xref: /vim-8.2.3635/src/quickfix.c (revision 00a927d6)
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     int			flags;
1423 #endif
1424     win_T		*oldwin = curwin;
1425     int			print_message = TRUE;
1426     int			len;
1427 #ifdef FEAT_FOLDING
1428     int			old_KeyTyped = KeyTyped; /* getting file may reset it */
1429 #endif
1430     int			ok = OK;
1431     int			usable_win;
1432 
1433     if (qi == NULL)
1434 	qi = &ql_info;
1435 
1436     if (qi->qf_curlist >= qi->qf_listcount
1437 	|| qi->qf_lists[qi->qf_curlist].qf_count == 0)
1438     {
1439 	EMSG(_(e_quickfix));
1440 	return;
1441     }
1442 
1443     qf_ptr = qi->qf_lists[qi->qf_curlist].qf_ptr;
1444     old_qf_ptr = qf_ptr;
1445     qf_index = qi->qf_lists[qi->qf_curlist].qf_index;
1446     old_qf_index = qf_index;
1447     if (dir == FORWARD || dir == FORWARD_FILE)	    /* next valid entry */
1448     {
1449 	while (errornr--)
1450 	{
1451 	    old_qf_ptr = qf_ptr;
1452 	    prev_index = qf_index;
1453 	    old_qf_fnum = qf_ptr->qf_fnum;
1454 	    do
1455 	    {
1456 		if (qf_index == qi->qf_lists[qi->qf_curlist].qf_count
1457 						   || qf_ptr->qf_next == NULL)
1458 		{
1459 		    qf_ptr = old_qf_ptr;
1460 		    qf_index = prev_index;
1461 		    if (err != NULL)
1462 		    {
1463 			EMSG(_(err));
1464 			goto theend;
1465 		    }
1466 		    errornr = 0;
1467 		    break;
1468 		}
1469 		++qf_index;
1470 		qf_ptr = qf_ptr->qf_next;
1471 	    } while ((!qi->qf_lists[qi->qf_curlist].qf_nonevalid
1472 		      && !qf_ptr->qf_valid)
1473 		  || (dir == FORWARD_FILE && qf_ptr->qf_fnum == old_qf_fnum));
1474 	    err = NULL;
1475 	}
1476     }
1477     else if (dir == BACKWARD || dir == BACKWARD_FILE)  /* prev. valid entry */
1478     {
1479 	while (errornr--)
1480 	{
1481 	    old_qf_ptr = qf_ptr;
1482 	    prev_index = qf_index;
1483 	    old_qf_fnum = qf_ptr->qf_fnum;
1484 	    do
1485 	    {
1486 		if (qf_index == 1 || qf_ptr->qf_prev == NULL)
1487 		{
1488 		    qf_ptr = old_qf_ptr;
1489 		    qf_index = prev_index;
1490 		    if (err != NULL)
1491 		    {
1492 			EMSG(_(err));
1493 			goto theend;
1494 		    }
1495 		    errornr = 0;
1496 		    break;
1497 		}
1498 		--qf_index;
1499 		qf_ptr = qf_ptr->qf_prev;
1500 	    } while ((!qi->qf_lists[qi->qf_curlist].qf_nonevalid
1501 		      && !qf_ptr->qf_valid)
1502 		  || (dir == BACKWARD_FILE && qf_ptr->qf_fnum == old_qf_fnum));
1503 	    err = NULL;
1504 	}
1505     }
1506     else if (errornr != 0)	/* go to specified number */
1507     {
1508 	while (errornr < qf_index && qf_index > 1 && qf_ptr->qf_prev != NULL)
1509 	{
1510 	    --qf_index;
1511 	    qf_ptr = qf_ptr->qf_prev;
1512 	}
1513 	while (errornr > qf_index && qf_index <
1514 				    qi->qf_lists[qi->qf_curlist].qf_count
1515 						   && qf_ptr->qf_next != NULL)
1516 	{
1517 	    ++qf_index;
1518 	    qf_ptr = qf_ptr->qf_next;
1519 	}
1520     }
1521 
1522 #ifdef FEAT_WINDOWS
1523     qi->qf_lists[qi->qf_curlist].qf_index = qf_index;
1524     if (qf_win_pos_update(qi, old_qf_index))
1525 	/* No need to print the error message if it's visible in the error
1526 	 * window */
1527 	print_message = FALSE;
1528 
1529     /*
1530      * For ":helpgrep" find a help window or open one.
1531      */
1532     if (qf_ptr->qf_type == 1 && (!curwin->w_buffer->b_help || cmdmod.tab != 0))
1533     {
1534 	win_T	*wp;
1535 
1536 	if (cmdmod.tab != 0)
1537 	    wp = NULL;
1538 	else
1539 	    for (wp = firstwin; wp != NULL; wp = wp->w_next)
1540 		if (wp->w_buffer != NULL && wp->w_buffer->b_help)
1541 		    break;
1542 	if (wp != NULL && wp->w_buffer->b_nwindows > 0)
1543 	    win_enter(wp, TRUE);
1544 	else
1545 	{
1546 	    /*
1547 	     * Split off help window; put it at far top if no position
1548 	     * specified, the current window is vertically split and narrow.
1549 	     */
1550 	    flags = WSP_HELP;
1551 # ifdef FEAT_VERTSPLIT
1552 	    if (cmdmod.split == 0 && curwin->w_width != Columns
1553 						      && curwin->w_width < 80)
1554 		flags |= WSP_TOP;
1555 # endif
1556 	    if (qi != &ql_info)
1557 		flags |= WSP_NEWLOC;  /* don't copy the location list */
1558 
1559 	    if (win_split(0, flags) == FAIL)
1560 		goto theend;
1561 	    opened_window = TRUE;	/* close it when fail */
1562 
1563 	    if (curwin->w_height < p_hh)
1564 		win_setheight((int)p_hh);
1565 
1566 	    if (qi != &ql_info)	    /* not a quickfix list */
1567 	    {
1568 		/* The new window should use the supplied location list */
1569 		curwin->w_llist = qi;
1570 		qi->qf_refcount++;
1571 	    }
1572 	}
1573 
1574 	if (!p_im)
1575 	    restart_edit = 0;	    /* don't want insert mode in help file */
1576     }
1577 
1578     /*
1579      * If currently in the quickfix window, find another window to show the
1580      * file in.
1581      */
1582     if (bt_quickfix(curbuf) && !opened_window)
1583     {
1584 	/*
1585 	 * If there is no file specified, we don't know where to go.
1586 	 * But do advance, otherwise ":cn" gets stuck.
1587 	 */
1588 	if (qf_ptr->qf_fnum == 0)
1589 	    goto theend;
1590 
1591 	/* Locate a window showing a normal buffer */
1592 	usable_win = 0;
1593 	FOR_ALL_WINDOWS(win)
1594 	    if (win->w_buffer->b_p_bt[0] == NUL)
1595 	    {
1596 		usable_win = 1;
1597 		break;
1598 	    }
1599 
1600 	/*
1601 	 * If no usable window is found and 'switchbuf' contains "usetab"
1602 	 * then search in other tabs.
1603 	 */
1604 	if (!usable_win && (swb_flags & SWB_USETAB))
1605 	{
1606 	    tabpage_T	*tp;
1607 	    win_T	*wp;
1608 
1609 	    FOR_ALL_TAB_WINDOWS(tp, wp)
1610 	    {
1611 		if (wp->w_buffer->b_fnum == qf_ptr->qf_fnum)
1612 		{
1613 		    goto_tabpage_win(tp, wp);
1614 		    usable_win = 1;
1615 		    goto win_found;
1616 		}
1617 	    }
1618 	}
1619 win_found:
1620 
1621 	/*
1622 	 * If there is only one window and it is the quickfix window, create a
1623 	 * new one above the quickfix window.
1624 	 */
1625 	if (((firstwin == lastwin) && bt_quickfix(curbuf)) || !usable_win)
1626 	{
1627 	    ll_ref = curwin->w_llist_ref;
1628 
1629 	    flags = WSP_ABOVE;
1630 	    if (ll_ref != NULL)
1631 		flags |= WSP_NEWLOC;
1632 	    if (win_split(0, flags) == FAIL)
1633 		goto failed;		/* not enough room for window */
1634 	    opened_window = TRUE;	/* close it when fail */
1635 	    p_swb = empty_option;	/* don't split again */
1636 	    swb_flags = 0;
1637 # ifdef FEAT_SCROLLBIND
1638 	    curwin->w_p_scb = FALSE;
1639 # endif
1640 	    if (ll_ref != NULL)
1641 	    {
1642 		/* The new window should use the location list from the
1643 		 * location list window */
1644 		curwin->w_llist = ll_ref;
1645 		ll_ref->qf_refcount++;
1646 	    }
1647 	}
1648 	else
1649 	{
1650 	    if (curwin->w_llist_ref != NULL)
1651 	    {
1652 		/* In a location window */
1653 		ll_ref = curwin->w_llist_ref;
1654 
1655 		/* Find the window with the same location list */
1656 		FOR_ALL_WINDOWS(win)
1657 		    if (win->w_llist == ll_ref)
1658 			break;
1659 		if (win == NULL)
1660 		{
1661 		    /* Find the window showing the selected file */
1662 		    FOR_ALL_WINDOWS(win)
1663 			if (win->w_buffer->b_fnum == qf_ptr->qf_fnum)
1664 			    break;
1665 		    if (win == NULL)
1666 		    {
1667 			/* Find a previous usable window */
1668 			win = curwin;
1669 			do
1670 			{
1671 			    if (win->w_buffer->b_p_bt[0] == NUL)
1672 				break;
1673 			    if (win->w_prev == NULL)
1674 				win = lastwin;	/* wrap around the top */
1675 			    else
1676 				win = win->w_prev; /* go to previous window */
1677 			} while (win != curwin);
1678 		    }
1679 		}
1680 		win_goto(win);
1681 
1682 		/* If the location list for the window is not set, then set it
1683 		 * to the location list from the location window */
1684 		if (win->w_llist == NULL)
1685 		{
1686 		    win->w_llist = ll_ref;
1687 		    ll_ref->qf_refcount++;
1688 		}
1689 	    }
1690 	    else
1691 	    {
1692 
1693 	    /*
1694 	     * Try to find a window that shows the right buffer.
1695 	     * Default to the window just above the quickfix buffer.
1696 	     */
1697 	    win = curwin;
1698 	    altwin = NULL;
1699 	    for (;;)
1700 	    {
1701 		if (win->w_buffer->b_fnum == qf_ptr->qf_fnum)
1702 		    break;
1703 		if (win->w_prev == NULL)
1704 		    win = lastwin;	/* wrap around the top */
1705 		else
1706 		    win = win->w_prev;	/* go to previous window */
1707 
1708 		if (IS_QF_WINDOW(win))
1709 		{
1710 		    /* Didn't find it, go to the window before the quickfix
1711 		     * window. */
1712 		    if (altwin != NULL)
1713 			win = altwin;
1714 		    else if (curwin->w_prev != NULL)
1715 			win = curwin->w_prev;
1716 		    else
1717 			win = curwin->w_next;
1718 		    break;
1719 		}
1720 
1721 		/* Remember a usable window. */
1722 		if (altwin == NULL && !win->w_p_pvw
1723 					   && win->w_buffer->b_p_bt[0] == NUL)
1724 		    altwin = win;
1725 	    }
1726 
1727 	    win_goto(win);
1728 	    }
1729 	}
1730     }
1731 #endif
1732 
1733     /*
1734      * If there is a file name,
1735      * read the wanted file if needed, and check autowrite etc.
1736      */
1737     old_curbuf = curbuf;
1738     old_lnum = curwin->w_cursor.lnum;
1739 
1740     if (qf_ptr->qf_fnum != 0)
1741     {
1742 	if (qf_ptr->qf_type == 1)
1743 	{
1744 	    /* Open help file (do_ecmd() will set b_help flag, readfile() will
1745 	     * set b_p_ro flag). */
1746 	    if (!can_abandon(curbuf, forceit))
1747 	    {
1748 		EMSG(_(e_nowrtmsg));
1749 		ok = FALSE;
1750 	    }
1751 	    else
1752 		ok = do_ecmd(qf_ptr->qf_fnum, NULL, NULL, NULL, (linenr_T)1,
1753 					   ECMD_HIDE + ECMD_SET_HELP,
1754 					   oldwin == curwin ? curwin : NULL);
1755 	}
1756 	else
1757 	    ok = buflist_getfile(qf_ptr->qf_fnum,
1758 			    (linenr_T)1, GETF_SETMARK | GETF_SWITCH, forceit);
1759     }
1760 
1761     if (ok == OK)
1762     {
1763 	/* When not switched to another buffer, still need to set pc mark */
1764 	if (curbuf == old_curbuf)
1765 	    setpcmark();
1766 
1767 	if (qf_ptr->qf_pattern == NULL)
1768 	{
1769 	    /*
1770 	     * Go to line with error, unless qf_lnum is 0.
1771 	     */
1772 	    i = qf_ptr->qf_lnum;
1773 	    if (i > 0)
1774 	    {
1775 		if (i > curbuf->b_ml.ml_line_count)
1776 		    i = curbuf->b_ml.ml_line_count;
1777 		curwin->w_cursor.lnum = i;
1778 	    }
1779 	    if (qf_ptr->qf_col > 0)
1780 	    {
1781 		curwin->w_cursor.col = qf_ptr->qf_col - 1;
1782 		if (qf_ptr->qf_viscol == TRUE)
1783 		{
1784 		    /*
1785 		     * Check each character from the beginning of the error
1786 		     * line up to the error column.  For each tab character
1787 		     * found, reduce the error column value by the length of
1788 		     * a tab character.
1789 		     */
1790 		    line = ml_get_curline();
1791 		    screen_col = 0;
1792 		    for (char_col = 0; char_col < curwin->w_cursor.col; ++char_col)
1793 		    {
1794 			if (*line == NUL)
1795 			    break;
1796 			if (*line++ == '\t')
1797 			{
1798 			    curwin->w_cursor.col -= 7 - (screen_col % 8);
1799 			    screen_col += 8 - (screen_col % 8);
1800 			}
1801 			else
1802 			    ++screen_col;
1803 		    }
1804 		}
1805 		check_cursor();
1806 	    }
1807 	    else
1808 		beginline(BL_WHITE | BL_FIX);
1809 	}
1810 	else
1811 	{
1812 	    pos_T save_cursor;
1813 
1814 	    /* Move the cursor to the first line in the buffer */
1815 	    save_cursor = curwin->w_cursor;
1816 	    curwin->w_cursor.lnum = 0;
1817 	    if (!do_search(NULL, '/', qf_ptr->qf_pattern, (long)1,
1818 							   SEARCH_KEEP, NULL))
1819 		curwin->w_cursor = save_cursor;
1820 	}
1821 
1822 #ifdef FEAT_FOLDING
1823 	if ((fdo_flags & FDO_QUICKFIX) && old_KeyTyped)
1824 	    foldOpenCursor();
1825 #endif
1826 	if (print_message)
1827 	{
1828 	    /* Update the screen before showing the message */
1829 	    update_topline_redraw();
1830 	    sprintf((char *)IObuff, _("(%d of %d)%s%s: "), qf_index,
1831 		    qi->qf_lists[qi->qf_curlist].qf_count,
1832 		    qf_ptr->qf_cleared ? _(" (line deleted)") : "",
1833 		    (char *)qf_types(qf_ptr->qf_type, qf_ptr->qf_nr));
1834 	    /* Add the message, skipping leading whitespace and newlines. */
1835 	    len = (int)STRLEN(IObuff);
1836 	    qf_fmt_text(skipwhite(qf_ptr->qf_text), IObuff + len, IOSIZE - len);
1837 
1838 	    /* Output the message.  Overwrite to avoid scrolling when the 'O'
1839 	     * flag is present in 'shortmess'; But when not jumping, print the
1840 	     * whole message. */
1841 	    i = msg_scroll;
1842 	    if (curbuf == old_curbuf && curwin->w_cursor.lnum == old_lnum)
1843 		msg_scroll = TRUE;
1844 	    else if (!msg_scrolled && shortmess(SHM_OVERALL))
1845 		msg_scroll = FALSE;
1846 	    msg_attr_keep(IObuff, 0, TRUE);
1847 	    msg_scroll = i;
1848 	}
1849     }
1850     else
1851     {
1852 #ifdef FEAT_WINDOWS
1853 	if (opened_window)
1854 	    win_close(curwin, TRUE);    /* Close opened window */
1855 #endif
1856 	if (qf_ptr->qf_fnum != 0)
1857 	{
1858 	    /*
1859 	     * Couldn't open file, so put index back where it was.  This could
1860 	     * happen if the file was readonly and we changed something.
1861 	     */
1862 #ifdef FEAT_WINDOWS
1863 failed:
1864 #endif
1865 	    qf_ptr = old_qf_ptr;
1866 	    qf_index = old_qf_index;
1867 	}
1868     }
1869 theend:
1870     qi->qf_lists[qi->qf_curlist].qf_ptr = qf_ptr;
1871     qi->qf_lists[qi->qf_curlist].qf_index = qf_index;
1872 #ifdef FEAT_WINDOWS
1873     if (p_swb != old_swb && opened_window)
1874     {
1875 	/* Restore old 'switchbuf' value, but not when an autocommand or
1876 	 * modeline has changed the value. */
1877 	if (p_swb == empty_option)
1878 	{
1879 	    p_swb = old_swb;
1880 	    swb_flags = old_swb_flags;
1881 	}
1882 	else
1883 	    free_string_option(old_swb);
1884     }
1885 #endif
1886 }
1887 
1888 /*
1889  * ":clist": list all errors
1890  * ":llist": list all locations
1891  */
1892     void
1893 qf_list(eap)
1894     exarg_T	*eap;
1895 {
1896     buf_T	*buf;
1897     char_u	*fname;
1898     qfline_T	*qfp;
1899     int		i;
1900     int		idx1 = 1;
1901     int		idx2 = -1;
1902     char_u	*arg = eap->arg;
1903     int		all = eap->forceit;	/* if not :cl!, only show
1904 						   recognised errors */
1905     qf_info_T	*qi = &ql_info;
1906 
1907     if (eap->cmdidx == CMD_llist)
1908     {
1909 	qi = GET_LOC_LIST(curwin);
1910 	if (qi == NULL)
1911 	{
1912 	    EMSG(_(e_loclist));
1913 	    return;
1914 	}
1915     }
1916 
1917     if (qi->qf_curlist >= qi->qf_listcount
1918 	|| qi->qf_lists[qi->qf_curlist].qf_count == 0)
1919     {
1920 	EMSG(_(e_quickfix));
1921 	return;
1922     }
1923     if (!get_list_range(&arg, &idx1, &idx2) || *arg != NUL)
1924     {
1925 	EMSG(_(e_trailing));
1926 	return;
1927     }
1928     i = qi->qf_lists[qi->qf_curlist].qf_count;
1929     if (idx1 < 0)
1930 	idx1 = (-idx1 > i) ? 0 : idx1 + i + 1;
1931     if (idx2 < 0)
1932 	idx2 = (-idx2 > i) ? 0 : idx2 + i + 1;
1933 
1934     if (qi->qf_lists[qi->qf_curlist].qf_nonevalid)
1935 	all = TRUE;
1936     qfp = qi->qf_lists[qi->qf_curlist].qf_start;
1937     for (i = 1; !got_int && i <= qi->qf_lists[qi->qf_curlist].qf_count; )
1938     {
1939 	if ((qfp->qf_valid || all) && idx1 <= i && i <= idx2)
1940 	{
1941 	    msg_putchar('\n');
1942 	    if (got_int)
1943 		break;
1944 
1945 	    fname = NULL;
1946 	    if (qfp->qf_fnum != 0
1947 			      && (buf = buflist_findnr(qfp->qf_fnum)) != NULL)
1948 	    {
1949 		fname = buf->b_fname;
1950 		if (qfp->qf_type == 1)	/* :helpgrep */
1951 		    fname = gettail(fname);
1952 	    }
1953 	    if (fname == NULL)
1954 		sprintf((char *)IObuff, "%2d", i);
1955 	    else
1956 		vim_snprintf((char *)IObuff, IOSIZE, "%2d %s",
1957 							    i, (char *)fname);
1958 	    msg_outtrans_attr(IObuff, i == qi->qf_lists[qi->qf_curlist].qf_index
1959 					   ? hl_attr(HLF_L) : hl_attr(HLF_D));
1960 	    if (qfp->qf_lnum == 0)
1961 		IObuff[0] = NUL;
1962 	    else if (qfp->qf_col == 0)
1963 		sprintf((char *)IObuff, ":%ld", qfp->qf_lnum);
1964 	    else
1965 		sprintf((char *)IObuff, ":%ld col %d",
1966 						   qfp->qf_lnum, qfp->qf_col);
1967 	    sprintf((char *)IObuff + STRLEN(IObuff), "%s:",
1968 				  (char *)qf_types(qfp->qf_type, qfp->qf_nr));
1969 	    msg_puts_attr(IObuff, hl_attr(HLF_N));
1970 	    if (qfp->qf_pattern != NULL)
1971 	    {
1972 		qf_fmt_text(qfp->qf_pattern, IObuff, IOSIZE);
1973 		STRCAT(IObuff, ":");
1974 		msg_puts(IObuff);
1975 	    }
1976 	    msg_puts((char_u *)" ");
1977 
1978 	    /* Remove newlines and leading whitespace from the text.  For an
1979 	     * unrecognized line keep the indent, the compiler may mark a word
1980 	     * with ^^^^. */
1981 	    qf_fmt_text((fname != NULL || qfp->qf_lnum != 0)
1982 				     ? skipwhite(qfp->qf_text) : qfp->qf_text,
1983 							      IObuff, IOSIZE);
1984 	    msg_prt_line(IObuff, FALSE);
1985 	    out_flush();		/* show one line at a time */
1986 	}
1987 
1988 	qfp = qfp->qf_next;
1989 	++i;
1990 	ui_breakcheck();
1991     }
1992 }
1993 
1994 /*
1995  * Remove newlines and leading whitespace from an error message.
1996  * Put the result in "buf[bufsize]".
1997  */
1998     static void
1999 qf_fmt_text(text, buf, bufsize)
2000     char_u	*text;
2001     char_u	*buf;
2002     int		bufsize;
2003 {
2004     int		i;
2005     char_u	*p = text;
2006 
2007     for (i = 0; *p != NUL && i < bufsize - 1; ++i)
2008     {
2009 	if (*p == '\n')
2010 	{
2011 	    buf[i] = ' ';
2012 	    while (*++p != NUL)
2013 		if (!vim_iswhite(*p) && *p != '\n')
2014 		    break;
2015 	}
2016 	else
2017 	    buf[i] = *p++;
2018     }
2019     buf[i] = NUL;
2020 }
2021 
2022 /*
2023  * ":colder [count]": Up in the quickfix stack.
2024  * ":cnewer [count]": Down in the quickfix stack.
2025  * ":lolder [count]": Up in the location list stack.
2026  * ":lnewer [count]": Down in the location list stack.
2027  */
2028     void
2029 qf_age(eap)
2030     exarg_T	*eap;
2031 {
2032     qf_info_T	*qi = &ql_info;
2033     int		count;
2034 
2035     if (eap->cmdidx == CMD_lolder || eap->cmdidx == CMD_lnewer)
2036     {
2037 	qi = GET_LOC_LIST(curwin);
2038 	if (qi == NULL)
2039 	{
2040 	    EMSG(_(e_loclist));
2041 	    return;
2042 	}
2043     }
2044 
2045     if (eap->addr_count != 0)
2046 	count = eap->line2;
2047     else
2048 	count = 1;
2049     while (count--)
2050     {
2051 	if (eap->cmdidx == CMD_colder || eap->cmdidx == CMD_lolder)
2052 	{
2053 	    if (qi->qf_curlist == 0)
2054 	    {
2055 		EMSG(_("E380: At bottom of quickfix stack"));
2056 		return;
2057 	    }
2058 	    --qi->qf_curlist;
2059 	}
2060 	else
2061 	{
2062 	    if (qi->qf_curlist >= qi->qf_listcount - 1)
2063 	    {
2064 		EMSG(_("E381: At top of quickfix stack"));
2065 		return;
2066 	    }
2067 	    ++qi->qf_curlist;
2068 	}
2069     }
2070     qf_msg(qi);
2071 
2072 }
2073 
2074     static void
2075 qf_msg(qi)
2076     qf_info_T	*qi;
2077 {
2078     smsg((char_u *)_("error list %d of %d; %d errors"),
2079 	    qi->qf_curlist + 1, qi->qf_listcount,
2080 	    qi->qf_lists[qi->qf_curlist].qf_count);
2081 #ifdef FEAT_WINDOWS
2082     qf_update_buffer(qi);
2083 #endif
2084 }
2085 
2086 /*
2087  * Free error list "idx".
2088  */
2089     static void
2090 qf_free(qi, idx)
2091     qf_info_T	*qi;
2092     int		idx;
2093 {
2094     qfline_T	*qfp;
2095 
2096     while (qi->qf_lists[idx].qf_count)
2097     {
2098 	qfp = qi->qf_lists[idx].qf_start->qf_next;
2099 	vim_free(qi->qf_lists[idx].qf_start->qf_text);
2100 	vim_free(qi->qf_lists[idx].qf_start->qf_pattern);
2101 	vim_free(qi->qf_lists[idx].qf_start);
2102 	qi->qf_lists[idx].qf_start = qfp;
2103 	--qi->qf_lists[idx].qf_count;
2104     }
2105 }
2106 
2107 /*
2108  * qf_mark_adjust: adjust marks
2109  */
2110    void
2111 qf_mark_adjust(wp, line1, line2, amount, amount_after)
2112     win_T	*wp;
2113     linenr_T	line1;
2114     linenr_T	line2;
2115     long	amount;
2116     long	amount_after;
2117 {
2118     int		i;
2119     qfline_T	*qfp;
2120     int		idx;
2121     qf_info_T	*qi = &ql_info;
2122 
2123     if (wp != NULL)
2124     {
2125 	if (wp->w_llist == NULL)
2126 	    return;
2127 	qi = wp->w_llist;
2128     }
2129 
2130     for (idx = 0; idx < qi->qf_listcount; ++idx)
2131 	if (qi->qf_lists[idx].qf_count)
2132 	    for (i = 0, qfp = qi->qf_lists[idx].qf_start;
2133 		       i < qi->qf_lists[idx].qf_count; ++i, qfp = qfp->qf_next)
2134 		if (qfp->qf_fnum == curbuf->b_fnum)
2135 		{
2136 		    if (qfp->qf_lnum >= line1 && qfp->qf_lnum <= line2)
2137 		    {
2138 			if (amount == MAXLNUM)
2139 			    qfp->qf_cleared = TRUE;
2140 			else
2141 			    qfp->qf_lnum += amount;
2142 		    }
2143 		    else if (amount_after && qfp->qf_lnum > line2)
2144 			qfp->qf_lnum += amount_after;
2145 		}
2146 }
2147 
2148 /*
2149  * Make a nice message out of the error character and the error number:
2150  *  char    number	message
2151  *  e or E    0		" error"
2152  *  w or W    0		" warning"
2153  *  i or I    0		" info"
2154  *  0	      0		""
2155  *  other     0		" c"
2156  *  e or E    n		" error n"
2157  *  w or W    n		" warning n"
2158  *  i or I    n		" info n"
2159  *  0	      n		" error n"
2160  *  other     n		" c n"
2161  *  1	      x		""	:helpgrep
2162  */
2163     static char_u *
2164 qf_types(c, nr)
2165     int c, nr;
2166 {
2167     static char_u	buf[20];
2168     static char_u	cc[3];
2169     char_u		*p;
2170 
2171     if (c == 'W' || c == 'w')
2172 	p = (char_u *)" warning";
2173     else if (c == 'I' || c == 'i')
2174 	p = (char_u *)" info";
2175     else if (c == 'E' || c == 'e' || (c == 0 && nr > 0))
2176 	p = (char_u *)" error";
2177     else if (c == 0 || c == 1)
2178 	p = (char_u *)"";
2179     else
2180     {
2181 	cc[0] = ' ';
2182 	cc[1] = c;
2183 	cc[2] = NUL;
2184 	p = cc;
2185     }
2186 
2187     if (nr <= 0)
2188 	return p;
2189 
2190     sprintf((char *)buf, "%s %3d", (char *)p, nr);
2191     return buf;
2192 }
2193 
2194 #if defined(FEAT_WINDOWS) || defined(PROTO)
2195 /*
2196  * ":cwindow": open the quickfix window if we have errors to display,
2197  *	       close it if not.
2198  * ":lwindow": open the location list window if we have locations to display,
2199  *	       close it if not.
2200  */
2201     void
2202 ex_cwindow(eap)
2203     exarg_T	*eap;
2204 {
2205     qf_info_T	*qi = &ql_info;
2206     win_T	*win;
2207 
2208     if (eap->cmdidx == CMD_lwindow)
2209     {
2210 	qi = GET_LOC_LIST(curwin);
2211 	if (qi == NULL)
2212 	    return;
2213     }
2214 
2215     /* Look for an existing quickfix window.  */
2216     win = qf_find_win(qi);
2217 
2218     /*
2219      * If a quickfix window is open but we have no errors to display,
2220      * close the window.  If a quickfix window is not open, then open
2221      * it if we have errors; otherwise, leave it closed.
2222      */
2223     if (qi->qf_lists[qi->qf_curlist].qf_nonevalid
2224 	    || qi->qf_curlist >= qi->qf_listcount)
2225     {
2226 	if (win != NULL)
2227 	    ex_cclose(eap);
2228     }
2229     else if (win == NULL)
2230 	ex_copen(eap);
2231 }
2232 
2233 /*
2234  * ":cclose": close the window showing the list of errors.
2235  * ":lclose": close the window showing the location list
2236  */
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     win_T	*oldwin = curwin;
2271 
2272     if (eap->cmdidx == CMD_lopen || eap->cmdidx == CMD_lwindow)
2273     {
2274 	qi = GET_LOC_LIST(curwin);
2275 	if (qi == NULL)
2276 	{
2277 	    EMSG(_(e_loclist));
2278 	    return;
2279 	}
2280     }
2281 
2282     if (eap->addr_count != 0)
2283 	height = eap->line2;
2284     else
2285 	height = QF_WINHEIGHT;
2286 
2287 #ifdef FEAT_VISUAL
2288     reset_VIsual_and_resel();			/* stop Visual mode */
2289 #endif
2290 #ifdef FEAT_GUI
2291     need_mouse_correct = TRUE;
2292 #endif
2293 
2294     /*
2295      * Find existing quickfix window, or open a new one.
2296      */
2297     win = qf_find_win(qi);
2298 
2299     if (win != NULL && cmdmod.tab == 0)
2300 	win_goto(win);
2301     else
2302     {
2303 	qf_buf = qf_find_buf(qi);
2304 
2305 	/* The current window becomes the previous window afterwards. */
2306 	win = curwin;
2307 
2308 	if (eap->cmdidx == CMD_copen || eap->cmdidx == CMD_cwindow)
2309 	    /* Create the new window at the very bottom. */
2310 	    win_goto(lastwin);
2311 	if (win_split(height, WSP_BELOW | WSP_NEWLOC) == FAIL)
2312 	    return;		/* not enough room for window */
2313 #ifdef FEAT_SCROLLBIND
2314 	curwin->w_p_scb = FALSE;
2315 #endif
2316 
2317 	if (eap->cmdidx == CMD_lopen || eap->cmdidx == CMD_lwindow)
2318 	{
2319 	    /*
2320 	     * For the location list window, create a reference to the
2321 	     * location list from the window 'win'.
2322 	     */
2323 	    curwin->w_llist_ref = win->w_llist;
2324 	    win->w_llist->qf_refcount++;
2325 	}
2326 
2327 	if (oldwin != curwin)
2328 	    oldwin = NULL;  /* don't store info when in another window */
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, oldwin);
2333 	else
2334 	{
2335 	    /* Create a new quickfix buffer */
2336 	    (void)do_ecmd(0, NULL, NULL, NULL, ECMD_ONE, ECMD_HIDE, oldwin);
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 #ifdef FEAT_DIFF
2343 	    curwin->w_p_diff = FALSE;
2344 #endif
2345 #ifdef FEAT_FOLDING
2346 	    set_option_value((char_u *)"fdm", 0L, (char_u *)"manual",
2347 								   OPT_LOCAL);
2348 #endif
2349 	}
2350 
2351 	/* Only set the height when still in the same tab page and there is no
2352 	 * window to the side. */
2353 	if (curtab == prevtab
2354 #ifdef FEAT_VERTSPLIT
2355 		&& curwin->w_width == Columns
2356 #endif
2357 	   )
2358 	    win_setheight(height);
2359 	curwin->w_p_wfh = TRUE;	    /* set 'winfixheight' */
2360 	if (win_valid(win))
2361 	    prevwin = win;
2362     }
2363 
2364     /*
2365      * Fill the buffer with the quickfix list.
2366      */
2367     qf_fill_buffer(qi);
2368 
2369     curwin->w_cursor.lnum = qi->qf_lists[qi->qf_curlist].qf_index;
2370     curwin->w_cursor.col = 0;
2371     check_cursor();
2372     update_topline();		/* scroll to show the line */
2373 }
2374 
2375 /*
2376  * Return the number of the current entry (line number in the quickfix
2377  * window).
2378  */
2379      linenr_T
2380 qf_current_entry(wp)
2381     win_T	*wp;
2382 {
2383     qf_info_T	*qi = &ql_info;
2384 
2385     if (IS_LL_WINDOW(wp))
2386 	/* In the location list window, use the referenced location list */
2387 	qi = wp->w_llist_ref;
2388 
2389     return qi->qf_lists[qi->qf_curlist].qf_index;
2390 }
2391 
2392 /*
2393  * Update the cursor position in the quickfix window to the current error.
2394  * Return TRUE if there is a quickfix window.
2395  */
2396     static int
2397 qf_win_pos_update(qi, old_qf_index)
2398     qf_info_T	*qi;
2399     int		old_qf_index;	/* previous qf_index or zero */
2400 {
2401     win_T	*win;
2402     int		qf_index = qi->qf_lists[qi->qf_curlist].qf_index;
2403 
2404     /*
2405      * Put the cursor on the current error in the quickfix window, so that
2406      * it's viewable.
2407      */
2408     win = qf_find_win(qi);
2409     if (win != NULL
2410 	    && qf_index <= win->w_buffer->b_ml.ml_line_count
2411 	    && old_qf_index != qf_index)
2412     {
2413 	win_T	*old_curwin = curwin;
2414 
2415 	curwin = win;
2416 	curbuf = win->w_buffer;
2417 	if (qf_index > old_qf_index)
2418 	{
2419 	    curwin->w_redraw_top = old_qf_index;
2420 	    curwin->w_redraw_bot = qf_index;
2421 	}
2422 	else
2423 	{
2424 	    curwin->w_redraw_top = qf_index;
2425 	    curwin->w_redraw_bot = old_qf_index;
2426 	}
2427 	curwin->w_cursor.lnum = qf_index;
2428 	curwin->w_cursor.col = 0;
2429 	update_topline();		/* scroll to show the line */
2430 	redraw_later(VALID);
2431 	curwin->w_redr_status = TRUE;	/* update ruler */
2432 	curwin = old_curwin;
2433 	curbuf = curwin->w_buffer;
2434     }
2435     return win != NULL;
2436 }
2437 
2438 /*
2439  * Check whether the given window is displaying the specified quickfix/location
2440  * list buffer
2441  */
2442     static int
2443 is_qf_win(win, qi)
2444     win_T	*win;
2445     qf_info_T	*qi;
2446 {
2447     /*
2448      * A window displaying the quickfix buffer will have the w_llist_ref field
2449      * set to NULL.
2450      * A window displaying a location list buffer will have the w_llist_ref
2451      * pointing to the location list.
2452      */
2453     if (bt_quickfix(win->w_buffer))
2454 	if ((qi == &ql_info && win->w_llist_ref == NULL)
2455 		|| (qi != &ql_info && win->w_llist_ref == qi))
2456 	    return TRUE;
2457 
2458     return FALSE;
2459 }
2460 
2461 /*
2462  * Find a window displaying the quickfix/location list 'qi'
2463  * Searches in only the windows opened in the current tab.
2464  */
2465     static win_T *
2466 qf_find_win(qi)
2467     qf_info_T	*qi;
2468 {
2469     win_T	*win;
2470 
2471     FOR_ALL_WINDOWS(win)
2472 	if (is_qf_win(win, qi))
2473 	    break;
2474 
2475     return win;
2476 }
2477 
2478 /*
2479  * Find a quickfix buffer.
2480  * Searches in windows opened in all the tabs.
2481  */
2482     static buf_T *
2483 qf_find_buf(qi)
2484     qf_info_T	*qi;
2485 {
2486     tabpage_T	*tp;
2487     win_T	*win;
2488 
2489     FOR_ALL_TAB_WINDOWS(tp, win)
2490 	if (is_qf_win(win, qi))
2491 	    return win->w_buffer;
2492 
2493     return NULL;
2494 }
2495 
2496 /*
2497  * Find the quickfix buffer.  If it exists, update the contents.
2498  */
2499     static void
2500 qf_update_buffer(qi)
2501     qf_info_T	*qi;
2502 {
2503     buf_T	*buf;
2504     aco_save_T	aco;
2505 
2506     /* Check if a buffer for the quickfix list exists.  Update it. */
2507     buf = qf_find_buf(qi);
2508     if (buf != NULL)
2509     {
2510 	/* set curwin/curbuf to buf and save a few things */
2511 	aucmd_prepbuf(&aco, buf);
2512 
2513 	qf_fill_buffer(qi);
2514 
2515 	/* restore curwin/curbuf and a few other things */
2516 	aucmd_restbuf(&aco);
2517 
2518 	(void)qf_win_pos_update(qi, 0);
2519     }
2520 }
2521 
2522 /*
2523  * Fill current buffer with quickfix errors, replacing any previous contents.
2524  * curbuf must be the quickfix buffer!
2525  */
2526     static void
2527 qf_fill_buffer(qi)
2528     qf_info_T	*qi;
2529 {
2530     linenr_T	lnum;
2531     qfline_T	*qfp;
2532     buf_T	*errbuf;
2533     int		len;
2534     int		old_KeyTyped = KeyTyped;
2535 
2536     /* delete all existing lines */
2537     while ((curbuf->b_ml.ml_flags & ML_EMPTY) == 0)
2538 	(void)ml_delete((linenr_T)1, FALSE);
2539 
2540     /* Check if there is anything to display */
2541     if (qi->qf_curlist < qi->qf_listcount)
2542     {
2543 	/* Add one line for each error */
2544 	qfp = qi->qf_lists[qi->qf_curlist].qf_start;
2545 	for (lnum = 0; lnum < qi->qf_lists[qi->qf_curlist].qf_count; ++lnum)
2546 	{
2547 	    if (qfp->qf_fnum != 0
2548 		    && (errbuf = buflist_findnr(qfp->qf_fnum)) != NULL
2549 		    && errbuf->b_fname != NULL)
2550 	    {
2551 		if (qfp->qf_type == 1)	/* :helpgrep */
2552 		    STRCPY(IObuff, gettail(errbuf->b_fname));
2553 		else
2554 		    STRCPY(IObuff, errbuf->b_fname);
2555 		len = (int)STRLEN(IObuff);
2556 	    }
2557 	    else
2558 		len = 0;
2559 	    IObuff[len++] = '|';
2560 
2561 	    if (qfp->qf_lnum > 0)
2562 	    {
2563 		sprintf((char *)IObuff + len, "%ld", qfp->qf_lnum);
2564 		len += (int)STRLEN(IObuff + len);
2565 
2566 		if (qfp->qf_col > 0)
2567 		{
2568 		    sprintf((char *)IObuff + len, " col %d", qfp->qf_col);
2569 		    len += (int)STRLEN(IObuff + len);
2570 		}
2571 
2572 		sprintf((char *)IObuff + len, "%s",
2573 				  (char *)qf_types(qfp->qf_type, qfp->qf_nr));
2574 		len += (int)STRLEN(IObuff + len);
2575 	    }
2576 	    else if (qfp->qf_pattern != NULL)
2577 	    {
2578 		qf_fmt_text(qfp->qf_pattern, IObuff + len, IOSIZE - len);
2579 		len += (int)STRLEN(IObuff + len);
2580 	    }
2581 	    IObuff[len++] = '|';
2582 	    IObuff[len++] = ' ';
2583 
2584 	    /* Remove newlines and leading whitespace from the text.
2585 	     * For an unrecognized line keep the indent, the compiler may
2586 	     * mark a word with ^^^^. */
2587 	    qf_fmt_text(len > 3 ? skipwhite(qfp->qf_text) : qfp->qf_text,
2588 						  IObuff + len, IOSIZE - len);
2589 
2590 	    if (ml_append(lnum, IObuff, (colnr_T)STRLEN(IObuff) + 1, FALSE)
2591 								      == FAIL)
2592 		break;
2593 	    qfp = qfp->qf_next;
2594 	}
2595 	/* Delete the empty line which is now at the end */
2596 	(void)ml_delete(lnum + 1, FALSE);
2597     }
2598 
2599     /* correct cursor position */
2600     check_lnums(TRUE);
2601 
2602     /* Set the 'filetype' to "qf" each time after filling the buffer.  This
2603      * resembles reading a file into a buffer, it's more logical when using
2604      * autocommands. */
2605     set_option_value((char_u *)"ft", 0L, (char_u *)"qf", OPT_LOCAL);
2606     curbuf->b_p_ma = FALSE;
2607 
2608 #ifdef FEAT_AUTOCMD
2609     keep_filetype = TRUE;		/* don't detect 'filetype' */
2610     apply_autocmds(EVENT_BUFREADPOST, (char_u *)"quickfix", NULL,
2611 							       FALSE, curbuf);
2612     apply_autocmds(EVENT_BUFWINENTER, (char_u *)"quickfix", NULL,
2613 							       FALSE, curbuf);
2614     keep_filetype = FALSE;
2615 #endif
2616 
2617     /* make sure it will be redrawn */
2618     redraw_curbuf_later(NOT_VALID);
2619 
2620     /* Restore KeyTyped, setting 'filetype' may reset it. */
2621     KeyTyped = old_KeyTyped;
2622 }
2623 
2624 #endif /* FEAT_WINDOWS */
2625 
2626 /*
2627  * Return TRUE if "buf" is the quickfix buffer.
2628  */
2629     int
2630 bt_quickfix(buf)
2631     buf_T	*buf;
2632 {
2633     return (buf->b_p_bt[0] == 'q');
2634 }
2635 
2636 /*
2637  * Return TRUE if "buf" is a "nofile" or "acwrite" buffer.
2638  * This means the buffer name is not a file name.
2639  */
2640     int
2641 bt_nofile(buf)
2642     buf_T	*buf;
2643 {
2644     return (buf->b_p_bt[0] == 'n' && buf->b_p_bt[2] == 'f')
2645 	    || buf->b_p_bt[0] == 'a';
2646 }
2647 
2648 /*
2649  * Return TRUE if "buf" is a "nowrite" or "nofile" buffer.
2650  */
2651     int
2652 bt_dontwrite(buf)
2653     buf_T	*buf;
2654 {
2655     return (buf->b_p_bt[0] == 'n');
2656 }
2657 
2658     int
2659 bt_dontwrite_msg(buf)
2660     buf_T	*buf;
2661 {
2662     if (bt_dontwrite(buf))
2663     {
2664 	EMSG(_("E382: Cannot write, 'buftype' option is set"));
2665 	return TRUE;
2666     }
2667     return FALSE;
2668 }
2669 
2670 /*
2671  * Return TRUE if the buffer should be hidden, according to 'hidden', ":hide"
2672  * and 'bufhidden'.
2673  */
2674     int
2675 buf_hide(buf)
2676     buf_T	*buf;
2677 {
2678     /* 'bufhidden' overrules 'hidden' and ":hide", check it first */
2679     switch (buf->b_p_bh[0])
2680     {
2681 	case 'u':		    /* "unload" */
2682 	case 'w':		    /* "wipe" */
2683 	case 'd': return FALSE;	    /* "delete" */
2684 	case 'h': return TRUE;	    /* "hide" */
2685     }
2686     return (p_hid || cmdmod.hide);
2687 }
2688 
2689 /*
2690  * Return TRUE when using ":vimgrep" for ":grep".
2691  */
2692     int
2693 grep_internal(cmdidx)
2694     cmdidx_T	cmdidx;
2695 {
2696     return ((cmdidx == CMD_grep
2697 		|| cmdidx == CMD_lgrep
2698 		|| cmdidx == CMD_grepadd
2699 		|| cmdidx == CMD_lgrepadd)
2700 	    && STRCMP("internal",
2701 			*curbuf->b_p_gp == NUL ? p_gp : curbuf->b_p_gp) == 0);
2702 }
2703 
2704 /*
2705  * Used for ":make", ":lmake", ":grep", ":lgrep", ":grepadd", and ":lgrepadd"
2706  */
2707     void
2708 ex_make(eap)
2709     exarg_T	*eap;
2710 {
2711     char_u	*fname;
2712     char_u	*cmd;
2713     unsigned	len;
2714     win_T	*wp = NULL;
2715     qf_info_T	*qi = &ql_info;
2716     int		res;
2717 #ifdef FEAT_AUTOCMD
2718     char_u	*au_name = NULL;
2719 
2720     switch (eap->cmdidx)
2721     {
2722 	case CMD_make:	    au_name = (char_u *)"make"; break;
2723 	case CMD_lmake:	    au_name = (char_u *)"lmake"; break;
2724 	case CMD_grep:	    au_name = (char_u *)"grep"; break;
2725 	case CMD_lgrep:	    au_name = (char_u *)"lgrep"; break;
2726 	case CMD_grepadd:   au_name = (char_u *)"grepadd"; break;
2727 	case CMD_lgrepadd:  au_name = (char_u *)"lgrepadd"; break;
2728 	default: break;
2729     }
2730     if (au_name != NULL)
2731     {
2732 	apply_autocmds(EVENT_QUICKFIXCMDPRE, au_name,
2733 					       curbuf->b_fname, TRUE, curbuf);
2734 # ifdef FEAT_EVAL
2735 	if (did_throw || force_abort)
2736 	    return;
2737 # endif
2738     }
2739 #endif
2740 
2741     /* Redirect ":grep" to ":vimgrep" if 'grepprg' is "internal". */
2742     if (grep_internal(eap->cmdidx))
2743     {
2744 	ex_vimgrep(eap);
2745 	return;
2746     }
2747 
2748     if (eap->cmdidx == CMD_lmake || eap->cmdidx == CMD_lgrep
2749 	|| eap->cmdidx == CMD_lgrepadd)
2750 	wp = curwin;
2751 
2752     autowrite_all();
2753     fname = get_mef_name();
2754     if (fname == NULL)
2755 	return;
2756     mch_remove(fname);	    /* in case it's not unique */
2757 
2758     /*
2759      * If 'shellpipe' empty: don't redirect to 'errorfile'.
2760      */
2761     len = (unsigned)STRLEN(p_shq) * 2 + (unsigned)STRLEN(eap->arg) + 1;
2762     if (*p_sp != NUL)
2763 	len += (unsigned)STRLEN(p_sp) + (unsigned)STRLEN(fname) + 3;
2764     cmd = alloc(len);
2765     if (cmd == NULL)
2766 	return;
2767     sprintf((char *)cmd, "%s%s%s", (char *)p_shq, (char *)eap->arg,
2768 							       (char *)p_shq);
2769     if (*p_sp != NUL)
2770 	append_redir(cmd, len, p_sp, fname);
2771     /*
2772      * Output a newline if there's something else than the :make command that
2773      * was typed (in which case the cursor is in column 0).
2774      */
2775     if (msg_col == 0)
2776 	msg_didout = FALSE;
2777     msg_start();
2778     MSG_PUTS(":!");
2779     msg_outtrans(cmd);		/* show what we are doing */
2780 
2781     /* let the shell know if we are redirecting output or not */
2782     do_shell(cmd, *p_sp != NUL ? SHELL_DOOUT : 0);
2783 
2784 #ifdef AMIGA
2785     out_flush();
2786 		/* read window status report and redraw before message */
2787     (void)char_avail();
2788 #endif
2789 
2790     res = qf_init(wp, fname, (eap->cmdidx != CMD_make
2791 			    && eap->cmdidx != CMD_lmake) ? p_gefm : p_efm,
2792 					   (eap->cmdidx != CMD_grepadd
2793 					    && eap->cmdidx != CMD_lgrepadd));
2794 #ifdef FEAT_AUTOCMD
2795     if (au_name != NULL)
2796 	apply_autocmds(EVENT_QUICKFIXCMDPOST, au_name,
2797 					       curbuf->b_fname, TRUE, curbuf);
2798 #endif
2799     if (res > 0 && !eap->forceit)
2800     {
2801 	if (wp != NULL)
2802 	    qi = GET_LOC_LIST(wp);
2803 	qf_jump(qi, 0, 0, FALSE);		/* display first error */
2804     }
2805 
2806     mch_remove(fname);
2807     vim_free(fname);
2808     vim_free(cmd);
2809 }
2810 
2811 /*
2812  * Return the name for the errorfile, in allocated memory.
2813  * Find a new unique name when 'makeef' contains "##".
2814  * Returns NULL for error.
2815  */
2816     static char_u *
2817 get_mef_name()
2818 {
2819     char_u	*p;
2820     char_u	*name;
2821     static int	start = -1;
2822     static int	off = 0;
2823 #ifdef HAVE_LSTAT
2824     struct stat	sb;
2825 #endif
2826 
2827     if (*p_mef == NUL)
2828     {
2829 	name = vim_tempname('e');
2830 	if (name == NULL)
2831 	    EMSG(_(e_notmp));
2832 	return name;
2833     }
2834 
2835     for (p = p_mef; *p; ++p)
2836 	if (p[0] == '#' && p[1] == '#')
2837 	    break;
2838 
2839     if (*p == NUL)
2840 	return vim_strsave(p_mef);
2841 
2842     /* Keep trying until the name doesn't exist yet. */
2843     for (;;)
2844     {
2845 	if (start == -1)
2846 	    start = mch_get_pid();
2847 	else
2848 	    off += 19;
2849 
2850 	name = alloc((unsigned)STRLEN(p_mef) + 30);
2851 	if (name == NULL)
2852 	    break;
2853 	STRCPY(name, p_mef);
2854 	sprintf((char *)name + (p - p_mef), "%d%d", start, off);
2855 	STRCAT(name, p + 2);
2856 	if (mch_getperm(name) < 0
2857 #ifdef HAVE_LSTAT
2858 		    /* Don't accept a symbolic link, its a security risk. */
2859 		    && mch_lstat((char *)name, &sb) < 0
2860 #endif
2861 		)
2862 	    break;
2863 	vim_free(name);
2864     }
2865     return name;
2866 }
2867 
2868 /*
2869  * ":cc", ":crewind", ":cfirst" and ":clast".
2870  * ":ll", ":lrewind", ":lfirst" and ":llast".
2871  */
2872     void
2873 ex_cc(eap)
2874     exarg_T	*eap;
2875 {
2876     qf_info_T	*qi = &ql_info;
2877 
2878     if (eap->cmdidx == CMD_ll
2879 	    || eap->cmdidx == CMD_lrewind
2880 	    || eap->cmdidx == CMD_lfirst
2881 	    || eap->cmdidx == CMD_llast)
2882     {
2883 	qi = GET_LOC_LIST(curwin);
2884 	if (qi == NULL)
2885 	{
2886 	    EMSG(_(e_loclist));
2887 	    return;
2888 	}
2889     }
2890 
2891     qf_jump(qi, 0,
2892 	    eap->addr_count > 0
2893 	    ? (int)eap->line2
2894 	    : (eap->cmdidx == CMD_cc || eap->cmdidx == CMD_ll)
2895 		? 0
2896 		: (eap->cmdidx == CMD_crewind || eap->cmdidx == CMD_lrewind
2897 		   || eap->cmdidx == CMD_cfirst || eap->cmdidx == CMD_lfirst)
2898 		    ? 1
2899 		    : 32767,
2900 	    eap->forceit);
2901 }
2902 
2903 /*
2904  * ":cnext", ":cnfile", ":cNext" and ":cprevious".
2905  * ":lnext", ":lNext", ":lprevious", ":lnfile", ":lNfile" and ":lpfile".
2906  */
2907     void
2908 ex_cnext(eap)
2909     exarg_T	*eap;
2910 {
2911     qf_info_T	*qi = &ql_info;
2912 
2913     if (eap->cmdidx == CMD_lnext
2914 	    || eap->cmdidx == CMD_lNext
2915 	    || eap->cmdidx == CMD_lprevious
2916 	    || eap->cmdidx == CMD_lnfile
2917 	    || eap->cmdidx == CMD_lNfile
2918 	    || eap->cmdidx == CMD_lpfile)
2919     {
2920 	qi = GET_LOC_LIST(curwin);
2921 	if (qi == NULL)
2922 	{
2923 	    EMSG(_(e_loclist));
2924 	    return;
2925 	}
2926     }
2927 
2928     qf_jump(qi, (eap->cmdidx == CMD_cnext || eap->cmdidx == CMD_lnext)
2929 	    ? FORWARD
2930 	    : (eap->cmdidx == CMD_cnfile || eap->cmdidx == CMD_lnfile)
2931 		? FORWARD_FILE
2932 		: (eap->cmdidx == CMD_cpfile || eap->cmdidx == CMD_lpfile
2933 		   || eap->cmdidx == CMD_cNfile || eap->cmdidx == CMD_lNfile)
2934 		    ? BACKWARD_FILE
2935 		    : BACKWARD,
2936 	    eap->addr_count > 0 ? (int)eap->line2 : 1, eap->forceit);
2937 }
2938 
2939 /*
2940  * ":cfile"/":cgetfile"/":caddfile" commands.
2941  * ":lfile"/":lgetfile"/":laddfile" commands.
2942  */
2943     void
2944 ex_cfile(eap)
2945     exarg_T	*eap;
2946 {
2947     win_T	*wp = NULL;
2948     qf_info_T	*qi = &ql_info;
2949 
2950     if (eap->cmdidx == CMD_lfile || eap->cmdidx == CMD_lgetfile
2951 	|| eap->cmdidx == CMD_laddfile)
2952 	wp = curwin;
2953 
2954     if (*eap->arg != NUL)
2955 	set_string_option_direct((char_u *)"ef", -1, eap->arg, OPT_FREE, 0);
2956 
2957     /*
2958      * This function is used by the :cfile, :cgetfile and :caddfile
2959      * commands.
2960      * :cfile always creates a new quickfix list and jumps to the
2961      * first error.
2962      * :cgetfile creates a new quickfix list but doesn't jump to the
2963      * first error.
2964      * :caddfile adds to an existing quickfix list. If there is no
2965      * quickfix list then a new list is created.
2966      */
2967     if (qf_init(wp, p_ef, p_efm, (eap->cmdidx != CMD_caddfile
2968 				  && eap->cmdidx != CMD_laddfile)) > 0
2969 				  && (eap->cmdidx == CMD_cfile
2970 					     || eap->cmdidx == CMD_lfile))
2971     {
2972 	if (wp != NULL)
2973 	    qi = GET_LOC_LIST(wp);
2974 	qf_jump(qi, 0, 0, eap->forceit);	/* display first error */
2975     }
2976 }
2977 
2978 /*
2979  * ":vimgrep {pattern} file(s)"
2980  * ":vimgrepadd {pattern} file(s)"
2981  * ":lvimgrep {pattern} file(s)"
2982  * ":lvimgrepadd {pattern} file(s)"
2983  */
2984     void
2985 ex_vimgrep(eap)
2986     exarg_T	*eap;
2987 {
2988     regmmatch_T	regmatch;
2989     int		fcount;
2990     char_u	**fnames;
2991     char_u	*fname;
2992     char_u	*s;
2993     char_u	*p;
2994     int		fi;
2995     qf_info_T	*qi = &ql_info;
2996     qfline_T	*prevp = NULL;
2997     long	lnum;
2998     buf_T	*buf;
2999     int		duplicate_name = FALSE;
3000     int		using_dummy;
3001     int		redraw_for_dummy = FALSE;
3002     int		found_match;
3003     buf_T	*first_match_buf = NULL;
3004     time_t	seconds = 0;
3005     int		save_mls;
3006 #if defined(FEAT_AUTOCMD) && defined(FEAT_SYN_HL)
3007     char_u	*save_ei = NULL;
3008 #endif
3009     aco_save_T	aco;
3010     int		flags = 0;
3011     colnr_T	col;
3012     long	tomatch;
3013     char_u	dirname_start[MAXPATHL];
3014     char_u	dirname_now[MAXPATHL];
3015     char_u	*target_dir = NULL;
3016 #ifdef FEAT_AUTOCMD
3017     char_u	*au_name =  NULL;
3018 
3019     switch (eap->cmdidx)
3020     {
3021 	case CMD_vimgrep: au_name = (char_u *)"vimgrep"; break;
3022 	case CMD_lvimgrep: au_name = (char_u *)"lvimgrep"; break;
3023 	case CMD_vimgrepadd: au_name = (char_u *)"vimgrepadd"; break;
3024 	case CMD_lvimgrepadd: au_name = (char_u *)"lvimgrepadd"; break;
3025 	default: break;
3026     }
3027     if (au_name != NULL)
3028     {
3029 	apply_autocmds(EVENT_QUICKFIXCMDPRE, au_name,
3030 					       curbuf->b_fname, TRUE, curbuf);
3031 	if (did_throw || force_abort)
3032 	    return;
3033     }
3034 #endif
3035 
3036     if (eap->cmdidx == CMD_lgrep
3037 	    || eap->cmdidx == CMD_lvimgrep
3038 	    || eap->cmdidx == CMD_lgrepadd
3039 	    || eap->cmdidx == CMD_lvimgrepadd)
3040     {
3041 	qi = ll_get_or_alloc_list(curwin);
3042 	if (qi == NULL)
3043 	    return;
3044     }
3045 
3046     if (eap->addr_count > 0)
3047 	tomatch = eap->line2;
3048     else
3049 	tomatch = MAXLNUM;
3050 
3051     /* Get the search pattern: either white-separated or enclosed in // */
3052     regmatch.regprog = NULL;
3053     p = skip_vimgrep_pat(eap->arg, &s, &flags);
3054     if (p == NULL)
3055     {
3056 	EMSG(_(e_invalpat));
3057 	goto theend;
3058     }
3059     regmatch.regprog = vim_regcomp(s, RE_MAGIC);
3060     if (regmatch.regprog == NULL)
3061 	goto theend;
3062     regmatch.rmm_ic = p_ic;
3063     regmatch.rmm_maxcol = 0;
3064 
3065     p = skipwhite(p);
3066     if (*p == NUL)
3067     {
3068 	EMSG(_("E683: File name missing or invalid pattern"));
3069 	goto theend;
3070     }
3071 
3072     if ((eap->cmdidx != CMD_grepadd && eap->cmdidx != CMD_lgrepadd &&
3073 	 eap->cmdidx != CMD_vimgrepadd && eap->cmdidx != CMD_lvimgrepadd)
3074 					|| qi->qf_curlist == qi->qf_listcount)
3075 	/* make place for a new list */
3076 	qf_new_list(qi);
3077     else if (qi->qf_lists[qi->qf_curlist].qf_count > 0)
3078 	/* Adding to existing list, find last entry. */
3079 	for (prevp = qi->qf_lists[qi->qf_curlist].qf_start;
3080 			    prevp->qf_next != prevp; prevp = prevp->qf_next)
3081 	    ;
3082 
3083     /* parse the list of arguments */
3084     if (get_arglist_exp(p, &fcount, &fnames) == FAIL)
3085 	goto theend;
3086     if (fcount == 0)
3087     {
3088 	EMSG(_(e_nomatch));
3089 	goto theend;
3090     }
3091 
3092     /* Remember the current directory, because a BufRead autocommand that does
3093      * ":lcd %:p:h" changes the meaning of short path names. */
3094     mch_dirname(dirname_start, MAXPATHL);
3095 
3096     seconds = (time_t)0;
3097     for (fi = 0; fi < fcount && !got_int && tomatch > 0; ++fi)
3098     {
3099 	fname = shorten_fname1(fnames[fi]);
3100 	if (time(NULL) > seconds)
3101 	{
3102 	    /* Display the file name every second or so, show the user we are
3103 	     * working on it. */
3104 	    seconds = time(NULL);
3105 	    msg_start();
3106 	    p = msg_strtrunc(fname, TRUE);
3107 	    if (p == NULL)
3108 		msg_outtrans(fname);
3109 	    else
3110 	    {
3111 		msg_outtrans(p);
3112 		vim_free(p);
3113 	    }
3114 	    msg_clr_eos();
3115 	    msg_didout = FALSE;	    /* overwrite this message */
3116 	    msg_nowait = TRUE;	    /* don't wait for this message */
3117 	    msg_col = 0;
3118 	    out_flush();
3119 	}
3120 
3121 	buf = buflist_findname_exp(fnames[fi]);
3122 	if (buf == NULL || buf->b_ml.ml_mfp == NULL)
3123 	{
3124 	    /* Remember that a buffer with this name already exists. */
3125 	    duplicate_name = (buf != NULL);
3126 	    using_dummy = TRUE;
3127 	    redraw_for_dummy = TRUE;
3128 
3129 #if defined(FEAT_AUTOCMD) && defined(FEAT_SYN_HL)
3130 	    /* Don't do Filetype autocommands to avoid loading syntax and
3131 	     * indent scripts, a great speed improvement. */
3132 	    save_ei = au_event_disable(",Filetype");
3133 #endif
3134 	    /* Don't use modelines here, it's useless. */
3135 	    save_mls = p_mls;
3136 	    p_mls = 0;
3137 
3138 	    /* Load file into a buffer, so that 'fileencoding' is detected,
3139 	     * autocommands applied, etc. */
3140 	    buf = load_dummy_buffer(fname);
3141 
3142 	    /* When autocommands changed directory: go back.  We assume it was
3143 	     * ":lcd %:p:h". */
3144 	    mch_dirname(dirname_now, MAXPATHL);
3145 	    if (STRCMP(dirname_start, dirname_now) != 0)
3146 	    {
3147 		exarg_T ea;
3148 
3149 		ea.arg = dirname_start;
3150 		ea.cmdidx = CMD_lcd;
3151 		ex_cd(&ea);
3152 	    }
3153 
3154 	    p_mls = save_mls;
3155 #if defined(FEAT_AUTOCMD) && defined(FEAT_SYN_HL)
3156 	    au_event_restore(save_ei);
3157 #endif
3158 	}
3159 	else
3160 	    /* Use existing, loaded buffer. */
3161 	    using_dummy = FALSE;
3162 
3163 	if (buf == NULL)
3164 	{
3165 	    if (!got_int)
3166 		smsg((char_u *)_("Cannot open file \"%s\""), fname);
3167 	}
3168 	else
3169 	{
3170 	    /* Try for a match in all lines of the buffer.
3171 	     * For ":1vimgrep" look for first match only. */
3172 	    found_match = FALSE;
3173 	    for (lnum = 1; lnum <= buf->b_ml.ml_line_count && tomatch > 0;
3174 								       ++lnum)
3175 	    {
3176 		col = 0;
3177 		while (vim_regexec_multi(&regmatch, curwin, buf, lnum,
3178 							       col, NULL) > 0)
3179 		{
3180 		    ;
3181 		    if (qf_add_entry(qi, &prevp,
3182 				NULL,       /* dir */
3183 				fname,
3184 				0,
3185 				ml_get_buf(buf,
3186 				     regmatch.startpos[0].lnum + lnum, FALSE),
3187 				regmatch.startpos[0].lnum + lnum,
3188 				regmatch.startpos[0].col + 1,
3189 				FALSE,      /* vis_col */
3190 				NULL,	    /* search pattern */
3191 				0,	    /* nr */
3192 				0,	    /* type */
3193 				TRUE	    /* valid */
3194 				) == FAIL)
3195 		    {
3196 			got_int = TRUE;
3197 			break;
3198 		    }
3199 		    found_match = TRUE;
3200 		    if (--tomatch == 0)
3201 			break;
3202 		    if ((flags & VGR_GLOBAL) == 0
3203 					       || regmatch.endpos[0].lnum > 0)
3204 			break;
3205 		    col = regmatch.endpos[0].col
3206 					    + (col == regmatch.endpos[0].col);
3207 		    if (col > (colnr_T)STRLEN(ml_get_buf(buf, lnum, FALSE)))
3208 			break;
3209 		}
3210 		line_breakcheck();
3211 		if (got_int)
3212 		    break;
3213 	    }
3214 
3215 	    if (using_dummy)
3216 	    {
3217 		if (found_match && first_match_buf == NULL)
3218 		    first_match_buf = buf;
3219 		if (duplicate_name)
3220 		{
3221 		    /* Never keep a dummy buffer if there is another buffer
3222 		     * with the same name. */
3223 		    wipe_dummy_buffer(buf);
3224 		    buf = NULL;
3225 		}
3226 		else if (!cmdmod.hide
3227 			    || buf->b_p_bh[0] == 'u'	/* "unload" */
3228 			    || buf->b_p_bh[0] == 'w'	/* "wipe" */
3229 			    || buf->b_p_bh[0] == 'd')	/* "delete" */
3230 		{
3231 		    /* When no match was found we don't need to remember the
3232 		     * buffer, wipe it out.  If there was a match and it
3233 		     * wasn't the first one or we won't jump there: only
3234 		     * unload the buffer.
3235 		     * Ignore 'hidden' here, because it may lead to having too
3236 		     * many swap files. */
3237 		    if (!found_match)
3238 		    {
3239 			wipe_dummy_buffer(buf);
3240 			buf = NULL;
3241 		    }
3242 		    else if (buf != first_match_buf || (flags & VGR_NOJUMP))
3243 		    {
3244 			unload_dummy_buffer(buf);
3245 			buf = NULL;
3246 		    }
3247 		}
3248 
3249 		if (buf != NULL)
3250 		{
3251 		    /* If the buffer is still loaded we need to use the
3252 		     * directory we jumped to below. */
3253 		    if (buf == first_match_buf
3254 			    && target_dir == NULL
3255 			    && STRCMP(dirname_start, dirname_now) != 0)
3256 			target_dir = vim_strsave(dirname_now);
3257 
3258 		    /* The buffer is still loaded, the Filetype autocommands
3259 		     * need to be done now, in that buffer.  And the modelines
3260 		     * need to be done (again).  But not the window-local
3261 		     * options! */
3262 		    aucmd_prepbuf(&aco, buf);
3263 #if defined(FEAT_AUTOCMD) && defined(FEAT_SYN_HL)
3264 		    apply_autocmds(EVENT_FILETYPE, buf->b_p_ft,
3265 						     buf->b_fname, TRUE, buf);
3266 #endif
3267 		    do_modelines(OPT_NOWIN);
3268 		    aucmd_restbuf(&aco);
3269 		}
3270 	    }
3271 	}
3272     }
3273 
3274     FreeWild(fcount, fnames);
3275 
3276     qi->qf_lists[qi->qf_curlist].qf_nonevalid = FALSE;
3277     qi->qf_lists[qi->qf_curlist].qf_ptr = qi->qf_lists[qi->qf_curlist].qf_start;
3278     qi->qf_lists[qi->qf_curlist].qf_index = 1;
3279 
3280 #ifdef FEAT_WINDOWS
3281     qf_update_buffer(qi);
3282 #endif
3283 
3284 #ifdef FEAT_AUTOCMD
3285     if (au_name != NULL)
3286 	apply_autocmds(EVENT_QUICKFIXCMDPOST, au_name,
3287 					       curbuf->b_fname, TRUE, curbuf);
3288 #endif
3289 
3290     /* Jump to first match. */
3291     if (qi->qf_lists[qi->qf_curlist].qf_count > 0)
3292     {
3293 	if ((flags & VGR_NOJUMP) == 0)
3294 	{
3295 	    buf = curbuf;
3296 	    qf_jump(qi, 0, 0, eap->forceit);
3297 	    if (buf != curbuf)
3298 		/* If we jumped to another buffer redrawing will already be
3299 		 * taken care of. */
3300 		redraw_for_dummy = FALSE;
3301 
3302 	    /* Jump to the directory used after loading the buffer. */
3303 	    if (curbuf == first_match_buf && target_dir != NULL)
3304 	    {
3305 		exarg_T ea;
3306 
3307 		ea.arg = target_dir;
3308 		ea.cmdidx = CMD_lcd;
3309 		ex_cd(&ea);
3310 	    }
3311 	}
3312     }
3313     else
3314 	EMSG2(_(e_nomatch2), s);
3315 
3316     /* If we loaded a dummy buffer into the current window, the autocommands
3317      * may have messed up things, need to redraw and recompute folds. */
3318     if (redraw_for_dummy)
3319     {
3320 #ifdef FEAT_FOLDING
3321 	foldUpdateAll(curwin);
3322 #else
3323 	redraw_later(NOT_VALID);
3324 #endif
3325     }
3326 
3327 theend:
3328     vim_free(target_dir);
3329     vim_free(regmatch.regprog);
3330 }
3331 
3332 /*
3333  * Skip over the pattern argument of ":vimgrep /pat/[g][j]".
3334  * Put the start of the pattern in "*s", unless "s" is NULL.
3335  * If "flags" is not NULL put the flags in it: VGR_GLOBAL, VGR_NOJUMP.
3336  * If "s" is not NULL terminate the pattern with a NUL.
3337  * Return a pointer to the char just past the pattern plus flags.
3338  */
3339     char_u *
3340 skip_vimgrep_pat(p, s, flags)
3341     char_u  *p;
3342     char_u  **s;
3343     int	    *flags;
3344 {
3345     int		c;
3346 
3347     if (vim_isIDc(*p))
3348     {
3349 	/* ":vimgrep pattern fname" */
3350 	if (s != NULL)
3351 	    *s = p;
3352 	p = skiptowhite(p);
3353 	if (s != NULL && *p != NUL)
3354 	    *p++ = NUL;
3355     }
3356     else
3357     {
3358 	/* ":vimgrep /pattern/[g][j] fname" */
3359 	if (s != NULL)
3360 	    *s = p + 1;
3361 	c = *p;
3362 	p = skip_regexp(p + 1, c, TRUE, NULL);
3363 	if (*p != c)
3364 	    return NULL;
3365 
3366 	/* Truncate the pattern. */
3367 	if (s != NULL)
3368 	    *p = NUL;
3369 	++p;
3370 
3371 	/* Find the flags */
3372 	while (*p == 'g' || *p == 'j')
3373 	{
3374 	    if (flags != NULL)
3375 	    {
3376 		if (*p == 'g')
3377 		    *flags |= VGR_GLOBAL;
3378 		else
3379 		    *flags |= VGR_NOJUMP;
3380 	    }
3381 	    ++p;
3382 	}
3383     }
3384     return p;
3385 }
3386 
3387 /*
3388  * Load file "fname" into a dummy buffer and return the buffer pointer.
3389  * Returns NULL if it fails.
3390  * Must call unload_dummy_buffer() or wipe_dummy_buffer() later!
3391  */
3392     static buf_T *
3393 load_dummy_buffer(fname)
3394     char_u	*fname;
3395 {
3396     buf_T	*newbuf;
3397     int		failed = TRUE;
3398     aco_save_T	aco;
3399 
3400     /* Allocate a buffer without putting it in the buffer list. */
3401     newbuf = buflist_new(NULL, NULL, (linenr_T)1, BLN_DUMMY);
3402     if (newbuf == NULL)
3403 	return NULL;
3404 
3405     /* Init the options. */
3406     buf_copy_options(newbuf, BCO_ENTER | BCO_NOHELP);
3407 
3408     /* need to open the memfile before putting the buffer in a window */
3409     if (ml_open(newbuf) == OK)
3410     {
3411 	/* set curwin/curbuf to buf and save a few things */
3412 	aucmd_prepbuf(&aco, newbuf);
3413 
3414 	/* Need to set the filename for autocommands. */
3415 	(void)setfname(curbuf, fname, NULL, FALSE);
3416 
3417 	/* Create swap file now to avoid the ATTENTION message. */
3418 	check_need_swap(TRUE);
3419 
3420 	/* Remove the "dummy" flag, otherwise autocommands may not
3421 	 * work. */
3422 	curbuf->b_flags &= ~BF_DUMMY;
3423 
3424 	if (readfile(fname, NULL,
3425 		    (linenr_T)0, (linenr_T)0, (linenr_T)MAXLNUM,
3426 		    NULL, READ_NEW | READ_DUMMY) == OK
3427 		&& !got_int
3428 		&& !(curbuf->b_flags & BF_NEW))
3429 	{
3430 	    failed = FALSE;
3431 	    if (curbuf != newbuf)
3432 	    {
3433 		/* Bloody autocommands changed the buffer! */
3434 		if (buf_valid(newbuf))
3435 		    wipe_buffer(newbuf, FALSE);
3436 		newbuf = curbuf;
3437 	    }
3438 	}
3439 
3440 	/* restore curwin/curbuf and a few other things */
3441 	aucmd_restbuf(&aco);
3442     }
3443 
3444     if (!buf_valid(newbuf))
3445 	return NULL;
3446     if (failed)
3447     {
3448 	wipe_dummy_buffer(newbuf);
3449 	return NULL;
3450     }
3451     return newbuf;
3452 }
3453 
3454 /*
3455  * Wipe out the dummy buffer that load_dummy_buffer() created.
3456  */
3457     static void
3458 wipe_dummy_buffer(buf)
3459     buf_T	*buf;
3460 {
3461     if (curbuf != buf)		/* safety check */
3462     {
3463 #if defined(FEAT_AUTOCMD) && defined(FEAT_EVAL)
3464 	cleanup_T   cs;
3465 
3466 	/* Reset the error/interrupt/exception state here so that aborting()
3467 	 * returns FALSE when wiping out the buffer.  Otherwise it doesn't
3468 	 * work when got_int is set. */
3469 	enter_cleanup(&cs);
3470 #endif
3471 
3472 	wipe_buffer(buf, FALSE);
3473 
3474 #if defined(FEAT_AUTOCMD) && defined(FEAT_EVAL)
3475 	/* Restore the error/interrupt/exception state if not discarded by a
3476 	 * new aborting error, interrupt, or uncaught exception. */
3477 	leave_cleanup(&cs);
3478 #endif
3479     }
3480 }
3481 
3482 /*
3483  * Unload the dummy buffer that load_dummy_buffer() created.
3484  */
3485     static void
3486 unload_dummy_buffer(buf)
3487     buf_T	*buf;
3488 {
3489     if (curbuf != buf)		/* safety check */
3490 	close_buffer(NULL, buf, DOBUF_UNLOAD);
3491 }
3492 
3493 #if defined(FEAT_EVAL) || defined(PROTO)
3494 /*
3495  * Add each quickfix error to list "list" as a dictionary.
3496  */
3497     int
3498 get_errorlist(wp, list)
3499     win_T	*wp;
3500     list_T	*list;
3501 {
3502     qf_info_T	*qi = &ql_info;
3503     dict_T	*dict;
3504     char_u	buf[2];
3505     qfline_T	*qfp;
3506     int		i;
3507     int		bufnum;
3508 
3509     if (wp != NULL)
3510     {
3511 	qi = GET_LOC_LIST(wp);
3512 	if (qi == NULL)
3513 	    return FAIL;
3514     }
3515 
3516     if (qi->qf_curlist >= qi->qf_listcount
3517 	    || qi->qf_lists[qi->qf_curlist].qf_count == 0)
3518 	return FAIL;
3519 
3520     qfp = qi->qf_lists[qi->qf_curlist].qf_start;
3521     for (i = 1; !got_int && i <= qi->qf_lists[qi->qf_curlist].qf_count; ++i)
3522     {
3523 	/* Handle entries with a non-existing buffer number. */
3524 	bufnum = qfp->qf_fnum;
3525 	if (bufnum != 0 && (buflist_findnr(bufnum) == NULL))
3526 	    bufnum = 0;
3527 
3528 	if ((dict = dict_alloc()) == NULL)
3529 	    return FAIL;
3530 	if (list_append_dict(list, dict) == FAIL)
3531 	    return FAIL;
3532 
3533 	buf[0] = qfp->qf_type;
3534 	buf[1] = NUL;
3535 	if ( dict_add_nr_str(dict, "bufnr", (long)bufnum, NULL) == FAIL
3536 	  || dict_add_nr_str(dict, "lnum",  (long)qfp->qf_lnum, NULL) == FAIL
3537 	  || dict_add_nr_str(dict, "col",   (long)qfp->qf_col, NULL) == FAIL
3538 	  || dict_add_nr_str(dict, "vcol",  (long)qfp->qf_viscol, NULL) == FAIL
3539 	  || dict_add_nr_str(dict, "nr",    (long)qfp->qf_nr, NULL) == FAIL
3540 	  || dict_add_nr_str(dict, "pattern",  0L,
3541 	     qfp->qf_pattern == NULL ? (char_u *)"" : qfp->qf_pattern) == FAIL
3542 	  || dict_add_nr_str(dict, "text",  0L,
3543 		   qfp->qf_text == NULL ? (char_u *)"" : qfp->qf_text) == FAIL
3544 	  || dict_add_nr_str(dict, "type",  0L, buf) == FAIL
3545 	  || dict_add_nr_str(dict, "valid", (long)qfp->qf_valid, NULL) == FAIL)
3546 	    return FAIL;
3547 
3548 	qfp = qfp->qf_next;
3549     }
3550     return OK;
3551 }
3552 
3553 /*
3554  * Populate the quickfix list with the items supplied in the list
3555  * of dictionaries.
3556  */
3557     int
3558 set_errorlist(wp, list, action)
3559     win_T	*wp;
3560     list_T	*list;
3561     int		action;
3562 {
3563     listitem_T	*li;
3564     dict_T	*d;
3565     char_u	*filename, *pattern, *text, *type;
3566     int		bufnum;
3567     long	lnum;
3568     int		col, nr;
3569     int		vcol;
3570     qfline_T	*prevp = NULL;
3571     int		valid, status;
3572     int		retval = OK;
3573     qf_info_T	*qi = &ql_info;
3574     int		did_bufnr_emsg = FALSE;
3575 
3576     if (wp != NULL)
3577     {
3578 	qi = ll_get_or_alloc_list(wp);
3579 	if (qi == NULL)
3580 	    return FAIL;
3581     }
3582 
3583     if (action == ' ' || qi->qf_curlist == qi->qf_listcount)
3584 	/* make place for a new list */
3585 	qf_new_list(qi);
3586     else if (action == 'a' && qi->qf_lists[qi->qf_curlist].qf_count > 0)
3587 	/* Adding to existing list, find last entry. */
3588 	for (prevp = qi->qf_lists[qi->qf_curlist].qf_start;
3589 	     prevp->qf_next != prevp; prevp = prevp->qf_next)
3590 	    ;
3591     else if (action == 'r')
3592 	qf_free(qi, qi->qf_curlist);
3593 
3594     for (li = list->lv_first; li != NULL; li = li->li_next)
3595     {
3596 	if (li->li_tv.v_type != VAR_DICT)
3597 	    continue; /* Skip non-dict items */
3598 
3599 	d = li->li_tv.vval.v_dict;
3600 	if (d == NULL)
3601 	    continue;
3602 
3603 	filename = get_dict_string(d, (char_u *)"filename", TRUE);
3604 	bufnum = get_dict_number(d, (char_u *)"bufnr");
3605 	lnum = get_dict_number(d, (char_u *)"lnum");
3606 	col = get_dict_number(d, (char_u *)"col");
3607 	vcol = get_dict_number(d, (char_u *)"vcol");
3608 	nr = get_dict_number(d, (char_u *)"nr");
3609 	type = get_dict_string(d, (char_u *)"type", TRUE);
3610 	pattern = get_dict_string(d, (char_u *)"pattern", TRUE);
3611 	text = get_dict_string(d, (char_u *)"text", TRUE);
3612 	if (text == NULL)
3613 	    text = vim_strsave((char_u *)"");
3614 
3615 	valid = TRUE;
3616 	if ((filename == NULL && bufnum == 0) || (lnum == 0 && pattern == NULL))
3617 	    valid = FALSE;
3618 
3619 	/* Mark entries with non-existing buffer number as not valid. Give the
3620 	 * error message only once. */
3621 	if (bufnum != 0 && (buflist_findnr(bufnum) == NULL))
3622 	{
3623 	    if (!did_bufnr_emsg)
3624 	    {
3625 		did_bufnr_emsg = TRUE;
3626 		EMSGN(_("E92: Buffer %ld not found"), bufnum);
3627 	    }
3628 	    valid = FALSE;
3629 	    bufnum = 0;
3630 	}
3631 
3632 	status =  qf_add_entry(qi, &prevp,
3633 			       NULL,	    /* dir */
3634 			       filename,
3635 			       bufnum,
3636 			       text,
3637 			       lnum,
3638 			       col,
3639 			       vcol,	    /* vis_col */
3640 			       pattern,	    /* search pattern */
3641 			       nr,
3642 			       type == NULL ? NUL : *type,
3643 			       valid);
3644 
3645 	vim_free(filename);
3646 	vim_free(pattern);
3647 	vim_free(text);
3648 	vim_free(type);
3649 
3650 	if (status == FAIL)
3651 	{
3652 	    retval = FAIL;
3653 	    break;
3654 	}
3655     }
3656 
3657     if (qi->qf_lists[qi->qf_curlist].qf_index == 0)
3658 	/* empty list or no valid entry */
3659 	qi->qf_lists[qi->qf_curlist].qf_nonevalid = TRUE;
3660     else
3661 	qi->qf_lists[qi->qf_curlist].qf_nonevalid = FALSE;
3662     qi->qf_lists[qi->qf_curlist].qf_ptr = qi->qf_lists[qi->qf_curlist].qf_start;
3663     qi->qf_lists[qi->qf_curlist].qf_index = 1;
3664 
3665 #ifdef FEAT_WINDOWS
3666     qf_update_buffer(qi);
3667 #endif
3668 
3669     return retval;
3670 }
3671 #endif
3672 
3673 /*
3674  * ":[range]cbuffer [bufnr]" command.
3675  * ":[range]caddbuffer [bufnr]" command.
3676  * ":[range]cgetbuffer [bufnr]" command.
3677  * ":[range]lbuffer [bufnr]" command.
3678  * ":[range]laddbuffer [bufnr]" command.
3679  * ":[range]lgetbuffer [bufnr]" command.
3680  */
3681     void
3682 ex_cbuffer(eap)
3683     exarg_T   *eap;
3684 {
3685     buf_T	*buf = NULL;
3686     qf_info_T	*qi = &ql_info;
3687 
3688     if (eap->cmdidx == CMD_lbuffer || eap->cmdidx == CMD_lgetbuffer
3689 	    || eap->cmdidx == CMD_laddbuffer)
3690     {
3691 	qi = ll_get_or_alloc_list(curwin);
3692 	if (qi == NULL)
3693 	    return;
3694     }
3695 
3696     if (*eap->arg == NUL)
3697 	buf = curbuf;
3698     else if (*skipwhite(skipdigits(eap->arg)) == NUL)
3699 	buf = buflist_findnr(atoi((char *)eap->arg));
3700     if (buf == NULL)
3701 	EMSG(_(e_invarg));
3702     else if (buf->b_ml.ml_mfp == NULL)
3703 	EMSG(_("E681: Buffer is not loaded"));
3704     else
3705     {
3706 	if (eap->addr_count == 0)
3707 	{
3708 	    eap->line1 = 1;
3709 	    eap->line2 = buf->b_ml.ml_line_count;
3710 	}
3711 	if (eap->line1 < 1 || eap->line1 > buf->b_ml.ml_line_count
3712 		|| eap->line2 < 1 || eap->line2 > buf->b_ml.ml_line_count)
3713 	    EMSG(_(e_invrange));
3714 	else
3715 	{
3716 	    if (qf_init_ext(qi, NULL, buf, NULL, p_efm,
3717 			    (eap->cmdidx != CMD_caddbuffer
3718 			     && eap->cmdidx != CMD_laddbuffer),
3719 						   eap->line1, eap->line2) > 0
3720 		    && (eap->cmdidx == CMD_cbuffer
3721 			|| eap->cmdidx == CMD_lbuffer))
3722 		qf_jump(qi, 0, 0, eap->forceit);  /* display first error */
3723 	}
3724     }
3725 }
3726 
3727 #if defined(FEAT_EVAL) || defined(PROTO)
3728 /*
3729  * ":cexpr {expr}", ":cgetexpr {expr}", ":caddexpr {expr}" command.
3730  * ":lexpr {expr}", ":lgetexpr {expr}", ":laddexpr {expr}" command.
3731  */
3732     void
3733 ex_cexpr(eap)
3734     exarg_T	*eap;
3735 {
3736     typval_T	*tv;
3737     qf_info_T	*qi = &ql_info;
3738 
3739     if (eap->cmdidx == CMD_lexpr || eap->cmdidx == CMD_lgetexpr
3740 	    || eap->cmdidx == CMD_laddexpr)
3741     {
3742 	qi = ll_get_or_alloc_list(curwin);
3743 	if (qi == NULL)
3744 	    return;
3745     }
3746 
3747     /* Evaluate the expression.  When the result is a string or a list we can
3748      * use it to fill the errorlist. */
3749     tv = eval_expr(eap->arg, NULL);
3750     if (tv != NULL)
3751     {
3752 	if ((tv->v_type == VAR_STRING && tv->vval.v_string != NULL)
3753 		|| (tv->v_type == VAR_LIST && tv->vval.v_list != NULL))
3754 	{
3755 	    if (qf_init_ext(qi, NULL, NULL, tv, p_efm,
3756 			    (eap->cmdidx != CMD_caddexpr
3757 			     && eap->cmdidx != CMD_laddexpr),
3758 						 (linenr_T)0, (linenr_T)0) > 0
3759 		    && (eap->cmdidx == CMD_cexpr
3760 			|| eap->cmdidx == CMD_lexpr))
3761 		qf_jump(qi, 0, 0, eap->forceit);  /* display first error */
3762 	}
3763 	else
3764 	    EMSG(_("E777: String or List expected"));
3765 	free_tv(tv);
3766     }
3767 }
3768 #endif
3769 
3770 /*
3771  * ":helpgrep {pattern}"
3772  */
3773     void
3774 ex_helpgrep(eap)
3775     exarg_T	*eap;
3776 {
3777     regmatch_T	regmatch;
3778     char_u	*save_cpo;
3779     char_u	*p;
3780     int		fcount;
3781     char_u	**fnames;
3782     FILE	*fd;
3783     int		fi;
3784     qfline_T	*prevp = NULL;
3785     long	lnum;
3786 #ifdef FEAT_MULTI_LANG
3787     char_u	*lang;
3788 #endif
3789     qf_info_T	*qi = &ql_info;
3790     int		new_qi = FALSE;
3791     win_T	*wp;
3792 
3793     /* Make 'cpoptions' empty, the 'l' flag should not be used here. */
3794     save_cpo = p_cpo;
3795     p_cpo = empty_option;
3796 
3797 #ifdef FEAT_MULTI_LANG
3798     /* Check for a specified language */
3799     lang = check_help_lang(eap->arg);
3800 #endif
3801 
3802     if (eap->cmdidx == CMD_lhelpgrep)
3803     {
3804 	/* Find an existing help window */
3805 	FOR_ALL_WINDOWS(wp)
3806 	    if (wp->w_buffer != NULL && wp->w_buffer->b_help)
3807 		break;
3808 
3809 	if (wp == NULL)	    /* Help window not found */
3810 	    qi = NULL;
3811 	else
3812 	    qi = wp->w_llist;
3813 
3814 	if (qi == NULL)
3815 	{
3816 	    /* Allocate a new location list for help text matches */
3817 	    if ((qi = ll_new_list()) == NULL)
3818 		return;
3819 	    new_qi = TRUE;
3820 	}
3821     }
3822 
3823     regmatch.regprog = vim_regcomp(eap->arg, RE_MAGIC + RE_STRING);
3824     regmatch.rm_ic = FALSE;
3825     if (regmatch.regprog != NULL)
3826     {
3827 	/* create a new quickfix list */
3828 	qf_new_list(qi);
3829 
3830 	/* Go through all directories in 'runtimepath' */
3831 	p = p_rtp;
3832 	while (*p != NUL && !got_int)
3833 	{
3834 	    copy_option_part(&p, NameBuff, MAXPATHL, ",");
3835 
3836 	    /* Find all "*.txt" and "*.??x" files in the "doc" directory. */
3837 	    add_pathsep(NameBuff);
3838 	    STRCAT(NameBuff, "doc/*.\\(txt\\|??x\\)");
3839 	    if (gen_expand_wildcards(1, &NameBuff, &fcount,
3840 					     &fnames, EW_FILE|EW_SILENT) == OK
3841 		    && fcount > 0)
3842 	    {
3843 		for (fi = 0; fi < fcount && !got_int; ++fi)
3844 		{
3845 #ifdef FEAT_MULTI_LANG
3846 		    /* Skip files for a different language. */
3847 		    if (lang != NULL
3848 			    && STRNICMP(lang, fnames[fi]
3849 					    + STRLEN(fnames[fi]) - 3, 2) != 0
3850 			    && !(STRNICMP(lang, "en", 2) == 0
3851 				&& STRNICMP("txt", fnames[fi]
3852 					   + STRLEN(fnames[fi]) - 3, 3) == 0))
3853 			    continue;
3854 #endif
3855 		    fd = mch_fopen((char *)fnames[fi], "r");
3856 		    if (fd != NULL)
3857 		    {
3858 			lnum = 1;
3859 			while (!vim_fgets(IObuff, IOSIZE, fd) && !got_int)
3860 			{
3861 			    if (vim_regexec(&regmatch, IObuff, (colnr_T)0))
3862 			    {
3863 				int	l = (int)STRLEN(IObuff);
3864 
3865 				/* remove trailing CR, LF, spaces, etc. */
3866 				while (l > 0 && IObuff[l - 1] <= ' ')
3867 				     IObuff[--l] = NUL;
3868 
3869 				if (qf_add_entry(qi, &prevp,
3870 					    NULL,	/* dir */
3871 					    fnames[fi],
3872 					    0,
3873 					    IObuff,
3874 					    lnum,
3875 					    (int)(regmatch.startp[0] - IObuff)
3876 								+ 1, /* col */
3877 					    FALSE,	/* vis_col */
3878 					    NULL,	/* search pattern */
3879 					    0,		/* nr */
3880 					    1,		/* type */
3881 					    TRUE	/* valid */
3882 					    ) == FAIL)
3883 				{
3884 				    got_int = TRUE;
3885 				    break;
3886 				}
3887 			    }
3888 			    ++lnum;
3889 			    line_breakcheck();
3890 			}
3891 			fclose(fd);
3892 		    }
3893 		}
3894 		FreeWild(fcount, fnames);
3895 	    }
3896 	}
3897 	vim_free(regmatch.regprog);
3898 
3899 	qi->qf_lists[qi->qf_curlist].qf_nonevalid = FALSE;
3900 	qi->qf_lists[qi->qf_curlist].qf_ptr =
3901 	    qi->qf_lists[qi->qf_curlist].qf_start;
3902 	qi->qf_lists[qi->qf_curlist].qf_index = 1;
3903     }
3904 
3905     if (p_cpo == empty_option)
3906 	p_cpo = save_cpo;
3907     else
3908 	/* Darn, some plugin changed the value. */
3909 	free_string_option(save_cpo);
3910 
3911 #ifdef FEAT_WINDOWS
3912     qf_update_buffer(qi);
3913 #endif
3914 
3915     /* Jump to first match. */
3916     if (qi->qf_lists[qi->qf_curlist].qf_count > 0)
3917 	qf_jump(qi, 0, 0, FALSE);
3918     else
3919 	EMSG2(_(e_nomatch2), eap->arg);
3920 
3921     if (eap->cmdidx == CMD_lhelpgrep)
3922     {
3923 	/* If the help window is not opened or if it already points to the
3924 	 * correct location list, then free the new location list. */
3925 	if (!curwin->w_buffer->b_help || curwin->w_llist == qi)
3926 	{
3927 	    if (new_qi)
3928 		ll_free_all(&qi);
3929 	}
3930 	else if (curwin->w_llist == NULL)
3931 	    curwin->w_llist = qi;
3932     }
3933 }
3934 
3935 #endif /* FEAT_QUICKFIX */
3936