Add helper method WritePointerNode.writePointerArray

Author: fangerer

graalpython/com.oracle.graal.python/src/com/oracle/graal/python/builtins/objects/cext/structs/CStructAccess.java

@@ -1120,7 +1120,7 @@ public final void writeIntArray(Object pointer, int[] values) {
 
         public final void writeIntArray(Object pointer, int[] values, int length, int sourceOffset, int targetOffset) {
             for (int i = 0; i < length; i++) {
-                execute(pointer, (i + targetOffset) * Long.BYTES, values[i + sourceOffset]);
+                execute(pointer, (long) (i + targetOffset) * Long.BYTES, values[i + sourceOffset]);
             }
         }
 
@@ -1184,6 +1184,12 @@ public final void writeArrayElement(Object pointer, long element, Object value)
             execute(pointer, element * POINTER_SIZE, value);
         }
 
+        public final void writePointerArray(Object pointer, long[] values, int length, int sourceOffset, int targetOffset) {
+            for (int i = 0; i < length; i++) {
+                execute(pointer, (i + targetOffset) * POINTER_SIZE, values[i + sourceOffset]);
+            }
+        }
+
         @Specialization
         static void writeLong(long pointer, long offset, Object value,
                         @Bind("this") Node inliningTarget,