path: root/src/ops.c

/* 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.
 */

/*
 * ops.c: implementation of various operators: op_shift, op_delete, op_tilde,
 *	  op_change, op_yank, do_put, do_join
 */

#include "vim.h"

static void shift_block(oparg_T *oap, int amount);
static void	mb_adjust_opend(oparg_T *oap);
static int	do_addsub(int op_type, pos_T *pos, int length, linenr_T Prenum1);
static int	ends_in_white(linenr_T lnum);
static int	fmt_check_par(linenr_T, int *, char_u **, int do_comments);

// Flags for third item in "opchars".
#define OPF_LINES  1	// operator always works on lines
#define OPF_CHANGE 2	// operator changes text

/*
 * The names of operators.
 * IMPORTANT: Index must correspond with defines in vim.h!!!
 * The third field holds OPF_ flags.
 */
static char opchars[][3] =
{
    {NUL, NUL, 0},			// OP_NOP
    {'d', NUL, OPF_CHANGE},		// OP_DELETE
    {'y', NUL, 0},			// OP_YANK
    {'c', NUL, OPF_CHANGE},		// OP_CHANGE
    {'<', NUL, OPF_LINES | OPF_CHANGE},	// OP_LSHIFT
    {'>', NUL, OPF_LINES | OPF_CHANGE},	// OP_RSHIFT
    {'!', NUL, OPF_LINES | OPF_CHANGE},	// OP_FILTER
    {'g', '~', OPF_CHANGE},		// OP_TILDE
    {'=', NUL, OPF_LINES | OPF_CHANGE},	// OP_INDENT
    {'g', 'q', OPF_LINES | OPF_CHANGE},	// OP_FORMAT
    {':', NUL, OPF_LINES},		// OP_COLON
    {'g', 'U', OPF_CHANGE},		// OP_UPPER
    {'g', 'u', OPF_CHANGE},		// OP_LOWER
    {'J', NUL, OPF_LINES | OPF_CHANGE},	// DO_JOIN
    {'g', 'J', OPF_LINES | OPF_CHANGE},	// DO_JOIN_NS
    {'g', '?', OPF_CHANGE},		// OP_ROT13
    {'r', NUL, OPF_CHANGE},		// OP_REPLACE
    {'I', NUL, OPF_CHANGE},		// OP_INSERT
    {'A', NUL, OPF_CHANGE},		// OP_APPEND
    {'z', 'f', OPF_LINES},		// OP_FOLD
    {'z', 'o', OPF_LINES},		// OP_FOLDOPEN
    {'z', 'O', OPF_LINES},		// OP_FOLDOPENREC
    {'z', 'c', OPF_LINES},		// OP_FOLDCLOSE
    {'z', 'C', OPF_LINES},		// OP_FOLDCLOSEREC
    {'z', 'd', OPF_LINES},		// OP_FOLDDEL
    {'z', 'D', OPF_LINES},		// OP_FOLDDELREC
    {'g', 'w', OPF_LINES | OPF_CHANGE},	// OP_FORMAT2
    {'g', '@', OPF_CHANGE},		// OP_FUNCTION
    {Ctrl_A, NUL, OPF_CHANGE},		// OP_NR_ADD
    {Ctrl_X, NUL, OPF_CHANGE},		// OP_NR_SUB
};

/*
 * Translate a command name into an operator type.
 * Must only be called with a valid operator name!
 */
    int
get_op_type(int char1, int char2)
{
    int		i;

    if (char1 == 'r')		/* ignore second character */
	return OP_REPLACE;
    if (char1 == '~')		/* when tilde is an operator */
	return OP_TILDE;
    if (char1 == 'g' && char2 == Ctrl_A)	/* add */
	return OP_NR_ADD;
    if (char1 == 'g' && char2 == Ctrl_X)	/* subtract */
	return OP_NR_SUB;
    for (i = 0; ; ++i)
    {
	if (opchars[i][0] == char1 && opchars[i][1] == char2)
	    break;
	if (i == (int)(sizeof(opchars) / sizeof(char [3]) - 1))
	{
	    internal_error("get_op_type()");
	    break;
	}
    }
    return i;
}

/*
 * Return TRUE if operator "op" always works on whole lines.
 */
    static int
op_on_lines(int op)
{
    return opchars[op][2] & OPF_LINES;
}

#if defined(FEAT_JOB_CHANNEL) || defined(PROTO)
/*
 * Return TRUE if operator "op" changes text.
 */
    int
op_is_change(int op)
{
    return opchars[op][2] & OPF_CHANGE;
}
#endif

/*
 * Get first operator command character.
 * Returns 'g' or 'z' if there is another command character.
 */
    int
get_op_char(int optype)
{
    return opchars[optype][0];
}

/*
 * Get second operator command character.
 */
    int
get_extra_op_char(int optype)
{
    return opchars[optype][1];
}

/*
 * op_shift - handle a shift operation
 */
    void
op_shift(oparg_T *oap, int curs_top, int amount)
{
    long	    i;
    int		    first_char;
    int		    block_col = 0;

    if (u_save((linenr_T)(oap->start.lnum - 1),
				       (linenr_T)(oap->end.lnum + 1)) == FAIL)
	return;

    if (oap->block_mode)
	block_col = curwin->w_cursor.col;

    for (i = oap->line_count; --i >= 0; )
    {
	first_char = *ml_get_curline();
	if (first_char == NUL)				/* empty line */
	    curwin->w_cursor.col = 0;
	else if (oap->block_mode)
	    shift_block(oap, amount);
	else
	    /* Move the line right if it doesn't start with '#', 'smartindent'
	     * isn't set or 'cindent' isn't set or '#' isn't in 'cino'. */
#if defined(FEAT_SMARTINDENT) || defined(FEAT_CINDENT)
	    if (first_char != '#' || !preprocs_left())
#endif
	    shift_line(oap->op_type == OP_LSHIFT, p_sr, amount, FALSE);
	++curwin->w_cursor.lnum;
    }

    changed_lines(oap->start.lnum, 0, oap->end.lnum + 1, 0L);
    if (oap->block_mode)
    {
	curwin->w_cursor.lnum = oap->start.lnum;
	curwin->w_cursor.col = block_col;
    }
    else if (curs_top)	    /* put cursor on first line, for ">>" */
    {
	curwin->w_cursor.lnum = oap->start.lnum;
	beginline(BL_SOL | BL_FIX);   /* shift_line() may have set cursor.col */
    }
    else
	--curwin->w_cursor.lnum;	/* put cursor on last line, for ":>" */

#ifdef FEAT_FOLDING
    /* The cursor line is not in a closed fold */
    foldOpenCursor();
#endif


    if (oap->line_count > p_report)
    {
	char	    *op;
	char	    *msg_line_single;
	char	    *msg_line_plural;

	if (oap->op_type == OP_RSHIFT)
	    op = ">";
	else
	    op = "<";
	msg_line_single = NGETTEXT("%ld line %sed %d time",
					     "%ld line %sed %d times", amount);
	msg_line_plural = NGETTEXT("%ld lines %sed %d time",
					    "%ld lines %sed %d times", amount);
	vim_snprintf((char *)IObuff, IOSIZE,
		NGETTEXT(msg_line_single, msg_line_plural, oap->line_count),
		oap->line_count, op, amount);
	msg((char *)IObuff);
    }

    /*
     * Set "'[" and "']" marks.
     */
    curbuf->b_op_start = oap->start;
    curbuf->b_op_end.lnum = oap->end.lnum;
    curbuf->b_op_end.col = (colnr_T)STRLEN(ml_get(oap->end.lnum));
    if (curbuf->b_op_end.col > 0)
	--curbuf->b_op_end.col;
}

/*
 * Shift the current line one shiftwidth left (if left != 0) or right
 * leaves cursor on first blank in the line.
 */
    void
shift_line(
    int	left,
    int	round,
    int	amount,
    int call_changed_bytes)	// call changed_bytes()
{
    int		count;
    int		i, j;
    int		sw_val = (int)get_sw_value_indent(curbuf);

    count = get_indent();	// get current indent

    if (round)			// round off indent
    {
	i = count / sw_val;	// number of 'shiftwidth' rounded down
	j = count % sw_val;	// extra spaces
	if (j && left)		// first remove extra spaces
	    --amount;
	if (left)
	{
	    i -= amount;
	    if (i < 0)
		i = 0;
	}
	else
	    i += amount;
	count = i * sw_val;
    }
    else		// original vi indent
    {
	if (left)
	{
	    count -= sw_val * amount;
	    if (count < 0)
		count = 0;
	}
	else
	    count += sw_val * amount;
    }

    // Set new indent
    if (State & VREPLACE_FLAG)
	change_indent(INDENT_SET, count, FALSE, NUL, call_changed_bytes);
    else
	(void)set_indent(count, call_changed_bytes ? SIN_CHANGED : 0);
}

/*
 * Shift one line of the current block one shiftwidth right or left.
 * Leaves cursor on first character in block.
 */
    static void
shift_block(oparg_T *oap, int amount)
{
    int			left = (oap->op_type == OP_LSHIFT);
    int			oldstate = State;
    int			total;
    char_u		*newp, *oldp;
    int			oldcol = curwin->w_cursor.col;
    int			sw_val = (int)get_sw_value_indent(curbuf);
    int			ts_val = (int)curbuf->b_p_ts;
    struct block_def	bd;
    int			incr;
    colnr_T		ws_vcol;
    int			i = 0, j = 0;
    int			len;
#ifdef FEAT_RIGHTLEFT
    int			old_p_ri = p_ri;

    p_ri = 0;			/* don't want revins in indent */
#endif

    State = INSERT;		/* don't want REPLACE for State */
    block_prep(oap, &bd, curwin->w_cursor.lnum, TRUE);
    if (bd.is_short)
	return;

    /* total is number of screen columns to be inserted/removed */
    total = (int)((unsigned)amount * (unsigned)sw_val);
    if ((total / sw_val) != amount)
	return; /* multiplication overflow */

    oldp = ml_get_curline();

    if (!left)
    {
	/*
	 *  1. Get start vcol
	 *  2. Total ws vcols
	 *  3. Divvy into TABs & spp
	 *  4. Construct new string
	 */
	total += bd.pre_whitesp; /* all virtual WS upto & incl a split TAB */
	ws_vcol = bd.start_vcol - bd.pre_whitesp;
	if (bd.startspaces)
	{
	    if (has_mbyte)
	    {
		if ((*mb_ptr2len)(bd.textstart) == 1)
		    ++bd.textstart;
		else
		{
		    ws_vcol = 0;
		    bd.startspaces = 0;
		}
	    }
	    else
		++bd.textstart;
	}
	for ( ; VIM_ISWHITE(*bd.textstart); )
	{
	    /* TODO: is passing bd.textstart for start of the line OK? */
	    incr = lbr_chartabsize_adv(bd.textstart, &bd.textstart,
						    (colnr_T)(bd.start_vcol));
	    total += incr;
	    bd.start_vcol += incr;
	}
	/* OK, now total=all the VWS reqd, and textstart points at the 1st
	 * non-ws char in the block. */
#ifdef FEAT_VARTABS
	if (!curbuf->b_p_et)
	    tabstop_fromto(ws_vcol, ws_vcol + total,
					ts_val, curbuf->b_p_vts_array, &i, &j);
	else
	    j = total;
#else
	if (!curbuf->b_p_et)
	    i = ((ws_vcol % ts_val) + total) / ts_val; /* number of tabs */
	if (i)
	    j = ((ws_vcol % ts_val) + total) % ts_val; /* number of spp */
	else
	    j = total;
#endif
	/* if we're splitting a TAB, allow for it */
	bd.textcol -= bd.pre_whitesp_c - (bd.startspaces != 0);
	len = (int)STRLEN(bd.textstart) + 1;
	newp = alloc(bd.textcol + i + j + len);
	if (newp == NULL)
	    return;
	vim_memset(newp, NUL, (size_t)(bd.textcol + i + j + len));
	mch_memmove(newp, oldp, (size_t)bd.textcol);
	vim_memset(newp + bd.textcol, TAB, (size_t)i);
	vim_memset(newp + bd.textcol + i, ' ', (size_t)j);
	/* the end */
	mch_memmove(newp + bd.textcol + i + j, bd.textstart, (size_t)len);
    }
    else /* left */
    {
	colnr_T	    destination_col;	/* column to which text in block will
					   be shifted */
	char_u	    *verbatim_copy_end;	/* end of the part of the line which is
					   copied verbatim */
	colnr_T	    verbatim_copy_width;/* the (displayed) width of this part
					   of line */
	unsigned    fill;		/* nr of spaces that replace a TAB */
	unsigned    new_line_len;	/* the length of the line after the
					   block shift */
	size_t	    block_space_width;
	size_t	    shift_amount;
	char_u	    *non_white = bd.textstart;
	colnr_T	    non_white_col;

	/*
	 * Firstly, let's find the first non-whitespace character that is
	 * displayed after the block's start column and the character's column
	 * number. Also, let's calculate the width of all the whitespace
	 * characters that are displayed in the block and precede the searched
	 * non-whitespace character.
	 */

	/* If "bd.startspaces" is set, "bd.textstart" points to the character,
	 * the part of which is displayed at the block's beginning. Let's start
	 * searching from the next character. */
	if (bd.startspaces)
	    MB_PTR_ADV(non_white);

	/* The character's column is in "bd.start_vcol".  */
	non_white_col = bd.start_vcol;

	while (VIM_ISWHITE(*non_white))
	{
	    incr = lbr_chartabsize_adv(bd.textstart, &non_white, non_white_col);
	    non_white_col += incr;
	}

	block_space_width = non_white_col - oap->start_vcol;
	/* We will shift by "total" or "block_space_width", whichever is less.
	 */
	shift_amount = (block_space_width < (size_t)total
					 ? block_space_width : (size_t)total);

	/* The column to which we will shift the text.  */
	destination_col = (colnr_T)(non_white_col - shift_amount);

	/* Now let's find out how much of the beginning of the line we can
	 * reuse without modification.  */
	verbatim_copy_end = bd.textstart;
	verbatim_copy_width = bd.start_vcol;

	/* If "bd.startspaces" is set, "bd.textstart" points to the character
	 * preceding the block. We have to subtract its width to obtain its
	 * column number.  */
	if (bd.startspaces)
	    verbatim_copy_width -= bd.start_char_vcols;
	while (verbatim_copy_width < destination_col)
	{
	    char_u *line = verbatim_copy_end;

	    /* TODO: is passing verbatim_copy_end for start of the line OK? */
	    incr = lbr_chartabsize(line, verbatim_copy_end,
							 verbatim_copy_width);
	    if (verbatim_copy_width + incr > destination_col)
		break;
	    verbatim_copy_width += incr;
	    MB_PTR_ADV(verbatim_copy_end);
	}

	/* If "destination_col" is different from the width of the initial
	 * part of the line that will be copied, it means we encountered a tab
	 * character, which we will have to partly replace with spaces.  */
	fill = destination_col - verbatim_copy_width;

	/* The replacement line will consist of:
	 * - the beginning of the original line up to "verbatim_copy_end",
	 * - "fill" number of spaces,
	 * - the rest of the line, pointed to by non_white.  */
	new_line_len = (unsigned)(verbatim_copy_end - oldp)
		       + fill
		       + (unsigned)STRLEN(non_white) + 1;

	newp = alloc(new_line_len);
	if (newp == NULL)
	    return;
	mch_memmove(newp, oldp, (size_t)(verbatim_copy_end - oldp));
	vim_memset(newp + (verbatim_copy_end - oldp), ' ', (size_t)fill);
	STRMOVE(newp + (verbatim_copy_end - oldp) + fill, non_white);
    }
    /* replace the line */
    ml_replace(curwin->w_cursor.lnum, newp, FALSE);
    changed_bytes(curwin->w_cursor.lnum, (colnr_T)bd.textcol);
    State = oldstate;
    curwin->w_cursor.col = oldcol;
#ifdef FEAT_RIGHTLEFT
    p_ri = old_p_ri;
#endif
}

/*
 * Insert string "s" (b_insert ? before : after) block :AKelly
 * Caller must prepare for undo.
 */
    static void
block_insert(
    oparg_T		*oap,
    char_u		*s,
    int			b_insert,
    struct block_def	*bdp)
{
    int		ts_val;
    int		count = 0;	/* extra spaces to replace a cut TAB */
    int		spaces = 0;	/* non-zero if cutting a TAB */
    colnr_T	offset;		/* pointer along new line */
    unsigned	s_len;		/* STRLEN(s) */
    char_u	*newp, *oldp;	/* new, old lines */
    linenr_T	lnum;		/* loop var */
    int		oldstate = State;

    State = INSERT;		/* don't want REPLACE for State */
    s_len = (unsigned)STRLEN(s);

    for (lnum = oap->start.lnum + 1; lnum <= oap->end.lnum; lnum++)
    {
	block_prep(oap, bdp, lnum, TRUE);
	if (bdp->is_short && b_insert)
	    continue;	/* OP_INSERT, line ends before block start */

	oldp = ml_get(lnum);

	if (b_insert)
	{
	    ts_val = bdp->start_char_vcols;
	    spaces = bdp->startspaces;
	    if (spaces != 0)
		count = ts_val - 1; /* we're cutting a TAB */
	    offset = bdp->textcol;
	}
	else /* append */
	{
	    ts_val = bdp->end_char_vcols;
	    if (!bdp->is_short) /* spaces = padding after block */
	    {
		spaces = (bdp->endspaces ? ts_val - bdp->endspaces : 0);
		if (spaces != 0)
		    count = ts_val - 1; /* we're cutting a TAB */
		offset = bdp->textcol + bdp->textlen - (spaces != 0);
	    }
	    else /* spaces = padding to block edge */
	    {
		/* if $ used, just append to EOL (ie spaces==0) */
		if (!bdp->is_MAX)
		    spaces = (oap->end_vcol - bdp->end_vcol) + 1;
		count = spaces;
		offset = bdp->textcol + bdp->textlen;
	    }
	}

	if (has_mbyte && spaces > 0)
	{
	    int off;

	    /* Avoid starting halfway a multi-byte character. */
	    if (b_insert)
	    {
		off = (*mb_head_off)(oldp, oldp + offset + spaces);
	    }
	    else
	    {
		off = (*mb_off_next)(oldp, oldp + offset);
		offset += off;
	    }
	    spaces -= off;
	    count -= off;
	}

	newp = alloc(STRLEN(oldp) + s_len + count + 1);
	if (newp == NULL)
	    continue;

	/* copy up to shifted part */
	mch_memmove(newp, oldp, (size_t)(offset));
	oldp += offset;

	/* insert pre-padding */
	vim_memset(newp + offset, ' ', (size_t)spaces);

	/* copy the new text */
	mch_memmove(newp + offset + spaces, s, (size_t)s_len);
	offset += s_len;

	if (spaces && !bdp->is_short)
	{
	    /* insert post-padding */
	    vim_memset(newp + offset + spaces, ' ', (size_t)(ts_val - spaces));
	    /* We're splitting a TAB, don't copy it. */
	    oldp++;
	    /* We allowed for that TAB, remember this now */
	    count++;
	}

	if (spaces > 0)
	    offset += count;
	STRMOVE(newp + offset, oldp);

	ml_replace(lnum, newp, FALSE);

	if (lnum == oap->end.lnum)
	{
	    /* Set "']" mark to the end of the block instead of the end of
	     * the insert in the first line.  */
	    curbuf->b_op_end.lnum = oap->end.lnum;
	    curbuf->b_op_end.col = offset;
	}
    } /* for all lnum */

    changed_lines(oap->start.lnum + 1, 0, oap->end.lnum + 1, 0L);

    State = oldstate;
}

/*
 * Stuff a string into the typeahead buffer, such that edit() will insert it
 * literally ("literally" TRUE) or interpret is as typed characters.
 */
    void
stuffescaped(char_u *arg, int literally)
{
    int		c;
    char_u	*start;

    while (*arg != NUL)
    {
	/* Stuff a sequence of normal ASCII characters, that's fast.  Also
	 * stuff K_SPECIAL to get the effect of a special key when "literally"
	 * is TRUE. */
	start = arg;
	while ((*arg >= ' '
#ifndef EBCDIC
		    && *arg < DEL /* EBCDIC: chars above space are normal */
#endif
		    )
		|| (*arg == K_SPECIAL && !literally))
	    ++arg;
	if (arg > start)
	    stuffReadbuffLen(start, (long)(arg - start));

	/* stuff a single special character */
	if (*arg != NUL)
	{
	    if (has_mbyte)
		c = mb_cptr2char_adv(&arg);
	    else
		c = *arg++;
	    if (literally && ((c < ' ' && c != TAB) || c == DEL))
		stuffcharReadbuff(Ctrl_V);
	    stuffcharReadbuff(c);
	}
    }
}

/*
 * Handle a delete operation.
 *
 * Return FAIL if undo failed, OK otherwise.
 */
    int
op_delete(oparg_T *oap)
{
    int			n;
    linenr_T		lnum;
    char_u		*ptr;
    char_u		*newp, *oldp;
    struct block_def	bd;
    linenr_T		old_lcount = curbuf->b_ml.ml_line_count;
    int			did_yank = FALSE;

    if (curbuf->b_ml.ml_flags & ML_EMPTY)	    /* nothing to do */
	return OK;

    /* Nothing to delete, return here.	Do prepare undo, for op_change(). */
    if (oap->empty)
	return u_save_cursor();

    if (!curbuf->b_p_ma)
    {
	emsg(_(e_modifiable));
	return FAIL;
    }

#ifdef FEAT_CLIPBOARD
    adjust_clip_reg(&oap->regname);
#endif

    if (has_mbyte)
	mb_adjust_opend(oap);

    /*
     * Imitate the strange Vi behaviour: If the delete spans more than one
     * line and motion_type == MCHAR and the result is a blank line, make the
     * delete linewise.  Don't do this for the change command or Visual mode.
     */
    if (       oap->motion_type == MCHAR
	    && !oap->is_VIsual
	    && !oap->block_mode
	    && oap->line_count > 1
	    && oap->motion_force == NUL
	    && oap->op_type == OP_DELETE)
    {
	ptr = ml_get(oap->end.lnum) + oap->end.col;
	if (*ptr != NUL)
	    ptr += oap->inclusive;
	ptr = skipwhite(ptr);
	if (*ptr == NUL && inindent(0))
	    oap->motion_type = MLINE;
    }

    /*
     * Check for trying to delete (e.g. "D") in an empty line.
     * Note: For the change operator it is ok.
     */
    if (       oap->motion_type == MCHAR
	    && oap->line_count == 1
	    && oap->op_type == OP_DELETE
	    && *ml_get(oap->start.lnum) == NUL)
    {
	/*
	 * It's an error to operate on an empty region, when 'E' included in
	 * 'cpoptions' (Vi compatible).
	 */
	if (virtual_op)
	    /* Virtual editing: Nothing gets deleted, but we set the '[ and ']
	     * marks as if it happened. */
	    goto setmarks;
	if (vim_strchr(p_cpo, CPO_EMPTYREGION) != NULL)
	    beep_flush();
	return OK;
    }

    /*
     * Do a yank of whatever we're about to delete.
     * If a yank register was specified, put the deleted text into that
     * register.  For the black hole register '_' don't yank anything.
     */
    if (oap->regname != '_')
    {
	if (oap->regname != 0)
	{
	    /* check for read-only register */
	    if (!valid_yank_reg(oap->regname, TRUE))
	    {
		beep_flush();
		return OK;
	    }
	    get_yank_register(oap->regname, TRUE); /* yank into specif'd reg. */
	    if (op_yank(oap, TRUE, FALSE) == OK)   /* yank without message */
		did_yank = TRUE;
	}

	/*
	 * Put deleted text into register 1 and shift number registers if the
	 * delete contains a line break, or when using a specific operator (Vi
	 * compatible)
	 * Use the register name from before adjust_clip_reg() may have
	 * changed it.
	 */
	if (oap->motion_type == MLINE || oap->line_count > 1
							   || oap->use_reg_one)
	{
	    shift_delete_registers();
	    if (op_yank(oap, TRUE, FALSE) == OK)
		did_yank = TRUE;
	}

	/* Yank into small delete register when no named register specified
	 * and the delete is within one line. */
	if ((
#ifdef FEAT_CLIPBOARD
	    ((clip_unnamed & CLIP_UNNAMED) && oap->regname == '*') ||
	    ((clip_unnamed & CLIP_UNNAMED_PLUS) && oap->regname == '+') ||
#endif
	    oap->regname == 0) && oap->motion_type != MLINE
						      && oap->line_count == 1)
	{
	    oap->regname = '-';
	    get_yank_register(oap->regname, TRUE);
	    if (op_yank(oap, TRUE, FALSE) == OK)
		did_yank = TRUE;
	    oap->regname = 0;
	}

	/*
	 * If there's too much stuff to fit in the yank register, then get a
	 * confirmation before doing the delete. This is crude, but simple.
	 * And it avoids doing a delete of something we can't put back if we
	 * want.
	 */
	if (!did_yank)
	{
	    int msg_silent_save = msg_silent;

	    msg_silent = 0;	/* must display the prompt */
	    n = ask_yesno((char_u *)_("cannot yank; delete anyway"), TRUE);
	    msg_silent = msg_silent_save;
	    if (n != 'y')
	    {
		emsg(_(e_abort));
		return FAIL;
	    }
	}

#if defined(FEAT_EVAL)
	if (did_yank && has_textyankpost())
	    yank_do_autocmd(oap, get_y_current());
#endif
    }

    /*
     * block mode delete
     */
    if (oap->block_mode)
    {
	if (u_save((linenr_T)(oap->start.lnum - 1),
			       (linenr_T)(oap->end.lnum + 1)) == FAIL)
	    return FAIL;

	for (lnum = curwin->w_cursor.lnum; lnum <= oap->end.lnum; ++lnum)
	{
	    block_prep(oap, &bd, lnum, TRUE);
	    if (bd.textlen == 0)	/* nothing to delete */
		continue;

	    /* Adjust cursor position for tab replaced by spaces and 'lbr'. */
	    if (lnum == curwin->w_cursor.lnum)
	    {
		curwin->w_cursor.col = bd.textcol + bd.startspaces;
		curwin->w_cursor.coladd = 0;
	    }

	    // "n" == number of chars deleted
	    // If we delete a TAB, it may be replaced by several characters.
	    // Thus the number of characters may increase!
	    n = bd.textlen - bd.startspaces - bd.endspaces;
	    oldp = ml_get(lnum);
	    newp = alloc(STRLEN(oldp) + 1 - n);
	    if (newp == NULL)
		continue;
	    /* copy up to deleted part */
	    mch_memmove(newp, oldp, (size_t)bd.textcol);
	    /* insert spaces */
	    vim_memset(newp + bd.textcol, ' ',
				     (size_t)(bd.startspaces + bd.endspaces));
	    /* copy the part after the deleted part */
	    oldp += bd.textcol + bd.textlen;
	    STRMOVE(newp + bd.textcol + bd.startspaces + bd.endspaces, oldp);
	    /* replace the line */
	    ml_replace(lnum, newp, FALSE);

#ifdef FEAT_TEXT_PROP
	    if (curbuf->b_has_textprop && n != 0)
		adjust_prop_columns(lnum, bd.textcol, -n, 0);
#endif
	}

	check_cursor_col();
	changed_lines(curwin->w_cursor.lnum, curwin->w_cursor.col,
						       oap->end.lnum + 1, 0L);
	oap->line_count = 0;	    /* no lines deleted */
    }
    else if (oap->motion_type == MLINE)
    {
	if (oap->op_type == OP_CHANGE)
	{
	    /* Delete the lines except the first one.  Temporarily move the
	     * cursor to the next line.  Save the current line number, if the
	     * last line is deleted it may be changed.
	     */
	    if (oap->line_count > 1)
	    {
		lnum = curwin->w_cursor.lnum;
		++curwin->w_cursor.lnum;
		del_lines((long)(oap->line_count - 1), TRUE);
		curwin->w_cursor.lnum = lnum;
	    }
	    if (u_save_cursor() == FAIL)
		return FAIL;
	    if (curbuf->b_p_ai)		    /* don't delete indent */
	    {
		beginline(BL_WHITE);	    /* cursor on first non-white */
		did_ai = TRUE;		    /* delete the indent when ESC hit */
		ai_col = curwin->w_cursor.col;
	    }
	    else
		beginline(0);		    /* cursor in column 0 */
	    truncate_line(FALSE);   /* delete the rest of the line */
				    /* leave cursor past last char in line */
	    if (oap->line_count > 1)
		u_clearline();	    /* "U" command not possible after "2cc" */
	}
	else
	{
	    del_lines(oap->line_count, TRUE);
	    beginline(BL_WHITE | BL_FIX);
	    u_clearline();	/* "U" command not possible after "dd" */
	}
    }
    else
    {
	if (virtual_op)
	{
	    int		endcol = 0;

	    /* For virtualedit: break the tabs that are partly included. */
	    if (gchar_pos(&oap->start) == '\t')
	    {
		if (u_save_cursor() == FAIL)	/* save first line for undo */
		    return FAIL;
		if (oap->line_count == 1)
		    endcol = getviscol2(oap->end.col, oap->end.coladd);
		coladvance_force(getviscol2(oap->start.col, oap->start.coladd));
		oap->start = curwin->w_cursor;
		if (oap->line_count == 1)
		{
		    coladvance(endcol);
		    oap->end.col = curwin->w_cursor.col;
		    oap->end.coladd = curwin->w_cursor.coladd;
		    curwin->w_cursor = oap->start;
		}
	    }

	    /* Break a tab only when it's included in the area. */
	    if (gchar_pos(&oap->end) == '\t'
				     && (int)oap->end.coladd < oap->inclusive)
	    {
		/* save last line for undo */
		if (u_save((linenr_T)(oap->end.lnum - 1),
				       (linenr_T)(oap->end.lnum + 1)) == FAIL)
		    return FAIL;
		curwin->w_cursor = oap->end;
		coladvance_force(getviscol2(oap->end.col, oap->end.coladd));
		oap->end = curwin->w_cursor;
		curwin->w_cursor = oap->start;
	    }
	}

	if (oap->line_count == 1)	/* delete characters within one line */
	{
	    if (u_save_cursor() == FAIL)	/* save line for undo */
		return FAIL;

	    /* if 'cpoptions' contains '$', display '$' at end of change */
	    if (       vim_strchr(p_cpo, CPO_DOLLAR) != NULL
		    && oap->op_type == OP_CHANGE
		    && oap->end.lnum == curwin->w_cursor.lnum
		    && !oap->is_VIsual)
		display_dollar(oap->end.col - !oap->inclusive);

	    n = oap->end.col - oap->start.col + 1 - !oap->inclusive;

	    if (virtual_op)
	    {
		/* fix up things for virtualedit-delete:
		 * break the tabs which are going to get in our way
		 */
		char_u		*curline = ml_get_curline();
		int		len = (int)STRLEN(curline);

		if (oap->end.coladd != 0
			&& (int)oap->end.col >= len - 1
			&& !(oap->start.coladd && (int)oap->end.col >= len - 1))
		    n++;
		/* Delete at least one char (e.g, when on a control char). */
		if (n == 0 && oap->start.coladd != oap->end.coladd)
		    n = 1;

		/* When deleted a char in the line, reset coladd. */
		if (gchar_cursor() != NUL)
		    curwin->w_cursor.coladd = 0;
	    }
	    (void)del_bytes((long)n, !virtual_op,
			    oap->op_type == OP_DELETE && !oap->is_VIsual);
	}
	else				/* delete characters between lines */
	{
	    pos_T   curpos;

	    /* save deleted and changed lines for undo */
	    if (u_save((linenr_T)(curwin->w_cursor.lnum - 1),
		 (linenr_T)(curwin->w_cursor.lnum + oap->line_count)) == FAIL)
		return FAIL;

	    truncate_line(TRUE);	/* delete from cursor to end of line */

	    curpos = curwin->w_cursor;	/* remember curwin->w_cursor */
	    ++curwin->w_cursor.lnum;
	    del_lines((long)(oap->line_count - 2), FALSE);

	    /* delete from start of line until op_end */
	    n = (oap->end.col + 1 - !oap->inclusive);
	    curwin->w_cursor.col = 0;
	    (void)del_bytes((long)n, !virtual_op,
			    oap->op_type == OP_DELETE && !oap->is_VIsual);
	    curwin->w_cursor = curpos;	/* restore curwin->w_cursor */
	    (void)do_join(2, FALSE, FALSE, FALSE, FALSE);
	}
    }

    msgmore(curbuf->b_ml.ml_line_count - old_lcount);

setmarks:
    if (oap->block_mode)
    {
	curbuf->b_op_end.lnum = oap->end.lnum;
	curbuf->b_op_end.col = oap->start.col;
    }
    else
	curbuf->b_op_end = oap->start;
    curbuf->b_op_start = oap->start;

    return OK;
}

/*
 * Adjust end of operating area for ending on a multi-byte character.
 * Used for deletion.
 */
    static void
mb_adjust_opend(oparg_T *oap)
{
    char_u	*p;

    if (oap->inclusive)
    {
	p = ml_get(oap->end.lnum);
	oap->end.col += mb_tail_off(p, p + oap->end.col);
    }
}

/*
 * Replace the character under the cursor with "c".
 * This takes care of multi-byte characters.
 */
    static void
replace_character(int c)
{
    int n = State;

    State = REPLACE;
    ins_char(c);
    State = n;
    /* Backup to the replaced character. */
    dec_cursor();
}

/*
 * Replace a whole area with one character.
 */
    int
op_replace(oparg_T *oap, int c)
{
    int			n, numc;
    int			num_chars;
    char_u		*newp, *oldp;
    size_t		oldlen;
    struct block_def	bd;
    char_u		*after_p = NULL;
    int			had_ctrl_v_cr = FALSE;

    if ((curbuf->b_ml.ml_flags & ML_EMPTY ) || oap->empty)
	return OK;	    /* nothing to do */

    if (c == REPLACE_CR_NCHAR)
    {
	had_ctrl_v_cr = TRUE;
	c = CAR;
    }
    else if (c == REPLACE_NL_NCHAR)
    {
	had_ctrl_v_cr = TRUE;
	c = NL;
    }

    if (has_mbyte)
	mb_adjust_opend(oap);

    if (u_save((linenr_T)(oap->start.lnum - 1),
				       (linenr_T)(oap->end.lnum + 1)) == FAIL)
	return FAIL;

    /*
     * block mode replace
     */
    if (oap->block_mode)
    {
	bd.is_MAX = (curwin->w_curswant == MAXCOL);
	for ( ; curwin->w_cursor.lnum <= oap->end.lnum; ++curwin->w_cursor.lnum)
	{
	    curwin->w_cursor.col = 0;  /* make sure cursor position is valid */
	    block_prep(oap, &bd, curwin->w_cursor.lnum, TRUE);
	    if (bd.textlen == 0 && (!virtual_op || bd.is_MAX))
		continue;	    /* nothing to replace */

	    /* n == number of extra chars required
	     * If we split a TAB, it may be replaced by several characters.
	     * Thus the number of characters may increase!
	     */
	    /* If the range starts in virtual space, count the initial
	     * coladd offset as part of "startspaces" */
	    if (virtual_op && bd.is_short && *bd.textstart == NUL)
	    {
		pos_T vpos;

		vpos.lnum = curwin->w_cursor.lnum;
		getvpos(&vpos, oap->start_vcol);
		bd.startspaces += vpos.coladd;
		n = bd.startspaces;
	    }
	    else
		/* allow for pre spaces */
		n = (bd.startspaces ? bd.start_char_vcols - 1 : 0);

	    /* allow for post spp */
	    n += (bd.endspaces
		    && !bd.is_oneChar
		    && bd.end_char_vcols > 0) ? bd.end_char_vcols - 1 : 0;
	    /* Figure out how many characters to replace. */
	    numc = oap->end_vcol - oap->start_vcol + 1;
	    if (bd.is_short && (!virtual_op || bd.is_MAX))
		numc -= (oap->end_vcol - bd.end_vcol) + 1;

	    /* A double-wide character can be replaced only up to half the
	     * times. */
	    if ((*mb_char2cells)(c) > 1)
	    {
		if ((numc & 1) && !bd.is_short)
		{
		    ++bd.endspaces;
		    ++n;
		}
		numc = numc / 2;
	    }

	    /* Compute bytes needed, move character count to num_chars. */
	    num_chars = numc;
	    numc *= (*mb_char2len)(c);
	    /* oldlen includes textlen, so don't double count */
	    n += numc - bd.textlen;

	    oldp = ml_get_curline();
	    oldlen = STRLEN(oldp);
	    newp = alloc(oldlen + 1 + n);
	    if (newp == NULL)
		continue;
	    vim_memset(newp, NUL, (size_t)(oldlen + 1 + n));
	    /* copy up to deleted part */
	    mch_memmove(newp, oldp, (size_t)bd.textcol);
	    oldp += bd.textcol + bd.textlen;
	    /* insert pre-spaces */
	    vim_memset(newp + bd.textcol, ' ', (size_t)bd.startspaces);
	    /* insert replacement chars CHECK FOR ALLOCATED SPACE */
	    /* REPLACE_CR_NCHAR/REPLACE_NL_NCHAR is used for entering CR
	     * literally. */
	    if (had_ctrl_v_cr || (c != '\r' && c != '\n'))
	    {
		if (has_mbyte)
		{
		    n = (int)STRLEN(newp);
		    while (--num_chars >= 0)
			n += (*mb_char2bytes)(c, newp + n);
		}
		else
		    vim_memset(newp + STRLEN(newp), c, (size_t)numc);
		if (!bd.is_short)
		{
		    /* insert post-spaces */
		    vim_memset(newp + STRLEN(newp), ' ', (size_t)bd.endspaces);
		    /* copy the part after the changed part */
		    STRMOVE(newp + STRLEN(newp), oldp);
		}
	    }
	    else
	    {
		/* Replacing with \r or \n means splitting the line. */
		after_p = alloc(oldlen + 1 + n - STRLEN(newp));
		if (after_p != NULL)
		    STRMOVE(after_p, oldp);
	    }
	    /* replace the line */
	    ml_replace(curwin->w_cursor.lnum, newp, FALSE);
	    if (after_p != NULL)
	    {
		ml_append(curwin->w_cursor.lnum++, after_p, 0, FALSE);
		appended_lines_mark(curwin->w_cursor.lnum, 1L);
		oap->end.lnum++;
		vim_free(after_p);
	    }
	}
    }
    else
    {
	/*
	 * MCHAR and MLINE motion replace.
	 */
	if (oap->motion_type == MLINE)
	{
	    oap->start.col = 0;
	    curwin->w_cursor.col = 0;
	    oap->end.col = (colnr_T)STRLEN(ml_get(oap->end.lnum));
	    if (oap->end.col)
		--oap->end.col;
	}
	else if (!oap->inclusive)
	    dec(&(oap->end));

	while (LTOREQ_POS(curwin->w_cursor, oap->end))
	{
	    n = gchar_cursor();
	    if (n != NUL)
	    {
		if ((*mb_char2len)(c) > 1 || (*mb_char2len)(n) > 1)
		{
		    /* This is slow, but it handles replacing a single-byte
		     * with a multi-byte and the other way around. */
		    if (curwin->w_cursor.lnum == oap->end.lnum)
			oap->end.col += (*mb_char2len)(c) - (*mb_char2len)(n);
		    replace_character(c);
		}
		else
		{
		    if (n == TAB)
		    {
			int end_vcol = 0;

			if (curwin->w_cursor.lnum == oap->end.lnum)
			{
			    /* oap->end has to be recalculated when
			     * the tab breaks */
			    end_vcol = getviscol2(oap->end.col,
							     oap->end.coladd);
			}
			coladvance_force(getviscol());
			if (curwin->w_cursor.lnum == oap->end.lnum)
			    getvpos(&oap->end, end_vcol);
		    }
		    PBYTE(curwin->w_cursor, c);
		}
	    }
	    else if (virtual_op && curwin->w_cursor.lnum == oap->end.lnum)
	    {
		int virtcols = oap->end.coladd;

		if (curwin->w_cursor.lnum == oap->start.lnum
			&& oap->start.col == oap->end.col && oap->start.coladd)
		    virtcols -= oap->start.coladd;

		/* oap->end has been trimmed so it's effectively inclusive;
		 * as a result an extra +1 must be counted so we don't
		 * trample the NUL byte. */
		coladvance_force(getviscol2(oap->end.col, oap->end.coladd) + 1);
		curwin->w_cursor.col -= (virtcols + 1);
		for (; virtcols >= 0; virtcols--)
		{
                   if ((*mb_char2len)(c) > 1)
		       replace_character(c);
                   else
			PBYTE(curwin->w_cursor, c);
		   if (inc(&curwin->w_cursor) == -1)
		       break;
		}
	    }

	    /* Advance to next character, stop at the end of the file. */
	    if (inc_cursor() == -1)
		break;
	}
    }

    curwin->w_cursor = oap->start;
    check_cursor();
    changed_lines(oap->start.lnum, oap->start.col, oap->end.lnum + 1, 0L);

    /* Set "'[" and "']" marks. */
    curbuf->b_op_start = oap->start;
    curbuf->b_op_end = oap->end;

    return OK;
}

static int swapchars(int op_type, pos_T *pos, int length);

/*
 * Handle the (non-standard vi) tilde operator.  Also for "gu", "gU" and "g?".
 */
    static void
op_tilde(oparg_T *oap)
{
    pos_T		pos;
    struct block_def	bd;
    int			did_change = FALSE;

    if (u_save((linenr_T)(oap->start.lnum - 1),
				       (linenr_T)(oap->end.lnum + 1)) == FAIL)
	return;

    pos = oap->start;
    if (oap->block_mode)		    /* Visual block mode */
    {
	for (; pos.lnum <= oap->end.lnum; ++pos.lnum)
	{
	    int one_change;

	    block_prep(oap, &bd, pos.lnum, FALSE);
	    pos.col = bd.textcol;
	    one_change = swapchars(oap->op_type, &pos, bd.textlen);
	    did_change |= one_change;

#ifdef FEAT_NETBEANS_INTG
	    if (netbeans_active() && one_change)
	    {
		char_u *ptr = ml_get_buf(curbuf, pos.lnum, FALSE);

		netbeans_removed(curbuf, pos.lnum, bd.textcol,
							    (long)bd.textlen);
		netbeans_inserted(curbuf, pos.lnum, bd.textcol,
						&ptr[bd.textcol], bd.textlen);
	    }
#endif
	}
	if (did_change)
	    changed_lines(oap->start.lnum, 0, oap->end.lnum + 1, 0L);
    }
    else				    /* not block mode */
    {
	if (oap->motion_type == MLINE)
	{
	    oap->start.col = 0;
	    pos.col = 0;
	    oap->end.col = (colnr_T)STRLEN(ml_get(oap->end.lnum));
	    if (oap->end.col)
		--oap->end.col;
	}
	else if (!oap->inclusive)
	    dec(&(oap->end));

	if (pos.lnum == oap->end.lnum)
	    did_change = swapchars(oap->op_type, &pos,
						  oap->end.col - pos.col + 1);
	else
	    for (;;)
	    {
		did_change |= swapchars(oap->op_type, &pos,
				pos.lnum == oap->end.lnum ? oap->end.col + 1:
					   (int)STRLEN(ml_get_pos(&pos)));
		if (LTOREQ_POS(oap->end, pos) || inc(&pos) == -1)
		    break;
	    }
	if (did_change)
	{
	    changed_lines(oap->start.lnum, oap->start.col, oap->end.lnum + 1,
									  0L);
#ifdef FEAT_NETBEANS_INTG
	    if (netbeans_active() && did_change)
	    {
		char_u *ptr;
		int count;

		pos = oap->start;
		while (pos.lnum < oap->end.lnum)
		{
		    ptr = ml_get_buf(curbuf, pos.lnum, FALSE);
		    count = (int)STRLEN(ptr) - pos.col;
		    netbeans_removed(curbuf, pos.lnum, pos.col, (long)count);
		    netbeans_inserted(curbuf, pos.lnum, pos.col,
							&ptr[pos.col], count);
		    pos.col = 0;
		    pos.lnum++;
		}
		ptr = ml_get_buf(curbuf, pos.lnum, FALSE);
		count = oap->end.col - pos.col + 1;
		netbeans_removed(curbuf, pos.lnum, pos.col, (long)count);
		netbeans_inserted(curbuf, pos.lnum, pos.col,
							&ptr[pos.col], count);
	    }
#endif
	}
    }

    if (!did_change && oap->is_VIsual)
	/* No change: need to remove the Visual selection */
	redraw_curbuf_later(INVERTED);

    /*
     * Set '[ and '] marks.
     */
    curbuf->b_op_start = oap->start;
    curbuf->b_op_end = oap->end;

    if (oap->line_count > p_report)
	smsg(NGETTEXT("%ld line changed", "%ld lines changed",
					    oap->line_count), oap->line_count);
}

/*
 * Invoke swapchar() on "length" bytes at position "pos".
 * "pos" is advanced to just after the changed characters.
 * "length" is rounded up to include the whole last multi-byte character.
 * Also works correctly when the number of bytes changes.
 * Returns TRUE if some character was changed.
 */
    static int
swapchars(int op_type, pos_T *pos, int length)
{
    int todo;
    int	did_change = 0;

    for (todo = length; todo > 0; --todo)
    {
	if (has_mbyte)
	{
	    int len = (*mb_ptr2len)(ml_get_pos(pos));

	    /* we're counting bytes, not characters */
	    if (len > 0)
		todo -= len - 1;
	}
	did_change |= swapchar(op_type, pos);
	if (inc(pos) == -1)    /* at end of file */
	    break;
    }
    return did_change;
}

/*
 * If op_type == OP_UPPER: make uppercase,
 * if op_type == OP_LOWER: make lowercase,
 * if op_type == OP_ROT13: do rot13 encoding,
 * else swap case of character at 'pos'
 * returns TRUE when something actually changed.
 */
    int
swapchar(int op_type, pos_T *pos)
{
    int	    c;
    int	    nc;

    c = gchar_pos(pos);

    /* Only do rot13 encoding for ASCII characters. */
    if (c >= 0x80 && op_type == OP_ROT13)
	return FALSE;

    if (op_type == OP_UPPER && c == 0xdf
		      && (enc_latin1like || STRCMP(p_enc, "iso-8859-2") == 0))
    {
	pos_T   sp = curwin->w_cursor;

	/* Special handling of German sharp s: change to "SS". */
	curwin->w_cursor = *pos;
	del_char(FALSE);
	ins_char('S');
	ins_char('S');
	curwin->w_cursor = sp;
	inc(pos);
    }

    if (enc_dbcs != 0 && c >= 0x100)	/* No lower/uppercase letter */
	return FALSE;
    nc = c;
    if (MB_ISLOWER(c))
    {
	if (op_type == OP_ROT13)
	    nc = ROT13(c, 'a');
	else if (op_type != OP_LOWER)
	    nc = MB_TOUPPER(c);
    }
    else if (MB_ISUPPER(c))
    {
	if (op_type == OP_ROT13)
	    nc = ROT13(c, 'A');
	else if (op_type != OP_UPPER)
	    nc = MB_TOLOWER(c);
    }
    if (nc != c)
    {
	if (enc_utf8 && (c >= 0x80 || nc >= 0x80))
	{
	    pos_T   sp = curwin->w_cursor;

	    curwin->w_cursor = *pos;
	    /* don't use del_char(), it also removes composing chars */
	    del_bytes(utf_ptr2len(ml_get_cursor()), FALSE, FALSE);
	    ins_char(nc);
	    curwin->w_cursor = sp;
	}
	else
	    PBYTE(*pos, nc);
	return TRUE;
    }
    return FALSE;
}

/*
 * op_insert - Insert and append operators for Visual mode.
 */
    void
op_insert(oparg_T *oap, long count1)
{
    long		ins_len, pre_textlen = 0;
    char_u		*firstline, *ins_text;
    colnr_T		ind_pre = 0, ind_post;
    struct block_def	bd;
    int			i;
    pos_T		t1;

    /* edit() changes this - record it for OP_APPEND */
    bd.is_MAX = (curwin->w_curswant == MAXCOL);

    /* vis block is still marked. Get rid of it now. */
    curwin->w_cursor.lnum = oap->start.lnum;
    update_screen(INVERTED);

    if (oap->block_mode)
    {
	/* When 'virtualedit' is used, need to insert the extra spaces before
	 * doing block_prep().  When only "block" is used, virtual edit is
	 * already disabled, but still need it when calling
	 * coladvance_force(). */
	if (curwin->w_cursor.coladd > 0)
	{
	    int		old_ve_flags = ve_flags;

	    ve_flags = VE_ALL;
	    if (u_save_cursor() == FAIL)
		return;
	    coladvance_force(oap->op_type == OP_APPEND
					   ? oap->end_vcol + 1 : getviscol());
	    if (oap->op_type == OP_APPEND)
		--curwin->w_cursor.col;
	    ve_flags = old_ve_flags;
	}
	/* Get the info about the block before entering the text */
	block_prep(oap, &bd, oap->start.lnum, TRUE);
	/* Get indent information */
	ind_pre = (colnr_T)getwhitecols_curline();
	firstline = ml_get(oap->start.lnum) + bd.textcol;

	if (oap->op_type == OP_APPEND)
	    firstline += bd.textlen;
	pre_textlen = (long)STRLEN(firstline);
    }

    if (oap->op_type == OP_APPEND)
    {
	if (oap->block_mode && curwin->w_cursor.coladd == 0)
	{
	    /* Move the cursor to the character right of the block. */
	    curwin->w_set_curswant = TRUE;
	    while (*ml_get_cursor() != NUL
		    && (curwin->w_cursor.col < bd.textcol + bd.textlen))
		++curwin->w_cursor.col;
	    if (bd.is_short && !bd.is_MAX)
	    {
		/* First line was too short, make it longer and adjust the
		 * values in "bd". */
		if (u_save_cursor() == FAIL)
		    return;
		for (i = 0; i < bd.endspaces; ++i)
		    ins_char(' ');
		bd.textlen += bd.endspaces;
	    }
	}
	else
	{
	    curwin->w_cursor = oap->end;
	    check_cursor_col();

	    /* Works just like an 'i'nsert on the next character. */
	    if (!LINEEMPTY(curwin->w_cursor.lnum)
		    && oap->start_vcol != oap->end_vcol)
		inc_cursor();
	}
    }

    t1 = oap->start;
    (void)edit(NUL, FALSE, (linenr_T)count1);

    /* When a tab was inserted, and the characters in front of the tab
     * have been converted to a tab as well, the column of the cursor
     * might have actually been reduced, so need to adjust here. */
    if (t1.lnum == curbuf->b_op_start_orig.lnum
	    && LT_POS(curbuf->b_op_start_orig, t1))
	oap->start = curbuf->b_op_start_orig;

    /* If user has moved off this line, we don't know what to do, so do
     * nothing.
     * Also don't repeat the insert when Insert mode ended with CTRL-C. */
    if (curwin->w_cursor.lnum != oap->start.lnum || got_int)
	return;

    if (oap->block_mode)
    {
	struct block_def	bd2;
	int			did_indent = FALSE;
	size_t			len;
	int			add;

	/* If indent kicked in, the firstline might have changed
	 * but only do that, if the indent actually increased. */
	ind_post = (colnr_T)getwhitecols_curline();
	if (curbuf->b_op_start.col > ind_pre && ind_post > ind_pre)
	{
	    bd.textcol += ind_post - ind_pre;
	    bd.start_vcol += ind_post - ind_pre;
	    did_indent = TRUE;
	}

	/* The user may have moved the cursor before inserting something, try
	 * to adjust the block for that.  But only do it, if the difference
	 * does not come from indent kicking in. */
	if (oap->start.lnum == curbuf->b_op_start_orig.lnum
						  && !bd.is_MAX && !did_indent)
	{
	    if (oap->op_type == OP_INSERT
		    && oap->start.col + oap->start.coladd
			!= curbuf->b_op_start_orig.col
					      + curbuf->b_op_start_orig.coladd)
	    {
		int t = getviscol2(curbuf->b_op_start_orig.col,
					      curbuf->b_op_start_orig.coladd);
		oap->start.col = curbuf->b_op_start_orig.col;
		pre_textlen -= t - oap->start_vcol;
		oap->start_vcol = t;
	    }
	    else if (oap->op_type == OP_APPEND
		      && oap->end.col + oap->end.coladd
			>= curbuf->b_op_start_orig.col
					      + curbuf->b_op_start_orig.coladd)
	    {
		int t = getviscol2(curbuf->b_op_start_orig.col,
					      curbuf->b_op_start_orig.coladd);
		oap->start.col = curbuf->b_op_start_orig.col;
		/* reset pre_textlen to the value of OP_INSERT */
		pre_textlen += bd.textlen;
		pre_textlen -= t - oap->start_vcol;
		oap->start_vcol = t;
		oap->op_type = OP_INSERT;
	    }
	}

	/*
	 * Spaces and tabs in the indent may have changed to other spaces and
	 * tabs.  Get the starting column again and correct the length.
	 * Don't do this when "$" used, end-of-line will have changed.
	 */
	block_prep(oap, &bd2, oap->start.lnum, TRUE);
	if (!bd.is_MAX || bd2.textlen < bd.textlen)
	{
	    if (oap->op_type == OP_APPEND)
	    {
		pre_textlen += bd2.textlen - bd.textlen;
		if (bd2.endspaces)
		    --bd2.textlen;
	    }
	    bd.textcol = bd2.textcol;
	    bd.textlen = bd2.textlen;
	}

	/*
	 * Subsequent calls to ml_get() flush the firstline data - take a
	 * copy of the required string.
	 */
	firstline = ml_get(oap->start.lnum);
	len = STRLEN(firstline);
	add = bd.textcol;
	if (oap->op_type == OP_APPEND)
	    add += bd.textlen;
	if ((size_t)add > len)
	    firstline += len;  // short line, point to the NUL
	else
	    firstline += add;
	if (pre_textlen >= 0
		     && (ins_len = (long)STRLEN(firstline) - pre_textlen) > 0)
	{
	    ins_text = vim_strnsave(firstline, (int)ins_len);
	    if (ins_text != NULL)
	    {
		/* block handled here */
		if (u_save(oap->start.lnum,
					 (linenr_T)(oap->end.lnum + 1)) == OK)
		    block_insert(oap, ins_text, (oap->op_type == OP_INSERT),
									 &bd);

		curwin->w_cursor.col = oap->start.col;
		check_cursor();
		vim_free(ins_text);
	    }
	}
    }
}

/*
 * op_change - handle a change operation
 *
 * return TRUE if edit() returns because of a CTRL-O command
 */
    int
op_change(oparg_T *oap)
{
    colnr_T		l;
    int			retval;
    long		offset;
    linenr_T		linenr;
    long		ins_len;
    long		pre_textlen = 0;
    long		pre_indent = 0;
    char_u		*firstline;
    char_u		*ins_text, *newp, *oldp;
    struct block_def	bd;

    l = oap->start.col;
    if (oap->motion_type == MLINE)
    {
	l = 0;
#ifdef FEAT_SMARTINDENT
	if (!p_paste && curbuf->b_p_si
# ifdef FEAT_CINDENT
		&& !curbuf->b_p_cin
# endif
		)
	    can_si = TRUE;	/* It's like opening a new line, do si */
#endif
    }

    /* First delete the text in the region.  In an empty buffer only need to
     * save for undo */
    if (curbuf->b_ml.ml_flags & ML_EMPTY)
    {
	if (u_save_cursor() == FAIL)
	    return FALSE;
    }
    else if (op_delete(oap) == FAIL)
	return FALSE;

    if ((l > curwin->w_cursor.col) && !LINEEMPTY(curwin->w_cursor.lnum)
							 && !virtual_op)
	inc_cursor();

    /* check for still on same line (<CR> in inserted text meaningless) */
    /* skip blank lines too */
    if (oap->block_mode)
    {
	/* Add spaces before getting the current line length. */
	if (virtual_op && (curwin->w_cursor.coladd > 0
						    || gchar_cursor() == NUL))
	    coladvance_force(getviscol());
	firstline = ml_get(oap->start.lnum);
	pre_textlen = (long)STRLEN(firstline);
	pre_indent = (long)getwhitecols(firstline);
	bd.textcol = curwin->w_cursor.col;
    }

#if defined(FEAT_LISP) || defined(FEAT_CINDENT)
    if (oap->motion_type == MLINE)
	fix_indent();
#endif

    retval = edit(NUL, FALSE, (linenr_T)1);

    /*
     * In Visual block mode, handle copying the new text to all lines of the
     * block.
     * Don't repeat the insert when Insert mode ended with CTRL-C.
     */
    if (oap->block_mode && oap->start.lnum != oap->end.lnum && !got_int)
    {
	/* Auto-indenting may have changed the indent.  If the cursor was past
	 * the indent, exclude that indent change from the inserted text. */
	firstline = ml_get(oap->start.lnum);
	if (bd.textcol > (colnr_T)pre_indent)
	{
	    long new_indent = (long)getwhitecols(firstline);

	    pre_textlen += new_indent - pre_indent;
	    bd.textcol += new_indent - pre_indent;
	}

	ins_len = (long)STRLEN(firstline) - pre_textlen;
	if (ins_len > 0)
	{
	    /* Subsequent calls to ml_get() flush the firstline data - take a
	     * copy of the inserted text.  */
	    if ((ins_text = alloc(ins_len + 1)) != NULL)
	    {
		vim_strncpy(ins_text, firstline + bd.textcol, (size_t)ins_len);
		for (linenr = oap->start.lnum + 1; linenr <= oap->end.lnum;
								     linenr++)
		{
		    block_prep(oap, &bd, linenr, TRUE);
		    if (!bd.is_short || virtual_op)
		    {
			pos_T vpos;

			/* If the block starts in virtual space, count the
			 * initial coladd offset as part of "startspaces" */
			if (bd.is_short)
			{
			    vpos.lnum = linenr;
			    (void)getvpos(&vpos, oap->start_vcol);
			}
			else
			    vpos.coladd = 0;
			oldp = ml_get(linenr);
			newp = alloc(STRLEN(oldp) + vpos.coladd + ins_len + 1);
			if (newp == NULL)
			    continue;
			/* copy up to block start */
			mch_memmove(newp, oldp, (size_t)bd.textcol);
			offset = bd.textcol;
			vim_memset(newp + offset, ' ', (size_t)vpos.coladd);
			offset += vpos.coladd;
			mch_memmove(newp + offset, ins_text, (size_t)ins_len);
			offset += ins_len;
			oldp += bd.textcol;
			STRMOVE(newp + offset, oldp);
			ml_replace(linenr, newp, FALSE);
		    }
		}
		check_cursor();

		changed_lines(oap->start.lnum + 1, 0, oap->end.lnum + 1, 0L);
	    }
	    vim_free(ins_text);
	}
    }

    return retval;
}

/*
 * When the cursor is on the NUL past the end of the line and it should not be
 * there move it left.
 */
    void
adjust_cursor_eol(void)
{
    if (curwin->w_cursor.col > 0
	    && gchar_cursor() == NUL
	    && (ve_flags & VE_ONEMORE) == 0
	    && !(restart_edit || (State & INSERT)))
    {
	/* Put the cursor on the last character in the line. */
	dec_cursor();

	if (ve_flags == VE_ALL)
	{
	    colnr_T	    scol, ecol;

	    /* Coladd is set to the width of the last character. */
	    getvcol(curwin, &curwin->w_cursor, &scol, NULL, &ecol);
	    curwin->w_cursor.coladd = ecol - scol + 1;
	}
    }
}

/*
 * If "process" is TRUE and the line begins with a comment leader (possibly
 * after some white space), return a pointer to the text after it. Put a boolean
 * value indicating whether the line ends with an unclosed comment in
 * "is_comment".
 * line - line to be processed,
 * process - if FALSE, will only check whether the line ends with an unclosed
 *	     comment,
 * include_space - whether to also skip space following the comment leader,
 * is_comment - will indicate whether the current line ends with an unclosed
 *		comment.
 */
    char_u *
skip_comment(
    char_u   *line,
    int      process,
    int	     include_space,
    int      *is_comment)
{
    char_u *comment_flags = NULL;
    int    lead_len;
    int    leader_offset = get_last_leader_offset(line, &comment_flags);

    *is_comment = FALSE;
    if (leader_offset != -1)
    {
	/* Let's check whether the line ends with an unclosed comment.
	 * If the last comment leader has COM_END in flags, there's no comment.
	 */
	while (*comment_flags)
	{
	    if (*comment_flags == COM_END
		    || *comment_flags == ':')
		break;
	    ++comment_flags;
	}
	if (*comment_flags != COM_END)
	    *is_comment = TRUE;
    }

    if (process == FALSE)
	return line;

    lead_len = get_leader_len(line, &comment_flags, FALSE, include_space);

    if (lead_len == 0)
	return line;

    /* Find:
     * - COM_END,
     * - colon,
     * whichever comes first.
     */
    while (*comment_flags)
    {
	if (*comment_flags == COM_END
		|| *comment_flags == ':')
	    break;
	++comment_flags;
    }

    /* If we found a colon, it means that we are not processing a line
     * starting with a closing part of a three-part comment. That's good,
     * because we don't want to remove those as this would be annoying.
     */
    if (*comment_flags == ':' || *comment_flags == NUL)
	line += lead_len;

    return line;
}

/*
 * Join 'count' lines (minimal 2) at cursor position.
 * When "save_undo" is TRUE save lines for undo first.
 * Set "use_formatoptions" to FALSE when e.g. processing backspace and comment
 * leaders should not be removed.
 * When setmark is TRUE, sets the '[ and '] mark, else, the caller is expected
 * to set those marks.
 *
 * return FAIL for failure, OK otherwise
 */
    int
do_join(
    long    count,
    int	    insert_space,
    int	    save_undo,
    int	    use_formatoptions UNUSED,
    int	    setmark)
{
    char_u	*curr = NULL;
    char_u      *curr_start = NULL;
    char_u	*cend;
    char_u	*newp;
    char_u	*spaces;	/* number of spaces inserted before a line */
    int		endcurr1 = NUL;
    int		endcurr2 = NUL;
    int		currsize = 0;	/* size of the current line */
    int		sumsize = 0;	/* size of the long new line */
    linenr_T	t;
    colnr_T	col = 0;
    int		ret = OK;
    int		*comments = NULL;
    int		remove_comments = (use_formatoptions == TRUE)
				  && has_format_option(FO_REMOVE_COMS);
    int		prev_was_comment;
#ifdef FEAT_TEXT_PROP
    textprop_T	**prop_lines = NULL;
    int		*prop_lengths = NULL;
#endif

    if (save_undo && u_save((linenr_T)(curwin->w_cursor.lnum - 1),
			    (linenr_T)(curwin->w_cursor.lnum + count)) == FAIL)
	return FAIL;

    /* Allocate an array to store the number of spaces inserted before each
     * line.  We will use it to pre-compute the length of the new line and the
     * proper placement of each original line in the new one. */
    spaces = lalloc_clear(count, TRUE);
    if (spaces == NULL)
	return FAIL;
    if (remove_comments)
    {
	comments = lalloc_clear(count * sizeof(int), TRUE);
	if (comments == NULL)
	{
	    vim_free(spaces);
	    return FAIL;
	}
    }

    /*
     * Don't move anything yet, just compute the final line length
     * and setup the array of space strings lengths
     * This loops forward over the joined lines.
     */
    for (t = 0; t < count; ++t)
    {
	curr = curr_start = ml_get((linenr_T)(curwin->w_cursor.lnum + t));
	if (t == 0 && setmark)
	{
	    /* Set the '[ mark. */
	    curwin->w_buffer->b_op_start.lnum = curwin->w_cursor.lnum;
	    curwin->w_buffer->b_op_start.col  = (colnr_T)STRLEN(curr);
	}
	if (remove_comments)
	{
	    /* We don't want to remove the comment leader if the
	     * previous line is not a comment. */
	    if (t > 0 && prev_was_comment)
	    {

		char_u *new_curr = skip_comment(curr, TRUE, insert_space,
							   &prev_was_comment);
		comments[t] = (int)(new_curr - curr);
		curr = new_curr;
	    }
	    else
		curr = skip_comment(curr, FALSE, insert_space,
							   &prev_was_comment);
	}

	if (insert_space && t > 0)
	{
	    curr = skipwhite(curr);
	    if (*curr != ')' && currsize != 0 && endcurr1 != TAB
		    && (!has_format_option(FO_MBYTE_JOIN)
			|| (mb_ptr2char(curr) < 0x100 && endcurr1 < 0x100))
		    && (!has_format_option(FO_MBYTE_JOIN2)
			|| mb_ptr2char(curr) < 0x100 || endcurr1 < 0x100)
	       )
	    {
		/* don't add a space if the line is ending in a space */
		if (endcurr1 == ' ')
		    endcurr1 = endcurr2;
		else
		    ++spaces[t];
		/* extra space when 'joinspaces' set and line ends in '.' */
		if (       p_js
			&& (endcurr1 == '.'
			    || (vim_strchr(p_cpo, CPO_JOINSP) == NULL
				&& (endcurr1 == '?' || endcurr1 == '!'))))
		    ++spaces[t];
	    }
	}
	currsize = (int)STRLEN(curr);
	sumsize += currsize + spaces[t];
	endcurr1 = endcurr2 = NUL;
	if (insert_space && currsize > 0)
	{
	    if (has_mbyte)
	    {
		cend = curr + currsize;
		MB_PTR_BACK(curr, cend);
		endcurr1 = (*mb_ptr2char)(cend);
		if (cend > curr)
		{
		    MB_PTR_BACK(curr, cend);
		    endcurr2 = (*mb_ptr2char)(cend);
		}
	    }
	    else
	    {
		endcurr1 = *(curr + currsize - 1);
		if (currsize > 1)
		    endcurr2 = *(curr + currsize - 2);
	    }
	}
	line_breakcheck();
	if (got_int)
	{
	    ret = FAIL;
	    goto theend;
	}
    }

    /* store the column position before last line */
    col = sumsize - currsize - spaces[count - 1];

    /* allocate the space for the new line */
    newp = alloc(sumsize + 1);
    if (newp == NULL)
    {
	ret = FAIL;
	goto theend;
    }
    cend = newp + sumsize;
    *cend = 0;

#ifdef FEAT_TEXT_PROP
    // We need to move properties of the lines that are going to be deleted to
    // the new long one.
    if (curbuf->b_has_textprop && !text_prop_frozen)
    {
	// Allocate an array to copy the text properties of joined lines into.
	// And another array to store the number of properties in each line.
	prop_lines = ALLOC_CLEAR_MULT(textprop_T *, count - 1);
	prop_lengths = ALLOC_CLEAR_MULT(int, count - 1);
	if (prop_lengths == NULL)
	    VIM_CLEAR(prop_lines);
    }
#endif

    /*
     * Move affected lines to the new long one.
     * This loops backwards over the joined lines, including the original line.
     *
     * Move marks from each deleted line to the joined line, adjusting the
     * column.  This is not Vi compatible, but Vi deletes the marks, thus that
     * should not really be a problem.
     */
    for (t = count - 1; ; --t)
    {
	int spaces_removed;

	cend -= currsize;
	mch_memmove(cend, curr, (size_t)currsize);
	if (spaces[t] > 0)
	{
	    cend -= spaces[t];
	    vim_memset(cend, ' ', (size_t)(spaces[t]));
	}

	// If deleting more spaces than adding, the cursor moves no more than
	// what is added if it is inside these spaces.
	spaces_removed = (curr - curr_start) - spaces[t];

	mark_col_adjust(curwin->w_cursor.lnum + t, (colnr_T)0, (linenr_T)-t,
			 (long)(cend - newp - spaces_removed), spaces_removed);
	if (t == 0)
	    break;
#ifdef FEAT_TEXT_PROP
	if (prop_lines != NULL)
	    adjust_props_for_join(curwin->w_cursor.lnum + t,
				      prop_lines + t - 1, prop_lengths + t - 1,
			 (long)(cend - newp - spaces_removed), spaces_removed);
#endif

	curr = curr_start = ml_get((linenr_T)(curwin->w_cursor.lnum + t - 1));
	if (remove_comments)
	    curr += comments[t - 1];
	if (insert_space && t > 1)
	    curr = skipwhite(curr);
	currsize = (int)STRLEN(curr);
    }

#ifdef FEAT_TEXT_PROP
    if (prop_lines != NULL)
	join_prop_lines(curwin->w_cursor.lnum, newp,
					      prop_lines, prop_lengths, count);
    else
#endif
	ml_replace(curwin->w_cursor.lnum, newp, FALSE);

    if (setmark)
    {
	/* Set the '] mark. */
	curwin->w_buffer->b_op_end.lnum = curwin->w_cursor.lnum;
	curwin->w_buffer->b_op_end.col  = (colnr_T)sumsize;
    }

    /* Only report the change in the first line here, del_lines() will report
     * the deleted line. */
    changed_lines(curwin->w_cursor.lnum, currsize,
					       curwin->w_cursor.lnum + 1, 0L);
    /*
     * Delete following lines. To do this we move the cursor there
     * briefly, and then move it back. After del_lines() the cursor may
     * have moved up (last line deleted), so the current lnum is kept in t.
     */
    t = curwin->w_cursor.lnum;
    ++curwin->w_cursor.lnum;
    del_lines(count - 1, FALSE);
    curwin->w_cursor.lnum = t;

    /*
     * Set the cursor column:
     * Vi compatible: use the column of the first join
     * vim:	      use the column of the last join
     */
    curwin->w_cursor.col =
		    (vim_strchr(p_cpo, CPO_JOINCOL) != NULL ? currsize : col);
    check_cursor_col();

    curwin->w_cursor.coladd = 0;
    curwin->w_set_curswant = TRUE;

theend:
    vim_free(spaces);
    if (remove_comments)
	vim_free(comments);
    return ret;
}

/*
 * Return TRUE if the two comment leaders given are the same.  "lnum" is
 * the first line.  White-space is ignored.  Note that the whole of
 * 'leader1' must match 'leader2_len' characters from 'leader2' -- webb
 */
    static int
same_leader(
    linenr_T lnum,
    int	    leader1_len,
    char_u  *leader1_flags,
    int	    leader2_len,
    char_u  *leader2_flags)
{
    int	    idx1 = 0, idx2 = 0;
    char_u  *p;
    char_u  *line1;
    char_u  *line2;

    if (leader1_len == 0)
	return (leader2_len == 0);

    /*
     * If first leader has 'f' flag, the lines can be joined only if the
     * second line does not have a leader.
     * If first leader has 'e' flag, the lines can never be joined.
     * If fist leader has 's' flag, the lines can only be joined if there is
     * some text after it and the second line has the 'm' flag.
     */
    if (leader1_flags != NULL)
    {
	for (p = leader1_flags; *p && *p != ':'; ++p)
	{
	    if (*p == COM_FIRST)
		return (leader2_len == 0);
	    if (*p == COM_END)
		return FALSE;
	    if (*p == COM_START)
	    {
		if (*(ml_get(lnum) + leader1_len) == NUL)
		    return FALSE;
		if (leader2_flags == NULL || leader2_len == 0)
		    return FALSE;
		for (p = leader2_flags; *p && *p != ':'; ++p)
		    if (*p == COM_MIDDLE)
			return TRUE;
		return FALSE;
	    }
	}
    }

    /*
     * Get current line and next line, compare the leaders.
     * The first line has to be saved, only one line can be locked at a time.
     */
    line1 = vim_strsave(ml_get(lnum));
    if (line1 != NULL)
    {
	for (idx1 = 0; VIM_ISWHITE(line1[idx1]); ++idx1)
	    ;
	line2 = ml_get(lnum + 1);
	for (idx2 = 0; idx2 < leader2_len; ++idx2)
	{
	    if (!VIM_ISWHITE(line2[idx2]))
	    {
		if (line1[idx1++] != line2[idx2])
		    break;
	    }
	    else
		while (VIM_ISWHITE(line1[idx1]))
		    ++idx1;
	}
	vim_free(line1);
    }
    return (idx2 == leader2_len && idx1 == leader1_len);
}

/*
 * Implementation of the format operator 'gq'.
 */
    static void
op_format(
    oparg_T	*oap,
    int		keep_cursor)		/* keep cursor on same text char */
{
    long	old_line_count = curbuf->b_ml.ml_line_count;

    /* Place the cursor where the "gq" or "gw" command was given, so that "u"
     * can put it back there. */
    curwin->w_cursor = oap->cursor_start;

    if (u_save((linenr_T)(oap->start.lnum - 1),
				       (linenr_T)(oap->end.lnum + 1)) == FAIL)
	return;
    curwin->w_cursor = oap->start;

    if (oap->is_VIsual)
	/* When there is no change: need to remove the Visual selection */
	redraw_curbuf_later(INVERTED);

    /* Set '[ mark at the start of the formatted area */
    curbuf->b_op_start = oap->start;

    /* For "gw" remember the cursor position and put it back below (adjusted
     * for joined and split lines). */
    if (keep_cursor)
	saved_cursor = oap->cursor_start;

    format_lines(oap->line_count, keep_cursor);

    /*
     * Leave the cursor at the first non-blank of the last formatted line.
     * If the cursor was moved one line back (e.g. with "Q}") go to the next
     * line, so "." will do the next lines.
     */
    if (oap->end_adjusted && curwin->w_cursor.lnum < curbuf->b_ml.ml_line_count)
	++curwin->w_cursor.lnum;
    beginline(BL_WHITE | BL_FIX);
    old_line_count = curbuf->b_ml.ml_line_count - old_line_count;
    msgmore(old_line_count);

    /* put '] mark on the end of the formatted area */
    curbuf->b_op_end = curwin->w_cursor;

    if (keep_cursor)
    {
	curwin->w_cursor = saved_cursor;
	saved_cursor.lnum = 0;
    }

    if (oap->is_VIsual)
    {
	win_T	*wp;

	FOR_ALL_WINDOWS(wp)
	{
	    if (wp->w_old_cursor_lnum != 0)
	    {
		/* When lines have been inserted or deleted, adjust the end of
		 * the Visual area to be redrawn. */
		if (wp->w_old_cursor_lnum > wp->w_old_visual_lnum)
		    wp->w_old_cursor_lnum += old_line_count;
		else
		    wp->w_old_visual_lnum += old_line_count;
	    }
	}
    }
}

#if defined(FEAT_EVAL) || defined(PROTO)
/*
 * Implementation of the format operator 'gq' for when using 'formatexpr'.
 */
    static void
op_formatexpr(oparg_T *oap)
{
    if (oap->is_VIsual)
	/* When there is no change: need to remove the Visual selection */
	redraw_curbuf_later(INVERTED);

    if (fex_format(oap->start.lnum, oap->line_count, NUL) != 0)
	/* As documented: when 'formatexpr' returns non-zero fall back to
	 * internal formatting. */
	op_format(oap, FALSE);
}

    int
fex_format(
    linenr_T	lnum,
    long	count,
    int		c)	/* character to be inserted */
{
    int		use_sandbox = was_set_insecurely((char_u *)"formatexpr",
								   OPT_LOCAL);
    int		r;
    char_u	*fex;

    /*
     * Set v:lnum to the first line number and v:count to the number of lines.
     * Set v:char to the character to be inserted (can be NUL).
     */
    set_vim_var_nr(VV_LNUM, lnum);
    set_vim_var_nr(VV_COUNT, count);
    set_vim_var_char(c);

    /* Make a copy, the option could be changed while calling it. */
    fex = vim_strsave(curbuf->b_p_fex);
    if (fex == NULL)
	return 0;

    /*
     * Evaluate the function.
     */
    if (use_sandbox)
	++sandbox;
    r = (int)eval_to_number(fex);
    if (use_sandbox)
	--sandbox;

    set_vim_var_string(VV_CHAR, NULL, -1);
    vim_free(fex);

    return r;
}
#endif

/*
 * Format "line_count" lines, starting at the cursor position.
 * When "line_count" is negative, format until the end of the paragraph.
 * Lines after the cursor line are saved for undo, caller must have saved the
 * first line.
 */
    void
format_lines(
    linenr_T	line_count,
    int		avoid_fex)		/* don't use 'formatexpr' */
{
    int		max_len;
    int		is_not_par;		/* current line not part of parag. */
    int		next_is_not_par;	/* next line not part of paragraph */
    int		is_end_par;		/* at end of paragraph */
    int		prev_is_end_par = FALSE;/* prev. line not part of parag. */
    int		next_is_start_par = FALSE;
    int		leader_len = 0;		/* leader len of current line */
    int		next_leader_len;	/* leader len of next line */
    char_u	*leader_flags = NULL;	/* flags for leader of current line */
    char_u	*next_leader_flags;	/* flags for leader of next line */
    int		do_comments;		/* format comments */
    int		do_comments_list = 0;	/* format comments with 'n' or '2' */
    int		advance = TRUE;
    int		second_indent = -1;	/* indent for second line (comment
					 * aware) */
    int		do_second_indent;
    int		do_number_indent;
    int		do_trail_white;
    int		first_par_line = TRUE;
    int		smd_save;
    long	count;
    int		need_set_indent = TRUE;	/* set indent of next paragraph */
    int		force_format = FALSE;
    int		old_State = State;

    /* length of a line to force formatting: 3 * 'tw' */
    max_len = comp_textwidth(TRUE) * 3;

    /* check for 'q', '2' and '1' in 'formatoptions' */
    do_comments = has_format_option(FO_Q_COMS);
    do_second_indent = has_format_option(FO_Q_SECOND);
    do_number_indent = has_format_option(FO_Q_NUMBER);
    do_trail_white = has_format_option(FO_WHITE_PAR);

    /*
     * Get info about the previous and current line.
     */
    if (curwin->w_cursor.lnum > 1)
	is_not_par = fmt_check_par(curwin->w_cursor.lnum - 1
				, &leader_len, &leader_flags, do_comments);
    else
	is_not_par = TRUE;
    next_is_not_par = fmt_check_par(curwin->w_cursor.lnum
			  , &next_leader_len, &next_leader_flags, do_comments);
    is_end_par = (is_not_par || next_is_not_par);
    if (!is_end_par && do_trail_white)
	is_end_par = !ends_in_white(curwin->w_cursor.lnum - 1);

    curwin->w_cursor.lnum--;
    for (count = line_count; count != 0 && !got_int; --count)
    {
	/*
	 * Advance to next paragraph.
	 */
	if (advance)
	{
	    curwin->w_cursor.lnum++;
	    prev_is_end_par = is_end_par;
	    is_not_par = next_is_not_par;
	    leader_len = next_leader_len;
	    leader_flags = next_leader_flags;
	}

	/*
	 * The last line to be formatted.
	 */
	if (count == 1 || curwin->w_cursor.lnum == curbuf->b_ml.ml_line_count)
	{
	    next_is_not_par = TRUE;
	    next_leader_len = 0;
	    next_leader_flags = NULL;
	}
	else
	{
	    next_is_not_par = fmt_check_par(curwin->w_cursor.lnum + 1
			  , &next_leader_len, &next_leader_flags, do_comments);
	    if (do_number_indent)
		next_is_start_par =
			   (get_number_indent(curwin->w_cursor.lnum + 1) > 0);
	}
	advance = TRUE;
	is_end_par = (is_not_par || next_is_not_par || next_is_start_par);
	if (!is_end_par && do_trail_white)
	    is_end_par = !ends_in_white(curwin->w_cursor.lnum);

	/*
	 * Skip lines that are not in a paragraph.
	 */
	if (is_not_par)
	{
	    if (line_count < 0)
		break;
	}
	else
	{
	    /*
	     * For the first line of a paragraph, check indent of second line.
	     * Don't do this for comments and empty lines.
	     */
	    if (first_par_line
		    && (do_second_indent || do_number_indent)
		    && prev_is_end_par
		    && curwin->w_cursor.lnum < curbuf->b_ml.ml_line_count)
	    {
		if (do_second_indent && !LINEEMPTY(curwin->w_cursor.lnum + 1))
		{
		    if (leader_len == 0 && next_leader_len == 0)
		    {
			/* no comment found */
			second_indent =
				   get_indent_lnum(curwin->w_cursor.lnum + 1);
		    }
		    else
		    {
			second_indent = next_leader_len;
			do_comments_list = 1;
		    }
		}
		else if (do_number_indent)
		{
		    if (leader_len == 0 && next_leader_len == 0)
		    {
			/* no comment found */
			second_indent =
				     get_number_indent(curwin->w_cursor.lnum);
		    }
		    else
		    {
			/* get_number_indent() is now "comment aware"... */
			second_indent =
				     get_number_indent(curwin->w_cursor.lnum);
			do_comments_list = 1;
		    }
		}
	    }

	    /*
	     * When the comment leader changes, it's the end of the paragraph.
	     */
	    if (curwin->w_cursor.lnum >= curbuf->b_ml.ml_line_count
		    || !same_leader(curwin->w_cursor.lnum,
					leader_len, leader_flags,
					   next_leader_len, next_leader_flags))
		is_end_par = TRUE;

	    /*
	     * If we have got to the end of a paragraph, or the line is
	     * getting long, format it.
	     */
	    if (is_end_par || force_format)
	    {
		if (need_set_indent)
		    /* replace indent in first line with minimal number of
		     * tabs and spaces, according to current options */
		    (void)set_indent(get_indent(), SIN_CHANGED);

		/* put cursor on last non-space */
		State = NORMAL;	/* don't go past end-of-line */
		coladvance((colnr_T)MAXCOL);
		while (curwin->w_cursor.col && vim_isspace(gchar_cursor()))
		    dec_cursor();

		/* do the formatting, without 'showmode' */
		State = INSERT;	/* for open_line() */
		smd_save = p_smd;
		p_smd = FALSE;
		insertchar(NUL, INSCHAR_FORMAT
			+ (do_comments ? INSCHAR_DO_COM : 0)
			+ (do_comments && do_comments_list
						       ? INSCHAR_COM_LIST : 0)
			+ (avoid_fex ? INSCHAR_NO_FEX : 0), second_indent);
		State = old_State;
		p_smd = smd_save;
		second_indent = -1;
		/* at end of par.: need to set indent of next par. */
		need_set_indent = is_end_par;
		if (is_end_par)
		{
		    /* When called with a negative line count, break at the
		     * end of the paragraph. */
		    if (line_count < 0)
			break;
		    first_par_line = TRUE;
		}
		force_format = FALSE;
	    }

	    /*
	     * When still in same paragraph, join the lines together.  But
	     * first delete the leader from the second line.
	     */
	    if (!is_end_par)
	    {
		advance = FALSE;
		curwin->w_cursor.lnum++;
		curwin->w_cursor.col = 0;
		if (line_count < 0 && u_save_cursor() == FAIL)
		    break;
		if (next_leader_len > 0)
		{
		    (void)del_bytes((long)next_leader_len, FALSE, FALSE);
		    mark_col_adjust(curwin->w_cursor.lnum, (colnr_T)0, 0L,
						    (long)-next_leader_len, 0);
		}
		else if (second_indent > 0)  // the "leader" for FO_Q_SECOND
		{
		    int indent = getwhitecols_curline();

		    if (indent > 0)
		    {
			(void)del_bytes(indent, FALSE, FALSE);
			mark_col_adjust(curwin->w_cursor.lnum,
					       (colnr_T)0, 0L, (long)-indent, 0);
		    }
		}
		curwin->w_cursor.lnum--;
		if (do_join(2, TRUE, FALSE, FALSE, FALSE) == FAIL)
		{
		    beep_flush();
		    break;
		}
		first_par_line = FALSE;
		/* If the line is getting long, format it next time */
		if (STRLEN(ml_get_curline()) > (size_t)max_len)
		    force_format = TRUE;
		else
		    force_format = FALSE;
	    }
	}
	line_breakcheck();
    }
}

/*
 * Return TRUE if line "lnum" ends in a white character.
 */
    static int
ends_in_white(linenr_T lnum)
{
    char_u	*s = ml_get(lnum);
    size_t	l;

    if (*s == NUL)
	return FALSE;
    /* Don't use STRLEN() inside VIM_ISWHITE(), SAS/C complains: "macro
     * invocation may call function multiple times". */
    l = STRLEN(s) - 1;
    return VIM_ISWHITE(s[l]);
}

/*
 * Blank lines, and lines containing only the comment leader, are left
 * untouched by the formatting.  The function returns TRUE in this
 * case.  It also returns TRUE when a line starts with the end of a comment
 * ('e' in comment flags), so that this line is skipped, and not joined to the
 * previous line.  A new paragraph starts after a blank line, or when the
 * comment leader changes -- webb.
 */
    static int
fmt_check_par(
    linenr_T	lnum,
    int		*leader_len,
    char_u	**leader_flags,
    int		do_comments)
{
    char_u	*flags = NULL;	    /* init for GCC */
    char_u	*ptr;

    ptr = ml_get(lnum);
    if (do_comments)
	*leader_len = get_leader_len(ptr, leader_flags, FALSE, TRUE);
    else
	*leader_len = 0;

    if (*leader_len > 0)
    {
	/*
	 * Search for 'e' flag in comment leader flags.
	 */
	flags = *leader_flags;
	while (*flags && *flags != ':' && *flags != COM_END)
	    ++flags;
    }

    return (*skipwhite(ptr + *leader_len) == NUL
	    || (*leader_len > 0 && *flags == COM_END)
	    || startPS(lnum, NUL, FALSE));
}

/*
 * Return TRUE when a paragraph starts in line "lnum".  Return FALSE when the
 * previous line is in the same paragraph.  Used for auto-formatting.
 */
    int
paragraph_start(linenr_T lnum)
{
    char_u	*p;
    int		leader_len = 0;		/* leader len of current line */
    char_u	*leader_flags = NULL;	/* flags for leader of current line */
    int		next_leader_len;	/* leader len of next line */
    char_u	*next_leader_flags;	/* flags for leader of next line */
    int		do_comments;		/* format comments */

    if (lnum <= 1)
	return TRUE;		/* start of the file */

    p = ml_get(lnum - 1);
    if (*p == NUL)
	return TRUE;		/* after empty line */

    do_comments = has_format_option(FO_Q_COMS);
    if (fmt_check_par(lnum - 1, &leader_len, &leader_flags, do_comments))
	return TRUE;		/* after non-paragraph line */

    if (fmt_check_par(lnum, &next_leader_len, &next_leader_flags, do_comments))
	return TRUE;		/* "lnum" is not a paragraph line */

    if (has_format_option(FO_WHITE_PAR) && !ends_in_white(lnum - 1))
	return TRUE;		/* missing trailing space in previous line. */

    if (has_format_option(FO_Q_NUMBER) && (get_number_indent(lnum) > 0))
	return TRUE;		/* numbered item starts in "lnum". */

    if (!same_leader(lnum - 1, leader_len, leader_flags,
					  next_leader_len, next_leader_flags))
	return TRUE;		/* change of comment leader. */

    return FALSE;
}

/*
 * prepare a few things for block mode yank/delete/tilde
 *
 * for delete:
 * - textlen includes the first/last char to be (partly) deleted
 * - start/endspaces is the number of columns that are taken by the
 *   first/last deleted char minus the number of columns that have to be
 *   deleted.
 * for yank and tilde:
 * - textlen includes the first/last char to be wholly yanked
 * - start/endspaces is the number of columns of the first/last yanked char
 *   that are to be yanked.
 */
    void
block_prep(
    oparg_T		*oap,
    struct block_def	*bdp,
    linenr_T		lnum,
    int			is_del)
{
    int		incr = 0;
    char_u	*pend;
    char_u	*pstart;
    char_u	*line;
    char_u	*prev_pstart;
    char_u	*prev_pend;

    bdp->startspaces = 0;
    bdp->endspaces = 0;
    bdp->textlen = 0;
    bdp->start_vcol = 0;
    bdp->end_vcol = 0;
    bdp->is_short = FALSE;
    bdp->is_oneChar = FALSE;
    bdp->pre_whitesp = 0;
    bdp->pre_whitesp_c = 0;
    bdp->end_char_vcols = 0;
    bdp->start_char_vcols = 0;

    line = ml_get(lnum);
    pstart = line;
    prev_pstart = line;
    while (bdp->start_vcol < oap->start_vcol && *pstart)
    {
	/* Count a tab for what it's worth (if list mode not on) */
	incr = lbr_chartabsize(line, pstart, (colnr_T)bdp->start_vcol);
	bdp->start_vcol += incr;
	if (VIM_ISWHITE(*pstart))
	{
	    bdp->pre_whitesp += incr;
	    bdp->pre_whitesp_c++;
	}
	else
	{
	    bdp->pre_whitesp = 0;
	    bdp->pre_whitesp_c = 0;
	}
	prev_pstart = pstart;
	MB_PTR_ADV(pstart);
    }
    bdp->start_char_vcols = incr;
    if (bdp->start_vcol < oap->start_vcol)	/* line too short */
    {
	bdp->end_vcol = bdp->start_vcol;
	bdp->is_short = TRUE;
	if (!is_del || oap->op_type == OP_APPEND)
	    bdp->endspaces = oap->end_vcol - oap->start_vcol + 1;
    }
    else
    {
	/* notice: this converts partly selected Multibyte characters to
	 * spaces, too. */
	bdp->startspaces = bdp->start_vcol - oap->start_vcol;
	if (is_del && bdp->startspaces)
	    bdp->startspaces = bdp->start_char_vcols - bdp->startspaces;
	pend = pstart;
	bdp->end_vcol = bdp->start_vcol;
	if (bdp->end_vcol > oap->end_vcol)	/* it's all in one character */
	{
	    bdp->is_oneChar = TRUE;
	    if (oap->op_type == OP_INSERT)
		bdp->endspaces = bdp->start_char_vcols - bdp->startspaces;
	    else if (oap->op_type == OP_APPEND)
	    {
		bdp->startspaces += oap->end_vcol - oap->start_vcol + 1;
		bdp->endspaces = bdp->start_char_vcols - bdp->startspaces;
	    }
	    else
	    {
		bdp->startspaces = oap->end_vcol - oap->start_vcol + 1;
		if (is_del && oap->op_type != OP_LSHIFT)
		{
		    /* just putting the sum of those two into
		     * bdp->startspaces doesn't work for Visual replace,
		     * so we have to split the tab in two */
		    bdp->startspaces = bdp->start_char_vcols
					- (bdp->start_vcol - oap->start_vcol);
		    bdp->endspaces = bdp->end_vcol - oap->end_vcol - 1;
		}
	    }
	}
	else
	{
	    prev_pend = pend;
	    while (bdp->end_vcol <= oap->end_vcol && *pend != NUL)
	    {
		/* Count a tab for what it's worth (if list mode not on) */
		prev_pend = pend;
		incr = lbr_chartabsize_adv(line, &pend, (colnr_T)bdp->end_vcol);
		bdp->end_vcol += incr;
	    }
	    if (bdp->end_vcol <= oap->end_vcol
		    && (!is_del
			|| oap->op_type == OP_APPEND
			|| oap->op_type == OP_REPLACE)) /* line too short */
	    {
		bdp->is_short = TRUE;
		/* Alternative: include spaces to fill up the block.
		 * Disadvantage: can lead to trailing spaces when the line is
		 * short where the text is put */
		/* if (!is_del || oap->op_type == OP_APPEND) */
		if (oap->op_type == OP_APPEND || virtual_op)
		    bdp->endspaces = oap->end_vcol - bdp->end_vcol
							     + oap->inclusive;
		else
		    bdp->endspaces = 0; /* replace doesn't add characters */
	    }
	    else if (bdp->end_vcol > oap->end_vcol)
	    {
		bdp->endspaces = bdp->end_vcol - oap->end_vcol - 1;
		if (!is_del && bdp->endspaces)
		{
		    bdp->endspaces = incr - bdp->endspaces;
		    if (pend != pstart)
			pend = prev_pend;
		}
	    }
	}
	bdp->end_char_vcols = incr;
	if (is_del && bdp->startspaces)
	    pstart = prev_pstart;
	bdp->textlen = (int)(pend - pstart);
    }
    bdp->textcol = (colnr_T) (pstart - line);
    bdp->textstart = pstart;
}

/*
 * Handle the add/subtract operator.
 */
    void
op_addsub(
    oparg_T	*oap,
    linenr_T	Prenum1,	    /* Amount of add/subtract */
    int		g_cmd)		    /* was g<c-a>/g<c-x> */
{
    pos_T		pos;
    struct block_def	bd;
    int			change_cnt = 0;
    linenr_T		amount = Prenum1;

   // do_addsub() might trigger re-evaluation of 'foldexpr' halfway, when the
   // buffer is not completely updated yet. Postpone updating folds until before
   // the call to changed_lines().
#ifdef FEAT_FOLDING
   disable_fold_update++;
#endif

    if (!VIsual_active)
    {
	pos = curwin->w_cursor;
	if (u_save_cursor() == FAIL)
	{
#ifdef FEAT_FOLDING
	    disable_fold_update--;
#endif
	    return;
	}
	change_cnt = do_addsub(oap->op_type, &pos, 0, amount);
#ifdef FEAT_FOLDING
	disable_fold_update--;
#endif
	if (change_cnt)
	    changed_lines(pos.lnum, 0, pos.lnum + 1, 0L);
    }
    else
    {
	int	one_change;
	int	length;
	pos_T	startpos;

	if (u_save((linenr_T)(oap->start.lnum - 1),
					(linenr_T)(oap->end.lnum + 1)) == FAIL)
	{
#ifdef FEAT_FOLDING
	    disable_fold_update--;
#endif
	    return;
	}

	pos = oap->start;
	for (; pos.lnum <= oap->end.lnum; ++pos.lnum)
	{
	    if (oap->block_mode)		    /* Visual block mode */
	    {
		block_prep(oap, &bd, pos.lnum, FALSE);
		pos.col = bd.textcol;
		length = bd.textlen;
	    }
	    else if (oap->motion_type == MLINE)
	    {
		curwin->w_cursor.col = 0;
		pos.col = 0;
		length = (colnr_T)STRLEN(ml_get(pos.lnum));
	    }
	    else /* oap->motion_type == MCHAR */
	    {
		if (pos.lnum == oap->start.lnum && !oap->inclusive)
		    dec(&(oap->end));
		length = (colnr_T)STRLEN(ml_get(pos.lnum));
		pos.col = 0;
		if (pos.lnum == oap->start.lnum)
		{
		    pos.col += oap->start.col;
		    length -= oap->start.col;
		}
		if (pos.lnum == oap->end.lnum)
		{
		    length = (int)STRLEN(ml_get(oap->end.lnum));
		    if (oap->end.col >= length)
			oap->end.col = length - 1;
		    length = oap->end.col - pos.col + 1;
		}
	    }
	    one_change = do_addsub(oap->op_type, &pos, length, amount);
	    if (one_change)
	    {
		/* Remember the start position of the first change. */
		if (change_cnt == 0)
		    startpos = curbuf->b_op_start;
		++change_cnt;
	    }

#ifdef FEAT_NETBEANS_INTG
	    if (netbeans_active() && one_change)
	    {
		char_u *ptr = ml_get_buf(curbuf, pos.lnum, FALSE);

		netbeans_removed(curbuf, pos.lnum, pos.col, (long)length);
		netbeans_inserted(curbuf, pos.lnum, pos.col,
						&ptr[pos.col], length);
	    }
#endif
	    if (g_cmd && one_change)
		amount += Prenum1;
	}

#ifdef FEAT_FOLDING
	disable_fold_update--;
#endif
	if (change_cnt)
	    changed_lines(oap->start.lnum, 0, oap->end.lnum + 1, 0L);

	if (!change_cnt && oap->is_VIsual)
	    /* No change: need to remove the Visual selection */
	    redraw_curbuf_later(INVERTED);

	/* Set '[ mark if something changed. Keep the last end
	 * position from do_addsub(). */
	if (change_cnt > 0)
	    curbuf->b_op_start = startpos;

	if (change_cnt > p_report)
	    smsg(NGETTEXT("%ld line changed", "%ld lines changed",
						      change_cnt), change_cnt);
    }
}

/*
 * Add or subtract 'Prenum1' from a number in a line
 * op_type is OP_NR_ADD or OP_NR_SUB
 *
 * Returns TRUE if some character was changed.
 */
    static int
do_addsub(
    int		op_type,
    pos_T	*pos,
    int		length,
    linenr_T	Prenum1)
{
    int		col;
    char_u	*buf1;
    char_u	buf2[NUMBUFLEN];
    int		pre;		/* 'X'/'x': hex; '0': octal; 'B'/'b': bin */
    static int	hexupper = FALSE;	/* 0xABC */
    uvarnumber_T	n;
    uvarnumber_T	oldn;
    char_u	*ptr;
    int		c;
    int		todel;
    int		dohex;
    int		dooct;
    int		dobin;
    int		doalp;
    int		firstdigit;
    int		subtract;
    int		negative = FALSE;
    int		was_positive = TRUE;
    int		visual = VIsual_active;
    int		did_change = FALSE;
    pos_T	save_cursor = curwin->w_cursor;
    int		maxlen = 0;
    pos_T	startpos;
    pos_T	endpos;

    dohex = (vim_strchr(curbuf->b_p_nf, 'x') != NULL);	// "heX"
    dooct = (vim_strchr(curbuf->b_p_nf, 'o') != NULL);	// "Octal"
    dobin = (vim_strchr(curbuf->b_p_nf, 'b') != NULL);	// "Bin"
    doalp = (vim_strchr(curbuf->b_p_nf, 'p') != NULL);	// "alPha"

    curwin->w_cursor = *pos;
    ptr = ml_get(pos->lnum);
    col = pos->col;

    if (*ptr == NUL)
	goto theend;

    /*
     * First check if we are on a hexadecimal number, after the "0x".
     */
    if (!VIsual_active)
    {
	if (dobin)
	    while (col > 0 && vim_isbdigit(ptr[col]))
	    {
		--col;
		if (has_mbyte)
		    col -= (*mb_head_off)(ptr, ptr + col);
	    }

	if (dohex)
	    while (col > 0 && vim_isxdigit(ptr[col]))
	    {
		--col;
		if (has_mbyte)
		    col -= (*mb_head_off)(ptr, ptr + col);
	    }

	if (       dobin
		&& dohex
		&& ! ((col > 0
		    && (ptr[col] == 'X'
			|| ptr[col] == 'x')
		    && ptr[col - 1] == '0'
		    && (!has_mbyte ||
			!(*mb_head_off)(ptr, ptr + col - 1))
		    && vim_isxdigit(ptr[col + 1]))))
	{

	    /* In case of binary/hexadecimal pattern overlap match, rescan */

	    col = pos->col;

	    while (col > 0 && vim_isdigit(ptr[col]))
	    {
		col--;
		if (has_mbyte)
		    col -= (*mb_head_off)(ptr, ptr + col);
	    }
	}

	if ((       dohex
		&& col > 0
		&& (ptr[col] == 'X'
		    || ptr[col] == 'x')
		&& ptr[col - 1] == '0'
		&& (!has_mbyte ||
		    !(*mb_head_off)(ptr, ptr + col - 1))
		&& vim_isxdigit(ptr[col + 1])) ||
	    (       dobin
		&& col > 0
		&& (ptr[col] == 'B'
		    || ptr[col] == 'b')
		&& ptr[col - 1] == '0'
		&& (!has_mbyte ||
		    !(*mb_head_off)(ptr, ptr + col - 1))
		&& vim_isbdigit(ptr[col + 1])))
	{
	    /* Found hexadecimal or binary number, move to its start. */
	    --col;
	    if (has_mbyte)
		col -= (*mb_head_off)(ptr, ptr + col);
	}
	else
	{
	    /*
	     * Search forward and then backward to find the start of number.
	     */
	    col = pos->col;

	    while (ptr[col] != NUL
		    && !vim_isdigit(ptr[col])
		    && !(doalp && ASCII_ISALPHA(ptr[col])))
		col += mb_ptr2len(ptr + col);

	    while (col > 0
		    && vim_isdigit(ptr[col - 1])
		    && !(doalp && ASCII_ISALPHA(ptr[col])))
	    {
		--col;
		if (has_mbyte)
		    col -= (*mb_head_off)(ptr, ptr + col);
	    }
	}
    }

    if (visual)
    {
	while (ptr[col] != NUL && length > 0
		&& !vim_isdigit(ptr[col])
		&& !(doalp && ASCII_ISALPHA(ptr[col])))
	{
	    int mb_len = mb_ptr2len(ptr + col);

	    col += mb_len;
	    length -= mb_len;
	}

	if (length == 0)
	    goto theend;

	if (col > pos->col && ptr[col - 1] == '-'
		&& (!has_mbyte || !(*mb_head_off)(ptr, ptr + col - 1)))
	{
	    negative = TRUE;
	    was_positive = FALSE;
	}
    }

    /*
     * If a number was found, and saving for undo works, replace the number.
     */
    firstdigit = ptr[col];
    if (!VIM_ISDIGIT(firstdigit) && !(doalp && ASCII_ISALPHA(firstdigit)))
    {
	beep_flush();
	goto theend;
    }

    if (doalp && ASCII_ISALPHA(firstdigit))
    {
	/* decrement or increment alphabetic character */
	if (op_type == OP_NR_SUB)
	{
	    if (CharOrd(firstdigit) < Prenum1)
	    {
		if (isupper(firstdigit))
		    firstdigit = 'A';
		else
		    firstdigit = 'a';
	    }
	    else
#ifdef EBCDIC
		firstdigit = EBCDIC_CHAR_ADD(firstdigit, -Prenum1);
#else
		firstdigit -= Prenum1;
#endif
	}
	else
	{
	    if (26 - CharOrd(firstdigit) - 1 < Prenum1)
	    {
		if (isupper(firstdigit))
		    firstdigit = 'Z';
		else
		    firstdigit = 'z';
	    }
	    else
#ifdef EBCDIC
		firstdigit = EBCDIC_CHAR_ADD(firstdigit, Prenum1);
#else
		firstdigit += Prenum1;
#endif
	}
	curwin->w_cursor.col = col;
	if (!did_change)
	    startpos = curwin->w_cursor;
	did_change = TRUE;
	(void)del_char(FALSE);
	ins_char(firstdigit);
	endpos = curwin->w_cursor;
	curwin->w_cursor.col = col;
    }
    else
    {
	if (col > 0 && ptr[col - 1] == '-'
		&& (!has_mbyte ||
		    !(*mb_head_off)(ptr, ptr + col - 1))
		&& !visual)
	{
	    /* negative number */
	    --col;
	    negative = TRUE;
	}
	/* get the number value (unsigned) */
	if (visual && VIsual_mode != 'V')
	    maxlen = (curbuf->b_visual.vi_curswant == MAXCOL
		    ? (int)STRLEN(ptr) - col
		    : length);

	vim_str2nr(ptr + col, &pre, &length,
		0 + (dobin ? STR2NR_BIN : 0)
		    + (dooct ? STR2NR_OCT : 0)
		    + (dohex ? STR2NR_HEX : 0),
		NULL, &n, maxlen, FALSE);

	/* ignore leading '-' for hex and octal and bin numbers */
	if (pre && negative)
	{
	    ++col;
	    --length;
	    negative = FALSE;
	}
	/* add or subtract */
	subtract = FALSE;
	if (op_type == OP_NR_SUB)
	    subtract ^= TRUE;
	if (negative)
	    subtract ^= TRUE;

	oldn = n;
	if (subtract)
	    n -= (uvarnumber_T)Prenum1;
	else
	    n += (uvarnumber_T)Prenum1;
	/* handle wraparound for decimal numbers */
	if (!pre)
	{
	    if (subtract)
	    {
		if (n > oldn)
		{
		    n = 1 + (n ^ (uvarnumber_T)-1);
		    negative ^= TRUE;
		}
	    }
	    else
	    {
		/* add */
		if (n < oldn)
		{
		    n = (n ^ (uvarnumber_T)-1);
		    negative ^= TRUE;
		}
	    }
	    if (n == 0)
		negative = FALSE;
	}

	if (visual && !was_positive && !negative && col > 0)
	{
	    /* need to remove the '-' */
	    col--;
	    length++;
	}

	/*
	 * Delete the old number.
	 */
	curwin->w_cursor.col = col;
	if (!did_change)
	    startpos = curwin->w_cursor;
	did_change = TRUE;
	todel = length;
	c = gchar_cursor();
	/*
	 * Don't include the '-' in the length, only the length of the
	 * part after it is kept the same.
	 */
	if (c == '-')
	    --length;
	while (todel-- > 0)
	{
	    if (c < 0x100 && isalpha(c))
	    {
		if (isupper(c))
		    hexupper = TRUE;
		else
		    hexupper = FALSE;
	    }
	    /* del_char() will mark line needing displaying */
	    (void)del_char(FALSE);
	    c = gchar_cursor();
	}

	/*
	 * Prepare the leading characters in buf1[].
	 * When there are many leading zeros it could be very long.
	 * Allocate a bit too much.
	 */
	buf1 = alloc(length + NUMBUFLEN);
	if (buf1 == NULL)
	    goto theend;
	ptr = buf1;
	if (negative && (!visual || was_positive))
	    *ptr++ = '-';
	if (pre)
	{
	    *ptr++ = '0';
	    --length;
	}
	if (pre == 'b' || pre == 'B' ||
	    pre == 'x' || pre == 'X')
	{
	    *ptr++ = pre;
	    --length;
	}

	/*
	 * Put the number characters in buf2[].
	 */
	if (pre == 'b' || pre == 'B')
	{
	    int i;
	    int bit = 0;
	    int bits = sizeof(uvarnumber_T) * 8;

	    /* leading zeros */
	    for (bit = bits; bit > 0; bit--)
		if ((n >> (bit - 1)) & 0x1) break;

	    for (i = 0; bit > 0; bit--)
		buf2[i++] = ((n >> (bit - 1)) & 0x1) ? '1' : '0';

	    buf2[i] = '\0';
	}
	else if (pre == 0)
	    vim_snprintf((char *)buf2, NUMBUFLEN, "%llu",
							(long_long_u_T)n);
	else if (pre == '0')
	    vim_snprintf((char *)buf2, NUMBUFLEN, "%llo",
							(long_long_u_T)n);
	else if (pre && hexupper)
	    vim_snprintf((char *)buf2, NUMBUFLEN, "%llX",
							(long_long_u_T)n);
	else
	    vim_snprintf((char *)buf2, NUMBUFLEN, "%llx",
							(long_long_u_T)n);
	length -= (int)STRLEN(buf2);

	/*
	 * Adjust number of zeros to the new number of digits, so the
	 * total length of the number remains the same.
	 * Don't do this when
	 * the result may look like an octal number.
	 */
	if (firstdigit == '0' && !(dooct && pre == 0))
	    while (length-- > 0)
		*ptr++ = '0';
	*ptr = NUL;
	STRCAT(buf1, buf2);
	ins_str(buf1);		/* insert the new number */
	vim_free(buf1);
	endpos = curwin->w_cursor;
	if (did_change && curwin->w_cursor.col)
	    --curwin->w_cursor.col;
    }

    if (did_change)
    {
	/* set the '[ and '] marks */
	curbuf->b_op_start = startpos;
	curbuf->b_op_end = endpos;
	if (curbuf->b_op_end.col > 0)
	    --curbuf->b_op_end.col;
    }

theend:
    if (visual)
	curwin->w_cursor = save_cursor;
    else if (did_change)
	curwin->w_set_curswant = TRUE;

    return did_change;
}

#if defined(FEAT_CLIPBOARD) || defined(PROTO)
/*
 * SELECTION / PRIMARY ('*')
 *
 * Text selection stuff that uses the GUI selection register '*'.  When using a
 * GUI this may be text from another window, otherwise it is the last text we
 * had highlighted with VIsual mode.  With mouse support, clicking the middle
 * button performs the paste, otherwise you will need to do <"*p>. "
 * If not under X, it is synonymous with the clipboard register '+'.
 *
 * X CLIPBOARD ('+')
 *
 * Text selection stuff that uses the GUI clipboard register '+'.
 * Under X, this matches the standard cut/paste buffer CLIPBOARD selection.
 * It will be used for unnamed cut/pasting is 'clipboard' contains "unnamed",
 * otherwise you will need to do <"+p>. "
 * If not under X, it is synonymous with the selection register '*'.
 */

/*
 * Routine to export any final X selection we had to the environment
 * so that the text is still available after Vim has exited. X selections
 * only exist while the owning application exists, so we write to the
 * permanent (while X runs) store CUT_BUFFER0.
 * Dump the CLIPBOARD selection if we own it (it's logically the more
 * 'permanent' of the two), otherwise the PRIMARY one.
 * For now, use a hard-coded sanity limit of 1Mb of data.
 */
#if (defined(FEAT_X11) && defined(FEAT_CLIPBOARD)) || defined(PROTO)
    void
x11_export_final_selection(void)
{
    Display	*dpy;
    char_u	*str = NULL;
    long_u	len = 0;
    int		motion_type = -1;

# ifdef FEAT_GUI
    if (gui.in_use)
	dpy = X_DISPLAY;
    else
# endif
# ifdef FEAT_XCLIPBOARD
	dpy = xterm_dpy;
# else
	return;
# endif

    /* Get selection to export */
    if (clip_plus.owned)
	motion_type = clip_convert_selection(&str, &len, &clip_plus);
    else if (clip_star.owned)
	motion_type = clip_convert_selection(&str, &len, &clip_star);

    /* Check it's OK */
    if (dpy != NULL && str != NULL && motion_type >= 0
					       && len < 1024*1024 && len > 0)
    {
	int ok = TRUE;

	/* The CUT_BUFFER0 is supposed to always contain latin1.  Convert from
	 * 'enc' when it is a multi-byte encoding.  When 'enc' is an 8-bit
	 * encoding conversion usually doesn't work, so keep the text as-is.
	 */
	if (has_mbyte)
	{
	    vimconv_T	vc;

	    vc.vc_type = CONV_NONE;
	    if (convert_setup(&vc, p_enc, (char_u *)"latin1") == OK)
	    {
		int	intlen = len;
		char_u	*conv_str;

		vc.vc_fail = TRUE;
		conv_str = string_convert(&vc, str, &intlen);
		len = intlen;
		if (conv_str != NULL)
		{
		    vim_free(str);
		    str = conv_str;
		}
		else
		{
		    ok = FALSE;
		}
		convert_setup(&vc, NULL, NULL);
	    }
	    else
	    {
		ok = FALSE;
	    }
	}

	/* Do not store the string if conversion failed.  Better to use any
	 * other selection than garbled text. */
	if (ok)
	{
	    XStoreBuffer(dpy, (char *)str, (int)len, 0);
	    XFlush(dpy);
	}
    }

    vim_free(str);
}
#endif
#endif /* FEAT_CLIPBOARD || PROTO */

    void
clear_oparg(oparg_T *oap)
{
    vim_memset(oap, 0, sizeof(oparg_T));
}

/*
 *  Count the number of bytes, characters and "words" in a line.
 *
 *  "Words" are counted by looking for boundaries between non-space and
 *  space characters.  (it seems to produce results that match 'wc'.)
 *
 *  Return value is byte count; word count for the line is added to "*wc".
 *  Char count is added to "*cc".
 *
 *  The function will only examine the first "limit" characters in the
 *  line, stopping if it encounters an end-of-line (NUL byte).  In that
 *  case, eol_size will be added to the character count to account for
 *  the size of the EOL character.
 */
    static varnumber_T
line_count_info(
    char_u	*line,
    varnumber_T	*wc,
    varnumber_T	*cc,
    varnumber_T	limit,
    int		eol_size)
{
    varnumber_T	i;
    varnumber_T	words = 0;
    varnumber_T	chars = 0;
    int		is_word = 0;

    for (i = 0; i < limit && line[i] != NUL; )
    {
	if (is_word)
	{
	    if (vim_isspace(line[i]))
	    {
		words++;
		is_word = 0;
	    }
	}
	else if (!vim_isspace(line[i]))
	    is_word = 1;
	++chars;
	i += (*mb_ptr2len)(line + i);
    }

    if (is_word)
	words++;
    *wc += words;

    /* Add eol_size if the end of line was reached before hitting limit. */
    if (i < limit && line[i] == NUL)
    {
	i += eol_size;
	chars += eol_size;
    }
    *cc += chars;
    return i;
}

/*
 * Give some info about the position of the cursor (for "g CTRL-G").
 * In Visual mode, give some info about the selected region.  (In this case,
 * the *_count_cursor variables store running totals for the selection.)
 * When "dict" is not NULL store the info there instead of showing it.
 */
    void
cursor_pos_info(dict_T *dict)
{
    char_u	*p;
    char_u	buf1[50];
    char_u	buf2[40];
    linenr_T	lnum;
    varnumber_T	byte_count = 0;
    varnumber_T	bom_count  = 0;
    varnumber_T	byte_count_cursor = 0;
    varnumber_T	char_count = 0;
    varnumber_T	char_count_cursor = 0;
    varnumber_T	word_count = 0;
    varnumber_T	word_count_cursor = 0;
    int		eol_size;
    varnumber_T	last_check = 100000L;
    long	line_count_selected = 0;
    pos_T	min_pos, max_pos;
    oparg_T	oparg;
    struct block_def	bd;

    /*
     * Compute the length of the file in characters.
     */
    if (curbuf->b_ml.ml_flags & ML_EMPTY)
    {
	if (dict == NULL)
	{
	    msg(_(no_lines_msg));
	    return;
	}
    }
    else
    {
	if (get_fileformat(curbuf) == EOL_DOS)
	    eol_size = 2;
	else
	    eol_size = 1;

	if (VIsual_active)
	{
	    if (LT_POS(VIsual, curwin->w_cursor))
	    {
		min_pos = VIsual;
		max_pos = curwin->w_cursor;
	    }
	    else
	    {
		min_pos = curwin->w_cursor;
		max_pos = VIsual;
	    }
	    if (*p_sel == 'e' && max_pos.col > 0)
		--max_pos.col;

	    if (VIsual_mode == Ctrl_V)
	    {
#ifdef FEAT_LINEBREAK
		char_u * saved_sbr = p_sbr;

		/* Make 'sbr' empty for a moment to get the correct size. */
		p_sbr = empty_option;
#endif
		oparg.is_VIsual = 1;
		oparg.block_mode = TRUE;
		oparg.op_type = OP_NOP;
		getvcols(curwin, &min_pos, &max_pos,
					  &oparg.start_vcol, &oparg.end_vcol);
#ifdef FEAT_LINEBREAK
		p_sbr = saved_sbr;
#endif
		if (curwin->w_curswant == MAXCOL)
		    oparg.end_vcol = MAXCOL;
		/* Swap the start, end vcol if needed */
		if (oparg.end_vcol < oparg.start_vcol)
		{
		    oparg.end_vcol += oparg.start_vcol;
		    oparg.start_vcol = oparg.end_vcol - oparg.start_vcol;
		    oparg.end_vcol -= oparg.start_vcol;
		}
	    }
	    line_count_selected = max_pos.lnum - min_pos.lnum + 1;
	}

	for (lnum = 1; lnum <= curbuf->b_ml.ml_line_count; ++lnum)
	{
	    /* Check for a CTRL-C every 100000 characters. */
	    if (byte_count > last_check)
	    {
		ui_breakcheck();
		if (got_int)
		    return;
		last_check = byte_count + 100000L;
	    }

	    /* Do extra processing for VIsual mode. */
	    if (VIsual_active
		    && lnum >= min_pos.lnum && lnum <= max_pos.lnum)
	    {
		char_u	    *s = NULL;
		long	    len = 0L;

		switch (VIsual_mode)
		{
		    case Ctrl_V:
			virtual_op = virtual_active();
			block_prep(&oparg, &bd, lnum, 0);
			virtual_op = MAYBE;
			s = bd.textstart;
			len = (long)bd.textlen;
			break;
		    case 'V':
			s = ml_get(lnum);
			len = MAXCOL;
			break;
		    case 'v':
			{
			    colnr_T start_col = (lnum == min_pos.lnum)
							   ? min_pos.col : 0;
			    colnr_T end_col = (lnum == max_pos.lnum)
				      ? max_pos.col - start_col + 1 : MAXCOL;

			    s = ml_get(lnum) + start_col;
			    len = end_col;
			}
			break;
		}
		if (s != NULL)
		{
		    byte_count_cursor += line_count_info(s, &word_count_cursor,
					   &char_count_cursor, len, eol_size);
		    if (lnum == curbuf->b_ml.ml_line_count
			    && !curbuf->b_p_eol
			    && (curbuf->b_p_bin || !curbuf->b_p_fixeol)
			    && (long)STRLEN(s) < len)
			byte_count_cursor -= eol_size;
		}
	    }
	    else
	    {
		/* In non-visual mode, check for the line the cursor is on */
		if (lnum == curwin->w_cursor.lnum)
		{
		    word_count_cursor += word_count;
		    char_count_cursor += char_count;
		    byte_count_cursor = byte_count +
			line_count_info(ml_get(lnum),
				&word_count_cursor, &char_count_cursor,
				(varnumber_T)(curwin->w_cursor.col + 1),
				eol_size);
		}
	    }
	    /* Add to the running totals */
	    byte_count += line_count_info(ml_get(lnum), &word_count,
					 &char_count, (varnumber_T)MAXCOL,
					 eol_size);
	}

	/* Correction for when last line doesn't have an EOL. */
	if (!curbuf->b_p_eol && (curbuf->b_p_bin || !curbuf->b_p_fixeol))
	    byte_count -= eol_size;

	if (dict == NULL)
	{
	    if (VIsual_active)
	    {
		if (VIsual_mode == Ctrl_V && curwin->w_curswant < MAXCOL)
		{
		    getvcols(curwin, &min_pos, &max_pos, &min_pos.col,
								    &max_pos.col);
		    vim_snprintf((char *)buf1, sizeof(buf1), _("%ld Cols; "),
			    (long)(oparg.end_vcol - oparg.start_vcol + 1));
		}
		else
		    buf1[0] = NUL;

		if (char_count_cursor == byte_count_cursor
						    && char_count == byte_count)
		    vim_snprintf((char *)IObuff, IOSIZE,
			    _("Selected %s%ld of %ld Lines; %lld of %lld Words; %lld of %lld Bytes"),
			    buf1, line_count_selected,
			    (long)curbuf->b_ml.ml_line_count,
			    (long_long_T)word_count_cursor,
			    (long_long_T)word_count,
			    (long_long_T)byte_count_cursor,
			    (long_long_T)byte_count);
		else
		    vim_snprintf((char *)IObuff, IOSIZE,
			    _("Selected %s%ld of %ld Lines; %lld of %lld Words; %lld of %lld Chars; %lld of %lld Bytes"),
			    buf1, line_count_selected,
			    (long)curbuf->b_ml.ml_line_count,
			    (long_long_T)word_count_cursor,
			    (long_long_T)word_count,
			    (long_long_T)char_count_cursor,
			    (long_long_T)char_count,
			    (long_long_T)byte_count_cursor,
			    (long_long_T)byte_count);
	    }
	    else
	    {
		p = ml_get_curline();
		validate_virtcol();
		col_print(buf1, sizeof(buf1), (int)curwin->w_cursor.col + 1,
			(int)curwin->w_virtcol + 1);
		col_print(buf2, sizeof(buf2), (int)STRLEN(p),
				    linetabsize(p));

		if (char_count_cursor == byte_count_cursor
			&& char_count == byte_count)
		    vim_snprintf((char *)IObuff, IOSIZE,
			_("Col %s of %s; Line %ld of %ld; Word %lld of %lld; Byte %lld of %lld"),
			(char *)buf1, (char *)buf2,
			(long)curwin->w_cursor.lnum,
			(long)curbuf->b_ml.ml_line_count,
			(long_long_T)word_count_cursor, (long_long_T)word_count,
			(long_long_T)byte_count_cursor, (long_long_T)byte_count);
		else
		    vim_snprintf((char *)IObuff, IOSIZE,
			_("Col %s of %s; Line %ld of %ld; Word %lld of %lld; Char %lld of %lld; Byte %lld of %lld"),
			(char *)buf1, (char *)buf2,
			(long)curwin->w_cursor.lnum,
			(long)curbuf->b_ml.ml_line_count,
			(long_long_T)word_count_cursor, (long_long_T)word_count,
			(long_long_T)char_count_cursor, (long_long_T)char_count,
			(long_long_T)byte_count_cursor, (long_long_T)byte_count);
	    }
	}

	bom_count = bomb_size();
	if (dict == NULL && bom_count > 0)
	    vim_snprintf((char *)IObuff + STRLEN(IObuff), IOSIZE,
				 _("(+%lld for BOM)"), (long_long_T)bom_count);
	if (dict == NULL)
	{
	    // Don't shorten this message, the user asked for it.
	    p = p_shm;
	    p_shm = (char_u *)"";
	    msg((char *)IObuff);
	    p_shm = p;
	}
    }
#if defined(FEAT_EVAL)
    if (dict != NULL)
    {
	dict_add_number(dict, "words", word_count);
	dict_add_number(dict, "chars", char_count);
	dict_add_number(dict, "bytes", byte_count + bom_count);
	dict_add_number(dict, VIsual_active ? "visual_bytes" : "cursor_bytes",
		byte_count_cursor);
	dict_add_number(dict, VIsual_active ? "visual_chars" : "cursor_chars",
		char_count_cursor);
	dict_add_number(dict, VIsual_active ? "visual_words" : "cursor_words",
		word_count_cursor);
    }
#endif
}

/*
 * Handle indent and format operators and visual mode ":".
 */
    static void
op_colon(oparg_T *oap)
{
    stuffcharReadbuff(':');
    if (oap->is_VIsual)
	stuffReadbuff((char_u *)"'<,'>");
    else
    {
	// Make the range look nice, so it can be repeated.
	if (oap->start.lnum == curwin->w_cursor.lnum)
	    stuffcharReadbuff('.');
	else
	    stuffnumReadbuff((long)oap->start.lnum);
	if (oap->end.lnum != oap->start.lnum)
	{
	    stuffcharReadbuff(',');
	    if (oap->end.lnum == curwin->w_cursor.lnum)
		stuffcharReadbuff('.');
	    else if (oap->end.lnum == curbuf->b_ml.ml_line_count)
		stuffcharReadbuff('$');
	    else if (oap->start.lnum == curwin->w_cursor.lnum)
	    {
		stuffReadbuff((char_u *)".+");
		stuffnumReadbuff((long)oap->line_count - 1);
	    }
	    else
		stuffnumReadbuff((long)oap->end.lnum);
	}
    }
    if (oap->op_type != OP_COLON)
	stuffReadbuff((char_u *)"!");
    if (oap->op_type == OP_INDENT)
    {
#ifndef FEAT_CINDENT
	if (*get_equalprg() == NUL)
	    stuffReadbuff((char_u *)"indent");
	else
#endif
	    stuffReadbuff(get_equalprg());
	stuffReadbuff((char_u *)"\n");
    }
    else if (oap->op_type == OP_FORMAT)
    {
	if (*curbuf->b_p_fp != NUL)
	    stuffReadbuff(curbuf->b_p_fp);
	else if (*p_fp != NUL)
	    stuffReadbuff(p_fp);
	else
	    stuffReadbuff((char_u *)"fmt");
	stuffReadbuff((char_u *)"\n']");
    }

    // do_cmdline() does the rest
}

/*
 * Handle the "g@" operator: call 'operatorfunc'.
 */
    static void
op_function(oparg_T *oap UNUSED)
{
#ifdef FEAT_EVAL
    typval_T	argv[2];
    int		save_virtual_op = virtual_op;

    if (*p_opfunc == NUL)
	emsg(_("E774: 'operatorfunc' is empty"));
    else
    {
	// Set '[ and '] marks to text to be operated on.
	curbuf->b_op_start = oap->start;
	curbuf->b_op_end = oap->end;
	if (oap->motion_type != MLINE && !oap->inclusive)
	    // Exclude the end position.
	    decl(&curbuf->b_op_end);

	argv[0].v_type = VAR_STRING;
	if (oap->block_mode)
	    argv[0].vval.v_string = (char_u *)"block";
	else if (oap->motion_type == MLINE)
	    argv[0].vval.v_string = (char_u *)"line";
	else
	    argv[0].vval.v_string = (char_u *)"char";
	argv[1].v_type = VAR_UNKNOWN;

	// Reset virtual_op so that 'virtualedit' can be changed in the
	// function.
	virtual_op = MAYBE;

	(void)call_func_retnr(p_opfunc, 1, argv);

	virtual_op = save_virtual_op;
    }
#else
    emsg(_("E775: Eval feature not available"));
#endif
}

/*
 * Calculate start/end virtual columns for operating in block mode.
 */
    static void
get_op_vcol(
    oparg_T	*oap,
    colnr_T	redo_VIsual_vcol,
    int		initial)    // when TRUE adjust position for 'selectmode'
{
    colnr_T	    start, end;

    if (VIsual_mode != Ctrl_V
	    || (!initial && oap->end.col < curwin->w_width))
	return;

    oap->block_mode = TRUE;

    // prevent from moving onto a trail byte
    if (has_mbyte)
	mb_adjustpos(curwin->w_buffer, &oap->end);

    getvvcol(curwin, &(oap->start), &oap->start_vcol, NULL, &oap->end_vcol);

    if (!redo_VIsual_busy)
    {
	getvvcol(curwin, &(oap->end), &start, NULL, &end);

	if (start < oap->start_vcol)
	    oap->start_vcol = start;
	if (end > oap->end_vcol)
	{
	    if (initial && *p_sel == 'e' && start >= 1
				    && start - 1 >= oap->end_vcol)
		oap->end_vcol = start - 1;
	    else
		oap->end_vcol = end;
	}
    }

    // if '$' was used, get oap->end_vcol from longest line
    if (curwin->w_curswant == MAXCOL)
    {
	curwin->w_cursor.col = MAXCOL;
	oap->end_vcol = 0;
	for (curwin->w_cursor.lnum = oap->start.lnum;
		curwin->w_cursor.lnum <= oap->end.lnum;
					++curwin->w_cursor.lnum)
	{
	    getvvcol(curwin, &curwin->w_cursor, NULL, NULL, &end);
	    if (end > oap->end_vcol)
		oap->end_vcol = end;
	}
    }
    else if (redo_VIsual_busy)
	oap->end_vcol = oap->start_vcol + redo_VIsual_vcol - 1;
    // Correct oap->end.col and oap->start.col to be the
    // upper-left and lower-right corner of the block area.
    //
    // (Actually, this does convert column positions into character
    // positions)
    curwin->w_cursor.lnum = oap->end.lnum;
    coladvance(oap->end_vcol);
    oap->end = curwin->w_cursor;

    curwin->w_cursor = oap->start;
    coladvance(oap->start_vcol);
    oap->start = curwin->w_cursor;
}

/*
 * Handle an operator after Visual mode or when the movement is finished.
 * "gui_yank" is true when yanking text for the clipboard.
 */
    void
do_pending_operator(cmdarg_T *cap, int old_col, int gui_yank)
{
    oparg_T	*oap = cap->oap;
    pos_T	old_cursor;
    int		empty_region_error;
    int		restart_edit_save;
#ifdef FEAT_LINEBREAK
    int		lbr_saved = curwin->w_p_lbr;
#endif

    // The visual area is remembered for redo
    static int	    redo_VIsual_mode = NUL; // 'v', 'V', or Ctrl-V
    static linenr_T redo_VIsual_line_count; // number of lines
    static colnr_T  redo_VIsual_vcol;	    // number of cols or end column
    static long	    redo_VIsual_count;	    // count for Visual operator
    static int	    redo_VIsual_arg;	    // extra argument
    int		    include_line_break = FALSE;

#if defined(FEAT_CLIPBOARD)
    // Yank the visual area into the GUI selection register before we operate
    // on it and lose it forever.
    // Don't do it if a specific register was specified, so that ""x"*P works.
    // This could call do_pending_operator() recursively, but that's OK
    // because gui_yank will be TRUE for the nested call.
    if ((clip_star.available || clip_plus.available)
	    && oap->op_type != OP_NOP
	    && !gui_yank
	    && VIsual_active
	    && !redo_VIsual_busy
	    && oap->regname == 0)
	clip_auto_select();
#endif
    old_cursor = curwin->w_cursor;

    // If an operation is pending, handle it...
    if ((finish_op || VIsual_active) && oap->op_type != OP_NOP)
    {
	// Yank can be redone when 'y' is in 'cpoptions', but not when yanking
	// for the clipboard.
	int	redo_yank = vim_strchr(p_cpo, CPO_YANK) != NULL && !gui_yank;

#ifdef FEAT_LINEBREAK
	// Avoid a problem with unwanted linebreaks in block mode.
	if (curwin->w_p_lbr)
	    curwin->w_valid &= ~VALID_VIRTCOL;
	curwin->w_p_lbr = FALSE;
#endif
	oap->is_VIsual = VIsual_active;
	if (oap->motion_force == 'V')
	    oap->motion_type = MLINE;
	else if (oap->motion_force == 'v')
	{
	    // If the motion was linewise, "inclusive" will not have been set.
	    // Use "exclusive" to be consistent.  Makes "dvj" work nice.
	    if (oap->motion_type == MLINE)
		oap->inclusive = FALSE;
	    // If the motion already was characterwise, toggle "inclusive"
	    else if (oap->motion_type == MCHAR)
		oap->inclusive = !oap->inclusive;
	    oap->motion_type = MCHAR;
	}
	else if (oap->motion_force == Ctrl_V)
	{
	    // Change line- or characterwise motion into Visual block mode.
	    if (!VIsual_active)
	    {
		VIsual_active = TRUE;
		VIsual = oap->start;
	    }
	    VIsual_mode = Ctrl_V;
	    VIsual_select = FALSE;
	    VIsual_reselect = FALSE;
	}

	// Only redo yank when 'y' flag is in 'cpoptions'.
	// Never redo "zf" (define fold).
	if ((redo_yank || oap->op_type != OP_YANK)
		&& ((!VIsual_active || oap->motion_force)
		    // Also redo Operator-pending Visual mode mappings
		    || (VIsual_active && cap->cmdchar == ':'
						 && oap->op_type != OP_COLON))
		&& cap->cmdchar != 'D'
#ifdef FEAT_FOLDING
		&& oap->op_type != OP_FOLD
		&& oap->op_type != OP_FOLDOPEN
		&& oap->op_type != OP_FOLDOPENREC
		&& oap->op_type != OP_FOLDCLOSE
		&& oap->op_type != OP_FOLDCLOSEREC
		&& oap->op_type != OP_FOLDDEL
		&& oap->op_type != OP_FOLDDELREC
#endif
		)
	{
	    prep_redo(oap->regname, cap->count0,
		    get_op_char(oap->op_type), get_extra_op_char(oap->op_type),
		    oap->motion_force, cap->cmdchar, cap->nchar);
	    if (cap->cmdchar == '/' || cap->cmdchar == '?') // was a search
	    {
		// If 'cpoptions' does not contain 'r', insert the search
		// pattern to really repeat the same command.
		if (vim_strchr(p_cpo, CPO_REDO) == NULL)
		    AppendToRedobuffLit(cap->searchbuf, -1);
		AppendToRedobuff(NL_STR);
	    }
	    else if (cap->cmdchar == ':')
	    {
		// do_cmdline() has stored the first typed line in
		// "repeat_cmdline".  When several lines are typed repeating
		// won't be possible.
		if (repeat_cmdline == NULL)
		    ResetRedobuff();
		else
		{
		    AppendToRedobuffLit(repeat_cmdline, -1);
		    AppendToRedobuff(NL_STR);
		    VIM_CLEAR(repeat_cmdline);
		}
	    }
	}

	if (redo_VIsual_busy)
	{
	    // Redo of an operation on a Visual area. Use the same size from
	    // redo_VIsual_line_count and redo_VIsual_vcol.
	    oap->start = curwin->w_cursor;
	    curwin->w_cursor.lnum += redo_VIsual_line_count - 1;
	    if (curwin->w_cursor.lnum > curbuf->b_ml.ml_line_count)
		curwin->w_cursor.lnum = curbuf->b_ml.ml_line_count;
	    VIsual_mode = redo_VIsual_mode;
	    if (redo_VIsual_vcol == MAXCOL || VIsual_mode == 'v')
	    {
		if (VIsual_mode == 'v')
		{
		    if (redo_VIsual_line_count <= 1)
		    {
			validate_virtcol();
			curwin->w_curswant =
				     curwin->w_virtcol + redo_VIsual_vcol - 1;
		    }
		    else
			curwin->w_curswant = redo_VIsual_vcol;
		}
		else
		{
		    curwin->w_curswant = MAXCOL;
		}
		coladvance(curwin->w_curswant);
	    }
	    cap->count0 = redo_VIsual_count;
	    if (redo_VIsual_count != 0)
		cap->count1 = redo_VIsual_count;
	    else
		cap->count1 = 1;
	}
	else if (VIsual_active)
	{
	    if (!gui_yank)
	    {
		// Save the current VIsual area for '< and '> marks, and "gv"
		curbuf->b_visual.vi_start = VIsual;
		curbuf->b_visual.vi_end = curwin->w_cursor;
		curbuf->b_visual.vi_mode = VIsual_mode;
		restore_visual_mode();
		curbuf->b_visual.vi_curswant = curwin->w_curswant;
# ifdef FEAT_EVAL
		curbuf->b_visual_mode_eval = VIsual_mode;
# endif
	    }

	    // In Select mode, a linewise selection is operated upon like a
	    // characterwise selection.
	    // Special case: gH<Del> deletes the last line.
	    if (VIsual_select && VIsual_mode == 'V'
					    && cap->oap->op_type != OP_DELETE)
	    {
		if (LT_POS(VIsual, curwin->w_cursor))
		{
		    VIsual.col = 0;
		    curwin->w_cursor.col =
			       (colnr_T)STRLEN(ml_get(curwin->w_cursor.lnum));
		}
		else
		{
		    curwin->w_cursor.col = 0;
		    VIsual.col = (colnr_T)STRLEN(ml_get(VIsual.lnum));
		}
		VIsual_mode = 'v';
	    }
	    // If 'selection' is "exclusive", backup one character for
	    // charwise selections.
	    else if (VIsual_mode == 'v')
		include_line_break = unadjust_for_sel();

	    oap->start = VIsual;
	    if (VIsual_mode == 'V')
	    {
		oap->start.col = 0;
		oap->start.coladd = 0;
	    }
	}

	// Set oap->start to the first position of the operated text, oap->end
	// to the end of the operated text.  w_cursor is equal to oap->start.
	if (LT_POS(oap->start, curwin->w_cursor))
	{
#ifdef FEAT_FOLDING
	    // Include folded lines completely.
	    if (!VIsual_active)
	    {
		if (hasFolding(oap->start.lnum, &oap->start.lnum, NULL))
		    oap->start.col = 0;
		if ((curwin->w_cursor.col > 0 || oap->inclusive)
			&& hasFolding(curwin->w_cursor.lnum, NULL,
						      &curwin->w_cursor.lnum))
		    curwin->w_cursor.col = (colnr_T)STRLEN(ml_get_curline());
	    }
#endif
	    oap->end = curwin->w_cursor;
	    curwin->w_cursor = oap->start;

	    // w_virtcol may have been updated; if the cursor goes back to its
	    // previous position w_virtcol becomes invalid and isn't updated
	    // automatically.
	    curwin->w_valid &= ~VALID_VIRTCOL;
	}
	else
	{
#ifdef FEAT_FOLDING
	    // Include folded lines completely.
	    if (!VIsual_active && oap->motion_type == MLINE)
	    {
		if (hasFolding(curwin->w_cursor.lnum, &curwin->w_cursor.lnum,
									NULL))
		    curwin->w_cursor.col = 0;
		if (hasFolding(oap->start.lnum, NULL, &oap->start.lnum))
		    oap->start.col = (colnr_T)STRLEN(ml_get(oap->start.lnum));
	    }
#endif
	    oap->end = oap->start;
	    oap->start = curwin->w_cursor;
	}

	// Just in case lines were deleted that make the position invalid.
	check_pos(curwin->w_buffer, &oap->end);
	oap->line_count = oap->end.lnum - oap->start.lnum + 1;

	// Set "virtual_op" before resetting VIsual_active.
	virtual_op = virtual_active();

	if (VIsual_active || redo_VIsual_busy)
	{
	    get_op_vcol(oap, redo_VIsual_vcol, TRUE);

	    if (!redo_VIsual_busy && !gui_yank)
	    {
		// Prepare to reselect and redo Visual: this is based on the
		// size of the Visual text
		resel_VIsual_mode = VIsual_mode;
		if (curwin->w_curswant == MAXCOL)
		    resel_VIsual_vcol = MAXCOL;
		else
		{
		    if (VIsual_mode != Ctrl_V)
			getvvcol(curwin, &(oap->end),
						  NULL, NULL, &oap->end_vcol);
		    if (VIsual_mode == Ctrl_V || oap->line_count <= 1)
		    {
			if (VIsual_mode != Ctrl_V)
			    getvvcol(curwin, &(oap->start),
						&oap->start_vcol, NULL, NULL);
			resel_VIsual_vcol = oap->end_vcol - oap->start_vcol + 1;
		    }
		    else
			resel_VIsual_vcol = oap->end_vcol;
		}
		resel_VIsual_line_count = oap->line_count;
	    }

	    // can't redo yank (unless 'y' is in 'cpoptions') and ":"
	    if ((redo_yank || oap->op_type != OP_YANK)
		    && oap->op_type != OP_COLON
#ifdef FEAT_FOLDING
		    && oap->op_type != OP_FOLD
		    && oap->op_type != OP_FOLDOPEN
		    && oap->op_type != OP_FOLDOPENREC
		    && oap->op_type != OP_FOLDCLOSE
		    && oap->op_type != OP_FOLDCLOSEREC
		    && oap->op_type != OP_FOLDDEL
		    && oap->op_type != OP_FOLDDELREC
#endif
		    && oap->motion_force == NUL
		    )
	    {
		// Prepare for redoing.  Only use the nchar field for "r",
		// otherwise it might be the second char of the operator.
		if (cap->cmdchar == 'g' && (cap->nchar == 'n'
							|| cap->nchar == 'N'))
		    prep_redo(oap->regname, cap->count0,
			    get_op_char(oap->op_type), get_extra_op_char(oap->op_type),
			    oap->motion_force, cap->cmdchar, cap->nchar);
		else if (cap->cmdchar != ':')
		{
		    int nchar = oap->op_type == OP_REPLACE ? cap->nchar : NUL;

		    // reverse what nv_replace() did
		    if (nchar == REPLACE_CR_NCHAR)
			nchar = CAR;
		    else if (nchar == REPLACE_NL_NCHAR)
			nchar = NL;
		    prep_redo(oap->regname, 0L, NUL, 'v',
					get_op_char(oap->op_type),
					get_extra_op_char(oap->op_type),
					nchar);
		}
		if (!redo_VIsual_busy)
		{
		    redo_VIsual_mode = resel_VIsual_mode;
		    redo_VIsual_vcol = resel_VIsual_vcol;
		    redo_VIsual_line_count = resel_VIsual_line_count;
		    redo_VIsual_count = cap->count0;
		    redo_VIsual_arg = cap->arg;
		}
	    }

	    // oap->inclusive defaults to TRUE.
	    // If oap->end is on a NUL (empty line) oap->inclusive becomes
	    // FALSE.  This makes "d}P" and "v}dP" work the same.
	    if (oap->motion_force == NUL || oap->motion_type == MLINE)
		oap->inclusive = TRUE;
	    if (VIsual_mode == 'V')
		oap->motion_type = MLINE;
	    else
	    {
		oap->motion_type = MCHAR;
		if (VIsual_mode != Ctrl_V && *ml_get_pos(&(oap->end)) == NUL
			&& (include_line_break || !virtual_op))
		{
		    oap->inclusive = FALSE;
		    // Try to include the newline, unless it's an operator
		    // that works on lines only.
		    if (*p_sel != 'o'
			    && !op_on_lines(oap->op_type)
			    && oap->end.lnum < curbuf->b_ml.ml_line_count)
		    {
			++oap->end.lnum;
			oap->end.col = 0;
			oap->end.coladd = 0;
			++oap->line_count;
		    }
		}
	    }

	    redo_VIsual_busy = FALSE;

	    // Switch Visual off now, so screen updating does
	    // not show inverted text when the screen is redrawn.
	    // With OP_YANK and sometimes with OP_COLON and OP_FILTER there is
	    // no screen redraw, so it is done here to remove the inverted
	    // part.
	    if (!gui_yank)
	    {
		VIsual_active = FALSE;
		setmouse();
		mouse_dragging = 0;
		may_clear_cmdline();
		if ((oap->op_type == OP_YANK
			    || oap->op_type == OP_COLON
			    || oap->op_type == OP_FUNCTION
			    || oap->op_type == OP_FILTER)
			&& oap->motion_force == NUL)
		{
#ifdef FEAT_LINEBREAK
		    // make sure redrawing is correct
		    curwin->w_p_lbr = lbr_saved;
#endif
		    redraw_curbuf_later(INVERTED);
		}
	    }
	}

	// Include the trailing byte of a multi-byte char.
	if (has_mbyte && oap->inclusive)
	{
	    int		l;

	    l = (*mb_ptr2len)(ml_get_pos(&oap->end));
	    if (l > 1)
		oap->end.col += l - 1;
	}
	curwin->w_set_curswant = TRUE;

	// oap->empty is set when start and end are the same.  The inclusive
	// flag affects this too, unless yanking and the end is on a NUL.
	oap->empty = (oap->motion_type == MCHAR
		    && (!oap->inclusive
			|| (oap->op_type == OP_YANK
			    && gchar_pos(&oap->end) == NUL))
		    && EQUAL_POS(oap->start, oap->end)
		    && !(virtual_op && oap->start.coladd != oap->end.coladd));
	// For delete, change and yank, it's an error to operate on an
	// empty region, when 'E' included in 'cpoptions' (Vi compatible).
	empty_region_error = (oap->empty
				&& vim_strchr(p_cpo, CPO_EMPTYREGION) != NULL);

	// Force a redraw when operating on an empty Visual region, when
	// 'modifiable is off or creating a fold.
	if (oap->is_VIsual && (oap->empty || !curbuf->b_p_ma
#ifdef FEAT_FOLDING
		    || oap->op_type == OP_FOLD
#endif
		    ))
	{
#ifdef FEAT_LINEBREAK
	    curwin->w_p_lbr = lbr_saved;
#endif
	    redraw_curbuf_later(INVERTED);
	}

	// If the end of an operator is in column one while oap->motion_type
	// is MCHAR and oap->inclusive is FALSE, we put op_end after the last
	// character in the previous line. If op_start is on or before the
	// first non-blank in the line, the operator becomes linewise
	// (strange, but that's the way vi does it).
	if (	   oap->motion_type == MCHAR
		&& oap->inclusive == FALSE
		&& !(cap->retval & CA_NO_ADJ_OP_END)
		&& oap->end.col == 0
		&& (!oap->is_VIsual || *p_sel == 'o')
		&& !oap->block_mode
		&& oap->line_count > 1)
	{
	    oap->end_adjusted = TRUE;	    // remember that we did this
	    --oap->line_count;
	    --oap->end.lnum;
	    if (inindent(0))
		oap->motion_type = MLINE;
	    else
	    {
		oap->end.col = (colnr_T)STRLEN(ml_get(oap->end.lnum));
		if (oap->end.col)
		{
		    --oap->end.col;
		    oap->inclusive = TRUE;
		}
	    }
	}
	else
	    oap->end_adjusted = FALSE;

	switch (oap->op_type)
	{
	case OP_LSHIFT:
	case OP_RSHIFT:
	    op_shift(oap, TRUE, oap->is_VIsual ? (int)cap->count1 : 1);
	    auto_format(FALSE, TRUE);
	    break;

	case OP_JOIN_NS:
	case OP_JOIN:
	    if (oap->line_count < 2)
		oap->line_count = 2;
	    if (curwin->w_cursor.lnum + oap->line_count - 1 >
						   curbuf->b_ml.ml_line_count)
		beep_flush();
	    else
	    {
		(void)do_join(oap->line_count, oap->op_type == OP_JOIN,
							    TRUE, TRUE, TRUE);
		auto_format(FALSE, TRUE);
	    }
	    break;

	case OP_DELETE:
	    VIsual_reselect = FALSE;	    // don't reselect now
	    if (empty_region_error)
	    {
		vim_beep(BO_OPER);
		CancelRedo();
	    }
	    else
	    {
		(void)op_delete(oap);
		if (oap->motion_type == MLINE && has_format_option(FO_AUTO))
		    u_save_cursor();	    // cursor line wasn't saved yet
		auto_format(FALSE, TRUE);
	    }
	    break;

	case OP_YANK:
	    if (empty_region_error)
	    {
		if (!gui_yank)
		{
		    vim_beep(BO_OPER);
		    CancelRedo();
		}
	    }
	    else
	    {
#ifdef FEAT_LINEBREAK
		curwin->w_p_lbr = lbr_saved;
#endif
		(void)op_yank(oap, FALSE, !gui_yank);
	    }
	    check_cursor_col();
	    break;

	case OP_CHANGE:
	    VIsual_reselect = FALSE;	    // don't reselect now
	    if (empty_region_error)
	    {
		vim_beep(BO_OPER);
		CancelRedo();
	    }
	    else
	    {
		// This is a new edit command, not a restart.  Need to
		// remember it to make 'insertmode' work with mappings for
		// Visual mode.  But do this only once and not when typed and
		// 'insertmode' isn't set.
		if (p_im || !KeyTyped)
		    restart_edit_save = restart_edit;
		else
		    restart_edit_save = 0;
		restart_edit = 0;
#ifdef FEAT_LINEBREAK
		// Restore linebreak, so that when the user edits it looks as
		// before.
		if (curwin->w_p_lbr != lbr_saved)
		{
		    curwin->w_p_lbr = lbr_saved;
		    get_op_vcol(oap, redo_VIsual_mode, FALSE);
		}
#endif
		// Reset finish_op now, don't want it set inside edit().
		finish_op = FALSE;
		if (op_change(oap))	// will call edit()
		    cap->retval |= CA_COMMAND_BUSY;
		if (restart_edit == 0)
		    restart_edit = restart_edit_save;
	    }
	    break;

	case OP_FILTER:
	    if (vim_strchr(p_cpo, CPO_FILTER) != NULL)
		AppendToRedobuff((char_u *)"!\r");  // use any last used !cmd
	    else
		bangredo = TRUE;    // do_bang() will put cmd in redo buffer
	    // FALLTHROUGH

	case OP_INDENT:
	case OP_COLON:

#if defined(FEAT_LISP) || defined(FEAT_CINDENT)
	    // If 'equalprg' is empty, do the indenting internally.
	    if (oap->op_type == OP_INDENT && *get_equalprg() == NUL)
	    {
# ifdef FEAT_LISP
		if (curbuf->b_p_lisp)
		{
		    op_reindent(oap, get_lisp_indent);
		    break;
		}
# endif
# ifdef FEAT_CINDENT
		op_reindent(oap,
#  ifdef FEAT_EVAL
			*curbuf->b_p_inde != NUL ? get_expr_indent :
#  endif
			    get_c_indent);
		break;
# endif
	    }
#endif

	    op_colon(oap);
	    break;

	case OP_TILDE:
	case OP_UPPER:
	case OP_LOWER:
	case OP_ROT13:
	    if (empty_region_error)
	    {
		vim_beep(BO_OPER);
		CancelRedo();
	    }
	    else
		op_tilde(oap);
	    check_cursor_col();
	    break;

	case OP_FORMAT:
#if defined(FEAT_EVAL)
	    if (*curbuf->b_p_fex != NUL)
		op_formatexpr(oap);	// use expression
	    else
#endif
		if (*p_fp != NUL || *curbuf->b_p_fp != NUL)
		op_colon(oap);		// use external command
	    else
		op_format(oap, FALSE);	// use internal function
	    break;

	case OP_FORMAT2:
	    op_format(oap, TRUE);	// use internal function
	    break;

	case OP_FUNCTION:
#ifdef FEAT_LINEBREAK
	    // Restore linebreak, so that when the user edits it looks as
	    // before.
	    curwin->w_p_lbr = lbr_saved;
#endif
	    op_function(oap);		// call 'operatorfunc'
	    break;

	case OP_INSERT:
	case OP_APPEND:
	    VIsual_reselect = FALSE;	// don't reselect now
	    if (empty_region_error)
	    {
		vim_beep(BO_OPER);
		CancelRedo();
	    }
	    else
	    {
		// This is a new edit command, not a restart.  Need to
		// remember it to make 'insertmode' work with mappings for
		// Visual mode.  But do this only once.
		restart_edit_save = restart_edit;
		restart_edit = 0;
#ifdef FEAT_LINEBREAK
		// Restore linebreak, so that when the user edits it looks as
		// before.
		if (curwin->w_p_lbr != lbr_saved)
		{
		    curwin->w_p_lbr = lbr_saved;
		    get_op_vcol(oap, redo_VIsual_mode, FALSE);
		}
#endif
		op_insert(oap, cap->count1);
#ifdef FEAT_LINEBREAK
		// Reset linebreak, so that formatting works correctly.
		curwin->w_p_lbr = FALSE;
#endif

		// TODO: when inserting in several lines, should format all
		// the lines.
		auto_format(FALSE, TRUE);

		if (restart_edit == 0)
		    restart_edit = restart_edit_save;
		else
		    cap->retval |= CA_COMMAND_BUSY;
	    }
	    break;

	case OP_REPLACE:
	    VIsual_reselect = FALSE;	// don't reselect now
	    if (empty_region_error)
	    {
		vim_beep(BO_OPER);
		CancelRedo();
	    }
	    else
	    {
#ifdef FEAT_LINEBREAK
		// Restore linebreak, so that when the user edits it looks as
		// before.
		if (curwin->w_p_lbr != lbr_saved)
		{
		    curwin->w_p_lbr = lbr_saved;
		    get_op_vcol(oap, redo_VIsual_mode, FALSE);
		}
#endif
		op_replace(oap, cap->nchar);
	    }
	    break;

#ifdef FEAT_FOLDING
	case OP_FOLD:
	    VIsual_reselect = FALSE;	// don't reselect now
	    foldCreate(oap->start.lnum, oap->end.lnum);
	    break;

	case OP_FOLDOPEN:
	case OP_FOLDOPENREC:
	case OP_FOLDCLOSE:
	case OP_FOLDCLOSEREC:
	    VIsual_reselect = FALSE;	// don't reselect now
	    opFoldRange(oap->start.lnum, oap->end.lnum,
		    oap->op_type == OP_FOLDOPEN
					    || oap->op_type == OP_FOLDOPENREC,
		    oap->op_type == OP_FOLDOPENREC
					  || oap->op_type == OP_FOLDCLOSEREC,
					  oap->is_VIsual);
	    break;

	case OP_FOLDDEL:
	case OP_FOLDDELREC:
	    VIsual_reselect = FALSE;	// don't reselect now
	    deleteFold(oap->start.lnum, oap->end.lnum,
			       oap->op_type == OP_FOLDDELREC, oap->is_VIsual);
	    break;
#endif
	case OP_NR_ADD:
	case OP_NR_SUB:
	    if (empty_region_error)
	    {
		vim_beep(BO_OPER);
		CancelRedo();
	    }
	    else
	    {
		VIsual_active = TRUE;
#ifdef FEAT_LINEBREAK
		curwin->w_p_lbr = lbr_saved;
#endif
		op_addsub(oap, cap->count1, redo_VIsual_arg);
		VIsual_active = FALSE;
	    }
	    check_cursor_col();
	    break;
	default:
	    clearopbeep(oap);
	}
	virtual_op = MAYBE;
	if (!gui_yank)
	{
	    // if 'sol' not set, go back to old column for some commands
	    if (!p_sol && oap->motion_type == MLINE && !oap->end_adjusted
		    && (oap->op_type == OP_LSHIFT || oap->op_type == OP_RSHIFT
						|| oap->op_type == OP_DELETE))
	    {
#ifdef FEAT_LINEBREAK
		curwin->w_p_lbr = FALSE;
#endif
		coladvance(curwin->w_curswant = old_col);
	    }
	}
	else
	{
	    curwin->w_cursor = old_cursor;
	}
	oap->block_mode = FALSE;
	clearop(oap);
	motion_force = NUL;
    }
#ifdef FEAT_LINEBREAK
    curwin->w_p_lbr = lbr_saved;
#endif
}