xref: /vim-8.2.3635/src/quickfix.c (revision e37d50a5)
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 } qf_list_T;
60 
61 struct qf_info_S
62 {
63     /*
64      * Count of references to this list. Used only for location lists.
65      * When a location list window reference this list, qf_refcount
66      * will be 2. Otherwise, qf_refcount will be 1. When qf_refcount
67      * reaches 0, the list is freed.
68      */
69     int		qf_refcount;
70     int		qf_listcount;	    /* current number of lists */
71     int		qf_curlist;	    /* current error list */
72     qf_list_T	qf_lists[LISTCOUNT];
73 };
74 
75 static qf_info_T ql_info;	/* global quickfix list */
76 
77 #define FMT_PATTERNS 10		/* maximum number of % recognized */
78 
79 /*
80  * Structure used to hold the info of one part of 'errorformat'
81  */
82 typedef struct efm_S efm_T;
83 struct efm_S
84 {
85     regprog_T	    *prog;	/* pre-formatted part of 'errorformat' */
86     efm_T	    *next;	/* pointer to next (NULL if last) */
87     char_u	    addr[FMT_PATTERNS]; /* indices of used % patterns */
88     char_u	    prefix;	/* prefix of this format line: */
89 				/*   'D' enter directory */
90 				/*   'X' leave directory */
91 				/*   'A' start of multi-line message */
92 				/*   'E' error message */
93 				/*   'W' warning message */
94 				/*   'I' informational message */
95 				/*   'C' continuation line */
96 				/*   'Z' end of multi-line message */
97 				/*   'G' general, unspecific message */
98 				/*   'P' push file (partial) message */
99 				/*   'Q' pop/quit file (partial) message */
100 				/*   'O' overread (partial) message */
101     char_u	    flags;	/* additional flags given in prefix */
102 				/*   '-' do not include this line */
103 				/*   '+' include whole line in message */
104     int		    conthere;	/* %> used */
105 };
106 
107 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));
108 static void	qf_new_list __ARGS((qf_info_T *qi));
109 static void	ll_free_all __ARGS((qf_info_T **pqi));
110 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));
111 static qf_info_T *ll_new_list __ARGS((void));
112 static void	qf_msg __ARGS((qf_info_T *qi));
113 static void	qf_free __ARGS((qf_info_T *qi, int idx));
114 static char_u	*qf_types __ARGS((int, int));
115 static int	qf_get_fnum __ARGS((char_u *, char_u *));
116 static char_u	*qf_push_dir __ARGS((char_u *, struct dir_stack_T **));
117 static char_u	*qf_pop_dir __ARGS((struct dir_stack_T **));
118 static char_u	*qf_guess_filepath __ARGS((char_u *));
119 static void	qf_fmt_text __ARGS((char_u *text, char_u *buf, int bufsize));
120 static void	qf_clean_dir_stack __ARGS((struct dir_stack_T **));
121 #ifdef FEAT_WINDOWS
122 static int	qf_win_pos_update __ARGS((qf_info_T *qi, int old_qf_index));
123 static int	is_qf_win __ARGS((win_T *win, qf_info_T *qi));
124 static win_T	*qf_find_win __ARGS((qf_info_T *qi));
125 static buf_T	*qf_find_buf __ARGS((qf_info_T *qi));
126 static void	qf_update_buffer __ARGS((qf_info_T *qi));
127 static void	qf_fill_buffer __ARGS((qf_info_T *qi));
128 #endif
129 static char_u	*get_mef_name __ARGS((void));
130 static buf_T	*load_dummy_buffer __ARGS((char_u *fname));
131 static void	wipe_dummy_buffer __ARGS((buf_T *buf));
132 static void	unload_dummy_buffer __ARGS((buf_T *buf));
133 static qf_info_T *ll_get_or_alloc_list __ARGS((win_T *));
134 
135 /* Quickfix window check helper macro */
136 #define IS_QF_WINDOW(wp) (bt_quickfix(wp->w_buffer) && wp->w_llist_ref == NULL)
137 /* Location list window check helper macro */
138 #define IS_LL_WINDOW(wp) (bt_quickfix(wp->w_buffer) && wp->w_llist_ref != NULL)
139 /*
140  * Return location list for window 'wp'
141  * For location list window, return the referenced location list
142  */
143 #define GET_LOC_LIST(wp) (IS_LL_WINDOW(wp) ? wp->w_llist_ref : wp->w_llist)
144 
145 /*
146  * Read the errorfile "efile" into memory, line by line, building the error
147  * list.
148  * Return -1 for error, number of errors for success.
149  */
150     int
151 qf_init(wp, efile, errorformat, newlist)
152     win_T	    *wp;
153     char_u	    *efile;
154     char_u	    *errorformat;
155     int		    newlist;		/* TRUE: start a new error list */
156 {
157     qf_info_T	    *qi = &ql_info;
158 
159     if (efile == NULL)
160 	return FAIL;
161 
162     if (wp != NULL)
163     {
164 	qi = ll_get_or_alloc_list(wp);
165 	if (qi == NULL)
166 	    return FAIL;
167     }
168 
169     return qf_init_ext(qi, efile, curbuf, NULL, errorformat, newlist,
170 						    (linenr_T)0, (linenr_T)0);
171 }
172 
173 /*
174  * Read the errorfile "efile" into memory, line by line, building the error
175  * list.
176  * Alternative: when "efile" is null read errors from buffer "buf".
177  * Always use 'errorformat' from "buf" if there is a local value.
178  * Then lnumfirst and lnumlast specify the range of lines to use.
179  * Return -1 for error, number of errors for success.
180  */
181     static int
182 qf_init_ext(qi, efile, buf, tv, errorformat, newlist, lnumfirst, lnumlast)
183     qf_info_T	    *qi;
184     char_u	    *efile;
185     buf_T	    *buf;
186     typval_T	    *tv;
187     char_u	    *errorformat;
188     int		    newlist;		/* TRUE: start a new error list */
189     linenr_T	    lnumfirst;		/* first line number to use */
190     linenr_T	    lnumlast;		/* last line number to use */
191 {
192     char_u	    *namebuf;
193     char_u	    *errmsg;
194     char_u	    *pattern;
195     char_u	    *fmtstr = NULL;
196     int		    col = 0;
197     char_u	    use_viscol = FALSE;
198     int		    type = 0;
199     int		    valid;
200     linenr_T	    buflnum = lnumfirst;
201     long	    lnum = 0L;
202     int		    enr = 0;
203     FILE	    *fd = NULL;
204     qfline_T	    *qfprev = NULL;	/* init to make SASC shut up */
205     char_u	    *efmp;
206     efm_T	    *fmt_first = NULL;
207     efm_T	    *fmt_last = NULL;
208     efm_T	    *fmt_ptr;
209     efm_T	    *fmt_start = NULL;
210     char_u	    *efm;
211     char_u	    *ptr;
212     char_u	    *srcptr;
213     int		    len;
214     int		    i;
215     int		    round;
216     int		    idx = 0;
217     int		    multiline = FALSE;
218     int		    multiignore = FALSE;
219     int		    multiscan = FALSE;
220     int		    retval = -1;	/* default: return error flag */
221     char_u	    *directory = NULL;
222     char_u	    *currfile = NULL;
223     char_u	    *tail = NULL;
224     char_u	    *p_str = NULL;
225     listitem_T	    *p_li = NULL;
226     struct dir_stack_T  *file_stack = NULL;
227     regmatch_T	    regmatch;
228     static struct fmtpattern
229     {
230 	char_u	convchar;
231 	char	*pattern;
232     }		    fmt_pat[FMT_PATTERNS] =
233 		    {
234 			{'f', ".\\+"},	    /* only used when at end */
235 			{'n', "\\d\\+"},
236 			{'l', "\\d\\+"},
237 			{'c', "\\d\\+"},
238 			{'t', "."},
239 			{'m', ".\\+"},
240 			{'r', ".*"},
241 			{'p', "[- .]*"},
242 			{'v', "\\d\\+"},
243 			{'s', ".\\+"}
244 		    };
245 
246     namebuf = alloc(CMDBUFFSIZE + 1);
247     errmsg = alloc(CMDBUFFSIZE + 1);
248     pattern = alloc(CMDBUFFSIZE + 1);
249     if (namebuf == NULL || errmsg == NULL || pattern == NULL)
250 	goto qf_init_end;
251 
252     if (efile != NULL && (fd = mch_fopen((char *)efile, "r")) == NULL)
253     {
254 	EMSG2(_(e_openerrf), efile);
255 	goto qf_init_end;
256     }
257 
258     if (newlist || qi->qf_curlist == qi->qf_listcount)
259 	/* make place for a new list */
260 	qf_new_list(qi);
261     else if (qi->qf_lists[qi->qf_curlist].qf_count > 0)
262 	/* Adding to existing list, find last entry. */
263 	for (qfprev = qi->qf_lists[qi->qf_curlist].qf_start;
264 			    qfprev->qf_next != qfprev; qfprev = qfprev->qf_next)
265 	    ;
266 
267 /*
268  * Each part of the format string is copied and modified from errorformat to
269  * regex prog.  Only a few % characters are allowed.
270  */
271     /* Use the local value of 'errorformat' if it's set. */
272     if (errorformat == p_efm && tv == NULL && *buf->b_p_efm != NUL)
273 	efm = buf->b_p_efm;
274     else
275 	efm = errorformat;
276     /*
277      * Get some space to modify the format string into.
278      */
279     i = (FMT_PATTERNS * 3) + ((int)STRLEN(efm) << 2);
280     for (round = FMT_PATTERNS; round > 0; )
281 	i += (int)STRLEN(fmt_pat[--round].pattern);
282 #ifdef COLON_IN_FILENAME
283     i += 12; /* "%f" can become twelve chars longer */
284 #else
285     i += 2; /* "%f" can become two chars longer */
286 #endif
287     if ((fmtstr = alloc(i)) == NULL)
288 	goto error2;
289 
290     while (efm[0] != NUL)
291     {
292 	/*
293 	 * Allocate a new eformat structure and put it at the end of the list
294 	 */
295 	fmt_ptr = (efm_T *)alloc_clear((unsigned)sizeof(efm_T));
296 	if (fmt_ptr == NULL)
297 	    goto error2;
298 	if (fmt_first == NULL)	    /* first one */
299 	    fmt_first = fmt_ptr;
300 	else
301 	    fmt_last->next = fmt_ptr;
302 	fmt_last = fmt_ptr;
303 
304 	/*
305 	 * Isolate one part in the 'errorformat' option
306 	 */
307 	for (len = 0; efm[len] != NUL && efm[len] != ','; ++len)
308 	    if (efm[len] == '\\' && efm[len + 1] != NUL)
309 		++len;
310 
311 	/*
312 	 * Build regexp pattern from current 'errorformat' option
313 	 */
314 	ptr = fmtstr;
315 	*ptr++ = '^';
316 	round = 0;
317 	for (efmp = efm; efmp < efm + len; ++efmp)
318 	{
319 	    if (*efmp == '%')
320 	    {
321 		++efmp;
322 		for (idx = 0; idx < FMT_PATTERNS; ++idx)
323 		    if (fmt_pat[idx].convchar == *efmp)
324 			break;
325 		if (idx < FMT_PATTERNS)
326 		{
327 		    if (fmt_ptr->addr[idx])
328 		    {
329 			sprintf((char *)errmsg,
330 				_("E372: Too many %%%c in format string"), *efmp);
331 			EMSG(errmsg);
332 			goto error2;
333 		    }
334 		    if ((idx
335 				&& idx < 6
336 				&& vim_strchr((char_u *)"DXOPQ",
337 						     fmt_ptr->prefix) != NULL)
338 			    || (idx == 6
339 				&& vim_strchr((char_u *)"OPQ",
340 						    fmt_ptr->prefix) == NULL))
341 		    {
342 			sprintf((char *)errmsg,
343 				_("E373: Unexpected %%%c in format string"), *efmp);
344 			EMSG(errmsg);
345 			goto error2;
346 		    }
347 		    fmt_ptr->addr[idx] = (char_u)++round;
348 		    *ptr++ = '\\';
349 		    *ptr++ = '(';
350 #ifdef BACKSLASH_IN_FILENAME
351 		    if (*efmp == 'f')
352 		    {
353 			/* Also match "c:" in the file name, even when
354 			 * checking for a colon next: "%f:".
355 			 * "\%(\a:\)\=" */
356 			STRCPY(ptr, "\\%(\\a:\\)\\=");
357 			ptr += 10;
358 		    }
359 #endif
360 		    if (*efmp == 'f' && efmp[1] != NUL)
361 		    {
362 			if (efmp[1] != '\\' && efmp[1] != '%')
363 			{
364 			    /* A file name may contain spaces, but this isn't
365 			     * in "\f".  For "%f:%l:%m" there may be a ":" in
366 			     * the file name.  Use ".\{-1,}x" instead (x is
367 			     * the next character), the requirement that :999:
368 			     * follows should work. */
369 			    STRCPY(ptr, ".\\{-1,}");
370 			    ptr += 7;
371 			}
372 			else
373 			{
374 			    /* File name followed by '\\' or '%': include as
375 			     * many file name chars as possible. */
376 			    STRCPY(ptr, "\\f\\+");
377 			    ptr += 4;
378 			}
379 		    }
380 		    else
381 		    {
382 			srcptr = (char_u *)fmt_pat[idx].pattern;
383 			while ((*ptr = *srcptr++) != NUL)
384 			    ++ptr;
385 		    }
386 		    *ptr++ = '\\';
387 		    *ptr++ = ')';
388 		}
389 		else if (*efmp == '*')
390 		{
391 		    if (*++efmp == '[' || *efmp == '\\')
392 		    {
393 			if ((*ptr++ = *efmp) == '[')	/* %*[^a-z0-9] etc. */
394 			{
395 			    if (efmp[1] == '^')
396 				*ptr++ = *++efmp;
397 			    if (efmp < efm + len)
398 			    {
399 				*ptr++ = *++efmp;	    /* could be ']' */
400 				while (efmp < efm + len
401 					&& (*ptr++ = *++efmp) != ']')
402 				    /* skip */;
403 				if (efmp == efm + len)
404 				{
405 				    EMSG(_("E374: Missing ] in format string"));
406 				    goto error2;
407 				}
408 			    }
409 			}
410 			else if (efmp < efm + len)	/* %*\D, %*\s etc. */
411 			    *ptr++ = *++efmp;
412 			*ptr++ = '\\';
413 			*ptr++ = '+';
414 		    }
415 		    else
416 		    {
417 			/* TODO: scanf()-like: %*ud, %*3c, %*f, ... ? */
418 			sprintf((char *)errmsg,
419 				_("E375: Unsupported %%%c in format string"), *efmp);
420 			EMSG(errmsg);
421 			goto error2;
422 		    }
423 		}
424 		else if (vim_strchr((char_u *)"%\\.^$~[", *efmp) != NULL)
425 		    *ptr++ = *efmp;		/* regexp magic characters */
426 		else if (*efmp == '#')
427 		    *ptr++ = '*';
428 		else if (*efmp == '>')
429 		    fmt_ptr->conthere = TRUE;
430 		else if (efmp == efm + 1)		/* analyse prefix */
431 		{
432 		    if (vim_strchr((char_u *)"+-", *efmp) != NULL)
433 			fmt_ptr->flags = *efmp++;
434 		    if (vim_strchr((char_u *)"DXAEWICZGOPQ", *efmp) != NULL)
435 			fmt_ptr->prefix = *efmp;
436 		    else
437 		    {
438 			sprintf((char *)errmsg,
439 				_("E376: Invalid %%%c in format string prefix"), *efmp);
440 			EMSG(errmsg);
441 			goto error2;
442 		    }
443 		}
444 		else
445 		{
446 		    sprintf((char *)errmsg,
447 			    _("E377: Invalid %%%c in format string"), *efmp);
448 		    EMSG(errmsg);
449 		    goto error2;
450 		}
451 	    }
452 	    else			/* copy normal character */
453 	    {
454 		if (*efmp == '\\' && efmp + 1 < efm + len)
455 		    ++efmp;
456 		else if (vim_strchr((char_u *)".*^$~[", *efmp) != NULL)
457 		    *ptr++ = '\\';	/* escape regexp atoms */
458 		if (*efmp)
459 		    *ptr++ = *efmp;
460 	    }
461 	}
462 	*ptr++ = '$';
463 	*ptr = NUL;
464 	if ((fmt_ptr->prog = vim_regcomp(fmtstr, RE_MAGIC + RE_STRING)) == NULL)
465 	    goto error2;
466 	/*
467 	 * Advance to next part
468 	 */
469 	efm = skip_to_option_part(efm + len);	/* skip comma and spaces */
470     }
471     if (fmt_first == NULL)	/* nothing found */
472     {
473 	EMSG(_("E378: 'errorformat' contains no pattern"));
474 	goto error2;
475     }
476 
477     /*
478      * got_int is reset here, because it was probably set when killing the
479      * ":make" command, but we still want to read the errorfile then.
480      */
481     got_int = FALSE;
482 
483     /* Always ignore case when looking for a matching error. */
484     regmatch.rm_ic = TRUE;
485 
486     if (tv != NULL)
487     {
488 	if (tv->v_type == VAR_STRING)
489 	    p_str = tv->vval.v_string;
490 	else if (tv->v_type == VAR_LIST)
491 	    p_li = tv->vval.v_list->lv_first;
492     }
493 
494     /*
495      * Read the lines in the error file one by one.
496      * Try to recognize one of the error formats in each line.
497      */
498     while (!got_int)
499     {
500 	/* Get the next line. */
501 	if (fd == NULL)
502 	{
503 	    if (tv != NULL)
504 	    {
505 		if (tv->v_type == VAR_STRING)
506 		{
507 		    /* Get the next line from the supplied string */
508 		    char_u *p;
509 
510 		    if (!*p_str) /* Reached the end of the string */
511 			break;
512 
513 		    p = vim_strchr(p_str, '\n');
514 		    if (p)
515 			len = (int)(p - p_str + 1);
516 		    else
517 			len = (int)STRLEN(p_str);
518 
519 		    if (len > CMDBUFFSIZE - 2)
520 			vim_strncpy(IObuff, p_str, CMDBUFFSIZE - 2);
521 		    else
522 			vim_strncpy(IObuff, p_str, len);
523 
524 		    p_str += len;
525 		}
526 		else if (tv->v_type == VAR_LIST)
527 		{
528 		    /* Get the next line from the supplied list */
529 		    while (p_li && p_li->li_tv.v_type != VAR_STRING)
530 			p_li = p_li->li_next;	/* Skip non-string items */
531 
532 		    if (!p_li)			/* End of the list */
533 			break;
534 
535 		    len = (int)STRLEN(p_li->li_tv.vval.v_string);
536 		    if (len > CMDBUFFSIZE - 2)
537 			len = CMDBUFFSIZE - 2;
538 
539 		    vim_strncpy(IObuff, p_li->li_tv.vval.v_string, len);
540 
541 		    p_li = p_li->li_next;	/* next item */
542 		}
543 	    }
544 	    else
545 	    {
546 		/* Get the next line from the supplied buffer */
547 		if (buflnum > lnumlast)
548 		    break;
549 		vim_strncpy(IObuff, ml_get_buf(buf, buflnum++, FALSE),
550 			    CMDBUFFSIZE - 2);
551 	    }
552 	}
553 	else if (fgets((char *)IObuff, CMDBUFFSIZE - 2, fd) == NULL)
554 	    break;
555 
556 	IObuff[CMDBUFFSIZE - 2] = NUL;  /* for very long lines */
557 	if ((efmp = vim_strrchr(IObuff, '\n')) != NULL)
558 	    *efmp = NUL;
559 #ifdef USE_CRNL
560 	if ((efmp = vim_strrchr(IObuff, '\r')) != NULL)
561 	    *efmp = NUL;
562 #endif
563 
564 	/* If there was no %> item start at the first pattern */
565 	if (fmt_start == NULL)
566 	    fmt_ptr = fmt_first;
567 	else
568 	{
569 	    fmt_ptr = fmt_start;
570 	    fmt_start = NULL;
571 	}
572 
573 	/*
574 	 * Try to match each part of 'errorformat' until we find a complete
575 	 * match or no match.
576 	 */
577 	valid = TRUE;
578 restofline:
579 	for ( ; fmt_ptr != NULL; fmt_ptr = fmt_ptr->next)
580 	{
581 	    idx = fmt_ptr->prefix;
582 	    if (multiscan && vim_strchr((char_u *)"OPQ", idx) == NULL)
583 		continue;
584 	    namebuf[0] = NUL;
585 	    pattern[0] = NUL;
586 	    if (!multiscan)
587 		errmsg[0] = NUL;
588 	    lnum = 0;
589 	    col = 0;
590 	    use_viscol = FALSE;
591 	    enr = -1;
592 	    type = 0;
593 	    tail = NULL;
594 
595 	    regmatch.regprog = fmt_ptr->prog;
596 	    if (vim_regexec(&regmatch, IObuff, (colnr_T)0))
597 	    {
598 		if ((idx == 'C' || idx == 'Z') && !multiline)
599 		    continue;
600 		if (vim_strchr((char_u *)"EWI", idx) != NULL)
601 		    type = idx;
602 		else
603 		    type = 0;
604 		/*
605 		 * Extract error message data from matched line.
606 		 * We check for an actual submatch, because "\[" and "\]" in
607 		 * the 'errorformat' may cause the wrong submatch to be used.
608 		 */
609 		if ((i = (int)fmt_ptr->addr[0]) > 0)		/* %f */
610 		{
611 		    int c;
612 
613 		    if (regmatch.startp[i] == NULL || regmatch.endp[i] == NULL)
614 			continue;
615 
616 		    /* Expand ~/file and $HOME/file to full path. */
617 		    c = *regmatch.endp[i];
618 		    *regmatch.endp[i] = NUL;
619 		    expand_env(regmatch.startp[i], namebuf, CMDBUFFSIZE);
620 		    *regmatch.endp[i] = c;
621 
622 		    if (vim_strchr((char_u *)"OPQ", idx) != NULL
623 						&& mch_getperm(namebuf) == -1)
624 			continue;
625 		}
626 		if ((i = (int)fmt_ptr->addr[1]) > 0)		/* %n */
627 		{
628 		    if (regmatch.startp[i] == NULL)
629 			continue;
630 		    enr = (int)atol((char *)regmatch.startp[i]);
631 		}
632 		if ((i = (int)fmt_ptr->addr[2]) > 0)		/* %l */
633 		{
634 		    if (regmatch.startp[i] == NULL)
635 			continue;
636 		    lnum = atol((char *)regmatch.startp[i]);
637 		}
638 		if ((i = (int)fmt_ptr->addr[3]) > 0)		/* %c */
639 		{
640 		    if (regmatch.startp[i] == NULL)
641 			continue;
642 		    col = (int)atol((char *)regmatch.startp[i]);
643 		}
644 		if ((i = (int)fmt_ptr->addr[4]) > 0)		/* %t */
645 		{
646 		    if (regmatch.startp[i] == NULL)
647 			continue;
648 		    type = *regmatch.startp[i];
649 		}
650 		if (fmt_ptr->flags == '+' && !multiscan)	/* %+ */
651 		    STRCPY(errmsg, IObuff);
652 		else if ((i = (int)fmt_ptr->addr[5]) > 0)	/* %m */
653 		{
654 		    if (regmatch.startp[i] == NULL || regmatch.endp[i] == NULL)
655 			continue;
656 		    len = (int)(regmatch.endp[i] - regmatch.startp[i]);
657 		    vim_strncpy(errmsg, regmatch.startp[i], len);
658 		}
659 		if ((i = (int)fmt_ptr->addr[6]) > 0)		/* %r */
660 		{
661 		    if (regmatch.startp[i] == NULL)
662 			continue;
663 		    tail = regmatch.startp[i];
664 		}
665 		if ((i = (int)fmt_ptr->addr[7]) > 0)		/* %p */
666 		{
667 		    if (regmatch.startp[i] == NULL || regmatch.endp[i] == NULL)
668 			continue;
669 		    col = (int)(regmatch.endp[i] - regmatch.startp[i] + 1);
670 		    if (*((char_u *)regmatch.startp[i]) != TAB)
671 			use_viscol = TRUE;
672 		}
673 		if ((i = (int)fmt_ptr->addr[8]) > 0)		/* %v */
674 		{
675 		    if (regmatch.startp[i] == NULL)
676 			continue;
677 		    col = (int)atol((char *)regmatch.startp[i]);
678 		    use_viscol = TRUE;
679 		}
680 		if ((i = (int)fmt_ptr->addr[9]) > 0)		/* %s */
681 		{
682 		    if (regmatch.startp[i] == NULL || regmatch.endp[i] == NULL)
683 			continue;
684 		    len = (int)(regmatch.endp[i] - regmatch.startp[i]);
685 		    if (len > CMDBUFFSIZE - 5)
686 			len = CMDBUFFSIZE - 5;
687 		    STRCPY(pattern, "^\\V");
688 		    STRNCAT(pattern, regmatch.startp[i], len);
689 		    pattern[len + 3] = '\\';
690 		    pattern[len + 4] = '$';
691 		    pattern[len + 5] = NUL;
692 		}
693 		break;
694 	    }
695 	}
696 	multiscan = FALSE;
697 
698 	if (fmt_ptr == NULL || idx == 'D' || idx == 'X')
699 	{
700 	    if (fmt_ptr != NULL)
701 	    {
702 		if (idx == 'D')				/* enter directory */
703 		{
704 		    if (*namebuf == NUL)
705 		    {
706 			EMSG(_("E379: Missing or empty directory name"));
707 			goto error2;
708 		    }
709 		    if ((directory = qf_push_dir(namebuf, &dir_stack)) == NULL)
710 			goto error2;
711 		}
712 		else if (idx == 'X')			/* leave directory */
713 		    directory = qf_pop_dir(&dir_stack);
714 	    }
715 	    namebuf[0] = NUL;		/* no match found, remove file name */
716 	    lnum = 0;			/* don't jump to this line */
717 	    valid = FALSE;
718 	    STRCPY(errmsg, IObuff);	/* copy whole line to error message */
719 	    if (fmt_ptr == NULL)
720 		multiline = multiignore = FALSE;
721 	}
722 	else if (fmt_ptr != NULL)
723 	{
724 	    /* honor %> item */
725 	    if (fmt_ptr->conthere)
726 		fmt_start = fmt_ptr;
727 
728 	    if (vim_strchr((char_u *)"AEWI", idx) != NULL)
729 		multiline = TRUE;	/* start of a multi-line message */
730 	    else if (vim_strchr((char_u *)"CZ", idx) != NULL)
731 	    {				/* continuation of multi-line msg */
732 		if (qfprev == NULL)
733 		    goto error2;
734 		if (*errmsg && !multiignore)
735 		{
736 		    len = (int)STRLEN(qfprev->qf_text);
737 		    if ((ptr = alloc((unsigned)(len + STRLEN(errmsg) + 2)))
738 								    == NULL)
739 			goto error2;
740 		    STRCPY(ptr, qfprev->qf_text);
741 		    vim_free(qfprev->qf_text);
742 		    qfprev->qf_text = ptr;
743 		    *(ptr += len) = '\n';
744 		    STRCPY(++ptr, errmsg);
745 		}
746 		if (qfprev->qf_nr == -1)
747 		    qfprev->qf_nr = enr;
748 		if (vim_isprintc(type) && !qfprev->qf_type)
749 		    qfprev->qf_type = type;  /* only printable chars allowed */
750 		if (!qfprev->qf_lnum)
751 		    qfprev->qf_lnum = lnum;
752 		if (!qfprev->qf_col)
753 		    qfprev->qf_col = col;
754 		qfprev->qf_viscol = use_viscol;
755 		if (!qfprev->qf_fnum)
756 		    qfprev->qf_fnum = qf_get_fnum(directory,
757 					*namebuf || directory ? namebuf
758 					  : currfile && valid ? currfile : 0);
759 		if (idx == 'Z')
760 		    multiline = multiignore = FALSE;
761 		line_breakcheck();
762 		continue;
763 	    }
764 	    else if (vim_strchr((char_u *)"OPQ", idx) != NULL)
765 	    {
766 		/* global file names */
767 		valid = FALSE;
768 		if (*namebuf == NUL || mch_getperm(namebuf) >= 0)
769 		{
770 		    if (*namebuf && idx == 'P')
771 			currfile = qf_push_dir(namebuf, &file_stack);
772 		    else if (idx == 'Q')
773 			currfile = qf_pop_dir(&file_stack);
774 		    *namebuf = NUL;
775 		    if (tail && *tail)
776 		    {
777 			STRMOVE(IObuff, skipwhite(tail));
778 			multiscan = TRUE;
779 			goto restofline;
780 		    }
781 		}
782 	    }
783 	    if (fmt_ptr->flags == '-')	/* generally exclude this line */
784 	    {
785 		if (multiline)
786 		    multiignore = TRUE;	/* also exclude continuation lines */
787 		continue;
788 	    }
789 	}
790 
791 	if (qf_add_entry(qi, &qfprev,
792 			directory,
793 			(*namebuf || directory)
794 			    ? namebuf
795 			    : ((currfile && valid) ? currfile : (char_u *)NULL),
796 			0,
797 			errmsg,
798 			lnum,
799 			col,
800 			use_viscol,
801 			pattern,
802 			enr,
803 			type,
804 			valid) == FAIL)
805 	    goto error2;
806 	line_breakcheck();
807     }
808     if (fd == NULL || !ferror(fd))
809     {
810 	if (qi->qf_lists[qi->qf_curlist].qf_index == 0)
811 	{
812 	    /* no valid entry found */
813 	    qi->qf_lists[qi->qf_curlist].qf_ptr =
814 		qi->qf_lists[qi->qf_curlist].qf_start;
815 	    qi->qf_lists[qi->qf_curlist].qf_index = 1;
816 	    qi->qf_lists[qi->qf_curlist].qf_nonevalid = TRUE;
817 	}
818 	else
819 	{
820 	    qi->qf_lists[qi->qf_curlist].qf_nonevalid = FALSE;
821 	    if (qi->qf_lists[qi->qf_curlist].qf_ptr == NULL)
822 		qi->qf_lists[qi->qf_curlist].qf_ptr =
823 		    qi->qf_lists[qi->qf_curlist].qf_start;
824 	}
825 	/* return number of matches */
826 	retval = qi->qf_lists[qi->qf_curlist].qf_count;
827 	goto qf_init_ok;
828     }
829     EMSG(_(e_readerrf));
830 error2:
831     qf_free(qi, qi->qf_curlist);
832     qi->qf_listcount--;
833     if (qi->qf_curlist > 0)
834 	--qi->qf_curlist;
835 qf_init_ok:
836     if (fd != NULL)
837 	fclose(fd);
838     for (fmt_ptr = fmt_first; fmt_ptr != NULL; fmt_ptr = fmt_first)
839     {
840 	fmt_first = fmt_ptr->next;
841 	vim_free(fmt_ptr->prog);
842 	vim_free(fmt_ptr);
843     }
844     qf_clean_dir_stack(&dir_stack);
845     qf_clean_dir_stack(&file_stack);
846 qf_init_end:
847     vim_free(namebuf);
848     vim_free(errmsg);
849     vim_free(pattern);
850     vim_free(fmtstr);
851 
852 #ifdef FEAT_WINDOWS
853     qf_update_buffer(qi);
854 #endif
855 
856     return retval;
857 }
858 
859 /*
860  * Prepare for adding a new quickfix list.
861  */
862     static void
863 qf_new_list(qi)
864     qf_info_T	*qi;
865 {
866     int		i;
867 
868     /*
869      * If the current entry is not the last entry, delete entries below
870      * the current entry.  This makes it possible to browse in a tree-like
871      * way with ":grep'.
872      */
873     while (qi->qf_listcount > qi->qf_curlist + 1)
874 	qf_free(qi, --qi->qf_listcount);
875 
876     /*
877      * When the stack is full, remove to oldest entry
878      * Otherwise, add a new entry.
879      */
880     if (qi->qf_listcount == LISTCOUNT)
881     {
882 	qf_free(qi, 0);
883 	for (i = 1; i < LISTCOUNT; ++i)
884 	    qi->qf_lists[i - 1] = qi->qf_lists[i];
885 	qi->qf_curlist = LISTCOUNT - 1;
886     }
887     else
888 	qi->qf_curlist = qi->qf_listcount++;
889     qi->qf_lists[qi->qf_curlist].qf_index = 0;
890     qi->qf_lists[qi->qf_curlist].qf_count = 0;
891 }
892 
893 /*
894  * Free a location list
895  */
896     static void
897 ll_free_all(pqi)
898     qf_info_T	**pqi;
899 {
900     int		i;
901     qf_info_T	*qi;
902 
903     qi = *pqi;
904     if (qi == NULL)
905 	return;
906     *pqi = NULL;	/* Remove reference to this list */
907 
908     qi->qf_refcount--;
909     if (qi->qf_refcount < 1)
910     {
911 	/* No references to this location list */
912 	for (i = 0; i < qi->qf_listcount; ++i)
913 	    qf_free(qi, i);
914 	vim_free(qi);
915     }
916 }
917 
918     void
919 qf_free_all(wp)
920     win_T	*wp;
921 {
922     int		i;
923     qf_info_T	*qi = &ql_info;
924 
925     if (wp != NULL)
926     {
927 	/* location list */
928 	ll_free_all(&wp->w_llist);
929 	ll_free_all(&wp->w_llist_ref);
930     }
931     else
932 	/* quickfix list */
933 	for (i = 0; i < qi->qf_listcount; ++i)
934 	    qf_free(qi, i);
935 }
936 
937 /*
938  * Add an entry to the end of the list of errors.
939  * Returns OK or FAIL.
940  */
941     static int
942 qf_add_entry(qi, prevp, dir, fname, bufnum, mesg, lnum, col, vis_col, pattern,
943 	     nr, type, valid)
944     qf_info_T	*qi;		/* quickfix list */
945     qfline_T	**prevp;	/* pointer to previously added entry or NULL */
946     char_u	*dir;		/* optional directory name */
947     char_u	*fname;		/* file name or NULL */
948     int		bufnum;		/* buffer number or zero */
949     char_u	*mesg;		/* message */
950     long	lnum;		/* line number */
951     int		col;		/* column */
952     int		vis_col;	/* using visual column */
953     char_u	*pattern;	/* search pattern */
954     int		nr;		/* error number */
955     int		type;		/* type character */
956     int		valid;		/* valid entry */
957 {
958     qfline_T	*qfp;
959 
960     if ((qfp = (qfline_T *)alloc((unsigned)sizeof(qfline_T))) == NULL)
961 	return FAIL;
962     if (bufnum != 0)
963 	qfp->qf_fnum = bufnum;
964     else
965 	qfp->qf_fnum = qf_get_fnum(dir, fname);
966     if ((qfp->qf_text = vim_strsave(mesg)) == NULL)
967     {
968 	vim_free(qfp);
969 	return FAIL;
970     }
971     qfp->qf_lnum = lnum;
972     qfp->qf_col = col;
973     qfp->qf_viscol = vis_col;
974     if (pattern == NULL || *pattern == NUL)
975 	qfp->qf_pattern = NULL;
976     else if ((qfp->qf_pattern = vim_strsave(pattern)) == NULL)
977     {
978 	vim_free(qfp->qf_text);
979 	vim_free(qfp);
980 	return FAIL;
981     }
982     qfp->qf_nr = nr;
983     if (type != 1 && !vim_isprintc(type)) /* only printable chars allowed */
984 	type = 0;
985     qfp->qf_type = type;
986     qfp->qf_valid = valid;
987 
988     if (qi->qf_lists[qi->qf_curlist].qf_count == 0)
989 				/* first element in the list */
990     {
991 	qi->qf_lists[qi->qf_curlist].qf_start = qfp;
992 	qfp->qf_prev = qfp;	/* first element points to itself */
993     }
994     else
995     {
996 	qfp->qf_prev = *prevp;
997 	(*prevp)->qf_next = qfp;
998     }
999     qfp->qf_next = qfp;	/* last element points to itself */
1000     qfp->qf_cleared = FALSE;
1001     *prevp = qfp;
1002     ++qi->qf_lists[qi->qf_curlist].qf_count;
1003     if (qi->qf_lists[qi->qf_curlist].qf_index == 0 && qfp->qf_valid)
1004 				/* first valid entry */
1005     {
1006 	qi->qf_lists[qi->qf_curlist].qf_index =
1007 	    qi->qf_lists[qi->qf_curlist].qf_count;
1008 	qi->qf_lists[qi->qf_curlist].qf_ptr = qfp;
1009     }
1010 
1011     return OK;
1012 }
1013 
1014 /*
1015  * Allocate a new location list
1016  */
1017     static qf_info_T *
1018 ll_new_list()
1019 {
1020     qf_info_T *qi;
1021 
1022     qi = (qf_info_T *)alloc((unsigned)sizeof(qf_info_T));
1023     if (qi != NULL)
1024     {
1025 	vim_memset(qi, 0, (size_t)(sizeof(qf_info_T)));
1026 	qi->qf_refcount++;
1027     }
1028 
1029     return qi;
1030 }
1031 
1032 /*
1033  * Return the location list for window 'wp'.
1034  * If not present, allocate a location list
1035  */
1036     static qf_info_T *
1037 ll_get_or_alloc_list(wp)
1038     win_T   *wp;
1039 {
1040     if (IS_LL_WINDOW(wp))
1041 	/* For a location list window, use the referenced location list */
1042 	return wp->w_llist_ref;
1043 
1044     /*
1045      * For a non-location list window, w_llist_ref should not point to a
1046      * location list.
1047      */
1048     ll_free_all(&wp->w_llist_ref);
1049 
1050     if (wp->w_llist == NULL)
1051 	wp->w_llist = ll_new_list();	    /* new location list */
1052     return wp->w_llist;
1053 }
1054 
1055 /*
1056  * Copy the location list from window "from" to window "to".
1057  */
1058     void
1059 copy_loclist(from, to)
1060     win_T	*from;
1061     win_T	*to;
1062 {
1063     qf_info_T	*qi;
1064     int		idx;
1065     int		i;
1066 
1067     /*
1068      * When copying from a location list window, copy the referenced
1069      * location list. For other windows, copy the location list for
1070      * that window.
1071      */
1072     if (IS_LL_WINDOW(from))
1073 	qi = from->w_llist_ref;
1074     else
1075 	qi = from->w_llist;
1076 
1077     if (qi == NULL)		    /* no location list to copy */
1078 	return;
1079 
1080     /* allocate a new location list */
1081     if ((to->w_llist = ll_new_list()) == NULL)
1082 	return;
1083 
1084     to->w_llist->qf_listcount = qi->qf_listcount;
1085 
1086     /* Copy the location lists one at a time */
1087     for (idx = 0; idx < qi->qf_listcount; idx++)
1088     {
1089 	qf_list_T   *from_qfl;
1090 	qf_list_T   *to_qfl;
1091 
1092 	to->w_llist->qf_curlist = idx;
1093 
1094 	from_qfl = &qi->qf_lists[idx];
1095 	to_qfl = &to->w_llist->qf_lists[idx];
1096 
1097 	/* Some of the fields are populated by qf_add_entry() */
1098 	to_qfl->qf_nonevalid = from_qfl->qf_nonevalid;
1099 	to_qfl->qf_count = 0;
1100 	to_qfl->qf_index = 0;
1101 	to_qfl->qf_start = NULL;
1102 	to_qfl->qf_ptr = NULL;
1103 
1104 	if (from_qfl->qf_count)
1105 	{
1106 	    qfline_T    *from_qfp;
1107 	    qfline_T    *prevp = NULL;
1108 
1109 	    /* copy all the location entries in this list */
1110 	    for (i = 0, from_qfp = from_qfl->qf_start; i < from_qfl->qf_count;
1111 		 ++i, from_qfp = from_qfp->qf_next)
1112 	    {
1113 		if (qf_add_entry(to->w_llist, &prevp,
1114 				 NULL,
1115 				 NULL,
1116 				 0,
1117 				 from_qfp->qf_text,
1118 				 from_qfp->qf_lnum,
1119 				 from_qfp->qf_col,
1120 				 from_qfp->qf_viscol,
1121 				 from_qfp->qf_pattern,
1122 				 from_qfp->qf_nr,
1123 				 0,
1124 				 from_qfp->qf_valid) == FAIL)
1125 		{
1126 		    qf_free_all(to);
1127 		    return;
1128 		}
1129 		/*
1130 		 * qf_add_entry() will not set the qf_num field, as the
1131 		 * directory and file names are not supplied. So the qf_fnum
1132 		 * field is copied here.
1133 		 */
1134 		prevp->qf_fnum = from_qfp->qf_fnum; /* file number */
1135 		prevp->qf_type = from_qfp->qf_type; /* error type */
1136 		if (from_qfl->qf_ptr == from_qfp)
1137 		    to_qfl->qf_ptr = prevp;	    /* current location */
1138 	    }
1139 	}
1140 
1141 	to_qfl->qf_index = from_qfl->qf_index;	/* current index in the list */
1142 
1143 	/* When no valid entries are present in the list, qf_ptr points to
1144 	 * the first item in the list */
1145 	if (to_qfl->qf_nonevalid == TRUE)
1146 	    to_qfl->qf_ptr = to_qfl->qf_start;
1147     }
1148 
1149     to->w_llist->qf_curlist = qi->qf_curlist;	/* current list */
1150 }
1151 
1152 /*
1153  * get buffer number for file "dir.name"
1154  */
1155     static int
1156 qf_get_fnum(directory, fname)
1157     char_u   *directory;
1158     char_u   *fname;
1159 {
1160     if (fname == NULL || *fname == NUL)		/* no file name */
1161 	return 0;
1162     {
1163 #ifdef RISCOS
1164 	/* Name is reported as `main.c', but file is `c.main' */
1165 	return ro_buflist_add(fname);
1166 #else
1167 	char_u	    *ptr;
1168 	int	    fnum;
1169 
1170 # ifdef VMS
1171 	vms_remove_version(fname);
1172 # endif
1173 # ifdef BACKSLASH_IN_FILENAME
1174 	if (directory != NULL)
1175 	    slash_adjust(directory);
1176 	slash_adjust(fname);
1177 # endif
1178 	if (directory != NULL && !vim_isAbsName(fname)
1179 		&& (ptr = concat_fnames(directory, fname, TRUE)) != NULL)
1180 	{
1181 	    /*
1182 	     * Here we check if the file really exists.
1183 	     * This should normally be true, but if make works without
1184 	     * "leaving directory"-messages we might have missed a
1185 	     * directory change.
1186 	     */
1187 	    if (mch_getperm(ptr) < 0)
1188 	    {
1189 		vim_free(ptr);
1190 		directory = qf_guess_filepath(fname);
1191 		if (directory)
1192 		    ptr = concat_fnames(directory, fname, TRUE);
1193 		else
1194 		    ptr = vim_strsave(fname);
1195 	    }
1196 	    /* Use concatenated directory name and file name */
1197 	    fnum = buflist_add(ptr, 0);
1198 	    vim_free(ptr);
1199 	    return fnum;
1200 	}
1201 	return buflist_add(fname, 0);
1202 #endif
1203     }
1204 }
1205 
1206 /*
1207  * push dirbuf onto the directory stack and return pointer to actual dir or
1208  * NULL on error
1209  */
1210     static char_u *
1211 qf_push_dir(dirbuf, stackptr)
1212     char_u		*dirbuf;
1213     struct dir_stack_T	**stackptr;
1214 {
1215     struct dir_stack_T  *ds_new;
1216     struct dir_stack_T  *ds_ptr;
1217 
1218     /* allocate new stack element and hook it in */
1219     ds_new = (struct dir_stack_T *)alloc((unsigned)sizeof(struct dir_stack_T));
1220     if (ds_new == NULL)
1221 	return NULL;
1222 
1223     ds_new->next = *stackptr;
1224     *stackptr = ds_new;
1225 
1226     /* store directory on the stack */
1227     if (vim_isAbsName(dirbuf)
1228 	    || (*stackptr)->next == NULL
1229 	    || (*stackptr && dir_stack != *stackptr))
1230 	(*stackptr)->dirname = vim_strsave(dirbuf);
1231     else
1232     {
1233 	/* Okay we don't have an absolute path.
1234 	 * dirbuf must be a subdir of one of the directories on the stack.
1235 	 * Let's search...
1236 	 */
1237 	ds_new = (*stackptr)->next;
1238 	(*stackptr)->dirname = NULL;
1239 	while (ds_new)
1240 	{
1241 	    vim_free((*stackptr)->dirname);
1242 	    (*stackptr)->dirname = concat_fnames(ds_new->dirname, dirbuf,
1243 		    TRUE);
1244 	    if (mch_isdir((*stackptr)->dirname) == TRUE)
1245 		break;
1246 
1247 	    ds_new = ds_new->next;
1248 	}
1249 
1250 	/* clean up all dirs we already left */
1251 	while ((*stackptr)->next != ds_new)
1252 	{
1253 	    ds_ptr = (*stackptr)->next;
1254 	    (*stackptr)->next = (*stackptr)->next->next;
1255 	    vim_free(ds_ptr->dirname);
1256 	    vim_free(ds_ptr);
1257 	}
1258 
1259 	/* Nothing found -> it must be on top level */
1260 	if (ds_new == NULL)
1261 	{
1262 	    vim_free((*stackptr)->dirname);
1263 	    (*stackptr)->dirname = vim_strsave(dirbuf);
1264 	}
1265     }
1266 
1267     if ((*stackptr)->dirname != NULL)
1268 	return (*stackptr)->dirname;
1269     else
1270     {
1271 	ds_ptr = *stackptr;
1272 	*stackptr = (*stackptr)->next;
1273 	vim_free(ds_ptr);
1274 	return NULL;
1275     }
1276 }
1277 
1278 
1279 /*
1280  * pop dirbuf from the directory stack and return previous directory or NULL if
1281  * stack is empty
1282  */
1283     static char_u *
1284 qf_pop_dir(stackptr)
1285     struct dir_stack_T	**stackptr;
1286 {
1287     struct dir_stack_T  *ds_ptr;
1288 
1289     /* TODO: Should we check if dirbuf is the directory on top of the stack?
1290      * What to do if it isn't? */
1291 
1292     /* pop top element and free it */
1293     if (*stackptr != NULL)
1294     {
1295 	ds_ptr = *stackptr;
1296 	*stackptr = (*stackptr)->next;
1297 	vim_free(ds_ptr->dirname);
1298 	vim_free(ds_ptr);
1299     }
1300 
1301     /* return NEW top element as current dir or NULL if stack is empty*/
1302     return *stackptr ? (*stackptr)->dirname : NULL;
1303 }
1304 
1305 /*
1306  * clean up directory stack
1307  */
1308     static void
1309 qf_clean_dir_stack(stackptr)
1310     struct dir_stack_T	**stackptr;
1311 {
1312     struct dir_stack_T  *ds_ptr;
1313 
1314     while ((ds_ptr = *stackptr) != NULL)
1315     {
1316 	*stackptr = (*stackptr)->next;
1317 	vim_free(ds_ptr->dirname);
1318 	vim_free(ds_ptr);
1319     }
1320 }
1321 
1322 /*
1323  * Check in which directory of the directory stack the given file can be
1324  * found.
1325  * Returns a pointer to the directory name or NULL if not found
1326  * Cleans up intermediate directory entries.
1327  *
1328  * TODO: How to solve the following problem?
1329  * If we have the this directory tree:
1330  *     ./
1331  *     ./aa
1332  *     ./aa/bb
1333  *     ./bb
1334  *     ./bb/x.c
1335  * and make says:
1336  *     making all in aa
1337  *     making all in bb
1338  *     x.c:9: Error
1339  * Then qf_push_dir thinks we are in ./aa/bb, but we are in ./bb.
1340  * qf_guess_filepath will return NULL.
1341  */
1342     static char_u *
1343 qf_guess_filepath(filename)
1344     char_u *filename;
1345 {
1346     struct dir_stack_T     *ds_ptr;
1347     struct dir_stack_T     *ds_tmp;
1348     char_u		   *fullname;
1349 
1350     /* no dirs on the stack - there's nothing we can do */
1351     if (dir_stack == NULL)
1352 	return NULL;
1353 
1354     ds_ptr = dir_stack->next;
1355     fullname = NULL;
1356     while (ds_ptr)
1357     {
1358 	vim_free(fullname);
1359 	fullname = concat_fnames(ds_ptr->dirname, filename, TRUE);
1360 
1361 	/* If concat_fnames failed, just go on. The worst thing that can happen
1362 	 * is that we delete the entire stack.
1363 	 */
1364 	if ((fullname != NULL) && (mch_getperm(fullname) >= 0))
1365 	    break;
1366 
1367 	ds_ptr = ds_ptr->next;
1368     }
1369 
1370     vim_free(fullname);
1371 
1372     /* clean up all dirs we already left */
1373     while (dir_stack->next != ds_ptr)
1374     {
1375 	ds_tmp = dir_stack->next;
1376 	dir_stack->next = dir_stack->next->next;
1377 	vim_free(ds_tmp->dirname);
1378 	vim_free(ds_tmp);
1379     }
1380 
1381     return ds_ptr==NULL? NULL: ds_ptr->dirname;
1382 
1383 }
1384 
1385 /*
1386  * jump to a quickfix line
1387  * if dir == FORWARD go "errornr" valid entries forward
1388  * if dir == BACKWARD go "errornr" valid entries backward
1389  * if dir == FORWARD_FILE go "errornr" valid entries files backward
1390  * if dir == BACKWARD_FILE go "errornr" valid entries files backward
1391  * else if "errornr" is zero, redisplay the same line
1392  * else go to entry "errornr"
1393  */
1394     void
1395 qf_jump(qi, dir, errornr, forceit)
1396     qf_info_T	*qi;
1397     int		dir;
1398     int		errornr;
1399     int		forceit;
1400 {
1401     qf_info_T		*ll_ref;
1402     qfline_T		*qf_ptr;
1403     qfline_T		*old_qf_ptr;
1404     int			qf_index;
1405     int			old_qf_fnum;
1406     int			old_qf_index;
1407     int			prev_index;
1408     static char_u	*e_no_more_items = (char_u *)N_("E553: No more items");
1409     char_u		*err = e_no_more_items;
1410     linenr_T		i;
1411     buf_T		*old_curbuf;
1412     linenr_T		old_lnum;
1413     colnr_T		screen_col;
1414     colnr_T		char_col;
1415     char_u		*line;
1416 #ifdef FEAT_WINDOWS
1417     char_u		*old_swb = p_swb;
1418     unsigned		old_swb_flags = swb_flags;
1419     int			opened_window = FALSE;
1420     win_T		*win;
1421     win_T		*altwin;
1422 #endif
1423     int			print_message = TRUE;
1424     int			len;
1425 #ifdef FEAT_FOLDING
1426     int			old_KeyTyped = KeyTyped; /* getting file may reset it */
1427 #endif
1428     int			ok = OK;
1429     int			usable_win;
1430 
1431     if (qi == NULL)
1432 	qi = &ql_info;
1433 
1434     if (qi->qf_curlist >= qi->qf_listcount
1435 	|| qi->qf_lists[qi->qf_curlist].qf_count == 0)
1436     {
1437 	EMSG(_(e_quickfix));
1438 	return;
1439     }
1440 
1441     qf_ptr = qi->qf_lists[qi->qf_curlist].qf_ptr;
1442     old_qf_ptr = qf_ptr;
1443     qf_index = qi->qf_lists[qi->qf_curlist].qf_index;
1444     old_qf_index = qf_index;
1445     if (dir == FORWARD || dir == FORWARD_FILE)	    /* next valid entry */
1446     {
1447 	while (errornr--)
1448 	{
1449 	    old_qf_ptr = qf_ptr;
1450 	    prev_index = qf_index;
1451 	    old_qf_fnum = qf_ptr->qf_fnum;
1452 	    do
1453 	    {
1454 		if (qf_index == qi->qf_lists[qi->qf_curlist].qf_count
1455 						   || qf_ptr->qf_next == NULL)
1456 		{
1457 		    qf_ptr = old_qf_ptr;
1458 		    qf_index = prev_index;
1459 		    if (err != NULL)
1460 		    {
1461 			EMSG(_(err));
1462 			goto theend;
1463 		    }
1464 		    errornr = 0;
1465 		    break;
1466 		}
1467 		++qf_index;
1468 		qf_ptr = qf_ptr->qf_next;
1469 	    } while ((!qi->qf_lists[qi->qf_curlist].qf_nonevalid
1470 		      && !qf_ptr->qf_valid)
1471 		  || (dir == FORWARD_FILE && qf_ptr->qf_fnum == old_qf_fnum));
1472 	    err = NULL;
1473 	}
1474     }
1475     else if (dir == BACKWARD || dir == BACKWARD_FILE)  /* prev. valid entry */
1476     {
1477 	while (errornr--)
1478 	{
1479 	    old_qf_ptr = qf_ptr;
1480 	    prev_index = qf_index;
1481 	    old_qf_fnum = qf_ptr->qf_fnum;
1482 	    do
1483 	    {
1484 		if (qf_index == 1 || qf_ptr->qf_prev == NULL)
1485 		{
1486 		    qf_ptr = old_qf_ptr;
1487 		    qf_index = prev_index;
1488 		    if (err != NULL)
1489 		    {
1490 			EMSG(_(err));
1491 			goto theend;
1492 		    }
1493 		    errornr = 0;
1494 		    break;
1495 		}
1496 		--qf_index;
1497 		qf_ptr = qf_ptr->qf_prev;
1498 	    } while ((!qi->qf_lists[qi->qf_curlist].qf_nonevalid
1499 		      && !qf_ptr->qf_valid)
1500 		  || (dir == BACKWARD_FILE && qf_ptr->qf_fnum == old_qf_fnum));
1501 	    err = NULL;
1502 	}
1503     }
1504     else if (errornr != 0)	/* go to specified number */
1505     {
1506 	while (errornr < qf_index && qf_index > 1 && qf_ptr->qf_prev != NULL)
1507 	{
1508 	    --qf_index;
1509 	    qf_ptr = qf_ptr->qf_prev;
1510 	}
1511 	while (errornr > qf_index && qf_index <
1512 				    qi->qf_lists[qi->qf_curlist].qf_count
1513 						   && qf_ptr->qf_next != NULL)
1514 	{
1515 	    ++qf_index;
1516 	    qf_ptr = qf_ptr->qf_next;
1517 	}
1518     }
1519 
1520 #ifdef FEAT_WINDOWS
1521     qi->qf_lists[qi->qf_curlist].qf_index = qf_index;
1522     if (qf_win_pos_update(qi, old_qf_index))
1523 	/* No need to print the error message if it's visible in the error
1524 	 * window */
1525 	print_message = FALSE;
1526 
1527     /*
1528      * For ":helpgrep" find a help window or open one.
1529      */
1530     if (qf_ptr->qf_type == 1 && (!curwin->w_buffer->b_help || cmdmod.tab != 0))
1531     {
1532 	win_T	*wp;
1533 	int	n;
1534 
1535 	if (cmdmod.tab != 0)
1536 	    wp = NULL;
1537 	else
1538 	    for (wp = firstwin; wp != NULL; wp = wp->w_next)
1539 		if (wp->w_buffer != NULL && wp->w_buffer->b_help)
1540 		    break;
1541 	if (wp != NULL && wp->w_buffer->b_nwindows > 0)
1542 	    win_enter(wp, TRUE);
1543 	else
1544 	{
1545 	    /*
1546 	     * Split off help window; put it at far top if no position
1547 	     * specified, the current window is vertically split and narrow.
1548 	     */
1549 	    n = WSP_HELP;
1550 # ifdef FEAT_VERTSPLIT
1551 	    if (cmdmod.split == 0 && curwin->w_width != Columns
1552 						      && curwin->w_width < 80)
1553 		n |= WSP_TOP;
1554 # endif
1555 	    if (win_split(0, n) == FAIL)
1556 		goto theend;
1557 	    opened_window = TRUE;	/* close it when fail */
1558 
1559 	    if (curwin->w_height < p_hh)
1560 		win_setheight((int)p_hh);
1561 
1562 	    if (qi != &ql_info)	    /* not a quickfix list */
1563 	    {
1564 		/* The new window should use the supplied location list */
1565 		qf_free_all(curwin);
1566 		curwin->w_llist = qi;
1567 		qi->qf_refcount++;
1568 	    }
1569 	}
1570 
1571 	if (!p_im)
1572 	    restart_edit = 0;	    /* don't want insert mode in help file */
1573     }
1574 
1575     /*
1576      * If currently in the quickfix window, find another window to show the
1577      * file in.
1578      */
1579     if (bt_quickfix(curbuf) && !opened_window)
1580     {
1581 	/*
1582 	 * If there is no file specified, we don't know where to go.
1583 	 * But do advance, otherwise ":cn" gets stuck.
1584 	 */
1585 	if (qf_ptr->qf_fnum == 0)
1586 	    goto theend;
1587 
1588 	/* Locate a window showing a normal buffer */
1589 	usable_win = 0;
1590 	FOR_ALL_WINDOWS(win)
1591 	    if (win->w_buffer->b_p_bt[0] == NUL)
1592 	    {
1593 		usable_win = 1;
1594 		break;
1595 	    }
1596 
1597 	/*
1598 	 * If no usable window is found and 'switchbuf' contains "usetab"
1599 	 * then search in other tabs.
1600 	 */
1601 	if (!usable_win && (swb_flags & SWB_USETAB))
1602 	{
1603 	    tabpage_T	*tp;
1604 	    win_T	*wp;
1605 
1606 	    FOR_ALL_TAB_WINDOWS(tp, wp)
1607 	    {
1608 		if (wp->w_buffer->b_fnum == qf_ptr->qf_fnum)
1609 		{
1610 		    goto_tabpage_win(tp, wp);
1611 		    usable_win = 1;
1612 		    break;
1613 		}
1614 	    }
1615 	}
1616 
1617 	/*
1618 	 * If there is only one window and it is the quickfix window, create a
1619 	 * new one above the quickfix window.
1620 	 */
1621 	if (((firstwin == lastwin) && bt_quickfix(curbuf)) || !usable_win)
1622 	{
1623 	    ll_ref = curwin->w_llist_ref;
1624 
1625 	    if (win_split(0, WSP_ABOVE) == FAIL)
1626 		goto failed;		/* not enough room for window */
1627 	    opened_window = TRUE;	/* close it when fail */
1628 	    p_swb = empty_option;	/* don't split again */
1629 	    swb_flags = 0;
1630 # ifdef FEAT_SCROLLBIND
1631 	    curwin->w_p_scb = FALSE;
1632 # endif
1633 	    if (ll_ref != NULL)
1634 	    {
1635 		/* The new window should use the location list from the
1636 		 * location list window */
1637 		qf_free_all(curwin);
1638 		curwin->w_llist = ll_ref;
1639 		ll_ref->qf_refcount++;
1640 	    }
1641 	}
1642 	else
1643 	{
1644 	    if (curwin->w_llist_ref != NULL)
1645 	    {
1646 		/* In a location window */
1647 		ll_ref = curwin->w_llist_ref;
1648 
1649 		/* Find the window with the same location list */
1650 		FOR_ALL_WINDOWS(win)
1651 		    if (win->w_llist == ll_ref)
1652 			break;
1653 		if (win == NULL)
1654 		{
1655 		    /* Find the window showing the selected file */
1656 		    FOR_ALL_WINDOWS(win)
1657 			if (win->w_buffer->b_fnum == qf_ptr->qf_fnum)
1658 			    break;
1659 		    if (win == NULL)
1660 		    {
1661 			/* Find a previous usable window */
1662 			win = curwin;
1663 			do
1664 			{
1665 			    if (win->w_buffer->b_p_bt[0] == NUL)
1666 				break;
1667 			    if (win->w_prev == NULL)
1668 				win = lastwin;	/* wrap around the top */
1669 			    else
1670 				win = win->w_prev; /* go to previous window */
1671 			} while (win != curwin);
1672 		    }
1673 		}
1674 		win_goto(win);
1675 
1676 		/* If the location list for the window is not set, then set it
1677 		 * to the location list from the location window */
1678 		if (win->w_llist == NULL)
1679 		{
1680 		    win->w_llist = ll_ref;
1681 		    ll_ref->qf_refcount++;
1682 		}
1683 	    }
1684 	    else
1685 	    {
1686 
1687 	    /*
1688 	     * Try to find a window that shows the right buffer.
1689 	     * Default to the window just above the quickfix buffer.
1690 	     */
1691 	    win = curwin;
1692 	    altwin = NULL;
1693 	    for (;;)
1694 	    {
1695 		if (win->w_buffer->b_fnum == qf_ptr->qf_fnum)
1696 		    break;
1697 		if (win->w_prev == NULL)
1698 		    win = lastwin;	/* wrap around the top */
1699 		else
1700 		    win = win->w_prev;	/* go to previous window */
1701 
1702 		if (IS_QF_WINDOW(win))
1703 		{
1704 		    /* Didn't find it, go to the window before the quickfix
1705 		     * window. */
1706 		    if (altwin != NULL)
1707 			win = altwin;
1708 		    else if (curwin->w_prev != NULL)
1709 			win = curwin->w_prev;
1710 		    else
1711 			win = curwin->w_next;
1712 		    break;
1713 		}
1714 
1715 		/* Remember a usable window. */
1716 		if (altwin == NULL && !win->w_p_pvw
1717 					   && win->w_buffer->b_p_bt[0] == NUL)
1718 		    altwin = win;
1719 	    }
1720 
1721 	    win_goto(win);
1722 	    }
1723 	}
1724     }
1725 #endif
1726 
1727     /*
1728      * If there is a file name,
1729      * read the wanted file if needed, and check autowrite etc.
1730      */
1731     old_curbuf = curbuf;
1732     old_lnum = curwin->w_cursor.lnum;
1733 
1734     if (qf_ptr->qf_fnum != 0)
1735     {
1736 	if (qf_ptr->qf_type == 1)
1737 	{
1738 	    /* Open help file (do_ecmd() will set b_help flag, readfile() will
1739 	     * set b_p_ro flag). */
1740 	    if (!can_abandon(curbuf, forceit))
1741 	    {
1742 		EMSG(_(e_nowrtmsg));
1743 		ok = FALSE;
1744 	    }
1745 	    else
1746 		ok = do_ecmd(qf_ptr->qf_fnum, NULL, NULL, NULL, (linenr_T)1,
1747 						   ECMD_HIDE + ECMD_SET_HELP);
1748 	}
1749 	else
1750 	    ok = buflist_getfile(qf_ptr->qf_fnum,
1751 			    (linenr_T)1, GETF_SETMARK | GETF_SWITCH, forceit);
1752     }
1753 
1754     if (ok == OK)
1755     {
1756 	/* When not switched to another buffer, still need to set pc mark */
1757 	if (curbuf == old_curbuf)
1758 	    setpcmark();
1759 
1760 	if (qf_ptr->qf_pattern == NULL)
1761 	{
1762 	    /*
1763 	     * Go to line with error, unless qf_lnum is 0.
1764 	     */
1765 	    i = qf_ptr->qf_lnum;
1766 	    if (i > 0)
1767 	    {
1768 		if (i > curbuf->b_ml.ml_line_count)
1769 		    i = curbuf->b_ml.ml_line_count;
1770 		curwin->w_cursor.lnum = i;
1771 	    }
1772 	    if (qf_ptr->qf_col > 0)
1773 	    {
1774 		curwin->w_cursor.col = qf_ptr->qf_col - 1;
1775 		if (qf_ptr->qf_viscol == TRUE)
1776 		{
1777 		    /*
1778 		     * Check each character from the beginning of the error
1779 		     * line up to the error column.  For each tab character
1780 		     * found, reduce the error column value by the length of
1781 		     * a tab character.
1782 		     */
1783 		    line = ml_get_curline();
1784 		    screen_col = 0;
1785 		    for (char_col = 0; char_col < curwin->w_cursor.col; ++char_col)
1786 		    {
1787 			if (*line == NUL)
1788 			    break;
1789 			if (*line++ == '\t')
1790 			{
1791 			    curwin->w_cursor.col -= 7 - (screen_col % 8);
1792 			    screen_col += 8 - (screen_col % 8);
1793 			}
1794 			else
1795 			    ++screen_col;
1796 		    }
1797 		}
1798 		check_cursor();
1799 	    }
1800 	    else
1801 		beginline(BL_WHITE | BL_FIX);
1802 	}
1803 	else
1804 	{
1805 	    pos_T save_cursor;
1806 
1807 	    /* Move the cursor to the first line in the buffer */
1808 	    save_cursor = curwin->w_cursor;
1809 	    curwin->w_cursor.lnum = 0;
1810 	    if (!do_search(NULL, '/', qf_ptr->qf_pattern, (long)1,
1811 							   SEARCH_KEEP, NULL))
1812 		curwin->w_cursor = save_cursor;
1813 	}
1814 
1815 #ifdef FEAT_FOLDING
1816 	if ((fdo_flags & FDO_QUICKFIX) && old_KeyTyped)
1817 	    foldOpenCursor();
1818 #endif
1819 	if (print_message)
1820 	{
1821 	    /* Update the screen before showing the message */
1822 	    update_topline_redraw();
1823 	    sprintf((char *)IObuff, _("(%d of %d)%s%s: "), qf_index,
1824 		    qi->qf_lists[qi->qf_curlist].qf_count,
1825 		    qf_ptr->qf_cleared ? _(" (line deleted)") : "",
1826 		    (char *)qf_types(qf_ptr->qf_type, qf_ptr->qf_nr));
1827 	    /* Add the message, skipping leading whitespace and newlines. */
1828 	    len = (int)STRLEN(IObuff);
1829 	    qf_fmt_text(skipwhite(qf_ptr->qf_text), IObuff + len, IOSIZE - len);
1830 
1831 	    /* Output the message.  Overwrite to avoid scrolling when the 'O'
1832 	     * flag is present in 'shortmess'; But when not jumping, print the
1833 	     * whole message. */
1834 	    i = msg_scroll;
1835 	    if (curbuf == old_curbuf && curwin->w_cursor.lnum == old_lnum)
1836 		msg_scroll = TRUE;
1837 	    else if (!msg_scrolled && shortmess(SHM_OVERALL))
1838 		msg_scroll = FALSE;
1839 	    msg_attr_keep(IObuff, 0, TRUE);
1840 	    msg_scroll = i;
1841 	}
1842     }
1843     else
1844     {
1845 #ifdef FEAT_WINDOWS
1846 	if (opened_window)
1847 	    win_close(curwin, TRUE);    /* Close opened window */
1848 #endif
1849 	if (qf_ptr->qf_fnum != 0)
1850 	{
1851 	    /*
1852 	     * Couldn't open file, so put index back where it was.  This could
1853 	     * happen if the file was readonly and we changed something.
1854 	     */
1855 #ifdef FEAT_WINDOWS
1856 failed:
1857 #endif
1858 	    qf_ptr = old_qf_ptr;
1859 	    qf_index = old_qf_index;
1860 	}
1861     }
1862 theend:
1863     qi->qf_lists[qi->qf_curlist].qf_ptr = qf_ptr;
1864     qi->qf_lists[qi->qf_curlist].qf_index = qf_index;
1865 #ifdef FEAT_WINDOWS
1866     if (p_swb != old_swb && opened_window)
1867     {
1868 	/* Restore old 'switchbuf' value, but not when an autocommand or
1869 	 * modeline has changed the value. */
1870 	if (p_swb == empty_option)
1871 	{
1872 	    p_swb = old_swb;
1873 	    swb_flags = old_swb_flags;
1874 	}
1875 	else
1876 	    free_string_option(old_swb);
1877     }
1878 #endif
1879 }
1880 
1881 /*
1882  * ":clist": list all errors
1883  * ":llist": list all locations
1884  */
1885     void
1886 qf_list(eap)
1887     exarg_T	*eap;
1888 {
1889     buf_T	*buf;
1890     char_u	*fname;
1891     qfline_T	*qfp;
1892     int		i;
1893     int		idx1 = 1;
1894     int		idx2 = -1;
1895     int		need_return = TRUE;
1896     char_u	*arg = eap->arg;
1897     int		all = eap->forceit;	/* if not :cl!, only show
1898 						   recognised errors */
1899     qf_info_T	*qi = &ql_info;
1900 
1901     if (eap->cmdidx == CMD_llist)
1902     {
1903 	qi = GET_LOC_LIST(curwin);
1904 	if (qi == NULL)
1905 	{
1906 	    EMSG(_(e_loclist));
1907 	    return;
1908 	}
1909     }
1910 
1911     if (qi->qf_curlist >= qi->qf_listcount
1912 	|| qi->qf_lists[qi->qf_curlist].qf_count == 0)
1913     {
1914 	EMSG(_(e_quickfix));
1915 	return;
1916     }
1917     if (!get_list_range(&arg, &idx1, &idx2) || *arg != NUL)
1918     {
1919 	EMSG(_(e_trailing));
1920 	return;
1921     }
1922     i = qi->qf_lists[qi->qf_curlist].qf_count;
1923     if (idx1 < 0)
1924 	idx1 = (-idx1 > i) ? 0 : idx1 + i + 1;
1925     if (idx2 < 0)
1926 	idx2 = (-idx2 > i) ? 0 : idx2 + i + 1;
1927 
1928     if (qi->qf_lists[qi->qf_curlist].qf_nonevalid)
1929 	all = TRUE;
1930     qfp = qi->qf_lists[qi->qf_curlist].qf_start;
1931     for (i = 1; !got_int && i <= qi->qf_lists[qi->qf_curlist].qf_count; )
1932     {
1933 	if ((qfp->qf_valid || all) && idx1 <= i && i <= idx2)
1934 	{
1935 	    if (need_return)
1936 	    {
1937 		msg_putchar('\n');
1938 		if (got_int)
1939 		    break;
1940 		need_return = FALSE;
1941 	    }
1942 
1943 	    fname = NULL;
1944 	    if (qfp->qf_fnum != 0
1945 			      && (buf = buflist_findnr(qfp->qf_fnum)) != NULL)
1946 	    {
1947 		fname = buf->b_fname;
1948 		if (qfp->qf_type == 1)	/* :helpgrep */
1949 		    fname = gettail(fname);
1950 	    }
1951 	    if (fname == NULL)
1952 		sprintf((char *)IObuff, "%2d", i);
1953 	    else
1954 		vim_snprintf((char *)IObuff, IOSIZE, "%2d %s",
1955 							    i, (char *)fname);
1956 	    msg_outtrans_attr(IObuff, i == qi->qf_lists[qi->qf_curlist].qf_index
1957 					   ? hl_attr(HLF_L) : hl_attr(HLF_D));
1958 	    if (qfp->qf_lnum == 0)
1959 		IObuff[0] = NUL;
1960 	    else if (qfp->qf_col == 0)
1961 		sprintf((char *)IObuff, ":%ld", qfp->qf_lnum);
1962 	    else
1963 		sprintf((char *)IObuff, ":%ld col %d",
1964 						   qfp->qf_lnum, qfp->qf_col);
1965 	    sprintf((char *)IObuff + STRLEN(IObuff), "%s:",
1966 				  (char *)qf_types(qfp->qf_type, qfp->qf_nr));
1967 	    msg_puts_attr(IObuff, hl_attr(HLF_N));
1968 	    if (qfp->qf_pattern != NULL)
1969 	    {
1970 		qf_fmt_text(qfp->qf_pattern, IObuff, IOSIZE);
1971 		STRCAT(IObuff, ":");
1972 		msg_puts(IObuff);
1973 	    }
1974 	    msg_puts((char_u *)" ");
1975 
1976 	    /* Remove newlines and leading whitespace from the text.  For an
1977 	     * unrecognized line keep the indent, the compiler may mark a word
1978 	     * with ^^^^. */
1979 	    qf_fmt_text((fname != NULL || qfp->qf_lnum != 0)
1980 				     ? skipwhite(qfp->qf_text) : qfp->qf_text,
1981 							      IObuff, IOSIZE);
1982 	    msg_prt_line(IObuff, FALSE);
1983 	    out_flush();		/* show one line at a time */
1984 	    need_return = TRUE;
1985 	}
1986 
1987 	qfp = qfp->qf_next;
1988 	++i;
1989 	ui_breakcheck();
1990     }
1991 }
1992 
1993 /*
1994  * Remove newlines and leading whitespace from an error message.
1995  * Put the result in "buf[bufsize]".
1996  */
1997     static void
1998 qf_fmt_text(text, buf, bufsize)
1999     char_u	*text;
2000     char_u	*buf;
2001     int		bufsize;
2002 {
2003     int		i;
2004     char_u	*p = text;
2005 
2006     for (i = 0; *p != NUL && i < bufsize - 1; ++i)
2007     {
2008 	if (*p == '\n')
2009 	{
2010 	    buf[i] = ' ';
2011 	    while (*++p != NUL)
2012 		if (!vim_iswhite(*p) && *p != '\n')
2013 		    break;
2014 	}
2015 	else
2016 	    buf[i] = *p++;
2017     }
2018     buf[i] = NUL;
2019 }
2020 
2021 /*
2022  * ":colder [count]": Up in the quickfix stack.
2023  * ":cnewer [count]": Down in the quickfix stack.
2024  * ":lolder [count]": Up in the location list stack.
2025  * ":lnewer [count]": Down in the location list stack.
2026  */
2027     void
2028 qf_age(eap)
2029     exarg_T	*eap;
2030 {
2031     qf_info_T	*qi = &ql_info;
2032     int		count;
2033 
2034     if (eap->cmdidx == CMD_lolder || eap->cmdidx == CMD_lnewer)
2035     {
2036 	qi = GET_LOC_LIST(curwin);
2037 	if (qi == NULL)
2038 	{
2039 	    EMSG(_(e_loclist));
2040 	    return;
2041 	}
2042     }
2043 
2044     if (eap->addr_count != 0)
2045 	count = eap->line2;
2046     else
2047 	count = 1;
2048     while (count--)
2049     {
2050 	if (eap->cmdidx == CMD_colder || eap->cmdidx == CMD_lolder)
2051 	{
2052 	    if (qi->qf_curlist == 0)
2053 	    {
2054 		EMSG(_("E380: At bottom of quickfix stack"));
2055 		return;
2056 	    }
2057 	    --qi->qf_curlist;
2058 	}
2059 	else
2060 	{
2061 	    if (qi->qf_curlist >= qi->qf_listcount - 1)
2062 	    {
2063 		EMSG(_("E381: At top of quickfix stack"));
2064 		return;
2065 	    }
2066 	    ++qi->qf_curlist;
2067 	}
2068     }
2069     qf_msg(qi);
2070 
2071 }
2072 
2073     static void
2074 qf_msg(qi)
2075     qf_info_T	*qi;
2076 {
2077     smsg((char_u *)_("error list %d of %d; %d errors"),
2078 	    qi->qf_curlist + 1, qi->qf_listcount,
2079 	    qi->qf_lists[qi->qf_curlist].qf_count);
2080 #ifdef FEAT_WINDOWS
2081     qf_update_buffer(qi);
2082 #endif
2083 }
2084 
2085 /*
2086  * Free error list "idx".
2087  */
2088     static void
2089 qf_free(qi, idx)
2090     qf_info_T	*qi;
2091     int		idx;
2092 {
2093     qfline_T	*qfp;
2094 
2095     while (qi->qf_lists[idx].qf_count)
2096     {
2097 	qfp = qi->qf_lists[idx].qf_start->qf_next;
2098 	vim_free(qi->qf_lists[idx].qf_start->qf_text);
2099 	vim_free(qi->qf_lists[idx].qf_start->qf_pattern);
2100 	vim_free(qi->qf_lists[idx].qf_start);
2101 	qi->qf_lists[idx].qf_start = qfp;
2102 	--qi->qf_lists[idx].qf_count;
2103     }
2104 }
2105 
2106 /*
2107  * qf_mark_adjust: adjust marks
2108  */
2109    void
2110 qf_mark_adjust(wp, line1, line2, amount, amount_after)
2111     win_T	*wp;
2112     linenr_T	line1;
2113     linenr_T	line2;
2114     long	amount;
2115     long	amount_after;
2116 {
2117     int		i;
2118     qfline_T	*qfp;
2119     int		idx;
2120     qf_info_T	*qi = &ql_info;
2121 
2122     if (wp != NULL)
2123     {
2124 	if (wp->w_llist == NULL)
2125 	    return;
2126 	qi = wp->w_llist;
2127     }
2128 
2129     for (idx = 0; idx < qi->qf_listcount; ++idx)
2130 	if (qi->qf_lists[idx].qf_count)
2131 	    for (i = 0, qfp = qi->qf_lists[idx].qf_start;
2132 		       i < qi->qf_lists[idx].qf_count; ++i, qfp = qfp->qf_next)
2133 		if (qfp->qf_fnum == curbuf->b_fnum)
2134 		{
2135 		    if (qfp->qf_lnum >= line1 && qfp->qf_lnum <= line2)
2136 		    {
2137 			if (amount == MAXLNUM)
2138 			    qfp->qf_cleared = TRUE;
2139 			else
2140 			    qfp->qf_lnum += amount;
2141 		    }
2142 		    else if (amount_after && qfp->qf_lnum > line2)
2143 			qfp->qf_lnum += amount_after;
2144 		}
2145 }
2146 
2147 /*
2148  * Make a nice message out of the error character and the error number:
2149  *  char    number	message
2150  *  e or E    0		" error"
2151  *  w or W    0		" warning"
2152  *  i or I    0		" info"
2153  *  0	      0		""
2154  *  other     0		" c"
2155  *  e or E    n		" error n"
2156  *  w or W    n		" warning n"
2157  *  i or I    n		" info n"
2158  *  0	      n		" error n"
2159  *  other     n		" c n"
2160  *  1	      x		""	:helpgrep
2161  */
2162     static char_u *
2163 qf_types(c, nr)
2164     int c, nr;
2165 {
2166     static char_u	buf[20];
2167     static char_u	cc[3];
2168     char_u		*p;
2169 
2170     if (c == 'W' || c == 'w')
2171 	p = (char_u *)" warning";
2172     else if (c == 'I' || c == 'i')
2173 	p = (char_u *)" info";
2174     else if (c == 'E' || c == 'e' || (c == 0 && nr > 0))
2175 	p = (char_u *)" error";
2176     else if (c == 0 || c == 1)
2177 	p = (char_u *)"";
2178     else
2179     {
2180 	cc[0] = ' ';
2181 	cc[1] = c;
2182 	cc[2] = NUL;
2183 	p = cc;
2184     }
2185 
2186     if (nr <= 0)
2187 	return p;
2188 
2189     sprintf((char *)buf, "%s %3d", (char *)p, nr);
2190     return buf;
2191 }
2192 
2193 #if defined(FEAT_WINDOWS) || defined(PROTO)
2194 /*
2195  * ":cwindow": open the quickfix window if we have errors to display,
2196  *	       close it if not.
2197  * ":lwindow": open the location list window if we have locations to display,
2198  *	       close it if not.
2199  */
2200     void
2201 ex_cwindow(eap)
2202     exarg_T	*eap;
2203 {
2204     qf_info_T	*qi = &ql_info;
2205     win_T	*win;
2206 
2207     if (eap->cmdidx == CMD_lwindow)
2208     {
2209 	qi = GET_LOC_LIST(curwin);
2210 	if (qi == NULL)
2211 	    return;
2212     }
2213 
2214     /* Look for an existing quickfix window.  */
2215     win = qf_find_win(qi);
2216 
2217     /*
2218      * If a quickfix window is open but we have no errors to display,
2219      * close the window.  If a quickfix window is not open, then open
2220      * it if we have errors; otherwise, leave it closed.
2221      */
2222     if (qi->qf_lists[qi->qf_curlist].qf_nonevalid
2223 	    || qi->qf_curlist >= qi->qf_listcount)
2224     {
2225 	if (win != NULL)
2226 	    ex_cclose(eap);
2227     }
2228     else if (win == NULL)
2229 	ex_copen(eap);
2230 }
2231 
2232 /*
2233  * ":cclose": close the window showing the list of errors.
2234  * ":lclose": close the window showing the location list
2235  */
2236 /*ARGSUSED*/
2237     void
2238 ex_cclose(eap)
2239     exarg_T	*eap;
2240 {
2241     win_T	*win = NULL;
2242     qf_info_T	*qi = &ql_info;
2243 
2244     if (eap->cmdidx == CMD_lclose || eap->cmdidx == CMD_lwindow)
2245     {
2246 	qi = GET_LOC_LIST(curwin);
2247 	if (qi == NULL)
2248 	    return;
2249     }
2250 
2251     /* Find existing quickfix window and close it. */
2252     win = qf_find_win(qi);
2253     if (win != NULL)
2254 	win_close(win, FALSE);
2255 }
2256 
2257 /*
2258  * ":copen": open a window that shows the list of errors.
2259  * ":lopen": open a window that shows the location list.
2260  */
2261     void
2262 ex_copen(eap)
2263     exarg_T	*eap;
2264 {
2265     qf_info_T	*qi = &ql_info;
2266     int		height;
2267     win_T	*win;
2268     tabpage_T	*prevtab = curtab;
2269     buf_T	*qf_buf;
2270 
2271     if (eap->cmdidx == CMD_lopen || eap->cmdidx == CMD_lwindow)
2272     {
2273 	qi = GET_LOC_LIST(curwin);
2274 	if (qi == NULL)
2275 	{
2276 	    EMSG(_(e_loclist));
2277 	    return;
2278 	}
2279     }
2280 
2281     if (eap->addr_count != 0)
2282 	height = eap->line2;
2283     else
2284 	height = QF_WINHEIGHT;
2285 
2286 #ifdef FEAT_VISUAL
2287     reset_VIsual_and_resel();			/* stop Visual mode */
2288 #endif
2289 #ifdef FEAT_GUI
2290     need_mouse_correct = TRUE;
2291 #endif
2292 
2293     /*
2294      * Find existing quickfix window, or open a new one.
2295      */
2296     win = qf_find_win(qi);
2297 
2298     if (win != NULL && cmdmod.tab == 0)
2299 	win_goto(win);
2300     else
2301     {
2302 	qf_buf = qf_find_buf(qi);
2303 
2304 	/* The current window becomes the previous window afterwards. */
2305 	win = curwin;
2306 
2307 	if (eap->cmdidx == CMD_copen || eap->cmdidx == CMD_cwindow)
2308 	    /* Create the new window at the very bottom. */
2309 	    win_goto(lastwin);
2310 	if (win_split(height, WSP_BELOW) == FAIL)
2311 	    return;		/* not enough room for window */
2312 #ifdef FEAT_SCROLLBIND
2313 	curwin->w_p_scb = FALSE;
2314 #endif
2315 
2316 	/* Remove the location list for the quickfix window */
2317 	qf_free_all(curwin);
2318 
2319 	if (eap->cmdidx == CMD_lopen || eap->cmdidx == CMD_lwindow)
2320 	{
2321 	    /*
2322 	     * For the location list window, create a reference to the
2323 	     * location list from the window 'win'.
2324 	     */
2325 	    curwin->w_llist_ref = win->w_llist;
2326 	    win->w_llist->qf_refcount++;
2327 	}
2328 
2329 	if (qf_buf != NULL)
2330 	    /* Use the existing quickfix buffer */
2331 	    (void)do_ecmd(qf_buf->b_fnum, NULL, NULL, NULL, ECMD_ONE,
2332 						     ECMD_HIDE + ECMD_OLDBUF);
2333 	else
2334 	{
2335 	    /* Create a new quickfix buffer */
2336 	    (void)do_ecmd(0, NULL, NULL, NULL, ECMD_ONE, ECMD_HIDE);
2337 	    /* switch off 'swapfile' */
2338 	    set_option_value((char_u *)"swf", 0L, NULL, OPT_LOCAL);
2339 	    set_option_value((char_u *)"bt", 0L, (char_u *)"quickfix",
2340 								   OPT_LOCAL);
2341 	    set_option_value((char_u *)"bh", 0L, (char_u *)"wipe", OPT_LOCAL);
2342 	    set_option_value((char_u *)"diff", 0L, NULL, OPT_LOCAL);
2343 	}
2344 
2345 	/* Only set the height when still in the same tab page and there is no
2346 	 * window to the side. */
2347 	if (curtab == prevtab
2348 #ifdef FEAT_VERTSPLIT
2349 		&& curwin->w_width == Columns
2350 #endif
2351 	   )
2352 	    win_setheight(height);
2353 	curwin->w_p_wfh = TRUE;	    /* set 'winfixheight' */
2354 	if (win_valid(win))
2355 	    prevwin = win;
2356     }
2357 
2358     /*
2359      * Fill the buffer with the quickfix list.
2360      */
2361     qf_fill_buffer(qi);
2362 
2363     curwin->w_cursor.lnum = qi->qf_lists[qi->qf_curlist].qf_index;
2364     curwin->w_cursor.col = 0;
2365     check_cursor();
2366     update_topline();		/* scroll to show the line */
2367 }
2368 
2369 /*
2370  * Return the number of the current entry (line number in the quickfix
2371  * window).
2372  */
2373      linenr_T
2374 qf_current_entry(wp)
2375     win_T	*wp;
2376 {
2377     qf_info_T	*qi = &ql_info;
2378 
2379     if (IS_LL_WINDOW(wp))
2380 	/* In the location list window, use the referenced location list */
2381 	qi = wp->w_llist_ref;
2382 
2383     return qi->qf_lists[qi->qf_curlist].qf_index;
2384 }
2385 
2386 /*
2387  * Update the cursor position in the quickfix window to the current error.
2388  * Return TRUE if there is a quickfix window.
2389  */
2390     static int
2391 qf_win_pos_update(qi, old_qf_index)
2392     qf_info_T	*qi;
2393     int		old_qf_index;	/* previous qf_index or zero */
2394 {
2395     win_T	*win;
2396     int		qf_index = qi->qf_lists[qi->qf_curlist].qf_index;
2397 
2398     /*
2399      * Put the cursor on the current error in the quickfix window, so that
2400      * it's viewable.
2401      */
2402     win = qf_find_win(qi);
2403     if (win != NULL
2404 	    && qf_index <= win->w_buffer->b_ml.ml_line_count
2405 	    && old_qf_index != qf_index)
2406     {
2407 	win_T	*old_curwin = curwin;
2408 
2409 	curwin = win;
2410 	curbuf = win->w_buffer;
2411 	if (qf_index > old_qf_index)
2412 	{
2413 	    curwin->w_redraw_top = old_qf_index;
2414 	    curwin->w_redraw_bot = qf_index;
2415 	}
2416 	else
2417 	{
2418 	    curwin->w_redraw_top = qf_index;
2419 	    curwin->w_redraw_bot = old_qf_index;
2420 	}
2421 	curwin->w_cursor.lnum = qf_index;
2422 	curwin->w_cursor.col = 0;
2423 	update_topline();		/* scroll to show the line */
2424 	redraw_later(VALID);
2425 	curwin->w_redr_status = TRUE;	/* update ruler */
2426 	curwin = old_curwin;
2427 	curbuf = curwin->w_buffer;
2428     }
2429     return win != NULL;
2430 }
2431 
2432 /*
2433  * Check whether the given window is displaying the specified quickfix/location
2434  * list buffer
2435  */
2436     static int
2437 is_qf_win(win, qi)
2438     win_T	*win;
2439     qf_info_T	*qi;
2440 {
2441     /*
2442      * A window displaying the quickfix buffer will have the w_llist_ref field
2443      * set to NULL.
2444      * A window displaying a location list buffer will have the w_llist_ref
2445      * pointing to the location list.
2446      */
2447     if (bt_quickfix(win->w_buffer))
2448 	if ((qi == &ql_info && win->w_llist_ref == NULL)
2449 		|| (qi != &ql_info && win->w_llist_ref == qi))
2450 	    return TRUE;
2451 
2452     return FALSE;
2453 }
2454 
2455 /*
2456  * Find a window displaying the quickfix/location list 'qi'
2457  * Searches in only the windows opened in the current tab.
2458  */
2459     static win_T *
2460 qf_find_win(qi)
2461     qf_info_T	*qi;
2462 {
2463     win_T	*win;
2464 
2465     FOR_ALL_WINDOWS(win)
2466 	if (is_qf_win(win, qi))
2467 	    break;
2468 
2469     return win;
2470 }
2471 
2472 /*
2473  * Find a quickfix buffer.
2474  * Searches in windows opened in all the tabs.
2475  */
2476     static buf_T *
2477 qf_find_buf(qi)
2478     qf_info_T	*qi;
2479 {
2480     tabpage_T	*tp;
2481     win_T	*win;
2482 
2483     FOR_ALL_TAB_WINDOWS(tp, win)
2484 	if (is_qf_win(win, qi))
2485 	    return win->w_buffer;
2486 
2487     return NULL;
2488 }
2489 
2490 /*
2491  * Find the quickfix buffer.  If it exists, update the contents.
2492  */
2493     static void
2494 qf_update_buffer(qi)
2495     qf_info_T	*qi;
2496 {
2497     buf_T	*buf;
2498     aco_save_T	aco;
2499 
2500     /* Check if a buffer for the quickfix list exists.  Update it. */
2501     buf = qf_find_buf(qi);
2502     if (buf != NULL)
2503     {
2504 	/* set curwin/curbuf to buf and save a few things */
2505 	aucmd_prepbuf(&aco, buf);
2506 
2507 	qf_fill_buffer(qi);
2508 
2509 	/* restore curwin/curbuf and a few other things */
2510 	aucmd_restbuf(&aco);
2511 
2512 	(void)qf_win_pos_update(qi, 0);
2513     }
2514 }
2515 
2516 /*
2517  * Fill current buffer with quickfix errors, replacing any previous contents.
2518  * curbuf must be the quickfix buffer!
2519  */
2520     static void
2521 qf_fill_buffer(qi)
2522     qf_info_T	*qi;
2523 {
2524     linenr_T	lnum;
2525     qfline_T	*qfp;
2526     buf_T	*errbuf;
2527     int		len;
2528     int		old_KeyTyped = KeyTyped;
2529 
2530     /* delete all existing lines */
2531     while ((curbuf->b_ml.ml_flags & ML_EMPTY) == 0)
2532 	(void)ml_delete((linenr_T)1, FALSE);
2533 
2534     /* Check if there is anything to display */
2535     if (qi->qf_curlist < qi->qf_listcount)
2536     {
2537 	/* Add one line for each error */
2538 	qfp = qi->qf_lists[qi->qf_curlist].qf_start;
2539 	for (lnum = 0; lnum < qi->qf_lists[qi->qf_curlist].qf_count; ++lnum)
2540 	{
2541 	    if (qfp->qf_fnum != 0
2542 		    && (errbuf = buflist_findnr(qfp->qf_fnum)) != NULL
2543 		    && errbuf->b_fname != NULL)
2544 	    {
2545 		if (qfp->qf_type == 1)	/* :helpgrep */
2546 		    STRCPY(IObuff, gettail(errbuf->b_fname));
2547 		else
2548 		    STRCPY(IObuff, errbuf->b_fname);
2549 		len = (int)STRLEN(IObuff);
2550 	    }
2551 	    else
2552 		len = 0;
2553 	    IObuff[len++] = '|';
2554 
2555 	    if (qfp->qf_lnum > 0)
2556 	    {
2557 		sprintf((char *)IObuff + len, "%ld", qfp->qf_lnum);
2558 		len += (int)STRLEN(IObuff + len);
2559 
2560 		if (qfp->qf_col > 0)
2561 		{
2562 		    sprintf((char *)IObuff + len, " col %d", qfp->qf_col);
2563 		    len += (int)STRLEN(IObuff + len);
2564 		}
2565 
2566 		sprintf((char *)IObuff + len, "%s",
2567 				  (char *)qf_types(qfp->qf_type, qfp->qf_nr));
2568 		len += (int)STRLEN(IObuff + len);
2569 	    }
2570 	    else if (qfp->qf_pattern != NULL)
2571 	    {
2572 		qf_fmt_text(qfp->qf_pattern, IObuff + len, IOSIZE - len);
2573 		len += (int)STRLEN(IObuff + len);
2574 	    }
2575 	    IObuff[len++] = '|';
2576 	    IObuff[len++] = ' ';
2577 
2578 	    /* Remove newlines and leading whitespace from the text.
2579 	     * For an unrecognized line keep the indent, the compiler may
2580 	     * mark a word with ^^^^. */
2581 	    qf_fmt_text(len > 3 ? skipwhite(qfp->qf_text) : qfp->qf_text,
2582 						  IObuff + len, IOSIZE - len);
2583 
2584 	    if (ml_append(lnum, IObuff, (colnr_T)STRLEN(IObuff) + 1, FALSE)
2585 								      == FAIL)
2586 		break;
2587 	    qfp = qfp->qf_next;
2588 	}
2589 	/* Delete the empty line which is now at the end */
2590 	(void)ml_delete(lnum + 1, FALSE);
2591     }
2592 
2593     /* correct cursor position */
2594     check_lnums(TRUE);
2595 
2596     /* Set the 'filetype' to "qf" each time after filling the buffer.  This
2597      * resembles reading a file into a buffer, it's more logical when using
2598      * autocommands. */
2599     set_option_value((char_u *)"ft", 0L, (char_u *)"qf", OPT_LOCAL);
2600     curbuf->b_p_ma = FALSE;
2601 
2602 #ifdef FEAT_AUTOCMD
2603     apply_autocmds(EVENT_BUFREADPOST, (char_u *)"quickfix", NULL,
2604 							       FALSE, curbuf);
2605     apply_autocmds(EVENT_BUFWINENTER, (char_u *)"quickfix", NULL,
2606 							       FALSE, curbuf);
2607 #endif
2608 
2609     /* make sure it will be redrawn */
2610     redraw_curbuf_later(NOT_VALID);
2611 
2612     /* Restore KeyTyped, setting 'filetype' may reset it. */
2613     KeyTyped = old_KeyTyped;
2614 }
2615 
2616 #endif /* FEAT_WINDOWS */
2617 
2618 /*
2619  * Return TRUE if "buf" is the quickfix buffer.
2620  */
2621     int
2622 bt_quickfix(buf)
2623     buf_T	*buf;
2624 {
2625     return (buf->b_p_bt[0] == 'q');
2626 }
2627 
2628 /*
2629  * Return TRUE if "buf" is a "nofile" or "acwrite" buffer.
2630  * This means the buffer name is not a file name.
2631  */
2632     int
2633 bt_nofile(buf)
2634     buf_T	*buf;
2635 {
2636     return (buf->b_p_bt[0] == 'n' && buf->b_p_bt[2] == 'f')
2637 	    || buf->b_p_bt[0] == 'a';
2638 }
2639 
2640 /*
2641  * Return TRUE if "buf" is a "nowrite" or "nofile" buffer.
2642  */
2643     int
2644 bt_dontwrite(buf)
2645     buf_T	*buf;
2646 {
2647     return (buf->b_p_bt[0] == 'n');
2648 }
2649 
2650     int
2651 bt_dontwrite_msg(buf)
2652     buf_T	*buf;
2653 {
2654     if (bt_dontwrite(buf))
2655     {
2656 	EMSG(_("E382: Cannot write, 'buftype' option is set"));
2657 	return TRUE;
2658     }
2659     return FALSE;
2660 }
2661 
2662 /*
2663  * Return TRUE if the buffer should be hidden, according to 'hidden', ":hide"
2664  * and 'bufhidden'.
2665  */
2666     int
2667 buf_hide(buf)
2668     buf_T	*buf;
2669 {
2670     /* 'bufhidden' overrules 'hidden' and ":hide", check it first */
2671     switch (buf->b_p_bh[0])
2672     {
2673 	case 'u':		    /* "unload" */
2674 	case 'w':		    /* "wipe" */
2675 	case 'd': return FALSE;	    /* "delete" */
2676 	case 'h': return TRUE;	    /* "hide" */
2677     }
2678     return (p_hid || cmdmod.hide);
2679 }
2680 
2681 /*
2682  * Return TRUE when using ":vimgrep" for ":grep".
2683  */
2684     int
2685 grep_internal(cmdidx)
2686     cmdidx_T	cmdidx;
2687 {
2688     return ((cmdidx == CMD_grep
2689 		|| cmdidx == CMD_lgrep
2690 		|| cmdidx == CMD_grepadd
2691 		|| cmdidx == CMD_lgrepadd)
2692 	    && STRCMP("internal",
2693 			*curbuf->b_p_gp == NUL ? p_gp : curbuf->b_p_gp) == 0);
2694 }
2695 
2696 /*
2697  * Used for ":make", ":lmake", ":grep", ":lgrep", ":grepadd", and ":lgrepadd"
2698  */
2699     void
2700 ex_make(eap)
2701     exarg_T	*eap;
2702 {
2703     char_u	*fname;
2704     char_u	*cmd;
2705     unsigned	len;
2706     win_T	*wp = NULL;
2707     qf_info_T	*qi = &ql_info;
2708     int		res;
2709 #ifdef FEAT_AUTOCMD
2710     char_u	*au_name = NULL;
2711 
2712     switch (eap->cmdidx)
2713     {
2714 	case CMD_make:	    au_name = (char_u *)"make"; break;
2715 	case CMD_lmake:	    au_name = (char_u *)"lmake"; break;
2716 	case CMD_grep:	    au_name = (char_u *)"grep"; break;
2717 	case CMD_lgrep:	    au_name = (char_u *)"lgrep"; break;
2718 	case CMD_grepadd:   au_name = (char_u *)"grepadd"; break;
2719 	case CMD_lgrepadd:  au_name = (char_u *)"lgrepadd"; break;
2720 	default: break;
2721     }
2722     if (au_name != NULL)
2723     {
2724 	apply_autocmds(EVENT_QUICKFIXCMDPRE, au_name,
2725 					       curbuf->b_fname, TRUE, curbuf);
2726 # ifdef FEAT_EVAL
2727 	if (did_throw || force_abort)
2728 	    return;
2729 # endif
2730     }
2731 #endif
2732 
2733     /* Redirect ":grep" to ":vimgrep" if 'grepprg' is "internal". */
2734     if (grep_internal(eap->cmdidx))
2735     {
2736 	ex_vimgrep(eap);
2737 	return;
2738     }
2739 
2740     if (eap->cmdidx == CMD_lmake || eap->cmdidx == CMD_lgrep
2741 	|| eap->cmdidx == CMD_lgrepadd)
2742 	wp = curwin;
2743 
2744     autowrite_all();
2745     fname = get_mef_name();
2746     if (fname == NULL)
2747 	return;
2748     mch_remove(fname);	    /* in case it's not unique */
2749 
2750     /*
2751      * If 'shellpipe' empty: don't redirect to 'errorfile'.
2752      */
2753     len = (unsigned)STRLEN(p_shq) * 2 + (unsigned)STRLEN(eap->arg) + 1;
2754     if (*p_sp != NUL)
2755 	len += (unsigned)STRLEN(p_sp) + (unsigned)STRLEN(fname) + 3;
2756     cmd = alloc(len);
2757     if (cmd == NULL)
2758 	return;
2759     sprintf((char *)cmd, "%s%s%s", (char *)p_shq, (char *)eap->arg,
2760 							       (char *)p_shq);
2761     if (*p_sp != NUL)
2762 	append_redir(cmd, p_sp, fname);
2763     /*
2764      * Output a newline if there's something else than the :make command that
2765      * was typed (in which case the cursor is in column 0).
2766      */
2767     if (msg_col == 0)
2768 	msg_didout = FALSE;
2769     msg_start();
2770     MSG_PUTS(":!");
2771     msg_outtrans(cmd);		/* show what we are doing */
2772 
2773     /* let the shell know if we are redirecting output or not */
2774     do_shell(cmd, *p_sp != NUL ? SHELL_DOOUT : 0);
2775 
2776 #ifdef AMIGA
2777     out_flush();
2778 		/* read window status report and redraw before message */
2779     (void)char_avail();
2780 #endif
2781 
2782     res = qf_init(wp, fname, (eap->cmdidx != CMD_make
2783 			    && eap->cmdidx != CMD_lmake) ? p_gefm : p_efm,
2784 					   (eap->cmdidx != CMD_grepadd
2785 					    && eap->cmdidx != CMD_lgrepadd));
2786 #ifdef FEAT_AUTOCMD
2787     if (au_name != NULL)
2788 	apply_autocmds(EVENT_QUICKFIXCMDPOST, au_name,
2789 					       curbuf->b_fname, TRUE, curbuf);
2790 #endif
2791     if (res > 0 && !eap->forceit)
2792     {
2793 	if (wp != NULL)
2794 	    qi = GET_LOC_LIST(wp);
2795 	qf_jump(qi, 0, 0, FALSE);		/* display first error */
2796     }
2797 
2798     mch_remove(fname);
2799     vim_free(fname);
2800     vim_free(cmd);
2801 }
2802 
2803 /*
2804  * Return the name for the errorfile, in allocated memory.
2805  * Find a new unique name when 'makeef' contains "##".
2806  * Returns NULL for error.
2807  */
2808     static char_u *
2809 get_mef_name()
2810 {
2811     char_u	*p;
2812     char_u	*name;
2813     static int	start = -1;
2814     static int	off = 0;
2815 #ifdef HAVE_LSTAT
2816     struct stat	sb;
2817 #endif
2818 
2819     if (*p_mef == NUL)
2820     {
2821 	name = vim_tempname('e');
2822 	if (name == NULL)
2823 	    EMSG(_(e_notmp));
2824 	return name;
2825     }
2826 
2827     for (p = p_mef; *p; ++p)
2828 	if (p[0] == '#' && p[1] == '#')
2829 	    break;
2830 
2831     if (*p == NUL)
2832 	return vim_strsave(p_mef);
2833 
2834     /* Keep trying until the name doesn't exist yet. */
2835     for (;;)
2836     {
2837 	if (start == -1)
2838 	    start = mch_get_pid();
2839 	else
2840 	    off += 19;
2841 
2842 	name = alloc((unsigned)STRLEN(p_mef) + 30);
2843 	if (name == NULL)
2844 	    break;
2845 	STRCPY(name, p_mef);
2846 	sprintf((char *)name + (p - p_mef), "%d%d", start, off);
2847 	STRCAT(name, p + 2);
2848 	if (mch_getperm(name) < 0
2849 #ifdef HAVE_LSTAT
2850 		    /* Don't accept a symbolic link, its a security risk. */
2851 		    && mch_lstat((char *)name, &sb) < 0
2852 #endif
2853 		)
2854 	    break;
2855 	vim_free(name);
2856     }
2857     return name;
2858 }
2859 
2860 /*
2861  * ":cc", ":crewind", ":cfirst" and ":clast".
2862  * ":ll", ":lrewind", ":lfirst" and ":llast".
2863  */
2864     void
2865 ex_cc(eap)
2866     exarg_T	*eap;
2867 {
2868     qf_info_T	*qi = &ql_info;
2869 
2870     if (eap->cmdidx == CMD_ll
2871 	    || eap->cmdidx == CMD_lrewind
2872 	    || eap->cmdidx == CMD_lfirst
2873 	    || eap->cmdidx == CMD_llast)
2874     {
2875 	qi = GET_LOC_LIST(curwin);
2876 	if (qi == NULL)
2877 	{
2878 	    EMSG(_(e_loclist));
2879 	    return;
2880 	}
2881     }
2882 
2883     qf_jump(qi, 0,
2884 	    eap->addr_count > 0
2885 	    ? (int)eap->line2
2886 	    : (eap->cmdidx == CMD_cc || eap->cmdidx == CMD_ll)
2887 		? 0
2888 		: (eap->cmdidx == CMD_crewind || eap->cmdidx == CMD_lrewind
2889 		   || eap->cmdidx == CMD_cfirst || eap->cmdidx == CMD_lfirst)
2890 		    ? 1
2891 		    : 32767,
2892 	    eap->forceit);
2893 }
2894 
2895 /*
2896  * ":cnext", ":cnfile", ":cNext" and ":cprevious".
2897  * ":lnext", ":lNext", ":lprevious", ":lnfile", ":lNfile" and ":lpfile".
2898  */
2899     void
2900 ex_cnext(eap)
2901     exarg_T	*eap;
2902 {
2903     qf_info_T	*qi = &ql_info;
2904 
2905     if (eap->cmdidx == CMD_lnext
2906 	    || eap->cmdidx == CMD_lNext
2907 	    || eap->cmdidx == CMD_lprevious
2908 	    || eap->cmdidx == CMD_lnfile
2909 	    || eap->cmdidx == CMD_lNfile
2910 	    || eap->cmdidx == CMD_lpfile)
2911     {
2912 	qi = GET_LOC_LIST(curwin);
2913 	if (qi == NULL)
2914 	{
2915 	    EMSG(_(e_loclist));
2916 	    return;
2917 	}
2918     }
2919 
2920     qf_jump(qi, (eap->cmdidx == CMD_cnext || eap->cmdidx == CMD_lnext)
2921 	    ? FORWARD
2922 	    : (eap->cmdidx == CMD_cnfile || eap->cmdidx == CMD_lnfile)
2923 		? FORWARD_FILE
2924 		: (eap->cmdidx == CMD_cpfile || eap->cmdidx == CMD_lpfile
2925 		   || eap->cmdidx == CMD_cNfile || eap->cmdidx == CMD_lNfile)
2926 		    ? BACKWARD_FILE
2927 		    : BACKWARD,
2928 	    eap->addr_count > 0 ? (int)eap->line2 : 1, eap->forceit);
2929 }
2930 
2931 /*
2932  * ":cfile"/":cgetfile"/":caddfile" commands.
2933  * ":lfile"/":lgetfile"/":laddfile" commands.
2934  */
2935     void
2936 ex_cfile(eap)
2937     exarg_T	*eap;
2938 {
2939     win_T	*wp = NULL;
2940     qf_info_T	*qi = &ql_info;
2941 
2942     if (eap->cmdidx == CMD_lfile || eap->cmdidx == CMD_lgetfile
2943 	|| eap->cmdidx == CMD_laddfile)
2944 	wp = curwin;
2945 
2946     if (*eap->arg != NUL)
2947 	set_string_option_direct((char_u *)"ef", -1, eap->arg, OPT_FREE, 0);
2948 
2949     /*
2950      * This function is used by the :cfile, :cgetfile and :caddfile
2951      * commands.
2952      * :cfile always creates a new quickfix list and jumps to the
2953      * first error.
2954      * :cgetfile creates a new quickfix list but doesn't jump to the
2955      * first error.
2956      * :caddfile adds to an existing quickfix list. If there is no
2957      * quickfix list then a new list is created.
2958      */
2959     if (qf_init(wp, p_ef, p_efm, (eap->cmdidx != CMD_caddfile
2960 				  && eap->cmdidx != CMD_laddfile)) > 0
2961 				  && (eap->cmdidx == CMD_cfile
2962 					     || eap->cmdidx == CMD_lfile))
2963     {
2964 	if (wp != NULL)
2965 	    qi = GET_LOC_LIST(wp);
2966 	qf_jump(qi, 0, 0, eap->forceit);	/* display first error */
2967     }
2968 }
2969 
2970 /*
2971  * ":vimgrep {pattern} file(s)"
2972  * ":vimgrepadd {pattern} file(s)"
2973  * ":lvimgrep {pattern} file(s)"
2974  * ":lvimgrepadd {pattern} file(s)"
2975  */
2976     void
2977 ex_vimgrep(eap)
2978     exarg_T	*eap;
2979 {
2980     regmmatch_T	regmatch;
2981     int		fcount;
2982     char_u	**fnames;
2983     char_u	*fname;
2984     char_u	*s;
2985     char_u	*p;
2986     int		fi;
2987     qf_info_T	*qi = &ql_info;
2988     qfline_T	*prevp = NULL;
2989     long	lnum;
2990     buf_T	*buf;
2991     int		duplicate_name = FALSE;
2992     int		using_dummy;
2993     int		redraw_for_dummy = FALSE;
2994     int		found_match;
2995     buf_T	*first_match_buf = NULL;
2996     time_t	seconds = 0;
2997     int		save_mls;
2998 #if defined(FEAT_AUTOCMD) && defined(FEAT_SYN_HL)
2999     char_u	*save_ei = NULL;
3000 #endif
3001     aco_save_T	aco;
3002     int		flags = 0;
3003     colnr_T	col;
3004     long	tomatch;
3005     char_u	dirname_start[MAXPATHL];
3006     char_u	dirname_now[MAXPATHL];
3007     char_u	*target_dir = NULL;
3008 #ifdef FEAT_AUTOCMD
3009     char_u	*au_name =  NULL;
3010 
3011     switch (eap->cmdidx)
3012     {
3013 	case CMD_vimgrep: au_name = (char_u *)"vimgrep"; break;
3014 	case CMD_lvimgrep: au_name = (char_u *)"lvimgrep"; break;
3015 	case CMD_vimgrepadd: au_name = (char_u *)"vimgrepadd"; break;
3016 	case CMD_lvimgrepadd: au_name = (char_u *)"lvimgrepadd"; break;
3017 	default: break;
3018     }
3019     if (au_name != NULL)
3020     {
3021 	apply_autocmds(EVENT_QUICKFIXCMDPRE, au_name,
3022 					       curbuf->b_fname, TRUE, curbuf);
3023 	if (did_throw || force_abort)
3024 	    return;
3025     }
3026 #endif
3027 
3028     if (eap->cmdidx == CMD_lgrep
3029 	    || eap->cmdidx == CMD_lvimgrep
3030 	    || eap->cmdidx == CMD_lgrepadd
3031 	    || eap->cmdidx == CMD_lvimgrepadd)
3032     {
3033 	qi = ll_get_or_alloc_list(curwin);
3034 	if (qi == NULL)
3035 	    return;
3036     }
3037 
3038     if (eap->addr_count > 0)
3039 	tomatch = eap->line2;
3040     else
3041 	tomatch = MAXLNUM;
3042 
3043     /* Get the search pattern: either white-separated or enclosed in // */
3044     regmatch.regprog = NULL;
3045     p = skip_vimgrep_pat(eap->arg, &s, &flags);
3046     if (p == NULL)
3047     {
3048 	EMSG(_(e_invalpat));
3049 	goto theend;
3050     }
3051     regmatch.regprog = vim_regcomp(s, RE_MAGIC);
3052     if (regmatch.regprog == NULL)
3053 	goto theend;
3054     regmatch.rmm_ic = p_ic;
3055     regmatch.rmm_maxcol = 0;
3056 
3057     p = skipwhite(p);
3058     if (*p == NUL)
3059     {
3060 	EMSG(_("E683: File name missing or invalid pattern"));
3061 	goto theend;
3062     }
3063 
3064     if ((eap->cmdidx != CMD_grepadd && eap->cmdidx != CMD_lgrepadd &&
3065 	 eap->cmdidx != CMD_vimgrepadd && eap->cmdidx != CMD_lvimgrepadd)
3066 					|| qi->qf_curlist == qi->qf_listcount)
3067 	/* make place for a new list */
3068 	qf_new_list(qi);
3069     else if (qi->qf_lists[qi->qf_curlist].qf_count > 0)
3070 	/* Adding to existing list, find last entry. */
3071 	for (prevp = qi->qf_lists[qi->qf_curlist].qf_start;
3072 			    prevp->qf_next != prevp; prevp = prevp->qf_next)
3073 	    ;
3074 
3075     /* parse the list of arguments */
3076     if (get_arglist_exp(p, &fcount, &fnames) == FAIL)
3077 	goto theend;
3078     if (fcount == 0)
3079     {
3080 	EMSG(_(e_nomatch));
3081 	goto theend;
3082     }
3083 
3084     /* Remember the current directory, because a BufRead autocommand that does
3085      * ":lcd %:p:h" changes the meaning of short path names. */
3086     mch_dirname(dirname_start, MAXPATHL);
3087 
3088     seconds = (time_t)0;
3089     for (fi = 0; fi < fcount && !got_int && tomatch > 0; ++fi)
3090     {
3091 	fname = shorten_fname1(fnames[fi]);
3092 	if (time(NULL) > seconds)
3093 	{
3094 	    /* Display the file name every second or so, show the user we are
3095 	     * working on it. */
3096 	    seconds = time(NULL);
3097 	    msg_start();
3098 	    p = msg_strtrunc(fname, TRUE);
3099 	    if (p == NULL)
3100 		msg_outtrans(fname);
3101 	    else
3102 	    {
3103 		msg_outtrans(p);
3104 		vim_free(p);
3105 	    }
3106 	    msg_clr_eos();
3107 	    msg_didout = FALSE;	    /* overwrite this message */
3108 	    msg_nowait = TRUE;	    /* don't wait for this message */
3109 	    msg_col = 0;
3110 	    out_flush();
3111 	}
3112 
3113 	buf = buflist_findname_exp(fnames[fi]);
3114 	if (buf == NULL || buf->b_ml.ml_mfp == NULL)
3115 	{
3116 	    /* Remember that a buffer with this name already exists. */
3117 	    duplicate_name = (buf != NULL);
3118 	    using_dummy = TRUE;
3119 	    redraw_for_dummy = TRUE;
3120 
3121 #if defined(FEAT_AUTOCMD) && defined(FEAT_SYN_HL)
3122 	    /* Don't do Filetype autocommands to avoid loading syntax and
3123 	     * indent scripts, a great speed improvement. */
3124 	    save_ei = au_event_disable(",Filetype");
3125 #endif
3126 	    /* Don't use modelines here, it's useless. */
3127 	    save_mls = p_mls;
3128 	    p_mls = 0;
3129 
3130 	    /* Load file into a buffer, so that 'fileencoding' is detected,
3131 	     * autocommands applied, etc. */
3132 	    buf = load_dummy_buffer(fname);
3133 
3134 	    /* When autocommands changed directory: go back.  We assume it was
3135 	     * ":lcd %:p:h". */
3136 	    mch_dirname(dirname_now, MAXPATHL);
3137 	    if (STRCMP(dirname_start, dirname_now) != 0)
3138 	    {
3139 		exarg_T ea;
3140 
3141 		ea.arg = dirname_start;
3142 		ea.cmdidx = CMD_lcd;
3143 		ex_cd(&ea);
3144 	    }
3145 
3146 	    p_mls = save_mls;
3147 #if defined(FEAT_AUTOCMD) && defined(FEAT_SYN_HL)
3148 	    au_event_restore(save_ei);
3149 #endif
3150 	}
3151 	else
3152 	    /* Use existing, loaded buffer. */
3153 	    using_dummy = FALSE;
3154 
3155 	if (buf == NULL)
3156 	{
3157 	    if (!got_int)
3158 		smsg((char_u *)_("Cannot open file \"%s\""), fname);
3159 	}
3160 	else
3161 	{
3162 	    /* Try for a match in all lines of the buffer.
3163 	     * For ":1vimgrep" look for first match only. */
3164 	    found_match = FALSE;
3165 	    for (lnum = 1; lnum <= buf->b_ml.ml_line_count && tomatch > 0;
3166 								       ++lnum)
3167 	    {
3168 		col = 0;
3169 		while (vim_regexec_multi(&regmatch, curwin, buf, lnum,
3170 							       col, NULL) > 0)
3171 		{
3172 		    ;
3173 		    if (qf_add_entry(qi, &prevp,
3174 				NULL,       /* dir */
3175 				fname,
3176 				0,
3177 				ml_get_buf(buf,
3178 				     regmatch.startpos[0].lnum + lnum, FALSE),
3179 				regmatch.startpos[0].lnum + lnum,
3180 				regmatch.startpos[0].col + 1,
3181 				FALSE,      /* vis_col */
3182 				NULL,	    /* search pattern */
3183 				0,	    /* nr */
3184 				0,	    /* type */
3185 				TRUE	    /* valid */
3186 				) == FAIL)
3187 		    {
3188 			got_int = TRUE;
3189 			break;
3190 		    }
3191 		    found_match = TRUE;
3192 		    if (--tomatch == 0)
3193 			break;
3194 		    if ((flags & VGR_GLOBAL) == 0
3195 					       || regmatch.endpos[0].lnum > 0)
3196 			break;
3197 		    col = regmatch.endpos[0].col
3198 					    + (col == regmatch.endpos[0].col);
3199 		    if (col > STRLEN(ml_get_buf(buf, lnum, FALSE)))
3200 			break;
3201 		}
3202 		line_breakcheck();
3203 		if (got_int)
3204 		    break;
3205 	    }
3206 
3207 	    if (using_dummy)
3208 	    {
3209 		if (found_match && first_match_buf == NULL)
3210 		    first_match_buf = buf;
3211 		if (duplicate_name)
3212 		{
3213 		    /* Never keep a dummy buffer if there is another buffer
3214 		     * with the same name. */
3215 		    wipe_dummy_buffer(buf);
3216 		    buf = NULL;
3217 		}
3218 		else if (!cmdmod.hide
3219 			    || buf->b_p_bh[0] == 'u'	/* "unload" */
3220 			    || buf->b_p_bh[0] == 'w'	/* "wipe" */
3221 			    || buf->b_p_bh[0] == 'd')	/* "delete" */
3222 		{
3223 		    /* When no match was found we don't need to remember the
3224 		     * buffer, wipe it out.  If there was a match and it
3225 		     * wasn't the first one or we won't jump there: only
3226 		     * unload the buffer.
3227 		     * Ignore 'hidden' here, because it may lead to having too
3228 		     * many swap files. */
3229 		    if (!found_match)
3230 		    {
3231 			wipe_dummy_buffer(buf);
3232 			buf = NULL;
3233 		    }
3234 		    else if (buf != first_match_buf || (flags & VGR_NOJUMP))
3235 		    {
3236 			unload_dummy_buffer(buf);
3237 			buf = NULL;
3238 		    }
3239 		}
3240 
3241 		if (buf != NULL)
3242 		{
3243 		    /* If the buffer is still loaded we need to use the
3244 		     * directory we jumped to below. */
3245 		    if (buf == first_match_buf
3246 			    && target_dir == NULL
3247 			    && STRCMP(dirname_start, dirname_now) != 0)
3248 			target_dir = vim_strsave(dirname_now);
3249 
3250 		    /* The buffer is still loaded, the Filetype autocommands
3251 		     * need to be done now, in that buffer.  And the modelines
3252 		     * need to be done (again).  But not the window-local
3253 		     * options! */
3254 		    aucmd_prepbuf(&aco, buf);
3255 #if defined(FEAT_AUTOCMD) && defined(FEAT_SYN_HL)
3256 		    apply_autocmds(EVENT_FILETYPE, buf->b_p_ft,
3257 						     buf->b_fname, TRUE, buf);
3258 #endif
3259 		    do_modelines(OPT_NOWIN);
3260 		    aucmd_restbuf(&aco);
3261 		}
3262 	    }
3263 	}
3264     }
3265 
3266     FreeWild(fcount, fnames);
3267 
3268     qi->qf_lists[qi->qf_curlist].qf_nonevalid = FALSE;
3269     qi->qf_lists[qi->qf_curlist].qf_ptr = qi->qf_lists[qi->qf_curlist].qf_start;
3270     qi->qf_lists[qi->qf_curlist].qf_index = 1;
3271 
3272 #ifdef FEAT_WINDOWS
3273     qf_update_buffer(qi);
3274 #endif
3275 
3276 #ifdef FEAT_AUTOCMD
3277     if (au_name != NULL)
3278 	apply_autocmds(EVENT_QUICKFIXCMDPOST, au_name,
3279 					       curbuf->b_fname, TRUE, curbuf);
3280 #endif
3281 
3282     /* Jump to first match. */
3283     if (qi->qf_lists[qi->qf_curlist].qf_count > 0)
3284     {
3285 	if ((flags & VGR_NOJUMP) == 0)
3286 	{
3287 	    buf = curbuf;
3288 	    qf_jump(qi, 0, 0, eap->forceit);
3289 	    if (buf != curbuf)
3290 		/* If we jumped to another buffer redrawing will already be
3291 		 * taken care of. */
3292 		redraw_for_dummy = FALSE;
3293 
3294 	    /* Jump to the directory used after loading the buffer. */
3295 	    if (curbuf == first_match_buf && target_dir != NULL)
3296 	    {
3297 		exarg_T ea;
3298 
3299 		ea.arg = target_dir;
3300 		ea.cmdidx = CMD_lcd;
3301 		ex_cd(&ea);
3302 	    }
3303 	}
3304     }
3305     else
3306 	EMSG2(_(e_nomatch2), s);
3307 
3308     /* If we loaded a dummy buffer into the current window, the autocommands
3309      * may have messed up things, need to redraw and recompute folds. */
3310     if (redraw_for_dummy)
3311     {
3312 #ifdef FEAT_FOLDING
3313 	foldUpdateAll(curwin);
3314 #else
3315 	redraw_later(NOT_VALID);
3316 #endif
3317     }
3318 
3319 theend:
3320     vim_free(target_dir);
3321     vim_free(regmatch.regprog);
3322 }
3323 
3324 /*
3325  * Skip over the pattern argument of ":vimgrep /pat/[g][j]".
3326  * Put the start of the pattern in "*s", unless "s" is NULL.
3327  * If "flags" is not NULL put the flags in it: VGR_GLOBAL, VGR_NOJUMP.
3328  * If "s" is not NULL terminate the pattern with a NUL.
3329  * Return a pointer to the char just past the pattern plus flags.
3330  */
3331     char_u *
3332 skip_vimgrep_pat(p, s, flags)
3333     char_u  *p;
3334     char_u  **s;
3335     int	    *flags;
3336 {
3337     int		c;
3338 
3339     if (vim_isIDc(*p))
3340     {
3341 	/* ":vimgrep pattern fname" */
3342 	if (s != NULL)
3343 	    *s = p;
3344 	p = skiptowhite(p);
3345 	if (s != NULL && *p != NUL)
3346 	    *p++ = NUL;
3347     }
3348     else
3349     {
3350 	/* ":vimgrep /pattern/[g][j] fname" */
3351 	if (s != NULL)
3352 	    *s = p + 1;
3353 	c = *p;
3354 	p = skip_regexp(p + 1, c, TRUE, NULL);
3355 	if (*p != c)
3356 	    return NULL;
3357 
3358 	/* Truncate the pattern. */
3359 	if (s != NULL)
3360 	    *p = NUL;
3361 	++p;
3362 
3363 	/* Find the flags */
3364 	while (*p == 'g' || *p == 'j')
3365 	{
3366 	    if (flags != NULL)
3367 	    {
3368 		if (*p == 'g')
3369 		    *flags |= VGR_GLOBAL;
3370 		else
3371 		    *flags |= VGR_NOJUMP;
3372 	    }
3373 	    ++p;
3374 	}
3375     }
3376     return p;
3377 }
3378 
3379 /*
3380  * Load file "fname" into a dummy buffer and return the buffer pointer.
3381  * Returns NULL if it fails.
3382  * Must call unload_dummy_buffer() or wipe_dummy_buffer() later!
3383  */
3384     static buf_T *
3385 load_dummy_buffer(fname)
3386     char_u	*fname;
3387 {
3388     buf_T	*newbuf;
3389     int		failed = TRUE;
3390     aco_save_T	aco;
3391 
3392     /* Allocate a buffer without putting it in the buffer list. */
3393     newbuf = buflist_new(NULL, NULL, (linenr_T)1, BLN_DUMMY);
3394     if (newbuf == NULL)
3395 	return NULL;
3396 
3397     /* Init the options. */
3398     buf_copy_options(newbuf, BCO_ENTER | BCO_NOHELP);
3399 
3400     /* set curwin/curbuf to buf and save a few things */
3401     aucmd_prepbuf(&aco, newbuf);
3402 
3403     /* Need to set the filename for autocommands. */
3404     (void)setfname(curbuf, fname, NULL, FALSE);
3405 
3406     if (ml_open(curbuf) == OK)
3407     {
3408 	/* Create swap file now to avoid the ATTENTION message. */
3409 	check_need_swap(TRUE);
3410 
3411 	/* Remove the "dummy" flag, otherwise autocommands may not
3412 	 * work. */
3413 	curbuf->b_flags &= ~BF_DUMMY;
3414 
3415 	if (readfile(fname, NULL,
3416 		    (linenr_T)0, (linenr_T)0, (linenr_T)MAXLNUM,
3417 		    NULL, READ_NEW | READ_DUMMY) == OK
3418 		&& !got_int
3419 		&& !(curbuf->b_flags & BF_NEW))
3420 	{
3421 	    failed = FALSE;
3422 	    if (curbuf != newbuf)
3423 	    {
3424 		/* Bloody autocommands changed the buffer! */
3425 		if (buf_valid(newbuf))
3426 		    wipe_buffer(newbuf, FALSE);
3427 		newbuf = curbuf;
3428 	    }
3429 	}
3430     }
3431 
3432     /* restore curwin/curbuf and a few other things */
3433     aucmd_restbuf(&aco);
3434 
3435     if (!buf_valid(newbuf))
3436 	return NULL;
3437     if (failed)
3438     {
3439 	wipe_dummy_buffer(newbuf);
3440 	return NULL;
3441     }
3442     return newbuf;
3443 }
3444 
3445 /*
3446  * Wipe out the dummy buffer that load_dummy_buffer() created.
3447  */
3448     static void
3449 wipe_dummy_buffer(buf)
3450     buf_T	*buf;
3451 {
3452     if (curbuf != buf)		/* safety check */
3453     {
3454 #if defined(FEAT_AUTOCMD) && defined(FEAT_EVAL)
3455 	cleanup_T   cs;
3456 
3457 	/* Reset the error/interrupt/exception state here so that aborting()
3458 	 * returns FALSE when wiping out the buffer.  Otherwise it doesn't
3459 	 * work when got_int is set. */
3460 	enter_cleanup(&cs);
3461 #endif
3462 
3463 	wipe_buffer(buf, FALSE);
3464 
3465 #if defined(FEAT_AUTOCMD) && defined(FEAT_EVAL)
3466 	/* Restore the error/interrupt/exception state if not discarded by a
3467 	 * new aborting error, interrupt, or uncaught exception. */
3468 	leave_cleanup(&cs);
3469 #endif
3470     }
3471 }
3472 
3473 /*
3474  * Unload the dummy buffer that load_dummy_buffer() created.
3475  */
3476     static void
3477 unload_dummy_buffer(buf)
3478     buf_T	*buf;
3479 {
3480     if (curbuf != buf)		/* safety check */
3481 	close_buffer(NULL, buf, DOBUF_UNLOAD);
3482 }
3483 
3484 #if defined(FEAT_EVAL) || defined(PROTO)
3485 /*
3486  * Add each quickfix error to list "list" as a dictionary.
3487  */
3488     int
3489 get_errorlist(wp, list)
3490     win_T	*wp;
3491     list_T	*list;
3492 {
3493     qf_info_T	*qi = &ql_info;
3494     dict_T	*dict;
3495     char_u	buf[2];
3496     qfline_T	*qfp;
3497     int		i;
3498     int		bufnum;
3499 
3500     if (wp != NULL)
3501     {
3502 	qi = GET_LOC_LIST(wp);
3503 	if (qi == NULL)
3504 	    return FAIL;
3505     }
3506 
3507     if (qi->qf_curlist >= qi->qf_listcount
3508 	    || qi->qf_lists[qi->qf_curlist].qf_count == 0)
3509 	return FAIL;
3510 
3511     qfp = qi->qf_lists[qi->qf_curlist].qf_start;
3512     for (i = 1; !got_int && i <= qi->qf_lists[qi->qf_curlist].qf_count; ++i)
3513     {
3514 	/* Handle entries with a non-existing buffer number. */
3515 	bufnum = qfp->qf_fnum;
3516 	if (bufnum != 0 && (buflist_findnr(bufnum) == NULL))
3517 	    bufnum = 0;
3518 
3519 	if ((dict = dict_alloc()) == NULL)
3520 	    return FAIL;
3521 	if (list_append_dict(list, dict) == FAIL)
3522 	    return FAIL;
3523 
3524 	buf[0] = qfp->qf_type;
3525 	buf[1] = NUL;
3526 	if ( dict_add_nr_str(dict, "bufnr", (long)bufnum, NULL) == FAIL
3527 	  || dict_add_nr_str(dict, "lnum",  (long)qfp->qf_lnum, NULL) == FAIL
3528 	  || dict_add_nr_str(dict, "col",   (long)qfp->qf_col, NULL) == FAIL
3529 	  || dict_add_nr_str(dict, "vcol",  (long)qfp->qf_viscol, NULL) == FAIL
3530 	  || dict_add_nr_str(dict, "nr",    (long)qfp->qf_nr, NULL) == FAIL
3531 	  || dict_add_nr_str(dict, "pattern",  0L,
3532 	     qfp->qf_pattern == NULL ? (char_u *)"" : qfp->qf_pattern) == FAIL
3533 	  || dict_add_nr_str(dict, "text",  0L,
3534 		   qfp->qf_text == NULL ? (char_u *)"" : qfp->qf_text) == FAIL
3535 	  || dict_add_nr_str(dict, "type",  0L, buf) == FAIL
3536 	  || dict_add_nr_str(dict, "valid", (long)qfp->qf_valid, NULL) == FAIL)
3537 	    return FAIL;
3538 
3539 	qfp = qfp->qf_next;
3540     }
3541     return OK;
3542 }
3543 
3544 /*
3545  * Populate the quickfix list with the items supplied in the list
3546  * of dictionaries.
3547  */
3548     int
3549 set_errorlist(wp, list, action)
3550     win_T	*wp;
3551     list_T	*list;
3552     int		action;
3553 {
3554     listitem_T	*li;
3555     dict_T	*d;
3556     char_u	*filename, *pattern, *text, *type;
3557     int		bufnum;
3558     long	lnum;
3559     int		col, nr;
3560     int		vcol;
3561     qfline_T	*prevp = NULL;
3562     int		valid, status;
3563     int		retval = OK;
3564     qf_info_T	*qi = &ql_info;
3565     int		did_bufnr_emsg = FALSE;
3566 
3567     if (wp != NULL)
3568     {
3569 	qi = ll_get_or_alloc_list(wp);
3570 	if (qi == NULL)
3571 	    return FAIL;
3572     }
3573 
3574     if (action == ' ' || qi->qf_curlist == qi->qf_listcount)
3575 	/* make place for a new list */
3576 	qf_new_list(qi);
3577     else if (action == 'a' && qi->qf_lists[qi->qf_curlist].qf_count > 0)
3578 	/* Adding to existing list, find last entry. */
3579 	for (prevp = qi->qf_lists[qi->qf_curlist].qf_start;
3580 	     prevp->qf_next != prevp; prevp = prevp->qf_next)
3581 	    ;
3582     else if (action == 'r')
3583 	qf_free(qi, qi->qf_curlist);
3584 
3585     for (li = list->lv_first; li != NULL; li = li->li_next)
3586     {
3587 	if (li->li_tv.v_type != VAR_DICT)
3588 	    continue; /* Skip non-dict items */
3589 
3590 	d = li->li_tv.vval.v_dict;
3591 	if (d == NULL)
3592 	    continue;
3593 
3594 	filename = get_dict_string(d, (char_u *)"filename", TRUE);
3595 	bufnum = get_dict_number(d, (char_u *)"bufnr");
3596 	lnum = get_dict_number(d, (char_u *)"lnum");
3597 	col = get_dict_number(d, (char_u *)"col");
3598 	vcol = get_dict_number(d, (char_u *)"vcol");
3599 	nr = get_dict_number(d, (char_u *)"nr");
3600 	type = get_dict_string(d, (char_u *)"type", TRUE);
3601 	pattern = get_dict_string(d, (char_u *)"pattern", TRUE);
3602 	text = get_dict_string(d, (char_u *)"text", TRUE);
3603 	if (text == NULL)
3604 	    text = vim_strsave((char_u *)"");
3605 
3606 	valid = TRUE;
3607 	if ((filename == NULL && bufnum == 0) || (lnum == 0 && pattern == NULL))
3608 	    valid = FALSE;
3609 
3610 	/* Mark entries with non-existing buffer number as not valid. Give the
3611 	 * error message only once. */
3612 	if (bufnum != 0 && (buflist_findnr(bufnum) == NULL))
3613 	{
3614 	    if (!did_bufnr_emsg)
3615 	    {
3616 		did_bufnr_emsg = TRUE;
3617 		EMSGN(_("E92: Buffer %ld not found"), bufnum);
3618 	    }
3619 	    valid = FALSE;
3620 	    bufnum = 0;
3621 	}
3622 
3623 	status =  qf_add_entry(qi, &prevp,
3624 			       NULL,	    /* dir */
3625 			       filename,
3626 			       bufnum,
3627 			       text,
3628 			       lnum,
3629 			       col,
3630 			       vcol,	    /* vis_col */
3631 			       pattern,	    /* search pattern */
3632 			       nr,
3633 			       type == NULL ? NUL : *type,
3634 			       valid);
3635 
3636 	vim_free(filename);
3637 	vim_free(pattern);
3638 	vim_free(text);
3639 	vim_free(type);
3640 
3641 	if (status == FAIL)
3642 	{
3643 	    retval = FAIL;
3644 	    break;
3645 	}
3646     }
3647 
3648     qi->qf_lists[qi->qf_curlist].qf_nonevalid = FALSE;
3649     qi->qf_lists[qi->qf_curlist].qf_ptr = qi->qf_lists[qi->qf_curlist].qf_start;
3650     qi->qf_lists[qi->qf_curlist].qf_index = 1;
3651 
3652 #ifdef FEAT_WINDOWS
3653     qf_update_buffer(qi);
3654 #endif
3655 
3656     return retval;
3657 }
3658 #endif
3659 
3660 /*
3661  * ":[range]cbuffer [bufnr]" command.
3662  * ":[range]caddbuffer [bufnr]" command.
3663  * ":[range]cgetbuffer [bufnr]" command.
3664  * ":[range]lbuffer [bufnr]" command.
3665  * ":[range]laddbuffer [bufnr]" command.
3666  * ":[range]lgetbuffer [bufnr]" command.
3667  */
3668     void
3669 ex_cbuffer(eap)
3670     exarg_T   *eap;
3671 {
3672     buf_T	*buf = NULL;
3673     qf_info_T	*qi = &ql_info;
3674 
3675     if (eap->cmdidx == CMD_lbuffer || eap->cmdidx == CMD_lgetbuffer
3676 	    || eap->cmdidx == CMD_laddbuffer)
3677     {
3678 	qi = ll_get_or_alloc_list(curwin);
3679 	if (qi == NULL)
3680 	    return;
3681     }
3682 
3683     if (*eap->arg == NUL)
3684 	buf = curbuf;
3685     else if (*skipwhite(skipdigits(eap->arg)) == NUL)
3686 	buf = buflist_findnr(atoi((char *)eap->arg));
3687     if (buf == NULL)
3688 	EMSG(_(e_invarg));
3689     else if (buf->b_ml.ml_mfp == NULL)
3690 	EMSG(_("E681: Buffer is not loaded"));
3691     else
3692     {
3693 	if (eap->addr_count == 0)
3694 	{
3695 	    eap->line1 = 1;
3696 	    eap->line2 = buf->b_ml.ml_line_count;
3697 	}
3698 	if (eap->line1 < 1 || eap->line1 > buf->b_ml.ml_line_count
3699 		|| eap->line2 < 1 || eap->line2 > buf->b_ml.ml_line_count)
3700 	    EMSG(_(e_invrange));
3701 	else
3702 	{
3703 	    if (qf_init_ext(qi, NULL, buf, NULL, p_efm,
3704 			    (eap->cmdidx != CMD_caddbuffer
3705 			     && eap->cmdidx != CMD_laddbuffer),
3706 						   eap->line1, eap->line2) > 0
3707 		    && (eap->cmdidx == CMD_cbuffer
3708 			|| eap->cmdidx == CMD_lbuffer))
3709 		qf_jump(qi, 0, 0, eap->forceit);  /* display first error */
3710 	}
3711     }
3712 }
3713 
3714 #if defined(FEAT_EVAL) || defined(PROTO)
3715 /*
3716  * ":cexpr {expr}", ":cgetexpr {expr}", ":caddexpr {expr}" command.
3717  * ":lexpr {expr}", ":lgetexpr {expr}", ":laddexpr {expr}" command.
3718  */
3719     void
3720 ex_cexpr(eap)
3721     exarg_T	*eap;
3722 {
3723     typval_T	*tv;
3724     qf_info_T	*qi = &ql_info;
3725 
3726     if (eap->cmdidx == CMD_lexpr || eap->cmdidx == CMD_lgetexpr
3727 	    || eap->cmdidx == CMD_laddexpr)
3728     {
3729 	qi = ll_get_or_alloc_list(curwin);
3730 	if (qi == NULL)
3731 	    return;
3732     }
3733 
3734     /* Evaluate the expression.  When the result is a string or a list we can
3735      * use it to fill the errorlist. */
3736     tv = eval_expr(eap->arg, NULL);
3737     if (tv != NULL)
3738     {
3739 	if ((tv->v_type == VAR_STRING && tv->vval.v_string != NULL)
3740 		|| (tv->v_type == VAR_LIST && tv->vval.v_list != NULL))
3741 	{
3742 	    if (qf_init_ext(qi, NULL, NULL, tv, p_efm,
3743 			    (eap->cmdidx != CMD_caddexpr
3744 			     && eap->cmdidx != CMD_laddexpr),
3745 						 (linenr_T)0, (linenr_T)0) > 0
3746 		    && (eap->cmdidx == CMD_cexpr
3747 			|| eap->cmdidx == CMD_lexpr))
3748 		qf_jump(qi, 0, 0, eap->forceit);  /* display first error */
3749 	}
3750 	else
3751 	    EMSG(_("E777: String or List expected"));
3752 	free_tv(tv);
3753     }
3754 }
3755 #endif
3756 
3757 /*
3758  * ":helpgrep {pattern}"
3759  */
3760     void
3761 ex_helpgrep(eap)
3762     exarg_T	*eap;
3763 {
3764     regmatch_T	regmatch;
3765     char_u	*save_cpo;
3766     char_u	*p;
3767     int		fcount;
3768     char_u	**fnames;
3769     FILE	*fd;
3770     int		fi;
3771     qfline_T	*prevp = NULL;
3772     long	lnum;
3773 #ifdef FEAT_MULTI_LANG
3774     char_u	*lang;
3775 #endif
3776     qf_info_T	*qi = &ql_info;
3777     int		new_qi = FALSE;
3778     win_T	*wp;
3779 
3780     /* Make 'cpoptions' empty, the 'l' flag should not be used here. */
3781     save_cpo = p_cpo;
3782     p_cpo = empty_option;
3783 
3784 #ifdef FEAT_MULTI_LANG
3785     /* Check for a specified language */
3786     lang = check_help_lang(eap->arg);
3787 #endif
3788 
3789     if (eap->cmdidx == CMD_lhelpgrep)
3790     {
3791 	/* Find an existing help window */
3792 	FOR_ALL_WINDOWS(wp)
3793 	    if (wp->w_buffer != NULL && wp->w_buffer->b_help)
3794 		break;
3795 
3796 	if (wp == NULL)	    /* Help window not found */
3797 	    qi = NULL;
3798 	else
3799 	    qi = wp->w_llist;
3800 
3801 	if (qi == NULL)
3802 	{
3803 	    /* Allocate a new location list for help text matches */
3804 	    if ((qi = ll_new_list()) == NULL)
3805 		return;
3806 	    new_qi = TRUE;
3807 	}
3808     }
3809 
3810     regmatch.regprog = vim_regcomp(eap->arg, RE_MAGIC + RE_STRING);
3811     regmatch.rm_ic = FALSE;
3812     if (regmatch.regprog != NULL)
3813     {
3814 	/* create a new quickfix list */
3815 	qf_new_list(qi);
3816 
3817 	/* Go through all directories in 'runtimepath' */
3818 	p = p_rtp;
3819 	while (*p != NUL && !got_int)
3820 	{
3821 	    copy_option_part(&p, NameBuff, MAXPATHL, ",");
3822 
3823 	    /* Find all "*.txt" and "*.??x" files in the "doc" directory. */
3824 	    add_pathsep(NameBuff);
3825 	    STRCAT(NameBuff, "doc/*.\\(txt\\|??x\\)");
3826 	    if (gen_expand_wildcards(1, &NameBuff, &fcount,
3827 					     &fnames, EW_FILE|EW_SILENT) == OK
3828 		    && fcount > 0)
3829 	    {
3830 		for (fi = 0; fi < fcount && !got_int; ++fi)
3831 		{
3832 #ifdef FEAT_MULTI_LANG
3833 		    /* Skip files for a different language. */
3834 		    if (lang != NULL
3835 			    && STRNICMP(lang, fnames[fi]
3836 					    + STRLEN(fnames[fi]) - 3, 2) != 0
3837 			    && !(STRNICMP(lang, "en", 2) == 0
3838 				&& STRNICMP("txt", fnames[fi]
3839 					   + STRLEN(fnames[fi]) - 3, 3) == 0))
3840 			    continue;
3841 #endif
3842 		    fd = mch_fopen((char *)fnames[fi], "r");
3843 		    if (fd != NULL)
3844 		    {
3845 			lnum = 1;
3846 			while (!vim_fgets(IObuff, IOSIZE, fd) && !got_int)
3847 			{
3848 			    if (vim_regexec(&regmatch, IObuff, (colnr_T)0))
3849 			    {
3850 				int	l = (int)STRLEN(IObuff);
3851 
3852 				/* remove trailing CR, LF, spaces, etc. */
3853 				while (l > 0 && IObuff[l - 1] <= ' ')
3854 				     IObuff[--l] = NUL;
3855 
3856 				if (qf_add_entry(qi, &prevp,
3857 					    NULL,	/* dir */
3858 					    fnames[fi],
3859 					    0,
3860 					    IObuff,
3861 					    lnum,
3862 					    (int)(regmatch.startp[0] - IObuff)
3863 								+ 1, /* col */
3864 					    FALSE,	/* vis_col */
3865 					    NULL,	/* search pattern */
3866 					    0,		/* nr */
3867 					    1,		/* type */
3868 					    TRUE	/* valid */
3869 					    ) == FAIL)
3870 				{
3871 				    got_int = TRUE;
3872 				    break;
3873 				}
3874 			    }
3875 			    ++lnum;
3876 			    line_breakcheck();
3877 			}
3878 			fclose(fd);
3879 		    }
3880 		}
3881 		FreeWild(fcount, fnames);
3882 	    }
3883 	}
3884 	vim_free(regmatch.regprog);
3885 
3886 	qi->qf_lists[qi->qf_curlist].qf_nonevalid = FALSE;
3887 	qi->qf_lists[qi->qf_curlist].qf_ptr =
3888 	    qi->qf_lists[qi->qf_curlist].qf_start;
3889 	qi->qf_lists[qi->qf_curlist].qf_index = 1;
3890     }
3891 
3892     if (p_cpo == empty_option)
3893 	p_cpo = save_cpo;
3894     else
3895 	/* Darn, some plugin changed the value. */
3896 	free_string_option(save_cpo);
3897 
3898 #ifdef FEAT_WINDOWS
3899     qf_update_buffer(qi);
3900 #endif
3901 
3902     /* Jump to first match. */
3903     if (qi->qf_lists[qi->qf_curlist].qf_count > 0)
3904 	qf_jump(qi, 0, 0, FALSE);
3905     else
3906 	EMSG2(_(e_nomatch2), eap->arg);
3907 
3908     if (eap->cmdidx == CMD_lhelpgrep)
3909     {
3910 	/* If the help window is not opened or if it already points to the
3911 	 * correct location list, then free the new location list. */
3912 	if (!curwin->w_buffer->b_help || curwin->w_llist == qi)
3913 	{
3914 	    if (new_qi)
3915 		ll_free_all(&qi);
3916 	}
3917 	else if (curwin->w_llist == NULL)
3918 	    curwin->w_llist = qi;
3919     }
3920 }
3921 
3922 #endif /* FEAT_QUICKFIX */
3923