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[MacVim.git] / src / buffer.c

/* vi:set ts=8 sts=4 sw=4:
 *
 * VIM - Vi IMproved    by Bram Moolenaar
 *
 * Do ":help uganda"  in Vim to read copying and usage conditions.
 * Do ":help credits" in Vim to see a list of people who contributed.
 * See README.txt for an overview of the Vim source code.
 */

/*
 * buffer.c: functions for dealing with the buffer structure
 */

/*
 * The buffer list is a double linked list of all buffers.
 * Each buffer can be in one of these states:
 * never loaded: BF_NEVERLOADED is set, only the file name is valid
 *   not loaded: b_ml.ml_mfp == NULL, no memfile allocated
 *       hidden: b_nwindows == 0, loaded but not displayed in a window
 *       normal: loaded and displayed in a window
 *
 * Instead of storing file names all over the place, each file name is
 * stored in the buffer list. It can be referenced by a number.
 *
 * The current implementation remembers all file names ever used.
 */

#include "vim.h"

#if defined(FEAT_CMDL_COMPL) || defined(FEAT_LISTCMDS) || defined(FEAT_EVAL) || defined(FEAT_PERL)
static char_u   *buflist_match __ARGS((regprog_T *prog, buf_T *buf));
# define HAVE_BUFLIST_MATCH
static char_u   *fname_match __ARGS((regprog_T *prog, char_u *name));
#endif
static void     buflist_setfpos __ARGS((buf_T *buf, win_T *win, linenr_T lnum, colnr_T col, int copy_options));
static wininfo_T *find_wininfo __ARGS((buf_T *buf));
#ifdef UNIX
static buf_T    *buflist_findname_stat __ARGS((char_u *ffname, struct stat *st));
static int      otherfile_buf __ARGS((buf_T *buf, char_u *ffname, struct stat *stp));
static int      buf_same_ino __ARGS((buf_T *buf, struct stat *stp));
#else
static int      otherfile_buf __ARGS((buf_T *buf, char_u *ffname));
#endif
#ifdef FEAT_TITLE
static int      ti_change __ARGS((char_u *str, char_u **last));
#endif
static void     free_buffer __ARGS((buf_T *));
static void     free_buffer_stuff __ARGS((buf_T *buf, int free_options));
static void     clear_wininfo __ARGS((buf_T *buf));

#ifdef UNIX
# define dev_T dev_t
#else
# define dev_T unsigned
#endif

#if defined(FEAT_SIGNS)
static void insert_sign __ARGS((buf_T *buf, signlist_T *prev, signlist_T *next, int id, linenr_T lnum, int typenr));
static void buf_delete_signs __ARGS((buf_T *buf));
#endif

/*
 * Open current buffer, that is: open the memfile and read the file into memory
 * return FAIL for failure, OK otherwise
 */
    int
open_buffer(read_stdin, eap)
    int         read_stdin;         /* read file from stdin */
    exarg_T     *eap;               /* for forced 'ff' and 'fenc' or NULL */
{
    int         retval = OK;
#ifdef FEAT_AUTOCMD
    buf_T       *old_curbuf;
#endif

    /*
     * The 'readonly' flag is only set when BF_NEVERLOADED is being reset.
     * When re-entering the same buffer, it should not change, because the
     * user may have reset the flag by hand.
     */
    if (readonlymode && curbuf->b_ffname != NULL
                                        && (curbuf->b_flags & BF_NEVERLOADED))
        curbuf->b_p_ro = TRUE;

    if (ml_open(curbuf) == FAIL)
    {
        /*
         * There MUST be a memfile, otherwise we can't do anything
         * If we can't create one for the current buffer, take another buffer
         */
        close_buffer(NULL, curbuf, 0);
        for (curbuf = firstbuf; curbuf != NULL; curbuf = curbuf->b_next)
            if (curbuf->b_ml.ml_mfp != NULL)
                break;
        /*
         * if there is no memfile at all, exit
         * This is OK, since there are no changes to lose.
         */
        if (curbuf == NULL)
        {
            EMSG(_("E82: Cannot allocate any buffer, exiting..."));
            getout(2);
        }
        EMSG(_("E83: Cannot allocate buffer, using other one..."));
        enter_buffer(curbuf);
        return FAIL;
    }

#ifdef FEAT_AUTOCMD
    /* The autocommands in readfile() may change the buffer, but only AFTER
     * reading the file. */
    old_curbuf = curbuf;
    modified_was_set = FALSE;
#endif

    /* mark cursor position as being invalid */
    changed_line_abv_curs();

    if (curbuf->b_ffname != NULL
#ifdef FEAT_NETBEANS_INTG
            && netbeansReadFile
#endif
       )
    {
#ifdef FEAT_NETBEANS_INTG
        int oldFire = netbeansFireChanges;

        netbeansFireChanges = 0;
#endif
        retval = readfile(curbuf->b_ffname, curbuf->b_fname,
                  (linenr_T)0, (linenr_T)0, (linenr_T)MAXLNUM, eap, READ_NEW);
#ifdef FEAT_NETBEANS_INTG
        netbeansFireChanges = oldFire;
#endif
        /* Help buffer is filtered. */
        if (curbuf->b_help)
            fix_help_buffer();
    }
    else if (read_stdin)
    {
        int             save_bin = curbuf->b_p_bin;
        linenr_T        line_count;

        /*
         * First read the text in binary mode into the buffer.
         * Then read from that same buffer and append at the end.  This makes
         * it possible to retry when 'fileformat' or 'fileencoding' was
         * guessed wrong.
         */
        curbuf->b_p_bin = TRUE;
        retval = readfile(NULL, NULL, (linenr_T)0,
                  (linenr_T)0, (linenr_T)MAXLNUM, NULL, READ_NEW + READ_STDIN);
        curbuf->b_p_bin = save_bin;
        if (retval == OK)
        {
            line_count = curbuf->b_ml.ml_line_count;
            retval = readfile(NULL, NULL, (linenr_T)line_count,
                            (linenr_T)0, (linenr_T)MAXLNUM, eap, READ_BUFFER);
            if (retval == OK)
            {
                /* Delete the binary lines. */
                while (--line_count >= 0)
                    ml_delete((linenr_T)1, FALSE);
            }
            else
            {
                /* Delete the converted lines. */
                while (curbuf->b_ml.ml_line_count > line_count)
                    ml_delete(line_count, FALSE);
            }
            /* Put the cursor on the first line. */
            curwin->w_cursor.lnum = 1;
            curwin->w_cursor.col = 0;

            /* Set or reset 'modified' before executing autocommands, so that
             * it can be changed there. */
            if (!readonlymode && !bufempty())
                changed();
            else if (retval != FAIL)
                unchanged(curbuf, FALSE);
#ifdef FEAT_AUTOCMD
# ifdef FEAT_EVAL
            apply_autocmds_retval(EVENT_STDINREADPOST, NULL, NULL, FALSE,
                                                        curbuf, &retval);
# else
            apply_autocmds(EVENT_STDINREADPOST, NULL, NULL, FALSE, curbuf);
# endif
#endif
        }
    }

    /* if first time loading this buffer, init b_chartab[] */
    if (curbuf->b_flags & BF_NEVERLOADED)
        (void)buf_init_chartab(curbuf, FALSE);

    /*
     * Set/reset the Changed flag first, autocmds may change the buffer.
     * Apply the automatic commands, before processing the modelines.
     * So the modelines have priority over auto commands.
     */
    /* When reading stdin, the buffer contents always needs writing, so set
     * the changed flag.  Unless in readonly mode: "ls | gview -".
     * When interrupted and 'cpoptions' contains 'i' set changed flag. */
    if ((got_int && vim_strchr(p_cpo, CPO_INTMOD) != NULL)
#ifdef FEAT_AUTOCMD
                || modified_was_set     /* ":set modified" used in autocmd */
# ifdef FEAT_EVAL
                || (aborting() && vim_strchr(p_cpo, CPO_INTMOD) != NULL)
# endif
#endif
       )
        changed();
    else if (retval != FAIL && !read_stdin)
        unchanged(curbuf, FALSE);
    save_file_ff(curbuf);               /* keep this fileformat */

    /* require "!" to overwrite the file, because it wasn't read completely */
#ifdef FEAT_EVAL
    if (aborting())
#else
    if (got_int)
#endif
        curbuf->b_flags |= BF_READERR;

#ifdef FEAT_FOLDING
    /* Need to update automatic folding.  Do this before the autocommands,
     * they may use the fold info. */
    foldUpdateAll(curwin);
#endif

#ifdef FEAT_AUTOCMD
    /* need to set w_topline, unless some autocommand already did that. */
    if (!(curwin->w_valid & VALID_TOPLINE))
    {
        curwin->w_topline = 1;
# ifdef FEAT_DIFF
        curwin->w_topfill = 0;
# endif
    }
# ifdef FEAT_EVAL
    apply_autocmds_retval(EVENT_BUFENTER, NULL, NULL, FALSE, curbuf, &retval);
# else
    apply_autocmds(EVENT_BUFENTER, NULL, NULL, FALSE, curbuf);
# endif
#endif

    if (retval != FAIL)
    {
#ifdef FEAT_AUTOCMD
        /*
         * The autocommands may have changed the current buffer.  Apply the
         * modelines to the correct buffer, if it still exists and is loaded.
         */
        if (buf_valid(old_curbuf) && old_curbuf->b_ml.ml_mfp != NULL)
        {
            aco_save_T  aco;

            /* Go to the buffer that was opened. */
            aucmd_prepbuf(&aco, old_curbuf);
#endif
            do_modelines(0);
            curbuf->b_flags &= ~(BF_CHECK_RO | BF_NEVERLOADED);

#ifdef FEAT_AUTOCMD
# ifdef FEAT_EVAL
            apply_autocmds_retval(EVENT_BUFWINENTER, NULL, NULL, FALSE, curbuf,
                                                                    &retval);
# else
            apply_autocmds(EVENT_BUFWINENTER, NULL, NULL, FALSE, curbuf);
# endif

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

    return retval;
}

/*
 * Return TRUE if "buf" points to a valid buffer (in the buffer list).
 */
    int
buf_valid(buf)
    buf_T       *buf;
{
    buf_T       *bp;

    for (bp = firstbuf; bp != NULL; bp = bp->b_next)
        if (bp == buf)
            return TRUE;
    return FALSE;
}

/*
 * Close the link to a buffer.
 * "action" is used when there is no longer a window for the buffer.
 * It can be:
 * 0                    buffer becomes hidden
 * DOBUF_UNLOAD         buffer is unloaded
 * DOBUF_DELETE         buffer is unloaded and removed from buffer list
 * DOBUF_WIPE           buffer is unloaded and really deleted
 * When doing all but the first one on the current buffer, the caller should
 * get a new buffer very soon!
 *
 * The 'bufhidden' option can force freeing and deleting.
 */
    void
close_buffer(win, buf, action)
    win_T       *win;           /* if not NULL, set b_last_cursor */
    buf_T       *buf;
    int         action;
{
#ifdef FEAT_AUTOCMD
    int         is_curbuf;
    int         nwindows = buf->b_nwindows;
#endif
    int         unload_buf = (action != 0);
    int         del_buf = (action == DOBUF_DEL || action == DOBUF_WIPE);
    int         wipe_buf = (action == DOBUF_WIPE);

#ifdef FEAT_QUICKFIX
    /*
     * Force unloading or deleting when 'bufhidden' says so.
     * The caller must take care of NOT deleting/freeing when 'bufhidden' is
     * "hide" (otherwise we could never free or delete a buffer).
     */
    if (buf->b_p_bh[0] == 'd')          /* 'bufhidden' == "delete" */
    {
        del_buf = TRUE;
        unload_buf = TRUE;
    }
    else if (buf->b_p_bh[0] == 'w')     /* 'bufhidden' == "wipe" */
    {
        del_buf = TRUE;
        unload_buf = TRUE;
        wipe_buf = TRUE;
    }
    else if (buf->b_p_bh[0] == 'u')     /* 'bufhidden' == "unload" */
        unload_buf = TRUE;
#endif

    if (win != NULL)
    {
        /* Set b_last_cursor when closing the last window for the buffer.
         * Remember the last cursor position and window options of the buffer.
         * This used to be only for the current window, but then options like
         * 'foldmethod' may be lost with a ":only" command. */
        if (buf->b_nwindows == 1)
            set_last_cursor(win);
        buflist_setfpos(buf, win,
                    win->w_cursor.lnum == 1 ? 0 : win->w_cursor.lnum,
                    win->w_cursor.col, TRUE);
    }

#ifdef FEAT_AUTOCMD
    /* When the buffer is no longer in a window, trigger BufWinLeave */
    if (buf->b_nwindows == 1)
    {
        apply_autocmds(EVENT_BUFWINLEAVE, buf->b_fname, buf->b_fname,
                                                                  FALSE, buf);
        if (!buf_valid(buf))        /* autocommands may delete the buffer */
            return;

        /* When the buffer becomes hidden, but is not unloaded, trigger
         * BufHidden */
        if (!unload_buf)
        {
            apply_autocmds(EVENT_BUFHIDDEN, buf->b_fname, buf->b_fname,
                                                                  FALSE, buf);
            if (!buf_valid(buf))        /* autocmds may delete the buffer */
                return;
        }
# ifdef FEAT_EVAL
        if (aborting())     /* autocmds may abort script processing */
            return;
# endif
    }
    nwindows = buf->b_nwindows;
#endif

    /* decrease the link count from windows (unless not in any window) */
    if (buf->b_nwindows > 0)
        --buf->b_nwindows;

    /* Return when a window is displaying the buffer or when it's not
     * unloaded. */
    if (buf->b_nwindows > 0 || !unload_buf)
    {
#if 0       /* why was this here? */
        if (buf == curbuf)
            u_sync();       /* sync undo before going to another buffer */
#endif
        return;
    }

    /* Always remove the buffer when there is no file name. */
    if (buf->b_ffname == NULL)
        del_buf = TRUE;

    /*
     * Free all things allocated for this buffer.
     * Also calls the "BufDelete" autocommands when del_buf is TRUE.
     */
#ifdef FEAT_AUTOCMD
    /* Remember if we are closing the current buffer.  Restore the number of
     * windows, so that autocommands in buf_freeall() don't get confused. */
    is_curbuf = (buf == curbuf);
    buf->b_nwindows = nwindows;
#endif

    buf_freeall(buf, del_buf, wipe_buf);

#ifdef FEAT_AUTOCMD
    /* Autocommands may have deleted the buffer. */
    if (!buf_valid(buf))
        return;
# ifdef FEAT_EVAL
    if (aborting())         /* autocmds may abort script processing */
        return;
# endif

    /* Autocommands may have opened or closed windows for this buffer.
     * Decrement the count for the close we do here. */
    if (buf->b_nwindows > 0)
        --buf->b_nwindows;

    /*
     * It's possible that autocommands change curbuf to the one being deleted.
     * This might cause the previous curbuf to be deleted unexpectedly.  But
     * in some cases it's OK to delete the curbuf, because a new one is
     * obtained anyway.  Therefore only return if curbuf changed to the
     * deleted buffer.
     */
    if (buf == curbuf && !is_curbuf)
        return;
#endif

#ifdef FEAT_NETBEANS_INTG
    if (usingNetbeans)
        netbeans_file_closed(buf);
#endif
    /* Change directories when the 'acd' option is set. */
    DO_AUTOCHDIR

    /*
     * Remove the buffer from the list.
     */
    if (wipe_buf)
    {
#ifdef FEAT_SUN_WORKSHOP
        if (usingSunWorkShop)
            workshop_file_closed_lineno((char *)buf->b_ffname,
                        (int)buf->b_last_cursor.lnum);
#endif
        vim_free(buf->b_ffname);
        vim_free(buf->b_sfname);
        if (buf->b_prev == NULL)
            firstbuf = buf->b_next;
        else
            buf->b_prev->b_next = buf->b_next;
        if (buf->b_next == NULL)
            lastbuf = buf->b_prev;
        else
            buf->b_next->b_prev = buf->b_prev;
        free_buffer(buf);
    }
    else
    {
        if (del_buf)
        {
            /* Free all internal variables and reset option values, to make
             * ":bdel" compatible with Vim 5.7. */
            free_buffer_stuff(buf, TRUE);

            /* Make it look like a new buffer. */
            buf->b_flags = BF_CHECK_RO | BF_NEVERLOADED;

            /* Init the options when loaded again. */
            buf->b_p_initialized = FALSE;
        }
        buf_clear_file(buf);
        if (del_buf)
            buf->b_p_bl = FALSE;
    }
}

/*
 * Make buffer not contain a file.
 */
    void
buf_clear_file(buf)
    buf_T       *buf;
{
    buf->b_ml.ml_line_count = 1;
    unchanged(buf, TRUE);
#ifndef SHORT_FNAME
    buf->b_shortname = FALSE;
#endif
    buf->b_p_eol = TRUE;
    buf->b_start_eol = TRUE;
#ifdef FEAT_MBYTE
    buf->b_p_bomb = FALSE;
    buf->b_start_bomb = FALSE;
#endif
    buf->b_ml.ml_mfp = NULL;
    buf->b_ml.ml_flags = ML_EMPTY;              /* empty buffer */
#ifdef FEAT_NETBEANS_INTG
    netbeans_deleted_all_lines(buf);
#endif
}

/*
 * buf_freeall() - free all things allocated for a buffer that are related to
 * the file.
 */
/*ARGSUSED*/
    void
buf_freeall(buf, del_buf, wipe_buf)
    buf_T       *buf;
    int         del_buf;        /* buffer is going to be deleted */
    int         wipe_buf;       /* buffer is going to be wiped out */
{
#ifdef FEAT_AUTOCMD
    int         is_curbuf = (buf == curbuf);

    apply_autocmds(EVENT_BUFUNLOAD, buf->b_fname, buf->b_fname, FALSE, buf);
    if (!buf_valid(buf))            /* autocommands may delete the buffer */
        return;
    if (del_buf && buf->b_p_bl)
    {
        apply_autocmds(EVENT_BUFDELETE, buf->b_fname, buf->b_fname, FALSE, buf);
        if (!buf_valid(buf))        /* autocommands may delete the buffer */
            return;
    }
    if (wipe_buf)
    {
        apply_autocmds(EVENT_BUFWIPEOUT, buf->b_fname, buf->b_fname,
                                                                  FALSE, buf);
        if (!buf_valid(buf))        /* autocommands may delete the buffer */
            return;
    }
# ifdef FEAT_EVAL
    if (aborting())         /* autocmds may abort script processing */
        return;
# endif

    /*
     * It's possible that autocommands change curbuf to the one being deleted.
     * This might cause curbuf to be deleted unexpectedly.  But in some cases
     * it's OK to delete the curbuf, because a new one is obtained anyway.
     * Therefore only return if curbuf changed to the deleted buffer.
     */
    if (buf == curbuf && !is_curbuf)
        return;
#endif
#ifdef FEAT_DIFF
    diff_buf_delete(buf);           /* Can't use 'diff' for unloaded buffer. */
#endif

#ifdef FEAT_FOLDING
    /* No folds in an empty buffer. */
# ifdef FEAT_WINDOWS
    {
        win_T           *win;
        tabpage_T       *tp;

        FOR_ALL_TAB_WINDOWS(tp, win)
            if (win->w_buffer == buf)
                clearFolding(win);
    }
# else
    if (curwin->w_buffer == buf)
        clearFolding(curwin);
# endif
#endif

#ifdef FEAT_TCL
    tcl_buffer_free(buf);
#endif
    u_blockfree(buf);               /* free the memory allocated for undo */
    ml_close(buf, TRUE);            /* close and delete the memline/memfile */
    buf->b_ml.ml_line_count = 0;    /* no lines in buffer */
    u_clearall(buf);                /* reset all undo information */
#ifdef FEAT_SYN_HL
    syntax_clear(buf);              /* reset syntax info */
#endif
    buf->b_flags &= ~BF_READERR;    /* a read error is no longer relevant */
}

/*
 * Free a buffer structure and the things it contains related to the buffer
 * itself (not the file, that must have been done already).
 */
    static void
free_buffer(buf)
    buf_T       *buf;
{
    free_buffer_stuff(buf, TRUE);
#ifdef FEAT_MZSCHEME
    mzscheme_buffer_free(buf);
#endif
#ifdef FEAT_PERL
    perl_buf_free(buf);
#endif
#ifdef FEAT_PYTHON
    python_buffer_free(buf);
#endif
#ifdef FEAT_RUBY
    ruby_buffer_free(buf);
#endif
#ifdef FEAT_AUTOCMD
    aubuflocal_remove(buf);
#endif
    vim_free(buf);
}

/*
 * Free stuff in the buffer for ":bdel" and when wiping out the buffer.
 */
    static void
free_buffer_stuff(buf, free_options)
    buf_T       *buf;
    int         free_options;           /* free options as well */
{
    if (free_options)
    {
        clear_wininfo(buf);             /* including window-local options */
        free_buf_options(buf, TRUE);
    }
#ifdef FEAT_EVAL
    vars_clear(&buf->b_vars.dv_hashtab); /* free all internal variables */
    hash_init(&buf->b_vars.dv_hashtab);
#endif
#ifdef FEAT_USR_CMDS
    uc_clear(&buf->b_ucmds);            /* clear local user commands */
#endif
#ifdef FEAT_SIGNS
    buf_delete_signs(buf);              /* delete any signs */
#endif
#ifdef FEAT_LOCALMAP
    map_clear_int(buf, MAP_ALL_MODES, TRUE, FALSE);  /* clear local mappings */
    map_clear_int(buf, MAP_ALL_MODES, TRUE, TRUE);   /* clear local abbrevs */
#endif
#ifdef FEAT_MBYTE
    vim_free(buf->b_start_fenc);
    buf->b_start_fenc = NULL;
#endif
}

/*
 * Free the b_wininfo list for buffer "buf".
 */
    static void
clear_wininfo(buf)
    buf_T       *buf;
{
    wininfo_T   *wip;

    while (buf->b_wininfo != NULL)
    {
        wip = buf->b_wininfo;
        buf->b_wininfo = wip->wi_next;
        if (wip->wi_optset)
        {
            clear_winopt(&wip->wi_opt);
#ifdef FEAT_FOLDING
            deleteFoldRecurse(&wip->wi_folds);
#endif
        }
        vim_free(wip);
    }
}

#if defined(FEAT_LISTCMDS) || defined(PROTO)
/*
 * Go to another buffer.  Handles the result of the ATTENTION dialog.
 */
    void
goto_buffer(eap, start, dir, count)
    exarg_T     *eap;
    int         start;
    int         dir;
    int         count;
{
# if defined(FEAT_WINDOWS) && defined(HAS_SWAP_EXISTS_ACTION)
    buf_T       *old_curbuf = curbuf;

    swap_exists_action = SEA_DIALOG;
# endif
    (void)do_buffer(*eap->cmd == 's' ? DOBUF_SPLIT : DOBUF_GOTO,
                                             start, dir, count, eap->forceit);
# if defined(FEAT_WINDOWS) && defined(HAS_SWAP_EXISTS_ACTION)
    if (swap_exists_action == SEA_QUIT && *eap->cmd == 's')
    {
#  if defined(FEAT_AUTOCMD) && defined(FEAT_EVAL)
        cleanup_T   cs;

        /* Reset the error/interrupt/exception state here so that
         * aborting() returns FALSE when closing a window. */
        enter_cleanup(&cs);
#  endif

        /* Quitting means closing the split window, nothing else. */
        win_close(curwin, TRUE);
        swap_exists_action = SEA_NONE;
        swap_exists_did_quit = TRUE;

#  if defined(FEAT_AUTOCMD) && defined(FEAT_EVAL)
        /* Restore the error/interrupt/exception state if not discarded by a
         * new aborting error, interrupt, or uncaught exception. */
        leave_cleanup(&cs);
#  endif
    }
    else
        handle_swap_exists(old_curbuf);
# endif
}
#endif

#if defined(HAS_SWAP_EXISTS_ACTION) || defined(PROTO)
/*
 * Handle the situation of swap_exists_action being set.
 * It is allowed for "old_curbuf" to be NULL or invalid.
 */
    void
handle_swap_exists(old_curbuf)
    buf_T       *old_curbuf;
{
# if defined(FEAT_AUTOCMD) && defined(FEAT_EVAL)
    cleanup_T   cs;
# endif

    if (swap_exists_action == SEA_QUIT)
    {
# if defined(FEAT_AUTOCMD) && defined(FEAT_EVAL)
        /* Reset the error/interrupt/exception state here so that
         * aborting() returns FALSE when closing a buffer. */
        enter_cleanup(&cs);
# endif

        /* User selected Quit at ATTENTION prompt.  Go back to previous
         * buffer.  If that buffer is gone or the same as the current one,
         * open a new, empty buffer. */
        swap_exists_action = SEA_NONE;  /* don't want it again */
        swap_exists_did_quit = TRUE;
        close_buffer(curwin, curbuf, DOBUF_UNLOAD);
        if (!buf_valid(old_curbuf) || old_curbuf == curbuf)
            old_curbuf = buflist_new(NULL, NULL, 1L, BLN_CURBUF | BLN_LISTED);
        if (old_curbuf != NULL)
            enter_buffer(old_curbuf);
        /* If "old_curbuf" is NULL we are in big trouble here... */

# if defined(FEAT_AUTOCMD) && defined(FEAT_EVAL)
        /* Restore the error/interrupt/exception state if not discarded by a
         * new aborting error, interrupt, or uncaught exception. */
        leave_cleanup(&cs);
# endif
    }
    else if (swap_exists_action == SEA_RECOVER)
    {
# if defined(FEAT_AUTOCMD) && defined(FEAT_EVAL)
        /* Reset the error/interrupt/exception state here so that
         * aborting() returns FALSE when closing a buffer. */
        enter_cleanup(&cs);
# endif

        /* User selected Recover at ATTENTION prompt. */
        msg_scroll = TRUE;
        ml_recover();
        MSG_PUTS("\n"); /* don't overwrite the last message */
        cmdline_row = msg_row;
        do_modelines(0);

# if defined(FEAT_AUTOCMD) && defined(FEAT_EVAL)
        /* Restore the error/interrupt/exception state if not discarded by a
         * new aborting error, interrupt, or uncaught exception. */
        leave_cleanup(&cs);
# endif
    }
    swap_exists_action = SEA_NONE;
}
#endif

#if defined(FEAT_LISTCMDS) || defined(PROTO)
/*
 * do_bufdel() - delete or unload buffer(s)
 *
 * addr_count == 0: ":bdel" - delete current buffer
 * addr_count == 1: ":N bdel" or ":bdel N [N ..]" - first delete
 *                  buffer "end_bnr", then any other arguments.
 * addr_count == 2: ":N,N bdel" - delete buffers in range
 *
 * command can be DOBUF_UNLOAD (":bunload"), DOBUF_WIPE (":bwipeout") or
 * DOBUF_DEL (":bdel")
 *
 * Returns error message or NULL
 */
    char_u *
do_bufdel(command, arg, addr_count, start_bnr, end_bnr, forceit)
    int         command;
    char_u      *arg;           /* pointer to extra arguments */
    int         addr_count;
    int         start_bnr;      /* first buffer number in a range */
    int         end_bnr;        /* buffer nr or last buffer nr in a range */
    int         forceit;
{
    int         do_current = 0; /* delete current buffer? */
    int         deleted = 0;    /* number of buffers deleted */
    char_u      *errormsg = NULL; /* return value */
    int         bnr;            /* buffer number */
    char_u      *p;

#ifdef FEAT_NETBEANS_INTG
    netbeansCloseFile = 1;
#endif
    if (addr_count == 0)
    {
        (void)do_buffer(command, DOBUF_CURRENT, FORWARD, 0, forceit);
    }
    else
    {
        if (addr_count == 2)
        {
            if (*arg)           /* both range and argument is not allowed */
                return (char_u *)_(e_trailing);
            bnr = start_bnr;
        }
        else    /* addr_count == 1 */
            bnr = end_bnr;

        for ( ;!got_int; ui_breakcheck())
        {
            /*
             * delete the current buffer last, otherwise when the
             * current buffer is deleted, the next buffer becomes
             * the current one and will be loaded, which may then
             * also be deleted, etc.
             */
            if (bnr == curbuf->b_fnum)
                do_current = bnr;
            else if (do_buffer(command, DOBUF_FIRST, FORWARD, (int)bnr,
                                                               forceit) == OK)
                ++deleted;

            /*
             * find next buffer number to delete/unload
             */
            if (addr_count == 2)
            {
                if (++bnr > end_bnr)
                    break;
            }
            else    /* addr_count == 1 */
            {
                arg = skipwhite(arg);
                if (*arg == NUL)
                    break;
                if (!VIM_ISDIGIT(*arg))
                {
                    p = skiptowhite_esc(arg);
                    bnr = buflist_findpat(arg, p, command == DOBUF_WIPE, FALSE);
                    if (bnr < 0)            /* failed */
                        break;
                    arg = p;
                }
                else
                    bnr = getdigits(&arg);
            }
        }
        if (!got_int && do_current && do_buffer(command, DOBUF_FIRST,
                                          FORWARD, do_current, forceit) == OK)
            ++deleted;

        if (deleted == 0)
        {
            if (command == DOBUF_UNLOAD)
                STRCPY(IObuff, _("E515: No buffers were unloaded"));
            else if (command == DOBUF_DEL)
                STRCPY(IObuff, _("E516: No buffers were deleted"));
            else
                STRCPY(IObuff, _("E517: No buffers were wiped out"));
            errormsg = IObuff;
        }
        else if (deleted >= p_report)
        {
            if (command == DOBUF_UNLOAD)
            {
                if (deleted == 1)
                    MSG(_("1 buffer unloaded"));
                else
                    smsg((char_u *)_("%d buffers unloaded"), deleted);
            }
            else if (command == DOBUF_DEL)
            {
                if (deleted == 1)
                    MSG(_("1 buffer deleted"));
                else
                    smsg((char_u *)_("%d buffers deleted"), deleted);
            }
            else
            {
                if (deleted == 1)
                    MSG(_("1 buffer wiped out"));
                else
                    smsg((char_u *)_("%d buffers wiped out"), deleted);
            }
        }
    }

#ifdef FEAT_NETBEANS_INTG
    netbeansCloseFile = 0;
#endif

    return errormsg;
}

/*
 * Implementation of the commands for the buffer list.
 *
 * action == DOBUF_GOTO     go to specified buffer
 * action == DOBUF_SPLIT    split window and go to specified buffer
 * action == DOBUF_UNLOAD   unload specified buffer(s)
 * action == DOBUF_DEL      delete specified buffer(s) from buffer list
 * action == DOBUF_WIPE     delete specified buffer(s) really
 *
 * start == DOBUF_CURRENT   go to "count" buffer from current buffer
 * start == DOBUF_FIRST     go to "count" buffer from first buffer
 * start == DOBUF_LAST      go to "count" buffer from last buffer
 * start == DOBUF_MOD       go to "count" modified buffer from current buffer
 *
 * Return FAIL or OK.
 */
    int
do_buffer(action, start, dir, count, forceit)
    int         action;
    int         start;
    int         dir;            /* FORWARD or BACKWARD */
    int         count;          /* buffer number or number of buffers */
    int         forceit;        /* TRUE for :...! */
{
    buf_T       *buf;
    buf_T       *bp;
    int         unload = (action == DOBUF_UNLOAD || action == DOBUF_DEL
                                                     || action == DOBUF_WIPE);

    switch (start)
    {
        case DOBUF_FIRST:   buf = firstbuf; break;
        case DOBUF_LAST:    buf = lastbuf;  break;
        default:            buf = curbuf;   break;
    }
    if (start == DOBUF_MOD)         /* find next modified buffer */
    {
        while (count-- > 0)
        {
            do
            {
                buf = buf->b_next;
                if (buf == NULL)
                    buf = firstbuf;
            }
            while (buf != curbuf && !bufIsChanged(buf));
        }
        if (!bufIsChanged(buf))
        {
            EMSG(_("E84: No modified buffer found"));
            return FAIL;
        }
    }
    else if (start == DOBUF_FIRST && count) /* find specified buffer number */
    {
        while (buf != NULL && buf->b_fnum != count)
            buf = buf->b_next;
    }
    else
    {
        bp = NULL;
        while (count > 0 || (!unload && !buf->b_p_bl && bp != buf))
        {
            /* remember the buffer where we start, we come back there when all
             * buffers are unlisted. */
            if (bp == NULL)
                bp = buf;
            if (dir == FORWARD)
            {
                buf = buf->b_next;
                if (buf == NULL)
                    buf = firstbuf;
            }
            else
            {
                buf = buf->b_prev;
                if (buf == NULL)
                    buf = lastbuf;
            }
            /* don't count unlisted buffers */
            if (unload || buf->b_p_bl)
            {
                 --count;
                 bp = NULL;     /* use this buffer as new starting point */
            }
            if (bp == buf)
            {
                /* back where we started, didn't find anything. */
                EMSG(_("E85: There is no listed buffer"));
                return FAIL;
            }
        }
    }

    if (buf == NULL)        /* could not find it */
    {
        if (start == DOBUF_FIRST)
        {
            /* don't warn when deleting */
            if (!unload)
                EMSGN(_("E86: Buffer %ld does not exist"), count);
        }
        else if (dir == FORWARD)
            EMSG(_("E87: Cannot go beyond last buffer"));
        else
            EMSG(_("E88: Cannot go before first buffer"));
        return FAIL;
    }

#ifdef FEAT_GUI
    need_mouse_correct = TRUE;
#endif

#ifdef FEAT_LISTCMDS
    /*
     * delete buffer buf from memory and/or the list
     */
    if (unload)
    {
        int     forward;
        int     retval;

        /* When unloading or deleting a buffer that's already unloaded and
         * unlisted: fail silently. */
        if (action != DOBUF_WIPE && buf->b_ml.ml_mfp == NULL && !buf->b_p_bl)
            return FAIL;

        if (!forceit && bufIsChanged(buf))
        {
#if defined(FEAT_GUI_DIALOG) || defined(FEAT_CON_DIALOG)
            if ((p_confirm || cmdmod.confirm) && p_write)
            {
                dialog_changed(buf, FALSE);
# ifdef FEAT_AUTOCMD
                if (!buf_valid(buf))
                    /* Autocommand deleted buffer, oops!  It's not changed
                     * now. */
                    return FAIL;
# endif
                /* If it's still changed fail silently, the dialog already
                 * mentioned why it fails. */
                if (bufIsChanged(buf))
                    return FAIL;
            }
            else
#endif
            {
                EMSGN(_("E89: No write since last change for buffer %ld (add ! to override)"),
                                                                 buf->b_fnum);
                return FAIL;
            }
        }

        /*
         * If deleting the last (listed) buffer, make it empty.
         * The last (listed) buffer cannot be unloaded.
         */
        for (bp = firstbuf; bp != NULL; bp = bp->b_next)
            if (bp->b_p_bl && bp != buf)
                break;
        if (bp == NULL && buf == curbuf)
        {
            if (action == DOBUF_UNLOAD)
            {
                EMSG(_("E90: Cannot unload last buffer"));
                return FAIL;
            }

            /* Close any other windows on this buffer, then make it empty. */
#ifdef FEAT_WINDOWS
            close_windows(buf, TRUE);
#endif
            setpcmark();
            retval = do_ecmd(0, NULL, NULL, NULL, ECMD_ONE,
                                                  forceit ? ECMD_FORCEIT : 0);

            /*
             * do_ecmd() may create a new buffer, then we have to delete
             * the old one.  But do_ecmd() may have done that already, check
             * if the buffer still exists.
             */
            if (buf != curbuf && buf_valid(buf) && buf->b_nwindows == 0)
                close_buffer(NULL, buf, action);
            return retval;
        }

#ifdef FEAT_WINDOWS
        /*
         * If the deleted buffer is the current one, close the current window
         * (unless it's the only window).  Repeat this so long as we end up in
         * a window with this buffer.
         */
        while (buf == curbuf
                   && (firstwin != lastwin || first_tabpage->tp_next != NULL))
            win_close(curwin, FALSE);
#endif

        /*
         * If the buffer to be deleted is not the current one, delete it here.
         */
        if (buf != curbuf)
        {
#ifdef FEAT_WINDOWS
            close_windows(buf, FALSE);
#endif
            if (buf != curbuf && buf_valid(buf) && buf->b_nwindows <= 0)
                close_buffer(NULL, buf, action);
            return OK;
        }

        /*
         * Deleting the current buffer: Need to find another buffer to go to.
         * There must be another, otherwise it would have been handled above.
         * First use au_new_curbuf, if it is valid.
         * Then prefer the buffer we most recently visited.
         * Else try to find one that is loaded, after the current buffer,
         * then before the current buffer.
         * Finally use any buffer.
         */
        buf = NULL;     /* selected buffer */
        bp = NULL;      /* used when no loaded buffer found */
#ifdef FEAT_AUTOCMD
        if (au_new_curbuf != NULL && buf_valid(au_new_curbuf))
            buf = au_new_curbuf;
# ifdef FEAT_JUMPLIST
        else
# endif
#endif
#ifdef FEAT_JUMPLIST
            if (curwin->w_jumplistlen > 0)
        {
            int     jumpidx;

            jumpidx = curwin->w_jumplistidx - 1;
            if (jumpidx < 0)
                jumpidx = curwin->w_jumplistlen - 1;

            forward = jumpidx;
            while (jumpidx != curwin->w_jumplistidx)
            {
                buf = buflist_findnr(curwin->w_jumplist[jumpidx].fmark.fnum);
                if (buf != NULL)
                {
                    if (buf == curbuf || !buf->b_p_bl)
                        buf = NULL;     /* skip current and unlisted bufs */
                    else if (buf->b_ml.ml_mfp == NULL)
                    {
                        /* skip unloaded buf, but may keep it for later */
                        if (bp == NULL)
                            bp = buf;
                        buf = NULL;
                    }
                }
                if (buf != NULL)   /* found a valid buffer: stop searching */
                    break;
                /* advance to older entry in jump list */
                if (!jumpidx && curwin->w_jumplistidx == curwin->w_jumplistlen)
                    break;
                if (--jumpidx < 0)
                    jumpidx = curwin->w_jumplistlen - 1;
                if (jumpidx == forward)         /* List exhausted for sure */
                    break;
            }
        }
#endif

        if (buf == NULL)        /* No previous buffer, Try 2'nd approach */
        {
            forward = TRUE;
            buf = curbuf->b_next;
            for (;;)
            {
                if (buf == NULL)
                {
                    if (!forward)       /* tried both directions */
                        break;
                    buf = curbuf->b_prev;
                    forward = FALSE;
                    continue;
                }
                /* in non-help buffer, try to skip help buffers, and vv */
                if (buf->b_help == curbuf->b_help && buf->b_p_bl)
                {
                    if (buf->b_ml.ml_mfp != NULL)   /* found loaded buffer */
                        break;
                    if (bp == NULL)     /* remember unloaded buf for later */
                        bp = buf;
                }
                if (forward)
                    buf = buf->b_next;
                else
                    buf = buf->b_prev;
            }
        }
        if (buf == NULL)        /* No loaded buffer, use unloaded one */
            buf = bp;
        if (buf == NULL)        /* No loaded buffer, find listed one */
        {
            for (buf = firstbuf; buf != NULL; buf = buf->b_next)
                if (buf->b_p_bl && buf != curbuf)
                    break;
        }
        if (buf == NULL)        /* Still no buffer, just take one */
        {
            if (curbuf->b_next != NULL)
                buf = curbuf->b_next;
            else
                buf = curbuf->b_prev;
        }
    }

    /*
     * make buf current buffer
     */
    if (action == DOBUF_SPLIT)      /* split window first */
    {
# ifdef FEAT_WINDOWS
        /* If 'switchbuf' contains "useopen": jump to first window containing
         * "buf" if one exists */
        if ((swb_flags & SWB_USEOPEN) && buf_jump_open_win(buf))
            return OK;
        /* If 'switchbuf' contians "usetab": jump to first window in any tab
         * page containing "buf" if one exists */
        if ((swb_flags & SWB_USETAB) && buf_jump_open_tab(buf))
            return OK;
        if (win_split(0, 0) == FAIL)
# endif
            return FAIL;
    }
#endif

    /* go to current buffer - nothing to do */
    if (buf == curbuf)
        return OK;

    /*
     * Check if the current buffer may be abandoned.
     */
    if (action == DOBUF_GOTO && !can_abandon(curbuf, forceit))
    {
#if defined(FEAT_GUI_DIALOG) || defined(FEAT_CON_DIALOG)
        if ((p_confirm || cmdmod.confirm) && p_write)
        {
            dialog_changed(curbuf, FALSE);
# ifdef FEAT_AUTOCMD
            if (!buf_valid(buf))
                /* Autocommand deleted buffer, oops! */
                return FAIL;
# endif
        }
        if (bufIsChanged(curbuf))
#endif
        {
            EMSG(_(e_nowrtmsg));
            return FAIL;
        }
    }

    /* Go to the other buffer. */
    set_curbuf(buf, action);

#if defined(FEAT_LISTCMDS) && defined(FEAT_SCROLLBIND)
    if (action == DOBUF_SPLIT)
        curwin->w_p_scb = FALSE;        /* reset 'scrollbind' */
#endif

#if defined(FEAT_AUTOCMD) && defined(FEAT_EVAL)
    if (aborting())         /* autocmds may abort script processing */
        return FAIL;
#endif

    return OK;
}

#endif /* FEAT_LISTCMDS */

/*
 * Set current buffer to "buf".  Executes autocommands and closes current
 * buffer.  "action" tells how to close the current buffer:
 * DOBUF_GOTO       free or hide it
 * DOBUF_SPLIT      nothing
 * DOBUF_UNLOAD     unload it
 * DOBUF_DEL        delete it
 * DOBUF_WIPE       wipe it out
 */
    void
set_curbuf(buf, action)
    buf_T       *buf;
    int         action;
{
    buf_T       *prevbuf;
    int         unload = (action == DOBUF_UNLOAD || action == DOBUF_DEL
                                                     || action == DOBUF_WIPE);

    setpcmark();
    if (!cmdmod.keepalt)
        curwin->w_alt_fnum = curbuf->b_fnum; /* remember alternate file */
    buflist_altfpos();                   /* remember curpos */

#ifdef FEAT_VISUAL
    /* Don't restart Select mode after switching to another buffer. */
    VIsual_reselect = FALSE;
#endif

    /* close_windows() or apply_autocmds() may change curbuf */
    prevbuf = curbuf;

#ifdef FEAT_AUTOCMD
    apply_autocmds(EVENT_BUFLEAVE, NULL, NULL, FALSE, curbuf);
# ifdef FEAT_EVAL
    if (buf_valid(prevbuf) && !aborting())
# else
    if (buf_valid(prevbuf))
# endif
#endif
    {
#ifdef FEAT_WINDOWS
        if (unload)
            close_windows(prevbuf, FALSE);
#endif
#if defined(FEAT_AUTOCMD) && defined(FEAT_EVAL)
        if (buf_valid(prevbuf) && !aborting())
#else
        if (buf_valid(prevbuf))
#endif
        {
            if (prevbuf == curbuf)
                u_sync(FALSE);
            close_buffer(prevbuf == curwin->w_buffer ? curwin : NULL, prevbuf,
                    unload ? action : (action == DOBUF_GOTO
                        && !P_HID(prevbuf)
                        && !bufIsChanged(prevbuf)) ? DOBUF_UNLOAD : 0);
        }
    }
#ifdef FEAT_AUTOCMD
# ifdef FEAT_EVAL
    /* An autocommand may have deleted buf or aborted the script processing! */
    if (buf_valid(buf) && !aborting())
# else
    if (buf_valid(buf))     /* an autocommand may have deleted buf! */
# endif
#endif
        enter_buffer(buf);
}

/*
 * Enter a new current buffer.
 * Old curbuf must have been abandoned already!
 */
    void
enter_buffer(buf)
    buf_T       *buf;
{
    /* Copy buffer and window local option values.  Not for a help buffer. */
    buf_copy_options(buf, BCO_ENTER | BCO_NOHELP);
    if (!buf->b_help)
        get_winopts(buf);
#ifdef FEAT_FOLDING
    else
        /* Remove all folds in the window. */
        clearFolding(curwin);
    foldUpdateAll(curwin);      /* update folds (later). */
#endif

    /* Get the buffer in the current window. */
    curwin->w_buffer = buf;
    curbuf = buf;
    ++curbuf->b_nwindows;

#ifdef FEAT_DIFF
    if (curwin->w_p_diff)
        diff_buf_add(curbuf);
#endif

    /* Cursor on first line by default. */
    curwin->w_cursor.lnum = 1;
    curwin->w_cursor.col = 0;
#ifdef FEAT_VIRTUALEDIT
    curwin->w_cursor.coladd = 0;
#endif
    curwin->w_set_curswant = TRUE;

    /* Make sure the buffer is loaded. */
    if (curbuf->b_ml.ml_mfp == NULL)    /* need to load the file */
    {
#ifdef FEAT_AUTOCMD
        /* If there is no filetype, allow for detecting one.  Esp. useful for
         * ":ball" used in a autocommand.  If there already is a filetype we
         * might prefer to keep it. */
        if (*curbuf->b_p_ft == NUL)
            did_filetype = FALSE;
#endif

        open_buffer(FALSE, NULL);
    }
    else
    {
        if (!msg_silent)
            need_fileinfo = TRUE;       /* display file info after redraw */
        (void)buf_check_timestamp(curbuf, FALSE); /* check if file changed */
#ifdef FEAT_AUTOCMD
        curwin->w_topline = 1;
# ifdef FEAT_DIFF
        curwin->w_topfill = 0;
# endif
        apply_autocmds(EVENT_BUFENTER, NULL, NULL, FALSE, curbuf);
        apply_autocmds(EVENT_BUFWINENTER, NULL, NULL, FALSE, curbuf);
#endif
    }

    /* If autocommands did not change the cursor position, restore cursor lnum
     * and possibly cursor col. */
    if (curwin->w_cursor.lnum == 1 && inindent(0))
        buflist_getfpos();

    check_arg_idx(curwin);              /* check for valid arg_idx */
#ifdef FEAT_TITLE
    maketitle();
#endif
#ifdef FEAT_AUTOCMD
    if (curwin->w_topline == 1)         /* when autocmds didn't change it */
#endif
        scroll_cursor_halfway(FALSE);   /* redisplay at correct position */

#ifdef FEAT_NETBEANS_INTG
    /* Send fileOpened event because we've changed buffers. */
    if (usingNetbeans && isNetbeansBuffer(curbuf))
        netbeans_file_activated(curbuf);
#endif

    /* Change directories when the 'acd' option is set. */
    DO_AUTOCHDIR

#ifdef FEAT_KEYMAP
    if (curbuf->b_kmap_state & KEYMAP_INIT)
        keymap_init();
#endif
#ifdef FEAT_SPELL
    /* May need to set the spell language.  Can only do this after the buffer
     * has been properly setup. */
    if (!curbuf->b_help && curwin->w_p_spell && *curbuf->b_p_spl != NUL)
        did_set_spelllang(curbuf);
#endif

    redraw_later(NOT_VALID);
}

#if defined(FEAT_AUTOCHDIR) || defined(PROTO)
/*
 * Change to the directory of the current buffer.
 */
    void
do_autochdir()
{
    if (curbuf->b_ffname != NULL && vim_chdirfile(curbuf->b_ffname) == OK)
        shorten_fnames(TRUE);
}
#endif

/*
 * functions for dealing with the buffer list
 */

/*
 * Add a file name to the buffer list.  Return a pointer to the buffer.
 * If the same file name already exists return a pointer to that buffer.
 * If it does not exist, or if fname == NULL, a new entry is created.
 * If (flags & BLN_CURBUF) is TRUE, may use current buffer.
 * If (flags & BLN_LISTED) is TRUE, add new buffer to buffer list.
 * If (flags & BLN_DUMMY) is TRUE, don't count it as a real buffer.
 * This is the ONLY way to create a new buffer.
 */
static int  top_file_num = 1;           /* highest file number */

    buf_T *
buflist_new(ffname, sfname, lnum, flags)
    char_u      *ffname;        /* full path of fname or relative */
    char_u      *sfname;        /* short fname or NULL */
    linenr_T    lnum;           /* preferred cursor line */
    int         flags;          /* BLN_ defines */
{
    buf_T       *buf;
#ifdef UNIX
    struct stat st;
#endif

    fname_expand(curbuf, &ffname, &sfname);     /* will allocate ffname */

    /*
     * If file name already exists in the list, update the entry.
     */
#ifdef UNIX
    /* On Unix we can use inode numbers when the file exists.  Works better
     * for hard links. */
    if (sfname == NULL || mch_stat((char *)sfname, &st) < 0)
        st.st_dev = (dev_T)-1;
#endif
    if (ffname != NULL && !(flags & BLN_DUMMY) && (buf =
#ifdef UNIX
                buflist_findname_stat(ffname, &st)
#else
                buflist_findname(ffname)
#endif
                ) != NULL)
    {
        vim_free(ffname);
        if (lnum != 0)
            buflist_setfpos(buf, curwin, lnum, (colnr_T)0, FALSE);
        /* copy the options now, if 'cpo' doesn't have 's' and not done
         * already */
        buf_copy_options(buf, 0);
        if ((flags & BLN_LISTED) && !buf->b_p_bl)
        {
            buf->b_p_bl = TRUE;
#ifdef FEAT_AUTOCMD
            if (!(flags & BLN_DUMMY))
                apply_autocmds(EVENT_BUFADD, NULL, NULL, FALSE, buf);
#endif
        }
        return buf;
    }

    /*
     * If the current buffer has no name and no contents, use the current
     * buffer.  Otherwise: Need to allocate a new buffer structure.
     *
     * This is the ONLY place where a new buffer structure is allocated!
     * (A spell file buffer is allocated in spell.c, but that's not a normal
     * buffer.)
     */
    buf = NULL;
    if ((flags & BLN_CURBUF)
            && curbuf != NULL
            && curbuf->b_ffname == NULL
            && curbuf->b_nwindows <= 1
            && (curbuf->b_ml.ml_mfp == NULL || bufempty()))
    {
        buf = curbuf;
#ifdef FEAT_AUTOCMD
        /* It's like this buffer is deleted.  Watch out for autocommands that
         * change curbuf!  If that happens, allocate a new buffer anyway. */
        if (curbuf->b_p_bl)
            apply_autocmds(EVENT_BUFDELETE, NULL, NULL, FALSE, curbuf);
        if (buf == curbuf)
            apply_autocmds(EVENT_BUFWIPEOUT, NULL, NULL, FALSE, curbuf);
# ifdef FEAT_EVAL
        if (aborting())         /* autocmds may abort script processing */
            return NULL;
# endif
#endif
#ifdef FEAT_QUICKFIX
# ifdef FEAT_AUTOCMD
        if (buf == curbuf)
# endif
        {
            /* Make sure 'bufhidden' and 'buftype' are empty */
            clear_string_option(&buf->b_p_bh);
            clear_string_option(&buf->b_p_bt);
        }
#endif
    }
    if (buf != curbuf || curbuf == NULL)
    {
        buf = (buf_T *)alloc_clear((unsigned)sizeof(buf_T));
        if (buf == NULL)
        {
            vim_free(ffname);
            return NULL;
        }
    }

    if (ffname != NULL)
    {
        buf->b_ffname = ffname;
        buf->b_sfname = vim_strsave(sfname);
    }

    clear_wininfo(buf);
    buf->b_wininfo = (wininfo_T *)alloc_clear((unsigned)sizeof(wininfo_T));

    if ((ffname != NULL && (buf->b_ffname == NULL || buf->b_sfname == NULL))
            || buf->b_wininfo == NULL)
    {
        vim_free(buf->b_ffname);
        buf->b_ffname = NULL;
        vim_free(buf->b_sfname);
        buf->b_sfname = NULL;
        if (buf != curbuf)
            free_buffer(buf);
        return NULL;
    }

    if (buf == curbuf)
    {
        /* free all things allocated for this buffer */
        buf_freeall(buf, FALSE, FALSE);
        if (buf != curbuf)       /* autocommands deleted the buffer! */
            return NULL;
#if defined(FEAT_AUTOCMD) && defined(FEAT_EVAL)
        if (aborting())         /* autocmds may abort script processing */
            return NULL;
#endif
        /* buf->b_nwindows = 0; why was this here? */
        free_buffer_stuff(buf, FALSE);  /* delete local variables et al. */
#ifdef FEAT_KEYMAP
        /* need to reload lmaps and set b:keymap_name */
        curbuf->b_kmap_state |= KEYMAP_INIT;
#endif
    }
    else
    {
        /*
         * put new buffer at the end of the buffer list
         */
        buf->b_next = NULL;
        if (firstbuf == NULL)           /* buffer list is empty */
        {
            buf->b_prev = NULL;
            firstbuf = buf;
        }
        else                            /* append new buffer at end of list */
        {
            lastbuf->b_next = buf;
            buf->b_prev = lastbuf;
        }
        lastbuf = buf;

        buf->b_fnum = top_file_num++;
        if (top_file_num < 0)           /* wrap around (may cause duplicates) */
        {
            EMSG(_("W14: Warning: List of file names overflow"));
            if (emsg_silent == 0)
            {
                out_flush();
                ui_delay(3000L, TRUE);  /* make sure it is noticed */
            }
            top_file_num = 1;
        }

        /*
         * Always copy the options from the current buffer.
         */
        buf_copy_options(buf, BCO_ALWAYS);
    }

    buf->b_wininfo->wi_fpos.lnum = lnum;
    buf->b_wininfo->wi_win = curwin;

#ifdef FEAT_EVAL
    init_var_dict(&buf->b_vars, &buf->b_bufvar);    /* init b: variables */
#endif
#ifdef FEAT_SYN_HL
    hash_init(&buf->b_keywtab);
    hash_init(&buf->b_keywtab_ic);
#endif

    buf->b_fname = buf->b_sfname;
#ifdef UNIX
    if (st.st_dev == (dev_T)-1)
        buf->b_dev = -1;
    else
    {
        buf->b_dev = st.st_dev;
        buf->b_ino = st.st_ino;
    }
#endif
    buf->b_u_synced = TRUE;
    buf->b_flags = BF_CHECK_RO | BF_NEVERLOADED;
    if (flags & BLN_DUMMY)
        buf->b_flags |= BF_DUMMY;
    buf_clear_file(buf);
    clrallmarks(buf);                   /* clear marks */
    fmarks_check_names(buf);            /* check file marks for this file */
    buf->b_p_bl = (flags & BLN_LISTED) ? TRUE : FALSE;  /* init 'buflisted' */
#ifdef FEAT_AUTOCMD
    if (!(flags & BLN_DUMMY))
    {
        apply_autocmds(EVENT_BUFNEW, NULL, NULL, FALSE, buf);
        if (flags & BLN_LISTED)
            apply_autocmds(EVENT_BUFADD, NULL, NULL, FALSE, buf);
# ifdef FEAT_EVAL
        if (aborting())         /* autocmds may abort script processing */
            return NULL;
# endif
    }
#endif

    return buf;
}

/*
 * Free the memory for the options of a buffer.
 * If "free_p_ff" is TRUE also free 'fileformat', 'buftype' and
 * 'fileencoding'.
 */
    void
free_buf_options(buf, free_p_ff)
    buf_T       *buf;
    int         free_p_ff;
{
    if (free_p_ff)
    {
#ifdef FEAT_MBYTE
        clear_string_option(&buf->b_p_fenc);
#endif
        clear_string_option(&buf->b_p_ff);
#ifdef FEAT_QUICKFIX
        clear_string_option(&buf->b_p_bh);
        clear_string_option(&buf->b_p_bt);
#endif
    }
#ifdef FEAT_FIND_ID
    clear_string_option(&buf->b_p_def);
    clear_string_option(&buf->b_p_inc);
# ifdef FEAT_EVAL
    clear_string_option(&buf->b_p_inex);
# endif
#endif
#if defined(FEAT_CINDENT) && defined(FEAT_EVAL)
    clear_string_option(&buf->b_p_inde);
    clear_string_option(&buf->b_p_indk);
#endif
#if defined(FEAT_BEVAL) && defined(FEAT_EVAL)
    clear_string_option(&buf->b_p_bexpr);
#endif
#if defined(FEAT_EVAL)
    clear_string_option(&buf->b_p_fex);
#endif
#ifdef FEAT_CRYPT
    clear_string_option(&buf->b_p_key);
#endif
    clear_string_option(&buf->b_p_kp);
    clear_string_option(&buf->b_p_mps);
    clear_string_option(&buf->b_p_fo);
    clear_string_option(&buf->b_p_flp);
    clear_string_option(&buf->b_p_isk);
#ifdef FEAT_KEYMAP
    clear_string_option(&buf->b_p_keymap);
    ga_clear(&buf->b_kmap_ga);
#endif
#ifdef FEAT_COMMENTS
    clear_string_option(&buf->b_p_com);
#endif
#ifdef FEAT_FOLDING
    clear_string_option(&buf->b_p_cms);
#endif
    clear_string_option(&buf->b_p_nf);
#ifdef FEAT_SYN_HL
    clear_string_option(&buf->b_p_syn);
#endif
#ifdef FEAT_SPELL
    clear_string_option(&buf->b_p_spc);
    clear_string_option(&buf->b_p_spf);
    vim_free(buf->b_cap_prog);
    buf->b_cap_prog = NULL;
    clear_string_option(&buf->b_p_spl);
#endif
#ifdef FEAT_SEARCHPATH
    clear_string_option(&buf->b_p_sua);
#endif
#ifdef FEAT_AUTOCMD
    clear_string_option(&buf->b_p_ft);
#endif
#ifdef FEAT_OSFILETYPE
    clear_string_option(&buf->b_p_oft);
#endif
#ifdef FEAT_CINDENT
    clear_string_option(&buf->b_p_cink);
    clear_string_option(&buf->b_p_cino);
#endif
#if defined(FEAT_CINDENT) || defined(FEAT_SMARTINDENT)
    clear_string_option(&buf->b_p_cinw);
#endif
#ifdef FEAT_INS_EXPAND
    clear_string_option(&buf->b_p_cpt);
#endif
#ifdef FEAT_COMPL_FUNC
    clear_string_option(&buf->b_p_cfu);
    clear_string_option(&buf->b_p_ofu);
#endif
#ifdef FEAT_QUICKFIX
    clear_string_option(&buf->b_p_gp);
    clear_string_option(&buf->b_p_mp);
    clear_string_option(&buf->b_p_efm);
#endif
    clear_string_option(&buf->b_p_ep);
    clear_string_option(&buf->b_p_path);
    clear_string_option(&buf->b_p_tags);
#ifdef FEAT_INS_EXPAND
    clear_string_option(&buf->b_p_dict);
    clear_string_option(&buf->b_p_tsr);
#endif
#ifdef FEAT_TEXTOBJ
    clear_string_option(&buf->b_p_qe);
#endif
    buf->b_p_ar = -1;
}

/*
 * get alternate file n
 * set linenr to lnum or altfpos.lnum if lnum == 0
 *      also set cursor column to altfpos.col if 'startofline' is not set.
 * if (options & GETF_SETMARK) call setpcmark()
 * if (options & GETF_ALT) we are jumping to an alternate file.
 * if (options & GETF_SWITCH) respect 'switchbuf' settings when jumping
 *
 * return FAIL for failure, OK for success
 */
    int
buflist_getfile(n, lnum, options, forceit)
    int         n;
    linenr_T    lnum;
    int         options;
    int         forceit;
{
    buf_T       *buf;
#ifdef FEAT_WINDOWS
    win_T       *wp = NULL;
#endif
    pos_T       *fpos;
    colnr_T     col;

    buf = buflist_findnr(n);
    if (buf == NULL)
    {
        if ((options & GETF_ALT) && n == 0)
            EMSG(_(e_noalt));
        else
            EMSGN(_("E92: Buffer %ld not found"), n);
        return FAIL;
    }

    /* if alternate file is the current buffer, nothing to do */
    if (buf == curbuf)
        return OK;

    if (text_locked())
    {
        text_locked_msg();
        return FAIL;
    }
#ifdef FEAT_AUTOCMD
    if (curbuf_locked())
        return FAIL;
#endif

    /* altfpos may be changed by getfile(), get it now */
    if (lnum == 0)
    {
        fpos = buflist_findfpos(buf);
        lnum = fpos->lnum;
        col = fpos->col;
    }
    else
        col = 0;

#ifdef FEAT_WINDOWS
    if (options & GETF_SWITCH)
    {
        /* If 'switchbuf' contains "useopen": jump to first window containing
         * "buf" if one exists */
        if (swb_flags & SWB_USEOPEN)
            wp = buf_jump_open_win(buf);
        /* If 'switchbuf' contians "usetab": jump to first window in any tab
         * page containing "buf" if one exists */
        if (wp == NULL && (swb_flags & SWB_USETAB))
            wp = buf_jump_open_tab(buf);
        /* If 'switchbuf' contains "split" or "newtab" and the current buffer
         * isn't empty: open new window */
        if (wp == NULL && (swb_flags & (SWB_SPLIT | SWB_NEWTAB)) && !bufempty())
        {
            if (swb_flags & SWB_NEWTAB)         /* Open in a new tab */
                tabpage_new();
            else if (win_split(0, 0) == FAIL)   /* Open in a new window */
                return FAIL;
# ifdef FEAT_SCROLLBIND
            curwin->w_p_scb = FALSE;
# endif
        }
    }
#endif

    ++RedrawingDisabled;
    if (getfile(buf->b_fnum, NULL, NULL, (options & GETF_SETMARK),
                                                          lnum, forceit) <= 0)
    {
        --RedrawingDisabled;

        /* cursor is at to BOL and w_cursor.lnum is checked due to getfile() */
        if (!p_sol && col != 0)
        {
            curwin->w_cursor.col = col;
            check_cursor_col();
#ifdef FEAT_VIRTUALEDIT
            curwin->w_cursor.coladd = 0;
#endif
            curwin->w_set_curswant = TRUE;
        }
        return OK;
    }
    --RedrawingDisabled;
    return FAIL;
}

/*
 * go to the last know line number for the current buffer
 */
    void
buflist_getfpos()
{
    pos_T       *fpos;

    fpos = buflist_findfpos(curbuf);

    curwin->w_cursor.lnum = fpos->lnum;
    check_cursor_lnum();

    if (p_sol)
        curwin->w_cursor.col = 0;
    else
    {
        curwin->w_cursor.col = fpos->col;
        check_cursor_col();
#ifdef FEAT_VIRTUALEDIT
        curwin->w_cursor.coladd = 0;
#endif
        curwin->w_set_curswant = TRUE;
    }
}

#if defined(FEAT_QUICKFIX) || defined(FEAT_EVAL) || defined(PROTO)
/*
 * Find file in buffer list by name (it has to be for the current window).
 * Returns NULL if not found.
 */
    buf_T *
buflist_findname_exp(fname)
    char_u *fname;
{
    char_u      *ffname;
    buf_T       *buf = NULL;

    /* First make the name into a full path name */
    ffname = FullName_save(fname,
#ifdef UNIX
            TRUE            /* force expansion, get rid of symbolic links */
#else
            FALSE
#endif
            );
    if (ffname != NULL)
    {
        buf = buflist_findname(ffname);
        vim_free(ffname);
    }
    return buf;
}
#endif

/*
 * Find file in buffer list by name (it has to be for the current window).
 * "ffname" must have a full path.
 * Skips dummy buffers.
 * Returns NULL if not found.
 */
    buf_T *
buflist_findname(ffname)
    char_u      *ffname;
{
#ifdef UNIX
    struct stat st;

    if (mch_stat((char *)ffname, &st) < 0)
        st.st_dev = (dev_T)-1;
    return buflist_findname_stat(ffname, &st);
}

/*
 * Same as buflist_findname(), but pass the stat structure to avoid getting it
 * twice for the same file.
 * Returns NULL if not found.
 */
    static buf_T *
buflist_findname_stat(ffname, stp)
    char_u      *ffname;
    struct stat *stp;
{
#endif
    buf_T       *buf;

    for (buf = firstbuf; buf != NULL; buf = buf->b_next)
        if ((buf->b_flags & BF_DUMMY) == 0 && !otherfile_buf(buf, ffname
#ifdef UNIX
                    , stp
#endif
                    ))
            return buf;
    return NULL;
}

#if defined(FEAT_LISTCMDS) || defined(FEAT_EVAL) || defined(FEAT_PERL) || defined(PROTO)
/*
 * Find file in buffer list by a regexp pattern.
 * Return fnum of the found buffer.
 * Return < 0 for error.
 */
/*ARGSUSED*/
    int
buflist_findpat(pattern, pattern_end, unlisted, diffmode)
    char_u      *pattern;
    char_u      *pattern_end;   /* pointer to first char after pattern */
    int         unlisted;       /* find unlisted buffers */
    int         diffmode;       /* find diff-mode buffers only */
{
    buf_T       *buf;
    regprog_T   *prog;
    int         match = -1;
    int         find_listed;
    char_u      *pat;
    char_u      *patend;
    int         attempt;
    char_u      *p;
    int         toggledollar;

    if (pattern_end == pattern + 1 && (*pattern == '%' || *pattern == '#'))
    {
        if (*pattern == '%')
            match = curbuf->b_fnum;
        else
            match = curwin->w_alt_fnum;
#ifdef FEAT_DIFF
        if (diffmode && !diff_mode_buf(buflist_findnr(match)))
            match = -1;
#endif
    }

    /*
     * Try four ways of matching a listed buffer:
     * attempt == 0: without '^' or '$' (at any position)
     * attempt == 1: with '^' at start (only at position 0)
     * attempt == 2: with '$' at end (only match at end)
     * attempt == 3: with '^' at start and '$' at end (only full match)
     * Repeat this for finding an unlisted buffer if there was no matching
     * listed buffer.
     */
    else
    {
        pat = file_pat_to_reg_pat(pattern, pattern_end, NULL, FALSE);
        if (pat == NULL)
            return -1;
        patend = pat + STRLEN(pat) - 1;
        toggledollar = (patend > pat && *patend == '$');

        /* First try finding a listed buffer.  If not found and "unlisted"
         * is TRUE, try finding an unlisted buffer. */
        find_listed = TRUE;
        for (;;)
        {
            for (attempt = 0; attempt <= 3; ++attempt)
            {
                /* may add '^' and '$' */
                if (toggledollar)
                    *patend = (attempt < 2) ? NUL : '$'; /* add/remove '$' */
                p = pat;
                if (*p == '^' && !(attempt & 1))         /* add/remove '^' */
                    ++p;
                prog = vim_regcomp(p, p_magic ? RE_MAGIC : 0);
                if (prog == NULL)
                {
                    vim_free(pat);
                    return -1;
                }

                for (buf = firstbuf; buf != NULL; buf = buf->b_next)
                    if (buf->b_p_bl == find_listed
#ifdef FEAT_DIFF
                            && (!diffmode || diff_mode_buf(buf))
#endif
                            && buflist_match(prog, buf) != NULL)
                    {
                        if (match >= 0)         /* already found a match */
                        {
                            match = -2;
                            break;
                        }
                        match = buf->b_fnum;    /* remember first match */
                    }

                vim_free(prog);
                if (match >= 0)                 /* found one match */
                    break;
            }

            /* Only search for unlisted buffers if there was no match with
             * a listed buffer. */
            if (!unlisted || !find_listed || match != -1)
                break;
            find_listed = FALSE;
        }

        vim_free(pat);
    }

    if (match == -2)
        EMSG2(_("E93: More than one match for %s"), pattern);
    else if (match < 0)
        EMSG2(_("E94: No matching buffer for %s"), pattern);
    return match;
}
#endif

#if defined(FEAT_CMDL_COMPL) || defined(PROTO)

/*
 * Find all buffer names that match.
 * For command line expansion of ":buf" and ":sbuf".
 * Return OK if matches found, FAIL otherwise.
 */
    int
ExpandBufnames(pat, num_file, file, options)
    char_u      *pat;
    int         *num_file;
    char_u      ***file;
    int         options;
{
    int         count = 0;
    buf_T       *buf;
    int         round;
    char_u      *p;
    int         attempt;
    regprog_T   *prog;
    char_u      *patc;

    *num_file = 0;                  /* return values in case of FAIL */
    *file = NULL;

    /* Make a copy of "pat" and change "^" to "\(^\|[\/]\)". */
    if (*pat == '^')
    {
        patc = alloc((unsigned)STRLEN(pat) + 11);
        if (patc == NULL)
            return FAIL;
        STRCPY(patc, "\\(^\\|[\\/]\\)");
        STRCPY(patc + 11, pat + 1);
    }
    else
        patc = pat;

    /*
     * attempt == 0: try match with    '\<', match at start of word
     * attempt == 1: try match without '\<', match anywhere
     */
    for (attempt = 0; attempt <= 1; ++attempt)
    {
        if (attempt > 0 && patc == pat)
            break;      /* there was no anchor, no need to try again */
        prog = vim_regcomp(patc + attempt * 11, RE_MAGIC);
        if (prog == NULL)
        {
            if (patc != pat)
                vim_free(patc);
            return FAIL;
        }

        /*
         * round == 1: Count the matches.
         * round == 2: Build the array to keep the matches.
         */
        for (round = 1; round <= 2; ++round)
        {
            count = 0;
            for (buf = firstbuf; buf != NULL; buf = buf->b_next)
            {
                if (!buf->b_p_bl)       /* skip unlisted buffers */
                    continue;
                p = buflist_match(prog, buf);
                if (p != NULL)
                {
                    if (round == 1)
                        ++count;
                    else
                    {
                        if (options & WILD_HOME_REPLACE)
                            p = home_replace_save(buf, p);
                        else
                            p = vim_strsave(p);
                        (*file)[count++] = p;
                    }
                }
            }
            if (count == 0)     /* no match found, break here */
                break;
            if (round == 1)
            {
                *file = (char_u **)alloc((unsigned)(count * sizeof(char_u *)));
                if (*file == NULL)
                {
                    vim_free(prog);
                    if (patc != pat)
                        vim_free(patc);
                    return FAIL;
                }
            }
        }
        vim_free(prog);
        if (count)              /* match(es) found, break here */
            break;
    }

    if (patc != pat)
        vim_free(patc);

    *num_file = count;
    return (count == 0 ? FAIL : OK);
}

#endif /* FEAT_CMDL_COMPL */

#ifdef HAVE_BUFLIST_MATCH
/*
 * Check for a match on the file name for buffer "buf" with regprog "prog".
 */
    static char_u *
buflist_match(prog, buf)
    regprog_T   *prog;
    buf_T       *buf;
{
    char_u      *match;

    /* First try the short file name, then the long file name. */
    match = fname_match(prog, buf->b_sfname);
    if (match == NULL)
        match = fname_match(prog, buf->b_ffname);

    return match;
}

/*
 * Try matching the regexp in "prog" with file name "name".
 * Return "name" when there is a match, NULL when not.
 */
    static char_u *
fname_match(prog, name)
    regprog_T   *prog;
    char_u      *name;
{
    char_u      *match = NULL;
    char_u      *p;
    regmatch_T  regmatch;

    if (name != NULL)
    {
        regmatch.regprog = prog;
#ifdef CASE_INSENSITIVE_FILENAME
        regmatch.rm_ic = TRUE;          /* Always ignore case */
#else
        regmatch.rm_ic = FALSE;         /* Never ignore case */
#endif

        if (vim_regexec(&regmatch, name, (colnr_T)0))
            match = name;
        else
        {
            /* Replace $(HOME) with '~' and try matching again. */
            p = home_replace_save(NULL, name);
            if (p != NULL && vim_regexec(&regmatch, p, (colnr_T)0))
                match = name;
            vim_free(p);
        }
    }

    return match;
}
#endif

/*
 * find file in buffer list by number
 */
    buf_T *
buflist_findnr(nr)
    int         nr;
{
    buf_T       *buf;

    if (nr == 0)
        nr = curwin->w_alt_fnum;
    for (buf = firstbuf; buf != NULL; buf = buf->b_next)
        if (buf->b_fnum == nr)
            return (buf);
    return NULL;
}

/*
 * Get name of file 'n' in the buffer list.
 * When the file has no name an empty string is returned.
 * home_replace() is used to shorten the file name (used for marks).
 * Returns a pointer to allocated memory, of NULL when failed.
 */
    char_u *
buflist_nr2name(n, fullname, helptail)
    int         n;
    int         fullname;
    int         helptail;       /* for help buffers return tail only */
{
    buf_T       *buf;

    buf = buflist_findnr(n);
    if (buf == NULL)
        return NULL;
    return home_replace_save(helptail ? buf : NULL,
                                     fullname ? buf->b_ffname : buf->b_fname);
}

/*
 * Set the "lnum" and "col" for the buffer "buf" and the current window.
 * When "copy_options" is TRUE save the local window option values.
 * When "lnum" is 0 only do the options.
 */
    static void
buflist_setfpos(buf, win, lnum, col, copy_options)
    buf_T       *buf;
    win_T       *win;
    linenr_T    lnum;
    colnr_T     col;
    int         copy_options;
{
    wininfo_T   *wip;

    for (wip = buf->b_wininfo; wip != NULL; wip = wip->wi_next)
        if (wip->wi_win == win)
            break;
    if (wip == NULL)
    {
        /* allocate a new entry */
        wip = (wininfo_T *)alloc_clear((unsigned)sizeof(wininfo_T));
        if (wip == NULL)
            return;
        wip->wi_win = win;
        if (lnum == 0)          /* set lnum even when it's 0 */
            lnum = 1;
    }
    else
    {
        /* remove the entry from the list */
        if (wip->wi_prev)
            wip->wi_prev->wi_next = wip->wi_next;
        else
            buf->b_wininfo = wip->wi_next;
        if (wip->wi_next)
            wip->wi_next->wi_prev = wip->wi_prev;
        if (copy_options && wip->wi_optset)
        {
            clear_winopt(&wip->wi_opt);
#ifdef FEAT_FOLDING
            deleteFoldRecurse(&wip->wi_folds);
#endif
        }
    }
    if (lnum != 0)
    {
        wip->wi_fpos.lnum = lnum;
        wip->wi_fpos.col = col;
    }
    if (copy_options)
    {
        /* Save the window-specific option values. */
        copy_winopt(&win->w_onebuf_opt, &wip->wi_opt);
#ifdef FEAT_FOLDING
        wip->wi_fold_manual = win->w_fold_manual;
        cloneFoldGrowArray(&win->w_folds, &wip->wi_folds);
#endif
        wip->wi_optset = TRUE;
    }

    /* insert the entry in front of the list */
    wip->wi_next = buf->b_wininfo;
    buf->b_wininfo = wip;
    wip->wi_prev = NULL;
    if (wip->wi_next)
        wip->wi_next->wi_prev = wip;

    return;
}

/*
 * Find info for the current window in buffer "buf".
 * If not found, return the info for the most recently used window.
 * Returns NULL when there isn't any info.
 */
    static wininfo_T *
find_wininfo(buf)
    buf_T       *buf;
{
    wininfo_T   *wip;

    for (wip = buf->b_wininfo; wip != NULL; wip = wip->wi_next)
        if (wip->wi_win == curwin)
            break;
    if (wip == NULL)    /* if no fpos for curwin, use the first in the list */
        wip = buf->b_wininfo;
    return wip;
}

/*
 * Reset the local window options to the values last used in this window.
 * If the buffer wasn't used in this window before, use the values from
 * the most recently used window.  If the values were never set, use the
 * global values for the window.
 */
    void
get_winopts(buf)
    buf_T       *buf;
{
    wininfo_T   *wip;

    clear_winopt(&curwin->w_onebuf_opt);
#ifdef FEAT_FOLDING
    clearFolding(curwin);
#endif

    wip = find_wininfo(buf);
    if (wip != NULL && wip->wi_optset)
    {
        copy_winopt(&wip->wi_opt, &curwin->w_onebuf_opt);
#ifdef FEAT_FOLDING
        curwin->w_fold_manual = wip->wi_fold_manual;
        curwin->w_foldinvalid = TRUE;
        cloneFoldGrowArray(&wip->wi_folds, &curwin->w_folds);
#endif
    }
    else
        copy_winopt(&curwin->w_allbuf_opt, &curwin->w_onebuf_opt);

#ifdef FEAT_FOLDING
    /* Set 'foldlevel' to 'foldlevelstart' if it's not negative. */
    if (p_fdls >= 0)
        curwin->w_p_fdl = p_fdls;
#endif
}

/*
 * Find the position (lnum and col) for the buffer 'buf' for the current
 * window.
 * Returns a pointer to no_position if no position is found.
 */
    pos_T *
buflist_findfpos(buf)
    buf_T       *buf;
{
    wininfo_T   *wip;
    static pos_T no_position = {1, 0};

    wip = find_wininfo(buf);
    if (wip != NULL)
        return &(wip->wi_fpos);
    else
        return &no_position;
}

/*
 * Find the lnum for the buffer 'buf' for the current window.
 */
    linenr_T
buflist_findlnum(buf)
    buf_T       *buf;
{
    return buflist_findfpos(buf)->lnum;
}

#if defined(FEAT_LISTCMDS) || defined(PROTO)
/*
 * List all know file names (for :files and :buffers command).
 */
/*ARGSUSED*/
    void
buflist_list(eap)
    exarg_T     *eap;
{
    buf_T       *buf;
    int         len;
    int         i;

    for (buf = firstbuf; buf != NULL && !got_int; buf = buf->b_next)
    {
        /* skip unlisted buffers, unless ! was used */
        if (!buf->b_p_bl && !eap->forceit)
            continue;
        msg_putchar('\n');
        if (buf_spname(buf) != NULL)
            STRCPY(NameBuff, buf_spname(buf));
        else
            home_replace(buf, buf->b_fname, NameBuff, MAXPATHL, TRUE);

        len = vim_snprintf((char *)IObuff, IOSIZE - 20, "%3d%c%c%c%c%c \"%s\"",
                buf->b_fnum,
                buf->b_p_bl ? ' ' : 'u',
                buf == curbuf ? '%' :
                        (curwin->w_alt_fnum == buf->b_fnum ? '#' : ' '),
                buf->b_ml.ml_mfp == NULL ? ' ' :
                        (buf->b_nwindows == 0 ? 'h' : 'a'),
                !buf->b_p_ma ? '-' : (buf->b_p_ro ? '=' : ' '),
                (buf->b_flags & BF_READERR) ? 'x'
                                            : (bufIsChanged(buf) ? '+' : ' '),
                NameBuff);

        /* put "line 999" in column 40 or after the file name */
        i = 40 - vim_strsize(IObuff);
        do
        {
            IObuff[len++] = ' ';
        } while (--i > 0 && len < IOSIZE - 18);
        vim_snprintf((char *)IObuff + len, IOSIZE - len, _("line %ld"),
                buf == curbuf ? curwin->w_cursor.lnum
                                               : (long)buflist_findlnum(buf));
        msg_outtrans(IObuff);
        out_flush();        /* output one line at a time */
        ui_breakcheck();
    }
}
#endif

/*
 * Get file name and line number for file 'fnum'.
 * Used by DoOneCmd() for translating '%' and '#'.
 * Used by insert_reg() and cmdline_paste() for '#' register.
 * Return FAIL if not found, OK for success.
 */
    int
buflist_name_nr(fnum, fname, lnum)
    int         fnum;
    char_u      **fname;
    linenr_T    *lnum;
{
    buf_T       *buf;

    buf = buflist_findnr(fnum);
    if (buf == NULL || buf->b_fname == NULL)
        return FAIL;

    *fname = buf->b_fname;
    *lnum = buflist_findlnum(buf);

    return OK;
}

/*
 * Set the file name for "buf"' to 'ffname', short file name to 'sfname'.
 * The file name with the full path is also remembered, for when :cd is used.
 * Returns FAIL for failure (file name already in use by other buffer)
 *      OK otherwise.
 */
    int
setfname(buf, ffname, sfname, message)
    buf_T       *buf;
    char_u      *ffname, *sfname;
    int         message;        /* give message when buffer already exists */
{
    buf_T       *obuf = NULL;
#ifdef UNIX
    struct stat st;
#endif

    if (ffname == NULL || *ffname == NUL)
    {
        /* Removing the name. */
        vim_free(buf->b_ffname);
        vim_free(buf->b_sfname);
        buf->b_ffname = NULL;
        buf->b_sfname = NULL;
#ifdef UNIX
        st.st_dev = (dev_T)-1;
#endif
    }
    else
    {
        fname_expand(buf, &ffname, &sfname); /* will allocate ffname */
        if (ffname == NULL)                 /* out of memory */
            return FAIL;

        /*
         * if the file name is already used in another buffer:
         * - if the buffer is loaded, fail
         * - if the buffer is not loaded, delete it from the list
         */
#ifdef UNIX
        if (mch_stat((char *)ffname, &st) < 0)
            st.st_dev = (dev_T)-1;
#endif
        if (!(buf->b_flags & BF_DUMMY))
#ifdef UNIX
            obuf = buflist_findname_stat(ffname, &st);
#else
            obuf = buflist_findname(ffname);
#endif
        if (obuf != NULL && obuf != buf)
        {
            if (obuf->b_ml.ml_mfp != NULL)      /* it's loaded, fail */
            {
                if (message)
                    EMSG(_("E95: Buffer with this name already exists"));
                vim_free(ffname);
                return FAIL;
            }
            close_buffer(NULL, obuf, DOBUF_WIPE); /* delete from the list */
        }
        sfname = vim_strsave(sfname);
        if (ffname == NULL || sfname == NULL)
        {
            vim_free(sfname);
            vim_free(ffname);
            return FAIL;
        }
#ifdef USE_FNAME_CASE
# ifdef USE_LONG_FNAME
        if (USE_LONG_FNAME)
# endif
            fname_case(sfname, 0);    /* set correct case for short file name */
#endif
        vim_free(buf->b_ffname);
        vim_free(buf->b_sfname);
        buf->b_ffname = ffname;
        buf->b_sfname = sfname;
    }
    buf->b_fname = buf->b_sfname;
#ifdef UNIX
    if (st.st_dev == (dev_T)-1)
        buf->b_dev = -1;
    else
    {
        buf->b_dev = st.st_dev;
        buf->b_ino = st.st_ino;
    }
#endif

#ifndef SHORT_FNAME
    buf->b_shortname = FALSE;
#endif

    buf_name_changed(buf);
    return OK;
}

/*
 * Crude way of changing the name of a buffer.  Use with care!
 * The name should be relative to the current directory.
 */
    void
buf_set_name(fnum, name)
    int         fnum;
    char_u      *name;
{
    buf_T       *buf;

    buf = buflist_findnr(fnum);
    if (buf != NULL)
    {
        vim_free(buf->b_sfname);
        vim_free(buf->b_ffname);
        buf->b_ffname = vim_strsave(name);
        buf->b_sfname = NULL;
        /* Allocate ffname and expand into full path.  Also resolves .lnk
         * files on Win32. */
        fname_expand(buf, &buf->b_ffname, &buf->b_sfname);
        buf->b_fname = buf->b_sfname;
    }
}

/*
 * Take care of what needs to be done when the name of buffer "buf" has
 * changed.
 */
    void
buf_name_changed(buf)
    buf_T       *buf;
{
    /*
     * If the file name changed, also change the name of the swapfile
     */
    if (buf->b_ml.ml_mfp != NULL)
        ml_setname(buf);

    if (curwin->w_buffer == buf)
        check_arg_idx(curwin);  /* check file name for arg list */
#ifdef FEAT_TITLE
    maketitle();                /* set window title */
#endif
#ifdef FEAT_WINDOWS
    status_redraw_all();        /* status lines need to be redrawn */
#endif
    fmarks_check_names(buf);    /* check named file marks */
    ml_timestamp(buf);          /* reset timestamp */
}

/*
 * set alternate file name for current window
 *
 * Used by do_one_cmd(), do_write() and do_ecmd().
 * Return the buffer.
 */
    buf_T *
setaltfname(ffname, sfname, lnum)
    char_u      *ffname;
    char_u      *sfname;
    linenr_T    lnum;
{
    buf_T       *buf;

    /* Create a buffer.  'buflisted' is not set if it's a new buffer */
    buf = buflist_new(ffname, sfname, lnum, 0);
    if (buf != NULL && !cmdmod.keepalt)
        curwin->w_alt_fnum = buf->b_fnum;
    return buf;
}

/*
 * Get alternate file name for current window.
 * Return NULL if there isn't any, and give error message if requested.
 */
    char_u  *
getaltfname(errmsg)
    int         errmsg;         /* give error message */
{
    char_u      *fname;
    linenr_T    dummy;

    if (buflist_name_nr(0, &fname, &dummy) == FAIL)
    {
        if (errmsg)
            EMSG(_(e_noalt));
        return NULL;
    }
    return fname;
}

/*
 * Add a file name to the buflist and return its number.
 * Uses same flags as buflist_new(), except BLN_DUMMY.
 *
 * used by qf_init(), main() and doarglist()
 */
    int
buflist_add(fname, flags)
    char_u      *fname;
    int         flags;
{
    buf_T       *buf;

    buf = buflist_new(fname, NULL, (linenr_T)0, flags);
    if (buf != NULL)
        return buf->b_fnum;
    return 0;
}

#if defined(BACKSLASH_IN_FILENAME) || defined(PROTO)
/*
 * Adjust slashes in file names.  Called after 'shellslash' was set.
 */
    void
buflist_slash_adjust()
{
    buf_T       *bp;

    for (bp = firstbuf; bp != NULL; bp = bp->b_next)
    {
        if (bp->b_ffname != NULL)
            slash_adjust(bp->b_ffname);
        if (bp->b_sfname != NULL)
            slash_adjust(bp->b_sfname);
    }
}
#endif

/*
 * Set alternate cursor position for current window.
 * Also save the local window option values.
 */
    void
buflist_altfpos()
{
    buflist_setfpos(curbuf, curwin, curwin->w_cursor.lnum,
                                                  curwin->w_cursor.col, TRUE);
}

/*
 * Return TRUE if 'ffname' is not the same file as current file.
 * Fname must have a full path (expanded by mch_FullName()).
 */
    int
otherfile(ffname)
    char_u      *ffname;
{
    return otherfile_buf(curbuf, ffname
#ifdef UNIX
            , NULL
#endif
            );
}

    static int
otherfile_buf(buf, ffname
#ifdef UNIX
        , stp
#endif
        )
    buf_T       *buf;
    char_u      *ffname;
#ifdef UNIX
    struct stat *stp;
#endif
{
    /* no name is different */
    if (ffname == NULL || *ffname == NUL || buf->b_ffname == NULL)
        return TRUE;
    if (fnamecmp(ffname, buf->b_ffname) == 0)
        return FALSE;
#ifdef UNIX
    {
        struct stat     st;

        /* If no struct stat given, get it now */
        if (stp == NULL)
        {
            if (buf->b_dev < 0 || mch_stat((char *)ffname, &st) < 0)
                st.st_dev = (dev_T)-1;
            stp = &st;
        }
        /* Use dev/ino to check if the files are the same, even when the names
         * are different (possible with links).  Still need to compare the
         * name above, for when the file doesn't exist yet.
         * Problem: The dev/ino changes when a file is deleted (and created
         * again) and remains the same when renamed/moved.  We don't want to
         * mch_stat() each buffer each time, that would be too slow.  Get the
         * dev/ino again when they appear to match, but not when they appear
         * to be different: Could skip a buffer when it's actually the same
         * file. */
        if (buf_same_ino(buf, stp))
        {
            buf_setino(buf);
            if (buf_same_ino(buf, stp))
                return FALSE;
        }
    }
#endif
    return TRUE;
}

#if defined(UNIX) || defined(PROTO)
/*
 * Set inode and device number for a buffer.
 * Must always be called when b_fname is changed!.
 */
    void
buf_setino(buf)
    buf_T       *buf;
{
    struct stat st;

    if (buf->b_fname != NULL && mch_stat((char *)buf->b_fname, &st) >= 0)
    {
        buf->b_dev = st.st_dev;
        buf->b_ino = st.st_ino;
    }
    else
        buf->b_dev = -1;
}

/*
 * Return TRUE if dev/ino in buffer "buf" matches with "stp".
 */
    static int
buf_same_ino(buf, stp)
    buf_T       *buf;
    struct stat *stp;
{
    return (buf->b_dev >= 0
            && stp->st_dev == buf->b_dev
            && stp->st_ino == buf->b_ino);
}
#endif

/*
 * Print info about the current buffer.
 */
    void
fileinfo(fullname, shorthelp, dont_truncate)
    int fullname;           /* when non-zero print full path */
    int shorthelp;
    int dont_truncate;
{
    char_u      *name;
    int         n;
    char_u      *p;
    char_u      *buffer;
    size_t      len;

    buffer = alloc(IOSIZE);
    if (buffer == NULL)
        return;

    if (fullname > 1)       /* 2 CTRL-G: include buffer number */
    {
        sprintf((char *)buffer, "buf %d: ", curbuf->b_fnum);
        p = buffer + STRLEN(buffer);
    }
    else
        p = buffer;

    *p++ = '"';
    if (buf_spname(curbuf) != NULL)
        STRCPY(p, buf_spname(curbuf));
    else
    {
        if (!fullname && curbuf->b_fname != NULL)
            name = curbuf->b_fname;
        else
            name = curbuf->b_ffname;
        home_replace(shorthelp ? curbuf : NULL, name, p,
                                          (int)(IOSIZE - (p - buffer)), TRUE);
    }

    len = STRLEN(buffer);
    vim_snprintf((char *)buffer + len, IOSIZE - len,
            "\"%s%s%s%s%s%s",
            curbufIsChanged() ? (shortmess(SHM_MOD)
                                          ?  " [+]" : _(" [Modified]")) : " ",
            (curbuf->b_flags & BF_NOTEDITED)
#ifdef FEAT_QUICKFIX
                    && !bt_dontwrite(curbuf)
#endif
                                        ? _("[Not edited]") : "",
            (curbuf->b_flags & BF_NEW)
#ifdef FEAT_QUICKFIX
                    && !bt_dontwrite(curbuf)
#endif
                                        ? _("[New file]") : "",
            (curbuf->b_flags & BF_READERR) ? _("[Read errors]") : "",
            curbuf->b_p_ro ? (shortmess(SHM_RO) ? "[RO]"
                                                      : _("[readonly]")) : "",
            (curbufIsChanged() || (curbuf->b_flags & BF_WRITE_MASK)
                                                          || curbuf->b_p_ro) ?
                                                                    " " : "");
    /* With 32 bit longs and more than 21,474,836 lines multiplying by 100
     * causes an overflow, thus for large numbers divide instead. */
    if (curwin->w_cursor.lnum > 1000000L)
        n = (int)(((long)curwin->w_cursor.lnum) /
                                   ((long)curbuf->b_ml.ml_line_count / 100L));
    else
        n = (int)(((long)curwin->w_cursor.lnum * 100L) /
                                            (long)curbuf->b_ml.ml_line_count);
    len = STRLEN(buffer);
    if (curbuf->b_ml.ml_flags & ML_EMPTY)
    {
        vim_snprintf((char *)buffer + len, IOSIZE - len, "%s", _(no_lines_msg));
    }
#ifdef FEAT_CMDL_INFO
    else if (p_ru)
    {
        /* Current line and column are already on the screen -- webb */
        if (curbuf->b_ml.ml_line_count == 1)
            vim_snprintf((char *)buffer + len, IOSIZE - len,
                    _("1 line --%d%%--"), n);
        else
            vim_snprintf((char *)buffer + len, IOSIZE - len,
                    _("%ld lines --%d%%--"),
                                         (long)curbuf->b_ml.ml_line_count, n);
    }
#endif
    else
    {
        vim_snprintf((char *)buffer + len, IOSIZE - len,
                _("line %ld of %ld --%d%%-- col "),
                (long)curwin->w_cursor.lnum,
                (long)curbuf->b_ml.ml_line_count,
                n);
        validate_virtcol();
        col_print(buffer + STRLEN(buffer),
                   (int)curwin->w_cursor.col + 1, (int)curwin->w_virtcol + 1);
    }

    (void)append_arg_number(curwin, buffer, !shortmess(SHM_FILE), IOSIZE);

    if (dont_truncate)
    {
        /* Temporarily set msg_scroll to avoid the message being truncated.
         * First call msg_start() to get the message in the right place. */
        msg_start();
        n = msg_scroll;
        msg_scroll = TRUE;
        msg(buffer);
        msg_scroll = n;
    }
    else
    {
        p = msg_trunc_attr(buffer, FALSE, 0);
        if (restart_edit != 0 || (msg_scrolled && !need_wait_return))
            /* Need to repeat the message after redrawing when:
             * - When restart_edit is set (otherwise there will be a delay
             *   before redrawing).
             * - When the screen was scrolled but there is no wait-return
             *   prompt. */
            set_keep_msg(p, 0);
    }

    vim_free(buffer);
}

    void
col_print(buf, col, vcol)
    char_u  *buf;
    int     col;
    int     vcol;
{
    if (col == vcol)
        sprintf((char *)buf, "%d", col);
    else
        sprintf((char *)buf, "%d-%d", col, vcol);
}

#if defined(FEAT_TITLE) || defined(PROTO)
/*
 * put file name in title bar of window and in icon title
 */

static char_u *lasttitle = NULL;
static char_u *lasticon = NULL;

    void
maketitle()
{
    char_u      *p;
    char_u      *t_str = NULL;
    char_u      *i_name;
    char_u      *i_str = NULL;
    int         maxlen = 0;
    int         len;
    int         mustset;
    char_u      buf[IOSIZE];
    int         off;

    if (!redrawing())
    {
        /* Postpone updating the title when 'lazyredraw' is set. */
        need_maketitle = TRUE;
        return;
    }

    need_maketitle = FALSE;
    if (!p_title && !p_icon)
        return;

    if (p_title)
    {
        if (p_titlelen > 0)
        {
            maxlen = p_titlelen * Columns / 100;
            if (maxlen < 10)
                maxlen = 10;
        }

        t_str = buf;
        if (*p_titlestring != NUL)
        {
#ifdef FEAT_STL_OPT
            if (stl_syntax & STL_IN_TITLE)
            {
                int     use_sandbox = FALSE;
                int     save_called_emsg = called_emsg;

# ifdef FEAT_EVAL
                use_sandbox = was_set_insecurely((char_u *)"titlestring", 0);
# endif
                called_emsg = FALSE;
                build_stl_str_hl(curwin, t_str, sizeof(buf),
                                              p_titlestring, use_sandbox,
                                              0, maxlen, NULL, NULL);
                if (called_emsg)
                    set_string_option_direct((char_u *)"titlestring", -1,
                                           (char_u *)"", OPT_FREE, SID_ERROR);
                called_emsg |= save_called_emsg;
            }
            else
#endif
                t_str = p_titlestring;
        }
        else
        {
            /* format: "fname + (path) (1 of 2) - VIM" */

            if (curbuf->b_fname == NULL)
                STRCPY(buf, _("[No Name]"));
            else
            {
                p = transstr(gettail(curbuf->b_fname));
                vim_strncpy(buf, p, IOSIZE - 100);
                vim_free(p);
            }

            switch (bufIsChanged(curbuf)
                    + (curbuf->b_p_ro * 2)
                    + (!curbuf->b_p_ma * 4))
            {
                case 1: STRCAT(buf, " +"); break;
                case 2: STRCAT(buf, " ="); break;
                case 3: STRCAT(buf, " =+"); break;
                case 4:
                case 6: STRCAT(buf, " -"); break;
                case 5:
                case 7: STRCAT(buf, " -+"); break;
            }

            if (curbuf->b_fname != NULL)
            {
                /* Get path of file, replace home dir with ~ */
                off = (int)STRLEN(buf);
                buf[off++] = ' ';
                buf[off++] = '(';
                home_replace(curbuf, curbuf->b_ffname,
                                               buf + off, IOSIZE - off, TRUE);
#ifdef BACKSLASH_IN_FILENAME
                /* avoid "c:/name" to be reduced to "c" */
                if (isalpha(buf[off]) && buf[off + 1] == ':')
                    off += 2;
#endif
                /* remove the file name */
                p = gettail_sep(buf + off);
                if (p == buf + off)
                    /* must be a help buffer */
                    vim_strncpy(buf + off, (char_u *)_("help"),
                                                            IOSIZE - off - 1);
                else
                    *p = NUL;

                /* translate unprintable chars */
                p = transstr(buf + off);
                vim_strncpy(buf + off, p, IOSIZE - off - 1);
                vim_free(p);
                STRCAT(buf, ")");
            }

            append_arg_number(curwin, buf, FALSE, IOSIZE);

#if defined(FEAT_CLIENTSERVER)
            if (serverName != NULL)
            {
                STRCAT(buf, " - ");
                STRCAT(buf, serverName);
            }
            else
#endif
                STRCAT(buf, " - VIM");

            if (maxlen > 0)
            {
                /* make it shorter by removing a bit in the middle */
                len = vim_strsize(buf);
                if (len > maxlen)
                    trunc_string(buf, buf, maxlen);
            }
        }
    }
    mustset = ti_change(t_str, &lasttitle);

    if (p_icon)
    {
        i_str = buf;
        if (*p_iconstring != NUL)
        {
#ifdef FEAT_STL_OPT
            if (stl_syntax & STL_IN_ICON)
            {
                int     use_sandbox = FALSE;
                int     save_called_emsg = called_emsg;

# ifdef FEAT_EVAL
                use_sandbox = was_set_insecurely((char_u *)"iconstring", 0);
# endif
                called_emsg = FALSE;
                build_stl_str_hl(curwin, i_str, sizeof(buf),
                                                    p_iconstring, use_sandbox,
                                                    0, 0, NULL, NULL);
                if (called_emsg)
                    set_string_option_direct((char_u *)"iconstring", -1,
                                           (char_u *)"", OPT_FREE, SID_ERROR);
                called_emsg |= save_called_emsg;
            }
            else
#endif
                i_str = p_iconstring;
        }
        else
        {
            if (buf_spname(curbuf) != NULL)
                i_name = (char_u *)buf_spname(curbuf);
            else                    /* use file name only in icon */
                i_name = gettail(curbuf->b_ffname);
            *i_str = NUL;
            /* Truncate name at 100 bytes. */
            len = (int)STRLEN(i_name);
            if (len > 100)
            {
                len -= 100;
#ifdef FEAT_MBYTE
                if (has_mbyte)
                    len += (*mb_tail_off)(i_name, i_name + len) + 1;
#endif
                i_name += len;
            }
            STRCPY(i_str, i_name);
            trans_characters(i_str, IOSIZE);
        }
    }

    mustset |= ti_change(i_str, &lasticon);

    if (mustset)
        resettitle();
}

/*
 * Used for title and icon: Check if "str" differs from "*last".  Set "*last"
 * from "str" if it does.
 * Return TRUE when "*last" changed.
 */
    static int
ti_change(str, last)
    char_u      *str;
    char_u      **last;
{
    if ((str == NULL) != (*last == NULL)
            || (str != NULL && *last != NULL && STRCMP(str, *last) != 0))
    {
        vim_free(*last);
        if (str == NULL)
            *last = NULL;
        else
            *last = vim_strsave(str);
        return TRUE;
    }
    return FALSE;
}

/*
 * Put current window title back (used after calling a shell)
 */
    void
resettitle()
{
    mch_settitle(lasttitle, lasticon);
}

# if defined(EXITFREE) || defined(PROTO)
    void
free_titles()
{
    vim_free(lasttitle);
    vim_free(lasticon);
}
# endif

#endif /* FEAT_TITLE */

#if defined(FEAT_STL_OPT) || defined(FEAT_GUI_TABLINE) || defined(PROTO)
/*
 * Build a string from the status line items in "fmt".
 * Return length of string in screen cells.
 *
 * Normally works for window "wp", except when working for 'tabline' then it
 * is "curwin".
 *
 * Items are drawn interspersed with the text that surrounds it
 * Specials: %-<wid>(xxx%) => group, %= => middle marker, %< => truncation
 * Item: %-<minwid>.<maxwid><itemch> All but <itemch> are optional
 *
 * If maxwidth is not zero, the string will be filled at any middle marker
 * or truncated if too long, fillchar is used for all whitespace.
 */
/*ARGSUSED*/
    int
build_stl_str_hl(wp, out, outlen, fmt, use_sandbox, fillchar, maxwidth, hltab, tabtab)
    win_T       *wp;
    char_u      *out;           /* buffer to write into != NameBuff */
    size_t      outlen;         /* length of out[] */
    char_u      *fmt;
    int         use_sandbox;    /* "fmt" was set insecurely, use sandbox */
    int         fillchar;
    int         maxwidth;
    struct stl_hlrec *hltab;    /* return: HL attributes (can be NULL) */
    struct stl_hlrec *tabtab;   /* return: tab page nrs (can be NULL) */
{
    char_u      *p;
    char_u      *s;
    char_u      *t;
    char_u      *linecont;
#ifdef FEAT_EVAL
    win_T       *o_curwin;
    buf_T       *o_curbuf;
#endif
    int         empty_line;
    colnr_T     virtcol;
    long        l;
    long        n;
    int         prevchar_isflag;
    int         prevchar_isitem;
    int         itemisflag;
    int         fillable;
    char_u      *str;
    long        num;
    int         width;
    int         itemcnt;
    int         curitem;
    int         groupitem[STL_MAX_ITEM];
    int         groupdepth;
    struct stl_item
    {
        char_u          *start;
        int             minwid;
        int             maxwid;
        enum
        {
            Normal,
            Empty,
            Group,
            Middle,
            Highlight,
            TabPage,
            Trunc
        }               type;
    }           item[STL_MAX_ITEM];
    int         minwid;
    int         maxwid;
    int         zeropad;
    char_u      base;
    char_u      opt;
#define TMPLEN 70
    char_u      tmp[TMPLEN];
    char_u      *usefmt = fmt;
    struct stl_hlrec *sp;

#ifdef FEAT_EVAL
    /*
     * When the format starts with "%!" then evaluate it as an expression and
     * use the result as the actual format string.
     */
    if (fmt[0] == '%' && fmt[1] == '!')
    {
        usefmt = eval_to_string_safe(fmt + 2, NULL, use_sandbox);
        if (usefmt == NULL)
            usefmt = fmt;
    }
#endif

    if (fillchar == 0)
        fillchar = ' ';
#ifdef FEAT_MBYTE
    /* Can't handle a multi-byte fill character yet. */
    else if (mb_char2len(fillchar) > 1)
        fillchar = '-';
#endif

    /*
     * Get line & check if empty (cursorpos will show "0-1").
     * If inversion is possible we use it. Else '=' characters are used.
     */
    linecont = ml_get_buf(wp->w_buffer, wp->w_cursor.lnum, FALSE);
    empty_line = (*linecont == NUL);

    groupdepth = 0;
    p = out;
    curitem = 0;
    prevchar_isflag = TRUE;
    prevchar_isitem = FALSE;
    for (s = usefmt; *s; )
    {
        if (*s != NUL && *s != '%')
            prevchar_isflag = prevchar_isitem = FALSE;

        /*
         * Handle up to the next '%' or the end.
         */
        while (*s != NUL && *s != '%' && p + 1 < out + outlen)
            *p++ = *s++;
        if (*s == NUL || p + 1 >= out + outlen)
            break;

        /*
         * Handle one '%' item.
         */
        s++;
        if (*s == '%')
        {
            if (p + 1 >= out + outlen)
                break;
            *p++ = *s++;
            prevchar_isflag = prevchar_isitem = FALSE;
            continue;
        }
        if (*s == STL_MIDDLEMARK)
        {
            s++;
            if (groupdepth > 0)
                continue;
            item[curitem].type = Middle;
            item[curitem++].start = p;
            continue;
        }
        if (*s == STL_TRUNCMARK)
        {
            s++;
            item[curitem].type = Trunc;
            item[curitem++].start = p;
            continue;
        }
        if (*s == ')')
        {
            s++;
            if (groupdepth < 1)
                continue;
            groupdepth--;

            t = item[groupitem[groupdepth]].start;
            *p = NUL;
            l = vim_strsize(t);
            if (curitem > groupitem[groupdepth] + 1
                    && item[groupitem[groupdepth]].minwid == 0)
            {
                /* remove group if all items are empty */
                for (n = groupitem[groupdepth] + 1; n < curitem; n++)
                    if (item[n].type == Normal)
                        break;
                if (n == curitem)
                {
                    p = t;
                    l = 0;
                }
            }
            if (l > item[groupitem[groupdepth]].maxwid)
            {
                /* truncate, remove n bytes of text at the start */
#ifdef FEAT_MBYTE
                if (has_mbyte)
                {
                    /* Find the first character that should be included. */
                    n = 0;
                    while (l >= item[groupitem[groupdepth]].maxwid)
                    {
                        l -= ptr2cells(t + n);
                        n += (*mb_ptr2len)(t + n);
                    }
                }
                else
#endif
                    n = (long)(p - t) - item[groupitem[groupdepth]].maxwid + 1;

                *t = '<';
                mch_memmove(t + 1, t + n, p - (t + n));
                p = p - n + 1;
#ifdef FEAT_MBYTE
                /* Fill up space left over by half a double-wide char. */
                while (++l < item[groupitem[groupdepth]].minwid)
                    *p++ = fillchar;
#endif

                /* correct the start of the items for the truncation */
                for (l = groupitem[groupdepth] + 1; l < curitem; l++)
                {
                    item[l].start -= n;
                    if (item[l].start < t)
                        item[l].start = t;
                }
            }
            else if (abs(item[groupitem[groupdepth]].minwid) > l)
            {
                /* fill */
                n = item[groupitem[groupdepth]].minwid;
                if (n < 0)
                {
                    /* fill by appending characters */
                    n = 0 - n;
                    while (l++ < n && p + 1 < out + outlen)
                        *p++ = fillchar;
                }
                else
                {
                    /* fill by inserting characters */
                    mch_memmove(t + n - l, t, p - t);
                    l = n - l;
                    if (p + l >= out + outlen)
                        l = (long)((out + outlen) - p - 1);
                    p += l;
                    for (n = groupitem[groupdepth] + 1; n < curitem; n++)
                        item[n].start += l;
                    for ( ; l > 0; l--)
                        *t++ = fillchar;
                }
            }
            continue;
        }
        minwid = 0;
        maxwid = 9999;
        zeropad = FALSE;
        l = 1;
        if (*s == '0')
        {
            s++;
            zeropad = TRUE;
        }
        if (*s == '-')
        {
            s++;
            l = -1;
        }
        if (VIM_ISDIGIT(*s))
        {
            minwid = (int)getdigits(&s);
            if (minwid < 0)     /* overflow */
                minwid = 0;
        }
        if (*s == STL_USER_HL)
        {
            item[curitem].type = Highlight;
            item[curitem].start = p;
            item[curitem].minwid = minwid > 9 ? 1 : minwid;
            s++;
            curitem++;
            continue;
        }
        if (*s == STL_TABPAGENR || *s == STL_TABCLOSENR)
        {
            if (*s == STL_TABCLOSENR)
            {
                if (minwid == 0)
                {
                    /* %X ends the close label, go back to the previously
                     * define tab label nr. */
                    for (n = curitem - 1; n >= 0; --n)
                        if (item[n].type == TabPage && item[n].minwid >= 0)
                        {
                            minwid = item[n].minwid;
                            break;
                        }
                }
                else
                    /* close nrs are stored as negative values */
                    minwid = - minwid;
            }
            item[curitem].type = TabPage;
            item[curitem].start = p;
            item[curitem].minwid = minwid;
            s++;
            curitem++;
            continue;
        }
        if (*s == '.')
        {
            s++;
            if (VIM_ISDIGIT(*s))
            {
                maxwid = (int)getdigits(&s);
                if (maxwid <= 0)        /* overflow */
                    maxwid = 50;
            }
        }
        minwid = (minwid > 50 ? 50 : minwid) * l;
        if (*s == '(')
        {
            groupitem[groupdepth++] = curitem;
            item[curitem].type = Group;
            item[curitem].start = p;
            item[curitem].minwid = minwid;
            item[curitem].maxwid = maxwid;
            s++;
            curitem++;
            continue;
        }
        if (vim_strchr(STL_ALL, *s) == NULL)
        {
            s++;
            continue;
        }
        opt = *s++;

        /* OK - now for the real work */
        base = 'D';
        itemisflag = FALSE;
        fillable = TRUE;
        num = -1;
        str = NULL;
        switch (opt)
        {
        case STL_FILEPATH:
        case STL_FULLPATH:
        case STL_FILENAME:
            fillable = FALSE;   /* don't change ' ' to fillchar */
            if (buf_spname(wp->w_buffer) != NULL)
                STRCPY(NameBuff, buf_spname(wp->w_buffer));
            else
            {
                t = (opt == STL_FULLPATH) ? wp->w_buffer->b_ffname
                                          : wp->w_buffer->b_fname;
                home_replace(wp->w_buffer, t, NameBuff, MAXPATHL, TRUE);
            }
            trans_characters(NameBuff, MAXPATHL);
            if (opt != STL_FILENAME)
                str = NameBuff;
            else
                str = gettail(NameBuff);
            break;

        case STL_VIM_EXPR: /* '{' */
            itemisflag = TRUE;
            t = p;
            while (*s != '}' && *s != NUL && p + 1 < out + outlen)
                *p++ = *s++;
            if (*s != '}')      /* missing '}' or out of space */
                break;
            s++;
            *p = 0;
            p = t;

#ifdef FEAT_EVAL
            sprintf((char *)tmp, "%d", curbuf->b_fnum);
            set_internal_string_var((char_u *)"actual_curbuf", tmp);

            o_curbuf = curbuf;
            o_curwin = curwin;
            curwin = wp;
            curbuf = wp->w_buffer;

            str = eval_to_string_safe(p, &t, use_sandbox);

            curwin = o_curwin;
            curbuf = o_curbuf;
            do_unlet((char_u *)"g:actual_curbuf", TRUE);

            if (str != NULL && *str != 0)
            {
                if (*skipdigits(str) == NUL)
                {
                    num = atoi((char *)str);
                    vim_free(str);
                    str = NULL;
                    itemisflag = FALSE;
                }
            }
#endif
            break;

        case STL_LINE:
            num = (wp->w_buffer->b_ml.ml_flags & ML_EMPTY)
                  ? 0L : (long)(wp->w_cursor.lnum);
            break;

        case STL_NUMLINES:
            num = wp->w_buffer->b_ml.ml_line_count;
            break;

        case STL_COLUMN:
            num = !(State & INSERT) && empty_line
                  ? 0 : (int)wp->w_cursor.col + 1;
            break;

        case STL_VIRTCOL:
        case STL_VIRTCOL_ALT:
            /* In list mode virtcol needs to be recomputed */
            virtcol = wp->w_virtcol;
            if (wp->w_p_list && lcs_tab1 == NUL)
            {
                wp->w_p_list = FALSE;
                getvcol(wp, &wp->w_cursor, NULL, &virtcol, NULL);
                wp->w_p_list = TRUE;
            }
            ++virtcol;
            /* Don't display %V if it's the same as %c. */
            if (opt == STL_VIRTCOL_ALT
                    && (virtcol == (colnr_T)(!(State & INSERT) && empty_line
                            ? 0 : (int)wp->w_cursor.col + 1)))
                break;
            num = (long)virtcol;
            break;

        case STL_PERCENTAGE:
            num = (int)(((long)wp->w_cursor.lnum * 100L) /
                        (long)wp->w_buffer->b_ml.ml_line_count);
            break;

        case STL_ALTPERCENT:
            str = tmp;
            get_rel_pos(wp, str);
            break;

        case STL_ARGLISTSTAT:
            fillable = FALSE;
            tmp[0] = 0;
            if (append_arg_number(wp, tmp, FALSE, (int)sizeof(tmp)))
                str = tmp;
            break;

        case STL_KEYMAP:
            fillable = FALSE;
            if (get_keymap_str(wp, tmp, TMPLEN))
                str = tmp;
            break;
        case STL_PAGENUM:
#if defined(FEAT_PRINTER) || defined(FEAT_GUI_TABLINE)
            num = printer_page_num;
#else
            num = 0;
#endif
            break;

        case STL_BUFNO:
            num = wp->w_buffer->b_fnum;
            break;

        case STL_OFFSET_X:
            base = 'X';
        case STL_OFFSET:
#ifdef FEAT_BYTEOFF
            l = ml_find_line_or_offset(wp->w_buffer, wp->w_cursor.lnum, NULL);
            num = (wp->w_buffer->b_ml.ml_flags & ML_EMPTY) || l < 0 ?
                  0L : l + 1 + (!(State & INSERT) && empty_line ?
                                0 : (int)wp->w_cursor.col);
#endif
            break;

        case STL_BYTEVAL_X:
            base = 'X';
        case STL_BYTEVAL:
            if (wp->w_cursor.col > STRLEN(linecont))
                num = 0;
            else
            {
#ifdef FEAT_MBYTE
                num = (*mb_ptr2char)(linecont + wp->w_cursor.col);
#else
                num = linecont[wp->w_cursor.col];
#endif
            }
            if (num == NL)
                num = 0;
            else if (num == CAR && get_fileformat(wp->w_buffer) == EOL_MAC)
                num = NL;
            break;

        case STL_ROFLAG:
        case STL_ROFLAG_ALT:
            itemisflag = TRUE;
            if (wp->w_buffer->b_p_ro)
                str = (char_u *)((opt == STL_ROFLAG_ALT) ? ",RO" : "[RO]");
            break;

        case STL_HELPFLAG:
        case STL_HELPFLAG_ALT:
            itemisflag = TRUE;
            if (wp->w_buffer->b_help)
                str = (char_u *)((opt == STL_HELPFLAG_ALT) ? ",HLP"
                                                               : _("[Help]"));
            break;

#ifdef FEAT_AUTOCMD
        case STL_FILETYPE:
            if (*wp->w_buffer->b_p_ft != NUL
                    && STRLEN(wp->w_buffer->b_p_ft) < TMPLEN - 3)
            {
                vim_snprintf((char *)tmp, sizeof(tmp), "[%s]",
                                                        wp->w_buffer->b_p_ft);
                str = tmp;
            }
            break;

        case STL_FILETYPE_ALT:
            itemisflag = TRUE;
            if (*wp->w_buffer->b_p_ft != NUL
                    && STRLEN(wp->w_buffer->b_p_ft) < TMPLEN - 2)
            {
                vim_snprintf((char *)tmp, sizeof(tmp), ",%s",
                                                        wp->w_buffer->b_p_ft);
                for (t = tmp; *t != 0; t++)
                    *t = TOUPPER_LOC(*t);
                str = tmp;
            }
            break;
#endif

#if defined(FEAT_WINDOWS) && defined(FEAT_QUICKFIX)
        case STL_PREVIEWFLAG:
        case STL_PREVIEWFLAG_ALT:
            itemisflag = TRUE;
            if (wp->w_p_pvw)
                str = (char_u *)((opt == STL_PREVIEWFLAG_ALT) ? ",PRV"
                                                            : _("[Preview]"));
            break;
#endif

        case STL_MODIFIED:
        case STL_MODIFIED_ALT:
            itemisflag = TRUE;
            switch ((opt == STL_MODIFIED_ALT)
                    + bufIsChanged(wp->w_buffer) * 2
                    + (!wp->w_buffer->b_p_ma) * 4)
            {
                case 2: str = (char_u *)"[+]"; break;
                case 3: str = (char_u *)",+"; break;
                case 4: str = (char_u *)"[-]"; break;
                case 5: str = (char_u *)",-"; break;
                case 6: str = (char_u *)"[+-]"; break;
                case 7: str = (char_u *)",+-"; break;
            }
            break;

        case STL_HIGHLIGHT:
            t = s;
            while (*s != '#' && *s != NUL)
                ++s;
            if (*s == '#')
            {
                item[curitem].type = Highlight;
                item[curitem].start = p;
                item[curitem].minwid = -syn_namen2id(t, (int)(s - t));
                curitem++;
            }
            ++s;
            continue;
        }

        item[curitem].start = p;
        item[curitem].type = Normal;
        if (str != NULL && *str)
        {
            t = str;
            if (itemisflag)
            {
                if ((t[0] && t[1])
                        && ((!prevchar_isitem && *t == ',')
                              || (prevchar_isflag && *t == ' ')))
                    t++;
                prevchar_isflag = TRUE;
            }
            l = vim_strsize(t);
            if (l > 0)
                prevchar_isitem = TRUE;
            if (l > maxwid)
            {
                while (l >= maxwid)
#ifdef FEAT_MBYTE
                    if (has_mbyte)
                    {
                        l -= ptr2cells(t);
                        t += (*mb_ptr2len)(t);
                    }
                    else
#endif
                        l -= byte2cells(*t++);
                if (p + 1 >= out + outlen)
                    break;
                *p++ = '<';
            }
            if (minwid > 0)
            {
                for (; l < minwid && p + 1 < out + outlen; l++)
                {
                    /* Don't put a "-" in front of a digit. */
                    if (l + 1 == minwid && fillchar == '-' && VIM_ISDIGIT(*t))
                        *p++ = ' ';
                    else
                        *p++ = fillchar;
                }
                minwid = 0;
            }
            else
                minwid *= -1;
            while (*t && p + 1 < out + outlen)
            {
                *p++ = *t++;
                /* Change a space by fillchar, unless fillchar is '-' and a
                 * digit follows. */
                if (fillable && p[-1] == ' '
                                     && (!VIM_ISDIGIT(*t) || fillchar != '-'))
                    p[-1] = fillchar;
            }
            for (; l < minwid && p + 1 < out + outlen; l++)
                *p++ = fillchar;
        }
        else if (num >= 0)
        {
            int nbase = (base == 'D' ? 10 : (base == 'O' ? 8 : 16));
            char_u nstr[20];

            if (p + 20 >= out + outlen)
                break;          /* not sufficient space */
            prevchar_isitem = TRUE;
            t = nstr;
            if (opt == STL_VIRTCOL_ALT)
            {
                *t++ = '-';
                minwid--;
            }
            *t++ = '%';
            if (zeropad)
                *t++ = '0';
            *t++ = '*';
            *t++ = nbase == 16 ? base : (nbase == 8 ? 'o' : 'd');
            *t = 0;

            for (n = num, l = 1; n >= nbase; n /= nbase)
                l++;
            if (opt == STL_VIRTCOL_ALT)
                l++;
            if (l > maxwid)
            {
                l += 2;
                n = l - maxwid;
                while (l-- > maxwid)
                    num /= nbase;
                *t++ = '>';
                *t++ = '%';
                *t = t[-3];
                *++t = 0;
                vim_snprintf((char *)p, outlen - (p - out), (char *)nstr,
                                                                   0, num, n);
            }
            else
                vim_snprintf((char *)p, outlen - (p - out), (char *)nstr,
                                                                 minwid, num);
            p += STRLEN(p);
        }
        else
            item[curitem].type = Empty;

        if (opt == STL_VIM_EXPR)
            vim_free(str);

        if (num >= 0 || (!itemisflag && str && *str))
            prevchar_isflag = FALSE;        /* Item not NULL, but not a flag */
        curitem++;
    }
    *p = NUL;
    itemcnt = curitem;

#ifdef FEAT_EVAL
    if (usefmt != fmt)
        vim_free(usefmt);
#endif

    width = vim_strsize(out);
    if (maxwidth > 0 && width > maxwidth)
    {
        /* Result is too long, must trunctate somewhere. */
        l = 0;
        if (itemcnt == 0)
            s = out;
        else
        {
            for ( ; l < itemcnt; l++)
                if (item[l].type == Trunc)
                {
                    /* Truncate at %< item. */
                    s = item[l].start;
                    break;
                }
            if (l == itemcnt)
            {
                /* No %< item, truncate first item. */
                s = item[0].start;
                l = 0;
            }
        }

        if (width - vim_strsize(s) >= maxwidth)
        {
            /* Truncation mark is beyond max length */
#ifdef FEAT_MBYTE
            if (has_mbyte)
            {
                s = out;
                width = 0;
                for (;;)
                {
                    width += ptr2cells(s);
                    if (width >= maxwidth)
                        break;
                    s += (*mb_ptr2len)(s);
                }
                /* Fill up for half a double-wide character. */
                while (++width < maxwidth)
                    *s++ = fillchar;
            }
            else
#endif
                s = out + maxwidth - 1;
            for (l = 0; l < itemcnt; l++)
                if (item[l].start > s)
                    break;
            itemcnt = l;
            *s++ = '>';
            *s = 0;
        }
        else
        {
#ifdef FEAT_MBYTE
            if (has_mbyte)
            {
                n = 0;
                while (width >= maxwidth)
                {
                    width -= ptr2cells(s + n);
                    n += (*mb_ptr2len)(s + n);
                }
            }
            else
#endif
                n = width - maxwidth + 1;
            p = s + n;
            STRMOVE(s + 1, p);
            *s = '<';

            /* Fill up for half a double-wide character. */
            while (++width < maxwidth)
            {
                s = s + STRLEN(s);
                *s++ = fillchar;
                *s = NUL;
            }

            --n;        /* count the '<' */
            for (; l < itemcnt; l++)
            {
                if (item[l].start - n >= s)
                    item[l].start -= n;
                else
                    item[l].start = s;
            }
        }
        width = maxwidth;
    }
    else if (width < maxwidth && STRLEN(out) + maxwidth - width + 1 < outlen)
    {
        /* Apply STL_MIDDLE if any */
        for (l = 0; l < itemcnt; l++)
            if (item[l].type == Middle)
                break;
        if (l < itemcnt)
        {
            p = item[l].start + maxwidth - width;
            STRMOVE(p, item[l].start);
            for (s = item[l].start; s < p; s++)
                *s = fillchar;
            for (l++; l < itemcnt; l++)
                item[l].start += maxwidth - width;
            width = maxwidth;
        }
    }

    /* Store the info about highlighting. */
    if (hltab != NULL)
    {
        sp = hltab;
        for (l = 0; l < itemcnt; l++)
        {
            if (item[l].type == Highlight)
            {
                sp->start = item[l].start;
                sp->userhl = item[l].minwid;
                sp++;
            }
        }
        sp->start = NULL;
        sp->userhl = 0;
    }

    /* Store the info about tab pages labels. */
    if (tabtab != NULL)
    {
        sp = tabtab;
        for (l = 0; l < itemcnt; l++)
        {
            if (item[l].type == TabPage)
            {
                sp->start = item[l].start;
                sp->userhl = item[l].minwid;
                sp++;
            }
        }
        sp->start = NULL;
        sp->userhl = 0;
    }

    return width;
}
#endif /* FEAT_STL_OPT */

#if defined(FEAT_STL_OPT) || defined(FEAT_CMDL_INFO) \
            || defined(FEAT_GUI_TABLINE) || defined(PROTO)
/*
 * Get relative cursor position in window into "str[]", in the form 99%, using
 * "Top", "Bot" or "All" when appropriate.
 */
    void
get_rel_pos(wp, str)
    win_T       *wp;
    char_u      *str;
{
    long        above; /* number of lines above window */
    long        below; /* number of lines below window */

    above = wp->w_topline - 1;
#ifdef FEAT_DIFF
    above += diff_check_fill(wp, wp->w_topline) - wp->w_topfill;
#endif
    below = wp->w_buffer->b_ml.ml_line_count - wp->w_botline + 1;
    if (below <= 0)
        STRCPY(str, above == 0 ? _("All") : _("Bot"));
    else if (above <= 0)
        STRCPY(str, _("Top"));
    else
        sprintf((char *)str, "%2d%%", above > 1000000L
                                    ? (int)(above / ((above + below) / 100L))
                                    : (int)(above * 100L / (above + below)));
}
#endif

/*
 * Append (file 2 of 8) to 'buf', if editing more than one file.
 * Return TRUE if it was appended.
 */
    int
append_arg_number(wp, buf, add_file, maxlen)
    win_T       *wp;
    char_u      *buf;
    int         add_file;       /* Add "file" before the arg number */
    int         maxlen;         /* maximum nr of chars in buf or zero*/
{
    char_u      *p;

    if (ARGCOUNT <= 1)          /* nothing to do */
        return FALSE;

    p = buf + STRLEN(buf);              /* go to the end of the buffer */
    if (maxlen && p - buf + 35 >= maxlen) /* getting too long */
        return FALSE;
    *p++ = ' ';
    *p++ = '(';
    if (add_file)
    {
        STRCPY(p, "file ");
        p += 5;
    }
    sprintf((char *)p, wp->w_arg_idx_invalid ? "(%d) of %d)"
                                  : "%d of %d)", wp->w_arg_idx + 1, ARGCOUNT);
    return TRUE;
}

/*
 * If fname is not a full path, make it a full path.
 * Returns pointer to allocated memory (NULL for failure).
 */
    char_u  *
fix_fname(fname)
    char_u  *fname;
{
    /*
     * Force expanding the path always for Unix, because symbolic links may
     * mess up the full path name, even though it starts with a '/'.
     * Also expand when there is ".." in the file name, try to remove it,
     * because "c:/src/../README" is equal to "c:/README".
     * Similarly "c:/src//file" is equal to "c:/src/file".
     * For MS-Windows also expand names like "longna~1" to "longname".
     */
#ifdef UNIX
    return FullName_save(fname, TRUE);
#else
    if (!vim_isAbsName(fname)
            || strstr((char *)fname, "..") != NULL
            || strstr((char *)fname, "//") != NULL
# ifdef BACKSLASH_IN_FILENAME
            || strstr((char *)fname, "\\\\") != NULL
# endif
# if defined(MSWIN) || defined(DJGPP)
            || vim_strchr(fname, '~') != NULL
# endif
            )
        return FullName_save(fname, FALSE);

    fname = vim_strsave(fname);

# ifdef USE_FNAME_CASE
#  ifdef USE_LONG_FNAME
    if (USE_LONG_FNAME)
#  endif
    {
        if (fname != NULL)
            fname_case(fname, 0);       /* set correct case for file name */
    }
# endif

    return fname;
#endif
}

/*
 * Make "ffname" a full file name, set "sfname" to "ffname" if not NULL.
 * "ffname" becomes a pointer to allocated memory (or NULL).
 */
/*ARGSUSED*/
    void
fname_expand(buf, ffname, sfname)
    buf_T       *buf;
    char_u      **ffname;
    char_u      **sfname;
{
    if (*ffname == NULL)        /* if no file name given, nothing to do */
        return;
    if (*sfname == NULL)        /* if no short file name given, use ffname */
        *sfname = *ffname;
    *ffname = fix_fname(*ffname);   /* expand to full path */

#ifdef FEAT_SHORTCUT
    if (!buf->b_p_bin)
    {
        char_u  *rfname;

        /* If the file name is a shortcut file, use the file it links to. */
        rfname = mch_resolve_shortcut(*ffname);
        if (rfname != NULL)
        {
            vim_free(*ffname);
            *ffname = rfname;
            *sfname = rfname;
        }
    }
#endif
}

/*
 * Get the file name for an argument list entry.
 */
    char_u *
alist_name(aep)
    aentry_T    *aep;
{
    buf_T       *bp;

    /* Use the name from the associated buffer if it exists. */
    bp = buflist_findnr(aep->ae_fnum);
    if (bp == NULL || bp->b_fname == NULL)
        return aep->ae_fname;
    return bp->b_fname;
}

#if defined(FEAT_WINDOWS) || defined(PROTO)
/*
 * do_arg_all(): Open up to 'count' windows, one for each argument.
 */
    void
do_arg_all(count, forceit, keep_tabs)
    int count;
    int forceit;                /* hide buffers in current windows */
    int keep_tabs;              /* keep current tabs, for ":tab drop file" */
{
    int         i;
    win_T       *wp, *wpnext;
    char_u      *opened;        /* array of flags for which args are open */
    int         opened_len;     /* length of opened[] */
    int         use_firstwin = FALSE;   /* use first window for arglist */
    int         split_ret = OK;
    int         p_ea_save;
    alist_T     *alist;         /* argument list to be used */
    buf_T       *buf;
    tabpage_T   *tpnext;
    int         had_tab = cmdmod.tab;
    win_T       *new_curwin = NULL;
    tabpage_T   *new_curtab = NULL;

    if (ARGCOUNT <= 0)
    {
        /* Don't give an error message.  We don't want it when the ":all"
         * command is in the .vimrc. */
        return;
    }
    setpcmark();

    opened_len = ARGCOUNT;
    opened = alloc_clear((unsigned)opened_len);
    if (opened == NULL)
        return;

#ifdef FEAT_GUI
    need_mouse_correct = TRUE;
#endif

    /*
     * Try closing all windows that are not in the argument list.
     * Also close windows that are not full width;
     * When 'hidden' or "forceit" set the buffer becomes hidden.
     * Windows that have a changed buffer and can't be hidden won't be closed.
     * When the ":tab" modifier was used do this for all tab pages.
     */
    if (had_tab > 0)
        goto_tabpage_tp(first_tabpage);
    for (;;)
    {
        tpnext = curtab->tp_next;
        for (wp = firstwin; wp != NULL; wp = wpnext)
        {
            wpnext = wp->w_next;
            buf = wp->w_buffer;
            if (buf->b_ffname == NULL
                    || buf->b_nwindows > 1
#ifdef FEAT_VERTSPLIT
                    || wp->w_width != Columns
#endif
                    )
                i = ARGCOUNT;
            else
            {
                /* check if the buffer in this window is in the arglist */
                for (i = 0; i < ARGCOUNT; ++i)
                {
                    if (ARGLIST[i].ae_fnum == buf->b_fnum
                            || fullpathcmp(alist_name(&ARGLIST[i]),
                                              buf->b_ffname, TRUE) & FPC_SAME)
                    {
                        if (i < opened_len)
                        {
                            opened[i] = TRUE;
                            if (i == 0)
                            {
                                new_curwin = wp;
                                new_curtab = curtab;
                            }
                        }
                        if (wp->w_alist != curwin->w_alist)
                        {
                            /* Use the current argument list for all windows
                             * containing a file from it. */
                            alist_unlink(wp->w_alist);
                            wp->w_alist = curwin->w_alist;
                            ++wp->w_alist->al_refcount;
                        }
                        break;
                    }
                }
            }
            wp->w_arg_idx = i;

            if (i == ARGCOUNT && !keep_tabs)    /* close this window */
            {
                if (P_HID(buf) || forceit || buf->b_nwindows > 1
                                                        || !bufIsChanged(buf))
                {
                    /* If the buffer was changed, and we would like to hide it,
                     * try autowriting. */
                    if (!P_HID(buf) && buf->b_nwindows <= 1
                                                         && bufIsChanged(buf))
                    {
                        (void)autowrite(buf, FALSE);
#ifdef FEAT_AUTOCMD
                        /* check if autocommands removed the window */
                        if (!win_valid(wp) || !buf_valid(buf))
                        {
                            wpnext = firstwin;  /* start all over... */
                            continue;
                        }
#endif
                    }
#ifdef FEAT_WINDOWS
                    /* don't close last window */
                    if (firstwin == lastwin && first_tabpage->tp_next == NULL)
#endif
                        use_firstwin = TRUE;
#ifdef FEAT_WINDOWS
                    else
                    {
                        win_close(wp, !P_HID(buf) && !bufIsChanged(buf));
# ifdef FEAT_AUTOCMD
                        /* check if autocommands removed the next window */
                        if (!win_valid(wpnext))
                            wpnext = firstwin;  /* start all over... */
# endif
                    }
#endif
                }
            }
        }

        /* Without the ":tab" modifier only do the current tab page. */
        if (had_tab == 0 || tpnext == NULL)
            break;

# ifdef FEAT_AUTOCMD
        /* check if autocommands removed the next tab page */
        if (!valid_tabpage(tpnext))
            tpnext = first_tabpage;     /* start all over...*/
# endif
        goto_tabpage_tp(tpnext);
    }

    /*
     * Open a window for files in the argument list that don't have one.
     * ARGCOUNT may change while doing this, because of autocommands.
     */
    if (count > ARGCOUNT || count <= 0)
        count = ARGCOUNT;

    /* Autocommands may do anything to the argument list.  Make sure it's not
     * freed while we are working here by "locking" it.  We still have to
     * watch out for its size to be changed. */
    alist = curwin->w_alist;
    ++alist->al_refcount;

#ifdef FEAT_AUTOCMD
    /* Don't execute Win/Buf Enter/Leave autocommands here. */
    ++autocmd_no_enter;
    ++autocmd_no_leave;
#endif
    win_enter(lastwin, FALSE);
#ifdef FEAT_WINDOWS
    /* ":drop all" should re-use an empty window to avoid "--remote-tab"
     * leaving an empty tab page when executed locally. */
    if (keep_tabs && bufempty() && curbuf->b_nwindows == 1
                            && curbuf->b_ffname == NULL && !curbuf->b_changed)
        use_firstwin = TRUE;
#endif

    for (i = 0; i < count && i < alist->al_ga.ga_len && !got_int; ++i)
    {
        if (alist == &global_alist && i == global_alist.al_ga.ga_len - 1)
            arg_had_last = TRUE;
        if (i < opened_len && opened[i])
        {
            /* Move the already present window to below the current window */
            if (curwin->w_arg_idx != i)
            {
                for (wpnext = firstwin; wpnext != NULL; wpnext = wpnext->w_next)
                {
                    if (wpnext->w_arg_idx == i)
                    {
                        win_move_after(wpnext, curwin);
                        break;
                    }
                }
            }
        }
        else if (split_ret == OK)
        {
            if (!use_firstwin)          /* split current window */
            {
                p_ea_save = p_ea;
                p_ea = TRUE;            /* use space from all windows */
                split_ret = win_split(0, WSP_ROOM | WSP_BELOW);
                p_ea = p_ea_save;
                if (split_ret == FAIL)
                    continue;
            }
#ifdef FEAT_AUTOCMD
            else    /* first window: do autocmd for leaving this buffer */
                --autocmd_no_leave;
#endif

            /*
             * edit file "i"
             */
            curwin->w_arg_idx = i;
            if (i == 0)
            {
                new_curwin = curwin;
                new_curtab = curtab;
            }
            (void)do_ecmd(0, alist_name(&AARGLIST(alist)[i]), NULL, NULL,
                      ECMD_ONE,
                      ((P_HID(curwin->w_buffer)
                           || bufIsChanged(curwin->w_buffer)) ? ECMD_HIDE : 0)
                                                               + ECMD_OLDBUF);
#ifdef FEAT_AUTOCMD
            if (use_firstwin)
                ++autocmd_no_leave;
#endif
            use_firstwin = FALSE;
        }
        ui_breakcheck();

        /* When ":tab" was used open a new tab for a new window repeatedly. */
        if (had_tab > 0 && tabpage_index(NULL) <= p_tpm)
            cmdmod.tab = 9999;
    }

    /* Remove the "lock" on the argument list. */
    alist_unlink(alist);

#ifdef FEAT_AUTOCMD
    --autocmd_no_enter;
#endif
    /* to window with first arg */
    if (valid_tabpage(new_curtab))
        goto_tabpage_tp(new_curtab);
    if (win_valid(new_curwin))
        win_enter(new_curwin, FALSE);

#ifdef FEAT_AUTOCMD
    --autocmd_no_leave;
#endif
    vim_free(opened);
}

# if defined(FEAT_LISTCMDS) || defined(PROTO)
/*
 * Open a window for a number of buffers.
 */
    void
ex_buffer_all(eap)
    exarg_T     *eap;
{
    buf_T       *buf;
    win_T       *wp, *wpnext;
    int         split_ret = OK;
    int         p_ea_save;
    int         open_wins = 0;
    int         r;
    int         count;          /* Maximum number of windows to open. */
    int         all;            /* When TRUE also load inactive buffers. */
#ifdef FEAT_WINDOWS
    int         had_tab = cmdmod.tab;
    tabpage_T   *tpnext;
#endif

    if (eap->addr_count == 0)   /* make as many windows as possible */
        count = 9999;
    else
        count = eap->line2;     /* make as many windows as specified */
    if (eap->cmdidx == CMD_unhide || eap->cmdidx == CMD_sunhide)
        all = FALSE;
    else
        all = TRUE;

    setpcmark();

#ifdef FEAT_GUI
    need_mouse_correct = TRUE;
#endif

    /*
     * Close superfluous windows (two windows for the same buffer).
     * Also close windows that are not full-width.
     */
#ifdef FEAT_WINDOWS
    if (had_tab > 0)
        goto_tabpage_tp(first_tabpage);
    for (;;)
    {
#endif
        tpnext = curtab->tp_next;
        for (wp = firstwin; wp != NULL; wp = wpnext)
        {
            wpnext = wp->w_next;
            if ((wp->w_buffer->b_nwindows > 1
#ifdef FEAT_VERTSPLIT
                    || ((cmdmod.split & WSP_VERT)
                        ? wp->w_height + wp->w_status_height < Rows - p_ch
                                                            - tabline_height()
                        : wp->w_width != Columns)
#endif
#ifdef FEAT_WINDOWS
                    || (had_tab > 0 && wp != firstwin)
#endif
                    ) && firstwin != lastwin)
            {
                win_close(wp, FALSE);
#ifdef FEAT_AUTOCMD
                wpnext = firstwin;      /* just in case an autocommand does
                                           something strange with windows */
                tpnext = first_tabpage; /* start all over...*/
                open_wins = 0;
#endif
            }
            else
                ++open_wins;
        }

#ifdef FEAT_WINDOWS
        /* Without the ":tab" modifier only do the current tab page. */
        if (had_tab == 0 || tpnext == NULL)
            break;
        goto_tabpage_tp(tpnext);
    }
#endif

    /*
     * Go through the buffer list.  When a buffer doesn't have a window yet,
     * open one.  Otherwise move the window to the right position.
     * Watch out for autocommands that delete buffers or windows!
     */
#ifdef FEAT_AUTOCMD
    /* Don't execute Win/Buf Enter/Leave autocommands here. */
    ++autocmd_no_enter;
#endif
    win_enter(lastwin, FALSE);
#ifdef FEAT_AUTOCMD
    ++autocmd_no_leave;
#endif
    for (buf = firstbuf; buf != NULL && open_wins < count; buf = buf->b_next)
    {
        /* Check if this buffer needs a window */
        if ((!all && buf->b_ml.ml_mfp == NULL) || !buf->b_p_bl)
            continue;

#ifdef FEAT_WINDOWS
        if (had_tab != 0)
        {
            /* With the ":tab" modifier don't move the window. */
            if (buf->b_nwindows > 0)
                wp = lastwin;       /* buffer has a window, skip it */
            else
                wp = NULL;
        }
        else
#endif
        {
            /* Check if this buffer already has a window */
            for (wp = firstwin; wp != NULL; wp = wp->w_next)
                if (wp->w_buffer == buf)
                    break;
            /* If the buffer already has a window, move it */
            if (wp != NULL)
                win_move_after(wp, curwin);
        }

        if (wp == NULL && split_ret == OK)
        {
            /* Split the window and put the buffer in it */
            p_ea_save = p_ea;
            p_ea = TRUE;                /* use space from all windows */
            split_ret = win_split(0, WSP_ROOM | WSP_BELOW);
            ++open_wins;
            p_ea = p_ea_save;
            if (split_ret == FAIL)
                continue;

            /* Open the buffer in this window. */
#if defined(HAS_SWAP_EXISTS_ACTION)
            swap_exists_action = SEA_DIALOG;
#endif
            set_curbuf(buf, DOBUF_GOTO);
#ifdef FEAT_AUTOCMD
            if (!buf_valid(buf))        /* autocommands deleted the buffer!!! */
            {
#if defined(HAS_SWAP_EXISTS_ACTION)
                swap_exists_action = SEA_NONE;
# endif
                break;
            }
#endif
#if defined(HAS_SWAP_EXISTS_ACTION)
            if (swap_exists_action == SEA_QUIT)
            {
# if defined(FEAT_AUTOCMD) && defined(FEAT_EVAL)
                cleanup_T   cs;

                /* Reset the error/interrupt/exception state here so that
                 * aborting() returns FALSE when closing a window. */
                enter_cleanup(&cs);
# endif

                /* User selected Quit at ATTENTION prompt; close this window. */
                win_close(curwin, TRUE);
                --open_wins;
                swap_exists_action = SEA_NONE;
                swap_exists_did_quit = TRUE;

# if defined(FEAT_AUTOCMD) && defined(FEAT_EVAL)
                /* Restore the error/interrupt/exception state if not
                 * discarded by a new aborting error, interrupt, or uncaught
                 * exception. */
                leave_cleanup(&cs);
# endif
            }
            else
                handle_swap_exists(NULL);
#endif
        }

        ui_breakcheck();
        if (got_int)
        {
            (void)vgetc();      /* only break the file loading, not the rest */
            break;
        }
#ifdef FEAT_EVAL
        /* Autocommands deleted the buffer or aborted script processing!!! */
        if (aborting())
            break;
#endif
#ifdef FEAT_WINDOWS
        /* When ":tab" was used open a new tab for a new window repeatedly. */
        if (had_tab > 0 && tabpage_index(NULL) <= p_tpm)
            cmdmod.tab = 9999;
#endif
    }
#ifdef FEAT_AUTOCMD
    --autocmd_no_enter;
#endif
    win_enter(firstwin, FALSE);         /* back to first window */
#ifdef FEAT_AUTOCMD
    --autocmd_no_leave;
#endif

    /*
     * Close superfluous windows.
     */
    for (wp = lastwin; open_wins > count; )
    {
        r = (P_HID(wp->w_buffer) || !bufIsChanged(wp->w_buffer)
                                     || autowrite(wp->w_buffer, FALSE) == OK);
#ifdef FEAT_AUTOCMD
        if (!win_valid(wp))
        {
            /* BufWrite Autocommands made the window invalid, start over */
            wp = lastwin;
        }
        else
#endif
            if (r)
        {
            win_close(wp, !P_HID(wp->w_buffer));
            --open_wins;
            wp = lastwin;
        }
        else
        {
            wp = wp->w_prev;
            if (wp == NULL)
                break;
        }
    }
}
# endif /* FEAT_LISTCMDS */

#endif /* FEAT_WINDOWS */

static int  chk_modeline __ARGS((linenr_T, int));

/*
 * do_modelines() - process mode lines for the current file
 *
 * "flags" can be:
 * OPT_WINONLY      only set options local to window
 * OPT_NOWIN        don't set options local to window
 *
 * Returns immediately if the "ml" option isn't set.
 */
    void
do_modelines(flags)
    int         flags;
{
    linenr_T    lnum;
    int         nmlines;
    static int  entered = 0;

    if (!curbuf->b_p_ml || (nmlines = (int)p_mls) == 0)
        return;

    /* Disallow recursive entry here.  Can happen when executing a modeline
     * triggers an autocommand, which reloads modelines with a ":do". */
    if (entered)
        return;

    ++entered;
    for (lnum = 1; lnum <= curbuf->b_ml.ml_line_count && lnum <= nmlines;
                                                                       ++lnum)
        if (chk_modeline(lnum, flags) == FAIL)
            nmlines = 0;

    for (lnum = curbuf->b_ml.ml_line_count; lnum > 0 && lnum > nmlines
                       && lnum > curbuf->b_ml.ml_line_count - nmlines; --lnum)
        if (chk_modeline(lnum, flags) == FAIL)
            nmlines = 0;
    --entered;
}

#include "version.h"            /* for version number */

/*
 * chk_modeline() - check a single line for a mode string
 * Return FAIL if an error encountered.
 */
    static int
chk_modeline(lnum, flags)
    linenr_T    lnum;
    int         flags;          /* Same as for do_modelines(). */
{
    char_u      *s;
    char_u      *e;
    char_u      *linecopy;              /* local copy of any modeline found */
    int         prev;
    int         vers;
    int         end;
    int         retval = OK;
    char_u      *save_sourcing_name;
    linenr_T    save_sourcing_lnum;
#ifdef FEAT_EVAL
    scid_T      save_SID;
#endif

    prev = -1;
    for (s = ml_get(lnum); *s != NUL; ++s)
    {
        if (prev == -1 || vim_isspace(prev))
        {
            if ((prev != -1 && STRNCMP(s, "ex:", (size_t)3) == 0)
                    || STRNCMP(s, "vi:", (size_t)3) == 0)
                break;
            if (STRNCMP(s, "vim", 3) == 0)
            {
                if (s[3] == '<' || s[3] == '=' || s[3] == '>')
                    e = s + 4;
                else
                    e = s + 3;
                vers = getdigits(&e);
                if (*e == ':'
                        && (s[3] == ':'
                            || (VIM_VERSION_100 >= vers && isdigit(s[3]))
                            || (VIM_VERSION_100 < vers && s[3] == '<')
                            || (VIM_VERSION_100 > vers && s[3] == '>')
                            || (VIM_VERSION_100 == vers && s[3] == '=')))
                    break;
            }
        }
        prev = *s;
    }

    if (*s)
    {
        do                              /* skip over "ex:", "vi:" or "vim:" */
            ++s;
        while (s[-1] != ':');

        s = linecopy = vim_strsave(s);  /* copy the line, it will change */
        if (linecopy == NULL)
            return FAIL;

        save_sourcing_lnum = sourcing_lnum;
        save_sourcing_name = sourcing_name;
        sourcing_lnum = lnum;           /* prepare for emsg() */
        sourcing_name = (char_u *)"modelines";

        end = FALSE;
        while (end == FALSE)
        {
            s = skipwhite(s);
            if (*s == NUL)
                break;

            /*
             * Find end of set command: ':' or end of line.
             * Skip over "\:", replacing it with ":".
             */
            for (e = s; *e != ':' && *e != NUL; ++e)
                if (e[0] == '\\' && e[1] == ':')
                    STRMOVE(e, e + 1);
            if (*e == NUL)
                end = TRUE;

            /*
             * If there is a "set" command, require a terminating ':' and
             * ignore the stuff after the ':'.
             * "vi:set opt opt opt: foo" -- foo not interpreted
             * "vi:opt opt opt: foo" -- foo interpreted
             * Accept "se" for compatibility with Elvis.
             */
            if (STRNCMP(s, "set ", (size_t)4) == 0
                    || STRNCMP(s, "se ", (size_t)3) == 0)
            {
                if (*e != ':')          /* no terminating ':'? */
                    break;
                end = TRUE;
                s = vim_strchr(s, ' ') + 1;
            }
            *e = NUL;                   /* truncate the set command */

            if (*s != NUL)              /* skip over an empty "::" */
            {
#ifdef FEAT_EVAL
                save_SID = current_SID;
                current_SID = SID_MODELINE;
#endif
                retval = do_set(s, OPT_MODELINE | OPT_LOCAL | flags);
#ifdef FEAT_EVAL
                current_SID = save_SID;
#endif
                if (retval == FAIL)             /* stop if error found */
                    break;
            }
            s = e + 1;                  /* advance to next part */
        }

        sourcing_lnum = save_sourcing_lnum;
        sourcing_name = save_sourcing_name;

        vim_free(linecopy);
    }
    return retval;
}

#if defined(FEAT_VIMINFO) || defined(PROTO)
    int
read_viminfo_bufferlist(virp, writing)
    vir_T       *virp;
    int         writing;
{
    char_u      *tab;
    linenr_T    lnum;
    colnr_T     col;
    buf_T       *buf;
    char_u      *sfname;
    char_u      *xline;

    /* Handle long line and escaped characters. */
    xline = viminfo_readstring(virp, 1, FALSE);

    /* don't read in if there are files on the command-line or if writing: */
    if (xline != NULL && !writing && ARGCOUNT == 0
                                       && find_viminfo_parameter('%') != NULL)
    {
        /* Format is: <fname> Tab <lnum> Tab <col>.
         * Watch out for a Tab in the file name, work from the end. */
        lnum = 0;
        col = 0;
        tab = vim_strrchr(xline, '\t');
        if (tab != NULL)
        {
            *tab++ = '\0';
            col = atoi((char *)tab);
            tab = vim_strrchr(xline, '\t');
            if (tab != NULL)
            {
                *tab++ = '\0';
                lnum = atol((char *)tab);
            }
        }

        /* Expand "~/" in the file name at "line + 1" to a full path.
         * Then try shortening it by comparing with the current directory */
        expand_env(xline, NameBuff, MAXPATHL);
        sfname = shorten_fname1(NameBuff);

        buf = buflist_new(NameBuff, sfname, (linenr_T)0, BLN_LISTED);
        if (buf != NULL)        /* just in case... */
        {
            buf->b_last_cursor.lnum = lnum;
            buf->b_last_cursor.col = col;
            buflist_setfpos(buf, curwin, lnum, col, FALSE);
        }
    }
    vim_free(xline);

    return viminfo_readline(virp);
}

    void
write_viminfo_bufferlist(fp)
    FILE    *fp;
{
    buf_T       *buf;
#ifdef FEAT_WINDOWS
    win_T       *win;
    tabpage_T   *tp;
#endif
    char_u      *line;
    int         max_buffers;

    if (find_viminfo_parameter('%') == NULL)
        return;

    /* Without a number -1 is returned: do all buffers. */
    max_buffers = get_viminfo_parameter('%');

    /* Allocate room for the file name, lnum and col. */
    line = alloc(MAXPATHL + 40);
    if (line == NULL)
        return;

#ifdef FEAT_WINDOWS
    FOR_ALL_TAB_WINDOWS(tp, win)
        set_last_cursor(win);
#else
    set_last_cursor(curwin);
#endif

    fprintf(fp, _("\n# Buffer list:\n"));
    for (buf = firstbuf; buf != NULL ; buf = buf->b_next)
    {
        if (buf->b_fname == NULL
                || !buf->b_p_bl
#ifdef FEAT_QUICKFIX
                || bt_quickfix(buf)
#endif
                || removable(buf->b_ffname))
            continue;

        if (max_buffers-- == 0)
            break;
        putc('%', fp);
        home_replace(NULL, buf->b_ffname, line, MAXPATHL, TRUE);
        sprintf((char *)line + STRLEN(line), "\t%ld\t%d",
                        (long)buf->b_last_cursor.lnum,
                        buf->b_last_cursor.col);
        viminfo_writestring(fp, line);
    }
    vim_free(line);
}
#endif


/*
 * Return special buffer name.
 * Returns NULL when the buffer has a normal file name.
 */
    char *
buf_spname(buf)
    buf_T       *buf;
{
#if defined(FEAT_QUICKFIX) && defined(FEAT_WINDOWS)
    if (bt_quickfix(buf))
    {
        win_T       *win = NULL;
        tabpage_T   *tp;

        /*
         * For location list window, w_llist_ref points to the location list.
         * For quickfix window, w_llist_ref is NULL.
         */
        FOR_ALL_TAB_WINDOWS(tp, win)
            if (win->w_buffer == buf)
                break;
        if (win != NULL && win->w_llist_ref != NULL)
            return _("[Location List]");
        else
            return _("[Quickfix List]");
    }
#endif
#ifdef FEAT_QUICKFIX
    /* There is no _file_ when 'buftype' is "nofile", b_sfname
     * contains the name as specified by the user */
    if (bt_nofile(buf))
    {
        if (buf->b_sfname != NULL)
            return (char *)buf->b_sfname;
        return "[Scratch]";
    }
#endif
    if (buf->b_fname == NULL)
        return _("[No Name]");
    return NULL;
}


#if defined(FEAT_SIGNS) || defined(PROTO)
/*
 * Insert the sign into the signlist.
 */
    static void
insert_sign(buf, prev, next, id, lnum, typenr)
    buf_T       *buf;           /* buffer to store sign in */
    signlist_T  *prev;          /* previous sign entry */
    signlist_T  *next;          /* next sign entry */
    int         id;             /* sign ID */
    linenr_T    lnum;           /* line number which gets the mark */
    int         typenr;         /* typenr of sign we are adding */
{
    signlist_T  *newsign;

    newsign = (signlist_T *)lalloc((long_u)sizeof(signlist_T), FALSE);
    if (newsign != NULL)
    {
        newsign->id = id;
        newsign->lnum = lnum;
        newsign->typenr = typenr;
        newsign->next = next;
#ifdef FEAT_NETBEANS_INTG
        newsign->prev = prev;
        if (next != NULL)
            next->prev = newsign;
#endif

        if (prev == NULL)
        {
            /* When adding first sign need to redraw the windows to create the
             * column for signs. */
            if (buf->b_signlist == NULL)
            {
                redraw_buf_later(buf, NOT_VALID);
                changed_cline_bef_curs();
            }

            /* first sign in signlist */
            buf->b_signlist = newsign;
        }
        else
            prev->next = newsign;
    }
}

/*
 * Add the sign into the signlist. Find the right spot to do it though.
 */
    void
buf_addsign(buf, id, lnum, typenr)
    buf_T       *buf;           /* buffer to store sign in */
    int         id;             /* sign ID */
    linenr_T    lnum;           /* line number which gets the mark */
    int         typenr;         /* typenr of sign we are adding */
{
    signlist_T  *sign;          /* a sign in the signlist */
    signlist_T  *prev;          /* the previous sign */

    prev = NULL;
    for (sign = buf->b_signlist; sign != NULL; sign = sign->next)
    {
        if (lnum == sign->lnum && id == sign->id)
        {
            sign->typenr = typenr;
            return;
        }
        else if (
#ifndef FEAT_NETBEANS_INTG  /* keep signs sorted by lnum */
                   id < 0 &&
#endif
                             lnum < sign->lnum)
        {
#ifdef FEAT_NETBEANS_INTG /* insert new sign at head of list for this lnum */
            /* XXX - GRP: Is this because of sign slide problem? Or is it
             * really needed? Or is it because we allow multiple signs per
             * line? If so, should I add that feature to FEAT_SIGNS?
             */
            while (prev != NULL && prev->lnum == lnum)
                prev = prev->prev;
            if (prev == NULL)
                sign = buf->b_signlist;
            else
                sign = prev->next;
#endif
            insert_sign(buf, prev, sign, id, lnum, typenr);
            return;
        }
        prev = sign;
    }
#ifdef FEAT_NETBEANS_INTG /* insert new sign at head of list for this lnum */
    /* XXX - GRP: See previous comment */
    while (prev != NULL && prev->lnum == lnum)
        prev = prev->prev;
    if (prev == NULL)
        sign = buf->b_signlist;
    else
        sign = prev->next;
#endif
    insert_sign(buf, prev, sign, id, lnum, typenr);

    return;
}

    int
buf_change_sign_type(buf, markId, typenr)
    buf_T       *buf;           /* buffer to store sign in */
    int         markId;         /* sign ID */
    int         typenr;         /* typenr of sign we are adding */
{
    signlist_T  *sign;          /* a sign in the signlist */

    for (sign = buf->b_signlist; sign != NULL; sign = sign->next)
    {
        if (sign->id == markId)
        {
            sign->typenr = typenr;
            return sign->lnum;
        }
    }

    return 0;
}

    int_u
buf_getsigntype(buf, lnum, type)
    buf_T       *buf;
    linenr_T    lnum;
    int         type;   /* SIGN_ICON, SIGN_TEXT, SIGN_ANY, SIGN_LINEHL */
{
    signlist_T  *sign;          /* a sign in a b_signlist */

    for (sign = buf->b_signlist; sign != NULL; sign = sign->next)
        if (sign->lnum == lnum
                && (type == SIGN_ANY
# ifdef FEAT_SIGN_ICONS
                    || (type == SIGN_ICON
                        && sign_get_image(sign->typenr) != NULL)
# endif
                    || (type == SIGN_TEXT
                        && sign_get_text(sign->typenr) != NULL)
                    || (type == SIGN_LINEHL
                        && sign_get_attr(sign->typenr, TRUE) != 0)))
            return sign->typenr;
    return 0;
}


    linenr_T
buf_delsign(buf, id)
    buf_T       *buf;           /* buffer sign is stored in */
    int         id;             /* sign id */
{
    signlist_T  **lastp;        /* pointer to pointer to current sign */
    signlist_T  *sign;          /* a sign in a b_signlist */
    signlist_T  *next;          /* the next sign in a b_signlist */
    linenr_T    lnum;           /* line number whose sign was deleted */

    lastp = &buf->b_signlist;
    lnum = 0;
    for (sign = buf->b_signlist; sign != NULL; sign = next)
    {
        next = sign->next;
        if (sign->id == id)
        {
            *lastp = next;
#ifdef FEAT_NETBEANS_INTG
            if (next != NULL)
                next->prev = sign->prev;
#endif
            lnum = sign->lnum;
            vim_free(sign);
            break;
        }
        else
            lastp = &sign->next;
    }

    /* When deleted the last sign need to redraw the windows to remove the
     * sign column. */
    if (buf->b_signlist == NULL)
    {
        redraw_buf_later(buf, NOT_VALID);
        changed_cline_bef_curs();
    }

    return lnum;
}


/*
 * Find the line number of the sign with the requested id. If the sign does
 * not exist, return 0 as the line number. This will still let the correct file
 * get loaded.
 */
    int
buf_findsign(buf, id)
    buf_T       *buf;           /* buffer to store sign in */
    int         id;             /* sign ID */
{
    signlist_T  *sign;          /* a sign in the signlist */

    for (sign = buf->b_signlist; sign != NULL; sign = sign->next)
        if (sign->id == id)
            return sign->lnum;

    return 0;
}

    int
buf_findsign_id(buf, lnum)
    buf_T       *buf;           /* buffer whose sign we are searching for */
    linenr_T    lnum;           /* line number of sign */
{
    signlist_T  *sign;          /* a sign in the signlist */

    for (sign = buf->b_signlist; sign != NULL; sign = sign->next)
        if (sign->lnum == lnum)
            return sign->id;

    return 0;
}


# if defined(FEAT_NETBEANS_INTG) || defined(PROTO)
/* see if a given type of sign exists on a specific line */
    int
buf_findsigntype_id(buf, lnum, typenr)
    buf_T       *buf;           /* buffer whose sign we are searching for */
    linenr_T    lnum;           /* line number of sign */
    int         typenr;         /* sign type number */
{
    signlist_T  *sign;          /* a sign in the signlist */

    for (sign = buf->b_signlist; sign != NULL; sign = sign->next)
        if (sign->lnum == lnum && sign->typenr == typenr)
            return sign->id;

    return 0;
}


#  if defined(FEAT_SIGN_ICONS) || defined(PROTO)
/* return the number of icons on the given line */
    int
buf_signcount(buf, lnum)
    buf_T       *buf;
    linenr_T    lnum;
{
    signlist_T  *sign;          /* a sign in the signlist */
    int         count = 0;

    for (sign = buf->b_signlist; sign != NULL; sign = sign->next)
        if (sign->lnum == lnum)
            if (sign_get_image(sign->typenr) != NULL)
                count++;

    return count;
}
#  endif /* FEAT_SIGN_ICONS */
# endif /* FEAT_NETBEANS_INTG */


/*
 * Delete signs in buffer "buf".
 */
    static void
buf_delete_signs(buf)
    buf_T       *buf;
{
    signlist_T  *next;

    while (buf->b_signlist != NULL)
    {
        next = buf->b_signlist->next;
        vim_free(buf->b_signlist);
        buf->b_signlist = next;
    }
}

/*
 * Delete all signs in all buffers.
 */
    void
buf_delete_all_signs()
{
    buf_T       *buf;           /* buffer we are checking for signs */

    for (buf = firstbuf; buf != NULL; buf = buf->b_next)
        if (buf->b_signlist != NULL)
        {
            /* Need to redraw the windows to remove the sign column. */
            redraw_buf_later(buf, NOT_VALID);
            buf_delete_signs(buf);
        }
}

/*
 * List placed signs for "rbuf".  If "rbuf" is NULL do it for all buffers.
 */
    void
sign_list_placed(rbuf)
    buf_T       *rbuf;
{
    buf_T       *buf;
    signlist_T  *p;
    char        lbuf[BUFSIZ];

    MSG_PUTS_TITLE(_("\n--- Signs ---"));
    msg_putchar('\n');
    if (rbuf == NULL)
        buf = firstbuf;
    else
        buf = rbuf;
    while (buf != NULL)
    {
        if (buf->b_signlist != NULL)
        {
            vim_snprintf(lbuf, BUFSIZ, _("Signs for %s:"), buf->b_fname);
            MSG_PUTS_ATTR(lbuf, hl_attr(HLF_D));
            msg_putchar('\n');
        }
        for (p = buf->b_signlist; p != NULL; p = p->next)
        {
            vim_snprintf(lbuf, BUFSIZ, _("    line=%ld  id=%d  name=%s"),
                           (long)p->lnum, p->id, sign_typenr2name(p->typenr));
            MSG_PUTS(lbuf);
            msg_putchar('\n');
        }
        if (rbuf != NULL)
            break;
        buf = buf->b_next;
    }
}

/*
 * Adjust a placed sign for inserted/deleted lines.
 */
    void
sign_mark_adjust(line1, line2, amount, amount_after)
    linenr_T    line1;
    linenr_T    line2;
    long        amount;
    long        amount_after;
{
    signlist_T  *sign;          /* a sign in a b_signlist */

    for (sign = curbuf->b_signlist; sign != NULL; sign = sign->next)
    {
        if (sign->lnum >= line1 && sign->lnum <= line2)
        {
            if (amount == MAXLNUM)
                sign->lnum = line1;
            else
                sign->lnum += amount;
        }
        else if (sign->lnum > line2)
            sign->lnum += amount_after;
    }
}
#endif /* FEAT_SIGNS */

/*
 * Set 'buflisted' for curbuf to "on" and trigger autocommands if it changed.
 */
    void
set_buflisted(on)
    int         on;
{
    if (on != curbuf->b_p_bl)
    {
        curbuf->b_p_bl = on;
#ifdef FEAT_AUTOCMD
        if (on)
            apply_autocmds(EVENT_BUFADD, NULL, NULL, FALSE, curbuf);
        else
            apply_autocmds(EVENT_BUFDELETE, NULL, NULL, FALSE, curbuf);
#endif
    }
}

/*
 * Read the file for "buf" again and check if the contents changed.
 * Return TRUE if it changed or this could not be checked.
 */
    int
buf_contents_changed(buf)
    buf_T       *buf;
{
    buf_T       *newbuf;
    int         differ = TRUE;
    linenr_T    lnum;
    aco_save_T  aco;
    exarg_T     ea;

    /* Allocate a buffer without putting it in the buffer list. */
    newbuf = buflist_new(NULL, NULL, (linenr_T)1, BLN_DUMMY);
    if (newbuf == NULL)
        return TRUE;

    /* Force the 'fileencoding' and 'fileformat' to be equal. */
    if (prep_exarg(&ea, buf) == FAIL)
    {
        wipe_buffer(newbuf, FALSE);
        return TRUE;
    }

    /* set curwin/curbuf to buf and save a few things */
    aucmd_prepbuf(&aco, newbuf);

    if (ml_open(curbuf) == OK
            && readfile(buf->b_ffname, buf->b_fname,
                                  (linenr_T)0, (linenr_T)0, (linenr_T)MAXLNUM,
                                            &ea, READ_NEW | READ_DUMMY) == OK)
    {
        /* compare the two files line by line */
        if (buf->b_ml.ml_line_count == curbuf->b_ml.ml_line_count)
        {
            differ = FALSE;
            for (lnum = 1; lnum <= curbuf->b_ml.ml_line_count; ++lnum)
                if (STRCMP(ml_get_buf(buf, lnum, FALSE), ml_get(lnum)) != 0)
                {
                    differ = TRUE;
                    break;
                }
        }
    }
    vim_free(ea.cmd);

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

    if (curbuf != newbuf)       /* safety check */
        wipe_buffer(newbuf, FALSE);

    return differ;
}

/*
 * Wipe out a buffer and decrement the last buffer number if it was used for
 * this buffer.  Call this to wipe out a temp buffer that does not contain any
 * marks.
 */
/*ARGSUSED*/
    void
wipe_buffer(buf, aucmd)
    buf_T       *buf;
    int         aucmd;      /* When TRUE trigger autocommands. */
{
    if (buf->b_fnum == top_file_num - 1)
        --top_file_num;

#ifdef FEAT_AUTOCMD
    if (!aucmd)             /* Don't trigger BufDelete autocommands here. */
        block_autocmds();
#endif
    close_buffer(NULL, buf, DOBUF_WIPE);
#ifdef FEAT_AUTOCMD
    if (!aucmd)
        unblock_autocmds();
#endif
}