com.drew.lang.ByteConvert Maven / Gradle / Ivy

/*
 * Copyright 2002-2017 Drew Noakes
 *
 *    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.
 *
 * More information about this project is available at:
 *
 *    https://drewnoakes.com/code/exif/
 *    https://github.com/drewnoakes/metadata-extractor
 */
package com.drew.lang;

import com.drew.lang.annotations.NotNull;

/**
 * @author Drew Noakes http://drewnoakes.com
 */
public class ByteConvert
{
    public static int toInt32BigEndian(@NotNull byte[] bytes)
    {
        return (bytes[0] << 24 & 0xFF000000) |
               (bytes[1] << 16 & 0xFF0000) |
               (bytes[2] << 8  & 0xFF00) |
               (bytes[3]       & 0xFF);
    }

    public static int toInt32LittleEndian(@NotNull byte[] bytes)
    {
        return (bytes[0]       & 0xFF) |
               (bytes[1] << 8  & 0xFF00) |
               (bytes[2] << 16 & 0xFF0000) |
               (bytes[3] << 24 & 0xFF000000);
    }
}