Patch 8.1.1318
Problem:    Code for text changes is in a "misc" file.
Solution:   Move the code to change.c.
Files:      src/misc1.c, src/proto/misc1.pro, src/change.c,
            src/proto/change.pro, src/proto.h, src/memline.c, Filelist,
            src/Make_cyg_ming.mak, src/Make_dice.mak, src/Make_manx.mak,
            src/Make_morph.mak, src/Make_mvc.mak, src/Make_sas.mak,
            src/Make_vms.mms, src/Makefile, src/README.md


*** ../vim-8.1.1317/src/misc1.c 2019-05-09 15:12:45.172723940 +0200
--- src/misc1.c 2019-05-11 16:57:09.876376738 +0200
***************
*** 447,597 ****
  }
  
  /*
-  * 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.
-  */
-     static 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
- 
-     /* 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)
-           {
- #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
-           }
-           else
-           {
-               --todo;
-               ++ind_done;
- #ifdef FEAT_VARTABS
-               ++ind_col;
- #endif
-           }
-           ++ind_len;
-           if (p != NULL)
-               *p++ = *s;
-           ++s;
-       }
- 
-       /* 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 (;;)
-           {
-               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
-           while (todo >= (int)curbuf->b_p_ts)
-           {
-               todo -= (int)curbuf->b_p_ts;
-               ++ind_len;
-               if (p != NULL)
-                   *p++ = TAB;
-           }
- #endif
-       }
- 
-       /* Count/add spaces required for indent */
-       while (todo > 0)
-       {
-           --todo;
-           ++ind_len;
-           if (p != NULL)
-               *p++ = ' ';
-       }
- 
-       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;
-       }
-     }
- 
-     /* Append the original line */
-     mch_memmove(p, ml_get_curline(), (size_t)line_len);
- 
-     /* Replace the line */
-     ml_replace(curwin->w_cursor.lnum, line, FALSE);
- 
-     /* Put the cursor after the indent. */
-     curwin->w_cursor.col = ind_len;
-     return TRUE;
- }
- 
- /*
   * 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.
--- 447,452 ----
***************
*** 704,1763 ****
  }
  #endif
  
- 
- /*
-  * open_line: Add a new line below or above the current line.
-  *
-  * For VREPLACE mode, we only add a new line when we get to the end of the
-  * file, otherwise we just start replacing the next line.
-  *
-  * Caller must take care of undo.  Since VREPLACE may affect any number of
-  * lines however, it may call u_save_cursor() again when starting to change a
-  * new line.
-  * "flags": OPENLINE_DELSPACES        delete spaces after cursor
-  *        OPENLINE_DO_COM     format comments
-  *        OPENLINE_KEEPTRAIL  keep trailing spaces
-  *        OPENLINE_MARKFIX    adjust mark positions after the line break
-  *        OPENLINE_COM_LIST   format comments with list or 2nd line indent
-  *
-  * "second_line_indent": indent for after ^^D in Insert mode or if flag
-  *                      OPENLINE_COM_LIST
-  *
-  * Return OK for success, FAIL for failure
-  */
-     int
- open_line(
-     int               dir,            /* FORWARD or BACKWARD */
-     int               flags,
-     int               second_line_indent)
- {
-     char_u    *saved_line;            /* copy of the original line */
-     char_u    *next_line = NULL;      /* copy of the next line */
-     char_u    *p_extra = NULL;        /* what goes to next line */
-     int               less_cols = 0;          /* less columns for mark in new 
line */
-     int               less_cols_off = 0;      /* columns to skip for mark 
adjust */
-     pos_T     old_cursor;             /* old cursor position */
-     int               newcol = 0;             /* new cursor column */
-     int               newindent = 0;          /* auto-indent of the new line 
*/
-     int               n;
-     int               trunc_line = FALSE;     /* truncate current line 
afterwards */
-     int               retval = FAIL;          /* return value */
- #ifdef FEAT_COMMENTS
-     int               extra_len = 0;          /* length of p_extra string */
-     int               lead_len;               /* length of comment leader */
-     char_u    *lead_flags;    /* position in 'comments' for comment leader */
-     char_u    *leader = NULL;         /* copy of comment leader */
- #endif
-     char_u    *allocated = NULL;      /* allocated memory */
-     char_u    *p;
-     int               saved_char = NUL;       /* init for GCC */
- #if defined(FEAT_SMARTINDENT) || defined(FEAT_COMMENTS)
-     pos_T     *pos;
- #endif
- #ifdef FEAT_SMARTINDENT
-     int               do_si = (!p_paste && curbuf->b_p_si
- # ifdef FEAT_CINDENT
-                                       && !curbuf->b_p_cin
- # endif
- # ifdef FEAT_EVAL
-                                       && *curbuf->b_p_inde == NUL
- # endif
-                       );
-     int               no_si = FALSE;          /* reset did_si afterwards */
-     int               first_char = NUL;       /* init for GCC */
- #endif
- #if defined(FEAT_LISP) || defined(FEAT_CINDENT)
-     int               vreplace_mode;
- #endif
-     int               did_append;             /* appended a new line */
-     int               saved_pi = curbuf->b_p_pi; /* copy of preserveindent 
setting */
- 
-     /*
-      * make a copy of the current line so we can mess with it
-      */
-     saved_line = vim_strsave(ml_get_curline());
-     if (saved_line == NULL)       /* out of memory! */
-       return FALSE;
- 
-     if (State & VREPLACE_FLAG)
-     {
-       /*
-        * With VREPLACE we make a copy of the next line, which we will be
-        * starting to replace.  First make the new line empty and let vim play
-        * with the indenting and comment leader to its heart's content.  Then
-        * we grab what it ended up putting on the new line, put back the
-        * original line, and call ins_char() to put each new character onto
-        * the line, replacing what was there before and pushing the right
-        * stuff onto the replace stack.  -- webb.
-        */
-       if (curwin->w_cursor.lnum < orig_line_count)
-           next_line = vim_strsave(ml_get(curwin->w_cursor.lnum + 1));
-       else
-           next_line = vim_strsave((char_u *)"");
-       if (next_line == NULL)      /* out of memory! */
-           goto theend;
- 
-       /*
-        * In VREPLACE mode, a NL replaces the rest of the line, and starts
-        * replacing the next line, so push all of the characters left on the
-        * line onto the replace stack.  We'll push any other characters that
-        * might be replaced at the start of the next line (due to autoindent
-        * etc) a bit later.
-        */
-       replace_push(NUL);  /* Call twice because BS over NL expects it */
-       replace_push(NUL);
-       p = saved_line + curwin->w_cursor.col;
-       while (*p != NUL)
-       {
-           if (has_mbyte)
-               p += replace_push_mb(p);
-           else
-               replace_push(*p++);
-       }
-       saved_line[curwin->w_cursor.col] = NUL;
-     }
- 
-     if ((State & INSERT) && !(State & VREPLACE_FLAG))
-     {
-       p_extra = saved_line + curwin->w_cursor.col;
- #ifdef FEAT_SMARTINDENT
-       if (do_si)              /* need first char after new line break */
-       {
-           p = skipwhite(p_extra);
-           first_char = *p;
-       }
- #endif
- #ifdef FEAT_COMMENTS
-       extra_len = (int)STRLEN(p_extra);
- #endif
-       saved_char = *p_extra;
-       *p_extra = NUL;
-     }
- 
-     u_clearline();            /* cannot do "U" command when adding lines */
- #ifdef FEAT_SMARTINDENT
-     did_si = FALSE;
- #endif
-     ai_col = 0;
- 
-     /*
-      * If we just did an auto-indent, then we didn't type anything on
-      * the prior line, and it should be truncated.  Do this even if 'ai' is 
not
-      * set because automatically inserting a comment leader also sets did_ai.
-      */
-     if (dir == FORWARD && did_ai)
-       trunc_line = TRUE;
- 
-     /*
-      * If 'autoindent' and/or 'smartindent' is set, try to figure out what
-      * indent to use for the new line.
-      */
-     if (curbuf->b_p_ai
- #ifdef FEAT_SMARTINDENT
-                       || do_si
- #endif
-                                           )
-     {
-       /*
-        * count white space on current line
-        */
- #ifdef FEAT_VARTABS
-       newindent = get_indent_str_vtab(saved_line, curbuf->b_p_ts,
-                                                curbuf->b_p_vts_array, FALSE);
- #else
-       newindent = get_indent_str(saved_line, (int)curbuf->b_p_ts, FALSE);
- #endif
-       if (newindent == 0 && !(flags & OPENLINE_COM_LIST))
-           newindent = second_line_indent; /* for ^^D command in insert mode */
- 
- #ifdef FEAT_SMARTINDENT
-       /*
-        * Do smart indenting.
-        * In insert/replace mode (only when dir == FORWARD)
-        * we may move some text to the next line. If it starts with '{'
-        * don't add an indent. Fixes inserting a NL before '{' in line
-        *      "if (condition) {"
-        */
-       if (!trunc_line && do_si && *saved_line != NUL
-                                   && (p_extra == NULL || first_char != '{'))
-       {
-           char_u  *ptr;
-           char_u  last_char;
- 
-           old_cursor = curwin->w_cursor;
-           ptr = saved_line;
- # ifdef FEAT_COMMENTS
-           if (flags & OPENLINE_DO_COM)
-               lead_len = get_leader_len(ptr, NULL, FALSE, TRUE);
-           else
-               lead_len = 0;
- # endif
-           if (dir == FORWARD)
-           {
-               /*
-                * Skip preprocessor directives, unless they are
-                * recognised as comments.
-                */
-               if (
- # ifdef FEAT_COMMENTS
-                       lead_len == 0 &&
- # endif
-                       ptr[0] == '#')
-               {
-                   while (ptr[0] == '#' && curwin->w_cursor.lnum > 1)
-                       ptr = ml_get(--curwin->w_cursor.lnum);
-                   newindent = get_indent();
-               }
- # ifdef FEAT_COMMENTS
-               if (flags & OPENLINE_DO_COM)
-                   lead_len = get_leader_len(ptr, NULL, FALSE, TRUE);
-               else
-                   lead_len = 0;
-               if (lead_len > 0)
-               {
-                   /*
-                    * This case gets the following right:
-                    *      \*
-                    *       * A comment (read '\' as '/').
-                    *       *\
-                    * #define IN_THE_WAY
-                    *      This should line up here;
-                    */
-                   p = skipwhite(ptr);
-                   if (p[0] == '/' && p[1] == '*')
-                       p++;
-                   if (p[0] == '*')
-                   {
-                       for (p++; *p; p++)
-                       {
-                           if (p[0] == '/' && p[-1] == '*')
-                           {
-                               /*
-                                * End of C comment, indent should line up
-                                * with the line containing the start of
-                                * the comment
-                                */
-                               curwin->w_cursor.col = (colnr_T)(p - ptr);
-                               if ((pos = findmatch(NULL, NUL)) != NULL)
-                               {
-                                   curwin->w_cursor.lnum = pos->lnum;
-                                   newindent = get_indent();
-                               }
-                           }
-                       }
-                   }
-               }
-               else    /* Not a comment line */
- # endif
-               {
-                   /* Find last non-blank in line */
-                   p = ptr + STRLEN(ptr) - 1;
-                   while (p > ptr && VIM_ISWHITE(*p))
-                       --p;
-                   last_char = *p;
- 
-                   /*
-                    * find the character just before the '{' or ';'
-                    */
-                   if (last_char == '{' || last_char == ';')
-                   {
-                       if (p > ptr)
-                           --p;
-                       while (p > ptr && VIM_ISWHITE(*p))
-                           --p;
-                   }
-                   /*
-                    * Try to catch lines that are split over multiple
-                    * lines.  eg:
-                    *      if (condition &&
-                    *                  condition) {
-                    *          Should line up here!
-                    *      }
-                    */
-                   if (*p == ')')
-                   {
-                       curwin->w_cursor.col = (colnr_T)(p - ptr);
-                       if ((pos = findmatch(NULL, '(')) != NULL)
-                       {
-                           curwin->w_cursor.lnum = pos->lnum;
-                           newindent = get_indent();
-                           ptr = ml_get_curline();
-                       }
-                   }
-                   /*
-                    * If last character is '{' do indent, without
-                    * checking for "if" and the like.
-                    */
-                   if (last_char == '{')
-                   {
-                       did_si = TRUE;  /* do indent */
-                       no_si = TRUE;   /* don't delete it when '{' typed */
-                   }
-                   /*
-                    * Look for "if" and the like, use 'cinwords'.
-                    * Don't do this if the previous line ended in ';' or
-                    * '}'.
-                    */
-                   else if (last_char != ';' && last_char != '}'
-                                                      && cin_is_cinword(ptr))
-                       did_si = TRUE;
-               }
-           }
-           else /* dir == BACKWARD */
-           {
-               /*
-                * Skip preprocessor directives, unless they are
-                * recognised as comments.
-                */
-               if (
- # ifdef FEAT_COMMENTS
-                       lead_len == 0 &&
- # endif
-                       ptr[0] == '#')
-               {
-                   int was_backslashed = FALSE;
- 
-                   while ((ptr[0] == '#' || was_backslashed) &&
-                        curwin->w_cursor.lnum < curbuf->b_ml.ml_line_count)
-                   {
-                       if (*ptr && ptr[STRLEN(ptr) - 1] == '\\')
-                           was_backslashed = TRUE;
-                       else
-                           was_backslashed = FALSE;
-                       ptr = ml_get(++curwin->w_cursor.lnum);
-                   }
-                   if (was_backslashed)
-                       newindent = 0;      /* Got to end of file */
-                   else
-                       newindent = get_indent();
-               }
-               p = skipwhite(ptr);
-               if (*p == '}')      /* if line starts with '}': do indent */
-                   did_si = TRUE;
-               else                /* can delete indent when '{' typed */
-                   can_si_back = TRUE;
-           }
-           curwin->w_cursor = old_cursor;
-       }
-       if (do_si)
-           can_si = TRUE;
- #endif /* FEAT_SMARTINDENT */
- 
-       did_ai = TRUE;
-     }
- 
- #ifdef FEAT_COMMENTS
-     /*
-      * Find out if the current line starts with a comment leader.
-      * This may then be inserted in front of the new line.
-      */
-     end_comment_pending = NUL;
-     if (flags & OPENLINE_DO_COM)
-       lead_len = get_leader_len(saved_line, &lead_flags, dir == BACKWARD, 
TRUE);
-     else
-       lead_len = 0;
-     if (lead_len > 0)
-     {
-       char_u  *lead_repl = NULL;          /* replaces comment leader */
-       int     lead_repl_len = 0;          /* length of *lead_repl */
-       char_u  lead_middle[COM_MAX_LEN];   /* middle-comment string */
-       char_u  lead_end[COM_MAX_LEN];      /* end-comment string */
-       char_u  *comment_end = NULL;        /* where lead_end has been found */
-       int     extra_space = FALSE;        /* append extra space */
-       int     current_flag;
-       int     require_blank = FALSE;      /* requires blank after middle */
-       char_u  *p2;
- 
-       /*
-        * If the comment leader has the start, middle or end flag, it may not
-        * be used or may be replaced with the middle leader.
-        */
-       for (p = lead_flags; *p && *p != ':'; ++p)
-       {
-           if (*p == COM_BLANK)
-           {
-               require_blank = TRUE;
-               continue;
-           }
-           if (*p == COM_START || *p == COM_MIDDLE)
-           {
-               current_flag = *p;
-               if (*p == COM_START)
-               {
-                   /*
-                    * Doing "O" on a start of comment does not insert leader.
-                    */
-                   if (dir == BACKWARD)
-                   {
-                       lead_len = 0;
-                       break;
-                   }
- 
-                   /* find start of middle part */
-                   (void)copy_option_part(&p, lead_middle, COM_MAX_LEN, ",");
-                   require_blank = FALSE;
-               }
- 
-               /*
-                * Isolate the strings of the middle and end leader.
-                */
-               while (*p && p[-1] != ':')      /* find end of middle flags */
-               {
-                   if (*p == COM_BLANK)
-                       require_blank = TRUE;
-                   ++p;
-               }
-               (void)copy_option_part(&p, lead_middle, COM_MAX_LEN, ",");
- 
-               while (*p && p[-1] != ':')      /* find end of end flags */
-               {
-                   /* Check whether we allow automatic ending of comments */
-                   if (*p == COM_AUTO_END)
-                       end_comment_pending = -1; /* means we want to set it */
-                   ++p;
-               }
-               n = copy_option_part(&p, lead_end, COM_MAX_LEN, ",");
- 
-               if (end_comment_pending == -1)  /* we can set it now */
-                   end_comment_pending = lead_end[n - 1];
- 
-               /*
-                * If the end of the comment is in the same line, don't use
-                * the comment leader.
-                */
-               if (dir == FORWARD)
-               {
-                   for (p = saved_line + lead_len; *p; ++p)
-                       if (STRNCMP(p, lead_end, n) == 0)
-                       {
-                           comment_end = p;
-                           lead_len = 0;
-                           break;
-                       }
-               }
- 
-               /*
-                * Doing "o" on a start of comment inserts the middle leader.
-                */
-               if (lead_len > 0)
-               {
-                   if (current_flag == COM_START)
-                   {
-                       lead_repl = lead_middle;
-                       lead_repl_len = (int)STRLEN(lead_middle);
-                   }
- 
-                   /*
-                    * If we have hit RETURN immediately after the start
-                    * comment leader, then put a space after the middle
-                    * comment leader on the next line.
-                    */
-                   if (!VIM_ISWHITE(saved_line[lead_len - 1])
-                           && ((p_extra != NULL
-                                   && (int)curwin->w_cursor.col == lead_len)
-                               || (p_extra == NULL
-                                   && saved_line[lead_len] == NUL)
-                               || require_blank))
-                       extra_space = TRUE;
-               }
-               break;
-           }
-           if (*p == COM_END)
-           {
-               /*
-                * Doing "o" on the end of a comment does not insert leader.
-                * Remember where the end is, might want to use it to find the
-                * start (for C-comments).
-                */
-               if (dir == FORWARD)
-               {
-                   comment_end = skipwhite(saved_line);
-                   lead_len = 0;
-                   break;
-               }
- 
-               /*
-                * Doing "O" on the end of a comment inserts the middle leader.
-                * Find the string for the middle leader, searching backwards.
-                */
-               while (p > curbuf->b_p_com && *p != ',')
-                   --p;
-               for (lead_repl = p; lead_repl > curbuf->b_p_com
-                                        && lead_repl[-1] != ':'; --lead_repl)
-                   ;
-               lead_repl_len = (int)(p - lead_repl);
- 
-               /* We can probably always add an extra space when doing "O" on
-                * the comment-end */
-               extra_space = TRUE;
- 
-               /* Check whether we allow automatic ending of comments */
-               for (p2 = p; *p2 && *p2 != ':'; p2++)
-               {
-                   if (*p2 == COM_AUTO_END)
-                       end_comment_pending = -1; /* means we want to set it */
-               }
-               if (end_comment_pending == -1)
-               {
-                   /* Find last character in end-comment string */
-                   while (*p2 && *p2 != ',')
-                       p2++;
-                   end_comment_pending = p2[-1];
-               }
-               break;
-           }
-           if (*p == COM_FIRST)
-           {
-               /*
-                * Comment leader for first line only:  Don't repeat leader
-                * when using "O", blank out leader when using "o".
-                */
-               if (dir == BACKWARD)
-                   lead_len = 0;
-               else
-               {
-                   lead_repl = (char_u *)"";
-                   lead_repl_len = 0;
-               }
-               break;
-           }
-       }
-       if (lead_len)
-       {
-           /* allocate buffer (may concatenate p_extra later) */
-           leader = alloc(lead_len + lead_repl_len + extra_space + extra_len
-                    + (second_line_indent > 0 ? second_line_indent : 0) + 1);
-           allocated = leader;             /* remember to free it later */
- 
-           if (leader == NULL)
-               lead_len = 0;
-           else
-           {
-               vim_strncpy(leader, saved_line, lead_len);
- 
-               /*
-                * Replace leader with lead_repl, right or left adjusted
-                */
-               if (lead_repl != NULL)
-               {
-                   int         c = 0;
-                   int         off = 0;
- 
-                   for (p = lead_flags; *p != NUL && *p != ':'; )
-                   {
-                       if (*p == COM_RIGHT || *p == COM_LEFT)
-                           c = *p++;
-                       else if (VIM_ISDIGIT(*p) || *p == '-')
-                           off = getdigits(&p);
-                       else
-                           ++p;
-                   }
-                   if (c == COM_RIGHT)    /* right adjusted leader */
-                   {
-                       /* find last non-white in the leader to line up with */
-                       for (p = leader + lead_len - 1; p > leader
-                                                     && VIM_ISWHITE(*p); --p)
-                           ;
-                       ++p;
- 
-                       /* Compute the length of the replaced characters in
-                        * screen characters, not bytes. */
-                       {
-                           int     repl_size = vim_strnsize(lead_repl,
-                                                              lead_repl_len);
-                           int     old_size = 0;
-                           char_u  *endp = p;
-                           int     l;
- 
-                           while (old_size < repl_size && p > leader)
-                           {
-                               MB_PTR_BACK(leader, p);
-                               old_size += ptr2cells(p);
-                           }
-                           l = lead_repl_len - (int)(endp - p);
-                           if (l != 0)
-                               mch_memmove(endp + l, endp,
-                                       (size_t)((leader + lead_len) - endp));
-                           lead_len += l;
-                       }
-                       mch_memmove(p, lead_repl, (size_t)lead_repl_len);
-                       if (p + lead_repl_len > leader + lead_len)
-                           p[lead_repl_len] = NUL;
- 
-                       /* blank-out any other chars from the old leader. */
-                       while (--p >= leader)
-                       {
-                           int l = mb_head_off(leader, p);
- 
-                           if (l > 1)
-                           {
-                               p -= l;
-                               if (ptr2cells(p) > 1)
-                               {
-                                   p[1] = ' ';
-                                   --l;
-                               }
-                               mch_memmove(p + 1, p + l + 1,
-                                  (size_t)((leader + lead_len) - (p + l + 1)));
-                               lead_len -= l;
-                               *p = ' ';
-                           }
-                           else if (!VIM_ISWHITE(*p))
-                               *p = ' ';
-                       }
-                   }
-                   else                    /* left adjusted leader */
-                   {
-                       p = skipwhite(leader);
- 
-                       /* Compute the length of the replaced characters in
-                        * screen characters, not bytes. Move the part that is
-                        * not to be overwritten. */
-                       {
-                           int     repl_size = vim_strnsize(lead_repl,
-                                                              lead_repl_len);
-                           int     i;
-                           int     l;
- 
-                           for (i = 0; i < lead_len && p[i] != NUL; i += l)
-                           {
-                               l = (*mb_ptr2len)(p + i);
-                               if (vim_strnsize(p, i + l) > repl_size)
-                                   break;
-                           }
-                           if (i != lead_repl_len)
-                           {
-                               mch_memmove(p + lead_repl_len, p + i,
-                                      (size_t)(lead_len - i - (p - leader)));
-                               lead_len += lead_repl_len - i;
-                           }
-                       }
-                       mch_memmove(p, lead_repl, (size_t)lead_repl_len);
- 
-                       /* Replace any remaining non-white chars in the old
-                        * leader by spaces.  Keep Tabs, the indent must
-                        * remain the same. */
-                       for (p += lead_repl_len; p < leader + lead_len; ++p)
-                           if (!VIM_ISWHITE(*p))
-                           {
-                               /* Don't put a space before a TAB. */
-                               if (p + 1 < leader + lead_len && p[1] == TAB)
-                               {
-                                   --lead_len;
-                                   mch_memmove(p, p + 1,
-                                                    (leader + lead_len) - p);
-                               }
-                               else
-                               {
-                                   int     l = (*mb_ptr2len)(p);
- 
-                                   if (l > 1)
-                                   {
-                                       if (ptr2cells(p) > 1)
-                                       {
-                                           /* Replace a double-wide char with
-                                            * two spaces */
-                                           --l;
-                                           *p++ = ' ';
-                                       }
-                                       mch_memmove(p + 1, p + l,
-                                                    (leader + lead_len) - p);
-                                       lead_len -= l - 1;
-                                   }
-                                   *p = ' ';
-                               }
-                           }
-                       *p = NUL;
-                   }
- 
-                   /* Recompute the indent, it may have changed. */
-                   if (curbuf->b_p_ai
- #ifdef FEAT_SMARTINDENT
-                                       || do_si
- #endif
-                                                          )
- #ifdef FEAT_VARTABS
-                       newindent = get_indent_str_vtab(leader, curbuf->b_p_ts,
-                                                curbuf->b_p_vts_array, FALSE);
- #else
-                       newindent = get_indent_str(leader,
-                                                  (int)curbuf->b_p_ts, FALSE);
- #endif
- 
-                   /* Add the indent offset */
-                   if (newindent + off < 0)
-                   {
-                       off = -newindent;
-                       newindent = 0;
-                   }
-                   else
-                       newindent += off;
- 
-                   /* Correct trailing spaces for the shift, so that
-                    * alignment remains equal. */
-                   while (off > 0 && lead_len > 0
-                                              && leader[lead_len - 1] == ' ')
-                   {
-                       /* Don't do it when there is a tab before the space */
-                       if (vim_strchr(skipwhite(leader), '\t') != NULL)
-                           break;
-                       --lead_len;
-                       --off;
-                   }
- 
-                   /* If the leader ends in white space, don't add an
-                    * extra space */
-                   if (lead_len > 0 && VIM_ISWHITE(leader[lead_len - 1]))
-                       extra_space = FALSE;
-                   leader[lead_len] = NUL;
-               }
- 
-               if (extra_space)
-               {
-                   leader[lead_len++] = ' ';
-                   leader[lead_len] = NUL;
-               }
- 
-               newcol = lead_len;
- 
-               /*
-                * if a new indent will be set below, remove the indent that
-                * is in the comment leader
-                */
-               if (newindent
- #ifdef FEAT_SMARTINDENT
-                               || did_si
- #endif
-                                          )
-               {
-                   while (lead_len && VIM_ISWHITE(*leader))
-                   {
-                       --lead_len;
-                       --newcol;
-                       ++leader;
-                   }
-               }
- 
-           }
- #ifdef FEAT_SMARTINDENT
-           did_si = can_si = FALSE;
- #endif
-       }
-       else if (comment_end != NULL)
-       {
-           /*
-            * We have finished a comment, so we don't use the leader.
-            * If this was a C-comment and 'ai' or 'si' is set do a normal
-            * indent to align with the line containing the start of the
-            * comment.
-            */
-           if (comment_end[0] == '*' && comment_end[1] == '/' &&
-                       (curbuf->b_p_ai
- #ifdef FEAT_SMARTINDENT
-                                       || do_si
- #endif
-                                                          ))
-           {
-               old_cursor = curwin->w_cursor;
-               curwin->w_cursor.col = (colnr_T)(comment_end - saved_line);
-               if ((pos = findmatch(NULL, NUL)) != NULL)
-               {
-                   curwin->w_cursor.lnum = pos->lnum;
-                   newindent = get_indent();
-               }
-               curwin->w_cursor = old_cursor;
-           }
-       }
-     }
- #endif
- 
-     /* (State == INSERT || State == REPLACE), only when dir == FORWARD */
-     if (p_extra != NULL)
-     {
-       *p_extra = saved_char;          /* restore char that NUL replaced */
- 
-       /*
-        * When 'ai' set or "flags" has OPENLINE_DELSPACES, skip to the first
-        * non-blank.
-        *
-        * When in REPLACE mode, put the deleted blanks on the replace stack,
-        * preceded by a NUL, so they can be put back when a BS is entered.
-        */
-       if (REPLACE_NORMAL(State))
-           replace_push(NUL);      /* end of extra blanks */
-       if (curbuf->b_p_ai || (flags & OPENLINE_DELSPACES))
-       {
-           while ((*p_extra == ' ' || *p_extra == '\t')
-                   && (!enc_utf8
-                              || !utf_iscomposing(utf_ptr2char(p_extra + 1))))
-           {
-               if (REPLACE_NORMAL(State))
-                   replace_push(*p_extra);
-               ++p_extra;
-               ++less_cols_off;
-           }
-       }
- 
-       /* columns for marks adjusted for removed columns */
-       less_cols = (int)(p_extra - saved_line);
-     }
- 
-     if (p_extra == NULL)
-       p_extra = (char_u *)"";             /* append empty line */
- 
- #ifdef FEAT_COMMENTS
-     /* concatenate leader and p_extra, if there is a leader */
-     if (lead_len)
-     {
-       if (flags & OPENLINE_COM_LIST && second_line_indent > 0)
-       {
-           int i;
-           int padding = second_line_indent
-                                         - (newindent + (int)STRLEN(leader));
- 
-           /* Here whitespace is inserted after the comment char.
-            * Below, set_indent(newindent, SIN_INSERT) will insert the
-            * whitespace needed before the comment char. */
-           for (i = 0; i < padding; i++)
-           {
-               STRCAT(leader, " ");
-               less_cols--;
-               newcol++;
-           }
-       }
-       STRCAT(leader, p_extra);
-       p_extra = leader;
-       did_ai = TRUE;      /* So truncating blanks works with comments */
-       less_cols -= lead_len;
-     }
-     else
-       end_comment_pending = NUL;  /* turns out there was no leader */
- #endif
- 
-     old_cursor = curwin->w_cursor;
-     if (dir == BACKWARD)
-       --curwin->w_cursor.lnum;
-     if (!(State & VREPLACE_FLAG) || old_cursor.lnum >= orig_line_count)
-     {
-       if (ml_append(curwin->w_cursor.lnum, p_extra, (colnr_T)0, FALSE)
-                                                                     == FAIL)
-           goto theend;
-       /* Postpone calling changed_lines(), because it would mess up folding
-        * with markers.
-        * Skip mark_adjust when adding a line after the last one, there can't
-        * be marks there. But still needed in diff mode. */
-       if (curwin->w_cursor.lnum + 1 < curbuf->b_ml.ml_line_count
- #ifdef FEAT_DIFF
-               || curwin->w_p_diff
- #endif
-           )
-           mark_adjust(curwin->w_cursor.lnum + 1, (linenr_T)MAXLNUM, 1L, 0L);
-       did_append = TRUE;
-     }
-     else
-     {
-       /*
-        * In VREPLACE mode we are starting to replace the next line.
-        */
-       curwin->w_cursor.lnum++;
-       if (curwin->w_cursor.lnum >= Insstart.lnum + vr_lines_changed)
-       {
-           /* In case we NL to a new line, BS to the previous one, and NL
-            * again, we don't want to save the new line for undo twice.
-            */
-           (void)u_save_cursor();                  /* errors are ignored! */
-           vr_lines_changed++;
-       }
-       ml_replace(curwin->w_cursor.lnum, p_extra, TRUE);
-       changed_bytes(curwin->w_cursor.lnum, 0);
-       curwin->w_cursor.lnum--;
-       did_append = FALSE;
-     }
- 
-     if (newindent
- #ifdef FEAT_SMARTINDENT
-                   || did_si
- #endif
-                               )
-     {
-       ++curwin->w_cursor.lnum;
- #ifdef FEAT_SMARTINDENT
-       if (did_si)
-       {
-           int sw = (int)get_sw_value(curbuf);
- 
-           if (p_sr)
-               newindent -= newindent % sw;
-           newindent += sw;
-       }
- #endif
-       /* Copy the indent */
-       if (curbuf->b_p_ci)
-       {
-           (void)copy_indent(newindent, saved_line);
- 
-           /*
-            * Set the 'preserveindent' option so that any further screwing
-            * with the line doesn't entirely destroy our efforts to preserve
-            * it.  It gets restored at the function end.
-            */
-           curbuf->b_p_pi = TRUE;
-       }
-       else
-           (void)set_indent(newindent, SIN_INSERT);
-       less_cols -= curwin->w_cursor.col;
- 
-       ai_col = curwin->w_cursor.col;
- 
-       /*
-        * In REPLACE mode, for each character in the new indent, there must
-        * be a NUL on the replace stack, for when it is deleted with BS
-        */
-       if (REPLACE_NORMAL(State))
-           for (n = 0; n < (int)curwin->w_cursor.col; ++n)
-               replace_push(NUL);
-       newcol += curwin->w_cursor.col;
- #ifdef FEAT_SMARTINDENT
-       if (no_si)
-           did_si = FALSE;
- #endif
-     }
- 
- #ifdef FEAT_COMMENTS
-     /*
-      * In REPLACE mode, for each character in the extra leader, there must be
-      * a NUL on the replace stack, for when it is deleted with BS.
-      */
-     if (REPLACE_NORMAL(State))
-       while (lead_len-- > 0)
-           replace_push(NUL);
- #endif
- 
-     curwin->w_cursor = old_cursor;
- 
-     if (dir == FORWARD)
-     {
-       if (trunc_line || (State & INSERT))
-       {
-           /* truncate current line at cursor */
-           saved_line[curwin->w_cursor.col] = NUL;
-           /* Remove trailing white space, unless OPENLINE_KEEPTRAIL used. */
-           if (trunc_line && !(flags & OPENLINE_KEEPTRAIL))
-               truncate_spaces(saved_line);
-           ml_replace(curwin->w_cursor.lnum, saved_line, FALSE);
-           saved_line = NULL;
-           if (did_append)
-           {
-               changed_lines(curwin->w_cursor.lnum, curwin->w_cursor.col,
-                                              curwin->w_cursor.lnum + 1, 1L);
-               did_append = FALSE;
- 
-               /* Move marks after the line break to the new line. */
-               if (flags & OPENLINE_MARKFIX)
-                   mark_col_adjust(curwin->w_cursor.lnum,
-                                        curwin->w_cursor.col + less_cols_off,
-                                                     1L, (long)-less_cols, 0);
-           }
-           else
-               changed_bytes(curwin->w_cursor.lnum, curwin->w_cursor.col);
-       }
- 
-       /*
-        * Put the cursor on the new line.  Careful: the scrollup() above may
-        * have moved w_cursor, we must use old_cursor.
-        */
-       curwin->w_cursor.lnum = old_cursor.lnum + 1;
-     }
-     if (did_append)
-       changed_lines(curwin->w_cursor.lnum, 0, curwin->w_cursor.lnum, 1L);
- 
-     curwin->w_cursor.col = newcol;
-     curwin->w_cursor.coladd = 0;
- 
- #if defined(FEAT_LISP) || defined(FEAT_CINDENT)
-     /*
-      * In VREPLACE mode, we are handling the replace stack ourselves, so stop
-      * fixthisline() from doing it (via change_indent()) by telling it we're 
in
-      * normal INSERT mode.
-      */
-     if (State & VREPLACE_FLAG)
-     {
-       vreplace_mode = State;  /* So we know to put things right later */
-       State = INSERT;
-     }
-     else
-       vreplace_mode = 0;
- #endif
- #ifdef FEAT_LISP
-     /*
-      * May do lisp indenting.
-      */
-     if (!p_paste
- # ifdef FEAT_COMMENTS
-           && leader == NULL
- # endif
-           && curbuf->b_p_lisp
-           && curbuf->b_p_ai)
-     {
-       fixthisline(get_lisp_indent);
-       ai_col = (colnr_T)getwhitecols_curline();
-     }
- #endif
- #ifdef FEAT_CINDENT
-     /*
-      * May do indenting after opening a new line.
-      */
-     if (!p_paste
-           && (curbuf->b_p_cin
- #  ifdef FEAT_EVAL
-                   || *curbuf->b_p_inde != NUL
- #  endif
-               )
-           && in_cinkeys(dir == FORWARD
-               ? KEY_OPEN_FORW
-               : KEY_OPEN_BACK, ' ', linewhite(curwin->w_cursor.lnum)))
-     {
-       do_c_expr_indent();
-       ai_col = (colnr_T)getwhitecols_curline();
-     }
- #endif
- #if defined(FEAT_LISP) || defined(FEAT_CINDENT)
-     if (vreplace_mode != 0)
-       State = vreplace_mode;
- #endif
- 
-     /*
-      * Finally, VREPLACE gets the stuff on the new line, then puts back the
-      * original line, and inserts the new stuff char by char, pushing old 
stuff
-      * onto the replace stack (via ins_char()).
-      */
-     if (State & VREPLACE_FLAG)
-     {
-       /* Put new line in p_extra */
-       p_extra = vim_strsave(ml_get_curline());
-       if (p_extra == NULL)
-           goto theend;
- 
-       /* Put back original line */
-       ml_replace(curwin->w_cursor.lnum, next_line, FALSE);
- 
-       /* Insert new stuff into line again */
-       curwin->w_cursor.col = 0;
-       curwin->w_cursor.coladd = 0;
-       ins_bytes(p_extra);     /* will call changed_bytes() */
-       vim_free(p_extra);
-       next_line = NULL;
-     }
- 
-     retval = OK;              /* success! */
- theend:
-     curbuf->b_p_pi = saved_pi;
-     vim_free(saved_line);
-     vim_free(next_line);
-     vim_free(allocated);
-     return retval;
- }
- 
  #if defined(FEAT_COMMENTS) || defined(PROTO)
  /*
   * get_leader_len() returns the length in bytes of the prefix of the given
--- 559,564 ----
***************
*** 2242,2728 ****
      return (count);
  }
  
- /*
-  * Insert string "p" at the cursor position.  Stops at a NUL byte.
-  * Handles Replace mode and multi-byte characters.
-  */
-     void
- ins_bytes(char_u *p)
- {
-     ins_bytes_len(p, (int)STRLEN(p));
- }
- 
- /*
-  * Insert string "p" with length "len" at the cursor position.
-  * Handles Replace mode and multi-byte characters.
-  */
-     void
- ins_bytes_len(char_u *p, int len)
- {
-     int               i;
-     int               n;
- 
-     if (has_mbyte)
-       for (i = 0; i < len; i += n)
-       {
-           if (enc_utf8)
-               // avoid reading past p[len]
-               n = utfc_ptr2len_len(p + i, len - i);
-           else
-               n = (*mb_ptr2len)(p + i);
-           ins_char_bytes(p + i, n);
-       }
-     else
-       for (i = 0; i < len; ++i)
-           ins_char(p[i]);
- }
- 
- /*
-  * Insert or replace a single character at the cursor position.
-  * When in REPLACE or VREPLACE mode, replace any existing character.
-  * Caller must have prepared for undo.
-  * For multi-byte characters we get the whole character, the caller must
-  * convert bytes to a character.
-  */
-     void
- ins_char(int c)
- {
-     char_u    buf[MB_MAXBYTES + 1];
-     int               n = (*mb_char2bytes)(c, buf);
- 
-     /* When "c" is 0x100, 0x200, etc. we don't want to insert a NUL byte.
-      * Happens for CTRL-Vu9900. */
-     if (buf[0] == 0)
-       buf[0] = '\n';
- 
-     ins_char_bytes(buf, n);
- }
- 
-     void
- ins_char_bytes(char_u *buf, int charlen)
- {
-     int               c = buf[0];
-     int               newlen;         // nr of bytes inserted
-     int               oldlen;         // nr of bytes deleted (0 when not 
replacing)
-     char_u    *p;
-     char_u    *newp;
-     char_u    *oldp;
-     int               linelen;        // length of old line including NUL
-     colnr_T   col;
-     linenr_T  lnum = curwin->w_cursor.lnum;
-     int               i;
- 
-     /* Break tabs if needed. */
-     if (virtual_active() && curwin->w_cursor.coladd > 0)
-       coladvance_force(getviscol());
- 
-     col = curwin->w_cursor.col;
-     oldp = ml_get(lnum);
-     linelen = (int)STRLEN(oldp) + 1;
- 
-     /* The lengths default to the values for when not replacing. */
-     oldlen = 0;
-     newlen = charlen;
- 
-     if (State & REPLACE_FLAG)
-     {
-       if (State & VREPLACE_FLAG)
-       {
-           colnr_T     new_vcol = 0;   /* init for GCC */
-           colnr_T     vcol;
-           int         old_list;
- 
-           /*
-            * Disable 'list' temporarily, unless 'cpo' contains the 'L' flag.
-            * Returns the old value of list, so when finished,
-            * curwin->w_p_list should be set back to this.
-            */
-           old_list = curwin->w_p_list;
-           if (old_list && vim_strchr(p_cpo, CPO_LISTWM) == NULL)
-               curwin->w_p_list = FALSE;
- 
-           /*
-            * In virtual replace mode each character may replace one or more
-            * characters (zero if it's a TAB).  Count the number of bytes to
-            * be deleted to make room for the new character, counting screen
-            * cells.  May result in adding spaces to fill a gap.
-            */
-           getvcol(curwin, &curwin->w_cursor, NULL, &vcol, NULL);
-           new_vcol = vcol + chartabsize(buf, vcol);
-           while (oldp[col + oldlen] != NUL && vcol < new_vcol)
-           {
-               vcol += chartabsize(oldp + col + oldlen, vcol);
-               /* Don't need to remove a TAB that takes us to the right
-                * position. */
-               if (vcol > new_vcol && oldp[col + oldlen] == TAB)
-                   break;
-               oldlen += (*mb_ptr2len)(oldp + col + oldlen);
-               /* Deleted a bit too much, insert spaces. */
-               if (vcol > new_vcol)
-                   newlen += vcol - new_vcol;
-           }
-           curwin->w_p_list = old_list;
-       }
-       else if (oldp[col] != NUL)
-       {
-           /* normal replace */
-           oldlen = (*mb_ptr2len)(oldp + col);
-       }
- 
- 
-       /* Push the replaced bytes onto the replace stack, so that they can be
-        * put back when BS is used.  The bytes of a multi-byte character are
-        * done the other way around, so that the first byte is popped off
-        * first (it tells the byte length of the character). */
-       replace_push(NUL);
-       for (i = 0; i < oldlen; ++i)
-       {
-           if (has_mbyte)
-               i += replace_push_mb(oldp + col + i) - 1;
-           else
-               replace_push(oldp[col + i]);
-       }
-     }
- 
-     newp = alloc_check((unsigned)(linelen + newlen - oldlen));
-     if (newp == NULL)
-       return;
- 
-     /* Copy bytes before the cursor. */
-     if (col > 0)
-       mch_memmove(newp, oldp, (size_t)col);
- 
-     /* Copy bytes after the changed character(s). */
-     p = newp + col;
-     if (linelen > col + oldlen)
-       mch_memmove(p + newlen, oldp + col + oldlen,
-                                           (size_t)(linelen - col - oldlen));
- 
-     /* Insert or overwrite the new character. */
-     mch_memmove(p, buf, charlen);
-     i = charlen;
- 
-     /* Fill with spaces when necessary. */
-     while (i < newlen)
-       p[i++] = ' ';
- 
-     // Replace the line in the buffer.
-     ml_replace(lnum, newp, FALSE);
- 
-     // mark the buffer as changed and prepare for displaying
-     inserted_bytes(lnum, col, newlen - oldlen);
- 
-     /*
-      * If we're in Insert or Replace mode and 'showmatch' is set, then briefly
-      * show the match for right parens and braces.
-      */
-     if (p_sm && (State & INSERT)
-           && msg_silent == 0
- #ifdef FEAT_INS_EXPAND
-           && !ins_compl_active()
- #endif
-        )
-     {
-       if (has_mbyte)
-           showmatch(mb_ptr2char(buf));
-       else
-           showmatch(c);
-     }
- 
- #ifdef FEAT_RIGHTLEFT
-     if (!p_ri || (State & REPLACE_FLAG))
- #endif
-     {
-       /* Normal insert: move cursor right */
-       curwin->w_cursor.col += charlen;
-     }
-     /*
-      * TODO: should try to update w_row here, to avoid recomputing it later.
-      */
- }
- 
- /*
-  * Insert a string at the cursor position.
-  * Note: Does NOT handle Replace mode.
-  * Caller must have prepared for undo.
-  */
-     void
- ins_str(char_u *s)
- {
-     char_u    *oldp, *newp;
-     int               newlen = (int)STRLEN(s);
-     int               oldlen;
-     colnr_T   col;
-     linenr_T  lnum = curwin->w_cursor.lnum;
- 
-     if (virtual_active() && curwin->w_cursor.coladd > 0)
-       coladvance_force(getviscol());
- 
-     col = curwin->w_cursor.col;
-     oldp = ml_get(lnum);
-     oldlen = (int)STRLEN(oldp);
- 
-     newp = alloc_check((unsigned)(oldlen + newlen + 1));
-     if (newp == NULL)
-       return;
-     if (col > 0)
-       mch_memmove(newp, oldp, (size_t)col);
-     mch_memmove(newp + col, s, (size_t)newlen);
-     mch_memmove(newp + col + newlen, oldp + col, (size_t)(oldlen - col + 1));
-     ml_replace(lnum, newp, FALSE);
-     inserted_bytes(lnum, col, newlen);
-     curwin->w_cursor.col += newlen;
- }
- 
- /*
-  * Delete one character under the cursor.
-  * If "fixpos" is TRUE, don't leave the cursor on the NUL after the line.
-  * Caller must have prepared for undo.
-  *
-  * return FAIL for failure, OK otherwise
-  */
-     int
- del_char(int fixpos)
- {
-     if (has_mbyte)
-     {
-       /* Make sure the cursor is at the start of a character. */
-       mb_adjust_cursor();
-       if (*ml_get_cursor() == NUL)
-           return FAIL;
-       return del_chars(1L, fixpos);
-     }
-     return del_bytes(1L, fixpos, TRUE);
- }
- 
- /*
-  * Like del_bytes(), but delete characters instead of bytes.
-  */
-     int
- del_chars(long count, int fixpos)
- {
-     long      bytes = 0;
-     long      i;
-     char_u    *p;
-     int               l;
- 
-     p = ml_get_cursor();
-     for (i = 0; i < count && *p != NUL; ++i)
-     {
-       l = (*mb_ptr2len)(p);
-       bytes += l;
-       p += l;
-     }
-     return del_bytes(bytes, fixpos, TRUE);
- }
- 
- /*
-  * Delete "count" bytes under the cursor.
-  * If "fixpos" is TRUE, don't leave the cursor on the NUL after the line.
-  * Caller must have prepared for undo.
-  *
-  * Return FAIL for failure, OK otherwise.
-  */
-     int
- del_bytes(
-     long      count,
-     int               fixpos_arg,
-     int               use_delcombine UNUSED)      /* 'delcombine' option 
applies */
- {
-     char_u    *oldp, *newp;
-     colnr_T   oldlen;
-     colnr_T   newlen;
-     linenr_T  lnum = curwin->w_cursor.lnum;
-     colnr_T   col = curwin->w_cursor.col;
-     int               alloc_newp;
-     long      movelen;
-     int               fixpos = fixpos_arg;
- 
-     oldp = ml_get(lnum);
-     oldlen = (int)STRLEN(oldp);
- 
-     /* Can't do anything when the cursor is on the NUL after the line. */
-     if (col >= oldlen)
-       return FAIL;
- 
-     /* If "count" is zero there is nothing to do. */
-     if (count == 0)
-       return OK;
- 
-     /* If "count" is negative the caller must be doing something wrong. */
-     if (count < 1)
-     {
-       siemsg("E950: Invalid count for del_bytes(): %ld", count);
-       return FAIL;
-     }
- 
-     /* If 'delcombine' is set and deleting (less than) one character, only
-      * delete the last combining character. */
-     if (p_deco && use_delcombine && enc_utf8
-                                        && utfc_ptr2len(oldp + col) >= count)
-     {
-       int     cc[MAX_MCO];
-       int     n;
- 
-       (void)utfc_ptr2char(oldp + col, cc);
-       if (cc[0] != NUL)
-       {
-           /* Find the last composing char, there can be several. */
-           n = col;
-           do
-           {
-               col = n;
-               count = utf_ptr2len(oldp + n);
-               n += count;
-           } while (UTF_COMPOSINGLIKE(oldp + col, oldp + n));
-           fixpos = 0;
-       }
-     }
- 
-     /*
-      * When count is too big, reduce it.
-      */
-     movelen = (long)oldlen - (long)col - count + 1; /* includes trailing NUL 
*/
-     if (movelen <= 1)
-     {
-       /*
-        * If we just took off the last character of a non-blank line, and
-        * fixpos is TRUE, we don't want to end up positioned at the NUL,
-        * unless "restart_edit" is set or 'virtualedit' contains "onemore".
-        */
-       if (col > 0 && fixpos && restart_edit == 0
-                                             && (ve_flags & VE_ONEMORE) == 0)
-       {
-           --curwin->w_cursor.col;
-           curwin->w_cursor.coladd = 0;
-           if (has_mbyte)
-               curwin->w_cursor.col -=
-                           (*mb_head_off)(oldp, oldp + curwin->w_cursor.col);
-       }
-       count = oldlen - col;
-       movelen = 1;
-     }
-     newlen = oldlen - count;
- 
-     /*
-      * If the old line has been allocated the deletion can be done in the
-      * existing line. Otherwise a new line has to be allocated
-      * Can't do this when using Netbeans, because we would need to invoke
-      * netbeans_removed(), which deallocates the line.  Let ml_replace() take
-      * care of notifying Netbeans.
-      */
- #ifdef FEAT_NETBEANS_INTG
-     if (netbeans_active())
-       alloc_newp = TRUE;
-     else
- #endif
-       alloc_newp = !ml_line_alloced();    // check if oldp was allocated
-     if (!alloc_newp)
-       newp = oldp;                        // use same allocated memory
-     else
-     {                                     // need to allocate a new line
-       newp = alloc((unsigned)(newlen + 1));
-       if (newp == NULL)
-           return FAIL;
-       mch_memmove(newp, oldp, (size_t)col);
-     }
-     mch_memmove(newp + col, oldp + col + count, (size_t)movelen);
-     if (alloc_newp)
-       ml_replace(lnum, newp, FALSE);
- #ifdef FEAT_TEXT_PROP
-     else
-     {
-       // Also move any following text properties.
-       if (oldlen + 1 < curbuf->b_ml.ml_line_len)
-           mch_memmove(newp + newlen + 1, oldp + oldlen + 1,
-                              (size_t)curbuf->b_ml.ml_line_len - oldlen - 1);
-       curbuf->b_ml.ml_line_len -= count;
-     }
- #endif
- 
-     // mark the buffer as changed and prepare for displaying
-     inserted_bytes(lnum, curwin->w_cursor.col, -count);
- 
-     return OK;
- }
- 
- /*
-  * Delete from cursor to end of line.
-  * Caller must have prepared for undo.
-  *
-  * return FAIL for failure, OK otherwise
-  */
-     int
- truncate_line(
-     int               fixpos)     /* if TRUE fix the cursor position when 
done */
- {
-     char_u    *newp;
-     linenr_T  lnum = curwin->w_cursor.lnum;
-     colnr_T   col = curwin->w_cursor.col;
- 
-     if (col == 0)
-       newp = vim_strsave((char_u *)"");
-     else
-       newp = vim_strnsave(ml_get(lnum), col);
- 
-     if (newp == NULL)
-       return FAIL;
- 
-     ml_replace(lnum, newp, FALSE);
- 
-     /* mark the buffer as changed and prepare for displaying */
-     changed_bytes(lnum, curwin->w_cursor.col);
- 
-     /*
-      * If "fixpos" is TRUE we don't want to end up positioned at the NUL.
-      */
-     if (fixpos && curwin->w_cursor.col > 0)
-       --curwin->w_cursor.col;
- 
-     return OK;
- }
- 
- /*
-  * Delete "nlines" lines at the cursor.
-  * Saves the lines for undo first if "undo" is TRUE.
-  */
-     void
- del_lines(
-     long      nlines,         /* number of lines to delete */
-     int               undo)           /* if TRUE, prepare for undo */
- {
-     long      n;
-     linenr_T  first = curwin->w_cursor.lnum;
- 
-     if (nlines <= 0)
-       return;
- 
-     /* save the deleted lines for undo */
-     if (undo && u_savedel(first, nlines) == FAIL)
-       return;
- 
-     for (n = 0; n < nlines; )
-     {
-       if (curbuf->b_ml.ml_flags & ML_EMPTY)       /* nothing to delete */
-           break;
- 
-       ml_delete(first, TRUE);
-       ++n;
- 
-       /* If we delete the last line in the file, stop */
-       if (first > curbuf->b_ml.ml_line_count)
-           break;
-     }
- 
-     /* Correct the cursor position before calling deleted_lines_mark(), it may
-      * trigger a callback to display the cursor. */
-     curwin->w_cursor.col = 0;
-     check_cursor_lnum();
- 
-     /* adjust marks, mark the buffer as changed and prepare for displaying */
-     deleted_lines_mark(first, n);
- }
- 
      int
  gchar_pos(pos_T *pos)
  {
--- 1043,1048 ----
***************
*** 2790,3309 ****
  }
  
  /*
-  * Call this function when something in the current buffer is changed.
-  *
-  * Most often called through changed_bytes() and changed_lines(), which also
-  * mark the area of the display to be redrawn.
-  *
-  * Careful: may trigger autocommands that reload the buffer.
-  */
-     void
- changed(void)
- {
- #if defined(FEAT_XIM) && defined(FEAT_GUI_GTK)
-     if (p_imst == IM_ON_THE_SPOT)
-     {
-       /* The text of the preediting area is inserted, but this doesn't
-        * mean a change of the buffer yet.  That is delayed until the
-        * text is committed. (this means preedit becomes empty) */
-       if (im_is_preediting() && !xim_changed_while_preediting)
-           return;
-       xim_changed_while_preediting = FALSE;
-     }
- #endif
- 
-     if (!curbuf->b_changed)
-     {
-       int     save_msg_scroll = msg_scroll;
- 
-       /* Give a warning about changing a read-only file.  This may also
-        * check-out the file, thus change "curbuf"! */
-       change_warning(0);
- 
-       /* Create a swap file if that is wanted.
-        * Don't do this for "nofile" and "nowrite" buffer types. */
-       if (curbuf->b_may_swap
- #ifdef FEAT_QUICKFIX
-               && !bt_dontwrite(curbuf)
- #endif
-               )
-       {
-           int save_need_wait_return = need_wait_return;
- 
-           need_wait_return = FALSE;
-           ml_open_file(curbuf);
- 
-           /* The ml_open_file() can cause an ATTENTION message.
-            * Wait two seconds, to make sure the user reads this unexpected
-            * message.  Since we could be anywhere, call wait_return() now,
-            * and don't let the emsg() set msg_scroll. */
-           if (need_wait_return && emsg_silent == 0)
-           {
-               out_flush();
-               ui_delay(2000L, TRUE);
-               wait_return(TRUE);
-               msg_scroll = save_msg_scroll;
-           }
-           else
-               need_wait_return = save_need_wait_return;
-       }
-       changed_int();
-     }
-     ++CHANGEDTICK(curbuf);
- 
- #ifdef FEAT_SEARCH_EXTRA
-     // If a pattern is highlighted, the position may now be invalid.
-     highlight_match = FALSE;
- #endif
- }
- 
- /*
-  * Internal part of changed(), no user interaction.
-  */
-     void
- changed_int(void)
- {
-     curbuf->b_changed = TRUE;
-     ml_setflags(curbuf);
-     check_status(curbuf);
-     redraw_tabline = TRUE;
- #ifdef FEAT_TITLE
-     need_maketitle = TRUE;        /* set window title later */
- #endif
- }
- 
- static void changedOneline(buf_T *buf, linenr_T lnum);
- static void changed_lines_buf(buf_T *buf, linenr_T lnum, linenr_T lnume, long 
xtra);
- static void changed_common(linenr_T lnum, colnr_T col, linenr_T lnume, long 
xtra);
- 
- /*
-  * Changed bytes within a single line for the current buffer.
-  * - marks the windows on this buffer to be redisplayed
-  * - marks the buffer changed by calling changed()
-  * - invalidates cached values
-  * Careful: may trigger autocommands that reload the buffer.
-  */
-     void
- changed_bytes(linenr_T lnum, colnr_T col)
- {
-     changedOneline(curbuf, lnum);
-     changed_common(lnum, col, lnum + 1, 0L);
- 
- #ifdef FEAT_DIFF
-     /* Diff highlighting in other diff windows may need to be updated too. */
-     if (curwin->w_p_diff)
-     {
-       win_T       *wp;
-       linenr_T    wlnum;
- 
-       FOR_ALL_WINDOWS(wp)
-           if (wp->w_p_diff && wp != curwin)
-           {
-               redraw_win_later(wp, VALID);
-               wlnum = diff_lnum_win(lnum, wp);
-               if (wlnum > 0)
-                   changedOneline(wp->w_buffer, wlnum);
-           }
-     }
- #endif
- }
- 
- /*
-  * Like changed_bytes() but also adjust text properties for "added" bytes.
-  * When "added" is negative text was deleted.
-  */
-     void
- inserted_bytes(linenr_T lnum, colnr_T col, int added UNUSED)
- {
-     changed_bytes(lnum, col);
- 
- #ifdef FEAT_TEXT_PROP
-     if (curbuf->b_has_textprop && added != 0)
-       adjust_prop_columns(lnum, col, added);
- #endif
- }
- 
-     static void
- changedOneline(buf_T *buf, linenr_T lnum)
- {
-     if (buf->b_mod_set)
-     {
-       /* find the maximum area that must be redisplayed */
-       if (lnum < buf->b_mod_top)
-           buf->b_mod_top = lnum;
-       else if (lnum >= buf->b_mod_bot)
-           buf->b_mod_bot = lnum + 1;
-     }
-     else
-     {
-       /* set the area that must be redisplayed to one line */
-       buf->b_mod_set = TRUE;
-       buf->b_mod_top = lnum;
-       buf->b_mod_bot = lnum + 1;
-       buf->b_mod_xlines = 0;
-     }
- }
- 
- /*
-  * Appended "count" lines below line "lnum" in the current buffer.
-  * Must be called AFTER the change and after mark_adjust().
-  * Takes care of marking the buffer to be redrawn and sets the changed flag.
-  */
-     void
- appended_lines(linenr_T lnum, long count)
- {
-     changed_lines(lnum + 1, 0, lnum + 1, count);
- }
- 
- /*
-  * Like appended_lines(), but adjust marks first.
-  */
-     void
- appended_lines_mark(linenr_T lnum, long count)
- {
-     /* Skip mark_adjust when adding a line after the last one, there can't
-      * be marks there. But it's still needed in diff mode. */
-     if (lnum + count < curbuf->b_ml.ml_line_count
- #ifdef FEAT_DIFF
-           || curwin->w_p_diff
- #endif
-       )
-       mark_adjust(lnum + 1, (linenr_T)MAXLNUM, count, 0L);
-     changed_lines(lnum + 1, 0, lnum + 1, count);
- }
- 
- /*
-  * Deleted "count" lines at line "lnum" in the current buffer.
-  * Must be called AFTER the change and after mark_adjust().
-  * Takes care of marking the buffer to be redrawn and sets the changed flag.
-  */
-     void
- deleted_lines(linenr_T lnum, long count)
- {
-     changed_lines(lnum, 0, lnum + count, -count);
- }
- 
- /*
-  * Like deleted_lines(), but adjust marks first.
-  * Make sure the cursor is on a valid line before calling, a GUI callback may
-  * be triggered to display the cursor.
-  */
-     void
- deleted_lines_mark(linenr_T lnum, long count)
- {
-     mark_adjust(lnum, (linenr_T)(lnum + count - 1), (long)MAXLNUM, -count);
-     changed_lines(lnum, 0, lnum + count, -count);
- }
- 
- /*
-  * Changed lines for the current buffer.
-  * Must be called AFTER the change and after mark_adjust().
-  * - mark the buffer changed by calling changed()
-  * - mark the windows on this buffer to be redisplayed
-  * - invalidate cached values
-  * "lnum" is the first line that needs displaying, "lnume" the first line
-  * below the changed lines (BEFORE the change).
-  * When only inserting lines, "lnum" and "lnume" are equal.
-  * Takes care of calling changed() and updating b_mod_*.
-  * Careful: may trigger autocommands that reload the buffer.
-  */
-     void
- changed_lines(
-     linenr_T  lnum,       /* first line with change */
-     colnr_T   col,        /* column in first line with change */
-     linenr_T  lnume,      /* line below last changed line */
-     long      xtra)       /* number of extra lines (negative when deleting) */
- {
-     changed_lines_buf(curbuf, lnum, lnume, xtra);
- 
- #ifdef FEAT_DIFF
-     if (xtra == 0 && curwin->w_p_diff && !diff_internal())
-     {
-       /* When the number of lines doesn't change then mark_adjust() isn't
-        * called and other diff buffers still need to be marked for
-        * displaying. */
-       win_T       *wp;
-       linenr_T    wlnum;
- 
-       FOR_ALL_WINDOWS(wp)
-           if (wp->w_p_diff && wp != curwin)
-           {
-               redraw_win_later(wp, VALID);
-               wlnum = diff_lnum_win(lnum, wp);
-               if (wlnum > 0)
-                   changed_lines_buf(wp->w_buffer, wlnum,
-                                                   lnume - lnum + wlnum, 0L);
-           }
-     }
- #endif
- 
-     changed_common(lnum, col, lnume, xtra);
- }
- 
-     static void
- changed_lines_buf(
-     buf_T     *buf,
-     linenr_T  lnum,       /* first line with change */
-     linenr_T  lnume,      /* line below last changed line */
-     long      xtra)       /* number of extra lines (negative when deleting) */
- {
-     if (buf->b_mod_set)
-     {
-       /* find the maximum area that must be redisplayed */
-       if (lnum < buf->b_mod_top)
-           buf->b_mod_top = lnum;
-       if (lnum < buf->b_mod_bot)
-       {
-           /* adjust old bot position for xtra lines */
-           buf->b_mod_bot += xtra;
-           if (buf->b_mod_bot < lnum)
-               buf->b_mod_bot = lnum;
-       }
-       if (lnume + xtra > buf->b_mod_bot)
-           buf->b_mod_bot = lnume + xtra;
-       buf->b_mod_xlines += xtra;
-     }
-     else
-     {
-       /* set the area that must be redisplayed */
-       buf->b_mod_set = TRUE;
-       buf->b_mod_top = lnum;
-       buf->b_mod_bot = lnume + xtra;
-       buf->b_mod_xlines = xtra;
-     }
- }
- 
- /*
-  * Common code for when a change is was made.
-  * See changed_lines() for the arguments.
-  * Careful: may trigger autocommands that reload the buffer.
-  */
-     static void
- changed_common(
-     linenr_T  lnum,
-     colnr_T   col,
-     linenr_T  lnume,
-     long      xtra)
- {
-     win_T     *wp;
-     tabpage_T *tp;
-     int               i;
- #ifdef FEAT_JUMPLIST
-     int               cols;
-     pos_T     *p;
-     int               add;
- #endif
- 
-     /* mark the buffer as modified */
-     changed();
- 
- #ifdef FEAT_DIFF
-     if (curwin->w_p_diff && diff_internal())
-       curtab->tp_diff_update = TRUE;
- #endif
- 
-     /* set the '. mark */
-     if (!cmdmod.keepjumps)
-     {
-       curbuf->b_last_change.lnum = lnum;
-       curbuf->b_last_change.col = col;
- 
- #ifdef FEAT_JUMPLIST
-       /* Create a new entry if a new undo-able change was started or we
-        * don't have an entry yet. */
-       if (curbuf->b_new_change || curbuf->b_changelistlen == 0)
-       {
-           if (curbuf->b_changelistlen == 0)
-               add = TRUE;
-           else
-           {
-               /* Don't create a new entry when the line number is the same
-                * as the last one and the column is not too far away.  Avoids
-                * creating many entries for typing "xxxxx". */
-               p = &curbuf->b_changelist[curbuf->b_changelistlen - 1];
-               if (p->lnum != lnum)
-                   add = TRUE;
-               else
-               {
-                   cols = comp_textwidth(FALSE);
-                   if (cols == 0)
-                       cols = 79;
-                   add = (p->col + cols < col || col + cols < p->col);
-               }
-           }
-           if (add)
-           {
-               /* This is the first of a new sequence of undo-able changes
-                * and it's at some distance of the last change.  Use a new
-                * position in the changelist. */
-               curbuf->b_new_change = FALSE;
- 
-               if (curbuf->b_changelistlen == JUMPLISTSIZE)
-               {
-                   /* changelist is full: remove oldest entry */
-                   curbuf->b_changelistlen = JUMPLISTSIZE - 1;
-                   mch_memmove(curbuf->b_changelist, curbuf->b_changelist + 1,
-                                         sizeof(pos_T) * (JUMPLISTSIZE - 1));
-                   FOR_ALL_TAB_WINDOWS(tp, wp)
-                   {
-                       /* Correct position in changelist for other windows on
-                        * this buffer. */
-                       if (wp->w_buffer == curbuf && wp->w_changelistidx > 0)
-                           --wp->w_changelistidx;
-                   }
-               }
-               FOR_ALL_TAB_WINDOWS(tp, wp)
-               {
-                   /* For other windows, if the position in the changelist is
-                    * at the end it stays at the end. */
-                   if (wp->w_buffer == curbuf
-                           && wp->w_changelistidx == curbuf->b_changelistlen)
-                       ++wp->w_changelistidx;
-               }
-               ++curbuf->b_changelistlen;
-           }
-       }
-       curbuf->b_changelist[curbuf->b_changelistlen - 1] =
-                                                       curbuf->b_last_change;
-       /* The current window is always after the last change, so that "g,"
-        * takes you back to it. */
-       curwin->w_changelistidx = curbuf->b_changelistlen;
- #endif
-     }
- 
-     FOR_ALL_TAB_WINDOWS(tp, wp)
-     {
-       if (wp->w_buffer == curbuf)
-       {
-           /* Mark this window to be redrawn later. */
-           if (wp->w_redr_type < VALID)
-               wp->w_redr_type = VALID;
- 
-           /* Check if a change in the buffer has invalidated the cached
-            * values for the cursor. */
- #ifdef FEAT_FOLDING
-           /*
-            * Update the folds for this window.  Can't postpone this, because
-            * a following operator might work on the whole fold: ">>dd".
-            */
-           foldUpdate(wp, lnum, lnume + xtra - 1);
- 
-           /* The change may cause lines above or below the change to become
-            * included in a fold.  Set lnum/lnume to the first/last line that
-            * might be displayed differently.
-            * Set w_cline_folded here as an efficient way to update it when
-            * inserting lines just above a closed fold. */
-           i = hasFoldingWin(wp, lnum, &lnum, NULL, FALSE, NULL);
-           if (wp->w_cursor.lnum == lnum)
-               wp->w_cline_folded = i;
-           i = hasFoldingWin(wp, lnume, NULL, &lnume, FALSE, NULL);
-           if (wp->w_cursor.lnum == lnume)
-               wp->w_cline_folded = i;
- 
-           /* If the changed line is in a range of previously folded lines,
-            * compare with the first line in that range. */
-           if (wp->w_cursor.lnum <= lnum)
-           {
-               i = find_wl_entry(wp, lnum);
-               if (i >= 0 && wp->w_cursor.lnum > wp->w_lines[i].wl_lnum)
-                   changed_line_abv_curs_win(wp);
-           }
- #endif
- 
-           if (wp->w_cursor.lnum > lnum)
-               changed_line_abv_curs_win(wp);
-           else if (wp->w_cursor.lnum == lnum && wp->w_cursor.col >= col)
-               changed_cline_bef_curs_win(wp);
-           if (wp->w_botline >= lnum)
-           {
-               /* Assume that botline doesn't change (inserted lines make
-                * other lines scroll down below botline). */
-               approximate_botline_win(wp);
-           }
- 
-           /* Check if any w_lines[] entries have become invalid.
-            * For entries below the change: Correct the lnums for
-            * inserted/deleted lines.  Makes it possible to stop displaying
-            * after the change. */
-           for (i = 0; i < wp->w_lines_valid; ++i)
-               if (wp->w_lines[i].wl_valid)
-               {
-                   if (wp->w_lines[i].wl_lnum >= lnum)
-                   {
-                       if (wp->w_lines[i].wl_lnum < lnume)
-                       {
-                           /* line included in change */
-                           wp->w_lines[i].wl_valid = FALSE;
-                       }
-                       else if (xtra != 0)
-                       {
-                           /* line below change */
-                           wp->w_lines[i].wl_lnum += xtra;
- #ifdef FEAT_FOLDING
-                           wp->w_lines[i].wl_lastlnum += xtra;
- #endif
-                       }
-                   }
- #ifdef FEAT_FOLDING
-                   else if (wp->w_lines[i].wl_lastlnum >= lnum)
-                   {
-                       /* change somewhere inside this range of folded lines,
-                        * may need to be redrawn */
-                       wp->w_lines[i].wl_valid = FALSE;
-                   }
- #endif
-               }
- 
- #ifdef FEAT_FOLDING
-           /* Take care of side effects for setting w_topline when folds have
-            * changed.  Esp. when the buffer was changed in another window. */
-           if (hasAnyFolding(wp))
-               set_topline(wp, wp->w_topline);
- #endif
-           /* relative numbering may require updating more */
-           if (wp->w_p_rnu)
-               redraw_win_later(wp, SOME_VALID);
-       }
-     }
- 
-     /* Call update_screen() later, which checks out what needs to be redrawn,
-      * since it notices b_mod_set and then uses b_mod_*. */
-     if (must_redraw < VALID)
-       must_redraw = VALID;
- 
-     /* when the cursor line is changed always trigger CursorMoved */
-     if (lnum <= curwin->w_cursor.lnum
-                && lnume + (xtra < 0 ? -xtra : xtra) > curwin->w_cursor.lnum)
-       last_cursormoved.lnum = 0;
- }
- 
- /*
-  * unchanged() is called when the changed flag must be reset for buffer 'buf'
-  */
-     void
- unchanged(
-     buf_T     *buf,
-     int               ff)     /* also reset 'fileformat' */
- {
-     if (buf->b_changed || (ff && file_ff_differs(buf, FALSE)))
-     {
-       buf->b_changed = 0;
-       ml_setflags(buf);
-       if (ff)
-           save_file_ff(buf);
-       check_status(buf);
-       redraw_tabline = TRUE;
- #ifdef FEAT_TITLE
-       need_maketitle = TRUE;      /* set window title later */
- #endif
-     }
-     ++CHANGEDTICK(buf);
- #ifdef FEAT_NETBEANS_INTG
-     netbeans_unmodified(buf);
- #endif
- }
- 
- /*
   * check_status: called when the status bars for the buffer 'buf'
   *             need to be updated
   */
--- 1110,1115 ----
***************
*** 3322,3382 ****
  }
  
  /*
-  * If the file is readonly, give a warning message with the first change.
-  * Don't do this for autocommands.
-  * Don't use emsg(), because it flushes the macro buffer.
-  * If we have undone all changes b_changed will be FALSE, but "b_did_warn"
-  * will be TRUE.
-  * Careful: may trigger autocommands that reload the buffer.
-  */
-     void
- change_warning(
-     int           col)                /* column for message; non-zero when in 
insert
-                                  mode and 'showmode' is on */
- {
-     static char *w_readonly = N_("W10: Warning: Changing a readonly file");
- 
-     if (curbuf->b_did_warn == FALSE
-           && curbufIsChanged() == 0
-           && !autocmd_busy
-           && curbuf->b_p_ro)
-     {
-       ++curbuf_lock;
-       apply_autocmds(EVENT_FILECHANGEDRO, NULL, NULL, FALSE, curbuf);
-       --curbuf_lock;
-       if (!curbuf->b_p_ro)
-           return;
-       /*
-        * Do what msg() does, but with a column offset if the warning should
-        * be after the mode message.
-        */
-       msg_start();
-       if (msg_row == Rows - 1)
-           msg_col = col;
-       msg_source(HL_ATTR(HLF_W));
-       msg_puts_attr(_(w_readonly), HL_ATTR(HLF_W) | MSG_HIST);
- #ifdef FEAT_EVAL
-       set_vim_var_string(VV_WARNINGMSG, (char_u *)_(w_readonly), -1);
- #endif
-       msg_clr_eos();
-       (void)msg_end();
-       if (msg_silent == 0 && !silent_mode
- #ifdef FEAT_EVAL
-               && time_for_testing != 1
- #endif
-               )
-       {
-           out_flush();
-           ui_delay(1000L, TRUE); /* give the user time to think about it */
-       }
-       curbuf->b_did_warn = TRUE;
-       redraw_cmdline = FALSE; /* don't redraw and erase the message */
-       if (msg_row < Rows - 1)
-           showmode();
-     }
- }
- 
- /*
   * Ask for a reply from the user, a 'y' or a 'n'.
   * No other characters are accepted, the message is repeated until a valid
   * reply is entered or CTRL-C is hit.
--- 1128,1133 ----
*** ../vim-8.1.1317/src/proto/misc1.pro 2019-02-13 22:45:21.512636158 +0100
--- src/proto/misc1.pro 2019-05-11 16:56:15.916698940 +0200
***************
*** 7,13 ****
  int set_indent(int size, int flags);
  int get_number_indent(linenr_T lnum);
  int get_breakindent_win(win_T *wp, char_u *line);
- int open_line(int dir, int flags, int second_line_indent);
  int get_leader_len(char_u *line, char_u **flags, int backward, int 
include_space);
  int get_last_leader_offset(char_u *line, char_u **flags);
  int plines(linenr_T lnum);
--- 7,12 ----
***************
*** 17,49 ****
  int plines_win_nofold(win_T *wp, linenr_T lnum);
  int plines_win_col(win_T *wp, linenr_T lnum, long column);
  int plines_m_win(win_T *wp, linenr_T first, linenr_T last);
- void ins_bytes(char_u *p);
- void ins_bytes_len(char_u *p, int len);
- void ins_char(int c);
- void ins_char_bytes(char_u *buf, int charlen);
- void ins_str(char_u *s);
- int del_char(int fixpos);
- int del_chars(long count, int fixpos);
- int del_bytes(long count, int fixpos_arg, int use_delcombine);
- int truncate_line(int fixpos);
- void del_lines(long nlines, int undo);
  int gchar_pos(pos_T *pos);
  int gchar_cursor(void);
  void pchar_cursor(int c);
  int inindent(int extra);
  char_u *skip_to_option_part(char_u *p);
- void changed(void);
- void changed_int(void);
- void changed_bytes(linenr_T lnum, colnr_T col);
- void inserted_bytes(linenr_T lnum, colnr_T col, int added);
- void appended_lines(linenr_T lnum, long count);
- void appended_lines_mark(linenr_T lnum, long count);
- void deleted_lines(linenr_T lnum, long count);
- void deleted_lines_mark(linenr_T lnum, long count);
- void changed_lines(linenr_T lnum, colnr_T col, linenr_T lnume, long xtra);
- void unchanged(buf_T *buf, int ff);
  void check_status(buf_T *buf);
- void change_warning(int col);
  int ask_yesno(char_u *str, int direct);
  int is_mouse_key(int c);
  int get_keystroke(void);
--- 16,27 ----
*** ../vim-8.1.1317/src/change.c        2019-05-11 17:02:59.034341075 +0200
--- src/change.c        2019-05-11 16:57:38.064209409 +0200
***************
*** 0 ****
--- 1,2165 ----
+ /* vi:set ts=8 sts=4 sw=4 noet:
+  *
+  * VIM - Vi IMproved  by Bram Moolenaar
+  *
+  * Do ":help uganda"  in Vim to read copying and usage conditions.
+  * Do ":help credits" in Vim to see a list of people who contributed.
+  * See README.txt for an overview of the Vim source code.
+  */
+ 
+ /*
+  * change.c: functions related to changing text
+  */
+ 
+ #include "vim.h"
+ 
+ /*
+  * If the file is readonly, give a warning message with the first change.
+  * Don't do this for autocommands.
+  * Doesn't use emsg(), because it flushes the macro buffer.
+  * If we have undone all changes b_changed will be FALSE, but "b_did_warn"
+  * will be TRUE.
+  * "col" is the column for the message; non-zero when in insert mode and
+  * 'showmode' is on.
+  * Careful: may trigger autocommands that reload the buffer.
+  */
+     void
+ change_warning(int col)
+ {
+     static char *w_readonly = N_("W10: Warning: Changing a readonly file");
+ 
+     if (curbuf->b_did_warn == FALSE
+           && curbufIsChanged() == 0
+           && !autocmd_busy
+           && curbuf->b_p_ro)
+     {
+       ++curbuf_lock;
+       apply_autocmds(EVENT_FILECHANGEDRO, NULL, NULL, FALSE, curbuf);
+       --curbuf_lock;
+       if (!curbuf->b_p_ro)
+           return;
+ 
+       // Do what msg() does, but with a column offset if the warning should
+       // be after the mode message.
+       msg_start();
+       if (msg_row == Rows - 1)
+           msg_col = col;
+       msg_source(HL_ATTR(HLF_W));
+       msg_puts_attr(_(w_readonly), HL_ATTR(HLF_W) | MSG_HIST);
+ #ifdef FEAT_EVAL
+       set_vim_var_string(VV_WARNINGMSG, (char_u *)_(w_readonly), -1);
+ #endif
+       msg_clr_eos();
+       (void)msg_end();
+       if (msg_silent == 0 && !silent_mode
+ #ifdef FEAT_EVAL
+               && time_for_testing != 1
+ #endif
+               )
+       {
+           out_flush();
+           ui_delay(1000L, TRUE); // give the user time to think about it
+       }
+       curbuf->b_did_warn = TRUE;
+       redraw_cmdline = FALSE; // don't redraw and erase the message
+       if (msg_row < Rows - 1)
+           showmode();
+     }
+ }
+ 
+ /*
+  * Call this function when something in the current buffer is changed.
+  *
+  * Most often called through changed_bytes() and changed_lines(), which also
+  * mark the area of the display to be redrawn.
+  *
+  * Careful: may trigger autocommands that reload the buffer.
+  */
+     void
+ changed(void)
+ {
+ #if defined(FEAT_XIM) && defined(FEAT_GUI_GTK)
+     if (p_imst == IM_ON_THE_SPOT)
+     {
+       // The text of the preediting area is inserted, but this doesn't
+       // mean a change of the buffer yet.  That is delayed until the
+       // text is committed. (this means preedit becomes empty)
+       if (im_is_preediting() && !xim_changed_while_preediting)
+           return;
+       xim_changed_while_preediting = FALSE;
+     }
+ #endif
+ 
+     if (!curbuf->b_changed)
+     {
+       int     save_msg_scroll = msg_scroll;
+ 
+       // Give a warning about changing a read-only file.  This may also
+       // check-out the file, thus change "curbuf"!
+       change_warning(0);
+ 
+       // Create a swap file if that is wanted.
+       // Don't do this for "nofile" and "nowrite" buffer types.
+       if (curbuf->b_may_swap
+ #ifdef FEAT_QUICKFIX
+               && !bt_dontwrite(curbuf)
+ #endif
+               )
+       {
+           int save_need_wait_return = need_wait_return;
+ 
+           need_wait_return = FALSE;
+           ml_open_file(curbuf);
+ 
+           // The ml_open_file() can cause an ATTENTION message.
+           // Wait two seconds, to make sure the user reads this unexpected
+           // message.  Since we could be anywhere, call wait_return() now,
+           // and don't let the emsg() set msg_scroll.
+           if (need_wait_return && emsg_silent == 0)
+           {
+               out_flush();
+               ui_delay(2000L, TRUE);
+               wait_return(TRUE);
+               msg_scroll = save_msg_scroll;
+           }
+           else
+               need_wait_return = save_need_wait_return;
+       }
+       changed_internal();
+     }
+     ++CHANGEDTICK(curbuf);
+ 
+ #ifdef FEAT_SEARCH_EXTRA
+     // If a pattern is highlighted, the position may now be invalid.
+     highlight_match = FALSE;
+ #endif
+ }
+ 
+ /*
+  * Internal part of changed(), no user interaction.
+  * Also used for recovery.
+  */
+     void
+ changed_internal(void)
+ {
+     curbuf->b_changed = TRUE;
+     ml_setflags(curbuf);
+     check_status(curbuf);
+     redraw_tabline = TRUE;
+ #ifdef FEAT_TITLE
+     need_maketitle = TRUE;        // set window title later
+ #endif
+ }
+ 
+ /*
+  * Common code for when a change was made.
+  * See changed_lines() for the arguments.
+  * Careful: may trigger autocommands that reload the buffer.
+  */
+     static void
+ changed_common(
+     linenr_T  lnum,
+     colnr_T   col,
+     linenr_T  lnume,
+     long      xtra)
+ {
+     win_T     *wp;
+     tabpage_T *tp;
+     int               i;
+ #ifdef FEAT_JUMPLIST
+     int               cols;
+     pos_T     *p;
+     int               add;
+ #endif
+ 
+     // mark the buffer as modified
+     changed();
+ 
+ #ifdef FEAT_DIFF
+     if (curwin->w_p_diff && diff_internal())
+       curtab->tp_diff_update = TRUE;
+ #endif
+ 
+     // set the '. mark
+     if (!cmdmod.keepjumps)
+     {
+       curbuf->b_last_change.lnum = lnum;
+       curbuf->b_last_change.col = col;
+ 
+ #ifdef FEAT_JUMPLIST
+       // Create a new entry if a new undo-able change was started or we
+       // don't have an entry yet.
+       if (curbuf->b_new_change || curbuf->b_changelistlen == 0)
+       {
+           if (curbuf->b_changelistlen == 0)
+               add = TRUE;
+           else
+           {
+               // Don't create a new entry when the line number is the same
+               // as the last one and the column is not too far away.  Avoids
+               // creating many entries for typing "xxxxx".
+               p = &curbuf->b_changelist[curbuf->b_changelistlen - 1];
+               if (p->lnum != lnum)
+                   add = TRUE;
+               else
+               {
+                   cols = comp_textwidth(FALSE);
+                   if (cols == 0)
+                       cols = 79;
+                   add = (p->col + cols < col || col + cols < p->col);
+               }
+           }
+           if (add)
+           {
+               // This is the first of a new sequence of undo-able changes
+               // and it's at some distance of the last change.  Use a new
+               // position in the changelist.
+               curbuf->b_new_change = FALSE;
+ 
+               if (curbuf->b_changelistlen == JUMPLISTSIZE)
+               {
+                   // changelist is full: remove oldest entry
+                   curbuf->b_changelistlen = JUMPLISTSIZE - 1;
+                   mch_memmove(curbuf->b_changelist, curbuf->b_changelist + 1,
+                                         sizeof(pos_T) * (JUMPLISTSIZE - 1));
+                   FOR_ALL_TAB_WINDOWS(tp, wp)
+                   {
+                       // Correct position in changelist for other windows on
+                       // this buffer.
+                       if (wp->w_buffer == curbuf && wp->w_changelistidx > 0)
+                           --wp->w_changelistidx;
+                   }
+               }
+               FOR_ALL_TAB_WINDOWS(tp, wp)
+               {
+                   // For other windows, if the position in the changelist is
+                   // at the end it stays at the end.
+                   if (wp->w_buffer == curbuf
+                           && wp->w_changelistidx == curbuf->b_changelistlen)
+                       ++wp->w_changelistidx;
+               }
+               ++curbuf->b_changelistlen;
+           }
+       }
+       curbuf->b_changelist[curbuf->b_changelistlen - 1] =
+                                                       curbuf->b_last_change;
+       // The current window is always after the last change, so that "g,"
+       // takes you back to it.
+       curwin->w_changelistidx = curbuf->b_changelistlen;
+ #endif
+     }
+ 
+     FOR_ALL_TAB_WINDOWS(tp, wp)
+     {
+       if (wp->w_buffer == curbuf)
+       {
+           // Mark this window to be redrawn later.
+           if (wp->w_redr_type < VALID)
+               wp->w_redr_type = VALID;
+ 
+           // Check if a change in the buffer has invalidated the cached
+           // values for the cursor.
+ #ifdef FEAT_FOLDING
+           // Update the folds for this window.  Can't postpone this, because
+           // a following operator might work on the whole fold: ">>dd".
+           foldUpdate(wp, lnum, lnume + xtra - 1);
+ 
+           // The change may cause lines above or below the change to become
+           // included in a fold.  Set lnum/lnume to the first/last line that
+           // might be displayed differently.
+           // Set w_cline_folded here as an efficient way to update it when
+           // inserting lines just above a closed fold.
+           i = hasFoldingWin(wp, lnum, &lnum, NULL, FALSE, NULL);
+           if (wp->w_cursor.lnum == lnum)
+               wp->w_cline_folded = i;
+           i = hasFoldingWin(wp, lnume, NULL, &lnume, FALSE, NULL);
+           if (wp->w_cursor.lnum == lnume)
+               wp->w_cline_folded = i;
+ 
+           // If the changed line is in a range of previously folded lines,
+           // compare with the first line in that range.
+           if (wp->w_cursor.lnum <= lnum)
+           {
+               i = find_wl_entry(wp, lnum);
+               if (i >= 0 && wp->w_cursor.lnum > wp->w_lines[i].wl_lnum)
+                   changed_line_abv_curs_win(wp);
+           }
+ #endif
+ 
+           if (wp->w_cursor.lnum > lnum)
+               changed_line_abv_curs_win(wp);
+           else if (wp->w_cursor.lnum == lnum && wp->w_cursor.col >= col)
+               changed_cline_bef_curs_win(wp);
+           if (wp->w_botline >= lnum)
+           {
+               // Assume that botline doesn't change (inserted lines make
+               // other lines scroll down below botline).
+               approximate_botline_win(wp);
+           }
+ 
+           // Check if any w_lines[] entries have become invalid.
+           // For entries below the change: Correct the lnums for
+           // inserted/deleted lines.  Makes it possible to stop displaying
+           // after the change.
+           for (i = 0; i < wp->w_lines_valid; ++i)
+               if (wp->w_lines[i].wl_valid)
+               {
+                   if (wp->w_lines[i].wl_lnum >= lnum)
+                   {
+                       if (wp->w_lines[i].wl_lnum < lnume)
+                       {
+                           // line included in change
+                           wp->w_lines[i].wl_valid = FALSE;
+                       }
+                       else if (xtra != 0)
+                       {
+                           // line below change
+                           wp->w_lines[i].wl_lnum += xtra;
+ #ifdef FEAT_FOLDING
+                           wp->w_lines[i].wl_lastlnum += xtra;
+ #endif
+                       }
+                   }
+ #ifdef FEAT_FOLDING
+                   else if (wp->w_lines[i].wl_lastlnum >= lnum)
+                   {
+                       // change somewhere inside this range of folded lines,
+                       // may need to be redrawn
+                       wp->w_lines[i].wl_valid = FALSE;
+                   }
+ #endif
+               }
+ 
+ #ifdef FEAT_FOLDING
+           // Take care of side effects for setting w_topline when folds have
+           // changed.  Esp. when the buffer was changed in another window.
+           if (hasAnyFolding(wp))
+               set_topline(wp, wp->w_topline);
+ #endif
+           // relative numbering may require updating more
+           if (wp->w_p_rnu)
+               redraw_win_later(wp, SOME_VALID);
+       }
+     }
+ 
+     // Call update_screen() later, which checks out what needs to be redrawn,
+     // since it notices b_mod_set and then uses b_mod_*.
+     if (must_redraw < VALID)
+       must_redraw = VALID;
+ 
+     // when the cursor line is changed always trigger CursorMoved
+     if (lnum <= curwin->w_cursor.lnum
+                && lnume + (xtra < 0 ? -xtra : xtra) > curwin->w_cursor.lnum)
+       last_cursormoved.lnum = 0;
+ }
+ 
+     static void
+ changedOneline(buf_T *buf, linenr_T lnum)
+ {
+     if (buf->b_mod_set)
+     {
+       // find the maximum area that must be redisplayed
+       if (lnum < buf->b_mod_top)
+           buf->b_mod_top = lnum;
+       else if (lnum >= buf->b_mod_bot)
+           buf->b_mod_bot = lnum + 1;
+     }
+     else
+     {
+       // set the area that must be redisplayed to one line
+       buf->b_mod_set = TRUE;
+       buf->b_mod_top = lnum;
+       buf->b_mod_bot = lnum + 1;
+       buf->b_mod_xlines = 0;
+     }
+ }
+ 
+ /*
+  * Changed bytes within a single line for the current buffer.
+  * - marks the windows on this buffer to be redisplayed
+  * - marks the buffer changed by calling changed()
+  * - invalidates cached values
+  * Careful: may trigger autocommands that reload the buffer.
+  */
+     void
+ changed_bytes(linenr_T lnum, colnr_T col)
+ {
+     changedOneline(curbuf, lnum);
+     changed_common(lnum, col, lnum + 1, 0L);
+ 
+ #ifdef FEAT_DIFF
+     // Diff highlighting in other diff windows may need to be updated too.
+     if (curwin->w_p_diff)
+     {
+       win_T       *wp;
+       linenr_T    wlnum;
+ 
+       FOR_ALL_WINDOWS(wp)
+           if (wp->w_p_diff && wp != curwin)
+           {
+               redraw_win_later(wp, VALID);
+               wlnum = diff_lnum_win(lnum, wp);
+               if (wlnum > 0)
+                   changedOneline(wp->w_buffer, wlnum);
+           }
+     }
+ #endif
+ }
+ 
+ /*
+  * Like changed_bytes() but also adjust text properties for "added" bytes.
+  * When "added" is negative text was deleted.
+  */
+     void
+ inserted_bytes(linenr_T lnum, colnr_T col, int added UNUSED)
+ {
+     changed_bytes(lnum, col);
+ 
+ #ifdef FEAT_TEXT_PROP
+     if (curbuf->b_has_textprop && added != 0)
+       adjust_prop_columns(lnum, col, added);
+ #endif
+ }
+ 
+ /*
+  * Appended "count" lines below line "lnum" in the current buffer.
+  * Must be called AFTER the change and after mark_adjust().
+  * Takes care of marking the buffer to be redrawn and sets the changed flag.
+  */
+     void
+ appended_lines(linenr_T lnum, long count)
+ {
+     changed_lines(lnum + 1, 0, lnum + 1, count);
+ }
+ 
+ /*
+  * Like appended_lines(), but adjust marks first.
+  */
+     void
+ appended_lines_mark(linenr_T lnum, long count)
+ {
+     // Skip mark_adjust when adding a line after the last one, there can't
+     // be marks there. But it's still needed in diff mode.
+     if (lnum + count < curbuf->b_ml.ml_line_count
+ #ifdef FEAT_DIFF
+           || curwin->w_p_diff
+ #endif
+       )
+       mark_adjust(lnum + 1, (linenr_T)MAXLNUM, count, 0L);
+     changed_lines(lnum + 1, 0, lnum + 1, count);
+ }
+ 
+ /*
+  * Deleted "count" lines at line "lnum" in the current buffer.
+  * Must be called AFTER the change and after mark_adjust().
+  * Takes care of marking the buffer to be redrawn and sets the changed flag.
+  */
+     void
+ deleted_lines(linenr_T lnum, long count)
+ {
+     changed_lines(lnum, 0, lnum + count, -count);
+ }
+ 
+ /*
+  * Like deleted_lines(), but adjust marks first.
+  * Make sure the cursor is on a valid line before calling, a GUI callback may
+  * be triggered to display the cursor.
+  */
+     void
+ deleted_lines_mark(linenr_T lnum, long count)
+ {
+     mark_adjust(lnum, (linenr_T)(lnum + count - 1), (long)MAXLNUM, -count);
+     changed_lines(lnum, 0, lnum + count, -count);
+ }
+ 
+ /*
+  * Marks the area to be redrawn after a change.
+  */
+     static void
+ changed_lines_buf(
+     buf_T     *buf,
+     linenr_T  lnum,       // first line with change
+     linenr_T  lnume,      // line below last changed line
+     long      xtra)       // number of extra lines (negative when deleting)
+ {
+     if (buf->b_mod_set)
+     {
+       // find the maximum area that must be redisplayed
+       if (lnum < buf->b_mod_top)
+           buf->b_mod_top = lnum;
+       if (lnum < buf->b_mod_bot)
+       {
+           // adjust old bot position for xtra lines
+           buf->b_mod_bot += xtra;
+           if (buf->b_mod_bot < lnum)
+               buf->b_mod_bot = lnum;
+       }
+       if (lnume + xtra > buf->b_mod_bot)
+           buf->b_mod_bot = lnume + xtra;
+       buf->b_mod_xlines += xtra;
+     }
+     else
+     {
+       // set the area that must be redisplayed
+       buf->b_mod_set = TRUE;
+       buf->b_mod_top = lnum;
+       buf->b_mod_bot = lnume + xtra;
+       buf->b_mod_xlines = xtra;
+     }
+ }
+ 
+ /*
+  * Changed lines for the current buffer.
+  * Must be called AFTER the change and after mark_adjust().
+  * - mark the buffer changed by calling changed()
+  * - mark the windows on this buffer to be redisplayed
+  * - invalidate cached values
+  * "lnum" is the first line that needs displaying, "lnume" the first line
+  * below the changed lines (BEFORE the change).
+  * When only inserting lines, "lnum" and "lnume" are equal.
+  * Takes care of calling changed() and updating b_mod_*.
+  * Careful: may trigger autocommands that reload the buffer.
+  */
+     void
+ changed_lines(
+     linenr_T  lnum,       // first line with change
+     colnr_T   col,        // column in first line with change
+     linenr_T  lnume,      // line below last changed line
+     long      xtra)       // number of extra lines (negative when deleting)
+ {
+     changed_lines_buf(curbuf, lnum, lnume, xtra);
+ 
+ #ifdef FEAT_DIFF
+     if (xtra == 0 && curwin->w_p_diff && !diff_internal())
+     {
+       // When the number of lines doesn't change then mark_adjust() isn't
+       // called and other diff buffers still need to be marked for
+       // displaying.
+       win_T       *wp;
+       linenr_T    wlnum;
+ 
+       FOR_ALL_WINDOWS(wp)
+           if (wp->w_p_diff && wp != curwin)
+           {
+               redraw_win_later(wp, VALID);
+               wlnum = diff_lnum_win(lnum, wp);
+               if (wlnum > 0)
+                   changed_lines_buf(wp->w_buffer, wlnum,
+                                                   lnume - lnum + wlnum, 0L);
+           }
+     }
+ #endif
+ 
+     changed_common(lnum, col, lnume, xtra);
+ }
+ 
+ /*
+  * Called when the changed flag must be reset for buffer "buf".
+  * When "ff" is TRUE also reset 'fileformat'.
+  */
+     void
+ unchanged(buf_T *buf, int ff)
+ {
+     if (buf->b_changed || (ff && file_ff_differs(buf, FALSE)))
+     {
+       buf->b_changed = 0;
+       ml_setflags(buf);
+       if (ff)
+           save_file_ff(buf);
+       check_status(buf);
+       redraw_tabline = TRUE;
+ #ifdef FEAT_TITLE
+       need_maketitle = TRUE;      // set window title later
+ #endif
+     }
+     ++CHANGEDTICK(buf);
+ #ifdef FEAT_NETBEANS_INTG
+     netbeans_unmodified(buf);
+ #endif
+ }
+ 
+ /*
+  * Insert string "p" at the cursor position.  Stops at a NUL byte.
+  * Handles Replace mode and multi-byte characters.
+  */
+     void
+ ins_bytes(char_u *p)
+ {
+     ins_bytes_len(p, (int)STRLEN(p));
+ }
+ 
+ /*
+  * Insert string "p" with length "len" at the cursor position.
+  * Handles Replace mode and multi-byte characters.
+  */
+     void
+ ins_bytes_len(char_u *p, int len)
+ {
+     int               i;
+     int               n;
+ 
+     if (has_mbyte)
+       for (i = 0; i < len; i += n)
+       {
+           if (enc_utf8)
+               // avoid reading past p[len]
+               n = utfc_ptr2len_len(p + i, len - i);
+           else
+               n = (*mb_ptr2len)(p + i);
+           ins_char_bytes(p + i, n);
+       }
+     else
+       for (i = 0; i < len; ++i)
+           ins_char(p[i]);
+ }
+ 
+ /*
+  * Insert or replace a single character at the cursor position.
+  * When in REPLACE or VREPLACE mode, replace any existing character.
+  * Caller must have prepared for undo.
+  * For multi-byte characters we get the whole character, the caller must
+  * convert bytes to a character.
+  */
+     void
+ ins_char(int c)
+ {
+     char_u    buf[MB_MAXBYTES + 1];
+     int               n = (*mb_char2bytes)(c, buf);
+ 
+     // When "c" is 0x100, 0x200, etc. we don't want to insert a NUL byte.
+     // Happens for CTRL-Vu9900.
+     if (buf[0] == 0)
+       buf[0] = '\n';
+ 
+     ins_char_bytes(buf, n);
+ }
+ 
+     void
+ ins_char_bytes(char_u *buf, int charlen)
+ {
+     int               c = buf[0];
+     int               newlen;         // nr of bytes inserted
+     int               oldlen;         // nr of bytes deleted (0 when not 
replacing)
+     char_u    *p;
+     char_u    *newp;
+     char_u    *oldp;
+     int               linelen;        // length of old line including NUL
+     colnr_T   col;
+     linenr_T  lnum = curwin->w_cursor.lnum;
+     int               i;
+ 
+     // Break tabs if needed.
+     if (virtual_active() && curwin->w_cursor.coladd > 0)
+       coladvance_force(getviscol());
+ 
+     col = curwin->w_cursor.col;
+     oldp = ml_get(lnum);
+     linelen = (int)STRLEN(oldp) + 1;
+ 
+     // The lengths default to the values for when not replacing.
+     oldlen = 0;
+     newlen = charlen;
+ 
+     if (State & REPLACE_FLAG)
+     {
+       if (State & VREPLACE_FLAG)
+       {
+           colnr_T     new_vcol = 0;   // init for GCC
+           colnr_T     vcol;
+           int         old_list;
+ 
+           // Disable 'list' temporarily, unless 'cpo' contains the 'L' flag.
+           // Returns the old value of list, so when finished,
+           // curwin->w_p_list should be set back to this.
+           old_list = curwin->w_p_list;
+           if (old_list && vim_strchr(p_cpo, CPO_LISTWM) == NULL)
+               curwin->w_p_list = FALSE;
+ 
+           // In virtual replace mode each character may replace one or more
+           // characters (zero if it's a TAB).  Count the number of bytes to
+           // be deleted to make room for the new character, counting screen
+           // cells.  May result in adding spaces to fill a gap.
+           getvcol(curwin, &curwin->w_cursor, NULL, &vcol, NULL);
+           new_vcol = vcol + chartabsize(buf, vcol);
+           while (oldp[col + oldlen] != NUL && vcol < new_vcol)
+           {
+               vcol += chartabsize(oldp + col + oldlen, vcol);
+               // Don't need to remove a TAB that takes us to the right
+               // position.
+               if (vcol > new_vcol && oldp[col + oldlen] == TAB)
+                   break;
+               oldlen += (*mb_ptr2len)(oldp + col + oldlen);
+               // Deleted a bit too much, insert spaces.
+               if (vcol > new_vcol)
+                   newlen += vcol - new_vcol;
+           }
+           curwin->w_p_list = old_list;
+       }
+       else if (oldp[col] != NUL)
+       {
+           // normal replace
+           oldlen = (*mb_ptr2len)(oldp + col);
+       }
+ 
+ 
+       // Push the replaced bytes onto the replace stack, so that they can be
+       // put back when BS is used.  The bytes of a multi-byte character are
+       // done the other way around, so that the first byte is popped off
+       // first (it tells the byte length of the character).
+       replace_push(NUL);
+       for (i = 0; i < oldlen; ++i)
+       {
+           if (has_mbyte)
+               i += replace_push_mb(oldp + col + i) - 1;
+           else
+               replace_push(oldp[col + i]);
+       }
+     }
+ 
+     newp = alloc_check((unsigned)(linelen + newlen - oldlen));
+     if (newp == NULL)
+       return;
+ 
+     // Copy bytes before the cursor.
+     if (col > 0)
+       mch_memmove(newp, oldp, (size_t)col);
+ 
+     // Copy bytes after the changed character(s).
+     p = newp + col;
+     if (linelen > col + oldlen)
+       mch_memmove(p + newlen, oldp + col + oldlen,
+                                           (size_t)(linelen - col - oldlen));
+ 
+     // Insert or overwrite the new character.
+     mch_memmove(p, buf, charlen);
+     i = charlen;
+ 
+     // Fill with spaces when necessary.
+     while (i < newlen)
+       p[i++] = ' ';
+ 
+     // Replace the line in the buffer.
+     ml_replace(lnum, newp, FALSE);
+ 
+     // mark the buffer as changed and prepare for displaying
+     inserted_bytes(lnum, col, newlen - oldlen);
+ 
+     // If we're in Insert or Replace mode and 'showmatch' is set, then briefly
+     // show the match for right parens and braces.
+     if (p_sm && (State & INSERT)
+           && msg_silent == 0
+ #ifdef FEAT_INS_EXPAND
+           && !ins_compl_active()
+ #endif
+        )
+     {
+       if (has_mbyte)
+           showmatch(mb_ptr2char(buf));
+       else
+           showmatch(c);
+     }
+ 
+ #ifdef FEAT_RIGHTLEFT
+     if (!p_ri || (State & REPLACE_FLAG))
+ #endif
+     {
+       // Normal insert: move cursor right
+       curwin->w_cursor.col += charlen;
+     }
+ 
+     // TODO: should try to update w_row here, to avoid recomputing it later.
+ }
+ 
+ /*
+  * Insert a string at the cursor position.
+  * Note: Does NOT handle Replace mode.
+  * Caller must have prepared for undo.
+  */
+     void
+ ins_str(char_u *s)
+ {
+     char_u    *oldp, *newp;
+     int               newlen = (int)STRLEN(s);
+     int               oldlen;
+     colnr_T   col;
+     linenr_T  lnum = curwin->w_cursor.lnum;
+ 
+     if (virtual_active() && curwin->w_cursor.coladd > 0)
+       coladvance_force(getviscol());
+ 
+     col = curwin->w_cursor.col;
+     oldp = ml_get(lnum);
+     oldlen = (int)STRLEN(oldp);
+ 
+     newp = alloc_check((unsigned)(oldlen + newlen + 1));
+     if (newp == NULL)
+       return;
+     if (col > 0)
+       mch_memmove(newp, oldp, (size_t)col);
+     mch_memmove(newp + col, s, (size_t)newlen);
+     mch_memmove(newp + col + newlen, oldp + col, (size_t)(oldlen - col + 1));
+     ml_replace(lnum, newp, FALSE);
+     inserted_bytes(lnum, col, newlen);
+     curwin->w_cursor.col += newlen;
+ }
+ 
+ /*
+  * Delete one character under the cursor.
+  * If "fixpos" is TRUE, don't leave the cursor on the NUL after the line.
+  * Caller must have prepared for undo.
+  *
+  * return FAIL for failure, OK otherwise
+  */
+     int
+ del_char(int fixpos)
+ {
+     if (has_mbyte)
+     {
+       // Make sure the cursor is at the start of a character.
+       mb_adjust_cursor();
+       if (*ml_get_cursor() == NUL)
+           return FAIL;
+       return del_chars(1L, fixpos);
+     }
+     return del_bytes(1L, fixpos, TRUE);
+ }
+ 
+ /*
+  * Like del_bytes(), but delete characters instead of bytes.
+  */
+     int
+ del_chars(long count, int fixpos)
+ {
+     long      bytes = 0;
+     long      i;
+     char_u    *p;
+     int               l;
+ 
+     p = ml_get_cursor();
+     for (i = 0; i < count && *p != NUL; ++i)
+     {
+       l = (*mb_ptr2len)(p);
+       bytes += l;
+       p += l;
+     }
+     return del_bytes(bytes, fixpos, TRUE);
+ }
+ 
+ /*
+  * Delete "count" bytes under the cursor.
+  * If "fixpos" is TRUE, don't leave the cursor on the NUL after the line.
+  * Caller must have prepared for undo.
+  *
+  * Return FAIL for failure, OK otherwise.
+  */
+     int
+ del_bytes(
+     long      count,
+     int               fixpos_arg,
+     int               use_delcombine UNUSED)      // 'delcombine' option 
applies
+ {
+     char_u    *oldp, *newp;
+     colnr_T   oldlen;
+     colnr_T   newlen;
+     linenr_T  lnum = curwin->w_cursor.lnum;
+     colnr_T   col = curwin->w_cursor.col;
+     int               alloc_newp;
+     long      movelen;
+     int               fixpos = fixpos_arg;
+ 
+     oldp = ml_get(lnum);
+     oldlen = (int)STRLEN(oldp);
+ 
+     // Can't do anything when the cursor is on the NUL after the line.
+     if (col >= oldlen)
+       return FAIL;
+ 
+     // If "count" is zero there is nothing to do.
+     if (count == 0)
+       return OK;
+ 
+     // If "count" is negative the caller must be doing something wrong.
+     if (count < 1)
+     {
+       siemsg("E950: Invalid count for del_bytes(): %ld", count);
+       return FAIL;
+     }
+ 
+     // If 'delcombine' is set and deleting (less than) one character, only
+     // delete the last combining character.
+     if (p_deco && use_delcombine && enc_utf8
+                                        && utfc_ptr2len(oldp + col) >= count)
+     {
+       int     cc[MAX_MCO];
+       int     n;
+ 
+       (void)utfc_ptr2char(oldp + col, cc);
+       if (cc[0] != NUL)
+       {
+           // Find the last composing char, there can be several.
+           n = col;
+           do
+           {
+               col = n;
+               count = utf_ptr2len(oldp + n);
+               n += count;
+           } while (UTF_COMPOSINGLIKE(oldp + col, oldp + n));
+           fixpos = 0;
+       }
+     }
+ 
+     // When count is too big, reduce it.
+     movelen = (long)oldlen - (long)col - count + 1; // includes trailing NUL
+     if (movelen <= 1)
+     {
+       // If we just took off the last character of a non-blank line, and
+       // fixpos is TRUE, we don't want to end up positioned at the NUL,
+       // unless "restart_edit" is set or 'virtualedit' contains "onemore".
+       if (col > 0 && fixpos && restart_edit == 0
+                                             && (ve_flags & VE_ONEMORE) == 0)
+       {
+           --curwin->w_cursor.col;
+           curwin->w_cursor.coladd = 0;
+           if (has_mbyte)
+               curwin->w_cursor.col -=
+                           (*mb_head_off)(oldp, oldp + curwin->w_cursor.col);
+       }
+       count = oldlen - col;
+       movelen = 1;
+     }
+     newlen = oldlen - count;
+ 
+     // If the old line has been allocated the deletion can be done in the
+     // existing line. Otherwise a new line has to be allocated
+     // Can't do this when using Netbeans, because we would need to invoke
+     // netbeans_removed(), which deallocates the line.  Let ml_replace() take
+     // care of notifying Netbeans.
+ #ifdef FEAT_NETBEANS_INTG
+     if (netbeans_active())
+       alloc_newp = TRUE;
+     else
+ #endif
+       alloc_newp = !ml_line_alloced();    // check if oldp was allocated
+     if (!alloc_newp)
+       newp = oldp;                        // use same allocated memory
+     else
+     {                                     // need to allocate a new line
+       newp = alloc((unsigned)(newlen + 1));
+       if (newp == NULL)
+           return FAIL;
+       mch_memmove(newp, oldp, (size_t)col);
+     }
+     mch_memmove(newp + col, oldp + col + count, (size_t)movelen);
+     if (alloc_newp)
+       ml_replace(lnum, newp, FALSE);
+ #ifdef FEAT_TEXT_PROP
+     else
+     {
+       // Also move any following text properties.
+       if (oldlen + 1 < curbuf->b_ml.ml_line_len)
+           mch_memmove(newp + newlen + 1, oldp + oldlen + 1,
+                              (size_t)curbuf->b_ml.ml_line_len - oldlen - 1);
+       curbuf->b_ml.ml_line_len -= count;
+     }
+ #endif
+ 
+     // mark the buffer as changed and prepare for displaying
+     inserted_bytes(lnum, curwin->w_cursor.col, -count);
+ 
+     return OK;
+ }
+ 
+ /*
+  * 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.
+  */
+     static 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
+ 
+     // 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)
+           {
+ #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
+           }
+           else
+           {
+               --todo;
+               ++ind_done;
+ #ifdef FEAT_VARTABS
+               ++ind_col;
+ #endif
+           }
+           ++ind_len;
+           if (p != NULL)
+               *p++ = *s;
+           ++s;
+       }
+ 
+       // 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 (;;)
+           {
+               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
+           while (todo >= (int)curbuf->b_p_ts)
+           {
+               todo -= (int)curbuf->b_p_ts;
+               ++ind_len;
+               if (p != NULL)
+                   *p++ = TAB;
+           }
+ #endif
+       }
+ 
+       // Count/add spaces required for indent
+       while (todo > 0)
+       {
+           --todo;
+           ++ind_len;
+           if (p != NULL)
+               *p++ = ' ';
+       }
+ 
+       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;
+       }
+     }
+ 
+     // Append the original line
+     mch_memmove(p, ml_get_curline(), (size_t)line_len);
+ 
+     // Replace the line
+     ml_replace(curwin->w_cursor.lnum, line, FALSE);
+ 
+     // Put the cursor after the indent.
+     curwin->w_cursor.col = ind_len;
+     return TRUE;
+ }
+ 
+ /*
+  * open_line: Add a new line below or above the current line.
+  *
+  * For VREPLACE mode, we only add a new line when we get to the end of the
+  * file, otherwise we just start replacing the next line.
+  *
+  * Caller must take care of undo.  Since VREPLACE may affect any number of
+  * lines however, it may call u_save_cursor() again when starting to change a
+  * new line.
+  * "flags": OPENLINE_DELSPACES        delete spaces after cursor
+  *        OPENLINE_DO_COM     format comments
+  *        OPENLINE_KEEPTRAIL  keep trailing spaces
+  *        OPENLINE_MARKFIX    adjust mark positions after the line break
+  *        OPENLINE_COM_LIST   format comments with list or 2nd line indent
+  *
+  * "second_line_indent": indent for after ^^D in Insert mode or if flag
+  *                      OPENLINE_COM_LIST
+  *
+  * Return OK for success, FAIL for failure
+  */
+     int
+ open_line(
+     int               dir,            // FORWARD or BACKWARD
+     int               flags,
+     int               second_line_indent)
+ {
+     char_u    *saved_line;            // copy of the original line
+     char_u    *next_line = NULL;      // copy of the next line
+     char_u    *p_extra = NULL;        // what goes to next line
+     int               less_cols = 0;          // less columns for mark in new 
line
+     int               less_cols_off = 0;      // columns to skip for mark 
adjust
+     pos_T     old_cursor;             // old cursor position
+     int               newcol = 0;             // new cursor column
+     int               newindent = 0;          // auto-indent of the new line
+     int               n;
+     int               trunc_line = FALSE;     // truncate current line 
afterwards
+     int               retval = FAIL;          // return value
+ #ifdef FEAT_COMMENTS
+     int               extra_len = 0;          // length of p_extra string
+     int               lead_len;               // length of comment leader
+     char_u    *lead_flags;    // position in 'comments' for comment leader
+     char_u    *leader = NULL;         // copy of comment leader
+ #endif
+     char_u    *allocated = NULL;      // allocated memory
+     char_u    *p;
+     int               saved_char = NUL;       // init for GCC
+ #if defined(FEAT_SMARTINDENT) || defined(FEAT_COMMENTS)
+     pos_T     *pos;
+ #endif
+ #ifdef FEAT_SMARTINDENT
+     int               do_si = (!p_paste && curbuf->b_p_si
+ # ifdef FEAT_CINDENT
+                                       && !curbuf->b_p_cin
+ # endif
+ # ifdef FEAT_EVAL
+                                       && *curbuf->b_p_inde == NUL
+ # endif
+                       );
+     int               no_si = FALSE;          // reset did_si afterwards
+     int               first_char = NUL;       // init for GCC
+ #endif
+ #if defined(FEAT_LISP) || defined(FEAT_CINDENT)
+     int               vreplace_mode;
+ #endif
+     int               did_append;             // appended a new line
+     int               saved_pi = curbuf->b_p_pi; // copy of preserveindent 
setting
+ 
+     // make a copy of the current line so we can mess with it
+     saved_line = vim_strsave(ml_get_curline());
+     if (saved_line == NULL)       /* out of memory! */
+       return FALSE;
+ 
+     if (State & VREPLACE_FLAG)
+     {
+       // With VREPLACE we make a copy of the next line, which we will be
+       // starting to replace.  First make the new line empty and let vim play
+       // with the indenting and comment leader to its heart's content.  Then
+       // we grab what it ended up putting on the new line, put back the
+       // original line, and call ins_char() to put each new character onto
+       // the line, replacing what was there before and pushing the right
+       // stuff onto the replace stack.  -- webb.
+       if (curwin->w_cursor.lnum < orig_line_count)
+           next_line = vim_strsave(ml_get(curwin->w_cursor.lnum + 1));
+       else
+           next_line = vim_strsave((char_u *)"");
+       if (next_line == NULL)      // out of memory!
+           goto theend;
+ 
+       // In VREPLACE mode, a NL replaces the rest of the line, and starts
+       // replacing the next line, so push all of the characters left on the
+       // line onto the replace stack.  We'll push any other characters that
+       // might be replaced at the start of the next line (due to autoindent
+       // etc) a bit later.
+       replace_push(NUL);  // Call twice because BS over NL expects it
+       replace_push(NUL);
+       p = saved_line + curwin->w_cursor.col;
+       while (*p != NUL)
+       {
+           if (has_mbyte)
+               p += replace_push_mb(p);
+           else
+               replace_push(*p++);
+       }
+       saved_line[curwin->w_cursor.col] = NUL;
+     }
+ 
+     if ((State & INSERT) && !(State & VREPLACE_FLAG))
+     {
+       p_extra = saved_line + curwin->w_cursor.col;
+ #ifdef FEAT_SMARTINDENT
+       if (do_si)              // need first char after new line break
+       {
+           p = skipwhite(p_extra);
+           first_char = *p;
+       }
+ #endif
+ #ifdef FEAT_COMMENTS
+       extra_len = (int)STRLEN(p_extra);
+ #endif
+       saved_char = *p_extra;
+       *p_extra = NUL;
+     }
+ 
+     u_clearline();            // cannot do "U" command when adding lines
+ #ifdef FEAT_SMARTINDENT
+     did_si = FALSE;
+ #endif
+     ai_col = 0;
+ 
+     // If we just did an auto-indent, then we didn't type anything on
+     // the prior line, and it should be truncated.  Do this even if 'ai' is 
not
+     // set because automatically inserting a comment leader also sets did_ai.
+     if (dir == FORWARD && did_ai)
+       trunc_line = TRUE;
+ 
+     // If 'autoindent' and/or 'smartindent' is set, try to figure out what
+     // indent to use for the new line.
+     if (curbuf->b_p_ai
+ #ifdef FEAT_SMARTINDENT
+                       || do_si
+ #endif
+                                           )
+     {
+       // count white space on current line
+ #ifdef FEAT_VARTABS
+       newindent = get_indent_str_vtab(saved_line, curbuf->b_p_ts,
+                                                curbuf->b_p_vts_array, FALSE);
+ #else
+       newindent = get_indent_str(saved_line, (int)curbuf->b_p_ts, FALSE);
+ #endif
+       if (newindent == 0 && !(flags & OPENLINE_COM_LIST))
+           newindent = second_line_indent; // for ^^D command in insert mode
+ 
+ #ifdef FEAT_SMARTINDENT
+       // Do smart indenting.
+       // In insert/replace mode (only when dir == FORWARD)
+       // we may move some text to the next line. If it starts with '{'
+       // don't add an indent. Fixes inserting a NL before '{' in line
+       //      "if (condition) {"
+       if (!trunc_line && do_si && *saved_line != NUL
+                                   && (p_extra == NULL || first_char != '{'))
+       {
+           char_u  *ptr;
+           char_u  last_char;
+ 
+           old_cursor = curwin->w_cursor;
+           ptr = saved_line;
+ # ifdef FEAT_COMMENTS
+           if (flags & OPENLINE_DO_COM)
+               lead_len = get_leader_len(ptr, NULL, FALSE, TRUE);
+           else
+               lead_len = 0;
+ # endif
+           if (dir == FORWARD)
+           {
+               // Skip preprocessor directives, unless they are
+               // recognised as comments.
+               if (
+ # ifdef FEAT_COMMENTS
+                       lead_len == 0 &&
+ # endif
+                       ptr[0] == '#')
+               {
+                   while (ptr[0] == '#' && curwin->w_cursor.lnum > 1)
+                       ptr = ml_get(--curwin->w_cursor.lnum);
+                   newindent = get_indent();
+               }
+ # ifdef FEAT_COMMENTS
+               if (flags & OPENLINE_DO_COM)
+                   lead_len = get_leader_len(ptr, NULL, FALSE, TRUE);
+               else
+                   lead_len = 0;
+               if (lead_len > 0)
+               {
+                   // This case gets the following right:
+                   //      /*
+                   //       * A comment (read '\' as '/').
+                   //       */
+                   // #define IN_THE_WAY
+                   //      This should line up here;
+                   p = skipwhite(ptr);
+                   if (p[0] == '/' && p[1] == '*')
+                       p++;
+                   if (p[0] == '*')
+                   {
+                       for (p++; *p; p++)
+                       {
+                           if (p[0] == '/' && p[-1] == '*')
+                           {
+                               // End of C comment, indent should line up
+                               // with the line containing the start of
+                               // the comment
+                               curwin->w_cursor.col = (colnr_T)(p - ptr);
+                               if ((pos = findmatch(NULL, NUL)) != NULL)
+                               {
+                                   curwin->w_cursor.lnum = pos->lnum;
+                                   newindent = get_indent();
+                               }
+                           }
+                       }
+                   }
+               }
+               else    // Not a comment line
+ # endif
+               {
+                   // Find last non-blank in line
+                   p = ptr + STRLEN(ptr) - 1;
+                   while (p > ptr && VIM_ISWHITE(*p))
+                       --p;
+                   last_char = *p;
+ 
+                   // find the character just before the '{' or ';'
+                   if (last_char == '{' || last_char == ';')
+                   {
+                       if (p > ptr)
+                           --p;
+                       while (p > ptr && VIM_ISWHITE(*p))
+                           --p;
+                   }
+                   // Try to catch lines that are split over multiple
+                   // lines.  eg:
+                   //      if (condition &&
+                   //                  condition) {
+                   //          Should line up here!
+                   //      }
+                   if (*p == ')')
+                   {
+                       curwin->w_cursor.col = (colnr_T)(p - ptr);
+                       if ((pos = findmatch(NULL, '(')) != NULL)
+                       {
+                           curwin->w_cursor.lnum = pos->lnum;
+                           newindent = get_indent();
+                           ptr = ml_get_curline();
+                       }
+                   }
+                   // If last character is '{' do indent, without
+                   // checking for "if" and the like.
+                   if (last_char == '{')
+                   {
+                       did_si = TRUE;  // do indent
+                       no_si = TRUE;   // don't delete it when '{' typed
+                   }
+                   // Look for "if" and the like, use 'cinwords'.
+                   // Don't do this if the previous line ended in ';' or
+                   // '}'.
+                   else if (last_char != ';' && last_char != '}'
+                                                      && cin_is_cinword(ptr))
+                       did_si = TRUE;
+               }
+           }
+           else // dir == BACKWARD
+           {
+               // Skip preprocessor directives, unless they are
+               // recognised as comments.
+               if (
+ # ifdef FEAT_COMMENTS
+                       lead_len == 0 &&
+ # endif
+                       ptr[0] == '#')
+               {
+                   int was_backslashed = FALSE;
+ 
+                   while ((ptr[0] == '#' || was_backslashed) &&
+                        curwin->w_cursor.lnum < curbuf->b_ml.ml_line_count)
+                   {
+                       if (*ptr && ptr[STRLEN(ptr) - 1] == '\\')
+                           was_backslashed = TRUE;
+                       else
+                           was_backslashed = FALSE;
+                       ptr = ml_get(++curwin->w_cursor.lnum);
+                   }
+                   if (was_backslashed)
+                       newindent = 0;      // Got to end of file
+                   else
+                       newindent = get_indent();
+               }
+               p = skipwhite(ptr);
+               if (*p == '}')      // if line starts with '}': do indent
+                   did_si = TRUE;
+               else                // can delete indent when '{' typed
+                   can_si_back = TRUE;
+           }
+           curwin->w_cursor = old_cursor;
+       }
+       if (do_si)
+           can_si = TRUE;
+ #endif // FEAT_SMARTINDENT
+ 
+       did_ai = TRUE;
+     }
+ 
+ #ifdef FEAT_COMMENTS
+     // Find out if the current line starts with a comment leader.
+     // This may then be inserted in front of the new line.
+     end_comment_pending = NUL;
+     if (flags & OPENLINE_DO_COM)
+       lead_len = get_leader_len(saved_line, &lead_flags,
+                                                       dir == BACKWARD, TRUE);
+     else
+       lead_len = 0;
+     if (lead_len > 0)
+     {
+       char_u  *lead_repl = NULL;          // replaces comment leader
+       int     lead_repl_len = 0;          // length of *lead_repl
+       char_u  lead_middle[COM_MAX_LEN];   // middle-comment string
+       char_u  lead_end[COM_MAX_LEN];      // end-comment string
+       char_u  *comment_end = NULL;        // where lead_end has been found
+       int     extra_space = FALSE;        // append extra space
+       int     current_flag;
+       int     require_blank = FALSE;      // requires blank after middle
+       char_u  *p2;
+ 
+       // If the comment leader has the start, middle or end flag, it may not
+       // be used or may be replaced with the middle leader.
+       for (p = lead_flags; *p && *p != ':'; ++p)
+       {
+           if (*p == COM_BLANK)
+           {
+               require_blank = TRUE;
+               continue;
+           }
+           if (*p == COM_START || *p == COM_MIDDLE)
+           {
+               current_flag = *p;
+               if (*p == COM_START)
+               {
+                   // Doing "O" on a start of comment does not insert leader.
+                   if (dir == BACKWARD)
+                   {
+                       lead_len = 0;
+                       break;
+                   }
+ 
+                   // find start of middle part
+                   (void)copy_option_part(&p, lead_middle, COM_MAX_LEN, ",");
+                   require_blank = FALSE;
+               }
+ 
+               // Isolate the strings of the middle and end leader.
+               while (*p && p[-1] != ':')      /* find end of middle flags */
+               {
+                   if (*p == COM_BLANK)
+                       require_blank = TRUE;
+                   ++p;
+               }
+               (void)copy_option_part(&p, lead_middle, COM_MAX_LEN, ",");
+ 
+               while (*p && p[-1] != ':')      // find end of end flags
+               {
+                   // Check whether we allow automatic ending of comments
+                   if (*p == COM_AUTO_END)
+                       end_comment_pending = -1; // means we want to set it
+                   ++p;
+               }
+               n = copy_option_part(&p, lead_end, COM_MAX_LEN, ",");
+ 
+               if (end_comment_pending == -1)  // we can set it now
+                   end_comment_pending = lead_end[n - 1];
+ 
+               // If the end of the comment is in the same line, don't use
+               // the comment leader.
+               if (dir == FORWARD)
+               {
+                   for (p = saved_line + lead_len; *p; ++p)
+                       if (STRNCMP(p, lead_end, n) == 0)
+                       {
+                           comment_end = p;
+                           lead_len = 0;
+                           break;
+                       }
+               }
+ 
+               // Doing "o" on a start of comment inserts the middle leader.
+               if (lead_len > 0)
+               {
+                   if (current_flag == COM_START)
+                   {
+                       lead_repl = lead_middle;
+                       lead_repl_len = (int)STRLEN(lead_middle);
+                   }
+ 
+                   // If we have hit RETURN immediately after the start
+                   // comment leader, then put a space after the middle
+                   // comment leader on the next line.
+                   if (!VIM_ISWHITE(saved_line[lead_len - 1])
+                           && ((p_extra != NULL
+                                   && (int)curwin->w_cursor.col == lead_len)
+                               || (p_extra == NULL
+                                   && saved_line[lead_len] == NUL)
+                               || require_blank))
+                       extra_space = TRUE;
+               }
+               break;
+           }
+           if (*p == COM_END)
+           {
+               // Doing "o" on the end of a comment does not insert leader.
+               // Remember where the end is, might want to use it to find the
+               // start (for C-comments).
+               if (dir == FORWARD)
+               {
+                   comment_end = skipwhite(saved_line);
+                   lead_len = 0;
+                   break;
+               }
+ 
+               // Doing "O" on the end of a comment inserts the middle leader.
+               // Find the string for the middle leader, searching backwards.
+               while (p > curbuf->b_p_com && *p != ',')
+                   --p;
+               for (lead_repl = p; lead_repl > curbuf->b_p_com
+                                        && lead_repl[-1] != ':'; --lead_repl)
+                   ;
+               lead_repl_len = (int)(p - lead_repl);
+ 
+               // We can probably always add an extra space when doing "O" on
+               // the comment-end
+               extra_space = TRUE;
+ 
+               // Check whether we allow automatic ending of comments
+               for (p2 = p; *p2 && *p2 != ':'; p2++)
+               {
+                   if (*p2 == COM_AUTO_END)
+                       end_comment_pending = -1; // means we want to set it
+               }
+               if (end_comment_pending == -1)
+               {
+                   // Find last character in end-comment string
+                   while (*p2 && *p2 != ',')
+                       p2++;
+                   end_comment_pending = p2[-1];
+               }
+               break;
+           }
+           if (*p == COM_FIRST)
+           {
+               // Comment leader for first line only:  Don't repeat leader
+               // when using "O", blank out leader when using "o".
+               if (dir == BACKWARD)
+                   lead_len = 0;
+               else
+               {
+                   lead_repl = (char_u *)"";
+                   lead_repl_len = 0;
+               }
+               break;
+           }
+       }
+       if (lead_len)
+       {
+           // allocate buffer (may concatenate p_extra later)
+           leader = alloc(lead_len + lead_repl_len + extra_space + extra_len
+                    + (second_line_indent > 0 ? second_line_indent : 0) + 1);
+           allocated = leader;             // remember to free it later
+ 
+           if (leader == NULL)
+               lead_len = 0;
+           else
+           {
+               vim_strncpy(leader, saved_line, lead_len);
+ 
+               // Replace leader with lead_repl, right or left adjusted
+               if (lead_repl != NULL)
+               {
+                   int         c = 0;
+                   int         off = 0;
+ 
+                   for (p = lead_flags; *p != NUL && *p != ':'; )
+                   {
+                       if (*p == COM_RIGHT || *p == COM_LEFT)
+                           c = *p++;
+                       else if (VIM_ISDIGIT(*p) || *p == '-')
+                           off = getdigits(&p);
+                       else
+                           ++p;
+                   }
+                   if (c == COM_RIGHT)    // right adjusted leader
+                   {
+                       // find last non-white in the leader to line up with
+                       for (p = leader + lead_len - 1; p > leader
+                                                     && VIM_ISWHITE(*p); --p)
+                           ;
+                       ++p;
+ 
+                       // Compute the length of the replaced characters in
+                       // screen characters, not bytes.
+                       {
+                           int     repl_size = vim_strnsize(lead_repl,
+                                                              lead_repl_len);
+                           int     old_size = 0;
+                           char_u  *endp = p;
+                           int     l;
+ 
+                           while (old_size < repl_size && p > leader)
+                           {
+                               MB_PTR_BACK(leader, p);
+                               old_size += ptr2cells(p);
+                           }
+                           l = lead_repl_len - (int)(endp - p);
+                           if (l != 0)
+                               mch_memmove(endp + l, endp,
+                                       (size_t)((leader + lead_len) - endp));
+                           lead_len += l;
+                       }
+                       mch_memmove(p, lead_repl, (size_t)lead_repl_len);
+                       if (p + lead_repl_len > leader + lead_len)
+                           p[lead_repl_len] = NUL;
+ 
+                       // blank-out any other chars from the old leader.
+                       while (--p >= leader)
+                       {
+                           int l = mb_head_off(leader, p);
+ 
+                           if (l > 1)
+                           {
+                               p -= l;
+                               if (ptr2cells(p) > 1)
+                               {
+                                   p[1] = ' ';
+                                   --l;
+                               }
+                               mch_memmove(p + 1, p + l + 1,
+                                  (size_t)((leader + lead_len) - (p + l + 1)));
+                               lead_len -= l;
+                               *p = ' ';
+                           }
+                           else if (!VIM_ISWHITE(*p))
+                               *p = ' ';
+                       }
+                   }
+                   else        // left adjusted leader
+                   {
+                       p = skipwhite(leader);
+ 
+                       // Compute the length of the replaced characters in
+                       // screen characters, not bytes. Move the part that is
+                       // not to be overwritten.
+                       {
+                           int     repl_size = vim_strnsize(lead_repl,
+                                                              lead_repl_len);
+                           int     i;
+                           int     l;
+ 
+                           for (i = 0; i < lead_len && p[i] != NUL; i += l)
+                           {
+                               l = (*mb_ptr2len)(p + i);
+                               if (vim_strnsize(p, i + l) > repl_size)
+                                   break;
+                           }
+                           if (i != lead_repl_len)
+                           {
+                               mch_memmove(p + lead_repl_len, p + i,
+                                      (size_t)(lead_len - i - (p - leader)));
+                               lead_len += lead_repl_len - i;
+                           }
+                       }
+                       mch_memmove(p, lead_repl, (size_t)lead_repl_len);
+ 
+                       // Replace any remaining non-white chars in the old
+                       // leader by spaces.  Keep Tabs, the indent must
+                       // remain the same.
+                       for (p += lead_repl_len; p < leader + lead_len; ++p)
+                           if (!VIM_ISWHITE(*p))
+                           {
+                               // Don't put a space before a TAB.
+                               if (p + 1 < leader + lead_len && p[1] == TAB)
+                               {
+                                   --lead_len;
+                                   mch_memmove(p, p + 1,
+                                                    (leader + lead_len) - p);
+                               }
+                               else
+                               {
+                                   int     l = (*mb_ptr2len)(p);
+ 
+                                   if (l > 1)
+                                   {
+                                       if (ptr2cells(p) > 1)
+                                       {
+                                           // Replace a double-wide char with
+                                           // two spaces
+                                           --l;
+                                           *p++ = ' ';
+                                       }
+                                       mch_memmove(p + 1, p + l,
+                                                    (leader + lead_len) - p);
+                                       lead_len -= l - 1;
+                                   }
+                                   *p = ' ';
+                               }
+                           }
+                       *p = NUL;
+                   }
+ 
+                   // Recompute the indent, it may have changed.
+                   if (curbuf->b_p_ai
+ #ifdef FEAT_SMARTINDENT
+                                       || do_si
+ #endif
+                                                          )
+ #ifdef FEAT_VARTABS
+                       newindent = get_indent_str_vtab(leader, curbuf->b_p_ts,
+                                                curbuf->b_p_vts_array, FALSE);
+ #else
+                       newindent = get_indent_str(leader,
+                                                  (int)curbuf->b_p_ts, FALSE);
+ #endif
+ 
+                   // Add the indent offset
+                   if (newindent + off < 0)
+                   {
+                       off = -newindent;
+                       newindent = 0;
+                   }
+                   else
+                       newindent += off;
+ 
+                   // Correct trailing spaces for the shift, so that
+                   // alignment remains equal.
+                   while (off > 0 && lead_len > 0
+                                              && leader[lead_len - 1] == ' ')
+                   {
+                       // Don't do it when there is a tab before the space
+                       if (vim_strchr(skipwhite(leader), '\t') != NULL)
+                           break;
+                       --lead_len;
+                       --off;
+                   }
+ 
+                   // If the leader ends in white space, don't add an
+                   // extra space
+                   if (lead_len > 0 && VIM_ISWHITE(leader[lead_len - 1]))
+                       extra_space = FALSE;
+                   leader[lead_len] = NUL;
+               }
+ 
+               if (extra_space)
+               {
+                   leader[lead_len++] = ' ';
+                   leader[lead_len] = NUL;
+               }
+ 
+               newcol = lead_len;
+ 
+               // if a new indent will be set below, remove the indent that
+               // is in the comment leader
+               if (newindent
+ #ifdef FEAT_SMARTINDENT
+                               || did_si
+ #endif
+                                          )
+               {
+                   while (lead_len && VIM_ISWHITE(*leader))
+                   {
+                       --lead_len;
+                       --newcol;
+                       ++leader;
+                   }
+               }
+ 
+           }
+ #ifdef FEAT_SMARTINDENT
+           did_si = can_si = FALSE;
+ #endif
+       }
+       else if (comment_end != NULL)
+       {
+           // We have finished a comment, so we don't use the leader.
+           // If this was a C-comment and 'ai' or 'si' is set do a normal
+           // indent to align with the line containing the start of the
+           // comment.
+           if (comment_end[0] == '*' && comment_end[1] == '/' &&
+                       (curbuf->b_p_ai
+ #ifdef FEAT_SMARTINDENT
+                                       || do_si
+ #endif
+                                                          ))
+           {
+               old_cursor = curwin->w_cursor;
+               curwin->w_cursor.col = (colnr_T)(comment_end - saved_line);
+               if ((pos = findmatch(NULL, NUL)) != NULL)
+               {
+                   curwin->w_cursor.lnum = pos->lnum;
+                   newindent = get_indent();
+               }
+               curwin->w_cursor = old_cursor;
+           }
+       }
+     }
+ #endif
+ 
+     // (State == INSERT || State == REPLACE), only when dir == FORWARD
+     if (p_extra != NULL)
+     {
+       *p_extra = saved_char;          // restore char that NUL replaced
+ 
+       // When 'ai' set or "flags" has OPENLINE_DELSPACES, skip to the first
+       // non-blank.
+       //
+       // When in REPLACE mode, put the deleted blanks on the replace stack,
+       // preceded by a NUL, so they can be put back when a BS is entered.
+       if (REPLACE_NORMAL(State))
+           replace_push(NUL);      /* end of extra blanks */
+       if (curbuf->b_p_ai || (flags & OPENLINE_DELSPACES))
+       {
+           while ((*p_extra == ' ' || *p_extra == '\t')
+                   && (!enc_utf8
+                              || !utf_iscomposing(utf_ptr2char(p_extra + 1))))
+           {
+               if (REPLACE_NORMAL(State))
+                   replace_push(*p_extra);
+               ++p_extra;
+               ++less_cols_off;
+           }
+       }
+ 
+       // columns for marks adjusted for removed columns
+       less_cols = (int)(p_extra - saved_line);
+     }
+ 
+     if (p_extra == NULL)
+       p_extra = (char_u *)"";             // append empty line
+ 
+ #ifdef FEAT_COMMENTS
+     // concatenate leader and p_extra, if there is a leader
+     if (lead_len)
+     {
+       if (flags & OPENLINE_COM_LIST && second_line_indent > 0)
+       {
+           int i;
+           int padding = second_line_indent
+                                         - (newindent + (int)STRLEN(leader));
+ 
+           // Here whitespace is inserted after the comment char.
+           // Below, set_indent(newindent, SIN_INSERT) will insert the
+           // whitespace needed before the comment char.
+           for (i = 0; i < padding; i++)
+           {
+               STRCAT(leader, " ");
+               less_cols--;
+               newcol++;
+           }
+       }
+       STRCAT(leader, p_extra);
+       p_extra = leader;
+       did_ai = TRUE;      // So truncating blanks works with comments
+       less_cols -= lead_len;
+     }
+     else
+       end_comment_pending = NUL;  // turns out there was no leader
+ #endif
+ 
+     old_cursor = curwin->w_cursor;
+     if (dir == BACKWARD)
+       --curwin->w_cursor.lnum;
+     if (!(State & VREPLACE_FLAG) || old_cursor.lnum >= orig_line_count)
+     {
+       if (ml_append(curwin->w_cursor.lnum, p_extra, (colnr_T)0, FALSE)
+                                                                     == FAIL)
+           goto theend;
+       // Postpone calling changed_lines(), because it would mess up folding
+       // with markers.
+       // Skip mark_adjust when adding a line after the last one, there can't
+       // be marks there. But still needed in diff mode.
+       if (curwin->w_cursor.lnum + 1 < curbuf->b_ml.ml_line_count
+ #ifdef FEAT_DIFF
+               || curwin->w_p_diff
+ #endif
+           )
+           mark_adjust(curwin->w_cursor.lnum + 1, (linenr_T)MAXLNUM, 1L, 0L);
+       did_append = TRUE;
+     }
+     else
+     {
+       // In VREPLACE mode we are starting to replace the next line.
+       curwin->w_cursor.lnum++;
+       if (curwin->w_cursor.lnum >= Insstart.lnum + vr_lines_changed)
+       {
+           // In case we NL to a new line, BS to the previous one, and NL
+           // again, we don't want to save the new line for undo twice.
+           (void)u_save_cursor();                  /* errors are ignored! */
+           vr_lines_changed++;
+       }
+       ml_replace(curwin->w_cursor.lnum, p_extra, TRUE);
+       changed_bytes(curwin->w_cursor.lnum, 0);
+       curwin->w_cursor.lnum--;
+       did_append = FALSE;
+     }
+ 
+     if (newindent
+ #ifdef FEAT_SMARTINDENT
+                   || did_si
+ #endif
+                               )
+     {
+       ++curwin->w_cursor.lnum;
+ #ifdef FEAT_SMARTINDENT
+       if (did_si)
+       {
+           int sw = (int)get_sw_value(curbuf);
+ 
+           if (p_sr)
+               newindent -= newindent % sw;
+           newindent += sw;
+       }
+ #endif
+       // Copy the indent
+       if (curbuf->b_p_ci)
+       {
+           (void)copy_indent(newindent, saved_line);
+ 
+           // Set the 'preserveindent' option so that any further screwing
+           // with the line doesn't entirely destroy our efforts to preserve
+           // it.  It gets restored at the function end.
+           curbuf->b_p_pi = TRUE;
+       }
+       else
+           (void)set_indent(newindent, SIN_INSERT);
+       less_cols -= curwin->w_cursor.col;
+ 
+       ai_col = curwin->w_cursor.col;
+ 
+       // In REPLACE mode, for each character in the new indent, there must
+       // be a NUL on the replace stack, for when it is deleted with BS
+       if (REPLACE_NORMAL(State))
+           for (n = 0; n < (int)curwin->w_cursor.col; ++n)
+               replace_push(NUL);
+       newcol += curwin->w_cursor.col;
+ #ifdef FEAT_SMARTINDENT
+       if (no_si)
+           did_si = FALSE;
+ #endif
+     }
+ 
+ #ifdef FEAT_COMMENTS
+     // In REPLACE mode, for each character in the extra leader, there must be
+     // a NUL on the replace stack, for when it is deleted with BS.
+     if (REPLACE_NORMAL(State))
+       while (lead_len-- > 0)
+           replace_push(NUL);
+ #endif
+ 
+     curwin->w_cursor = old_cursor;
+ 
+     if (dir == FORWARD)
+     {
+       if (trunc_line || (State & INSERT))
+       {
+           // truncate current line at cursor
+           saved_line[curwin->w_cursor.col] = NUL;
+           // Remove trailing white space, unless OPENLINE_KEEPTRAIL used.
+           if (trunc_line && !(flags & OPENLINE_KEEPTRAIL))
+               truncate_spaces(saved_line);
+           ml_replace(curwin->w_cursor.lnum, saved_line, FALSE);
+           saved_line = NULL;
+           if (did_append)
+           {
+               changed_lines(curwin->w_cursor.lnum, curwin->w_cursor.col,
+                                              curwin->w_cursor.lnum + 1, 1L);
+               did_append = FALSE;
+ 
+               // Move marks after the line break to the new line.
+               if (flags & OPENLINE_MARKFIX)
+                   mark_col_adjust(curwin->w_cursor.lnum,
+                                        curwin->w_cursor.col + less_cols_off,
+                                                     1L, (long)-less_cols, 0);
+           }
+           else
+               changed_bytes(curwin->w_cursor.lnum, curwin->w_cursor.col);
+       }
+ 
+       // Put the cursor on the new line.  Careful: the scrollup() above may
+       // have moved w_cursor, we must use old_cursor.
+       curwin->w_cursor.lnum = old_cursor.lnum + 1;
+     }
+     if (did_append)
+       changed_lines(curwin->w_cursor.lnum, 0, curwin->w_cursor.lnum, 1L);
+ 
+     curwin->w_cursor.col = newcol;
+     curwin->w_cursor.coladd = 0;
+ 
+ #if defined(FEAT_LISP) || defined(FEAT_CINDENT)
+     // In VREPLACE mode, we are handling the replace stack ourselves, so stop
+     // fixthisline() from doing it (via change_indent()) by telling it we're 
in
+     // normal INSERT mode.
+     if (State & VREPLACE_FLAG)
+     {
+       vreplace_mode = State;  // So we know to put things right later
+       State = INSERT;
+     }
+     else
+       vreplace_mode = 0;
+ #endif
+ #ifdef FEAT_LISP
+     // May do lisp indenting.
+     if (!p_paste
+ # ifdef FEAT_COMMENTS
+           && leader == NULL
+ # endif
+           && curbuf->b_p_lisp
+           && curbuf->b_p_ai)
+     {
+       fixthisline(get_lisp_indent);
+       ai_col = (colnr_T)getwhitecols_curline();
+     }
+ #endif
+ #ifdef FEAT_CINDENT
+     // May do indenting after opening a new line.
+     if (!p_paste
+           && (curbuf->b_p_cin
+ #  ifdef FEAT_EVAL
+                   || *curbuf->b_p_inde != NUL
+ #  endif
+               )
+           && in_cinkeys(dir == FORWARD
+               ? KEY_OPEN_FORW
+               : KEY_OPEN_BACK, ' ', linewhite(curwin->w_cursor.lnum)))
+     {
+       do_c_expr_indent();
+       ai_col = (colnr_T)getwhitecols_curline();
+     }
+ #endif
+ #if defined(FEAT_LISP) || defined(FEAT_CINDENT)
+     if (vreplace_mode != 0)
+       State = vreplace_mode;
+ #endif
+ 
+     // Finally, VREPLACE gets the stuff on the new line, then puts back the
+     // original line, and inserts the new stuff char by char, pushing old 
stuff
+     // onto the replace stack (via ins_char()).
+     if (State & VREPLACE_FLAG)
+     {
+       // Put new line in p_extra
+       p_extra = vim_strsave(ml_get_curline());
+       if (p_extra == NULL)
+           goto theend;
+ 
+       // Put back original line
+       ml_replace(curwin->w_cursor.lnum, next_line, FALSE);
+ 
+       // Insert new stuff into line again
+       curwin->w_cursor.col = 0;
+       curwin->w_cursor.coladd = 0;
+       ins_bytes(p_extra);     // will call changed_bytes()
+       vim_free(p_extra);
+       next_line = NULL;
+     }
+ 
+     retval = OK;              // success!
+ theend:
+     curbuf->b_p_pi = saved_pi;
+     vim_free(saved_line);
+     vim_free(next_line);
+     vim_free(allocated);
+     return retval;
+ }
+ 
+ /*
+  * Delete from cursor to end of line.
+  * Caller must have prepared for undo.
+  * If "fixpos" is TRUE fix the cursor position when done.
+  *
+  * Return FAIL for failure, OK otherwise.
+  */
+     int
+ truncate_line(int fixpos)
+ {
+     char_u    *newp;
+     linenr_T  lnum = curwin->w_cursor.lnum;
+     colnr_T   col = curwin->w_cursor.col;
+ 
+     if (col == 0)
+       newp = vim_strsave((char_u *)"");
+     else
+       newp = vim_strnsave(ml_get(lnum), col);
+ 
+     if (newp == NULL)
+       return FAIL;
+ 
+     ml_replace(lnum, newp, FALSE);
+ 
+     // mark the buffer as changed and prepare for displaying
+     changed_bytes(lnum, curwin->w_cursor.col);
+ 
+     // If "fixpos" is TRUE we don't want to end up positioned at the NUL.
+     if (fixpos && curwin->w_cursor.col > 0)
+       --curwin->w_cursor.col;
+ 
+     return OK;
+ }
+ 
+ /*
+  * Delete "nlines" lines at the cursor.
+  * Saves the lines for undo first if "undo" is TRUE.
+  */
+     void
+ del_lines(long nlines,        int undo)
+ {
+     long      n;
+     linenr_T  first = curwin->w_cursor.lnum;
+ 
+     if (nlines <= 0)
+       return;
+ 
+     // save the deleted lines for undo
+     if (undo && u_savedel(first, nlines) == FAIL)
+       return;
+ 
+     for (n = 0; n < nlines; )
+     {
+       if (curbuf->b_ml.ml_flags & ML_EMPTY)       // nothing to delete
+           break;
+ 
+       ml_delete(first, TRUE);
+       ++n;
+ 
+       // If we delete the last line in the file, stop
+       if (first > curbuf->b_ml.ml_line_count)
+           break;
+     }
+ 
+     // Correct the cursor position before calling deleted_lines_mark(), it may
+     // trigger a callback to display the cursor.
+     curwin->w_cursor.col = 0;
+     check_cursor_lnum();
+ 
+     // adjust marks, mark the buffer as changed and prepare for displaying
+     deleted_lines_mark(first, n);
+ }
*** ../vim-8.1.1317/src/proto/change.pro        2019-05-11 17:02:59.038341052 
+0200
--- src/proto/change.pro        2019-05-11 16:56:18.508683414 +0200
***************
*** 0 ****
--- 1,24 ----
+ /* change.c */
+ void change_warning(int col);
+ void changed(void);
+ void changed_internal(void);
+ void changed_bytes(linenr_T lnum, colnr_T col);
+ void inserted_bytes(linenr_T lnum, colnr_T col, int added);
+ void appended_lines(linenr_T lnum, long count);
+ void appended_lines_mark(linenr_T lnum, long count);
+ void deleted_lines(linenr_T lnum, long count);
+ void deleted_lines_mark(linenr_T lnum, long count);
+ void changed_lines(linenr_T lnum, colnr_T col, linenr_T lnume, long xtra);
+ void unchanged(buf_T *buf, int ff);
+ void ins_bytes(char_u *p);
+ void ins_bytes_len(char_u *p, int len);
+ void ins_char(int c);
+ void ins_char_bytes(char_u *buf, int charlen);
+ void ins_str(char_u *s);
+ int del_char(int fixpos);
+ int del_chars(long count, int fixpos);
+ int del_bytes(long count, int fixpos_arg, int use_delcombine);
+ int open_line(int dir, int flags, int second_line_indent);
+ int truncate_line(int fixpos);
+ void del_lines(long nlines, int undo);
+ /* vim: set ft=c : */
*** ../vim-8.1.1317/src/proto.h 2019-05-09 15:12:45.176723907 +0200
--- src/proto.h 2019-05-11 16:18:07.765350280 +0200
***************
*** 63,68 ****
--- 63,69 ----
  # endif
  # include "autocmd.pro"
  # include "buffer.pro"
+ # include "change.pro"
  # include "charset.pro"
  # ifdef FEAT_CSCOPE
  #  include "if_cscope.pro"
*** ../vim-8.1.1317/src/memline.c       2019-05-10 21:28:35.184612974 +0200
--- src/memline.c       2019-05-11 16:33:00.205143420 +0200
***************
*** 1637,1643 ****
         * empty.  Don't set the modified flag then. */
        if (!(curbuf->b_ml.ml_line_count == 2 && *ml_get(1) == NUL))
        {
!           changed_int();
            ++CHANGEDTICK(curbuf);
        }
      }
--- 1637,1643 ----
         * empty.  Don't set the modified flag then. */
        if (!(curbuf->b_ml.ml_line_count == 2 && *ml_get(1) == NUL))
        {
!           changed_internal();
            ++CHANGEDTICK(curbuf);
        }
      }
***************
*** 1651,1657 ****
            vim_free(p);
            if (i != 0)
            {
!               changed_int();
                ++CHANGEDTICK(curbuf);
                break;
            }
--- 1651,1657 ----
            vim_free(p);
            if (i != 0)
            {
!               changed_internal();
                ++CHANGEDTICK(curbuf);
                break;
            }
*** ../vim-8.1.1317/Filelist    2019-05-09 15:12:45.164723999 +0200
--- Filelist    2019-05-11 16:20:22.108775557 +0200
***************
*** 20,25 ****
--- 20,26 ----
                src/blob.c \
                src/blowfish.c \
                src/buffer.c \
+               src/change.c \
                src/channel.c \
                src/charset.c \
                src/crypt.c \
***************
*** 155,160 ****
--- 156,162 ----
                src/proto/blob.pro \
                src/proto/blowfish.pro \
                src/proto/buffer.pro \
+               src/proto/change.pro \
                src/proto/channel.pro \
                src/proto/charset.pro \
                src/proto/crypt.pro \
*** ../vim-8.1.1317/src/Make_cyg_ming.mak       2019-04-28 19:46:17.018060159 
+0200
--- src/Make_cyg_ming.mak       2019-05-11 16:20:54.548632100 +0200
***************
*** 705,710 ****
--- 705,711 ----
        $(OUTDIR)/blob.o \
        $(OUTDIR)/blowfish.o \
        $(OUTDIR)/buffer.o \
+       $(OUTDIR)/change.o \
        $(OUTDIR)/charset.o \
        $(OUTDIR)/crypt.o \
        $(OUTDIR)/crypt_zip.o \
*** ../vim-8.1.1317/src/Make_dice.mak   2019-04-27 13:03:20.000715982 +0200
--- src/Make_dice.mak   2019-05-11 16:21:17.396530064 +0200
***************
*** 30,35 ****
--- 30,36 ----
        autocmd.c \
        blowfish.c \
        buffer.c \
+       change.c \
        charset.c \
        crypt.c \
        crypt_zip.c \
***************
*** 92,97 ****
--- 93,99 ----
        o/autocmd.o \
        o/blowfish.o \
        o/buffer.o \
+       o/change.o \
        o/charset.o \
        o/crypt.o \
        o/crypt_zip.o \
***************
*** 177,182 ****
--- 179,186 ----
  
  o/buffer.o:   buffer.c  $(SYMS)
  
+ o/change.o:   change.c  $(SYMS)
+ 
  o/charset.o:  charset.c  $(SYMS)
  
  o/crypt.o:    crypt.c  $(SYMS)
*** ../vim-8.1.1317/src/Make_manx.mak   2019-04-27 13:03:20.000715982 +0200
--- src/Make_manx.mak   2019-05-11 16:21:56.032355815 +0200
***************
*** 40,45 ****
--- 40,46 ----
        autocmd.c \
        blowfish.c \
        buffer.c \
+       change.c \
        charset.c \
        crypt.c \
        crypt_zip.c \
***************
*** 104,109 ****
--- 105,111 ----
        obj/autocmd.o \
        obj/blowfish.o \
        obj/buffer.o \
+       obj/change.o \
        obj/charset.o \
        obj/crypt.o \
        obj/crypt_zip.o \
***************
*** 166,171 ****
--- 168,174 ----
        proto/autocmd.pro \
        proto/blowfish.pro \
        proto/buffer.pro \
+       proto/change.pro \
        proto/charset.pro \
        proto/crypt.pro \
        proto/crypt_zip.pro \
***************
*** 280,285 ****
--- 283,291 ----
  obj/buffer.o: buffer.c
        $(CCSYM) $@ buffer.c
  
+ obj/change.o: change.c
+       $(CCSYM) $@ change.c
+ 
  obj/charset.o:        charset.c
        $(CCSYM) $@ charset.c
  
*** ../vim-8.1.1317/src/Make_morph.mak  2019-04-27 13:03:20.000715982 +0200
--- src/Make_morph.mak  2019-05-11 16:22:06.672307471 +0200
***************
*** 28,33 ****
--- 28,34 ----
        autocmd.c                                               \
        blowfish.c                                              \
        buffer.c                                                \
+       change.c                                                \
        charset.c                                               \
        crypt.c                                                 \
        crypt_zip.c                                             \
*** ../vim-8.1.1317/src/Make_mvc.mak    2019-05-10 21:38:50.037438773 +0200
--- src/Make_mvc.mak    2019-05-11 16:22:27.648211682 +0200
***************
*** 700,705 ****
--- 700,706 ----
        $(OUTDIR)\blob.obj \
        $(OUTDIR)\blowfish.obj \
        $(OUTDIR)\buffer.obj \
+       $(OUTDIR)\change.obj \
        $(OUTDIR)\charset.obj \
        $(OUTDIR)\crypt.obj \
        $(OUTDIR)\crypt_zip.obj \
***************
*** 1410,1415 ****
--- 1411,1418 ----
  
  $(OUTDIR)/buffer.obj: $(OUTDIR) buffer.c  $(INCL)
  
+ $(OUTDIR)/change.obj: $(OUTDIR) change.c  $(INCL)
+ 
  $(OUTDIR)/charset.obj:        $(OUTDIR) charset.c  $(INCL)
  
  $(OUTDIR)/crypt.obj:  $(OUTDIR) crypt.c  $(INCL)
***************
*** 1700,1705 ****
--- 1703,1709 ----
        proto/blob.pro \
        proto/blowfish.pro \
        proto/buffer.pro \
+       proto/change.pro \
        proto/charset.pro \
        proto/crypt.pro \
        proto/crypt_zip.pro \
*** ../vim-8.1.1317/src/Make_sas.mak    2019-04-27 13:03:20.000715982 +0200
--- src/Make_sas.mak    2019-05-11 16:22:52.732096436 +0200
***************
*** 93,98 ****
--- 93,99 ----
        autocmd.c \
        blowfish.c \
        buffer.c \
+       change.c \
        charset.c \
        crypt.c \
        crypt_zip.c \
***************
*** 156,161 ****
--- 157,163 ----
        autocmd.o \
        blowfish.o \
        buffer.o \
+       change.o \
        charset.o \
        crypt.o \
        crypt_zip.o \
***************
*** 219,224 ****
--- 221,227 ----
        proto/autocmd.pro \
        proto/blowfish.pro \
        proto/buffer.pro \
+       proto/change.pro \
        proto/charset.pro \
        proto/crypt.pro \
        proto/crypt_zip.pro \
***************
*** 340,345 ****
--- 343,350 ----
  proto/blowfish.pro:   blowfish.c
  buffer.o:             buffer.c
  proto/buffer.pro:     buffer.c
+ change.o:             change.c
+ proto/change.pro:     change.c
  charset.o:            charset.c
  proto/charset.pro:    charset.c
  crypt.o:              crypt.c
*** ../vim-8.1.1317/src/Make_vms.mms    2019-04-27 13:03:20.000715982 +0200
--- src/Make_vms.mms    2019-05-11 16:23:19.943970612 +0200
***************
*** 2,8 ****
  # Makefile for Vim on OpenVMS
  #
  # Maintainer:   Zoltan Arpadffy <[email protected]>
! # Last change:  2019 Apr 26
  #
  # This has script been tested on VMS 6.2 to 8.2 on DEC Alpha, VAX and IA64
  # with MMS and MMK
--- 2,8 ----
  # Makefile for Vim on OpenVMS
  #
  # Maintainer:   Zoltan Arpadffy <[email protected]>
! # Last change:  2019 May 11
  #
  # This has script been tested on VMS 6.2 to 8.2 on DEC Alpha, VAX and IA64
  # with MMS and MMK
***************
*** 307,313 ****
  ALL_LIBS = $(LIBS) $(GUI_LIB_DIR) $(GUI_LIB) \
           $(PERL_LIB) $(PYTHON_LIB) $(TCL_LIB) $(RUBY_LIB)
  
! SRC = arabic.c autocmd.c beval.c blob.c blowfish.c buffer.c charset.c \
        crypt.c crypt_zip.c debugger.c dict.c diff.c digraph.c edit.c eval.c \
        evalfunc.c ex_cmds.c ex_cmds2.c ex_docmd.c ex_eval.c ex_getln.c \
        if_cscope.c if_xcmdsrv.c fileio.c findfile.c fold.c getchar.c \
--- 307,313 ----
  ALL_LIBS = $(LIBS) $(GUI_LIB_DIR) $(GUI_LIB) \
           $(PERL_LIB) $(PYTHON_LIB) $(TCL_LIB) $(RUBY_LIB)
  
! SRC = arabic.c autocmd.c beval.c blob.c blowfish.c buffer.c change.c, 
charset.c \
        crypt.c crypt_zip.c debugger.c dict.c diff.c digraph.c edit.c eval.c \
        evalfunc.c ex_cmds.c ex_cmds2.c ex_docmd.c ex_eval.c ex_getln.c \
        if_cscope.c if_xcmdsrv.c fileio.c findfile.c fold.c getchar.c \
***************
*** 320,326 ****
        $(GUI_SRC) $(PERL_SRC) $(PYTHON_SRC) $(TCL_SRC) \
        $(RUBY_SRC) $(HANGULIN_SRC) $(MZSCH_SRC) $(XDIFF_SRC)
  
! OBJ =         arabic.obj autocmd.obj beval.obj blob.obj blowfish.obj 
buffer.obj \
        charset.obj crypt.obj crypt_zip.obj debugger.obj dict.obj diff.obj \
        digraph.obj edit.obj eval.obj evalfunc.obj ex_cmds.obj ex_cmds2.obj \
        ex_docmd.obj ex_eval.obj ex_getln.obj if_cscope.obj if_xcmdsrv.obj \
--- 320,326 ----
        $(GUI_SRC) $(PERL_SRC) $(PYTHON_SRC) $(TCL_SRC) \
        $(RUBY_SRC) $(HANGULIN_SRC) $(MZSCH_SRC) $(XDIFF_SRC)
  
! OBJ =         arabic.obj autocmd.obj beval.obj blob.obj blowfish.obj 
buffer.obj change.obj \
        charset.obj crypt.obj crypt_zip.obj debugger.obj dict.obj diff.obj \
        digraph.obj edit.obj eval.obj evalfunc.obj ex_cmds.obj ex_cmds2.obj \
        ex_docmd.obj ex_eval.obj ex_getln.obj if_cscope.obj if_xcmdsrv.obj \
***************
*** 510,515 ****
--- 510,519 ----
   ascii.h keymap.h term.h macros.h structs.h regexp.h \
   gui.h beval.h [.proto]gui_beval.pro option.h ex_cmds.h proto.h \
   globals.h version.h
+ change.obj : change.c vim.h [.auto]config.h feature.h os_unix.h \
+  ascii.h keymap.h term.h macros.h structs.h regexp.h \
+  gui.h beval.h [.proto]gui_beval.pro option.h ex_cmds.h proto.h \
+  globals.h version.h
  charset.obj : charset.c vim.h [.auto]config.h feature.h os_unix.h \
   ascii.h keymap.h term.h macros.h structs.h regexp.h \
   gui.h beval.h [.proto]gui_beval.pro option.h ex_cmds.h proto.h \
*** ../vim-8.1.1317/src/Makefile        2019-05-06 21:59:42.194211119 +0200
--- src/Makefile        2019-05-11 16:23:53.759813145 +0200
***************
*** 1576,1581 ****
--- 1577,1583 ----
        blob.c \
        blowfish.c \
        buffer.c \
+       change.c \
        charset.c \
        crypt.c \
        crypt_zip.c \
***************
*** 1691,1696 ****
--- 1693,1699 ----
        objects/autocmd.o \
        objects/beval.o \
        objects/buffer.o \
+       objects/change.o \
        objects/blob.o \
        objects/blowfish.o \
        objects/crypt.o \
***************
*** 1821,1826 ****
--- 1824,1830 ----
        autocmd.pro \
        blowfish.pro \
        buffer.pro \
+       change.pro \
        charset.pro \
        crypt.pro \
        crypt_zip.pro \
***************
*** 2965,2970 ****
--- 2969,2977 ----
  objects/buffer.o: buffer.c
        $(CCC) -o $@ buffer.c
  
+ objects/change.o: change.c
+       $(CCC) -o $@ change.c
+ 
  objects/charset.o: charset.c
        $(CCC) -o $@ charset.c
  
***************
*** 3430,3435 ****
--- 3437,3446 ----
   auto/osdef.h ascii.h keymap.h term.h macros.h option.h beval.h \
   proto/gui_beval.pro structs.h regexp.h gui.h alloc.h ex_cmds.h spell.h \
   proto.h globals.h version.h
+ objects/change.o: change.c vim.h protodef.h auto/config.h feature.h os_unix.h 
\
+  auto/osdef.h ascii.h keymap.h term.h macros.h option.h beval.h \
+  proto/gui_beval.pro structs.h regexp.h gui.h alloc.h ex_cmds.h spell.h \
+  proto.h globals.h version.h
  objects/charset.o: charset.c vim.h protodef.h auto/config.h feature.h 
os_unix.h \
   auto/osdef.h ascii.h keymap.h term.h macros.h option.h beval.h \
   proto/gui_beval.pro structs.h regexp.h gui.h alloc.h ex_cmds.h spell.h \
*** ../vim-8.1.1317/src/README.md       2019-04-27 13:03:20.000715982 +0200
--- src/README.md       2019-05-11 16:19:40.208958309 +0200
***************
*** 25,30 ****
--- 25,31 ----
  --------- | -----------
  autocmd.c     | autocommands
  buffer.c      | manipulating buffers (loaded files)
+ change.c      | handling changes to text
  debugger.c    | vim script debugger
  diff.c                | diff mode (vimdiff)
  eval.c                | expression evaluation
*** ../vim-8.1.1317/src/version.c       2019-05-11 14:34:09.326200119 +0200
--- src/version.c       2019-05-11 16:58:51.491776191 +0200
***************
*** 769,770 ****
--- 769,772 ----
  {   /* Add new patch number below this line */
+ /**/
+     1318,
  /**/

-- 
Mynd you, m00se bites Kan be pretty nasti ...
                 "Monty Python and the Holy Grail" PYTHON (MONTY) PICTURES LTD

 /// Bram Moolenaar -- [email protected] -- http://www.Moolenaar.net   \\\
///        sponsor Vim, vote for features -- http://www.Vim.org/sponsor/ \\\
\\\  an exciting new programming language -- http://www.Zimbu.org        ///
 \\\            help me help AIDS victims -- http://ICCF-Holland.org    ///

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