95 lines
3.3 KiB
Java
95 lines
3.3 KiB
Java
/*
|
|
* 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.apache.coyote.http2;
|
|
|
|
/**
|
|
* Utility class for extracting values from byte arrays.
|
|
*/
|
|
public class ByteUtil {
|
|
|
|
private ByteUtil() {
|
|
// Hide default constructor
|
|
}
|
|
|
|
|
|
public static boolean isBit7Set(byte input) {
|
|
return (input & 0x80) != 0;
|
|
}
|
|
|
|
|
|
public static int get31Bits(byte[] input, int firstByte) {
|
|
return ((input[firstByte] & 0x7F) << 24) + ((input[firstByte + 1] & 0xFF) << 16) +
|
|
((input[firstByte + 2] & 0xFF) << 8) + (input[firstByte + 3] & 0xFF);
|
|
}
|
|
|
|
|
|
public static void set31Bits(byte[] output, int firstByte, int value) {
|
|
output[firstByte] = (byte) ((value & 0x7F000000) >> 24);
|
|
output[firstByte + 1] = (byte) ((value & 0xFF0000) >> 16);
|
|
output[firstByte + 2] = (byte) ((value & 0xFF00) >> 8);
|
|
output[firstByte + 3] = (byte) (value & 0xFF);
|
|
}
|
|
|
|
|
|
public static int getOneByte(byte[] input, int pos) {
|
|
return (input[pos] & 0xFF);
|
|
}
|
|
|
|
|
|
public static int getTwoBytes(byte[] input, int firstByte) {
|
|
return ((input[firstByte] & 0xFF) << 8) + (input[firstByte + 1] & 0xFF);
|
|
}
|
|
|
|
|
|
public static int getThreeBytes(byte[] input, int firstByte) {
|
|
return ((input[firstByte] & 0xFF) << 16) + ((input[firstByte + 1] & 0xFF) << 8) +
|
|
(input[firstByte + 2] & 0xFF);
|
|
}
|
|
|
|
|
|
public static void setOneBytes(byte[] output, int firstByte, int value) {
|
|
output[firstByte] = (byte) (value & 0xFF);
|
|
}
|
|
|
|
|
|
public static void setTwoBytes(byte[] output, int firstByte, int value) {
|
|
output[firstByte] = (byte) ((value & 0xFF00) >> 8);
|
|
output[firstByte + 1] = (byte) (value & 0xFF);
|
|
}
|
|
|
|
|
|
public static void setThreeBytes(byte[] output, int firstByte, int value) {
|
|
output[firstByte] = (byte) ((value & 0xFF0000) >> 16);
|
|
output[firstByte + 1] = (byte) ((value & 0xFF00) >> 8);
|
|
output[firstByte + 2] = (byte) (value & 0xFF);
|
|
}
|
|
|
|
|
|
public static long getFourBytes(byte[] input, int firstByte) {
|
|
return ((long)(input[firstByte] & 0xFF) << 24) + ((input[firstByte + 1] & 0xFF) << 16) +
|
|
((input[firstByte + 2] & 0xFF) << 8) + (input[firstByte + 3] & 0xFF);
|
|
}
|
|
|
|
|
|
public static void setFourBytes(byte[] output, int firstByte, long value) {
|
|
output[firstByte] = (byte) ((value & 0xFF000000) >> 24);
|
|
output[firstByte + 1] = (byte) ((value & 0xFF0000) >> 16);
|
|
output[firstByte + 2] = (byte) ((value & 0xFF00) >> 8);
|
|
output[firstByte + 3] = (byte) (value & 0xFF);
|
|
}
|
|
}
|