public bool CreateDirectory(string name)
{
if (name.Length > 16320)
{
return(false);
}
//dir names must be guid
foreach (var entry in IndexAria)
{
if (entry is DirectoryEntry de)
{
if (de.Name == name)
{
return(false);
}
}
}
//add it
IndexAria.Insert(IndexAria.Count - 1, new DirectoryEntry
{
TimeStamp = 0,
Name = name
});
Save();
return(true);
}
public bool DeleteFile(string filePath)
{
foreach (var entry in IndexAria)
{
if (entry is FileEntry fe)
{
if (fe.Name == filePath)
{
IndexAria.Remove(fe);
Save();
return(true);
}
}
}
return(false);
}
public bool DeleteDirectory(string name)
{
//dir names must be guid
foreach (var entry in IndexAria)
{
if (entry is DirectoryEntry de)
{
if (de.Name == name)
{
IndexAria.Remove(de);
Save();
return(true);
}
}
}
return(false);
}
private void ReadIndexAria()
{
IndexAria.Clear();
var endOfVolume = BlockDevice.BlockSize * BlockDevice.TotalBlocks;
var offset = 1;
while (endOfVolume > offset * 64)
{
BlockBuffer.Offset = endOfVolume - offset * 64;
var id = BlockBuffer.ReadByte();
BlockBuffer.Offset--;
switch (id)
{
case 0x01: // VolumeIdentifier
{
var x = new VolumeIdentifier();
x.Read(BlockBuffer);
IndexAria.Add(x);
}
break;
case 0x02: // Starting Marker Entry
{
var x = new StartingMarkerEntry();
x.Read(BlockBuffer);
IndexAria.Add(x);
return;
}
case 0x10: // Unused Entry
{
var x = new UnusedEntry();
x.Read(BlockBuffer);
IndexAria.Add(x);
}
break;
case 0x11: // Directory Entry
{
var x = new DirectoryEntry();
x.Read(BlockBuffer);
IndexAria.Add(x);
if (x.Continuations > 0)
{
offset += x.Continuations + 1;
BlockBuffer.Offset = endOfVolume - offset * 64;
x.Name = BlockBuffer.ReadString();
}
}
break;
case 0x12: // File Entry
{
var x = new FileEntry();
x.Read(BlockBuffer);
IndexAria.Add(x);
if (x.Continuations > 0)
{
offset += x.Continuations + 1;
BlockBuffer.Offset = endOfVolume - offset * 64;
x.Name = BlockBuffer.ReadString();
}
}
break;
case 0x18: // Unusable Entry
{
var x = new UnusableEntry();
x.Read(BlockBuffer);
IndexAria.Add(x);
}
break;
case 0x19: // Deleted Directory Entry
{
var x = new DeletedDirectoryEntry();
x.Read(BlockBuffer);
IndexAria.Add(x);
if (x.Continuations > 0)
{
offset += x.Continuations + 1;
BlockBuffer.Offset = endOfVolume - offset * 64;
x.Name = BlockBuffer.ReadString();
}
}
break;
case 0x1A: // Deleted File Entry
{
var x = new DeletedFileEntry();
x.Read(BlockBuffer);
IndexAria.Add(x);
if (x.Continuations > 0)
{
offset += x.Continuations + 1;
BlockBuffer.Offset = endOfVolume - offset * 64;
x.Name = BlockBuffer.ReadString();
}
}
break;
}
offset++;
}
}
public bool WriteAllBytes(string filePath, byte[] data)
{
if (filePath.Length > 16320)
{
return(false);
}
FileEntry fileEntry = null;
//file names must be guid
foreach (var entry in IndexAria)
{
if (entry is FileEntry fe)
{
if (fe.Name == filePath)
{
fileEntry = fe;
break;
}
}
}
if (fileEntry == null)
{
fileEntry = new FileEntry
{
StartingBlock = SuperBlock.DataSizeInBlocks + SuperBlock.TotalReservedBlocks,
EndingBlock = (SuperBlock.DataSizeInBlocks + SuperBlock.TotalReservedBlocks) +
(data.Length / BlockDevice.BlockSize) + 1,
Length = data.Length,
Name = filePath,
TimeStamp = 0
};
SuperBlock.DataSizeInBlocks += fileEntry.EndingBlock - fileEntry.StartingBlock;
//add it
IndexAria.Insert(IndexAria.Count - 1, fileEntry);
}
//write data
var bl = fileEntry.EndingBlock - fileEntry.StartingBlock;
var buf = new byte[BlockDevice.BlockSize];
long c = 0;
for (int i = 0; i < bl - 1; i++)
{
Array.Copy(data, i * BlockDevice.BlockSize, buf, 0, BlockDevice.BlockSize);
c += BlockDevice.BlockSize;
BlockDevice.WriteBlock(fileEntry.StartingBlock + i, buf);
}
Array.Copy(data, c, buf, 0, data.Length - c);
BlockDevice.WriteBlock(fileEntry.StartingBlock + (bl - 1), buf);
Save();
return(true);
}
