Patch 7.1.202

[Bram Moolenaar]

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 -- Br...@Moolenaar.net -- http://www.Moolenaar.net \\\
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