Commit 06d6db33 authored by Paul Eggert's avatar Paul Eggert
Browse files

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

parent 2b4560a8
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
......
......@@ -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;
......
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