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Robert Greene 2002-12-15 20:59:05 +00:00
parent ecd6a262b2
commit 6c79c05f14
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src/com/webcodepro/applecommander/storage/DiskHelper.java
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/*
* AppleCommander - An Apple ][ image utility.
* Copyright (C) 2002 by Robert Greene
* robgreene at users.sourceforge.net
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*
* 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 General Public License
* for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
package com.webcodepro.applecommander.storage;
import java.io.ByteArrayOutputStream;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.zip.GZIPInputStream;
/**
* Helper class to load Apple2 disk images.
* This class identifies the format, and the type of disk, loading the
* appropriate disk management class.
* <p>
* Date created: Oct 3, 2002 10:54:34 PM
* @author: Rob Greene
* @deprecated
*/
public class DiskHelper {
public static final int APPLE_140KB_DISK = 143360;
public static final int APPLE_800KB_DISK = 819200;
public static final int APPLE_800KB_2IMG_DISK = APPLE_800KB_DISK + 0x40;
/**
* Load an Apple2 disk from a given filename.
* Determine type of disk, load approparitely, and
* construct the appropriate Disk object.
*/
public static FormattedDisk load(String filename) throws IOException {
if (filename == null) return null;
byte[] diskImage = loadDisk(filename);
Disk test = new Disk(filename, diskImage);
if (test.isProdosFormat()) {
return new ProdosFormatDisk(filename, diskImage);
} else if (test.isDosFormat()) {
return new DosFormatDisk(filename, diskImage);
} else if (test.isPascalFormat()) {
return new PascalFormatDisk(filename, diskImage);
} else if (test.isRdosFormat()) {
return new RdosFormatDisk(filename, diskImage);
}
// FIXME: Should return unknown disk Disk
return null;
}
/**
* Read in a disk in the same order as the image.
* Disk itself will handle location translation.
*/
private static byte[] loadDisk(String filename) throws IOException {
InputStream input = new FileInputStream(filename);
if (filename.toLowerCase().endsWith(".gz")) {
input = new GZIPInputStream(input);
}
int diskSize = APPLE_140KB_DISK;
if (filename.toLowerCase().endsWith(".2img") || filename.toLowerCase().endsWith(".2mg")) {
diskSize = APPLE_800KB_2IMG_DISK;
}
ByteArrayOutputStream diskImage =
new ByteArrayOutputStream(diskSize);
byte[] data = new byte[1024];
int bytes;
while ((bytes = input.read(data)) > 0) {
diskImage.write(data, 0, bytes);
}
input.close();
return diskImage.toByteArray();
}
}