Glavo commented on code in PR #254:
URL: https://github.com/apache/commons-imaging/pull/254#discussion_r1342192570


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src/main/java/org/apache/commons/imaging/internal/SafeOperations.java:
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@@ -0,0 +1,49 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.commons.imaging.internal;
+
+import java.util.Arrays;
+
+/**
+ * Provides safe arithmetic operations to avoid, for example,
+ * numeric overflows.
+ *
+ * @since 1.0-alpha4
+ */
+public class SafeOperations {
+
+    /**
+     * Applies {@link Math#addExact(int, int)} to a variable
+     * length array of integers.
+     *
+     * @param values variable length array of integers.
+     * @return the values safely added.
+     */
+    public static int add(int... values) {
+        if (values == null || values.length < 2) {
+            throw new IllegalArgumentException("You must provide at least two 
elements to be added");
+        }
+        return Arrays

Review Comment:
   > I didn't think too much about this class yet. Wrote the first version that 
came to my mind without worrying about optimizing it. Maybe we can check if 
that becomes an issue and fix it if needed?
   
   Maybe. It's really not that noticeable compared to the I/O overhead. 



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