mirror of
https://github.com/AppleCommander/AppleCommander.git
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Modiifed to read and write file entry from disk; added write type
functions - delete, setFileData *save*, setFilename, etc.
This commit is contained in:
Robert Greene
parent
4134c0ab59
commit
931dba7747
@ -30,16 +30,60 @@ import java.util.List;
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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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/**
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* Indicates the length in bytes of the DOS file entry field.
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*/
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public static final int FILE_DESCRIPTIVE_ENTRY_LENGTH = 35;
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/**
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* Holds the disk the FileEntry is attached to.
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*/
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private DosFormatDisk disk;
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/**
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* Track of the FileEntry location.
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*/
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private int track;
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/**
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* Sector of the FileEntry location.
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*/
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private int sector;
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/**
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* Offset into sector of FileEntry location.
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*/
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private int offset;
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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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public DosFileEntry(DosFormatDisk disk, int track, int sector, int offset) {
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super();
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this.fileEntry = fileEntry;
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this.disk = disk;
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this.track = track;
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this.sector = sector;
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this.offset = offset;
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}
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/**
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* Read the FileEntry from the disk image.
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*/
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protected byte[] readFileEntry() {
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byte[] sectorData = disk.readSector(track, sector);
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byte[] fileEntry = new byte[FILE_DESCRIPTIVE_ENTRY_LENGTH];
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System.arraycopy(sectorData, offset, fileEntry, 0, fileEntry.length);
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return fileEntry;
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}
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/**
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* Write the FileEntry to the disk image.
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*/
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protected void writeFileEntry(byte[] fileEntry) {
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if (fileEntry.length != FILE_DESCRIPTIVE_ENTRY_LENGTH) {
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throw new IllegalArgumentException(
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"A DOS 3.3 file entry must be " + FILE_DESCRIPTIVE_ENTRY_LENGTH
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+ " bytes long!");
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}
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byte[] sectorData = disk.readSector(track, sector);
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System.arraycopy(fileEntry, 0, sectorData, offset, fileEntry.length);
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disk.writeSector(track, sector, sectorData);
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}
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/**
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@ -47,12 +91,16 @@ public class DosFileEntry implements FileEntry {
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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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return AppleUtil.getString(readFileEntry(), 3, 30).trim();
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}
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/**
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* Set the name of this file.
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*/
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public void setFilename(String filename) {
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byte[] data = readFileEntry();
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AppleUtil.setString(data, 3, filename.toUpperCase(), 30);
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writeFileEntry(data);
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}
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/**
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@ -60,7 +108,7 @@ public class DosFileEntry implements FileEntry {
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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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int filetype = (AppleUtil.getUnsignedByte(readFileEntry()[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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@ -75,12 +123,44 @@ public class DosFileEntry implements FileEntry {
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return "?"; // should never occur (read the code!)
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}
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/**
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* Set the filetype.
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*/
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public void setFiletype(String filetype) {
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byte[] data = readFileEntry();
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int type = 0x04; // assume binary
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if ("T".equals(filetype)) type = 0x00;
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if ("I".equals(filetype)) type = 0x01;
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if ("A".equals(filetype)) type = 0x02;
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if ("B".equals(filetype)) type = 0x04;
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if ("S".equals(filetype)) type = 0x08;
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if ("R".equals(filetype)) type = 0x10;
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if ("a".equals(filetype)) type = 0x20;
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if ("b".equals(filetype)) type = 0x40;
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type = (type | (data[2] & 0x80));
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data[2] = (byte) type;
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writeFileEntry(data);
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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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return (readFileEntry()[2] & 0x80) != 0;
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}
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/**
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* Set the lock indicator.
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*/
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public void setLocked(boolean lock) {
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byte[] data = readFileEntry();
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if (lock) {
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data[2] = (byte)(AppleUtil.getUnsignedByte(data[2]) | 0x80);
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} else {
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data[2] = (byte)(AppleUtil.getUnsignedByte(data[2]) & 0x7f);
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}
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writeFileEntry(data);
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}
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/**
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@ -110,8 +190,16 @@ public class DosFileEntry implements FileEntry {
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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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return AppleUtil.getWordValue(readFileEntry(), 0x21);
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}
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/**
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* Set the number of sectors used.
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*/
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public void setSectorsUsed(int sectorsUsed) {
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byte[] data = readFileEntry();
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data[0x21] = (byte) sectorsUsed;
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writeFileEntry(data);
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}
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/**
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@ -136,7 +224,18 @@ public class DosFileEntry implements FileEntry {
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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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return AppleUtil.getUnsignedByte(readFileEntry()[0]) == 0xff;
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}
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/**
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* Delete this file.
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*/
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public void delete() {
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disk.freeSectors(this);
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byte[] fileEntry = readFileEntry();
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fileEntry[0x20] = fileEntry[0x00];
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fileEntry[0x00] = (byte)0xff;
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writeFileEntry(fileEntry);
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}
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/**
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@ -180,14 +279,32 @@ public class DosFileEntry implements FileEntry {
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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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return AppleUtil.getUnsignedByte(readFileEntry()[0x00]);
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}
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/**
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* Set the track of the first track/sector list sector.
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*/
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public void setTrack(int track) {
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byte[] data = readFileEntry();
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data[0x00] = (byte) track;
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writeFileEntry(data);
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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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return AppleUtil.getUnsignedByte(readFileEntry()[0x01]);
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}
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/**
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* Set the sector of the first track/sector list sector.
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*/
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public void setSector(int sector) {
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byte[] data = readFileEntry();
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data[0x01] = (byte) sector;
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writeFileEntry(data);
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}
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/**
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@ -210,6 +327,35 @@ public class DosFileEntry implements FileEntry {
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}
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return filedata;
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}
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/**
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* Set the file data. This is essentially the save operation.
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* Specifically, if the filetype is binary, the length and
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* address need to be set. If the filetype is applesoft or
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* integer basic, the start address needs to be set.
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*/
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public void setFileData(byte[] data) throws DiskFullException {
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if (isBinaryFile()) {
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byte[] filedata = new byte[data.length + 4];
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// FIXME - address is not handled for binary files at this time!
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AppleUtil.setWordValue(filedata, 0, 0);
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AppleUtil.setWordValue(filedata, 2, data.length);
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System.arraycopy(data, 0, filedata, 4, data.length);
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disk.setFileData(this, filedata);
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} else if (isApplesoftBasicFile() || isIntegerBasicFile()) {
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byte[] filedata = new byte[data.length + 2];
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AppleUtil.setWordValue(filedata, 0, data.length);
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System.arraycopy(data, 0, filedata, 2, data.length);
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disk.setFileData(this, filedata);
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} else if (isTextFile()) {
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for (int i=0; i<data.length; i++) {
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data[i] = (byte)(data[i] | 0x80);
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}
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disk.setFileData(this, data);
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} else {
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disk.setFileData(this, data);
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}
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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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