/*
* This file is part of muCommander, http://www.mucommander.com
* Copyright (C) 2002-2016 Maxence Bernard
*
* muCommander 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.
*
* muCommander 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 this program. If not, see <http://www.gnu.org/licenses/>.
*/
package com.mucommander.commons.io;
/**
* This class provides convenience static methods that operate on bits and bytes.
*
* @author Maxence Bernard
*/
public class ByteUtils {
/**
* Sets/unsets a bit in the given integer.
*
* @param i the permission int
* @param bit the bit to set
* @param enabled true to enable the bit, false to disable it
* @return the modified permission int
*/
public static int setBit(int i, int bit, boolean enabled) {
if(enabled)
i |= bit;
else
i &= ~bit;
return i;
}
/**
* Returns an hexadecimal string representation of the given byte array, where each byte is represented by two
* hexadecimal characters and padded with a zero if its value is comprised between 0 and 15 (inclusive).
* As an example, this method will return "6d75636f0a" when called with the byte array {109, 117, 99, 111, 10}.
*
* @param bytes the array of bytes for which to get an hexadecimal string representation
* @return an hexadecimal string representation of the given byte array
*/
public static String toHexString(byte bytes[]) {
StringBuffer sb = new StringBuffer();
int bytesLen = bytes.length;
String hexByte;
for(int i=0; i<bytesLen; i++) {
hexByte = Integer.toHexString(bytes[i] & 0xFF);
if(hexByte.length()==1)
sb.append('0');
sb.append(hexByte);
}
return sb.toString();
}
}