
3527 	if (readfile(fname, NULL,
3528 		    (linenr_T)0, (linenr_T)0, (linenr_T)MAXLNUM,
3529 		    NULL, READ_NEW | READ_DUMMY) == OK
3530 		&& !got_int
3531 		&& !(curbuf->b_flags & BF_NEW))
3532 	{
3533 	    failed = FALSE;
3534 	    if (curbuf != newbuf)
3535 	    {
3536 		/* Bloody autocommands changed the buffer!  Can happen when
3537 		 * using netrw and editing a remote file.  Use the current
3538 		 * buffer instead, delete the dummy one after restoring the
3539 		 * window stuff. */
3540 		newbuf_to_wipe = newbuf;
3541 		newbuf = curbuf;
3542 	    }
3543 	}
3544 
3545 	/* restore curwin/curbuf and a few other things */
3546 	aucmd_restbuf(&aco);
3547 	if (newbuf_to_wipe != NULL && buf_valid(newbuf_to_wipe))
3548 	    wipe_buffer(newbuf_to_wipe, FALSE);
3549     }
3550 
3551     if (!buf_valid(newbuf))
3552 	return NULL;
3553     if (failed)
3554     {
3555 	wipe_dummy_buffer(newbuf);
3556 	return NULL;
3557     }
3558     return newbuf;
3559 }
3560 
3561 /*
3562  * Wipe out the dummy buffer that load_dummy_buffer() created.
3563  */
3564     static void
3565 wipe_dummy_buffer(buf)
3566     buf_T	*buf;
3567 {
3568     if (curbuf != buf)		/* safety check */
3569     {
3570 #if defined(FEAT_AUTOCMD) && defined(FEAT_EVAL)
3571 	cleanup_T   cs;
3572 
3573 	/* Reset the error/interrupt/exception state here so that aborting()
3574 	 * returns FALSE when wiping out the buffer.  Otherwise it doesn't
3575 	 * work when got_int is set. */
3576 	enter_cleanup(&cs);
3577 #endif
3578 
3579 	wipe_buffer(buf, FALSE);
3580 
3581 #if defined(FEAT_AUTOCMD) && defined(FEAT_EVAL)
3582 	/* Restore the error/interrupt/exception state if not discarded by a
3583 	 * new aborting error, interrupt, or uncaught exception. */
3584 	leave_cleanup(&cs);
3585 #endif
3586     }
3587 }
3588 
3589 /*
3590  * Unload the dummy buffer that load_dummy_buffer() created.
3591  */
3592     static void
3593 unload_dummy_buffer(buf)
3594     buf_T	*buf;
3595 {
3596     if (curbuf != buf)		/* safety check */
3597 	close_buffer(NULL, buf, DOBUF_UNLOAD, FALSE);
3598 }
3599 
3600 #if defined(FEAT_EVAL) || defined(PROTO)
3601 /*
3602  * Add each quickfix error to list "list" as a dictionary.
3603  */
3604     int
3605 get_errorlist(wp, list)
3606     win_T	*wp;
3607     list_T	*list;
3608 {
3609     qf_info_T	*qi = &ql_info;
3610     dict_T	*dict;
3611     char_u	buf[2];
3612     qfline_T	*qfp;
3613     int		i;
3614     int		bufnum;
3615 
3616     if (wp != NULL)
3617     {
3618 	qi = GET_LOC_LIST(wp);
3619 	if (qi == NULL)
3620 	    return FAIL;
3621     }
3622 
3623     if (qi->qf_curlist >= qi->qf_listcount
3624 	    || qi->qf_lists[qi->qf_curlist].qf_count == 0)
3625 	return FAIL;
3626 
3627     qfp = qi->qf_lists[qi->qf_curlist].qf_start;
3628     for (i = 1; !got_int && i <= qi->qf_lists[qi->qf_curlist].qf_count; ++i)
3629     {
3630 	/* Handle entries with a non-existing buffer number. */
3631 	bufnum = qfp->qf_fnum;
3632 	if (bufnum != 0 && (buflist_findnr(bufnum) == NULL))
3633 	    bufnum = 0;
3634 
3635 	if ((dict = dict_alloc()) == NULL)
3636 	    return FAIL;
3637 	if (list_append_dict(list, dict) == FAIL)
3638 	    return FAIL;
3639 
3640 	buf[0] = qfp->qf_type;
3641 	buf[1] = NUL;
3642 	if ( dict_add_nr_str(dict, "bufnr", (long)bufnum, NULL) == FAIL
3643 	  || dict_add_nr_str(dict, "lnum",  (long)qfp->qf_lnum, NULL) == FAIL
3644 	  || dict_add_nr_str(dict, "col",   (long)qfp->qf_col, NULL) == FAIL
3645 	  || dict_add_nr_str(dict, "vcol",  (long)qfp->qf_viscol, NULL) == FAIL
3646 	  || dict_add_nr_str(dict, "nr",    (long)qfp->qf_nr, NULL) == FAIL
3647 	  || dict_add_nr_str(dict, "pattern",  0L,
3648 	     qfp->qf_pattern == NULL ? (char_u *)"" : qfp->qf_pattern) == FAIL
3649 	  || dict_add_nr_str(dict, "text",  0L,
3650 		   qfp->qf_text == NULL ? (char_u *)"" : qfp->qf_text) == FAIL
3651 	  || dict_add_nr_str(dict, "type",  0L, buf) == FAIL
3652 	  || dict_add_nr_str(dict, "valid", (long)qfp->qf_valid, NULL) == FAIL)
3653 	    return FAIL;
3654 
3655 	qfp = qfp->qf_next;
3656     }
3657     return OK;
3658 }
3659 
3660 /*
3661  * Populate the quickfix list with the items supplied in the list
3662  * of dictionaries. "title" will be copied to w:quickfix_title
3663  */
3664     int
3665 set_errorlist(wp, list, action, title)
3666     win_T	*wp;
3667     list_T	*list;
3668     int		action;
3669     char_u	*title;
3670 {
3671     listitem_T	*li;
3672     dict_T	*d;
3673     char_u	*filename, *pattern, *text, *type;
3674     int		bufnum;
3675     long	lnum;
3676     int		col, nr;
3677     int		vcol;
3678     qfline_T	*prevp = NULL;
3679     int		valid, status;
3680     int		retval = OK;
3681     qf_info_T	*qi = &ql_info;
3682     int		did_bufnr_emsg = FALSE;
3683 
3684     if (wp != NULL)
3685     {
3686 	qi = ll_get_or_alloc_list(wp);
3687 	if (qi == NULL)
3688 	    return FAIL;
3689     }
3690 
3691     if (action == ' ' || qi->qf_curlist == qi->qf_listcount)
3692 	/* make place for a new list */
3693 	qf_new_list(qi, title);
3694     else if (action == 'a' && qi->qf_lists[qi->qf_curlist].qf_count > 0)
3695 	/* Adding to existing list, find last entry. */
3696 	for (prevp = qi->qf_lists[qi->qf_curlist].qf_start;
3697 	     prevp->qf_next != prevp; prevp = prevp->qf_next)
3698 	    ;
3699     else if (action == 'r')
3700 	qf_free(qi, qi->qf_curlist);
3701 
3702     for (li = list->lv_first; li != NULL; li = li->li_next)
3703     {
3704 	if (li->li_tv.v_type != VAR_DICT)
3705 	    continue; /* Skip non-dict items */
3706 
3707 	d = li->li_tv.vval.v_dict;
3708 	if (d == NULL)
3709 	    continue;
3710 
3711 	filename = get_dict_string(d, (char_u *)"filename", TRUE);
3712 	bufnum = get_dict_number(d, (char_u *)"bufnr");
3713 	lnum = get_dict_number(d, (char_u *)"lnum");
3714 	col = get_dict_number(d, (char_u *)"col");
3715 	vcol = get_dict_number(d, (char_u *)"vcol");
3716 	nr = get_dict_number(d, (char_u *)"nr");
3717 	type = get_dict_string(d, (char_u *)"type", TRUE);
3718 	pattern = get_dict_string(d, (char_u *)"pattern", TRUE);
3719 	text = get_dict_string(d, (char_u *)"text", TRUE);
3720 	if (text == NULL)
3721 	    text = vim_strsave((char_u *)"");
3722 
3723 	valid = TRUE;
3724 	if ((filename == NULL && bufnum == 0) || (lnum == 0 && pattern == NULL))
3725 	    valid = FALSE;
3726 
3727 	/* Mark entries with non-existing buffer number as not valid. Give the
3728 	 * error message only once. */
3729 	if (bufnum != 0 && (buflist_findnr(bufnum) == NULL))
3730 	{
3731 	    if (!did_bufnr_emsg)
3732 	    {
3733 		did_bufnr_emsg = TRUE;
3734 		EMSGN(_("E92: Buffer %ld not found"), bufnum);
3735 	    }
3736 	    valid = FALSE;
3737 	    bufnum = 0;
3738 	}
3739 
3740 	status =  qf_add_entry(qi, &prevp,
3741 			       NULL,	    /* dir */
3742 			       filename,
3743 			       bufnum,
3744 			       text,
3745 			       lnum,
3746 			       col,
3747 			       vcol,	    /* vis_col */
3748 			       pattern,	    /* search pattern */
3749 			       nr,
3750 			       type == NULL ? NUL : *type,
3751 			       valid);
3752 
3753 	vim_free(filename);
3754 	vim_free(pattern);
3755 	vim_free(text);
3756 	vim_free(type);
3757 
3758 	if (status == FAIL)
3759 	{
3760 	    retval = FAIL;
3761 	    break;
3762 	}
3763     }
3764 
3765     if (qi->qf_lists[qi->qf_curlist].qf_index == 0)
3766 	/* no valid entry */
3767 	qi->qf_lists[qi->qf_curlist].qf_nonevalid = TRUE;
3768     else
3769 	qi->qf_lists[qi->qf_curlist].qf_nonevalid = FALSE;
3770     qi->qf_lists[qi->qf_curlist].qf_ptr = qi->qf_lists[qi->qf_curlist].qf_start;
3771     qi->qf_lists[qi->qf_curlist].qf_index = 1;
3772 
3773 #ifdef FEAT_WINDOWS
3774     qf_update_buffer(qi);
3775 #endif
3776 
3777     return retval;
3778 }
3779 #endif
3780 
3781 /*
3782  * ":[range]cbuffer [bufnr]" command.
3783  * ":[range]caddbuffer [bufnr]" command.
3784  * ":[range]cgetbuffer [bufnr]" command.
3785  * ":[range]lbuffer [bufnr]" command.
3786  * ":[range]laddbuffer [bufnr]" command.
3787  * ":[range]lgetbuffer [bufnr]" command.
3788  */
3789     void
3790 ex_cbuffer(eap)
3791     exarg_T   *eap;
3792 {
3793     buf_T	*buf = NULL;
3794     qf_info_T	*qi = &ql_info;
3795 
3796     if (eap->cmdidx == CMD_lbuffer || eap->cmdidx == CMD_lgetbuffer
3797 	    || eap->cmdidx == CMD_laddbuffer)
3798     {
3799 	qi = ll_get_or_alloc_list(curwin);
3800 	if (qi == NULL)
3801 	    return;
3802     }
3803 
3804     if (*eap->arg == NUL)
3805 	buf = curbuf;
3806     else if (*skipwhite(skipdigits(eap->arg)) == NUL)
3807 	buf = buflist_findnr(atoi((char *)eap->arg));
3808     if (buf == NULL)
3809 	EMSG(_(e_invarg));
3810     else if (buf->b_ml.ml_mfp == NULL)
3811 	EMSG(_("E681: Buffer is not loaded"));
3812     else
3813     {
3814 	if (eap->addr_count == 0)
3815 	{
3816 	    eap->line1 = 1;
3817 	    eap->line2 = buf->b_ml.ml_line_count;
3818 	}
3819 	if (eap->line1 < 1 || eap->line1 > buf->b_ml.ml_line_count
3820 		|| eap->line2 < 1 || eap->line2 > buf->b_ml.ml_line_count)
3821 	    EMSG(_(e_invrange));
3822 	else
3823 	{
3824 	    char_u *qf_title = *eap->cmdlinep;
3825 
3826 	    if (buf->b_sfname)
3827 	    {
3828 		vim_snprintf((char *)IObuff, IOSIZE, "%s (%s)",
3829 				     (char *)qf_title, (char *)buf->b_sfname);
3830 		qf_title = IObuff;
3831 	    }
3832 
3833 	    if (qf_init_ext(qi, NULL, buf, NULL, p_efm,
3834 			    (eap->cmdidx != CMD_caddbuffer
3835 			     && eap->cmdidx != CMD_laddbuffer),
3836 						   eap->line1, eap->line2,
3837 						   qf_title) > 0
3838 		    && (eap->cmdidx == CMD_cbuffer
3839 			|| eap->cmdidx == CMD_lbuffer))
3840 		qf_jump(qi, 0, 0, eap->forceit);  /* display first error */
3841 	}
3842     }
3843 }
3844 
3845 #if defined(FEAT_EVAL) || defined(PROTO)
3846 /*
3847  * ":cexpr {expr}", ":cgetexpr {expr}", ":caddexpr {expr}" command.
3848  * ":lexpr {expr}", ":lgetexpr {expr}", ":laddexpr {expr}" command.
3849  */
3850     void
3851 ex_cexpr(eap)
3852     exarg_T	*eap;
3853 {
3854     typval_T	*tv;
3855     qf_info_T	*qi = &ql_info;
3856 
3857     if (eap->cmdidx == CMD_lexpr || eap->cmdidx == CMD_lgetexpr
3858 	    || eap->cmdidx == CMD_laddexpr)
3859     {
3860 	qi = ll_get_or_alloc_list(curwin);
3861 	if (qi == NULL)
3862 	    return;
3863     }
3864 
3865     /* Evaluate the expression.  When the result is a string or a list we can
3866      * use it to fill the errorlist. */
3867     tv = eval_expr(eap->arg, NULL);
3868     if (tv != NULL)
3869     {
3870 	if ((tv->v_type == VAR_STRING && tv->vval.v_string != NULL)
3871 		|| (tv->v_type == VAR_LIST && tv->vval.v_list != NULL))
3872 	{
3873 	    if (qf_init_ext(qi, NULL, NULL, tv, p_efm,
3874 			    (eap->cmdidx != CMD_caddexpr
3875 			     && eap->cmdidx != CMD_laddexpr),
3876 				 (linenr_T)0, (linenr_T)0, *eap->cmdlinep) > 0
3877 		    && (eap->cmdidx == CMD_cexpr
3878 			|| eap->cmdidx == CMD_lexpr))
3879 		qf_jump(qi, 0, 0, eap->forceit);  /* display first error */
3880 	}
3881 	else
3882 	    EMSG(_("E777: String or List expected"));
3883 	free_tv(tv);
3884     }
3885 }
3886 #endif
3887 
3888 /*
3889  * ":helpgrep {pattern}"
3890  */
3891     void
3892 ex_helpgrep(eap)
3893     exarg_T	*eap;
3894 {
3895     regmatch_T	regmatch;
3896     char_u	*save_cpo;
3897     char_u	*p;
3898     int		fcount;
3899     char_u	**fnames;
3900     FILE	*fd;
3901     int		fi;
3902     qfline_T	*prevp = NULL;
3903     long	lnum;
3904 #ifdef FEAT_MULTI_LANG
3905     char_u	*lang;
3906 #endif
3907     qf_info_T	*qi = &ql_info;
3908     int		new_qi = FALSE;
3909     win_T	*wp;
3910 #ifdef FEAT_AUTOCMD
3911     char_u	*au_name =  NULL;
3912 #endif
3913 
3914 #ifdef FEAT_MULTI_LANG
3915     /* Check for a specified language */
3916     lang = check_help_lang(eap->arg);
3917 #endif
3918 
3919 #ifdef FEAT_AUTOCMD
3920     switch (eap->cmdidx)
3921     {
3922 	case CMD_helpgrep:  au_name = (char_u *)"helpgrep"; break;
3923 	case CMD_lhelpgrep: au_name = (char_u *)"lhelpgrep"; break;
3924 	default: break;
3925     }
3926     if (au_name != NULL)
3927     {
3928 	apply_autocmds(EVENT_QUICKFIXCMDPRE, au_name,
3929 					       curbuf->b_fname, TRUE, curbuf);
3930 	if (did_throw || force_abort)
3931 	    return;
3932     }
3933 #endif
3934 
3935     /* Make 'cpoptions' empty, the 'l' flag should not be used here. */
3936     save_cpo = p_cpo;
3937     p_cpo = empty_option;
3938 
3939     if (eap->cmdidx == CMD_lhelpgrep)
3940     {
3941 	/* Find an existing help window */
3942 	FOR_ALL_WINDOWS(wp)
3943 	    if (wp->w_buffer != NULL && wp->w_buffer->b_help)
3944 		break;
3945 
3946 	if (wp == NULL)	    /* Help window not found */
3947 	    qi = NULL;
3948 	else
3949 	    qi = wp->w_llist;
3950 
3951 	if (qi == NULL)
3952 	{
3953 	    /* Allocate a new location list for help text matches */
3954 	    if ((qi = ll_new_list()) == NULL)
3955 		return;
3956 	    new_qi = TRUE;
3957 	}
3958     }
3959 
3960     regmatch.regprog = vim_regcomp(eap->arg, RE_MAGIC + RE_STRING);
3961     regmatch.rm_ic = FALSE;
3962     if (regmatch.regprog != NULL)
3963     {
3964 #ifdef FEAT_MBYTE
3965 	vimconv_T vc;
3966 
3967 	/* Help files are in utf-8 or latin1, convert lines when 'encoding'
3968 	 * differs. */
3969 	vc.vc_type = CONV_NONE;
3970 	if (!enc_utf8)
3971 	    convert_setup(&vc, (char_u *)"utf-8", p_enc);
3972 #endif
3973 
3974 	/* create a new quickfix list */
3975 	qf_new_list(qi, *eap->cmdlinep);
3976 
3977 	/* Go through all directories in 'runtimepath' */
3978 	p = p_rtp;
3979 	while (*p != NUL && !got_int)
3980 	{
3981 	    copy_option_part(&p, NameBuff, MAXPATHL, ",");
3982 
3983 	    /* Find all "*.txt" and "*.??x" files in the "doc" directory. */
3984 	    add_pathsep(NameBuff);
3985 	    STRCAT(NameBuff, "doc/*.\\(txt\\|??x\\)");
3986 	    if (gen_expand_wildcards(1, &NameBuff, &fcount,
3987 					     &fnames, EW_FILE|EW_SILENT) == OK
3988 		    && fcount > 0)
3989 	    {
3990 		for (fi = 0; fi < fcount && !got_int; ++fi)
3991 		{
3992 #ifdef FEAT_MULTI_LANG
3993 		    /* Skip files for a different language. */
3994 		    if (lang != NULL
3995 			    && STRNICMP(lang, fnames[fi]
3996 					    + STRLEN(fnames[fi]) - 3, 2) != 0
3997 			    && !(STRNICMP(lang, "en", 2) == 0
3998 				&& STRNICMP("txt", fnames[fi]
3999 					   + STRLEN(fnames[fi]) - 3, 3) == 0))
4000 			    continue;
4001 #endif
4002 		    fd = mch_fopen((char *)fnames[fi], "r");
4003 		    if (fd != NULL)
4004 		    {
4005 			lnum = 1;
4006 			while (!vim_fgets(IObuff, IOSIZE, fd) && !got_int)
4007 			{
4008 			    char_u    *line = IObuff;
4009 #ifdef FEAT_MBYTE
4010 			    /* Convert a line if 'encoding' is not utf-8 and
4011 			     * the line contains a non-ASCII character. */
4012 			    if (vc.vc_type != CONV_NONE
4013 						   && has_non_ascii(IObuff)) {
4014 				line = string_convert(&vc, IObuff, NULL);
4015 				if (line == NULL)
4016 				    line = IObuff;
4017 			    }
4018 #endif
4019 
4020 			    if (vim_regexec(&regmatch, line, (colnr_T)0))
4021 			    {
4022 				int	l = (int)STRLEN(line);
4023 
4024 				/* remove trailing CR, LF, spaces, etc. */
4025 				while (l > 0 && line[l - 1] <= ' ')
4026 				     line[--l] = NUL;
4027 
4028 				if (qf_add_entry(qi, &prevp,
4029 					    NULL,	/* dir */
4030 					    fnames[fi],
4031 					    0,
4032 					    line,
4033 					    lnum,
4034 					    (int)(regmatch.startp[0] - line)
4035 								+ 1, /* col */
4036 					    FALSE,	/* vis_col */
4037 					    NULL,	/* search pattern */
4038 					    0,		/* nr */
4039 					    1,		/* type */
4040 					    TRUE	/* valid */
4041 					    ) == FAIL)
4042 				{
4043 				    got_int = TRUE;
4044 #ifdef FEAT_MBYTE
4045 				    if (line != IObuff)
4046 					vim_free(line);
4047 #endif
4048 				    break;
4049 				}
4050 			    }
4051 #ifdef FEAT_MBYTE
4052 			    if (line != IObuff)
4053 				vim_free(line);
4054 #endif
4055 			    ++lnum;
4056 			    line_breakcheck();
4057 			}
4058 			fclose(fd);
4059 		    }
4060 		}
4061 		FreeWild(fcount, fnames);
4062 	    }
4063 	}
4064 
4065 	vim_free(regmatch.regprog);
4066 #ifdef FEAT_MBYTE
4067 	if (vc.vc_type != CONV_NONE)
4068 	    convert_setup(&vc, NULL, NULL);
4069 #endif
4070 
4071 	qi->qf_lists[qi->qf_curlist].qf_nonevalid = FALSE;
4072 	qi->qf_lists[qi->qf_curlist].qf_ptr =
4073 	    qi->qf_lists[qi->qf_curlist].qf_start;
4074 	qi->qf_lists[qi->qf_curlist].qf_index = 1;
4075     }
4076 
4077     if (p_cpo == empty_option)
4078 	p_cpo = save_cpo;
4079     else
4080 	/* Darn, some plugin changed the value. */
4081 	free_string_option(save_cpo);
4082 
4083 #ifdef FEAT_WINDOWS
4084     qf_update_buffer(qi);
4085 #endif
4086 
4087 #ifdef FEAT_AUTOCMD
4088     if (au_name != NULL)
4089     {
4090 	apply_autocmds(EVENT_QUICKFIXCMDPOST, au_name,
4091 					       curbuf->b_fname, TRUE, curbuf);
4092 	if (!new_qi && qi != &ql_info && qf_find_buf(qi) == NULL)
4093 	    /* autocommands made "qi" invalid */
4094 	    return;
4095     }
4096 #endif
4097 
4098     /* Jump to first match. */
4099     if (qi->qf_lists[qi->qf_curlist].qf_count > 0)
4100 	qf_jump(qi, 0, 0, FALSE);
4101     else
4102 	EMSG2(_(e_nomatch2), eap->arg);
4103 
4104     if (eap->cmdidx == CMD_lhelpgrep)
4105     {
4106 	/* If the help window is not opened or if it already points to the
4107 	 * correct location list, then free the new location list. */
4108 	if (!curwin->w_buffer->b_help || curwin->w_llist == qi)
4109 	{
4110 	    if (new_qi)
4111 		ll_free_all(&qi);
4112 	}
4113 	else if (curwin->w_llist == NULL)
4114 	    curwin->w_llist = qi;
4115     }
4116 }
4117 
4118 #endif /* FEAT_QUICKFIX */
4119