73 lines
2.4 KiB
Java
73 lines
2.4 KiB
Java
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/*
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* Copyright (C) 2010 Ken Ellinwood.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package kellinwood.security.zipsigner;
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import java.io.IOException;
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import java.io.ByteArrayOutputStream;
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/** Produces the classic hex dump with an address column, hex data
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* section (16 bytes per row) and right-column printable character dislpay.
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*/
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public class HexDumpEncoder
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{
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static HexEncoder encoder = new HexEncoder();
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public static String encode( byte[] data) {
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try {
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ByteArrayOutputStream baos = new ByteArrayOutputStream();
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encoder.encode( data, 0, data.length, baos);
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byte[] hex = baos.toByteArray();
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StringBuilder hexDumpOut = new StringBuilder();
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for (int i = 0; i < hex.length; i += 32) {
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int max = Math.min(i+32, hex.length);
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StringBuilder hexOut = new StringBuilder();
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StringBuilder chrOut = new StringBuilder();
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hexOut.append( String.format("%08x: ", (i/2)));
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for (int j = i; j < max; j+= 2) {
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hexOut.append( Character.valueOf( (char)hex[j]));
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hexOut.append( Character.valueOf( (char)hex[j+1]));
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if ((j+2) % 4 == 0) hexOut.append( ' ');
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int dataChar = data[j/2];
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if (dataChar >= 32 && dataChar < 127) chrOut.append( Character.valueOf( (char)dataChar));
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else chrOut.append( '.');
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}
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hexDumpOut.append( hexOut.toString());
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for (int k = hexOut.length(); k < 50; k++) hexDumpOut.append(' ');
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hexDumpOut.append( " ");
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hexDumpOut.append( chrOut);
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hexDumpOut.append("\n");
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}
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return hexDumpOut.toString();
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}
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catch (IOException x) {
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throw new IllegalStateException( x.getClass().getName() + ": " + x.getMessage());
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}
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}
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}
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