text: /* vi:set ts=8 sts=4 sw=4:
   *
   * VIM - Vi IMproved	by Bram Moolenaar
   *
   * Do ":help uganda"  in Vim to read copying and usage conditions.
   * Do ":help credits" in Vim to see a list of people who contributed.
   * See README.txt for an overview of the Vim source code.
   */
  
  /*
   * ex_cmds.c: some functions for command line commands
   */
  
  #include "vim.h"
  #include "version.h"
  
  #ifdef FEAT_EX_EXTRA
  static int linelen __ARGS((int *has_tab));
  #endif
  static void do_filter __ARGS((linenr_T line1, linenr_T line2, exarg_T *eap, char_u *cmd, int do_in, int do_out));
  #ifdef FEAT_VIMINFO
  static char_u *viminfo_filename __ARGS((char_u	*));
  static void do_viminfo __ARGS((FILE *fp_in, FILE *fp_out, int flags));
  static int viminfo_encoding __ARGS((vir_T *virp));
  static int read_viminfo_up_to_marks __ARGS((vir_T *virp, int forceit, int writing));
  #endif
  
  static int check_readonly __ARGS((int *forceit, buf_T *buf));
  #ifdef FEAT_AUTOCMD
  static void delbuf_msg __ARGS((char_u *name));
  #endif
  static int
  #ifdef __BORLANDC__
      _RTLENTRYF
  #endif
  	help_compare __ARGS((const void *s1, const void *s2));
  
  /*
   * ":ascii" and "ga".
   */
      void
  do_ascii(eap)
      exarg_T	*eap UNUSED;
  {
      int		c;
      int		cval;
      char	buf1[20];
      char	buf2[20];
      char_u	buf3[7];
  #ifdef FEAT_MBYTE
      int		cc[MAX_MCO];
      int		ci = 0;
      int		len;
  
      if (enc_utf8)
  	c = utfc_ptr2char(ml_get_cursor(), cc);
      else
  #endif
  	c = gchar_cursor();
      if (c == NUL)
      {
  	MSG("NUL");
  	return;
      }
  
  #ifdef FEAT_MBYTE
      IObuff[0] = NUL;
      if (!has_mbyte || (enc_dbcs != 0 && c < 0x100) || c < 0x80)
  #endif
      {
  	if (c == NL)	    /* NUL is stored as NL */
  	    c = NUL;
  	if (c == CAR && get_fileformat(curbuf) == EOL_MAC)
  	    cval = NL;	    /* NL is stored as CR */
  	else
  	    cval = c;
  	if (vim_isprintc_strict(c) && (c < ' '
  #ifndef EBCDIC
  		    || c > '~'
  #endif
  			       ))
  	{
  	    transchar_nonprint(buf3, c);
  	    vim_snprintf(buf1, sizeof(buf1), "  <%s>", (char *)buf3);
  	}
  	else
  	    buf1[0] = NUL;
  #ifndef EBCDIC
  	if (c >= 0x80)
  	    vim_snprintf(buf2, sizeof(buf2), "  <M-%s>",
  						 (char *)transchar(c & 0x7f));
  	else
  #endif
  	    buf2[0] = NUL;
  	vim_snprintf((char *)IObuff, IOSIZE,
  		_("<%s>%s%s  %d,  Hex %02x,  Octal %03o"),
  				  transchar(c), buf1, buf2, cval, cval, cval);
  #ifdef FEAT_MBYTE
  	if (enc_utf8)
  	    c = cc[ci++];
  	else
  	    c = 0;
  #endif
      }
  
  #ifdef FEAT_MBYTE
      /* Repeat for combining characters. */
      while (has_mbyte && (c >= 0x100 || (enc_utf8 && c >= 0x80)))
      {
  	len = (int)STRLEN(IObuff);
  	/* This assumes every multi-byte char is printable... */
  	if (len > 0)
  	    IObuff[len++] = ' ';
  	IObuff[len++] = '<';
  	if (enc_utf8 && utf_iscomposing(c)
  # ifdef USE_GUI
  		&& !gui.in_use
  # endif
  		)
  	    IObuff[len++] = ' '; /* draw composing char on top of a space */
  	len += (*mb_char2bytes)(c, IObuff + len);
  	vim_snprintf((char *)IObuff + len, IOSIZE - len,
  			c < 0x10000 ? _("> %d, Hex %04x, Octal %o")
  				    : _("> %d, Hex %08x, Octal %o"), c, c, c);
  	if (ci == MAX_MCO)
  	    break;
  	if (enc_utf8)
  	    c = cc[ci++];
  	else
  	    c = 0;
      }
  #endif
  
      msg(IObuff);
  }
  
  #if defined(FEAT_EX_EXTRA) || defined(PROTO)
  /*
   * ":left", ":center" and ":right": align text.
   */
      void
  ex_align(eap)
      exarg_T	*eap;
  {
      pos_T	save_curpos;
      int		len;
      int		indent = 0;
      int		new_indent;
      int		has_tab;
      int		width;
  
  #ifdef FEAT_RIGHTLEFT
      if (curwin->w_p_rl)
      {
  	/* switch left and right aligning */
  	if (eap->cmdidx == CMD_right)
  	    eap->cmdidx = CMD_left;
  	else if (eap->cmdidx == CMD_left)
  	    eap->cmdidx = CMD_right;
      }
  #endif
  
      width = atoi((char *)eap->arg);
      save_curpos = curwin->w_cursor;
      if (eap->cmdidx == CMD_left)    /* width is used for new indent */
      {
  	if (width >= 0)
  	    indent = width;
      }
      else
      {
  	/*
  	 * if 'textwidth' set, use it
  	 * else if 'wrapmargin' set, use it
  	 * if invalid value, use 80
  	 */
  	if (width <= 0)
  	    width = curbuf->b_p_tw;
  	if (width == 0 && curbuf->b_p_wm > 0)
  	    width = W_WIDTH(curwin) - curbuf->b_p_wm;
  	if (width <= 0)
  	    width = 80;
      }
  
      if (u_save((linenr_T)(eap->line1 - 1), (linenr_T)(eap->line2 + 1)) == FAIL)
  	return;
  
      for (curwin->w_cursor.lnum = eap->line1;
  		 curwin->w_cursor.lnum <= eap->line2; ++curwin->w_cursor.lnum)
      {
  	if (eap->cmdidx == CMD_left)		/* left align */
  	    new_indent = indent;
  	else
  	{
  	    has_tab = FALSE;	/* avoid uninit warnings */
  	    len = linelen(eap->cmdidx == CMD_right ? &has_tab
  						   : NULL) - get_indent();
  
  	    if (len <= 0)			/* skip blank lines */
  		continue;
  
  	    if (eap->cmdidx == CMD_center)
  		new_indent = (width - len) / 2;
  	    else
  	    {
  		new_indent = width - len;	/* right align */
  
  		/*
  		 * Make sure that embedded TABs don't make the text go too far
  		 * to the right.
  		 */
  		if (has_tab)
  		    while (new_indent > 0)
  		    {
  			(void)set_indent(new_indent, 0);
  			if (linelen(NULL) <= width)
  			{
  			    /*
  			     * Now try to move the line as much as possible to
  			     * the right.  Stop when it moves too far.
  			     */
  			    do
  				(void)set_indent(++new_indent, 0);
  			    while (linelen(NULL) <= width);
  			    --new_indent;
  			    break;
  			}
  			--new_indent;
  		    }
  	    }
  	}
  	if (new_indent < 0)
  	    new_indent = 0;
  	(void)set_indent(new_indent, 0);		/* set indent */
      }
      changed_lines(eap->line1, 0, eap->line2 + 1, 0L);
      curwin->w_cursor = save_curpos;
      beginline(BL_WHITE | BL_FIX);
  }
  
  /*
   * Get the length of the current line, excluding trailing white space.
   */
      static int
  linelen(has_tab)
      int	    *has_tab;
  {
      char_u  *line;
      char_u  *first;
      char_u  *last;
      int	    save;
      int	    len;
  
      /* find the first non-blank character */
      line = ml_get_curline();
      first = skipwhite(line);
  
      /* find the character after the last non-blank character */
      for (last = first + STRLEN(first);
  				last > first && vim_iswhite(last[-1]); --last)
  	;
      save = *last;
      *last = NUL;
      len = linetabsize(line);		/* get line length */
      if (has_tab != NULL)		/* check for embedded TAB */
  	*has_tab = (vim_strrchr(first, TAB) != NULL);
      *last = save;
  
      return len;
  }
  
  /* Buffer for two lines used during sorting.  They are allocated to
   * contain the longest line being sorted. */
  static char_u	*sortbuf1;
  static char_u	*sortbuf2;
  
  static int	sort_ic;		/* ignore case */
  static int	sort_nr;		/* sort on number */
  static int	sort_rx;		/* sort on regex instead of skipping it */
  
  static int	sort_abort;		/* flag to indicate if sorting has been interrupted */
  
  /* Struct to store info to be sorted. */
  typedef struct
  {
      linenr_T	lnum;			/* line number */
      long	start_col_nr;		/* starting column number or number */
      long	end_col_nr;		/* ending column number */
  } sorti_T;
  
  static int
  #ifdef __BORLANDC__
  _RTLENTRYF
  #endif
  sort_compare __ARGS((const void *s1, const void *s2));
  
      static int
  #ifdef __BORLANDC__
  _RTLENTRYF
  #endif
  sort_compare(s1, s2)
      const void	*s1;
      const void	*s2;
  {
      sorti_T	l1 = *(sorti_T *)s1;
      sorti_T	l2 = *(sorti_T *)s2;
      int		result = 0;
  
      /* If the user interrupts, there's no way to stop qsort() immediately, but
       * if we return 0 every time, qsort will assume it's done sorting and
       * exit. */
      if (sort_abort)
  	return 0;
      fast_breakcheck();
      if (got_int)
  	sort_abort = TRUE;
  
      /* When sorting numbers "start_col_nr" is the number, not the column
       * number. */
      if (sort_nr)
  	result = l1.start_col_nr == l2.start_col_nr ? 0
  				 : l1.start_col_nr > l2.start_col_nr ? 1 : -1;
      else
      {
  	/* We need to copy one line into "sortbuf1", because there is no
  	 * guarantee that the first pointer becomes invalid when obtaining the
  	 * second one. */
  	STRNCPY(sortbuf1, ml_get(l1.lnum) + l1.start_col_nr,
  					 l1.end_col_nr - l1.start_col_nr + 1);
  	sortbuf1[l1.end_col_nr - l1.start_col_nr] = 0;
  	STRNCPY(sortbuf2, ml_get(l2.lnum) + l2.start_col_nr,
  					 l2.end_col_nr - l2.start_col_nr + 1);
  	sortbuf2[l2.end_col_nr - l2.start_col_nr] = 0;
  
  	result = sort_ic ? STRICMP(sortbuf1, sortbuf2)
  						 : STRCMP(sortbuf1, sortbuf2);
      }
  
      /* If two lines have the same value, preserve the original line order. */
      if (result == 0)
  	return (int)(l1.lnum - l2.lnum);
      return result;
  }
  
  /*
   * ":sort".
   */
      void
  ex_sort(eap)
      exarg_T	*eap;
  {
      regmatch_T	regmatch;
      int		len;
      linenr_T	lnum;
      long	maxlen = 0;
      sorti_T	*nrs;
      size_t	count = (size_t)(eap->line2 - eap->line1 + 1);
      size_t	i;
      char_u	*p;
      char_u	*s;
      char_u	*s2;
      char_u	c;			/* temporary character storage */
      int		unique = FALSE;
      long	deleted;
      colnr_T	start_col;
      colnr_T	end_col;
      int		sort_oct;		/* sort on octal number */
      int		sort_hex;		/* sort on hex number */
  
      /* Sorting one line is really quick! */
      if (count <= 1)
  	return;
  
      if (u_save((linenr_T)(eap->line1 - 1), (linenr_T)(eap->line2 + 1)) == FAIL)
  	return;
      sortbuf1 = NULL;
      sortbuf2 = NULL;
      regmatch.regprog = NULL;
      nrs = (sorti_T *)lalloc((long_u)(count * sizeof(sorti_T)), TRUE);
      if (nrs == NULL)
  	goto sortend;
  
      sort_abort = sort_ic = sort_rx = sort_nr = sort_oct = sort_hex = 0;
  
      for (p = eap->arg; *p != NUL; ++p)
      {
  	if (vim_iswhite(*p))
  	    ;
  	else if (*p == 'i')
  	    sort_ic = TRUE;
  	else if (*p == 'r')
  	    sort_rx = TRUE;
  	else if (*p == 'n')
  	    sort_nr = 2;
  	else if (*p == 'o')
  	    sort_oct = 2;
  	else if (*p == 'x')
  	    sort_hex = 2;
  	else if (*p == 'u')
  	    unique = TRUE;
  	else if (*p == '"')	/* comment start */
  	    break;
  	else if (check_nextcmd(p) != NULL)
  	{
  	    eap->nextcmd = check_nextcmd(p);
  	    break;
  	}
  	else if (!ASCII_ISALPHA(*p) && regmatch.regprog == NULL)
  	{
  	    s = skip_regexp(p + 1, *p, TRUE, NULL);
  	    if (*s != *p)
  	    {
  		EMSG(_(e_invalpat));
  		goto sortend;
  	    }
  	    *s = NUL;
  	    /* Use last search pattern if sort pattern is empty. */
  	    if (s == p + 1)
  	    {
  		if (last_search_pat() == NULL)
  		{
  		    EMSG(_(e_noprevre));
  		    goto sortend;
  		}
  		regmatch.regprog = vim_regcomp(last_search_pat(), RE_MAGIC);
  	    }
  	    else
  		regmatch.regprog = vim_regcomp(p + 1, RE_MAGIC);
  	    if (regmatch.regprog == NULL)
  		goto sortend;
  	    p = s;		/* continue after the regexp */
  	    regmatch.rm_ic = p_ic;
  	}
  	else
  	{
  	    EMSG2(_(e_invarg2), p);
  	    goto sortend;
  	}
      }
  
      /* Can only have one of 'n', 'o' and 'x'. */
      if (sort_nr + sort_oct + sort_hex > 2)
      {
  	EMSG(_(e_invarg));
  	goto sortend;
      }
  
      /* From here on "sort_nr" is used as a flag for any number sorting. */
      sort_nr += sort_oct + sort_hex;
  
      /*
       * Make an array with all line numbers.  This avoids having to copy all
       * the lines into allocated memory.
       * When sorting on strings "start_col_nr" is the offset in the line, for
       * numbers sorting it's the number to sort on.  This means the pattern
       * matching and number conversion only has to be done once per line.
       * Also get the longest line length for allocating "sortbuf".
       */
      for (lnum = eap->line1; lnum <= eap->line2; ++lnum)
      {
  	s = ml_get(lnum);
  	len = (int)STRLEN(s);
  	if (maxlen < len)
  	    maxlen = len;
  
  	start_col = 0;
  	end_col = len;
  	if (regmatch.regprog != NULL && vim_regexec(&regmatch, s, 0))
  	{
  	    if (sort_rx)
  	    {
  		start_col = (colnr_T)(regmatch.startp[0] - s);
  		end_col = (colnr_T)(regmatch.endp[0] - s);
  	    }
  	    else
  		start_col = (colnr_T)(regmatch.endp[0] - s);
  	}
  	else
  	    if (regmatch.regprog != NULL)
  		end_col = 0;
  
  	if (sort_nr)
  	{
  	    /* Make sure vim_str2nr doesn't read any digits past the end
  	     * of the match, by temporarily terminating the string there */
  	    s2 = s + end_col;
  	    c = *s2;
  	    *s2 = NUL;
  	    /* Sorting on number: Store the number itself. */
  	    p = s + start_col;
  	    if (sort_hex)
  		s = skiptohex(p);
  	    else
  		s = skiptodigit(p);
  	    if (s > p && s[-1] == '-')
  		--s;  /* include preceding negative sign */
  	    if (*s == NUL)
  		/* empty line should sort before any number */
  		nrs[lnum - eap->line1].start_col_nr = -MAXLNUM;
  	    else
  		vim_str2nr(s, NULL, NULL, sort_oct, sort_hex,
  				  &nrs[lnum - eap->line1].start_col_nr, NULL);
  	    *s2 = c;
  	}
  	else
  	{
  	    /* Store the column to sort at. */
  	    nrs[lnum - eap->line1].start_col_nr = start_col;
  	    nrs[lnum - eap->line1].end_col_nr = end_col;
  	}
  
  	nrs[lnum - eap->line1].lnum = lnum;
  
  	if (regmatch.regprog != NULL)
  	    fast_breakcheck();
  	if (got_int)
  	    goto sortend;
      }
  
      /* Allocate a buffer that can hold the longest line. */
      sortbuf1 = alloc((unsigned)maxlen + 1);
      if (sortbuf1 == NULL)
  	goto sortend;
      sortbuf2 = alloc((unsigned)maxlen + 1);
      if (sortbuf2 == NULL)
  	goto sortend;
  
      /* Sort the array of line numbers.  Note: can't be interrupted! */
      qsort((void *)nrs, count, sizeof(sorti_T), sort_compare);
  
      if (sort_abort)
  	goto sortend;
  
      /* Insert the lines in the sorted order below the last one. */
      lnum = eap->line2;
      for (i = 0; i < count; ++i)
      {
  	s = ml_get(nrs[eap->forceit ? count - i - 1 : i].lnum);
  	if (!unique || i == 0
  		|| (sort_ic ? STRICMP(s, sortbuf1) : STRCMP(s, sortbuf1)) != 0)
  	{
  	    if (ml_append(lnum++, s, (colnr_T)0, FALSE) == FAIL)
  		break;
  	    if (unique)
  		STRCPY(sortbuf1, s);
  	}
  	fast_breakcheck();
  	if (got_int)
  	    goto sortend;
      }
  
      /* delete the original lines if appending worked */
      if (i == count)
  	for (i = 0; i < count; ++i)
  	    ml_delete(eap->line1, FALSE);
      else
  	count = 0;
  
      /* Adjust marks for deleted (or added) lines and prepare for displaying. */
      deleted = (long)(count - (lnum - eap->line2));
      if (deleted > 0)
  	mark_adjust(eap->line2 - deleted, eap->line2, (long)MAXLNUM, -deleted);
      else if (deleted < 0)
  	mark_adjust(eap->line2, MAXLNUM, -deleted, 0L);
      changed_lines(eap->line1, 0, eap->line2 + 1, -deleted);
  
      curwin->w_cursor.lnum = eap->line1;
      beginline(BL_WHITE | BL_FIX);
  
  sortend:
      vim_free(nrs);
      vim_free(sortbuf1);
      vim_free(sortbuf2);
      vim_regfree(regmatch.regprog);
      if (got_int)
  	EMSG(_(e_interr));
  }
  
  /*
   * ":retab".
   */
      void
  ex_retab(eap)
      exarg_T	*eap;
  {
      linenr_T	lnum;
      int		got_tab = FALSE;
      long	num_spaces = 0;
      long	num_tabs;
      long	len;
      long	col;
      long	vcol;
      long	start_col = 0;		/* For start of white-space string */
      long	start_vcol = 0;		/* For start of white-space string */
      int		temp;
      long	old_len;
      char_u	*ptr;
      char_u	*new_line = (char_u *)1;    /* init to non-NULL */
      int		did_undo;		/* called u_save for current line */
      int		new_ts;
      int		save_list;
      linenr_T	first_line = 0;		/* first changed line */
      linenr_T	last_line = 0;		/* last changed line */
  
      save_list = curwin->w_p_list;
      curwin->w_p_list = 0;	    /* don't want list mode here */
  
      new_ts = getdigits(&(eap->arg));
      if (new_ts < 0)
      {
  	EMSG(_(e_positive));
  	return;
      }
      if (new_ts == 0)
  	new_ts = curbuf->b_p_ts;
      for (lnum = eap->line1; !got_int && lnum <= eap->line2; ++lnum)
      {
  	ptr = ml_get(lnum);
  	col = 0;
  	vcol = 0;
  	did_undo = FALSE;
  	for (;;)
  	{
  	    if (vim_iswhite(ptr[col]))
  	    {
  		if (!got_tab && num_spaces == 0)
  		{
  		    /* First consecutive white-space */
  		    start_vcol = vcol;
  		    start_col = col;
  		}
  		if (ptr[col] == ' ')
  		    num_spaces++;
  		else
  		    got_tab = TRUE;
  	    }
  	    else
  	    {
  		if (got_tab || (eap->forceit && num_spaces > 1))
  		{
  		    /* Retabulate this string of white-space */
  
  		    /* len is virtual length of white string */
  		    len = num_spaces = vcol - start_vcol;
  		    num_tabs = 0;
  		    if (!curbuf->b_p_et)
  		    {
  			temp = new_ts - (start_vcol % new_ts);
  			if (num_spaces >= temp)
  			{
  			    num_spaces -= temp;
  			    num_tabs++;
  			}
  			num_tabs += num_spaces / new_ts;
  			num_spaces -= (num_spaces / new_ts) * new_ts;
  		    }
  		    if (curbuf->b_p_et || got_tab ||
  					(num_spaces + num_tabs < len))
  		    {
  			if (did_undo == FALSE)
  			{
  			    did_undo = TRUE;
  			    if (u_save((linenr_T)(lnum - 1),
  						(linenr_T)(lnum + 1)) == FAIL)
  			    {
  				new_line = NULL;	/* flag out-of-memory */
  				break;
  			    }
  			}
  
  			/* len is actual number of white characters used */
  			len = num_spaces + num_tabs;
  			old_len = (long)STRLEN(ptr);
  			new_line = lalloc(old_len - col + start_col + len + 1,
  									TRUE);
  			if (new_line == NULL)
  			    break;
  			if (start_col > 0)
  			    mch_memmove(new_line, ptr, (size_t)start_col);
  			mch_memmove(new_line + start_col + len,
  				      ptr + col, (size_t)(old_len - col + 1));
  			ptr = new_line + start_col;
  			for (col = 0; col < len; col++)
  			    ptr[col] = (col < num_tabs) ? '\t' : ' ';
  			ml_replace(lnum, new_line, FALSE);
  			if (first_line == 0)
  			    first_line = lnum;
  			last_line = lnum;
  			ptr = new_line;
  			col = start_col + len;
  		    }
  		}
  		got_tab = FALSE;
  		num_spaces = 0;
  	    }
  	    if (ptr[col] == NUL)
  		break;
  	    vcol += chartabsize(ptr + col, (colnr_T)vcol);
  #ifdef FEAT_MBYTE
  	    if (has_mbyte)
  		col += (*mb_ptr2len)(ptr + col);
  	    else
  #endif
  		++col;
  	}
  	if (new_line == NULL)		    /* out of memory */
  	    break;
  	line_breakcheck();
      }
      if (got_int)
  	EMSG(_(e_interr));
  
      if (curbuf->b_p_ts != new_ts)
  	redraw_curbuf_later(NOT_VALID);
      if (first_line != 0)
  	changed_lines(first_line, 0, last_line + 1, 0L);
  
      curwin->w_p_list = save_list;	/* restore 'list' */
  
      curbuf->b_p_ts = new_ts;
      coladvance(curwin->w_curswant);
  
      u_clearline();
  }
  #endif
  
  /*
   * :move command - move lines line1-line2 to line dest
   *
   * return FAIL for failure, OK otherwise
   */
      int
  do_move(line1, line2, dest)
      linenr_T	line1;
      linenr_T	line2;
      linenr_T	dest;
  {
      char_u	*str;
      linenr_T	l;
      linenr_T	extra;	    /* Num lines added before line1 */
      linenr_T	num_lines;  /* Num lines moved */
      linenr_T	last_line;  /* Last line in file after adding new text */
  
      if (dest >= line1 && dest < line2)
      {
  	EMSG(_("E134: Move lines into themselves"));
  	return FAIL;
      }
  
      num_lines = line2 - line1 + 1;
  
      /*
       * First we copy the old text to its new location -- webb
       * Also copy the flag that ":global" command uses.
       */
      if (u_save(dest, dest + 1) == FAIL)
  	return FAIL;
      for (extra = 0, l = line1; l <= line2; l++)
      {
  	str = vim_strsave(ml_get(l + extra));
  	if (str != NULL)
  	{
  	    ml_append(dest + l - line1, str, (colnr_T)0, FALSE);
  	    vim_free(str);
  	    if (dest < line1)
  		extra++;
  	}
      }
  
      /*
       * Now we must be careful adjusting our marks so that we don't overlap our
       * mark_adjust() calls.
       *
       * We adjust the marks within the old text so that they refer to the
       * last lines of the file (temporarily), because we know no other marks
       * will be set there since these line numbers did not exist until we added
       * our new lines.
       *
       * Then we adjust the marks on lines between the old and new text positions
       * (either forwards or backwards).
       *
       * And Finally we adjust the marks we put at the end of the file back to
       * their final destination at the new text position -- webb
       */
      last_line = curbuf->b_ml.ml_line_count;
      mark_adjust(line1, line2, last_line - line2, 0L);
      changed_lines(last_line - num_lines + 1, 0, last_line + 1, num_lines);
      if (dest >= line2)
      {
  	mark_adjust(line2 + 1, dest, -num_lines, 0L);
  	curbuf->b_op_start.lnum = dest - num_lines + 1;
  	curbuf->b_op_end.lnum = dest;
      }
      else
      {
  	mark_adjust(dest + 1, line1 - 1, num_lines, 0L);
  	curbuf->b_op_start.lnum = dest + 1;
  	curbuf->b_op_end.lnum = dest + num_lines;
      }
      curbuf->b_op_start.col = curbuf->b_op_end.col = 0;
      mark_adjust(last_line - num_lines + 1, last_line,
  					     -(last_line - dest - extra), 0L);
      changed_lines(last_line - num_lines + 1, 0, last_line + 1, -extra);
  
      /*
       * Now we delete the original text -- webb
       */
      if (u_save(line1 + extra - 1, line2 + extra + 1) == FAIL)
  	return FAIL;
  
      for (l = line1; l <= line2; l++)
  	ml_delete(line1 + extra, TRUE);
  
      if (!global_busy && num_lines > p_report)
      {
  	if (num_lines == 1)
  	    MSG(_("1 line moved"));
  	else
  	    smsg((char_u *)_("%ld lines moved"), num_lines);
      }
  
      /*
       * Leave the cursor on the last of the moved lines.
       */
      if (dest >= line1)
  	curwin->w_cursor.lnum = dest;
      else
  	curwin->w_cursor.lnum = dest + (line2 - line1) + 1;
  
      if (line1 < dest)
      {
  	dest += num_lines + 1;
  	last_line = curbuf->b_ml.ml_line_count;
  	if (dest > last_line + 1)
  	    dest = last_line + 1;
  	changed_lines(line1, 0, dest, 0L);
      }
      else
  	changed_lines(dest + 1, 0, line1 + num_lines, 0L);
  
      return OK;
  }
  
  /*
   * ":copy"
   */
      void
  ex_copy(line1, line2, n)
      linenr_T	line1;
      linenr_T	line2;
      linenr_T	n;
  {
      linenr_T	count;
      char_u	*p;
  
      count = line2 - line1 + 1;
      curbuf->b_op_start.lnum = n + 1;
      curbuf->b_op_end.lnum = n + count;
      curbuf->b_op_start.col = curbuf->b_op_end.col = 0;
  
      /*
       * there are three situations:
       * 1. destination is above line1
       * 2. destination is between line1 and line2
       * 3. destination is below line2
       *
       * n = destination (when starting)
       * curwin->w_cursor.lnum = destination (while copying)
       * line1 = start of source (while copying)
       * line2 = end of source (while copying)
       */
      if (u_save(n, n + 1) == FAIL)
  	return;
  
      curwin->w_cursor.lnum = n;
      while (line1 <= line2)
      {
  	/* need to use vim_strsave() because the line will be unlocked within
  	 * ml_append() */
  	p = vim_strsave(ml_get(line1));
  	if (p != NULL)
  	{
  	    ml_append(curwin->w_cursor.lnum, p, (colnr_T)0, FALSE);
  	    vim_free(p);
  	}
  	/* situation 2: skip already copied lines */
  	if (line1 == n)
  	    line1 = curwin->w_cursor.lnum;
  	++line1;
  	if (curwin->w_cursor.lnum < line1)
  	    ++line1;
  	if (curwin->w_cursor.lnum < line2)
  	    ++line2;
  	++curwin->w_cursor.lnum;
      }
  
      appended_lines_mark(n, count);
  
      msgmore((long)count);
  }
  
  static char_u	*prevcmd = NULL;	/* the previous command */
  
  #if defined(EXITFREE) || defined(PROTO)
      void
  free_prev_shellcmd()
  {
      vim_free(prevcmd);
  }
  #endif
  
  /*
   * Handle the ":!cmd" command.	Also for ":r !cmd" and ":w !cmd"
   * Bangs in the argument are replaced with the previously entered command.
   * Remember the argument.
   */
      void
  do_bang(addr_count, eap, forceit, do_in, do_out)
      int		addr_count;
      exarg_T	*eap;
      int		forceit;
      int		do_in, do_out;
  {
      char_u		*arg = eap->arg;	/* command */
      linenr_T		line1 = eap->line1;	/* start of range */
      linenr_T		line2 = eap->line2;	/* end of range */
      char_u		*newcmd = NULL;		/* the new command */
      int			free_newcmd = FALSE;    /* need to free() newcmd */
      int			ins_prevcmd;
      char_u		*t;
      char_u		*p;
      char_u		*trailarg;
      int			len;
      int			scroll_save = msg_scroll;
  
      /*
       * Disallow shell commands for "rvim".
       * Disallow shell commands from .exrc and .vimrc in current directory for
       * security reasons.
       */
      if (check_restricted() || check_secure())
  	return;
  
      if (addr_count == 0)		/* :! */
      {
  	msg_scroll = FALSE;	    /* don't scroll here */
  	autowrite_all();
  	msg_scroll = scroll_save;
      }
  
      /*
       * Try to find an embedded bang, like in :!<cmd> ! [args]
       * (:!! is indicated by the 'forceit' variable)
       */
      ins_prevcmd = forceit;
      trailarg = arg;
      do
      {
  	len = (int)STRLEN(trailarg) + 1;
  	if (newcmd != NULL)
  	    len += (int)STRLEN(newcmd);
  	if (ins_prevcmd)
  	{
  	    if (prevcmd == NULL)
  	    {
  		EMSG(_(e_noprev));
  		vim_free(newcmd);
  		return;
  	    }
  	    len += (int)STRLEN(prevcmd);
  	}
  	if ((t = alloc((unsigned)len)) == NULL)
  	{
  	    vim_free(newcmd);
  	    return;
  	}
  	*t = NUL;
  	if (newcmd != NULL)
  	    STRCAT(t, newcmd);
  	if (ins_prevcmd)
  	    STRCAT(t, prevcmd);
  	p = t + STRLEN(t);
  	STRCAT(t, trailarg);
  	vim_free(newcmd);
  	newcmd = t;
  
  	/*
  	 * Scan the rest of the argument for '!', which is replaced by the
  	 * previous command.  "\!" is replaced by "!" (this is vi compatible).
  	 */
  	trailarg = NULL;
  	while (*p)
  	{
  	    if (*p == '!')
  	    {
  		if (p > newcmd && p[-1] == '\\')
  		    STRMOVE(p - 1, p);
  		else
  		{
  		    trailarg = p;
  		    *trailarg++ = NUL;
  		    ins_prevcmd = TRUE;
  		    break;
  		}
  	    }
  	    ++p;
  	}
      } while (trailarg != NULL);
  
      vim_free(prevcmd);
      prevcmd = newcmd;
  
      if (bangredo)	    /* put cmd in redo buffer for ! command */
      {
  	AppendToRedobuffLit(prevcmd, -1);
  	AppendToRedobuff((char_u *)"\n");
  	bangredo = FALSE;
      }
      /*
       * Add quotes around the command, for shells that need them.
       */
      if (*p_shq != NUL)
      {
  	newcmd = alloc((unsigned)(STRLEN(prevcmd) + 2 * STRLEN(p_shq) + 1));
  	if (newcmd == NULL)
  	    return;
  	STRCPY(newcmd, p_shq);
  	STRCAT(newcmd, prevcmd);
  	STRCAT(newcmd, p_shq);
  	free_newcmd = TRUE;
      }
      if (addr_count == 0)		/* :! */
      {
  	/* echo the command */
  	msg_start();
  	msg_putchar(':');
  	msg_putchar('!');
  	msg_outtrans(newcmd);
  	msg_clr_eos();
  	windgoto(msg_row, msg_col);
  
  	do_shell(newcmd, 0);
      }
      else				/* :range! */
      {
  	/* Careful: This may recursively call do_bang() again! (because of
  	 * autocommands) */
  	do_filter(line1, line2, eap, newcmd, do_in, do_out);
  #ifdef FEAT_AUTOCMD
  	apply_autocmds(EVENT_SHELLFILTERPOST, NULL, NULL, FALSE, curbuf);
  #endif
      }
      if (free_newcmd)
  	vim_free(newcmd);
  }
  
  /*
   * do_filter: filter lines through a command given by the user
   *
   * We mostly use temp files and the call_shell() routine here. This would
   * normally be done using pipes on a UNIX machine, but this is more portable
   * to non-unix machines. The call_shell() routine needs to be able
   * to deal with redirection somehow, and should handle things like looking
   * at the PATH env. variable, and adding reasonable extensions to the
   * command name given by the user. All reasonable versions of call_shell()
   * do this.
   * Alternatively, if on Unix and redirecting input or output, but not both,
   * and the 'shelltemp' option isn't set, use pipes.
   * We use input redirection if do_in is TRUE.
   * We use output redirection if do_out is TRUE.
   */
      static void
  do_filter(line1, line2, eap, cmd, do_in, do_out)
      linenr_T	line1, line2;
      exarg_T	*eap;		/* for forced 'ff' and 'fenc' */
      char_u	*cmd;
      int		do_in, do_out;
  {
      char_u	*itmp = NULL;
      char_u	*otmp = NULL;
      linenr_T	linecount;
      linenr_T	read_linecount;
      pos_T	cursor_save;
      char_u	*cmd_buf;
  #ifdef FEAT_AUTOCMD
      buf_T	*old_curbuf = curbuf;
  #endif
      int		shell_flags = 0;
  
      if (*cmd == NUL)	    /* no filter command */
  	return;
  
  #ifdef WIN3264
      /*
       * Check if external commands are allowed now.
       */
      if (can_end_termcap_mode(TRUE) == FALSE)
  	return;
  #endif
  
      cursor_save = curwin->w_cursor;
      linecount = line2 - line1 + 1;
      curwin->w_cursor.lnum = line1;
      curwin->w_cursor.col = 0;
      changed_line_abv_curs();
      invalidate_botline();
  
      /*
       * When using temp files:
       * 1. * Form temp file names
       * 2. * Write the lines to a temp file
       * 3.   Run the filter command on the temp file
       * 4. * Read the output of the command into the buffer
       * 5. * Delete the original lines to be filtered
       * 6. * Remove the temp files
       *
       * When writing the input with a pipe or when catching the output with a
       * pipe only need to do 3.
       */
  
      if (do_out)
  	shell_flags |= SHELL_DOOUT;
  
  #ifdef FEAT_FILTERPIPE
      if (!do_in && do_out && !p_stmp)
      {
  	/* Use a pipe to fetch stdout of the command, do not use a temp file. */
  	shell_flags |= SHELL_READ;
  	curwin->w_cursor.lnum = line2;
      }
      else if (do_in && !do_out && !p_stmp)
      {
  	/* Use a pipe to write stdin of the command, do not use a temp file. */
  	shell_flags |= SHELL_WRITE;
  	curbuf->b_op_start.lnum = line1;
  	curbuf->b_op_end.lnum = line2;
      }
      else if (do_in && do_out && !p_stmp)
      {
  	/* Use a pipe to write stdin and fetch stdout of the command, do not
  	 * use a temp file. */
  	shell_flags |= SHELL_READ|SHELL_WRITE;
  	curbuf->b_op_start.lnum = line1;
  	curbuf->b_op_end.lnum = line2;
  	curwin->w_cursor.lnum = line2;
      }
      else
  #endif
  	if ((do_in && (itmp = vim_tempname('i')) == NULL)
  		|| (do_out && (otmp = vim_tempname('o')) == NULL))
  	{
  	    EMSG(_(e_notmp));
  	    goto filterend;
  	}
  
  /*
   * The writing and reading of temp files will not be shown.
   * Vi also doesn't do this and the messages are not very informative.
   */
      ++no_wait_return;		/* don't call wait_return() while busy */
      if (itmp != NULL && buf_write(curbuf, itmp, NULL, line1, line2, eap,
  					   FALSE, FALSE, FALSE, TRUE) == FAIL)
      {
  	msg_putchar('\n');		/* keep message from buf_write() */
  	--no_wait_return;
  #if defined(FEAT_AUTOCMD) && defined(FEAT_EVAL)
  	if (!aborting())
  #endif
  	    (void)EMSG2(_(e_notcreate), itmp);	/* will call wait_return */
  	goto filterend;
      }
  #ifdef FEAT_AUTOCMD
      if (curbuf != old_curbuf)
  	goto filterend;
  #endif
  
      if (!do_out)
  	msg_putchar('\n');
  
      /* Create the shell command in allocated memory. */
      cmd_buf = make_filter_cmd(cmd, itmp, otmp);
      if (cmd_buf == NULL)
  	goto filterend;
  
      windgoto((int)Rows - 1, 0);
      cursor_on();
  
      /*
       * When not redirecting the output the command can write anything to the
       * screen. If 'shellredir' is equal to ">", screen may be messed up by
       * stderr output of external command. Clear the screen later.
       * If do_in is FALSE, this could be something like ":r !cat", which may
       * also mess up the screen, clear it later.
       */
      if (!do_out || STRCMP(p_srr, ">") == 0 || !do_in)
  	redraw_later_clear();
  
      if (do_out)
      {
  	if (u_save((linenr_T)(line2), (linenr_T)(line2 + 1)) == FAIL)
  	{
  	    vim_free(cmd_buf);
  	    goto error;
  	}
  	redraw_curbuf_later(VALID);
      }
      read_linecount = curbuf->b_ml.ml_line_count;
  
      /*
       * When call_shell() fails wait_return() is called to give the user a
       * chance to read the error messages. Otherwise errors are ignored, so you
       * can see the error messages from the command that appear on stdout; use
       * 'u' to fix the text
       * Switch to cooked mode when not redirecting stdin, avoids that something
       * like ":r !cat" hangs.
       * Pass on the SHELL_DOOUT flag when the output is being redirected.
       */
      if (call_shell(cmd_buf, SHELL_FILTER | SHELL_COOKED | shell_flags))
      {
  	redraw_later_clear();
  	wait_return(FALSE);
      }
      vim_free(cmd_buf);
  
      did_check_timestamps = FALSE;
      need_check_timestamps = TRUE;
  
      /* When interrupting the shell command, it may still have produced some
       * useful output.  Reset got_int here, so that readfile() won't cancel
       * reading. */
      ui_breakcheck();
      got_int = FALSE;
  
      if (do_out)
      {
  	if (otmp != NULL)
  	{
  	    if (readfile(otmp, NULL, line2, (linenr_T)0, (linenr_T)MAXLNUM,
  						    eap, READ_FILTER) == FAIL)
  	    {
  #if defined(FEAT_AUTOCMD) && defined(FEAT_EVAL)
  		if (!aborting())
  #endif
  		{
  		    msg_putchar('\n');
  		    EMSG2(_(e_notread), otmp);
  		}
  		goto error;
  	    }
  #ifdef FEAT_AUTOCMD
  	    if (curbuf != old_curbuf)
  		goto filterend;
  #endif
  	}
  
  	read_linecount = curbuf->b_ml.ml_line_count - read_linecount;
  
  	if (shell_flags & SHELL_READ)
  	{
  	    curbuf->b_op_start.lnum = line2 + 1;
  	    curbuf->b_op_end.lnum = curwin->w_cursor.lnum;
  	    appended_lines_mark(line2, read_linecount);
  	}
  
  	if (do_in)
  	{
  	    if (cmdmod.keepmarks || vim_strchr(p_cpo, CPO_REMMARK) == NULL)
  	    {
  		if (read_linecount >= linecount)
  		    /* move all marks from old lines to new lines */
  		    mark_adjust(line1, line2, linecount, 0L);
  		else
  		{
  		    /* move marks from old lines to new lines, delete marks
  		     * that are in deleted lines */
  		    mark_adjust(line1, line1 + read_linecount - 1,
  								linecount, 0L);
  		    mark_adjust(line1 + read_linecount, line2, MAXLNUM, 0L);
  		}
  	    }
  
  	    /*
  	     * Put cursor on first filtered line for ":range!cmd".
  	     * Adjust '[ and '] (set by buf_write()).
  	     */
  	    curwin->w_cursor.lnum = line1;
  	    del_lines(linecount, TRUE);
  	    curbuf->b_op_start.lnum -= linecount;	/* adjust '[ */
  	    curbuf->b_op_end.lnum -= linecount;		/* adjust '] */
  	    write_lnum_adjust(-linecount);		/* adjust last line
  							   for next write */
  #ifdef FEAT_FOLDING
  	    foldUpdate(curwin, curbuf->b_op_start.lnum, curbuf->b_op_end.lnum);
  #endif
  	}
  	else
  	{
  	    /*
  	     * Put cursor on last new line for ":r !cmd".
  	     */
  	    linecount = curbuf->b_op_end.lnum - curbuf->b_op_start.lnum + 1;
  	    curwin->w_cursor.lnum = curbuf->b_op_end.lnum;
  	}
  
  	beginline(BL_WHITE | BL_FIX);	    /* cursor on first non-blank */
  	--no_wait_return;
  
  	if (linecount > p_report)
  	{
  	    if (do_in)
  	    {
  		vim_snprintf((char *)msg_buf, sizeof(msg_buf),
  				    _("%ld lines filtered"), (long)linecount);
  		if (msg(msg_buf) && !msg_scroll)
  		    /* save message to display it after redraw */
  		    set_keep_msg(msg_buf, 0);
  	    }
  	    else
  		msgmore((long)linecount);
  	}
      }
      else
      {
  error:
  	/* put cursor back in same position for ":w !cmd" */
  	curwin->w_cursor = cursor_save;
  	--no_wait_return;
  	wait_return(FALSE);
      }
  
  filterend:
  
  #ifdef FEAT_AUTOCMD
      if (curbuf != old_curbuf)
      {
  	--no_wait_return;
  	EMSG(_("E135: *Filter* Autocommands must not change current buffer"));
      }
  #endif
      if (itmp != NULL)
  	mch_remove(itmp);
      if (otmp != NULL)
  	mch_remove(otmp);
      vim_free(itmp);
      vim_free(otmp);
  }
  
  /*
   * Call a shell to execute a command.
   * When "cmd" is NULL start an interactive shell.
   */
      void
  do_shell(cmd, flags)
      char_u	*cmd;
      int		flags;	/* may be SHELL_DOOUT when output is redirected */
  {
      buf_T	*buf;
  #ifndef FEAT_GUI_MSWIN
      int		save_nwr;
  #endif
  #ifdef MSWIN
      int		winstart = FALSE;
  #endif
  
      /*
       * Disallow shell commands for "rvim".
       * Disallow shell commands from .exrc and .vimrc in current directory for
       * security reasons.
       */
      if (check_restricted() || check_secure())
      {
  	msg_end();
  	return;
      }
  
  #ifdef MSWIN
      /*
       * Check if external commands are allowed now.
       */
      if (can_end_termcap_mode(TRUE) == FALSE)
  	return;
  
      /*
       * Check if ":!start" is used.
       */
      if (cmd != NULL)
  	winstart = (STRNICMP(cmd, "start ", 6) == 0);
  #endif
  
      /*
       * For autocommands we want to get the output on the current screen, to
       * avoid having to type return below.
       */
      msg_putchar('\r');			/* put cursor at start of line */
  #ifdef FEAT_AUTOCMD
      if (!autocmd_busy)
  #endif
      {
  #ifdef MSWIN
  	if (!winstart)
  #endif
  	    stoptermcap();
      }
  #ifdef MSWIN
      if (!winstart)
  #endif
  	msg_putchar('\n');		/* may shift screen one line up */
  
      /* warning message before calling the shell */
      if (p_warn
  #ifdef FEAT_AUTOCMD
  		&& !autocmd_busy
  #endif
  		&& msg_silent == 0)
  	for (buf = firstbuf; buf; buf = buf->b_next)
  	    if (bufIsChanged(buf))
  	    {
  #ifdef FEAT_GUI_MSWIN
  		if (!winstart)
  		    starttermcap();	/* don't want a message box here */
  #endif
  		MSG_PUTS(_("[No write since last change]\n"));
  #ifdef FEAT_GUI_MSWIN
  		if (!winstart)
  		    stoptermcap();
  #endif
  		break;
  	    }
  
      /* This windgoto is required for when the '\n' resulted in a "delete line
       * 1" command to the terminal. */
      if (!swapping_screen())
  	windgoto(msg_row, msg_col);
      cursor_on();
      (void)call_shell(cmd, SHELL_COOKED | flags);
      did_check_timestamps = FALSE;
      need_check_timestamps = TRUE;
  
      /*
       * put the message cursor at the end of the screen, avoids wait_return()
       * to overwrite the text that the external command showed
       */
      if (!swapping_screen())
      {
  	msg_row = Rows - 1;
  	msg_col = 0;
      }
  
  #ifdef FEAT_AUTOCMD
      if (autocmd_busy)
      {
  	if (msg_silent == 0)
  	    redraw_later_clear();
      }
      else
  #endif
      {
  	/*
  	 * For ":sh" there is no need to call wait_return(), just redraw.
  	 * Also for the Win32 GUI (the output is in a console window).
  	 * Otherwise there is probably text on the screen that the user wants
  	 * to read before redrawing, so call wait_return().
  	 */
  #ifndef FEAT_GUI_MSWIN
  	if (cmd == NULL
  # ifdef WIN3264
  		|| (winstart && !need_wait_return)
  # endif
  	   )
  	{
  	    if (msg_silent == 0)
  		redraw_later_clear();
  	    need_wait_return = FALSE;
  	}
  	else
  	{
  	    /*
  	     * If we switch screens when starttermcap() is called, we really
  	     * want to wait for "hit return to continue".
  	     */
  	    save_nwr = no_wait_return;
  	    if (swapping_screen())
  		no_wait_return = FALSE;
  # ifdef AMIGA
  	    wait_return(term_console ? -1 : msg_silent == 0);	/* see below */
  # else
  	    wait_return(msg_silent == 0);
  # endif
  	    no_wait_return = save_nwr;
  	}
  #endif /* FEAT_GUI_W32 */
  
  #ifdef MSWIN
  	if (!winstart) /* if winstart==TRUE, never stopped termcap! */
  #endif
  	    starttermcap();	/* start termcap if not done by wait_return() */
  
  	/*
  	 * In an Amiga window redrawing is caused by asking the window size.
  	 * If we got an interrupt this will not work. The chance that the
  	 * window size is wrong is very small, but we need to redraw the
  	 * screen.  Don't do this if ':' hit in wait_return().	THIS IS UGLY
  	 * but it saves an extra redraw.
  	 */
  #ifdef AMIGA
  	if (skip_redraw)		/* ':' hit in wait_return() */
  	{
  	    if (msg_silent == 0)
  		redraw_later_clear();
  	}
  	else if (term_console)
  	{
  	    OUT_STR(IF_EB("\033[0 q", ESC_STR "[0 q"));	/* get window size */
  	    if (got_int && msg_silent == 0)
  		redraw_later_clear();	/* if got_int is TRUE, redraw needed */
  	    else
  		must_redraw = 0;	/* no extra redraw needed */
  	}
  #endif
      }
  
      /* display any error messages now */
      display_errors();
  
  #ifdef FEAT_AUTOCMD
      apply_autocmds(EVENT_SHELLCMDPOST, NULL, NULL, FALSE, curbuf);
  #endif
  }
  
  /*
   * Create a shell command from a command string, input redirection file and
   * output redirection file.
   * Returns an allocated string with the shell command, or NULL for failure.
   */
      char_u *
  make_filter_cmd(cmd, itmp, otmp)
      char_u	*cmd;		/* command */
      char_u	*itmp;		/* NULL or name of input file */
      char_u	*otmp;		/* NULL or name of output file */
  {
      char_u	*buf;
      long_u	len;
  
      len = (long_u)STRLEN(cmd) + 3;			/* "()" + NUL */
      if (itmp != NULL)
  	len += (long_u)STRLEN(itmp) + 9;		/* " { < " + " } " */
      if (otmp != NULL)
  	len += (long_u)STRLEN(otmp) + (long_u)STRLEN(p_srr) + 2; /* "  " */
      buf = lalloc(len, TRUE);
      if (buf == NULL)
  	return NULL;
  
  #if (defined(UNIX) && !defined(ARCHIE)) || defined(OS2)
      /*
       * Put braces around the command (for concatenated commands) when
       * redirecting input and/or output.
       */
      if (itmp != NULL || otmp != NULL)
  	vim_snprintf((char *)buf, len, "(%s)", (char *)cmd);
      else
  	STRCPY(buf, cmd);
      if (itmp != NULL)
      {
  	STRCAT(buf, " < ");
  	STRCAT(buf, itmp);
      }
  #else
      /*
       * for shells that don't understand braces around commands, at least allow
       * the use of commands in a pipe.
       */
      STRCPY(buf, cmd);
      if (itmp != NULL)
      {
  	char_u	*p;
  
  	/*
  	 * If there is a pipe, we have to put the '<' in front of it.
  	 * Don't do this when 'shellquote' is not empty, otherwise the
  	 * redirection would be inside the quotes.
  	 */
  	if (*p_shq == NUL)
  	{
  	    p = vim_strchr(buf, '|');
  	    if (p != NULL)
  		*p = NUL;
  	}
  	STRCAT(buf, " <");	/* " < " causes problems on Amiga */
  	STRCAT(buf, itmp);
  	if (*p_shq == NUL)
  	{
  	    p = vim_strchr(cmd, '|');
  	    if (p != NULL)
  	    {
  		STRCAT(buf, " ");   /* insert a space before the '|' for DOS */
  		STRCAT(buf, p);
  	    }
  	}
      }
  #endif
      if (otmp != NULL)
  	append_redir(buf, (int)len, p_srr, otmp);
  
      return buf;
  }
  
  /*
   * Append output redirection for file "fname" to the end of string buffer
   * "buf[buflen]"
   * Works with the 'shellredir' and 'shellpipe' options.
   * The caller should make sure that there is enough room:
   *	STRLEN(opt) + STRLEN(fname) + 3
   */
      void
  append_redir(buf, buflen, opt, fname)
      char_u	*buf;
      int		buflen;
      char_u	*opt;
      char_u	*fname;
  {
      char_u	*p;
      char_u	*end;
  
      end = buf + STRLEN(buf);
      /* find "%s" */
      for (p = opt; (p = vim_strchr(p, '%')) != NULL; ++p)
      {
  	if (p[1] == 's') /* found %s */
  	    break;
  	if (p[1] == '%') /* skip %% */
  	    ++p;
      }
      if (p != NULL)
      {
  	*end = ' '; /* not really needed? Not with sh, ksh or bash */
  	vim_snprintf((char *)end + 1, (size_t)(buflen - (end + 1 - buf)),
  						  (char *)opt, (char *)fname);
      }
      else
  	vim_snprintf((char *)end, (size_t)(buflen - (end - buf)),
  #ifdef FEAT_QUICKFIX
  		" %s %s",
  #else
  		" %s%s",	/* " > %s" causes problems on Amiga */
  #endif
  		(char *)opt, (char *)fname);
  }
  
  #ifdef FEAT_VIMINFO
  
  static int no_viminfo __ARGS((void));
  static int  viminfo_errcnt;
  
      static int
  no_viminfo()
  {
      /* "vim -i NONE" does not read or write a viminfo file */
      return (use_viminfo != NULL && STRCMP(use_viminfo, "NONE") == 0);
  }
  
  /*
   * Report an error for reading a viminfo file.
   * Count the number of errors.	When there are more than 10, return TRUE.
   */
      int
  viminfo_error(errnum, message, line)
      char    *errnum;
      char    *message;
      char_u  *line;
  {
      vim_snprintf((char *)IObuff, IOSIZE, _("%sviminfo: %s in line: "),
  							     errnum, message);
      STRNCAT(IObuff, line, IOSIZE - STRLEN(IObuff) - 1);
      if (IObuff[STRLEN(IObuff) - 1] == '\n')
  	IObuff[STRLEN(IObuff) - 1] = NUL;
      emsg(IObuff);
      if (++viminfo_errcnt >= 10)
      {
  	EMSG(_("E136: viminfo: Too many errors, skipping rest of file"));
  	return TRUE;
      }
      return FALSE;
  }
  
  /*
   * read_viminfo() -- Read the viminfo file.  Registers etc. which are already
   * set are not over-written unless "flags" includes VIF_FORCEIT. -- webb
   */
      int
  read_viminfo(file, flags)
      char_u	*file;	    /* file name or NULL to use default name */
      int		flags;	    /* VIF_WANT_INFO et al. */
  {
      FILE	*fp;
      char_u	*fname;
  
      if (no_viminfo())
  	return FAIL;
  
      fname = viminfo_filename(file);	/* get file name in allocated buffer */
      if (fname == NULL)
  	return FAIL;
      fp = mch_fopen((char *)fname, READBIN);
  
      if (p_verbose > 0)
      {
  	verbose_enter();
  	smsg((char_u *)_("Reading viminfo file \"%s\"%s%s%s"),
  		fname,
  		(flags & VIF_WANT_INFO) ? _(" info") : "",
  		(flags & VIF_WANT_MARKS) ? _(" marks") : "",
  		(flags & VIF_GET_OLDFILES) ? _(" oldfiles") : "",
  		fp == NULL ? _(" FAILED") : "");
  	verbose_leave();
      }
  
      vim_free(fname);
      if (fp == NULL)
  	return FAIL;
  
      viminfo_errcnt = 0;
      do_viminfo(fp, NULL, flags);
  
      fclose(fp);
      return OK;
  }
  
  /*
   * Write the viminfo file.  The old one is read in first so that effectively a
   * merge of current info and old info is done.  This allows multiple vims to
   * run simultaneously, without losing any marks etc.
   * If "forceit" is TRUE, then the old file is not read in, and only internal
   * info is written to the file.
   */
      void
  write_viminfo(file, forceit)
      char_u	*file;
      int		forceit;
  {
      char_u	*fname;
      FILE	*fp_in = NULL;	/* input viminfo file, if any */
      FILE	*fp_out = NULL;	/* output viminfo file */
      char_u	*tempname = NULL;	/* name of temp viminfo file */
      struct stat	st_new;		/* mch_stat() of potential new file */
      char_u	*wp;
  #if defined(UNIX) || defined(VMS)
      mode_t	umask_save;
  #endif
  #ifdef UNIX
      int		shortname = FALSE;	/* use 8.3 file name */
      struct stat	st_old;		/* mch_stat() of existing viminfo file */
  #endif
  #ifdef WIN3264
      long	perm = -1;
  #endif
  
      if (no_viminfo())
  	return;
  
      fname = viminfo_filename(file);	/* may set to default if NULL */
      if (fname == NULL)
  	return;
  
      fp_in = mch_fopen((char *)fname, READBIN);
      if (fp_in == NULL)
      {
  	/* if it does exist, but we can't read it, don't try writing */
  	if (mch_stat((char *)fname, &st_new) == 0)
  	    goto end;
  #if defined(UNIX) || defined(VMS)
  	/*
  	 * For Unix we create the .viminfo non-accessible for others,
  	 * because it may contain text from non-accessible documents.
  	 */
  	umask_save = umask(077);
  #endif
  	fp_out = mch_fopen((char *)fname, WRITEBIN);
  #if defined(UNIX) || defined(VMS)
  	(void)umask(umask_save);
  #endif
      }
      else
      {
  	/*
  	 * There is an existing viminfo file.  Create a temporary file to
  	 * write the new viminfo into, in the same directory as the
  	 * existing viminfo file, which will be renamed later.
  	 */
  #ifdef UNIX
  	/*
  	 * For Unix we check the owner of the file.  It's not very nice to
  	 * overwrite a user's viminfo file after a "su root", with a
  	 * viminfo file that the user can't read.
  	 */
  	st_old.st_dev = (dev_t)0;
  	st_old.st_ino = 0;
  	st_old.st_mode = 0600;
  	if (mch_stat((char *)fname, &st_old) == 0
  		&& getuid() != ROOT_UID
  		&& !(st_old.st_uid == getuid()
  			? (st_old.st_mode & 0200)
  			: (st_old.st_gid == getgid()
  				? (st_old.st_mode & 0020)
  				: (st_old.st_mode & 0002))))
  	{
  	    int	tt = msg_didany;
  
  	    /* avoid a wait_return for this message, it's annoying */
  	    EMSG2(_("E137: Viminfo file is not writable: %s"), fname);
  	    msg_didany = tt;
  	    fclose(fp_in);
  	    goto end;
  	}
  #endif
  #ifdef WIN3264
  	/* Get the file attributes of the existing viminfo file. */
  	perm = mch_getperm(fname);
  #endif
  
  	/*
  	 * Make tempname.
  	 * May try twice: Once normal and once with shortname set, just in
  	 * case somebody puts his viminfo file in an 8.3 filesystem.
  	 */
  	for (;;)
  	{
  	    tempname = buf_modname(
  #ifdef UNIX
  				    shortname,
  #else
  # ifdef SHORT_FNAME
  				    TRUE,
  # else
  #  ifdef FEAT_GUI_W32
  				    gui_is_win32s(),
  #  else
  				    FALSE,
  #  endif
  # endif
  #endif
  				    fname,
  #ifdef VMS
  				    (char_u *)"-tmp",
  #else
  				    (char_u *)".tmp",
  #endif
  				    FALSE);
  	    if (tempname == NULL)		/* out of memory */
  		break;
  
  	    /*
  	     * Check if tempfile already exists.  Never overwrite an
  	     * existing file!
  	     */
  	    if (mch_stat((char *)tempname, &st_new) == 0)
  	    {
  #ifdef UNIX
  		/*
  		 * Check if tempfile is same as original file.  May happen
  		 * when modname() gave the same file back.  E.g.  silly
  		 * link, or file name-length reached.  Try again with
  		 * shortname set.
  		 */
  		if (!shortname && st_new.st_dev == st_old.st_dev
  					    && st_new.st_ino == st_old.st_ino)
  		{
  		    vim_free(tempname);
  		    tempname = NULL;
  		    shortname = TRUE;
  		    continue;
  		}
  #endif
  		/*
  		 * Try another name.  Change one character, just before
  		 * the extension.  This should also work for an 8.3
  		 * file name, when after adding the extension it still is
  		 * the same file as the original.
  		 */
  		wp = tempname + STRLEN(tempname) - 5;
  		if (wp < gettail(tempname))	    /* empty file name? */
  		    wp = gettail(tempname);
  		for (*wp = 'z'; mch_stat((char *)tempname, &st_new) == 0;
  								    --*wp)
  		{
  		    /*
  		     * They all exist?  Must be something wrong! Don't
  		     * write the viminfo file then.
  		     */
  		    if (*wp == 'a')
  		    {
  			vim_free(tempname);
  			tempname = NULL;
  			break;
  		    }
  		}
  	    }
  	    break;
  	}
  
  	if (tempname != NULL)
  	{
  #ifdef VMS
  	    /* fdopen() fails for some reason */
  	    umask_save = umask(077);
  	    fp_out = mch_fopen((char *)tempname, WRITEBIN);
  	    (void)umask(umask_save);
  #else
  	    int	fd;
  
  	    /* Use mch_open() to be able to use O_NOFOLLOW and set file
  	     * protection:
  	     * Unix: same as original file, but strip s-bit.  Reset umask to
  	     * avoid it getting in the way.
  	     * Others: r&w for user only. */
  # ifdef UNIX
  	    umask_save = umask(0);
  	    fd = mch_open((char *)tempname,
  		    O_CREAT|O_EXTRA|O_EXCL|O_WRONLY|O_NOFOLLOW,
  				       (int)((st_old.st_mode & 0777) | 0600));
  	    (void)umask(umask_save);
  # else
  	    fd = mch_open((char *)tempname,
  			    O_CREAT|O_EXTRA|O_EXCL|O_WRONLY|O_NOFOLLOW, 0600);
  # endif
  	    if (fd < 0)
  		fp_out = NULL;
  	    else
  		fp_out = fdopen(fd, WRITEBIN);
  #endif /* VMS */
  
  	    /*
  	     * If we can't create in the same directory, try creating a
  	     * "normal" temp file.
  	     */
  	    if (fp_out == NULL)
  	    {
  		vim_free(tempname);
  		if ((tempname = vim_tempname('o')) != NULL)
  		    fp_out = mch_fopen((char *)tempname, WRITEBIN);
  	    }
  
  #if defined(UNIX) && defined(HAVE_FCHOWN)
  	    /*
  	     * Make sure the owner can read/write it.  This only works for
  	     * root.
  	     */
  	    if (fp_out != NULL)
  		ignored = fchown(fileno(fp_out), st_old.st_uid, st_old.st_gid);
  #endif
  	}
      }
  
      /*
       * Check if the new viminfo file can be written to.
       */
      if (fp_out == NULL)
      {
  	EMSG2(_("E138: Can't write viminfo file %s!"),
  		       (fp_in == NULL || tempname == NULL) ? fname : tempname);
  	if (fp_in != NULL)
  	    fclose(fp_in);
  	goto end;
      }
  
      if (p_verbose > 0)
      {
  	verbose_enter();
  	smsg((char_u *)_("Writing viminfo file \"%s\""), fname);
  	verbose_leave();
      }
  
      viminfo_errcnt = 0;
      do_viminfo(fp_in, fp_out, forceit ? 0 : (VIF_WANT_INFO | VIF_WANT_MARKS));
  
      fclose(fp_out);	    /* errors are ignored !? */
      if (fp_in != NULL)
      {
  	fclose(fp_in);
  
  	/*
  	 * In case of an error keep the original viminfo file.
  	 * Otherwise rename the newly written file.
  	 */
  	if (viminfo_errcnt || vim_rename(tempname, fname) == -1)
  	    mch_remove(tempname);
  
  #ifdef WIN3264
  	/* If the viminfo file was hidden then also hide the new file. */
  	if (perm > 0 && (perm & FILE_ATTRIBUTE_HIDDEN))
  	    mch_hide(fname);
  #endif
      }
  
  end:
      vim_free(fname);
      vim_free(tempname);
  }
  
  /*
   * Get the viminfo file name to use.
   * If "file" is given and not empty, use it (has already been expanded by
   * cmdline functions).
   * Otherwise use "-i file_name", value from 'viminfo' or the default, and
   * expand environment variables.
   * Returns an allocated string.  NULL when out of memory.
   */
      static char_u *
  viminfo_filename(file)
      char_u	*file;
  {
      if (file == NULL || *file == NUL)
      {
  	if (use_viminfo != NULL)
  	    file = use_viminfo;
  	else if ((file = find_viminfo_parameter('n')) == NULL || *file == NUL)
  	{
  #ifdef VIMINFO_FILE2
  	    /* don't use $HOME when not defined (turned into "c:/"!). */
  # ifdef VMS
  	    if (mch_getenv((char_u *)"SYS$LOGIN") == NULL)
  # else
  	    if (mch_getenv((char_u *)"HOME") == NULL)
  # endif
  	    {
  		/* don't use $VIM when not available. */
  		expand_env((char_u *)"$VIM", NameBuff, MAXPATHL);
  		if (STRCMP("$VIM", NameBuff) != 0)  /* $VIM was expanded */
  		    file = (char_u *)VIMINFO_FILE2;
  		else
  		    file = (char_u *)VIMINFO_FILE;
  	    }
  	    else
  #endif
  		file = (char_u *)VIMINFO_FILE;
  	}
  	expand_env(file, NameBuff, MAXPATHL);
  	file = NameBuff;
      }
      return vim_strsave(file);
  }
  
  /*
   * do_viminfo() -- Should only be called from read_viminfo() & write_viminfo().
   */
      static void
  do_viminfo(fp_in, fp_out, flags)
      FILE	*fp_in;
      FILE	*fp_out;
      int		flags;
  {
      int		count = 0;
      int		eof = FALSE;
      vir_T	vir;
      int		merge = FALSE;
  
      if ((vir.vir_line = alloc(LSIZE)) == NULL)
  	return;
      vir.vir_fd = fp_in;
  #ifdef FEAT_MBYTE
      vir.vir_conv.vc_type = CONV_NONE;
  #endif
  
      if (fp_in != NULL)
      {
  	if (flags & VIF_WANT_INFO)
  	{
  	    eof = read_viminfo_up_to_marks(&vir,
  					 flags & VIF_FORCEIT, fp_out != NULL);
  	    merge = TRUE;
  	}
  	else if (flags != 0)
  	    /* Skip info, find start of marks */
  	    while (!(eof = viminfo_readline(&vir))
  		    && vir.vir_line[0] != '>')
  		;
      }
      if (fp_out != NULL)
      {
  	/* Write the info: */
  	fprintf(fp_out, _("# This viminfo file was generated by Vim %s.\n"),
  							  VIM_VERSION_MEDIUM);
  	fputs(_("# You may edit it if you're careful!\n\n"), fp_out);
  #ifdef FEAT_MBYTE
  	fputs(_("# Value of 'encoding' when this file was written\n"), fp_out);
  	fprintf(fp_out, "*encoding=%s\n\n", p_enc);
  #endif
  	write_viminfo_search_pattern(fp_out);
  	write_viminfo_sub_string(fp_out);
  #ifdef FEAT_CMDHIST
  	write_viminfo_history(fp_out, merge);
  #endif
  	write_viminfo_registers(fp_out);
  #ifdef FEAT_EVAL
  	write_viminfo_varlist(fp_out);
  #endif
  	write_viminfo_filemarks(fp_out);
  	write_viminfo_bufferlist(fp_out);
  	count = write_viminfo_marks(fp_out);
      }
      if (fp_in != NULL
  	    && (flags & (VIF_WANT_MARKS | VIF_GET_OLDFILES | VIF_FORCEIT)))
  	copy_viminfo_marks(&vir, fp_out, count, eof, flags);
  
      vim_free(vir.vir_line);
  #ifdef FEAT_MBYTE
      if (vir.vir_conv.vc_type != CONV_NONE)
  	convert_setup(&vir.vir_conv, NULL, NULL);
  #endif
  }
  
  /*
   * read_viminfo_up_to_marks() -- Only called from do_viminfo().  Reads in the
   * first part of the viminfo file which contains everything but the marks that
   * are local to a file.  Returns TRUE when end-of-file is reached. -- webb
   */
      static int
  read_viminfo_up_to_marks(virp, forceit, writing)
      vir_T	*virp;
      int		forceit;
      int		writing;
  {
      int		eof;
      buf_T	*buf;
  
  #ifdef FEAT_CMDHIST
      prepare_viminfo_history(forceit ? 9999 : 0, writing);
  #endif
      eof = viminfo_readline(virp);
      while (!eof && virp->vir_line[0] != '>')
      {
  	switch (virp->vir_line[0])
  	{
  		/* Characters reserved for future expansion, ignored now */
  	    case '+': /* "+40 /path/dir file", for running vim without args */
  	    case '|': /* to be defined */
  	    case '^': /* to be defined */
  	    case '<': /* long line - ignored */
  		/* A comment or empty line. */
  	    case NUL:
  	    case '\r':
  	    case '\n':
  	    case '#':
  		eof = viminfo_readline(virp);
  		break;
  	    case '*': /* "*encoding=value" */
  		eof = viminfo_encoding(virp);
  		break;
  	    case '!': /* global variable */
  #ifdef FEAT_EVAL
  		eof = read_viminfo_varlist(virp, writing);
  #else
  		eof = viminfo_readline(virp);
  #endif
  		break;
  	    case '%': /* entry for buffer list */
  		eof = read_viminfo_bufferlist(virp, writing);
  		break;
  	    case '"':
  		eof = read_viminfo_register(virp, forceit);
  		break;
  	    case '/':	    /* Search string */
  	    case '&':	    /* Substitute search string */
  	    case '~':	    /* Last search string, followed by '/' or '&' */
  		eof = read_viminfo_search_pattern(virp, forceit);
  		break;
  	    case '$':
  		eof = read_viminfo_sub_string(virp, forceit);
  		break;
  	    case ':':
  	    case '?':
  	    case '=':
  	    case '@':
  #ifdef FEAT_CMDHIST
  		eof = read_viminfo_history(virp, writing);
  #else
  		eof = viminfo_readline(virp);
  #endif
  		break;
  	    case '-':
  	    case '\'':
  		eof = read_viminfo_filemark(virp, forceit);
  		break;
  	    default:
  		if (viminfo_error("E575: ", _("Illegal starting char"),
  			    virp->vir_line))
  		    eof = TRUE;
  		else
  		    eof = viminfo_readline(virp);
  		break;
  	}
      }
  
  #ifdef FEAT_CMDHIST
      /* Finish reading history items. */
      if (!writing)
  	finish_viminfo_history();
  #endif
  
      /* Change file names to buffer numbers for fmarks. */
      for (buf = firstbuf; buf != NULL; buf = buf->b_next)
  	fmarks_check_names(buf);
  
      return eof;
  }
  
  /*
   * Compare the 'encoding' value in the viminfo file with the current value of
   * 'encoding'.  If different and the 'c' flag is in 'viminfo', setup for
   * conversion of text with iconv() in viminfo_readstring().
   */
      static int
  viminfo_encoding(virp)
      vir_T	*virp;
  {
  #ifdef FEAT_MBYTE
      char_u	*p;
      int		i;
  
      if (get_viminfo_parameter('c') != 0)
      {
  	p = vim_strchr(virp->vir_line, '=');
  	if (p != NULL)
  	{
  	    /* remove trailing newline */
  	    ++p;
  	    for (i = 0; vim_isprintc(p[i]); ++i)
  		;
  	    p[i] = NUL;
  
  	    convert_setup(&virp->vir_conv, p, p_enc);
  	}
      }
  #endif
      return viminfo_readline(virp);
  }
  
  /*
   * Read a line from the viminfo file.
   * Returns TRUE for end-of-file;
   */
      int
  viminfo_readline(virp)
      vir_T	*virp;
  {
      return vim_fgets(virp->vir_line, LSIZE, virp->vir_fd);
  }
  
  /*
   * check string read from viminfo file
   * remove '\n' at the end of the line
   * - replace CTRL-V CTRL-V with CTRL-V
   * - replace CTRL-V 'n'    with '\n'
   *
   * Check for a long line as written by viminfo_writestring().
   *
   * Return the string in allocated memory (NULL when out of memory).
   */
      char_u *
  viminfo_readstring(virp, off, convert)
      vir_T	*virp;
      int		off;		    /* offset for virp->vir_line */
      int		convert UNUSED;	    /* convert the string */
  {
      char_u	*retval;
      char_u	*s, *d;
      long	len;
  
      if (virp->vir_line[off] == Ctrl_V && vim_isdigit(virp->vir_line[off + 1]))
      {
  	len = atol((char *)virp->vir_line + off + 1);
  	retval = lalloc(len, TRUE);
  	if (retval == NULL)
  	{
  	    /* Line too long?  File messed up?  Skip next line. */
  	    (void)vim_fgets(virp->vir_line, 10, virp->vir_fd);
  	    return NULL;
  	}
  	(void)vim_fgets(retval, (int)len, virp->vir_fd);
  	s = retval + 1;	    /* Skip the leading '<' */
      }
      else
      {
  	retval = vim_strsave(virp->vir_line + off);
  	if (retval == NULL)
  	    return NULL;
  	s = retval;
      }
  
      /* Change CTRL-V CTRL-V to CTRL-V and CTRL-V n to \n in-place. */
      d = retval;
      while (*s != NUL && *s != '\n')
      {
  	if (s[0] == Ctrl_V && s[1] != NUL)
  	{
  	    if (s[1] == 'n')
  		*d++ = '\n';
  	    else
  		*d++ = Ctrl_V;
  	    s += 2;
  	}
  	else
  	    *d++ = *s++;
      }
      *d = NUL;
  
  #ifdef FEAT_MBYTE
      if (convert && virp->vir_conv.vc_type != CONV_NONE && *retval != NUL)
      {
  	d = string_convert(&virp->vir_conv, retval, NULL);
  	if (d != NULL)
  	{
  	    vim_free(retval);
  	    retval = d;
  	}
      }
  #endif
  
      return retval;
  }
  
  /*
   * write string to viminfo file
   * - replace CTRL-V with CTRL-V CTRL-V
   * - replace '\n'   with CTRL-V 'n'
   * - add a '\n' at the end
   *
   * For a long line:
   * - write " CTRL-V <length> \n " in first line
   * - write " < <string> \n "	  in second line
   */
      void
  viminfo_writestring(fd, p)
      FILE	*fd;
      char_u	*p;
  {
      int		c;
      char_u	*s;
      int		len = 0;
  
      for (s = p; *s != NUL; ++s)
      {
  	if (*s == Ctrl_V || *s == '\n')
  	    ++len;
  	++len;
      }
  
      /* If the string will be too long, write its length and put it in the next
       * line.  Take into account that some room is needed for what comes before
       * the string (e.g., variable name).  Add something to the length for the
       * '<', NL and trailing NUL. */
      if (len > LSIZE / 2)
  	fprintf(fd, IF_EB("\026%d\n<", CTRL_V_STR "%d\n<"), len + 3);
  
      while ((c = *p++) != NUL)
      {
  	if (c == Ctrl_V || c == '\n')
  	{
  	    putc(Ctrl_V, fd);
  	    if (c == '\n')
  		c = 'n';
  	}
  	putc(c, fd);
      }
      putc('\n', fd);
  }
  #endif /* FEAT_VIMINFO */
  
  /*
   * Implementation of ":fixdel", also used by get_stty().
   *  <BS>    resulting <Del>
   *   ^?		^H
   * not ^?	^?
   */
      void
  do_fixdel(eap)
      exarg_T	*eap UNUSED;
  {
      char_u  *p;
  
      p = find_termcode((char_u *)"kb");
      add_termcode((char_u *)"kD", p != NULL
  	    && *p == DEL ? (char_u *)CTRL_H_STR : DEL_STR, FALSE);
  }
  
      void
  print_line_no_prefix(lnum, use_number, list)
      linenr_T	lnum;
      int		use_number;
      int		list;
  {
      char_u	numbuf[30];
  
      if (curwin->w_p_nu || use_number)
      {
  	vim_snprintf((char *)numbuf, sizeof(numbuf),
  				   "%*ld ", number_width(curwin), (long)lnum);
  	msg_puts_attr(numbuf, hl_attr(HLF_N));	/* Highlight line nrs */
      }
      msg_prt_line(ml_get(lnum), list);
  }
  
  /*
   * Print a text line.  Also in silent mode ("ex -s").
   */
      void
  print_line(lnum, use_number, list)
      linenr_T	lnum;
      int		use_number;
      int		list;
  {
      int		save_silent = silent_mode;
  
      msg_start();
      silent_mode = FALSE;
      info_message = TRUE;	/* use mch_msg(), not mch_errmsg() */
      print_line_no_prefix(lnum, use_number, list);
      if (save_silent)
      {
  	msg_putchar('\n');
  	cursor_on();		/* msg_start() switches it off */
  	out_flush();
  	silent_mode = save_silent;
      }
      info_message = FALSE;
  }
  
      int
  rename_buffer(new_fname)
      char_u	*new_fname;
  {
      char_u	*fname, *sfname, *xfname;
      buf_T	*buf;
  
  #ifdef FEAT_AUTOCMD
      buf = curbuf;
      apply_autocmds(EVENT_BUFFILEPRE, NULL, NULL, FALSE, curbuf);
      /* buffer changed, don't change name now */
      if (buf != curbuf)
  	return FAIL;
  # ifdef FEAT_EVAL
      if (aborting())	    /* autocmds may abort script processing */
  	return FAIL;
  # endif
  #endif
      /*
       * The name of the current buffer will be changed.
       * A new (unlisted) buffer entry needs to be made to hold the old file
       * name, which will become the alternate file name.
       * But don't set the alternate file name if the buffer didn't have a
       * name.
       */
      fname = curbuf->b_ffname;
      sfname = curbuf->b_sfname;
      xfname = curbuf->b_fname;
      curbuf->b_ffname = NULL;
      curbuf->b_sfname = NULL;
      if (setfname(curbuf, new_fname, NULL, TRUE) == FAIL)
      {
  	curbuf->b_ffname = fname;
  	curbuf->b_sfname = sfname;
  	return FAIL;
      }
      curbuf->b_flags |= BF_NOTEDITED;
      if (xfname != NULL && *xfname != NUL)
      {
  	buf = buflist_new(fname, xfname, curwin->w_cursor.lnum, 0);
  	if (buf != NULL && !cmdmod.keepalt)
  	    curwin->w_alt_fnum = buf->b_fnum;
      }
      vim_free(fname);
      vim_free(sfname);
  #ifdef FEAT_AUTOCMD
      apply_autocmds(EVENT_BUFFILEPOST, NULL, NULL, FALSE, curbuf);
  #endif
      /* Change directories when the 'acd' option is set. */
      DO_AUTOCHDIR
      return OK;
  }
  
  /*
   * ":file[!] [fname]".
   */
      void
  ex_file(eap)
      exarg_T	*eap;
  {
      /* ":0file" removes the file name.  Check for illegal uses ":3file",
       * "0file name", etc. */
      if (eap->addr_count > 0
  	    && (*eap->arg != NUL
  		|| eap->line2 > 0
  		|| eap->addr_count > 1))
      {
  	EMSG(_(e_invarg));
  	return;
      }
  
      if (*eap->arg != NUL || eap->addr_count == 1)
      {
  	if (rename_buffer(eap->arg) == FAIL)
  	    return;
      }
      /* print full file name if :cd used */
      fileinfo(FALSE, FALSE, eap->forceit);
  }
  
  /*
   * ":update".
   */
      void
  ex_update(eap)
      exarg_T	*eap;
  {
      if (curbufIsChanged())
  	(void)do_write(eap);
  }
  
  /*
   * ":write" and ":saveas".
   */
      void
  ex_write(eap)
      exarg_T	*eap;
  {
      if (eap->usefilter)		/* input lines to shell command */
  	do_bang(1, eap, FALSE, TRUE, FALSE);
      else
  	(void)do_write(eap);
  }
  
  /*
   * write current buffer to file 'eap->arg'
   * if 'eap->append' is TRUE, append to the file
   *
   * if *eap->arg == NUL write to current file
   *
   * return FAIL for failure, OK otherwise
   */
      int
  do_write(eap)
      exarg_T	*eap;
  {
      int		other;
      char_u	*fname = NULL;		/* init to shut up gcc */
      char_u	*ffname;
      int		retval = FAIL;
      char_u	*free_fname = NULL;
  #ifdef FEAT_BROWSE
      char_u	*browse_file = NULL;
  #endif
      buf_T	*alt_buf = NULL;
  
      if (not_writing())		/* check 'write' option */
  	return FAIL;
  
      ffname = eap->arg;
  #ifdef FEAT_BROWSE
      if (cmdmod.browse)
      {
  	browse_file = do_browse(BROWSE_SAVE, (char_u *)_("Save As"), ffname,
  						    NULL, NULL, NULL, curbuf);
  	if (browse_file == NULL)
  	    goto theend;
  	ffname = browse_file;
      }
  #endif
      if (*ffname == NUL)
      {
  	if (eap->cmdidx == CMD_saveas)
  	{
  	    EMSG(_(e_argreq));
  	    goto theend;
  	}
  	other = FALSE;
      }
      else
      {
  	fname = ffname;
  	free_fname = fix_fname(ffname);
  	/*
  	 * When out-of-memory, keep unexpanded file name, because we MUST be
  	 * able to write the file in this situation.
  	 */
  	if (free_fname != NULL)
  	    ffname = free_fname;
  	other = otherfile(ffname);
      }
  
      /*
       * If we have a new file, put its name in the list of alternate file names.
       */
      if (other)
      {
  	if (vim_strchr(p_cpo, CPO_ALTWRITE) != NULL
  						 || eap->cmdidx == CMD_saveas)
  	    alt_buf = setaltfname(ffname, fname, (linenr_T)1);
  	else
  	    alt_buf = buflist_findname(ffname);
  	if (alt_buf != NULL && alt_buf->b_ml.ml_mfp != NULL)
  	{
  	    /* Overwriting a file that is loaded in another buffer is not a
  	     * good idea. */
  	    EMSG(_(e_bufloaded));
  	    goto theend;
  	}
      }
  
      /*
       * Writing to the current file is not allowed in readonly mode
       * and a file name is required.
       * "nofile" and "nowrite" buffers cannot be written implicitly either.
       */
      if (!other && (
  #ifdef FEAT_QUICKFIX
  		bt_dontwrite_msg(curbuf) ||
  #endif
  		check_fname() == FAIL || check_readonly(&eap->forceit, curbuf)))
  	goto theend;
  
      if (!other)
      {
  	ffname = curbuf->b_ffname;
  	fname = curbuf->b_fname;
  	/*
  	 * Not writing the whole file is only allowed with '!'.
  	 */
  	if (	   (eap->line1 != 1
  		    || eap->line2 != curbuf->b_ml.ml_line_count)
  		&& !eap->forceit
  		&& !eap->append
  		&& !p_wa)
  	{
  #if defined(FEAT_GUI_DIALOG) || defined(FEAT_CON_DIALOG)
  	    if (p_confirm || cmdmod.confirm)
  	    {
  		if (vim_dialog_yesno(VIM_QUESTION, NULL,
  			       (char_u *)_("Write partial file?"), 2) != VIM_YES)
  		    goto theend;
  		eap->forceit = TRUE;
  	    }
  	    else
  #endif
  	    {
  		EMSG(_("E140: Use ! to write partial buffer"));
  		goto theend;
  	    }
  	}
      }
  
      if (check_overwrite(eap, curbuf, fname, ffname, other) == OK)
      {
  	if (eap->cmdidx == CMD_saveas && alt_buf != NULL)
  	{
  #ifdef FEAT_AUTOCMD
  	    buf_T	*was_curbuf = curbuf;
  
  	    apply_autocmds(EVENT_BUFFILEPRE, NULL, NULL, FALSE, curbuf);
  	    apply_autocmds(EVENT_BUFFILEPRE, NULL, NULL, FALSE, alt_buf);
  # ifdef FEAT_EVAL
  	    if (curbuf != was_curbuf || aborting())
  # else
  	    if (curbuf != was_curbuf)
  # endif
  	    {
  		/* buffer changed, don't change name now */
  		retval = FAIL;
  		goto theend;
  	    }
  #endif
  	    /* Exchange the file names for the current and the alternate
  	     * buffer.  This makes it look like we are now editing the buffer
  	     * under the new name.  Must be done before buf_write(), because
  	     * if there is no file name and 'cpo' contains 'F', it will set
  	     * the file name. */
  	    fname = alt_buf->b_fname;
  	    alt_buf->b_fname = curbuf->b_fname;
  	    curbuf->b_fname = fname;
  	    fname = alt_buf->b_ffname;
  	    alt_buf->b_ffname = curbuf->b_ffname;
  	    curbuf->b_ffname = fname;
  	    fname = alt_buf->b_sfname;
  	    alt_buf->b_sfname = curbuf->b_sfname;
  	    curbuf->b_sfname = fname;
  	    buf_name_changed(curbuf);
  #ifdef FEAT_AUTOCMD
  	    apply_autocmds(EVENT_BUFFILEPOST, NULL, NULL, FALSE, curbuf);
  	    apply_autocmds(EVENT_BUFFILEPOST, NULL, NULL, FALSE, alt_buf);
  	    if (!alt_buf->b_p_bl)
  	    {
  		alt_buf->b_p_bl = TRUE;
  		apply_autocmds(EVENT_BUFADD, NULL, NULL, FALSE, alt_buf);
  	    }
  # ifdef FEAT_EVAL
  	    if (curbuf != was_curbuf || aborting())
  # else
  	    if (curbuf != was_curbuf)
  # endif
  	    {
  		/* buffer changed, don't write the file */
  		retval = FAIL;
  		goto theend;
  	    }
  
  	    /* If 'filetype' was empty try detecting it now. */
  	    if (*curbuf->b_p_ft == NUL)
  	    {
  		if (au_has_group((char_u *)"filetypedetect"))
  		    (void)do_doautocmd((char_u *)"filetypedetect BufRead",
  									TRUE);
  		do_modelines(0);
  	    }
  
  	    /* Autocommands may have changed buffer names, esp. when
  	     * 'autochdir' is set. */
  	    fname = curbuf->b_sfname;
  #endif
  	}
  
  	retval = buf_write(curbuf, ffname, fname, eap->line1, eap->line2,
  				 eap, eap->append, eap->forceit, TRUE, FALSE);
  
  	/* After ":saveas fname" reset 'readonly'. */
  	if (eap->cmdidx == CMD_saveas)
  	{
  	    if (retval == OK)
  	    {
  		curbuf->b_p_ro = FALSE;
  #ifdef FEAT_WINDOWS
  		redraw_tabline = TRUE;
  #endif
  	    }
  	    /* Change directories when the 'acd' option is set. */
  	    DO_AUTOCHDIR
  	}
      }
  
  theend:
  #ifdef FEAT_BROWSE
      vim_free(browse_file);
  #endif
      vim_free(free_fname);
      return retval;
  }
  
  /*
   * Check if it is allowed to overwrite a file.  If b_flags has BF_NOTEDITED,
   * BF_NEW or BF_READERR, check for overwriting current file.
   * May set eap->forceit if a dialog says it's OK to overwrite.
   * Return OK if it's OK, FAIL if it is not.
   */
      int
  check_overwrite(eap, buf, fname, ffname, other)
      exarg_T	*eap;
      buf_T	*buf;
      char_u	*fname;	    /* file name to be used (can differ from
  			       buf->ffname) */
      char_u	*ffname;    /* full path version of fname */
      int		other;	    /* writing under other name */
  {
      /*
       * write to other file or b_flags set or not writing the whole file:
       * overwriting only allowed with '!'
       */
      if (       (other
  		|| (buf->b_flags & BF_NOTEDITED)
  		|| ((buf->b_flags & BF_NEW)
  		    && vim_strchr(p_cpo, CPO_OVERNEW) == NULL)
  		|| (buf->b_flags & BF_READERR))
  	    && !p_wa
  #ifdef FEAT_QUICKFIX
  	    && !bt_nofile(buf)
  #endif
  	    && vim_fexists(ffname))
      {
  	if (!eap->forceit && !eap->append)
  	{
  #ifdef UNIX
  	    /* with UNIX it is possible to open a directory */
  	    if (mch_isdir(ffname))
  	    {
  		EMSG2(_(e_isadir2), ffname);
  		return FAIL;
  	    }
  #endif
  #if defined(FEAT_GUI_DIALOG) || defined(FEAT_CON_DIALOG)
  	    if (p_confirm || cmdmod.confirm)
  	    {
  		char_u	buff[DIALOG_MSG_SIZE];
  
  		dialog_msg(buff, _("Overwrite existing file \"%s\"?"), fname);
  		if (vim_dialog_yesno(VIM_QUESTION, NULL, buff, 2) != VIM_YES)
  		    return FAIL;
  		eap->forceit = TRUE;
  	    }
  	    else
  #endif
  	    {
  		EMSG(_(e_exists));
  		return FAIL;
  	    }
  	}
  
  	/* For ":w! filename" check that no swap file exists for "filename". */
  	if (other && !emsg_silent)
  	{
  	    char_u	*dir;
  	    char_u	*p;
  	    int		r;
  	    char_u	*swapname;
  
  	    /* We only try the first entry in 'directory', without checking if
  	     * it's writable.  If the "." directory is not writable the write
  	     * will probably fail anyway.
  	     * Use 'shortname' of the current buffer, since there is no buffer
  	     * for the written file. */
  	    if (*p_dir == NUL)
  	    {
  		dir = alloc(5);
  		if (dir == NULL)
  		    return FAIL;
  		STRCPY(dir, ".");
  	    }
  	    else
  	    {
  		dir = alloc(MAXPATHL);
  		if (dir == NULL)
  		    return FAIL;
  		p = p_dir;
  		copy_option_part(&p, dir, MAXPATHL, ",");
  	    }
  	    swapname = makeswapname(fname, ffname, curbuf, dir);
  	    vim_free(dir);
  	    r = vim_fexists(swapname);
  	    if (r)
  	    {
  #if defined(FEAT_GUI_DIALOG) || defined(FEAT_CON_DIALOG)
  		if (p_confirm || cmdmod.confirm)
  		{
  		    char_u	buff[DIALOG_MSG_SIZE];
  
  		    dialog_msg(buff,
  			    _("Swap file \"%s\" exists, overwrite anyway?"),
  								    swapname);
  		    if (vim_dialog_yesno(VIM_QUESTION, NULL, buff, 2)
  								   != VIM_YES)
  		    {
  			vim_free(swapname);
  			return FAIL;
  		    }
  		    eap->forceit = TRUE;
  		}
  		else
  #endif
  		{
  		    EMSG2(_("E768: Swap file exists: %s (:silent! overrides)"),
  								    swapname);
  		    vim_free(swapname);
  		    return FAIL;
  		}
  	    }
  	    vim_free(swapname);
  	}
      }
      return OK;
  }
  
  /*
   * Handle ":wnext", ":wNext" and ":wprevious" commands.
   */
      void
  ex_wnext(eap)
      exarg_T	*eap;
  {
      int		i;
  
      if (eap->cmd[1] == 'n')
  	i = curwin->w_arg_idx + (int)eap->line2;
      else
  	i = curwin->w_arg_idx - (int)eap->line2;
      eap->line1 = 1;
      eap->line2 = curbuf->b_ml.ml_line_count;
      if (do_write(eap) != FAIL)
  	do_argfile(eap, i);
  }
  
  /*
   * ":wall", ":wqall" and ":xall": Write all changed files (and exit).
   */
      void
  do_wqall(eap)
      exarg_T	*eap;
  {
      buf_T	*buf;
      int		error = 0;
      int		save_forceit = eap->forceit;
  
      if (eap->cmdidx == CMD_xall || eap->cmdidx == CMD_wqall)
  	exiting = TRUE;
  
      for (buf = firstbuf; buf != NULL; buf = buf->b_next)
      {
  	if (bufIsChanged(buf))
  	{
  	    /*
  	     * Check if there is a reason the buffer cannot be written:
  	     * 1. if the 'write' option is set
  	     * 2. if there is no file name (even after browsing)
  	     * 3. if the 'readonly' is set (even after a dialog)
  	     * 4. if overwriting is allowed (even after a dialog)
  	     */
  	    if (not_writing())
  	    {
  		++error;
  		break;
  	    }
  #ifdef FEAT_BROWSE
  	    /* ":browse wall": ask for file name if there isn't one */
  	    if (buf->b_ffname == NULL && cmdmod.browse)
  		browse_save_fname(buf);
  #endif
  	    if (buf->b_ffname == NULL)
  	    {
  		EMSGN(_("E141: No file name for buffer %ld"), (long)buf->b_fnum);
  		++error;
  	    }
  	    else if (check_readonly(&eap->forceit, buf)
  		    || check_overwrite(eap, buf, buf->b_fname, buf->b_ffname,
  							       FALSE) == FAIL)
  	    {
  		++error;
  	    }
  	    else
  	    {
  		if (buf_write_all(buf, eap->forceit) == FAIL)
  		    ++error;
  #ifdef FEAT_AUTOCMD
  		/* an autocommand may have deleted the buffer */
  		if (!buf_valid(buf))
  		    buf = firstbuf;
  #endif
  	    }
  	    eap->forceit = save_forceit;    /* check_overwrite() may set it */
  	}
      }
      if (exiting)
      {
  	if (!error)
  	    getout(0);		/* exit Vim */
  	not_exiting();
      }
  }
  
  /*
   * Check the 'write' option.
   * Return TRUE and give a message when it's not st.
   */
      int
  not_writing()
  {
      if (p_write)
  	return FALSE;
      EMSG(_("E142: File not written: Writing is disabled by 'write' option"));
      return TRUE;
  }
  
  /*
   * Check if a buffer is read-only (either 'readonly' option is set or file is
   * read-only). Ask for overruling in a dialog. Return TRUE and give an error
   * message when the buffer is readonly.
   */
      static int
  check_readonly(forceit, buf)
      int		*forceit;
      buf_T	*buf;
  {
      struct stat	st;
  
      /* Handle a file being readonly when the 'readonly' option is set or when
       * the file exists and permissions are read-only.
       * We will send 0777 to check_file_readonly(), as the "perm" variable is
       * important for device checks but not here. */
      if (!*forceit && (buf->b_p_ro
  		|| (mch_stat((char *)buf->b_ffname, &st) >= 0
  		    && check_file_readonly(buf->b_ffname, 0777))))
      {
  #if defined(FEAT_GUI_DIALOG) || defined(FEAT_CON_DIALOG)
  	if ((p_confirm || cmdmod.confirm) && buf->b_fname != NULL)
  	{
  	    char_u	buff[DIALOG_MSG_SIZE];
  
  	    if (buf->b_p_ro)
  		dialog_msg(buff, _("'readonly' option is set for \"%s\".\nDo you wish to write anyway?"),
  		    buf->b_fname);
  	    else
  		dialog_msg(buff, _("File permissions of \"%s\" are read-only.\nIt may still be possible to write it.\nDo you wish to try?"),
  		    buf->b_fname);
  
  	    if (vim_dialog_yesno(VIM_QUESTION, NULL, buff, 2) == VIM_YES)
  	    {
  		/* Set forceit, to force the writing of a readonly file */
  		*forceit = TRUE;
  		return FALSE;
  	    }
  	    else
  		return TRUE;
  	}
  	else
  #endif
  	if (buf->b_p_ro)
  	    EMSG(_(e_readonly));
  	else
  	    EMSG2(_("E505: \"%s\" is read-only (add ! to override)"),
  		    buf->b_fname);
  	return TRUE;
      }
  
      return FALSE;
  }
  
  /*
   * Try to abandon current file and edit a new or existing file.
   * 'fnum' is the number of the file, if zero use ffname/sfname.
   *
   * Return 1 for "normal" error, 2 for "not written" error, 0 for success
   * -1 for successfully opening another file.
   * 'lnum' is the line number for the cursor in the new file (if non-zero).
   */
      int
  getfile(fnum, ffname, sfname, setpm, lnum, forceit)
      int		fnum;
      char_u	*ffname;
      char_u	*sfname;
      int		setpm;
      linenr_T	lnum;
      int		forceit;
  {
      int		other;
      int		retval;
      char_u	*free_me = NULL;
  
      if (text_locked())
  	return 1;
  #ifdef FEAT_AUTOCMD
      if (curbuf_locked())
  	return 1;
  #endif
  
      if (fnum == 0)
      {
  					/* make ffname full path, set sfname */
  	fname_expand(curbuf, &ffname, &sfname);
  	other = otherfile(ffname);
  	free_me = ffname;		/* has been allocated, free() later */
      }
      else
  	other = (fnum != curbuf->b_fnum);
  
      if (other)
  	++no_wait_return;	    /* don't wait for autowrite message */
      if (other && !forceit && curbuf->b_nwindows == 1 && !P_HID(curbuf)
  		   && curbufIsChanged() && autowrite(curbuf, forceit) == FAIL)
      {
  #if defined(FEAT_GUI_DIALOG) || defined(FEAT_CON_DIALOG)
  	if (p_confirm && p_write)
  	    dialog_changed(curbuf, FALSE);
  	if (curbufIsChanged())
  #endif
  	{
  	    if (other)
  		--no_wait_return;
  	    EMSG(_(e_nowrtmsg));
  	    retval = 2;	/* file has been changed */
  	    goto theend;
  	}
      }
      if (other)
  	--no_wait_return;
      if (setpm)
  	setpcmark();
      if (!other)
      {
  	if (lnum != 0)
  	    curwin->w_cursor.lnum = lnum;
  	check_cursor_lnum();
  	beginline(BL_SOL | BL_FIX);
  	retval = 0;	/* it's in the same file */
      }
      else if (do_ecmd(fnum, ffname, sfname, NULL, lnum,
  		(P_HID(curbuf) ? ECMD_HIDE : 0) + (forceit ? ECMD_FORCEIT : 0),
  		curwin) == OK)
  	retval = -1;	/* opened another file */
      else
  	retval = 1;	/* error encountered */
  
  theend:
      vim_free(free_me);
      return retval;
  }
  
  /*
   * start editing a new file
   *
   *     fnum: file number; if zero use ffname/sfname
   *   ffname: the file name
   *		- full path if sfname used,
   *		- any file name if sfname is NULL
   *		- empty string to re-edit with the same file name (but may be
   *		    in a different directory)
   *		- NULL to start an empty buffer
   *   sfname: the short file name (or NULL)
   *	eap: contains the command to be executed after loading the file and
   *	     forced 'ff' and 'fenc'
   *  newlnum: if > 0: put cursor on this line number (if possible)
   *	     if ECMD_LASTL: use last position in loaded file
   *	     if ECMD_LAST: use last position in all files
   *	     if ECMD_ONE: use first line
   *    flags:
   *	   ECMD_HIDE: if TRUE don't free the current buffer
   *     ECMD_SET_HELP: set b_help flag of (new) buffer before opening file
   *	 ECMD_OLDBUF: use existing buffer if it exists
   *	ECMD_FORCEIT: ! used for Ex command
   *	 ECMD_ADDBUF: don't edit, just add to buffer list
   *   oldwin: Should be "curwin" when editing a new buffer in the current
   *	     window, NULL when splitting the window first.  When not NULL info
   *	     of the previous buffer for "oldwin" is stored.
   *
   * return FAIL for failure, OK otherwise
   */
      int
  do_ecmd(fnum, ffname, sfname, eap, newlnum, flags, oldwin)
      int		fnum;
      char_u	*ffname;
      char_u	*sfname;
      exarg_T	*eap;			/* can be NULL! */
      linenr_T	newlnum;
      int		flags;
      win_T	*oldwin;
  {
      int		other_file;		/* TRUE if editing another file */
      int		oldbuf;			/* TRUE if using existing buffer */
  #ifdef FEAT_AUTOCMD
      int		auto_buf = FALSE;	/* TRUE if autocommands brought us
  					   into the buffer unexpectedly */
      char_u	*new_name = NULL;
      int		did_set_swapcommand = FALSE;
  #endif
      buf_T	*buf;
  #if defined(FEAT_AUTOCMD) || defined(FEAT_GUI_DIALOG) || defined(FEAT_CON_DIALOG)
      buf_T	*old_curbuf = curbuf;
  #endif
      char_u	*free_fname = NULL;
  #ifdef FEAT_BROWSE
      char_u	*browse_file = NULL;
  #endif
      int		retval = FAIL;
      long	n;
      linenr_T	lnum;
      linenr_T	topline = 0;
      int		newcol = -1;
      int		solcol = -1;
      pos_T	*pos;
  #ifdef FEAT_SUN_WORKSHOP
      char_u	*cp;
  #endif
      char_u	*command = NULL;
  #ifdef FEAT_SPELL
      int		did_get_winopts = FALSE;
  #endif
      int		readfile_flags = 0;
  
      if (eap != NULL)
  	command = eap->do_ecmd_cmd;
  
      if (fnum != 0)
      {
  	if (fnum == curbuf->b_fnum)	/* file is already being edited */
  	    return OK;			/* nothing to do */
  	other_file = TRUE;
      }
      else
      {
  #ifdef FEAT_BROWSE
  	if (cmdmod.browse)
  	{
  # ifdef FEAT_AUTOCMD
  	    if (
  #  ifdef FEAT_GUI
  		!gui.in_use &&
  #  endif
  		    au_has_group((char_u *)"FileExplorer"))
  	    {
  		/* No browsing supported but we do have the file explorer:
  		 * Edit the directory. */
  		if (ffname == NULL || !mch_isdir(ffname))
  		    ffname = (char_u *)".";
  	    }
  	    else
  # endif
  	    {
  		browse_file = do_browse(0, (char_u *)_("Edit File"), ffname,
  						    NULL, NULL, NULL, curbuf);
  		if (browse_file == NULL)
  		    goto theend;
  		ffname = browse_file;
  	    }
  	}
  #endif
  	/* if no short name given, use ffname for short name */
  	if (sfname == NULL)
  	    sfname = ffname;
  #ifdef USE_FNAME_CASE
  # ifdef USE_LONG_FNAME
  	if (USE_LONG_FNAME)
  # endif
  	    if (sfname != NULL)
  		fname_case(sfname, 0);   /* set correct case for sfname */
  #endif
  
  #ifdef FEAT_LISTCMDS
  	if ((flags & ECMD_ADDBUF) && (ffname == NULL || *ffname == NUL))
  	    goto theend;
  #endif
  
  	if (ffname == NULL)
  	    other_file = TRUE;
  					    /* there is no file name */
  	else if (*ffname == NUL && curbuf->b_ffname == NULL)
  	    other_file = FALSE;
  	else
  	{
  	    if (*ffname == NUL)		    /* re-edit with same file name */
  	    {
  		ffname = curbuf->b_ffname;
  		sfname = curbuf->b_fname;
  	    }
  	    free_fname = fix_fname(ffname); /* may expand to full path name */
  	    if (free_fname != NULL)
  		ffname = free_fname;
  	    other_file = otherfile(ffname);
  #ifdef FEAT_SUN_WORKSHOP
  	    if (usingSunWorkShop && p_acd
  				   && (cp = vim_strrchr(sfname, '/')) != NULL)
  		sfname = ++cp;
  #endif
  	}
      }
  
      /*
       * if the file was changed we may not be allowed to abandon it
       * - if we are going to re-edit the same file
       * - or if we are the only window on this file and if ECMD_HIDE is FALSE
       */
      if (  ((!other_file && !(flags & ECMD_OLDBUF))
  	    || (curbuf->b_nwindows == 1
  		&& !(flags & (ECMD_HIDE | ECMD_ADDBUF))))
  	&& check_changed(curbuf, p_awa, !other_file,
  					(flags & ECMD_FORCEIT), FALSE))
      {
  	if (fnum == 0 && other_file && ffname != NULL)
  	    (void)setaltfname(ffname, sfname, newlnum < 0 ? 0 : newlnum);
  	goto theend;
      }
  
  #ifdef FEAT_VISUAL
      /*
       * End Visual mode before switching to another buffer, so the text can be
       * copied into the GUI selection buffer.
       */
      reset_VIsual();
  #endif
  
  #ifdef FEAT_AUTOCMD
      if ((command != NULL || newlnum > (linenr_T)0)
  	    && *get_vim_var_str(VV_SWAPCOMMAND) == NUL)
      {
  	int	len;
  	char_u	*p;
  
  	/* Set v:swapcommand for the SwapExists autocommands. */
  	if (command != NULL)
  	    len = (int)STRLEN(command) + 3;
  	else
  	    len = 30;
  	p = alloc((unsigned)len);
  	if (p != NULL)
  	{
  	    if (command != NULL)
  		vim_snprintf((char *)p, len, ":%s\r", command);
  	    else
  		vim_snprintf((char *)p, len, "%ldG", (long)newlnum);
  	    set_vim_var_string(VV_SWAPCOMMAND, p, -1);
  	    did_set_swapcommand = TRUE;
  	    vim_free(p);
  	}
      }
  #endif
  
      /*
       * If we are starting to edit another file, open a (new) buffer.
       * Otherwise we re-use the current buffer.
       */
      if (other_file)
      {
  #ifdef FEAT_LISTCMDS
  	if (!(flags & ECMD_ADDBUF))
  #endif
  	{
  	    if (!cmdmod.keepalt)
  		curwin->w_alt_fnum = curbuf->b_fnum;
  	    if (oldwin != NULL)
  		buflist_altfpos(oldwin);
  	}
  
  	if (fnum)
  	    buf = buflist_findnr(fnum);
  	else
  	{
  #ifdef FEAT_LISTCMDS
  	    if (flags & ECMD_ADDBUF)
  	    {
  		linenr_T	tlnum = 1L;
  
  		if (command != NULL)
  		{
  		    tlnum = atol((char *)command);
  		    if (tlnum <= 0)
  			tlnum = 1L;
  		}
  		(void)buflist_new(ffname, sfname, tlnum, BLN_LISTED);
  		goto theend;
  	    }
  #endif
  	    buf = buflist_new(ffname, sfname, 0L,
  		    BLN_CURBUF | ((flags & ECMD_SET_HELP) ? 0 : BLN_LISTED));
  	}
  	if (buf == NULL)
  	    goto theend;
  	if (buf->b_ml.ml_mfp == NULL)		/* no memfile yet */
  	{
  	    oldbuf = FALSE;
  	    buf->b_nwindows = 0;
  	}
  	else					/* existing memfile */
  	{
  	    oldbuf = TRUE;
  	    (void)buf_check_timestamp(buf, FALSE);
  	    /* Check if autocommands made buffer invalid or changed the current
  	     * buffer. */
  	    if (!buf_valid(buf)
  #ifdef FEAT_AUTOCMD
  		    || curbuf != old_curbuf
  #endif
  		    )
  		goto theend;
  #ifdef FEAT_EVAL
  	    if (aborting())	    /* autocmds may abort script processing */
  		goto theend;
  #endif
  	}
  
  	/* May jump to last used line number for a loaded buffer or when asked
  	 * for explicitly */
  	if ((oldbuf && newlnum == ECMD_LASTL) || newlnum == ECMD_LAST)
  	{
  	    pos = buflist_findfpos(buf);
  	    newlnum = pos->lnum;
  	    solcol = pos->col;
  	}
  
  	/*
  	 * Make the (new) buffer the one used by the current window.
  	 * If the old buffer becomes unused, free it if ECMD_HIDE is FALSE.
  	 * If the current buffer was empty and has no file name, curbuf
  	 * is returned by buflist_new().
  	 */
  	if (buf != curbuf)
  	{
  #ifdef FEAT_AUTOCMD
  	    /*
  	     * Be careful: The autocommands may delete any buffer and change
  	     * the current buffer.
  	     * - If the buffer we are going to edit is deleted, give up.
  	     * - If the current buffer is deleted, prefer to load the new
  	     *   buffer when loading a buffer is required.  This avoids
  	     *   loading another buffer which then must be closed again.
  	     * - If we ended up in the new buffer already, need to skip a few
  	     *	 things, set auto_buf.
  	     */
  	    if (buf->b_fname != NULL)
  		new_name = vim_strsave(buf->b_fname);
  	    au_new_curbuf = buf;
  	    apply_autocmds(EVENT_BUFLEAVE, NULL, NULL, FALSE, curbuf);
  	    if (!buf_valid(buf))	/* new buffer has been deleted */
  	    {
  		delbuf_msg(new_name);	/* frees new_name */
  		goto theend;
  	    }
  # ifdef FEAT_EVAL
  	    if (aborting())	    /* autocmds may abort script processing */
  	    {
  		vim_free(new_name);
  		goto theend;
  	    }
  # endif
  	    if (buf == curbuf)		/* already in new buffer */
  		auto_buf = TRUE;
  	    else
  	    {
  		if (curbuf == old_curbuf)
  #endif
  		    buf_copy_options(buf, BCO_ENTER);
  
  		/* close the link to the current buffer */
  		u_sync(FALSE);
  		close_buffer(oldwin, curbuf,
  			       (flags & ECMD_HIDE) ? 0 : DOBUF_UNLOAD, FALSE);
  
  #ifdef FEAT_AUTOCMD
  		/* Autocommands may open a new window and leave oldwin open
  		 * which leads to crashes since the above call sets
  		 * oldwin->w_buffer to NULL. */
  		if (curwin != oldwin && oldwin != aucmd_win
  			     && win_valid(oldwin) && oldwin->w_buffer == NULL)
  		    win_close(oldwin, FALSE);
  
  # ifdef FEAT_EVAL
  		if (aborting())	    /* autocmds may abort script processing */
  		{
  		    vim_free(new_name);
  		    goto theend;
  		}
  # endif
  		/* Be careful again, like above. */
  		if (!buf_valid(buf))	/* new buffer has been deleted */
  		{
  		    delbuf_msg(new_name);	/* frees new_name */
  		    goto theend;
  		}
  		if (buf == curbuf)		/* already in new buffer */
  		    auto_buf = TRUE;
  		else
  #endif
  		{
  #ifdef FEAT_SYN_HL
  		    /*
  		     * <VN> We could instead free the synblock
  		     * and re-attach to buffer, perhaps.
  		     */
  		    if (curwin->w_s == &(curwin->w_buffer->b_s))
  			curwin->w_s = &(buf->b_s);
  #endif
  		    curwin->w_buffer = buf;
  		    curbuf = buf;
  		    ++curbuf->b_nwindows;
  
  		    /* Set 'fileformat', 'binary' and 'fenc' when forced. */
  		    if (!oldbuf && eap != NULL)
  		    {
  			set_file_options(TRUE, eap);
  #ifdef FEAT_MBYTE
  			set_forced_fenc(eap);
  #endif
  		    }
  		}
  
  		/* May get the window options from the last time this buffer
  		 * was in this window (or another window).  If not used
  		 * before, reset the local window options to the global
  		 * values.  Also restores old folding stuff. */
  		get_winopts(curbuf);
  #ifdef FEAT_SPELL
  		did_get_winopts = TRUE;
  #endif
  
  #ifdef FEAT_AUTOCMD
  	    }
  	    vim_free(new_name);
  	    au_new_curbuf = NULL;
  #endif
  	}
  	else
  	    ++curbuf->b_nwindows;
  
  	curwin->w_pcmark.lnum = 1;
  	curwin->w_pcmark.col = 0;
      }
      else /* !other_file */
      {
  	if (
  #ifdef FEAT_LISTCMDS
  		(flags & ECMD_ADDBUF) ||
  #endif
  		check_fname() == FAIL)
  	    goto theend;
  	oldbuf = (flags & ECMD_OLDBUF);
      }
  
      if ((flags & ECMD_SET_HELP) || keep_help_flag)
      {
  	char_u	*p;
  
  	curbuf->b_help = TRUE;
  #ifdef FEAT_QUICKFIX
  	set_string_option_direct((char_u *)"buftype", -1,
  				     (char_u *)"help", OPT_FREE|OPT_LOCAL, 0);
  #endif
  
  	/*
  	 * Always set these options after jumping to a help tag, because the
  	 * user may have an autocommand that gets in the way.
  	 * Accept all ASCII chars for keywords, except ' ', '*', '"', '|', and
  	 * latin1 word characters (for translated help files).
  	 * Only set it when needed, buf_init_chartab() is some work.
  	 */
  	p =
  #ifdef EBCDIC
  		(char_u *)"65-255,^*,^|,^\"";
  #else
  		(char_u *)"!-~,^*,^|,^\",192-255";
  #endif
  	if (STRCMP(curbuf->b_p_isk, p) != 0)
  	{
  	    set_string_option_direct((char_u *)"isk", -1, p,
  						       OPT_FREE|OPT_LOCAL, 0);
  	    check_buf_options(curbuf);
  	    (void)buf_init_chartab(curbuf, FALSE);
  	}
  
  	curbuf->b_p_ts = 8;		/* 'tabstop' is 8 */
  	curwin->w_p_list = FALSE;	/* no list mode */
  
  	curbuf->b_p_ma = FALSE;		/* not modifiable */
  	curbuf->b_p_bin = FALSE;	/* reset 'bin' before reading file */
  	curwin->w_p_nu = 0;		/* no line numbers */
  	curwin->w_p_rnu = 0;		/* no relative line numbers */
  	RESET_BINDING(curwin);		/* no scroll or cursor binding */
  #ifdef FEAT_ARABIC
  	curwin->w_p_arab = FALSE;	/* no arabic mode */
  #endif
  #ifdef FEAT_RIGHTLEFT
  	curwin->w_p_rl  = FALSE;	/* help window is left-to-right */
  #endif
  #ifdef FEAT_FOLDING
  	curwin->w_p_fen = FALSE;	/* No folding in the help window */
  #endif
  #ifdef FEAT_DIFF
  	curwin->w_p_diff = FALSE;	/* No 'diff' */
  #endif
  #ifdef FEAT_SPELL
  	curwin->w_p_spell = FALSE;	/* No spell checking */
  #endif
  
  #ifdef FEAT_AUTOCMD
  	buf = curbuf;
  #endif
  	set_buflisted(FALSE);
      }
      else
      {
  #ifdef FEAT_AUTOCMD
  	buf = curbuf;
  #endif
  	/* Don't make a buffer listed if it's a help buffer.  Useful when
  	 * using CTRL-O to go back to a help file. */
  	if (!curbuf->b_help)
  	    set_buflisted(TRUE);
      }
  
  #ifdef FEAT_AUTOCMD
      /* If autocommands change buffers under our fingers, forget about
       * editing the file. */
      if (buf != curbuf)
  	goto theend;
  # ifdef FEAT_EVAL
      if (aborting())	    /* autocmds may abort script processing */
  	goto theend;
  # endif
  
      /* Since we are starting to edit a file, consider the filetype to be
       * unset.  Helps for when an autocommand changes files and expects syntax
       * highlighting to work in the other file. */
      did_filetype = FALSE;
  #endif
  
  /*
   * other_file	oldbuf
   *  FALSE	FALSE	    re-edit same file, buffer is re-used
   *  FALSE	TRUE	    re-edit same file, nothing changes
   *  TRUE	FALSE	    start editing new file, new buffer
   *  TRUE	TRUE	    start editing in existing buffer (nothing to do)
   */
      if (!other_file && !oldbuf)		/* re-use the buffer */
      {
  	set_last_cursor(curwin);	/* may set b_last_cursor */
  	if (newlnum == ECMD_LAST || newlnum == ECMD_LASTL)
  	{
  	    newlnum = curwin->w_cursor.lnum;
  	    solcol = curwin->w_cursor.col;
  	}
  #ifdef FEAT_AUTOCMD
  	buf = curbuf;
  	if (buf->b_fname != NULL)
  	    new_name = vim_strsave(buf->b_fname);
  	else
  	    new_name = NULL;
  #endif
  	if (p_ur < 0 || curbuf->b_ml.ml_line_count <= p_ur)
  	{
  	    /* Save all the text, so that the reload can be undone.
  	     * Sync first so that this is a separate undo-able action. */
  	    u_sync(FALSE);
  	    if (u_savecommon(0, curbuf->b_ml.ml_line_count + 1, 0, TRUE)
  								     == FAIL)
  		goto theend;
  	    u_unchanged(curbuf);
  	    buf_freeall(curbuf, BFA_KEEP_UNDO);
  
  	    /* tell readfile() not to clear or reload undo info */
  	    readfile_flags = READ_KEEP_UNDO;
  	}
  	else
  	    buf_freeall(curbuf, 0);   /* free all things for buffer */
  #ifdef FEAT_AUTOCMD
  	/* If autocommands deleted the buffer we were going to re-edit, give
  	 * up and jump to the end. */
  	if (!buf_valid(buf))
  	{
  	    delbuf_msg(new_name);	/* frees new_name */
  	    goto theend;
  	}
  	vim_free(new_name);
  
  	/* If autocommands change buffers under our fingers, forget about
  	 * re-editing the file.  Should do the buf_clear_file(), but perhaps
  	 * the autocommands changed the buffer... */
  	if (buf != curbuf)
  	    goto theend;
  # ifdef FEAT_EVAL
  	if (aborting())	    /* autocmds may abort script processing */
  	    goto theend;
  # endif
  #endif
  	buf_clear_file(curbuf);
  	curbuf->b_op_start.lnum = 0;	/* clear '[ and '] marks */
  	curbuf->b_op_end.lnum = 0;
      }
  
  /*
   * If we get here we are sure to start editing
   */
      /* don't redraw until the cursor is in the right line */
      ++RedrawingDisabled;
  
      /* Assume success now */
      retval = OK;
  
      /*
       * Reset cursor position, could be used by autocommands.
       */
      check_cursor();
  
      /*
       * Check if we are editing the w_arg_idx file in the argument list.
       */
      check_arg_idx(curwin);
  
  #ifdef FEAT_AUTOCMD
      if (!auto_buf)
  #endif
      {
  	/*
  	 * Set cursor and init window before reading the file and executing
  	 * autocommands.  This allows for the autocommands to position the
  	 * cursor.
  	 */
  	curwin_init();
  
  #ifdef FEAT_FOLDING
  	/* It's possible that all lines in the buffer changed.  Need to update
  	 * automatic folding for all windows where it's used. */
  # ifdef FEAT_WINDOWS
  	{
  	    win_T	    *win;
  	    tabpage_T	    *tp;
  
  	    FOR_ALL_TAB_WINDOWS(tp, win)
  		if (win->w_buffer == curbuf)
  		    foldUpdateAll(win);
  	}
  # else
  	foldUpdateAll(curwin);
  # endif
  #endif
  
  	/* Change directories when the 'acd' option is set. */
  	DO_AUTOCHDIR
  
  	/*
  	 * Careful: open_buffer() and apply_autocmds() may change the current
  	 * buffer and window.
  	 */
  	lnum = curwin->w_cursor.lnum;
  	topline = curwin->w_topline;
  	if (!oldbuf)			    /* need to read the file */
  	{
  #if defined(HAS_SWAP_EXISTS_ACTION)
  	    swap_exists_action = SEA_DIALOG;
  #endif
  	    curbuf->b_flags |= BF_CHECK_RO; /* set/reset 'ro' flag */
  
  	    /*
  	     * Open the buffer and read the file.
  	     */
  #if defined(FEAT_AUTOCMD) && defined(FEAT_EVAL)
  	    if (should_abort(open_buffer(FALSE, eap, readfile_flags)))
  		retval = FAIL;
  #else
  	    (void)open_buffer(FALSE, eap, readfile_flags);
  #endif
  
  #if defined(HAS_SWAP_EXISTS_ACTION)
  	    if (swap_exists_action == SEA_QUIT)
  		retval = FAIL;
  	    handle_swap_exists(old_curbuf);
  #endif
  	}
  #ifdef FEAT_AUTOCMD
  	else
  	{
  	    /* Read the modelines, but only to set window-local options.  Any
  	     * buffer-local options have already been set and may have been
  	     * changed by the user. */
  	    do_modelines(OPT_WINONLY);
  
  	    apply_autocmds_retval(EVENT_BUFENTER, NULL, NULL, FALSE, curbuf,
  								    &retval);
  	    apply_autocmds_retval(EVENT_BUFWINENTER, NULL, NULL, FALSE, curbuf,
  								    &retval);
  	}
  	check_arg_idx(curwin);
  #endif
  
  	/*
  	 * If autocommands change the cursor position or topline, we should
  	 * keep it.
  	 */
  	if (curwin->w_cursor.lnum != lnum)
  	{
  	    newlnum = curwin->w_cursor.lnum;
  	    newcol = curwin->w_cursor.col;
  	}
  	if (curwin->w_topline == topline)
  	    topline = 0;
  
  	/* Even when cursor didn't move we need to recompute topline. */
  	changed_line_abv_curs();
  
  #ifdef FEAT_TITLE
  	maketitle();
  #endif
      }
  
  #ifdef FEAT_DIFF
      /* Tell the diff stuff that this buffer is new and/or needs updating.
       * Also needed when re-editing the same buffer, because unloading will
       * have removed it as a diff buffer. */
      if (curwin->w_p_diff)
      {
  	diff_buf_add(curbuf);
  	diff_invalidate(curbuf);
      }
  #endif
  
  #ifdef FEAT_SPELL
      /* If the window options were changed may need to set the spell language.
       * Can only do this after the buffer has been properly setup. */
      if (did_get_winopts && curwin->w_p_spell && *curwin->w_s->b_p_spl != NUL)
  	(void)did_set_spelllang(curwin);
  #endif
  
      if (command == NULL)
      {
  	if (newcol >= 0)	/* position set by autocommands */
  	{
  	    curwin->w_cursor.lnum = newlnum;
  	    curwin->w_cursor.col = newcol;
  	    check_cursor();
  	}
  	else if (newlnum > 0)	/* line number from caller or old position */
  	{
  	    curwin->w_cursor.lnum = newlnum;
  	    check_cursor_lnum();
  	    if (solcol >= 0 && !p_sol)
  	    {
  		/* 'sol' is off: Use last known column. */
  		curwin->w_cursor.col = solcol;
  		check_cursor_col();
  #ifdef FEAT_VIRTUALEDIT
  		curwin->w_cursor.coladd = 0;
  #endif
  		curwin->w_set_curswant = TRUE;
  	    }
  	    else
  		beginline(BL_SOL | BL_FIX);
  	}
  	else			/* no line number, go to last line in Ex mode */
  	{
  	    if (exmode_active)
  		curwin->w_cursor.lnum = curbuf->b_ml.ml_line_count;
  	    beginline(BL_WHITE | BL_FIX);
  	}
      }
  
  #ifdef FEAT_WINDOWS
      /* Check if cursors in other windows on the same buffer are still valid */
      check_lnums(FALSE);
  #endif
  
      /*
       * Did not read the file, need to show some info about the file.
       * Do this after setting the cursor.
       */
      if (oldbuf
  #ifdef FEAT_AUTOCMD
  		&& !auto_buf
  #endif
  			    )
      {
  	int	msg_scroll_save = msg_scroll;
  
  	/* Obey the 'O' flag in 'cpoptions': overwrite any previous file
  	 * message. */
  	if (shortmess(SHM_OVERALL) && !exiting && p_verbose == 0)
  	    msg_scroll = FALSE;
  	if (!msg_scroll)	/* wait a bit when overwriting an error msg */
  	    check_for_delay(FALSE);
  	msg_start();
  	msg_scroll = msg_scroll_save;
  	msg_scrolled_ign = TRUE;
  
  	fileinfo(FALSE, TRUE, FALSE);
  
  	msg_scrolled_ign = FALSE;
      }
  
      if (command != NULL)
  	do_cmdline(command, NULL, NULL, DOCMD_VERBOSE);
  
  #ifdef FEAT_KEYMAP
      if (curbuf->b_kmap_state & KEYMAP_INIT)
  	(void)keymap_init();
  #endif
  
      --RedrawingDisabled;
      if (!skip_redraw)
      {
  	n = p_so;
  	if (topline == 0 && command == NULL)
  	    p_so = 999;			/* force cursor halfway the window */
  	update_topline();
  #ifdef FEAT_SCROLLBIND
  	curwin->w_scbind_pos = curwin->w_topline;
  #endif
  	p_so = n;
  	redraw_curbuf_later(NOT_VALID);	/* redraw this buffer later */
      }
  
      if (p_im)
  	need_start_insertmode = TRUE;
  
      /* Change directories when the 'acd' option is set. */
      DO_AUTOCHDIR
  
  #if defined(FEAT_SUN_WORKSHOP) || defined(FEAT_NETBEANS_INTG)
      if (curbuf->b_ffname != NULL)
      {
  # ifdef FEAT_SUN_WORKSHOP
  	if (gui.in_use && usingSunWorkShop)
  	    workshop_file_opened((char *)curbuf->b_ffname, curbuf->b_p_ro);
  # endif
  # ifdef FEAT_NETBEANS_INTG
  	if ((flags & ECMD_SET_HELP) != ECMD_SET_HELP)
  	    netbeans_file_opened(curbuf);
  # endif
      }
  #endif
  
  theend:
  #ifdef FEAT_AUTOCMD
      if (did_set_swapcommand)
  	set_vim_var_string(VV_SWAPCOMMAND, NULL, -1);
  #endif
  #ifdef FEAT_BROWSE
      vim_free(browse_file);
  #endif
      vim_free(free_fname);
      return retval;
  }
  
  #ifdef FEAT_AUTOCMD
      static void
  delbuf_msg(name)
      char_u	*name;
  {
      EMSG2(_("E143: Autocommands unexpectedly deleted new buffer %s"),
  	    name == NULL ? (char_u *)"" : name);
      vim_free(name);
      au_new_curbuf = NULL;
  }
  #endif
  
  static int append_indent = 0;	    /* autoindent for first line */
  
  /*
   * ":insert" and ":append", also used by ":change"
   */
      void
  ex_append(eap)
      exarg_T	*eap;
  {
      char_u	*theline;
      int		did_undo = FALSE;
      linenr_T	lnum = eap->line2;
      int		indent = 0;
      char_u	*p;
      int		vcol;
      int		empty = (curbuf->b_ml.ml_flags & ML_EMPTY);
  
      /* the ! flag toggles autoindent */
      if (eap->forceit)
  	curbuf->b_p_ai = !curbuf->b_p_ai;
  
      /* First autoindent comes from the line we start on */
      if (eap->cmdidx != CMD_change && curbuf->b_p_ai && lnum > 0)
  	append_indent = get_indent_lnum(lnum);
  
      if (eap->cmdidx != CMD_append)
  	--lnum;
  
      /* when the buffer is empty append to line 0 and delete the dummy line */
      if (empty && lnum == 1)
  	lnum = 0;
  
      State = INSERT;		    /* behave like in Insert mode */
      if (curbuf->b_p_iminsert == B_IMODE_LMAP)
  	State |= LANGMAP;
  
      for (;;)
      {
  	msg_scroll = TRUE;
  	need_wait_return = FALSE;
  	if (curbuf->b_p_ai)
  	{
  	    if (append_indent >= 0)
  	    {
  		indent = append_indent;
  		append_indent = -1;
  	    }
  	    else if (lnum > 0)
  		indent = get_indent_lnum(lnum);
  	}
  	ex_keep_indent = FALSE;
  	if (eap->getline == NULL)
  	{
  	    /* No getline() function, use the lines that follow. This ends
  	     * when there is no more. */
  	    if (eap->nextcmd == NULL || *eap->nextcmd == NUL)
  		break;
  	    p = vim_strchr(eap->nextcmd, NL);
  	    if (p == NULL)
  		p = eap->nextcmd + STRLEN(eap->nextcmd);
  	    theline = vim_strnsave(eap->nextcmd, (int)(p - eap->nextcmd));
  	    if (*p != NUL)
  		++p;
  	    eap->nextcmd = p;
  	}
  	else
  	    theline = eap->getline(
  #ifdef FEAT_EVAL
  		    eap->cstack->cs_looplevel > 0 ? -1 :
  #endif
  		    NUL, eap->cookie, indent);
  	lines_left = Rows - 1;
  	if (theline == NULL)
  	    break;
  
  	/* Using ^ CTRL-D in getexmodeline() makes us repeat the indent. */
  	if (ex_keep_indent)
  	    append_indent = indent;
  
  	/* Look for the "." after automatic indent. */
  	vcol = 0;
  	for (p = theline; indent > vcol; ++p)
  	{
  	    if (*p == ' ')
  		++vcol;
  	    else if (*p == TAB)
  		vcol += 8 - vcol % 8;
  	    else
  		break;
  	}
  	if ((p[0] == '.' && p[1] == NUL)
  		|| (!did_undo && u_save(lnum, lnum + 1 + (empty ? 1 : 0))
  								     == FAIL))
  	{
  	    vim_free(theline);
  	    break;
  	}
  
  	/* don't use autoindent if nothing was typed. */
  	if (p[0] == NUL)
  	    theline[0] = NUL;
  
  	did_undo = TRUE;
  	ml_append(lnum, theline, (colnr_T)0, FALSE);
  	appended_lines_mark(lnum, 1L);
  
  	vim_free(theline);
  	++lnum;
  
  	if (empty)
  	{
  	    ml_delete(2L, FALSE);
  	    empty = FALSE;
  	}
      }
      State = NORMAL;
  
      if (eap->forceit)
  	curbuf->b_p_ai = !curbuf->b_p_ai;
  
      /* "start" is set to eap->line2+1 unless that position is invalid (when
       * eap->line2 pointed to the end of the buffer and nothing was appended)
       * "end" is set to lnum when something has been appended, otherwise
       * it is the same than "start"  -- Acevedo */
      curbuf->b_op_start.lnum = (eap->line2 < curbuf->b_ml.ml_line_count) ?
  	eap->line2 + 1 : curbuf->b_ml.ml_line_count;
      if (eap->cmdidx != CMD_append)
  	--curbuf->b_op_start.lnum;
      curbuf->b_op_end.lnum = (eap->line2 < lnum)
  					     ? lnum : curbuf->b_op_start.lnum;
      curbuf->b_op_start.col = curbuf->b_op_end.col = 0;
      curwin->w_cursor.lnum = lnum;
      check_cursor_lnum();
      beginline(BL_SOL | BL_FIX);
  
      need_wait_return = FALSE;	/* don't use wait_return() now */
      ex_no_reprint = TRUE;
  }
  
  /*
   * ":change"
   */
      void
  ex_change(eap)
      exarg_T	*eap;
  {
      linenr_T	lnum;
  
      if (eap->line2 >= eap->line1
  	    && u_save(eap->line1 - 1, eap->line2 + 1) == FAIL)
  	return;
  
      /* the ! flag toggles autoindent */
      if (eap->forceit ? !curbuf->b_p_ai : curbuf->b_p_ai)
  	append_indent = get_indent_lnum(eap->line1);
  
      for (lnum = eap->line2; lnum >= eap->line1; --lnum)
      {
  	if (curbuf->b_ml.ml_flags & ML_EMPTY)	    /* nothing to delete */
  	    break;
  	ml_delete(eap->line1, FALSE);
      }
  
      /* make sure the cursor is not beyond the end of the file now */
      check_cursor_lnum();
      deleted_lines_mark(eap->line1, (long)(eap->line2 - lnum));
  
      /* ":append" on the line above the deleted lines. */
      eap->line2 = eap->line1;
      ex_append(eap);
  }
  
      void
  ex_z(eap)
      exarg_T	*eap;
  {
      char_u	*x;
      int		bigness;
      char_u	*kind;
      int		minus = 0;
      linenr_T	start, end, curs, i;
      int		j;
      linenr_T	lnum = eap->line2;
  
      /* Vi compatible: ":z!" uses display height, without a count uses
       * 'scroll' */
      if (eap->forceit)
  	bigness = curwin->w_height;
      else if (firstwin == lastwin)
  	bigness = curwin->w_p_scr * 2;
  #ifdef FEAT_WINDOWS
      else
  	bigness = curwin->w_height - 3;
  #endif
      if (bigness < 1)
  	bigness = 1;
  
      x = eap->arg;
      kind = x;
      if (*kind == '-' || *kind == '+' || *kind == '='
  					      || *kind == '^' || *kind == '.')
  	++x;
      while (*x == '-' || *x == '+')
  	++x;
  
      if (*x != 0)
      {
  	if (!VIM_ISDIGIT(*x))
  	{
  	    EMSG(_("E144: non-numeric argument to :z"));
  	    return;
  	}
  	else
  	{
  	    bigness = atoi((char *)x);
  	    p_window = bigness;
  	    if (*kind == '=')
  		bigness += 2;
  	}
      }
  
      /* the number of '-' and '+' multiplies the distance */
      if (*kind == '-' || *kind == '+')
  	for (x = kind + 1; *x == *kind; ++x)
  	    ;
  
      switch (*kind)
      {
  	case '-':
  	    start = lnum - bigness * (linenr_T)(x - kind) + 1;
  	    end = start + bigness - 1;
  	    curs = end;
  	    break;
  
  	case '=':
  	    start = lnum - (bigness + 1) / 2 + 1;
  	    end = lnum + (bigness + 1) / 2 - 1;
  	    curs = lnum;
  	    minus = 1;
  	    break;
  
  	case '^':
  	    start = lnum - bigness * 2;
  	    end = lnum - bigness;
  	    curs = lnum - bigness;
  	    break;
  
  	case '.':
  	    start = lnum - (bigness + 1) / 2 + 1;
  	    end = lnum + (bigness + 1) / 2 - 1;
  	    curs = end;
  	    break;
  
  	default:  /* '+' */
  	    start = lnum;
  	    if (*kind == '+')
  		start += bigness * (linenr_T)(x - kind - 1) + 1;
  	    else if (eap->addr_count == 0)
  		++start;
  	    end = start + bigness - 1;
  	    curs = end;
  	    break;
      }
  
      if (start < 1)
  	start = 1;
  
      if (end > curbuf->b_ml.ml_line_count)
  	end = curbuf->b_ml.ml_line_count;
  
      if (curs > curbuf->b_ml.ml_line_count)
  	curs = curbuf->b_ml.ml_line_count;
  
      for (i = start; i <= end; i++)
      {
  	if (minus && i == lnum)
  	{
  	    msg_putchar('\n');
  
  	    for (j = 1; j < Columns; j++)
  		msg_putchar('-');
  	}
  
  	print_line(i, eap->flags & EXFLAG_NR, eap->flags & EXFLAG_LIST);
  
  	if (minus && i == lnum)
  	{
  	    msg_putchar('\n');
  
  	    for (j = 1; j < Columns; j++)
  		msg_putchar('-');
  	}
      }
  
      curwin->w_cursor.lnum = curs;
      ex_no_reprint = TRUE;
  }
  
  /*
   * Check if the restricted flag is set.
   * If so, give an error message and return TRUE.
   * Otherwise, return FALSE.
   */
      int
  check_restricted()
  {
      if (restricted)
      {
  	EMSG(_("E145: Shell commands not allowed in rvim"));
  	return TRUE;
      }
      return FALSE;
  }
  
  /*
   * Check if the secure flag is set (.exrc or .vimrc in current directory).
   * If so, give an error message and return TRUE.
   * Otherwise, return FALSE.
   */
      int
  check_secure()
  {
      if (secure)
      {
  	secure = 2;
  	EMSG(_(e_curdir));
  	return TRUE;
      }
  #ifdef HAVE_SANDBOX
      /*
       * In the sandbox more things are not allowed, including the things
       * disallowed in secure mode.
       */
      if (sandbox != 0)
      {
  	EMSG(_(e_sandbox));
  	return TRUE;
      }
  #endif
      return FALSE;
  }
  
  static char_u	*old_sub = NULL;	/* previous substitute pattern */
  static int	global_need_beginline;	/* call beginline() after ":g" */
  
  /* do_sub()
   *
   * Perform a substitution from line eap->line1 to line eap->line2 using the
   * command pointed to by eap->arg which should be of the form:
   *
   * /pattern/substitution/{flags}
   *
   * The usual escapes are supported as described in the regexp docs.
   */
      void
  do_sub(eap)
      exarg_T	*eap;
  {
      linenr_T	lnum;
      long	i = 0;
      regmmatch_T regmatch;
      static int	do_all = FALSE;		/* do multiple substitutions per line */
      static int	do_ask = FALSE;		/* ask for confirmation */
      static int	do_count = FALSE;	/* count only */
      static int	do_error = TRUE;	/* if false, ignore errors */
      static int	do_print = FALSE;	/* print last line with subs. */
      static int	do_list = FALSE;	/* list last line with subs. */
      static int	do_number = FALSE;	/* list last line with line nr*/
      static int	do_ic = 0;		/* ignore case flag */
      char_u	*pat = NULL, *sub = NULL;	/* init for GCC */
      int		delimiter;
      int		sublen;
      int		got_quit = FALSE;
      int		got_match = FALSE;
      int		temp;
      int		which_pat;
      char_u	*cmd;
      int		save_State;
      linenr_T	first_line = 0;		/* first changed line */
      linenr_T	last_line= 0;		/* below last changed line AFTER the
  					 * change */
      linenr_T	old_line_count = curbuf->b_ml.ml_line_count;
      linenr_T	line2;
      long	nmatch;			/* number of lines in match */
      char_u	*sub_firstline;		/* allocated copy of first sub line */
      int		endcolumn = FALSE;	/* cursor in last column when done */
      pos_T	old_cursor = curwin->w_cursor;
      int		start_nsubs;
  #ifdef FEAT_EVAL
      int         save_ma = 0;
  #endif
  
      cmd = eap->arg;
      if (!global_busy)
      {
  	sub_nsubs = 0;
  	sub_nlines = 0;
      }
      start_nsubs = sub_nsubs;
  
      if (eap->cmdidx == CMD_tilde)
  	which_pat = RE_LAST;	/* use last used regexp */
      else
  	which_pat = RE_SUBST;	/* use last substitute regexp */
  
  				/* new pattern and substitution */
      if (eap->cmd[0] == 's' && *cmd != NUL && !vim_iswhite(*cmd)
  		&& vim_strchr((char_u *)"0123456789cegriIp|\"", *cmd) == NULL)
      {
  				/* don't accept alphanumeric for separator */
  	if (isalpha(*cmd))
  	{
  	    EMSG(_("E146: Regular expressions can't be delimited by letters"));
  	    return;
  	}
  	/*
  	 * undocumented vi feature:
  	 *  "\/sub/" and "\?sub?" use last used search pattern (almost like
  	 *  //sub/r).  "\&sub&" use last substitute pattern (like //sub/).
  	 */
  	if (*cmd == '\\')
  	{
  	    ++cmd;
  	    if (vim_strchr((char_u *)"/?&", *cmd) == NULL)
  	    {
  		EMSG(_(e_backslash));
  		return;
  	    }
  	    if (*cmd != '&')
  		which_pat = RE_SEARCH;	    /* use last '/' pattern */
  	    pat = (char_u *)"";		    /* empty search pattern */
  	    delimiter = *cmd++;		    /* remember delimiter character */
  	}
  	else		/* find the end of the regexp */
  	{
  #ifdef FEAT_FKMAP	/* reverse the flow of the Farsi characters */
  	    if (p_altkeymap && curwin->w_p_rl)
  		lrF_sub(cmd);
  #endif
  	    which_pat = RE_LAST;	    /* use last used regexp */
  	    delimiter = *cmd++;		    /* remember delimiter character */
  	    pat = cmd;			    /* remember start of search pat */
  	    cmd = skip_regexp(cmd, delimiter, p_magic, &eap->arg);
  	    if (cmd[0] == delimiter)	    /* end delimiter found */
  		*cmd++ = NUL;		    /* replace it with a NUL */
  	}
  
  	/*
  	 * Small incompatibility: vi sees '\n' as end of the command, but in
  	 * Vim we want to use '\n' to find/substitute a NUL.
  	 */
  	sub = cmd;	    /* remember the start of the substitution */
  
  	while (cmd[0])
  	{
  	    if (cmd[0] == delimiter)		/* end delimiter found */
  	    {
  		*cmd++ = NUL;			/* replace it with a NUL */
  		break;
  	    }
  	    if (cmd[0] == '\\' && cmd[1] != 0)	/* skip escaped characters */
  		++cmd;
  	    mb_ptr_adv(cmd);
  	}
  
  	if (!eap->skip)
  	{
  	    /* In POSIX vi ":s/pat/%/" uses the previous subst. string. */
  	    if (STRCMP(sub, "%") == 0
  				 && vim_strchr(p_cpo, CPO_SUBPERCENT) != NULL)
  	    {
  		if (old_sub == NULL)	/* there is no previous command */
  		{
  		    EMSG(_(e_nopresub));
  		    return;
  		}
  		sub = old_sub;
  	    }
  	    else
  	    {
  		vim_free(old_sub);
  		old_sub = vim_strsave(sub);
  	    }
  	}
      }
      else if (!eap->skip)	/* use previous pattern and substitution */
      {
  	if (old_sub == NULL)	/* there is no previous command */
  	{
  	    EMSG(_(e_nopresub));
  	    return;
  	}
  	pat = NULL;		/* search_regcomp() will use previous pattern */
  	sub = old_sub;
  
  	/* Vi compatibility quirk: repeating with ":s" keeps the cursor in the
  	 * last column after using "$". */
  	endcolumn = (curwin->w_curswant == MAXCOL);
      }
  
      /*
       * Find trailing options.  When '&' is used, keep old options.
       */
      if (*cmd == '&')
  	++cmd;
      else
      {
  	if (!p_ed)
  	{
  	    if (p_gd)		/* default is global on */
  		do_all = TRUE;
  	    else
  		do_all = FALSE;
  	    do_ask = FALSE;
  	}
  	do_error = TRUE;
  	do_print = FALSE;
  	do_count = FALSE;
  	do_number = FALSE;
  	do_ic = 0;
      }
      while (*cmd)
      {
  	/*
  	 * Note that 'g' and 'c' are always inverted, also when p_ed is off.
  	 * 'r' is never inverted.
  	 */
  	if (*cmd == 'g')
  	    do_all = !do_all;
  	else if (*cmd == 'c')
  	    do_ask = !do_ask;
  	else if (*cmd == 'n')
  	    do_count = TRUE;
  	else if (*cmd == 'e')
  	    do_error = !do_error;
  	else if (*cmd == 'r')	    /* use last used regexp */
  	    which_pat = RE_LAST;
  	else if (*cmd == 'p')
  	    do_print = TRUE;
  	else if (*cmd == '#')
  	{
  	    do_print = TRUE;
  	    do_number = TRUE;
  	}
  	else if (*cmd == 'l')
  	{
  	    do_print = TRUE;
  	    do_list = TRUE;
  	}
  	else if (*cmd == 'i')	    /* ignore case */
  	    do_ic = 'i';
  	else if (*cmd == 'I')	    /* don't ignore case */
  	    do_ic = 'I';
  	else
  	    break;
  	++cmd;
      }
      if (do_count)
  	do_ask = FALSE;
  
      /*
       * check for a trailing count
       */
      cmd = skipwhite(cmd);
      if (VIM_ISDIGIT(*cmd))
      {
  	i = getdigits(&cmd);
  	if (i <= 0 && !eap->skip && do_error)
  	{
  	    EMSG(_(e_zerocount));
  	    return;
  	}
  	eap->line1 = eap->line2;
  	eap->line2 += i - 1;
  	if (eap->line2 > curbuf->b_ml.ml_line_count)
  	    eap->line2 = curbuf->b_ml.ml_line_count;
      }
  
      /*
       * check for trailing command or garbage
       */
      cmd = skipwhite(cmd);
      if (*cmd && *cmd != '"')	    /* if not end-of-line or comment */
      {
  	eap->nextcmd = check_nextcmd(cmd);
  	if (eap->nextcmd == NULL)
  	{
  	    EMSG(_(e_trailing));
  	    return;
  	}
      }
  
      if (eap->skip)	    /* not executing commands, only parsing */
  	return;
  
      if (!do_count && !curbuf->b_p_ma)
      {
  	/* Substitution is not allowed in non-'modifiable' buffer */
  	EMSG(_(e_modifiable));
  	return;
      }
  
      if (search_regcomp(pat, RE_SUBST, which_pat, SEARCH_HIS, &regmatch) == FAIL)
      {
  	if (do_error)
  	    EMSG(_(e_invcmd));
  	return;
      }
  
      /* the 'i' or 'I' flag overrules 'ignorecase' and 'smartcase' */
      if (do_ic == 'i')
  	regmatch.rmm_ic = TRUE;
      else if (do_ic == 'I')
  	regmatch.rmm_ic = FALSE;
  
      sub_firstline = NULL;
  
      /*
       * ~ in the substitute pattern is replaced with the old pattern.
       * We do it here once to avoid it to be replaced over and over again.
       * But don't do it when it starts with "\=", then it's an expression.
       */
      if (!(sub[0] == '\\' && sub[1] == '='))
  	sub = regtilde(sub, p_magic);
  
      /*
       * Check for a match on each line.
       */
      line2 = eap->line2;
      for (lnum = eap->line1; lnum <= line2 && !(got_quit
  #if defined(FEAT_EVAL) && defined(FEAT_AUTOCMD)
  		|| aborting()
  #endif
  		); ++lnum)
      {
  	nmatch = vim_regexec_multi(&regmatch, curwin, curbuf, lnum,
  							    (colnr_T)0, NULL);
  	if (nmatch)
  	{
  	    colnr_T	copycol;
  	    colnr_T	matchcol;
  	    colnr_T	prev_matchcol = MAXCOL;
  	    char_u	*new_end, *new_start = NULL;
  	    unsigned	new_start_len = 0;
  	    char_u	*p1;
  	    int		did_sub = FALSE;
  	    int		lastone;
  	    int		len, copy_len, needed_len;
  	    long	nmatch_tl = 0;	/* nr of lines matched below lnum */
  	    int		do_again;	/* do it again after joining lines */
  	    int		skip_match = FALSE;
  	    linenr_T	sub_firstlnum;	/* nr of first sub line */
  
  	    /*
  	     * The new text is build up step by step, to avoid too much
  	     * copying.  There are these pieces:
  	     * sub_firstline	The old text, unmodified.
  	     * copycol		Column in the old text where we started
  	     *			looking for a match; from here old text still
  	     *			needs to be copied to the new text.
  	     * matchcol		Column number of the old text where to look
  	     *			for the next match.  It's just after the
  	     *			previous match or one further.
  	     * prev_matchcol	Column just after the previous match (if any).
  	     *			Mostly equal to matchcol, except for the first
  	     *			match and after skipping an empty match.
  	     * regmatch.*pos	Where the pattern matched in the old text.
  	     * new_start	The new text, all that has been produced so
  	     *			far.
  	     * new_end		The new text, where to append new text.
  	     *
  	     * lnum		The line number where we found the start of
  	     *			the match.  Can be below the line we searched
  	     *			when there is a \n before a \zs in the
  	     *			pattern.
  	     * sub_firstlnum	The line number in the buffer where to look
  	     *			for a match.  Can be different from "lnum"
  	     *			when the pattern or substitute string contains
  	     *			line breaks.
  	     *
  	     * Special situations:
  	     * - When the substitute string contains a line break, the part up
  	     *   to the line break is inserted in the text, but the copy of
  	     *   the original line is kept.  "sub_firstlnum" is adjusted for
  	     *   the inserted lines.
  	     * - When the matched pattern contains a line break, the old line
  	     *   is taken from the line at the end of the pattern.  The lines
  	     *   in the match are deleted later, "sub_firstlnum" is adjusted
  	     *   accordingly.
  	     *
  	     * The new text is built up in new_start[].  It has some extra
  	     * room to avoid using alloc()/free() too often.  new_start_len is
  	     * the length of the allocated memory at new_start.
  	     *
  	     * Make a copy of the old line, so it won't be taken away when
  	     * updating the screen or handling a multi-line match.  The "old_"
  	     * pointers point into this copy.
  	     */
  	    sub_firstlnum = lnum;
  	    copycol = 0;
  	    matchcol = 0;
  
  	    /* At first match, remember current cursor position. */
  	    if (!got_match)
  	    {
  		setpcmark();
  		got_match = TRUE;
  	    }
  
  	    /*
  	     * Loop until nothing more to replace in this line.
  	     * 1. Handle match with empty string.
  	     * 2. If do_ask is set, ask for confirmation.
  	     * 3. substitute the string.
  	     * 4. if do_all is set, find next match
  	     * 5. break if there isn't another match in this line
  	     */
  	    for (;;)
  	    {
  		/* Advance "lnum" to the line where the match starts.  The
  		 * match does not start in the first line when there is a line
  		 * break before \zs. */
  		if (regmatch.startpos[0].lnum > 0)
  		{
  		    lnum += regmatch.startpos[0].lnum;
  		    sub_firstlnum += regmatch.startpos[0].lnum;
  		    nmatch -= regmatch.startpos[0].lnum;
  		    vim_free(sub_firstline);
  		    sub_firstline = NULL;
  		}
  
  		if (sub_firstline == NULL)
  		{
  		    sub_firstline = vim_strsave(ml_get(sub_firstlnum));
  		    if (sub_firstline == NULL)
  		    {
  			vim_free(new_start);
  			goto outofmem;
  		    }
  		}
  
  		/* Save the line number of the last change for the final
  		 * cursor position (just like Vi). */
  		curwin->w_cursor.lnum = lnum;
  		do_again = FALSE;
  
  		/*
  		 * 1. Match empty string does not count, except for first
  		 * match.  This reproduces the strange vi behaviour.
  		 * This also catches endless loops.
  		 */
  		if (matchcol == prev_matchcol
  			&& regmatch.endpos[0].lnum == 0
  			&& matchcol == regmatch.endpos[0].col)
  		{
  		    if (sub_firstline[matchcol] == NUL)
  			/* We already were at the end of the line.  Don't look
  			 * for a match in this line again. */
  			skip_match = TRUE;
  		    else
  		    {
  			 /* search for a match at next column */
  #ifdef FEAT_MBYTE
  			if (has_mbyte)
  			    matchcol += mb_ptr2len(sub_firstline + matchcol);
  			else
  #endif
  			    ++matchcol;
  		    }
  		    goto skip;
  		}
  
  		/* Normally we continue searching for a match just after the
  		 * previous match. */
  		matchcol = regmatch.endpos[0].col;
  		prev_matchcol = matchcol;
  
  		/*
  		 * 2. If do_count is set only increase the counter.
  		 *    If do_ask is set, ask for confirmation.
  		 */
  		if (do_count)
  		{
  		    /* For a multi-line match, put matchcol at the NUL at
  		     * the end of the line and set nmatch to one, so that
  		     * we continue looking for a match on the next line.
  		     * Avoids that ":s/\nB\@=//gc" get stuck. */
  		    if (nmatch > 1)
  		    {
  			matchcol = (colnr_T)STRLEN(sub_firstline);
  			nmatch = 1;
  			skip_match = TRUE;
  		    }
  		    sub_nsubs++;
  		    did_sub = TRUE;
  #ifdef FEAT_EVAL
  		    /* Skip the substitution, unless an expression is used,
  		     * then it is evaluated in the sandbox. */
  		    if (!(sub[0] == '\\' && sub[1] == '='))
  #endif
  			goto skip;
  		}
  
  		if (do_ask)
  		{
  		    int typed = 0;
  
  		    /* change State to CONFIRM, so that the mouse works
  		     * properly */
  		    save_State = State;
  		    State = CONFIRM;
  #ifdef FEAT_MOUSE
  		    setmouse();		/* disable mouse in xterm */
  #endif
  		    curwin->w_cursor.col = regmatch.startpos[0].col;
  
  		    /* When 'cpoptions' contains "u" don't sync undo when
  		     * asking for confirmation. */
  		    if (vim_strchr(p_cpo, CPO_UNDO) != NULL)
  			++no_u_sync;
  
  		    /*
  		     * Loop until 'y', 'n', 'q', CTRL-E or CTRL-Y typed.
  		     */
  		    while (do_ask)
  		    {
  			if (exmode_active)
  			{
  			    char_u	*resp;
  			    colnr_T	sc, ec;
  
  			    print_line_no_prefix(lnum, FALSE, FALSE);
  
  			    getvcol(curwin, &curwin->w_cursor, &sc, NULL, NULL);
  			    curwin->w_cursor.col = regmatch.endpos[0].col - 1;
  			    getvcol(curwin, &curwin->w_cursor, NULL, NULL, &ec);
  			    msg_start();
  			    for (i = 0; i < (long)sc; ++i)
  				msg_putchar(' ');
  			    for ( ; i <= (long)ec; ++i)
  				msg_putchar('^');
  
  			    resp = getexmodeline('?', NULL, 0);
  			    if (resp != NULL)
  			    {
  				typed = *resp;
  				vim_free(resp);
  			    }
  			}
  			else
  			{
  			    char_u *orig_line = NULL;
  			    int    len_change = 0;
  #ifdef FEAT_FOLDING
  			    int save_p_fen = curwin->w_p_fen;
  
  			    curwin->w_p_fen = FALSE;
  #endif
  			    /* Invert the matched string.
  			     * Remove the inversion afterwards. */
  			    temp = RedrawingDisabled;
  			    RedrawingDisabled = 0;
  
  			    if (new_start != NULL)
  			    {
  				/* There already was a substitution, we would
  				 * like to show this to the user.  We cannot
  				 * really update the line, it would change
  				 * what matches.  Temporarily replace the line
  				 * and change it back afterwards. */
  				orig_line = vim_strsave(ml_get(lnum));
  				if (orig_line != NULL)
  				{
  				    char_u *new_line = concat_str(new_start,
  						     sub_firstline + copycol);
  
  				    if (new_line == NULL)
  				    {
  					vim_free(orig_line);
  					orig_line = NULL;
  				    }
  				    else
  				    {
  					/* Position the cursor relative to the
  					 * end of the line, the previous
  					 * substitute may have inserted or
  					 * deleted characters before the
  					 * cursor. */
  					len_change = (int)STRLEN(new_line)
  						     - (int)STRLEN(orig_line);
  					curwin->w_cursor.col += len_change;
  					ml_replace(lnum, new_line, FALSE);
  				    }
  				}
  			    }
  
  			    search_match_lines = regmatch.endpos[0].lnum
  						  - regmatch.startpos[0].lnum;
  			    search_match_endcol = regmatch.endpos[0].col
  								 + len_change;
  			    highlight_match = TRUE;
  
  			    update_topline();
  			    validate_cursor();
  			    update_screen(SOME_VALID);
  			    highlight_match = FALSE;
  			    redraw_later(SOME_VALID);
  
  #ifdef FEAT_FOLDING
  			    curwin->w_p_fen = save_p_fen;
  #endif
  			    if (msg_row == Rows - 1)
  				msg_didout = FALSE;	/* avoid a scroll-up */
  			    msg_starthere();
  			    i = msg_scroll;
  			    msg_scroll = 0;		/* truncate msg when
  							   needed */
  			    msg_no_more = TRUE;
  			    /* write message same highlighting as for
  			     * wait_return */
  			    smsg_attr(hl_attr(HLF_R),
  				    (char_u *)_("replace with %s (y/n/a/q/l/^E/^Y)?"), sub);
  			    msg_no_more = FALSE;
  			    msg_scroll = i;
  			    showruler(TRUE);
  			    windgoto(msg_row, msg_col);
  			    RedrawingDisabled = temp;
  
  #ifdef USE_ON_FLY_SCROLL
  			    dont_scroll = FALSE; /* allow scrolling here */
  #endif
  			    ++no_mapping;	/* don't map this key */
  			    ++allow_keys;	/* allow special keys */
  			    typed = plain_vgetc();
  			    --allow_keys;
  			    --no_mapping;
  
  			    /* clear the question */
  			    msg_didout = FALSE;	/* don't scroll up */
  			    msg_col = 0;
  			    gotocmdline(TRUE);
  
  			    /* restore the line */
  			    if (orig_line != NULL)
  				ml_replace(lnum, orig_line, FALSE);
  			}
  
  			need_wait_return = FALSE; /* no hit-return prompt */
  			if (typed == 'q' || typed == ESC || typed == Ctrl_C
  #ifdef UNIX
  				|| typed == intr_char
  #endif
  				)
  			{
  			    got_quit = TRUE;
  			    break;
  			}
  			if (typed == 'n')
  			    break;
  			if (typed == 'y')
  			    break;
  			if (typed == 'l')
  			{
  			    /* last: replace and then stop */
  			    do_all = FALSE;
  			    line2 = lnum;
  			    break;
  			}
  			if (typed == 'a')
  			{
  			    do_ask = FALSE;
  			    break;
  			}
  #ifdef FEAT_INS_EXPAND
  			if (typed == Ctrl_E)
  			    scrollup_clamp();
  			else if (typed == Ctrl_Y)
  			    scrolldown_clamp();
  #endif
  		    }
  		    State = save_State;
  #ifdef FEAT_MOUSE
  		    setmouse();
  #endif
  		    if (vim_strchr(p_cpo, CPO_UNDO) != NULL)
  			--no_u_sync;
  
  		    if (typed == 'n')
  		    {
  			/* For a multi-line match, put matchcol at the NUL at
  			 * the end of the line and set nmatch to one, so that
  			 * we continue looking for a match on the next line.
  			 * Avoids that ":%s/\nB\@=//gc" and ":%s/\n/,\r/gc"
  			 * get stuck when pressing 'n'. */
  			if (nmatch > 1)
  			{
  			    matchcol = (colnr_T)STRLEN(sub_firstline);
  			    skip_match = TRUE;
  			}
  			goto skip;
  		    }
  		    if (got_quit)
  			goto skip;
  		}
  
  		/* Move the cursor to the start of the match, so that we can
  		 * use "\=col("."). */
  		curwin->w_cursor.col = regmatch.startpos[0].col;
  
  		/*
  		 * 3. substitute the string.
  		 */
  #ifdef FEAT_EVAL
  		if (do_count)
  		{
  		    /* prevent accidentally changing the buffer by a function */
  		    save_ma = curbuf->b_p_ma;
  		    curbuf->b_p_ma = FALSE;
  		    sandbox++;
  		}
  #endif
  		/* get length of substitution part */
  		sublen = vim_regsub_multi(&regmatch,
  				    sub_firstlnum - regmatch.startpos[0].lnum,
  				    sub, sub_firstline, FALSE, p_magic, TRUE);
  #ifdef FEAT_EVAL
  		if (do_count)
  		{
  		    curbuf->b_p_ma = save_ma;
  		    sandbox--;
  		    goto skip;
  		}
  #endif
  
  		/* When the match included the "$" of the last line it may
  		 * go beyond the last line of the buffer. */
  		if (nmatch > curbuf->b_ml.ml_line_count - sub_firstlnum + 1)
  		{
  		    nmatch = curbuf->b_ml.ml_line_count - sub_firstlnum + 1;
  		    skip_match = TRUE;
  		}
  
  		/* Need room for:
  		 * - result so far in new_start (not for first sub in line)
  		 * - original text up to match
  		 * - length of substituted part
  		 * - original text after match
  		 */
  		if (nmatch == 1)
  		    p1 = sub_firstline;
  		else
  		{
  		    p1 = ml_get(sub_firstlnum + nmatch - 1);
  		    nmatch_tl += nmatch - 1;
  		}
  		copy_len = regmatch.startpos[0].col - copycol;
  		needed_len = copy_len + ((unsigned)STRLEN(p1)
  				       - regmatch.endpos[0].col) + sublen + 1;
  		if (new_start == NULL)
  		{
  		    /*
  		     * Get some space for a temporary buffer to do the
  		     * substitution into (and some extra space to avoid
  		     * too many calls to alloc()/free()).
  		     */
  		    new_start_len = needed_len + 50;
  		    if ((new_start = alloc_check(new_start_len)) == NULL)
  			goto outofmem;
  		    *new_start = NUL;
  		    new_end = new_start;
  		}
  		else
  		{
  		    /*
  		     * Check if the temporary buffer is long enough to do the
  		     * substitution into.  If not, make it larger (with a bit
  		     * extra to avoid too many calls to alloc()/free()).
  		     */
  		    len = (unsigned)STRLEN(new_start);
  		    needed_len += len;
  		    if (needed_len > (int)new_start_len)
  		    {
  			new_start_len = needed_len + 50;
  			if ((p1 = alloc_check(new_start_len)) == NULL)
  			{
  			    vim_free(new_start);
  			    goto outofmem;
  			}
  			mch_memmove(p1, new_start, (size_t)(len + 1));
  			vim_free(new_start);
  			new_start = p1;
  		    }
  		    new_end = new_start + len;
  		}
  
  		/*
  		 * copy the text up to the part that matched
  		 */
  		mch_memmove(new_end, sub_firstline + copycol, (size_t)copy_len);
  		new_end += copy_len;
  
  		(void)vim_regsub_multi(&regmatch,
  				    sub_firstlnum - regmatch.startpos[0].lnum,
  					   sub, new_end, TRUE, p_magic, TRUE);
  		sub_nsubs++;
  		did_sub = TRUE;
  
  		/* Move the cursor to the start of the line, to avoid that it
  		 * is beyond the end of the line after the substitution. */
  		curwin->w_cursor.col = 0;
  
  		/* For a multi-line match, make a copy of the last matched
  		 * line and continue in that one. */
  		if (nmatch > 1)
  		{
  		    sub_firstlnum += nmatch - 1;
  		    vim_free(sub_firstline);
  		    sub_firstline = vim_strsave(ml_get(sub_firstlnum));
  		    /* When going beyond the last line, stop substituting. */
  		    if (sub_firstlnum <= line2)
  			do_again = TRUE;
  		    else
  			do_all = FALSE;
  		}
  
  		/* Remember next character to be copied. */
  		copycol = regmatch.endpos[0].col;
  
  		if (skip_match)
  		{
  		    /* Already hit end of the buffer, sub_firstlnum is one
  		     * less than what it ought to be. */
  		    vim_free(sub_firstline);
  		    sub_firstline = vim_strsave((char_u *)"");
  		    copycol = 0;
  		}
  
  		/*
  		 * Now the trick is to replace CTRL-M chars with a real line
  		 * break.  This would make it impossible to insert a CTRL-M in
  		 * the text.  The line break can be avoided by preceding the
  		 * CTRL-M with a backslash.  To be able to insert a backslash,
  		 * they must be doubled in the string and are halved here.
  		 * That is Vi compatible.
  		 */
  		for (p1 = new_end; *p1; ++p1)
  		{
  		    if (p1[0] == '\\' && p1[1] != NUL)  /* remove backslash */
  			STRMOVE(p1, p1 + 1);
  		    else if (*p1 == CAR)
  		    {
  			if (u_inssub(lnum) == OK)   /* prepare for undo */
  			{
  			    *p1 = NUL;		    /* truncate up to the CR */
  			    ml_append(lnum - 1, new_start,
  					(colnr_T)(p1 - new_start + 1), FALSE);
  			    mark_adjust(lnum + 1, (linenr_T)MAXLNUM, 1L, 0L);
  			    if (do_ask)
  				appended_lines(lnum - 1, 1L);
  			    else
  			    {
  				if (first_line == 0)
  				    first_line = lnum;
  				last_line = lnum + 1;
  			    }
  			    /* All line numbers increase. */
  			    ++sub_firstlnum;
  			    ++lnum;
  			    ++line2;
  			    /* move the cursor to the new line, like Vi */
  			    ++curwin->w_cursor.lnum;
  			    /* copy the rest */
  			    STRMOVE(new_start, p1 + 1);
  			    p1 = new_start - 1;
  			}
  		    }
  #ifdef FEAT_MBYTE
  		    else if (has_mbyte)
  			p1 += (*mb_ptr2len)(p1) - 1;
  #endif
  		}
  
  		/*
  		 * 4. If do_all is set, find next match.
  		 * Prevent endless loop with patterns that match empty
  		 * strings, e.g. :s/$/pat/g or :s/[a-z]* /(&)/g.
  		 * But ":s/\n/#/" is OK.
  		 */
  skip:
  		/* We already know that we did the last subst when we are at
  		 * the end of the line, except that a pattern like
  		 * "bar\|\nfoo" may match at the NUL.  "lnum" can be below
  		 * "line2" when there is a \zs in the pattern after a line
  		 * break. */
  		lastone = (skip_match
  			|| got_int
  			|| got_quit
  			|| lnum > line2
  			|| !(do_all || do_again)
  			|| (sub_firstline[matchcol] == NUL && nmatch <= 1
  					 && !re_multiline(regmatch.regprog)));
  		nmatch = -1;
  
  		/*
  		 * Replace the line in the buffer when needed.  This is
  		 * skipped when there are more matches.
  		 * The check for nmatch_tl is needed for when multi-line
  		 * matching must replace the lines before trying to do another
  		 * match, otherwise "\@<=" won't work.
  		 * When the match starts below where we start searching also
  		 * need to replace the line first (using \zs after \n).
  		 */
  		if (lastone
  			|| nmatch_tl > 0
  			|| (nmatch = vim_regexec_multi(&regmatch, curwin,
  							curbuf, sub_firstlnum,
  							 matchcol, NULL)) == 0
  			|| regmatch.startpos[0].lnum > 0)
  		{
  		    if (new_start != NULL)
  		    {
  			/*
  			 * Copy the rest of the line, that didn't match.
  			 * "matchcol" has to be adjusted, we use the end of
  			 * the line as reference, because the substitute may
  			 * have changed the number of characters.  Same for
  			 * "prev_matchcol".
  			 */
  			STRCAT(new_start, sub_firstline + copycol);
  			matchcol = (colnr_T)STRLEN(sub_firstline) - matchcol;
  			prev_matchcol = (colnr_T)STRLEN(sub_firstline)
  							      - prev_matchcol;
  
  			if (u_savesub(lnum) != OK)
  			    break;
  			ml_replace(lnum, new_start, TRUE);
  
  			if (nmatch_tl > 0)
  			{
  			    /*
  			     * Matched lines have now been substituted and are
  			     * useless, delete them.  The part after the match
  			     * has been appended to new_start, we don't need
  			     * it in the buffer.
  			     */
  			    ++lnum;
  			    if (u_savedel(lnum, nmatch_tl) != OK)
  				break;
  			    for (i = 0; i < nmatch_tl; ++i)
  				ml_delete(lnum, (int)FALSE);
  			    mark_adjust(lnum, lnum + nmatch_tl - 1,
  						   (long)MAXLNUM, -nmatch_tl);
  			    if (do_ask)
  				deleted_lines(lnum, nmatch_tl);
  			    --lnum;
  			    line2 -= nmatch_tl; /* nr of lines decreases */
  			    nmatch_tl = 0;
  			}
  
  			/* When asking, undo is saved each time, must also set
  			 * changed flag each time. */
  			if (do_ask)
  			    changed_bytes(lnum, 0);
  			else
  			{
  			    if (first_line == 0)
  				first_line = lnum;
  			    last_line = lnum + 1;
  			}
  
  			sub_firstlnum = lnum;
  			vim_free(sub_firstline);    /* free the temp buffer */
  			sub_firstline = new_start;
  			new_start = NULL;
  			matchcol = (colnr_T)STRLEN(sub_firstline) - matchcol;
  			prev_matchcol = (colnr_T)STRLEN(sub_firstline)
  							      - prev_matchcol;
  			copycol = 0;
  		    }
  		    if (nmatch == -1 && !lastone)
  			nmatch = vim_regexec_multi(&regmatch, curwin, curbuf,
  					       sub_firstlnum, matchcol, NULL);
  
  		    /*
  		     * 5. break if there isn't another match in this line
  		     */
  		    if (nmatch <= 0)
  		    {
  			/* If the match found didn't start where we were
  			 * searching, do the next search in the line where we
  			 * found the match. */
  			if (nmatch == -1)
  			    lnum -= regmatch.startpos[0].lnum;
  			break;
  		    }
  		}
  
  		line_breakcheck();
  	    }
  
  	    if (did_sub)
  		++sub_nlines;
  	    vim_free(new_start);	/* for when substitute was cancelled */
  	    vim_free(sub_firstline);	/* free the copy of the original line */
  	    sub_firstline = NULL;
  	}
  
  	line_breakcheck();
      }
  
      if (first_line != 0)
      {
  	/* Need to subtract the number of added lines from "last_line" to get
  	 * the line number before the change (same as adding the number of
  	 * deleted lines). */
  	i = curbuf->b_ml.ml_line_count - old_line_count;
  	changed_lines(first_line, 0, last_line - i, i);
      }
  
  outofmem:
      vim_free(sub_firstline); /* may have to free allocated copy of the line */
  
      /* ":s/pat//n" doesn't move the cursor */
      if (do_count)
  	curwin->w_cursor = old_cursor;
  
      if (sub_nsubs > start_nsubs)
      {
  	/* Set the '[ and '] marks. */
  	curbuf->b_op_start.lnum = eap->line1;
  	curbuf->b_op_end.lnum = line2;
  	curbuf->b_op_start.col = curbuf->b_op_end.col = 0;
  
  	if (!global_busy)
  	{
  	    if (!do_ask)  /* when interactive leave cursor on the match */
  	    {
  		if (endcolumn)
  		    coladvance((colnr_T)MAXCOL);
  		else
  		    beginline(BL_WHITE | BL_FIX);
  	    }
  	    if (!do_sub_msg(do_count) && do_ask)
  		MSG("");
  	}
  	else
  	    global_need_beginline = TRUE;
  	if (do_print)
  	    print_line(curwin->w_cursor.lnum, do_number, do_list);
      }
      else if (!global_busy)
      {
  	if (got_int)		/* interrupted */
  	    EMSG(_(e_interr));
  	else if (got_match)	/* did find something but nothing substituted */
  	    MSG("");
  	else if (do_error)	/* nothing found */
  	    EMSG2(_(e_patnotf2), get_search_pat());
      }
  
  #ifdef FEAT_FOLDING
      if (do_ask && hasAnyFolding(curwin))
  	/* Cursor position may require updating */
  	changed_window_setting();
  #endif
  
      vim_regfree(regmatch.regprog);
  }
  
  /*
   * Give message for number of substitutions.
   * Can also be used after a ":global" command.
   * Return TRUE if a message was given.
   */
      int
  do_sub_msg(count_only)
      int	    count_only;		/* used 'n' flag for ":s" */
  {
      /*
       * Only report substitutions when:
       * - more than 'report' substitutions
       * - command was typed by user, or number of changed lines > 'report'
       * - giving messages is not disabled by 'lazyredraw'
       */
      if (((sub_nsubs > p_report && (KeyTyped || sub_nlines > 1 || p_report < 1))
  		|| count_only)
  	    && messaging())
      {
  	if (got_int)
  	    STRCPY(msg_buf, _("(Interrupted) "));
  	else
  	    *msg_buf = NUL;
  	if (sub_nsubs == 1)
  	    vim_snprintf_add((char *)msg_buf, sizeof(msg_buf),
  		    "%s", count_only ? _("1 match") : _("1 substitution"));
  	else
  	    vim_snprintf_add((char *)msg_buf, sizeof(msg_buf),
  		    count_only ? _("%ld matches") : _("%ld substitutions"),
  								   sub_nsubs);
  	if (sub_nlines == 1)
  	    vim_snprintf_add((char *)msg_buf, sizeof(msg_buf),
  		    "%s", _(" on 1 line"));
  	else
  	    vim_snprintf_add((char *)msg_buf, sizeof(msg_buf),
  		    _(" on %ld lines"), (long)sub_nlines);
  	if (msg(msg_buf))
  	    /* save message to display it after redraw */
  	    set_keep_msg(msg_buf, 0);
  	return TRUE;
      }
      if (got_int)
      {
  	EMSG(_(e_interr));
  	return TRUE;
      }
      return FALSE;
  }
  
  /*
   * Execute a global command of the form:
   *
   * g/pattern/X : execute X on all lines where pattern matches
   * v/pattern/X : execute X on all lines where pattern does not match
   *
   * where 'X' is an EX command
   *
   * The command character (as well as the trailing slash) is optional, and
   * is assumed to be 'p' if missing.
   *
   * This is implemented in two passes: first we scan the file for the pattern and
   * set a mark for each line that (not) matches. Secondly we execute the command
   * for each line that has a mark. This is required because after deleting
   * lines we do not know where to search for the next match.
   */
      void
  ex_global(eap)
      exarg_T	*eap;
  {
      linenr_T	lnum;		/* line number according to old situation */
      int		ndone = 0;
      int		type;		/* first char of cmd: 'v' or 'g' */
      char_u	*cmd;		/* command argument */
  
      char_u	delim;		/* delimiter, normally '/' */
      char_u	*pat;
      regmmatch_T	regmatch;
      int		match;
      int		which_pat;
  
      if (global_busy)
      {
  	EMSG(_("E147: Cannot do :global recursive"));	/* will increment global_busy */
  	return;
      }
  
      if (eap->forceit)		    /* ":global!" is like ":vglobal" */
  	type = 'v';
      else
  	type = *eap->cmd;
      cmd = eap->arg;
      which_pat = RE_LAST;	    /* default: use last used regexp */
  
      /*
       * undocumented vi feature:
       *	"\/" and "\?": use previous search pattern.
       *		 "\&": use previous substitute pattern.
       */
      if (*cmd == '\\')
      {
  	++cmd;
  	if (vim_strchr((char_u *)"/?&", *cmd) == NULL)
  	{
  	    EMSG(_(e_backslash));
  	    return;
  	}
  	if (*cmd == '&')
  	    which_pat = RE_SUBST;	/* use previous substitute pattern */
  	else
  	    which_pat = RE_SEARCH;	/* use previous search pattern */
  	++cmd;
  	pat = (char_u *)"";
      }
      else if (*cmd == NUL)
      {
  	EMSG(_("E148: Regular expression missing from global"));
  	return;
      }
      else
      {
  	delim = *cmd;		/* get the delimiter */
  	if (delim)
  	    ++cmd;		/* skip delimiter if there is one */
  	pat = cmd;		/* remember start of pattern */
  	cmd = skip_regexp(cmd, delim, p_magic, &eap->arg);
  	if (cmd[0] == delim)		    /* end delimiter found */
  	    *cmd++ = NUL;		    /* replace it with a NUL */
      }
  
  #ifdef FEAT_FKMAP	/* when in Farsi mode, reverse the character flow */
      if (p_altkeymap && curwin->w_p_rl)
  	lrFswap(pat,0);
  #endif
  
      if (search_regcomp(pat, RE_BOTH, which_pat, SEARCH_HIS, &regmatch) == FAIL)
      {
  	EMSG(_(e_invcmd));
  	return;
      }
  
      /*
       * pass 1: set marks for each (not) matching line
       */
      for (lnum = eap->line1; lnum <= eap->line2 && !got_int; ++lnum)
      {
  	/* a match on this line? */
  	match = vim_regexec_multi(&regmatch, curwin, curbuf, lnum,
  							    (colnr_T)0, NULL);
  	if ((type == 'g' && match) || (type == 'v' && !match))
  	{
  	    ml_setmarked(lnum);
  	    ndone++;
  	}
  	line_breakcheck();
      }
  
      /*
       * pass 2: execute the command for each line that has been marked
       */
      if (got_int)
  	MSG(_(e_interr));
      else if (ndone == 0)
      {
  	if (type == 'v')
  	    smsg((char_u *)_("Pattern found in every line: %s"), pat);
  	else
  	    smsg((char_u *)_("Pattern not found: %s"), pat);
      }
      else
  	global_exe(cmd);
  
      ml_clearmarked();	   /* clear rest of the marks */
      vim_regfree(regmatch.regprog);
  }
  
  /*
   * Execute "cmd" on lines marked with ml_setmarked().
   */
      void
  global_exe(cmd)
      char_u	*cmd;
  {
      linenr_T old_lcount;	/* b_ml.ml_line_count before the command */
      buf_T    *old_buf = curbuf;	/* remember what buffer we started in */
      linenr_T lnum;		/* line number according to old situation */
  
      /*
       * Set current position only once for a global command.
       * If global_busy is set, setpcmark() will not do anything.
       * If there is an error, global_busy will be incremented.
       */
      setpcmark();
  
      /* When the command writes a message, don't overwrite the command. */
      msg_didout = TRUE;
  
      sub_nsubs = 0;
      sub_nlines = 0;
      global_need_beginline = FALSE;
      global_busy = 1;
      old_lcount = curbuf->b_ml.ml_line_count;
      while (!got_int && (lnum = ml_firstmarked()) != 0 && global_busy == 1)
      {
  	curwin->w_cursor.lnum = lnum;
  	curwin->w_cursor.col = 0;
  	if (*cmd == NUL || *cmd == '\n')
  	    do_cmdline((char_u *)"p", NULL, NULL, DOCMD_NOWAIT);
  	else
  	    do_cmdline(cmd, NULL, NULL, DOCMD_NOWAIT);
  	ui_breakcheck();
      }
  
      global_busy = 0;
      if (global_need_beginline)
  	beginline(BL_WHITE | BL_FIX);
      else
  	check_cursor();	/* cursor may be beyond the end of the line */
  
      /* the cursor may not have moved in the text but a change in a previous
       * line may move it on the screen */
      changed_line_abv_curs();
  
      /* If it looks like no message was written, allow overwriting the
       * command with the report for number of changes. */
      if (msg_col == 0 && msg_scrolled == 0)
  	msg_didout = FALSE;
  
      /* If substitutes done, report number of substitutes, otherwise report
       * number of extra or deleted lines.
       * Don't report extra or deleted lines in the edge case where the buffer
       * we are in after execution is different from the buffer we started in. */
      if (!do_sub_msg(FALSE) && curbuf == old_buf)
  	msgmore(curbuf->b_ml.ml_line_count - old_lcount);
  }
  
  #ifdef FEAT_VIMINFO
      int
  read_viminfo_sub_string(virp, force)
      vir_T	*virp;
      int		force;
  {
      if (force)
  	vim_free(old_sub);
      if (force || old_sub == NULL)
  	old_sub = viminfo_readstring(virp, 1, TRUE);
      return viminfo_readline(virp);
  }
  
      void
  write_viminfo_sub_string(fp)
      FILE    *fp;
  {
      if (get_viminfo_parameter('/') != 0 && old_sub != NULL)
      {
  	fputs(_("\n# Last Substitute String:\n$"), fp);
  	viminfo_writestring(fp, old_sub);
      }
  }
  #endif /* FEAT_VIMINFO */
  
  #if defined(EXITFREE) || defined(PROTO)
      void
  free_old_sub()
  {
      vim_free(old_sub);
  }
  #endif
  
  #if (defined(FEAT_WINDOWS) && defined(FEAT_QUICKFIX)) || defined(PROTO)
  /*
   * Set up for a tagpreview.
   * Return TRUE when it was created.
   */
      int
  prepare_tagpreview(undo_sync)
      int		undo_sync;	/* sync undo when leaving the window */
  {
      win_T	*wp;
  
  # ifdef FEAT_GUI
      need_mouse_correct = TRUE;
  # endif
  
      /*
       * If there is already a preview window open, use that one.
       */
      if (!curwin->w_p_pvw)
      {
  	for (wp = firstwin; wp != NULL; wp = wp->w_next)
  	    if (wp->w_p_pvw)
  		break;
  	if (wp != NULL)
  	    win_enter(wp, undo_sync);
  	else
  	{
  	    /*
  	     * There is no preview window open yet.  Create one.
  	     */
  	    if (win_split(g_do_tagpreview > 0 ? g_do_tagpreview : 0, 0)
  								      == FAIL)
  		return FALSE;
  	    curwin->w_p_pvw = TRUE;
  	    curwin->w_p_wfh = TRUE;
  	    RESET_BINDING(curwin);	    /* don't take over 'scrollbind'
  					       and 'cursorbind' */
  # ifdef FEAT_DIFF
  	    curwin->w_p_diff = FALSE;	    /* no 'diff' */
  # endif
  # ifdef FEAT_FOLDING
  	    curwin->w_p_fdc = 0;	    /* no 'foldcolumn' */
  # endif
  	    return TRUE;
  	}
      }
      return FALSE;
  }
  
  #endif
  
  
  /*
   * ":help": open a read-only window on a help file
   */
      void
  ex_help(eap)
      exarg_T	*eap;
  {
      char_u	*arg;
      char_u	*tag;
      FILE	*helpfd;	/* file descriptor of help file */
      int		n;
      int		i;
  #ifdef FEAT_WINDOWS
      win_T	*wp;
  #endif
      int		num_matches;
      char_u	**matches;
      char_u	*p;
      int		empty_fnum = 0;
      int		alt_fnum = 0;
      buf_T	*buf;
  #ifdef FEAT_MULTI_LANG
      int		len;
      char_u	*lang;
  #endif
  #ifdef FEAT_FOLDING
      int		old_KeyTyped = KeyTyped;
  #endif
  
      if (eap != NULL)
      {
  	/*
  	 * A ":help" command ends at the first LF, or at a '|' that is
  	 * followed by some text.  Set nextcmd to the following command.
  	 */
  	for (arg = eap->arg; *arg; ++arg)
  	{
  	    if (*arg == '\n' || *arg == '\r'
  		    || (*arg == '|' && arg[1] != NUL && arg[1] != '|'))
  	    {
  		*arg++ = NUL;
  		eap->nextcmd = arg;
  		break;
  	    }
  	}
  	arg = eap->arg;
  
  	if (eap->forceit && *arg == NUL && !curbuf->b_help)
  	{
  	    EMSG(_("E478: Don't panic!"));
  	    return;
  	}
  
  	if (eap->skip)	    /* not executing commands */
  	    return;
      }
      else
  	arg = (char_u *)"";
  
      /* remove trailing blanks */
      p = arg + STRLEN(arg) - 1;
      while (p > arg && vim_iswhite(*p) && p[-1] != '\\')
  	*p-- = NUL;
  
  #ifdef FEAT_MULTI_LANG
      /* Check for a specified language */
      lang = check_help_lang(arg);
  #endif
  
      /* When no argument given go to the index. */
      if (*arg == NUL)
  	arg = (char_u *)"help.txt";
  
      /*
       * Check if there is a match for the argument.
       */
      n = find_help_tags(arg, &num_matches, &matches,
  						 eap != NULL && eap->forceit);
  
      i = 0;
  #ifdef FEAT_MULTI_LANG
      if (n != FAIL && lang != NULL)
  	/* Find first item with the requested language. */
  	for (i = 0; i < num_matches; ++i)
  	{
  	    len = (int)STRLEN(matches[i]);
  	    if (len > 3 && matches[i][len - 3] == '@'
  				  && STRICMP(matches[i] + len - 2, lang) == 0)
  		break;
  	}
  #endif
      if (i >= num_matches || n == FAIL)
      {
  #ifdef FEAT_MULTI_LANG
  	if (lang != NULL)
  	    EMSG3(_("E661: Sorry, no '%s' help for %s"), lang, arg);
  	else
  #endif
  	    EMSG2(_("E149: Sorry, no help for %s"), arg);
  	if (n != FAIL)
  	    FreeWild(num_matches, matches);
  	return;
      }
  
      /* The first match (in the requested language) is the best match. */
      tag = vim_strsave(matches[i]);
      FreeWild(num_matches, matches);
  
  #ifdef FEAT_GUI
      need_mouse_correct = TRUE;
  #endif
  
      /*
       * Re-use an existing help window or open a new one.
       * Always open a new one for ":tab help".
       */
      if (!curwin->w_buffer->b_help
  #ifdef FEAT_WINDOWS
  	    || cmdmod.tab != 0
  #endif
  	    )
      {
  #ifdef FEAT_WINDOWS
  	if (cmdmod.tab != 0)
  	    wp = NULL;
  	else
  	    for (wp = firstwin; wp != NULL; wp = wp->w_next)
  		if (wp->w_buffer != NULL && wp->w_buffer->b_help)
  		    break;
  	if (wp != NULL && wp->w_buffer->b_nwindows > 0)
  	    win_enter(wp, TRUE);
  	else
  #endif
  	{
  	    /*
  	     * There is no help window yet.
  	     * Try to open the file specified by the "helpfile" option.
  	     */
  	    if ((helpfd = mch_fopen((char *)p_hf, READBIN)) == NULL)
  	    {
  		smsg((char_u *)_("Sorry, help file \"%s\" not found"), p_hf);
  		goto erret;
  	    }
  	    fclose(helpfd);
  
  #ifdef FEAT_WINDOWS
  	    /* Split off help window; put it at far top if no position
  	     * specified, the current window is vertically split and
  	     * narrow. */
  	    n = WSP_HELP;
  # ifdef FEAT_VERTSPLIT
  	    if (cmdmod.split == 0 && curwin->w_width != Columns
  						  && curwin->w_width < 80)
  		n |= WSP_TOP;
  # endif
  	    if (win_split(0, n) == FAIL)
  		goto erret;
  #else
  	    /* use current window */
  	    if (!can_abandon(curbuf, FALSE))
  		goto erret;
  #endif
  
  #ifdef FEAT_WINDOWS
  	    if (curwin->w_height < p_hh)
  		win_setheight((int)p_hh);
  #endif
  
  	    /*
  	     * Open help file (do_ecmd() will set b_help flag, readfile() will
  	     * set b_p_ro flag).
  	     * Set the alternate file to the previously edited file.
  	     */
  	    alt_fnum = curbuf->b_fnum;
  	    (void)do_ecmd(0, NULL, NULL, NULL, ECMD_LASTL,
  			  ECMD_HIDE + ECMD_SET_HELP,
  #ifdef FEAT_WINDOWS
  			  NULL  /* buffer is still open, don't store info */
  #else
  			  curwin
  #endif
  		    );
  	    if (!cmdmod.keepalt)
  		curwin->w_alt_fnum = alt_fnum;
  	    empty_fnum = curbuf->b_fnum;
  	}
      }
  
      if (!p_im)
  	restart_edit = 0;	    /* don't want insert mode in help file */
  
  #ifdef FEAT_FOLDING
      /* Restore KeyTyped, setting 'filetype=help' may reset it.
       * It is needed for do_tag top open folds under the cursor. */
      KeyTyped = old_KeyTyped;
  #endif
  
      if (tag != NULL)
  	do_tag(tag, DT_HELP, 1, FALSE, TRUE);
  
      /* Delete the empty buffer if we're not using it.  Careful: autocommands
       * may have jumped to another window, check that the buffer is not in a
       * window. */
      if (empty_fnum != 0 && curbuf->b_fnum != empty_fnum)
      {
  	buf = buflist_findnr(empty_fnum);
  	if (buf != NULL && buf->b_nwindows == 0)
  	    wipe_buffer(buf, TRUE);
      }
  
      /* keep the previous alternate file */
      if (alt_fnum != 0 && curwin->w_alt_fnum == empty_fnum && !cmdmod.keepalt)
  	curwin->w_alt_fnum = alt_fnum;
  
  erret:
      vim_free(tag);
  }
  
  
  #if defined(FEAT_MULTI_LANG) || defined(PROTO)
  /*
   * In an argument search for a language specifiers in the form "@xx".
   * Changes the "@" to NUL if found, and returns a pointer to "xx".
   * Returns NULL if not found.
   */
      char_u *
  check_help_lang(arg)
      char_u *arg;
  {
      int len = (int)STRLEN(arg);
  
      if (len >= 3 && arg[len - 3] == '@' && ASCII_ISALPHA(arg[len - 2])
  					       && ASCII_ISALPHA(arg[len - 1]))
      {
  	arg[len - 3] = NUL;		/* remove the '@' */
  	return arg + len - 2;
      }
      return NULL;
  }
  #endif
  
  /*
   * Return a heuristic indicating how well the given string matches.  The
   * smaller the number, the better the match.  This is the order of priorities,
   * from best match to worst match:
   *	- Match with least alpha-numeric characters is better.
   *	- Match with least total characters is better.
   *	- Match towards the start is better.
   *	- Match starting with "+" is worse (feature instead of command)
   * Assumption is made that the matched_string passed has already been found to
   * match some string for which help is requested.  webb.
   */
      int
  help_heuristic(matched_string, offset, wrong_case)
      char_u	*matched_string;
      int		offset;			/* offset for match */
      int		wrong_case;		/* no matching case */
  {
      int		num_letters;
      char_u	*p;
  
      num_letters = 0;
      for (p = matched_string; *p; p++)
  	if (ASCII_ISALNUM(*p))
  	    num_letters++;
  
      /*
       * Multiply the number of letters by 100 to give it a much bigger
       * weighting than the number of characters.
       * If there only is a match while ignoring case, add 5000.
       * If the match starts in the middle of a word, add 10000 to put it
       * somewhere in the last half.
       * If the match is more than 2 chars from the start, multiply by 200 to
       * put it after matches at the start.
       */
      if (ASCII_ISALNUM(matched_string[offset]) && offset > 0
  				 && ASCII_ISALNUM(matched_string[offset - 1]))
  	offset += 10000;
      else if (offset > 2)
  	offset *= 200;
      if (wrong_case)
  	offset += 5000;
      /* Features are less interesting than the subjects themselves, but "+"
       * alone is not a feature. */
      if (matched_string[0] == '+' && matched_string[1] != NUL)
  	offset += 100;
      return (int)(100 * num_letters + STRLEN(matched_string) + offset);
  }
  
  /*
   * Compare functions for qsort() below, that checks the help heuristics number
   * that has been put after the tagname by find_tags().
   */
      static int
  #ifdef __BORLANDC__
  _RTLENTRYF
  #endif
  help_compare(s1, s2)
      const void	*s1;
      const void	*s2;
  {
      char    *p1;
      char    *p2;
  
      p1 = *(char **)s1 + strlen(*(char **)s1) + 1;
      p2 = *(char **)s2 + strlen(*(char **)s2) + 1;
      return strcmp(p1, p2);
  }
  
  /*
   * Find all help tags matching "arg", sort them and return in matches[], with
   * the number of matches in num_matches.
   * The matches will be sorted with a "best" match algorithm.
   * When "keep_lang" is TRUE try keeping the language of the current buffer.
   */
      int
  find_help_tags(arg, num_matches, matches, keep_lang)
      char_u	*arg;
      int		*num_matches;
      char_u	***matches;
      int		keep_lang;
  {
      char_u	*s, *d;
      int		i;
      static char *(mtable[]) = {"*", "g*", "[*", "]*", ":*",
  			       "/*", "/\\*", "\"*", "**",
  			       "cpo-*", "/\\(\\)", "/\\%(\\)",
  			       "?", ":?", "?<CR>", "g?", "g?g?", "g??", "z?",
  			       "/\\?", "/\\z(\\)", "\\=", ":s\\=",
  			       "[count]", "[quotex]", "[range]",
  			       "[pattern]", "\\|", "\\%$"};
      static char *(rtable[]) = {"star", "gstar", "[star", "]star", ":star",
  			       "/star", "/\\\\star", "quotestar", "starstar",
  			       "cpo-star", "/\\\\(\\\\)", "/\\\\%(\\\\)",
  			       "?", ":?", "?<CR>", "g?", "g?g?", "g??", "z?",
  			       "/\\\\?", "/\\\\z(\\\\)", "\\\\=", ":s\\\\=",
  			       "\\[count]", "\\[quotex]", "\\[range]",
  			       "\\[pattern]", "\\\\bar", "/\\\\%\\$"};
      int flags;
  
      d = IObuff;		    /* assume IObuff is long enough! */
  
      /*
       * Recognize a few exceptions to the rule.	Some strings that contain '*'
       * with "star".  Otherwise '*' is recognized as a wildcard.
       */
      for (i = (int)(sizeof(mtable) / sizeof(char *)); --i >= 0; )
  	if (STRCMP(arg, mtable[i]) == 0)
  	{
  	    STRCPY(d, rtable[i]);
  	    break;
  	}
  
      if (i < 0)	/* no match in table */
      {
  	/* Replace "\S" with "/\\S", etc.  Otherwise every tag is matched.
  	 * Also replace "\%^" and "\%(", they match every tag too.
  	 * Also "\zs", "\z1", etc.
  	 * Also "\@<", "\@=", "\@<=", etc.
  	 * And also "\_$" and "\_^". */
  	if (arg[0] == '\\'
  		&& ((arg[1] != NUL && arg[2] == NUL)
  		    || (vim_strchr((char_u *)"%_z@", arg[1]) != NULL
  							   && arg[2] != NUL)))
  	{
  	    STRCPY(d, "/\\\\");
  	    STRCPY(d + 3, arg + 1);
  	    /* Check for "/\\_$", should be "/\\_\$" */
  	    if (d[3] == '_' && d[4] == '$')
  		STRCPY(d + 4, "\\$");
  	}
  	else
  	{
  	  /* Replace:
  	   * "[:...:]" with "\[:...:]"
  	   * "[++...]" with "\[++...]"
  	   * "\{" with "\\{"
  	   */
  	    if ((arg[0] == '[' && (arg[1] == ':'
  			 || (arg[1] == '+' && arg[2] == '+')))
  		    || (arg[0] == '\\' && arg[1] == '{'))
  	      *d++ = '\\';
  
  	  for (s = arg; *s; ++s)
  	  {
  	    /*
  	     * Replace "|" with "bar" and '"' with "quote" to match the name of
  	     * the tags for these commands.
  	     * Replace "*" with ".*" and "?" with "." to match command line
  	     * completion.
  	     * Insert a backslash before '~', '$' and '.' to avoid their
  	     * special meaning.
  	     */
  	    if (d - IObuff > IOSIZE - 10)	/* getting too long!? */
  		break;
  	    switch (*s)
  	    {
  		case '|':   STRCPY(d, "bar");
  			    d += 3;
  			    continue;
  		case '"':   STRCPY(d, "quote");
  			    d += 5;
  			    continue;
  		case '*':   *d++ = '.';
  			    break;
  		case '?':   *d++ = '.';
  			    continue;
  		case '$':
  		case '.':
  		case '~':   *d++ = '\\';
  			    break;
  	    }
  
  	    /*
  	     * Replace "^x" by "CTRL-X". Don't do this for "^_" to make
  	     * ":help i_^_CTRL-D" work.
  	     * Insert '-' before and after "CTRL-X" when applicable.
  	     */
  	    if (*s < ' ' || (*s == '^' && s[1] && (ASCII_ISALPHA(s[1])
  			   || vim_strchr((char_u *)"?@[\\]^", s[1]) != NULL)))
  	    {
  		if (d > IObuff && d[-1] != '_' && d[-1] != '\\')
  		    *d++ = '_';		/* prepend a '_' to make x_CTRL-x */
  		STRCPY(d, "CTRL-");
  		d += 5;
  		if (*s < ' ')
  		{
  #ifdef EBCDIC
  		    *d++ = CtrlChar(*s);
  #else
  		    *d++ = *s + '@';
  #endif
  		    if (d[-1] == '\\')
  			*d++ = '\\';	/* double a backslash */
  		}
  		else
  		    *d++ = *++s;
  		if (s[1] != NUL && s[1] != '_')
  		    *d++ = '_';		/* append a '_' */
  		continue;
  	    }
  	    else if (*s == '^')		/* "^" or "CTRL-^" or "^_" */
  		*d++ = '\\';
  
  	    /*
  	     * Insert a backslash before a backslash after a slash, for search
  	     * pattern tags: "/\|" --> "/\\|".
  	     */
  	    else if (s[0] == '\\' && s[1] != '\\'
  					       && *arg == '/' && s == arg + 1)
  		*d++ = '\\';
  
  	    /* "CTRL-\_" -> "CTRL-\\_" to avoid the special meaning of "\_" in
  	     * "CTRL-\_CTRL-N" */
  	    if (STRNICMP(s, "CTRL-\\_", 7) == 0)
  	    {
  		STRCPY(d, "CTRL-\\\\");
  		d += 7;
  		s += 6;
  	    }
  
  	    *d++ = *s;
  
  	    /*
  	     * If tag starts with ', toss everything after a second '. Fixes
  	     * CTRL-] on 'option'. (would include the trailing '.').
  	     */
  	    if (*s == '\'' && s > arg && *arg == '\'')
  		break;
  	  }
  	  *d = NUL;
  
  	  if (*IObuff == '`')
  	  {
  	      if (d > IObuff + 2 && d[-1] == '`')
  	      {
  		  /* remove the backticks from `command` */
  		  mch_memmove(IObuff, IObuff + 1, STRLEN(IObuff));
  		  d[-2] = NUL;
  	      }
  	      else if (d > IObuff + 3 && d[-2] == '`' && d[-1] == ',')
  	      {
  		  /* remove the backticks and comma from `command`, */
  		  mch_memmove(IObuff, IObuff + 1, STRLEN(IObuff));
  		  d[-3] = NUL;
  	      }
  	      else if (d > IObuff + 4 && d[-3] == '`'
  					     && d[-2] == '\\' && d[-1] == '.')
  	      {
  		  /* remove the backticks and dot from `command`\. */
  		  mch_memmove(IObuff, IObuff + 1, STRLEN(IObuff));
  		  d[-4] = NUL;
  	      }
  	  }
  	}
      }
  
      *matches = (char_u **)"";
      *num_matches = 0;
      flags = TAG_HELP | TAG_REGEXP | TAG_NAMES | TAG_VERBOSE;
      if (keep_lang)
  	flags |= TAG_KEEP_LANG;
      if (find_tags(IObuff, num_matches, matches, flags, (int)MAXCOL, NULL) == OK
  	    && *num_matches > 0)
      {
  	/* Sort the matches found on the heuristic number that is after the
  	 * tag name. */
  	qsort((void *)*matches, (size_t)*num_matches,
  					      sizeof(char_u *), help_compare);
  	/* Delete more than TAG_MANY to reduce the size of the listing. */
  	while (*num_matches > TAG_MANY)
  	    vim_free((*matches)[--*num_matches]);
      }
      return OK;
  }
  
  /*
   * After reading a help file: May cleanup a help buffer when syntax
   * highlighting is not used.
   */
      void
  fix_help_buffer()
  {
      linenr_T	lnum;
      char_u	*line;
      int		in_example = FALSE;
      int		len;
      char_u	*fname;
      char_u	*p;
      char_u	*rt;
      int		mustfree;
  
      /* set filetype to "help". */
      set_option_value((char_u *)"ft", 0L, (char_u *)"help", OPT_LOCAL);
  
  #ifdef FEAT_SYN_HL
      if (!syntax_present(curwin))
  #endif
      {
  	for (lnum = 1; lnum <= curbuf->b_ml.ml_line_count; ++lnum)
  	{
  	    line = ml_get_buf(curbuf, lnum, FALSE);
  	    len = (int)STRLEN(line);
  	    if (in_example && len > 0 && !vim_iswhite(line[0]))
  	    {
  		/* End of example: non-white or '<' in first column. */
  		if (line[0] == '<')
  		{
  		    /* blank-out a '<' in the first column */
  		    line = ml_get_buf(curbuf, lnum, TRUE);
  		    line[0] = ' ';
  		}
  		in_example = FALSE;
  	    }
  	    if (!in_example && len > 0)
  	    {
  		if (line[len - 1] == '>' && (len == 1 || line[len - 2] == ' '))
  		{
  		    /* blank-out a '>' in the last column (start of example) */
  		    line = ml_get_buf(curbuf, lnum, TRUE);
  		    line[len - 1] = ' ';
  		    in_example = TRUE;
  		}
  		else if (line[len - 1] == '~')
  		{
  		    /* blank-out a '~' at the end of line (header marker) */
  		    line = ml_get_buf(curbuf, lnum, TRUE);
  		    line[len - 1] = ' ';
  		}
  	    }
  	}
      }
  
      /*
       * In the "help.txt" and "help.abx" file, add the locally added help
       * files.  This uses the very first line in the help file.
       */
      fname = gettail(curbuf->b_fname);
      if (fnamecmp(fname, "help.txt") == 0
  #ifdef FEAT_MULTI_LANG
  	|| (fnamencmp(fname, "help.", 5) == 0
  	    && ASCII_ISALPHA(fname[5])
  	    && ASCII_ISALPHA(fname[6])
  	    && TOLOWER_ASC(fname[7]) == 'x'
  	    && fname[8] == NUL)
  #endif
  	)
      {
  	for (lnum = 1; lnum < curbuf->b_ml.ml_line_count; ++lnum)
  	{
  	    line = ml_get_buf(curbuf, lnum, FALSE);
  	    if (strstr((char *)line, "*local-additions*") == NULL)
  		continue;
  
  	    /* Go through all directories in 'runtimepath', skipping
  	     * $VIMRUNTIME. */
  	    p = p_rtp;
  	    while (*p != NUL)
  	    {
  		copy_option_part(&p, NameBuff, MAXPATHL, ",");
  		mustfree = FALSE;
  		rt = vim_getenv((char_u *)"VIMRUNTIME", &mustfree);
  		if (fullpathcmp(rt, NameBuff, FALSE) != FPC_SAME)
  		{
  		    int		fcount;
  		    char_u	**fnames;
  		    FILE	*fd;
  		    char_u	*s;
  		    int		fi;
  #ifdef FEAT_MBYTE
  		    vimconv_T	vc;
  		    char_u	*cp;
  #endif
  
  		    /* Find all "doc/ *.txt" files in this directory. */
  		    add_pathsep(NameBuff);
  #ifdef FEAT_MULTI_LANG
  		    STRCAT(NameBuff, "doc/*.??[tx]");
  #else
  		    STRCAT(NameBuff, "doc/*.txt");
  #endif
  		    if (gen_expand_wildcards(1, &NameBuff, &fcount,
  					 &fnames, EW_FILE|EW_SILENT) == OK
  			    && fcount > 0)
  		    {
  #ifdef FEAT_MULTI_LANG
  			int	i1;
  			int	i2;
  			char_u	*f1;
  			char_u	*f2;
  			char_u	*t1;
  			char_u	*e1;
  			char_u	*e2;
  
  			/* If foo.abx is found use it instead of foo.txt in
  			 * the same directory. */
  			for (i1 = 0; i1 < fcount; ++i1)
  			{
  			    for (i2 = 0; i2 < fcount; ++i2)
  			    {
  				if (i1 == i2)
  				    continue;
  				if (fnames[i1] == NULL || fnames[i2] == NULL)
  				    continue;
  				f1 = fnames[i1];
  				f2 = fnames[i2];
  				t1 = gettail(f1);
  				if (fnamencmp(f1, f2, t1 - f1) != 0)
  				    continue;
  				e1 = vim_strrchr(t1, '.');
  				e2 = vim_strrchr(gettail(f2), '.');
  				if (e1 == NUL || e2 == NUL)
  				    continue;
  				if (fnamecmp(e1, ".txt") != 0
  				    && fnamecmp(e1, fname + 4) != 0)
  				{
  				    /* Not .txt and not .abx, remove it. */
  				    vim_free(fnames[i1]);
  				    fnames[i1] = NULL;
  				    continue;
  				}
  				if (fnamencmp(f1, f2, e1 - f1) != 0)
  				    continue;
  				if (fnamecmp(e1, ".txt") == 0
  				    && fnamecmp(e2, fname + 4) == 0)
  				{
  				    /* use .abx instead of .txt */
  				    vim_free(fnames[i1]);
  				    fnames[i1] = NULL;
  				}
  			    }
  			}
  #endif
  			for (fi = 0; fi < fcount; ++fi)
  			{
  			    if (fnames[fi] == NULL)
  				continue;
  			    fd = mch_fopen((char *)fnames[fi], "r");
  			    if (fd != NULL)
  			    {
  				vim_fgets(IObuff, IOSIZE, fd);
  				if (IObuff[0] == '*'
  					&& (s = vim_strchr(IObuff + 1, '*'))
  								  != NULL)
  				{
  #ifdef FEAT_MBYTE
  				    int	this_utf = MAYBE;
  #endif
  				    /* Change tag definition to a
  				     * reference and remove <CR>/<NL>. */
  				    IObuff[0] = '|';
  				    *s = '|';
  				    while (*s != NUL)
  				    {
  					if (*s == '\r' || *s == '\n')
  					    *s = NUL;
  #ifdef FEAT_MBYTE
  					/* The text is utf-8 when a byte
  					 * above 127 is found and no
  					 * illegal byte sequence is found.
  					 */
  					if (*s >= 0x80 && this_utf != FALSE)
  					{
  					    int	l;
  
  					    this_utf = TRUE;
  					    l = utf_ptr2len(s);
  					    if (l == 1)
  						this_utf = FALSE;
  					    s += l - 1;
  					}
  #endif
  					++s;
  				    }
  #ifdef FEAT_MBYTE
  				    /* The help file is latin1 or utf-8;
  				     * conversion to the current
  				     * 'encoding' may be required. */
  				    vc.vc_type = CONV_NONE;
  				    convert_setup(&vc, (char_u *)(
  						this_utf == TRUE ? "utf-8"
  						      : "latin1"), p_enc);
  				    if (vc.vc_type == CONV_NONE)
  					/* No conversion needed. */
  					cp = IObuff;
  				    else
  				    {
  					/* Do the conversion.  If it fails
  					 * use the unconverted text. */
  					cp = string_convert(&vc, IObuff,
  								    NULL);
  					if (cp == NULL)
  					    cp = IObuff;
  				    }
  				    convert_setup(&vc, NULL, NULL);
  
  				    ml_append(lnum, cp, (colnr_T)0, FALSE);
  				    if (cp != IObuff)
  					vim_free(cp);
  #else
  				    ml_append(lnum, IObuff, (colnr_T)0,
  								   FALSE);
  #endif
  				    ++lnum;
  				}
  				fclose(fd);
  			    }
  			}
  			FreeWild(fcount, fnames);
  		    }
  		}
  		if (mustfree)
  		    vim_free(rt);
  	    }
  	    break;
  	}
      }
  }
  
  /*
   * ":exusage"
   */
      void
  ex_exusage(eap)
      exarg_T	*eap UNUSED;
  {
      do_cmdline_cmd((char_u *)"help ex-cmd-index");
  }
  
  /*
   * ":viusage"
   */
      void
  ex_viusage(eap)
      exarg_T	*eap UNUSED;
  {
      do_cmdline_cmd((char_u *)"help normal-index");
  }
  
  #if defined(FEAT_EX_EXTRA) || defined(PROTO)
  static void helptags_one __ARGS((char_u *dir, char_u *ext, char_u *lang, int add_help_tags));
  
  /*
   * ":helptags"
   */
      void
  ex_helptags(eap)
      exarg_T	*eap;
  {
      garray_T	ga;
      int		i, j;
      int		len;
  #ifdef FEAT_MULTI_LANG
      char_u	lang[2];
  #endif
      expand_T	xpc;
      char_u	*dirname;
      char_u	ext[5];
      char_u	fname[8];
      int		filecount;
      char_u	**files;
      int		add_help_tags = FALSE;
  
      /* Check for ":helptags ++t {dir}". */
      if (STRNCMP(eap->arg, "++t", 3) == 0 && vim_iswhite(eap->arg[3]))
      {
  	add_help_tags = TRUE;
  	eap->arg = skipwhite(eap->arg + 3);
      }
  
      ExpandInit(&xpc);
      xpc.xp_context = EXPAND_DIRECTORIES;
      dirname = ExpandOne(&xpc, eap->arg, NULL,
  			    WILD_LIST_NOTFOUND|WILD_SILENT, WILD_EXPAND_FREE);
      if (dirname == NULL || !mch_isdir(dirname))
      {
  	EMSG2(_("E150: Not a directory: %s"), eap->arg);
  	return;
      }
  
  #ifdef FEAT_MULTI_LANG
      /* Get a list of all files in the help directory and in subdirectories. */
      STRCPY(NameBuff, dirname);
      add_pathsep(NameBuff);
      STRCAT(NameBuff, "**");
      if (gen_expand_wildcards(1, &NameBuff, &filecount, &files,
  						    EW_FILE|EW_SILENT) == FAIL
  	    || filecount == 0)
      {
  	EMSG2("E151: No match: %s", NameBuff);
  	vim_free(dirname);
  	return;
      }
  
      /* Go over all files in the directory to find out what languages are
       * present. */
      ga_init2(&ga, 1, 10);
      for (i = 0; i < filecount; ++i)
      {
  	len = (int)STRLEN(files[i]);
  	if (len > 4)
  	{
  	    if (STRICMP(files[i] + len - 4, ".txt") == 0)
  	    {
  		/* ".txt" -> language "en" */
  		lang[0] = 'e';
  		lang[1] = 'n';
  	    }
  	    else if (files[i][len - 4] == '.'
  		    && ASCII_ISALPHA(files[i][len - 3])
  		    && ASCII_ISALPHA(files[i][len - 2])
  		    && TOLOWER_ASC(files[i][len - 1]) == 'x')
  	    {
  		/* ".abx" -> language "ab" */
  		lang[0] = TOLOWER_ASC(files[i][len - 3]);
  		lang[1] = TOLOWER_ASC(files[i][len - 2]);
  	    }
  	    else
  		continue;
  
  	    /* Did we find this language already? */
  	    for (j = 0; j < ga.ga_len; j += 2)
  		if (STRNCMP(lang, ((char_u *)ga.ga_data) + j, 2) == 0)
  		    break;
  	    if (j == ga.ga_len)
  	    {
  		/* New language, add it. */
  		if (ga_grow(&ga, 2) == FAIL)
  		    break;
  		((char_u *)ga.ga_data)[ga.ga_len++] = lang[0];
  		((char_u *)ga.ga_data)[ga.ga_len++] = lang[1];
  	    }
  	}
      }
  
      /*
       * Loop over the found languages to generate a tags file for each one.
       */
      for (j = 0; j < ga.ga_len; j += 2)
      {
  	STRCPY(fname, "tags-xx");
  	fname[5] = ((char_u *)ga.ga_data)[j];
  	fname[6] = ((char_u *)ga.ga_data)[j + 1];
  	if (fname[5] == 'e' && fname[6] == 'n')
  	{
  	    /* English is an exception: use ".txt" and "tags". */
  	    fname[4] = NUL;
  	    STRCPY(ext, ".txt");
  	}
  	else
  	{
  	    /* Language "ab" uses ".abx" and "tags-ab". */
  	    STRCPY(ext, ".xxx");
  	    ext[1] = fname[5];
  	    ext[2] = fname[6];
  	}
  	helptags_one(dirname, ext, fname, add_help_tags);
      }
  
      ga_clear(&ga);
      FreeWild(filecount, files);
  
  #else
      /* No language support, just use "*.txt" and "tags". */
      helptags_one(dirname, (char_u *)".txt", (char_u *)"tags", add_help_tags);
  #endif
      vim_free(dirname);
  }
  
      static void
  helptags_one(dir, ext, tagfname, add_help_tags)
      char_u	*dir;		/* doc directory */
      char_u	*ext;		/* suffix, ".txt", ".itx", ".frx", etc. */
      char_u	*tagfname;	/* "tags" for English, "tags-fr" for French. */
      int		add_help_tags;	/* add "help-tags" tag */
  {
      FILE	*fd_tags;
      FILE	*fd;
      garray_T	ga;
      int		filecount;
      char_u	**files;
      char_u	*p1, *p2;
      int		fi;
      char_u	*s;
      int		i;
      char_u	*fname;
      int		dirlen;
  # ifdef FEAT_MBYTE
      int		utf8 = MAYBE;
      int		this_utf8;
      int		firstline;
      int		mix = FALSE;	/* detected mixed encodings */
  # endif
  
      /*
       * Find all *.txt files.
       */
      dirlen = (int)STRLEN(dir);
      STRCPY(NameBuff, dir);
      STRCAT(NameBuff, "/**/*");
      STRCAT(NameBuff, ext);
      if (gen_expand_wildcards(1, &NameBuff, &filecount, &files,
  						    EW_FILE|EW_SILENT) == FAIL
  	    || filecount == 0)
      {
  	if (!got_int)
  	    EMSG2("E151: No match: %s", NameBuff);
  	return;
      }
  
      /*
       * Open the tags file for writing.
       * Do this before scanning through all the files.
       */
      STRCPY(NameBuff, dir);
      add_pathsep(NameBuff);
      STRCAT(NameBuff, tagfname);
      fd_tags = mch_fopen((char *)NameBuff, "w");
      if (fd_tags == NULL)
      {
  	EMSG2(_("E152: Cannot open %s for writing"), NameBuff);
  	FreeWild(filecount, files);
  	return;
      }
  
      /*
       * If using the "++t" argument or generating tags for "$VIMRUNTIME/doc"
       * add the "help-tags" tag.
       */
      ga_init2(&ga, (int)sizeof(char_u *), 100);
      if (add_help_tags || fullpathcmp((char_u *)"$VIMRUNTIME/doc",
  						      dir, FALSE) == FPC_SAME)
      {
  	if (ga_grow(&ga, 1) == FAIL)
  	    got_int = TRUE;
  	else
  	{
  	    s = alloc(18 + (unsigned)STRLEN(tagfname));
  	    if (s == NULL)
  		got_int = TRUE;
  	    else
  	    {
  		sprintf((char *)s, "help-tags\t%s\t1\n", tagfname);
  		((char_u **)ga.ga_data)[ga.ga_len] = s;
  		++ga.ga_len;
  	    }
  	}
      }
  
      /*
       * Go over all the files and extract the tags.
       */
      for (fi = 0; fi < filecount && !got_int; ++fi)
      {
  	fd = mch_fopen((char *)files[fi], "r");
  	if (fd == NULL)
  	{
  	    EMSG2(_("E153: Unable to open %s for reading"), files[fi]);
  	    continue;
  	}
  	fname = files[fi] + dirlen + 1;
  
  # ifdef FEAT_MBYTE
  	firstline = TRUE;
  # endif
  	while (!vim_fgets(IObuff, IOSIZE, fd) && !got_int)
  	{
  # ifdef FEAT_MBYTE
  	    if (firstline)
  	    {
  		/* Detect utf-8 file by a non-ASCII char in the first line. */
  		this_utf8 = MAYBE;
  		for (s = IObuff; *s != NUL; ++s)
  		    if (*s >= 0x80)
  		    {
  			int l;
  
  			this_utf8 = TRUE;
  			l = utf_ptr2len(s);
  			if (l == 1)
  			{
  			    /* Illegal UTF-8 byte sequence. */
  			    this_utf8 = FALSE;
  			    break;
  			}
  			s += l - 1;
  		    }
  		if (this_utf8 == MAYBE)	    /* only ASCII characters found */
  		    this_utf8 = FALSE;
  		if (utf8 == MAYBE)	    /* first file */
  		    utf8 = this_utf8;
  		else if (utf8 != this_utf8)
  		{
  		    EMSG2(_("E670: Mix of help file encodings within a language: %s"), files[fi]);
  		    mix = !got_int;
  		    got_int = TRUE;
  		}
  		firstline = FALSE;
  	    }
  # endif
  	    p1 = vim_strchr(IObuff, '*');	/* find first '*' */
  	    while (p1 != NULL)
  	    {
  		/* Use vim_strbyte() instead of vim_strchr() so that when
  		 * 'encoding' is dbcs it still works, don't find '*' in the
  		 * second byte. */
  		p2 = vim_strbyte(p1 + 1, '*');	/* find second '*' */
  		if (p2 != NULL && p2 > p1 + 1)	/* skip "*" and "**" */
  		{
  		    for (s = p1 + 1; s < p2; ++s)
  			if (*s == ' ' || *s == '\t' || *s == '|')
  			    break;
  
  		    /*
  		     * Only accept a *tag* when it consists of valid
  		     * characters, there is white space before it and is
  		     * followed by a white character or end-of-line.
  		     */
  		    if (s == p2
  			    && (p1 == IObuff || p1[-1] == ' ' || p1[-1] == '\t')
  			    && (vim_strchr((char_u *)" \t\n\r", s[1]) != NULL
  				|| s[1] == '\0'))
  		    {
  			*p2 = '\0';
  			++p1;
  			if (ga_grow(&ga, 1) == FAIL)
  			{
  			    got_int = TRUE;
  			    break;
  			}
  			s = alloc((unsigned)(p2 - p1 + STRLEN(fname) + 2));
  			if (s == NULL)
  			{
  			    got_int = TRUE;
  			    break;
  			}
  			((char_u **)ga.ga_data)[ga.ga_len] = s;
  			++ga.ga_len;
  			sprintf((char *)s, "%s\t%s", p1, fname);
  
  			/* find next '*' */
  			p2 = vim_strchr(p2 + 1, '*');
  		    }
  		}
  		p1 = p2;
  	    }
  	    line_breakcheck();
  	}
  
  	fclose(fd);
      }
  
      FreeWild(filecount, files);
  
      if (!got_int)
      {
  	/*
  	 * Sort the tags.
  	 */
  	sort_strings((char_u **)ga.ga_data, ga.ga_len);
  
  	/*
  	 * Check for duplicates.
  	 */
  	for (i = 1; i < ga.ga_len; ++i)
  	{
  	    p1 = ((char_u **)ga.ga_data)[i - 1];
  	    p2 = ((char_u **)ga.ga_data)[i];
  	    while (*p1 == *p2)
  	    {
  		if (*p2 == '\t')
  		{
  		    *p2 = NUL;
  		    vim_snprintf((char *)NameBuff, MAXPATHL,
  			    _("E154: Duplicate tag \"%s\" in file %s/%s"),
  				     ((char_u **)ga.ga_data)[i], dir, p2 + 1);
  		    EMSG(NameBuff);
  		    *p2 = '\t';
  		    break;
  		}
  		++p1;
  		++p2;
  	    }
  	}
  
  # ifdef FEAT_MBYTE
  	if (utf8 == TRUE)
  	    fprintf(fd_tags, "!_TAG_FILE_ENCODING\tutf-8\t//\n");
  # endif
  
  	/*
  	 * Write the tags into the file.
  	 */
  	for (i = 0; i < ga.ga_len; ++i)
  	{
  	    s = ((char_u **)ga.ga_data)[i];
  	    if (STRNCMP(s, "help-tags\t", 10) == 0)
  		/* help-tags entry was added in formatted form */
  		fputs((char *)s, fd_tags);
  	    else
  	    {
  		fprintf(fd_tags, "%s\t/*", s);
  		for (p1 = s; *p1 != '\t'; ++p1)
  		{
  		    /* insert backslash before '\\' and '/' */
  		    if (*p1 == '\\' || *p1 == '/')
  			putc('\\', fd_tags);
  		    putc(*p1, fd_tags);
  		}
  		fprintf(fd_tags, "*\n");
  	    }
  	}
      }
  #ifdef FEAT_MBYTE
      if (mix)
  	got_int = FALSE;    /* continue with other languages */
  #endif
  
      for (i = 0; i < ga.ga_len; ++i)
  	vim_free(((char_u **)ga.ga_data)[i]);
      ga_clear(&ga);
      fclose(fd_tags);	    /* there is no check for an error... */
  }
  #endif
  
  #if defined(FEAT_SIGNS) || defined(PROTO)
  
  /*
   * Struct to hold the sign properties.
   */
  typedef struct sign sign_T;
  
  struct sign
  {
      sign_T	*sn_next;	/* next sign in list */
      int		sn_typenr;	/* type number of sign */
      char_u	*sn_name;	/* name of sign */
      char_u	*sn_icon;	/* name of pixmap */
  #ifdef FEAT_SIGN_ICONS
      void	*sn_image;	/* icon image */
  #endif
      char_u	*sn_text;	/* text used instead of pixmap */
      int		sn_line_hl;	/* highlight ID for line */
      int		sn_text_hl;	/* highlight ID for text */
  };
  
  static sign_T	*first_sign = NULL;
  static int	next_sign_typenr = 1;
  
  static int sign_cmd_idx __ARGS((char_u *begin_cmd, char_u *end_cmd));
  static void sign_list_defined __ARGS((sign_T *sp));
  static void sign_undefine __ARGS((sign_T *sp, sign_T *sp_prev));
  
  static char *cmds[] = {
  			"define",
  #define SIGNCMD_DEFINE	0
  			"undefine",
  #define SIGNCMD_UNDEFINE 1
  			"list",
  #define SIGNCMD_LIST	2
  			"place",
  #define SIGNCMD_PLACE	3
  			"unplace",
  #define SIGNCMD_UNPLACE	4
  			"jump",
  #define SIGNCMD_JUMP	5
  			NULL
  #define SIGNCMD_LAST	6
  };
  
  /*
   * Find index of a ":sign" subcmd from its name.
   * "*end_cmd" must be writable.
   */
      static int
  sign_cmd_idx(begin_cmd, end_cmd)
      char_u	*begin_cmd;	/* begin of sign subcmd */
      char_u	*end_cmd;	/* just after sign subcmd */
  {
      int		idx;
      char	save = *end_cmd;
  
      *end_cmd = NUL;
      for (idx = 0; ; ++idx)
  	if (cmds[idx] == NULL || STRCMP(begin_cmd, cmds[idx]) == 0)
  	    break;
      *end_cmd = save;
      return idx;
  }
  
  /*
   * ":sign" command
   */
      void
  ex_sign(eap)
      exarg_T	*eap;
  {
      char_u	*arg = eap->arg;
      char_u	*p;
      int		idx;
      sign_T	*sp;
      sign_T	*sp_prev;
      buf_T	*buf;
  
      /* Parse the subcommand. */
      p = skiptowhite(arg);
      idx = sign_cmd_idx(arg, p);
      if (idx == SIGNCMD_LAST)
      {
  	EMSG2(_("E160: Unknown sign command: %s"), arg);
  	return;
      }
      arg = skipwhite(p);
  
      if (idx <= SIGNCMD_LIST)
      {
  	/*
  	 * Define, undefine or list signs.
  	 */
  	if (idx == SIGNCMD_LIST && *arg == NUL)
  	{
  	    /* ":sign list": list all defined signs */
  	    for (sp = first_sign; sp != NULL && !got_int; sp = sp->sn_next)
  		sign_list_defined(sp);
  	}
  	else if (*arg == NUL)
  	    EMSG(_("E156: Missing sign name"));
  	else
  	{
  	    /* Isolate the sign name.  If it's a number skip leading zeroes,
  	     * so that "099" and "99" are the same sign.  But keep "0". */
  	    p = skiptowhite(arg);
  	    if (*p != NUL)
  		*p++ = NUL;
  	    while (arg[0] == '0' && arg[1] != NUL)
  		++arg;
  
  	    sp_prev = NULL;
  	    for (sp = first_sign; sp != NULL; sp = sp->sn_next)
  	    {
  		if (STRCMP(sp->sn_name, arg) == 0)
  		    break;
  		sp_prev = sp;
  	    }
  	    if (idx == SIGNCMD_DEFINE)
  	    {
  		/* ":sign define {name} ...": define a sign */
  		if (sp == NULL)
  		{
  		    sign_T	*lp;
  		    int		start = next_sign_typenr;
  
  		    /* Allocate a new sign. */
  		    sp = (sign_T *)alloc_clear((unsigned)sizeof(sign_T));
  		    if (sp == NULL)
  			return;
  
  		    /* Check that next_sign_typenr is not already being used.
  		     * This only happens after wrapping around.  Hopefully
  		     * another one got deleted and we can use its number. */
  		    for (lp = first_sign; lp != NULL; )
  		    {
  			if (lp->sn_typenr == next_sign_typenr)
  			{
  			    ++next_sign_typenr;
  			    if (next_sign_typenr == MAX_TYPENR)
  				next_sign_typenr = 1;
  			    if (next_sign_typenr == start)
  			    {
  				vim_free(sp);
  				EMSG(_("E612: Too many signs defined"));
  				return;
  			    }
  			    lp = first_sign;  /* start all over */
  			    continue;
  			}
  			lp = lp->sn_next;
  		    }
  
  		    sp->sn_typenr = next_sign_typenr;
  		    if (++next_sign_typenr == MAX_TYPENR)
  			next_sign_typenr = 1; /* wrap around */
  
  		    sp->sn_name = vim_strsave(arg);
  		    if (sp->sn_name == NULL)  /* out of memory */
  		    {
  			vim_free(sp);
  			return;
  		    }
  
  		    /* add the new sign to the list of signs */
  		    if (sp_prev == NULL)
  			first_sign = sp;
  		    else
  			sp_prev->sn_next = sp;
  		}
  
  		/* set values for a defined sign. */
  		for (;;)
  		{
  		    arg = skipwhite(p);
  		    if (*arg == NUL)
  			break;
  		    p = skiptowhite_esc(arg);
  		    if (STRNCMP(arg, "icon=", 5) == 0)
  		    {
  			arg += 5;
  			vim_free(sp->sn_icon);
  			sp->sn_icon = vim_strnsave(arg, (int)(p - arg));
  			backslash_halve(sp->sn_icon);
  #ifdef FEAT_SIGN_ICONS
  			if (gui.in_use)
  			{
  			    out_flush();
  			    if (sp->sn_image != NULL)
  				gui_mch_destroy_sign(sp->sn_image);
  			    sp->sn_image = gui_mch_register_sign(sp->sn_icon);
  			}
  #endif
  		    }
  		    else if (STRNCMP(arg, "text=", 5) == 0)
  		    {
  			char_u	*s;
  			int	cells;
  			int	len;
  
  			arg += 5;
  #ifdef FEAT_MBYTE
  			/* Count cells and check for non-printable chars */
  			if (has_mbyte)
  			{
  			    cells = 0;
  			    for (s = arg; s < p; s += (*mb_ptr2len)(s))
  			    {
  				if (!vim_isprintc((*mb_ptr2char)(s)))
  				    break;
  				cells += (*mb_ptr2cells)(s);
  			    }
  			}
  			else
  #endif
  			{
  			    for (s = arg; s < p; ++s)
  				if (!vim_isprintc(*s))
  				    break;
  			    cells = (int)(s - arg);
  			}
  			/* Currently must be one or two display cells */
  			if (s != p || cells < 1 || cells > 2)
  			{
  			    *p = NUL;
  			    EMSG2(_("E239: Invalid sign text: %s"), arg);
  			    return;
  			}
  
  			vim_free(sp->sn_text);
  			/* Allocate one byte more if we need to pad up
  			 * with a space. */
  			len = (int)(p - arg + ((cells == 1) ? 1 : 0));
  			sp->sn_text = vim_strnsave(arg, len);
  
  			if (sp->sn_text != NULL && cells == 1)
  			    STRCPY(sp->sn_text + len - 1, " ");
  		    }
  		    else if (STRNCMP(arg, "linehl=", 7) == 0)
  		    {
  			arg += 7;
  			sp->sn_line_hl = syn_check_group(arg, (int)(p - arg));
  		    }
  		    else if (STRNCMP(arg, "texthl=", 7) == 0)
  		    {
  			arg += 7;
  			sp->sn_text_hl = syn_check_group(arg, (int)(p - arg));
  		    }
  		    else
  		    {
  			EMSG2(_(e_invarg2), arg);
  			return;
  		    }
  		}
  	    }
  	    else if (sp == NULL)
  		EMSG2(_("E155: Unknown sign: %s"), arg);
  	    else if (idx == SIGNCMD_LIST)
  		/* ":sign list {name}" */
  		sign_list_defined(sp);
  	    else
  		/* ":sign undefine {name}" */
  		sign_undefine(sp, sp_prev);
  	}
      }
      else
      {
  	int		id = -1;
  	linenr_T	lnum = -1;
  	char_u		*sign_name = NULL;
  	char_u		*arg1;
  
  	if (*arg == NUL)
  	{
  	    if (idx == SIGNCMD_PLACE)
  	    {
  		/* ":sign place": list placed signs in all buffers */
  		sign_list_placed(NULL);
  	    }
  	    else if (idx == SIGNCMD_UNPLACE)
  	    {
  		/* ":sign unplace": remove placed sign at cursor */
  		id = buf_findsign_id(curwin->w_buffer, curwin->w_cursor.lnum);
  		if (id > 0)
  		{
  		    buf_delsign(curwin->w_buffer, id);
  		    update_debug_sign(curwin->w_buffer, curwin->w_cursor.lnum);
  		}
  		else
  		    EMSG(_("E159: Missing sign number"));
  	    }
  	    else
  		EMSG(_(e_argreq));
  	    return;
  	}
  
  	if (idx == SIGNCMD_UNPLACE && arg[0] == '*' && arg[1] == NUL)
  	{
  	    /* ":sign unplace *": remove all placed signs */
  	    buf_delete_all_signs();
  	    return;
  	}
  
  	/* first arg could be placed sign id */
  	arg1 = arg;
  	if (VIM_ISDIGIT(*arg))
  	{
  	    id = getdigits(&arg);
  	    if (!vim_iswhite(*arg) && *arg != NUL)
  	    {
  		id = -1;
  		arg = arg1;
  	    }
  	    else
  	    {
  		arg = skipwhite(arg);
  		if (idx == SIGNCMD_UNPLACE && *arg == NUL)
  		{
  		    /* ":sign unplace {id}": remove placed sign by number */
  		    for (buf = firstbuf; buf != NULL; buf = buf->b_next)
  			if ((lnum = buf_delsign(buf, id)) != 0)
  			    update_debug_sign(buf, lnum);
  		    return;
  		}
  	    }
  	}
  
  	/*
  	 * Check for line={lnum} name={name} and file={fname} or buffer={nr}.
  	 * Leave "arg" pointing to {fname}.
  	 */
  	for (;;)
  	{
  	    if (STRNCMP(arg, "line=", 5) == 0)
  	    {
  		arg += 5;
  		lnum = atoi((char *)arg);
  		arg = skiptowhite(arg);
  	    }
  	    else if (STRNCMP(arg, "*", 1) == 0 && idx == SIGNCMD_UNPLACE)
  	    {
  		if (id != -1)
  		{
  		    EMSG(_(e_invarg));
  		    return;
  		}
  		id = -2;
  		arg = skiptowhite(arg + 1);
  	    }
  	    else if (STRNCMP(arg, "name=", 5) == 0)
  	    {
  		arg += 5;
  		sign_name = arg;
  		arg = skiptowhite(arg);
  		if (*arg != NUL)
  		    *arg++ = NUL;
  		while (sign_name[0] == '0' && sign_name[1] != NUL)
  		    ++sign_name;
  	    }
  	    else if (STRNCMP(arg, "file=", 5) == 0)
  	    {
  		arg += 5;
  		buf = buflist_findname(arg);
  		break;
  	    }
  	    else if (STRNCMP(arg, "buffer=", 7) == 0)
  	    {
  		arg += 7;
  		buf = buflist_findnr((int)getdigits(&arg));
  		if (*skipwhite(arg) != NUL)
  		    EMSG(_(e_trailing));
  		break;
  	    }
  	    else
  	    {
  		EMSG(_(e_invarg));
  		return;
  	    }
  	    arg = skipwhite(arg);
  	}
  
  	if (buf == NULL)
  	{
  	    EMSG2(_("E158: Invalid buffer name: %s"), arg);
  	}
  	else if (id <= 0 && !(idx == SIGNCMD_UNPLACE && id == -2))
  	{
  	    if (lnum >= 0 || sign_name != NULL)
  		EMSG(_(e_invarg));
  	    else
  		/* ":sign place file={fname}": list placed signs in one file */
  		sign_list_placed(buf);
  	}
  	else if (idx == SIGNCMD_JUMP)
  	{
  	    /* ":sign jump {id} file={fname}" */
  	    if (lnum >= 0 || sign_name != NULL)
  		EMSG(_(e_invarg));
  	    else if ((lnum = buf_findsign(buf, id)) > 0)
  	    {				/* goto a sign ... */
  		if (buf_jump_open_win(buf) != NULL)
  		{			/* ... in a current window */
  		    curwin->w_cursor.lnum = lnum;
  		    check_cursor_lnum();
  		    beginline(BL_WHITE);
  		}
  		else
  		{			/* ... not currently in a window */
  		    char_u	*cmd;
  
  		    cmd = alloc((unsigned)STRLEN(buf->b_fname) + 25);
  		    if (cmd == NULL)
  			return;
  		    sprintf((char *)cmd, "e +%ld %s", (long)lnum, buf->b_fname);
  		    do_cmdline_cmd(cmd);
  		    vim_free(cmd);
  		}
  #ifdef FEAT_FOLDING
  		foldOpenCursor();
  #endif
  	    }
  	    else
  		EMSGN(_("E157: Invalid sign ID: %ld"), id);
  	}
  	else if (idx == SIGNCMD_UNPLACE)
  	{
  	    if (lnum >= 0 || sign_name != NULL)
  		EMSG(_(e_invarg));
  	    else if (id == -2)
  	    {
  		/* ":sign unplace * file={fname}" */
  		redraw_buf_later(buf, NOT_VALID);
  		buf_delete_signs(buf);
  	    }
  	    else
  	    {
  		/* ":sign unplace {id} file={fname}" */
  		lnum = buf_delsign(buf, id);
  		update_debug_sign(buf, lnum);
  	    }
  	}
  	    /* idx == SIGNCMD_PLACE */
  	else if (sign_name != NULL)
  	{
  	    for (sp = first_sign; sp != NULL; sp = sp->sn_next)
  		if (STRCMP(sp->sn_name, sign_name) == 0)
  		    break;
  	    if (sp == NULL)
  	    {
  		EMSG2(_("E155: Unknown sign: %s"), sign_name);
  		return;
  	    }
  	    if (lnum > 0)
  		/* ":sign place {id} line={lnum} name={name} file={fname}":
  		 * place a sign */
  		buf_addsign(buf, id, lnum, sp->sn_typenr);
  	    else
  		/* ":sign place {id} file={fname}": change sign type */
  		lnum = buf_change_sign_type(buf, id, sp->sn_typenr);
  	    update_debug_sign(buf, lnum);
  	}
  	else
  	    EMSG(_(e_invarg));
      }
  }
  
  #if defined(FEAT_SIGN_ICONS) || defined(PROTO)
  /*
   * Allocate the icons.  Called when the GUI has started.  Allows defining
   * signs before it starts.
   */
      void
  sign_gui_started()
  {
      sign_T	*sp;
  
      for (sp = first_sign; sp != NULL; sp = sp->sn_next)
  	if (sp->sn_icon != NULL)
  	    sp->sn_image = gui_mch_register_sign(sp->sn_icon);
  }
  #endif
  
  /*
   * List one sign.
   */
      static void
  sign_list_defined(sp)
      sign_T	*sp;
  {
      char_u	*p;
  
      smsg((char_u *)"sign %s", sp->sn_name);
      if (sp->sn_icon != NULL)
      {
  	MSG_PUTS(" icon=");
  	msg_outtrans(sp->sn_icon);
  #ifdef FEAT_SIGN_ICONS
  	if (sp->sn_image == NULL)
  	    MSG_PUTS(_(" (NOT FOUND)"));
  #else
  	MSG_PUTS(_(" (not supported)"));
  #endif
      }
      if (sp->sn_text != NULL)
      {
  	MSG_PUTS(" text=");
  	msg_outtrans(sp->sn_text);
      }
      if (sp->sn_line_hl > 0)
      {
  	MSG_PUTS(" linehl=");
  	p = get_highlight_name(NULL, sp->sn_line_hl - 1);
  	if (p == NULL)
  	    MSG_PUTS("NONE");
  	else
  	    msg_puts(p);
      }
      if (sp->sn_text_hl > 0)
      {
  	MSG_PUTS(" texthl=");
  	p = get_highlight_name(NULL, sp->sn_text_hl - 1);
  	if (p == NULL)
  	    MSG_PUTS("NONE");
  	else
  	    msg_puts(p);
      }
  }
  
  /*
   * Undefine a sign and free its memory.
   */
      static void
  sign_undefine(sp, sp_prev)
      sign_T	*sp;
      sign_T	*sp_prev;
  {
      vim_free(sp->sn_name);
      vim_free(sp->sn_icon);
  #ifdef FEAT_SIGN_ICONS
      if (sp->sn_image != NULL)
      {
  	out_flush();
  	gui_mch_destroy_sign(sp->sn_image);
      }
  #endif
      vim_free(sp->sn_text);
      if (sp_prev == NULL)
  	first_sign = sp->sn_next;
      else
  	sp_prev->sn_next = sp->sn_next;
      vim_free(sp);
  }
  
  /*
   * Get highlighting attribute for sign "typenr".
   * If "line" is TRUE: line highl, if FALSE: text highl.
   */
      int
  sign_get_attr(typenr, line)
      int		typenr;
      int		line;
  {
      sign_T	*sp;
  
      for (sp = first_sign; sp != NULL; sp = sp->sn_next)
  	if (sp->sn_typenr == typenr)
  	{
  	    if (line)
  	    {
  		if (sp->sn_line_hl > 0)
  		    return syn_id2attr(sp->sn_line_hl);
  	    }
  	    else
  	    {
  		if (sp->sn_text_hl > 0)
  		    return syn_id2attr(sp->sn_text_hl);
  	    }
  	    break;
  	}
      return 0;
  }
  
  /*
   * Get text mark for sign "typenr".
   * Returns NULL if there isn't one.
   */
      char_u *
  sign_get_text(typenr)
      int		typenr;
  {
      sign_T	*sp;
  
      for (sp = first_sign; sp != NULL; sp = sp->sn_next)
  	if (sp->sn_typenr == typenr)
  	    return sp->sn_text;
      return NULL;
  }
  
  #if defined(FEAT_SIGN_ICONS) || defined(PROTO)
      void *
  sign_get_image(typenr)
      int		typenr;		/* the attribute which may have a sign */
  {
      sign_T	*sp;
  
      for (sp = first_sign; sp != NULL; sp = sp->sn_next)
  	if (sp->sn_typenr == typenr)
  	    return sp->sn_image;
      return NULL;
  }
  #endif
  
  /*
   * Get the name of a sign by its typenr.
   */
      char_u *
  sign_typenr2name(typenr)
      int		typenr;
  {
      sign_T	*sp;
  
      for (sp = first_sign; sp != NULL; sp = sp->sn_next)
  	if (sp->sn_typenr == typenr)
  	    return sp->sn_name;
      return (char_u *)_("[Deleted]");
  }
  
  #if defined(EXITFREE) || defined(PROTO)
  /*
   * Undefine/free all signs.
   */
      void
  free_signs()
  {
      while (first_sign != NULL)
  	sign_undefine(first_sign, NULL);
  }
  #endif
  
  #if defined(FEAT_CMDL_COMPL) || defined(PROTO)
  static enum
  {
      EXP_SUBCMD,		/* expand :sign sub-commands */
      EXP_DEFINE,		/* expand :sign define {name} args */
      EXP_PLACE,		/* expand :sign place {id} args */
      EXP_UNPLACE,	/* expand :sign unplace" */
      EXP_SIGN_NAMES	/* expand with name of placed signs */
  } expand_what;
  
  /*
   * Function given to ExpandGeneric() to obtain the sign command
   * expansion.
   */
      char_u *
  get_sign_name(xp, idx)
      expand_T	*xp UNUSED;
      int		idx;
  {
      sign_T	*sp;
      int		current_idx;
  
      switch (expand_what)
      {
      case EXP_SUBCMD:
  	return (char_u *)cmds[idx];
      case EXP_DEFINE:
  	{
  	    char *define_arg[] =
  	    {
  		"icon=", "linehl=", "text=", "texthl=", NULL
  	    };
  	    return (char_u *)define_arg[idx];
  	}
      case EXP_PLACE:
  	{
  	    char *place_arg[] =
  	    {
  		"line=", "name=", "file=", "buffer=", NULL
  	    };
  	    return (char_u *)place_arg[idx];
  	}
      case EXP_UNPLACE:
  	{
  	    char *unplace_arg[] = { "file=", "buffer=", NULL };
  	    return (char_u *)unplace_arg[idx];
  	}
      case EXP_SIGN_NAMES:
  	/* Complete with name of signs already defined */
  	current_idx = 0;
  	for (sp = first_sign; sp != NULL; sp = sp->sn_next)
  	    if (current_idx++ == idx)
  		return sp->sn_name;
  	return NULL;
      default:
  	return NULL;
      }
  }
  
  /*
   * Handle command line completion for :sign command.
   */
      void
  set_context_in_sign_cmd(xp, arg)
      expand_T	*xp;
      char_u	*arg;
  {
      char_u	*p;
      char_u	*end_subcmd;
      char_u	*last;
      int		cmd_idx;
      char_u	*begin_subcmd_args;
  
      /* Default: expand subcommands. */
      xp->xp_context = EXPAND_SIGN;
      expand_what = EXP_SUBCMD;
      xp->xp_pattern = arg;
  
      end_subcmd = skiptowhite(arg);
      if (*end_subcmd == NUL)
  	/* expand subcmd name
  	 * :sign {subcmd}<CTRL-D>*/
  	return;
  
      cmd_idx = sign_cmd_idx(arg, end_subcmd);
  
      /* :sign {subcmd} {subcmd_args}
       *		      |
       *		      begin_subcmd_args */
      begin_subcmd_args = skipwhite(end_subcmd);
      p = skiptowhite(begin_subcmd_args);
      if (*p == NUL)
      {
  	/*
  	 * Expand first argument of subcmd when possible.
  	 * For ":jump {id}" and ":unplace {id}", we could
  	 * possibly expand the ids of all signs already placed.
  	 */
  	xp->xp_pattern = begin_subcmd_args;
  	switch (cmd_idx)
  	{
  	    case SIGNCMD_LIST:
  	    case SIGNCMD_UNDEFINE:
  		/* :sign list <CTRL-D>
  		 * :sign undefine <CTRL-D> */
  		expand_what = EXP_SIGN_NAMES;
  		break;
  	    default:
  		xp->xp_context = EXPAND_NOTHING;
  	}
  	return;
      }
  
      /* expand last argument of subcmd */
  
      /* :sign define {name} {args}...
       *		    |
       *		    p */
  
      /* Loop until reaching last argument. */
      do
      {
  	p = skipwhite(p);
  	last = p;
  	p = skiptowhite(p);
      } while (*p != NUL);
  
      p = vim_strchr(last, '=');
  
      /* :sign define {name} {args}... {last}=
       *				     |	   |
       *				  last	   p */
      if (p == NUL)
      {
  	/* Expand last argument name (before equal sign). */
  	xp->xp_pattern = last;
  	switch (cmd_idx)
  	{
  	    case SIGNCMD_DEFINE:
  		expand_what = EXP_DEFINE;
  		break;
  	    case SIGNCMD_PLACE:
  		expand_what = EXP_PLACE;
  		break;
  	    case SIGNCMD_JUMP:
  	    case SIGNCMD_UNPLACE:
  		expand_what = EXP_UNPLACE;
  		break;
  	    default:
  		xp->xp_context = EXPAND_NOTHING;
  	}
      }
      else
      {
  	/* Expand last argument value (after equal sign). */
  	xp->xp_pattern = p + 1;
  	switch (cmd_idx)
  	{
  	    case SIGNCMD_DEFINE:
  		if (STRNCMP(last, "texthl", p - last) == 0 ||
  		    STRNCMP(last, "linehl", p - last) == 0)
  		    xp->xp_context = EXPAND_HIGHLIGHT;
  		else if (STRNCMP(last, "icon", p - last) == 0)
  		    xp->xp_context = EXPAND_FILES;
  		else
  		    xp->xp_context = EXPAND_NOTHING;
  		break;
  	    case SIGNCMD_PLACE:
  		if (STRNCMP(last, "name", p - last) == 0)
  		    expand_what = EXP_SIGN_NAMES;
  		else
  		    xp->xp_context = EXPAND_NOTHING;
  		break;
  	    default:
  		xp->xp_context = EXPAND_NOTHING;
  	}
      }
  }
  #endif
  #endif
  
  #if defined(FEAT_GUI) || defined(FEAT_CLIENTSERVER) || defined(PROTO)
  /*
   * ":drop"
   * Opens the first argument in a window.  When there are two or more arguments
   * the argument list is redefined.
   */
      void
  ex_drop(eap)
      exarg_T	*eap;
  {
      int		split = FALSE;
      win_T	*wp;
      buf_T	*buf;
  # ifdef FEAT_WINDOWS
      tabpage_T	*tp;
  # endif
  
      /*
       * Check if the first argument is already being edited in a window.  If
       * so, jump to that window.
       * We would actually need to check all arguments, but that's complicated
       * and mostly only one file is dropped.
       * This also ignores wildcards, since it is very unlikely the user is
       * editing a file name with a wildcard character.
       */
      set_arglist(eap->arg);
  
      /*
       * Expanding wildcards may result in an empty argument list.  E.g. when
       * editing "foo.pyc" and ".pyc" is in 'wildignore'.  Assume that we
       * already did an error message for this.
       */
      if (ARGCOUNT == 0)
  	return;
  
  # ifdef FEAT_WINDOWS
      if (cmdmod.tab)
      {
  	/* ":tab drop file ...": open a tab for each argument that isn't
  	 * edited in a window yet.  It's like ":tab all" but without closing
  	 * windows or tabs. */
  	ex_all(eap);
      }
      else
  # endif
      {
  	/* ":drop file ...": Edit the first argument.  Jump to an existing
  	 * window if possible, edit in current window if the current buffer
  	 * can be abandoned, otherwise open a new window. */
  	buf = buflist_findnr(ARGLIST[0].ae_fnum);
  
  	FOR_ALL_TAB_WINDOWS(tp, wp)
  	{
  	    if (wp->w_buffer == buf)
  	    {
  # ifdef FEAT_WINDOWS
  		goto_tabpage_win(tp, wp);
  # endif
  		curwin->w_arg_idx = 0;
  		return;
  	    }
  	}
  
  	/*
  	 * Check whether the current buffer is changed. If so, we will need
  	 * to split the current window or data could be lost.
  	 * Skip the check if the 'hidden' option is set, as in this case the
  	 * buffer won't be lost.
  	 */
  	if (!P_HID(curbuf))
  	{
  # ifdef FEAT_WINDOWS
  	    ++emsg_off;
  # endif
  	    split = check_changed(curbuf, TRUE, FALSE, FALSE, FALSE);
  # ifdef FEAT_WINDOWS
  	    --emsg_off;
  # else
  	    if (split)
  		return;
  # endif
  	}
  
  	/* Fake a ":sfirst" or ":first" command edit the first argument. */
  	if (split)
  	{
  	    eap->cmdidx = CMD_sfirst;
  	    eap->cmd[0] = 's';
  	}
  	else
  	    eap->cmdidx = CMD_first;
  	ex_rewind(eap);
      }
  }
  #endif
  