Changeset 12777c in git for libpolys/coeffs/longrat.cc

Timestamp:

Nov 2, 2012, 2:29:36 PM (11 years ago)

Author:

Hans Schoenemann <hannes@…>

Branches:

(u'spielwiese', '0d6b7fcd9813a1ca1ed4220cfa2b104b97a0a003')

Children:

1ca456de55bbd08ae9296b88bbf5eadfe1465a57

Parents:

5caede8b6a6317efbf12384a421e0c5b35f8838d

Message:

fix: signed int overflow in nlMult

File:

• libpolys/coeffs/longrat.cc (modified) (1 diff)

libpolys/coeffs/longrat.cc

@@ -2374 +2374 @@
   if (SR_HDL(a) & SR_HDL(b) & SR_INT)
   {
-    LONG r=(SR_HDL(a)-1L)*(SR_HDL(b)>>1);
+    LONG r=(LONG)((unsigned LONG)(SR_HDL(a)-1L))*((unsigned LONG)(SR_HDL(b)>>1));
     if ((r/(SR_HDL(b)>>1))==(SR_HDL(a)-1L))
     {