124 lines
3.4 KiB
Java
124 lines
3.4 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.os.prodos;
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import com.webcodepro.applecommander.util.AppleUtil;
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/**
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* Provides common subdirectory attributes.
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* <p>
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* Date created: Oct 5, 2002 11:17:57 PM
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* @author Rob Greene
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*/
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public class ProdosSubdirectoryHeader extends ProdosCommonDirectoryHeader {
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private ProdosDirectoryEntry directoryEntry;
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/**
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* Constructor for ProdosSubdirectoryHeader.
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*/
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public ProdosSubdirectoryHeader(ProdosFormatDisk disk, int block) {
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super(disk, block);
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}
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/**
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* Return the name of this subdirectory.
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*/
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public String getSubdirectoryName() {
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return AppleUtil.getProdosString(readFileEntry(), 0);
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}
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/**
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* Return the block number of the parent directory which contains the
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* file entry for this subdirectory.
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*/
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public int getParentPointer() {
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return AppleUtil.getWordValue(readFileEntry(), 0x23);
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}
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/**
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* Set the block number of the parent directory which contains the
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* file entry for this subdirectory.
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*/
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public void setParentPointer(int block) {
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byte[] data = readFileEntry();
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AppleUtil.setWordValue(data, 0x23, block);
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writeFileEntry(data);
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}
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/**
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* Return the number of the file entry within the parent block.
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*/
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public int getParentEntry() {
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return AppleUtil.getUnsignedByte(readFileEntry()[0x25]);
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}
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/**
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* Sets the number of the file entry within the parent block.
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*/
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public void setParentEntry(int entryNum) {
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byte[] data = readFileEntry();
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data[0x25] = (byte) entryNum;
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writeFileEntry(data);
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}
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/**
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* Return the length of the parent entry.
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*/
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public int getParentEntryLength() {
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return AppleUtil.getWordValue(readFileEntry(), 0x26);
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}
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/**
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* Sets the number of the file entry within the parent block.
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*/
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public void setParentEntryLength(int length) {
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byte[] data = readFileEntry();
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data[0x26] = (byte) length;
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writeFileEntry(data);
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}
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/**
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* Set the related ProDOS directory entry.
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*/
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public void setProdosDirectoryEntry(ProdosDirectoryEntry directoryEntry) {
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this.directoryEntry = directoryEntry;
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}
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/**
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* Get the related ProDOS directory entry.
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*/
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public ProdosDirectoryEntry getProdosDirectoryEntry() {
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return directoryEntry;
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}
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/**
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* Set up some housekeeping bits
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*/
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public void setHousekeeping() {
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byte[] data = readFileEntry();
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data[0x00] = (byte) (0xe0 | (data[0x00] & 0x0f)); // Subdirectories have the high nibble set to 0x0e
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data[0x10] = 0x75; // Reserved - must be $75
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data[0x1f] = (byte) ENTRY_LENGTH;
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data[0x20] = 0x0d;
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AppleUtil.setWordValue(data, 0x21, 0); // Set file count to zero
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writeFileEntry(data);
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}
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}
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