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authorAnton Tananaev <anton.tananaev@gmail.com>2015-06-28 10:28:58 +1200
committerAnton Tananaev <anton.tananaev@gmail.com>2015-06-28 10:28:58 +1200
commit8ee694af98493830380e5faf96d43752002ca634 (patch)
tree0fd6be2954a2b9ad1976f7bba2461a86ca7c81b1 /src/org/traccar/helper
parentea0a523ef676310526055b1ae381387868afd738 (diff)
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Implement bit utility class
Diffstat (limited to 'src/org/traccar/helper')
-rw-r--r--src/org/traccar/helper/BitUtil.java35
1 files changed, 35 insertions, 0 deletions
diff --git a/src/org/traccar/helper/BitUtil.java b/src/org/traccar/helper/BitUtil.java
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index 000000000..6e03e6d2a
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+++ b/src/org/traccar/helper/BitUtil.java
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+/*
+ * 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);
+ }
+
+}