StringUtils.java

/*
 * Copyright 2012 Rui Araújo, Luís Fonseca
 *
 * This file is part of Router Keygen.
 *
 * Router Keygen is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 * 
 * Router Keygen 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 General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with Router Keygen.  If not, see <http://www.gnu.org/licenses/>.
 */
package org.exobel.routerkeygen.utils;

import java.io.UnsupportedEncodingException;

public class StringUtils {

    private static final byte[] HEX_CHAR_TABLE = {
            (byte) '0', (byte) '1', (byte) '2', (byte) '3',
            (byte) '4', (byte) '5', (byte) '6', (byte) '7',
            (byte) '8', (byte) '9', (byte) 'a', (byte) 'b',
            (byte) 'c', (byte) 'd', (byte) 'e', (byte) 'f'
    };

    static public String dectoString(int mac) {
        String ret = "";
        while (mac > 0) {
            switch (mac % 10) {
                case 0:
                    ret = "Zero" + ret;
                    break;
                case 1:
                    ret = "One" + ret;
                    break;
                case 2:
                    ret = "Two" + ret;
                    break;
                case 3:
                    ret = "Three" + ret;
                    break;
                case 4:
                    ret = "Four" + ret;
                    break;
                case 5:
                    ret = "Five" + ret;
                    break;
                case 6:
                    ret = "Six" + ret;
                    break;
                case 7:
                    ret = "Seven" + ret;
                    break;
                case 8:
                    ret = "Eight" + ret;
                    break;
                case 9:
                    ret = "Nine" + ret;
                    break;
            }
            mac /= 10;
        }
        return ret;
    }

    public static String getHexString(byte[] raw)
            throws UnsupportedEncodingException {
        byte[] hex = new byte[2 * raw.length];
        int index = 0;

        for (byte b : raw) {
            int v = b & 0xFF;
            hex[index++] = HEX_CHAR_TABLE[v >>> 4];
            hex[index++] = HEX_CHAR_TABLE[v & 0xF];
        }
        return new String(hex, "ASCII");
    }

    public static String getHexString(short[] raw)
            throws UnsupportedEncodingException {
        byte[] hex = new byte[2 * raw.length];
        int index = 0;

        for (short b : raw) {
            int v = b & 0xFF;
            hex[index++] = HEX_CHAR_TABLE[v >>> 4];
            hex[index++] = HEX_CHAR_TABLE[v & 0xF];
        }
        return new String(hex, "ASCII");
    }

    public static String getHexString(short raw) {
        byte[] hex = new byte[2];
        int v = raw & 0xFF;
        hex[0] = HEX_CHAR_TABLE[v >>> 4];
        hex[1] = HEX_CHAR_TABLE[v & 0xF];
        try {
            return new String(hex, "ASCII");
        } catch (UnsupportedEncodingException e) {
        }
        return "";
    }
}