- /*
- * The Apache Software License, Version 1.1
- *
- *
- * Copyright (c) 1999-2002 The Apache Software Foundation. All rights
- * reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
- * distribution.
- *
- * 3. The end-user documentation included with the redistribution,
- * if any, must include the following acknowledgment:
- * "This product includes software developed by the
- * Apache Software Foundation (http://www.apache.org/)."
- * Alternately, this acknowledgment may appear in the software itself,
- * if and wherever such third-party acknowledgments normally appear.
- *
- * 4. The names "Xerces" and "Apache Software Foundation" must
- * not be used to endorse or promote products derived from this
- * software without prior written permission. For written
- * permission, please contact apache@apache.org.
- *
- * 5. Products derived from this software may not be called "Apache",
- * nor may "Apache" appear in their name, without prior written
- * permission of the Apache Software Foundation.
- *
- * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
- * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
- * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
- * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
- * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
- * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
- * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
- * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- * ====================================================================
- *
- * This software consists of voluntary contributions made by many
- * individuals on behalf of the Apache Software Foundation and was
- * originally based on software copyright (c) 1999, International
- * Business Machines, Inc., http://www.apache.org. For more
- * information on the Apache Software Foundation, please see
- * <http://www.apache.org/>.
- */
-
- package com.sun.org.apache.xerces.internal.impl.dv.util;
-
- /**
- * format validation
- *
- * This class encodes/decodes hexadecimal data
- * @author Jeffrey Rodriguez
- * @version $Id: HexBin.java,v 1.8 2003/05/08 20:11:55 elena Exp $
- */
- public final class HexBin {
- static private final int BASELENGTH = 255;
- static private final int LOOKUPLENGTH = 16;
- static final private byte [] hexNumberTable = new byte[BASELENGTH];
- static final private char [] lookUpHexAlphabet = new char[LOOKUPLENGTH];
-
-
- static {
- for (int i = 0; i<BASELENGTH; i++ ) {
- hexNumberTable[i] = -1;
- }
- for ( int i = '9'; i >= '0'; i--) {
- hexNumberTable[i] = (byte) (i-'0');
- }
- for ( int i = 'F'; i>= 'A'; i--) {
- hexNumberTable[i] = (byte) ( i-'A' + 10 );
- }
- for ( int i = 'f'; i>= 'a'; i--) {
- hexNumberTable[i] = (byte) ( i-'a' + 10 );
- }
-
- for(int i = 0; i<10; i++ )
- lookUpHexAlphabet[i] = (char)('0'+i);
- for(int i = 10; i<=15; i++ )
- lookUpHexAlphabet[i] = (char)('A'+i -10);
- }
-
- /**
- * Encode a byte array to hex string
- *
- * @param binaryData array of byte to encode
- * @return return encoded string
- */
- static public String encode(byte[] binaryData) {
- if (binaryData == null)
- return null;
- int lengthData = binaryData.length;
- int lengthEncode = lengthData * 2;
- char[] encodedData = new char[lengthEncode];
- int temp;
- for (int i = 0; i < lengthData; i++) {
- temp = binaryData[i];
- if (temp < 0)
- temp += 256;
- encodedData[i*2] = lookUpHexAlphabet[temp >> 4];
- encodedData[i*2+1] = lookUpHexAlphabet[temp & 0xf];
- }
- return new String(encodedData);
- }
-
- /**
- * Decode hex string to a byte array
- *
- * @param binaryData encoded string
- * @return return array of byte to encode
- */
- static public byte[] decode(String encoded) {
- if (encoded == null)
- return null;
- int lengthData = encoded.length();
- if (lengthData % 2 != 0)
- return null;
-
- char[] binaryData = encoded.toCharArray();
- int lengthDecode = lengthData / 2;
- byte[] decodedData = new byte[lengthDecode];
- byte temp1, temp2;
- for( int i = 0; i<lengthDecode; i++ ){
- temp1 = hexNumberTable[binaryData[i*2]];
- if (temp1 == -1)
- return null;
- temp2 = hexNumberTable[binaryData[i*2+1]];
- if (temp2 == -1)
- return null;
- decodedData[i] = (byte)((temp1 << 4) | temp2);
- }
- return decodedData;
- }
- }