Adding upstream version 2:9.0.1378.upstream/2%9.0.1378upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 4422 insertions, 0 deletions

diff --git a/src/message.c b/src/message.c
new file mode 100644
index 0000000..18f3013
--- /dev/null
+++ b/src/message.c
@@ -0,0 +1,4422 @@
+/* vi:set ts=8 sts=4 sw=4 noet:
+ *
+ * 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"
+
+static void add_msg_hist(char_u *s, int len, int attr);
+static void hit_return_msg(void);
+static void msg_home_replace_attr(char_u *fname, int attr);
+static void msg_puts_attr_len(char *str, int maxlen, int attr);
+static void msg_puts_display(char_u *str, int maxlen, int attr, int recurse);
+static void msg_scroll_up(void);
+static void inc_msg_scrolled(void);
+static void store_sb_text(char_u **sb_str, char_u *s, int attr, int *sb_col, int finish);
+static void t_puts(int *t_col, char_u *t_s, char_u *s, int attr);
+static void msg_puts_printf(char_u *str, int maxlen);
+static int do_more_prompt(int typed_char);
+static void msg_screen_putchar(int c, int attr);
+static void msg_moremsg(int full);
+static int  msg_check_screen(void);
+static void redir_write(char_u *s, int maxlen);
+#ifdef FEAT_CON_DIALOG
+static char_u *msg_show_console_dialog(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
+static void display_confirm_msg(void);
+#endif
+#ifdef FEAT_EVAL
+static int emsg_to_channel_log = FALSE;
+#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;
+
+static FILE *verbose_fd = NULL;
+static int  verbose_did_open = FALSE;
+
+/*
+ * 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.  -1 when not set.
+ * 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(char *s)
+{
+    return msg_attr_keep(s, 0, FALSE);
+}
+
+/*
+ * Like msg() but keep it silent when 'verbosefile' is set.
+ */
+    int
+verb_msg(char *s)
+{
+    int		n;
+
+    verbose_enter();
+    n = msg_attr_keep(s, 0, FALSE);
+    verbose_leave();
+
+    return n;
+}
+
+    int
+msg_attr(char *s, int attr)
+{
+    return msg_attr_keep(s, attr, FALSE);
+}
+
+    int
+msg_attr_keep(
+    char	*s,
+    int		attr,
+    int		keep)	    // TRUE: set keep_msg if it doesn't scroll
+{
+    static int	entered = 0;
+    int		retval;
+    char_u	*buf = NULL;
+
+    // Skip messages not matching ":filter pattern".
+    // Don't filter when there is an error.
+    if (!emsg_on_display && message_filtered((char_u *)s))
+	return TRUE;
+
+#ifdef FEAT_EVAL
+    if (attr == 0)
+	set_vim_var_string(VV_STATUSMSG, (char_u *)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 ((char_u *)s != keep_msg
+	    || (*s != '<'
+		&& last_msg_hist != NULL
+		&& last_msg_hist->msg != NULL
+		&& STRCMP(s, last_msg_hist->msg)))
+	add_msg_hist((char_u *)s, -1, attr);
+
+#ifdef FEAT_EVAL
+    if (emsg_to_channel_log)
+	// Write message in the channel log.
+	ch_log(NULL, "ERROR: %s", s);
+#endif
+
+    // Truncate the message if needed.
+    msg_start();
+    buf = msg_strtrunc((char_u *)s, FALSE);
+    if (buf != NULL)
+	s = (char *)buf;
+
+    msg_outtrans_attr((char_u *)s, attr);
+    msg_clr_eos();
+    retval = msg_end();
+
+    if (keep && retval && vim_strsize((char_u *)s)
+			    < (int)(Rows - cmdline_row - 1) * Columns + sc_col)
+	set_keep_msg((char_u *)s, 0);
+
+    need_fileinfo = FALSE;
+
+    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(
+    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
+#ifdef HAS_MESSAGE_WINDOW
+		|| in_echowindow
+#endif
+		)
+	    // 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)
+	{
+	    if (enc_utf8)
+		// may have up to 18 bytes per cell (6 per char, up to two
+		// composing chars)
+		len = (room + 2) * 18;
+	    else if (enc_dbcs == DBCS_JPNU)
+		// may have up to 2 bytes per cell for euc-jp
+		len = (room + 2) * 2;
+	    else
+		len = room + 2;
+	    buf = alloc(len);
+	    if (buf != NULL)
+		trunc_string(s, buf, room, len);
+	}
+    }
+    return buf;
+}
+
+/*
+ * Truncate a string "s" to "buf" with cell width "room".
+ * "s" and "buf" may be equal.
+ */
+    void
+trunc_string(
+    char_u	*s,
+    char_u	*buf,
+    int		room_in,
+    int		buflen)
+{
+    size_t	room = room_in - 3; // "..." takes 3 chars
+    size_t	half;
+    size_t	len = 0;
+    int		e;
+    int		i;
+    int		n;
+
+    if (*s == NUL)
+    {
+	if (buflen > 0)
+	    *buf = NUL;
+	return;
+    }
+
+    if (room_in < 3)
+	room = 0;
+    half = room / 2;
+
+    // First part: Start of the string.
+    for (e = 0; len < half && e < buflen; ++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];
+	if (has_mbyte)
+	    for (n = (*mb_ptr2len)(s + e); --n > 0; )
+	    {
+		if (++e == buflen)
+		    break;
+		buf[e] = s[e];
+	    }
+    }
+
+    // Last part: End of the string.
+    i = e;
+    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 - utf_head_off(s, s + half - 1) - 1;
+	    while (half > 0 && utf_iscomposing(utf_ptr2char(s + half)));
+	    n = ptr2cells(s + half);
+	    if (len + n > room || half == 0)
+		break;
+	    len += n;
+	    i = (int)half;
+	}
+    }
+    else
+    {
+	for (i = (int)STRLEN(s);
+		   i - 1 >= 0 && len + (n = ptr2cells(s + i - 1)) <= room; --i)
+	    len += n;
+    }
+
+
+    if (i <= e + 3)
+    {
+	// text fits without truncating
+	if (s != buf)
+	{
+	    len = STRLEN(s);
+	    if (len >= (size_t)buflen)
+		len = buflen - 1;
+	    len = len - e + 1;
+	    if (len < 1)
+		buf[e - 1] = NUL;
+	    else
+		mch_memmove(buf + e, s + e, len);
+	}
+    }
+    else if (e + 3 < buflen)
+    {
+	// set the middle and copy the last part
+	mch_memmove(buf + e, "...", (size_t)3);
+	len = STRLEN(s + i) + 1;
+	if (len >= (size_t)buflen - e - 3)
+	    len = buflen - e - 3 - 1;
+	mch_memmove(buf + e + 3, s + i, len);
+	buf[e + 3 + len - 1] = NUL;
+    }
+    else
+    {
+	// can't fit in the "...", just truncate it
+	buf[e - 1] = NUL;
+    }
+}
+
+/*
+ * Automatic prototype generation does not understand this function.
+ * Note: Caller of smsg() and smsg_attr() must check the resulting string is
+ * shorter than IOSIZE!!!
+ */
+#ifndef PROTO
+
+int vim_snprintf(char *str, size_t str_m, const char *fmt, ...);
+
+    int
+smsg(const char *s, ...)
+{
+    if (IObuff == NULL)
+    {
+	// Very early in initialisation and already something wrong, just
+	// give the raw message so the user at least gets a hint.
+	return msg((char *)s);
+    }
+
+    va_list arglist;
+
+    va_start(arglist, s);
+    vim_vsnprintf((char *)IObuff, IOSIZE, s, arglist);
+    va_end(arglist);
+    return msg((char *)IObuff);
+}
+
+    int
+smsg_attr(int attr, const char *s, ...)
+{
+    if (IObuff == NULL)
+    {
+	// Very early in initialisation and already something wrong, just
+	// give the raw message so the user at least gets a hint.
+	return msg_attr((char *)s, attr);
+    }
+
+    va_list arglist;
+
+    va_start(arglist, s);
+    vim_vsnprintf((char *)IObuff, IOSIZE, s, arglist);
+    va_end(arglist);
+    return msg_attr((char *)IObuff, attr);
+}
+
+    int
+smsg_attr_keep(int attr, const char *s, ...)
+{
+    if (IObuff == NULL)
+    {
+	// Very early in initialisation and already something wrong, just
+	// give the raw message so the user at least gets a hint.
+	return msg_attr_keep((char *)s, attr, TRUE);
+    }
+
+    va_list arglist;
+
+    va_start(arglist, s);
+    vim_vsnprintf((char *)IObuff, IOSIZE, s, arglist);
+    va_end(arglist);
+    return msg_attr_keep((char *)IObuff, attr, TRUE);
+}
+
+#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(void)
+{
+    VIM_CLEAR(last_sourcing_name);
+    last_sourcing_lnum = 0;
+}
+
+/*
+ * Return TRUE if "SOURCING_NAME" differs from "last_sourcing_name".
+ */
+    static int
+other_sourcing_name(void)
+{
+    if (HAVE_SOURCING_INFO && 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(void)
+{
+    char_u	*Buf, *p;
+
+    if (HAVE_SOURCING_INFO && SOURCING_NAME != NULL && other_sourcing_name())
+    {
+	char_u	    *sname = estack_sfile(ESTACK_NONE);
+	char_u	    *tofree = sname;
+
+	if (sname == NULL)
+	    sname = SOURCING_NAME;
+
+#ifdef FEAT_EVAL
+	if (estack_compiling)
+	    p = (char_u *)_("Error detected while compiling %s:");
+	else
+#endif
+	    p = (char_u *)_("Error detected while processing %s:");
+	Buf = alloc(STRLEN(sname) + STRLEN(p));
+	if (Buf != NULL)
+	    sprintf((char *)Buf, (char *)p, sname);
+	vim_free(tofree);
+	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(void)
+{
+    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(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(int attr)
+{
+    char_u	*p;
+    static int	recursive = FALSE;
+
+    // Bail out if something called here causes an error.
+    if (recursive)
+	return;
+    recursive = TRUE;
+
+    ++no_wait_return;
+    p = get_emsg_source();
+    if (p != NULL)
+    {
+	msg_scroll = TRUE;  // this will take more than one line
+	msg_attr((char *)p, attr);
+	vim_free(p);
+    }
+    p = get_emsg_lnum();
+    if (p != NULL)
+    {
+	msg_attr((char *)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_CLEAR(last_sourcing_name);
+	if (SOURCING_NAME != NULL)
+	    last_sourcing_name = vim_strsave(SOURCING_NAME);
+    }
+    --no_wait_return;
+
+    recursive = FALSE;
+}
+
+/*
+ * 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.
+ */
+    static int
+emsg_not_now(void)
+{
+    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;
+}
+
+#if defined(FEAT_EVAL) || defined(PROTO)
+static garray_T ignore_error_list = GA_EMPTY;
+
+    void
+ignore_error_for_testing(char_u *error)
+{
+    if (ignore_error_list.ga_itemsize == 0)
+	ga_init2(&ignore_error_list, sizeof(char_u *), 1);
+
+    if (STRCMP("RESET", error) == 0)
+	ga_clear_strings(&ignore_error_list);
+    else
+	ga_copy_string(&ignore_error_list, error);
+}
+
+    static int
+ignore_error(char_u *msg)
+{
+    int i;
+
+    for (i = 0; i < ignore_error_list.ga_len; ++i)
+	if (strstr((char *)msg,
+		  (char *)((char_u **)(ignore_error_list.ga_data))[i]) != NULL)
+	    return TRUE;
+    return FALSE;
+}
+#endif
+
+#if !defined(HAVE_STRERROR) || defined(PROTO)
+/*
+ * Replacement for perror() that behaves more or less like emsg() was called.
+ * v:errmsg will be set and called_emsg will be incremented.
+ */
+    void
+do_perror(char *msg)
+{
+    perror(msg);
+    ++emsg_silent;
+    emsg(msg);
+    --emsg_silent;
+}
+#endif
+
+/*
+ * emsg_core() - 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.
+ * Note: caller must check 'emsg_not_now()' before calling this.
+ */
+    static int
+emsg_core(char_u *s)
+{
+    int		attr;
+    char_u	*p;
+    int		r;
+#ifdef FEAT_EVAL
+    int		ignore = FALSE;
+    int		severe;
+#endif
+
+#ifdef FEAT_EVAL
+    // When testing some errors are turned into a normal message.
+    if (ignore_error(s))
+	// don't call msg() if it results in a dialog
+	return msg_use_printf() ? FALSE : msg((char *)s);
+#endif
+
+    ++called_emsg;
+
+#ifdef FEAT_EVAL
+    // If "emsg_severe" is TRUE: When an error exception is to be thrown,
+    // prefer this message over previous messages for the same command.
+    severe = emsg_severe;
+    emsg_severe = FALSE;
+#endif
+
+    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;
+	    return TRUE;
+	}
+
+	if (in_assert_fails && emsg_assert_fails_msg == NULL)
+	{
+	    emsg_assert_fails_msg = vim_strsave(s);
+	    emsg_assert_fails_lnum = SOURCING_LNUM;
+	    vim_free(emsg_assert_fails_context);
+	    emsg_assert_fails_context = vim_strsave(
+			 SOURCING_NAME == NULL ? (char_u *)"" : SOURCING_NAME);
+	}
+
+	// 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)
+	{
+#ifdef FEAT_EVAL
+	    ++did_emsg_silent;
+#endif
+	    if (emsg_noredir == 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);
+	    }
+#ifdef FEAT_EVAL
+	    // Only increment did_emsg_def when :silent! wasn't used inside the
+	    // :def function.
+	    if (emsg_silent == emsg_silent_def)
+		++did_emsg_def;
+#endif
+#ifdef FEAT_EVAL
+	    ch_log(NULL, "ERROR silent: %s", (char *)s);
+#endif
+	    return TRUE;
+	}
+
+	ex_exitval = 1;
+
+	// 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(FLUSH_MINIMAL);  // flush internal buffers
+	++did_emsg;			   // flag for DoOneCmd()
+#ifdef FEAT_EVAL
+	++uncaught_emsg;
+#endif
+    }
+
+#ifdef HAS_MESSAGE_WINDOW
+    if (!in_echowindow)
+#endif
+	emsg_on_display = TRUE;	    // remember there is an error 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
+
+#ifdef FEAT_JOB_CHANNEL
+    emsg_to_channel_log = TRUE;
+#endif
+    /*
+     * Display name and line number for the source of the error.
+     */
+    msg_scroll = TRUE;
+    msg_source(attr);
+
+    /*
+     * Display the error message itself.
+     */
+    msg_nowait = FALSE;			// wait for this msg
+    r = msg_attr((char *)s, attr);
+
+#ifdef FEAT_JOB_CHANNEL
+    emsg_to_channel_log = FALSE;
+#endif
+    return r;
+}
+
+/*
+ * Print an error message.
+ */
+    int
+emsg(char *s)
+{
+    // Skip this if not giving error messages at the moment.
+    if (!emsg_not_now())
+	return emsg_core((char_u *)s);
+    return TRUE;		// no error messages at the moment
+}
+
+#ifndef PROTO  // manual proto with __attribute__
+/*
+ * Print an error message with format string and variable arguments.
+ * Note: caller must not pass 'IObuff' as 1st argument.
+ */
+    int
+semsg(const char *s, ...)
+{
+    // Skip this if not giving error messages at the moment.
+    if (!emsg_not_now())
+    {
+	if (IObuff == NULL)
+	{
+	    // Very early in initialisation and already something wrong, just
+	    // give the raw message so the user at least gets a hint.
+	    return emsg_core((char_u *)s);
+	}
+	else
+	{
+	    va_list ap;
+
+	    va_start(ap, s);
+	    vim_vsnprintf((char *)IObuff, IOSIZE, s, ap);
+	    va_end(ap);
+	    return emsg_core(IObuff);
+	}
+    }
+    return TRUE;		// no error messages at the moment
+}
+#endif
+
+/*
+ * Same as emsg(...), but abort on error when ABORT_ON_INTERNAL_ERROR is
+ * defined. It is used for internal errors only, so that they can be
+ * detected when fuzzing vim.
+ */
+    void
+iemsg(char *s)
+{
+    if (emsg_not_now())
+	return;
+
+    emsg_core((char_u *)s);
+#if defined(ABORT_ON_INTERNAL_ERROR) && defined(FEAT_EVAL)
+    set_vim_var_string(VV_ERRMSG, (char_u *)s, -1);
+    msg_putchar('\n');  // avoid overwriting the error message
+    out_flush();
+    abort();
+#endif
+}
+
+#ifndef PROTO  // manual proto with __attribute__
+/*
+ * Same as semsg(...) but abort on error when ABORT_ON_INTERNAL_ERROR is
+ * defined. It is used for internal errors only, so that they can be
+ * detected when fuzzing vim.
+ * Note: caller must not pass 'IObuff' as 1st argument.
+ */
+    void
+siemsg(const char *s, ...)
+{
+    if (emsg_not_now())
+	return;
+
+    if (IObuff == NULL)
+    {
+	// Very early in initialisation and already something wrong, just
+	// give the raw message so the user at least gets a hint.
+	emsg_core((char_u *)s);
+    }
+    else
+    {
+	va_list ap;
+
+	va_start(ap, s);
+	vim_vsnprintf((char *)IObuff, IOSIZE, s, ap);
+	va_end(ap);
+	emsg_core(IObuff);
+    }
+# ifdef ABORT_ON_INTERNAL_ERROR
+    msg_putchar('\n');  // avoid overwriting the error message
+    out_flush();
+    abort();
+# endif
+}
+#endif
+
+/*
+ * Give an "Internal error" message.
+ */
+    void
+internal_error(char *where)
+{
+    siemsg(_(e_internal_error_str), where);
+}
+
+#if defined(FEAT_EVAL) || defined(PROTO)
+/*
+ * Like internal_error() but do not call abort(), to avoid tests using
+ * test_unknown() and test_void() causing Vim to exit.
+ */
+    void
+internal_error_no_abort(char *where)
+{
+     semsg(_(e_internal_error_str), where);
+}
+#endif
+
+// emsg3() and emsgn() are in misc2.c to avoid warnings for the prototypes.
+
+    void
+emsg_invreg(int name)
+{
+    semsg(_(e_invalid_register_name_str), transchar_buf(NULL, name));
+}
+
+#if defined(FEAT_EVAL) || defined(PROTO)
+/*
+ * Give an error message which contains %s for "name[len]".
+ */
+    void
+emsg_namelen(char *msg, char_u *name, int len)
+{
+    char_u *copy = vim_strnsave(name, len);
+
+    semsg(msg, copy == NULL ? "NULL" : (char *)copy);
+    vim_free(copy);
+}
+#endif
+
+/*
+ * 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 *
+msg_trunc_attr(char *s, int force, int attr)
+{
+    int		n;
+    char	*ts;
+
+    // Add message to history before truncating
+    add_msg_hist((char_u *)s, -1, attr);
+
+    ts = (char *)msg_may_trunc(force, (char_u *)s);
+
+    msg_hist_off = TRUE;
+    n = msg_attr(ts, attr);
+    msg_hist_off = FALSE;
+
+    if (n)
+	return ts;
+    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(int force, char_u *s)
+{
+    int		n;
+    int		room;
+
+    // If 'cmdheight' is zero or something unexpected happened "room" may be
+    // negative.
+    room = (int)(Rows - cmdline_row - 1) * Columns + sc_col - 1;
+    if (room > 0 && (force || (shortmess(SHM_TRUNC) && !exmode_active))
+	    && (n = (int)STRLEN(s) - room) > 0)
+    {
+	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;
+	}
+	s += n;
+	*s = '<';
+    }
+    return s;
+}
+
+    static void
+add_msg_hist(
+    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 = ALLOC_ONE(struct msg_hist);
+    if (p == NULL)
+	return;
+
+    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(void)
+{
+    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(exarg_T *eap)
+{
+    struct msg_hist *p;
+    char_u	    *s;
+    int		    c = 0;
+
+    if (STRCMP(eap->arg, "clear") == 0)
+    {
+	int keep = eap->addr_count == 0 ? 0 : eap->line2;
+
+	while (msg_hist_len > keep)
+	    (void)delete_first_msg();
+	return;
+    }
+
+    if (*eap->arg != NUL)
+    {
+	emsg(_(e_invalid_argument));
+	return;
+    }
+
+    msg_hist_off = TRUE;
+
+    p = first_msg_hist;
+    if (eap->addr_count != 0)
+    {
+	// Count total messages
+	for (; p != NULL && !got_int; p = p->next)
+	    c++;
+
+	c -= eap->line2;
+
+	// Skip without number of messages specified
+	for (p = first_msg_hist; p != NULL && !got_int && c > 0;
+						    p = p->next, c--);
+    }
+
+    if (p == first_msg_hist)
+    {
+#ifdef FEAT_MULTI_LANG
+	s = get_mess_lang();
+#else
+	s = mch_getenv((char_u *)"LANG");
+#endif
+	if (s != NULL && *s != NUL)
+	    // The next comment is extracted by xgettext and put in po file for
+	    // translators to read.
+	    msg_attr(
+		    // Translator: Please replace the name and email address
+		    // with the appropriate text for your translation.
+		    _("Messages maintainer: Bram Moolenaar <Bram@vim.org>"),
+		    HL_ATTR(HLF_T));
+    }
+
+    // Display what was not skipped.
+    for (; p != NULL && !got_int; p = p->next)
+	if (p->msg != NULL)
+	    msg_attr((char *)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(void)
+{
+    need_wait_return = FALSE;
+    emsg_on_display = FALSE;
+    cmdline_row = msg_row;
+    msg_col = 0;
+    msg_clr_eos();
+    lines_left = -1;
+}
+#endif
+
+/*
+ * Wait for the user to hit a key (normally Enter).
+ * 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(int redraw)
+{
+    int		c;
+    int		oldState;
+    int		tmpState;
+    int		had_got_int;
+    int		save_reg_recording;
+    FILE	*save_scriptout;
+
+    if (redraw == TRUE)
+	set_must_redraw(UPD_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;
+#ifdef HAS_MESSAGE_WINDOW
+    if (in_echowindow)
+	return;
+#endif
+
+    /*
+     * When inside vgetc(), we can't wait for a typed character at all.
+     * 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.
+     */
+    if (vgetc_busy > 0)
+	return;
+    need_wait_return = TRUE;
+    if (no_wait_return)
+    {
+	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 = MODE_HITRETURN;
+	setmouse();
+#ifdef USE_ON_FLY_SCROLL
+	dont_scroll = TRUE;		// disallow scrolling here
+#endif
+	cmdline_row = msg_row;
+
+	// Avoid the sequence that the user types ":" at the hit-return prompt
+	// to start an Ex command, but the file-changed dialog gets in the
+	// way.
+	if (need_check_timestamps)
+	    check_timestamps(FALSE);
+
+	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;
+
+	    // Temporarily disable Recording. If Recording is active, the
+	    // character will be recorded later, since it will be added to the
+	    // typebuf after the loop
+	    save_reg_recording = reg_recording;
+	    save_scriptout = scriptout;
+	    reg_recording = 0;
+	    scriptout = NULL;
+	    c = safe_vgetc();
+	    if (had_got_int && !global_busy)
+		got_int = FALSE;
+	    --no_mapping;
+	    --allow_keys;
+	    reg_recording = save_reg_recording;
+	    scriptout = save_scriptout;
+
+#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 || c == K_PAGEUP)
+		{
+		    if (msg_scrolled > Rows)
+			// scroll back to show older messages
+			do_more_prompt(c);
+		    else
+		    {
+			msg_didout = FALSE;
+			c = K_IGNORE;
+			msg_col =
+#ifdef FEAT_RIGHTLEFT
+			    cmdmsg_rl ? Columns - 1 :
+#endif
+			    0;
+		    }
+		    if (quit_more)
+		    {
+			c = CAR;		// just pretend CR was hit
+			quit_more = FALSE;
+			got_int = FALSE;
+		    }
+		    else if (c != K_IGNORE)
+		    {
+			c = K_IGNORE;
+			hit_return_msg();
+		    }
+		}
+		else if (msg_scrolled > Rows - 2
+			 && (c == 'j' || c == 'd' || c == 'f'
+					   || c == K_DOWN || c == K_PAGEDOWN))
+		    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
+				|| c == K_LEFTDRAG   || c == K_LEFTRELEASE
+				|| c == K_MIDDLEDRAG || c == K_MIDDLERELEASE
+				|| c == K_RIGHTDRAG  || c == K_RIGHTRELEASE
+				|| c == K_MOUSELEFT  || c == K_MOUSERIGHT
+				|| c == K_MOUSEDOWN  || c == K_MOUSEUP
+				|| c == K_MOUSEMOVE
+				|| (!mouse_has(MOUSE_RETURN)
+				    && mouse_row < msg_row
+				    && (c == K_LEFTMOUSE
+					|| c == K_MIDDLEMOUSE
+					|| c == K_RIGHTMOUSE
+					|| c == K_X1MOUSE
+					|| c == K_X2MOUSE))
+				);
+	ui_breakcheck();
+
+	// 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 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(vgetc_char, vgetc_mod_mask);
+	    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;
+#ifdef FEAT_TERMINAL
+	skip_term_loop = TRUE;
+#endif
+    }
+
+    /*
+     * 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
+    setmouse();
+    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_CLEAR(keep_msg);	    // don't redisplay message, it's too long
+
+    if (tmpState == MODE_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(UPD_VALID);
+    }
+}
+
+/*
+ * Write the hit-return prompt.
+ */
+    static void
+hit_return_msg(void)
+{
+    int		save_p_more = p_more;
+
+    p_more = FALSE;	// don't want to 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(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 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(void)
+{
+    if (keep_msg == NULL && last_msg_hist != NULL && msg_scrolled == 0
+						      && (State & MODE_NORMAL))
+	set_keep_msg(last_msg_hist->msg, last_msg_hist->attr);
+}
+
+/*
+ * Prepare for outputting characters in the command line.
+ */
+    void
+msg_start(void)
+{
+    int		did_return = FALSE;
+
+    if (!msg_silent)
+    {
+	VIM_CLEAR(keep_msg);
+	need_fileinfo = FALSE;
+    }
+
+#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
+
+#ifdef HAS_MESSAGE_WINDOW
+    if (in_echowindow)
+    {
+	if (popup_message_win_visible()
+		    && ((msg_col > 0 && (msg_scroll || !full_screen))
+			|| in_echowindow))
+	{
+	    win_T *wp = popup_get_message_win();
+
+	    // start a new line
+	    curbuf = wp->w_buffer;
+	    ml_append(wp->w_buffer->b_ml.ml_line_count,
+					      (char_u *)"", (colnr_T)0, FALSE);
+	    curbuf = curwin->w_buffer;
+	}
+	msg_col = 0;
+    }
+    else
+#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 || in_echowindow)
+    {
+	// 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(void)
+{
+    lines_left = cmdline_row;
+    msg_didany = FALSE;
+}
+
+    void
+msg_putchar(int c)
+{
+    msg_putchar_attr(c, 0);
+}
+
+    void
+msg_putchar_attr(int c, int attr)
+{
+    char_u	buf[MB_MAXBYTES + 1];
+
+    if (IS_SPECIAL(c))
+    {
+	buf[0] = K_SPECIAL;
+	buf[1] = K_SECOND(c);
+	buf[2] = K_THIRD(c);
+	buf[3] = NUL;
+    }
+    else
+	buf[(*mb_char2bytes)(c, buf)] = NUL;
+    msg_puts_attr((char *)buf, attr);
+}
+
+    void
+msg_outnum(long n)
+{
+    char	buf[20];
+
+    sprintf(buf, "%ld", n);
+    msg_puts(buf);
+}
+
+    void
+msg_home_replace(char_u *fname)
+{
+    msg_home_replace_attr(fname, 0);
+}
+
+#if defined(FEAT_FIND_ID) || defined(PROTO)
+    void
+msg_home_replace_hl(char_u *fname)
+{
+    msg_home_replace_attr(fname, HL_ATTR(HLF_D));
+}
+#endif
+
+    static void
+msg_home_replace_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 up to a NUL character.
+ * Use attributes 'attr'.
+ * Return the number of characters it takes on the screen.
+ */
+    int
+msg_outtrans(char_u *str)
+{
+    return msg_outtrans_attr(str, 0);
+}
+
+    int
+msg_outtrans_attr(char_u *str, int attr)
+{
+    return msg_outtrans_len_attr(str, (int)STRLEN(str), attr);
+}
+
+    int
+msg_outtrans_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(char_u *p, int attr)
+{
+    int		l;
+
+    if (has_mbyte && (l = (*mb_ptr2len)(p)) > 1)
+    {
+	msg_outtrans_len_attr(p, l, attr);
+	return p + l;
+    }
+    msg_puts_attr((char *)transchar_byte_buf(NULL, *p), attr);
+    return p + 1;
+}
+
+    int
+msg_outtrans_len_attr(char_u *msgstr, int len, int attr)
+{
+    int		retval = 0;
+    char_u	*str = msgstr;
+    char_u	*plain_start = msgstr;
+    char_u	*s;
+    int		mb_l;
+    int		c;
+    int		save_got_int = got_int;
+
+    // Only quit when got_int was set in here.
+    got_int = FALSE;
+
+    // if MSG_HIST flag set, add message to history
+    if (attr & MSG_HIST)
+    {
+	add_msg_hist(str, len, attr);
+	attr &= ~MSG_HIST;
+    }
+
+    // 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(" ", attr);
+
+    /*
+     * Go over the string.  Special characters are translated and printed.
+     * Normal characters are printed several at a time.
+     */
+    while (--len >= 0 && !got_int)
+    {
+	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((char *)plain_start,
+					       (int)(str - plain_start), attr);
+		plain_start = str + mb_l;
+		msg_puts_attr((char *)transchar_buf(NULL, c),
+					    attr == 0 ? HL_ATTR(HLF_8) : attr);
+		retval += char2cells(c);
+	    }
+	    len -= mb_l - 1;
+	    str += mb_l;
+	}
+	else
+	{
+	    s = transchar_byte_buf(NULL, *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((char *)plain_start,
+					       (int)(str - plain_start), attr);
+		plain_start = str + 1;
+		msg_puts_attr((char *)s, attr == 0 ? HL_ATTR(HLF_8) : attr);
+		retval += (int)STRLEN(s);
+	    }
+	    else
+		++retval;
+	    ++str;
+	}
+    }
+
+    if (str > plain_start && !got_int)
+	// print the printable chars at the end
+	msg_puts_attr_len((char *)plain_start, (int)(str - plain_start), attr);
+
+    got_int |= save_got_int;
+
+    return retval;
+}
+
+#if defined(FEAT_QUICKFIX) || defined(PROTO)
+    void
+msg_make(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' up to 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(
+    char_u	*strstart,
+    int		from,	// TRUE for lhs of a mapping
+    int		maxlen) // screen columns, 0 for unlimited
+{
+    char_u	*str = strstart;
+    int		retval = 0;
+    char	*text;
+    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 == ' ')
+	{
+	    text = "<Space>";
+	    ++str;
+	}
+	else
+	    text = (char *)str2special(&str, from, FALSE);
+	if (text[0] != NUL && text[1] == NUL)
+	    // single-byte character or illegal byte
+	    text = (char *)transchar_byte_buf(NULL, (char_u)text[0]);
+	len = vim_strsize((char_u *)text);
+	if (maxlen > 0 && retval + len >= maxlen)
+	    break;
+	// Highlight special keys
+	msg_puts_attr(text, len > 1
+		&& (*mb_ptr2len)((char_u *)text) <= 1 ? attr : 0);
+	retval += len;
+    }
+    return retval;
+}
+
+#if defined(FEAT_EVAL) || defined(FEAT_SPELL) || defined(PROTO)
+/*
+ * Return the lhs or rhs of a mapping, with the key codes turned into printable
+ * strings, in an allocated string.
+ */
+    char_u *
+str2special_save(
+    char_u  *str,
+    int	    replace_spaces,	// TRUE to replace " " with "<Space>".
+				// used for the lhs of mapping and keytrans().
+    int	    replace_lt)		// TRUE to replace "<" with "<lt>".
+{
+    garray_T	ga;
+    char_u	*p = str;
+
+    ga_init2(&ga, 1, 40);
+    while (*p != NUL)
+	ga_concat(&ga, str2special(&p, replace_spaces, replace_lt));
+    ga_append(&ga, NUL);
+    return (char_u *)ga.ga_data;
+}
+#endif
+
+/*
+ * Return the printable string for the key codes at "*sp".
+ * On illegal byte return a string with only that byte.
+ * Used for translating the lhs or rhs of a mapping to printable chars.
+ * Advances "sp" to the next code.
+ */
+    char_u *
+str2special(
+    char_u	**sp,
+    int		replace_spaces,	// TRUE to replace " " with "<Space>".
+				// used for the lhs of mapping and keytrans().
+    int		replace_lt)	// TRUE to replace "<" with "<lt>".
+{
+    int			c;
+    static char_u	buf[7];
+    char_u		*str = *sp;
+    int			modifiers = 0;
+    int			special = FALSE;
+
+    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;
+    }
+
+    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 (IS_SPECIAL(c) || modifiers)	// special key
+	    special = TRUE;
+    }
+
+    if (has_mbyte && !IS_SPECIAL(c) && MB_BYTE2LEN(c) > 1)
+    {
+	char_u	*p;
+
+	*sp = str;
+	// Try to un-escape a multi-byte character after modifiers.
+	p = mb_unescape(sp);
+	if (p != NULL)
+	    // Since 'special' is TRUE the multi-byte character 'c' will be
+	    // processed by get_special_key_name()
+	    c = (*mb_ptr2char)(p);
+	else
+	    // illegal byte
+	    *sp = str + 1;
+    }
+    else
+	// single-byte character, NUL or illegal byte
+	*sp = str + (*str == NUL ? 0 : 1);
+
+    // Make special keys and C0 control characters in <> form, also <M-Space>.
+    if (special
+	|| c < ' '
+	|| (replace_spaces && c == ' ')
+	|| (replace_lt && 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(char_u *sp, char_u *buf, int len)
+{
+    char_u	*s;
+
+    *buf = NUL;
+    while (*sp)
+    {
+	s = str2special(&sp, FALSE, FALSE);
+	if ((int)(STRLEN(s) + STRLEN(buf)) < len)
+	    STRCAT(buf, s);
+    }
+}
+
+/*
+ * print line for :print or :list command
+ */
+    void
+msg_prt_line(char_u *s, int list)
+{
+    int		c;
+    int		col = 0;
+    int		n_extra = 0;
+    int		c_extra = 0;
+    int		c_final = 0;
+    char_u	*p_extra = NULL;	    // init to make SASC shut up
+    int		n;
+    int		attr = 0;
+    char_u	*trail = NULL;
+    char_u	*lead = NULL;
+    int		in_multispace = FALSE;
+    int		multispace_pos = 0;
+    int		l;
+    char_u	buf[MB_MAXBYTES + 1];
+
+    if (curwin->w_p_list)
+	list = TRUE;
+
+    if (list)
+    {
+	// find start of trailing whitespace
+	if (curwin->w_lcs_chars.trail)
+	{
+	    trail = s + STRLEN(s);
+	    while (trail > s && VIM_ISWHITE(trail[-1]))
+		--trail;
+	}
+	// find end of leading whitespace
+	if (curwin->w_lcs_chars.lead
+				 || curwin->w_lcs_chars.leadmultispace != NULL)
+	{
+	    lead = s;
+	    while (VIM_ISWHITE(lead[0]))
+		lead++;
+	    // in a line full of spaces all of them are treated as trailing
+	    if (*lead == NUL)
+		lead = NULL;
+	}
+    }
+
+    // output a space for an empty line, otherwise the line will be
+    // overwritten
+    if (*s == NUL && !(list && curwin->w_lcs_chars.eol != NUL))
+	msg_putchar(' ');
+
+    while (!got_int)
+    {
+	if (n_extra > 0)
+	{
+	    --n_extra;
+	    if (n_extra == 0 && c_final)
+		c = c_final;
+	    else if (c_extra)
+		c = c_extra;
+	    else
+		c = *p_extra++;
+	}
+	else if (has_mbyte && (l = (*mb_ptr2len)(s)) > 1)
+	{
+	    col += (*mb_ptr2cells)(s);
+	    if (l >= MB_MAXBYTES)
+	    {
+		STRCPY(buf, "?");
+	    }
+	    else if (curwin->w_lcs_chars.nbsp != NUL && list
+		    && (mb_ptr2char(s) == 160
+			|| mb_ptr2char(s) == 0x202f))
+	    {
+		int len = mb_char2bytes(curwin->w_lcs_chars.nbsp, buf);
+
+		buf[len] = NUL;
+	    }
+	    else
+	    {
+		mch_memmove(buf, s, (size_t)l);
+		buf[l] = NUL;
+	    }
+	    msg_puts((char *)buf);
+	    s += l;
+	    continue;
+	}
+	else
+	{
+	    attr = 0;
+	    c = *s++;
+	    in_multispace = c == ' '
+		&& ((col > 0 && s[-2] == ' ') || *s == ' ');
+	    if (!in_multispace)
+		multispace_pos = 0;
+	    if (c == TAB && (!list || curwin->w_lcs_chars.tab1))
+	    {
+		// tab amount depends on current column
+#ifdef FEAT_VARTABS
+		n_extra = tabstop_padding(col, curbuf->b_p_ts,
+						    curbuf->b_p_vts_array) - 1;
+#else
+		n_extra = curbuf->b_p_ts - col % curbuf->b_p_ts - 1;
+#endif
+		if (!list)
+		{
+		    c = ' ';
+		    c_extra = ' ';
+		    c_final = NUL;
+		}
+		else
+		{
+		    c = (n_extra == 0 && curwin->w_lcs_chars.tab3)
+						? curwin->w_lcs_chars.tab3
+						: curwin->w_lcs_chars.tab1;
+		    c_extra = curwin->w_lcs_chars.tab2;
+		    c_final = curwin->w_lcs_chars.tab3;
+		    attr = HL_ATTR(HLF_8);
+		}
+	    }
+	    else if (c == 160 && list && curwin->w_lcs_chars.nbsp != NUL)
+	    {
+		c = curwin->w_lcs_chars.nbsp;
+		attr = HL_ATTR(HLF_8);
+	    }
+	    else if (c == NUL && list && curwin->w_lcs_chars.eol != NUL)
+	    {
+		p_extra = (char_u *)"";
+		c_extra = NUL;
+		c_final = NUL;
+		n_extra = 1;
+		c = curwin->w_lcs_chars.eol;
+		attr = HL_ATTR(HLF_AT);
+		--s;
+	    }
+	    else if (c != NUL && (n = byte2cells(c)) > 1)
+	    {
+		n_extra = n - 1;
+		p_extra = transchar_byte_buf(NULL, c);
+		c_extra = NUL;
+		c_final = 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 == ' ')
+	    {
+		if (list && lead != NULL && s <= lead && in_multispace
+			&& curwin->w_lcs_chars.leadmultispace != NULL)
+		{
+		    c = curwin->w_lcs_chars.leadmultispace[multispace_pos++];
+		    if (curwin->w_lcs_chars.leadmultispace[multispace_pos]
+									== NUL)
+			multispace_pos = 0;
+		    attr = HL_ATTR(HLF_8);
+		}
+		else if (lead != NULL && s <= lead
+					    && curwin->w_lcs_chars.lead != NUL)
+		{
+		    c = curwin->w_lcs_chars.lead;
+		    attr = HL_ATTR(HLF_8);
+		}
+		else if (trail != NULL && s > trail)
+		{
+		    c = curwin->w_lcs_chars.trail;
+		    attr = HL_ATTR(HLF_8);
+		}
+		else if (list && in_multispace
+			&& curwin->w_lcs_chars.multispace != NULL)
+		{
+		    c = curwin->w_lcs_chars.multispace[multispace_pos++];
+		    if (curwin->w_lcs_chars.multispace[multispace_pos] == NUL)
+			multispace_pos = 0;
+		    attr = HL_ATTR(HLF_8);
+		}
+		else if (list && curwin->w_lcs_chars.space != NUL)
+		{
+		    c = curwin->w_lcs_chars.space;
+		    attr = HL_ATTR(HLF_8);
+		}
+	    }
+	}
+
+	if (c == NUL)
+	    break;
+
+	msg_putchar_attr(c, attr);
+	col++;
+    }
+    msg_clr_eos();
+}
+
+/*
+ * Use screen_puts() to output one multi-byte character.
+ * Return the pointer "s" advanced to the next character.
+ */
+    static char_u *
+screen_puts_mbyte(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;
+}
+
+/*
+ * 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(char *s)
+{
+    msg_puts_attr(s, 0);
+}
+
+    void
+msg_puts_title(char *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!
+ */
+    static void
+msg_outtrans_long_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("...", HL_ATTR(HLF_8));
+    }
+    msg_outtrans_len_attr(longstr + len - slen, slen, attr);
+}
+
+    void
+msg_outtrans_long_attr(char_u *longstr, int attr)
+{
+    msg_outtrans_long_len_attr(longstr, (int)STRLEN(longstr), attr);
+}
+
+/*
+ * Basic function for writing a message with highlight attributes.
+ */
+    void
+msg_puts_attr(char *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(char *str, int maxlen, int attr)
+{
+    /*
+     * If redirection is on, also write to the redirection file.
+     */
+    redir_write((char_u *)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((char_u *)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
+    // Not needed when only using CR to move the cursor.
+    if (msg_scrolled != 0 && !msg_scrolled_ign && STRCMP(str, "\r") != 0)
+	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((char_u *)str, maxlen);
+    else
+	msg_puts_display((char_u *)str, maxlen, attr, FALSE);
+
+    need_fileinfo = FALSE;
+}
+
+// values for "where"
+#define PUT_APPEND 0		// append to "lnum"
+#define PUT_TRUNC 1		// replace "lnum"
+#define PUT_BELOW 2		// add below "lnum"
+				//
+#ifdef HAS_MESSAGE_WINDOW
+/*
+ * Put text "t_s" until "end" in the message window.
+ * "where" specifies where to put the text.
+ */
+    static void
+put_msg_win(win_T *wp, int where, char_u *t_s, char_u *end, linenr_T lnum)
+{
+    char_u  *p;
+
+    if (where == PUT_BELOW)
+    {
+	if (*end != NUL)
+	{
+	    p = vim_strnsave(t_s, end - t_s);
+	    if (p == NULL)
+		return;
+	}
+	else
+	    p = t_s;
+	ml_append_buf(wp->w_buffer, lnum, p, (colnr_T)0, FALSE);
+	if (p != t_s)
+	    vim_free(p);
+    }
+    else
+    {
+	char_u *newp;
+
+	curbuf = wp->w_buffer;
+	if (where == PUT_APPEND)
+	{
+	    newp = concat_str(ml_get(lnum), t_s);
+	    if (newp == NULL)
+		return;
+	    if (*end != NUL)
+		newp[STRLEN(ml_get(lnum)) + (end - t_s)] = NUL;
+	}
+	else
+	{
+	    newp = vim_strnsave(t_s, end - t_s);
+	    if (newp == NULL)
+		return;
+	}
+	ml_replace(lnum, newp, FALSE);
+	curbuf = curwin->w_buffer;
+    }
+    redraw_win_later(wp, UPD_NOT_VALID);
+
+    // set msg_col so that a newline is written if needed
+    msg_col += (int)(end - t_s);
+}
+#endif
+
+/*
+ * The display part of msg_puts_attr_len().
+ * May be called recursively to display scroll-back text.
+ */
+    static void
+msg_puts_display(
+    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
+    int		l;
+    int		cw;
+    char_u	*sb_str = str;
+    int		sb_col = msg_col;
+    int		wrap;
+    int		did_last_char;
+#ifdef HAS_MESSAGE_WINDOW
+    int		where = PUT_APPEND;
+    win_T	*msg_win = NULL;
+    linenr_T    lnum = 1;
+
+    if (in_echowindow)
+    {
+	msg_win = popup_get_message_win();
+
+	if (msg_win != NULL)
+	{
+	    if (!popup_message_win_visible())
+	    {
+		if (*str == NL)
+		{
+		    // When not showing the message window and the output
+		    // starts with a NL show the message normally.
+		    msg_win = NULL;
+		}
+		else
+		{
+		    // currently hidden, make it empty
+		    curbuf = msg_win->w_buffer;
+		    while ((curbuf->b_ml.ml_flags & ML_EMPTY) == 0)
+			ml_delete(1);
+		    curbuf = curwin->w_buffer;
+		}
+	    }
+	    else
+	    {
+		lnum = msg_win->w_buffer->b_ml.ml_line_count;
+		if (msg_col == 0)
+		    where = PUT_TRUNC;
+	    }
+	}
+    }
+#endif
+
+    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)
+		      || (has_mbyte && (*mb_ptr2cells)(s) > 1 && msg_col <= 2))
+		    :
+#endif
+		      ((*s != '\r' && msg_col + t_col >= Columns - 1)
+		       || (*s == TAB && msg_col + t_col >= ((Columns - 1) & ~7))
+		       || (has_mbyte && (*mb_ptr2cells)(s) > 1
+					 && msg_col + t_col >= Columns - 2)))))
+	{
+	    /*
+	     * 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
+#ifdef HAS_MESSAGE_WINDOW
+		if (msg_win != NULL)
+		{
+		    put_msg_win(msg_win, where, t_s, s, lnum);
+		    t_col = 0;
+		    where = PUT_BELOW;
+		}
+		else
+#endif
+		    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;
+
+#ifdef HAS_MESSAGE_WINDOW
+	    if (msg_win == NULL)
+#endif
+		// 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
+	       )
+	    {
+		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
+		    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);
+
+#ifdef HAS_MESSAGE_WINDOW
+	    if (msg_win == NULL)
+	    {
+#endif
+		inc_msg_scrolled();
+		need_wait_return = TRUE; // may need wait_return() in main()
+		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;
+#ifdef HAS_MESSAGE_WINDOW
+	    }
+#endif
+	    if (p_more && lines_left == 0 && State != MODE_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
+		    || (has_mbyte && (*mb_ptr2cells)(s) > 1
+					    && msg_col + t_col >= Columns - 1);
+	if (t_col > 0 && (wrap || *s == '\r' || *s == '\b'
+						 || *s == '\t' || *s == BELL))
+	{
+	    // output any postponed text
+#ifdef HAS_MESSAGE_WINDOW
+	    if (msg_win != NULL)
+	    {
+		put_msg_win(msg_win, where, t_s, s, lnum);
+		t_col = 0;
+		where = PUT_BELOW;
+	    }
+	    else
+#endif
+		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
+	{
+#ifdef HAS_MESSAGE_WINDOW
+	    if (msg_win != NULL)
+	    {
+		// Ignore a NL when the buffer is empty, it is used to scroll
+		// up the text.
+		if ((msg_win->w_buffer->b_ml.ml_flags & ML_EMPTY) == 0)
+		{
+		    put_msg_win(msg_win, PUT_BELOW, t_s, t_s, lnum);
+		    ++lnum;
+		}
+	    }
+	    else
+#endif
+		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;
+#ifdef HAS_MESSAGE_WINDOW
+	    where = PUT_TRUNC;
+#endif
+	}
+	else if (*s == '\b')	    // go to previous char
+	{
+	    if (msg_col)
+		--msg_col;
+	}
+	else if (*s == TAB)	    // translate Tab into spaces
+	{
+#ifdef HAS_MESSAGE_WINDOW
+	    if (msg_win != NULL)
+		msg_col = (msg_col + 7) % 8;
+	    else
+#endif
+		do
+		    msg_screen_putchar(' ', attr);
+		while (msg_col & 7);
+	}
+	else if (*s == BELL)		// beep (from ":sh")
+	    vim_beep(BO_SH);
+	else
+	{
+	    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;
+	    }
+
+	    // 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 (
+# ifdef FEAT_RIGHTLEFT
+		    cmdmsg_rl ||
+# endif
+		    (cw > 1 && msg_col + t_col >= Columns - 1))
+	    {
+		if (l > 1)
+		    s = screen_puts_mbyte(s, l, attr) - 1;
+		else
+		    msg_screen_putchar(*s, attr);
+	    }
+	    else
+	    {
+		// postpone this character until later
+		if (t_col == 0)
+		    t_s = s;
+		t_col += cw;
+		s += l - 1;
+	    }
+	}
+	++s;
+    }
+
+    // output any postponed text
+    if (t_col > 0)
+    {
+#ifdef HAS_MESSAGE_WINDOW
+	if (msg_win != NULL)
+	    put_msg_win(msg_win, where, t_s, s, lnum);
+	else
+#endif
+	    t_puts(&t_col, t_s, s, attr);
+    }
+
+#ifdef HAS_MESSAGE_WINDOW
+    if (msg_win != NULL)
+	popup_show_message_win();
+#endif
+    // Store the text for scroll back, unless it's a newline by itself.
+    if (p_more && !recurse && !(s == sb_str + 1 && *sb_str == '\n'))
+	store_sb_text(&sb_str, s, attr, &sb_col, FALSE);
+
+    msg_check();
+}
+
+/*
+ * Return TRUE when ":filter pattern" was used and "msg" does not match
+ * "pattern".
+ */
+    int
+message_filtered(char_u *msg)
+{
+    int match;
+
+    if (cmdmod.cmod_filter_regmatch.regprog == NULL)
+	return FALSE;
+    match = vim_regexec(&cmdmod.cmod_filter_regmatch, msg, (colnr_T)0);
+    return cmdmod.cmod_filter_force ? match : !match;
+}
+
+/*
+ * Scroll the screen up one line for displaying the next message line.
+ */
+    static void
+msg_scroll_up(void)
+{
+#ifdef HAS_MESSAGE_WINDOW
+    if (in_echowindow)
+	return;
+#endif
+#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
+    mch_disable_flush();
+    screen_del_lines(0, 0, 1, (int)Rows, TRUE, 0, NULL);
+    mch_enable_flush();
+
+    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(void)
+{
+#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;
+    set_must_redraw(UPD_VALID);
+}
+
+/*
+ * 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(msgchunk_T *mps);
+
+typedef enum {
+    SB_CLEAR_NONE = 0,
+    SB_CLEAR_ALL,
+    SB_CLEAR_CMDLINE_BUSY,
+    SB_CLEAR_CMDLINE_DONE
+} sb_clear_T;
+
+// When to clear text on next msg.
+static sb_clear_T do_clear_sb_text = SB_CLEAR_NONE;
+
+/*
+ * Store part of a printed message for displaying when scrolling back.
+ */
+    static void
+store_sb_text(
+    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 == SB_CLEAR_ALL
+	    || do_clear_sb_text == SB_CLEAR_CMDLINE_DONE)
+    {
+	clear_sb_text(do_clear_sb_text == SB_CLEAR_ALL);
+	msg_sb_eol();  // prevent messages from overlapping
+	do_clear_sb_text = SB_CLEAR_NONE;
+    }
+
+    if (s > *sb_str)
+    {
+	mp = alloc(offsetof(msgchunk_T, sb_text) + (s - *sb_str) + 1);
+	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(void)
+{
+    do_clear_sb_text = SB_CLEAR_ALL;
+}
+
+/*
+ * Starting to edit the command line: do not clear messages now.
+ */
+    void
+sb_text_start_cmdline(void)
+{
+    if (do_clear_sb_text == SB_CLEAR_CMDLINE_BUSY)
+	// Invoking command line recursively: the previous-level command line
+	// doesn't need to be remembered as it will be redrawn when returning
+	// to that level.
+	sb_text_restart_cmdline();
+    else
+    {
+	msg_sb_eol();
+	do_clear_sb_text = SB_CLEAR_CMDLINE_BUSY;
+    }
+}
+
+/*
+ * Redrawing the command line: clear the last unfinished line.
+ */
+    void
+sb_text_restart_cmdline(void)
+{
+    msgchunk_T *tofree;
+
+    // Needed when returning from nested command line.
+    do_clear_sb_text = SB_CLEAR_CMDLINE_BUSY;
+
+    if (last_msgchunk == NULL || last_msgchunk->sb_eol)
+	// No unfinished line: don't clear anything.
+	return;
+
+    tofree = msg_sb_start(last_msgchunk);
+    last_msgchunk = tofree->sb_prev;
+    if (last_msgchunk != NULL)
+	last_msgchunk->sb_next = NULL;
+    while (tofree != NULL)
+    {
+	msgchunk_T *tofree_next = tofree->sb_next;
+
+	vim_free(tofree);
+	tofree = tofree_next;
+    }
+}
+
+/*
+ * Ending to edit the command line: clear old lines but the last one later.
+ */
+    void
+sb_text_end_cmdline(void)
+{
+    do_clear_sb_text = SB_CLEAR_CMDLINE_DONE;
+}
+
+/*
+ * Clear any text remembered for scrolling back.
+ * When "all" is FALSE keep the last line.
+ * Called when redrawing the screen.
+ */
+    void
+clear_sb_text(int all)
+{
+    msgchunk_T	*mp;
+    msgchunk_T	**lastp;
+
+    if (all)
+	lastp = &last_msgchunk;
+    else
+    {
+	if (last_msgchunk == NULL)
+	    return;
+	lastp = &msg_sb_start(last_msgchunk)->sb_prev;
+    }
+
+    while (*lastp != NULL)
+    {
+	mp = (*lastp)->sb_prev;
+	vim_free(*lastp);
+	*lastp = mp;
+    }
+}
+
+/*
+ * "g<" command.
+ */
+    void
+show_sb_text(void)
+{
+    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(BO_MESS);
+    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(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;
+}
+
+/*
+ * Mark the last message chunk as finishing the line.
+ */
+    void
+msg_sb_eol(void)
+{
+    if (last_msgchunk != NULL)
+	last_msgchunk->sb_eol = TRUE;
+}
+
+/*
+ * Display a screen line from previously displayed text at row "row".
+ * When "clear_to_eol" is set clear the rest of the screen line.
+ * Returns a pointer to the text for the next line (can be NULL).
+ */
+    static msgchunk_T *
+disp_sb_line(int row, msgchunk_T *smp, int clear_to_eol)
+{
+    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 clearing the screen did not work (e.g. because of a background
+	// color and t_ut isn't set) clear until the last column here.
+	if (clear_to_eol)
+	    screen_fill(row, row + 1, msg_col, (int)Columns, ' ', ' ', 0);
+
+	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(
+    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;
+    // 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;
+    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(void)
+{
+    return (!msg_check_screen()
+#if defined(MSWIN) && (!defined(FEAT_GUI_MSWIN) || defined(VIMDLL))
+# ifdef VIMDLL
+	    || (!gui.in_use && !termcap_active)
+# else
+	    || !termcap_active
+# endif
+#endif
+	    || (swapping_screen() && !termcap_active)
+	       );
+}
+
+/*
+ * Print a message when there is no valid screen.
+ */
+    static void
+msg_puts_printf(char_u *str, int maxlen)
+{
+    char_u	*s = str;
+    char_u	*buf = NULL;
+    char_u	*p = s;
+
+#ifdef MSWIN
+    if (!(silent_mode && p_verbose == 0))
+	mch_settmode(TMODE_COOK);	// handle CR and NL correctly
+#endif
+    while ((maxlen < 0 || (int)(s - str) < maxlen) && *s != NUL)
+    {
+	if (!(silent_mode && p_verbose == 0))
+	{
+	    // NL --> CR NL translation (for Unix, not for "--version")
+	    if (*s == NL)
+	    {
+		int n = (int)(s - p);
+
+		buf = alloc(n + 3);
+		if (buf != NULL)
+		{
+		    memcpy(buf, p, n);
+		    if (!info_message)
+			buf[n++] = CAR;
+		    buf[n++] = NL;
+		    buf[n++] = NUL;
+		    if (info_message)   // informative message, not an error
+			mch_msg((char *)buf);
+		    else
+			mch_errmsg((char *)buf);
+		    vim_free(buf);
+		}
+		p = s + 1;
+	    }
+	}
+
+	// primitive way to compute the current column
+#ifdef FEAT_RIGHTLEFT
+	if (cmdmsg_rl)
+	{
+	    if (*s == CAR || *s == NL)
+		msg_col = Columns - 1;
+	    else
+		--msg_col;
+	}
+	else
+#endif
+	{
+	    if (*s == CAR || *s == NL)
+		msg_col = 0;
+	    else
+		++msg_col;
+	}
+	++s;
+    }
+
+    if (*p != NUL && !(silent_mode && p_verbose == 0))
+    {
+	char_u *tofree = NULL;
+
+	if (maxlen > 0 && vim_strlen_maxlen((char *)p, (size_t)maxlen)
+							     >= (size_t)maxlen)
+	{
+	    tofree = vim_strnsave(p, (size_t)maxlen);
+	    p = tofree;
+	}
+	if (p != NULL)
+	{
+	    if (info_message)
+		mch_msg((char *)p);
+	    else
+		mch_errmsg((char *)p);
+	    vim_free(tofree);
+	}
+    }
+
+    msg_didout = TRUE;	    // assume that line is not empty
+
+#ifdef MSWIN
+    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(int typed_char)
+{
+    static int	entered = FALSE;
+    int		used_typed_char = typed_char;
+    int		oldState = State;
+    int		c;
+#ifdef FEAT_CON_DIALOG
+    int		retval = FALSE;
+#endif
+    int		toscroll;
+    msgchunk_T	*mp_last = NULL;
+    msgchunk_T	*mp;
+    int		i;
+
+    // We get called recursively when a timer callback outputs a message. In
+    // that case don't show another prompt. Also when at the hit-Enter prompt
+    // and nothing was typed.
+    if (entered || (State == MODE_HITRETURN && typed_char == 0))
+	return FALSE;
+    entered = TRUE;
+
+    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 = MODE_ASKMORE;
+    setmouse();
+    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, MODE_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
+
+	toscroll = 0;
+	switch (c)
+	{
+	case BS:		// scroll one line back
+	case K_BS:
+	case 'k':
+	case K_UP:
+	    toscroll = -1;
+	    break;
+
+	case CAR:		// one extra line
+	case NL:
+	case 'j':
+	case K_DOWN:
+	    toscroll = 1;
+	    break;
+
+	case 'u':		// Up half a page
+	    toscroll = -(Rows / 2);
+	    break;
+
+	case 'd':		// Down half a page
+	    toscroll = Rows / 2;
+	    break;
+
+	case 'b':		// one page back
+	case K_PAGEUP:
+	    toscroll = -(Rows - 1);
+	    break;
+
+	case ' ':		// one extra page
+	case 'f':
+	case K_PAGEDOWN:
+	case K_LEFTMOUSE:
+	    toscroll = Rows - 1;
+	    break;
+
+	case 'g':		// all the way back to the start
+	    toscroll = -999999;
+	    break;
+
+	case 'G':		// all the way to the end
+	    toscroll = 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(':');
+#ifdef FEAT_TERMINAL
+		skip_term_loop = TRUE;
+#endif
+		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 (toscroll != 0)
+	{
+	    if (toscroll < 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 > toscroll; --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 (toscroll == -1 && screen_ins_lines(0, 0, 1,
+						     (int)Rows, 0, NULL) == OK)
+		    {
+			// display line at top
+			(void)disp_sb_line(0, mp, FALSE);
+		    }
+		    else
+		    {
+			int did_clear = screenclear();
+
+			// redisplay all lines
+			for (i = 0; mp != NULL && i < Rows - 1; ++i)
+			{
+			    mp = disp_sb_line(i, mp, !did_clear);
+			    ++msg_scrolled;
+			}
+		    }
+		    toscroll = 0;
+		}
+	    }
+	    else
+	    {
+		// First display any text that we scrolled back.
+		while (toscroll > 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, FALSE);
+		    --toscroll;
+		}
+	    }
+
+	    if (toscroll <= 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 = toscroll;
+	}
+
+	break;
+    }
+
+    // clear the --more-- message
+    screen_fill((int)Rows - 1, (int)Rows, 0, (int)Columns, ' ', ' ', 0);
+    State = oldState;
+    setmouse();
+    if (quit_more)
+    {
+	msg_row = Rows - 1;
+	msg_col = 0;
+    }
+#ifdef FEAT_RIGHTLEFT
+    else if (cmdmsg_rl)
+	msg_col = Columns - 1;
+#endif
+
+    entered = FALSE;
+#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
+
+#if defined(MSWIN) && (!defined(FEAT_GUI_MSWIN) || defined(VIMDLL))
+    static void
+mch_errmsg_c(char *str)
+{
+    int	    len = (int)STRLEN(str);
+    DWORD   nwrite = 0;
+    DWORD   mode = 0;
+    HANDLE  h = GetStdHandle(STD_ERROR_HANDLE);
+
+    if (GetConsoleMode(h, &mode) && enc_codepage >= 0
+	    && (int)GetConsoleCP() != enc_codepage)
+    {
+	WCHAR	*w = enc_to_utf16((char_u *)str, &len);
+
+	WriteConsoleW(h, w, len, &nwrite, NULL);
+	vim_free(w);
+    }
+    else
+    {
+	fprintf(stderr, "%s", str);
+    }
+}
+#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(char *str)
+{
+#if !defined(MSWIN) || defined(FEAT_GUI_MSWIN)
+    int		len;
+#endif
+
+#if (defined(UNIX) || defined(FEAT_GUI)) && !defined(ALWAYS_USE_GUI) && !defined(VIMDLL)
+    // 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
+	    (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
+
+#if defined(MSWIN) && (!defined(FEAT_GUI_MSWIN) || defined(VIMDLL))
+# ifdef VIMDLL
+    if (!(gui.in_use || gui.starting))
+# endif
+    {
+	mch_errmsg_c(str);
+	return;
+    }
+#endif
+
+#if !defined(MSWIN) || defined(FEAT_GUI_MSWIN)
+    // 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;
+    }
+#endif
+}
+
+#if defined(MSWIN) && (!defined(FEAT_GUI_MSWIN) || defined(VIMDLL))
+    static void
+mch_msg_c(char *str)
+{
+    int	    len = (int)STRLEN(str);
+    DWORD   nwrite = 0;
+    DWORD   mode;
+    HANDLE  h = GetStdHandle(STD_OUTPUT_HANDLE);
+
+
+    if (GetConsoleMode(h, &mode) && enc_codepage >= 0
+	    && (int)GetConsoleCP() != enc_codepage)
+    {
+	WCHAR	*w = enc_to_utf16((char_u *)str, &len);
+
+	WriteConsoleW(h, w, len, &nwrite, NULL);
+	vim_free(w);
+    }
+    else
+    {
+	printf("%s", str);
+    }
+}
+#endif
+
+/*
+ * 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(char *str)
+{
+#if (defined(UNIX) || defined(FEAT_GUI)) && !defined(ALWAYS_USE_GUI) && !defined(VIMDLL)
+    // 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
+	    (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
+
+#if defined(MSWIN) && (!defined(FEAT_GUI_MSWIN) || defined(VIMDLL))
+# ifdef VIMDLL
+    if (!(gui.in_use || gui.starting))
+# endif
+    {
+	mch_msg_c(str);
+	return;
+    }
+#endif
+#if !defined(MSWIN) || defined(FEAT_GUI_MSWIN)
+    mch_errmsg(str);
+#endif
+}
+#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(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;
+	}
+    }
+}
+
+    static void
+msg_moremsg(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: MODE_ASKMORE, MODE_EXTERNCMD,
+ * MODE_CONFIRM or exmode_active.
+ */
+    void
+repeat_message(void)
+{
+    if (State == MODE_ASKMORE)
+    {
+	msg_moremsg(TRUE);	// display --more-- message again
+	msg_row = Rows - 1;
+    }
+#ifdef FEAT_CON_DIALOG
+    else if (State == MODE_CONFIRM)
+    {
+	display_confirm_msg();	// display ":confirm" message again
+	msg_row = Rows - 1;
+    }
+#endif
+    else if (State == MODE_EXTERNCMD)
+    {
+	windgoto(msg_row, msg_col); // put cursor back
+    }
+    else if (State == MODE_HITRETURN || State == MODE_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(void)
+{
+    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(void)
+{
+    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(void)
+{
+#ifdef HAS_MESSAGE_WINDOW
+    if (in_echowindow)
+	return;  // messages go into a popup
+#endif
+    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(void)
+{
+    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(void)
+{
+    /*
+     * 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 & MODE_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(void)
+{
+    if (msg_row == Rows - 1 && msg_col >= sc_col
+#ifdef HAS_MESSAGE_WINDOW
+		&& !in_echowindow
+#endif
+	    )
+    {
+	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(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 prepare for writing in that file.
+    if (*p_vfile != NUL && verbose_fd == NULL)
+	verbose_open();
+
+    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_execute)
+		    execute_redir_str((char_u *)" ", -1);
+		else if (redir_reg)
+		    write_reg_contents(redir_reg, (char_u *)" ", -1, TRUE);
+		else if (redir_vname)
+		    var_redir_str((char_u *)" ", -1);
+		else
+#endif
+		    if (redir_fd != NULL)
+		    fputs(" ", redir_fd);
+		if (verbose_fd != NULL)
+		    fputs(" ", verbose_fd);
+		++cur_col;
+	    }
+	}
+
+#ifdef FEAT_EVAL
+	if (redir_execute)
+	    execute_redir_str(s, maxlen);
+	else if (redir_reg)
+	    write_reg_contents(redir_reg, s, maxlen, TRUE);
+	else if (redir_vname)
+	    var_redir_str(s, maxlen);
+#endif
+
+	// Write and adjust the current column.
+	while (*s != NUL && (maxlen < 0 || (int)(s - str) < maxlen))
+	{
+#ifdef FEAT_EVAL
+	    if (!redir_reg && !redir_vname && !redir_execute)
+#endif
+		if (redir_fd != NULL)
+		    putc(*s, redir_fd);
+	    if (verbose_fd != NULL)
+		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;
+	}
+
+	if (msg_silent != 0)	// should update msg_col
+	    msg_col = cur_col;
+    }
+}
+
+    int
+redirecting(void)
+{
+    return redir_fd != NULL || *p_vfile != NUL
+#ifdef FEAT_EVAL
+			  || redir_reg || redir_vname || redir_execute
+#endif
+				       ;
+}
+
+/*
+ * Before giving verbose message.
+ * Must always be called paired with verbose_leave()!
+ */
+    void
+verbose_enter(void)
+{
+    if (*p_vfile != NUL)
+	++msg_silent;
+}
+
+/*
+ * After giving verbose message.
+ * Must always be called paired with verbose_enter()!
+ */
+    void
+verbose_leave(void)
+{
+    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(void)
+{
+    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(void)
+{
+    if (*p_vfile != NUL)
+    {
+	if (--msg_silent < 0)
+	    msg_silent = 0;
+    }
+    else
+	cmdline_row = msg_row;
+}
+
+/*
+ * Called when 'verbosefile' is set: stop writing to the file.
+ */
+    void
+verbose_stop(void)
+{
+    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(void)
+{
+    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)
+	{
+	    semsg(_(e_cant_open_file_str), p_vfile);
+	    return FAIL;
+	}
+    }
+    return OK;
+}
+
+/*
+ * Give a warning message (for searching).
+ * Use 'w' highlighting and may repeat the message after redrawing
+ */
+    void
+give_warning(char_u *message, int hl)
+{
+    give_warning_with_source(message, hl, FALSE);
+}
+
+    void
+give_warning_with_source(char_u *message, int hl, int with_source)
+{
+    // 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_CLEAR(keep_msg);
+    if (hl)
+	keep_msg_attr = HL_ATTR(HLF_W);
+    else
+	keep_msg_attr = 0;
+
+    if (with_source)
+    {
+	// Do what msg() does, but with a column offset if the warning should
+	// be after the mode message.
+	msg_start();
+	msg_source(HL_ATTR(HLF_W));
+	msg_puts(" ");
+	msg_puts_attr((char *)message, HL_ATTR(HLF_W) | MSG_HIST);
+	msg_clr_eos();
+	(void)msg_end();
+    }
+    else if (msg_attr((char *)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;
+}
+
+#if defined(FEAT_EVAL) || defined(PROTO)
+    void
+give_warning2(char_u *message, char_u *a1, int hl)
+{
+    if (IObuff == NULL)
+    {
+	// Very early in initialisation and already something wrong, just give
+	// the raw message so the user at least gets a hint.
+	give_warning(message, hl);
+    }
+    else
+    {
+	vim_snprintf((char *)IObuff, IOSIZE, (char *)message, a1);
+	give_warning(IObuff, hl);
+    }
+}
+#endif
+
+/*
+ * Advance msg cursor to column "col".
+ */
+    void
+msg_advance(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.
+ *
+ * Returns 0 if cancelled, otherwise the nth button (1-indexed).
+ */
+    int
+do_dialog(
+    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		ex_cmd)	    // when TRUE pressing : accepts default and starts
+			    // Ex command
+{
+    int		oldState;
+    int		retval = 0;
+    char_u	*hotkeys;
+    int		c;
+    int		i;
+    tmode_T	save_tmode;
+
+#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)
+    {
+	// --gui-dialog-file: write text to a file
+	if (gui_dialog_log(title, message))
+	    c = dfltbutton;
+	else
+	    c = gui_mch_dialog(type, title, message, buttons, dfltbutton,
+							   textfield, ex_cmd);
+	// 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 = MODE_CONFIRM;
+    setmouse();
+
+    // Ensure raw mode here.
+    save_tmode = cur_tmode;
+    settmode(TMODE_RAW);
+
+    /*
+     * 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;
+		if (c == ':' && ex_cmd)
+		{
+		    retval = dfltbutton;
+		    ins_char_typebuf(':', 0);
+		    break;
+		}
+
+		// Make the character lowercase, as chars in "hotkeys" are.
+		c = MB_TOLOWER(c);
+		retval = 1;
+		for (i = 0; hotkeys[i]; ++i)
+		{
+		    if (has_mbyte)
+		    {
+			if ((*mb_ptr2char)(hotkeys + i) == c)
+			    break;
+			i += (*mb_ptr2len)(hotkeys + i) - 1;
+		    }
+		    else
+			if (hotkeys[i] == c)
+			    break;
+		    ++retval;
+		}
+		if (hotkeys[i])
+		    break;
+		// No hotkey match, so keep waiting
+		continue;
+	    }
+	    break;
+	}
+
+	vim_free(hotkeys);
+    }
+
+    settmode(save_tmode);
+    State = oldState;
+    setmouse();
+    --no_wait_return;
+    msg_end_prompt();
+
+    return retval;
+}
+
+/*
+ * 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(
+    char_u	*from,
+    char_u	*to,
+    int		lowercase)	// make character lower case
+{
+    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
+    {
+	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(
+    char_u	*message,
+    char_u	*buttons,
+    int		dfltbutton)
+{
+    int		len = 0;
+#define HOTK_LEN (has_mbyte ? MB_MAXBYTES : 1)
+    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
+		    if (has_mbyte)
+			hotkp += STRLEN(hotkp);
+		    else
+			++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.
+ */
+    static void
+display_confirm_msg(void)
+{
+    // avoid that 'q' at the more prompt truncates the message here
+    ++confirm_msg_used;
+    if (confirm_msg != NULL)
+	msg_puts_attr((char *)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(
+    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, FALSE) == 1)
+	return VIM_YES;
+    return VIM_NO;
+}
+
+    int
+vim_dialog_yesnocancel(
+    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, FALSE))
+    {
+	case 1: return VIM_YES;
+	case 2: return VIM_NO;
+    }
+    return VIM_CANCEL;
+}
+
+    int
+vim_dialog_yesnoallcancel(
+    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, FALSE))
+    {
+	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