1 files changed, 42 insertions, 0 deletions
diff --git a/dx/src/com/android/dex/util/Unsigned.java b/dx/src/com/android/dex/util/Unsigned.java
new file mode 100644
index 000000000..cb50d0a40
--- /dev/null
+++ b/dx/src/com/android/dex/util/Unsigned.java
@@ -0,0 +1,42 @@
+/*
+ * Copyright (C) 2011 The Android Open Source Project
+ *
+ * Licensed 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 com.android.dex.util;
+
+/**
+ * Unsigned arithmetic over Java's signed types.
+ */
+public final class Unsigned {
+    private Unsigned() {}
+
+    public static int compare(short ushortA, short ushortB) {
+        if (ushortA == ushortB) {
+            return 0;
+        }
+        int a = ushortA & 0xFFFF;
+        int b = ushortB & 0xFFFF;
+        return a < b ? -1 : 1;
+    }
+
+    public static int compare(int uintA, int uintB) {
+        if (uintA == uintB) {
+            return 0;
+        }
+        long a = uintA & 0xFFFFFFFFL;
+        long b = uintB & 0xFFFFFFFFL;
+        return a < b ? -1 : 1;
+    }
+}