public static DragonFs CreateFromStream(Stream source)
{
DragonFs newFs = new DragonFs();
DfsSector sector = new DfsSector(0);
source.Read(sector.Buffer, 0, (int)DfsSector.SECTOR_SIZE);
DfsDirectoryEntry root = new DfsDirectoryEntry(sector);
bool checkValid = true;
if ((root.Flags != ROOT_FLAGS) || (root.NextEntry != ROOT_NEXTENTRY))
{
checkValid = false;
}
else
{
// Check DFS version string
if (!root.Path.Equals(DragonFs.ROOT_PATH))
{
checkValid = false;
}
}
if (checkValid == false)
{
throw new ArgumentException("source", "The stream does not contain a valid DFS 2.0 image");
}
while (source.Position != source.Length)
{
sector = newFs.NewSector();
source.Read(sector.Buffer, 0, (int)DfsSector.SECTOR_SIZE);
}
// The virtual root directory entry needs to point to the first sector
// TODO: Can this be done better?
newFs._RootDirectory.FilePointer = DfsSector.SECTOR_SIZE;
return(newFs);
}
