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AppleCommander
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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 2002-12-23 21:05:32 +00:00
parent 4134c0ab59
commit 931dba7747
1 changed files with 162 additions and 16 deletions
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178
src/com/webcodepro/applecommander/storage/DosFileEntry.java
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@ -30,16 +30,60 @@ import java.util.List;
* @author: Rob Greene
*/
public class DosFileEntry implements FileEntry {
private byte[] fileEntry;
/**
* Indicates the length in bytes of the DOS file entry field.
*/
public static final int FILE_DESCRIPTIVE_ENTRY_LENGTH = 35;
/**
* Holds the disk the FileEntry is attached to.
*/
private DosFormatDisk disk;
/**
* Track of the FileEntry location.
*/
private int track;
/**
* Sector of the FileEntry location.
*/
private int sector;
/**
* Offset into sector of FileEntry location.
*/
private int offset;
/**
* Constructor for DosFileEntry.
*/
public DosFileEntry(byte[] fileEntry, DosFormatDisk disk) {
public DosFileEntry(DosFormatDisk disk, int track, int sector, int offset) {
super();
this.fileEntry = fileEntry;
this.disk = disk;
this.track = track;
this.sector = sector;
this.offset = offset;
}
/**
* Read the FileEntry from the disk image.
*/
protected byte[] readFileEntry() {
byte[] sectorData = disk.readSector(track, sector);
byte[] fileEntry = new byte[FILE_DESCRIPTIVE_ENTRY_LENGTH];
System.arraycopy(sectorData, offset, fileEntry, 0, fileEntry.length);
return fileEntry;
}
/**
* Write the FileEntry to the disk image.
*/
protected void writeFileEntry(byte[] fileEntry) {
if (fileEntry.length != FILE_DESCRIPTIVE_ENTRY_LENGTH) {
throw new IllegalArgumentException(
"A DOS 3.3 file entry must be " + FILE_DESCRIPTIVE_ENTRY_LENGTH
+ " bytes long!");
}
byte[] sectorData = disk.readSector(track, sector);
System.arraycopy(fileEntry, 0, sectorData, offset, fileEntry.length);
disk.writeSector(track, sector, sectorData);
}
/**
@ -47,12 +91,16 @@ public class DosFileEntry implements FileEntry {
* @see com.webcodepro.applecommander.storage.FileEntry#getFilename()
*/
public String getFilename() {
byte[] filename = new byte[30];
System.arraycopy(fileEntry, 3, filename, 0, filename.length);
for (int i=0; i<filename.length; i++) {
filename[i] &= 0x7f;
}
return new String(filename).trim();
return AppleUtil.getString(readFileEntry(), 3, 30).trim();
}
/**
* Set the name of this file.
*/
public void setFilename(String filename) {
byte[] data = readFileEntry();
AppleUtil.setString(data, 3, filename.toUpperCase(), 30);
writeFileEntry(data);
}
/**
@ -60,7 +108,7 @@ public class DosFileEntry implements FileEntry {
* @see com.webcodepro.applecommander.storage.FileEntry#getFiletype()
*/
public String getFiletype() {
int filetype = (AppleUtil.getUnsignedByte(fileEntry[2]) & 0x7f);
int filetype = (AppleUtil.getUnsignedByte(readFileEntry()[2]) & 0x7f);
if (filetype == 0x00) return "T";
// the "^" operator is exclusive or - used to ensure only that
// bit was turned on. if others are turned on, fall through and
@ -75,12 +123,44 @@ public class DosFileEntry implements FileEntry {
return "?"; // should never occur (read the code!)
}
/**
* Set the filetype.
*/
public void setFiletype(String filetype) {
byte[] data = readFileEntry();
int type = 0x04; // assume binary
if ("T".equals(filetype)) type = 0x00;
if ("I".equals(filetype)) type = 0x01;
if ("A".equals(filetype)) type = 0x02;
if ("B".equals(filetype)) type = 0x04;
if ("S".equals(filetype)) type = 0x08;
if ("R".equals(filetype)) type = 0x10;
if ("a".equals(filetype)) type = 0x20;
if ("b".equals(filetype)) type = 0x40;
type = (type | (data[2] & 0x80));
data[2] = (byte) type;
writeFileEntry(data);
}
/**
* Identify if this file is locked.
* @see com.webcodepro.applecommander.storage.FileEntry#isLocked()
*/
public boolean isLocked() {
return (fileEntry[2] & 0x80) != 0;
return (readFileEntry()[2] & 0x80) != 0;
}
/**
* Set the lock indicator.
*/
public void setLocked(boolean lock) {
byte[] data = readFileEntry();
if (lock) {
data[2] = (byte)(AppleUtil.getUnsignedByte(data[2]) | 0x80);
} else {
data[2] = (byte)(AppleUtil.getUnsignedByte(data[2]) & 0x7f);
}
writeFileEntry(data);
}
/**
@ -110,8 +190,16 @@ public class DosFileEntry implements FileEntry {
* Compute the number of sectors used.
*/
public int getSectorsUsed() {
return AppleUtil.getUnsignedByte(fileEntry[0x21])
+ AppleUtil.getUnsignedByte(fileEntry[0x22])*16;
return AppleUtil.getWordValue(readFileEntry(), 0x21);
}
/**
* Set the number of sectors used.
*/
public void setSectorsUsed(int sectorsUsed) {
byte[] data = readFileEntry();
data[0x21] = (byte) sectorsUsed;
writeFileEntry(data);
}
/**
@ -136,7 +224,18 @@ public class DosFileEntry implements FileEntry {
* @see com.webcodepro.applecommander.storage.FileEntry#isDeleted()
*/
public boolean isDeleted() {
return AppleUtil.getUnsignedByte(fileEntry[0]) == 0xff;
return AppleUtil.getUnsignedByte(readFileEntry()[0]) == 0xff;
}
/**
* Delete this file.
*/
public void delete() {
disk.freeSectors(this);
byte[] fileEntry = readFileEntry();
fileEntry[0x20] = fileEntry[0x00];
fileEntry[0x00] = (byte)0xff;
writeFileEntry(fileEntry);
}
/**
@ -180,14 +279,32 @@ public class DosFileEntry implements FileEntry {
* Get the track of first track/sector list sector.
*/
public int getTrack() {
return AppleUtil.getUnsignedByte(fileEntry[0x00]);
return AppleUtil.getUnsignedByte(readFileEntry()[0x00]);
}
/**
* Set the track of the first track/sector list sector.
*/
public void setTrack(int track) {
byte[] data = readFileEntry();
data[0x00] = (byte) track;
writeFileEntry(data);
}
/**
* Get the sector of first track/sector list sector.
*/
public int getSector() {
return AppleUtil.getUnsignedByte(fileEntry[0x01]);
return AppleUtil.getUnsignedByte(readFileEntry()[0x01]);
}
/**
* Set the sector of the first track/sector list sector.
*/
public void setSector(int sector) {
byte[] data = readFileEntry();
data[0x01] = (byte) sector;
writeFileEntry(data);
}
/**
@ -210,6 +327,35 @@ public class DosFileEntry implements FileEntry {
}
return filedata;
}
/**
* Set the file data. This is essentially the save operation.
* Specifically, if the filetype is binary, the length and
* address need to be set. If the filetype is applesoft or
* integer basic, the start address needs to be set.
*/
public void setFileData(byte[] data) throws DiskFullException {
if (isBinaryFile()) {
byte[] filedata = new byte[data.length + 4];
// FIXME - address is not handled for binary files at this time!
AppleUtil.setWordValue(filedata, 0, 0);
AppleUtil.setWordValue(filedata, 2, data.length);
System.arraycopy(data, 0, filedata, 4, data.length);
disk.setFileData(this, filedata);
} else if (isApplesoftBasicFile() || isIntegerBasicFile()) {
byte[] filedata = new byte[data.length + 2];
AppleUtil.setWordValue(filedata, 0, data.length);
System.arraycopy(data, 0, filedata, 2, data.length);
disk.setFileData(this, filedata);
} else if (isTextFile()) {
for (int i=0; i<data.length; i++) {
data[i] = (byte)(data[i] | 0x80);
}
disk.setFileData(this, data);
} else {
disk.setFileData(this, data);
}
}
/**
* Get the suggested FileFilter. This appears to be operating system