vim: src/ex_cmds.c comparison

comparison src/ex_cmds.c @ 7:3fc0f57ecb91 v7.0001

updated for version 7.0001

author	vimboss
date	Sun, 13 Jun 2004 20:20:40 +0000
parents
children	4102fb4ea781

comparison

equal deleted inserted replaced

-:c2daee826b8f
+:3fc0f57ecb91
+/* 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 want_info, int want_marks, int force_read));
+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_overwrite __ARGS((exarg_T *eap, buf_T *buf, char_u *fname, char_u *ffname, int other));
+static int check_readonly __ARGS((int *forceit, buf_T *buf));
+#ifdef FEAT_AUTOCMD
+static void delbuf_msg __ARGS((char_u *name));
+#endif
+static int do_sub_msg __ARGS((void));
+static int
+#ifdef __BORLANDC__
+_RTLENTRYF
+#endif
+	help_compare __ARGS((const void *s1, const void *s2));
+/*
+* ":ascii" and "ga".
+*/
+/*ARGSUSED*/
+void
+do_ascii(eap)
+exarg_T	*eap;
+{
+int		c;
+char	buf1[20];
+char	buf2[20];
+char_u	buf3[7];
+#ifdef FEAT_MBYTE
+int		c1 = 0;
+int		c2 = 0;
+int		len;
+if (enc_utf8)
+	c = utfc_ptr2char(ml_get_cursor(), &c1, &c2);
+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 (vim_isprintc_strict(c) && (c < ' '
+#ifndef EBCDIC
+		    || c > '~'
+#endif
+			       ))
+	{
+	    transchar_nonprint(buf3, c);
+	    sprintf(buf1, "  <%s>", (char *)buf3);
+	}
+	else
+	    buf1[0] = NUL;
+#ifndef EBCDIC
+	if (c >= 0x80)
+	    sprintf(buf2, "  <M-%s>", transchar(c & 0x7f));
+	else
+#endif
+	    buf2[0] = NUL;
+	sprintf((char *)IObuff, _("<%s>%s%s  %d,  Hex %02x,  Octal %03o"),
+		transchar(c), buf1, buf2, c, c, c);
+#ifdef FEAT_MBYTE
+	c = c1;
+	c1 = c2;
+	c2 = 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 (utf_iscomposing(c)
+#ifdef USE_GUI
+		&& !gui.in_use
+#endif
+		)
+	    IObuff[len++] = ' '; /* draw composing char on top of a space */
+	IObuff[len + (*mb_char2bytes)(c, IObuff + len)] = NUL;
+	sprintf((char *)IObuff + STRLEN(IObuff),
+			c < 0x10000 ? _("> %d, Hex %04x, Octal %o")
+				    : _("> %d, Hex %08x, Octal %o"), c, c, c);
+	c = c1;
+	c1 = c2;
+	c2 = 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
+	{
+	    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;
+}
+/*
+* ":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_check)(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);
+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);
+/*
+* 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)
+	changed_lines(line1, 0, dest + num_lines + 1, 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);
+}
+/*
+* 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.
+*
+* RISCOS: Bangs only replaced when followed by a space, since many
+* pathnames contain one.
+*/
+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 */
+static char_u	*prevcmd = NULL;	/* the previous command */
+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(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 == '!'
+#ifdef RISCOS
+			&& (p[1] == ' ' || p[1] == NUL)
+#endif
+					)
+	    {
+		if (p > newcmd && p[-1] == '\\')
+		    mch_memmove(p - 1, p, (size_t)(STRLEN(p) + 1));
+		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);
+	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);
+if (free_newcmd)
+	vim_free(newcmd);
+}
+/*
+* do_filter: filter lines through a command given by the user
+*
+* We 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.
+* 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
+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();
+/*
+* 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
+*/
+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 (do_in && 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');
+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();
+/*
+* 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
+						| (do_out ? SHELL_DOOUT : 0)))
+{
+	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 (u_save((linenr_T)(line2), (linenr_T)(line2 + 1)) == FAIL)
+	    goto error;
+	redraw_curbuf_later(VALID);
+	read_linecount = curbuf->b_ml.ml_line_count;
+	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
+	if (do_in)
+	{
+	    if (cmdmod.keepmarks || vim_strchr(p_cpo, CPO_REMMARK) == NULL)
+	    {
+		read_linecount = curbuf->b_ml.ml_line_count - read_linecount;
+		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 */
+	}
+	else
+	{
+	    /*
+	     * Put cursor on last new line for ":r !cmd".
+	     */
+	    curwin->w_cursor.lnum = curbuf->b_op_end.lnum;
+	    linecount = curbuf->b_op_end.lnum - curbuf->b_op_start.lnum + 1;
+	}
+	beginline(BL_WHITE | BL_FIX);	    /* cursor on first non-blank */
+	--no_wait_return;
+	if (linecount > p_report)
+	{
+	    if (do_in)
+	    {
+		sprintf((char *)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);
+		    keep_msg_attr = 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();
+}
+/*
+* 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)
+*/
+sprintf((char *)buf, "(%s)", (char *)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;
+	}
+# ifdef RISCOS
+	STRCAT(buf, " { < ");	/* Use RISC OS notation for input. */
+	STRCAT(buf, itmp);
+	STRCAT(buf, " } ");
+# else
+	STRCAT(buf, " <");	/* " < " causes problems on Amiga */
+	STRCAT(buf, itmp);
+# endif
+	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, p_srr, otmp);
+return buf;
+}
+/*
+* Append output redirection for file "fname" to the end of string buffer "buf"
+* 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, opt, fname)
+char_u	*buf;
+char_u	*opt;
+char_u	*fname;
+{
+char_u	*p;
+buf += STRLEN(buf);
+/* find "%s", skipping "%%" */
+for (p = opt; (p = vim_strchr(p, '%')) != NULL; ++p)
+	if (p[1] == 's')
+	    break;
+if (p != NULL)
+{
+	*buf = ' '; /* not really needed? Not with sh, ksh or bash */
+	sprintf((char *)buf + 1, (char *)opt, (char *)fname);
+}
+else
+	sprintf((char *)buf,
+#ifdef FEAT_QUICKFIX
+# ifndef RISCOS
+		opt != p_sp ? " %s%s" :
+# endif
+		" %s %s",
+#else
+# ifndef RISCOS
+		" %s%s",	/* " > %s" causes problems on Amiga */
+# else
+		" %s %s",	/* But is needed for 'shellpipe' and RISC OS */
+# endif
+#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;
+{
+sprintf((char *)IObuff, _("%sviminfo: %s in line: "), errnum, message);
+STRNCAT(IObuff, line, IOSIZE - STRLEN(IObuff));
+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 force is TRUE. -- webb
+*/
+int
+read_viminfo(file, want_info, want_marks, forceit)
+char_u	*file;
+int		want_info;
+int		want_marks;
+int		forceit;
+{
+FILE	*fp;
+char_u	*fname;
+if (no_viminfo())
+	return FAIL;
+fname = viminfo_filename(file);	    /* may set to default if NULL */
+if (fname == NULL)
+	return FAIL;
+fp = mch_fopen((char *)fname, READBIN);
+if (p_verbose > 0)
+{
+	char_u	*s;
+	s = fname;
+	if (STRLEN(fname) > IOSIZE - 100)
+	    s = fname + STRLEN(fname) - (IOSIZE - 100);
+	smsg((char_u *)_("Reading viminfo file \"%s\"%s%s%s"), s,
+		    want_info ? _(" info") : "",
+		    want_marks ? _(" marks") : "",
+		    fp == NULL ? _(" FAILED") : "");
+}
+vim_free(fname);
+if (fp == NULL)
+	return FAIL;
+viminfo_errcnt = 0;
+do_viminfo(fp, NULL, want_info, want_marks, forceit);
+fclose(fp);
+return OK;
+}
+/*
+* write_viminfo() -- 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. -- webb
+*/
+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
+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 = st_old.st_ino = 0;
+	st_old.st_mode = 0600;
+	if (mch_stat((char *)fname, &st_old) == 0 && getuid() &&
+		!(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;
+	    /* avoid a wait_return for this message, it's annoying */
+	    tt = msg_didany;
+	    EMSG2(_("E137: Viminfo file is not writable: %s"), fname);
+	    msg_didany = tt;
+	    goto end;
+	}
+#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
+# ifdef RISCOS
+				    (char_u *)"/tmp",
+# else
+				    (char_u *)".tmp",
+# endif
+#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)
+	{
+	    fp_out = mch_fopen((char *)tempname, WRITEBIN);
+	    /*
+	     * 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);
+	    }
+#ifdef UNIX
+	    /*
+	     * Set file protection same as original file, but strip s-bit
+	     * and make sure the owner can read/write it.
+	     */
+	    if (fp_out != NULL)
+	    {
+		(void)mch_setperm(tempname,
+				  (long)((st_old.st_mode & 0777) | 0600));
+		/* this only works for root: */
+		(void)chown((char *)tempname, 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 == NUL) ? fname : tempname);
+	if (fp_in != NULL)
+	    fclose(fp_in);
+	goto end;
+}
+if (p_verbose > 0)
+	msg_str((char_u *)_("Writing viminfo file \"%s\""), fname);
+viminfo_errcnt = 0;
+do_viminfo(fp_in, fp_out, !forceit, !forceit, FALSE);
+fclose(fp_out);	    /* errors are ignored !? */
+if (fp_in != NULL)
+{
+	fclose(fp_in);
+	/*
+	 * In case of an error, don't overwrite the original viminfo file.
+	 */
+	if (viminfo_errcnt || vim_rename(tempname, fname) == -1)
+	    mch_remove(tempname);
+}
+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, want_info, want_marks, force_read)
+FILE	*fp_in;
+FILE	*fp_out;
+int		want_info;
+int		want_marks;
+int		force_read;
+{
+int		count = 0;
+int		eof = FALSE;
+vir_T	vir;
+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 (want_info)
+	    eof = read_viminfo_up_to_marks(&vir, force_read, fp_out != NULL);
+	else
+	    /* 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);
+	fprintf(fp_out, _("# You may edit it if you're careful!\n\n"));
+#ifdef FEAT_MBYTE
+	fprintf(fp_out, _("# Value of 'encoding' when this file was written\n"));
+	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);
+#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 && want_marks)
+	copy_viminfo_marks(&vir, fp_out, count, eof);
+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);
+#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);
+#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. */
+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).
+*/
+/*ARGSUSED*/
+char_u *
+viminfo_readstring(virp, off, convert)
+vir_T	*virp;
+int		off;		    /* offset for virp->vir_line */
+int		convert;	    /* 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 ^?	^?
+*/
+/*ARGSUSED*/
+void
+do_fixdel(eap)
+exarg_T	*eap;
+{
+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)
+linenr_T	lnum;
+int		use_number;
+{
+char_u	numbuf[20];
+if (curwin->w_p_nu || use_number)
+{
+	sprintf((char *)numbuf, "%7ld ", (long)lnum);
+	msg_puts_attr(numbuf, hl_attr(HLF_N));	/* Highlight line nrs */
+}
+msg_prt_line(ml_get(lnum));
+}
+/*
+* Print a text line.  Also in silent mode ("ex -s").
+*/
+void
+print_line(lnum, use_number)
+linenr_T	lnum;
+int		use_number;
+{
+int		save_silent = silent_mode;
+silent_mode = FALSE;
+msg_start();
+print_line_no_prefix(lnum, use_number);
+if (save_silent)
+{
+	msg_putchar('\n');
+	cursor_on();		/* msg_start() switches it off */
+	out_flush();
+	silent_mode = save_silent;
+}
+}
+/*
+* ":file[!] [fname]".
+*/
+void
+ex_file(eap)
+exarg_T	*eap;
+{
+char_u	*fname, *sfname, *xfname;
+buf_T	*buf;
+if (*eap->arg != NUL)
+{
+#ifdef FEAT_AUTOCMD
+	buf = curbuf;
+	apply_autocmds(EVENT_BUFFILEPRE, NULL, NULL, FALSE, curbuf);
+	/* buffer changed, don't change name now */
+	if (buf != curbuf)
+	    return;
+# ifdef FEAT_EVAL
+	if (aborting())	    /* autocmds may abort script processing */
+	    return;
+# 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.
+	 */
+	fname = curbuf->b_ffname;
+	sfname = curbuf->b_sfname;
+	xfname = curbuf->b_fname;
+	curbuf->b_ffname = NULL;
+	curbuf->b_sfname = NULL;
+	if (setfname(curbuf, eap->arg, NULL, TRUE) == FAIL)
+	{
+	    curbuf->b_ffname = fname;
+	    curbuf->b_sfname = sfname;
+	    return;
+	}
+	curbuf->b_flags |= BF_NOTEDITED;
+	buf = buflist_new(fname, xfname, curwin->w_cursor.lnum, 0);
+	if (buf != NULL)
+	    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
+}
+/* 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(TRUE, (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(_("E139: File is loaded in another buffer"));
+	    goto theend;
+	}
+}
+/*
+* Writing to the current file is not allowed in readonly mode
+* and a file name is required.
+* "nofile" and "nowrite" buffers cannot be written implicitly either.
+*/
+if (!other && (
+#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);
+# 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);
+	    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;
+	    }
+#endif
+	}
+	retval = buf_write(curbuf, ffname, fname, eap->line1, eap->line2,
+				 eap, eap->append, eap->forceit, TRUE, FALSE);
+}
+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.
+*/
+/*ARGSUSED*/
+static 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))
+	    && !eap->forceit
+	    && !eap->append
+	    && !p_wa
+	    && vim_fexists(ffname))
+{
+#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[IOSIZE];
+	    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;
+	}
+}
+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.  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;
+{
+if (!*forceit && buf->b_p_ro)
+{
+#if defined(FEAT_GUI_DIALOG) || defined(FEAT_CON_DIALOG)
+	if ((p_confirm || cmdmod.confirm) && buf->b_fname != NULL)
+	{
+	    char_u	buff[IOSIZE];
+	    dialog_msg(buff, _("'readonly' option is set for \"%.*s\".\nDo you wish to write anyway?"),
+		    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
+	    EMSG(_(e_readonly));
+	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 succesfully 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;
+#ifdef FEAT_CMDWIN
+if (cmdwin_type != 0)
+	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)) == 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
+*
+* return FAIL for failure, OK otherwise
+*/
+int
+do_ecmd(fnum, ffname, sfname, eap, newlnum, flags)
+int		fnum;
+char_u	*ffname;
+char_u	*sfname;
+exarg_T	*eap;			/* can be NULL! */
+linenr_T	newlnum;
+int		flags;
+{
+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;
+#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;
+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)
+	{
+	    browse_file = do_browse(FALSE, (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
+	    fname_case(sfname, 0);   /* set correct case for short file name */
+#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
+/*
+* 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
+	{
+	    curwin->w_alt_fnum = curbuf->b_fnum;
+	    buflist_altfpos();
+	}
+	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 */
+		close_buffer(curwin, curbuf,
+				      (flags & ECMD_HIDE) ? 0 : DOBUF_UNLOAD);
+#ifdef FEAT_AUTOCMD
+# 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
+		{
+		    curwin->w_buffer = buf;
+		    curbuf = buf;
+		    ++curbuf->b_nwindows;
+		    /* set 'fileformat' */
+		    if (*p_ffs && !oldbuf)
+			set_fileformat(default_fileformat(), OPT_LOCAL);
+		}
+		/* 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(buf);
+#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);
+#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);
+	    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 */
+#ifdef FEAT_SCROLLBIND
+	curwin->w_p_scb = FALSE;	/* no scroll binding */
+#endif
+#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_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
+	buf_freeall(curbuf, FALSE, FALSE);   /* 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.
+	 */
+	win_init(curwin);
+#ifdef FEAT_FOLDING
+	/* It's like all lines in the buffer changed.  Need to update
+	 * automatic folding. */
+	foldUpdateAll(curwin);
+#endif
+#if defined(FEAT_SUN_WORKSHOP) || defined(FEAT_NETBEANS_INTG)
+	if (p_acd && curbuf->b_ffname != NULL
+				     && vim_chdirfile(curbuf->b_ffname) == OK)
+	    shorten_fnames(TRUE);
+#endif
+	/*
+	 * 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(FEAT_GUI_DIALOG) || defined(FEAT_CON_DIALOG)
+	    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)))
+		retval = FAIL;
+#else
+	    (void)open_buffer(FALSE, eap);
+#endif
+#if defined(FEAT_GUI_DIALOG) || defined(FEAT_CON_DIALOG)
+	    if (swap_exists_action == SEA_QUIT)
+		retval = FAIL;
+	    handle_swap_exists(old_curbuf);
+#endif
+	}
+#ifdef FEAT_AUTOCMD
+	else
+	{
+	    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. */
+diff_new_buffer();
+diff_invalidate();
+#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)
+	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;
+#if defined(FEAT_SUN_WORKSHOP) || defined(FEAT_NETBEANS_INTG)
+/* Change directories when the acd option is set on. */
+if (p_acd && curbuf->b_ffname != NULL
+				     && vim_chdirfile(curbuf->b_ffname) == OK)
+	shorten_fnames(TRUE);
+if (gui.in_use && curbuf->b_ffname != NULL)
+{
+# ifdef FEAT_SUN_WORKSHOP
+	if (usingSunWorkShop)
+	    workshop_file_opened((char *)curbuf->b_ffname, curbuf->b_p_ro);
+# endif
+# ifdef FEAT_NETBEANS_INTG
+	if (usingNetbeans)
+	    netbeans_file_opened((char *)curbuf->b_ffname);
+# endif
+}
+#endif
+theend:
+#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
+/*
+* ":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;
+if (eap->cmdidx != CMD_append)
+	--lnum;
+State = INSERT;		    /* behave like in Insert mode */
+if (curbuf->b_p_iminsert == B_IMODE_LMAP)
+	State |= LANGMAP;
+while (1)
+{
+	msg_scroll = TRUE;
+	need_wait_return = FALSE;
+	if (eap->getline == NULL)
+	    theline = getcmdline(
+#ifdef FEAT_EVAL
+		    eap->cstack->cs_whilelevel > 0 ? -1 :
+#endif
+		    NUL, 0L, 0);
+	else
+	    theline = eap->getline(
+#ifdef FEAT_EVAL
+		    eap->cstack->cs_whilelevel > 0 ? -1 :
+#endif
+		    NUL, eap->cookie, 0);
+	lines_left = Rows - 1;
+	if (theline == NULL || (theline[0] == '.' && theline[1] == NUL)
+		|| (!did_undo && u_save(lnum, lnum + 1) == FAIL))
+	{
+	    vim_free(theline);
+	    break;
+	}
+	did_undo = TRUE;
+	ml_append(lnum, theline, (colnr_T)0, FALSE);
+	appended_lines_mark(lnum, 1L);
+	vim_free(theline);
+	++lnum;
+	msg_didout = TRUE;	/* also scroll for empty line */
+}
+State = NORMAL;
+/* "start" is set to eap->line2+1 unless that position is invalid (when
+* eap->line2 pointed to the end of the buffer and nothig 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;
+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);
+}
+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 = curwin->w_height - 3;
+char_u	kind;
+int		numbered = FALSE;
+int		minus = 0;
+linenr_T	start, end, curs, i;
+int		j;
+linenr_T	lnum = eap->line2;
+if (bigness < 1)
+	bigness = 1;
+x = eap->arg;
+if (*x == '#')
+{
+	numbered = TRUE;
+	++x;
+}
+kind = *x;
+if (kind == '-' || kind == '+' || kind == '=' || kind == '^' || kind == '.')
+	++x;
+if (*x != 0)
+{
+	if (!VIM_ISDIGIT(*x))
+	{
+	    EMSG(_("E144: non-numeric argument to :z"));
+	    return;
+	}
+	else
+	    bigness = atoi((char *)x);
+}
+switch (kind)
+{
+	case '-':
+	    start = lnum - bigness;
+	    end = lnum;
+	    curs = lnum;
+	    break;
+	case '=':
+	    start = lnum - bigness / 2 + 1;
+	    end = lnum + bigness / 2 - 1;
+	    curs = lnum;
+	    minus = 1;
+	    break;
+	case '^':
+	    start = lnum - bigness * 2;
+	    end = lnum - bigness;
+	    curs = lnum - bigness;
+	    break;
+	case '.':
+	    start = lnum - bigness / 2;
+	    end = lnum + bigness / 2;
+	    curs = end;
+	    break;
+	default:  /* '+' */
+	    start = lnum;
+	    end = lnum + bigness;
+	    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, numbered);
+	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" */
+/*
+* When ":global" is used to number of substitutions and changed lines is
+* accumulated until it's finished.
+*/
+static long	sub_nsubs;	/* total number of substitutions */
+static linenr_T	sub_nlines;	/* total number of lines changed */
+/* 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_error = TRUE;	/* if false, ignore errors */
+static int	do_print = FALSE;	/* print last line with subs. */
+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 */
+linenr_T	sub_firstlnum;	/* nr of first sub line */
+char_u	*sub_firstline;	/* allocated copy of first sub line */
+cmd = eap->arg;
+if (!global_busy)
+{
+	sub_nsubs = 0;
+	sub_nlines = 0;
+}
+#ifdef FEAT_FKMAP	/* reverse the flow of the Farsi characters */
+if (p_altkeymap && curwin->w_p_rl)
+	lrF_sub(cmd);
+#endif
+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 */
+	{
+	    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;
+#ifdef FEAT_MBYTE
+	    if (has_mbyte)
+		cmd += (*mb_ptr2len_check)(cmd);
+	    else
+#endif
+		++cmd;
+	}
+	if (!eap->skip)
+	{
+	    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;
+}
+/*
+* 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_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 == '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 == 'i')	    /* ignore case */
+	    do_ic = 'i';
+	else if (*cmd == 'I')	    /* don't ignore case */
+	    do_ic = 'I';
+	else
+	    break;
+	++cmd;
+}
+/*
+* 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 (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)
+{
+	sub_firstlnum = lnum;
+	nmatch = vim_regexec_multi(&regmatch, curwin, curbuf, lnum, (colnr_T)0);
+	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;
+	    unsigned	len, needed_len;
+	    long	nmatch_tl = 0;	/* nr of lines matched below lnum */
+	    int		do_again;	/* do it again after joining lines */
+	    /*
+	     * The new text is build up step by step, to avoid too much
+	     * copying.  There are these pieces:
+	     * sub_firstline	The old text, unmodifed.
+	     * 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 were looking for the
+	     *			first match in the old line.
+	     * 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 lenght 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_firstline = vim_strsave(ml_get(sub_firstlnum));
+	    if (sub_firstline == NULL)
+	    {
+		vim_free(new_start);
+		goto outofmem;
+	    }
+	    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 (;;)
+	    {
+		/* 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)
+		{
+		    ++matchcol; /* search for a match at next column */
+		    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_ask is set, ask for confirmation.
+		 */
+		if (do_ask)
+		{
+		    /* 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)
+		    {
+#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;
+			search_match_lines = regmatch.endpos[0].lnum;
+			search_match_endcol = regmatch.endpos[0].col;
+			highlight_match = TRUE;
+			update_topline();
+			validate_cursor();
+			update_screen(NOT_VALID);
+			highlight_match = FALSE;
+			redraw_later(NOT_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 */
+			i = safe_vgetc();
+			--allow_keys;
+			--no_mapping;
+			/* clear the question */
+			msg_didout = FALSE;	/* don't scroll up */
+			msg_col = 0;
+			gotocmdline(TRUE);
+			need_wait_return = FALSE; /* no hit-return prompt */
+			if (i == 'q' || i == ESC || i == Ctrl_C
+#ifdef UNIX
+				|| i == intr_char
+#endif
+				)
+			{
+			    got_quit = TRUE;
+			    break;
+			}
+			if (i == 'n')
+			    break;
+			if (i == 'y')
+			    break;
+			if (i == 'l')
+			{
+			    /* last: replace and then stop */
+			    do_all = FALSE;
+			    line2 = lnum;
+			    break;
+			}
+			if (i == 'a')
+			{
+			    do_ask = FALSE;
+			    break;
+			}
+#ifdef FEAT_INS_EXPAND
+			if (i == Ctrl_E)
+			    scrollup_clamp();
+			else if (i == 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 (i == '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" get stuck. */
+			if (nmatch > 1)
+			{
+			    matchcol = STRLEN(sub_firstline);
+			    nmatch = 1;
+			}
+			goto skip;
+		    }
+		    if (got_quit)
+			break;
+		}
+		/* 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.
+		 */
+		/* get length of substitution part */
+		sublen = vim_regsub_multi(&regmatch, sub_firstlnum,
+				    sub, sub_firstline, FALSE, p_magic, 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;
+		}
+		i = regmatch.startpos[0].col - copycol;
+		needed_len = i + ((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 > 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)i);
+		new_end += i;
+		(void)vim_regsub_multi(&regmatch, sub_firstlnum,
+					   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;
+		/*
+		 * 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 */
+			mch_memmove(p1, p1 + 1, STRLEN(p1));
+		    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;
+			    STRCPY(new_start, p1 + 1);	/* copy the rest */
+			    p1 = new_start - 1;
+			}
+		    }
+#ifdef FEAT_MBYTE
+		    else if (has_mbyte)
+			p1 += (*mb_ptr2len_check)(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. */
+		lastone = ((sub_firstline[matchcol] == NUL && nmatch <= 1
+					   && !re_multiline(regmatch.regprog))
+			     || got_int || got_quit || !(do_all || do_again));
+		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 asking the user we like to show the already replaced
+		 * text, but don't do it when "\<@=" or "\<@!" is used, it
+		 * changes what matches.
+		 */
+		if (lastone
+			|| (do_ask && !re_lookbehind(regmatch.regprog))
+			|| nmatch_tl > 0
+			|| (nmatch = vim_regexec_multi(&regmatch, curwin,
+				       curbuf, sub_firstlnum, matchcol)) == 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);
+		    /*
+		     * 5. break if there isn't another match in this line
+		     */
+		    if (nmatch <= 0)
+			break;
+		}
+		line_breakcheck();
+	    }
+	    if (did_sub)
+		++sub_nlines;
+	    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 */
+if (sub_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)
+	{
+	    beginline(BL_WHITE | BL_FIX);
+	    if (!do_sub_msg() && do_ask)
+		MSG("");
+	}
+	else
+	    global_need_beginline = TRUE;
+	if (do_print)
+	    print_line(curwin->w_cursor.lnum, FALSE);
+}
+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());
+}
+vim_free(regmatch.regprog);
+}
+/*
+* Give message for number of substitutions.
+* Can also be used after a ":global" command.
+* Return TRUE if a message was given.
+*/
+static int
+do_sub_msg()
+{
+/*
+* 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)
+	    && messaging())
+{
+	if (got_int)
+	    STRCPY(msg_buf, _("(Interrupted) "));
+	else
+	    msg_buf[0] = NUL;
+	if (sub_nsubs == 1)
+	    STRCAT(msg_buf, _("1 substitution"));
+	else
+	    sprintf((char *)msg_buf + STRLEN(msg_buf), _("%ld substitutions"),
+								   sub_nsubs);
+	if (sub_nlines == 1)
+	    STRCAT(msg_buf, _(" on 1 line"));
+	else
+	    sprintf((char *)msg_buf + STRLEN(msg_buf), _(" on %ld lines"),
+							    (long)sub_nlines);
+	if (msg(msg_buf))
+	{
+	    /* save message to display it after redraw */
+	    set_keep_msg(msg_buf);
+	    keep_msg_attr = 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;
+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 */
+sub_nsubs = 0;
+sub_nlines = 0;
+/*
+* 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
+*/
+ndone = 0;
+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);
+	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')
+	    msg_str((char_u *)_("Pattern found in every line: %s"), pat);
+	else
+	    msg_str((char_u *)_(e_patnotf2), pat);
+}
+else
+	global_exe(cmd);
+ml_clearmarked();	   /* clear rest of the marks */
+vim_free(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 */
+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;
+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 */
+/* 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 subsitutes done, report number of substitues, otherwise report
+* number of extra or deleted lines. */
+if (!do_sub_msg())
+	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 (old_sub != NULL && 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)
+{
+	fprintf(fp, _("\n# Last Substitute String:\n$"));
+	viminfo_writestring(fp, old_sub);
+}
+}
+#endif /* FEAT_VIMINFO */
+#if (defined(FEAT_WINDOWS) && defined(FEAT_QUICKFIX)) || defined(PROTO)
+/*
+* Set up for a tagpreview.
+*/
+void
+prepare_tagpreview()
+{
+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, TRUE);
+	else
+	{
+	    /*
+	     * There is no preview window open yet.  Create one.
+	     */
+	    if (win_split(g_do_tagpreview > 0 ? g_do_tagpreview : 0, 0)
+								      == FAIL)
+		return;
+	    curwin->w_p_pvw = TRUE;
+	    curwin->w_p_wfh = TRUE;
+# ifdef FEAT_SCROLLBIND
+	    curwin->w_p_scb = FALSE;	    /* don't take over 'scrollbind' */
+# endif
+# ifdef FEAT_DIFF
+	    curwin->w_p_diff = FALSE;	    /* no 'diff' */
+# endif
+# ifdef FEAT_FOLDING
+	    curwin->w_p_fdc = 0;	    /* no 'foldcolumn' */
+# endif
+	}
+}
+}
+#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 = NULL;
+#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)
+	{
+	    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 */
+len = STRLEN(arg);
+if (len >= 3 && arg[len - 3] == '@' && ASCII_ISALPHA(arg[len - 2])
+					       && ASCII_ISALPHA(arg[len - 1]))
+{
+	lang = arg + len - 2;
+	lang[-1] = NUL;		/* remove the '@' */
+}
+#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 = 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.
+*/
+if (!curwin->w_buffer->b_help)
+{
+#ifdef FEAT_WINDOWS
+	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)
+	    {
+		msg_str((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)
+#else
+	    /* use current window */
+	    if (!can_abandon(curbuf, FALSE))
+#endif
+		goto erret;
+#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);
+	    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 */
+if (tag != NULL)
+	do_tag(tag, DT_HELP, 1, FALSE, TRUE);
+/* Delete the empty buffer if we're not using it. */
+if (empty_fnum != 0 && curbuf->b_fnum != empty_fnum)
+{
+	buf = buflist_findnr(empty_fnum);
+	if (buf != NULL)
+	    wipe_buffer(buf, TRUE);
+}
+/* keep the previous alternate file */
+if (alt_fnum != 0 && curwin->w_alt_fnum == empty_fnum)
+	curwin->w_alt_fnum = alt_fnum;
+erret:
+vim_free(tag);
+}
+/*
+* 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*", "[*", "]*", ":*",
+			       "/*", "/\\*", "\"*", "/\\(\\)",
+			       "?", ":?", "?<CR>", "g?", "g?g?", "g??",
+			       "/\\?", "/\\z(\\)",
+			       "[count]", "[quotex]", "[range]",
+			       "[pattern]", "\\|", "\\%$"};
+static char *(rtable[]) = {"star", "gstar", "[star", "]star", ":star",
+			       "/star", "/\\\\star", "quotestar", "/\\\\(\\\\)",
+			       "?", ":?", "?<CR>", "g?", "g?g?", "g??",
+			       "/\\\\?", "/\\\\z(\\\\)",
+			       "\\[count]", "\\[quotex]", "\\[range]",
+			       "\\[pattern]", "\\\\bar", "/\\\\%\\$"};
+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 = 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 "\[++...]" */
+	    if (arg[0] == '[' && (arg[1] == ':'
+					 || (arg[1] == '+' && arg[2] == '+')))
+	      *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++ = '_';		/* prepend a '_' */
+		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;
+	}
+}
+*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);
+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	*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(curbuf))
+#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" file, add the locally added help files.
+* This uses the very first line in the help file.
+*/
+if (fnamecmp(gettail(curbuf->b_fname), "help.txt") == 0)
+{
+	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)
+	    {
+		/* 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);
+			STRCAT(NameBuff, "doc/*.txt");
+			if (gen_expand_wildcards(1, &NameBuff, &fcount,
+					     &fnames, EW_FILE|EW_SILENT) == OK
+				&& fcount > 0)
+			{
+			    for (fi = 0; fi < fcount; ++fi)
+			    {
+				fd = 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_check(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;
+	    }
+	}
+}
+}
+#if defined(FEAT_EX_EXTRA) || defined(PROTO)
+static void helptags_one __ARGS((char_u *dir, char_u *ext, char_u *lang));
+/*
+* ":helptags"
+*/
+void
+ex_helptags(eap)
+exarg_T	*eap;
+{
+garray_T	ga;
+int		i, j;
+int		len;
+char_u	lang[2];
+char_u	ext[5];
+char_u	fname[8];
+int		filecount;
+char_u	**files;
+if (!mch_isdir(eap->arg))
+{
+	EMSG2(_("E150: Not a directory: %s"), eap->arg);
+	return;
+}
+#ifdef FEAT_MULTI_LANG
+/* Get a list of all files in the directory. */
+STRCPY(NameBuff, eap->arg);
+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);
+	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 = 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];
+		ga.ga_room -= 2;
+	    }
+	}
+}
+/*
+* 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(eap->arg, ext, fname);
+}
+ga_clear(&ga);
+FreeWild(filecount, files);
+#else
+/* No language support, just use "*.txt" and "tags". */
+helptags_one(eap->arg, (char_u *)".txt", (char_u *)"tags");
+#endif
+}
+static void
+helptags_one(dir, ext, tagfname)
+char_u	*dir;	    /* doc directory */
+char_u	*ext;	    /* suffix, ".txt", ".itx", ".frx", etc. */
+char_u	*tagfname;    /* "tags" for English, "tags-it" for Italian. */
+{
+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;
+# ifdef FEAT_MBYTE
+int		utf8 = MAYBE;
+int		this_utf8;
+int		firstline;
+int		mix = FALSE;	/* detected mixed encodings */
+# endif
+/*
+* Find all *.txt files.
+*/
+STRCPY(NameBuff, dir);
+add_pathsep(NameBuff);
+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 = fopen((char *)NameBuff, "w");
+if (fd_tags == NULL)
+{
+	EMSG2(_("E152: Cannot open %s for writing"), NameBuff);
+	FreeWild(filecount, files);
+	return;
+}
+/*
+* If generating tags for "$VIMRUNTIME/doc" add the "help-tags" tag.
+*/
+ga_init2(&ga, (int)sizeof(char_u *), 100);
+if (fullpathcmp((char_u *)"$VIMRUNTIME/doc", dir, FALSE) == FPC_SAME)
+{
+	if (ga_grow(&ga, 1) == FAIL)
+	    got_int = TRUE;
+	else
+	{
+	    s = alloc(30);
+	    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;
+		--ga.ga_room;
+	    }
+	}
+}
+/*
+* Go over all the files and extract the tags.
+*/
+for (fi = 0; fi < filecount && !got_int; ++fi)
+{
+	fd = fopen((char *)files[fi], "r");
+	if (fd == NULL)
+	{
+	    EMSG2(_("E153: Unable to open %s for reading"), files[fi]);
+	    continue;
+	}
+	fname = gettail(files[fi]);
+# 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_check(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)
+	    {
+		p2 = vim_strchr(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;
+			--ga.ga_room;
+			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;
+		    sprintf((char *)NameBuff,
+			    _("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", 9) == 0)
+		/* help-tags entry was added in formatted form */
+		fprintf(fd_tags, (char *)s);
+	    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 (negative if not equal
+				   to name) */
+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 */
+};
+#define MAX_TYPENR 255		/* depends on sattr_T */
+static sign_T	*first_sign = NULL;
+static int	last_sign_typenr = MAX_TYPENR;	/* is decremented */
+static void sign_list_defined __ARGS((sign_T *sp));
+/*
+* ":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;
+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
+#define SIGNCMD_LAST	6
+};
+/* Parse the subcommand. */
+p = skiptowhite(arg);
+if (*p != NUL)
+	*p++ = NUL;
+for (idx = 0; ; ++idx)
+{
+	if (idx == SIGNCMD_LAST)
+	{
+	    EMSG2(_("E160: Unknown sign command: %s"), arg);
+	    return;
+	}
+	if (STRCMP(arg, cmds[idx]) == 0)
+	    break;
+}
+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; sp = sp->sn_next)
+		sign_list_defined(sp);
+	}
+	else if (*arg == NUL)
+	    EMSG(_("E156: Missing sign name"));
+	else
+	{
+	    p = skiptowhite(arg);
+	    if (*p != NUL)
+		*p++ = NUL;
+	    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)
+		{
+		    /* Allocate a new sign. */
+		    sp = (sign_T *)alloc_clear((unsigned)sizeof(sign_T));
+		    if (sp == NULL)
+			return;
+		    if (sp_prev == NULL)
+			first_sign = sp;
+		    else
+			sp_prev->sn_next = sp;
+		    sp->sn_name = vim_strnsave(arg, (int)(p - arg));
+		    /* If the name is a number use that for the typenr,
+		     * otherwise use a negative number. */
+		    if (VIM_ISDIGIT(*arg))
+			sp->sn_typenr = atoi((char *)arg);
+		    else
+		    {
+			sign_T	*lp;
+			int	start = last_sign_typenr;
+			for (lp = first_sign; lp != NULL; lp = lp->sn_next)
+			{
+			    if (lp->sn_typenr == last_sign_typenr)
+			    {
+				--last_sign_typenr;
+				if (last_sign_typenr == 0)
+				    last_sign_typenr = MAX_TYPENR;
+				if (last_sign_typenr == start)
+				{
+				    EMSG(_("E612: Too many signs defined"));
+				    return;
+				}
+				lp = first_sign;
+				continue;
+			    }
+			}
+			sp->sn_typenr = last_sign_typenr--;
+			if (last_sign_typenr == 0)
+			    last_sign_typenr = MAX_TYPENR; /* wrap around */
+		    }
+		}
+		/* 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_check)(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 = 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 = 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}" */
+		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);
+	    }
+	}
+}
+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, "name=", 5) == 0)
+	    {
+		arg += 5;
+		sign_name = arg;
+		arg = skiptowhite(arg);
+		if (*arg != NUL)
+		    *arg++ = NUL;
+	    }
+	    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)
+	{
+	    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)
+	{
+	    /* ":sign unplace {id} file={fname}" */
+	    if (lnum >= 0 || sign_name != NULL)
+		EMSG(_(e_invarg));
+	    else
+	    {
+		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);
+}
+}
+/*
+* 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]");
+}
+#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;
+int		incurwin = FALSE;
+char_u	*arg;
+char_u	*first = NULL;
+win_T	*wp;
+buf_T	*buf;
+/*
+* 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.
+*/
+arg = vim_strsave(eap->arg);
+if (arg != NULL)
+{
+	/* Get the first argument, remove quotes, make it a full path. */
+	first = fix_fname(arg);
+	if (first != NULL)
+	{
+	    buf = buflist_findname(first);
+	    FOR_ALL_WINDOWS(wp)
+	    {
+		if (wp->w_buffer == buf)
+		{
+		    incurwin = TRUE;
+# ifdef FEAT_WINDOWS
+		    win_enter(wp, TRUE);
+		    break;
+# endif
+		}
+	    }
+	    vim_free(first);
+	    if (incurwin)
+	    {
+		/* Already editing the file.  Redefine the argument list. */
+		set_arglist(eap->arg);
+		curwin->w_arg_idx = 0;
+		vim_free(arg);
+		return;
+	    }
+	}
+	vim_free(arg);
+}
+/*
+* 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 ":snext" or ":next" command, redefine the arglist. */
+if (split)
+{
+	eap->cmdidx = CMD_snext;
+	eap->cmd[0] = 's';
+}
+else
+	eap->cmdidx = CMD_next;
+ex_next(eap);
+}
+#endif

Mercurial > vim

comparison src/ex_cmds.c @ 7:3fc0f57ecb91 v7.0001