/*	$OpenBSD: misccmds.c,v 1.3 1996/09/22 01:18:04 downsj Exp $	*/
/* vi:set ts=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.
 */

/*
 * misccmds.c: functions that didn't seem to fit elsewhere
 */

#include "vim.h"
#include "globals.h"
#include "proto.h"
#include "option.h"
#ifdef HAVE_FCNTL_H
# include <fcntl.h>			/* for chdir() */
#endif

static int get_indent_str __ARGS((char_u *ptr));
static void check_status __ARGS((BUF *));

/*
 * count the size of the indent in the current line
 */
	int
get_indent()
{
	return get_indent_str(ml_get_curline());
}

/*
 * count the size of the indent in line "lnum"
 */
	int
get_indent_lnum(lnum)
	linenr_t	lnum;
{
	return get_indent_str(ml_get(lnum));
}

/*
 * count the size of the indent in line "ptr"
 */
	static int
get_indent_str(ptr)
	register char_u *ptr;
{
	register int count = 0;

	for ( ; *ptr; ++ptr)
	{
		if (*ptr == TAB)	/* count a tab for what it is worth */
			count += (int)curbuf->b_p_ts - (count % (int)curbuf->b_p_ts);
		else if (*ptr == ' ')
			++count;			/* count a space for one */
		else
			break;
	}
	return (count);
}

/*
 * set the indent of the current line
 * leaves the cursor on the first non-blank in the line
 */
	void
set_indent(size, del_first)
	register int	size;
	int 			del_first;
{
	int				oldstate = State;
	register int	c;

	State = INSERT;					/* don't want REPLACE for State */
	curwin->w_cursor.col = 0;
	if (del_first)					/* delete old indent */
	{
									/* vim_iswhite() is a define! */
		while ((c = gchar_cursor()), vim_iswhite(c))
			(void)delchar(FALSE);
	}
	if (!curbuf->b_p_et)			/* if 'expandtab' is set, don't use TABs */
		while (size >= (int)curbuf->b_p_ts)
		{
			ins_char(TAB);
			size -= (int)curbuf->b_p_ts;
		}
	while (size)
	{
		ins_char(' ');
		--size;
	}
	State = oldstate;
}

#if defined(CINDENT) || defined(SMARTINDENT)

static int is_cinword __ARGS((char_u *line));

/*
 * Return TRUE if the string "line" starts with a word from 'cinwords'.
 */
	static int
is_cinword(line)
	char_u		*line;
{
	char_u	*cinw;
	char_u	*cinw_buf;
	int		cinw_len;
	int		retval = FALSE;
	int		len;

	cinw_len = STRLEN(curbuf->b_p_cinw) + 1;
	cinw_buf = alloc((unsigned)cinw_len);
	if (cinw_buf != NULL)
	{
		line = skipwhite(line);
		for (cinw = curbuf->b_p_cinw; *cinw; )
		{
			len = copy_option_part(&cinw, cinw_buf, cinw_len, ",");
			if (STRNCMP(line, cinw_buf, len) == 0 &&
					   (!iswordchar(line[len]) || !iswordchar(line[len - 1])))
			{
				retval = TRUE;
				break;
			}
		}
		vim_free(cinw_buf);
	}
	return retval;
}
#endif

/*
 * Opencmd
 *
 * Add a new line below or above the current line.
 * Caller must take care of undo.
 *
 * Return TRUE for success, FALSE for failure
 */

	int
Opencmd(dir, redraw, del_spaces)
	int 		dir;			/* FORWARD or BACKWARD */
	int			redraw;			/* redraw afterwards */
	int			del_spaces;		/* delete spaces after cursor */
{
	char_u  *saved_line;		/* copy of the original line */
	char_u	*p_extra = NULL;	/* what goes to next line */
	int		extra_len = 0;		/* length of p_extra string */
	FPOS	old_cursor; 		/* old cursor position */
	int		newcol = 0;			/* new cursor column */
	int 	newindent = 0;		/* auto-indent of the new line */
	int		n;
	int		trunc_line = FALSE;	/* truncate current line afterwards */
	int		retval = FALSE;		/* return value, default is FAIL */
	int		lead_len;			/* length of comment leader */
	char_u	*lead_flags;		/* position in 'comments' for comment leader */
	char_u	*leader = NULL;		/* copy of comment leader */
	char_u	*allocated = NULL;	/* allocated memory */
	char_u	*p;
	int		saved_char = NUL;	/* init for GCC */
	FPOS	*pos;
	int		old_plines = 0;		/* init for GCC */
	int		new_plines = 0;		/* init for GCC */
#ifdef SMARTINDENT
	int		no_si = FALSE;		/* reset did_si afterwards */
	int		first_char = NUL;	/* init for GCC */
#endif

	/*
	 * make a copy of the current line so we can mess with it
	 */
	saved_line = strsave(ml_get_curline());
	if (saved_line == NULL)			/* out of memory! */
		return FALSE;

	if (State == INSERT || State == REPLACE)
	{
		p_extra = saved_line + curwin->w_cursor.col;
#ifdef SMARTINDENT
		if (curbuf->b_p_si)			/* need first char after new line break */
		{
			p = skipwhite(p_extra);
			first_char = *p;
		}
#endif
		extra_len = STRLEN(p_extra);
		saved_char = *p_extra;
		*p_extra = NUL;
	}

	u_clearline();				/* cannot do "U" command when adding lines */
#ifdef SMARTINDENT
	did_si = FALSE;
#endif

	/*
	 * If 'autoindent' and/or 'smartindent' is set, try to figure out what
	 * indent to use for the new line.
	 */
	if (curbuf->b_p_ai
#ifdef SMARTINDENT
						|| curbuf->b_p_si
#endif
											)
	{
		/*
		 * count white space on current line
		 */
		newindent = get_indent();
		if (newindent == 0)
			newindent = old_indent;		/* for ^^D command in insert mode */
		old_indent = 0;

		/*
		 * If we just did an auto-indent, then we didn't type anything on
		 * the prior line, and it should be truncated.
		 */
		if (dir == FORWARD && did_ai)
			trunc_line = TRUE;

#ifdef SMARTINDENT
		/*
		 * Do smart indenting.
		 * In insert/replace mode (only when dir == FORWARD)
		 * we may move some text to the next line. If it starts with '{'
		 * don't add an indent. Fixes inserting a NL before '{' in line
		 * 		"if (condition) {"
		 */
		else if (curbuf->b_p_si && *saved_line != NUL &&
									   (p_extra == NULL || first_char != '{'))
		{
			char_u	*ptr;
			char_u	last_char;

			old_cursor = curwin->w_cursor;
			ptr = saved_line;
			lead_len = get_leader_len(ptr, NULL);
			if (dir == FORWARD)
			{
				/*
				 * Skip preprocessor directives, unless they are
				 * recognised as comments.
				 */
				if (lead_len == 0 && ptr[0] == '#')
				{
					while (ptr[0] == '#' && curwin->w_cursor.lnum > 1)
						ptr = ml_get(--curwin->w_cursor.lnum);
					newindent = get_indent();
				}
				lead_len = get_leader_len(ptr, NULL);
				if (lead_len > 0)
				{
					/*
					 * This case gets the following right:
					 *		\*
					 *		 * A comment (read "\" as "/").
					 *		 *\
					 * #define IN_THE_WAY
					 *		This should line up here;
					 */
					p = skipwhite(ptr);
					if (p[0] == '/' && p[1] == '*')
						p++;
					if (p[0] == '*')
					{
						for (p++; *p; p++)
						{
							if (p[0] == '/' && p[-1] == '*')
							{
								/*
								 * End of C comment, indent should line up
								 * with the line containing the start of
								 * the comment
								 */
								curwin->w_cursor.col = p - ptr;
								if ((pos = findmatch(NUL)) != NULL)
								{
									curwin->w_cursor.lnum = pos->lnum;
									newindent = get_indent();
								}
							}
						}
					}
				}
				else	/* Not a comment line */
				{
					/* Find last non-blank in line */
					p = ptr + STRLEN(ptr) - 1;
					while (p > ptr && vim_iswhite(*p))
						--p;
					last_char = *p;

					/*
					 * find the character just before the '{' or ';'
					 */
					if (last_char == '{' || last_char == ';')
					{
						if (p > ptr)
							--p;
						while (p > ptr && vim_iswhite(*p))
							--p;
					}
					/*
					 * Try to catch lines that are split over multiple
					 * lines.  eg:
					 *		if (condition &&
					 *					condition) {
					 *			Should line up here!
					 *		}
					 */
					if (*p == ')')
					{
						curwin->w_cursor.col = p - ptr;
						if ((pos = findmatch('(')) != NULL)
						{
							curwin->w_cursor.lnum = pos->lnum;
							newindent = get_indent();
							ptr = ml_get_curline();
						}
					}
					/*
					 * If last character is '{' do indent, without
					 * checking for "if" and the like.
					 */
					if (last_char == '{')
					{
						did_si = TRUE;	/* do indent */
						no_si = TRUE;	/* don't delete it when '{' typed */
					}
					/*
					 * Look for "if" and the like, use 'cinwords'.
					 * Don't do this if the previous line ended in ';' or
					 * '}'.
					 */
					else if (last_char != ';' && last_char != '}' &&
															is_cinword(ptr))
						did_si = TRUE;
				}
			}
			else /* dir == BACKWARD */
			{
				/*
				 * Skip preprocessor directives, unless they are
				 * recognised as comments.
				 */
				if (lead_len == 0 && ptr[0] == '#')
				{
					int was_backslashed = FALSE;

					while ((ptr[0] == '#' || was_backslashed) &&
						 curwin->w_cursor.lnum < curbuf->b_ml.ml_line_count)
					{
						if (*ptr && ptr[STRLEN(ptr) - 1] == '\\')
							was_backslashed = TRUE;
						else
							was_backslashed = FALSE;
						ptr = ml_get(++curwin->w_cursor.lnum);
					}
					if (was_backslashed)
						newindent = 0;		/* Got to end of file */
					else
						newindent = get_indent();
				}
				p = skipwhite(ptr);
				if (*p == '}')		/* if line starts with '}': do indent */
					did_si = TRUE;
				else				/* can delete indent when '{' typed */
					can_si_back = TRUE;
			}
			curwin->w_cursor = old_cursor;
		}
		if (curbuf->b_p_si)
			can_si = TRUE;
#endif /* SMARTINDENT */

		did_ai = TRUE;
	}
	
	/*
	 * Find out if the current line starts with a comment leader.
	 * This may then be inserted in front of the new line.
	 */
	lead_len = get_leader_len(saved_line, &lead_flags);
	if (lead_len > 0)
	{
		char_u	*lead_repl = NULL;			/* replaces comment leader */
		int		lead_repl_len = 0;			/* length of *lead_repl */
		char_u	lead_middle[COM_MAX_LEN];	/* middle-comment string */
		char_u	lead_end[COM_MAX_LEN];		/* end-comment string */
		char_u	*comment_end = NULL;		/* where lead_end has been found */
		int		extra_space = FALSE;		/* append extra space */
		int		current_flag;

		/*
		 * If the comment leader has the start, middle or end flag, it may not
		 * be used or may be replaced with the middle leader.
		 */
		for (p = lead_flags; *p && *p != ':'; ++p)
		{
			if (*p == COM_START || *p == COM_MIDDLE)
			{
				current_flag = *p;
				if (*p == COM_START)
				{
					/*
					 * Doing "O" on a start of comment does not insert leader.
					 */
					if (dir == BACKWARD)
					{
						lead_len = 0;
						break;
					}

				   /* find start of middle part */
					(void)copy_option_part(&p, lead_middle, COM_MAX_LEN, ",");
				}

				/*
				 * Isolate the strings of the middle and end leader.
				 */
				while (*p && p[-1] != ':')		/* find end of middle flags */
					++p;
				(void)copy_option_part(&p, lead_middle, COM_MAX_LEN, ",");
				while (*p && p[-1] != ':')		/* find end of end flags */
					++p;
				(void)copy_option_part(&p, lead_end, COM_MAX_LEN, ",");

				/*
				 * If the end of the comment is in the same line, don't use
				 * the comment leader.
				 */
				if (dir == FORWARD)
				{
					n = STRLEN(lead_end);
					for (p = saved_line + lead_len; *p; ++p)
						if (STRNCMP(p, lead_end, n) == 0)
						{
							comment_end = p;
							lead_len = 0;
							break;
						}
				}

				/*
				 * Doing "o" on a start of comment inserts the middle leader.
				 */
				if (lead_len)
				{
					if (current_flag == COM_START)
					{
						lead_repl = lead_middle;
						lead_repl_len = STRLEN(lead_middle);
					}

					/*
					 * If we have hit RETURN immediately after the start
					 * comment leader, then put a space after the middle
					 * comment leader on the next line.
					 */
					if (!vim_iswhite(saved_line[lead_len - 1]) &&
							((p_extra != NULL &&
									 (int)curwin->w_cursor.col == lead_len) ||
							 (p_extra == NULL && saved_line[lead_len] == NUL)))
						extra_space = TRUE;
				}
				break;
			}
			if (*p == COM_END)
			{
				/*
				 * Doing "o" on the end of a comment does not insert leader.
				 * Remember where the end is, might want to use it to find the
				 * start (for C-comments).
				 */
				if (dir == FORWARD)
				{
					comment_end = skipwhite(saved_line);
					lead_len = 0;
					break;
				}

				/*
				 * Doing "O" on the end of a comment inserts the middle leader.
				 * Find the string for the middle leader, searching backwards.
				 */
				while (p > curbuf->b_p_com && *p != ',')
					--p;
				for (lead_repl = p; lead_repl > curbuf->b_p_com &&
											lead_repl[-1] != ':'; --lead_repl)
					;
				lead_repl_len = p - lead_repl;
				break;
			}
			if (*p == COM_FIRST)
			{
				/*
				 * Comment leader for first line only:  Don't repeat leader
				 * when using "O", blank out leader when using "o".
				 */
				if (dir == BACKWARD)
					lead_len = 0;
				else
				{
					lead_repl = (char_u *)"";
					lead_repl_len = 0;
				}
				break;
			}
		}
		if (lead_len)
		{
			/* allocate buffer (may concatenate p_exta later) */
			leader = alloc(lead_len + lead_repl_len + extra_space +
															  extra_len + 1);
			allocated = leader;				/* remember to free it later */

			if (leader == NULL)
				lead_len = 0;
			else
			{
				STRNCPY(leader, saved_line, lead_len);
				leader[lead_len] = NUL;

				/*
				 * Replace leader with lead_repl, right or left adjusted
				 */
				if (lead_repl != NULL)
				{
					for (p = lead_flags; *p && *p != ':'; ++p)
						if (*p == COM_RIGHT || *p == COM_LEFT)
							break;
					if (*p == COM_RIGHT)	/* right adjusted leader */
					{
						/* find last non-white in the leader to line up with */
						for (p = leader + lead_len - 1; p > leader &&
														 vim_iswhite(*p); --p)
							;

						++p;
						if (p < leader + lead_repl_len)
							p = leader;
						else
							p -= lead_repl_len;
						vim_memmove(p, lead_repl, (size_t)lead_repl_len);
						if (p + lead_repl_len > leader + lead_len)
							p[lead_repl_len] = NUL;

						/* blank-out any other chars from the old leader. */
						while (--p >= leader)
							if (!vim_iswhite(*p))
								*p = ' ';
					}
					else 					/* left adjusted leader */
					{
						p = skipwhite(leader);
						vim_memmove(p, lead_repl, (size_t)lead_repl_len);

						/* blank-out any other chars from the old leader. */
						for (p += lead_repl_len; p < leader + lead_len; ++p)
							if (!vim_iswhite(*p))
								*p = ' ';
						*p = NUL;
					}

					/* Recompute the indent, it may have changed. */
					if (curbuf->b_p_ai
#ifdef SMARTINDENT
										|| curbuf->b_p_si
#endif
														   )
						newindent = get_indent_str(leader);
				}

				lead_len = STRLEN(leader);
				if (extra_space)
				{
					leader[lead_len++] = ' ';
					leader[lead_len] = NUL;
				}

				newcol = lead_len;

				/*
				 * if a new indent will be set below, remove the indent that
				 * is in the comment leader
				 */
				if (newindent
#ifdef SMARTINDENT
								|| did_si
#endif
										   )
				{
					while (lead_len && vim_iswhite(*leader))
					{
						--lead_len;
						--newcol;
						++leader;
					}
				}

			}
#ifdef SMARTINDENT
			did_si = can_si = FALSE;
#endif
		}
		else if (comment_end != NULL)
		{
			/*
			 * We have finished a comment, so we don't use the leader.
			 * If this was a C-comment and 'ai' or 'si' is set do a normal
			 * indent to align with the line containing the start of the
			 * comment.
			 */
			if (comment_end[0] == '*' && comment_end[1] == '/' &&
						(curbuf->b_p_ai
#ifdef SMARTINDENT
										|| curbuf->b_p_si
#endif
														   ))
			{
				old_cursor = curwin->w_cursor;
				curwin->w_cursor.col = comment_end - saved_line;
				if ((pos = findmatch(NUL)) != NULL)
				{
					curwin->w_cursor.lnum = pos->lnum;
					newindent = get_indent();
				}
				curwin->w_cursor = old_cursor;
			}
		}
	}

	/* (State == INSERT || State == REPLACE), only when dir == FORWARD */
	if (p_extra != NULL)
	{
		*p_extra = saved_char;			/* restore char that NUL replaced */

		/*
		 * When 'ai' set or "del_spaces" TRUE, skip to the first non-blank.
		 *
		 * When in REPLACE mode, put the deleted blanks on the replace
		 * stack, followed by a NUL, so they can be put back when
		 * a BS is entered.
		 */
		if (State == REPLACE)
			replace_push(NUL);		/* end of extra blanks */
		if (curbuf->b_p_ai || del_spaces)
		{
			while (*p_extra == ' ' || *p_extra == '\t')
			{
				if (State == REPLACE)
					replace_push(*p_extra);
				++p_extra;
			}
		}
		if (*p_extra != NUL)
			did_ai = FALSE; 		/* append some text, don't trucate now */
	}

	if (p_extra == NULL)
		p_extra = (char_u *)"";				/* append empty line */

	/* concatenate leader and p_extra, if there is a leader */
	if (lead_len)
	{
		STRCAT(leader, p_extra);
		p_extra = leader;
	}

	old_cursor = curwin->w_cursor;
	if (dir == BACKWARD)
		--curwin->w_cursor.lnum;
	if (ml_append(curwin->w_cursor.lnum, p_extra, (colnr_t)0, FALSE) == FAIL)
		goto theend;
	mark_adjust(curwin->w_cursor.lnum + 1, MAXLNUM, 1L, 0L);
	if (newindent
#ifdef SMARTINDENT
					|| did_si
#endif
								)
	{
		++curwin->w_cursor.lnum;
#ifdef SMARTINDENT
		if (did_si)
		{
			if (p_sr)
				newindent -= newindent % (int)curbuf->b_p_sw;
			newindent += (int)curbuf->b_p_sw;
		}
#endif
		set_indent(newindent, FALSE);
		/*
		 * In REPLACE mode the new indent must be put on
		 * the replace stack for when it is deleted with BS
		 */
		if (State == REPLACE)
			for (n = 0; n < (int)curwin->w_cursor.col; ++n)
				replace_push(NUL);
		newcol += curwin->w_cursor.col;
#ifdef SMARTINDENT
		if (no_si)
			did_si = FALSE;
#endif
	}
	/*
	 * In REPLACE mode the extra leader must be put on the replace stack for
	 * when it is deleted with BS.
	 */
	if (State == REPLACE)
		while (lead_len-- > 0)
			replace_push(NUL);

	curwin->w_cursor = old_cursor;

	if (dir == FORWARD)
	{
		if (redraw)		/* want to know the old number of screen lines */
		{
			old_plines = plines(curwin->w_cursor.lnum);
			new_plines = old_plines;
		}
		if (trunc_line || State == INSERT || State == REPLACE)
		{
			if (trunc_line)
			{
					/* find start of trailing white space */
				for (n = STRLEN(saved_line); n > 0 &&
										  vim_iswhite(saved_line[n - 1]); --n)
					;
				saved_line[n] = NUL;
			}
			else					/* truncate current line at cursor */
				*(saved_line + curwin->w_cursor.col) = NUL;
			ml_replace(curwin->w_cursor.lnum, saved_line, FALSE);
			saved_line = NULL;
			new_plines = plines(curwin->w_cursor.lnum);
		}

		/*
		 * Get the cursor to the start of the line, so that 'curwin->w_row'
		 * gets set to the right physical line number for the stuff that
		 * follows...
		 */
		curwin->w_cursor.col = 0;

		if (redraw)
		{
			/*
			 * Call cursupdate() to compute w_row.
			 * But we don't want it to update the srceen.
			 */
			++RedrawingDisabled;
			cursupdate();
			--RedrawingDisabled;

			/*
			 * If we're doing an open on the last logical line, then go ahead
			 * and scroll the screen up. Otherwise, just insert a blank line
			 * at the right place if the number of screen lines changed.
			 * We use calls to plines() in case the cursor is resting on a
			 * long line, we want to know the row below the line.
			 */
			n = curwin->w_row + new_plines;
			if (n == curwin->w_winpos + curwin->w_height)
				scrollup(1L);
			else
				win_ins_lines(curwin, n,
				  plines(curwin->w_cursor.lnum + 1) + new_plines - old_plines,
																  TRUE, TRUE);
		}

		/*
		 * Put the cursor on the new line.  Careful: the cursupdate() and
		 * scrollup() above may have moved w_cursor, we must use old_cursor.
		 */
		curwin->w_cursor.lnum = old_cursor.lnum + 1;
	}
	else if (redraw) 			/* insert physical line above current line */
		win_ins_lines(curwin, curwin->w_row, 1, TRUE, TRUE);

	curwin->w_cursor.col = newcol;

#ifdef LISPINDENT
	/*
	 * May do lisp indenting.
	 */
	if (leader == NULL && curbuf->b_p_lisp && curbuf->b_p_ai)
		fixthisline(get_lisp_indent);
#endif
#ifdef CINDENT
	/*
	 * May do indenting after opening a new line.
	 */
	if (leader == NULL && curbuf->b_p_cin &&
			in_cinkeys(dir == FORWARD ? KEY_OPEN_FORW :
						KEY_OPEN_BACK, ' ', linewhite(curwin->w_cursor.lnum)))
		fixthisline(get_c_indent);
#endif

	if (redraw)
	{
		updateScreen(VALID_TO_CURSCHAR);
		cursupdate();			/* update curwin->w_row */
	}
	CHANGED;

	retval = TRUE;				/* success! */
theend:
	vim_free(saved_line);
	vim_free(allocated);
	return retval;
}

/*
 * get_leader_len() returns the length of the prefix of the given string
 * which introduces a comment.  If this string is not a comment then 0 is
 * returned.
 * When "flags" is non-zero, it is set to point to the flags of the recognized
 * comment leader.
 */
	int
get_leader_len(line, flags)
	char_u	*line;
	char_u	**flags;
{
	int		i, j;
	int		got_com = FALSE;
	int		found_one;
	char_u	part_buf[COM_MAX_LEN];	/* buffer for one option part */
	char_u	*string;				/* pointer to comment string */
	char_u	*list;

	if (!fo_do_comments)			/* don't format comments at all */
		return 0;

	i = 0;
	while (vim_iswhite(line[i]))	/* leading white space is ignored */
		++i;

	/*
	 * Repeat to match several nested comment strings.
	 */
	while (line[i])
	{
		/*
		 * scan through the 'comments' option for a match
		 */
		found_one = FALSE;
		for (list = curbuf->b_p_com; *list; )
		{
			/*
			 * Get one option part into part_buf[].  Advance list to next one.
			 * put string at start of string.
			 */
			if (!got_com && flags != NULL)	/* remember where flags started */
				*flags = list;
			(void)copy_option_part(&list, part_buf, COM_MAX_LEN, ",");
			string = vim_strchr(part_buf, ':');
			if (string == NULL)		/* missing ':', ignore this part */
				continue;
			*string++ = NUL;		/* isolate flags from string */

			/*
			 * When already found a nested comment, only accept further
			 * nested comments.
			 */
			if (got_com && vim_strchr(part_buf, COM_NEST) == NULL)
				continue;

			/*
			 * Line contents and string must match.
			 */
			for (j = 0; string[j] != NUL && string[j] == line[i + j]; ++j)
				;
			if (string[j] != NUL)
				continue;

			/*
			 * When 'b' flag used, there must be white space or an
			 * end-of-line after the string in the line.
			 */
			if (vim_strchr(part_buf, COM_BLANK) != NULL &&
							  !vim_iswhite(line[i + j]) && line[i + j] != NUL)
				continue;

			/*
			 * We have found a match, stop searching.
			 */
			i += j;
			got_com = TRUE;
			found_one = TRUE;
			break;
		}

		/*
		 * No match found, stop scanning.
		 */
		if (!found_one)
			break;

		/*
		 * Include any trailing white space.
		 */
		while (vim_iswhite(line[i]))
			++i;

		/*
		 * If this comment doesn't nest, stop here.
		 */
		if (vim_strchr(part_buf, COM_NEST) == NULL)
			break;
	}
	return (got_com ? i : 0);
}

/*
 * plines(p) - return the number of physical screen lines taken by line 'p'
 */
	int
plines(p)
	linenr_t	p;
{
	return plines_win(curwin, p);
}
	
	int
plines_win(wp, p)
	WIN			*wp;
	linenr_t	p;
{
	register long		col;
	register char_u		*s;
	register int		lines;

	if (!wp->w_p_wrap)
		return 1;

	s = ml_get_buf(wp->w_buffer, p, FALSE);
	if (*s == NUL)				/* empty line */
		return 1;

	col = linetabsize(s);

	/*
	 * If list mode is on, then the '$' at the end of the line takes up one
	 * extra column.
	 */
	if (wp->w_p_list)
		col += 1;

	/*
	 * If 'number' mode is on, add another 8.
	 */
	if (wp->w_p_nu)
		col += 8;

	lines = (col + (Columns - 1)) / Columns;
	if (lines <= wp->w_height)
		return lines;
	return (int)(wp->w_height);		/* maximum length */
}

/*
 * Count the physical lines (rows) for the lines "first" to "last" inclusive.
 */
	int
plines_m(first, last)
	linenr_t		first, last;
{
	return plines_m_win(curwin, first, last);
}

	int
plines_m_win(wp, first, last)
	WIN				*wp;
	linenr_t		first, last;
{
	int count = 0;

	while (first <= last)
		count += plines_win(wp, first++);
	return (count);
}

/*
 * Insert or replace a single character at the cursor position.
 * When in REPLACE mode, replace any existing character.
 */
	void
ins_char(c)
	int			c;
{
	register char_u  *p;
	char_u			*newp;
	char_u			*oldp;
	int				oldlen;
	int				extra;
	colnr_t			col = curwin->w_cursor.col;
	linenr_t		lnum = curwin->w_cursor.lnum;

	oldp = ml_get(lnum);
	oldlen = STRLEN(oldp) + 1;

	if (State != REPLACE || *(oldp + col) == NUL)
		extra = 1;
	else
		extra = 0;

	/*
	 * a character has to be put on the replace stack if there is a
	 * character that is replaced, so it can be put back when BS is used.
	 * Otherwise a 0 is put on the stack, indicating that a new character
	 * was inserted, which can be deleted when BS is used.
	 */
	if (State == REPLACE)
		replace_push(!extra ? *(oldp + col) : 0);
	newp = alloc_check((unsigned)(oldlen + extra));
	if (newp == NULL)
		return;
	vim_memmove(newp, oldp, (size_t)col);
	p = newp + col;
	vim_memmove(p + extra, oldp + col, (size_t)(oldlen - col));
	*p = c;
	ml_replace(lnum, newp, FALSE);

	/*
	 * If we're in insert or replace mode and 'showmatch' is set, then check for
	 * right parens and braces. If there isn't a match, then beep. If there
	 * is a match AND it's on the screen, then flash to it briefly. If it
	 * isn't on the screen, don't do anything.
	 */
#ifdef RIGHTLEFT
	if (p_sm && (State & INSERT) && 
			((!curwin->w_p_rl && (c == ')' || c == '}' || c == ']')) ||
			 (curwin->w_p_rl && (c == '(' || c == '{' || c == '['))))
#else
 	if (p_sm && (State & INSERT) && (c == ')' || c == '}' || c == ']'))
#endif
		showmatch();

#ifdef RIGHTLEFT
	if (!p_ri || State == REPLACE)		/* normal insert: cursor right */
#endif
		++curwin->w_cursor.col;
	CHANGED;
}

/*
 * Insert a string at the cursor position.
 * Note: Nothing special for replace mode.
 */
	void
ins_str(s)
	char_u  *s;
{
	register char_u		*oldp, *newp;
	register int		newlen = STRLEN(s);
	int					oldlen;
	colnr_t				col = curwin->w_cursor.col;
	linenr_t			lnum = curwin->w_cursor.lnum;

	oldp = ml_get(lnum);
	oldlen = STRLEN(oldp);

	newp = alloc_check((unsigned)(oldlen + newlen + 1));
	if (newp == NULL)
		return;
	vim_memmove(newp, oldp, (size_t)col);
	vim_memmove(newp + col, s, (size_t)newlen);
	vim_memmove(newp + col + newlen, oldp + col, (size_t)(oldlen - col + 1));
	ml_replace(lnum, newp, FALSE);
	curwin->w_cursor.col += newlen;
	CHANGED;
}

/*
 * delete one character under the cursor
 *
 * return FAIL for failure, OK otherwise
 */
	int
delchar(fixpos)
	int			fixpos; 	/* if TRUE fix the cursor position when done */
{
	char_u		*oldp, *newp;
	colnr_t		oldlen;
	linenr_t	lnum = curwin->w_cursor.lnum;
	colnr_t		col = curwin->w_cursor.col;
	int			was_alloced;

	oldp = ml_get(lnum);
	oldlen = STRLEN(oldp);

	if (col >= oldlen)	/* can't do anything (happens with replace mode) */
		return FAIL;

/*
 * If the old line has been allocated the deletion can be done in the
 * existing line. Otherwise a new line has to be allocated
 */
	was_alloced = ml_line_alloced();		/* check if oldp was allocated */
	if (was_alloced)
		newp = oldp;							/* use same allocated memory */
	else
	{
		newp = alloc((unsigned)oldlen);		/* need to allocated a new line */
		if (newp == NULL)
			return FAIL;
		vim_memmove(newp, oldp, (size_t)col);
	}
	vim_memmove(newp + col, oldp + col + 1, (size_t)(oldlen - col));
	if (!was_alloced)
		ml_replace(lnum, newp, FALSE);

	/*
	 * If we just took off the last character of a non-blank line, we don't
	 * want to end up positioned at the NUL.
	 */
	if (fixpos && curwin->w_cursor.col > 0 && col == oldlen - 1)
		--curwin->w_cursor.col;

	CHANGED;
	return OK;
}

/*
 * Delete from cursor to end of line.
 *
 * return FAIL for failure, OK otherwise
 */
	int
truncate_line(fixpos)
	int			fixpos; 	/* if TRUE fix the cursor position when done */
{
	char_u		*newp;
	linenr_t	lnum = curwin->w_cursor.lnum;
	colnr_t		col = curwin->w_cursor.col;

	if (col == 0)
		newp = strsave((char_u *)"");
	else
		newp = strnsave(ml_get(lnum), col);

	if (newp == NULL)
		return FAIL;

	ml_replace(lnum, newp, FALSE);

	/*
	 * If "fixpos" is TRUE we don't want to end up positioned at the NUL.
	 */
	if (fixpos && curwin->w_cursor.col > 0)
		--curwin->w_cursor.col;

	CHANGED;
	return OK;
}

	void
dellines(nlines, dowindow, undo)
	long 			nlines;			/* number of lines to delete */
	int 			dowindow;		/* if true, update the window */
	int				undo;			/* if true, prepare for undo */
{
	int 			num_plines = 0;

	if (nlines <= 0)
		return;
	/*
	 * There's no point in keeping the window updated if redrawing is disabled
	 * or we're deleting more than a window's worth of lines.
	 */
	if (RedrawingDisabled)
		dowindow = FALSE;
	else if (nlines > (curwin->w_height - curwin->w_row) && dowindow)
	{
		dowindow = FALSE;
		/* flaky way to clear rest of window */
		win_del_lines(curwin, curwin->w_row, curwin->w_height, TRUE, TRUE);
	}
	/* save the deleted lines for undo */
	if (undo && u_savedel(curwin->w_cursor.lnum, nlines) == FAIL)
		return;

	/* adjust marks for deleted lines and lines that follow */
	mark_adjust(curwin->w_cursor.lnum, curwin->w_cursor.lnum + nlines - 1,
															MAXLNUM, -nlines);

	while (nlines-- > 0)
	{
		if (curbuf->b_ml.ml_flags & ML_EMPTY) 		/* nothing to delete */
			break;

		/*
		 * Set up to delete the correct number of physical lines on the
		 * window
		 */
		if (dowindow)
			num_plines += plines(curwin->w_cursor.lnum);

		ml_delete(curwin->w_cursor.lnum, TRUE);

		CHANGED;

		/* If we delete the last line in the file, stop */
		if (curwin->w_cursor.lnum > curbuf->b_ml.ml_line_count)
		{
			curwin->w_cursor.lnum = curbuf->b_ml.ml_line_count;
			break;
		}
	}
	curwin->w_cursor.col = 0;
	/*
	 * Delete the correct number of physical lines on the window
	 */
	if (dowindow && num_plines > 0)
		win_del_lines(curwin, curwin->w_row, num_plines, TRUE, TRUE);
}

	int
gchar(pos)
	FPOS *pos;
{
	return (int)(*(ml_get_pos(pos)));
}

	int
gchar_cursor()
{
	return (int)(*(ml_get_cursor()));
}

/*
 * Write a character at the current cursor position.
 * It is directly written into the block.
 */
	void
pchar_cursor(c)
	int c;
{
	*(ml_get_buf(curbuf, curwin->w_cursor.lnum, TRUE) +
													curwin->w_cursor.col) = c;
}

/*
 * Put *pos at end of current buffer
 */
	void
goto_endofbuf(pos)
	FPOS	*pos;
{
	char_u	*p;

	pos->lnum = curbuf->b_ml.ml_line_count;
	pos->col = 0;
	p = ml_get(pos->lnum);
	while (*p++)
		++pos->col;
}

/*
 * When extra == 0: Return TRUE if the cursor is before or on the first
 *					non-blank in the line.
 * When extra == 1: Return TRUE if the cursor is before the first non-blank in
 *					the line.
 */
	int
inindent(extra)
	int		extra;
{
	register char_u *ptr;
	register colnr_t col;

	for (col = 0, ptr = ml_get_curline(); vim_iswhite(*ptr); ++col)
		++ptr;
	if (col >= curwin->w_cursor.col + extra)
		return TRUE;
	else
		return FALSE;
}

/*
 * skipwhite: skip over ' ' and '\t'.
 */
	char_u *
skipwhite(p)
	register char_u *p;
{
    while (vim_iswhite(*p))	/* skip to next non-white */
    	++p;
	return p;
}

/*
 * skipdigits: skip over digits;
 */
	char_u *
skipdigits(p)
	register char_u *p;
{
    while (isdigit(*p))	/* skip to next non-digit */
    	++p;
	return p;
}

/*
 * skiptowhite: skip over text until ' ' or '\t' or NUL.
 */
	char_u *
skiptowhite(p)
	register char_u *p;
{
	while (*p != ' ' && *p != '\t' && *p != NUL)
		++p;
	return p;
}

/*
 * skiptowhite_esc: Like skiptowhite(), but also skip escaped chars
 */
	char_u *
skiptowhite_esc(p)
	register char_u *p;
{
	while (*p != ' ' && *p != '\t' && *p != NUL)
	{
		if ((*p == '\\' || *p == Ctrl('V')) && *(p + 1) != NUL)
			++p;
		++p;
	}
	return p;
}

/*
 * getdigits: get a number from a string and skip over it
 *
 * note: you must give a pointer to a char_u pointer!
 */

	long
getdigits(pp)
	char_u **pp;
{
    register char_u *p;
	long retval;
    
	p = *pp;
	retval = atol((char *)p);
	p = skipdigits(p);		/* skip to next non-digit */
    *pp = p;
	return retval;
}

/*
 * Skip to next part of an option argument: Skip space and comma.
 */
	char_u *
skip_to_option_part(p)
	char_u	*p;
{
	if (*p == ',')
		++p;
	while (*p == ' ')
		++p;
	return p;
}

	char *
plural(n)
	long n;
{
	static char buf[2] = "s";

	if (n == 1)
		return &(buf[1]);
	return &(buf[0]);
}

/*
 * set_Changed is called when something in the current buffer is changed
 */
	void
set_Changed()
{
	if (!curbuf->b_changed)
	{
		change_warning(0);
		curbuf->b_changed = TRUE;
		check_status(curbuf);
	}
	modified = TRUE;				/* used for redrawing */
}

/*
 * unset_Changed is called when the changed flag must be reset for buffer 'buf'
 */
	void
unset_Changed(buf)
	BUF		*buf;
{
	if (buf->b_changed)
	{
		buf->b_changed = 0;
		check_status(buf);
	}
}

/*
 * check_status: called when the status bars for the buffer 'buf'
 *				 need to be updated
 */
	static void
check_status(buf)
	BUF		*buf;
{
	WIN		*wp;
	int		i;

	i = 0;
	for (wp = firstwin; wp != NULL; wp = wp->w_next)
		if (wp->w_buffer == buf && wp->w_status_height)
		{
			wp->w_redr_status = TRUE;
			++i;
		}
	if (i)
		redraw_later(NOT_VALID);
}

/*
 * If the file is readonly, give a warning message with the first change.
 * Don't do this for autocommands.
 * Don't use emsg(), because it flushes the macro buffer.
 * If we have undone all changes b_changed will be FALSE, but b_did_warn
 * will be TRUE.
 */
	void
change_warning(col)
	int		col;				/* column for message; non-zero when in insert
								   mode and 'showmode' is on */
{
	if (curbuf->b_did_warn == FALSE && curbuf->b_changed == 0 &&
#ifdef AUTOCMD
											  !autocmd_busy &&
#endif
											  curbuf->b_p_ro)
	{
		/*
		 * Do what msg() does, but with a column offset.
		 */
		msg_start();
		msg_col = col;
		MSG_OUTSTR("Warning: Changing a readonly file");
		msg_clr_eos();
		(void)msg_end();
		flushbuf();
		mch_delay(1000L, TRUE);	/* give him some time to think about it */
		curbuf->b_did_warn = TRUE;
	}
}

/*
 * Ask for a reply from the user, a 'y' or a 'n'.
 * No other characters are accepted, the message is repeated until a valid
 * reply is entered or CTRL-C is hit.
 * If direct is TRUE, don't use vgetc but mch_inchar, don't get characters from
 * any buffers but directly from the user.
 *
 * return the 'y' or 'n'
 */
	int
ask_yesno(str, direct)
	char_u	*str;
	int		direct;
{
	int		r = ' ';
	char_u	buf[20];
	int		len = 0;
	int		idx = 0;

	if (exiting)				/* put terminal in raw mode for this question */
		settmode(1);
	while (r != 'y' && r != 'n')
	{
		(void)set_highlight('r');	/* same highlighting as for wait_return */
		msg_highlight = TRUE;
		smsg((char_u *)"%s (y/n)?", str);
		if (direct)
		{
			flushbuf();
			if (idx >= len)
			{
				len = mch_inchar(buf, 20, -1L);
				idx = 0;
			}
			r = buf[idx++];
		}
		else
			r = vgetc();
		if (r == Ctrl('C') || r == ESC)
			r = 'n';
		msg_outchar(r);		/* show what you typed */
		flushbuf();
	}
	return r;
}

/*
 * get a number from the user
 */
	int
get_number()
{
	int		n = 0;
	int		c;

	for (;;)
	{
		windgoto(msg_row, msg_col);
		c = vgetc();
		if (isdigit(c))
		{
			n = n * 10 + c - '0';
			msg_outchar(c);
		}
		else if (c == K_DEL || c == K_BS || c == Ctrl('H'))
		{
			n /= 10;
			MSG_OUTSTR("\b \b");
		}
		else if (c == CR || c == NL || c == Ctrl('C'))
			break;
	}
	return n;
}

	void
msgmore(n)
	long n;
{
	long pn;

	if (global_busy ||		/* no messages now, wait until global is finished */
			keep_msg)		/* there is a message already, skip this one */
		return;

	if (n > 0)
		pn = n;
	else
		pn = -n;

	if (pn > p_report)
	{
		sprintf((char *)msg_buf, "%ld %s line%s %s",
				pn, n > 0 ? "more" : "fewer", plural(pn),
				got_int ? "(Interrupted)" : "");
		if (msg(msg_buf))
			keep_msg = msg_buf;
	}
}

/*
 * flush map and typeahead buffers and give a warning for an error
 */
	void
beep_flush()
{
	flush_buffers(FALSE);
	vim_beep();
}

/*
 * give a warning for an error
 */
	void
vim_beep()
{
	if (p_vb)
	{
#ifdef DJGPP
		ScreenVisualBell();
#else
		outstr(T_VB);
#endif
	}
	else
	{
#if defined MSDOS  ||  defined WIN32 /* ? gvr */
		/*
		 * The number of beeps outputted is reduced to avoid having to wait
		 * for all the beeps to finish. This is only a problem on systems
		 * where the beeps don't overlap.
		 */
		if (beep_count == 0 || beep_count == 10)
		{
			outchar('\007');
			beep_count = 1;
		}
		else
			++beep_count;
#else
		outchar('\007');
#endif
	}
}

/*
 * To get the "real" home directory:
 * - get value of $HOME
 * For Unix:
 *	- go to that directory
 *	- do mch_dirname() to get the real name of that directory.
 *	This also works with mounts and links.
 *	Don't do this for MS-DOS, it will change the "current dir" for a drive.
 */
static char_u	*homedir = NULL;

	void
init_homedir()
{
	char_u	*var;

	var = vim_getenv((char_u *)"HOME");
#if defined(OS2) || defined(MSDOS) || defined(WIN32)
	/*
	 * Default home dir is C:/
	 * Best assumption we can make in such a situation.
	 */
	if (var == NULL)
		var = "C:/";
#endif
	if (var != NULL)
	{
#ifdef UNIX
		if (mch_dirname(NameBuff, MAXPATHL) == OK)
		{
			if (!vim_chdir((char *)var) && mch_dirname(IObuff, IOSIZE) == OK)
				var = IObuff;
			vim_chdir((char *)NameBuff);
		}
#endif
		homedir = strsave(var);
	}
}

/* 
 * Expand environment variable with path name.
 * For Unix and OS/2 "~/" is also expanded, like $HOME.
 * If anything fails no expansion is done and dst equals src.
 * Note that IObuff must NOT be used as either src or dst!  This is because
 * vim_getenv() may use IObuff to do its expansion.
 */
	void
expand_env(src, dst, dstlen)
	char_u	*src;			/* input string e.g. "$HOME/vim.hlp" */
	char_u	*dst;			/* where to put the result */
	int		dstlen;			/* maximum length of the result */
{
	char_u	*tail;
	int		c;
	char_u	*var;
	int		copy_char;
#if defined(UNIX) || defined(OS2)
	int		mustfree;
	int		at_start = TRUE;
#endif

	src = skipwhite(src);
	--dstlen;				/* leave one char space for "\," */
	while (*src && dstlen > 0)
	{
		copy_char = TRUE;
		if (*src == '$'
#if defined(UNIX) || defined(OS2)
						|| (*src == '~' && at_start)
#endif
													)
		{
#if defined(UNIX) || defined(OS2)
			mustfree = FALSE;

			/*
			 * The variable name is copied into dst temporarily, because it may
			 * be a string in read-only memory and a NUL needs to be inserted.
			 */
			if (*src == '$')							/* environment var */
			{
#endif
				tail = src + 1;
				var = dst;
				c = dstlen - 1;
				while (c-- > 0 && *tail && isidchar(*tail))
#ifdef OS2
				{	/* env vars only in uppercase */
					*var++ = toupper(*tail);	/* toupper() may be a macro! */
					tail++;
				}
#else
					*var++ = *tail++;
#endif
				*var = NUL;
#if defined(OS2) || defined(MSDOS) || defined(WIN32)
				/* use "C:/" when $HOME is not set */
				if (STRCMP(dst, "HOME") == 0)
					var = homedir;
				else
#endif
					var = vim_getenv(dst);
#if defined(UNIX) || defined(OS2)
			}
														/* home directory */
			else if (src[1] == NUL ||
							  vim_strchr((char_u *)"/ ,\t\n", src[1]) != NULL)
			{
				var = homedir;
				tail = src + 1;
			}
			else										/* user directory */
# ifdef OS2
			{
				/* cannot expand user's home directory, so don't try */
				var = NULL;
				tail = "";	/* shut gcc up about "may be used uninitialized" */
			}
# else
			{
				/*
				 * Copy ~user to dst[], so we can put a NUL after it.
				 */
				tail = src;
				var = dst;
				c = dstlen - 1;
				while (c-- > 0 && *tail &&
									   isfilechar(*tail) && !ispathsep(*tail))
					*var++ = *tail++;
				*var = NUL;

				/*
				 * If the system supports getpwnam(), use it.
				 * Otherwise, or if getpwnam() fails, the shell is used to
				 * expand ~user.  This is slower and may fail if the shell
				 * does not support ~user (old versions of /bin/sh).
				 */
#  if defined(HAVE_GETPWNAM) && defined(HAVE_PWD_H)
				{
					struct passwd *pw;

					pw = getpwnam((char *)dst + 1);
					if (pw != NULL)
						var = (char_u *)pw->pw_dir;
					else
						var = NULL;
				}
				if (var == NULL)
#  endif
				{
					var = ExpandOne(dst, NULL, 0, WILD_EXPAND_FREE);
					mustfree = TRUE;
				}
			}
# endif /* OS2 */
#endif /* UNIX || OS2 */
			if (var != NULL && *var != NUL &&
						  (STRLEN(var) + STRLEN(tail) + 1 < (unsigned)dstlen))
			{
				STRCPY(dst, var);
				dstlen -= STRLEN(var);
				dst += STRLEN(var);
					/* if var[] ends in a path separator and tail[] starts
					 * with it, skip a character */
				if (*var && ispathsep(*(dst-1)) && ispathsep(*tail))
					++tail;
				src = tail;
				copy_char = FALSE;
			}
#if defined(UNIX) || defined(OS2)
			if (mustfree)
				vim_free(var);
#endif
		}

		if (copy_char)		/* copy at least one char */
		{
#if defined(UNIX) || defined(OS2)
			/*
			 * Recogize the start of a new name, for '~'.
			 */
			at_start = FALSE;
#endif
			if (src[0] == '\\')
			{
				*dst++ = *src++;
				--dstlen;
			}
#if defined(UNIX) || defined(OS2)
			else if (src[0] == ' ' || src[0] == ',')
				at_start = TRUE;
#endif
			*dst++ = *src++;
			--dstlen;
		}
	}
	*dst = NUL;
}

/* 
 * Replace home directory by "~" in each space or comma separated filename in
 * 'src'.  If anything fails (except when out of space) dst equals src.
 */
	void
home_replace(buf, src, dst, dstlen)
	BUF		*buf;			/* when not NULL, check for help files */
	char_u	*src;			/* input file name */
	char_u	*dst;			/* where to put the result */
	int		dstlen;			/* maximum length of the result */
{
	size_t	dirlen = 0, envlen = 0;
	size_t	len;
	char_u	*homedir_env;
	char_u	*p;

	if (src == NULL)
	{
		*dst = NUL;
		return;
	}

	/*
	 * If the file is a help file, remove the path completely.
	 */
	if (buf != NULL && buf->b_help)
	{
		STRCPY(dst, gettail(src));
		return;
	}

	/*
	 * We check both the value of the $HOME environment variable and the
	 * "real" home directory.
	 */
	if (homedir != NULL)
		dirlen = STRLEN(homedir);
	homedir_env = vim_getenv((char_u *)"HOME");
	if (homedir_env != NULL)
		envlen = STRLEN(homedir_env);

	src = skipwhite(src);
	while (*src && dstlen > 0)
	{
		/*
		 * Here we are at the beginning of a filename.
		 * First, check to see if the beginning of the filename matches
		 * $HOME or the "real" home directory. Check that there is a '/'
		 * after the match (so that if e.g. the file is "/home/pieter/bla",
		 * and the home directory is "/home/piet", the file does not end up
		 * as "~er/bla" (which would seem to indicate the file "bla" in user
		 * er's home directory)).
		 */
		p = homedir;
		len = dirlen;
		for (;;)
		{
			if (len && fnamencmp(src, p, len) == 0 && (ispathsep(src[len]) ||
					   src[len] == ',' || src[len] == ' ' || src[len] == NUL))
			{
				src += len;
				if (--dstlen > 0)
					*dst++ = '~';

				/*
				 * If it's just the home directory, add  "/".
				 */
				if (!ispathsep(src[0]) && --dstlen > 0)
					*dst++ = '/';
			}
			if (p == homedir_env)
				break;
			p = homedir_env;
			len = envlen;
		}

		/* skip to separator: space or comma */
		while (*src && *src != ',' && *src != ' ' && --dstlen > 0)
			*dst++ = *src++;
		/* skip separator */
		while ((*src == ' ' || *src == ',') && --dstlen > 0)
			*dst++ = *src++;
	}
	/* if (dstlen == 0) out of space, what to do??? */

	*dst = NUL;
}

/*
 * Like home_replace, store the replaced string in allocated memory.
 * When something fails, NULL is returned.
 */
	char_u	*
home_replace_save(buf, src)
	BUF		*buf;			/* when not NULL, check for help files */
	char_u	*src;			/* input file name */
{
	char_u		*dst;
	unsigned	len;

	len = 3;					/* space for "~/" and trailing NUL */
	if (src != NULL)			/* just in case */
		len += STRLEN(src);
	dst = alloc(len);
	if (dst != NULL)
		home_replace(buf, src, dst, len);
	return dst;
}

/*
 * Compare two file names and return:
 * FPC_SAME   if they both exist and are the same file.
 * FPC_DIFF   if they both exist and are different files.
 * FPC_NOTX   if they both don't exist.
 * FPC_DIFFX  if one of them doesn't exist.
 * For the first name environment variables are expanded
 */
	int
fullpathcmp(s1, s2)
	char_u *s1, *s2;
{
#ifdef UNIX
	char_u			buf1[MAXPATHL];
	struct stat		st1, st2;
	int				r1, r2;

	expand_env(s1, buf1, MAXPATHL);
	r1 = stat((char *)buf1, &st1);
	r2 = stat((char *)s2, &st2);
	if (r1 != 0 && r2 != 0)
		return FPC_NOTX;
	if (r1 != 0 || r2 != 0)
		return FPC_DIFFX;
	if (st1.st_dev == st2.st_dev && st1.st_ino == st2.st_ino)
		return FPC_SAME;
	return FPC_DIFF;
#else
	char_u	*buf1 = NULL;
	char_u	*buf2 = NULL;
	int		retval = FPC_DIFF;
	int		r1, r2;
	
	if ((buf1 = alloc(MAXPATHL)) != NULL && (buf2 = alloc(MAXPATHL)) != NULL)
	{
		expand_env(s1, buf2, MAXPATHL);
		/*
		 * If FullName() failed, the file probably doesn't exist.
		 */
		r1 = FullName(buf2, buf1, MAXPATHL, FALSE);
		r2 = FullName(s2, buf2, MAXPATHL, FALSE);
		if (r1 != OK && r2 != OK)
			retval = FPC_NOTX;
		else if (r1 != OK || r2 != OK)
			retval = FPC_DIFFX;
		else if (fnamecmp(buf1, buf2))
			retval = FPC_DIFF;
		else
			retval = FPC_SAME;
	}
	vim_free(buf1);
	vim_free(buf2);
	return retval;
#endif
}

/*
 * get the tail of a path: the file name.
 */
	char_u *
gettail(fname)
	char_u *fname;
{
	register char_u *p1, *p2;

	if (fname == NULL)
		return (char_u *)"";
	for (p1 = p2 = fname; *p2; ++p2)	/* find last part of path */
	{
		if (ispathsep(*p2))
			p1 = p2 + 1;
	}
	return p1;
}

/*
 * Get a pointer to one character past the head of a path name.
 * Unix: after "/"; DOS: after "c:\"; Amiga: after "disk:/".
 * If there is no head, path is returned.
 */
	char_u *
get_past_head(path)
	char_u	*path;
{
	char_u	*retval;

#if defined(MSDOS) || defined(WIN32) || defined(OS2)
	/* may skip "c:" */
	if (isalpha(path[0]) && path[1] == ':')
		retval = path + 2;
	else
		retval = path;
#else
# if defined(AMIGA)
	/* may skip "label:" */
	retval = vim_strchr(path, ':');
	if (retval == NULL)
		retval = path;
# else	/* Unix */
	retval = path;
# endif
#endif

	while (ispathsep(*retval))
		++retval;

	return retval;
}

/*
 * return TRUE if 'c' is a path separator.
 */
	int
ispathsep(c)
	int c;
{
#ifdef UNIX
	return (c == PATHSEP);		/* UNIX has ':' inside file names */
#else
# ifdef BACKSLASH_IN_FILENAME
	return (c == ':' || c == PATHSEP || c == '\\');
# else
	return (c == ':' || c == PATHSEP);
# endif
#endif
}

/*
 * Concatenate filenames fname1 and fname2 into allocated memory.
 * Only add a '/' when 'sep' is TRUE and it is neccesary.
 */
	char_u	*
concat_fnames(fname1, fname2, sep)
	char_u	*fname1;
	char_u	*fname2;
	int		sep;
{
	char_u	*dest;

	dest = alloc((unsigned)(STRLEN(fname1) + STRLEN(fname2) + 2));
	if (dest != NULL)
	{
		STRCPY(dest, fname1);
		if (sep && *dest && !ispathsep(*(dest + STRLEN(dest) - 1)))
			STRCAT(dest, PATHSEPSTR);
		STRCAT(dest, fname2);
	}
	return dest;
}

/*
 * FullName_save - Make an allocated copy of a full file name.
 * Returns NULL when failed.
 */
	char_u 	*
FullName_save(fname)
	char_u		*fname;
{
	char_u		*buf;
	char_u		*new_fname = NULL;

	buf = alloc((unsigned)MAXPATHL);
	if (buf != NULL)
	{
		if (FullName(fname, buf, MAXPATHL, FALSE) != FAIL)
			new_fname = strsave(buf);
		vim_free(buf);
	}
	return new_fname;
}

#ifdef CINDENT

/*
 * Functions for C-indenting.
 * Most of this originally comes from Eric Fischer.
 */
/*
 * Below "XXX" means that this function may unlock the current line.
 */

static int		isdefault __ARGS((char_u *));
static char_u	*after_label __ARGS((char_u *l));
static int		get_indent_nolabel __ARGS((linenr_t lnum));
static int		skip_label __ARGS((linenr_t, char_u **pp, int ind_maxcomment));
static int		ispreproc __ARGS((char_u *));
static int		iscomment __ARGS((char_u *));
static int		commentorempty __ARGS((char_u *));
static int		isterminated __ARGS((char_u *));
static int		isfuncdecl __ARGS((char_u *));
static char_u	*skip_string __ARGS((char_u *p));
static int		isif __ARGS((char_u *));
static int		iselse __ARGS((char_u *));
static int		isdo __ARGS((char_u *));
static int		iswhileofdo __ARGS((char_u *, linenr_t, int));
static FPOS		*find_start_comment __ARGS((int ind_maxcomment));
static FPOS		*find_start_brace __ARGS((int));
static FPOS		*find_match_paren __ARGS((int, int));
static int		find_last_paren __ARGS((char_u *l));
static int		find_match __ARGS((int lookfor, linenr_t ourscope,
						int ind_maxparen, int ind_maxcomment));

/*
 * Recognize a label: "label:".
 * Note: curwin->w_cursor must be where we are looking for the label.
 */
	int
islabel(ind_maxcomment)			/* XXX */
	int			ind_maxcomment;
{
	char_u		*s;

	s = skipwhite(ml_get_curline());

	/*
	 * Exclude "default" from labels, since it should be indented
	 * like a switch label.
	 */

	if (isdefault(s))
		return FALSE;

	if (!isidchar(*s))		/* need at least one ID character */
		return FALSE;

	while (isidchar(*s))
		s++;

	s = skipwhite(s);

	/* "::" is not a label, it's C++ */
	if (*s == ':' && s[1] != ':')
	{
		/*
		 * Only accept a label if the previous line is terminated or is a case
		 * label.
		 */
		FPOS	cursor_save;
		FPOS	*trypos;
		char_u	*line;

		cursor_save = curwin->w_cursor;
		while (curwin->w_cursor.lnum > 1)
		{
			--curwin->w_cursor.lnum;

			/*
			 * If we're in a comment now, skip to the start of the comment.
			 */
			curwin->w_cursor.col = 0;
			if ((trypos = find_start_comment(ind_maxcomment)) != NULL) /* XXX */
				curwin->w_cursor = *trypos;

			line = ml_get_curline();
			if (ispreproc(line))		/* ignore #defines, #if, etc. */
				continue;
			if (commentorempty(line))
				continue;

			curwin->w_cursor = cursor_save;
			if (isterminated(line) || iscase(line))
				return TRUE;
			return FALSE;
		}
		curwin->w_cursor = cursor_save;
		return TRUE;			/* label at start of file??? */
	}
	return FALSE;
}

/*
 * Recognize a switch label: "case .*:" or "default:".
 */
	 int
iscase(s)
	char_u *s;
{
	s = skipwhite(s);
	if (STRNCMP(s, "case", 4) == 0 && !isidchar(s[4]))
	{
		for (s += 4; *s; ++s)
			if (*s == ':')
			{
				if (s[1] == ':')		/* skip over "::" for C++ */
					++s;
				else
					return TRUE;
			}
		return FALSE;
	}

	if (isdefault(s))
		return TRUE;
	return FALSE;
}

/*
 * Recognize a "default" switch label.
 */
	static int
isdefault(s)
	char_u	*s;
{
	return (STRNCMP(s, "default", 7) == 0 &&
			*(s = skipwhite(s + 7)) == ':' &&
			s[1] != ':');
}

/*
 * Return a pointer to the first non-empty non-comment character after a ':'.
 * Return NULL if not found.
 *        case 234:    a = b;
 *                     ^
 */
	static char_u *
after_label(l)
	char_u	*l;
{
	for ( ; *l; ++l)
		if (*l == ':')
		{
			if (l[1] == ':')		/* skip over "::" for C++ */
				++l;
			else
				break;
		}
	if (*l == NUL)
		return NULL;
	l = skipwhite(l + 1);
	if (commentorempty(l))
		return NULL;
	return l;
}

/*
 * Get indent of line "lnum", skipping a label.
 * Return 0 if there is nothing after the label.
 */
	static int
get_indent_nolabel(lnum)				/* XXX */
	linenr_t	lnum;
{
	char_u		*l;
	FPOS		fp;
	colnr_t		col;
	char_u		*p;

	l = ml_get(lnum);
	p = after_label(l);
	if (p == NULL)
		return 0;

	fp.col = p - l;
	fp.lnum = lnum;
	getvcol(curwin, &fp, &col, NULL, NULL);
	return (int)col;
}

/*
 * Find indent for line "lnum", ignoring any case or jump label.
 * Also return a pointer to the text (after the label).
 *   label:		if (asdf && asdfasdf)
 *              ^
 */
	static int
skip_label(lnum, pp, ind_maxcomment)
	linenr_t	lnum;
	char_u		**pp;
	int			ind_maxcomment;
{
	char_u		*l;
	int			amount;
	FPOS		cursor_save;

	cursor_save = curwin->w_cursor;
	curwin->w_cursor.lnum = lnum;
	l = ml_get_curline();
	if (iscase(l) || islabel(ind_maxcomment)) /* XXX */
	{
		amount = get_indent_nolabel(lnum);
		l = after_label(ml_get_curline());
		if (l == NULL)			/* just in case */
			l = ml_get_curline();
	}
	else
	{
		amount = get_indent();
		l = ml_get_curline();
	}
	*pp = l;

	curwin->w_cursor = cursor_save;
	return amount;
}

/*
 * Recognize a preprocessor statement: Any line that starts with '#'.
 */
	static int
ispreproc(s)
	char_u *s;
{
	s = skipwhite(s);
	if (*s == '#')
		return TRUE;
	return 0;
}

/*
 * Recognize the start of a C or C++ comment.
 */
	static int
iscomment(p)
	char_u	*p;
{
	return (p[0] == '/' && (p[1] == '*' || p[1] == '/'));
}

/*
 * Recognize an empty or comment line.
 */
	static int
commentorempty(s)
	char_u *s;
{
	s = skipwhite(s);
	if (*s == NUL || iscomment(s))
		return TRUE;
	return FALSE;
}

/*
 * Recognize a line that starts with '{' or '}', or ends with ';' or '}'.
 * Don't consider "} else" a terminated line.
 * Also consider a line terminated if it ends in ','.  This is not 100%
 * correct, but this mostly means we are in initializations and then it's OK.
 */
	static int
isterminated(s)
	char_u *s;
{
	s = skipwhite(s);

	if (*s == '{' || (*s == '}' && !iselse(s)))
		return TRUE;

	while (*s)
	{
		if (iscomment(s))		/* at start of comment ignore rest of line */
			return FALSE;
		s = skip_string(s);
		if ((*s == ';' || *s == '{' || *s == ',') && commentorempty(s + 1))
			return TRUE;
		s++;
	}
	return FALSE;
}

/*
 * Recognize the basic picture of a function declaration -- it needs to
 * have an open paren somewhere and a close paren at the end of the line and
 * no semicolons anywhere.
 */
	static int
isfuncdecl(s)
	char_u *s;
{
	while (*s && *s != '(' && *s != ';')
		if (iscomment(s++))
			return FALSE;			/* comment before () ??? */
	if (*s != '(')
		return FALSE;				/* ';' before any () or no '(' */

	while (*s && *s != ';')
	{
		if (*s == ')' && commentorempty(s + 1))
			return TRUE;
		if (iscomment(s++))
			return FALSE;			/* comment between ( and ) ??? */
	}
	return FALSE;
}

/*
 * Skip over a "string" and a 'c' character.
 */
	static char_u *
skip_string(p)
	char_u	*p;
{
	int		i;

	/*
	 * We loop, because strings may be concatenated: "date""time".
	 */
	for ( ; ; ++p)
	{
		if (p[0] == '\'')					/* 'c' or '\n' or '\000' */
		{
			if (!p[1])						/* ' at end of line */
				break;
			i = 2;
			if (p[1] == '\\')				/* '\n' or '\000' */
			{
				++i;
				while (isdigit(p[i - 1]))	/* '\000' */
					++i;
			}
			if (p[i] == '\'')				/* check for trailing ' */
			{
				p += i;
				continue;
			}
		}
		else if (p[0] == '"')				/* start of string */
		{
			for (++p; p[0]; ++p)
			{
				if (p[0] == '\\' && p[1])
					++p;
				else if (p[0] == '"')		/* end of string */
					break;
			}
			continue;
		}
		break;								/* no string found */
	}
	if (!*p)
		--p;								/* backup from NUL */
	return p;
}

	static int
isif(p)
	char_u	*p;
{
	return (STRNCMP(p, "if", 2) == 0 && !isidchar(p[2]));
}

	static int
iselse(p)
	char_u	*p;
{
	if (*p == '}')			/* accept "} else" */
		p = skipwhite(p + 1);
	return (STRNCMP(p, "else", 4) == 0 && !isidchar(p[4]));
}

	static int
isdo(p)
	char_u	*p;
{
	return (STRNCMP(p, "do", 2) == 0 && !isidchar(p[2]));
}

/*
 * Check if this is a "while" that should have a matching "do".
 * We only accept a "while (condition) ;", with only white space between the
 * ')' and ';'. The condition may be spread over several lines.
 */
	static int
iswhileofdo(p, lnum, ind_maxparen)			/* XXX */
	char_u		*p;
	linenr_t	lnum;
	int			ind_maxparen;
{
	FPOS		cursor_save;
	FPOS		*trypos;
	int			retval = FALSE;

	p = skipwhite(p);
	if (*p == '}')				/* accept "} while (cond);" */
		p = skipwhite(p + 1);
	if (STRNCMP(p, "while", 5) == 0 && !isidchar(p[5]))
	{
		cursor_save = curwin->w_cursor;
		curwin->w_cursor.lnum = lnum;
		curwin->w_cursor.col = 0;
		p = ml_get_curline();
		while (*p && *p != 'w')	/* skip any '}', until the 'w' of the "while" */
		{
			++p;
			++curwin->w_cursor.col;
		}
		if ((trypos = findmatchlimit(0, 0, ind_maxparen)) != NULL)
		{
			p = ml_get_pos(trypos) + 1;
			p = skipwhite(p);
			if (*p == ';')
				retval = TRUE;
		}
		curwin->w_cursor = cursor_save;
	}
	return retval;
}

/*
 * Find the start of a comment, not knowing if we are in a comment right now.
 * Search starts at w_cursor.lnum and goes backwards.
 */
	static FPOS *
find_start_comment(ind_maxcomment)			/* XXX */
	int			ind_maxcomment;
{
	FPOS		*pos;
	char_u		*line;
	char_u		*p;

	if ((pos = findmatchlimit('*', FM_BACKWARD, ind_maxcomment)) == NULL)
		return NULL;

	/*
	 * Check if the comment start we found is inside a string.
	 */
	line = ml_get(pos->lnum);
	for (p = line; *p && (unsigned)(p - line) < pos->col; ++p)
		p = skip_string(p);
	if ((unsigned)(p - line) > pos->col)
		return NULL;
	return pos;
}

/*
 * Find the '{' at the start of the block we are in.
 * Return NULL of no match found.
 * Ignore a '{' that is in a comment, makes indenting the next three lines
 * work. */
/* foo()	*/
/* {		*/
/* }		*/

	static FPOS *
find_start_brace(ind_maxcomment)			/* XXX */
	int			ind_maxcomment;
{
	FPOS		cursor_save;
	FPOS		*trypos;
	FPOS		*pos;
	static FPOS	pos_copy;

	cursor_save = curwin->w_cursor;
	while ((trypos = findmatchlimit('{', FM_BLOCKSTOP, 0)) != NULL)
	{
		pos_copy = *trypos;		/* copy FPOS, next findmatch will change it */
		trypos = &pos_copy;
		curwin->w_cursor = *trypos;
		pos = NULL;
		if (!iscomment(skipwhite(ml_get(trypos->lnum))) &&
				 (pos = find_start_comment(ind_maxcomment)) == NULL) /* XXX */
			break;
		if (pos != NULL)
			curwin->w_cursor.lnum = pos->lnum;
	}
	curwin->w_cursor = cursor_save;
	return trypos;
}

/*
 * Find the matching '(', failing if it is in a comment.
 * Return NULL of no match found.
 */
	static FPOS *
find_match_paren(ind_maxparen, ind_maxcomment)		/* XXX */
	int			ind_maxparen;
	int			ind_maxcomment;
{
	FPOS		cursor_save;
	FPOS		*trypos;
	static FPOS	pos_copy;

	cursor_save = curwin->w_cursor;
	if ((trypos = findmatchlimit('(', 0, ind_maxparen)) != NULL)
	{
		if (iscomment(skipwhite(ml_get(trypos->lnum))))
			trypos = NULL;
		else
		{
			pos_copy = *trypos;		/* copy trypos, findmatch will change it */
			trypos = &pos_copy;
			curwin->w_cursor = *trypos;
			if (find_start_comment(ind_maxcomment) != NULL)	/* XXX */
				trypos = NULL;
		}
	}
	curwin->w_cursor = cursor_save;
	return trypos;
}

/*
 * Set w_cursor.col to the column number of the last ')' in line "l".
 */
	static int
find_last_paren(l)
	char_u *l;
{
	int		i;
	int		retval = FALSE;

	curwin->w_cursor.col = 0;				/* default is start of line */

	for (i = 0; l[i]; i++)
	{
		i = skip_string(l + i) - l;			/* ignore parens in quotes */
		if (l[i] == ')')
		{
			curwin->w_cursor.col = i;
			retval = TRUE;
		}
	}
	return retval;
}

	int
get_c_indent()
{
	/*
	 * spaces from a block's opening brace the prevailing indent for that
	 * block should be
	 */
	int ind_level = curbuf->b_p_sw;

	/*
	 * spaces from the edge of the line an open brace that's at the end of a
	 * line is imagined to be.
	 */
	int ind_open_imag = 0;

	/*
	 * spaces from the prevailing indent for a line that is not precededof by
	 * an opening brace.
	 */
	int ind_no_brace = 0;

	/*
	 * column where the first { of a function should be located
	 */
	int ind_first_open = 0;

	/*
	 * spaces from the prevailing indent a leftmost open brace should be
	 * located
	 */
	int ind_open_extra = 0;

	/*
	 * spaces from the matching open brace (real location for one at the left
	 * edge; imaginary location from one that ends a line) the matching close
	 * brace should be located
	 */
	int ind_close_extra = 0;

	/*
	 * spaces from the edge of the line an open brace sitting in the leftmost
	 * column is imagined to be
	 */
	int ind_open_left_imag = 0;

	/*
	 * spaces from the switch() indent a "case xx" label should be located
	 */
	int ind_case = curbuf->b_p_sw;

	/*
	 * spaces from the "case xx:" code after a switch() should be located
	 */
	int ind_case_code = curbuf->b_p_sw;

	/*
	 * amount K&R-style parameters should be indented
	 */
	int ind_param = curbuf->b_p_sw;

	/*
	 * amount a function type spec should be indented
	 */
	int ind_func_type = curbuf->b_p_sw;

	/*
	 * additional spaces beyond the prevailing indent a continuation line
	 * should be located
	 */
	int ind_continuation = curbuf->b_p_sw;

	/*
	 * spaces from the indent of the line with an unclosed parentheses
	 */
	int ind_unclosed = curbuf->b_p_sw * 2;

	/*
	 * spaces from the comment opener when there is nothing after it.
	 */
	int ind_in_comment = 3;

	/*
	 * max lines to search for an open paren
	 */
	int ind_maxparen = 20;

	/*
	 * max lines to search for an open comment
	 */
	int ind_maxcomment = 30;

	FPOS		cur_curpos;
	int			amount;
	int			scope_amount;
	int			cur_amount;
	colnr_t		col;
	char_u		*theline;
	char_u		*linecopy;
	FPOS		*trypos;
	FPOS		our_paren_pos;
	char_u		*start;
	int			start_brace;
#define BRACE_IN_COL0	1			/* '{' is in comumn 0 */
#define BRACE_AT_START	2			/* '{' is at start of line */
#define BRACE_AT_END	3			/* '{' is at end of line */
	linenr_t	ourscope;
	char_u		*l;
	char_u		*look;
	int			lookfor;
#define LOOKFOR_IF		1
#define LOOKFOR_DO		2
#define LOOKFOR_CASE	3
#define LOOKFOR_ANY		4
#define LOOKFOR_TERM	5
#define LOOKFOR_UNTERM	6
	int			whilelevel;
	linenr_t	lnum;
	char_u		*options;
	int			fraction = 0;		/* init for GCC */
	int			divider;
	int			n;

	for (options = curbuf->b_p_cino; *options; )
	{
		l = options++;
		if (*options == '-')
			++options;
		n = getdigits(&options);
		divider = 0;
		if (*options == '.')		/* ".5s" means a fraction */
		{
			fraction = atol((char *)++options);
			while (isdigit(*options))
			{
				++options;
				if (divider)
					divider *= 10;
				else
					divider = 10;
			}
		}
		if (*options == 's')		/* "2s" means two times 'shiftwidth' */
		{
			if (n == 0 && fraction == 0)
				n = curbuf->b_p_sw;		/* just "s" is one 'shiftwidth' */
			else
			{
				n *= curbuf->b_p_sw;
				if (divider)
					n += (curbuf->b_p_sw * fraction + divider / 2) / divider;
			}
			++options;
		}
		if (l[1] == '-')
			n = -n;
		switch (*l)
		{
			case '>': ind_level = n; break;
			case 'e': ind_open_imag = n; break;
			case 'n': ind_no_brace = n; break;
			case 'f': ind_first_open = n; break;
			case '{': ind_open_extra = n; break;
			case '}': ind_close_extra = n; break;
			case '^': ind_open_left_imag = n; break;
			case ':': ind_case = n; break;
			case '=': ind_case_code = n; break;
			case 'p': ind_param = n; break;
			case 't': ind_func_type = n; break;
			case 'c': ind_in_comment = n; break;
			case '+': ind_continuation = n; break;
			case '(': ind_unclosed = n; break;
			case ')': ind_maxparen = n; break;
			case '*': ind_maxcomment = n; break;
		}
	}

	/* remember where the cursor was when we started */

	cur_curpos = curwin->w_cursor;

	/* get the current contents of the line.
	 * This is required, because onle the most recent line obtained with
	 * ml_get is valid! */

	linecopy = strsave(ml_get(cur_curpos.lnum));
	if (linecopy == NULL)
		return 0;

	/*
	 * In insert mode and the cursor is on a ')' trunctate the line at the
	 * cursor position.  We don't want to line up with the matching '(' when
	 * inserting new stuff.
	 */
	if ((State & INSERT) && linecopy[curwin->w_cursor.col] == ')')
		linecopy[curwin->w_cursor.col] = NUL;

	theline = skipwhite(linecopy);

	/* move the cursor to the start of the line */

	curwin->w_cursor.col = 0;

	/*
	 * #defines and so on always go at the left when included in 'cinkeys'.
	 */
	if (*theline == '#' && (*linecopy == '#' || in_cinkeys('#', ' ', TRUE)))
	{
		amount = 0;
	}

	/* 
	 * Is it a non-case label?  Then that goes at the left margin too.
  	 */
	else if (islabel(ind_maxcomment))		/* XXX */
	{
		amount = 0;
	}

	/* 
	 * If we're inside a comment and not looking at the start of the
	 * comment...
	 */
	else if (!iscomment(theline) &&
			  (trypos = find_start_comment(ind_maxcomment)) != NULL) /* XXX */
	{

		/* find how indented the line beginning the comment is */
		getvcol(curwin, trypos, &col, NULL, NULL);
		amount = col;

		/* if our line starts with an asterisk, line up with the
		 * asterisk in the comment opener; otherwise, line up
		 * with the first character of the comment text.
		 */
		if (theline[0] == '*')
		{
			amount += 1;
		}
		else
		{
			/*
			 * If we are more than one line away from the comment opener, take
			 * the indent of the previous non-empty line.
			 * If we are just below the comment opener and there are any
			 * white characters after it line up with the text after it.
			 * up with them; otherwise, just use a single space.
			 */
			amount = -1;
			for (lnum = cur_curpos.lnum - 1; lnum > trypos->lnum; --lnum)
			{
				if (linewhite(lnum))				/* skip blank lines */
					continue;
				amount = get_indent_lnum(lnum);		/* XXX */
				break;
			}
			if (amount == -1)						/* use the comment opener */
			{
				start = ml_get(trypos->lnum);
				look = start + trypos->col + 2;  	/* skip / and * */
				if (*look)							/* if something after it */
					trypos->col = skipwhite(look) - start;
				getvcol(curwin, trypos, &col, NULL, NULL);
				amount = col;
				if (!*look)
					amount += ind_in_comment;
			}
		}
	}

	/*
	 * Are we inside parentheses?
	 */												/* XXX */
	else if ((trypos = find_match_paren(ind_maxparen, ind_maxcomment)) != NULL)
	{
		/*
		 * If the matching paren is more than one line away, use the indent of
		 * a previous non-empty line that matches the same paren.
		 */
		amount = -1;
		our_paren_pos = *trypos;
		if (theline[0] != ')')
		{
			for (lnum = cur_curpos.lnum - 1; lnum > our_paren_pos.lnum; --lnum)
			{
				l = skipwhite(ml_get(lnum));
				if (commentorempty(l))		/* skip comment lines */
					continue;
				if (ispreproc(l))			/* ignore #defines, #if, etc. */
					continue;
				curwin->w_cursor.lnum = lnum;
				/* XXX */
				if ((trypos = find_match_paren(ind_maxparen,
												   ind_maxcomment)) != NULL &&
										 trypos->lnum == our_paren_pos.lnum &&
											 trypos->col == our_paren_pos.col)
				{
					amount = get_indent_lnum(lnum);		/* XXX */
					break;
				}
			}
		}

		/*
		 * Line up with line where the matching paren is.
		 * If the line starts with a '(' or the indent for unclosed
		 * parentheses is zero, line up with the unclosed parentheses.
		 */
		if (amount == -1)
		{
			amount = skip_label(our_paren_pos.lnum, &look, ind_maxcomment);
			if (theline[0] == ')' || ind_unclosed == 0 ||
													  *skipwhite(look) == '(')
			{

				/* 
				 * If we're looking at a close paren, line up right there;
				 * otherwise, line up with the next non-white character.
				 */
				if (theline[0] != ')')
				{
					col = our_paren_pos.col + 1;
					look = ml_get(our_paren_pos.lnum);
					while (vim_iswhite(look[col]))
						col++;
					if (look[col] != NUL)		/* In case of trailing space */
						our_paren_pos.col = col;
					else
						our_paren_pos.col++;
				}

				/*
				 * Find how indented the paren is, or the character after it if
				 * we did the above "if".
				 */
				getvcol(curwin, &our_paren_pos, &col, NULL, NULL);
				amount = col;
			}
			else
				amount += ind_unclosed;
		}
	}

	/*
	 * Are we at least inside braces, then?
	 */
	else if ((trypos = find_start_brace(ind_maxcomment)) != NULL) /* XXX */
	{
		ourscope = trypos->lnum;
		start = ml_get(ourscope);

		/* 
		 * Now figure out how indented the line is in general.
		 * If the brace was at the start of the line, we use that;
		 * otherwise, check out the indentation of the line as
		 * a whole and then add the "imaginary indent" to that.
		 */
		look = skipwhite(start);
		if (*look == '{')
		{
			getvcol(curwin, trypos, &col, NULL, NULL);
			amount = col;
			if (*start == '{')
				start_brace = BRACE_IN_COL0;
			else
				start_brace = BRACE_AT_START;
		}
		else
		{
			/* 
			 * that opening brace might have been on a continuation
			 * line.  if so, find the start of the line.
			 */
			curwin->w_cursor.lnum = ourscope;

			/* 
			 * position the cursor over the rightmost paren, so that
			 * matching it will take us back to the start of the line.
			 */
			lnum = ourscope;
			if (find_last_paren(start) &&
					(trypos = find_match_paren(ind_maxparen,
													 ind_maxcomment)) != NULL)
				lnum = trypos->lnum;

			/*
			 * It could have been something like
			 *     case 1: if (asdf &&
			 *     				ldfd) {
			 *     			}
			 */
			amount = skip_label(lnum, &l, ind_maxcomment);

			start_brace = BRACE_AT_END;
		}

		/* 
		 * if we're looking at a closing brace, that's where
		 * we want to be.  otherwise, add the amount of room
		 * that an indent is supposed to be.
		 */
		if (theline[0] == '}')
		{
			/* 
			 * they may want closing braces to line up with something
			 * other than the open brace.  indulge them, if so. 
			 */
			amount += ind_close_extra;
		}
		else
		{
			/* 
			 * If we're looking at an "else", try to find an "if"
			 * to match it with.
			 * If we're looking at a "while", try to find a "do"
			 * to match it with.
			 */
			lookfor = 0;
			if (iselse(theline))
				lookfor = LOOKFOR_IF;
			else if (iswhileofdo(theline, cur_curpos.lnum, ind_maxparen))
																	/* XXX */
				lookfor = LOOKFOR_DO;
			if (lookfor)
			{
				curwin->w_cursor.lnum = cur_curpos.lnum;
				if (find_match(lookfor, ourscope, ind_maxparen,
														ind_maxcomment) == OK)
				{
					amount = get_indent();		/* XXX */
					goto theend;
				}
			}

			/* 
			 * We get here if we are not on an "while-of-do" or "else" (or
			 * failed to find a matching "if").
			 * Search backwards for something to line up with.
			 * First set amount for when we don't find anything.
			 */

			/* 
			 * if the '{' is  _really_ at the left margin, use the imaginary
			 * location of a left-margin brace.  Otherwise, correct the
			 * location for ind_open_extra.
			 */

			if (start_brace == BRACE_IN_COL0)		/* '{' is in column 0 */
			{
				amount = ind_open_left_imag;
			}
			else 
			{
				if (start_brace == BRACE_AT_END)	/* '{' is at end of line */
					amount += ind_open_imag;
				else
				{
					amount -= ind_open_extra;
					if (amount < 0)
						amount = 0;
				}
			}

			if (iscase(theline))		/* it's a switch() label */
			{
				lookfor = LOOKFOR_CASE;	/* find a previous switch() label */
				amount += ind_case;
			}
			else
			{
				lookfor = LOOKFOR_ANY;
				amount += ind_level;	/* ind_level from start of block */
			}
			scope_amount = amount;
			whilelevel = 0;

			/*
			 * Search backwards.  If we find something we recognize, line up
			 * with that.
			 *
			 * if we're looking at an open brace, indent
			 * the usual amount relative to the conditional
			 * that opens the block.
			 */
			curwin->w_cursor = cur_curpos;
			for (;;)
			{
				curwin->w_cursor.lnum--;
				curwin->w_cursor.col = 0;

				/*
				 * If we went all the way back to the start of our scope, line
				 * up with it.
				 */
				if (curwin->w_cursor.lnum <= ourscope)
				{
					if (lookfor == LOOKFOR_UNTERM)
						amount += ind_continuation;
					else if (lookfor != LOOKFOR_TERM)
						amount = scope_amount;
					break;
				}

				/*
				 * If we're in a comment now, skip to the start of the comment.
				 */											/* XXX */
				if ((trypos = find_start_comment(ind_maxcomment)) != NULL)
				{
					curwin->w_cursor.lnum = trypos->lnum + 1;
					continue;
				}

				l = ml_get_curline();

				/*
				 * If this is a switch() label, may line up relative to that.
				 */
				if (iscase(l))
				{
					/*
					 *  case xx:
					 * 	    c = 99 +		<- this indent plus continuation
					 *->           here;
					 */
					if (lookfor == LOOKFOR_UNTERM)
					{
						amount += ind_continuation;
						break;
					}

					/*
					 *  case xx:		<- line up with this case
					 *      x = 333;
					 *  case yy:
					 */
					if (lookfor == LOOKFOR_CASE)
					{
						/*
						 * Check that this case label is not for another
						 * switch()
						 */									/* XXX */
						if ((trypos = find_start_brace(ind_maxcomment)) ==
											 NULL || trypos->lnum == ourscope)
						{
							amount = get_indent();		/* XXX */
							break;
						}
						continue;
					}

					n = get_indent_nolabel(curwin->w_cursor.lnum);  /* XXX */

					/*
					 *   case xx: if (cond)			<- line up with this if
					 *                y = y + 1;
					 * ->         s = 99;
					 *
					 *   case xx:
					 *       if (cond)			<- line up with this line
					 *           y = y + 1;
					 * ->    s = 99;
					 */
					if (lookfor == LOOKFOR_TERM)
					{
						if (n)
							amount = n;
						break;
					}

					/*
					 *   case xx: x = x + 1;		<- line up with this x
					 * ->         y = y + 1;
					 *
					 *   case xx: if (cond)			<- line up with this if
					 * ->              y = y + 1;
					 */
					if (n)
					{
						amount = n;
						l = after_label(ml_get_curline());
						if (l != NULL && is_cinword(l))
							amount += ind_level + ind_no_brace;
						break;
					}

					/*
					 *   Try to get the indent of a statement before the
					 *   switch label.  If nothing is found, line up relative
					 *   to the switch label.
					 *   	break;				<- may line up with this line
					 *   case xx:
					 * ->   y = 1;
					 */
					scope_amount = get_indent() + ind_case_code;	/* XXX */
					lookfor = LOOKFOR_ANY;
					continue;
				}

				/*
				 * Looking for a switch() label, ignore other lines.
				 */
				if (lookfor == LOOKFOR_CASE)
					continue;

				/*
				 * Ignore jump labels with nothing after them.
				 */
				if (islabel(ind_maxcomment))
				{
					l = after_label(ml_get_curline());
					if (l == NULL || commentorempty(l))
						continue;
				}

				/*
				 * Ignore #defines, #if, etc.
				 * Ignore comment and empty lines.
				 * (need to get the line again, islabel() may have unlocked it)
				 */
				l = ml_get_curline();
				if (ispreproc(l) || commentorempty(l))
					continue;

				/*
				 * What happens next depends on the line being terminated.
				 */
				if (!isterminated(l))
				{
					/* 
					 * if we're in the middle of a paren thing,
					 * go back to the line that starts it so
					 * we can get the right prevailing indent
					 *     if ( foo &&
					 *             	bar )
					 */
					/* 
					 * position the cursor over the rightmost paren, so that
					 * matching it will take us back to the start of the line.
					 */
					(void)find_last_paren(l);
					if ((trypos = find_match_paren(ind_maxparen,
													 ind_maxcomment)) != NULL)
					{
						/*
						 * Check if we are on a case label now.  This is
						 * handled above.
						 *     case xx:  if ( asdf &&
						 *                      asdf)
						 */
						curwin->w_cursor.lnum = trypos->lnum;
						l = ml_get_curline();
						if (iscase(l))
						{
							++curwin->w_cursor.lnum;
							continue;
						}
					}

					/*
					 * Get indent and pointer to text for current line,
					 * ignoring any jump label.		XXX
					 */
					cur_amount = skip_label(curwin->w_cursor.lnum,
														  &l, ind_maxcomment);

					/*
					 * If this is just above the line we are indenting, and it
					 * starts with a '{', line it up with this line.
					 * 			while (not)
					 * ->		{
					 * 			}
					 */
					if (lookfor != LOOKFOR_TERM && theline[0] == '{')
					{
						amount = cur_amount + ind_open_extra;
						break;
					}

					/*
					 * Check if we are after an "if", "while", etc.
					 * Also allow "} else".
					 */
					if (is_cinword(l) || iselse(l))
					{
						/*
						 * Found an unterminated line after an if (), line up
						 * with the last one.
						 *	 if (cond)
						 *			100 +
						 * ->			here;
						 */
						if (lookfor == LOOKFOR_UNTERM)
						{
							amount += ind_continuation;
							break;
						}

						/*
						 * If this is just above the line we are indenting, we
						 * are finished.
						 * 			while (not)
						 * ->			here;
						 * Otherwise this indent can be used when the line
						 * before this is terminated.
						 * 		yyy;
						 * 		if (stat)
						 * 			while (not)
						 * 				xxx;
						 * ->	here;
						 */
						amount = cur_amount;
						if (lookfor != LOOKFOR_TERM)
						{
							amount += ind_level + ind_no_brace;
							break;
						}

						/*
						 * Special trick: when expecting the while () after a
						 * do, line up with the while()
						 *     do
						 *          x = 1;
						 * ->  here
						 */
						l = skipwhite(ml_get_curline());
						if (isdo(l))
						{
							if (whilelevel == 0)
								break;
							--whilelevel;
						}

						/*
						 * When searching for a terminated line, don't use the
						 * one between the "if" and the "else".
						 */
						if (iselse(l))
						{
							if (find_match(LOOKFOR_IF, ourscope,
										ind_maxparen, ind_maxcomment) == FAIL)
								break;
						}
					}

					/* 
					 * If we're below an unterminated line that is not an
					 * "if" or something, we may line up with this line or
					 * add someting for a continuation line, depending on
					 * the line before this one.
					 */
					else
					{
						/*
						 * Found two unterminated lines on a row, line up with
						 * the last one.
						 *	 c = 99 +
						 *			100 +
						 * ->		here;
						 */
						if (lookfor == LOOKFOR_UNTERM)
							break;

						/*
						 * Found first unterminated line on a row, may line up
						 * with this line, remember its indent
						 *			100 +
						 * ->		here;
						 */
						amount = cur_amount;
						if (lookfor != LOOKFOR_TERM)
							lookfor = LOOKFOR_UNTERM;
					}
				}

				/*
				 * Check if we are after a while (cond);
				 * If so: Ignore until the matching "do".
				 */
														/* XXX */
				else if (iswhileofdo(l, curwin->w_cursor.lnum, ind_maxparen))
				{
					/*
					 * Found an unterminated line after a while ();, line up
					 * with the last one.
					 *		while (cond);
					 *		100 +				<- line up with this one
					 * ->			here;
					 */
					if (lookfor == LOOKFOR_UNTERM)
					{
						amount += ind_continuation;
						break;
					}

					if (whilelevel == 0)
					{
						lookfor = LOOKFOR_TERM;
						amount = get_indent();		/* XXX */
						if (theline[0] == '{')
							amount += ind_open_extra;
					}
					++whilelevel;
				}

				/*
				 * We are after a "normal" statement.
				 * If we had another statement we can stop now and use the
				 * indent of that other statement.
				 * Otherwise the indent of the current statement may be used,
				 * search backwards for the next "normal" statement.
				 */
				else
				{
					/*
					 * Found a terminated line above an unterminated line. Add
					 * the amount for a continuation line.
					 *   x = 1;
					 *   y = foo +
					 * ->		here;
					 */
					if (lookfor == LOOKFOR_UNTERM)
					{
						amount += ind_continuation;
						break;
					}

					/*
					 * Found a terminated line above a terminated line or "if"
					 * etc. line. Use the amount of the line below us.
					 *   x = 1;							x = 1;
					 *   if (asdf)					y = 2;
					 *		 while (asdf)         ->here;
					 *		 	here;
					 * ->foo;
					 */
					if (lookfor == LOOKFOR_TERM)
					{
						if (whilelevel == 0)
							break;
					}

					/*
					 * First line above the one we're indenting is terminated.
					 * To know what needs to be done look further backward for
					 * a terminated line.
					 */
					else
					{
						/* 
						 * position the cursor over the rightmost paren, so
						 * that matching it will take us back to the start of
						 * the line.  Helps for:
						 *     func(asdr,
						 *            asdfasdf);
						 *     here;
						 */
						l = ml_get_curline();
						if (find_last_paren(l) &&
								(trypos = find_match_paren(ind_maxparen,
													 ind_maxcomment)) != NULL)
						{
							/*
							 * Check if we are on a case label now.  This is
							 * handled above.
							 *     case xx:  if ( asdf &&
							 *                      asdf)
							 */
							curwin->w_cursor.lnum = trypos->lnum;
							l = ml_get_curline();
							if (iscase(l))
							{
								++curwin->w_cursor.lnum;
								continue;
							}
						}

						/*
						 * Get indent and pointer to text for current line,
						 * ignoring any jump label.
						 */
						amount = skip_label(curwin->w_cursor.lnum,
														  &l, ind_maxcomment);

						if (theline[0] == '{')
							amount += ind_open_extra;
						lookfor = LOOKFOR_TERM;

						/*
						 * If we're at the end of a block, skip to the start of
						 * that block.
						 */
						if (*skipwhite(l) == '}' &&
								   (trypos = find_start_brace(ind_maxcomment))
															!= NULL) /* XXX */
							curwin->w_cursor.lnum = trypos->lnum;
					}
				}
			}
		}
	}

	/* 
	 * ok -- we're not inside any sort of structure at all!
	 *
	 * this means we're at the top level, and everything should
	 * basically just match where the previous line is, except
	 * for the lines immediately following a function declaration,
	 * which are K&R-style parameters and need to be indented.
	 */
	else
	{
		/* 
		 * if our line starts with an open brace, forget about any 
		 * prevailing indent and make sure it looks like the start 
		 * of a function
		 */

		if (theline[0] == '{')
		{
			amount = ind_first_open;
		}

		/* 
		 * If the NEXT line is a function declaration, the current
		 * line needs to be indented as a function type spec.
		 * Don't do this if the current line looks like a comment.
		 */
		else if (cur_curpos.lnum < curbuf->b_ml.ml_line_count &&
												   !commentorempty(theline) &&
									  isfuncdecl(ml_get(cur_curpos.lnum + 1)))
		{
			amount = ind_func_type;
		}
		else
		{
			amount = 0;
			curwin->w_cursor = cur_curpos;

			/* search backwards until we find something we recognize */

			while (curwin->w_cursor.lnum > 1)
			{
				curwin->w_cursor.lnum--;
				curwin->w_cursor.col = 0;

				l = ml_get_curline();

				/*
				 * If we're in a comment now, skip to the start of the comment.
				 */												/* XXX */
				if ((trypos = find_start_comment(ind_maxcomment)) != NULL)
				{
					curwin->w_cursor.lnum = trypos->lnum + 1;
					continue;
				}

				/*
				 * If the line looks like a function declaration, and we're
				 * not in a comment, put it the left margin.
				 */
				if (isfuncdecl(theline))
					break;

				/* 
				 * Skip preprocessor directives and blank lines.
				 */
				if (ispreproc(l))
					continue;

				if (commentorempty(l))
					continue;

				/* 
				 * If the PREVIOUS line is a function declaration, the current
				 * line (and the ones that follow) needs to be indented as
				 * parameters.
				 */
				if (isfuncdecl(l))
				{
					amount = ind_param;
					break;
				}

				/* 
				 * Doesn't look like anything interesting -- so just
				 * use the indent of this line.
				 * 
				 * Position the cursor over the rightmost paren, so that
				 * matching it will take us back to the start of the line.
				 */
				find_last_paren(l);

				if ((trypos = find_match_paren(ind_maxparen,
													 ind_maxcomment)) != NULL)
					curwin->w_cursor.lnum = trypos->lnum;
				amount = get_indent();		/* XXX */
				break;
			}
		}
	}

theend:
	/* put the cursor back where it belongs */
	curwin->w_cursor = cur_curpos;

	vim_free(linecopy);

	if (amount < 0)
		return 0;
	return amount;
}

	static int
find_match(lookfor, ourscope, ind_maxparen, ind_maxcomment)
	int			lookfor;
	linenr_t	ourscope;
	int			ind_maxparen;
	int			ind_maxcomment;
{
	char_u		*look;
	FPOS		*theirscope;
	char_u		*mightbeif;
	int			elselevel;
	int			whilelevel;

	if (lookfor == LOOKFOR_IF)
	{
		elselevel = 1;
		whilelevel = 0;
	}
	else
	{
		elselevel = 0;
		whilelevel = 1;
	}

	curwin->w_cursor.col = 0;

	while (curwin->w_cursor.lnum > ourscope + 1)
	{
		curwin->w_cursor.lnum--;
		curwin->w_cursor.col = 0;

		look = skipwhite(ml_get_curline());
		if (iselse(look) || isif(look) || isdo(look) ||
			 iswhileofdo(look, curwin->w_cursor.lnum, ind_maxparen))  /* XXX */
		{
			/* 
			 * if we've gone outside the braces entirely,
			 * we must be out of scope...
			 */
			theirscope = find_start_brace(ind_maxcomment);	/* XXX */
			if (theirscope == NULL)
				break;

			/* 
			 * and if the brace enclosing this is further
			 * back than the one enclosing the else, we're
			 * out of luck too.
			 */
			if (theirscope->lnum < ourscope)
				break;

			/* 
			 * and if they're enclosed in a *deeper* brace,
			 * then we can ignore it because it's in a
			 * different scope...
			 */
			if (theirscope->lnum > ourscope)
				continue;

			/* 
			 * if it was an "else" (that's not an "else if")
			 * then we need to go back to another if, so 
			 * increment elselevel
			 */
			look = skipwhite(ml_get_curline());
			if (iselse(look))
			{
				mightbeif = skipwhite(look + 4);
				if (!isif(mightbeif))
					++elselevel;
				continue;
			}

			/* 
			 * if it was a "while" then we need to go back to
			 * another "do", so increment whilelevel.
			 */
			if (iswhileofdo(look, curwin->w_cursor.lnum, ind_maxparen))/* XXX */
			{
				++whilelevel;
				continue;
			}

			/* If it's an "if" decrement elselevel */
			look = skipwhite(ml_get_curline());
			if (isif(look))
			{
				elselevel--;
				/*
				 * When looking for an "if" ignore "while"s that
				 * get in the way.
				 */
				if (elselevel == 0 && lookfor == LOOKFOR_IF)
					whilelevel = 0;
			}

			/* If it's a "do" decrement whilelevel */
			if (isdo(look))
				whilelevel--;

			/* 
			 * if we've used up all the elses, then
			 * this must be the if that we want!
			 * match the indent level of that if.
			 */
			if (elselevel <= 0 && whilelevel <= 0)
			{
				return OK;
			}
		}
	}
	return FAIL;
}

#endif /* CINDENT */

#ifdef LISPINDENT
	int
get_lisp_indent()
{
	FPOS		*pos, realpos;
	long		amount = 0;
	char_u		*that;
	colnr_t		col;
	colnr_t		maybe;
	colnr_t		firsttry;


	realpos = curwin->w_cursor;
	curwin->w_cursor.col = 0;

	if ((pos = findmatch('(')) != NULL)
	{
		curwin->w_cursor.lnum = pos->lnum;
		curwin->w_cursor.col = pos->col;
		col = pos->col;

		that = ml_get_curline();
		maybe = get_indent();		/* XXX */

		if (maybe == 0)
			amount = 2;
		else
		{
			while (*that && col)
			{
				amount += lbr_chartabsize(that, (colnr_t)amount);
				col--;
				that++;
			}

 			that++;
			amount++;
			firsttry = amount;

			/*
			 * Go to the start of the second word.
			 * If there is no second word, go back to firsttry.
			 * Also stop at a '('.
			 */

			while (vim_iswhite(*that))
			{
				amount += lbr_chartabsize(that, (colnr_t)amount);
				that++;
			}
			while (*that && !vim_iswhite(*that) && *that != '(')
			{
				amount += lbr_chartabsize(that, (colnr_t)amount);
				that++;
			}
			while (vim_iswhite(*that))
			{
				amount += lbr_chartabsize(that, (colnr_t)amount);
				that++;
			}
			if (! *that)
				amount = firsttry;
		}
	}
	else	/* no matching '(' found, use indent of previous non-empty line */
	{
		while (curwin->w_cursor.lnum > 1)
		{
			--curwin->w_cursor.lnum;
			if (!linewhite(curwin->w_cursor.lnum))
				break;
		}
		amount = get_indent();		/* XXX */
	}

	curwin->w_cursor = realpos;

	if (amount < 0)
		amount = 0;
	return (int)amount;
}
#endif /* LISPINDENT */

#if defined(UNIX) || defined(WIN32) || defined(__EMX__)
/*
 * Preserve files and exit.
 * When called IObuff must contain a message.
 */
	void
preserve_exit()
{
	BUF		*buf;

#ifdef USE_GUI
	if (gui.in_use)
	{
		gui.dying = TRUE;
		trash_output_buf();		/* trash any pending output */
	}
	else
#endif
	{
		windgoto((int)Rows - 1, 0);

		/*
		 * Switch terminal mode back now, so these messages end up on the
		 * "normal" screen (if there are two screens).
		 */
		settmode(0);
#ifdef WIN32
		if (can_end_termcap_mode(FALSE) == TRUE)
#endif
			stoptermcap();
		flushbuf();
	}

	outstr(IObuff);
	screen_start();					/* don't know where cursor is now */
	flushbuf();

	ml_close_notmod();				/* close all not-modified buffers */

	for (buf = firstbuf; buf != NULL; buf = buf->b_next)
	{
		if (buf->b_ml.ml_mfp != NULL && buf->b_ml.ml_mfp->mf_fname != NULL)
		{
			OUTSTR("Vim: preserving files...\n");
			screen_start();			/* don't know where cursor is now */
			flushbuf();
			ml_sync_all(FALSE, FALSE);	/* preserve all swap files */
			break;
		}
	}

	ml_close_all(FALSE);			/* close all memfiles, without deleting */

	OUTSTR("Vim: Finished.\n");

	getout(1);
}
#endif /* defined(UNIX) || defined(WIN32) || defined(__EMX__) */

/*
 * return TRUE if "fname" exists.
 */
	int
vim_fexists(fname)
	char_u	*fname;
{
	struct stat st;

	if (stat((char *)fname, &st))
		return FALSE;
	return TRUE;
}

/*
 * Check for CTRL-C pressed, but only once in a while.
 * Should be used instead of mch_breakcheck() for functions that check for
 * each line in the file.  Calling mch_breakcheck() each time takes too much
 * time, because it can be a system call.
 */

#ifndef BREAKCHECK_SKIP
# define BREAKCHECK_SKIP 32
#endif

	void
line_breakcheck()
{
	static int	count = 0;

	if (++count == BREAKCHECK_SKIP)
	{
		count = 0;
		mch_breakcheck();
	}
}

/*
 * Free the list of files returned by ExpandWildCards() or other expansion
 * functions.
 */
	void
FreeWild(num, file)
	int		num;
	char_u	**file;
{
	if (file == NULL || num == 0)
		return;
#if defined(__EMX__) && defined(__ALWAYS_HAS_TRAILING_NULL_POINTER) /* XXX */
	/*
	 * Is this still OK for when other functions thatn ExpandWildCards() have
	 * been used???
	 */
	_fnexplodefree((char **)file);
#else
	while (num--)
		vim_free(file[num]);
	vim_free(file);
#endif
}