Implement bit utility class

1 files changed, 35 insertions, 0 deletions

diff --git a/src/org/traccar/helper/BitUtil.java b/src/org/traccar/helper/BitUtil.java
new file mode 100644
index 000000000..6e03e6d2a
--- /dev/null
+++ b/src/org/traccar/helper/BitUtil.java
@@ -0,0 +1,35 @@
+/*
+ * Copyright 2015 Anton Tananaev (anton.tananaev@gmail.com)
+ *
+ * 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 org.traccar.helper;
+
+/**
+ * Useful functions to work with bits
+ */
+public class BitUtil {
+    
+    public static boolean check(long number, int index) {
+        return (number & (1 << index)) != 0;
+    }
+    
+    public static int range(int number, int index, int length) {
+        return (number >> index) & ((1 << length) - 1);
+    }
+    
+    public static long range(long number, int index, int length) {
+        return (number >> index) & ((1l << length) - 1);
+    }
+    
+}