public int getFileSize(CpmFile file)
{
int size = 0;
FCB fcb = new FCB( );
for (int i = 0; i < file.GetFCBCount( ); i++)
{
readFCB(file.GetFCBAt(i), fcb);
int ex = (fcb.getEX( ) & 0x1f) & ~dpb.exm;
int record = fcb.getRC( ) & 0xff;
size = ex * 128 + ((dpb.exm & fcb.getEX( )) + 1) * 128 - (128 - record);
//System.out.println("name "+file.name+" ext "+ex+" record "+record);
}
return(size);
}
private void writeFCB(int dir, FCB fcb)
{
int offset = dir * 32;
int sector = offset / 128;
offset = offset % 128;
readSector(sector, fcbBuffer);
for (int i = 0; i < 32; i++)
{
fcbBuffer[offset + i] = fcb.getBytes( )[i];
}
writeSector(sector, fcbBuffer);
}
public void deleteFile(int user, String name)
{
CpmFile file = searchFileException(user, name);
for ( int i = 0; i < file.GetBlockCount( ); i++ ) {
//System.out.println("Free block "+file.getBlockAt(i));
blockUsed[file.GetBlockAt(i)] = false;
}
FCB fcb = new FCB( );
for ( int i = 0; i < file.GetFCBCount( ); i++ ) {
int entry = file.GetFCBAt(i);
//System.out.println("free FCB "+entry);
readFCB(entry, fcb);
fcb.SetDeleted( );
writeFCB(entry, fcb);
directoryUsed[entry] = false;
}
files.Remove(file);
}
public void deleteFile(int user, String name)
{
CpmFile file = searchFileException(user, name);
for (int i = 0; i < file.GetBlockCount( ); i++)
{
//System.out.println("Free block "+file.getBlockAt(i));
blockUsed[file.GetBlockAt(i)] = false;
}
FCB fcb = new FCB( );
for (int i = 0; i < file.GetFCBCount( ); i++)
{
int entry = file.GetFCBAt(i);
//System.out.println("free FCB "+entry);
readFCB(entry, fcb);
fcb.SetDeleted( );
writeFCB(entry, fcb);
directoryUsed[entry] = false;
}
files.Remove(file);
}
public void putFile(int user, String name, Stream ist)
{
FCB fcb = new FCB( );
int i, j;
int entry;
int blockCount = 0;
int record = 0;
CpmFile file = searchFile(user, name);
if (file != null)
{
throw new Exception(name + " Already exist");
}
file = new CpmFile(dpb, user, name);
fcb.Clear( );
fcb.SetUser(user);
fcb.SetFileName(name);
fcb.SetEX(0);
fcb.SetRC(0);
entry = allocateFCB( );
files.Add(file);
// Write empty directory
writeFCB(entry, fcb);
file.AddFCB(entry);
for ( ; ;)
{
int byteCount = ist.Read(block, 0, getBlockSize( ));
if (byteCount <= 0)
{
break;
}
//System.out.println("Writing "+byteCount+" bytes");
int recordCount = (byteCount + 127) / 128;
while (recordCount > 0)
{
if (blockCount >= getFCBBlockCount( ))
{
entry = allocateFCB( );
fcb.ClearBlocks( );
fcb.SetRC(0);
fcb.SetEX(fcb.getEX( ) + 1);
//fcb[12] = (byte)(fcb[12]+getRecordForFCB()/128);
writeFCB(entry, fcb);
file.AddFCB(entry);
blockCount = 0;
}
int blockNo = allocateBlock( );
//System.out.print("block "+blockNo+" at "+blockCount);
putFCBBlock(fcb, blockCount++, blockNo);
if (recordCount > dpb.blm + 1)
{
record = dpb.blm + 1;
}
else
{
record = recordCount;
}
recordCount -= record;
record += fcb.getRC( );
record &= 0xff;
if (record > 128)
{
fcb.SetEX(fcb.getEX( ) + 1);
if (record > 128)
{
record -= 128;
}
}
fcb.SetRC(record);
//System.out.print(" ex "+fcb[12]+" rc "+(fcb[15] & 0xff)+" ");
writeFCB(entry, fcb);
file.AddBlock(blockNo);
writeBlock(blockNo, block);
}
}
}
public void mount( )
{
FCB fcb = new FCB( );
disk.mount( );
// Mark all block as not used
for (int i = 0; i < blockUsed.Length; i++)
{
blockUsed[i] = false;
}
// Mark directory block as used
for (int i = 0; i < 8; i++)
{
if ((dpb.alloc0 & (1 << (7 - i))) != 0)
{
blockUsed[i] = true;
}
if ((dpb.alloc1 & (1 << (7 - i))) != 0)
{
blockUsed[8 + i] = true;
}
}
files = new ArrayList();
for (int i = 0; i <= dpb.drm; i++)
{
readFCB(i, fcb);
if (fcb.getDeleted( ))
{
directoryUsed[i] = false;
continue;
}
int user = fcb.getUser( );
int ext = fcb.getEX( );
int record = fcb.getRC( );
directoryUsed[i] = true;
// Skip not valid user
if (user > 31)
{
continue;
}
// Mark directory entry used
directoryUsed[i] = true;
String fileName = fcb.getFileName( );
CpmFile file = searchFile(user, fileName);
if (file == null)
{
file = new CpmFile(dpb, user, fileName);
files.Add(file);
}
file.AddFCB(i);
// Read block number from FCB
for (int j = 0; j < getFCBBlockCount( ); j++)
{
int b = getFCBBlock(fcb, j);
if (b == 0)
{
break;
}
blockUsed[b] = true;
file.AddBlock(b);
}
}
}
private void writeFCB(int dir, FCB fcb)
{
int offset = dir * 32;
int sector = offset / 128;
offset = offset % 128;
readSector(sector, fcbBuffer);
for ( int i = 0; i < 32; i++ )
fcbBuffer[offset + i] = fcb.getBytes( )[i];
writeSector(sector, fcbBuffer);
}
private void readFCB(int dir, FCB fcb)
{
int offset = dir * 32;
int sector = offset / 128;
offset = offset % 128;
readSector(sector, fcbBuffer);
fcb.setBuffer(fcbBuffer, offset);
}
private void putFCBBlock(FCB fcb, int n, int block)
{
if ( getFCBBlockLength( ) == 1 )
fcb.setBlockByte(n, block);
else {
fcb.setBlockWord(n, block);
}
}
private int getFCBBlock(FCB fcb, int block)
{
if ( getFCBBlockLength( ) == 1 )
return fcb.getBlockByte(block);
else
return fcb.getBlockWord(block);
}
public void putFile(int user, String name, Stream ist)
{
FCB fcb = new FCB( );
int i, j;
int entry;
int blockCount = 0;
int record = 0;
CpmFile file = searchFile(user, name);
if ( file != null )
throw new Exception(name + " Already exist");
file = new CpmFile(dpb, user, name);
fcb.Clear( );
fcb.SetUser(user);
fcb.SetFileName(name);
fcb.SetEX(0);
fcb.SetRC(0);
entry = allocateFCB( );
files.Add(file);
// Write empty directory
writeFCB(entry, fcb);
file.AddFCB(entry);
for ( ; ; ) {
int byteCount = ist.Read(block, 0, getBlockSize( ));
if ( byteCount <= 0 )
break;
//System.out.println("Writing "+byteCount+" bytes");
int recordCount = ( byteCount + 127 ) / 128;
while ( recordCount > 0 ) {
if ( blockCount >= getFCBBlockCount( ) ) {
entry = allocateFCB( );
fcb.ClearBlocks( );
fcb.SetRC(0);
fcb.SetEX(fcb.getEX( ) + 1);
//fcb[12] = (byte)(fcb[12]+getRecordForFCB()/128);
writeFCB(entry, fcb);
file.AddFCB(entry);
blockCount = 0;
}
int blockNo = allocateBlock( );
//System.out.print("block "+blockNo+" at "+blockCount);
putFCBBlock(fcb, blockCount++, blockNo);
if ( recordCount > dpb.blm + 1 )
record = dpb.blm + 1;
else
record = recordCount;
recordCount -= record;
record += fcb.getRC( );
record &= 0xff;
if ( record > 128 ) {
fcb.SetEX(fcb.getEX( ) + 1);
if ( record > 128 )
record -= 128;
}
fcb.SetRC(record);
//System.out.print(" ex "+fcb[12]+" rc "+(fcb[15] & 0xff)+" ");
writeFCB(entry, fcb);
file.AddBlock(blockNo);
writeBlock(blockNo, block);
}
}
}
public void mount( )
{
FCB fcb = new FCB( );
disk.mount( );
// Mark all block as not used
for ( int i = 0; i < blockUsed.Length; i++ )
blockUsed[i] = false;
// Mark directory block as used
for ( int i = 0; i < 8; i++ ) {
if ( ( dpb.alloc0 & ( 1 << ( 7 - i ) ) ) != 0 )
blockUsed[i] = true;
if ( ( dpb.alloc1 & ( 1 << ( 7 - i ) ) ) != 0 )
blockUsed[8 + i] = true;
}
files = new ArrayList();
for ( int i = 0; i <= dpb.drm; i++ ) {
readFCB(i, fcb);
if ( fcb.getDeleted( ) ) {
directoryUsed[i] = false;
continue;
}
int user = fcb.getUser( );
int ext = fcb.getEX( );
int record = fcb.getRC( );
directoryUsed[i] = true;
// Skip not valid user
if ( user > 31 ) {
continue;
}
// Mark directory entry used
directoryUsed[i] = true;
String fileName = fcb.getFileName( );
CpmFile file = searchFile(user, fileName);
if ( file == null ) {
file = new CpmFile(dpb, user, fileName);
files.Add(file);
}
file.AddFCB(i);
// Read block number from FCB
for ( int j = 0; j < getFCBBlockCount( ); j++ ) {
int b = getFCBBlock(fcb, j);
if ( b == 0 )
break;
blockUsed[b] = true;
file.AddBlock(b);
}
}
}
public int getFileSize(CpmFile file)
{
int size = 0;
FCB fcb = new FCB( );
for ( int i = 0; i < file.GetFCBCount( ); i++ ) {
readFCB(file.GetFCBAt(i), fcb);
int ex = ( fcb.getEX( ) & 0x1f ) & ~dpb.exm;
int record = fcb.getRC( ) & 0xff;
size = ex * 128 + ( ( dpb.exm & fcb.getEX( ) ) + 1 ) * 128 - ( 128 - record );
//System.out.println("name "+file.name+" ext "+ex+" record "+record);
}
return size;
}
