Merge branch 'vim-with-runtime' into feat/var-tabstops

[vim_extended.git] / src / message.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.
 */

/*
 * message.c: functions for displaying messages on the command line
 */

#define MESSAGE_FILE            /* don't include prototype for smsg() */

#include "vim.h"

#if defined(FEAT_FLOAT) && defined(HAVE_MATH_H)
# include <math.h>
#endif

static int other_sourcing_name __ARGS((void));
static char_u *get_emsg_source __ARGS((void));
static char_u *get_emsg_lnum __ARGS((void));
static void add_msg_hist __ARGS((char_u *s, int len, int attr));
static void hit_return_msg __ARGS((void));
static void msg_home_replace_attr __ARGS((char_u *fname, int attr));
#ifdef FEAT_MBYTE
static char_u *screen_puts_mbyte __ARGS((char_u *s, int l, int attr));
#endif
static void msg_puts_attr_len __ARGS((char_u *str, int maxlen, int attr));
static void msg_puts_display __ARGS((char_u *str, int maxlen, int attr, int recurse));
static void msg_scroll_up __ARGS((void));
static void inc_msg_scrolled __ARGS((void));
static void store_sb_text __ARGS((char_u **sb_str, char_u *s, int attr, int *sb_col, int finish));
static void t_puts __ARGS((int *t_col, char_u *t_s, char_u *s, int attr));
static void msg_puts_printf __ARGS((char_u *str, int maxlen));
static int do_more_prompt __ARGS((int typed_char));
static void msg_screen_putchar __ARGS((int c, int attr));
static int  msg_check_screen __ARGS((void));
static void redir_write __ARGS((char_u *s, int maxlen));
static void verbose_write __ARGS((char_u *s, int maxlen));
#ifdef FEAT_CON_DIALOG
static char_u *msg_show_console_dialog __ARGS((char_u *message, char_u *buttons, int dfltbutton));
static int      confirm_msg_used = FALSE;       /* displaying confirm_msg */
static char_u   *confirm_msg = NULL;            /* ":confirm" message */
static char_u   *confirm_msg_tail;              /* tail of confirm_msg */
#endif

struct msg_hist
{
    struct msg_hist     *next;
    char_u              *msg;
    int                 attr;
};

static struct msg_hist *first_msg_hist = NULL;
static struct msg_hist *last_msg_hist = NULL;
static int msg_hist_len = 0;

/*
 * When writing messages to the screen, there are many different situations.
 * A number of variables is used to remember the current state:
 * msg_didany       TRUE when messages were written since the last time the
 *                  user reacted to a prompt.
 *                  Reset: After hitting a key for the hit-return prompt,
 *                  hitting <CR> for the command line or input().
 *                  Set: When any message is written to the screen.
 * msg_didout       TRUE when something was written to the current line.
 *                  Reset: When advancing to the next line, when the current
 *                  text can be overwritten.
 *                  Set: When any message is written to the screen.
 * msg_nowait       No extra delay for the last drawn message.
 *                  Used in normal_cmd() before the mode message is drawn.
 * emsg_on_display  There was an error message recently.  Indicates that there
 *                  should be a delay before redrawing.
 * msg_scroll       The next message should not overwrite the current one.
 * msg_scrolled     How many lines the screen has been scrolled (because of
 *                  messages).  Used in update_screen() to scroll the screen
 *                  back.  Incremented each time the screen scrolls a line.
 * msg_scrolled_ign  TRUE when msg_scrolled is non-zero and msg_puts_attr()
 *                  writes something without scrolling should not make
 *                  need_wait_return to be set.  This is a hack to make ":ts"
 *                  work without an extra prompt.
 * lines_left       Number of lines available for messages before the
 *                  more-prompt is to be given.
 * need_wait_return TRUE when the hit-return prompt is needed.
 *                  Reset: After giving the hit-return prompt, when the user
 *                  has answered some other prompt.
 *                  Set: When the ruler or typeahead display is overwritten,
 *                  scrolling the screen for some message.
 * keep_msg         Message to be displayed after redrawing the screen, in
 *                  main_loop().
 *                  This is an allocated string or NULL when not used.
 */

/*
 * msg(s) - displays the string 's' on the status line
 * When terminal not initialized (yet) mch_errmsg(..) is used.
 * return TRUE if wait_return not called
 */
    int
msg(s)
    char_u      *s;
{
    return msg_attr_keep(s, 0, FALSE);
}

#if defined(FEAT_EVAL) || defined(FEAT_X11) || defined(USE_XSMP) \
    || defined(FEAT_GUI_GTK) || defined(PROTO)
/*
 * Like msg() but keep it silent when 'verbosefile' is set.
 */
    int
verb_msg(s)
    char_u      *s;
{
    int         n;

    verbose_enter();
    n = msg_attr_keep(s, 0, FALSE);
    verbose_leave();

    return n;
}
#endif

    int
msg_attr(s, attr)
    char_u      *s;
    int         attr;
{
    return msg_attr_keep(s, attr, FALSE);
}

    int
msg_attr_keep(s, attr, keep)
    char_u      *s;
    int         attr;
    int         keep;       /* TRUE: set keep_msg if it doesn't scroll */
{
    static int  entered = 0;
    int         retval;
    char_u      *buf = NULL;

#ifdef FEAT_EVAL
    if (attr == 0)
        set_vim_var_string(VV_STATUSMSG, s, -1);
#endif

    /*
     * It is possible that displaying a messages causes a problem (e.g.,
     * when redrawing the window), which causes another message, etc..  To
     * break this loop, limit the recursiveness to 3 levels.
     */
    if (entered >= 3)
        return TRUE;
    ++entered;

    /* Add message to history (unless it's a repeated kept message or a
     * truncated message) */
    if (s != keep_msg
            || (*s != '<'
                && last_msg_hist != NULL
                && last_msg_hist->msg != NULL
                && STRCMP(s, last_msg_hist->msg)))
        add_msg_hist(s, -1, attr);

    /* When displaying keep_msg, don't let msg_start() free it, caller must do
     * that. */
    if (s == keep_msg)
        keep_msg = NULL;

    /* Truncate the message if needed. */
    msg_start();
    buf = msg_strtrunc(s, FALSE);
    if (buf != NULL)
        s = buf;

    msg_outtrans_attr(s, attr);
    msg_clr_eos();
    retval = msg_end();

    if (keep && retval && vim_strsize(s) < (int)(Rows - cmdline_row - 1)
                                                           * Columns + sc_col)
        set_keep_msg(s, 0);

    vim_free(buf);
    --entered;
    return retval;
}

/*
 * Truncate a string such that it can be printed without causing a scroll.
 * Returns an allocated string or NULL when no truncating is done.
 */
    char_u *
msg_strtrunc(s, force)
    char_u      *s;
    int         force;      /* always truncate */
{
    char_u      *buf = NULL;
    int         len;
    int         room;

    /* May truncate message to avoid a hit-return prompt */
    if ((!msg_scroll && !need_wait_return && shortmess(SHM_TRUNCALL)
                               && !exmode_active && msg_silent == 0) || force)
    {
        len = vim_strsize(s);
        if (msg_scrolled != 0)
            /* Use all the columns. */
            room = (int)(Rows - msg_row) * Columns - 1;
        else
            /* Use up to 'showcmd' column. */
            room = (int)(Rows - msg_row - 1) * Columns + sc_col - 1;
        if (len > room && room > 0)
        {
#ifdef FEAT_MBYTE
            if (enc_utf8)
                /* may have up to 18 bytes per cell (6 per char, up to two
                 * composing chars) */
                buf = alloc((room + 2) * 18);
            else if (enc_dbcs == DBCS_JPNU)
                /* may have up to 2 bytes per cell for euc-jp */
                buf = alloc((room + 2) * 2);
            else
#endif
                buf = alloc(room + 2);
            if (buf != NULL)
                trunc_string(s, buf, room);
        }
    }
    return buf;
}

/*
 * Truncate a string "s" to "buf" with cell width "room".
 * "s" and "buf" may be equal.
 */
    void
trunc_string(s, buf, room)
    char_u      *s;
    char_u      *buf;
    int         room;
{
    int         half;
    int         len;
    int         e;
    int         i;
    int         n;

    room -= 3;
    half = room / 2;
    len = 0;

    /* First part: Start of the string. */
    for (e = 0; len < half; ++e)
    {
        if (s[e] == NUL)
        {
            /* text fits without truncating! */
            buf[e] = NUL;
            return;
        }
        n = ptr2cells(s + e);
        if (len + n >= half)
            break;
        len += n;
        buf[e] = s[e];
#ifdef FEAT_MBYTE
        if (has_mbyte)
            for (n = (*mb_ptr2len)(s + e); --n > 0; )
            {
                ++e;
                buf[e] = s[e];
            }
#endif
    }

    /* Last part: End of the string. */
    i = e;
#ifdef FEAT_MBYTE
    if (enc_dbcs != 0)
    {
        /* For DBCS going backwards in a string is slow, but
         * computing the cell width isn't too slow: go forward
         * until the rest fits. */
        n = vim_strsize(s + i);
        while (len + n > room)
        {
            n -= ptr2cells(s + i);
            i += (*mb_ptr2len)(s + i);
        }
    }
    else if (enc_utf8)
    {
        /* For UTF-8 we can go backwards easily. */
        half = i = (int)STRLEN(s);
        for (;;)
        {
            do
                half = half - (*mb_head_off)(s, s + half - 1) - 1;
            while (utf_iscomposing(utf_ptr2char(s + half)) && half > 0);
            n = ptr2cells(s + half);
            if (len + n > room)
                break;
            len += n;
            i = half;
        }
    }
    else
#endif
    {
        for (i = (int)STRLEN(s); len + (n = ptr2cells(s + i - 1)) <= room; --i)
            len += n;
    }

    /* Set the middle and copy the last part. */
    mch_memmove(buf + e, "...", (size_t)3);
    STRMOVE(buf + e + 3, s + i);
}

/*
 * Automatic prototype generation does not understand this function.
 * Note: Caller of smgs() and smsg_attr() must check the resulting string is
 * shorter than IOSIZE!!!
 */
#ifndef PROTO
# ifndef HAVE_STDARG_H

int
#ifdef __BORLANDC__
_RTLENTRYF
#endif
smsg __ARGS((char_u *, long, long, long,
                        long, long, long, long, long, long, long));
int
#ifdef __BORLANDC__
_RTLENTRYF
#endif
smsg_attr __ARGS((int, char_u *, long, long, long,
                        long, long, long, long, long, long, long));

int vim_snprintf __ARGS((char *, size_t, char *, long, long, long,
                                   long, long, long, long, long, long, long));

/*
 * smsg(str, arg, ...) is like using sprintf(buf, str, arg, ...) and then
 * calling msg(buf).
 * The buffer used is IObuff, the message is truncated at IOSIZE.
 */

/* VARARGS */
    int
#ifdef __BORLANDC__
_RTLENTRYF
#endif
smsg(s, a1, a2, a3, a4, a5, a6, a7, a8, a9, a10)
    char_u      *s;
    long        a1, a2, a3, a4, a5, a6, a7, a8, a9, a10;
{
    return smsg_attr(0, s, a1, a2, a3, a4, a5, a6, a7, a8, a9, a10);
}

/* VARARGS */
    int
#ifdef __BORLANDC__
_RTLENTRYF
#endif
smsg_attr(attr, s, a1, a2, a3, a4, a5, a6, a7, a8, a9, a10)
    int         attr;
    char_u      *s;
    long        a1, a2, a3, a4, a5, a6, a7, a8, a9, a10;
{
    vim_snprintf((char *)IObuff, IOSIZE, (char *)s,
                                     a1, a2, a3, a4, a5, a6, a7, a8, a9, a10);
    return msg_attr(IObuff, attr);
}

# else /* HAVE_STDARG_H */

int vim_snprintf(char *str, size_t str_m, char *fmt, ...);

    int
#ifdef __BORLANDC__
_RTLENTRYF
#endif
smsg(char_u *s, ...)
{
    va_list arglist;

    va_start(arglist, s);
    vim_vsnprintf((char *)IObuff, IOSIZE, (char *)s, arglist, NULL);
    va_end(arglist);
    return msg(IObuff);
}

    int
#ifdef __BORLANDC__
_RTLENTRYF
#endif
smsg_attr(int attr, char_u *s, ...)
{
    va_list arglist;

    va_start(arglist, s);
    vim_vsnprintf((char *)IObuff, IOSIZE, (char *)s, arglist, NULL);
    va_end(arglist);
    return msg_attr(IObuff, attr);
}

# endif /* HAVE_STDARG_H */
#endif

/*
 * Remember the last sourcing name/lnum used in an error message, so that it
 * isn't printed each time when it didn't change.
 */
static int      last_sourcing_lnum = 0;
static char_u   *last_sourcing_name = NULL;

/*
 * Reset the last used sourcing name/lnum.  Makes sure it is displayed again
 * for the next error message;
 */
    void
reset_last_sourcing()
{
    vim_free(last_sourcing_name);
    last_sourcing_name = NULL;
    last_sourcing_lnum = 0;
}

/*
 * Return TRUE if "sourcing_name" differs from "last_sourcing_name".
 */
    static int
other_sourcing_name()
{
    if (sourcing_name != NULL)
    {
        if (last_sourcing_name != NULL)
            return STRCMP(sourcing_name, last_sourcing_name) != 0;
        return TRUE;
    }
    return FALSE;
}

/*
 * Get the message about the source, as used for an error message.
 * Returns an allocated string with room for one more character.
 * Returns NULL when no message is to be given.
 */
    static char_u *
get_emsg_source()
{
    char_u      *Buf, *p;

    if (sourcing_name != NULL && other_sourcing_name())
    {
        p = (char_u *)_("Error detected while processing %s:");
        Buf = alloc((unsigned)(STRLEN(sourcing_name) + STRLEN(p)));
        if (Buf != NULL)
            sprintf((char *)Buf, (char *)p, sourcing_name);
        return Buf;
    }
    return NULL;
}

/*
 * Get the message about the source lnum, as used for an error message.
 * Returns an allocated string with room for one more character.
 * Returns NULL when no message is to be given.
 */
    static char_u *
get_emsg_lnum()
{
    char_u      *Buf, *p;

    /* lnum is 0 when executing a command from the command line
     * argument, we don't want a line number then */
    if (sourcing_name != NULL
            && (other_sourcing_name() || sourcing_lnum != last_sourcing_lnum)
            && sourcing_lnum != 0)
    {
        p = (char_u *)_("line %4ld:");
        Buf = alloc((unsigned)(STRLEN(p) + 20));
        if (Buf != NULL)
            sprintf((char *)Buf, (char *)p, (long)sourcing_lnum);
        return Buf;
    }
    return NULL;
}

/*
 * Display name and line number for the source of an error.
 * Remember the file name and line number, so that for the next error the info
 * is only displayed if it changed.
 */
    void
msg_source(attr)
    int         attr;
{
    char_u      *p;

    ++no_wait_return;
    p = get_emsg_source();
    if (p != NULL)
    {
        msg_attr(p, attr);
        vim_free(p);
    }
    p = get_emsg_lnum();
    if (p != NULL)
    {
        msg_attr(p, hl_attr(HLF_N));
        vim_free(p);
        last_sourcing_lnum = sourcing_lnum;  /* only once for each line */
    }

    /* remember the last sourcing name printed, also when it's empty */
    if (sourcing_name == NULL || other_sourcing_name())
    {
        vim_free(last_sourcing_name);
        if (sourcing_name == NULL)
            last_sourcing_name = NULL;
        else
            last_sourcing_name = vim_strsave(sourcing_name);
    }
    --no_wait_return;
}

/*
 * Return TRUE if not giving error messages right now:
 * If "emsg_off" is set: no error messages at the moment.
 * If "msg" is in 'debug': do error message but without side effects.
 * If "emsg_skip" is set: never do error messages.
 */
    int
emsg_not_now()
{
    if ((emsg_off > 0 && vim_strchr(p_debug, 'm') == NULL
                                          && vim_strchr(p_debug, 't') == NULL)
#ifdef FEAT_EVAL
            || emsg_skip > 0
#endif
            )
        return TRUE;
    return FALSE;
}

/*
 * emsg() - display an error message
 *
 * Rings the bell, if appropriate, and calls message() to do the real work
 * When terminal not initialized (yet) mch_errmsg(..) is used.
 *
 * return TRUE if wait_return not called
 */
    int
emsg(s)
    char_u      *s;
{
    int         attr;
    char_u      *p;
#ifdef FEAT_EVAL
    int         ignore = FALSE;
    int         severe;
#endif

    called_emsg = TRUE;
    ex_exitval = 1;

    /*
     * If "emsg_severe" is TRUE: When an error exception is to be thrown,
     * prefer this message over previous messages for the same command.
     */
#ifdef FEAT_EVAL
    severe = emsg_severe;
    emsg_severe = FALSE;
#endif

    /* Skip this if not giving error messages at the moment. */
    if (emsg_not_now())
        return TRUE;

    if (!emsg_off || vim_strchr(p_debug, 't') != NULL)
    {
#ifdef FEAT_EVAL
        /*
         * Cause a throw of an error exception if appropriate.  Don't display
         * the error message in this case.  (If no matching catch clause will
         * be found, the message will be displayed later on.)  "ignore" is set
         * when the message should be ignored completely (used for the
         * interrupt message).
         */
        if (cause_errthrow(s, severe, &ignore) == TRUE)
        {
            if (!ignore)
                did_emsg = TRUE;
            return TRUE;
        }

        /* set "v:errmsg", also when using ":silent! cmd" */
        set_vim_var_string(VV_ERRMSG, s, -1);
#endif

        /*
         * When using ":silent! cmd" ignore error messages.
         * But do write it to the redirection file.
         */
        if (emsg_silent != 0)
        {
            msg_start();
            p = get_emsg_source();
            if (p != NULL)
            {
                STRCAT(p, "\n");
                redir_write(p, -1);
                vim_free(p);
            }
            p = get_emsg_lnum();
            if (p != NULL)
            {
                STRCAT(p, "\n");
                redir_write(p, -1);
                vim_free(p);
            }
            redir_write(s, -1);
            return TRUE;
        }

        /* Reset msg_silent, an error causes messages to be switched back on. */
        msg_silent = 0;
        cmd_silent = FALSE;

        if (global_busy)                /* break :global command */
            ++global_busy;

        if (p_eb)
            beep_flush();               /* also includes flush_buffers() */
        else
            flush_buffers(FALSE);       /* flush internal buffers */
        did_emsg = TRUE;                /* flag for DoOneCmd() */
    }

    emsg_on_display = TRUE;     /* remember there is an error message */
    ++msg_scroll;               /* don't overwrite a previous message */
    attr = hl_attr(HLF_E);      /* set highlight mode for error messages */
    if (msg_scrolled != 0)
        need_wait_return = TRUE;    /* needed in case emsg() is called after
                                     * wait_return has reset need_wait_return
                                     * and a redraw is expected because
                                     * msg_scrolled is non-zero */

    /*
     * Display name and line number for the source of the error.
     */
    msg_source(attr);

    /*
     * Display the error message itself.
     */
    msg_nowait = FALSE;                 /* wait for this msg */
    return msg_attr(s, attr);
}

/*
 * Print an error message with one "%s" and one string argument.
 */
    int
emsg2(s, a1)
    char_u *s, *a1;
{
    return emsg3(s, a1, NULL);
}

/* emsg3() and emsgn() are in misc2.c to avoid warnings for the prototypes. */

    void
emsg_invreg(name)
    int     name;
{
    EMSG2(_("E354: Invalid register name: '%s'"), transchar(name));
}

/*
 * Like msg(), but truncate to a single line if p_shm contains 't', or when
 * "force" is TRUE.  This truncates in another way as for normal messages.
 * Careful: The string may be changed by msg_may_trunc()!
 * Returns a pointer to the printed message, if wait_return() not called.
 */
    char_u *
msg_trunc_attr(s, force, attr)
    char_u      *s;
    int         force;
    int         attr;
{
    int         n;

    /* Add message to history before truncating */
    add_msg_hist(s, -1, attr);

    s = msg_may_trunc(force, s);

    msg_hist_off = TRUE;
    n = msg_attr(s, attr);
    msg_hist_off = FALSE;

    if (n)
        return s;
    return NULL;
}

/*
 * Check if message "s" should be truncated at the start (for filenames).
 * Return a pointer to where the truncated message starts.
 * Note: May change the message by replacing a character with '<'.
 */
    char_u *
msg_may_trunc(force, s)
    int         force;
    char_u      *s;
{
    int         n;
    int         room;

    room = (int)(Rows - cmdline_row - 1) * Columns + sc_col - 1;
    if ((force || (shortmess(SHM_TRUNC) && !exmode_active))
            && (n = (int)STRLEN(s) - room) > 0)
    {
#ifdef FEAT_MBYTE
        if (has_mbyte)
        {
            int size = vim_strsize(s);

            /* There may be room anyway when there are multibyte chars. */
            if (size <= room)
                return s;

            for (n = 0; size >= room; )
            {
                size -= (*mb_ptr2cells)(s + n);
                n += (*mb_ptr2len)(s + n);
            }
            --n;
        }
#endif
        s += n;
        *s = '<';
    }
    return s;
}

    static void
add_msg_hist(s, len, attr)
    char_u      *s;
    int         len;            /* -1 for undetermined length */
    int         attr;
{
    struct msg_hist *p;

    if (msg_hist_off || msg_silent != 0)
        return;

    /* Don't let the message history get too big */
    while (msg_hist_len > MAX_MSG_HIST_LEN)
        (void)delete_first_msg();

    /* allocate an entry and add the message at the end of the history */
    p = (struct msg_hist *)alloc((int)sizeof(struct msg_hist));
    if (p != NULL)
    {
        if (len < 0)
            len = (int)STRLEN(s);
        /* remove leading and trailing newlines */
        while (len > 0 && *s == '\n')
        {
            ++s;
            --len;
        }
        while (len > 0 && s[len - 1] == '\n')
            --len;
        p->msg = vim_strnsave(s, len);
        p->next = NULL;
        p->attr = attr;
        if (last_msg_hist != NULL)
            last_msg_hist->next = p;
        last_msg_hist = p;
        if (first_msg_hist == NULL)
            first_msg_hist = last_msg_hist;
        ++msg_hist_len;
    }
}

/*
 * Delete the first (oldest) message from the history.
 * Returns FAIL if there are no messages.
 */
    int
delete_first_msg()
{
    struct msg_hist *p;

    if (msg_hist_len <= 0)
        return FAIL;
    p = first_msg_hist;
    first_msg_hist = p->next;
    if (first_msg_hist == NULL)
        last_msg_hist = NULL;  /* history is empty */
    vim_free(p->msg);
    vim_free(p);
    --msg_hist_len;
    return OK;
}

/*
 * ":messages" command.
 */
    void
ex_messages(eap)
    exarg_T     *eap UNUSED;
{
    struct msg_hist *p;
    char_u          *s;

    msg_hist_off = TRUE;

    s = mch_getenv((char_u *)"LANG");
    if (s != NULL && *s != NUL)
        msg_attr((char_u *)
                _("Messages maintainer: Bram Moolenaar <Bram@vim.org>"),
                hl_attr(HLF_T));

    for (p = first_msg_hist; p != NULL && !got_int; p = p->next)
        if (p->msg != NULL)
            msg_attr(p->msg, p->attr);

    msg_hist_off = FALSE;
}

#if defined(FEAT_CON_DIALOG) || defined(FIND_REPLACE_DIALOG) || defined(PROTO)
/*
 * Call this after prompting the user.  This will avoid a hit-return message
 * and a delay.
 */
    void
msg_end_prompt()
{
    need_wait_return = FALSE;
    emsg_on_display = FALSE;
    cmdline_row = msg_row;
    msg_col = 0;
    msg_clr_eos();
}
#endif

/*
 * wait for the user to hit a key (normally a return)
 * if 'redraw' is TRUE, clear and redraw the screen
 * if 'redraw' is FALSE, just redraw the screen
 * if 'redraw' is -1, don't redraw at all
 */
    void
wait_return(redraw)
    int         redraw;
{
    int         c;
    int         oldState;
    int         tmpState;
    int         had_got_int;

    if (redraw == TRUE)
        must_redraw = CLEAR;

    /* If using ":silent cmd", don't wait for a return.  Also don't set
     * need_wait_return to do it later. */
    if (msg_silent != 0)
        return;

/*
 * With the global command (and some others) we only need one return at the
 * end. Adjust cmdline_row to avoid the next message overwriting the last one.
 * When inside vgetc(), we can't wait for a typed character at all.
 */
    if (vgetc_busy > 0)
        return;
    if (no_wait_return)
    {
        need_wait_return = TRUE;
        if (!exmode_active)
            cmdline_row = msg_row;
        return;
    }

    redir_off = TRUE;           /* don't redirect this message */
    oldState = State;
    if (quit_more)
    {
        c = CAR;                /* just pretend CR was hit */
        quit_more = FALSE;
        got_int = FALSE;
    }
    else if (exmode_active)
    {
        MSG_PUTS(" ");          /* make sure the cursor is on the right line */
        c = CAR;                /* no need for a return in ex mode */
        got_int = FALSE;
    }
    else
    {
        /* Make sure the hit-return prompt is on screen when 'guioptions' was
         * just changed. */
        screenalloc(FALSE);

        State = HITRETURN;
#ifdef FEAT_MOUSE
        setmouse();
#endif
#ifdef USE_ON_FLY_SCROLL
        dont_scroll = TRUE;             /* disallow scrolling here */
#endif
        hit_return_msg();

        do
        {
            /* Remember "got_int", if it is set vgetc() probably returns a
             * CTRL-C, but we need to loop then. */
            had_got_int = got_int;

            /* Don't do mappings here, we put the character back in the
             * typeahead buffer. */
            ++no_mapping;
            ++allow_keys;
            c = safe_vgetc();
            if (had_got_int && !global_busy)
                got_int = FALSE;
            --no_mapping;
            --allow_keys;

#ifdef FEAT_CLIPBOARD
            /* Strange way to allow copying (yanking) a modeless selection at
             * the hit-enter prompt.  Use CTRL-Y, because the same is used in
             * Cmdline-mode and it's harmless when there is no selection. */
            if (c == Ctrl_Y && clip_star.state == SELECT_DONE)
            {
                clip_copy_modeless_selection(TRUE);
                c = K_IGNORE;
            }
#endif

            /*
             * Allow scrolling back in the messages.
             * Also accept scroll-down commands when messages fill the screen,
             * to avoid that typing one 'j' too many makes the messages
             * disappear.
             */
            if (p_more && !p_cp)
            {
                if (c == 'b' || c == 'k' || c == 'u' || c == 'g' || c == K_UP)
                {
                    /* scroll back to show older messages */
                    do_more_prompt(c);
                    if (quit_more)
                    {
                        c = CAR;                /* just pretend CR was hit */
                        quit_more = FALSE;
                        got_int = FALSE;
                    }
                    else
                    {
                        c = K_IGNORE;
                        hit_return_msg();
                    }
                }
                else if (msg_scrolled > Rows - 2
                         && (c == 'j' || c == K_DOWN || c == 'd' || c == 'f'))
                    c = K_IGNORE;
            }
        } while ((had_got_int && c == Ctrl_C)
                                || c == K_IGNORE
#ifdef FEAT_GUI
                                || c == K_VER_SCROLLBAR || c == K_HOR_SCROLLBAR
#endif
#ifdef FEAT_MOUSE
                                || c == K_LEFTDRAG   || c == K_LEFTRELEASE
                                || c == K_MIDDLEDRAG || c == K_MIDDLERELEASE
                                || c == K_RIGHTDRAG  || c == K_RIGHTRELEASE
                                || c == K_MOUSEDOWN  || c == K_MOUSEUP
                                || (!mouse_has(MOUSE_RETURN)
                                    && mouse_row < msg_row
                                    && (c == K_LEFTMOUSE
                                        || c == K_MIDDLEMOUSE
                                        || c == K_RIGHTMOUSE
                                        || c == K_X1MOUSE
                                        || c == K_X2MOUSE))
#endif
                                );
        ui_breakcheck();
#ifdef FEAT_MOUSE
        /*
         * Avoid that the mouse-up event causes visual mode to start.
         */
        if (c == K_LEFTMOUSE || c == K_MIDDLEMOUSE || c == K_RIGHTMOUSE
                                          || c == K_X1MOUSE || c == K_X2MOUSE)
            (void)jump_to_mouse(MOUSE_SETPOS, NULL, 0);
        else
#endif
            if (vim_strchr((char_u *)"\r\n ", c) == NULL && c != Ctrl_C)
        {
            /* Put the character back in the typeahead buffer.  Don't use the
             * stuff buffer, because lmaps wouldn't work. */
            ins_char_typebuf(c);
            do_redraw = TRUE;       /* need a redraw even though there is
                                       typeahead */
        }
    }
    redir_off = FALSE;

    /*
     * If the user hits ':', '?' or '/' we get a command line from the next
     * line.
     */
    if (c == ':' || c == '?' || c == '/')
    {
        if (!exmode_active)
            cmdline_row = msg_row;
        skip_redraw = TRUE;         /* skip redraw once */
        do_redraw = FALSE;
    }

    /*
     * If the window size changed set_shellsize() will redraw the screen.
     * Otherwise the screen is only redrawn if 'redraw' is set and no ':'
     * typed.
     */
    tmpState = State;
    State = oldState;               /* restore State before set_shellsize */
#ifdef FEAT_MOUSE
    setmouse();
#endif
    msg_check();

#if defined(UNIX) || defined(VMS)
    /*
     * When switching screens, we need to output an extra newline on exit.
     */
    if (swapping_screen() && !termcap_active)
        newline_on_exit = TRUE;
#endif

    need_wait_return = FALSE;
    did_wait_return = TRUE;
    emsg_on_display = FALSE;    /* can delete error message now */
    lines_left = -1;            /* reset lines_left at next msg_start() */
    reset_last_sourcing();
    if (keep_msg != NULL && vim_strsize(keep_msg) >=
                                  (Rows - cmdline_row - 1) * Columns + sc_col)
    {
        vim_free(keep_msg);
        keep_msg = NULL;            /* don't redisplay message, it's too long */
    }

    if (tmpState == SETWSIZE)       /* got resize event while in vgetc() */
    {
        starttermcap();             /* start termcap before redrawing */
        shell_resized();
    }
    else if (!skip_redraw
            && (redraw == TRUE || (msg_scrolled != 0 && redraw != -1)))
    {
        starttermcap();             /* start termcap before redrawing */
        redraw_later(VALID);
    }
}

/*
 * Write the hit-return prompt.
 */
    static void
hit_return_msg()
{
    int         save_p_more = p_more;

    p_more = FALSE;     /* don't want see this message when scrolling back */
    if (msg_didout)     /* start on a new line */
        msg_putchar('\n');
    if (got_int)
        MSG_PUTS(_("Interrupt: "));

    MSG_PUTS_ATTR(_("Press ENTER or type command to continue"), hl_attr(HLF_R));
    if (!msg_use_printf())
        msg_clr_eos();
    p_more = save_p_more;
}

/*
 * Set "keep_msg" to "s".  Free the old value and check for NULL pointer.
 */
    void
set_keep_msg(s, attr)
    char_u      *s;
    int         attr;
{
    vim_free(keep_msg);
    if (s != NULL && msg_silent == 0)
        keep_msg = vim_strsave(s);
    else
        keep_msg = NULL;
    keep_msg_more = FALSE;
    keep_msg_attr = attr;
}

#if defined(FEAT_TERMRESPONSE) || defined(PROTO)
/*
 * If there currently is a message being displayed, set "keep_msg" to it, so
 * that it will be displayed again after redraw.
 */
    void
set_keep_msg_from_hist()
{
    if (keep_msg == NULL && last_msg_hist != NULL && msg_scrolled == 0
                                                          && (State & NORMAL))
        set_keep_msg(last_msg_hist->msg, last_msg_hist->attr);
}
#endif

/*
 * Prepare for outputting characters in the command line.
 */
    void
msg_start()
{
    int         did_return = FALSE;

    vim_free(keep_msg);
    keep_msg = NULL;                    /* don't display old message now */

#ifdef FEAT_EVAL
    if (need_clr_eos)
    {
        /* Halfway an ":echo" command and getting an (error) message: clear
         * any text from the command. */
        need_clr_eos = FALSE;
        msg_clr_eos();
    }
#endif

    if (!msg_scroll && full_screen)     /* overwrite last message */
    {
        msg_row = cmdline_row;
        msg_col =
#ifdef FEAT_RIGHTLEFT
            cmdmsg_rl ? Columns - 1 :
#endif
            0;
    }
    else if (msg_didout)                    /* start message on next line */
    {
        msg_putchar('\n');
        did_return = TRUE;
        if (exmode_active != EXMODE_NORMAL)
            cmdline_row = msg_row;
    }
    if (!msg_didany || lines_left < 0)
        msg_starthere();
    if (msg_silent == 0)
    {
        msg_didout = FALSE;                 /* no output on current line yet */
        cursor_off();
    }

    /* when redirecting, may need to start a new line. */
    if (!did_return)
        redir_write((char_u *)"\n", -1);
}

/*
 * Note that the current msg position is where messages start.
 */
    void
msg_starthere()
{
    lines_left = cmdline_row;
    msg_didany = FALSE;
}

    void
msg_putchar(c)
    int         c;
{
    msg_putchar_attr(c, 0);
}

    void
msg_putchar_attr(c, attr)
    int         c;
    int         attr;
{
#ifdef FEAT_MBYTE
    char_u      buf[MB_MAXBYTES + 1];
#else
    char_u      buf[4];
#endif

    if (IS_SPECIAL(c))
    {
        buf[0] = K_SPECIAL;
        buf[1] = K_SECOND(c);
        buf[2] = K_THIRD(c);
        buf[3] = NUL;
    }
    else
    {
#ifdef FEAT_MBYTE
        buf[(*mb_char2bytes)(c, buf)] = NUL;
#else
        buf[0] = c;
        buf[1] = NUL;
#endif
    }
    msg_puts_attr(buf, attr);
}

    void
msg_outnum(n)
    long        n;
{
    char_u      buf[20];

    sprintf((char *)buf, "%ld", n);
    msg_puts(buf);
}

    void
msg_home_replace(fname)
    char_u      *fname;
{
    msg_home_replace_attr(fname, 0);
}

#if defined(FEAT_FIND_ID) || defined(PROTO)
    void
msg_home_replace_hl(fname)
    char_u      *fname;
{
    msg_home_replace_attr(fname, hl_attr(HLF_D));
}
#endif

    static void
msg_home_replace_attr(fname, attr)
    char_u  *fname;
    int     attr;
{
    char_u      *name;

    name = home_replace_save(NULL, fname);
    if (name != NULL)
        msg_outtrans_attr(name, attr);
    vim_free(name);
}

/*
 * Output 'len' characters in 'str' (including NULs) with translation
 * if 'len' is -1, output upto a NUL character.
 * Use attributes 'attr'.
 * Return the number of characters it takes on the screen.
 */
    int
msg_outtrans(str)
    char_u          *str;
{
    return msg_outtrans_attr(str, 0);
}

    int
msg_outtrans_attr(str, attr)
    char_u      *str;
    int         attr;
{
    return msg_outtrans_len_attr(str, (int)STRLEN(str), attr);
}

    int
msg_outtrans_len(str, len)
    char_u      *str;
    int         len;
{
    return msg_outtrans_len_attr(str, len, 0);
}

/*
 * Output one character at "p".  Return pointer to the next character.
 * Handles multi-byte characters.
 */
    char_u *
msg_outtrans_one(p, attr)
    char_u      *p;
    int         attr;
{
#ifdef FEAT_MBYTE
    int         l;

    if (has_mbyte && (l = (*mb_ptr2len)(p)) > 1)
    {
        msg_outtrans_len_attr(p, l, attr);
        return p + l;
    }
#endif
    msg_puts_attr(transchar_byte(*p), attr);
    return p + 1;
}

    int
msg_outtrans_len_attr(msgstr, len, attr)
    char_u      *msgstr;
    int         len;
    int         attr;
{
    int         retval = 0;
    char_u      *str = msgstr;
    char_u      *plain_start = msgstr;
    char_u      *s;
#ifdef FEAT_MBYTE
    int         mb_l;
    int         c;
#endif

    /* if MSG_HIST flag set, add message to history */
    if (attr & MSG_HIST)
    {
        add_msg_hist(str, len, attr);
        attr &= ~MSG_HIST;
    }

#ifdef FEAT_MBYTE
    /* If the string starts with a composing character first draw a space on
     * which the composing char can be drawn. */
    if (enc_utf8 && utf_iscomposing(utf_ptr2char(msgstr)))
        msg_puts_attr((char_u *)" ", attr);
#endif

    /*
     * Go over the string.  Special characters are translated and printed.
     * Normal characters are printed several at a time.
     */
    while (--len >= 0)
    {
#ifdef FEAT_MBYTE
        if (enc_utf8)
            /* Don't include composing chars after the end. */
            mb_l = utfc_ptr2len_len(str, len + 1);
        else if (has_mbyte)
            mb_l = (*mb_ptr2len)(str);
        else
            mb_l = 1;
        if (has_mbyte && mb_l > 1)
        {
            c = (*mb_ptr2char)(str);
            if (vim_isprintc(c))
                /* printable multi-byte char: count the cells. */
                retval += (*mb_ptr2cells)(str);
            else
            {
                /* unprintable multi-byte char: print the printable chars so
                 * far and the translation of the unprintable char. */
                if (str > plain_start)
                    msg_puts_attr_len(plain_start, (int)(str - plain_start),
                                                                        attr);
                plain_start = str + mb_l;
                msg_puts_attr(transchar(c), attr == 0 ? hl_attr(HLF_8) : attr);
                retval += char2cells(c);
            }
            len -= mb_l - 1;
            str += mb_l;
        }
        else
#endif
        {
            s = transchar_byte(*str);
            if (s[1] != NUL)
            {
                /* unprintable char: print the printable chars so far and the
                 * translation of the unprintable char. */
                if (str > plain_start)
                    msg_puts_attr_len(plain_start, (int)(str - plain_start),
                                                                        attr);
                plain_start = str + 1;
                msg_puts_attr(s, attr == 0 ? hl_attr(HLF_8) : attr);
                retval += (int)STRLEN(s);
            }
            else
                ++retval;
            ++str;
        }
    }

    if (str > plain_start)
        /* print the printable chars at the end */
        msg_puts_attr_len(plain_start, (int)(str - plain_start), attr);

    return retval;
}

#if defined(FEAT_QUICKFIX) || defined(PROTO)
    void
msg_make(arg)
    char_u  *arg;
{
    int     i;
    static char_u *str = (char_u *)"eeffoc", *rs = (char_u *)"Plon#dqg#vxjduB";

    arg = skipwhite(arg);
    for (i = 5; *arg && i >= 0; --i)
        if (*arg++ != str[i])
            break;
    if (i < 0)
    {
        msg_putchar('\n');
        for (i = 0; rs[i]; ++i)
            msg_putchar(rs[i] - 3);
    }
}
#endif

/*
 * Output the string 'str' upto a NUL character.
 * Return the number of characters it takes on the screen.
 *
 * If K_SPECIAL is encountered, then it is taken in conjunction with the
 * following character and shown as <F1>, <S-Up> etc.  Any other character
 * which is not printable shown in <> form.
 * If 'from' is TRUE (lhs of a mapping), a space is shown as <Space>.
 * If a character is displayed in one of these special ways, is also
 * highlighted (its highlight name is '8' in the p_hl variable).
 * Otherwise characters are not highlighted.
 * This function is used to show mappings, where we want to see how to type
 * the character/string -- webb
 */
    int
msg_outtrans_special(strstart, from)
    char_u      *strstart;
    int         from;   /* TRUE for lhs of a mapping */
{
    char_u      *str = strstart;
    int         retval = 0;
    char_u      *string;
    int         attr;
    int         len;

    attr = hl_attr(HLF_8);
    while (*str != NUL)
    {
        /* Leading and trailing spaces need to be displayed in <> form. */
        if ((str == strstart || str[1] == NUL) && *str == ' ')
        {
            string = (char_u *)"<Space>";
            ++str;
        }
        else
            string = str2special(&str, from);
        len = vim_strsize(string);
        /* Highlight special keys */
        msg_puts_attr(string, len > 1
#ifdef FEAT_MBYTE
                && (*mb_ptr2len)(string) <= 1
#endif
                ? attr : 0);
        retval += len;
    }
    return retval;
}

/*
 * Return the printable string for the key codes at "*sp".
 * Used for translating the lhs or rhs of a mapping to printable chars.
 * Advances "sp" to the next code.
 */
    char_u *
str2special(sp, from)
    char_u      **sp;
    int         from;   /* TRUE for lhs of mapping */
{
    int                 c;
    static char_u       buf[7];
    char_u              *str = *sp;
    int                 modifiers = 0;
    int                 special = FALSE;

#ifdef FEAT_MBYTE
    if (has_mbyte)
    {
        char_u  *p;

        /* Try to un-escape a multi-byte character.  Return the un-escaped
         * string if it is a multi-byte character. */
        p = mb_unescape(sp);
        if (p != NULL)
            return p;
    }
#endif

    c = *str;
    if (c == K_SPECIAL && str[1] != NUL && str[2] != NUL)
    {
        if (str[1] == KS_MODIFIER)
        {
            modifiers = str[2];
            str += 3;
            c = *str;
        }
        if (c == K_SPECIAL && str[1] != NUL && str[2] != NUL)
        {
            c = TO_SPECIAL(str[1], str[2]);
            str += 2;
            if (c == K_ZERO)    /* display <Nul> as ^@ */
                c = NUL;
        }
        if (IS_SPECIAL(c) || modifiers) /* special key */
            special = TRUE;
    }
    *sp = str + 1;

#ifdef FEAT_MBYTE
    /* For multi-byte characters check for an illegal byte. */
    if (has_mbyte && MB_BYTE2LEN(*str) > (*mb_ptr2len)(str))
    {
        transchar_nonprint(buf, c);
        return buf;
    }
#endif

    /* Make unprintable characters in <> form, also <M-Space> and <Tab>.
     * Use <Space> only for lhs of a mapping. */
    if (special || char2cells(c) > 1 || (from && c == ' '))
        return get_special_key_name(c, modifiers);
    buf[0] = c;
    buf[1] = NUL;
    return buf;
}

/*
 * Translate a key sequence into special key names.
 */
    void
str2specialbuf(sp, buf, len)
    char_u      *sp;
    char_u      *buf;
    int         len;
{
    char_u      *s;

    *buf = NUL;
    while (*sp)
    {
        s = str2special(&sp, FALSE);
        if ((int)(STRLEN(s) + STRLEN(buf)) < len)
            STRCAT(buf, s);
    }
}

/*
 * print line for :print or :list command
 */
    void
msg_prt_line(s, list)
    char_u      *s;
    int         list;
{
    int         c;
    int         col = 0;
    int         n_extra = 0;
    int         c_extra = 0;
    char_u      *p_extra = NULL;            /* init to make SASC shut up */
    int         n;
    int         attr = 0;
    char_u      *trail = NULL;
#ifdef FEAT_MBYTE
    int         l;
    char_u      buf[MB_MAXBYTES + 1];
#endif

    if (curwin->w_p_list)
        list = TRUE;

    /* find start of trailing whitespace */
    if (list && lcs_trail)
    {
        trail = s + STRLEN(s);
        while (trail > s && vim_iswhite(trail[-1]))
            --trail;
    }

    /* output a space for an empty line, otherwise the line will be
     * overwritten */
    if (*s == NUL && !(list && lcs_eol != NUL))
        msg_putchar(' ');

    while (!got_int)
    {
        if (n_extra > 0)
        {
            --n_extra;
            if (c_extra)
                c = c_extra;
            else
                c = *p_extra++;
        }
#ifdef FEAT_MBYTE
        else if (has_mbyte && (l = (*mb_ptr2len)(s)) > 1)
        {
            col += (*mb_ptr2cells)(s);
            mch_memmove(buf, s, (size_t)l);
            buf[l] = NUL;
            msg_puts(buf);
            s += l;
            continue;
        }
#endif
        else
        {
            attr = 0;
            c = *s++;
            if (c == TAB && (!list || lcs_tab1))
            {
                /* tab amount depends on current column */
#ifdef FEAT_VARTABS
                n_extra = tabstop_padding(col, curbuf->b_p_ts, curbuf->b_p_vts_ary) - 1;
#else
                n_extra = curbuf->b_p_ts - col % curbuf->b_p_ts - 1;
#endif
                if (!list)
                {
                    c = ' ';
                    c_extra = ' ';
                }
                else
                {
                    c = lcs_tab1;
                    c_extra = lcs_tab2;
                    attr = hl_attr(HLF_8);
                }
            }
            else if (c == NUL && list && lcs_eol != NUL)
            {
                p_extra = (char_u *)"";
                c_extra = NUL;
                n_extra = 1;
                c = lcs_eol;
                attr = hl_attr(HLF_AT);
                --s;
            }
            else if (c != NUL && (n = byte2cells(c)) > 1)
            {
                n_extra = n - 1;
                p_extra = transchar_byte(c);
                c_extra = NUL;
                c = *p_extra++;
                /* Use special coloring to be able to distinguish <hex> from
                 * the same in plain text. */
                attr = hl_attr(HLF_8);
            }
            else if (c == ' ' && trail != NULL && s > trail)
            {
                c = lcs_trail;
                attr = hl_attr(HLF_8);
            }
        }

        if (c == NUL)
            break;

        msg_putchar_attr(c, attr);
        col++;
    }
    msg_clr_eos();
}

#ifdef FEAT_MBYTE
/*
 * Use screen_puts() to output one multi-byte character.
 * Return the pointer "s" advanced to the next character.
 */
    static char_u *
screen_puts_mbyte(s, l, attr)
    char_u      *s;
    int         l;
    int         attr;
{
    int         cw;

    msg_didout = TRUE;          /* remember that line is not empty */
    cw = (*mb_ptr2cells)(s);
    if (cw > 1 && (
#ifdef FEAT_RIGHTLEFT
                cmdmsg_rl ? msg_col <= 1 :
#endif
                msg_col == Columns - 1))
    {
        /* Doesn't fit, print a highlighted '>' to fill it up. */
        msg_screen_putchar('>', hl_attr(HLF_AT));
        return s;
    }

    screen_puts_len(s, l, msg_row, msg_col, attr);
#ifdef FEAT_RIGHTLEFT
    if (cmdmsg_rl)
    {
        msg_col -= cw;
        if (msg_col == 0)
        {
            msg_col = Columns;
            ++msg_row;
        }
    }
    else
#endif
    {
        msg_col += cw;
        if (msg_col >= Columns)
        {
            msg_col = 0;
            ++msg_row;
        }
    }
    return s + l;
}
#endif

/*
 * Output a string to the screen at position msg_row, msg_col.
 * Update msg_row and msg_col for the next message.
 */
    void
msg_puts(s)
    char_u      *s;
{
    msg_puts_attr(s, 0);
}

    void
msg_puts_title(s)
    char_u      *s;
{
    msg_puts_attr(s, hl_attr(HLF_T));
}

/*
 * Show a message in such a way that it always fits in the line.  Cut out a
 * part in the middle and replace it with "..." when necessary.
 * Does not handle multi-byte characters!
 */
    void
msg_puts_long_attr(longstr, attr)
    char_u      *longstr;
    int         attr;
{
    msg_puts_long_len_attr(longstr, (int)STRLEN(longstr), attr);
}

    void
msg_puts_long_len_attr(longstr, len, attr)
    char_u      *longstr;
    int         len;
    int         attr;
{
    int         slen = len;
    int         room;

    room = Columns - msg_col;
    if (len > room && room >= 20)
    {
        slen = (room - 3) / 2;
        msg_outtrans_len_attr(longstr, slen, attr);
        msg_puts_attr((char_u *)"...", hl_attr(HLF_8));
    }
    msg_outtrans_len_attr(longstr + len - slen, slen, attr);
}

/*
 * Basic function for writing a message with highlight attributes.
 */
    void
msg_puts_attr(s, attr)
    char_u      *s;
    int         attr;
{
    msg_puts_attr_len(s, -1, attr);
}

/*
 * Like msg_puts_attr(), but with a maximum length "maxlen" (in bytes).
 * When "maxlen" is -1 there is no maximum length.
 * When "maxlen" is >= 0 the message is not put in the history.
 */
    static void
msg_puts_attr_len(str, maxlen, attr)
    char_u      *str;
    int         maxlen;
    int         attr;
{
    /*
     * If redirection is on, also write to the redirection file.
     */
    redir_write(str, maxlen);

    /*
     * Don't print anything when using ":silent cmd".
     */
    if (msg_silent != 0)
        return;

    /* if MSG_HIST flag set, add message to history */
    if ((attr & MSG_HIST) && maxlen < 0)
    {
        add_msg_hist(str, -1, attr);
        attr &= ~MSG_HIST;
    }

    /*
     * When writing something to the screen after it has scrolled, requires a
     * wait-return prompt later.  Needed when scrolling, resetting
     * need_wait_return after some prompt, and then outputting something
     * without scrolling
     */
    if (msg_scrolled != 0 && !msg_scrolled_ign)
        need_wait_return = TRUE;
    msg_didany = TRUE;          /* remember that something was outputted */

    /*
     * If there is no valid screen, use fprintf so we can see error messages.
     * If termcap is not active, we may be writing in an alternate console
     * window, cursor positioning may not work correctly (window size may be
     * different, e.g. for Win32 console) or we just don't know where the
     * cursor is.
     */
    if (msg_use_printf())
        msg_puts_printf(str, maxlen);
    else
        msg_puts_display(str, maxlen, attr, FALSE);
}

/*
 * The display part of msg_puts_attr_len().
 * May be called recursively to display scroll-back text.
 */
    static void
msg_puts_display(str, maxlen, attr, recurse)
    char_u      *str;
    int         maxlen;
    int         attr;
    int         recurse;
{
    char_u      *s = str;
    char_u      *t_s = str;     /* string from "t_s" to "s" is still todo */
    int         t_col = 0;      /* screen cells todo, 0 when "t_s" not used */
#ifdef FEAT_MBYTE
    int         l;
    int         cw;
#endif
    char_u      *sb_str = str;
    int         sb_col = msg_col;
    int         wrap;
    int         did_last_char;

    did_wait_return = FALSE;
    while ((maxlen < 0 || (int)(s - str) < maxlen) && *s != NUL)
    {
        /*
         * We are at the end of the screen line when:
         * - When outputting a newline.
         * - When outputting a character in the last column.
         */
        if (!recurse && msg_row >= Rows - 1 && (*s == '\n' || (
#ifdef FEAT_RIGHTLEFT
                    cmdmsg_rl
                    ? (
                        msg_col <= 1
                        || (*s == TAB && msg_col <= 7)
# ifdef FEAT_MBYTE
                        || (has_mbyte && (*mb_ptr2cells)(s) > 1 && msg_col <= 2)
# endif
                      )
                    :
#endif
                      (msg_col + t_col >= Columns - 1
                       || (*s == TAB && msg_col + t_col >= ((Columns - 1) & ~7))
# ifdef FEAT_MBYTE
                       || (has_mbyte && (*mb_ptr2cells)(s) > 1
                                            && msg_col + t_col >= Columns - 2)
# endif
                      ))))
        {
            /*
             * The screen is scrolled up when at the last row (some terminals
             * scroll automatically, some don't.  To avoid problems we scroll
             * ourselves).
             */
            if (t_col > 0)
                /* output postponed text */
                t_puts(&t_col, t_s, s, attr);

            /* When no more prompt and no more room, truncate here */
            if (msg_no_more && lines_left == 0)
                break;

            /* Scroll the screen up one line. */
            msg_scroll_up();

            msg_row = Rows - 2;
            if (msg_col >= Columns)     /* can happen after screen resize */
                msg_col = Columns - 1;

            /* Display char in last column before showing more-prompt. */
            if (*s >= ' '
#ifdef FEAT_RIGHTLEFT
                    && !cmdmsg_rl
#endif
               )
            {
#ifdef FEAT_MBYTE
                if (has_mbyte)
                {
                    if (enc_utf8 && maxlen >= 0)
                        /* avoid including composing chars after the end */
                        l = utfc_ptr2len_len(s, (int)((str + maxlen) - s));
                    else
                        l = (*mb_ptr2len)(s);
                    s = screen_puts_mbyte(s, l, attr);
                }
                else
#endif
                    msg_screen_putchar(*s++, attr);
                did_last_char = TRUE;
            }
            else
                did_last_char = FALSE;

            if (p_more)
                /* store text for scrolling back */
                store_sb_text(&sb_str, s, attr, &sb_col, TRUE);

            inc_msg_scrolled();
            need_wait_return = TRUE; /* may need wait_return in main() */
            if (must_redraw < VALID)
                must_redraw = VALID;
            redraw_cmdline = TRUE;
            if (cmdline_row > 0 && !exmode_active)
                --cmdline_row;

            /*
             * If screen is completely filled and 'more' is set then wait
             * for a character.
             */
            if (lines_left > 0)
                --lines_left;
            if (p_more && lines_left == 0 && State != HITRETURN
                                            && !msg_no_more && !exmode_active)
            {
#ifdef FEAT_CON_DIALOG
                if (do_more_prompt(NUL))
                    s = confirm_msg_tail;
#else
                (void)do_more_prompt(NUL);
#endif
                if (quit_more)
                    return;
            }

            /* When we displayed a char in last column need to check if there
             * is still more. */
            if (did_last_char)
                continue;
        }

        wrap = *s == '\n'
                    || msg_col + t_col >= Columns
#ifdef FEAT_MBYTE
                    || (has_mbyte && (*mb_ptr2cells)(s) > 1
                                            && msg_col + t_col >= Columns - 1)
#endif
                    ;
        if (t_col > 0 && (wrap || *s == '\r' || *s == '\b'
                                                 || *s == '\t' || *s == BELL))
            /* output any postponed text */
            t_puts(&t_col, t_s, s, attr);

        if (wrap && p_more && !recurse)
            /* store text for scrolling back */
            store_sb_text(&sb_str, s, attr, &sb_col, TRUE);

        if (*s == '\n')             /* go to next line */
        {
            msg_didout = FALSE;     /* remember that line is empty */
#ifdef FEAT_RIGHTLEFT
            if (cmdmsg_rl)
                msg_col = Columns - 1;
            else
#endif
                msg_col = 0;
            if (++msg_row >= Rows)  /* safety check */
                msg_row = Rows - 1;
        }
        else if (*s == '\r')        /* go to column 0 */
        {
            msg_col = 0;
        }
        else if (*s == '\b')        /* go to previous char */
        {
            if (msg_col)
                --msg_col;
        }
        else if (*s == TAB)         /* translate Tab into spaces */
        {
            do
                msg_screen_putchar(' ', attr);
            while (msg_col & 7);
        }
        else if (*s == BELL)        /* beep (from ":sh") */
            vim_beep();
        else
        {
#ifdef FEAT_MBYTE
            if (has_mbyte)
            {
                cw = (*mb_ptr2cells)(s);
                if (enc_utf8 && maxlen >= 0)
                    /* avoid including composing chars after the end */
                    l = utfc_ptr2len_len(s, (int)((str + maxlen) - s));
                else
                    l = (*mb_ptr2len)(s);
            }
            else
            {
                cw = 1;
                l = 1;
            }
#endif
            /* When drawing from right to left or when a double-wide character
             * doesn't fit, draw a single character here.  Otherwise collect
             * characters and draw them all at once later. */
#if defined(FEAT_RIGHTLEFT) || defined(FEAT_MBYTE)
            if (
# ifdef FEAT_RIGHTLEFT
                    cmdmsg_rl
#  ifdef FEAT_MBYTE
                    ||
#  endif
# endif
# ifdef FEAT_MBYTE
                    (cw > 1 && msg_col + t_col >= Columns - 1)
# endif
                    )
            {
# ifdef FEAT_MBYTE
                if (l > 1)
                    s = screen_puts_mbyte(s, l, attr) - 1;
                else
# endif
                    msg_screen_putchar(*s, attr);
            }
            else
#endif
            {
                /* postpone this character until later */
                if (t_col == 0)
                    t_s = s;
#ifdef FEAT_MBYTE
                t_col += cw;
                s += l - 1;
#else
                ++t_col;
#endif
            }
        }
        ++s;
    }

    /* output any postponed text */
    if (t_col > 0)
        t_puts(&t_col, t_s, s, attr);
    if (p_more && !recurse)
        store_sb_text(&sb_str, s, attr, &sb_col, FALSE);

    msg_check();
}

/*
 * Scroll the screen up one line for displaying the next message line.
 */
    static void
msg_scroll_up()
{
#ifdef FEAT_GUI
    /* Remove the cursor before scrolling, ScreenLines[] is going
     * to become invalid. */
    if (gui.in_use)
        gui_undraw_cursor();
#endif
    /* scrolling up always works */
    screen_del_lines(0, 0, 1, (int)Rows, TRUE, NULL);

    if (!can_clear((char_u *)" "))
    {
        /* Scrolling up doesn't result in the right background.  Set the
         * background here.  It's not efficient, but avoids that we have to do
         * it all over the code. */
        screen_fill((int)Rows - 1, (int)Rows, 0, (int)Columns, ' ', ' ', 0);

        /* Also clear the last char of the last but one line if it was not
         * cleared before to avoid a scroll-up. */
        if (ScreenAttrs[LineOffset[Rows - 2] + Columns - 1] == (sattr_T)-1)
            screen_fill((int)Rows - 2, (int)Rows - 1,
                                 (int)Columns - 1, (int)Columns, ' ', ' ', 0);
    }
}

/*
 * Increment "msg_scrolled".
 */
    static void
inc_msg_scrolled()
{
#ifdef FEAT_EVAL
    if (*get_vim_var_str(VV_SCROLLSTART) == NUL)
    {
        char_u      *p = sourcing_name;
        char_u      *tofree = NULL;
        int         len;

        /* v:scrollstart is empty, set it to the script/function name and line
         * number */
        if (p == NULL)
            p = (char_u *)_("Unknown");
        else
        {
            len = (int)STRLEN(p) + 40;
            tofree = alloc(len);
            if (tofree != NULL)
            {
                vim_snprintf((char *)tofree, len, _("%s line %ld"),
                                                      p, (long)sourcing_lnum);
                p = tofree;
            }
        }
        set_vim_var_string(VV_SCROLLSTART, p, -1);
        vim_free(tofree);
    }
#endif
    ++msg_scrolled;
}

/*
 * To be able to scroll back at the "more" and "hit-enter" prompts we need to
 * store the displayed text and remember where screen lines start.
 */
typedef struct msgchunk_S msgchunk_T;
struct msgchunk_S
{
    msgchunk_T  *sb_next;
    msgchunk_T  *sb_prev;
    char        sb_eol;         /* TRUE when line ends after this text */
    int         sb_msg_col;     /* column in which text starts */
    int         sb_attr;        /* text attributes */
    char_u      sb_text[1];     /* text to be displayed, actually longer */
};

static msgchunk_T *last_msgchunk = NULL; /* last displayed text */

static msgchunk_T *msg_sb_start __ARGS((msgchunk_T *mps));
static msgchunk_T *disp_sb_line __ARGS((int row, msgchunk_T *smp));

static int do_clear_sb_text = FALSE;    /* clear text on next msg */

/*
 * Store part of a printed message for displaying when scrolling back.
 */
    static void
store_sb_text(sb_str, s, attr, sb_col, finish)
    char_u      **sb_str;       /* start of string */
    char_u      *s;             /* just after string */
    int         attr;
    int         *sb_col;
    int         finish;         /* line ends */
{
    msgchunk_T  *mp;

    if (do_clear_sb_text)
    {
        clear_sb_text();
        do_clear_sb_text = FALSE;
    }

    if (s > *sb_str)
    {
        mp = (msgchunk_T *)alloc((int)(sizeof(msgchunk_T) + (s - *sb_str)));
        if (mp != NULL)
        {
            mp->sb_eol = finish;
            mp->sb_msg_col = *sb_col;
            mp->sb_attr = attr;
            vim_strncpy(mp->sb_text, *sb_str, s - *sb_str);

            if (last_msgchunk == NULL)
            {
                last_msgchunk = mp;
                mp->sb_prev = NULL;
            }
            else
            {
                mp->sb_prev = last_msgchunk;
                last_msgchunk->sb_next = mp;
                last_msgchunk = mp;
            }
            mp->sb_next = NULL;
        }
    }
    else if (finish && last_msgchunk != NULL)
        last_msgchunk->sb_eol = TRUE;

    *sb_str = s;
    *sb_col = 0;
}

/*
 * Finished showing messages, clear the scroll-back text on the next message.
 */
    void
may_clear_sb_text()
{
    do_clear_sb_text = TRUE;
}

/*
 * Clear any text remembered for scrolling back.
 * Called when redrawing the screen.
 */
    void
clear_sb_text()
{
    msgchunk_T  *mp;

    while (last_msgchunk != NULL)
    {
        mp = last_msgchunk->sb_prev;
        vim_free(last_msgchunk);
        last_msgchunk = mp;
    }
}

/*
 * "g<" command.
 */
    void
show_sb_text()
{
    msgchunk_T  *mp;

    /* Only show something if there is more than one line, otherwise it looks
     * weird, typing a command without output results in one line. */
    mp = msg_sb_start(last_msgchunk);
    if (mp == NULL || mp->sb_prev == NULL)
        vim_beep();
    else
    {
        do_more_prompt('G');
        wait_return(FALSE);
    }
}

/*
 * Move to the start of screen line in already displayed text.
 */
    static msgchunk_T *
msg_sb_start(mps)
    msgchunk_T *mps;
{
    msgchunk_T *mp = mps;

    while (mp != NULL && mp->sb_prev != NULL && !mp->sb_prev->sb_eol)
        mp = mp->sb_prev;
    return mp;
}

/*
 * Display a screen line from previously displayed text at row "row".
 * Returns a pointer to the text for the next line (can be NULL).
 */
    static msgchunk_T *
disp_sb_line(row, smp)
    int         row;
    msgchunk_T  *smp;
{
    msgchunk_T  *mp = smp;
    char_u      *p;

    for (;;)
    {
        msg_row = row;
        msg_col = mp->sb_msg_col;
        p = mp->sb_text;
        if (*p == '\n')     /* don't display the line break */
            ++p;
        msg_puts_display(p, -1, mp->sb_attr, TRUE);
        if (mp->sb_eol || mp->sb_next == NULL)
            break;
        mp = mp->sb_next;
    }
    return mp->sb_next;
}

/*
 * Output any postponed text for msg_puts_attr_len().
 */
    static void
t_puts(t_col, t_s, s, attr)
    int         *t_col;
    char_u      *t_s;
    char_u      *s;
    int         attr;
{
    /* output postponed text */
    msg_didout = TRUE;          /* remember that line is not empty */
    screen_puts_len(t_s, (int)(s - t_s), msg_row, msg_col, attr);
    msg_col += *t_col;
    *t_col = 0;
#ifdef FEAT_MBYTE
    /* If the string starts with a composing character don't increment the
     * column position for it. */
    if (enc_utf8 && utf_iscomposing(utf_ptr2char(t_s)))
        --msg_col;
#endif
    if (msg_col >= Columns)
    {
        msg_col = 0;
        ++msg_row;
    }
}

/*
 * Returns TRUE when messages should be printed with mch_errmsg().
 * This is used when there is no valid screen, so we can see error messages.
 * If termcap is not active, we may be writing in an alternate console
 * window, cursor positioning may not work correctly (window size may be
 * different, e.g. for Win32 console) or we just don't know where the
 * cursor is.
 */
    int
msg_use_printf()
{
    return (!msg_check_screen()
#if defined(WIN3264) && !defined(FEAT_GUI_MSWIN)
            || !termcap_active
#endif
            || (swapping_screen() && !termcap_active)
               );
}

/*
 * Print a message when there is no valid screen.
 */
    static void
msg_puts_printf(str, maxlen)
    char_u      *str;
    int         maxlen;
{
    char_u      *s = str;
    char_u      buf[4];
    char_u      *p;

#ifdef WIN3264
    if (!(silent_mode && p_verbose == 0))
        mch_settmode(TMODE_COOK);       /* handle '\r' and '\n' correctly */
#endif
    while (*s != NUL && (maxlen < 0 || (int)(s - str) < maxlen))
    {
        if (!(silent_mode && p_verbose == 0))
        {
            /* NL --> CR NL translation (for Unix, not for "--version") */
            /* NL --> CR translation (for Mac) */
            p = &buf[0];
            if (*s == '\n' && !info_message)
                *p++ = '\r';
#if defined(USE_CR) && !defined(MACOS_X_UNIX)
            else
#endif
                *p++ = *s;
            *p = '\0';
            if (info_message)   /* informative message, not an error */
                mch_msg((char *)buf);
            else
                mch_errmsg((char *)buf);
        }

        /* primitive way to compute the current column */
#ifdef FEAT_RIGHTLEFT
        if (cmdmsg_rl)
        {
            if (*s == '\r' || *s == '\n')
                msg_col = Columns - 1;
            else
                --msg_col;
        }
        else
#endif
        {
            if (*s == '\r' || *s == '\n')
                msg_col = 0;
            else
                ++msg_col;
        }
        ++s;
    }
    msg_didout = TRUE;      /* assume that line is not empty */

#ifdef WIN3264
    if (!(silent_mode && p_verbose == 0))
        mch_settmode(TMODE_RAW);
#endif
}

/*
 * Show the more-prompt and handle the user response.
 * This takes care of scrolling back and displaying previously displayed text.
 * When at hit-enter prompt "typed_char" is the already typed character,
 * otherwise it's NUL.
 * Returns TRUE when jumping ahead to "confirm_msg_tail".
 */
    static int
do_more_prompt(typed_char)
    int         typed_char;
{
    int         used_typed_char = typed_char;
    int         oldState = State;
    int         c;
#ifdef FEAT_CON_DIALOG
    int         retval = FALSE;
#endif
    int         scroll;
    msgchunk_T  *mp_last = NULL;
    msgchunk_T  *mp;
    int         i;

    if (typed_char == 'G')
    {
        /* "g<": Find first line on the last page. */
        mp_last = msg_sb_start(last_msgchunk);
        for (i = 0; i < Rows - 2 && mp_last != NULL
                                             && mp_last->sb_prev != NULL; ++i)
            mp_last = msg_sb_start(mp_last->sb_prev);
    }

    State = ASKMORE;
#ifdef FEAT_MOUSE
    setmouse();
#endif
    if (typed_char == NUL)
        msg_moremsg(FALSE);
    for (;;)
    {
        /*
         * Get a typed character directly from the user.
         */
        if (used_typed_char != NUL)
        {
            c = used_typed_char;        /* was typed at hit-enter prompt */
            used_typed_char = NUL;
        }
        else
            c = get_keystroke();

#if defined(FEAT_MENU) && defined(FEAT_GUI)
        if (c == K_MENU)
        {
            int idx = get_menu_index(current_menu, ASKMORE);

            /* Used a menu.  If it starts with CTRL-Y, it must
             * be a "Copy" for the clipboard.  Otherwise
             * assume that we end */
            if (idx == MENU_INDEX_INVALID)
                continue;
            c = *current_menu->strings[idx];
            if (c != NUL && current_menu->strings[idx][1] != NUL)
                ins_typebuf(current_menu->strings[idx] + 1,
                                current_menu->noremap[idx], 0, TRUE,
                                                   current_menu->silent[idx]);
        }
#endif

        scroll = 0;
        switch (c)
        {
        case BS:                /* scroll one line back */
        case K_BS:
        case 'k':
        case K_UP:
            scroll = -1;
            break;

        case CAR:               /* one extra line */
        case NL:
        case 'j':
        case K_DOWN:
            scroll = 1;
            break;

        case 'u':               /* Up half a page */
            scroll = -(Rows / 2);
            break;

        case 'd':               /* Down half a page */
            scroll = Rows / 2;
            break;

        case 'b':               /* one page back */
        case K_PAGEUP:
            scroll = -(Rows - 1);
            break;

        case ' ':               /* one extra page */
        case 'f':
        case K_PAGEDOWN:
        case K_LEFTMOUSE:
            scroll = Rows - 1;
            break;

        case 'g':               /* all the way back to the start */
            scroll = -999999;
            break;

        case 'G':               /* all the way to the end */
            scroll = 999999;
            lines_left = 999999;
            break;

        case ':':               /* start new command line */
#ifdef FEAT_CON_DIALOG
            if (!confirm_msg_used)
#endif
            {
                /* Since got_int is set all typeahead will be flushed, but we
                 * want to keep this ':', remember that in a special way. */
                typeahead_noflush(':');
                cmdline_row = Rows - 1;         /* put ':' on this line */
                skip_redraw = TRUE;             /* skip redraw once */
                need_wait_return = FALSE;       /* don't wait in main() */
            }
            /*FALLTHROUGH*/
        case 'q':               /* quit */
        case Ctrl_C:
        case ESC:
#ifdef FEAT_CON_DIALOG
            if (confirm_msg_used)
            {
                /* Jump to the choices of the dialog. */
                retval = TRUE;
            }
            else
#endif
            {
                got_int = TRUE;
                quit_more = TRUE;
            }
            /* When there is some more output (wrapping line) display that
             * without another prompt. */
            lines_left = Rows - 1;
            break;

#ifdef FEAT_CLIPBOARD
        case Ctrl_Y:
            /* Strange way to allow copying (yanking) a modeless
             * selection at the more prompt.  Use CTRL-Y,
             * because the same is used in Cmdline-mode and at the
             * hit-enter prompt.  However, scrolling one line up
             * might be expected... */
            if (clip_star.state == SELECT_DONE)
                clip_copy_modeless_selection(TRUE);
            continue;
#endif
        default:                /* no valid response */
            msg_moremsg(TRUE);
            continue;
        }

        if (scroll != 0)
        {
            if (scroll < 0)
            {
                /* go to start of last line */
                if (mp_last == NULL)
                    mp = msg_sb_start(last_msgchunk);
                else if (mp_last->sb_prev != NULL)
                    mp = msg_sb_start(mp_last->sb_prev);
                else
                    mp = NULL;

                /* go to start of line at top of the screen */
                for (i = 0; i < Rows - 2 && mp != NULL && mp->sb_prev != NULL;
                                                                          ++i)
                    mp = msg_sb_start(mp->sb_prev);

                if (mp != NULL && mp->sb_prev != NULL)
                {
                    /* Find line to be displayed at top. */
                    for (i = 0; i > scroll; --i)
                    {
                        if (mp == NULL || mp->sb_prev == NULL)
                            break;
                        mp = msg_sb_start(mp->sb_prev);
                        if (mp_last == NULL)
                            mp_last = msg_sb_start(last_msgchunk);
                        else
                            mp_last = msg_sb_start(mp_last->sb_prev);
                    }

                    if (scroll == -1 && screen_ins_lines(0, 0, 1,
                                                       (int)Rows, NULL) == OK)
                    {
                        /* display line at top */
                        (void)disp_sb_line(0, mp);
                    }
                    else
                    {
                        /* redisplay all lines */
                        screenclear();
                        for (i = 0; mp != NULL && i < Rows - 1; ++i)
                        {
                            mp = disp_sb_line(i, mp);
                            ++msg_scrolled;
                        }
                    }
                    scroll = 0;
                }
            }
            else
            {
                /* First display any text that we scrolled back. */
                while (scroll > 0 && mp_last != NULL)
                {
                    /* scroll up, display line at bottom */
                    msg_scroll_up();
                    inc_msg_scrolled();
                    screen_fill((int)Rows - 2, (int)Rows - 1, 0,
                                                   (int)Columns, ' ', ' ', 0);
                    mp_last = disp_sb_line((int)Rows - 2, mp_last);
                    --scroll;
                }
            }

            if (scroll <= 0)
            {
                /* displayed the requested text, more prompt again */
                screen_fill((int)Rows - 1, (int)Rows, 0,
                                                   (int)Columns, ' ', ' ', 0);
                msg_moremsg(FALSE);
                continue;
            }

            /* display more text, return to caller */
            lines_left = scroll;
        }

        break;
    }

    /* clear the --more-- message */
    screen_fill((int)Rows - 1, (int)Rows, 0, (int)Columns, ' ', ' ', 0);
    State = oldState;
#ifdef FEAT_MOUSE
    setmouse();
#endif
    if (quit_more)
    {
        msg_row = Rows - 1;
        msg_col = 0;
    }
#ifdef FEAT_RIGHTLEFT
    else if (cmdmsg_rl)
        msg_col = Columns - 1;
#endif

#ifdef FEAT_CON_DIALOG
    return retval;
#else
    return FALSE;
#endif
}

#if defined(USE_MCH_ERRMSG) || defined(PROTO)

#ifdef mch_errmsg
# undef mch_errmsg
#endif
#ifdef mch_msg
# undef mch_msg
#endif

/*
 * Give an error message.  To be used when the screen hasn't been initialized
 * yet.  When stderr can't be used, collect error messages until the GUI has
 * started and they can be displayed in a message box.
 */
    void
mch_errmsg(str)
    char        *str;
{
    int         len;

#if (defined(UNIX) || defined(FEAT_GUI)) && !defined(ALWAYS_USE_GUI)
    /* On Unix use stderr if it's a tty.
     * When not going to start the GUI also use stderr.
     * On Mac, when started from Finder, stderr is the console. */
    if (
# ifdef UNIX
#  ifdef MACOS_X_UNIX
            (isatty(2) && strcmp("/dev/console", ttyname(2)) != 0)
#  else
            isatty(2)
#  endif
#  ifdef FEAT_GUI
            ||
#  endif
# endif
# ifdef FEAT_GUI
            !(gui.in_use || gui.starting)
# endif
            )
    {
        fprintf(stderr, "%s", str);
        return;
    }
#endif

    /* avoid a delay for a message that isn't there */
    emsg_on_display = FALSE;

    len = (int)STRLEN(str) + 1;
    if (error_ga.ga_growsize == 0)
    {
        error_ga.ga_growsize = 80;
        error_ga.ga_itemsize = 1;
    }
    if (ga_grow(&error_ga, len) == OK)
    {
        mch_memmove((char_u *)error_ga.ga_data + error_ga.ga_len,
                                                          (char_u *)str, len);
#ifdef UNIX
        /* remove CR characters, they are displayed */
        {
            char_u      *p;

            p = (char_u *)error_ga.ga_data + error_ga.ga_len;
            for (;;)
            {
                p = vim_strchr(p, '\r');
                if (p == NULL)
                    break;
                *p = ' ';
            }
        }
#endif
        --len;          /* don't count the NUL at the end */
        error_ga.ga_len += len;
    }
}

/*
 * Give a message.  To be used when the screen hasn't been initialized yet.
 * When there is no tty, collect messages until the GUI has started and they
 * can be displayed in a message box.
 */
    void
mch_msg(str)
    char        *str;
{
#if (defined(UNIX) || defined(FEAT_GUI)) && !defined(ALWAYS_USE_GUI)
    /* On Unix use stdout if we have a tty.  This allows "vim -h | more" and
     * uses mch_errmsg() when started from the desktop.
     * When not going to start the GUI also use stdout.
     * On Mac, when started from Finder, stderr is the console. */
    if (
#  ifdef UNIX
#   ifdef MACOS_X_UNIX
            (isatty(2) && strcmp("/dev/console", ttyname(2)) != 0)
#   else
            isatty(2)
#    endif
#   ifdef FEAT_GUI
            ||
#   endif
#  endif
#  ifdef FEAT_GUI
            !(gui.in_use || gui.starting)
#  endif
            )
    {
        printf("%s", str);
        return;
    }
# endif
    mch_errmsg(str);
}
#endif /* USE_MCH_ERRMSG */

/*
 * Put a character on the screen at the current message position and advance
 * to the next position.  Only for printable ASCII!
 */
    static void
msg_screen_putchar(c, attr)
    int         c;
    int         attr;
{
    msg_didout = TRUE;          /* remember that line is not empty */
    screen_putchar(c, msg_row, msg_col, attr);
#ifdef FEAT_RIGHTLEFT
    if (cmdmsg_rl)
    {
        if (--msg_col == 0)
        {
            msg_col = Columns;
            ++msg_row;
        }
    }
    else
#endif
    {
        if (++msg_col >= Columns)
        {
            msg_col = 0;
            ++msg_row;
        }
    }
}

    void
msg_moremsg(full)
    int     full;
{
    int         attr;
    char_u      *s = (char_u *)_("-- More --");

    attr = hl_attr(HLF_M);
    screen_puts(s, (int)Rows - 1, 0, attr);
    if (full)
        screen_puts((char_u *)
                _(" SPACE/d/j: screen/page/line down, b/u/k: up, q: quit "),
                (int)Rows - 1, vim_strsize(s), attr);
}

/*
 * Repeat the message for the current mode: ASKMORE, EXTERNCMD, CONFIRM or
 * exmode_active.
 */
    void
repeat_message()
{
    if (State == ASKMORE)
    {
        msg_moremsg(TRUE);      /* display --more-- message again */
        msg_row = Rows - 1;
    }
#ifdef FEAT_CON_DIALOG
    else if (State == CONFIRM)
    {
        display_confirm_msg();  /* display ":confirm" message again */
        msg_row = Rows - 1;
    }
#endif
    else if (State == EXTERNCMD)
    {
        windgoto(msg_row, msg_col); /* put cursor back */
    }
    else if (State == HITRETURN || State == SETWSIZE)
    {
        if (msg_row == Rows - 1)
        {
            /* Avoid drawing the "hit-enter" prompt below the previous one,
             * overwrite it.  Esp. useful when regaining focus and a
             * FocusGained autocmd exists but didn't draw anything. */
            msg_didout = FALSE;
            msg_col = 0;
            msg_clr_eos();
        }
        hit_return_msg();
        msg_row = Rows - 1;
    }
}

/*
 * msg_check_screen - check if the screen is initialized.
 * Also check msg_row and msg_col, if they are too big it may cause a crash.
 * While starting the GUI the terminal codes will be set for the GUI, but the
 * output goes to the terminal.  Don't use the terminal codes then.
 */
    static int
msg_check_screen()
{
    if (!full_screen || !screen_valid(FALSE))
        return FALSE;

    if (msg_row >= Rows)
        msg_row = Rows - 1;
    if (msg_col >= Columns)
        msg_col = Columns - 1;
    return TRUE;
}

/*
 * Clear from current message position to end of screen.
 * Skip this when ":silent" was used, no need to clear for redirection.
 */
    void
msg_clr_eos()
{
    if (msg_silent == 0)
        msg_clr_eos_force();
}

/*
 * Clear from current message position to end of screen.
 * Note: msg_col is not updated, so we remember the end of the message
 * for msg_check().
 */
    void
msg_clr_eos_force()
{
    if (msg_use_printf())
    {
        if (full_screen)        /* only when termcap codes are valid */
        {
            if (*T_CD)
                out_str(T_CD);  /* clear to end of display */
            else if (*T_CE)
                out_str(T_CE);  /* clear to end of line */
        }
    }
    else
    {
#ifdef FEAT_RIGHTLEFT
        if (cmdmsg_rl)
        {
            screen_fill(msg_row, msg_row + 1, 0, msg_col + 1, ' ', ' ', 0);
            screen_fill(msg_row + 1, (int)Rows, 0, (int)Columns, ' ', ' ', 0);
        }
        else
#endif
        {
            screen_fill(msg_row, msg_row + 1, msg_col, (int)Columns,
                                                                 ' ', ' ', 0);
            screen_fill(msg_row + 1, (int)Rows, 0, (int)Columns, ' ', ' ', 0);
        }
    }
}

/*
 * Clear the command line.
 */
    void
msg_clr_cmdline()
{
    msg_row = cmdline_row;
    msg_col = 0;
    msg_clr_eos_force();
}

/*
 * end putting a message on the screen
 * call wait_return if the message does not fit in the available space
 * return TRUE if wait_return not called.
 */
    int
msg_end()
{
    /*
     * if the string is larger than the window,
     * or the ruler option is set and we run into it,
     * we have to redraw the window.
     * Do not do this if we are abandoning the file or editing the command line.
     */
    if (!exiting && need_wait_return && !(State & CMDLINE))
    {
        wait_return(FALSE);
        return FALSE;
    }
    out_flush();
    return TRUE;
}

/*
 * If the written message runs into the shown command or ruler, we have to
 * wait for hit-return and redraw the window later.
 */
    void
msg_check()
{
    if (msg_row == Rows - 1 && msg_col >= sc_col)
    {
        need_wait_return = TRUE;
        redraw_cmdline = TRUE;
    }
}

/*
 * May write a string to the redirection file.
 * When "maxlen" is -1 write the whole string, otherwise up to "maxlen" bytes.
 */
    static void
redir_write(str, maxlen)
    char_u      *str;
    int         maxlen;
{
    char_u      *s = str;
    static int  cur_col = 0;

    /* Don't do anything for displaying prompts and the like. */
    if (redir_off)
        return;

    /*
     * If 'verbosefile' is set write message in that file.
     * Must come before the rest because of updating "msg_col".
     */
    if (*p_vfile != NUL)
        verbose_write(s, maxlen);

    if (redirecting())
    {
        /* If the string doesn't start with CR or NL, go to msg_col */
        if (*s != '\n' && *s != '\r')
        {
            while (cur_col < msg_col)
            {
#ifdef FEAT_EVAL
                if (redir_reg)
                    write_reg_contents(redir_reg, (char_u *)" ", -1, TRUE);
                else if (redir_vname)
                    var_redir_str((char_u *)" ", -1);
                else if (redir_fd)
#endif
                    fputs(" ", redir_fd);
                ++cur_col;
            }
        }

#ifdef FEAT_EVAL
        if (redir_reg)
            write_reg_contents(redir_reg, s, maxlen, TRUE);
        if (redir_vname)
            var_redir_str(s, maxlen);
#endif

        /* Adjust the current column */
        while (*s != NUL && (maxlen < 0 || (int)(s - str) < maxlen))
        {
#ifdef FEAT_EVAL
            if (!redir_reg && !redir_vname && redir_fd != NULL)
#endif
                putc(*s, redir_fd);
            if (*s == '\r' || *s == '\n')
                cur_col = 0;
            else if (*s == '\t')
                cur_col += (8 - cur_col % 8);
            else
                ++cur_col;
            ++s;
        }

        if (msg_silent != 0)    /* should update msg_col */
            msg_col = cur_col;
    }
}

    int
redirecting()
{
    return redir_fd != NULL
#ifdef FEAT_EVAL
                          || redir_reg || redir_vname
#endif
                                       ;
}

/*
 * Before giving verbose message.
 * Must always be called paired with verbose_leave()!
 */
    void
verbose_enter()
{
    if (*p_vfile != NUL)
        ++msg_silent;
}

/*
 * After giving verbose message.
 * Must always be called paired with verbose_enter()!
 */
    void
verbose_leave()
{
    if (*p_vfile != NUL)
        if (--msg_silent < 0)
            msg_silent = 0;
}

/*
 * Like verbose_enter() and set msg_scroll when displaying the message.
 */
    void
verbose_enter_scroll()
{
    if (*p_vfile != NUL)
        ++msg_silent;
    else
        /* always scroll up, don't overwrite */
        msg_scroll = TRUE;
}

/*
 * Like verbose_leave() and set cmdline_row when displaying the message.
 */
    void
verbose_leave_scroll()
{
    if (*p_vfile != NUL)
    {
        if (--msg_silent < 0)
            msg_silent = 0;
    }
    else
        cmdline_row = msg_row;
}

static FILE *verbose_fd = NULL;
static int  verbose_did_open = FALSE;

/*
 * Called when 'verbosefile' is set: stop writing to the file.
 */
    void
verbose_stop()
{
    if (verbose_fd != NULL)
    {
        fclose(verbose_fd);
        verbose_fd = NULL;
    }
    verbose_did_open = FALSE;
}

/*
 * Open the file 'verbosefile'.
 * Return FAIL or OK.
 */
    int
verbose_open()
{
    if (verbose_fd == NULL && !verbose_did_open)
    {
        /* Only give the error message once. */
        verbose_did_open = TRUE;

        verbose_fd = mch_fopen((char *)p_vfile, "a");
        if (verbose_fd == NULL)
        {
            EMSG2(_(e_notopen), p_vfile);
            return FAIL;
        }
    }
    return OK;
}

/*
 * Write a string to 'verbosefile'.
 * When "maxlen" is -1 write the whole string, otherwise up to "maxlen" bytes.
 */
    static void
verbose_write(str, maxlen)
    char_u      *str;
    int         maxlen;
{
    char_u      *s = str;
    static int  cur_col = 0;

    /* Open the file when called the first time. */
    if (verbose_fd == NULL)
        verbose_open();

    if (verbose_fd != NULL)
    {
        /* If the string doesn't start with CR or NL, go to msg_col */
        if (*s != '\n' && *s != '\r')
        {
            while (cur_col < msg_col)
            {
                fputs(" ", verbose_fd);
                ++cur_col;
            }
        }

        /* Adjust the current column */
        while (*s != NUL && (maxlen < 0 || (int)(s - str) < maxlen))
        {
            putc(*s, verbose_fd);
            if (*s == '\r' || *s == '\n')
                cur_col = 0;
            else if (*s == '\t')
                cur_col += (8 - cur_col % 8);
            else
                ++cur_col;
            ++s;
        }
    }
}

/*
 * Give a warning message (for searching).
 * Use 'w' highlighting and may repeat the message after redrawing
 */
    void
give_warning(message, hl)
    char_u  *message;
    int     hl;
{
    /* Don't do this for ":silent". */
    if (msg_silent != 0)
        return;

    /* Don't want a hit-enter prompt here. */
    ++no_wait_return;

#ifdef FEAT_EVAL
    set_vim_var_string(VV_WARNINGMSG, message, -1);
#endif
    vim_free(keep_msg);
    keep_msg = NULL;
    if (hl)
        keep_msg_attr = hl_attr(HLF_W);
    else
        keep_msg_attr = 0;
    if (msg_attr(message, keep_msg_attr) && msg_scrolled == 0)
        set_keep_msg(message, keep_msg_attr);
    msg_didout = FALSE;     /* overwrite this message */
    msg_nowait = TRUE;      /* don't wait for this message */
    msg_col = 0;

    --no_wait_return;
}

/*
 * Advance msg cursor to column "col".
 */
    void
msg_advance(col)
    int     col;
{
    if (msg_silent != 0)        /* nothing to advance to */
    {
        msg_col = col;          /* for redirection, may fill it up later */
        return;
    }
    if (col >= Columns)         /* not enough room */
        col = Columns - 1;
#ifdef FEAT_RIGHTLEFT
    if (cmdmsg_rl)
        while (msg_col > Columns - col)
            msg_putchar(' ');
    else
#endif
        while (msg_col < col)
            msg_putchar(' ');
}

#if defined(FEAT_CON_DIALOG) || defined(PROTO)
/*
 * Used for "confirm()" function, and the :confirm command prefix.
 * Versions which haven't got flexible dialogs yet, and console
 * versions, get this generic handler which uses the command line.
 *
 * type  = one of:
 *         VIM_QUESTION, VIM_INFO, VIM_WARNING, VIM_ERROR or VIM_GENERIC
 * title = title string (can be NULL for default)
 * (neither used in console dialogs at the moment)
 *
 * Format of the "buttons" string:
 * "Button1Name\nButton2Name\nButton3Name"
 * The first button should normally be the default/accept
 * The second button should be the 'Cancel' button
 * Other buttons- use your imagination!
 * A '&' in a button name becomes a shortcut, so each '&' should be before a
 * different letter.
 */
    int
do_dialog(type, title, message, buttons, dfltbutton, textfield)
    int         type UNUSED;
    char_u      *title UNUSED;
    char_u      *message;
    char_u      *buttons;
    int         dfltbutton;
    char_u      *textfield UNUSED;      /* IObuff for inputdialog(), NULL
                                           otherwise */
{
    int         oldState;
    int         retval = 0;
    char_u      *hotkeys;
    int         c;
    int         i;

#ifndef NO_CONSOLE
    /* Don't output anything in silent mode ("ex -s") */
    if (silent_mode)
        return dfltbutton;   /* return default option */
#endif

#ifdef FEAT_GUI_DIALOG
    /* When GUI is running and 'c' not in 'guioptions', use the GUI dialog */
    if (gui.in_use && vim_strchr(p_go, GO_CONDIALOG) == NULL)
    {
        c = gui_mch_dialog(type, title, message, buttons, dfltbutton,
                                                                   textfield);
        /* avoid a hit-enter prompt without clearing the cmdline */
        need_wait_return = FALSE;
        emsg_on_display = FALSE;
        cmdline_row = msg_row;

        /* Flush output to avoid that further messages and redrawing is done
         * in the wrong order. */
        out_flush();
        gui_mch_update();

        return c;
    }
#endif

    oldState = State;
    State = CONFIRM;
#ifdef FEAT_MOUSE
    setmouse();
#endif

    /*
     * Since we wait for a keypress, don't make the
     * user press RETURN as well afterwards.
     */
    ++no_wait_return;
    hotkeys = msg_show_console_dialog(message, buttons, dfltbutton);

    if (hotkeys != NULL)
    {
        for (;;)
        {
            /* Get a typed character directly from the user. */
            c = get_keystroke();
            switch (c)
            {
            case CAR:           /* User accepts default option */
            case NL:
                retval = dfltbutton;
                break;
            case Ctrl_C:        /* User aborts/cancels */
            case ESC:
                retval = 0;
                break;
            default:            /* Could be a hotkey? */
                if (c < 0)      /* special keys are ignored here */
                    continue;
                /* Make the character lowercase, as chars in "hotkeys" are. */
                c = MB_TOLOWER(c);
                retval = 1;
                for (i = 0; hotkeys[i]; ++i)
                {
#ifdef FEAT_MBYTE
                    if (has_mbyte)
                    {
                        if ((*mb_ptr2char)(hotkeys + i) == c)
                            break;
                        i += (*mb_ptr2len)(hotkeys + i) - 1;
                    }
                    else
#endif
                        if (hotkeys[i] == c)
                            break;
                    ++retval;
                }
                if (hotkeys[i])
                    break;
                /* No hotkey match, so keep waiting */
                continue;
            }
            break;
        }

        vim_free(hotkeys);
    }

    State = oldState;
#ifdef FEAT_MOUSE
    setmouse();
#endif
    --no_wait_return;
    msg_end_prompt();

    return retval;
}

static int copy_char __ARGS((char_u *from, char_u *to, int lowercase));

/*
 * Copy one character from "*from" to "*to", taking care of multi-byte
 * characters.  Return the length of the character in bytes.
 */
    static int
copy_char(from, to, lowercase)
    char_u      *from;
    char_u      *to;
    int         lowercase;      /* make character lower case */
{
#ifdef FEAT_MBYTE
    int         len;
    int         c;

    if (has_mbyte)
    {
        if (lowercase)
        {
            c = MB_TOLOWER((*mb_ptr2char)(from));
            return (*mb_char2bytes)(c, to);
        }
        else
        {
            len = (*mb_ptr2len)(from);
            mch_memmove(to, from, (size_t)len);
            return len;
        }
    }
    else
#endif
    {
        if (lowercase)
            *to = (char_u)TOLOWER_LOC(*from);
        else
            *to = *from;
        return 1;
    }
}

/*
 * Format the dialog string, and display it at the bottom of
 * the screen. Return a string of hotkey chars (if defined) for
 * each 'button'. If a button has no hotkey defined, the first character of
 * the button is used.
 * The hotkeys can be multi-byte characters, but without combining chars.
 *
 * Returns an allocated string with hotkeys, or NULL for error.
 */
    static char_u *
msg_show_console_dialog(message, buttons, dfltbutton)
    char_u      *message;
    char_u      *buttons;
    int         dfltbutton;
{
    int         len = 0;
#ifdef FEAT_MBYTE
# define HOTK_LEN (has_mbyte ? MB_MAXBYTES : 1)
#else
# define HOTK_LEN 1
#endif
    int         lenhotkey = HOTK_LEN;   /* count first button */
    char_u      *hotk = NULL;
    char_u      *msgp = NULL;
    char_u      *hotkp = NULL;
    char_u      *r;
    int         copy;
#define HAS_HOTKEY_LEN 30
    char_u      has_hotkey[HAS_HOTKEY_LEN];
    int         first_hotkey = FALSE;   /* first char of button is hotkey */
    int         idx;

    has_hotkey[0] = FALSE;

    /*
     * First loop: compute the size of memory to allocate.
     * Second loop: copy to the allocated memory.
     */
    for (copy = 0; copy <= 1; ++copy)
    {
        r = buttons;
        idx = 0;
        while (*r)
        {
            if (*r == DLG_BUTTON_SEP)
            {
                if (copy)
                {
                    *msgp++ = ',';
                    *msgp++ = ' ';          /* '\n' -> ', ' */

                    /* advance to next hotkey and set default hotkey */
#ifdef FEAT_MBYTE
                    if (has_mbyte)
                        hotkp += STRLEN(hotkp);
                    else
#endif
                        ++hotkp;
                    hotkp[copy_char(r + 1, hotkp, TRUE)] = NUL;
                    if (dfltbutton)
                        --dfltbutton;

                    /* If no hotkey is specified first char is used. */
                    if (idx < HAS_HOTKEY_LEN - 1 && !has_hotkey[++idx])
                        first_hotkey = TRUE;
                }
                else
                {
                    len += 3;               /* '\n' -> ', '; 'x' -> '(x)' */
                    lenhotkey += HOTK_LEN;  /* each button needs a hotkey */
                    if (idx < HAS_HOTKEY_LEN - 1)
                        has_hotkey[++idx] = FALSE;
                }
            }
            else if (*r == DLG_HOTKEY_CHAR || first_hotkey)
            {
                if (*r == DLG_HOTKEY_CHAR)
                    ++r;
                first_hotkey = FALSE;
                if (copy)
                {
                    if (*r == DLG_HOTKEY_CHAR)          /* '&&a' -> '&a' */
                        *msgp++ = *r;
                    else
                    {
                        /* '&a' -> '[a]' */
                        *msgp++ = (dfltbutton == 1) ? '[' : '(';
                        msgp += copy_char(r, msgp, FALSE);
                        *msgp++ = (dfltbutton == 1) ? ']' : ')';

                        /* redefine hotkey */
                        hotkp[copy_char(r, hotkp, TRUE)] = NUL;
                    }
                }
                else
                {
                    ++len;          /* '&a' -> '[a]' */
                    if (idx < HAS_HOTKEY_LEN - 1)
                        has_hotkey[idx] = TRUE;
                }
            }
            else
            {
                /* everything else copy literally */
                if (copy)
                    msgp += copy_char(r, msgp, FALSE);
            }

            /* advance to the next character */
            mb_ptr_adv(r);
        }

        if (copy)
        {
            *msgp++ = ':';
            *msgp++ = ' ';
            *msgp = NUL;
        }
        else
        {
            len += (int)(STRLEN(message)
                        + 2                     /* for the NL's */
                        + STRLEN(buttons)
                        + 3);                   /* for the ": " and NUL */
            lenhotkey++;                        /* for the NUL */

            /* If no hotkey is specified first char is used. */
            if (!has_hotkey[0])
            {
                first_hotkey = TRUE;
                len += 2;               /* "x" -> "[x]" */
            }

            /*
             * Now allocate and load the strings
             */
            vim_free(confirm_msg);
            confirm_msg = alloc(len);
            if (confirm_msg == NULL)
                return NULL;
            *confirm_msg = NUL;
            hotk = alloc(lenhotkey);
            if (hotk == NULL)
                return NULL;

            *confirm_msg = '\n';
            STRCPY(confirm_msg + 1, message);

            msgp = confirm_msg + 1 + STRLEN(message);
            hotkp = hotk;

            /* Define first default hotkey.  Keep the hotkey string NUL
             * terminated to avoid reading past the end. */
            hotkp[copy_char(buttons, hotkp, TRUE)] = NUL;

            /* Remember where the choices start, displaying starts here when
             * "hotkp" typed at the more prompt. */
            confirm_msg_tail = msgp;
            *msgp++ = '\n';
        }
    }

    display_confirm_msg();
    return hotk;
}

/*
 * Display the ":confirm" message.  Also called when screen resized.
 */
    void
display_confirm_msg()
{
    /* avoid that 'q' at the more prompt truncates the message here */
    ++confirm_msg_used;
    if (confirm_msg != NULL)
        msg_puts_attr(confirm_msg, hl_attr(HLF_M));
    --confirm_msg_used;
}

#endif /* FEAT_CON_DIALOG */

#if defined(FEAT_CON_DIALOG) || defined(FEAT_GUI_DIALOG)

    int
vim_dialog_yesno(type, title, message, dflt)
    int         type;
    char_u      *title;
    char_u      *message;
    int         dflt;
{
    if (do_dialog(type,
                title == NULL ? (char_u *)_("Question") : title,
                message,
                (char_u *)_("&Yes\n&No"), dflt, NULL) == 1)
        return VIM_YES;
    return VIM_NO;
}

    int
vim_dialog_yesnocancel(type, title, message, dflt)
    int         type;
    char_u      *title;
    char_u      *message;
    int         dflt;
{
    switch (do_dialog(type,
                title == NULL ? (char_u *)_("Question") : title,
                message,
                (char_u *)_("&Yes\n&No\n&Cancel"), dflt, NULL))
    {
        case 1: return VIM_YES;
        case 2: return VIM_NO;
    }
    return VIM_CANCEL;
}

    int
vim_dialog_yesnoallcancel(type, title, message, dflt)
    int         type;
    char_u      *title;
    char_u      *message;
    int         dflt;
{
    switch (do_dialog(type,
                title == NULL ? (char_u *)"Question" : title,
                message,
                (char_u *)_("&Yes\n&No\nSave &All\n&Discard All\n&Cancel"),
                                                                  dflt, NULL))
    {
        case 1: return VIM_YES;
        case 2: return VIM_NO;
        case 3: return VIM_ALL;
        case 4: return VIM_DISCARDALL;
    }
    return VIM_CANCEL;
}

#endif /* FEAT_GUI_DIALOG || FEAT_CON_DIALOG */

#if defined(FEAT_BROWSE) || defined(PROTO)
/*
 * Generic browse function.  Calls gui_mch_browse() when possible.
 * Later this may pop-up a non-GUI file selector (external command?).
 */
    char_u *
do_browse(flags, title, dflt, ext, initdir, filter, buf)
    int         flags;          /* BROWSE_SAVE and BROWSE_DIR */
    char_u      *title;         /* title for the window */
    char_u      *dflt;          /* default file name (may include directory) */
    char_u      *ext;           /* extension added */
    char_u      *initdir;       /* initial directory, NULL for current dir or
                                   when using path from "dflt" */
    char_u      *filter;        /* file name filter */
    buf_T       *buf;           /* buffer to read/write for */
{
    char_u              *fname;
    static char_u       *last_dir = NULL;    /* last used directory */
    char_u              *tofree = NULL;
    int                 save_browse = cmdmod.browse;

    /* Must turn off browse to avoid that autocommands will get the
     * flag too!  */
    cmdmod.browse = FALSE;

    if (title == NULL || *title == NUL)
    {
        if (flags & BROWSE_DIR)
            title = (char_u *)_("Select Directory dialog");
        else if (flags & BROWSE_SAVE)
            title = (char_u *)_("Save File dialog");
        else
            title = (char_u *)_("Open File dialog");
    }

    /* When no directory specified, use default file name, default dir, buffer
     * dir, last dir or current dir */
    if ((initdir == NULL || *initdir == NUL) && dflt != NULL && *dflt != NUL)
    {
        if (mch_isdir(dflt))            /* default file name is a directory */
        {
            initdir = dflt;
            dflt = NULL;
        }
        else if (gettail(dflt) != dflt) /* default file name includes a path */
        {
            tofree = vim_strsave(dflt);
            if (tofree != NULL)
            {
                initdir = tofree;
                *gettail(initdir) = NUL;
                dflt = gettail(dflt);
            }
        }
    }

    if (initdir == NULL || *initdir == NUL)
    {
        /* When 'browsedir' is a directory, use it */
        if (STRCMP(p_bsdir, "last") != 0
                && STRCMP(p_bsdir, "buffer") != 0
                && STRCMP(p_bsdir, "current") != 0
                && mch_isdir(p_bsdir))
            initdir = p_bsdir;
        /* When saving or 'browsedir' is "buffer", use buffer fname */
        else if (((flags & BROWSE_SAVE) || *p_bsdir == 'b')
                && buf != NULL && buf->b_ffname != NULL)
        {
            if (dflt == NULL || *dflt == NUL)
                dflt = gettail(curbuf->b_ffname);
            tofree = vim_strsave(curbuf->b_ffname);
            if (tofree != NULL)
            {
                initdir = tofree;
                *gettail(initdir) = NUL;
            }
        }
        /* When 'browsedir' is "last", use dir from last browse */
        else if (*p_bsdir == 'l')
            initdir = last_dir;
        /* When 'browsedir is "current", use current directory.  This is the
         * default already, leave initdir empty. */
    }

# ifdef FEAT_GUI
    if (gui.in_use)             /* when this changes, also adjust f_has()! */
    {
        if (filter == NULL
#  ifdef FEAT_EVAL
                && (filter = get_var_value((char_u *)"b:browsefilter")) == NULL
                && (filter = get_var_value((char_u *)"g:browsefilter")) == NULL
#  endif
        )
            filter = BROWSE_FILTER_DEFAULT;
        if (flags & BROWSE_DIR)
        {
#  if defined(HAVE_GTK2) || defined(WIN3264)
            /* For systems that have a directory dialog. */
            fname = gui_mch_browsedir(title, initdir);
#  else
            /* Generic solution for selecting a directory: select a file and
             * remove the file name. */
            fname = gui_mch_browse(0, title, dflt, ext, initdir, (char_u *)"");
#  endif
#  if !defined(HAVE_GTK2)
            /* Win32 adds a dummy file name, others return an arbitrary file
             * name.  GTK+ 2 returns only the directory, */
            if (fname != NULL && *fname != NUL && !mch_isdir(fname))
            {
                /* Remove the file name. */
                char_u      *tail = gettail_sep(fname);

                if (tail == fname)
                    *tail++ = '.';      /* use current dir */
                *tail = NUL;
            }
#  endif
        }
        else
            fname = gui_mch_browse(flags & BROWSE_SAVE,
                                           title, dflt, ext, initdir, filter);

        /* We hang around in the dialog for a while, the user might do some
         * things to our files.  The Win32 dialog allows deleting or renaming
         * a file, check timestamps. */
        need_check_timestamps = TRUE;
        did_check_timestamps = FALSE;
    }
    else
# endif
    {
        /* TODO: non-GUI file selector here */
        EMSG(_("E338: Sorry, no file browser in console mode"));
        fname = NULL;
    }

    /* keep the directory for next time */
    if (fname != NULL)
    {
        vim_free(last_dir);
        last_dir = vim_strsave(fname);
        if (last_dir != NULL && !(flags & BROWSE_DIR))
        {
            *gettail(last_dir) = NUL;
            if (*last_dir == NUL)
            {
                /* filename only returned, must be in current dir */
                vim_free(last_dir);
                last_dir = alloc(MAXPATHL);
                if (last_dir != NULL)
                    mch_dirname(last_dir, MAXPATHL);
            }
        }
    }

    vim_free(tofree);
    cmdmod.browse = save_browse;

    return fname;
}
#endif

#if defined(HAVE_STDARG_H) && defined(FEAT_EVAL)
static char *e_printf = N_("E766: Insufficient arguments for printf()");

static long tv_nr __ARGS((typval_T *tvs, int *idxp));
static char *tv_str __ARGS((typval_T *tvs, int *idxp));
# ifdef FEAT_FLOAT
static double tv_float __ARGS((typval_T *tvs, int *idxp));
# endif

/*
 * Get number argument from "idxp" entry in "tvs".  First entry is 1.
 */
    static long
tv_nr(tvs, idxp)
    typval_T    *tvs;
    int         *idxp;
{
    int         idx = *idxp - 1;
    long        n = 0;
    int         err = FALSE;

    if (tvs[idx].v_type == VAR_UNKNOWN)
        EMSG(_(e_printf));
    else
    {
        ++*idxp;
        n = get_tv_number_chk(&tvs[idx], &err);
        if (err)
            n = 0;
    }
    return n;
}

/*
 * Get string argument from "idxp" entry in "tvs".  First entry is 1.
 * Returns NULL for an error.
 */
    static char *
tv_str(tvs, idxp)
    typval_T    *tvs;
    int         *idxp;
{
    int         idx = *idxp - 1;
    char        *s = NULL;

    if (tvs[idx].v_type == VAR_UNKNOWN)
        EMSG(_(e_printf));
    else
    {
        ++*idxp;
        s = (char *)get_tv_string_chk(&tvs[idx]);
    }
    return s;
}

# ifdef FEAT_FLOAT
/*
 * Get float argument from "idxp" entry in "tvs".  First entry is 1.
 */
    static double
tv_float(tvs, idxp)
    typval_T    *tvs;
    int         *idxp;
{
    int         idx = *idxp - 1;
    double      f = 0;

    if (tvs[idx].v_type == VAR_UNKNOWN)
        EMSG(_(e_printf));
    else
    {
        ++*idxp;
        if (tvs[idx].v_type == VAR_FLOAT)
            f = tvs[idx].vval.v_float;
        else if (tvs[idx].v_type == VAR_NUMBER)
            f = tvs[idx].vval.v_number;
        else
            EMSG(_("E807: Expected Float argument for printf()"));
    }
    return f;
}
# endif
#endif

/*
 * This code was included to provide a portable vsnprintf() and snprintf().
 * Some systems may provide their own, but we always use this one for
 * consistency.
 *
 * This code is based on snprintf.c - a portable implementation of snprintf
 * by Mark Martinec <mark.martinec@ijs.si>, Version 2.2, 2000-10-06.
 * Included with permission.  It was heavily modified to fit in Vim.
 * The original code, including useful comments, can be found here:
 *      http://www.ijs.si/software/snprintf/
 *
 * This snprintf() only supports the following conversion specifiers:
 * s, c, d, u, o, x, X, p  (and synonyms: i, D, U, O - see below)
 * with flags: '-', '+', ' ', '0' and '#'.
 * An asterisk is supported for field width as well as precision.
 *
 * Limited support for floating point was added: 'f', 'e', 'E', 'g', 'G'.
 *
 * Length modifiers 'h' (short int) and 'l' (long int) are supported.
 * 'll' (long long int) is not supported.
 *
 * The locale is not used, the string is used as a byte string.  This is only
 * relevant for double-byte encodings where the second byte may be '%'.
 *
 * It is permitted for "str_m" to be zero, and it is permitted to specify NULL
 * pointer for resulting string argument if "str_m" is zero (as per ISO C99).
 *
 * The return value is the number of characters which would be generated
 * for the given input, excluding the trailing null. If this value
 * is greater or equal to "str_m", not all characters from the result
 * have been stored in str, output bytes beyond the ("str_m"-1) -th character
 * are discarded. If "str_m" is greater than zero it is guaranteed
 * the resulting string will be null-terminated.
 */

/*
 * When va_list is not supported we only define vim_snprintf().
 *
 * vim_vsnprintf() can be invoked with either "va_list" or a list of
 * "typval_T".  When the latter is not used it must be NULL.
 */

/* When generating prototypes all of this is skipped, cproto doesn't
 * understand this. */
#ifndef PROTO
# ifdef HAVE_STDARG_H
    int
vim_snprintf(char *str, size_t str_m, char *fmt, ...)
{
    va_list     ap;
    int         str_l;

    va_start(ap, fmt);
    str_l = vim_vsnprintf(str, str_m, fmt, ap, NULL);
    va_end(ap);
    return str_l;
}

    int
vim_vsnprintf(str, str_m, fmt, ap, tvs)
# else
    /* clumsy way to work around missing va_list */
#  define get_a_arg(i) (++i, i == 2 ? a1 : i == 3 ? a2 : i == 4 ? a3 : i == 5 ? a4 : i == 6 ? a5 : i == 7 ? a6 : i == 8 ? a7 : i == 9 ? a8 : i == 10 ? a9 : a10)

/* VARARGS */
    int
#ifdef __BORLANDC__
_RTLENTRYF
#endif
vim_snprintf(str, str_m, fmt, a1, a2, a3, a4, a5, a6, a7, a8, a9, a10)
# endif
    char        *str;
    size_t      str_m;
    char        *fmt;
# ifdef HAVE_STDARG_H
    va_list     ap;
    typval_T    *tvs;
# else
    long        a1, a2, a3, a4, a5, a6, a7, a8, a9, a10;
# endif
{
    size_t      str_l = 0;
    char        *p = fmt;
    int         arg_idx = 1;

    if (p == NULL)
        p = "";
    while (*p != NUL)
    {
        if (*p != '%')
        {
            char    *q = strchr(p + 1, '%');
            size_t  n = (q == NULL) ? STRLEN(p) : (size_t)(q - p);

            /* Copy up to the next '%' or NUL without any changes. */
            if (str_l < str_m)
            {
                size_t avail = str_m - str_l;

                mch_memmove(str + str_l, p, n > avail ? avail : n);
            }
            p += n;
            str_l += n;
        }
        else
        {
            size_t  min_field_width = 0, precision = 0;
            int     zero_padding = 0, precision_specified = 0, justify_left = 0;
            int     alternate_form = 0, force_sign = 0;

            /* If both the ' ' and '+' flags appear, the ' ' flag should be
             * ignored. */
            int     space_for_positive = 1;

            /* allowed values: \0, h, l, L */
            char    length_modifier = '\0';

            /* temporary buffer for simple numeric->string conversion */
#ifdef FEAT_FLOAT
# define TMP_LEN 350    /* On my system 1e308 is the biggest number possible.
                         * That sounds reasonable to use as the maximum
                         * printable. */
#else
# define TMP_LEN 32
#endif
            char    tmp[TMP_LEN];

            /* string address in case of string argument */
            char    *str_arg;

            /* natural field width of arg without padding and sign */
            size_t  str_arg_l;

            /* unsigned char argument value - only defined for c conversion.
             * N.B. standard explicitly states the char argument for the c
             * conversion is unsigned */
            unsigned char uchar_arg;

            /* number of zeros to be inserted for numeric conversions as
             * required by the precision or minimal field width */
            size_t  number_of_zeros_to_pad = 0;

            /* index into tmp where zero padding is to be inserted */
            size_t  zero_padding_insertion_ind = 0;

            /* current conversion specifier character */
            char    fmt_spec = '\0';

            str_arg = NULL;
            p++;  /* skip '%' */

            /* parse flags */
            while (*p == '0' || *p == '-' || *p == '+' || *p == ' '
                                                   || *p == '#' || *p == '\'')
            {
                switch (*p)
                {
                    case '0': zero_padding = 1; break;
                    case '-': justify_left = 1; break;
                    case '+': force_sign = 1; space_for_positive = 0; break;
                    case ' ': force_sign = 1;
                              /* If both the ' ' and '+' flags appear, the ' '
                               * flag should be ignored */
                              break;
                    case '#': alternate_form = 1; break;
                    case '\'': break;
                }
                p++;
            }
            /* If the '0' and '-' flags both appear, the '0' flag should be
             * ignored. */

            /* parse field width */
            if (*p == '*')
            {
                int j;

                p++;
                j =
#ifndef HAVE_STDARG_H
                    get_a_arg(arg_idx);
#else
# if defined(FEAT_EVAL)
                    tvs != NULL ? tv_nr(tvs, &arg_idx) :
# endif
                        va_arg(ap, int);
#endif
                if (j >= 0)
                    min_field_width = j;
                else
                {
                    min_field_width = -j;
                    justify_left = 1;
                }
            }
            else if (VIM_ISDIGIT((int)(*p)))
            {
                /* size_t could be wider than unsigned int; make sure we treat
                 * argument like common implementations do */
                unsigned int uj = *p++ - '0';

                while (VIM_ISDIGIT((int)(*p)))
                    uj = 10 * uj + (unsigned int)(*p++ - '0');
                min_field_width = uj;
            }

            /* parse precision */
            if (*p == '.')
            {
                p++;
                precision_specified = 1;
                if (*p == '*')
                {
                    int j;

                    j =
#ifndef HAVE_STDARG_H
                        get_a_arg(arg_idx);
#else
# if defined(FEAT_EVAL)
                        tvs != NULL ? tv_nr(tvs, &arg_idx) :
# endif
                            va_arg(ap, int);
#endif
                    p++;
                    if (j >= 0)
                        precision = j;
                    else
                    {
                        precision_specified = 0;
                        precision = 0;
                    }
                }
                else if (VIM_ISDIGIT((int)(*p)))
                {
                    /* size_t could be wider than unsigned int; make sure we
                     * treat argument like common implementations do */
                    unsigned int uj = *p++ - '0';

                    while (VIM_ISDIGIT((int)(*p)))
                        uj = 10 * uj + (unsigned int)(*p++ - '0');
                    precision = uj;
                }
            }

            /* parse 'h', 'l' and 'll' length modifiers */
            if (*p == 'h' || *p == 'l')
            {
                length_modifier = *p;
                p++;
                if (length_modifier == 'l' && *p == 'l')
                {
                    /* double l = long long */
                    length_modifier = 'l';      /* treat it as a single 'l' */
                    p++;
                }
            }
            fmt_spec = *p;

            /* common synonyms: */
            switch (fmt_spec)
            {
                case 'i': fmt_spec = 'd'; break;
                case 'D': fmt_spec = 'd'; length_modifier = 'l'; break;
                case 'U': fmt_spec = 'u'; length_modifier = 'l'; break;
                case 'O': fmt_spec = 'o'; length_modifier = 'l'; break;
                case 'F': fmt_spec = 'f'; break;
                default: break;
            }

            /* get parameter value, do initial processing */
            switch (fmt_spec)
            {
                /* '%' and 'c' behave similar to 's' regarding flags and field
                 * widths */
            case '%':
            case 'c':
            case 's':
                length_modifier = '\0';
                str_arg_l = 1;
                switch (fmt_spec)
                {
                case '%':
                    str_arg = p;
                    break;

                case 'c':
                    {
                        int j;

                        j =
#ifndef HAVE_STDARG_H
                            get_a_arg(arg_idx);
#else
# if defined(FEAT_EVAL)
                            tvs != NULL ? tv_nr(tvs, &arg_idx) :
# endif
                                va_arg(ap, int);
#endif
                        /* standard demands unsigned char */
                        uchar_arg = (unsigned char)j;
                        str_arg = (char *)&uchar_arg;
                        break;
                    }

                case 's':
                    str_arg =
#ifndef HAVE_STDARG_H
                                (char *)get_a_arg(arg_idx);
#else
# if defined(FEAT_EVAL)
                                tvs != NULL ? tv_str(tvs, &arg_idx) :
# endif
                                    va_arg(ap, char *);
#endif
                    if (str_arg == NULL)
                    {
                        str_arg = "[NULL]";
                        str_arg_l = 6;
                    }
                    /* make sure not to address string beyond the specified
                     * precision !!! */
                    else if (!precision_specified)
                        str_arg_l = strlen(str_arg);
                    /* truncate string if necessary as requested by precision */
                    else if (precision == 0)
                        str_arg_l = 0;
                    else
                    {
                        /* Don't put the #if inside memchr(), it can be a
                         * macro. */
#if SIZEOF_INT <= 2
                        char *q = memchr(str_arg, '\0', precision);
#else
                        /* memchr on HP does not like n > 2^31  !!! */
                        char *q = memchr(str_arg, '\0',
                                  precision <= (size_t)0x7fffffffL ? precision
                                                       : (size_t)0x7fffffffL);
#endif
                        str_arg_l = (q == NULL) ? precision
                                                      : (size_t)(q - str_arg);
                    }
                    break;

                default:
                    break;
                }
                break;

            case 'd': case 'u': case 'o': case 'x': case 'X': case 'p':
                {
                    /* NOTE: the u, o, x, X and p conversion specifiers
                     * imply the value is unsigned;  d implies a signed
                     * value */

                    /* 0 if numeric argument is zero (or if pointer is
                     * NULL for 'p'), +1 if greater than zero (or nonzero
                     * for unsigned arguments), -1 if negative (unsigned
                     * argument is never negative) */
                    int arg_sign = 0;

                    /* only defined for length modifier h, or for no
                     * length modifiers */
                    int int_arg = 0;
                    unsigned int uint_arg = 0;

                    /* only defined for length modifier l */
                    long int long_arg = 0;
                    unsigned long int ulong_arg = 0;

                    /* pointer argument value -only defined for p
                     * conversion */
                    void *ptr_arg = NULL;

                    if (fmt_spec == 'p')
                    {
                        length_modifier = '\0';
                        ptr_arg =
#ifndef HAVE_STDARG_H
                                 (void *)get_a_arg(arg_idx);
#else
# if defined(FEAT_EVAL)
                                 tvs != NULL ? (void *)tv_str(tvs, &arg_idx) :
# endif
                                        va_arg(ap, void *);
#endif
                        if (ptr_arg != NULL)
                            arg_sign = 1;
                    }
                    else if (fmt_spec == 'd')
                    {
                        /* signed */
                        switch (length_modifier)
                        {
                        case '\0':
                        case 'h':
                            /* char and short arguments are passed as int. */
                            int_arg =
#ifndef HAVE_STDARG_H
                                        get_a_arg(arg_idx);
#else
# if defined(FEAT_EVAL)
                                        tvs != NULL ? tv_nr(tvs, &arg_idx) :
# endif
                                            va_arg(ap, int);
#endif
                            if (int_arg > 0)
                                arg_sign =  1;
                            else if (int_arg < 0)
                                arg_sign = -1;
                            break;
                        case 'l':
                            long_arg =
#ifndef HAVE_STDARG_H
                                        get_a_arg(arg_idx);
#else
# if defined(FEAT_EVAL)
                                        tvs != NULL ? tv_nr(tvs, &arg_idx) :
# endif
                                            va_arg(ap, long int);
#endif
                            if (long_arg > 0)
                                arg_sign =  1;
                            else if (long_arg < 0)
                                arg_sign = -1;
                            break;
                        }
                    }
                    else
                    {
                        /* unsigned */
                        switch (length_modifier)
                        {
                            case '\0':
                            case 'h':
                                uint_arg =
#ifndef HAVE_STDARG_H
                                            get_a_arg(arg_idx);
#else
# if defined(FEAT_EVAL)
                                            tvs != NULL ? (unsigned)
                                                        tv_nr(tvs, &arg_idx) :
# endif
                                                va_arg(ap, unsigned int);
#endif
                                if (uint_arg != 0)
                                    arg_sign = 1;
                                break;
                            case 'l':
                                ulong_arg =
#ifndef HAVE_STDARG_H
                                            get_a_arg(arg_idx);
#else
# if defined(FEAT_EVAL)
                                            tvs != NULL ? (unsigned long)
                                                        tv_nr(tvs, &arg_idx) :
# endif
                                                va_arg(ap, unsigned long int);
#endif
                                if (ulong_arg != 0)
                                    arg_sign = 1;
                                break;
                        }
                    }

                    str_arg = tmp;
                    str_arg_l = 0;

                    /* NOTE:
                     *   For d, i, u, o, x, and X conversions, if precision is
                     *   specified, the '0' flag should be ignored. This is so
                     *   with Solaris 2.6, Digital UNIX 4.0, HPUX 10, Linux,
                     *   FreeBSD, NetBSD; but not with Perl.
                     */
                    if (precision_specified)
                        zero_padding = 0;
                    if (fmt_spec == 'd')
                    {
                        if (force_sign && arg_sign >= 0)
                            tmp[str_arg_l++] = space_for_positive ? ' ' : '+';
                        /* leave negative numbers for sprintf to handle, to
                         * avoid handling tricky cases like (short int)-32768 */
                    }
                    else if (alternate_form)
                    {
                        if (arg_sign != 0
                                     && (fmt_spec == 'x' || fmt_spec == 'X') )
                        {
                            tmp[str_arg_l++] = '0';
                            tmp[str_arg_l++] = fmt_spec;
                        }
                        /* alternate form should have no effect for p
                         * conversion, but ... */
                    }

                    zero_padding_insertion_ind = str_arg_l;
                    if (!precision_specified)
                        precision = 1;   /* default precision is 1 */
                    if (precision == 0 && arg_sign == 0)
                    {
                        /* When zero value is formatted with an explicit
                         * precision 0, the resulting formatted string is
                         * empty (d, i, u, o, x, X, p).   */
                    }
                    else
                    {
                        char    f[5];
                        int     f_l = 0;

                        /* construct a simple format string for sprintf */
                        f[f_l++] = '%';
                        if (!length_modifier)
                            ;
                        else if (length_modifier == '2')
                        {
                            f[f_l++] = 'l';
                            f[f_l++] = 'l';
                        }
                        else
                            f[f_l++] = length_modifier;
                        f[f_l++] = fmt_spec;
                        f[f_l++] = '\0';

                        if (fmt_spec == 'p')
                            str_arg_l += sprintf(tmp + str_arg_l, f, ptr_arg);
                        else if (fmt_spec == 'd')
                        {
                            /* signed */
                            switch (length_modifier)
                            {
                            case '\0':
                            case 'h': str_arg_l += sprintf(
                                                 tmp + str_arg_l, f, int_arg);
                                      break;
                            case 'l': str_arg_l += sprintf(
                                                tmp + str_arg_l, f, long_arg);
                                      break;
                            }
                        }
                        else
                        {
                            /* unsigned */
                            switch (length_modifier)
                            {
                            case '\0':
                            case 'h': str_arg_l += sprintf(
                                                tmp + str_arg_l, f, uint_arg);
                                      break;
                            case 'l': str_arg_l += sprintf(
                                               tmp + str_arg_l, f, ulong_arg);
                                      break;
                            }
                        }

                        /* include the optional minus sign and possible
                         * "0x" in the region before the zero padding
                         * insertion point */
                        if (zero_padding_insertion_ind < str_arg_l
                                && tmp[zero_padding_insertion_ind] == '-')
                            zero_padding_insertion_ind++;
                        if (zero_padding_insertion_ind + 1 < str_arg_l
                                && tmp[zero_padding_insertion_ind]   == '0'
                                && (tmp[zero_padding_insertion_ind + 1] == 'x'
                                 || tmp[zero_padding_insertion_ind + 1] == 'X'))
                            zero_padding_insertion_ind += 2;
                    }

                    {
                        size_t num_of_digits = str_arg_l
                                                 - zero_padding_insertion_ind;

                        if (alternate_form && fmt_spec == 'o'
                                /* unless zero is already the first
                                 * character */
                                && !(zero_padding_insertion_ind < str_arg_l
                                    && tmp[zero_padding_insertion_ind] == '0'))
                        {
                            /* assure leading zero for alternate-form
                             * octal numbers */
                            if (!precision_specified
                                             || precision < num_of_digits + 1)
                            {
                                /* precision is increased to force the
                                 * first character to be zero, except if a
                                 * zero value is formatted with an
                                 * explicit precision of zero */
                                precision = num_of_digits + 1;
                                precision_specified = 1;
                            }
                        }
                        /* zero padding to specified precision? */
                        if (num_of_digits < precision)
                            number_of_zeros_to_pad = precision - num_of_digits;
                    }
                    /* zero padding to specified minimal field width? */
                    if (!justify_left && zero_padding)
                    {
                        int n = (int)(min_field_width - (str_arg_l
                                                    + number_of_zeros_to_pad));
                        if (n > 0)
                            number_of_zeros_to_pad += n;
                    }
                    break;
                }

#ifdef FEAT_FLOAT
            case 'f':
            case 'e':
            case 'E':
            case 'g':
            case 'G':
                {
                    /* Floating point. */
                    double      f;
                    double      abs_f;
                    char        format[40];
                    int         l;
                    int         remove_trailing_zeroes = FALSE;

                    f =
# ifndef HAVE_STDARG_H
                        get_a_arg(arg_idx);
# else
#  if defined(FEAT_EVAL)
                        tvs != NULL ? tv_float(tvs, &arg_idx) :
#  endif
                            va_arg(ap, double);
# endif
                    abs_f = f < 0 ? -f : f;

                    if (fmt_spec == 'g' || fmt_spec == 'G')
                    {
                        /* Would be nice to use %g directly, but it prints
                         * "1.0" as "1", we don't want that. */
                        if ((abs_f >= 0.001 && abs_f < 10000000.0)
                                                              || abs_f == 0.0)
                            fmt_spec = 'f';
                        else
                            fmt_spec = fmt_spec == 'g' ? 'e' : 'E';
                        remove_trailing_zeroes = TRUE;
                    }

                    if (fmt_spec == 'f' &&
#ifdef VAX
                            abs_f > 1.0e38
#else
                            abs_f > 1.0e307
#endif
                            )
                    {
                        /* Avoid a buffer overflow */
                        strcpy(tmp, "inf");
                        str_arg_l = 3;
                    }
                    else
                    {
                        format[0] = '%';
                        l = 1;
                        if (precision_specified)
                        {
                            size_t max_prec = TMP_LEN - 10;

                            /* Make sure we don't get more digits than we
                             * have room for. */
                            if (fmt_spec == 'f' && abs_f > 1.0)
                                max_prec -= (size_t)log10(abs_f);
                            if (precision > max_prec)
                                precision = max_prec;
                            l += sprintf(format + 1, ".%d", (int)precision);
                        }
                        format[l] = fmt_spec;
                        format[l + 1] = NUL;
                        str_arg_l = sprintf(tmp, format, f);

                        if (remove_trailing_zeroes)
                        {
                            int i;
                            char *tp;

                            /* Using %g or %G: remove superfluous zeroes. */
                            if (fmt_spec == 'f')
                                tp = tmp + str_arg_l - 1;
                            else
                            {
                                tp = (char *)vim_strchr((char_u *)tmp,
                                                 fmt_spec == 'e' ? 'e' : 'E');
                                if (tp != NULL)
                                {
                                    /* Remove superfluous '+' and leading
                                     * zeroes from the exponent. */
                                    if (tp[1] == '+')
                                    {
                                        /* Change "1.0e+07" to "1.0e07" */
                                        STRMOVE(tp + 1, tp + 2);
                                        --str_arg_l;
                                    }
                                    i = (tp[1] == '-') ? 2 : 1;
                                    while (tp[i] == '0')
                                    {
                                        /* Change "1.0e07" to "1.0e7" */
                                        STRMOVE(tp + i, tp + i + 1);
                                        --str_arg_l;
                                    }
                                    --tp;
                                }
                            }

                            if (tp != NULL && !precision_specified)
                                /* Remove trailing zeroes, but keep the one
                                 * just after a dot. */
                                while (tp > tmp + 2 && *tp == '0'
                                                             && tp[-1] != '.')
                                {
                                    STRMOVE(tp, tp + 1);
                                    --tp;
                                    --str_arg_l;
                                }
                        }
                        else
                        {
                            char *tp;

                            /* Be consistent: some printf("%e") use 1.0e+12
                             * and some 1.0e+012.  Remove one zero in the last
                             * case. */
                            tp = (char *)vim_strchr((char_u *)tmp,
                                                 fmt_spec == 'e' ? 'e' : 'E');
                            if (tp != NULL && (tp[1] == '+' || tp[1] == '-')
                                          && tp[2] == '0'
                                          && vim_isdigit(tp[3])
                                          && vim_isdigit(tp[4]))
                            {
                                STRMOVE(tp + 2, tp + 3);
                                --str_arg_l;
                            }
                        }
                    }
                    str_arg = tmp;
                    break;
                }
#endif

            default:
                /* unrecognized conversion specifier, keep format string
                 * as-is */
                zero_padding = 0;  /* turn zero padding off for non-numeric
                                      conversion */
                justify_left = 1;
                min_field_width = 0;                /* reset flags */

                /* discard the unrecognized conversion, just keep *
                 * the unrecognized conversion character          */
                str_arg = p;
                str_arg_l = 0;
                if (*p != NUL)
                    str_arg_l++;  /* include invalid conversion specifier
                                     unchanged if not at end-of-string */
                break;
            }

            if (*p != NUL)
                p++;     /* step over the just processed conversion specifier */

            /* insert padding to the left as requested by min_field_width;
             * this does not include the zero padding in case of numerical
             * conversions*/
            if (!justify_left)
            {
                /* left padding with blank or zero */
                int pn = (int)(min_field_width - (str_arg_l + number_of_zeros_to_pad));

                if (pn > 0)
                {
                    if (str_l < str_m)
                    {
                        size_t avail = str_m - str_l;

                        vim_memset(str + str_l, zero_padding ? '0' : ' ',
                                             (size_t)pn > avail ? avail
                                                                : (size_t)pn);
                    }
                    str_l += pn;
                }
            }

            /* zero padding as requested by the precision or by the minimal
             * field width for numeric conversions required? */
            if (number_of_zeros_to_pad == 0)
            {
                /* will not copy first part of numeric right now, *
                 * force it to be copied later in its entirety    */
                zero_padding_insertion_ind = 0;
            }
            else
            {
                /* insert first part of numerics (sign or '0x') before zero
                 * padding */
                int zn = (int)zero_padding_insertion_ind;

                if (zn > 0)
                {
                    if (str_l < str_m)
                    {
                        size_t avail = str_m - str_l;

                        mch_memmove(str + str_l, str_arg,
                                             (size_t)zn > avail ? avail
                                                                : (size_t)zn);
                    }
                    str_l += zn;
                }

                /* insert zero padding as requested by the precision or min
                 * field width */
                zn = (int)number_of_zeros_to_pad;
                if (zn > 0)
                {
                    if (str_l < str_m)
                    {
                        size_t avail = str_m-str_l;

                        vim_memset(str + str_l, '0',
                                             (size_t)zn > avail ? avail
                                                                : (size_t)zn);
                    }
                    str_l += zn;
                }
            }

            /* insert formatted string
             * (or as-is conversion specifier for unknown conversions) */
            {
                int sn = (int)(str_arg_l - zero_padding_insertion_ind);

                if (sn > 0)
                {
                    if (str_l < str_m)
                    {
                        size_t avail = str_m - str_l;

                        mch_memmove(str + str_l,
                                str_arg + zero_padding_insertion_ind,
                                (size_t)sn > avail ? avail : (size_t)sn);
                    }
                    str_l += sn;
                }
            }

            /* insert right padding */
            if (justify_left)
            {
                /* right blank padding to the field width */
                int pn = (int)(min_field_width
                                      - (str_arg_l + number_of_zeros_to_pad));

                if (pn > 0)
                {
                    if (str_l < str_m)
                    {
                        size_t avail = str_m - str_l;

                        vim_memset(str + str_l, ' ',
                                             (size_t)pn > avail ? avail
                                                                : (size_t)pn);
                    }
                    str_l += pn;
                }
            }
        }
    }

    if (str_m > 0)
    {
        /* make sure the string is nul-terminated even at the expense of
         * overwriting the last character (shouldn't happen, but just in case)
         * */
        str[str_l <= str_m - 1 ? str_l : str_m - 1] = '\0';
    }

#ifdef HAVE_STDARG_H
    if (tvs != NULL && tvs[arg_idx - 1].v_type != VAR_UNKNOWN)
        EMSG(_("E767: Too many arguments to printf()"));
#endif

    /* Return the number of characters formatted (excluding trailing nul
     * character), that is, the number of characters that would have been
     * written to the buffer if it were large enough. */
    return (int)str_l;
}

#endif /* PROTO */