Check for buffer and string overflow more precisely.

* buffer.h (BUF_BYTES_MAX): New macro.
* lisp.h (STRING_BYTES_MAX): New macro.
* alloc.c (Fmake_string):
* character.c (string_escape_byte8):
* coding.c (coding_alloc_by_realloc):
* doprnt.c (doprnt):
* editfns.c (Fformat):
* eval.c (verror):
Use STRING_BYTES_MAX, not MOST_POSITIVE_FIXNUM,
since they may not be the same number.
* editfns.c (Finsert_char):
* fileio.c (Finsert_file_contents):
Likewise for BUF_BYTES_MAX.

1 files changed, 15 insertions, 0 deletions

diff --git a/src/ChangeLog b/src/ChangeLog
index 8333bf2dedd..374790b51f6 100644
--- a/src/ChangeLog
+++ b/src/ChangeLog
@@ -1,5 +1,20 @@
 2011-06-04  Paul Eggert  <eggert@cs.ucla.edu>
 
+        Check for buffer and string overflow more precisely.
+        * buffer.h (BUF_BYTES_MAX): New macro.
+        * lisp.h (STRING_BYTES_MAX): New macro.
+        * alloc.c (Fmake_string):
+        * character.c (string_escape_byte8):
+        * coding.c (coding_alloc_by_realloc):
+        * doprnt.c (doprnt):
+        * editfns.c (Fformat):
+        * eval.c (verror):
+        Use STRING_BYTES_MAX, not MOST_POSITIVE_FIXNUM,
+        since they may not be the same number.
+        * editfns.c (Finsert_char):
+        * fileio.c (Finsert_file_contents):
+        Likewise for BUF_BYTES_MAX.
+
         Use ptrdiff_t, not int, for sizes.
         * image.c (slurp_file): Switch from int to ptrdiff_t.
         All uses changed.