Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
/*
 * jPOS Project [http://jpos.org]
 * Copyright (C) 2000-2012 Alejandro P. Revilla
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * This program 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 Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

public class Main {
    /**
     * @param   b       source byte array
     * @param   offset  starting offset
     * @param   len     number of bytes in destination (processes len*2)
     * @return  byte[len]
     */
    public static byte[] hex2byte(byte[] b, int offset, int len) {
        byte[] d = new byte[len];
        for (int i = 0; i < len * 2; i++) {
            int shift = i % 2 == 1 ? 0 : 4;
            d[i >> 1] |= Character.digit((char) b[offset + i], 16) << shift;
        }
        return d;
    }

    /**
     * @param s source string (with Hex representation)
     * @return byte array
     */
    public static byte[] hex2byte(String s) {
        if (s.length() % 2 == 0) {
            return hex2byte(s.getBytes(), 0, s.length() >> 1);
        } else {
            // Padding left zero to make it even size #Bug raised by tommy
            return hex2byte("0" + s);
        }
    }
}