andros/emacs-gpu
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

* insdel.c (count_size_as_multibyte): Check for string overflow.

Browse source
This commit is contained in:
Paul Eggert 2011-05-15 22:15:51 -07:00
parent 2b4560a850
commit 06d6db334e
2 changed files with 12 additions and 2 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

2
src/ChangeLog
View file

@ -1,5 +1,7 @@
2011-05-16 Paul Eggert <eggert@cs.ucla.edu>
* insdel.c (count_size_as_multibyte): Check for string overflow.
* character.c (lisp_string_width): Check for string overflow.
Use EMACS_INT, not int, for string indexes and lengths; in
particular, 2nd arg is now EMACS_INT, not int. Do not crash if

12
src/insdel.c
View file

@ -20,6 +20,9 @@ along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */
#include <config.h>
#include <setjmp.h>
#include <intprops.h>
#include "lisp.h"
#include "intervals.h"
#include "buffer.h"
@ -581,14 +584,19 @@ count_size_as_multibyte (const unsigned char *ptr, EMACS_INT nbytes)
for (i = 0; i < nbytes; i++)
{
unsigned int c = *ptr++;
int n;
if (ASCII_CHAR_P (c))
outgoing_nbytes++;
n = 1;
else
{
c = BYTE8_TO_CHAR (c);
outgoing_nbytes += CHAR_BYTES (c);
n = CHAR_BYTES (c);
}
if (INT_ADD_OVERFLOW (outgoing_nbytes, n))
string_overflow ();
outgoing_nbytes += n;
}
return outgoing_nbytes;