qf_win_pos_update(
    qf_info_T	*qi,
    int		old_qf_index)	// previous qf_index or zero
{
    win_T	*win;
    int		qf_index = qf_get_curlist(qi)->qf_index;

    // Put the cursor on the current error in the quickfix window, so that
    // it's viewable.
    win = qf_find_win(qi);
    if (win != NULL
	    && qf_index <= win->w_buffer->b_ml.ml_line_count
	    && old_qf_index != qf_index)
    {
	if (qf_index > old_qf_index)
	{
	    win->w_redraw_top = old_qf_index;
	    win->w_redraw_bot = qf_index;
	}
	else
	{
	    win->w_redraw_top = qf_index;
	    win->w_redraw_bot = old_qf_index;
	}
	qf_win_goto(win, qf_index);
    }
    return win != NULL;
}


make_get_fullcmd(char_u *makecmd, char_u *fname)
{
    char_u	*cmd;
    unsigned	len;

    len = (unsigned)STRLEN(p_shq) * 2 + (unsigned)STRLEN(makecmd) + 1;
    if (*p_sp != NUL)
	len += (unsigned)STRLEN(p_sp) + (unsigned)STRLEN(fname) + 3;
    cmd = alloc_id(len, aid_qf_makecmd);
    if (cmd == NULL)
	return NULL;
    sprintf((char *)cmd, "%s%s%s", (char *)p_shq, (char *)makecmd,
							       (char *)p_shq);

    // If 'shellpipe' empty: don't redirect to 'errorfile'.
    if (*p_sp != NUL)
	append_redir(cmd, len, p_sp, fname);

    // Display the fully formed command.  Output a newline if there's something
    // else than the :make command that was typed (in which case the cursor is
    // in column 0).
    if (msg_col == 0)
	msg_didout = FALSE;
    msg_start();
    msg_puts(":!");
    msg_outtrans(cmd);		// show what we are doing

    return cmd;
}

patch 9.0.0260: using freed memory when using 'quickfixtextfunc' recursively

Problem:    Using freed memory when using 'quickfixtextfunc' recursively.
Solution:   Do not allow for recursion.


qf_getprop_qftf(qf_list_T *qfl, dict_T *retdict)
{
    int		status;

    if (qfl->qf_qftf_cb.cb_name != NULL)
    {
	typval_T	tv;

	put_callback(&qfl->qf_qftf_cb, &tv);
	status = dict_add_tv(retdict, "quickfixtextfunc", &tv);
	clear_tv(&tv);
    }
    else
	status = dict_add_string(retdict, "quickfixtextfunc", (char_u *)"");

    return status;
}


qf_free_all(win_T *wp)
{
    int		i;
    qf_info_T	*qi = &ql_info;

    if (wp != NULL)
    {
	// location list
	ll_free_all(&wp->w_llist);
	ll_free_all(&wp->w_llist_ref);
    }
    else
	// quickfix list
	for (i = 0; i < qi->qf_listcount; ++i)
	    qf_free(qf_get_list(qi, i));
}


qf_history(exarg_T *eap)
{
    qf_info_T	*qi = qf_cmd_get_stack(eap, FALSE);
    int		i;

    if (eap->addr_count > 0)
    {
	if (qi == NULL)
	{
	    emsg(_(e_no_location_list));
	    return;
	}

	// Jump to the specified quickfix list
	if (eap->line2 > 0 && eap->line2 <= qi->qf_listcount)
	{
	    qi->qf_curlist = eap->line2 - 1;
	    qf_msg(qi, qi->qf_curlist, "");
	    qf_update_buffer(qi, NULL);
	}
	else
	    emsg(_(e_invalid_range));

	return;
    }

    if (qf_stack_empty(qi))
	msg(_("No entries"));
    else
	for (i = 0; i < qi->qf_listcount; ++i)
	    qf_msg(qi, i, i == qi->qf_curlist ? "> " : "  ");
}


qf_get_list(qf_info_T *qi, int idx)
{
    return &qi->qf_lists[idx];
}


qf_cmd_get_or_alloc_stack(exarg_T *eap, win_T **pwinp)
{
    qf_info_T	*qi = &ql_info;

    if (is_loclist_cmd(eap->cmdidx))
    {
	qi = ll_get_or_alloc_list(curwin);
	if (qi == NULL)
	    return NULL;
	*pwinp = curwin;
    }

    return qi;
}


qf_stack_get_bufnr(void)
{
    return ql_info.qf_bufnr;
}


qf_get_fnum(qf_list_T *qfl, char_u *directory, char_u *fname)
{
    char_u	*ptr = NULL;
    buf_T	*buf;
    char_u	*bufname;

    if (fname == NULL || *fname == NUL)		// no file name
	return 0;

#ifdef VMS
    vms_remove_version(fname);
#endif
#ifdef BACKSLASH_IN_FILENAME
    if (directory != NULL)
	slash_adjust(directory);
    slash_adjust(fname);
#endif
    if (directory != NULL && !vim_isAbsName(fname)
	    && (ptr = concat_fnames(directory, fname, TRUE)) != NULL)
    {
	// Here we check if the file really exists.
	// This should normally be true, but if make works without
	// "leaving directory"-messages we might have missed a
	// directory change.
	if (mch_getperm(ptr) < 0)
	{
	    vim_free(ptr);
	    directory = qf_guess_filepath(qfl, fname);
	    if (directory)
		ptr = concat_fnames(directory, fname, TRUE);
	    else
		ptr = vim_strsave(fname);
	}
	// Use concatenated directory name and file name
	bufname = ptr;
    }
    else
	bufname = fname;

    if (qf_last_bufname != NULL && STRCMP(bufname, qf_last_bufname) == 0
	    && bufref_valid(&qf_last_bufref))
    {
	buf = qf_last_bufref.br_buf;
	vim_free(ptr);
    }
    else
    {
	vim_free(qf_last_bufname);
	buf = buflist_new(bufname, NULL, (linenr_T)0, BLN_NOOPT);
	if (bufname == ptr)
	    qf_last_bufname = bufname;
	else
	    qf_last_bufname = vim_strsave(bufname);
	set_bufref(&qf_last_bufref, buf);
    }
    if (buf == NULL)
	return 0;

    buf->b_has_qf_entry =
			IS_QF_LIST(qfl) ? BUF_HAS_QF_ENTRY : BUF_HAS_LL_ENTRY;
    return buf->b_fnum;
}


qf_getprop_keys2flags(dict_T *what, int loclist)
{
    int		flags = QF_GETLIST_NONE;

    if (dict_has_key(what, "all"))
    {
	flags |= QF_GETLIST_ALL;
	if (!loclist)
	    // File window ID is applicable only to location list windows
	    flags &= ~ QF_GETLIST_FILEWINID;
    }

    if (dict_has_key(what, "title"))
	flags |= QF_GETLIST_TITLE;

    if (dict_has_key(what, "nr"))
	flags |= QF_GETLIST_NR;

    if (dict_has_key(what, "winid"))
	flags |= QF_GETLIST_WINID;

    if (dict_has_key(what, "context"))
	flags |= QF_GETLIST_CONTEXT;

    if (dict_has_key(what, "id"))
	flags |= QF_GETLIST_ID;

    if (dict_has_key(what, "items"))
	flags |= QF_GETLIST_ITEMS;

    if (dict_has_key(what, "idx"))
	flags |= QF_GETLIST_IDX;

    if (dict_has_key(what, "size"))
	flags |= QF_GETLIST_SIZE;

    if (dict_has_key(what, "changedtick"))
	flags |= QF_GETLIST_TICK;

    if (loclist && dict_has_key(what, "filewinid"))
	flags |= QF_GETLIST_FILEWINID;

    if (dict_has_key(what, "qfbufnr"))
	flags |= QF_GETLIST_QFBUFNR;

    if (dict_has_key(what, "quickfixtextfunc"))
	flags |= QF_GETLIST_QFTF;

    return flags;
}


qf_cleanup_state(qfstate_T *pstate)
{
    if (pstate->fd != NULL)
	fclose(pstate->fd);

    vim_free(pstate->growbuf);
    if (pstate->vc.vc_type != CONV_NONE)
	convert_setup(&pstate->vc, NULL, NULL);
}


wipe_qf_buffer(qf_info_T *qi)
{
    buf_T	*qfbuf;

    if (qi->qf_bufnr != INVALID_QFBUFNR)
    {
	qfbuf = buflist_findnr(qi->qf_bufnr);
	if (qfbuf != NULL && qfbuf->b_nwindows == 0)
	{
	    // If the quickfix buffer is not loaded in any window, then
	    // wipe the buffer.
	    close_buffer(NULL, qfbuf, DOBUF_WIPE, FALSE, FALSE);
	    qi->qf_bufnr = INVALID_QFBUFNR;
	}
    }
}


vgr_load_dummy_buf(
	char_u *fname,
	char_u *dirname_start,
	char_u *dirname_now)
{
    int		save_mls;
#if defined(FEAT_SYN_HL)
    char_u	*save_ei = NULL;
#endif
    buf_T	*buf;

#if defined(FEAT_SYN_HL)
    // Don't do Filetype autocommands to avoid loading syntax and
    // indent scripts, a great speed improvement.
    save_ei = au_event_disable(",Filetype");
#endif
    // Don't use modelines here, it's useless.
    save_mls = p_mls;
    p_mls = 0;

    // Load file into a buffer, so that 'fileencoding' is detected,
    // autocommands applied, etc.
    buf = load_dummy_buffer(fname, dirname_start, dirname_now);

    p_mls = save_mls;
#if defined(FEAT_SYN_HL)
    au_event_restore(save_ei);
#endif

    return buf;
}


qf_getprop_idx(qf_list_T *qfl, int eidx, dict_T *retdict)
{
    if (eidx == 0)
    {
	eidx = qfl->qf_index;
	if (qf_list_empty(qfl))
	    // For empty lists, current index is set to 0
	    eidx = 0;
    }
    return dict_add_number(retdict, "idx", eidx);
}


qf_get_properties(win_T *wp, dict_T *what, dict_T *retdict)
{
    qf_info_T	*qi = &ql_info;
    qf_list_T	*qfl;
    int		status = OK;
    int		qf_idx = INVALID_QFIDX;
    int		eidx = 0;
    dictitem_T	*di;
    int		flags = QF_GETLIST_NONE;

    if ((di = dict_find(what, (char_u *)"lines", -1)) != NULL)
	return qf_get_list_from_lines(what, di, retdict);

    if (wp != NULL)
	qi = GET_LOC_LIST(wp);

    flags = qf_getprop_keys2flags(what, (wp != NULL));

    if (!qf_stack_empty(qi))
	qf_idx = qf_getprop_qfidx(qi, what);

    // List is not present or is empty
    if (qf_stack_empty(qi) || qf_idx == INVALID_QFIDX)
	return qf_getprop_defaults(qi, flags, wp != NULL, retdict);

    qfl = qf_get_list(qi, qf_idx);

    // If an entry index is specified, use that
    if ((di = dict_find(what, (char_u *)"idx", -1)) != NULL)
    {
	if (di->di_tv.v_type != VAR_NUMBER)
	    return FAIL;
	eidx = di->di_tv.vval.v_number;
    }

    if (flags & QF_GETLIST_TITLE)
	status = qf_getprop_title(qfl, retdict);
    if ((status == OK) && (flags & QF_GETLIST_NR))
	status = dict_add_number(retdict, "nr", qf_idx + 1);
    if ((status == OK) && (flags & QF_GETLIST_WINID))
	status = dict_add_number(retdict, "winid", qf_winid(qi));
    if ((status == OK) && (flags & QF_GETLIST_ITEMS))
	status = qf_getprop_items(qi, qf_idx, eidx, retdict);
    if ((status == OK) && (flags & QF_GETLIST_CONTEXT))
	status = qf_getprop_ctx(qfl, retdict);
    if ((status == OK) && (flags & QF_GETLIST_ID))
	status = dict_add_number(retdict, "id", qfl->qf_id);
    if ((status == OK) && (flags & QF_GETLIST_IDX))
	status = qf_getprop_idx(qfl, eidx, retdict);
    if ((status == OK) && (flags & QF_GETLIST_SIZE))
	status = dict_add_number(retdict, "size", qfl->qf_count);
    if ((status == OK) && (flags & QF_GETLIST_TICK))
	status = dict_add_number(retdict, "changedtick", qfl->qf_changedtick);
    if ((status == OK) && (wp != NULL) && (flags & QF_GETLIST_FILEWINID))
	status = qf_getprop_filewinid(wp, qi, retdict);
    if ((status == OK) && (flags & QF_GETLIST_QFBUFNR))
	status = qf_getprop_qfbufnr(qi, retdict);
    if ((status == OK) && (flags & QF_GETLIST_QFTF))
	status = qf_getprop_qftf(qfl, retdict);

    return status;
}


cexpr_core(exarg_T *eap, typval_T *tv)
{
    qf_info_T	*qi;
    win_T	*wp = NULL;

    qi = qf_cmd_get_or_alloc_stack(eap, &wp);
    if (qi == NULL)
	return FAIL;

    if ((tv->v_type == VAR_STRING && tv->vval.v_string != NULL)
	    || (tv->v_type == VAR_LIST && tv->vval.v_list != NULL))
    {
	int	res;
	int_u	save_qfid;
	char_u	*au_name = cexpr_get_auname(eap->cmdidx);

	incr_quickfix_busy();
	res = qf_init_ext(qi, qi->qf_curlist, NULL, NULL, tv, p_efm,
			(eap->cmdidx != CMD_caddexpr
			 && eap->cmdidx != CMD_laddexpr),
			     (linenr_T)0, (linenr_T)0,
			     qf_cmdtitle(*eap->cmdlinep), NULL);
	if (qf_stack_empty(qi))
	{
	    decr_quickfix_busy();
	    return FAIL;
	}
	if (res >= 0)
	    qf_list_changed(qf_get_curlist(qi));

	// Remember the current quickfix list identifier, so that we can
	// check for autocommands changing the current quickfix list.
	save_qfid = qf_get_curlist(qi)->qf_id;
	if (au_name != NULL)
	    apply_autocmds(EVENT_QUICKFIXCMDPOST, au_name,
					    curbuf->b_fname, TRUE, curbuf);

	// Jump to the first error for a new list and if autocmds didn't
	// free the list.
	if (res > 0 && (eap->cmdidx == CMD_cexpr || eap->cmdidx == CMD_lexpr)
		&& qflist_valid(wp, save_qfid))
	    // display the first error
	    qf_jump_first(qi, save_qfid, eap->forceit);
	decr_quickfix_busy();
	return OK;
    }

    emsg(_(e_string_or_list_expected));
    return FAIL;
}


qf_get_nth_above_entry(qfline_T *entry, int n, int linewise, int *errornr)
{
    while (n-- > 0 && !got_int)
    {
	if (entry->qf_prev == NULL
		|| entry->qf_prev->qf_fnum != entry->qf_fnum)
	    break;

	entry = entry->qf_prev;
	--*errornr;

	// If multiple entries are on the same line, then use the first entry
	if (linewise)
	    entry = qf_find_first_entry_on_line(entry, errornr);
    }
}


qf_get_cur_idx(exarg_T *eap)
{
    qf_info_T	*qi;

    if ((qi = qf_cmd_get_stack(eap, FALSE)) == NULL)
	return 0;

    return qf_get_curlist(qi)->qf_index;
}


qf_parse_fmt_m(regmatch_T *rmp, int midx, qffields_T *fields)
{
    char_u	*p;
    int		len;

    if (rmp->startp[midx] == NULL || rmp->endp[midx] == NULL)
	return QF_FAIL;
    len = (int)(rmp->endp[midx] - rmp->startp[midx]);
    if (len >= fields->errmsglen)
    {
	// len + null terminator
	if ((p = vim_realloc(fields->errmsg, len + 1)) == NULL)
	    return QF_NOMEM;
	fields->errmsg = p;
	fields->errmsglen = len + 1;
    }
    vim_strncpy(fields->errmsg, rmp->startp[midx], len);
    return QF_OK;
}


qf_set_properties(qf_info_T *qi, dict_T *what, int action, char_u *title)
{
    dictitem_T	*di;
    int		retval = FAIL;
    int		qf_idx;
    int		newlist = FALSE;
    qf_list_T	*qfl;

    if (action == ' ' || qf_stack_empty(qi))
	newlist = TRUE;

    qf_idx = qf_setprop_get_qfidx(qi, what, action, &newlist);
    if (qf_idx == INVALID_QFIDX)	// List not found
	return FAIL;

    if (newlist)
    {
	qi->qf_curlist = qf_idx;
	qf_new_list(qi, title);
	qf_idx = qi->qf_curlist;
    }

    qfl = qf_get_list(qi, qf_idx);
    if ((di = dict_find(what, (char_u *)"title", -1)) != NULL)
	retval = qf_setprop_title(qi, qf_idx, what, di);
    if ((di = dict_find(what, (char_u *)"items", -1)) != NULL)
	retval = qf_setprop_items(qi, qf_idx, di, action);
    if ((di = dict_find(what, (char_u *)"lines", -1)) != NULL)
	retval = qf_setprop_items_from_lines(qi, qf_idx, what, di, action);
    if ((di = dict_find(what, (char_u *)"context", -1)) != NULL)
	retval = qf_setprop_context(qfl, di);
    if ((di = dict_find(what, (char_u *)"idx", -1)) != NULL)
	retval = qf_setprop_curidx(qi, qfl, di);
    if ((di = dict_find(what, (char_u *)"quickfixtextfunc", -1)) != NULL)
	retval = qf_setprop_qftf(qi, qfl, di);

    if (newlist || retval == OK)
	qf_list_changed(qfl);
    if (newlist)
	qf_update_buffer(qi, NULL);

    return retval;
}


mark_quickfix_ctx(qf_info_T *qi, int copyID)
{
    int		i;
    int		abort = FALSE;
    typval_T	*ctx;
    callback_T	*cb;

    for (i = 0; i < LISTCOUNT && !abort; ++i)
    {
	ctx = qi->qf_lists[i].qf_ctx;
	if (ctx != NULL && ctx->v_type != VAR_NUMBER
		&& ctx->v_type != VAR_STRING && ctx->v_type != VAR_FLOAT)
	    abort = abort || set_ref_in_item(ctx, copyID, NULL, NULL);

	cb = &qi->qf_lists[i].qf_qftf_cb;
	abort = abort || set_ref_in_callback(cb, copyID);
    }

    return abort;
}


qf_buf_add_line(
	buf_T		*buf,		// quickfix window buffer
	linenr_T	lnum,
	qfline_T	*qfp,
	char_u		*dirname,
	int		first_bufline,
	char_u		*qftf_str)
{
    int		len;
    buf_T	*errbuf;

    // If the 'quickfixtextfunc' function returned a non-empty custom string
    // for this entry, then use it.
    if (qftf_str != NULL && *qftf_str != NUL)
	vim_strncpy(IObuff, qftf_str, IOSIZE - 1);
    else
    {
	if (qfp->qf_module != NULL)
	{
	    vim_strncpy(IObuff, qfp->qf_module, IOSIZE - 1);
	    len = (int)STRLEN(IObuff);
	}
	else if (qfp->qf_fnum != 0
		&& (errbuf = buflist_findnr(qfp->qf_fnum)) != NULL
		&& errbuf->b_fname != NULL)
	{
	    if (qfp->qf_type == 1)	// :helpgrep
		vim_strncpy(IObuff, gettail(errbuf->b_fname), IOSIZE - 1);
	    else
	    {
		// Shorten the file name if not done already.
		// For optimization, do this only for the first entry in a
		// buffer.
		if (first_bufline && (errbuf->b_sfname == NULL
				|| mch_isFullName(errbuf->b_sfname)))
		{
		    if (*dirname == NUL)
			mch_dirname(dirname, MAXPATHL);
		    shorten_buf_fname(errbuf, dirname, FALSE);
		}
		vim_strncpy(IObuff, errbuf->b_fname, IOSIZE - 1);
	    }
	    len = (int)STRLEN(IObuff);
	}
	else
	    len = 0;

	if (len < IOSIZE - 1)
	    IObuff[len++] = '|';

	if (qfp->qf_lnum > 0)
	{
	    qf_range_text(qfp, IObuff + len, IOSIZE - len);
	    len += (int)STRLEN(IObuff + len);

	    vim_snprintf((char *)IObuff + len, IOSIZE - len, "%s",
		    (char *)qf_types(qfp->qf_type, qfp->qf_nr));
	    len += (int)STRLEN(IObuff + len);
	}
	else if (qfp->qf_pattern != NULL)
	{
	    qf_fmt_text(qfp->qf_pattern, IObuff + len, IOSIZE - len);
	    len += (int)STRLEN(IObuff + len);
	}
	if (len < IOSIZE - 2)
	{
	    IObuff[len++] = '|';
	    IObuff[len++] = ' ';
	}

	// Remove newlines and leading whitespace from the text.
	// For an unrecognized line keep the indent, the compiler may
	// mark a word with ^^^^.
	qf_fmt_text(len > 3 ? skipwhite(qfp->qf_text) : qfp->qf_text,
		IObuff + len, IOSIZE - len);
    }

    if (ml_append_buf(buf, lnum, IObuff,
		(colnr_T)STRLEN(IObuff) + 1, FALSE) == FAIL)
	return FAIL;

    return OK;
}


qf_get_next_list_line(qfstate_T *state)
{
    listitem_T	*p_li = state->p_li;
    int		len;

    while (p_li != NULL
	    && (p_li->li_tv.v_type != VAR_STRING
		|| p_li->li_tv.vval.v_string == NULL))
	p_li = p_li->li_next;	// Skip non-string items

    if (p_li == NULL)		// End of the list
    {
	state->p_li = NULL;
	return QF_END_OF_INPUT;
    }

    len = (int)STRLEN(p_li->li_tv.vval.v_string);
    if (len > IOSIZE - 2)
    {
	state->linebuf = qf_grow_linebuf(state, len);
	if (state->linebuf == NULL)
	    return QF_NOMEM;
    }
    else
    {
	state->linebuf = IObuff;
	state->linelen = len;
    }

    vim_strncpy(state->linebuf, p_li->li_tv.vval.v_string, state->linelen);

    state->p_li = p_li->li_next;	// next item
    return QF_OK;
}


ex_vimgrep(exarg_T *eap)
{
    vgr_args_T	args;
    qf_info_T	*qi;
    qf_list_T	*qfl;
    int_u	save_qfid;
    win_T	*wp = NULL;
    int		redraw_for_dummy = FALSE;
    buf_T	*first_match_buf = NULL;
    char_u	*target_dir = NULL;
    char_u	*au_name =  NULL;
    int		status;

    au_name = vgr_get_auname(eap->cmdidx);
    if (au_name != NULL && apply_autocmds(EVENT_QUICKFIXCMDPRE, au_name,
					       curbuf->b_fname, TRUE, curbuf))
    {
#ifdef FEAT_EVAL
	if (aborting())
	    return;
#endif
    }

    qi = qf_cmd_get_or_alloc_stack(eap, &wp);
    if (qi == NULL)
	return;

    if (vgr_process_args(eap, &args) == FAIL)
	goto theend;

    if ((eap->cmdidx != CMD_grepadd && eap->cmdidx != CMD_lgrepadd
		&& eap->cmdidx != CMD_vimgrepadd
		&& eap->cmdidx != CMD_lvimgrepadd)
					|| qf_stack_empty(qi))
	// make place for a new list
	qf_new_list(qi, args.qf_title);

    incr_quickfix_busy();

    status = vgr_process_files(wp, qi, &args, &redraw_for_dummy,
						&first_match_buf, &target_dir);
    if (status != OK)
    {
	FreeWild(args.fcount, args.fnames);
	decr_quickfix_busy();
	goto theend;
    }

    FreeWild(args.fcount, args.fnames);

    qfl = qf_get_curlist(qi);
    qfl->qf_nonevalid = FALSE;
    qfl->qf_ptr = qfl->qf_start;
    qfl->qf_index = 1;
    qf_list_changed(qfl);

    qf_update_buffer(qi, NULL);

    // Remember the current quickfix list identifier, so that we can check for
    // autocommands changing the current quickfix list.
    save_qfid = qf_get_curlist(qi)->qf_id;

    if (au_name != NULL)
	apply_autocmds(EVENT_QUICKFIXCMDPOST, au_name,
					       curbuf->b_fname, TRUE, curbuf);
    // The QuickFixCmdPost autocmd may free the quickfix list. Check the list
    // is still valid.
    if (!qflist_valid(wp, save_qfid)
	    || qf_restore_list(qi, save_qfid) == FAIL)
    {
	decr_quickfix_busy();
	goto theend;
    }

    // Jump to first match.
    if (!qf_list_empty(qf_get_curlist(qi)))
    {
	if ((args.flags & VGR_NOJUMP) == 0)
	    vgr_jump_to_match(qi, eap->forceit, &redraw_for_dummy,
		    first_match_buf, target_dir);
    }
    else
	semsg(_(e_no_match_str_2), args.spat);

    decr_quickfix_busy();

    // If we loaded a dummy buffer into the current window, the autocommands
    // may have messed up things, need to redraw and recompute folds.
    if (redraw_for_dummy)
    {
#ifdef FEAT_FOLDING
	foldUpdateAll(curwin);
#else
	redraw_later(UPD_NOT_VALID);
#endif
    }

theend:
    vim_free(args.qf_title);
    vim_free(target_dir);
    vim_regfree(args.regmatch.regprog);
}


qf_entry_before_pos(qfline_T *qfp, pos_T *pos, int linewise)
{
    if (linewise)
	return qfp->qf_lnum < pos->lnum;
    else
	return (qfp->qf_lnum < pos->lnum ||
		(qfp->qf_lnum == pos->lnum && qfp->qf_col < pos->col));
}


qf_goto_tabwin_with_file(int fnum)
{
    tabpage_T	*tp;
    win_T	*wp;

    FOR_ALL_TAB_WINDOWS(tp, wp)
	if (wp->w_buffer->b_fnum == fnum)
	{
	    goto_tabpage_win(tp, wp);
	    return TRUE;
	}

    return FALSE;
}


qf_update_buffer(qf_info_T *qi, qfline_T *old_last)
{
    buf_T	*buf;
    win_T	*win;
    aco_save_T	aco;

    // Check if a buffer for the quickfix list exists.  Update it.
    buf = qf_find_buf(qi);
    if (buf != NULL)
    {
	linenr_T	old_line_count = buf->b_ml.ml_line_count;
	int		qf_winid = 0;

	if (IS_LL_STACK(qi))
	{
	    if (curwin->w_llist == qi)
		win = curwin;
	    else
	    {
		// Find the file window (non-quickfix) with this location list
		win = qf_find_win_with_loclist(qi);
		if (win == NULL)
		    // File window is not found. Find the location list window.
		    win = qf_find_win(qi);
		if (win == NULL)
		    return;
	    }
	    qf_winid = win->w_id;
	}

	if (old_last == NULL)
	    // set curwin/curbuf to buf and save a few things
	    aucmd_prepbuf(&aco, buf);

	qf_update_win_titlevar(qi);

	qf_fill_buffer(qf_get_curlist(qi), buf, old_last, qf_winid);
	++CHANGEDTICK(buf);

	if (old_last == NULL)
	{
	    (void)qf_win_pos_update(qi, 0);

	    // restore curwin/curbuf and a few other things
	    aucmd_restbuf(&aco);
	}

	// Only redraw when added lines are visible.  This avoids flickering
	// when the added lines are not visible.
	if ((win = qf_find_win(qi)) != NULL && old_line_count < win->w_botline)
	    redraw_buf_later(buf, UPD_NOT_VALID);
    }
}


qf_init(win_T	    *wp,
	char_u	    *efile,
	char_u	    *errorformat,
	int	    newlist,		// TRUE: start a new error list
	char_u	    *qf_title,
	char_u	    *enc)
{
    qf_info_T	    *qi = &ql_info;

    if (wp != NULL)
    {
	qi = ll_get_or_alloc_list(wp);
	if (qi == NULL)
	    return FAIL;
    }

    return qf_init_ext(qi, qi->qf_curlist, efile, curbuf, NULL, errorformat,
	    newlist, (linenr_T)0, (linenr_T)0, qf_title, enc);
}


qf_find_help_win(void)
{
    win_T *wp;

    FOR_ALL_WINDOWS(wp)
	if (bt_help(wp->w_buffer))
	    return wp;

    return NULL;
}


f_getqflist(typval_T *argvars UNUSED, typval_T *rettv UNUSED)
{
# ifdef FEAT_QUICKFIX
    if (in_vim9script() && check_for_opt_dict_arg(argvars, 0) == FAIL)
	return;

    get_qf_loc_list(TRUE, NULL, &argvars[0], rettv);
# endif
}


qf_push_dir(char_u *dirbuf, struct dir_stack_T **stackptr, int is_file_stack)
{
    struct dir_stack_T  *ds_new;
    struct dir_stack_T  *ds_ptr;

    // allocate new stack element and hook it in
    ds_new = ALLOC_ONE_ID(struct dir_stack_T, aid_qf_dirstack);
    if (ds_new == NULL)
	return NULL;

    ds_new->next = *stackptr;
    *stackptr = ds_new;

    // store directory on the stack
    if (vim_isAbsName(dirbuf)
	    || (*stackptr)->next == NULL
	    || is_file_stack)
	(*stackptr)->dirname = vim_strsave(dirbuf);
    else
    {
	// Okay we don't have an absolute path.
	// dirbuf must be a subdir of one of the directories on the stack.
	// Let's search...
	ds_new = (*stackptr)->next;
	(*stackptr)->dirname = NULL;
	while (ds_new)
	{
	    vim_free((*stackptr)->dirname);
	    (*stackptr)->dirname = concat_fnames(ds_new->dirname, dirbuf,
		    TRUE);
	    if (mch_isdir((*stackptr)->dirname) == TRUE)
		break;

	    ds_new = ds_new->next;
	}

	// clean up all dirs we already left
	while ((*stackptr)->next != ds_new)
	{
	    ds_ptr = (*stackptr)->next;
	    (*stackptr)->next = (*stackptr)->next->next;
	    vim_free(ds_ptr->dirname);
	    vim_free(ds_ptr);
	}

	// Nothing found -> it must be on top level
	if (ds_new == NULL)
	{
	    vim_free((*stackptr)->dirname);
	    (*stackptr)->dirname = vim_strsave(dirbuf);
	}
    }

    if ((*stackptr)->dirname != NULL)
	return (*stackptr)->dirname;
    else
    {
	ds_ptr = *stackptr;
	*stackptr = (*stackptr)->next;
	vim_free(ds_ptr);
	return NULL;
    }
}


qf_getprop_filewinid(win_T *wp, qf_info_T *qi, dict_T *retdict)
{
    int winid = 0;

    if (wp != NULL && IS_LL_WINDOW(wp))
    {
	win_T	*ll_wp = qf_find_win_with_loclist(qi);
	if (ll_wp != NULL)
	    winid = ll_wp->w_id;
    }

    return dict_add_number(retdict, "filewinid", winid);
}


ex_cbelow(exarg_T *eap)
{
    qf_info_T	*qi;
    qf_list_T	*qfl;
    int		dir;
    int		buf_has_flag;
    int		errornr = 0;
    pos_T	pos;

    if (eap->addr_count > 0 && eap->line2 <= 0)
    {
	emsg(_(e_invalid_range));
	return;
    }

    // Check whether the current buffer has any quickfix entries
    if (eap->cmdidx == CMD_cabove || eap->cmdidx == CMD_cbelow
	    || eap->cmdidx == CMD_cbefore || eap->cmdidx == CMD_cafter)
	buf_has_flag = BUF_HAS_QF_ENTRY;
    else
	buf_has_flag = BUF_HAS_LL_ENTRY;
    if (!(curbuf->b_has_qf_entry & buf_has_flag))
    {
	emsg(_(e_no_errors));
	return;
    }

    if ((qi = qf_cmd_get_stack(eap, TRUE)) == NULL)
	return;

    qfl = qf_get_curlist(qi);
    // check if the list has valid errors
    if (!qf_list_has_valid_entries(qfl))
    {
	emsg(_(e_no_errors));
	return;
    }

    if (eap->cmdidx == CMD_cbelow
	    || eap->cmdidx == CMD_lbelow
	    || eap->cmdidx == CMD_cafter
	    || eap->cmdidx == CMD_lafter)
	// Forward motion commands
	dir = FORWARD;
    else
	dir = BACKWARD;

    pos = curwin->w_cursor;
    // A quickfix entry column number is 1 based whereas cursor column
    // number is 0 based. Adjust the column number.
    pos.col++;
    errornr = qf_find_nth_adj_entry(qfl, curbuf->b_fnum, &pos,
				eap->addr_count > 0 ? eap->line2 : 0, dir,
				eap->cmdidx == CMD_cbelow
					|| eap->cmdidx == CMD_lbelow
					|| eap->cmdidx == CMD_cabove
					|| eap->cmdidx == CMD_labove);

    if (errornr > 0)
	qf_jump(qi, 0, errornr, FALSE);
    else
	emsg(_(e_no_more_items));
}


qf_find_win_with_normal_buf(void)
{
    win_T	*wp;

    FOR_ALL_WINDOWS(wp)
	if (bt_normal(wp->w_buffer))
	    return wp;

    return NULL;
}


qf_find_nth_adj_entry(
	qf_list_T	*qfl,
	int		bnr,
	pos_T		*pos,
	int		n,
	int		dir,
	int		linewise)
{
    qfline_T	*adj_entry;
    int		errornr;

    // Find an entry closest to the specified position
    adj_entry = qf_find_closest_entry(qfl, bnr, pos, dir, linewise, &errornr);
    if (adj_entry == NULL)
	return 0;

    if (--n > 0)
    {
	// Go to the n'th entry in the current buffer
	if (dir == FORWARD)
	    qf_get_nth_below_entry(adj_entry, n, linewise, &errornr);
	else
	    qf_get_nth_above_entry(adj_entry, n, linewise, &errornr);
    }

    return errornr;
}


qf_get_entry(
	qf_list_T	*qfl,
	int		errornr,
	int		dir,
	int		*new_qfidx)
{
    qfline_T	*qf_ptr = qfl->qf_ptr;
    int		qfidx = qfl->qf_index;

    if (dir != 0)    // next/prev valid entry
	qf_ptr = get_nth_valid_entry(qfl, errornr, dir, &qfidx);
    else if (errornr != 0)	// go to specified number
	qf_ptr = get_nth_entry(qfl, errornr, &qfidx);

    *new_qfidx = qfidx;
    return qf_ptr;
}


qf_find_win_with_loclist(qf_info_T *ll)
{
    win_T	*wp;

    FOR_ALL_WINDOWS(wp)
	if (wp->w_llist == ll && !bt_quickfix(wp->w_buffer))
	    return wp;

    return NULL;
}


qf_new_list(qf_info_T *qi, char_u *qf_title)
{
    int		i;
    qf_list_T	*qfl;

    // If the current entry is not the last entry, delete entries beyond
    // the current entry.  This makes it possible to browse in a tree-like
    // way with ":grep".
    while (qi->qf_listcount > qi->qf_curlist + 1)
	qf_free(&qi->qf_lists[--qi->qf_listcount]);

    // When the stack is full, remove to oldest entry
    // Otherwise, add a new entry.
    if (qi->qf_listcount == LISTCOUNT)
    {
	qf_free(&qi->qf_lists[0]);
	for (i = 1; i < LISTCOUNT; ++i)
	    qi->qf_lists[i - 1] = qi->qf_lists[i];
	qi->qf_curlist = LISTCOUNT - 1;
    }
    else
	qi->qf_curlist = qi->qf_listcount++;
    qfl = qf_get_curlist(qi);
    CLEAR_POINTER(qfl);
    qf_store_title(qfl, qf_title);
    qfl->qfl_type = qi->qfl_type;
    qfl->qf_id = ++last_qf_id;
}


qf_getprop_defaults(qf_info_T *qi, int flags, int locstack, dict_T *retdict)
{
    int		status = OK;

    if (flags & QF_GETLIST_TITLE)
	status = dict_add_string(retdict, "title", (char_u *)"");
    if ((status == OK) && (flags & QF_GETLIST_ITEMS))
    {
	list_T	*l = list_alloc();
	if (l != NULL)
	    status = dict_add_list(retdict, "items", l);
	else
	    status = FAIL;
    }
    if ((status == OK) && (flags & QF_GETLIST_NR))
	status = dict_add_number(retdict, "nr", 0);
    if ((status == OK) && (flags & QF_GETLIST_WINID))
	status = dict_add_number(retdict, "winid", qf_winid(qi));
    if ((status == OK) && (flags & QF_GETLIST_CONTEXT))
	status = dict_add_string(retdict, "context", (char_u *)"");
    if ((status == OK) && (flags & QF_GETLIST_ID))
	status = dict_add_number(retdict, "id", 0);
    if ((status == OK) && (flags & QF_GETLIST_IDX))
	status = dict_add_number(retdict, "idx", 0);
    if ((status == OK) && (flags & QF_GETLIST_SIZE))
	status = dict_add_number(retdict, "size", 0);
    if ((status == OK) && (flags & QF_GETLIST_TICK))
	status = dict_add_number(retdict, "changedtick", 0);
    if ((status == OK) && locstack && (flags & QF_GETLIST_FILEWINID))
	status = dict_add_number(retdict, "filewinid", 0);
    if ((status == OK) && (flags & QF_GETLIST_QFBUFNR))
	status = qf_getprop_qfbufnr(qi, retdict);
    if ((status == OK) && (flags & QF_GETLIST_QFTF))
	status = dict_add_string(retdict, "quickfixtextfunc", (char_u *)"");

    return status;
}


free_efm_list(efm_T **efm_first)
{
    efm_T *efm_ptr;

    for (efm_ptr = *efm_first; efm_ptr != NULL; efm_ptr = *efm_first)
    {
	*efm_first = efm_ptr->next;
	vim_regfree(efm_ptr->prog);
	vim_free(efm_ptr);
    }
    fmt_start = NULL;
}


qf_alloc_stack(qfltype_T qfltype)
{
    qf_info_T *qi;

    qi = ALLOC_CLEAR_ONE_ID(qf_info_T, aid_qf_qfinfo);
    if (qi != NULL)
    {
	qi->qf_refcount++;
	qi->qfl_type = qfltype;
	qi->qf_bufnr = INVALID_QFBUFNR;
    }
    return qi;
}


qf_free(qf_list_T *qfl)
{
    qf_free_items(qfl);

    VIM_CLEAR(qfl->qf_title);
    free_tv(qfl->qf_ctx);
    qfl->qf_ctx = NULL;
    free_callback(&qfl->qf_qftf_cb);
    qfl->qf_id = 0;
    qfl->qf_changedtick = 0L;
}


get_errorlist(
	qf_info_T	*qi_arg,
	win_T		*wp,
	int		qf_idx,
	int		eidx,
	list_T		*list)
{
    qf_info_T	*qi = qi_arg;
    qf_list_T	*qfl;
    qfline_T	*qfp;
    int		i;

    if (qi == NULL)
    {
	qi = &ql_info;
	if (wp != NULL)
	{
	    qi = GET_LOC_LIST(wp);
	    if (qi == NULL)
		return FAIL;
	}
    }

    if (eidx < 0)
	return OK;

    if (qf_idx == INVALID_QFIDX)
	qf_idx = qi->qf_curlist;

    if (qf_idx >= qi->qf_listcount)
	return FAIL;

    qfl = qf_get_list(qi, qf_idx);
    if (qf_list_empty(qfl))
	return FAIL;

    FOR_ALL_QFL_ITEMS(qfl, qfp, i)
    {
	if (eidx > 0)
	{
	    if (eidx == i)
		return get_qfline_items(qfp, list);
	}
	else if (get_qfline_items(qfp, list) == FAIL)
	    return FAIL;
    }

    return OK;
}


qf_goto_cwindow(qf_info_T *qi, int resize, int sz, int vertsplit)
{
    win_T	*win;

    win = qf_find_win(qi);
    if (win == NULL)
	return FAIL;

    win_goto(win);
    if (resize)
    {
	if (vertsplit)
	{
	    if (sz != win->w_width)
		win_setwidth(sz);
	}
	else if (sz != win->w_height && win->w_height
		       + win->w_status_height + tabline_height() < cmdline_row)
	    win_setheight(sz);
    }

    return OK;
}


qf_stack_empty(qf_info_T *qi)
{
    return qi == NULL || qi->qf_listcount <= 0;
}


copy_loclist_stack(win_T *from, win_T *to)
{
    qf_info_T	*qi;
    int		idx;

    // When copying from a location list window, copy the referenced
    // location list. For other windows, copy the location list for
    // that window.
    if (IS_LL_WINDOW(from))
	qi = from->w_llist_ref;
    else
	qi = from->w_llist;

    if (qi == NULL)		    // no location list to copy
	return;

    // allocate a new location list
    if ((to->w_llist = qf_alloc_stack(QFLT_LOCATION)) == NULL)
	return;

    to->w_llist->qf_listcount = qi->qf_listcount;

    // Copy the location lists one at a time
    for (idx = 0; idx < qi->qf_listcount; ++idx)
    {
	to->w_llist->qf_curlist = idx;

	if (copy_loclist(qf_get_list(qi, idx),
			qf_get_list(to->w_llist, idx)) == FAIL)
	{
	    qf_free_all(to);
	    return;
	}
    }

    to->w_llist->qf_curlist = qi->qf_curlist;	// current list
}


ex_copen(exarg_T *eap)
{
    qf_info_T	*qi;
    qf_list_T	*qfl;
    int		height;
    int		status = FAIL;
    int		lnum;

    if ((qi = qf_cmd_get_stack(eap, TRUE)) == NULL)
	return;

    incr_quickfix_busy();

    if (eap->addr_count != 0)
	height = eap->line2;
    else
	height = QF_WINHEIGHT;

    reset_VIsual_and_resel();			// stop Visual mode
#ifdef FEAT_GUI
    need_mouse_correct = TRUE;
#endif

    // Find an existing quickfix window, or open a new one.
    if (cmdmod.cmod_tab == 0)
	status = qf_goto_cwindow(qi, eap->addr_count != 0, height,
						cmdmod.cmod_split & WSP_VERT);
    if (status == FAIL)
	if (qf_open_new_cwindow(qi, height) == FAIL)
	{
	    decr_quickfix_busy();
	    return;
	}

    qfl = qf_get_curlist(qi);
    qf_set_title_var(qfl);
    // Save the current index here, as updating the quickfix buffer may free
    // the quickfix list
    lnum = qfl->qf_index;

    // Fill the buffer with the quickfix list.
    qf_fill_buffer(qfl, curbuf, NULL, curwin->w_id);

    decr_quickfix_busy();

    curwin->w_cursor.lnum = lnum;
    curwin->w_cursor.col = 0;
    check_cursor();
    update_topline();		// scroll to show the line
}


qf_parse_match(
	char_u		*linebuf,
	int		linelen,
	efm_T		*fmt_ptr,
	regmatch_T	*regmatch,
	qffields_T	*fields,
	int		qf_multiline,
	int		qf_multiscan,
	char_u		**tail)
{
    int		idx = fmt_ptr->prefix;
    int		i;
    int		midx;
    int		status;

    if ((idx == 'C' || idx == 'Z') && !qf_multiline)
	return QF_FAIL;
    if (vim_strchr((char_u *)"EWIN", idx) != NULL)
	fields->type = idx;
    else
	fields->type = 0;

    // Extract error message data from matched line.
    // We check for an actual submatch, because "\[" and "\]" in
    // the 'errorformat' may cause the wrong submatch to be used.
    for (i = 0; i < FMT_PATTERNS; i++)
    {
	status = QF_OK;
	midx = (int)fmt_ptr->addr[i];
	if (i == 0 && midx > 0)				// %f
	    status = qf_parse_fmt_f(regmatch, midx, fields, idx);
	else if (i == FMT_PATTERN_M)
	{
	    if (fmt_ptr->flags == '+' && !qf_multiscan)	// %+
		status = copy_nonerror_line(linebuf, linelen, fields);
	    else if (midx > 0)				// %m
		status = qf_parse_fmt_m(regmatch, midx, fields);
	}
	else if (i == FMT_PATTERN_R && midx > 0)	// %r
	    status = qf_parse_fmt_r(regmatch, midx, tail);
	else if (midx > 0)				// others
	    status = (qf_parse_fmt[i])(regmatch, midx, fields);

	if (status != QF_OK)
	    return status;
    }

    return QF_OK;
}


qf_goto_win_with_ll_file(win_T *use_win, int qf_fnum, qf_info_T *ll_ref)
{
    win_T	*win = use_win;

    if (win == NULL)
    {
	// Find the window showing the selected file in the current tab page.
	FOR_ALL_WINDOWS(win)
	    if (win->w_buffer->b_fnum == qf_fnum)
		break;
	if (win == NULL)
	{
	    // Find a previous usable window
	    win = curwin;
	    do
	    {
		if (bt_normal(win->w_buffer))
		    break;
		if (win->w_prev == NULL)
		    win = lastwin;	// wrap around the top
		else
		    win = win->w_prev; // go to previous window
	    } while (win != curwin);
	}
    }
    win_goto(win);

    // If the location list for the window is not set, then set it
    // to the location list from the location window
    if (win->w_llist == NULL && ll_ref != NULL)
	win_set_loclist(win, ll_ref);
}


qf_getprop_title(qf_list_T *qfl, dict_T *retdict)
{
    return dict_add_string(retdict, "title", qfl->qf_title);
}


get_prev_valid_entry(
	qf_list_T	*qfl,
	qfline_T	*qf_ptr,
	int		*qf_index,
	int		dir)
{
    int			idx;
    int			old_qf_fnum;

    idx = *qf_index;
    old_qf_fnum = qf_ptr->qf_fnum;

    do
    {
	if (idx == 1 || qf_ptr->qf_prev == NULL)
	    return NULL;
	--idx;
	qf_ptr = qf_ptr->qf_prev;
    } while ((!qfl->qf_nonevalid && !qf_ptr->qf_valid)
	    || (dir == BACKWARD_FILE && qf_ptr->qf_fnum == old_qf_fnum));

    *qf_index = idx;
    return qf_ptr;
}


vgr_get_auname(cmdidx_T cmdidx)
{
    switch (cmdidx)
    {
	case CMD_vimgrep:     return (char_u *)"vimgrep";
	case CMD_lvimgrep:    return (char_u *)"lvimgrep";
	case CMD_vimgrepadd:  return (char_u *)"vimgrepadd";
	case CMD_lvimgrepadd: return (char_u *)"lvimgrepadd";
	case CMD_grep:	      return (char_u *)"grep";
	case CMD_lgrep:	      return (char_u *)"lgrep";
	case CMD_grepadd:     return (char_u *)"grepadd";
	case CMD_lgrepadd:    return (char_u *)"lgrepadd";
	default: return NULL;
    }
}


qf_fmt_text(char_u *text, char_u *buf, int bufsize)
{
    int		i;
    char_u	*p = text;

    for (i = 0; *p != NUL && i < bufsize - 1; ++i)
    {
	if (*p == '\n')
	{
	    buf[i] = ' ';
	    while (*++p != NUL)
		if (!VIM_ISWHITE(*p) && *p != '\n')
		    break;
	}
	else
	    buf[i] = *p++;
    }
    buf[i] = NUL;
}


win_set_loclist(win_T *wp, qf_info_T *qi)
{
    wp->w_llist = qi;
    qi->qf_refcount++;
}


vgr_display_fname(char_u *fname)
{
    char_u	*p;

    msg_start();
    p = msg_strtrunc(fname, TRUE);
    if (p == NULL)
	msg_outtrans(fname);
    else
    {
	msg_outtrans(p);
	vim_free(p);
    }
    msg_clr_eos();
    msg_didout = FALSE;	    // overwrite this message
    msg_nowait = TRUE;	    // don't wait for this message
    msg_col = 0;
    out_flush();
}


cbuffer_get_auname(cmdidx_T cmdidx)
{
    switch (cmdidx)
    {
	case CMD_cbuffer:	return (char_u *)"cbuffer";
	case CMD_cgetbuffer:	return (char_u *)"cgetbuffer";
	case CMD_caddbuffer:	return (char_u *)"caddbuffer";
	case CMD_lbuffer:	return (char_u *)"lbuffer";
	case CMD_lgetbuffer:	return (char_u *)"lgetbuffer";
	case CMD_laddbuffer:	return (char_u *)"laddbuffer";
	default:		return NULL;
    }
}


qf_list_empty(qf_list_T *qfl)
{
    return qfl == NULL || qfl->qf_count <= 0;
}


f_setloclist(typval_T *argvars, typval_T *rettv)
{
    win_T	*win;

    rettv->vval.v_number = -1;

    if (in_vim9script()
	    && (check_for_number_arg(argvars, 0) == FAIL
		|| check_for_list_arg(argvars, 1) == FAIL
		|| check_for_opt_string_arg(argvars, 2) == FAIL
		|| (argvars[2].v_type != VAR_UNKNOWN
		    && check_for_opt_dict_arg(argvars, 3) == FAIL)))
	return;

    win = find_win_by_nr_or_id(&argvars[0]);
    if (win != NULL)
	set_qf_ll_list(win, &argvars[1], &argvars[2], &argvars[3], rettv);
}


qf_get_curlist(qf_info_T *qi)
{
    return qf_get_list(qi, qi->qf_curlist);
}


qf_jump_print_msg(
	qf_info_T	*qi,
	int		qf_index,
	qfline_T	*qf_ptr,
	buf_T		*old_curbuf,
	linenr_T	old_lnum)
{
    linenr_T		i;
    int			len;

    // Update the screen before showing the message, unless the screen
    // scrolled up.
    if (!msg_scrolled)
	update_topline_redraw();
    sprintf((char *)IObuff, _("(%d of %d)%s%s: "), qf_index,
	    qf_get_curlist(qi)->qf_count,
	    qf_ptr->qf_cleared ? _(" (line deleted)") : "",
	    (char *)qf_types(qf_ptr->qf_type, qf_ptr->qf_nr));
    // Add the message, skipping leading whitespace and newlines.
    len = (int)STRLEN(IObuff);
    qf_fmt_text(skipwhite(qf_ptr->qf_text), IObuff + len, IOSIZE - len);

    // Output the message.  Overwrite to avoid scrolling when the 'O'
    // flag is present in 'shortmess'; But when not jumping, print the
    // whole message.
    i = msg_scroll;
    if (curbuf == old_curbuf && curwin->w_cursor.lnum == old_lnum)
	msg_scroll = TRUE;
    else if (!msg_scrolled && shortmess(SHM_OVERALL))
	msg_scroll = FALSE;
    msg_attr_keep((char *)IObuff, 0, TRUE);
    msg_scroll = i;
}


qf_add_entries(
	qf_info_T	*qi,
	int		qf_idx,
	list_T		*list,
	char_u		*title,
	int		action)
{
    qf_list_T	*qfl = qf_get_list(qi, qf_idx);
    listitem_T	*li;
    dict_T	*d;
    qfline_T	*old_last = NULL;
    int		retval = OK;
    int		valid_entry = FALSE;

    if (action == ' ' || qf_idx == qi->qf_listcount)
    {
	// make place for a new list
	qf_new_list(qi, title);
	qf_idx = qi->qf_curlist;
	qfl = qf_get_list(qi, qf_idx);
    }
    else if (action == 'a' && !qf_list_empty(qfl))
	// Adding to existing list, use last entry.
	old_last = qfl->qf_last;
    else if (action == 'r')
    {
	qf_free_items(qfl);
	qf_store_title(qfl, title);
    }

    FOR_ALL_LIST_ITEMS(list, li)
    {
	if (li->li_tv.v_type != VAR_DICT)
	    continue; // Skip non-dict items

	d = li->li_tv.vval.v_dict;
	if (d == NULL)
	    continue;

	retval = qf_add_entry_from_dict(qfl, d, li == list->lv_first,
								&valid_entry);
	if (retval == QF_FAIL)
	    break;
    }

    // Check if any valid error entries are added to the list.
    if (valid_entry)
	qfl->qf_nonevalid = FALSE;
    else if (qfl->qf_index == 0)
	// no valid entry
	qfl->qf_nonevalid = TRUE;

    // If not appending to the list, set the current error to the first entry
    if (action != 'a')
	qfl->qf_ptr = qfl->qf_start;

    // Update the current error index if not appending to the list or if the
    // list was empty before and it is not empty now.
    if ((action != 'a' || qfl->qf_index == 0) && !qf_list_empty(qfl))
	qfl->qf_index = 1;

    // Don't update the cursor in quickfix window when appending entries
    qf_update_buffer(qi, old_last);

    return retval;
}


qf_find_entry_before_pos(
	int		bnr,
	pos_T		*pos,
	int		linewise,
	qfline_T	*qfp,
	int		*errornr)
{
    // Find the entry just before the position 'pos'
    while (qfp->qf_next != NULL
	    && qfp->qf_next->qf_fnum == bnr
	    && qf_entry_before_pos(qfp->qf_next, pos, linewise))
    {
	qfp = qfp->qf_next;
	++*errornr;
    }

    if (qf_entry_on_or_after_pos(qfp, pos, linewise))
	return NULL;

    if (linewise)
	// If multiple entries are on the same line, then use the first entry
	qfp = qf_find_first_entry_on_line(qfp, errornr);

    return qfp;
}


qf_entry_on_or_after_pos(qfline_T *qfp, pos_T *pos, int linewise)
{
    if (linewise)
	return qfp->qf_lnum >= pos->lnum;
    else
	return (qfp->qf_lnum > pos->lnum ||
		(qfp->qf_lnum == pos->lnum && qfp->qf_col >= pos->col));
}


restore_start_dir(char_u *dirname_start)
{
    char_u *dirname_now = alloc(MAXPATHL);

    if (NULL != dirname_now)
    {
	mch_dirname(dirname_now, MAXPATHL);
	if (STRCMP(dirname_start, dirname_now) != 0)
	{
	    // If the directory has changed, change it back by building up an
	    // appropriate ex command and executing it.
	    exarg_T ea;

	    CLEAR_FIELD(ea);
	    ea.arg = dirname_start;
	    ea.cmdidx = (curwin->w_localdir == NULL) ? CMD_cd : CMD_lcd;
	    ex_cd(&ea);
	}
	vim_free(dirname_now);
    }
}


qf_add_entry_from_dict(
	qf_list_T	*qfl,
	dict_T		*d,
	int		first_entry,
	int		*valid_entry)
{
    static int	did_bufnr_emsg;
    char_u	*filename, *module, *pattern, *text, *type;
    int		bufnum, valid, status, col, end_col, vcol, nr;
    long	lnum, end_lnum;

    if (first_entry)
	did_bufnr_emsg = FALSE;

    filename = dict_get_string(d, "filename", TRUE);
    module = dict_get_string(d, "module", TRUE);
    bufnum = (int)dict_get_number(d, "bufnr");
    lnum = (int)dict_get_number(d, "lnum");
    end_lnum = (int)dict_get_number(d, "end_lnum");
    col = (int)dict_get_number(d, "col");
    end_col = (int)dict_get_number(d, "end_col");
    vcol = (int)dict_get_number(d, "vcol");
    nr = (int)dict_get_number(d, "nr");
    type = dict_get_string(d, "type", TRUE);
    pattern = dict_get_string(d, "pattern", TRUE);
    text = dict_get_string(d, "text", TRUE);
    if (text == NULL)
	text = vim_strsave((char_u *)"");

    valid = TRUE;
    if ((filename == NULL && bufnum == 0) || (lnum == 0 && pattern == NULL))
	valid = FALSE;

    // Mark entries with non-existing buffer number as not valid. Give the
    // error message only once.
    if (bufnum != 0 && (buflist_findnr(bufnum) == NULL))
    {
	if (!did_bufnr_emsg)
	{
	    did_bufnr_emsg = TRUE;
	    semsg(_(e_buffer_nr_not_found), bufnum);
	}
	valid = FALSE;
	bufnum = 0;
    }

    // If the 'valid' field is present it overrules the detected value.
    if (dict_has_key(d, "valid"))
	valid = (int)dict_get_bool(d, "valid", FALSE);

    status =  qf_add_entry(qfl,
			NULL,		// dir
			filename,
			module,
			bufnum,
			text,
			lnum,
			end_lnum,
			col,
			end_col,
			vcol,		// vis_col
			pattern,	// search pattern
			nr,
			type == NULL ? NUL : *type,
			valid);

    vim_free(filename);
    vim_free(module);
    vim_free(pattern);
    vim_free(text);
    vim_free(type);

    if (valid)
	*valid_entry = TRUE;

    return status;
}


qf_get_valid_size(exarg_T *eap)
{
    qf_info_T	*qi;
    qf_list_T	*qfl;
    qfline_T	*qfp;
    int		i, sz = 0;
    int		prev_fnum = 0;

    if ((qi = qf_cmd_get_stack(eap, FALSE)) == NULL)
	return 0;

    qfl = qf_get_curlist(qi);
    FOR_ALL_QFL_ITEMS(qfl, qfp, i)
    {
	if (qfp->qf_valid)
	{
	    if (eap->cmdidx == CMD_cdo || eap->cmdidx == CMD_ldo)
		sz++;	// Count all valid entries
	    else if (qfp->qf_fnum > 0 && qfp->qf_fnum != prev_fnum)
	    {
		// Count the number of files
		sz++;
		prev_fnum = qfp->qf_fnum;
	    }
	}
    }

    return sz;
}


qf_alloc_fields(qffields_T *pfields)
{
    pfields->namebuf = alloc_id(CMDBUFFSIZE + 1, aid_qf_namebuf);
    pfields->module = alloc_id(CMDBUFFSIZE + 1, aid_qf_module);
    pfields->errmsglen = CMDBUFFSIZE + 1;
    pfields->errmsg = alloc_id(pfields->errmsglen, aid_qf_errmsg);
    pfields->pattern = alloc_id(CMDBUFFSIZE + 1, aid_qf_pattern);
    if (pfields->namebuf == NULL || pfields->errmsg == NULL
		|| pfields->pattern == NULL || pfields->module == NULL)
	return FAIL;

    return OK;
}


qf_view_result(int split)
{
    qf_info_T   *qi = &ql_info;

    if (IS_LL_WINDOW(curwin))
	qi = GET_LOC_LIST(curwin);

    if (qf_list_empty(qf_get_curlist(qi)))
    {
	emsg(_(e_no_errors));
	return;
    }

    if (split)
    {
	// Open the selected entry in a new window
	qf_jump_newwin(qi, 0, (long)curwin->w_cursor.lnum, FALSE, TRUE);
	do_cmdline_cmd((char_u *) "clearjumps");
	return;
    }

    do_cmdline_cmd((char_u *)(IS_LL_WINDOW(curwin) ? ".ll" : ".cc"));
}


vgr_qflist_valid(
	win_T	    *wp,
	qf_info_T   *qi,
	int_u	    qfid,
	char_u	    *title)
{
    // Verify that the quickfix/location list was not freed by an autocmd
    if (!qflist_valid(wp, qfid))
    {
	if (wp != NULL)
	{
	    // An autocmd has freed the location list.
	    emsg(_(e_current_location_list_was_changed));
	    return FALSE;
	}
	else
	{
	    // Quickfix list is not found, create a new one.
	    qf_new_list(qi, title);
	    return TRUE;
	}
    }

    if (qf_restore_list(qi, qfid) == FAIL)
	return FALSE;

    return TRUE;
}


vgr_process_args(
	exarg_T		*eap,
	vgr_args_T	*args)
{
    char_u	*p;

    vim_memset(args, 0, sizeof(*args));

    args->regmatch.regprog = NULL;
    args->qf_title = vim_strsave(qf_cmdtitle(*eap->cmdlinep));

    if (eap->addr_count > 0)
	args->tomatch = eap->line2;
    else
	args->tomatch = MAXLNUM;

    // Get the search pattern: either white-separated or enclosed in //
    p = skip_vimgrep_pat(eap->arg, &args->spat, &args->flags);
    if (p == NULL)
    {
	emsg(_(e_invalid_search_pattern_or_delimiter));
	return FAIL;
    }

    vgr_init_regmatch(&args->regmatch, args->spat);
    if (args->regmatch.regprog == NULL)
	return FAIL;

    p = skipwhite(p);
    if (*p == NUL)
    {
	emsg(_(e_file_name_missing_or_invalid_pattern));
	return FAIL;
    }

    // Parse the list of arguments, wildcards have already been expanded.
    if ((get_arglist_exp(p, &args->fcount, &args->fnames, TRUE) == FAIL) ||
	args->fcount == 0)
    {
	emsg(_(e_no_match));
	return FAIL;
    }

    return OK;
}


locstack_queue_delreq(qf_info_T *qi)
{
    qf_delq_T	*q;

    q = ALLOC_ONE(qf_delq_T);
    if (q != NULL)
    {
	q->qi = qi;
	q->next = qf_delq_head;
	qf_delq_head = q;
    }
}


qf_open_new_file_win(qf_info_T *ll_ref)
{
    int		flags;

    flags = WSP_ABOVE;
    if (ll_ref != NULL)
	flags |= WSP_NEWLOC;
    if (win_split(0, flags) == FAIL)
	return FAIL;		// not enough room for window
    p_swb = empty_option;	// don't split again
    swb_flags = 0;
    RESET_BINDING(curwin);
    if (ll_ref != NULL)
	// The new window should use the location list from the
	// location list window
	win_set_loclist(curwin, ll_ref);
    return OK;
}


qf_find_first_entry_on_line(qfline_T *entry, int *errornr)
{
    while (!got_int
	    && entry->qf_prev != NULL
	    && entry->qf_fnum == entry->qf_prev->qf_fnum
	    && entry->qf_lnum == entry->qf_prev->qf_lnum)
    {
	entry = entry->qf_prev;
	--*errornr;
    }

    return entry;
}


qf_list_changed(qf_list_T *qfl)
{
    qfl->qf_changedtick++;
}


unload_dummy_buffer(buf_T *buf, char_u *dirname_start)
{
    if (curbuf != buf)		// safety check
    {
	close_buffer(NULL, buf, DOBUF_UNLOAD, FALSE, TRUE);

	// When autocommands/'autochdir' option changed directory: go back.
	restore_start_dir(dirname_start);
    }
}


f_setqflist(typval_T *argvars, typval_T *rettv)
{
    if (in_vim9script()
	    && (check_for_list_arg(argvars, 0) == FAIL
		|| check_for_opt_string_arg(argvars, 1) == FAIL
		|| (argvars[1].v_type != VAR_UNKNOWN
		    && check_for_opt_dict_arg(argvars, 2) == FAIL)))
	return;

    set_qf_ll_list(NULL, &argvars[0], &argvars[1], &argvars[2], rettv);
}


qf_get_size(exarg_T *eap)
{
    qf_info_T	*qi;

    if ((qi = qf_cmd_get_stack(eap, FALSE)) == NULL)
	return 0;
    return qf_get_curlist(qi)->qf_count;
}


qf_clean_dir_stack(struct dir_stack_T **stackptr)
{
    struct dir_stack_T  *ds_ptr;

    while ((ds_ptr = *stackptr) != NULL)
    {
	*stackptr = (*stackptr)->next;
	vim_free(ds_ptr->dirname);
	vim_free(ds_ptr);
    }
}


qf_mark_adjust(
	win_T	*wp,
	linenr_T	line1,
	linenr_T	line2,
	long	amount,
	long	amount_after)
{
    int		i;
    qfline_T	*qfp;
    int		idx;
    qf_info_T	*qi = &ql_info;
    int		found_one = FALSE;
    int		buf_has_flag = wp == NULL ? BUF_HAS_QF_ENTRY : BUF_HAS_LL_ENTRY;

    if (!(curbuf->b_has_qf_entry & buf_has_flag))
	return;
    if (wp != NULL)
    {
	if (wp->w_llist == NULL)
	    return;
	qi = wp->w_llist;
    }

    for (idx = 0; idx < qi->qf_listcount; ++idx)
    {
	qf_list_T	*qfl = qf_get_list(qi, idx);

	if (!qf_list_empty(qfl))
	    FOR_ALL_QFL_ITEMS(qfl, qfp, i)
		if (qfp->qf_fnum == curbuf->b_fnum)
		{
		    found_one = TRUE;
		    if (qfp->qf_lnum >= line1 && qfp->qf_lnum <= line2)
		    {
			if (amount == MAXLNUM)
			    qfp->qf_cleared = TRUE;
			else
			    qfp->qf_lnum += amount;
		    }
		    else if (amount_after && qfp->qf_lnum > line2)
			qfp->qf_lnum += amount_after;
		}
    }

    if (!found_one)
	curbuf->b_has_qf_entry &= ~buf_has_flag;
}


qf_parse_line_nomatch(char_u *linebuf, int linelen, qffields_T *fields)
{
    fields->namebuf[0] = NUL;	// no match found, remove file name
    fields->lnum = 0;		// don't jump to this line
    fields->valid = FALSE;

    return copy_nonerror_line(linebuf, linelen, fields);
}


qf_getprop_ctx(qf_list_T *qfl, dict_T *retdict)
{
    int		status;
    dictitem_T	*di;

    if (qfl->qf_ctx != NULL)
    {
	di = dictitem_alloc((char_u *)"context");
	if (di != NULL)
	{
	    copy_tv(qfl->qf_ctx, &di->di_tv);
	    status = dict_add(retdict, di);
	    if (status == FAIL)
		dictitem_free(di);
	}
	else
	    status = FAIL;
    }
    else
	status = dict_add_string(retdict, "context", (char_u *)"");

    return status;
}


qf_setprop_curidx(qf_info_T *qi, qf_list_T *qfl, dictitem_T *di)
{
    int		denote = FALSE;
    int		newidx;
    int		old_qfidx;
    qfline_T	*qf_ptr;

    // If the specified index is '$', then use the last entry
    if (di->di_tv.v_type == VAR_STRING
	    && di->di_tv.vval.v_string != NULL
	    && STRCMP(di->di_tv.vval.v_string, "$") == 0)
	newidx = qfl->qf_count;
    else
    {
	// Otherwise use the specified index
	newidx = tv_get_number_chk(&di->di_tv, &denote);
	if (denote)
	    return FAIL;
    }

    if (newidx < 1)		// sanity check
	return FAIL;
    if (newidx > qfl->qf_count)
	newidx = qfl->qf_count;

    old_qfidx = qfl->qf_index;
    qf_ptr = get_nth_entry(qfl, newidx, &newidx);
    if (qf_ptr == NULL)
	return FAIL;
    qfl->qf_ptr = qf_ptr;
    qfl->qf_index = newidx;

    // If the current list is modified and it is displayed in the quickfix
    // window, then Update it.
    if (qf_get_curlist(qi)->qf_id == qfl->qf_id)
	qf_win_pos_update(qi, old_qfidx);

    return OK;
}


qf_getprop_items(qf_info_T *qi, int qf_idx, int eidx, dict_T *retdict)
{
    int		status = OK;
    list_T	*l = list_alloc();
    if (l != NULL)
    {
	(void)get_errorlist(qi, NULL, qf_idx, eidx, l);
	dict_add_list(retdict, "items", l);
    }
    else
	status = FAIL;

    return status;
}


get_qf_loc_list(int is_qf, win_T *wp, typval_T *what_arg, typval_T *rettv)
{
    if (what_arg->v_type == VAR_UNKNOWN)
    {
	if (rettv_list_alloc(rettv) == OK)
	    if (is_qf || wp != NULL)
		(void)get_errorlist(NULL, wp, -1, 0, rettv->vval.v_list);
    }
    else
    {
	if (rettv_dict_alloc(rettv) == OK)
	    if (is_qf || (wp != NULL))
	    {
		if (what_arg->v_type == VAR_DICT)
		{
		    dict_T	*d = what_arg->vval.v_dict;

		    if (d != NULL)
			qf_get_properties(wp, d, rettv->vval.v_dict);
		}
		else
		    emsg(_(e_dictionary_required));
	    }
    }
}


qf_id2nr(qf_info_T *qi, int_u qfid)
{
    int		qf_idx;

    for (qf_idx = 0; qf_idx < qi->qf_listcount; qf_idx++)
	if (qi->qf_lists[qf_idx].qf_id == qfid)
	    return qf_idx;
    return INVALID_QFIDX;
}


qf_set_title_var(qf_list_T *qfl)
{
    if (qfl->qf_title != NULL)
	set_internal_string_var((char_u *)"w:quickfix_title", qfl->qf_title);
}


hgr_search_in_rtp(qf_list_T *qfl, regmatch_T *p_regmatch, char_u *lang)
{
    char_u	*p;

    vimconv_T	vc;

    // Help files are in utf-8 or latin1, convert lines when 'encoding'
    // differs.
    vc.vc_type = CONV_NONE;
    if (!enc_utf8)
	convert_setup(&vc, (char_u *)"utf-8", p_enc);

    // Go through all the directories in 'runtimepath'
    p = p_rtp;
    while (*p != NUL && !got_int)
    {
	copy_option_part(&p, NameBuff, MAXPATHL, ",");

	hgr_search_files_in_dir(qfl, NameBuff, p_regmatch, &vc
#ifdef FEAT_MULTI_LANG
		, lang
#endif
		);
    }

    if (vc.vc_type != CONV_NONE)
	convert_setup(&vc, NULL, NULL);
}


copy_nonerror_line(char_u *linebuf, int linelen, qffields_T *fields)
{
    char_u	*p;

    if (linelen >= fields->errmsglen)
    {
	// linelen + null terminator
	if ((p = vim_realloc(fields->errmsg, linelen + 1)) == NULL)
	    return QF_NOMEM;
	fields->errmsg = p;
	fields->errmsglen = linelen + 1;
    }
    // copy whole line to error message
    vim_strncpy(fields->errmsg, linebuf, linelen);

    return QF_OK;
}


qf_getprop_qfidx(qf_info_T *qi, dict_T *what)
{
    int		qf_idx;
    dictitem_T	*di;

    qf_idx = qi->qf_curlist;	// default is the current list
    if ((di = dict_find(what, (char_u *)"nr", -1)) != NULL)
    {
	// Use the specified quickfix/location list
	if (di->di_tv.v_type == VAR_NUMBER)
	{
	    // for zero use the current list
	    if (di->di_tv.vval.v_number != 0)
	    {
		qf_idx = di->di_tv.vval.v_number - 1;
		if (qf_idx < 0 || qf_idx >= qi->qf_listcount)
		    qf_idx = INVALID_QFIDX;
	    }
	}
	else if (di->di_tv.v_type == VAR_STRING
		&& di->di_tv.vval.v_string != NULL
		&& STRCMP(di->di_tv.vval.v_string, "$") == 0)
	    // Get the last quickfix list number
	    qf_idx = qi->qf_listcount - 1;
	else
	    qf_idx = INVALID_QFIDX;
    }

    if ((di = dict_find(what, (char_u *)"id", -1)) != NULL)
    {
	// Look for a list with the specified id
	if (di->di_tv.v_type == VAR_NUMBER)
	{
	    // For zero, use the current list or the list specified by 'nr'
	    if (di->di_tv.vval.v_number != 0)
		qf_idx = qf_id2nr(qi, di->di_tv.vval.v_number);
	}
	else
	    qf_idx = INVALID_QFIDX;
    }

    return qf_idx;
}


qf_parse_fmt_n(regmatch_T *rmp, int midx, qffields_T *fields)
{
    if (rmp->startp[midx] == NULL)
	return QF_FAIL;
    fields->enr = (int)atol((char *)rmp->startp[midx]);
    return QF_OK;
}


qf_range_text(qfline_T *qfp, char_u *buf, int bufsize)
{
    int len;
    vim_snprintf((char *)buf, bufsize, "%ld", qfp->qf_lnum);
    len = (int)STRLEN(buf);

    if (qfp->qf_end_lnum > 0 && qfp->qf_lnum != qfp->qf_end_lnum)
    {
	vim_snprintf((char *)buf + len, bufsize - len,
		"-%ld", qfp->qf_end_lnum);
	len += (int)STRLEN(buf + len);
    }
    if (qfp->qf_col > 0)
    {
	vim_snprintf((char *)buf + len, bufsize - len, " col %d", qfp->qf_col);
	len += (int)STRLEN(buf + len);
	if (qfp->qf_end_col > 0 && qfp->qf_col != qfp->qf_end_col)
	{
	    vim_snprintf((char *)buf + len, bufsize - len,
		    "-%d", qfp->qf_end_col);
	    len += (int)STRLEN(buf + len);
	}
    }
    buf[len] = NUL;
}


qf_update_win_titlevar(qf_info_T *qi)
{
    qf_list_T	*qfl = qf_get_curlist(qi);
    tabpage_T	*tp;
    win_T	*win;
    win_T	*save_curwin = curwin;

    FOR_ALL_TAB_WINDOWS(tp, win)
    {
	if (is_qf_win(win, qi))
	{
	    curwin = win;
	    qf_set_title_var(qfl);
	}
    }
    curwin = save_curwin;
}


qf_setprop_get_qfidx(
	qf_info_T	*qi,
	dict_T		*what,
	int		action,
	int		*newlist)
{
    dictitem_T	*di;
    int		qf_idx = qi->qf_curlist;    // default is the current list

    if ((di = dict_find(what, (char_u *)"nr", -1)) != NULL)
    {
	// Use the specified quickfix/location list
	if (di->di_tv.v_type == VAR_NUMBER)
	{
	    // for zero use the current list
	    if (di->di_tv.vval.v_number != 0)
		qf_idx = di->di_tv.vval.v_number - 1;

	    if ((action == ' ' || action == 'a') && qf_idx == qi->qf_listcount)
	    {
		// When creating a new list, accept qf_idx pointing to the next
		// non-available list and add the new list at the end of the
		// stack.
		*newlist = TRUE;
		qf_idx = qf_stack_empty(qi) ? 0 : qi->qf_listcount - 1;
	    }
	    else if (qf_idx < 0 || qf_idx >= qi->qf_listcount)
		return INVALID_QFIDX;
	    else if (action != ' ')
		*newlist = FALSE;	// use the specified list
	}
	else if (di->di_tv.v_type == VAR_STRING
		&& di->di_tv.vval.v_string != NULL
		&& STRCMP(di->di_tv.vval.v_string, "$") == 0)
	{
	    if (!qf_stack_empty(qi))
		qf_idx = qi->qf_listcount - 1;
	    else if (*newlist)
		qf_idx = 0;
	    else
		return INVALID_QFIDX;
	}
	else
	    return INVALID_QFIDX;
    }

    if (!*newlist && (di = dict_find(what, (char_u *)"id", -1)) != NULL)
    {
	// Use the quickfix/location list with the specified id
	if (di->di_tv.v_type != VAR_NUMBER)
	    return INVALID_QFIDX;

	return qf_id2nr(qi, di->di_tv.vval.v_number);
    }

    return qf_idx;
}


qf_parse_fmt_v(regmatch_T *rmp, int midx, qffields_T *fields)
{
    if (rmp->startp[midx] == NULL)
	return QF_FAIL;
    fields->col = (int)atol((char *)rmp->startp[midx]);
    fields->use_viscol = TRUE;
    return QF_OK;
}


qf_goto_win_with_qfl_file(int qf_fnum)
{
    win_T	*win;
    win_T	*altwin;

    win = curwin;
    altwin = NULL;
    for (;;)
    {
	if (win->w_buffer->b_fnum == qf_fnum)
	    break;
	if (win->w_prev == NULL)
	    win = lastwin;	// wrap around the top
	else
	    win = win->w_prev;	// go to previous window

	if (IS_QF_WINDOW(win))
	{
	    // Didn't find it, go to the window before the quickfix
	    // window, unless 'switchbuf' contains 'uselast': in this case we
	    // try to jump to the previously used window first.
	    if ((swb_flags & SWB_USELAST) && win_valid(prevwin))
		win = prevwin;
	    else if (altwin != NULL)
		win = altwin;
	    else if (curwin->w_prev != NULL)
		win = curwin->w_prev;
	    else
		win = curwin->w_next;
	    break;
	}

	// Remember a usable window.
	if (altwin == NULL && !win->w_p_pvw && bt_normal(win->w_buffer))
	    altwin = win;
    }

    win_goto(win);
}


qf_pop_dir(struct dir_stack_T **stackptr)
{
    struct dir_stack_T  *ds_ptr;

    // TODO: Should we check if dirbuf is the directory on top of the stack?
    // What to do if it isn't?

    // pop top element and free it
    if (*stackptr != NULL)
    {
	ds_ptr = *stackptr;
	*stackptr = (*stackptr)->next;
	vim_free(ds_ptr->dirname);
	vim_free(ds_ptr);
    }

    // return NEW top element as current dir or NULL if stack is empty
    return *stackptr ? (*stackptr)->dirname : NULL;
}


qf_current_entry(win_T *wp)
{
    qf_info_T	*qi = &ql_info;

    if (IS_LL_WINDOW(wp))
	// In the location list window, use the referenced location list
	qi = wp->w_llist_ref;

    return qf_get_curlist(qi)->qf_index;
}


qf_free_fields(qffields_T *pfields)
{
    vim_free(pfields->namebuf);
    vim_free(pfields->module);
    vim_free(pfields->errmsg);
    vim_free(pfields->pattern);
}


qf_setprop_context(qf_list_T *qfl, dictitem_T *di)
{
    typval_T	*ctx;

    free_tv(qfl->qf_ctx);
    ctx =  alloc_tv();
    if (ctx != NULL)
	copy_tv(&di->di_tv, ctx);
    qfl->qf_ctx = ctx;

    return OK;
}


qf_parse_fmt_t(regmatch_T *rmp, int midx, qffields_T *fields)
{
    if (rmp->startp[midx] == NULL)
	return QF_FAIL;
    fields->type = *rmp->startp[midx];
    return QF_OK;
}


get_mef_name(void)
{
    char_u	*p;
    char_u	*name;
    static int	start = -1;
    static int	off = 0;
#ifdef HAVE_LSTAT
    stat_T	sb;
#endif

    if (*p_mef == NUL)
    {
	name = vim_tempname('e', FALSE);
	if (name == NULL)
	    emsg(_(e_cant_get_temp_file_name));
	return name;
    }

    for (p = p_mef; *p; ++p)
	if (p[0] == '#' && p[1] == '#')
	    break;

    if (*p == NUL)
	return vim_strsave(p_mef);

    // Keep trying until the name doesn't exist yet.
    for (;;)
    {
	if (start == -1)
	    start = mch_get_pid();
	else
	    off += 19;

	name = alloc_id(STRLEN(p_mef) + 30, aid_qf_mef_name);
	if (name == NULL)
	    break;
	STRCPY(name, p_mef);
	sprintf((char *)name + (p - p_mef), "%d%d", start, off);
	STRCAT(name, p + 2);
	if (mch_getperm(name) < 0
#ifdef HAVE_LSTAT
		    // Don't accept a symbolic link, it's a security risk.
		    && mch_lstat((char *)name, &sb) < 0
#endif
		)
	    break;
	vim_free(name);
    }
    return name;
}


qf_parse_fmt_s(regmatch_T *rmp, int midx, qffields_T *fields)
{
    int		len;

    if (rmp->startp[midx] == NULL || rmp->endp[midx] == NULL)
	return QF_FAIL;
    len = (int)(rmp->endp[midx] - rmp->startp[midx]);
    if (len > CMDBUFFSIZE - 5)
	len = CMDBUFFSIZE - 5;
    STRCPY(fields->pattern, "^\\V");
    STRNCAT(fields->pattern, rmp->startp[midx], len);
    fields->pattern[len + 3] = '\\';
    fields->pattern[len + 4] = '$';
    fields->pattern[len + 5] = NUL;
    return QF_OK;
}


ex_cclose(exarg_T *eap)
{
    win_T	*win = NULL;
    qf_info_T	*qi;

    if ((qi = qf_cmd_get_stack(eap, FALSE)) == NULL)
	return;

    // Find existing quickfix window and close it.
    win = qf_find_win(qi);
    if (win != NULL)
	win_close(win, FALSE);
}


efm_option_part_len(char_u *efm)
{
    int len;

    for (len = 0; efm[len] != NUL && efm[len] != ','; ++len)
	if (efm[len] == '\\' && efm[len + 1] != NUL)
	    ++len;

    return len;
}


qf_age(exarg_T *eap)
{
    qf_info_T	*qi;
    int		count;

    if ((qi = qf_cmd_get_stack(eap, TRUE)) == NULL)
	return;

    if (eap->addr_count != 0)
	count = eap->line2;
    else
	count = 1;
    while (count--)
    {
	if (eap->cmdidx == CMD_colder || eap->cmdidx == CMD_lolder)
	{
	    if (qi->qf_curlist == 0)
	    {
		emsg(_(e_at_bottom_of_quickfix_stack));
		break;
	    }
	    --qi->qf_curlist;
	}
	else
	{
	    if (qi->qf_curlist >= qi->qf_listcount - 1)
	    {
		emsg(_(e_at_top_of_quickfix_stack));
		break;
	    }
	    ++qi->qf_curlist;
	}
    }
    qf_msg(qi, qi->qf_curlist, "");
    qf_update_buffer(qi, NULL);
}


ex_cexpr(exarg_T *eap)
{
    typval_T	*tv;

    if (trigger_cexpr_autocmd(eap->cmdidx) == FAIL)
	return;

    // Evaluate the expression.  When the result is a string or a list we can
    // use it to fill the errorlist.
    tv = eval_expr(eap->arg, eap);
    if (tv != NULL)
    {
	(void)cexpr_core(eap, tv);
	free_tv(tv);
    }
}


qf_parse_fmt_o(regmatch_T *rmp, int midx, qffields_T *fields)
{
    int		len;

    if (rmp->startp[midx] == NULL || rmp->endp[midx] == NULL)
	return QF_FAIL;
    len = (int)(rmp->endp[midx] - rmp->startp[midx]);
    if (len > CMDBUFFSIZE)
	len = CMDBUFFSIZE;
    STRNCAT(fields->module, rmp->startp[midx], len);
    return QF_OK;
}


ex_cfile(exarg_T *eap)
{
    char_u	*enc = NULL;
    win_T	*wp = NULL;
    qf_info_T	*qi = &ql_info;
    char_u	*au_name = NULL;
    int_u	save_qfid = 0;		// init for gcc
    int		res;

    au_name = cfile_get_auname(eap->cmdidx);
    if (au_name != NULL && apply_autocmds(EVENT_QUICKFIXCMDPRE, au_name,
							NULL, FALSE, curbuf))
    {
#ifdef FEAT_EVAL
	if (aborting())
	    return;
#endif
    }

    enc = (*curbuf->b_p_menc != NUL) ? curbuf->b_p_menc : p_menc;
#ifdef FEAT_BROWSE
    if (cmdmod.cmod_flags & CMOD_BROWSE)
    {
	char_u *browse_file = do_browse(0, (char_u *)_("Error file"), eap->arg,
				   NULL, NULL,
				   (char_u *)_(BROWSE_FILTER_ALL_FILES), NULL);
	if (browse_file == NULL)
	    return;
	set_string_option_direct((char_u *)"ef", -1, browse_file, OPT_FREE, 0);
	vim_free(browse_file);
    }
    else
#endif
    if (*eap->arg != NUL)
	set_string_option_direct((char_u *)"ef", -1, eap->arg, OPT_FREE, 0);

    if (is_loclist_cmd(eap->cmdidx))
	wp = curwin;

    incr_quickfix_busy();

    // This function is used by the :cfile, :cgetfile and :caddfile
    // commands.
    // :cfile always creates a new quickfix list and jumps to the
    // first error.
    // :cgetfile creates a new quickfix list but doesn't jump to the
    // first error.
    // :caddfile adds to an existing quickfix list. If there is no
    // quickfix list then a new list is created.
    res = qf_init(wp, p_ef, p_efm, (eap->cmdidx != CMD_caddfile
			&& eap->cmdidx != CMD_laddfile),
			qf_cmdtitle(*eap->cmdlinep), enc);
    if (wp != NULL)
    {
	qi = GET_LOC_LIST(wp);
	if (qi == NULL)
	{
	    decr_quickfix_busy();
	    return;
	}
    }
    if (res >= 0)
	qf_list_changed(qf_get_curlist(qi));
    save_qfid = qf_get_curlist(qi)->qf_id;
    if (au_name != NULL)
	apply_autocmds(EVENT_QUICKFIXCMDPOST, au_name, NULL, FALSE, curbuf);

    // Jump to the first error for a new list and if autocmds didn't
    // free the list.
    if (res > 0 && (eap->cmdidx == CMD_cfile || eap->cmdidx == CMD_lfile)
	    && qflist_valid(wp, save_qfid))
	// display the first error
	qf_jump_first(qi, save_qfid, eap->forceit);

    decr_quickfix_busy();
}


get_nth_valid_entry(
	qf_list_T	*qfl,
	int		errornr,
	int		dir,
	int		*new_qfidx)
{
    qfline_T		*qf_ptr = qfl->qf_ptr;
    int			qf_idx = qfl->qf_index;
    qfline_T		*prev_qf_ptr;
    int			prev_index;
    char		*err = e_no_more_items;

    while (errornr--)
    {
	prev_qf_ptr = qf_ptr;
	prev_index = qf_idx;

	if (dir == FORWARD || dir == FORWARD_FILE)
	    qf_ptr = get_next_valid_entry(qfl, qf_ptr, &qf_idx, dir);
	else
	    qf_ptr = get_prev_valid_entry(qfl, qf_ptr, &qf_idx, dir);
	if (qf_ptr == NULL)
	{
	    qf_ptr = prev_qf_ptr;
	    qf_idx = prev_index;
	    if (err != NULL)
	    {
		emsg(_(err));
		return NULL;
	    }
	    break;
	}

	err = NULL;
    }

    *new_qfidx = qf_idx;
    return qf_ptr;
}


qf_get_cur_valid_idx(exarg_T *eap)
{
    qf_info_T	*qi;
    qf_list_T	*qfl;
    qfline_T	*qfp;
    int		i, eidx = 0;
    int		prev_fnum = 0;

    if ((qi = qf_cmd_get_stack(eap, FALSE)) == NULL)
	return 1;

    qfl = qf_get_curlist(qi);
    qfp = qfl->qf_start;

    // check if the list has valid errors
    if (!qf_list_has_valid_entries(qfl))
	return 1;

    for (i = 1; i <= qfl->qf_index && qfp!= NULL; i++, qfp = qfp->qf_next)
    {
	if (qfp->qf_valid)
	{
	    if (eap->cmdidx == CMD_cfdo || eap->cmdidx == CMD_lfdo)
	    {
		if (qfp->qf_fnum > 0 && qfp->qf_fnum != prev_fnum)
		{
		    // Count the number of files
		    eidx++;
		    prev_fnum = qfp->qf_fnum;
		}
	    }
	    else
		eidx++;
	}
    }

    return eidx ? eidx : 1;
}


qf_parse_fmt_c(regmatch_T *rmp, int midx, qffields_T *fields)
{
    if (rmp->startp[midx] == NULL)
	return QF_FAIL;
    fields->col = (int)atol((char *)rmp->startp[midx]);
    return QF_OK;
}


qf_add_entry(
    qf_list_T	*qfl,		// quickfix list entry
    char_u	*dir,		// optional directory name
    char_u	*fname,		// file name or NULL
    char_u	*module,	// module name or NULL
    int		bufnum,		// buffer number or zero
    char_u	*mesg,		// message
    long	lnum,		// line number
    long	end_lnum,	// line number for end
    int		col,		// column
    int		end_col,	// column for end
    int		vis_col,	// using visual column
    char_u	*pattern,	// search pattern
    int		nr,		// error number
    int		type,		// type character
    int		valid)		// valid entry
{
    qfline_T	*qfp;
    qfline_T	**lastp;	// pointer to qf_last or NULL

    if ((qfp = ALLOC_ONE_ID(qfline_T, aid_qf_qfline)) == NULL)
	return QF_FAIL;
    if (bufnum != 0)
    {
	buf_T *buf = buflist_findnr(bufnum);

	qfp->qf_fnum = bufnum;
	if (buf != NULL)
	    buf->b_has_qf_entry |=
		IS_QF_LIST(qfl) ? BUF_HAS_QF_ENTRY : BUF_HAS_LL_ENTRY;
    }
    else
	qfp->qf_fnum = qf_get_fnum(qfl, dir, fname);
    if ((qfp->qf_text = vim_strsave(mesg)) == NULL)
    {
	vim_free(qfp);
	return QF_FAIL;
    }
    qfp->qf_lnum = lnum;
    qfp->qf_end_lnum = end_lnum;
    qfp->qf_col = col;
    qfp->qf_end_col = end_col;
    qfp->qf_viscol = vis_col;
    if (pattern == NULL || *pattern == NUL)
	qfp->qf_pattern = NULL;
    else if ((qfp->qf_pattern = vim_strsave(pattern)) == NULL)
    {
	vim_free(qfp->qf_text);
	vim_free(qfp);
	return QF_FAIL;
    }
    if (module == NULL || *module == NUL)
	qfp->qf_module = NULL;
    else if ((qfp->qf_module = vim_strsave(module)) == NULL)
    {
	vim_free(qfp->qf_text);
	vim_free(qfp->qf_pattern);
	vim_free(qfp);
	return QF_FAIL;
    }
    qfp->qf_nr = nr;
    if (type != 1 && !vim_isprintc(type)) // only printable chars allowed
	type = 0;
    qfp->qf_type = type;
    qfp->qf_valid = valid;

    lastp = &qfl->qf_last;
    if (qf_list_empty(qfl))		// first element in the list
    {
	qfl->qf_start = qfp;
	qfl->qf_ptr = qfp;
	qfl->qf_index = 0;
	qfp->qf_prev = NULL;
    }
    else
    {
	qfp->qf_prev = *lastp;
	(*lastp)->qf_next = qfp;
    }
    qfp->qf_next = NULL;
    qfp->qf_cleared = FALSE;
    *lastp = qfp;
    ++qfl->qf_count;
    if (qfl->qf_index == 0 && qfp->qf_valid)	// first valid entry
    {
	qfl->qf_index = qfl->qf_count;
	qfl->qf_ptr = qfp;
    }

    return QF_OK;
}


qf_get_nextline(qfstate_T *state)
{
    int status = QF_FAIL;

    if (state->fd == NULL)
    {
	if (state->tv != NULL)
	{
	    if (state->tv->v_type == VAR_STRING)
		// Get the next line from the supplied string
		status = qf_get_next_str_line(state);
	    else if (state->tv->v_type == VAR_LIST)
		// Get the next line from the supplied list
		status = qf_get_next_list_line(state);
	}
	else
	    // Get the next line from the supplied buffer
	    status = qf_get_next_buf_line(state);
    }
    else
	// Get the next line from the supplied file
	status = qf_get_next_file_line(state);

    if (status != QF_OK)
	return status;

    // remove newline/CR from the line
    if (state->linelen > 0 && state->linebuf[state->linelen - 1] == '\n')
    {
	state->linebuf[state->linelen - 1] = NUL;
#ifdef USE_CRNL
	if (state->linelen > 1 && state->linebuf[state->linelen - 2] == '\r')
	    state->linebuf[state->linelen - 2] = NUL;
#endif
    }

    remove_bom(state->linebuf);

    return QF_OK;
}


ex_cbuffer(exarg_T *eap)
{
    buf_T	*buf = NULL;
    qf_info_T	*qi;
    char_u	*au_name = NULL;
    int		res;
    int_u	save_qfid;
    win_T	*wp = NULL;
    char_u	*qf_title;
    linenr_T	line1;
    linenr_T	line2;

    au_name = cbuffer_get_auname(eap->cmdidx);
    if (au_name != NULL && apply_autocmds(EVENT_QUICKFIXCMDPRE, au_name,
					curbuf->b_fname, TRUE, curbuf))
    {
#ifdef FEAT_EVAL
	if (aborting())
	    return;
#endif
    }

    // Must come after autocommands.
    qi = qf_cmd_get_or_alloc_stack(eap, &wp);
    if (qi == NULL)
	return;

    if (cbuffer_process_args(eap, &buf, &line1, &line2) == FAIL)
	return;

    qf_title = qf_cmdtitle(*eap->cmdlinep);

    if (buf->b_sfname)
    {
	vim_snprintf((char *)IObuff, IOSIZE, "%s (%s)",
		(char *)qf_title, (char *)buf->b_sfname);
	qf_title = IObuff;
    }

    incr_quickfix_busy();

    res = qf_init_ext(qi, qi->qf_curlist, NULL, buf, NULL, p_efm,
	    (eap->cmdidx != CMD_caddbuffer
	     && eap->cmdidx != CMD_laddbuffer),
	    line1, line2,
	    qf_title, NULL);
    if (qf_stack_empty(qi))
    {
	decr_quickfix_busy();
	return;
    }
    if (res >= 0)
	qf_list_changed(qf_get_curlist(qi));

    // Remember the current quickfix list identifier, so that we can
    // check for autocommands changing the current quickfix list.
    save_qfid = qf_get_curlist(qi)->qf_id;
    if (au_name != NULL)
    {
	buf_T *curbuf_old = curbuf;

	apply_autocmds(EVENT_QUICKFIXCMDPOST, au_name, curbuf->b_fname,
								TRUE, curbuf);
	if (curbuf != curbuf_old)
	    // Autocommands changed buffer, don't jump now, "qi" may
	    // be invalid.
	    res = 0;
    }
    // Jump to the first error for a new list and if autocmds didn't
    // free the list.
    if (res > 0 && (eap->cmdidx == CMD_cbuffer ||
		eap->cmdidx == CMD_lbuffer)
	    && qflist_valid(wp, save_qfid))
	// display the first error
	qf_jump_first(qi, save_qfid, eap->forceit);

    decr_quickfix_busy();
}


qf_free_stack(win_T *wp, qf_info_T *qi)
{
    win_T	*qfwin = qf_find_win(qi);
    win_T	*llwin = NULL;

    if (qfwin != NULL)
    {
	// If the quickfix/location list window is open, then clear it
	if (qi->qf_curlist < qi->qf_listcount)
	    qf_free(qf_get_curlist(qi));
	qf_update_buffer(qi, NULL);
    }

    if (wp != NULL && IS_LL_WINDOW(wp))
    {
	// If in the location list window, then use the non-location list
	// window with this location list (if present)
	llwin = qf_find_win_with_loclist(qi);
	if (llwin != NULL)
	    wp = llwin;
    }

    qf_free_all(wp);
    if (wp == NULL)
    {
	// quickfix list
	qi->qf_curlist = 0;
	qi->qf_listcount = 0;
    }
    else if (qfwin != NULL)
    {
	// If the location list window is open, then create a new empty
	// location list
	qf_info_T *new_ll = qf_alloc_stack(QFLT_LOCATION);

	if (new_ll != NULL)
	{
	    new_ll->qf_bufnr = qfwin->w_buffer->b_fnum;

	    // first free the list reference in the location list window
	    ll_free_all(&qfwin->w_llist_ref);

	    qfwin->w_llist_ref = new_ll;
	    if (wp != qfwin)
		win_set_loclist(wp, new_ll);
	}
    }
}


qf_store_title(qf_list_T *qfl, char_u *title)
{
    VIM_CLEAR(qfl->qf_title);

    if (title != NULL)
    {
	char_u *p = alloc_id(STRLEN(title) + 2, aid_qf_title);

	qfl->qf_title = p;
	if (p != NULL)
	    STRCPY(p, title);
    }
}


hgr_search_files_in_dir(
	qf_list_T *qfl,
	char_u *dirname,
	regmatch_T *p_regmatch,
	vimconv_T *p_vc
#ifdef FEAT_MULTI_LANG
	, char_u *lang
#endif
	)
{
    int		fcount;
    char_u	**fnames;
    int		fi;

    // Find all "*.txt" and "*.??x" files in the "doc" directory.
    add_pathsep(dirname);
    STRCAT(dirname, "doc/*.\\(txt\\|??x\\)");
    if (gen_expand_wildcards(1, &dirname, &fcount,
		&fnames, EW_FILE|EW_SILENT) == OK
	    && fcount > 0)
    {
	for (fi = 0; fi < fcount && !got_int; ++fi)
	{
#ifdef FEAT_MULTI_LANG
	    // Skip files for a different language.
	    if (lang != NULL
		    && STRNICMP(lang, fnames[fi]
				    + STRLEN(fnames[fi]) - 3, 2) != 0
		    && !(STRNICMP(lang, "en", 2) == 0
			&& STRNICMP("txt", fnames[fi]
			    + STRLEN(fnames[fi]) - 3, 3) == 0))
		continue;
#endif

	    hgr_search_file(qfl, fnames[fi], p_vc, p_regmatch);
	}
	FreeWild(fcount, fnames);
    }
}


grep_internal(cmdidx_T cmdidx)
{
    return ((cmdidx == CMD_grep
		|| cmdidx == CMD_lgrep
		|| cmdidx == CMD_grepadd
		|| cmdidx == CMD_lgrepadd)
	    && STRCMP("internal",
			*curbuf->b_p_gp == NUL ? p_gp : curbuf->b_p_gp) == 0);
}


qf_getprop_qfbufnr(qf_info_T *qi, dict_T *retdict)
{
    int	bufnum = 0;

    if (qi != NULL && buflist_findnr(qi->qf_bufnr) != NULL)
	bufnum = qi->qf_bufnr;

    return dict_add_number(retdict, "qfbufnr", bufnum);
}


get_qfline_items(qfline_T *qfp, list_T *list)
{
    int		bufnum;
    dict_T	*dict;
    char_u	buf[2];

    // Handle entries with a non-existing buffer number.
    bufnum = qfp->qf_fnum;
    if (bufnum != 0 && (buflist_findnr(bufnum) == NULL))
	bufnum = 0;

    if ((dict = dict_alloc()) == NULL)
	return FAIL;
    if (list_append_dict(list, dict) == FAIL)
	return FAIL;

    buf[0] = qfp->qf_type;
    buf[1] = NUL;
    if (dict_add_number(dict, "bufnr", (long)bufnum) == FAIL
	    || dict_add_number(dict, "lnum",     (long)qfp->qf_lnum) == FAIL
	    || dict_add_number(dict, "end_lnum", (long)qfp->qf_end_lnum) == FAIL
	    || dict_add_number(dict, "col",      (long)qfp->qf_col) == FAIL
	    || dict_add_number(dict, "end_col",  (long)qfp->qf_end_col) == FAIL
	    || dict_add_number(dict, "vcol",     (long)qfp->qf_viscol) == FAIL
	    || dict_add_number(dict, "nr",       (long)qfp->qf_nr) == FAIL
	    || dict_add_string(dict, "module", qfp->qf_module) == FAIL
	    || dict_add_string(dict, "pattern", qfp->qf_pattern) == FAIL
	    || dict_add_string(dict, "text", qfp->qf_text) == FAIL
	    || dict_add_string(dict, "type", buf) == FAIL
	    || dict_add_number(dict, "valid", (long)qfp->qf_valid) == FAIL)
	return FAIL;

    return OK;
}


efmpat_to_regpat(
	char_u	*efmpat,
	char_u	*regpat,
	efm_T	*efminfo,
	int	idx,
	int	round)
{
    char_u	*srcptr;

    if (efminfo->addr[idx])
    {
	// Each errorformat pattern can occur only once
	semsg(_(e_too_many_chr_in_format_string), *efmpat);
	return NULL;
    }
    if ((idx && idx < FMT_PATTERN_R
		&& vim_strchr((char_u *)"DXOPQ", efminfo->prefix) != NULL)
	    || (idx == FMT_PATTERN_R
		&& vim_strchr((char_u *)"OPQ", efminfo->prefix) == NULL))
    {
	semsg(_(e_unexpected_chr_in_format_str), *efmpat);
	return NULL;
    }
    efminfo->addr[idx] = (char_u)++round;
    *regpat++ = '\\';
    *regpat++ = '(';
#ifdef BACKSLASH_IN_FILENAME
    if (*efmpat == 'f')
    {
	// Also match "c:" in the file name, even when
	// checking for a colon next: "%f:".
	// "\%(\a:\)\="
	STRCPY(regpat, "\\%(\\a:\\)\\=");
	regpat += 10;
    }
#endif
    if (*efmpat == 'f' && efmpat[1] != NUL)
    {
	if (efmpat[1] != '\\' && efmpat[1] != '%')
	{
	    // A file name may contain spaces, but this isn't
	    // in "\f".  For "%f:%l:%m" there may be a ":" in
	    // the file name.  Use ".\{-1,}x" instead (x is
	    // the next character), the requirement that :999:
	    // follows should work.
	    STRCPY(regpat, ".\\{-1,}");
	    regpat += 7;
	}
	else
	{
	    // File name followed by '\\' or '%': include as
	    // many file name chars as possible.
	    STRCPY(regpat, "\\f\\+");
	    regpat += 4;
	}
    }
    else
    {
	srcptr = (char_u *)fmt_pat[idx].pattern;
	while ((*regpat = *srcptr++) != NUL)
	    ++regpat;
    }
    *regpat++ = '\\';
    *regpat++ = ')';

    return regpat;
}


is_qf_entry_present(qf_list_T *qfl, qfline_T *qf_ptr)
{
    qfline_T	*qfp;
    int		i;

    // Search for the entry in the current list
    FOR_ALL_QFL_ITEMS(qfl, qfp, i)
	if (qfp == qf_ptr)
	    break;

    if (i > qfl->qf_count) // Entry is not found
	return FALSE;

    return TRUE;
}


qf_parse_fmt_f(regmatch_T *rmp, int midx, qffields_T *fields, int prefix)
{
    int c;

    if (rmp->startp[midx] == NULL || rmp->endp[midx] == NULL)
	return QF_FAIL;

    // Expand ~/file and $HOME/file to full path.
    c = *rmp->endp[midx];
    *rmp->endp[midx] = NUL;
    expand_env(rmp->startp[midx], fields->namebuf, CMDBUFFSIZE);
    *rmp->endp[midx] = c;

    // For separate filename patterns (%O, %P and %Q), the specified file
    // should exist.
    if (vim_strchr((char_u *)"OPQ", prefix) != NULL
	    && mch_getperm(fields->namebuf) == -1)
	return QF_FAIL;

    return QF_OK;
}


vgr_process_files(
	win_T		*wp,
	qf_info_T	*qi,
	vgr_args_T	*cmd_args,
	int		*redraw_for_dummy,
	buf_T		**first_match_buf,
	char_u		**target_dir)
{
    int		status = FAIL;
    int_u	save_qfid = qf_get_curlist(qi)->qf_id;
    time_t	seconds = 0;
    char_u	*fname;
    int		fi;
    buf_T	*buf;
    int		duplicate_name = FALSE;
    int		using_dummy;
    char_u	*dirname_start = NULL;
    char_u	*dirname_now = NULL;
    int		found_match;
    aco_save_T	aco;

    dirname_start = alloc_id(MAXPATHL, aid_qf_dirname_start);
    dirname_now = alloc_id(MAXPATHL, aid_qf_dirname_now);
    if (dirname_start == NULL || dirname_now == NULL)
	goto theend;

    // Remember the current directory, because a BufRead autocommand that does
    // ":lcd %:p:h" changes the meaning of short path names.
    mch_dirname(dirname_start, MAXPATHL);

    seconds = (time_t)0;
    for (fi = 0; fi < cmd_args->fcount && !got_int && cmd_args->tomatch > 0;
									++fi)
    {
	fname = shorten_fname1(cmd_args->fnames[fi]);
	if (time(NULL) > seconds)
	{
	    // Display the file name every second or so, show the user we are
	    // working on it.
	    seconds = time(NULL);
	    vgr_display_fname(fname);
	}

	buf = buflist_findname_exp(cmd_args->fnames[fi]);
	if (buf == NULL || buf->b_ml.ml_mfp == NULL)
	{
	    // Remember that a buffer with this name already exists.
	    duplicate_name = (buf != NULL);
	    using_dummy = TRUE;
	    *redraw_for_dummy = TRUE;

	    buf = vgr_load_dummy_buf(fname, dirname_start, dirname_now);
	}
	else
	    // Use existing, loaded buffer.
	    using_dummy = FALSE;

	// Check whether the quickfix list is still valid. When loading a
	// buffer above, autocommands might have changed the quickfix list.
	if (!vgr_qflist_valid(wp, qi, save_qfid, cmd_args->qf_title))
	    goto theend;

	save_qfid = qf_get_curlist(qi)->qf_id;

	if (buf == NULL)
	{
	    if (!got_int)
		smsg(_("Cannot open file \"%s\""), fname);
	}
	else
	{
	    // Try for a match in all lines of the buffer.
	    // For ":1vimgrep" look for first match only.
	    found_match = vgr_match_buflines(qf_get_curlist(qi),
		    fname, buf, cmd_args->spat, &cmd_args->regmatch,
		    &cmd_args->tomatch, duplicate_name, cmd_args->flags);

	    if (using_dummy)
	    {
		if (found_match && *first_match_buf == NULL)
		    *first_match_buf = buf;
		if (duplicate_name)
		{
		    // Never keep a dummy buffer if there is another buffer
		    // with the same name.
		    wipe_dummy_buffer(buf, dirname_start);
		    buf = NULL;
		}
		else if ((cmdmod.cmod_flags & CMOD_HIDE) == 0
			    || buf->b_p_bh[0] == 'u'	// "unload"
			    || buf->b_p_bh[0] == 'w'	// "wipe"
			    || buf->b_p_bh[0] == 'd')	// "delete"
		{
		    // When no match was found we don't need to remember the
		    // buffer, wipe it out.  If there was a match and it
		    // wasn't the first one or we won't jump there: only
		    // unload the buffer.
		    // Ignore 'hidden' here, because it may lead to having too
		    // many swap files.
		    if (!found_match)
		    {
			wipe_dummy_buffer(buf, dirname_start);
			buf = NULL;
		    }
		    else if (buf != *first_match_buf
					|| (cmd_args->flags & VGR_NOJUMP)
					|| existing_swapfile(buf))
		    {
			unload_dummy_buffer(buf, dirname_start);
			// Keeping the buffer, remove the dummy flag.
			buf->b_flags &= ~BF_DUMMY;
			buf = NULL;
		    }
		}

		if (buf != NULL)
		{
		    // Keeping the buffer, remove the dummy flag.
		    buf->b_flags &= ~BF_DUMMY;

		    // If the buffer is still loaded we need to use the
		    // directory we jumped to below.
		    if (buf == *first_match_buf
			    && *target_dir == NULL
			    && STRCMP(dirname_start, dirname_now) != 0)
			*target_dir = vim_strsave(dirname_now);

		    // The buffer is still loaded, the Filetype autocommands
		    // need to be done now, in that buffer.  And the modelines
		    // need to be done (again).  But not the window-local
		    // options!
		    aucmd_prepbuf(&aco, buf);
#if defined(FEAT_SYN_HL)
		    apply_autocmds(EVENT_FILETYPE, buf->b_p_ft,
						     buf->b_fname, TRUE, buf);
#endif
		    do_modelines(OPT_NOWIN);
		    aucmd_restbuf(&aco);
		}
	    }
	}
    }

    status = OK;

theend:
    vim_free(dirname_now);
    vim_free(dirname_start);
    return status;
}


qf_winid(qf_info_T *qi)
{
    win_T	*win;

    // The quickfix window can be opened even if the quickfix list is not set
    // using ":copen". This is not true for location lists.
    if (qi == NULL)
	return 0;
    win = qf_find_win(qi);
    if (win != NULL)
	return win->w_id;
    return 0;
}


get_nth_entry(qf_list_T *qfl, int errornr, int *new_qfidx)
{
    qfline_T	*qf_ptr = qfl->qf_ptr;
    int		qf_idx = qfl->qf_index;

    // New error number is less than the current error number
    while (errornr < qf_idx && qf_idx > 1 && qf_ptr->qf_prev != NULL)
    {
	--qf_idx;
	qf_ptr = qf_ptr->qf_prev;
    }
    // New error number is greater than the current error number
    while (errornr > qf_idx && qf_idx < qfl->qf_count &&
						qf_ptr->qf_next != NULL)
    {
	++qf_idx;
	qf_ptr = qf_ptr->qf_next;
    }

    *new_qfidx = qf_idx;
    return qf_ptr;
}


qf_find_buf(qf_info_T *qi)
{
    tabpage_T	*tp;
    win_T	*win;

    if (qi->qf_bufnr != INVALID_QFBUFNR)
    {
	buf_T	*qfbuf;
	qfbuf = buflist_findnr(qi->qf_bufnr);
	if (qfbuf != NULL)
	    return qfbuf;
	// buffer is no longer present
	qi->qf_bufnr = INVALID_QFBUFNR;
    }

    FOR_ALL_TAB_WINDOWS(tp, win)
	if (is_qf_win(win, qi))
	    return win->w_buffer;

    return NULL;
}


cexpr_get_auname(cmdidx_T cmdidx)
{
    switch (cmdidx)
    {
	case CMD_cexpr:	    return (char_u *)"cexpr";
	case CMD_cgetexpr:  return (char_u *)"cgetexpr";
	case CMD_caddexpr:  return (char_u *)"caddexpr";
	case CMD_lexpr:	    return (char_u *)"lexpr";
	case CMD_lgetexpr:  return (char_u *)"lgetexpr";
	case CMD_laddexpr:  return (char_u *)"laddexpr";
	default:	    return NULL;
    }
}


qf_grow_linebuf(qfstate_T *state, int newsz)
{
    char_u	*p;

    // If the line exceeds LINE_MAXLEN exclude the last
    // byte since it's not a NL character.
    state->linelen = newsz > LINE_MAXLEN ? LINE_MAXLEN - 1 : newsz;
    if (state->growbuf == NULL)
    {
	state->growbuf = alloc_id(state->linelen + 1, aid_qf_linebuf);
	if (state->growbuf == NULL)
	    return NULL;
	state->growbufsiz = state->linelen;
    }
    else if (state->linelen > state->growbufsiz)
    {
	if ((p = vim_realloc(state->growbuf, state->linelen + 1)) == NULL)
	    return NULL;
	state->growbuf = p;
	state->growbufsiz = state->linelen;
    }
    return state->growbuf;
}


qflist_valid(win_T *wp, int_u qf_id)
{
    qf_info_T	*qi = &ql_info;
    int		i;

    if (wp != NULL)
    {
	if (!win_valid(wp))
	    return FALSE;
	qi = GET_LOC_LIST(wp);	    // Location list
	if (qi == NULL)
	    return FALSE;
    }

    for (i = 0; i < qi->qf_listcount; ++i)
	if (qi->qf_lists[i].qf_id == qf_id)
	    return TRUE;

    return FALSE;
}


qf_jump_to_usable_window(int qf_fnum, int newwin, int *opened_window)
{
    win_T	*usable_wp = NULL;
    int		usable_win = FALSE;
    qf_info_T	*ll_ref = NULL;

    // If opening a new window, then don't use the location list referred by
    // the current window.  Otherwise two windows will refer to the same
    // location list.
    if (!newwin)
	ll_ref = curwin->w_llist_ref;

    if (ll_ref != NULL)
    {
	// Find a non-quickfix window with this location list
	usable_wp = qf_find_win_with_loclist(ll_ref);
	if (usable_wp != NULL)
	    usable_win = TRUE;
    }

    if (!usable_win)
    {
	// Locate a window showing a normal buffer
	win_T	*win = qf_find_win_with_normal_buf();
	if (win != NULL)
	    usable_win = TRUE;
    }

    // If no usable window is found and 'switchbuf' contains "usetab"
    // then search in other tabs.
    if (!usable_win && (swb_flags & SWB_USETAB))
	usable_win = qf_goto_tabwin_with_file(qf_fnum);

    // If there is only one window and it is the quickfix window, create a
    // new one above the quickfix window.
    if ((ONE_WINDOW && bt_quickfix(curbuf)) || !usable_win || newwin)
    {
	if (qf_open_new_file_win(ll_ref) != OK)
	    return FAIL;
	*opened_window = TRUE;	// close it when fail
    }
    else
    {
	if (curwin->w_llist_ref != NULL)	// In a location window
	    qf_goto_win_with_ll_file(usable_wp, qf_fnum, ll_ref);
	else					// In a quickfix window
	    qf_goto_win_with_qfl_file(qf_fnum);
    }

    return OK;
}


qf_parse_get_fields(
	char_u		*linebuf,
	int		linelen,
	efm_T		*fmt_ptr,
	qffields_T	*fields,
	int		qf_multiline,
	int		qf_multiscan,
	char_u		**tail)
{
    regmatch_T	regmatch;
    int		status = QF_FAIL;
    int		r;

    if (qf_multiscan &&
		vim_strchr((char_u *)"OPQ", fmt_ptr->prefix) == NULL)
	return QF_FAIL;

    fields->namebuf[0] = NUL;
    fields->module[0] = NUL;
    fields->pattern[0] = NUL;
    if (!qf_multiscan)
	fields->errmsg[0] = NUL;
    fields->lnum = 0;
    fields->end_lnum = 0;
    fields->col = 0;
    fields->end_col = 0;
    fields->use_viscol = FALSE;
    fields->enr = -1;
    fields->type = 0;
    *tail = NULL;

    // Always ignore case when looking for a matching error.
    regmatch.rm_ic = TRUE;
    regmatch.regprog = fmt_ptr->prog;
    r = vim_regexec(&regmatch, linebuf, (colnr_T)0);
    fmt_ptr->prog = regmatch.regprog;
    if (r)
	status = qf_parse_match(linebuf, linelen, fmt_ptr, &regmatch,
		fields, qf_multiline, qf_multiscan, tail);

    return status;
}


qf_get_next_buf_line(qfstate_T *state)
{
    char_u	*p_buf = NULL;
    int		len;

    // Get the next line from the supplied buffer
    if (state->buflnum > state->lnumlast)
	return QF_END_OF_INPUT;

    p_buf = ml_get_buf(state->buf, state->buflnum, FALSE);
    state->buflnum += 1;

    len = (int)STRLEN(p_buf);
    if (len > IOSIZE - 2)
    {
	state->linebuf = qf_grow_linebuf(state, len);
	if (state->linebuf == NULL)
	    return QF_NOMEM;
    }
    else
    {
	state->linebuf = IObuff;
	state->linelen = len;
    }
    vim_strncpy(state->linebuf, p_buf, state->linelen);

    return QF_OK;
}


copy_loclist_entries(qf_list_T *from_qfl, qf_list_T *to_qfl)
{
    int		i;
    qfline_T    *from_qfp;
    qfline_T    *prevp;

    // copy all the location entries in this list
    FOR_ALL_QFL_ITEMS(from_qfl, from_qfp, i)
    {
	if (qf_add_entry(to_qfl,
		    NULL,
		    NULL,
		    from_qfp->qf_module,
		    0,
		    from_qfp->qf_text,
		    from_qfp->qf_lnum,
		    from_qfp->qf_end_lnum,
		    from_qfp->qf_col,
		    from_qfp->qf_end_col,
		    from_qfp->qf_viscol,
		    from_qfp->qf_pattern,
		    from_qfp->qf_nr,
		    0,
		    from_qfp->qf_valid) == QF_FAIL)
	    return FAIL;

	// qf_add_entry() will not set the qf_num field, as the
	// directory and file names are not supplied. So the qf_fnum
	// field is copied here.
	prevp = to_qfl->qf_last;
	prevp->qf_fnum = from_qfp->qf_fnum;	// file number
	prevp->qf_type = from_qfp->qf_type;	// error type
	if (from_qfl->qf_ptr == from_qfp)
	    to_qfl->qf_ptr = prevp;		// current location
    }

    return OK;
}


hgr_search_file(
	qf_list_T *qfl,
	char_u *fname,
	vimconv_T *p_vc,
	regmatch_T *p_regmatch)
{
    FILE	*fd;
    long	lnum;

    fd = mch_fopen((char *)fname, "r");
    if (fd == NULL)
	return;

    lnum = 1;
    while (!vim_fgets(IObuff, IOSIZE, fd) && !got_int)
    {
	char_u    *line = IObuff;

	// Convert a line if 'encoding' is not utf-8 and
	// the line contains a non-ASCII character.
	if (p_vc->vc_type != CONV_NONE && has_non_ascii(IObuff))
	{
	    line = string_convert(p_vc, IObuff, NULL);
	    if (line == NULL)
		line = IObuff;
	}

	if (vim_regexec(p_regmatch, line, (colnr_T)0))
	{
	    int	l = (int)STRLEN(line);

	    // remove trailing CR, LF, spaces, etc.
	    while (l > 0 && line[l - 1] <= ' ')
		line[--l] = NUL;

	    if (qf_add_entry(qfl,
			NULL,	// dir
			fname,
			NULL,
			0,
			line,
			lnum,
			0,
			(int)(p_regmatch->startp[0] - line)
			+ 1,	// col
			(int)(p_regmatch->endp[0] - line)
			+ 1,	// end_col
			FALSE,	// vis_col
			NULL,	// search pattern
			0,	// nr
			1,	// type
			TRUE	// valid
			) == QF_FAIL)
	    {
		got_int = TRUE;
		if (line != IObuff)
		    vim_free(line);
		break;
	    }
	}
	if (line != IObuff)
	    vim_free(line);
	++lnum;
	line_breakcheck();
    }
    fclose(fd);
}


f_getloclist(typval_T *argvars UNUSED, typval_T *rettv UNUSED)
{
# ifdef FEAT_QUICKFIX
    win_T	*wp;

    if (in_vim9script()
	    && (check_for_number_arg(argvars, 0) == FAIL
		|| check_for_opt_dict_arg(argvars, 1) == FAIL))
	return;

    wp = find_win_by_nr_or_id(&argvars[0]);
    get_qf_loc_list(FALSE, wp, &argvars[1], rettv);
# endif
}


qf_list_entry(qfline_T *qfp, int qf_idx, int cursel)
{
    char_u	*fname;
    buf_T	*buf;
    int		filter_entry;

    fname = NULL;
    if (qfp->qf_module != NULL && *qfp->qf_module != NUL)
	vim_snprintf((char *)IObuff, IOSIZE, "%2d %s", qf_idx,
						(char *)qfp->qf_module);
    else {
	if (qfp->qf_fnum != 0
		&& (buf = buflist_findnr(qfp->qf_fnum)) != NULL)
	{
	    fname = buf->b_fname;
	    if (qfp->qf_type == 1)	// :helpgrep
		fname = gettail(fname);
	}
	if (fname == NULL)
	    sprintf((char *)IObuff, "%2d", qf_idx);
	else
	    vim_snprintf((char *)IObuff, IOSIZE, "%2d %s",
		    qf_idx, (char *)fname);
    }

    // Support for filtering entries using :filter /pat/ clist
    // Match against the module name, file name, search pattern and
    // text of the entry.
    filter_entry = TRUE;
    if (qfp->qf_module != NULL && *qfp->qf_module != NUL)
	filter_entry &= message_filtered(qfp->qf_module);
    if (filter_entry && fname != NULL)
	filter_entry &= message_filtered(fname);
    if (filter_entry && qfp->qf_pattern != NULL)
	filter_entry &= message_filtered(qfp->qf_pattern);
    if (filter_entry)
	filter_entry &= message_filtered(qfp->qf_text);
    if (filter_entry)
	return;

    msg_putchar('\n');
    msg_outtrans_attr(IObuff, cursel ? HL_ATTR(HLF_QFL) : qfFileAttr);

    if (qfp->qf_lnum != 0)
	msg_puts_attr(":", qfSepAttr);
    if (qfp->qf_lnum == 0)
	IObuff[0] = NUL;
    else
	qf_range_text(qfp, IObuff, IOSIZE);
    sprintf((char *)IObuff + STRLEN(IObuff), "%s",
	    (char *)qf_types(qfp->qf_type, qfp->qf_nr));
    msg_puts_attr((char *)IObuff, qfLineAttr);
    msg_puts_attr(":", qfSepAttr);
    if (qfp->qf_pattern != NULL)
    {
	qf_fmt_text(qfp->qf_pattern, IObuff, IOSIZE);
	msg_puts((char *)IObuff);
	msg_puts_attr(":", qfSepAttr);
    }
    msg_puts(" ");

    {
	char_u *tbuf = IObuff;
	size_t	tbuflen = IOSIZE;
	size_t	len = STRLEN(qfp->qf_text) + 3;

	if (len > IOSIZE)
	{
	    tbuf = alloc(len);
	    if (tbuf != NULL)
		tbuflen = len;
	    else
		tbuf = IObuff;
	}

	// Remove newlines and leading whitespace from the text.  For an
	// unrecognized line keep the indent, the compiler may mark a word
	// with ^^^^.
	qf_fmt_text((fname != NULL || qfp->qf_lnum != 0)
				    ? skipwhite(qfp->qf_text) : qfp->qf_text,
				    tbuf, (int)tbuflen);
	msg_prt_line(tbuf, FALSE);

	if (tbuf != IObuff)
	    vim_free(tbuf);
    }
    out_flush();		// show one line at a time
}


qf_list(exarg_T *eap)
{
    qf_list_T	*qfl;
    qfline_T	*qfp;
    int		i;
    int		idx1 = 1;
    int		idx2 = -1;
    char_u	*arg = eap->arg;
    int		plus = FALSE;
    int		all = eap->forceit;	// if not :cl!, only show
					// recognised errors
    qf_info_T	*qi;

    if ((qi = qf_cmd_get_stack(eap, TRUE)) == NULL)
	return;

    if (qf_stack_empty(qi) || qf_list_empty(qf_get_curlist(qi)))
    {
	emsg(_(e_no_errors));
	return;
    }
    if (*arg == '+')
    {
	++arg;
	plus = TRUE;
    }
    if (!get_list_range(&arg, &idx1, &idx2) || *arg != NUL)
    {
	semsg(_(e_trailing_characters_str), arg);
	return;
    }
    qfl = qf_get_curlist(qi);
    if (plus)
    {
	i = qfl->qf_index;
	idx2 = i + idx1;
	idx1 = i;
    }
    else
    {
	i = qfl->qf_count;
	if (idx1 < 0)
	    idx1 = (-idx1 > i) ? 0 : idx1 + i + 1;
	if (idx2 < 0)
	    idx2 = (-idx2 > i) ? 0 : idx2 + i + 1;
    }

    // Shorten all the file names, so that it is easy to read
    shorten_fnames(FALSE);

    // Get the attributes for the different quickfix highlight items.  Note
    // that this depends on syntax items defined in the qf.vim syntax file
    qfFileAttr = syn_name2attr((char_u *)"qfFileName");
    if (qfFileAttr == 0)
	qfFileAttr = HL_ATTR(HLF_D);
    qfSepAttr = syn_name2attr((char_u *)"qfSeparator");
    if (qfSepAttr == 0)
	qfSepAttr = HL_ATTR(HLF_D);
    qfLineAttr = syn_name2attr((char_u *)"qfLineNr");
    if (qfLineAttr == 0)
	qfLineAttr = HL_ATTR(HLF_N);

    if (qfl->qf_nonevalid)
	all = TRUE;
    FOR_ALL_QFL_ITEMS(qfl, qfp, i)
    {
	if ((qfp->qf_valid || all) && idx1 <= i && i <= idx2)
	    qf_list_entry(qfp, i, i == qfl->qf_index);

	ui_breakcheck();
    }
}


qf_parse_fmt_r(regmatch_T *rmp, int midx, char_u **tail)
{
    if (rmp->startp[midx] == NULL)
	return QF_FAIL;
    *tail = rmp->startp[midx];
    return QF_OK;
}


vgr_init_regmatch(regmmatch_T *regmatch, char_u *s)
{
    // Get the search pattern: either white-separated or enclosed in //
    regmatch->regprog = NULL;

    if (s == NULL || *s == NUL)
    {
	// Pattern is empty, use last search pattern.
	if (last_search_pat() == NULL)
	{
	    emsg(_(e_no_previous_regular_expression));
	    return;
	}
	regmatch->regprog = vim_regcomp(last_search_pat(), RE_MAGIC);
    }
    else
	regmatch->regprog = vim_regcomp(s, RE_MAGIC);

    regmatch->rmm_ic = p_ic;
    regmatch->rmm_maxcol = 0;
}


qf_cmdtitle(char_u *cmd)
{
    static char_u qftitle_str[IOSIZE];

    vim_snprintf((char *)qftitle_str, IOSIZE, ":%s", (char *)cmd);
    return qftitle_str;
}


qf_setprop_items(qf_info_T *qi, int qf_idx, dictitem_T *di, int action)
{
    int		retval = FAIL;
    char_u	*title_save;

    if (di->di_tv.v_type != VAR_LIST)
	return FAIL;

    title_save = vim_strsave(qi->qf_lists[qf_idx].qf_title);
    retval = qf_add_entries(qi, qf_idx, di->di_tv.vval.v_list,
	    title_save, action == ' ' ? 'a' : action);
    vim_free(title_save);

    return retval;
}


get_next_valid_entry(
	qf_list_T	*qfl,
	qfline_T	*qf_ptr,
	int		*qf_index,
	int		dir)
{
    int			idx;
    int			old_qf_fnum;

    idx = *qf_index;
    old_qf_fnum = qf_ptr->qf_fnum;

    do
    {
	if (idx == qfl->qf_count || qf_ptr->qf_next == NULL)
	    return NULL;
	++idx;
	qf_ptr = qf_ptr->qf_next;
    } while ((!qfl->qf_nonevalid && !qf_ptr->qf_valid)
	    || (dir == FORWARD_FILE && qf_ptr->qf_fnum == old_qf_fnum));

    *qf_index = idx;
    return qf_ptr;
}


cfile_get_auname(cmdidx_T cmdidx)
{
    switch (cmdidx)
    {
	case CMD_cfile:	    return (char_u *)"cfile";
	case CMD_cgetfile:  return (char_u *)"cgetfile";
	case CMD_caddfile:  return (char_u *)"caddfile";
	case CMD_lfile:	    return (char_u *)"lfile";
	case CMD_lgetfile:  return (char_u *)"lgetfile";
	case CMD_laddfile:  return (char_u *)"laddfile";
	default:	    return NULL;
    }
}


qf_find_last_entry_on_line(qfline_T *entry, int *errornr)
{
    while (!got_int &&
	    entry->qf_next != NULL
	    && entry->qf_fnum == entry->qf_next->qf_fnum
	    && entry->qf_lnum == entry->qf_next->qf_lnum)
    {
	entry = entry->qf_next;
	++*errornr;
    }

    return entry;
}


set_errorlist(
	win_T	*wp,
	list_T	*list,
	int	action,
	char_u	*title,
	dict_T	*what)
{
    qf_info_T	*qi = &ql_info;
    int		retval = OK;

    if (wp != NULL)
    {
	qi = ll_get_or_alloc_list(wp);
	if (qi == NULL)
	    return FAIL;
    }

    if (action == 'f')
    {
	// Free the entire quickfix or location list stack
	qf_free_stack(wp, qi);
	return OK;
    }

    // A dict argument cannot be specified with a non-empty list argument
    if (list->lv_len != 0 && what != NULL)
    {
	semsg(_(e_invalid_argument_str),
			 _("cannot have both a list and a \"what\" argument"));
	return FAIL;
    }

    incr_quickfix_busy();

    if (what != NULL)
	retval = qf_set_properties(qi, what, action, title);
    else
    {
	retval = qf_add_entries(qi, qi->qf_curlist, list, title, action);
	if (retval == OK)
	    qf_list_changed(qf_get_curlist(qi));
    }

    decr_quickfix_busy();

    return retval;
}


qf_parse_dir_pfx(int idx, qffields_T *fields, qf_list_T *qfl)
{
    if (idx == 'D')				// enter directory
    {
	if (*fields->namebuf == NUL)
	{
	    emsg(_(e_missing_or_empty_directory_name));
	    return QF_FAIL;
	}
	qfl->qf_directory =
	    qf_push_dir(fields->namebuf, &qfl->qf_dir_stack, FALSE);
	if (qfl->qf_directory == NULL)
	    return QF_FAIL;
    }
    else if (idx == 'X')			// leave directory
	qfl->qf_directory = qf_pop_dir(&qfl->qf_dir_stack);

    return QF_OK;
}


qf_init_process_nextline(
	qf_list_T	*qfl,
	efm_T		*fmt_first,
	qfstate_T	*state,
	qffields_T	*fields)
{
    int		    status;

    // Get the next line from a file/buffer/list/string
    status = qf_get_nextline(state);
    if (status != QF_OK)
	return status;

    status = qf_parse_line(qfl, state->linebuf, state->linelen,
	    fmt_first, fields);
    if (status != QF_OK)
	return status;

    return qf_add_entry(qfl,
		qfl->qf_directory,
		(*fields->namebuf || qfl->qf_directory != NULL)
		? fields->namebuf
		: ((qfl->qf_currfile != NULL && fields->valid)
		    ? qfl->qf_currfile : (char_u *)NULL),
		fields->module,
		0,
		fields->errmsg,
		fields->lnum,
		fields->end_lnum,
		fields->col,
		fields->end_col,
		fields->use_viscol,
		fields->pattern,
		fields->enr,
		fields->type,
		fields->valid);
}