/*

* Copyright (c) [2016] [ <ether.camp> ]

* 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 <http://www.gnu.org/licenses/>.

*/

package org.tron.utils;

import org.spongycastle.util.encoders.Hex;

import java.math.BigInteger;

import java.nio.ByteBuffer;

public class ByteArray {

public static final byte[] EMPTY_BYTE_ARRAY = new byte[0];

public static String toHexString(byte[] data) {

return data == null ? "" : Hex.toHexString(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 == 1) {

data = "0" + data;

}

return Hex.decode(data);

}

public static long toLong(byte[] b) {

if (b == null || b.length == 0) {

return 0;

}

return new BigInteger(1, b).longValue();

}

public static byte[] fromString(String str) {

if (str == null) {

return null;

}

return str.getBytes();

}

public static String toStr(byte[] byteArray) {

if (byteArray == null) {

return null;

}

return new String(byteArray);

}

public static byte[] fromLong(long val) {

return ByteBuffer.allocate(8).putLong(val).array();

}

}