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, 5610 insertions, 0 deletions

diff --git a/src/ex_cmds.c b/src/ex_cmds.c
new file mode 100644
index 0000000..0d83980
--- /dev/null
+++ b/src/ex_cmds.c
@@ -0,0 +1,5610 @@
+/* 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.
+ */
+
+/*
+ * ex_cmds.c: some functions for command line commands
+ */
+
+#include "vim.h"
+#include "version.h"
+
+#include <float.h>
+
+static int linelen(int *has_tab);
+static void do_filter(linenr_T line1, linenr_T line2, exarg_T *eap, char_u *cmd, int do_in, int do_out);
+static int not_writing(void);
+static int check_readonly(int *forceit, buf_T *buf);
+static void delbuf_msg(char_u *name);
+
+/*
+ * ":ascii" and "ga".
+ */
+    void
+do_ascii(exarg_T *eap UNUSED)
+{
+    int		c;
+    int		cval;
+    char	buf1[20];
+    char	buf2[20];
+    char_u	buf3[7];
+#ifdef FEAT_DIGRAPHS
+    char_u      *dig;
+#endif
+    int		cc[MAX_MCO];
+    int		ci = 0;
+    int		len;
+
+    if (enc_utf8)
+	c = utfc_ptr2char(ml_get_cursor(), cc);
+    else
+	c = gchar_cursor();
+    if (c == NUL)
+    {
+	msg("NUL");
+	return;
+    }
+
+    IObuff[0] = NUL;
+    if (!has_mbyte || (enc_dbcs != 0 && c < 0x100) || c < 0x80)
+    {
+	if (c == NL)	    // NUL is stored as NL
+	    c = NUL;
+	if (c == CAR && get_fileformat(curbuf) == EOL_MAC)
+	    cval = NL;	    // NL is stored as CR
+	else
+	    cval = c;
+	if (vim_isprintc_strict(c) && (c < ' ' || c > '~'))
+	{
+	    transchar_nonprint(curbuf, buf3, c);
+	    vim_snprintf(buf1, sizeof(buf1), "  <%s>", (char *)buf3);
+	}
+	else
+	    buf1[0] = NUL;
+	if (c >= 0x80)
+	    vim_snprintf(buf2, sizeof(buf2), "  <M-%s>",
+						 (char *)transchar(c & 0x7f));
+	else
+	    buf2[0] = NUL;
+#ifdef FEAT_DIGRAPHS
+	dig = get_digraph_for_char(cval);
+	if (dig != NULL)
+	    vim_snprintf((char *)IObuff, IOSIZE,
+		_("<%s>%s%s  %d,  Hex %02x,  Oct %03o, Digr %s"),
+			      transchar(c), buf1, buf2, cval, cval, cval, dig);
+	else
+#endif
+	    vim_snprintf((char *)IObuff, IOSIZE,
+		_("<%s>%s%s  %d,  Hex %02x,  Octal %03o"),
+				  transchar(c), buf1, buf2, cval, cval, cval);
+	if (enc_utf8)
+	    c = cc[ci++];
+	else
+	    c = 0;
+    }
+
+    // Repeat for combining characters.
+    while (has_mbyte && (c >= 0x100 || (enc_utf8 && c >= 0x80)))
+    {
+	len = (int)STRLEN(IObuff);
+	// This assumes every multi-byte char is printable...
+	if (len > 0)
+	    IObuff[len++] = ' ';
+	IObuff[len++] = '<';
+	if (enc_utf8 && utf_iscomposing(c)
+#ifdef USE_GUI
+		&& !gui.in_use
+#endif
+		)
+	    IObuff[len++] = ' '; // draw composing char on top of a space
+	len += (*mb_char2bytes)(c, IObuff + len);
+#ifdef FEAT_DIGRAPHS
+	dig = get_digraph_for_char(c);
+	if (dig != NULL)
+	    vim_snprintf((char *)IObuff + len, IOSIZE - len,
+			c < 0x10000 ? _("> %d, Hex %04x, Oct %o, Digr %s")
+				    : _("> %d, Hex %08x, Oct %o, Digr %s"),
+					c, c, c, dig);
+	else
+#endif
+	    vim_snprintf((char *)IObuff + len, IOSIZE - len,
+			 c < 0x10000 ? _("> %d, Hex %04x, Octal %o")
+				     : _("> %d, Hex %08x, Octal %o"),
+				     c, c, c);
+	if (ci == MAX_MCO)
+	    break;
+	if (enc_utf8)
+	    c = cc[ci++];
+	else
+	    c = 0;
+    }
+
+    msg((char *)IObuff);
+}
+
+/*
+ * ":left", ":center" and ":right": align text.
+ */
+    void
+ex_align(exarg_T *eap)
+{
+    pos_T	save_curpos;
+    int		len;
+    int		indent = 0;
+    int		new_indent;
+    int		has_tab;
+    int		width;
+
+#ifdef FEAT_RIGHTLEFT
+    if (curwin->w_p_rl)
+    {
+	// switch left and right aligning
+	if (eap->cmdidx == CMD_right)
+	    eap->cmdidx = CMD_left;
+	else if (eap->cmdidx == CMD_left)
+	    eap->cmdidx = CMD_right;
+    }
+#endif
+
+    width = atoi((char *)eap->arg);
+    save_curpos = curwin->w_cursor;
+    if (eap->cmdidx == CMD_left)    // width is used for new indent
+    {
+	if (width >= 0)
+	    indent = width;
+    }
+    else
+    {
+	/*
+	 * if 'textwidth' set, use it
+	 * else if 'wrapmargin' set, use it
+	 * if invalid value, use 80
+	 */
+	if (width <= 0)
+	    width = curbuf->b_p_tw;
+	if (width == 0 && curbuf->b_p_wm > 0)
+	    width = curwin->w_width - curbuf->b_p_wm;
+	if (width <= 0)
+	    width = 80;
+    }
+
+    if (u_save((linenr_T)(eap->line1 - 1), (linenr_T)(eap->line2 + 1)) == FAIL)
+	return;
+
+    for (curwin->w_cursor.lnum = eap->line1;
+		 curwin->w_cursor.lnum <= eap->line2; ++curwin->w_cursor.lnum)
+    {
+	if (eap->cmdidx == CMD_left)		// left align
+	    new_indent = indent;
+	else
+	{
+	    has_tab = FALSE;	// avoid uninit warnings
+	    len = linelen(eap->cmdidx == CMD_right ? &has_tab
+						   : NULL) - get_indent();
+
+	    if (len <= 0)			// skip blank lines
+		continue;
+
+	    if (eap->cmdidx == CMD_center)
+		new_indent = (width - len) / 2;
+	    else
+	    {
+		new_indent = width - len;	// right align
+
+		/*
+		 * Make sure that embedded TABs don't make the text go too far
+		 * to the right.
+		 */
+		if (has_tab)
+		    while (new_indent > 0)
+		    {
+			(void)set_indent(new_indent, 0);
+			if (linelen(NULL) <= width)
+			{
+			    /*
+			     * Now try to move the line as much as possible to
+			     * the right.  Stop when it moves too far.
+			     */
+			    do
+				(void)set_indent(++new_indent, 0);
+			    while (linelen(NULL) <= width);
+			    --new_indent;
+			    break;
+			}
+			--new_indent;
+		    }
+	    }
+	}
+	if (new_indent < 0)
+	    new_indent = 0;
+	(void)set_indent(new_indent, 0);		// set indent
+    }
+    changed_lines(eap->line1, 0, eap->line2 + 1, 0L);
+    curwin->w_cursor = save_curpos;
+    beginline(BL_WHITE | BL_FIX);
+}
+
+/*
+ * Get the length of the current line, excluding trailing white space.
+ */
+    static int
+linelen(int *has_tab)
+{
+    char_u  *line;
+    char_u  *first;
+    char_u  *last;
+    int	    save;
+    int	    len;
+
+    // Get the line.  If it's empty bail out early (could be the empty string
+    // for an unloaded buffer).
+    line = ml_get_curline();
+    if (*line == NUL)
+	return 0;
+
+    // find the first non-blank character
+    first = skipwhite(line);
+
+    // find the character after the last non-blank character
+    for (last = first + STRLEN(first);
+				last > first && VIM_ISWHITE(last[-1]); --last)
+	;
+    save = *last;
+    *last = NUL;
+    len = linetabsize_str(line);	// get line length on screen
+    if (has_tab != NULL)		// check for embedded TAB
+	*has_tab = (vim_strchr(first, TAB) != NULL);
+    *last = save;
+
+    return len;
+}
+
+// Buffer for two lines used during sorting.  They are allocated to
+// contain the longest line being sorted.
+static char_u	*sortbuf1;
+static char_u	*sortbuf2;
+
+static int	sort_lc;	// sort using locale
+static int	sort_ic;	// ignore case
+static int	sort_nr;	// sort on number
+static int	sort_rx;	// sort on regex instead of skipping it
+static int	sort_flt;	// sort on floating number
+
+static int	sort_abort;	// flag to indicate if sorting has been interrupted
+
+// Struct to store info to be sorted.
+typedef struct
+{
+    linenr_T	lnum;			// line number
+    union {
+	struct
+	{
+	    varnumber_T	start_col_nr;	// starting column number
+	    varnumber_T	end_col_nr;	// ending column number
+	} line;
+	struct
+	{
+	    varnumber_T	value;		// value if sorting by integer
+	    int is_number;		// TRUE when line contains a number
+	} num;
+	float_T value_flt;		// value if sorting by float
+    } st_u;
+} sorti_T;
+
+    static int
+string_compare(const void *s1, const void *s2)
+{
+    if (sort_lc)
+	return strcoll((char *)s1, (char *)s2);
+    return sort_ic ? STRICMP(s1, s2) : STRCMP(s1, s2);
+}
+
+    static int
+sort_compare(const void *s1, const void *s2)
+{
+    sorti_T	l1 = *(sorti_T *)s1;
+    sorti_T	l2 = *(sorti_T *)s2;
+    int		result = 0;
+
+    // If the user interrupts, there's no way to stop qsort() immediately, but
+    // if we return 0 every time, qsort will assume it's done sorting and
+    // exit.
+    if (sort_abort)
+	return 0;
+    fast_breakcheck();
+    if (got_int)
+	sort_abort = TRUE;
+
+    if (sort_nr)
+    {
+	if (l1.st_u.num.is_number != l2.st_u.num.is_number)
+	    result = l1.st_u.num.is_number - l2.st_u.num.is_number;
+	else
+	    result = l1.st_u.num.value == l2.st_u.num.value ? 0
+			     : l1.st_u.num.value > l2.st_u.num.value ? 1 : -1;
+    }
+    else if (sort_flt)
+	result = l1.st_u.value_flt == l2.st_u.value_flt ? 0
+			     : l1.st_u.value_flt > l2.st_u.value_flt ? 1 : -1;
+    else
+    {
+	// We need to copy one line into "sortbuf1", because there is no
+	// guarantee that the first pointer becomes invalid when obtaining the
+	// second one.
+	STRNCPY(sortbuf1, ml_get(l1.lnum) + l1.st_u.line.start_col_nr,
+		     l1.st_u.line.end_col_nr - l1.st_u.line.start_col_nr + 1);
+	sortbuf1[l1.st_u.line.end_col_nr - l1.st_u.line.start_col_nr] = 0;
+	STRNCPY(sortbuf2, ml_get(l2.lnum) + l2.st_u.line.start_col_nr,
+		     l2.st_u.line.end_col_nr - l2.st_u.line.start_col_nr + 1);
+	sortbuf2[l2.st_u.line.end_col_nr - l2.st_u.line.start_col_nr] = 0;
+
+	result = string_compare(sortbuf1, sortbuf2);
+    }
+
+    // If two lines have the same value, preserve the original line order.
+    if (result == 0)
+	return (int)(l1.lnum - l2.lnum);
+    return result;
+}
+
+/*
+ * ":sort".
+ */
+    void
+ex_sort(exarg_T *eap)
+{
+    regmatch_T	regmatch;
+    int		len;
+    linenr_T	lnum;
+    long	maxlen = 0;
+    sorti_T	*nrs;
+    size_t	count = (size_t)(eap->line2 - eap->line1 + 1);
+    size_t	i;
+    char_u	*p;
+    char_u	*s;
+    char_u	*s2;
+    char_u	c;			// temporary character storage
+    int		unique = FALSE;
+    long	deleted;
+    colnr_T	start_col;
+    colnr_T	end_col;
+    int		sort_what = 0;
+    int		format_found = 0;
+    int		change_occurred = FALSE; // Buffer contents changed.
+
+    // Sorting one line is really quick!
+    if (count <= 1)
+	return;
+
+    if (u_save((linenr_T)(eap->line1 - 1), (linenr_T)(eap->line2 + 1)) == FAIL)
+	return;
+    sortbuf1 = NULL;
+    sortbuf2 = NULL;
+    regmatch.regprog = NULL;
+    nrs = ALLOC_MULT(sorti_T, count);
+    if (nrs == NULL)
+	goto sortend;
+
+    sort_abort = sort_ic = sort_lc = sort_rx = sort_nr = 0;
+    sort_flt = 0;
+
+    for (p = eap->arg; *p != NUL; ++p)
+    {
+	if (VIM_ISWHITE(*p))
+	    ;
+	else if (*p == 'i')
+	    sort_ic = TRUE;
+	else if (*p == 'l')
+	    sort_lc = TRUE;
+	else if (*p == 'r')
+	    sort_rx = TRUE;
+	else if (*p == 'n')
+	{
+	    sort_nr = 1;
+	    ++format_found;
+	}
+	else if (*p == 'f')
+	{
+	    sort_flt = 1;
+	    ++format_found;
+	}
+	else if (*p == 'b')
+	{
+	    sort_what = STR2NR_BIN + STR2NR_FORCE;
+	    ++format_found;
+	}
+	else if (*p == 'o')
+	{
+	    sort_what = STR2NR_OCT + STR2NR_FORCE;
+	    ++format_found;
+	}
+	else if (*p == 'x')
+	{
+	    sort_what = STR2NR_HEX + STR2NR_FORCE;
+	    ++format_found;
+	}
+	else if (*p == 'u')
+	    unique = TRUE;
+	else if (*p == '"')	// comment start
+	    break;
+	else if (eap->nextcmd == NULL && check_nextcmd(p) != NULL)
+	{
+	    eap->nextcmd = check_nextcmd(p);
+	    break;
+	}
+	else if (!ASCII_ISALPHA(*p) && regmatch.regprog == NULL)
+	{
+	    s = skip_regexp_err(p + 1, *p, TRUE);
+	    if (s == NULL)
+		goto sortend;
+	    *s = NUL;
+	    // Use last search pattern if sort pattern is empty.
+	    if (s == p + 1)
+	    {
+		if (last_search_pat() == NULL)
+		{
+		    emsg(_(e_no_previous_regular_expression));
+		    goto sortend;
+		}
+		regmatch.regprog = vim_regcomp(last_search_pat(), RE_MAGIC);
+	    }
+	    else
+		regmatch.regprog = vim_regcomp(p + 1, RE_MAGIC);
+	    if (regmatch.regprog == NULL)
+		goto sortend;
+	    p = s;		// continue after the regexp
+	    regmatch.rm_ic = p_ic;
+	}
+	else
+	{
+	    semsg(_(e_invalid_argument_str), p);
+	    goto sortend;
+	}
+    }
+
+    // Can only have one of 'n', 'b', 'o' and 'x'.
+    if (format_found > 1)
+    {
+	emsg(_(e_invalid_argument));
+	goto sortend;
+    }
+
+    // From here on "sort_nr" is used as a flag for any integer number
+    // sorting.
+    sort_nr += sort_what;
+
+    /*
+     * Make an array with all line numbers.  This avoids having to copy all
+     * the lines into allocated memory.
+     * When sorting on strings "start_col_nr" is the offset in the line, for
+     * numbers sorting it's the number to sort on.  This means the pattern
+     * matching and number conversion only has to be done once per line.
+     * Also get the longest line length for allocating "sortbuf".
+     */
+    for (lnum = eap->line1; lnum <= eap->line2; ++lnum)
+    {
+	s = ml_get(lnum);
+	len = (int)STRLEN(s);
+	if (maxlen < len)
+	    maxlen = len;
+
+	start_col = 0;
+	end_col = len;
+	if (regmatch.regprog != NULL && vim_regexec(&regmatch, s, 0))
+	{
+	    if (sort_rx)
+	    {
+		start_col = (colnr_T)(regmatch.startp[0] - s);
+		end_col = (colnr_T)(regmatch.endp[0] - s);
+	    }
+	    else
+		start_col = (colnr_T)(regmatch.endp[0] - s);
+	}
+	else
+	    if (regmatch.regprog != NULL)
+		end_col = 0;
+
+	if (sort_nr || sort_flt)
+	{
+	    // Make sure vim_str2nr doesn't read any digits past the end
+	    // of the match, by temporarily terminating the string there
+	    s2 = s + end_col;
+	    c = *s2;
+	    *s2 = NUL;
+	    // Sorting on number: Store the number itself.
+	    p = s + start_col;
+	    if (sort_nr)
+	    {
+		if (sort_what & STR2NR_HEX)
+		    s = skiptohex(p);
+		else if (sort_what & STR2NR_BIN)
+		    s = skiptobin(p);
+		else
+		    s = skiptodigit(p);
+		if (s > p && s[-1] == '-')
+		    --s;  // include preceding negative sign
+		if (*s == NUL)
+		{
+		    // line without number should sort before any number
+		    nrs[lnum - eap->line1].st_u.num.is_number = FALSE;
+		    nrs[lnum - eap->line1].st_u.num.value = 0;
+		}
+		else
+		{
+		    nrs[lnum - eap->line1].st_u.num.is_number = TRUE;
+		    vim_str2nr(s, NULL, NULL, sort_what,
+			&nrs[lnum - eap->line1].st_u.num.value,
+			NULL, 0, FALSE);
+		}
+	    }
+	    else
+	    {
+		s = skipwhite(p);
+		if (*s == '+')
+		    s = skipwhite(s + 1);
+
+		if (*s == NUL)
+		    // empty line should sort before any number
+		    nrs[lnum - eap->line1].st_u.value_flt = -DBL_MAX;
+		else
+		    nrs[lnum - eap->line1].st_u.value_flt =
+						      strtod((char *)s, NULL);
+	    }
+	    *s2 = c;
+	}
+	else
+	{
+	    // Store the column to sort at.
+	    nrs[lnum - eap->line1].st_u.line.start_col_nr = start_col;
+	    nrs[lnum - eap->line1].st_u.line.end_col_nr = end_col;
+	}
+
+	nrs[lnum - eap->line1].lnum = lnum;
+
+	if (regmatch.regprog != NULL)
+	    fast_breakcheck();
+	if (got_int)
+	    goto sortend;
+    }
+
+    // Allocate a buffer that can hold the longest line.
+    sortbuf1 = alloc(maxlen + 1);
+    if (sortbuf1 == NULL)
+	goto sortend;
+    sortbuf2 = alloc(maxlen + 1);
+    if (sortbuf2 == NULL)
+	goto sortend;
+
+    // Sort the array of line numbers.  Note: can't be interrupted!
+    qsort((void *)nrs, count, sizeof(sorti_T), sort_compare);
+
+    if (sort_abort)
+	goto sortend;
+
+    // Insert the lines in the sorted order below the last one.
+    lnum = eap->line2;
+    for (i = 0; i < count; ++i)
+    {
+	linenr_T get_lnum = nrs[eap->forceit ? count - i - 1 : i].lnum;
+
+	// If the original line number of the line being placed is not the same
+	// as "lnum" (accounting for offset), we know that the buffer changed.
+	if (get_lnum + ((linenr_T)count - 1) != lnum)
+	    change_occurred = TRUE;
+
+	s = ml_get(get_lnum);
+	if (!unique || i == 0 || string_compare(s, sortbuf1) != 0)
+	{
+	    // Copy the line into a buffer, it may become invalid in
+	    // ml_append(). And it's needed for "unique".
+	    STRCPY(sortbuf1, s);
+	    if (ml_append(lnum++, sortbuf1, (colnr_T)0, FALSE) == FAIL)
+		break;
+	}
+	fast_breakcheck();
+	if (got_int)
+	    goto sortend;
+    }
+
+    // delete the original lines if appending worked
+    if (i == count)
+	for (i = 0; i < count; ++i)
+	    ml_delete(eap->line1);
+    else
+	count = 0;
+
+    // Adjust marks for deleted (or added) lines and prepare for displaying.
+    deleted = (long)(count - (lnum - eap->line2));
+    if (deleted > 0)
+    {
+	mark_adjust(eap->line2 - deleted, eap->line2, (long)MAXLNUM, -deleted);
+	msgmore(-deleted);
+    }
+    else if (deleted < 0)
+	mark_adjust(eap->line2, MAXLNUM, -deleted, 0L);
+
+    if (change_occurred || deleted != 0)
+	changed_lines(eap->line1, 0, eap->line2 + 1, -deleted);
+
+    curwin->w_cursor.lnum = eap->line1;
+    beginline(BL_WHITE | BL_FIX);
+
+sortend:
+    vim_free(nrs);
+    vim_free(sortbuf1);
+    vim_free(sortbuf2);
+    vim_regfree(regmatch.regprog);
+    if (got_int)
+	emsg(_(e_interrupted));
+}
+
+/*
+ * :move command - move lines line1-line2 to line dest
+ *
+ * return FAIL for failure, OK otherwise
+ */
+    int
+do_move(linenr_T line1, linenr_T line2, linenr_T dest)
+{
+    char_u	*str;
+    linenr_T	l;
+    linenr_T	extra;	    // Num lines added before line1
+    linenr_T	num_lines;  // Num lines moved
+    linenr_T	last_line;  // Last line in file after adding new text
+#ifdef FEAT_FOLDING
+    win_T	*win;
+    tabpage_T	*tp;
+#endif
+
+    if (dest >= line1 && dest < line2)
+    {
+	emsg(_(e_cannot_move_range_of_lines_into_itself));
+	return FAIL;
+    }
+
+    // Do nothing if we are not actually moving any lines.  This will prevent
+    // the 'modified' flag from being set without cause.
+    if (dest == line1 - 1 || dest == line2)
+    {
+	// Move the cursor as if lines were moved (see below) to be backwards
+	// compatible.
+	if (dest >= line1)
+	    curwin->w_cursor.lnum = dest;
+	else
+	    curwin->w_cursor.lnum = dest + (line2 - line1) + 1;
+
+	return OK;
+    }
+
+    num_lines = line2 - line1 + 1;
+
+    /*
+     * First we copy the old text to its new location -- webb
+     * Also copy the flag that ":global" command uses.
+     */
+    if (u_save(dest, dest + 1) == FAIL)
+	return FAIL;
+    for (extra = 0, l = line1; l <= line2; l++)
+    {
+	str = vim_strsave(ml_get(l + extra));
+	if (str != NULL)
+	{
+	    ml_append(dest + l - line1, str, (colnr_T)0, FALSE);
+	    vim_free(str);
+	    if (dest < line1)
+		extra++;
+	}
+    }
+
+    /*
+     * Now we must be careful adjusting our marks so that we don't overlap our
+     * mark_adjust() calls.
+     *
+     * We adjust the marks within the old text so that they refer to the
+     * last lines of the file (temporarily), because we know no other marks
+     * will be set there since these line numbers did not exist until we added
+     * our new lines.
+     *
+     * Then we adjust the marks on lines between the old and new text positions
+     * (either forwards or backwards).
+     *
+     * And Finally we adjust the marks we put at the end of the file back to
+     * their final destination at the new text position -- webb
+     */
+    last_line = curbuf->b_ml.ml_line_count;
+    mark_adjust_nofold(line1, line2, last_line - line2, 0L);
+    if (dest >= line2)
+    {
+	mark_adjust_nofold(line2 + 1, dest, -num_lines, 0L);
+#ifdef FEAT_FOLDING
+	FOR_ALL_TAB_WINDOWS(tp, win)
+	{
+	    if (win->w_buffer == curbuf)
+		foldMoveRange(&win->w_folds, line1, line2, dest);
+	}
+#endif
+	if ((cmdmod.cmod_flags & CMOD_LOCKMARKS) == 0)
+	{
+	    curbuf->b_op_start.lnum = dest - num_lines + 1;
+	    curbuf->b_op_end.lnum = dest;
+	}
+    }
+    else
+    {
+	mark_adjust_nofold(dest + 1, line1 - 1, num_lines, 0L);
+#ifdef FEAT_FOLDING
+	FOR_ALL_TAB_WINDOWS(tp, win)
+	{
+	    if (win->w_buffer == curbuf)
+		foldMoveRange(&win->w_folds, dest + 1, line1 - 1, line2);
+	}
+#endif
+	if ((cmdmod.cmod_flags & CMOD_LOCKMARKS) == 0)
+	{
+	    curbuf->b_op_start.lnum = dest + 1;
+	    curbuf->b_op_end.lnum = dest + num_lines;
+	}
+    }
+    if ((cmdmod.cmod_flags & CMOD_LOCKMARKS) == 0)
+	curbuf->b_op_start.col = curbuf->b_op_end.col = 0;
+    mark_adjust_nofold(last_line - num_lines + 1, last_line,
+					     -(last_line - dest - extra), 0L);
+
+    /*
+     * Now we delete the original text -- webb
+     */
+    if (u_save(line1 + extra - 1, line2 + extra + 1) == FAIL)
+	return FAIL;
+
+    for (l = line1; l <= line2; l++)
+	ml_delete_flags(line1 + extra, ML_DEL_MESSAGE);
+
+    if (!global_busy && num_lines > p_report)
+	smsg(NGETTEXT("%ld line moved", "%ld lines moved", num_lines),
+			(long)num_lines);
+
+    /*
+     * Leave the cursor on the last of the moved lines.
+     */
+    if (dest >= line1)
+	curwin->w_cursor.lnum = dest;
+    else
+	curwin->w_cursor.lnum = dest + (line2 - line1) + 1;
+
+    if (line1 < dest)
+    {
+	dest += num_lines + 1;
+	last_line = curbuf->b_ml.ml_line_count;
+	if (dest > last_line + 1)
+	    dest = last_line + 1;
+	changed_lines(line1, 0, dest, 0L);
+    }
+    else
+	changed_lines(dest + 1, 0, line1 + num_lines, 0L);
+
+    return OK;
+}
+
+/*
+ * ":copy"
+ */
+    void
+ex_copy(linenr_T line1, linenr_T line2, linenr_T n)
+{
+    linenr_T	count;
+    char_u	*p;
+
+    count = line2 - line1 + 1;
+    if ((cmdmod.cmod_flags & CMOD_LOCKMARKS) == 0)
+    {
+	curbuf->b_op_start.lnum = n + 1;
+	curbuf->b_op_end.lnum = n + count;
+	curbuf->b_op_start.col = curbuf->b_op_end.col = 0;
+    }
+
+    /*
+     * there are three situations:
+     * 1. destination is above line1
+     * 2. destination is between line1 and line2
+     * 3. destination is below line2
+     *
+     * n = destination (when starting)
+     * curwin->w_cursor.lnum = destination (while copying)
+     * line1 = start of source (while copying)
+     * line2 = end of source (while copying)
+     */
+    if (u_save(n, n + 1) == FAIL)
+	return;
+
+    curwin->w_cursor.lnum = n;
+    while (line1 <= line2)
+    {
+	// need to use vim_strsave() because the line will be unlocked within
+	// ml_append()
+	p = vim_strsave(ml_get(line1));
+	if (p != NULL)
+	{
+	    ml_append(curwin->w_cursor.lnum, p, (colnr_T)0, FALSE);
+	    vim_free(p);
+	}
+	// situation 2: skip already copied lines
+	if (line1 == n)
+	    line1 = curwin->w_cursor.lnum;
+	++line1;
+	if (curwin->w_cursor.lnum < line1)
+	    ++line1;
+	if (curwin->w_cursor.lnum < line2)
+	    ++line2;
+	++curwin->w_cursor.lnum;
+    }
+
+    appended_lines_mark(n, count);
+    if (VIsual_active)
+	check_pos(curbuf, &VIsual);
+
+    msgmore((long)count);
+}
+
+static char_u	*prevcmd = NULL;	// the previous command
+
+#if defined(EXITFREE) || defined(PROTO)
+    void
+free_prev_shellcmd(void)
+{
+    vim_free(prevcmd);
+}
+#endif
+
+/*
+ * Check that "prevcmd" is not NULL.  If it is NULL then give an error message
+ * and return FALSE.
+ */
+    static int
+prevcmd_is_set(void)
+{
+    if (prevcmd == NULL)
+    {
+	emsg(_(e_no_previous_command));
+	return FALSE;
+    }
+    return TRUE;
+}
+
+/*
+ * Handle the ":!cmd" command.	Also for ":r !cmd" and ":w !cmd"
+ * Bangs in the argument are replaced with the previously entered command.
+ * Remember the argument.
+ */
+    void
+do_bang(
+    int		addr_count,
+    exarg_T	*eap,
+    int		forceit,
+    int		do_in,
+    int		do_out)
+{
+    char_u		*arg = eap->arg;	// command
+    linenr_T		line1 = eap->line1;	// start of range
+    linenr_T		line2 = eap->line2;	// end of range
+    char_u		*newcmd = NULL;		// the new command
+    int			free_newcmd = FALSE;    // need to free() newcmd
+    int			ins_prevcmd;
+    char_u		*t;
+    char_u		*p;
+    char_u		*trailarg;
+    int			len;
+    int			scroll_save = msg_scroll;
+
+    /*
+     * Disallow shell commands for "rvim".
+     * Disallow shell commands from .exrc and .vimrc in current directory for
+     * security reasons.
+     */
+    if (check_restricted() || check_secure())
+	return;
+
+    if (addr_count == 0)		// :!
+    {
+	msg_scroll = FALSE;	    // don't scroll here
+	autowrite_all();
+	msg_scroll = scroll_save;
+    }
+
+    /*
+     * Try to find an embedded bang, like in ":!<cmd> ! [args]"
+     * ":!!" is indicated by the 'forceit' variable.
+     */
+    ins_prevcmd = forceit;
+
+    // Skip leading white space to avoid a strange error with some shells.
+    trailarg = skipwhite(arg);
+    do
+    {
+	len = (int)STRLEN(trailarg) + 1;
+	if (newcmd != NULL)
+	    len += (int)STRLEN(newcmd);
+	if (ins_prevcmd)
+	{
+	    if (!prevcmd_is_set())
+	    {
+		vim_free(newcmd);
+		return;
+	    }
+	    len += (int)STRLEN(prevcmd);
+	}
+	if ((t = alloc(len)) == NULL)
+	{
+	    vim_free(newcmd);
+	    return;
+	}
+	*t = NUL;
+	if (newcmd != NULL)
+	    STRCAT(t, newcmd);
+	if (ins_prevcmd)
+	    STRCAT(t, prevcmd);
+	p = t + STRLEN(t);
+	STRCAT(t, trailarg);
+	vim_free(newcmd);
+	newcmd = t;
+
+	/*
+	 * Scan the rest of the argument for '!', which is replaced by the
+	 * previous command.  "\!" is replaced by "!" (this is vi compatible).
+	 */
+	trailarg = NULL;
+	while (*p)
+	{
+	    if (*p == '!')
+	    {
+		if (p > newcmd && p[-1] == '\\')
+		    STRMOVE(p - 1, p);
+		else
+		{
+		    trailarg = p;
+		    *trailarg++ = NUL;
+		    ins_prevcmd = TRUE;
+		    break;
+		}
+	    }
+	    ++p;
+	}
+    } while (trailarg != NULL);
+
+    // Only set "prevcmd" if there is a command to run, otherwise keep te one
+    // we have.
+    if (STRLEN(newcmd) > 0)
+    {
+	vim_free(prevcmd);
+	prevcmd = newcmd;
+    }
+    else
+	free_newcmd = TRUE;
+
+    if (bangredo)	    // put cmd in redo buffer for ! command
+    {
+	if (!prevcmd_is_set())
+	    goto theend;
+
+	// If % or # appears in the command, it must have been escaped.
+	// Reescape them, so that redoing them does not substitute them by the
+	// buffername.
+	char_u *cmd = vim_strsave_escaped(prevcmd, (char_u *)"%#");
+
+	if (cmd != NULL)
+	{
+	    AppendToRedobuffLit(cmd, -1);
+	    vim_free(cmd);
+	}
+	else
+	    AppendToRedobuffLit(prevcmd, -1);
+	AppendToRedobuff((char_u *)"\n");
+	bangredo = FALSE;
+    }
+    /*
+     * Add quotes around the command, for shells that need them.
+     */
+    if (*p_shq != NUL)
+    {
+	if (free_newcmd)
+	    vim_free(newcmd);
+	newcmd = alloc(STRLEN(prevcmd) + 2 * STRLEN(p_shq) + 1);
+	if (newcmd == NULL)
+	    return;
+	STRCPY(newcmd, p_shq);
+	STRCAT(newcmd, prevcmd);
+	STRCAT(newcmd, p_shq);
+	free_newcmd = TRUE;
+    }
+    if (addr_count == 0)		// :!
+    {
+	// echo the command
+	msg_start();
+	msg_putchar(':');
+	msg_putchar('!');
+	msg_outtrans(newcmd);
+	msg_clr_eos();
+	windgoto(msg_row, msg_col);
+
+	do_shell(newcmd, 0);
+    }
+    else				// :range!
+    {
+	// Careful: This may recursively call do_bang() again! (because of
+	// autocommands)
+	do_filter(line1, line2, eap, newcmd, do_in, do_out);
+	apply_autocmds(EVENT_SHELLFILTERPOST, NULL, NULL, FALSE, curbuf);
+    }
+
+theend:
+    if (free_newcmd)
+	vim_free(newcmd);
+}
+
+/*
+ * do_filter: filter lines through a command given by the user
+ *
+ * We mostly use temp files and the call_shell() routine here. This would
+ * normally be done using pipes on a UNIX machine, but this is more portable
+ * to non-unix machines. The call_shell() routine needs to be able
+ * to deal with redirection somehow, and should handle things like looking
+ * at the PATH env. variable, and adding reasonable extensions to the
+ * command name given by the user. All reasonable versions of call_shell()
+ * do this.
+ * Alternatively, if on Unix and redirecting input or output, but not both,
+ * and the 'shelltemp' option isn't set, use pipes.
+ * We use input redirection if do_in is TRUE.
+ * We use output redirection if do_out is TRUE.
+ */
+    static void
+do_filter(
+    linenr_T	line1,
+    linenr_T	line2,
+    exarg_T	*eap,		// for forced 'ff' and 'fenc'
+    char_u	*cmd,
+    int		do_in,
+    int		do_out)
+{
+    char_u	*itmp = NULL;
+    char_u	*otmp = NULL;
+    linenr_T	linecount;
+    linenr_T	read_linecount;
+    pos_T	cursor_save;
+    char_u	*cmd_buf;
+    buf_T	*old_curbuf = curbuf;
+    int		shell_flags = 0;
+    pos_T	orig_start = curbuf->b_op_start;
+    pos_T	orig_end = curbuf->b_op_end;
+    int		save_cmod_flags = cmdmod.cmod_flags;
+#ifdef FEAT_FILTERPIPE
+    int		stmp = p_stmp;
+#endif
+
+    if (*cmd == NUL)	    // no filter command
+	return;
+
+    // Temporarily disable lockmarks since that's needed to propagate changed
+    // regions of the buffer for foldUpdate(), linecount, etc.
+    cmdmod.cmod_flags &= ~CMOD_LOCKMARKS;
+
+    cursor_save = curwin->w_cursor;
+    linecount = line2 - line1 + 1;
+    curwin->w_cursor.lnum = line1;
+    curwin->w_cursor.col = 0;
+    changed_line_abv_curs();
+    invalidate_botline();
+
+    /*
+     * When using temp files:
+     * 1. * Form temp file names
+     * 2. * Write the lines to a temp file
+     * 3.   Run the filter command on the temp file
+     * 4. * Read the output of the command into the buffer
+     * 5. * Delete the original lines to be filtered
+     * 6. * Remove the temp files
+     *
+     * When writing the input with a pipe or when catching the output with a
+     * pipe only need to do 3.
+     */
+
+    if (do_out)
+	shell_flags |= SHELL_DOOUT;
+
+#ifdef FEAT_FILTERPIPE
+# ifdef VIMDLL
+    if (!gui.in_use && !gui.starting)
+	stmp = 1;   // Console mode doesn't support filterpipe.
+# endif
+
+    if (!do_in && do_out && !stmp)
+    {
+	// Use a pipe to fetch stdout of the command, do not use a temp file.
+	shell_flags |= SHELL_READ;
+	curwin->w_cursor.lnum = line2;
+    }
+    else if (do_in && !do_out && !stmp)
+    {
+	// Use a pipe to write stdin of the command, do not use a temp file.
+	shell_flags |= SHELL_WRITE;
+	curbuf->b_op_start.lnum = line1;
+	curbuf->b_op_end.lnum = line2;
+    }
+    else if (do_in && do_out && !stmp)
+    {
+	// Use a pipe to write stdin and fetch stdout of the command, do not
+	// use a temp file.
+	shell_flags |= SHELL_READ|SHELL_WRITE;
+	curbuf->b_op_start.lnum = line1;
+	curbuf->b_op_end.lnum = line2;
+	curwin->w_cursor.lnum = line2;
+    }
+    else
+#endif
+	if ((do_in && (itmp = vim_tempname('i', FALSE)) == NULL)
+		|| (do_out && (otmp = vim_tempname('o', FALSE)) == NULL))
+	{
+	    emsg(_(e_cant_get_temp_file_name));
+	    goto filterend;
+	}
+
+/*
+ * The writing and reading of temp files will not be shown.
+ * Vi also doesn't do this and the messages are not very informative.
+ */
+    ++no_wait_return;		// don't call wait_return() while busy
+    if (itmp != NULL && buf_write(curbuf, itmp, NULL, line1, line2, eap,
+					   FALSE, FALSE, FALSE, TRUE) == FAIL)
+    {
+	msg_putchar('\n');		// keep message from buf_write()
+	--no_wait_return;
+#if defined(FEAT_EVAL)
+	if (!aborting())
+#endif
+	    // will call wait_return()
+	    (void)semsg(_(e_cant_create_file_str), itmp);
+	goto filterend;
+    }
+    if (curbuf != old_curbuf)
+	goto filterend;
+
+    if (!do_out)
+	msg_putchar('\n');
+
+    // Create the shell command in allocated memory.
+    cmd_buf = make_filter_cmd(cmd, itmp, otmp);
+    if (cmd_buf == NULL)
+	goto filterend;
+
+    windgoto((int)Rows - 1, 0);
+    cursor_on();
+
+    /*
+     * When not redirecting the output the command can write anything to the
+     * screen. If 'shellredir' is equal to ">", screen may be messed up by
+     * stderr output of external command. Clear the screen later.
+     * If do_in is FALSE, this could be something like ":r !cat", which may
+     * also mess up the screen, clear it later.
+     */
+    if (!do_out || STRCMP(p_srr, ">") == 0 || !do_in)
+	redraw_later_clear();
+
+    if (do_out)
+    {
+	if (u_save(line2, (linenr_T)(line2 + 1)) == FAIL)
+	{
+	    vim_free(cmd_buf);
+	    goto error;
+	}
+	redraw_curbuf_later(UPD_VALID);
+    }
+    read_linecount = curbuf->b_ml.ml_line_count;
+
+    /*
+     * When call_shell() fails wait_return() is called to give the user a
+     * chance to read the error messages. Otherwise errors are ignored, so you
+     * can see the error messages from the command that appear on stdout; use
+     * 'u' to fix the text
+     * Switch to cooked mode when not redirecting stdin, avoids that something
+     * like ":r !cat" hangs.
+     * Pass on the SHELL_DOOUT flag when the output is being redirected.
+     */
+    if (call_shell(cmd_buf, SHELL_FILTER | SHELL_COOKED | shell_flags))
+    {
+	redraw_later_clear();
+	wait_return(FALSE);
+    }
+    vim_free(cmd_buf);
+
+    did_check_timestamps = FALSE;
+    need_check_timestamps = TRUE;
+
+    // When interrupting the shell command, it may still have produced some
+    // useful output.  Reset got_int here, so that readfile() won't cancel
+    // reading.
+    ui_breakcheck();
+    got_int = FALSE;
+
+    if (do_out)
+    {
+	if (otmp != NULL)
+	{
+	    if (readfile(otmp, NULL, line2, (linenr_T)0, (linenr_T)MAXLNUM,
+						    eap, READ_FILTER) != OK)
+	    {
+#if defined(FEAT_EVAL)
+		if (!aborting())
+#endif
+		{
+		    msg_putchar('\n');
+		    semsg(_(e_cant_read_file_str), otmp);
+		}
+		goto error;
+	    }
+	    if (curbuf != old_curbuf)
+		goto filterend;
+	}
+
+	read_linecount = curbuf->b_ml.ml_line_count - read_linecount;
+
+	if (shell_flags & SHELL_READ)
+	{
+	    curbuf->b_op_start.lnum = line2 + 1;
+	    curbuf->b_op_end.lnum = curwin->w_cursor.lnum;
+	    appended_lines_mark(line2, read_linecount);
+	}
+
+	if (do_in)
+	{
+	    if ((cmdmod.cmod_flags & CMOD_KEEPMARKS)
+				     || vim_strchr(p_cpo, CPO_REMMARK) == NULL)
+	    {
+		if (read_linecount >= linecount)
+		    // move all marks from old lines to new lines
+		    mark_adjust(line1, line2, linecount, 0L);
+		else if (save_cmod_flags & CMOD_LOCKMARKS)
+		{
+		    // Move marks from the lines below the new lines down by
+		    // the number of lines lost.
+		    // Move marks from the lines that will be deleted to the
+		    // new lines and below.
+		    mark_adjust(line2 + 1, (linenr_T)MAXLNUM,
+					       linecount - read_linecount, 0L);
+		    mark_adjust(line1, line2, linecount, 0L);
+		}
+		else
+		{
+		    // move marks from old lines to new lines, delete marks
+		    // that are in deleted lines
+		    mark_adjust(line1, line1 + read_linecount - 1,
+								linecount, 0L);
+		    mark_adjust(line1 + read_linecount, line2, MAXLNUM, 0L);
+		}
+	    }
+
+	    /*
+	     * Put cursor on first filtered line for ":range!cmd".
+	     * Adjust '[ and '] (set by buf_write()).
+	     */
+	    curwin->w_cursor.lnum = line1;
+	    del_lines(linecount, TRUE);
+	    curbuf->b_op_start.lnum -= linecount;	// adjust '[
+	    curbuf->b_op_end.lnum -= linecount;		// adjust ']
+	    write_lnum_adjust(-linecount);		// adjust last line
+							// for next write
+#ifdef FEAT_FOLDING
+	    foldUpdate(curwin, curbuf->b_op_start.lnum, curbuf->b_op_end.lnum);
+#endif
+	}
+	else
+	{
+	    /*
+	     * Put cursor on last new line for ":r !cmd".
+	     */
+	    linecount = curbuf->b_op_end.lnum - curbuf->b_op_start.lnum + 1;
+	    curwin->w_cursor.lnum = curbuf->b_op_end.lnum;
+	}
+
+	beginline(BL_WHITE | BL_FIX);	    // cursor on first non-blank
+	--no_wait_return;
+
+	if (linecount > p_report)
+	{
+	    if (do_in)
+	    {
+		vim_snprintf(msg_buf, sizeof(msg_buf),
+				    _("%ld lines filtered"), (long)linecount);
+		if (msg(msg_buf) && !msg_scroll)
+		    // save message to display it after redraw
+		    set_keep_msg((char_u *)msg_buf, 0);
+	    }
+	    else
+		msgmore((long)linecount);
+	}
+    }
+    else
+    {
+error:
+	// put cursor back in same position for ":w !cmd"
+	curwin->w_cursor = cursor_save;
+	--no_wait_return;
+	wait_return(FALSE);
+    }
+
+filterend:
+
+    cmdmod.cmod_flags = save_cmod_flags;
+    if (curbuf != old_curbuf)
+    {
+	--no_wait_return;
+	emsg(_(e_filter_autocommands_must_not_change_current_buffer));
+    }
+    else if (cmdmod.cmod_flags & CMOD_LOCKMARKS)
+    {
+	curbuf->b_op_start = orig_start;
+	curbuf->b_op_end = orig_end;
+    }
+
+    if (itmp != NULL)
+	mch_remove(itmp);
+    if (otmp != NULL)
+	mch_remove(otmp);
+    vim_free(itmp);
+    vim_free(otmp);
+}
+
+/*
+ * Call a shell to execute a command.
+ * When "cmd" is NULL start an interactive shell.
+ */
+    void
+do_shell(
+    char_u	*cmd,
+    int		flags)	// may be SHELL_DOOUT when output is redirected
+{
+    buf_T	*buf;
+#if !defined(FEAT_GUI_MSWIN) || defined(VIMDLL)
+    int		save_nwr;
+#endif
+#ifdef MSWIN
+    int		winstart = FALSE;
+#endif
+    int		keep_termcap = !termcap_active;
+
+    /*
+     * Disallow shell commands for "rvim".
+     * Disallow shell commands from .exrc and .vimrc in current directory for
+     * security reasons.
+     */
+    if (check_restricted() || check_secure())
+    {
+	msg_end();
+	return;
+    }
+
+#ifdef MSWIN
+    /*
+     * Check if ":!start" is used.  This implies not stopping termcap mode.
+     */
+    if (cmd != NULL)
+	keep_termcap = winstart = (STRNICMP(cmd, "start ", 6) == 0);
+
+# if defined(FEAT_GUI) && defined(FEAT_TERMINAL)
+    // Don't stop termcap mode when using a terminal window for the shell.
+    if (gui.in_use && vim_strchr(p_go, GO_TERMINAL) != NULL)
+	keep_termcap = TRUE;
+# endif
+#endif
+
+    /*
+     * For autocommands we want to get the output on the current screen, to
+     * avoid having to type return below.
+     */
+    msg_putchar('\r');			// put cursor at start of line
+    if (!autocmd_busy)
+    {
+	if (!keep_termcap)
+	    stoptermcap();
+    }
+#ifdef MSWIN
+    if (!winstart)
+#endif
+	msg_putchar('\n');		// may shift screen one line up
+
+    // warning message before calling the shell
+    if (p_warn && !autocmd_busy && msg_silent == 0)
+	FOR_ALL_BUFFERS(buf)
+	    if (bufIsChangedNotTerm(buf))
+	    {
+#ifdef FEAT_GUI_MSWIN
+		if (!keep_termcap)
+		    starttermcap();	// don't want a message box here
+#endif
+		msg_puts(_("[No write since last change]\n"));
+#ifdef FEAT_GUI_MSWIN
+		if (!keep_termcap)
+		    stoptermcap();
+#endif
+		break;
+	    }
+
+    // This windgoto is required for when the '\n' resulted in a "delete line
+    // 1" command to the terminal.
+    if (!swapping_screen())
+	windgoto(msg_row, msg_col);
+    cursor_on();
+    (void)call_shell(cmd, SHELL_COOKED | flags);
+    did_check_timestamps = FALSE;
+    need_check_timestamps = TRUE;
+
+    /*
+     * put the message cursor at the end of the screen, avoids wait_return()
+     * to overwrite the text that the external command showed
+     */
+    if (!swapping_screen())
+    {
+	msg_row = Rows - 1;
+	msg_col = 0;
+    }
+
+    if (autocmd_busy)
+    {
+	if (msg_silent == 0)
+	    redraw_later_clear();
+    }
+    else
+    {
+	/*
+	 * For ":sh" there is no need to call wait_return(), just redraw.
+	 * Also for the Win32 GUI (the output is in a console window).
+	 * Otherwise there is probably text on the screen that the user wants
+	 * to read before redrawing, so call wait_return().
+	 */
+#if !defined(FEAT_GUI_MSWIN) || defined(VIMDLL)
+# ifdef VIMDLL
+	if (!gui.in_use)
+# endif
+	{
+	    if (cmd == NULL
+# ifdef MSWIN
+		    || (keep_termcap && !need_wait_return)
+# endif
+	       )
+	    {
+		if (msg_silent == 0)
+		    redraw_later_clear();
+		need_wait_return = FALSE;
+	    }
+	    else
+	    {
+		/*
+		 * If we switch screens when starttermcap() is called, we
+		 * really want to wait for "hit return to continue".
+		 */
+		save_nwr = no_wait_return;
+		if (swapping_screen())
+		    no_wait_return = FALSE;
+# ifdef AMIGA
+		wait_return(term_console ? -1 : msg_silent == 0); // see below
+# else
+		wait_return(msg_silent == 0);
+# endif
+		no_wait_return = save_nwr;
+	    }
+	}
+#endif // FEAT_GUI_MSWIN
+
+	if (!keep_termcap)	// if keep_termcap is TRUE didn't stop termcap
+	    starttermcap();	// start termcap if not done by wait_return()
+
+	/*
+	 * In an Amiga window redrawing is caused by asking the window size.
+	 * If we got an interrupt this will not work. The chance that the
+	 * window size is wrong is very small, but we need to redraw the
+	 * screen.  Don't do this if ':' hit in wait_return().	THIS IS UGLY
+	 * but it saves an extra redraw.
+	 */
+#ifdef AMIGA
+	if (skip_redraw)		// ':' hit in wait_return()
+	{
+	    if (msg_silent == 0)
+		redraw_later_clear();
+	}
+	else if (term_console)
+	{
+	    OUT_STR("\033[0 q");	// get window size
+	    if (got_int && msg_silent == 0)
+		redraw_later_clear();	// if got_int is TRUE, redraw needed
+	    else
+		must_redraw = 0;	// no extra redraw needed
+	}
+#endif
+    }
+
+    // display any error messages now
+    display_errors();
+
+    apply_autocmds(EVENT_SHELLCMDPOST, NULL, NULL, FALSE, curbuf);
+}
+
+#if !defined(UNIX)
+    static char_u *
+find_pipe(char_u *cmd)
+{
+    char_u  *p;
+    int	    inquote = FALSE;
+
+    for (p = cmd; *p != NUL; ++p)
+    {
+	if (!inquote && *p == '|')
+	    return p;
+	if (*p == '"')
+	    inquote = !inquote;
+	else if (rem_backslash(p))
+	    ++p;
+    }
+    return NULL;
+}
+#endif
+
+/*
+ * Create a shell command from a command string, input redirection file and
+ * output redirection file.
+ * Returns an allocated string with the shell command, or NULL for failure.
+ */
+    char_u *
+make_filter_cmd(
+    char_u	*cmd,		// command
+    char_u	*itmp,		// NULL or name of input file
+    char_u	*otmp)		// NULL or name of output file
+{
+    char_u	*buf;
+    long_u	len;
+    int		is_powershell = FALSE;
+#ifdef UNIX
+    int		is_fish_shell;
+#endif
+
+    char_u *shell_name = get_isolated_shell_name();
+    if (shell_name == NULL)
+	return NULL;
+
+#if defined(UNIX)
+    // Account for fish's different syntax for subshells
+    is_fish_shell = fnamecmp(shell_name, "fish") == 0;
+    if (is_fish_shell)
+	len = (long_u)STRLEN(cmd) + 13;		// "begin; " + "; end" + NUL
+    else
+#endif
+    {
+	is_powershell = (shell_name[0] == 'p')
+			&& (fnamecmp(shell_name, "powershell") == 0
+				|| fnamecmp(shell_name, "powershell.exe") == 0
+				|| fnamecmp(shell_name, "pwsh") == 0
+				|| fnamecmp(shell_name, "pwsh.exe") == 0);
+	len = (long_u)STRLEN(cmd) + 3;		// "()" + NUL
+    }
+
+    if (itmp != NULL)
+    {
+	if (is_powershell)
+	    // "& { Get-Content " + " | & " + " }"
+	    len += (long_u)STRLEN(itmp) + 24;
+	else
+	    len += (long_u)STRLEN(itmp) + 9;	// " { < " + " } "
+    }
+    if (otmp != NULL)
+	len += (long_u)STRLEN(otmp) + (long_u)STRLEN(p_srr) + 2; // "  "
+
+    vim_free(shell_name);
+
+    buf = alloc(len);
+    if (buf == NULL)
+	return NULL;
+
+    if (is_powershell)
+    {
+	if (itmp != NULL)
+	    vim_snprintf((char *)buf, len, "& { Get-Content %s | & %s }",
+								itmp, cmd);
+	else
+	    vim_snprintf((char *)buf, len, "(%s)", cmd);
+    }
+    else
+    {
+#if defined(UNIX)
+	// Put braces around the command (for concatenated commands) when
+	// redirecting input and/or output.
+	if (itmp != NULL || otmp != NULL)
+	{
+	    if (is_fish_shell)
+		vim_snprintf((char *)buf, len, "begin; %s; end", (char *)cmd);
+	    else
+		vim_snprintf((char *)buf, len, "(%s)", (char *)cmd);
+	}
+	else
+	    STRCPY(buf, cmd);
+	if (itmp != NULL)
+	{
+	    STRCAT(buf, " < ");
+	    STRCAT(buf, itmp);
+	}
+#else
+	// For shells that don't understand braces around commands, at least
+	// allow the use of commands in a pipe.
+	if (*p_sxe != NUL && *p_sxq == '(')
+	{
+	    if (itmp != NULL || otmp != NULL)
+		vim_snprintf((char *)buf, len, "(%s)", (char *)cmd);
+	    else
+		STRCPY(buf, cmd);
+	    if (itmp != NULL)
+	    {
+		STRCAT(buf, " < ");
+		STRCAT(buf, itmp);
+	    }
+	}
+	else
+	{
+	    STRCPY(buf, cmd);
+	    if (itmp != NULL)
+	    {
+		char_u	*p;
+
+		// If there is a pipe, we have to put the '<' in front of it.
+		// Don't do this when 'shellquote' is not empty, otherwise the
+		// redirection would be inside the quotes.
+		if (*p_shq == NUL)
+		{
+		    p = find_pipe(buf);
+		    if (p != NULL)
+			*p = NUL;
+		}
+		STRCAT(buf, " <");	// " < " causes problems on Amiga
+		STRCAT(buf, itmp);
+		if (*p_shq == NUL)
+		{
+		    p = find_pipe(cmd);
+		    if (p != NULL)
+		    {
+			// insert a space before the '|' for DOS
+			STRCAT(buf, " ");
+			STRCAT(buf, p);
+		    }
+		}
+	    }
+	}
+#endif
+    }
+    if (otmp != NULL)
+	append_redir(buf, (int)len, p_srr, otmp);
+
+    return buf;
+}
+
+/*
+ * Append output redirection for file "fname" to the end of string buffer
+ * "buf[buflen]"
+ * Works with the 'shellredir' and 'shellpipe' options.
+ * The caller should make sure that there is enough room:
+ *	STRLEN(opt) + STRLEN(fname) + 3
+ */
+    void
+append_redir(
+    char_u	*buf,
+    int		buflen,
+    char_u	*opt,
+    char_u	*fname)
+{
+    char_u	*p;
+    char_u	*end;
+
+    end = buf + STRLEN(buf);
+    // find "%s"
+    for (p = opt; (p = vim_strchr(p, '%')) != NULL; ++p)
+    {
+	if (p[1] == 's') // found %s
+	    break;
+	if (p[1] == '%') // skip %%
+	    ++p;
+    }
+    if (p != NULL)
+    {
+#ifdef MSWIN
+	*end++ = ' '; // not really needed? Not with sh, ksh or bash
+#endif
+	vim_snprintf((char *)end, (size_t)(buflen - (end - buf)),
+						  (char *)opt, (char *)fname);
+    }
+    else
+	vim_snprintf((char *)end, (size_t)(buflen - (end - buf)), " %s %s",
+		(char *)opt, (char *)fname);
+}
+
+/*
+ * Implementation of ":fixdel", also used by get_stty().
+ *  <BS>    resulting <Del>
+ *   ^?		^H
+ * not ^?	^?
+ */
+    void
+do_fixdel(exarg_T *eap UNUSED)
+{
+    char_u  *p;
+
+    p = find_termcode((char_u *)"kb");
+    add_termcode((char_u *)"kD", p != NULL
+	    && *p == DEL ? (char_u *)CTRL_H_STR : DEL_STR, FALSE);
+}
+
+    void
+print_line_no_prefix(
+    linenr_T	lnum,
+    int		use_number,
+    int		list)
+{
+    char	numbuf[30];
+
+    if (curwin->w_p_nu || use_number)
+    {
+	vim_snprintf(numbuf, sizeof(numbuf),
+				   "%*ld ", number_width(curwin), (long)lnum);
+	msg_puts_attr(numbuf, HL_ATTR(HLF_N));	// Highlight line nrs
+    }
+    msg_prt_line(ml_get(lnum), list);
+}
+
+/*
+ * Print a text line.  Also in silent mode ("ex -s").
+ */
+    void
+print_line(linenr_T lnum, int use_number, int list)
+{
+    int		save_silent = silent_mode;
+
+    // apply :filter /pat/
+    if (message_filtered(ml_get(lnum)))
+	return;
+
+    msg_start();
+    silent_mode = FALSE;
+    info_message = TRUE;	// use mch_msg(), not mch_errmsg()
+    print_line_no_prefix(lnum, use_number, list);
+    if (save_silent)
+    {
+	msg_putchar('\n');
+	cursor_on();		// msg_start() switches it off
+	out_flush();
+	silent_mode = save_silent;
+    }
+    info_message = FALSE;
+}
+
+    int
+rename_buffer(char_u *new_fname)
+{
+    char_u	*fname, *sfname, *xfname;
+    buf_T	*buf;
+
+    buf = curbuf;
+    apply_autocmds(EVENT_BUFFILEPRE, NULL, NULL, FALSE, curbuf);
+    // buffer changed, don't change name now
+    if (buf != curbuf)
+	return FAIL;
+#ifdef FEAT_EVAL
+    if (aborting())	    // autocmds may abort script processing
+	return FAIL;
+#endif
+    /*
+     * The name of the current buffer will be changed.
+     * A new (unlisted) buffer entry needs to be made to hold the old file
+     * name, which will become the alternate file name.
+     * But don't set the alternate file name if the buffer didn't have a
+     * name.
+     */
+    fname = curbuf->b_ffname;
+    sfname = curbuf->b_sfname;
+    xfname = curbuf->b_fname;
+    curbuf->b_ffname = NULL;
+    curbuf->b_sfname = NULL;
+    if (setfname(curbuf, new_fname, NULL, TRUE) == FAIL)
+    {
+	curbuf->b_ffname = fname;
+	curbuf->b_sfname = sfname;
+	return FAIL;
+    }
+    curbuf->b_flags |= BF_NOTEDITED;
+    if (xfname != NULL && *xfname != NUL)
+    {
+	buf = buflist_new(fname, xfname, curwin->w_cursor.lnum, 0);
+	if (buf != NULL && (cmdmod.cmod_flags & CMOD_KEEPALT) == 0)
+	    curwin->w_alt_fnum = buf->b_fnum;
+    }
+    vim_free(fname);
+    vim_free(sfname);
+    apply_autocmds(EVENT_BUFFILEPOST, NULL, NULL, FALSE, curbuf);
+
+    // Change directories when the 'acd' option is set.
+    DO_AUTOCHDIR;
+    return OK;
+}
+
+/*
+ * ":file[!] [fname]".
+ */
+    void
+ex_file(exarg_T *eap)
+{
+    // ":0file" removes the file name.  Check for illegal uses ":3file",
+    // "0file name", etc.
+    if (eap->addr_count > 0
+	    && (*eap->arg != NUL
+		|| eap->line2 > 0
+		|| eap->addr_count > 1))
+    {
+	emsg(_(e_invalid_argument));
+	return;
+    }
+
+    if (*eap->arg != NUL || eap->addr_count == 1)
+    {
+	if (rename_buffer(eap->arg) == FAIL)
+	    return;
+	redraw_tabline = TRUE;
+    }
+
+    // print file name if no argument or 'F' is not in 'shortmess'
+    if (*eap->arg == NUL || !shortmess(SHM_FILEINFO))
+	fileinfo(FALSE, FALSE, eap->forceit);
+}
+
+/*
+ * ":update".
+ */
+    void
+ex_update(exarg_T *eap)
+{
+    if (curbufIsChanged())
+	(void)do_write(eap);
+}
+
+/*
+ * ":write" and ":saveas".
+ */
+    void
+ex_write(exarg_T *eap)
+{
+    if (eap->cmdidx == CMD_saveas)
+    {
+	// :saveas does not take a range, uses all lines.
+	eap->line1 = 1;
+	eap->line2 = curbuf->b_ml.ml_line_count;
+    }
+
+    if (eap->usefilter)		// input lines to shell command
+	do_bang(1, eap, FALSE, TRUE, FALSE);
+    else
+	(void)do_write(eap);
+}
+
+#ifdef UNIX
+    static int
+check_writable(char_u *fname)
+{
+    if (mch_nodetype(fname) == NODE_OTHER)
+    {
+	semsg(_(e_str_is_not_file_or_writable_device), fname);
+	return FAIL;
+    }
+    return OK;
+}
+#endif
+
+/*
+ * Write the current buffer to file "eap->arg".
+ * If "eap->append" is TRUE, append to the file.
+ *
+ * If "*eap->arg == NUL" write to current file.
+ *
+ * Return FAIL for failure, OK otherwise.
+ */
+    int
+do_write(exarg_T *eap)
+{
+    int		other;
+    char_u	*fname = NULL;		// init to shut up gcc
+    char_u	*ffname;
+    int		retval = FAIL;
+    char_u	*free_fname = NULL;
+#ifdef FEAT_BROWSE
+    char_u	*browse_file = NULL;
+#endif
+    buf_T	*alt_buf = NULL;
+    int		name_was_missing;
+
+    if (not_writing())		// check 'write' option
+	return FAIL;
+
+    ffname = eap->arg;
+#ifdef FEAT_BROWSE
+    if ((cmdmod.cmod_flags & CMOD_BROWSE) && !exiting)
+    {
+	browse_file = do_browse(BROWSE_SAVE, (char_u *)_("Save As"), ffname,
+						    NULL, NULL, NULL, curbuf);
+	if (browse_file == NULL)
+	    goto theend;
+	ffname = browse_file;
+    }
+#endif
+    if (*ffname == NUL)
+    {
+	if (eap->cmdidx == CMD_saveas)
+	{
+	    emsg(_(e_argument_required));
+	    goto theend;
+	}
+	other = FALSE;
+    }
+    else
+    {
+	fname = ffname;
+	free_fname = fix_fname(ffname);
+	/*
+	 * When out-of-memory, keep unexpanded file name, because we MUST be
+	 * able to write the file in this situation.
+	 */
+	if (free_fname != NULL)
+	    ffname = free_fname;
+	other = otherfile(ffname);
+    }
+
+    /*
+     * If we have a new file, put its name in the list of alternate file names.
+     */
+    if (other)
+    {
+	if (vim_strchr(p_cpo, CPO_ALTWRITE) != NULL
+						 || eap->cmdidx == CMD_saveas)
+	    alt_buf = setaltfname(ffname, fname, (linenr_T)1);
+	else
+	    alt_buf = buflist_findname(ffname);
+	if (alt_buf != NULL && alt_buf->b_ml.ml_mfp != NULL)
+	{
+	    // Overwriting a file that is loaded in another buffer is not a
+	    // good idea.
+	    emsg(_(e_file_is_loaded_in_another_buffer));
+	    goto theend;
+	}
+    }
+
+    /*
+     * Writing to the current file is not allowed in readonly mode
+     * and a file name is required.
+     * "nofile" and "nowrite" buffers cannot be written implicitly either.
+     */
+    if (!other && (bt_dontwrite_msg(curbuf) || check_fname() == FAIL
+#ifdef UNIX
+		|| check_writable(curbuf->b_ffname) == FAIL
+#endif
+		|| check_readonly(&eap->forceit, curbuf)))
+	goto theend;
+
+    if (!other)
+    {
+	ffname = curbuf->b_ffname;
+	fname = curbuf->b_fname;
+	/*
+	 * Not writing the whole file is only allowed with '!'.
+	 */
+	if (	   (eap->line1 != 1
+		    || eap->line2 != curbuf->b_ml.ml_line_count)
+		&& !eap->forceit
+		&& !eap->append
+		&& !p_wa)
+	{
+#if defined(FEAT_GUI_DIALOG) || defined(FEAT_CON_DIALOG)
+	    if (p_confirm || (cmdmod.cmod_flags & CMOD_CONFIRM))
+	    {
+		if (vim_dialog_yesno(VIM_QUESTION, NULL,
+			       (char_u *)_("Write partial file?"), 2) != VIM_YES)
+		    goto theend;
+		eap->forceit = TRUE;
+	    }
+	    else
+#endif
+	    {
+		emsg(_(e_use_bang_to_write_partial_buffer));
+		goto theend;
+	    }
+	}
+    }
+
+    if (check_overwrite(eap, curbuf, fname, ffname, other) == OK)
+    {
+	if (eap->cmdidx == CMD_saveas && alt_buf != NULL)
+	{
+	    buf_T	*was_curbuf = curbuf;
+
+	    apply_autocmds(EVENT_BUFFILEPRE, NULL, NULL, FALSE, curbuf);
+	    apply_autocmds(EVENT_BUFFILEPRE, NULL, NULL, FALSE, alt_buf);
+#ifdef FEAT_EVAL
+	    if (curbuf != was_curbuf || aborting())
+#else
+	    if (curbuf != was_curbuf)
+#endif
+	    {
+		// buffer changed, don't change name now
+		retval = FAIL;
+		goto theend;
+	    }
+	    // Exchange the file names for the current and the alternate
+	    // buffer.  This makes it look like we are now editing the buffer
+	    // under the new name.  Must be done before buf_write(), because
+	    // if there is no file name and 'cpo' contains 'F', it will set
+	    // the file name.
+	    fname = alt_buf->b_fname;
+	    alt_buf->b_fname = curbuf->b_fname;
+	    curbuf->b_fname = fname;
+	    fname = alt_buf->b_ffname;
+	    alt_buf->b_ffname = curbuf->b_ffname;
+	    curbuf->b_ffname = fname;
+	    fname = alt_buf->b_sfname;
+	    alt_buf->b_sfname = curbuf->b_sfname;
+	    curbuf->b_sfname = fname;
+	    buf_name_changed(curbuf);
+
+	    apply_autocmds(EVENT_BUFFILEPOST, NULL, NULL, FALSE, curbuf);
+	    apply_autocmds(EVENT_BUFFILEPOST, NULL, NULL, FALSE, alt_buf);
+	    if (!alt_buf->b_p_bl)
+	    {
+		alt_buf->b_p_bl = TRUE;
+		apply_autocmds(EVENT_BUFADD, NULL, NULL, FALSE, alt_buf);
+	    }
+#ifdef FEAT_EVAL
+	    if (curbuf != was_curbuf || aborting())
+#else
+	    if (curbuf != was_curbuf)
+#endif
+	    {
+		// buffer changed, don't write the file
+		retval = FAIL;
+		goto theend;
+	    }
+
+	    // If 'filetype' was empty try detecting it now.
+	    if (*curbuf->b_p_ft == NUL)
+	    {
+		if (au_has_group((char_u *)"filetypedetect"))
+		    (void)do_doautocmd((char_u *)"filetypedetect BufRead",
+								  TRUE, NULL);
+		do_modelines(0);
+	    }
+
+	    // Autocommands may have changed buffer names, esp. when
+	    // 'autochdir' is set.
+	    fname = curbuf->b_sfname;
+	}
+
+	name_was_missing = curbuf->b_ffname == NULL;
+
+	retval = buf_write(curbuf, ffname, fname, eap->line1, eap->line2,
+				 eap, eap->append, eap->forceit, TRUE, FALSE);
+
+	// After ":saveas fname" reset 'readonly'.
+	if (eap->cmdidx == CMD_saveas)
+	{
+	    if (retval == OK)
+	    {
+		curbuf->b_p_ro = FALSE;
+		redraw_tabline = TRUE;
+	    }
+	}
+
+	// Change directories when the 'acd' option is set and the file name
+	// got changed or set.
+	if (eap->cmdidx == CMD_saveas || name_was_missing)
+	    DO_AUTOCHDIR;
+    }
+
+theend:
+#ifdef FEAT_BROWSE
+    vim_free(browse_file);
+#endif
+    vim_free(free_fname);
+    return retval;
+}
+
+/*
+ * Check if it is allowed to overwrite a file.  If b_flags has BF_NOTEDITED,
+ * BF_NEW or BF_READERR, check for overwriting current file.
+ * May set eap->forceit if a dialog says it's OK to overwrite.
+ * Return OK if it's OK, FAIL if it is not.
+ */
+    int
+check_overwrite(
+    exarg_T	*eap,
+    buf_T	*buf,
+    char_u	*fname,	    // file name to be used (can differ from
+			    // buf->ffname)
+    char_u	*ffname,    // full path version of fname
+    int		other)	    // writing under other name
+{
+    /*
+     * Write to another file or b_flags set or not writing the whole file:
+     * overwriting only allowed with '!'.
+     * If "other" is FALSE and bt_nofilename(buf) is TRUE, this must be
+     * writing an "acwrite" buffer to the same file as its b_ffname, and
+     * buf_write() will only allow writing with BufWriteCmd autocommands,
+     * so there is no need for an overwrite check.
+     */
+    if (       (other
+		|| (!bt_nofilename(buf)
+		    && ((buf->b_flags & BF_NOTEDITED)
+			|| ((buf->b_flags & BF_NEW)
+			    && vim_strchr(p_cpo, CPO_OVERNEW) == NULL)
+			|| (buf->b_flags & BF_READERR))))
+	    && !p_wa
+	    && vim_fexists(ffname))
+    {
+	if (!eap->forceit && !eap->append)
+	{
+#ifdef UNIX
+	    // with UNIX it is possible to open a directory
+	    if (mch_isdir(ffname))
+	    {
+		semsg(_(e_str_is_directory), ffname);
+		return FAIL;
+	    }
+#endif
+#if defined(FEAT_GUI_DIALOG) || defined(FEAT_CON_DIALOG)
+	    if (p_confirm || (cmdmod.cmod_flags & CMOD_CONFIRM))
+	    {
+		char_u	buff[DIALOG_MSG_SIZE];
+
+		dialog_msg(buff, _("Overwrite existing file \"%s\"?"), fname);
+		if (vim_dialog_yesno(VIM_QUESTION, NULL, buff, 2) != VIM_YES)
+		    return FAIL;
+		eap->forceit = TRUE;
+	    }
+	    else
+#endif
+	    {
+		emsg(_(e_file_exists));
+		return FAIL;
+	    }
+	}
+
+	// For ":w! filename" check that no swap file exists for "filename".
+	if (other && !emsg_silent)
+	{
+	    char_u	*dir;
+	    char_u	*p;
+	    int		r;
+	    char_u	*swapname;
+
+	    // We only try the first entry in 'directory', without checking if
+	    // it's writable.  If the "." directory is not writable the write
+	    // will probably fail anyway.
+	    // Use 'shortname' of the current buffer, since there is no buffer
+	    // for the written file.
+	    if (*p_dir == NUL)
+	    {
+		dir = alloc(5);
+		if (dir == NULL)
+		    return FAIL;
+		STRCPY(dir, ".");
+	    }
+	    else
+	    {
+		dir = alloc(MAXPATHL);
+		if (dir == NULL)
+		    return FAIL;
+		p = p_dir;
+		copy_option_part(&p, dir, MAXPATHL, ",");
+	    }
+	    swapname = makeswapname(fname, ffname, curbuf, dir);
+	    vim_free(dir);
+	    r = vim_fexists(swapname);
+	    if (r)
+	    {
+#if defined(FEAT_GUI_DIALOG) || defined(FEAT_CON_DIALOG)
+		if (p_confirm || (cmdmod.cmod_flags & CMOD_CONFIRM))
+		{
+		    char_u	buff[DIALOG_MSG_SIZE];
+
+		    dialog_msg(buff,
+			    _("Swap file \"%s\" exists, overwrite anyway?"),
+								    swapname);
+		    if (vim_dialog_yesno(VIM_QUESTION, NULL, buff, 2)
+								   != VIM_YES)
+		    {
+			vim_free(swapname);
+			return FAIL;
+		    }
+		    eap->forceit = TRUE;
+		}
+		else
+#endif
+		{
+		    semsg(_(e_swap_file_exists_str_silent_overrides), swapname);
+		    vim_free(swapname);
+		    return FAIL;
+		}
+	    }
+	    vim_free(swapname);
+	}
+    }
+    return OK;
+}
+
+/*
+ * Handle ":wnext", ":wNext" and ":wprevious" commands.
+ */
+    void
+ex_wnext(exarg_T *eap)
+{
+    int		i;
+
+    if (eap->cmd[1] == 'n')
+	i = curwin->w_arg_idx + (int)eap->line2;
+    else
+	i = curwin->w_arg_idx - (int)eap->line2;
+    eap->line1 = 1;
+    eap->line2 = curbuf->b_ml.ml_line_count;
+    if (do_write(eap) != FAIL)
+	do_argfile(eap, i);
+}
+
+/*
+ * ":wall", ":wqall" and ":xall": Write all changed files (and exit).
+ */
+    void
+do_wqall(exarg_T *eap)
+{
+    buf_T	*buf;
+    int		error = 0;
+    int		save_forceit = eap->forceit;
+
+    if (eap->cmdidx == CMD_xall || eap->cmdidx == CMD_wqall)
+	exiting = TRUE;
+
+    FOR_ALL_BUFFERS(buf)
+    {
+#ifdef FEAT_TERMINAL
+	if (exiting && term_job_running(buf->b_term))
+	{
+	    no_write_message_nobang(buf);
+	    ++error;
+	}
+	else
+#endif
+	if (bufIsChanged(buf) && !bt_dontwrite(buf))
+	{
+	    /*
+	     * Check if there is a reason the buffer cannot be written:
+	     * 1. if the 'write' option is set
+	     * 2. if there is no file name (even after browsing)
+	     * 3. if the 'readonly' is set (even after a dialog)
+	     * 4. if overwriting is allowed (even after a dialog)
+	     */
+	    if (not_writing())
+	    {
+		++error;
+		break;
+	    }
+#ifdef FEAT_BROWSE
+	    // ":browse wall": ask for file name if there isn't one
+	    if (buf->b_ffname == NULL && (cmdmod.cmod_flags & CMOD_BROWSE))
+		browse_save_fname(buf);
+#endif
+	    if (buf->b_ffname == NULL)
+	    {
+		semsg(_(e_no_file_name_for_buffer_nr), (long)buf->b_fnum);
+		++error;
+	    }
+	    else if (check_readonly(&eap->forceit, buf)
+		    || check_overwrite(eap, buf, buf->b_fname, buf->b_ffname,
+							       FALSE) == FAIL)
+	    {
+		++error;
+	    }
+	    else
+	    {
+		bufref_T bufref;
+
+		set_bufref(&bufref, buf);
+		if (buf_write_all(buf, eap->forceit) == FAIL)
+		    ++error;
+		// an autocommand may have deleted the buffer
+		if (!bufref_valid(&bufref))
+		    buf = firstbuf;
+	    }
+	    eap->forceit = save_forceit;    // check_overwrite() may set it
+	}
+    }
+    if (exiting)
+    {
+	if (!error)
+	    getout(0);		// exit Vim
+	not_exiting();
+    }
+}
+
+/*
+ * Check the 'write' option.
+ * Return TRUE and give a message when it's not set.
+ */
+    static int
+not_writing(void)
+{
+    if (p_write)
+	return FALSE;
+    emsg(_(e_file_not_written_writing_is_disabled_by_write_option));
+    return TRUE;
+}
+
+/*
+ * Check if a buffer is read-only (either 'readonly' option is set or file is
+ * read-only). Ask for overruling in a dialog. Return TRUE and give an error
+ * message when the buffer is readonly.
+ */
+    static int
+check_readonly(int *forceit, buf_T *buf)
+{
+    stat_T	st;
+
+    // Handle a file being readonly when the 'readonly' option is set or when
+    // the file exists and permissions are read-only.
+    // We will send 0777 to check_file_readonly(), as the "perm" variable is
+    // important for device checks but not here.
+    if (!*forceit && (buf->b_p_ro
+		|| (mch_stat((char *)buf->b_ffname, &st) >= 0
+		    && check_file_readonly(buf->b_ffname, 0777))))
+    {
+#if defined(FEAT_GUI_DIALOG) || defined(FEAT_CON_DIALOG)
+	if ((p_confirm || (cmdmod.cmod_flags & CMOD_CONFIRM))
+						       && buf->b_fname != NULL)
+	{
+	    char_u	buff[DIALOG_MSG_SIZE];
+
+	    if (buf->b_p_ro)
+		dialog_msg(buff, _("'readonly' option is set for \"%s\".\nDo you wish to write anyway?"),
+		    buf->b_fname);
+	    else
+		dialog_msg(buff, _("File permissions of \"%s\" are read-only.\nIt may still be possible to write it.\nDo you wish to try?"),
+		    buf->b_fname);
+
+	    if (vim_dialog_yesno(VIM_QUESTION, NULL, buff, 2) == VIM_YES)
+	    {
+		// Set forceit, to force the writing of a readonly file
+		*forceit = TRUE;
+		return FALSE;
+	    }
+	    else
+		return TRUE;
+	}
+	else
+#endif
+	if (buf->b_p_ro)
+	    emsg(_(e_readonly_option_is_set_add_bang_to_override));
+	else
+	    semsg(_(e_str_is_read_only_add_bang_to_override), buf->b_fname);
+	return TRUE;
+    }
+
+    return FALSE;
+}
+
+/*
+ * Try to abandon the current file and edit a new or existing file.
+ * "fnum" is the number of the file, if zero use "ffname_arg"/"sfname_arg".
+ * "lnum" is the line number for the cursor in the new file (if non-zero).
+ *
+ * Return:
+ * GETFILE_ERROR for "normal" error,
+ * GETFILE_NOT_WRITTEN for "not written" error,
+ * GETFILE_SAME_FILE for success
+ * GETFILE_OPEN_OTHER for successfully opening another file.
+ */
+    int
+getfile(
+    int		fnum,
+    char_u	*ffname_arg,
+    char_u	*sfname_arg,
+    int		setpm,
+    linenr_T	lnum,
+    int		forceit)
+{
+    char_u	*ffname = ffname_arg;
+    char_u	*sfname = sfname_arg;
+    int		other;
+    int		retval;
+    char_u	*free_me = NULL;
+
+    if (text_locked())
+	return GETFILE_ERROR;
+    if (curbuf_locked())
+	return GETFILE_ERROR;
+
+    if (fnum == 0)
+    {
+					// make ffname full path, set sfname
+	fname_expand(curbuf, &ffname, &sfname);
+	other = otherfile(ffname);
+	free_me = ffname;		// has been allocated, free() later
+    }
+    else
+	other = (fnum != curbuf->b_fnum);
+
+    if (other)
+	++no_wait_return;	    // don't wait for autowrite message
+    if (other && !forceit && curbuf->b_nwindows == 1 && !buf_hide(curbuf)
+		   && curbufIsChanged() && autowrite(curbuf, forceit) == FAIL)
+    {
+#if defined(FEAT_GUI_DIALOG) || defined(FEAT_CON_DIALOG)
+	if (p_confirm && p_write)
+	    dialog_changed(curbuf, FALSE);
+	if (curbufIsChanged())
+#endif
+	{
+	    --no_wait_return;
+	    no_write_message();
+	    retval = GETFILE_NOT_WRITTEN;	// file has been changed
+	    goto theend;
+	}
+    }
+    if (other)
+	--no_wait_return;
+    if (setpm)
+	setpcmark();
+    if (!other)
+    {
+	if (lnum != 0)
+	    curwin->w_cursor.lnum = lnum;
+	check_cursor_lnum();
+	beginline(BL_SOL | BL_FIX);
+	retval = GETFILE_SAME_FILE;	// it's in the same file
+    }
+    else if (do_ecmd(fnum, ffname, sfname, NULL, lnum,
+	     (buf_hide(curbuf) ? ECMD_HIDE : 0) + (forceit ? ECMD_FORCEIT : 0),
+		curwin) == OK)
+	retval = GETFILE_OPEN_OTHER;	// opened another file
+    else
+	retval = GETFILE_ERROR;		// error encountered
+
+theend:
+    vim_free(free_me);
+    return retval;
+}
+
+/*
+ * start editing a new file
+ *
+ *     fnum: file number; if zero use ffname/sfname
+ *   ffname: the file name
+ *		- full path if sfname used,
+ *		- any file name if sfname is NULL
+ *		- empty string to re-edit with the same file name (but may be
+ *		    in a different directory)
+ *		- NULL to start an empty buffer
+ *   sfname: the short file name (or NULL)
+ *	eap: contains the command to be executed after loading the file and
+ *	     forced 'ff' and 'fenc'
+ *  newlnum: if > 0: put cursor on this line number (if possible)
+ *	     if ECMD_LASTL: use last position in loaded file
+ *	     if ECMD_LAST: use last position in all files
+ *	     if ECMD_ONE: use first line
+ *    flags:
+ *	   ECMD_HIDE: if TRUE don't free the current buffer
+ *     ECMD_SET_HELP: set b_help flag of (new) buffer before opening file
+ *	 ECMD_OLDBUF: use existing buffer if it exists
+ *	ECMD_FORCEIT: ! used for Ex command
+ *	 ECMD_ADDBUF: don't edit, just add to buffer list
+ *	 ECMD_ALTBUF: like ECMD_ADDBUF and also set the alternate file
+ *   ECMD_NOWINENTER: Do not trigger BufWinEnter
+ *   oldwin: Should be "curwin" when editing a new buffer in the current
+ *	     window, NULL when splitting the window first.  When not NULL info
+ *	     of the previous buffer for "oldwin" is stored.
+ *
+ * return FAIL for failure, OK otherwise
+ */
+    int
+do_ecmd(
+    int		fnum,
+    char_u	*ffname,
+    char_u	*sfname,
+    exarg_T	*eap,			// can be NULL!
+    linenr_T	newlnum,
+    int		flags,
+    win_T	*oldwin)
+{
+    int		other_file;		// TRUE if editing another file
+    int		oldbuf;			// TRUE if using existing buffer
+    int		auto_buf = FALSE;	// TRUE if autocommands brought us
+					// into the buffer unexpectedly
+    char_u	*new_name = NULL;
+#if defined(FEAT_EVAL)
+    int		did_set_swapcommand = FALSE;
+#endif
+    buf_T	*buf;
+    bufref_T	bufref;
+    bufref_T	old_curbuf;
+    char_u	*free_fname = NULL;
+#ifdef FEAT_BROWSE
+    char_u	dot_path[] = ".";
+    char_u	*browse_file = NULL;
+#endif
+    int		retval = FAIL;
+    long	n;
+    pos_T	orig_pos;
+    linenr_T	topline = 0;
+    int		newcol = -1;
+    int		solcol = -1;
+    pos_T	*pos;
+    char_u	*command = NULL;
+#ifdef FEAT_SPELL
+    int		did_get_winopts = FALSE;
+#endif
+    int		readfile_flags = 0;
+    int		did_inc_redrawing_disabled = FALSE;
+    long	*so_ptr = curwin->w_p_so >= 0 ? &curwin->w_p_so : &p_so;
+
+#ifdef FEAT_PROP_POPUP
+    if (ERROR_IF_TERM_POPUP_WINDOW)
+	return FAIL;
+#endif
+
+    if (eap != NULL)
+	command = eap->do_ecmd_cmd;
+    set_bufref(&old_curbuf, curbuf);
+
+    if (fnum != 0)
+    {
+	if (fnum == curbuf->b_fnum)	// file is already being edited
+	    return OK;			// nothing to do
+	other_file = TRUE;
+    }
+    else
+    {
+#ifdef FEAT_BROWSE
+	if ((cmdmod.cmod_flags & CMOD_BROWSE) && !exiting)
+	{
+	    if (
+# ifdef FEAT_GUI
+		!gui.in_use &&
+# endif
+		    au_has_group((char_u *)"FileExplorer"))
+	    {
+		// No browsing supported but we do have the file explorer:
+		// Edit the directory.
+		if (ffname == NULL || !mch_isdir(ffname))
+		    ffname = dot_path;
+	    }
+	    else
+	    {
+		browse_file = do_browse(0, (char_u *)_("Edit File"), ffname,
+						    NULL, NULL, NULL, curbuf);
+		if (browse_file == NULL)
+		    goto theend;
+		ffname = browse_file;
+	    }
+	}
+#endif
+	// if no short name given, use ffname for short name
+	if (sfname == NULL)
+	    sfname = ffname;
+#ifdef USE_FNAME_CASE
+	if (sfname != NULL)
+	    fname_case(sfname, 0);   // set correct case for sfname
+#endif
+
+	if ((flags & (ECMD_ADDBUF | ECMD_ALTBUF))
+					 && (ffname == NULL || *ffname == NUL))
+	    goto theend;
+
+	if (ffname == NULL)
+	    other_file = TRUE;
+					    // there is no file name
+	else if (*ffname == NUL && curbuf->b_ffname == NULL)
+	    other_file = FALSE;
+	else
+	{
+	    if (*ffname == NUL)		    // re-edit with same file name
+	    {
+		ffname = curbuf->b_ffname;
+		sfname = curbuf->b_fname;
+	    }
+	    free_fname = fix_fname(ffname); // may expand to full path name
+	    if (free_fname != NULL)
+		ffname = free_fname;
+	    other_file = otherfile(ffname);
+	}
+    }
+
+    /*
+     * If the file was changed we may not be allowed to abandon it:
+     * - if we are going to re-edit the same file
+     * - or if we are the only window on this file and if ECMD_HIDE is FALSE
+     */
+    if (  ((!other_file && !(flags & ECMD_OLDBUF))
+	    || (curbuf->b_nwindows == 1
+		&& !(flags & (ECMD_HIDE | ECMD_ADDBUF | ECMD_ALTBUF))))
+	&& check_changed(curbuf, (p_awa ? CCGD_AW : 0)
+			       | (other_file ? 0 : CCGD_MULTWIN)
+			       | ((flags & ECMD_FORCEIT) ? CCGD_FORCEIT : 0)
+			       | (eap == NULL ? 0 : CCGD_EXCMD)))
+    {
+	if (fnum == 0 && other_file && ffname != NULL)
+	    (void)setaltfname(ffname, sfname, newlnum < 0 ? 0 : newlnum);
+	goto theend;
+    }
+
+    /*
+     * End Visual mode before switching to another buffer, so the text can be
+     * copied into the GUI selection buffer.
+     */
+    reset_VIsual();
+
+#if defined(FEAT_EVAL)
+    if ((command != NULL || newlnum > (linenr_T)0)
+	    && *get_vim_var_str(VV_SWAPCOMMAND) == NUL)
+    {
+	int	len;
+	char_u	*p;
+
+	// Set v:swapcommand for the SwapExists autocommands.
+	if (command != NULL)
+	    len = (int)STRLEN(command) + 3;
+	else
+	    len = 30;
+	p = alloc(len);
+	if (p != NULL)
+	{
+	    if (command != NULL)
+		vim_snprintf((char *)p, len, ":%s\r", command);
+	    else
+		vim_snprintf((char *)p, len, "%ldG", (long)newlnum);
+	    set_vim_var_string(VV_SWAPCOMMAND, p, -1);
+	    did_set_swapcommand = TRUE;
+	    vim_free(p);
+	}
+    }
+#endif
+
+    /*
+     * If we are starting to edit another file, open a (new) buffer.
+     * Otherwise we re-use the current buffer.
+     */
+    if (other_file)
+    {
+	int prev_alt_fnum = curwin->w_alt_fnum;
+
+	if (!(flags & (ECMD_ADDBUF | ECMD_ALTBUF)))
+	{
+	    if ((cmdmod.cmod_flags & CMOD_KEEPALT) == 0)
+		curwin->w_alt_fnum = curbuf->b_fnum;
+	    if (oldwin != NULL)
+		buflist_altfpos(oldwin);
+	}
+
+	if (fnum)
+	    buf = buflist_findnr(fnum);
+	else
+	{
+	    if (flags & (ECMD_ADDBUF | ECMD_ALTBUF))
+	    {
+		// Default the line number to zero to avoid that a wininfo item
+		// is added for the current window.
+		linenr_T	tlnum = 0;
+		buf_T		*newbuf;
+
+		if (command != NULL)
+		{
+		    tlnum = atol((char *)command);
+		    if (tlnum <= 0)
+			tlnum = 1L;
+		}
+		// Add BLN_NOCURWIN to avoid a new wininfo items are associated
+		// with the current window.
+		newbuf = buflist_new(ffname, sfname, tlnum,
+						    BLN_LISTED | BLN_NOCURWIN);
+		if (newbuf != NULL)
+		{
+		    if (flags & ECMD_ALTBUF)
+			curwin->w_alt_fnum = newbuf->b_fnum;
+		    if (tlnum > 0)
+			newbuf->b_last_cursor.lnum = tlnum;
+		}
+		goto theend;
+	    }
+	    buf = buflist_new(ffname, sfname, 0L,
+		    BLN_CURBUF | ((flags & ECMD_SET_HELP) ? 0 : BLN_LISTED));
+
+	    // autocommands may change curwin and curbuf
+	    if (oldwin != NULL)
+		oldwin = curwin;
+	    set_bufref(&old_curbuf, curbuf);
+	}
+	if (buf == NULL)
+	    goto theend;
+	if (curwin->w_alt_fnum == buf->b_fnum && prev_alt_fnum != 0)
+	    // reusing the buffer, keep the old alternate file
+	    curwin->w_alt_fnum = prev_alt_fnum;
+
+	if (buf->b_ml.ml_mfp == NULL)		// no memfile yet
+	{
+	    oldbuf = FALSE;
+	}
+	else					// existing memfile
+	{
+	    oldbuf = TRUE;
+	    set_bufref(&bufref, buf);
+	    (void)buf_check_timestamp(buf, FALSE);
+	    // Check if autocommands made the buffer invalid or changed the
+	    // current buffer.
+	    if (!bufref_valid(&bufref) || curbuf != old_curbuf.br_buf)
+		goto theend;
+#ifdef FEAT_EVAL
+	    if (aborting())	    // autocmds may abort script processing
+		goto theend;
+#endif
+	}
+
+	// May jump to last used line number for a loaded buffer or when asked
+	// for explicitly
+	if ((oldbuf && newlnum == ECMD_LASTL) || newlnum == ECMD_LAST)
+	{
+	    pos = buflist_findfpos(buf);
+	    newlnum = pos->lnum;
+	    solcol = pos->col;
+	}
+
+	/*
+	 * Make the (new) buffer the one used by the current window.
+	 * If the old buffer becomes unused, free it if ECMD_HIDE is FALSE.
+	 * If the current buffer was empty and has no file name, curbuf
+	 * is returned by buflist_new(), nothing to do here.
+	 */
+	if (buf != curbuf)
+	{
+	    bufref_T	save_au_new_curbuf;
+	    int		save_cmdwin_type = cmdwin_type;
+
+	    // BufLeave applies to the old buffer.
+	    cmdwin_type = 0;
+
+	    /*
+	     * Be careful: The autocommands may delete any buffer and change
+	     * the current buffer.
+	     * - If the buffer we are going to edit is deleted, give up.
+	     * - If the current buffer is deleted, prefer to load the new
+	     *   buffer when loading a buffer is required.  This avoids
+	     *   loading another buffer which then must be closed again.
+	     * - If we ended up in the new buffer already, need to skip a few
+	     *	 things, set auto_buf.
+	     */
+	    if (buf->b_fname != NULL)
+		new_name = vim_strsave(buf->b_fname);
+	    save_au_new_curbuf = au_new_curbuf;
+	    set_bufref(&au_new_curbuf, buf);
+	    apply_autocmds(EVENT_BUFLEAVE, NULL, NULL, FALSE, curbuf);
+	    cmdwin_type = save_cmdwin_type;
+	    if (!bufref_valid(&au_new_curbuf))
+	    {
+		// new buffer has been deleted
+		delbuf_msg(new_name);	// frees new_name
+		au_new_curbuf = save_au_new_curbuf;
+		goto theend;
+	    }
+#ifdef FEAT_EVAL
+	    if (aborting())	    // autocmds may abort script processing
+	    {
+		vim_free(new_name);
+		au_new_curbuf = save_au_new_curbuf;
+		goto theend;
+	    }
+#endif
+	    if (buf == curbuf)		// already in new buffer
+		auto_buf = TRUE;
+	    else
+	    {
+		win_T	    *the_curwin = curwin;
+		int	    did_decrement;
+		buf_T	    *was_curbuf = curbuf;
+
+		// Set the w_closing flag to avoid that autocommands close the
+		// window.  And set b_locked for the same reason.
+		the_curwin->w_closing = TRUE;
+		++buf->b_locked;
+
+		if (curbuf == old_curbuf.br_buf)
+		    buf_copy_options(buf, BCO_ENTER);
+
+		// Close the link to the current buffer. This will set
+		// oldwin->w_buffer to NULL.
+		u_sync(FALSE);
+		did_decrement = close_buffer(oldwin, curbuf,
+			 (flags & ECMD_HIDE) ? 0 : DOBUF_UNLOAD, FALSE, FALSE);
+
+		// Autocommands may have closed the window.
+		if (win_valid(the_curwin))
+		    the_curwin->w_closing = FALSE;
+		--buf->b_locked;
+
+#ifdef FEAT_EVAL
+		// autocmds may abort script processing
+		if (aborting() && curwin->w_buffer != NULL)
+		{
+		    vim_free(new_name);
+		    au_new_curbuf = save_au_new_curbuf;
+		    goto theend;
+		}
+#endif
+		// Be careful again, like above.
+		if (!bufref_valid(&au_new_curbuf))
+		{
+		    // new buffer has been deleted
+		    delbuf_msg(new_name);	// frees new_name
+		    au_new_curbuf = save_au_new_curbuf;
+		    goto theend;
+		}
+		if (buf == curbuf)		// already in new buffer
+		{
+		    // close_buffer() has decremented the window count,
+		    // increment it again here and restore w_buffer.
+		    if (did_decrement && buf_valid(was_curbuf))
+			++was_curbuf->b_nwindows;
+		    if (win_valid_any_tab(oldwin) && oldwin->w_buffer == NULL)
+			oldwin->w_buffer = was_curbuf;
+		    auto_buf = TRUE;
+		}
+		else
+		{
+#ifdef FEAT_SYN_HL
+		    /*
+		     * <VN> We could instead free the synblock
+		     * and re-attach to buffer, perhaps.
+		     */
+		    if (curwin->w_buffer == NULL
+			    || curwin->w_s == &(curwin->w_buffer->b_s))
+			curwin->w_s = &(buf->b_s);
+#endif
+		    curwin->w_buffer = buf;
+		    curbuf = buf;
+		    ++curbuf->b_nwindows;
+
+		    // Set 'fileformat', 'binary' and 'fenc' when forced.
+		    if (!oldbuf && eap != NULL)
+		    {
+			set_file_options(TRUE, eap);
+			set_forced_fenc(eap);
+		    }
+		}
+
+		// May get the window options from the last time this buffer
+		// was in this window (or another window).  If not used
+		// before, reset the local window options to the global
+		// values.  Also restores old folding stuff.
+		get_winopts(curbuf);
+#ifdef FEAT_SPELL
+		did_get_winopts = TRUE;
+#endif
+	    }
+	    vim_free(new_name);
+	    au_new_curbuf = save_au_new_curbuf;
+	}
+
+	curwin->w_pcmark.lnum = 1;
+	curwin->w_pcmark.col = 0;
+    }
+    else // !other_file
+    {
+	if ((flags & (ECMD_ADDBUF | ECMD_ALTBUF)) || check_fname() == FAIL)
+	    goto theend;
+
+	oldbuf = (flags & ECMD_OLDBUF);
+    }
+
+    // Don't redraw until the cursor is in the right line, otherwise
+    // autocommands may cause ml_get errors.
+    ++RedrawingDisabled;
+    did_inc_redrawing_disabled = TRUE;
+
+    buf = curbuf;
+    if ((flags & ECMD_SET_HELP) || keep_help_flag)
+    {
+	prepare_help_buffer();
+    }
+    else
+    {
+	// Don't make a buffer listed if it's a help buffer.  Useful when
+	// using CTRL-O to go back to a help file.
+	if (!curbuf->b_help)
+	    set_buflisted(TRUE);
+    }
+
+    // If autocommands change buffers under our fingers, forget about
+    // editing the file.
+    if (buf != curbuf)
+	goto theend;
+#ifdef FEAT_EVAL
+    if (aborting())	    // autocmds may abort script processing
+	goto theend;
+#endif
+
+    // Since we are starting to edit a file, consider the filetype to be
+    // unset.  Helps for when an autocommand changes files and expects syntax
+    // highlighting to work in the other file.
+    did_filetype = FALSE;
+
+/*
+ * other_file	oldbuf
+ *  FALSE	FALSE	    re-edit same file, buffer is re-used
+ *  FALSE	TRUE	    re-edit same file, nothing changes
+ *  TRUE	FALSE	    start editing new file, new buffer
+ *  TRUE	TRUE	    start editing in existing buffer (nothing to do)
+ */
+    if (!other_file && !oldbuf)		// re-use the buffer
+    {
+	set_last_cursor(curwin);	// may set b_last_cursor
+	if (newlnum == ECMD_LAST || newlnum == ECMD_LASTL)
+	{
+	    newlnum = curwin->w_cursor.lnum;
+	    solcol = curwin->w_cursor.col;
+	}
+	buf = curbuf;
+	if (buf->b_fname != NULL)
+	    new_name = vim_strsave(buf->b_fname);
+	else
+	    new_name = NULL;
+	set_bufref(&bufref, buf);
+
+	// If the buffer was used before, store the current contents so that
+	// the reload can be undone.  Do not do this if the (empty) buffer is
+	// being re-used for another file.
+	if (!(curbuf->b_flags & BF_NEVERLOADED)
+		&& (p_ur < 0 || curbuf->b_ml.ml_line_count <= p_ur))
+	{
+	    // Sync first so that this is a separate undo-able action.
+	    u_sync(FALSE);
+	    if (u_savecommon(0, curbuf->b_ml.ml_line_count + 1, 0, TRUE)
+								     == FAIL)
+	    {
+		vim_free(new_name);
+		goto theend;
+	    }
+	    u_unchanged(curbuf);
+	    buf_freeall(curbuf, BFA_KEEP_UNDO);
+
+	    // tell readfile() not to clear or reload undo info
+	    readfile_flags = READ_KEEP_UNDO;
+	}
+	else
+	    buf_freeall(curbuf, 0);   // free all things for buffer
+
+	// If autocommands deleted the buffer we were going to re-edit, give
+	// up and jump to the end.
+	if (!bufref_valid(&bufref))
+	{
+	    delbuf_msg(new_name);	// frees new_name
+	    goto theend;
+	}
+	vim_free(new_name);
+
+	// If autocommands change buffers under our fingers, forget about
+	// re-editing the file.  Should do the buf_clear_file(), but perhaps
+	// the autocommands changed the buffer...
+	if (buf != curbuf)
+	    goto theend;
+#ifdef FEAT_EVAL
+	if (aborting())	    // autocmds may abort script processing
+	    goto theend;
+#endif
+	buf_clear_file(curbuf);
+	curbuf->b_op_start.lnum = 0;	// clear '[ and '] marks
+	curbuf->b_op_end.lnum = 0;
+    }
+
+/*
+ * If we get here we are sure to start editing
+ */
+    // Assume success now
+    retval = OK;
+
+    // If the file name was changed, reset the not-edit flag so that ":write"
+    // works.
+    if (!other_file)
+	curbuf->b_flags &= ~BF_NOTEDITED;
+
+    /*
+     * Check if we are editing the w_arg_idx file in the argument list.
+     */
+    check_arg_idx(curwin);
+
+    if (!auto_buf)
+    {
+	/*
+	 * Set cursor and init window before reading the file and executing
+	 * autocommands.  This allows for the autocommands to position the
+	 * cursor.
+	 */
+	curwin_init();
+
+#ifdef FEAT_FOLDING
+	// It's possible that all lines in the buffer changed.  Need to update
+	// automatic folding for all windows where it's used.
+	{
+	    win_T	    *win;
+	    tabpage_T	    *tp;
+
+	    FOR_ALL_TAB_WINDOWS(tp, win)
+		if (win->w_buffer == curbuf)
+		    foldUpdateAll(win);
+	}
+#endif
+
+	// Change directories when the 'acd' option is set.
+	DO_AUTOCHDIR;
+
+	/*
+	 * Careful: open_buffer() and apply_autocmds() may change the current
+	 * buffer and window.
+	 */
+	orig_pos = curwin->w_cursor;
+	topline = curwin->w_topline;
+	if (!oldbuf)			    // need to read the file
+	{
+#ifdef FEAT_PROP_POPUP
+	    // Don't use the swap-exists dialog for a popup window, can't edit
+	    // the buffer.
+	    if (WIN_IS_POPUP(curwin))
+		curbuf->b_flags |= BF_NO_SEA;
+#endif
+	    swap_exists_action = SEA_DIALOG;
+	    curbuf->b_flags |= BF_CHECK_RO; // set/reset 'ro' flag
+
+	    /*
+	     * Open the buffer and read the file.
+	     */
+	    if (flags & ECMD_NOWINENTER)
+		readfile_flags |= READ_NOWINENTER;
+#if defined(FEAT_EVAL)
+	    if (should_abort(open_buffer(FALSE, eap, readfile_flags)))
+		retval = FAIL;
+#else
+	    (void)open_buffer(FALSE, eap, readfile_flags);
+#endif
+
+#ifdef FEAT_PROP_POPUP
+	    curbuf->b_flags &= ~BF_NO_SEA;
+#endif
+	    if (swap_exists_action == SEA_QUIT)
+		retval = FAIL;
+	    handle_swap_exists(&old_curbuf);
+	}
+	else
+	{
+	    // Read the modelines, but only to set window-local options.  Any
+	    // buffer-local options have already been set and may have been
+	    // changed by the user.
+	    do_modelines(OPT_WINONLY);
+
+	    apply_autocmds_retval(EVENT_BUFENTER, NULL, NULL, FALSE,
+							      curbuf, &retval);
+	    if ((flags & ECMD_NOWINENTER) == 0)
+		apply_autocmds_retval(EVENT_BUFWINENTER, NULL, NULL, FALSE,
+							      curbuf, &retval);
+	}
+	check_arg_idx(curwin);
+
+	// If autocommands change the cursor position or topline, we should
+	// keep it.  Also when it moves within a line. But not when it moves
+	// to the first non-blank.
+	if (!EQUAL_POS(curwin->w_cursor, orig_pos))
+	{
+	    char_u *text = ml_get_curline();
+
+	    if (curwin->w_cursor.lnum != orig_pos.lnum
+		    || curwin->w_cursor.col != (int)(skipwhite(text) - text))
+	    {
+		newlnum = curwin->w_cursor.lnum;
+		newcol = curwin->w_cursor.col;
+	    }
+	}
+	if (curwin->w_topline == topline)
+	    topline = 0;
+
+	// Even when cursor didn't move we need to recompute topline.
+	changed_line_abv_curs();
+
+	maketitle();
+#if defined(FEAT_PROP_POPUP) && defined(FEAT_QUICKFIX)
+	if (WIN_IS_POPUP(curwin) && curwin->w_p_pvw && retval != FAIL)
+	    popup_set_title(curwin);
+#endif
+    }
+
+#ifdef FEAT_DIFF
+    // Tell the diff stuff that this buffer is new and/or needs updating.
+    // Also needed when re-editing the same buffer, because unloading will
+    // have removed it as a diff buffer.
+    if (curwin->w_p_diff)
+    {
+	diff_buf_add(curbuf);
+	diff_invalidate(curbuf);
+    }
+#endif
+
+#ifdef FEAT_SPELL
+    // If the window options were changed may need to set the spell language.
+    // Can only do this after the buffer has been properly setup.
+    if (did_get_winopts && curwin->w_p_spell && *curwin->w_s->b_p_spl != NUL)
+	(void)parse_spelllang(curwin);
+#endif
+
+    if (command == NULL)
+    {
+	if (newcol >= 0)	// position set by autocommands
+	{
+	    curwin->w_cursor.lnum = newlnum;
+	    curwin->w_cursor.col = newcol;
+	    check_cursor();
+	}
+	else if (newlnum > 0)	// line number from caller or old position
+	{
+	    curwin->w_cursor.lnum = newlnum;
+	    check_cursor_lnum();
+	    if (solcol >= 0 && !p_sol)
+	    {
+		// 'sol' is off: Use last known column.
+		curwin->w_cursor.col = solcol;
+		check_cursor_col();
+		curwin->w_cursor.coladd = 0;
+		curwin->w_set_curswant = TRUE;
+	    }
+	    else
+		beginline(BL_SOL | BL_FIX);
+	}
+	else			// no line number, go to last line in Ex mode
+	{
+	    if (exmode_active)
+		curwin->w_cursor.lnum = curbuf->b_ml.ml_line_count;
+	    beginline(BL_WHITE | BL_FIX);
+	}
+    }
+
+    // Check if cursors in other windows on the same buffer are still valid
+    check_lnums(FALSE);
+
+    /*
+     * Did not read the file, need to show some info about the file.
+     * Do this after setting the cursor.
+     */
+    if (oldbuf && !auto_buf)
+    {
+	int	msg_scroll_save = msg_scroll;
+
+	// Obey the 'O' flag in 'cpoptions': overwrite any previous file
+	// message.
+	if (shortmess(SHM_OVERALL) && !exiting && p_verbose == 0)
+	    msg_scroll = FALSE;
+	if (!msg_scroll)	// wait a bit when overwriting an error msg
+	    check_for_delay(FALSE);
+	msg_start();
+	msg_scroll = msg_scroll_save;
+	msg_scrolled_ign = TRUE;
+
+	if (!shortmess(SHM_FILEINFO))
+	    fileinfo(FALSE, TRUE, FALSE);
+
+	msg_scrolled_ign = FALSE;
+    }
+
+#ifdef FEAT_VIMINFO
+    curbuf->b_last_used = vim_time();
+#endif
+
+    if (command != NULL)
+	do_cmdline(command, NULL, NULL, DOCMD_VERBOSE|DOCMD_RANGEOK);
+
+#ifdef FEAT_KEYMAP
+    if (curbuf->b_kmap_state & KEYMAP_INIT)
+	(void)keymap_init();
+#endif
+
+    --RedrawingDisabled;
+    did_inc_redrawing_disabled = FALSE;
+    if (!skip_redraw)
+    {
+	n = *so_ptr;
+	if (topline == 0 && command == NULL)
+	    *so_ptr = 9999;		// force cursor halfway the window
+	update_topline();
+	curwin->w_scbind_pos = curwin->w_topline;
+	*so_ptr = n;
+	redraw_curbuf_later(UPD_NOT_VALID);	// redraw this buffer later
+    }
+
+    if (p_im && (State & MODE_INSERT) == 0)
+	need_start_insertmode = TRUE;
+
+#ifdef FEAT_AUTOCHDIR
+    // Change directories when the 'acd' option is set and we aren't already in
+    // that directory (should already be done above). Expect getcwd() to be
+    // faster than calling shorten_fnames() unnecessarily.
+    if (p_acd && curbuf->b_ffname != NULL)
+    {
+	char_u	curdir[MAXPATHL];
+	char_u	filedir[MAXPATHL];
+
+	vim_strncpy(filedir, curbuf->b_ffname, MAXPATHL - 1);
+	*gettail_sep(filedir) = NUL;
+	if (mch_dirname(curdir, MAXPATHL) != FAIL
+		&& vim_fnamecmp(curdir, filedir) != 0)
+	    do_autochdir();
+    }
+#endif
+
+#if defined(FEAT_NETBEANS_INTG)
+    if (curbuf->b_ffname != NULL)
+    {
+# ifdef FEAT_NETBEANS_INTG
+	if ((flags & ECMD_SET_HELP) != ECMD_SET_HELP)
+	    netbeans_file_opened(curbuf);
+# endif
+    }
+#endif
+
+theend:
+    if (did_inc_redrawing_disabled)
+	--RedrawingDisabled;
+#if defined(FEAT_EVAL)
+    if (did_set_swapcommand)
+	set_vim_var_string(VV_SWAPCOMMAND, NULL, -1);
+#endif
+#ifdef FEAT_BROWSE
+    vim_free(browse_file);
+#endif
+    vim_free(free_fname);
+    return retval;
+}
+
+    static void
+delbuf_msg(char_u *name)
+{
+    semsg(_(e_autocommands_unexpectedly_deleted_new_buffer_str),
+					   name == NULL ? (char_u *)"" : name);
+    vim_free(name);
+    au_new_curbuf.br_buf = NULL;
+    au_new_curbuf.br_buf_free_count = 0;
+}
+
+static int append_indent = 0;	    // autoindent for first line
+
+/*
+ * ":insert" and ":append", also used by ":change"
+ */
+    void
+ex_append(exarg_T *eap)
+{
+    char_u	*theline;
+    int		did_undo = FALSE;
+    linenr_T	lnum = eap->line2;
+    int		indent = 0;
+    char_u	*p;
+    int		vcol;
+    int		empty = (curbuf->b_ml.ml_flags & ML_EMPTY);
+
+#ifdef FEAT_EVAL
+    if (not_in_vim9(eap) == FAIL)
+	return;
+#endif
+    // the ! flag toggles autoindent
+    if (eap->forceit)
+	curbuf->b_p_ai = !curbuf->b_p_ai;
+
+    // First autoindent comes from the line we start on
+    if (eap->cmdidx != CMD_change && curbuf->b_p_ai && lnum > 0)
+	append_indent = get_indent_lnum(lnum);
+
+    if (eap->cmdidx != CMD_append)
+	--lnum;
+
+    // when the buffer is empty need to delete the dummy line
+    if (empty && lnum == 1)
+	lnum = 0;
+
+    State = MODE_INSERT;		    // behave like in Insert mode
+    if (curbuf->b_p_iminsert == B_IMODE_LMAP)
+	State |= MODE_LANGMAP;
+
+    for (;;)
+    {
+	msg_scroll = TRUE;
+	need_wait_return = FALSE;
+	if (curbuf->b_p_ai)
+	{
+	    if (append_indent >= 0)
+	    {
+		indent = append_indent;
+		append_indent = -1;
+	    }
+	    else if (lnum > 0)
+		indent = get_indent_lnum(lnum);
+	}
+	ex_keep_indent = FALSE;
+	if (eap->getline == NULL)
+	{
+	    // No getline() function, use the lines that follow. This ends
+	    // when there is no more.
+	    if (eap->nextcmd == NULL || *eap->nextcmd == NUL)
+		break;
+	    p = vim_strchr(eap->nextcmd, NL);
+	    if (p == NULL)
+		p = eap->nextcmd + STRLEN(eap->nextcmd);
+	    theline = vim_strnsave(eap->nextcmd, p - eap->nextcmd);
+	    if (*p != NUL)
+		++p;
+	    eap->nextcmd = p;
+	}
+	else
+	{
+	    int save_State = State;
+
+	    // Set State to avoid the cursor shape to be set to MODE_INSERT
+	    // state when getline() returns.
+	    State = MODE_CMDLINE;
+	    theline = eap->getline(
+#ifdef FEAT_EVAL
+		    eap->cstack->cs_looplevel > 0 ? -1 :
+#endif
+		    NUL, eap->cookie, indent, TRUE);
+	    State = save_State;
+	}
+	lines_left = Rows - 1;
+	if (theline == NULL)
+	    break;
+
+	// Using ^ CTRL-D in getexmodeline() makes us repeat the indent.
+	if (ex_keep_indent)
+	    append_indent = indent;
+
+	// Look for the "." after automatic indent.
+	vcol = 0;
+	for (p = theline; indent > vcol; ++p)
+	{
+	    if (*p == ' ')
+		++vcol;
+	    else if (*p == TAB)
+		vcol += 8 - vcol % 8;
+	    else
+		break;
+	}
+	if ((p[0] == '.' && p[1] == NUL)
+		|| (!did_undo && u_save(lnum, lnum + 1 + (empty ? 1 : 0))
+								     == FAIL))
+	{
+	    vim_free(theline);
+	    break;
+	}
+
+	// don't use autoindent if nothing was typed.
+	if (p[0] == NUL)
+	    theline[0] = NUL;
+
+	did_undo = TRUE;
+	ml_append(lnum, theline, (colnr_T)0, FALSE);
+	if (empty)
+	    // there are no marks below the inserted lines
+	    appended_lines(lnum, 1L);
+	else
+	    appended_lines_mark(lnum, 1L);
+
+	vim_free(theline);
+	++lnum;
+
+	if (empty)
+	{
+	    ml_delete(2L);
+	    empty = FALSE;
+	}
+    }
+    State = MODE_NORMAL;
+
+    if (eap->forceit)
+	curbuf->b_p_ai = !curbuf->b_p_ai;
+
+    // "start" is set to eap->line2+1 unless that position is invalid (when
+    // eap->line2 pointed to the end of the buffer and nothing was appended)
+    // "end" is set to lnum when something has been appended, otherwise
+    // it is the same as "start"  -- Acevedo
+    if ((cmdmod.cmod_flags & CMOD_LOCKMARKS) == 0)
+    {
+	curbuf->b_op_start.lnum = (eap->line2 < curbuf->b_ml.ml_line_count) ?
+	    eap->line2 + 1 : curbuf->b_ml.ml_line_count;
+	if (eap->cmdidx != CMD_append)
+	    --curbuf->b_op_start.lnum;
+	curbuf->b_op_end.lnum = (eap->line2 < lnum)
+					      ? lnum : curbuf->b_op_start.lnum;
+	curbuf->b_op_start.col = curbuf->b_op_end.col = 0;
+    }
+    curwin->w_cursor.lnum = lnum;
+    check_cursor_lnum();
+    beginline(BL_SOL | BL_FIX);
+
+    need_wait_return = FALSE;	// don't use wait_return() now
+    ex_no_reprint = TRUE;
+}
+
+/*
+ * ":change"
+ */
+    void
+ex_change(exarg_T *eap)
+{
+    linenr_T	lnum;
+
+#ifdef FEAT_EVAL
+    if (not_in_vim9(eap) == FAIL)
+	return;
+#endif
+    if (eap->line2 >= eap->line1
+	    && u_save(eap->line1 - 1, eap->line2 + 1) == FAIL)
+	return;
+
+    // the ! flag toggles autoindent
+    if (eap->forceit ? !curbuf->b_p_ai : curbuf->b_p_ai)
+	append_indent = get_indent_lnum(eap->line1);
+
+    for (lnum = eap->line2; lnum >= eap->line1; --lnum)
+    {
+	if (curbuf->b_ml.ml_flags & ML_EMPTY)	    // nothing to delete
+	    break;
+	ml_delete(eap->line1);
+    }
+
+    // make sure the cursor is not beyond the end of the file now
+    check_cursor_lnum();
+    deleted_lines_mark(eap->line1, (long)(eap->line2 - lnum));
+
+    // ":append" on the line above the deleted lines.
+    eap->line2 = eap->line1;
+    ex_append(eap);
+}
+
+    void
+ex_z(exarg_T *eap)
+{
+    char_u	*x;
+    long	bigness;
+    char_u	*kind;
+    int		minus = 0;
+    linenr_T	start, end, curs, i;
+    int		j;
+    linenr_T	lnum = eap->line2;
+
+    // Vi compatible: ":z!" uses display height, without a count uses
+    // 'scroll'
+    if (eap->forceit)
+	bigness = Rows - 1;
+    else if (!ONE_WINDOW)
+	bigness = curwin->w_height - 3;
+    else
+	bigness = curwin->w_p_scr * 2;
+    if (bigness < 1)
+	bigness = 1;
+
+    x = eap->arg;
+    kind = x;
+    if (*kind == '-' || *kind == '+' || *kind == '='
+					      || *kind == '^' || *kind == '.')
+	++x;
+    while (*x == '-' || *x == '+')
+	++x;
+
+    if (*x != 0)
+    {
+	if (!VIM_ISDIGIT(*x))
+	{
+	    emsg(_(e_non_numeric_argument_to_z));
+	    return;
+	}
+	else
+	{
+	    bigness = atol((char *)x);
+
+	    // bigness could be < 0 if atol(x) overflows.
+	    if (bigness > 2 * curbuf->b_ml.ml_line_count || bigness < 0)
+		bigness = 2 * curbuf->b_ml.ml_line_count;
+
+	    p_window = bigness;
+	    if (*kind == '=')
+		bigness += 2;
+	}
+    }
+
+    // the number of '-' and '+' multiplies the distance
+    if (*kind == '-' || *kind == '+')
+	for (x = kind + 1; *x == *kind; ++x)
+	    ;
+
+    switch (*kind)
+    {
+	case '-':
+	    start = lnum - bigness * (linenr_T)(x - kind) + 1;
+	    end = start + bigness - 1;
+	    curs = end;
+	    break;
+
+	case '=':
+	    start = lnum - (bigness + 1) / 2 + 1;
+	    end = lnum + (bigness + 1) / 2 - 1;
+	    curs = lnum;
+	    minus = 1;
+	    break;
+
+	case '^':
+	    start = lnum - bigness * 2;
+	    end = lnum - bigness;
+	    curs = lnum - bigness;
+	    break;
+
+	case '.':
+	    start = lnum - (bigness + 1) / 2 + 1;
+	    end = lnum + (bigness + 1) / 2 - 1;
+	    curs = end;
+	    break;
+
+	default:  // '+'
+	    start = lnum;
+	    if (*kind == '+')
+		start += bigness * (linenr_T)(x - kind - 1) + 1;
+	    else if (eap->addr_count == 0)
+		++start;
+	    end = start + bigness - 1;
+	    curs = end;
+	    break;
+    }
+
+    if (start < 1)
+	start = 1;
+
+    if (end > curbuf->b_ml.ml_line_count)
+	end = curbuf->b_ml.ml_line_count;
+
+    if (curs > curbuf->b_ml.ml_line_count)
+	curs = curbuf->b_ml.ml_line_count;
+    else if (curs < 1)
+	curs = 1;
+
+    for (i = start; i <= end; i++)
+    {
+	if (minus && i == lnum)
+	{
+	    msg_putchar('\n');
+
+	    for (j = 1; j < Columns; j++)
+		msg_putchar('-');
+	}
+
+	print_line(i, eap->flags & EXFLAG_NR, eap->flags & EXFLAG_LIST);
+
+	if (minus && i == lnum)
+	{
+	    msg_putchar('\n');
+
+	    for (j = 1; j < Columns; j++)
+		msg_putchar('-');
+	}
+    }
+
+    if (curwin->w_cursor.lnum != curs)
+    {
+	curwin->w_cursor.lnum = curs;
+	curwin->w_cursor.col = 0;
+    }
+    ex_no_reprint = TRUE;
+}
+
+/*
+ * Check if the restricted flag is set.
+ * If so, give an error message and return TRUE.
+ * Otherwise, return FALSE.
+ */
+    int
+check_restricted(void)
+{
+    if (restricted)
+    {
+	emsg(_(e_shell_commands_and_some_functionality_not_allowed_in_rvim));
+	return TRUE;
+    }
+    return FALSE;
+}
+
+/*
+ * Check if the secure flag is set (.exrc or .vimrc in current directory).
+ * If so, give an error message and return TRUE.
+ * Otherwise, return FALSE.
+ */
+    int
+check_secure(void)
+{
+    if (secure)
+    {
+	secure = 2;
+	emsg(_(e_command_not_allowed_from_vimrc_in_current_dir_or_tag_search));
+	return TRUE;
+    }
+#ifdef HAVE_SANDBOX
+    /*
+     * In the sandbox more things are not allowed, including the things
+     * disallowed in secure mode.
+     */
+    if (sandbox != 0)
+    {
+	emsg(_(e_not_allowed_in_sandbox));
+	return TRUE;
+    }
+#endif
+    return FALSE;
+}
+
+static char_u	*old_sub = NULL;	// previous substitute pattern
+static int	global_need_beginline;	// call beginline() after ":g"
+
+/*
+ * Flags that are kept between calls to :substitute.
+ */
+typedef struct {
+    int	do_all;		// do multiple substitutions per line
+    int	do_ask;		// ask for confirmation
+    int	do_count;	// count only
+    int	do_error;	// if false, ignore errors
+    int	do_print;	// print last line with subs.
+    int	do_list;	// list last line with subs.
+    int	do_number;	// list last line with line nr
+    int	do_ic;		// ignore case flag
+} subflags_T;
+
+/*
+ * Skip over the "sub" part in :s/pat/sub/ where "delimiter" is the separating
+ * character.
+ */
+    char_u *
+skip_substitute(char_u *start, int delimiter)
+{
+    char_u *p = start;
+
+    while (p[0])
+    {
+	if (p[0] == delimiter)		// end delimiter found
+	{
+	    *p++ = NUL;			// replace it with a NUL
+	    break;
+	}
+	if (p[0] == '\\' && p[1] != 0)	// skip escaped characters
+	    ++p;
+	MB_PTR_ADV(p);
+    }
+    return p;
+}
+
+    static int
+check_regexp_delim(int c)
+{
+    if (isalpha(c))
+    {
+	emsg(_(e_regular_expressions_cant_be_delimited_by_letters));
+	return FAIL;
+    }
+    return OK;
+}
+
+/*
+ * Perform a substitution from line eap->line1 to line eap->line2 using the
+ * command pointed to by eap->arg which should be of the form:
+ *
+ * /pattern/substitution/{flags}
+ *
+ * The usual escapes are supported as described in the regexp docs.
+ */
+    void
+ex_substitute(exarg_T *eap)
+{
+    linenr_T	lnum;
+    long	i = 0;
+    regmmatch_T regmatch;
+    static subflags_T subflags = {FALSE, FALSE, FALSE, TRUE, FALSE,
+							      FALSE, FALSE, 0};
+#ifdef FEAT_EVAL
+    subflags_T	subflags_save;
+#endif
+    int		save_do_all;		// remember user specified 'g' flag
+    int		save_do_ask;		// remember user specified 'c' flag
+    char_u	*pat = NULL, *sub = NULL;	// init for GCC
+    char_u	*sub_copy = NULL;
+    int		delimiter;
+    int		sublen;
+    int		got_quit = FALSE;
+    int		got_match = FALSE;
+    int		temp;
+    int		which_pat;
+    char_u	*cmd;
+    int		save_State;
+    linenr_T	first_line = 0;		// first changed line
+    linenr_T	last_line= 0;		// below last changed line AFTER the
+					// change
+    linenr_T	old_line_count = curbuf->b_ml.ml_line_count;
+    linenr_T	line2;
+    long	nmatch;			// number of lines in match
+    char_u	*sub_firstline;		// allocated copy of first sub line
+    int		endcolumn = FALSE;	// cursor in last column when done
+    pos_T	old_cursor = curwin->w_cursor;
+    int		start_nsubs;
+#ifdef FEAT_EVAL
+    int		save_ma = 0;
+    int		save_sandbox = 0;
+#endif
+#ifdef FEAT_PROP_POPUP
+    textprop_T	*text_props = NULL;
+#endif
+
+    cmd = eap->arg;
+    if (!global_busy)
+    {
+	sub_nsubs = 0;
+	sub_nlines = 0;
+    }
+    start_nsubs = sub_nsubs;
+
+    if (eap->cmdidx == CMD_tilde)
+	which_pat = RE_LAST;	// use last used regexp
+    else
+	which_pat = RE_SUBST;	// use last substitute regexp
+
+				// new pattern and substitution
+    if (eap->cmd[0] == 's' && *cmd != NUL && !VIM_ISWHITE(*cmd)
+		&& vim_strchr((char_u *)"0123456789cegriIp|\"", *cmd) == NULL)
+    {
+				// don't accept alphanumeric for separator
+	if (check_regexp_delim(*cmd) == FAIL)
+	    return;
+#ifdef FEAT_EVAL
+	if (in_vim9script() && check_global_and_subst(eap->cmd, eap->arg)
+								      == FAIL)
+	    return;
+#endif
+
+	/*
+	 * undocumented vi feature:
+	 *  "\/sub/" and "\?sub?" use last used search pattern (almost like
+	 *  //sub/r).  "\&sub&" use last substitute pattern (like //sub/).
+	 */
+	if (*cmd == '\\')
+	{
+	    if (in_vim9script())
+	    {
+		emsg(_(e_cannot_use_s_backslash_in_vim9_script));
+		return;
+	    }
+	    ++cmd;
+	    if (vim_strchr((char_u *)"/?&", *cmd) == NULL)
+	    {
+		emsg(_(e_backslash_should_be_followed_by));
+		return;
+	    }
+	    if (*cmd != '&')
+		which_pat = RE_SEARCH;	    // use last '/' pattern
+	    pat = (char_u *)"";		    // empty search pattern
+	    delimiter = *cmd++;		    // remember delimiter character
+	}
+	else		// find the end of the regexp
+	{
+	    which_pat = RE_LAST;	    // use last used regexp
+	    delimiter = *cmd++;		    // remember delimiter character
+	    pat = cmd;			    // remember start of search pat
+	    cmd = skip_regexp_ex(cmd, delimiter, magic_isset(),
+							&eap->arg, NULL, NULL);
+	    if (cmd[0] == delimiter)	    // end delimiter found
+		*cmd++ = NUL;		    // replace it with a NUL
+	}
+
+	/*
+	 * Small incompatibility: vi sees '\n' as end of the command, but in
+	 * Vim we want to use '\n' to find/substitute a NUL.
+	 */
+	sub = cmd;	    // remember the start of the substitution
+	cmd = skip_substitute(cmd, delimiter);
+
+	if (!eap->skip)
+	{
+	    // In POSIX vi ":s/pat/%/" uses the previous subst. string.
+	    if (STRCMP(sub, "%") == 0
+				 && vim_strchr(p_cpo, CPO_SUBPERCENT) != NULL)
+	    {
+		if (old_sub == NULL)	// there is no previous command
+		{
+		    emsg(_(e_no_previous_substitute_regular_expression));
+		    return;
+		}
+		sub = old_sub;
+	    }
+	    else
+	    {
+		vim_free(old_sub);
+		old_sub = vim_strsave(sub);
+	    }
+	}
+    }
+    else if (!eap->skip)	// use previous pattern and substitution
+    {
+	if (old_sub == NULL)	// there is no previous command
+	{
+	    emsg(_(e_no_previous_substitute_regular_expression));
+	    return;
+	}
+	pat = NULL;		// search_regcomp() will use previous pattern
+	sub = old_sub;
+
+	// Vi compatibility quirk: repeating with ":s" keeps the cursor in the
+	// last column after using "$".
+	endcolumn = (curwin->w_curswant == MAXCOL);
+    }
+
+    // Recognize ":%s/\n//" and turn it into a join command, which is much
+    // more efficient.
+    // TODO: find a generic solution to make line-joining operations more
+    // efficient, avoid allocating a string that grows in size.
+    if (pat != NULL && STRCMP(pat, "\\n") == 0
+	    && *sub == NUL
+	    && (*cmd == NUL || (cmd[1] == NUL && (*cmd == 'g' || *cmd == 'l'
+					     || *cmd == 'p' || *cmd == '#'))))
+    {
+	linenr_T    joined_lines_count;
+
+	if (eap->skip)
+	    return;
+	curwin->w_cursor.lnum = eap->line1;
+	if (*cmd == 'l')
+	    eap->flags = EXFLAG_LIST;
+	else if (*cmd == '#')
+	    eap->flags = EXFLAG_NR;
+	else if (*cmd == 'p')
+	    eap->flags = EXFLAG_PRINT;
+
+	// The number of lines joined is the number of lines in the range plus
+	// one.  One less when the last line is included.
+	joined_lines_count = eap->line2 - eap->line1 + 1;
+	if (eap->line2 < curbuf->b_ml.ml_line_count)
+	    ++joined_lines_count;
+	if (joined_lines_count > 1)
+	{
+	    (void)do_join(joined_lines_count, FALSE, TRUE, FALSE, TRUE);
+	    sub_nsubs = joined_lines_count - 1;
+	    sub_nlines = 1;
+	    (void)do_sub_msg(FALSE);
+	    ex_may_print(eap);
+	}
+
+	if ((cmdmod.cmod_flags & CMOD_KEEPPATTERNS) == 0)
+	    save_re_pat(RE_SUBST, pat, magic_isset());
+	// put pattern in history
+	add_to_history(HIST_SEARCH, pat, TRUE, NUL);
+
+	return;
+    }
+
+    /*
+     * Find trailing options.  When '&' is used, keep old options.
+     */
+    if (*cmd == '&')
+	++cmd;
+    else
+    {
+#ifdef FEAT_EVAL
+	if (in_vim9script())
+	{
+	    // ignore 'gdefault' and 'edcompatible'
+	    subflags.do_all = FALSE;
+	    subflags.do_ask = FALSE;
+	}
+	else
+#endif
+	if (!p_ed)
+	{
+	    if (p_gd)		// default is global on
+		subflags.do_all = TRUE;
+	    else
+		subflags.do_all = FALSE;
+	    subflags.do_ask = FALSE;
+	}
+	subflags.do_error = TRUE;
+	subflags.do_print = FALSE;
+	subflags.do_list = FALSE;
+	subflags.do_count = FALSE;
+	subflags.do_number = FALSE;
+	subflags.do_ic = 0;
+    }
+    while (*cmd)
+    {
+	/*
+	 * Note that 'g' and 'c' are always inverted, also when p_ed is off.
+	 * 'r' is never inverted.
+	 */
+	if (*cmd == 'g')
+	    subflags.do_all = !subflags.do_all;
+	else if (*cmd == 'c')
+	    subflags.do_ask = !subflags.do_ask;
+	else if (*cmd == 'n')
+	    subflags.do_count = TRUE;
+	else if (*cmd == 'e')
+	    subflags.do_error = !subflags.do_error;
+	else if (*cmd == 'r')	    // use last used regexp
+	    which_pat = RE_LAST;
+	else if (*cmd == 'p')
+	    subflags.do_print = TRUE;
+	else if (*cmd == '#')
+	{
+	    subflags.do_print = TRUE;
+	    subflags.do_number = TRUE;
+	}
+	else if (*cmd == 'l')
+	{
+	    subflags.do_print = TRUE;
+	    subflags.do_list = TRUE;
+	}
+	else if (*cmd == 'i')	    // ignore case
+	    subflags.do_ic = 'i';
+	else if (*cmd == 'I')	    // don't ignore case
+	    subflags.do_ic = 'I';
+	else
+	    break;
+	++cmd;
+    }
+    if (subflags.do_count)
+	subflags.do_ask = FALSE;
+
+    save_do_all = subflags.do_all;
+    save_do_ask = subflags.do_ask;
+
+    /*
+     * check for a trailing count
+     */
+    cmd = skipwhite(cmd);
+    if (VIM_ISDIGIT(*cmd))
+    {
+	i = getdigits(&cmd);
+	if (i <= 0 && !eap->skip && subflags.do_error)
+	{
+	    emsg(_(e_positive_count_required));
+	    return;
+	}
+	eap->line1 = eap->line2;
+	eap->line2 += i - 1;
+	if (eap->line2 > curbuf->b_ml.ml_line_count)
+	    eap->line2 = curbuf->b_ml.ml_line_count;
+    }
+
+    /*
+     * check for trailing command or garbage
+     */
+    cmd = skipwhite(cmd);
+    if (*cmd && *cmd != '"')	    // if not end-of-line or comment
+    {
+	set_nextcmd(eap, cmd);
+	if (eap->nextcmd == NULL)
+	{
+	    semsg(_(e_trailing_characters_str), cmd);
+	    return;
+	}
+    }
+
+    if (eap->skip)	    // not executing commands, only parsing
+	return;
+
+    if (!subflags.do_count && !curbuf->b_p_ma)
+    {
+	// Substitution is not allowed in non-'modifiable' buffer
+	emsg(_(e_cannot_make_changes_modifiable_is_off));
+	return;
+    }
+
+    if (search_regcomp(pat, NULL, RE_SUBST, which_pat, SEARCH_HIS, &regmatch) == FAIL)
+    {
+	if (subflags.do_error)
+	    emsg(_(e_invalid_command));
+	return;
+    }
+
+    // the 'i' or 'I' flag overrules 'ignorecase' and 'smartcase'
+    if (subflags.do_ic == 'i')
+	regmatch.rmm_ic = TRUE;
+    else if (subflags.do_ic == 'I')
+	regmatch.rmm_ic = FALSE;
+
+    sub_firstline = NULL;
+
+    /*
+     * If the substitute pattern starts with "\=" then it's an expression.
+     * Make a copy, a recursive function may free it.
+     * Otherwise, '~' in the substitute pattern is replaced with the old
+     * pattern.  We do it here once to avoid it to be replaced over and over
+     * again.
+     */
+    if (sub[0] == '\\' && sub[1] == '=')
+    {
+	sub = vim_strsave(sub);
+	if (sub == NULL)
+	    return;
+	sub_copy = sub;
+    }
+    else
+    {
+	char_u *newsub = regtilde(sub, magic_isset());
+
+	if (newsub != sub)
+	{
+	    // newsub was allocated, free it later.
+	    sub_copy = newsub;
+	    sub = newsub;
+	}
+    }
+
+    /*
+     * Check for a match on each line.
+     */
+    line2 = eap->line2;
+    for (lnum = eap->line1; lnum <= line2 && !(got_quit
+#if defined(FEAT_EVAL)
+		|| aborting()
+#endif
+		); ++lnum)
+    {
+	nmatch = vim_regexec_multi(&regmatch, curwin, curbuf, lnum,
+						       (colnr_T)0, NULL);
+	if (nmatch)
+	{
+	    colnr_T	copycol;
+	    colnr_T	matchcol;
+	    colnr_T	prev_matchcol = MAXCOL;
+	    char_u	*new_end, *new_start = NULL;
+	    unsigned	new_start_len = 0;
+	    char_u	*p1;
+	    int		did_sub = FALSE;
+	    int		lastone;
+	    int		len, copy_len, needed_len;
+	    long	nmatch_tl = 0;	// nr of lines matched below lnum
+	    int		do_again;	// do it again after joining lines
+	    int		skip_match = FALSE;
+	    linenr_T	sub_firstlnum;	// nr of first sub line
+#ifdef FEAT_PROP_POPUP
+	    int		apc_flags = APC_SAVE_FOR_UNDO | APC_SUBSTITUTE;
+	    colnr_T	total_added =  0;
+	    int		text_prop_count = 0;
+#endif
+
+	    /*
+	     * The new text is build up step by step, to avoid too much
+	     * copying.  There are these pieces:
+	     * sub_firstline	The old text, unmodified.
+	     * copycol		Column in the old text where we started
+	     *			looking for a match; from here old text still
+	     *			needs to be copied to the new text.
+	     * matchcol		Column number of the old text where to look
+	     *			for the next match.  It's just after the
+	     *			previous match or one further.
+	     * prev_matchcol	Column just after the previous match (if any).
+	     *			Mostly equal to matchcol, except for the first
+	     *			match and after skipping an empty match.
+	     * regmatch.*pos	Where the pattern matched in the old text.
+	     * new_start	The new text, all that has been produced so
+	     *			far.
+	     * new_end		The new text, where to append new text.
+	     *
+	     * lnum		The line number where we found the start of
+	     *			the match.  Can be below the line we searched
+	     *			when there is a \n before a \zs in the
+	     *			pattern.
+	     * sub_firstlnum	The line number in the buffer where to look
+	     *			for a match.  Can be different from "lnum"
+	     *			when the pattern or substitute string contains
+	     *			line breaks.
+	     *
+	     * Special situations:
+	     * - When the substitute string contains a line break, the part up
+	     *   to the line break is inserted in the text, but the copy of
+	     *   the original line is kept.  "sub_firstlnum" is adjusted for
+	     *   the inserted lines.
+	     * - When the matched pattern contains a line break, the old line
+	     *   is taken from the line at the end of the pattern.  The lines
+	     *   in the match are deleted later, "sub_firstlnum" is adjusted
+	     *   accordingly.
+	     *
+	     * The new text is built up in new_start[].  It has some extra
+	     * room to avoid using alloc()/free() too often.  new_start_len is
+	     * the length of the allocated memory at new_start.
+	     *
+	     * Make a copy of the old line, so it won't be taken away when
+	     * updating the screen or handling a multi-line match.  The "old_"
+	     * pointers point into this copy.
+	     */
+	    sub_firstlnum = lnum;
+	    copycol = 0;
+	    matchcol = 0;
+
+	    // At first match, remember current cursor position.
+	    if (!got_match)
+	    {
+		setpcmark();
+		got_match = TRUE;
+	    }
+
+	    /*
+	     * Loop until nothing more to replace in this line.
+	     * 1. Handle match with empty string.
+	     * 2. If do_ask is set, ask for confirmation.
+	     * 3. substitute the string.
+	     * 4. if do_all is set, find next match
+	     * 5. break if there isn't another match in this line
+	     */
+	    for (;;)
+	    {
+		// Advance "lnum" to the line where the match starts.  The
+		// match does not start in the first line when there is a line
+		// break before \zs.
+		if (regmatch.startpos[0].lnum > 0)
+		{
+		    lnum += regmatch.startpos[0].lnum;
+		    sub_firstlnum += regmatch.startpos[0].lnum;
+		    nmatch -= regmatch.startpos[0].lnum;
+		    VIM_CLEAR(sub_firstline);
+		}
+
+		// Match might be after the last line for "\n\zs" matching at
+		// the end of the last line.
+		if (lnum > curbuf->b_ml.ml_line_count)
+		    break;
+
+		if (sub_firstline == NULL)
+		{
+		    sub_firstline = vim_strsave(ml_get(sub_firstlnum));
+		    if (sub_firstline == NULL)
+		    {
+			vim_free(new_start);
+			goto outofmem;
+		    }
+		}
+
+		// Save the line number of the last change for the final
+		// cursor position (just like Vi).
+		curwin->w_cursor.lnum = lnum;
+		do_again = FALSE;
+
+		/*
+		 * 1. Match empty string does not count, except for first
+		 * match.  This reproduces the strange vi behaviour.
+		 * This also catches endless loops.
+		 */
+		if (matchcol == prev_matchcol
+			&& regmatch.endpos[0].lnum == 0
+			&& matchcol == regmatch.endpos[0].col)
+		{
+		    if (sub_firstline[matchcol] == NUL)
+			// We already were at the end of the line.  Don't look
+			// for a match in this line again.
+			skip_match = TRUE;
+		    else
+		    {
+			 // search for a match at next column
+			if (has_mbyte)
+			    matchcol += mb_ptr2len(sub_firstline + matchcol);
+			else
+			    ++matchcol;
+		    }
+		    goto skip;
+		}
+
+		// Normally we continue searching for a match just after the
+		// previous match.
+		matchcol = regmatch.endpos[0].col;
+		prev_matchcol = matchcol;
+
+		/*
+		 * 2. If do_count is set only increase the counter.
+		 *    If do_ask is set, ask for confirmation.
+		 */
+		if (subflags.do_count)
+		{
+		    // For a multi-line match, put matchcol at the NUL at
+		    // the end of the line and set nmatch to one, so that
+		    // we continue looking for a match on the next line.
+		    // Avoids that ":s/\nB\@=//gc" get stuck.
+		    if (nmatch > 1)
+		    {
+			matchcol = (colnr_T)STRLEN(sub_firstline);
+			nmatch = 1;
+			skip_match = TRUE;
+		    }
+		    sub_nsubs++;
+		    did_sub = TRUE;
+#ifdef FEAT_EVAL
+		    // Skip the substitution, unless an expression is used,
+		    // then it is evaluated in the sandbox.
+		    if (!(sub[0] == '\\' && sub[1] == '='))
+#endif
+			goto skip;
+		}
+
+		if (subflags.do_ask)
+		{
+		    int typed = 0;
+
+		    // change State to MODE_CONFIRM, so that the mouse works
+		    // properly
+		    save_State = State;
+		    State = MODE_CONFIRM;
+		    setmouse();		// disable mouse in xterm
+		    curwin->w_cursor.col = regmatch.startpos[0].col;
+		    if (curwin->w_p_crb)
+			do_check_cursorbind();
+
+		    // When 'cpoptions' contains "u" don't sync undo when
+		    // asking for confirmation.
+		    if (vim_strchr(p_cpo, CPO_UNDO) != NULL)
+			++no_u_sync;
+
+		    /*
+		     * Loop until 'y', 'n', 'q', CTRL-E or CTRL-Y typed.
+		     */
+		    while (subflags.do_ask)
+		    {
+			if (exmode_active)
+			{
+			    char_u	*resp;
+			    colnr_T	sc, ec;
+
+			    print_line_no_prefix(lnum,
+					 subflags.do_number, subflags.do_list);
+
+			    getvcol(curwin, &curwin->w_cursor, &sc, NULL, NULL);
+			    curwin->w_cursor.col = regmatch.endpos[0].col - 1;
+			    if (curwin->w_cursor.col < 0)
+				curwin->w_cursor.col = 0;
+			    getvcol(curwin, &curwin->w_cursor, NULL, NULL, &ec);
+			    curwin->w_cursor.col = regmatch.startpos[0].col;
+			    if (subflags.do_number || curwin->w_p_nu)
+			    {
+				int numw = number_width(curwin) + 1;
+				sc += numw;
+				ec += numw;
+			    }
+			    msg_start();
+			    for (i = 0; i < (long)sc; ++i)
+				msg_putchar(' ');
+			    for ( ; i <= (long)ec; ++i)
+				msg_putchar('^');
+
+			    resp = getexmodeline('?', NULL, 0, TRUE);
+			    if (resp != NULL)
+			    {
+				typed = *resp;
+				vim_free(resp);
+				// When ":normal" runs out of characters we get
+				// an empty line.  Use "q" to get out of the
+				// loop.
+				if (ex_normal_busy && typed == NUL)
+				    typed = 'q';
+			    }
+			}
+			else
+			{
+			    char_u *orig_line = NULL;
+			    int    len_change = 0;
+			    int	   save_p_lz = p_lz;
+#ifdef FEAT_FOLDING
+			    int save_p_fen = curwin->w_p_fen;
+
+			    curwin->w_p_fen = FALSE;
+#endif
+			    // Invert the matched string.
+			    // Remove the inversion afterwards.
+			    temp = RedrawingDisabled;
+			    RedrawingDisabled = 0;
+
+			    // avoid calling update_screen() in vgetorpeek()
+			    p_lz = FALSE;
+
+			    if (new_start != NULL)
+			    {
+				// There already was a substitution, we would
+				// like to show this to the user.  We cannot
+				// really update the line, it would change
+				// what matches.  Temporarily replace the line
+				// and change it back afterwards.
+				orig_line = vim_strsave(ml_get(lnum));
+				if (orig_line != NULL)
+				{
+				    char_u *new_line = concat_str(new_start,
+						     sub_firstline + copycol);
+
+				    if (new_line == NULL)
+					VIM_CLEAR(orig_line);
+				    else
+				    {
+					// Position the cursor relative to the
+					// end of the line, the previous
+					// substitute may have inserted or
+					// deleted characters before the
+					// cursor.
+					len_change = (int)STRLEN(new_line)
+						     - (int)STRLEN(orig_line);
+					curwin->w_cursor.col += len_change;
+					ml_replace(lnum, new_line, FALSE);
+				    }
+				}
+			    }
+
+			    search_match_lines = regmatch.endpos[0].lnum
+						  - regmatch.startpos[0].lnum;
+			    search_match_endcol = regmatch.endpos[0].col
+								 + len_change;
+			    if (search_match_lines == 0
+						   && search_match_endcol == 0)
+				// highlight at least one character for /^/
+				search_match_endcol = 1;
+			    highlight_match = TRUE;
+
+			    update_topline();
+			    validate_cursor();
+			    update_screen(UPD_SOME_VALID);
+			    highlight_match = FALSE;
+			    redraw_later(UPD_SOME_VALID);
+
+#ifdef FEAT_FOLDING
+			    curwin->w_p_fen = save_p_fen;
+#endif
+			    if (msg_row == Rows - 1)
+				msg_didout = FALSE;	// avoid a scroll-up
+			    msg_starthere();
+			    i = msg_scroll;
+			    msg_scroll = 0;		// truncate msg when
+							// needed
+			    msg_no_more = TRUE;
+			    // write message same highlighting as for
+			    // wait_return()
+			    smsg_attr(HL_ATTR(HLF_R),
+				_("replace with %s (y/n/a/q/l/^E/^Y)?"), sub);
+			    msg_no_more = FALSE;
+			    msg_scroll = i;
+			    showruler(TRUE);
+			    windgoto(msg_row, msg_col);
+			    RedrawingDisabled = temp;
+
+#ifdef USE_ON_FLY_SCROLL
+			    dont_scroll = FALSE; // allow scrolling here
+#endif
+			    ++no_mapping;	// don't map this key
+			    ++allow_keys;	// allow special keys
+			    typed = plain_vgetc();
+			    --allow_keys;
+			    --no_mapping;
+
+			    // clear the question
+			    msg_didout = FALSE;	// don't scroll up
+			    msg_col = 0;
+			    gotocmdline(TRUE);
+			    p_lz = save_p_lz;
+
+			    // restore the line
+			    if (orig_line != NULL)
+				ml_replace(lnum, orig_line, FALSE);
+			}
+
+			need_wait_return = FALSE; // no hit-return prompt
+			if (typed == 'q' || typed == ESC || typed == Ctrl_C
+#ifdef UNIX
+				|| typed == intr_char
+#endif
+				)
+			{
+			    got_quit = TRUE;
+			    break;
+			}
+			if (typed == 'n')
+			    break;
+			if (typed == 'y')
+			    break;
+			if (typed == 'l')
+			{
+			    // last: replace and then stop
+			    subflags.do_all = FALSE;
+			    line2 = lnum;
+			    break;
+			}
+			if (typed == 'a')
+			{
+			    subflags.do_ask = FALSE;
+			    break;
+			}
+			if (typed == Ctrl_E)
+			    scrollup_clamp();
+			else if (typed == Ctrl_Y)
+			    scrolldown_clamp();
+		    }
+		    State = save_State;
+		    setmouse();
+		    if (vim_strchr(p_cpo, CPO_UNDO) != NULL)
+			--no_u_sync;
+
+		    if (typed == 'n')
+		    {
+			// For a multi-line match, put matchcol at the NUL at
+			// the end of the line and set nmatch to one, so that
+			// we continue looking for a match on the next line.
+			// Avoids that ":%s/\nB\@=//gc" and ":%s/\n/,\r/gc"
+			// get stuck when pressing 'n'.
+			if (nmatch > 1)
+			{
+			    matchcol = (colnr_T)STRLEN(sub_firstline);
+			    skip_match = TRUE;
+			}
+			goto skip;
+		    }
+		    if (got_quit)
+			goto skip;
+		}
+
+		// Move the cursor to the start of the match, so that we can
+		// use "\=col(".").
+		curwin->w_cursor.col = regmatch.startpos[0].col;
+
+		/*
+		 * 3. substitute the string.
+		 */
+#ifdef FEAT_EVAL
+		save_ma = curbuf->b_p_ma;
+		save_sandbox = sandbox;
+		if (subflags.do_count)
+		{
+		    // prevent accidentally changing the buffer by a function
+		    curbuf->b_p_ma = FALSE;
+		    sandbox++;
+		}
+		// Save flags for recursion.  They can change for e.g.
+		// :s/^/\=execute("s#^##gn")
+		subflags_save = subflags;
+
+		// Disallow changing text or switching window in an expression.
+		++textlock;
+#endif
+		// Get length of substitution part, including the NUL.
+		// When it fails sublen is zero.
+		sublen = vim_regsub_multi(&regmatch,
+				    sub_firstlnum - regmatch.startpos[0].lnum,
+			       sub, sub_firstline, 0,
+			       REGSUB_BACKSLASH
+				    | (magic_isset() ? REGSUB_MAGIC : 0));
+#ifdef FEAT_EVAL
+		--textlock;
+
+		// If getting the substitute string caused an error, don't do
+		// the replacement.
+		// Don't keep flags set by a recursive call.
+		subflags = subflags_save;
+		if (sublen == 0 || aborting() || subflags.do_count)
+		{
+		    curbuf->b_p_ma = save_ma;
+		    sandbox = save_sandbox;
+		    goto skip;
+		}
+#endif
+
+		// When the match included the "$" of the last line it may
+		// go beyond the last line of the buffer.
+		if (nmatch > curbuf->b_ml.ml_line_count - sub_firstlnum + 1)
+		{
+		    nmatch = curbuf->b_ml.ml_line_count - sub_firstlnum + 1;
+		    skip_match = TRUE;
+		}
+
+		// Need room for:
+		// - result so far in new_start (not for first sub in line)
+		// - original text up to match
+		// - length of substituted part
+		// - original text after match
+		// Adjust text properties here, since we have all information
+		// needed.
+		if (nmatch == 1)
+		{
+		    p1 = sub_firstline;
+#ifdef FEAT_PROP_POPUP
+		    if (curbuf->b_has_textprop)
+		    {
+			int bytes_added = sublen - 1 - (regmatch.endpos[0].col
+						   - regmatch.startpos[0].col);
+
+			// When text properties are changed, need to save for
+			// undo first, unless done already.
+			if (adjust_prop_columns(lnum,
+					total_added + regmatch.startpos[0].col,
+						       bytes_added, apc_flags))
+			    apc_flags &= ~APC_SAVE_FOR_UNDO;
+			// Offset for column byte number of the text property
+			// in the resulting buffer afterwards.
+			total_added += bytes_added;
+		    }
+#endif
+		}
+		else
+		{
+		    linenr_T	lastlnum = sub_firstlnum + nmatch - 1;
+#ifdef FEAT_PROP_POPUP
+		    if (curbuf->b_has_textprop)
+		    {
+			char_u	*prop_start;
+
+			// Props in the first line may be shortened or deleted
+			if (adjust_prop_columns(lnum,
+					total_added + regmatch.startpos[0].col,
+						       -MAXCOL, apc_flags))
+			    apc_flags &= ~APC_SAVE_FOR_UNDO;
+			total_added -= (colnr_T)STRLEN(
+				     sub_firstline + regmatch.startpos[0].col);
+
+			// Props in the last line may be moved or deleted
+			if (adjust_prop_columns(lastlnum,
+					0, -regmatch.endpos[0].col, apc_flags))
+			    // When text properties are changed, need to save
+			    // for undo first, unless done already.
+			    apc_flags &= ~APC_SAVE_FOR_UNDO;
+
+			// Copy the text props of the last line, they will be
+			// later appended to the changed line.
+			text_prop_count = get_text_props(curbuf, lastlnum,
+							   &prop_start, FALSE);
+			if (text_prop_count > 0)
+			{
+			    // TODO: what when we already did this?
+			    vim_free(text_props);
+			    text_props = ALLOC_MULT(textprop_T,
+							      text_prop_count);
+			    if (text_props != NULL)
+			    {
+				int pi;
+
+				mch_memmove(text_props, prop_start,
+					 text_prop_count * sizeof(textprop_T));
+				// After joining the text prop columns will
+				// increase.
+				for (pi = 0; pi < text_prop_count; ++pi)
+				    text_props[pi].tp_col +=
+					 regmatch.startpos[0].col + sublen - 1;
+			    }
+			}
+		    }
+#endif
+		    p1 = ml_get(lastlnum);
+		    nmatch_tl += nmatch - 1;
+#ifdef FEAT_PROP_POPUP
+		    if (curbuf->b_has_textprop)
+			total_added += (colnr_T)STRLEN(
+						  p1 + regmatch.endpos[0].col);
+#endif
+		}
+		copy_len = regmatch.startpos[0].col - copycol;
+		needed_len = copy_len + ((unsigned)STRLEN(p1)
+				       - regmatch.endpos[0].col) + sublen + 1;
+		if (new_start == NULL)
+		{
+		    /*
+		     * Get some space for a temporary buffer to do the
+		     * substitution into (and some extra space to avoid
+		     * too many calls to alloc()/free()).
+		     */
+		    new_start_len = needed_len + 50;
+		    if ((new_start = alloc(new_start_len)) == NULL)
+			goto outofmem;
+		    *new_start = NUL;
+		    new_end = new_start;
+		}
+		else
+		{
+		    /*
+		     * Check if the temporary buffer is long enough to do the
+		     * substitution into.  If not, make it larger (with a bit
+		     * extra to avoid too many calls to alloc()/free()).
+		     */
+		    len = (unsigned)STRLEN(new_start);
+		    needed_len += len;
+		    if (needed_len > (int)new_start_len)
+		    {
+			new_start_len = needed_len + 50;
+			if ((p1 = alloc(new_start_len)) == NULL)
+			{
+			    vim_free(new_start);
+			    goto outofmem;
+			}
+			mch_memmove(p1, new_start, (size_t)(len + 1));
+			vim_free(new_start);
+			new_start = p1;
+		    }
+		    new_end = new_start + len;
+		}
+
+		/*
+		 * copy the text up to the part that matched
+		 */
+		mch_memmove(new_end, sub_firstline + copycol, (size_t)copy_len);
+		new_end += copy_len;
+
+#ifdef FEAT_EVAL
+		++textlock;
+#endif
+		(void)vim_regsub_multi(&regmatch,
+				    sub_firstlnum - regmatch.startpos[0].lnum,
+				      sub, new_end, sublen,
+				      REGSUB_COPY | REGSUB_BACKSLASH
+					 | (magic_isset() ? REGSUB_MAGIC : 0));
+#ifdef FEAT_EVAL
+		--textlock;
+#endif
+		sub_nsubs++;
+		did_sub = TRUE;
+
+		// Move the cursor to the start of the line, to avoid that it
+		// is beyond the end of the line after the substitution.
+		curwin->w_cursor.col = 0;
+
+		// For a multi-line match, make a copy of the last matched
+		// line and continue in that one.
+		if (nmatch > 1)
+		{
+		    sub_firstlnum += nmatch - 1;
+		    vim_free(sub_firstline);
+		    sub_firstline = vim_strsave(ml_get(sub_firstlnum));
+		    // When going beyond the last line, stop substituting.
+		    if (sub_firstlnum <= line2)
+			do_again = TRUE;
+		    else
+			subflags.do_all = FALSE;
+		}
+
+		// Remember next character to be copied.
+		copycol = regmatch.endpos[0].col;
+
+		if (skip_match)
+		{
+		    // Already hit end of the buffer, sub_firstlnum is one
+		    // less than what it ought to be.
+		    vim_free(sub_firstline);
+		    sub_firstline = vim_strsave((char_u *)"");
+		    copycol = 0;
+		}
+
+		/*
+		 * Now the trick is to replace CTRL-M chars with a real line
+		 * break.  This would make it impossible to insert a CTRL-M in
+		 * the text.  The line break can be avoided by preceding the
+		 * CTRL-M with a backslash.  To be able to insert a backslash,
+		 * they must be doubled in the string and are halved here.
+		 * That is Vi compatible.
+		 */
+		for (p1 = new_end; *p1; ++p1)
+		{
+		    if (p1[0] == '\\' && p1[1] != NUL)  // remove backslash
+		    {
+			STRMOVE(p1, p1 + 1);
+#ifdef FEAT_PROP_POPUP
+			if (curbuf->b_has_textprop)
+			{
+			    // When text properties are changed, need to save
+			    // for undo first, unless done already.
+			    if (adjust_prop_columns(lnum,
+					(colnr_T)(p1 - new_start), -1,
+					apc_flags))
+				apc_flags &= ~APC_SAVE_FOR_UNDO;
+			}
+#endif
+		    }
+		    else if (*p1 == CAR)
+		    {
+			if (u_inssub(lnum) == OK)   // prepare for undo
+			{
+			    colnr_T	plen = (colnr_T)(p1 - new_start + 1);
+
+			    *p1 = NUL;		    // truncate up to the CR
+			    ml_append(lnum - 1, new_start, plen, FALSE);
+			    mark_adjust(lnum + 1, (linenr_T)MAXLNUM, 1L, 0L);
+			    if (subflags.do_ask)
+				appended_lines(lnum - 1, 1L);
+			    else
+			    {
+				if (first_line == 0)
+				    first_line = lnum;
+				last_line = lnum + 1;
+			    }
+#ifdef FEAT_PROP_POPUP
+			    adjust_props_for_split(lnum + 1, lnum,
+							       plen, 1, FALSE);
+#endif
+			    // all line numbers increase
+			    ++sub_firstlnum;
+			    ++lnum;
+			    ++line2;
+			    // move the cursor to the new line, like Vi
+			    ++curwin->w_cursor.lnum;
+			    // copy the rest
+			    STRMOVE(new_start, p1 + 1);
+			    p1 = new_start - 1;
+			}
+		    }
+		    else if (has_mbyte)
+			p1 += (*mb_ptr2len)(p1) - 1;
+		}
+
+		/*
+		 * 4. If do_all is set, find next match.
+		 * Prevent endless loop with patterns that match empty
+		 * strings, e.g. :s/$/pat/g or :s/[a-z]* /(&)/g.
+		 * But ":s/\n/#/" is OK.
+		 */
+skip:
+		// We already know that we did the last subst when we are at
+		// the end of the line, except that a pattern like
+		// "bar\|\nfoo" may match at the NUL.  "lnum" can be below
+		// "line2" when there is a \zs in the pattern after a line
+		// break.
+		lastone = (skip_match
+			|| got_int
+			|| got_quit
+			|| lnum > line2
+			|| !(subflags.do_all || do_again)
+			|| (sub_firstline[matchcol] == NUL && nmatch <= 1
+					 && !re_multiline(regmatch.regprog)));
+		nmatch = -1;
+
+		/*
+		 * Replace the line in the buffer when needed.  This is
+		 * skipped when there are more matches.
+		 * The check for nmatch_tl is needed for when multi-line
+		 * matching must replace the lines before trying to do another
+		 * match, otherwise "\@<=" won't work.
+		 * When the match starts below where we start searching also
+		 * need to replace the line first (using \zs after \n).
+		 */
+		if (lastone
+			|| nmatch_tl > 0
+			|| (nmatch = vim_regexec_multi(&regmatch, curwin,
+							curbuf, sub_firstlnum,
+						    matchcol, NULL)) == 0
+			|| regmatch.startpos[0].lnum > 0)
+		{
+		    if (new_start != NULL)
+		    {
+			/*
+			 * Copy the rest of the line, that didn't match.
+			 * "matchcol" has to be adjusted, we use the end of
+			 * the line as reference, because the substitute may
+			 * have changed the number of characters.  Same for
+			 * "prev_matchcol".
+			 */
+			STRCAT(new_start, sub_firstline + copycol);
+			matchcol = (colnr_T)STRLEN(sub_firstline) - matchcol;
+			prev_matchcol = (colnr_T)STRLEN(sub_firstline)
+							      - prev_matchcol;
+
+			if (u_savesub(lnum) != OK)
+			    break;
+			ml_replace(lnum, new_start, TRUE);
+#ifdef FEAT_PROP_POPUP
+			if (text_props != NULL)
+			    add_text_props(lnum, text_props, text_prop_count);
+#endif
+			if (nmatch_tl > 0)
+			{
+			    /*
+			     * Matched lines have now been substituted and are
+			     * useless, delete them.  The part after the match
+			     * has been appended to new_start, we don't need
+			     * it in the buffer.
+			     */
+			    ++lnum;
+			    if (u_savedel(lnum, nmatch_tl) != OK)
+				break;
+			    for (i = 0; i < nmatch_tl; ++i)
+				ml_delete(lnum);
+			    mark_adjust(lnum, lnum + nmatch_tl - 1,
+						   (long)MAXLNUM, -nmatch_tl);
+			    if (subflags.do_ask)
+				deleted_lines(lnum, nmatch_tl);
+			    --lnum;
+			    line2 -= nmatch_tl; // nr of lines decreases
+			    nmatch_tl = 0;
+			}
+
+			// When asking, undo is saved each time, must also set
+			// changed flag each time.
+			if (subflags.do_ask)
+			    changed_bytes(lnum, 0);
+			else
+			{
+			    if (first_line == 0)
+				first_line = lnum;
+			    last_line = lnum + 1;
+			}
+
+			sub_firstlnum = lnum;
+			vim_free(sub_firstline);    // free the temp buffer
+			sub_firstline = new_start;
+			new_start = NULL;
+			matchcol = (colnr_T)STRLEN(sub_firstline) - matchcol;
+			prev_matchcol = (colnr_T)STRLEN(sub_firstline)
+							      - prev_matchcol;
+			copycol = 0;
+		    }
+		    if (nmatch == -1 && !lastone)
+			nmatch = vim_regexec_multi(&regmatch, curwin, curbuf,
+					  sub_firstlnum, matchcol, NULL);
+
+		    /*
+		     * 5. break if there isn't another match in this line
+		     */
+		    if (nmatch <= 0)
+		    {
+			// If the match found didn't start where we were
+			// searching, do the next search in the line where we
+			// found the match.
+			if (nmatch == -1)
+			    lnum -= regmatch.startpos[0].lnum;
+			break;
+		    }
+		}
+
+		line_breakcheck();
+	    }
+
+	    if (did_sub)
+		++sub_nlines;
+	    vim_free(new_start);	// for when substitute was cancelled
+	    VIM_CLEAR(sub_firstline);	// free the copy of the original line
+	}
+
+	line_breakcheck();
+    }
+
+    if (first_line != 0)
+    {
+	// Need to subtract the number of added lines from "last_line" to get
+	// the line number before the change (same as adding the number of
+	// deleted lines).
+	i = curbuf->b_ml.ml_line_count - old_line_count;
+	changed_lines(first_line, 0, last_line - i, i);
+    }
+
+outofmem:
+    vim_free(sub_firstline); // may have to free allocated copy of the line
+
+#ifdef FEAT_PROP_POPUP
+    vim_free(text_props);
+#endif
+
+    // ":s/pat//n" doesn't move the cursor
+    if (subflags.do_count)
+	curwin->w_cursor = old_cursor;
+
+    if (sub_nsubs > start_nsubs)
+    {
+	if ((cmdmod.cmod_flags & CMOD_LOCKMARKS) == 0)
+	{
+	    // Set the '[ and '] marks.
+	    curbuf->b_op_start.lnum = eap->line1;
+	    curbuf->b_op_end.lnum = line2;
+	    curbuf->b_op_start.col = curbuf->b_op_end.col = 0;
+	}
+
+	if (!global_busy)
+	{
+	    // when interactive leave cursor on the match
+	    if (!subflags.do_ask)
+	    {
+		if (endcolumn)
+		    coladvance((colnr_T)MAXCOL);
+		else
+		    beginline(BL_WHITE | BL_FIX);
+	    }
+	    if (!do_sub_msg(subflags.do_count) && subflags.do_ask)
+		msg("");
+	}
+	else
+	    global_need_beginline = TRUE;
+	if (subflags.do_print)
+	    print_line(curwin->w_cursor.lnum,
+					 subflags.do_number, subflags.do_list);
+    }
+    else if (!global_busy)
+    {
+	if (got_int)		// interrupted
+	    emsg(_(e_interrupted));
+	else if (got_match)	// did find something but nothing substituted
+	    msg("");
+	else if (subflags.do_error)	// nothing found
+	    semsg(_(e_pattern_not_found_str), get_search_pat());
+    }
+
+#ifdef FEAT_FOLDING
+    if (subflags.do_ask && hasAnyFolding(curwin))
+	// Cursor position may require updating
+	changed_window_setting();
+#endif
+
+    vim_regfree(regmatch.regprog);
+    vim_free(sub_copy);
+
+    // Restore the flag values, they can be used for ":&&".
+    subflags.do_all = save_do_all;
+    subflags.do_ask = save_do_ask;
+}
+
+/*
+ * Give message for number of substitutions.
+ * Can also be used after a ":global" command.
+ * Return TRUE if a message was given.
+ */
+    int
+do_sub_msg(
+    int	    count_only)		// used 'n' flag for ":s"
+{
+    /*
+     * Only report substitutions when:
+     * - more than 'report' substitutions
+     * - command was typed by user, or number of changed lines > 'report'
+     * - giving messages is not disabled by 'lazyredraw'
+     */
+    if (((sub_nsubs > p_report && (KeyTyped || sub_nlines > 1 || p_report < 1))
+		|| count_only)
+	    && messaging())
+    {
+	char	*msg_single;
+	char	*msg_plural;
+
+	if (got_int)
+	    STRCPY(msg_buf, _("(Interrupted) "));
+	else
+	    *msg_buf = NUL;
+
+	msg_single = count_only
+		    ? NGETTEXT("%ld match on %ld line",
+					  "%ld matches on %ld line", sub_nsubs)
+		    : NGETTEXT("%ld substitution on %ld line",
+				   "%ld substitutions on %ld line", sub_nsubs);
+	msg_plural = count_only
+		    ? NGETTEXT("%ld match on %ld lines",
+					 "%ld matches on %ld lines", sub_nsubs)
+		    : NGETTEXT("%ld substitution on %ld lines",
+				  "%ld substitutions on %ld lines", sub_nsubs);
+
+	vim_snprintf_add(msg_buf, sizeof(msg_buf),
+				 NGETTEXT(msg_single, msg_plural, sub_nlines),
+				 sub_nsubs, (long)sub_nlines);
+
+	if (msg(msg_buf))
+	    // save message to display it after redraw
+	    set_keep_msg((char_u *)msg_buf, 0);
+	return TRUE;
+    }
+    if (got_int)
+    {
+	emsg(_(e_interrupted));
+	return TRUE;
+    }
+    return FALSE;
+}
+
+    static void
+global_exe_one(char_u *cmd, linenr_T lnum)
+{
+    curwin->w_cursor.lnum = lnum;
+    curwin->w_cursor.col = 0;
+    if (*cmd == NUL || *cmd == '\n')
+	do_cmdline((char_u *)"p", NULL, NULL, DOCMD_NOWAIT);
+    else
+	do_cmdline(cmd, NULL, NULL, DOCMD_NOWAIT);
+}
+
+/*
+ * Execute a global command of the form:
+ *
+ * g/pattern/X : execute X on all lines where pattern matches
+ * v/pattern/X : execute X on all lines where pattern does not match
+ *
+ * where 'X' is an EX command
+ *
+ * The command character (as well as the trailing slash) is optional, and
+ * is assumed to be 'p' if missing.
+ *
+ * This is implemented in two passes: first we scan the file for the pattern and
+ * set a mark for each line that (not) matches. Secondly we execute the command
+ * for each line that has a mark. This is required because after deleting
+ * lines we do not know where to search for the next match.
+ */
+    void
+ex_global(exarg_T *eap)
+{
+    linenr_T	lnum;		// line number according to old situation
+    int		ndone = 0;
+    int		type;		// first char of cmd: 'v' or 'g'
+    char_u	*cmd;		// command argument
+
+    char_u	delim;		// delimiter, normally '/'
+    char_u	*pat;
+    char_u	*used_pat;
+    regmmatch_T	regmatch;
+    int		match;
+    int		which_pat;
+
+    // When nesting the command works on one line.  This allows for
+    // ":g/found/v/notfound/command".
+    if (global_busy && (eap->line1 != 1
+				  || eap->line2 != curbuf->b_ml.ml_line_count))
+    {
+	// will increment global_busy to break out of the loop
+	emsg(_(e_cannot_do_global_recursive_with_range));
+	return;
+    }
+
+    if (eap->forceit)		    // ":global!" is like ":vglobal"
+	type = 'v';
+    else
+	type = *eap->cmd;
+    cmd = eap->arg;
+    which_pat = RE_LAST;	    // default: use last used regexp
+
+#ifdef FEAT_EVAL
+    if (in_vim9script() && check_global_and_subst(eap->cmd, eap->arg) == FAIL)
+	return;
+#endif
+
+    /*
+     * undocumented vi feature:
+     *	"\/" and "\?": use previous search pattern.
+     *		 "\&": use previous substitute pattern.
+     */
+    if (*cmd == '\\')
+    {
+	++cmd;
+	if (vim_strchr((char_u *)"/?&", *cmd) == NULL)
+	{
+	    emsg(_(e_backslash_should_be_followed_by));
+	    return;
+	}
+	if (*cmd == '&')
+	    which_pat = RE_SUBST;	// use previous substitute pattern
+	else
+	    which_pat = RE_SEARCH;	// use previous search pattern
+	++cmd;
+	pat = (char_u *)"";
+    }
+    else if (*cmd == NUL)
+    {
+	emsg(_(e_regular_expression_missing_from_global));
+	return;
+    }
+    else if (check_regexp_delim(*cmd) == FAIL)
+    {
+	return;
+    }
+    else
+    {
+	delim = *cmd;		// get the delimiter
+	++cmd;			// skip delimiter if there is one
+	pat = cmd;		// remember start of pattern
+	cmd = skip_regexp_ex(cmd, delim, magic_isset(), &eap->arg, NULL, NULL);
+	if (cmd[0] == delim)		    // end delimiter found
+	    *cmd++ = NUL;		    // replace it with a NUL
+    }
+
+    if (search_regcomp(pat, &used_pat, RE_BOTH, which_pat, SEARCH_HIS, &regmatch) == FAIL)
+    {
+	emsg(_(e_invalid_command));
+	return;
+    }
+
+    if (global_busy)
+    {
+	lnum = curwin->w_cursor.lnum;
+	match = vim_regexec_multi(&regmatch, curwin, curbuf, lnum,
+						       (colnr_T)0, NULL);
+	if ((type == 'g' && match) || (type == 'v' && !match))
+	    global_exe_one(cmd, lnum);
+    }
+    else
+    {
+	/*
+	 * pass 1: set marks for each (not) matching line
+	 */
+	for (lnum = eap->line1; lnum <= eap->line2 && !got_int; ++lnum)
+	{
+	    // a match on this line?
+	    match = vim_regexec_multi(&regmatch, curwin, curbuf, lnum,
+						       (colnr_T)0, NULL);
+	    if (regmatch.regprog == NULL)
+		break;  // re-compiling regprog failed
+	    if ((type == 'g' && match) || (type == 'v' && !match))
+	    {
+		ml_setmarked(lnum);
+		ndone++;
+	    }
+	    line_breakcheck();
+	}
+
+	/*
+	 * pass 2: execute the command for each line that has been marked
+	 */
+	if (got_int)
+	    msg(_(e_interrupted));
+	else if (ndone == 0)
+	{
+	    if (type == 'v')
+	    {
+		if (in_vim9script())
+		    semsg(_(e_pattern_found_in_every_line_str), used_pat);
+		else
+		    smsg(_("Pattern found in every line: %s"), used_pat);
+	    }
+	    else
+	    {
+		if (in_vim9script())
+		    semsg(_(e_pattern_not_found_str), used_pat);
+		else
+		    smsg(_("Pattern not found: %s"), used_pat);
+	    }
+	}
+	else
+	{
+#ifdef FEAT_CLIPBOARD
+	    start_global_changes();
+#endif
+	    global_exe(cmd);
+#ifdef FEAT_CLIPBOARD
+	    end_global_changes();
+#endif
+	}
+
+	ml_clearmarked();	   // clear rest of the marks
+    }
+
+    vim_regfree(regmatch.regprog);
+}
+
+/*
+ * Execute "cmd" on lines marked with ml_setmarked().
+ */
+    void
+global_exe(char_u *cmd)
+{
+    linenr_T old_lcount;	// b_ml.ml_line_count before the command
+    buf_T    *old_buf = curbuf;	// remember what buffer we started in
+    linenr_T lnum;		// line number according to old situation
+
+    /*
+     * Set current position only once for a global command.
+     * If global_busy is set, setpcmark() will not do anything.
+     * If there is an error, global_busy will be incremented.
+     */
+    setpcmark();
+
+    // When the command writes a message, don't overwrite the command.
+    msg_didout = TRUE;
+
+    sub_nsubs = 0;
+    sub_nlines = 0;
+    global_need_beginline = FALSE;
+    global_busy = 1;
+    old_lcount = curbuf->b_ml.ml_line_count;
+    while (!got_int && (lnum = ml_firstmarked()) != 0 && global_busy == 1)
+    {
+	global_exe_one(cmd, lnum);
+	ui_breakcheck();
+    }
+
+    global_busy = 0;
+    if (global_need_beginline)
+	beginline(BL_WHITE | BL_FIX);
+    else
+	check_cursor();	// cursor may be beyond the end of the line
+
+    // the cursor may not have moved in the text but a change in a previous
+    // line may move it on the screen
+    changed_line_abv_curs();
+
+    // If it looks like no message was written, allow overwriting the
+    // command with the report for number of changes.
+    if (msg_col == 0 && msg_scrolled == 0)
+	msg_didout = FALSE;
+
+    // If substitutes done, report number of substitutes, otherwise report
+    // number of extra or deleted lines.
+    // Don't report extra or deleted lines in the edge case where the buffer
+    // we are in after execution is different from the buffer we started in.
+    if (!do_sub_msg(FALSE) && curbuf == old_buf)
+	msgmore(curbuf->b_ml.ml_line_count - old_lcount);
+}
+
+#ifdef FEAT_VIMINFO
+/*
+ * Get the previous substitute pattern.
+ */
+    char_u *
+get_old_sub(void)
+{
+    return old_sub;
+}
+
+/*
+ * Set the previous substitute pattern.  "val" must be allocated.
+ */
+    void
+set_old_sub(char_u *val)
+{
+    vim_free(old_sub);
+    old_sub = val;
+}
+#endif // FEAT_VIMINFO
+
+#if defined(EXITFREE) || defined(PROTO)
+    void
+free_old_sub(void)
+{
+    vim_free(old_sub);
+}
+#endif
+
+#if defined(FEAT_QUICKFIX) || defined(PROTO)
+/*
+ * Set up for a tagpreview.
+ * Makes the preview window the current window.
+ * Return TRUE when it was created.
+ */
+    int
+prepare_tagpreview(
+    int		undo_sync,	    // sync undo when leaving the window
+    int		use_previewpopup,   // use popup if 'previewpopup' set
+    use_popup_T	use_popup)	    // use other popup window
+{
+    win_T	*wp;
+
+# ifdef FEAT_GUI
+    need_mouse_correct = TRUE;
+# endif
+
+    if (curwin->w_p_pvw)
+	return FALSE;
+
+    /*
+     * If there is already a preview window open, use that one.
+     */
+# ifdef FEAT_PROP_POPUP
+    if (use_previewpopup && *p_pvp != NUL)
+    {
+	wp = popup_find_preview_window();
+	if (wp != NULL)
+	    popup_set_wantpos_cursor(wp, wp->w_minwidth, NULL);
+    }
+    else if (use_popup != USEPOPUP_NONE)
+    {
+	wp = popup_find_info_window();
+	if (wp != NULL)
+	{
+	    if (use_popup == USEPOPUP_NORMAL)
+		popup_show(wp);
+	    else
+		popup_hide(wp);
+	    // When the popup moves or resizes it may reveal part of
+	    // another window.  TODO: can this be done more efficiently?
+	    redraw_all_later(UPD_NOT_VALID);
+	}
+    }
+    else
+# endif
+    {
+	FOR_ALL_WINDOWS(wp)
+	    if (wp->w_p_pvw)
+		break;
+    }
+    if (wp != NULL)
+    {
+	win_enter(wp, undo_sync);
+	return FALSE;
+    }
+
+    /*
+     * There is no preview window open yet.  Create one.
+     */
+# ifdef FEAT_PROP_POPUP
+    if ((use_previewpopup && *p_pvp != NUL)
+	    || use_popup != USEPOPUP_NONE)
+	return popup_create_preview_window(use_popup != USEPOPUP_NONE);
+# endif
+    if (win_split(g_do_tagpreview > 0 ? g_do_tagpreview : 0, 0) == FAIL)
+	return FALSE;
+    curwin->w_p_pvw = TRUE;
+    curwin->w_p_wfh = TRUE;
+    RESET_BINDING(curwin);	    // don't take over 'scrollbind'
+				    // and 'cursorbind'
+# ifdef FEAT_DIFF
+    curwin->w_p_diff = FALSE;	    // no 'diff'
+# endif
+# ifdef FEAT_FOLDING
+    curwin->w_p_fdc = 0;	    // no 'foldcolumn'
+# endif
+    return TRUE;
+}
+
+#endif
+
+/*
+ * Make the user happy.
+ */
+    void
+ex_smile(exarg_T *eap UNUSED)
+{
+    static char *code[] = {
+	"\34 \4o\14$\4ox\30 \2o\30$\1ox\25 \2o\36$\1o\11 \1o\1$\3 \2$\1 \1o\1$x\5 \1o\1 \1$\1 \2o\10 \1o\44$\1o\7 \2$\1 \2$\1 \2$\1o\1$x\2 \2o\1 \1$\1 \1$\1 \1\"\1$\6 \1o\11$\4 \15$\4 \11$\1o\7 \3$\1o\2$\1o\1$x\2 \1\"\6$\1o\1$\5 \1o\11$\6 \13$\6 \12$\1o\4 \10$x\4 \7$\4 \13$\6 \13$\6 \27$x\4 \27$\4 \15$\4 \16$\2 \3\"\3$x\5 \1\"\3$\4\"\61$\5 \1\"\3$x\6 \3$\3 \1o\62$\5 \1\"\3$\1ox\5 \1o\2$\1\"\3 \63$\7 \3$\1ox\5 \3$\4 \55$\1\"\1 \1\"\6$",
+	"\5o\4$\1ox\4 \1o\3$\4o\5$\2 \45$\3 \1o\21$x\4 \10$\1\"\4$\3 \42$\5 \4$\10\"x\3 \4\"\7 \4$\4 \1\"\34$\1\"\6 \1o\3$x\16 \1\"\3$\1o\5 \3\"\22$\1\"\2$\1\"\11 \3$x\20 \3$\1o\12 \1\"\2$\2\"\6$\4\"\13 \1o\3$x\21 \4$\1o\40 \1o\3$\1\"x\22 \1\"\4$\1o\6 \1o\6$\1o\1\"\4$\1o\10 \1o\4$x\24 \1\"\5$\2o\5 \2\"\4$\1o\5$\1o\3 \1o\4$\2\"x\27 \2\"\5$\4o\2 \1\"\3$\1o\11$\3\"x\32 \2\"\7$\2o\1 \12$x\42 \4\"\13$x\46 \14$x\47 \12$\1\"x\50 \1\"\3$\4\"x"
+    };
+    char *p;
+    int n;
+    int i;
+
+    msg_start();
+    msg_putchar('\n');
+    for (i = 0; i < 2; ++i)
+	for (p = code[i]; *p != NUL; ++p)
+	    if (*p == 'x')
+		msg_putchar('\n');
+	    else
+		for (n = *p++; n > 0; --n)
+		    if (*p == 'o' || *p == '$')
+			msg_putchar_attr(*p, HL_ATTR(HLF_L));
+		    else
+			msg_putchar(*p);
+    msg_clr_eos();
+}
+
+/*
+ * ":drop"
+ * Opens the first argument in a window.  When there are two or more arguments
+ * the argument list is redefined.
+ */
+    void
+ex_drop(exarg_T *eap)
+{
+    int		split = FALSE;
+    win_T	*wp;
+    buf_T	*buf;
+    tabpage_T	*tp;
+
+    if (ERROR_IF_POPUP_WINDOW || ERROR_IF_TERM_POPUP_WINDOW)
+	return;
+
+    /*
+     * Check if the first argument is already being edited in a window.  If
+     * so, jump to that window.
+     * We would actually need to check all arguments, but that's complicated
+     * and mostly only one file is dropped.
+     * This also ignores wildcards, since it is very unlikely the user is
+     * editing a file name with a wildcard character.
+     */
+    set_arglist(eap->arg);
+
+    /*
+     * Expanding wildcards may result in an empty argument list.  E.g. when
+     * editing "foo.pyc" and ".pyc" is in 'wildignore'.  Assume that we
+     * already did an error message for this.
+     */
+    if (ARGCOUNT == 0)
+	return;
+
+    if (cmdmod.cmod_tab)
+    {
+	// ":tab drop file ...": open a tab for each argument that isn't
+	// edited in a window yet.  It's like ":tab all" but without closing
+	// windows or tabs.
+	ex_all(eap);
+	return;
+    }
+
+    // ":drop file ...": Edit the first argument.  Jump to an existing
+    // window if possible, edit in current window if the current buffer
+    // can be abandoned, otherwise open a new window.
+    buf = buflist_findnr(ARGLIST[0].ae_fnum);
+
+    FOR_ALL_TAB_WINDOWS(tp, wp)
+    {
+	if (wp->w_buffer == buf)
+	{
+	    goto_tabpage_win(tp, wp);
+	    curwin->w_arg_idx = 0;
+	    if (!bufIsChanged(curbuf))
+	    {
+		int save_ar = curbuf->b_p_ar;
+
+		// reload the file if it is newer
+		curbuf->b_p_ar = TRUE;
+		buf_check_timestamp(curbuf, FALSE);
+		curbuf->b_p_ar = save_ar;
+	    }
+	    return;
+	}
+    }
+
+    /*
+     * Check whether the current buffer is changed. If so, we will need
+     * to split the current window or data could be lost.
+     * Skip the check if the 'hidden' option is set, as in this case the
+     * buffer won't be lost.
+     */
+    if (!buf_hide(curbuf))
+    {
+	++emsg_off;
+	split = check_changed(curbuf, CCGD_AW | CCGD_EXCMD);
+	--emsg_off;
+    }
+
+    // Fake a ":sfirst" or ":first" command edit the first argument.
+    if (split)
+    {
+	eap->cmdidx = CMD_sfirst;
+	eap->cmd[0] = 's';
+    }
+    else
+	eap->cmdidx = CMD_first;
+    ex_rewind(eap);
+}
+
+/*
+ * Skip over the pattern argument of ":vimgrep /pat/[g][j]".
+ * Put the start of the pattern in "*s", unless "s" is NULL.
+ * If "flags" is not NULL put the flags in it: VGR_GLOBAL, VGR_NOJUMP.
+ * If "s" is not NULL terminate the pattern with a NUL.
+ * Return a pointer to the char just past the pattern plus flags.
+ */
+    char_u *
+skip_vimgrep_pat(char_u *p, char_u **s, int *flags)
+{
+    return skip_vimgrep_pat_ext(p, s, flags, NULL, NULL);
+}
+
+/*
+ * As skip_vimgrep_pat() and store the character overwritten by NUL in "cp"
+ * and the pointer to it in "nulp".
+ */
+    char_u *
+skip_vimgrep_pat_ext(char_u *p, char_u **s, int *flags, char_u **nulp, int *cp)
+{
+    int		c;
+
+    if (vim_isIDc(*p))
+    {
+	// ":vimgrep pattern fname"
+	if (s != NULL)
+	    *s = p;
+	p = skiptowhite(p);
+	if (s != NULL && *p != NUL)
+	{
+	    if (nulp != NULL)
+	    {
+		*nulp = p;
+		*cp = *p;
+	    }
+	    *p++ = NUL;
+	}
+    }
+    else
+    {
+	// ":vimgrep /pattern/[g][j] fname"
+	if (s != NULL)
+	    *s = p + 1;
+	c = *p;
+	p = skip_regexp(p + 1, c, TRUE);
+	if (*p != c)
+	    return NULL;
+
+	// Truncate the pattern.
+	if (s != NULL)
+	{
+	    if (nulp != NULL)
+	    {
+		*nulp = p;
+		*cp = *p;
+	    }
+	    *p = NUL;
+	}
+	++p;
+
+	// Find the flags
+	while (*p == 'g' || *p == 'j' || *p == 'f')
+	{
+	    if (flags != NULL)
+	    {
+		if (*p == 'g')
+		    *flags |= VGR_GLOBAL;
+		else if (*p == 'j')
+		    *flags |= VGR_NOJUMP;
+		else
+		    *flags |= VGR_FUZZY;
+	    }
+	    ++p;
+	}
+    }
+    return p;
+}
+
+#if defined(FEAT_EVAL) || defined(PROTO)
+/*
+ * List v:oldfiles in a nice way.
+ */
+    void
+ex_oldfiles(exarg_T *eap UNUSED)
+{
+    list_T	*l = get_vim_var_list(VV_OLDFILES);
+    listitem_T	*li;
+    int		nr = 0;
+    char_u	*fname;
+
+    if (l == NULL)
+    {
+	msg(_("No old files"));
+	return;
+    }
+
+    msg_start();
+    msg_scroll = TRUE;
+    for (li = l->lv_first; li != NULL && !got_int; li = li->li_next)
+    {
+	++nr;
+	fname = tv_get_string(&li->li_tv);
+	if (!message_filtered(fname))
+	{
+	    msg_outnum((long)nr);
+	    msg_puts(": ");
+	    msg_outtrans(fname);
+	    msg_clr_eos();
+	    msg_putchar('\n');
+	    out_flush();	    // output one line at a time
+	    ui_breakcheck();
+	}
+    }
+
+    // Assume "got_int" was set to truncate the listing.
+    got_int = FALSE;
+
+# ifdef FEAT_BROWSE_CMD
+    if (cmdmod.cmod_flags & CMOD_BROWSE)
+    {
+	quit_more = FALSE;
+	nr = prompt_for_number(FALSE);
+	msg_starthere();
+	if (nr > 0)
+	{
+	    char_u *p = list_find_str(get_vim_var_list(VV_OLDFILES),
+		    (long)nr);
+
+	    if (p != NULL)
+	    {
+		p = expand_env_save(p);
+		eap->arg = p;
+		eap->cmdidx = CMD_edit;
+		cmdmod.cmod_flags &= ~CMOD_BROWSE;
+		do_exedit(eap, NULL);
+		vim_free(p);
+	    }
+	}
+    }
+# endif
+}
+#endif