patch 8.1.2127: the indent.c file is a bit bigv8.1.2127

Problem:    The indent.c file is a bit big.
Solution:   Move C-indent code a a new cindent.c file.  Move other
            indent-related code to indent.c. (Yegappan Lakshmanan,
            closes #5031)

1 files changed, 1319 insertions, 4089 deletions

diff --git a/src/indent.c b/src/indent.c
index dacafcbc0..4abe05b2d 100644
--- a/src/indent.c
+++ b/src/indent.c
@@ -13,3873 +13,1683 @@
 
 #include "vim.h"
 
-#if defined(FEAT_CINDENT) || defined(FEAT_SMARTINDENT)
-
-static int cin_iscase(char_u *s, int strict);
-static int cin_isscopedecl(char_u *s);
+#if defined(FEAT_VARTABS) || defined(PROTO)
 
 /*
- * Return TRUE if the string "line" starts with a word from 'cinwords'.
+ * Set the integer values corresponding to the string setting of 'vartabstop'.
+ * "array" will be set, caller must free it if needed.
  */
     int
-cin_is_cinword(char_u *line)
+tabstop_set(char_u *var, int **array)
 {
-    char_u	*cinw;
-    char_u	*cinw_buf;
-    int		cinw_len;
-    int		retval = FALSE;
-    int		len;
+    int valcount = 1;
+    int t;
+    char_u *cp;
 
-    cinw_len = (int)STRLEN(curbuf->b_p_cinw) + 1;
-    cinw_buf = alloc(cinw_len);
-    if (cinw_buf != NULL)
+    if (var[0] == NUL || (var[0] == '0' && var[1] == NUL))
     {
-	line = skipwhite(line);
-	for (cinw = curbuf->b_p_cinw; *cinw; )
+	*array = NULL;
+	return TRUE;
+    }
+
+    for (cp = var; *cp != NUL; ++cp)
+    {
+	if (cp == var || cp[-1] == ',')
 	{
-	    len = copy_option_part(&cinw, cinw_buf, cinw_len, ",");
-	    if (STRNCMP(line, cinw_buf, len) == 0
-		    && (!vim_iswordc(line[len]) || !vim_iswordc(line[len - 1])))
+	    char_u *end;
+
+	    if (strtol((char *)cp, (char **)&end, 10) <= 0)
 	    {
-		retval = TRUE;
-		break;
+		if (cp != end)
+		    emsg(_(e_positive));
+		else
+		    emsg(_(e_invarg));
+		return FALSE;
 	    }
 	}
-	vim_free(cinw_buf);
-    }
-    return retval;
-}
-#endif
-
-#if defined(FEAT_CINDENT) || defined(FEAT_SYN_HL)
-
-static char_u	*skip_string(char_u *p);
-static pos_T *find_start_rawstring(int ind_maxcomment);
-
-/*
- * 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.
- * Return NULL when not inside a comment.
- */
-    static pos_T *
-ind_find_start_comment(void)	    // XXX
-{
-    return find_start_comment(curbuf->b_ind_maxcomment);
-}
-
-    pos_T *
-find_start_comment(int ind_maxcomment)	// XXX
-{
-    pos_T	*pos;
-    char_u	*line;
-    char_u	*p;
-    int		cur_maxcomment = ind_maxcomment;
-
-    for (;;)
-    {
-	pos = findmatchlimit(NULL, '*', FM_BACKWARD, cur_maxcomment);
-	if (pos == NULL)
-	    break;
 
-	// Check if the comment start we found is inside a string.
-	// If it is then restrict the search to below this line and try again.
-	line = ml_get(pos->lnum);
-	for (p = line; *p && (colnr_T)(p - line) < pos->col; ++p)
-	    p = skip_string(p);
-	if ((colnr_T)(p - line) <= pos->col)
-	    break;
-	cur_maxcomment = curwin->w_cursor.lnum - pos->lnum - 1;
-	if (cur_maxcomment <= 0)
+	if (VIM_ISDIGIT(*cp))
+	    continue;
+	if (cp[0] == ',' && cp > var && cp[-1] != ',' && cp[1] != NUL)
 	{
-	    pos = NULL;
-	    break;
+	    ++valcount;
+	    continue;
 	}
+	emsg(_(e_invarg));
+	return FALSE;
     }
-    return pos;
-}
 
-/*
- * Find the start of a comment or raw string, not knowing if we are in a
- * comment or raw string right now.
- * Search starts at w_cursor.lnum and goes backwards.
- * If is_raw is given and returns start of raw_string, sets it to true.
- * Return NULL when not inside a comment or raw string.
- * "CORS" -> Comment Or Raw String
- */
-    static pos_T *
-ind_find_start_CORS(linenr_T *is_raw)	    // XXX
-{
-    static pos_T comment_pos_copy;
-    pos_T	*comment_pos;
-    pos_T	*rs_pos;
+    *array = ALLOC_MULT(int, valcount + 1);
+    if (*array == NULL)
+	return FALSE;
+    (*array)[0] = valcount;
 
-    comment_pos = find_start_comment(curbuf->b_ind_maxcomment);
-    if (comment_pos != NULL)
+    t = 1;
+    for (cp = var; *cp != NUL;)
     {
-	// Need to make a copy of the static pos in findmatchlimit(),
-	// calling find_start_rawstring() may change it.
-	comment_pos_copy = *comment_pos;
-	comment_pos = &comment_pos_copy;
+	(*array)[t++] = atoi((char *)cp);
+	while (*cp  != NUL && *cp != ',')
+	    ++cp;
+	if (*cp != NUL)
+	    ++cp;
     }
-    rs_pos = find_start_rawstring(curbuf->b_ind_maxcomment);
 
-    // If comment_pos is before rs_pos the raw string is inside the comment.
-    // If rs_pos is before comment_pos the comment is inside the raw string.
-    if (comment_pos == NULL || (rs_pos != NULL
-					     && LT_POS(*rs_pos, *comment_pos)))
-    {
-	if (is_raw != NULL && rs_pos != NULL)
-	    *is_raw = rs_pos->lnum;
-	return rs_pos;
-    }
-    return comment_pos;
+    return TRUE;
 }
 
 /*
- * Find the start of a raw string, not knowing if we are in one right now.
- * Search starts at w_cursor.lnum and goes backwards.
- * Return NULL when not inside a raw string.
+ * Calculate the number of screen spaces a tab will occupy.
+ * If "vts" is set then the tab widths are taken from that array,
+ * otherwise the value of ts is used.
  */
-    static pos_T *
-find_start_rawstring(int ind_maxcomment)	// XXX
+    int
+tabstop_padding(colnr_T col, int ts_arg, int *vts)
 {
-    pos_T	*pos;
-    char_u	*line;
-    char_u	*p;
-    int		cur_maxcomment = ind_maxcomment;
-
-    for (;;)
-    {
-	pos = findmatchlimit(NULL, 'R', FM_BACKWARD, cur_maxcomment);
-	if (pos == NULL)
-	    break;
+    int		ts = ts_arg == 0 ? 8 : ts_arg;
+    int		tabcount;
+    colnr_T	tabcol = 0;
+    int		t;
+    int		padding = 0;
 
-	// Check if the raw string start we found is inside a string.
-	// If it is then restrict the search to below this line and try again.
-	line = ml_get(pos->lnum);
-	for (p = line; *p && (colnr_T)(p - line) < pos->col; ++p)
-	    p = skip_string(p);
-	if ((colnr_T)(p - line) <= pos->col)
-	    break;
-	cur_maxcomment = curwin->w_cursor.lnum - pos->lnum - 1;
-	if (cur_maxcomment <= 0)
-	{
-	    pos = NULL;
-	    break;
-	}
-    }
-    return pos;
-}
+    if (vts == NULL || vts[0] == 0)
+	return ts - (col % ts);
 
-/*
- * Skip to the end of a "string" and a 'c' character.
- * If there is no string or character, return argument unmodified.
- */
-    static char_u *
-skip_string(char_u *p)
-{
-    int	    i;
+    tabcount = vts[0];
 
-    // We loop, because strings may be concatenated: "date""time".
-    for ( ; ; ++p)
+    for (t = 1; t <= tabcount; ++t)
     {
-	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 (vim_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] != NUL)
-		    ++p;
-		else if (p[0] == '"')	    // end of string
-		    break;
-	    }
-	    if (p[0] == '"')
-		continue; // continue for another string
-	}
-	else if (p[0] == 'R' && p[1] == '"')
+	tabcol += vts[t];
+	if (tabcol > col)
 	{
-	    // Raw string: R"[delim](...)[delim]"
-	    char_u *delim = p + 2;
-	    char_u *paren = vim_strchr(delim, '(');
-
-	    if (paren != NULL)
-	    {
-		size_t delim_len = paren - delim;
-
-		for (p += 3; *p; ++p)
-		    if (p[0] == ')' && STRNCMP(p + 1, delim, delim_len) == 0
-			    && p[delim_len + 1] == '"')
-		    {
-			p += delim_len + 1;
-			break;
-		    }
-		if (p[0] == '"')
-		    continue; // continue for another string
-	    }
+	    padding = (int)(tabcol - col);
+	    break;
 	}
-	break;				    // no string found
     }
-    if (!*p)
-	--p;				    // backup from NUL
-    return p;
-}
-#endif // FEAT_CINDENT || FEAT_SYN_HL
+    if (t > tabcount)
+	padding = vts[tabcount] - (int)((col - tabcol) % vts[tabcount]);
 
-#if defined(FEAT_CINDENT) || defined(PROTO)
+    return padding;
+}
 
 /*
- * Return TRUE if C-indenting is on.
+ * Find the size of the tab that covers a particular column.
  */
     int
-cindent_on(void)
+tabstop_at(colnr_T col, int ts, int *vts)
 {
-    return (!p_paste && (curbuf->b_p_cin
-# ifdef FEAT_EVAL
-		    || *curbuf->b_p_inde != NUL
-# endif
-		    ));
-}
-
-// Find result cache for cpp_baseclass
-typedef struct {
-    int	    found;
-    lpos_T  lpos;
-} cpp_baseclass_cache_T;
-
-/*
- * Functions for C-indenting.
- * Most of this originally comes from Eric Fischer.
- */
-/*
- * Below "XXX" means that this function may unlock the current line.
- */
+    int		tabcount;
+    colnr_T	tabcol = 0;
+    int		t;
+    int		tab_size = 0;
 
-static int	cin_isdefault(char_u *);
-static int	cin_ispreproc(char_u *);
-static int	cin_iscomment(char_u *);
-static int	cin_islinecomment(char_u *);
-static int	cin_isterminated(char_u *, int, int);
-static int	cin_iselse(char_u *);
-static int	cin_ends_in(char_u *, char_u *, char_u *);
-static int	cin_starts_with(char_u *s, char *word);
-static pos_T	*find_match_paren(int);
-static pos_T	*find_match_char(int c, int ind_maxparen);
-static int	find_last_paren(char_u *l, int start, int end);
-static int	find_match(int lookfor, linenr_T ourscope);
+    if (vts == 0 || vts[0] == 0)
+	return ts;
 
-/*
- * Skip over white space and C comments within the line.
- * Also skip over Perl/shell comments if desired.
- */
-    static char_u *
-cin_skipcomment(char_u *s)
-{
-    while (*s)
+    tabcount = vts[0];
+    for (t = 1; t <= tabcount; ++t)
     {
-	char_u *prev_s = s;
-
-	s = skipwhite(s);
-
-	// Perl/shell # comment comment continues until eol.  Require a space
-	// before # to avoid recognizing $#array.
-	if (curbuf->b_ind_hash_comment != 0 && s != prev_s && *s == '#')
-	{
-	    s += STRLEN(s);
-	    break;
-	}
-	if (*s != '/')
-	    break;
-	++s;
-	if (*s == '/')		// slash-slash comment continues till eol
+	tabcol += vts[t];
+	if (tabcol > col)
 	{
-	    s += STRLEN(s);
+	    tab_size = vts[t];
 	    break;
 	}
-	if (*s != '*')
-	    break;
-	for (++s; *s; ++s)	// skip slash-star comment
-	    if (s[0] == '*' && s[1] == '/')
-	    {
-		s += 2;
-		break;
-	    }
     }
-    return s;
-}
+    if (t > tabcount)
+	tab_size = vts[tabcount];
 
-/*
- * Return TRUE if there is no code at *s.  White space and comments are
- * not considered code.
- */
-    static int
-cin_nocode(char_u *s)
-{
-    return *cin_skipcomment(s) == NUL;
+    return tab_size;
 }
 
 /*
- * Check previous lines for a "//" line comment, skipping over blank lines.
+ * Find the column on which a tab starts.
  */
-    static pos_T *
-find_line_comment(void) // XXX
+    colnr_T
+tabstop_start(colnr_T col, int ts, int *vts)
 {
-    static pos_T pos;
-    char_u	 *line;
-    char_u	 *p;
-
-    pos = curwin->w_cursor;
-    while (--pos.lnum > 0)
-    {
-	line = ml_get(pos.lnum);
-	p = skipwhite(line);
-	if (cin_islinecomment(p))
-	{
-	    pos.col = (int)(p - line);
-	    return &pos;
-	}
-	if (*p != NUL)
-	    break;
-    }
-    return NULL;
-}
+    int		tabcount;
+    colnr_T	tabcol = 0;
+    int		t;
+    int         excess;
 
-/*
- * Return TRUE if "text" starts with "key:".
- */
-    static int
-cin_has_js_key(char_u *text)
-{
-    char_u *s = skipwhite(text);
-    int	    quote = -1;
+    if (vts == NULL || vts[0] == 0)
+	return (col / ts) * ts;
 
-    if (*s == '\'' || *s == '"')
+    tabcount = vts[0];
+    for (t = 1; t <= tabcount; ++t)
     {
-	// can be 'key': or "key":
-	quote = *s;
-	++s;
+	tabcol += vts[t];
+	if (tabcol > col)
+	    return tabcol - vts[t];
     }
-    if (!vim_isIDc(*s))	    // need at least one ID character
-	return FALSE;
-
-    while (vim_isIDc(*s))
-	++s;
-    if (*s == quote)
-	++s;
-
-    s = cin_skipcomment(s);
 
-    // "::" is not a label, it's C++
-    return (*s == ':' && s[1] != ':');
+    excess = tabcol % vts[tabcount];
+    return excess + ((col - excess) / vts[tabcount]) * vts[tabcount];
 }
 
 /*
- * Check if string matches "label:"; move to character after ':' if true.
- * "*s" must point to the start of the label, if there is one.
+ * Find the number of tabs and spaces necessary to get from one column
+ * to another.
  */
-    static int
-cin_islabel_skip(char_u **s)
+    void
+tabstop_fromto(
+	colnr_T start_col,
+	colnr_T end_col,
+	int	ts_arg,
+	int	*vts,
+	int	*ntabs,
+	int	*nspcs)
 {
-    if (!vim_isIDc(**s))	    // need at least one ID character
-	return FALSE;
-
-    while (vim_isIDc(**s))
-	(*s)++;
-
-    *s = cin_skipcomment(*s);
-
-    // "::" is not a label, it's C++
-    return (**s == ':' && *++*s != ':');
-}
+    int		spaces = end_col - start_col;
+    colnr_T	tabcol = 0;
+    int		padding = 0;
+    int		tabcount;
+    int		t;
+    int		ts = ts_arg == 0 ? curbuf->b_p_ts : ts_arg;
 
-/*
- * Recognize a label: "label:".
- * Note: curwin->w_cursor must be where we are looking for the label.
- */
-    static int
-cin_islabel(void)		// XXX
-{
-    char_u	*s;
+    if (vts == NULL || vts[0] == 0)
+    {
+	int tabs = 0;
+	int initspc = 0;
 
-    s = cin_skipcomment(ml_get_curline());
+	initspc = ts - (start_col % ts);
+	if (spaces >= initspc)
+	{
+	    spaces -= initspc;
+	    tabs++;
+	}
+	tabs += spaces / ts;
+	spaces -= (spaces / ts) * ts;
 
-    // Exclude "default" from labels, since it should be indented
-    // like a switch label.  Same for C++ scope declarations.
-    if (cin_isdefault(s))
-	return FALSE;
-    if (cin_isscopedecl(s))
-	return FALSE;
+	*ntabs = tabs;
+	*nspcs = spaces;
+	return;
+    }
 
-    if (cin_islabel_skip(&s))
+    // Find the padding needed to reach the next tabstop.
+    tabcount = vts[0];
+    for (t = 1; t <= tabcount; ++t)
     {
-	// Only accept a label if the previous line is terminated or is a case
-	// label.
-	pos_T	cursor_save;
-	pos_T	*trypos;
-	char_u	*line;
-
-	cursor_save = curwin->w_cursor;
-	while (curwin->w_cursor.lnum > 1)
+	tabcol += vts[t];
+	if (tabcol > start_col)
 	{
-	    --curwin->w_cursor.lnum;
+	    padding = (int)(tabcol - start_col);
+	    break;
+	}
+    }
+    if (t > tabcount)
+	padding = vts[tabcount] - (int)((start_col - tabcol) % vts[tabcount]);
 
-	    // If we're in a comment or raw string now, skip to the start of
-	    // it.
-	    curwin->w_cursor.col = 0;
-	    if ((trypos = ind_find_start_CORS(NULL)) != NULL) // XXX
-		curwin->w_cursor = *trypos;
+    // If the space needed is less than the padding no tabs can be used.
+    if (spaces < padding)
+    {
+	*ntabs = 0;
+	*nspcs = spaces;
+	return;
+    }
 
-	    line = ml_get_curline();
-	    if (cin_ispreproc(line))	// ignore #defines, #if, etc.
-		continue;
-	    if (*(line = cin_skipcomment(line)) == NUL)
-		continue;
+    *ntabs = 1;
+    spaces -= padding;
 
-	    curwin->w_cursor = cursor_save;
-	    if (cin_isterminated(line, TRUE, FALSE)
-		    || cin_isscopedecl(line)
-		    || cin_iscase(line, TRUE)
-		    || (cin_islabel_skip(&line) && cin_nocode(line)))
-		return TRUE;
-	    return FALSE;
+    // At least one tab has been used. See if any more will fit.
+    while (spaces != 0 && ++t <= tabcount)
+    {
+	padding = vts[t];
+	if (spaces < padding)
+	{
+	    *nspcs = spaces;
+	    return;
 	}
-	curwin->w_cursor = cursor_save;
-	return TRUE;		// label at start of file???
+	++*ntabs;
+	spaces -= padding;
     }
-    return FALSE;
+
+    *ntabs += spaces / vts[tabcount];
+    *nspcs =  spaces % vts[tabcount];
 }
 
 /*
- * Recognize structure initialization and enumerations:
- * "[typedef] [static|public|protected|private] enum"
- * "[typedef] [static|public|protected|private] = {"
+ * See if two tabstop arrays contain the same values.
  */
     static int
-cin_isinit(void)
+tabstop_eq(int *ts1, int *ts2)
 {
-    char_u	*s;
-    static char *skip[] = {"static", "public", "protected", "private"};
-
-    s = cin_skipcomment(ml_get_curline());
-
-    if (cin_starts_with(s, "typedef"))
-	s = cin_skipcomment(s + 7);
-
-    for (;;)
-    {
-	int i, l;
-
-	for (i = 0; i < (int)(sizeof(skip) / sizeof(char *)); ++i)
-	{
-	    l = (int)strlen(skip[i]);
-	    if (cin_starts_with(s, skip[i]))
-	    {
-		s = cin_skipcomment(s + l);
-		l = 0;
-		break;
-	    }
-	}
-	if (l != 0)
-	    break;
-    }
+    int		t;
 
-    if (cin_starts_with(s, "enum"))
+    if ((ts1 == 0 && ts2) || (ts1 && ts2 == 0))
+	return FALSE;
+    if (ts1 == ts2)
 	return TRUE;
+    if (ts1[0] != ts2[0])
+	return FALSE;
 
-    if (cin_ends_in(s, (char_u *)"=", (char_u *)"{"))
-	return TRUE;
+    for (t = 1; t <= ts1[0]; ++t)
+	if (ts1[t] != ts2[t])
+	    return FALSE;
 
-    return FALSE;
+    return TRUE;
 }
 
+# if defined(FEAT_BEVAL) || defined(PROTO)
 /*
- * Recognize a switch label: "case .*:" or "default:".
+ * Copy a tabstop array, allocating space for the new array.
  */
-     static int
-cin_iscase(
-    char_u *s,
-    int strict) // Allow relaxed check of case statement for JS
+    int *
+tabstop_copy(int *oldts)
 {
-    s = cin_skipcomment(s);
-    if (cin_starts_with(s, "case"))
-    {
-	for (s += 4; *s; ++s)
-	{
-	    s = cin_skipcomment(s);
-	    if (*s == ':')
-	    {
-		if (s[1] == ':')	// skip over "::" for C++
-		    ++s;
-		else
-		    return TRUE;
-	    }
-	    if (*s == '\'' && s[1] && s[2] == '\'')
-		s += 2;			// skip over ':'
-	    else if (*s == '/' && (s[1] == '*' || s[1] == '/'))
-		return FALSE;		// stop at comment
-	    else if (*s == '"')
-	    {
-		// JS etc.
-		if (strict)
-		    return FALSE;		// stop at string
-		else
-		    return TRUE;
-	    }
-	}
-	return FALSE;
-    }
+    int		*newts;
+    int		t;
 
-    if (cin_isdefault(s))
-	return TRUE;
-    return FALSE;
+    if (oldts == NULL)
+	return NULL;
+    newts = ALLOC_MULT(int, oldts[0] + 1);
+    if (newts != NULL)
+	for (t = 0; t <= oldts[0]; ++t)
+	    newts[t] = oldts[t];
+    return newts;
 }
+# endif
 
 /*
- * Recognize a "default" switch label.
+ * Return a count of the number of tabstops.
  */
-    static int
-cin_isdefault(char_u *s)
+    int
+tabstop_count(int *ts)
 {
-    return (STRNCMP(s, "default", 7) == 0
-	    && *(s = cin_skipcomment(s + 7)) == ':'
-	    && s[1] != ':');
+    return ts != NULL ? ts[0] : 0;
 }
 
 /*
- * Recognize a "public/private/protected" scope declaration label.
+ * Return the first tabstop, or 8 if there are no tabstops defined.
  */
-    static int
-cin_isscopedecl(char_u *s)
+    int
+tabstop_first(int *ts)
 {
-    int		i;
-
-    s = cin_skipcomment(s);
-    if (STRNCMP(s, "public", 6) == 0)
-	i = 6;
-    else if (STRNCMP(s, "protected", 9) == 0)
-	i = 9;
-    else if (STRNCMP(s, "private", 7) == 0)
-	i = 7;
-    else
-	return FALSE;
-    return (*(s = cin_skipcomment(s + i)) == ':' && s[1] != ':');
+    return ts != NULL ? ts[1] : 8;
 }
 
-// Maximum number of lines to search back for a "namespace" line.
-#define FIND_NAMESPACE_LIM 20
+#endif
 
 /*
- * Recognize a "namespace" scope declaration.
+ * Return the effective shiftwidth value for current buffer, using the
+ * 'tabstop' value when 'shiftwidth' is zero.
  */
-    static int
-cin_is_cpp_namespace(char_u *s)
+    long
+get_sw_value(buf_T *buf)
 {
-    char_u	*p;
-    int		has_name = FALSE;
-    int		has_name_start = FALSE;
-
-    s = cin_skipcomment(s);
-    if (STRNCMP(s, "namespace", 9) == 0 && (s[9] == NUL || !vim_iswordc(s[9])))
-    {
-	p = cin_skipcomment(skipwhite(s + 9));
-	while (*p != NUL)
-	{
-	    if (VIM_ISWHITE(*p))
-	    {
-		has_name = TRUE; // found end of a name
-		p = cin_skipcomment(skipwhite(p));
-	    }
-	    else if (*p == '{')
-	    {
-		break;
-	    }
-	    else if (vim_iswordc(*p))
-	    {
-		has_name_start = TRUE;
-		if (has_name)
-		    return FALSE; // word character after skipping past name
-		++p;
-	    }
-	    else if (p[0] == ':' && p[1] == ':' && vim_iswordc(p[2]))
-	    {
-		if (!has_name_start || has_name)
-		    return FALSE;
-		// C++ 17 nested namespace
-		p += 3;
-	    }
-	    else
-	    {
-		return FALSE;
-	    }
-	}
-	return TRUE;
-    }
-    return FALSE;
+    return get_sw_value_col(buf, 0);
 }
 
 /*
- * Recognize a `extern "C"` or `extern "C++"` linkage specifications.
+ * Idem, using "pos".
  */
-    static int
-cin_is_cpp_extern_c(char_u *s)
+    static long
+get_sw_value_pos(buf_T *buf, pos_T *pos)
 {
-    char_u	*p;
-    int		has_string_literal = FALSE;
+    pos_T save_cursor = curwin->w_cursor;
+    long sw_value;
 
-    s = cin_skipcomment(s);
-    if (STRNCMP(s, "extern", 6) == 0 && (s[6] == NUL || !vim_iswordc(s[6])))
-    {
-	p = cin_skipcomment(skipwhite(s + 6));
-	while (*p != NUL)
-	{
-	    if (VIM_ISWHITE(*p))
-	    {
-		p = cin_skipcomment(skipwhite(p));
-	    }
-	    else if (*p == '{')
-	    {
-		break;
-	    }
-	    else if (p[0] == '"' && p[1] == 'C' && p[2] == '"')
-	    {
-		if (has_string_literal)
-		    return FALSE;
-		has_string_literal = TRUE;
-		p += 3;
-	    }
-	    else if (p[0] == '"' && p[1] == 'C' && p[2] == '+' && p[3] == '+'
-		    && p[4] == '"')
-	    {
-		if (has_string_literal)
-		    return FALSE;
-		has_string_literal = TRUE;
-		p += 5;
-	    }
-	    else
-	    {
-		return FALSE;
-	    }
-	}
-	return has_string_literal ? TRUE : FALSE;
-    }
-    return FALSE;
+    curwin->w_cursor = *pos;
+    sw_value = get_sw_value_col(buf, get_nolist_virtcol());
+    curwin->w_cursor = save_cursor;
+    return sw_value;
 }
 
 /*
- * Return a pointer to the first non-empty non-comment character after a ':'.
- * Return NULL if not found.
- *	  case 234:    a = b;
- *		       ^
+ * Idem, using the first non-black in the current line.
  */
-    static char_u *
-after_label(char_u *l)
+    long
+get_sw_value_indent(buf_T *buf)
 {
-    for ( ; *l; ++l)
-    {
-	if (*l == ':')
-	{
-	    if (l[1] == ':')	    // skip over "::" for C++
-		++l;
-	    else if (!cin_iscase(l + 1, FALSE))
-		break;
-	}
-	else if (*l == '\'' && l[1] && l[2] == '\'')
-	    l += 2;		    // skip over 'x'
-    }
-    if (*l == NUL)
-	return NULL;
-    l = cin_skipcomment(l + 1);
-    if (*l == NUL)
-	return NULL;
-    return l;
+    pos_T pos = curwin->w_cursor;
+
+    pos.col = getwhitecols_curline();
+    return get_sw_value_pos(buf, &pos);
 }
 
 /*
- * Get indent of line "lnum", skipping a label.
- * Return 0 if there is nothing after the label.
+ * Idem, using virtual column "col".
  */
-    static int
-get_indent_nolabel (linenr_T lnum)	// XXX
+    long
+get_sw_value_col(buf_T *buf, colnr_T col UNUSED)
 {
-    char_u	*l;
-    pos_T	fp;
-    colnr_T	col;
-    char_u	*p;
-
-    l = ml_get(lnum);
-    p = after_label(l);
-    if (p == NULL)
-	return 0;
-
-    fp.col = (colnr_T)(p - l);
-    fp.lnum = lnum;
-    getvcol(curwin, &fp, &col, NULL, NULL);
-    return (int)col;
+    return buf->b_p_sw ? buf->b_p_sw :
+#ifdef FEAT_VARTABS
+	tabstop_at(col, buf->b_p_ts, buf->b_p_vts_array);
+#else
+	buf->b_p_ts;
+#endif
 }
 
 /*
- * Find indent for line "lnum", ignoring any case or jump label.
- * Also return a pointer to the text (after the label) in "pp".
- *   label:	if (asdf && asdfasdf)
- *		^
+ * Return the effective softtabstop value for the current buffer, using the
+ * 'shiftwidth' value when 'softtabstop' is negative.
  */
-    static int
-skip_label(linenr_T lnum, char_u **pp)
+    long
+get_sts_value(void)
 {
-    char_u	*l;
-    int		amount;
-    pos_T	cursor_save;
-
-    cursor_save = curwin->w_cursor;
-    curwin->w_cursor.lnum = lnum;
-    l = ml_get_curline();
-				    // XXX
-    if (cin_iscase(l, FALSE) || cin_isscopedecl(l) || cin_islabel())
-    {
-	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;
+    return curbuf->b_p_sts < 0 ? get_sw_value(curbuf) : curbuf->b_p_sts;
 }
 
 /*
- * Return the indent of the first variable name after a type in a declaration.
- *  int	    a,			indent of "a"
- *  static struct foo    b,	indent of "b"
- *  enum bla    c,		indent of "c"
- * Returns zero when it doesn't look like a declaration.
+ * Count the size (in window cells) of the indent in the current line.
  */
-    static int
-cin_first_id_amount(void)
+    int
+get_indent(void)
 {
-    char_u	*line, *p, *s;
-    int		len;
-    pos_T	fp;
-    colnr_T	col;
-
-    line = ml_get_curline();
-    p = skipwhite(line);
-    len = (int)(skiptowhite(p) - p);
-    if (len == 6 && STRNCMP(p, "static", 6) == 0)
-    {
-	p = skipwhite(p + 6);
-	len = (int)(skiptowhite(p) - p);
-    }
-    if (len == 6 && STRNCMP(p, "struct", 6) == 0)
-	p = skipwhite(p + 6);
-    else if (len == 4 && STRNCMP(p, "enum", 4) == 0)
-	p = skipwhite(p + 4);
-    else if ((len == 8 && STRNCMP(p, "unsigned", 8) == 0)
-	    || (len == 6 && STRNCMP(p, "signed", 6) == 0))
-    {
-	s = skipwhite(p + len);
-	if ((STRNCMP(s, "int", 3) == 0 && VIM_ISWHITE(s[3]))
-		|| (STRNCMP(s, "long", 4) == 0 && VIM_ISWHITE(s[4]))
-		|| (STRNCMP(s, "short", 5) == 0 && VIM_ISWHITE(s[5]))
-		|| (STRNCMP(s, "char", 4) == 0 && VIM_ISWHITE(s[4])))
-	    p = s;
-    }
-    for (len = 0; vim_isIDc(p[len]); ++len)
-	;
-    if (len == 0 || !VIM_ISWHITE(p[len]) || cin_nocode(p))
-	return 0;
-
-    p = skipwhite(p + len);
-    fp.lnum = curwin->w_cursor.lnum;
-    fp.col = (colnr_T)(p - line);
-    getvcol(curwin, &fp, &col, NULL, NULL);
-    return (int)col;
+#ifdef FEAT_VARTABS
+    return get_indent_str_vtab(ml_get_curline(), (int)curbuf->b_p_ts,
+						 curbuf->b_p_vts_array, FALSE);
+#else
+    return get_indent_str(ml_get_curline(), (int)curbuf->b_p_ts, FALSE);
+#endif
 }
 
 /*
- * Return the indent of the first non-blank after an equal sign.
- *       char *foo = "here";
- * Return zero if no (useful) equal sign found.
- * Return -1 if the line above "lnum" ends in a backslash.
- *      foo = "asdf\
- *	       asdf\
- *	       here";
+ * Count the size (in window cells) of the indent in line "lnum".
  */
-    static int
-cin_get_equal_amount(linenr_T lnum)
+    int
+get_indent_lnum(linenr_T lnum)
 {
-    char_u	*line;
-    char_u	*s;
-    colnr_T	col;
-    pos_T	fp;
-
-    if (lnum > 1)
-    {
-	line = ml_get(lnum - 1);
-	if (*line != NUL && line[STRLEN(line) - 1] == '\\')
-	    return -1;
-    }
-
-    line = s = ml_get(lnum);
-    while (*s != NUL && vim_strchr((char_u *)"=;{}\"'", *s) == NULL)
-    {
-	if (cin_iscomment(s))	// ignore comments
-	    s = cin_skipcomment(s);
-	else
-	    ++s;
-    }
-    if (*s != '=')
-	return 0;
-
-    s = skipwhite(s + 1);
-    if (cin_nocode(s))
-	return 0;
-
-    if (*s == '"')	// nice alignment for continued strings
-	++s;
-
-    fp.lnum = lnum;
-    fp.col = (colnr_T)(s - line);
-    getvcol(curwin, &fp, &col, NULL, NULL);
-    return (int)col;
+#ifdef FEAT_VARTABS
+    return get_indent_str_vtab(ml_get(lnum), (int)curbuf->b_p_ts,
+						 curbuf->b_p_vts_array, FALSE);
+#else
+    return get_indent_str(ml_get(lnum), (int)curbuf->b_p_ts, FALSE);
+#endif
 }
 
+#if defined(FEAT_FOLDING) || defined(PROTO)
 /*
- * Recognize a preprocessor statement: Any line that starts with '#'.
+ * Count the size (in window cells) of the indent in line "lnum" of buffer
+ * "buf".
  */
-    static int
-cin_ispreproc(char_u *s)
+    int
+get_indent_buf(buf_T *buf, linenr_T lnum)
 {
-    if (*skipwhite(s) == '#')
-	return TRUE;
-    return FALSE;
+# ifdef FEAT_VARTABS
+    return get_indent_str_vtab(ml_get_buf(buf, lnum, FALSE),
+			       (int)curbuf->b_p_ts, buf->b_p_vts_array, FALSE);
+# else
+    return get_indent_str(ml_get_buf(buf, lnum, FALSE), (int)buf->b_p_ts, FALSE);
+# endif
 }
+#endif
 
 /*
- * Return TRUE if line "*pp" at "*lnump" is a preprocessor statement or a
- * continuation line of a preprocessor statement.  Decrease "*lnump" to the
- * start and return the line in "*pp".
- * Put the amount of indent in "*amount".
+ * count the size (in window cells) of the indent in line "ptr", with
+ * 'tabstop' at "ts"
  */
-    static int
-cin_ispreproc_cont(char_u **pp, linenr_T *lnump, int *amount)
+    int
+get_indent_str(
+    char_u	*ptr,
+    int		ts,
+    int		list) // if TRUE, count only screen size for tabs
 {
-    char_u	*line = *pp;
-    linenr_T	lnum = *lnump;
-    int		retval = FALSE;
-    int		candidate_amount = *amount;
-
-    if (*line != NUL && line[STRLEN(line) - 1] == '\\')
-	candidate_amount = get_indent_lnum(lnum);
+    int		count = 0;
 
-    for (;;)
+    for ( ; *ptr; ++ptr)
     {
-	if (cin_ispreproc(line))
+	if (*ptr == TAB)
 	{
-	    retval = TRUE;
-	    *lnump = lnum;
-	    break;
+	    if (!list || lcs_tab1)    // count a tab for what it is worth
+		count += ts - (count % ts);
+	    else
+		// In list mode, when tab is not set, count screen char width
+		// for Tab, displays: ^I
+		count += ptr2cells(ptr);
 	}
-	if (lnum == 1)
-	    break;
-	line = ml_get(--lnum);
-	if (*line == NUL || line[STRLEN(line) - 1] != '\\')
+	else if (*ptr == ' ')
+	    ++count;		// count a space for one
+	else
 	    break;
     }
-
-    if (lnum != *lnump)
-	*pp = ml_get(*lnump);
-    if (retval)
-	*amount = candidate_amount;
-    return retval;
+    return count;
 }
 
+#ifdef FEAT_VARTABS
 /*
- * Recognize the start of a C or C++ comment.
+ * Count the size (in window cells) of the indent in line "ptr", using
+ * variable tabstops.
+ * if "list" is TRUE, count only screen size for tabs.
  */
-    static int
-cin_iscomment(char_u *p)
-{
-    return (p[0] == '/' && (p[1] == '*' || p[1] == '/'));
-}
-
-/*
- * Recognize the start of a "//" comment.
- */
-    static int
-cin_islinecomment(char_u *p)
-{
-    return (p[0] == '/' && p[1] == '/');
-}
-
-/*
- * Recognize a line that starts with '{' or '}', or ends with ';', ',', '{' or
- * '}'.
- * Don't consider "} else" a terminated line.
- * If a line begins with an "else", only consider it terminated if no unmatched
- * opening braces follow (handle "else { foo();" correctly).
- * Return the character terminating the line (ending char's have precedence if
- * both apply in order to determine initializations).
- */
-    static int
-cin_isterminated(
-    char_u	*s,
-    int		incl_open,	// include '{' at the end as terminator
-    int		incl_comma)	// recognize a trailing comma
+    int
+get_indent_str_vtab(char_u *ptr, int ts, int *vts, int list)
 {
-    char_u	found_start = 0;
-    unsigned	n_open = 0;
-    int		is_else = FALSE;
-
-    s = cin_skipcomment(s);
+    int		count = 0;
 
-    if (*s == '{' || (*s == '}' && !cin_iselse(s)))
-	found_start = *s;
-
-    if (!found_start)
-	is_else = cin_iselse(s);
-
-    while (*s)
+    for ( ; *ptr; ++ptr)
     {
-	// skip over comments, "" strings and 'c'haracters
-	s = skip_string(cin_skipcomment(s));
-	if (*s == '}' && n_open > 0)
-	    --n_open;
-	if ((!is_else || n_open == 0)
-		&& (*s == ';' || *s == '}' || (incl_comma && *s == ','))
-		&& cin_nocode(s + 1))
-	    return *s;
-	else if (*s == '{')
+	if (*ptr == TAB)    // count a tab for what it is worth
 	{
-	    if (incl_open && cin_nocode(s + 1))
-		return *s;
+	    if (!list || lcs_tab1)
+		count += tabstop_padding(count, ts, vts);
 	    else
-		++n_open;
+		// In list mode, when tab is not set, count screen char width
+		// for Tab, displays: ^I
+		count += ptr2cells(ptr);
 	}
-
-	if (*s)
-	    s++;
+	else if (*ptr == ' ')
+	    ++count;		// count a space for one
+	else
+	    break;
     }
-    return found_start;
+    return count;
 }
+#endif
 
 /*
- * 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.
- * When a line ends in a comma we continue looking in the next line.
- * "sp" points to a string with the line.  When looking at other lines it must
- * be restored to the line.  When it's NULL fetch lines here.
- * "first_lnum" is where we start looking.
- * "min_lnum" is the line before which we will not be looking.
+ * Set the indent of the current line.
+ * Leaves the cursor on the first non-blank in the line.
+ * Caller must take care of undo.
+ * "flags":
+ *	SIN_CHANGED:	call changed_bytes() if the line was changed.
+ *	SIN_INSERT:	insert the indent in front of the line.
+ *	SIN_UNDO:	save line for undo before changing it.
+ * Returns TRUE if the line was changed.
  */
-    static int
-cin_isfuncdecl(
-    char_u	**sp,
-    linenr_T	first_lnum,
-    linenr_T	min_lnum)
+    int
+set_indent(
+    int		size,		    // measured in spaces
+    int		flags)
 {
+    char_u	*p;
+    char_u	*newline;
+    char_u	*oldline;
     char_u	*s;
-    linenr_T	lnum = first_lnum;
-    linenr_T	save_lnum = curwin->w_cursor.lnum;
+    int		todo;
+    int		ind_len;	    // measured in characters
+    int		line_len;
+    int		doit = FALSE;
+    int		ind_done = 0;	    // measured in spaces
+#ifdef FEAT_VARTABS
+    int		ind_col = 0;
+#endif
+    int		tab_pad;
     int		retval = FALSE;
-    pos_T	*trypos;
-    int		just_started = TRUE;
+    int		orig_char_len = -1; // number of initial whitespace chars when
+				    // 'et' and 'pi' are both set
 
-    if (sp == NULL)
-	s = ml_get(lnum);
-    else
-	s = *sp;
+    // First check if there is anything to do and compute the number of
+    // characters needed for the indent.
+    todo = size;
+    ind_len = 0;
+    p = oldline = ml_get_curline();
+
+    // Calculate the buffer size for the new indent, and check to see if it
+    // isn't already set
 
-    curwin->w_cursor.lnum = lnum;
-    if (find_last_paren(s, '(', ')')
-	&& (trypos = find_match_paren(curbuf->b_ind_maxparen)) != NULL)
+    // if 'expandtab' isn't set: use TABs; if both 'expandtab' and
+    // 'preserveindent' are set count the number of characters at the
+    // beginning of the line to be copied
+    if (!curbuf->b_p_et || (!(flags & SIN_INSERT) && curbuf->b_p_pi))
     {
-	lnum = trypos->lnum;
-	if (lnum < min_lnum)
+	// If 'preserveindent' is set then reuse as much as possible of
+	// the existing indent structure for the new indent
+	if (!(flags & SIN_INSERT) && curbuf->b_p_pi)
 	{
-	    curwin->w_cursor.lnum = save_lnum;
-	    return FALSE;
-	}
+	    ind_done = 0;
 
-	s = ml_get(lnum);
-    }
-    curwin->w_cursor.lnum = save_lnum;
-
-    // Ignore line starting with #.
-    if (cin_ispreproc(s))
-	return FALSE;
+	    // count as many characters as we can use
+	    while (todo > 0 && VIM_ISWHITE(*p))
+	    {
+		if (*p == TAB)
+		{
+#ifdef FEAT_VARTABS
+		    tab_pad = tabstop_padding(ind_done, curbuf->b_p_ts,
+							curbuf->b_p_vts_array);
+#else
+		    tab_pad = (int)curbuf->b_p_ts
+					   - (ind_done % (int)curbuf->b_p_ts);
+#endif
+		    // stop if this tab will overshoot the target
+		    if (todo < tab_pad)
+			break;
+		    todo -= tab_pad;
+		    ++ind_len;
+		    ind_done += tab_pad;
+		}
+		else
+		{
+		    --todo;
+		    ++ind_len;
+		    ++ind_done;
+		}
+		++p;
+	    }
 
-    while (*s && *s != '(' && *s != ';' && *s != '\'' && *s != '"')
-    {
-	if (cin_iscomment(s))	// ignore comments
-	    s = cin_skipcomment(s);
-	else if (*s == ':')
-	{
-	    if (*(s + 1) == ':')
-		s += 2;
-	    else
-		// To avoid a mistake in the following situation:
-		// A::A(int a, int b)
-		//     : a(0)  // <--not a function decl
-		//     , b(0)
-		// {...
-		return FALSE;
+#ifdef FEAT_VARTABS
+	    // These diverge from this point.
+	    ind_col = ind_done;
+#endif
+	    // Set initial number of whitespace chars to copy if we are
+	    // preserving indent but expandtab is set
+	    if (curbuf->b_p_et)
+		orig_char_len = ind_len;
+
+	    // Fill to next tabstop with a tab, if possible
+#ifdef FEAT_VARTABS
+	    tab_pad = tabstop_padding(ind_done, curbuf->b_p_ts,
+						curbuf->b_p_vts_array);
+#else
+	    tab_pad = (int)curbuf->b_p_ts - (ind_done % (int)curbuf->b_p_ts);
+#endif
+	    if (todo >= tab_pad && orig_char_len == -1)
+	    {
+		doit = TRUE;
+		todo -= tab_pad;
+		++ind_len;
+		// ind_done += tab_pad;
+#ifdef FEAT_VARTABS
+		ind_col += tab_pad;
+#endif
+	    }
 	}
-	else
-	    ++s;
-    }
-    if (*s != '(')
-	return FALSE;		// ';', ' or "  before any () or no '('
 
-    while (*s && *s != ';' && *s != '\'' && *s != '"')
-    {
-	if (*s == ')' && cin_nocode(s + 1))
-	{
-	    /*
-	     * ')' at the end: may have found a match
-	     * Check for he previous line not to end in a backslash:
-	     *       #if defined(x) && \
-	     *		 defined(y)
-	     */
-	    lnum = first_lnum - 1;
-	    s = ml_get(lnum);
-	    if (*s == NUL || s[STRLEN(s) - 1] != '\\')
-		retval = TRUE;
-	    goto done;
-	}
-	if ((*s == ',' && cin_nocode(s + 1)) || s[1] == NUL || cin_nocode(s))
+	// count tabs required for indent
+#ifdef FEAT_VARTABS
+	for (;;)
 	{
-	    int comma = (*s == ',');
-
-	    // ',' at the end: continue looking in the next line.
-	    // At the end: check for ',' in the next line, for this style:
-	    // func(arg1
-	    //       , arg2)
-	    for (;;)
-	    {
-		if (lnum >= curbuf->b_ml.ml_line_count)
-		    break;
-		s = ml_get(++lnum);
-		if (!cin_ispreproc(s))
-		    break;
-	    }
-	    if (lnum >= curbuf->b_ml.ml_line_count)
-		break;
-	    // Require a comma at end of the line or a comma or ')' at the
-	    // start of next line.
-	    s = skipwhite(s);
-	    if (!just_started && (!comma && *s != ',' && *s != ')'))
+	    tab_pad = tabstop_padding(ind_col, curbuf->b_p_ts,
+							curbuf->b_p_vts_array);
+	    if (todo < tab_pad)
 		break;
-	    just_started = FALSE;
+	    if (*p != TAB)
+		doit = TRUE;
+	    else
+		++p;
+	    todo -= tab_pad;
+	    ++ind_len;
+	    ind_col += tab_pad;
 	}
-	else if (cin_iscomment(s))	// ignore comments
-	    s = cin_skipcomment(s);
-	else
+#else
+	while (todo >= (int)curbuf->b_p_ts)
 	{
-	    ++s;
-	    just_started = FALSE;
+	    if (*p != TAB)
+		doit = TRUE;
+	    else
+		++p;
+	    todo -= (int)curbuf->b_p_ts;
+	    ++ind_len;
+	    // ind_done += (int)curbuf->b_p_ts;
 	}
+#endif
     }
-
-done:
-    if (lnum != first_lnum && sp != NULL)
-	*sp = ml_get(first_lnum);
-
-    return retval;
-}
-
-    static int
-cin_isif(char_u *p)
-{
- return (STRNCMP(p, "if", 2) == 0 && !vim_isIDc(p[2]));
-}
-
-    static int
-cin_iselse(
-    char_u  *p)
-{
-    if (*p == '}')	    // accept "} else"
-	p = cin_skipcomment(p + 1);
-    return (STRNCMP(p, "else", 4) == 0 && !vim_isIDc(p[4]));
-}
-
-    static int
-cin_isdo(char_u *p)
-{
-    return (STRNCMP(p, "do", 2) == 0 && !vim_isIDc(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
-cin_iswhileofdo (char_u *p, linenr_T lnum)	// XXX
-{
-    pos_T	cursor_save;
-    pos_T	*trypos;
-    int		retval = FALSE;
-
-    p = cin_skipcomment(p);
-    if (*p == '}')		// accept "} while (cond);"
-	p = cin_skipcomment(p + 1);
-    if (cin_starts_with(p, "while"))
+    // count spaces required for indent
+    while (todo > 0)
     {
-	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"
-	{
+	if (*p != ' ')
+	    doit = TRUE;
+	else
 	    ++p;
-	    ++curwin->w_cursor.col;
-	}
-	if ((trypos = findmatchlimit(NULL, 0, 0,
-					      curbuf->b_ind_maxparen)) != NULL
-		&& *cin_skipcomment(ml_get_pos(trypos) + 1) == ';')
-	    retval = TRUE;
-	curwin->w_cursor = cursor_save;
+	--todo;
+	++ind_len;
+	// ++ind_done;
     }
-    return retval;
-}
-
-/*
- * Check whether in "p" there is an "if", "for" or "while" before "*poffset".
- * Return 0 if there is none.
- * Otherwise return !0 and update "*poffset" to point to the place where the
- * string was found.
- */
-    static int
-cin_is_if_for_while_before_offset(char_u *line, int *poffset)
-{
-    int offset = *poffset;
 
-    if (offset-- < 2)
-	return 0;
-    while (offset > 2 && VIM_ISWHITE(line[offset]))
-	--offset;
+    // Return if the indent is OK already.
+    if (!doit && !VIM_ISWHITE(*p) && !(flags & SIN_INSERT))
+	return FALSE;
 
-    offset -= 1;
-    if (!STRNCMP(line + offset, "if", 2))
-	goto probablyFound;
+    // Allocate memory for the new line.
+    if (flags & SIN_INSERT)
+	p = oldline;
+    else
+	p = skipwhite(p);
+    line_len = (int)STRLEN(p) + 1;
 
-    if (offset >= 1)
+    // If 'preserveindent' and 'expandtab' are both set keep the original
+    // characters and allocate accordingly.  We will fill the rest with spaces
+    // after the if (!curbuf->b_p_et) below.
+    if (orig_char_len != -1)
     {
-	offset -= 1;
-	if (!STRNCMP(line + offset, "for", 3))
-	    goto probablyFound;
-
-	if (offset >= 2)
+	newline = alloc(orig_char_len + size - ind_done + line_len);
+	if (newline == NULL)
+	    return FALSE;
+	todo = size - ind_done;
+	ind_len = orig_char_len + todo;    // Set total length of indent in
+					   // characters, which may have been
+					   // undercounted until now
+	p = oldline;
+	s = newline;
+	while (orig_char_len > 0)
 	{
-	    offset -= 2;
-	    if (!STRNCMP(line + offset, "while", 5))
-		goto probablyFound;
+	    *s++ = *p++;
+	    orig_char_len--;
 	}
-    }
-    return 0;
 
-probablyFound:
-    if (!offset || !vim_isIDc(line[offset - 1]))
+	// Skip over any additional white space (useful when newindent is less
+	// than old)
+	while (VIM_ISWHITE(*p))
+	    ++p;
+
+    }
+    else
     {
-	*poffset = offset;
-	return 1;
+	todo = size;
+	newline = alloc(ind_len + line_len);
+	if (newline == NULL)
+	    return FALSE;
+	s = newline;
     }
-    return 0;
-}
-
-/*
- * Return TRUE if we are at the end of a do-while.
- *    do
- *       nothing;
- *    while (foo
- *	       && bar);  <-- here
- * Adjust the cursor to the line with "while".
- */
-    static int
-cin_iswhileofdo_end(int terminated)
-{
-    char_u	*line;
-    char_u	*p;
-    char_u	*s;
-    pos_T	*trypos;
-    int		i;
-
-    if (terminated != ';')	// there must be a ';' at the end
-	return FALSE;
 
-    p = line = ml_get_curline();
-    while (*p != NUL)
+    // Put the characters in the new line.
+    // if 'expandtab' isn't set: use TABs
+    if (!curbuf->b_p_et)
     {
-	p = cin_skipcomment(p);
-	if (*p == ')')
+	// If 'preserveindent' is set then reuse as much as possible of
+	// the existing indent structure for the new indent
+	if (!(flags & SIN_INSERT) && curbuf->b_p_pi)
 	{
-	    s = skipwhite(p + 1);
-	    if (*s == ';' && cin_nocode(s + 1))
+	    p = oldline;
+	    ind_done = 0;
+
+	    while (todo > 0 && VIM_ISWHITE(*p))
 	    {
-		// Found ");" at end of the line, now check there is "while"
-		// before the matching '('.  XXX
-		i = (int)(p - line);
-		curwin->w_cursor.col = i;
-		trypos = find_match_paren(curbuf->b_ind_maxparen);
-		if (trypos != NULL)
+		if (*p == TAB)
 		{
-		    s = cin_skipcomment(ml_get(trypos->lnum));
-		    if (*s == '}')		// accept "} while (cond);"
-			s = cin_skipcomment(s + 1);
-		    if (cin_starts_with(s, "while"))
-		    {
-			curwin->w_cursor.lnum = trypos->lnum;
-			return TRUE;
-		    }
+#ifdef FEAT_VARTABS
+		    tab_pad = tabstop_padding(ind_done, curbuf->b_p_ts,
+							curbuf->b_p_vts_array);
+#else
+		    tab_pad = (int)curbuf->b_p_ts
+					   - (ind_done % (int)curbuf->b_p_ts);
+#endif
+		    // stop if this tab will overshoot the target
+		    if (todo < tab_pad)
+			break;
+		    todo -= tab_pad;
+		    ind_done += tab_pad;
 		}
-
-		// Searching may have made "line" invalid, get it again.
-		line = ml_get_curline();
-		p = line + i;
+		else
+		{
+		    --todo;
+		    ++ind_done;
+		}
+		*s++ = *p++;
 	    }
-	}
-	if (*p != NUL)
-	    ++p;
-    }
-    return FALSE;
-}
-
-    static int
-cin_isbreak(char_u *p)
-{
-    return (STRNCMP(p, "break", 5) == 0 && !vim_isIDc(p[5]));
-}
-
-/*
- * Find the position of a C++ base-class declaration or
- * constructor-initialization. eg:
- *
- * class MyClass :
- *	baseClass		<-- here
- * class MyClass : public baseClass,
- *	anotherBaseClass	<-- here (should probably lineup ??)
- * MyClass::MyClass(...) :
- *	baseClass(...)		<-- here (constructor-initialization)
- *
- * This is a lot of guessing.  Watch out for "cond ? func() : foo".
- */
-    static int
-cin_is_cpp_baseclass(
-    cpp_baseclass_cache_T *cached) // input and output
-{
-    lpos_T	*pos = &cached->lpos;	    // find position
-    char_u	*s;
-    int		class_or_struct, lookfor_ctor_init, cpp_base_class;
-    linenr_T	lnum = curwin->w_cursor.lnum;
-    char_u	*line = ml_get_curline();
-
-    if (pos->lnum <= lnum)
-	return cached->found;	// Use the cached result
-
-    pos->col = 0;
 
-    s = skipwhite(line);
-    if (*s == '#')		// skip #define FOO x ? (x) : x
-	return FALSE;
-    s = cin_skipcomment(s);
-    if (*s == NUL)
-	return FALSE;
+	    // Fill to next tabstop with a tab, if possible
+#ifdef FEAT_VARTABS
+	    tab_pad = tabstop_padding(ind_done, curbuf->b_p_ts,
+						curbuf->b_p_vts_array);
+#else
+	    tab_pad = (int)curbuf->b_p_ts - (ind_done % (int)curbuf->b_p_ts);
+#endif
+	    if (todo >= tab_pad)
+	    {
+		*s++ = TAB;
+		todo -= tab_pad;
+#ifdef FEAT_VARTABS
+		ind_done += tab_pad;
+#endif
+	    }
 
-    cpp_base_class = lookfor_ctor_init = class_or_struct = FALSE;
-
-    // Search for a line starting with '#', empty, ending in ';' or containing
-    // '{' or '}' and start below it.  This handles the following situations:
-    //	a = cond ?
-    //	      func() :
-    //		   asdf;
-    //	func::foo()
-    //	      : something
-    //	{}
-    //	Foo::Foo (int one, int two)
-    //		: something(4),
-    //		somethingelse(3)
-    //	{}
-    while (lnum > 1)
-    {
-	line = ml_get(lnum - 1);
-	s = skipwhite(line);
-	if (*s == '#' || *s == NUL)
-	    break;
-	while (*s != NUL)
-	{
-	    s = cin_skipcomment(s);
-	    if (*s == '{' || *s == '}'
-		    || (*s == ';' && cin_nocode(s + 1)))
-		break;
-	    if (*s != NUL)
-		++s;
+	    p = skipwhite(p);
 	}
-	if (*s != NUL)
-	    break;
-	--lnum;
-    }
 
-    pos->lnum = lnum;
-    line = ml_get(lnum);
-    s = line;
-    for (;;)
-    {
-	if (*s == NUL)
+#ifdef FEAT_VARTABS
+	for (;;)
 	{
-	    if (lnum == curwin->w_cursor.lnum)
+	    tab_pad = tabstop_padding(ind_done, curbuf->b_p_ts,
+							curbuf->b_p_vts_array);
+	    if (todo < tab_pad)
 		break;
-	    // Continue in the cursor line.
-	    line = ml_get(++lnum);
-	    s = line;
+	    *s++ = TAB;
+	    todo -= tab_pad;
+	    ind_done += tab_pad;
 	}
-	if (s == line)
+#else
+	while (todo >= (int)curbuf->b_p_ts)
 	{
-	    // don't recognize "case (foo):" as a baseclass
-	    if (cin_iscase(s, FALSE))
-		break;
-	    s = cin_skipcomment(line);
-	    if (*s == NUL)
-		continue;
+	    *s++ = TAB;
+	    todo -= (int)curbuf->b_p_ts;
 	}
+#endif
+    }
+    while (todo > 0)
+    {
+	*s++ = ' ';
+	--todo;
+    }
+    mch_memmove(s, p, (size_t)line_len);
 
-	if (s[0] == '"' || (s[0] == 'R' && s[1] == '"'))
-	    s = skip_string(s) + 1;
-	else if (s[0] == ':')
-	{
-	    if (s[1] == ':')
-	    {
-		// skip double colon. It can't be a constructor
-		// initialization any more
-		lookfor_ctor_init = FALSE;
-		s = cin_skipcomment(s + 2);
-	    }
-	    else if (lookfor_ctor_init || class_or_struct)
-	    {
-		// we have something found, that looks like the start of
-		// cpp-base-class-declaration or constructor-initialization
-		cpp_base_class = TRUE;
-		lookfor_ctor_init = class_or_struct = FALSE;
-		pos->col = 0;
-		s = cin_skipcomment(s + 1);
-	    }
-	    else
-		s = cin_skipcomment(s + 1);
-	}
-	else if ((STRNCMP(s, "class", 5) == 0 && !vim_isIDc(s[5]))
-		|| (STRNCMP(s, "struct", 6) == 0 && !vim_isIDc(s[6])))
-	{
-	    class_or_struct = TRUE;
-	    lookfor_ctor_init = FALSE;
+    // Replace the line (unless undo fails).
+    if (!(flags & SIN_UNDO) || u_savesub(curwin->w_cursor.lnum) == OK)
+    {
+	ml_replace(curwin->w_cursor.lnum, newline, FALSE);
+	if (flags & SIN_CHANGED)
+	    changed_bytes(curwin->w_cursor.lnum, 0);
 
-	    if (*s == 'c')
-		s = cin_skipcomment(s + 5);
-	    else
-		s = cin_skipcomment(s + 6);
+	// Correct saved cursor position if it is in this line.
+	if (saved_cursor.lnum == curwin->w_cursor.lnum)
+	{
+	    if (saved_cursor.col >= (colnr_T)(p - oldline))
+		// cursor was after the indent, adjust for the number of
+		// bytes added/removed
+		saved_cursor.col += ind_len - (colnr_T)(p - oldline);
+	    else if (saved_cursor.col >= (colnr_T)(s - newline))
+		// cursor was in the indent, and is now after it, put it back
+		// at the start of the indent (replacing spaces with TAB)
+		saved_cursor.col = (colnr_T)(s - newline);
 	}
-	else
+#ifdef FEAT_TEXT_PROP
 	{
-	    if (s[0] == '{' || s[0] == '}' || s[0] == ';')
-	    {
-		cpp_base_class = lookfor_ctor_init = class_or_struct = FALSE;
-	    }
-	    else if (s[0] == ')')
-	    {
-		// Constructor-initialization is assumed if we come across
-		// something like "):"
-		class_or_struct = FALSE;
-		lookfor_ctor_init = TRUE;
-	    }
-	    else if (s[0] == '?')
-	    {
-		// Avoid seeing '() :' after '?' as constructor init.
-		return FALSE;
-	    }
-	    else if (!vim_isIDc(s[0]))
-	    {
-		// if it is not an identifier, we are wrong
-		class_or_struct = FALSE;
-		lookfor_ctor_init = FALSE;
-	    }
-	    else if (pos->col == 0)
-	    {
-		// it can't be a constructor-initialization any more
-		lookfor_ctor_init = FALSE;
+	    int added = ind_len - (colnr_T)(p - oldline);
 
-		// the first statement starts here: lineup with this one...
-		if (cpp_base_class)
-		    pos->col = (colnr_T)(s - line);
-	    }
-
-	    // When the line ends in a comma don't align with it.
-	    if (lnum == curwin->w_cursor.lnum && *s == ',' && cin_nocode(s + 1))
-		pos->col = 0;
-
-	    s = cin_skipcomment(s + 1);
+	    // When increasing indent this behaves like spaces were inserted at
+	    // the old indent, when decreasing indent it behaves like spaces
+	    // were deleted at the new indent.
+	    adjust_prop_columns(curwin->w_cursor.lnum,
+		 (colnr_T)(added > 0 ? (p - oldline) : ind_len), added, 0);
 	}
-    }
-
-    cached->found = cpp_base_class;
-    if (cpp_base_class)
-	pos->lnum = lnum;
-    return cpp_base_class;
-}
-
-    static int
-get_baseclass_amount(int col)
-{
-    int		amount;
-    colnr_T	vcol;
-    pos_T	*trypos;
-
-    if (col == 0)
-    {
-	amount = get_indent();
-	if (find_last_paren(ml_get_curline(), '(', ')')
-		&& (trypos = find_match_paren(curbuf->b_ind_maxparen)) != NULL)
-	    amount = get_indent_lnum(trypos->lnum); // XXX
-	if (!cin_ends_in(ml_get_curline(), (char_u *)",", NULL))
-	    amount += curbuf->b_ind_cpp_baseclass;
+#endif
+	retval = TRUE;
     }
     else
-    {
-	curwin->w_cursor.col = col;
-	getvcol(curwin, &curwin->w_cursor, &vcol, NULL, NULL);
-	amount = (int)vcol;
-    }
-    if (amount < curbuf->b_ind_cpp_baseclass)
-	amount = curbuf->b_ind_cpp_baseclass;
-    return amount;
+	vim_free(newline);
+
+    curwin->w_cursor.col = ind_len;
+    return retval;
 }
 
 /*
- * Return TRUE if string "s" ends with the string "find", possibly followed by
- * white space and comments.  Skip strings and comments.
- * Ignore "ignore" after "find" if it's not NULL.
+ * Return the indent of the current line after a number.  Return -1 if no
+ * number was found.  Used for 'n' in 'formatoptions': numbered list.
+ * Since a pattern is used it can actually handle more than numbers.
  */
-    static int
-cin_ends_in(char_u *s, char_u *find, char_u *ignore)
+    int
+get_number_indent(linenr_T lnum)
 {
-    char_u	*p = s;
-    char_u	*r;
-    int		len = (int)STRLEN(find);
+    colnr_T	col;
+    pos_T	pos;
 
-    while (*p != NUL)
+    regmatch_T	regmatch;
+    int		lead_len = 0;	// length of comment leader
+
+    if (lnum > curbuf->b_ml.ml_line_count)
+	return -1;
+    pos.lnum = 0;
+
+    // In format_lines() (i.e. not insert mode), fo+=q is needed too...
+    if ((State & INSERT) || has_format_option(FO_Q_COMS))
+	lead_len = get_leader_len(ml_get(lnum), NULL, FALSE, TRUE);
+
+    regmatch.regprog = vim_regcomp(curbuf->b_p_flp, RE_MAGIC);
+    if (regmatch.regprog != NULL)
     {
-	p = cin_skipcomment(p);
-	if (STRNCMP(p, find, len) == 0)
+	regmatch.rm_ic = FALSE;
+
+	// vim_regexec() expects a pointer to a line.  This lets us
+	// start matching for the flp beyond any comment leader...
+	if (vim_regexec(&regmatch, ml_get(lnum) + lead_len, (colnr_T)0))
 	{
-	    r = skipwhite(p + len);
-	    if (ignore != NULL && STRNCMP(r, ignore, STRLEN(ignore)) == 0)
-		r = skipwhite(r + STRLEN(ignore));
-	    if (cin_nocode(r))
-		return TRUE;
+	    pos.lnum = lnum;
+	    pos.col = (colnr_T)(*regmatch.endp - ml_get(lnum));
+	    pos.coladd = 0;
 	}
-	if (*p != NUL)
-	    ++p;
+	vim_regfree(regmatch.regprog);
     }
-    return FALSE;
+
+    if (pos.lnum == 0 || *ml_get_pos(&pos) == NUL)
+	return -1;
+    getvcol(curwin, &pos, &col, NULL, NULL);
+    return (int)col;
 }
 
+#if defined(FEAT_LINEBREAK) || defined(PROTO)
 /*
- * Return TRUE when "s" starts with "word" and then a non-ID character.
+ * Return appropriate space number for breakindent, taking influencing
+ * parameters into account. Window must be specified, since it is not
+ * necessarily always the current one.
  */
-    static int
-cin_starts_with(char_u *s, char *word)
-{
-    int l = (int)STRLEN(word);
+    int
+get_breakindent_win(
+    win_T	*wp,
+    char_u	*line) // start of the line
+{
+    static int	    prev_indent = 0;  // cached indent value
+    static long	    prev_ts     = 0L; // cached tabstop value
+    static char_u   *prev_line = NULL; // cached pointer to line
+    static varnumber_T prev_tick = 0;   // changedtick of cached value
+# ifdef FEAT_VARTABS
+    static int      *prev_vts = NULL;    // cached vartabs values
+# endif
+    int		    bri = 0;
+    // window width minus window margin space, i.e. what rests for text
+    const int	    eff_wwidth = wp->w_width
+			    - ((wp->w_p_nu || wp->w_p_rnu)
+				&& (vim_strchr(p_cpo, CPO_NUMCOL) == NULL)
+						? number_width(wp) + 1 : 0);
+
+    // used cached indent, unless pointer or 'tabstop' changed
+    if (prev_line != line || prev_ts != wp->w_buffer->b_p_ts
+	    || prev_tick != CHANGEDTICK(wp->w_buffer)
+# ifdef FEAT_VARTABS
+	    || prev_vts != wp->w_buffer->b_p_vts_array
+# endif
+	)
+    {
+	prev_line = line;
+	prev_ts = wp->w_buffer->b_p_ts;
+	prev_tick = CHANGEDTICK(wp->w_buffer);
+# ifdef FEAT_VARTABS
+	prev_vts = wp->w_buffer->b_p_vts_array;
+	prev_indent = get_indent_str_vtab(line,
+				     (int)wp->w_buffer->b_p_ts,
+				    wp->w_buffer->b_p_vts_array, wp->w_p_list);
+# else
+	prev_indent = get_indent_str(line,
+				     (int)wp->w_buffer->b_p_ts, wp->w_p_list);
+# endif
+    }
+    bri = prev_indent + wp->w_p_brishift;
+
+    // indent minus the length of the showbreak string
+    if (wp->w_p_brisbr)
+	bri -= vim_strsize(p_sbr);
+
+    // Add offset for number column, if 'n' is in 'cpoptions'
+    bri += win_col_off2(wp);
+
+    // never indent past left window margin
+    if (bri < 0)
+	bri = 0;
+    // always leave at least bri_min characters on the left,
+    // if text width is sufficient
+    else if (bri > eff_wwidth - wp->w_p_brimin)
+	bri = (eff_wwidth - wp->w_p_brimin < 0)
+			    ? 0 : eff_wwidth - wp->w_p_brimin;
 
-    return (STRNCMP(s, word, l) == 0 && !vim_isIDc(s[l]));
+    return bri;
 }
+#endif
 
 /*
- * Skip strings, chars and comments until at or past "trypos".
- * Return the column found.
+ * 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.
  */
-    static int
-cin_skip2pos(pos_T *trypos)
+    int
+inindent(int extra)
 {
-    char_u	*line;
-    char_u	*p;
-    char_u	*new_p;
+    char_u	*ptr;
+    colnr_T	col;
 
-    p = line = ml_get(trypos->lnum);
-    while (*p && (colnr_T)(p - line) < trypos->col)
-    {
-	if (cin_iscomment(p))
-	    p = cin_skipcomment(p);
-	else
-	{
-	    new_p = skip_string(p);
-	    if (new_p == p)
-		++p;
-	    else
-		p = new_p;
-	}
-    }
-    return (int)(p - line);
+    for (col = 0, ptr = ml_get_curline(); VIM_ISWHITE(*ptr); ++col)
+	++ptr;
+    if (col >= curwin->w_cursor.col + extra)
+	return TRUE;
+    else
+	return FALSE;
 }
 
+#if defined(FEAT_LISP) || defined(FEAT_CINDENT) || defined(PROTO)
 /*
- * Find the '{' at the start of the block we are in.
- * Return NULL if no match found.
- * Ignore a '{' that is in a comment, makes indenting the next three lines
- * work.
+ * op_reindent - handle reindenting a block of lines.
  */
-/* foo()    */
-/* {	    */
-/* }	    */
-
-    static pos_T *
-find_start_brace(void)	    // XXX
+    void
+op_reindent(oparg_T *oap, int (*how)(void))
 {
-    pos_T	cursor_save;
-    pos_T	*trypos;
-    pos_T	*pos;
-    static pos_T	pos_copy;
+    long	i;
+    char_u	*l;
+    int		amount;
+    linenr_T	first_changed = 0;
+    linenr_T	last_changed = 0;
+    linenr_T	start_lnum = curwin->w_cursor.lnum;
 
-    cursor_save = curwin->w_cursor;
-    while ((trypos = findmatchlimit(NULL, '{', FM_BLOCKSTOP, 0)) != NULL)
+    // Don't even try when 'modifiable' is off.
+    if (!curbuf->b_p_ma)
     {
-	pos_copy = *trypos;	// copy pos_T, next findmatch will change it
-	trypos = &pos_copy;
-	curwin->w_cursor = *trypos;
-	pos = NULL;
-	// ignore the { if it's in a // or / *  * / comment
-	if ((colnr_T)cin_skip2pos(trypos) == trypos->col
-		       && (pos = ind_find_start_CORS(NULL)) == NULL) // XXX
-	    break;
-	if (pos != NULL)
-	    curwin->w_cursor.lnum = pos->lnum;
+	emsg(_(e_modifiable));
+	return;
     }
-    curwin->w_cursor = cursor_save;
-    return trypos;
-}
-
-/*
- * Find the matching '(', ignoring it if it is in a comment.
- * Return NULL if no match found.
- */
-    static pos_T *
-find_match_paren(int ind_maxparen)	// XXX
-{
-    return find_match_char('(', ind_maxparen);
-}
 
-    static pos_T *
-find_match_char(int c, int ind_maxparen)	// XXX
-{
-    pos_T	cursor_save;
-    pos_T	*trypos;
-    static pos_T pos_copy;
-    int		ind_maxp_wk;
-
-    cursor_save = curwin->w_cursor;
-    ind_maxp_wk = ind_maxparen;
-retry:
-    if ((trypos = findmatchlimit(NULL, c, 0, ind_maxp_wk)) != NULL)
+    for (i = oap->line_count; --i >= 0 && !got_int; )
     {
-	// check if the ( is in a // comment
-	if ((colnr_T)cin_skip2pos(trypos) > trypos->col)
-	{
-	    ind_maxp_wk = ind_maxparen - (int)(cursor_save.lnum - trypos->lnum);
-	    if (ind_maxp_wk > 0)
-	    {
-		curwin->w_cursor = *trypos;
-		curwin->w_cursor.col = 0;	// XXX
-		goto retry;
-	    }
-	    trypos = NULL;
-	}
-	else
+	// it's a slow thing to do, so give feedback so there's no worry that
+	// the computer's just hung.
+
+	if (i > 1
+		&& (i % 50 == 0 || i == oap->line_count - 1)
+		&& oap->line_count > p_report)
+	    smsg(_("%ld lines to indent... "), i);
+
+	// Be vi-compatible: For lisp indenting the first line is not
+	// indented, unless there is only one line.
+# ifdef FEAT_LISP
+	if (i != oap->line_count - 1 || oap->line_count == 1
+						    || how != get_lisp_indent)
+# endif
 	{
-	    pos_T	*trypos_wk;
+	    l = skipwhite(ml_get_curline());
+	    if (*l == NUL)		    // empty or blank line
+		amount = 0;
+	    else
+		amount = how();		    // get the indent for this line
 
-	    pos_copy = *trypos;	    // copy trypos, findmatch will change it
-	    trypos = &pos_copy;
-	    curwin->w_cursor = *trypos;
-	    if ((trypos_wk = ind_find_start_CORS(NULL)) != NULL) // XXX
+	    if (amount >= 0 && set_indent(amount, SIN_UNDO))
 	    {
-		ind_maxp_wk = ind_maxparen - (int)(cursor_save.lnum
-			- trypos_wk->lnum);
-		if (ind_maxp_wk > 0)
-		{
-		    curwin->w_cursor = *trypos_wk;
-		    goto retry;
-		}
-		trypos = NULL;
+		// did change the indent, call changed_lines() later
+		if (first_changed == 0)
+		    first_changed = curwin->w_cursor.lnum;
+		last_changed = curwin->w_cursor.lnum;
 	    }
 	}
+	++curwin->w_cursor.lnum;
+	curwin->w_cursor.col = 0;  // make sure it's valid
     }
-    curwin->w_cursor = cursor_save;
-    return trypos;
-}
 
-/*
- * Find the matching '(', ignoring it if it is in a comment or before an
- * unmatched {.
- * Return NULL if no match found.
- */
-    static pos_T *
-find_match_paren_after_brace (int ind_maxparen)	    // XXX
-{
-    pos_T	*trypos = find_match_paren(ind_maxparen);
+    // put cursor on first non-blank of indented line
+    curwin->w_cursor.lnum = start_lnum;
+    beginline(BL_SOL | BL_FIX);
+
+    // Mark changed lines so that they will be redrawn.  When Visual
+    // highlighting was present, need to continue until the last line.  When
+    // there is no change still need to remove the Visual highlighting.
+    if (last_changed != 0)
+	changed_lines(first_changed, 0,
+		oap->is_VIsual ? start_lnum + oap->line_count :
+		last_changed + 1, 0L);
+    else if (oap->is_VIsual)
+	redraw_curbuf_later(INVERTED);
 
-    if (trypos != NULL)
+    if (oap->line_count > p_report)
     {
-	pos_T	*tryposBrace = find_start_brace();
-
-	// If both an unmatched '(' and '{' is found.  Ignore the '('
-	// position if the '{' is further down.
-	if (tryposBrace != NULL
-		&& (trypos->lnum != tryposBrace->lnum
-		    ? trypos->lnum < tryposBrace->lnum
-		    : trypos->col < tryposBrace->col))
-	    trypos = NULL;
+	i = oap->line_count - (i + 1);
+	smsg(NGETTEXT("%ld line indented ",
+						 "%ld lines indented ", i), i);
     }
-    return trypos;
+    // set '[ and '] marks
+    curbuf->b_op_start = oap->start;
+    curbuf->b_op_end = oap->end;
 }
+#endif // defined(FEAT_LISP) || defined(FEAT_CINDENT)
 
+#if defined(FEAT_SMARTINDENT) || defined(FEAT_CINDENT) || defined(PROTO)
 /*
- * Return ind_maxparen corrected for the difference in line number between the
- * cursor position and "startpos".  This makes sure that searching for a
- * matching paren above the cursor line doesn't find a match because of
- * looking a few lines further.
+ * Return TRUE if lines starting with '#' should be left aligned.
  */
-    static int
-corr_ind_maxparen(pos_T *startpos)
-{
-    long	n = (long)startpos->lnum - (long)curwin->w_cursor.lnum;
-
-    if (n > 0 && n < curbuf->b_ind_maxparen / 2)
-	return curbuf->b_ind_maxparen - (int)n;
-    return curbuf->b_ind_maxparen;
+    int
+preprocs_left(void)
+{
+    return
+# ifdef FEAT_SMARTINDENT
+#  ifdef FEAT_CINDENT
+	(curbuf->b_p_si && !curbuf->b_p_cin) ||
+#  else
+	curbuf->b_p_si
+#  endif
+# endif
+# ifdef FEAT_CINDENT
+	(curbuf->b_p_cin && in_cinkeys('#', ' ', TRUE)
+					   && curbuf->b_ind_hash_comment == 0)
+# endif
+	;
 }
+#endif
 
+#ifdef FEAT_SMARTINDENT
 /*
- * Set w_cursor.col to the column number of the last unmatched ')' or '{' in
- * line "l".  "l" must point to the start of the line.
+ * Try to do some very smart auto-indenting.
+ * Used when inserting a "normal" character.
  */
-    static int
-find_last_paren(char_u *l, int start, int end)
+    void
+ins_try_si(int c)
 {
+    pos_T	*pos, old_pos;
+    char_u	*ptr;
     int		i;
-    int		retval = FALSE;
-    int		open_count = 0;
-
-    curwin->w_cursor.col = 0;		    // default is start of line
-
-    for (i = 0; l[i] != NUL; i++)
-    {
-	i = (int)(cin_skipcomment(l + i) - l); // ignore parens in comments
-	i = (int)(skip_string(l + i) - l);    // ignore parens in quotes
-	if (l[i] == start)
-	    ++open_count;
-	else if (l[i] == end)
-	{
-	    if (open_count > 0)
-		--open_count;
+    int		temp;
+
+    // do some very smart indenting when entering '{' or '}'
+    if (((did_si || can_si_back) && c == '{') || (can_si && c == '}'))
+    {
+	// for '}' set indent equal to indent of line containing matching '{'
+	if (c == '}' && (pos = findmatch(NULL, '{')) != NULL)
+	{
+	    old_pos = curwin->w_cursor;
+	    // If the matching '{' has a ')' immediately before it (ignoring
+	    // white-space), then line up with the start of the line
+	    // containing the matching '(' if there is one.  This handles the
+	    // case where an "if (..\n..) {" statement continues over multiple
+	    // lines -- webb
+	    ptr = ml_get(pos->lnum);
+	    i = pos->col;
+	    if (i > 0)		// skip blanks before '{'
+		while (--i > 0 && VIM_ISWHITE(ptr[i]))
+		    ;
+	    curwin->w_cursor.lnum = pos->lnum;
+	    curwin->w_cursor.col = i;
+	    if (ptr[i] == ')' && (pos = findmatch(NULL, '(')) != NULL)
+		curwin->w_cursor = *pos;
+	    i = get_indent();
+	    curwin->w_cursor = old_pos;
+	    if (State & VREPLACE_FLAG)
+		change_indent(INDENT_SET, i, FALSE, NUL, TRUE);
 	    else
+		(void)set_indent(i, SIN_CHANGED);
+	}
+	else if (curwin->w_cursor.col > 0)
+	{
+	    // when inserting '{' after "O" reduce indent, but not
+	    // more than indent of previous line
+	    temp = TRUE;
+	    if (c == '{' && can_si_back && curwin->w_cursor.lnum > 1)
 	    {
-		curwin->w_cursor.col = i;
-		retval = TRUE;
+		old_pos = curwin->w_cursor;
+		i = get_indent();
+		while (curwin->w_cursor.lnum > 1)
+		{
+		    ptr = skipwhite(ml_get(--(curwin->w_cursor.lnum)));
+
+		    // ignore empty lines and lines starting with '#'.
+		    if (*ptr != '#' && *ptr != NUL)
+			break;
+		}
+		if (get_indent() >= i)
+		    temp = FALSE;
+		curwin->w_cursor = old_pos;
 	    }
+	    if (temp)
+		shift_line(TRUE, FALSE, 1, TRUE);
 	}
     }
-    return retval;
+
+    // set indent of '#' always to 0
+    if (curwin->w_cursor.col > 0 && can_si && c == '#')
+    {
+	// remember current indent for next line
+	old_indent = get_indent();
+	(void)set_indent(0, SIN_CHANGED);
+    }
+
+    // Adjust ai_col, the char at this position can be deleted.
+    if (ai_col > curwin->w_cursor.col)
+	ai_col = curwin->w_cursor.col;
 }
+#endif
 
 /*
- * Parse 'cinoptions' and set the values in "curbuf".
- * Must be called when 'cinoptions', 'shiftwidth' and/or 'tabstop' changes.
+ * Insert an indent (for <Tab> or CTRL-T) or delete an indent (for CTRL-D).
+ * Keep the cursor on the same character.
+ * type == INDENT_INC	increase indent (for CTRL-T or <Tab>)
+ * type == INDENT_DEC	decrease indent (for CTRL-D)
+ * type == INDENT_SET	set indent to "amount"
+ * if round is TRUE, round the indent to 'shiftwidth' (only with _INC and _Dec).
  */
     void
-parse_cino(buf_T *buf)
-{
-    char_u	*p;
-    char_u	*l;
-    char_u	*digits;
-    int		n;
-    int		divider;
-    int		fraction = 0;
-    int		sw = (int)get_sw_value(buf);
-
-    // Set the default values.
-
-    // Spaces from a block's opening brace the prevailing indent for that
-    // block should be.
-    buf->b_ind_level = sw;
-
-    // Spaces from the edge of the line an open brace that's at the end of a
-    // line is imagined to be.
-    buf->b_ind_open_imag = 0;
-
-    // Spaces from the prevailing indent for a line that is not preceded by
-    // an opening brace.
-    buf->b_ind_no_brace = 0;
-
-    // Column where the first { of a function should be located }.
-    buf->b_ind_first_open = 0;
-
-    // Spaces from the prevailing indent a leftmost open brace should be
-    // located.
-    buf->b_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.
-    buf->b_ind_close_extra = 0;
-
-    // Spaces from the edge of the line an open brace sitting in the leftmost
-    // column is imagined to be.
-    buf->b_ind_open_left_imag = 0;
-
-    // Spaces jump labels should be shifted to the left if N is non-negative,
-    // otherwise the jump label will be put to column 1.
-    buf->b_ind_jump_label = -1;
-
-    // Spaces from the switch() indent a "case xx" label should be located.
-    buf->b_ind_case = sw;
-
-    // Spaces from the "case xx:" code after a switch() should be located.
-    buf->b_ind_case_code = sw;
-
-    // Lineup break at end of case in switch() with case label.
-    buf->b_ind_case_break = 0;
-
-    // Spaces from the class declaration indent a scope declaration label
-    // should be located.
-    buf->b_ind_scopedecl = sw;
-
-    // Spaces from the scope declaration label code should be located.
-    buf->b_ind_scopedecl_code = sw;
-
-    // Amount K&R-style parameters should be indented.
-    buf->b_ind_param = sw;
-
-    // Amount a function type spec should be indented.
-    buf->b_ind_func_type = sw;
-
-    // Amount a cpp base class declaration or constructor initialization
-    // should be indented.
-    buf->b_ind_cpp_baseclass = sw;
-
-    // additional spaces beyond the prevailing indent a continuation line
-    // should be located.
-    buf->b_ind_continuation = sw;
-
-    // Spaces from the indent of the line with an unclosed parentheses.
-    buf->b_ind_unclosed = sw * 2;
-
-    // Spaces from the indent of the line with an unclosed parentheses, which
-    // itself is also unclosed.
-    buf->b_ind_unclosed2 = sw;
-
-    // Suppress ignoring spaces from the indent of a line starting with an
-    // unclosed parentheses.
-    buf->b_ind_unclosed_noignore = 0;
-
-    // If the opening paren is the last nonwhite character on the line, and
-    // b_ind_unclosed_wrapped is nonzero, use this indent relative to the outer
-    // context (for very long lines).
-    buf->b_ind_unclosed_wrapped = 0;
-
-    // Suppress ignoring white space when lining up with the character after
-    // an unclosed parentheses.
-    buf->b_ind_unclosed_whiteok = 0;
-
-    // Indent a closing parentheses under the line start of the matching
-    // opening parentheses.
-    buf->b_ind_matching_paren = 0;
-
-    // Indent a closing parentheses under the previous line.
-    buf->b_ind_paren_prev = 0;
-
-    // Extra indent for comments.
-    buf->b_ind_comment = 0;
-
-    // Spaces from the comment opener when there is nothing after it.
-    buf->b_ind_in_comment = 3;
-
-    // Boolean: if non-zero, use b_ind_in_comment even if there is something
-    // after the comment opener.
-    buf->b_ind_in_comment2 = 0;
-
-    // Max lines to search for an open paren.
-    buf->b_ind_maxparen = 20;
-
-    // Max lines to search for an open comment.
-    buf->b_ind_maxcomment = 70;
+change_indent(
+    int		type,
+    int		amount,
+    int		round,
+    int		replaced,	// replaced character, put on replace stack
+    int		call_changed_bytes)	// call changed_bytes()
+{
+    int		vcol;
+    int		last_vcol;
+    int		insstart_less;		// reduction for Insstart.col
+    int		new_cursor_col;
+    int		i;
+    char_u	*ptr;
+    int		save_p_list;
+    int		start_col;
+    colnr_T	vc;
+    colnr_T	orig_col = 0;		// init for GCC
+    char_u	*new_line, *orig_line = NULL;	// init for GCC
 
-    // Handle braces for java code.
-    buf->b_ind_java = 0;
+    // VREPLACE mode needs to know what the line was like before changing
+    if (State & VREPLACE_FLAG)
+    {
+	orig_line = vim_strsave(ml_get_curline());  // Deal with NULL below
+	orig_col = curwin->w_cursor.col;
+    }
 
-    // Not to confuse JS object properties with labels.
-    buf->b_ind_js = 0;
+    // for the following tricks we don't want list mode
+    save_p_list = curwin->w_p_list;
+    curwin->w_p_list = FALSE;
+    vc = getvcol_nolist(&curwin->w_cursor);
+    vcol = vc;
 
-    // Handle blocked cases correctly.
-    buf->b_ind_keep_case_label = 0;
+    // For Replace mode we need to fix the replace stack later, which is only
+    // possible when the cursor is in the indent.  Remember the number of
+    // characters before the cursor if it's possible.
+    start_col = curwin->w_cursor.col;
 
-    // Handle C++ namespace.
-    buf->b_ind_cpp_namespace = 0;
+    // determine offset from first non-blank
+    new_cursor_col = curwin->w_cursor.col;
+    beginline(BL_WHITE);
+    new_cursor_col -= curwin->w_cursor.col;
 
-    // Handle continuation lines containing conditions of if(), for() and
-    // while().
-    buf->b_ind_if_for_while = 0;
+    insstart_less = curwin->w_cursor.col;
 
-    // indentation for # comments
-    buf->b_ind_hash_comment = 0;
+    // If the cursor is in the indent, compute how many screen columns the
+    // cursor is to the left of the first non-blank.
+    if (new_cursor_col < 0)
+	vcol = get_indent() - vcol;
 
-    // Handle C++ extern "C" or "C++"
-    buf->b_ind_cpp_extern_c = 0;
+    if (new_cursor_col > 0)	    // can't fix replace stack
+	start_col = -1;
 
-    for (p = buf->b_p_cino; *p; )
+    // Set the new indent.  The cursor will be put on the first non-blank.
+    if (type == INDENT_SET)
+	(void)set_indent(amount, call_changed_bytes ? SIN_CHANGED : 0);
+    else
     {
-	l = p++;
-	if (*p == '-')
-	    ++p;
-	digits = p;	    // remember where the digits start
-	n = getdigits(&p);
-	divider = 0;
-	if (*p == '.')	    // ".5s" means a fraction
-	{
-	    fraction = atol((char *)++p);
-	    while (VIM_ISDIGIT(*p))
-	    {
-		++p;
-		if (divider)
-		    divider *= 10;
-		else
-		    divider = 10;
-	    }
-	}
-	if (*p == 's')	    // "2s" means two times 'shiftwidth'
+	int	save_State = State;
+
+	// Avoid being called recursively.
+	if (State & VREPLACE_FLAG)
+	    State = INSERT;
+	shift_line(type == INDENT_DEC, round, 1, call_changed_bytes);
+	State = save_State;
+    }
+    insstart_less -= curwin->w_cursor.col;
+
+    // Try to put cursor on same character.
+    // If the cursor is at or after the first non-blank in the line,
+    // compute the cursor column relative to the column of the first
+    // non-blank character.
+    // If we are not in insert mode, leave the cursor on the first non-blank.
+    // If the cursor is before the first non-blank, position it relative
+    // to the first non-blank, counted in screen columns.
+    if (new_cursor_col >= 0)
+    {
+	// When changing the indent while the cursor is touching it, reset
+	// Insstart_col to 0.
+	if (new_cursor_col == 0)
+	    insstart_less = MAXCOL;
+	new_cursor_col += curwin->w_cursor.col;
+    }
+    else if (!(State & INSERT))
+	new_cursor_col = curwin->w_cursor.col;
+    else
+    {
+	// Compute the screen column where the cursor should be.
+	vcol = get_indent() - vcol;
+	curwin->w_virtcol = (colnr_T)((vcol < 0) ? 0 : vcol);
+
+	// Advance the cursor until we reach the right screen column.
+	vcol = last_vcol = 0;
+	new_cursor_col = -1;
+	ptr = ml_get_curline();
+	while (vcol <= (int)curwin->w_virtcol)
 	{
-	    if (p == digits)
-		n = sw;	// just "s" is one 'shiftwidth'
+	    last_vcol = vcol;
+	    if (has_mbyte && new_cursor_col >= 0)
+		new_cursor_col += (*mb_ptr2len)(ptr + new_cursor_col);
 	    else
-	    {
-		n *= sw;
-		if (divider)
-		    n += (sw * fraction + divider / 2) / divider;
-	    }
-	    ++p;
+		++new_cursor_col;
+	    vcol += lbr_chartabsize(ptr, ptr + new_cursor_col, (colnr_T)vcol);
 	}
-	if (l[1] == '-')
-	    n = -n;
+	vcol = last_vcol;
 
-	// When adding an entry here, also update the default 'cinoptions' in
-	// doc/indent.txt, and add explanation for it!
-	switch (*l)
+	// May need to insert spaces to be able to position the cursor on
+	// the right screen column.
+	if (vcol != (int)curwin->w_virtcol)
 	{
-	    case '>': buf->b_ind_level = n; break;
-	    case 'e': buf->b_ind_open_imag = n; break;
-	    case 'n': buf->b_ind_no_brace = n; break;
-	    case 'f': buf->b_ind_first_open = n; break;
-	    case '{': buf->b_ind_open_extra = n; break;
-	    case '}': buf->b_ind_close_extra = n; break;
-	    case '^': buf->b_ind_open_left_imag = n; break;
-	    case 'L': buf->b_ind_jump_label = n; break;
-	    case ':': buf->b_ind_case = n; break;
-	    case '=': buf->b_ind_case_code = n; break;
-	    case 'b': buf->b_ind_case_break = n; break;
-	    case 'p': buf->b_ind_param = n; break;
-	    case 't': buf->b_ind_func_type = n; break;
-	    case '/': buf->b_ind_comment = n; break;
-	    case 'c': buf->b_ind_in_comment = n; break;
-	    case 'C': buf->b_ind_in_comment2 = n; break;
-	    case 'i': buf->b_ind_cpp_baseclass = n; break;
-	    case '+': buf->b_ind_continuation = n; break;
-	    case '(': buf->b_ind_unclosed = n; break;
-	    case 'u': buf->b_ind_unclosed2 = n; break;
-	    case 'U': buf->b_ind_unclosed_noignore = n; break;
-	    case 'W': buf->b_ind_unclosed_wrapped = n; break;
-	    case 'w': buf->b_ind_unclosed_whiteok = n; break;
-	    case 'm': buf->b_ind_matching_paren = n; break;
-	    case 'M': buf->b_ind_paren_prev = n; break;
-	    case ')': buf->b_ind_maxparen = n; break;
-	    case '*': buf->b_ind_maxcomment = n; break;
-	    case 'g': buf->b_ind_scopedecl = n; break;
-	    case 'h': buf->b_ind_scopedecl_code = n; break;
-	    case 'j': buf->b_ind_java = n; break;
-	    case 'J': buf->b_ind_js = n; break;
-	    case 'l': buf->b_ind_keep_case_label = n; break;
-	    case '#': buf->b_ind_hash_comment = n; break;
-	    case 'N': buf->b_ind_cpp_namespace = n; break;
-	    case 'k': buf->b_ind_if_for_while = n; break;
-	    case 'E': buf->b_ind_cpp_extern_c = n; break;
+	    curwin->w_cursor.col = (colnr_T)new_cursor_col;
+	    i = (int)curwin->w_virtcol - vcol;
+	    ptr = alloc(i + 1);
+	    if (ptr != NULL)
+	    {
+		new_cursor_col += i;
+		ptr[i] = NUL;
+		while (--i >= 0)
+		    ptr[i] = ' ';
+		ins_str(ptr);
+		vim_free(ptr);
+	    }
 	}
-	if (*p == ',')
-	    ++p;
-    }
-}
 
-/*
- * Return the desired indent for C code.
- * Return -1 if the indent should be left alone (inside a raw string).
- */
-    int
-get_c_indent(void)
-{
-    pos_T	cur_curpos;
-    int		amount;
-    int		scope_amount;
-    int		cur_amount = MAXCOL;
-    colnr_T	col;
-    char_u	*theline;
-    char_u	*linecopy;
-    pos_T	*trypos;
-    pos_T	*comment_pos;
-    pos_T	*tryposBrace = NULL;
-    pos_T	tryposCopy;
-    pos_T	our_paren_pos;
-    char_u	*start;
-    int		start_brace;
-#define BRACE_IN_COL0		1	    // '{' is in column 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;
-    char_u	terminated;
-    int		lookfor;
-#define LOOKFOR_INITIAL		0
-#define LOOKFOR_IF		1
-#define LOOKFOR_DO		2
-#define LOOKFOR_CASE		3
-#define LOOKFOR_ANY		4
-#define LOOKFOR_TERM		5
-#define LOOKFOR_UNTERM		6
-#define LOOKFOR_SCOPEDECL	7
-#define LOOKFOR_NOBREAK		8
-#define LOOKFOR_CPP_BASECLASS	9
-#define LOOKFOR_ENUM_OR_INIT	10
-#define LOOKFOR_JS_KEY		11
-#define LOOKFOR_COMMA		12
-
-    int		whilelevel;
-    linenr_T	lnum;
-    int		n;
-    int		iscase;
-    int		lookfor_break;
-    int		lookfor_cpp_namespace = FALSE;
-    int		cont_amount = 0;    // amount for continuation line
-    int		original_line_islabel;
-    int		added_to_amount = 0;
-    int		js_cur_has_key = 0;
-    linenr_T	raw_string_start = 0;
-    cpp_baseclass_cache_T cache_cpp_baseclass = { FALSE, { MAXLNUM, 0 } };
-
-    // make a copy, value is changed below
-    int		ind_continuation = curbuf->b_ind_continuation;
-
-    // remember where the cursor was when we started
-    cur_curpos = curwin->w_cursor;
-
-    // if we are at line 1 zero indent is fine, right?
-    if (cur_curpos.lnum == 1)
-	return 0;
-
-    // Get a copy of the current contents of the line.
-    // This is required, because only the most recent line obtained with
-    // ml_get is valid!
-    linecopy = vim_strsave(ml_get(cur_curpos.lnum));
-    if (linecopy == NULL)
-	return 0;
-
-    // In insert mode and the cursor is on a ')' truncate the line at the
-    // cursor position.  We don't want to line up with the matching '(' when
-    // inserting new stuff.
-    // For unknown reasons the cursor might be past the end of the line, thus
-    // check for that.
-    if ((State & INSERT)
-	    && curwin->w_cursor.col < (colnr_T)STRLEN(linecopy)
-	    && 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;
-
-    original_line_islabel = cin_islabel();  // XXX
-
-    // If we are inside a raw string don't change the indent.
-    // Ignore a raw string inside a comment.
-    comment_pos = ind_find_start_comment();
-    if (comment_pos != NULL)
-    {
-	// findmatchlimit() static pos is overwritten, make a copy
-	tryposCopy = *comment_pos;
-	comment_pos = &tryposCopy;
-    }
-    trypos = find_start_rawstring(curbuf->b_ind_maxcomment);
-    if (trypos != NULL && (comment_pos == NULL
-					     || LT_POS(*trypos, *comment_pos)))
-    {
-	amount = -1;
-	goto laterend;
+	// When changing the indent while the cursor is in it, reset
+	// Insstart_col to 0.
+	insstart_less = MAXCOL;
     }
 
-    // #defines and so on always go at the left when included in 'cinkeys'.
-    if (*theline == '#' && (*linecopy == '#' || in_cinkeys('#', ' ', TRUE)))
-    {
-	amount = curbuf->b_ind_hash_comment;
-	goto theend;
-    }
-
-    // Is it a non-case label?	Then that goes at the left margin too unless:
-    //  - JS flag is set.
-    //  - 'L' item has a positive value.
-    if (original_line_islabel && !curbuf->b_ind_js
-					      && curbuf->b_ind_jump_label < 0)
-    {
-	amount = 0;
-	goto theend;
-    }
+    curwin->w_p_list = save_p_list;
 
-    // If we're inside a "//" comment and there is a "//" comment in a
-    // previous line, lineup with that one.
-    if (cin_islinecomment(theline)
-	    && (trypos = find_line_comment()) != NULL) // XXX
-    {
-	// find how indented the line beginning the comment is
-	getvcol(curwin, trypos, &col, NULL, NULL);
-	amount = col;
-	goto theend;
-    }
+    if (new_cursor_col <= 0)
+	curwin->w_cursor.col = 0;
+    else
+	curwin->w_cursor.col = (colnr_T)new_cursor_col;
+    curwin->w_set_curswant = TRUE;
+    changed_cline_bef_curs();
 
-    // If we're inside a comment and not looking at the start of the
-    // comment, try using the 'comments' option.
-    if (!cin_iscomment(theline) && comment_pos != NULL) // XXX
+    // May have to adjust the start of the insert.
+    if (State & INSERT)
     {
-	int	lead_start_len = 2;
-	int	lead_middle_len = 1;
-	char_u	lead_start[COM_MAX_LEN];	// start-comment string
-	char_u	lead_middle[COM_MAX_LEN];	// middle-comment string
-	char_u	lead_end[COM_MAX_LEN];		// end-comment string
-	char_u	*p;
-	int	start_align = 0;
-	int	start_off = 0;
-	int	done = FALSE;
-
-	// find how indented the line beginning the comment is
-	getvcol(curwin, comment_pos, &col, NULL, NULL);
-	amount = col;
-	*lead_start = NUL;
-	*lead_middle = NUL;
-
-	p = curbuf->b_p_com;
-	while (*p != NUL)
+	if (curwin->w_cursor.lnum == Insstart.lnum && Insstart.col != 0)
 	{
-	    int	align = 0;
-	    int	off = 0;
-	    int what = 0;
-
-	    while (*p != NUL && *p != ':')
-	    {
-		if (*p == COM_START || *p == COM_END || *p == COM_MIDDLE)
-		    what = *p++;
-		else if (*p == COM_LEFT || *p == COM_RIGHT)
-		    align = *p++;
-		else if (VIM_ISDIGIT(*p) || *p == '-')
-		    off = getdigits(&p);
-		else
-		    ++p;
-	    }
-
-	    if (*p == ':')
-		++p;
-	    (void)copy_option_part(&p, lead_end, COM_MAX_LEN, ",");
-	    if (what == COM_START)
-	    {
-		STRCPY(lead_start, lead_end);
-		lead_start_len = (int)STRLEN(lead_start);
-		start_off = off;
-		start_align = align;
-	    }
-	    else if (what == COM_MIDDLE)
-	    {
-		STRCPY(lead_middle, lead_end);
-		lead_middle_len = (int)STRLEN(lead_middle);
-	    }
-	    else if (what == COM_END)
-	    {
-		// If our line starts with the middle comment string, line it
-		// up with the comment opener per the 'comments' option.
-		if (STRNCMP(theline, lead_middle, lead_middle_len) == 0
-			&& STRNCMP(theline, lead_end, STRLEN(lead_end)) != 0)
-		{
-		    done = TRUE;
-		    if (curwin->w_cursor.lnum > 1)
-		    {
-			// If the start comment string matches in the previous
-			// line, use the indent of that line plus offset.  If
-			// the middle comment string matches in the previous
-			// line, use the indent of that line.  XXX
-			look = skipwhite(ml_get(curwin->w_cursor.lnum - 1));
-			if (STRNCMP(look, lead_start, lead_start_len) == 0)
-			    amount = get_indent_lnum(curwin->w_cursor.lnum - 1);
-			else if (STRNCMP(look, lead_middle,
-							lead_middle_len) == 0)
-			{
-			    amount = get_indent_lnum(curwin->w_cursor.lnum - 1);
-			    break;
-			}
-			// If the start comment string doesn't match with the
-			// start of the comment, skip this entry.  XXX
-			else if (STRNCMP(ml_get(comment_pos->lnum) + comment_pos->col,
-					     lead_start, lead_start_len) != 0)
-			    continue;
-		    }
-		    if (start_off != 0)
-			amount += start_off;
-		    else if (start_align == COM_RIGHT)
-			amount += vim_strsize(lead_start)
-						   - vim_strsize(lead_middle);
-		    break;
-		}
-
-		// If our line starts with the end comment string, line it up
-		// with the middle comment
-		if (STRNCMP(theline, lead_middle, lead_middle_len) != 0
-			&& STRNCMP(theline, lead_end, STRLEN(lead_end)) == 0)
-		{
-		    amount = get_indent_lnum(curwin->w_cursor.lnum - 1);
-								     // XXX
-		    if (off != 0)
-			amount += off;
-		    else if (align == COM_RIGHT)
-			amount += vim_strsize(lead_start)
-						   - vim_strsize(lead_middle);
-		    done = TRUE;
-		    break;
-		}
-	    }
+	    if ((int)Insstart.col <= insstart_less)
+		Insstart.col = 0;
+	    else
+		Insstart.col -= insstart_less;
 	}
-
-	// 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 (done)
-	    ;
-	else if (theline[0] == '*')
-	    amount += 1;
+	if ((int)ai_col <= insstart_less)
+	    ai_col = 0;
 	else
-	{
-	    // If we are more than one line away from the comment opener, take
-	    // the indent of the previous non-empty line.  If 'cino' has "CO"
-	    // and we are just below the comment opener and there are any
-	    // white characters after it line up with the text after it;
-	    // otherwise, add the amount specified by "c" in 'cino'
-	    amount = -1;
-	    for (lnum = cur_curpos.lnum - 1; lnum > comment_pos->lnum; --lnum)
-	    {
-		if (linewhite(lnum))		    // skip blank lines
-		    continue;
-		amount = get_indent_lnum(lnum);	    // XXX
-		break;
-	    }
-	    if (amount == -1)			    // use the comment opener
-	    {
-		if (!curbuf->b_ind_in_comment2)
-		{
-		    start = ml_get(comment_pos->lnum);
-		    look = start + comment_pos->col + 2; // skip / and *
-		    if (*look != NUL)		    // if something after it
-			comment_pos->col = (colnr_T)(skipwhite(look) - start);
-		}
-		getvcol(curwin, comment_pos, &col, NULL, NULL);
-		amount = col;
-		if (curbuf->b_ind_in_comment2 || *look == NUL)
-		    amount += curbuf->b_ind_in_comment;
-	    }
-	}
-	goto theend;
-    }
-
-    // Are we looking at a ']' that has a match?
-    if (*skipwhite(theline) == ']'
-	    && (trypos = find_match_char('[', curbuf->b_ind_maxparen)) != NULL)
-    {
-	// align with the line containing the '['.
-	amount = get_indent_lnum(trypos->lnum);
-	goto theend;
+	    ai_col -= insstart_less;
     }
 
-    // Are we inside parentheses or braces?  XXX
-    if (((trypos = find_match_paren(curbuf->b_ind_maxparen)) != NULL
-		&& curbuf->b_ind_java == 0)
-	    || (tryposBrace = find_start_brace()) != NULL
-	    || trypos != NULL)
+    // For REPLACE mode, may have to fix the replace stack, if it's possible.
+    // If the number of characters before the cursor decreased, need to pop a
+    // few characters from the replace stack.
+    // If the number of characters before the cursor increased, need to push a
+    // few NULs onto the replace stack.
+    if (REPLACE_NORMAL(State) && start_col >= 0)
     {
-      if (trypos != NULL && tryposBrace != NULL)
-      {
-	  // Both an unmatched '(' and '{' is found.  Use the one which is
-	  // closer to the current cursor position, set the other to NULL.
-	  if (trypos->lnum != tryposBrace->lnum
-		  ? trypos->lnum < tryposBrace->lnum
-		  : trypos->col < tryposBrace->col)
-	      trypos = NULL;
-	  else
-	      tryposBrace = NULL;
-      }
-
-      if (trypos != 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.
-	if (theline[0] == ')' && curbuf->b_ind_paren_prev)
+	while (start_col > (int)curwin->w_cursor.col)
 	{
-	    // Line up with the start of the matching paren line.
-	    amount = get_indent_lnum(curwin->w_cursor.lnum - 1);  // XXX
+	    replace_join(0);	    // remove a NUL from the replace stack
+	    --start_col;
 	}
-	else
+	while (start_col < (int)curwin->w_cursor.col || replaced)
 	{
-	    amount = -1;
-	    our_paren_pos = *trypos;
-	    for (lnum = cur_curpos.lnum - 1; lnum > our_paren_pos.lnum; --lnum)
+	    replace_push(NUL);
+	    if (replaced)
 	    {
-		l = skipwhite(ml_get(lnum));
-		if (cin_nocode(l))		// skip comment lines
-		    continue;
-		if (cin_ispreproc_cont(&l, &lnum, &amount))
-		    continue;			// ignore #define, #if, etc.
-		curwin->w_cursor.lnum = lnum;
-
-		// Skip a comment or raw string.  XXX
-		if ((trypos = ind_find_start_CORS(NULL)) != NULL)
-		{
-		    lnum = trypos->lnum + 1;
-		    continue;
-		}
-
-		// XXX
-		if ((trypos = find_match_paren(
-			corr_ind_maxparen(&cur_curpos))) != NULL
-			&& trypos->lnum == our_paren_pos.lnum
-			&& trypos->col == our_paren_pos.col)
-		{
-			amount = get_indent_lnum(lnum);	// XXX
-
-			if (theline[0] == ')')
-			{
-			    if (our_paren_pos.lnum != lnum
-						       && cur_amount > amount)
-				cur_amount = amount;
-			    amount = -1;
-			}
-		    break;
-		}
+		replace_push(replaced);
+		replaced = NUL;
 	    }
+	    ++start_col;
 	}
+    }
 
-	// Line up with line where the matching paren is. XXX
-	// If the line starts with a '(' or the indent for unclosed
-	// parentheses is zero, line up with the unclosed parentheses.
-	if (amount == -1)
-	{
-	    int	    ignore_paren_col = 0;
-	    int	    is_if_for_while = 0;
+    // For VREPLACE mode, we also have to fix the replace stack.  In this case
+    // it is always possible because we backspace over the whole line and then
+    // put it back again the way we wanted it.
+    if (State & VREPLACE_FLAG)
+    {
+	// If orig_line didn't allocate, just return.  At least we did the job,
+	// even if you can't backspace.
+	if (orig_line == NULL)
+	    return;
 
-	    if (curbuf->b_ind_if_for_while)
-	    {
-		// Look for the outermost opening parenthesis on this line
-		// and check whether it belongs to an "if", "for" or "while".
+	// Save new line
+	new_line = vim_strsave(ml_get_curline());
+	if (new_line == NULL)
+	    return;
 
-		pos_T	    cursor_save = curwin->w_cursor;
-		pos_T	    outermost;
-		char_u	    *line;
+	// We only put back the new line up to the cursor
+	new_line[curwin->w_cursor.col] = NUL;
 
-		trypos = &our_paren_pos;
-		do {
-		    outermost = *trypos;
-		    curwin->w_cursor.lnum = outermost.lnum;
-		    curwin->w_cursor.col = outermost.col;
+	// Put back original line
+	ml_replace(curwin->w_cursor.lnum, orig_line, FALSE);
+	curwin->w_cursor.col = orig_col;
 
-		    trypos = find_match_paren(curbuf->b_ind_maxparen);
-		} while (trypos && trypos->lnum == outermost.lnum);
+	// Backspace from cursor to start of line
+	backspace_until_column(0);
 
-		curwin->w_cursor = cursor_save;
+	// Insert new stuff into line again
+	ins_bytes(new_line);
 
-		line = ml_get(outermost.lnum);
+	vim_free(new_line);
+    }
+}
 
-		is_if_for_while =
-		    cin_is_if_for_while_before_offset(line, &outermost.col);
-	    }
+/*
+ * Copy the indent from ptr to the current line (and fill to size)
+ * Leaves the cursor on the first non-blank in the line.
+ * Returns TRUE if the line was changed.
+ */
+    int
+copy_indent(int size, char_u *src)
+{
+    char_u	*p = NULL;
+    char_u	*line = NULL;
+    char_u	*s;
+    int		todo;
+    int		ind_len;
+    int		line_len = 0;
+    int		tab_pad;
+    int		ind_done;
+    int		round;
+#ifdef FEAT_VARTABS
+    int		ind_col;
+#endif
 
-	    amount = skip_label(our_paren_pos.lnum, &look);
-	    look = skipwhite(look);
-	    if (*look == '(')
+    // Round 1: compute the number of characters needed for the indent
+    // Round 2: copy the characters.
+    for (round = 1; round <= 2; ++round)
+    {
+	todo = size;
+	ind_len = 0;
+	ind_done = 0;
+#ifdef FEAT_VARTABS
+	ind_col = 0;
+#endif
+	s = src;
+
+	// Count/copy the usable portion of the source line
+	while (todo > 0 && VIM_ISWHITE(*s))
+	{
+	    if (*s == TAB)
 	    {
-		linenr_T    save_lnum = curwin->w_cursor.lnum;
-		char_u	    *line;
-		int	    look_col;
-
-		// Ignore a '(' in front of the line that has a match before
-		// our matching '('.
-		curwin->w_cursor.lnum = our_paren_pos.lnum;
-		line = ml_get_curline();
-		look_col = (int)(look - line);
-		curwin->w_cursor.col = look_col + 1;
-		if ((trypos = findmatchlimit(NULL, ')', 0,
-						      curbuf->b_ind_maxparen))
-								      != NULL
-			  && trypos->lnum == our_paren_pos.lnum
-			  && trypos->col < our_paren_pos.col)
-		    ignore_paren_col = trypos->col + 1;
-
-		curwin->w_cursor.lnum = save_lnum;
-		look = ml_get(our_paren_pos.lnum) + look_col;
+#ifdef FEAT_VARTABS
+		tab_pad = tabstop_padding(ind_done, curbuf->b_p_ts,
+							curbuf->b_p_vts_array);
+#else
+		tab_pad = (int)curbuf->b_p_ts
+					   - (ind_done % (int)curbuf->b_p_ts);
+#endif
+		// Stop if this tab will overshoot the target
+		if (todo < tab_pad)
+		    break;
+		todo -= tab_pad;
+		ind_done += tab_pad;
+#ifdef FEAT_VARTABS
+		ind_col += tab_pad;
+#endif
 	    }
-	    if (theline[0] == ')' || (curbuf->b_ind_unclosed == 0
-						      && is_if_for_while == 0)
-		    || (!curbuf->b_ind_unclosed_noignore && *look == '('
-						    && ignore_paren_col == 0))
+	    else
 	    {
-		// If we're looking at a close paren, line up right there;
-		// otherwise, line up with the next (non-white) character.
-		// When b_ind_unclosed_wrapped is set and the matching paren is
-		// the last nonwhite character of the line, use either the
-		// indent of the current line or the indentation of the next
-		// outer paren and add b_ind_unclosed_wrapped (for very long
-		// lines).
-		if (theline[0] != ')')
-		{
-		    cur_amount = MAXCOL;
-		    l = ml_get(our_paren_pos.lnum);
-		    if (curbuf->b_ind_unclosed_wrapped
-				       && cin_ends_in(l, (char_u *)"(", NULL))
-		    {
-			// look for opening unmatched paren, indent one level
-			// for each additional level
-			n = 1;
-			for (col = 0; col < our_paren_pos.col; ++col)
-			{
-			    switch (l[col])
-			    {
-				case '(':
-				case '{': ++n;
-					  break;
-
-				case ')':
-				case '}': if (n > 1)
-					      --n;
-					  break;
-			    }
-			}
-
-			our_paren_pos.col = 0;
-			amount += n * curbuf->b_ind_unclosed_wrapped;
-		    }
-		    else if (curbuf->b_ind_unclosed_whiteok)
-			our_paren_pos.col++;
-		    else
-		    {
-			col = our_paren_pos.col + 1;
-			while (VIM_ISWHITE(l[col]))
-			    col++;
-			if (l[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".
-		if (our_paren_pos.col > 0)
-		{
-		    getvcol(curwin, &our_paren_pos, &col, NULL, NULL);
-		    if (cur_amount > (int)col)
-			cur_amount = col;
-		}
+		--todo;
+		++ind_done;
+#ifdef FEAT_VARTABS
+		++ind_col;
+#endif
 	    }
+	    ++ind_len;
+	    if (p != NULL)
+		*p++ = *s;
+	    ++s;
+	}
 
-	    if (theline[0] == ')' && curbuf->b_ind_matching_paren)
-	    {
-		// Line up with the start of the matching paren line.
-	    }
-	    else if ((curbuf->b_ind_unclosed == 0 && is_if_for_while == 0)
-		     || (!curbuf->b_ind_unclosed_noignore
-				    && *look == '(' && ignore_paren_col == 0))
+	// Fill to next tabstop with a tab, if possible
+#ifdef FEAT_VARTABS
+	tab_pad = tabstop_padding(ind_done, curbuf->b_p_ts,
+							curbuf->b_p_vts_array);
+#else
+	tab_pad = (int)curbuf->b_p_ts - (ind_done % (int)curbuf->b_p_ts);
+#endif
+	if (todo >= tab_pad && !curbuf->b_p_et)
+	{
+	    todo -= tab_pad;
+	    ++ind_len;
+#ifdef FEAT_VARTABS
+	    ind_col += tab_pad;
+#endif
+	    if (p != NULL)
+		*p++ = TAB;
+	}
+
+	// Add tabs required for indent
+	if (!curbuf->b_p_et)
+	{
+#ifdef FEAT_VARTABS
+	    for (;;)
 	    {
-		if (cur_amount != MAXCOL)
-		    amount = cur_amount;
+		tab_pad = tabstop_padding(ind_col, curbuf->b_p_ts,
+							curbuf->b_p_vts_array);
+		if (todo < tab_pad)
+		    break;
+		todo -= tab_pad;
+		++ind_len;
+		ind_col += tab_pad;
+		if (p != NULL)
+		    *p++ = TAB;
 	    }
-	    else
+#else
+	    while (todo >= (int)curbuf->b_p_ts)
 	    {
-		// Add b_ind_unclosed2 for each '(' before our matching one,
-		// but ignore (void) before the line (ignore_paren_col).
-		col = our_paren_pos.col;
-		while ((int)our_paren_pos.col > ignore_paren_col)
-		{
-		    --our_paren_pos.col;
-		    switch (*ml_get_pos(&our_paren_pos))
-		    {
-			case '(': amount += curbuf->b_ind_unclosed2;
-				  col = our_paren_pos.col;
-				  break;
-			case ')': amount -= curbuf->b_ind_unclosed2;
-				  col = MAXCOL;
-				  break;
-		    }
-		}
-
-		// Use b_ind_unclosed once, when the first '(' is not inside
-		// braces
-		if (col == MAXCOL)
-		    amount += curbuf->b_ind_unclosed;
-		else
-		{
-		    curwin->w_cursor.lnum = our_paren_pos.lnum;
-		    curwin->w_cursor.col = col;
-		    if (find_match_paren_after_brace(curbuf->b_ind_maxparen)
-								      != NULL)
-			amount += curbuf->b_ind_unclosed2;
-		    else
-		    {
-			if (is_if_for_while)
-			    amount += curbuf->b_ind_if_for_while;
-			else
-			    amount += curbuf->b_ind_unclosed;
-		    }
-		}
-		// For a line starting with ')' use the minimum of the two
-		// positions, to avoid giving it more indent than the previous
-		// lines:
-		//  func_long_name(		    if (x
-		//	arg				    && yy
-		//	)	  ^ not here	       )    ^ not here
-		if (cur_amount < amount)
-		    amount = cur_amount;
+		todo -= (int)curbuf->b_p_ts;
+		++ind_len;
+		if (p != NULL)
+		    *p++ = TAB;
 	    }
+#endif
 	}
 
-	// add extra indent for a comment
-	if (cin_iscomment(theline))
-	    amount += curbuf->b_ind_comment;
-      }
-      else
-      {
-	// We are inside braces, there is a { before this line at the position
-	// stored in tryposBrace.
-	// Make a copy of tryposBrace, it may point to pos_copy inside
-	// find_start_brace(), which may be changed somewhere.
-	tryposCopy = *tryposBrace;
-	tryposBrace = &tryposCopy;
-	trypos = tryposBrace;
-	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 == '{')
+	// Count/add spaces required for indent
+	while (todo > 0)
 	{
-	    getvcol(curwin, trypos, &col, NULL, NULL);
-	    amount = col;
-	    if (*start == '{')
-		start_brace = BRACE_IN_COL0;
-	    else
-		start_brace = BRACE_AT_START;
+	    --todo;
+	    ++ind_len;
+	    if (p != NULL)
+		*p++ = ' ';
 	}
-	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(curbuf->b_ind_maxparen))
-								      != NULL)
-		lnum = trypos->lnum;
-
-	    // It could have been something like
-	    //	   case 1: if (asdf &&
-	    //			ldfd) {
-	    //		    }
-	    if ((curbuf->b_ind_js || curbuf->b_ind_keep_case_label)
-			   && cin_iscase(skipwhite(ml_get_curline()), FALSE))
-		amount = get_indent();
-	    else if (curbuf->b_ind_js)
-		amount = get_indent_lnum(lnum);
-	    else
-		amount = skip_label(lnum, &l);
 
-	    start_brace = BRACE_AT_END;
+	if (p == NULL)
+	{
+	    // Allocate memory for the result: the copied indent, new indent
+	    // and the rest of the line.
+	    line_len = (int)STRLEN(ml_get_curline()) + 1;
+	    line = alloc(ind_len + line_len);
+	    if (line == NULL)
+		return FALSE;
+	    p = line;
 	}
+    }
 
-	// For Javascript check if the line starts with "key:".
-	if (curbuf->b_ind_js)
-	    js_cur_has_key = cin_has_js_key(theline);
+    // Append the original line
+    mch_memmove(p, ml_get_curline(), (size_t)line_len);
 
-	// 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 += curbuf->b_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 = LOOKFOR_INITIAL;
-	    if (cin_iselse(theline))
-		lookfor = LOOKFOR_IF;
-	    else if (cin_iswhileofdo(theline, cur_curpos.lnum)) // XXX
-		lookfor = LOOKFOR_DO;
-	    if (lookfor != LOOKFOR_INITIAL)
-	    {
-		curwin->w_cursor.lnum = cur_curpos.lnum;
-		if (find_match(lookfor, ourscope) == OK)
-		{
-		    amount = get_indent();	// XXX
-		    goto theend;
-		}
-	    }
+    // Replace the line
+    ml_replace(curwin->w_cursor.lnum, line, FALSE);
 
-	    // 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.
+    // Put the cursor after the indent.
+    curwin->w_cursor.col = ind_len;
+    return TRUE;
+}
 
-	    // if the '{' is  _really_ at the left margin, use the imaginary
-	    // location of a left-margin brace.  Otherwise, correct the
-	    // location for b_ind_open_extra.
+/*
+ * ":retab".
+ */
+    void
+ex_retab(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 */
+    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 */
+#ifdef FEAT_VARTABS
+    int		*new_vts_array = NULL;
+    char_u	*new_ts_str;		/* string value of tab argument */
+#else
+    int		temp;
+    int		new_ts;
+#endif
+    int		save_list;
+    linenr_T	first_line = 0;		/* first changed line */
+    linenr_T	last_line = 0;		/* last changed line */
 
-	    if (start_brace == BRACE_IN_COL0)	    // '{' is in column 0
-	    {
-		amount = curbuf->b_ind_open_left_imag;
-		lookfor_cpp_namespace = TRUE;
-	    }
-	    else if (start_brace == BRACE_AT_START &&
-		    lookfor_cpp_namespace)	  // '{' is at start
-	    {
+    save_list = curwin->w_p_list;
+    curwin->w_p_list = 0;	    /* don't want list mode here */
 
-		lookfor_cpp_namespace = TRUE;
-	    }
-	    else
+#ifdef FEAT_VARTABS
+    new_ts_str = eap->arg;
+    if (!tabstop_set(eap->arg, &new_vts_array))
+	return;
+    while (vim_isdigit(*(eap->arg)) || *(eap->arg) == ',')
+	++(eap->arg);
+
+    // This ensures that either new_vts_array and new_ts_str are freshly
+    // allocated, or new_vts_array points to an existing array and new_ts_str
+    // is null.
+    if (new_vts_array == NULL)
+    {
+	new_vts_array = curbuf->b_p_vts_array;
+	new_ts_str = NULL;
+    }
+    else
+	new_ts_str = vim_strnsave(new_ts_str, eap->arg - new_ts_str);
+#else
+    new_ts = getdigits(&(eap->arg));
+    if (new_ts < 0)
+    {
+	emsg(_(e_positive));
+	return;
+    }
+    if (new_ts == 0)
+	new_ts = curbuf->b_p_ts;
+#endif
+    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 (start_brace == BRACE_AT_END)    // '{' is at end of line
+		if (!got_tab && num_spaces == 0)
 		{
-		    amount += curbuf->b_ind_open_imag;
-
-		    l = skipwhite(ml_get_curline());
-		    if (cin_is_cpp_namespace(l))
-			amount += curbuf->b_ind_cpp_namespace;
-		    else if (cin_is_cpp_extern_c(l))
-			amount += curbuf->b_ind_cpp_extern_c;
+		    /* First consecutive white-space */
+		    start_vcol = vcol;
+		    start_col = col;
 		}
+		if (ptr[col] == ' ')
+		    num_spaces++;
 		else
-		{
-		    // Compensate for adding b_ind_open_extra later.
-		    amount -= curbuf->b_ind_open_extra;
-		    if (amount < 0)
-			amount = 0;
-		}
-	    }
-
-	    lookfor_break = FALSE;
-
-	    if (cin_iscase(theline, FALSE))	// it's a switch() label
-	    {
-		lookfor = LOOKFOR_CASE;	// find a previous switch() label
-		amount += curbuf->b_ind_case;
-	    }
-	    else if (cin_isscopedecl(theline))	// private:, ...
-	    {
-		lookfor = LOOKFOR_SCOPEDECL;	// class decl is this block
-		amount += curbuf->b_ind_scopedecl;
+		    got_tab = TRUE;
 	    }
 	    else
 	    {
-		if (curbuf->b_ind_case_break && cin_isbreak(theline))
-		    // break; ...
-		    lookfor_break = TRUE;
-
-		lookfor = LOOKFOR_INITIAL;
-		// b_ind_level from start of block
-		amount += curbuf->b_ind_level;
-	    }
-	    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)
-		{
-		    // We reached end of scope:
-		    // If looking for a enum or structure initialization
-		    // go further back:
-		    // If it is an initializer (enum xxx or xxx =), then
-		    // don't add ind_continuation, otherwise it is a variable
-		    // declaration:
-		    // int x,
-		    //     here; <-- add ind_continuation
-		    if (lookfor == LOOKFOR_ENUM_OR_INIT)
-		    {
-			if (curwin->w_cursor.lnum == 0
-				|| curwin->w_cursor.lnum
-					  < ourscope - curbuf->b_ind_maxparen)
-			{
-			    // nothing found (abuse curbuf->b_ind_maxparen as
-			    // limit) assume terminated line (i.e. a variable
-			    // initialization)
-			    if (cont_amount > 0)
-				amount = cont_amount;
-			    else if (!curbuf->b_ind_js)
-				amount += ind_continuation;
-			    break;
-			}
-
-			l = ml_get_curline();
-
-			// If we're in a comment or raw string now, skip to
-			// the start of it.
-			trypos = ind_find_start_CORS(NULL);
-			if (trypos != NULL)
-			{
-			    curwin->w_cursor.lnum = trypos->lnum + 1;
-			    curwin->w_cursor.col = 0;
-			    continue;
-			}
-
-			// Skip preprocessor directives and blank lines.
-			if (cin_ispreproc_cont(&l, &curwin->w_cursor.lnum,
-								    &amount))
-			    continue;
-
-			if (cin_nocode(l))
-			    continue;
-
-			terminated = cin_isterminated(l, FALSE, TRUE);
-
-			// If we are at top level and the line looks like a
-			// function declaration, we are done
-			// (it's a variable declaration).
-			if (start_brace != BRACE_IN_COL0
-			     || !cin_isfuncdecl(&l, curwin->w_cursor.lnum, 0))
-			{
-			    // if the line is terminated with another ','
-			    // it is a continued variable initialization.
-			    // don't add extra indent.
-			    // TODO: does not work, if  a function
-			    // declaration is split over multiple lines:
-			    // cin_isfuncdecl returns FALSE then.
-			    if (terminated == ',')
-				break;
-
-			    // if it es a enum declaration or an assignment,
-			    // we are done.
-			    if (terminated != ';' && cin_isinit())
-				break;
-
-			    // nothing useful found
-			    if (terminated == 0 || terminated == '{')
-				continue;
-			}
-
-			if (terminated != ';')
-			{
-			    // Skip parens and braces. Position the cursor
-			    // over the rightmost paren, so that matching it
-			    // will take us back to the start of the line.
-			    // XXX
-			    trypos = NULL;
-			    if (find_last_paren(l, '(', ')'))
-				trypos = find_match_paren(
-						      curbuf->b_ind_maxparen);
-
-			    if (trypos == NULL && find_last_paren(l, '{', '}'))
-				trypos = find_start_brace();
-
-			    if (trypos != NULL)
-			    {
-				curwin->w_cursor.lnum = trypos->lnum + 1;
-				curwin->w_cursor.col = 0;
-				continue;
-			    }
-			}
-
-			// it's a variable declaration, add indentation
-			// like in
-			// int a,
-			//    b;
-			if (cont_amount > 0)
-			    amount = cont_amount;
-			else
-			    amount += ind_continuation;
-		    }
-		    else if (lookfor == LOOKFOR_UNTERM)
-		    {
-			if (cont_amount > 0)
-			    amount = cont_amount;
-			else
-			    amount += ind_continuation;
-		    }
-		    else
-		    {
-			if (lookfor != LOOKFOR_TERM
-					&& lookfor != LOOKFOR_CPP_BASECLASS
-					&& lookfor != LOOKFOR_COMMA)
-			{
-			    amount = scope_amount;
-			    if (theline[0] == '{')
-			    {
-				amount += curbuf->b_ind_open_extra;
-				added_to_amount = curbuf->b_ind_open_extra;
-			    }
-			}
-
-			if (lookfor_cpp_namespace)
-			{
-			    // Looking for C++ namespace, need to look further
-			    // back.
-			    if (curwin->w_cursor.lnum == ourscope)
-				continue;
-
-			    if (curwin->w_cursor.lnum == 0
-				    || curwin->w_cursor.lnum
-					      < ourscope - FIND_NAMESPACE_LIM)
-				break;
-
-			    l = ml_get_curline();
-
-			    // If we're in a comment or raw string now, skip
-			    // to the start of it.
-			    trypos = ind_find_start_CORS(NULL);
-			    if (trypos != NULL)
-			    {
-				curwin->w_cursor.lnum = trypos->lnum + 1;
-				curwin->w_cursor.col = 0;
-				continue;
-			    }
-
-			    // Skip preprocessor directives and blank lines.
-			    if (cin_ispreproc_cont(&l, &curwin->w_cursor.lnum,
-								    &amount))
-				continue;
-
-			    // Finally the actual check for "namespace".
-			    if (cin_is_cpp_namespace(l))
-			    {
-				amount += curbuf->b_ind_cpp_namespace
-							    - added_to_amount;
-				break;
-			    }
-			    else if (cin_is_cpp_extern_c(l))
-			    {
-				amount += curbuf->b_ind_cpp_extern_c
-							    - added_to_amount;
-				break;
-			    }
-
-			    if (cin_nocode(l))
-				continue;
-			}
-		    }
-		    break;
-		}
-
-		// If we're in a comment or raw string now, skip to the start
-		// of it.  XXX
-		if ((trypos = ind_find_start_CORS(&raw_string_start)) != NULL)
-		{
-		    curwin->w_cursor.lnum = trypos->lnum + 1;
-		    curwin->w_cursor.col = 0;
-		    continue;
-		}
-
-		l = ml_get_curline();
-
-		// If this is a switch() label, may line up relative to that.
-		// If this is a C++ scope declaration, do the same.
-		iscase = cin_iscase(l, FALSE);
-		if (iscase || cin_isscopedecl(l))
+		if (got_tab || (eap->forceit && num_spaces > 1))
 		{
-		    // we are only looking for cpp base class
-		    // declaration/initialization any longer
-		    if (lookfor == LOOKFOR_CPP_BASECLASS)
-			break;
-
-		    // When looking for a "do" we are not interested in
-		    // labels.
-		    if (whilelevel > 0)
-			continue;
-
-		    //	case xx:
-		    //	    c = 99 +	    <- this indent plus continuation
-		    //->	   here;
-		    if (lookfor == LOOKFOR_UNTERM
-					   || lookfor == LOOKFOR_ENUM_OR_INIT)
-		    {
-			if (cont_amount > 0)
-			    amount = cont_amount;
-			else
-			    amount += ind_continuation;
-			break;
-		    }
+		    /* Retabulate this string of white-space */
 
-		    //	case xx:	<- line up with this case
-		    //	    x = 333;
-		    //	case yy:
-		    if (       (iscase && lookfor == LOOKFOR_CASE)
-			    || (iscase && lookfor_break)
-			    || (!iscase && lookfor == LOOKFOR_SCOPEDECL))
+		    /* len is virtual length of white string */
+		    len = num_spaces = vcol - start_vcol;
+		    num_tabs = 0;
+		    if (!curbuf->b_p_et)
 		    {
-			// Check that this case label is not for another
-			// switch()		    XXX
-			if ((trypos = find_start_brace()) == NULL
-						  || trypos->lnum == ourscope)
-			{
-			    amount = get_indent();	// XXX
-			    break;
-			}
-			continue;
-		    }
+#ifdef FEAT_VARTABS
+			int t, s;
 
-		    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;
-
-			if (!lookfor_break)
-			    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 && cin_is_cinword(l))
-			{
-			    if (theline[0] == '{')
-				amount += curbuf->b_ind_open_extra;
-			    else
-				amount += curbuf->b_ind_level
-						     + curbuf->b_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() + (iscase    // XXX
-					? curbuf->b_ind_case_code
-					: curbuf->b_ind_scopedecl_code);
-		    lookfor = curbuf->b_ind_case_break
-					      ? LOOKFOR_NOBREAK : LOOKFOR_ANY;
-		    continue;
-		}
-
-		// Looking for a switch() label or C++ scope declaration,
-		// ignore other lines, skip {}-blocks.
-		if (lookfor == LOOKFOR_CASE || lookfor == LOOKFOR_SCOPEDECL)
-		{
-		    if (find_last_paren(l, '{', '}')
-				     && (trypos = find_start_brace()) != NULL)
-		    {
-			curwin->w_cursor.lnum = trypos->lnum + 1;
-			curwin->w_cursor.col = 0;
-		    }
-		    continue;
-		}
-
-		// Ignore jump labels with nothing after them.
-		if (!curbuf->b_ind_js && cin_islabel())
-		{
-		    l = after_label(ml_get_curline());
-		    if (l == NULL || cin_nocode(l))
-			continue;
-		}
-
-		// Ignore #defines, #if, etc.
-		// Ignore comment and empty lines.
-		// (need to get the line again, cin_islabel() may have
-		// unlocked it)
-		l = ml_get_curline();
-		if (cin_ispreproc_cont(&l, &curwin->w_cursor.lnum, &amount)
-							     || cin_nocode(l))
-		    continue;
-
-		// Are we at the start of a cpp base class declaration or
-		// constructor initialization?  XXX
-		n = FALSE;
-		if (lookfor != LOOKFOR_TERM && curbuf->b_ind_cpp_baseclass > 0)
-		{
-		    n = cin_is_cpp_baseclass(&cache_cpp_baseclass);
-		    l = ml_get_curline();
-		}
-		if (n)
-		{
-		    if (lookfor == LOOKFOR_UNTERM)
-		    {
-			if (cont_amount > 0)
-			    amount = cont_amount;
-			else
-			    amount += ind_continuation;
-		    }
-		    else if (theline[0] == '{')
-		    {
-			// Need to find start of the declaration.
-			lookfor = LOOKFOR_UNTERM;
-			ind_continuation = 0;
-			continue;
-		    }
-		    else
-			// XXX
-			amount = get_baseclass_amount(
-						cache_cpp_baseclass.lpos.col);
-		    break;
-		}
-		else if (lookfor == LOOKFOR_CPP_BASECLASS)
-		{
-		    // only look, whether there is a cpp base class
-		    // declaration or initialization before the opening brace.
-		    if (cin_isterminated(l, TRUE, FALSE))
-			break;
-		    else
-			continue;
-		}
-
-		// What happens next depends on the line being terminated.
-		// If terminated with a ',' only consider it terminating if
-		// there is another unterminated statement behind, eg:
-		//   123,
-		//   sizeof
-		//	  here
-		// Otherwise check whether it is a enumeration or structure
-		// initialisation (not indented) or a variable declaration
-		// (indented).
-		terminated = cin_isterminated(l, FALSE, TRUE);
-
-		if (js_cur_has_key)
-		{
-		    js_cur_has_key = 0; // only check the first line
-		    if (curbuf->b_ind_js && terminated == ',')
-		    {
-			// For Javascript we might be inside an object:
-			//   key: something,  <- align with this
-			//   key: something
-			// or:
-			//   key: something +  <- align with this
-			//       something,
-			//   key: something
-			lookfor = LOOKFOR_JS_KEY;
-		    }
-		}
-		if (lookfor == LOOKFOR_JS_KEY && cin_has_js_key(l))
-		{
-		    amount = get_indent();
-		    break;
-		}
-		if (lookfor == LOOKFOR_COMMA)
-		{
-		    if (tryposBrace != NULL && tryposBrace->lnum
-						    >= curwin->w_cursor.lnum)
-			break;
-		    if (terminated == ',')
-			// line below current line is the one that starts a
-			// (possibly broken) line ending in a comma.
-			break;
-		    else
-		    {
-			amount = get_indent();
-			if (curwin->w_cursor.lnum - 1 == ourscope)
-			    // line above is start of the scope, thus current
-			    // line is the one that stars a (possibly broken)
-			    // line ending in a comma.
-			    break;
-		    }
-		}
-
-		if (terminated == 0 || (lookfor != LOOKFOR_UNTERM
-							&& terminated == ','))
-		{
-		    if (lookfor != LOOKFOR_ENUM_OR_INIT &&
-			    (*skipwhite(l) == '[' || l[STRLEN(l) - 1] == '['))
-			amount += ind_continuation;
-		    // 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.
-		    // Ignore a match before the start of the block.
-		    (void)find_last_paren(l, '(', ')');
-		    trypos = find_match_paren(corr_ind_maxparen(&cur_curpos));
-		    if (trypos != NULL && (trypos->lnum < tryposBrace->lnum
-				|| (trypos->lnum == tryposBrace->lnum
-				    && trypos->col < tryposBrace->col)))
-			trypos = NULL;
-
-		    // If we are looking for ',', we also look for matching
-		    // braces.
-		    if (trypos == NULL && terminated == ','
-					      && find_last_paren(l, '{', '}'))
-			trypos = find_start_brace();
-
-		    if (trypos != NULL)
-		    {
-			// Check if we are on a case label now.  This is
-			// handled above.
-			//     case xx:  if ( asdf &&
-			//			asdf)
-			curwin->w_cursor = *trypos;
-			l = ml_get_curline();
-			if (cin_iscase(l, FALSE) || cin_isscopedecl(l))
-			{
-			    ++curwin->w_cursor.lnum;
-			    curwin->w_cursor.col = 0;
-			    continue;
-			}
-		    }
-
-		    /*
-		     * Skip over continuation lines to find the one to get the
-		     * indent from
-		     * char *usethis = "bla\
-		     *		 bla",
-		     *      here;
-		     */
-		    if (terminated == ',')
-		    {
-			while (curwin->w_cursor.lnum > 1)
-			{
-			    l = ml_get(curwin->w_cursor.lnum - 1);
-			    if (*l == NUL || l[STRLEN(l) - 1] != '\\')
-				break;
-			    --curwin->w_cursor.lnum;
-			    curwin->w_cursor.col = 0;
-			}
-		    }
-
-		    // Get indent and pointer to text for current line,
-		    // ignoring any jump label.  XXX
-		    if (curbuf->b_ind_js)
-			cur_amount = get_indent();
-		    else
-			cur_amount = skip_label(curwin->w_cursor.lnum, &l);
-		    // If this is just above the line we are indenting, and it
-		    // starts with a '{', line it up with this line.
-		    //		while (not)
-		    // ->	{
-		    //		}
-		    if (terminated != ',' && lookfor != LOOKFOR_TERM
-							 && theline[0] == '{')
-		    {
-			amount = cur_amount;
-			// Only add b_ind_open_extra when the current line
-			// doesn't start with a '{', which must have a match
-			// in the same line (scope is the same).  Probably:
-			//	{ 1, 2 },
-			// ->	{ 3, 4 }
-			if (*skipwhite(l) != '{')
-			    amount += curbuf->b_ind_open_extra;
-
-			if (curbuf->b_ind_cpp_baseclass && !curbuf->b_ind_js)
-			{
-			    // have to look back, whether it is a cpp base
-			    // class declaration or initialization
-			    lookfor = LOOKFOR_CPP_BASECLASS;
-			    continue;
-			}
-			break;
-		    }
-
-		    // Check if we are after an "if", "while", etc.
-		    // Also allow "   } else".
-		    if (cin_is_cinword(l) || cin_iselse(skipwhite(l)))
-		    {
-			// Found an unterminated line after an if (), line up
-			// with the last one.
-			//   if (cond)
-			//	    100 +
-			// ->		here;
-			if (lookfor == LOOKFOR_UNTERM
-					   || lookfor == LOOKFOR_ENUM_OR_INIT)
-			{
-			    if (cont_amount > 0)
-				amount = cont_amount;
-			    else
-				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 (theline[0] == '{')
-			    amount += curbuf->b_ind_open_extra;
-			if (lookfor != LOOKFOR_TERM)
-			{
-			    amount += curbuf->b_ind_level
-						     + curbuf->b_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 (cin_isdo(l))
-			{
-			    if (whilelevel == 0)
-				break;
-			    --whilelevel;
-			}
-
-			// When searching for a terminated line, don't use the
-			// one between the "if" and the matching "else".
-			// Need to use the scope of this "else".  XXX
-			// If whilelevel != 0 continue looking for a "do {".
-			if (cin_iselse(l) && whilelevel == 0)
+			tabstop_fromto(start_vcol, vcol,
+					curbuf->b_p_ts, new_vts_array, &t, &s);
+			num_tabs = t;
+			num_spaces = s;
+#else
+			temp = new_ts - (start_vcol % new_ts);
+			if (num_spaces >= temp)
 			{
-			    // If we're looking at "} else", let's make sure we
-			    // find the opening brace of the enclosing scope,
-			    // not the one from "if () {".
-			    if (*l == '}')
-				curwin->w_cursor.col =
-					  (colnr_T)(l - ml_get_curline()) + 1;
-
-			    if ((trypos = find_start_brace()) == NULL
-				       || find_match(LOOKFOR_IF, trypos->lnum)
-								      == FAIL)
-				break;
+			    num_spaces -= temp;
+			    num_tabs++;
 			}
+			num_tabs += num_spaces / new_ts;
+			num_spaces -= (num_spaces / new_ts) * new_ts;
+#endif
 		    }
-
-		    // If we're below an unterminated line that is not an
-		    // "if" or something, we may line up with this line or
-		    // add something for a continuation line, depending on
-		    // the line before this one.
-		    else
+		    if (curbuf->b_p_et || got_tab ||
+					(num_spaces + num_tabs < len))
 		    {
-			// Found two unterminated lines on a row, line up with
-			// the last one.
-			//   c = 99 +
-			//	    100 +
-			// ->	    here;
-			if (lookfor == LOOKFOR_UNTERM)
+			if (did_undo == FALSE)
 			{
-			    // When line ends in a comma add extra indent
-			    if (terminated == ',')
-				amount += ind_continuation;
-			    break;
-			}
-
-			if (lookfor == LOOKFOR_ENUM_OR_INIT)
-			{
-			    // Found two lines ending in ',', lineup with the
-			    // lowest one, but check for cpp base class
-			    // declaration/initialization, if it is an
-			    // opening brace or we are looking just for
-			    // enumerations/initializations.
-			    if (terminated == ',')
+			    did_undo = TRUE;
+			    if (u_save((linenr_T)(lnum - 1),
+						(linenr_T)(lnum + 1)) == FAIL)
 			    {
-				if (curbuf->b_ind_cpp_baseclass == 0)
-				    break;
-
-				lookfor = LOOKFOR_CPP_BASECLASS;
-				continue;
-			    }
-
-			    // Ignore unterminated lines in between, but
-			    // reduce indent.
-			    if (amount > cur_amount)
-				amount = cur_amount;
-			}
-			else
-			{
-			    // Found first unterminated line on a row, may
-			    // line up with this line, remember its indent
-			    //	    100 +
-			    // ->	    here;
-			    l = ml_get_curline();
-			    amount = cur_amount;
-
-			    n = (int)STRLEN(l);
-			    if (terminated == ',' && (*skipwhite(l) == ']'
-					|| (n >=2 && l[n - 2] == ']')))
+				new_line = NULL;	/* flag out-of-memory */
 				break;
-
-			    // If previous line ends in ',', check whether we
-			    // are in an initialization or enum
-			    // struct xxx =
-			    // {
-			    //      sizeof a,
-			    //      124 };
-			    // or a normal possible continuation line.
-			    // but only, of no other statement has been found
-			    // yet.
-			    if (lookfor == LOOKFOR_INITIAL && terminated == ',')
-			    {
-				if (curbuf->b_ind_js)
-				{
-				    // Search for a line ending in a comma
-				    // and line up with the line below it
-				    // (could be the current line).
-				    // some = [
-				    //     1,     <- line up here
-				    //     2,
-				    // some = [
-				    //     3 +    <- line up here
-				    //       4 *
-				    //        5,
-				    //     6,
-				    if (cin_iscomment(skipwhite(l)))
-					break;
-				    lookfor = LOOKFOR_COMMA;
-				    trypos = find_match_char('[',
-						      curbuf->b_ind_maxparen);
-				    if (trypos != NULL)
-				    {
-					if (trypos->lnum
-						 == curwin->w_cursor.lnum - 1)
-					{
-					    // Current line is first inside
-					    // [], line up with it.
-					    break;
-					}
-					ourscope = trypos->lnum;
-				    }
-				}
-				else
-				{
-				    lookfor = LOOKFOR_ENUM_OR_INIT;
-				    cont_amount = cin_first_id_amount();
-				}
 			    }
-			    else
-			    {
-				if (lookfor == LOOKFOR_INITIAL
-					&& *l != NUL
-					&& l[STRLEN(l) - 1] == '\\')
-								// XXX
-				    cont_amount = cin_get_equal_amount(
-						       curwin->w_cursor.lnum);
-				if (lookfor != LOOKFOR_TERM
-						&& lookfor != LOOKFOR_JS_KEY
-						&& lookfor != LOOKFOR_COMMA
-						&& raw_string_start != curwin->w_cursor.lnum)
-				    lookfor = LOOKFOR_UNTERM;
-			    }
-			}
-		    }
-		}
-
-		// Check if we are after a while (cond);
-		// If so: Ignore until the matching "do".
-		else if (cin_iswhileofdo_end(terminated)) // XXX
-		{
-		    // 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
-					   || lookfor == LOOKFOR_ENUM_OR_INIT)
-		    {
-			if (cont_amount > 0)
-			    amount = cont_amount;
-			else
-			    amount += ind_continuation;
-			break;
-		    }
-
-		    if (whilelevel == 0)
-		    {
-			lookfor = LOOKFOR_TERM;
-			amount = get_indent();	    // XXX
-			if (theline[0] == '{')
-			    amount += curbuf->b_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
-		{
-		    // Skip single break line, if before a switch label. It
-		    // may be lined up with the case label.
-		    if (lookfor == LOOKFOR_NOBREAK
-				  && cin_isbreak(skipwhite(ml_get_curline())))
-		    {
-			lookfor = LOOKFOR_ANY;
-			continue;
-		    }
-
-		    // Handle "do {" line.
-		    if (whilelevel > 0)
-		    {
-			l = cin_skipcomment(ml_get_curline());
-			if (cin_isdo(l))
-			{
-			    amount = get_indent();	// XXX
-			    --whilelevel;
-			    continue;
 			}
-		    }
 
-		    // Found a terminated line above an unterminated line. Add
-		    // the amount for a continuation line.
-		    //	 x = 1;
-		    //	 y = foo +
-		    // ->	here;
-		    // or
-		    //	 int x = 1;
-		    //	 int foo,
-		    // ->	here;
-		    if (lookfor == LOOKFOR_UNTERM
-					   || lookfor == LOOKFOR_ENUM_OR_INIT)
-		    {
-			if (cont_amount > 0)
-			    amount = cont_amount;
-			else
-			    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 (!lookfor_break && whilelevel == 0)
+			/* len is actual number of white characters used */
+			len = num_spaces + num_tabs;
+			old_len = (long)STRLEN(ptr);
+			new_line = alloc(old_len - col + start_col + len + 1);
+			if (new_line == NULL)
 			    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;
-term_again:
-			l = ml_get_curline();
-			if (find_last_paren(l, '(', ')')
-				&& (trypos = find_match_paren(
-					   curbuf->b_ind_maxparen)) != NULL)
-			{
-			    // Check if we are on a case label now.  This is
-			    // handled above.
-			    //	   case xx:  if ( asdf &&
-			    //			    asdf)
-			    curwin->w_cursor = *trypos;
-			    l = ml_get_curline();
-			    if (cin_iscase(l, FALSE) || cin_isscopedecl(l))
-			    {
-				++curwin->w_cursor.lnum;
-				curwin->w_cursor.col = 0;
-				continue;
-			    }
-			}
-
-			// When aligning with the case statement, don't align
-			// with a statement after it.
-			//  case 1: {   <-- don't use this { position
-			//	stat;
-			//  }
-			//  case 2:
-			//	stat;
-			// }
-			iscase = (curbuf->b_ind_keep_case_label
-						     && cin_iscase(l, FALSE));
-
-			// Get indent and pointer to text for current line,
-			// ignoring any jump label.
-			amount = skip_label(curwin->w_cursor.lnum, &l);
-
-			if (theline[0] == '{')
-			    amount += curbuf->b_ind_open_extra;
-			// See remark above: "Only add b_ind_open_extra.."
-			l = skipwhite(l);
-			if (*l == '{')
-			    amount -= curbuf->b_ind_open_extra;
-			lookfor = iscase ? LOOKFOR_ANY : LOOKFOR_TERM;
-
-			// When a terminated line starts with "else" skip to
-			// the matching "if":
-			//       else 3;
-			//	     indent this;
-			// Need to use the scope of this "else".  XXX
-			// If whilelevel != 0 continue looking for a "do {".
-			if (lookfor == LOOKFOR_TERM
-				&& *l != '}'
-				&& cin_iselse(l)
-				&& whilelevel == 0)
-			{
-			    if ((trypos = find_start_brace()) == NULL
-				       || find_match(LOOKFOR_IF, trypos->lnum)
-								      == FAIL)
-				break;
-			    continue;
-			}
-
-			// If we're at the end of a block, skip to the start of
-			// that block.
-			l = ml_get_curline();
-			if (find_last_paren(l, '{', '}') // XXX
-				     && (trypos = find_start_brace()) != NULL)
-			{
-			    curwin->w_cursor = *trypos;
-			    // if not "else {" check for terminated again
-			    // but skip block for "} else {"
-			    l = cin_skipcomment(ml_get_curline());
-			    if (*l == '}' || !cin_iselse(l))
-				goto term_again;
-			    ++curwin->w_cursor.lnum;
-			    curwin->w_cursor.col = 0;
-			}
+			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;
 	    }
-	}
-      }
-
-      // add extra indent for a comment
-      if (cin_iscomment(theline))
-	  amount += curbuf->b_ind_comment;
-
-      // subtract extra left-shift for jump labels
-      if (curbuf->b_ind_jump_label > 0 && original_line_islabel)
-	  amount -= curbuf->b_ind_jump_label;
-
-      goto theend;
-    }
-
-    // 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.
-    //
-    // 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 = curbuf->b_ind_first_open;
-	goto theend;
-    }
-
-    // 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 or if the
-    // current line is terminated, ie. ends in ';', or if the current line
-    // contains { or }: "void f() {\n if (1)"
-    if (cur_curpos.lnum < curbuf->b_ml.ml_line_count
-	    && !cin_nocode(theline)
-	    && vim_strchr(theline, '{') == NULL
-	    && vim_strchr(theline, '}') == NULL
-	    && !cin_ends_in(theline, (char_u *)":", NULL)
-	    && !cin_ends_in(theline, (char_u *)",", NULL)
-	    && cin_isfuncdecl(NULL, cur_curpos.lnum + 1,
-			      cur_curpos.lnum + 1)
-	    && !cin_isterminated(theline, FALSE, TRUE))
-    {
-	amount = curbuf->b_ind_func_type;
-	goto theend;
-    }
-
-    // search backwards until we find something we recognize
-    amount = 0;
-    curwin->w_cursor = cur_curpos;
-    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 or raw string now, skip to the start
-	// of it.  XXX
-	if ((trypos = ind_find_start_CORS(NULL)) != NULL)
-	{
-	    curwin->w_cursor.lnum = trypos->lnum + 1;
-	    curwin->w_cursor.col = 0;
-	    continue;
-	}
-
-	// Are we at the start of a cpp base class declaration or
-	// constructor initialization?  XXX
-	n = FALSE;
-	if (curbuf->b_ind_cpp_baseclass != 0 && theline[0] != '{')
-	{
-	    n = cin_is_cpp_baseclass(&cache_cpp_baseclass);
-	    l = ml_get_curline();
-	}
-	if (n)
-	{
-							     // XXX
-	    amount = get_baseclass_amount(cache_cpp_baseclass.lpos.col);
-	    break;
-	}
-
-	// Skip preprocessor directives and blank lines.
-	if (cin_ispreproc_cont(&l, &curwin->w_cursor.lnum, &amount))
-	    continue;
-
-	if (cin_nocode(l))
-	    continue;
-
-	// If the previous line ends in ',', use one level of
-	// indentation:
-	// int foo,
-	//     bar;
-	// do this before checking for '}' in case of eg.
-	// enum foobar
-	// {
-	//   ...
-	// } foo,
-	//   bar;
-	n = 0;
-	if (cin_ends_in(l, (char_u *)",", NULL)
-		     || (*l != NUL && (n = l[STRLEN(l) - 1]) == '\\'))
-	{
-	    // take us back to opening paren
-	    if (find_last_paren(l, '(', ')')
-		    && (trypos = find_match_paren(
-				     curbuf->b_ind_maxparen)) != NULL)
-		curwin->w_cursor = *trypos;
-
-	    /*
-	     * For a line ending in ',' that is a continuation line go
-	     * back to the first line with a backslash:
-	     * char *foo = "bla\
-	     *		 bla",
-	     *      here;
-	     */
-	    while (n == 0 && curwin->w_cursor.lnum > 1)
-	    {
-		l = ml_get(curwin->w_cursor.lnum - 1);
-		if (*l == NUL || l[STRLEN(l) - 1] != '\\')
-		    break;
-		--curwin->w_cursor.lnum;
-		curwin->w_cursor.col = 0;
-	    }
-
-	    amount = get_indent();	    // XXX
-
-	    if (amount == 0)
-		amount = cin_first_id_amount();
-	    if (amount == 0)
-		amount = ind_continuation;
-	    break;
-	}
-
-	// If the line looks like a function declaration, and we're
-	// not in a comment, put it the left margin.
-	if (cin_isfuncdecl(NULL, cur_curpos.lnum, 0))  // XXX
-	    break;
-	l = ml_get_curline();
-
-	// Finding the closing '}' of a previous function.  Put
-	// current line at the left margin.  For when 'cino' has "fs".
-	if (*skipwhite(l) == '}')
-	    break;
-
-	//			    (matching {)
-	// If the previous line ends on '};' (maybe followed by
-	// comments) align at column 0.  For example:
-	// char *string_array[] = { "foo",
-	//     / * x * / "b};ar" }; / * foobar * /
-	if (cin_ends_in(l, (char_u *)"};", NULL))
-	    break;
-
-	// If the previous line ends on '[' we are probably in an
-	// array constant:
-	// something = [
-	//     234,  <- extra indent
-	if (cin_ends_in(l, (char_u *)"[", NULL))
-	{
-	    amount = get_indent() + ind_continuation;
-	    break;
-	}
-
-	// Find a line only has a semicolon that belongs to a previous
-	// line ending in '}', e.g. before an #endif.  Don't increase
-	// indent then.
-	if (*(look = skipwhite(l)) == ';' && cin_nocode(look + 1))
-	{
-	    pos_T curpos_save = curwin->w_cursor;
-
-	    while (curwin->w_cursor.lnum > 1)
-	    {
-		look = ml_get(--curwin->w_cursor.lnum);
-		if (!(cin_nocode(look) || cin_ispreproc_cont(
-				      &look, &curwin->w_cursor.lnum, &amount)))
-		    break;
-	    }
-	    if (curwin->w_cursor.lnum > 0
-			    && cin_ends_in(look, (char_u *)"}", NULL))
+	    if (ptr[col] == NUL)
 		break;
-
-	    curwin->w_cursor = curpos_save;
+	    vcol += chartabsize(ptr + col, (colnr_T)vcol);
+	    if (has_mbyte)
+		col += (*mb_ptr2len)(ptr + col);
+	    else
+		++col;
 	}
-
-	// If the PREVIOUS line is a function declaration, the current
-	// line (and the ones that follow) needs to be indented as
-	// parameters.
-	if (cin_isfuncdecl(&l, curwin->w_cursor.lnum, 0))
-	{
-	    amount = curbuf->b_ind_param;
+	if (new_line == NULL)		    /* out of memory */
 	    break;
-	}
-
-	// If the previous line ends in ';' and the line before the
-	// previous line ends in ',' or '\', ident to column zero:
-	// int foo,
-	//     bar;
-	// indent_to_0 here;
-	if (cin_ends_in(l, (char_u *)";", NULL))
-	{
-	    l = ml_get(curwin->w_cursor.lnum - 1);
-	    if (cin_ends_in(l, (char_u *)",", NULL)
-		    || (*l != NUL && l[STRLEN(l) - 1] == '\\'))
-		break;
-	    l = ml_get_curline();
-	}
-
-	// 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(curbuf->b_ind_maxparen)) != NULL)
-	    curwin->w_cursor = *trypos;
-	amount = get_indent();	    // XXX
-	break;
-    }
-
-    // add extra indent for a comment
-    if (cin_iscomment(theline))
-	amount += curbuf->b_ind_comment;
-
-    /*
-     * add extra indent if the previous line ended in a backslash:
-     *	      "asdfasdf\
-     *		  here";
-     *	    char *foo = "asdf\
-     *			 here";
-     */
-    if (cur_curpos.lnum > 1)
-    {
-	l = ml_get(cur_curpos.lnum - 1);
-	if (*l != NUL && l[STRLEN(l) - 1] == '\\')
-	{
-	    cur_amount = cin_get_equal_amount(cur_curpos.lnum - 1);
-	    if (cur_amount > 0)
-		amount = cur_amount;
-	    else if (cur_amount == 0)
-		amount += ind_continuation;
-	}
-    }
-
-theend:
-    if (amount < 0)
-	amount = 0;
-
-laterend:
-    // put the cursor back where it belongs
-    curwin->w_cursor = cur_curpos;
-
-    vim_free(linecopy);
-
-    return amount;
-}
-
-    static int
-find_match(int lookfor, linenr_T ourscope)
-{
-    char_u	*look;
-    pos_T	*theirscope;
-    char_u	*mightbeif;
-    int		elselevel;
-    int		whilelevel;
-
-    if (lookfor == LOOKFOR_IF)
-    {
-	elselevel = 1;
-	whilelevel = 0;
-    }
+	line_breakcheck();
+    }
+    if (got_int)
+	emsg(_(e_interr));
+
+#ifdef FEAT_VARTABS
+    // If a single value was given then it can be considered equal to
+    // either the value of 'tabstop' or the value of 'vartabstop'.
+    if (tabstop_count(curbuf->b_p_vts_array) == 0
+	&& tabstop_count(new_vts_array) == 1
+	&& curbuf->b_p_ts == tabstop_first(new_vts_array))
+	; /* not changed */
+    else if (tabstop_count(curbuf->b_p_vts_array) > 0
+        && tabstop_eq(curbuf->b_p_vts_array, new_vts_array))
+	; /* not changed */
     else
-    {
-	elselevel = 0;
-	whilelevel = 1;
-    }
+	redraw_curbuf_later(NOT_VALID);
+#else
+    if (curbuf->b_p_ts != new_ts)
+	redraw_curbuf_later(NOT_VALID);
+#endif
+    if (first_line != 0)
+	changed_lines(first_line, 0, last_line + 1, 0L);
 
-    curwin->w_cursor.col = 0;
+    curwin->w_p_list = save_list;	/* restore 'list' */
 
-    while (curwin->w_cursor.lnum > ourscope + 1)
+#ifdef FEAT_VARTABS
+    if (new_ts_str != NULL)		/* set the new tabstop */
     {
-	curwin->w_cursor.lnum--;
-	curwin->w_cursor.col = 0;
+	// If 'vartabstop' is in use or if the value given to retab has more
+	// than one tabstop then update 'vartabstop'.
+	int *old_vts_ary = curbuf->b_p_vts_array;
 
-	look = cin_skipcomment(ml_get_curline());
-	if (cin_iselse(look)
-		|| cin_isif(look)
-		|| cin_isdo(look)			    // XXX
-		|| cin_iswhileofdo(look, curwin->w_cursor.lnum))
+	if (tabstop_count(old_vts_ary) > 0 || tabstop_count(new_vts_array) > 1)
 	{
-	    // if we've gone outside the braces entirely,
-	    // we must be out of scope...
-	    theirscope = find_start_brace();  // 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 = cin_skipcomment(ml_get_curline());
-	    if (cin_iselse(look))
-	    {
-		mightbeif = cin_skipcomment(look + 4);
-		if (!cin_isif(mightbeif))
-		    ++elselevel;
-		continue;
-	    }
-
-	    // if it was a "while" then we need to go back to
-	    // another "do", so increment whilelevel.  XXX
-	    if (cin_iswhileofdo(look, curwin->w_cursor.lnum))
-	    {
-		++whilelevel;
-		continue;
-	    }
-
-	    // If it's an "if" decrement elselevel
-	    look = cin_skipcomment(ml_get_curline());
-	    if (cin_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 (cin_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;
+	    set_string_option_direct((char_u *)"vts", -1, new_ts_str,
+							OPT_FREE|OPT_LOCAL, 0);
+	    curbuf->b_p_vts_array = new_vts_array;
+	    vim_free(old_vts_ary);
+	}
+	else
+	{
+	    // 'vartabstop' wasn't in use and a single value was given to
+	    // retab then update 'tabstop'.
+	    curbuf->b_p_ts = tabstop_first(new_vts_array);
+	    vim_free(new_vts_array);
 	}
+	vim_free(new_ts_str);
     }
-    return FAIL;
+#else
+    curbuf->b_p_ts = new_ts;
+#endif
+    coladvance(curwin->w_curswant);
+
+    u_clearline();
 }
 
-# if defined(FEAT_EVAL) || defined(PROTO)
+#if (defined(FEAT_CINDENT) && defined(FEAT_EVAL)) || defined(PROTO)
 /*
  * Get indent level from 'indentexpr'.
  */
@@ -3935,252 +1745,7 @@ get_expr_indent(void)
 
     return indent;
 }
-# endif
-
-/*
- * return TRUE if 'cinkeys' contains the key "keytyped",
- * when == '*':	    Only if key is preceded with '*'	(indent before insert)
- * when == '!':	    Only if key is preceded with '!'	(don't insert)
- * when == ' ':	    Only if key is not preceded with '*'(indent afterwards)
- *
- * "keytyped" can have a few special values:
- * KEY_OPEN_FORW
- * KEY_OPEN_BACK
- * KEY_COMPLETE	    just finished completion.
- *
- * If line_is_empty is TRUE accept keys with '0' before them.
- */
-    int
-in_cinkeys(
-    int		keytyped,
-    int		when,
-    int		line_is_empty)
-{
-    char_u	*look;
-    int		try_match;
-    int		try_match_word;
-    char_u	*p;
-    char_u	*line;
-    int		icase;
-    int		i;
-
-    if (keytyped == NUL)
-	// Can happen with CTRL-Y and CTRL-E on a short line.
-	return FALSE;
-
-#ifdef FEAT_EVAL
-    if (*curbuf->b_p_inde != NUL)
-	look = curbuf->b_p_indk;	// 'indentexpr' set: use 'indentkeys'
-    else
-#endif
-	look = curbuf->b_p_cink;	// 'indentexpr' empty: use 'cinkeys'
-    while (*look)
-    {
-	// Find out if we want to try a match with this key, depending on
-	// 'when' and a '*' or '!' before the key.
-	switch (when)
-	{
-	    case '*': try_match = (*look == '*'); break;
-	    case '!': try_match = (*look == '!'); break;
-	     default: try_match = (*look != '*'); break;
-	}
-	if (*look == '*' || *look == '!')
-	    ++look;
-
-	// If there is a '0', only accept a match if the line is empty.
-	// But may still match when typing last char of a word.
-	if (*look == '0')
-	{
-	    try_match_word = try_match;
-	    if (!line_is_empty)
-		try_match = FALSE;
-	    ++look;
-	}
-	else
-	    try_match_word = FALSE;
-
-	// does it look like a control character?
-	if (*look == '^'
-#ifdef EBCDIC
-		&& (Ctrl_chr(look[1]) != 0)
-#else
-		&& look[1] >= '?' && look[1] <= '_'
 #endif
-		)
-	{
-	    if (try_match && keytyped == Ctrl_chr(look[1]))
-		return TRUE;
-	    look += 2;
-	}
-	// 'o' means "o" command, open forward.
-	// 'O' means "O" command, open backward.
-	else if (*look == 'o')
-	{
-	    if (try_match && keytyped == KEY_OPEN_FORW)
-		return TRUE;
-	    ++look;
-	}
-	else if (*look == 'O')
-	{
-	    if (try_match && keytyped == KEY_OPEN_BACK)
-		return TRUE;
-	    ++look;
-	}
-
-	// 'e' means to check for "else" at start of line and just before the
-	// cursor.
-	else if (*look == 'e')
-	{
-	    if (try_match && keytyped == 'e' && curwin->w_cursor.col >= 4)
-	    {
-		p = ml_get_curline();
-		if (skipwhite(p) == p + curwin->w_cursor.col - 4 &&
-			STRNCMP(p + curwin->w_cursor.col - 4, "else", 4) == 0)
-		    return TRUE;
-	    }
-	    ++look;
-	}
-
-	// ':' only causes an indent if it is at the end of a label or case
-	// statement, or when it was before typing the ':' (to fix
-	// class::method for C++).
-	else if (*look == ':')
-	{
-	    if (try_match && keytyped == ':')
-	    {
-		p = ml_get_curline();
-		if (cin_iscase(p, FALSE) || cin_isscopedecl(p) || cin_islabel())
-		    return TRUE;
-		// Need to get the line again after cin_islabel().
-		p = ml_get_curline();
-		if (curwin->w_cursor.col > 2
-			&& p[curwin->w_cursor.col - 1] == ':'
-			&& p[curwin->w_cursor.col - 2] == ':')
-		{
-		    p[curwin->w_cursor.col - 1] = ' ';
-		    i = (cin_iscase(p, FALSE) || cin_isscopedecl(p)
-							    || cin_islabel());
-		    p = ml_get_curline();
-		    p[curwin->w_cursor.col - 1] = ':';
-		    if (i)
-			return TRUE;
-		}
-	    }
-	    ++look;
-	}
-
-
-	// Is it a key in <>, maybe?
-	else if (*look == '<')
-	{
-	    if (try_match)
-	    {
-		// make up some named keys <o>, <O>, <e>, <0>, <>>, <<>, <*>,
-		// <:> and <!> so that people can re-indent on o, O, e, 0, <,
-		// >, *, : and ! keys if they really really want to.
-		if (vim_strchr((char_u *)"<>!*oOe0:", look[1]) != NULL
-						       && keytyped == look[1])
-		    return TRUE;
-
-		if (keytyped == get_special_key_code(look + 1))
-		    return TRUE;
-	    }
-	    while (*look && *look != '>')
-		look++;
-	    while (*look == '>')
-		look++;
-	}
-
-	// Is it a word: "=word"?
-	else if (*look == '=' && look[1] != ',' && look[1] != NUL)
-	{
-	    ++look;
-	    if (*look == '~')
-	    {
-		icase = TRUE;
-		++look;
-	    }
-	    else
-		icase = FALSE;
-	    p = vim_strchr(look, ',');
-	    if (p == NULL)
-		p = look + STRLEN(look);
-	    if ((try_match || try_match_word)
-		    && curwin->w_cursor.col >= (colnr_T)(p - look))
-	    {
-		int		match = FALSE;
-
-		if (keytyped == KEY_COMPLETE)
-		{
-		    char_u	*s;
-
-		    // Just completed a word, check if it starts with "look".
-		    // search back for the start of a word.
-		    line = ml_get_curline();
-		    if (has_mbyte)
-		    {
-			char_u	*n;
-
-			for (s = line + curwin->w_cursor.col; s > line; s = n)
-			{
-			    n = mb_prevptr(line, s);
-			    if (!vim_iswordp(n))
-				break;
-			}
-		    }
-		    else
-			for (s = line + curwin->w_cursor.col; s > line; --s)
-			    if (!vim_iswordc(s[-1]))
-				break;
-		    if (s + (p - look) <= line + curwin->w_cursor.col
-			    && (icase
-				? MB_STRNICMP(s, look, p - look)
-				: STRNCMP(s, look, p - look)) == 0)
-			match = TRUE;
-		}
-		else
-		    // TODO: multi-byte
-		    if (keytyped == (int)p[-1] || (icase && keytyped < 256
-			 && TOLOWER_LOC(keytyped) == TOLOWER_LOC((int)p[-1])))
-		{
-		    line = ml_get_cursor();
-		    if ((curwin->w_cursor.col == (colnr_T)(p - look)
-				|| !vim_iswordc(line[-(p - look) - 1]))
-			    && (icase
-				? MB_STRNICMP(line - (p - look), look, p - look)
-				: STRNCMP(line - (p - look), look, p - look))
-									 == 0)
-			match = TRUE;
-		}
-		if (match && try_match_word && !try_match)
-		{
-		    // "0=word": Check if there are only blanks before the
-		    // word.
-		    if (getwhitecols_curline() !=
-				     (int)(curwin->w_cursor.col - (p - look)))
-			match = FALSE;
-		}
-		if (match)
-		    return TRUE;
-	    }
-	    look = p;
-	}
-
-	// ok, it's a boring generic character.
-	else
-	{
-	    if (try_match && *look == keytyped)
-		return TRUE;
-	    if (*look != NUL)
-		++look;
-	}
-
-	// Skip over ", ".
-	look = skip_to_option_part(look);
-    }
-    return FALSE;
-}
-#endif // FEAT_CINDENT
 
 #if defined(FEAT_LISP) || defined(PROTO)
 
@@ -4401,22 +1966,6 @@ get_lisp_indent(void)
 }
 #endif // FEAT_LISP
 
-#if defined(FEAT_CINDENT) || defined(PROTO)
-/*
- * Do C or expression indenting on the current line.
- */
-    void
-do_c_expr_indent(void)
-{
-# ifdef FEAT_EVAL
-    if (*curbuf->b_p_inde != NUL)
-	fixthisline(get_expr_indent);
-    else
-# endif
-	fixthisline(get_c_indent);
-}
-#endif
-
 #if defined(FEAT_LISP) || defined(FEAT_CINDENT) || defined(PROTO)
 /*
  * Re-indent the current line, based on the current contents of it and the
@@ -4455,363 +2004,44 @@ fix_indent(void)
 	    do_c_expr_indent();
 # endif
 }
-
 #endif
 
-#if defined(FEAT_VARTABS) || defined(PROTO)
-
-/*
- * Set the integer values corresponding to the string setting of 'vartabstop'.
- * "array" will be set, caller must free it if needed.
- */
-    int
-tabstop_set(char_u *var, int **array)
-{
-    int valcount = 1;
-    int t;
-    char_u *cp;
-
-    if (var[0] == NUL || (var[0] == '0' && var[1] == NUL))
-    {
-	*array = NULL;
-	return TRUE;
-    }
-
-    for (cp = var; *cp != NUL; ++cp)
-    {
-	if (cp == var || cp[-1] == ',')
-	{
-	    char_u *end;
-
-	    if (strtol((char *)cp, (char **)&end, 10) <= 0)
-	    {
-		if (cp != end)
-		    emsg(_(e_positive));
-		else
-		    emsg(_(e_invarg));
-		return FALSE;
-	    }
-	}
-
-	if (VIM_ISDIGIT(*cp))
-	    continue;
-	if (cp[0] == ',' && cp > var && cp[-1] != ',' && cp[1] != NUL)
-	{
-	    ++valcount;
-	    continue;
-	}
-	emsg(_(e_invarg));
-	return FALSE;
-    }
-
-    *array = ALLOC_MULT(int, valcount + 1);
-    if (*array == NULL)
-	return FALSE;
-    (*array)[0] = valcount;
-
-    t = 1;
-    for (cp = var; *cp != NUL;)
-    {
-	(*array)[t++] = atoi((char *)cp);
-	while (*cp  != NUL && *cp != ',')
-	    ++cp;
-	if (*cp != NUL)
-	    ++cp;
-    }
-
-    return TRUE;
-}
-
-/*
- * Calculate the number of screen spaces a tab will occupy.
- * If "vts" is set then the tab widths are taken from that array,
- * otherwise the value of ts is used.
- */
-    int
-tabstop_padding(colnr_T col, int ts_arg, int *vts)
-{
-    int		ts = ts_arg == 0 ? 8 : ts_arg;
-    int		tabcount;
-    colnr_T	tabcol = 0;
-    int		t;
-    int		padding = 0;
-
-    if (vts == NULL || vts[0] == 0)
-	return ts - (col % ts);
-
-    tabcount = vts[0];
-
-    for (t = 1; t <= tabcount; ++t)
-    {
-	tabcol += vts[t];
-	if (tabcol > col)
-	{
-	    padding = (int)(tabcol - col);
-	    break;
-	}
-    }
-    if (t > tabcount)
-	padding = vts[tabcount] - (int)((col - tabcol) % vts[tabcount]);
-
-    return padding;
-}
-
-/*
- * Find the size of the tab that covers a particular column.
- */
-    int
-tabstop_at(colnr_T col, int ts, int *vts)
-{
-    int		tabcount;
-    colnr_T	tabcol = 0;
-    int		t;
-    int		tab_size = 0;
-
-    if (vts == 0 || vts[0] == 0)
-	return ts;
-
-    tabcount = vts[0];
-    for (t = 1; t <= tabcount; ++t)
-    {
-	tabcol += vts[t];
-	if (tabcol > col)
-	{
-	    tab_size = vts[t];
-	    break;
-	}
-    }
-    if (t > tabcount)
-	tab_size = vts[tabcount];
-
-    return tab_size;
-}
-
+#if defined(FEAT_EVAL) || defined(PROTO)
 /*
- * Find the column on which a tab starts.
+ * "indent()" function
  */
-    colnr_T
-tabstop_start(colnr_T col, int ts, int *vts)
+    void
+f_indent(typval_T *argvars, typval_T *rettv)
 {
-    int		tabcount;
-    colnr_T	tabcol = 0;
-    int		t;
-    int         excess;
-
-    if (vts == NULL || vts[0] == 0)
-	return (col / ts) * ts;
-
-    tabcount = vts[0];
-    for (t = 1; t <= tabcount; ++t)
-    {
-	tabcol += vts[t];
-	if (tabcol > col)
-	    return tabcol - vts[t];
-    }
+    linenr_T	lnum;
 
-    excess = tabcol % vts[tabcount];
-    return excess + ((col - excess) / vts[tabcount]) * vts[tabcount];
+    lnum = tv_get_lnum(argvars);
+    if (lnum >= 1 && lnum <= curbuf->b_ml.ml_line_count)
+	rettv->vval.v_number = get_indent_lnum(lnum);
+    else
+	rettv->vval.v_number = -1;
 }
 
 /*
- * Find the number of tabs and spaces necessary to get from one column
- * to another.
+ * "lispindent(lnum)" function
  */
     void
-tabstop_fromto(
-	colnr_T start_col,
-	colnr_T end_col,
-	int	ts_arg,
-	int	*vts,
-	int	*ntabs,
-	int	*nspcs)
+f_lispindent(typval_T *argvars UNUSED, typval_T *rettv)
 {
-    int		spaces = end_col - start_col;
-    colnr_T	tabcol = 0;
-    int		padding = 0;
-    int		tabcount;
-    int		t;
-    int		ts = ts_arg == 0 ? curbuf->b_p_ts : ts_arg;
-
-    if (vts == NULL || vts[0] == 0)
-    {
-	int tabs = 0;
-	int initspc = 0;
-
-	initspc = ts - (start_col % ts);
-	if (spaces >= initspc)
-	{
-	    spaces -= initspc;
-	    tabs++;
-	}
-	tabs += spaces / ts;
-	spaces -= (spaces / ts) * ts;
-
-	*ntabs = tabs;
-	*nspcs = spaces;
-	return;
-    }
-
-    // Find the padding needed to reach the next tabstop.
-    tabcount = vts[0];
-    for (t = 1; t <= tabcount; ++t)
-    {
-	tabcol += vts[t];
-	if (tabcol > start_col)
-	{
-	    padding = (int)(tabcol - start_col);
-	    break;
-	}
-    }
-    if (t > tabcount)
-	padding = vts[tabcount] - (int)((start_col - tabcol) % vts[tabcount]);
-
-    // If the space needed is less than the padding no tabs can be used.
-    if (spaces < padding)
-    {
-	*ntabs = 0;
-	*nspcs = spaces;
-	return;
-    }
-
-    *ntabs = 1;
-    spaces -= padding;
+#ifdef FEAT_LISP
+    pos_T	pos;
+    linenr_T	lnum;
 
-    // At least one tab has been used. See if any more will fit.
-    while (spaces != 0 && ++t <= tabcount)
+    pos = curwin->w_cursor;
+    lnum = tv_get_lnum(argvars);
+    if (lnum >= 1 && lnum <= curbuf->b_ml.ml_line_count)
     {
-	padding = vts[t];
-	if (spaces < padding)
-	{
-	    *nspcs = spaces;
-	    return;
-	}
-	++*ntabs;
-	spaces -= padding;
+	curwin->w_cursor.lnum = lnum;
+	rettv->vval.v_number = get_lisp_indent();
+	curwin->w_cursor = pos;
     }
-
-    *ntabs += spaces / vts[tabcount];
-    *nspcs =  spaces % vts[tabcount];
-}
-
-/*
- * See if two tabstop arrays contain the same values.
- */
-    int
-tabstop_eq(int *ts1, int *ts2)
-{
-    int		t;
-
-    if ((ts1 == 0 && ts2) || (ts1 && ts2 == 0))
-	return FALSE;
-    if (ts1 == ts2)
-	return TRUE;
-    if (ts1[0] != ts2[0])
-	return FALSE;
-
-    for (t = 1; t <= ts1[0]; ++t)
-	if (ts1[t] != ts2[t])
-	    return FALSE;
-
-    return TRUE;
-}
-
-#if defined(FEAT_BEVAL) || defined(PROTO)
-/*
- * Copy a tabstop array, allocating space for the new array.
- */
-    int *
-tabstop_copy(int *oldts)
-{
-    int		*newts;
-    int		t;
-
-    if (oldts == NULL)
-	return NULL;
-    newts = ALLOC_MULT(int, oldts[0] + 1);
-    if (newts != NULL)
-	for (t = 0; t <= oldts[0]; ++t)
-	    newts[t] = oldts[t];
-    return newts;
-}
+    else
 #endif
-
-/*
- * Return a count of the number of tabstops.
- */
-    int
-tabstop_count(int *ts)
-{
-    return ts != NULL ? ts[0] : 0;
-}
-
-/*
- * Return the first tabstop, or 8 if there are no tabstops defined.
- */
-    int
-tabstop_first(int *ts)
-{
-    return ts != NULL ? ts[1] : 8;
+	rettv->vval.v_number = -1;
 }
-
 #endif
-
-/*
- * Return the effective shiftwidth value for current buffer, using the
- * 'tabstop' value when 'shiftwidth' is zero.
- */
-    long
-get_sw_value(buf_T *buf)
-{
-    return get_sw_value_col(buf, 0);
-}
-
-/*
- * Idem, using "pos".
- */
-    static long
-get_sw_value_pos(buf_T *buf, pos_T *pos)
-{
-    pos_T save_cursor = curwin->w_cursor;
-    long sw_value;
-
-    curwin->w_cursor = *pos;
-    sw_value = get_sw_value_col(buf, get_nolist_virtcol());
-    curwin->w_cursor = save_cursor;
-    return sw_value;
-}
-
-/*
- * Idem, using the first non-black in the current line.
- */
-    long
-get_sw_value_indent(buf_T *buf)
-{
-    pos_T pos = curwin->w_cursor;
-
-    pos.col = getwhitecols_curline();
-    return get_sw_value_pos(buf, &pos);
-}
-
-/*
- * Idem, using virtual column "col".
- */
-    long
-get_sw_value_col(buf_T *buf, colnr_T col UNUSED)
-{
-    return buf->b_p_sw ? buf->b_p_sw :
- #ifdef FEAT_VARTABS
-	tabstop_at(col, buf->b_p_ts, buf->b_p_vts_array);
- #else
-	buf->b_p_ts;
- #endif
-}
-
-/*
- * Return the effective softtabstop value for the current buffer, using the
- * 'shiftwidth' value when 'softtabstop' is negative.
- */
-    long
-get_sts_value(void)
-{
-    return curbuf->b_p_sts < 0 ? get_sw_value(curbuf) : curbuf->b_p_sts;
-}