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Subject: Patch 7.2.280

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From: Bram Moolenaar <[email protected]>

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------------

Patch 7.2.280

Problem:    A redraw in a custom statusline with %! may cause a crash.

            (Yukihiro Nakadaira)

Solution:   Make a copy of 'statusline'.  Also fix typo in function name

            redraw_custum_statusline. (party by Dominique Pelle)

Files:      src/screen.c

*** ../vim-7.2.279/src/screen.c	2009-07-29 16:13:35.000000000 +0200

--- src/screen.c	2009-11-03 17:13:16.000000000 +0100

***************

*** 132,138 ****

  static void draw_vsep_win __ARGS((win_T *wp, int row));

  #endif

  #ifdef FEAT_STL_OPT

! static void redraw_custum_statusline __ARGS((win_T *wp));

  #endif

  #ifdef FEAT_SEARCH_EXTRA

  #define SEARCH_HL_PRIORITY 0

--- 132,138 ----

  static void draw_vsep_win __ARGS((win_T *wp, int row));

  #endif

  #ifdef FEAT_STL_OPT

! static void redraw_custom_statusline __ARGS((win_T *wp));

  #endif

  #ifdef FEAT_SEARCH_EXTRA

  #define SEARCH_HL_PRIORITY 0

***************

*** 5772,5778 ****

      else if (*p_stl != NUL || *wp->w_p_stl != NUL)

      {

  	/* redraw custom status line */

! 	redraw_custum_statusline(wp);

      }

  #endif

      else

--- 5794,5800 ----

      else if (*p_stl != NUL || *wp->w_p_stl != NUL)

      {

  	/* redraw custom status line */

! 	redraw_custom_statusline(wp);

      }

  #endif

      else

***************

*** 5897,5914 ****

   * errors encountered.

   */

      static void

! redraw_custum_statusline(wp)

      win_T	    *wp;

  {

!     int	save_called_emsg = called_emsg;

      called_emsg = FALSE;

      win_redr_custom(wp, FALSE);

      if (called_emsg)

  	set_string_option_direct((char_u *)"statusline", -1,

  		(char_u *)"", OPT_FREE | (*wp->w_p_stl != NUL

  					? OPT_LOCAL : OPT_GLOBAL), SID_ERROR);

      called_emsg |= save_called_emsg;

  }

  #endif

--- 5919,5949 ----

   * errors encountered.

   */

      static void

! redraw_custom_statusline(wp)

      win_T	    *wp;

  {

!     static int	    entered = FALSE;

!     int		    save_called_emsg = called_emsg;

! 

!     /* When called recursively return.  This can happen when the statusline

!      * contains an expression that triggers a redraw. */

!     if (entered)

! 	return;

!     entered = TRUE;

      called_emsg = FALSE;

      win_redr_custom(wp, FALSE);

      if (called_emsg)

+     {

+ 	/* When there is an error disable the statusline, otherwise the

+ 	 * display is messed up with errors and a redraw triggers the problem

+ 	 * again and again. */

  	set_string_option_direct((char_u *)"statusline", -1,

  		(char_u *)"", OPT_FREE | (*wp->w_p_stl != NUL

  					? OPT_LOCAL : OPT_GLOBAL), SID_ERROR);

+     }

      called_emsg |= save_called_emsg;

+     entered = FALSE;

  }

  #endif

***************

*** 6016,6021 ****

--- 6051,6057 ----

      int		len;

      int		fillchar;

      char_u	buf[MAXPATHL];

+     char_u	*stl;

      char_u	*p;

      struct	stl_hlrec hltab[STL_MAX_ITEM];

      struct	stl_hlrec tabtab[STL_MAX_ITEM];

***************

*** 6025,6031 ****

      if (wp == NULL)

      {

  	/* Use 'tabline'.  Always at the first line of the screen. */

! 	p = p_tal;

  	row = 0;

  	fillchar = ' ';

  	attr = hl_attr(HLF_TPF);

--- 6061,6067 ----

      if (wp == NULL)

      {

  	/* Use 'tabline'.  Always at the first line of the screen. */

! 	stl = p_tal;

  	row = 0;

  	fillchar = ' ';

  	attr = hl_attr(HLF_TPF);

***************

*** 6042,6058 ****

  	if (draw_ruler)

  	{

! 	    p = p_ruf;

  	    /* advance past any leading group spec - implicit in ru_col */

! 	    if (*p == '%')

  	    {

! 		if (*++p == '-')

! 		    p++;

! 		if (atoi((char *) p))

! 		    while (VIM_ISDIGIT(*p))

! 			p++;

! 		if (*p++ != '(')

! 		    p = p_ruf;

  	    }

  #ifdef FEAT_VERTSPLIT

  	    col = ru_col - (Columns - W_WIDTH(wp));

--- 6078,6094 ----

  	if (draw_ruler)

  	{

! 	    stl = p_ruf;

  	    /* advance past any leading group spec - implicit in ru_col */

! 	    if (*stl == '%')

  	    {

! 		if (*++stl == '-')

! 		    stl++;

! 		if (atoi((char *)stl))

! 		    while (VIM_ISDIGIT(*stl))

! 			stl++;

! 		if (*stl++ != '(')

! 		    stl = p_ruf;

  	    }

  #ifdef FEAT_VERTSPLIT

  	    col = ru_col - (Columns - W_WIDTH(wp));

***************

*** 6081,6089 ****

  	else

  	{

  	    if (*wp->w_p_stl != NUL)

! 		p = wp->w_p_stl;

  	    else

! 		p = p_stl;

  # ifdef FEAT_EVAL

  	    use_sandbox = was_set_insecurely((char_u *)"statusline",

  					 *wp->w_p_stl == NUL ? 0 : OPT_LOCAL);

--- 6117,6125 ----

  	else

  	{

  	    if (*wp->w_p_stl != NUL)

! 		stl = wp->w_p_stl;

  	    else

! 		stl = p_stl;

  # ifdef FEAT_EVAL

  	    use_sandbox = was_set_insecurely((char_u *)"statusline",

  					 *wp->w_p_stl == NUL ? 0 : OPT_LOCAL);

***************

*** 6098,6107 ****

      if (maxwidth <= 0)

  	return;

      width = build_stl_str_hl(wp == NULL ? curwin : wp,

  				buf, sizeof(buf),

! 				p, use_sandbox,

  				fillchar, maxwidth, hltab, tabtab);

      len = (int)STRLEN(buf);

      while (width < maxwidth && len < (int)sizeof(buf) - 1)

--- 6134,6147 ----

      if (maxwidth <= 0)

  	return;

+     /* Make a copy, because the statusline may include a function call that

+      * might change the option value and free the memory. */

+     stl = vim_strsave(stl);

      width = build_stl_str_hl(wp == NULL ? curwin : wp,

  				buf, sizeof(buf),

! 				stl, use_sandbox,

  				fillchar, maxwidth, hltab, tabtab);

+     vim_free(stl);

      len = (int)STRLEN(buf);

      while (width < maxwidth && len < (int)sizeof(buf) - 1)

***************

*** 9465,9471 ****

  #if defined(FEAT_STL_OPT) && defined(FEAT_WINDOWS)

      if ((*p_stl != NUL || *curwin->w_p_stl != NUL) && curwin->w_status_height)

      {

! 	redraw_custum_statusline(curwin);

      }

      else

  #endif

--- 9505,9511 ----

  #if defined(FEAT_STL_OPT) && defined(FEAT_WINDOWS)

      if ((*p_stl != NUL || *curwin->w_p_stl != NUL) && curwin->w_status_height)

      {

! 	redraw_custom_statusline(curwin);

      }

      else

  #endif

*** ../vim-7.2.279/src/version.c	2009-11-03 16:44:04.000000000 +0100

--- src/version.c	2009-11-03 17:15:35.000000000 +0100

***************

*** 678,679 ****

--- 678,681 ----

  {   /* Add new patch number below this line */

+ /**/

+     280,

  /**/

-- 

Every exit is an entrance into something else.

 /// Bram Moolenaar -- [email protected] -- http://www.Moolenaar.net   \\\

///        sponsor Vim, vote for features -- http://www.Vim.org/sponsor/ \\\

\\\        download, build and distribute -- http://www.A-A-P.org        ///

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