Changeset e75eab in git for Singular/iparith.cc

Timestamp:

Sep 27, 2011, 7:01:15 PM (12 years ago)

Author:

Hans Schoenemann <hannes@…>

Branches:

(u'spielwiese', '8e0ad00ce244dfd0756200662572aef8402f13d5')

Children:

9c79efdbfa9e07161b8b9c4ce598e1b0b476ccd1

Parents:

3fc398ae843900b0c5619932eaf10cc8eaf54ce6

Message:

fix overflow handling: jjTIMES_P, jjPOWER_P

git-svn-id: file:///usr/local/Singular/svn/trunk@14389 2c84dea3-7e68-4137-9b89-c4e89433aadc

File:

• Singular/iparith.cc (modified) (2 diffs)

Singular/iparith.cc

@@ -509 +509 @@
   int dummy;
   if ((u_p!=NULL)
-  && (pTotaldegree(u_p)*(signed long)v_i > (signed long)currRing->bitmask))
+  && ((v_i==0) ||
+       (pTotaldegree(u_p) > (signed long)currRing->bitmask)/(signed long)v_i))
   {
     Werror("OVERFLOW in power(d=%ld, e=%d, max=%ld)",
@@ -802 +803 @@
       b=(poly)v->CopyD(POLY_CMD); // works also for VECTOR_CMD
       if ((a!=NULL) && (b!=NULL)
-      && (pTotaldegree(a)+pTotaldegree(b)>si_max((long)rVar(currRing),(long)currRing->bitmask)))
+      && ((long)pTotaldegree(a)>si_max((long)rVar(currRing),(long)currRing->bitmask)-(long)pTotaldegree(b)))
       {
         Werror("OVERFLOW in mult(d=%ld, d=%ld, max=%ld)",