content: /*
  	This file is part of the OdinMS Maple Story Server
      Copyright (C) 2008 Patrick Huy <patrick.huy@frz.cc>
  		       Matthias Butz <matze@odinms.de>
  		       Jan Christian Meyer <vimes@odinms.de>
  
      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 version 3 as published by
      the Free Software Foundation. You may not use, modify or distribute
      this program under any other version of the GNU Affero General Public
      License.
  
      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/>.
  */
  package tools;
  
  import constants.string.CharsetConstants;
  import java.io.ByteArrayOutputStream;
  
  public class HexTool {
      private static final char[] HEX = {'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F'};
  
      private static String toString(byte byteValue) {
          int tmp = byteValue << 8;
          char[] retstr = new char[]{HEX[(tmp >> 12) & 0x0F], HEX[(tmp >> 8) & 0x0F]};
          return String.valueOf(retstr);
      }
  
      public static String toString(byte[] bytes) {
          StringBuilder hexed = new StringBuilder();
          for (int i = 0; i < bytes.length; i++) {
              hexed.append(toString(bytes[i]));
              hexed.append(' ');
          }
          return hexed.substring(0, hexed.length() - 1);
      }
      
      public static String toCompressedString(byte[] bytes) {
          StringBuilder hexed = new StringBuilder();
          for (int i = 0; i < bytes.length; i++) {
              hexed.append(toString(bytes[i]));
          }
          return hexed.substring(0, hexed.length());
      }
  
      public static byte[] getByteArrayFromHexString(String hex) {
          ByteArrayOutputStream baos = new ByteArrayOutputStream();
          int nexti = 0;
          int nextb = 0;
          boolean highoc = true;
          outer:
          for (;;) {
              int number = -1;
              while (number == -1) {
                  if (nexti == hex.length()) {
                      break outer;
                  }
                  char chr = hex.charAt(nexti);
                  if (chr >= '0' && chr <= '9') {
                      number = chr - '0';
                  } else if (chr >= 'a' && chr <= 'f') {
                      number = chr - 'a' + 10;
                  } else if (chr >= 'A' && chr <= 'F') {
                      number = chr - 'A' + 10;
                  } else {
                      number = -1;
                  }
                  nexti++;
              }
              if (highoc) {
                  nextb = number << 4;
                  highoc = false;
              } else {
                  nextb |= number;
                  highoc = true;
                  baos.write(nextb);
              }
          }
          return baos.toByteArray();
      }
      
      public static final String toStringFromAscii(final byte[] bytes) {
          byte[] ret = new byte[bytes.length];
          for (int x = 0; x < bytes.length; x++) {
              if (bytes[x] < 32 && bytes[x] >= 0) {
                  ret[x] = '.';
              } else {
                  int chr = ((short) bytes[x]) & 0xFF;
                  ret[x] = (byte) chr;
              }
          }
          String encode = CharsetConstants.MAPLE_TYPE.getAscii();
          try {
              String str = new String(ret, encode);
              return str;
          } catch (Exception e) {}
          return "";
      }
  
  }
  