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/*
* Copyright (c) 2004, 2013, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code 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
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*
* THIS FILE WAS MODIFIED BY SUN MICROSYSTEMS, INC.
*/
package com.sun.xml.internal.fastinfoset.algorithm;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import com.sun.xml.internal.org.jvnet.fastinfoset.EncodingAlgorithmException;
import com.sun.xml.internal.fastinfoset.CommonResourceBundle;
public class HexadecimalEncodingAlgorithm extends BuiltInEncodingAlgorithm {
private static final char NIBBLE_TO_HEXADECIMAL_TABLE[] =
{ '0','1','2','3','4','5','6','7',
'8','9','A','B','C','D','E','F' };
private static final int HEXADECIMAL_TO_NIBBLE_TABLE[] = {
/*'0'*/ 0,
/*'1'*/ 1,
/*'2'*/ 2,
/*'3'*/ 3,
/*'4'*/ 4,
/*'5'*/ 5,
/*'6'*/ 6,
/*'7'*/ 7,
/*'8'*/ 8,
/*'9'*/ 9, -1, -1, -1, -1, -1, -1, -1,
/*'A'*/ 10,
/*'B'*/ 11,
/*'C'*/ 12,
/*'D'*/ 13,
/*'E'*/ 14,
/*'F'*/ 15,
/*'G'-'Z'*/-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
/*'[' - '`'*/ -1, -1, -1, -1, -1, -1,
/*'a'*/ 10,
/*'b'*/ 11,
/*'c'*/ 12,
/*'d'*/ 13,
/*'e'*/ 14,
/*'f'*/ 15 };
public final Object decodeFromBytes(byte[] b, int start, int length) throws EncodingAlgorithmException {
final byte[] data = new byte[length];
System.arraycopy(b, start, data, 0, length);
return data;
}
public final Object decodeFromInputStream(InputStream s) throws IOException {
throw new UnsupportedOperationException(CommonResourceBundle.getInstance().getString("message.notImplemented"));
}
public void encodeToOutputStream(Object data, OutputStream s) throws IOException {
if (!(data instanceof byte[])) {
throw new IllegalArgumentException(CommonResourceBundle.getInstance().getString("message.dataNotByteArray"));
}
s.write((byte[])data);
}
public final Object convertFromCharacters(char[] ch, int start, int length) {
if (length == 0) {
return new byte[0];
}
StringBuilder encodedValue = removeWhitespace(ch, start, length);
int encodedLength = encodedValue.length();
if (encodedLength == 0) {
return new byte[0];
}
int valueLength = encodedValue.length() / 2;
byte[] value = new byte[valueLength];
int encodedIdx = 0;
for (int i = 0; i < valueLength; ++i) {
int nibble1 = HEXADECIMAL_TO_NIBBLE_TABLE[encodedValue.charAt(encodedIdx++) - '0'];
int nibble2 = HEXADECIMAL_TO_NIBBLE_TABLE[encodedValue.charAt(encodedIdx++) - '0'];
value[i] = (byte) ((nibble1 << 4) | nibble2);
}
return value;
}
public final void convertToCharacters(Object data, StringBuffer s) {
if (data == null) {
return;
}
final byte[] value = (byte[]) data;
if (value.length == 0) {
return;
}
s.ensureCapacity(value.length * 2);
for (int i = 0; i < value.length; ++i) {
s.append(NIBBLE_TO_HEXADECIMAL_TABLE[(value[i] >>> 4) & 0xf]);
s.append(NIBBLE_TO_HEXADECIMAL_TABLE[value[i] & 0xf]);
}
}
public final int getPrimtiveLengthFromOctetLength(int octetLength) throws EncodingAlgorithmException {
return octetLength * 2;
}
public int getOctetLengthFromPrimitiveLength(int primitiveLength) {
return primitiveLength / 2;
}
public final void encodeToBytes(Object array, int astart, int alength, byte[] b, int start) {
System.arraycopy((byte[])array, astart, b, start, alength);
}
}
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