
org.tron.p2p.utils.ByteArray Maven / Gradle / Ivy
package org.tron.p2p.utils;
import com.google.common.primitives.Ints;
import com.google.common.primitives.Longs;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.ObjectOutputStream;
import java.math.BigInteger;
import java.util.Arrays;
import java.util.List;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang3.ArrayUtils;
import org.apache.commons.lang3.StringUtils;
import org.bouncycastle.util.encoders.Hex;
/*
* Copyright (c) [2016] [ ]
* This file is part of the ethereumJ library.
*
* The ethereumJ library is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* The ethereumJ library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with the ethereumJ library. If not, see .
*/
@Slf4j(topic = "net")
public class ByteArray {
public static final byte[] EMPTY_BYTE_ARRAY = new byte[0];
public static final byte[] ZERO_BYTE_ARRAY = new byte[] {0};
public static final int WORD_SIZE = 32;
public static String toHexString(byte[] data) {
return data == null ? "" : Hex.toHexString(data);
}
/**
* get bytes data from hex string data.
*/
public static byte[] fromHexString(String data) {
if (data == null) {
return EMPTY_BYTE_ARRAY;
}
if (data.startsWith("0x")) {
data = data.substring(2);
}
if (data.length() % 2 != 0) {
data = "0" + data;
}
return Hex.decode(data);
}
/**
* get long data from bytes data.
*/
public static long toLong(byte[] b) {
return ArrayUtils.isEmpty(b) ? 0 : new BigInteger(1, b).longValue();
}
/**
* get int data from bytes data.
*/
public static int toInt(byte[] b) {
return ArrayUtils.isEmpty(b) ? 0 : new BigInteger(1, b).intValue();
}
/**
* get bytes data from string data.
*/
public static byte[] fromString(String s) {
return StringUtils.isBlank(s) ? null : s.getBytes();
}
/**
* get string data from bytes data.
*/
public static String toStr(byte[] b) {
return ArrayUtils.isEmpty(b) ? null : new String(b);
}
public static byte[] fromLong(long val) {
return Longs.toByteArray(val);
}
public static byte[] fromInt(int val) {
return Ints.toByteArray(val);
}
/**
* get bytes data from object data.
*/
public static byte[] fromObject(Object obj) {
byte[] bytes = null;
try (ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
ObjectOutputStream objectOutputStream = new ObjectOutputStream(byteArrayOutputStream)) {
objectOutputStream.writeObject(obj);
objectOutputStream.flush();
bytes = byteArrayOutputStream.toByteArray();
} catch (IOException e) {
log.error("Method objectToByteArray failed.", e);
}
return bytes;
}
/**
* Stringify byte[] x
* null for null
* null for empty []
*/
public static String toJsonHex(byte[] x) {
return x == null || x.length == 0 ? "0x" : "0x" + Hex.toHexString(x);
}
public static String toJsonHex(Long x) {
return x == null ? null : "0x" + Long.toHexString(x);
}
public static String toJsonHex(int x) {
return toJsonHex((long) x);
}
public static String toJsonHex(String x) {
return "0x" + x;
}
public static BigInteger hexToBigInteger(String input) {
if (input.startsWith("0x")) {
return new BigInteger(input.substring(2), 16);
} else {
return new BigInteger(input, 10);
}
}
public static int jsonHexToInt(String x) throws Exception {
if (!x.startsWith("0x")) {
throw new Exception("Incorrect hex syntax");
}
x = x.substring(2);
return Integer.parseInt(x, 16);
}
/**
* Generate a subarray of a given byte array.
*
* @param input the input byte array
* @param start the start index
* @param end the end index
* @return a subarray of input, ranging from start (inclusively) to end
* (exclusively)
*/
public static byte[] subArray(byte[] input, int start, int end) {
byte[] result = new byte[end - start];
System.arraycopy(input, start, result, 0, end - start);
return result;
}
public static boolean isEmpty(byte[] input) {
return input == null || input.length == 0;
}
public static boolean matrixContains(List source, byte[] obj) {
for (byte[] sobj : source) {
if (Arrays.equals(sobj, obj)) {
return true;
}
}
return false;
}
public static String fromHex(String x) {
if (x.startsWith("0x")) {
x = x.substring(2);
}
if (x.length() % 2 != 0) {
x = "0" + x;
}
return x;
}
public static int byte2int(byte b) {
return b & 0xFF;
}
}
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