X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ian/git?a=blobdiff_plain;f=hbytes%2Fchop.c;h=e649b5aa12a4dce45eb4ade79de62d2347d21c06;hb=ceed4cf646a34245b3bc88089a2187ebf7a41f0f;hp=ef0e5f0b737f18f9ecd7648786f4b363fec60d60;hpb=82f88c53ddb84e42c770c23feb9bb0ee18341188;p=chiark-tcl.git

diff --git a/hbytes/chop.c b/hbytes/chop.c
index ef0e5f0..e649b5a 100644
--- a/hbytes/chop.c
+++ b/hbytes/chop.c
@@ -1,16 +1,36 @@
 /*
+ * hbytes - hex-stringrep efficient byteblocks for Tcl
+ * Copyright 2006 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
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * 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.
  */
 
+
 #include "chiark_tcl_hbytes.h"
 
 static int strs1(Tcl_Interp *ip, int strc, Tcl_Obj *const *strv, int *l_r) {
-  int rc, l, i;
+  int rc, l, i, pl;
 
   l= 0;
   for (i=1; i<strc; i++) {
     rc= Tcl_ConvertToType(ip,strv[i],&cht_hbytes_type);
     if (rc) return rc;
-    l += cht_hb_len(OBJ_HBYTES(strv[i]));
+    pl= cht_hb_len(OBJ_HBYTES(strv[i]));
+    assert(l < INT_MAX/2 && pl < INT_MAX/2);
+    l += pl;
   }
   *l_r= l;
   return TCL_OK;