X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ian/git?a=blobdiff_plain;f=hbytes%2Fhbytes.c;h=dc1c19bfe84ffbcf6d0adfb911839e6e5fda1004;hb=62f8f2f13b024b49dfbed2b2839ec510ad37eb85;hp=5daecd1c5038437357fb896f1bd9d4e4b9044005;hpb=5dca360f2da544c9b6baf9d18ad8cd0b0e073e60;p=chiark-tcl.git

diff --git a/hbytes/hbytes.c b/hbytes/hbytes.c
index 5daecd1..dc1c19b 100644
--- a/hbytes/hbytes.c
+++ b/hbytes/hbytes.c
@@ -1,6 +1,6 @@
 /*
  * hbytes - hex-stringrep efficient byteblocks for Tcl
- * Copyright 2006 Ian Jackson
+ * Copyright 2006-2012 Ian Jackson
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License as
@@ -13,9 +13,7 @@
  * General Public License for more details.
  *
  * You should have received a copy of the GNU General Public License
- * along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
- * 02110-1301, USA.
+ * along with this library; if not, see <http://www.gnu.org/licenses/>.
  */
 
 
@@ -98,6 +96,8 @@ Byte *cht_hb_prepend(HBytes_Value *hb, int el) {
   Byte *old_block, *new_block, *new_dstart;
 
   cx= complex(hb);
+
+  assert(el < INT_MAX/4 && cx->len < INT_MAX/2);
   
   if (cx->prespace < el) {
     new_prespace= el*2 + cx->len;
@@ -121,6 +121,7 @@ Byte *cht_hb_append(HBytes_Value *hb, int el) {
   Byte *newpart, *new_block, *old_block;
 
   cx= complex(hb);
+  assert(el < INT_MAX/4 && cx->len < INT_MAX/4);
 
   new_len= cx->len + el;
   if (new_len > cx->avail) {