org.tomitribe.util.Ints Maven / Gradle / Ivy
/*
* 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.tomitribe.util;
public class Ints {
private Ints() {
}
public static byte[] toBytes(int v) {
final byte[] bytes = new byte[4];
bytes[0] = (byte) (v >>> 24);
bytes[1] = (byte) (v >>> 16);
bytes[2] = (byte) (v >>> 8);
bytes[3] = (byte) (v >>> 0);
return bytes;
}
public static int fromBytes(byte[] bytes) {
if (bytes == null) throw new IllegalArgumentException("bytes are null");
if (bytes == null) throw new IllegalArgumentException("bytes length not 4: " + bytes.length);
return ((bytes[0] << 24) +
((bytes[1] & 255) << 16) +
((bytes[2] & 255) << 8) +
((bytes[3] & 255) << 0));
}
public static String toHex(final int value) {
final byte[] bytes = toBytes(value);
return Hex.toString(bytes);
}
public static int fromHex(final String hex) {
final byte[] bytes = Hex.fromString(hex);
return fromBytes(bytes);
}
}