To: vim-dev@vim.org
Subject: Patch 7.1.202
Fcc: outbox
From: Bram Moolenaar <Bram@moolenaar.net>
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------------

Patch 7.1.202
Problem:    Incomplete utf-8 byte sequence is not checked for validity.
Solution:   Check the bytes that are present for being valid. (Ben Schmidt)
Files:	    src/mbyte.c


*** ../vim-7.1.201/src/mbyte.c	Thu Aug 30 13:51:52 2007
--- src/mbyte.c	Fri Jan  4 17:30:16 2008
***************
*** 1642,1648 ****
   * Get the length of UTF-8 byte sequence "p[size]".  Does not include any
   * following composing characters.
   * Returns 1 for "".
!  * Returns 1 for an illegal byte sequence.
   * Returns number > "size" for an incomplete byte sequence.
   */
      int
--- 1642,1648 ----
   * Get the length of UTF-8 byte sequence "p[size]".  Does not include any
   * following composing characters.
   * Returns 1 for "".
!  * Returns 1 for an illegal byte sequence (also in incomplete byte seq.).
   * Returns number > "size" for an incomplete byte sequence.
   */
      int
***************
*** 1652,1664 ****
  {
      int		len;
      int		i;
  
      if (*p == NUL)
  	return 1;
!     len = utf8len_tab[*p];
      if (len > size)
! 	return len;	/* incomplete byte sequence. */
!     for (i = 1; i < len; ++i)
  	if ((p[i] & 0xc0) != 0x80)
  	    return 1;
      return len;
--- 1652,1665 ----
  {
      int		len;
      int		i;
+     int		m;
  
      if (*p == NUL)
  	return 1;
!     m = len = utf8len_tab[*p];
      if (len > size)
! 	m = size;	/* incomplete byte sequence. */
!     for (i = 1; i < m; ++i)
  	if ((p[i] & 0xc0) != 0x80)
  	    return 1;
      return len;
*** ../vim-7.1.201/src/version.c	Fri Jan  4 16:30:40 2008
--- src/version.c	Fri Jan  4 17:45:33 2008
***************
*** 668,669 ****
--- 668,671 ----
  {   /* Add new patch number below this line */
+ /**/
+     202,
  /**/

-- 
A computer programmer is a device for turning requirements into
undocumented features.  It runs on cola, pizza and Dilbert cartoons.
					Bram Moolenaar

 /// Bram Moolenaar -- Bram@Moolenaar.net -- http://www.Moolenaar.net   \\\
///        sponsor Vim, vote for features -- http://www.Vim.org/sponsor/ \\\
\\\        download, build and distribute -- http://www.A-A-P.org        ///
 \\\            help me help AIDS victims -- http://ICCF-Holland.org    ///