2003-03-11 04:24:36 +00:00
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/*
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* AppleCommander - An Apple ][ image utility.
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* Copyright (C) 2002-2003 by Robert Greene
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* robgreene at users.sourceforge.net
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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package com.webcodepro.applecommander.storage;
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2003-09-01 03:27:06 +00:00
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import com.webcodepro.applecommander.util.AppleUtil;
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2003-05-26 21:10:50 +00:00
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2003-03-11 04:24:36 +00:00
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import java.io.ByteArrayOutputStream;
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import java.io.PrintWriter;
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/**
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* Filter the given file data to be the appropriate length.
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* <p>
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* Date created: Nov 2, 2002 9:07:52 PM
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* @author: Rob Greene
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*/
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public class HexDumpFileFilter implements FileFilter {
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/**
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* This is the number of bytes to display per line.
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*/
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private static final int BYTES_PER_LINE = 16;
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/**
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* This is the ASCII space character as used by the Apple ][.
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* The high bit is off.
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*/
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private static final int APPLE_SPACE = 0x20;
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/**
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* Constructor for BinaryFileFilter.
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*/
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public HexDumpFileFilter() {
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super();
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}
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/**
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* Create the hex dump format. This is in the general form of:<br>
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* MMMMMM: HH HH HH HH HH HH HH HH HH HH HH HH HH HH HH HH AAAAAAAA AAAAAAAA<br>
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* Where MMMMMM = memory address, HH = hex byte, and
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* A = ASCII character.
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* @see com.webcodepro.applecommander.storage.FileFilter#filter(byte[])
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*/
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public byte[] filter(FileEntry fileEntry) {
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byte[] fileData = fileEntry.getFileData();
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ByteArrayOutputStream output = new ByteArrayOutputStream();
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PrintWriter printer = new PrintWriter(output);
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printer.print(" Offset ");
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printer.print("Hex Data ");
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printer.println("Characters");
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printer.print("======= ");
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printer.print("================================================ ");
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printer.println("=================");
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for (int offset=0; offset<fileData.length; offset+= BYTES_PER_LINE) {
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printer.print("$");
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printer.print(AppleUtil.getFormatted3ByteAddress(offset));
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printer.print(" ");
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for (int b=0; b<BYTES_PER_LINE; b++) {
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if (b == BYTES_PER_LINE / 2) printer.print(' ');
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int index = offset+b;
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printer.print( (index < fileData.length) ?
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AppleUtil.getFormattedByte(fileData[index]) : "..");
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printer.print(' ');
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}
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printer.print(' ');
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for (int a=0; a<BYTES_PER_LINE; a++) {
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if (a == BYTES_PER_LINE / 2) printer.print(' ');
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int index = offset+a;
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if (index < fileData.length) {
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char ch = (char) (fileData[index] & 0x7f);
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if ((byte)ch >= (byte)APPLE_SPACE) {
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printer.print(ch);
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} else {
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printer.print('.');
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}
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} else {
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printer.print(' ');
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}
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}
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printer.println();
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}
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printer.println("** END **");
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printer.flush();
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printer.close();
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return output.toByteArray();
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}
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/**
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* Give suggested file name.
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*/
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public String getSuggestedFileName(FileEntry fileEntry) {
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String fileName = fileEntry.getFilename().trim();
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if (!fileName.toLowerCase().endsWith(".txt")) {
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fileName = fileName + ".txt";
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}
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return fileName;
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}
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}
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