/// <summary>
/// Checks that the given directory blocks follow the CP/M filesystem directory specification
/// Corrupted directories will fail.
/// FAT firectories will false positive if all files start with 0x05, and do not use full extentions, for example:
/// "σAFILE.GZ" (using code page 437)
/// </summary>
/// <returns>False if the directory does not follow the directory specification</returns>
/// <param name="directory">Directory blocks.</param>
bool CheckDir(byte[] directory)
{
try
{
if (directory == null)
{
return(false);
}
int fileCount = 0;
for (int off = 0; off < directory.Length; off += 32)
{
DirectoryEntry entry = Marshal.ByteArrayToStructureLittleEndian <DirectoryEntry>(directory, off, 32);
if ((entry.statusUser & 0x7F) < 0x20)
{
for (int f = 0; f < 8; f++)
{
if (entry.filename[f] < 0x20 && entry.filename[f] != 0x00)
{
return(false);
}
}
for (int e = 0; e < 3; e++)
{
if (entry.extension[e] < 0x20 && entry.extension[e] != 0x00)
{
return(false);
}
}
if (!ArrayHelpers.ArrayIsNullOrWhiteSpace(entry.filename))
{
fileCount++;
}
}
else if (entry.statusUser == 0x20)
{
for (int f = 0; f < 8; f++)
{
if (entry.filename[f] < 0x20 && entry.filename[f] != 0x00)
{
return(false);
}
}
for (int e = 0; e < 3; e++)
{
if (entry.extension[e] < 0x20 && entry.extension[e] != 0x00)
{
return(false);
}
}
label = Encoding.ASCII.GetString(directory, off + 1, 11).Trim();
labelCreationDate = new byte[4];
labelUpdateDate = new byte[4];
Array.Copy(directory, off + 24, labelCreationDate, 0, 4);
Array.Copy(directory, off + 28, labelUpdateDate, 0, 4);
}
else if (entry.statusUser == 0x21)
{
if (directory[off + 1] == 0x00)
{
thirdPartyTimestamps = true;
}
else
{
standardTimestamps |= directory[off + 21] == 0x00 && directory[off + 31] == 0x00;
}
}
}
return(fileCount > 0);
}
catch { return(false); }
}
public bool FujitsuDisplay(out byte[] senseBuffer, bool flash, FujitsuDisplayModes mode, string firstHalf,
string secondHalf, uint timeout, out double duration)
{
byte[] tmp;
byte[] firstHalfBytes = new byte[8];
byte[] secondHalfBytes = new byte[8];
byte[] buffer = new byte[17];
bool displayLen = false;
bool halfMsg = false;
byte[] cdb = new byte[10];
if (!string.IsNullOrWhiteSpace(firstHalf))
{
tmp = Encoding.ASCII.GetBytes(firstHalf);
Array.Copy(tmp, 0, firstHalfBytes, 0, 8);
}
if (!string.IsNullOrWhiteSpace(secondHalf))
{
tmp = Encoding.ASCII.GetBytes(secondHalf);
Array.Copy(tmp, 0, secondHalfBytes, 0, 8);
}
if (mode != FujitsuDisplayModes.Half)
{
if (!ArrayHelpers.ArrayIsNullOrWhiteSpace(firstHalfBytes) &&
!ArrayHelpers.ArrayIsNullOrWhiteSpace(secondHalfBytes))
{
displayLen = true;
}
else if (!ArrayHelpers.ArrayIsNullOrWhiteSpace(firstHalfBytes) &&
ArrayHelpers.ArrayIsNullOrWhiteSpace(secondHalfBytes))
{
halfMsg = true;
}
}
buffer[0] = (byte)((byte)mode << 5);
if (displayLen)
{
buffer[0] += 0x10;
}
if (flash)
{
buffer[0] += 0x08;
}
if (halfMsg)
{
buffer[0] += 0x04;
}
buffer[0] += 0x01; // Always ASCII
Array.Copy(firstHalfBytes, 0, buffer, 1, 8);
Array.Copy(secondHalfBytes, 0, buffer, 9, 8);
cdb[0] = (byte)ScsiCommands.FujitsuDisplay;
cdb[6] = (byte)buffer.Length;
LastError = SendScsiCommand(cdb, ref buffer, out senseBuffer, timeout, ScsiDirection.Out, out duration,
out bool sense);
Error = LastError != 0;
DicConsole.DebugWriteLine("SCSI Device", "FUJITSU DISPLAY took {0} ms.", duration);
return(sense);
}
