272 lines
7.7 KiB
Java
272 lines
7.7 KiB
Java
/*
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* AppleCommander - An Apple ][ image utility.
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* Copyright (C) 2002 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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import java.text.NumberFormat;
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import java.util.ArrayList;
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import java.util.List;
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/**
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* Represents a DOS file entry on disk.
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* <p>
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* Date created: Oct 4, 2002 5:15:25 PM
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* @author: Rob Greene
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*/
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public class DosFileEntry implements FileEntry {
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private byte[] fileEntry;
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private DosFormatDisk disk;
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/**
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* Constructor for DosFileEntry.
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*/
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public DosFileEntry(byte[] fileEntry, DosFormatDisk disk) {
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super();
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this.fileEntry = fileEntry;
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this.disk = disk;
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}
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/**
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* Return the name of this file.
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* @see com.webcodepro.applecommander.storage.FileEntry#getFilename()
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*/
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public String getFilename() {
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byte[] filename = new byte[30];
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System.arraycopy(fileEntry, 3, filename, 0, filename.length);
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for (int i=0; i<filename.length; i++) {
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filename[i] &= 0x7f;
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}
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return new String(filename).trim();
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}
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/**
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* Return the filetype of this file.
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* @see com.webcodepro.applecommander.storage.FileEntry#getFiletype()
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*/
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public String getFiletype() {
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int filetype = (AppleUtil.getUnsignedByte(fileEntry[2]) & 0x7f);
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if (filetype == 0x00) return "T";
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// the "^" operator is exclusive or - used to ensure only that
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// bit was turned on. if others are turned on, fall through and
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// return a "?" as the file type
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if ((filetype ^ 0x01) == 0) return "I";
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if ((filetype ^ 0x02) == 0) return "A";
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if ((filetype ^ 0x04) == 0) return "B";
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if ((filetype ^ 0x08) == 0) return "S";
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if ((filetype ^ 0x10) == 0) return "R";
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if ((filetype ^ 0x20) == 0) return "a";
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if ((filetype ^ 0x40) == 0) return "b";
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return "?"; // should never occur (read the code!)
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}
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/**
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* Identify if this file is locked.
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* @see com.webcodepro.applecommander.storage.FileEntry#isLocked()
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*/
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public boolean isLocked() {
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return (fileEntry[2] & 0x80) != 0;
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}
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/**
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* Compute the size of this file (in bytes).
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* @see com.webcodepro.applecommander.storage.FileEntry#getSize()
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*/
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public int getSize() {
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byte[] rawdata = null;
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if (!isDeleted()) {
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rawdata = disk.getFileData(this);
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}
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// default to nothing special, just compute from number of sectors
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int size = (getSectorsUsed()-1) * Disk.SECTOR_SIZE;
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if (rawdata != null) {
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if ("B".equals(getFiletype())) {
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// binary
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return AppleUtil.getWordValue(rawdata, 2);
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} else if ("A".equals(getFiletype()) || "I".equals(getFiletype())) {
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// applesoft, integer basic
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return AppleUtil.getWordValue(rawdata, 0);
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}
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}
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return size;
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}
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/**
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* Compute the number of sectors used.
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*/
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public int getSectorsUsed() {
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return AppleUtil.getUnsignedByte(fileEntry[0x21])
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+ AppleUtil.getUnsignedByte(fileEntry[0x22])*16;
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}
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/**
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* Identify if this is a directory file.
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* @see com.webcodepro.applecommander.storage.FileEntry#isDirectory()
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*/
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public boolean isDirectory() {
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return false;
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}
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/**
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* Retrieve the list of files in this directory.
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* Always returns null for DOS.
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* @see com.webcodepro.applecommander.storage.FileEntry#getFiles()
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*/
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public List getFiles() {
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return null;
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}
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/**
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* Identify if this file has been deleted.
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* @see com.webcodepro.applecommander.storage.FileEntry#isDeleted()
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*/
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public boolean isDeleted() {
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return AppleUtil.getUnsignedByte(fileEntry[0]) == 0xff;
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}
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/**
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* Get the standard file column header information.
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* This default implementation is intended only for standard mode.
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* displayMode is specified in FormattedDisk.
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*/
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public List getFileColumnData(int displayMode) {
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NumberFormat numberFormat = NumberFormat.getNumberInstance();
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List list = new ArrayList();
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switch (displayMode) {
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case FormattedDisk.FILE_DISPLAY_NATIVE:
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list.add(isLocked() ? "*" : " ");
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list.add(getFiletype());
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numberFormat.setMinimumIntegerDigits(3);
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list.add(numberFormat.format(getSectorsUsed()));
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list.add(getFilename());
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break;
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case FormattedDisk.FILE_DISPLAY_DETAIL:
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list.add(isLocked() ? "*" : " ");
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list.add(getFiletype());
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list.add(getFilename());
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list.add(numberFormat.format(getSize()));
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numberFormat.setMinimumIntegerDigits(3);
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list.add(numberFormat.format(getSectorsUsed()));
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list.add(isDeleted() ? "Deleted" : "");
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list.add("T" + getTrack() + " S" + getSector());
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break;
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default: // FILE_DISPLAY_STANDARD
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list.add(getFilename());
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list.add(getFiletype());
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list.add(numberFormat.format(getSize()));
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list.add(isLocked() ? "Locked" : "");
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break;
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}
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return list;
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}
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/**
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* Get the track of first track/sector list sector.
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*/
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public int getTrack() {
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return AppleUtil.getUnsignedByte(fileEntry[0x00]);
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}
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/**
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* Get the sector of first track/sector list sector.
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*/
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public int getSector() {
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return AppleUtil.getUnsignedByte(fileEntry[0x01]);
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}
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/**
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* Get file data. This handles any operating-system specific issues.
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* Specifically, DOS 3.3 places address and length into binary files
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* and length into Applesoft files.
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*/
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public byte[] getFileData() {
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byte[] rawdata = disk.getFileData(this);
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byte[] filedata;
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if (isBinaryFile()) {
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int length = AppleUtil.getWordValue(rawdata, 2);
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filedata = new byte[length];
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System.arraycopy(rawdata, 4, filedata, 0, length);
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} else if (isApplesoftBasicFile() || isIntegerBasicFile()) {
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filedata = new byte[getSize()];
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System.arraycopy(rawdata, 2, filedata, 0, filedata.length);
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} else {
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filedata = rawdata;
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}
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return filedata;
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}
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/**
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* Get the suggested FileFilter. This appears to be operating system
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* specific, so each operating system needs to implement some manner
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* of guessing the appropriate filter.
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* FIXME - this code should be a helper class for DOS and RDOS!
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*/
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public FileFilter getSuggestedFilter() {
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if (isApplesoftBasicFile()) {
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return new ApplesoftFileFilter();
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} else if (isIntegerBasicFile()) {
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return new IntegerBasicFileFilter();
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} else if (isTextFile()) {
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return new TextFileFilter();
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} else if (isBinaryFile()) {
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int size = getSize();
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// the minimum size is guessed a bit - I don't remember, but maybe there
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// are 8 spare bytes at the end of the graphics screen
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GraphicsFileFilter filter = new GraphicsFileFilter();
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if (size >= 8185 && size <= 8192) {
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filter.setMode(GraphicsFileFilter.MODE_HGR_COLOR);
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return filter;
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} else if (size >= 16377 && size <= 16384) {
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filter.setMode(GraphicsFileFilter.MODE_DHR_COLOR);
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return filter;
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}
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// fall through to BinaryFileFilter...
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}
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return new BinaryFileFilter();
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}
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/**
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* Determine if this is a text file.
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*/
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public boolean isTextFile() {
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return "T".equals(getFiletype());
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}
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/**
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* Determine if this is an Applesoft BASIC file.
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*/
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public boolean isApplesoftBasicFile() {
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return "A".equals(getFiletype());
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}
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/**
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* Determine if this is an Integer BASIC file.
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*/
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public boolean isIntegerBasicFile() {
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return "I".equals(getFiletype());
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}
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/**
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* Determine if this is a binary file.
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*/
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public boolean isBinaryFile() {
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return "B".equals(getFiletype());
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}
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}
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