org.springframework.boot.loader.jar.Bytes Maven / Gradle / Ivy

/*
 * Copyright 2012-2019 the original author or authors.
 *
 * 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
 *
 *      https://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.springframework.boot.loader.jar;

/**
 * Utilities for dealing with bytes from ZIP files.
 *
 * @author Phillip Webb
 */
final class Bytes {

	private Bytes() {
	}

	static long littleEndianValue(byte[] bytes, int offset, int length) {
		long value = 0;
		for (int i = length - 1; i >= 0; i--) {
			value = ((value << 8) | (bytes[offset + i] & 0xFF));
		}
		return value;
	}

}