private static void CreateDirectory(string directory)
{
string[] directories = directory.Split('/');
uint currentcluster = 0;
int current = 0;
while (true)
{
StartLoop:
ReadCluster(currentcluster);
for (int i = 0; i < filesystemdefinition.ClusterSizeInBytes; i += 64)
{
if ((cluster[i] & 0x3) == 1)
{
string str = ASCIIEncoding.ASCII.GetString(cluster, i + 32, 32);
str = str.TrimEnd('\0');
if (str == directories[current])
{
current++;
if (current > directories.Length - 1)
{
return;
}
currentcluster = BitConverter.ToUInt32(cluster, i + 1);
goto StartLoop;
}
}
}
uint nextcluster = GetNextClusterInChain(currentcluster);
if (nextcluster == (uint)0xFFFFFFFE)
{
uint free = FindFreeCluster();
ClearCluster(free);
WriteClusterChain(free);
DirectoryEntry entry = new DirectoryEntry();
entry.Attributes = 0x01;
//entry.FileName = directories[current];
entry.FirstCluster = free;
WriteDirectoryEntryToDirectory(currentcluster, ref entry);
currentcluster = free;
current++;
if (current > directories.Length - 1)
{
return;
}
}
else
{
currentcluster = nextcluster;
}
}
}
private static void AddFile(string diskFileName, string fileName)
{
string[] path = fileName.Split('/');
string directory = null;
if (path.Length > 1)
{
directory = fileName.Substring(0, fileName.LastIndexOf('/'));
}
FileStream file = File.Open(diskFileName, FileMode.Open, FileAccess.Read);
byte[] data = new byte[file.Length];
file.Read(data, 0, data.Length);
byte[] sector = new byte[filesystemdefinition.SectorSizeInBytes];
byte[] cluster = new byte[filesystemdefinition.ClusterSizeInBytes];
//Find free clusters for the file
int remainder;
int clustersneeded = Math.DivRem(data.Length, filesystemdefinition.ClusterSizeInBytes, out remainder);
if (remainder > 0)
{
clustersneeded++;
}
uint[] clustersused = FindFreeClusters(clustersneeded);
//Write the file data to the free clusters
WriteData(data, clustersused);
//Create cluster chain
WriteClusterChain(clustersused);
//Write the filename
uint filenamecluster = FindFreeCluster();
byte[] filenamedata = ASCIIEncoding.ASCII.GetBytes(fileName);
WriteData(filenamedata, filenamecluster);
WriteClusterChain(filenamecluster);
//Create the directory entry
DirectoryEntry entry = new DirectoryEntry();
entry.Attributes = 0x03;
entry.FirstCluster = clustersused[0];
entry.FileSize = (uint)file.Length;
entry.FilenameCluster = filenamecluster;
//entry.FileName = path[path.Length - 1];
//Write directory entry to root directory
if (path.Length == 1)
{
WriteDirectoryEntryToDirectory(0, ref entry);
}
else
{
uint firstcluster = GetDirectoryFirstCluster(directory);
WriteDirectoryEntryToDirectory(firstcluster, ref entry);
}
//Close the file
file.Close();
}
private static void WriteDirectoryEntryToDirectory(uint firstDirectoryCluster, ref DirectoryEntry entry)
{
uint currentcluster = firstDirectoryCluster;
while (true)
{
ReadCluster(currentcluster);
for (int i = 0; i < filesystemdefinition.ClusterSizeInBytes; i += 64)
{
if (cluster[i] == 0)
{
Array.Copy(entry.ToBytes(), 0, cluster, i, 64);
WriteCluster(currentcluster, cluster);
return;
}
}
uint nextcluster = GetNextClusterInChain(currentcluster);
if (nextcluster == EndOfClusterChain)
{
currentcluster = ExpandDirectoryCluster(currentcluster);
}
else
{
currentcluster = nextcluster;
}
}
}
